xref: /linux/drivers/platform/x86/thinkpad_acpi.c (revision 26fbb4c8c7c3ee9a4c3b4de555a8587b5a19154e)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  thinkpad_acpi.c - ThinkPad ACPI Extras
4  *
5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7  */
8 
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 
11 #define TPACPI_VERSION "0.26"
12 #define TPACPI_SYSFS_VERSION 0x030000
13 
14 /*
15  *  Changelog:
16  *  2007-10-20		changelog trimmed down
17  *
18  *  2007-03-27  0.14	renamed to thinkpad_acpi and moved to
19  *  			drivers/misc.
20  *
21  *  2006-11-22	0.13	new maintainer
22  *  			changelog now lives in git commit history, and will
23  *  			not be updated further in-file.
24  *
25  *  2005-03-17	0.11	support for 600e, 770x
26  *			    thanks to Jamie Lentin <lentinj@dial.pipex.com>
27  *
28  *  2005-01-16	0.9	use MODULE_VERSION
29  *			    thanks to Henrik Brix Andersen <brix@gentoo.org>
30  *			fix parameter passing on module loading
31  *			    thanks to Rusty Russell <rusty@rustcorp.com.au>
32  *			    thanks to Jim Radford <radford@blackbean.org>
33  *  2004-11-08	0.8	fix init error case, don't return from a macro
34  *			    thanks to Chris Wright <chrisw@osdl.org>
35  */
36 
37 #include <linux/kernel.h>
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/types.h>
41 #include <linux/string.h>
42 #include <linux/list.h>
43 #include <linux/mutex.h>
44 #include <linux/sched.h>
45 #include <linux/sched/signal.h>
46 #include <linux/kthread.h>
47 #include <linux/freezer.h>
48 #include <linux/delay.h>
49 #include <linux/slab.h>
50 #include <linux/nvram.h>
51 #include <linux/proc_fs.h>
52 #include <linux/seq_file.h>
53 #include <linux/sysfs.h>
54 #include <linux/backlight.h>
55 #include <linux/bitops.h>
56 #include <linux/fb.h>
57 #include <linux/platform_device.h>
58 #include <linux/hwmon.h>
59 #include <linux/hwmon-sysfs.h>
60 #include <linux/input.h>
61 #include <linux/leds.h>
62 #include <linux/rfkill.h>
63 #include <linux/dmi.h>
64 #include <linux/jiffies.h>
65 #include <linux/workqueue.h>
66 #include <linux/acpi.h>
67 #include <linux/pci.h>
68 #include <linux/power_supply.h>
69 #include <sound/core.h>
70 #include <sound/control.h>
71 #include <sound/initval.h>
72 #include <linux/uaccess.h>
73 #include <acpi/battery.h>
74 #include <acpi/video.h>
75 
76 /* ThinkPad CMOS commands */
77 #define TP_CMOS_VOLUME_DOWN	0
78 #define TP_CMOS_VOLUME_UP	1
79 #define TP_CMOS_VOLUME_MUTE	2
80 #define TP_CMOS_BRIGHTNESS_UP	4
81 #define TP_CMOS_BRIGHTNESS_DOWN	5
82 #define TP_CMOS_THINKLIGHT_ON	12
83 #define TP_CMOS_THINKLIGHT_OFF	13
84 
85 /* NVRAM Addresses */
86 enum tp_nvram_addr {
87 	TP_NVRAM_ADDR_HK2		= 0x57,
88 	TP_NVRAM_ADDR_THINKLIGHT	= 0x58,
89 	TP_NVRAM_ADDR_VIDEO		= 0x59,
90 	TP_NVRAM_ADDR_BRIGHTNESS	= 0x5e,
91 	TP_NVRAM_ADDR_MIXER		= 0x60,
92 };
93 
94 /* NVRAM bit masks */
95 enum {
96 	TP_NVRAM_MASK_HKT_THINKPAD	= 0x08,
97 	TP_NVRAM_MASK_HKT_ZOOM		= 0x20,
98 	TP_NVRAM_MASK_HKT_DISPLAY	= 0x40,
99 	TP_NVRAM_MASK_HKT_HIBERNATE	= 0x80,
100 	TP_NVRAM_MASK_THINKLIGHT	= 0x10,
101 	TP_NVRAM_MASK_HKT_DISPEXPND	= 0x30,
102 	TP_NVRAM_MASK_HKT_BRIGHTNESS	= 0x20,
103 	TP_NVRAM_MASK_LEVEL_BRIGHTNESS	= 0x0f,
104 	TP_NVRAM_POS_LEVEL_BRIGHTNESS	= 0,
105 	TP_NVRAM_MASK_MUTE		= 0x40,
106 	TP_NVRAM_MASK_HKT_VOLUME	= 0x80,
107 	TP_NVRAM_MASK_LEVEL_VOLUME	= 0x0f,
108 	TP_NVRAM_POS_LEVEL_VOLUME	= 0,
109 };
110 
111 /* Misc NVRAM-related */
112 enum {
113 	TP_NVRAM_LEVEL_VOLUME_MAX = 14,
114 };
115 
116 /* ACPI HIDs */
117 #define TPACPI_ACPI_IBM_HKEY_HID	"IBM0068"
118 #define TPACPI_ACPI_LENOVO_HKEY_HID	"LEN0068"
119 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID	"LEN0268"
120 #define TPACPI_ACPI_EC_HID		"PNP0C09"
121 
122 /* Input IDs */
123 #define TPACPI_HKEY_INPUT_PRODUCT	0x5054 /* "TP" */
124 #define TPACPI_HKEY_INPUT_VERSION	0x4101
125 
126 /* ACPI \WGSV commands */
127 enum {
128 	TP_ACPI_WGSV_GET_STATE		= 0x01, /* Get state information */
129 	TP_ACPI_WGSV_PWR_ON_ON_RESUME	= 0x02, /* Resume WWAN powered on */
130 	TP_ACPI_WGSV_PWR_OFF_ON_RESUME	= 0x03,	/* Resume WWAN powered off */
131 	TP_ACPI_WGSV_SAVE_STATE		= 0x04, /* Save state for S4/S5 */
132 };
133 
134 /* TP_ACPI_WGSV_GET_STATE bits */
135 enum {
136 	TP_ACPI_WGSV_STATE_WWANEXIST	= 0x0001, /* WWAN hw available */
137 	TP_ACPI_WGSV_STATE_WWANPWR	= 0x0002, /* WWAN radio enabled */
138 	TP_ACPI_WGSV_STATE_WWANPWRRES	= 0x0004, /* WWAN state at resume */
139 	TP_ACPI_WGSV_STATE_WWANBIOSOFF	= 0x0008, /* WWAN disabled in BIOS */
140 	TP_ACPI_WGSV_STATE_BLTHEXIST	= 0x0001, /* BLTH hw available */
141 	TP_ACPI_WGSV_STATE_BLTHPWR	= 0x0002, /* BLTH radio enabled */
142 	TP_ACPI_WGSV_STATE_BLTHPWRRES	= 0x0004, /* BLTH state at resume */
143 	TP_ACPI_WGSV_STATE_BLTHBIOSOFF	= 0x0008, /* BLTH disabled in BIOS */
144 	TP_ACPI_WGSV_STATE_UWBEXIST	= 0x0010, /* UWB hw available */
145 	TP_ACPI_WGSV_STATE_UWBPWR	= 0x0020, /* UWB radio enabled */
146 };
147 
148 /* HKEY events */
149 enum tpacpi_hkey_event_t {
150 	/* Hotkey-related */
151 	TP_HKEY_EV_HOTKEY_BASE		= 0x1001, /* first hotkey (FN+F1) */
152 	TP_HKEY_EV_BRGHT_UP		= 0x1010, /* Brightness up */
153 	TP_HKEY_EV_BRGHT_DOWN		= 0x1011, /* Brightness down */
154 	TP_HKEY_EV_KBD_LIGHT		= 0x1012, /* Thinklight/kbd backlight */
155 	TP_HKEY_EV_VOL_UP		= 0x1015, /* Volume up or unmute */
156 	TP_HKEY_EV_VOL_DOWN		= 0x1016, /* Volume down or unmute */
157 	TP_HKEY_EV_VOL_MUTE		= 0x1017, /* Mixer output mute */
158 
159 	/* Reasons for waking up from S3/S4 */
160 	TP_HKEY_EV_WKUP_S3_UNDOCK	= 0x2304, /* undock requested, S3 */
161 	TP_HKEY_EV_WKUP_S4_UNDOCK	= 0x2404, /* undock requested, S4 */
162 	TP_HKEY_EV_WKUP_S3_BAYEJ	= 0x2305, /* bay ejection req, S3 */
163 	TP_HKEY_EV_WKUP_S4_BAYEJ	= 0x2405, /* bay ejection req, S4 */
164 	TP_HKEY_EV_WKUP_S3_BATLOW	= 0x2313, /* battery empty, S3 */
165 	TP_HKEY_EV_WKUP_S4_BATLOW	= 0x2413, /* battery empty, S4 */
166 
167 	/* Auto-sleep after eject request */
168 	TP_HKEY_EV_BAYEJ_ACK		= 0x3003, /* bay ejection complete */
169 	TP_HKEY_EV_UNDOCK_ACK		= 0x4003, /* undock complete */
170 
171 	/* Misc bay events */
172 	TP_HKEY_EV_OPTDRV_EJ		= 0x3006, /* opt. drive tray ejected */
173 	TP_HKEY_EV_HOTPLUG_DOCK		= 0x4010, /* docked into hotplug dock
174 						     or port replicator */
175 	TP_HKEY_EV_HOTPLUG_UNDOCK	= 0x4011, /* undocked from hotplug
176 						     dock or port replicator */
177 
178 	/* User-interface events */
179 	TP_HKEY_EV_LID_CLOSE		= 0x5001, /* laptop lid closed */
180 	TP_HKEY_EV_LID_OPEN		= 0x5002, /* laptop lid opened */
181 	TP_HKEY_EV_TABLET_TABLET	= 0x5009, /* tablet swivel up */
182 	TP_HKEY_EV_TABLET_NOTEBOOK	= 0x500a, /* tablet swivel down */
183 	TP_HKEY_EV_TABLET_CHANGED	= 0x60c0, /* X1 Yoga (2016):
184 						   * enter/leave tablet mode
185 						   */
186 	TP_HKEY_EV_PEN_INSERTED		= 0x500b, /* tablet pen inserted */
187 	TP_HKEY_EV_PEN_REMOVED		= 0x500c, /* tablet pen removed */
188 	TP_HKEY_EV_BRGHT_CHANGED	= 0x5010, /* backlight control event */
189 
190 	/* Key-related user-interface events */
191 	TP_HKEY_EV_KEY_NUMLOCK		= 0x6000, /* NumLock key pressed */
192 	TP_HKEY_EV_KEY_FN		= 0x6005, /* Fn key pressed? E420 */
193 	TP_HKEY_EV_KEY_FN_ESC           = 0x6060, /* Fn+Esc key pressed X240 */
194 
195 	/* Thermal events */
196 	TP_HKEY_EV_ALARM_BAT_HOT	= 0x6011, /* battery too hot */
197 	TP_HKEY_EV_ALARM_BAT_XHOT	= 0x6012, /* battery critically hot */
198 	TP_HKEY_EV_ALARM_SENSOR_HOT	= 0x6021, /* sensor too hot */
199 	TP_HKEY_EV_ALARM_SENSOR_XHOT	= 0x6022, /* sensor critically hot */
200 	TP_HKEY_EV_THM_TABLE_CHANGED	= 0x6030, /* windows; thermal table changed */
201 	TP_HKEY_EV_THM_CSM_COMPLETED    = 0x6032, /* windows; thermal control set
202 						   * command completed. Related to
203 						   * AML DYTC */
204 	TP_HKEY_EV_THM_TRANSFM_CHANGED  = 0x60F0, /* windows; thermal transformation
205 						   * changed. Related to AML GMTS */
206 
207 	/* AC-related events */
208 	TP_HKEY_EV_AC_CHANGED		= 0x6040, /* AC status changed */
209 
210 	/* Further user-interface events */
211 	TP_HKEY_EV_PALM_DETECTED	= 0x60b0, /* palm hoveres keyboard */
212 	TP_HKEY_EV_PALM_UNDETECTED	= 0x60b1, /* palm removed */
213 
214 	/* Misc */
215 	TP_HKEY_EV_RFKILL_CHANGED	= 0x7000, /* rfkill switch changed */
216 };
217 
218 /****************************************************************************
219  * Main driver
220  */
221 
222 #define TPACPI_NAME "thinkpad"
223 #define TPACPI_DESC "ThinkPad ACPI Extras"
224 #define TPACPI_FILE TPACPI_NAME "_acpi"
225 #define TPACPI_URL "http://ibm-acpi.sf.net/"
226 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
227 
228 #define TPACPI_PROC_DIR "ibm"
229 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
230 #define TPACPI_DRVR_NAME TPACPI_FILE
231 #define TPACPI_DRVR_SHORTNAME "tpacpi"
232 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
233 
234 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
235 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
236 
237 #define TPACPI_MAX_ACPI_ARGS 3
238 
239 /* Debugging printk groups */
240 #define TPACPI_DBG_ALL		0xffff
241 #define TPACPI_DBG_DISCLOSETASK	0x8000
242 #define TPACPI_DBG_INIT		0x0001
243 #define TPACPI_DBG_EXIT		0x0002
244 #define TPACPI_DBG_RFKILL	0x0004
245 #define TPACPI_DBG_HKEY		0x0008
246 #define TPACPI_DBG_FAN		0x0010
247 #define TPACPI_DBG_BRGHT	0x0020
248 #define TPACPI_DBG_MIXER	0x0040
249 
250 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
251 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
252 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
253 
254 
255 /****************************************************************************
256  * Driver-wide structs and misc. variables
257  */
258 
259 struct ibm_struct;
260 
261 struct tp_acpi_drv_struct {
262 	const struct acpi_device_id *hid;
263 	struct acpi_driver *driver;
264 
265 	void (*notify) (struct ibm_struct *, u32);
266 	acpi_handle *handle;
267 	u32 type;
268 	struct acpi_device *device;
269 };
270 
271 struct ibm_struct {
272 	char *name;
273 
274 	int (*read) (struct seq_file *);
275 	int (*write) (char *);
276 	void (*exit) (void);
277 	void (*resume) (void);
278 	void (*suspend) (void);
279 	void (*shutdown) (void);
280 
281 	struct list_head all_drivers;
282 
283 	struct tp_acpi_drv_struct *acpi;
284 
285 	struct {
286 		u8 acpi_driver_registered:1;
287 		u8 acpi_notify_installed:1;
288 		u8 proc_created:1;
289 		u8 init_called:1;
290 		u8 experimental:1;
291 	} flags;
292 };
293 
294 struct ibm_init_struct {
295 	char param[32];
296 
297 	int (*init) (struct ibm_init_struct *);
298 	umode_t base_procfs_mode;
299 	struct ibm_struct *data;
300 };
301 
302 static struct {
303 	u32 bluetooth:1;
304 	u32 hotkey:1;
305 	u32 hotkey_mask:1;
306 	u32 hotkey_wlsw:1;
307 	enum {
308 		TP_HOTKEY_TABLET_NONE = 0,
309 		TP_HOTKEY_TABLET_USES_MHKG,
310 		TP_HOTKEY_TABLET_USES_GMMS,
311 	} hotkey_tablet;
312 	u32 kbdlight:1;
313 	u32 light:1;
314 	u32 light_status:1;
315 	u32 bright_acpimode:1;
316 	u32 bright_unkfw:1;
317 	u32 wan:1;
318 	u32 uwb:1;
319 	u32 fan_ctrl_status_undef:1;
320 	u32 second_fan:1;
321 	u32 second_fan_ctl:1;
322 	u32 beep_needs_two_args:1;
323 	u32 mixer_no_level_control:1;
324 	u32 battery_force_primary:1;
325 	u32 input_device_registered:1;
326 	u32 platform_drv_registered:1;
327 	u32 platform_drv_attrs_registered:1;
328 	u32 sensors_pdrv_registered:1;
329 	u32 sensors_pdrv_attrs_registered:1;
330 	u32 sensors_pdev_attrs_registered:1;
331 	u32 hotkey_poll_active:1;
332 	u32 has_adaptive_kbd:1;
333 } tp_features;
334 
335 static struct {
336 	u16 hotkey_mask_ff:1;
337 	u16 volume_ctrl_forbidden:1;
338 } tp_warned;
339 
340 struct thinkpad_id_data {
341 	unsigned int vendor;	/* ThinkPad vendor:
342 				 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
343 
344 	char *bios_version_str;	/* Something like 1ZET51WW (1.03z) */
345 	char *ec_version_str;	/* Something like 1ZHT51WW-1.04a */
346 
347 	u32 bios_model;		/* 1Y = 0x3159, 0 = unknown */
348 	u32 ec_model;
349 	u16 bios_release;	/* 1ZETK1WW = 0x4b31, 0 = unknown */
350 	u16 ec_release;
351 
352 	char *model_str;	/* ThinkPad T43 */
353 	char *nummodel_str;	/* 9384A9C for a 9384-A9C model */
354 };
355 static struct thinkpad_id_data thinkpad_id;
356 
357 static enum {
358 	TPACPI_LIFE_INIT = 0,
359 	TPACPI_LIFE_RUNNING,
360 	TPACPI_LIFE_EXITING,
361 } tpacpi_lifecycle;
362 
363 static int experimental;
364 static u32 dbg_level;
365 
366 static struct workqueue_struct *tpacpi_wq;
367 
368 enum led_status_t {
369 	TPACPI_LED_OFF = 0,
370 	TPACPI_LED_ON,
371 	TPACPI_LED_BLINK,
372 };
373 
374 /* tpacpi LED class */
375 struct tpacpi_led_classdev {
376 	struct led_classdev led_classdev;
377 	int led;
378 };
379 
380 /* brightness level capabilities */
381 static unsigned int bright_maxlvl;	/* 0 = unknown */
382 
383 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
384 static int dbg_wlswemul;
385 static bool tpacpi_wlsw_emulstate;
386 static int dbg_bluetoothemul;
387 static bool tpacpi_bluetooth_emulstate;
388 static int dbg_wwanemul;
389 static bool tpacpi_wwan_emulstate;
390 static int dbg_uwbemul;
391 static bool tpacpi_uwb_emulstate;
392 #endif
393 
394 
395 /*************************************************************************
396  *  Debugging helpers
397  */
398 
399 #define dbg_printk(a_dbg_level, format, arg...)				\
400 do {									\
401 	if (dbg_level & (a_dbg_level))					\
402 		printk(KERN_DEBUG pr_fmt("%s: " format),		\
403 		       __func__, ##arg);				\
404 } while (0)
405 
406 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
407 #define vdbg_printk dbg_printk
408 static const char *str_supported(int is_supported);
409 #else
410 static inline const char *str_supported(int is_supported) { return ""; }
411 #define vdbg_printk(a_dbg_level, format, arg...)	\
412 	do { if (0) no_printk(format, ##arg); } while (0)
413 #endif
414 
415 static void tpacpi_log_usertask(const char * const what)
416 {
417 	printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
418 	       what, task_tgid_vnr(current));
419 }
420 
421 #define tpacpi_disclose_usertask(what, format, arg...)			\
422 do {									\
423 	if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) &&		\
424 		     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) {	\
425 		printk(KERN_DEBUG pr_fmt("%s: PID %d: " format),	\
426 		       what, task_tgid_vnr(current), ## arg);		\
427 	}								\
428 } while (0)
429 
430 /*
431  * Quirk handling helpers
432  *
433  * ThinkPad IDs and versions seen in the field so far are
434  * two or three characters from the set [0-9A-Z], i.e. base 36.
435  *
436  * We use values well outside that range as specials.
437  */
438 
439 #define TPACPI_MATCH_ANY		0xffffffffU
440 #define TPACPI_MATCH_ANY_VERSION	0xffffU
441 #define TPACPI_MATCH_UNKNOWN		0U
442 
443 /* TPID('1', 'Y') == 0x3159 */
444 #define TPID(__c1, __c2)	(((__c1) << 8) | (__c2))
445 #define TPID3(__c1, __c2, __c3)	(((__c1) << 16) | ((__c2) << 8) | (__c3))
446 #define TPVER TPID
447 
448 #define TPACPI_Q_IBM(__id1, __id2, __quirk)	\
449 	{ .vendor = PCI_VENDOR_ID_IBM,		\
450 	  .bios = TPID(__id1, __id2),		\
451 	  .ec = TPACPI_MATCH_ANY,		\
452 	  .quirks = (__quirk) }
453 
454 #define TPACPI_Q_LNV(__id1, __id2, __quirk)	\
455 	{ .vendor = PCI_VENDOR_ID_LENOVO,	\
456 	  .bios = TPID(__id1, __id2),		\
457 	  .ec = TPACPI_MATCH_ANY,		\
458 	  .quirks = (__quirk) }
459 
460 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \
461 	{ .vendor = PCI_VENDOR_ID_LENOVO,	\
462 	  .bios = TPID3(__id1, __id2, __id3),	\
463 	  .ec = TPACPI_MATCH_ANY,		\
464 	  .quirks = (__quirk) }
465 
466 #define TPACPI_QEC_IBM(__id1, __id2, __quirk)	\
467 	{ .vendor = PCI_VENDOR_ID_IBM,		\
468 	  .bios = TPACPI_MATCH_ANY,		\
469 	  .ec = TPID(__id1, __id2),		\
470 	  .quirks = (__quirk) }
471 
472 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)	\
473 	{ .vendor = PCI_VENDOR_ID_LENOVO,	\
474 	  .bios = TPACPI_MATCH_ANY,		\
475 	  .ec = TPID(__id1, __id2),		\
476 	  .quirks = (__quirk) }
477 
478 struct tpacpi_quirk {
479 	unsigned int vendor;
480 	u32 bios;
481 	u32 ec;
482 	unsigned long quirks;
483 };
484 
485 /**
486  * tpacpi_check_quirks() - search BIOS/EC version on a list
487  * @qlist:		array of &struct tpacpi_quirk
488  * @qlist_size:		number of elements in @qlist
489  *
490  * Iterates over a quirks list until one is found that matches the
491  * ThinkPad's vendor, BIOS and EC model.
492  *
493  * Returns 0 if nothing matches, otherwise returns the quirks field of
494  * the matching &struct tpacpi_quirk entry.
495  *
496  * The match criteria is: vendor, ec and bios much match.
497  */
498 static unsigned long __init tpacpi_check_quirks(
499 			const struct tpacpi_quirk *qlist,
500 			unsigned int qlist_size)
501 {
502 	while (qlist_size) {
503 		if ((qlist->vendor == thinkpad_id.vendor ||
504 				qlist->vendor == TPACPI_MATCH_ANY) &&
505 		    (qlist->bios == thinkpad_id.bios_model ||
506 				qlist->bios == TPACPI_MATCH_ANY) &&
507 		    (qlist->ec == thinkpad_id.ec_model ||
508 				qlist->ec == TPACPI_MATCH_ANY))
509 			return qlist->quirks;
510 
511 		qlist_size--;
512 		qlist++;
513 	}
514 	return 0;
515 }
516 
517 static inline bool __pure __init tpacpi_is_lenovo(void)
518 {
519 	return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
520 }
521 
522 static inline bool __pure __init tpacpi_is_ibm(void)
523 {
524 	return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
525 }
526 
527 /****************************************************************************
528  ****************************************************************************
529  *
530  * ACPI Helpers and device model
531  *
532  ****************************************************************************
533  ****************************************************************************/
534 
535 /*************************************************************************
536  * ACPI basic handles
537  */
538 
539 static acpi_handle root_handle;
540 static acpi_handle ec_handle;
541 
542 #define TPACPI_HANDLE(object, parent, paths...)			\
543 	static acpi_handle  object##_handle;			\
544 	static const acpi_handle * const object##_parent __initconst =	\
545 						&parent##_handle; \
546 	static char *object##_paths[] __initdata = { paths }
547 
548 TPACPI_HANDLE(ecrd, ec, "ECRD");	/* 570 */
549 TPACPI_HANDLE(ecwr, ec, "ECWR");	/* 570 */
550 
551 TPACPI_HANDLE(cmos, root, "\\UCMS",	/* R50, R50e, R50p, R51, */
552 					/* T4x, X31, X40 */
553 	   "\\CMOS",		/* A3x, G4x, R32, T23, T30, X22-24, X30 */
554 	   "\\CMS",		/* R40, R40e */
555 	   );			/* all others */
556 
557 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",	/* 600e/x, 770e, 770x */
558 	   "^HKEY",		/* R30, R31 */
559 	   "HKEY",		/* all others */
560 	   );			/* 570 */
561 
562 /*************************************************************************
563  * ACPI helpers
564  */
565 
566 static int acpi_evalf(acpi_handle handle,
567 		      int *res, char *method, char *fmt, ...)
568 {
569 	char *fmt0 = fmt;
570 	struct acpi_object_list params;
571 	union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
572 	struct acpi_buffer result, *resultp;
573 	union acpi_object out_obj;
574 	acpi_status status;
575 	va_list ap;
576 	char res_type;
577 	int success;
578 	int quiet;
579 
580 	if (!*fmt) {
581 		pr_err("acpi_evalf() called with empty format\n");
582 		return 0;
583 	}
584 
585 	if (*fmt == 'q') {
586 		quiet = 1;
587 		fmt++;
588 	} else
589 		quiet = 0;
590 
591 	res_type = *(fmt++);
592 
593 	params.count = 0;
594 	params.pointer = &in_objs[0];
595 
596 	va_start(ap, fmt);
597 	while (*fmt) {
598 		char c = *(fmt++);
599 		switch (c) {
600 		case 'd':	/* int */
601 			in_objs[params.count].integer.value = va_arg(ap, int);
602 			in_objs[params.count++].type = ACPI_TYPE_INTEGER;
603 			break;
604 			/* add more types as needed */
605 		default:
606 			pr_err("acpi_evalf() called with invalid format character '%c'\n",
607 			       c);
608 			va_end(ap);
609 			return 0;
610 		}
611 	}
612 	va_end(ap);
613 
614 	if (res_type != 'v') {
615 		result.length = sizeof(out_obj);
616 		result.pointer = &out_obj;
617 		resultp = &result;
618 	} else
619 		resultp = NULL;
620 
621 	status = acpi_evaluate_object(handle, method, &params, resultp);
622 
623 	switch (res_type) {
624 	case 'd':		/* int */
625 		success = (status == AE_OK &&
626 			   out_obj.type == ACPI_TYPE_INTEGER);
627 		if (success && res)
628 			*res = out_obj.integer.value;
629 		break;
630 	case 'v':		/* void */
631 		success = status == AE_OK;
632 		break;
633 		/* add more types as needed */
634 	default:
635 		pr_err("acpi_evalf() called with invalid format character '%c'\n",
636 		       res_type);
637 		return 0;
638 	}
639 
640 	if (!success && !quiet)
641 		pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
642 		       method, fmt0, acpi_format_exception(status));
643 
644 	return success;
645 }
646 
647 static int acpi_ec_read(int i, u8 *p)
648 {
649 	int v;
650 
651 	if (ecrd_handle) {
652 		if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
653 			return 0;
654 		*p = v;
655 	} else {
656 		if (ec_read(i, p) < 0)
657 			return 0;
658 	}
659 
660 	return 1;
661 }
662 
663 static int acpi_ec_write(int i, u8 v)
664 {
665 	if (ecwr_handle) {
666 		if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
667 			return 0;
668 	} else {
669 		if (ec_write(i, v) < 0)
670 			return 0;
671 	}
672 
673 	return 1;
674 }
675 
676 static int issue_thinkpad_cmos_command(int cmos_cmd)
677 {
678 	if (!cmos_handle)
679 		return -ENXIO;
680 
681 	if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
682 		return -EIO;
683 
684 	return 0;
685 }
686 
687 /*************************************************************************
688  * ACPI device model
689  */
690 
691 #define TPACPI_ACPIHANDLE_INIT(object) \
692 	drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
693 		object##_paths, ARRAY_SIZE(object##_paths))
694 
695 static void __init drv_acpi_handle_init(const char *name,
696 			   acpi_handle *handle, const acpi_handle parent,
697 			   char **paths, const int num_paths)
698 {
699 	int i;
700 	acpi_status status;
701 
702 	vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
703 		name);
704 
705 	for (i = 0; i < num_paths; i++) {
706 		status = acpi_get_handle(parent, paths[i], handle);
707 		if (ACPI_SUCCESS(status)) {
708 			dbg_printk(TPACPI_DBG_INIT,
709 				   "Found ACPI handle %s for %s\n",
710 				   paths[i], name);
711 			return;
712 		}
713 	}
714 
715 	vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
716 		    name);
717 	*handle = NULL;
718 }
719 
720 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
721 			u32 level, void *context, void **return_value)
722 {
723 	struct acpi_device *dev;
724 	if (!strcmp(context, "video")) {
725 		if (acpi_bus_get_device(handle, &dev))
726 			return AE_OK;
727 		if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
728 			return AE_OK;
729 	}
730 
731 	*(acpi_handle *)return_value = handle;
732 
733 	return AE_CTRL_TERMINATE;
734 }
735 
736 static void __init tpacpi_acpi_handle_locate(const char *name,
737 		const char *hid,
738 		acpi_handle *handle)
739 {
740 	acpi_status status;
741 	acpi_handle device_found;
742 
743 	BUG_ON(!name || !handle);
744 	vdbg_printk(TPACPI_DBG_INIT,
745 			"trying to locate ACPI handle for %s, using HID %s\n",
746 			name, hid ? hid : "NULL");
747 
748 	memset(&device_found, 0, sizeof(device_found));
749 	status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
750 				  (void *)name, &device_found);
751 
752 	*handle = NULL;
753 
754 	if (ACPI_SUCCESS(status)) {
755 		*handle = device_found;
756 		dbg_printk(TPACPI_DBG_INIT,
757 			   "Found ACPI handle for %s\n", name);
758 	} else {
759 		vdbg_printk(TPACPI_DBG_INIT,
760 			    "Could not locate an ACPI handle for %s: %s\n",
761 			    name, acpi_format_exception(status));
762 	}
763 }
764 
765 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
766 {
767 	struct ibm_struct *ibm = data;
768 
769 	if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
770 		return;
771 
772 	if (!ibm || !ibm->acpi || !ibm->acpi->notify)
773 		return;
774 
775 	ibm->acpi->notify(ibm, event);
776 }
777 
778 static int __init setup_acpi_notify(struct ibm_struct *ibm)
779 {
780 	acpi_status status;
781 	int rc;
782 
783 	BUG_ON(!ibm->acpi);
784 
785 	if (!*ibm->acpi->handle)
786 		return 0;
787 
788 	vdbg_printk(TPACPI_DBG_INIT,
789 		"setting up ACPI notify for %s\n", ibm->name);
790 
791 	rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
792 	if (rc < 0) {
793 		pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
794 		return -ENODEV;
795 	}
796 
797 	ibm->acpi->device->driver_data = ibm;
798 	sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
799 		TPACPI_ACPI_EVENT_PREFIX,
800 		ibm->name);
801 
802 	status = acpi_install_notify_handler(*ibm->acpi->handle,
803 			ibm->acpi->type, dispatch_acpi_notify, ibm);
804 	if (ACPI_FAILURE(status)) {
805 		if (status == AE_ALREADY_EXISTS) {
806 			pr_notice("another device driver is already handling %s events\n",
807 				  ibm->name);
808 		} else {
809 			pr_err("acpi_install_notify_handler(%s) failed: %s\n",
810 			       ibm->name, acpi_format_exception(status));
811 		}
812 		return -ENODEV;
813 	}
814 	ibm->flags.acpi_notify_installed = 1;
815 	return 0;
816 }
817 
818 static int __init tpacpi_device_add(struct acpi_device *device)
819 {
820 	return 0;
821 }
822 
823 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
824 {
825 	int rc;
826 
827 	dbg_printk(TPACPI_DBG_INIT,
828 		"registering %s as an ACPI driver\n", ibm->name);
829 
830 	BUG_ON(!ibm->acpi);
831 
832 	ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
833 	if (!ibm->acpi->driver) {
834 		pr_err("failed to allocate memory for ibm->acpi->driver\n");
835 		return -ENOMEM;
836 	}
837 
838 	sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
839 	ibm->acpi->driver->ids = ibm->acpi->hid;
840 
841 	ibm->acpi->driver->ops.add = &tpacpi_device_add;
842 
843 	rc = acpi_bus_register_driver(ibm->acpi->driver);
844 	if (rc < 0) {
845 		pr_err("acpi_bus_register_driver(%s) failed: %d\n",
846 		       ibm->name, rc);
847 		kfree(ibm->acpi->driver);
848 		ibm->acpi->driver = NULL;
849 	} else if (!rc)
850 		ibm->flags.acpi_driver_registered = 1;
851 
852 	return rc;
853 }
854 
855 
856 /****************************************************************************
857  ****************************************************************************
858  *
859  * Procfs Helpers
860  *
861  ****************************************************************************
862  ****************************************************************************/
863 
864 static int dispatch_proc_show(struct seq_file *m, void *v)
865 {
866 	struct ibm_struct *ibm = m->private;
867 
868 	if (!ibm || !ibm->read)
869 		return -EINVAL;
870 	return ibm->read(m);
871 }
872 
873 static int dispatch_proc_open(struct inode *inode, struct file *file)
874 {
875 	return single_open(file, dispatch_proc_show, PDE_DATA(inode));
876 }
877 
878 static ssize_t dispatch_proc_write(struct file *file,
879 			const char __user *userbuf,
880 			size_t count, loff_t *pos)
881 {
882 	struct ibm_struct *ibm = PDE_DATA(file_inode(file));
883 	char *kernbuf;
884 	int ret;
885 
886 	if (!ibm || !ibm->write)
887 		return -EINVAL;
888 	if (count > PAGE_SIZE - 1)
889 		return -EINVAL;
890 
891 	kernbuf = kmalloc(count + 1, GFP_KERNEL);
892 	if (!kernbuf)
893 		return -ENOMEM;
894 
895 	if (copy_from_user(kernbuf, userbuf, count)) {
896 		kfree(kernbuf);
897 		return -EFAULT;
898 	}
899 
900 	kernbuf[count] = 0;
901 	ret = ibm->write(kernbuf);
902 	if (ret == 0)
903 		ret = count;
904 
905 	kfree(kernbuf);
906 
907 	return ret;
908 }
909 
910 static const struct proc_ops dispatch_proc_ops = {
911 	.proc_open	= dispatch_proc_open,
912 	.proc_read	= seq_read,
913 	.proc_lseek	= seq_lseek,
914 	.proc_release	= single_release,
915 	.proc_write	= dispatch_proc_write,
916 };
917 
918 /****************************************************************************
919  ****************************************************************************
920  *
921  * Device model: input, hwmon and platform
922  *
923  ****************************************************************************
924  ****************************************************************************/
925 
926 static struct platform_device *tpacpi_pdev;
927 static struct platform_device *tpacpi_sensors_pdev;
928 static struct device *tpacpi_hwmon;
929 static struct input_dev *tpacpi_inputdev;
930 static struct mutex tpacpi_inputdev_send_mutex;
931 static LIST_HEAD(tpacpi_all_drivers);
932 
933 #ifdef CONFIG_PM_SLEEP
934 static int tpacpi_suspend_handler(struct device *dev)
935 {
936 	struct ibm_struct *ibm, *itmp;
937 
938 	list_for_each_entry_safe(ibm, itmp,
939 				 &tpacpi_all_drivers,
940 				 all_drivers) {
941 		if (ibm->suspend)
942 			(ibm->suspend)();
943 	}
944 
945 	return 0;
946 }
947 
948 static int tpacpi_resume_handler(struct device *dev)
949 {
950 	struct ibm_struct *ibm, *itmp;
951 
952 	list_for_each_entry_safe(ibm, itmp,
953 				 &tpacpi_all_drivers,
954 				 all_drivers) {
955 		if (ibm->resume)
956 			(ibm->resume)();
957 	}
958 
959 	return 0;
960 }
961 #endif
962 
963 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
964 			 tpacpi_suspend_handler, tpacpi_resume_handler);
965 
966 static void tpacpi_shutdown_handler(struct platform_device *pdev)
967 {
968 	struct ibm_struct *ibm, *itmp;
969 
970 	list_for_each_entry_safe(ibm, itmp,
971 				 &tpacpi_all_drivers,
972 				 all_drivers) {
973 		if (ibm->shutdown)
974 			(ibm->shutdown)();
975 	}
976 }
977 
978 static struct platform_driver tpacpi_pdriver = {
979 	.driver = {
980 		.name = TPACPI_DRVR_NAME,
981 		.pm = &tpacpi_pm,
982 	},
983 	.shutdown = tpacpi_shutdown_handler,
984 };
985 
986 static struct platform_driver tpacpi_hwmon_pdriver = {
987 	.driver = {
988 		.name = TPACPI_HWMON_DRVR_NAME,
989 	},
990 };
991 
992 /*************************************************************************
993  * sysfs support helpers
994  */
995 
996 struct attribute_set {
997 	unsigned int members, max_members;
998 	struct attribute_group group;
999 };
1000 
1001 struct attribute_set_obj {
1002 	struct attribute_set s;
1003 	struct attribute *a;
1004 } __attribute__((packed));
1005 
1006 static struct attribute_set *create_attr_set(unsigned int max_members,
1007 						const char *name)
1008 {
1009 	struct attribute_set_obj *sobj;
1010 
1011 	if (max_members == 0)
1012 		return NULL;
1013 
1014 	/* Allocates space for implicit NULL at the end too */
1015 	sobj = kzalloc(sizeof(struct attribute_set_obj) +
1016 		    max_members * sizeof(struct attribute *),
1017 		    GFP_KERNEL);
1018 	if (!sobj)
1019 		return NULL;
1020 	sobj->s.max_members = max_members;
1021 	sobj->s.group.attrs = &sobj->a;
1022 	sobj->s.group.name = name;
1023 
1024 	return &sobj->s;
1025 }
1026 
1027 #define destroy_attr_set(_set) \
1028 	kfree(_set)
1029 
1030 /* not multi-threaded safe, use it in a single thread per set */
1031 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1032 {
1033 	if (!s || !attr)
1034 		return -EINVAL;
1035 
1036 	if (s->members >= s->max_members)
1037 		return -ENOMEM;
1038 
1039 	s->group.attrs[s->members] = attr;
1040 	s->members++;
1041 
1042 	return 0;
1043 }
1044 
1045 static int add_many_to_attr_set(struct attribute_set *s,
1046 			struct attribute **attr,
1047 			unsigned int count)
1048 {
1049 	int i, res;
1050 
1051 	for (i = 0; i < count; i++) {
1052 		res = add_to_attr_set(s, attr[i]);
1053 		if (res)
1054 			return res;
1055 	}
1056 
1057 	return 0;
1058 }
1059 
1060 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1061 {
1062 	sysfs_remove_group(kobj, &s->group);
1063 	destroy_attr_set(s);
1064 }
1065 
1066 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1067 	sysfs_create_group(_kobj, &_attr_set->group)
1068 
1069 static int parse_strtoul(const char *buf,
1070 		unsigned long max, unsigned long *value)
1071 {
1072 	char *endp;
1073 
1074 	*value = simple_strtoul(skip_spaces(buf), &endp, 0);
1075 	endp = skip_spaces(endp);
1076 	if (*endp || *value > max)
1077 		return -EINVAL;
1078 
1079 	return 0;
1080 }
1081 
1082 static void tpacpi_disable_brightness_delay(void)
1083 {
1084 	if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1085 		pr_notice("ACPI backlight control delay disabled\n");
1086 }
1087 
1088 static void printk_deprecated_attribute(const char * const what,
1089 					const char * const details)
1090 {
1091 	tpacpi_log_usertask("deprecated sysfs attribute");
1092 	pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n",
1093 		what, details);
1094 }
1095 
1096 /*************************************************************************
1097  * rfkill and radio control support helpers
1098  */
1099 
1100 /*
1101  * ThinkPad-ACPI firmware handling model:
1102  *
1103  * WLSW (master wireless switch) is event-driven, and is common to all
1104  * firmware-controlled radios.  It cannot be controlled, just monitored,
1105  * as expected.  It overrides all radio state in firmware
1106  *
1107  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1108  * (TODO: verify how WLSW interacts with the returned radio state).
1109  *
1110  * The only time there are shadow radio state changes, is when
1111  * masked-off hotkeys are used.
1112  */
1113 
1114 /*
1115  * Internal driver API for radio state:
1116  *
1117  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1118  * bool: true means radio blocked (off)
1119  */
1120 enum tpacpi_rfkill_state {
1121 	TPACPI_RFK_RADIO_OFF = 0,
1122 	TPACPI_RFK_RADIO_ON
1123 };
1124 
1125 /* rfkill switches */
1126 enum tpacpi_rfk_id {
1127 	TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1128 	TPACPI_RFK_WWAN_SW_ID,
1129 	TPACPI_RFK_UWB_SW_ID,
1130 	TPACPI_RFK_SW_MAX
1131 };
1132 
1133 static const char *tpacpi_rfkill_names[] = {
1134 	[TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1135 	[TPACPI_RFK_WWAN_SW_ID] = "wwan",
1136 	[TPACPI_RFK_UWB_SW_ID] = "uwb",
1137 	[TPACPI_RFK_SW_MAX] = NULL
1138 };
1139 
1140 /* ThinkPad-ACPI rfkill subdriver */
1141 struct tpacpi_rfk {
1142 	struct rfkill *rfkill;
1143 	enum tpacpi_rfk_id id;
1144 	const struct tpacpi_rfk_ops *ops;
1145 };
1146 
1147 struct tpacpi_rfk_ops {
1148 	/* firmware interface */
1149 	int (*get_status)(void);
1150 	int (*set_status)(const enum tpacpi_rfkill_state);
1151 };
1152 
1153 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1154 
1155 /* Query FW and update rfkill sw state for a given rfkill switch */
1156 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1157 {
1158 	int status;
1159 
1160 	if (!tp_rfk)
1161 		return -ENODEV;
1162 
1163 	status = (tp_rfk->ops->get_status)();
1164 	if (status < 0)
1165 		return status;
1166 
1167 	rfkill_set_sw_state(tp_rfk->rfkill,
1168 			    (status == TPACPI_RFK_RADIO_OFF));
1169 
1170 	return status;
1171 }
1172 
1173 /* Query FW and update rfkill sw state for all rfkill switches */
1174 static void tpacpi_rfk_update_swstate_all(void)
1175 {
1176 	unsigned int i;
1177 
1178 	for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1179 		tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1180 }
1181 
1182 /*
1183  * Sync the HW-blocking state of all rfkill switches,
1184  * do notice it causes the rfkill core to schedule uevents
1185  */
1186 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1187 {
1188 	unsigned int i;
1189 	struct tpacpi_rfk *tp_rfk;
1190 
1191 	for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1192 		tp_rfk = tpacpi_rfkill_switches[i];
1193 		if (tp_rfk) {
1194 			if (rfkill_set_hw_state(tp_rfk->rfkill,
1195 						blocked)) {
1196 				/* ignore -- we track sw block */
1197 			}
1198 		}
1199 	}
1200 }
1201 
1202 /* Call to get the WLSW state from the firmware */
1203 static int hotkey_get_wlsw(void);
1204 
1205 /* Call to query WLSW state and update all rfkill switches */
1206 static bool tpacpi_rfk_check_hwblock_state(void)
1207 {
1208 	int res = hotkey_get_wlsw();
1209 	int hw_blocked;
1210 
1211 	/* When unknown or unsupported, we have to assume it is unblocked */
1212 	if (res < 0)
1213 		return false;
1214 
1215 	hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1216 	tpacpi_rfk_update_hwblock_state(hw_blocked);
1217 
1218 	return hw_blocked;
1219 }
1220 
1221 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1222 {
1223 	struct tpacpi_rfk *tp_rfk = data;
1224 	int res;
1225 
1226 	dbg_printk(TPACPI_DBG_RFKILL,
1227 		   "request to change radio state to %s\n",
1228 		   blocked ? "blocked" : "unblocked");
1229 
1230 	/* try to set radio state */
1231 	res = (tp_rfk->ops->set_status)(blocked ?
