1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * thinkpad_acpi.c - ThinkPad ACPI Extras 4 * 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net> 6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br> 7 */ 8 9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 10 11 #define TPACPI_VERSION "0.26" 12 #define TPACPI_SYSFS_VERSION 0x030000 13 14 /* 15 * Changelog: 16 * 2007-10-20 changelog trimmed down 17 * 18 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 19 * drivers/misc. 20 * 21 * 2006-11-22 0.13 new maintainer 22 * changelog now lives in git commit history, and will 23 * not be updated further in-file. 24 * 25 * 2005-03-17 0.11 support for 600e, 770x 26 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 27 * 28 * 2005-01-16 0.9 use MODULE_VERSION 29 * thanks to Henrik Brix Andersen <brix@gentoo.org> 30 * fix parameter passing on module loading 31 * thanks to Rusty Russell <rusty@rustcorp.com.au> 32 * thanks to Jim Radford <radford@blackbean.org> 33 * 2004-11-08 0.8 fix init error case, don't return from a macro 34 * thanks to Chris Wright <chrisw@osdl.org> 35 */ 36 37 #include <linux/acpi.h> 38 #include <linux/backlight.h> 39 #include <linux/bitops.h> 40 #include <linux/delay.h> 41 #include <linux/dmi.h> 42 #include <linux/fb.h> 43 #include <linux/freezer.h> 44 #include <linux/hwmon.h> 45 #include <linux/hwmon-sysfs.h> 46 #include <linux/init.h> 47 #include <linux/input.h> 48 #include <linux/jiffies.h> 49 #include <linux/kernel.h> 50 #include <linux/kthread.h> 51 #include <linux/leds.h> 52 #include <linux/list.h> 53 #include <linux/lockdep.h> 54 #include <linux/module.h> 55 #include <linux/mutex.h> 56 #include <linux/nvram.h> 57 #include <linux/pci.h> 58 #include <linux/platform_device.h> 59 #include <linux/platform_profile.h> 60 #include <linux/power_supply.h> 61 #include <linux/proc_fs.h> 62 #include <linux/rfkill.h> 63 #include <linux/sched.h> 64 #include <linux/sched/signal.h> 65 #include <linux/seq_file.h> 66 #include <linux/slab.h> 67 #include <linux/string.h> 68 #include <linux/string_helpers.h> 69 #include <linux/sysfs.h> 70 #include <linux/types.h> 71 #include <linux/uaccess.h> 72 #include <linux/workqueue.h> 73 74 #include <acpi/battery.h> 75 #include <acpi/video.h> 76 77 #include <drm/drm_privacy_screen_driver.h> 78 79 #include <sound/control.h> 80 #include <sound/core.h> 81 #include <sound/initval.h> 82 83 #include "dual_accel_detect.h" 84 85 /* ThinkPad CMOS commands */ 86 #define TP_CMOS_VOLUME_DOWN 0 87 #define TP_CMOS_VOLUME_UP 1 88 #define TP_CMOS_VOLUME_MUTE 2 89 #define TP_CMOS_BRIGHTNESS_UP 4 90 #define TP_CMOS_BRIGHTNESS_DOWN 5 91 #define TP_CMOS_THINKLIGHT_ON 12 92 #define TP_CMOS_THINKLIGHT_OFF 13 93 94 /* NVRAM Addresses */ 95 enum tp_nvram_addr { 96 TP_NVRAM_ADDR_HK2 = 0x57, 97 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 98 TP_NVRAM_ADDR_VIDEO = 0x59, 99 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 100 TP_NVRAM_ADDR_MIXER = 0x60, 101 }; 102 103 /* NVRAM bit masks */ 104 enum { 105 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 106 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 107 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 108 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 109 TP_NVRAM_MASK_THINKLIGHT = 0x10, 110 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 111 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 112 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 113 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 114 TP_NVRAM_MASK_MUTE = 0x40, 115 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 116 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 117 TP_NVRAM_POS_LEVEL_VOLUME = 0, 118 }; 119 120 /* Misc NVRAM-related */ 121 enum { 122 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 123 }; 124 125 /* ACPI HIDs */ 126 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 127 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 128 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID "LEN0268" 129 #define TPACPI_ACPI_EC_HID "PNP0C09" 130 131 /* Input IDs */ 132 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 133 #define TPACPI_HKEY_INPUT_VERSION 0x4101 134 135 /* ACPI \WGSV commands */ 136 enum { 137 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 138 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 139 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 140 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 141 }; 142 143 /* TP_ACPI_WGSV_GET_STATE bits */ 144 enum { 145 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 146 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 147 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 148 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 149 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 150 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 151 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 152 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 153 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 154 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 155 }; 156 157 /* HKEY events */ 158 enum tpacpi_hkey_event_t { 159 /* Hotkey-related */ 160 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 161 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 162 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 163 TP_HKEY_EV_KBD_LIGHT = 0x1012, /* Thinklight/kbd backlight */ 164 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 165 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 166 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 167 TP_HKEY_EV_PRIVACYGUARD_TOGGLE = 0x130f, /* Toggle priv.guard on/off */ 168 TP_HKEY_EV_AMT_TOGGLE = 0x131a, /* Toggle AMT on/off */ 169 170 /* Reasons for waking up from S3/S4 */ 171 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 172 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 173 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 174 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 175 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 176 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 177 178 /* Auto-sleep after eject request */ 179 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 180 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 181 182 /* Misc bay events */ 183 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 184 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 185 or port replicator */ 186 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 187 dock or port replicator */ 188 /* 189 * Thinkpad X1 Tablet series devices emit 0x4012 and 0x4013 190 * when keyboard cover is attached, detached or folded onto the back 191 */ 192 TP_HKEY_EV_KBD_COVER_ATTACH = 0x4012, /* keyboard cover attached */ 193 TP_HKEY_EV_KBD_COVER_DETACH = 0x4013, /* keyboard cover detached or folded back */ 194 195 /* User-interface events */ 196 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 197 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 198 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 199 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 200 TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016): 201 * enter/leave tablet mode 202 */ 203 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 204 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 205 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 206 207 /* Key-related user-interface events */ 208 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 209 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 210 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */ 211 212 /* Thermal events */ 213 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 214 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 215 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 216 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 217 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* windows; thermal table changed */ 218 TP_HKEY_EV_THM_CSM_COMPLETED = 0x6032, /* windows; thermal control set 219 * command completed. Related to 220 * AML DYTC */ 221 TP_HKEY_EV_THM_TRANSFM_CHANGED = 0x60F0, /* windows; thermal transformation 222 * changed. Related to AML GMTS */ 223 224 /* AC-related events */ 225 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 226 227 /* Further user-interface events */ 228 TP_HKEY_EV_PALM_DETECTED = 0x60b0, /* palm hoveres keyboard */ 229 TP_HKEY_EV_PALM_UNDETECTED = 0x60b1, /* palm removed */ 230 231 /* Misc */ 232 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 233 }; 234 235 /**************************************************************************** 236 * Main driver 237 */ 238 239 #define TPACPI_NAME "thinkpad" 240 #define TPACPI_DESC "ThinkPad ACPI Extras" 241 #define TPACPI_FILE TPACPI_NAME "_acpi" 242 #define TPACPI_URL "http://ibm-acpi.sf.net/" 243 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 244 245 #define TPACPI_PROC_DIR "ibm" 246 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 247 #define TPACPI_DRVR_NAME TPACPI_FILE 248 #define TPACPI_DRVR_SHORTNAME "tpacpi" 249 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 250 251 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 252 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 253 254 #define TPACPI_MAX_ACPI_ARGS 3 255 256 /* Debugging printk groups */ 257 #define TPACPI_DBG_ALL 0xffff 258 #define TPACPI_DBG_DISCLOSETASK 0x8000 259 #define TPACPI_DBG_INIT 0x0001 260 #define TPACPI_DBG_EXIT 0x0002 261 #define TPACPI_DBG_RFKILL 0x0004 262 #define TPACPI_DBG_HKEY 0x0008 263 #define TPACPI_DBG_FAN 0x0010 264 #define TPACPI_DBG_BRGHT 0x0020 265 #define TPACPI_DBG_MIXER 0x0040 266 267 #define FAN_NOT_PRESENT 65535 268 269 /**************************************************************************** 270 * Driver-wide structs and misc. variables 271 */ 272 273 struct ibm_struct; 274 275 struct tp_acpi_drv_struct { 276 const struct acpi_device_id *hid; 277 struct acpi_driver *driver; 278 279 void (*notify) (struct ibm_struct *, u32); 280 acpi_handle *handle; 281 u32 type; 282 struct acpi_device *device; 283 }; 284 285 struct ibm_struct { 286 char *name; 287 288 int (*read) (struct seq_file *); 289 int (*write) (char *); 290 void (*exit) (void); 291 void (*resume) (void); 292 void (*suspend) (void); 293 void (*shutdown) (void); 294 295 struct list_head all_drivers; 296 297 struct tp_acpi_drv_struct *acpi; 298 299 struct { 300 u8 acpi_driver_registered:1; 301 u8 acpi_notify_installed:1; 302 u8 proc_created:1; 303 u8 init_called:1; 304 u8 experimental:1; 305 } flags; 306 }; 307 308 struct ibm_init_struct { 309 char param[32]; 310 311 int (*init) (struct ibm_init_struct *); 312 umode_t base_procfs_mode; 313 struct ibm_struct *data; 314 }; 315 316 /* DMI Quirks */ 317 struct quirk_entry { 318 bool btusb_bug; 319 }; 320 321 static struct quirk_entry quirk_btusb_bug = { 322 .btusb_bug = true, 323 }; 324 325 static struct { 326 u32 bluetooth:1; 327 u32 hotkey:1; 328 u32 hotkey_mask:1; 329 u32 hotkey_wlsw:1; 330 enum { 331 TP_HOTKEY_TABLET_NONE = 0, 332 TP_HOTKEY_TABLET_USES_MHKG, 333 TP_HOTKEY_TABLET_USES_GMMS, 334 } hotkey_tablet; 335 u32 kbdlight:1; 336 u32 light:1; 337 u32 light_status:1; 338 u32 bright_acpimode:1; 339 u32 bright_unkfw:1; 340 u32 wan:1; 341 u32 uwb:1; 342 u32 fan_ctrl_status_undef:1; 343 u32 second_fan:1; 344 u32 second_fan_ctl:1; 345 u32 beep_needs_two_args:1; 346 u32 mixer_no_level_control:1; 347 u32 battery_force_primary:1; 348 u32 input_device_registered:1; 349 u32 platform_drv_registered:1; 350 u32 sensors_pdrv_registered:1; 351 u32 hotkey_poll_active:1; 352 u32 has_adaptive_kbd:1; 353 u32 kbd_lang:1; 354 struct quirk_entry *quirks; 355 } tp_features; 356 357 static struct { 358 u16 hotkey_mask_ff:1; 359 u16 volume_ctrl_forbidden:1; 360 } tp_warned; 361 362 struct thinkpad_id_data { 363 unsigned int vendor; /* ThinkPad vendor: 364 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 365 366 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 367 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 368 369 u32 bios_model; /* 1Y = 0x3159, 0 = unknown */ 370 u32 ec_model; 371 u16 bios_release; /* 1ZETK1WW = 0x4b31, 0 = unknown */ 372 u16 ec_release; 373 374 char *model_str; /* ThinkPad T43 */ 375 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 376 }; 377 static struct thinkpad_id_data thinkpad_id; 378 379 static enum { 380 TPACPI_LIFE_INIT = 0, 381 TPACPI_LIFE_RUNNING, 382 TPACPI_LIFE_EXITING, 383 } tpacpi_lifecycle; 384 385 static int experimental; 386 static u32 dbg_level; 387 388 static struct workqueue_struct *tpacpi_wq; 389 390 enum led_status_t { 391 TPACPI_LED_OFF = 0, 392 TPACPI_LED_ON, 393 TPACPI_LED_BLINK, 394 }; 395 396 /* tpacpi LED class */ 397 struct tpacpi_led_classdev { 398 struct led_classdev led_classdev; 399 int led; 400 }; 401 402 /* brightness level capabilities */ 403 static unsigned int bright_maxlvl; /* 0 = unknown */ 404 405 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 406 static int dbg_wlswemul; 407 static bool tpacpi_wlsw_emulstate; 408 static int dbg_bluetoothemul; 409 static bool tpacpi_bluetooth_emulstate; 410 static int dbg_wwanemul; 411 static bool tpacpi_wwan_emulstate; 412 static int dbg_uwbemul; 413 static bool tpacpi_uwb_emulstate; 414 #endif 415 416 417 /************************************************************************* 418 * Debugging helpers 419 */ 420 421 #define dbg_printk(a_dbg_level, format, arg...) \ 422 do { \ 423 if (dbg_level & (a_dbg_level)) \ 424 printk(KERN_DEBUG pr_fmt("%s: " format), \ 425 __func__, ##arg); \ 426 } while (0) 427 428 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 429 #define vdbg_printk dbg_printk 430 static const char *str_supported(int is_supported); 431 #else 432 static inline const char *str_supported(int is_supported) { return ""; } 433 #define vdbg_printk(a_dbg_level, format, arg...) \ 434 do { if (0) no_printk(format, ##arg); } while (0) 435 #endif 436 437 static void tpacpi_log_usertask(const char * const what) 438 { 439 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 440 what, task_tgid_vnr(current)); 441 } 442 443 #define tpacpi_disclose_usertask(what, format, arg...) \ 444 do { \ 445 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 446 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 447 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 448 what, task_tgid_vnr(current), ## arg); \ 449 } \ 450 } while (0) 451 452 /* 453 * Quirk handling helpers 454 * 455 * ThinkPad IDs and versions seen in the field so far are 456 * two or three characters from the set [0-9A-Z], i.e. base 36. 457 * 458 * We use values well outside that range as specials. 459 */ 460 461 #define TPACPI_MATCH_ANY 0xffffffffU 462 #define TPACPI_MATCH_ANY_VERSION 0xffffU 463 #define TPACPI_MATCH_UNKNOWN 0U 464 465 /* TPID('1', 'Y') == 0x3159 */ 466 #define TPID(__c1, __c2) (((__c1) << 8) | (__c2)) 467 #define TPID3(__c1, __c2, __c3) (((__c1) << 16) | ((__c2) << 8) | (__c3)) 468 #define TPVER TPID 469 470 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 471 { .vendor = PCI_VENDOR_ID_IBM, \ 472 .bios = TPID(__id1, __id2), \ 473 .ec = TPACPI_MATCH_ANY, \ 474 .quirks = (__quirk) } 475 476 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 477 { .vendor = PCI_VENDOR_ID_LENOVO, \ 478 .bios = TPID(__id1, __id2), \ 479 .ec = TPACPI_MATCH_ANY, \ 480 .quirks = (__quirk) } 481 482 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \ 483 { .vendor = PCI_VENDOR_ID_LENOVO, \ 484 .bios = TPID3(__id1, __id2, __id3), \ 485 .ec = TPACPI_MATCH_ANY, \ 486 .quirks = (__quirk) } 487 488 #define TPACPI_QEC_IBM(__id1, __id2, __quirk) \ 489 { .vendor = PCI_VENDOR_ID_IBM, \ 490 .bios = TPACPI_MATCH_ANY, \ 491 .ec = TPID(__id1, __id2), \ 492 .quirks = (__quirk) } 493 494 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 495 { .vendor = PCI_VENDOR_ID_LENOVO, \ 496 .bios = TPACPI_MATCH_ANY, \ 497 .ec = TPID(__id1, __id2), \ 498 .quirks = (__quirk) } 499 500 struct tpacpi_quirk { 501 unsigned int vendor; 502 u32 bios; 503 u32 ec; 504 unsigned long quirks; 505 }; 506 507 /** 508 * tpacpi_check_quirks() - search BIOS/EC version on a list 509 * @qlist: array of &struct tpacpi_quirk 510 * @qlist_size: number of elements in @qlist 511 * 512 * Iterates over a quirks list until one is found that matches the 513 * ThinkPad's vendor, BIOS and EC model. 514 * 515 * Returns 0 if nothing matches, otherwise returns the quirks field of 516 * the matching &struct tpacpi_quirk entry. 517 * 518 * The match criteria is: vendor, ec and bios much match. 519 */ 520 static unsigned long __init tpacpi_check_quirks( 521 const struct tpacpi_quirk *qlist, 522 unsigned int qlist_size) 523 { 524 while (qlist_size) { 525 if ((qlist->vendor == thinkpad_id.vendor || 526 qlist->vendor == TPACPI_MATCH_ANY) && 527 (qlist->bios == thinkpad_id.bios_model || 528 qlist->bios == TPACPI_MATCH_ANY) && 529 (qlist->ec == thinkpad_id.ec_model || 530 qlist->ec == TPACPI_MATCH_ANY)) 531 return qlist->quirks; 532 533 qlist_size--; 534 qlist++; 535 } 536 return 0; 537 } 538 539 static inline bool __pure __init tpacpi_is_lenovo(void) 540 { 541 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 542 } 543 544 static inline bool __pure __init tpacpi_is_ibm(void) 545 { 546 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 547 } 548 549 /**************************************************************************** 550 **************************************************************************** 551 * 552 * ACPI Helpers and device model 553 * 554 **************************************************************************** 555 ****************************************************************************/ 556 557 /************************************************************************* 558 * ACPI basic handles 559 */ 560 561 static acpi_handle root_handle; 562 static acpi_handle ec_handle; 563 564 #define TPACPI_HANDLE(object, parent, paths...) \ 565 static acpi_handle object##_handle; \ 566 static const acpi_handle * const object##_parent __initconst = \ 567 &parent##_handle; \ 568 static char *object##_paths[] __initdata = { paths } 569 570 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 571 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 572 573 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 574 /* T4x, X31, X40 */ 575 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 576 "\\CMS", /* R40, R40e */ 577 ); /* all others */ 578 579 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 580 "^HKEY", /* R30, R31 */ 581 "HKEY", /* all others */ 582 ); /* 570 */ 583 584 /************************************************************************* 585 * ACPI helpers 586 */ 587 588 static int acpi_evalf(acpi_handle handle, 589 int *res, char *method, char *fmt, ...) 590 { 591 char *fmt0 = fmt; 592 struct acpi_object_list params; 593 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 594 struct acpi_buffer result, *resultp; 595 union acpi_object out_obj; 596 acpi_status status; 597 va_list ap; 598 char res_type; 599 int success; 600 int quiet; 601 602 if (!*fmt) { 603 pr_err("acpi_evalf() called with empty format\n"); 604 return 0; 605 } 606 607 if (*fmt == 'q') { 608 quiet = 1; 609 fmt++; 610 } else 611 quiet = 0; 612 613 res_type = *(fmt++); 614 615 params.count = 0; 616 params.pointer = &in_objs[0]; 617 618 va_start(ap, fmt); 619 while (*fmt) { 620 char c = *(fmt++); 621 switch (c) { 622 case 'd': /* int */ 623 in_objs[params.count].integer.value = va_arg(ap, int); 624 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 625 break; 626 /* add more types as needed */ 627 default: 628 pr_err("acpi_evalf() called with invalid format character '%c'\n", 629 c); 630 va_end(ap); 631 return 0; 632 } 633 } 634 va_end(ap); 635 636 if (res_type != 'v') { 637 result.length = sizeof(out_obj); 638 result.pointer = &out_obj; 639 resultp = &result; 640 } else 641 resultp = NULL; 642 643 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 644 645 switch (res_type) { 646 case 'd': /* int */ 647 success = (status == AE_OK && 648 out_obj.type == ACPI_TYPE_INTEGER); 649 if (success && res) 650 *res = out_obj.integer.value; 651 break; 652 case 'v': /* void */ 653 success = status == AE_OK; 654 break; 655 /* add more types as needed */ 656 default: 657 pr_err("acpi_evalf() called with invalid format character '%c'\n", 658 res_type); 659 return 0; 660 } 661 662 if (!success && !quiet) 663 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 664 method, fmt0, acpi_format_exception(status)); 665 666 return success; 667 } 668 669 static int acpi_ec_read(int i, u8 *p) 670 { 671 int v; 672 673 if (ecrd_handle) { 674 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 675 return 0; 676 *p = v; 677 } else { 678 if (ec_read(i, p) < 0) 679 return 0; 680 } 681 682 return 1; 683 } 684 685 static int acpi_ec_write(int i, u8 v) 686 { 687 if (ecwr_handle) { 688 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 689 return 0; 690 } else { 691 if (ec_write(i, v) < 0) 692 return 0; 693 } 694 695 return 1; 696 } 697 698 static int issue_thinkpad_cmos_command(int cmos_cmd) 699 { 700 if (!cmos_handle) 701 return -ENXIO; 702 703 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 704 return -EIO; 705 706 return 0; 707 } 708 709 /************************************************************************* 710 * ACPI device model 711 */ 712 713 #define TPACPI_ACPIHANDLE_INIT(object) \ 714 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 715 object##_paths, ARRAY_SIZE(object##_paths)) 716 717 static void __init drv_acpi_handle_init(const char *name, 718 acpi_handle *handle, const acpi_handle parent, 719 char **paths, const int num_paths) 720 { 721 int i; 722 acpi_status status; 723 724 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 725 name); 726 727 for (i = 0; i < num_paths; i++) { 728 status = acpi_get_handle(parent, paths[i], handle); 729 if (ACPI_SUCCESS(status)) { 730 dbg_printk(TPACPI_DBG_INIT, 731 "Found ACPI handle %s for %s\n", 732 paths[i], name); 733 return; 734 } 735 } 736 737 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 738 name); 739 *handle = NULL; 740 } 741 742 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 743 u32 level, void *context, void **return_value) 744 { 745 if (!strcmp(context, "video")) { 746 struct acpi_device *dev = acpi_fetch_acpi_dev(handle); 747 748 if (!dev || strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 749 return AE_OK; 750 } 751 752 *(acpi_handle *)return_value = handle; 753 754 return AE_CTRL_TERMINATE; 755 } 756 757 static void __init tpacpi_acpi_handle_locate(const char *name, 758 const char *hid, 759 acpi_handle *handle) 760 { 761 acpi_status status; 762 acpi_handle device_found; 763 764 BUG_ON(!name || !handle); 765 vdbg_printk(TPACPI_DBG_INIT, 766 "trying to locate ACPI handle for %s, using HID %s\n", 767 name, hid ? hid : "NULL"); 768 769 memset(&device_found, 0, sizeof(device_found)); 770 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 771 (void *)name, &device_found); 772 773 *handle = NULL; 774 775 if (ACPI_SUCCESS(status)) { 776 *handle = device_found; 777 dbg_printk(TPACPI_DBG_INIT, 778 "Found ACPI handle for %s\n", name); 779 } else { 780 vdbg_printk(TPACPI_DBG_INIT, 781 "Could not locate an ACPI handle for %s: %s\n", 782 name, acpi_format_exception(status)); 783 } 784 } 785 786 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 787 { 788 struct ibm_struct *ibm = data; 789 790 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 791 return; 792 793 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 794 return; 795 796 ibm->acpi->notify(ibm, event); 797 } 798 799 static int __init setup_acpi_notify(struct ibm_struct *ibm) 800 { 801 acpi_status status; 802 803 BUG_ON(!ibm->acpi); 804 805 if (!*ibm->acpi->handle) 806 return 0; 807 808 vdbg_printk(TPACPI_DBG_INIT, 809 "setting up ACPI notify for %s\n", ibm->name); 810 811 ibm->acpi->device = acpi_fetch_acpi_dev(*ibm->acpi->handle); 812 if (!ibm->acpi->device) { 813 pr_err("acpi_fetch_acpi_dev(%s) failed\n", ibm->name); 814 return -ENODEV; 815 } 816 817 ibm->acpi->device->driver_data = ibm; 818 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 819 TPACPI_ACPI_EVENT_PREFIX, 820 ibm->name); 821 822 status = acpi_install_notify_handler(*ibm->acpi->handle, 823 ibm->acpi->type, dispatch_acpi_notify, ibm); 824 if (ACPI_FAILURE(status)) { 825 if (status == AE_ALREADY_EXISTS) { 826 pr_notice("another device driver is already handling %s events\n", 827 ibm->name); 828 } else { 829 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 830 ibm->name, acpi_format_exception(status)); 831 } 832 return -ENODEV; 833 } 834 ibm->flags.acpi_notify_installed = 1; 835 return 0; 836 } 837 838 static int __init tpacpi_device_add(struct acpi_device *device) 839 { 840 return 0; 841 } 842 843 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 844 { 845 int rc; 846 847 dbg_printk(TPACPI_DBG_INIT, 848 "registering %s as an ACPI driver\n", ibm->name); 849 850 BUG_ON(!ibm->acpi); 851 852 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 853 if (!ibm->acpi->driver) { 854 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 855 return -ENOMEM; 856 } 857 858 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 859 ibm->acpi->driver->ids = ibm->acpi->hid; 860 861 ibm->acpi->driver->ops.add = &tpacpi_device_add; 862 863 rc = acpi_bus_register_driver(ibm->acpi->driver); 864 if (rc < 0) { 865 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 866 ibm->name, rc); 867 kfree(ibm->acpi->driver); 868 ibm->acpi->driver = NULL; 869 } else if (!rc) 870 ibm->flags.acpi_driver_registered = 1; 871 872 return rc; 873 } 874 875 876 /**************************************************************************** 877 **************************************************************************** 878 * 879 * Procfs Helpers 880 * 881 **************************************************************************** 882 ****************************************************************************/ 883 884 static int dispatch_proc_show(struct seq_file *m, void *v) 885 { 886 struct ibm_struct *ibm = m->private; 887 888 if (!ibm || !ibm->read) 889 return -EINVAL; 890 return ibm->read(m); 891 } 892 893 static int dispatch_proc_open(struct inode *inode, struct file *file) 894 { 895 return single_open(file, dispatch_proc_show, pde_data(inode)); 896 } 897 898 static ssize_t dispatch_proc_write(struct file *file, 899 const char __user *userbuf, 900 size_t count, loff_t *pos) 901 { 902 struct ibm_struct *ibm = pde_data(file_inode(file)); 903 char *kernbuf; 904 int ret; 905 906 if (!ibm || !ibm->write) 907 return -EINVAL; 908 if (count > PAGE_SIZE - 1) 909 return -EINVAL; 910 911 kernbuf = memdup_user_nul(userbuf, count); 912 if (IS_ERR(kernbuf)) 913 return PTR_ERR(kernbuf); 914 ret = ibm->write(kernbuf); 915 if (ret == 0) 916 ret = count; 917 918 kfree(kernbuf); 919 920 return ret; 921 } 922 923 static const struct proc_ops dispatch_proc_ops = { 924 .proc_open = dispatch_proc_open, 925 .proc_read = seq_read, 926 .proc_lseek = seq_lseek, 927 .proc_release = single_release, 928 .proc_write = dispatch_proc_write, 929 }; 930 931 /**************************************************************************** 932 **************************************************************************** 933 * 934 * Device model: input, hwmon and platform 935 * 936 **************************************************************************** 937 ****************************************************************************/ 938 939 static struct platform_device *tpacpi_pdev; 940 static struct platform_device *tpacpi_sensors_pdev; 941 static struct device *tpacpi_hwmon; 942 static struct input_dev *tpacpi_inputdev; 943 static struct mutex tpacpi_inputdev_send_mutex; 944 static LIST_HEAD(tpacpi_all_drivers); 945 946 #ifdef CONFIG_PM_SLEEP 947 static int tpacpi_suspend_handler(struct device *dev) 948 { 949 struct ibm_struct *ibm, *itmp; 950 951 list_for_each_entry_safe(ibm, itmp, 952 &tpacpi_all_drivers, 953 all_drivers) { 954 if (ibm->suspend) 955 (ibm->suspend)(); 956 } 957 958 return 0; 959 } 960 961 static int tpacpi_resume_handler(struct device *dev) 962 { 963 struct ibm_struct *ibm, *itmp; 964 965 list_for_each_entry_safe(ibm, itmp, 966 &tpacpi_all_drivers, 967 all_drivers) { 968 if (ibm->resume) 969 (ibm->resume)(); 970 } 971 972 return 0; 973 } 974 #endif 975 976 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 977 tpacpi_suspend_handler, tpacpi_resume_handler); 978 979 static void tpacpi_shutdown_handler(struct platform_device *pdev) 980 { 981 struct ibm_struct *ibm, *itmp; 982 983 list_for_each_entry_safe(ibm, itmp, 984 &tpacpi_all_drivers, 985 all_drivers) { 986 if (ibm->shutdown) 987 (ibm->shutdown)(); 988 } 989 } 990 991 /************************************************************************* 992 * sysfs support helpers 993 */ 994 995 static int parse_strtoul(const char *buf, 996 unsigned long max, unsigned long *value) 997 { 998 char *endp; 999 1000 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1001 endp = skip_spaces(endp); 1002 if (*endp || *value > max) 1003 return -EINVAL; 1004 1005 return 0; 1006 } 1007 1008 static void tpacpi_disable_brightness_delay(void) 1009 { 1010 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1011 pr_notice("ACPI backlight control delay disabled\n"); 1012 } 1013 1014 static void printk_deprecated_attribute(const char * const what, 1015 const char * const details) 1016 { 1017 tpacpi_log_usertask("deprecated sysfs attribute"); 1018 pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n", 1019 what, details); 1020 } 1021 1022 /************************************************************************* 1023 * rfkill and radio control support helpers 1024 */ 1025 1026 /* 1027 * ThinkPad-ACPI firmware handling model: 1028 * 1029 * WLSW (master wireless switch) is event-driven, and is common to all 1030 * firmware-controlled radios. It cannot be controlled, just monitored, 1031 * as expected. It overrides all radio state in firmware 1032 * 1033 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1034 * (TODO: verify how WLSW interacts with the returned radio state). 