1 /* 2 * thinkpad_acpi.c - ThinkPad ACPI Extras 3 * 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 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #define TPACPI_VERSION "0.25" 27 #define TPACPI_SYSFS_VERSION 0x020700 28 29 /* 30 * Changelog: 31 * 2007-10-20 changelog trimmed down 32 * 33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 34 * drivers/misc. 35 * 36 * 2006-11-22 0.13 new maintainer 37 * changelog now lives in git commit history, and will 38 * not be updated further in-file. 39 * 40 * 2005-03-17 0.11 support for 600e, 770x 41 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 42 * 43 * 2005-01-16 0.9 use MODULE_VERSION 44 * thanks to Henrik Brix Andersen <brix@gentoo.org> 45 * fix parameter passing on module loading 46 * thanks to Rusty Russell <rusty@rustcorp.com.au> 47 * thanks to Jim Radford <radford@blackbean.org> 48 * 2004-11-08 0.8 fix init error case, don't return from a macro 49 * thanks to Chris Wright <chrisw@osdl.org> 50 */ 51 52 #include <linux/kernel.h> 53 #include <linux/module.h> 54 #include <linux/init.h> 55 #include <linux/types.h> 56 #include <linux/string.h> 57 #include <linux/list.h> 58 #include <linux/mutex.h> 59 #include <linux/sched.h> 60 #include <linux/kthread.h> 61 #include <linux/freezer.h> 62 #include <linux/delay.h> 63 #include <linux/slab.h> 64 #include <linux/nvram.h> 65 #include <linux/proc_fs.h> 66 #include <linux/seq_file.h> 67 #include <linux/sysfs.h> 68 #include <linux/backlight.h> 69 #include <linux/fb.h> 70 #include <linux/platform_device.h> 71 #include <linux/hwmon.h> 72 #include <linux/hwmon-sysfs.h> 73 #include <linux/input.h> 74 #include <linux/leds.h> 75 #include <linux/rfkill.h> 76 #include <linux/dmi.h> 77 #include <linux/jiffies.h> 78 #include <linux/workqueue.h> 79 #include <linux/acpi.h> 80 #include <linux/pci_ids.h> 81 #include <linux/thinkpad_acpi.h> 82 #include <sound/core.h> 83 #include <sound/control.h> 84 #include <sound/initval.h> 85 #include <linux/uaccess.h> 86 #include <acpi/video.h> 87 88 /* ThinkPad CMOS commands */ 89 #define TP_CMOS_VOLUME_DOWN 0 90 #define TP_CMOS_VOLUME_UP 1 91 #define TP_CMOS_VOLUME_MUTE 2 92 #define TP_CMOS_BRIGHTNESS_UP 4 93 #define TP_CMOS_BRIGHTNESS_DOWN 5 94 #define TP_CMOS_THINKLIGHT_ON 12 95 #define TP_CMOS_THINKLIGHT_OFF 13 96 97 /* NVRAM Addresses */ 98 enum tp_nvram_addr { 99 TP_NVRAM_ADDR_HK2 = 0x57, 100 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 101 TP_NVRAM_ADDR_VIDEO = 0x59, 102 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 103 TP_NVRAM_ADDR_MIXER = 0x60, 104 }; 105 106 /* NVRAM bit masks */ 107 enum { 108 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 109 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 110 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 111 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 112 TP_NVRAM_MASK_THINKLIGHT = 0x10, 113 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 114 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 115 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 116 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 117 TP_NVRAM_MASK_MUTE = 0x40, 118 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 119 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 120 TP_NVRAM_POS_LEVEL_VOLUME = 0, 121 }; 122 123 /* Misc NVRAM-related */ 124 enum { 125 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 126 }; 127 128 /* ACPI HIDs */ 129 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 130 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 131 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID "LEN0268" 132 #define TPACPI_ACPI_EC_HID "PNP0C09" 133 134 /* Input IDs */ 135 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 136 #define TPACPI_HKEY_INPUT_VERSION 0x4101 137 138 /* ACPI \WGSV commands */ 139 enum { 140 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 141 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 142 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 143 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 144 }; 145 146 /* TP_ACPI_WGSV_GET_STATE bits */ 147 enum { 148 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 149 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 150 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 151 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 152 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 153 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 154 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 155 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 156 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 157 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 158 }; 159 160 /* HKEY events */ 161 enum tpacpi_hkey_event_t { 162 /* Hotkey-related */ 163 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 164 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 165 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 166 TP_HKEY_EV_KBD_LIGHT = 0x1012, /* Thinklight/kbd backlight */ 167 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 168 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 169 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 170 171 /* Reasons for waking up from S3/S4 */ 172 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 173 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 174 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 175 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 176 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 177 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 178 179 /* Auto-sleep after eject request */ 180 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 181 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 182 183 /* Misc bay events */ 184 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 185 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 186 or port replicator */ 187 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 188 dock or port replicator */ 189 190 /* User-interface events */ 191 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 192 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 193 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 194 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 195 TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016): 196 * enter/leave tablet mode 197 */ 198 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 199 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 200 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 201 202 /* Key-related user-interface events */ 203 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 204 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 205 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */ 206 207 /* Thermal events */ 208 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 209 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 210 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 211 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 212 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 213 214 /* AC-related events */ 215 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 216 217 /* Misc */ 218 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 219 }; 220 221 /**************************************************************************** 222 * Main driver 223 */ 224 225 #define TPACPI_NAME "thinkpad" 226 #define TPACPI_DESC "ThinkPad ACPI Extras" 227 #define TPACPI_FILE TPACPI_NAME "_acpi" 228 #define TPACPI_URL "http://ibm-acpi.sf.net/" 229 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 230 231 #define TPACPI_PROC_DIR "ibm" 232 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 233 #define TPACPI_DRVR_NAME TPACPI_FILE 234 #define TPACPI_DRVR_SHORTNAME "tpacpi" 235 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 236 237 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 238 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 239 240 #define TPACPI_MAX_ACPI_ARGS 3 241 242 /* Debugging printk groups */ 243 #define TPACPI_DBG_ALL 0xffff 244 #define TPACPI_DBG_DISCLOSETASK 0x8000 245 #define TPACPI_DBG_INIT 0x0001 246 #define TPACPI_DBG_EXIT 0x0002 247 #define TPACPI_DBG_RFKILL 0x0004 248 #define TPACPI_DBG_HKEY 0x0008 249 #define TPACPI_DBG_FAN 0x0010 250 #define TPACPI_DBG_BRGHT 0x0020 251 #define TPACPI_DBG_MIXER 0x0040 252 253 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 254 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 255 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 256 257 258 /**************************************************************************** 259 * Driver-wide structs and misc. variables 260 */ 261 262 struct ibm_struct; 263 264 struct tp_acpi_drv_struct { 265 const struct acpi_device_id *hid; 266 struct acpi_driver *driver; 267 268 void (*notify) (struct ibm_struct *, u32); 269 acpi_handle *handle; 270 u32 type; 271 struct acpi_device *device; 272 }; 273 274 struct ibm_struct { 275 char *name; 276 277 int (*read) (struct seq_file *); 278 int (*write) (char *); 279 void (*exit) (void); 280 void (*resume) (void); 281 void (*suspend) (void); 282 void (*shutdown) (void); 283 284 struct list_head all_drivers; 285 286 struct tp_acpi_drv_struct *acpi; 287 288 struct { 289 u8 acpi_driver_registered:1; 290 u8 acpi_notify_installed:1; 291 u8 proc_created:1; 292 u8 init_called:1; 293 u8 experimental:1; 294 } flags; 295 }; 296 297 struct ibm_init_struct { 298 char param[32]; 299 300 int (*init) (struct ibm_init_struct *); 301 umode_t base_procfs_mode; 302 struct ibm_struct *data; 303 }; 304 305 static struct { 306 u32 bluetooth:1; 307 u32 hotkey:1; 308 u32 hotkey_mask:1; 309 u32 hotkey_wlsw:1; 310 enum { 311 TP_HOTKEY_TABLET_NONE = 0, 312 TP_HOTKEY_TABLET_USES_MHKG, 313 /* X1 Yoga 2016, seen on BIOS N1FET44W */ 314 TP_HOTKEY_TABLET_USES_CMMD, 315 } hotkey_tablet; 316 u32 kbdlight:1; 317 u32 light:1; 318 u32 light_status:1; 319 u32 bright_acpimode:1; 320 u32 bright_unkfw:1; 321 u32 wan:1; 322 u32 uwb:1; 323 u32 fan_ctrl_status_undef:1; 324 u32 second_fan:1; 325 u32 beep_needs_two_args:1; 326 u32 mixer_no_level_control:1; 327 u32 input_device_registered:1; 328 u32 platform_drv_registered:1; 329 u32 platform_drv_attrs_registered:1; 330 u32 sensors_pdrv_registered:1; 331 u32 sensors_pdrv_attrs_registered:1; 332 u32 sensors_pdev_attrs_registered:1; 333 u32 hotkey_poll_active:1; 334 u32 has_adaptive_kbd:1; 335 } tp_features; 336 337 static struct { 338 u16 hotkey_mask_ff:1; 339 u16 volume_ctrl_forbidden:1; 340 } tp_warned; 341 342 struct thinkpad_id_data { 343 unsigned int vendor; /* ThinkPad vendor: 344 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 345 346 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 347 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 348 349 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 350 u16 ec_model; 351 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 352 u16 ec_release; 353 354 char *model_str; /* ThinkPad T43 */ 355 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 356 }; 357 static struct thinkpad_id_data thinkpad_id; 358 359 static enum { 360 TPACPI_LIFE_INIT = 0, 361 TPACPI_LIFE_RUNNING, 362 TPACPI_LIFE_EXITING, 363 } tpacpi_lifecycle; 364 365 static int experimental; 366 static u32 dbg_level; 367 368 static struct workqueue_struct *tpacpi_wq; 369 370 enum led_status_t { 371 TPACPI_LED_OFF = 0, 372 TPACPI_LED_ON, 373 TPACPI_LED_BLINK, 374 }; 375 376 /* tpacpi LED class */ 377 struct tpacpi_led_classdev { 378 struct led_classdev led_classdev; 379 int led; 380 }; 381 382 /* brightness level capabilities */ 383 static unsigned int bright_maxlvl; /* 0 = unknown */ 384 385 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 386 static int dbg_wlswemul; 387 static bool tpacpi_wlsw_emulstate; 388 static int dbg_bluetoothemul; 389 static bool tpacpi_bluetooth_emulstate; 390 static int dbg_wwanemul; 391 static bool tpacpi_wwan_emulstate; 392 static int dbg_uwbemul; 393 static bool tpacpi_uwb_emulstate; 394 #endif 395 396 397 /************************************************************************* 398 * Debugging helpers 399 */ 400 401 #define dbg_printk(a_dbg_level, format, arg...) \ 402 do { \ 403 if (dbg_level & (a_dbg_level)) \ 404 printk(KERN_DEBUG pr_fmt("%s: " format), \ 405 __func__, ##arg); \ 406 } while (0) 407 408 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 409 #define vdbg_printk dbg_printk 410 static const char *str_supported(int is_supported); 411 #else 412 static inline const char *str_supported(int is_supported) { return ""; } 413 #define vdbg_printk(a_dbg_level, format, arg...) \ 414 do { if (0) no_printk(format, ##arg); } while (0) 415 #endif 416 417 static void tpacpi_log_usertask(const char * const what) 418 { 419 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 420 what, task_tgid_vnr(current)); 421 } 422 423 #define tpacpi_disclose_usertask(what, format, arg...) \ 424 do { \ 425 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 426 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 427 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 428 what, task_tgid_vnr(current), ## arg); \ 429 } \ 430 } while (0) 431 432 /* 433 * Quirk handling helpers 434 * 435 * ThinkPad IDs and versions seen in the field so far 436 * are two-characters from the set [0-9A-Z], i.e. base 36. 437 * 438 * We use values well outside that range as specials. 439 */ 440 441 #define TPACPI_MATCH_ANY 0xffffU 442 #define TPACPI_MATCH_UNKNOWN 0U 443 444 /* TPID('1', 'Y') == 0x5931 */ 445 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 446 447 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 448 { .vendor = PCI_VENDOR_ID_IBM, \ 449 .bios = TPID(__id1, __id2), \ 450 .ec = TPACPI_MATCH_ANY, \ 451 .quirks = (__quirk) } 452 453 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 454 { .vendor = PCI_VENDOR_ID_LENOVO, \ 455 .bios = TPID(__id1, __id2), \ 456 .ec = TPACPI_MATCH_ANY, \ 457 .quirks = (__quirk) } 458 459 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 460 { .vendor = PCI_VENDOR_ID_LENOVO, \ 461 .bios = TPACPI_MATCH_ANY, \ 462 .ec = TPID(__id1, __id2), \ 463 .quirks = (__quirk) } 464 465 struct tpacpi_quirk { 466 unsigned int vendor; 467 u16 bios; 468 u16 ec; 469 unsigned long quirks; 470 }; 471 472 /** 473 * tpacpi_check_quirks() - search BIOS/EC version on a list 474 * @qlist: array of &struct tpacpi_quirk 475 * @qlist_size: number of elements in @qlist 476 * 477 * Iterates over a quirks list until one is found that matches the 478 * ThinkPad's vendor, BIOS and EC model. 479 * 480 * Returns 0 if nothing matches, otherwise returns the quirks field of 481 * the matching &struct tpacpi_quirk entry. 482 * 483 * The match criteria is: vendor, ec and bios much match. 484 */ 485 static unsigned long __init tpacpi_check_quirks( 486 const struct tpacpi_quirk *qlist, 487 unsigned int qlist_size) 488 { 489 while (qlist_size) { 490 if ((qlist->vendor == thinkpad_id.vendor || 491 qlist->vendor == TPACPI_MATCH_ANY) && 492 (qlist->bios == thinkpad_id.bios_model || 493 qlist->bios == TPACPI_MATCH_ANY) && 494 (qlist->ec == thinkpad_id.ec_model || 495 qlist->ec == TPACPI_MATCH_ANY)) 496 return qlist->quirks; 497 498 qlist_size--; 499 qlist++; 500 } 501 return 0; 502 } 503 504 static inline bool __pure __init tpacpi_is_lenovo(void) 505 { 506 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 507 } 508 509 static inline bool __pure __init tpacpi_is_ibm(void) 510 { 511 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 512 } 513 514 /**************************************************************************** 515 **************************************************************************** 516 * 517 * ACPI Helpers and device model 518 * 519 **************************************************************************** 520 ****************************************************************************/ 521 522 /************************************************************************* 523 * ACPI basic handles 524 */ 525 526 static acpi_handle root_handle; 527 static acpi_handle ec_handle; 528 529 #define TPACPI_HANDLE(object, parent, paths...) \ 530 static acpi_handle object##_handle; \ 531 static const acpi_handle * const object##_parent __initconst = \ 532 &parent##_handle; \ 533 static char *object##_paths[] __initdata = { paths } 534 535 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 536 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 537 538 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 539 /* T4x, X31, X40 */ 540 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 541 "\\CMS", /* R40, R40e */ 542 ); /* all others */ 543 544 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 545 "^HKEY", /* R30, R31 */ 546 "HKEY", /* all others */ 547 ); /* 570 */ 548 549 /************************************************************************* 550 * ACPI helpers 551 */ 552 553 static int acpi_evalf(acpi_handle handle, 554 int *res, char *method, char *fmt, ...) 555 { 556 char *fmt0 = fmt; 557 struct acpi_object_list params; 558 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 559 struct acpi_buffer result, *resultp; 560 union acpi_object out_obj; 561 acpi_status status; 562 va_list ap; 563 char res_type; 564 int success; 565 int quiet; 566 567 if (!*fmt) { 568 pr_err("acpi_evalf() called with empty format\n"); 569 return 0; 570 } 571 572 if (*fmt == 'q') { 573 quiet = 1; 574 fmt++; 575 } else 576 quiet = 0; 577 578 res_type = *(fmt++); 579 580 params.count = 0; 581 params.pointer = &in_objs[0]; 582 583 va_start(ap, fmt); 584 while (*fmt) { 585 char c = *(fmt++); 586 switch (c) { 587 case 'd': /* int */ 588 in_objs[params.count].integer.value = va_arg(ap, int); 589 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 590 break; 591 /* add more types as needed */ 592 default: 593 pr_err("acpi_evalf() called " 594 "with invalid format character '%c'\n", c); 595 va_end(ap); 596 return 0; 597 } 598 } 599 va_end(ap); 600 601 if (res_type != 'v') { 602 result.length = sizeof(out_obj); 603 result.pointer = &out_obj; 604 resultp = &result; 605 } else 606 resultp = NULL; 607 608 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 609 610 switch (res_type) { 611 case 'd': /* int */ 612 success = (status == AE_OK && 613 out_obj.type == ACPI_TYPE_INTEGER); 614 if (success && res) 615 *res = out_obj.integer.value; 616 break; 617 case 'v': /* void */ 618 success = status == AE_OK; 619 break; 620 /* add more types as needed */ 621 default: 622 pr_err("acpi_evalf() called " 623 "with invalid format character '%c'\n", res_type); 624 return 0; 625 } 626 627 if (!success && !quiet) 628 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 629 method, fmt0, acpi_format_exception(status)); 630 631 return success; 632 } 633 634 static int acpi_ec_read(int i, u8 *p) 635 { 636 int v; 637 638 if (ecrd_handle) { 639 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 640 return 0; 641 *p = v; 642 } else { 643 if (ec_read(i, p) < 0) 644 return 0; 645 } 646 647 return 1; 648 } 649 650 static int acpi_ec_write(int i, u8 v) 651 { 652 if (ecwr_handle) { 653 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 654 return 0; 655 } else { 656 if (ec_write(i, v) < 0) 657 return 0; 658 } 659 660 return 1; 661 } 662 663 static int issue_thinkpad_cmos_command(int cmos_cmd) 664 { 665 if (!cmos_handle) 666 return -ENXIO; 667 668 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 669 return -EIO; 670 671 return 0; 672 } 673 674 /************************************************************************* 675 * ACPI device model 676 */ 677 678 #define TPACPI_ACPIHANDLE_INIT(object) \ 679 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 680 object##_paths, ARRAY_SIZE(object##_paths)) 681 682 static void __init drv_acpi_handle_init(const char *name, 683 acpi_handle *handle, const acpi_handle parent, 684 char **paths, const int num_paths) 685 { 686 int i; 687 acpi_status status; 688 689 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 690 name); 691 692 for (i = 0; i < num_paths; i++) { 693 status = acpi_get_handle(parent, paths[i], handle); 694 if (ACPI_SUCCESS(status)) { 695 dbg_printk(TPACPI_DBG_INIT, 696 "Found ACPI handle %s for %s\n", 697 paths[i], name); 698 return; 699 } 700 } 701 702 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 703 name); 704 *handle = NULL; 705 } 706 707 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 708 u32 level, void *context, void **return_value) 709 { 710 struct acpi_device *dev; 711 if (!strcmp(context, "video")) { 712 if (acpi_bus_get_device(handle, &dev)) 713 return AE_OK; 714 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 715 return AE_OK; 716 } 717 718 *(acpi_handle *)return_value = handle; 719 720 return AE_CTRL_TERMINATE; 721 } 722 723 static void __init tpacpi_acpi_handle_locate(const char *name, 724 const char *hid, 725 acpi_handle *handle) 726 { 727 acpi_status status; 728 acpi_handle device_found; 729 730 BUG_ON(!name || !handle); 731 vdbg_printk(TPACPI_DBG_INIT, 732 "trying to locate ACPI handle for %s, using HID %s\n", 733 name, hid ? hid : "NULL"); 734 735 memset(&device_found, 0, sizeof(device_found)); 736 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 737 (void *)name, &device_found); 738 739 *handle = NULL; 740 741 if (ACPI_SUCCESS(status)) { 742 *handle = device_found; 743 dbg_printk(TPACPI_DBG_INIT, 744 "Found ACPI handle for %s\n", name); 745 } else { 746 vdbg_printk(TPACPI_DBG_INIT, 747 "Could not locate an ACPI handle for %s: %s\n", 748 name, acpi_format_exception(status)); 749 } 750 } 751 752 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 753 { 754 struct ibm_struct *ibm = data; 755 756 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 757 return; 758 759 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 760 return; 761 762 ibm->acpi->notify(ibm, event); 763 } 764 765 static int __init setup_acpi_notify(struct ibm_struct *ibm) 766 { 767 acpi_status status; 768 int rc; 769 770 BUG_ON(!ibm->acpi); 771 772 if (!*ibm->acpi->handle) 773 return 0; 774 775 vdbg_printk(TPACPI_DBG_INIT, 776 "setting up ACPI notify for %s\n", ibm->name); 777 778 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 779 if (rc < 0) { 780 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 781 return -ENODEV; 782 } 783 784 ibm->acpi->device->driver_data = ibm; 785 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 786 TPACPI_ACPI_EVENT_PREFIX, 787 ibm->name); 788 789 status = acpi_install_notify_handler(*ibm->acpi->handle, 790 ibm->acpi->type, dispatch_acpi_notify, ibm); 791 if (ACPI_FAILURE(status)) { 792 if (status == AE_ALREADY_EXISTS) { 793 pr_notice("another device driver is already " 794 "handling %s events\n", ibm->name); 795 } else { 796 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 797 ibm->name, acpi_format_exception(status)); 798 } 799 return -ENODEV; 800 } 801 ibm->flags.acpi_notify_installed = 1; 802 return 0; 803 } 804 805 static int __init tpacpi_device_add(struct acpi_device *device) 806 { 807 return 0; 808 } 809 810 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 811 { 812 int rc; 813 814 dbg_printk(TPACPI_DBG_INIT, 815 "registering %s as an ACPI driver\n", ibm->name); 816 817 BUG_ON(!ibm->acpi); 818 819 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 820 if (!ibm->acpi->driver) { 821 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 822 return -ENOMEM; 823 } 824 825 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 826 ibm->acpi->driver->ids = ibm->acpi->hid; 827 828 ibm->acpi->driver->ops.add = &tpacpi_device_add; 829 830 rc = acpi_bus_register_driver(ibm->acpi->driver); 831 if (rc < 0) { 832 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 833 ibm->name, rc); 834 kfree(ibm->acpi->driver); 835 ibm->acpi->driver = NULL; 836 } else if (!rc) 837 ibm->flags.acpi_driver_registered = 1; 838 839 return rc; 840 } 841 842 843 /**************************************************************************** 844 **************************************************************************** 845 * 846 * Procfs Helpers 847 * 848 **************************************************************************** 849 ****************************************************************************/ 850 851 static int dispatch_proc_show(struct seq_file *m, void *v) 852 { 853 struct ibm_struct *ibm = m->private; 854 855 if (!ibm || !ibm->read) 856 return -EINVAL; 857 return ibm->read(m); 858 } 859 860 static int dispatch_proc_open(struct inode *inode, struct file *file) 861 { 862 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 863 } 864 865 static ssize_t dispatch_proc_write(struct file *file, 866 const char __user *userbuf, 867 size_t count, loff_t *pos) 868 { 869 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 870 char *kernbuf; 871 int ret; 872 873 if (!ibm || !ibm->write) 874 return -EINVAL; 875 if (count > PAGE_SIZE - 2) 876 return -EINVAL; 877 878 kernbuf = kmalloc(count + 2, GFP_KERNEL); 879 if (!kernbuf) 880 return -ENOMEM; 881 882 if (copy_from_user(kernbuf, userbuf, count)) { 883 kfree(kernbuf); 884 return -EFAULT; 885 } 886 887 kernbuf[count] = 0; 888 strcat(kernbuf, ","); 889 ret = ibm->write(kernbuf); 890 if (ret == 0) 891 ret = count; 892 893 kfree(kernbuf); 894 895 return ret; 896 } 897 898 static const struct file_operations dispatch_proc_fops = { 899 .owner = THIS_MODULE, 900 .open = dispatch_proc_open, 901 .read = seq_read, 902 .llseek = seq_lseek, 903 .release = single_release, 904 .write = dispatch_proc_write, 905 }; 906 907 static char *next_cmd(char **cmds) 908 { 909 char *start = *cmds; 910 char *end; 911 912 while ((end = strchr(start, ',')) && end == start) 913 start = end + 1; 914 915 if (!end) 916 return NULL; 917 918 *end = 0; 919 *cmds = end + 1; 920 return start; 921 } 922 923 924 /**************************************************************************** 925 **************************************************************************** 926 * 927 * Device model: input, hwmon and platform 928 * 929 **************************************************************************** 930 ****************************************************************************/ 931 932 static struct platform_device *tpacpi_pdev; 933 static struct platform_device *tpacpi_sensors_pdev; 934 static struct device *tpacpi_hwmon; 935 static struct input_dev *tpacpi_inputdev; 936 static struct mutex tpacpi_inputdev_send_mutex; 937 static LIST_HEAD(tpacpi_all_drivers); 938 939 #ifdef CONFIG_PM_SLEEP 940 static int tpacpi_suspend_handler(struct device *dev) 941 { 942 struct ibm_struct *ibm, *itmp; 943 944 list_for_each_entry_safe(ibm, itmp, 945 &tpacpi_all_drivers, 946 all_drivers) { 947 if (ibm->suspend) 948 (ibm->suspend)(); 949 } 950 951 return 0; 952 } 953 954 static int tpacpi_resume_handler(struct device *dev) 955 { 956 struct ibm_struct *ibm, *itmp; 957 958 list_for_each_entry_safe(ibm, itmp, 959 &tpacpi_all_drivers, 960 all_drivers) { 961 if (ibm->resume) 962 (ibm->resume)(); 963 } 964 965 return 0; 966 } 967 #endif 968 969 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 970 tpacpi_suspend_handler, tpacpi_resume_handler); 971 972 static void tpacpi_shutdown_handler(struct platform_device *pdev) 973 { 974 struct ibm_struct *ibm, *itmp; 975 976 list_for_each_entry_safe(ibm, itmp, 977 &tpacpi_all_drivers, 978 all_drivers) { 979 if (ibm->shutdown) 980 (ibm->shutdown)(); 981 } 982 } 983 984 static struct platform_driver tpacpi_pdriver = { 985 .driver = { 986 .name = TPACPI_DRVR_NAME, 987 .pm = &tpacpi_pm, 988 }, 989 .shutdown = tpacpi_shutdown_handler, 990 }; 991 992 static struct platform_driver tpacpi_hwmon_pdriver = { 993 .driver = { 994 .name = TPACPI_HWMON_DRVR_NAME, 995 }, 996 }; 997 998 /************************************************************************* 999 * sysfs support helpers 1000 */ 1001 1002 struct attribute_set { 1003 unsigned int members, max_members; 1004 struct attribute_group group; 1005 }; 1006 1007 struct attribute_set_obj { 1008 struct attribute_set s; 1009 struct attribute *a; 1010 } __attribute__((packed)); 1011 1012 static struct attribute_set *create_attr_set(unsigned int max_members, 1013 const char *name) 1014 { 1015 struct attribute_set_obj *sobj; 1016 1017 if (max_members == 0) 1018 return NULL; 1019 1020 /* Allocates space for implicit NULL at the end too */ 1021 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1022 max_members * sizeof(struct attribute *), 1023 GFP_KERNEL); 1024 if (!sobj) 1025 return NULL; 1026 sobj->s.max_members = max_members; 1027 sobj->s.group.attrs = &sobj->a; 1028 sobj->s.group.name = name; 1029 1030 return &sobj->s; 1031 } 1032 1033 #define destroy_attr_set(_set) \ 1034 kfree(_set); 1035 1036 /* not multi-threaded safe, use it in a single thread per set */ 1037 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1038 { 1039 if (!s || !attr) 1040 return -EINVAL; 1041 1042 if (s->members >= s->max_members) 1043 return -ENOMEM; 1044 1045 s->group.attrs[s->members] = attr; 1046 s->members++; 1047 1048 return 0; 1049 } 1050 1051 static int add_many_to_attr_set(struct attribute_set *s, 1052 struct attribute **attr, 1053 unsigned int count) 1054 { 1055 int i, res; 1056 1057 for (i = 0; i < count; i++) { 1058 res = add_to_attr_set(s, attr[i]); 1059 if (res) 1060 return res; 1061 } 1062 1063 return 0; 1064 } 1065 1066 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1067 { 1068 sysfs_remove_group(kobj, &s->group); 1069 destroy_attr_set(s); 1070 } 1071 1072 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1073 sysfs_create_group(_kobj, &_attr_set->group) 1074 1075 static int parse_strtoul(const char *buf, 1076 unsigned long max, unsigned long *value) 1077 { 1078 char *endp; 1079 1080 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1081 endp = skip_spaces(endp); 1082 if (*endp || *value > max) 1083 return -EINVAL; 1084 1085 return 0; 1086 } 1087 1088 static void tpacpi_disable_brightness_delay(void) 1089 { 1090 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1091 pr_notice("ACPI backlight control delay disabled\n"); 1092 } 1093 1094 static void printk_deprecated_attribute(const char * const what, 1095 const char * const details) 1096 { 1097 tpacpi_log_usertask("deprecated sysfs attribute"); 1098 pr_warn("WARNING: sysfs attribute %s is deprecated and " 1099 "will be removed. %s\n", 1100 what, details); 1101 } 1102 1103 /************************************************************************* 1104 * rfkill and radio control support helpers 1105 */ 1106 1107 /* 1108 * ThinkPad-ACPI firmware handling model: 1109 * 1110 * WLSW (master wireless switch) is event-driven, and is common to all 1111 * firmware-controlled radios. It cannot be controlled, just monitored, 1112 * as expected. It overrides all radio state in firmware 1113 * 1114 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1115 * (TODO: verify how WLSW interacts with the returned radio state). 1116 * 1117 * The only time there are shadow radio state changes, is when 1118 * masked-off hotkeys are used. 1119 */ 1120 1121 /* 1122 * Internal driver API for radio state: 1123 * 1124 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1125 * bool: true means radio blocked (off) 1126 */ 1127 enum tpacpi_rfkill_state { 1128 TPACPI_RFK_RADIO_OFF = 0, 1129 TPACPI_RFK_RADIO_ON 1130 }; 1131 1132 /* rfkill switches */ 1133 enum tpacpi_rfk_id { 1134 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1135 TPACPI_RFK_WWAN_SW_ID, 1136 TPACPI_RFK_UWB_SW_ID, 1137 TPACPI_RFK_SW_MAX 1138 }; 1139 1140 static const char *tpacpi_rfkill_names[] = { 1141 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1142 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1143 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1144 [TPACPI_RFK_SW_MAX] = NULL 1145 }; 1146 1147 /* ThinkPad-ACPI rfkill subdriver */ 1148 struct tpacpi_rfk { 1149 struct rfkill *rfkill; 1150 enum tpacpi_rfk_id id; 1151 const struct tpacpi_rfk_ops *ops; 1152 }; 1153 1154 struct tpacpi_rfk_ops { 1155 /* firmware interface */ 1156 int (*get_status)(void); 1157 int (*set_status)(const enum tpacpi_rfkill_state); 1158 }; 1159 1160 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1161 1162 /* Query FW and update rfkill sw state for a given rfkill switch */ 1163 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1164 { 1165 int status; 1166 1167 if (!tp_rfk) 1168 return -ENODEV; 1169 1170 status = (tp_rfk->ops->get_status)(); 1171 if (status < 0) 1172 return status; 1173 1174 rfkill_set_sw_state(tp_rfk->rfkill, 1175 (status == TPACPI_RFK_RADIO_OFF)); 1176 1177 return status; 1178 } 1179 1180 /* Query FW and update rfkill sw state for all rfkill switches */ 1181 static void tpacpi_rfk_update_swstate_all(void) 1182 { 1183 unsigned int i; 1184 1185 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1186 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1187 } 1188 1189 /* 1190 * Sync the HW-blocking state of all rfkill switches, 1191 * do notice it causes the rfkill core to schedule uevents 1192 */ 1193 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1194 { 1195 unsigned int i; 1196 struct tpacpi_rfk *tp_rfk; 1197 1198 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1199 tp_rfk = tpacpi_rfkill_switches[i]; 1200 if (tp_rfk) { 1201 if (rfkill_set_hw_state(tp_rfk->rfkill, 1202 blocked)) { 1203 /* ignore -- we track sw block */ 1204 } 1205 } 1206 } 1207 } 1208 1209 /* Call to get the WLSW state from the firmware */ 1210 static int hotkey_get_wlsw(void); 1211 1212 /* Call to query WLSW state and update all rfkill switches */ 1213 static bool tpacpi_rfk_check_hwblock_state(void) 1214 { 1215 int res = hotkey_get_wlsw(); 1216 int hw_blocked; 1217 1218 /* When unknown or unsupported, we have to assume it is unblocked */ 1219 if (res < 0) 1220 return false; 1221 1222 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1223 tpacpi_rfk_update_hwblock_state(hw_blocked); 1224 1225 return hw_blocked; 1226 } 1227 1228 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1229 { 1230 struct tpacpi_rfk *tp_rfk = data; 1231 int res; 1232 1233 dbg_printk(TPACPI_DBG_RFKILL, 1234 "request to change radio state to %s\n", 1235 blocked ? "blocked" : "unblocked"); 1236 1237 /* try to set radio state */ 1238 res = (tp_rfk->ops->set_status)(blocked ? 