1232 				TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1233 
1234 	/* and update the rfkill core with whatever the FW really did */
1235 	tpacpi_rfk_update_swstate(tp_rfk);
1236 
1237 	return (res < 0) ? res : 0;
1238 }
1239 
1240 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1241 	.set_block = tpacpi_rfk_hook_set_block,
1242 };
1243 
1244 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1245 			const struct tpacpi_rfk_ops *tp_rfkops,
1246 			const enum rfkill_type rfktype,
1247 			const char *name,
1248 			const bool set_default)
1249 {
1250 	struct tpacpi_rfk *atp_rfk;
1251 	int res;
1252 	bool sw_state = false;
1253 	bool hw_state;
1254 	int sw_status;
1255 
1256 	BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1257 
1258 	atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1259 	if (atp_rfk)
1260 		atp_rfk->rfkill = rfkill_alloc(name,
1261 						&tpacpi_pdev->dev,
1262 						rfktype,
1263 						&tpacpi_rfk_rfkill_ops,
1264 						atp_rfk);
1265 	if (!atp_rfk || !atp_rfk->rfkill) {
1266 		pr_err("failed to allocate memory for rfkill class\n");
1267 		kfree(atp_rfk);
1268 		return -ENOMEM;
1269 	}
1270 
1271 	atp_rfk->id = id;
1272 	atp_rfk->ops = tp_rfkops;
1273 
1274 	sw_status = (tp_rfkops->get_status)();
1275 	if (sw_status < 0) {
1276 		pr_err("failed to read initial state for %s, error %d\n",
1277 		       name, sw_status);
1278 	} else {
1279 		sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1280 		if (set_default) {
1281 			/* try to keep the initial state, since we ask the
1282 			 * firmware to preserve it across S5 in NVRAM */
1283 			rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1284 		}
1285 	}
1286 	hw_state = tpacpi_rfk_check_hwblock_state();
1287 	rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1288 
1289 	res = rfkill_register(atp_rfk->rfkill);
1290 	if (res < 0) {
1291 		pr_err("failed to register %s rfkill switch: %d\n", name, res);
1292 		rfkill_destroy(atp_rfk->rfkill);
1293 		kfree(atp_rfk);
1294 		return res;
1295 	}
1296 
1297 	tpacpi_rfkill_switches[id] = atp_rfk;
1298 
1299 	pr_info("rfkill switch %s: radio is %sblocked\n",
1300 		name, (sw_state || hw_state) ? "" : "un");
1301 	return 0;
1302 }
1303 
1304 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1305 {
1306 	struct tpacpi_rfk *tp_rfk;
1307 
1308 	BUG_ON(id >= TPACPI_RFK_SW_MAX);
1309 
1310 	tp_rfk = tpacpi_rfkill_switches[id];
1311 	if (tp_rfk) {
1312 		rfkill_unregister(tp_rfk->rfkill);
1313 		rfkill_destroy(tp_rfk->rfkill);
1314 		tpacpi_rfkill_switches[id] = NULL;
1315 		kfree(tp_rfk);
1316 	}
1317 }
1318 
1319 static void printk_deprecated_rfkill_attribute(const char * const what)
1320 {
1321 	printk_deprecated_attribute(what,
1322 			"Please switch to generic rfkill before year 2010");
1323 }
1324 
1325 /* sysfs <radio> enable ------------------------------------------------ */
1326 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1327 					    struct device_attribute *attr,
1328 					    char *buf)
1329 {
1330 	int status;
1331 
1332 	printk_deprecated_rfkill_attribute(attr->attr.name);
1333 
1334 	/* This is in the ABI... */
1335 	if (tpacpi_rfk_check_hwblock_state()) {
1336 		status = TPACPI_RFK_RADIO_OFF;
1337 	} else {
1338 		status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1339 		if (status < 0)
1340 			return status;
1341 	}
1342 
1343 	return snprintf(buf, PAGE_SIZE, "%d\n",
1344 			(status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1345 }
1346 
1347 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1348 			    struct device_attribute *attr,
1349 			    const char *buf, size_t count)
1350 {
1351 	unsigned long t;
1352 	int res;
1353 
1354 	printk_deprecated_rfkill_attribute(attr->attr.name);
1355 
1356 	if (parse_strtoul(buf, 1, &t))
1357 		return -EINVAL;
1358 
1359 	tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1360 
1361 	/* This is in the ABI... */
1362 	if (tpacpi_rfk_check_hwblock_state() && !!t)
1363 		return -EPERM;
1364 
1365 	res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1366 				TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1367 	tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1368 
1369 	return (res < 0) ? res : count;
1370 }
1371 
1372 /* procfs -------------------------------------------------------------- */
1373 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1374 {
1375 	if (id >= TPACPI_RFK_SW_MAX)
1376 		seq_printf(m, "status:\t\tnot supported\n");
1377 	else {
1378 		int status;
1379 
1380 		/* This is in the ABI... */
1381 		if (tpacpi_rfk_check_hwblock_state()) {
1382 			status = TPACPI_RFK_RADIO_OFF;
1383 		} else {
1384 			status = tpacpi_rfk_update_swstate(
1385 						tpacpi_rfkill_switches[id]);
1386 			if (status < 0)
1387 				return status;
1388 		}
1389 
1390 		seq_printf(m, "status:\t\t%s\n",
1391 				(status == TPACPI_RFK_RADIO_ON) ?
1392 					"enabled" : "disabled");
1393 		seq_printf(m, "commands:\tenable, disable\n");
1394 	}
1395 
1396 	return 0;
1397 }
1398 
1399 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1400 {
1401 	char *cmd;
1402 	int status = -1;
1403 	int res = 0;
1404 
1405 	if (id >= TPACPI_RFK_SW_MAX)
1406 		return -ENODEV;
1407 
1408 	while ((cmd = strsep(&buf, ","))) {
1409 		if (strlencmp(cmd, "enable") == 0)
1410 			status = TPACPI_RFK_RADIO_ON;
1411 		else if (strlencmp(cmd, "disable") == 0)
1412 			status = TPACPI_RFK_RADIO_OFF;
1413 		else
1414 			return -EINVAL;
1415 	}
1416 
1417 	if (status != -1) {
1418 		tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1419 				(status == TPACPI_RFK_RADIO_ON) ?
1420 						"enable" : "disable",
1421 				tpacpi_rfkill_names[id]);
1422 		res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1423 		tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1424 	}
1425 
1426 	return res;
1427 }
1428 
1429 /*************************************************************************
1430  * thinkpad-acpi driver attributes
1431  */
1432 
1433 /* interface_version --------------------------------------------------- */
1434 static ssize_t interface_version_show(struct device_driver *drv, char *buf)
1435 {
1436 	return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1437 }
1438 static DRIVER_ATTR_RO(interface_version);
1439 
1440 /* debug_level --------------------------------------------------------- */
1441 static ssize_t debug_level_show(struct device_driver *drv, char *buf)
1442 {
1443 	return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1444 }
1445 
1446 static ssize_t debug_level_store(struct device_driver *drv, const char *buf,
1447 				 size_t count)
1448 {
1449 	unsigned long t;
1450 
1451 	if (parse_strtoul(buf, 0xffff, &t))
1452 		return -EINVAL;
1453 
1454 	dbg_level = t;
1455 
1456 	return count;
1457 }
1458 static DRIVER_ATTR_RW(debug_level);
1459 
1460 /* version ------------------------------------------------------------- */
1461 static ssize_t version_show(struct device_driver *drv, char *buf)
1462 {
1463 	return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1464 			TPACPI_DESC, TPACPI_VERSION);
1465 }
1466 static DRIVER_ATTR_RO(version);
1467 
1468 /* --------------------------------------------------------------------- */
1469 
1470 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1471 
1472 /* wlsw_emulstate ------------------------------------------------------ */
1473 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf)
1474 {
1475 	return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1476 }
1477 
1478 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf,
1479 				    size_t count)
1480 {
1481 	unsigned long t;
1482 
1483 	if (parse_strtoul(buf, 1, &t))
1484 		return -EINVAL;
1485 
1486 	if (tpacpi_wlsw_emulstate != !!t) {
1487 		tpacpi_wlsw_emulstate = !!t;
1488 		tpacpi_rfk_update_hwblock_state(!t);	/* negative logic */
1489 	}
1490 
1491 	return count;
1492 }
1493 static DRIVER_ATTR_RW(wlsw_emulstate);
1494 
1495 /* bluetooth_emulstate ------------------------------------------------- */
1496 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf)
1497 {
1498 	return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1499 }
1500 
1501 static ssize_t bluetooth_emulstate_store(struct device_driver *drv,
1502 					 const char *buf, size_t count)
1503 {
1504 	unsigned long t;
1505 
1506 	if (parse_strtoul(buf, 1, &t))
1507 		return -EINVAL;
1508 
1509 	tpacpi_bluetooth_emulstate = !!t;
1510 
1511 	return count;
1512 }
1513 static DRIVER_ATTR_RW(bluetooth_emulstate);
1514 
1515 /* wwan_emulstate ------------------------------------------------- */
1516 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf)
1517 {
1518 	return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1519 }
1520 
1521 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf,
1522 				    size_t count)
1523 {
1524 	unsigned long t;
1525 
1526 	if (parse_strtoul(buf, 1, &t))
1527 		return -EINVAL;
1528 
1529 	tpacpi_wwan_emulstate = !!t;
1530 
1531 	return count;
1532 }
1533 static DRIVER_ATTR_RW(wwan_emulstate);
1534 
1535 /* uwb_emulstate ------------------------------------------------- */
1536 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf)
1537 {
1538 	return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1539 }
1540 
1541 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf,
1542 				   size_t count)
1543 {
1544 	unsigned long t;
1545 
1546 	if (parse_strtoul(buf, 1, &t))
1547 		return -EINVAL;
1548 
1549 	tpacpi_uwb_emulstate = !!t;
1550 
1551 	return count;
1552 }
1553 static DRIVER_ATTR_RW(uwb_emulstate);
1554 #endif
1555 
1556 /* --------------------------------------------------------------------- */
1557 
1558 static struct driver_attribute *tpacpi_driver_attributes[] = {
1559 	&driver_attr_debug_level, &driver_attr_version,
1560 	&driver_attr_interface_version,
1561 };
1562 
1563 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1564 {
1565 	int i, res;
1566 
1567 	i = 0;
1568 	res = 0;
1569 	while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1570 		res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1571 		i++;
1572 	}
1573 
1574 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1575 	if (!res && dbg_wlswemul)
1576 		res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1577 	if (!res && dbg_bluetoothemul)
1578 		res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1579 	if (!res && dbg_wwanemul)
1580 		res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1581 	if (!res && dbg_uwbemul)
1582 		res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1583 #endif
1584 
1585 	return res;
1586 }
1587 
1588 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1589 {
1590 	int i;
1591 
1592 	for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1593 		driver_remove_file(drv, tpacpi_driver_attributes[i]);
1594 
1595 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1596 	driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1597 	driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1598 	driver_remove_file(drv, &driver_attr_wwan_emulstate);
1599 	driver_remove_file(drv, &driver_attr_uwb_emulstate);
1600 #endif
1601 }
1602 
1603 /*************************************************************************
1604  * Firmware Data
1605  */
1606 
1607 /*
1608  * Table of recommended minimum BIOS versions
1609  *
1610  * Reasons for listing:
1611  *    1. Stable BIOS, listed because the unknown amount of
1612  *       bugs and bad ACPI behaviour on older versions
1613  *
1614  *    2. BIOS or EC fw with known bugs that trigger on Linux
1615  *
1616  *    3. BIOS with known reduced functionality in older versions
1617  *
1618  *  We recommend the latest BIOS and EC version.
1619  *  We only support the latest BIOS and EC fw version as a rule.
1620  *
1621  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1622  *  Information from users in ThinkWiki
1623  *
1624  *  WARNING: we use this table also to detect that the machine is
1625  *  a ThinkPad in some cases, so don't remove entries lightly.
1626  */
1627 
1628 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)		\
1629 	{ .vendor	= (__v),			\
1630 	  .bios		= TPID(__id1, __id2),		\
1631 	  .ec		= TPACPI_MATCH_ANY,		\
1632 	  .quirks	= TPACPI_MATCH_ANY_VERSION << 16 \
1633 			  | TPVER(__bv1, __bv2) }
1634 
1635 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,	\
1636 		__eid, __ev1, __ev2)			\
1637 	{ .vendor	= (__v),			\
1638 	  .bios		= TPID(__bid1, __bid2),		\
1639 	  .ec		= __eid,			\
1640 	  .quirks	= TPVER(__ev1, __ev2) << 16	\
1641 			  | TPVER(__bv1, __bv2) }
1642 
1643 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1644 	TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1645 
1646 /* Outdated IBM BIOSes often lack the EC id string */
1647 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1648 	TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, 	\
1649 		__bv1, __bv2, TPID(__id1, __id2),	\
1650 		__ev1, __ev2),				\
1651 	TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, 	\
1652 		__bv1, __bv2, TPACPI_MATCH_UNKNOWN,	\
1653 		__ev1, __ev2)
1654 
1655 /* Outdated IBM BIOSes often lack the EC id string */
1656 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,		\
1657 		__eid1, __eid2, __ev1, __ev2) 		\
1658 	TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, 	\
1659 		__bv1, __bv2, TPID(__eid1, __eid2),	\
1660 		__ev1, __ev2),				\
1661 	TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, 	\
1662 		__bv1, __bv2, TPACPI_MATCH_UNKNOWN,	\
1663 		__ev1, __ev2)
1664 
1665 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1666 	TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1667 
1668 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1669 	TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, 	\
1670 		__bv1, __bv2, TPID(__id1, __id2),	\
1671 		__ev1, __ev2)
1672 
1673 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,		\
1674 		__eid1, __eid2, __ev1, __ev2) 		\
1675 	TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, 	\
1676 		__bv1, __bv2, TPID(__eid1, __eid2),	\
1677 		__ev1, __ev2)
1678 
1679 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1680 	/*  Numeric models ------------------ */
1681 	/*      FW MODEL   BIOS VERS	      */
1682 	TPV_QI0('I', 'M',  '6', '5'),		 /* 570 */
1683 	TPV_QI0('I', 'U',  '2', '6'),		 /* 570E */
1684 	TPV_QI0('I', 'B',  '5', '4'),		 /* 600 */
1685 	TPV_QI0('I', 'H',  '4', '7'),		 /* 600E */
1686 	TPV_QI0('I', 'N',  '3', '6'),		 /* 600E */
1687 	TPV_QI0('I', 'T',  '5', '5'),		 /* 600X */
1688 	TPV_QI0('I', 'D',  '4', '8'),		 /* 770, 770E, 770ED */
1689 	TPV_QI0('I', 'I',  '4', '2'),		 /* 770X */
1690 	TPV_QI0('I', 'O',  '2', '3'),		 /* 770Z */
1691 
1692 	/* A-series ------------------------- */
1693 	/*      FW MODEL   BIOS VERS  EC VERS */
1694 	TPV_QI0('I', 'W',  '5', '9'),		 /* A20m */
1695 	TPV_QI0('I', 'V',  '6', '9'),		 /* A20p */
1696 	TPV_QI0('1', '0',  '2', '6'),		 /* A21e, A22e */
1697 	TPV_QI0('K', 'U',  '3', '6'),		 /* A21e */
1698 	TPV_QI0('K', 'X',  '3', '6'),		 /* A21m, A22m */
1699 	TPV_QI0('K', 'Y',  '3', '8'),		 /* A21p, A22p */
1700 	TPV_QI0('1', 'B',  '1', '7'),		 /* A22e */
1701 	TPV_QI0('1', '3',  '2', '0'),		 /* A22m */
1702 	TPV_QI0('1', 'E',  '7', '3'),		 /* A30/p (0) */
1703 	TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1704 	TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1705 
1706 	/* G-series ------------------------- */
1707 	/*      FW MODEL   BIOS VERS	      */
1708 	TPV_QI0('1', 'T',  'A', '6'),		 /* G40 */
1709 	TPV_QI0('1', 'X',  '5', '7'),		 /* G41 */
1710 
1711 	/* R-series, T-series --------------- */
1712 	/*      FW MODEL   BIOS VERS  EC VERS */
1713 	TPV_QI0('1', 'C',  'F', '0'),		 /* R30 */
1714 	TPV_QI0('1', 'F',  'F', '1'),		 /* R31 */
1715 	TPV_QI0('1', 'M',  '9', '7'),		 /* R32 */
1716 	TPV_QI0('1', 'O',  '6', '1'),		 /* R40 */
1717 	TPV_QI0('1', 'P',  '6', '5'),		 /* R40 */
1718 	TPV_QI0('1', 'S',  '7', '0'),		 /* R40e */
1719 	TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1720 						    T40/p, T41/p, T42/p (1) */
1721 	TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1722 	TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1723 	TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1724 	TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1725 
1726 	TPV_QI0('I', 'Y',  '6', '1'),		 /* T20 */
1727 	TPV_QI0('K', 'Z',  '3', '4'),		 /* T21 */
1728 	TPV_QI0('1', '6',  '3', '2'),		 /* T22 */
1729 	TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1730 	TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1731 	TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1732 
1733 	TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1734 	TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1735 	TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1736 
1737 	/*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1738 	TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1739 	TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1740 
1741 	/* X-series ------------------------- */
1742 	/*      FW MODEL   BIOS VERS  EC VERS */
1743 	TPV_QI0('I', 'Z',  '9', 'D'),		 /* X20, X21 */
1744 	TPV_QI0('1', 'D',  '7', '0'),		 /* X22, X23, X24 */
1745 	TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1746 	TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1747 	TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1748 	TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1749 	TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1750 
1751 	TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1752 	TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1753 
1754 	/* (0) - older versions lack DMI EC fw string and functionality */
1755 	/* (1) - older versions known to lack functionality */
1756 };
1757 
1758 #undef TPV_QL1
1759 #undef TPV_QL0
1760 #undef TPV_QI2
1761 #undef TPV_QI1
1762 #undef TPV_QI0
1763 #undef TPV_Q_X
1764 #undef TPV_Q
1765 
1766 static void __init tpacpi_check_outdated_fw(void)
1767 {
1768 	unsigned long fwvers;
1769 	u16 ec_version, bios_version;
1770 
1771 	fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1772 				ARRAY_SIZE(tpacpi_bios_version_qtable));
1773 
1774 	if (!fwvers)
1775 		return;
1776 
1777 	bios_version = fwvers & 0xffffU;
1778 	ec_version = (fwvers >> 16) & 0xffffU;
1779 
1780 	/* note that unknown versions are set to 0x0000 and we use that */
1781 	if ((bios_version > thinkpad_id.bios_release) ||
1782 	    (ec_version > thinkpad_id.ec_release &&
1783 				ec_version != TPACPI_MATCH_ANY_VERSION)) {
1784 		/*
1785 		 * The changelogs would let us track down the exact
1786 		 * reason, but it is just too much of a pain to track
1787 		 * it.  We only list BIOSes that are either really
1788 		 * broken, or really stable to begin with, so it is
1789 		 * best if the user upgrades the firmware anyway.
1790 		 */
1791 		pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1792 		pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n");
1793 	}
1794 }
1795 
1796 static bool __init tpacpi_is_fw_known(void)
1797 {
1798 	return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1799 			ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1800 }
1801 
1802 /****************************************************************************
1803  ****************************************************************************
1804  *
1805  * Subdrivers
1806  *
1807  ****************************************************************************
1808  ****************************************************************************/
1809 
1810 /*************************************************************************
1811  * thinkpad-acpi metadata subdriver
1812  */
1813 
1814 static int thinkpad_acpi_driver_read(struct seq_file *m)
1815 {
1816 	seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1817 	seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1818 	return 0;
1819 }
1820 
1821 static struct ibm_struct thinkpad_acpi_driver_data = {
1822 	.name = "driver",
1823 	.read = thinkpad_acpi_driver_read,
1824 };
1825 
1826 /*************************************************************************
1827  * Hotkey subdriver
1828  */
1829 
1830 /*
1831  * ThinkPad firmware event model
1832  *
1833  * The ThinkPad firmware has two main event interfaces: normal ACPI
1834  * notifications (which follow the ACPI standard), and a private event
1835  * interface.
1836  *
1837  * The private event interface also issues events for the hotkeys.  As
1838  * the driver gained features, the event handling code ended up being
1839  * built around the hotkey subdriver.  This will need to be refactored
1840  * to a more formal event API eventually.
1841  *
1842  * Some "hotkeys" are actually supposed to be used as event reports,
1843  * such as "brightness has changed", "volume has changed", depending on
1844  * the ThinkPad model and how the firmware is operating.
1845  *
1846  * Unlike other classes, hotkey-class events have mask/unmask control on
1847  * non-ancient firmware.  However, how it behaves changes a lot with the
1848  * firmware model and version.
1849  */
1850 
1851 enum {	/* hot key scan codes (derived from ACPI DSDT) */
1852 	TP_ACPI_HOTKEYSCAN_FNF1		= 0,
1853 	TP_ACPI_HOTKEYSCAN_FNF2,
1854 	TP_ACPI_HOTKEYSCAN_FNF3,
1855 	TP_ACPI_HOTKEYSCAN_FNF4,
1856 	TP_ACPI_HOTKEYSCAN_FNF5,
1857 	TP_ACPI_HOTKEYSCAN_FNF6,
1858 	TP_ACPI_HOTKEYSCAN_FNF7,
1859 	TP_ACPI_HOTKEYSCAN_FNF8,
1860 	TP_ACPI_HOTKEYSCAN_FNF9,
1861 	TP_ACPI_HOTKEYSCAN_FNF10,
1862 	TP_ACPI_HOTKEYSCAN_FNF11,
1863 	TP_ACPI_HOTKEYSCAN_FNF12,
1864 	TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1865 	TP_ACPI_HOTKEYSCAN_FNINSERT,
1866 	TP_ACPI_HOTKEYSCAN_FNDELETE,
1867 	TP_ACPI_HOTKEYSCAN_FNHOME,
1868 	TP_ACPI_HOTKEYSCAN_FNEND,
1869 	TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1870 	TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1871 	TP_ACPI_HOTKEYSCAN_FNSPACE,
1872 	TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1873 	TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1874 	TP_ACPI_HOTKEYSCAN_MUTE,
1875 	TP_ACPI_HOTKEYSCAN_THINKPAD,
1876 	TP_ACPI_HOTKEYSCAN_UNK1,
1877 	TP_ACPI_HOTKEYSCAN_UNK2,
1878 	TP_ACPI_HOTKEYSCAN_UNK3,
1879 	TP_ACPI_HOTKEYSCAN_UNK4,
1880 	TP_ACPI_HOTKEYSCAN_UNK5,
1881 	TP_ACPI_HOTKEYSCAN_UNK6,
1882 	TP_ACPI_HOTKEYSCAN_UNK7,
1883 	TP_ACPI_HOTKEYSCAN_UNK8,
1884 
1885 	/* Adaptive keyboard keycodes */
1886 	TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1887 	TP_ACPI_HOTKEYSCAN_MUTE2        = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1888 	TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO,
1889 	TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL,
1890 	TP_ACPI_HOTKEYSCAN_CLOUD,
1891 	TP_ACPI_HOTKEYSCAN_UNK9,
1892 	TP_ACPI_HOTKEYSCAN_VOICE,
1893 	TP_ACPI_HOTKEYSCAN_UNK10,
1894 	TP_ACPI_HOTKEYSCAN_GESTURES,
1895 	TP_ACPI_HOTKEYSCAN_UNK11,
1896 	TP_ACPI_HOTKEYSCAN_UNK12,
1897 	TP_ACPI_HOTKEYSCAN_UNK13,
1898 	TP_ACPI_HOTKEYSCAN_CONFIG,
1899 	TP_ACPI_HOTKEYSCAN_NEW_TAB,
1900 	TP_ACPI_HOTKEYSCAN_RELOAD,
1901 	TP_ACPI_HOTKEYSCAN_BACK,
1902 	TP_ACPI_HOTKEYSCAN_MIC_DOWN,
1903 	TP_ACPI_HOTKEYSCAN_MIC_UP,
1904 	TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION,
1905 	TP_ACPI_HOTKEYSCAN_CAMERA_MODE,
1906 	TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY,
1907 
1908 	/* Lenovo extended keymap, starting at 0x1300 */
1909 	TP_ACPI_HOTKEYSCAN_EXTENDED_START,
1910 	/* first new observed key (star, favorites) is 0x1311 */
1911 	TP_ACPI_HOTKEYSCAN_STAR = 69,
1912 	TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2,
1913 	TP_ACPI_HOTKEYSCAN_CALCULATOR,
1914 	TP_ACPI_HOTKEYSCAN_BLUETOOTH,
1915 	TP_ACPI_HOTKEYSCAN_KEYBOARD,
1916 	TP_ACPI_HOTKEYSCAN_FN_RIGHT_SHIFT, /* Used by "Lenovo Quick Clean" */
1917 	TP_ACPI_HOTKEYSCAN_NOTIFICATION_CENTER,
1918 	TP_ACPI_HOTKEYSCAN_PICKUP_PHONE,
1919 	TP_ACPI_HOTKEYSCAN_HANGUP_PHONE,
1920 
1921 	/* Hotkey keymap size */
1922 	TPACPI_HOTKEY_MAP_LEN
1923 };
1924 
1925 enum {	/* Keys/events available through NVRAM polling */
1926 	TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1927 	TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1928 };
1929 
1930 enum {	/* Positions of some of the keys in hotkey masks */
1931 	TP_ACPI_HKEY_DISPSWTCH_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1932 	TP_ACPI_HKEY_DISPXPAND_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1933 	TP_ACPI_HKEY_HIBERNATE_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1934 	TP_ACPI_HKEY_BRGHTUP_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1935 	TP_ACPI_HKEY_BRGHTDWN_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1936 	TP_ACPI_HKEY_KBD_LIGHT_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1937 	TP_ACPI_HKEY_ZOOM_MASK		= 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1938 	TP_ACPI_HKEY_VOLUP_MASK		= 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1939 	TP_ACPI_HKEY_VOLDWN_MASK	= 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1940 	TP_ACPI_HKEY_MUTE_MASK		= 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1941 	TP_ACPI_HKEY_THINKPAD_MASK	= 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1942 };
1943 
1944 enum {	/* NVRAM to ACPI HKEY group map */
1945 	TP_NVRAM_HKEY_GROUP_HK2		= TP_ACPI_HKEY_THINKPAD_MASK |
1946 					  TP_ACPI_HKEY_ZOOM_MASK |
1947 					  TP_ACPI_HKEY_DISPSWTCH_MASK |
1948 					  TP_ACPI_HKEY_HIBERNATE_MASK,
1949 	TP_NVRAM_HKEY_GROUP_BRIGHTNESS	= TP_ACPI_HKEY_BRGHTUP_MASK |
1950 					  TP_ACPI_HKEY_BRGHTDWN_MASK,
1951 	TP_NVRAM_HKEY_GROUP_VOLUME	= TP_ACPI_HKEY_VOLUP_MASK |
1952 					  TP_ACPI_HKEY_VOLDWN_MASK |
1953 					  TP_ACPI_HKEY_MUTE_MASK,
1954 };
1955 
1956 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1957 struct tp_nvram_state {
1958        u16 thinkpad_toggle:1;
1959        u16 zoom_toggle:1;
1960        u16 display_toggle:1;
1961        u16 thinklight_toggle:1;
1962        u16 hibernate_toggle:1;
1963        u16 displayexp_toggle:1;
1964        u16 display_state:1;
1965        u16 brightness_toggle:1;
1966        u16 volume_toggle:1;
1967        u16 mute:1;
1968 
1969        u8 brightness_level;
1970        u8 volume_level;
1971 };
1972 
1973 /* kthread for the hotkey poller */
1974 static struct task_struct *tpacpi_hotkey_task;
1975 
1976 /*
1977  * Acquire mutex to write poller control variables as an
1978  * atomic block.
1979  *
1980  * Increment hotkey_config_change when changing them if you
1981  * want the kthread to forget old state.
1982  *
1983  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1984  */
1985 static struct mutex hotkey_thread_data_mutex;
1986 static unsigned int hotkey_config_change;
1987 
1988 /*
1989  * hotkey poller control variables
1990  *
1991  * Must be atomic or readers will also need to acquire mutex
1992  *
1993  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1994  * should be used only when the changes need to be taken as
1995  * a block, OR when one needs to force the kthread to forget
1996  * old state.
1997  */
1998 static u32 hotkey_source_mask;		/* bit mask 0=ACPI,1=NVRAM */
1999 static unsigned int hotkey_poll_freq = 10; /* Hz */
2000 
2001 #define HOTKEY_CONFIG_CRITICAL_START \
2002 	do { \
2003 		mutex_lock(&hotkey_thread_data_mutex); \
2004 		hotkey_config_change++; \
2005 	} while (0);
2006 #define HOTKEY_CONFIG_CRITICAL_END \
2007 	mutex_unlock(&hotkey_thread_data_mutex);
2008 
2009 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2010 
2011 #define hotkey_source_mask 0U
2012 #define HOTKEY_CONFIG_CRITICAL_START
2013 #define HOTKEY_CONFIG_CRITICAL_END
2014 
2015 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2016 
2017 static struct mutex hotkey_mutex;
2018 
2019 static enum {	/* Reasons for waking up */
2020 	TP_ACPI_WAKEUP_NONE = 0,	/* None or unknown */
2021 	TP_ACPI_WAKEUP_BAYEJ,		/* Bay ejection request */
2022 	TP_ACPI_WAKEUP_UNDOCK,		/* Undock request */
2023 } hotkey_wakeup_reason;
2024 
2025 static int hotkey_autosleep_ack;
2026 
2027 static u32 hotkey_orig_mask;		/* events the BIOS had enabled */
2028 static u32 hotkey_all_mask;		/* all events supported in fw */
2029 static u32 hotkey_adaptive_all_mask;	/* all adaptive events supported in fw */
2030 static u32 hotkey_reserved_mask;	/* events better left disabled */
2031 static u32 hotkey_driver_mask;		/* events needed by the driver */
2032 static u32 hotkey_user_mask;		/* events visible to userspace */
2033 static u32 hotkey_acpi_mask;		/* events enabled in firmware */
2034 
2035 static u16 *hotkey_keycode_map;
2036 
2037 static struct attribute_set *hotkey_dev_attributes;
2038 
2039 static void tpacpi_driver_event(const unsigned int hkey_event);
2040 static void hotkey_driver_event(const unsigned int scancode);
2041 static void hotkey_poll_setup(const bool may_warn);
2042 
2043 /* HKEY.MHKG() return bits */
2044 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2045 enum {
2046 	TP_ACPI_MULTI_MODE_INVALID	= 0,
2047 	TP_ACPI_MULTI_MODE_UNKNOWN	= 1 << 0,
2048 	TP_ACPI_MULTI_MODE_LAPTOP	= 1 << 1,
2049 	TP_ACPI_MULTI_MODE_TABLET	= 1 << 2,
2050 	TP_ACPI_MULTI_MODE_FLAT		= 1 << 3,
2051 	TP_ACPI_MULTI_MODE_STAND	= 1 << 4,
2052 	TP_ACPI_MULTI_MODE_TENT		= 1 << 5,
2053 	TP_ACPI_MULTI_MODE_STAND_TENT	= 1 << 6,
2054 };
2055 
2056 enum {
2057 	/* The following modes are considered tablet mode for the purpose of
2058 	 * reporting the status to userspace. i.e. in all these modes it makes
2059 	 * sense to disable the laptop input devices such as touchpad and
2060 	 * keyboard.
2061 	 */
2062 	TP_ACPI_MULTI_MODE_TABLET_LIKE	= TP_ACPI_MULTI_MODE_TABLET |
2063 					  TP_ACPI_MULTI_MODE_STAND |
2064 					  TP_ACPI_MULTI_MODE_TENT |
2065 					  TP_ACPI_MULTI_MODE_STAND_TENT,
2066 };
2067 
2068 static int hotkey_get_wlsw(void)
2069 {
2070 	int status;
2071 
2072 	if (!tp_features.hotkey_wlsw)
2073 		return -ENODEV;
2074 
2075 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2076 	if (dbg_wlswemul)
2077 		return (tpacpi_wlsw_emulstate) ?
2078 				TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2079 #endif
2080 
2081 	if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2082 		return -EIO;
2083 
2084 	return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2085 }
2086 
2087 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode)
2088 {
2089 	int type = (s >> 16) & 0xffff;
2090 	int value = s & 0xffff;
2091 	int mode = TP_ACPI_MULTI_MODE_INVALID;
2092 	int valid_modes = 0;
2093 
2094 	if (has_tablet_mode)
2095 		*has_tablet_mode = 0;
2096 
2097 	switch (type) {
2098 	case 1:
2099 		valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2100 			      TP_ACPI_MULTI_MODE_TABLET |
2101 			      TP_ACPI_MULTI_MODE_STAND_TENT;
2102 		break;
2103 	case 2:
2104 		valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2105 			      TP_ACPI_MULTI_MODE_FLAT |
2106 			      TP_ACPI_MULTI_MODE_TABLET |
2107 			      TP_ACPI_MULTI_MODE_STAND |
2108 			      TP_ACPI_MULTI_MODE_TENT;
2109 		break;
2110 	case 3:
2111 		valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2112 			      TP_ACPI_MULTI_MODE_FLAT;
2113 		break;
2114 	case 4:
2115 	case 5:
2116 		/* In mode 4, FLAT is not specified as a valid mode. However,
2117 		 * it can be seen at least on the X1 Yoga 2nd Generation.
2118 		 */
2119 		valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2120 			      TP_ACPI_MULTI_MODE_FLAT |
2121 			      TP_ACPI_MULTI_MODE_TABLET |
2122 			      TP_ACPI_MULTI_MODE_STAND |
2123 			      TP_ACPI_MULTI_MODE_TENT;
2124 		break;
2125 	default:
2126 		pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n",
2127 		       type, value, TPACPI_MAIL);
2128 		return 0;
2129 	}
2130 
2131 	if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE))
2132 		*has_tablet_mode = 1;
2133 
2134 	switch (value) {
2135 	case 1:
2136 		mode = TP_ACPI_MULTI_MODE_LAPTOP;
2137 		break;
2138 	case 2:
2139 		mode = TP_ACPI_MULTI_MODE_FLAT;
2140 		break;
2141 	case 3:
2142 		mode = TP_ACPI_MULTI_MODE_TABLET;
2143 		break;
2144 	case 4:
2145 		if (type == 1)
2146 			mode = TP_ACPI_MULTI_MODE_STAND_TENT;
2147 		else
2148 			mode = TP_ACPI_MULTI_MODE_STAND;
2149 		break;
2150 	case 5:
2151 		mode = TP_ACPI_MULTI_MODE_TENT;
2152 		break;
2153 	default:
2154 		if (type == 5 && value == 0xffff) {
2155 			pr_warn("Multi mode status is undetected, assuming laptop\n");
2156 			return 0;
2157 		}
2158 	}
2159 
2160 	if (!(mode & valid_modes)) {
2161 		pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n",
2162 		       value, type, TPACPI_MAIL);
2163 		return 0;
2164 	}
2165 
2166 	return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE);
2167 }
2168 
2169 static int hotkey_get_tablet_mode(int *status)
2170 {
2171 	int s;
2172 
2173 	switch (tp_features.hotkey_tablet) {
2174 	case TP_HOTKEY_TABLET_USES_MHKG:
2175 		if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2176 			return -EIO;
2177 
2178 		*status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2179 		break;
2180 	case TP_HOTKEY_TABLET_USES_GMMS:
2181 		if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0))
2182 			return -EIO;
2183 
2184 		*status = hotkey_gmms_get_tablet_mode(s, NULL);
2185 		break;
2186 	default:
2187 		break;
2188 	}
2189 
2190 	return 0;
2191 }
2192 
2193 /*
2194  * Reads current event mask from firmware, and updates
2195  * hotkey_acpi_mask accordingly.  Also resets any bits
2196  * from hotkey_user_mask that are unavailable to be
2197  * delivered (shadow requirement of the userspace ABI).
2198  *
2199  * Call with hotkey_mutex held
2200  */
2201 static int hotkey_mask_get(void)
2202 {
2203 	if (tp_features.hotkey_mask) {
2204 		u32 m = 0;
2205 
2206 		if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2207 			return -EIO;
2208 
2209 		hotkey_acpi_mask = m;
2210 	} else {
2211 		/* no mask support doesn't mean no event support... */
2212 		hotkey_acpi_mask = hotkey_all_mask;
2213 	}
2214 
2215 	/* sync userspace-visible mask */
2216 	hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2217 
2218 	return 0;
2219 }
2220 
2221 static void hotkey_mask_warn_incomplete_mask(void)
2222 {
2223 	/* log only what the user can fix... */
2224 	const u32 wantedmask = hotkey_driver_mask &
2225 		~(hotkey_acpi_mask | hotkey_source_mask) &
2226 		(hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2227 
2228 	if (wantedmask)
2229 		pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2230 }
2231 
2232 /*
2233  * Set the firmware mask when supported
2234  *
2235  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2236  *
2237  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2238  *
2239  * Call with hotkey_mutex held
2240  */
2241 static int hotkey_mask_set(u32 mask)
2242 {
2243 	int i;
2244 	int rc = 0;
2245 
2246 	const u32 fwmask = mask & ~hotkey_source_mask;
2247 
2248 	if (tp_features.hotkey_mask) {
2249 		for (i = 0; i < 32; i++) {
2250 			if (!acpi_evalf(hkey_handle,
2251 					NULL, "MHKM", "vdd", i + 1,
2252 					!!(mask & (1 << i)))) {
2253 				rc = -EIO;
2254 				break;
2255 			}
2256 		}
2257 	}
2258 
2259 	/*
2260 	 * We *must* make an inconditional call to hotkey_mask_get to
2261 	 * refresh hotkey_acpi_mask and update hotkey_user_mask
2262 	 *
2263 	 * Take the opportunity to also log when we cannot _enable_
2264 	 * a given event.
2265 	 */
2266 	if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2267 		pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n",
2268 			  fwmask, hotkey_acpi_mask);
2269 	}
2270 
2271 	if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2272 		hotkey_mask_warn_incomplete_mask();
2273 
2274 	return rc;
2275 }
2276 
2277 /*
2278  * Sets hotkey_user_mask and tries to set the firmware mask
2279  *
2280  * Call with hotkey_mutex held
2281  */
2282 static int hotkey_user_mask_set(const u32 mask)
2283 {
2284 	int rc;
2285 
2286 	/* Give people a chance to notice they are doing something that
2287 	 * is bound to go boom on their users sooner or later */
2288 	if (!tp_warned.hotkey_mask_ff &&
2289 	    (mask == 0xffff || mask == 0xffffff ||
2290 	     mask == 0xffffffff)) {
2291 		tp_warned.hotkey_mask_ff = 1;
2292 		pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n",
2293 			  mask);
2294 		pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n");
2295 	}
2296 
2297 	/* Try to enable what the user asked for, plus whatever we need.
2298 	 * this syncs everything but won't enable bits in hotkey_user_mask */
2299 	rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2300 
2301 	/* Enable the available bits in hotkey_user_mask */
2302 	hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2303 
2304 	return rc;
2305 }
2306 
2307 /*
2308  * Sets the driver hotkey mask.
2309  *
2310  * Can be called even if the hotkey subdriver is inactive
2311  */
2312 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2313 {
2314 	int rc;
2315 
2316 	/* Do the right thing if hotkey_init has not been called yet */
2317 	if (!tp_features.hotkey) {
2318 		hotkey_driver_mask = mask;
2319 		return 0;
2320 	}
2321 
2322 	mutex_lock(&hotkey_mutex);
2323 
2324 	HOTKEY_CONFIG_CRITICAL_START
2325 	hotkey_driver_mask = mask;
2326 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2327 	hotkey_source_mask |= (mask & ~hotkey_all_mask);
2328 #endif
2329 	HOTKEY_CONFIG_CRITICAL_END
2330 
2331 	rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2332 							~hotkey_source_mask);
2333 	hotkey_poll_setup(true);
2334 
2335 	mutex_unlock(&hotkey_mutex);
2336 
2337 	return rc;
2338 }
2339 
2340 static int hotkey_status_get(int *status)
2341 {
2342 	if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2343 		return -EIO;
2344 
2345 	return 0;
2346 }
2347 
2348 static int hotkey_status_set(bool enable)
2349 {
2350 	if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2351 		return -EIO;
2352 
2353 	return 0;
2354 }
2355 
2356 static void tpacpi_input_send_tabletsw(void)
2357 {
2358 	int state;
2359 
2360 	if (tp_features.hotkey_tablet &&
2361 	    !hotkey_get_tablet_mode(&state)) {
2362 		mutex_lock(&tpacpi_inputdev_send_mutex);
2363 
2364 		input_report_switch(tpacpi_inputdev,
2365 				    SW_TABLET_MODE, !!state);
2366 		input_sync(tpacpi_inputdev);
2367 
2368 		mutex_unlock(&tpacpi_inputdev_send_mutex);
2369 	}
2370 }
2371 
2372 /* Do NOT call without validating scancode first */
2373 static void tpacpi_input_send_key(const unsigned int scancode)
2374 {
2375 	const unsigned int keycode = hotkey_keycode_map[scancode];
2376 
2377 	if (keycode != KEY_RESERVED) {
2378 		mutex_lock(&tpacpi_inputdev_send_mutex);
2379 
2380 		input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2381 		input_report_key(tpacpi_inputdev, keycode, 1);
2382 		input_sync(tpacpi_inputdev);
2383 
2384 		input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2385 		input_report_key(tpacpi_inputdev, keycode, 0);
2386 		input_sync(tpacpi_inputdev);
2387 
2388 		mutex_unlock(&tpacpi_inputdev_send_mutex);
2389 	}
2390 }
2391 
2392 /* Do NOT call without validating scancode first */
2393 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2394 {
2395 	hotkey_driver_event(scancode);
2396 	if (hotkey_user_mask & (1 << scancode))
2397 		tpacpi_input_send_key(scancode);
2398 }
2399 
2400 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2401 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2402 
2403 /* Do NOT call without validating scancode first */
2404 static void tpacpi_hotkey_send_key(unsigned int scancode)
2405 {
2406 	tpacpi_input_send_key_masked(scancode);
2407 }
2408 
2409 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2410 {
2411 	u8 d;
2412 
2413 	if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2414 		d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2415 		n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2416 		n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2417 		n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2418 		n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2419 	}
2420 	if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) {
2421 		d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2422 		n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2423 	}
2424 	if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2425 		d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2426 		n->displayexp_toggle =
2427 				!!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2428 	}
2429 	if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2430 		d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2431 		n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2432 				>> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2433 		n->brightness_toggle =
2434 				!!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2435 	}
2436 	if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2437 		d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2438 		n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2439 				>> TP_NVRAM_POS_LEVEL_VOLUME;
2440 		n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2441 		n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2442 	}
2443 }
2444 
2445 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2446 do { \
2447 	if ((event_mask & (1 << __scancode)) && \
2448 	    oldn->__member != newn->__member) \
2449 		tpacpi_hotkey_send_key(__scancode); \
2450 } while (0)
2451 
2452 #define TPACPI_MAY_SEND_KEY(__scancode) \
2453 do { \
2454 	if (event_mask & (1 << __scancode)) \
2455 		tpacpi_hotkey_send_key(__scancode); \
2456 } while (0)
2457 
2458 static void issue_volchange(const unsigned int oldvol,
2459 			    const unsigned int newvol,
2460 			    const u32 event_mask)
2461 {
2462 	unsigned int i = oldvol;
2463 
2464 	while (i > newvol) {
2465 		TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2466 		i--;
2467 	}
2468 	while (i < newvol) {
2469 		TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2470 		i++;
2471 	}
2472 }
2473 
2474 static void issue_brightnesschange(const unsigned int oldbrt,
2475 				   const unsigned int newbrt,
2476 				   const u32 event_mask)
2477 {
2478 	unsigned int i = oldbrt;
2479 
2480 	while (i > newbrt) {
2481 		TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2482 		i--;
2483 	}
2484 	while (i < newbrt) {
2485 		TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2486 		i++;
2487 	}
2488 }
2489 
2490 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2491 					   struct tp_nvram_state *newn,
2492 					   const u32 event_mask)
2493 {
2494 
2495 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2496 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2497 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2498 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2499 
2500 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2501 
2502 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2503 
2504 	/*
2505 	 * Handle volume
2506 	 *
2507 	 * This code is supposed to duplicate the IBM firmware behaviour:
2508 	 * - Pressing MUTE issues mute hotkey message, even when already mute
2509 	 * - Pressing Volume up/down issues volume up/down hotkey messages,
2510 	 *   even when already at maximum or minimum volume
2511 	 * - The act of unmuting issues volume up/down notification,
2512 	 *   depending which key was used to unmute
2513 	 *
2514 	 * We are constrained to what the NVRAM can tell us, which is not much
2515 	 * and certainly not enough if more than one volume hotkey was pressed
2516 	 * since the last poll cycle.
2517 	 *
2518 	 * Just to make our life interesting, some newer Lenovo ThinkPads have
2519 	 * bugs in the BIOS and may fail to update volume_toggle properly.
2520 	 */
2521 	if (newn->mute) {
2522 		/* muted */
2523 		if (!oldn->mute ||
2524 		    oldn->volume_toggle != newn->volume_toggle ||
2525 		    oldn->volume_level != newn->volume_level) {
2526 			/* recently muted, or repeated mute keypress, or
2527 			 * multiple presses ending in mute */
2528 			issue_volchange(oldn->volume_level, newn->volume_level,
2529 				event_mask);
2530 			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2531 		}
2532 	} else {
2533 		/* unmute */
2534 		if (oldn->mute) {
2535 			/* recently unmuted, issue 'unmute' keypress */
2536 			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2537 		}
2538 		if (oldn->volume_level != newn->volume_level) {
2539 			issue_volchange(oldn->volume_level, newn->volume_level,
2540 				event_mask);
2541 		} else if (oldn->volume_toggle != newn->volume_toggle) {
2542 			/* repeated vol up/down keypress at end of scale ? */
2543 			if (newn->volume_level == 0)
2544 				TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2545 			else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2546 				TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2547 		}
2548 	}
2549 
2550 	/* handle brightness */
2551 	if (oldn->brightness_level != newn->brightness_level) {
2552 		issue_brightnesschange(oldn->brightness_level,
2553 				       newn->brightness_level, event_mask);
2554 	} else if (oldn->brightness_toggle != newn->brightness_toggle) {
2555 		/* repeated key presses that didn't change state */
2556 		if (newn->brightness_level == 0)
2557 			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2558 		else if (newn->brightness_level >= bright_maxlvl
2559 				&& !tp_features.bright_unkfw)
2560 			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2561 	}
2562 
2563 #undef TPACPI_COMPARE_KEY
2564 #undef TPACPI_MAY_SEND_KEY
2565 }
2566 
2567 /*
2568  * Polling driver
2569  *
2570  * We track all events in hotkey_source_mask all the time, since
2571  * most of them are edge-based.  We only issue those requested by
2572  * hotkey_user_mask or hotkey_driver_mask, though.
