xref: /linux/drivers/platform/x86/ideapad-laptop.c (revision f5a2601378af1ea1e2a51d613e49e629159dc956)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
4  *
5  *  Copyright © 2010 Intel Corporation
6  *  Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
7  */
8 
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 
11 #include <linux/acpi.h>
12 #include <linux/backlight.h>
13 #include <linux/bitfield.h>
14 #include <linux/bitops.h>
15 #include <linux/bug.h>
16 #include <linux/cleanup.h>
17 #include <linux/debugfs.h>
18 #include <linux/device.h>
19 #include <linux/dmi.h>
20 #include <linux/i8042.h>
21 #include <linux/init.h>
22 #include <linux/input.h>
23 #include <linux/input/sparse-keymap.h>
24 #include <linux/jiffies.h>
25 #include <linux/kernel.h>
26 #include <linux/leds.h>
27 #include <linux/module.h>
28 #include <linux/platform_device.h>
29 #include <linux/platform_profile.h>
30 #include <linux/rfkill.h>
31 #include <linux/seq_file.h>
32 #include <linux/sysfs.h>
33 #include <linux/types.h>
34 #include <linux/wmi.h>
35 #include "ideapad-laptop.h"
36 
37 #include <acpi/video.h>
38 
39 #include <dt-bindings/leds/common.h>
40 
41 #define IDEAPAD_RFKILL_DEV_NUM	3
42 
43 enum {
44 	CFG_CAP_BT_BIT       = 16,
45 	CFG_CAP_3G_BIT       = 17,
46 	CFG_CAP_WIFI_BIT     = 18,
47 	CFG_CAP_CAM_BIT      = 19,
48 
49 	/*
50 	 * These are OnScreenDisplay support bits that can be useful to determine
51 	 * whether a hotkey exists/should show OSD. But they aren't particularly
52 	 * meaningful since they were introduced later, i.e. 2010 IdeaPads
53 	 * don't have these, but they still have had OSD for hotkeys.
54 	 */
55 	CFG_OSD_NUMLK_BIT    = 27,
56 	CFG_OSD_CAPSLK_BIT   = 28,
57 	CFG_OSD_MICMUTE_BIT  = 29,
58 	CFG_OSD_TOUCHPAD_BIT = 30,
59 	CFG_OSD_CAM_BIT      = 31,
60 };
61 
62 enum {
63 	GBMD_CONSERVATION_STATE_BIT = 5,
64 };
65 
66 enum {
67 	SBMC_CONSERVATION_ON  = 3,
68 	SBMC_CONSERVATION_OFF = 5,
69 };
70 
71 enum {
72 	HALS_KBD_BL_SUPPORT_BIT       = 4,
73 	HALS_KBD_BL_STATE_BIT         = 5,
74 	HALS_USB_CHARGING_SUPPORT_BIT = 6,
75 	HALS_USB_CHARGING_STATE_BIT   = 7,
76 	HALS_FNLOCK_SUPPORT_BIT       = 9,
77 	HALS_FNLOCK_STATE_BIT         = 10,
78 	HALS_HOTKEYS_PRIMARY_BIT      = 11,
79 };
80 
81 enum {
82 	SALS_KBD_BL_ON        = 0x8,
83 	SALS_KBD_BL_OFF       = 0x9,
84 	SALS_USB_CHARGING_ON  = 0xa,
85 	SALS_USB_CHARGING_OFF = 0xb,
86 	SALS_FNLOCK_ON        = 0xe,
87 	SALS_FNLOCK_OFF       = 0xf,
88 };
89 
90 enum {
91 	VPCCMD_R_VPC1 = 0x10,
92 	VPCCMD_R_BL_MAX,
93 	VPCCMD_R_BL,
94 	VPCCMD_W_BL,
95 	VPCCMD_R_WIFI,
96 	VPCCMD_W_WIFI,
97 	VPCCMD_R_BT,
98 	VPCCMD_W_BT,
99 	VPCCMD_R_BL_POWER,
100 	VPCCMD_R_NOVO,
101 	VPCCMD_R_VPC2,
102 	VPCCMD_R_TOUCHPAD,
103 	VPCCMD_W_TOUCHPAD,
104 	VPCCMD_R_CAMERA,
105 	VPCCMD_W_CAMERA,
106 	VPCCMD_R_3G,
107 	VPCCMD_W_3G,
108 	VPCCMD_R_ODD, /* 0x21 */
109 	VPCCMD_W_FAN,
110 	VPCCMD_R_RF,
111 	VPCCMD_W_RF,
112 	VPCCMD_W_YMC = 0x2A,
113 	VPCCMD_R_FAN = 0x2B,
114 	VPCCMD_R_SPECIAL_BUTTONS = 0x31,
115 	VPCCMD_W_BL_POWER = 0x33,
116 };
117 
118 /*
119  * These correspond to the number of supported states - 1
120  * Future keyboard types may need a new system, if there's a collision
121  * KBD_BL_TRISTATE_AUTO has no way to report or set the auto state
122  * so it effectively has 3 states, but needs to handle 4
123  */
124 enum {
125 	KBD_BL_STANDARD      = 1,
126 	KBD_BL_TRISTATE      = 2,
127 	KBD_BL_TRISTATE_AUTO = 3,
128 };
129 
130 #define KBD_BL_QUERY_TYPE		0x1
131 #define KBD_BL_TRISTATE_TYPE		0x5
132 #define KBD_BL_TRISTATE_AUTO_TYPE	0x7
133 
134 #define KBD_BL_COMMAND_GET		0x2
135 #define KBD_BL_COMMAND_SET		0x3
136 #define KBD_BL_COMMAND_TYPE		GENMASK(7, 4)
137 
138 #define KBD_BL_GET_BRIGHTNESS		GENMASK(15, 1)
139 #define KBD_BL_SET_BRIGHTNESS		GENMASK(19, 16)
140 
141 #define KBD_BL_KBLC_CHANGED_EVENT	12
142 
143 struct ideapad_dytc_priv {
144 	enum platform_profile_option current_profile;
145 	struct device *ppdev; /* platform profile device */
146 	struct mutex mutex; /* protects the DYTC interface */
147 	struct ideapad_private *priv;
148 };
149 
150 struct ideapad_rfk_priv {
151 	int dev;
152 	struct ideapad_private *priv;
153 };
154 
155 struct ideapad_private {
156 	struct acpi_device *adev;
157 	struct mutex vpc_mutex; /* protects the VPC calls */
158 	struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
159 	struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
160 	struct platform_device *platform_device;
161 	struct input_dev *inputdev;
162 	struct backlight_device *blightdev;
163 	struct ideapad_dytc_priv *dytc;
164 	struct dentry *debug;
165 	unsigned long cfg;
166 	unsigned long r_touchpad_val;
167 	struct {
168 		bool conservation_mode    : 1;
169 		bool dytc                 : 1;
170 		bool fan_mode             : 1;
171 		bool fn_lock              : 1;
172 		bool set_fn_lock_led      : 1;
173 		bool hw_rfkill_switch     : 1;
174 		bool kbd_bl               : 1;
175 		bool touchpad_ctrl_via_ec : 1;
176 		bool ctrl_ps2_aux_port    : 1;
177 		bool usb_charging         : 1;
178 		bool ymc_ec_trigger       : 1;
179 	} features;
180 	struct {
181 		bool initialized;
182 		int type;
183 		struct led_classdev led;
184 		unsigned int last_brightness;
185 	} kbd_bl;
186 	struct {
187 		bool initialized;
188 		struct led_classdev led;
189 		unsigned int last_brightness;
190 	} fn_lock;
191 };
192 
193 static bool no_bt_rfkill;
194 module_param(no_bt_rfkill, bool, 0444);
195 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
196 
197 static bool allow_v4_dytc;
198 module_param(allow_v4_dytc, bool, 0444);
199 MODULE_PARM_DESC(allow_v4_dytc,
200 	"Enable DYTC version 4 platform-profile support. "
201 	"If you need this please report this to: platform-driver-x86@vger.kernel.org");
202 
203 static bool hw_rfkill_switch;
204 module_param(hw_rfkill_switch, bool, 0444);
205 MODULE_PARM_DESC(hw_rfkill_switch,
206 	"Enable rfkill support for laptops with a hw on/off wifi switch/slider. "
207 	"If you need this please report this to: platform-driver-x86@vger.kernel.org");
208 
209 static bool set_fn_lock_led;
210 module_param(set_fn_lock_led, bool, 0444);
211 MODULE_PARM_DESC(set_fn_lock_led,
212 	"Enable driver based updates of the fn-lock LED on fn-lock changes. "
213 	"If you need this please report this to: platform-driver-x86@vger.kernel.org");
214 
215 static bool ctrl_ps2_aux_port;
216 module_param(ctrl_ps2_aux_port, bool, 0444);
217 MODULE_PARM_DESC(ctrl_ps2_aux_port,
218 	"Enable driver based PS/2 aux port en-/dis-abling on touchpad on/off toggle. "
219 	"If you need this please report this to: platform-driver-x86@vger.kernel.org");
220 
221 static bool touchpad_ctrl_via_ec;
222 module_param(touchpad_ctrl_via_ec, bool, 0444);
223 MODULE_PARM_DESC(touchpad_ctrl_via_ec,
224 	"Enable registering a 'touchpad' sysfs-attribute which can be used to manually "
225 	"tell the EC to enable/disable the touchpad. This may not work on all models.");
226 
227 static bool ymc_ec_trigger __read_mostly;
228 module_param(ymc_ec_trigger, bool, 0444);
229 MODULE_PARM_DESC(ymc_ec_trigger,
230 	"Enable EC triggering work-around to force emitting tablet mode events. "
231 	"If you need this please report this to: platform-driver-x86@vger.kernel.org");
232 
233 /*
234  * shared data
235  */
236 
237 static struct ideapad_private *ideapad_shared;
238 static DEFINE_MUTEX(ideapad_shared_mutex);
239 
ideapad_shared_init(struct ideapad_private * priv)240 static int ideapad_shared_init(struct ideapad_private *priv)
241 {
242 	int ret;
243 
244 	guard(mutex)(&ideapad_shared_mutex);
245 
246 	if (!ideapad_shared) {
247 		ideapad_shared = priv;
248 		ret = 0;
249 	} else {
250 		dev_warn(&priv->adev->dev, "found multiple platform devices\n");
251 		ret = -EINVAL;
252 	}
253 
254 	return ret;
255 }
256 
ideapad_shared_exit(struct ideapad_private * priv)257 static void ideapad_shared_exit(struct ideapad_private *priv)
258 {
259 	guard(mutex)(&ideapad_shared_mutex);
260 
261 	if (ideapad_shared == priv)
262 		ideapad_shared = NULL;
263 }
264 
265 /*
266  * ACPI Helpers
267  */
268 #define IDEAPAD_EC_TIMEOUT 200 /* in ms */
269 
eval_int(acpi_handle handle,const char * name,unsigned long * res)270 static int eval_int(acpi_handle handle, const char *name, unsigned long *res)
271 {
272 	unsigned long long result;
273 	acpi_status status;
274 
275 	status = acpi_evaluate_integer(handle, (char *)name, NULL, &result);
276 	if (ACPI_FAILURE(status))
277 		return -EIO;
278 
279 	*res = result;
280 
281 	return 0;
282 }
283 
eval_int_with_arg(acpi_handle handle,const char * name,unsigned long arg,unsigned long * res)284 static int eval_int_with_arg(acpi_handle handle, const char *name, unsigned long arg,
285 			     unsigned long *res)
286 {
287 	struct acpi_object_list params;
288 	unsigned long long result;
289 	union acpi_object in_obj;
290 	acpi_status status;
291 
292 	params.count = 1;
293 	params.pointer = &in_obj;
294 	in_obj.type = ACPI_TYPE_INTEGER;
295 	in_obj.integer.value = arg;
296 
297 	status = acpi_evaluate_integer(handle, (char *)name, &params, &result);
298 	if (ACPI_FAILURE(status))
299 		return -EIO;
300 
301 	if (res)
302 		*res = result;
303 
304 	return 0;
305 }
306 
exec_simple_method(acpi_handle handle,const char * name,unsigned long arg)307 static int exec_simple_method(acpi_handle handle, const char *name, unsigned long arg)
308 {
309 	acpi_status status = acpi_execute_simple_method(handle, (char *)name, arg);
310 
311 	return ACPI_FAILURE(status) ? -EIO : 0;
312 }
313 
eval_gbmd(acpi_handle handle,unsigned long * res)314 static int eval_gbmd(acpi_handle handle, unsigned long *res)
315 {
316 	return eval_int(handle, "GBMD", res);
317 }
318 
exec_sbmc(acpi_handle handle,unsigned long arg)319 static int exec_sbmc(acpi_handle handle, unsigned long arg)
320 {