1239 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1240 1241 /* and update the rfkill core with whatever the FW really did */ 1242 tpacpi_rfk_update_swstate(tp_rfk); 1243 1244 return (res < 0) ? res : 0; 1245 } 1246 1247 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1248 .set_block = tpacpi_rfk_hook_set_block, 1249 }; 1250 1251 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1252 const struct tpacpi_rfk_ops *tp_rfkops, 1253 const enum rfkill_type rfktype, 1254 const char *name, 1255 const bool set_default) 1256 { 1257 struct tpacpi_rfk *atp_rfk; 1258 int res; 1259 bool sw_state = false; 1260 bool hw_state; 1261 int sw_status; 1262 1263 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1264 1265 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1266 if (atp_rfk) 1267 atp_rfk->rfkill = rfkill_alloc(name, 1268 &tpacpi_pdev->dev, 1269 rfktype, 1270 &tpacpi_rfk_rfkill_ops, 1271 atp_rfk); 1272 if (!atp_rfk || !atp_rfk->rfkill) { 1273 pr_err("failed to allocate memory for rfkill class\n"); 1274 kfree(atp_rfk); 1275 return -ENOMEM; 1276 } 1277 1278 atp_rfk->id = id; 1279 atp_rfk->ops = tp_rfkops; 1280 1281 sw_status = (tp_rfkops->get_status)(); 1282 if (sw_status < 0) { 1283 pr_err("failed to read initial state for %s, error %d\n", 1284 name, sw_status); 1285 } else { 1286 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1287 if (set_default) { 1288 /* try to keep the initial state, since we ask the 1289 * firmware to preserve it across S5 in NVRAM */ 1290 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1291 } 1292 } 1293 hw_state = tpacpi_rfk_check_hwblock_state(); 1294 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1295 1296 res = rfkill_register(atp_rfk->rfkill); 1297 if (res < 0) { 1298 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1299 rfkill_destroy(atp_rfk->rfkill); 1300 kfree(atp_rfk); 1301 return res; 1302 } 1303 1304 tpacpi_rfkill_switches[id] = atp_rfk; 1305 1306 pr_info("rfkill switch %s: radio is %sblocked\n", 1307 name, (sw_state || hw_state) ? "" : "un"); 1308 return 0; 1309 } 1310 1311 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1312 { 1313 struct tpacpi_rfk *tp_rfk; 1314 1315 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1316 1317 tp_rfk = tpacpi_rfkill_switches[id]; 1318 if (tp_rfk) { 1319 rfkill_unregister(tp_rfk->rfkill); 1320 rfkill_destroy(tp_rfk->rfkill); 1321 tpacpi_rfkill_switches[id] = NULL; 1322 kfree(tp_rfk); 1323 } 1324 } 1325 1326 static void printk_deprecated_rfkill_attribute(const char * const what) 1327 { 1328 printk_deprecated_attribute(what, 1329 "Please switch to generic rfkill before year 2010"); 1330 } 1331 1332 /* sysfs <radio> enable ------------------------------------------------ */ 1333 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1334 struct device_attribute *attr, 1335 char *buf) 1336 { 1337 int status; 1338 1339 printk_deprecated_rfkill_attribute(attr->attr.name); 1340 1341 /* This is in the ABI... */ 1342 if (tpacpi_rfk_check_hwblock_state()) { 1343 status = TPACPI_RFK_RADIO_OFF; 1344 } else { 1345 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1346 if (status < 0) 1347 return status; 1348 } 1349 1350 return snprintf(buf, PAGE_SIZE, "%d\n", 1351 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1352 } 1353 1354 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1355 struct device_attribute *attr, 1356 const char *buf, size_t count) 1357 { 1358 unsigned long t; 1359 int res; 1360 1361 printk_deprecated_rfkill_attribute(attr->attr.name); 1362 1363 if (parse_strtoul(buf, 1, &t)) 1364 return -EINVAL; 1365 1366 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1367 1368 /* This is in the ABI... */ 1369 if (tpacpi_rfk_check_hwblock_state() && !!t) 1370 return -EPERM; 1371 1372 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1373 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1374 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1375 1376 return (res < 0) ? res : count; 1377 } 1378 1379 /* procfs -------------------------------------------------------------- */ 1380 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1381 { 1382 if (id >= TPACPI_RFK_SW_MAX) 1383 seq_printf(m, "status:\t\tnot supported\n"); 1384 else { 1385 int status; 1386 1387 /* This is in the ABI... */ 1388 if (tpacpi_rfk_check_hwblock_state()) { 1389 status = TPACPI_RFK_RADIO_OFF; 1390 } else { 1391 status = tpacpi_rfk_update_swstate( 1392 tpacpi_rfkill_switches[id]); 1393 if (status < 0) 1394 return status; 1395 } 1396 1397 seq_printf(m, "status:\t\t%s\n", 1398 (status == TPACPI_RFK_RADIO_ON) ? 1399 "enabled" : "disabled"); 1400 seq_printf(m, "commands:\tenable, disable\n"); 1401 } 1402 1403 return 0; 1404 } 1405 1406 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1407 { 1408 char *cmd; 1409 int status = -1; 1410 int res = 0; 1411 1412 if (id >= TPACPI_RFK_SW_MAX) 1413 return -ENODEV; 1414 1415 while ((cmd = next_cmd(&buf))) { 1416 if (strlencmp(cmd, "enable") == 0) 1417 status = TPACPI_RFK_RADIO_ON; 1418 else if (strlencmp(cmd, "disable") == 0) 1419 status = TPACPI_RFK_RADIO_OFF; 1420 else 1421 return -EINVAL; 1422 } 1423 1424 if (status != -1) { 1425 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1426 (status == TPACPI_RFK_RADIO_ON) ? 1427 "enable" : "disable", 1428 tpacpi_rfkill_names[id]); 1429 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1430 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1431 } 1432 1433 return res; 1434 } 1435 1436 /************************************************************************* 1437 * thinkpad-acpi driver attributes 1438 */ 1439 1440 /* interface_version --------------------------------------------------- */ 1441 static ssize_t tpacpi_driver_interface_version_show( 1442 struct device_driver *drv, 1443 char *buf) 1444 { 1445 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1446 } 1447 1448 static DRIVER_ATTR(interface_version, S_IRUGO, 1449 tpacpi_driver_interface_version_show, NULL); 1450 1451 /* debug_level --------------------------------------------------------- */ 1452 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1453 char *buf) 1454 { 1455 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1456 } 1457 1458 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1459 const char *buf, size_t count) 1460 { 1461 unsigned long t; 1462 1463 if (parse_strtoul(buf, 0xffff, &t)) 1464 return -EINVAL; 1465 1466 dbg_level = t; 1467 1468 return count; 1469 } 1470 1471 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1472 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1473 1474 /* version ------------------------------------------------------------- */ 1475 static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1476 char *buf) 1477 { 1478 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1479 TPACPI_DESC, TPACPI_VERSION); 1480 } 1481 1482 static DRIVER_ATTR(version, S_IRUGO, 1483 tpacpi_driver_version_show, NULL); 1484 1485 /* --------------------------------------------------------------------- */ 1486 1487 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1488 1489 /* wlsw_emulstate ------------------------------------------------------ */ 1490 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1491 char *buf) 1492 { 1493 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1494 } 1495 1496 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1497 const char *buf, size_t count) 1498 { 1499 unsigned long t; 1500 1501 if (parse_strtoul(buf, 1, &t)) 1502 return -EINVAL; 1503 1504 if (tpacpi_wlsw_emulstate != !!t) { 1505 tpacpi_wlsw_emulstate = !!t; 1506 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1507 } 1508 1509 return count; 1510 } 1511 1512 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1513 tpacpi_driver_wlsw_emulstate_show, 1514 tpacpi_driver_wlsw_emulstate_store); 1515 1516 /* bluetooth_emulstate ------------------------------------------------- */ 1517 static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1518 struct device_driver *drv, 1519 char *buf) 1520 { 1521 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1522 } 1523 1524 static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1525 struct device_driver *drv, 1526 const char *buf, size_t count) 1527 { 1528 unsigned long t; 1529 1530 if (parse_strtoul(buf, 1, &t)) 1531 return -EINVAL; 1532 1533 tpacpi_bluetooth_emulstate = !!t; 1534 1535 return count; 1536 } 1537 1538 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1539 tpacpi_driver_bluetooth_emulstate_show, 1540 tpacpi_driver_bluetooth_emulstate_store); 1541 1542 /* wwan_emulstate ------------------------------------------------- */ 1543 static ssize_t tpacpi_driver_wwan_emulstate_show( 1544 struct device_driver *drv, 1545 char *buf) 1546 { 1547 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1548 } 1549 1550 static ssize_t tpacpi_driver_wwan_emulstate_store( 1551 struct device_driver *drv, 1552 const char *buf, size_t count) 1553 { 1554 unsigned long t; 1555 1556 if (parse_strtoul(buf, 1, &t)) 1557 return -EINVAL; 1558 1559 tpacpi_wwan_emulstate = !!t; 1560 1561 return count; 1562 } 1563 1564 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1565 tpacpi_driver_wwan_emulstate_show, 1566 tpacpi_driver_wwan_emulstate_store); 1567 1568 /* uwb_emulstate ------------------------------------------------- */ 1569 static ssize_t tpacpi_driver_uwb_emulstate_show( 1570 struct device_driver *drv, 1571 char *buf) 1572 { 1573 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1574 } 1575 1576 static ssize_t tpacpi_driver_uwb_emulstate_store( 1577 struct device_driver *drv, 1578 const char *buf, size_t count) 1579 { 1580 unsigned long t; 1581 1582 if (parse_strtoul(buf, 1, &t)) 1583 return -EINVAL; 1584 1585 tpacpi_uwb_emulstate = !!t; 1586 1587 return count; 1588 } 1589 1590 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1591 tpacpi_driver_uwb_emulstate_show, 1592 tpacpi_driver_uwb_emulstate_store); 1593 #endif 1594 1595 /* --------------------------------------------------------------------- */ 1596 1597 static struct driver_attribute *tpacpi_driver_attributes[] = { 1598 &driver_attr_debug_level, &driver_attr_version, 1599 &driver_attr_interface_version, 1600 }; 1601 1602 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1603 { 1604 int i, res; 1605 1606 i = 0; 1607 res = 0; 1608 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1609 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1610 i++; 1611 } 1612 1613 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1614 if (!res && dbg_wlswemul) 1615 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1616 if (!res && dbg_bluetoothemul) 1617 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1618 if (!res && dbg_wwanemul) 1619 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1620 if (!res && dbg_uwbemul) 1621 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1622 #endif 1623 1624 return res; 1625 } 1626 1627 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1628 { 1629 int i; 1630 1631 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1632 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1633 1634 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1635 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1636 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1637 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1638 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1639 #endif 1640 } 1641 1642 /************************************************************************* 1643 * Firmware Data 1644 */ 1645 1646 /* 1647 * Table of recommended minimum BIOS versions 1648 * 1649 * Reasons for listing: 1650 * 1. Stable BIOS, listed because the unknown amount of 1651 * bugs and bad ACPI behaviour on older versions 1652 * 1653 * 2. BIOS or EC fw with known bugs that trigger on Linux 1654 * 1655 * 3. BIOS with known reduced functionality in older versions 1656 * 1657 * We recommend the latest BIOS and EC version. 1658 * We only support the latest BIOS and EC fw version as a rule. 1659 * 1660 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1661 * Information from users in ThinkWiki 1662 * 1663 * WARNING: we use this table also to detect that the machine is 1664 * a ThinkPad in some cases, so don't remove entries lightly. 1665 */ 1666 1667 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1668 { .vendor = (__v), \ 1669 .bios = TPID(__id1, __id2), \ 1670 .ec = TPACPI_MATCH_ANY, \ 1671 .quirks = TPACPI_MATCH_ANY << 16 \ 1672 | (__bv1) << 8 | (__bv2) } 1673 1674 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1675 __eid, __ev1, __ev2) \ 1676 { .vendor = (__v), \ 1677 .bios = TPID(__bid1, __bid2), \ 1678 .ec = __eid, \ 1679 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1680 | (__bv1) << 8 | (__bv2) } 1681 1682 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1683 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1684 1685 /* Outdated IBM BIOSes often lack the EC id string */ 1686 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1687 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1688 __bv1, __bv2, TPID(__id1, __id2), \ 1689 __ev1, __ev2), \ 1690 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1691 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1692 __ev1, __ev2) 1693 1694 /* Outdated IBM BIOSes often lack the EC id string */ 1695 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1696 __eid1, __eid2, __ev1, __ev2) \ 1697 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1698 __bv1, __bv2, TPID(__eid1, __eid2), \ 1699 __ev1, __ev2), \ 1700 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1701 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1702 __ev1, __ev2) 1703 1704 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1705 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1706 1707 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1708 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1709 __bv1, __bv2, TPID(__id1, __id2), \ 1710 __ev1, __ev2) 1711 1712 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1713 __eid1, __eid2, __ev1, __ev2) \ 1714 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1715 __bv1, __bv2, TPID(__eid1, __eid2), \ 1716 __ev1, __ev2) 1717 1718 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1719 /* Numeric models ------------------ */ 1720 /* FW MODEL BIOS VERS */ 1721 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1722 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1723 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1724 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1725 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1726 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1727 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1728 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1729 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1730 1731 /* A-series ------------------------- */ 1732 /* FW MODEL BIOS VERS EC VERS */ 1733 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1734 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1735 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1736 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1737 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1738 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1739 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1740 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1741 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1742 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1743 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1744 1745 /* G-series ------------------------- */ 1746 /* FW MODEL BIOS VERS */ 1747 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1748 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1749 1750 /* R-series, T-series --------------- */ 1751 /* FW MODEL BIOS VERS EC VERS */ 1752 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1753 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1754 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1755 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1756 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1757 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1758 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1759 T40/p, T41/p, T42/p (1) */ 1760 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1761 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1762 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1763 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1764 1765 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1766 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1767 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1768 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1769 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1770 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1771 1772 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1773 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1774 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1775 1776 /* BIOS FW BIOS VERS EC FW EC VERS */ 1777 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1778 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1779 1780 /* X-series ------------------------- */ 1781 /* FW MODEL BIOS VERS EC VERS */ 1782 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1783 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1784 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1785 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1786 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1787 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1788 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1789 1790 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1791 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1792 1793 /* (0) - older versions lack DMI EC fw string and functionality */ 1794 /* (1) - older versions known to lack functionality */ 1795 }; 1796 1797 #undef TPV_QL1 1798 #undef TPV_QL0 1799 #undef TPV_QI2 1800 #undef TPV_QI1 1801 #undef TPV_QI0 1802 #undef TPV_Q_X 1803 #undef TPV_Q 1804 1805 static void __init tpacpi_check_outdated_fw(void) 1806 { 1807 unsigned long fwvers; 1808 u16 ec_version, bios_version; 1809 1810 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1811 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1812 1813 if (!fwvers) 1814 return; 1815 1816 bios_version = fwvers & 0xffffU; 1817 ec_version = (fwvers >> 16) & 0xffffU; 1818 1819 /* note that unknown versions are set to 0x0000 and we use that */ 1820 if ((bios_version > thinkpad_id.bios_release) || 1821 (ec_version > thinkpad_id.ec_release && 1822 ec_version != TPACPI_MATCH_ANY)) { 1823 /* 1824 * The changelogs would let us track down the exact 1825 * reason, but it is just too much of a pain to track 1826 * it. We only list BIOSes that are either really 1827 * broken, or really stable to begin with, so it is 1828 * best if the user upgrades the firmware anyway. 1829 */ 1830 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1831 pr_warn("WARNING: This firmware may be missing critical bug " 1832 "fixes and/or important features\n"); 1833 } 1834 } 1835 1836 static bool __init tpacpi_is_fw_known(void) 1837 { 1838 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1839 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1840 } 1841 1842 /**************************************************************************** 1843 **************************************************************************** 1844 * 1845 * Subdrivers 1846 * 1847 **************************************************************************** 1848 ****************************************************************************/ 1849 1850 /************************************************************************* 1851 * thinkpad-acpi metadata subdriver 1852 */ 1853 1854 static int thinkpad_acpi_driver_read(struct seq_file *m) 1855 { 1856 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1857 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1858 return 0; 1859 } 1860 1861 static struct ibm_struct thinkpad_acpi_driver_data = { 1862 .name = "driver", 1863 .read = thinkpad_acpi_driver_read, 1864 }; 1865 1866 /************************************************************************* 1867 * Hotkey subdriver 1868 */ 1869 1870 /* 1871 * ThinkPad firmware event model 1872 * 1873 * The ThinkPad firmware has two main event interfaces: normal ACPI 1874 * notifications (which follow the ACPI standard), and a private event 1875 * interface. 1876 * 1877 * The private event interface also issues events for the hotkeys. As 1878 * the driver gained features, the event handling code ended up being 1879 * built around the hotkey subdriver. This will need to be refactored 1880 * to a more formal event API eventually. 1881 * 1882 * Some "hotkeys" are actually supposed to be used as event reports, 1883 * such as "brightness has changed", "volume has changed", depending on 1884 * the ThinkPad model and how the firmware is operating. 1885 * 1886 * Unlike other classes, hotkey-class events have mask/unmask control on 1887 * non-ancient firmware. However, how it behaves changes a lot with the 1888 * firmware model and version. 1889 */ 1890 1891 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1892 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1893 TP_ACPI_HOTKEYSCAN_FNF2, 1894 TP_ACPI_HOTKEYSCAN_FNF3, 1895 TP_ACPI_HOTKEYSCAN_FNF4, 1896 TP_ACPI_HOTKEYSCAN_FNF5, 1897 TP_ACPI_HOTKEYSCAN_FNF6, 1898 TP_ACPI_HOTKEYSCAN_FNF7, 1899 TP_ACPI_HOTKEYSCAN_FNF8, 1900 TP_ACPI_HOTKEYSCAN_FNF9, 1901 TP_ACPI_HOTKEYSCAN_FNF10, 1902 TP_ACPI_HOTKEYSCAN_FNF11, 1903 TP_ACPI_HOTKEYSCAN_FNF12, 1904 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1905 TP_ACPI_HOTKEYSCAN_FNINSERT, 1906 TP_ACPI_HOTKEYSCAN_FNDELETE, 1907 TP_ACPI_HOTKEYSCAN_FNHOME, 1908 TP_ACPI_HOTKEYSCAN_FNEND, 1909 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1910 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1911 TP_ACPI_HOTKEYSCAN_FNSPACE, 1912 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1913 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1914 TP_ACPI_HOTKEYSCAN_MUTE, 1915 TP_ACPI_HOTKEYSCAN_THINKPAD, 1916 TP_ACPI_HOTKEYSCAN_UNK1, 1917 TP_ACPI_HOTKEYSCAN_UNK2, 1918 TP_ACPI_HOTKEYSCAN_UNK3, 1919 TP_ACPI_HOTKEYSCAN_UNK4, 1920 TP_ACPI_HOTKEYSCAN_UNK5, 1921 TP_ACPI_HOTKEYSCAN_UNK6, 1922 TP_ACPI_HOTKEYSCAN_UNK7, 1923 TP_ACPI_HOTKEYSCAN_UNK8, 1924 1925 TP_ACPI_HOTKEYSCAN_MUTE2, 1926 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1927 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1928 TP_ACPI_HOTKEYSCAN_CLOUD, 1929 TP_ACPI_HOTKEYSCAN_UNK9, 1930 TP_ACPI_HOTKEYSCAN_VOICE, 1931 TP_ACPI_HOTKEYSCAN_UNK10, 1932 TP_ACPI_HOTKEYSCAN_GESTURES, 1933 TP_ACPI_HOTKEYSCAN_UNK11, 1934 TP_ACPI_HOTKEYSCAN_UNK12, 1935 TP_ACPI_HOTKEYSCAN_UNK13, 1936 TP_ACPI_HOTKEYSCAN_CONFIG, 1937 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1938 TP_ACPI_HOTKEYSCAN_RELOAD, 1939 TP_ACPI_HOTKEYSCAN_BACK, 1940 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1941 TP_ACPI_HOTKEYSCAN_MIC_UP, 1942 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1943 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1944 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1945 1946 /* Hotkey keymap size */ 1947 TPACPI_HOTKEY_MAP_LEN 1948 }; 1949 1950 enum { /* Keys/events available through NVRAM polling */ 1951 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1952 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1953 }; 1954 1955 enum { /* Positions of some of the keys in hotkey masks */ 1956 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1957 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1958 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1959 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1960 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1961 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1962 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1963 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1964 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1965 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1966 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1967 }; 1968 1969 enum { /* NVRAM to ACPI HKEY group map */ 1970 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1971 TP_ACPI_HKEY_ZOOM_MASK | 1972 TP_ACPI_HKEY_DISPSWTCH_MASK | 1973 TP_ACPI_HKEY_HIBERNATE_MASK, 1974 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1975 TP_ACPI_HKEY_BRGHTDWN_MASK, 1976 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1977 TP_ACPI_HKEY_VOLDWN_MASK | 1978 TP_ACPI_HKEY_MUTE_MASK, 1979 }; 1980 1981 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1982 struct tp_nvram_state { 1983 u16 thinkpad_toggle:1; 1984 u16 zoom_toggle:1; 1985 u16 display_toggle:1; 1986 u16 thinklight_toggle:1; 1987 u16 hibernate_toggle:1; 1988 u16 displayexp_toggle:1; 1989 u16 display_state:1; 1990 u16 brightness_toggle:1; 1991 u16 volume_toggle:1; 1992 u16 mute:1; 1993 1994 u8 brightness_level; 1995 u8 volume_level; 1996 }; 1997 1998 /* kthread for the hotkey poller */ 1999 static struct task_struct *tpacpi_hotkey_task; 2000 2001 /* 2002 * Acquire mutex to write poller control variables as an 2003 * atomic block. 2004 * 2005 * Increment hotkey_config_change when changing them if you 2006 * want the kthread to forget old state. 2007 * 2008 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2009 */ 2010 static struct mutex hotkey_thread_data_mutex; 2011 static unsigned int hotkey_config_change; 2012 2013 /* 2014 * hotkey poller control variables 2015 * 2016 * Must be atomic or readers will also need to acquire mutex 2017 * 2018 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2019 * should be used only when the changes need to be taken as 2020 * a block, OR when one needs to force the kthread to forget 2021 * old state. 2022 */ 2023 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2024 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2025 2026 #define HOTKEY_CONFIG_CRITICAL_START \ 2027 do { \ 2028 mutex_lock(&hotkey_thread_data_mutex); \ 2029 hotkey_config_change++; \ 2030 } while (0); 2031 #define HOTKEY_CONFIG_CRITICAL_END \ 2032 mutex_unlock(&hotkey_thread_data_mutex); 2033 2034 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2035 2036 #define hotkey_source_mask 0U 2037 #define HOTKEY_CONFIG_CRITICAL_START 2038 #define HOTKEY_CONFIG_CRITICAL_END 2039 2040 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2041 2042 static struct mutex hotkey_mutex; 2043 2044 static enum { /* Reasons for waking up */ 2045 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2046 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2047 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2048 } hotkey_wakeup_reason; 2049 2050 static int hotkey_autosleep_ack; 2051 2052 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2053 static u32 hotkey_all_mask; /* all events supported in fw */ 2054 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */ 2055 static u32 hotkey_reserved_mask; /* events better left disabled */ 2056 static u32 hotkey_driver_mask; /* events needed by the driver */ 2057 static u32 hotkey_user_mask; /* events visible to userspace */ 2058 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2059 2060 static u16 *hotkey_keycode_map; 2061 2062 static struct attribute_set *hotkey_dev_attributes; 2063 2064 static void tpacpi_driver_event(const unsigned int hkey_event); 2065 static void hotkey_driver_event(const unsigned int scancode); 2066 static void hotkey_poll_setup(const bool may_warn); 2067 2068 /* HKEY.MHKG() return bits */ 2069 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2070 /* ThinkPad X1 Yoga (2016) */ 2071 #define TP_EC_CMMD_TABLET_MODE 0x6 2072 2073 static int hotkey_get_wlsw(void) 2074 { 2075 int status; 2076 2077 if (!tp_features.hotkey_wlsw) 2078 return -ENODEV; 2079 2080 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2081 if (dbg_wlswemul) 2082 return (tpacpi_wlsw_emulstate) ? 2083 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2084 #endif 2085 2086 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2087 return -EIO; 2088 2089 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2090 } 2091 2092 static int hotkey_get_tablet_mode(int *status) 2093 { 2094 int s; 2095 2096 switch (tp_features.hotkey_tablet) { 2097 case TP_HOTKEY_TABLET_USES_MHKG: 2098 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2099 return -EIO; 2100 2101 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2102 break; 2103 case TP_HOTKEY_TABLET_USES_CMMD: 2104 if (!acpi_evalf(ec_handle, &s, "CMMD", "d")) 2105 return -EIO; 2106 2107 *status = (s == TP_EC_CMMD_TABLET_MODE); 2108 break; 2109 default: 2110 break; 2111 } 2112 2113 return 0; 2114 } 2115 2116 /* 2117 * Reads current event mask from firmware, and updates 2118 * hotkey_acpi_mask accordingly. Also resets any bits 2119 * from hotkey_user_mask that are unavailable to be 2120 * delivered (shadow requirement of the userspace ABI). 2121 * 2122 * Call with hotkey_mutex held 2123 */ 2124 static int hotkey_mask_get(void) 2125 { 2126 if (tp_features.hotkey_mask) { 2127 u32 m = 0; 2128 2129 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2130 return -EIO; 2131 2132 hotkey_acpi_mask = m; 2133 } else { 2134 /* no mask support doesn't mean no event support... */ 2135 hotkey_acpi_mask = hotkey_all_mask; 2136 } 2137 2138 /* sync userspace-visible mask */ 2139 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2140 2141 return 0; 2142 } 2143 2144 static void hotkey_mask_warn_incomplete_mask(void) 2145 { 2146 /* log only what the user can fix... */ 2147 const u32 wantedmask = hotkey_driver_mask & 2148 ~(hotkey_acpi_mask | hotkey_source_mask) & 2149 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2150 2151 if (wantedmask) 2152 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2153 } 2154 2155 /* 2156 * Set the firmware mask when supported 2157 * 2158 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2159 * 2160 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2161 * 2162 * Call with hotkey_mutex held 2163 */ 2164 static int hotkey_mask_set(u32 mask) 2165 { 2166 int i; 2167 int rc = 0; 2168 2169 const u32 fwmask = mask & ~hotkey_source_mask; 2170 2171 if (tp_features.hotkey_mask) { 2172 for (i = 0; i < 32; i++) { 2173 if (!acpi_evalf(hkey_handle, 2174 NULL, "MHKM", "vdd", i + 1, 2175 !!(mask & (1 << i)))) { 2176 rc = -EIO; 2177 break; 2178 } 2179 } 2180 } 2181 2182 /* 2183 * We *must* make an inconditional call to hotkey_mask_get to 2184 * refresh hotkey_acpi_mask and update hotkey_user_mask 2185 * 2186 * Take the opportunity to also log when we cannot _enable_ 2187 * a given event. 2188 */ 2189 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2190 pr_notice("asked for hotkey mask 0x%08x, but " 2191 "firmware forced it to 0x%08x\n", 2192 fwmask, hotkey_acpi_mask); 2193 } 2194 2195 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2196 hotkey_mask_warn_incomplete_mask(); 2197 2198 return rc; 2199 } 2200 2201 /* 2202 * Sets hotkey_user_mask and tries to set the firmware mask 2203 * 2204 * Call with hotkey_mutex held 2205 */ 2206 static int hotkey_user_mask_set(const u32 mask) 2207 { 2208 int rc; 2209 2210 /* Give people a chance to notice they are doing something that 2211 * is bound to go boom on their users sooner or later */ 2212 if (!tp_warned.hotkey_mask_ff && 2213 (mask == 0xffff || mask == 0xffffff || 2214 mask == 0xffffffff)) { 2215 tp_warned.hotkey_mask_ff = 1; 2216 pr_notice("setting the hotkey mask to 0x%08x is likely " 2217 "not the best way to go about it\n", mask); 2218 pr_notice("please consider using the driver defaults, " 2219 "and refer to up-to-date thinkpad-acpi " 2220 "documentation\n"); 2221 } 2222 2223 /* Try to enable what the user asked for, plus whatever we need. 2224 * this syncs everything but won't enable bits in hotkey_user_mask */ 2225 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2226 2227 /* Enable the available bits in hotkey_user_mask */ 2228 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2229 2230 return rc; 2231 } 2232 2233 /* 2234 * Sets the driver hotkey mask. 2235 * 2236 * Can be called even if the hotkey subdriver is inactive 2237 */ 2238 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2239 { 2240 int rc; 2241 2242 /* Do the right thing if hotkey_init has not been called yet */ 2243 if (!tp_features.hotkey) { 2244 hotkey_driver_mask = mask; 2245 return 0; 2246 } 2247 2248 mutex_lock(&hotkey_mutex); 2249 2250 HOTKEY_CONFIG_CRITICAL_START 2251 hotkey_driver_mask = mask; 2252 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2253 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2254 #endif 2255 HOTKEY_CONFIG_CRITICAL_END 2256 2257 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2258 ~hotkey_source_mask); 2259 hotkey_poll_setup(true); 2260 2261 mutex_unlock(&hotkey_mutex); 2262 2263 return rc; 2264 } 2265 2266 static int hotkey_status_get(int *status) 2267 { 2268 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2269 return -EIO; 2270 2271 return 0; 2272 } 2273 2274 static int hotkey_status_set(bool enable) 2275 { 2276 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2277 return -EIO; 2278 2279 return 0; 2280 } 2281 2282 static void tpacpi_input_send_tabletsw(void) 2283 { 2284 int state; 2285 2286 if (tp_features.hotkey_tablet && 2287 !hotkey_get_tablet_mode(&state)) { 2288 mutex_lock(&tpacpi_inputdev_send_mutex); 2289 2290 input_report_switch(tpacpi_inputdev, 2291 SW_TABLET_MODE, !!state); 2292 input_sync(tpacpi_inputdev); 2293 2294 mutex_unlock(&tpacpi_inputdev_send_mutex); 2295 } 2296 } 2297 2298 /* Do NOT call without validating scancode first */ 2299 static void tpacpi_input_send_key(const unsigned int scancode) 2300 { 2301 const unsigned int keycode = hotkey_keycode_map[scancode]; 2302 2303 if (keycode != KEY_RESERVED) { 2304 mutex_lock(&tpacpi_inputdev_send_mutex); 2305 2306 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2307 input_report_key(tpacpi_inputdev, keycode, 1); 2308 input_sync(tpacpi_inputdev); 2309 2310 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2311 input_report_key(tpacpi_inputdev, keycode, 0); 2312 input_sync(tpacpi_inputdev); 2313 2314 mutex_unlock(&tpacpi_inputdev_send_mutex); 2315 } 2316 } 2317 2318 /* Do NOT call without validating scancode first */ 2319 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2320 { 2321 hotkey_driver_event(scancode); 2322 if (hotkey_user_mask & (1 << scancode)) 2323 tpacpi_input_send_key(scancode); 2324 } 2325 2326 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2327 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2328 2329 /* Do NOT call without validating scancode first */ 2330 static void tpacpi_hotkey_send_key(unsigned int scancode) 2331 { 2332 tpacpi_input_send_key_masked(scancode); 2333 } 2334 2335 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2336 { 2337 u8 d; 2338 2339 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2340 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2341 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2342 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2343 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2344 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2345 } 2346 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) { 2347 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2348 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2349 } 2350 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2351 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2352 n->displayexp_toggle = 2353 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2354 } 2355 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2356 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2357 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2358 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2359 n->brightness_toggle = 2360 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2361 } 2362 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2363 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2364 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2365 >> TP_NVRAM_POS_LEVEL_VOLUME; 2366 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2367 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2368 } 2369 } 2370 2371 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2372 do { \ 2373 if ((event_mask & (1 << __scancode)) && \ 2374 oldn->__member != newn->__member) \ 2375 tpacpi_hotkey_send_key(__scancode); \ 2376 } while (0) 2377 2378 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2379 do { \ 2380 if (event_mask & (1 << __scancode)) \ 2381 tpacpi_hotkey_send_key(__scancode); \ 2382 } while (0) 2383 2384 static void issue_volchange(const unsigned int oldvol, 2385 const unsigned int newvol, 2386 const u32 event_mask) 2387 { 2388 unsigned int i = oldvol; 2389 2390 while (i > newvol) { 2391 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2392 i--; 2393 } 2394 while (i < newvol) { 2395 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2396 i++; 2397 } 2398 } 2399 2400 static void issue_brightnesschange(const unsigned int oldbrt, 2401 const unsigned int newbrt, 2402 const u32 event_mask) 2403 { 2404 unsigned int i = oldbrt; 2405 2406 while (i > newbrt) { 2407 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2408 i--; 2409 } 2410 while (i < newbrt) { 2411 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2412 i++; 2413 } 2414 } 2415 2416 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2417 struct tp_nvram_state *newn, 2418 const u32 event_mask) 2419 { 2420 2421 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2422 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2423 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2424 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2425 2426 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2427 2428 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2429 2430 /* 2431 * Handle volume 2432 * 2433 * This code is supposed to duplicate the IBM firmware behaviour: 2434 * - Pressing MUTE issues mute hotkey message, even when already mute 2435 * - Pressing Volume up/down issues volume up/down hotkey messages, 2436 * even when already at maximum or minimum volume 2437 * - The act of unmuting issues volume up/down notification, 2438 * depending which key was used to unmute 2439 * 2440 * We are constrained to what the NVRAM can tell us, which is not much 2441 * and certainly not enough if more than one volume hotkey was pressed 2442 * since the last poll cycle. 