2573  */
2574 static int hotkey_kthread(void *data)
2575 {
2576 	struct tp_nvram_state s[2] = { 0 };
2577 	u32 poll_mask, event_mask;
2578 	unsigned int si, so;
2579 	unsigned long t;
2580 	unsigned int change_detector;
2581 	unsigned int poll_freq;
2582 	bool was_frozen;
2583 
2584 	if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2585 		goto exit;
2586 
2587 	set_freezable();
2588 
2589 	so = 0;
2590 	si = 1;
2591 	t = 0;
2592 
2593 	/* Initial state for compares */
2594 	mutex_lock(&hotkey_thread_data_mutex);
2595 	change_detector = hotkey_config_change;
2596 	poll_mask = hotkey_source_mask;
2597 	event_mask = hotkey_source_mask &
2598 			(hotkey_driver_mask | hotkey_user_mask);
2599 	poll_freq = hotkey_poll_freq;
2600 	mutex_unlock(&hotkey_thread_data_mutex);
2601 	hotkey_read_nvram(&s[so], poll_mask);
2602 
2603 	while (!kthread_should_stop()) {
2604 		if (t == 0) {
2605 			if (likely(poll_freq))
2606 				t = 1000/poll_freq;
2607 			else
2608 				t = 100;	/* should never happen... */
2609 		}
2610 		t = msleep_interruptible(t);
2611 		if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2612 			break;
2613 
2614 		if (t > 0 && !was_frozen)
2615 			continue;
2616 
2617 		mutex_lock(&hotkey_thread_data_mutex);
2618 		if (was_frozen || hotkey_config_change != change_detector) {
2619 			/* forget old state on thaw or config change */
2620 			si = so;
2621 			t = 0;
2622 			change_detector = hotkey_config_change;
2623 		}
2624 		poll_mask = hotkey_source_mask;
2625 		event_mask = hotkey_source_mask &
2626 				(hotkey_driver_mask | hotkey_user_mask);
2627 		poll_freq = hotkey_poll_freq;
2628 		mutex_unlock(&hotkey_thread_data_mutex);
2629 
2630 		if (likely(poll_mask)) {
2631 			hotkey_read_nvram(&s[si], poll_mask);
2632 			if (likely(si != so)) {
2633 				hotkey_compare_and_issue_event(&s[so], &s[si],
2634 								event_mask);
2635 			}
2636 		}
2637 
2638 		so = si;
2639 		si ^= 1;
2640 	}
2641 
2642 exit:
2643 	return 0;
2644 }
2645 
2646 /* call with hotkey_mutex held */
2647 static void hotkey_poll_stop_sync(void)
2648 {
2649 	if (tpacpi_hotkey_task) {
2650 		kthread_stop(tpacpi_hotkey_task);
2651 		tpacpi_hotkey_task = NULL;
2652 	}
2653 }
2654 
2655 /* call with hotkey_mutex held */
2656 static void hotkey_poll_setup(const bool may_warn)
2657 {
2658 	const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2659 	const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2660 
2661 	if (hotkey_poll_freq > 0 &&
2662 	    (poll_driver_mask ||
2663 	     (poll_user_mask && tpacpi_inputdev->users > 0))) {
2664 		if (!tpacpi_hotkey_task) {
2665 			tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2666 					NULL, TPACPI_NVRAM_KTHREAD_NAME);
2667 			if (IS_ERR(tpacpi_hotkey_task)) {
2668 				tpacpi_hotkey_task = NULL;
2669 				pr_err("could not create kernel thread for hotkey polling\n");
2670 			}
2671 		}
2672 	} else {
2673 		hotkey_poll_stop_sync();
2674 		if (may_warn && (poll_driver_mask || poll_user_mask) &&
2675 		    hotkey_poll_freq == 0) {
2676 			pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n",
2677 				  poll_user_mask, poll_driver_mask);
2678 		}
2679 	}
2680 }
2681 
2682 static void hotkey_poll_setup_safe(const bool may_warn)
2683 {
2684 	mutex_lock(&hotkey_mutex);
2685 	hotkey_poll_setup(may_warn);
2686 	mutex_unlock(&hotkey_mutex);
2687 }
2688 
2689 /* call with hotkey_mutex held */
2690 static void hotkey_poll_set_freq(unsigned int freq)
2691 {
2692 	if (!freq)
2693 		hotkey_poll_stop_sync();
2694 
2695 	hotkey_poll_freq = freq;
2696 }
2697 
2698 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2699 
2700 static void hotkey_poll_setup(const bool __unused)
2701 {
2702 }
2703 
2704 static void hotkey_poll_setup_safe(const bool __unused)
2705 {
2706 }
2707 
2708 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2709 
2710 static int hotkey_inputdev_open(struct input_dev *dev)
2711 {
2712 	switch (tpacpi_lifecycle) {
2713 	case TPACPI_LIFE_INIT:
2714 	case TPACPI_LIFE_RUNNING:
2715 		hotkey_poll_setup_safe(false);
2716 		return 0;
2717 	case TPACPI_LIFE_EXITING:
2718 		return -EBUSY;
2719 	}
2720 
2721 	/* Should only happen if tpacpi_lifecycle is corrupt */
2722 	BUG();
2723 	return -EBUSY;
2724 }
2725 
2726 static void hotkey_inputdev_close(struct input_dev *dev)
2727 {
2728 	/* disable hotkey polling when possible */
2729 	if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2730 	    !(hotkey_source_mask & hotkey_driver_mask))
2731 		hotkey_poll_setup_safe(false);
2732 }
2733 
2734 /* sysfs hotkey enable ------------------------------------------------- */
2735 static ssize_t hotkey_enable_show(struct device *dev,
2736 			   struct device_attribute *attr,
2737 			   char *buf)
2738 {
2739 	int res, status;
2740 
2741 	printk_deprecated_attribute("hotkey_enable",
2742 			"Hotkey reporting is always enabled");
2743 
2744 	res = hotkey_status_get(&status);
2745 	if (res)
2746 		return res;
2747 
2748 	return snprintf(buf, PAGE_SIZE, "%d\n", status);
2749 }
2750 
2751 static ssize_t hotkey_enable_store(struct device *dev,
2752 			    struct device_attribute *attr,
2753 			    const char *buf, size_t count)
2754 {
2755 	unsigned long t;
2756 
2757 	printk_deprecated_attribute("hotkey_enable",
2758 			"Hotkeys can be disabled through hotkey_mask");
2759 
2760 	if (parse_strtoul(buf, 1, &t))
2761 		return -EINVAL;
2762 
2763 	if (t == 0)
2764 		return -EPERM;
2765 
2766 	return count;
2767 }
2768 
2769 static DEVICE_ATTR_RW(hotkey_enable);
2770 
2771 /* sysfs hotkey mask --------------------------------------------------- */
2772 static ssize_t hotkey_mask_show(struct device *dev,
2773 			   struct device_attribute *attr,
2774 			   char *buf)
2775 {
2776 	return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2777 }
2778 
2779 static ssize_t hotkey_mask_store(struct device *dev,
2780 			    struct device_attribute *attr,
2781 			    const char *buf, size_t count)
2782 {
2783 	unsigned long t;
2784 	int res;
2785 
2786 	if (parse_strtoul(buf, 0xffffffffUL, &t))
2787 		return -EINVAL;
2788 
2789 	if (mutex_lock_killable(&hotkey_mutex))
2790 		return -ERESTARTSYS;
2791 
2792 	res = hotkey_user_mask_set(t);
2793 
2794 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2795 	hotkey_poll_setup(true);
2796 #endif
2797 
2798 	mutex_unlock(&hotkey_mutex);
2799 
2800 	tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2801 
2802 	return (res) ? res : count;
2803 }
2804 
2805 static DEVICE_ATTR_RW(hotkey_mask);
2806 
2807 /* sysfs hotkey bios_enabled ------------------------------------------- */
2808 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2809 			   struct device_attribute *attr,
2810 			   char *buf)
2811 {
2812 	return sprintf(buf, "0\n");
2813 }
2814 
2815 static DEVICE_ATTR_RO(hotkey_bios_enabled);
2816 
2817 /* sysfs hotkey bios_mask ---------------------------------------------- */
2818 static ssize_t hotkey_bios_mask_show(struct device *dev,
2819 			   struct device_attribute *attr,
2820 			   char *buf)
2821 {
2822 	printk_deprecated_attribute("hotkey_bios_mask",
2823 			"This attribute is useless.");
2824 	return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2825 }
2826 
2827 static DEVICE_ATTR_RO(hotkey_bios_mask);
2828 
2829 /* sysfs hotkey all_mask ----------------------------------------------- */
2830 static ssize_t hotkey_all_mask_show(struct device *dev,
2831 			   struct device_attribute *attr,
2832 			   char *buf)
2833 {
2834 	return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2835 				hotkey_all_mask | hotkey_source_mask);
2836 }
2837 
2838 static DEVICE_ATTR_RO(hotkey_all_mask);
2839 
2840 /* sysfs hotkey all_mask ----------------------------------------------- */
2841 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev,
2842 			   struct device_attribute *attr,
2843 			   char *buf)
2844 {
2845 	return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2846 			hotkey_adaptive_all_mask | hotkey_source_mask);
2847 }
2848 
2849 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask);
2850 
2851 /* sysfs hotkey recommended_mask --------------------------------------- */
2852 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2853 					    struct device_attribute *attr,
2854 					    char *buf)
2855 {
2856 	return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2857 			(hotkey_all_mask | hotkey_source_mask)
2858 			& ~hotkey_reserved_mask);
2859 }
2860 
2861 static DEVICE_ATTR_RO(hotkey_recommended_mask);
2862 
2863 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2864 
2865 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2866 static ssize_t hotkey_source_mask_show(struct device *dev,
2867 			   struct device_attribute *attr,
2868 			   char *buf)
2869 {
2870 	return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2871 }
2872 
2873 static ssize_t hotkey_source_mask_store(struct device *dev,
2874 			    struct device_attribute *attr,
2875 			    const char *buf, size_t count)
2876 {
2877 	unsigned long t;
2878 	u32 r_ev;
2879 	int rc;
2880 
2881 	if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2882 		((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2883 		return -EINVAL;
2884 
2885 	if (mutex_lock_killable(&hotkey_mutex))
2886 		return -ERESTARTSYS;
2887 
2888 	HOTKEY_CONFIG_CRITICAL_START
2889 	hotkey_source_mask = t;
2890 	HOTKEY_CONFIG_CRITICAL_END
2891 
2892 	rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2893 			~hotkey_source_mask);
2894 	hotkey_poll_setup(true);
2895 
2896 	/* check if events needed by the driver got disabled */
2897 	r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2898 		& ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2899 
2900 	mutex_unlock(&hotkey_mutex);
2901 
2902 	if (rc < 0)
2903 		pr_err("hotkey_source_mask: failed to update the firmware event mask!\n");
2904 
2905 	if (r_ev)
2906 		pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n",
2907 			  r_ev);
2908 
2909 	tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2910 
2911 	return (rc < 0) ? rc : count;
2912 }
2913 
2914 static DEVICE_ATTR_RW(hotkey_source_mask);
2915 
2916 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2917 static ssize_t hotkey_poll_freq_show(struct device *dev,
2918 			   struct device_attribute *attr,
2919 			   char *buf)
2920 {
2921 	return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2922 }
2923 
2924 static ssize_t hotkey_poll_freq_store(struct device *dev,
2925 			    struct device_attribute *attr,
2926 			    const char *buf, size_t count)
2927 {
2928 	unsigned long t;
2929 
2930 	if (parse_strtoul(buf, 25, &t))
2931 		return -EINVAL;
2932 
2933 	if (mutex_lock_killable(&hotkey_mutex))
2934 		return -ERESTARTSYS;
2935 
2936 	hotkey_poll_set_freq(t);
2937 	hotkey_poll_setup(true);
2938 
2939 	mutex_unlock(&hotkey_mutex);
2940 
2941 	tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2942 
2943 	return count;
2944 }
2945 
2946 static DEVICE_ATTR_RW(hotkey_poll_freq);
2947 
2948 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2949 
2950 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2951 static ssize_t hotkey_radio_sw_show(struct device *dev,
2952 			   struct device_attribute *attr,
2953 			   char *buf)
2954 {
2955 	int res;
2956 	res = hotkey_get_wlsw();
2957 	if (res < 0)
2958 		return res;
2959 
2960 	/* Opportunistic update */
2961 	tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2962 
2963 	return snprintf(buf, PAGE_SIZE, "%d\n",
2964 			(res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2965 }
2966 
2967 static DEVICE_ATTR_RO(hotkey_radio_sw);
2968 
2969 static void hotkey_radio_sw_notify_change(void)
2970 {
2971 	if (tp_features.hotkey_wlsw)
2972 		sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2973 			     "hotkey_radio_sw");
2974 }
2975 
2976 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2977 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2978 			   struct device_attribute *attr,
2979 			   char *buf)
2980 {
2981 	int res, s;
2982 	res = hotkey_get_tablet_mode(&s);
2983 	if (res < 0)
2984 		return res;
2985 
2986 	return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2987 }
2988 
2989 static DEVICE_ATTR_RO(hotkey_tablet_mode);
2990 
2991 static void hotkey_tablet_mode_notify_change(void)
2992 {
2993 	if (tp_features.hotkey_tablet)
2994 		sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2995 			     "hotkey_tablet_mode");
2996 }
2997 
2998 /* sysfs wakeup reason (pollable) -------------------------------------- */
2999 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
3000 			   struct device_attribute *attr,
3001 			   char *buf)
3002 {
3003 	return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
3004 }
3005 
3006 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
3007 
3008 static void hotkey_wakeup_reason_notify_change(void)
3009 {
3010 	sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
3011 		     "wakeup_reason");
3012 }
3013 
3014 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
3015 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
3016 			   struct device_attribute *attr,
3017 			   char *buf)
3018 {
3019 	return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
3020 }
3021 
3022 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO,
3023 		   hotkey_wakeup_hotunplug_complete_show, NULL);
3024 
3025 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
3026 {
3027 	sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
3028 		     "wakeup_hotunplug_complete");
3029 }
3030 
3031 /* sysfs adaptive kbd mode --------------------------------------------- */
3032 
3033 static int adaptive_keyboard_get_mode(void);
3034 static int adaptive_keyboard_set_mode(int new_mode);
3035 
3036 enum ADAPTIVE_KEY_MODE {
3037 	HOME_MODE,
3038 	WEB_BROWSER_MODE,
3039 	WEB_CONFERENCE_MODE,
3040 	FUNCTION_MODE,
3041 	LAYFLAT_MODE
3042 };
3043 
3044 static ssize_t adaptive_kbd_mode_show(struct device *dev,
3045 			   struct device_attribute *attr,
3046 			   char *buf)
3047 {
3048 	int current_mode;
3049 
3050 	current_mode = adaptive_keyboard_get_mode();
3051 	if (current_mode < 0)
3052 		return current_mode;
3053 
3054 	return snprintf(buf, PAGE_SIZE, "%d\n", current_mode);
3055 }
3056 
3057 static ssize_t adaptive_kbd_mode_store(struct device *dev,
3058 			    struct device_attribute *attr,
3059 			    const char *buf, size_t count)
3060 {
3061 	unsigned long t;
3062 	int res;
3063 
3064 	if (parse_strtoul(buf, LAYFLAT_MODE, &t))
3065 		return -EINVAL;
3066 
3067 	res = adaptive_keyboard_set_mode(t);
3068 	return (res < 0) ? res : count;
3069 }
3070 
3071 static DEVICE_ATTR_RW(adaptive_kbd_mode);
3072 
3073 static struct attribute *adaptive_kbd_attributes[] = {
3074 	&dev_attr_adaptive_kbd_mode.attr,
3075 	NULL
3076 };
3077 
3078 static const struct attribute_group adaptive_kbd_attr_group = {
3079 	.attrs = adaptive_kbd_attributes,
3080 };
3081 
3082 /* --------------------------------------------------------------------- */
3083 
3084 static struct attribute *hotkey_attributes[] __initdata = {
3085 	&dev_attr_hotkey_enable.attr,
3086 	&dev_attr_hotkey_bios_enabled.attr,
3087 	&dev_attr_hotkey_bios_mask.attr,
3088 	&dev_attr_wakeup_reason.attr,
3089 	&dev_attr_wakeup_hotunplug_complete.attr,
3090 	&dev_attr_hotkey_mask.attr,
3091 	&dev_attr_hotkey_all_mask.attr,
3092 	&dev_attr_hotkey_adaptive_all_mask.attr,
3093 	&dev_attr_hotkey_recommended_mask.attr,
3094 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3095 	&dev_attr_hotkey_source_mask.attr,
3096 	&dev_attr_hotkey_poll_freq.attr,
3097 #endif
3098 };
3099 
3100 /*
3101  * Sync both the hw and sw blocking state of all switches
3102  */
3103 static void tpacpi_send_radiosw_update(void)
3104 {
3105 	int wlsw;
3106 
3107 	/*
3108 	 * We must sync all rfkill controllers *before* issuing any
3109 	 * rfkill input events, or we will race the rfkill core input
3110 	 * handler.
3111 	 *
3112 	 * tpacpi_inputdev_send_mutex works as a synchronization point
3113 	 * for the above.
3114 	 *
3115 	 * We optimize to avoid numerous calls to hotkey_get_wlsw.
3116 	 */
3117 
3118 	wlsw = hotkey_get_wlsw();
3119 
3120 	/* Sync hw blocking state first if it is hw-blocked */
3121 	if (wlsw == TPACPI_RFK_RADIO_OFF)
3122 		tpacpi_rfk_update_hwblock_state(true);
3123 
3124 	/* Sync sw blocking state */
3125 	tpacpi_rfk_update_swstate_all();
3126 
3127 	/* Sync hw blocking state last if it is hw-unblocked */
3128 	if (wlsw == TPACPI_RFK_RADIO_ON)
3129 		tpacpi_rfk_update_hwblock_state(false);
3130 
3131 	/* Issue rfkill input event for WLSW switch */
3132 	if (!(wlsw < 0)) {
3133 		mutex_lock(&tpacpi_inputdev_send_mutex);
3134 
3135 		input_report_switch(tpacpi_inputdev,
3136 				    SW_RFKILL_ALL, (wlsw > 0));
3137 		input_sync(tpacpi_inputdev);
3138 
3139 		mutex_unlock(&tpacpi_inputdev_send_mutex);
3140 	}
3141 
3142 	/*
3143 	 * this can be unconditional, as we will poll state again
3144 	 * if userspace uses the notify to read data
3145 	 */
3146 	hotkey_radio_sw_notify_change();
3147 }
3148 
3149 static void hotkey_exit(void)
3150 {
3151 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3152 	mutex_lock(&hotkey_mutex);
3153 	hotkey_poll_stop_sync();
3154 	mutex_unlock(&hotkey_mutex);
3155 #endif
3156 
3157 	if (hotkey_dev_attributes)
3158 		delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3159 
3160 	dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3161 		   "restoring original HKEY status and mask\n");
3162 	/* yes, there is a bitwise or below, we want the
3163 	 * functions to be called even if one of them fail */
3164 	if (((tp_features.hotkey_mask &&
3165 	      hotkey_mask_set(hotkey_orig_mask)) |
3166 	     hotkey_status_set(false)) != 0)
3167 		pr_err("failed to restore hot key mask to BIOS defaults\n");
3168 }
3169 
3170 static void __init hotkey_unmap(const unsigned int scancode)
3171 {
3172 	if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3173 		clear_bit(hotkey_keycode_map[scancode],
3174 			  tpacpi_inputdev->keybit);
3175 		hotkey_keycode_map[scancode] = KEY_RESERVED;
3176 	}
3177 }
3178 
3179 /*
3180  * HKEY quirks:
3181  *   TPACPI_HK_Q_INIMASK:	Supports FN+F3,FN+F4,FN+F12
3182  */
3183 
3184 #define	TPACPI_HK_Q_INIMASK	0x0001
3185 
3186 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3187 	TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3188 	TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3189 	TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3190 	TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3191 	TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3192 	TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3193 	TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3194 	TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3195 	TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3196 	TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3197 	TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3198 	TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3199 	TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3200 	TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3201 	TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3202 	TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3203 	TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3204 	TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3205 	TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3206 };
3207 
3208 typedef u16 tpacpi_keymap_entry_t;
3209 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3210 
3211 static int hotkey_init_tablet_mode(void)
3212 {
3213 	int in_tablet_mode = 0, res;
3214 	char *type = NULL;
3215 
3216 	if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) {
3217 		int has_tablet_mode;
3218 
3219 		in_tablet_mode = hotkey_gmms_get_tablet_mode(res,
3220 							     &has_tablet_mode);
3221 		/*
3222 		 * The Yoga 11e series has 2 accelerometers described by a
3223 		 * BOSC0200 ACPI node. This setup relies on a Windows service
3224 		 * which calls special ACPI methods on this node to report
3225 		 * the laptop/tent/tablet mode to the EC. The bmc150 iio driver
3226 		 * does not support this, so skip the hotkey on these models.
3227 		 */
3228 		if (has_tablet_mode && !acpi_dev_present("BOSC0200", "1", -1))
3229 			tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS;
3230 		type = "GMMS";
3231 	} else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {
3232 		/* For X41t, X60t, X61t Tablets... */
3233 		tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG;
3234 		in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK);
3235 		type = "MHKG";
3236 	}
3237 
3238 	if (!tp_features.hotkey_tablet)
3239 		return 0;
3240 
3241 	pr_info("Tablet mode switch found (type: %s), currently in %s mode\n",
3242 		type, in_tablet_mode ? "tablet" : "laptop");
3243 
3244 	res = add_to_attr_set(hotkey_dev_attributes,
3245 			      &dev_attr_hotkey_tablet_mode.attr);
3246 	if (res)
3247 		return -1;
3248 
3249 	return in_tablet_mode;
3250 }
3251 
3252 static int __init hotkey_init(struct ibm_init_struct *iibm)
3253 {
3254 	/* Requirements for changing the default keymaps:
3255 	 *
3256 	 * 1. Many of the keys are mapped to KEY_RESERVED for very
3257 	 *    good reasons.  Do not change them unless you have deep
3258 	 *    knowledge on the IBM and Lenovo ThinkPad firmware for
3259 	 *    the various ThinkPad models.  The driver behaves
3260 	 *    differently for KEY_RESERVED: such keys have their
3261 	 *    hot key mask *unset* in mask_recommended, and also
3262 	 *    in the initial hot key mask programmed into the
3263 	 *    firmware at driver load time, which means the firm-
3264 	 *    ware may react very differently if you change them to
3265 	 *    something else;
3266 	 *
3267 	 * 2. You must be subscribed to the linux-thinkpad and
3268 	 *    ibm-acpi-devel mailing lists, and you should read the
3269 	 *    list archives since 2007 if you want to change the
3270 	 *    keymaps.  This requirement exists so that you will
3271 	 *    know the past history of problems with the thinkpad-
3272 	 *    acpi driver keymaps, and also that you will be
3273 	 *    listening to any bug reports;
3274 	 *
3275 	 * 3. Do not send thinkpad-acpi specific patches directly to
3276 	 *    for merging, *ever*.  Send them to the linux-acpi
3277 	 *    mailinglist for comments.  Merging is to be done only
3278 	 *    through acpi-test and the ACPI maintainer.
3279 	 *
3280 	 * If the above is too much to ask, don't change the keymap.
3281 	 * Ask the thinkpad-acpi maintainer to do it, instead.
3282 	 */
3283 
3284 	enum keymap_index {
3285 		TPACPI_KEYMAP_IBM_GENERIC = 0,
3286 		TPACPI_KEYMAP_LENOVO_GENERIC,
3287 	};
3288 
3289 	static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3290 	/* Generic keymap for IBM ThinkPads */
3291 	[TPACPI_KEYMAP_IBM_GENERIC] = {
3292 		/* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3293 		KEY_FN_F1,	KEY_BATTERY,	KEY_COFFEE,	KEY_SLEEP,
3294 		KEY_WLAN,	KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3295 		KEY_FN_F9,	KEY_FN_F10,	KEY_FN_F11,	KEY_SUSPEND,
3296 
3297 		/* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3298 		KEY_UNKNOWN,	/* 0x0C: FN+BACKSPACE */
3299 		KEY_UNKNOWN,	/* 0x0D: FN+INSERT */
3300 		KEY_UNKNOWN,	/* 0x0E: FN+DELETE */
3301 
3302 		/* brightness: firmware always reacts to them */
3303 		KEY_RESERVED,	/* 0x0F: FN+HOME (brightness up) */
3304 		KEY_RESERVED,	/* 0x10: FN+END (brightness down) */
3305 
3306 		/* Thinklight: firmware always react to it */
3307 		KEY_RESERVED,	/* 0x11: FN+PGUP (thinklight toggle) */
3308 
3309 		KEY_UNKNOWN,	/* 0x12: FN+PGDOWN */
3310 		KEY_ZOOM,	/* 0x13: FN+SPACE (zoom) */
3311 
3312 		/* Volume: firmware always react to it and reprograms
3313 		 * the built-in *extra* mixer.  Never map it to control
3314 		 * another mixer by default. */
3315 		KEY_RESERVED,	/* 0x14: VOLUME UP */
3316 		KEY_RESERVED,	/* 0x15: VOLUME DOWN */
3317 		KEY_RESERVED,	/* 0x16: MUTE */
3318 
3319 		KEY_VENDOR,	/* 0x17: Thinkpad/AccessIBM/Lenovo */
3320 
3321 		/* (assignments unknown, please report if found) */
3322 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3323 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3324 
3325 		/* No assignments, only used for Adaptive keyboards. */
3326 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3327 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3328 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3329 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3330 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3331 
3332 		/* No assignment, used for newer Lenovo models */
3333 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3334 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3335 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3336 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3337 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3338 		KEY_UNKNOWN, KEY_UNKNOWN
3339 
3340 		},
3341 
3342 	/* Generic keymap for Lenovo ThinkPads */
3343 	[TPACPI_KEYMAP_LENOVO_GENERIC] = {
3344 		/* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3345 		KEY_FN_F1,	KEY_COFFEE,	KEY_BATTERY,	KEY_SLEEP,
3346 		KEY_WLAN,	KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3347 		KEY_FN_F9,	KEY_FN_F10,	KEY_FN_F11,	KEY_SUSPEND,
3348 
3349 		/* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3350 		KEY_UNKNOWN,	/* 0x0C: FN+BACKSPACE */
3351 		KEY_UNKNOWN,	/* 0x0D: FN+INSERT */
3352 		KEY_UNKNOWN,	/* 0x0E: FN+DELETE */
3353 
3354 		/* These should be enabled --only-- when ACPI video
3355 		 * is disabled (i.e. in "vendor" mode), and are handled
3356 		 * in a special way by the init code */
3357 		KEY_BRIGHTNESSUP,	/* 0x0F: FN+HOME (brightness up) */
3358 		KEY_BRIGHTNESSDOWN,	/* 0x10: FN+END (brightness down) */
3359 
3360 		KEY_RESERVED,	/* 0x11: FN+PGUP (thinklight toggle) */
3361 
3362 		KEY_UNKNOWN,	/* 0x12: FN+PGDOWN */
3363 		KEY_ZOOM,	/* 0x13: FN+SPACE (zoom) */
3364 
3365 		/* Volume: z60/z61, T60 (BIOS version?): firmware always
3366 		 * react to it and reprograms the built-in *extra* mixer.
3367 		 * Never map it to control another mixer by default.
3368 		 *
3369 		 * T60?, T61, R60?, R61: firmware and EC tries to send
3370 		 * these over the regular keyboard, so these are no-ops,
3371 		 * but there are still weird bugs re. MUTE, so do not
3372 		 * change unless you get test reports from all Lenovo
3373 		 * models.  May cause the BIOS to interfere with the
3374 		 * HDA mixer.
3375 		 */
3376 		KEY_RESERVED,	/* 0x14: VOLUME UP */
3377 		KEY_RESERVED,	/* 0x15: VOLUME DOWN */
3378 		KEY_RESERVED,	/* 0x16: MUTE */
3379 
3380 		KEY_VENDOR,	/* 0x17: Thinkpad/AccessIBM/Lenovo */
3381 
3382 		/* (assignments unknown, please report if found) */
3383 		KEY_UNKNOWN, KEY_UNKNOWN,
3384 
3385 		/*
3386 		 * The mic mute button only sends 0x1a.  It does not
3387 		 * automatically mute the mic or change the mute light.
3388 		 */
3389 		KEY_MICMUTE,	/* 0x1a: Mic mute (since ?400 or so) */
3390 
3391 		/* (assignments unknown, please report if found) */
3392 		KEY_UNKNOWN,
3393 
3394 		/* Extra keys in use since the X240 / T440 / T540 */
3395 		KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
3396 
3397 		/*
3398 		 * These are the adaptive keyboard keycodes for Carbon X1 2014.
3399 		 * The first item in this list is the Mute button which is
3400 		 * emitted with 0x103 through
3401 		 * adaptive_keyboard_hotkey_notify_hotkey() when the sound
3402 		 * symbol is held.
3403 		 * We'll need to offset those by 0x20.
3404 		 */
3405 		KEY_RESERVED,        /* Mute held, 0x103 */
3406 		KEY_BRIGHTNESS_MIN,  /* Backlight off */
3407 		KEY_RESERVED,        /* Clipping tool */
3408 		KEY_RESERVED,        /* Cloud */
3409 		KEY_RESERVED,
3410 		KEY_VOICECOMMAND,    /* Voice */
3411 		KEY_RESERVED,
3412 		KEY_RESERVED,        /* Gestures */
3413 		KEY_RESERVED,
3414 		KEY_RESERVED,
3415 		KEY_RESERVED,
3416 		KEY_CONFIG,          /* Settings */
3417 		KEY_RESERVED,        /* New tab */
3418 		KEY_REFRESH,         /* Reload */
3419 		KEY_BACK,            /* Back */
3420 		KEY_RESERVED,        /* Microphone down */
3421 		KEY_RESERVED,        /* Microphone up */
3422 		KEY_RESERVED,        /* Microphone cancellation */
3423 		KEY_RESERVED,        /* Camera mode */
3424 		KEY_RESERVED,        /* Rotate display, 0x116 */
3425 
3426 		/*
3427 		 * These are found in 2017 models (e.g. T470s, X270).
3428 		 * The lowest known value is 0x311, which according to
3429 		 * the manual should launch a user defined favorite
3430 		 * application.
3431 		 *
3432 		 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START,
3433 		 * corresponding to 0x34.
3434 		 */
3435 
3436 		/* (assignments unknown, please report if found) */
3437 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3438 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3439 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3440 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3441 		KEY_UNKNOWN,
3442 
3443 		KEY_BOOKMARKS,			/* Favorite app, 0x311 */
3444 		KEY_SELECTIVE_SCREENSHOT,	/* Clipping tool */
3445 		KEY_CALC,			/* Calculator (above numpad, P52) */
3446 		KEY_BLUETOOTH,			/* Bluetooth */
3447 		KEY_KEYBOARD,			/* Keyboard, 0x315 */
3448 		KEY_FN_RIGHT_SHIFT,		/* Fn + right Shift */
3449 		KEY_NOTIFICATION_CENTER,	/* Notification Center */
3450 		KEY_PICKUP_PHONE,		/* Answer incoming call */
3451 		KEY_HANGUP_PHONE,		/* Decline incoming call */
3452 		},
3453 	};
3454 
3455 	static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3456 		/* Generic maps (fallback) */
3457 		{
3458 		  .vendor = PCI_VENDOR_ID_IBM,
3459 		  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3460 		  .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3461 		},
3462 		{
3463 		  .vendor = PCI_VENDOR_ID_LENOVO,
3464 		  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3465 		  .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3466 		},
3467 	};
3468 
3469 #define TPACPI_HOTKEY_MAP_SIZE		sizeof(tpacpi_keymap_t)
3470 #define TPACPI_HOTKEY_MAP_TYPESIZE	sizeof(tpacpi_keymap_entry_t)
3471 
3472 	int res, i;
3473 	int status;
3474 	int hkeyv;
3475 	bool radiosw_state  = false;
3476 	bool tabletsw_state = false;
3477 
3478 	unsigned long quirks;
3479 	unsigned long keymap_id;
3480 
3481 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3482 			"initializing hotkey subdriver\n");
3483 
3484 	BUG_ON(!tpacpi_inputdev);
3485 	BUG_ON(tpacpi_inputdev->open != NULL ||
3486 	       tpacpi_inputdev->close != NULL);
3487 
3488 	TPACPI_ACPIHANDLE_INIT(hkey);
3489 	mutex_init(&hotkey_mutex);
3490 
3491 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3492 	mutex_init(&hotkey_thread_data_mutex);
3493 #endif
3494 
3495 	/* hotkey not supported on 570 */
3496 	tp_features.hotkey = hkey_handle != NULL;
3497 
3498 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3499 		"hotkeys are %s\n",
3500 		str_supported(tp_features.hotkey));
3501 
3502 	if (!tp_features.hotkey)
3503 		return 1;
3504 
3505 	quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3506 				     ARRAY_SIZE(tpacpi_hotkey_qtable));
3507 
3508 	tpacpi_disable_brightness_delay();
3509 
3510 	/* MUST have enough space for all attributes to be added to
3511 	 * hotkey_dev_attributes */
3512 	hotkey_dev_attributes = create_attr_set(
3513 					ARRAY_SIZE(hotkey_attributes) + 2,
3514 					NULL);
3515 	if (!hotkey_dev_attributes)
3516 		return -ENOMEM;
3517 	res = add_many_to_attr_set(hotkey_dev_attributes,
3518 			hotkey_attributes,
3519 			ARRAY_SIZE(hotkey_attributes));
3520 	if (res)
3521 		goto err_exit;
3522 
3523 	/* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3524 	   A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3525 	   for HKEY interface version 0x100 */
3526 	if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3527 		vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3528 			    "firmware HKEY interface version: 0x%x\n",
3529 			    hkeyv);
3530 
3531 		switch (hkeyv >> 8) {
3532 		case 1:
3533 			/*
3534 			 * MHKV 0x100 in A31, R40, R40e,
3535 			 * T4x, X31, and later
3536 			 */
3537 
3538 			/* Paranoia check AND init hotkey_all_mask */
3539 			if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3540 					"MHKA", "qd")) {
3541 				pr_err("missing MHKA handler, please report this to %s\n",
3542 				       TPACPI_MAIL);
3543 				/* Fallback: pre-init for FN+F3,F4,F12 */
3544 				hotkey_all_mask = 0x080cU;
3545 			} else {
3546 				tp_features.hotkey_mask = 1;
3547 			}
3548 			break;
3549 
3550 		case 2:
3551 			/*
3552 			 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016)
3553 			 */
3554 
3555 			/* Paranoia check AND init hotkey_all_mask */
3556 			if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3557 					"MHKA", "dd", 1)) {
3558 				pr_err("missing MHKA handler, please report this to %s\n",
3559 				       TPACPI_MAIL);
3560 				/* Fallback: pre-init for FN+F3,F4,F12 */
3561 				hotkey_all_mask = 0x080cU;
3562 			} else {
3563 				tp_features.hotkey_mask = 1;
3564 			}
3565 
3566 			/*
3567 			 * Check if we have an adaptive keyboard, like on the
3568 			 * Lenovo Carbon X1 2014 (2nd Gen).
3569 			 */
3570 			if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask,
3571 				       "MHKA", "dd", 2)) {
3572 				if (hotkey_adaptive_all_mask != 0) {
3573 					tp_features.has_adaptive_kbd = true;
3574 					res = sysfs_create_group(
3575 						&tpacpi_pdev->dev.kobj,
3576 						&adaptive_kbd_attr_group);
3577 					if (res)
3578 						goto err_exit;
3579 				}
3580 			} else {
3581 				tp_features.has_adaptive_kbd = false;
3582 				hotkey_adaptive_all_mask = 0x0U;
3583 			}
3584 			break;
3585 
3586 		default:
3587 			pr_err("unknown version of the HKEY interface: 0x%x\n",
3588 			       hkeyv);
3589 			pr_err("please report this to %s\n", TPACPI_MAIL);
3590 			break;
3591 		}
3592 	}
3593 
3594 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3595 		"hotkey masks are %s\n",
3596 		str_supported(tp_features.hotkey_mask));
3597 
3598 	/* Init hotkey_all_mask if not initialized yet */
3599 	if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3600 	    (quirks & TPACPI_HK_Q_INIMASK))
3601 		hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3602 
3603 	/* Init hotkey_acpi_mask and hotkey_orig_mask */
3604 	if (tp_features.hotkey_mask) {
3605 		/* hotkey_source_mask *must* be zero for
3606 		 * the first hotkey_mask_get to return hotkey_orig_mask */
3607 		res = hotkey_mask_get();
3608 		if (res)
3609 			goto err_exit;
3610 
3611 		hotkey_orig_mask = hotkey_acpi_mask;
3612 	} else {
3613 		hotkey_orig_mask = hotkey_all_mask;
3614 		hotkey_acpi_mask = hotkey_all_mask;
3615 	}
3616 
3617 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3618 	if (dbg_wlswemul) {
3619 		tp_features.hotkey_wlsw = 1;
3620 		radiosw_state = !!tpacpi_wlsw_emulstate;
3621 		pr_info("radio switch emulation enabled\n");
3622 	} else
3623 #endif
3624 	/* Not all thinkpads have a hardware radio switch */
3625 	if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3626 		tp_features.hotkey_wlsw = 1;
3627 		radiosw_state = !!status;
3628 		pr_info("radio switch found; radios are %s\n",
3629 			enabled(status, 0));
3630 	}
3631 	if (tp_features.hotkey_wlsw)
3632 		res = add_to_attr_set(hotkey_dev_attributes,
3633 				&dev_attr_hotkey_radio_sw.attr);
3634 
3635 	res = hotkey_init_tablet_mode();
3636 	if (res < 0)
3637 		goto err_exit;
3638 
3639 	tabletsw_state = res;
3640 
3641 	res = register_attr_set_with_sysfs(hotkey_dev_attributes,
3642 					   &tpacpi_pdev->dev.kobj);
3643 	if (res)
3644 		goto err_exit;
3645 
3646 	/* Set up key map */
3647 	keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3648 					ARRAY_SIZE(tpacpi_keymap_qtable));
3649 	BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3650 	dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3651 		   "using keymap number %lu\n", keymap_id);
3652 
3653 	hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id],
3654 			TPACPI_HOTKEY_MAP_SIZE,	GFP_KERNEL);
3655 	if (!hotkey_keycode_map) {
3656 		pr_err("failed to allocate memory for key map\n");
3657 		res = -ENOMEM;
3658 		goto err_exit;
3659 	}
3660 
3661 	input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3662 	tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3663 	tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3664 	tpacpi_inputdev->keycode = hotkey_keycode_map;
3665 	for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3666 		if (hotkey_keycode_map[i] != KEY_RESERVED) {
3667 			input_set_capability(tpacpi_inputdev, EV_KEY,
3668 						hotkey_keycode_map[i]);
3669 		} else {
3670 			if (i < sizeof(hotkey_reserved_mask)*8)
3671 				hotkey_reserved_mask |= 1 << i;
3672 		}
3673 	}
3674 
3675 	if (tp_features.hotkey_wlsw) {
3676 		input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3677 		input_report_switch(tpacpi_inputdev,
3678 				    SW_RFKILL_ALL, radiosw_state);
3679 	}
3680 	if (tp_features.hotkey_tablet) {
3681 		input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3682 		input_report_switch(tpacpi_inputdev,
3683 				    SW_TABLET_MODE, tabletsw_state);
3684 	}
3685 
3686 	/* Do not issue duplicate brightness change events to
3687 	 * userspace. tpacpi_detect_brightness_capabilities() must have
3688 	 * been called before this point  */
3689 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
3690 		pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n");
3691 		pr_notice("Disabling thinkpad-acpi brightness events by default...\n");
3692 
3693 		/* Disable brightness up/down on Lenovo thinkpads when
3694 		 * ACPI is handling them, otherwise it is plain impossible
3695 		 * for userspace to do something even remotely sane */
3696 		hotkey_reserved_mask |=
3697 			(1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3698 			| (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3699 		hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3700 		hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3701 	}
3702 
3703 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3704 	hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3705 				& ~hotkey_all_mask
3706 				& ~hotkey_reserved_mask;
3707 
3708 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3709 		    "hotkey source mask 0x%08x, polling freq %u\n",
3710 		    hotkey_source_mask, hotkey_poll_freq);
3711 #endif
3712 
3713 	dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3714 			"enabling firmware HKEY event interface...\n");
3715 	res = hotkey_status_set(true);
3716 	if (res) {
3717 		hotkey_exit();
3718 		return res;
3719 	}
3720 	res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3721 			       | hotkey_driver_mask)
3722 			      & ~hotkey_source_mask);
3723 	if (res < 0 && res != -ENXIO) {
3724 		hotkey_exit();
3725 		return res;
3726 	}
3727 	hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3728 				& ~hotkey_reserved_mask;
3729 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3730 		"initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3731 		hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3732 
3733 	tpacpi_inputdev->open = &hotkey_inputdev_open;
3734 	tpacpi_inputdev->close = &hotkey_inputdev_close;
3735 
3736 	hotkey_poll_setup_safe(true);
3737 
3738 	return 0;
3739 
3740 err_exit:
3741 	delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3742 	sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3743 			&adaptive_kbd_attr_group);
3744 
3745 	hotkey_dev_attributes = NULL;
3746 
3747 	return (res < 0) ? res : 1;
3748 }
3749 
3750 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
3751  * mode, Web conference mode, Function mode and Lay-flat mode.
3752  * We support Home mode and Function mode currently.
3753  *
3754  * Will consider support rest of modes in future.
3755  *
3756  */
3757 static const int adaptive_keyboard_modes[] = {
3758 	HOME_MODE,
3759 /*	WEB_BROWSER_MODE = 2,
3760 	WEB_CONFERENCE_MODE = 3, */
3761 	FUNCTION_MODE
3762 };
3763 
3764 #define DFR_CHANGE_ROW			0x101
3765 #define DFR_SHOW_QUICKVIEW_ROW		0x102
3766 #define FIRST_ADAPTIVE_KEY		0x103
3767 
3768 /* press Fn key a while second, it will switch to Function Mode. Then
3769  * release Fn key, previous mode be restored.
3770  */
3771 static bool adaptive_keyboard_mode_is_saved;
3772 static int adaptive_keyboard_prev_mode;
3773 
3774 static int adaptive_keyboard_get_mode(void)
3775 {
3776 	int mode = 0;
3777 
3778 	if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) {
3779 		pr_err("Cannot read adaptive keyboard mode\n");
3780 		return -EIO;
3781 	}
3782 
3783 	return mode;
3784 }
3785 
3786 static int adaptive_keyboard_set_mode(int new_mode)
3787 {
3788 	if (new_mode < 0 ||
3789 		new_mode > LAYFLAT_MODE)
3790 		return -EINVAL;
3791 
3792 	if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
3793 		pr_err("Cannot set adaptive keyboard mode\n");
3794 		return -EIO;
3795 	}
3796 
3797 	return 0;
3798 }
3799 
3800 static int adaptive_keyboard_get_next_mode(int mode)
3801 {
3802 	size_t i;
3803 	size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
3804 
3805 	for (i = 0; i <= max_mode; i++) {
3806 		if (adaptive_keyboard_modes[i] == mode)
3807 			break;
3808 	}
3809 
3810 	if (i >= max_mode)
3811 		i = 0;
3812 	else
3813 		i++;
3814 
3815 	return adaptive_keyboard_modes[i];
3816 }
3817 
3818 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
3819 {
3820 	int current_mode = 0;
3821 	int new_mode = 0;
3822 	int keycode;
3823 
3824 	switch (scancode) {
3825 	case DFR_CHANGE_ROW:
3826 		if (adaptive_keyboard_mode_is_saved) {
3827 			new_mode = adaptive_keyboard_prev_mode;
3828 			adaptive_keyboard_mode_is_saved = false;
3829 		} else {
3830 			current_mode = adaptive_keyboard_get_mode();
3831 			if (current_mode < 0)
3832 				return false;
3833 			new_mode = adaptive_keyboard_get_next_mode(
3834 					current_mode);
3835 		}
3836 
3837 		if (adaptive_keyboard_set_mode(new_mode) < 0)
3838 			return false;
3839 
3840 		return true;
3841 
3842 	case DFR_SHOW_QUICKVIEW_ROW:
3843 		current_mode = adaptive_keyboard_get_mode();
3844 		if (current_mode < 0)
3845 			return false;
3846 
3847 		adaptive_keyboard_prev_mode = current_mode;
3848 		adaptive_keyboard_mode_is_saved = true;
3849 
3850 		if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0)
3851 			return false;
3852 		return true;
3853 
3854 	default:
3855 		if (scancode < FIRST_ADAPTIVE_KEY ||
3856 		    scancode >= FIRST_ADAPTIVE_KEY +
3857 		    TP_ACPI_HOTKEYSCAN_EXTENDED_START -
3858 		    TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3859 			pr_info("Unhandled adaptive keyboard key: 0x%x\n",
3860 				scancode);
3861 			return false;
3862 		}
3863 		keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY +
3864 					     TP_ACPI_HOTKEYSCAN_ADAPTIVE_START];
3865 		if (keycode != KEY_RESERVED) {
3866 			mutex_lock(&tpacpi_inputdev_send_mutex);
3867 
3868 			input_report_key(tpacpi_inputdev, keycode, 1);
3869 			input_sync(tpacpi_inputdev);
3870 
3871 			input_report_key(tpacpi_inputdev, keycode, 0);
3872 			input_sync(tpacpi_inputdev);
3873 
3874 			mutex_unlock(&tpacpi_inputdev_send_mutex);
3875 		}
3876 		return true;
3877 	}
3878 }
3879 
3880 static bool hotkey_notify_hotkey(const u32 hkey,
3881 				 bool *send_acpi_ev,
3882 				 bool *ignore_acpi_ev)
3883 {
3884 	/* 0x1000-0x1FFF: key presses */
3885 	unsigned int scancode = hkey & 0xfff;
3886 	*send_acpi_ev = true;
3887 	*ignore_acpi_ev = false;
3888 
3889 	/*
3890 	 * Original events are in the 0x10XX range, the adaptive keyboard
3891 	 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017
3892 	 * models, additional keys are emitted through 0x13XX.