1035 * 1036 * The only time there are shadow radio state changes, is when 1037 * masked-off hotkeys are used. 1038 */ 1039 1040 /* 1041 * Internal driver API for radio state: 1042 * 1043 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1044 * bool: true means radio blocked (off) 1045 */ 1046 enum tpacpi_rfkill_state { 1047 TPACPI_RFK_RADIO_OFF = 0, 1048 TPACPI_RFK_RADIO_ON 1049 }; 1050 1051 /* rfkill switches */ 1052 enum tpacpi_rfk_id { 1053 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1054 TPACPI_RFK_WWAN_SW_ID, 1055 TPACPI_RFK_UWB_SW_ID, 1056 TPACPI_RFK_SW_MAX 1057 }; 1058 1059 static const char *tpacpi_rfkill_names[] = { 1060 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1061 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1062 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1063 [TPACPI_RFK_SW_MAX] = NULL 1064 }; 1065 1066 /* ThinkPad-ACPI rfkill subdriver */ 1067 struct tpacpi_rfk { 1068 struct rfkill *rfkill; 1069 enum tpacpi_rfk_id id; 1070 const struct tpacpi_rfk_ops *ops; 1071 }; 1072 1073 struct tpacpi_rfk_ops { 1074 /* firmware interface */ 1075 int (*get_status)(void); 1076 int (*set_status)(const enum tpacpi_rfkill_state); 1077 }; 1078 1079 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1080 1081 /* Query FW and update rfkill sw state for a given rfkill switch */ 1082 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1083 { 1084 int status; 1085 1086 if (!tp_rfk) 1087 return -ENODEV; 1088 1089 status = (tp_rfk->ops->get_status)(); 1090 if (status < 0) 1091 return status; 1092 1093 rfkill_set_sw_state(tp_rfk->rfkill, 1094 (status == TPACPI_RFK_RADIO_OFF)); 1095 1096 return status; 1097 } 1098 1099 /* 1100 * Sync the HW-blocking state of all rfkill switches, 1101 * do notice it causes the rfkill core to schedule uevents 1102 */ 1103 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1104 { 1105 unsigned int i; 1106 struct tpacpi_rfk *tp_rfk; 1107 1108 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1109 tp_rfk = tpacpi_rfkill_switches[i]; 1110 if (tp_rfk) { 1111 if (rfkill_set_hw_state(tp_rfk->rfkill, 1112 blocked)) { 1113 /* ignore -- we track sw block */ 1114 } 1115 } 1116 } 1117 } 1118 1119 /* Call to get the WLSW state from the firmware */ 1120 static int hotkey_get_wlsw(void); 1121 1122 /* Call to query WLSW state and update all rfkill switches */ 1123 static bool tpacpi_rfk_check_hwblock_state(void) 1124 { 1125 int res = hotkey_get_wlsw(); 1126 int hw_blocked; 1127 1128 /* When unknown or unsupported, we have to assume it is unblocked */ 1129 if (res < 0) 1130 return false; 1131 1132 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1133 tpacpi_rfk_update_hwblock_state(hw_blocked); 1134 1135 return hw_blocked; 1136 } 1137 1138 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1139 { 1140 struct tpacpi_rfk *tp_rfk = data; 1141 int res; 1142 1143 dbg_printk(TPACPI_DBG_RFKILL, 1144 "request to change radio state to %s\n", 1145 blocked ? "blocked" : "unblocked"); 1146 1147 /* try to set radio state */ 1148 res = (tp_rfk->ops->set_status)(blocked ? 1149 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1150 1151 /* and update the rfkill core with whatever the FW really did */ 1152 tpacpi_rfk_update_swstate(tp_rfk); 1153 1154 return (res < 0) ? res : 0; 1155 } 1156 1157 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1158 .set_block = tpacpi_rfk_hook_set_block, 1159 }; 1160 1161 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1162 const struct tpacpi_rfk_ops *tp_rfkops, 1163 const enum rfkill_type rfktype, 1164 const char *name, 1165 const bool set_default) 1166 { 1167 struct tpacpi_rfk *atp_rfk; 1168 int res; 1169 bool sw_state = false; 1170 bool hw_state; 1171 int sw_status; 1172 1173 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1174 1175 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1176 if (atp_rfk) 1177 atp_rfk->rfkill = rfkill_alloc(name, 1178 &tpacpi_pdev->dev, 1179 rfktype, 1180 &tpacpi_rfk_rfkill_ops, 1181 atp_rfk); 1182 if (!atp_rfk || !atp_rfk->rfkill) { 1183 pr_err("failed to allocate memory for rfkill class\n"); 1184 kfree(atp_rfk); 1185 return -ENOMEM; 1186 } 1187 1188 atp_rfk->id = id; 1189 atp_rfk->ops = tp_rfkops; 1190 1191 sw_status = (tp_rfkops->get_status)(); 1192 if (sw_status < 0) { 1193 pr_err("failed to read initial state for %s, error %d\n", 1194 name, sw_status); 1195 } else { 1196 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1197 if (set_default) { 1198 /* try to keep the initial state, since we ask the 1199 * firmware to preserve it across S5 in NVRAM */ 1200 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1201 } 1202 } 1203 hw_state = tpacpi_rfk_check_hwblock_state(); 1204 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1205 1206 res = rfkill_register(atp_rfk->rfkill); 1207 if (res < 0) { 1208 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1209 rfkill_destroy(atp_rfk->rfkill); 1210 kfree(atp_rfk); 1211 return res; 1212 } 1213 1214 tpacpi_rfkill_switches[id] = atp_rfk; 1215 1216 pr_info("rfkill switch %s: radio is %sblocked\n", 1217 name, (sw_state || hw_state) ? "" : "un"); 1218 return 0; 1219 } 1220 1221 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1222 { 1223 struct tpacpi_rfk *tp_rfk; 1224 1225 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1226 1227 tp_rfk = tpacpi_rfkill_switches[id]; 1228 if (tp_rfk) { 1229 rfkill_unregister(tp_rfk->rfkill); 1230 rfkill_destroy(tp_rfk->rfkill); 1231 tpacpi_rfkill_switches[id] = NULL; 1232 kfree(tp_rfk); 1233 } 1234 } 1235 1236 static void printk_deprecated_rfkill_attribute(const char * const what) 1237 { 1238 printk_deprecated_attribute(what, 1239 "Please switch to generic rfkill before year 2010"); 1240 } 1241 1242 /* sysfs <radio> enable ------------------------------------------------ */ 1243 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1244 struct device_attribute *attr, 1245 char *buf) 1246 { 1247 int status; 1248 1249 printk_deprecated_rfkill_attribute(attr->attr.name); 1250 1251 /* This is in the ABI... */ 1252 if (tpacpi_rfk_check_hwblock_state()) { 1253 status = TPACPI_RFK_RADIO_OFF; 1254 } else { 1255 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1256 if (status < 0) 1257 return status; 1258 } 1259 1260 return sysfs_emit(buf, "%d\n", 1261 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1262 } 1263 1264 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1265 struct device_attribute *attr, 1266 const char *buf, size_t count) 1267 { 1268 unsigned long t; 1269 int res; 1270 1271 printk_deprecated_rfkill_attribute(attr->attr.name); 1272 1273 if (parse_strtoul(buf, 1, &t)) 1274 return -EINVAL; 1275 1276 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1277 1278 /* This is in the ABI... */ 1279 if (tpacpi_rfk_check_hwblock_state() && !!t) 1280 return -EPERM; 1281 1282 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1283 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1284 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1285 1286 return (res < 0) ? res : count; 1287 } 1288 1289 /* procfs -------------------------------------------------------------- */ 1290 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1291 { 1292 if (id >= TPACPI_RFK_SW_MAX) 1293 seq_printf(m, "status:\t\tnot supported\n"); 1294 else { 1295 int status; 1296 1297 /* This is in the ABI... */ 1298 if (tpacpi_rfk_check_hwblock_state()) { 1299 status = TPACPI_RFK_RADIO_OFF; 1300 } else { 1301 status = tpacpi_rfk_update_swstate( 1302 tpacpi_rfkill_switches[id]); 1303 if (status < 0) 1304 return status; 1305 } 1306 1307 seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status == TPACPI_RFK_RADIO_ON)); 1308 seq_printf(m, "commands:\tenable, disable\n"); 1309 } 1310 1311 return 0; 1312 } 1313 1314 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1315 { 1316 char *cmd; 1317 int status = -1; 1318 int res = 0; 1319 1320 if (id >= TPACPI_RFK_SW_MAX) 1321 return -ENODEV; 1322 1323 while ((cmd = strsep(&buf, ","))) { 1324 if (strstarts(cmd, "enable")) 1325 status = TPACPI_RFK_RADIO_ON; 1326 else if (strstarts(cmd, "disable")) 1327 status = TPACPI_RFK_RADIO_OFF; 1328 else 1329 return -EINVAL; 1330 } 1331 1332 if (status != -1) { 1333 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1334 str_enable_disable(status == TPACPI_RFK_RADIO_ON), 1335 tpacpi_rfkill_names[id]); 1336 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1337 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1338 } 1339 1340 return res; 1341 } 1342 1343 /************************************************************************* 1344 * thinkpad-acpi driver attributes 1345 */ 1346 1347 /* interface_version --------------------------------------------------- */ 1348 static ssize_t interface_version_show(struct device_driver *drv, char *buf) 1349 { 1350 return sysfs_emit(buf, "0x%08x\n", TPACPI_SYSFS_VERSION); 1351 } 1352 static DRIVER_ATTR_RO(interface_version); 1353 1354 /* debug_level --------------------------------------------------------- */ 1355 static ssize_t debug_level_show(struct device_driver *drv, char *buf) 1356 { 1357 return sysfs_emit(buf, "0x%04x\n", dbg_level); 1358 } 1359 1360 static ssize_t debug_level_store(struct device_driver *drv, const char *buf, 1361 size_t count) 1362 { 1363 unsigned long t; 1364 1365 if (parse_strtoul(buf, 0xffff, &t)) 1366 return -EINVAL; 1367 1368 dbg_level = t; 1369 1370 return count; 1371 } 1372 static DRIVER_ATTR_RW(debug_level); 1373 1374 /* version ------------------------------------------------------------- */ 1375 static ssize_t version_show(struct device_driver *drv, char *buf) 1376 { 1377 return sysfs_emit(buf, "%s v%s\n", 1378 TPACPI_DESC, TPACPI_VERSION); 1379 } 1380 static DRIVER_ATTR_RO(version); 1381 1382 /* --------------------------------------------------------------------- */ 1383 1384 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1385 1386 /* wlsw_emulstate ------------------------------------------------------ */ 1387 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf) 1388 { 1389 return sysfs_emit(buf, "%d\n", !!tpacpi_wlsw_emulstate); 1390 } 1391 1392 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf, 1393 size_t count) 1394 { 1395 unsigned long t; 1396 1397 if (parse_strtoul(buf, 1, &t)) 1398 return -EINVAL; 1399 1400 if (tpacpi_wlsw_emulstate != !!t) { 1401 tpacpi_wlsw_emulstate = !!t; 1402 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1403 } 1404 1405 return count; 1406 } 1407 static DRIVER_ATTR_RW(wlsw_emulstate); 1408 1409 /* bluetooth_emulstate ------------------------------------------------- */ 1410 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf) 1411 { 1412 return sysfs_emit(buf, "%d\n", !!tpacpi_bluetooth_emulstate); 1413 } 1414 1415 static ssize_t bluetooth_emulstate_store(struct device_driver *drv, 1416 const char *buf, size_t count) 1417 { 1418 unsigned long t; 1419 1420 if (parse_strtoul(buf, 1, &t)) 1421 return -EINVAL; 1422 1423 tpacpi_bluetooth_emulstate = !!t; 1424 1425 return count; 1426 } 1427 static DRIVER_ATTR_RW(bluetooth_emulstate); 1428 1429 /* wwan_emulstate ------------------------------------------------- */ 1430 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf) 1431 { 1432 return sysfs_emit(buf, "%d\n", !!tpacpi_wwan_emulstate); 1433 } 1434 1435 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf, 1436 size_t count) 1437 { 1438 unsigned long t; 1439 1440 if (parse_strtoul(buf, 1, &t)) 1441 return -EINVAL; 1442 1443 tpacpi_wwan_emulstate = !!t; 1444 1445 return count; 1446 } 1447 static DRIVER_ATTR_RW(wwan_emulstate); 1448 1449 /* uwb_emulstate ------------------------------------------------- */ 1450 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf) 1451 { 1452 return sysfs_emit(buf, "%d\n", !!tpacpi_uwb_emulstate); 1453 } 1454 1455 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf, 1456 size_t count) 1457 { 1458 unsigned long t; 1459 1460 if (parse_strtoul(buf, 1, &t)) 1461 return -EINVAL; 1462 1463 tpacpi_uwb_emulstate = !!t; 1464 1465 return count; 1466 } 1467 static DRIVER_ATTR_RW(uwb_emulstate); 1468 #endif 1469 1470 /************************************************************************* 1471 * Firmware Data 1472 */ 1473 1474 /* 1475 * Table of recommended minimum BIOS versions 1476 * 1477 * Reasons for listing: 1478 * 1. Stable BIOS, listed because the unknown amount of 1479 * bugs and bad ACPI behaviour on older versions 1480 * 1481 * 2. BIOS or EC fw with known bugs that trigger on Linux 1482 * 1483 * 3. BIOS with known reduced functionality in older versions 1484 * 1485 * We recommend the latest BIOS and EC version. 1486 * We only support the latest BIOS and EC fw version as a rule. 1487 * 1488 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1489 * Information from users in ThinkWiki 1490 * 1491 * WARNING: we use this table also to detect that the machine is 1492 * a ThinkPad in some cases, so don't remove entries lightly. 1493 */ 1494 1495 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1496 { .vendor = (__v), \ 1497 .bios = TPID(__id1, __id2), \ 1498 .ec = TPACPI_MATCH_ANY, \ 1499 .quirks = TPACPI_MATCH_ANY_VERSION << 16 \ 1500 | TPVER(__bv1, __bv2) } 1501 1502 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1503 __eid, __ev1, __ev2) \ 1504 { .vendor = (__v), \ 1505 .bios = TPID(__bid1, __bid2), \ 1506 .ec = __eid, \ 1507 .quirks = TPVER(__ev1, __ev2) << 16 \ 1508 | TPVER(__bv1, __bv2) } 1509 1510 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1511 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1512 1513 /* Outdated IBM BIOSes often lack the EC id string */ 1514 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1515 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1516 __bv1, __bv2, TPID(__id1, __id2), \ 1517 __ev1, __ev2), \ 1518 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1519 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1520 __ev1, __ev2) 1521 1522 /* Outdated IBM BIOSes often lack the EC id string */ 1523 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1524 __eid1, __eid2, __ev1, __ev2) \ 1525 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1526 __bv1, __bv2, TPID(__eid1, __eid2), \ 1527 __ev1, __ev2), \ 1528 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1529 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1530 __ev1, __ev2) 1531 1532 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1533 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1534 1535 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1536 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1537 __bv1, __bv2, TPID(__id1, __id2), \ 1538 __ev1, __ev2) 1539 1540 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1541 __eid1, __eid2, __ev1, __ev2) \ 1542 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1543 __bv1, __bv2, TPID(__eid1, __eid2), \ 1544 __ev1, __ev2) 1545 1546 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1547 /* Numeric models ------------------ */ 1548 /* FW MODEL BIOS VERS */ 1549 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1550 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1551 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1552 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1553 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1554 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1555 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1556 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1557 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1558 1559 /* A-series ------------------------- */ 1560 /* FW MODEL BIOS VERS EC VERS */ 1561 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1562 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1563 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1564 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1565 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1566 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1567 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1568 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1569 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1570 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1571 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1572 1573 /* G-series ------------------------- */ 1574 /* FW MODEL BIOS VERS */ 1575 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1576 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1577 1578 /* R-series, T-series --------------- */ 1579 /* FW MODEL BIOS VERS EC VERS */ 1580 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1581 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1582 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1583 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1584 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1585 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1586 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1587 T40/p, T41/p, T42/p (1) */ 1588 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1589 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1590 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1591 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1592 1593 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1594 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1595 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1596 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1597 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1598 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1599 1600 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1601 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1602 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1603 1604 /* BIOS FW BIOS VERS EC FW EC VERS */ 1605 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1606 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1607 1608 /* X-series ------------------------- */ 1609 /* FW MODEL BIOS VERS EC VERS */ 1610 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1611 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1612 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1613 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1614 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1615 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1616 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1617 1618 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1619 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1620 1621 /* (0) - older versions lack DMI EC fw string and functionality */ 1622 /* (1) - older versions known to lack functionality */ 1623 }; 1624 1625 #undef TPV_QL1 1626 #undef TPV_QL0 1627 #undef TPV_QI2 1628 #undef TPV_QI1 1629 #undef TPV_QI0 1630 #undef TPV_Q_X 1631 #undef TPV_Q 1632 1633 static void __init tpacpi_check_outdated_fw(void) 1634 { 1635 unsigned long fwvers; 1636 u16 ec_version, bios_version; 1637 1638 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1639 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1640 1641 if (!fwvers) 1642 return; 1643 1644 bios_version = fwvers & 0xffffU; 1645 ec_version = (fwvers >> 16) & 0xffffU; 1646 1647 /* note that unknown versions are set to 0x0000 and we use that */ 1648 if ((bios_version > thinkpad_id.bios_release) || 1649 (ec_version > thinkpad_id.ec_release && 1650 ec_version != TPACPI_MATCH_ANY_VERSION)) { 1651 /* 1652 * The changelogs would let us track down the exact 1653 * reason, but it is just too much of a pain to track 1654 * it. We only list BIOSes that are either really 1655 * broken, or really stable to begin with, so it is 1656 * best if the user upgrades the firmware anyway. 1657 */ 1658 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1659 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n"); 1660 } 1661 } 1662 1663 static bool __init tpacpi_is_fw_known(void) 1664 { 1665 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1666 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1667 } 1668 1669 /**************************************************************************** 1670 **************************************************************************** 1671 * 1672 * Subdrivers 1673 * 1674 **************************************************************************** 1675 ****************************************************************************/ 1676 1677 /************************************************************************* 1678 * thinkpad-acpi metadata subdriver 1679 */ 1680 1681 static int thinkpad_acpi_driver_read(struct seq_file *m) 1682 { 1683 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1684 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1685 return 0; 1686 } 1687 1688 static struct ibm_struct thinkpad_acpi_driver_data = { 1689 .name = "driver", 1690 .read = thinkpad_acpi_driver_read, 1691 }; 1692 1693 /************************************************************************* 1694 * Hotkey subdriver 1695 */ 1696 1697 /* 1698 * ThinkPad firmware event model 1699 * 1700 * The ThinkPad firmware has two main event interfaces: normal ACPI 1701 * notifications (which follow the ACPI standard), and a private event 1702 * interface. 1703 * 1704 * The private event interface also issues events for the hotkeys. As 1705 * the driver gained features, the event handling code ended up being 1706 * built around the hotkey subdriver. This will need to be refactored 1707 * to a more formal event API eventually. 1708 * 1709 * Some "hotkeys" are actually supposed to be used as event reports, 1710 * such as "brightness has changed", "volume has changed", depending on 1711 * the ThinkPad model and how the firmware is operating. 1712 * 1713 * Unlike other classes, hotkey-class events have mask/unmask control on 1714 * non-ancient firmware. However, how it behaves changes a lot with the 1715 * firmware model and version. 