321 	return exec_simple_method(handle, "SBMC", arg);
322 }
323 
eval_hals(acpi_handle handle,unsigned long * res)324 static int eval_hals(acpi_handle handle, unsigned long *res)
325 {
326 	return eval_int(handle, "HALS", res);
327 }
328 
exec_sals(acpi_handle handle,unsigned long arg)329 static int exec_sals(acpi_handle handle, unsigned long arg)
330 {
331 	return exec_simple_method(handle, "SALS", arg);
332 }
333 
exec_kblc(acpi_handle handle,unsigned long arg)334 static int exec_kblc(acpi_handle handle, unsigned long arg)
335 {
336 	return exec_simple_method(handle, "KBLC", arg);
337 }
338 
eval_kblc(acpi_handle handle,unsigned long cmd,unsigned long * res)339 static int eval_kblc(acpi_handle handle, unsigned long cmd, unsigned long *res)
340 {
341 	return eval_int_with_arg(handle, "KBLC", cmd, res);
342 }
343 
eval_dytc(acpi_handle handle,unsigned long cmd,unsigned long * res)344 static int eval_dytc(acpi_handle handle, unsigned long cmd, unsigned long *res)
345 {
346 	return eval_int_with_arg(handle, "DYTC", cmd, res);
347 }
348 
eval_vpcr(acpi_handle handle,unsigned long cmd,unsigned long * res)349 static int eval_vpcr(acpi_handle handle, unsigned long cmd, unsigned long *res)
350 {
351 	return eval_int_with_arg(handle, "VPCR", cmd, res);
352 }
353 
eval_vpcw(acpi_handle handle,unsigned long cmd,unsigned long data)354 static int eval_vpcw(acpi_handle handle, unsigned long cmd, unsigned long data)
355 {
356 	struct acpi_object_list params;
357 	union acpi_object in_obj[2];
358 	acpi_status status;
359 
360 	params.count = 2;
361 	params.pointer = in_obj;
362 	in_obj[0].type = ACPI_TYPE_INTEGER;
363 	in_obj[0].integer.value = cmd;
364 	in_obj[1].type = ACPI_TYPE_INTEGER;
365 	in_obj[1].integer.value = data;
366 
367 	status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
368 	if (ACPI_FAILURE(status))
369 		return -EIO;
370 
371 	return 0;
372 }
373 
read_ec_data(acpi_handle handle,unsigned long cmd,unsigned long * data)374 static int read_ec_data(acpi_handle handle, unsigned long cmd, unsigned long *data)
375 {
376 	unsigned long end_jiffies, val;
377 	int err;
378 
379 	err = eval_vpcw(handle, 1, cmd);
380 	if (err)
381 		return err;
382 
383 	end_jiffies = jiffies + msecs_to_jiffies(IDEAPAD_EC_TIMEOUT) + 1;
384 
385 	while (time_before(jiffies, end_jiffies)) {
386 		schedule();
387 
388 		err = eval_vpcr(handle, 1, &val);
389 		if (err)
390 			return err;
391 
392 		if (val == 0)
393 			return eval_vpcr(handle, 0, data);
394 	}
395 
396 	acpi_handle_err(handle, "timeout in %s\n", __func__);
397 
398 	return -ETIMEDOUT;
399 }
400 
write_ec_cmd(acpi_handle handle,unsigned long cmd,unsigned long data)401 static int write_ec_cmd(acpi_handle handle, unsigned long cmd, unsigned long data)
402 {
403 	unsigned long end_jiffies, val;
404 	int err;
405 
406 	err = eval_vpcw(handle, 0, data);
407 	if (err)
408 		return err;
409 
410 	err = eval_vpcw(handle, 1, cmd);
411 	if (err)
412 		return err;
413 
414 	end_jiffies = jiffies + msecs_to_jiffies(IDEAPAD_EC_TIMEOUT) + 1;
415 
416 	while (time_before(jiffies, end_jiffies)) {
417 		schedule();
418 
419 		err = eval_vpcr(handle, 1, &val);
420 		if (err)
421 			return err;
422 
423 		if (val == 0)
424 			return 0;
425 	}
426 
427 	acpi_handle_err(handle, "timeout in %s\n", __func__);
428 
429 	return -ETIMEDOUT;
430 }
431 
432 /*
433  * debugfs
434  */
debugfs_status_show(struct seq_file * s,void * data)435 static int debugfs_status_show(struct seq_file *s, void *data)
436 {
437 	struct ideapad_private *priv = s->private;
438 	unsigned long value;
439 
440 	guard(mutex)(&priv->vpc_mutex);
441 
442 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
443 		seq_printf(s, "Backlight max:  %lu\n", value);
444 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
445 		seq_printf(s, "Backlight now:  %lu\n", value);
446 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
447 		seq_printf(s, "BL power value: %s (%lu)\n", value ? "on" : "off", value);
448 
449 	seq_puts(s, "=====================\n");
450 
451 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
452 		seq_printf(s, "Radio status: %s (%lu)\n", value ? "on" : "off", value);
453 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
454 		seq_printf(s, "Wifi status:  %s (%lu)\n", value ? "on" : "off", value);
455 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
456 		seq_printf(s, "BT status:    %s (%lu)\n", value ? "on" : "off", value);
457 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
458 		seq_printf(s, "3G status:    %s (%lu)\n", value ? "on" : "off", value);
459 
460 	seq_puts(s, "=====================\n");
461 
462 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
463 		seq_printf(s, "Touchpad status: %s (%lu)\n", value ? "on" : "off", value);
464 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
465 		seq_printf(s, "Camera status:   %s (%lu)\n", value ? "on" : "off", value);
466 
467 	seq_puts(s, "=====================\n");
468 
469 	if (!eval_gbmd(priv->adev->handle, &value))
470 		seq_printf(s, "GBMD: %#010lx\n", value);
471 	if (!eval_hals(priv->adev->handle, &value))
472 		seq_printf(s, "HALS: %#010lx\n", value);
473 
474 	return 0;
475 }
476 DEFINE_SHOW_ATTRIBUTE(debugfs_status);
477 
debugfs_cfg_show(struct seq_file * s,void * data)478 static int debugfs_cfg_show(struct seq_file *s, void *data)
479 {
480 	struct ideapad_private *priv = s->private;
481 
482 	seq_printf(s, "_CFG: %#010lx\n\n", priv->cfg);
483 
484 	seq_puts(s, "Capabilities:");
485 	if (test_bit(CFG_CAP_BT_BIT, &priv->cfg))
486 		seq_puts(s, " bluetooth");
487 	if (test_bit(CFG_CAP_3G_BIT, &priv->cfg))
488 		seq_puts(s, " 3G");
489 	if (test_bit(CFG_CAP_WIFI_BIT, &priv->cfg))
490 		seq_puts(s, " wifi");
491 	if (test_bit(CFG_CAP_CAM_BIT, &priv->cfg))
492 		seq_puts(s, " camera");
493 	seq_puts(s, "\n");
494 
495 	seq_puts(s, "OSD support:");
496 	if (test_bit(CFG_OSD_NUMLK_BIT, &priv->cfg))
497 		seq_puts(s, " num-lock");
498 	if (test_bit(CFG_OSD_CAPSLK_BIT, &priv->cfg))
499 		seq_puts(s, " caps-lock");
500 	if (test_bit(CFG_OSD_MICMUTE_BIT, &priv->cfg))
501 		seq_puts(s, " mic-mute");
502 	if (test_bit(CFG_OSD_TOUCHPAD_BIT, &priv->cfg))
503 		seq_puts(s, " touchpad");
504 	if (test_bit(CFG_OSD_CAM_BIT, &priv->cfg))
505 		seq_puts(s, " camera");
506 	seq_puts(s, "\n");
507 
508 	seq_puts(s, "Graphics: ");
509 	switch (priv->cfg & 0x700) {
510 	case 0x100:
511 		seq_puts(s, "Intel");
512 		break;
513 	case 0x200:
514 		seq_puts(s, "ATI");
515 		break;
516 	case 0x300:
517 		seq_puts(s, "Nvidia");
518 		break;
519 	case 0x400:
520 		seq_puts(s, "Intel and ATI");
521 		break;
522 	case 0x500:
523 		seq_puts(s, "Intel and Nvidia");
524 		break;
525 	}
526 	seq_puts(s, "\n");
527 
528 	return 0;
529 }
530 DEFINE_SHOW_ATTRIBUTE(debugfs_cfg);
531 
ideapad_debugfs_init(struct ideapad_private * priv)532 static void ideapad_debugfs_init(struct ideapad_private *priv)
533 {
534 	struct dentry *dir;
535 
536 	dir = debugfs_create_dir("ideapad", NULL);
537 	priv->debug = dir;
538 
539 	debugfs_create_file("cfg", 0444, dir, priv, &debugfs_cfg_fops);
540 	debugfs_create_file("status", 0444, dir, priv, &debugfs_status_fops);
541 }
542 
ideapad_debugfs_exit(struct ideapad_private * priv)543 static void ideapad_debugfs_exit(struct ideapad_private *priv)
544 {
545 	debugfs_remove_recursive(priv->debug);
546 	priv->debug = NULL;
547 }
548 
549 /*
550  * sysfs
551  */
camera_power_show(struct device * dev,struct device_attribute * attr,char * buf)552 static ssize_t camera_power_show(struct device *dev,
553 				 struct device_attribute *attr,
554 				 char *buf)
555 {
556 	struct ideapad_private *priv = dev_get_drvdata(dev);
557 	unsigned long result = 0;
558 	int err;
559 
560 	scoped_guard(mutex, &priv->vpc_mutex) {
561 		err = read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result);
562 		if (err)
563 			return err;
564 	}
565 
566 	return sysfs_emit(buf, "%d\n", !!result);
567 }
568 
camera_power_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)569 static ssize_t camera_power_store(struct device *dev,
570 				  struct device_attribute *attr,
571 				  const char *buf, size_t count)
572 {
573 	struct ideapad_private *priv = dev_get_drvdata(dev);
574 	bool state;
575 	int err;
576 
577 	err = kstrtobool(buf, &state);
578 	if (err)
579 		return err;
580 
581 	scoped_guard(mutex, &priv->vpc_mutex) {
582 		err = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
583 		if (err)
584 			return err;
585 	}
586 
587 	return count;
588 }
589 
590 static DEVICE_ATTR_RW(camera_power);
591 
conservation_mode_show(struct device * dev,struct device_attribute * attr,char * buf)592 static ssize_t conservation_mode_show(struct device *dev,
593 				      struct device_attribute *attr,
594 				      char *buf)
595 {
596 	struct ideapad_private *priv = dev_get_drvdata(dev);
597 	unsigned long result;
598 	int err;
599 
600 	err = eval_gbmd(priv->adev->handle, &result);
601 	if (err)
602 		return err;
603 
604 	return sysfs_emit(buf, "%d\n", !!test_bit(GBMD_CONSERVATION_STATE_BIT, &result));
605 }
606 
conservation_mode_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)607 static ssize_t conservation_mode_store(struct device *dev,
608 				       struct device_attribute *attr,
609 				       const char *buf, size_t count)
610 {
611 	struct ideapad_private *priv = dev_get_drvdata(dev);
612 	bool state;
613 	int err;
614 
615 	err = kstrtobool(buf, &state);
616 	if (err)
617 		return err;
618 
619 	err = exec_sbmc(priv->adev->handle, state ? SBMC_CONSERVATION_ON : SBMC_CONSERVATION_OFF);
620 	if (err)
621 		return err;
622 
623 	return count;
624 }
625 
626 static DEVICE_ATTR_RW(conservation_mode);
627 
fan_mode_show(struct device * dev,struct device_attribute * attr,char * buf)628 static ssize_t fan_mode_show(struct device *dev,