3893 	 */
3894 	switch ((hkey >> 8) & 0xf) {
3895 	case 0:
3896 		if (scancode > 0 &&
3897 		    scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3898 			/* HKEY event 0x1001 is scancode 0x00 */
3899 			scancode--;
3900 			if (!(hotkey_source_mask & (1 << scancode))) {
3901 				tpacpi_input_send_key_masked(scancode);
3902 				*send_acpi_ev = false;
3903 			} else {
3904 				*ignore_acpi_ev = true;
3905 			}
3906 			return true;
3907 		}
3908 		break;
3909 
3910 	case 1:
3911 		return adaptive_keyboard_hotkey_notify_hotkey(scancode);
3912 
3913 	case 3:
3914 		/* Extended keycodes start at 0x300 and our offset into the map
3915 		 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode
3916 		 * will be positive, but might not be in the correct range.
3917 		 */
3918 		scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START);
3919 		if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START &&
3920 		    scancode < TPACPI_HOTKEY_MAP_LEN) {
3921 			tpacpi_input_send_key(scancode);
3922 			return true;
3923 		}
3924 		break;
3925 	}
3926 
3927 	return false;
3928 }
3929 
3930 static bool hotkey_notify_wakeup(const u32 hkey,
3931 				 bool *send_acpi_ev,
3932 				 bool *ignore_acpi_ev)
3933 {
3934 	/* 0x2000-0x2FFF: Wakeup reason */
3935 	*send_acpi_ev = true;
3936 	*ignore_acpi_ev = false;
3937 
3938 	switch (hkey) {
3939 	case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3940 	case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3941 		hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3942 		*ignore_acpi_ev = true;
3943 		break;
3944 
3945 	case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3946 	case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3947 		hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3948 		*ignore_acpi_ev = true;
3949 		break;
3950 
3951 	case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3952 	case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3953 		pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3954 		/* how to auto-heal: */
3955 		/* 2313: woke up from S3, go to S4/S5 */
3956 		/* 2413: woke up from S4, go to S5 */
3957 		break;
3958 
3959 	default:
3960 		return false;
3961 	}
3962 
3963 	if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3964 		pr_info("woke up due to a hot-unplug request...\n");
3965 		hotkey_wakeup_reason_notify_change();
3966 	}
3967 	return true;
3968 }
3969 
3970 static bool hotkey_notify_dockevent(const u32 hkey,
3971 				 bool *send_acpi_ev,
3972 				 bool *ignore_acpi_ev)
3973 {
3974 	/* 0x4000-0x4FFF: dock-related events */
3975 	*send_acpi_ev = true;
3976 	*ignore_acpi_ev = false;
3977 
3978 	switch (hkey) {
3979 	case TP_HKEY_EV_UNDOCK_ACK:
3980 		/* ACPI undock operation completed after wakeup */
3981 		hotkey_autosleep_ack = 1;
3982 		pr_info("undocked\n");
3983 		hotkey_wakeup_hotunplug_complete_notify_change();
3984 		return true;
3985 
3986 	case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3987 		pr_info("docked into hotplug port replicator\n");
3988 		return true;
3989 	case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3990 		pr_info("undocked from hotplug port replicator\n");
3991 		return true;
3992 
3993 	default:
3994 		return false;
3995 	}
3996 }
3997 
3998 static bool hotkey_notify_usrevent(const u32 hkey,
3999 				 bool *send_acpi_ev,
4000 				 bool *ignore_acpi_ev)
4001 {
4002 	/* 0x5000-0x5FFF: human interface helpers */
4003 	*send_acpi_ev = true;
4004 	*ignore_acpi_ev = false;
4005 
4006 	switch (hkey) {
4007 	case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
4008 	case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
4009 		return true;
4010 
4011 	case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
4012 	case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
4013 		tpacpi_input_send_tabletsw();
4014 		hotkey_tablet_mode_notify_change();
4015 		*send_acpi_ev = false;
4016 		return true;
4017 
4018 	case TP_HKEY_EV_LID_CLOSE:	/* Lid closed */
4019 	case TP_HKEY_EV_LID_OPEN:	/* Lid opened */
4020 	case TP_HKEY_EV_BRGHT_CHANGED:	/* brightness changed */
4021 		/* do not propagate these events */
4022 		*ignore_acpi_ev = true;
4023 		return true;
4024 
4025 	default:
4026 		return false;
4027 	}
4028 }
4029 
4030 static void thermal_dump_all_sensors(void);
4031 static void palmsensor_refresh(void);
4032 
4033 static bool hotkey_notify_6xxx(const u32 hkey,
4034 				 bool *send_acpi_ev,
4035 				 bool *ignore_acpi_ev)
4036 {
4037 	/* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
4038 	*send_acpi_ev = true;
4039 	*ignore_acpi_ev = false;
4040 
4041 	switch (hkey) {
4042 	case TP_HKEY_EV_THM_TABLE_CHANGED:
4043 		pr_debug("EC reports: Thermal Table has changed\n");
4044 		/* recommended action: do nothing, we don't have
4045 		 * Lenovo ATM information */
4046 		return true;
4047 	case TP_HKEY_EV_THM_CSM_COMPLETED:
4048 		pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n");
4049 		/* Thermal event - pass on to event handler */
4050 		tpacpi_driver_event(hkey);
4051 		return true;
4052 	case TP_HKEY_EV_THM_TRANSFM_CHANGED:
4053 		pr_debug("EC reports: Thermal Transformation changed (GMTS)\n");
4054 		/* recommended action: do nothing, we don't have
4055 		 * Lenovo ATM information */
4056 		return true;
4057 	case TP_HKEY_EV_ALARM_BAT_HOT:
4058 		pr_crit("THERMAL ALARM: battery is too hot!\n");
4059 		/* recommended action: warn user through gui */
4060 		break;
4061 	case TP_HKEY_EV_ALARM_BAT_XHOT:
4062 		pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
4063 		/* recommended action: immediate sleep/hibernate */
4064 		break;
4065 	case TP_HKEY_EV_ALARM_SENSOR_HOT:
4066 		pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n");
4067 		/* recommended action: warn user through gui, that */
4068 		/* some internal component is too hot */
4069 		break;
4070 	case TP_HKEY_EV_ALARM_SENSOR_XHOT:
4071 		pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n");
4072 		/* recommended action: immediate sleep/hibernate */
4073 		break;
4074 	case TP_HKEY_EV_AC_CHANGED:
4075 		/* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
4076 		 * AC status changed; can be triggered by plugging or
4077 		 * unplugging AC adapter, docking or undocking. */
4078 
4079 		fallthrough;
4080 
4081 	case TP_HKEY_EV_KEY_NUMLOCK:
4082 	case TP_HKEY_EV_KEY_FN:
4083 	case TP_HKEY_EV_KEY_FN_ESC:
4084 		/* key press events, we just ignore them as long as the EC
4085 		 * is still reporting them in the normal keyboard stream */
4086 		*send_acpi_ev = false;
4087 		*ignore_acpi_ev = true;
4088 		return true;
4089 
4090 	case TP_HKEY_EV_TABLET_CHANGED:
4091 		tpacpi_input_send_tabletsw();
4092 		hotkey_tablet_mode_notify_change();
4093 		*send_acpi_ev = false;
4094 		return true;
4095 
4096 	case TP_HKEY_EV_PALM_DETECTED:
4097 	case TP_HKEY_EV_PALM_UNDETECTED:
4098 		/* palm detected  - pass on to event handler */
4099 		palmsensor_refresh();
4100 		return true;
4101 
4102 	default:
4103 		/* report simply as unknown, no sensor dump */
4104 		return false;
4105 	}
4106 
4107 	thermal_dump_all_sensors();
4108 	return true;
4109 }
4110 
4111 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
4112 {
4113 	u32 hkey;
4114 	bool send_acpi_ev;
4115 	bool ignore_acpi_ev;
4116 	bool known_ev;
4117 
4118 	if (event != 0x80) {
4119 		pr_err("unknown HKEY notification event %d\n", event);
4120 		/* forward it to userspace, maybe it knows how to handle it */
4121 		acpi_bus_generate_netlink_event(
4122 					ibm->acpi->device->pnp.device_class,
4123 					dev_name(&ibm->acpi->device->dev),
4124 					event, 0);
4125 		return;
4126 	}
4127 
4128 	while (1) {
4129 		if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
4130 			pr_err("failed to retrieve HKEY event\n");
4131 			return;
4132 		}
4133 
4134 		if (hkey == 0) {
4135 			/* queue empty */
4136 			return;
4137 		}
4138 
4139 		send_acpi_ev = true;
4140 		ignore_acpi_ev = false;
4141 
4142 		switch (hkey >> 12) {
4143 		case 1:
4144 			/* 0x1000-0x1FFF: key presses */
4145 			known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
4146 						 &ignore_acpi_ev);
4147 			break;
4148 		case 2:
4149 			/* 0x2000-0x2FFF: Wakeup reason */
4150 			known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
4151 						 &ignore_acpi_ev);
4152 			break;
4153 		case 3:
4154 			/* 0x3000-0x3FFF: bay-related wakeups */
4155 			switch (hkey) {
4156 			case TP_HKEY_EV_BAYEJ_ACK:
4157 				hotkey_autosleep_ack = 1;
4158 				pr_info("bay ejected\n");
4159 				hotkey_wakeup_hotunplug_complete_notify_change();
4160 				known_ev = true;
4161 				break;
4162 			case TP_HKEY_EV_OPTDRV_EJ:
4163 				/* FIXME: kick libata if SATA link offline */
4164 				known_ev = true;
4165 				break;
4166 			default:
4167 				known_ev = false;
4168 			}
4169 			break;
4170 		case 4:
4171 			/* 0x4000-0x4FFF: dock-related events */
4172 			known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
4173 						&ignore_acpi_ev);
4174 			break;
4175 		case 5:
4176 			/* 0x5000-0x5FFF: human interface helpers */
4177 			known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
4178 						 &ignore_acpi_ev);
4179 			break;
4180 		case 6:
4181 			/* 0x6000-0x6FFF: thermal alarms/notices and
4182 			 *                keyboard events */
4183 			known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
4184 						 &ignore_acpi_ev);
4185 			break;
4186 		case 7:
4187 			/* 0x7000-0x7FFF: misc */
4188 			if (tp_features.hotkey_wlsw &&
4189 					hkey == TP_HKEY_EV_RFKILL_CHANGED) {
4190 				tpacpi_send_radiosw_update();
4191 				send_acpi_ev = 0;
4192 				known_ev = true;
4193 				break;
4194 			}
4195 			fallthrough;	/* to default */
4196 		default:
4197 			known_ev = false;
4198 		}
4199 		if (!known_ev) {
4200 			pr_notice("unhandled HKEY event 0x%04x\n", hkey);
4201 			pr_notice("please report the conditions when this event happened to %s\n",
4202 				  TPACPI_MAIL);
4203 		}
4204 
4205 		/* netlink events */
4206 		if (!ignore_acpi_ev && send_acpi_ev) {
4207 			acpi_bus_generate_netlink_event(
4208 					ibm->acpi->device->pnp.device_class,
4209 					dev_name(&ibm->acpi->device->dev),
4210 					event, hkey);
4211 		}
4212 	}
4213 }
4214 
4215 static void hotkey_suspend(void)
4216 {
4217 	/* Do these on suspend, we get the events on early resume! */
4218 	hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
4219 	hotkey_autosleep_ack = 0;
4220 
4221 	/* save previous mode of adaptive keyboard of X1 Carbon */
4222 	if (tp_features.has_adaptive_kbd) {
4223 		if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode,
4224 					"GTRW", "dd", 0)) {
4225 			pr_err("Cannot read adaptive keyboard mode.\n");
4226 		}
4227 	}
4228 }
4229 
4230 static void hotkey_resume(void)
4231 {
4232 	tpacpi_disable_brightness_delay();
4233 
4234 	if (hotkey_status_set(true) < 0 ||
4235 	    hotkey_mask_set(hotkey_acpi_mask) < 0)
4236 		pr_err("error while attempting to reset the event firmware interface\n");
4237 
4238 	tpacpi_send_radiosw_update();
4239 	tpacpi_input_send_tabletsw();
4240 	hotkey_tablet_mode_notify_change();
4241 	hotkey_wakeup_reason_notify_change();
4242 	hotkey_wakeup_hotunplug_complete_notify_change();
4243 	hotkey_poll_setup_safe(false);
4244 
4245 	/* restore previous mode of adapive keyboard of X1 Carbon */
4246 	if (tp_features.has_adaptive_kbd) {
4247 		if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd",
4248 					adaptive_keyboard_prev_mode)) {
4249 			pr_err("Cannot set adaptive keyboard mode.\n");
4250 		}
4251 	}
4252 }
4253 
4254 /* procfs -------------------------------------------------------------- */
4255 static int hotkey_read(struct seq_file *m)
4256 {
4257 	int res, status;
4258 
4259 	if (!tp_features.hotkey) {
4260 		seq_printf(m, "status:\t\tnot supported\n");
4261 		return 0;
4262 	}
4263 
4264 	if (mutex_lock_killable(&hotkey_mutex))
4265 		return -ERESTARTSYS;
4266 	res = hotkey_status_get(&status);
4267 	if (!res)
4268 		res = hotkey_mask_get();
4269 	mutex_unlock(&hotkey_mutex);
4270 	if (res)
4271 		return res;
4272 
4273 	seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
4274 	if (hotkey_all_mask) {
4275 		seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
4276 		seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
4277 	} else {
4278 		seq_printf(m, "mask:\t\tnot supported\n");
4279 		seq_printf(m, "commands:\tenable, disable, reset\n");
4280 	}
4281 
4282 	return 0;
4283 }
4284 
4285 static void hotkey_enabledisable_warn(bool enable)
4286 {
4287 	tpacpi_log_usertask("procfs hotkey enable/disable");
4288 	if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
4289 		  pr_fmt("hotkey enable/disable functionality has been removed from the driver.  Hotkeys are always enabled.\n")))
4290 		pr_err("Please remove the hotkey=enable module parameter, it is deprecated.  Hotkeys are always enabled.\n");
4291 }
4292 
4293 static int hotkey_write(char *buf)
4294 {
4295 	int res;
4296 	u32 mask;
4297 	char *cmd;
4298 
4299 	if (!tp_features.hotkey)
4300 		return -ENODEV;
4301 
4302 	if (mutex_lock_killable(&hotkey_mutex))
4303 		return -ERESTARTSYS;
4304 
4305 	mask = hotkey_user_mask;
4306 
4307 	res = 0;
4308 	while ((cmd = strsep(&buf, ","))) {
4309 		if (strlencmp(cmd, "enable") == 0) {
4310 			hotkey_enabledisable_warn(1);
4311 		} else if (strlencmp(cmd, "disable") == 0) {
4312 			hotkey_enabledisable_warn(0);
4313 			res = -EPERM;
4314 		} else if (strlencmp(cmd, "reset") == 0) {
4315 			mask = (hotkey_all_mask | hotkey_source_mask)
4316 				& ~hotkey_reserved_mask;
4317 		} else if (sscanf(cmd, "0x%x", &mask) == 1) {
4318 			/* mask set */
4319 		} else if (sscanf(cmd, "%x", &mask) == 1) {
4320 			/* mask set */
4321 		} else {
4322 			res = -EINVAL;
4323 			goto errexit;
4324 		}
4325 	}
4326 
4327 	if (!res) {
4328 		tpacpi_disclose_usertask("procfs hotkey",
4329 			"set mask to 0x%08x\n", mask);
4330 		res = hotkey_user_mask_set(mask);
4331 	}
4332 
4333 errexit:
4334 	mutex_unlock(&hotkey_mutex);
4335 	return res;
4336 }
4337 
4338 static const struct acpi_device_id ibm_htk_device_ids[] = {
4339 	{TPACPI_ACPI_IBM_HKEY_HID, 0},
4340 	{TPACPI_ACPI_LENOVO_HKEY_HID, 0},
4341 	{TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0},
4342 	{"", 0},
4343 };
4344 
4345 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
4346 	.hid = ibm_htk_device_ids,
4347 	.notify = hotkey_notify,
4348 	.handle = &hkey_handle,
4349 	.type = ACPI_DEVICE_NOTIFY,
4350 };
4351 
4352 static struct ibm_struct hotkey_driver_data = {
4353 	.name = "hotkey",
4354 	.read = hotkey_read,
4355 	.write = hotkey_write,
4356 	.exit = hotkey_exit,
4357 	.resume = hotkey_resume,
4358 	.suspend = hotkey_suspend,
4359 	.acpi = &ibm_hotkey_acpidriver,
4360 };
4361 
4362 /*************************************************************************
4363  * Bluetooth subdriver
4364  */
4365 
4366 enum {
4367 	/* ACPI GBDC/SBDC bits */
4368 	TP_ACPI_BLUETOOTH_HWPRESENT	= 0x01,	/* Bluetooth hw available */
4369 	TP_ACPI_BLUETOOTH_RADIOSSW	= 0x02,	/* Bluetooth radio enabled */
4370 	TP_ACPI_BLUETOOTH_RESUMECTRL	= 0x04,	/* Bluetooth state at resume:
4371 						   0 = disable, 1 = enable */
4372 };
4373 
4374 enum {
4375 	/* ACPI \BLTH commands */
4376 	TP_ACPI_BLTH_GET_ULTRAPORT_ID	= 0x00, /* Get Ultraport BT ID */
4377 	TP_ACPI_BLTH_GET_PWR_ON_RESUME	= 0x01, /* Get power-on-resume state */
4378 	TP_ACPI_BLTH_PWR_ON_ON_RESUME	= 0x02, /* Resume powered on */
4379 	TP_ACPI_BLTH_PWR_OFF_ON_RESUME	= 0x03,	/* Resume powered off */
4380 	TP_ACPI_BLTH_SAVE_STATE		= 0x05, /* Save state for S4/S5 */
4381 };
4382 
4383 #define TPACPI_RFK_BLUETOOTH_SW_NAME	"tpacpi_bluetooth_sw"
4384 
4385 static int bluetooth_get_status(void)
4386 {
4387 	int status;
4388 
4389 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4390 	if (dbg_bluetoothemul)
4391 		return (tpacpi_bluetooth_emulstate) ?
4392 		       TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4393 #endif
4394 
4395 	if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
4396 		return -EIO;
4397 
4398 	return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
4399 			TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4400 }
4401 
4402 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
4403 {
4404 	int status;
4405 
4406 	vdbg_printk(TPACPI_DBG_RFKILL,
4407 		"will attempt to %s bluetooth\n",
4408 		(state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4409 
4410 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4411 	if (dbg_bluetoothemul) {
4412 		tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
4413 		return 0;
4414 	}
4415 #endif
4416 
4417 	if (state == TPACPI_RFK_RADIO_ON)
4418 		status = TP_ACPI_BLUETOOTH_RADIOSSW
4419 			  | TP_ACPI_BLUETOOTH_RESUMECTRL;
4420 	else
4421 		status = 0;
4422 
4423 	if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
4424 		return -EIO;
4425 
4426 	return 0;
4427 }
4428 
4429 /* sysfs bluetooth enable ---------------------------------------------- */
4430 static ssize_t bluetooth_enable_show(struct device *dev,
4431 			   struct device_attribute *attr,
4432 			   char *buf)
4433 {
4434 	return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
4435 			attr, buf);
4436 }
4437 
4438 static ssize_t bluetooth_enable_store(struct device *dev,
4439 			    struct device_attribute *attr,
4440 			    const char *buf, size_t count)
4441 {
4442 	return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
4443 				attr, buf, count);
4444 }
4445 
4446 static DEVICE_ATTR_RW(bluetooth_enable);
4447 
4448 /* --------------------------------------------------------------------- */
4449 
4450 static struct attribute *bluetooth_attributes[] = {
4451 	&dev_attr_bluetooth_enable.attr,
4452 	NULL
4453 };
4454 
4455 static const struct attribute_group bluetooth_attr_group = {
4456 	.attrs = bluetooth_attributes,
4457 };
4458 
4459 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4460 	.get_status = bluetooth_get_status,
4461 	.set_status = bluetooth_set_status,
4462 };
4463 
4464 static void bluetooth_shutdown(void)
4465 {
4466 	/* Order firmware to save current state to NVRAM */
4467 	if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4468 			TP_ACPI_BLTH_SAVE_STATE))
4469 		pr_notice("failed to save bluetooth state to NVRAM\n");
4470 	else
4471 		vdbg_printk(TPACPI_DBG_RFKILL,
4472 			"bluetooth state saved to NVRAM\n");
4473 }
4474 
4475 static void bluetooth_exit(void)
4476 {
4477 	sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4478 			&bluetooth_attr_group);
4479 
4480 	tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4481 
4482 	bluetooth_shutdown();
4483 }
4484 
4485 static const struct dmi_system_id bt_fwbug_list[] __initconst = {
4486 	{
4487 		.ident = "ThinkPad E485",
4488 		.matches = {
4489 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4490 			DMI_MATCH(DMI_BOARD_NAME, "20KU"),
4491 		},
4492 	},
4493 	{
4494 		.ident = "ThinkPad E585",
4495 		.matches = {
4496 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4497 			DMI_MATCH(DMI_BOARD_NAME, "20KV"),
4498 		},
4499 	},
4500 	{
4501 		.ident = "ThinkPad A285 - 20MW",
4502 		.matches = {
4503 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4504 			DMI_MATCH(DMI_BOARD_NAME, "20MW"),
4505 		},
4506 	},
4507 	{
4508 		.ident = "ThinkPad A285 - 20MX",
4509 		.matches = {
4510 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4511 			DMI_MATCH(DMI_BOARD_NAME, "20MX"),
4512 		},
4513 	},
4514 	{
4515 		.ident = "ThinkPad A485 - 20MU",
4516 		.matches = {
4517 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4518 			DMI_MATCH(DMI_BOARD_NAME, "20MU"),
4519 		},
4520 	},
4521 	{
4522 		.ident = "ThinkPad A485 - 20MV",
4523 		.matches = {
4524 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4525 			DMI_MATCH(DMI_BOARD_NAME, "20MV"),
4526 		},
4527 	},
4528 	{}
4529 };
4530 
4531 static const struct pci_device_id fwbug_cards_ids[] __initconst = {
4532 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) },
4533 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) },
4534 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) },
4535 	{}
4536 };
4537 
4538 
4539 static int __init have_bt_fwbug(void)
4540 {
4541 	/*
4542 	 * Some AMD based ThinkPads have a firmware bug that calling
4543 	 * "GBDC" will cause bluetooth on Intel wireless cards blocked
4544 	 */
4545 	if (dmi_check_system(bt_fwbug_list) && pci_dev_present(fwbug_cards_ids)) {
4546 		vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4547 			FW_BUG "disable bluetooth subdriver for Intel cards\n");
4548 		return 1;
4549 	} else
4550 		return 0;
4551 }
4552 
4553 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4554 {
4555 	int res;
4556 	int status = 0;
4557 
4558 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4559 			"initializing bluetooth subdriver\n");
4560 
4561 	TPACPI_ACPIHANDLE_INIT(hkey);
4562 
4563 	/* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4564 	   G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4565 	tp_features.bluetooth = !have_bt_fwbug() && hkey_handle &&
4566 	    acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4567 
4568 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4569 		"bluetooth is %s, status 0x%02x\n",
4570 		str_supported(tp_features.bluetooth),
4571 		status);
4572 
4573 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4574 	if (dbg_bluetoothemul) {
4575 		tp_features.bluetooth = 1;
4576 		pr_info("bluetooth switch emulation enabled\n");
4577 	} else
4578 #endif
4579 	if (tp_features.bluetooth &&
4580 	    !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4581 		/* no bluetooth hardware present in system */
4582 		tp_features.bluetooth = 0;
4583 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4584 			   "bluetooth hardware not installed\n");
4585 	}
4586 
4587 	if (!tp_features.bluetooth)
4588 		return 1;
4589 
4590 	res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4591 				&bluetooth_tprfk_ops,
4592 				RFKILL_TYPE_BLUETOOTH,
4593 				TPACPI_RFK_BLUETOOTH_SW_NAME,
4594 				true);
4595 	if (res)
4596 		return res;
4597 
4598 	res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4599 				&bluetooth_attr_group);
4600 	if (res) {
4601 		tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4602 		return res;
4603 	}
4604 
4605 	return 0;
4606 }
4607 
4608 /* procfs -------------------------------------------------------------- */
4609 static int bluetooth_read(struct seq_file *m)
4610 {
4611 	return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4612 }
4613 
4614 static int bluetooth_write(char *buf)
4615 {
4616 	return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4617 }
4618 
4619 static struct ibm_struct bluetooth_driver_data = {
4620 	.name = "bluetooth",
4621 	.read = bluetooth_read,
4622 	.write = bluetooth_write,
4623 	.exit = bluetooth_exit,
4624 	.shutdown = bluetooth_shutdown,
4625 };
4626 
4627 /*************************************************************************
4628  * Wan subdriver
4629  */
4630 
4631 enum {
4632 	/* ACPI GWAN/SWAN bits */
4633 	TP_ACPI_WANCARD_HWPRESENT	= 0x01,	/* Wan hw available */
4634 	TP_ACPI_WANCARD_RADIOSSW	= 0x02,	/* Wan radio enabled */
4635 	TP_ACPI_WANCARD_RESUMECTRL	= 0x04,	/* Wan state at resume:
4636 						   0 = disable, 1 = enable */
4637 };
4638 
4639 #define TPACPI_RFK_WWAN_SW_NAME		"tpacpi_wwan_sw"
4640 
4641 static int wan_get_status(void)
4642 {
4643 	int status;
4644 
4645 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4646 	if (dbg_wwanemul)
4647 		return (tpacpi_wwan_emulstate) ?
4648 		       TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4649 #endif
4650 
4651 	if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4652 		return -EIO;
4653 
4654 	return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4655 			TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4656 }
4657 
4658 static int wan_set_status(enum tpacpi_rfkill_state state)
4659 {
4660 	int status;
4661 
4662 	vdbg_printk(TPACPI_DBG_RFKILL,
4663 		"will attempt to %s wwan\n",
4664 		(state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4665 
4666 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4667 	if (dbg_wwanemul) {
4668 		tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4669 		return 0;
4670 	}
4671 #endif
4672 
4673 	if (state == TPACPI_RFK_RADIO_ON)
4674 		status = TP_ACPI_WANCARD_RADIOSSW
4675 			 | TP_ACPI_WANCARD_RESUMECTRL;
4676 	else
4677 		status = 0;
4678 
4679 	if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4680 		return -EIO;
4681 
4682 	return 0;
4683 }
4684 
4685 /* sysfs wan enable ---------------------------------------------------- */
4686 static ssize_t wan_enable_show(struct device *dev,
4687 			   struct device_attribute *attr,
4688 			   char *buf)
4689 {
4690 	return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4691 			attr, buf);
4692 }
4693 
4694 static ssize_t wan_enable_store(struct device *dev,
4695 			    struct device_attribute *attr,
4696 			    const char *buf, size_t count)
4697 {
4698 	return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4699 			attr, buf, count);
4700 }
4701 
4702 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4703 		   wan_enable_show, wan_enable_store);
4704 
4705 /* --------------------------------------------------------------------- */
4706 
4707 static struct attribute *wan_attributes[] = {
4708 	&dev_attr_wwan_enable.attr,
4709 	NULL
4710 };
4711 
4712 static const struct attribute_group wan_attr_group = {
4713 	.attrs = wan_attributes,
4714 };
4715 
4716 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4717 	.get_status = wan_get_status,
4718 	.set_status = wan_set_status,
4719 };
4720 
4721 static void wan_shutdown(void)
4722 {
4723 	/* Order firmware to save current state to NVRAM */
4724 	if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4725 			TP_ACPI_WGSV_SAVE_STATE))
4726 		pr_notice("failed to save WWAN state to NVRAM\n");
4727 	else
4728 		vdbg_printk(TPACPI_DBG_RFKILL,
4729 			"WWAN state saved to NVRAM\n");
4730 }
4731 
4732 static void wan_exit(void)
4733 {
4734 	sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4735 		&wan_attr_group);
4736 
4737 	tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4738 
4739 	wan_shutdown();
4740 }
4741 
4742 static int __init wan_init(struct ibm_init_struct *iibm)
4743 {
4744 	int res;
4745 	int status = 0;
4746 
4747 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4748 			"initializing wan subdriver\n");
4749 
4750 	TPACPI_ACPIHANDLE_INIT(hkey);
4751 
4752 	tp_features.wan = hkey_handle &&
4753 	    acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4754 
4755 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4756 		"wan is %s, status 0x%02x\n",
4757 		str_supported(tp_features.wan),
4758 		status);
4759 
4760 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4761 	if (dbg_wwanemul) {
4762 		tp_features.wan = 1;
4763 		pr_info("wwan switch emulation enabled\n");
4764 	} else
4765 #endif
4766 	if (tp_features.wan &&
4767 	    !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4768 		/* no wan hardware present in system */
4769 		tp_features.wan = 0;
4770 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4771 			   "wan hardware not installed\n");
4772 	}
4773 
4774 	if (!tp_features.wan)
4775 		return 1;
4776 
4777 	res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4778 				&wan_tprfk_ops,
4779 				RFKILL_TYPE_WWAN,
4780 				TPACPI_RFK_WWAN_SW_NAME,
4781 				true);
4782 	if (res)
4783 		return res;
4784 
4785 	res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4786 				&wan_attr_group);
4787 
4788 	if (res) {
4789 		tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4790 		return res;
4791 	}
4792 
4793 	return 0;
4794 }
4795 
4796 /* procfs -------------------------------------------------------------- */
4797 static int wan_read(struct seq_file *m)
4798 {
4799 	return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4800 }
4801 
4802 static int wan_write(char *buf)
4803 {
4804 	return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4805 }
4806 
4807 static struct ibm_struct wan_driver_data = {
4808 	.name = "wan",
4809 	.read = wan_read,
4810 	.write = wan_write,
4811 	.exit = wan_exit,
4812 	.shutdown = wan_shutdown,
4813 };
4814 
4815 /*************************************************************************
4816  * UWB subdriver
4817  */
4818 
4819 enum {
4820 	/* ACPI GUWB/SUWB bits */
4821 	TP_ACPI_UWB_HWPRESENT	= 0x01,	/* UWB hw available */
4822 	TP_ACPI_UWB_RADIOSSW	= 0x02,	/* UWB radio enabled */
4823 };
4824 
4825 #define TPACPI_RFK_UWB_SW_NAME	"tpacpi_uwb_sw"
4826 
4827 static int uwb_get_status(void)
4828 {
4829 	int status;
4830 
4831 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4832 	if (dbg_uwbemul)
4833 		return (tpacpi_uwb_emulstate) ?
4834 		       TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4835 #endif
4836 
4837 	if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4838 		return -EIO;
4839 
4840 	return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4841 			TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4842 }
4843 
4844 static int uwb_set_status(enum tpacpi_rfkill_state state)
4845 {
4846 	int status;
4847 
4848 	vdbg_printk(TPACPI_DBG_RFKILL,
4849 		"will attempt to %s UWB\n",
4850 		(state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4851 
4852 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4853 	if (dbg_uwbemul) {
4854 		tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4855 		return 0;
4856 	}
4857 #endif
4858 
4859 	if (state == TPACPI_RFK_RADIO_ON)
4860 		status = TP_ACPI_UWB_RADIOSSW;
4861 	else
4862 		status = 0;
4863 
4864 	if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4865 		return -EIO;
4866 
4867 	return 0;
4868 }
4869 
4870 /* --------------------------------------------------------------------- */
4871 
4872 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4873 	.get_status = uwb_get_status,
4874 	.set_status = uwb_set_status,
4875 };
4876 
4877 static void uwb_exit(void)
4878 {
4879 	tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4880 }
4881 
4882 static int __init uwb_init(struct ibm_init_struct *iibm)
4883 {
4884 	int res;
4885 	int status = 0;
4886 
4887 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4888 			"initializing uwb subdriver\n");
4889 
4890 	TPACPI_ACPIHANDLE_INIT(hkey);
4891 
4892 	tp_features.uwb = hkey_handle &&
4893 	    acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4894 
4895 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4896 		"uwb is %s, status 0x%02x\n",
4897 		str_supported(tp_features.uwb),
4898 		status);
4899 
4900 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4901 	if (dbg_uwbemul) {
4902 		tp_features.uwb = 1;
4903 		pr_info("uwb switch emulation enabled\n");
4904 	} else
4905 #endif
4906 	if (tp_features.uwb &&
4907 	    !(status & TP_ACPI_UWB_HWPRESENT)) {
4908 		/* no uwb hardware present in system */
4909 		tp_features.uwb = 0;
4910 		dbg_printk(TPACPI_DBG_INIT,
4911 			   "uwb hardware not installed\n");
4912 	}
4913 
4914 	if (!tp_features.uwb)
4915 		return 1;
4916 
4917 	res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4918 				&uwb_tprfk_ops,
4919 				RFKILL_TYPE_UWB,
4920 				TPACPI_RFK_UWB_SW_NAME,
4921 				false);
4922 	return res;
4923 }
4924 
4925 static struct ibm_struct uwb_driver_data = {
4926 	.name = "uwb",
4927 	.exit = uwb_exit,
4928 	.flags.experimental = 1,
4929 };
4930 
4931 /*************************************************************************
4932  * Video subdriver
4933  */
4934 
4935 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4936 
4937 enum video_access_mode {
4938 	TPACPI_VIDEO_NONE = 0,
4939 	TPACPI_VIDEO_570,	/* 570 */
4940 	TPACPI_VIDEO_770,	/* 600e/x, 770e, 770x */
4941 	TPACPI_VIDEO_NEW,	/* all others */
4942 };
4943 
4944 enum {	/* video status flags, based on VIDEO_570 */
4945 	TP_ACPI_VIDEO_S_LCD = 0x01,	/* LCD output enabled */
4946 	TP_ACPI_VIDEO_S_CRT = 0x02,	/* CRT output enabled */
4947 	TP_ACPI_VIDEO_S_DVI = 0x08,	/* DVI output enabled */
4948 };
4949 
4950 enum {  /* TPACPI_VIDEO_570 constants */
4951 	TP_ACPI_VIDEO_570_PHSCMD = 0x87,	/* unknown magic constant :( */
4952 	TP_ACPI_VIDEO_570_PHSMASK = 0x03,	/* PHS bits that map to
4953 						 * video_status_flags */
4954 	TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,	/* unknown magic constant :( */
4955 	TP_ACPI_VIDEO_570_PHS2SET = 0x80,	/* unknown magic constant :( */
4956 };
4957 
4958 static enum video_access_mode video_supported;
4959 static int video_orig_autosw;
4960 
4961 static int video_autosw_get(void);
4962 static int video_autosw_set(int enable);
4963 
4964 TPACPI_HANDLE(vid, root,
4965 	      "\\_SB.PCI.AGP.VGA",	/* 570 */
4966 	      "\\_SB.PCI0.AGP0.VID0",	/* 600e/x, 770x */
4967 	      "\\_SB.PCI0.VID0",	/* 770e */
4968 	      "\\_SB.PCI0.VID",		/* A21e, G4x, R50e, X30, X40 */
4969 	      "\\_SB.PCI0.AGP.VGA",	/* X100e and a few others */
4970 	      "\\_SB.PCI0.AGP.VID",	/* all others */
4971 	);				/* R30, R31 */
4972 
4973 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");	/* G41 */
4974 
4975 static int __init video_init(struct ibm_init_struct *iibm)
4976 {
4977 	int ivga;
4978 
4979 	vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4980 
4981 	TPACPI_ACPIHANDLE_INIT(vid);
4982 	if (tpacpi_is_ibm())
4983 		TPACPI_ACPIHANDLE_INIT(vid2);
4984 
4985 	if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4986 		/* G41, assume IVGA doesn't change */
4987 		vid_handle = vid2_handle;
4988 
4989 	if (!vid_handle)
4990 		/* video switching not supported on R30, R31 */
4991 		video_supported = TPACPI_VIDEO_NONE;
4992 	else if (tpacpi_is_ibm() &&
4993 		 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4994 		/* 570 */
4995 		video_supported = TPACPI_VIDEO_570;
4996 	else if (tpacpi_is_ibm() &&
4997 		 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4998 		/* 600e/x, 770e, 770x */
4999 		video_supported = TPACPI_VIDEO_770;
5000 	else
5001 		/* all others */
5002 		video_supported = TPACPI_VIDEO_NEW;
5003 
5004 	vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
5005 		str_supported(video_supported != TPACPI_VIDEO_NONE),
5006 		video_supported);
5007 
5008 	return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1;
5009 }
5010 
5011 static void video_exit(void)
5012 {
5013 	dbg_printk(TPACPI_DBG_EXIT,
5014 		   "restoring original video autoswitch mode\n");
5015 	if (video_autosw_set(video_orig_autosw))
5016 		pr_err("error while trying to restore original video autoswitch mode\n");
5017 }
5018 
5019 static int video_outputsw_get(void)
5020 {
5021 	int status = 0;
5022 	int i;
5023 
5024 	switch (video_supported) {
5025 	case TPACPI_VIDEO_570:
5026 		if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
5027 				 TP_ACPI_VIDEO_570_PHSCMD))
5028 			return -EIO;
5029 		status = i & TP_ACPI_VIDEO_570_PHSMASK;
5030 		break;
5031 	case TPACPI_VIDEO_770:
5032 		if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
5033 			return -EIO;
5034 		if (i)
5035 			status |= TP_ACPI_VIDEO_S_LCD;
5036 		if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
5037 			return -EIO;
5038 		if (i)
5039 			status |= TP_ACPI_VIDEO_S_CRT;
5040 		break;
5041 	case TPACPI_VIDEO_NEW:
5042 		if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
5043 		    !acpi_evalf(NULL, &i, "\\VCDC", "d"))
5044 			return -EIO;
5045 		if (i)
5046 			status |= TP_ACPI_VIDEO_S_CRT;
5047 
5048 		if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
5049 		    !acpi_evalf(NULL, &i, "\\VCDL", "d"))
5050 			return -EIO;
5051 		if (i)
5052 			status |= TP_ACPI_VIDEO_S_LCD;
5053 		if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
5054 			return -EIO;
5055 		if (i)
5056 			status |= TP_ACPI_VIDEO_S_DVI;
5057 		break;
5058 	default:
5059 		return -ENOSYS;
5060 	}
5061 
5062 	return status;
5063 }
5064 
5065 static int video_outputsw_set(int status)
5066 {
5067 	int autosw;
5068 	int res = 0;
5069 
5070 	switch (video_supported) {
5071 	case TPACPI_VIDEO_570:
5072 		res = acpi_evalf(NULL, NULL,
5073 				 "\\_SB.PHS2", "vdd",
5074 				 TP_ACPI_VIDEO_570_PHS2CMD,
5075 				 status | TP_ACPI_VIDEO_570_PHS2SET);
5076 		break;
5077 	case TPACPI_VIDEO_770:
5078 		autosw = video_autosw_get();
5079 		if (autosw < 0)
5080 			return autosw;
5081 
5082 		res = video_autosw_set(1);
5083 		if (res)
5084 			return res;
5085 		res = acpi_evalf(vid_handle, NULL,
5086 				 "ASWT", "vdd", status * 0x100, 0);
5087 		if (!autosw && video_autosw_set(autosw)) {
5088 			pr_err("video auto-switch left enabled due to error\n");
5089 			return -EIO;
5090 		}
5091 		break;
5092 	case TPACPI_VIDEO_NEW:
5093 		res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
5094 		      acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
5095 		break;
5096 	default:
5097 		return -ENOSYS;
5098 	}
5099 
5100 	return (res) ? 0 : -EIO;
5101 }
5102 
5103 static int video_autosw_get(void)
5104 {
5105 	int autosw = 0;
5106 
5107 	switch (video_supported) {
5108 	case TPACPI_VIDEO_570:
5109 		if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
5110 			return -EIO;
5111 		break;
5112 	case TPACPI_VIDEO_770:
5113 	case TPACPI_VIDEO_NEW:
5114 		if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
5115 			return -EIO;
5116 		break;
5117 	default:
5118 		return -ENOSYS;
5119 	}
5120 
5121 	return autosw & 1;
5122 }
5123 
5124 static int video_autosw_set(int enable)
5125 {
5126 	if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
5127 		return -EIO;
5128 	return 0;
5129 }
5130 
5131 static int video_outputsw_cycle(void)
5132 {
5133 	int autosw = video_autosw_get();
5134 	int res;
5135 
5136 	if (autosw < 0)
5137 		return autosw;
5138 
5139 	switch (video_supported) {
5140 	case TPACPI_VIDEO_570:
5141 		res = video_autosw_set(1);
5142 		if (res)
5143 			return res;
5144 		res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
5145 		break;
5146 	case TPACPI_VIDEO_770:
5147 	case TPACPI_VIDEO_NEW:
5148 		res = video_autosw_set(1);
5149 		if (res)
5150 			return res;
5151 		res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
5152 		break;
5153 	default:
5154 		return -ENOSYS;
5155 	}
5156 	if (!autosw && video_autosw_set(autosw)) {
5157 		pr_err("video auto-switch left enabled due to error\n");
5158 		return -EIO;
5159 	}
5160 
5161 	return (res) ? 0 : -EIO;
5162 }
5163 
5164 static int video_expand_toggle(void)
5165 {
5166 	switch (video_supported) {
5167 	case TPACPI_VIDEO_570:
5168 		return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
5169 			0 : -EIO;
5170 	case TPACPI_VIDEO_770:
5171 		return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
5172 			0 : -EIO;
5173 	case TPACPI_VIDEO_NEW:
5174 		return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
5175 			0 : -EIO;
5176 	default:
5177 		return -ENOSYS;
5178 	}
5179 	/* not reached */
5180 }
5181 
5182 static int video_read(struct seq_file *m)
5183 {
5184 	int status, autosw;
5185 
5186 	if (video_supported == TPACPI_VIDEO_NONE) {
5187 		seq_printf(m, "status:\t\tnot supported\n");
5188 		return 0;
5189 	}
5190 
5191 	/* Even reads can crash X.org, so... */
5192 	if (!capable(CAP_SYS_ADMIN))
5193 		return -EPERM;
5194 
5195 	status = video_outputsw_get();
5196 	if (status < 0)
5197 		return status;
5198 
5199 	autosw = video_autosw_get();
5200 	if (autosw < 0)
5201 		return autosw;
5202 
5203 	seq_printf(m, "status:\t\tsupported\n");
5204 	seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
5205 	seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
5206 	if (video_supported == TPACPI_VIDEO_NEW)
5207 		seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
5208 	seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
5209 	seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
5210 	seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
5211 	if (video_supported == TPACPI_VIDEO_NEW)
5212 		seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
5213 	seq_printf(m, "commands:\tauto_enable, auto_disable\n");
5214 	seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
5215 
5216 	return 0;
5217 }
5218 
5219 static int video_write(char *buf)
5220 {
5221 	char *cmd;
5222 	int enable, disable, status;
5223 	int res;
5224 
5225 	if (video_supported == TPACPI_VIDEO_NONE)
5226 		return -ENODEV;
5227 
5228 	/* Even reads can crash X.org, let alone writes... */
5229 	if (!capable(CAP_SYS_ADMIN))
5230 		return -EPERM;
5231 
5232 	enable = 0;
5233 	disable = 0;
5234 
5235 	while ((cmd = strsep(&buf, ","))) {
5236 		if (strlencmp(cmd, "lcd_enable") == 0) {
5237 			enable |= TP_ACPI_VIDEO_S_LCD;
5238 		} else if (strlencmp(cmd, "lcd_disable") == 0) {
5239 			disable |= TP_ACPI_VIDEO_S_LCD;
5240 		} else if (strlencmp(cmd, "crt_enable") == 0) {
5241 			enable |= TP_ACPI_VIDEO_S_CRT;
5242 		} else if (strlencmp(cmd, "crt_disable") == 0) {
5243 			disable |= TP_ACPI_VIDEO_S_CRT;
5244 		} else if (video_supported == TPACPI_VIDEO_NEW &&
5245 			   strlencmp(cmd, "dvi_enable") == 0) {
5246 			enable |= TP_ACPI_VIDEO_S_DVI;
5247 		} else if (video_supported == TPACPI_VIDEO_NEW &&
5248 			   strlencmp(cmd, "dvi_disable") == 0) {
5249 			disable |= TP_ACPI_VIDEO_S_DVI;
5250 		} else if (strlencmp(cmd, "auto_enable") == 0) {
5251 			res = video_autosw_set(1);
5252 			if (res)
5253 				return res;
5254 		} else if (strlencmp(cmd, "auto_disable") == 0) {
5255 			res = video_autosw_set(0);
5256 			if (res)
5257 				return res;
5258 		} else if (strlencmp(cmd, "video_switch") == 0) {
5259 			res = video_outputsw_cycle();
5260 			if (res)
5261 				return res;
5262 		} else if (strlencmp(cmd, "expand_toggle") == 0) {
5263 			res = video_expand_toggle();
5264 			if (res)
5265 				return res;
5266 		} else
5267 			return -EINVAL;
5268 	}
5269 
5270 	if (enable || disable) {
5271 		status = video_outputsw_get();
5272 		if (status < 0)
5273 			return status;
5274 		res = video_outputsw_set((status & ~disable) | enable);
5275 		if (res)
5276 			return res;
5277 	}
5278 
5279 	return 0;
5280 }
5281 
5282 static struct ibm_struct video_driver_data = {
5283 	.name = "video",
5284 	.read = video_read,
5285 	.write = video_write,
5286 	.exit = video_exit,
5287 };
5288 
5289 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
5290 
5291 /*************************************************************************
5292  * Keyboard backlight subdriver
5293  */
5294 
5295 static enum led_brightness kbdlight_brightness;
5296 static DEFINE_MUTEX(kbdlight_mutex);
5297 
5298 static int kbdlight_set_level(int level)
5299 {
5300 	int ret = 0;
5301 
5302 	if (!hkey_handle)
5303 		return -ENXIO;
5304 
5305 	mutex_lock(&kbdlight_mutex);
5306 
5307 	if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
5308 		ret = -EIO;
5309 	else
5310 		kbdlight_brightness = level;
5311 
5312 	mutex_unlock(&kbdlight_mutex);
5313 
5314 	return ret;
5315 }
5316 
5317 static int kbdlight_get_level(void)
5318 {
5319 	int status = 0;
5320 
5321 	if (!hkey_handle)
5322 		return -ENXIO;
5323 
5324 	if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0))
5325 		return -EIO;
5326 
5327 	if (status < 0)
5328 		return status;
5329 
5330 	return status & 0x3;
5331 }
5332 
5333 static bool kbdlight_is_supported(void)
5334 {
5335 	int status = 0;
5336 
5337 	if (!hkey_handle)
5338 		return false;
5339 
5340 	if (!acpi_has_method(hkey_handle, "MLCG")) {
5341 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n");
5342 		return false;
5343 	}
5344 
5345 	if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) {
5346 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n");
5347 		return false;
5348 	}
5349 
5350 	if (status < 0) {
5351 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status);
5352 		return false;
5353 	}
5354 
5355 	vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status);
5356 	/*
5357 	 * Guessed test for keyboard backlight:
5358 	 *
5359 	 * Machines with backlight keyboard return:
5360 	 *   b010100000010000000XX - ThinkPad X1 Carbon 3rd
5361 	 *   b110100010010000000XX - ThinkPad x230
5362 	 *   b010100000010000000XX - ThinkPad x240
5363 	 *   b010100000010000000XX - ThinkPad W541
5364 	 * (XX is current backlight level)
5365 	 *
5366 	 * Machines without backlight keyboard return:
5367 	 *   b10100001000000000000 - ThinkPad x230
5368 	 *   b10110001000000000000 - ThinkPad E430
5369 	 *   b00000000000000000000 - ThinkPad E450
5370 	 *
5371 	 * Candidate BITs for detection test (XOR):
5372 	 *   b01000000001000000000
5373 	 *              ^
5374 	 */
5375 	return status & BIT(9);
5376 }
5377 
5378 static int kbdlight_sysfs_set(struct led_classdev *led_cdev,
5379 			enum led_brightness brightness)
5380 {
5381 	return kbdlight_set_level(brightness);
5382 }
5383 
5384 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev)
5385 {
5386 	int level;
5387 
5388 	level = kbdlight_get_level();
5389 	if (level < 0)
5390 		return 0;
5391 
5392 	return level;
5393 }
5394 
5395 static struct tpacpi_led_classdev tpacpi_led_kbdlight = {
5396 	.led_classdev = {
5397 		.name		= "tpacpi::kbd_backlight",
5398 		.max_brightness	= 2,
5399 		.flags		= LED_BRIGHT_HW_CHANGED,
5400 		.brightness_set_blocking = &kbdlight_sysfs_set,
5401 		.brightness_get	= &kbdlight_sysfs_get,
5402 	}
5403 };
5404 
5405 static int __init kbdlight_init(struct ibm_init_struct *iibm)
5406 {
5407 	int rc;
5408 
5409 	vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n");
5410 
5411 	TPACPI_ACPIHANDLE_INIT(hkey);
5412 
5413 	if (!kbdlight_is_supported()) {
5414 		tp_features.kbdlight = 0;
5415 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
5416 		return 1;
5417 	}
5418 
5419 	kbdlight_brightness = kbdlight_sysfs_get(NULL);
5420 	tp_features.kbdlight = 1;
5421 
5422 	rc = led_classdev_register(&tpacpi_pdev->dev,
5423 				   &tpacpi_led_kbdlight.led_classdev);
5424 	if (rc < 0) {
5425 		tp_features.kbdlight = 0;
5426 		return rc;
5427 	}
5428 
5429 	tpacpi_hotkey_driver_mask_set(hotkey_driver_mask |
5430 				      TP_ACPI_HKEY_KBD_LIGHT_MASK);
5431 	return 0;
5432 }
5433 
5434 static void kbdlight_exit(void)
5435 {
5436 	led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev);
5437 }
5438 
5439 static int kbdlight_set_level_and_update(int level)
5440 {
5441 	int ret;
5442 	struct led_classdev *led_cdev;
5443 
5444 	ret = kbdlight_set_level(level);
5445 	led_cdev = &tpacpi_led_kbdlight.led_classdev;
5446 
5447 	if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED))
5448 		led_cdev->brightness = level;
5449 
5450 	return ret;
5451 }
5452 
5453 static int kbdlight_read(struct seq_file *m)
5454 {
5455 	int level;
5456 
5457 	if (!tp_features.kbdlight) {
5458 		seq_printf(m, "status:\t\tnot supported\n");
5459 	} else {
5460 		level = kbdlight_get_level();
5461 		if (level < 0)
5462 			seq_printf(m, "status:\t\terror %d\n", level);
5463 		else
5464 			seq_printf(m, "status:\t\t%d\n", level);
5465 		seq_printf(m, "commands:\t0, 1, 2\n");
5466 	}
5467 
5468 	return 0;
5469 }
5470 
5471 static int kbdlight_write(char *buf)
5472 {
5473 	char *cmd;
5474 	int res, level = -EINVAL;
5475 
5476 	if (!tp_features.kbdlight)
5477 		return -ENODEV;
5478 
5479 	while ((cmd = strsep(&buf, ","))) {
5480 		res = kstrtoint(cmd, 10, &level);
5481 		if (res < 0)
5482 			return res;
5483 	}
5484 
5485 	if (level >= 3 || level < 0)
5486 		return -EINVAL;
5487 
5488 	return kbdlight_set_level_and_update(level);
5489 }
5490 
5491 static void kbdlight_suspend(void)
5492 {
5493 	struct led_classdev *led_cdev;
5494 
5495 	if (!tp_features.kbdlight)
5496 		return;
5497 
5498 	led_cdev = &tpacpi_led_kbdlight.led_classdev;
5499 	led_update_brightness(led_cdev);
5500 	led_classdev_suspend(led_cdev);
5501 }
5502 
5503 static void kbdlight_resume(void)
5504 {
5505 	if (!tp_features.kbdlight)
5506 		return;
5507 
5508 	led_classdev_resume(&tpacpi_led_kbdlight.led_classdev);
5509 }
5510 
5511 static struct ibm_struct kbdlight_driver_data = {
5512 	.name = "kbdlight",
5513 	.read = kbdlight_read,
5514 	.write = kbdlight_write,
5515 	.suspend = kbdlight_suspend,
5516 	.resume = kbdlight_resume,
5517 	.exit = kbdlight_exit,
5518 };
5519 
5520 /*************************************************************************
5521  * Light (thinklight) subdriver
5522  */
5523 
5524 TPACPI_HANDLE(lght, root, "\\LGHT");	/* A21e, A2xm/p, T20-22, X20-21 */
5525 TPACPI_HANDLE(ledb, ec, "LEDB");		/* G4x */
5526 
5527 static int light_get_status(void)
5528 {
5529 	int status = 0;
5530 
5531 	if (tp_features.light_status) {
5532 		if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
5533 			return -EIO;
5534 		return (!!status);
5535 	}
5536 
5537 	return -ENXIO;
5538 }
5539 
5540 static int light_set_status(int status)
5541 {
5542 	int rc;
5543 
5544 	if (tp_features.light) {
5545 		if (cmos_handle) {
5546 			rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
5547 					(status) ?