1716 */ 1717 1718 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1719 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1720 TP_ACPI_HOTKEYSCAN_FNF2, 1721 TP_ACPI_HOTKEYSCAN_FNF3, 1722 TP_ACPI_HOTKEYSCAN_FNF4, 1723 TP_ACPI_HOTKEYSCAN_FNF5, 1724 TP_ACPI_HOTKEYSCAN_FNF6, 1725 TP_ACPI_HOTKEYSCAN_FNF7, 1726 TP_ACPI_HOTKEYSCAN_FNF8, 1727 TP_ACPI_HOTKEYSCAN_FNF9, 1728 TP_ACPI_HOTKEYSCAN_FNF10, 1729 TP_ACPI_HOTKEYSCAN_FNF11, 1730 TP_ACPI_HOTKEYSCAN_FNF12, 1731 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1732 TP_ACPI_HOTKEYSCAN_FNINSERT, 1733 TP_ACPI_HOTKEYSCAN_FNDELETE, 1734 TP_ACPI_HOTKEYSCAN_FNHOME, 1735 TP_ACPI_HOTKEYSCAN_FNEND, 1736 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1737 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1738 TP_ACPI_HOTKEYSCAN_FNSPACE, 1739 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1740 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1741 TP_ACPI_HOTKEYSCAN_MUTE, 1742 TP_ACPI_HOTKEYSCAN_THINKPAD, 1743 TP_ACPI_HOTKEYSCAN_UNK1, 1744 TP_ACPI_HOTKEYSCAN_UNK2, 1745 TP_ACPI_HOTKEYSCAN_UNK3, 1746 TP_ACPI_HOTKEYSCAN_UNK4, 1747 TP_ACPI_HOTKEYSCAN_UNK5, 1748 TP_ACPI_HOTKEYSCAN_UNK6, 1749 TP_ACPI_HOTKEYSCAN_UNK7, 1750 TP_ACPI_HOTKEYSCAN_UNK8, 1751 1752 /* Adaptive keyboard keycodes */ 1753 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1754 TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1755 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1756 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1757 TP_ACPI_HOTKEYSCAN_CLOUD, 1758 TP_ACPI_HOTKEYSCAN_UNK9, 1759 TP_ACPI_HOTKEYSCAN_VOICE, 1760 TP_ACPI_HOTKEYSCAN_UNK10, 1761 TP_ACPI_HOTKEYSCAN_GESTURES, 1762 TP_ACPI_HOTKEYSCAN_UNK11, 1763 TP_ACPI_HOTKEYSCAN_UNK12, 1764 TP_ACPI_HOTKEYSCAN_UNK13, 1765 TP_ACPI_HOTKEYSCAN_CONFIG, 1766 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1767 TP_ACPI_HOTKEYSCAN_RELOAD, 1768 TP_ACPI_HOTKEYSCAN_BACK, 1769 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1770 TP_ACPI_HOTKEYSCAN_MIC_UP, 1771 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1772 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1773 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1774 1775 /* Lenovo extended keymap, starting at 0x1300 */ 1776 TP_ACPI_HOTKEYSCAN_EXTENDED_START, 1777 /* first new observed key (star, favorites) is 0x1311 */ 1778 TP_ACPI_HOTKEYSCAN_STAR = 69, 1779 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2, 1780 TP_ACPI_HOTKEYSCAN_CALCULATOR, 1781 TP_ACPI_HOTKEYSCAN_BLUETOOTH, 1782 TP_ACPI_HOTKEYSCAN_KEYBOARD, 1783 TP_ACPI_HOTKEYSCAN_FN_RIGHT_SHIFT, /* Used by "Lenovo Quick Clean" */ 1784 TP_ACPI_HOTKEYSCAN_NOTIFICATION_CENTER, 1785 TP_ACPI_HOTKEYSCAN_PICKUP_PHONE, 1786 TP_ACPI_HOTKEYSCAN_HANGUP_PHONE, 1787 1788 /* Hotkey keymap size */ 1789 TPACPI_HOTKEY_MAP_LEN 1790 }; 1791 1792 enum { /* Keys/events available through NVRAM polling */ 1793 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1794 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1795 }; 1796 1797 enum { /* Positions of some of the keys in hotkey masks */ 1798 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1799 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1800 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1801 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1802 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1803 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1804 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1805 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1806 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1807 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1808 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1809 }; 1810 1811 enum { /* NVRAM to ACPI HKEY group map */ 1812 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1813 TP_ACPI_HKEY_ZOOM_MASK | 1814 TP_ACPI_HKEY_DISPSWTCH_MASK | 1815 TP_ACPI_HKEY_HIBERNATE_MASK, 1816 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1817 TP_ACPI_HKEY_BRGHTDWN_MASK, 1818 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1819 TP_ACPI_HKEY_VOLDWN_MASK | 1820 TP_ACPI_HKEY_MUTE_MASK, 1821 }; 1822 1823 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1824 struct tp_nvram_state { 1825 u16 thinkpad_toggle:1; 1826 u16 zoom_toggle:1; 1827 u16 display_toggle:1; 1828 u16 thinklight_toggle:1; 1829 u16 hibernate_toggle:1; 1830 u16 displayexp_toggle:1; 1831 u16 display_state:1; 1832 u16 brightness_toggle:1; 1833 u16 volume_toggle:1; 1834 u16 mute:1; 1835 1836 u8 brightness_level; 1837 u8 volume_level; 1838 }; 1839 1840 /* kthread for the hotkey poller */ 1841 static struct task_struct *tpacpi_hotkey_task; 1842 1843 /* 1844 * Acquire mutex to write poller control variables as an 1845 * atomic block. 1846 * 1847 * Increment hotkey_config_change when changing them if you 1848 * want the kthread to forget old state. 1849 * 1850 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1851 */ 1852 static struct mutex hotkey_thread_data_mutex; 1853 static unsigned int hotkey_config_change; 1854 1855 /* 1856 * hotkey poller control variables 1857 * 1858 * Must be atomic or readers will also need to acquire mutex 1859 * 1860 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1861 * should be used only when the changes need to be taken as 1862 * a block, OR when one needs to force the kthread to forget 1863 * old state. 1864 */ 1865 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 1866 static unsigned int hotkey_poll_freq = 10; /* Hz */ 1867 1868 #define HOTKEY_CONFIG_CRITICAL_START \ 1869 do { \ 1870 mutex_lock(&hotkey_thread_data_mutex); \ 1871 hotkey_config_change++; \ 1872 } while (0); 1873 #define HOTKEY_CONFIG_CRITICAL_END \ 1874 mutex_unlock(&hotkey_thread_data_mutex); 1875 1876 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 1877 1878 #define hotkey_source_mask 0U 1879 #define HOTKEY_CONFIG_CRITICAL_START 1880 #define HOTKEY_CONFIG_CRITICAL_END 1881 1882 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 1883 1884 static struct mutex hotkey_mutex; 1885 1886 static enum { /* Reasons for waking up */ 1887 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 1888 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 1889 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 1890 } hotkey_wakeup_reason; 1891 1892 static int hotkey_autosleep_ack; 1893 1894 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 1895 static u32 hotkey_all_mask; /* all events supported in fw */ 1896 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */ 1897 static u32 hotkey_reserved_mask; /* events better left disabled */ 1898 static u32 hotkey_driver_mask; /* events needed by the driver */ 1899 static u32 hotkey_user_mask; /* events visible to userspace */ 1900 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 1901 1902 static u16 *hotkey_keycode_map; 1903 1904 static void tpacpi_driver_event(const unsigned int hkey_event); 1905 static void hotkey_driver_event(const unsigned int scancode); 1906 static void hotkey_poll_setup(const bool may_warn); 1907 1908 /* HKEY.MHKG() return bits */ 1909 #define TP_HOTKEY_TABLET_MASK (1 << 3) 1910 enum { 1911 TP_ACPI_MULTI_MODE_INVALID = 0, 1912 TP_ACPI_MULTI_MODE_UNKNOWN = 1 << 0, 1913 TP_ACPI_MULTI_MODE_LAPTOP = 1 << 1, 1914 TP_ACPI_MULTI_MODE_TABLET = 1 << 2, 1915 TP_ACPI_MULTI_MODE_FLAT = 1 << 3, 1916 TP_ACPI_MULTI_MODE_STAND = 1 << 4, 1917 TP_ACPI_MULTI_MODE_TENT = 1 << 5, 1918 TP_ACPI_MULTI_MODE_STAND_TENT = 1 << 6, 1919 }; 1920 1921 enum { 1922 /* The following modes are considered tablet mode for the purpose of 1923 * reporting the status to userspace. i.e. in all these modes it makes 1924 * sense to disable the laptop input devices such as touchpad and 1925 * keyboard. 1926 */ 1927 TP_ACPI_MULTI_MODE_TABLET_LIKE = TP_ACPI_MULTI_MODE_TABLET | 1928 TP_ACPI_MULTI_MODE_STAND | 1929 TP_ACPI_MULTI_MODE_TENT | 1930 TP_ACPI_MULTI_MODE_STAND_TENT, 1931 }; 1932 1933 static int hotkey_get_wlsw(void) 1934 { 1935 int status; 1936 1937 if (!tp_features.hotkey_wlsw) 1938 return -ENODEV; 1939 1940 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1941 if (dbg_wlswemul) 1942 return (tpacpi_wlsw_emulstate) ? 1943 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 1944 #endif 1945 1946 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 1947 return -EIO; 1948 1949 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 1950 } 1951 1952 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode) 1953 { 1954 int type = (s >> 16) & 0xffff; 1955 int value = s & 0xffff; 1956 int mode = TP_ACPI_MULTI_MODE_INVALID; 1957 int valid_modes = 0; 1958 1959 if (has_tablet_mode) 1960 *has_tablet_mode = 0; 1961 1962 switch (type) { 1963 case 1: 1964 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 1965 TP_ACPI_MULTI_MODE_TABLET | 1966 TP_ACPI_MULTI_MODE_STAND_TENT; 1967 break; 1968 case 2: 1969 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 1970 TP_ACPI_MULTI_MODE_FLAT | 1971 TP_ACPI_MULTI_MODE_TABLET | 1972 TP_ACPI_MULTI_MODE_STAND | 1973 TP_ACPI_MULTI_MODE_TENT; 1974 break; 1975 case 3: 1976 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 1977 TP_ACPI_MULTI_MODE_FLAT; 1978 break; 1979 case 4: 1980 case 5: 1981 /* In mode 4, FLAT is not specified as a valid mode. However, 1982 * it can be seen at least on the X1 Yoga 2nd Generation. 1983 */ 1984 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 1985 TP_ACPI_MULTI_MODE_FLAT | 1986 TP_ACPI_MULTI_MODE_TABLET | 1987 TP_ACPI_MULTI_MODE_STAND | 1988 TP_ACPI_MULTI_MODE_TENT; 1989 break; 1990 default: 1991 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n", 1992 type, value, TPACPI_MAIL); 1993 return 0; 1994 } 1995 1996 if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE)) 1997 *has_tablet_mode = 1; 1998 1999 switch (value) { 2000 case 1: 2001 mode = TP_ACPI_MULTI_MODE_LAPTOP; 2002 break; 2003 case 2: 2004 mode = TP_ACPI_MULTI_MODE_FLAT; 2005 break; 2006 case 3: 2007 mode = TP_ACPI_MULTI_MODE_TABLET; 2008 break; 2009 case 4: 2010 if (type == 1) 2011 mode = TP_ACPI_MULTI_MODE_STAND_TENT; 2012 else 2013 mode = TP_ACPI_MULTI_MODE_STAND; 2014 break; 2015 case 5: 2016 mode = TP_ACPI_MULTI_MODE_TENT; 2017 break; 2018 default: 2019 if (type == 5 && value == 0xffff) { 2020 pr_warn("Multi mode status is undetected, assuming laptop\n"); 2021 return 0; 2022 } 2023 } 2024 2025 if (!(mode & valid_modes)) { 2026 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n", 2027 value, type, TPACPI_MAIL); 2028 return 0; 2029 } 2030 2031 return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE); 2032 } 2033 2034 static int hotkey_get_tablet_mode(int *status) 2035 { 2036 int s; 2037 2038 switch (tp_features.hotkey_tablet) { 2039 case TP_HOTKEY_TABLET_USES_MHKG: 2040 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2041 return -EIO; 2042 2043 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2044 break; 2045 case TP_HOTKEY_TABLET_USES_GMMS: 2046 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0)) 2047 return -EIO; 2048 2049 *status = hotkey_gmms_get_tablet_mode(s, NULL); 2050 break; 2051 default: 2052 break; 2053 } 2054 2055 return 0; 2056 } 2057 2058 /* 2059 * Reads current event mask from firmware, and updates 2060 * hotkey_acpi_mask accordingly. Also resets any bits 2061 * from hotkey_user_mask that are unavailable to be 2062 * delivered (shadow requirement of the userspace ABI). 2063 */ 2064 static int hotkey_mask_get(void) 2065 { 2066 lockdep_assert_held(&hotkey_mutex); 2067 2068 if (tp_features.hotkey_mask) { 2069 u32 m = 0; 2070 2071 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2072 return -EIO; 2073 2074 hotkey_acpi_mask = m; 2075 } else { 2076 /* no mask support doesn't mean no event support... */ 2077 hotkey_acpi_mask = hotkey_all_mask; 2078 } 2079 2080 /* sync userspace-visible mask */ 2081 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2082 2083 return 0; 2084 } 2085 2086 static void hotkey_mask_warn_incomplete_mask(void) 2087 { 2088 /* log only what the user can fix... */ 2089 const u32 wantedmask = hotkey_driver_mask & 2090 ~(hotkey_acpi_mask | hotkey_source_mask) & 2091 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2092 2093 if (wantedmask) 2094 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2095 } 2096 2097 /* 2098 * Set the firmware mask when supported 2099 * 2100 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2101 * 2102 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2103 */ 2104 static int hotkey_mask_set(u32 mask) 2105 { 2106 int i; 2107 int rc = 0; 2108 2109 const u32 fwmask = mask & ~hotkey_source_mask; 2110 2111 lockdep_assert_held(&hotkey_mutex); 2112 2113 if (tp_features.hotkey_mask) { 2114 for (i = 0; i < 32; i++) { 2115 if (!acpi_evalf(hkey_handle, 2116 NULL, "MHKM", "vdd", i + 1, 2117 !!(mask & (1 << i)))) { 2118 rc = -EIO; 2119 break; 2120 } 2121 } 2122 } 2123 2124 /* 2125 * We *must* make an inconditional call to hotkey_mask_get to 2126 * refresh hotkey_acpi_mask and update hotkey_user_mask 2127 * 2128 * Take the opportunity to also log when we cannot _enable_ 2129 * a given event. 2130 */ 2131 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2132 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n", 2133 fwmask, hotkey_acpi_mask); 2134 } 2135 2136 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2137 hotkey_mask_warn_incomplete_mask(); 2138 2139 return rc; 2140 } 2141 2142 /* 2143 * Sets hotkey_user_mask and tries to set the firmware mask 2144 */ 2145 static int hotkey_user_mask_set(const u32 mask) 2146 { 2147 int rc; 2148 2149 lockdep_assert_held(&hotkey_mutex); 2150 2151 /* Give people a chance to notice they are doing something that 2152 * is bound to go boom on their users sooner or later */ 2153 if (!tp_warned.hotkey_mask_ff && 2154 (mask == 0xffff || mask == 0xffffff || 2155 mask == 0xffffffff)) { 2156 tp_warned.hotkey_mask_ff = 1; 2157 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n", 2158 mask); 2159 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n"); 2160 } 2161 2162 /* Try to enable what the user asked for, plus whatever we need. 2163 * this syncs everything but won't enable bits in hotkey_user_mask */ 2164 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2165 2166 /* Enable the available bits in hotkey_user_mask */ 2167 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2168 2169 return rc; 2170 } 2171 2172 /* 2173 * Sets the driver hotkey mask. 2174 * 2175 * Can be called even if the hotkey subdriver is inactive 2176 */ 2177 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2178 { 2179 int rc; 2180 2181 /* Do the right thing if hotkey_init has not been called yet */ 2182 if (!tp_features.hotkey) { 2183 hotkey_driver_mask = mask; 2184 return 0; 2185 } 2186 2187 mutex_lock(&hotkey_mutex); 2188 2189 HOTKEY_CONFIG_CRITICAL_START 2190 hotkey_driver_mask = mask; 2191 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2192 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2193 #endif 2194 HOTKEY_CONFIG_CRITICAL_END 2195 2196 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2197 ~hotkey_source_mask); 2198 hotkey_poll_setup(true); 2199 2200 mutex_unlock(&hotkey_mutex); 2201 2202 return rc; 2203 } 2204 2205 static int hotkey_status_get(int *status) 2206 { 2207 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2208 return -EIO; 2209 2210 return 0; 2211 } 2212 2213 static int hotkey_status_set(bool enable) 2214 { 2215 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2216 return -EIO; 2217 2218 return 0; 2219 } 2220 2221 static void tpacpi_input_send_tabletsw(void) 2222 { 2223 int state; 2224 2225 if (tp_features.hotkey_tablet && 2226 !hotkey_get_tablet_mode(&state)) { 2227 mutex_lock(&tpacpi_inputdev_send_mutex); 2228 2229 input_report_switch(tpacpi_inputdev, 2230 SW_TABLET_MODE, !!state); 2231 input_sync(tpacpi_inputdev); 2232 2233 mutex_unlock(&tpacpi_inputdev_send_mutex); 2234 } 2235 } 2236 2237 /* Do NOT call without validating scancode first */ 2238 static void tpacpi_input_send_key(const unsigned int scancode) 2239 { 2240 const unsigned int keycode = hotkey_keycode_map[scancode]; 2241 2242 if (keycode != KEY_RESERVED) { 2243 mutex_lock(&tpacpi_inputdev_send_mutex); 2244 2245 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2246 input_report_key(tpacpi_inputdev, keycode, 1); 2247 input_sync(tpacpi_inputdev); 2248 2249 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2250 input_report_key(tpacpi_inputdev, keycode, 0); 2251 input_sync(tpacpi_inputdev); 2252 2253 mutex_unlock(&tpacpi_inputdev_send_mutex); 2254 } 2255 } 2256 2257 /* Do NOT call without validating scancode first */ 2258 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2259 { 2260 hotkey_driver_event(scancode); 2261 if (hotkey_user_mask & (1 << scancode)) 2262 tpacpi_input_send_key(scancode); 2263 } 2264 2265 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2266 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2267 2268 /* Do NOT call without validating scancode first */ 2269 static void tpacpi_hotkey_send_key(unsigned int scancode) 2270 { 2271 tpacpi_input_send_key_masked(scancode); 2272 } 2273 2274 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2275 { 2276 u8 d; 2277 2278 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2279 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2280 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2281 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2282 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2283 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2284 } 2285 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) { 2286 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2287 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2288 } 2289 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2290 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2291 n->displayexp_toggle = 2292 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2293 } 2294 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2295 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2296 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2297 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2298 n->brightness_toggle = 2299 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2300 } 2301 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2302 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2303 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2304 >> TP_NVRAM_POS_LEVEL_VOLUME; 2305 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2306 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2307 } 2308 } 2309 2310 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2311 do { \ 2312 if ((event_mask & (1 << __scancode)) && \ 2313 oldn->__member != newn->__member) \ 2314 tpacpi_hotkey_send_key(__scancode); \ 2315 } while (0) 2316 2317 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2318 do { \ 2319 if (event_mask & (1 << __scancode)) \ 2320 tpacpi_hotkey_send_key(__scancode); \ 2321 } while (0) 2322 2323 static void issue_volchange(const unsigned int oldvol, 2324 const unsigned int newvol, 2325 const u32 event_mask) 2326 { 2327 unsigned int i = oldvol; 2328 2329 while (i > newvol) { 2330 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2331 i--; 2332 } 2333 while (i < newvol) { 2334 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2335 i++; 2336 } 2337 } 2338 2339 static void issue_brightnesschange(const unsigned int oldbrt, 2340 const unsigned int newbrt, 2341 const u32 event_mask) 2342 { 2343 unsigned int i = oldbrt; 2344 2345 while (i > newbrt) { 2346 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2347 i--; 2348 } 2349 while (i < newbrt) { 2350 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2351 i++; 2352 } 2353 } 2354 2355 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2356 struct tp_nvram_state *newn, 2357 const u32 event_mask) 2358 { 2359 2360 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2361 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2362 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2363 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2364 2365 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2366 2367 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2368 2369 /* 2370 * Handle volume 2371 * 2372 * This code is supposed to duplicate the IBM firmware behaviour: 2373 * - Pressing MUTE issues mute hotkey message, even when already mute 2374 * - Pressing Volume up/down issues volume up/down hotkey messages, 2375 * even when already at maximum or minimum volume 2376 * - The act of unmuting issues volume up/down notification, 2377 * depending which key was used to unmute 2378 * 2379 * We are constrained to what the NVRAM can tell us, which is not much 2380 * and certainly not enough if more than one volume hotkey was pressed 2381 * since the last poll cycle. 2382 * 2383 * Just to make our life interesting, some newer Lenovo ThinkPads have 2384 * bugs in the BIOS and may fail to update volume_toggle properly. 2385 */ 2386 if (newn->mute) { 2387 /* muted */ 2388 if (!oldn->mute || 2389 oldn->volume_toggle != newn->volume_toggle || 2390 oldn->volume_level != newn->volume_level) { 2391 /* recently muted, or repeated mute keypress, or 2392 * multiple presses ending in mute */ 2393 issue_volchange(oldn->volume_level, newn->volume_level, 2394 event_mask); 2395 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2396 } 2397 } else { 2398 /* unmute */ 2399 if (oldn->mute) { 2400 /* recently unmuted, issue 'unmute' keypress */ 2401 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2402 } 2403 if (oldn->volume_level != newn->volume_level) { 2404 issue_volchange(oldn->volume_level, newn->volume_level, 2405 event_mask); 2406 } else if (oldn->volume_toggle != newn->volume_toggle) { 2407 /* repeated vol up/down keypress at end of scale ? */ 2408 if (newn->volume_level == 0) 2409 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2410 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2411 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2412 } 2413 } 2414 2415 /* handle brightness */ 2416 if (oldn->brightness_level != newn->brightness_level) { 2417 issue_brightnesschange(oldn->brightness_level, 2418 newn->brightness_level, event_mask); 2419 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2420 /* repeated key presses that didn't change state */ 2421 if (newn->brightness_level == 0) 2422 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2423 else if (newn->brightness_level >= bright_maxlvl 2424 && !tp_features.bright_unkfw) 2425 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2426 } 2427 2428 #undef TPACPI_COMPARE_KEY 2429 #undef TPACPI_MAY_SEND_KEY 2430 } 2431 2432 /* 2433 * Polling driver 2434 * 2435 * We track all events in hotkey_source_mask all the time, since 2436 * most of them are edge-based. We only issue those requested by 2437 * hotkey_user_mask or hotkey_driver_mask, though. 2438 */ 2439 static int hotkey_kthread(void *data) 2440 { 2441 struct tp_nvram_state s[2] = { 0 }; 2442 u32 poll_mask, event_mask; 2443 unsigned int si, so; 2444 unsigned long t; 2445 unsigned int change_detector; 2446 unsigned int poll_freq; 2447 bool was_frozen; 2448 2449 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2450 goto exit; 2451 2452 set_freezable(); 2453 2454 so = 0; 2455 si = 1; 2456 t = 0; 2457 2458 /* Initial state for compares */ 2459 mutex_lock(&hotkey_thread_data_mutex); 2460 change_detector = hotkey_config_change; 2461 poll_mask = hotkey_source_mask; 2462 event_mask = hotkey_source_mask & 2463 (hotkey_driver_mask | hotkey_user_mask); 2464 poll_freq = hotkey_poll_freq; 2465 mutex_unlock(&hotkey_thread_data_mutex); 2466 hotkey_read_nvram(&s[so], poll_mask); 2467 2468 while (!kthread_should_stop()) { 2469 if (t == 0) { 2470 if (likely(poll_freq)) 2471 t = 1000/poll_freq; 2472 else 2473 t = 100; /* should never happen... */ 2474 } 2475 t = msleep_interruptible(t); 2476 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2477 break; 2478 2479 if (t > 0 && !was_frozen) 2480 continue; 2481 2482 mutex_lock(&hotkey_thread_data_mutex); 2483 if (was_frozen || hotkey_config_change != change_detector) { 2484 /* forget old state on thaw or config change */ 2485 si = so; 2486 t = 0; 2487 change_detector = hotkey_config_change; 2488 } 2489 poll_mask = hotkey_source_mask; 2490 event_mask = hotkey_source_mask & 2491 (hotkey_driver_mask | hotkey_user_mask); 2492 poll_freq = hotkey_poll_freq; 2493 mutex_unlock(&hotkey_thread_data_mutex); 2494 2495 if (likely(poll_mask)) { 2496 hotkey_read_nvram(&s[si], poll_mask); 2497 if (likely(si != so)) { 2498 hotkey_compare_and_issue_event(&s[so], &s[si], 2499 event_mask); 2500 } 2501 } 2502 2503 so = si; 2504 si ^= 1; 2505 } 2506 2507 exit: 2508 return 0; 2509 } 2510 2511 static void hotkey_poll_stop_sync(void) 2512 { 2513 lockdep_assert_held(&hotkey_mutex); 2514 2515 if (tpacpi_hotkey_task) { 2516 kthread_stop(tpacpi_hotkey_task); 2517 tpacpi_hotkey_task = NULL; 2518 } 2519 } 2520 2521 static void hotkey_poll_setup(const bool may_warn) 2522 { 2523 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2524 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2525 2526 lockdep_assert_held(&hotkey_mutex); 2527 2528 if (hotkey_poll_freq > 0 && 2529 (poll_driver_mask || 2530 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2531 if (!tpacpi_hotkey_task) { 2532 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2533 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2534 if (IS_ERR(tpacpi_hotkey_task)) { 2535 tpacpi_hotkey_task = NULL; 2536 pr_err("could not create kernel thread for hotkey polling\n"); 2537 } 2538 } 2539 } else { 2540 hotkey_poll_stop_sync(); 2541 if (may_warn && (poll_driver_mask || poll_user_mask) && 2542 hotkey_poll_freq == 0) { 2543 pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n", 2544 poll_user_mask, poll_driver_mask); 2545 } 2546 } 2547 } 2548 2549 static void hotkey_poll_setup_safe(const bool may_warn) 2550 { 2551 mutex_lock(&hotkey_mutex); 2552 hotkey_poll_setup(may_warn); 2553 mutex_unlock(&hotkey_mutex); 2554 } 2555 2556 static void hotkey_poll_set_freq(unsigned int freq) 2557 { 2558 lockdep_assert_held(&hotkey_mutex); 2559 2560 if (!freq) 2561 hotkey_poll_stop_sync(); 2562 2563 hotkey_poll_freq = freq; 2564 } 2565 2566 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2567 2568 static void hotkey_poll_setup(const bool __unused) 2569 { 2570 } 2571 2572 static void hotkey_poll_setup_safe(const bool __unused) 2573 { 2574 } 2575 2576 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2577 2578 static int hotkey_inputdev_open(struct input_dev *dev) 2579 { 2580 switch (tpacpi_lifecycle) { 2581 case TPACPI_LIFE_INIT: 2582 case TPACPI_LIFE_RUNNING: 2583 hotkey_poll_setup_safe(false); 2584 return 0; 2585 case TPACPI_LIFE_EXITING: 2586 return -EBUSY; 2587 } 2588 2589 /* Should only happen if tpacpi_lifecycle is corrupt */ 2590 BUG(); 2591 return -EBUSY; 2592 } 2593 2594 static void hotkey_inputdev_close(struct input_dev *dev) 2595 { 2596 /* disable hotkey polling when possible */ 2597 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2598 !