2443 * 2444 * Just to make our life interesting, some newer Lenovo ThinkPads have 2445 * bugs in the BIOS and may fail to update volume_toggle properly. 2446 */ 2447 if (newn->mute) { 2448 /* muted */ 2449 if (!oldn->mute || 2450 oldn->volume_toggle != newn->volume_toggle || 2451 oldn->volume_level != newn->volume_level) { 2452 /* recently muted, or repeated mute keypress, or 2453 * multiple presses ending in mute */ 2454 issue_volchange(oldn->volume_level, newn->volume_level, 2455 event_mask); 2456 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2457 } 2458 } else { 2459 /* unmute */ 2460 if (oldn->mute) { 2461 /* recently unmuted, issue 'unmute' keypress */ 2462 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2463 } 2464 if (oldn->volume_level != newn->volume_level) { 2465 issue_volchange(oldn->volume_level, newn->volume_level, 2466 event_mask); 2467 } else if (oldn->volume_toggle != newn->volume_toggle) { 2468 /* repeated vol up/down keypress at end of scale ? */ 2469 if (newn->volume_level == 0) 2470 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2471 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2472 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2473 } 2474 } 2475 2476 /* handle brightness */ 2477 if (oldn->brightness_level != newn->brightness_level) { 2478 issue_brightnesschange(oldn->brightness_level, 2479 newn->brightness_level, event_mask); 2480 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2481 /* repeated key presses that didn't change state */ 2482 if (newn->brightness_level == 0) 2483 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2484 else if (newn->brightness_level >= bright_maxlvl 2485 && !tp_features.bright_unkfw) 2486 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2487 } 2488 2489 #undef TPACPI_COMPARE_KEY 2490 #undef TPACPI_MAY_SEND_KEY 2491 } 2492 2493 /* 2494 * Polling driver 2495 * 2496 * We track all events in hotkey_source_mask all the time, since 2497 * most of them are edge-based. We only issue those requested by 2498 * hotkey_user_mask or hotkey_driver_mask, though. 2499 */ 2500 static int hotkey_kthread(void *data) 2501 { 2502 struct tp_nvram_state s[2]; 2503 u32 poll_mask, event_mask; 2504 unsigned int si, so; 2505 unsigned long t; 2506 unsigned int change_detector; 2507 unsigned int poll_freq; 2508 bool was_frozen; 2509 2510 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2511 goto exit; 2512 2513 set_freezable(); 2514 2515 so = 0; 2516 si = 1; 2517 t = 0; 2518 2519 /* Initial state for compares */ 2520 mutex_lock(&hotkey_thread_data_mutex); 2521 change_detector = hotkey_config_change; 2522 poll_mask = hotkey_source_mask; 2523 event_mask = hotkey_source_mask & 2524 (hotkey_driver_mask | hotkey_user_mask); 2525 poll_freq = hotkey_poll_freq; 2526 mutex_unlock(&hotkey_thread_data_mutex); 2527 hotkey_read_nvram(&s[so], poll_mask); 2528 2529 while (!kthread_should_stop()) { 2530 if (t == 0) { 2531 if (likely(poll_freq)) 2532 t = 1000/poll_freq; 2533 else 2534 t = 100; /* should never happen... */ 2535 } 2536 t = msleep_interruptible(t); 2537 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2538 break; 2539 2540 if (t > 0 && !was_frozen) 2541 continue; 2542 2543 mutex_lock(&hotkey_thread_data_mutex); 2544 if (was_frozen || hotkey_config_change != change_detector) { 2545 /* forget old state on thaw or config change */ 2546 si = so; 2547 t = 0; 2548 change_detector = hotkey_config_change; 2549 } 2550 poll_mask = hotkey_source_mask; 2551 event_mask = hotkey_source_mask & 2552 (hotkey_driver_mask | hotkey_user_mask); 2553 poll_freq = hotkey_poll_freq; 2554 mutex_unlock(&hotkey_thread_data_mutex); 2555 2556 if (likely(poll_mask)) { 2557 hotkey_read_nvram(&s[si], poll_mask); 2558 if (likely(si != so)) { 2559 hotkey_compare_and_issue_event(&s[so], &s[si], 2560 event_mask); 2561 } 2562 } 2563 2564 so = si; 2565 si ^= 1; 2566 } 2567 2568 exit: 2569 return 0; 2570 } 2571 2572 /* call with hotkey_mutex held */ 2573 static void hotkey_poll_stop_sync(void) 2574 { 2575 if (tpacpi_hotkey_task) { 2576 kthread_stop(tpacpi_hotkey_task); 2577 tpacpi_hotkey_task = NULL; 2578 } 2579 } 2580 2581 /* call with hotkey_mutex held */ 2582 static void hotkey_poll_setup(const bool may_warn) 2583 { 2584 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2585 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2586 2587 if (hotkey_poll_freq > 0 && 2588 (poll_driver_mask || 2589 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2590 if (!tpacpi_hotkey_task) { 2591 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2592 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2593 if (IS_ERR(tpacpi_hotkey_task)) { 2594 tpacpi_hotkey_task = NULL; 2595 pr_err("could not create kernel thread " 2596 "for hotkey polling\n"); 2597 } 2598 } 2599 } else { 2600 hotkey_poll_stop_sync(); 2601 if (may_warn && (poll_driver_mask || poll_user_mask) && 2602 hotkey_poll_freq == 0) { 2603 pr_notice("hot keys 0x%08x and/or events 0x%08x " 2604 "require polling, which is currently " 2605 "disabled\n", 2606 poll_user_mask, poll_driver_mask); 2607 } 2608 } 2609 } 2610 2611 static void hotkey_poll_setup_safe(const bool may_warn) 2612 { 2613 mutex_lock(&hotkey_mutex); 2614 hotkey_poll_setup(may_warn); 2615 mutex_unlock(&hotkey_mutex); 2616 } 2617 2618 /* call with hotkey_mutex held */ 2619 static void hotkey_poll_set_freq(unsigned int freq) 2620 { 2621 if (!freq) 2622 hotkey_poll_stop_sync(); 2623 2624 hotkey_poll_freq = freq; 2625 } 2626 2627 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2628 2629 static void hotkey_poll_setup(const bool __unused) 2630 { 2631 } 2632 2633 static void hotkey_poll_setup_safe(const bool __unused) 2634 { 2635 } 2636 2637 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2638 2639 static int hotkey_inputdev_open(struct input_dev *dev) 2640 { 2641 switch (tpacpi_lifecycle) { 2642 case TPACPI_LIFE_INIT: 2643 case TPACPI_LIFE_RUNNING: 2644 hotkey_poll_setup_safe(false); 2645 return 0; 2646 case TPACPI_LIFE_EXITING: 2647 return -EBUSY; 2648 } 2649 2650 /* Should only happen if tpacpi_lifecycle is corrupt */ 2651 BUG(); 2652 return -EBUSY; 2653 } 2654 2655 static void hotkey_inputdev_close(struct input_dev *dev) 2656 { 2657 /* disable hotkey polling when possible */ 2658 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2659 !(hotkey_source_mask & hotkey_driver_mask)) 2660 hotkey_poll_setup_safe(false); 2661 } 2662 2663 /* sysfs hotkey enable ------------------------------------------------- */ 2664 static ssize_t hotkey_enable_show(struct device *dev, 2665 struct device_attribute *attr, 2666 char *buf) 2667 { 2668 int res, status; 2669 2670 printk_deprecated_attribute("hotkey_enable", 2671 "Hotkey reporting is always enabled"); 2672 2673 res = hotkey_status_get(&status); 2674 if (res) 2675 return res; 2676 2677 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2678 } 2679 2680 static ssize_t hotkey_enable_store(struct device *dev, 2681 struct device_attribute *attr, 2682 const char *buf, size_t count) 2683 { 2684 unsigned long t; 2685 2686 printk_deprecated_attribute("hotkey_enable", 2687 "Hotkeys can be disabled through hotkey_mask"); 2688 2689 if (parse_strtoul(buf, 1, &t)) 2690 return -EINVAL; 2691 2692 if (t == 0) 2693 return -EPERM; 2694 2695 return count; 2696 } 2697 2698 static DEVICE_ATTR_RW(hotkey_enable); 2699 2700 /* sysfs hotkey mask --------------------------------------------------- */ 2701 static ssize_t hotkey_mask_show(struct device *dev, 2702 struct device_attribute *attr, 2703 char *buf) 2704 { 2705 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2706 } 2707 2708 static ssize_t hotkey_mask_store(struct device *dev, 2709 struct device_attribute *attr, 2710 const char *buf, size_t count) 2711 { 2712 unsigned long t; 2713 int res; 2714 2715 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2716 return -EINVAL; 2717 2718 if (mutex_lock_killable(&hotkey_mutex)) 2719 return -ERESTARTSYS; 2720 2721 res = hotkey_user_mask_set(t); 2722 2723 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2724 hotkey_poll_setup(true); 2725 #endif 2726 2727 mutex_unlock(&hotkey_mutex); 2728 2729 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2730 2731 return (res) ? res : count; 2732 } 2733 2734 static DEVICE_ATTR_RW(hotkey_mask); 2735 2736 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2737 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2738 struct device_attribute *attr, 2739 char *buf) 2740 { 2741 return sprintf(buf, "0\n"); 2742 } 2743 2744 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2745 2746 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2747 static ssize_t hotkey_bios_mask_show(struct device *dev, 2748 struct device_attribute *attr, 2749 char *buf) 2750 { 2751 printk_deprecated_attribute("hotkey_bios_mask", 2752 "This attribute is useless."); 2753 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2754 } 2755 2756 static DEVICE_ATTR_RO(hotkey_bios_mask); 2757 2758 /* sysfs hotkey all_mask ----------------------------------------------- */ 2759 static ssize_t hotkey_all_mask_show(struct device *dev, 2760 struct device_attribute *attr, 2761 char *buf) 2762 { 2763 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2764 hotkey_all_mask | hotkey_source_mask); 2765 } 2766 2767 static DEVICE_ATTR_RO(hotkey_all_mask); 2768 2769 /* sysfs hotkey all_mask ----------------------------------------------- */ 2770 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev, 2771 struct device_attribute *attr, 2772 char *buf) 2773 { 2774 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2775 hotkey_adaptive_all_mask | hotkey_source_mask); 2776 } 2777 2778 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask); 2779 2780 /* sysfs hotkey recommended_mask --------------------------------------- */ 2781 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2782 struct device_attribute *attr, 2783 char *buf) 2784 { 2785 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2786 (hotkey_all_mask | hotkey_source_mask) 2787 & ~hotkey_reserved_mask); 2788 } 2789 2790 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2791 2792 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2793 2794 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2795 static ssize_t hotkey_source_mask_show(struct device *dev, 2796 struct device_attribute *attr, 2797 char *buf) 2798 { 2799 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2800 } 2801 2802 static ssize_t hotkey_source_mask_store(struct device *dev, 2803 struct device_attribute *attr, 2804 const char *buf, size_t count) 2805 { 2806 unsigned long t; 2807 u32 r_ev; 2808 int rc; 2809 2810 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2811 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2812 return -EINVAL; 2813 2814 if (mutex_lock_killable(&hotkey_mutex)) 2815 return -ERESTARTSYS; 2816 2817 HOTKEY_CONFIG_CRITICAL_START 2818 hotkey_source_mask = t; 2819 HOTKEY_CONFIG_CRITICAL_END 2820 2821 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2822 ~hotkey_source_mask); 2823 hotkey_poll_setup(true); 2824 2825 /* check if events needed by the driver got disabled */ 2826 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2827 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2828 2829 mutex_unlock(&hotkey_mutex); 2830 2831 if (rc < 0) 2832 pr_err("hotkey_source_mask: " 2833 "failed to update the firmware event mask!\n"); 2834 2835 if (r_ev) 2836 pr_notice("hotkey_source_mask: " 2837 "some important events were disabled: 0x%04x\n", 2838 r_ev); 2839 2840 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2841 2842 return (rc < 0) ? rc : count; 2843 } 2844 2845 static DEVICE_ATTR_RW(hotkey_source_mask); 2846 2847 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2848 static ssize_t hotkey_poll_freq_show(struct device *dev, 2849 struct device_attribute *attr, 2850 char *buf) 2851 { 2852 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2853 } 2854 2855 static ssize_t hotkey_poll_freq_store(struct device *dev, 2856 struct device_attribute *attr, 2857 const char *buf, size_t count) 2858 { 2859 unsigned long t; 2860 2861 if (parse_strtoul(buf, 25, &t)) 2862 return -EINVAL; 2863 2864 if (mutex_lock_killable(&hotkey_mutex)) 2865 return -ERESTARTSYS; 2866 2867 hotkey_poll_set_freq(t); 2868 hotkey_poll_setup(true); 2869 2870 mutex_unlock(&hotkey_mutex); 2871 2872 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2873 2874 return count; 2875 } 2876 2877 static DEVICE_ATTR_RW(hotkey_poll_freq); 2878 2879 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2880 2881 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2882 static ssize_t hotkey_radio_sw_show(struct device *dev, 2883 struct device_attribute *attr, 2884 char *buf) 2885 { 2886 int res; 2887 res = hotkey_get_wlsw(); 2888 if (res < 0) 2889 return res; 2890 2891 /* Opportunistic update */ 2892 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2893 2894 return snprintf(buf, PAGE_SIZE, "%d\n", 2895 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2896 } 2897 2898 static DEVICE_ATTR_RO(hotkey_radio_sw); 2899 2900 static void hotkey_radio_sw_notify_change(void) 2901 { 2902 if (tp_features.hotkey_wlsw) 2903 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2904 "hotkey_radio_sw"); 2905 } 2906 2907 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2908 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2909 struct device_attribute *attr, 2910 char *buf) 2911 { 2912 int res, s; 2913 res = hotkey_get_tablet_mode(&s); 2914 if (res < 0) 2915 return res; 2916 2917 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2918 } 2919 2920 static DEVICE_ATTR_RO(hotkey_tablet_mode); 2921 2922 static void hotkey_tablet_mode_notify_change(void) 2923 { 2924 if (tp_features.hotkey_tablet) 2925 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2926 "hotkey_tablet_mode"); 2927 } 2928 2929 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2930 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2931 struct device_attribute *attr, 2932 char *buf) 2933 { 2934 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2935 } 2936 2937 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2938 2939 static void hotkey_wakeup_reason_notify_change(void) 2940 { 2941 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2942 "wakeup_reason"); 2943 } 2944 2945 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2946 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2947 struct device_attribute *attr, 2948 char *buf) 2949 { 2950 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2951 } 2952 2953 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 2954 hotkey_wakeup_hotunplug_complete_show, NULL); 2955 2956 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2957 { 2958 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2959 "wakeup_hotunplug_complete"); 2960 } 2961 2962 /* sysfs adaptive kbd mode --------------------------------------------- */ 2963 2964 static int adaptive_keyboard_get_mode(void); 2965 static int adaptive_keyboard_set_mode(int new_mode); 2966 2967 enum ADAPTIVE_KEY_MODE { 2968 HOME_MODE, 2969 WEB_BROWSER_MODE, 2970 WEB_CONFERENCE_MODE, 2971 FUNCTION_MODE, 2972 LAYFLAT_MODE 2973 }; 2974 2975 static ssize_t adaptive_kbd_mode_show(struct device *dev, 2976 struct device_attribute *attr, 2977 char *buf) 2978 { 2979 int current_mode; 2980 2981 current_mode = adaptive_keyboard_get_mode(); 2982 if (current_mode < 0) 2983 return current_mode; 2984 2985 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 2986 } 2987 2988 static ssize_t adaptive_kbd_mode_store(struct device *dev, 2989 struct device_attribute *attr, 2990 const char *buf, size_t count) 2991 { 2992 unsigned long t; 2993 int res; 2994 2995 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 2996 return -EINVAL; 2997 2998 res = adaptive_keyboard_set_mode(t); 2999 return (res < 0) ? res : count; 3000 } 3001 3002 static DEVICE_ATTR_RW(adaptive_kbd_mode); 3003 3004 static struct attribute *adaptive_kbd_attributes[] = { 3005 &dev_attr_adaptive_kbd_mode.attr, 3006 NULL 3007 }; 3008 3009 static const struct attribute_group adaptive_kbd_attr_group = { 3010 .attrs = adaptive_kbd_attributes, 3011 }; 3012 3013 /* --------------------------------------------------------------------- */ 3014 3015 static struct attribute *hotkey_attributes[] __initdata = { 3016 &dev_attr_hotkey_enable.attr, 3017 &dev_attr_hotkey_bios_enabled.attr, 3018 &dev_attr_hotkey_bios_mask.attr, 3019 &dev_attr_wakeup_reason.attr, 3020 &dev_attr_wakeup_hotunplug_complete.attr, 3021 &dev_attr_hotkey_mask.attr, 3022 &dev_attr_hotkey_all_mask.attr, 3023 &dev_attr_hotkey_adaptive_all_mask.attr, 3024 &dev_attr_hotkey_recommended_mask.attr, 3025 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3026 &dev_attr_hotkey_source_mask.attr, 3027 &dev_attr_hotkey_poll_freq.attr, 3028 #endif 3029 }; 3030 3031 /* 3032 * Sync both the hw and sw blocking state of all switches 3033 */ 3034 static void tpacpi_send_radiosw_update(void) 3035 { 3036 int wlsw; 3037 3038 /* 3039 * We must sync all rfkill controllers *before* issuing any 3040 * rfkill input events, or we will race the rfkill core input 3041 * handler. 3042 * 3043 * tpacpi_inputdev_send_mutex works as a synchronization point 3044 * for the above. 3045 * 3046 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3047 */ 3048 3049 wlsw = hotkey_get_wlsw(); 3050 3051 /* Sync hw blocking state first if it is hw-blocked */ 3052 if (wlsw == TPACPI_RFK_RADIO_OFF) 3053 tpacpi_rfk_update_hwblock_state(true); 3054 3055 /* Sync sw blocking state */ 3056 tpacpi_rfk_update_swstate_all(); 3057 3058 /* Sync hw blocking state last if it is hw-unblocked */ 3059 if (wlsw == TPACPI_RFK_RADIO_ON) 3060 tpacpi_rfk_update_hwblock_state(false); 3061 3062 /* Issue rfkill input event for WLSW switch */ 3063 if (!(wlsw < 0)) { 3064 mutex_lock(&tpacpi_inputdev_send_mutex); 3065 3066 input_report_switch(tpacpi_inputdev, 3067 SW_RFKILL_ALL, (wlsw > 0)); 3068 input_sync(tpacpi_inputdev); 3069 3070 mutex_unlock(&tpacpi_inputdev_send_mutex); 3071 } 3072 3073 /* 3074 * this can be unconditional, as we will poll state again 3075 * if userspace uses the notify to read data 3076 */ 3077 hotkey_radio_sw_notify_change(); 3078 } 3079 3080 static void hotkey_exit(void) 3081 { 3082 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3083 mutex_lock(&hotkey_mutex); 3084 hotkey_poll_stop_sync(); 3085 mutex_unlock(&hotkey_mutex); 3086 #endif 3087 3088 if (hotkey_dev_attributes) 3089 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3090 3091 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3092 "restoring original HKEY status and mask\n"); 3093 /* yes, there is a bitwise or below, we want the 3094 * functions to be called even if one of them fail */ 3095 if (((tp_features.hotkey_mask && 3096 hotkey_mask_set(hotkey_orig_mask)) | 3097 hotkey_status_set(false)) != 0) 3098 pr_err("failed to restore hot key mask " 3099 "to BIOS defaults\n"); 3100 } 3101 3102 static void __init hotkey_unmap(const unsigned int scancode) 3103 { 3104 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3105 clear_bit(hotkey_keycode_map[scancode], 3106 tpacpi_inputdev->keybit); 3107 hotkey_keycode_map[scancode] = KEY_RESERVED; 3108 } 3109 } 3110 3111 /* 3112 * HKEY quirks: 3113 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3114 */ 3115 3116 #define TPACPI_HK_Q_INIMASK 0x0001 3117 3118 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3119 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3120 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3121 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3122 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3123 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3124 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3125 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3126 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3127 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3128 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3129 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3130 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3131 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3132 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3133 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3134 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3135 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3136 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3137 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3138 }; 3139 3140 typedef u16 tpacpi_keymap_entry_t; 3141 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3142 3143 static int hotkey_init_tablet_mode(void) 3144 { 3145 int in_tablet_mode = 0, res; 3146 char *type = NULL; 3147 3148 if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { 3149 /* For X41t, X60t, X61t Tablets... */ 3150 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; 3151 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); 3152 type = "MHKG"; 3153 } else if (acpi_evalf(ec_handle, &res, "CMMD", "qd")) { 3154 /* For X1 Yoga (2016) */ 3155 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_CMMD; 3156 in_tablet_mode = res == TP_EC_CMMD_TABLET_MODE; 3157 type = "CMMD"; 3158 } 3159 3160 if (!tp_features.hotkey_tablet) 3161 return 0; 3162 3163 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", 3164 type, in_tablet_mode ? "tablet" : "laptop"); 3165 3166 res = add_to_attr_set(hotkey_dev_attributes, 3167 &dev_attr_hotkey_tablet_mode.attr); 3168 if (res) 3169 return -1; 3170 3171 return in_tablet_mode; 3172 } 3173 3174 static int __init hotkey_init(struct ibm_init_struct *iibm) 3175 { 3176 /* Requirements for changing the default keymaps: 3177 * 3178 * 1. Many of the keys are mapped to KEY_RESERVED for very 3179 * good reasons. Do not change them unless you have deep 3180 * knowledge on the IBM and Lenovo ThinkPad firmware for 3181 * the various ThinkPad models. The driver behaves 3182 * differently for KEY_RESERVED: such keys have their 3183 * hot key mask *unset* in mask_recommended, and also 3184 * in the initial hot key mask programmed into the 3185 * firmware at driver load time, which means the firm- 3186 * ware may react very differently if you change them to 3187 * something else; 3188 * 3189 * 2. You must be subscribed to the linux-thinkpad and 3190 * ibm-acpi-devel mailing lists, and you should read the 3191 * list archives since 2007 if you want to change the 3192 * keymaps. This requirement exists so that you will 3193 * know the past history of problems with the thinkpad- 3194 * acpi driver keymaps, and also that you will be 3195 * listening to any bug reports; 3196 * 3197 * 3. Do not send thinkpad-acpi specific patches directly to 3198 * for merging, *ever*. Send them to the linux-acpi 3199 * mailinglist for comments. Merging is to be done only 3200 * through acpi-test and the ACPI maintainer. 3201 * 3202 * If the above is too much to ask, don't change the keymap. 3203 * Ask the thinkpad-acpi maintainer to do it, instead. 3204 */ 3205 3206 enum keymap_index { 3207 TPACPI_KEYMAP_IBM_GENERIC = 0, 3208 TPACPI_KEYMAP_LENOVO_GENERIC, 3209 }; 3210 3211 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3212 /* Generic keymap for IBM ThinkPads */ 3213 [TPACPI_KEYMAP_IBM_GENERIC] = { 3214 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3215 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3216 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3217 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3218 3219 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3220 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3221 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3222 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3223 3224 /* brightness: firmware always reacts to them */ 3225 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3226 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3227 3228 /* Thinklight: firmware always react to it */ 3229 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3230 3231 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3232 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3233 3234 /* Volume: firmware always react to it and reprograms 3235 * the built-in *extra* mixer. Never map it to control 3236 * another mixer by default. */ 3237 KEY_RESERVED, /* 0x14: VOLUME UP */ 3238 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3239 KEY_RESERVED, /* 0x16: MUTE */ 3240 3241 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3242 3243 /* (assignments unknown, please report if found) */ 3244 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3245 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3246 3247 /* No assignments, only used for Adaptive keyboards. */ 3248 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3249 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3250 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3251 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3252 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3253 }, 3254 3255 /* Generic keymap for Lenovo ThinkPads */ 3256 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3257 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3258 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3259 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3260 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3261 3262 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3263 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3264 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3265 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3266 3267 /* These should be enabled --only-- when ACPI video 3268 * is disabled (i.e. in "vendor" mode), and are handled 3269 * in a special way by the init code */ 3270 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3271 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3272 3273 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3274 3275 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3276 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3277 3278 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3279 * react to it and reprograms the built-in *extra* mixer. 3280 * Never map it to control another mixer by default. 3281 * 3282 * T60?, T61, R60?, R61: firmware and EC tries to send 3283 * these over the regular keyboard, so these are no-ops, 3284 * but there are still weird bugs re. MUTE, so do not 3285 * change unless you get test reports from all Lenovo 3286 * models. May cause the BIOS to interfere with the 3287 * HDA mixer. 3288 */ 3289 KEY_RESERVED, /* 0x14: VOLUME UP */ 3290 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3291 KEY_RESERVED, /* 0x16: MUTE */ 3292 3293 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3294 3295 /* (assignments unknown, please report if found) */ 3296 KEY_UNKNOWN, KEY_UNKNOWN, 3297 3298 /* 3299 * The mic mute button only sends 0x1a. It does not 3300 * automatically mute the mic or change the mute light. 3301 */ 3302 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3303 3304 /* (assignments unknown, please report if found) */ 3305 KEY_UNKNOWN, 3306 3307 /* Extra keys in use since the X240 / T440 / T540 */ 3308 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3309 3310 /* 3311 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3312 * The first item in this list is the Mute button which is 3313 * emitted with 0x103 through 3314 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3315 * symbol is held. 3316 * We'll need to offset those by 0x20. 3317 */ 3318 KEY_RESERVED, /* Mute held, 0x103 */ 3319 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3320 KEY_RESERVED, /* Clipping tool */ 3321 KEY_RESERVED, /* Cloud */ 3322 KEY_RESERVED, 3323 KEY_VOICECOMMAND, /* Voice */ 3324 KEY_RESERVED, 3325 KEY_RESERVED, /* Gestures */ 3326 KEY_RESERVED, 3327 KEY_RESERVED, 3328 KEY_RESERVED, 3329 KEY_CONFIG, /* Settings */ 3330 KEY_RESERVED, /* New tab */ 3331 KEY_REFRESH, /* Reload */ 3332 KEY_BACK, /* Back */ 3333 KEY_RESERVED, /* Microphone down */ 3334 KEY_RESERVED, /* Microphone up */ 3335 KEY_RESERVED, /* Microphone cancellation */ 3336 KEY_RESERVED, /* Camera mode */ 3337 KEY_RESERVED, /* Rotate display, 0x116 */ 3338 }, 3339 }; 3340 3341 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3342 /* Generic maps (fallback) */ 3343 { 3344 .vendor = PCI_VENDOR_ID_IBM, 3345 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3346 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3347 }, 3348 { 3349 .vendor = PCI_VENDOR_ID_LENOVO, 3350 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3351 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3352 }, 3353 }; 3354 3355 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3356 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3357 3358 int res, i; 3359 int status; 3360 int hkeyv; 3361 bool radiosw_state = false; 3362 bool tabletsw_state = false; 3363 3364 unsigned long quirks; 3365 unsigned long keymap_id; 3366 3367 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3368 "initializing hotkey subdriver\n"); 3369 3370 BUG_ON(!tpacpi_inputdev); 3371 BUG_ON(tpacpi_inputdev->open != NULL || 3372 tpacpi_inputdev->close != NULL); 3373 3374 TPACPI_ACPIHANDLE_INIT(hkey); 3375 mutex_init(&hotkey_mutex); 3376 3377 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3378 mutex_init(&hotkey_thread_data_mutex); 3379 #endif 3380 3381 /* hotkey not supported on 570 */ 3382 tp_features.hotkey = hkey_handle != NULL; 3383 3384 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3385 "hotkeys are %s\n", 3386 str_supported(tp_features.hotkey)); 3387 3388 if (!tp_features.hotkey) 3389 return 1; 3390 3391 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3392 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3393 3394 tpacpi_disable_brightness_delay(); 3395 3396 /* MUST have enough space for all attributes to be added to 3397 * hotkey_dev_attributes */ 3398 hotkey_dev_attributes = create_attr_set( 3399 ARRAY_SIZE(hotkey_attributes) + 2, 3400 NULL); 3401 if (!hotkey_dev_attributes) 3402 return -ENOMEM; 3403 res = add_many_to_attr_set(hotkey_dev_attributes, 3404 hotkey_attributes, 3405 ARRAY_SIZE(hotkey_attributes)); 3406 if (res) 3407 goto err_exit; 3408 3409 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3410 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3411 for HKEY interface version 0x100 */ 3412 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3413 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3414 "firmware HKEY interface version: 0x%x\n", 3415 hkeyv); 3416 3417 switch (hkeyv >> 8) { 3418 case 1: 3419 /* 3420 * MHKV 0x100 in A31, R40, R40e, 3421 * T4x, X31, and later 3422 */ 3423 3424 /* Paranoia check AND init hotkey_all_mask */ 3425 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3426 "MHKA", "qd")) { 3427 pr_err("missing MHKA handler, please report this to %s\n", 3428 TPACPI_MAIL); 3429 /* Fallback: pre-init for FN+F3,F4,F12 */ 3430 hotkey_all_mask = 0x080cU; 3431 } else { 3432 tp_features.hotkey_mask = 1; 3433 } 3434 break; 3435 3436 case 2: 3437 /* 3438 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3439 */ 3440 3441 /* Paranoia check AND init hotkey_all_mask */ 3442 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3443 "MHKA", "dd", 1)) { 3444 pr_err("missing MHKA handler, please report this to %s\n", 3445 TPACPI_MAIL); 3446 /* Fallback: pre-init for FN+F3,F4,F12 */ 3447 hotkey_all_mask = 0x080cU; 3448 } else { 3449 tp_features.hotkey_mask = 1; 3450 } 3451 3452 /* 3453 * Check if we have an adaptive keyboard, like on the 3454 * Lenovo Carbon X1 2014 (2nd Gen). 3455 */ 3456 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3457 "MHKA", "dd", 2)) { 3458 if (hotkey_adaptive_all_mask != 0) { 3459 tp_features.has_adaptive_kbd = true; 3460 res = sysfs_create_group( 3461 &tpacpi_pdev->dev.kobj, 3462 &adaptive_kbd_attr_group); 3463 if (res) 3464 goto err_exit; 3465 } 3466 } else { 3467 tp_features.has_adaptive_kbd = false; 3468 hotkey_adaptive_all_mask = 0x0U; 3469 } 3470 break; 3471 3472 default: 3473 pr_err("unknown version of the HKEY interface: 0x%x\n", 3474 hkeyv); 3475 pr_err("please report this to %s\n", TPACPI_MAIL); 3476 break; 3477 } 3478 } 3479 3480 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3481 "hotkey masks are %s\n", 3482 str_supported(tp_features.hotkey_mask)); 3483 3484 /* Init hotkey_all_mask if not initialized yet */ 3485 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3486 (quirks & TPACPI_HK_Q_INIMASK)) 3487 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3488 3489 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3490 if (tp_features.hotkey_mask) { 3491 /* hotkey_source_mask *must* be zero for 3492 * the first hotkey_mask_get to return hotkey_orig_mask */ 3493 res = hotkey_mask_get(); 3494 if (res) 3495 goto err_exit; 3496 3497 hotkey_orig_mask = hotkey_acpi_mask; 3498 } else { 3499 hotkey_orig_mask = hotkey_all_mask; 3500 hotkey_acpi_mask = hotkey_all_mask; 3501 } 3502 3503 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3504 if (dbg_wlswemul) { 3505 tp_features.hotkey_wlsw = 1; 3506 radiosw_state = !!tpacpi_wlsw_emulstate; 3507 pr_info("radio switch emulation enabled\n"); 3508 } else 3509 #endif 3510 /* Not all thinkpads have a hardware radio switch */ 3511 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3512 tp_features.hotkey_wlsw = 1; 3513 radiosw_state = !!status; 3514 pr_info("radio switch found; radios are %s\n", 3515 enabled(status, 0)); 3516 } 3517 if (tp_features.hotkey_wlsw) 3518 res = add_to_attr_set(hotkey_dev_attributes, 3519 &dev_attr_hotkey_radio_sw.attr); 3520 3521 res = hotkey_init_tablet_mode(); 3522 if (res < 0) 3523 goto err_exit; 3524 3525 tabletsw_state = res; 3526 3527 res = register_attr_set_with_sysfs(hotkey_dev_attributes, 3528 &tpacpi_pdev->dev.kobj); 3529 if (res) 3530 goto err_exit; 3531 3532 /* Set up key map */ 3533 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3534 GFP_KERNEL); 3535 if (!hotkey_keycode_map) { 3536 pr_err("failed to allocate memory for key map\n"); 3537 res = -ENOMEM; 3538 goto err_exit; 3539 } 3540 3541 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3542 ARRAY_SIZE(tpacpi_keymap_qtable)); 3543 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3544 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3545 "using keymap number %lu\n", keymap_id); 3546 3547 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3548 TPACPI_HOTKEY_MAP_SIZE); 3549 3550 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3551 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3552 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3553 tpacpi_inputdev->keycode = hotkey_keycode_map; 3554 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3555 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3556 input_set_capability(tpacpi_inputdev, EV_KEY, 3557 hotkey_keycode_map[i]); 3558 } else { 3559 if (i < sizeof(hotkey_reserved_mask)*8) 3560 hotkey_reserved_mask |= 1 << i; 3561 } 3562 } 3563 3564 if (tp_features.hotkey_wlsw) { 3565 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3566 input_report_switch(tpacpi_inputdev, 3567 SW_RFKILL_ALL, radiosw_state); 3568 } 3569 if (tp_features.hotkey_tablet) { 3570 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3571 input_report_switch(tpacpi_inputdev, 3572 SW_TABLET_MODE, tabletsw_state); 3573 } 3574 3575 /* Do not issue duplicate brightness change events to 3576 * userspace. tpacpi_detect_brightness_capabilities() must have 3577 * been called before this point */ 3578 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3579 pr_info("This ThinkPad has standard ACPI backlight " 3580 "brightness control, supported by the ACPI " 3581 "video driver\n"); 3582 pr_notice("Disabling thinkpad-acpi brightness events " 3583 "by default...