629 			     struct device_attribute *attr,
630 			     char *buf)
631 {
632 	struct ideapad_private *priv = dev_get_drvdata(dev);
633 	unsigned long result = 0;
634 	int err;
635 
636 	scoped_guard(mutex, &priv->vpc_mutex) {
637 		err = read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result);
638 		if (err)
639 			return err;
640 	}
641 
642 	return sysfs_emit(buf, "%lu\n", result);
643 }
644 
fan_mode_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)645 static ssize_t fan_mode_store(struct device *dev,
646 			      struct device_attribute *attr,
647 			      const char *buf, size_t count)
648 {
649 	struct ideapad_private *priv = dev_get_drvdata(dev);
650 	unsigned int state;
651 	int err;
652 
653 	err = kstrtouint(buf, 0, &state);
654 	if (err)
655 		return err;
656 
657 	if (state > 4 || state == 3)
658 		return -EINVAL;
659 
660 	scoped_guard(mutex, &priv->vpc_mutex) {
661 		err = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
662 		if (err)
663 			return err;
664 	}
665 
666 	return count;
667 }
668 
669 static DEVICE_ATTR_RW(fan_mode);
670 
ideapad_fn_lock_get(struct ideapad_private * priv)671 static int ideapad_fn_lock_get(struct ideapad_private *priv)
672 {
673 	unsigned long hals;
674 	int err;
675 
676 	err = eval_hals(priv->adev->handle, &hals);
677 	if (err)
678 		return err;
679 
680 	return !!test_bit(HALS_FNLOCK_STATE_BIT, &hals);
681 }
682 
ideapad_fn_lock_set(struct ideapad_private * priv,bool state)683 static int ideapad_fn_lock_set(struct ideapad_private *priv, bool state)
684 {
685 	return exec_sals(priv->adev->handle,
686 		state ? SALS_FNLOCK_ON : SALS_FNLOCK_OFF);
687 }
688 
ideapad_fn_lock_led_notify(struct ideapad_private * priv,int brightness)689 static void ideapad_fn_lock_led_notify(struct ideapad_private *priv, int brightness)
690 {
691 	if (!priv->fn_lock.initialized)
692 		return;
693 
694 	if (brightness == priv->fn_lock.last_brightness)
695 		return;
696 
697 	priv->fn_lock.last_brightness = brightness;
698 
699 	led_classdev_notify_brightness_hw_changed(&priv->fn_lock.led, brightness);
700 }
701 
fn_lock_show(struct device * dev,struct device_attribute * attr,char * buf)702 static ssize_t fn_lock_show(struct device *dev,
703 			    struct device_attribute *attr,
704 			    char *buf)
705 {
706 	struct ideapad_private *priv = dev_get_drvdata(dev);
707 	int brightness;
708 
709 	brightness = ideapad_fn_lock_get(priv);
710 	if (brightness < 0)
711 		return brightness;
712 
713 	return sysfs_emit(buf, "%d\n", brightness);
714 }
715 
fn_lock_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)716 static ssize_t fn_lock_store(struct device *dev,
717 			     struct device_attribute *attr,
718 			     const char *buf, size_t count)
719 {
720 	struct ideapad_private *priv = dev_get_drvdata(dev);
721 	bool state;
722 	int err;
723 
724 	err = kstrtobool(buf, &state);
725 	if (err)
726 		return err;
727 
728 	err = ideapad_fn_lock_set(priv, state);
729 	if (err)
730 		return err;
731 
732 	ideapad_fn_lock_led_notify(priv, state);
733 
734 	return count;
735 }
736 
737 static DEVICE_ATTR_RW(fn_lock);
738 
touchpad_show(struct device * dev,struct device_attribute * attr,char * buf)739 static ssize_t touchpad_show(struct device *dev,
740 			     struct device_attribute *attr,
741 			     char *buf)
742 {
743 	struct ideapad_private *priv = dev_get_drvdata(dev);
744 	unsigned long result = 0;
745 	int err;
746 
747 	scoped_guard(mutex, &priv->vpc_mutex) {
748 		err = read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &result);
749 		if (err)
750 			return err;
751 	}
752 
753 	priv->r_touchpad_val = result;
754 
755 	return sysfs_emit(buf, "%d\n", !!result);
756 }
757 
touchpad_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)758 static ssize_t touchpad_store(struct device *dev,
759 			      struct device_attribute *attr,
760 			      const char *buf, size_t count)
761 {
762 	struct ideapad_private *priv = dev_get_drvdata(dev);
763 	bool state;
764 	int err;
765 
766 	err = kstrtobool(buf, &state);
767 	if (err)
768 		return err;
769 
770 	scoped_guard(mutex, &priv->vpc_mutex) {
771 		err = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state);
772 		if (err)
773 			return err;
774 	}
775 
776 	priv->r_touchpad_val = state;
777 
778 	return count;
779 }
780 
781 static DEVICE_ATTR_RW(touchpad);
782 
usb_charging_show(struct device * dev,struct device_attribute * attr,char * buf)783 static ssize_t usb_charging_show(struct device *dev,
784 				 struct device_attribute *attr,
785 				 char *buf)
786 {
787 	struct ideapad_private *priv = dev_get_drvdata(dev);
788 	unsigned long hals;
789 	int err;
790 
791 	err = eval_hals(priv->adev->handle, &hals);
792 	if (err)
793 		return err;
794 
795 	return sysfs_emit(buf, "%d\n", !!test_bit(HALS_USB_CHARGING_STATE_BIT, &hals));
796 }
797 
usb_charging_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)798 static ssize_t usb_charging_store(struct device *dev,
799 				  struct device_attribute *attr,
800 				  const char *buf, size_t count)
801 {
802 	struct ideapad_private *priv = dev_get_drvdata(dev);
803 	bool state;
804 	int err;
805 
806 	err = kstrtobool(buf, &state);
807 	if (err)
808 		return err;
809 
810 	err = exec_sals(priv->adev->handle, state ? SALS_USB_CHARGING_ON : SALS_USB_CHARGING_OFF);
811 	if (err)
812 		return err;
813 
814 	return count;
815 }
816 
817 static DEVICE_ATTR_RW(usb_charging);
818 
819 static struct attribute *ideapad_attributes[] = {
820 	&dev_attr_camera_power.attr,
821 	&dev_attr_conservation_mode.attr,
822 	&dev_attr_fan_mode.attr,
823 	&dev_attr_fn_lock.attr,
824 	&dev_attr_touchpad.attr,
825 	&dev_attr_usb_charging.attr,
826 	NULL
827 };
828 
ideapad_is_visible(struct kobject * kobj,struct attribute * attr,int idx)829 static umode_t ideapad_is_visible(struct kobject *kobj,
830 				  struct attribute *attr,
831 				  int idx)
832 {
833 	struct device *dev = kobj_to_dev(kobj);
834 	struct ideapad_private *priv = dev_get_drvdata(dev);
835 	bool supported = true;
836 
837 	if (attr == &dev_attr_camera_power.attr)
838 		supported = test_bit(CFG_CAP_CAM_BIT, &priv->cfg);
839 	else if (attr == &dev_attr_conservation_mode.attr)
840 		supported = priv->features.conservation_mode;
841 	else if (attr == &dev_attr_fan_mode.attr)
842 		supported = priv->features.fan_mode;
843 	else if (attr == &dev_attr_fn_lock.attr)
844 		supported = priv->features.fn_lock;
845 	else if (attr == &dev_attr_touchpad.attr)
846 		supported = priv->features.touchpad_ctrl_via_ec;
847 	else if (attr == &dev_attr_usb_charging.attr)
848 		supported = priv->features.usb_charging;
849 
850 	return supported ? attr->mode : 0;
851 }
852 
853 static const struct attribute_group ideapad_attribute_group = {
854 	.is_visible = ideapad_is_visible,
855 	.attrs = ideapad_attributes
856 };
857 
858 /*
859  * DYTC Platform profile
860  */
861 #define DYTC_CMD_QUERY        0 /* To get DYTC status - enable/revision */
862 #define DYTC_CMD_SET          1 /* To enable/disable IC function mode */
863 #define DYTC_CMD_GET          2 /* To get current IC function and mode */
864 #define DYTC_CMD_RESET    0x1ff /* To reset back to default */
865 
866 #define DYTC_QUERY_ENABLE_BIT 8  /* Bit        8 - 0 = disabled, 1 = enabled */
867 #define DYTC_QUERY_SUBREV_BIT 16 /* Bits 16 - 27 - sub revision */
868 #define DYTC_QUERY_REV_BIT    28 /* Bits 28 - 31 - revision */
869 
870 #define DYTC_GET_FUNCTION_BIT 8  /* Bits  8-11 - function setting */
871 #define DYTC_GET_MODE_BIT     12 /* Bits 12-15 - mode setting */
872 
873 #define DYTC_SET_FUNCTION_BIT 12 /* Bits 12-15 - function setting */
874 #define DYTC_SET_MODE_BIT     16 /* Bits 16-19 - mode setting */
875 #define DYTC_SET_VALID_BIT    20 /* Bit     20 - 1 = on, 0 = off */
876 
877 #define DYTC_FUNCTION_STD     0  /* Function = 0, standard mode */
878 #define DYTC_FUNCTION_CQL     1  /* Function = 1, lap mode */
879 #define DYTC_FUNCTION_MMC     11 /* Function = 11, desk mode */
880 
881 #define DYTC_MODE_PERFORM     2  /* High power mode aka performance */
882 #define DYTC_MODE_LOW_POWER       3  /* Low power mode aka quiet */
883 #define DYTC_MODE_BALANCE   0xF  /* Default mode aka balanced */
884 
885 #define DYTC_SET_COMMAND(function, mode, on) \
886 	(DYTC_CMD_SET | (function) << DYTC_SET_FUNCTION_BIT | \
887 	 (mode) << DYTC_SET_MODE_BIT | \
888 	 (on) << DYTC_SET_VALID_BIT)
889 
890 #define DYTC_DISABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_BALANCE, 0)
891 
892 #define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_BALANCE, 1)
893 
convert_dytc_to_profile(int dytcmode,enum platform_profile_option * profile)894 static int convert_dytc_to_profile(int dytcmode, enum platform_profile_option *profile)
895 {
896 	switch (dytcmode) {
897 	case DYTC_MODE_LOW_POWER:
898 		*profile = PLATFORM_PROFILE_LOW_POWER;
899 		break;
900 	case DYTC_MODE_BALANCE:
901 		*profile =  PLATFORM_PROFILE_BALANCED;
902 		break;
903 	case DYTC_MODE_PERFORM:
904 		*profile =  PLATFORM_PROFILE_PERFORMANCE;
905 		break;
906 	default: /* Unknown mode */
907 		return -EINVAL;
908 	}
909 
910 	return 0;
911 }
912 
convert_profile_to_dytc(enum platform_profile_option profile,int * perfmode)913 static int convert_profile_to_dytc(enum platform_profile_option profile, int *perfmode)
914 {
915 	switch (profile) {
916 	case PLATFORM_PROFILE_LOW_POWER:
917 		*perfmode = DYTC_MODE_LOW_POWER;
918 		break;
919 	case PLATFORM_PROFILE_BALANCED:
920 		*perfmode = DYTC_MODE_BALANCE;
921 		break;
922 	case PLATFORM_PROFILE_PERFORMANCE:
923 		*perfmode = DYTC_MODE_PERFORM;
924 		break;
925 	default: /* Unknown profile */
926 		return -EOPNOTSUPP;
927 	}
928 
929 	return 0;
930 }
931 
932 /*
933  * dytc_profile_get: Function to register with platform_profile
934  * handler. Returns current platform profile.