(hotkey_source_mask & hotkey_driver_mask)) 2599 hotkey_poll_setup_safe(false); 2600 } 2601 2602 /* sysfs hotkey enable ------------------------------------------------- */ 2603 static ssize_t hotkey_enable_show(struct device *dev, 2604 struct device_attribute *attr, 2605 char *buf) 2606 { 2607 int res, status; 2608 2609 printk_deprecated_attribute("hotkey_enable", 2610 "Hotkey reporting is always enabled"); 2611 2612 res = hotkey_status_get(&status); 2613 if (res) 2614 return res; 2615 2616 return sysfs_emit(buf, "%d\n", status); 2617 } 2618 2619 static ssize_t hotkey_enable_store(struct device *dev, 2620 struct device_attribute *attr, 2621 const char *buf, size_t count) 2622 { 2623 unsigned long t; 2624 2625 printk_deprecated_attribute("hotkey_enable", 2626 "Hotkeys can be disabled through hotkey_mask"); 2627 2628 if (parse_strtoul(buf, 1, &t)) 2629 return -EINVAL; 2630 2631 if (t == 0) 2632 return -EPERM; 2633 2634 return count; 2635 } 2636 2637 static DEVICE_ATTR_RW(hotkey_enable); 2638 2639 /* sysfs hotkey mask --------------------------------------------------- */ 2640 static ssize_t hotkey_mask_show(struct device *dev, 2641 struct device_attribute *attr, 2642 char *buf) 2643 { 2644 return sysfs_emit(buf, "0x%08x\n", hotkey_user_mask); 2645 } 2646 2647 static ssize_t hotkey_mask_store(struct device *dev, 2648 struct device_attribute *attr, 2649 const char *buf, size_t count) 2650 { 2651 unsigned long t; 2652 int res; 2653 2654 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2655 return -EINVAL; 2656 2657 if (mutex_lock_killable(&hotkey_mutex)) 2658 return -ERESTARTSYS; 2659 2660 res = hotkey_user_mask_set(t); 2661 2662 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2663 hotkey_poll_setup(true); 2664 #endif 2665 2666 mutex_unlock(&hotkey_mutex); 2667 2668 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2669 2670 return (res) ? res : count; 2671 } 2672 2673 static DEVICE_ATTR_RW(hotkey_mask); 2674 2675 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2676 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2677 struct device_attribute *attr, 2678 char *buf) 2679 { 2680 return sprintf(buf, "0\n"); 2681 } 2682 2683 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2684 2685 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2686 static ssize_t hotkey_bios_mask_show(struct device *dev, 2687 struct device_attribute *attr, 2688 char *buf) 2689 { 2690 printk_deprecated_attribute("hotkey_bios_mask", 2691 "This attribute is useless."); 2692 return sysfs_emit(buf, "0x%08x\n", hotkey_orig_mask); 2693 } 2694 2695 static DEVICE_ATTR_RO(hotkey_bios_mask); 2696 2697 /* sysfs hotkey all_mask ----------------------------------------------- */ 2698 static ssize_t hotkey_all_mask_show(struct device *dev, 2699 struct device_attribute *attr, 2700 char *buf) 2701 { 2702 return sysfs_emit(buf, "0x%08x\n", 2703 hotkey_all_mask | hotkey_source_mask); 2704 } 2705 2706 static DEVICE_ATTR_RO(hotkey_all_mask); 2707 2708 /* sysfs hotkey all_mask ----------------------------------------------- */ 2709 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev, 2710 struct device_attribute *attr, 2711 char *buf) 2712 { 2713 return sysfs_emit(buf, "0x%08x\n", 2714 hotkey_adaptive_all_mask | hotkey_source_mask); 2715 } 2716 2717 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask); 2718 2719 /* sysfs hotkey recommended_mask --------------------------------------- */ 2720 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2721 struct device_attribute *attr, 2722 char *buf) 2723 { 2724 return sysfs_emit(buf, "0x%08x\n", 2725 (hotkey_all_mask | hotkey_source_mask) 2726 & ~hotkey_reserved_mask); 2727 } 2728 2729 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2730 2731 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2732 2733 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2734 static ssize_t hotkey_source_mask_show(struct device *dev, 2735 struct device_attribute *attr, 2736 char *buf) 2737 { 2738 return sysfs_emit(buf, "0x%08x\n", hotkey_source_mask); 2739 } 2740 2741 static ssize_t hotkey_source_mask_store(struct device *dev, 2742 struct device_attribute *attr, 2743 const char *buf, size_t count) 2744 { 2745 unsigned long t; 2746 u32 r_ev; 2747 int rc; 2748 2749 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2750 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2751 return -EINVAL; 2752 2753 if (mutex_lock_killable(&hotkey_mutex)) 2754 return -ERESTARTSYS; 2755 2756 HOTKEY_CONFIG_CRITICAL_START 2757 hotkey_source_mask = t; 2758 HOTKEY_CONFIG_CRITICAL_END 2759 2760 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2761 ~hotkey_source_mask); 2762 hotkey_poll_setup(true); 2763 2764 /* check if events needed by the driver got disabled */ 2765 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2766 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2767 2768 mutex_unlock(&hotkey_mutex); 2769 2770 if (rc < 0) 2771 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n"); 2772 2773 if (r_ev) 2774 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n", 2775 r_ev); 2776 2777 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2778 2779 return (rc < 0) ? rc : count; 2780 } 2781 2782 static DEVICE_ATTR_RW(hotkey_source_mask); 2783 2784 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2785 static ssize_t hotkey_poll_freq_show(struct device *dev, 2786 struct device_attribute *attr, 2787 char *buf) 2788 { 2789 return sysfs_emit(buf, "%d\n", hotkey_poll_freq); 2790 } 2791 2792 static ssize_t hotkey_poll_freq_store(struct device *dev, 2793 struct device_attribute *attr, 2794 const char *buf, size_t count) 2795 { 2796 unsigned long t; 2797 2798 if (parse_strtoul(buf, 25, &t)) 2799 return -EINVAL; 2800 2801 if (mutex_lock_killable(&hotkey_mutex)) 2802 return -ERESTARTSYS; 2803 2804 hotkey_poll_set_freq(t); 2805 hotkey_poll_setup(true); 2806 2807 mutex_unlock(&hotkey_mutex); 2808 2809 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2810 2811 return count; 2812 } 2813 2814 static DEVICE_ATTR_RW(hotkey_poll_freq); 2815 2816 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2817 2818 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2819 static ssize_t hotkey_radio_sw_show(struct device *dev, 2820 struct device_attribute *attr, 2821 char *buf) 2822 { 2823 int res; 2824 res = hotkey_get_wlsw(); 2825 if (res < 0) 2826 return res; 2827 2828 /* Opportunistic update */ 2829 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2830 2831 return sysfs_emit(buf, "%d\n", 2832 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2833 } 2834 2835 static DEVICE_ATTR_RO(hotkey_radio_sw); 2836 2837 static void hotkey_radio_sw_notify_change(void) 2838 { 2839 if (tp_features.hotkey_wlsw) 2840 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2841 "hotkey_radio_sw"); 2842 } 2843 2844 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2845 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2846 struct device_attribute *attr, 2847 char *buf) 2848 { 2849 int res, s; 2850 res = hotkey_get_tablet_mode(&s); 2851 if (res < 0) 2852 return res; 2853 2854 return sysfs_emit(buf, "%d\n", !!s); 2855 } 2856 2857 static DEVICE_ATTR_RO(hotkey_tablet_mode); 2858 2859 static void hotkey_tablet_mode_notify_change(void) 2860 { 2861 if (tp_features.hotkey_tablet) 2862 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2863 "hotkey_tablet_mode"); 2864 } 2865 2866 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2867 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2868 struct device_attribute *attr, 2869 char *buf) 2870 { 2871 return sysfs_emit(buf, "%d\n", hotkey_wakeup_reason); 2872 } 2873 2874 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2875 2876 static void hotkey_wakeup_reason_notify_change(void) 2877 { 2878 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2879 "wakeup_reason"); 2880 } 2881 2882 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2883 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2884 struct device_attribute *attr, 2885 char *buf) 2886 { 2887 return sysfs_emit(buf, "%d\n", hotkey_autosleep_ack); 2888 } 2889 2890 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 2891 hotkey_wakeup_hotunplug_complete_show, NULL); 2892 2893 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2894 { 2895 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2896 "wakeup_hotunplug_complete"); 2897 } 2898 2899 /* sysfs adaptive kbd mode --------------------------------------------- */ 2900 2901 static int adaptive_keyboard_get_mode(void); 2902 static int adaptive_keyboard_set_mode(int new_mode); 2903 2904 enum ADAPTIVE_KEY_MODE { 2905 HOME_MODE, 2906 WEB_BROWSER_MODE, 2907 WEB_CONFERENCE_MODE, 2908 FUNCTION_MODE, 2909 LAYFLAT_MODE 2910 }; 2911 2912 static ssize_t adaptive_kbd_mode_show(struct device *dev, 2913 struct device_attribute *attr, 2914 char *buf) 2915 { 2916 int current_mode; 2917 2918 current_mode = adaptive_keyboard_get_mode(); 2919 if (current_mode < 0) 2920 return current_mode; 2921 2922 return sysfs_emit(buf, "%d\n", current_mode); 2923 } 2924 2925 static ssize_t adaptive_kbd_mode_store(struct device *dev, 2926 struct device_attribute *attr, 2927 const char *buf, size_t count) 2928 { 2929 unsigned long t; 2930 int res; 2931 2932 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 2933 return -EINVAL; 2934 2935 res = adaptive_keyboard_set_mode(t); 2936 return (res < 0) ? res : count; 2937 } 2938 2939 static DEVICE_ATTR_RW(adaptive_kbd_mode); 2940 2941 static struct attribute *adaptive_kbd_attributes[] = { 2942 &dev_attr_adaptive_kbd_mode.attr, 2943 NULL 2944 }; 2945 2946 static umode_t hadaptive_kbd_attr_is_visible(struct kobject *kobj, 2947 struct attribute *attr, int n) 2948 { 2949 return tp_features.has_adaptive_kbd ? attr->mode : 0; 2950 } 2951 2952 static const struct attribute_group adaptive_kbd_attr_group = { 2953 .is_visible = hadaptive_kbd_attr_is_visible, 2954 .attrs = adaptive_kbd_attributes, 2955 }; 2956 2957 /* --------------------------------------------------------------------- */ 2958 2959 static struct attribute *hotkey_attributes[] = { 2960 &dev_attr_hotkey_enable.attr, 2961 &dev_attr_hotkey_bios_enabled.attr, 2962 &dev_attr_hotkey_bios_mask.attr, 2963 &dev_attr_wakeup_reason.attr, 2964 &dev_attr_wakeup_hotunplug_complete.attr, 2965 &dev_attr_hotkey_mask.attr, 2966 &dev_attr_hotkey_all_mask.attr, 2967 &dev_attr_hotkey_adaptive_all_mask.attr, 2968 &dev_attr_hotkey_recommended_mask.attr, 2969 &dev_attr_hotkey_tablet_mode.attr, 2970 &dev_attr_hotkey_radio_sw.attr, 2971 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2972 &dev_attr_hotkey_source_mask.attr, 2973 &dev_attr_hotkey_poll_freq.attr, 2974 #endif 2975 NULL 2976 }; 2977 2978 static umode_t hotkey_attr_is_visible(struct kobject *kobj, 2979 struct attribute *attr, int n) 2980 { 2981 if (attr == &dev_attr_hotkey_tablet_mode.attr) { 2982 if (!tp_features.hotkey_tablet) 2983 return 0; 2984 } else if (attr == &dev_attr_hotkey_radio_sw.attr) { 2985 if (!tp_features.hotkey_wlsw) 2986 return 0; 2987 } 2988 2989 return attr->mode; 2990 } 2991 2992 static const struct attribute_group hotkey_attr_group = { 2993 .is_visible = hotkey_attr_is_visible, 2994 .attrs = hotkey_attributes, 2995 }; 2996 2997 /* 2998 * Sync both the hw and sw blocking state of all switches 2999 */ 3000 static void tpacpi_send_radiosw_update(void) 3001 { 3002 int wlsw; 3003 3004 /* 3005 * We must sync all rfkill controllers *before* issuing any 3006 * rfkill input events, or we will race the rfkill core input 3007 * handler. 3008 * 3009 * tpacpi_inputdev_send_mutex works as a synchronization point 3010 * for the above. 3011 * 3012 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3013 */ 3014 3015 wlsw = hotkey_get_wlsw(); 3016 3017 /* Sync hw blocking state first if it is hw-blocked */ 3018 if (wlsw == TPACPI_RFK_RADIO_OFF) 3019 tpacpi_rfk_update_hwblock_state(true); 3020 3021 /* Sync hw blocking state last if it is hw-unblocked */ 3022 if (wlsw == TPACPI_RFK_RADIO_ON) 3023 tpacpi_rfk_update_hwblock_state(false); 3024 3025 /* Issue rfkill input event for WLSW switch */ 3026 if (!(wlsw < 0)) { 3027 mutex_lock(&tpacpi_inputdev_send_mutex); 3028 3029 input_report_switch(tpacpi_inputdev, 3030 SW_RFKILL_ALL, (wlsw > 0)); 3031 input_sync(tpacpi_inputdev); 3032 3033 mutex_unlock(&tpacpi_inputdev_send_mutex); 3034 } 3035 3036 /* 3037 * this can be unconditional, as we will poll state again 3038 * if userspace uses the notify to read data 3039 */ 3040 hotkey_radio_sw_notify_change(); 3041 } 3042 3043 static void hotkey_exit(void) 3044 { 3045 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3046 mutex_lock(&hotkey_mutex); 3047 hotkey_poll_stop_sync(); 3048 mutex_unlock(&hotkey_mutex); 3049 #endif 3050 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3051 "restoring original HKEY status and mask\n"); 3052 /* yes, there is a bitwise or below, we want the 3053 * functions to be called even if one of them fail */ 3054 if (((tp_features.hotkey_mask && 3055 hotkey_mask_set(hotkey_orig_mask)) | 3056 hotkey_status_set(false)) != 0) 3057 pr_err("failed to restore hot key mask to BIOS defaults\n"); 3058 } 3059 3060 static void __init hotkey_unmap(const unsigned int scancode) 3061 { 3062 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3063 clear_bit(hotkey_keycode_map[scancode], 3064 tpacpi_inputdev->keybit); 3065 hotkey_keycode_map[scancode] = KEY_RESERVED; 3066 } 3067 } 3068 3069 /* 3070 * HKEY quirks: 3071 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3072 */ 3073 3074 #define TPACPI_HK_Q_INIMASK 0x0001 3075 3076 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3077 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3078 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3079 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3080 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3081 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3082 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3083 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3084 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3085 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3086 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3087 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3088 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3089 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3090 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3091 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3092 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3093 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3094 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3095 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3096 }; 3097 3098 typedef u16 tpacpi_keymap_entry_t; 3099 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3100 3101 static int hotkey_init_tablet_mode(void) 3102 { 3103 int in_tablet_mode = 0, res; 3104 char *type = NULL; 3105 3106 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) { 3107 int has_tablet_mode; 3108 3109 in_tablet_mode = hotkey_gmms_get_tablet_mode(res, 3110 &has_tablet_mode); 3111 /* 3112 * The Yoga 11e series has 2 accelerometers described by a 3113 * BOSC0200 ACPI node. This setup relies on a Windows service 3114 * which calls special ACPI methods on this node to report 3115 * the laptop/tent/tablet mode to the EC. The bmc150 iio driver 3116 * does not support this, so skip the hotkey on these models. 3117 */ 3118 if (has_tablet_mode && !dual_accel_detect()) 3119 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS; 3120 type = "GMMS"; 3121 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { 3122 /* For X41t, X60t, X61t Tablets... */ 3123 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; 3124 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); 3125 type = "MHKG"; 3126 } 3127 3128 if (!tp_features.hotkey_tablet) 3129 return 0; 3130 3131 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", 3132 type, in_tablet_mode ? "tablet" : "laptop"); 3133 3134 return in_tablet_mode; 3135 } 3136 3137 static int __init hotkey_init(struct ibm_init_struct *iibm) 3138 { 3139 /* Requirements for changing the default keymaps: 3140 * 3141 * 1. Many of the keys are mapped to KEY_RESERVED for very 3142 * good reasons. Do not change them unless you have deep 3143 * knowledge on the IBM and Lenovo ThinkPad firmware for 3144 * the various ThinkPad models. The driver behaves 3145 * differently for KEY_RESERVED: such keys have their 3146 * hot key mask *unset* in mask_recommended, and also 3147 * in the initial hot key mask programmed into the 3148 * firmware at driver load time, which means the firm- 3149 * ware may react very differently if you change them to 3150 * something else; 3151 * 3152 * 2. You must be subscribed to the linux-thinkpad and 3153 * ibm-acpi-devel mailing lists, and you should read the 3154 * list archives since 2007 if you want to change the 3155 * keymaps. This requirement exists so that you will 3156 * know the past history of problems with the thinkpad- 3157 * acpi driver keymaps, and also that you will be 3158 * listening to any bug reports; 3159 * 3160 * 3. Do not send thinkpad-acpi specific patches directly to 3161 * for merging, *ever*. Send them to the linux-acpi 3162 * mailinglist for comments. Merging is to be done only 3163 * through acpi-test and the ACPI maintainer. 3164 * 3165 * If the above is too much to ask, don't change the keymap. 3166 * Ask the thinkpad-acpi maintainer to do it, instead. 3167 */ 3168 3169 enum keymap_index { 3170 TPACPI_KEYMAP_IBM_GENERIC = 0, 3171 TPACPI_KEYMAP_LENOVO_GENERIC, 3172 }; 3173 3174 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3175 /* Generic keymap for IBM ThinkPads */ 3176 [TPACPI_KEYMAP_IBM_GENERIC] = { 3177 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3178 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3179 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3180 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3181 3182 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3183 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3184 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3185 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3186 3187 /* brightness: firmware always reacts to them */ 3188 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3189 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3190 3191 /* Thinklight: firmware always react to it */ 3192 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3193 3194 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3195 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3196 3197 /* Volume: firmware always react to it and reprograms 3198 * the built-in *extra* mixer. Never map it to control 3199 * another mixer by default. */ 3200 KEY_RESERVED, /* 0x14: VOLUME UP */ 3201 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3202 KEY_RESERVED, /* 0x16: MUTE */ 3203 3204 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3205 3206 /* (assignments unknown, please report if found) */ 3207 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3208 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3209 3210 /* No assignments, only used for Adaptive keyboards. */ 3211 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3212 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3213 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3214 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3215 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3216 3217 /* No assignment, used for newer Lenovo models */ 3218 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3219 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3220 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3221 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3222 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3223 KEY_UNKNOWN, KEY_UNKNOWN 3224 3225 }, 3226 3227 /* Generic keymap for Lenovo ThinkPads */ 3228 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3229 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3230 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3231 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3232 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3233 3234 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3235 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3236 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3237 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3238 3239 /* These should be enabled --only-- when ACPI video 3240 * is disabled (i.e. in "vendor" mode), and are handled 3241 * in a special way by the init code */ 3242 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3243 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3244 3245 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3246 3247 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3248 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3249 3250 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3251 * react to it and reprograms the built-in *extra* mixer. 3252 * Never map it to control another mixer by default. 3253 * 3254 * T60?, T61, R60?, R61: firmware and EC tries to send 3255 * these over the regular keyboard, so these are no-ops, 3256 * but there are still weird bugs re. MUTE, so do not 3257 * change unless you get test reports from all Lenovo 3258 * models. May cause the BIOS to interfere with the 3259 * HDA mixer. 3260 */ 3261 KEY_RESERVED, /* 0x14: VOLUME UP */ 3262 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3263 KEY_RESERVED, /* 0x16: MUTE */ 3264 3265 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3266 3267 /* (assignments unknown, please report if found) */ 3268 KEY_UNKNOWN, KEY_UNKNOWN, 3269 3270 /* 3271 * The mic mute button only sends 0x1a. It does not 3272 * automatically mute the mic or change the mute light. 3273 */ 3274 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3275 3276 /* (assignments unknown, please report if found) */ 3277 KEY_UNKNOWN, 3278 3279 /* Extra keys in use since the X240 / T440 / T540 */ 3280 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3281 3282 /* 3283 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3284 * The first item in this list is the Mute button which is 3285 * emitted with 0x103 through 3286 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3287 * symbol is held. 3288 * We'll need to offset those by 0x20. 3289 */ 3290 KEY_RESERVED, /* Mute held, 0x103 */ 3291 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3292 KEY_RESERVED, /* Clipping tool */ 3293 KEY_RESERVED, /* Cloud */ 3294 KEY_RESERVED, 3295 KEY_VOICECOMMAND, /* Voice */ 3296 KEY_RESERVED, 3297 KEY_RESERVED, /* Gestures */ 3298 KEY_RESERVED, 3299 KEY_RESERVED, 3300 KEY_RESERVED, 3301 KEY_CONFIG, /* Settings */ 3302 KEY_RESERVED, /* New tab */ 3303 KEY_REFRESH, /* Reload */ 3304 KEY_BACK, /* Back */ 3305 KEY_RESERVED, /* Microphone down */ 3306 KEY_RESERVED, /* Microphone up */ 3307 KEY_RESERVED, /* Microphone cancellation */ 3308 KEY_RESERVED, /* Camera mode */ 3309 KEY_RESERVED, /* Rotate display, 0x116 */ 3310 3311 /* 3312 * These are found in 2017 models (e.g. T470s, X270). 3313 * The lowest known value is 0x311, which according to 3314 * the manual should launch a user defined favorite 3315 * application. 3316 * 3317 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START, 3318 * corresponding to 0x34. 3319 */ 3320 3321 /* (assignments unknown, please report if found) */ 3322 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3323 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3324 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3325 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3326 KEY_UNKNOWN, 3327 3328 KEY_BOOKMARKS, /* Favorite app, 0x311 */ 3329 KEY_SELECTIVE_SCREENSHOT, /* Clipping tool */ 3330 KEY_CALC, /* Calculator (above numpad, P52) */ 3331 KEY_BLUETOOTH, /* Bluetooth */ 3332 KEY_KEYBOARD, /* Keyboard, 0x315 */ 3333 KEY_FN_RIGHT_SHIFT, /* Fn + right Shift */ 3334 KEY_NOTIFICATION_CENTER, /* Notification Center */ 3335 KEY_PICKUP_PHONE, /* Answer incoming call */ 3336 KEY_HANGUP_PHONE, /* Decline incoming call */ 3337 }, 3338 }; 3339 3340 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3341 /* Generic maps (fallback) */ 3342 { 3343 .vendor = PCI_VENDOR_ID_IBM, 3344 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3345 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3346 }, 3347 { 3348 .vendor = PCI_VENDOR_ID_LENOVO, 3349 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3350 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3351 }, 3352 }; 3353 3354 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3355 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3356 3357 int res, i; 3358 int status; 3359 int hkeyv; 3360 bool radiosw_state = false; 3361 bool tabletsw_state = false; 3362 3363 unsigned long quirks; 3364 unsigned long keymap_id; 3365 3366 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3367 "initializing hotkey subdriver\n"); 3368 3369 BUG_ON(!tpacpi_inputdev); 3370 BUG_ON(tpacpi_inputdev->open != NULL || 3371 tpacpi_inputdev->close != NULL); 3372 3373 TPACPI_ACPIHANDLE_INIT(hkey); 3374 mutex_init(&hotkey_mutex); 3375 3376 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3377 mutex_init(&hotkey_thread_data_mutex); 3378 #endif 3379 3380 /* hotkey not supported on 570 */ 3381 tp_features.hotkey = hkey_handle != NULL; 3382 3383 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3384 "hotkeys are %s\n", 3385 str_supported(tp_features.hotkey)); 3386 3387 if (!tp_features.hotkey) 3388 return -ENODEV; 3389 3390 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3391 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3392 3393 tpacpi_disable_brightness_delay(); 3394 3395 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3396 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3397 for HKEY interface version 0x100 */ 3398 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3399 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3400 "firmware HKEY interface version: 0x%x\n", 3401 hkeyv); 3402 3403 switch (hkeyv >> 8) { 3404 case 1: 3405 /* 3406 * MHKV 0x100 in A31, R40, R40e, 3407 * T4x, X31, and later 3408 */ 3409 3410 /* Paranoia check AND init hotkey_all_mask */ 3411 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3412 "MHKA", "qd")) { 3413 pr_err("missing MHKA handler, please report this to %s\n", 3414 TPACPI_MAIL); 3415 /* Fallback: pre-init for FN+F3,F4,F12 */ 3416 hotkey_all_mask = 0x080cU; 3417 } else { 3418 tp_features.hotkey_mask = 1; 3419 } 3420 break; 3421 3422 case 2: 3423 /* 3424 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3425 */ 3426 3427 /* Paranoia check AND init hotkey_all_mask */ 3428 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3429 "MHKA", "dd", 1)) { 3430 pr_err("missing MHKA handler, please report this to %s\n", 3431 TPACPI_MAIL); 3432 /* Fallback: pre-init for FN+F3,F4,F12 */ 3433 hotkey_all_mask = 0x080cU; 3434 } else { 3435 tp_features.hotkey_mask = 1; 3436 } 3437 3438 /* 3439 * Check if we have an adaptive keyboard, like on the 3440 * Lenovo Carbon X1 2014 (2nd Gen). 3441 */ 3442 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3443 "MHKA", "dd", 2)) { 3444 if (hotkey_adaptive_all_mask != 0) 3445 tp_features.has_adaptive_kbd = true; 3446 } else { 3447 tp_features.has_adaptive_kbd = false; 3448 hotkey_adaptive_all_mask = 0x0U; 3449 } 3450 break; 3451 3452 default: 3453 pr_err("unknown version of the HKEY interface: 0x%x\n", 3454 hkeyv); 3455 pr_err("please report this to %s\n", TPACPI_MAIL); 3456 break; 3457 } 3458 } 3459 3460 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3461 "hotkey masks are %s\n", 3462 str_supported(tp_features.hotkey_mask)); 3463 3464 /* Init hotkey_all_mask if not initialized yet */ 3465 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3466 (quirks & TPACPI_HK_Q_INIMASK)) 3467 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3468 3469 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3470 if (tp_features.hotkey_mask) { 3471 /* hotkey_source_mask *must* be zero for 3472 * the first hotkey_mask_get to return hotkey_orig_mask */ 3473 mutex_lock(&hotkey_mutex); 3474 res = hotkey_mask_get(); 3475 mutex_unlock(&hotkey_mutex); 3476 if (res) 3477 return res; 3478 3479 hotkey_orig_mask = hotkey_acpi_mask; 3480 } else { 3481 hotkey_orig_mask = hotkey_all_mask; 3482 hotkey_acpi_mask = hotkey_all_mask; 3483 } 3484 3485 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3486 if (dbg_wlswemul) { 3487 tp_features.hotkey_wlsw = 1; 3488 radiosw_state = !!tpacpi_wlsw_emulstate; 3489 pr_info("radio switch emulation enabled\n"); 3490 } else 3491 #endif 3492 /* Not all thinkpads have a hardware radio switch */ 3493 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3494 tp_features.hotkey_wlsw = 1; 3495 radiosw_state = !!status; 3496 pr_info("radio switch found; radios are %s\n", str_enabled_disabled(status & BIT(0))); 3497 } 3498 3499 tabletsw_state = hotkey_init_tablet_mode(); 3500 3501 /* Set up key map */ 3502 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3503 ARRAY_SIZE(tpacpi_keymap_qtable)); 3504 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3505 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3506 "using keymap number %lu\n", keymap_id); 3507 3508 hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id], 3509 TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL); 3510 if (!hotkey_keycode_map) { 3511 pr_err("failed to allocate memory for key map\n"); 3512 return -ENOMEM; 3513 } 3514 3515 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3516 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3517 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3518 tpacpi_inputdev->keycode = hotkey_keycode_map; 3519 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3520 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3521 input_set_capability(tpacpi_inputdev, EV_KEY, 3522 hotkey_keycode_map[i]); 3523 } else { 3524 if (i < sizeof(hotkey_reserved_mask)*8) 3525 hotkey_reserved_mask |= 1 << i; 3526 } 3527 } 3528 3529 if (tp_features.hotkey_wlsw) { 3530 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3531 input_report_switch(tpacpi_inputdev, 3532 SW_RFKILL_ALL, radiosw_state); 3533 } 3534 if (tp_features.hotkey_tablet) { 3535 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3536 input_report_switch(tpacpi_inputdev, 3537 SW_TABLET_MODE, tabletsw_state); 3538 } 3539 3540 /* Do not issue duplicate brightness change events to 3541 * userspace. tpacpi_detect_brightness_capabilities() must have 3542 * been called before this point */ 3543 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3544 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n"); 3545 pr_notice("Disabling thinkpad-acpi brightness events by default...