\n"); 3584 3585 /* Disable brightness up/down on Lenovo thinkpads when 3586 * ACPI is handling them, otherwise it is plain impossible 3587 * for userspace to do something even remotely sane */ 3588 hotkey_reserved_mask |= 3589 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3590 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3591 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3592 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3593 } 3594 3595 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3596 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3597 & ~hotkey_all_mask 3598 & ~hotkey_reserved_mask; 3599 3600 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3601 "hotkey source mask 0x%08x, polling freq %u\n", 3602 hotkey_source_mask, hotkey_poll_freq); 3603 #endif 3604 3605 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3606 "enabling firmware HKEY event interface...\n"); 3607 res = hotkey_status_set(true); 3608 if (res) { 3609 hotkey_exit(); 3610 return res; 3611 } 3612 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3613 | hotkey_driver_mask) 3614 & ~hotkey_source_mask); 3615 if (res < 0 && res != -ENXIO) { 3616 hotkey_exit(); 3617 return res; 3618 } 3619 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3620 & ~hotkey_reserved_mask; 3621 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3622 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3623 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3624 3625 tpacpi_inputdev->open = &hotkey_inputdev_open; 3626 tpacpi_inputdev->close = &hotkey_inputdev_close; 3627 3628 hotkey_poll_setup_safe(true); 3629 3630 return 0; 3631 3632 err_exit: 3633 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3634 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3635 &adaptive_kbd_attr_group); 3636 3637 hotkey_dev_attributes = NULL; 3638 3639 return (res < 0) ? res : 1; 3640 } 3641 3642 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3643 * mode, Web conference mode, Function mode and Lay-flat mode. 3644 * We support Home mode and Function mode currently. 3645 * 3646 * Will consider support rest of modes in future. 3647 * 3648 */ 3649 static const int adaptive_keyboard_modes[] = { 3650 HOME_MODE, 3651 /* WEB_BROWSER_MODE = 2, 3652 WEB_CONFERENCE_MODE = 3, */ 3653 FUNCTION_MODE 3654 }; 3655 3656 #define DFR_CHANGE_ROW 0x101 3657 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3658 #define FIRST_ADAPTIVE_KEY 0x103 3659 #define ADAPTIVE_KEY_OFFSET 0x020 3660 3661 /* press Fn key a while second, it will switch to Function Mode. Then 3662 * release Fn key, previous mode be restored. 3663 */ 3664 static bool adaptive_keyboard_mode_is_saved; 3665 static int adaptive_keyboard_prev_mode; 3666 3667 static int adaptive_keyboard_get_mode(void) 3668 { 3669 int mode = 0; 3670 3671 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3672 pr_err("Cannot read adaptive keyboard mode\n"); 3673 return -EIO; 3674 } 3675 3676 return mode; 3677 } 3678 3679 static int adaptive_keyboard_set_mode(int new_mode) 3680 { 3681 if (new_mode < 0 || 3682 new_mode > LAYFLAT_MODE) 3683 return -EINVAL; 3684 3685 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3686 pr_err("Cannot set adaptive keyboard mode\n"); 3687 return -EIO; 3688 } 3689 3690 return 0; 3691 } 3692 3693 static int adaptive_keyboard_get_next_mode(int mode) 3694 { 3695 size_t i; 3696 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3697 3698 for (i = 0; i <= max_mode; i++) { 3699 if (adaptive_keyboard_modes[i] == mode) 3700 break; 3701 } 3702 3703 if (i >= max_mode) 3704 i = 0; 3705 else 3706 i++; 3707 3708 return adaptive_keyboard_modes[i]; 3709 } 3710 3711 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3712 { 3713 int current_mode = 0; 3714 int new_mode = 0; 3715 int keycode; 3716 3717 switch (scancode) { 3718 case DFR_CHANGE_ROW: 3719 if (adaptive_keyboard_mode_is_saved) { 3720 new_mode = adaptive_keyboard_prev_mode; 3721 adaptive_keyboard_mode_is_saved = false; 3722 } else { 3723 current_mode = adaptive_keyboard_get_mode(); 3724 if (current_mode < 0) 3725 return false; 3726 new_mode = adaptive_keyboard_get_next_mode( 3727 current_mode); 3728 } 3729 3730 if (adaptive_keyboard_set_mode(new_mode) < 0) 3731 return false; 3732 3733 return true; 3734 3735 case DFR_SHOW_QUICKVIEW_ROW: 3736 current_mode = adaptive_keyboard_get_mode(); 3737 if (current_mode < 0) 3738 return false; 3739 3740 adaptive_keyboard_prev_mode = current_mode; 3741 adaptive_keyboard_mode_is_saved = true; 3742 3743 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3744 return false; 3745 return true; 3746 3747 default: 3748 if (scancode < FIRST_ADAPTIVE_KEY || 3749 scancode >= FIRST_ADAPTIVE_KEY + TPACPI_HOTKEY_MAP_LEN - 3750 ADAPTIVE_KEY_OFFSET) { 3751 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3752 scancode); 3753 return false; 3754 } 3755 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + ADAPTIVE_KEY_OFFSET]; 3756 if (keycode != KEY_RESERVED) { 3757 mutex_lock(&tpacpi_inputdev_send_mutex); 3758 3759 input_report_key(tpacpi_inputdev, keycode, 1); 3760 input_sync(tpacpi_inputdev); 3761 3762 input_report_key(tpacpi_inputdev, keycode, 0); 3763 input_sync(tpacpi_inputdev); 3764 3765 mutex_unlock(&tpacpi_inputdev_send_mutex); 3766 } 3767 return true; 3768 } 3769 } 3770 3771 static bool hotkey_notify_hotkey(const u32 hkey, 3772 bool *send_acpi_ev, 3773 bool *ignore_acpi_ev) 3774 { 3775 /* 0x1000-0x1FFF: key presses */ 3776 unsigned int scancode = hkey & 0xfff; 3777 *send_acpi_ev = true; 3778 *ignore_acpi_ev = false; 3779 3780 /* HKEY event 0x1001 is scancode 0x00 */ 3781 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3782 scancode--; 3783 if (!(hotkey_source_mask & (1 << scancode))) { 3784 tpacpi_input_send_key_masked(scancode); 3785 *send_acpi_ev = false; 3786 } else { 3787 *ignore_acpi_ev = true; 3788 } 3789 return true; 3790 } else { 3791 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3792 } 3793 return false; 3794 } 3795 3796 static bool hotkey_notify_wakeup(const u32 hkey, 3797 bool *send_acpi_ev, 3798 bool *ignore_acpi_ev) 3799 { 3800 /* 0x2000-0x2FFF: Wakeup reason */ 3801 *send_acpi_ev = true; 3802 *ignore_acpi_ev = false; 3803 3804 switch (hkey) { 3805 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3806 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3807 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3808 *ignore_acpi_ev = true; 3809 break; 3810 3811 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3812 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3813 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3814 *ignore_acpi_ev = true; 3815 break; 3816 3817 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3818 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3819 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3820 /* how to auto-heal: */ 3821 /* 2313: woke up from S3, go to S4/S5 */ 3822 /* 2413: woke up from S4, go to S5 */ 3823 break; 3824 3825 default: 3826 return false; 3827 } 3828 3829 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3830 pr_info("woke up due to a hot-unplug request...\n"); 3831 hotkey_wakeup_reason_notify_change(); 3832 } 3833 return true; 3834 } 3835 3836 static bool hotkey_notify_dockevent(const u32 hkey, 3837 bool *send_acpi_ev, 3838 bool *ignore_acpi_ev) 3839 { 3840 /* 0x4000-0x4FFF: dock-related events */ 3841 *send_acpi_ev = true; 3842 *ignore_acpi_ev = false; 3843 3844 switch (hkey) { 3845 case TP_HKEY_EV_UNDOCK_ACK: 3846 /* ACPI undock operation completed after wakeup */ 3847 hotkey_autosleep_ack = 1; 3848 pr_info("undocked\n"); 3849 hotkey_wakeup_hotunplug_complete_notify_change(); 3850 return true; 3851 3852 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3853 pr_info("docked into hotplug port replicator\n"); 3854 return true; 3855 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3856 pr_info("undocked from hotplug port replicator\n"); 3857 return true; 3858 3859 default: 3860 return false; 3861 } 3862 } 3863 3864 static bool hotkey_notify_usrevent(const u32 hkey, 3865 bool *send_acpi_ev, 3866 bool *ignore_acpi_ev) 3867 { 3868 /* 0x5000-0x5FFF: human interface helpers */ 3869 *send_acpi_ev = true; 3870 *ignore_acpi_ev = false; 3871 3872 switch (hkey) { 3873 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3874 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3875 return true; 3876 3877 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3878 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3879 tpacpi_input_send_tabletsw(); 3880 hotkey_tablet_mode_notify_change(); 3881 *send_acpi_ev = false; 3882 return true; 3883 3884 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3885 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3886 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3887 /* do not propagate these events */ 3888 *ignore_acpi_ev = true; 3889 return true; 3890 3891 default: 3892 return false; 3893 } 3894 } 3895 3896 static void thermal_dump_all_sensors(void); 3897 3898 static bool hotkey_notify_6xxx(const u32 hkey, 3899 bool *send_acpi_ev, 3900 bool *ignore_acpi_ev) 3901 { 3902 bool known = true; 3903 3904 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 3905 *send_acpi_ev = true; 3906 *ignore_acpi_ev = false; 3907 3908 switch (hkey) { 3909 case TP_HKEY_EV_THM_TABLE_CHANGED: 3910 pr_info("EC reports that Thermal Table has changed\n"); 3911 /* recommended action: do nothing, we don't have 3912 * Lenovo ATM information */ 3913 return true; 3914 case TP_HKEY_EV_ALARM_BAT_HOT: 3915 pr_crit("THERMAL ALARM: battery is too hot!\n"); 3916 /* recommended action: warn user through gui */ 3917 break; 3918 case TP_HKEY_EV_ALARM_BAT_XHOT: 3919 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 3920 /* recommended action: immediate sleep/hibernate */ 3921 break; 3922 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3923 pr_crit("THERMAL ALARM: " 3924 "a sensor reports something is too hot!\n"); 3925 /* recommended action: warn user through gui, that */ 3926 /* some internal component is too hot */ 3927 break; 3928 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3929 pr_alert("THERMAL EMERGENCY: " 3930 "a sensor reports something is extremely hot!\n"); 3931 /* recommended action: immediate sleep/hibernate */ 3932 break; 3933 case TP_HKEY_EV_AC_CHANGED: 3934 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 3935 * AC status changed; can be triggered by plugging or 3936 * unplugging AC adapter, docking or undocking. */ 3937 3938 /* fallthrough */ 3939 3940 case TP_HKEY_EV_KEY_NUMLOCK: 3941 case TP_HKEY_EV_KEY_FN: 3942 case TP_HKEY_EV_KEY_FN_ESC: 3943 /* key press events, we just ignore them as long as the EC 3944 * is still reporting them in the normal keyboard stream */ 3945 *send_acpi_ev = false; 3946 *ignore_acpi_ev = true; 3947 return true; 3948 3949 case TP_HKEY_EV_TABLET_CHANGED: 3950 tpacpi_input_send_tabletsw(); 3951 hotkey_tablet_mode_notify_change(); 3952 *send_acpi_ev = false; 3953 break; 3954 3955 default: 3956 pr_warn("unknown possible thermal alarm or keyboard event received\n"); 3957 known = false; 3958 } 3959 3960 thermal_dump_all_sensors(); 3961 3962 return known; 3963 } 3964 3965 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3966 { 3967 u32 hkey; 3968 bool send_acpi_ev; 3969 bool ignore_acpi_ev; 3970 bool known_ev; 3971 3972 if (event != 0x80) { 3973 pr_err("unknown HKEY notification event %d\n", event); 3974 /* forward it to userspace, maybe it knows how to handle it */ 3975 acpi_bus_generate_netlink_event( 3976 ibm->acpi->device->pnp.device_class, 3977 dev_name(&ibm->acpi->device->dev), 3978 event, 0); 3979 return; 3980 } 3981 3982 while (1) { 3983 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3984 pr_err("failed to retrieve HKEY event\n"); 3985 return; 3986 } 3987 3988 if (hkey == 0) { 3989 /* queue empty */ 3990 return; 3991 } 3992 3993 send_acpi_ev = true; 3994 ignore_acpi_ev = false; 3995 3996 switch (hkey >> 12) { 3997 case 1: 3998 /* 0x1000-0x1FFF: key presses */ 3999 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 4000 &ignore_acpi_ev); 4001 break; 4002 case 2: 4003 /* 0x2000-0x2FFF: Wakeup reason */ 4004 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 4005 &ignore_acpi_ev); 4006 break; 4007 case 3: 4008 /* 0x3000-0x3FFF: bay-related wakeups */ 4009 switch (hkey) { 4010 case TP_HKEY_EV_BAYEJ_ACK: 4011 hotkey_autosleep_ack = 1; 4012 pr_info("bay ejected\n"); 4013 hotkey_wakeup_hotunplug_complete_notify_change(); 4014 known_ev = true; 4015 break; 4016 case TP_HKEY_EV_OPTDRV_EJ: 4017 /* FIXME: kick libata if SATA link offline */ 4018 known_ev = true; 4019 break; 4020 default: 4021 known_ev = false; 4022 } 4023 break; 4024 case 4: 4025 /* 0x4000-0x4FFF: dock-related events */ 4026 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 4027 &ignore_acpi_ev); 4028 break; 4029 case 5: 4030 /* 0x5000-0x5FFF: human interface helpers */ 4031 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 4032 &ignore_acpi_ev); 4033 break; 4034 case 6: 4035 /* 0x6000-0x6FFF: thermal alarms/notices and 4036 * keyboard events */ 4037 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 4038 &ignore_acpi_ev); 4039 break; 4040 case 7: 4041 /* 0x7000-0x7FFF: misc */ 4042 if (tp_features.hotkey_wlsw && 4043 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 4044 tpacpi_send_radiosw_update(); 4045 send_acpi_ev = 0; 4046 known_ev = true; 4047 break; 4048 } 4049 /* fallthrough to default */ 4050 default: 4051 known_ev = false; 4052 } 4053 if (!known_ev) { 4054 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4055 pr_notice("please report the conditions when this " 4056 "event happened to %s\n", TPACPI_MAIL); 4057 } 4058 4059 /* netlink events */ 4060 if (!ignore_acpi_ev && send_acpi_ev) { 4061 acpi_bus_generate_netlink_event( 4062 ibm->acpi->device->pnp.device_class, 4063 dev_name(&ibm->acpi->device->dev), 4064 event, hkey); 4065 } 4066 } 4067 } 4068 4069 static void hotkey_suspend(void) 4070 { 4071 /* Do these on suspend, we get the events on early resume! */ 4072 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4073 hotkey_autosleep_ack = 0; 4074 4075 /* save previous mode of adaptive keyboard of X1 Carbon */ 4076 if (tp_features.has_adaptive_kbd) { 4077 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4078 "GTRW", "dd", 0)) { 4079 pr_err("Cannot read adaptive keyboard mode.\n"); 4080 } 4081 } 4082 } 4083 4084 static void hotkey_resume(void) 4085 { 4086 tpacpi_disable_brightness_delay(); 4087 4088 if (hotkey_status_set(true) < 0 || 4089 hotkey_mask_set(hotkey_acpi_mask) < 0) 4090 pr_err("error while attempting to reset the event " 4091 "firmware interface\n"); 4092 4093 tpacpi_send_radiosw_update(); 4094 hotkey_tablet_mode_notify_change(); 4095 hotkey_wakeup_reason_notify_change(); 4096 hotkey_wakeup_hotunplug_complete_notify_change(); 4097 hotkey_poll_setup_safe(false); 4098 4099 /* restore previous mode of adapive keyboard of X1 Carbon */ 4100 if (tp_features.has_adaptive_kbd) { 4101 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4102 adaptive_keyboard_prev_mode)) { 4103 pr_err("Cannot set adaptive keyboard mode.\n"); 4104 } 4105 } 4106 } 4107 4108 /* procfs -------------------------------------------------------------- */ 4109 static int hotkey_read(struct seq_file *m) 4110 { 4111 int res, status; 4112 4113 if (!tp_features.hotkey) { 4114 seq_printf(m, "status:\t\tnot supported\n"); 4115 return 0; 4116 } 4117 4118 if (mutex_lock_killable(&hotkey_mutex)) 4119 return -ERESTARTSYS; 4120 res = hotkey_status_get(&status); 4121 if (!res) 4122 res = hotkey_mask_get(); 4123 mutex_unlock(&hotkey_mutex); 4124 if (res) 4125 return res; 4126 4127 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4128 if (hotkey_all_mask) { 4129 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4130 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4131 } else { 4132 seq_printf(m, "mask:\t\tnot supported\n"); 4133 seq_printf(m, "commands:\tenable, disable, reset\n"); 4134 } 4135 4136 return 0; 4137 } 4138 4139 static void hotkey_enabledisable_warn(bool enable) 4140 { 4141 tpacpi_log_usertask("procfs hotkey enable/disable"); 4142 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4143 pr_fmt("hotkey enable/disable functionality has been " 4144 "removed from the driver. " 4145 "Hotkeys are always enabled.\n"))) 4146 pr_err("Please remove the hotkey=enable module " 4147 "parameter, it is deprecated. " 4148 "Hotkeys are always enabled.\n"); 4149 } 4150 4151 static int hotkey_write(char *buf) 4152 { 4153 int res; 4154 u32 mask; 4155 char *cmd; 4156 4157 if (!tp_features.hotkey) 4158 return -ENODEV; 4159 4160 if (mutex_lock_killable(&hotkey_mutex)) 4161 return -ERESTARTSYS; 4162 4163 mask = hotkey_user_mask; 4164 4165 res = 0; 4166 while ((cmd = next_cmd(&buf))) { 4167 if (strlencmp(cmd, "enable") == 0) { 4168 hotkey_enabledisable_warn(1); 4169 } else if (strlencmp(cmd, "disable") == 0) { 4170 hotkey_enabledisable_warn(0); 4171 res = -EPERM; 4172 } else if (strlencmp(cmd, "reset") == 0) { 4173 mask = (hotkey_all_mask | hotkey_source_mask) 4174 & ~hotkey_reserved_mask; 4175 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4176 /* mask set */ 4177 } else if (sscanf(cmd, "%x", &mask) == 1) { 4178 /* mask set */ 4179 } else { 4180 res = -EINVAL; 4181 goto errexit; 4182 } 4183 } 4184 4185 if (!res) { 4186 tpacpi_disclose_usertask("procfs hotkey", 4187 "set mask to 0x%08x\n", mask); 4188 res = hotkey_user_mask_set(mask); 4189 } 4190 4191 errexit: 4192 mutex_unlock(&hotkey_mutex); 4193 return res; 4194 } 4195 4196 static const struct acpi_device_id ibm_htk_device_ids[] = { 4197 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4198 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4199 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0}, 4200 {"", 0}, 4201 }; 4202 4203 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4204 .hid = ibm_htk_device_ids, 4205 .notify = hotkey_notify, 4206 .handle = &hkey_handle, 4207 .type = ACPI_DEVICE_NOTIFY, 4208 }; 4209 4210 static struct ibm_struct hotkey_driver_data = { 4211 .name = "hotkey", 4212 .read = hotkey_read, 4213 .write = hotkey_write, 4214 .exit = hotkey_exit, 4215 .resume = hotkey_resume, 4216 .suspend = hotkey_suspend, 4217 .acpi = &ibm_hotkey_acpidriver, 4218 }; 4219 4220 /************************************************************************* 4221 * Bluetooth subdriver 4222 */ 4223 4224 enum { 4225 /* ACPI GBDC/SBDC bits */ 4226 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4227 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4228 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4229 0 = disable, 1 = enable */ 4230 }; 4231 4232 enum { 4233 /* ACPI \BLTH commands */ 4234 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4235 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4236 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4237 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4238 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4239 }; 4240 4241 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4242 4243 static int bluetooth_get_status(void) 4244 { 4245 int status; 4246 4247 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4248 if (dbg_bluetoothemul) 4249 return (tpacpi_bluetooth_emulstate) ? 4250 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4251 #endif 4252 4253 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4254 return -EIO; 4255 4256 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4257 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4258 } 4259 4260 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4261 { 4262 int status; 4263 4264 vdbg_printk(TPACPI_DBG_RFKILL, 4265 "will attempt to %s bluetooth\n", 4266 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4267 4268 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4269 if (dbg_bluetoothemul) { 4270 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4271 return 0; 4272 } 4273 #endif 4274 4275 if (state == TPACPI_RFK_RADIO_ON) 4276 status = TP_ACPI_BLUETOOTH_RADIOSSW 4277 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4278 else 4279 status = 0; 4280 4281 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4282 return -EIO; 4283 4284 return 0; 4285 } 4286 4287 /* sysfs bluetooth enable ---------------------------------------------- */ 4288 static ssize_t bluetooth_enable_show(struct device *dev, 4289 struct device_attribute *attr, 4290 char *buf) 4291 { 4292 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4293 attr, buf); 4294 } 4295 4296 static ssize_t bluetooth_enable_store(struct device *dev, 4297 struct device_attribute *attr, 4298 const char *buf, size_t count) 4299 { 4300 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4301 attr, buf, count); 4302 } 4303 4304 static DEVICE_ATTR_RW(bluetooth_enable); 4305 4306 /* --------------------------------------------------------------------- */ 4307 4308 static struct attribute *bluetooth_attributes[] = { 4309 &dev_attr_bluetooth_enable.attr, 4310 NULL 4311 }; 4312 4313 static const struct attribute_group bluetooth_attr_group = { 4314 .attrs = bluetooth_attributes, 4315 }; 4316 4317 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4318 .get_status = bluetooth_get_status, 4319 .set_status = bluetooth_set_status, 4320 }; 4321 4322 static void bluetooth_shutdown(void) 4323 { 4324 /* Order firmware to save current state to NVRAM */ 4325 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4326 TP_ACPI_BLTH_SAVE_STATE)) 4327 pr_notice("failed to save bluetooth state to NVRAM\n"); 4328 else 4329 vdbg_printk(TPACPI_DBG_RFKILL, 4330 "bluetooth state saved to NVRAM\n"); 4331 } 4332 4333 static void bluetooth_exit(void) 4334 { 4335 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4336 &bluetooth_attr_group); 4337 4338 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4339 4340 bluetooth_shutdown(); 4341 } 4342 4343 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4344 { 4345 int res; 4346 int status = 0; 4347 4348 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4349 "initializing bluetooth subdriver\n"); 4350 4351 TPACPI_ACPIHANDLE_INIT(hkey); 4352 4353 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4354 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4355 tp_features.bluetooth = hkey_handle && 4356 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4357 4358 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4359 "bluetooth is %s, status 0x%02x\n", 4360 str_supported(tp_features.bluetooth), 4361 status); 4362 4363 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4364 if (dbg_bluetoothemul) { 4365 tp_features.bluetooth = 1; 4366 pr_info("bluetooth switch emulation enabled\n"); 4367 } else 4368 #endif 4369 if (tp_features.bluetooth && 4370 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4371 /* no bluetooth hardware present in system */ 4372 tp_features.bluetooth = 0; 4373 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4374 "bluetooth hardware not installed\n"); 4375 } 4376 4377 if (!tp_features.bluetooth) 4378 return 1; 4379 4380 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4381 &bluetooth_tprfk_ops, 4382 RFKILL_TYPE_BLUETOOTH, 4383 TPACPI_RFK_BLUETOOTH_SW_NAME, 4384 true); 4385 if (res) 4386 return res; 4387 4388 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4389 &bluetooth_attr_group); 4390 if (res) { 4391 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4392 return res; 4393 } 4394 4395 return 0; 4396 } 4397 4398 /* procfs -------------------------------------------------------------- */ 4399 static int bluetooth_read(struct seq_file *m) 4400 { 4401 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4402 } 4403 4404 static int bluetooth_write(char *buf) 4405 { 4406 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4407 } 4408 4409 static struct ibm_struct bluetooth_driver_data = { 4410 .name = "bluetooth", 4411 .read = bluetooth_read, 4412 .write = bluetooth_write, 4413 .exit = bluetooth_exit, 4414 .shutdown = bluetooth_shutdown, 4415 }; 4416 4417 /************************************************************************* 4418 * Wan subdriver 4419 */ 4420 4421 enum { 4422 /* ACPI GWAN/SWAN bits */ 4423 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4424 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4425 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4426 0 = disable, 1 = enable */ 4427 }; 4428 4429 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4430 4431 static int wan_get_status(void) 4432 { 4433 int status; 4434 4435 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4436 if (dbg_wwanemul) 4437 return (tpacpi_wwan_emulstate) ? 4438 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4439 #endif 4440 4441 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4442 return -EIO; 4443 4444 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4445 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4446 } 4447 4448 static int wan_set_status(enum tpacpi_rfkill_state state) 4449 { 4450 int status; 4451 4452 vdbg_printk(TPACPI_DBG_RFKILL, 4453 "will attempt to %s wwan\n", 4454 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4455 4456 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4457 if (dbg_wwanemul) { 4458 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4459 return 0; 4460 } 4461 #endif 4462 4463 if (state == TPACPI_RFK_RADIO_ON) 4464 status = TP_ACPI_WANCARD_RADIOSSW 4465 | TP_ACPI_WANCARD_RESUMECTRL; 4466 else 4467 status = 0; 4468 4469 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4470 return -EIO; 4471 4472 return 0; 4473 } 4474 4475 /* sysfs wan enable ---------------------------------------------------- */ 4476 static ssize_t wan_enable_show(struct device *dev, 4477 struct device_attribute *attr, 4478 char *buf) 4479 { 4480 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4481 attr, buf); 4482 } 4483 4484 static ssize_t wan_enable_store(struct device *dev, 4485 struct device_attribute *attr, 4486 const char *buf, size_t count) 4487 { 4488 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4489 attr, buf, count); 4490 } 4491 4492 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4493 wan_enable_show, wan_enable_store); 4494 4495 /* --------------------------------------------------------------------- */ 4496 4497 static struct attribute *wan_attributes[] = { 4498 &dev_attr_wwan_enable.attr, 4499 NULL 4500 }; 4501 4502 static const struct attribute_group wan_attr_group = { 4503 .attrs = wan_attributes, 4504 }; 4505 4506 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4507 .get_status = wan_get_status, 4508 .set_status = wan_set_status, 4509 }; 4510 4511 static void wan_shutdown(void) 4512 { 4513 /* Order firmware to save current state to NVRAM */ 4514 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4515 TP_ACPI_WGSV_SAVE_STATE)) 4516 pr_notice("failed to save WWAN state to NVRAM\n"); 4517 else 4518 vdbg_printk(TPACPI_DBG_RFKILL, 4519 "WWAN state saved to NVRAM\n"); 4520 } 4521 4522 static void wan_exit(void) 4523 { 4524 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4525 &wan_attr_group); 4526 4527 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4528 4529 wan_shutdown(); 4530 } 4531 4532 static int __init wan_init(struct ibm_init_struct *iibm) 4533 { 4534 int res; 4535 int status = 0; 4536 4537 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4538 "initializing wan subdriver\n"); 4539 4540 TPACPI_ACPIHANDLE_INIT(hkey); 4541 4542 tp_features.wan = hkey_handle && 4543 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4544 4545 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4546 "wan is %s, status 0x%02x\n", 4547 str_supported(tp_features.wan), 4548 status); 4549 4550 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4551 if (dbg_wwanemul) { 4552 tp_features.wan = 1; 4553 pr_info("wwan switch emulation enabled\n"); 4554 } else 4555 #endif 4556 if (tp_features.wan && 4557 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4558 /* no wan hardware present in system */ 4559 tp_features.wan = 0; 4560 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4561 "wan hardware not installed\n"); 4562 } 4563 4564 if (!tp_features.wan) 4565 return 1; 4566 4567 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4568 &wan_tprfk_ops, 4569 RFKILL_TYPE_WWAN, 4570 TPACPI_RFK_WWAN_SW_NAME, 4571 true); 4572 if (res) 4573 return res; 4574 4575 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4576 &wan_attr_group); 4577 4578 if (res) { 4579 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4580 return res; 4581 } 4582 4583 return 0; 4584 } 4585 4586 /* procfs -------------------------------------------------------------- */ 4587 static int wan_read(struct seq_file *m) 4588 { 4589 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4590 } 4591 4592 static int wan_write(char *buf) 4593 { 4594 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4595 } 4596 4597 static struct ibm_struct wan_driver_data = { 4598 .name = "wan", 4599 .read = wan_read, 4600 .write = wan_write, 4601 .exit = wan_exit, 4602 .shutdown = wan_shutdown, 4603 }; 4604 4605 /************************************************************************* 4606 * UWB subdriver 4607 */ 4608 4609 enum { 4610 /* ACPI GUWB/SUWB bits */ 4611 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4612 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4613 }; 4614 4615 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4616 4617 static int uwb_get_status(void) 4618 { 4619 int status; 4620 4621 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4622 if (dbg_uwbemul) 4623 return (tpacpi_uwb_emulstate) ? 4624 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4625 #endif 4626 4627 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4628 return -EIO; 4629 4630 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4631 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4632 } 4633 4634 static int uwb_set_status(enum tpacpi_rfkill_state state) 4635 { 4636 int status; 4637 4638 vdbg_printk(TPACPI_DBG_RFKILL, 4639 "will attempt to %s UWB\n", 4640 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4641 4642 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4643 if (dbg_uwbemul) { 4644 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4645 return 0; 4646 } 4647 #endif 4648 4649 if (state == TPACPI_RFK_RADIO_ON) 4650 status = TP_ACPI_UWB_RADIOSSW; 4651 else 4652 status = 0; 4653 4654 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4655 return -EIO; 4656 4657 return 0; 4658 } 4659 4660 /* --------------------------------------------------------------------- */ 4661 4662 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4663 .get_status = uwb_get_status, 4664 .set_status = uwb_set_status, 4665 }; 4666 4667 static void uwb_exit(void) 4668 { 4669 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4670 } 4671 4672 static int __init uwb_init(struct ibm_init_struct *iibm) 4673 { 4674 int res; 4675 int status = 0; 4676 4677 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4678 "initializing uwb subdriver\n"); 4679 4680 TPACPI_ACPIHANDLE_INIT(hkey); 4681 4682 tp_features.uwb = hkey_handle && 4683 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4684 4685 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4686 "uwb is %s, status 0x%02x\n", 4687 str_supported(tp_features.uwb), 4688 status); 4689 4690 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4691 if (dbg_uwbemul) { 4692 tp_features.uwb = 1; 4693 pr_info("uwb switch emulation enabled\n"); 4694 } else 4695 #endif 4696 if (tp_features.uwb && 4697 !