935  */
dytc_profile_get(struct device * dev,enum platform_profile_option * profile)936 static int dytc_profile_get(struct device *dev,
937 			    enum platform_profile_option *profile)
938 {
939 	struct ideapad_dytc_priv *dytc = dev_get_drvdata(dev);
940 
941 	*profile = dytc->current_profile;
942 	return 0;
943 }
944 
945 /*
946  * Helper function - check if we are in CQL mode and if we are
947  *  - disable CQL,
948  *  - run the command
949  *  - enable CQL
950  *  If not in CQL mode, just run the command
951  */
dytc_cql_command(struct ideapad_private * priv,unsigned long cmd,unsigned long * output)952 static int dytc_cql_command(struct ideapad_private *priv, unsigned long cmd,
953 			    unsigned long *output)
954 {
955 	int err, cmd_err, cur_funcmode;
956 
957 	/* Determine if we are in CQL mode. This alters the commands we do */
958 	err = eval_dytc(priv->adev->handle, DYTC_CMD_GET, output);
959 	if (err)
960 		return err;
961 
962 	cur_funcmode = (*output >> DYTC_GET_FUNCTION_BIT) & 0xF;
963 	/* Check if we're OK to return immediately */
964 	if (cmd == DYTC_CMD_GET && cur_funcmode != DYTC_FUNCTION_CQL)
965 		return 0;
966 
967 	if (cur_funcmode == DYTC_FUNCTION_CQL) {
968 		err = eval_dytc(priv->adev->handle, DYTC_DISABLE_CQL, NULL);
969 		if (err)
970 			return err;
971 	}
972 
973 	cmd_err = eval_dytc(priv->adev->handle, cmd, output);
974 	/* Check return condition after we've restored CQL state */
975 
976 	if (cur_funcmode == DYTC_FUNCTION_CQL) {
977 		err = eval_dytc(priv->adev->handle, DYTC_ENABLE_CQL, NULL);
978 		if (err)
979 			return err;
980 	}
981 
982 	return cmd_err;
983 }
984 
985 /*
986  * dytc_profile_set: Function to register with platform_profile
987  * handler. Sets current platform profile.
988  */
dytc_profile_set(struct device * dev,enum platform_profile_option profile)989 static int dytc_profile_set(struct device *dev,
990 			    enum platform_profile_option profile)
991 {
992 	struct ideapad_dytc_priv *dytc = dev_get_drvdata(dev);
993 	struct ideapad_private *priv = dytc->priv;
994 	unsigned long output;
995 	int err;
996 
997 	scoped_guard(mutex_intr, &dytc->mutex) {
998 		if (profile == PLATFORM_PROFILE_BALANCED) {
999 			/* To get back to balanced mode we just issue a reset command */
1000 			err = eval_dytc(priv->adev->handle, DYTC_CMD_RESET, NULL);
1001 			if (err)
1002 				return err;
1003 		} else {
1004 			int perfmode;
1005 
1006 			err = convert_profile_to_dytc(profile, &perfmode);
1007 			if (err)
1008 				return err;
1009 
1010 			/* Determine if we are in CQL mode. This alters the commands we do */
1011 			err = dytc_cql_command(priv,
1012 					       DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1),
1013 					       &output);
1014 			if (err)
1015 				return err;
1016 		}
1017 
1018 		/* Success - update current profile */
1019 		dytc->current_profile = profile;
1020 		return 0;
1021 	}
1022 
1023 	return -EINTR;
1024 }
1025 
dytc_profile_probe(void * drvdata,unsigned long * choices)1026 static int dytc_profile_probe(void *drvdata, unsigned long *choices)
1027 {
1028 	set_bit(PLATFORM_PROFILE_LOW_POWER, choices);
1029 	set_bit(PLATFORM_PROFILE_BALANCED, choices);
1030 	set_bit(PLATFORM_PROFILE_PERFORMANCE, choices);
1031 
1032 	return 0;
1033 }
1034 
dytc_profile_refresh(struct ideapad_private * priv)1035 static void dytc_profile_refresh(struct ideapad_private *priv)
1036 {
1037 	enum platform_profile_option profile;
1038 	unsigned long output;
1039 	int err, perfmode;
1040 
1041 	scoped_guard(mutex, &priv->dytc->mutex)
1042 		err = dytc_cql_command(priv, DYTC_CMD_GET, &output);
1043 	if (err)
1044 		return;
1045 
1046 	perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF;
1047 
1048 	if (convert_dytc_to_profile(perfmode, &profile))
1049 		return;
1050 
1051 	if (profile != priv->dytc->current_profile) {
1052 		priv->dytc->current_profile = profile;
1053 		platform_profile_notify(priv->dytc->ppdev);
1054 	}
1055 }
1056 
1057 static const struct dmi_system_id ideapad_dytc_v4_allow_table[] = {
1058 	{
1059 		/* Ideapad 5 Pro 16ACH6 */
1060 		.matches = {
1061 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1062 			DMI_MATCH(DMI_PRODUCT_NAME, "82L5")
1063 		}
1064 	},
1065 	{
1066 		/* Ideapad 5 15ITL05 */
1067 		.matches = {
1068 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1069 			DMI_MATCH(DMI_PRODUCT_VERSION, "IdeaPad 5 15ITL05")
1070 		}
1071 	},
1072 	{}
1073 };
1074 
1075 static const struct platform_profile_ops dytc_profile_ops = {
1076 	.probe = dytc_profile_probe,
1077 	.profile_get = dytc_profile_get,
1078 	.profile_set = dytc_profile_set,
1079 };
1080 
ideapad_dytc_profile_init(struct ideapad_private * priv)1081 static int ideapad_dytc_profile_init(struct ideapad_private *priv)
1082 {
1083 	int err, dytc_version;
1084 	unsigned long output;
1085 
1086 	if (!priv->features.dytc)
1087 		return -ENODEV;
1088 
1089 	err = eval_dytc(priv->adev->handle, DYTC_CMD_QUERY, &output);
1090 	/* For all other errors we can flag the failure */
1091 	if (err)
1092 		return err;
1093 
1094 	/* Check DYTC is enabled and supports mode setting */
1095 	if (!test_bit(DYTC_QUERY_ENABLE_BIT, &output)) {
1096 		dev_info(&priv->platform_device->dev, "DYTC_QUERY_ENABLE_BIT returned false\n");
1097 		return -ENODEV;
1098 	}
1099 
1100 	dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
1101 
1102 	if (dytc_version < 4) {
1103 		dev_info(&priv->platform_device->dev, "DYTC_VERSION < 4 is not supported\n");
1104 		return -ENODEV;
1105 	}
1106 
1107 	if (dytc_version < 5 &&
1108 	    !(allow_v4_dytc || dmi_check_system(ideapad_dytc_v4_allow_table))) {
1109 		dev_info(&priv->platform_device->dev,
1110 			 "DYTC_VERSION 4 support may not work. Pass ideapad_laptop.allow_v4_dytc=Y on the kernel commandline to enable\n");
1111 		return -ENODEV;
1112 	}
1113 
1114 	priv->dytc = kzalloc(sizeof(*priv->dytc), GFP_KERNEL);
1115 	if (!priv->dytc)
1116 		return -ENOMEM;
1117 
1118 	mutex_init(&priv->dytc->mutex);
1119 
1120 	priv->dytc->priv = priv;
1121 
1122 	/* Create platform_profile structure and register */
1123 	priv->dytc->ppdev = devm_platform_profile_register(&priv->platform_device->dev,
1124 							   "ideapad-laptop", priv->dytc,
1125 							   &dytc_profile_ops);
1126 	if (IS_ERR(priv->dytc->ppdev)) {
1127 		err = PTR_ERR(priv->dytc->ppdev);
1128 		goto pp_reg_failed;
1129 	}
1130 
1131 	/* Ensure initial values are correct */
1132 	dytc_profile_refresh(priv);
1133 
1134 	return 0;
1135 
1136 pp_reg_failed:
1137 	mutex_destroy(&priv->dytc->mutex);
1138 	kfree(priv->dytc);
1139 	priv->dytc = NULL;
1140 
1141 	return err;
1142 }
1143 
ideapad_dytc_profile_exit(struct ideapad_private * priv)1144 static void ideapad_dytc_profile_exit(struct ideapad_private *priv)
1145 {
1146 	if (!priv->dytc)
1147 		return;
1148 
1149 	mutex_destroy(&priv->dytc->mutex);
1150 	kfree(priv->dytc);
1151 
1152 	priv->dytc = NULL;
1153 }
1154 
1155 /*
1156  * Rfkill
1157  */
1158 struct ideapad_rfk_data {
1159 	char *name;
1160 	int cfgbit;
1161 	int opcode;
1162 	int type;
1163 };
1164 
1165 static const struct ideapad_rfk_data ideapad_rfk_data[] = {
1166 	{ "ideapad_wlan",      CFG_CAP_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
1167 	{ "ideapad_bluetooth", CFG_CAP_BT_BIT,   VPCCMD_W_BT,   RFKILL_TYPE_BLUETOOTH },
1168 	{ "ideapad_3g",        CFG_CAP_3G_BIT,   VPCCMD_W_3G,   RFKILL_TYPE_WWAN },
1169 };
1170 
ideapad_rfk_set(void * data,bool blocked)1171 static int ideapad_rfk_set(void *data, bool blocked)
1172 {
1173 	struct ideapad_rfk_priv *priv = data;
1174 	int opcode = ideapad_rfk_data[priv->dev].opcode;
1175 
1176 	guard(mutex)(&priv->priv->vpc_mutex);
1177 
1178 	return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
1179 }
1180 
1181 static const struct rfkill_ops ideapad_rfk_ops = {
1182 	.set_block = ideapad_rfk_set,
1183 };
1184 
ideapad_sync_rfk_state(struct ideapad_private * priv)1185 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
1186 {
1187 	unsigned long hw_blocked = 0;
1188 	int i;
1189 
1190 	if (priv->features.hw_rfkill_switch) {
1191 		guard(mutex)(&priv->vpc_mutex);
1192 
1193 		if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
1194 			return;
1195 		hw_blocked = !hw_blocked;
1196 	}
1197 
1198 	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1199 		if (priv->rfk[i])
1200 			rfkill_set_hw_state(priv->rfk[i], hw_blocked);
1201 }
1202 
ideapad_register_rfkill(struct ideapad_private * priv,int dev)1203 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
1204 {
1205 	unsigned long rf_enabled;
1206 	int err;
1207 
1208 	if (no_bt_rfkill && ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH) {
1209 		/* Force to enable bluetooth when no_bt_rfkill=1 */
1210 		write_ec_cmd(priv->adev->handle, ideapad_rfk_data[dev].opcode, 1);
1211 		return 0;
1212 	}
1213 
1214 	priv->rfk_priv[dev].dev = dev;
1215 	priv->rfk_priv[dev].priv = priv;
1216 
1217 	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
1218 				      &priv->platform_device->dev,
1219 				      ideapad_rfk_data[dev].type,
1220 				      &ideapad_rfk_ops,