\n"); 3546 3547 /* Disable brightness up/down on Lenovo thinkpads when 3548 * ACPI is handling them, otherwise it is plain impossible 3549 * for userspace to do something even remotely sane */ 3550 hotkey_reserved_mask |= 3551 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3552 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3553 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3554 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3555 } 3556 3557 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3558 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3559 & ~hotkey_all_mask 3560 & ~hotkey_reserved_mask; 3561 3562 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3563 "hotkey source mask 0x%08x, polling freq %u\n", 3564 hotkey_source_mask, hotkey_poll_freq); 3565 #endif 3566 3567 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3568 "enabling firmware HKEY event interface...\n"); 3569 res = hotkey_status_set(true); 3570 if (res) { 3571 hotkey_exit(); 3572 return res; 3573 } 3574 mutex_lock(&hotkey_mutex); 3575 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3576 | hotkey_driver_mask) 3577 & ~hotkey_source_mask); 3578 mutex_unlock(&hotkey_mutex); 3579 if (res < 0 && res != -ENXIO) { 3580 hotkey_exit(); 3581 return res; 3582 } 3583 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3584 & ~hotkey_reserved_mask; 3585 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3586 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3587 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3588 3589 tpacpi_inputdev->open = &hotkey_inputdev_open; 3590 tpacpi_inputdev->close = &hotkey_inputdev_close; 3591 3592 hotkey_poll_setup_safe(true); 3593 3594 return 0; 3595 } 3596 3597 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3598 * mode, Web conference mode, Function mode and Lay-flat mode. 3599 * We support Home mode and Function mode currently. 3600 * 3601 * Will consider support rest of modes in future. 3602 * 3603 */ 3604 static const int adaptive_keyboard_modes[] = { 3605 HOME_MODE, 3606 /* WEB_BROWSER_MODE = 2, 3607 WEB_CONFERENCE_MODE = 3, */ 3608 FUNCTION_MODE 3609 }; 3610 3611 #define DFR_CHANGE_ROW 0x101 3612 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3613 #define FIRST_ADAPTIVE_KEY 0x103 3614 3615 /* press Fn key a while second, it will switch to Function Mode. Then 3616 * release Fn key, previous mode be restored. 3617 */ 3618 static bool adaptive_keyboard_mode_is_saved; 3619 static int adaptive_keyboard_prev_mode; 3620 3621 static int adaptive_keyboard_get_mode(void) 3622 { 3623 int mode = 0; 3624 3625 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3626 pr_err("Cannot read adaptive keyboard mode\n"); 3627 return -EIO; 3628 } 3629 3630 return mode; 3631 } 3632 3633 static int adaptive_keyboard_set_mode(int new_mode) 3634 { 3635 if (new_mode < 0 || 3636 new_mode > LAYFLAT_MODE) 3637 return -EINVAL; 3638 3639 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3640 pr_err("Cannot set adaptive keyboard mode\n"); 3641 return -EIO; 3642 } 3643 3644 return 0; 3645 } 3646 3647 static int adaptive_keyboard_get_next_mode(int mode) 3648 { 3649 size_t i; 3650 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3651 3652 for (i = 0; i <= max_mode; i++) { 3653 if (adaptive_keyboard_modes[i] == mode) 3654 break; 3655 } 3656 3657 if (i >= max_mode) 3658 i = 0; 3659 else 3660 i++; 3661 3662 return adaptive_keyboard_modes[i]; 3663 } 3664 3665 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3666 { 3667 int current_mode = 0; 3668 int new_mode = 0; 3669 int keycode; 3670 3671 switch (scancode) { 3672 case DFR_CHANGE_ROW: 3673 if (adaptive_keyboard_mode_is_saved) { 3674 new_mode = adaptive_keyboard_prev_mode; 3675 adaptive_keyboard_mode_is_saved = false; 3676 } else { 3677 current_mode = adaptive_keyboard_get_mode(); 3678 if (current_mode < 0) 3679 return false; 3680 new_mode = adaptive_keyboard_get_next_mode( 3681 current_mode); 3682 } 3683 3684 if (adaptive_keyboard_set_mode(new_mode) < 0) 3685 return false; 3686 3687 return true; 3688 3689 case DFR_SHOW_QUICKVIEW_ROW: 3690 current_mode = adaptive_keyboard_get_mode(); 3691 if (current_mode < 0) 3692 return false; 3693 3694 adaptive_keyboard_prev_mode = current_mode; 3695 adaptive_keyboard_mode_is_saved = true; 3696 3697 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3698 return false; 3699 return true; 3700 3701 default: 3702 if (scancode < FIRST_ADAPTIVE_KEY || 3703 scancode >= FIRST_ADAPTIVE_KEY + 3704 TP_ACPI_HOTKEYSCAN_EXTENDED_START - 3705 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3706 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3707 scancode); 3708 return false; 3709 } 3710 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + 3711 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START]; 3712 if (keycode != KEY_RESERVED) { 3713 mutex_lock(&tpacpi_inputdev_send_mutex); 3714 3715 input_report_key(tpacpi_inputdev, keycode, 1); 3716 input_sync(tpacpi_inputdev); 3717 3718 input_report_key(tpacpi_inputdev, keycode, 0); 3719 input_sync(tpacpi_inputdev); 3720 3721 mutex_unlock(&tpacpi_inputdev_send_mutex); 3722 } 3723 return true; 3724 } 3725 } 3726 3727 static bool hotkey_notify_extended_hotkey(const u32 hkey) 3728 { 3729 unsigned int scancode; 3730 3731 switch (hkey) { 3732 case TP_HKEY_EV_PRIVACYGUARD_TOGGLE: 3733 case TP_HKEY_EV_AMT_TOGGLE: 3734 tpacpi_driver_event(hkey); 3735 return true; 3736 } 3737 3738 /* Extended keycodes start at 0x300 and our offset into the map 3739 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode 3740 * will be positive, but might not be in the correct range. 3741 */ 3742 scancode = (hkey & 0xfff) - (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START); 3743 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START && 3744 scancode < TPACPI_HOTKEY_MAP_LEN) { 3745 tpacpi_input_send_key(scancode); 3746 return true; 3747 } 3748 3749 return false; 3750 } 3751 3752 static bool hotkey_notify_hotkey(const u32 hkey, 3753 bool *send_acpi_ev, 3754 bool *ignore_acpi_ev) 3755 { 3756 /* 0x1000-0x1FFF: key presses */ 3757 unsigned int scancode = hkey & 0xfff; 3758 *send_acpi_ev = true; 3759 *ignore_acpi_ev = false; 3760 3761 /* 3762 * Original events are in the 0x10XX range, the adaptive keyboard 3763 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017 3764 * models, additional keys are emitted through 0x13XX. 3765 */ 3766 switch ((hkey >> 8) & 0xf) { 3767 case 0: 3768 if (scancode > 0 && 3769 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3770 /* HKEY event 0x1001 is scancode 0x00 */ 3771 scancode--; 3772 if (!(hotkey_source_mask & (1 << scancode))) { 3773 tpacpi_input_send_key_masked(scancode); 3774 *send_acpi_ev = false; 3775 } else { 3776 *ignore_acpi_ev = true; 3777 } 3778 return true; 3779 } 3780 break; 3781 3782 case 1: 3783 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3784 3785 case 3: 3786 return hotkey_notify_extended_hotkey(hkey); 3787 } 3788 3789 return false; 3790 } 3791 3792 static bool hotkey_notify_wakeup(const u32 hkey, 3793 bool *send_acpi_ev, 3794 bool *ignore_acpi_ev) 3795 { 3796 /* 0x2000-0x2FFF: Wakeup reason */ 3797 *send_acpi_ev = true; 3798 *ignore_acpi_ev = false; 3799 3800 switch (hkey) { 3801 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3802 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3803 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3804 *ignore_acpi_ev = true; 3805 break; 3806 3807 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3808 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3809 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3810 *ignore_acpi_ev = true; 3811 break; 3812 3813 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3814 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3815 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3816 /* how to auto-heal: */ 3817 /* 2313: woke up from S3, go to S4/S5 */ 3818 /* 2413: woke up from S4, go to S5 */ 3819 break; 3820 3821 default: 3822 return false; 3823 } 3824 3825 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3826 pr_info("woke up due to a hot-unplug request...\n"); 3827 hotkey_wakeup_reason_notify_change(); 3828 } 3829 return true; 3830 } 3831 3832 static bool hotkey_notify_dockevent(const u32 hkey, 3833 bool *send_acpi_ev, 3834 bool *ignore_acpi_ev) 3835 { 3836 /* 0x4000-0x4FFF: dock-related events */ 3837 *send_acpi_ev = true; 3838 *ignore_acpi_ev = false; 3839 3840 switch (hkey) { 3841 case TP_HKEY_EV_UNDOCK_ACK: 3842 /* ACPI undock operation completed after wakeup */ 3843 hotkey_autosleep_ack = 1; 3844 pr_info("undocked\n"); 3845 hotkey_wakeup_hotunplug_complete_notify_change(); 3846 return true; 3847 3848 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3849 pr_info("docked into hotplug port replicator\n"); 3850 return true; 3851 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3852 pr_info("undocked from hotplug port replicator\n"); 3853 return true; 3854 3855 /* 3856 * Deliberately ignore attaching and detaching the keybord cover to avoid 3857 * duplicates from intel-vbtn, which already emits SW_TABLET_MODE events 3858 * to userspace. 3859 * 3860 * Please refer to the following thread for more information and a preliminary 3861 * implementation using the GTOP ("Get Tablet OPtions") interface that could be 3862 * extended to other attachment options of the ThinkPad X1 Tablet series, such as 3863 * the Pico cartridge dock module: 3864 * https://lore.kernel.org/platform-driver-x86/38cb8265-1e30-d547-9e12-b4ae290be737@a-kobel.de/ 3865 */ 3866 case TP_HKEY_EV_KBD_COVER_ATTACH: 3867 case TP_HKEY_EV_KBD_COVER_DETACH: 3868 *send_acpi_ev = false; 3869 *ignore_acpi_ev = true; 3870 return true; 3871 3872 default: 3873 return false; 3874 } 3875 } 3876 3877 static bool hotkey_notify_usrevent(const u32 hkey, 3878 bool *send_acpi_ev, 3879 bool *ignore_acpi_ev) 3880 { 3881 /* 0x5000-0x5FFF: human interface helpers */ 3882 *send_acpi_ev = true; 3883 *ignore_acpi_ev = false; 3884 3885 switch (hkey) { 3886 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3887 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3888 return true; 3889 3890 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3891 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3892 tpacpi_input_send_tabletsw(); 3893 hotkey_tablet_mode_notify_change(); 3894 *send_acpi_ev = false; 3895 return true; 3896 3897 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3898 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3899 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3900 /* do not propagate these events */ 3901 *ignore_acpi_ev = true; 3902 return true; 3903 3904 default: 3905 return false; 3906 } 3907 } 3908 3909 static void thermal_dump_all_sensors(void); 3910 static void palmsensor_refresh(void); 3911 3912 static bool hotkey_notify_6xxx(const u32 hkey, 3913 bool *send_acpi_ev, 3914 bool *ignore_acpi_ev) 3915 { 3916 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 3917 *send_acpi_ev = true; 3918 *ignore_acpi_ev = false; 3919 3920 switch (hkey) { 3921 case TP_HKEY_EV_THM_TABLE_CHANGED: 3922 pr_debug("EC reports: Thermal Table has changed\n"); 3923 /* recommended action: do nothing, we don't have 3924 * Lenovo ATM information */ 3925 return true; 3926 case TP_HKEY_EV_THM_CSM_COMPLETED: 3927 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n"); 3928 /* Thermal event - pass on to event handler */ 3929 tpacpi_driver_event(hkey); 3930 return true; 3931 case TP_HKEY_EV_THM_TRANSFM_CHANGED: 3932 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n"); 3933 /* recommended action: do nothing, we don't have 3934 * Lenovo ATM information */ 3935 return true; 3936 case TP_HKEY_EV_ALARM_BAT_HOT: 3937 pr_crit("THERMAL ALARM: battery is too hot!\n"); 3938 /* recommended action: warn user through gui */ 3939 break; 3940 case TP_HKEY_EV_ALARM_BAT_XHOT: 3941 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 3942 /* recommended action: immediate sleep/hibernate */ 3943 break; 3944 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3945 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n"); 3946 /* recommended action: warn user through gui, that */ 3947 /* some internal component is too hot */ 3948 break; 3949 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3950 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n"); 3951 /* recommended action: immediate sleep/hibernate */ 3952 break; 3953 case TP_HKEY_EV_AC_CHANGED: 3954 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 3955 * AC status changed; can be triggered by plugging or 3956 * unplugging AC adapter, docking or undocking. */ 3957 3958 fallthrough; 3959 3960 case TP_HKEY_EV_KEY_NUMLOCK: 3961 case TP_HKEY_EV_KEY_FN: 3962 /* key press events, we just ignore them as long as the EC 3963 * is still reporting them in the normal keyboard stream */ 3964 *send_acpi_ev = false; 3965 *ignore_acpi_ev = true; 3966 return true; 3967 3968 case TP_HKEY_EV_KEY_FN_ESC: 3969 /* Get the media key status to force the status LED to update */ 3970 acpi_evalf(hkey_handle, NULL, "GMKS", "v"); 3971 *send_acpi_ev = false; 3972 *ignore_acpi_ev = true; 3973 return true; 3974 3975 case TP_HKEY_EV_TABLET_CHANGED: 3976 tpacpi_input_send_tabletsw(); 3977 hotkey_tablet_mode_notify_change(); 3978 *send_acpi_ev = false; 3979 return true; 3980 3981 case TP_HKEY_EV_PALM_DETECTED: 3982 case TP_HKEY_EV_PALM_UNDETECTED: 3983 /* palm detected - pass on to event handler */ 3984 palmsensor_refresh(); 3985 return true; 3986 3987 default: 3988 /* report simply as unknown, no sensor dump */ 3989 return false; 3990 } 3991 3992 thermal_dump_all_sensors(); 3993 return true; 3994 } 3995 3996 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3997 { 3998 u32 hkey; 3999 bool send_acpi_ev; 4000 bool ignore_acpi_ev; 4001 bool known_ev; 4002 4003 if (event != 0x80) { 4004 pr_err("unknown HKEY notification event %d\n", event); 4005 /* forward it to userspace, maybe it knows how to handle it */ 4006 acpi_bus_generate_netlink_event( 4007 ibm->acpi->device->pnp.device_class, 4008 dev_name(&ibm->acpi->device->dev), 4009 event, 0); 4010 return; 4011 } 4012 4013 while (1) { 4014 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 4015 pr_err("failed to retrieve HKEY event\n"); 4016 return; 4017 } 4018 4019 if (hkey == 0) { 4020 /* queue empty */ 4021 return; 4022 } 4023 4024 send_acpi_ev = true; 4025 ignore_acpi_ev = false; 4026 4027 switch (hkey >> 12) { 4028 case 1: 4029 /* 0x1000-0x1FFF: key presses */ 4030 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 4031 &ignore_acpi_ev); 4032 break; 4033 case 2: 4034 /* 0x2000-0x2FFF: Wakeup reason */ 4035 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 4036 &ignore_acpi_ev); 4037 break; 4038 case 3: 4039 /* 0x3000-0x3FFF: bay-related wakeups */ 4040 switch (hkey) { 4041 case TP_HKEY_EV_BAYEJ_ACK: 4042 hotkey_autosleep_ack = 1; 4043 pr_info("bay ejected\n"); 4044 hotkey_wakeup_hotunplug_complete_notify_change(); 4045 known_ev = true; 4046 break; 4047 case TP_HKEY_EV_OPTDRV_EJ: 4048 /* FIXME: kick libata if SATA link offline */ 4049 known_ev = true; 4050 break; 4051 default: 4052 known_ev = false; 4053 } 4054 break; 4055 case 4: 4056 /* 0x4000-0x4FFF: dock-related events */ 4057 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 4058 &ignore_acpi_ev); 4059 break; 4060 case 5: 4061 /* 0x5000-0x5FFF: human interface helpers */ 4062 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 4063 &ignore_acpi_ev); 4064 break; 4065 case 6: 4066 /* 0x6000-0x6FFF: thermal alarms/notices and 4067 * keyboard events */ 4068 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 4069 &ignore_acpi_ev); 4070 break; 4071 case 7: 4072 /* 0x7000-0x7FFF: misc */ 4073 if (tp_features.hotkey_wlsw && 4074 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 4075 tpacpi_send_radiosw_update(); 4076 send_acpi_ev = 0; 4077 known_ev = true; 4078 break; 4079 } 4080 fallthrough; /* to default */ 4081 default: 4082 known_ev = false; 4083 } 4084 if (!known_ev) { 4085 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4086 pr_notice("please report the conditions when this event happened to %s\n", 4087 TPACPI_MAIL); 4088 } 4089 4090 /* netlink events */ 4091 if (!ignore_acpi_ev && send_acpi_ev) { 4092 acpi_bus_generate_netlink_event( 4093 ibm->acpi->device->pnp.device_class, 4094 dev_name(&ibm->acpi->device->dev), 4095 event, hkey); 4096 } 4097 } 4098 } 4099 4100 static void hotkey_suspend(void) 4101 { 4102 /* Do these on suspend, we get the events on early resume! */ 4103 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4104 hotkey_autosleep_ack = 0; 4105 4106 /* save previous mode of adaptive keyboard of X1 Carbon */ 4107 if (tp_features.has_adaptive_kbd) { 4108 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4109 "GTRW", "dd", 0)) { 4110 pr_err("Cannot read adaptive keyboard mode.\n"); 4111 } 4112 } 4113 } 4114 4115 static void hotkey_resume(void) 4116 { 4117 tpacpi_disable_brightness_delay(); 4118 4119 mutex_lock(&hotkey_mutex); 4120 if (hotkey_status_set(true) < 0 || 4121 hotkey_mask_set(hotkey_acpi_mask) < 0) 4122 pr_err("error while attempting to reset the event firmware interface\n"); 4123 mutex_unlock(&hotkey_mutex); 4124 4125 tpacpi_send_radiosw_update(); 4126 tpacpi_input_send_tabletsw(); 4127 hotkey_tablet_mode_notify_change(); 4128 hotkey_wakeup_reason_notify_change(); 4129 hotkey_wakeup_hotunplug_complete_notify_change(); 4130 hotkey_poll_setup_safe(false); 4131 4132 /* restore previous mode of adapive keyboard of X1 Carbon */ 4133 if (tp_features.has_adaptive_kbd) { 4134 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4135 adaptive_keyboard_prev_mode)) { 4136 pr_err("Cannot set adaptive keyboard mode.\n"); 4137 } 4138 } 4139 } 4140 4141 /* procfs -------------------------------------------------------------- */ 4142 static int hotkey_read(struct seq_file *m) 4143 { 4144 int res, status; 4145 4146 if (!tp_features.hotkey) { 4147 seq_printf(m, "status:\t\tnot supported\n"); 4148 return 0; 4149 } 4150 4151 if (mutex_lock_killable(&hotkey_mutex)) 4152 return -ERESTARTSYS; 4153 res = hotkey_status_get(&status); 4154 if (!res) 4155 res = hotkey_mask_get(); 4156 mutex_unlock(&hotkey_mutex); 4157 if (res) 4158 return res; 4159 4160 seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status & BIT(0))); 4161 if (hotkey_all_mask) { 4162 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4163 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4164 } else { 4165 seq_printf(m, "mask:\t\tnot supported\n"); 4166 seq_printf(m, "commands:\tenable, disable, reset\n"); 4167 } 4168 4169 return 0; 4170 } 4171 4172 static void hotkey_enabledisable_warn(bool enable) 4173 { 4174 tpacpi_log_usertask("procfs hotkey enable/disable"); 4175 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4176 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n"))) 4177 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n"); 4178 } 4179 4180 static int hotkey_write(char *buf) 4181 { 4182 int res; 4183 u32 mask; 4184 char *cmd; 4185 4186 if (!tp_features.hotkey) 4187 return -ENODEV; 4188 4189 if (mutex_lock_killable(&hotkey_mutex)) 4190 return -ERESTARTSYS; 4191 4192 mask = hotkey_user_mask; 4193 4194 res = 0; 4195 while ((cmd = strsep(&buf, ","))) { 4196 if (strstarts(cmd, "enable")) { 4197 hotkey_enabledisable_warn(1); 4198 } else if (strstarts(cmd, "disable")) { 4199 hotkey_enabledisable_warn(0); 4200 res = -EPERM; 4201 } else if (strstarts(cmd, "reset")) { 4202 mask = (hotkey_all_mask | hotkey_source_mask) 4203 & ~hotkey_reserved_mask; 4204 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4205 /* mask set */ 4206 } else if (sscanf(cmd, "%x", &mask) == 1) { 4207 /* mask set */ 4208 } else { 4209 res = -EINVAL; 4210 goto errexit; 4211 } 4212 } 4213 4214 if (!res) { 4215 tpacpi_disclose_usertask("procfs hotkey", 4216 "set mask to 0x%08x\n", mask); 4217 res = hotkey_user_mask_set(mask); 4218 } 4219 4220 errexit: 4221 mutex_unlock(&hotkey_mutex); 4222 return res; 4223 } 4224 4225 static const struct acpi_device_id ibm_htk_device_ids[] = { 4226 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4227 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4228 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0}, 4229 {"", 0}, 4230 }; 4231 4232 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4233 .hid = ibm_htk_device_ids, 4234 .notify = hotkey_notify, 4235 .handle = &hkey_handle, 4236 .type = ACPI_DEVICE_NOTIFY, 4237 }; 4238 4239 static struct ibm_struct hotkey_driver_data = { 4240 .name = "hotkey", 4241 .read = hotkey_read, 4242 .write = hotkey_write, 4243 .exit = hotkey_exit, 4244 .resume = hotkey_resume, 4245 .suspend = hotkey_suspend, 4246 .acpi = &ibm_hotkey_acpidriver, 4247 }; 4248 4249 /************************************************************************* 4250 * Bluetooth subdriver 4251 */ 4252 4253 enum { 4254 /* ACPI GBDC/SBDC bits */ 4255 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4256 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4257 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4258 0 = disable, 1 = enable */ 4259 }; 4260 4261 enum { 4262 /* ACPI \BLTH commands */ 4263 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4264 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4265 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4266 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4267 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4268 }; 4269 4270 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4271 4272 static int bluetooth_get_status(void) 4273 { 4274 int status; 4275 4276 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4277 if (dbg_bluetoothemul) 4278 return (tpacpi_bluetooth_emulstate) ? 4279 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4280 #endif 4281 4282 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4283 return -EIO; 4284 4285 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4286 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4287 } 4288 4289 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4290 { 4291 int status; 4292 4293 vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s bluetooth\n", 4294 str_enable_disable(state == TPACPI_RFK_RADIO_ON)); 4295 4296 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4297 if (dbg_bluetoothemul) { 4298 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4299 return 0; 4300 } 4301 #endif 4302 4303 if (state == TPACPI_RFK_RADIO_ON) 4304 status = TP_ACPI_BLUETOOTH_RADIOSSW 4305 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4306 else 4307 status = 0; 4308 4309 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4310 return -EIO; 4311 4312 return 0; 4313 } 4314 4315 /* sysfs bluetooth enable ---------------------------------------------- */ 4316 static ssize_t bluetooth_enable_show(struct device *dev, 4317 struct device_attribute *attr, 4318 char *buf) 4319 { 4320 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4321 attr, buf); 4322 } 4323 4324 static ssize_t bluetooth_enable_store(struct device *dev, 4325 struct device_attribute *attr, 4326 const char *buf, size_t count) 4327 { 4328 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4329 attr, buf, count); 4330 } 4331 4332 static DEVICE_ATTR_RW(bluetooth_enable); 4333 4334 /* --------------------------------------------------------------------- */ 4335 4336 static struct attribute *bluetooth_attributes[] = { 4337 &dev_attr_bluetooth_enable.attr, 4338 NULL 4339 }; 4340 4341 static umode_t bluetooth_attr_is_visible(struct kobject *kobj, 4342 struct attribute *attr, int n) 4343 { 4344 return tp_features.bluetooth ? attr->mode : 0; 4345 } 4346 4347 static const struct attribute_group bluetooth_attr_group = { 4348 .is_visible = bluetooth_attr_is_visible, 4349 .attrs = bluetooth_attributes, 4350 }; 4351 4352 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4353 .get_status = bluetooth_get_status, 4354 .set_status = bluetooth_set_status, 4355 }; 4356 4357 static void bluetooth_shutdown(void) 4358 { 4359 /* Order firmware to save current state to NVRAM */ 4360 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4361 TP_ACPI_BLTH_SAVE_STATE)) 4362 pr_notice("failed to save bluetooth state to NVRAM\n"); 4363 else 4364 vdbg_printk(TPACPI_DBG_RFKILL, 4365 "bluetooth state saved to NVRAM\n"); 4366 } 4367 4368 static void bluetooth_exit(void) 4369 { 4370 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4371 bluetooth_shutdown(); 4372 } 4373 4374 static const struct dmi_system_id fwbug_list[] __initconst = { 4375 { 4376 .ident = "ThinkPad E485", 4377 .driver_data = &quirk_btusb_bug, 4378 .matches = { 4379 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4380 DMI_MATCH(DMI_BOARD_NAME, "20KU"), 4381 }, 4382 }, 4383 { 4384 .ident = "ThinkPad E585", 4385 .driver_data = &quirk_btusb_bug, 4386 .matches = { 4387 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4388 DMI_MATCH(DMI_BOARD_NAME, "20KV"), 4389 }, 4390 }, 4391 { 4392 .ident = "ThinkPad A285 - 20MW", 4393 .driver_data = &quirk_btusb_bug, 4394 .matches = { 4395 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4396 DMI_MATCH(DMI_BOARD_NAME, "20MW"), 4397 }, 4398 }, 4399 { 4400 .ident = "ThinkPad A285 - 20MX", 4401 .driver_data = &quirk_btusb_bug, 4402 .matches = { 4403 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4404 DMI_MATCH(DMI_BOARD_NAME, "20MX"), 4405 }, 4406 }, 4407 { 4408 .ident = "ThinkPad A485 - 20MU", 4409 .driver_data = &quirk_btusb_bug, 4410 .matches = { 4411 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4412 DMI_MATCH(DMI_BOARD_NAME, "20MU"), 4413 }, 4414 }, 4415 { 4416 .ident = "ThinkPad A485 - 20MV", 4417 .driver_data = &quirk_btusb_bug, 4418 .matches = { 4419 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4420 DMI_MATCH(DMI_BOARD_NAME, "20MV"), 4421 }, 4422 }, 4423 {} 4424 }; 4425 4426 static const struct pci_device_id fwbug_cards_ids[] __initconst = { 4427 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) }, 4428 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) }, 4429 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) }, 4430 {} 4431 }; 4432 4433 4434 static int __init have_bt_fwbug(void) 4435 { 4436 /* 4437 * Some AMD based ThinkPads have a firmware bug that calling 4438 * "GBDC" will cause bluetooth on Intel wireless cards blocked 4439 */ 4440 if (tp_features.quirks && tp_features.quirks->btusb_bug && 4441 pci_dev_present(fwbug_cards_ids)) { 4442 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4443 FW_BUG "disable bluetooth subdriver for Intel cards\n"); 4444 return 1; 4445 } else 4446 return 0; 4447 } 4448 4449 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4450 { 4451 int res; 4452 int status = 0; 4453 4454 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4455 "initializing bluetooth subdriver\n"); 4456 4457 TPACPI_ACPIHANDLE_INIT(hkey); 4458 4459 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4460 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4461 tp_features.bluetooth = !have_bt_fwbug() && hkey_handle && 4462 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4463 4464 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4465 "bluetooth is %s, status 0x%02x\n", 4466 str_supported(tp_features.bluetooth), 4467 status); 4468 4469 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4470 if (dbg_bluetoothemul) { 4471 tp_features.bluetooth = 1; 4472 pr_info("bluetooth switch emulation enabled\n"); 4473 } else 4474 #endif 4475 if (tp_features.bluetooth && 4476 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4477 /* no bluetooth hardware present in system */ 4478 tp_features.bluetooth = 0; 4479 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4480 "bluetooth hardware not installed\n"); 4481 } 4482 4483 if (!tp_features.bluetooth) 4484 return -ENODEV; 4485 4486 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4487 &bluetooth_tprfk_ops, 4488 RFKILL_TYPE_BLUETOOTH, 4489 TPACPI_RFK_BLUETOOTH_SW_NAME, 4490 true); 4491 return res; 4492 } 4493 4494 /* procfs -------------------------------------------------------------- */ 4495 static int bluetooth_read(struct seq_file *m) 4496 { 4497 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4498 } 4499 4500 static int bluetooth_write(char *buf) 4501 { 4502 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4503 } 4504 4505 static struct ibm_struct bluetooth_driver_data = { 4506 .name = "bluetooth", 4507 .read = bluetooth_read, 4508 .write = bluetooth_write, 4509 .exit = bluetooth_exit, 4510 .shutdown = bluetooth_shutdown, 4511 }; 4512 4513 /************************************************************************* 4514 * Wan subdriver 4515 */ 4516 4517 enum { 4518 /* ACPI GWAN/SWAN bits */ 4519 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4520 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4521 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4522 0 = disable, 1 = enable */ 4523 }; 4524 4525 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4526 4527 static int wan_get_status(void) 4528 { 4529 int status; 4530 4531 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4532 if (dbg_wwanemul) 4533 return (tpacpi_wwan_emulstate) ? 