5548 						TP_CMOS_THINKLIGHT_ON :
5549 						TP_CMOS_THINKLIGHT_OFF);
5550 		} else {
5551 			rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
5552 					(status) ? 1 : 0);
5553 		}
5554 		return (rc) ? 0 : -EIO;
5555 	}
5556 
5557 	return -ENXIO;
5558 }
5559 
5560 static int light_sysfs_set(struct led_classdev *led_cdev,
5561 			enum led_brightness brightness)
5562 {
5563 	return light_set_status((brightness != LED_OFF) ?
5564 				TPACPI_LED_ON : TPACPI_LED_OFF);
5565 }
5566 
5567 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
5568 {
5569 	return (light_get_status() == 1) ? LED_FULL : LED_OFF;
5570 }
5571 
5572 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
5573 	.led_classdev = {
5574 		.name		= "tpacpi::thinklight",
5575 		.brightness_set_blocking = &light_sysfs_set,
5576 		.brightness_get	= &light_sysfs_get,
5577 	}
5578 };
5579 
5580 static int __init light_init(struct ibm_init_struct *iibm)
5581 {
5582 	int rc;
5583 
5584 	vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
5585 
5586 	if (tpacpi_is_ibm()) {
5587 		TPACPI_ACPIHANDLE_INIT(ledb);
5588 		TPACPI_ACPIHANDLE_INIT(lght);
5589 	}
5590 	TPACPI_ACPIHANDLE_INIT(cmos);
5591 
5592 	/* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
5593 	tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
5594 
5595 	if (tp_features.light)
5596 		/* light status not supported on
5597 		   570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
5598 		tp_features.light_status =
5599 			acpi_evalf(ec_handle, NULL, "KBLT", "qv");
5600 
5601 	vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
5602 		str_supported(tp_features.light),
5603 		str_supported(tp_features.light_status));
5604 
5605 	if (!tp_features.light)
5606 		return 1;
5607 
5608 	rc = led_classdev_register(&tpacpi_pdev->dev,
5609 				   &tpacpi_led_thinklight.led_classdev);
5610 
5611 	if (rc < 0) {
5612 		tp_features.light = 0;
5613 		tp_features.light_status = 0;
5614 	} else  {
5615 		rc = 0;
5616 	}
5617 
5618 	return rc;
5619 }
5620 
5621 static void light_exit(void)
5622 {
5623 	led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
5624 }
5625 
5626 static int light_read(struct seq_file *m)
5627 {
5628 	int status;
5629 
5630 	if (!tp_features.light) {
5631 		seq_printf(m, "status:\t\tnot supported\n");
5632 	} else if (!tp_features.light_status) {
5633 		seq_printf(m, "status:\t\tunknown\n");
5634 		seq_printf(m, "commands:\ton, off\n");
5635 	} else {
5636 		status = light_get_status();
5637 		if (status < 0)
5638 			return status;
5639 		seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
5640 		seq_printf(m, "commands:\ton, off\n");
5641 	}
5642 
5643 	return 0;
5644 }
5645 
5646 static int light_write(char *buf)
5647 {
5648 	char *cmd;
5649 	int newstatus = 0;
5650 
5651 	if (!tp_features.light)
5652 		return -ENODEV;
5653 
5654 	while ((cmd = strsep(&buf, ","))) {
5655 		if (strlencmp(cmd, "on") == 0) {
5656 			newstatus = 1;
5657 		} else if (strlencmp(cmd, "off") == 0) {
5658 			newstatus = 0;
5659 		} else
5660 			return -EINVAL;
5661 	}
5662 
5663 	return light_set_status(newstatus);
5664 }
5665 
5666 static struct ibm_struct light_driver_data = {
5667 	.name = "light",
5668 	.read = light_read,
5669 	.write = light_write,
5670 	.exit = light_exit,
5671 };
5672 
5673 /*************************************************************************
5674  * CMOS subdriver
5675  */
5676 
5677 /* sysfs cmos_command -------------------------------------------------- */
5678 static ssize_t cmos_command_store(struct device *dev,
5679 			    struct device_attribute *attr,
5680 			    const char *buf, size_t count)
5681 {
5682 	unsigned long cmos_cmd;
5683 	int res;
5684 
5685 	if (parse_strtoul(buf, 21, &cmos_cmd))
5686 		return -EINVAL;
5687 
5688 	res = issue_thinkpad_cmos_command(cmos_cmd);
5689 	return (res) ? res : count;
5690 }
5691 
5692 static DEVICE_ATTR_WO(cmos_command);
5693 
5694 /* --------------------------------------------------------------------- */
5695 
5696 static int __init cmos_init(struct ibm_init_struct *iibm)
5697 {
5698 	int res;
5699 
5700 	vdbg_printk(TPACPI_DBG_INIT,
5701 		"initializing cmos commands subdriver\n");
5702 
5703 	TPACPI_ACPIHANDLE_INIT(cmos);
5704 
5705 	vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
5706 		str_supported(cmos_handle != NULL));
5707 
5708 	res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5709 	if (res)
5710 		return res;
5711 
5712 	return (cmos_handle) ? 0 : 1;
5713 }
5714 
5715 static void cmos_exit(void)
5716 {
5717 	device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5718 }
5719 
5720 static int cmos_read(struct seq_file *m)
5721 {
5722 	/* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
5723 	   R30, R31, T20-22, X20-21 */
5724 	if (!cmos_handle)
5725 		seq_printf(m, "status:\t\tnot supported\n");
5726 	else {
5727 		seq_printf(m, "status:\t\tsupported\n");
5728 		seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
5729 	}
5730 
5731 	return 0;
5732 }
5733 
5734 static int cmos_write(char *buf)
5735 {
5736 	char *cmd;
5737 	int cmos_cmd, res;
5738 
5739 	while ((cmd = strsep(&buf, ","))) {
5740 		if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5741 		    cmos_cmd >= 0 && cmos_cmd <= 21) {
5742 			/* cmos_cmd set */
5743 		} else
5744 			return -EINVAL;
5745 
5746 		res = issue_thinkpad_cmos_command(cmos_cmd);
5747 		if (res)
5748 			return res;
5749 	}
5750 
5751 	return 0;
5752 }
5753 
5754 static struct ibm_struct cmos_driver_data = {
5755 	.name = "cmos",
5756 	.read = cmos_read,
5757 	.write = cmos_write,
5758 	.exit = cmos_exit,
5759 };
5760 
5761 /*************************************************************************
5762  * LED subdriver
5763  */
5764 
5765 enum led_access_mode {
5766 	TPACPI_LED_NONE = 0,
5767 	TPACPI_LED_570,	/* 570 */
5768 	TPACPI_LED_OLD,	/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5769 	TPACPI_LED_NEW,	/* all others */
5770 };
5771 
5772 enum {	/* For TPACPI_LED_OLD */
5773 	TPACPI_LED_EC_HLCL = 0x0c,	/* EC reg to get led to power on */
5774 	TPACPI_LED_EC_HLBL = 0x0d,	/* EC reg to blink a lit led */
5775 	TPACPI_LED_EC_HLMS = 0x0e,	/* EC reg to select led to command */
5776 };
5777 
5778 static enum led_access_mode led_supported;
5779 
5780 static acpi_handle led_handle;
5781 
5782 #define TPACPI_LED_NUMLEDS 16
5783 static struct tpacpi_led_classdev *tpacpi_leds;
5784 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5785 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5786 	/* there's a limit of 19 chars + NULL before 2.6.26 */
5787 	"tpacpi::power",
5788 	"tpacpi:orange:batt",
5789 	"tpacpi:green:batt",
5790 	"tpacpi::dock_active",
5791 	"tpacpi::bay_active",
5792 	"tpacpi::dock_batt",
5793 	"tpacpi::unknown_led",
5794 	"tpacpi::standby",
5795 	"tpacpi::dock_status1",
5796 	"tpacpi::dock_status2",
5797 	"tpacpi::unknown_led2",
5798 	"tpacpi::unknown_led3",
5799 	"tpacpi::thinkvantage",
5800 };
5801 #define TPACPI_SAFE_LEDS	0x1081U
5802 
5803 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5804 {
5805 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5806 	return false;
5807 #else
5808 	return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5809 #endif
5810 }
5811 
5812 static int led_get_status(const unsigned int led)
5813 {
5814 	int status;
5815 	enum led_status_t led_s;
5816 
5817 	switch (led_supported) {
5818 	case TPACPI_LED_570:
5819 		if (!acpi_evalf(ec_handle,
5820 				&status, "GLED", "dd", 1 << led))
5821 			return -EIO;
5822 		led_s = (status == 0) ?
5823 				TPACPI_LED_OFF :
5824 				((status == 1) ?
5825 					TPACPI_LED_ON :
5826 					TPACPI_LED_BLINK);
5827 		tpacpi_led_state_cache[led] = led_s;
5828 		return led_s;
5829 	default:
5830 		return -ENXIO;
5831 	}
5832 
5833 	/* not reached */
5834 }
5835 
5836 static int led_set_status(const unsigned int led,
5837 			  const enum led_status_t ledstatus)
5838 {
5839 	/* off, on, blink. Index is led_status_t */
5840 	static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5841 	static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5842 
5843 	int rc = 0;
5844 
5845 	switch (led_supported) {
5846 	case TPACPI_LED_570:
5847 		/* 570 */
5848 		if (unlikely(led > 7))
5849 			return -EINVAL;
5850 		if (unlikely(tpacpi_is_led_restricted(led)))
5851 			return -EPERM;
5852 		if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5853 				(1 << led), led_sled_arg1[ledstatus]))
5854 			return -EIO;
5855 		break;
5856 	case TPACPI_LED_OLD:
5857 		/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5858 		if (unlikely(led > 7))
5859 			return -EINVAL;
5860 		if (unlikely(tpacpi_is_led_restricted(led)))
5861 			return -EPERM;
5862 		rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5863 		if (rc >= 0)
5864 			rc = ec_write(TPACPI_LED_EC_HLBL,
5865 				      (ledstatus == TPACPI_LED_BLINK) << led);
5866 		if (rc >= 0)
5867 			rc = ec_write(TPACPI_LED_EC_HLCL,
5868 				      (ledstatus != TPACPI_LED_OFF) << led);
5869 		break;
5870 	case TPACPI_LED_NEW:
5871 		/* all others */
5872 		if (unlikely(led >= TPACPI_LED_NUMLEDS))
5873 			return -EINVAL;
5874 		if (unlikely(tpacpi_is_led_restricted(led)))
5875 			return -EPERM;
5876 		if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5877 				led, led_led_arg1[ledstatus]))
5878 			return -EIO;
5879 		break;
5880 	default:
5881 		return -ENXIO;
5882 	}
5883 
5884 	if (!rc)
5885 		tpacpi_led_state_cache[led] = ledstatus;
5886 
5887 	return rc;
5888 }
5889 
5890 static int led_sysfs_set(struct led_classdev *led_cdev,
5891 			enum led_brightness brightness)
5892 {
5893 	struct tpacpi_led_classdev *data = container_of(led_cdev,
5894 			     struct tpacpi_led_classdev, led_classdev);
5895 	enum led_status_t new_state;
5896 
5897 	if (brightness == LED_OFF)
5898 		new_state = TPACPI_LED_OFF;
5899 	else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5900 		new_state = TPACPI_LED_ON;
5901 	else
5902 		new_state = TPACPI_LED_BLINK;
5903 
5904 	return led_set_status(data->led, new_state);
5905 }
5906 
5907 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5908 			unsigned long *delay_on, unsigned long *delay_off)
5909 {
5910 	struct tpacpi_led_classdev *data = container_of(led_cdev,
5911 			     struct tpacpi_led_classdev, led_classdev);
5912 
5913 	/* Can we choose the flash rate? */
5914 	if (*delay_on == 0 && *delay_off == 0) {
5915 		/* yes. set them to the hardware blink rate (1 Hz) */
5916 		*delay_on = 500; /* ms */
5917 		*delay_off = 500; /* ms */
5918 	} else if ((*delay_on != 500) || (*delay_off != 500))
5919 		return -EINVAL;
5920 
5921 	return led_set_status(data->led, TPACPI_LED_BLINK);
5922 }
5923 
5924 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5925 {
5926 	int rc;
5927 
5928 	struct tpacpi_led_classdev *data = container_of(led_cdev,
5929 			     struct tpacpi_led_classdev, led_classdev);
5930 
5931 	rc = led_get_status(data->led);
5932 
5933 	if (rc == TPACPI_LED_OFF || rc < 0)
5934 		rc = LED_OFF;	/* no error handling in led class :( */
5935 	else
5936 		rc = LED_FULL;
5937 
5938 	return rc;
5939 }
5940 
5941 static void led_exit(void)
5942 {
5943 	unsigned int i;
5944 
5945 	for (i = 0; i < TPACPI_LED_NUMLEDS; i++)
5946 		led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5947 
5948 	kfree(tpacpi_leds);
5949 }
5950 
5951 static int __init tpacpi_init_led(unsigned int led)
5952 {
5953 	/* LEDs with no name don't get registered */
5954 	if (!tpacpi_led_names[led])
5955 		return 0;
5956 
5957 	tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set;
5958 	tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5959 	if (led_supported == TPACPI_LED_570)
5960 		tpacpi_leds[led].led_classdev.brightness_get = &led_sysfs_get;
5961 
5962 	tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5963 	tpacpi_leds[led].led = led;
5964 
5965 	return led_classdev_register(&tpacpi_pdev->dev, &tpacpi_leds[led].led_classdev);
5966 }
5967 
5968 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5969 	TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5970 	TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5971 	TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5972 
5973 	TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5974 	TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5975 	TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5976 	TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5977 	TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5978 	TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5979 	TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5980 	TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5981 
5982 	TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5983 	TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5984 	TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5985 	TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5986 	TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5987 
5988 	TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5989 	TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5990 	TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5991 	TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5992 
5993 	/* (1) - may have excess leds enabled on MSB */
5994 
5995 	/* Defaults (order matters, keep last, don't reorder!) */
5996 	{ /* Lenovo */
5997 	  .vendor = PCI_VENDOR_ID_LENOVO,
5998 	  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5999 	  .quirks = 0x1fffU,
6000 	},
6001 	{ /* IBM ThinkPads with no EC version string */
6002 	  .vendor = PCI_VENDOR_ID_IBM,
6003 	  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
6004 	  .quirks = 0x00ffU,
6005 	},
6006 	{ /* IBM ThinkPads with EC version string */
6007 	  .vendor = PCI_VENDOR_ID_IBM,
6008 	  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
6009 	  .quirks = 0x00bfU,
6010 	},
6011 };
6012 
6013 static enum led_access_mode __init led_init_detect_mode(void)
6014 {
6015 	acpi_status status;
6016 
6017 	if (tpacpi_is_ibm()) {
6018 		/* 570 */
6019 		status = acpi_get_handle(ec_handle, "SLED", &led_handle);
6020 		if (ACPI_SUCCESS(status))
6021 			return TPACPI_LED_570;
6022 
6023 		/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
6024 		status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
6025 		if (ACPI_SUCCESS(status))
6026 			return TPACPI_LED_OLD;
6027 	}
6028 
6029 	/* most others */
6030 	status = acpi_get_handle(ec_handle, "LED", &led_handle);
6031 	if (ACPI_SUCCESS(status))
6032 		return TPACPI_LED_NEW;
6033 
6034 	/* R30, R31, and unknown firmwares */
6035 	led_handle = NULL;
6036 	return TPACPI_LED_NONE;
6037 }
6038 
6039 static int __init led_init(struct ibm_init_struct *iibm)
6040 {
6041 	unsigned int i;
6042 	int rc;
6043 	unsigned long useful_leds;
6044 
6045 	vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
6046 
6047 	led_supported = led_init_detect_mode();
6048 
6049 	if (led_supported != TPACPI_LED_NONE) {
6050 		useful_leds = tpacpi_check_quirks(led_useful_qtable,
6051 				ARRAY_SIZE(led_useful_qtable));
6052 
6053 		if (!useful_leds) {
6054 			led_handle = NULL;
6055 			led_supported = TPACPI_LED_NONE;
6056 		}
6057 	}
6058 
6059 	vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
6060 		str_supported(led_supported), led_supported);
6061 
6062 	if (led_supported == TPACPI_LED_NONE)
6063 		return 1;
6064 
6065 	tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds),
6066 			      GFP_KERNEL);
6067 	if (!tpacpi_leds) {
6068 		pr_err("Out of memory for LED data\n");
6069 		return -ENOMEM;
6070 	}
6071 
6072 	for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
6073 		tpacpi_leds[i].led = -1;
6074 
6075 		if (!tpacpi_is_led_restricted(i) && test_bit(i, &useful_leds)) {
6076 			rc = tpacpi_init_led(i);
6077 			if (rc < 0) {
6078 				led_exit();
6079 				return rc;
6080 			}
6081 		}
6082 	}
6083 
6084 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
6085 	pr_notice("warning: userspace override of important firmware LEDs is enabled\n");
6086 #endif
6087 	return 0;
6088 }
6089 
6090 #define str_led_status(s) \
6091 	((s) == TPACPI_LED_OFF ? "off" : \
6092 		((s) == TPACPI_LED_ON ? "on" : "blinking"))
6093 
6094 static int led_read(struct seq_file *m)
6095 {
6096 	if (!led_supported) {
6097 		seq_printf(m, "status:\t\tnot supported\n");
6098 		return 0;
6099 	}
6100 	seq_printf(m, "status:\t\tsupported\n");
6101 
6102 	if (led_supported == TPACPI_LED_570) {
6103 		/* 570 */
6104 		int i, status;
6105 		for (i = 0; i < 8; i++) {
6106 			status = led_get_status(i);
6107 			if (status < 0)
6108 				return -EIO;
6109 			seq_printf(m, "%d:\t\t%s\n",
6110 				       i, str_led_status(status));
6111 		}
6112 	}
6113 
6114 	seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n");
6115 
6116 	return 0;
6117 }
6118 
6119 static int led_write(char *buf)
6120 {
6121 	char *cmd;
6122 	int led, rc;
6123 	enum led_status_t s;
6124 
6125 	if (!led_supported)
6126 		return -ENODEV;
6127 
6128 	while ((cmd = strsep(&buf, ","))) {
6129 		if (sscanf(cmd, "%d", &led) != 1)
6130 			return -EINVAL;
6131 
6132 		if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1))
6133 			return -ENODEV;
6134 
6135 		if (tpacpi_leds[led].led < 0)
6136 			return -ENODEV;
6137 
6138 		if (strstr(cmd, "off")) {
6139 			s = TPACPI_LED_OFF;
6140 		} else if (strstr(cmd, "on")) {
6141 			s = TPACPI_LED_ON;
6142 		} else if (strstr(cmd, "blink")) {
6143 			s = TPACPI_LED_BLINK;
6144 		} else {
6145 			return -EINVAL;
6146 		}
6147 
6148 		rc = led_set_status(led, s);
6149 		if (rc < 0)
6150 			return rc;
6151 	}
6152 
6153 	return 0;
6154 }
6155 
6156 static struct ibm_struct led_driver_data = {
6157 	.name = "led",
6158 	.read = led_read,
6159 	.write = led_write,
6160 	.exit = led_exit,
6161 };
6162 
6163 /*************************************************************************
6164  * Beep subdriver
6165  */
6166 
6167 TPACPI_HANDLE(beep, ec, "BEEP");	/* all except R30, R31 */
6168 
6169 #define TPACPI_BEEP_Q1 0x0001
6170 
6171 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
6172 	TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
6173 	TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
6174 };
6175 
6176 static int __init beep_init(struct ibm_init_struct *iibm)
6177 {
6178 	unsigned long quirks;
6179 
6180 	vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
6181 
6182 	TPACPI_ACPIHANDLE_INIT(beep);
6183 
6184 	vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
6185 		str_supported(beep_handle != NULL));
6186 
6187 	quirks = tpacpi_check_quirks(beep_quirk_table,
6188 				     ARRAY_SIZE(beep_quirk_table));
6189 
6190 	tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
6191 
6192 	return (beep_handle) ? 0 : 1;
6193 }
6194 
6195 static int beep_read(struct seq_file *m)
6196 {
6197 	if (!beep_handle)
6198 		seq_printf(m, "status:\t\tnot supported\n");
6199 	else {
6200 		seq_printf(m, "status:\t\tsupported\n");
6201 		seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
6202 	}
6203 
6204 	return 0;
6205 }
6206 
6207 static int beep_write(char *buf)
6208 {
6209 	char *cmd;
6210 	int beep_cmd;
6211 
6212 	if (!beep_handle)
6213 		return -ENODEV;
6214 
6215 	while ((cmd = strsep(&buf, ","))) {
6216 		if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
6217 		    beep_cmd >= 0 && beep_cmd <= 17) {
6218 			/* beep_cmd set */
6219 		} else
6220 			return -EINVAL;
6221 		if (tp_features.beep_needs_two_args) {
6222 			if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
6223 					beep_cmd, 0))
6224 				return -EIO;
6225 		} else {
6226 			if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
6227 					beep_cmd))
6228 				return -EIO;
6229 		}
6230 	}
6231 
6232 	return 0;
6233 }
6234 
6235 static struct ibm_struct beep_driver_data = {
6236 	.name = "beep",
6237 	.read = beep_read,
6238 	.write = beep_write,
6239 };
6240 
6241 /*************************************************************************
6242  * Thermal subdriver
6243  */
6244 
6245 enum thermal_access_mode {
6246 	TPACPI_THERMAL_NONE = 0,	/* No thermal support */
6247 	TPACPI_THERMAL_ACPI_TMP07,	/* Use ACPI TMP0-7 */
6248 	TPACPI_THERMAL_ACPI_UPDT,	/* Use ACPI TMP0-7 with UPDT */
6249 	TPACPI_THERMAL_TPEC_8,		/* Use ACPI EC regs, 8 sensors */
6250 	TPACPI_THERMAL_TPEC_16,		/* Use ACPI EC regs, 16 sensors */
6251 };
6252 
6253 enum { /* TPACPI_THERMAL_TPEC_* */
6254 	TP_EC_THERMAL_TMP0 = 0x78,	/* ACPI EC regs TMP 0..7 */
6255 	TP_EC_THERMAL_TMP8 = 0xC0,	/* ACPI EC regs TMP 8..15 */
6256 	TP_EC_THERMAL_TMP_NA = -128,	/* ACPI EC sensor not available */
6257 
6258 	TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
6259 };
6260 
6261 
6262 #define TPACPI_MAX_THERMAL_SENSORS 16	/* Max thermal sensors supported */
6263 struct ibm_thermal_sensors_struct {
6264 	s32 temp[TPACPI_MAX_THERMAL_SENSORS];
6265 };
6266 
6267 static enum thermal_access_mode thermal_read_mode;
6268 
6269 /* idx is zero-based */
6270 static int thermal_get_sensor(int idx, s32 *value)
6271 {
6272 	int t;
6273 	s8 tmp;
6274 	char tmpi[5];
6275 
6276 	t = TP_EC_THERMAL_TMP0;
6277 
6278 	switch (thermal_read_mode) {
6279 #if TPACPI_MAX_THERMAL_SENSORS >= 16
6280 	case TPACPI_THERMAL_TPEC_16:
6281 		if (idx >= 8 && idx <= 15) {
6282 			t = TP_EC_THERMAL_TMP8;
6283 			idx -= 8;
6284 		}
6285 #endif
6286 		fallthrough;
6287 	case TPACPI_THERMAL_TPEC_8:
6288 		if (idx <= 7) {
6289 			if (!acpi_ec_read(t + idx, &tmp))
6290 				return -EIO;
6291 			*value = tmp * 1000;
6292 			return 0;
6293 		}
6294 		break;
6295 
6296 	case TPACPI_THERMAL_ACPI_UPDT:
6297 		if (idx <= 7) {
6298 			snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6299 			if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
6300 				return -EIO;
6301 			if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6302 				return -EIO;
6303 			*value = (t - 2732) * 100;
6304 			return 0;
6305 		}
6306 		break;
6307 
6308 	case TPACPI_THERMAL_ACPI_TMP07:
6309 		if (idx <= 7) {
6310 			snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6311 			if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6312 				return -EIO;
6313 			if (t > 127 || t < -127)
6314 				t = TP_EC_THERMAL_TMP_NA;
6315 			*value = t * 1000;
6316 			return 0;
6317 		}
6318 		break;
6319 
6320 	case TPACPI_THERMAL_NONE:
6321 	default:
6322 		return -ENOSYS;
6323 	}
6324 
6325 	return -EINVAL;
6326 }
6327 
6328 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
6329 {
6330 	int res, i;
6331 	int n;
6332 
6333 	n = 8;
6334 	i = 0;
6335 
6336 	if (!s)
6337 		return -EINVAL;
6338 
6339 	if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
6340 		n = 16;
6341 
6342 	for (i = 0 ; i < n; i++) {
6343 		res = thermal_get_sensor(i, &s->temp[i]);
6344 		if (res)
6345 			return res;
6346 	}
6347 
6348 	return n;
6349 }
6350 
6351 static void thermal_dump_all_sensors(void)
6352 {
6353 	int n, i;
6354 	struct ibm_thermal_sensors_struct t;
6355 
6356 	n = thermal_get_sensors(&t);
6357 	if (n <= 0)
6358 		return;
6359 
6360 	pr_notice("temperatures (Celsius):");
6361 
6362 	for (i = 0; i < n; i++) {
6363 		if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
6364 			pr_cont(" %d", (int)(t.temp[i] / 1000));
6365 		else
6366 			pr_cont(" N/A");
6367 	}
6368 
6369 	pr_cont("\n");
6370 }
6371 
6372 /* sysfs temp##_input -------------------------------------------------- */
6373 
6374 static ssize_t thermal_temp_input_show(struct device *dev,
6375 			   struct device_attribute *attr,
6376 			   char *buf)
6377 {
6378 	struct sensor_device_attribute *sensor_attr =
6379 					to_sensor_dev_attr(attr);
6380 	int idx = sensor_attr->index;
6381 	s32 value;
6382 	int res;
6383 
6384 	res = thermal_get_sensor(idx, &value);
6385 	if (res)
6386 		return res;
6387 	if (value == TPACPI_THERMAL_SENSOR_NA)
6388 		return -ENXIO;
6389 
6390 	return snprintf(buf, PAGE_SIZE, "%d\n", value);
6391 }
6392 
6393 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
6394 	 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
6395 		     thermal_temp_input_show, NULL, _idxB)
6396 
6397 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
6398 	THERMAL_SENSOR_ATTR_TEMP(1, 0),
6399 	THERMAL_SENSOR_ATTR_TEMP(2, 1),
6400 	THERMAL_SENSOR_ATTR_TEMP(3, 2),
6401 	THERMAL_SENSOR_ATTR_TEMP(4, 3),
6402 	THERMAL_SENSOR_ATTR_TEMP(5, 4),
6403 	THERMAL_SENSOR_ATTR_TEMP(6, 5),
6404 	THERMAL_SENSOR_ATTR_TEMP(7, 6),
6405 	THERMAL_SENSOR_ATTR_TEMP(8, 7),
6406 	THERMAL_SENSOR_ATTR_TEMP(9, 8),
6407 	THERMAL_SENSOR_ATTR_TEMP(10, 9),
6408 	THERMAL_SENSOR_ATTR_TEMP(11, 10),
6409 	THERMAL_SENSOR_ATTR_TEMP(12, 11),
6410 	THERMAL_SENSOR_ATTR_TEMP(13, 12),
6411 	THERMAL_SENSOR_ATTR_TEMP(14, 13),
6412 	THERMAL_SENSOR_ATTR_TEMP(15, 14),
6413 	THERMAL_SENSOR_ATTR_TEMP(16, 15),
6414 };
6415 
6416 #define THERMAL_ATTRS(X) \
6417 	&sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
6418 
6419 static struct attribute *thermal_temp_input_attr[] = {
6420 	THERMAL_ATTRS(8),
6421 	THERMAL_ATTRS(9),
6422 	THERMAL_ATTRS(10),
6423 	THERMAL_ATTRS(11),
6424 	THERMAL_ATTRS(12),
6425 	THERMAL_ATTRS(13),
6426 	THERMAL_ATTRS(14),
6427 	THERMAL_ATTRS(15),
6428 	THERMAL_ATTRS(0),
6429 	THERMAL_ATTRS(1),
6430 	THERMAL_ATTRS(2),
6431 	THERMAL_ATTRS(3),
6432 	THERMAL_ATTRS(4),
6433 	THERMAL_ATTRS(5),
6434 	THERMAL_ATTRS(6),
6435 	THERMAL_ATTRS(7),
6436 	NULL
6437 };
6438 
6439 static const struct attribute_group thermal_temp_input16_group = {
6440 	.attrs = thermal_temp_input_attr
6441 };
6442 
6443 static const struct attribute_group thermal_temp_input8_group = {
6444 	.attrs = &thermal_temp_input_attr[8]
6445 };
6446 
6447 #undef THERMAL_SENSOR_ATTR_TEMP
6448 #undef THERMAL_ATTRS
6449 
6450 /* --------------------------------------------------------------------- */
6451 
6452 static int __init thermal_init(struct ibm_init_struct *iibm)
6453 {
6454 	u8 t, ta1, ta2;
6455 	int i;
6456 	int acpi_tmp7;
6457 	int res;
6458 
6459 	vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
6460 
6461 	acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
6462 
6463 	if (thinkpad_id.ec_model) {
6464 		/*
6465 		 * Direct EC access mode: sensors at registers
6466 		 * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
6467 		 * non-implemented, thermal sensors return 0x80 when
6468 		 * not available
6469 		 */
6470 
6471 		ta1 = ta2 = 0;
6472 		for (i = 0; i < 8; i++) {
6473 			if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
6474 				ta1 |= t;
6475 			} else {
6476 				ta1 = 0;
6477 				break;
6478 			}
6479 			if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
6480 				ta2 |= t;
6481 			} else {
6482 				ta1 = 0;
6483 				break;
6484 			}
6485 		}
6486 		if (ta1 == 0) {
6487 			/* This is sheer paranoia, but we handle it anyway */
6488 			if (acpi_tmp7) {
6489 				pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n");
6490 				thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6491 			} else {
6492 				pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n");
6493 				thermal_read_mode = TPACPI_THERMAL_NONE;
6494 			}
6495 		} else {
6496 			thermal_read_mode =
6497 			    (ta2 != 0) ?
6498 			    TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
6499 		}
6500 	} else if (acpi_tmp7) {
6501 		if (tpacpi_is_ibm() &&
6502 		    acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
6503 			/* 600e/x, 770e, 770x */
6504 			thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
6505 		} else {
6506 			/* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
6507 			thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6508 		}
6509 	} else {
6510 		/* temperatures not supported on 570, G4x, R30, R31, R32 */
6511 		thermal_read_mode = TPACPI_THERMAL_NONE;
6512 	}
6513 
6514 	vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
6515 		str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
6516 		thermal_read_mode);
6517 
6518 	switch (thermal_read_mode) {
6519 	case TPACPI_THERMAL_TPEC_16:
6520 		res = sysfs_create_group(&tpacpi_hwmon->kobj,
6521 				&thermal_temp_input16_group);
6522 		if (res)
6523 			return res;
6524 		break;
6525 	case TPACPI_THERMAL_TPEC_8:
6526 	case TPACPI_THERMAL_ACPI_TMP07:
6527 	case TPACPI_THERMAL_ACPI_UPDT:
6528 		res = sysfs_create_group(&tpacpi_hwmon->kobj,
6529 				&thermal_temp_input8_group);
6530 		if (res)
6531 			return res;
6532 		break;
6533 	case TPACPI_THERMAL_NONE:
6534 	default:
6535 		return 1;
6536 	}
6537 
6538 	return 0;
6539 }
6540 
6541 static void thermal_exit(void)
6542 {
6543 	switch (thermal_read_mode) {
6544 	case TPACPI_THERMAL_TPEC_16:
6545 		sysfs_remove_group(&tpacpi_hwmon->kobj,
6546 				   &thermal_temp_input16_group);
6547 		break;
6548 	case TPACPI_THERMAL_TPEC_8:
6549 	case TPACPI_THERMAL_ACPI_TMP07:
6550 	case TPACPI_THERMAL_ACPI_UPDT:
6551 		sysfs_remove_group(&tpacpi_hwmon->kobj,
6552 				   &thermal_temp_input8_group);
6553 		break;
6554 	case TPACPI_THERMAL_NONE:
6555 	default:
6556 		break;
6557 	}
6558 }
6559 
6560 static int thermal_read(struct seq_file *m)
6561 {
6562 	int n, i;
6563 	struct ibm_thermal_sensors_struct t;
6564 
6565 	n = thermal_get_sensors(&t);
6566 	if (unlikely(n < 0))
6567 		return n;
6568 
6569 	seq_printf(m, "temperatures:\t");
6570 
6571 	if (n > 0) {
6572 		for (i = 0; i < (n - 1); i++)
6573 			seq_printf(m, "%d ", t.temp[i] / 1000);
6574 		seq_printf(m, "%d\n", t.temp[i] / 1000);
6575 	} else
6576 		seq_printf(m, "not supported\n");
6577 
6578 	return 0;
6579 }
6580 
6581 static struct ibm_struct thermal_driver_data = {
6582 	.name = "thermal",
6583 	.read = thermal_read,
6584 	.exit = thermal_exit,
6585 };
6586 
6587 /*************************************************************************
6588  * Backlight/brightness subdriver
6589  */
6590 
6591 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
6592 
6593 /*
6594  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
6595  * CMOS NVRAM byte 0x5E, bits 0-3.
6596  *
6597  * EC HBRV (0x31) has the following layout
6598  *   Bit 7: unknown function
6599  *   Bit 6: unknown function
6600  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
6601  *   Bit 4: must be set to zero to avoid problems
6602  *   Bit 3-0: backlight brightness level
6603  *
6604  * brightness_get_raw returns status data in the HBRV layout
6605  *
6606  * WARNING: The X61 has been verified to use HBRV for something else, so
6607  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
6608  * testing on the very early *60 Lenovo models...
6609  */
6610 
6611 enum {
6612 	TP_EC_BACKLIGHT = 0x31,
6613 
6614 	/* TP_EC_BACKLIGHT bitmasks */
6615 	TP_EC_BACKLIGHT_LVLMSK = 0x1F,
6616 	TP_EC_BACKLIGHT_CMDMSK = 0xE0,
6617 	TP_EC_BACKLIGHT_MAPSW = 0x20,
6618 };
6619 
6620 enum tpacpi_brightness_access_mode {
6621 	TPACPI_BRGHT_MODE_AUTO = 0,	/* Not implemented yet */
6622 	TPACPI_BRGHT_MODE_EC,		/* EC control */
6623 	TPACPI_BRGHT_MODE_UCMS_STEP,	/* UCMS step-based control */
6624 	TPACPI_BRGHT_MODE_ECNVRAM,	/* EC control w/ NVRAM store */
6625 	TPACPI_BRGHT_MODE_MAX
6626 };
6627 
6628 static struct backlight_device *ibm_backlight_device;
6629 
6630 static enum tpacpi_brightness_access_mode brightness_mode =
6631 		TPACPI_BRGHT_MODE_MAX;
6632 
6633 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6634 
6635 static struct mutex brightness_mutex;
6636 
6637 /* NVRAM brightness access,
6638  * call with brightness_mutex held! */
6639 static unsigned int tpacpi_brightness_nvram_get(void)
6640 {
6641 	u8 lnvram;
6642 
6643 	lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
6644 		  & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6645 		  >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
6646 	lnvram &= bright_maxlvl;
6647 
6648 	return lnvram;
6649 }
6650 
6651 static void tpacpi_brightness_checkpoint_nvram(void)
6652 {
6653 	u8 lec = 0;
6654 	u8 b_nvram;
6655 
6656 	if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
6657 		return;
6658 
6659 	vdbg_printk(TPACPI_DBG_BRGHT,
6660 		"trying to checkpoint backlight level to NVRAM...\n");
6661 
6662 	if (mutex_lock_killable(&brightness_mutex) < 0)
6663 		return;
6664 
6665 	if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6666 		goto unlock;
6667 	lec &= TP_EC_BACKLIGHT_LVLMSK;
6668 	b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
6669 
6670 	if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6671 			     >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
6672 		/* NVRAM needs update */
6673 		b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
6674 				TP_NVRAM_POS_LEVEL_BRIGHTNESS);
6675 		b_nvram |= lec;
6676 		nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
6677 		dbg_printk(TPACPI_DBG_BRGHT,
6678 			   "updated NVRAM backlight level to %u (0x%02x)\n",
6679 			   (unsigned int) lec, (unsigned int) b_nvram);
6680 	} else
6681 		vdbg_printk(TPACPI_DBG_BRGHT,
6682 			   "NVRAM backlight level already is %u (0x%02x)\n",
6683 			   (unsigned int) lec, (unsigned int) b_nvram);
6684 
6685 unlock:
6686 	mutex_unlock(&brightness_mutex);
6687 }
6688 
6689 
6690 /* call with brightness_mutex held! */
6691 static int tpacpi_brightness_get_raw(int *status)
6692 {
6693 	u8 lec = 0;
6694 
6695 	switch (brightness_mode) {
6696 	case TPACPI_BRGHT_MODE_UCMS_STEP:
6697 		*status = tpacpi_brightness_nvram_get();
6698 		return 0;
6699 	case TPACPI_BRGHT_MODE_EC:
6700 	case TPACPI_BRGHT_MODE_ECNVRAM:
6701 		if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6702 			return -EIO;
6703 		*status = lec;
6704 		return 0;
6705 	default:
6706 		return -ENXIO;
6707 	}
6708 }
6709 
6710 /* call with brightness_mutex held! */
6711 /* do NOT call with illegal backlight level value */
6712 static int tpacpi_brightness_set_ec(unsigned int value)
6713 {
6714 	u8 lec = 0;
6715 
6716 	if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6717 		return -EIO;
6718 
6719 	if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6720 				(lec & TP_EC_BACKLIGHT_CMDMSK) |
6721 				(value & TP_EC_BACKLIGHT_LVLMSK))))
6722 		return -EIO;
6723 
6724 	return 0;
6725 }
6726 
6727 /* call with brightness_mutex held! */
6728 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6729 {
6730 	int cmos_cmd, inc;
6731 	unsigned int current_value, i;
6732 
6733 	current_value = tpacpi_brightness_nvram_get();
6734 
6735 	if (value == current_value)
6736 		return 0;
6737 
6738 	cmos_cmd = (value > current_value) ?