1221 				      &priv->rfk_priv[dev]);
1222 	if (!priv->rfk[dev])
1223 		return -ENOMEM;
1224 
1225 	err = read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode - 1, &rf_enabled);
1226 	if (err)
1227 		rf_enabled = 1;
1228 
1229 	rfkill_init_sw_state(priv->rfk[dev], !rf_enabled);
1230 
1231 	err = rfkill_register(priv->rfk[dev]);
1232 	if (err)
1233 		rfkill_destroy(priv->rfk[dev]);
1234 
1235 	return err;
1236 }
1237 
ideapad_unregister_rfkill(struct ideapad_private * priv,int dev)1238 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
1239 {
1240 	if (!priv->rfk[dev])
1241 		return;
1242 
1243 	rfkill_unregister(priv->rfk[dev]);
1244 	rfkill_destroy(priv->rfk[dev]);
1245 }
1246 
1247 /*
1248  * Platform device
1249  */
ideapad_sysfs_init(struct ideapad_private * priv)1250 static int ideapad_sysfs_init(struct ideapad_private *priv)
1251 {
1252 	return device_add_group(&priv->platform_device->dev,
1253 				&ideapad_attribute_group);
1254 }
1255 
ideapad_sysfs_exit(struct ideapad_private * priv)1256 static void ideapad_sysfs_exit(struct ideapad_private *priv)
1257 {
1258 	device_remove_group(&priv->platform_device->dev,
1259 			    &ideapad_attribute_group);
1260 }
1261 
1262 /*
1263  * input device
1264  */
1265 #define IDEAPAD_WMI_KEY 0x100
1266 
1267 static const struct key_entry ideapad_keymap[] = {
1268 	{ KE_KEY,   6, { KEY_SWITCHVIDEOMODE } },
1269 	{ KE_KEY,   7, { KEY_CAMERA } },
1270 	{ KE_KEY,   8, { KEY_MICMUTE } },
1271 	{ KE_KEY,  11, { KEY_F16 } },
1272 	{ KE_KEY,  13, { KEY_WLAN } },
1273 	{ KE_KEY,  16, { KEY_PROG1 } },
1274 	{ KE_KEY,  17, { KEY_PROG2 } },
1275 	{ KE_KEY,  64, { KEY_PROG3 } },
1276 	{ KE_KEY,  65, { KEY_PROG4 } },
1277 	{ KE_KEY,  66, { KEY_TOUCHPAD_OFF } },
1278 	{ KE_KEY,  67, { KEY_TOUCHPAD_ON } },
1279 	{ KE_KEY, 128, { KEY_ESC } },
1280 
1281 	/*
1282 	 * WMI keys
1283 	 */
1284 
1285 	/* FnLock (handled by the firmware) */
1286 	{ KE_IGNORE,	0x02 | IDEAPAD_WMI_KEY },
1287 	/* Esc (handled by the firmware) */
1288 	{ KE_IGNORE,	0x03 | IDEAPAD_WMI_KEY },
1289 	/* Customizable Lenovo Hotkey ("star" with 'S' inside) */
1290 	{ KE_KEY,	0x01 | IDEAPAD_WMI_KEY, { KEY_FAVORITES } },
1291 	{ KE_KEY,	0x04 | IDEAPAD_WMI_KEY, { KEY_SELECTIVE_SCREENSHOT } },
1292 	/* Lenovo Support */
1293 	{ KE_KEY,	0x07 | IDEAPAD_WMI_KEY, { KEY_HELP } },
1294 	{ KE_KEY,	0x0e | IDEAPAD_WMI_KEY, { KEY_PICKUP_PHONE } },
1295 	{ KE_KEY,	0x0f | IDEAPAD_WMI_KEY, { KEY_HANGUP_PHONE } },
1296 	/* Refresh Rate Toggle (Fn+R) */
1297 	{ KE_KEY,	0x10 | IDEAPAD_WMI_KEY, { KEY_REFRESH_RATE_TOGGLE } },
1298 	/* Dark mode toggle */
1299 	{ KE_KEY,	0x13 | IDEAPAD_WMI_KEY, { KEY_PROG1 } },
1300 	/* Sound profile switch */
1301 	{ KE_KEY,	0x12 | IDEAPAD_WMI_KEY, { KEY_PROG2 } },
1302 	/* Lenovo Virtual Background application */
1303 	{ KE_KEY,	0x28 | IDEAPAD_WMI_KEY, { KEY_PROG3 } },
1304 	/* Lenovo Support */
1305 	{ KE_KEY,	0x27 | IDEAPAD_WMI_KEY, { KEY_HELP } },
1306 	/* Refresh Rate Toggle */
1307 	{ KE_KEY,	0x0a | IDEAPAD_WMI_KEY, { KEY_REFRESH_RATE_TOGGLE } },
1308 	/* Specific to some newer models */
1309 	{ KE_KEY,	0x3e | IDEAPAD_WMI_KEY, { KEY_MICMUTE } },
1310 	{ KE_KEY,	0x3f | IDEAPAD_WMI_KEY, { KEY_RFKILL } },
1311 
1312 	{ KE_END },
1313 };
1314 
ideapad_input_init(struct ideapad_private * priv)1315 static int ideapad_input_init(struct ideapad_private *priv)
1316 {
1317 	struct input_dev *inputdev;
1318 	int err;
1319 
1320 	inputdev = input_allocate_device();
1321 	if (!inputdev)
1322 		return -ENOMEM;
1323 
1324 	inputdev->name = "Ideapad extra buttons";
1325 	inputdev->phys = "ideapad/input0";
1326 	inputdev->id.bustype = BUS_HOST;
1327 	inputdev->dev.parent = &priv->platform_device->dev;
1328 
1329 	err = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
1330 	if (err) {
1331 		dev_err(&priv->platform_device->dev,
1332 			"Could not set up input device keymap: %d\n", err);
1333 		goto err_free_dev;
1334 	}
1335 
1336 	err = input_register_device(inputdev);
1337 	if (err) {
1338 		dev_err(&priv->platform_device->dev,
1339 			"Could not register input device: %d\n", err);
1340 		goto err_free_dev;
1341 	}
1342 
1343 	priv->inputdev = inputdev;
1344 
1345 	return 0;
1346 
1347 err_free_dev:
1348 	input_free_device(inputdev);
1349 
1350 	return err;
1351 }
1352 
ideapad_input_exit(struct ideapad_private * priv)1353 static void ideapad_input_exit(struct ideapad_private *priv)
1354 {
1355 	input_unregister_device(priv->inputdev);
1356 	priv->inputdev = NULL;
1357 }
1358 
ideapad_input_report(struct ideapad_private * priv,unsigned long scancode)1359 static void ideapad_input_report(struct ideapad_private *priv,
1360 				 unsigned long scancode)
1361 {
1362 	sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
1363 }
1364 
ideapad_input_novokey(struct ideapad_private * priv)1365 static void ideapad_input_novokey(struct ideapad_private *priv)
1366 {
1367 	unsigned long long_pressed;
1368 
1369 	scoped_guard(mutex, &priv->vpc_mutex)
1370 		if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
1371 			return;
1372 
1373 	if (long_pressed)
1374 		ideapad_input_report(priv, 17);
1375 	else
1376 		ideapad_input_report(priv, 16);
1377 }
1378 
ideapad_check_special_buttons(struct ideapad_private * priv)1379 static void ideapad_check_special_buttons(struct ideapad_private *priv)
1380 {
1381 	unsigned long bit, value;
1382 
1383 	scoped_guard(mutex, &priv->vpc_mutex)
1384 		if (read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value))
1385 			return;
1386 
1387 	for_each_set_bit (bit, &value, 16) {
1388 		switch (bit) {
1389 		case 6:	/* Z570 */
1390 		case 0:	/* Z580 */
1391 			/* Thermal Management / Performance Mode button */
1392 			if (priv->dytc)
1393 				platform_profile_cycle();
1394 			else
1395 				ideapad_input_report(priv, 65);
1396 			break;
1397 		case 1:
1398 			/* OneKey Theater button */
1399 			ideapad_input_report(priv, 64);
1400 			break;
1401 		default:
1402 			dev_info(&priv->platform_device->dev,
1403 				 "Unknown special button: %lu\n", bit);
1404 			break;
1405 		}
1406 	}
1407 }
1408 
1409 /*
1410  * backlight
1411  */
ideapad_backlight_get_brightness(struct backlight_device * blightdev)1412 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
1413 {
1414 	struct ideapad_private *priv = bl_get_data(blightdev);
1415 	unsigned long now;
1416 	int err;
1417 
1418 	guard(mutex)(&priv->vpc_mutex);
1419 
1420 	err = read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
1421 	if (err)
1422 		return err;
1423 
1424 	return now;
1425 }
1426 
ideapad_backlight_update_status(struct backlight_device * blightdev)1427 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
1428 {
1429 	struct ideapad_private *priv = bl_get_data(blightdev);
1430 	int err;
1431 
1432 	guard(mutex)(&priv->vpc_mutex);
1433 
1434 	err = write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
1435 			   blightdev->props.brightness);
1436 	if (err)
1437 		return err;
1438 
1439 	err = write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
1440 			   blightdev->props.power != BACKLIGHT_POWER_OFF);
1441 	if (err)
1442 		return err;
1443 
1444 	return 0;
1445 }
1446 
1447 static const struct backlight_ops ideapad_backlight_ops = {
1448 	.get_brightness = ideapad_backlight_get_brightness,
1449 	.update_status = ideapad_backlight_update_status,
1450 };
1451 
ideapad_backlight_init(struct ideapad_private * priv)1452 static int ideapad_backlight_init(struct ideapad_private *priv)
1453 {
1454 	struct backlight_device *blightdev;
1455 	struct backlight_properties props;
1456 	unsigned long max, now, power;
1457 	int err;
1458 
1459 	err = read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max);
1460 	if (err)
1461 		return err;
1462 
1463 	err = read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
1464 	if (err)
1465 		return err;
1466 
1467 	err = read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power);
1468 	if (err)
1469 		return err;
1470 
1471 	memset(&props, 0, sizeof(props));
1472 
1473 	props.max_brightness = max;
1474 	props.type = BACKLIGHT_PLATFORM;
1475 
1476 	blightdev = backlight_device_register("ideapad",
1477 					      &priv->platform_device->dev,
1478 					      priv,
1479 					      &ideapad_backlight_ops,
1480 					      &props);
1481 	if (IS_ERR(blightdev)) {
1482 		err = PTR_ERR(blightdev);
1483 		dev_err(&priv->platform_device->dev,
1484 			"Could not register backlight device: %d\n", err);
1485 		return err;
1486 	}
1487 
1488 	priv->blightdev = blightdev;
1489 	blightdev->props.brightness = now;
1490 	blightdev->props.power = power ? BACKLIGHT_POWER_ON : BACKLIGHT_POWER_OFF;
1491 
1492 	backlight_update_status(blightdev);
1493 
1494 	return 0;
1495 }
1496 
ideapad_backlight_exit(struct ideapad_private * priv)1497 static void ideapad_backlight_exit(struct ideapad_private *priv)
1498 {
1499 	backlight_device_unregister(priv->blightdev);
1500 	priv->blightdev = NULL;
1501 }
1502 
ideapad_backlight_notify_power(struct ideapad_private * priv)1503 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
1504 {
1505 	struct backlight_device *blightdev = priv->blightdev;
1506 	unsigned long power;