(status & TP_ACPI_UWB_HWPRESENT)) { 4698 /* no uwb hardware present in system */ 4699 tp_features.uwb = 0; 4700 dbg_printk(TPACPI_DBG_INIT, 4701 "uwb hardware not installed\n"); 4702 } 4703 4704 if (!tp_features.uwb) 4705 return 1; 4706 4707 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4708 &uwb_tprfk_ops, 4709 RFKILL_TYPE_UWB, 4710 TPACPI_RFK_UWB_SW_NAME, 4711 false); 4712 return res; 4713 } 4714 4715 static struct ibm_struct uwb_driver_data = { 4716 .name = "uwb", 4717 .exit = uwb_exit, 4718 .flags.experimental = 1, 4719 }; 4720 4721 /************************************************************************* 4722 * Video subdriver 4723 */ 4724 4725 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4726 4727 enum video_access_mode { 4728 TPACPI_VIDEO_NONE = 0, 4729 TPACPI_VIDEO_570, /* 570 */ 4730 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4731 TPACPI_VIDEO_NEW, /* all others */ 4732 }; 4733 4734 enum { /* video status flags, based on VIDEO_570 */ 4735 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4736 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4737 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4738 }; 4739 4740 enum { /* TPACPI_VIDEO_570 constants */ 4741 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4742 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4743 * video_status_flags */ 4744 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4745 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4746 }; 4747 4748 static enum video_access_mode video_supported; 4749 static int video_orig_autosw; 4750 4751 static int video_autosw_get(void); 4752 static int video_autosw_set(int enable); 4753 4754 TPACPI_HANDLE(vid, root, 4755 "\\_SB.PCI.AGP.VGA", /* 570 */ 4756 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4757 "\\_SB.PCI0.VID0", /* 770e */ 4758 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4759 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4760 "\\_SB.PCI0.AGP.VID", /* all others */ 4761 ); /* R30, R31 */ 4762 4763 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4764 4765 static int __init video_init(struct ibm_init_struct *iibm) 4766 { 4767 int ivga; 4768 4769 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4770 4771 TPACPI_ACPIHANDLE_INIT(vid); 4772 if (tpacpi_is_ibm()) 4773 TPACPI_ACPIHANDLE_INIT(vid2); 4774 4775 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4776 /* G41, assume IVGA doesn't change */ 4777 vid_handle = vid2_handle; 4778 4779 if (!vid_handle) 4780 /* video switching not supported on R30, R31 */ 4781 video_supported = TPACPI_VIDEO_NONE; 4782 else if (tpacpi_is_ibm() && 4783 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4784 /* 570 */ 4785 video_supported = TPACPI_VIDEO_570; 4786 else if (tpacpi_is_ibm() && 4787 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4788 /* 600e/x, 770e, 770x */ 4789 video_supported = TPACPI_VIDEO_770; 4790 else 4791 /* all others */ 4792 video_supported = TPACPI_VIDEO_NEW; 4793 4794 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4795 str_supported(video_supported != TPACPI_VIDEO_NONE), 4796 video_supported); 4797 4798 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 4799 } 4800 4801 static void video_exit(void) 4802 { 4803 dbg_printk(TPACPI_DBG_EXIT, 4804 "restoring original video autoswitch mode\n"); 4805 if (video_autosw_set(video_orig_autosw)) 4806 pr_err("error while trying to restore original " 4807 "video autoswitch mode\n"); 4808 } 4809 4810 static int video_outputsw_get(void) 4811 { 4812 int status = 0; 4813 int i; 4814 4815 switch (video_supported) { 4816 case TPACPI_VIDEO_570: 4817 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4818 TP_ACPI_VIDEO_570_PHSCMD)) 4819 return -EIO; 4820 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4821 break; 4822 case TPACPI_VIDEO_770: 4823 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4824 return -EIO; 4825 if (i) 4826 status |= TP_ACPI_VIDEO_S_LCD; 4827 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4828 return -EIO; 4829 if (i) 4830 status |= TP_ACPI_VIDEO_S_CRT; 4831 break; 4832 case TPACPI_VIDEO_NEW: 4833 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4834 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4835 return -EIO; 4836 if (i) 4837 status |= TP_ACPI_VIDEO_S_CRT; 4838 4839 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4840 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4841 return -EIO; 4842 if (i) 4843 status |= TP_ACPI_VIDEO_S_LCD; 4844 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4845 return -EIO; 4846 if (i) 4847 status |= TP_ACPI_VIDEO_S_DVI; 4848 break; 4849 default: 4850 return -ENOSYS; 4851 } 4852 4853 return status; 4854 } 4855 4856 static int video_outputsw_set(int status) 4857 { 4858 int autosw; 4859 int res = 0; 4860 4861 switch (video_supported) { 4862 case TPACPI_VIDEO_570: 4863 res = acpi_evalf(NULL, NULL, 4864 "\\_SB.PHS2", "vdd", 4865 TP_ACPI_VIDEO_570_PHS2CMD, 4866 status | TP_ACPI_VIDEO_570_PHS2SET); 4867 break; 4868 case TPACPI_VIDEO_770: 4869 autosw = video_autosw_get(); 4870 if (autosw < 0) 4871 return autosw; 4872 4873 res = video_autosw_set(1); 4874 if (res) 4875 return res; 4876 res = acpi_evalf(vid_handle, NULL, 4877 "ASWT", "vdd", status * 0x100, 0); 4878 if (!autosw && video_autosw_set(autosw)) { 4879 pr_err("video auto-switch left enabled due to error\n"); 4880 return -EIO; 4881 } 4882 break; 4883 case TPACPI_VIDEO_NEW: 4884 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4885 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4886 break; 4887 default: 4888 return -ENOSYS; 4889 } 4890 4891 return (res) ? 0 : -EIO; 4892 } 4893 4894 static int video_autosw_get(void) 4895 { 4896 int autosw = 0; 4897 4898 switch (video_supported) { 4899 case TPACPI_VIDEO_570: 4900 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4901 return -EIO; 4902 break; 4903 case TPACPI_VIDEO_770: 4904 case TPACPI_VIDEO_NEW: 4905 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4906 return -EIO; 4907 break; 4908 default: 4909 return -ENOSYS; 4910 } 4911 4912 return autosw & 1; 4913 } 4914 4915 static int video_autosw_set(int enable) 4916 { 4917 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 4918 return -EIO; 4919 return 0; 4920 } 4921 4922 static int video_outputsw_cycle(void) 4923 { 4924 int autosw = video_autosw_get(); 4925 int res; 4926 4927 if (autosw < 0) 4928 return autosw; 4929 4930 switch (video_supported) { 4931 case TPACPI_VIDEO_570: 4932 res = video_autosw_set(1); 4933 if (res) 4934 return res; 4935 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4936 break; 4937 case TPACPI_VIDEO_770: 4938 case TPACPI_VIDEO_NEW: 4939 res = video_autosw_set(1); 4940 if (res) 4941 return res; 4942 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4943 break; 4944 default: 4945 return -ENOSYS; 4946 } 4947 if (!autosw && video_autosw_set(autosw)) { 4948 pr_err("video auto-switch left enabled due to error\n"); 4949 return -EIO; 4950 } 4951 4952 return (res) ? 0 : -EIO; 4953 } 4954 4955 static int video_expand_toggle(void) 4956 { 4957 switch (video_supported) { 4958 case TPACPI_VIDEO_570: 4959 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 4960 0 : -EIO; 4961 case TPACPI_VIDEO_770: 4962 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 4963 0 : -EIO; 4964 case TPACPI_VIDEO_NEW: 4965 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 4966 0 : -EIO; 4967 default: 4968 return -ENOSYS; 4969 } 4970 /* not reached */ 4971 } 4972 4973 static int video_read(struct seq_file *m) 4974 { 4975 int status, autosw; 4976 4977 if (video_supported == TPACPI_VIDEO_NONE) { 4978 seq_printf(m, "status:\t\tnot supported\n"); 4979 return 0; 4980 } 4981 4982 /* Even reads can crash X.org, so... */ 4983 if (!capable(CAP_SYS_ADMIN)) 4984 return -EPERM; 4985 4986 status = video_outputsw_get(); 4987 if (status < 0) 4988 return status; 4989 4990 autosw = video_autosw_get(); 4991 if (autosw < 0) 4992 return autosw; 4993 4994 seq_printf(m, "status:\t\tsupported\n"); 4995 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4996 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4997 if (video_supported == TPACPI_VIDEO_NEW) 4998 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 4999 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 5000 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5001 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5002 if (video_supported == TPACPI_VIDEO_NEW) 5003 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5004 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5005 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5006 5007 return 0; 5008 } 5009 5010 static int video_write(char *buf) 5011 { 5012 char *cmd; 5013 int enable, disable, status; 5014 int res; 5015 5016 if (video_supported == TPACPI_VIDEO_NONE) 5017 return -ENODEV; 5018 5019 /* Even reads can crash X.org, let alone writes... */ 5020 if (!capable(CAP_SYS_ADMIN)) 5021 return -EPERM; 5022 5023 enable = 0; 5024 disable = 0; 5025 5026 while ((cmd = next_cmd(&buf))) { 5027 if (strlencmp(cmd, "lcd_enable") == 0) { 5028 enable |= TP_ACPI_VIDEO_S_LCD; 5029 } else if (strlencmp(cmd, "lcd_disable") == 0) { 5030 disable |= TP_ACPI_VIDEO_S_LCD; 5031 } else if (strlencmp(cmd, "crt_enable") == 0) { 5032 enable |= TP_ACPI_VIDEO_S_CRT; 5033 } else if (strlencmp(cmd, "crt_disable") == 0) { 5034 disable |= TP_ACPI_VIDEO_S_CRT; 5035 } else if (video_supported == TPACPI_VIDEO_NEW && 5036 strlencmp(cmd, "dvi_enable") == 0) { 5037 enable |= TP_ACPI_VIDEO_S_DVI; 5038 } else if (video_supported == TPACPI_VIDEO_NEW && 5039 strlencmp(cmd, "dvi_disable") == 0) { 5040 disable |= TP_ACPI_VIDEO_S_DVI; 5041 } else if (strlencmp(cmd, "auto_enable") == 0) { 5042 res = video_autosw_set(1); 5043 if (res) 5044 return res; 5045 } else if (strlencmp(cmd, "auto_disable") == 0) { 5046 res = video_autosw_set(0); 5047 if (res) 5048 return res; 5049 } else if (strlencmp(cmd, "video_switch") == 0) { 5050 res = video_outputsw_cycle(); 5051 if (res) 5052 return res; 5053 } else if (strlencmp(cmd, "expand_toggle") == 0) { 5054 res = video_expand_toggle(); 5055 if (res) 5056 return res; 5057 } else 5058 return -EINVAL; 5059 } 5060 5061 if (enable || disable) { 5062 status = video_outputsw_get(); 5063 if (status < 0) 5064 return status; 5065 res = video_outputsw_set((status & ~disable) | enable); 5066 if (res) 5067 return res; 5068 } 5069 5070 return 0; 5071 } 5072 5073 static struct ibm_struct video_driver_data = { 5074 .name = "video", 5075 .read = video_read, 5076 .write = video_write, 5077 .exit = video_exit, 5078 }; 5079 5080 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5081 5082 /************************************************************************* 5083 * Keyboard backlight subdriver 5084 */ 5085 5086 static enum led_brightness kbdlight_brightness; 5087 static DEFINE_MUTEX(kbdlight_mutex); 5088 5089 static int kbdlight_set_level(int level) 5090 { 5091 int ret = 0; 5092 5093 if (!hkey_handle) 5094 return -ENXIO; 5095 5096 mutex_lock(&kbdlight_mutex); 5097 5098 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5099 ret = -EIO; 5100 else 5101 kbdlight_brightness = level; 5102 5103 mutex_unlock(&kbdlight_mutex); 5104 5105 return ret; 5106 } 5107 5108 static int kbdlight_get_level(void) 5109 { 5110 int status = 0; 5111 5112 if (!hkey_handle) 5113 return -ENXIO; 5114 5115 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5116 return -EIO; 5117 5118 if (status < 0) 5119 return status; 5120 5121 return status & 0x3; 5122 } 5123 5124 static bool kbdlight_is_supported(void) 5125 { 5126 int status = 0; 5127 5128 if (!hkey_handle) 5129 return false; 5130 5131 if (!acpi_has_method(hkey_handle, "MLCG")) { 5132 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5133 return false; 5134 } 5135 5136 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5137 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5138 return false; 5139 } 5140 5141 if (status < 0) { 5142 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5143 return false; 5144 } 5145 5146 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5147 /* 5148 * Guessed test for keyboard backlight: 5149 * 5150 * Machines with backlight keyboard return: 5151 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5152 * b110100010010000000XX - ThinkPad x230 5153 * b010100000010000000XX - ThinkPad x240 5154 * b010100000010000000XX - ThinkPad W541 5155 * (XX is current backlight level) 5156 * 5157 * Machines without backlight keyboard return: 5158 * b10100001000000000000 - ThinkPad x230 5159 * b10110001000000000000 - ThinkPad E430 5160 * b00000000000000000000 - ThinkPad E450 5161 * 5162 * Candidate BITs for detection test (XOR): 5163 * b01000000001000000000 5164 * ^ 5165 */ 5166 return status & BIT(9); 5167 } 5168 5169 static int kbdlight_sysfs_set(struct led_classdev *led_cdev, 5170 enum led_brightness brightness) 5171 { 5172 return kbdlight_set_level(brightness); 5173 } 5174 5175 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5176 { 5177 int level; 5178 5179 level = kbdlight_get_level(); 5180 if (level < 0) 5181 return 0; 5182 5183 return level; 5184 } 5185 5186 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5187 .led_classdev = { 5188 .name = "tpacpi::kbd_backlight", 5189 .max_brightness = 2, 5190 .flags = LED_BRIGHT_HW_CHANGED, 5191 .brightness_set_blocking = &kbdlight_sysfs_set, 5192 .brightness_get = &kbdlight_sysfs_get, 5193 } 5194 }; 5195 5196 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5197 { 5198 int rc; 5199 5200 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5201 5202 TPACPI_ACPIHANDLE_INIT(hkey); 5203 5204 if (!kbdlight_is_supported()) { 5205 tp_features.kbdlight = 0; 5206 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5207 return 1; 5208 } 5209 5210 kbdlight_brightness = kbdlight_sysfs_get(NULL); 5211 tp_features.kbdlight = 1; 5212 5213 rc = led_classdev_register(&tpacpi_pdev->dev, 5214 &tpacpi_led_kbdlight.led_classdev); 5215 if (rc < 0) { 5216 tp_features.kbdlight = 0; 5217 return rc; 5218 } 5219 5220 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask | 5221 TP_ACPI_HKEY_KBD_LIGHT_MASK); 5222 return 0; 5223 } 5224 5225 static void kbdlight_exit(void) 5226 { 5227 if (tp_features.kbdlight) 5228 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5229 } 5230 5231 static int kbdlight_set_level_and_update(int level) 5232 { 5233 int ret; 5234 struct led_classdev *led_cdev; 5235 5236 ret = kbdlight_set_level(level); 5237 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5238 5239 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5240 led_cdev->brightness = level; 5241 5242 return ret; 5243 } 5244 5245 static int kbdlight_read(struct seq_file *m) 5246 { 5247 int level; 5248 5249 if (!tp_features.kbdlight) { 5250 seq_printf(m, "status:\t\tnot supported\n"); 5251 } else { 5252 level = kbdlight_get_level(); 5253 if (level < 0) 5254 seq_printf(m, "status:\t\terror %d\n", level); 5255 else 5256 seq_printf(m, "status:\t\t%d\n", level); 5257 seq_printf(m, "commands:\t0, 1, 2\n"); 5258 } 5259 5260 return 0; 5261 } 5262 5263 static int kbdlight_write(char *buf) 5264 { 5265 char *cmd; 5266 int level = -1; 5267 5268 if (!tp_features.kbdlight) 5269 return -ENODEV; 5270 5271 while ((cmd = next_cmd(&buf))) { 5272 if (strlencmp(cmd, "0") == 0) 5273 level = 0; 5274 else if (strlencmp(cmd, "1") == 0) 5275 level = 1; 5276 else if (strlencmp(cmd, "2") == 0) 5277 level = 2; 5278 else 5279 return -EINVAL; 5280 } 5281 5282 if (level == -1) 5283 return -EINVAL; 5284 5285 return kbdlight_set_level_and_update(level); 5286 } 5287 5288 static void kbdlight_suspend(void) 5289 { 5290 struct led_classdev *led_cdev; 5291 5292 if (!tp_features.kbdlight) 5293 return; 5294 5295 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5296 led_update_brightness(led_cdev); 5297 led_classdev_suspend(led_cdev); 5298 } 5299 5300 static void kbdlight_resume(void) 5301 { 5302 if (!tp_features.kbdlight) 5303 return; 5304 5305 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5306 } 5307 5308 static struct ibm_struct kbdlight_driver_data = { 5309 .name = "kbdlight", 5310 .read = kbdlight_read, 5311 .write = kbdlight_write, 5312 .suspend = kbdlight_suspend, 5313 .resume = kbdlight_resume, 5314 .exit = kbdlight_exit, 5315 }; 5316 5317 /************************************************************************* 5318 * Light (thinklight) subdriver 5319 */ 5320 5321 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5322 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5323 5324 static int light_get_status(void) 5325 { 5326 int status = 0; 5327 5328 if (tp_features.light_status) { 5329 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5330 return -EIO; 5331 return (!!status); 5332 } 5333 5334 return -ENXIO; 5335 } 5336 5337 static int light_set_status(int status) 5338 { 5339 int rc; 5340 5341 if (tp_features.light) { 5342 if (cmos_handle) { 5343 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5344 (status) ? 5345 TP_CMOS_THINKLIGHT_ON : 5346 TP_CMOS_THINKLIGHT_OFF); 5347 } else { 5348 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5349 (status) ? 1 : 0); 5350 } 5351 return (rc) ? 0 : -EIO; 5352 } 5353 5354 return -ENXIO; 5355 } 5356 5357 static int light_sysfs_set(struct led_classdev *led_cdev, 5358 enum led_brightness brightness) 5359 { 5360 return light_set_status((brightness != LED_OFF) ? 5361 TPACPI_LED_ON : TPACPI_LED_OFF); 5362 } 5363 5364 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5365 { 5366 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5367 } 5368 5369 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5370 .led_classdev = { 5371 .name = "tpacpi::thinklight", 5372 .brightness_set_blocking = &light_sysfs_set, 5373 .brightness_get = &light_sysfs_get, 5374 } 5375 }; 5376 5377 static int __init light_init(struct ibm_init_struct *iibm) 5378 { 5379 int rc; 5380 5381 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5382 5383 if (tpacpi_is_ibm()) { 5384 TPACPI_ACPIHANDLE_INIT(ledb); 5385 TPACPI_ACPIHANDLE_INIT(lght); 5386 } 5387 TPACPI_ACPIHANDLE_INIT(cmos); 5388 5389 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5390 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5391 5392 if (tp_features.light) 5393 /* light status not supported on 5394 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5395 tp_features.light_status = 5396 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5397 5398 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5399 str_supported(tp_features.light), 5400 str_supported(tp_features.light_status)); 5401 5402 if (!tp_features.light) 5403 return 1; 5404 5405 rc = led_classdev_register(&tpacpi_pdev->dev, 5406 &tpacpi_led_thinklight.led_classdev); 5407 5408 if (rc < 0) { 5409 tp_features.light = 0; 5410 tp_features.light_status = 0; 5411 } else { 5412 rc = 0; 5413 } 5414 5415 return rc; 5416 } 5417 5418 static void light_exit(void) 5419 { 5420 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5421 } 5422 5423 static int light_read(struct seq_file *m) 5424 { 5425 int status; 5426 5427 if (!tp_features.light) { 5428 seq_printf(m, "status:\t\tnot supported\n"); 5429 } else if (!tp_features.light_status) { 5430 seq_printf(m, "status:\t\tunknown\n"); 5431 seq_printf(m, "commands:\ton, off\n"); 5432 } else { 5433 status = light_get_status(); 5434 if (status < 0) 5435 return status; 5436 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5437 seq_printf(m, "commands:\ton, off\n"); 5438 } 5439 5440 return 0; 5441 } 5442 5443 static int light_write(char *buf) 5444 { 5445 char *cmd; 5446 int newstatus = 0; 5447 5448 if (!tp_features.light) 5449 return -ENODEV; 5450 5451 while ((cmd = next_cmd(&buf))) { 5452 if (strlencmp(cmd, "on") == 0) { 5453 newstatus = 1; 5454 } else if (strlencmp(cmd, "off") == 0) { 5455 newstatus = 0; 5456 } else 5457 return -EINVAL; 5458 } 5459 5460 return light_set_status(newstatus); 5461 } 5462 5463 static struct ibm_struct light_driver_data = { 5464 .name = "light", 5465 .read = light_read, 5466 .write = light_write, 5467 .exit = light_exit, 5468 }; 5469 5470 /************************************************************************* 5471 * CMOS subdriver 5472 */ 5473 5474 /* sysfs cmos_command -------------------------------------------------- */ 5475 static ssize_t cmos_command_store(struct device *dev, 5476 struct device_attribute *attr, 5477 const char *buf, size_t count) 5478 { 5479 unsigned long cmos_cmd; 5480 int res; 5481 5482 if (parse_strtoul(buf, 21, &cmos_cmd)) 5483 return -EINVAL; 5484 5485 res = issue_thinkpad_cmos_command(cmos_cmd); 5486 return (res) ? res : count; 5487 } 5488 5489 static DEVICE_ATTR_WO(cmos_command); 5490 5491 /* --------------------------------------------------------------------- */ 5492 5493 static int __init cmos_init(struct ibm_init_struct *iibm) 5494 { 5495 int res; 5496 5497 vdbg_printk(TPACPI_DBG_INIT, 5498 "initializing cmos commands subdriver\n"); 5499 5500 TPACPI_ACPIHANDLE_INIT(cmos); 5501 5502 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5503 str_supported(cmos_handle != NULL)); 5504 5505 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5506 if (res) 5507 return res; 5508 5509 return (cmos_handle) ? 0 : 1; 5510 } 5511 5512 static void cmos_exit(void) 5513 { 5514 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5515 } 5516 5517 static int cmos_read(struct seq_file *m) 5518 { 5519 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5520 R30, R31, T20-22, X20-21 */ 5521 if (!cmos_handle) 5522 seq_printf(m, "status:\t\tnot supported\n"); 5523 else { 5524 seq_printf(m, "status:\t\tsupported\n"); 5525 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5526 } 5527 5528 return 0; 5529 } 5530 5531 static int cmos_write(char *buf) 5532 { 5533 char *cmd; 5534 int cmos_cmd, res; 5535 5536 while ((cmd = next_cmd(&buf))) { 5537 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5538 cmos_cmd >= 0 && cmos_cmd <= 21) { 5539 /* cmos_cmd set */ 5540 } else 5541 return -EINVAL; 5542 5543 res = issue_thinkpad_cmos_command(cmos_cmd); 5544 if (res) 5545 return res; 5546 } 5547 5548 return 0; 5549 } 5550 5551 static struct ibm_struct cmos_driver_data = { 5552 .name = "cmos", 5553 .read = cmos_read, 5554 .write = cmos_write, 5555 .exit = cmos_exit, 5556 }; 5557 5558 /************************************************************************* 5559 * LED subdriver 5560 */ 5561 5562 enum led_access_mode { 5563 TPACPI_LED_NONE = 0, 5564 TPACPI_LED_570, /* 570 */ 5565 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5566 TPACPI_LED_NEW, /* all others */ 5567 }; 5568 5569 enum { /* For TPACPI_LED_OLD */ 5570 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5571 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5572 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5573 }; 5574 5575 static enum led_access_mode led_supported; 5576 5577 static acpi_handle led_handle; 5578 5579 #define TPACPI_LED_NUMLEDS 16 5580 static struct tpacpi_led_classdev *tpacpi_leds; 5581 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5582 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5583 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5584 "tpacpi::power", 5585 "tpacpi:orange:batt", 5586 "tpacpi:green:batt", 5587 "tpacpi::dock_active", 5588 "tpacpi::bay_active", 5589 "tpacpi::dock_batt", 5590 "tpacpi::unknown_led", 5591 "tpacpi::standby", 5592 "tpacpi::dock_status1", 5593 "tpacpi::dock_status2", 5594 "tpacpi::unknown_led2", 5595 "tpacpi::unknown_led3", 5596 "tpacpi::thinkvantage", 5597 }; 5598 #define TPACPI_SAFE_LEDS 0x1081U 5599 5600 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5601 { 5602 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5603 return false; 5604 #else 5605 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5606 #endif 5607 } 5608 5609 static int led_get_status(const unsigned int led) 5610 { 5611 int status; 5612 enum led_status_t led_s; 5613 5614 switch (led_supported) { 5615 case TPACPI_LED_570: 5616 if (!acpi_evalf(ec_handle, 5617 &status, "GLED", "dd", 1 << led)) 5618 return -EIO; 5619 led_s = (status == 0) ? 5620 TPACPI_LED_OFF : 5621 ((status == 1) ? 5622 TPACPI_LED_ON : 5623 TPACPI_LED_BLINK); 5624 tpacpi_led_state_cache[led] = led_s; 5625 return led_s; 5626 default: 5627 return -ENXIO; 5628 } 5629 5630 /* not reached */ 5631 } 5632 5633 static int led_set_status(const unsigned int led, 5634 const enum led_status_t ledstatus) 5635 { 5636 /* off, on, blink. Index is led_status_t */ 5637 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5638 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5639 5640 int rc = 0; 5641 5642 switch (led_supported) { 5643 case TPACPI_LED_570: 5644 /* 570 */ 5645 if (unlikely(led > 7)) 5646 return -EINVAL; 5647 if (unlikely(tpacpi_is_led_restricted(led))) 5648 return -EPERM; 5649 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5650 (1 << led), led_sled_arg1[ledstatus])) 5651 rc = -EIO; 5652 break; 5653 case TPACPI_LED_OLD: 5654 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5655 if (unlikely(led > 7)) 5656 return -EINVAL; 5657 if (unlikely(tpacpi_is_led_restricted(led))) 5658 return -EPERM; 5659 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5660 if (rc >= 0) 5661 rc = ec_write(TPACPI_LED_EC_HLBL, 5662 (ledstatus == TPACPI_LED_BLINK) << led); 5663 if (rc >= 0) 5664 rc = ec_write(TPACPI_LED_EC_HLCL, 5665 (ledstatus != TPACPI_LED_OFF) << led); 5666 break; 5667 case TPACPI_LED_NEW: 5668 /* all others */ 5669 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5670 return -EINVAL; 5671 if (unlikely(tpacpi_is_led_restricted(led))) 5672 return -EPERM; 5673 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5674 led, led_led_arg1[ledstatus])) 5675 rc = -EIO; 5676 break; 5677 default: 5678 rc = -ENXIO; 5679 } 5680 5681 if (!rc) 5682 tpacpi_led_state_cache[led] = ledstatus; 5683 5684 return rc; 5685 } 5686 5687 static int led_sysfs_set(struct led_classdev *led_cdev, 5688 enum led_brightness brightness) 5689 { 5690 struct tpacpi_led_classdev *data = container_of(led_cdev, 5691 struct tpacpi_led_classdev, led_classdev); 5692 enum led_status_t new_state; 5693 5694 if (brightness == LED_OFF) 5695 new_state = TPACPI_LED_OFF; 5696 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5697 new_state = TPACPI_LED_ON; 5698 else 5699 new_state = TPACPI_LED_BLINK; 5700 5701 return led_set_status(data->led, new_state); 5702 } 5703 5704 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5705 unsigned long *delay_on, unsigned long *delay_off) 5706 { 5707 struct tpacpi_led_classdev *data = container_of(led_cdev, 5708 struct tpacpi_led_classdev, led_classdev); 5709 5710 /* Can we choose the flash rate? */ 5711 if (*delay_on == 0 && *delay_off == 0) { 5712 /* yes. set them to the hardware blink rate (1 Hz) */ 5713 *delay_on = 500; /* ms */ 5714 *delay_off = 500; /* ms */ 5715 } else if ((*delay_on != 500) || (*delay_off != 500)) 5716 return -EINVAL; 5717 5718 return led_set_status(data->led, TPACPI_LED_BLINK); 5719 } 5720 5721 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5722 { 5723 int rc; 5724 5725 struct tpacpi_led_classdev *data = container_of(led_cdev, 5726 struct tpacpi_led_classdev, led_classdev); 5727 5728 rc = led_get_status(data->led); 5729 5730 if (rc == TPACPI_LED_OFF || rc < 0) 5731 rc = LED_OFF; /* no error handling in led class :( */ 5732 else 5733 rc = LED_FULL; 5734 5735 return rc; 5736 } 5737 5738 static void led_exit(void) 5739 { 5740 unsigned int i; 5741 5742 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5743 if (tpacpi_leds[i].led_classdev.name) 5744 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5745 } 5746 5747 kfree(tpacpi_leds); 5748 } 5749 5750 static int __init tpacpi_init_led(unsigned int led) 5751 { 5752 int rc; 5753 5754 tpacpi_leds[led].led = led; 5755 5756 /* LEDs with no name don't get registered */ 5757 if (!tpacpi_led_names[led]) 5758 return 0; 5759 5760 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set; 5761 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5762 if (led_supported == TPACPI_LED_570) 5763 tpacpi_leds[led].led_classdev.brightness_get = 5764 &led_sysfs_get; 5765 5766 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5767 5768 rc = led_classdev_register(&tpacpi_pdev->dev, 5769 &tpacpi_leds[led].led_classdev); 5770 if (rc < 0) 5771 tpacpi_leds[led].led_classdev.name = NULL; 5772 5773 return rc; 5774 } 5775 5776 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5777 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5778 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5779 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5780 5781 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5782 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5783 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5784 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5785 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5786 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5787 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5788 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5789 5790 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5791 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5792 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5793 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5794 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5795 5796 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5797 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5798 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5799 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5800 5801 /* (1) - may have excess leds enabled on MSB */ 5802 5803 /* Defaults (order matters, keep last, don't reorder!) */ 5804 { /* Lenovo */ 5805 .vendor = PCI_VENDOR_ID_LENOVO, 5806 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5807 .quirks = 0x1fffU, 5808 }, 5809 { /* IBM ThinkPads with no EC version string */ 5810 .vendor = PCI_VENDOR_ID_IBM, 5811 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5812 .quirks = 0x00ffU, 5813 }, 5814 { /* IBM ThinkPads with EC version string */ 5815 .vendor = PCI_VENDOR_ID_IBM, 5816 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5817 .quirks = 0x00bfU, 5818 }, 5819 }; 5820 5821 #undef TPACPI_LEDQ_IBM 5822 #undef TPACPI_LEDQ_LNV 5823 5824 static enum led_access_mode __init led_init_detect_mode(void) 5825 { 5826 acpi_status status; 5827 5828 if (tpacpi_is_ibm()) { 5829 /* 570 */ 5830 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5831 if (ACPI_SUCCESS(status)) 5832 return TPACPI_LED_570; 5833 5834 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5835 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5836 if (ACPI_SUCCESS(status)) 5837 return TPACPI_LED_OLD; 5838 } 5839 5840 /* most others */ 5841 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5842 if (ACPI_SUCCESS(status)) 5843 return TPACPI_LED_NEW; 5844 5845 /* R30, R31, and unknown firmwares */ 5846 led_handle = NULL; 5847 return TPACPI_LED_NONE; 5848 } 5849 5850 static int __init led_init(struct ibm_init_struct *iibm) 5851 { 5852 unsigned int i; 5853 int rc; 5854 unsigned long useful_leds; 5855 5856 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5857 5858 led_supported = led_init_detect_mode(); 5859 5860 if (led_supported != TPACPI_LED_NONE) { 5861 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5862 ARRAY_SIZE(led_useful_qtable)); 5863 5864 if (!useful_leds) { 5865 led_handle = NULL; 5866 led_supported = TPACPI_LED_NONE; 5867 } 5868 } 5869 5870 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5871 str_supported(led_supported), led_supported); 5872 5873 if (led_supported == TPACPI_LED_NONE) 5874 return 1; 5875 5876 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5877 GFP_KERNEL); 5878 if (!tpacpi_leds) { 5879 pr_err("Out of memory for LED data\n"); 5880 return -ENOMEM; 5881 } 5882 5883 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5884 tpacpi_leds[i].led = -1; 5885 5886 if (!tpacpi_is_led_restricted(i) && 5887 test_bit(i, &useful_leds)) { 5888 rc = tpacpi_init_led(i); 5889 if (rc < 0) { 5890 led_exit(); 5891 return rc; 5892 } 5893 } 5894 } 5895 5896 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5897 pr_notice("warning: userspace override of important " 5898 "firmware LEDs is enabled\n"); 5899 #endif 5900 return 0; 5901 } 5902 5903 #define str_led_status(s) \ 5904 ((s) == TPACPI_LED_OFF ? "off" : \ 5905 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5906 5907 static int led_read(struct seq_file *m) 5908 { 5909 if (!led_supported) { 5910 seq_printf(m, "status:\t\tnot supported\n"); 5911 return 0; 5912 } 5913 seq_printf(m, "status:\t\tsupported\n"); 5914 5915 if (led_supported == TPACPI_LED_570) { 5916 /* 570 */ 5917 int i, status; 5918 for (i = 0; i < 8; i++) { 5919 status = led_get_status(i); 5920 if (status < 0) 5921 return -EIO; 5922 seq_printf(m, "%d:\t\t%s\n", 5923 i, str_led_status(status)); 5924 } 5925 } 5926 5927 seq_printf(m, "commands:\t" 5928 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5929 5930 return 0; 5931 } 5932 5933 static int led_write(char *buf) 5934 { 5935 char *cmd; 5936 int led, rc; 5937 enum led_status_t s; 5938 5939 if (!led_supported) 5940 return -ENODEV; 5941 5942 while ((cmd = next_cmd(&buf))) { 5943 if (sscanf(cmd, "%d", &led) != 1) 5944 return -EINVAL; 5945 5946 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 5947 tpacpi_leds[led].led < 0) 5948 return -ENODEV; 5949 5950 if (strstr(cmd, "off")) { 5951 s = TPACPI_LED_OFF; 5952 } else if (strstr(cmd, "on")) { 5953 s = TPACPI_LED_ON; 5954 } else if (strstr(cmd, "blink")) { 5955 s = TPACPI_LED_BLINK; 5956 } else { 5957 return -EINVAL; 5958 } 5959 5960 rc = led_set_status(led, s); 5961 if (rc < 0) 5962 return rc; 5963 } 5964 5965 return 0; 5966 } 5967 5968 static struct ibm_struct led_driver_data = { 5969 .name = "led", 5970 .read = led_read, 5971 .write = led_write, 5972 .exit = led_exit, 5973 }; 5974 5975 /************************************************************************* 5976 * Beep subdriver 5977 */ 5978 5979 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5980 5981 #define TPACPI_BEEP_Q1 0x0001 5982 5983 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5984 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5985 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5986 }; 5987 5988 static int __init beep_init(struct ibm_init_struct *iibm) 5989 { 5990 unsigned long quirks; 5991 5992 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5993 5994 TPACPI_ACPIHANDLE_INIT(beep); 5995 5996 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5997 str_supported(beep_handle != NULL)); 5998 5999 quirks = tpacpi_check_quirks(beep_quirk_table, 6000 ARRAY_SIZE(beep_quirk_table)); 6001 6002 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6003 6004 return (beep_handle) ? 