6739 			TP_CMOS_BRIGHTNESS_UP :
6740 			TP_CMOS_BRIGHTNESS_DOWN;
6741 	inc = (value > current_value) ? 1 : -1;
6742 
6743 	for (i = current_value; i != value; i += inc)
6744 		if (issue_thinkpad_cmos_command(cmos_cmd))
6745 			return -EIO;
6746 
6747 	return 0;
6748 }
6749 
6750 /* May return EINTR which can always be mapped to ERESTARTSYS */
6751 static int brightness_set(unsigned int value)
6752 {
6753 	int res;
6754 
6755 	if (value > bright_maxlvl)
6756 		return -EINVAL;
6757 
6758 	vdbg_printk(TPACPI_DBG_BRGHT,
6759 			"set backlight level to %d\n", value);
6760 
6761 	res = mutex_lock_killable(&brightness_mutex);
6762 	if (res < 0)
6763 		return res;
6764 
6765 	switch (brightness_mode) {
6766 	case TPACPI_BRGHT_MODE_EC:
6767 	case TPACPI_BRGHT_MODE_ECNVRAM:
6768 		res = tpacpi_brightness_set_ec(value);
6769 		break;
6770 	case TPACPI_BRGHT_MODE_UCMS_STEP:
6771 		res = tpacpi_brightness_set_ucmsstep(value);
6772 		break;
6773 	default:
6774 		res = -ENXIO;
6775 	}
6776 
6777 	mutex_unlock(&brightness_mutex);
6778 	return res;
6779 }
6780 
6781 /* sysfs backlight class ----------------------------------------------- */
6782 
6783 static int brightness_update_status(struct backlight_device *bd)
6784 {
6785 	unsigned int level =
6786 		(bd->props.fb_blank == FB_BLANK_UNBLANK &&
6787 		 bd->props.power == FB_BLANK_UNBLANK) ?
6788 				bd->props.brightness : 0;
6789 
6790 	dbg_printk(TPACPI_DBG_BRGHT,
6791 			"backlight: attempt to set level to %d\n",
6792 			level);
6793 
6794 	/* it is the backlight class's job (caller) to handle
6795 	 * EINTR and other errors properly */
6796 	return brightness_set(level);
6797 }
6798 
6799 static int brightness_get(struct backlight_device *bd)
6800 {
6801 	int status, res;
6802 
6803 	res = mutex_lock_killable(&brightness_mutex);
6804 	if (res < 0)
6805 		return 0;
6806 
6807 	res = tpacpi_brightness_get_raw(&status);
6808 
6809 	mutex_unlock(&brightness_mutex);
6810 
6811 	if (res < 0)
6812 		return 0;
6813 
6814 	return status & TP_EC_BACKLIGHT_LVLMSK;
6815 }
6816 
6817 static void tpacpi_brightness_notify_change(void)
6818 {
6819 	backlight_force_update(ibm_backlight_device,
6820 			       BACKLIGHT_UPDATE_HOTKEY);
6821 }
6822 
6823 static const struct backlight_ops ibm_backlight_data = {
6824 	.get_brightness = brightness_get,
6825 	.update_status  = brightness_update_status,
6826 };
6827 
6828 /* --------------------------------------------------------------------- */
6829 
6830 /*
6831  * Call _BCL method of video device.  On some ThinkPads this will
6832  * switch the firmware to the ACPI brightness control mode.
6833  */
6834 
6835 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6836 {
6837 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6838 	union acpi_object *obj;
6839 	struct acpi_device *device, *child;
6840 	int rc;
6841 
6842 	if (acpi_bus_get_device(handle, &device))
6843 		return 0;
6844 
6845 	rc = 0;
6846 	list_for_each_entry(child, &device->children, node) {
6847 		acpi_status status = acpi_evaluate_object(child->handle, "_BCL",
6848 							  NULL, &buffer);
6849 		if (ACPI_FAILURE(status)) {
6850 			buffer.length = ACPI_ALLOCATE_BUFFER;
6851 			continue;
6852 		}
6853 
6854 		obj = (union acpi_object *)buffer.pointer;
6855 		if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6856 			pr_err("Unknown _BCL data, please report this to %s\n",
6857 				TPACPI_MAIL);
6858 			rc = 0;
6859 		} else {
6860 			rc = obj->package.count;
6861 		}
6862 		break;
6863 	}
6864 
6865 	kfree(buffer.pointer);
6866 	return rc;
6867 }
6868 
6869 
6870 /*
6871  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6872  */
6873 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6874 {
6875 	acpi_handle video_device;
6876 	int bcl_levels = 0;
6877 
6878 	tpacpi_acpi_handle_locate("video", NULL, &video_device);
6879 	if (video_device)
6880 		bcl_levels = tpacpi_query_bcl_levels(video_device);
6881 
6882 	tp_features.bright_acpimode = (bcl_levels > 0);
6883 
6884 	return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6885 }
6886 
6887 /*
6888  * These are only useful for models that have only one possibility
6889  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6890  * these quirks.
6891  */
6892 #define TPACPI_BRGHT_Q_NOEC	0x0001	/* Must NOT use EC HBRV */
6893 #define TPACPI_BRGHT_Q_EC	0x0002  /* Should or must use EC HBRV */
6894 #define TPACPI_BRGHT_Q_ASK	0x8000	/* Ask for user report */
6895 
6896 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6897 	/* Models with ATI GPUs known to require ECNVRAM mode */
6898 	TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),	/* T43/p ATI */
6899 
6900 	/* Models with ATI GPUs that can use ECNVRAM */
6901 	TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),	/* R50,51 T40-42 */
6902 	TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6903 	TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC),	/* R52 */
6904 	TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6905 
6906 	/* Models with Intel Extreme Graphics 2 */
6907 	TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),	/* X40 */
6908 	TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6909 	TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6910 
6911 	/* Models with Intel GMA900 */
6912 	TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),	/* T43, R52 */
6913 	TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),	/* X41 */
6914 	TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),	/* X41 Tablet */
6915 };
6916 
6917 /*
6918  * Returns < 0 for error, otherwise sets tp_features.bright_*
6919  * and bright_maxlvl.
6920  */
6921 static void __init tpacpi_detect_brightness_capabilities(void)
6922 {
6923 	unsigned int b;
6924 
6925 	vdbg_printk(TPACPI_DBG_INIT,
6926 		    "detecting firmware brightness interface capabilities\n");
6927 
6928 	/* we could run a quirks check here (same table used by
6929 	 * brightness_init) if needed */
6930 
6931 	/*
6932 	 * We always attempt to detect acpi support, so as to switch
6933 	 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6934 	 * going to publish a backlight interface
6935 	 */
6936 	b = tpacpi_check_std_acpi_brightness_support();
6937 	switch (b) {
6938 	case 16:
6939 		bright_maxlvl = 15;
6940 		break;
6941 	case 8:
6942 	case 0:
6943 		bright_maxlvl = 7;
6944 		break;
6945 	default:
6946 		tp_features.bright_unkfw = 1;
6947 		bright_maxlvl = b - 1;
6948 	}
6949 	pr_debug("detected %u brightness levels\n", bright_maxlvl + 1);
6950 }
6951 
6952 static int __init brightness_init(struct ibm_init_struct *iibm)
6953 {
6954 	struct backlight_properties props;
6955 	int b;
6956 	unsigned long quirks;
6957 
6958 	vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6959 
6960 	mutex_init(&brightness_mutex);
6961 
6962 	quirks = tpacpi_check_quirks(brightness_quirk_table,
6963 				ARRAY_SIZE(brightness_quirk_table));
6964 
6965 	/* tpacpi_detect_brightness_capabilities() must have run already */
6966 
6967 	/* if it is unknown, we don't handle it: it wouldn't be safe */
6968 	if (tp_features.bright_unkfw)
6969 		return 1;
6970 
6971 	if (!brightness_enable) {
6972 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6973 			   "brightness support disabled by module parameter\n");
6974 		return 1;
6975 	}
6976 
6977 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
6978 		if (brightness_enable > 1) {
6979 			pr_info("Standard ACPI backlight interface available, not loading native one\n");
6980 			return 1;
6981 		} else if (brightness_enable == 1) {
6982 			pr_warn("Cannot enable backlight brightness support, ACPI is already handling it.  Refer to the acpi_backlight kernel parameter.\n");
6983 			return 1;
6984 		}
6985 	} else if (!tp_features.bright_acpimode) {
6986 		pr_notice("ACPI backlight interface not available\n");
6987 		return 1;
6988 	}
6989 
6990 	pr_notice("ACPI native brightness control enabled\n");
6991 
6992 	/*
6993 	 * Check for module parameter bogosity, note that we
6994 	 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6995 	 * able to detect "unspecified"
6996 	 */
6997 	if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6998 		return -EINVAL;
6999 
7000 	/* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
7001 	if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
7002 	    brightness_mode == TPACPI_BRGHT_MODE_MAX) {
7003 		if (quirks & TPACPI_BRGHT_Q_EC)
7004 			brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
7005 		else
7006 			brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
7007 
7008 		dbg_printk(TPACPI_DBG_BRGHT,
7009 			   "driver auto-selected brightness_mode=%d\n",
7010 			   brightness_mode);
7011 	}
7012 
7013 	/* Safety */
7014 	if (!tpacpi_is_ibm() &&
7015 	    (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
7016 	     brightness_mode == TPACPI_BRGHT_MODE_EC))
7017 		return -EINVAL;
7018 
7019 	if (tpacpi_brightness_get_raw(&b) < 0)
7020 		return 1;
7021 
7022 	memset(&props, 0, sizeof(struct backlight_properties));
7023 	props.type = BACKLIGHT_PLATFORM;
7024 	props.max_brightness = bright_maxlvl;
7025 	props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
7026 	ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
7027 							 NULL, NULL,
7028 							 &ibm_backlight_data,
7029 							 &props);
7030 	if (IS_ERR(ibm_backlight_device)) {
7031 		int rc = PTR_ERR(ibm_backlight_device);
7032 		ibm_backlight_device = NULL;
7033 		pr_err("Could not register backlight device\n");
7034 		return rc;
7035 	}
7036 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
7037 			"brightness is supported\n");
7038 
7039 	if (quirks & TPACPI_BRGHT_Q_ASK) {
7040 		pr_notice("brightness: will use unverified default: brightness_mode=%d\n",
7041 			  brightness_mode);
7042 		pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n",
7043 			  TPACPI_MAIL);
7044 	}
7045 
7046 	/* Added by mistake in early 2007.  Probably useless, but it could
7047 	 * be working around some unknown firmware problem where the value
7048 	 * read at startup doesn't match the real hardware state... so leave
7049 	 * it in place just in case */
7050 	backlight_update_status(ibm_backlight_device);
7051 
7052 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
7053 		    "brightness: registering brightness hotkeys as change notification\n");
7054 	tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7055 				| TP_ACPI_HKEY_BRGHTUP_MASK
7056 				| TP_ACPI_HKEY_BRGHTDWN_MASK);
7057 	return 0;
7058 }
7059 
7060 static void brightness_suspend(void)
7061 {
7062 	tpacpi_brightness_checkpoint_nvram();
7063 }
7064 
7065 static void brightness_shutdown(void)
7066 {
7067 	tpacpi_brightness_checkpoint_nvram();
7068 }
7069 
7070 static void brightness_exit(void)
7071 {
7072 	if (ibm_backlight_device) {
7073 		vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
7074 			    "calling backlight_device_unregister()\n");
7075 		backlight_device_unregister(ibm_backlight_device);
7076 	}
7077 
7078 	tpacpi_brightness_checkpoint_nvram();
7079 }
7080 
7081 static int brightness_read(struct seq_file *m)
7082 {
7083 	int level;
7084 
7085 	level = brightness_get(NULL);
7086 	if (level < 0) {
7087 		seq_printf(m, "level:\t\tunreadable\n");
7088 	} else {
7089 		seq_printf(m, "level:\t\t%d\n", level);
7090 		seq_printf(m, "commands:\tup, down\n");
7091 		seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7092 			       bright_maxlvl);
7093 	}
7094 
7095 	return 0;
7096 }
7097 
7098 static int brightness_write(char *buf)
7099 {
7100 	int level;
7101 	int rc;
7102 	char *cmd;
7103 
7104 	level = brightness_get(NULL);
7105 	if (level < 0)
7106 		return level;
7107 
7108 	while ((cmd = strsep(&buf, ","))) {
7109 		if (strlencmp(cmd, "up") == 0) {
7110 			if (level < bright_maxlvl)
7111 				level++;
7112 		} else if (strlencmp(cmd, "down") == 0) {
7113 			if (level > 0)
7114 				level--;
7115 		} else if (sscanf(cmd, "level %d", &level) == 1 &&
7116 			   level >= 0 && level <= bright_maxlvl) {
7117 			/* new level set */
7118 		} else
7119 			return -EINVAL;
7120 	}
7121 
7122 	tpacpi_disclose_usertask("procfs brightness",
7123 			"set level to %d\n", level);
7124 
7125 	/*
7126 	 * Now we know what the final level should be, so we try to set it.
7127 	 * Doing it this way makes the syscall restartable in case of EINTR
7128 	 */
7129 	rc = brightness_set(level);
7130 	if (!rc && ibm_backlight_device)
7131 		backlight_force_update(ibm_backlight_device,
7132 					BACKLIGHT_UPDATE_SYSFS);
7133 	return (rc == -EINTR) ? -ERESTARTSYS : rc;
7134 }
7135 
7136 static struct ibm_struct brightness_driver_data = {
7137 	.name = "brightness",
7138 	.read = brightness_read,
7139 	.write = brightness_write,
7140 	.exit = brightness_exit,
7141 	.suspend = brightness_suspend,
7142 	.shutdown = brightness_shutdown,
7143 };
7144 
7145 /*************************************************************************
7146  * Volume subdriver
7147  */
7148 
7149 /*
7150  * IBM ThinkPads have a simple volume controller with MUTE gating.
7151  * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
7152  *
7153  * Since the *61 series (and probably also the later *60 series), Lenovo
7154  * ThinkPads only implement the MUTE gate.
7155  *
7156  * EC register 0x30
7157  *   Bit 6: MUTE (1 mutes sound)
7158  *   Bit 3-0: Volume
7159  *   Other bits should be zero as far as we know.
7160  *
7161  * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
7162  * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
7163  * such as bit 7 which is used to detect repeated presses of MUTE,
7164  * and we leave them unchanged.
7165  *
7166  * On newer Lenovo ThinkPads, the EC can automatically change the volume
7167  * in response to user input.  Unfortunately, this rarely works well.
7168  * The laptop changes the state of its internal MUTE gate and, on some
7169  * models, sends KEY_MUTE, causing any user code that responds to the
7170  * mute button to get confused.  The hardware MUTE gate is also
7171  * unnecessary, since user code can handle the mute button without
7172  * kernel or EC help.
7173  *
7174  * To avoid confusing userspace, we simply disable all EC-based mute
7175  * and volume controls when possible.
7176  */
7177 
7178 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
7179 
7180 #define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
7181 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
7182 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
7183 
7184 #if SNDRV_CARDS <= 32
7185 #define DEFAULT_ALSA_IDX		~((1 << (SNDRV_CARDS - 3)) - 1)
7186 #else
7187 #define DEFAULT_ALSA_IDX		~((1 << (32 - 3)) - 1)
7188 #endif
7189 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
7190 static char *alsa_id = "ThinkPadEC";
7191 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
7192 
7193 struct tpacpi_alsa_data {
7194 	struct snd_card *card;
7195 	struct snd_ctl_elem_id *ctl_mute_id;
7196 	struct snd_ctl_elem_id *ctl_vol_id;
7197 };
7198 
7199 static struct snd_card *alsa_card;
7200 
7201 enum {
7202 	TP_EC_AUDIO = 0x30,
7203 
7204 	/* TP_EC_AUDIO bits */
7205 	TP_EC_AUDIO_MUTESW = 6,
7206 
7207 	/* TP_EC_AUDIO bitmasks */
7208 	TP_EC_AUDIO_LVL_MSK = 0x0F,
7209 	TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
7210 
7211 	/* Maximum volume */
7212 	TP_EC_VOLUME_MAX = 14,
7213 };
7214 
7215 enum tpacpi_volume_access_mode {
7216 	TPACPI_VOL_MODE_AUTO = 0,	/* Not implemented yet */
7217 	TPACPI_VOL_MODE_EC,		/* Pure EC control */
7218 	TPACPI_VOL_MODE_UCMS_STEP,	/* UCMS step-based control: N/A */
7219 	TPACPI_VOL_MODE_ECNVRAM,	/* EC control w/ NVRAM store */
7220 	TPACPI_VOL_MODE_MAX
7221 };
7222 
7223 enum tpacpi_volume_capabilities {
7224 	TPACPI_VOL_CAP_AUTO = 0,	/* Use white/blacklist */
7225 	TPACPI_VOL_CAP_VOLMUTE,		/* Output vol and mute */
7226 	TPACPI_VOL_CAP_MUTEONLY,	/* Output mute only */
7227 	TPACPI_VOL_CAP_MAX
7228 };
7229 
7230 enum tpacpi_mute_btn_mode {
7231 	TP_EC_MUTE_BTN_LATCH  = 0,	/* Mute mutes; up/down unmutes */
7232 	/* We don't know what mode 1 is. */
7233 	TP_EC_MUTE_BTN_NONE   = 2,	/* Mute and up/down are just keys */
7234 	TP_EC_MUTE_BTN_TOGGLE = 3,	/* Mute toggles; up/down unmutes */
7235 };
7236 
7237 static enum tpacpi_volume_access_mode volume_mode =
7238 	TPACPI_VOL_MODE_MAX;
7239 
7240 static enum tpacpi_volume_capabilities volume_capabilities;
7241 static bool volume_control_allowed;
7242 static bool software_mute_requested = true;
7243 static bool software_mute_active;
7244 static int software_mute_orig_mode;
7245 
7246 /*
7247  * Used to syncronize writers to TP_EC_AUDIO and
7248  * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
7249  */
7250 static struct mutex volume_mutex;
7251 
7252 static void tpacpi_volume_checkpoint_nvram(void)
7253 {
7254 	u8 lec = 0;
7255 	u8 b_nvram;
7256 	u8 ec_mask;
7257 
7258 	if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
7259 		return;
7260 	if (!volume_control_allowed)
7261 		return;
7262 	if (software_mute_active)
7263 		return;
7264 
7265 	vdbg_printk(TPACPI_DBG_MIXER,
7266 		"trying to checkpoint mixer state to NVRAM...\n");
7267 
7268 	if (tp_features.mixer_no_level_control)
7269 		ec_mask = TP_EC_AUDIO_MUTESW_MSK;
7270 	else
7271 		ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
7272 
7273 	if (mutex_lock_killable(&volume_mutex) < 0)
7274 		return;
7275 
7276 	if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
7277 		goto unlock;
7278 	lec &= ec_mask;
7279 	b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
7280 
7281 	if (lec != (b_nvram & ec_mask)) {
7282 		/* NVRAM needs update */
7283 		b_nvram &= ~ec_mask;
7284 		b_nvram |= lec;
7285 		nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
7286 		dbg_printk(TPACPI_DBG_MIXER,
7287 			   "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
7288 			   (unsigned int) lec, (unsigned int) b_nvram);
7289 	} else {
7290 		vdbg_printk(TPACPI_DBG_MIXER,
7291 			   "NVRAM mixer status already is 0x%02x (0x%02x)\n",
7292 			   (unsigned int) lec, (unsigned int) b_nvram);
7293 	}
7294 
7295 unlock:
7296 	mutex_unlock(&volume_mutex);
7297 }
7298 
7299 static int volume_get_status_ec(u8 *status)
7300 {
7301 	u8 s;
7302 
7303 	if (!acpi_ec_read(TP_EC_AUDIO, &s))
7304 		return -EIO;
7305 
7306 	*status = s;
7307 
7308 	dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
7309 
7310 	return 0;
7311 }
7312 
7313 static int volume_get_status(u8 *status)
7314 {
7315 	return volume_get_status_ec(status);
7316 }
7317 
7318 static int volume_set_status_ec(const u8 status)
7319 {
7320 	if (!acpi_ec_write(TP_EC_AUDIO, status))
7321 		return -EIO;
7322 
7323 	dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
7324 
7325 	/*
7326 	 * On X200s, and possibly on others, it can take a while for
7327 	 * reads to become correct.
7328 	 */
7329 	msleep(1);
7330 
7331 	return 0;
7332 }
7333 
7334 static int volume_set_status(const u8 status)
7335 {
7336 	return volume_set_status_ec(status);
7337 }
7338 
7339 /* returns < 0 on error, 0 on no change, 1 on change */
7340 static int __volume_set_mute_ec(const bool mute)
7341 {
7342 	int rc;
7343 	u8 s, n;
7344 
7345 	if (mutex_lock_killable(&volume_mutex) < 0)
7346 		return -EINTR;
7347 
7348 	rc = volume_get_status_ec(&s);
7349 	if (rc)
7350 		goto unlock;
7351 
7352 	n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
7353 		     s & ~TP_EC_AUDIO_MUTESW_MSK;
7354 
7355 	if (n != s) {
7356 		rc = volume_set_status_ec(n);
7357 		if (!rc)
7358 			rc = 1;
7359 	}
7360 
7361 unlock:
7362 	mutex_unlock(&volume_mutex);
7363 	return rc;
7364 }
7365 
7366 static int volume_alsa_set_mute(const bool mute)
7367 {
7368 	dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
7369 		   (mute) ? "" : "un");
7370 	return __volume_set_mute_ec(mute);
7371 }
7372 
7373 static int volume_set_mute(const bool mute)
7374 {
7375 	int rc;
7376 
7377 	dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
7378 		   (mute) ? "" : "un");
7379 
7380 	rc = __volume_set_mute_ec(mute);
7381 	return (rc < 0) ? rc : 0;
7382 }
7383 
7384 /* returns < 0 on error, 0 on no change, 1 on change */
7385 static int __volume_set_volume_ec(const u8 vol)
7386 {
7387 	int rc;
7388 	u8 s, n;
7389 
7390 	if (vol > TP_EC_VOLUME_MAX)
7391 		return -EINVAL;
7392 
7393 	if (mutex_lock_killable(&volume_mutex) < 0)
7394 		return -EINTR;
7395 
7396 	rc = volume_get_status_ec(&s);
7397 	if (rc)
7398 		goto unlock;
7399 
7400 	n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
7401 
7402 	if (n != s) {
7403 		rc = volume_set_status_ec(n);
7404 		if (!rc)
7405 			rc = 1;
7406 	}
7407 
7408 unlock:
7409 	mutex_unlock(&volume_mutex);
7410 	return rc;
7411 }
7412 
7413 static int volume_set_software_mute(bool startup)
7414 {
7415 	int result;
7416 
7417 	if (!tpacpi_is_lenovo())
7418 		return -ENODEV;
7419 
7420 	if (startup) {
7421 		if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
7422 				"HAUM", "qd"))
7423 			return -EIO;
7424 
7425 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7426 			    "Initial HAUM setting was %d\n",
7427 			    software_mute_orig_mode);
7428 	}
7429 
7430 	if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
7431 			(int)TP_EC_MUTE_BTN_NONE))
7432 		return -EIO;
7433 
7434 	if (result != TP_EC_MUTE_BTN_NONE)
7435 		pr_warn("Unexpected SAUM result %d\n",
7436 			result);
7437 
7438 	/*
7439 	 * In software mute mode, the standard codec controls take
7440 	 * precendence, so we unmute the ThinkPad HW switch at
7441 	 * startup.  Just on case there are SAUM-capable ThinkPads
7442 	 * with level controls, set max HW volume as well.
7443 	 */
7444 	if (tp_features.mixer_no_level_control)
7445 		result = volume_set_mute(false);
7446 	else
7447 		result = volume_set_status(TP_EC_VOLUME_MAX);
7448 
7449 	if (result != 0)
7450 		pr_warn("Failed to unmute the HW mute switch\n");
7451 
7452 	return 0;
7453 }
7454 
7455 static void volume_exit_software_mute(void)
7456 {
7457 	int r;
7458 
7459 	if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
7460 	    || r != software_mute_orig_mode)
7461 		pr_warn("Failed to restore mute mode\n");
7462 }
7463 
7464 static int volume_alsa_set_volume(const u8 vol)
7465 {
7466 	dbg_printk(TPACPI_DBG_MIXER,
7467 		   "ALSA: trying to set volume level to %hu\n", vol);
7468 	return __volume_set_volume_ec(vol);
7469 }
7470 
7471 static void volume_alsa_notify_change(void)
7472 {
7473 	struct tpacpi_alsa_data *d;
7474 
7475 	if (alsa_card && alsa_card->private_data) {
7476 		d = alsa_card->private_data;
7477 		if (d->ctl_mute_id)
7478 			snd_ctl_notify(alsa_card,
7479 					SNDRV_CTL_EVENT_MASK_VALUE,
7480 					d->ctl_mute_id);
7481 		if (d->ctl_vol_id)
7482 			snd_ctl_notify(alsa_card,
7483 					SNDRV_CTL_EVENT_MASK_VALUE,
7484 					d->ctl_vol_id);
7485 	}
7486 }
7487 
7488 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
7489 				struct snd_ctl_elem_info *uinfo)
7490 {
7491 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
7492 	uinfo->count = 1;
7493 	uinfo->value.integer.min = 0;
7494 	uinfo->value.integer.max = TP_EC_VOLUME_MAX;
7495 	return 0;
7496 }
7497 
7498 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
7499 				struct snd_ctl_elem_value *ucontrol)
7500 {
7501 	u8 s;
7502 	int rc;
7503 
7504 	rc = volume_get_status(&s);
7505 	if (rc < 0)
7506 		return rc;
7507 
7508 	ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
7509 	return 0;
7510 }
7511 
7512 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
7513 				struct snd_ctl_elem_value *ucontrol)
7514 {
7515 	tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
7516 				 ucontrol->value.integer.value[0]);
7517 	return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
7518 }
7519 
7520 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
7521 
7522 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
7523 				struct snd_ctl_elem_value *ucontrol)
7524 {
7525 	u8 s;
7526 	int rc;
7527 
7528 	rc = volume_get_status(&s);
7529 	if (rc < 0)
7530 		return rc;
7531 
7532 	ucontrol->value.integer.value[0] =
7533 				(s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
7534 	return 0;
7535 }
7536 
7537 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
7538 				struct snd_ctl_elem_value *ucontrol)
7539 {
7540 	tpacpi_disclose_usertask("ALSA", "%smute\n",
7541 				 ucontrol->value.integer.value[0] ?
7542 					"un" : "");
7543 	return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
7544 }
7545 
7546 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
7547 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7548 	.name = "Console Playback Volume",
7549 	.index = 0,
7550 	.access = SNDRV_CTL_ELEM_ACCESS_READ,
7551 	.info = volume_alsa_vol_info,
7552 	.get = volume_alsa_vol_get,
7553 };
7554 
7555 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
7556 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7557 	.name = "Console Playback Switch",
7558 	.index = 0,
7559 	.access = SNDRV_CTL_ELEM_ACCESS_READ,
7560 	.info = volume_alsa_mute_info,
7561 	.get = volume_alsa_mute_get,
7562 };
7563 
7564 static void volume_suspend(void)
7565 {
7566 	tpacpi_volume_checkpoint_nvram();
7567 }
7568 
7569 static void volume_resume(void)
7570 {
7571 	if (software_mute_active) {
7572 		if (volume_set_software_mute(false) < 0)
7573 			pr_warn("Failed to restore software mute\n");
7574 	} else {
7575 		volume_alsa_notify_change();
7576 	}
7577 }
7578 
7579 static void volume_shutdown(void)
7580 {
7581 	tpacpi_volume_checkpoint_nvram();
7582 }
7583 
7584 static void volume_exit(void)
7585 {
7586 	if (alsa_card) {
7587 		snd_card_free(alsa_card);
7588 		alsa_card = NULL;
7589 	}
7590 
7591 	tpacpi_volume_checkpoint_nvram();
7592 
7593 	if (software_mute_active)
7594 		volume_exit_software_mute();
7595 }
7596 
7597 static int __init volume_create_alsa_mixer(void)
7598 {
7599 	struct snd_card *card;
7600 	struct tpacpi_alsa_data *data;
7601 	struct snd_kcontrol *ctl_vol;
7602 	struct snd_kcontrol *ctl_mute;
7603 	int rc;
7604 
7605 	rc = snd_card_new(&tpacpi_pdev->dev,
7606 			  alsa_index, alsa_id, THIS_MODULE,
7607 			  sizeof(struct tpacpi_alsa_data), &card);
7608 	if (rc < 0 || !card) {
7609 		pr_err("Failed to create ALSA card structures: %d\n", rc);
7610 		return 1;
7611 	}
7612 
7613 	BUG_ON(!card->private_data);
7614 	data = card->private_data;
7615 	data->card = card;
7616 
7617 	strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
7618 		sizeof(card->driver));
7619 	strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
7620 		sizeof(card->shortname));
7621 	snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
7622 		 (thinkpad_id.ec_version_str) ?
7623 			thinkpad_id.ec_version_str : "(unknown)");
7624 	snprintf(card->longname, sizeof(card->longname),
7625 		 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
7626 		 (thinkpad_id.ec_version_str) ?
7627 			thinkpad_id.ec_version_str : "unknown");
7628 
7629 	if (volume_control_allowed) {
7630 		volume_alsa_control_vol.put = volume_alsa_vol_put;
7631 		volume_alsa_control_vol.access =
7632 				SNDRV_CTL_ELEM_ACCESS_READWRITE;
7633 
7634 		volume_alsa_control_mute.put = volume_alsa_mute_put;
7635 		volume_alsa_control_mute.access =
7636 				SNDRV_CTL_ELEM_ACCESS_READWRITE;
7637 	}
7638 
7639 	if (!tp_features.mixer_no_level_control) {
7640 		ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
7641 		rc = snd_ctl_add(card, ctl_vol);
7642 		if (rc < 0) {
7643 			pr_err("Failed to create ALSA volume control: %d\n",
7644 			       rc);
7645 			goto err_exit;
7646 		}
7647 		data->ctl_vol_id = &ctl_vol->id;
7648 	}
7649 
7650 	ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
7651 	rc = snd_ctl_add(card, ctl_mute);
7652 	if (rc < 0) {
7653 		pr_err("Failed to create ALSA mute control: %d\n", rc);
7654 		goto err_exit;
7655 	}
7656 	data->ctl_mute_id = &ctl_mute->id;
7657 
7658 	rc = snd_card_register(card);
7659 	if (rc < 0) {
7660 		pr_err("Failed to register ALSA card: %d\n", rc);
7661 		goto err_exit;
7662 	}
7663 
7664 	alsa_card = card;
7665 	return 0;
7666 
7667 err_exit:
7668 	snd_card_free(card);
7669 	return 1;
7670 }
7671 
7672 #define TPACPI_VOL_Q_MUTEONLY	0x0001	/* Mute-only control available */
7673 #define TPACPI_VOL_Q_LEVEL	0x0002  /* Volume control available */
7674 
7675 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
7676 	/* Whitelist volume level on all IBM by default */
7677 	{ .vendor = PCI_VENDOR_ID_IBM,
7678 	  .bios   = TPACPI_MATCH_ANY,
7679 	  .ec     = TPACPI_MATCH_ANY,
7680 	  .quirks = TPACPI_VOL_Q_LEVEL },
7681 
7682 	/* Lenovo models with volume control (needs confirmation) */
7683 	TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
7684 	TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
7685 	TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
7686 	TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
7687 	TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
7688 	TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
7689 	TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
7690 
7691 	/* Whitelist mute-only on all Lenovo by default */
7692 	{ .vendor = PCI_VENDOR_ID_LENOVO,
7693 	  .bios   = TPACPI_MATCH_ANY,
7694 	  .ec	  = TPACPI_MATCH_ANY,
7695 	  .quirks = TPACPI_VOL_Q_MUTEONLY }
7696 };
7697 
7698 static int __init volume_init(struct ibm_init_struct *iibm)
7699 {
7700 	unsigned long quirks;
7701 	int rc;
7702 
7703 	vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
7704 
7705 	mutex_init(&volume_mutex);
7706 
7707 	/*
7708 	 * Check for module parameter bogosity, note that we
7709 	 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
7710 	 * able to detect "unspecified"
7711 	 */
7712 	if (volume_mode > TPACPI_VOL_MODE_MAX)
7713 		return -EINVAL;
7714 
7715 	if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
7716 		pr_err("UCMS step volume mode not implemented, please contact %s\n",
7717 		       TPACPI_MAIL);
7718 		return 1;
7719 	}
7720 
7721 	if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
7722 		return -EINVAL;
7723 
7724 	/*
7725 	 * The ALSA mixer is our primary interface.
7726 	 * When disabled, don't install the subdriver at all
7727 	 */
7728 	if (!alsa_enable) {
7729 		vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7730 			    "ALSA mixer disabled by parameter, not loading volume subdriver...\n");
7731 		return 1;
7732 	}
7733 
7734 	quirks = tpacpi_check_quirks(volume_quirk_table,
7735 				     ARRAY_SIZE(volume_quirk_table));
7736 
7737 	switch (volume_capabilities) {
7738 	case TPACPI_VOL_CAP_AUTO:
7739 		if (quirks & TPACPI_VOL_Q_MUTEONLY)
7740 			tp_features.mixer_no_level_control = 1;
7741 		else if (quirks & TPACPI_VOL_Q_LEVEL)
7742 			tp_features.mixer_no_level_control = 0;
7743 		else
7744 			return 1; /* no mixer */
7745 		break;
7746 	case TPACPI_VOL_CAP_VOLMUTE:
7747 		tp_features.mixer_no_level_control = 0;
7748 		break;
7749 	case TPACPI_VOL_CAP_MUTEONLY:
7750 		tp_features.mixer_no_level_control = 1;
7751 		break;
7752 	default:
7753 		return 1;
7754 	}
7755 
7756 	if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
7757 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7758 				"using user-supplied volume_capabilities=%d\n",
7759 				volume_capabilities);
7760 
7761 	if (volume_mode == TPACPI_VOL_MODE_AUTO ||
7762 	    volume_mode == TPACPI_VOL_MODE_MAX) {
7763 		volume_mode = TPACPI_VOL_MODE_ECNVRAM;
7764 
7765 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7766 				"driver auto-selected volume_mode=%d\n",
7767 				volume_mode);
7768 	} else {
7769 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7770 				"using user-supplied volume_mode=%d\n",
7771 				volume_mode);
7772 	}
7773 
7774 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7775 			"mute is supported, volume control is %s\n",
7776 			str_supported(!tp_features.mixer_no_level_control));
7777 
7778 	if (software_mute_requested && volume_set_software_mute(true) == 0) {
7779 		software_mute_active = true;
7780 	} else {
7781 		rc = volume_create_alsa_mixer();
7782 		if (rc) {
7783 			pr_err("Could not create the ALSA mixer interface\n");
7784 			return rc;
7785 		}
7786 
7787 		pr_info("Console audio control enabled, mode: %s\n",
7788 			(volume_control_allowed) ?
7789 				"override (read/write)" :
7790 				"monitor (read only)");
7791 	}
7792 
7793 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7794 		"registering volume hotkeys as change notification\n");
7795 	tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7796 			| TP_ACPI_HKEY_VOLUP_MASK
7797 			| TP_ACPI_HKEY_VOLDWN_MASK
7798 			| TP_ACPI_HKEY_MUTE_MASK);
7799 
7800 	return 0;
7801 }
7802 
7803 static int volume_read(struct seq_file *m)
7804 {
7805 	u8 status;
7806 
7807 	if (volume_get_status(&status) < 0) {
7808 		seq_printf(m, "level:\t\tunreadable\n");
7809 	} else {
7810 		if (tp_features.mixer_no_level_control)
7811 			seq_printf(m, "level:\t\tunsupported\n");
7812 		else
7813 			seq_printf(m, "level:\t\t%d\n",
7814 					status & TP_EC_AUDIO_LVL_MSK);
7815 
7816 		seq_printf(m, "mute:\t\t%s\n",
7817 				onoff(status, TP_EC_AUDIO_MUTESW));
7818 
7819 		if (volume_control_allowed) {
7820 			seq_printf(m, "commands:\tunmute, mute\n");
7821 			if (!tp_features.mixer_no_level_control) {
7822 				seq_printf(m, "commands:\tup, down\n");
7823 				seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7824 					      TP_EC_VOLUME_MAX);
7825 			}
7826 		}
7827 	}
7828 
7829 	return 0;
7830 }
7831 
7832 static int volume_write(char *buf)
7833 {
7834 	u8 s;
7835 	u8 new_level, new_mute;
7836 	int l;
7837 	char *cmd;
7838 	int rc;
7839 
7840 	/*
7841 	 * We do allow volume control at driver startup, so that the
7842 	 * user can set initial state through the volume=... parameter hack.
7843 	 */
7844 	if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7845 		if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7846 			tp_warned.volume_ctrl_forbidden = 1;
7847 			pr_notice("Console audio control in monitor mode, changes are not allowed\n");
7848 			pr_notice("Use the volume_control=1 module parameter to enable volume control\n");
7849 		}
7850 		return -EPERM;
7851 	}
7852 
7853 	rc = volume_get_status(&s);
7854 	if (rc < 0)
7855 		return rc;
7856 
7857 	new_level = s & TP_EC_AUDIO_LVL_MSK;
7858 	new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
7859 
7860 	while ((cmd = strsep(&buf, ","))) {
7861 		if (!tp_features.mixer_no_level_control) {
7862 			if (strlencmp(cmd, "up") == 0) {
7863 				if (new_mute)
7864 					new_mute = 0;
7865 				else if (new_level < TP_EC_VOLUME_MAX)
7866 					new_level++;
7867 				continue;
7868 			} else if (strlencmp(cmd, "down") == 0) {
7869 				if (new_mute)
7870 					new_mute = 0;
7871 				else if (new_level > 0)
7872 					new_level--;
7873 				continue;
7874 			} else if (sscanf(cmd, "level %u", &l) == 1 &&
7875 				   l >= 0 && l <= TP_EC_VOLUME_MAX) {
7876 					new_level = l;
7877 				continue;
7878 			}
7879 		}
7880 		if (strlencmp(cmd, "mute") == 0)
7881 			new_mute = TP_EC_AUDIO_MUTESW_MSK;
7882 		else if (strlencmp(cmd, "unmute") == 0)
7883 			new_mute = 0;
7884 		else
7885 			return -EINVAL;
7886 	}
7887 
7888 	if (tp_features.mixer_no_level_control) {
7889 		tpacpi_disclose_usertask("procfs volume", "%smute\n",
7890 					new_mute ? "" : "un");
7891 		rc = volume_set_mute(!!new_mute);
7892 	} else {
7893 		tpacpi_disclose_usertask("procfs volume",
7894 					"%smute and set level to %d\n",
7895 					new_mute ? "" : "un", new_level);
7896 		rc = volume_set_status(new_mute | new_level);
7897 	}
7898 	volume_alsa_notify_change();
7899 
7900 	return (rc == -EINTR) ? -ERESTARTSYS : rc;
7901 }
7902 
7903 static struct ibm_struct volume_driver_data = {
7904 	.name = "volume",
7905 	.read = volume_read,
7906 	.write = volume_write,
7907 	.exit = volume_exit,
7908 	.suspend = volume_suspend,
7909 	.resume = volume_resume,
7910 	.shutdown = volume_shutdown,
7911 };
7912 
7913 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7914 
7915 #define alsa_card NULL
7916 
7917 static inline void volume_alsa_notify_change(void)
7918 {
7919 }
7920 
7921 static int __init volume_init(struct ibm_init_struct *iibm)
7922 {
7923 	pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7924 
7925 	return 1;
7926 }
7927 
7928 static struct ibm_struct volume_driver_data = {
7929 	.name = "volume",
7930 };
7931 
7932 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7933 
7934 /*************************************************************************
7935  * Fan subdriver
7936  */
7937 
7938 /*
7939  * FAN ACCESS MODES
7940  *
7941  * TPACPI_FAN_RD_ACPI_GFAN:
7942  * 	ACPI GFAN method: returns fan level
7943  *
7944  * 	see TPACPI_FAN_WR_ACPI_SFAN
7945  * 	EC 0x2f (HFSP) not available if GFAN exists
7946  *
7947  * TPACPI_FAN_WR_ACPI_SFAN:
7948  * 	ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7949  *
7950  * 	EC 0x2f (HFSP) might be available *for reading*, but do not use
7951  * 	it for writing.
7952  *
7953  * TPACPI_FAN_WR_TPEC:
7954  * 	ThinkPad EC register 0x2f (HFSP): fan control loop mode
7955  * 	Supported on almost all ThinkPads
7956  *
7957  * 	Fan speed changes of any sort (including those caused by the
7958  * 	disengaged mode) are usually done slowly by the firmware as the
7959  * 	maximum amount of fan duty cycle change per second seems to be
7960  * 	limited.
7961  *
7962  * 	Reading is not available if GFAN exists.
7963  * 	Writing is not available if SFAN exists.
7964  *
7965  * 	Bits
7966  *	 7	automatic mode engaged;
7967  *  		(default operation mode of the ThinkPad)
7968  * 		fan level is ignored in this mode.
7969  *	 6	full speed mode (takes precedence over bit 7);
7970  *		not available on all thinkpads.  May disable
7971  *		the tachometer while the fan controller ramps up
7972  *		the speed (which can take up to a few *minutes*).
7973  *		Speeds up fan to 100% duty-cycle, which is far above
7974  *		the standard RPM levels.  It is not impossible that
7975  *		it could cause hardware damage.
7976  *	5-3	unused in some models.  Extra bits for fan level
7977  *		in others, but still useless as all values above
7978  *		7 map to the same speed as level 7 in these models.
7979  *	2-0	fan level (0..7 usually)
7980  *			0x00 = stop
7981  * 			0x07 = max (set when temperatures critical)
7982  * 		Some ThinkPads may have other levels, see
7983  * 		TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7984  *
7985  *	FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7986  *	boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7987  *	does so, its initial value is meaningless (0x07).
7988  *
7989  *	For firmware bugs, refer to:
7990  *	https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7991  *
7992  * 	----
7993  *
7994  *	ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7995  *	Main fan tachometer reading (in RPM)
7996  *
7997  *	This register is present on all ThinkPads with a new-style EC, and
7998  *	it is known not to be present on the A21m/e, and T22, as there is
7999  *	something else in offset 0x84 according to the ACPI DSDT.  Other
8000  *	ThinkPads from this same time period (and earlier) probably lack the
8001  *	tachometer as well.
8002  *
8003  *	Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
8004  *	was never fixed by IBM to report the EC firmware version string
8005  *	probably support the tachometer (like the early X models), so
8006  *	detecting it is quite hard.  We need more data to know for sure.
8007  *
8008  *	FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
8009  *	might result.
8010  *
8011  *	FIRMWARE BUG: may go stale while the EC is switching to full speed
8012  *	mode.
8013  *
8014  *	For firmware bugs, refer to:
8015  *	https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
8016  *
8017  *	----
8018  *
8019  *	ThinkPad EC register 0x31 bit 0 (only on select models)
8020  *
8021  *	When bit 0 of EC register 0x31 is zero, the tachometer registers
8022  *	show the speed of the main fan.  When bit 0 of EC register 0x31
8023  *	is one, the tachometer registers show the speed of the auxiliary
8024  *	fan.
8025  *
8026  *	Fan control seems to affect both fans, regardless of the state
8027  *	of this bit.
8028  *
8029  *	So far, only the firmware for the X60/X61 non-tablet versions
8030  *	seem to support this (firmware TP-7M).
8031  *
8032  * TPACPI_FAN_WR_ACPI_FANS:
8033  *	ThinkPad X31, X40, X41.  Not available in the X60.
8034  *
8035  *	FANS ACPI handle: takes three arguments: low speed, medium speed,
8036  *	high speed.  ACPI DSDT seems to map these three speeds to levels
8037  *	as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
8038  *	(this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
8039  *
8040  * 	The speeds are stored on handles
8041  * 	(FANA:FAN9), (FANC:FANB), (FANE:FAND).
8042  *
8043  * 	There are three default speed sets, accessible as handles:
8044  * 	FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
8045  *
8046  * 	ACPI DSDT switches which set is in use depending on various
8047  * 	factors.
8048  *
8049  * 	TPACPI_FAN_WR_TPEC is also available and should be used to
8050  * 	command the fan.  The X31/X40/X41 seems to have 8 fan levels,
8051  * 	but the ACPI tables just mention level 7.
8052  */
8053 
8054 enum {					/* Fan control constants */
8055 	fan_status_offset = 0x2f,	/* EC register 0x2f */
8056 	fan_rpm_offset = 0x84,		/* EC register 0x84: LSB, 0x85 MSB (RPM)
8057 					 * 0x84 must be read before 0x85 */
8058 	fan_select_offset = 0x31,	/* EC register 0x31 (Firmware 7M)
8059 					   bit 0 selects which fan is active */
8060 
8061 	TP_EC_FAN_FULLSPEED = 0x40,	/* EC fan mode: full speed */
8062 	TP_EC_FAN_AUTO	    = 0x80,	/* EC fan mode: auto fan control */
8063 
8064 	TPACPI_FAN_LAST_LEVEL = 0x100,	/* Use cached last-seen fan level */
8065 };
8066 
8067 enum fan_status_access_mode {
8068 	TPACPI_FAN_NONE = 0,		/* No fan status or control */
8069 	TPACPI_FAN_RD_ACPI_GFAN,	/* Use ACPI GFAN */
8070 	TPACPI_FAN_RD_TPEC,		/* Use ACPI EC regs 0x2f, 0x84-0x85 */
8071 };
8072 
8073 enum fan_control_access_mode {
8074 	TPACPI_FAN_WR_NONE = 0,		/* No fan control */
8075 	TPACPI_FAN_WR_ACPI_SFAN,	/* Use ACPI SFAN */
8076 	TPACPI_FAN_WR_TPEC,		/* Use ACPI EC reg 0x2f */
8077 	TPACPI_FAN_WR_ACPI_FANS,	/* Use ACPI FANS and EC reg 0x2f */
8078 };
8079 
8080 enum fan_control_commands {
8081 	TPACPI_FAN_CMD_SPEED 	= 0x0001,	/* speed command */
8082 	TPACPI_FAN_CMD_LEVEL 	= 0x0002,	/* level command  */
8083 	TPACPI_FAN_CMD_ENABLE	= 0x0004,	/* enable/disable cmd,
8084 						 * and also watchdog cmd */
8085 };
8086 
8087 static bool fan_control_allowed;
8088 
8089 static enum fan_status_access_mode fan_status_access_mode;
8090 static enum fan_control_access_mode fan_control_access_mode;
8091 static enum fan_control_commands fan_control_commands;
8092 
8093 static u8 fan_control_initial_status;
8094 static u8 fan_control_desired_level;
8095 static u8 fan_control_resume_level;
8096 static int fan_watchdog_maxinterval;
8097 
8098 static struct mutex fan_mutex;
8099 
8100 static void fan_watchdog_fire(struct work_struct *ignored);
8101 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
8102 
8103 TPACPI_HANDLE(fans, ec, "FANS");	/* X31, X40, X41 */
8104 TPACPI_HANDLE(gfan, ec, "GFAN",	/* 570 */
8105 	   "\\FSPD",		/* 600e/x, 770e, 770x */
8106 	   );			/* all others */
8107 TPACPI_HANDLE(sfan, ec, "SFAN",	/* 570 */
8108 	   "JFNS",		/* 770x-JL */
8109 	   );			/* all others */
8110 
8111 /*
8112  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
8113  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
8114  * be in auto mode (0x80).