4534 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4535 #endif 4536 4537 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4538 return -EIO; 4539 4540 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4541 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4542 } 4543 4544 static int wan_set_status(enum tpacpi_rfkill_state state) 4545 { 4546 int status; 4547 4548 vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s wwan\n", 4549 str_enable_disable(state == TPACPI_RFK_RADIO_ON)); 4550 4551 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4552 if (dbg_wwanemul) { 4553 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4554 return 0; 4555 } 4556 #endif 4557 4558 if (state == TPACPI_RFK_RADIO_ON) 4559 status = TP_ACPI_WANCARD_RADIOSSW 4560 | TP_ACPI_WANCARD_RESUMECTRL; 4561 else 4562 status = 0; 4563 4564 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4565 return -EIO; 4566 4567 return 0; 4568 } 4569 4570 /* sysfs wan enable ---------------------------------------------------- */ 4571 static ssize_t wan_enable_show(struct device *dev, 4572 struct device_attribute *attr, 4573 char *buf) 4574 { 4575 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4576 attr, buf); 4577 } 4578 4579 static ssize_t wan_enable_store(struct device *dev, 4580 struct device_attribute *attr, 4581 const char *buf, size_t count) 4582 { 4583 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4584 attr, buf, count); 4585 } 4586 4587 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4588 wan_enable_show, wan_enable_store); 4589 4590 /* --------------------------------------------------------------------- */ 4591 4592 static struct attribute *wan_attributes[] = { 4593 &dev_attr_wwan_enable.attr, 4594 NULL 4595 }; 4596 4597 static umode_t wan_attr_is_visible(struct kobject *kobj, struct attribute *attr, 4598 int n) 4599 { 4600 return tp_features.wan ? attr->mode : 0; 4601 } 4602 4603 static const struct attribute_group wan_attr_group = { 4604 .is_visible = wan_attr_is_visible, 4605 .attrs = wan_attributes, 4606 }; 4607 4608 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4609 .get_status = wan_get_status, 4610 .set_status = wan_set_status, 4611 }; 4612 4613 static void wan_shutdown(void) 4614 { 4615 /* Order firmware to save current state to NVRAM */ 4616 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4617 TP_ACPI_WGSV_SAVE_STATE)) 4618 pr_notice("failed to save WWAN state to NVRAM\n"); 4619 else 4620 vdbg_printk(TPACPI_DBG_RFKILL, 4621 "WWAN state saved to NVRAM\n"); 4622 } 4623 4624 static void wan_exit(void) 4625 { 4626 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4627 wan_shutdown(); 4628 } 4629 4630 static int __init wan_init(struct ibm_init_struct *iibm) 4631 { 4632 int res; 4633 int status = 0; 4634 4635 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4636 "initializing wan subdriver\n"); 4637 4638 TPACPI_ACPIHANDLE_INIT(hkey); 4639 4640 tp_features.wan = hkey_handle && 4641 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4642 4643 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4644 "wan is %s, status 0x%02x\n", 4645 str_supported(tp_features.wan), 4646 status); 4647 4648 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4649 if (dbg_wwanemul) { 4650 tp_features.wan = 1; 4651 pr_info("wwan switch emulation enabled\n"); 4652 } else 4653 #endif 4654 if (tp_features.wan && 4655 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4656 /* no wan hardware present in system */ 4657 tp_features.wan = 0; 4658 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4659 "wan hardware not installed\n"); 4660 } 4661 4662 if (!tp_features.wan) 4663 return -ENODEV; 4664 4665 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4666 &wan_tprfk_ops, 4667 RFKILL_TYPE_WWAN, 4668 TPACPI_RFK_WWAN_SW_NAME, 4669 true); 4670 return res; 4671 } 4672 4673 /* procfs -------------------------------------------------------------- */ 4674 static int wan_read(struct seq_file *m) 4675 { 4676 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4677 } 4678 4679 static int wan_write(char *buf) 4680 { 4681 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4682 } 4683 4684 static struct ibm_struct wan_driver_data = { 4685 .name = "wan", 4686 .read = wan_read, 4687 .write = wan_write, 4688 .exit = wan_exit, 4689 .shutdown = wan_shutdown, 4690 }; 4691 4692 /************************************************************************* 4693 * UWB subdriver 4694 */ 4695 4696 enum { 4697 /* ACPI GUWB/SUWB bits */ 4698 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4699 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4700 }; 4701 4702 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4703 4704 static int uwb_get_status(void) 4705 { 4706 int status; 4707 4708 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4709 if (dbg_uwbemul) 4710 return (tpacpi_uwb_emulstate) ? 4711 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4712 #endif 4713 4714 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4715 return -EIO; 4716 4717 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4718 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4719 } 4720 4721 static int uwb_set_status(enum tpacpi_rfkill_state state) 4722 { 4723 int status; 4724 4725 vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s UWB\n", 4726 str_enable_disable(state == TPACPI_RFK_RADIO_ON)); 4727 4728 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4729 if (dbg_uwbemul) { 4730 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4731 return 0; 4732 } 4733 #endif 4734 4735 if (state == TPACPI_RFK_RADIO_ON) 4736 status = TP_ACPI_UWB_RADIOSSW; 4737 else 4738 status = 0; 4739 4740 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4741 return -EIO; 4742 4743 return 0; 4744 } 4745 4746 /* --------------------------------------------------------------------- */ 4747 4748 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4749 .get_status = uwb_get_status, 4750 .set_status = uwb_set_status, 4751 }; 4752 4753 static void uwb_exit(void) 4754 { 4755 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4756 } 4757 4758 static int __init uwb_init(struct ibm_init_struct *iibm) 4759 { 4760 int res; 4761 int status = 0; 4762 4763 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4764 "initializing uwb subdriver\n"); 4765 4766 TPACPI_ACPIHANDLE_INIT(hkey); 4767 4768 tp_features.uwb = hkey_handle && 4769 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4770 4771 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4772 "uwb is %s, status 0x%02x\n", 4773 str_supported(tp_features.uwb), 4774 status); 4775 4776 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4777 if (dbg_uwbemul) { 4778 tp_features.uwb = 1; 4779 pr_info("uwb switch emulation enabled\n"); 4780 } else 4781 #endif 4782 if (tp_features.uwb && 4783 !(status & TP_ACPI_UWB_HWPRESENT)) { 4784 /* no uwb hardware present in system */ 4785 tp_features.uwb = 0; 4786 dbg_printk(TPACPI_DBG_INIT, 4787 "uwb hardware not installed\n"); 4788 } 4789 4790 if (!tp_features.uwb) 4791 return -ENODEV; 4792 4793 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4794 &uwb_tprfk_ops, 4795 RFKILL_TYPE_UWB, 4796 TPACPI_RFK_UWB_SW_NAME, 4797 false); 4798 return res; 4799 } 4800 4801 static struct ibm_struct uwb_driver_data = { 4802 .name = "uwb", 4803 .exit = uwb_exit, 4804 .flags.experimental = 1, 4805 }; 4806 4807 /************************************************************************* 4808 * Video subdriver 4809 */ 4810 4811 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4812 4813 enum video_access_mode { 4814 TPACPI_VIDEO_NONE = 0, 4815 TPACPI_VIDEO_570, /* 570 */ 4816 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4817 TPACPI_VIDEO_NEW, /* all others */ 4818 }; 4819 4820 enum { /* video status flags, based on VIDEO_570 */ 4821 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4822 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4823 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4824 }; 4825 4826 enum { /* TPACPI_VIDEO_570 constants */ 4827 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4828 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4829 * video_status_flags */ 4830 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4831 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4832 }; 4833 4834 static enum video_access_mode video_supported; 4835 static int video_orig_autosw; 4836 4837 static int video_autosw_get(void); 4838 static int video_autosw_set(int enable); 4839 4840 TPACPI_HANDLE(vid, root, 4841 "\\_SB.PCI.AGP.VGA", /* 570 */ 4842 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4843 "\\_SB.PCI0.VID0", /* 770e */ 4844 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4845 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4846 "\\_SB.PCI0.AGP.VID", /* all others */ 4847 ); /* R30, R31 */ 4848 4849 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4850 4851 static int __init video_init(struct ibm_init_struct *iibm) 4852 { 4853 int ivga; 4854 4855 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4856 4857 TPACPI_ACPIHANDLE_INIT(vid); 4858 if (tpacpi_is_ibm()) 4859 TPACPI_ACPIHANDLE_INIT(vid2); 4860 4861 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4862 /* G41, assume IVGA doesn't change */ 4863 vid_handle = vid2_handle; 4864 4865 if (!vid_handle) 4866 /* video switching not supported on R30, R31 */ 4867 video_supported = TPACPI_VIDEO_NONE; 4868 else if (tpacpi_is_ibm() && 4869 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4870 /* 570 */ 4871 video_supported = TPACPI_VIDEO_570; 4872 else if (tpacpi_is_ibm() && 4873 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4874 /* 600e/x, 770e, 770x */ 4875 video_supported = TPACPI_VIDEO_770; 4876 else 4877 /* all others */ 4878 video_supported = TPACPI_VIDEO_NEW; 4879 4880 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4881 str_supported(video_supported != TPACPI_VIDEO_NONE), 4882 video_supported); 4883 4884 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : -ENODEV; 4885 } 4886 4887 static void video_exit(void) 4888 { 4889 dbg_printk(TPACPI_DBG_EXIT, 4890 "restoring original video autoswitch mode\n"); 4891 if (video_autosw_set(video_orig_autosw)) 4892 pr_err("error while trying to restore original video autoswitch mode\n"); 4893 } 4894 4895 static int video_outputsw_get(void) 4896 { 4897 int status = 0; 4898 int i; 4899 4900 switch (video_supported) { 4901 case TPACPI_VIDEO_570: 4902 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4903 TP_ACPI_VIDEO_570_PHSCMD)) 4904 return -EIO; 4905 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4906 break; 4907 case TPACPI_VIDEO_770: 4908 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4909 return -EIO; 4910 if (i) 4911 status |= TP_ACPI_VIDEO_S_LCD; 4912 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4913 return -EIO; 4914 if (i) 4915 status |= TP_ACPI_VIDEO_S_CRT; 4916 break; 4917 case TPACPI_VIDEO_NEW: 4918 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4919 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4920 return -EIO; 4921 if (i) 4922 status |= TP_ACPI_VIDEO_S_CRT; 4923 4924 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4925 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4926 return -EIO; 4927 if (i) 4928 status |= TP_ACPI_VIDEO_S_LCD; 4929 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4930 return -EIO; 4931 if (i) 4932 status |= TP_ACPI_VIDEO_S_DVI; 4933 break; 4934 default: 4935 return -ENOSYS; 4936 } 4937 4938 return status; 4939 } 4940 4941 static int video_outputsw_set(int status) 4942 { 4943 int autosw; 4944 int res = 0; 4945 4946 switch (video_supported) { 4947 case TPACPI_VIDEO_570: 4948 res = acpi_evalf(NULL, NULL, 4949 "\\_SB.PHS2", "vdd", 4950 TP_ACPI_VIDEO_570_PHS2CMD, 4951 status | TP_ACPI_VIDEO_570_PHS2SET); 4952 break; 4953 case TPACPI_VIDEO_770: 4954 autosw = video_autosw_get(); 4955 if (autosw < 0) 4956 return autosw; 4957 4958 res = video_autosw_set(1); 4959 if (res) 4960 return res; 4961 res = acpi_evalf(vid_handle, NULL, 4962 "ASWT", "vdd", status * 0x100, 0); 4963 if (!autosw && video_autosw_set(autosw)) { 4964 pr_err("video auto-switch left enabled due to error\n"); 4965 return -EIO; 4966 } 4967 break; 4968 case TPACPI_VIDEO_NEW: 4969 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4970 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4971 break; 4972 default: 4973 return -ENOSYS; 4974 } 4975 4976 return (res) ? 0 : -EIO; 4977 } 4978 4979 static int video_autosw_get(void) 4980 { 4981 int autosw = 0; 4982 4983 switch (video_supported) { 4984 case TPACPI_VIDEO_570: 4985 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4986 return -EIO; 4987 break; 4988 case TPACPI_VIDEO_770: 4989 case TPACPI_VIDEO_NEW: 4990 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4991 return -EIO; 4992 break; 4993 default: 4994 return -ENOSYS; 4995 } 4996 4997 return autosw & 1; 4998 } 4999 5000 static int video_autosw_set(int enable) 5001 { 5002 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 5003 return -EIO; 5004 return 0; 5005 } 5006 5007 static int video_outputsw_cycle(void) 5008 { 5009 int autosw = video_autosw_get(); 5010 int res; 5011 5012 if (autosw < 0) 5013 return autosw; 5014 5015 switch (video_supported) { 5016 case TPACPI_VIDEO_570: 5017 res = video_autosw_set(1); 5018 if (res) 5019 return res; 5020 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 5021 break; 5022 case TPACPI_VIDEO_770: 5023 case TPACPI_VIDEO_NEW: 5024 res = video_autosw_set(1); 5025 if (res) 5026 return res; 5027 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 5028 break; 5029 default: 5030 return -ENOSYS; 5031 } 5032 if (!autosw && video_autosw_set(autosw)) { 5033 pr_err("video auto-switch left enabled due to error\n"); 5034 return -EIO; 5035 } 5036 5037 return (res) ? 0 : -EIO; 5038 } 5039 5040 static int video_expand_toggle(void) 5041 { 5042 switch (video_supported) { 5043 case TPACPI_VIDEO_570: 5044 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 5045 0 : -EIO; 5046 case TPACPI_VIDEO_770: 5047 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 5048 0 : -EIO; 5049 case TPACPI_VIDEO_NEW: 5050 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 5051 0 : -EIO; 5052 default: 5053 return -ENOSYS; 5054 } 5055 /* not reached */ 5056 } 5057 5058 static int video_read(struct seq_file *m) 5059 { 5060 int status, autosw; 5061 5062 if (video_supported == TPACPI_VIDEO_NONE) { 5063 seq_printf(m, "status:\t\tnot supported\n"); 5064 return 0; 5065 } 5066 5067 /* Even reads can crash X.org, so... */ 5068 if (!capable(CAP_SYS_ADMIN)) 5069 return -EPERM; 5070 5071 status = video_outputsw_get(); 5072 if (status < 0) 5073 return status; 5074 5075 autosw = video_autosw_get(); 5076 if (autosw < 0) 5077 return autosw; 5078 5079 seq_printf(m, "status:\t\tsupported\n"); 5080 seq_printf(m, "lcd:\t\t%s\n", str_enabled_disabled(status & BIT(0))); 5081 seq_printf(m, "crt:\t\t%s\n", str_enabled_disabled(status & BIT(1))); 5082 if (video_supported == TPACPI_VIDEO_NEW) 5083 seq_printf(m, "dvi:\t\t%s\n", str_enabled_disabled(status & BIT(3))); 5084 seq_printf(m, "auto:\t\t%s\n", str_enabled_disabled(autosw & BIT(0))); 5085 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5086 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5087 if (video_supported == TPACPI_VIDEO_NEW) 5088 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5089 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5090 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5091 5092 return 0; 5093 } 5094 5095 static int video_write(char *buf) 5096 { 5097 char *cmd; 5098 int enable, disable, status; 5099 int res; 5100 5101 if (video_supported == TPACPI_VIDEO_NONE) 5102 return -ENODEV; 5103 5104 /* Even reads can crash X.org, let alone writes... */ 5105 if (!capable(CAP_SYS_ADMIN)) 5106 return -EPERM; 5107 5108 enable = 0; 5109 disable = 0; 5110 5111 while ((cmd = strsep(&buf, ","))) { 5112 if (strstarts(cmd, "lcd_enable")) { 5113 enable |= TP_ACPI_VIDEO_S_LCD; 5114 } else if (strstarts(cmd, "lcd_disable")) { 5115 disable |= TP_ACPI_VIDEO_S_LCD; 5116 } else if (strstarts(cmd, "crt_enable")) { 5117 enable |= TP_ACPI_VIDEO_S_CRT; 5118 } else if (strstarts(cmd, "crt_disable")) { 5119 disable |= TP_ACPI_VIDEO_S_CRT; 5120 } else if (video_supported == TPACPI_VIDEO_NEW && 5121 strstarts(cmd, "dvi_enable")) { 5122 enable |= TP_ACPI_VIDEO_S_DVI; 5123 } else if (video_supported == TPACPI_VIDEO_NEW && 5124 strstarts(cmd, "dvi_disable")) { 5125 disable |= TP_ACPI_VIDEO_S_DVI; 5126 } else if (strstarts(cmd, "auto_enable")) { 5127 res = video_autosw_set(1); 5128 if (res) 5129 return res; 5130 } else if (strstarts(cmd, "auto_disable")) { 5131 res = video_autosw_set(0); 5132 if (res) 5133 return res; 5134 } else if (strstarts(cmd, "video_switch")) { 5135 res = video_outputsw_cycle(); 5136 if (res) 5137 return res; 5138 } else if (strstarts(cmd, "expand_toggle")) { 5139 res = video_expand_toggle(); 5140 if (res) 5141 return res; 5142 } else 5143 return -EINVAL; 5144 } 5145 5146 if (enable || disable) { 5147 status = video_outputsw_get(); 5148 if (status < 0) 5149 return status; 5150 res = video_outputsw_set((status & ~disable) | enable); 5151 if (res) 5152 return res; 5153 } 5154 5155 return 0; 5156 } 5157 5158 static struct ibm_struct video_driver_data = { 5159 .name = "video", 5160 .read = video_read, 5161 .write = video_write, 5162 .exit = video_exit, 5163 }; 5164 5165 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5166 5167 /************************************************************************* 5168 * Keyboard backlight subdriver 5169 */ 5170 5171 static enum led_brightness kbdlight_brightness; 5172 static DEFINE_MUTEX(kbdlight_mutex); 5173 5174 static int kbdlight_set_level(int level) 5175 { 5176 int ret = 0; 5177 5178 if (!hkey_handle) 5179 return -ENXIO; 5180 5181 mutex_lock(&kbdlight_mutex); 5182 5183 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5184 ret = -EIO; 5185 else 5186 kbdlight_brightness = level; 5187 5188 mutex_unlock(&kbdlight_mutex); 5189 5190 return ret; 5191 } 5192 5193 static int kbdlight_get_level(void) 5194 { 5195 int status = 0; 5196 5197 if (!hkey_handle) 5198 return -ENXIO; 5199 5200 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5201 return -EIO; 5202 5203 if (status < 0) 5204 return status; 5205 5206 return status & 0x3; 5207 } 5208 5209 static bool kbdlight_is_supported(void) 5210 { 5211 int status = 0; 5212 5213 if (!hkey_handle) 5214 return false; 5215 5216 if (!acpi_has_method(hkey_handle, "MLCG")) { 5217 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5218 return false; 5219 } 5220 5221 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5222 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5223 return false; 5224 } 5225 5226 if (status < 0) { 5227 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5228 return false; 5229 } 5230 5231 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5232 /* 5233 * Guessed test for keyboard backlight: 5234 * 5235 * Machines with backlight keyboard return: 5236 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5237 * b110100010010000000XX - ThinkPad x230 5238 * b010100000010000000XX - ThinkPad x240 5239 * b010100000010000000XX - ThinkPad W541 5240 * (XX is current backlight level) 5241 * 5242 * Machines without backlight keyboard return: 5243 * b10100001000000000000 - ThinkPad x230 5244 * b10110001000000000000 - ThinkPad E430 5245 * b00000000000000000000 - ThinkPad E450 5246 * 5247 * Candidate BITs for detection test (XOR): 5248 * b01000000001000000000 5249 * ^ 5250 */ 5251 return status & BIT(9); 5252 } 5253 5254 static int kbdlight_sysfs_set(struct led_classdev *led_cdev, 5255 enum led_brightness brightness) 5256 { 5257 return kbdlight_set_level(brightness); 5258 } 5259 5260 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5261 { 5262 int level; 5263 5264 level = kbdlight_get_level(); 5265 if (level < 0) 5266 return 0; 5267 5268 return level; 5269 } 5270 5271 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5272 .led_classdev = { 5273 .name = "tpacpi::kbd_backlight", 5274 .max_brightness = 2, 5275 .flags = LED_BRIGHT_HW_CHANGED, 5276 .brightness_set_blocking = &kbdlight_sysfs_set, 5277 .brightness_get = &kbdlight_sysfs_get, 5278 } 5279 }; 5280 5281 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5282 { 5283 int rc; 5284 5285 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5286 5287 TPACPI_ACPIHANDLE_INIT(hkey); 5288 5289 if (!kbdlight_is_supported()) { 5290 tp_features.kbdlight = 0; 5291 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5292 return -ENODEV; 5293 } 5294 5295 kbdlight_brightness = kbdlight_sysfs_get(NULL); 5296 tp_features.kbdlight = 1; 5297 5298 rc = led_classdev_register(&tpacpi_pdev->dev, 5299 &tpacpi_led_kbdlight.led_classdev); 5300 if (rc < 0) { 5301 tp_features.kbdlight = 0; 5302 return rc; 5303 } 5304 5305 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask | 5306 TP_ACPI_HKEY_KBD_LIGHT_MASK); 5307 return 0; 5308 } 5309 5310 static void kbdlight_exit(void) 5311 { 5312 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5313 } 5314 5315 static int kbdlight_set_level_and_update(int level) 5316 { 5317 int ret; 5318 struct led_classdev *led_cdev; 5319 5320 ret = kbdlight_set_level(level); 5321 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5322 5323 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5324 led_cdev->brightness = level; 5325 5326 return ret; 5327 } 5328 5329 static int kbdlight_read(struct seq_file *m) 5330 { 5331 int level; 5332 5333 if (!tp_features.kbdlight) { 5334 seq_printf(m, "status:\t\tnot supported\n"); 5335 } else { 5336 level = kbdlight_get_level(); 5337 if (level < 0) 5338 seq_printf(m, "status:\t\terror %d\n", level); 5339 else 5340 seq_printf(m, "status:\t\t%d\n", level); 5341 seq_printf(m, "commands:\t0, 1, 2\n"); 5342 } 5343 5344 return 0; 5345 } 5346 5347 static int kbdlight_write(char *buf) 5348 { 5349 char *cmd; 5350 int res, level = -EINVAL; 5351 5352 if (!tp_features.kbdlight) 5353 return -ENODEV; 5354 5355 while ((cmd = strsep(&buf, ","))) { 5356 res = kstrtoint(cmd, 10, &level); 5357 if (res < 0) 5358 return res; 5359 } 5360 5361 if (level >= 3 || level < 0) 5362 return -EINVAL; 5363 5364 return kbdlight_set_level_and_update(level); 5365 } 5366 5367 static void kbdlight_suspend(void) 5368 { 5369 struct led_classdev *led_cdev; 5370 5371 if (!tp_features.kbdlight) 5372 return; 5373 5374 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5375 led_update_brightness(led_cdev); 5376 led_classdev_suspend(led_cdev); 5377 } 5378 5379 static void kbdlight_resume(void) 5380 { 5381 if (!tp_features.kbdlight) 5382 return; 5383 5384 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5385 } 5386 5387 static struct ibm_struct kbdlight_driver_data = { 5388 .name = "kbdlight", 5389 .read = kbdlight_read, 5390 .write = kbdlight_write, 5391 .suspend = kbdlight_suspend, 5392 .resume = kbdlight_resume, 5393 .exit = kbdlight_exit, 5394 }; 5395 5396 /************************************************************************* 5397 * Light (thinklight) subdriver 5398 */ 5399 5400 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5401 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5402 5403 static int light_get_status(void) 5404 { 5405 int status = 0; 5406 5407 if (tp_features.light_status) { 5408 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5409 return -EIO; 5410 return (!!status); 5411 } 5412 5413 return -ENXIO; 5414 } 5415 5416 static int light_set_status(int status) 5417 { 5418 int rc; 5419 5420 if (tp_features.light) { 5421 if (cmos_handle) { 5422 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5423 (status) ? 