0 : 1; 6005 } 6006 6007 static int beep_read(struct seq_file *m) 6008 { 6009 if (!beep_handle) 6010 seq_printf(m, "status:\t\tnot supported\n"); 6011 else { 6012 seq_printf(m, "status:\t\tsupported\n"); 6013 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6014 } 6015 6016 return 0; 6017 } 6018 6019 static int beep_write(char *buf) 6020 { 6021 char *cmd; 6022 int beep_cmd; 6023 6024 if (!beep_handle) 6025 return -ENODEV; 6026 6027 while ((cmd = next_cmd(&buf))) { 6028 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6029 beep_cmd >= 0 && beep_cmd <= 17) { 6030 /* beep_cmd set */ 6031 } else 6032 return -EINVAL; 6033 if (tp_features.beep_needs_two_args) { 6034 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6035 beep_cmd, 0)) 6036 return -EIO; 6037 } else { 6038 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6039 beep_cmd)) 6040 return -EIO; 6041 } 6042 } 6043 6044 return 0; 6045 } 6046 6047 static struct ibm_struct beep_driver_data = { 6048 .name = "beep", 6049 .read = beep_read, 6050 .write = beep_write, 6051 }; 6052 6053 /************************************************************************* 6054 * Thermal subdriver 6055 */ 6056 6057 enum thermal_access_mode { 6058 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6059 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6060 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6061 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6062 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6063 }; 6064 6065 enum { /* TPACPI_THERMAL_TPEC_* */ 6066 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6067 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6068 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6069 6070 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6071 }; 6072 6073 6074 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6075 struct ibm_thermal_sensors_struct { 6076 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6077 }; 6078 6079 static enum thermal_access_mode thermal_read_mode; 6080 6081 /* idx is zero-based */ 6082 static int thermal_get_sensor(int idx, s32 *value) 6083 { 6084 int t; 6085 s8 tmp; 6086 char tmpi[5]; 6087 6088 t = TP_EC_THERMAL_TMP0; 6089 6090 switch (thermal_read_mode) { 6091 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6092 case TPACPI_THERMAL_TPEC_16: 6093 if (idx >= 8 && idx <= 15) { 6094 t = TP_EC_THERMAL_TMP8; 6095 idx -= 8; 6096 } 6097 /* fallthrough */ 6098 #endif 6099 case TPACPI_THERMAL_TPEC_8: 6100 if (idx <= 7) { 6101 if (!acpi_ec_read(t + idx, &tmp)) 6102 return -EIO; 6103 *value = tmp * 1000; 6104 return 0; 6105 } 6106 break; 6107 6108 case TPACPI_THERMAL_ACPI_UPDT: 6109 if (idx <= 7) { 6110 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6111 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6112 return -EIO; 6113 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6114 return -EIO; 6115 *value = (t - 2732) * 100; 6116 return 0; 6117 } 6118 break; 6119 6120 case TPACPI_THERMAL_ACPI_TMP07: 6121 if (idx <= 7) { 6122 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6123 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6124 return -EIO; 6125 if (t > 127 || t < -127) 6126 t = TP_EC_THERMAL_TMP_NA; 6127 *value = t * 1000; 6128 return 0; 6129 } 6130 break; 6131 6132 case TPACPI_THERMAL_NONE: 6133 default: 6134 return -ENOSYS; 6135 } 6136 6137 return -EINVAL; 6138 } 6139 6140 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6141 { 6142 int res, i; 6143 int n; 6144 6145 n = 8; 6146 i = 0; 6147 6148 if (!s) 6149 return -EINVAL; 6150 6151 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6152 n = 16; 6153 6154 for (i = 0 ; i < n; i++) { 6155 res = thermal_get_sensor(i, &s->temp[i]); 6156 if (res) 6157 return res; 6158 } 6159 6160 return n; 6161 } 6162 6163 static void thermal_dump_all_sensors(void) 6164 { 6165 int n, i; 6166 struct ibm_thermal_sensors_struct t; 6167 6168 n = thermal_get_sensors(&t); 6169 if (n <= 0) 6170 return; 6171 6172 pr_notice("temperatures (Celsius):"); 6173 6174 for (i = 0; i < n; i++) { 6175 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6176 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6177 else 6178 pr_cont(" N/A"); 6179 } 6180 6181 pr_cont("\n"); 6182 } 6183 6184 /* sysfs temp##_input -------------------------------------------------- */ 6185 6186 static ssize_t thermal_temp_input_show(struct device *dev, 6187 struct device_attribute *attr, 6188 char *buf) 6189 { 6190 struct sensor_device_attribute *sensor_attr = 6191 to_sensor_dev_attr(attr); 6192 int idx = sensor_attr->index; 6193 s32 value; 6194 int res; 6195 6196 res = thermal_get_sensor(idx, &value); 6197 if (res) 6198 return res; 6199 if (value == TPACPI_THERMAL_SENSOR_NA) 6200 return -ENXIO; 6201 6202 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6203 } 6204 6205 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6206 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6207 thermal_temp_input_show, NULL, _idxB) 6208 6209 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6210 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6211 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6212 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6213 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6214 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6215 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6216 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6217 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6218 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6219 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6220 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6221 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6222 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6223 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6224 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6225 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6226 }; 6227 6228 #define THERMAL_ATTRS(X) \ 6229 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6230 6231 static struct attribute *thermal_temp_input_attr[] = { 6232 THERMAL_ATTRS(8), 6233 THERMAL_ATTRS(9), 6234 THERMAL_ATTRS(10), 6235 THERMAL_ATTRS(11), 6236 THERMAL_ATTRS(12), 6237 THERMAL_ATTRS(13), 6238 THERMAL_ATTRS(14), 6239 THERMAL_ATTRS(15), 6240 THERMAL_ATTRS(0), 6241 THERMAL_ATTRS(1), 6242 THERMAL_ATTRS(2), 6243 THERMAL_ATTRS(3), 6244 THERMAL_ATTRS(4), 6245 THERMAL_ATTRS(5), 6246 THERMAL_ATTRS(6), 6247 THERMAL_ATTRS(7), 6248 NULL 6249 }; 6250 6251 static const struct attribute_group thermal_temp_input16_group = { 6252 .attrs = thermal_temp_input_attr 6253 }; 6254 6255 static const struct attribute_group thermal_temp_input8_group = { 6256 .attrs = &thermal_temp_input_attr[8] 6257 }; 6258 6259 #undef THERMAL_SENSOR_ATTR_TEMP 6260 #undef THERMAL_ATTRS 6261 6262 /* --------------------------------------------------------------------- */ 6263 6264 static int __init thermal_init(struct ibm_init_struct *iibm) 6265 { 6266 u8 t, ta1, ta2; 6267 int i; 6268 int acpi_tmp7; 6269 int res; 6270 6271 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6272 6273 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6274 6275 if (thinkpad_id.ec_model) { 6276 /* 6277 * Direct EC access mode: sensors at registers 6278 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6279 * non-implemented, thermal sensors return 0x80 when 6280 * not available 6281 */ 6282 6283 ta1 = ta2 = 0; 6284 for (i = 0; i < 8; i++) { 6285 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6286 ta1 |= t; 6287 } else { 6288 ta1 = 0; 6289 break; 6290 } 6291 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6292 ta2 |= t; 6293 } else { 6294 ta1 = 0; 6295 break; 6296 } 6297 } 6298 if (ta1 == 0) { 6299 /* This is sheer paranoia, but we handle it anyway */ 6300 if (acpi_tmp7) { 6301 pr_err("ThinkPad ACPI EC access misbehaving, " 6302 "falling back to ACPI TMPx access " 6303 "mode\n"); 6304 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6305 } else { 6306 pr_err("ThinkPad ACPI EC access misbehaving, " 6307 "disabling thermal sensors access\n"); 6308 thermal_read_mode = TPACPI_THERMAL_NONE; 6309 } 6310 } else { 6311 thermal_read_mode = 6312 (ta2 != 0) ? 6313 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6314 } 6315 } else if (acpi_tmp7) { 6316 if (tpacpi_is_ibm() && 6317 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6318 /* 600e/x, 770e, 770x */ 6319 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6320 } else { 6321 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6322 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6323 } 6324 } else { 6325 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6326 thermal_read_mode = TPACPI_THERMAL_NONE; 6327 } 6328 6329 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6330 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6331 thermal_read_mode); 6332 6333 switch (thermal_read_mode) { 6334 case TPACPI_THERMAL_TPEC_16: 6335 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 6336 &thermal_temp_input16_group); 6337 if (res) 6338 return res; 6339 break; 6340 case TPACPI_THERMAL_TPEC_8: 6341 case TPACPI_THERMAL_ACPI_TMP07: 6342 case TPACPI_THERMAL_ACPI_UPDT: 6343 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 6344 &thermal_temp_input8_group); 6345 if (res) 6346 return res; 6347 break; 6348 case TPACPI_THERMAL_NONE: 6349 default: 6350 return 1; 6351 } 6352 6353 return 0; 6354 } 6355 6356 static void thermal_exit(void) 6357 { 6358 switch (thermal_read_mode) { 6359 case TPACPI_THERMAL_TPEC_16: 6360 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 6361 &thermal_temp_input16_group); 6362 break; 6363 case TPACPI_THERMAL_TPEC_8: 6364 case TPACPI_THERMAL_ACPI_TMP07: 6365 case TPACPI_THERMAL_ACPI_UPDT: 6366 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 6367 &thermal_temp_input8_group); 6368 break; 6369 case TPACPI_THERMAL_NONE: 6370 default: 6371 break; 6372 } 6373 } 6374 6375 static int thermal_read(struct seq_file *m) 6376 { 6377 int n, i; 6378 struct ibm_thermal_sensors_struct t; 6379 6380 n = thermal_get_sensors(&t); 6381 if (unlikely(n < 0)) 6382 return n; 6383 6384 seq_printf(m, "temperatures:\t"); 6385 6386 if (n > 0) { 6387 for (i = 0; i < (n - 1); i++) 6388 seq_printf(m, "%d ", t.temp[i] / 1000); 6389 seq_printf(m, "%d\n", t.temp[i] / 1000); 6390 } else 6391 seq_printf(m, "not supported\n"); 6392 6393 return 0; 6394 } 6395 6396 static struct ibm_struct thermal_driver_data = { 6397 .name = "thermal", 6398 .read = thermal_read, 6399 .exit = thermal_exit, 6400 }; 6401 6402 /************************************************************************* 6403 * Backlight/brightness subdriver 6404 */ 6405 6406 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6407 6408 /* 6409 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6410 * CMOS NVRAM byte 0x5E, bits 0-3. 6411 * 6412 * EC HBRV (0x31) has the following layout 6413 * Bit 7: unknown function 6414 * Bit 6: unknown function 6415 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6416 * Bit 4: must be set to zero to avoid problems 6417 * Bit 3-0: backlight brightness level 6418 * 6419 * brightness_get_raw returns status data in the HBRV layout 6420 * 6421 * WARNING: The X61 has been verified to use HBRV for something else, so 6422 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6423 * testing on the very early *60 Lenovo models... 6424 */ 6425 6426 enum { 6427 TP_EC_BACKLIGHT = 0x31, 6428 6429 /* TP_EC_BACKLIGHT bitmasks */ 6430 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6431 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6432 TP_EC_BACKLIGHT_MAPSW = 0x20, 6433 }; 6434 6435 enum tpacpi_brightness_access_mode { 6436 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6437 TPACPI_BRGHT_MODE_EC, /* EC control */ 6438 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6439 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6440 TPACPI_BRGHT_MODE_MAX 6441 }; 6442 6443 static struct backlight_device *ibm_backlight_device; 6444 6445 static enum tpacpi_brightness_access_mode brightness_mode = 6446 TPACPI_BRGHT_MODE_MAX; 6447 6448 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6449 6450 static struct mutex brightness_mutex; 6451 6452 /* NVRAM brightness access, 6453 * call with brightness_mutex held! */ 6454 static unsigned int tpacpi_brightness_nvram_get(void) 6455 { 6456 u8 lnvram; 6457 6458 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6459 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6460 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6461 lnvram &= bright_maxlvl; 6462 6463 return lnvram; 6464 } 6465 6466 static void tpacpi_brightness_checkpoint_nvram(void) 6467 { 6468 u8 lec = 0; 6469 u8 b_nvram; 6470 6471 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6472 return; 6473 6474 vdbg_printk(TPACPI_DBG_BRGHT, 6475 "trying to checkpoint backlight level to NVRAM...\n"); 6476 6477 if (mutex_lock_killable(&brightness_mutex) < 0) 6478 return; 6479 6480 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6481 goto unlock; 6482 lec &= TP_EC_BACKLIGHT_LVLMSK; 6483 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6484 6485 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6486 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6487 /* NVRAM needs update */ 6488 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6489 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6490 b_nvram |= lec; 6491 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6492 dbg_printk(TPACPI_DBG_BRGHT, 6493 "updated NVRAM backlight level to %u (0x%02x)\n", 6494 (unsigned int) lec, (unsigned int) b_nvram); 6495 } else 6496 vdbg_printk(TPACPI_DBG_BRGHT, 6497 "NVRAM backlight level already is %u (0x%02x)\n", 6498 (unsigned int) lec, (unsigned int) b_nvram); 6499 6500 unlock: 6501 mutex_unlock(&brightness_mutex); 6502 } 6503 6504 6505 /* call with brightness_mutex held! */ 6506 static int tpacpi_brightness_get_raw(int *status) 6507 { 6508 u8 lec = 0; 6509 6510 switch (brightness_mode) { 6511 case TPACPI_BRGHT_MODE_UCMS_STEP: 6512 *status = tpacpi_brightness_nvram_get(); 6513 return 0; 6514 case TPACPI_BRGHT_MODE_EC: 6515 case TPACPI_BRGHT_MODE_ECNVRAM: 6516 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6517 return -EIO; 6518 *status = lec; 6519 return 0; 6520 default: 6521 return -ENXIO; 6522 } 6523 } 6524 6525 /* call with brightness_mutex held! */ 6526 /* do NOT call with illegal backlight level value */ 6527 static int tpacpi_brightness_set_ec(unsigned int value) 6528 { 6529 u8 lec = 0; 6530 6531 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6532 return -EIO; 6533 6534 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6535 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6536 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6537 return -EIO; 6538 6539 return 0; 6540 } 6541 6542 /* call with brightness_mutex held! */ 6543 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6544 { 6545 int cmos_cmd, inc; 6546 unsigned int current_value, i; 6547 6548 current_value = tpacpi_brightness_nvram_get(); 6549 6550 if (value == current_value) 6551 return 0; 6552 6553 cmos_cmd = (value > current_value) ? 6554 TP_CMOS_BRIGHTNESS_UP : 6555 TP_CMOS_BRIGHTNESS_DOWN; 6556 inc = (value > current_value) ? 1 : -1; 6557 6558 for (i = current_value; i != value; i += inc) 6559 if (issue_thinkpad_cmos_command(cmos_cmd)) 6560 return -EIO; 6561 6562 return 0; 6563 } 6564 6565 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6566 static int brightness_set(unsigned int value) 6567 { 6568 int res; 6569 6570 if (value > bright_maxlvl) 6571 return -EINVAL; 6572 6573 vdbg_printk(TPACPI_DBG_BRGHT, 6574 "set backlight level to %d\n", value); 6575 6576 res = mutex_lock_killable(&brightness_mutex); 6577 if (res < 0) 6578 return res; 6579 6580 switch (brightness_mode) { 6581 case TPACPI_BRGHT_MODE_EC: 6582 case TPACPI_BRGHT_MODE_ECNVRAM: 6583 res = tpacpi_brightness_set_ec(value); 6584 break; 6585 case TPACPI_BRGHT_MODE_UCMS_STEP: 6586 res = tpacpi_brightness_set_ucmsstep(value); 6587 break; 6588 default: 6589 res = -ENXIO; 6590 } 6591 6592 mutex_unlock(&brightness_mutex); 6593 return res; 6594 } 6595 6596 /* sysfs backlight class ----------------------------------------------- */ 6597 6598 static int brightness_update_status(struct backlight_device *bd) 6599 { 6600 unsigned int level = 6601 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6602 bd->props.power == FB_BLANK_UNBLANK) ? 6603 bd->props.brightness : 0; 6604 6605 dbg_printk(TPACPI_DBG_BRGHT, 6606 "backlight: attempt to set level to %d\n", 6607 level); 6608 6609 /* it is the backlight class's job (caller) to handle 6610 * EINTR and other errors properly */ 6611 return brightness_set(level); 6612 } 6613 6614 static int brightness_get(struct backlight_device *bd) 6615 { 6616 int status, res; 6617 6618 res = mutex_lock_killable(&brightness_mutex); 6619 if (res < 0) 6620 return 0; 6621 6622 res = tpacpi_brightness_get_raw(&status); 6623 6624 mutex_unlock(&brightness_mutex); 6625 6626 if (res < 0) 6627 return 0; 6628 6629 return status & TP_EC_BACKLIGHT_LVLMSK; 6630 } 6631 6632 static void tpacpi_brightness_notify_change(void) 6633 { 6634 backlight_force_update(ibm_backlight_device, 6635 BACKLIGHT_UPDATE_HOTKEY); 6636 } 6637 6638 static const struct backlight_ops ibm_backlight_data = { 6639 .get_brightness = brightness_get, 6640 .update_status = brightness_update_status, 6641 }; 6642 6643 /* --------------------------------------------------------------------- */ 6644 6645 /* 6646 * Call _BCL method of video device. On some ThinkPads this will 6647 * switch the firmware to the ACPI brightness control mode. 6648 */ 6649 6650 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6651 { 6652 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6653 union acpi_object *obj; 6654 struct acpi_device *device, *child; 6655 int rc; 6656 6657 if (acpi_bus_get_device(handle, &device)) 6658 return 0; 6659 6660 rc = 0; 6661 list_for_each_entry(child, &device->children, node) { 6662 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6663 NULL, &buffer); 6664 if (ACPI_FAILURE(status)) 6665 continue; 6666 6667 obj = (union acpi_object *)buffer.pointer; 6668 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6669 pr_err("Unknown _BCL data, please report this to %s\n", 6670 TPACPI_MAIL); 6671 rc = 0; 6672 } else { 6673 rc = obj->package.count; 6674 } 6675 break; 6676 } 6677 6678 kfree(buffer.pointer); 6679 return rc; 6680 } 6681 6682 6683 /* 6684 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6685 */ 6686 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6687 { 6688 acpi_handle video_device; 6689 int bcl_levels = 0; 6690 6691 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6692 if (video_device) 6693 bcl_levels = tpacpi_query_bcl_levels(video_device); 6694 6695 tp_features.bright_acpimode = (bcl_levels > 0); 6696 6697 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6698 } 6699 6700 /* 6701 * These are only useful for models that have only one possibility 6702 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6703 * these quirks. 6704 */ 6705 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6706 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6707 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6708 6709 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6710 /* Models with ATI GPUs known to require ECNVRAM mode */ 6711 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6712 6713 /* Models with ATI GPUs that can use ECNVRAM */ 6714 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6715 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6716 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6717 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6718 6719 /* Models with Intel Extreme Graphics 2 */ 6720 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6721 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6722 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6723 6724 /* Models with Intel GMA900 */ 6725 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6726 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6727 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6728 }; 6729 6730 /* 6731 * Returns < 0 for error, otherwise sets tp_features.bright_* 6732 * and bright_maxlvl. 6733 */ 6734 static void __init tpacpi_detect_brightness_capabilities(void) 6735 { 6736 unsigned int b; 6737 6738 vdbg_printk(TPACPI_DBG_INIT, 6739 "detecting firmware brightness interface capabilities\n"); 6740 6741 /* we could run a quirks check here (same table used by 6742 * brightness_init) if needed */ 6743 6744 /* 6745 * We always attempt to detect acpi support, so as to switch 6746 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6747 * going to publish a backlight interface 6748 */ 6749 b = tpacpi_check_std_acpi_brightness_support(); 6750 switch (b) { 6751 case 16: 6752 bright_maxlvl = 15; 6753 break; 6754 case 8: 6755 case 0: 6756 bright_maxlvl = 7; 6757 break; 6758 default: 6759 tp_features.bright_unkfw = 1; 6760 bright_maxlvl = b - 1; 6761 } 6762 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6763 } 6764 6765 static int __init brightness_init(struct ibm_init_struct *iibm) 6766 { 6767 struct backlight_properties props; 6768 int b; 6769 unsigned long quirks; 6770 6771 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6772 6773 mutex_init(&brightness_mutex); 6774 6775 quirks = tpacpi_check_quirks(brightness_quirk_table, 6776 ARRAY_SIZE(brightness_quirk_table)); 6777 6778 /* tpacpi_detect_brightness_capabilities() must have run already */ 6779 6780 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6781 if (tp_features.bright_unkfw) 6782 return 1; 6783 6784 if (!brightness_enable) { 6785 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6786 "brightness support disabled by " 6787 "module parameter\n"); 6788 return 1; 6789 } 6790 6791 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6792 if (brightness_enable > 1) { 6793 pr_info("Standard ACPI backlight interface " 6794 "available, not loading native one\n"); 6795 return 1; 6796 } else if (brightness_enable == 1) { 6797 pr_warn("Cannot enable backlight brightness support, " 6798 "ACPI is already handling it. Refer to the " 6799 "acpi_backlight kernel parameter.\n"); 6800 return 1; 6801 } 6802 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6803 pr_notice("Standard ACPI backlight interface not " 6804 "available, thinkpad_acpi native " 6805 "brightness control enabled\n"); 6806 } 6807 6808 /* 6809 * Check for module parameter bogosity, note that we 6810 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6811 * able to detect "unspecified" 6812 */ 6813 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6814 return -EINVAL; 6815 6816 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6817 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6818 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6819 if (quirks & TPACPI_BRGHT_Q_EC) 6820 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6821 else 6822 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6823 6824 dbg_printk(TPACPI_DBG_BRGHT, 6825 "driver auto-selected brightness_mode=%d\n", 6826 brightness_mode); 6827 } 6828 6829 /* Safety */ 6830 if (!tpacpi_is_ibm() && 6831 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6832 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6833 return -EINVAL; 6834 6835 if (tpacpi_brightness_get_raw(&b) < 0) 6836 return 1; 6837 6838 memset(&props, 0, sizeof(struct backlight_properties)); 6839 props.type = BACKLIGHT_PLATFORM; 6840 props.max_brightness = bright_maxlvl; 6841 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6842 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6843 NULL, NULL, 6844 &ibm_backlight_data, 6845 &props); 6846 if (IS_ERR(ibm_backlight_device)) { 6847 int rc = PTR_ERR(ibm_backlight_device); 6848 ibm_backlight_device = NULL; 6849 pr_err("Could not register backlight device\n"); 6850 return rc; 6851 } 6852 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6853 "brightness is supported\n"); 6854 6855 if (quirks & TPACPI_BRGHT_Q_ASK) { 6856 pr_notice("brightness: will use unverified default: " 6857 "brightness_mode=%d\n", brightness_mode); 6858 pr_notice("brightness: please report to %s whether it works well " 6859 "or not on your ThinkPad\n", TPACPI_MAIL); 6860 } 6861 6862 /* Added by mistake in early 2007. Probably useless, but it could 6863 * be working around some unknown firmware problem where the value 6864 * read at startup doesn't match the real hardware state... so leave 6865 * it in place just in case */ 6866 backlight_update_status(ibm_backlight_device); 6867 6868 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6869 "brightness: registering brightness hotkeys " 6870 "as change notification\n"); 6871 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6872 | TP_ACPI_HKEY_BRGHTUP_MASK 6873 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6874 return 0; 6875 } 6876 6877 static void brightness_suspend(void) 6878 { 6879 tpacpi_brightness_checkpoint_nvram(); 6880 } 6881 6882 static void brightness_shutdown(void) 6883 { 6884 tpacpi_brightness_checkpoint_nvram(); 6885 } 6886 6887 static void brightness_exit(void) 6888 { 6889 if (ibm_backlight_device) { 6890 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6891 "calling backlight_device_unregister()\n"); 6892 backlight_device_unregister(ibm_backlight_device); 6893 } 6894 6895 tpacpi_brightness_checkpoint_nvram(); 6896 } 6897 6898 static int brightness_read(struct seq_file *m) 6899 { 6900 int level; 6901 6902 level = brightness_get(NULL); 6903 if (level < 0) { 6904 seq_printf(m, "level:\t\tunreadable\n"); 6905 } else { 6906 seq_printf(m, "level:\t\t%d\n", level); 6907 seq_printf(m, "commands:\tup, down\n"); 6908 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6909 bright_maxlvl); 6910 } 6911 6912 return 0; 6913 } 6914 6915 static int brightness_write(char *buf) 6916 { 6917 int level; 6918 int rc; 6919 char *cmd; 6920 6921 level = brightness_get(NULL); 6922 if (level < 0) 6923 return level; 6924 6925 while ((cmd = next_cmd(&buf))) { 6926 if (strlencmp(cmd, "up") == 0) { 6927 if (level < bright_maxlvl) 6928 level++; 6929 } else if (strlencmp(cmd, "down") == 0) { 6930 if (level > 0) 6931 level--; 6932 } else if (sscanf(cmd, "level %d", &level) == 1 && 6933 level >= 0 && level <= bright_maxlvl) { 6934 /* new level set */ 6935 } else 6936 return -EINVAL; 6937 } 6938 6939 tpacpi_disclose_usertask("procfs brightness", 6940 "set level to %d\n", level); 6941 6942 /* 6943 * Now we know what the final level should be, so we try to set it. 6944 * Doing it this way makes the syscall restartable in case of EINTR 6945 */ 6946 rc = brightness_set(level); 6947 if (!rc && ibm_backlight_device) 6948 backlight_force_update(ibm_backlight_device, 6949 BACKLIGHT_UPDATE_SYSFS); 6950 return (rc == -EINTR) ? -ERESTARTSYS : rc; 6951 } 6952 6953 static struct ibm_struct brightness_driver_data = { 6954 .name = "brightness", 6955 .read = brightness_read, 6956 .write = brightness_write, 6957 .exit = brightness_exit, 6958 .suspend = brightness_suspend, 6959 .shutdown = brightness_shutdown, 6960 }; 6961 6962 /************************************************************************* 6963 * Volume subdriver 6964 */ 6965 6966 /* 6967 * IBM ThinkPads have a simple volume controller with MUTE gating. 6968 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 6969 * 6970 * Since the *61 series (and probably also the later *60 series), Lenovo 6971 * ThinkPads only implement the MUTE gate. 6972 * 6973 * EC register 0x30 6974 * Bit 6: MUTE (1 mutes sound) 6975 * Bit 3-0: Volume 6976 * Other bits should be zero as far as we know. 6977 * 6978 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 6979 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 6980 * such as bit 7 which is used to detect repeated presses of MUTE, 6981 * and we leave them unchanged. 6982 * 6983 * On newer Lenovo ThinkPads, the EC can automatically change the volume 6984 * in response to user input. Unfortunately, this rarely works well. 6985 * The laptop changes the state of its internal MUTE gate and, on some 6986 * models, sends KEY_MUTE, causing any user code that responds to the 6987 * mute button to get confused. The hardware MUTE gate is also 6988 * unnecessary, since user code can handle the mute button without 6989 * kernel or EC help. 6990 * 6991 * To avoid confusing userspace, we simply disable all EC-based mute 6992 * and volume controls when possible. 6993 */ 6994 6995 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 6996 6997 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 6998 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 6999 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7000 7001 #if SNDRV_CARDS <= 32 7002 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7003 #else 7004 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7005 #endif 7006 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7007 static char *alsa_id = "ThinkPadEC"; 7008 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7009 7010 struct tpacpi_alsa_data { 7011 struct snd_card *card; 7012 struct snd_ctl_elem_id *ctl_mute_id; 7013 struct snd_ctl_elem_id *ctl_vol_id; 7014 }; 7015 7016 static struct snd_card *alsa_card; 7017 7018 enum { 7019 TP_EC_AUDIO = 0x30, 7020 7021 /* TP_EC_AUDIO bits */ 7022 TP_EC_AUDIO_MUTESW = 6, 7023 7024 /* TP_EC_AUDIO bitmasks */ 7025 TP_EC_AUDIO_LVL_MSK = 0x0F, 7026 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7027 7028 /* Maximum volume */ 7029 TP_EC_VOLUME_MAX = 14, 7030 }; 7031 7032 enum tpacpi_volume_access_mode { 7033 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7034 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7035 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7036 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7037 TPACPI_VOL_MODE_MAX 7038 }; 7039 7040 enum tpacpi_volume_capabilities { 7041 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7042 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7043 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7044 TPACPI_VOL_CAP_MAX 7045 }; 7046 7047 enum tpacpi_mute_btn_mode { 7048 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7049 /* We don't know what mode 1 is. */ 7050 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7051 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7052 }; 7053 7054 static enum tpacpi_volume_access_mode volume_mode = 7055 TPACPI_VOL_MODE_MAX; 7056 7057 static enum tpacpi_volume_capabilities volume_capabilities; 7058 static bool volume_control_allowed; 7059 static bool software_mute_requested = true; 7060 static bool software_mute_active; 7061 static int software_mute_orig_mode; 7062 7063 /* 7064 * Used to syncronize writers to TP_EC_AUDIO and 7065 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7066 */ 7067 static struct mutex volume_mutex; 7068 7069 static void tpacpi_volume_checkpoint_nvram(void) 7070 { 7071 u8 lec = 0; 7072 u8 b_nvram; 7073 u8 ec_mask; 7074 7075 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7076 return; 7077 if (!volume_control_allowed) 7078 return; 7079 if (software_mute_active) 7080 return; 7081 7082 vdbg_printk(TPACPI_DBG_MIXER, 7083 "trying to checkpoint mixer state to NVRAM...\n"); 7084 7085 if (tp_features.mixer_no_level_control) 7086 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7087 else 7088 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7089 7090 if (mutex_lock_killable(&volume_mutex) < 0) 7091 return; 7092 7093 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7094 goto unlock; 7095 lec &= ec_mask; 7096 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7097 7098 if (lec != (b_nvram & ec_mask)) { 7099 /* NVRAM needs update */ 7100 b_nvram &= ~ec_mask; 7101 b_nvram |= lec; 7102 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7103 dbg_printk(TPACPI_DBG_MIXER, 7104 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7105 (unsigned int) lec, (unsigned int) b_nvram); 7106 } else { 7107 vdbg_printk(TPACPI_DBG_MIXER, 7108 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7109 (unsigned int) lec, (unsigned int) b_nvram); 7110 } 7111 7112 unlock: 7113 mutex_unlock(&volume_mutex); 7114 } 7115 7116 static int volume_get_status_ec(u8 *status) 7117 { 7118 u8 s; 7119 7120 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7121 return -EIO; 7122 7123 *status = s; 7124 7125 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7126 7127 return 0; 7128 } 7129 7130 static int volume_get_status(u8 *status) 7131 { 7132 return volume_get_status_ec(status); 7133 } 7134 7135 static int volume_set_status_ec(const u8 status) 7136 { 7137 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7138 return -EIO; 7139 7140 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7141 7142 /* 7143 * On X200s, and possibly on others, it can take a while for 7144 * reads to become correct. 7145 */ 7146 msleep(1); 7147 7148 return 0; 7149 } 7150 7151 static int volume_set_status(const u8 status) 7152 { 7153 return volume_set_status_ec(status); 7154 } 7155 7156 /* returns < 0 on error, 0 on no change, 1 on change */ 7157 static int __volume_set_mute_ec(const bool mute) 7158 { 7159 int rc; 7160 u8 s, n; 7161 7162 if (mutex_lock_killable(&volume_mutex) < 0) 7163 return -EINTR; 7164 7165 rc = volume_get_status_ec(&s); 7166 if (rc) 7167 goto unlock; 7168 7169 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7170 s & ~TP_EC_AUDIO_MUTESW_MSK; 7171 7172 if (n != s) { 7173 rc = volume_set_status_ec(n); 7174 if (!rc) 7175 rc = 1; 7176 } 7177 7178 unlock: 7179 mutex_unlock(&volume_mutex); 7180 return rc; 7181 } 7182 7183 static int volume_alsa_set_mute(const bool mute) 7184 { 7185 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7186 (mute) ? "" : "un"); 7187 return __volume_set_mute_ec(mute); 7188 } 7189 7190 static int volume_set_mute(const bool mute) 7191 { 7192 int rc; 7193 7194 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7195 (mute) ? "" : "un"); 7196 7197 rc = __volume_set_mute_ec(mute); 7198 return (rc < 0) ? rc : 0; 7199 } 7200 7201 /* returns < 0 on error, 0 on no change, 1 on change */ 7202 static int __volume_set_volume_ec(const u8 vol) 7203 { 7204 int rc; 7205 u8 s, n; 7206 7207 if (vol > TP_EC_VOLUME_MAX) 7208 return -EINVAL; 7209 7210 if (mutex_lock_killable(&volume_mutex) < 0) 7211 return -EINTR; 7212 7213 rc = volume_get_status_ec(&s); 7214 if (rc) 7215 goto unlock; 7216 7217 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7218 7219 if (n != s) { 7220 rc = volume_set_status_ec(n); 7221 if (!rc) 7222 rc = 1; 7223 } 7224 7225 unlock: 7226 mutex_unlock(&volume_mutex); 7227 return rc; 7228 } 7229 7230 static int volume_set_software_mute(bool startup) 7231 { 7232 int result; 7233 7234 if (!tpacpi_is_lenovo()) 7235 return -ENODEV; 7236 7237 if (startup) { 7238 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7239 "HAUM", "qd")) 7240 return -EIO; 7241 7242 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7243 "Initial HAUM setting was %d\n", 7244 software_mute_orig_mode); 7245 } 7246 7247 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7248 (int)TP_EC_MUTE_BTN_NONE)) 7249 return -EIO; 7250 7251 if (result != TP_EC_MUTE_BTN_NONE) 7252 pr_warn("Unexpected SAUM result %d\n", 7253 result); 7254 7255 /* 7256 * In software mute mode, the standard codec controls take 7257 * precendence, so we unmute the ThinkPad HW switch at 7258 * startup. Just on case there are SAUM-capable ThinkPads 7259 * with level controls, set max HW volume as well. 7260 */ 7261 if (tp_features.mixer_no_level_control) 7262 result = volume_set_mute(false); 7263 else 7264 result = volume_set_status(TP_EC_VOLUME_MAX); 7265 7266 if (result != 0) 7267 pr_warn("Failed to unmute the HW mute switch\n"); 7268 7269 return 0; 7270 } 7271 7272 static void volume_exit_software_mute(void) 7273 { 7274 int r; 7275 7276 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7277 || r != software_mute_orig_mode) 7278 pr_warn("Failed to restore mute mode\n"); 7279 } 7280 7281 static int volume_alsa_set_volume(const u8 vol) 7282 { 7283 dbg_printk(TPACPI_DBG_MIXER, 7284 "ALSA: trying to set volume level to %hu\n", vol); 7285 return __volume_set_volume_ec(vol); 7286 } 7287 7288 static void volume_alsa_notify_change(void) 7289 { 7290 struct tpacpi_alsa_data *d; 7291 7292 if (alsa_card && alsa_card->private_data) { 7293 d = alsa_card->private_data; 7294 if (d->ctl_mute_id) 7295 snd_ctl_notify(alsa_card, 7296 SNDRV_CTL_EVENT_MASK_VALUE, 7297 d->ctl_mute_id); 7298 if (d->ctl_vol_id) 7299 snd_ctl_notify(alsa_card, 7300 SNDRV_CTL_EVENT_MASK_VALUE, 7301 d->ctl_vol_id); 7302 } 7303 } 7304 7305 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7306 struct snd_ctl_elem_info *uinfo) 7307 { 7308 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7309 uinfo->count = 1; 7310 uinfo->value.integer.min = 0; 7311 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7312 return 0; 7313 } 7314 7315 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7316 struct snd_ctl_elem_value *ucontrol) 7317 { 7318 u8 s; 7319 int rc; 7320 7321 rc = volume_get_status(&s); 7322 if (rc < 0) 7323 return rc; 7324 7325 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7326 return 0; 7327 } 7328 7329 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7330 struct snd_ctl_elem_value *ucontrol) 7331 { 7332 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7333 ucontrol->value.integer.value[0]); 7334 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7335 } 7336 7337 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7338 7339 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7340 struct snd_ctl_elem_value *ucontrol) 7341 { 7342 u8 s; 7343 int rc; 7344 7345 rc = volume_get_status(&s); 7346 if (rc < 0) 7347 return rc; 7348 7349 ucontrol->value.integer.value[0] = 7350 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7351 return 0; 7352 } 7353 7354 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7355 struct snd_ctl_elem_value *ucontrol) 7356 { 7357 tpacpi_disclose_usertask("ALSA", "%smute\n", 7358 ucontrol->value.integer.value[0] ? 