1507 
1508 	if (!blightdev)
1509 		return;
1510 
1511 	guard(mutex)(&priv->vpc_mutex);
1512 
1513 	if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
1514 		return;
1515 
1516 	blightdev->props.power = power ? BACKLIGHT_POWER_ON : BACKLIGHT_POWER_OFF;
1517 }
1518 
ideapad_backlight_notify_brightness(struct ideapad_private * priv)1519 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
1520 {
1521 	unsigned long now;
1522 
1523 	/* if we control brightness via acpi video driver */
1524 	if (!priv->blightdev)
1525 		scoped_guard(mutex, &priv->vpc_mutex)
1526 			read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
1527 	else
1528 		backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
1529 }
1530 
1531 /*
1532  * keyboard backlight
1533  */
ideapad_kbd_bl_check_tristate(int type)1534 static int ideapad_kbd_bl_check_tristate(int type)
1535 {
1536 	return (type == KBD_BL_TRISTATE) || (type == KBD_BL_TRISTATE_AUTO);
1537 }
1538 
ideapad_kbd_bl_brightness_get(struct ideapad_private * priv)1539 static int ideapad_kbd_bl_brightness_get(struct ideapad_private *priv)
1540 {
1541 	unsigned long value;
1542 	int err;
1543 
1544 	if (ideapad_kbd_bl_check_tristate(priv->kbd_bl.type)) {
1545 		err = eval_kblc(priv->adev->handle,
1546 				FIELD_PREP(KBD_BL_COMMAND_TYPE, priv->kbd_bl.type) |
1547 				KBD_BL_COMMAND_GET,
1548 				&value);
1549 
1550 		if (err)
1551 			return err;
1552 
1553 		/* Convert returned value to brightness level */
1554 		value = FIELD_GET(KBD_BL_GET_BRIGHTNESS, value);
1555 
1556 		/* Off, low or high */
1557 		if (value <= priv->kbd_bl.led.max_brightness)
1558 			return value;
1559 
1560 		/* Auto, report as off */
1561 		if (value == priv->kbd_bl.led.max_brightness + 1)
1562 			return 0;
1563 
1564 		/* Unknown value */
1565 		dev_warn(&priv->platform_device->dev,
1566 			 "Unknown keyboard backlight value: %lu", value);
1567 		return -EINVAL;
1568 	}
1569 
1570 	err = eval_hals(priv->adev->handle, &value);
1571 	if (err)
1572 		return err;
1573 
1574 	return !!test_bit(HALS_KBD_BL_STATE_BIT, &value);
1575 }
1576 
ideapad_kbd_bl_led_cdev_brightness_get(struct led_classdev * led_cdev)1577 static enum led_brightness ideapad_kbd_bl_led_cdev_brightness_get(struct led_classdev *led_cdev)
1578 {
1579 	struct ideapad_private *priv = container_of(led_cdev, struct ideapad_private, kbd_bl.led);
1580 
1581 	return ideapad_kbd_bl_brightness_get(priv);
1582 }
1583 
ideapad_kbd_bl_brightness_set(struct ideapad_private * priv,unsigned int brightness)1584 static int ideapad_kbd_bl_brightness_set(struct ideapad_private *priv, unsigned int brightness)
1585 {
1586 	int err;
1587 	unsigned long value;
1588 	int type = priv->kbd_bl.type;
1589 
1590 	if (ideapad_kbd_bl_check_tristate(type)) {
1591 		if (brightness > priv->kbd_bl.led.max_brightness)
1592 			return -EINVAL;
1593 
1594 		value = FIELD_PREP(KBD_BL_SET_BRIGHTNESS, brightness) |
1595 			FIELD_PREP(KBD_BL_COMMAND_TYPE, type) |
1596 			KBD_BL_COMMAND_SET;
1597 		err = exec_kblc(priv->adev->handle, value);
1598 	} else {
1599 		err = exec_sals(priv->adev->handle, brightness ? SALS_KBD_BL_ON : SALS_KBD_BL_OFF);
1600 	}
1601 
1602 	if (err)
1603 		return err;
1604 
1605 	priv->kbd_bl.last_brightness = brightness;
1606 
1607 	return 0;
1608 }
1609 
ideapad_kbd_bl_led_cdev_brightness_set(struct led_classdev * led_cdev,enum led_brightness brightness)1610 static int ideapad_kbd_bl_led_cdev_brightness_set(struct led_classdev *led_cdev,
1611 						  enum led_brightness brightness)
1612 {
1613 	struct ideapad_private *priv = container_of(led_cdev, struct ideapad_private, kbd_bl.led);
1614 
1615 	return ideapad_kbd_bl_brightness_set(priv, brightness);
1616 }
1617 
ideapad_kbd_bl_notify(struct ideapad_private * priv)1618 static void ideapad_kbd_bl_notify(struct ideapad_private *priv)
1619 {
1620 	int brightness;
1621 
1622 	if (!priv->kbd_bl.initialized)
1623 		return;
1624 
1625 	brightness = ideapad_kbd_bl_brightness_get(priv);
1626 	if (brightness < 0)
1627 		return;
1628 
1629 	if (brightness == priv->kbd_bl.last_brightness)
1630 		return;
1631 
1632 	priv->kbd_bl.last_brightness = brightness;
1633 
1634 	led_classdev_notify_brightness_hw_changed(&priv->kbd_bl.led, brightness);
1635 }
1636 
ideapad_kbd_bl_init(struct ideapad_private * priv)1637 static int ideapad_kbd_bl_init(struct ideapad_private *priv)
1638 {
1639 	int brightness, err;
1640 
1641 	if (!priv->features.kbd_bl)
1642 		return -ENODEV;
1643 
1644 	if (WARN_ON(priv->kbd_bl.initialized))
1645 		return -EEXIST;
1646 
1647 	if (ideapad_kbd_bl_check_tristate(priv->kbd_bl.type)) {
1648 		priv->kbd_bl.led.max_brightness = 2;
1649 	} else {
1650 		priv->kbd_bl.led.max_brightness = 1;
1651 	}
1652 
1653 	brightness = ideapad_kbd_bl_brightness_get(priv);
1654 	if (brightness < 0)
1655 		return brightness;
1656 
1657 	priv->kbd_bl.last_brightness = brightness;
1658 	priv->kbd_bl.led.name                    = "platform::" LED_FUNCTION_KBD_BACKLIGHT;
1659 	priv->kbd_bl.led.brightness_get          = ideapad_kbd_bl_led_cdev_brightness_get;
1660 	priv->kbd_bl.led.brightness_set_blocking = ideapad_kbd_bl_led_cdev_brightness_set;
1661 	priv->kbd_bl.led.flags                   = LED_BRIGHT_HW_CHANGED;
1662 
1663 	err = led_classdev_register(&priv->platform_device->dev, &priv->kbd_bl.led);
1664 	if (err)
1665 		return err;
1666 
1667 	priv->kbd_bl.initialized = true;
1668 
1669 	return 0;
1670 }
1671 
ideapad_kbd_bl_exit(struct ideapad_private * priv)1672 static void ideapad_kbd_bl_exit(struct ideapad_private *priv)
1673 {
1674 	if (!priv->kbd_bl.initialized)
1675 		return;
1676 
1677 	priv->kbd_bl.initialized = false;
1678 
1679 	led_classdev_unregister(&priv->kbd_bl.led);
1680 }
1681 
1682 /*
1683  * FnLock LED
1684  */
ideapad_fn_lock_led_cdev_get(struct led_classdev * led_cdev)1685 static enum led_brightness ideapad_fn_lock_led_cdev_get(struct led_classdev *led_cdev)
1686 {
1687 	struct ideapad_private *priv = container_of(led_cdev, struct ideapad_private, fn_lock.led);
1688 
1689 	return ideapad_fn_lock_get(priv);
1690 }
1691 
ideapad_fn_lock_led_cdev_set(struct led_classdev * led_cdev,enum led_brightness brightness)1692 static int ideapad_fn_lock_led_cdev_set(struct led_classdev *led_cdev,
1693 	enum led_brightness brightness)
1694 {
1695 	struct ideapad_private *priv = container_of(led_cdev, struct ideapad_private, fn_lock.led);
1696 
1697 	return ideapad_fn_lock_set(priv, brightness);
1698 }
1699 
ideapad_fn_lock_led_init(struct ideapad_private * priv)1700 static int ideapad_fn_lock_led_init(struct ideapad_private *priv)
1701 {
1702 	int brightness, err;
1703 
1704 	if (!priv->features.fn_lock)
1705 		return -ENODEV;
1706 
1707 	if (WARN_ON(priv->fn_lock.initialized))
1708 		return -EEXIST;
1709 
1710 	priv->fn_lock.led.max_brightness = 1;
1711 
1712 	brightness = ideapad_fn_lock_get(priv);
1713 	if (brightness < 0)
1714 		return brightness;
1715 
1716 	priv->fn_lock.last_brightness = brightness;
1717 	priv->fn_lock.led.name                    = "platform::" LED_FUNCTION_FNLOCK;
1718 	priv->fn_lock.led.brightness_get          = ideapad_fn_lock_led_cdev_get;
1719 	priv->fn_lock.led.brightness_set_blocking = ideapad_fn_lock_led_cdev_set;
1720 	priv->fn_lock.led.flags                   = LED_BRIGHT_HW_CHANGED;
1721 
1722 	err = led_classdev_register(&priv->platform_device->dev, &priv->fn_lock.led);
1723 	if (err)
1724 		return err;
1725 
1726 	priv->fn_lock.initialized = true;
1727 
1728 	return 0;
1729 }
1730 
ideapad_fn_lock_led_exit(struct ideapad_private * priv)1731 static void ideapad_fn_lock_led_exit(struct ideapad_private *priv)
1732 {
1733 	if (!priv->fn_lock.initialized)
1734 		return;
1735 
1736 	priv->fn_lock.initialized = false;
1737 
1738 	led_classdev_unregister(&priv->fn_lock.led);
1739 }
1740 
1741 /*
1742  * module init/exit
1743  */
ideapad_sync_touchpad_state(struct ideapad_private * priv,bool send_events)1744 static void ideapad_sync_touchpad_state(struct ideapad_private *priv, bool send_events)
1745 {
1746 	unsigned long value;
1747 	unsigned char param;
1748 	int ret;
1749 
1750 	/* Without reading from EC touchpad LED doesn't switch state */
1751 	scoped_guard(mutex, &priv->vpc_mutex)
1752 		ret = read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value);
1753 	if (ret)
1754 		return;
1755 
1756 	/*
1757 	 * Some IdeaPads don't really turn off touchpad - they only
1758 	 * switch the LED state. We (de)activate KBC AUX port to turn
1759 	 * touchpad off and on. We send KEY_TOUCHPAD_OFF and
1760 	 * KEY_TOUCHPAD_ON to not to get out of sync with LED
1761 	 */
1762 	if (priv->features.ctrl_ps2_aux_port)
1763 		i8042_command(&param, value ? I8042_CMD_AUX_ENABLE : I8042_CMD_AUX_DISABLE);
1764 
1765 	/*
1766 	 * On older models the EC controls the touchpad and toggles it on/off
1767 	 * itself, in this case we report KEY_TOUCHPAD_ON/_OFF. Some models do
1768 	 * an acpi-notify with VPC bit 5 set on resume, so this function get
1769 	 * called with send_events=true on every resume. Therefor if the EC did
1770 	 * not toggle, do nothing to avoid sending spurious KEY_TOUCHPAD_TOGGLE.