8115  *
8116  * This is corrected by any write to HFSP either by the driver, or
8117  * by the firmware.
8118  *
8119  * We assume 0x07 really means auto mode while this quirk is active,
8120  * as this is far more likely than the ThinkPad being in level 7,
8121  * which is only used by the firmware during thermal emergencies.
8122  *
8123  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
8124  * TP-70 (T43, R52), which are known to be buggy.
8125  */
8126 
8127 static void fan_quirk1_setup(void)
8128 {
8129 	if (fan_control_initial_status == 0x07) {
8130 		pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n");
8131 		tp_features.fan_ctrl_status_undef = 1;
8132 	}
8133 }
8134 
8135 static void fan_quirk1_handle(u8 *fan_status)
8136 {
8137 	if (unlikely(tp_features.fan_ctrl_status_undef)) {
8138 		if (*fan_status != fan_control_initial_status) {
8139 			/* something changed the HFSP regisnter since
8140 			 * driver init time, so it is not undefined
8141 			 * anymore */
8142 			tp_features.fan_ctrl_status_undef = 0;
8143 		} else {
8144 			/* Return most likely status. In fact, it
8145 			 * might be the only possible status */
8146 			*fan_status = TP_EC_FAN_AUTO;
8147 		}
8148 	}
8149 }
8150 
8151 /* Select main fan on X60/X61, NOOP on others */
8152 static bool fan_select_fan1(void)
8153 {
8154 	if (tp_features.second_fan) {
8155 		u8 val;
8156 
8157 		if (ec_read(fan_select_offset, &val) < 0)
8158 			return false;
8159 		val &= 0xFEU;
8160 		if (ec_write(fan_select_offset, val) < 0)
8161 			return false;
8162 	}
8163 	return true;
8164 }
8165 
8166 /* Select secondary fan on X60/X61 */
8167 static bool fan_select_fan2(void)
8168 {
8169 	u8 val;
8170 
8171 	if (!tp_features.second_fan)
8172 		return false;
8173 
8174 	if (ec_read(fan_select_offset, &val) < 0)
8175 		return false;
8176 	val |= 0x01U;
8177 	if (ec_write(fan_select_offset, val) < 0)
8178 		return false;
8179 
8180 	return true;
8181 }
8182 
8183 /*
8184  * Call with fan_mutex held
8185  */
8186 static void fan_update_desired_level(u8 status)
8187 {
8188 	if ((status &
8189 	     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8190 		if (status > 7)
8191 			fan_control_desired_level = 7;
8192 		else
8193 			fan_control_desired_level = status;
8194 	}
8195 }
8196 
8197 static int fan_get_status(u8 *status)
8198 {
8199 	u8 s;
8200 
8201 	/* TODO:
8202 	 * Add TPACPI_FAN_RD_ACPI_FANS ? */
8203 
8204 	switch (fan_status_access_mode) {
8205 	case TPACPI_FAN_RD_ACPI_GFAN: {
8206 		/* 570, 600e/x, 770e, 770x */
8207 		int res;
8208 
8209 		if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
8210 			return -EIO;
8211 
8212 		if (likely(status))
8213 			*status = res & 0x07;
8214 
8215 		break;
8216 	}
8217 	case TPACPI_FAN_RD_TPEC:
8218 		/* all except 570, 600e/x, 770e, 770x */
8219 		if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
8220 			return -EIO;
8221 
8222 		if (likely(status)) {
8223 			*status = s;
8224 			fan_quirk1_handle(status);
8225 		}
8226 
8227 		break;
8228 
8229 	default:
8230 		return -ENXIO;
8231 	}
8232 
8233 	return 0;
8234 }
8235 
8236 static int fan_get_status_safe(u8 *status)
8237 {
8238 	int rc;
8239 	u8 s;
8240 
8241 	if (mutex_lock_killable(&fan_mutex))
8242 		return -ERESTARTSYS;
8243 	rc = fan_get_status(&s);
8244 	if (!rc)
8245 		fan_update_desired_level(s);
8246 	mutex_unlock(&fan_mutex);
8247 
8248 	if (rc)
8249 		return rc;
8250 	if (status)
8251 		*status = s;
8252 
8253 	return 0;
8254 }
8255 
8256 static int fan_get_speed(unsigned int *speed)
8257 {
8258 	u8 hi, lo;
8259 
8260 	switch (fan_status_access_mode) {
8261 	case TPACPI_FAN_RD_TPEC:
8262 		/* all except 570, 600e/x, 770e, 770x */
8263 		if (unlikely(!fan_select_fan1()))
8264 			return -EIO;
8265 		if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
8266 			     !acpi_ec_read(fan_rpm_offset + 1, &hi)))
8267 			return -EIO;
8268 
8269 		if (likely(speed))
8270 			*speed = (hi << 8) | lo;
8271 
8272 		break;
8273 
8274 	default:
8275 		return -ENXIO;
8276 	}
8277 
8278 	return 0;
8279 }
8280 
8281 static int fan2_get_speed(unsigned int *speed)
8282 {
8283 	u8 hi, lo;
8284 	bool rc;
8285 
8286 	switch (fan_status_access_mode) {
8287 	case TPACPI_FAN_RD_TPEC:
8288 		/* all except 570, 600e/x, 770e, 770x */
8289 		if (unlikely(!fan_select_fan2()))
8290 			return -EIO;
8291 		rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
8292 			     !acpi_ec_read(fan_rpm_offset + 1, &hi);
8293 		fan_select_fan1(); /* play it safe */
8294 		if (rc)
8295 			return -EIO;
8296 
8297 		if (likely(speed))
8298 			*speed = (hi << 8) | lo;
8299 
8300 		break;
8301 
8302 	default:
8303 		return -ENXIO;
8304 	}
8305 
8306 	return 0;
8307 }
8308 
8309 static int fan_set_level(int level)
8310 {
8311 	if (!fan_control_allowed)
8312 		return -EPERM;
8313 
8314 	switch (fan_control_access_mode) {
8315 	case TPACPI_FAN_WR_ACPI_SFAN:
8316 		if ((level < 0) || (level > 7))
8317 			return -EINVAL;
8318 
8319 		if (tp_features.second_fan_ctl) {
8320 			if (!fan_select_fan2() ||
8321 			    !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) {
8322 				pr_warn("Couldn't set 2nd fan level, disabling support\n");
8323 				tp_features.second_fan_ctl = 0;
8324 			}
8325 			fan_select_fan1();
8326 		}
8327 		if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
8328 			return -EIO;
8329 		break;
8330 
8331 	case TPACPI_FAN_WR_ACPI_FANS:
8332 	case TPACPI_FAN_WR_TPEC:
8333 		if (!(level & TP_EC_FAN_AUTO) &&
8334 		    !(level & TP_EC_FAN_FULLSPEED) &&
8335 		    ((level < 0) || (level > 7)))
8336 			return -EINVAL;
8337 
8338 		/* safety net should the EC not support AUTO
8339 		 * or FULLSPEED mode bits and just ignore them */
8340 		if (level & TP_EC_FAN_FULLSPEED)
8341 			level |= 7;	/* safety min speed 7 */
8342 		else if (level & TP_EC_FAN_AUTO)
8343 			level |= 4;	/* safety min speed 4 */
8344 
8345 		if (tp_features.second_fan_ctl) {
8346 			if (!fan_select_fan2() ||
8347 			    !acpi_ec_write(fan_status_offset, level)) {
8348 				pr_warn("Couldn't set 2nd fan level, disabling support\n");
8349 				tp_features.second_fan_ctl = 0;
8350 			}
8351 			fan_select_fan1();
8352 
8353 		}
8354 		if (!acpi_ec_write(fan_status_offset, level))
8355 			return -EIO;
8356 		else
8357 			tp_features.fan_ctrl_status_undef = 0;
8358 		break;
8359 
8360 	default:
8361 		return -ENXIO;
8362 	}
8363 
8364 	vdbg_printk(TPACPI_DBG_FAN,
8365 		"fan control: set fan control register to 0x%02x\n", level);
8366 	return 0;
8367 }
8368 
8369 static int fan_set_level_safe(int level)
8370 {
8371 	int rc;
8372 
8373 	if (!fan_control_allowed)
8374 		return -EPERM;
8375 
8376 	if (mutex_lock_killable(&fan_mutex))
8377 		return -ERESTARTSYS;
8378 
8379 	if (level == TPACPI_FAN_LAST_LEVEL)
8380 		level = fan_control_desired_level;
8381 
8382 	rc = fan_set_level(level);
8383 	if (!rc)
8384 		fan_update_desired_level(level);
8385 
8386 	mutex_unlock(&fan_mutex);
8387 	return rc;
8388 }
8389 
8390 static int fan_set_enable(void)
8391 {
8392 	u8 s;
8393 	int rc;
8394 
8395 	if (!fan_control_allowed)
8396 		return -EPERM;
8397 
8398 	if (mutex_lock_killable(&fan_mutex))
8399 		return -ERESTARTSYS;
8400 
8401 	switch (fan_control_access_mode) {
8402 	case TPACPI_FAN_WR_ACPI_FANS:
8403 	case TPACPI_FAN_WR_TPEC:
8404 		rc = fan_get_status(&s);
8405 		if (rc < 0)
8406 			break;
8407 
8408 		/* Don't go out of emergency fan mode */
8409 		if (s != 7) {
8410 			s &= 0x07;
8411 			s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
8412 		}
8413 
8414 		if (!acpi_ec_write(fan_status_offset, s))
8415 			rc = -EIO;
8416 		else {
8417 			tp_features.fan_ctrl_status_undef = 0;
8418 			rc = 0;
8419 		}
8420 		break;
8421 
8422 	case TPACPI_FAN_WR_ACPI_SFAN:
8423 		rc = fan_get_status(&s);
8424 		if (rc < 0)
8425 			break;
8426 
8427 		s &= 0x07;
8428 
8429 		/* Set fan to at least level 4 */
8430 		s |= 4;
8431 
8432 		if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
8433 			rc = -EIO;
8434 		else
8435 			rc = 0;
8436 		break;
8437 
8438 	default:
8439 		rc = -ENXIO;
8440 	}
8441 
8442 	mutex_unlock(&fan_mutex);
8443 
8444 	if (!rc)
8445 		vdbg_printk(TPACPI_DBG_FAN,
8446 			"fan control: set fan control register to 0x%02x\n",
8447 			s);
8448 	return rc;
8449 }
8450 
8451 static int fan_set_disable(void)
8452 {
8453 	int rc;
8454 
8455 	if (!fan_control_allowed)
8456 		return -EPERM;
8457 
8458 	if (mutex_lock_killable(&fan_mutex))
8459 		return -ERESTARTSYS;
8460 
8461 	rc = 0;
8462 	switch (fan_control_access_mode) {
8463 	case TPACPI_FAN_WR_ACPI_FANS:
8464 	case TPACPI_FAN_WR_TPEC:
8465 		if (!acpi_ec_write(fan_status_offset, 0x00))
8466 			rc = -EIO;
8467 		else {
8468 			fan_control_desired_level = 0;
8469 			tp_features.fan_ctrl_status_undef = 0;
8470 		}
8471 		break;
8472 
8473 	case TPACPI_FAN_WR_ACPI_SFAN:
8474 		if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
8475 			rc = -EIO;
8476 		else
8477 			fan_control_desired_level = 0;
8478 		break;
8479 
8480 	default:
8481 		rc = -ENXIO;
8482 	}
8483 
8484 	if (!rc)
8485 		vdbg_printk(TPACPI_DBG_FAN,
8486 			"fan control: set fan control register to 0\n");
8487 
8488 	mutex_unlock(&fan_mutex);
8489 	return rc;
8490 }
8491 
8492 static int fan_set_speed(int speed)
8493 {
8494 	int rc;
8495 
8496 	if (!fan_control_allowed)
8497 		return -EPERM;
8498 
8499 	if (mutex_lock_killable(&fan_mutex))
8500 		return -ERESTARTSYS;
8501 
8502 	rc = 0;
8503 	switch (fan_control_access_mode) {
8504 	case TPACPI_FAN_WR_ACPI_FANS:
8505 		if (speed >= 0 && speed <= 65535) {
8506 			if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
8507 					speed, speed, speed))
8508 				rc = -EIO;
8509 		} else
8510 			rc = -EINVAL;
8511 		break;
8512 
8513 	default:
8514 		rc = -ENXIO;
8515 	}
8516 
8517 	mutex_unlock(&fan_mutex);
8518 	return rc;
8519 }
8520 
8521 static void fan_watchdog_reset(void)
8522 {
8523 	if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
8524 		return;
8525 
8526 	if (fan_watchdog_maxinterval > 0 &&
8527 	    tpacpi_lifecycle != TPACPI_LIFE_EXITING)
8528 		mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
8529 			msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
8530 	else
8531 		cancel_delayed_work(&fan_watchdog_task);
8532 }
8533 
8534 static void fan_watchdog_fire(struct work_struct *ignored)
8535 {
8536 	int rc;
8537 
8538 	if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
8539 		return;
8540 
8541 	pr_notice("fan watchdog: enabling fan\n");
8542 	rc = fan_set_enable();
8543 	if (rc < 0) {
8544 		pr_err("fan watchdog: error %d while enabling fan, will try again later...\n",
8545 		       rc);
8546 		/* reschedule for later */
8547 		fan_watchdog_reset();
8548 	}
8549 }
8550 
8551 /*
8552  * SYSFS fan layout: hwmon compatible (device)
8553  *
8554  * pwm*_enable:
8555  * 	0: "disengaged" mode
8556  * 	1: manual mode
8557  * 	2: native EC "auto" mode (recommended, hardware default)
8558  *
8559  * pwm*: set speed in manual mode, ignored otherwise.
8560  * 	0 is level 0; 255 is level 7. Intermediate points done with linear
8561  * 	interpolation.
8562  *
8563  * fan*_input: tachometer reading, RPM
8564  *
8565  *
8566  * SYSFS fan layout: extensions
8567  *
8568  * fan_watchdog (driver):
8569  * 	fan watchdog interval in seconds, 0 disables (default), max 120
8570  */
8571 
8572 /* sysfs fan pwm1_enable ----------------------------------------------- */
8573 static ssize_t fan_pwm1_enable_show(struct device *dev,
8574 				    struct device_attribute *attr,
8575 				    char *buf)
8576 {
8577 	int res, mode;
8578 	u8 status;
8579 
8580 	res = fan_get_status_safe(&status);
8581 	if (res)
8582 		return res;
8583 
8584 	if (status & TP_EC_FAN_FULLSPEED) {
8585 		mode = 0;
8586 	} else if (status & TP_EC_FAN_AUTO) {
8587 		mode = 2;
8588 	} else
8589 		mode = 1;
8590 
8591 	return snprintf(buf, PAGE_SIZE, "%d\n", mode);
8592 }
8593 
8594 static ssize_t fan_pwm1_enable_store(struct device *dev,
8595 				     struct device_attribute *attr,
8596 				     const char *buf, size_t count)
8597 {
8598 	unsigned long t;
8599 	int res, level;
8600 
8601 	if (parse_strtoul(buf, 2, &t))
8602 		return -EINVAL;
8603 
8604 	tpacpi_disclose_usertask("hwmon pwm1_enable",
8605 			"set fan mode to %lu\n", t);
8606 
8607 	switch (t) {
8608 	case 0:
8609 		level = TP_EC_FAN_FULLSPEED;
8610 		break;
8611 	case 1:
8612 		level = TPACPI_FAN_LAST_LEVEL;
8613 		break;
8614 	case 2:
8615 		level = TP_EC_FAN_AUTO;
8616 		break;
8617 	case 3:
8618 		/* reserved for software-controlled auto mode */
8619 		return -ENOSYS;
8620 	default:
8621 		return -EINVAL;
8622 	}
8623 
8624 	res = fan_set_level_safe(level);
8625 	if (res == -ENXIO)
8626 		return -EINVAL;
8627 	else if (res < 0)
8628 		return res;
8629 
8630 	fan_watchdog_reset();
8631 
8632 	return count;
8633 }
8634 
8635 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8636 		   fan_pwm1_enable_show, fan_pwm1_enable_store);
8637 
8638 /* sysfs fan pwm1 ------------------------------------------------------ */
8639 static ssize_t fan_pwm1_show(struct device *dev,
8640 			     struct device_attribute *attr,
8641 			     char *buf)
8642 {
8643 	int res;
8644 	u8 status;
8645 
8646 	res = fan_get_status_safe(&status);
8647 	if (res)
8648 		return res;
8649 
8650 	if ((status &
8651 	     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8652 		status = fan_control_desired_level;
8653 
8654 	if (status > 7)
8655 		status = 7;
8656 
8657 	return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
8658 }
8659 
8660 static ssize_t fan_pwm1_store(struct device *dev,
8661 			      struct device_attribute *attr,
8662 			      const char *buf, size_t count)
8663 {
8664 	unsigned long s;
8665 	int rc;
8666 	u8 status, newlevel;
8667 
8668 	if (parse_strtoul(buf, 255, &s))
8669 		return -EINVAL;
8670 
8671 	tpacpi_disclose_usertask("hwmon pwm1",
8672 			"set fan speed to %lu\n", s);
8673 
8674 	/* scale down from 0-255 to 0-7 */
8675 	newlevel = (s >> 5) & 0x07;
8676 
8677 	if (mutex_lock_killable(&fan_mutex))
8678 		return -ERESTARTSYS;
8679 
8680 	rc = fan_get_status(&status);
8681 	if (!rc && (status &
8682 		    (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8683 		rc = fan_set_level(newlevel);
8684 		if (rc == -ENXIO)
8685 			rc = -EINVAL;
8686 		else if (!rc) {
8687 			fan_update_desired_level(newlevel);
8688 			fan_watchdog_reset();
8689 		}
8690 	}
8691 
8692 	mutex_unlock(&fan_mutex);
8693 	return (rc) ? rc : count;
8694 }
8695 
8696 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
8697 
8698 /* sysfs fan fan1_input ------------------------------------------------ */
8699 static ssize_t fan_fan1_input_show(struct device *dev,
8700 			   struct device_attribute *attr,
8701 			   char *buf)
8702 {
8703 	int res;
8704 	unsigned int speed;
8705 
8706 	res = fan_get_speed(&speed);
8707 	if (res < 0)
8708 		return res;
8709 
8710 	return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8711 }
8712 
8713 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
8714 
8715 /* sysfs fan fan2_input ------------------------------------------------ */
8716 static ssize_t fan_fan2_input_show(struct device *dev,
8717 			   struct device_attribute *attr,
8718 			   char *buf)
8719 {
8720 	int res;
8721 	unsigned int speed;
8722 
8723 	res = fan2_get_speed(&speed);
8724 	if (res < 0)
8725 		return res;
8726 
8727 	return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8728 }
8729 
8730 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
8731 
8732 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
8733 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf)
8734 {
8735 	return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
8736 }
8737 
8738 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf,
8739 				  size_t count)
8740 {
8741 	unsigned long t;
8742 
8743 	if (parse_strtoul(buf, 120, &t))
8744 		return -EINVAL;
8745 
8746 	if (!fan_control_allowed)
8747 		return -EPERM;
8748 
8749 	fan_watchdog_maxinterval = t;
8750 	fan_watchdog_reset();
8751 
8752 	tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8753 
8754 	return count;
8755 }
8756 static DRIVER_ATTR_RW(fan_watchdog);
8757 
8758 /* --------------------------------------------------------------------- */
8759 static struct attribute *fan_attributes[] = {
8760 	&dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr,
8761 	&dev_attr_fan1_input.attr,
8762 	NULL, /* for fan2_input */
8763 	NULL
8764 };
8765 
8766 static const struct attribute_group fan_attr_group = {
8767 	.attrs = fan_attributes,
8768 };
8769 
8770 #define TPACPI_FAN_Q1	0x0001		/* Unitialized HFSP */
8771 #define TPACPI_FAN_2FAN	0x0002		/* EC 0x31 bit 0 selects fan2 */
8772 #define TPACPI_FAN_2CTL	0x0004		/* selects fan2 control */
8773 
8774 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8775 	TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1),
8776 	TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1),
8777 	TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1),
8778 	TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1),
8779 	TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN),
8780 	TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN),
8781 	TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL),	/* P70 */
8782 	TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL),	/* P50 */
8783 	TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL),	/* P71 */
8784 	TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL),	/* P51 */
8785 	TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL),	/* P52 / P72 */
8786 	TPACPI_Q_LNV3('N', '2', 'N', TPACPI_FAN_2CTL),	/* P53 / P73 */
8787 	TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL),	/* P1 / X1 Extreme (1st gen) */
8788 	TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL),	/* P1 / X1 Extreme (2nd gen) */
8789 	TPACPI_Q_LNV3('N', '2', 'V', TPACPI_FAN_2CTL),	/* P1 / X1 Extreme (3nd gen) */
8790 	TPACPI_Q_LNV3('N', '3', '0', TPACPI_FAN_2CTL),	/* P15 (1st gen) / P15v (1st gen) */
8791 };
8792 
8793 static int __init fan_init(struct ibm_init_struct *iibm)
8794 {
8795 	int rc;
8796 	unsigned long quirks;
8797 
8798 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8799 			"initializing fan subdriver\n");
8800 
8801 	mutex_init(&fan_mutex);
8802 	fan_status_access_mode = TPACPI_FAN_NONE;
8803 	fan_control_access_mode = TPACPI_FAN_WR_NONE;
8804 	fan_control_commands = 0;
8805 	fan_watchdog_maxinterval = 0;
8806 	tp_features.fan_ctrl_status_undef = 0;
8807 	tp_features.second_fan = 0;
8808 	tp_features.second_fan_ctl = 0;
8809 	fan_control_desired_level = 7;
8810 
8811 	if (tpacpi_is_ibm()) {
8812 		TPACPI_ACPIHANDLE_INIT(fans);
8813 		TPACPI_ACPIHANDLE_INIT(gfan);
8814 		TPACPI_ACPIHANDLE_INIT(sfan);
8815 	}
8816 
8817 	quirks = tpacpi_check_quirks(fan_quirk_table,
8818 				     ARRAY_SIZE(fan_quirk_table));
8819 
8820 	if (gfan_handle) {
8821 		/* 570, 600e/x, 770e, 770x */
8822 		fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8823 	} else {
8824 		/* all other ThinkPads: note that even old-style
8825 		 * ThinkPad ECs supports the fan control register */
8826 		if (likely(acpi_ec_read(fan_status_offset,
8827 					&fan_control_initial_status))) {
8828 			fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8829 			if (quirks & TPACPI_FAN_Q1)
8830 				fan_quirk1_setup();
8831 			if (quirks & TPACPI_FAN_2FAN) {
8832 				tp_features.second_fan = 1;
8833 				pr_info("secondary fan support enabled\n");
8834 			}
8835 			if (quirks & TPACPI_FAN_2CTL) {
8836 				tp_features.second_fan = 1;
8837 				tp_features.second_fan_ctl = 1;
8838 				pr_info("secondary fan control enabled\n");
8839 			}
8840 		} else {
8841 			pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
8842 			return 1;
8843 		}
8844 	}
8845 
8846 	if (sfan_handle) {
8847 		/* 570, 770x-JL */
8848 		fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8849 		fan_control_commands |=
8850 		    TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8851 	} else {
8852 		if (!gfan_handle) {
8853 			/* gfan without sfan means no fan control */
8854 			/* all other models implement TP EC 0x2f control */
8855 
8856 			if (fans_handle) {
8857 				/* X31, X40, X41 */
8858 				fan_control_access_mode =
8859 				    TPACPI_FAN_WR_ACPI_FANS;
8860 				fan_control_commands |=
8861 				    TPACPI_FAN_CMD_SPEED |
8862 				    TPACPI_FAN_CMD_LEVEL |
8863 				    TPACPI_FAN_CMD_ENABLE;
8864 			} else {
8865 				fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8866 				fan_control_commands |=
8867 				    TPACPI_FAN_CMD_LEVEL |
8868 				    TPACPI_FAN_CMD_ENABLE;
8869 			}
8870 		}
8871 	}
8872 
8873 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8874 		"fan is %s, modes %d, %d\n",
8875 		str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8876 		  fan_control_access_mode != TPACPI_FAN_WR_NONE),
8877 		fan_status_access_mode, fan_control_access_mode);
8878 
8879 	/* fan control master switch */
8880 	if (!fan_control_allowed) {
8881 		fan_control_access_mode = TPACPI_FAN_WR_NONE;
8882 		fan_control_commands = 0;
8883 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8884 			   "fan control features disabled by parameter\n");
8885 	}
8886 
8887 	/* update fan_control_desired_level */
8888 	if (fan_status_access_mode != TPACPI_FAN_NONE)
8889 		fan_get_status_safe(NULL);
8890 
8891 	if (fan_status_access_mode != TPACPI_FAN_NONE ||
8892 	    fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8893 		if (tp_features.second_fan) {
8894 			/* attach second fan tachometer */
8895 			fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8896 					&dev_attr_fan2_input.attr;
8897 		}
8898 		rc = sysfs_create_group(&tpacpi_hwmon->kobj,
8899 					 &fan_attr_group);
8900 		if (rc < 0)
8901 			return rc;
8902 
8903 		rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8904 					&driver_attr_fan_watchdog);
8905 		if (rc < 0) {
8906 			sysfs_remove_group(&tpacpi_hwmon->kobj,
8907 					&fan_attr_group);
8908 			return rc;
8909 		}
8910 		return 0;
8911 	} else
8912 		return 1;
8913 }
8914 
8915 static void fan_exit(void)
8916 {
8917 	vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8918 		    "cancelling any pending fan watchdog tasks\n");
8919 
8920 	/* FIXME: can we really do this unconditionally? */
8921 	sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group);
8922 	driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8923 			   &driver_attr_fan_watchdog);
8924 
8925 	cancel_delayed_work(&fan_watchdog_task);
8926 	flush_workqueue(tpacpi_wq);
8927 }
8928 
8929 static void fan_suspend(void)
8930 {
8931 	int rc;
8932 
8933 	if (!fan_control_allowed)
8934 		return;
8935 
8936 	/* Store fan status in cache */
8937 	fan_control_resume_level = 0;
8938 	rc = fan_get_status_safe(&fan_control_resume_level);
8939 	if (rc < 0)
8940 		pr_notice("failed to read fan level for later restore during resume: %d\n",
8941 			  rc);
8942 
8943 	/* if it is undefined, don't attempt to restore it.
8944 	 * KEEP THIS LAST */
8945 	if (tp_features.fan_ctrl_status_undef)
8946 		fan_control_resume_level = 0;
8947 }
8948 
8949 static void fan_resume(void)
8950 {
8951 	u8 current_level = 7;
8952 	bool do_set = false;
8953 	int rc;
8954 
8955 	/* DSDT *always* updates status on resume */
8956 	tp_features.fan_ctrl_status_undef = 0;
8957 
8958 	if (!fan_control_allowed ||
8959 	    !fan_control_resume_level ||
8960 	    (fan_get_status_safe(&current_level) < 0))
8961 		return;
8962 
8963 	switch (fan_control_access_mode) {
8964 	case TPACPI_FAN_WR_ACPI_SFAN:
8965 		/* never decrease fan level */
8966 		do_set = (fan_control_resume_level > current_level);
8967 		break;
8968 	case TPACPI_FAN_WR_ACPI_FANS:
8969 	case TPACPI_FAN_WR_TPEC:
8970 		/* never decrease fan level, scale is:
8971 		 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8972 		 *
8973 		 * We expect the firmware to set either 7 or AUTO, but we
8974 		 * handle FULLSPEED out of paranoia.
8975 		 *
8976 		 * So, we can safely only restore FULLSPEED or 7, anything
8977 		 * else could slow the fan.  Restoring AUTO is useless, at
8978 		 * best that's exactly what the DSDT already set (it is the
8979 		 * slower it uses).
8980 		 *
8981 		 * Always keep in mind that the DSDT *will* have set the
8982 		 * fans to what the vendor supposes is the best level.  We
8983 		 * muck with it only to speed the fan up.
8984 		 */
8985 		if (fan_control_resume_level != 7 &&
8986 		    !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8987 			return;
8988 		else
8989 			do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8990 				 (current_level != fan_control_resume_level);
8991 		break;
8992 	default:
8993 		return;
8994 	}
8995 	if (do_set) {
8996 		pr_notice("restoring fan level to 0x%02x\n",
8997 			  fan_control_resume_level);
8998 		rc = fan_set_level_safe(fan_control_resume_level);
8999 		if (rc < 0)
9000 			pr_notice("failed to restore fan level: %d\n", rc);
9001 	}
9002 }
9003 
9004 static int fan_read(struct seq_file *m)
9005 {
9006 	int rc;
9007 	u8 status;
9008 	unsigned int speed = 0;
9009 
9010 	switch (fan_status_access_mode) {
9011 	case TPACPI_FAN_RD_ACPI_GFAN:
9012 		/* 570, 600e/x, 770e, 770x */
9013 		rc = fan_get_status_safe(&status);
9014 		if (rc < 0)
9015 			return rc;
9016 
9017 		seq_printf(m, "status:\t\t%s\n"
9018 			       "level:\t\t%d\n",
9019 			       (status != 0) ? "enabled" : "disabled", status);
9020 		break;
9021 
9022 	case TPACPI_FAN_RD_TPEC:
9023 		/* all except 570, 600e/x, 770e, 770x */
9024 		rc = fan_get_status_safe(&status);
9025 		if (rc < 0)
9026 			return rc;
9027 
9028 		seq_printf(m, "status:\t\t%s\n",
9029 			       (status != 0) ? "enabled" : "disabled");
9030 
9031 		rc = fan_get_speed(&speed);
9032 		if (rc < 0)
9033 			return rc;
9034 
9035 		seq_printf(m, "speed:\t\t%d\n", speed);
9036 
9037 		if (status & TP_EC_FAN_FULLSPEED)
9038 			/* Disengaged mode takes precedence */
9039 			seq_printf(m, "level:\t\tdisengaged\n");
9040 		else if (status & TP_EC_FAN_AUTO)
9041 			seq_printf(m, "level:\t\tauto\n");
9042 		else
9043 			seq_printf(m, "level:\t\t%d\n", status);
9044 		break;
9045 
9046 	case TPACPI_FAN_NONE:
9047 	default:
9048 		seq_printf(m, "status:\t\tnot supported\n");
9049 	}
9050 
9051 	if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
9052 		seq_printf(m, "commands:\tlevel <level>");
9053 
9054 		switch (fan_control_access_mode) {
9055 		case TPACPI_FAN_WR_ACPI_SFAN:
9056 			seq_printf(m, " (<level> is 0-7)\n");
9057 			break;
9058 
9059 		default:
9060 			seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n");
9061 			break;
9062 		}
9063 	}
9064 
9065 	if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
9066 		seq_printf(m, "commands:\tenable, disable\n"
9067 			       "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n");
9068 
9069 	if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
9070 		seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n");
9071 
9072 	return 0;
9073 }
9074 
9075 static int fan_write_cmd_level(const char *cmd, int *rc)
9076 {
9077 	int level;
9078 
9079 	if (strlencmp(cmd, "level auto") == 0)
9080 		level = TP_EC_FAN_AUTO;
9081 	else if ((strlencmp(cmd, "level disengaged") == 0) |
9082 			(strlencmp(cmd, "level full-speed") == 0))
9083 		level = TP_EC_FAN_FULLSPEED;
9084 	else if (sscanf(cmd, "level %d", &level) != 1)
9085 		return 0;
9086 
9087 	*rc = fan_set_level_safe(level);
9088 	if (*rc == -ENXIO)
9089 		pr_err("level command accepted for unsupported access mode %d\n",
9090 		       fan_control_access_mode);
9091 	else if (!*rc)
9092 		tpacpi_disclose_usertask("procfs fan",
9093 			"set level to %d\n", level);
9094 
9095 	return 1;
9096 }
9097 
9098 static int fan_write_cmd_enable(const char *cmd, int *rc)
9099 {
9100 	if (strlencmp(cmd, "enable") != 0)
9101 		return 0;
9102 
9103 	*rc = fan_set_enable();
9104 	if (*rc == -ENXIO)
9105 		pr_err("enable command accepted for unsupported access mode %d\n",
9106 		       fan_control_access_mode);
9107 	else if (!*rc)
9108 		tpacpi_disclose_usertask("procfs fan", "enable\n");
9109 
9110 	return 1;
9111 }
9112 
9113 static int fan_write_cmd_disable(const char *cmd, int *rc)
9114 {
9115 	if (strlencmp(cmd, "disable") != 0)
9116 		return 0;
9117 
9118 	*rc = fan_set_disable();
9119 	if (*rc == -ENXIO)
9120 		pr_err("disable command accepted for unsupported access mode %d\n",
9121 		       fan_control_access_mode);
9122 	else if (!*rc)
9123 		tpacpi_disclose_usertask("procfs fan", "disable\n");
9124 
9125 	return 1;
9126 }
9127 
9128 static int fan_write_cmd_speed(const char *cmd, int *rc)
9129 {
9130 	int speed;
9131 
9132 	/* TODO:
9133 	 * Support speed <low> <medium> <high> ? */
9134 
9135 	if (sscanf(cmd, "speed %d", &speed) != 1)
9136 		return 0;
9137 
9138 	*rc = fan_set_speed(speed);
9139 	if (*rc == -ENXIO)
9140 		pr_err("speed command accepted for unsupported access mode %d\n",
9141 		       fan_control_access_mode);
9142 	else if (!*rc)
9143 		tpacpi_disclose_usertask("procfs fan",
9144 			"set speed to %d\n", speed);
9145 
9146 	return 1;
9147 }
9148 
9149 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
9150 {
9151 	int interval;
9152 
9153 	if (sscanf(cmd, "watchdog %d", &interval) != 1)
9154 		return 0;
9155 
9156 	if (interval < 0 || interval > 120)
9157 		*rc = -EINVAL;
9158 	else {
9159 		fan_watchdog_maxinterval = interval;
9160 		tpacpi_disclose_usertask("procfs fan",
9161 			"set watchdog timer to %d\n",
9162 			interval);
9163 	}
9164 
9165 	return 1;
9166 }
9167 
9168 static int fan_write(char *buf)
9169 {
9170 	char *cmd;
9171 	int rc = 0;
9172 
9173 	while (!rc && (cmd = strsep(&buf, ","))) {
9174 		if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
9175 		      fan_write_cmd_level(cmd, &rc)) &&
9176 		    !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
9177 		      (fan_write_cmd_enable(cmd, &rc) ||
9178 		       fan_write_cmd_disable(cmd, &rc) ||
9179 		       fan_write_cmd_watchdog(cmd, &rc))) &&
9180 		    !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
9181 		      fan_write_cmd_speed(cmd, &rc))
9182 		    )
9183 			rc = -EINVAL;
9184 		else if (!rc)
9185 			fan_watchdog_reset();
9186 	}
9187 
9188 	return rc;
9189 }
9190 
9191 static struct ibm_struct fan_driver_data = {
9192 	.name = "fan",
9193 	.read = fan_read,
9194 	.write = fan_write,
9195 	.exit = fan_exit,
9196 	.suspend = fan_suspend,
9197 	.resume = fan_resume,
9198 };
9199 
9200 /*************************************************************************
9201  * Mute LED subdriver
9202  */
9203 
9204 #define TPACPI_LED_MAX		2
9205 
9206 struct tp_led_table {
9207 	acpi_string name;
9208 	int on_value;
9209 	int off_value;
9210 	int state;
9211 };
9212 
9213 static struct tp_led_table led_tables[TPACPI_LED_MAX] = {
9214 	[LED_AUDIO_MUTE] = {
9215 		.name = "SSMS",
9216 		.on_value = 1,
9217 		.off_value = 0,
9218 	},
9219 	[LED_AUDIO_MICMUTE] = {
9220 		.name = "MMTS",
9221 		.on_value = 2,
9222 		.off_value = 0,
9223 	},
9224 };
9225 
9226 static int mute_led_on_off(struct tp_led_table *t, bool state)
9227 {
9228 	acpi_handle temp;
9229 	int output;
9230 
9231 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9232 		pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
9233 		return -EIO;
9234 	}
9235 
9236 	if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
9237 			state ? t->on_value : t->off_value))
9238 		return -EIO;
9239 
9240 	t->state = state;
9241 	return state;
9242 }
9243 
9244 static int tpacpi_led_set(int whichled, bool on)
9245 {
9246 	struct tp_led_table *t;
9247 
9248 	t = &led_tables[whichled];
9249 	if (t->state < 0 || t->state == on)
9250 		return t->state;
9251 	return mute_led_on_off(t, on);
9252 }
9253 
9254 static int tpacpi_led_mute_set(struct led_classdev *led_cdev,
9255 			       enum led_brightness brightness)
9256 {
9257 	return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF);
9258 }
9259 
9260 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev,
9261 				  enum led_brightness brightness)
9262 {
9263 	return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF);
9264 }
9265 
9266 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = {
9267 	[LED_AUDIO_MUTE] = {
9268 		.name		= "platform::mute",
9269 		.max_brightness = 1,
9270 		.brightness_set_blocking = tpacpi_led_mute_set,
9271 		.default_trigger = "audio-mute",
9272 	},
9273 	[LED_AUDIO_MICMUTE] = {
9274 		.name		= "platform::micmute",
9275 		.max_brightness = 1,
9276 		.brightness_set_blocking = tpacpi_led_micmute_set,
9277 		.default_trigger = "audio-micmute",
9278 	},
9279 };
9280 
9281 static int mute_led_init(struct ibm_init_struct *iibm)
9282 {
9283 	acpi_handle temp;
9284 	int i, err;
9285 
9286 	for (i = 0; i < TPACPI_LED_MAX; i++) {
9287 		struct tp_led_table *t = &led_tables[i];
9288 		if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9289 			t->state = -ENODEV;
9290 			continue;
9291 		}
9292 
9293 		mute_led_cdev[i].brightness = ledtrig_audio_get(i);
9294 		err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]);
9295 		if (err < 0) {
9296 			while (i--)
9297 				led_classdev_unregister(&mute_led_cdev[i]);
9298 			return err;
9299 		}
9300 	}
9301 	return 0;
9302 }
9303 
9304 static void mute_led_exit(void)
9305 {
9306 	int i;
9307 
9308 	for (i = 0; i < TPACPI_LED_MAX; i++) {
9309 		led_classdev_unregister(&mute_led_cdev[i]);
9310 		tpacpi_led_set(i, false);
9311 	}
9312 }
9313 
9314 static void mute_led_resume(void)
9315 {
9316 	int i;
9317 
9318 	for (i = 0; i < TPACPI_LED_MAX; i++) {
9319 		struct tp_led_table *t = &led_tables[i];
9320 		if (t->state >= 0)
9321 			mute_led_on_off(t, t->state);
9322 	}
9323 }
9324 
9325 static struct ibm_struct mute_led_driver_data = {
9326 	.name = "mute_led",
9327 	.exit = mute_led_exit,
9328 	.resume = mute_led_resume,
9329 };
9330 
9331 /*
9332  * Battery Wear Control Driver
9333  * Contact: Ognjen Galic <smclt30p@gmail.com>
9334  */
9335 
9336 /* Metadata */
9337 
9338 #define GET_START	"BCTG"
9339 #define SET_START	"BCCS"
9340 #define GET_STOP	"BCSG"
9341 #define SET_STOP	"BCSS"
9342 
9343 enum {
9344 	BAT_ANY = 0,
9345 	BAT_PRIMARY = 1,
9346 	BAT_SECONDARY = 2
9347 };
9348 
9349 enum {
9350 	/* Error condition bit */
9351 	METHOD_ERR = BIT(31),
9352 };
9353 
9354 enum {
9355 	/* This is used in the get/set helpers */
9356 	THRESHOLD_START,
9357 	THRESHOLD_STOP,
9358 };
9359 
9360 struct tpacpi_battery_data {
9361 	int charge_start;
9362 	int start_support;
9363 	int charge_stop;
9364 	int stop_support;
9365 };
9366 
9367 struct tpacpi_battery_driver_data {
9368 	struct tpacpi_battery_data batteries[3];
9369 	int individual_addressing;
9370 };
9371 
9372 static struct tpacpi_battery_driver_data battery_info;
9373 
9374 /* ACPI helpers/functions/probes */
9375 
9376 /**
9377  * This evaluates a ACPI method call specific to the battery
9378  * ACPI extension. The specifics are that an error is marked
9379  * in the 32rd bit of the response, so we just check that here.
9380  */
9381 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param)
9382 {
9383 	int response;
9384 
9385 	if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) {
9386 		acpi_handle_err(hkey_handle, "%s: evaluate failed", method);
9387 		return AE_ERROR;
9388 	}
9389 	if (response & METHOD_ERR) {
9390 		acpi_handle_err(hkey_handle,
9391 				"%s evaluated but flagged as error", method);
9392 		return AE_ERROR;
9393 	}
9394 	*ret = response;
9395 	return AE_OK;
9396 }
9397 
9398 static int tpacpi_battery_get(int what, int battery, int *ret)
9399 {
9400 	switch (what) {
9401 	case THRESHOLD_START:
9402 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery))
9403 			return -ENODEV;
9404 
9405 		/* The value is in the low 8 bits of the response */
9406 		*ret = *ret & 0xFF;
9407 		return 0;
9408 	case THRESHOLD_STOP:
9409 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery))
9410 			return -ENODEV;
9411 		/* Value is in lower 8 bits */
9412 		*ret = *ret & 0xFF;
9413 		/*
9414 		 * On the stop value, if we return 0 that
9415 		 * does not make any sense. 0 means Default, which
9416 		 * means that charging stops at 100%, so we return
9417 		 * that.
9418 		 */
9419 		if (*ret == 0)
9420 			*ret = 100;
9421 		return 0;
9422 	default:
9423 		pr_crit("wrong parameter: %d", what);
9424 		return -EINVAL;
9425 	}
9426 }
9427 
9428 static int tpacpi_battery_set(int what, int battery, int value)
9429 {
9430 	int param, ret;
9431 	/* The first 8 bits are the value of the threshold */
9432 	param = value;
9433 	/* The battery ID is in bits 8-9, 2 bits */
9434 	param |= battery << 8;
9435 
9436 	switch (what) {
9437 	case THRESHOLD_START:
9438 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) {
9439 			pr_err("failed to set charge threshold on battery %d",
9440 					battery);
9441 			return -ENODEV;
9442 		}
9443 		return 0;
9444 	case THRESHOLD_STOP:
9445 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) {
9446 			pr_err("failed to set stop threshold: %d", battery);
9447 			return -ENODEV;
9448 		}
9449 		return 0;
9450 	default:
9451 		pr_crit("wrong parameter: %d", what);
9452 		return -EINVAL;
9453 	}
9454 }
9455 
9456 static int tpacpi_battery_probe(int battery)
9457 {
9458 	int ret = 0;
9459 
9460 	memset(&battery_info.batteries[battery], 0,
9461 		sizeof(battery_info.batteries[battery]));
9462 
9463 	/*
9464 	 * 1) Get the current start threshold
9465 	 * 2) Check for support
9466 	 * 3) Get the current stop threshold
9467 	 * 4) Check for support
9468 	 */
9469 	if (acpi_has_method(hkey_handle, GET_START)) {
9470 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
9471 			pr_err("Error probing battery %d\n", battery);
9472 			return -ENODEV;
9473 		}
9474 		/* Individual addressing is in bit 9 */
9475 		if (ret & BIT(9))
9476 			battery_info.individual_addressing = true;
9477 		/* Support is marked in bit 8 */
9478 		if (ret & BIT(8))
9479 			battery_info.batteries[battery].start_support = 1;
9480 		else
9481 			return -ENODEV;
9482 		if (tpacpi_battery_get(THRESHOLD_START, battery,
9483 			&battery_info.batteries[battery].charge_start)) {
9484 			pr_err("Error probing battery %d\n", battery);
9485 			return -ENODEV;
9486 		}
9487 	}
9488 	if (acpi_has_method(hkey_handle, GET_STOP)) {
9489 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) {
9490 			pr_err("Error probing battery stop; %d\n", battery);
9491 			return -ENODEV;
9492 		}
9493 		/* Support is marked in bit 8 */
9494 		if (ret & BIT(8))
9495 			battery_info.batteries[battery].stop_support = 1;
9496 		else
9497 			return -ENODEV;
9498 		if (tpacpi_battery_get(THRESHOLD_STOP, battery,
9499 			&battery_info.batteries[battery].charge_stop)) {
9500 			pr_err("Error probing battery stop: %d\n", battery);
9501 			return -ENODEV;
9502 		}
9503 	}
9504 	pr_info("battery %d registered (start %d, stop %d)",
9505 			battery,
9506 			battery_info.batteries[battery].charge_start,
9507 			battery_info.batteries[battery].charge_stop);
9508 
9509 	return 0;
9510 }
9511 
9512 /* General helper functions */
9513 
9514 static int tpacpi_battery_get_id(const char *battery_name)
9515 {
9516 
9517 	if (strcmp(battery_name, "BAT0") == 0 ||
9518 	    tp_features.battery_force_primary)
9519 		return BAT_PRIMARY;
9520 	if (strcmp(battery_name, "BAT1") == 0)
9521 		return BAT_SECONDARY;
9522 	/*
9523 	 * If for some reason the battery is not BAT0 nor is it
9524 	 * BAT1, we will assume it's the default, first battery,
9525 	 * AKA primary.