7359 "un" : ""); 7360 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7361 } 7362 7363 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7364 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7365 .name = "Console Playback Volume", 7366 .index = 0, 7367 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7368 .info = volume_alsa_vol_info, 7369 .get = volume_alsa_vol_get, 7370 }; 7371 7372 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7373 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7374 .name = "Console Playback Switch", 7375 .index = 0, 7376 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7377 .info = volume_alsa_mute_info, 7378 .get = volume_alsa_mute_get, 7379 }; 7380 7381 static void volume_suspend(void) 7382 { 7383 tpacpi_volume_checkpoint_nvram(); 7384 } 7385 7386 static void volume_resume(void) 7387 { 7388 if (software_mute_active) { 7389 if (volume_set_software_mute(false) < 0) 7390 pr_warn("Failed to restore software mute\n"); 7391 } else { 7392 volume_alsa_notify_change(); 7393 } 7394 } 7395 7396 static void volume_shutdown(void) 7397 { 7398 tpacpi_volume_checkpoint_nvram(); 7399 } 7400 7401 static void volume_exit(void) 7402 { 7403 if (alsa_card) { 7404 snd_card_free(alsa_card); 7405 alsa_card = NULL; 7406 } 7407 7408 tpacpi_volume_checkpoint_nvram(); 7409 7410 if (software_mute_active) 7411 volume_exit_software_mute(); 7412 } 7413 7414 static int __init volume_create_alsa_mixer(void) 7415 { 7416 struct snd_card *card; 7417 struct tpacpi_alsa_data *data; 7418 struct snd_kcontrol *ctl_vol; 7419 struct snd_kcontrol *ctl_mute; 7420 int rc; 7421 7422 rc = snd_card_new(&tpacpi_pdev->dev, 7423 alsa_index, alsa_id, THIS_MODULE, 7424 sizeof(struct tpacpi_alsa_data), &card); 7425 if (rc < 0 || !card) { 7426 pr_err("Failed to create ALSA card structures: %d\n", rc); 7427 return 1; 7428 } 7429 7430 BUG_ON(!card->private_data); 7431 data = card->private_data; 7432 data->card = card; 7433 7434 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7435 sizeof(card->driver)); 7436 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7437 sizeof(card->shortname)); 7438 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7439 (thinkpad_id.ec_version_str) ? 7440 thinkpad_id.ec_version_str : "(unknown)"); 7441 snprintf(card->longname, sizeof(card->longname), 7442 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7443 (thinkpad_id.ec_version_str) ? 7444 thinkpad_id.ec_version_str : "unknown"); 7445 7446 if (volume_control_allowed) { 7447 volume_alsa_control_vol.put = volume_alsa_vol_put; 7448 volume_alsa_control_vol.access = 7449 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7450 7451 volume_alsa_control_mute.put = volume_alsa_mute_put; 7452 volume_alsa_control_mute.access = 7453 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7454 } 7455 7456 if (!tp_features.mixer_no_level_control) { 7457 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7458 rc = snd_ctl_add(card, ctl_vol); 7459 if (rc < 0) { 7460 pr_err("Failed to create ALSA volume control: %d\n", 7461 rc); 7462 goto err_exit; 7463 } 7464 data->ctl_vol_id = &ctl_vol->id; 7465 } 7466 7467 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7468 rc = snd_ctl_add(card, ctl_mute); 7469 if (rc < 0) { 7470 pr_err("Failed to create ALSA mute control: %d\n", rc); 7471 goto err_exit; 7472 } 7473 data->ctl_mute_id = &ctl_mute->id; 7474 7475 rc = snd_card_register(card); 7476 if (rc < 0) { 7477 pr_err("Failed to register ALSA card: %d\n", rc); 7478 goto err_exit; 7479 } 7480 7481 alsa_card = card; 7482 return 0; 7483 7484 err_exit: 7485 snd_card_free(card); 7486 return 1; 7487 } 7488 7489 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7490 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7491 7492 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7493 /* Whitelist volume level on all IBM by default */ 7494 { .vendor = PCI_VENDOR_ID_IBM, 7495 .bios = TPACPI_MATCH_ANY, 7496 .ec = TPACPI_MATCH_ANY, 7497 .quirks = TPACPI_VOL_Q_LEVEL }, 7498 7499 /* Lenovo models with volume control (needs confirmation) */ 7500 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7501 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7502 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7503 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7504 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7505 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7506 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7507 7508 /* Whitelist mute-only on all Lenovo by default */ 7509 { .vendor = PCI_VENDOR_ID_LENOVO, 7510 .bios = TPACPI_MATCH_ANY, 7511 .ec = TPACPI_MATCH_ANY, 7512 .quirks = TPACPI_VOL_Q_MUTEONLY } 7513 }; 7514 7515 static int __init volume_init(struct ibm_init_struct *iibm) 7516 { 7517 unsigned long quirks; 7518 int rc; 7519 7520 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7521 7522 mutex_init(&volume_mutex); 7523 7524 /* 7525 * Check for module parameter bogosity, note that we 7526 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7527 * able to detect "unspecified" 7528 */ 7529 if (volume_mode > TPACPI_VOL_MODE_MAX) 7530 return -EINVAL; 7531 7532 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7533 pr_err("UCMS step volume mode not implemented, " 7534 "please contact %s\n", TPACPI_MAIL); 7535 return 1; 7536 } 7537 7538 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7539 return -EINVAL; 7540 7541 /* 7542 * The ALSA mixer is our primary interface. 7543 * When disabled, don't install the subdriver at all 7544 */ 7545 if (!alsa_enable) { 7546 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7547 "ALSA mixer disabled by parameter, " 7548 "not loading volume subdriver...\n"); 7549 return 1; 7550 } 7551 7552 quirks = tpacpi_check_quirks(volume_quirk_table, 7553 ARRAY_SIZE(volume_quirk_table)); 7554 7555 switch (volume_capabilities) { 7556 case TPACPI_VOL_CAP_AUTO: 7557 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7558 tp_features.mixer_no_level_control = 1; 7559 else if (quirks & TPACPI_VOL_Q_LEVEL) 7560 tp_features.mixer_no_level_control = 0; 7561 else 7562 return 1; /* no mixer */ 7563 break; 7564 case TPACPI_VOL_CAP_VOLMUTE: 7565 tp_features.mixer_no_level_control = 0; 7566 break; 7567 case TPACPI_VOL_CAP_MUTEONLY: 7568 tp_features.mixer_no_level_control = 1; 7569 break; 7570 default: 7571 return 1; 7572 } 7573 7574 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7575 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7576 "using user-supplied volume_capabilities=%d\n", 7577 volume_capabilities); 7578 7579 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7580 volume_mode == TPACPI_VOL_MODE_MAX) { 7581 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7582 7583 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7584 "driver auto-selected volume_mode=%d\n", 7585 volume_mode); 7586 } else { 7587 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7588 "using user-supplied volume_mode=%d\n", 7589 volume_mode); 7590 } 7591 7592 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7593 "mute is supported, volume control is %s\n", 7594 str_supported(!tp_features.mixer_no_level_control)); 7595 7596 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7597 software_mute_active = true; 7598 } else { 7599 rc = volume_create_alsa_mixer(); 7600 if (rc) { 7601 pr_err("Could not create the ALSA mixer interface\n"); 7602 return rc; 7603 } 7604 7605 pr_info("Console audio control enabled, mode: %s\n", 7606 (volume_control_allowed) ? 7607 "override (read/write)" : 7608 "monitor (read only)"); 7609 } 7610 7611 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7612 "registering volume hotkeys as change notification\n"); 7613 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7614 | TP_ACPI_HKEY_VOLUP_MASK 7615 | TP_ACPI_HKEY_VOLDWN_MASK 7616 | TP_ACPI_HKEY_MUTE_MASK); 7617 7618 return 0; 7619 } 7620 7621 static int volume_read(struct seq_file *m) 7622 { 7623 u8 status; 7624 7625 if (volume_get_status(&status) < 0) { 7626 seq_printf(m, "level:\t\tunreadable\n"); 7627 } else { 7628 if (tp_features.mixer_no_level_control) 7629 seq_printf(m, "level:\t\tunsupported\n"); 7630 else 7631 seq_printf(m, "level:\t\t%d\n", 7632 status & TP_EC_AUDIO_LVL_MSK); 7633 7634 seq_printf(m, "mute:\t\t%s\n", 7635 onoff(status, TP_EC_AUDIO_MUTESW)); 7636 7637 if (volume_control_allowed) { 7638 seq_printf(m, "commands:\tunmute, mute\n"); 7639 if (!tp_features.mixer_no_level_control) { 7640 seq_printf(m, 7641 "commands:\tup, down\n"); 7642 seq_printf(m, 7643 "commands:\tlevel <level>" 7644 " (<level> is 0-%d)\n", 7645 TP_EC_VOLUME_MAX); 7646 } 7647 } 7648 } 7649 7650 return 0; 7651 } 7652 7653 static int volume_write(char *buf) 7654 { 7655 u8 s; 7656 u8 new_level, new_mute; 7657 int l; 7658 char *cmd; 7659 int rc; 7660 7661 /* 7662 * We do allow volume control at driver startup, so that the 7663 * user can set initial state through the volume=... parameter hack. 7664 */ 7665 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7666 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7667 tp_warned.volume_ctrl_forbidden = 1; 7668 pr_notice("Console audio control in monitor mode, " 7669 "changes are not allowed\n"); 7670 pr_notice("Use the volume_control=1 module parameter " 7671 "to enable volume control\n"); 7672 } 7673 return -EPERM; 7674 } 7675 7676 rc = volume_get_status(&s); 7677 if (rc < 0) 7678 return rc; 7679 7680 new_level = s & TP_EC_AUDIO_LVL_MSK; 7681 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7682 7683 while ((cmd = next_cmd(&buf))) { 7684 if (!tp_features.mixer_no_level_control) { 7685 if (strlencmp(cmd, "up") == 0) { 7686 if (new_mute) 7687 new_mute = 0; 7688 else if (new_level < TP_EC_VOLUME_MAX) 7689 new_level++; 7690 continue; 7691 } else if (strlencmp(cmd, "down") == 0) { 7692 if (new_mute) 7693 new_mute = 0; 7694 else if (new_level > 0) 7695 new_level--; 7696 continue; 7697 } else if (sscanf(cmd, "level %u", &l) == 1 && 7698 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7699 new_level = l; 7700 continue; 7701 } 7702 } 7703 if (strlencmp(cmd, "mute") == 0) 7704 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7705 else if (strlencmp(cmd, "unmute") == 0) 7706 new_mute = 0; 7707 else 7708 return -EINVAL; 7709 } 7710 7711 if (tp_features.mixer_no_level_control) { 7712 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7713 new_mute ? "" : "un"); 7714 rc = volume_set_mute(!!new_mute); 7715 } else { 7716 tpacpi_disclose_usertask("procfs volume", 7717 "%smute and set level to %d\n", 7718 new_mute ? "" : "un", new_level); 7719 rc = volume_set_status(new_mute | new_level); 7720 } 7721 volume_alsa_notify_change(); 7722 7723 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7724 } 7725 7726 static struct ibm_struct volume_driver_data = { 7727 .name = "volume", 7728 .read = volume_read, 7729 .write = volume_write, 7730 .exit = volume_exit, 7731 .suspend = volume_suspend, 7732 .resume = volume_resume, 7733 .shutdown = volume_shutdown, 7734 }; 7735 7736 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7737 7738 #define alsa_card NULL 7739 7740 static inline void volume_alsa_notify_change(void) 7741 { 7742 } 7743 7744 static int __init volume_init(struct ibm_init_struct *iibm) 7745 { 7746 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7747 7748 return 1; 7749 } 7750 7751 static struct ibm_struct volume_driver_data = { 7752 .name = "volume", 7753 }; 7754 7755 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7756 7757 /************************************************************************* 7758 * Fan subdriver 7759 */ 7760 7761 /* 7762 * FAN ACCESS MODES 7763 * 7764 * TPACPI_FAN_RD_ACPI_GFAN: 7765 * ACPI GFAN method: returns fan level 7766 * 7767 * see TPACPI_FAN_WR_ACPI_SFAN 7768 * EC 0x2f (HFSP) not available if GFAN exists 7769 * 7770 * TPACPI_FAN_WR_ACPI_SFAN: 7771 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7772 * 7773 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7774 * it for writing. 7775 * 7776 * TPACPI_FAN_WR_TPEC: 7777 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7778 * Supported on almost all ThinkPads 7779 * 7780 * Fan speed changes of any sort (including those caused by the 7781 * disengaged mode) are usually done slowly by the firmware as the 7782 * maximum amount of fan duty cycle change per second seems to be 7783 * limited. 7784 * 7785 * Reading is not available if GFAN exists. 7786 * Writing is not available if SFAN exists. 7787 * 7788 * Bits 7789 * 7 automatic mode engaged; 7790 * (default operation mode of the ThinkPad) 7791 * fan level is ignored in this mode. 7792 * 6 full speed mode (takes precedence over bit 7); 7793 * not available on all thinkpads. May disable 7794 * the tachometer while the fan controller ramps up 7795 * the speed (which can take up to a few *minutes*). 7796 * Speeds up fan to 100% duty-cycle, which is far above 7797 * the standard RPM levels. It is not impossible that 7798 * it could cause hardware damage. 7799 * 5-3 unused in some models. Extra bits for fan level 7800 * in others, but still useless as all values above 7801 * 7 map to the same speed as level 7 in these models. 7802 * 2-0 fan level (0..7 usually) 7803 * 0x00 = stop 7804 * 0x07 = max (set when temperatures critical) 7805 * Some ThinkPads may have other levels, see 7806 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7807 * 7808 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7809 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7810 * does so, its initial value is meaningless (0x07). 7811 * 7812 * For firmware bugs, refer to: 7813 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7814 * 7815 * ---- 7816 * 7817 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7818 * Main fan tachometer reading (in RPM) 7819 * 7820 * This register is present on all ThinkPads with a new-style EC, and 7821 * it is known not to be present on the A21m/e, and T22, as there is 7822 * something else in offset 0x84 according to the ACPI DSDT. Other 7823 * ThinkPads from this same time period (and earlier) probably lack the 7824 * tachometer as well. 7825 * 7826 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7827 * was never fixed by IBM to report the EC firmware version string 7828 * probably support the tachometer (like the early X models), so 7829 * detecting it is quite hard. We need more data to know for sure. 7830 * 7831 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7832 * might result. 7833 * 7834 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7835 * mode. 7836 * 7837 * For firmware bugs, refer to: 7838 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7839 * 7840 * ---- 7841 * 7842 * ThinkPad EC register 0x31 bit 0 (only on select models) 7843 * 7844 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7845 * show the speed of the main fan. When bit 0 of EC register 0x31 7846 * is one, the tachometer registers show the speed of the auxiliary 7847 * fan. 7848 * 7849 * Fan control seems to affect both fans, regardless of the state 7850 * of this bit. 7851 * 7852 * So far, only the firmware for the X60/X61 non-tablet versions 7853 * seem to support this (firmware TP-7M). 7854 * 7855 * TPACPI_FAN_WR_ACPI_FANS: 7856 * ThinkPad X31, X40, X41. Not available in the X60. 7857 * 7858 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7859 * high speed. ACPI DSDT seems to map these three speeds to levels 7860 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7861 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7862 * 7863 * The speeds are stored on handles 7864 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7865 * 7866 * There are three default speed sets, accessible as handles: 7867 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7868 * 7869 * ACPI DSDT switches which set is in use depending on various 7870 * factors. 7871 * 7872 * TPACPI_FAN_WR_TPEC is also available and should be used to 7873 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7874 * but the ACPI tables just mention level 7. 7875 */ 7876 7877 enum { /* Fan control constants */ 7878 fan_status_offset = 0x2f, /* EC register 0x2f */ 7879 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7880 * 0x84 must be read before 0x85 */ 7881 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7882 bit 0 selects which fan is active */ 7883 7884 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7885 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7886 7887 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7888 }; 7889 7890 enum fan_status_access_mode { 7891 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7892 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7893 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7894 }; 7895 7896 enum fan_control_access_mode { 7897 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7898 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7899 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7900 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7901 }; 7902 7903 enum fan_control_commands { 7904 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7905 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7906 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7907 * and also watchdog cmd */ 7908 }; 7909 7910 static bool fan_control_allowed; 7911 7912 static enum fan_status_access_mode fan_status_access_mode; 7913 static enum fan_control_access_mode fan_control_access_mode; 7914 static enum fan_control_commands fan_control_commands; 7915 7916 static u8 fan_control_initial_status; 7917 static u8 fan_control_desired_level; 7918 static u8 fan_control_resume_level; 7919 static int fan_watchdog_maxinterval; 7920 7921 static struct mutex fan_mutex; 7922 7923 static void fan_watchdog_fire(struct work_struct *ignored); 7924 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7925 7926 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7927 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7928 "\\FSPD", /* 600e/x, 770e, 770x */ 7929 ); /* all others */ 7930 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7931 "JFNS", /* 770x-JL */ 7932 ); /* all others */ 7933 7934 /* 7935 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7936 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7937 * be in auto mode (0x80). 7938 * 7939 * This is corrected by any write to HFSP either by the driver, or 7940 * by the firmware. 7941 * 7942 * We assume 0x07 really means auto mode while this quirk is active, 7943 * as this is far more likely than the ThinkPad being in level 7, 7944 * which is only used by the firmware during thermal emergencies. 7945 * 7946 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7947 * TP-70 (T43, R52), which are known to be buggy. 7948 */ 7949 7950 static void fan_quirk1_setup(void) 7951 { 7952 if (fan_control_initial_status == 0x07) { 7953 pr_notice("fan_init: initial fan status is unknown, " 7954 "assuming it is in auto mode\n"); 7955 tp_features.fan_ctrl_status_undef = 1; 7956 } 7957 } 7958 7959 static void fan_quirk1_handle(u8 *fan_status) 7960 { 7961 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7962 if (*fan_status != fan_control_initial_status) { 7963 /* something changed the HFSP regisnter since 7964 * driver init time, so it is not undefined 7965 * anymore */ 7966 tp_features.fan_ctrl_status_undef = 0; 7967 } else { 7968 /* Return most likely status. In fact, it 7969 * might be the only possible status */ 7970 *fan_status = TP_EC_FAN_AUTO; 7971 } 7972 } 7973 } 7974 7975 /* Select main fan on X60/X61, NOOP on others */ 7976 static bool fan_select_fan1(void) 7977 { 7978 if (tp_features.second_fan) { 7979 u8 val; 7980 7981 if (ec_read(fan_select_offset, &val) < 0) 7982 return false; 7983 val &= 0xFEU; 7984 if (ec_write(fan_select_offset, val) < 0) 7985 return false; 7986 } 7987 return true; 7988 } 7989 7990 /* Select secondary fan on X60/X61 */ 7991 static bool fan_select_fan2(void) 7992 { 7993 u8 val; 7994 7995 if (!tp_features.second_fan) 7996 return false; 7997 7998 if (ec_read(fan_select_offset, &val) < 0) 7999 return false; 8000 val |= 0x01U; 8001 if (ec_write(fan_select_offset, val) < 0) 8002 return false; 8003 8004 return true; 8005 } 8006 8007 /* 8008 * Call with fan_mutex held 8009 */ 8010 static void fan_update_desired_level(u8 status) 8011 { 8012 if ((status & 8013 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8014 if (status > 7) 8015 fan_control_desired_level = 7; 8016 else 8017 fan_control_desired_level = status; 8018 } 8019 } 8020 8021 static int fan_get_status(u8 *status) 8022 { 8023 u8 s; 8024 8025 /* TODO: 8026 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8027 8028 switch (fan_status_access_mode) { 8029 case TPACPI_FAN_RD_ACPI_GFAN: { 8030 /* 570, 600e/x, 770e, 770x */ 8031 int res; 8032 8033 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8034 return -EIO; 8035 8036 if (likely(status)) 8037 *status = res & 0x07; 8038 8039 break; 8040 } 8041 case TPACPI_FAN_RD_TPEC: 8042 /* all except 570, 600e/x, 770e, 770x */ 8043 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8044 return -EIO; 8045 8046 if (likely(status)) { 8047 *status = s; 8048 fan_quirk1_handle(status); 8049 } 8050 8051 break; 8052 8053 default: 8054 return -ENXIO; 8055 } 8056 8057 return 0; 8058 } 8059 8060 static int fan_get_status_safe(u8 *status) 8061 { 8062 int rc; 8063 u8 s; 8064 8065 if (mutex_lock_killable(&fan_mutex)) 8066 return -ERESTARTSYS; 8067 rc = fan_get_status(&s); 8068 if (!rc) 8069 fan_update_desired_level(s); 8070 mutex_unlock(&fan_mutex); 8071 8072 if (rc) 8073 return rc; 8074 if (status) 8075 *status = s; 8076 8077 return 0; 8078 } 8079 8080 static int fan_get_speed(unsigned int *speed) 8081 { 8082 u8 hi, lo; 8083 8084 switch (fan_status_access_mode) { 8085 case TPACPI_FAN_RD_TPEC: 8086 /* all except 570, 600e/x, 770e, 770x */ 8087 if (unlikely(!fan_select_fan1())) 8088 return -EIO; 8089 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8090 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8091 return -EIO; 8092 8093 if (likely(speed)) 8094 *speed = (hi << 8) | lo; 8095 8096 break; 8097 8098 default: 8099 return -ENXIO; 8100 } 8101 8102 return 0; 8103 } 8104 8105 static int fan2_get_speed(unsigned int *speed) 8106 { 8107 u8 hi, lo; 8108 bool rc; 8109 8110 switch (fan_status_access_mode) { 8111 case TPACPI_FAN_RD_TPEC: 8112 /* all except 570, 600e/x, 770e, 770x */ 8113 if (unlikely(!fan_select_fan2())) 8114 return -EIO; 8115 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8116 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8117 fan_select_fan1(); /* play it safe */ 8118 if (rc) 8119 return -EIO; 8120 8121 if (likely(speed)) 8122 *speed = (hi << 8) | lo; 8123 8124 break; 8125 8126 default: 8127 return -ENXIO; 8128 } 8129 8130 return 0; 8131 } 8132 8133 static int fan_set_level(int level) 8134 { 8135 if (!fan_control_allowed) 8136 return -EPERM; 8137 8138 switch (fan_control_access_mode) { 8139 case TPACPI_FAN_WR_ACPI_SFAN: 8140 if (level >= 0 && level <= 7) { 8141 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8142 return -EIO; 8143 } else 8144 return -EINVAL; 8145 break; 8146 8147 case TPACPI_FAN_WR_ACPI_FANS: 8148 case TPACPI_FAN_WR_TPEC: 8149 if (!(level & TP_EC_FAN_AUTO) && 8150 !(level & TP_EC_FAN_FULLSPEED) && 8151 ((level < 0) || (level > 7))) 8152 return -EINVAL; 8153 8154 /* safety net should the EC not support AUTO 8155 * or FULLSPEED mode bits and just ignore them */ 8156 if (level & TP_EC_FAN_FULLSPEED) 8157 level |= 7; /* safety min speed 7 */ 8158 else if (level & TP_EC_FAN_AUTO) 8159 level |= 4; /* safety min speed 4 */ 8160 8161 if (!acpi_ec_write(fan_status_offset, level)) 8162 return -EIO; 8163 else 8164 tp_features.fan_ctrl_status_undef = 0; 8165 break; 8166 8167 default: 8168 return -ENXIO; 8169 } 8170 8171 vdbg_printk(TPACPI_DBG_FAN, 8172 "fan control: set fan control register to 0x%02x\n", level); 8173 return 0; 8174 } 8175 8176 static int fan_set_level_safe(int level) 8177 { 8178 int rc; 8179 8180 if (!fan_control_allowed) 8181 return -EPERM; 8182 8183 if (mutex_lock_killable(&fan_mutex)) 8184 return -ERESTARTSYS; 8185 8186 if (level == TPACPI_FAN_LAST_LEVEL) 8187 level = fan_control_desired_level; 8188 8189 rc = fan_set_level(level); 8190 if (!rc) 8191 fan_update_desired_level(level); 8192 8193 mutex_unlock(&fan_mutex); 8194 return rc; 8195 } 8196 8197 static int fan_set_enable(void) 8198 { 8199 u8 s; 8200 int rc; 8201 8202 if (!fan_control_allowed) 8203 return -EPERM; 8204 8205 if (mutex_lock_killable(&fan_mutex)) 8206 return -ERESTARTSYS; 8207 8208 switch (fan_control_access_mode) { 8209 case TPACPI_FAN_WR_ACPI_FANS: 8210 case TPACPI_FAN_WR_TPEC: 8211 rc = fan_get_status(&s); 8212 if (rc < 0) 8213 break; 8214 8215 /* Don't go out of emergency fan mode */ 8216 if (s != 7) { 8217 s &= 0x07; 8218 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8219 } 8220 8221 if (!acpi_ec_write(fan_status_offset, s)) 8222 rc = -EIO; 8223 else { 8224 tp_features.fan_ctrl_status_undef = 0; 8225 rc = 0; 8226 } 8227 break; 8228 8229 case TPACPI_FAN_WR_ACPI_SFAN: 8230 rc = fan_get_status(&s); 8231 if (rc < 0) 8232 break; 8233 8234 s &= 0x07; 8235 8236 /* Set fan to at least level 4 */ 8237 s |= 4; 8238 8239 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8240 rc = -EIO; 8241 else 8242 rc = 0; 8243 break; 8244 8245 default: 8246 rc = -ENXIO; 8247 } 8248 8249 mutex_unlock(&fan_mutex); 8250 8251 if (!rc) 8252 vdbg_printk(TPACPI_DBG_FAN, 8253 "fan control: set fan control register to 0x%02x\n", 8254 s); 8255 return rc; 8256 } 8257 8258 static int fan_set_disable(void) 8259 { 8260 int rc; 8261 8262 if (!fan_control_allowed) 8263 return -EPERM; 8264 8265 if (mutex_lock_killable(&fan_mutex)) 8266 return -ERESTARTSYS; 8267 8268 rc = 0; 8269 switch (fan_control_access_mode) { 8270 case TPACPI_FAN_WR_ACPI_FANS: 8271 case TPACPI_FAN_WR_TPEC: 8272 if (!acpi_ec_write(fan_status_offset, 0x00)) 8273 rc = -EIO; 8274 else { 8275 fan_control_desired_level = 0; 8276 tp_features.fan_ctrl_status_undef = 0; 8277 } 8278 break; 8279 8280 case TPACPI_FAN_WR_ACPI_SFAN: 8281 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8282 rc = -EIO; 8283 else 8284 fan_control_desired_level = 0; 8285 break; 8286 8287 default: 8288 rc = -ENXIO; 8289 } 8290 8291 if (!rc) 8292 vdbg_printk(TPACPI_DBG_FAN, 8293 "fan control: set fan control register to 0\n"); 8294 8295 mutex_unlock(&fan_mutex); 8296 return rc; 8297 } 8298 8299 static int fan_set_speed(int speed) 8300 { 8301 int rc; 8302 8303 if (!fan_control_allowed) 8304 return -EPERM; 8305 8306 if (mutex_lock_killable(&fan_mutex)) 8307 return -ERESTARTSYS; 8308 8309 rc = 0; 8310 switch (fan_control_access_mode) { 8311 case TPACPI_FAN_WR_ACPI_FANS: 8312 if (speed >= 0 && speed <= 65535) { 8313 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8314 speed, speed, speed)) 8315 rc = -EIO; 8316 } else 8317 rc = -EINVAL; 8318 break; 8319 8320 default: 8321 rc = -ENXIO; 8322 } 8323 8324 mutex_unlock(&fan_mutex); 8325 return rc; 8326 } 8327 8328 static void fan_watchdog_reset(void) 8329 { 8330 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8331 return; 8332 8333 if (fan_watchdog_maxinterval > 0 && 8334 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8335 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8336 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8337 else 8338 cancel_delayed_work(&fan_watchdog_task); 8339 } 8340 8341 static void fan_watchdog_fire(struct work_struct *ignored) 8342 { 8343 int rc; 8344 8345 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8346 return; 8347 8348 pr_notice("fan watchdog: enabling fan\n"); 8349 rc = fan_set_enable(); 8350 if (rc < 0) { 8351 pr_err("fan watchdog: error %d while enabling fan, " 8352 "will try again later...\n", -rc); 8353 /* reschedule for later */ 8354 fan_watchdog_reset(); 8355 } 8356 } 8357 8358 /* 8359 * SYSFS fan layout: hwmon compatible (device) 8360 * 8361 * pwm*_enable: 8362 * 0: "disengaged" mode 8363 * 1: manual mode 8364 * 2: native EC "auto" mode (recommended, hardware default) 8365 * 8366 * pwm*: set speed in manual mode, ignored otherwise. 8367 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8368 * interpolation. 8369 * 8370 * fan*_input: tachometer reading, RPM 8371 * 8372 * 8373 * SYSFS fan layout: extensions 8374 * 8375 * fan_watchdog (driver): 8376 * fan watchdog interval in seconds, 0 disables (default), max 120 8377 */ 8378 8379 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8380 static ssize_t fan_pwm1_enable_show(struct device *dev, 8381 struct device_attribute *attr, 8382 char *buf) 8383 { 8384 int res, mode; 8385 u8 status; 8386 8387 res = fan_get_status_safe(&status); 8388 if (res) 8389 return res; 8390 8391 if (status & TP_EC_FAN_FULLSPEED) { 8392 mode = 0; 8393 } else if (status & TP_EC_FAN_AUTO) { 8394 mode = 2; 8395 } else 8396 mode = 1; 8397 8398 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8399 } 8400 8401 static ssize_t fan_pwm1_enable_store(struct device *dev, 8402 struct device_attribute *attr, 8403 const char *buf, size_t count) 8404 { 8405 unsigned long t; 8406 int res, level; 8407 8408 if (parse_strtoul(buf, 2, &t)) 8409 return -EINVAL; 8410 8411 tpacpi_disclose_usertask("hwmon pwm1_enable", 8412 "set fan mode to %lu\n", t); 8413 8414 switch (t) { 8415 case 0: 8416 level = TP_EC_FAN_FULLSPEED; 8417 break; 8418 case 1: 8419 level = TPACPI_FAN_LAST_LEVEL; 8420 break; 8421 case 2: 8422 level = TP_EC_FAN_AUTO; 8423 break; 8424 case 3: 8425 /* reserved for software-controlled auto mode */ 8426 return -ENOSYS; 8427 default: 8428 return -EINVAL; 8429 } 8430 8431 res = fan_set_level_safe(level); 8432 if (res == -ENXIO) 8433 return -EINVAL; 8434 else if (res < 0) 8435 return res; 8436 8437 fan_watchdog_reset(); 8438 8439 return count; 8440 } 8441 8442 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8443 fan_pwm1_enable_show, fan_pwm1_enable_store); 8444 8445 /* sysfs fan pwm1 ------------------------------------------------------ */ 8446 static ssize_t fan_pwm1_show(struct device *dev, 8447 struct device_attribute *attr, 8448 char *buf) 8449 { 8450 int res; 8451 u8 status; 8452 8453 res = fan_get_status_safe(&status); 8454 if (res) 8455 return res; 8456 8457 if ((status & 8458 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8459 status = fan_control_desired_level; 8460 8461 if (status > 7) 8462 status = 7; 8463 8464 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8465 } 8466 8467 static ssize_t fan_pwm1_store(struct device *dev, 8468 struct device_attribute *attr, 8469 const char *buf, size_t count) 8470 { 8471 unsigned long s; 8472 int rc; 8473 u8 status, newlevel; 8474 8475 if (parse_strtoul(buf, 255, &s)) 8476 return -EINVAL; 8477 8478 tpacpi_disclose_usertask("hwmon pwm1", 8479 "set fan speed to %lu\n", s); 8480 8481 /* scale down from 0-255 to 0-7 */ 8482 newlevel = (s >> 5) & 0x07; 8483 8484 if (mutex_lock_killable(&fan_mutex)) 8485 return -ERESTARTSYS; 8486 8487 rc = fan_get_status(&status); 8488 if (!rc && (status & 8489 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8490 rc = fan_set_level(newlevel); 8491 if (rc == -ENXIO) 8492 rc = -EINVAL; 8493 else if (!rc) { 8494 fan_update_desired_level(newlevel); 8495 fan_watchdog_reset(); 8496 } 8497 } 8498 8499 mutex_unlock(&fan_mutex); 8500 return (rc) ? rc : count; 8501 } 8502 8503 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8504 8505 /* sysfs fan fan1_input ------------------------------------------------ */ 8506 static ssize_t fan_fan1_input_show(struct device *dev, 8507 struct device_attribute *attr, 8508 char *buf) 8509 { 8510 int res; 8511 unsigned int speed; 8512 8513 res = fan_get_speed(&speed); 8514 if (res < 0) 8515 return res; 8516 8517 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8518 } 8519 8520 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8521 8522 /* sysfs fan fan2_input ------------------------------------------------ */ 8523 static ssize_t fan_fan2_input_show(struct device *dev, 8524 struct device_attribute *attr, 8525 char *buf) 8526 { 8527 int res; 8528 unsigned int speed; 8529 8530 res = fan2_get_speed(&speed); 8531 if (res < 0) 8532 return res; 8533 8534 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8535 } 8536 8537 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8538 8539 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8540 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 8541 char *buf) 8542 { 8543 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8544 } 8545 8546 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 8547 const char *buf, size_t count) 8548 { 8549 unsigned long t; 8550 8551 if (parse_strtoul(buf, 120, &t)) 8552 return -EINVAL; 8553 8554 if (!fan_control_allowed) 8555 return -EPERM; 8556 8557 fan_watchdog_maxinterval = t; 8558 fan_watchdog_reset(); 8559 8560 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8561 8562 return count; 8563 } 8564 8565 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 8566 fan_fan_watchdog_show, fan_fan_watchdog_store); 8567 8568 /* --------------------------------------------------------------------- */ 8569 static struct attribute *fan_attributes[] = { 8570 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8571 &dev_attr_fan1_input.attr, 8572 NULL, /* for fan2_input */ 8573 NULL 8574 }; 8575 8576 static const struct attribute_group fan_attr_group = { 8577 .attrs = fan_attributes, 8578 }; 8579 8580 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8581 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8582 8583 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 8584 { .vendor = PCI_VENDOR_ID_IBM, \ 8585 .bios = TPACPI_MATCH_ANY, \ 8586 .ec = TPID(__id1, __id2), \ 8587 .quirks = __quirks } 8588 8589 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 8590 { .vendor = PCI_VENDOR_ID_LENOVO, \ 8591 .bios = TPACPI_MATCH_ANY, \ 8592 .ec = TPID(__id1, __id2), \ 8593 .quirks = __quirks } 8594 8595 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8596 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 8597 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 8598 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 8599 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 8600 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 8601 }; 8602 8603 #undef TPACPI_FAN_QL 8604 #undef TPACPI_FAN_QI 8605 8606 static int __init fan_init(struct ibm_init_struct *iibm) 8607 { 8608 int rc; 8609 unsigned long quirks; 8610 8611 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8612 "initializing fan subdriver\n"); 8613 8614 mutex_init(&fan_mutex); 8615 fan_status_access_mode = TPACPI_FAN_NONE; 8616 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8617 fan_control_commands = 0; 8618 fan_watchdog_maxinterval = 0; 8619 tp_features.fan_ctrl_status_undef = 0; 8620 tp_features.second_fan = 0; 8621 fan_control_desired_level = 7; 8622 8623 if (tpacpi_is_ibm()) { 8624 TPACPI_ACPIHANDLE_INIT(fans); 8625 TPACPI_ACPIHANDLE_INIT(gfan); 8626 TPACPI_ACPIHANDLE_INIT(sfan); 8627 } 8628 8629 quirks = tpacpi_check_quirks(fan_quirk_table, 8630 ARRAY_SIZE(fan_quirk_table)); 8631 8632 if (gfan_handle) { 8633 /* 570, 600e/x, 770e, 770x */ 8634 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8635 } else { 8636 /* all other ThinkPads: note that even old-style 8637 * ThinkPad ECs supports the fan control register */ 8638 if (likely(acpi_ec_read(fan_status_offset, 8639 &fan_control_initial_status))) { 8640 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8641 if (quirks & TPACPI_FAN_Q1) 8642 fan_quirk1_setup(); 8643 if (quirks & TPACPI_FAN_2FAN) { 8644 tp_features.second_fan = 1; 8645 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8646 "secondary fan support enabled\n"); 8647 } 8648 } else { 8649 pr_err("ThinkPad ACPI EC access misbehaving, " 8650 "fan status and control unavailable\n"); 8651 return 1; 8652 } 8653 } 8654 8655 if (sfan_handle) { 8656 /* 570, 770x-JL */ 8657 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8658 fan_control_commands |= 8659 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8660 } else { 8661 if (!gfan_handle) { 8662 /* gfan without sfan means no fan control */ 8663 /* all other models implement TP EC 0x2f control */ 8664 8665 if (fans_handle) { 8666 /* X31, X40, X41 */ 8667 fan_control_access_mode = 8668 TPACPI_FAN_WR_ACPI_FANS; 8669 fan_control_commands |= 8670 TPACPI_FAN_CMD_SPEED | 8671 TPACPI_FAN_CMD_LEVEL | 8672 TPACPI_FAN_CMD_ENABLE; 8673 } else { 8674 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8675 fan_control_commands |= 8676 TPACPI_FAN_CMD_LEVEL | 8677 TPACPI_FAN_CMD_ENABLE; 8678 } 8679 } 8680 } 8681 8682 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8683 "fan is %s, modes %d, %d\n", 8684 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8685 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8686 fan_status_access_mode, fan_control_access_mode); 8687 8688 /* fan control master switch */ 8689 if (!fan_control_allowed) { 8690 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8691 fan_control_commands = 0; 8692 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8693 "fan control features disabled by parameter\n"); 8694 } 8695 8696 /* update fan_control_desired_level */ 8697 if (fan_status_access_mode != TPACPI_FAN_NONE) 8698 fan_get_status_safe(NULL); 8699 8700 if (fan_status_access_mode != TPACPI_FAN_NONE || 8701 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8702 if (tp_features.second_fan) { 8703 /* attach second fan tachometer */ 8704 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8705 &dev_attr_fan2_input.attr; 8706 } 8707 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8708 &fan_attr_group); 8709 if (rc < 0) 8710 return rc; 8711 8712 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8713 &driver_attr_fan_watchdog); 8714 if (rc < 0) { 8715 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8716 &fan_attr_group); 8717 return rc; 8718 } 8719 return 0; 8720 } else 8721 return 1; 8722 } 8723 8724 static void fan_exit(void) 8725 { 8726 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8727 "cancelling any pending fan watchdog tasks\n"); 8728 8729 /* FIXME: can we really do this unconditionally? */ 8730 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8731 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8732 &driver_attr_fan_watchdog); 8733 8734 cancel_delayed_work(&fan_watchdog_task); 8735 flush_workqueue(tpacpi_wq); 8736 } 8737 8738 static void fan_suspend(void) 8739 { 8740 int rc; 8741 8742 if (!fan_control_allowed) 8743 return; 8744 8745 /* Store fan status in cache */ 8746 fan_control_resume_level = 0; 8747 rc = fan_get_status_safe(&fan_control_resume_level); 8748 if (rc < 0) 8749 pr_notice("failed to read fan level for later " 8750 "restore during resume: %d\n", rc); 8751 8752 /* if it is undefined, don't attempt to restore it. 8753 * KEEP THIS LAST */ 8754 if (tp_features.fan_ctrl_status_undef) 8755 fan_control_resume_level = 0; 8756 } 8757 8758 static void fan_resume(void) 8759 { 8760 u8 current_level = 7; 8761 bool do_set = false; 8762 int rc; 8763 8764 /* DSDT *always* updates status on resume */ 8765 tp_features.fan_ctrl_status_undef = 0; 8766 8767 if (!fan_control_allowed || 8768 !fan_control_resume_level || 8769 (fan_get_status_safe(¤t_level) < 0)) 8770 return; 8771 8772 switch (fan_control_access_mode) { 8773 case TPACPI_FAN_WR_ACPI_SFAN: 8774 /* never decrease fan level */ 8775 do_set = (fan_control_resume_level > current_level); 8776 break; 8777 case TPACPI_FAN_WR_ACPI_FANS: 8778 case TPACPI_FAN_WR_TPEC: 8779 /* never decrease fan level, scale is: 8780 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8781 * 8782 * We expect the firmware to set either 7 or AUTO, but we 8783 * handle FULLSPEED out of paranoia. 