1771 	 */
1772 	if (send_events && value != priv->r_touchpad_val) {
1773 		ideapad_input_report(priv, value ? 67 : 66);
1774 		sysfs_notify(&priv->platform_device->dev.kobj, NULL, "touchpad");
1775 	}
1776 
1777 	priv->r_touchpad_val = value;
1778 }
1779 
1780 static const struct dmi_system_id ymc_ec_trigger_quirk_dmi_table[] = {
1781 	{
1782 		/* Lenovo Yoga 7 14ARB7 */
1783 		.matches = {
1784 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1785 			DMI_MATCH(DMI_PRODUCT_NAME, "82QF"),
1786 		},
1787 	},
1788 	{
1789 		/* Lenovo Yoga 7 14ACN6 */
1790 		.matches = {
1791 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1792 			DMI_MATCH(DMI_PRODUCT_NAME, "82N7"),
1793 		},
1794 	},
1795 	{ }
1796 };
1797 
ideapad_laptop_trigger_ec(void)1798 static void ideapad_laptop_trigger_ec(void)
1799 {
1800 	struct ideapad_private *priv;
1801 	int ret;
1802 
1803 	guard(mutex)(&ideapad_shared_mutex);
1804 
1805 	priv = ideapad_shared;
1806 	if (!priv)
1807 		return;
1808 
1809 	if (!priv->features.ymc_ec_trigger)
1810 		return;
1811 
1812 	scoped_guard(mutex, &priv->vpc_mutex)
1813 		ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_YMC, 1);
1814 	if (ret)
1815 		dev_warn(&priv->platform_device->dev, "Could not write YMC: %d\n", ret);
1816 }
1817 
ideapad_laptop_nb_notify(struct notifier_block * nb,unsigned long action,void * data)1818 static int ideapad_laptop_nb_notify(struct notifier_block *nb,
1819 				    unsigned long action, void *data)
1820 {
1821 	switch (action) {
1822 	case IDEAPAD_LAPTOP_YMC_EVENT:
1823 		ideapad_laptop_trigger_ec();
1824 		break;
1825 	}
1826 
1827 	return 0;
1828 }
1829 
1830 static struct notifier_block ideapad_laptop_notifier = {
1831 	.notifier_call = ideapad_laptop_nb_notify,
1832 };
1833 
1834 static BLOCKING_NOTIFIER_HEAD(ideapad_laptop_chain_head);
1835 
ideapad_laptop_register_notifier(struct notifier_block * nb)1836 int ideapad_laptop_register_notifier(struct notifier_block *nb)
1837 {
1838 	return blocking_notifier_chain_register(&ideapad_laptop_chain_head, nb);
1839 }
1840 EXPORT_SYMBOL_NS_GPL(ideapad_laptop_register_notifier, "IDEAPAD_LAPTOP");
1841 
ideapad_laptop_unregister_notifier(struct notifier_block * nb)1842 int ideapad_laptop_unregister_notifier(struct notifier_block *nb)
1843 {
1844 	return blocking_notifier_chain_unregister(&ideapad_laptop_chain_head, nb);
1845 }
1846 EXPORT_SYMBOL_NS_GPL(ideapad_laptop_unregister_notifier, "IDEAPAD_LAPTOP");
1847 
ideapad_laptop_call_notifier(unsigned long action,void * data)1848 void ideapad_laptop_call_notifier(unsigned long action, void *data)
1849 {
1850 	blocking_notifier_call_chain(&ideapad_laptop_chain_head, action, data);
1851 }
1852 EXPORT_SYMBOL_NS_GPL(ideapad_laptop_call_notifier, "IDEAPAD_LAPTOP");
1853 
ideapad_acpi_notify(acpi_handle handle,u32 event,void * data)1854 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
1855 {
1856 	struct ideapad_private *priv = data;
1857 	unsigned long vpc1, vpc2, bit;
1858 
1859 	scoped_guard(mutex, &priv->vpc_mutex) {
1860 		if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
1861 			return;
1862 
1863 		if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
1864 			return;
1865 	}
1866 
1867 	vpc1 = (vpc2 << 8) | vpc1;
1868 
1869 	for_each_set_bit (bit, &vpc1, 16) {
1870 		switch (bit) {
1871 		case 13:
1872 		case 11:
1873 		case 8:
1874 		case 7:
1875 		case 6:
1876 			ideapad_input_report(priv, bit);
1877 			break;
1878 		case 10:
1879 			/*
1880 			 * This event gets send on a Yoga 300-11IBR when the EC
1881 			 * believes that the device has changed between laptop/
1882 			 * tent/stand/tablet mode. The EC relies on getting
1883 			 * angle info from 2 accelerometers through a special
1884 			 * windows service calling a DSM on the DUAL250E ACPI-
1885 			 * device. Linux does not do this, making the laptop/
1886 			 * tent/stand/tablet mode info unreliable, so we simply
1887 			 * ignore these events.
1888 			 */
1889 			break;
1890 		case 9:
1891 			ideapad_sync_rfk_state(priv);
1892 			break;
1893 		case 5:
1894 			ideapad_sync_touchpad_state(priv, true);
1895 			break;
1896 		case 4:
1897 			ideapad_backlight_notify_brightness(priv);
1898 			break;
1899 		case 3:
1900 			ideapad_input_novokey(priv);
1901 			break;
1902 		case 2:
1903 			ideapad_backlight_notify_power(priv);
1904 			break;
1905 		case KBD_BL_KBLC_CHANGED_EVENT:
1906 		case 1:
1907 			/*
1908 			 * Some IdeaPads report event 1 every ~20
1909 			 * seconds while on battery power; some
1910 			 * report this when changing to/from tablet
1911 			 * mode; some report this when the keyboard
1912 			 * backlight has changed.
1913 			 */
1914 			ideapad_kbd_bl_notify(priv);
1915 			break;
1916 		case 0:
1917 			ideapad_check_special_buttons(priv);
1918 			break;
1919 		default:
1920 			dev_info(&priv->platform_device->dev,
1921 				 "Unknown event: %lu\n", bit);
1922 		}
1923 	}
1924 }
1925 
1926 /* On some models we need to call exec_sals(SALS_FNLOCK_ON/OFF) to set the LED */
1927 static const struct dmi_system_id set_fn_lock_led_list[] = {
1928 	{
1929 		/* https://bugzilla.kernel.org/show_bug.cgi?id=212671 */
1930 		.matches = {
1931 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1932 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Legion R7000P2020H"),
1933 		}
1934 	},
1935 	{
1936 		.matches = {
1937 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1938 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Legion 5 15ARH05"),
1939 		}
1940 	},
1941 	{}
1942 };
1943 
1944 /*
1945  * Some ideapads have a hardware rfkill switch, but most do not have one.
1946  * Reading VPCCMD_R_RF always results in 0 on models without a hardware rfkill,
1947  * switch causing ideapad_laptop to wrongly report all radios as hw-blocked.
1948  * There used to be a long list of DMI ids for models without a hw rfkill
1949  * switch here, but that resulted in playing whack a mole.
1950  * More importantly wrongly reporting the wifi radio as hw-blocked, results in
1951  * non working wifi. Whereas not reporting it hw-blocked, when it actually is
1952  * hw-blocked results in an empty SSID list, which is a much more benign
1953  * failure mode.
1954  * So the default now is the much safer option of assuming there is no
1955  * hardware rfkill switch. This default also actually matches most hardware,
1956  * since having a hw rfkill switch is quite rare on modern hardware, so this
1957  * also leads to a much shorter list.
1958  */
1959 static const struct dmi_system_id hw_rfkill_list[] = {
1960 	{}
1961 };
1962 
1963 /*
1964  * On some models the EC toggles the touchpad muted LED on touchpad toggle
1965  * hotkey presses, but the EC does not actually disable the touchpad itself.
1966  * On these models the driver needs to explicitly enable/disable the i8042
1967  * (PS/2) aux port.
1968  */
1969 static const struct dmi_system_id ctrl_ps2_aux_port_list[] = {
1970 	{
1971 	/* Lenovo Ideapad Z570 */
1972 	.matches = {
1973 		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1974 		DMI_MATCH(DMI_PRODUCT_VERSION, "Ideapad Z570"),
1975 		},
1976 	},
1977 	{}
1978 };
1979 
ideapad_check_features(struct ideapad_private * priv)1980 static void ideapad_check_features(struct ideapad_private *priv)
1981 {
1982 	acpi_handle handle = priv->adev->handle;
1983 	unsigned long val;
1984 
1985 	priv->features.set_fn_lock_led =
1986 		set_fn_lock_led || dmi_check_system(set_fn_lock_led_list);
1987 	priv->features.hw_rfkill_switch =
1988 		hw_rfkill_switch || dmi_check_system(hw_rfkill_list);
1989 	priv->features.ctrl_ps2_aux_port =
1990 		ctrl_ps2_aux_port || dmi_check_system(ctrl_ps2_aux_port_list);
1991 	priv->features.touchpad_ctrl_via_ec = touchpad_ctrl_via_ec;
1992 	priv->features.ymc_ec_trigger =
1993 		ymc_ec_trigger || dmi_check_system(ymc_ec_trigger_quirk_dmi_table);
1994 
1995 	if (!read_ec_data(handle, VPCCMD_R_FAN, &val))
1996 		priv->features.fan_mode = true;
1997 
1998 	if (acpi_has_method(handle, "GBMD") && acpi_has_method(handle, "SBMC"))
1999 		priv->features.conservation_mode = true;
2000 
2001 	if (acpi_has_method(handle, "DYTC"))
2002 		priv->features.dytc = true;
2003 
2004 	if (acpi_has_method(handle, "HALS") && acpi_has_method(handle, "SALS")) {
2005 		if (!eval_hals(handle, &val)) {
2006 			if (test_bit(HALS_FNLOCK_SUPPORT_BIT, &val))
2007 				priv->features.fn_lock = true;
2008 
2009 			if (test_bit(HALS_KBD_BL_SUPPORT_BIT, &val)) {
2010 				priv->features.kbd_bl = true;
2011 				priv->kbd_bl.type = KBD_BL_STANDARD;
2012 			}
2013 
2014 			if (test_bit(HALS_USB_CHARGING_SUPPORT_BIT, &val))
2015 				priv->features.usb_charging = true;
2016 		}
2017 	}
2018 
2019 	if (acpi_has_method(handle, "KBLC")) {
2020 		if (!eval_kblc(priv->adev->handle, KBD_BL_QUERY_TYPE, &val)) {
2021 			if (val == KBD_BL_TRISTATE_TYPE) {
2022 				priv->features.kbd_bl = true;
2023 				priv->kbd_bl.type = KBD_BL_TRISTATE;
2024 			} else if (val == KBD_BL_TRISTATE_AUTO_TYPE) {
2025 				priv->features.kbd_bl = true;
2026 				priv->kbd_bl.type = KBD_BL_TRISTATE_AUTO;
2027 			} else {
2028 				dev_warn(&priv->platform_device->dev,
2029 					 "Unknown keyboard type: %lu",
2030 					 val);
2031 			}
2032 		}
2033 	}
2034 }
2035 
2036 #if IS_ENABLED(CONFIG_ACPI_WMI)
2037 /*
2038  * WMI driver
2039  */
2040 enum ideapad_wmi_event_type {
2041 	IDEAPAD_WMI_EVENT_ESC,
2042 	IDEAPAD_WMI_EVENT_FN_KEYS,
2043 };
2044 
2045 struct ideapad_wmi_private {