9526 	 */
9527 	pr_warn("unknown battery %s, assuming primary", battery_name);
9528 	return BAT_PRIMARY;
9529 }
9530 
9531 /* sysfs interface */
9532 
9533 static ssize_t tpacpi_battery_store(int what,
9534 				    struct device *dev,
9535 				    const char *buf, size_t count)
9536 {
9537 	struct power_supply *supply = to_power_supply(dev);
9538 	unsigned long value;
9539 	int battery, rval;
9540 	/*
9541 	 * Some systems have support for more than
9542 	 * one battery. If that is the case,
9543 	 * tpacpi_battery_probe marked that addressing
9544 	 * them individually is supported, so we do that
9545 	 * based on the device struct.
9546 	 *
9547 	 * On systems that are not supported, we assume
9548 	 * the primary as most of the ACPI calls fail
9549 	 * with "Any Battery" as the parameter.
9550 	 */
9551 	if (battery_info.individual_addressing)
9552 		/* BAT_PRIMARY or BAT_SECONDARY */
9553 		battery = tpacpi_battery_get_id(supply->desc->name);
9554 	else
9555 		battery = BAT_PRIMARY;
9556 
9557 	rval = kstrtoul(buf, 10, &value);
9558 	if (rval)
9559 		return rval;
9560 
9561 	switch (what) {
9562 	case THRESHOLD_START:
9563 		if (!battery_info.batteries[battery].start_support)
9564 			return -ENODEV;
9565 		/* valid values are [0, 99] */
9566 		if (value > 99)
9567 			return -EINVAL;
9568 		if (value > battery_info.batteries[battery].charge_stop)
9569 			return -EINVAL;
9570 		if (tpacpi_battery_set(THRESHOLD_START, battery, value))
9571 			return -ENODEV;
9572 		battery_info.batteries[battery].charge_start = value;
9573 		return count;
9574 
9575 	case THRESHOLD_STOP:
9576 		if (!battery_info.batteries[battery].stop_support)
9577 			return -ENODEV;
9578 		/* valid values are [1, 100] */
9579 		if (value < 1 || value > 100)
9580 			return -EINVAL;
9581 		if (value < battery_info.batteries[battery].charge_start)
9582 			return -EINVAL;
9583 		battery_info.batteries[battery].charge_stop = value;
9584 		/*
9585 		 * When 100 is passed to stop, we need to flip
9586 		 * it to 0 as that the EC understands that as
9587 		 * "Default", which will charge to 100%
9588 		 */
9589 		if (value == 100)
9590 			value = 0;
9591 		if (tpacpi_battery_set(THRESHOLD_STOP, battery, value))
9592 			return -EINVAL;
9593 		return count;
9594 	default:
9595 		pr_crit("Wrong parameter: %d", what);
9596 		return -EINVAL;
9597 	}
9598 	return count;
9599 }
9600 
9601 static ssize_t tpacpi_battery_show(int what,
9602 				   struct device *dev,
9603 				   char *buf)
9604 {
9605 	struct power_supply *supply = to_power_supply(dev);
9606 	int ret, battery;
9607 	/*
9608 	 * Some systems have support for more than
9609 	 * one battery. If that is the case,
9610 	 * tpacpi_battery_probe marked that addressing
9611 	 * them individually is supported, so we;
9612 	 * based on the device struct.
9613 	 *
9614 	 * On systems that are not supported, we assume
9615 	 * the primary as most of the ACPI calls fail
9616 	 * with "Any Battery" as the parameter.
9617 	 */
9618 	if (battery_info.individual_addressing)
9619 		/* BAT_PRIMARY or BAT_SECONDARY */
9620 		battery = tpacpi_battery_get_id(supply->desc->name);
9621 	else
9622 		battery = BAT_PRIMARY;
9623 	if (tpacpi_battery_get(what, battery, &ret))
9624 		return -ENODEV;
9625 	return sprintf(buf, "%d\n", ret);
9626 }
9627 
9628 static ssize_t charge_control_start_threshold_show(struct device *device,
9629 				struct device_attribute *attr,
9630 				char *buf)
9631 {
9632 	return tpacpi_battery_show(THRESHOLD_START, device, buf);
9633 }
9634 
9635 static ssize_t charge_control_end_threshold_show(struct device *device,
9636 				struct device_attribute *attr,
9637 				char *buf)
9638 {
9639 	return tpacpi_battery_show(THRESHOLD_STOP, device, buf);
9640 }
9641 
9642 static ssize_t charge_control_start_threshold_store(struct device *dev,
9643 				struct device_attribute *attr,
9644 				const char *buf, size_t count)
9645 {
9646 	return tpacpi_battery_store(THRESHOLD_START, dev, buf, count);
9647 }
9648 
9649 static ssize_t charge_control_end_threshold_store(struct device *dev,
9650 				struct device_attribute *attr,
9651 				const char *buf, size_t count)
9652 {
9653 	return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count);
9654 }
9655 
9656 static DEVICE_ATTR_RW(charge_control_start_threshold);
9657 static DEVICE_ATTR_RW(charge_control_end_threshold);
9658 static struct device_attribute dev_attr_charge_start_threshold = __ATTR(
9659 	charge_start_threshold,
9660 	0644,
9661 	charge_control_start_threshold_show,
9662 	charge_control_start_threshold_store
9663 );
9664 static struct device_attribute dev_attr_charge_stop_threshold = __ATTR(
9665 	charge_stop_threshold,
9666 	0644,
9667 	charge_control_end_threshold_show,
9668 	charge_control_end_threshold_store
9669 );
9670 
9671 static struct attribute *tpacpi_battery_attrs[] = {
9672 	&dev_attr_charge_control_start_threshold.attr,
9673 	&dev_attr_charge_control_end_threshold.attr,
9674 	&dev_attr_charge_start_threshold.attr,
9675 	&dev_attr_charge_stop_threshold.attr,
9676 	NULL,
9677 };
9678 
9679 ATTRIBUTE_GROUPS(tpacpi_battery);
9680 
9681 /* ACPI battery hooking */
9682 
9683 static int tpacpi_battery_add(struct power_supply *battery)
9684 {
9685 	int batteryid = tpacpi_battery_get_id(battery->desc->name);
9686 
9687 	if (tpacpi_battery_probe(batteryid))
9688 		return -ENODEV;
9689 	if (device_add_groups(&battery->dev, tpacpi_battery_groups))
9690 		return -ENODEV;
9691 	return 0;
9692 }
9693 
9694 static int tpacpi_battery_remove(struct power_supply *battery)
9695 {
9696 	device_remove_groups(&battery->dev, tpacpi_battery_groups);
9697 	return 0;
9698 }
9699 
9700 static struct acpi_battery_hook battery_hook = {
9701 	.add_battery = tpacpi_battery_add,
9702 	.remove_battery = tpacpi_battery_remove,
9703 	.name = "ThinkPad Battery Extension",
9704 };
9705 
9706 /* Subdriver init/exit */
9707 
9708 static const struct tpacpi_quirk battery_quirk_table[] __initconst = {
9709 	/*
9710 	 * Individual addressing is broken on models that expose the
9711 	 * primary battery as BAT1.
9712 	 */
9713 	TPACPI_Q_LNV('J', '7', true),       /* B5400 */
9714 	TPACPI_Q_LNV('J', 'I', true),       /* Thinkpad 11e */
9715 	TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */
9716 	TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */
9717 	TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */
9718 	TPACPI_Q_LNV3('R', '0', 'K', true), /* Thinkpad 11e gen 4 celeron BIOS */
9719 };
9720 
9721 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm)
9722 {
9723 	memset(&battery_info, 0, sizeof(battery_info));
9724 
9725 	tp_features.battery_force_primary = tpacpi_check_quirks(
9726 					battery_quirk_table,
9727 					ARRAY_SIZE(battery_quirk_table));
9728 
9729 	battery_hook_register(&battery_hook);
9730 	return 0;
9731 }
9732 
9733 static void tpacpi_battery_exit(void)
9734 {
9735 	battery_hook_unregister(&battery_hook);
9736 }
9737 
9738 static struct ibm_struct battery_driver_data = {
9739 	.name = "battery",
9740 	.exit = tpacpi_battery_exit,
9741 };
9742 
9743 /*************************************************************************
9744  * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature
9745  */
9746 
9747 static int lcdshadow_state;
9748 
9749 static int lcdshadow_on_off(bool state)
9750 {
9751 	acpi_handle set_shadow_handle;
9752 	int output;
9753 
9754 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSSS", &set_shadow_handle))) {
9755 		pr_warn("Thinkpad ACPI has no %s interface.\n", "SSSS");
9756 		return -EIO;
9757 	}
9758 
9759 	if (!acpi_evalf(set_shadow_handle, &output, NULL, "dd", (int)state))
9760 		return -EIO;
9761 
9762 	lcdshadow_state = state;
9763 	return 0;
9764 }
9765 
9766 static int lcdshadow_set(bool on)
9767 {
9768 	if (lcdshadow_state < 0)
9769 		return lcdshadow_state;
9770 	if (lcdshadow_state == on)
9771 		return 0;
9772 	return lcdshadow_on_off(on);
9773 }
9774 
9775 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm)
9776 {
9777 	acpi_handle get_shadow_handle;
9778 	int output;
9779 
9780 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSSS", &get_shadow_handle))) {
9781 		lcdshadow_state = -ENODEV;
9782 		return 0;
9783 	}
9784 
9785 	if (!acpi_evalf(get_shadow_handle, &output, NULL, "dd", 0)) {
9786 		lcdshadow_state = -EIO;
9787 		return -EIO;
9788 	}
9789 	if (!(output & 0x10000)) {
9790 		lcdshadow_state = -ENODEV;
9791 		return 0;
9792 	}
9793 	lcdshadow_state = output & 0x1;
9794 
9795 	return 0;
9796 }
9797 
9798 static void lcdshadow_resume(void)
9799 {
9800 	if (lcdshadow_state >= 0)
9801 		lcdshadow_on_off(lcdshadow_state);
9802 }
9803 
9804 static int lcdshadow_read(struct seq_file *m)
9805 {
9806 	if (lcdshadow_state < 0) {
9807 		seq_puts(m, "status:\t\tnot supported\n");
9808 	} else {
9809 		seq_printf(m, "status:\t\t%d\n", lcdshadow_state);
9810 		seq_puts(m, "commands:\t0, 1\n");
9811 	}
9812 
9813 	return 0;
9814 }
9815 
9816 static int lcdshadow_write(char *buf)
9817 {
9818 	char *cmd;
9819 	int res, state = -EINVAL;
9820 
9821 	if (lcdshadow_state < 0)
9822 		return -ENODEV;
9823 
9824 	while ((cmd = strsep(&buf, ","))) {
9825 		res = kstrtoint(cmd, 10, &state);
9826 		if (res < 0)
9827 			return res;
9828 	}
9829 
9830 	if (state >= 2 || state < 0)
9831 		return -EINVAL;
9832 
9833 	return lcdshadow_set(state);
9834 }
9835 
9836 static struct ibm_struct lcdshadow_driver_data = {
9837 	.name = "lcdshadow",
9838 	.resume = lcdshadow_resume,
9839 	.read = lcdshadow_read,
9840 	.write = lcdshadow_write,
9841 };
9842 
9843 /*************************************************************************
9844  * Thinkpad sensor interfaces
9845  */
9846 
9847 #define DYTC_CMD_GET          2 /* To get current IC function and mode */
9848 #define DYTC_GET_LAPMODE_BIT 17 /* Set when in lapmode */
9849 
9850 #define PALMSENSOR_PRESENT_BIT 0 /* Determine if psensor present */
9851 #define PALMSENSOR_ON_BIT      1 /* psensor status */
9852 
9853 static bool has_palmsensor;
9854 static bool has_lapsensor;
9855 static bool palm_state;
9856 static bool lap_state;
9857 
9858 static int lapsensor_get(bool *present, bool *state)
9859 {
9860 	acpi_handle dytc_handle;
9861 	int output;
9862 
9863 	*present = false;
9864 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DYTC", &dytc_handle)))
9865 		return -ENODEV;
9866 	if (!acpi_evalf(dytc_handle, &output, NULL, "dd", DYTC_CMD_GET))
9867 		return -EIO;
9868 
9869 	*present = true; /*If we get his far, we have lapmode support*/
9870 	*state = output & BIT(DYTC_GET_LAPMODE_BIT) ? true : false;
9871 	return 0;
9872 }
9873 
9874 static int palmsensor_get(bool *present, bool *state)
9875 {
9876 	acpi_handle psensor_handle;
9877 	int output;
9878 
9879 	*present = false;
9880 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GPSS", &psensor_handle)))
9881 		return -ENODEV;
9882 	if (!acpi_evalf(psensor_handle, &output, NULL, "d"))
9883 		return -EIO;
9884 
9885 	*present = output & BIT(PALMSENSOR_PRESENT_BIT) ? true : false;
9886 	*state = output & BIT(PALMSENSOR_ON_BIT) ? true : false;
9887 	return 0;
9888 }
9889 
9890 static void lapsensor_refresh(void)
9891 {
9892 	bool state;
9893 	int err;
9894 
9895 	if (has_lapsensor) {
9896 		err = lapsensor_get(&has_lapsensor, &state);
9897 		if (err)
9898 			return;
9899 		if (lap_state != state) {
9900 			lap_state = state;
9901 			sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "dytc_lapmode");
9902 		}
9903 	}
9904 }
9905 
9906 static void palmsensor_refresh(void)
9907 {
9908 	bool state;
9909 	int err;
9910 
9911 	if (has_palmsensor) {
9912 		err = palmsensor_get(&has_palmsensor, &state);
9913 		if (err)
9914 			return;
9915 		if (palm_state != state) {
9916 			palm_state = state;
9917 			sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "palmsensor");
9918 		}
9919 	}
9920 }
9921 
9922 static ssize_t dytc_lapmode_show(struct device *dev,
9923 					struct device_attribute *attr,
9924 					char *buf)
9925 {
9926 	if (has_lapsensor)
9927 		return sysfs_emit(buf, "%d\n", lap_state);
9928 	return sysfs_emit(buf, "\n");
9929 }
9930 static DEVICE_ATTR_RO(dytc_lapmode);
9931 
9932 static ssize_t palmsensor_show(struct device *dev,
9933 					struct device_attribute *attr,
9934 					char *buf)
9935 {
9936 	if (has_palmsensor)
9937 		return sysfs_emit(buf, "%d\n", palm_state);
9938 	return sysfs_emit(buf, "\n");
9939 }
9940 static DEVICE_ATTR_RO(palmsensor);
9941 
9942 static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
9943 {
9944 	int palm_err, lap_err, err;
9945 
9946 	palm_err = palmsensor_get(&has_palmsensor, &palm_state);
9947 	lap_err = lapsensor_get(&has_lapsensor, &lap_state);
9948 	/*
9949 	 * If support isn't available (ENODEV) for both devices then quit, but
9950 	 * don't return an error.
9951 	 */
9952 	if ((palm_err == -ENODEV) && (lap_err == -ENODEV))
9953 		return 0;
9954 	/* Otherwise, if there was an error return it */
9955 	if (palm_err && (palm_err != -ENODEV))
9956 		return palm_err;
9957 	if (lap_err && (lap_err != -ENODEV))
9958 		return lap_err;
9959 
9960 	if (has_palmsensor) {
9961 		err = sysfs_create_file(&tpacpi_pdev->dev.kobj, &dev_attr_palmsensor.attr);
9962 		if (err)
9963 			return err;
9964 	}
9965 	if (has_lapsensor) {
9966 		err = sysfs_create_file(&tpacpi_pdev->dev.kobj, &dev_attr_dytc_lapmode.attr);
9967 		if (err)
9968 			return err;
9969 	}
9970 	return 0;
9971 }
9972 
9973 static void proxsensor_exit(void)
9974 {
9975 	if (has_lapsensor)
9976 		sysfs_remove_file(&tpacpi_pdev->dev.kobj, &dev_attr_dytc_lapmode.attr);
9977 	if (has_palmsensor)
9978 		sysfs_remove_file(&tpacpi_pdev->dev.kobj, &dev_attr_palmsensor.attr);
9979 }
9980 
9981 static struct ibm_struct proxsensor_driver_data = {
9982 	.name = "proximity-sensor",
9983 	.exit = proxsensor_exit,
9984 };
9985 
9986 /****************************************************************************
9987  ****************************************************************************
9988  *
9989  * Infrastructure
9990  *
9991  ****************************************************************************
9992  ****************************************************************************/
9993 
9994 /*
9995  * HKEY event callout for other subdrivers go here
9996  * (yes, it is ugly, but it is quick, safe, and gets the job done
9997  */
9998 static void tpacpi_driver_event(const unsigned int hkey_event)
9999 {
10000 	if (ibm_backlight_device) {
10001 		switch (hkey_event) {
10002 		case TP_HKEY_EV_BRGHT_UP:
10003 		case TP_HKEY_EV_BRGHT_DOWN:
10004 			tpacpi_brightness_notify_change();
10005 		}
10006 	}
10007 	if (alsa_card) {
10008 		switch (hkey_event) {
10009 		case TP_HKEY_EV_VOL_UP:
10010 		case TP_HKEY_EV_VOL_DOWN:
10011 		case TP_HKEY_EV_VOL_MUTE:
10012 			volume_alsa_notify_change();
10013 		}
10014 	}
10015 	if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
10016 		enum led_brightness brightness;
10017 
10018 		mutex_lock(&kbdlight_mutex);
10019 
10020 		/*
10021 		 * Check the brightness actually changed, setting the brightness
10022 		 * through kbdlight_set_level() also triggers this event.
10023 		 */
10024 		brightness = kbdlight_sysfs_get(NULL);
10025 		if (kbdlight_brightness != brightness) {
10026 			kbdlight_brightness = brightness;
10027 			led_classdev_notify_brightness_hw_changed(
10028 				&tpacpi_led_kbdlight.led_classdev, brightness);
10029 		}
10030 
10031 		mutex_unlock(&kbdlight_mutex);
10032 	}
10033 
10034 	if (hkey_event == TP_HKEY_EV_THM_CSM_COMPLETED)
10035 		lapsensor_refresh();
10036 }
10037 
10038 static void hotkey_driver_event(const unsigned int scancode)
10039 {
10040 	tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
10041 }
10042 
10043 /* --------------------------------------------------------------------- */
10044 
10045 /* /proc support */
10046 static struct proc_dir_entry *proc_dir;
10047 
10048 /*
10049  * Module and infrastructure proble, init and exit handling
10050  */
10051 
10052 static bool force_load;
10053 
10054 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
10055 static const char * __init str_supported(int is_supported)
10056 {
10057 	static char text_unsupported[] __initdata = "not supported";
10058 
10059 	return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
10060 }
10061 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
10062 
10063 static void ibm_exit(struct ibm_struct *ibm)
10064 {
10065 	dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
10066 
10067 	list_del_init(&ibm->all_drivers);
10068 
10069 	if (ibm->flags.acpi_notify_installed) {
10070 		dbg_printk(TPACPI_DBG_EXIT,
10071 			"%s: acpi_remove_notify_handler\n", ibm->name);
10072 		BUG_ON(!ibm->acpi);
10073 		acpi_remove_notify_handler(*ibm->acpi->handle,
10074 					   ibm->acpi->type,
10075 					   dispatch_acpi_notify);
10076 		ibm->flags.acpi_notify_installed = 0;
10077 	}
10078 
10079 	if (ibm->flags.proc_created) {
10080 		dbg_printk(TPACPI_DBG_EXIT,
10081 			"%s: remove_proc_entry\n", ibm->name);
10082 		remove_proc_entry(ibm->name, proc_dir);
10083 		ibm->flags.proc_created = 0;
10084 	}
10085 
10086 	if (ibm->flags.acpi_driver_registered) {
10087 		dbg_printk(TPACPI_DBG_EXIT,
10088 			"%s: acpi_bus_unregister_driver\n", ibm->name);
10089 		BUG_ON(!ibm->acpi);
10090 		acpi_bus_unregister_driver(ibm->acpi->driver);
10091 		kfree(ibm->acpi->driver);
10092 		ibm->acpi->driver = NULL;
10093 		ibm->flags.acpi_driver_registered = 0;
10094 	}
10095 
10096 	if (ibm->flags.init_called && ibm->exit) {
10097 		ibm->exit();
10098 		ibm->flags.init_called = 0;
10099 	}
10100 
10101 	dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
10102 }
10103 
10104 static int __init ibm_init(struct ibm_init_struct *iibm)
10105 {
10106 	int ret;
10107 	struct ibm_struct *ibm = iibm->data;
10108 	struct proc_dir_entry *entry;
10109 
10110 	BUG_ON(ibm == NULL);
10111 
10112 	INIT_LIST_HEAD(&ibm->all_drivers);
10113 
10114 	if (ibm->flags.experimental && !experimental)
10115 		return 0;
10116 
10117 	dbg_printk(TPACPI_DBG_INIT,
10118 		"probing for %s\n", ibm->name);
10119 
10120 	if (iibm->init) {
10121 		ret = iibm->init(iibm);
10122 		if (ret > 0)
10123 			return 0;	/* probe failed */
10124 		if (ret)
10125 			return ret;
10126 
10127 		ibm->flags.init_called = 1;
10128 	}
10129 
10130 	if (ibm->acpi) {
10131 		if (ibm->acpi->hid) {
10132 			ret = register_tpacpi_subdriver(ibm);
10133 			if (ret)
10134 				goto err_out;
10135 		}
10136 
10137 		if (ibm->acpi->notify) {
10138 			ret = setup_acpi_notify(ibm);
10139 			if (ret == -ENODEV) {
10140 				pr_notice("disabling subdriver %s\n",
10141 					  ibm->name);
10142 				ret = 0;
10143 				goto err_out;
10144 			}
10145 			if (ret < 0)
10146 				goto err_out;
10147 		}
10148 	}
10149 
10150 	dbg_printk(TPACPI_DBG_INIT,
10151 		"%s installed\n", ibm->name);
10152 
10153 	if (ibm->read) {
10154 		umode_t mode = iibm->base_procfs_mode;
10155 
10156 		if (!mode)
10157 			mode = S_IRUGO;
10158 		if (ibm->write)
10159 			mode |= S_IWUSR;
10160 		entry = proc_create_data(ibm->name, mode, proc_dir,
10161 					 &dispatch_proc_ops, ibm);
10162 		if (!entry) {
10163 			pr_err("unable to create proc entry %s\n", ibm->name);
10164 			ret = -ENODEV;
10165 			goto err_out;
10166 		}
10167 		ibm->flags.proc_created = 1;
10168 	}
10169 
10170 	list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
10171 
10172 	return 0;
10173 
10174 err_out:
10175 	dbg_printk(TPACPI_DBG_INIT,
10176 		"%s: at error exit path with result %d\n",
10177 		ibm->name, ret);
10178 
10179 	ibm_exit(ibm);
10180 	return (ret < 0) ? ret : 0;
10181 }
10182 
10183 /* Probing */
10184 
10185 static char __init tpacpi_parse_fw_id(const char * const s,
10186 				      u32 *model, u16 *release)
10187 {
10188 	int i;
10189 
10190 	if (!s || strlen(s) < 8)
10191 		goto invalid;
10192 
10193 	for (i = 0; i < 8; i++)
10194 		if (!((s[i] >= '0' && s[i] <= '9') ||
10195 		      (s[i] >= 'A' && s[i] <= 'Z')))
10196 			goto invalid;
10197 
10198 	/*
10199 	 * Most models: xxyTkkWW (#.##c)
10200 	 * Ancient 570/600 and -SL lacks (#.##c)
10201 	 */
10202 	if (s[3] == 'T' || s[3] == 'N') {
10203 		*model = TPID(s[0], s[1]);
10204 		*release = TPVER(s[4], s[5]);
10205 		return s[2];
10206 
10207 	/* New models: xxxyTkkW (#.##c); T550 and some others */
10208 	} else if (s[4] == 'T' || s[4] == 'N') {
10209 		*model = TPID3(s[0], s[1], s[2]);
10210 		*release = TPVER(s[5], s[6]);
10211 		return s[3];
10212 	}
10213 
10214 invalid:
10215 	return '\0';
10216 }
10217 
10218 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private)
10219 {
10220 	char *ec_fw_string = (char *) private;
10221 	const char *dmi_data = (const char *)dm;
10222 	/*
10223 	 * ThinkPad Embedded Controller Program Table on newer models
10224 	 *
10225 	 * Offset |  Name                | Width  | Description
10226 	 * ----------------------------------------------------
10227 	 *  0x00  | Type                 | BYTE   | 0x8C
10228 	 *  0x01  | Length               | BYTE   |
10229 	 *  0x02  | Handle               | WORD   | Varies
10230 	 *  0x04  | Signature            | BYTEx6 | ASCII for "LENOVO"
10231 	 *  0x0A  | OEM struct offset    | BYTE   | 0x0B
10232 	 *  0x0B  | OEM struct number    | BYTE   | 0x07, for this structure
10233 	 *  0x0C  | OEM struct revision  | BYTE   | 0x01, for this format
10234 	 *  0x0D  | ECP version ID       | STR ID |
10235 	 *  0x0E  | ECP release date     | STR ID |
10236 	 */
10237 
10238 	/* Return if data structure not match */
10239 	if (dm->type != 140 || dm->length < 0x0F ||
10240 	memcmp(dmi_data + 4, "LENOVO", 6) != 0 ||
10241 	dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 ||
10242 	dmi_data[0x0C] != 0x01)
10243 		return;
10244 
10245 	/* fwstr is the first 8byte string  */
10246 	strncpy(ec_fw_string, dmi_data + 0x0F, 8);
10247 }
10248 
10249 /* returns 0 - probe ok, or < 0 - probe error.
10250  * Probe ok doesn't mean thinkpad found.
10251  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
10252 static int __must_check __init get_thinkpad_model_data(
10253 						struct thinkpad_id_data *tp)
10254 {
10255 	const struct dmi_device *dev = NULL;
10256 	char ec_fw_string[18] = {0};
10257 	char const *s;
10258 	char t;
10259 
10260 	if (!tp)
10261 		return -EINVAL;
10262 
10263 	memset(tp, 0, sizeof(*tp));
10264 
10265 	if (dmi_name_in_vendors("IBM"))
10266 		tp->vendor = PCI_VENDOR_ID_IBM;
10267 	else if (dmi_name_in_vendors("LENOVO"))
10268 		tp->vendor = PCI_VENDOR_ID_LENOVO;
10269 	else
10270 		return 0;
10271 
10272 	s = dmi_get_system_info(DMI_BIOS_VERSION);
10273 	tp->bios_version_str = kstrdup(s, GFP_KERNEL);
10274 	if (s && !tp->bios_version_str)
10275 		return -ENOMEM;
10276 
10277 	/* Really ancient ThinkPad 240X will fail this, which is fine */
10278 	t = tpacpi_parse_fw_id(tp->bios_version_str,
10279 			       &tp->bios_model, &tp->bios_release);
10280 	if (t != 'E' && t != 'C')
10281 		return 0;
10282 
10283 	/*
10284 	 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
10285 	 * X32 or newer, all Z series;  Some models must have an
10286 	 * up-to-date BIOS or they will not be detected.
10287 	 *
10288 	 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
10289 	 */
10290 	while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
10291 		if (sscanf(dev->name,
10292 			   "IBM ThinkPad Embedded Controller -[%17c",
10293 			   ec_fw_string) == 1) {
10294 			ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
10295 			ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
10296 			break;
10297 		}
10298 	}
10299 
10300 	/* Newer ThinkPads have different EC program info table */
10301 	if (!ec_fw_string[0])
10302 		dmi_walk(find_new_ec_fwstr, &ec_fw_string);
10303 
10304 	if (ec_fw_string[0]) {
10305 		tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
10306 		if (!tp->ec_version_str)
10307 			return -ENOMEM;
10308 
10309 		t = tpacpi_parse_fw_id(ec_fw_string,
10310 			 &tp->ec_model, &tp->ec_release);
10311 		if (t != 'H') {
10312 			pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n",
10313 				  ec_fw_string);
10314 			pr_notice("please report this to %s\n", TPACPI_MAIL);
10315 		}
10316 	}
10317 
10318 	s = dmi_get_system_info(DMI_PRODUCT_VERSION);
10319 	if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
10320 		tp->model_str = kstrdup(s, GFP_KERNEL);
10321 		if (!tp->model_str)
10322 			return -ENOMEM;
10323 	} else {
10324 		s = dmi_get_system_info(DMI_BIOS_VENDOR);
10325 		if (s && !(strncasecmp(s, "Lenovo", 6))) {
10326 			tp->model_str = kstrdup(s, GFP_KERNEL);
10327 			if (!tp->model_str)
10328 				return -ENOMEM;
10329 		}
10330 	}
10331 
10332 	s = dmi_get_system_info(DMI_PRODUCT_NAME);
10333 	tp->nummodel_str = kstrdup(s, GFP_KERNEL);
10334 	if (s && !tp->nummodel_str)
10335 		return -ENOMEM;
10336 
10337 	return 0;
10338 }
10339 
10340 static int __init probe_for_thinkpad(void)
10341 {
10342 	int is_thinkpad;
10343 
10344 	if (acpi_disabled)
10345 		return -ENODEV;
10346 
10347 	/* It would be dangerous to run the driver in this case */
10348 	if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
10349 		return -ENODEV;
10350 
10351 	/*
10352 	 * Non-ancient models have better DMI tagging, but very old models
10353 	 * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
10354 	 */
10355 	is_thinkpad = (thinkpad_id.model_str != NULL) ||
10356 		      (thinkpad_id.ec_model != 0) ||
10357 		      tpacpi_is_fw_known();
10358 
10359 	/* The EC handler is required */
10360 	tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
10361 	if (!ec_handle) {
10362 		if (is_thinkpad)
10363 			pr_err("Not yet supported ThinkPad detected!\n");
10364 		return -ENODEV;
10365 	}
10366 
10367 	if (!is_thinkpad && !force_load)
10368 		return -ENODEV;
10369 
10370 	return 0;
10371 }
10372 
10373 static void __init thinkpad_acpi_init_banner(void)
10374 {
10375 	pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
10376 	pr_info("%s\n", TPACPI_URL);
10377 
10378 	pr_info("ThinkPad BIOS %s, EC %s\n",
10379 		(thinkpad_id.bios_version_str) ?
10380 			thinkpad_id.bios_version_str : "unknown",
10381 		(thinkpad_id.ec_version_str) ?
10382 			thinkpad_id.ec_version_str : "unknown");
10383 
10384 	BUG_ON(!thinkpad_id.vendor);
10385 
10386 	if (thinkpad_id.model_str)
10387 		pr_info("%s %s, model %s\n",
10388 			(thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
10389 				"IBM" : ((thinkpad_id.vendor ==
10390 						PCI_VENDOR_ID_LENOVO) ?
10391 					"Lenovo" : "Unknown vendor"),
10392 			thinkpad_id.model_str,
10393 			(thinkpad_id.nummodel_str) ?
10394 				thinkpad_id.nummodel_str : "unknown");
10395 }
10396 
10397 /* Module init, exit, parameters */
10398 
10399 static struct ibm_init_struct ibms_init[] __initdata = {
10400 	{
10401 		.data = &thinkpad_acpi_driver_data,
10402 	},
10403 	{
10404 		.init = hotkey_init,
10405 		.data = &hotkey_driver_data,
10406 	},
10407 	{
10408 		.init = bluetooth_init,
10409 		.data = &bluetooth_driver_data,
10410 	},
10411 	{
10412 		.init = wan_init,
10413 		.data = &wan_driver_data,
10414 	},
10415 	{
10416 		.init = uwb_init,
10417 		.data = &uwb_driver_data,
10418 	},
10419 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
10420 	{
10421 		.init = video_init,
10422 		.base_procfs_mode = S_IRUSR,
10423 		.data = &video_driver_data,
10424 	},
10425 #endif
10426 	{
10427 		.init = kbdlight_init,
10428 		.data = &kbdlight_driver_data,
10429 	},
10430 	{
10431 		.init = light_init,
10432 		.data = &light_driver_data,
10433 	},
10434 	{
10435 		.init = cmos_init,
10436 		.data = &cmos_driver_data,
10437 	},
10438 	{
10439 		.init = led_init,
10440 		.data = &led_driver_data,
10441 	},
10442 	{
10443 		.init = beep_init,
10444 		.data = &beep_driver_data,
10445 	},
10446 	{
10447 		.init = thermal_init,
10448 		.data = &thermal_driver_data,
10449 	},
10450 	{
10451 		.init = brightness_init,
10452 		.data = &brightness_driver_data,
10453 	},
10454 	{
10455 		.init = volume_init,
10456 		.data = &volume_driver_data,
10457 	},
10458 	{
10459 		.init = fan_init,
10460 		.data = &fan_driver_data,
10461 	},
10462 	{
10463 		.init = mute_led_init,
10464 		.data = &mute_led_driver_data,
10465 	},
10466 	{
10467 		.init = tpacpi_battery_init,
10468 		.data = &battery_driver_data,
10469 	},
10470 	{
10471 		.init = tpacpi_lcdshadow_init,
10472 		.data = &lcdshadow_driver_data,
10473 	},
10474 	{
10475 		.init = tpacpi_proxsensor_init,
10476 		.data = &proxsensor_driver_data,
10477 	},
10478 };
10479 
10480 static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
10481 {
10482 	unsigned int i;
10483 	struct ibm_struct *ibm;
10484 
10485 	if (!kp || !kp->name || !val)
10486 		return -EINVAL;
10487 
10488 	for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
10489 		ibm = ibms_init[i].data;
10490 		WARN_ON(ibm == NULL);
10491 
10492 		if (!ibm || !ibm->name)
10493 			continue;
10494 
10495 		if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
10496 			if (strlen(val) > sizeof(ibms_init[i].param) - 1)
10497 				return -ENOSPC;
10498 			strcpy(ibms_init[i].param, val);
10499 			return 0;
10500 		}
10501 	}
10502 
10503 	return -EINVAL;
10504 }
10505 
10506 module_param(experimental, int, 0444);
10507 MODULE_PARM_DESC(experimental,
10508 		 "Enables experimental features when non-zero");
10509 
10510 module_param_named(debug, dbg_level, uint, 0);
10511 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
10512 
10513 module_param(force_load, bool, 0444);
10514 MODULE_PARM_DESC(force_load,
10515 		 "Attempts to load the driver even on a mis-identified ThinkPad when true");
10516 
10517 module_param_named(fan_control, fan_control_allowed, bool, 0444);
10518 MODULE_PARM_DESC(fan_control,
10519 		 "Enables setting fan parameters features when true");
10520 
10521 module_param_named(brightness_mode, brightness_mode, uint, 0444);
10522 MODULE_PARM_DESC(brightness_mode,
10523 		 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
10524 
10525 module_param(brightness_enable, uint, 0444);
10526 MODULE_PARM_DESC(brightness_enable,
10527 		 "Enables backlight control when 1, disables when 0");
10528 
10529 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
10530 module_param_named(volume_mode, volume_mode, uint, 0444);
10531 MODULE_PARM_DESC(volume_mode,
10532 		 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
10533 
10534 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
10535 MODULE_PARM_DESC(volume_capabilities,
10536 		 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only");
10537 
10538 module_param_named(volume_control, volume_control_allowed, bool, 0444);
10539 MODULE_PARM_DESC(volume_control,
10540 		 "Enables software override for the console audio control when true");
10541 
10542 module_param_named(software_mute, software_mute_requested, bool, 0444);
10543 MODULE_PARM_DESC(software_mute,
10544 		 "Request full software mute control");
10545 
10546 /* ALSA module API parameters */
10547 module_param_named(index, alsa_index, int, 0444);
10548 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
10549 module_param_named(id, alsa_id, charp, 0444);
10550 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
10551 module_param_named(enable, alsa_enable, bool, 0444);
10552 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
10553 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
10554 
10555 /* The module parameter can't be read back, that's why 0 is used here */
10556 #define TPACPI_PARAM(feature) \
10557 	module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
10558 	MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation")
10559 
10560 TPACPI_PARAM(hotkey);
10561 TPACPI_PARAM(bluetooth);
10562 TPACPI_PARAM(video);
10563 TPACPI_PARAM(light);
10564 TPACPI_PARAM(cmos);
10565 TPACPI_PARAM(led);
10566 TPACPI_PARAM(beep);
10567 TPACPI_PARAM(brightness);
10568 TPACPI_PARAM(volume);
10569 TPACPI_PARAM(fan);
10570 
10571 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10572 module_param(dbg_wlswemul, uint, 0444);
10573 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
10574 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
10575 MODULE_PARM_DESC(wlsw_state,
10576 		 "Initial state of the emulated WLSW switch");
10577 
10578 module_param(dbg_bluetoothemul, uint, 0444);
10579 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
10580 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
10581 MODULE_PARM_DESC(bluetooth_state,
10582 		 "Initial state of the emulated bluetooth switch");
10583 
10584 module_param(dbg_wwanemul, uint, 0444);
10585 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
10586 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
10587 MODULE_PARM_DESC(wwan_state,
10588 		 "Initial state of the emulated WWAN switch");
10589 
10590 module_param(dbg_uwbemul, uint, 0444);
10591 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
10592 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
10593 MODULE_PARM_DESC(uwb_state,
10594 		 "Initial state of the emulated UWB switch");
10595 #endif
10596 
10597 static void thinkpad_acpi_module_exit(void)
10598 {
10599 	struct ibm_struct *ibm, *itmp;
10600 
10601 	tpacpi_lifecycle = TPACPI_LIFE_EXITING;
10602 
10603 	list_for_each_entry_safe_reverse(ibm, itmp,
10604 					 &tpacpi_all_drivers,
10605 					 all_drivers) {
10606 		ibm_exit(ibm);
10607 	}
10608 
10609 	dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
10610 
10611 	if (tpacpi_inputdev) {
10612 		if (tp_features.input_device_registered)
10613 			input_unregister_device(tpacpi_inputdev);
10614 		else
10615 			input_free_device(tpacpi_inputdev);
10616 		kfree(hotkey_keycode_map);
10617 	}
10618 
10619 	if (tpacpi_hwmon)
10620 		hwmon_device_unregister(tpacpi_hwmon);
10621 
10622 	if (tpacpi_sensors_pdev)
10623 		platform_device_unregister(tpacpi_sensors_pdev);
10624 	if (tpacpi_pdev)
10625 		platform_device_unregister(tpacpi_pdev);
10626 
10627 	if (tp_features.sensors_pdrv_attrs_registered)
10628 		tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
10629 	if (tp_features.platform_drv_attrs_registered)
10630 		tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
10631 
10632 	if (tp_features.sensors_pdrv_registered)
10633 		platform_driver_unregister(&tpacpi_hwmon_pdriver);
10634 
10635 	if (tp_features.platform_drv_registered)
10636 		platform_driver_unregister(&tpacpi_pdriver);
10637 
10638 	if (proc_dir)
10639 		remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
10640 
10641 	if (tpacpi_wq)
10642 		destroy_workqueue(tpacpi_wq);
10643 
10644 	kfree(thinkpad_id.bios_version_str);
10645 	kfree(thinkpad_id.ec_version_str);
10646 	kfree(thinkpad_id.model_str);
10647 	kfree(thinkpad_id.nummodel_str);
10648 }
10649 
10650 
10651 static int __init thinkpad_acpi_module_init(void)
10652 {
10653 	int ret, i;
10654 
10655 	tpacpi_lifecycle = TPACPI_LIFE_INIT;
10656 
10657 	/* Driver-level probe */
10658 
10659 	ret = get_thinkpad_model_data(&thinkpad_id);
10660 	if (ret) {
10661 		pr_err("unable to get DMI data: %d\n", ret);
10662 		thinkpad_acpi_module_exit();
10663 		return ret;
10664 	}
10665 	ret = probe_for_thinkpad();
10666 	if (ret) {
10667 		thinkpad_acpi_module_exit();
10668 		return ret;
10669 	}
10670 
10671 	/* Driver initialization */
10672 
10673 	thinkpad_acpi_init_banner();
10674 	tpacpi_check_outdated_fw();
10675 
10676 	TPACPI_ACPIHANDLE_INIT(ecrd);
10677 	TPACPI_ACPIHANDLE_INIT(ecwr);
10678 
10679 	tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
10680 	if (!tpacpi_wq) {
10681 		thinkpad_acpi_module_exit();
10682 		return -ENOMEM;
10683 	}
10684 
10685 	proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
10686 	if (!proc_dir) {
10687 		pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
10688 		thinkpad_acpi_module_exit();
10689 		return -ENODEV;
10690 	}
10691 
10692 	ret = platform_driver_register(&tpacpi_pdriver);
10693 	if (ret) {
10694 		pr_err("unable to register main platform driver\n");
10695 		thinkpad_acpi_module_exit();
10696 		return ret;
10697 	}
10698 	tp_features.platform_drv_registered = 1;
10699 
10700 	ret = platform_driver_register(&tpacpi_hwmon_pdriver);
10701 	if (ret) {
10702 		pr_err("unable to register hwmon platform driver\n");
10703 		thinkpad_acpi_module_exit();
10704 		return ret;
10705 	}
10706 	tp_features.sensors_pdrv_registered = 1;
10707 
10708 	ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
10709 	if (!ret) {
10710 		tp_features.platform_drv_attrs_registered = 1;
10711 		ret = tpacpi_create_driver_attributes(
10712 					&tpacpi_hwmon_pdriver.driver);
10713 	}
10714 	if (ret) {
10715 		pr_err("unable to create sysfs driver attributes\n");
10716 		thinkpad_acpi_module_exit();
10717 		return ret;
10718 	}
10719 	tp_features.sensors_pdrv_attrs_registered = 1;
10720 
10721 
10722 	/* Device initialization */
10723 	tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
10724 							NULL, 0);
10725 	if (IS_ERR(tpacpi_pdev)) {
10726 		ret = PTR_ERR(tpacpi_pdev);
10727 		tpacpi_pdev = NULL;
10728 		pr_err("unable to register platform device\n");
10729 		thinkpad_acpi_module_exit();
10730 		return ret;
10731 	}
10732 	tpacpi_sensors_pdev = platform_device_register_simple(
10733 						TPACPI_HWMON_DRVR_NAME,
10734 						-1, NULL, 0);
10735 	if (IS_ERR(tpacpi_sensors_pdev)) {
10736 		ret = PTR_ERR(tpacpi_sensors_pdev);
10737 		tpacpi_sensors_pdev = NULL;
10738 		pr_err("unable to register hwmon platform device\n");
10739 		thinkpad_acpi_module_exit();
10740 		return ret;
10741 	}
10742 	tp_features.sensors_pdev_attrs_registered = 1;
10743 	tpacpi_hwmon = hwmon_device_register_with_groups(
10744 		&tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL);
10745 
10746 	if (IS_ERR(tpacpi_hwmon)) {
10747 		ret = PTR_ERR(tpacpi_hwmon);
10748 		tpacpi_hwmon = NULL;
10749 		pr_err("unable to register hwmon device\n");
10750 		thinkpad_acpi_module_exit();
10751 		return ret;
10752 	}
10753 	mutex_init(&tpacpi_inputdev_send_mutex);
10754 	tpacpi_inputdev = input_allocate_device();
10755 	if (!tpacpi_inputdev) {
10756 		thinkpad_acpi_module_exit();
10757 		return -ENOMEM;
10758 	} else {
10759 		/* Prepare input device, but don't register */
10760 		tpacpi_inputdev->name = "ThinkPad Extra Buttons";
10761 		tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
10762 		tpacpi_inputdev->id.bustype = BUS_HOST;
10763 		tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
10764 		tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
10765 		tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
10766 		tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
10767 	}
10768 
10769 	/* Init subdriver dependencies */
10770 	tpacpi_detect_brightness_capabilities();
10771 
10772 	/* Init subdrivers */
10773 	for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
10774 		ret = ibm_init(&ibms_init[i]);
10775 		if (ret >= 0 && *ibms_init[i].param)
10776 			ret = ibms_init[i].data->write(ibms_init[i].param);
10777 		if (ret < 0) {
10778 			thinkpad_acpi_module_exit();
10779 			return ret;
10780 		}
10781 	}
10782 
10783 	tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
10784 
10785 	ret = input_register_device(tpacpi_inputdev);
10786 	if (ret < 0) {
10787 		pr_err("unable to register input device\n");
10788 		thinkpad_acpi_module_exit();
10789 		return ret;
10790 	} else {
10791 		tp_features.input_device_registered = 1;
10792 	}
10793 
10794 	return 0;
10795 }
10796 
10797 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
10798 
10799 /*
10800  * This will autoload the driver in almost every ThinkPad
10801  * in widespread use.
10802  *
10803  * Only _VERY_ old models, like the 240, 240x and 570 lack
10804  * the HKEY event interface.
10805  */
10806 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
10807 
10808 /*
10809  * DMI matching for module autoloading
10810  *
10811  * See https://thinkwiki.org/wiki/List_of_DMI_IDs
10812  * See https://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
10813  *
10814  * Only models listed in thinkwiki will be supported, so add yours
10815  * if it is not there yet.
10816  */
10817 #define IBM_BIOS_MODULE_ALIAS(__type) \
10818 	MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
10819 
10820 /* Ancient thinkpad BIOSes have to be identified by
10821  * BIOS type or model number, and there are far less
10822  * BIOS types than model numbers... */
10823 IBM_BIOS_MODULE_ALIAS("I[MU]");		/* 570, 570e */
10824 
10825 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
10826 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
10827 MODULE_DESCRIPTION(TPACPI_DESC);
10828 MODULE_VERSION(TPACPI_VERSION);
10829 MODULE_LICENSE("GPL");
10830 
10831 module_init(thinkpad_acpi_module_init);
10832 module_exit(thinkpad_acpi_module_exit);
10833