5424 TP_CMOS_THINKLIGHT_ON : 5425 TP_CMOS_THINKLIGHT_OFF); 5426 } else { 5427 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5428 (status) ? 1 : 0); 5429 } 5430 return (rc) ? 0 : -EIO; 5431 } 5432 5433 return -ENXIO; 5434 } 5435 5436 static int light_sysfs_set(struct led_classdev *led_cdev, 5437 enum led_brightness brightness) 5438 { 5439 return light_set_status((brightness != LED_OFF) ? 5440 TPACPI_LED_ON : TPACPI_LED_OFF); 5441 } 5442 5443 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5444 { 5445 return (light_get_status() == 1) ? LED_ON : LED_OFF; 5446 } 5447 5448 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5449 .led_classdev = { 5450 .name = "tpacpi::thinklight", 5451 .max_brightness = 1, 5452 .brightness_set_blocking = &light_sysfs_set, 5453 .brightness_get = &light_sysfs_get, 5454 } 5455 }; 5456 5457 static int __init light_init(struct ibm_init_struct *iibm) 5458 { 5459 int rc; 5460 5461 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5462 5463 if (tpacpi_is_ibm()) { 5464 TPACPI_ACPIHANDLE_INIT(ledb); 5465 TPACPI_ACPIHANDLE_INIT(lght); 5466 } 5467 TPACPI_ACPIHANDLE_INIT(cmos); 5468 5469 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5470 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5471 5472 if (tp_features.light) 5473 /* light status not supported on 5474 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5475 tp_features.light_status = 5476 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5477 5478 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5479 str_supported(tp_features.light), 5480 str_supported(tp_features.light_status)); 5481 5482 if (!tp_features.light) 5483 return -ENODEV; 5484 5485 rc = led_classdev_register(&tpacpi_pdev->dev, 5486 &tpacpi_led_thinklight.led_classdev); 5487 5488 if (rc < 0) { 5489 tp_features.light = 0; 5490 tp_features.light_status = 0; 5491 } else { 5492 rc = 0; 5493 } 5494 5495 return rc; 5496 } 5497 5498 static void light_exit(void) 5499 { 5500 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5501 } 5502 5503 static int light_read(struct seq_file *m) 5504 { 5505 int status; 5506 5507 if (!tp_features.light) { 5508 seq_printf(m, "status:\t\tnot supported\n"); 5509 } else if (!tp_features.light_status) { 5510 seq_printf(m, "status:\t\tunknown\n"); 5511 seq_printf(m, "commands:\ton, off\n"); 5512 } else { 5513 status = light_get_status(); 5514 if (status < 0) 5515 return status; 5516 seq_printf(m, "status:\t\t%s\n", str_on_off(status & BIT(0))); 5517 seq_printf(m, "commands:\ton, off\n"); 5518 } 5519 5520 return 0; 5521 } 5522 5523 static int light_write(char *buf) 5524 { 5525 char *cmd; 5526 int newstatus = 0; 5527 5528 if (!tp_features.light) 5529 return -ENODEV; 5530 5531 while ((cmd = strsep(&buf, ","))) { 5532 if (strstarts(cmd, "on")) { 5533 newstatus = 1; 5534 } else if (strstarts(cmd, "off")) { 5535 newstatus = 0; 5536 } else 5537 return -EINVAL; 5538 } 5539 5540 return light_set_status(newstatus); 5541 } 5542 5543 static struct ibm_struct light_driver_data = { 5544 .name = "light", 5545 .read = light_read, 5546 .write = light_write, 5547 .exit = light_exit, 5548 }; 5549 5550 /************************************************************************* 5551 * CMOS subdriver 5552 */ 5553 5554 /* sysfs cmos_command -------------------------------------------------- */ 5555 static ssize_t cmos_command_store(struct device *dev, 5556 struct device_attribute *attr, 5557 const char *buf, size_t count) 5558 { 5559 unsigned long cmos_cmd; 5560 int res; 5561 5562 if (parse_strtoul(buf, 21, &cmos_cmd)) 5563 return -EINVAL; 5564 5565 res = issue_thinkpad_cmos_command(cmos_cmd); 5566 return (res) ? res : count; 5567 } 5568 5569 static DEVICE_ATTR_WO(cmos_command); 5570 5571 static struct attribute *cmos_attributes[] = { 5572 &dev_attr_cmos_command.attr, 5573 NULL 5574 }; 5575 5576 static umode_t cmos_attr_is_visible(struct kobject *kobj, 5577 struct attribute *attr, int n) 5578 { 5579 return cmos_handle ? attr->mode : 0; 5580 } 5581 5582 static const struct attribute_group cmos_attr_group = { 5583 .is_visible = cmos_attr_is_visible, 5584 .attrs = cmos_attributes, 5585 }; 5586 5587 /* --------------------------------------------------------------------- */ 5588 5589 static int __init cmos_init(struct ibm_init_struct *iibm) 5590 { 5591 vdbg_printk(TPACPI_DBG_INIT, 5592 "initializing cmos commands subdriver\n"); 5593 5594 TPACPI_ACPIHANDLE_INIT(cmos); 5595 5596 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5597 str_supported(cmos_handle != NULL)); 5598 5599 return cmos_handle ? 0 : -ENODEV; 5600 } 5601 5602 static int cmos_read(struct seq_file *m) 5603 { 5604 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5605 R30, R31, T20-22, X20-21 */ 5606 if (!cmos_handle) 5607 seq_printf(m, "status:\t\tnot supported\n"); 5608 else { 5609 seq_printf(m, "status:\t\tsupported\n"); 5610 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5611 } 5612 5613 return 0; 5614 } 5615 5616 static int cmos_write(char *buf) 5617 { 5618 char *cmd; 5619 int cmos_cmd, res; 5620 5621 while ((cmd = strsep(&buf, ","))) { 5622 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5623 cmos_cmd >= 0 && cmos_cmd <= 21) { 5624 /* cmos_cmd set */ 5625 } else 5626 return -EINVAL; 5627 5628 res = issue_thinkpad_cmos_command(cmos_cmd); 5629 if (res) 5630 return res; 5631 } 5632 5633 return 0; 5634 } 5635 5636 static struct ibm_struct cmos_driver_data = { 5637 .name = "cmos", 5638 .read = cmos_read, 5639 .write = cmos_write, 5640 }; 5641 5642 /************************************************************************* 5643 * LED subdriver 5644 */ 5645 5646 enum led_access_mode { 5647 TPACPI_LED_NONE = 0, 5648 TPACPI_LED_570, /* 570 */ 5649 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5650 TPACPI_LED_NEW, /* all others */ 5651 }; 5652 5653 enum { /* For TPACPI_LED_OLD */ 5654 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5655 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5656 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5657 }; 5658 5659 static enum led_access_mode led_supported; 5660 5661 static acpi_handle led_handle; 5662 5663 #define TPACPI_LED_NUMLEDS 16 5664 static struct tpacpi_led_classdev *tpacpi_leds; 5665 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5666 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5667 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5668 "tpacpi::power", 5669 "tpacpi:orange:batt", 5670 "tpacpi:green:batt", 5671 "tpacpi::dock_active", 5672 "tpacpi::bay_active", 5673 "tpacpi::dock_batt", 5674 "tpacpi::unknown_led", 5675 "tpacpi::standby", 5676 "tpacpi::dock_status1", 5677 "tpacpi::dock_status2", 5678 "tpacpi::lid_logo_dot", 5679 "tpacpi::unknown_led3", 5680 "tpacpi::thinkvantage", 5681 }; 5682 #define TPACPI_SAFE_LEDS 0x1481U 5683 5684 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5685 { 5686 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5687 return false; 5688 #else 5689 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5690 #endif 5691 } 5692 5693 static int led_get_status(const unsigned int led) 5694 { 5695 int status; 5696 enum led_status_t led_s; 5697 5698 switch (led_supported) { 5699 case TPACPI_LED_570: 5700 if (!acpi_evalf(ec_handle, 5701 &status, "GLED", "dd", 1 << led)) 5702 return -EIO; 5703 led_s = (status == 0) ? 5704 TPACPI_LED_OFF : 5705 ((status == 1) ? 5706 TPACPI_LED_ON : 5707 TPACPI_LED_BLINK); 5708 tpacpi_led_state_cache[led] = led_s; 5709 return led_s; 5710 default: 5711 return -ENXIO; 5712 } 5713 5714 /* not reached */ 5715 } 5716 5717 static int led_set_status(const unsigned int led, 5718 const enum led_status_t ledstatus) 5719 { 5720 /* off, on, blink. Index is led_status_t */ 5721 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5722 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5723 5724 int rc = 0; 5725 5726 switch (led_supported) { 5727 case TPACPI_LED_570: 5728 /* 570 */ 5729 if (unlikely(led > 7)) 5730 return -EINVAL; 5731 if (unlikely(tpacpi_is_led_restricted(led))) 5732 return -EPERM; 5733 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5734 (1 << led), led_sled_arg1[ledstatus])) 5735 return -EIO; 5736 break; 5737 case TPACPI_LED_OLD: 5738 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5739 if (unlikely(led > 7)) 5740 return -EINVAL; 5741 if (unlikely(tpacpi_is_led_restricted(led))) 5742 return -EPERM; 5743 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5744 if (rc >= 0) 5745 rc = ec_write(TPACPI_LED_EC_HLBL, 5746 (ledstatus == TPACPI_LED_BLINK) << led); 5747 if (rc >= 0) 5748 rc = ec_write(TPACPI_LED_EC_HLCL, 5749 (ledstatus != TPACPI_LED_OFF) << led); 5750 break; 5751 case TPACPI_LED_NEW: 5752 /* all others */ 5753 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5754 return -EINVAL; 5755 if (unlikely(tpacpi_is_led_restricted(led))) 5756 return -EPERM; 5757 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5758 led, led_led_arg1[ledstatus])) 5759 return -EIO; 5760 break; 5761 default: 5762 return -ENXIO; 5763 } 5764 5765 if (!rc) 5766 tpacpi_led_state_cache[led] = ledstatus; 5767 5768 return rc; 5769 } 5770 5771 static int led_sysfs_set(struct led_classdev *led_cdev, 5772 enum led_brightness brightness) 5773 { 5774 struct tpacpi_led_classdev *data = container_of(led_cdev, 5775 struct tpacpi_led_classdev, led_classdev); 5776 enum led_status_t new_state; 5777 5778 if (brightness == LED_OFF) 5779 new_state = TPACPI_LED_OFF; 5780 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5781 new_state = TPACPI_LED_ON; 5782 else 5783 new_state = TPACPI_LED_BLINK; 5784 5785 return led_set_status(data->led, new_state); 5786 } 5787 5788 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5789 unsigned long *delay_on, unsigned long *delay_off) 5790 { 5791 struct tpacpi_led_classdev *data = container_of(led_cdev, 5792 struct tpacpi_led_classdev, led_classdev); 5793 5794 /* Can we choose the flash rate? */ 5795 if (*delay_on == 0 && *delay_off == 0) { 5796 /* yes. set them to the hardware blink rate (1 Hz) */ 5797 *delay_on = 500; /* ms */ 5798 *delay_off = 500; /* ms */ 5799 } else if ((*delay_on != 500) || (*delay_off != 500)) 5800 return -EINVAL; 5801 5802 return led_set_status(data->led, TPACPI_LED_BLINK); 5803 } 5804 5805 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5806 { 5807 int rc; 5808 5809 struct tpacpi_led_classdev *data = container_of(led_cdev, 5810 struct tpacpi_led_classdev, led_classdev); 5811 5812 rc = led_get_status(data->led); 5813 5814 if (rc == TPACPI_LED_OFF || rc < 0) 5815 rc = LED_OFF; /* no error handling in led class :( */ 5816 else 5817 rc = LED_FULL; 5818 5819 return rc; 5820 } 5821 5822 static void led_exit(void) 5823 { 5824 unsigned int i; 5825 5826 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) 5827 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5828 5829 kfree(tpacpi_leds); 5830 } 5831 5832 static int __init tpacpi_init_led(unsigned int led) 5833 { 5834 /* LEDs with no name don't get registered */ 5835 if (!tpacpi_led_names[led]) 5836 return 0; 5837 5838 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set; 5839 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5840 if (led_supported == TPACPI_LED_570) 5841 tpacpi_leds[led].led_classdev.brightness_get = &led_sysfs_get; 5842 5843 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5844 tpacpi_leds[led].led_classdev.flags = LED_RETAIN_AT_SHUTDOWN; 5845 tpacpi_leds[led].led = led; 5846 5847 return led_classdev_register(&tpacpi_pdev->dev, &tpacpi_leds[led].led_classdev); 5848 } 5849 5850 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5851 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5852 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5853 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5854 5855 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5856 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5857 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5858 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5859 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5860 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5861 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5862 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5863 5864 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5865 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5866 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5867 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5868 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5869 5870 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5871 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5872 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5873 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5874 5875 /* (1) - may have excess leds enabled on MSB */ 5876 5877 /* Defaults (order matters, keep last, don't reorder!) */ 5878 { /* Lenovo */ 5879 .vendor = PCI_VENDOR_ID_LENOVO, 5880 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5881 .quirks = 0x1fffU, 5882 }, 5883 { /* IBM ThinkPads with no EC version string */ 5884 .vendor = PCI_VENDOR_ID_IBM, 5885 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5886 .quirks = 0x00ffU, 5887 }, 5888 { /* IBM ThinkPads with EC version string */ 5889 .vendor = PCI_VENDOR_ID_IBM, 5890 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5891 .quirks = 0x00bfU, 5892 }, 5893 }; 5894 5895 static enum led_access_mode __init led_init_detect_mode(void) 5896 { 5897 acpi_status status; 5898 5899 if (tpacpi_is_ibm()) { 5900 /* 570 */ 5901 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5902 if (ACPI_SUCCESS(status)) 5903 return TPACPI_LED_570; 5904 5905 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5906 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5907 if (ACPI_SUCCESS(status)) 5908 return TPACPI_LED_OLD; 5909 } 5910 5911 /* most others */ 5912 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5913 if (ACPI_SUCCESS(status)) 5914 return TPACPI_LED_NEW; 5915 5916 /* R30, R31, and unknown firmwares */ 5917 led_handle = NULL; 5918 return TPACPI_LED_NONE; 5919 } 5920 5921 static int __init led_init(struct ibm_init_struct *iibm) 5922 { 5923 unsigned int i; 5924 int rc; 5925 unsigned long useful_leds; 5926 5927 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5928 5929 led_supported = led_init_detect_mode(); 5930 5931 if (led_supported != TPACPI_LED_NONE) { 5932 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5933 ARRAY_SIZE(led_useful_qtable)); 5934 5935 if (!useful_leds) { 5936 led_handle = NULL; 5937 led_supported = TPACPI_LED_NONE; 5938 } 5939 } 5940 5941 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5942 str_supported(led_supported), led_supported); 5943 5944 if (led_supported == TPACPI_LED_NONE) 5945 return -ENODEV; 5946 5947 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds), 5948 GFP_KERNEL); 5949 if (!tpacpi_leds) { 5950 pr_err("Out of memory for LED data\n"); 5951 return -ENOMEM; 5952 } 5953 5954 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5955 tpacpi_leds[i].led = -1; 5956 5957 if (!tpacpi_is_led_restricted(i) && test_bit(i, &useful_leds)) { 5958 rc = tpacpi_init_led(i); 5959 if (rc < 0) { 5960 led_exit(); 5961 return rc; 5962 } 5963 } 5964 } 5965 5966 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5967 pr_notice("warning: userspace override of important firmware LEDs is enabled\n"); 5968 #endif 5969 return 0; 5970 } 5971 5972 #define str_led_status(s) ((s) >= TPACPI_LED_BLINK ? "blinking" : str_on_off(s)) 5973 5974 static int led_read(struct seq_file *m) 5975 { 5976 if (!led_supported) { 5977 seq_printf(m, "status:\t\tnot supported\n"); 5978 return 0; 5979 } 5980 seq_printf(m, "status:\t\tsupported\n"); 5981 5982 if (led_supported == TPACPI_LED_570) { 5983 /* 570 */ 5984 int i, status; 5985 for (i = 0; i < 8; i++) { 5986 status = led_get_status(i); 5987 if (status < 0) 5988 return -EIO; 5989 seq_printf(m, "%d:\t\t%s\n", i, str_led_status(status)); 5990 } 5991 } 5992 5993 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5994 5995 return 0; 5996 } 5997 5998 static int led_write(char *buf) 5999 { 6000 char *cmd; 6001 int led, rc; 6002 enum led_status_t s; 6003 6004 if (!led_supported) 6005 return -ENODEV; 6006 6007 while ((cmd = strsep(&buf, ","))) { 6008 if (sscanf(cmd, "%d", &led) != 1) 6009 return -EINVAL; 6010 6011 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1)) 6012 return -ENODEV; 6013 6014 if (tpacpi_leds[led].led < 0) 6015 return -ENODEV; 6016 6017 if (strstr(cmd, "off")) { 6018 s = TPACPI_LED_OFF; 6019 } else if (strstr(cmd, "on")) { 6020 s = TPACPI_LED_ON; 6021 } else if (strstr(cmd, "blink")) { 6022 s = TPACPI_LED_BLINK; 6023 } else { 6024 return -EINVAL; 6025 } 6026 6027 rc = led_set_status(led, s); 6028 if (rc < 0) 6029 return rc; 6030 } 6031 6032 return 0; 6033 } 6034 6035 static struct ibm_struct led_driver_data = { 6036 .name = "led", 6037 .read = led_read, 6038 .write = led_write, 6039 .exit = led_exit, 6040 }; 6041 6042 /************************************************************************* 6043 * Beep subdriver 6044 */ 6045 6046 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 6047 6048 #define TPACPI_BEEP_Q1 0x0001 6049 6050 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 6051 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 6052 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 6053 }; 6054 6055 static int __init beep_init(struct ibm_init_struct *iibm) 6056 { 6057 unsigned long quirks; 6058 6059 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 6060 6061 TPACPI_ACPIHANDLE_INIT(beep); 6062 6063 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 6064 str_supported(beep_handle != NULL)); 6065 6066 quirks = tpacpi_check_quirks(beep_quirk_table, 6067 ARRAY_SIZE(beep_quirk_table)); 6068 6069 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6070 6071 return (beep_handle) ? 0 : -ENODEV; 6072 } 6073 6074 static int beep_read(struct seq_file *m) 6075 { 6076 if (!beep_handle) 6077 seq_printf(m, "status:\t\tnot supported\n"); 6078 else { 6079 seq_printf(m, "status:\t\tsupported\n"); 6080 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6081 } 6082 6083 return 0; 6084 } 6085 6086 static int beep_write(char *buf) 6087 { 6088 char *cmd; 6089 int beep_cmd; 6090 6091 if (!beep_handle) 6092 return -ENODEV; 6093 6094 while ((cmd = strsep(&buf, ","))) { 6095 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6096 beep_cmd >= 0 && beep_cmd <= 17) { 6097 /* beep_cmd set */ 6098 } else 6099 return -EINVAL; 6100 if (tp_features.beep_needs_two_args) { 6101 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6102 beep_cmd, 0)) 6103 return -EIO; 6104 } else { 6105 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6106 beep_cmd)) 6107 return -EIO; 6108 } 6109 } 6110 6111 return 0; 6112 } 6113 6114 static struct ibm_struct beep_driver_data = { 6115 .name = "beep", 6116 .read = beep_read, 6117 .write = beep_write, 6118 }; 6119 6120 /************************************************************************* 6121 * Thermal subdriver 6122 */ 6123 6124 enum thermal_access_mode { 6125 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6126 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6127 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6128 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6129 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6130 }; 6131 6132 enum { /* TPACPI_THERMAL_TPEC_* */ 6133 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6134 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6135 TP_EC_FUNCREV = 0xEF, /* ACPI EC Functional revision */ 6136 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6137 6138 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6139 }; 6140 6141 6142 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6143 struct ibm_thermal_sensors_struct { 6144 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6145 }; 6146 6147 static enum thermal_access_mode thermal_read_mode; 6148 static bool thermal_use_labels; 6149 6150 /* idx is zero-based */ 6151 static int thermal_get_sensor(int idx, s32 *value) 6152 { 6153 int t; 6154 s8 tmp; 6155 char tmpi[5]; 6156 6157 t = TP_EC_THERMAL_TMP0; 6158 6159 switch (thermal_read_mode) { 6160 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6161 case TPACPI_THERMAL_TPEC_16: 6162 if (idx >= 8 && idx <= 15) { 6163 t = TP_EC_THERMAL_TMP8; 6164 idx -= 8; 6165 } 6166 #endif 6167 fallthrough; 6168 case TPACPI_THERMAL_TPEC_8: 6169 if (idx <= 7) { 6170 if (!acpi_ec_read(t + idx, &tmp)) 6171 return -EIO; 6172 *value = tmp * 1000; 6173 return 0; 6174 } 6175 break; 6176 6177 case TPACPI_THERMAL_ACPI_UPDT: 6178 if (idx <= 7) { 6179 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6180 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6181 return -EIO; 6182 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6183 return -EIO; 6184 *value = (t - 2732) * 100; 6185 return 0; 6186 } 6187 break; 6188 6189 case TPACPI_THERMAL_ACPI_TMP07: 6190 if (idx <= 7) { 6191 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6192 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6193 return -EIO; 6194 if (t > 127 || t < -127) 6195 t = TP_EC_THERMAL_TMP_NA; 6196 *value = t * 1000; 6197 return 0; 6198 } 6199 break; 6200 6201 case TPACPI_THERMAL_NONE: 6202 default: 6203 return -ENOSYS; 6204 } 6205 6206 return -EINVAL; 6207 } 6208 6209 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6210 { 6211 int res, i; 6212 int n; 6213 6214 n = 8; 6215 i = 0; 6216 6217 if (!s) 6218 return -EINVAL; 6219 6220 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6221 n = 16; 6222 6223 for (i = 0 ; i < n; i++) { 6224 res = thermal_get_sensor(i, &s->temp[i]); 6225 if (res) 6226 return res; 6227 } 6228 6229 return n; 6230 } 6231 6232 static void thermal_dump_all_sensors(void) 6233 { 6234 int n, i; 6235 struct ibm_thermal_sensors_struct t; 6236 6237 n = thermal_get_sensors(&t); 6238 if (n <= 0) 6239 return; 6240 6241 pr_notice("temperatures (Celsius):"); 6242 6243 for (i = 0; i < n; i++) { 6244 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6245 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6246 else 6247 pr_cont(" N/A"); 6248 } 6249 6250 pr_cont("\n"); 6251 } 6252 6253 /* sysfs temp##_input -------------------------------------------------- */ 6254 6255 static ssize_t thermal_temp_input_show(struct device *dev, 6256 struct device_attribute *attr, 6257 char *buf) 6258 { 6259 struct sensor_device_attribute *sensor_attr = 6260 to_sensor_dev_attr(attr); 6261 int idx = sensor_attr->index; 6262 s32 value; 6263 int res; 6264 6265 res = thermal_get_sensor(idx, &value); 6266 if (res) 6267 return res; 6268 if (value == TPACPI_THERMAL_SENSOR_NA) 6269 return -ENXIO; 6270 6271 return sysfs_emit(buf, "%d\n", value); 6272 } 6273 6274 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6275 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6276 thermal_temp_input_show, NULL, _idxB) 6277 6278 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6279 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6280 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6281 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6282 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6283 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6284 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6285 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6286 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6287 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6288 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6289 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6290 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6291 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6292 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6293 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6294 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6295 }; 6296 6297 #define THERMAL_ATTRS(X) \ 6298 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6299 6300 static struct attribute *thermal_temp_input_attr[] = { 6301 THERMAL_ATTRS(0), 6302 THERMAL_ATTRS(1), 6303 THERMAL_ATTRS(2), 6304 THERMAL_ATTRS(3), 6305 THERMAL_ATTRS(4), 6306 THERMAL_ATTRS(5), 6307 THERMAL_ATTRS(6), 6308 THERMAL_ATTRS(7), 6309 THERMAL_ATTRS(8), 6310 THERMAL_ATTRS(9), 6311 THERMAL_ATTRS(10), 6312 THERMAL_ATTRS(11), 6313 THERMAL_ATTRS(12), 6314 THERMAL_ATTRS(13), 6315 THERMAL_ATTRS(14), 6316 THERMAL_ATTRS(15), 6317 NULL 6318 }; 6319 6320 static umode_t thermal_attr_is_visible(struct kobject *kobj, 6321 struct attribute *attr, int n) 6322 { 6323 if (thermal_read_mode == TPACPI_THERMAL_NONE) 6324 return 0; 6325 6326 if (attr == THERMAL_ATTRS(8) || attr == THERMAL_ATTRS(9) || 6327 attr == THERMAL_ATTRS(10) || attr == THERMAL_ATTRS(11) || 6328 attr == THERMAL_ATTRS(12) || attr == THERMAL_ATTRS(13) || 6329 attr == THERMAL_ATTRS(14) || attr == THERMAL_ATTRS(15)) { 6330 if (thermal_read_mode != TPACPI_THERMAL_TPEC_16) 6331 return 0; 6332 } 6333 6334 return attr->mode; 6335 } 6336 6337 static const struct attribute_group thermal_attr_group = { 6338 .is_visible = thermal_attr_is_visible, 6339 .attrs = thermal_temp_input_attr, 6340 }; 6341 6342 #undef THERMAL_SENSOR_ATTR_TEMP 6343 #undef THERMAL_ATTRS 6344 6345 static ssize_t temp1_label_show(struct device *dev, struct device_attribute *attr, char *buf) 6346 { 6347 return sysfs_emit(buf, "CPU\n"); 6348 } 6349 static DEVICE_ATTR_RO(temp1_label); 6350 6351 static ssize_t temp2_label_show(struct device *dev, struct device_attribute *attr, char *buf) 6352 { 6353 return sysfs_emit(buf, "GPU\n"); 6354 } 6355 static DEVICE_ATTR_RO(temp2_label); 6356 6357 static struct attribute *temp_label_attributes[] = { 6358 &dev_attr_temp1_label.attr, 6359 &dev_attr_temp2_label.attr, 6360 NULL 6361 }; 6362 6363 static umode_t temp_label_attr_is_visible(struct kobject *kobj, 6364 struct attribute *attr, int n) 6365 { 6366 return thermal_use_labels ? attr->mode : 0; 6367 } 6368 6369 static const struct attribute_group temp_label_attr_group = { 6370 .is_visible = temp_label_attr_is_visible, 6371 .attrs = temp_label_attributes, 6372 }; 6373 6374 /* --------------------------------------------------------------------- */ 6375 6376 static int __init thermal_init(struct ibm_init_struct *iibm) 6377 { 6378 u8 t, ta1, ta2, ver = 0; 6379 int i; 6380 int acpi_tmp7; 6381 6382 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6383 6384 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6385 6386 if (thinkpad_id.ec_model) { 6387 /* 6388 * Direct EC access mode: sensors at registers 6389 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6390 * non-implemented, thermal sensors return 0x80 when 6391 * not available 6392 * The above rule is unfortunately flawed. This has been seen with 6393 * 0xC2 (power supply ID) causing thermal control problems. 6394 * The EC version can be determined by offset 0xEF and at least for 6395 * version 3 the Lenovo firmware team confirmed that registers 0xC0-0xC7 6396 * are not thermal registers. 