2046 	enum ideapad_wmi_event_type event;
2047 };
2048 
ideapad_wmi_probe(struct wmi_device * wdev,const void * context)2049 static int ideapad_wmi_probe(struct wmi_device *wdev, const void *context)
2050 {
2051 	struct ideapad_wmi_private *wpriv;
2052 
2053 	wpriv = devm_kzalloc(&wdev->dev, sizeof(*wpriv), GFP_KERNEL);
2054 	if (!wpriv)
2055 		return -ENOMEM;
2056 
2057 	*wpriv = *(const struct ideapad_wmi_private *)context;
2058 
2059 	dev_set_drvdata(&wdev->dev, wpriv);
2060 	return 0;
2061 }
2062 
ideapad_wmi_notify(struct wmi_device * wdev,union acpi_object * data)2063 static void ideapad_wmi_notify(struct wmi_device *wdev, union acpi_object *data)
2064 {
2065 	struct ideapad_wmi_private *wpriv = dev_get_drvdata(&wdev->dev);
2066 	struct ideapad_private *priv;
2067 
2068 	guard(mutex)(&ideapad_shared_mutex);
2069 
2070 	priv = ideapad_shared;
2071 	if (!priv)
2072 		return;
2073 
2074 	switch (wpriv->event) {
2075 	case IDEAPAD_WMI_EVENT_ESC:
2076 		ideapad_input_report(priv, 128);
2077 		break;
2078 	case IDEAPAD_WMI_EVENT_FN_KEYS:
2079 		if (priv->features.set_fn_lock_led) {
2080 			int brightness = ideapad_fn_lock_get(priv);
2081 
2082 			if (brightness >= 0) {
2083 				ideapad_fn_lock_set(priv, brightness);
2084 				ideapad_fn_lock_led_notify(priv, brightness);
2085 			}
2086 		}
2087 
2088 		if (data->type != ACPI_TYPE_INTEGER) {
2089 			dev_warn(&wdev->dev,
2090 				 "WMI event data is not an integer\n");
2091 			break;
2092 		}
2093 
2094 		dev_dbg(&wdev->dev, "WMI fn-key event: 0x%llx\n",
2095 			data->integer.value);
2096 
2097 		/* 0x02 FnLock, 0x03 Esc */
2098 		if (data->integer.value == 0x02 || data->integer.value == 0x03)
2099 			ideapad_fn_lock_led_notify(priv, data->integer.value == 0x02);
2100 
2101 		ideapad_input_report(priv,
2102 				     data->integer.value | IDEAPAD_WMI_KEY);
2103 
2104 		break;
2105 	}
2106 }
2107 
2108 static const struct ideapad_wmi_private ideapad_wmi_context_esc = {
2109 	.event = IDEAPAD_WMI_EVENT_ESC
2110 };
2111 
2112 static const struct ideapad_wmi_private ideapad_wmi_context_fn_keys = {
2113 	.event = IDEAPAD_WMI_EVENT_FN_KEYS
2114 };
2115 
2116 static const struct wmi_device_id ideapad_wmi_ids[] = {
2117 	{ "26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", &ideapad_wmi_context_esc }, /* Yoga 3 */
2118 	{ "56322276-8493-4CE8-A783-98C991274F5E", &ideapad_wmi_context_esc }, /* Yoga 700 */
2119 	{ "8FC0DE0C-B4E4-43FD-B0F3-8871711C1294", &ideapad_wmi_context_fn_keys }, /* Legion 5 */
2120 	{},
2121 };
2122 MODULE_DEVICE_TABLE(wmi, ideapad_wmi_ids);
2123 
2124 static struct wmi_driver ideapad_wmi_driver = {
2125 	.driver = {
2126 		.name = "ideapad_wmi",
2127 	},
2128 	.id_table = ideapad_wmi_ids,
2129 	.probe = ideapad_wmi_probe,
2130 	.notify = ideapad_wmi_notify,
2131 };
2132 
ideapad_wmi_driver_register(void)2133 static int ideapad_wmi_driver_register(void)
2134 {
2135 	return wmi_driver_register(&ideapad_wmi_driver);
2136 }
2137 
ideapad_wmi_driver_unregister(void)2138 static void ideapad_wmi_driver_unregister(void)
2139 {
2140 	return wmi_driver_unregister(&ideapad_wmi_driver);
2141 }
2142 
2143 #else
ideapad_wmi_driver_register(void)2144 static inline int ideapad_wmi_driver_register(void) { return 0; }
ideapad_wmi_driver_unregister(void)2145 static inline void ideapad_wmi_driver_unregister(void) { }
2146 #endif
2147 
2148 /*
2149  * ACPI driver
2150  */
ideapad_acpi_add(struct platform_device * pdev)2151 static int ideapad_acpi_add(struct platform_device *pdev)
2152 {
2153 	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
2154 	struct ideapad_private *priv;
2155 	acpi_status status;
2156 	unsigned long cfg;
2157 	int err, i;
2158 
2159 	if (!adev || eval_int(adev->handle, "_CFG", &cfg))
2160 		return -ENODEV;
2161 
2162 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
2163 	if (!priv)
2164 		return -ENOMEM;
2165 
2166 	dev_set_drvdata(&pdev->dev, priv);
2167 
2168 	priv->cfg = cfg;
2169 	priv->adev = adev;
2170 	priv->platform_device = pdev;
2171 
2172 	err = devm_mutex_init(&pdev->dev, &priv->vpc_mutex);
2173 	if (err)
2174 		return err;
2175 
2176 	ideapad_check_features(priv);
2177 
2178 	err = ideapad_sysfs_init(priv);
2179 	if (err)
2180 		return err;
2181 
2182 	ideapad_debugfs_init(priv);
2183 
2184 	err = ideapad_input_init(priv);
2185 	if (err)
2186 		goto input_failed;
2187 
2188 	err = ideapad_kbd_bl_init(priv);
2189 	if (err) {
2190 		if (err != -ENODEV)
2191 			dev_warn(&pdev->dev, "Could not set up keyboard backlight LED: %d\n", err);
2192 		else
2193 			dev_info(&pdev->dev, "Keyboard backlight control not available\n");
2194 	}
2195 
2196 	err = ideapad_fn_lock_led_init(priv);
2197 	if (err) {
2198 		if (err != -ENODEV)
2199 			dev_warn(&pdev->dev, "Could not set up FnLock LED: %d\n", err);
2200 		else
2201 			dev_info(&pdev->dev, "FnLock control not available\n");
2202 	}
2203 
2204 	/*
2205 	 * On some models without a hw-switch (the yoga 2 13 at least)
2206 	 * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
2207 	 */
2208 	if (!priv->features.hw_rfkill_switch)
2209 		write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
2210 
2211 	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
2212 		if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
2213 			ideapad_register_rfkill(priv, i);
2214 
2215 	ideapad_sync_rfk_state(priv);
2216 	ideapad_sync_touchpad_state(priv, false);
2217 
2218 	err = ideapad_dytc_profile_init(priv);
2219 	if (err) {
2220 		if (err != -ENODEV)
2221 			dev_warn(&pdev->dev, "Could not set up DYTC interface: %d\n", err);
2222 		else
2223 			dev_info(&pdev->dev, "DYTC interface is not available\n");
2224 	}
2225 
2226 	if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
2227 		err = ideapad_backlight_init(priv);
2228 		if (err && err != -ENODEV)
2229 			goto backlight_failed;
2230 	}
2231 
2232 	status = acpi_install_notify_handler(adev->handle,
2233 					     ACPI_DEVICE_NOTIFY,
2234 					     ideapad_acpi_notify, priv);
2235 	if (ACPI_FAILURE(status)) {
2236 		err = -EIO;
2237 		goto notification_failed;
2238 	}
2239 
2240 	err = ideapad_shared_init(priv);
2241 	if (err)
2242 		goto shared_init_failed;
2243 
2244 	ideapad_laptop_register_notifier(&ideapad_laptop_notifier);
2245 
2246 	return 0;
2247 
2248 shared_init_failed:
2249 	acpi_remove_notify_handler(priv->adev->handle,
2250 				   ACPI_DEVICE_NOTIFY,
2251 				   ideapad_acpi_notify);
2252 
2253 notification_failed:
2254 	ideapad_backlight_exit(priv);
2255 
2256 backlight_failed:
2257 	ideapad_dytc_profile_exit(priv);
2258 
2259 	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
2260 		ideapad_unregister_rfkill(priv, i);
2261 
2262 	ideapad_fn_lock_led_exit(priv);
2263 	ideapad_kbd_bl_exit(priv);
2264 	ideapad_input_exit(priv);
2265 
2266 input_failed:
2267 	ideapad_debugfs_exit(priv);
2268 	ideapad_sysfs_exit(priv);
2269 
2270 	return err;
2271 }
2272 
ideapad_acpi_remove(struct platform_device * pdev)2273 static void ideapad_acpi_remove(struct platform_device *pdev)
2274 {
2275 	struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
2276 	int i;
2277 
2278 	ideapad_laptop_unregister_notifier(&ideapad_laptop_notifier);
2279 
2280 	ideapad_shared_exit(priv);
2281 
2282 	acpi_remove_notify_handler(priv->adev->handle,
2283 				   ACPI_DEVICE_NOTIFY,
2284 				   ideapad_acpi_notify);
2285 
2286 	ideapad_backlight_exit(priv);
2287 	ideapad_dytc_profile_exit(priv);
2288 
2289 	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
2290 		ideapad_unregister_rfkill(priv, i);
2291 
2292 	ideapad_fn_lock_led_exit(priv);
2293 	ideapad_kbd_bl_exit(priv);
2294 	ideapad_input_exit(priv);
2295 	ideapad_debugfs_exit(priv);
2296 	ideapad_sysfs_exit(priv);
2297 }
2298 
2299 #ifdef CONFIG_PM_SLEEP
ideapad_acpi_resume(struct device * dev)2300 static int ideapad_acpi_resume(struct device *dev)
2301 {
2302 	struct ideapad_private *priv = dev_get_drvdata(dev);
2303 
2304 	ideapad_sync_rfk_state(priv);
2305 	ideapad_sync_touchpad_state(priv, false);
2306 
2307 	if (priv->dytc)
2308 		dytc_profile_refresh(priv);
2309 
2310 	return 0;
2311 }
2312 #endif
2313 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
2314 
2315 static const struct acpi_device_id ideapad_device_ids[] = {
2316 	{"VPC2004", 0},
2317 	{"", 0},
2318 };
2319 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
2320 
2321 static struct platform_driver ideapad_acpi_driver = {
2322 	.probe = ideapad_acpi_add,
2323 	.remove = ideapad_acpi_remove,
2324 	.driver = {
2325 		.name   = "ideapad_acpi",
2326 		.pm     = &ideapad_pm,
2327 		.acpi_match_table = ACPI_PTR(ideapad_device_ids),
2328 	},
2329 };
2330 
ideapad_laptop_init(void)2331 static int __init ideapad_laptop_init(void)
2332 {
2333 	int err;
2334 
2335 	err = ideapad_wmi_driver_register();
2336 	if (err)
2337 		return err;
2338 
2339 	err = platform_driver_register(&ideapad_acpi_driver);
2340 	if (err) {
2341 		ideapad_wmi_driver_unregister();
2342 		return err;
2343 	}
2344 
2345 	return 0;
2346 }
module_init(ideapad_laptop_init)2347 module_init(ideapad_laptop_init)
2348 
2349 static void __exit ideapad_laptop_exit(void)
2350 {
2351 	ideapad_wmi_driver_unregister();
2352 	platform_driver_unregister(&ideapad_acpi_driver);
2353 }
2354 module_exit(ideapad_laptop_exit)
2355 
2356 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
2357 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
2358 MODULE_LICENSE("GPL");
2359