8784 * 8785 * So, we can safely only restore FULLSPEED or 7, anything 8786 * else could slow the fan. Restoring AUTO is useless, at 8787 * best that's exactly what the DSDT already set (it is the 8788 * slower it uses). 8789 * 8790 * Always keep in mind that the DSDT *will* have set the 8791 * fans to what the vendor supposes is the best level. We 8792 * muck with it only to speed the fan up. 8793 */ 8794 if (fan_control_resume_level != 7 && 8795 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8796 return; 8797 else 8798 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8799 (current_level != fan_control_resume_level); 8800 break; 8801 default: 8802 return; 8803 } 8804 if (do_set) { 8805 pr_notice("restoring fan level to 0x%02x\n", 8806 fan_control_resume_level); 8807 rc = fan_set_level_safe(fan_control_resume_level); 8808 if (rc < 0) 8809 pr_notice("failed to restore fan level: %d\n", rc); 8810 } 8811 } 8812 8813 static int fan_read(struct seq_file *m) 8814 { 8815 int rc; 8816 u8 status; 8817 unsigned int speed = 0; 8818 8819 switch (fan_status_access_mode) { 8820 case TPACPI_FAN_RD_ACPI_GFAN: 8821 /* 570, 600e/x, 770e, 770x */ 8822 rc = fan_get_status_safe(&status); 8823 if (rc < 0) 8824 return rc; 8825 8826 seq_printf(m, "status:\t\t%s\n" 8827 "level:\t\t%d\n", 8828 (status != 0) ? "enabled" : "disabled", status); 8829 break; 8830 8831 case TPACPI_FAN_RD_TPEC: 8832 /* all except 570, 600e/x, 770e, 770x */ 8833 rc = fan_get_status_safe(&status); 8834 if (rc < 0) 8835 return rc; 8836 8837 seq_printf(m, "status:\t\t%s\n", 8838 (status != 0) ? "enabled" : "disabled"); 8839 8840 rc = fan_get_speed(&speed); 8841 if (rc < 0) 8842 return rc; 8843 8844 seq_printf(m, "speed:\t\t%d\n", speed); 8845 8846 if (status & TP_EC_FAN_FULLSPEED) 8847 /* Disengaged mode takes precedence */ 8848 seq_printf(m, "level:\t\tdisengaged\n"); 8849 else if (status & TP_EC_FAN_AUTO) 8850 seq_printf(m, "level:\t\tauto\n"); 8851 else 8852 seq_printf(m, "level:\t\t%d\n", status); 8853 break; 8854 8855 case TPACPI_FAN_NONE: 8856 default: 8857 seq_printf(m, "status:\t\tnot supported\n"); 8858 } 8859 8860 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8861 seq_printf(m, "commands:\tlevel <level>"); 8862 8863 switch (fan_control_access_mode) { 8864 case TPACPI_FAN_WR_ACPI_SFAN: 8865 seq_printf(m, " (<level> is 0-7)\n"); 8866 break; 8867 8868 default: 8869 seq_printf(m, " (<level> is 0-7, " 8870 "auto, disengaged, full-speed)\n"); 8871 break; 8872 } 8873 } 8874 8875 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8876 seq_printf(m, "commands:\tenable, disable\n" 8877 "commands:\twatchdog <timeout> (<timeout> " 8878 "is 0 (off), 1-120 (seconds))\n"); 8879 8880 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8881 seq_printf(m, "commands:\tspeed <speed>" 8882 " (<speed> is 0-65535)\n"); 8883 8884 return 0; 8885 } 8886 8887 static int fan_write_cmd_level(const char *cmd, int *rc) 8888 { 8889 int level; 8890 8891 if (strlencmp(cmd, "level auto") == 0) 8892 level = TP_EC_FAN_AUTO; 8893 else if ((strlencmp(cmd, "level disengaged") == 0) | 8894 (strlencmp(cmd, "level full-speed") == 0)) 8895 level = TP_EC_FAN_FULLSPEED; 8896 else if (sscanf(cmd, "level %d", &level) != 1) 8897 return 0; 8898 8899 *rc = fan_set_level_safe(level); 8900 if (*rc == -ENXIO) 8901 pr_err("level command accepted for unsupported access mode %d\n", 8902 fan_control_access_mode); 8903 else if (!*rc) 8904 tpacpi_disclose_usertask("procfs fan", 8905 "set level to %d\n", level); 8906 8907 return 1; 8908 } 8909 8910 static int fan_write_cmd_enable(const char *cmd, int *rc) 8911 { 8912 if (strlencmp(cmd, "enable") != 0) 8913 return 0; 8914 8915 *rc = fan_set_enable(); 8916 if (*rc == -ENXIO) 8917 pr_err("enable command accepted for unsupported access mode %d\n", 8918 fan_control_access_mode); 8919 else if (!*rc) 8920 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8921 8922 return 1; 8923 } 8924 8925 static int fan_write_cmd_disable(const char *cmd, int *rc) 8926 { 8927 if (strlencmp(cmd, "disable") != 0) 8928 return 0; 8929 8930 *rc = fan_set_disable(); 8931 if (*rc == -ENXIO) 8932 pr_err("disable command accepted for unsupported access mode %d\n", 8933 fan_control_access_mode); 8934 else if (!*rc) 8935 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8936 8937 return 1; 8938 } 8939 8940 static int fan_write_cmd_speed(const char *cmd, int *rc) 8941 { 8942 int speed; 8943 8944 /* TODO: 8945 * Support speed <low> <medium> <high> ? */ 8946 8947 if (sscanf(cmd, "speed %d", &speed) != 1) 8948 return 0; 8949 8950 *rc = fan_set_speed(speed); 8951 if (*rc == -ENXIO) 8952 pr_err("speed command accepted for unsupported access mode %d\n", 8953 fan_control_access_mode); 8954 else if (!*rc) 8955 tpacpi_disclose_usertask("procfs fan", 8956 "set speed to %d\n", speed); 8957 8958 return 1; 8959 } 8960 8961 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8962 { 8963 int interval; 8964 8965 if (sscanf(cmd, "watchdog %d", &interval) != 1) 8966 return 0; 8967 8968 if (interval < 0 || interval > 120) 8969 *rc = -EINVAL; 8970 else { 8971 fan_watchdog_maxinterval = interval; 8972 tpacpi_disclose_usertask("procfs fan", 8973 "set watchdog timer to %d\n", 8974 interval); 8975 } 8976 8977 return 1; 8978 } 8979 8980 static int fan_write(char *buf) 8981 { 8982 char *cmd; 8983 int rc = 0; 8984 8985 while (!rc && (cmd = next_cmd(&buf))) { 8986 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 8987 fan_write_cmd_level(cmd, &rc)) && 8988 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 8989 (fan_write_cmd_enable(cmd, &rc) || 8990 fan_write_cmd_disable(cmd, &rc) || 8991 fan_write_cmd_watchdog(cmd, &rc))) && 8992 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 8993 fan_write_cmd_speed(cmd, &rc)) 8994 ) 8995 rc = -EINVAL; 8996 else if (!rc) 8997 fan_watchdog_reset(); 8998 } 8999 9000 return rc; 9001 } 9002 9003 static struct ibm_struct fan_driver_data = { 9004 .name = "fan", 9005 .read = fan_read, 9006 .write = fan_write, 9007 .exit = fan_exit, 9008 .suspend = fan_suspend, 9009 .resume = fan_resume, 9010 }; 9011 9012 /************************************************************************* 9013 * Mute LED subdriver 9014 */ 9015 9016 9017 struct tp_led_table { 9018 acpi_string name; 9019 int on_value; 9020 int off_value; 9021 int state; 9022 }; 9023 9024 static struct tp_led_table led_tables[] = { 9025 [TPACPI_LED_MUTE] = { 9026 .name = "SSMS", 9027 .on_value = 1, 9028 .off_value = 0, 9029 }, 9030 [TPACPI_LED_MICMUTE] = { 9031 .name = "MMTS", 9032 .on_value = 2, 9033 .off_value = 0, 9034 }, 9035 }; 9036 9037 static int mute_led_on_off(struct tp_led_table *t, bool state) 9038 { 9039 acpi_handle temp; 9040 int output; 9041 9042 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9043 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9044 return -EIO; 9045 } 9046 9047 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9048 state ? t->on_value : t->off_value)) 9049 return -EIO; 9050 9051 t->state = state; 9052 return state; 9053 } 9054 9055 int tpacpi_led_set(int whichled, bool on) 9056 { 9057 struct tp_led_table *t; 9058 9059 if (whichled < 0 || whichled >= TPACPI_LED_MAX) 9060 return -EINVAL; 9061 9062 t = &led_tables[whichled]; 9063 if (t->state < 0 || t->state == on) 9064 return t->state; 9065 return mute_led_on_off(t, on); 9066 } 9067 EXPORT_SYMBOL_GPL(tpacpi_led_set); 9068 9069 static int mute_led_init(struct ibm_init_struct *iibm) 9070 { 9071 acpi_handle temp; 9072 int i; 9073 9074 for (i = 0; i < TPACPI_LED_MAX; i++) { 9075 struct tp_led_table *t = &led_tables[i]; 9076 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) 9077 mute_led_on_off(t, false); 9078 else 9079 t->state = -ENODEV; 9080 } 9081 return 0; 9082 } 9083 9084 static void mute_led_exit(void) 9085 { 9086 int i; 9087 9088 for (i = 0; i < TPACPI_LED_MAX; i++) 9089 tpacpi_led_set(i, false); 9090 } 9091 9092 static void mute_led_resume(void) 9093 { 9094 int i; 9095 9096 for (i = 0; i < TPACPI_LED_MAX; i++) { 9097 struct tp_led_table *t = &led_tables[i]; 9098 if (t->state >= 0) 9099 mute_led_on_off(t, t->state); 9100 } 9101 } 9102 9103 static struct ibm_struct mute_led_driver_data = { 9104 .name = "mute_led", 9105 .exit = mute_led_exit, 9106 .resume = mute_led_resume, 9107 }; 9108 9109 /**************************************************************************** 9110 **************************************************************************** 9111 * 9112 * Infrastructure 9113 * 9114 **************************************************************************** 9115 ****************************************************************************/ 9116 9117 /* 9118 * HKEY event callout for other subdrivers go here 9119 * (yes, it is ugly, but it is quick, safe, and gets the job done 9120 */ 9121 static void tpacpi_driver_event(const unsigned int hkey_event) 9122 { 9123 if (ibm_backlight_device) { 9124 switch (hkey_event) { 9125 case TP_HKEY_EV_BRGHT_UP: 9126 case TP_HKEY_EV_BRGHT_DOWN: 9127 tpacpi_brightness_notify_change(); 9128 } 9129 } 9130 if (alsa_card) { 9131 switch (hkey_event) { 9132 case TP_HKEY_EV_VOL_UP: 9133 case TP_HKEY_EV_VOL_DOWN: 9134 case TP_HKEY_EV_VOL_MUTE: 9135 volume_alsa_notify_change(); 9136 } 9137 } 9138 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) { 9139 enum led_brightness brightness; 9140 9141 mutex_lock(&kbdlight_mutex); 9142 9143 /* 9144 * Check the brightness actually changed, setting the brightness 9145 * through kbdlight_set_level() also triggers this event. 9146 */ 9147 brightness = kbdlight_sysfs_get(NULL); 9148 if (kbdlight_brightness != brightness) { 9149 kbdlight_brightness = brightness; 9150 led_classdev_notify_brightness_hw_changed( 9151 &tpacpi_led_kbdlight.led_classdev, brightness); 9152 } 9153 9154 mutex_unlock(&kbdlight_mutex); 9155 } 9156 } 9157 9158 static void hotkey_driver_event(const unsigned int scancode) 9159 { 9160 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9161 } 9162 9163 /* sysfs name ---------------------------------------------------------- */ 9164 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 9165 struct device_attribute *attr, 9166 char *buf) 9167 { 9168 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 9169 } 9170 9171 static DEVICE_ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 9172 9173 /* --------------------------------------------------------------------- */ 9174 9175 /* /proc support */ 9176 static struct proc_dir_entry *proc_dir; 9177 9178 /* 9179 * Module and infrastructure proble, init and exit handling 9180 */ 9181 9182 static bool force_load; 9183 9184 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9185 static const char * __init str_supported(int is_supported) 9186 { 9187 static char text_unsupported[] __initdata = "not supported"; 9188 9189 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9190 } 9191 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9192 9193 static void ibm_exit(struct ibm_struct *ibm) 9194 { 9195 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9196 9197 list_del_init(&ibm->all_drivers); 9198 9199 if (ibm->flags.acpi_notify_installed) { 9200 dbg_printk(TPACPI_DBG_EXIT, 9201 "%s: acpi_remove_notify_handler\n", ibm->name); 9202 BUG_ON(!ibm->acpi); 9203 acpi_remove_notify_handler(*ibm->acpi->handle, 9204 ibm->acpi->type, 9205 dispatch_acpi_notify); 9206 ibm->flags.acpi_notify_installed = 0; 9207 } 9208 9209 if (ibm->flags.proc_created) { 9210 dbg_printk(TPACPI_DBG_EXIT, 9211 "%s: remove_proc_entry\n", ibm->name); 9212 remove_proc_entry(ibm->name, proc_dir); 9213 ibm->flags.proc_created = 0; 9214 } 9215 9216 if (ibm->flags.acpi_driver_registered) { 9217 dbg_printk(TPACPI_DBG_EXIT, 9218 "%s: acpi_bus_unregister_driver\n", ibm->name); 9219 BUG_ON(!ibm->acpi); 9220 acpi_bus_unregister_driver(ibm->acpi->driver); 9221 kfree(ibm->acpi->driver); 9222 ibm->acpi->driver = NULL; 9223 ibm->flags.acpi_driver_registered = 0; 9224 } 9225 9226 if (ibm->flags.init_called && ibm->exit) { 9227 ibm->exit(); 9228 ibm->flags.init_called = 0; 9229 } 9230 9231 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9232 } 9233 9234 static int __init ibm_init(struct ibm_init_struct *iibm) 9235 { 9236 int ret; 9237 struct ibm_struct *ibm = iibm->data; 9238 struct proc_dir_entry *entry; 9239 9240 BUG_ON(ibm == NULL); 9241 9242 INIT_LIST_HEAD(&ibm->all_drivers); 9243 9244 if (ibm->flags.experimental && !experimental) 9245 return 0; 9246 9247 dbg_printk(TPACPI_DBG_INIT, 9248 "probing for %s\n", ibm->name); 9249 9250 if (iibm->init) { 9251 ret = iibm->init(iibm); 9252 if (ret > 0) 9253 return 0; /* probe failed */ 9254 if (ret) 9255 return ret; 9256 9257 ibm->flags.init_called = 1; 9258 } 9259 9260 if (ibm->acpi) { 9261 if (ibm->acpi->hid) { 9262 ret = register_tpacpi_subdriver(ibm); 9263 if (ret) 9264 goto err_out; 9265 } 9266 9267 if (ibm->acpi->notify) { 9268 ret = setup_acpi_notify(ibm); 9269 if (ret == -ENODEV) { 9270 pr_notice("disabling subdriver %s\n", 9271 ibm->name); 9272 ret = 0; 9273 goto err_out; 9274 } 9275 if (ret < 0) 9276 goto err_out; 9277 } 9278 } 9279 9280 dbg_printk(TPACPI_DBG_INIT, 9281 "%s installed\n", ibm->name); 9282 9283 if (ibm->read) { 9284 umode_t mode = iibm->base_procfs_mode; 9285 9286 if (!mode) 9287 mode = S_IRUGO; 9288 if (ibm->write) 9289 mode |= S_IWUSR; 9290 entry = proc_create_data(ibm->name, mode, proc_dir, 9291 &dispatch_proc_fops, ibm); 9292 if (!entry) { 9293 pr_err("unable to create proc entry %s\n", ibm->name); 9294 ret = -ENODEV; 9295 goto err_out; 9296 } 9297 ibm->flags.proc_created = 1; 9298 } 9299 9300 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9301 9302 return 0; 9303 9304 err_out: 9305 dbg_printk(TPACPI_DBG_INIT, 9306 "%s: at error exit path with result %d\n", 9307 ibm->name, ret); 9308 9309 ibm_exit(ibm); 9310 return (ret < 0) ? ret : 0; 9311 } 9312 9313 /* Probing */ 9314 9315 static bool __pure __init tpacpi_is_fw_digit(const char c) 9316 { 9317 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 9318 } 9319 9320 static bool __pure __init tpacpi_is_valid_fw_id(const char * const s, 9321 const char t) 9322 { 9323 /* 9324 * Most models: xxyTkkWW (#.##c) 9325 * Ancient 570/600 and -SL lacks (#.##c) 9326 */ 9327 if (s && strlen(s) >= 8 && 9328 tpacpi_is_fw_digit(s[0]) && 9329 tpacpi_is_fw_digit(s[1]) && 9330 s[2] == t && 9331 (s[3] == 'T' || s[3] == 'N') && 9332 tpacpi_is_fw_digit(s[4]) && 9333 tpacpi_is_fw_digit(s[5])) 9334 return true; 9335 9336 /* New models: xxxyTkkW (#.##c); T550 and some others */ 9337 return s && strlen(s) >= 8 && 9338 tpacpi_is_fw_digit(s[0]) && 9339 tpacpi_is_fw_digit(s[1]) && 9340 tpacpi_is_fw_digit(s[2]) && 9341 s[3] == t && 9342 (s[4] == 'T' || s[4] == 'N') && 9343 tpacpi_is_fw_digit(s[5]) && 9344 tpacpi_is_fw_digit(s[6]); 9345 } 9346 9347 /* returns 0 - probe ok, or < 0 - probe error. 9348 * Probe ok doesn't mean thinkpad found. 9349 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 9350 static int __must_check __init get_thinkpad_model_data( 9351 struct thinkpad_id_data *tp) 9352 { 9353 const struct dmi_device *dev = NULL; 9354 char ec_fw_string[18]; 9355 char const *s; 9356 9357 if (!tp) 9358 return -EINVAL; 9359 9360 memset(tp, 0, sizeof(*tp)); 9361 9362 if (dmi_name_in_vendors("IBM")) 9363 tp->vendor = PCI_VENDOR_ID_IBM; 9364 else if (dmi_name_in_vendors("LENOVO")) 9365 tp->vendor = PCI_VENDOR_ID_LENOVO; 9366 else 9367 return 0; 9368 9369 s = dmi_get_system_info(DMI_BIOS_VERSION); 9370 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 9371 if (s && !tp->bios_version_str) 9372 return -ENOMEM; 9373 9374 /* Really ancient ThinkPad 240X will fail this, which is fine */ 9375 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') || 9376 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C'))) 9377 return 0; 9378 9379 tp->bios_model = tp->bios_version_str[0] 9380 | (tp->bios_version_str[1] << 8); 9381 tp->bios_release = (tp->bios_version_str[4] << 8) 9382 | tp->bios_version_str[5]; 9383 9384 /* 9385 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 9386 * X32 or newer, all Z series; Some models must have an 9387 * up-to-date BIOS or they will not be detected. 9388 * 9389 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9390 */ 9391 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 9392 if (sscanf(dev->name, 9393 "IBM ThinkPad Embedded Controller -[%17c", 9394 ec_fw_string) == 1) { 9395 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 9396 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 9397 9398 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 9399 if (!tp->ec_version_str) 9400 return -ENOMEM; 9401 9402 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 9403 tp->ec_model = ec_fw_string[0] 9404 | (ec_fw_string[1] << 8); 9405 tp->ec_release = (ec_fw_string[4] << 8) 9406 | ec_fw_string[5]; 9407 } else { 9408 pr_notice("ThinkPad firmware release %s " 9409 "doesn't match the known patterns\n", 9410 ec_fw_string); 9411 pr_notice("please report this to %s\n", 9412 TPACPI_MAIL); 9413 } 9414 break; 9415 } 9416 } 9417 9418 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 9419 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 9420 tp->model_str = kstrdup(s, GFP_KERNEL); 9421 if (!tp->model_str) 9422 return -ENOMEM; 9423 } else { 9424 s = dmi_get_system_info(DMI_BIOS_VENDOR); 9425 if (s && !(strncasecmp(s, "Lenovo", 6))) { 9426 tp->model_str = kstrdup(s, GFP_KERNEL); 9427 if (!tp->model_str) 9428 return -ENOMEM; 9429 } 9430 } 9431 9432 s = dmi_get_system_info(DMI_PRODUCT_NAME); 9433 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 9434 if (s && !tp->nummodel_str) 9435 return -ENOMEM; 9436 9437 return 0; 9438 } 9439 9440 static int __init probe_for_thinkpad(void) 9441 { 9442 int is_thinkpad; 9443 9444 if (acpi_disabled) 9445 return -ENODEV; 9446 9447 /* It would be dangerous to run the driver in this case */ 9448 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 9449 return -ENODEV; 9450 9451 /* 9452 * Non-ancient models have better DMI tagging, but very old models 9453 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 9454 */ 9455 is_thinkpad = (thinkpad_id.model_str != NULL) || 9456 (thinkpad_id.ec_model != 0) || 9457 tpacpi_is_fw_known(); 9458 9459 /* The EC handler is required */ 9460 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 9461 if (!ec_handle) { 9462 if (is_thinkpad) 9463 pr_err("Not yet supported ThinkPad detected!\n"); 9464 return -ENODEV; 9465 } 9466 9467 if (!is_thinkpad && !force_load) 9468 return -ENODEV; 9469 9470 return 0; 9471 } 9472 9473 static void __init thinkpad_acpi_init_banner(void) 9474 { 9475 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 9476 pr_info("%s\n", TPACPI_URL); 9477 9478 pr_info("ThinkPad BIOS %s, EC %s\n", 9479 (thinkpad_id.bios_version_str) ? 9480 thinkpad_id.bios_version_str : "unknown", 9481 (thinkpad_id.ec_version_str) ? 9482 thinkpad_id.ec_version_str : "unknown"); 9483 9484 BUG_ON(!thinkpad_id.vendor); 9485 9486 if (thinkpad_id.model_str) 9487 pr_info("%s %s, model %s\n", 9488 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 9489 "IBM" : ((thinkpad_id.vendor == 9490 PCI_VENDOR_ID_LENOVO) ? 9491 "Lenovo" : "Unknown vendor"), 9492 thinkpad_id.model_str, 9493 (thinkpad_id.nummodel_str) ? 9494 thinkpad_id.nummodel_str : "unknown"); 9495 } 9496 9497 /* Module init, exit, parameters */ 9498 9499 static struct ibm_init_struct ibms_init[] __initdata = { 9500 { 9501 .data = &thinkpad_acpi_driver_data, 9502 }, 9503 { 9504 .init = hotkey_init, 9505 .data = &hotkey_driver_data, 9506 }, 9507 { 9508 .init = bluetooth_init, 9509 .data = &bluetooth_driver_data, 9510 }, 9511 { 9512 .init = wan_init, 9513 .data = &wan_driver_data, 9514 }, 9515 { 9516 .init = uwb_init, 9517 .data = &uwb_driver_data, 9518 }, 9519 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 9520 { 9521 .init = video_init, 9522 .base_procfs_mode = S_IRUSR, 9523 .data = &video_driver_data, 9524 }, 9525 #endif 9526 { 9527 .init = kbdlight_init, 9528 .data = &kbdlight_driver_data, 9529 }, 9530 { 9531 .init = light_init, 9532 .data = &light_driver_data, 9533 }, 9534 { 9535 .init = cmos_init, 9536 .data = &cmos_driver_data, 9537 }, 9538 { 9539 .init = led_init, 9540 .data = &led_driver_data, 9541 }, 9542 { 9543 .init = beep_init, 9544 .data = &beep_driver_data, 9545 }, 9546 { 9547 .init = thermal_init, 9548 .data = &thermal_driver_data, 9549 }, 9550 { 9551 .init = brightness_init, 9552 .data = &brightness_driver_data, 9553 }, 9554 { 9555 .init = volume_init, 9556 .data = &volume_driver_data, 9557 }, 9558 { 9559 .init = fan_init, 9560 .data = &fan_driver_data, 9561 }, 9562 { 9563 .init = mute_led_init, 9564 .data = &mute_led_driver_data, 9565 }, 9566 }; 9567 9568 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 9569 { 9570 unsigned int i; 9571 struct ibm_struct *ibm; 9572 9573 if (!kp || !kp->name || !val) 9574 return -EINVAL; 9575 9576 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9577 ibm = ibms_init[i].data; 9578 WARN_ON(ibm == NULL); 9579 9580 if (!ibm || !ibm->name) 9581 continue; 9582 9583 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 9584 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 9585 return -ENOSPC; 9586 strcpy(ibms_init[i].param, val); 9587 strcat(ibms_init[i].param, ","); 9588 return 0; 9589 } 9590 } 9591 9592 return -EINVAL; 9593 } 9594 9595 module_param(experimental, int, 0444); 9596 MODULE_PARM_DESC(experimental, 9597 "Enables experimental features when non-zero"); 9598 9599 module_param_named(debug, dbg_level, uint, 0); 9600 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 9601 9602 module_param(force_load, bool, 0444); 9603 MODULE_PARM_DESC(force_load, 9604 "Attempts to load the driver even on a " 9605 "mis-identified ThinkPad when true"); 9606 9607 module_param_named(fan_control, fan_control_allowed, bool, 0444); 9608 MODULE_PARM_DESC(fan_control, 9609 "Enables setting fan parameters features when true"); 9610 9611 module_param_named(brightness_mode, brightness_mode, uint, 0444); 9612 MODULE_PARM_DESC(brightness_mode, 9613 "Selects brightness control strategy: " 9614 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 9615 9616 module_param(brightness_enable, uint, 0444); 9617 MODULE_PARM_DESC(brightness_enable, 9618 "Enables backlight control when 1, disables when 0"); 9619 9620 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 9621 module_param_named(volume_mode, volume_mode, uint, 0444); 9622 MODULE_PARM_DESC(volume_mode, 9623 "Selects volume control strategy: " 9624 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 9625 9626 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 9627 MODULE_PARM_DESC(volume_capabilities, 9628 "Selects the mixer capabilites: " 9629 "0=auto, 1=volume and mute, 2=mute only"); 9630 9631 module_param_named(volume_control, volume_control_allowed, bool, 0444); 9632 MODULE_PARM_DESC(volume_control, 9633 "Enables software override for the console audio " 9634 "control when true"); 9635 9636 module_param_named(software_mute, software_mute_requested, bool, 0444); 9637 MODULE_PARM_DESC(software_mute, 9638 "Request full software mute control"); 9639 9640 /* ALSA module API parameters */ 9641 module_param_named(index, alsa_index, int, 0444); 9642 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 9643 module_param_named(id, alsa_id, charp, 0444); 9644 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 9645 module_param_named(enable, alsa_enable, bool, 0444); 9646 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 9647 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 9648 9649 #define TPACPI_PARAM(feature) \ 9650 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 9651 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 9652 "at module load, see documentation") 9653 9654 TPACPI_PARAM(hotkey); 9655 TPACPI_PARAM(bluetooth); 9656 TPACPI_PARAM(video); 9657 TPACPI_PARAM(light); 9658 TPACPI_PARAM(cmos); 9659 TPACPI_PARAM(led); 9660 TPACPI_PARAM(beep); 9661 TPACPI_PARAM(brightness); 9662 TPACPI_PARAM(volume); 9663 TPACPI_PARAM(fan); 9664 9665 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 9666 module_param(dbg_wlswemul, uint, 0444); 9667 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 9668 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 9669 MODULE_PARM_DESC(wlsw_state, 9670 "Initial state of the emulated WLSW switch"); 9671 9672 module_param(dbg_bluetoothemul, uint, 0444); 9673 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 9674 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 9675 MODULE_PARM_DESC(bluetooth_state, 9676 "Initial state of the emulated bluetooth switch"); 9677 9678 module_param(dbg_wwanemul, uint, 0444); 9679 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 9680 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 9681 MODULE_PARM_DESC(wwan_state, 9682 "Initial state of the emulated WWAN switch"); 9683 9684 module_param(dbg_uwbemul, uint, 0444); 9685 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 9686 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 9687 MODULE_PARM_DESC(uwb_state, 9688 "Initial state of the emulated UWB switch"); 9689 #endif 9690 9691 static void thinkpad_acpi_module_exit(void) 9692 { 9693 struct ibm_struct *ibm, *itmp; 9694 9695 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 9696 9697 list_for_each_entry_safe_reverse(ibm, itmp, 9698 &tpacpi_all_drivers, 9699 all_drivers) { 9700 ibm_exit(ibm); 9701 } 9702 9703 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 9704 9705 if (tpacpi_inputdev) { 9706 if (tp_features.input_device_registered) 9707 input_unregister_device(tpacpi_inputdev); 9708 else 9709 input_free_device(tpacpi_inputdev); 9710 kfree(hotkey_keycode_map); 9711 } 9712 9713 if (tpacpi_hwmon) 9714 hwmon_device_unregister(tpacpi_hwmon); 9715 9716 if (tp_features.sensors_pdev_attrs_registered) 9717 device_remove_file(&tpacpi_sensors_pdev->dev, &dev_attr_name); 9718 if (tpacpi_sensors_pdev) 9719 platform_device_unregister(tpacpi_sensors_pdev); 9720 if (tpacpi_pdev) 9721 platform_device_unregister(tpacpi_pdev); 9722 9723 if (tp_features.sensors_pdrv_attrs_registered) 9724 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 9725 if (tp_features.platform_drv_attrs_registered) 9726 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 9727 9728 if (tp_features.sensors_pdrv_registered) 9729 platform_driver_unregister(&tpacpi_hwmon_pdriver); 9730 9731 if (tp_features.platform_drv_registered) 9732 platform_driver_unregister(&tpacpi_pdriver); 9733 9734 if (proc_dir) 9735 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 9736 9737 if (tpacpi_wq) 9738 destroy_workqueue(tpacpi_wq); 9739 9740 kfree(thinkpad_id.bios_version_str); 9741 kfree(thinkpad_id.ec_version_str); 9742 kfree(thinkpad_id.model_str); 9743 kfree(thinkpad_id.nummodel_str); 9744 } 9745 9746 9747 static int __init thinkpad_acpi_module_init(void) 9748 { 9749 int ret, i; 9750 9751 tpacpi_lifecycle = TPACPI_LIFE_INIT; 9752 9753 /* Driver-level probe */ 9754 9755 ret = get_thinkpad_model_data(&thinkpad_id); 9756 if (ret) { 9757 pr_err("unable to get DMI data: %d\n", ret); 9758 thinkpad_acpi_module_exit(); 9759 return ret; 9760 } 9761 ret = probe_for_thinkpad(); 9762 if (ret) { 9763 thinkpad_acpi_module_exit(); 9764 return ret; 9765 } 9766 9767 /* Driver initialization */ 9768 9769 thinkpad_acpi_init_banner(); 9770 tpacpi_check_outdated_fw(); 9771 9772 TPACPI_ACPIHANDLE_INIT(ecrd); 9773 TPACPI_ACPIHANDLE_INIT(ecwr); 9774 9775 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 9776 if (!tpacpi_wq) { 9777 thinkpad_acpi_module_exit(); 9778 return -ENOMEM; 9779 } 9780 9781 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 9782 if (!proc_dir) { 9783 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 9784 thinkpad_acpi_module_exit(); 9785 return -ENODEV; 9786 } 9787 9788 ret = platform_driver_register(&tpacpi_pdriver); 9789 if (ret) { 9790 pr_err("unable to register main platform driver\n"); 9791 thinkpad_acpi_module_exit(); 9792 return ret; 9793 } 9794 tp_features.platform_drv_registered = 1; 9795 9796 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 9797 if (ret) { 9798 pr_err("unable to register hwmon platform driver\n"); 9799 thinkpad_acpi_module_exit(); 9800 return ret; 9801 } 9802 tp_features.sensors_pdrv_registered = 1; 9803 9804 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 9805 if (!ret) { 9806 tp_features.platform_drv_attrs_registered = 1; 9807 ret = tpacpi_create_driver_attributes( 9808 &tpacpi_hwmon_pdriver.driver); 9809 } 9810 if (ret) { 9811 pr_err("unable to create sysfs driver attributes\n"); 9812 thinkpad_acpi_module_exit(); 9813 return ret; 9814 } 9815 tp_features.sensors_pdrv_attrs_registered = 1; 9816 9817 9818 /* Device initialization */ 9819 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9820 NULL, 0); 9821 if (IS_ERR(tpacpi_pdev)) { 9822 ret = PTR_ERR(tpacpi_pdev); 9823 tpacpi_pdev = NULL; 9824 pr_err("unable to register platform device\n"); 9825 thinkpad_acpi_module_exit(); 9826 return ret; 9827 } 9828 tpacpi_sensors_pdev = platform_device_register_simple( 9829 TPACPI_HWMON_DRVR_NAME, 9830 -1, NULL, 0); 9831 if (IS_ERR(tpacpi_sensors_pdev)) { 9832 ret = PTR_ERR(tpacpi_sensors_pdev); 9833 tpacpi_sensors_pdev = NULL; 9834 pr_err("unable to register hwmon platform device\n"); 9835 thinkpad_acpi_module_exit(); 9836 return ret; 9837 } 9838 ret = device_create_file(&tpacpi_sensors_pdev->dev, &dev_attr_name); 9839 if (ret) { 9840 pr_err("unable to create sysfs hwmon device attributes\n"); 9841 thinkpad_acpi_module_exit(); 9842 return ret; 9843 } 9844 tp_features.sensors_pdev_attrs_registered = 1; 9845 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9846 if (IS_ERR(tpacpi_hwmon)) { 9847 ret = PTR_ERR(tpacpi_hwmon); 9848 tpacpi_hwmon = NULL; 9849 pr_err("unable to register hwmon device\n"); 9850 thinkpad_acpi_module_exit(); 9851 return ret; 9852 } 9853 mutex_init(&tpacpi_inputdev_send_mutex); 9854 tpacpi_inputdev = input_allocate_device(); 9855 if (!tpacpi_inputdev) { 9856 thinkpad_acpi_module_exit(); 9857 return -ENOMEM; 9858 } else { 9859 /* Prepare input device, but don't register */ 9860 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9861 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9862 tpacpi_inputdev->id.bustype = BUS_HOST; 9863 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9864 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9865 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9866 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9867 } 9868 9869 /* Init subdriver dependencies */ 9870 tpacpi_detect_brightness_capabilities(); 9871 9872 /* Init subdrivers */ 9873 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9874 ret = ibm_init(&ibms_init[i]); 9875 if (ret >= 0 && *ibms_init[i].param) 9876 ret = ibms_init[i].data->write(ibms_init[i].param); 9877 if (ret < 0) { 9878 thinkpad_acpi_module_exit(); 9879 return ret; 9880 } 9881 } 9882 9883 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9884 9885 ret = input_register_device(tpacpi_inputdev); 9886 if (ret < 0) { 9887 pr_err("unable to register input device\n"); 9888 thinkpad_acpi_module_exit(); 9889 return ret; 9890 } else { 9891 tp_features.input_device_registered = 1; 9892 } 9893 9894 return 0; 9895 } 9896 9897 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9898 9899 /* 9900 * This will autoload the driver in almost every ThinkPad 9901 * in widespread use. 9902 * 9903 * Only _VERY_ old models, like the 240, 240x and 570 lack 9904 * the HKEY event interface. 9905 */ 9906 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9907 9908 /* 9909 * DMI matching for module autoloading 9910 * 9911 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9912 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9913 * 9914 * Only models listed in thinkwiki will be supported, so add yours 9915 * if it is not there yet. 9916 */ 9917 #define IBM_BIOS_MODULE_ALIAS(__type) \ 9918 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9919 9920 /* Ancient thinkpad BIOSes have to be identified by 9921 * BIOS type or model number, and there are far less 9922 * BIOS types than model numbers... */ 9923 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9924 9925 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9926 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9927 MODULE_DESCRIPTION(TPACPI_DESC); 9928 MODULE_VERSION(TPACPI_VERSION); 9929 MODULE_LICENSE("GPL"); 9930 9931 module_init(thinkpad_acpi_module_init); 9932 module_exit(thinkpad_acpi_module_exit); 9933