6397 */ 6398 if (!acpi_ec_read(TP_EC_FUNCREV, &ver)) 6399 pr_warn("Thinkpad ACPI EC unable to access EC version\n"); 6400 6401 ta1 = ta2 = 0; 6402 for (i = 0; i < 8; i++) { 6403 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6404 ta1 |= t; 6405 } else { 6406 ta1 = 0; 6407 break; 6408 } 6409 if (ver < 3) { 6410 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6411 ta2 |= t; 6412 } else { 6413 ta1 = 0; 6414 break; 6415 } 6416 } 6417 } 6418 if (ta1 == 0) { 6419 /* This is sheer paranoia, but we handle it anyway */ 6420 if (acpi_tmp7) { 6421 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n"); 6422 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6423 } else { 6424 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n"); 6425 thermal_read_mode = TPACPI_THERMAL_NONE; 6426 } 6427 } else { 6428 if (ver >= 3) { 6429 thermal_read_mode = TPACPI_THERMAL_TPEC_8; 6430 thermal_use_labels = true; 6431 } else { 6432 thermal_read_mode = 6433 (ta2 != 0) ? 6434 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6435 } 6436 } 6437 } else if (acpi_tmp7) { 6438 if (tpacpi_is_ibm() && 6439 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6440 /* 600e/x, 770e, 770x */ 6441 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6442 } else { 6443 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6444 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6445 } 6446 } else { 6447 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6448 thermal_read_mode = TPACPI_THERMAL_NONE; 6449 } 6450 6451 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6452 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6453 thermal_read_mode); 6454 6455 return thermal_read_mode != TPACPI_THERMAL_NONE ? 0 : -ENODEV; 6456 } 6457 6458 static int thermal_read(struct seq_file *m) 6459 { 6460 int n, i; 6461 struct ibm_thermal_sensors_struct t; 6462 6463 n = thermal_get_sensors(&t); 6464 if (unlikely(n < 0)) 6465 return n; 6466 6467 seq_printf(m, "temperatures:\t"); 6468 6469 if (n > 0) { 6470 for (i = 0; i < (n - 1); i++) 6471 seq_printf(m, "%d ", t.temp[i] / 1000); 6472 seq_printf(m, "%d\n", t.temp[i] / 1000); 6473 } else 6474 seq_printf(m, "not supported\n"); 6475 6476 return 0; 6477 } 6478 6479 static struct ibm_struct thermal_driver_data = { 6480 .name = "thermal", 6481 .read = thermal_read, 6482 }; 6483 6484 /************************************************************************* 6485 * Backlight/brightness subdriver 6486 */ 6487 6488 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6489 6490 /* 6491 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6492 * CMOS NVRAM byte 0x5E, bits 0-3. 6493 * 6494 * EC HBRV (0x31) has the following layout 6495 * Bit 7: unknown function 6496 * Bit 6: unknown function 6497 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6498 * Bit 4: must be set to zero to avoid problems 6499 * Bit 3-0: backlight brightness level 6500 * 6501 * brightness_get_raw returns status data in the HBRV layout 6502 * 6503 * WARNING: The X61 has been verified to use HBRV for something else, so 6504 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6505 * testing on the very early *60 Lenovo models... 6506 */ 6507 6508 enum { 6509 TP_EC_BACKLIGHT = 0x31, 6510 6511 /* TP_EC_BACKLIGHT bitmasks */ 6512 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6513 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6514 TP_EC_BACKLIGHT_MAPSW = 0x20, 6515 }; 6516 6517 enum tpacpi_brightness_access_mode { 6518 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6519 TPACPI_BRGHT_MODE_EC, /* EC control */ 6520 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6521 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6522 TPACPI_BRGHT_MODE_MAX 6523 }; 6524 6525 static struct backlight_device *ibm_backlight_device; 6526 6527 static enum tpacpi_brightness_access_mode brightness_mode = 6528 TPACPI_BRGHT_MODE_MAX; 6529 6530 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6531 6532 static struct mutex brightness_mutex; 6533 6534 /* NVRAM brightness access */ 6535 static unsigned int tpacpi_brightness_nvram_get(void) 6536 { 6537 u8 lnvram; 6538 6539 lockdep_assert_held(&brightness_mutex); 6540 6541 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6542 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6543 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6544 lnvram &= bright_maxlvl; 6545 6546 return lnvram; 6547 } 6548 6549 static void tpacpi_brightness_checkpoint_nvram(void) 6550 { 6551 u8 lec = 0; 6552 u8 b_nvram; 6553 6554 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6555 return; 6556 6557 vdbg_printk(TPACPI_DBG_BRGHT, 6558 "trying to checkpoint backlight level to NVRAM...\n"); 6559 6560 if (mutex_lock_killable(&brightness_mutex) < 0) 6561 return; 6562 6563 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6564 goto unlock; 6565 lec &= TP_EC_BACKLIGHT_LVLMSK; 6566 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6567 6568 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6569 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6570 /* NVRAM needs update */ 6571 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6572 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6573 b_nvram |= lec; 6574 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6575 dbg_printk(TPACPI_DBG_BRGHT, 6576 "updated NVRAM backlight level to %u (0x%02x)\n", 6577 (unsigned int) lec, (unsigned int) b_nvram); 6578 } else 6579 vdbg_printk(TPACPI_DBG_BRGHT, 6580 "NVRAM backlight level already is %u (0x%02x)\n", 6581 (unsigned int) lec, (unsigned int) b_nvram); 6582 6583 unlock: 6584 mutex_unlock(&brightness_mutex); 6585 } 6586 6587 6588 static int tpacpi_brightness_get_raw(int *status) 6589 { 6590 u8 lec = 0; 6591 6592 lockdep_assert_held(&brightness_mutex); 6593 6594 switch (brightness_mode) { 6595 case TPACPI_BRGHT_MODE_UCMS_STEP: 6596 *status = tpacpi_brightness_nvram_get(); 6597 return 0; 6598 case TPACPI_BRGHT_MODE_EC: 6599 case TPACPI_BRGHT_MODE_ECNVRAM: 6600 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6601 return -EIO; 6602 *status = lec; 6603 return 0; 6604 default: 6605 return -ENXIO; 6606 } 6607 } 6608 6609 /* do NOT call with illegal backlight level value */ 6610 static int tpacpi_brightness_set_ec(unsigned int value) 6611 { 6612 u8 lec = 0; 6613 6614 lockdep_assert_held(&brightness_mutex); 6615 6616 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6617 return -EIO; 6618 6619 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6620 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6621 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6622 return -EIO; 6623 6624 return 0; 6625 } 6626 6627 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6628 { 6629 int cmos_cmd, inc; 6630 unsigned int current_value, i; 6631 6632 lockdep_assert_held(&brightness_mutex); 6633 6634 current_value = tpacpi_brightness_nvram_get(); 6635 6636 if (value == current_value) 6637 return 0; 6638 6639 cmos_cmd = (value > current_value) ? 6640 TP_CMOS_BRIGHTNESS_UP : 6641 TP_CMOS_BRIGHTNESS_DOWN; 6642 inc = (value > current_value) ? 1 : -1; 6643 6644 for (i = current_value; i != value; i += inc) 6645 if (issue_thinkpad_cmos_command(cmos_cmd)) 6646 return -EIO; 6647 6648 return 0; 6649 } 6650 6651 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6652 static int brightness_set(unsigned int value) 6653 { 6654 int res; 6655 6656 if (value > bright_maxlvl) 6657 return -EINVAL; 6658 6659 vdbg_printk(TPACPI_DBG_BRGHT, 6660 "set backlight level to %d\n", value); 6661 6662 res = mutex_lock_killable(&brightness_mutex); 6663 if (res < 0) 6664 return res; 6665 6666 switch (brightness_mode) { 6667 case TPACPI_BRGHT_MODE_EC: 6668 case TPACPI_BRGHT_MODE_ECNVRAM: 6669 res = tpacpi_brightness_set_ec(value); 6670 break; 6671 case TPACPI_BRGHT_MODE_UCMS_STEP: 6672 res = tpacpi_brightness_set_ucmsstep(value); 6673 break; 6674 default: 6675 res = -ENXIO; 6676 } 6677 6678 mutex_unlock(&brightness_mutex); 6679 return res; 6680 } 6681 6682 /* sysfs backlight class ----------------------------------------------- */ 6683 6684 static int brightness_update_status(struct backlight_device *bd) 6685 { 6686 int level = backlight_get_brightness(bd); 6687 6688 dbg_printk(TPACPI_DBG_BRGHT, 6689 "backlight: attempt to set level to %d\n", 6690 level); 6691 6692 /* it is the backlight class's job (caller) to handle 6693 * EINTR and other errors properly */ 6694 return brightness_set(level); 6695 } 6696 6697 static int brightness_get(struct backlight_device *bd) 6698 { 6699 int status, res; 6700 6701 res = mutex_lock_killable(&brightness_mutex); 6702 if (res < 0) 6703 return 0; 6704 6705 res = tpacpi_brightness_get_raw(&status); 6706 6707 mutex_unlock(&brightness_mutex); 6708 6709 if (res < 0) 6710 return 0; 6711 6712 return status & TP_EC_BACKLIGHT_LVLMSK; 6713 } 6714 6715 static void tpacpi_brightness_notify_change(void) 6716 { 6717 backlight_force_update(ibm_backlight_device, 6718 BACKLIGHT_UPDATE_HOTKEY); 6719 } 6720 6721 static const struct backlight_ops ibm_backlight_data = { 6722 .get_brightness = brightness_get, 6723 .update_status = brightness_update_status, 6724 }; 6725 6726 /* --------------------------------------------------------------------- */ 6727 6728 static int __init tpacpi_evaluate_bcl(struct acpi_device *adev, void *not_used) 6729 { 6730 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6731 union acpi_object *obj; 6732 acpi_status status; 6733 int rc; 6734 6735 status = acpi_evaluate_object(adev->handle, "_BCL", NULL, &buffer); 6736 if (ACPI_FAILURE(status)) 6737 return 0; 6738 6739 obj = buffer.pointer; 6740 if (!obj || obj->type != ACPI_TYPE_PACKAGE) { 6741 acpi_handle_info(adev->handle, 6742 "Unknown _BCL data, please report this to %s\n", 6743 TPACPI_MAIL); 6744 rc = 0; 6745 } else { 6746 rc = obj->package.count; 6747 } 6748 kfree(obj); 6749 6750 return rc; 6751 } 6752 6753 /* 6754 * Call _BCL method of video device. On some ThinkPads this will 6755 * switch the firmware to the ACPI brightness control mode. 6756 */ 6757 6758 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6759 { 6760 struct acpi_device *device; 6761 6762 device = acpi_fetch_acpi_dev(handle); 6763 if (!device) 6764 return 0; 6765 6766 return acpi_dev_for_each_child(device, tpacpi_evaluate_bcl, NULL); 6767 } 6768 6769 6770 /* 6771 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6772 */ 6773 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6774 { 6775 acpi_handle video_device; 6776 int bcl_levels = 0; 6777 6778 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6779 if (video_device) 6780 bcl_levels = tpacpi_query_bcl_levels(video_device); 6781 6782 tp_features.bright_acpimode = (bcl_levels > 0); 6783 6784 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6785 } 6786 6787 /* 6788 * These are only useful for models that have only one possibility 6789 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6790 * these quirks. 6791 */ 6792 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6793 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6794 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6795 6796 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6797 /* Models with ATI GPUs known to require ECNVRAM mode */ 6798 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6799 6800 /* Models with ATI GPUs that can use ECNVRAM */ 6801 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6802 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6803 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6804 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6805 6806 /* Models with Intel Extreme Graphics 2 */ 6807 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6808 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6809 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6810 6811 /* Models with Intel GMA900 */ 6812 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6813 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6814 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6815 }; 6816 6817 /* 6818 * Returns < 0 for error, otherwise sets tp_features.bright_* 6819 * and bright_maxlvl. 6820 */ 6821 static void __init tpacpi_detect_brightness_capabilities(void) 6822 { 6823 unsigned int b; 6824 6825 vdbg_printk(TPACPI_DBG_INIT, 6826 "detecting firmware brightness interface capabilities\n"); 6827 6828 /* we could run a quirks check here (same table used by 6829 * brightness_init) if needed */ 6830 6831 /* 6832 * We always attempt to detect acpi support, so as to switch 6833 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6834 * going to publish a backlight interface 6835 */ 6836 b = tpacpi_check_std_acpi_brightness_support(); 6837 switch (b) { 6838 case 16: 6839 bright_maxlvl = 15; 6840 break; 6841 case 8: 6842 case 0: 6843 bright_maxlvl = 7; 6844 break; 6845 default: 6846 tp_features.bright_unkfw = 1; 6847 bright_maxlvl = b - 1; 6848 } 6849 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6850 } 6851 6852 static int __init brightness_init(struct ibm_init_struct *iibm) 6853 { 6854 struct backlight_properties props; 6855 int b; 6856 unsigned long quirks; 6857 6858 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6859 6860 mutex_init(&brightness_mutex); 6861 6862 quirks = tpacpi_check_quirks(brightness_quirk_table, 6863 ARRAY_SIZE(brightness_quirk_table)); 6864 6865 /* tpacpi_detect_brightness_capabilities() must have run already */ 6866 6867 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6868 if (tp_features.bright_unkfw) 6869 return -ENODEV; 6870 6871 if (!brightness_enable) { 6872 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6873 "brightness support disabled by module parameter\n"); 6874 return -ENODEV; 6875 } 6876 6877 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6878 if (brightness_enable > 1) { 6879 pr_info("Standard ACPI backlight interface available, not loading native one\n"); 6880 return -ENODEV; 6881 } else if (brightness_enable == 1) { 6882 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n"); 6883 return -ENODEV; 6884 } 6885 } else if (!tp_features.bright_acpimode) { 6886 pr_notice("ACPI backlight interface not available\n"); 6887 return -ENODEV; 6888 } 6889 6890 pr_notice("ACPI native brightness control enabled\n"); 6891 6892 /* 6893 * Check for module parameter bogosity, note that we 6894 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6895 * able to detect "unspecified" 6896 */ 6897 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6898 return -EINVAL; 6899 6900 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6901 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6902 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6903 if (quirks & TPACPI_BRGHT_Q_EC) 6904 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6905 else 6906 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6907 6908 dbg_printk(TPACPI_DBG_BRGHT, 6909 "driver auto-selected brightness_mode=%d\n", 6910 brightness_mode); 6911 } 6912 6913 /* Safety */ 6914 if (!tpacpi_is_ibm() && 6915 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6916 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6917 return -EINVAL; 6918 6919 if (tpacpi_brightness_get_raw(&b) < 0) 6920 return -ENODEV; 6921 6922 memset(&props, 0, sizeof(struct backlight_properties)); 6923 props.type = BACKLIGHT_PLATFORM; 6924 props.max_brightness = bright_maxlvl; 6925 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6926 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6927 NULL, NULL, 6928 &ibm_backlight_data, 6929 &props); 6930 if (IS_ERR(ibm_backlight_device)) { 6931 int rc = PTR_ERR(ibm_backlight_device); 6932 ibm_backlight_device = NULL; 6933 pr_err("Could not register backlight device\n"); 6934 return rc; 6935 } 6936 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6937 "brightness is supported\n"); 6938 6939 if (quirks & TPACPI_BRGHT_Q_ASK) { 6940 pr_notice("brightness: will use unverified default: brightness_mode=%d\n", 6941 brightness_mode); 6942 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n", 6943 TPACPI_MAIL); 6944 } 6945 6946 /* Added by mistake in early 2007. Probably useless, but it could 6947 * be working around some unknown firmware problem where the value 6948 * read at startup doesn't match the real hardware state... so leave 6949 * it in place just in case */ 6950 backlight_update_status(ibm_backlight_device); 6951 6952 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6953 "brightness: registering brightness hotkeys as change notification\n"); 6954 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6955 | TP_ACPI_HKEY_BRGHTUP_MASK 6956 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6957 return 0; 6958 } 6959 6960 static void brightness_suspend(void) 6961 { 6962 tpacpi_brightness_checkpoint_nvram(); 6963 } 6964 6965 static void brightness_shutdown(void) 6966 { 6967 tpacpi_brightness_checkpoint_nvram(); 6968 } 6969 6970 static void brightness_exit(void) 6971 { 6972 if (ibm_backlight_device) { 6973 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6974 "calling backlight_device_unregister()\n"); 6975 backlight_device_unregister(ibm_backlight_device); 6976 } 6977 6978 tpacpi_brightness_checkpoint_nvram(); 6979 } 6980 6981 static int brightness_read(struct seq_file *m) 6982 { 6983 int level; 6984 6985 level = brightness_get(NULL); 6986 if (level < 0) { 6987 seq_printf(m, "level:\t\tunreadable\n"); 6988 } else { 6989 seq_printf(m, "level:\t\t%d\n", level); 6990 seq_printf(m, "commands:\tup, down\n"); 6991 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6992 bright_maxlvl); 6993 } 6994 6995 return 0; 6996 } 6997 6998 static int brightness_write(char *buf) 6999 { 7000 int level; 7001 int rc; 7002 char *cmd; 7003 7004 level = brightness_get(NULL); 7005 if (level < 0) 7006 return level; 7007 7008 while ((cmd = strsep(&buf, ","))) { 7009 if (strstarts(cmd, "up")) { 7010 if (level < bright_maxlvl) 7011 level++; 7012 } else if (strstarts(cmd, "down")) { 7013 if (level > 0) 7014 level--; 7015 } else if (sscanf(cmd, "level %d", &level) == 1 && 7016 level >= 0 && level <= bright_maxlvl) { 7017 /* new level set */ 7018 } else 7019 return -EINVAL; 7020 } 7021 7022 tpacpi_disclose_usertask("procfs brightness", 7023 "set level to %d\n", level); 7024 7025 /* 7026 * Now we know what the final level should be, so we try to set it. 7027 * Doing it this way makes the syscall restartable in case of EINTR 7028 */ 7029 rc = brightness_set(level); 7030 if (!rc && ibm_backlight_device) 7031 backlight_force_update(ibm_backlight_device, 7032 BACKLIGHT_UPDATE_SYSFS); 7033 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7034 } 7035 7036 static struct ibm_struct brightness_driver_data = { 7037 .name = "brightness", 7038 .read = brightness_read, 7039 .write = brightness_write, 7040 .exit = brightness_exit, 7041 .suspend = brightness_suspend, 7042 .shutdown = brightness_shutdown, 7043 }; 7044 7045 /************************************************************************* 7046 * Volume subdriver 7047 */ 7048 7049 /* 7050 * IBM ThinkPads have a simple volume controller with MUTE gating. 7051 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 7052 * 7053 * Since the *61 series (and probably also the later *60 series), Lenovo 7054 * ThinkPads only implement the MUTE gate. 7055 * 7056 * EC register 0x30 7057 * Bit 6: MUTE (1 mutes sound) 7058 * Bit 3-0: Volume 7059 * Other bits should be zero as far as we know. 7060 * 7061 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 7062 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 7063 * such as bit 7 which is used to detect repeated presses of MUTE, 7064 * and we leave them unchanged. 7065 * 7066 * On newer Lenovo ThinkPads, the EC can automatically change the volume 7067 * in response to user input. Unfortunately, this rarely works well. 7068 * The laptop changes the state of its internal MUTE gate and, on some 7069 * models, sends KEY_MUTE, causing any user code that responds to the 7070 * mute button to get confused. The hardware MUTE gate is also 7071 * unnecessary, since user code can handle the mute button without 7072 * kernel or EC help. 7073 * 7074 * To avoid confusing userspace, we simply disable all EC-based mute 7075 * and volume controls when possible. 7076 */ 7077 7078 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 7079 7080 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 7081 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 7082 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7083 7084 #if SNDRV_CARDS <= 32 7085 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7086 #else 7087 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7088 #endif 7089 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7090 static char *alsa_id = "ThinkPadEC"; 7091 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7092 7093 struct tpacpi_alsa_data { 7094 struct snd_card *card; 7095 struct snd_ctl_elem_id *ctl_mute_id; 7096 struct snd_ctl_elem_id *ctl_vol_id; 7097 }; 7098 7099 static struct snd_card *alsa_card; 7100 7101 enum { 7102 TP_EC_AUDIO = 0x30, 7103 7104 /* TP_EC_AUDIO bits */ 7105 TP_EC_AUDIO_MUTESW = 6, 7106 7107 /* TP_EC_AUDIO bitmasks */ 7108 TP_EC_AUDIO_LVL_MSK = 0x0F, 7109 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7110 7111 /* Maximum volume */ 7112 TP_EC_VOLUME_MAX = 14, 7113 }; 7114 7115 enum tpacpi_volume_access_mode { 7116 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7117 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7118 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7119 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7120 TPACPI_VOL_MODE_MAX 7121 }; 7122 7123 enum tpacpi_volume_capabilities { 7124 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7125 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7126 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7127 TPACPI_VOL_CAP_MAX 7128 }; 7129 7130 enum tpacpi_mute_btn_mode { 7131 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7132 /* We don't know what mode 1 is. */ 7133 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7134 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7135 }; 7136 7137 static enum tpacpi_volume_access_mode volume_mode = 7138 TPACPI_VOL_MODE_MAX; 7139 7140 static enum tpacpi_volume_capabilities volume_capabilities; 7141 static bool volume_control_allowed; 7142 static bool software_mute_requested = true; 7143 static bool software_mute_active; 7144 static int software_mute_orig_mode; 7145 7146 /* 7147 * Used to syncronize writers to TP_EC_AUDIO and 7148 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7149 */ 7150 static struct mutex volume_mutex; 7151 7152 static void tpacpi_volume_checkpoint_nvram(void) 7153 { 7154 u8 lec = 0; 7155 u8 b_nvram; 7156 u8 ec_mask; 7157 7158 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7159 return; 7160 if (!volume_control_allowed) 7161 return; 7162 if (software_mute_active) 7163 return; 7164 7165 vdbg_printk(TPACPI_DBG_MIXER, 7166 "trying to checkpoint mixer state to NVRAM...\n"); 7167 7168 if (tp_features.mixer_no_level_control) 7169 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7170 else 7171 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7172 7173 if (mutex_lock_killable(&volume_mutex) < 0) 7174 return; 7175 7176 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7177 goto unlock; 7178 lec &= ec_mask; 7179 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7180 7181 if (lec != (b_nvram & ec_mask)) { 7182 /* NVRAM needs update */ 7183 b_nvram &= ~ec_mask; 7184 b_nvram |= lec; 7185 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7186 dbg_printk(TPACPI_DBG_MIXER, 7187 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7188 (unsigned int) lec, (unsigned int) b_nvram); 7189 } else { 7190 vdbg_printk(TPACPI_DBG_MIXER, 7191 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7192 (unsigned int) lec, (unsigned int) b_nvram); 7193 } 7194 7195 unlock: 7196 mutex_unlock(&volume_mutex); 7197 } 7198 7199 static int volume_get_status_ec(u8 *status) 7200 { 7201 u8 s; 7202 7203 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7204 return -EIO; 7205 7206 *status = s; 7207 7208 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7209 7210 return 0; 7211 } 7212 7213 static int volume_get_status(u8 *status) 7214 { 7215 return volume_get_status_ec(status); 7216 } 7217 7218 static int volume_set_status_ec(const u8 status) 7219 { 7220 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7221 return -EIO; 7222 7223 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7224 7225 /* 7226 * On X200s, and possibly on others, it can take a while for 7227 * reads to become correct. 7228 */ 7229 msleep(1); 7230 7231 return 0; 7232 } 7233 7234 static int volume_set_status(const u8 status) 7235 { 7236 return volume_set_status_ec(status); 7237 } 7238 7239 /* returns < 0 on error, 0 on no change, 1 on change */ 7240 static int __volume_set_mute_ec(const bool mute) 7241 { 7242 int rc; 7243 u8 s, n; 7244 7245 if (mutex_lock_killable(&volume_mutex) < 0) 7246 return -EINTR; 7247 7248 rc = volume_get_status_ec(&s); 7249 if (rc) 7250 goto unlock; 7251 7252 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7253 s & ~TP_EC_AUDIO_MUTESW_MSK; 7254 7255 if (n != s) { 7256 rc = volume_set_status_ec(n); 7257 if (!rc) 7258 rc = 1; 7259 } 7260 7261 unlock: 7262 mutex_unlock(&volume_mutex); 7263 return rc; 7264 } 7265 7266 static int volume_alsa_set_mute(const bool mute) 7267 { 7268 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7269 (mute) ? "" : "un"); 7270 return __volume_set_mute_ec(mute); 7271 } 7272 7273 static int volume_set_mute(const bool mute) 7274 { 7275 int rc; 7276 7277 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7278 (mute) ? "" : "un"); 7279 7280 rc = __volume_set_mute_ec(mute); 7281 return (rc < 0) ? rc : 0; 7282 } 7283 7284 /* returns < 0 on error, 0 on no change, 1 on change */ 7285 static int __volume_set_volume_ec(const u8 vol) 7286 { 7287 int rc; 7288 u8 s, n; 7289 7290 if (vol > TP_EC_VOLUME_MAX) 7291 return -EINVAL; 7292 7293 if (mutex_lock_killable(&volume_mutex) < 0) 7294 return -EINTR; 7295 7296 rc = volume_get_status_ec(&s); 7297 if (rc) 7298 goto unlock; 7299 7300 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7301 7302 if (n != s) { 7303 rc = volume_set_status_ec(n); 7304 if (!rc) 7305 rc = 1; 7306 } 7307 7308 unlock: 7309 mutex_unlock(&volume_mutex); 7310 return rc; 7311 } 7312 7313 static int volume_set_software_mute(bool startup) 7314 { 7315 int result; 7316 7317 if (!tpacpi_is_lenovo()) 7318 return -ENODEV; 7319 7320 if (startup) { 7321 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7322 "HAUM", "qd")) 7323 return -EIO; 7324 7325 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7326 "Initial HAUM setting was %d\n", 7327 software_mute_orig_mode); 7328 } 7329 7330 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7331 (int)TP_EC_MUTE_BTN_NONE)) 7332 return -EIO; 7333 7334 if (result != TP_EC_MUTE_BTN_NONE) 7335 pr_warn("Unexpected SAUM result %d\n", 7336 result); 7337 7338 /* 7339 * In software mute mode, the standard codec controls take 7340 * precendence, so we unmute the ThinkPad HW switch at 7341 * startup. Just on case there are SAUM-capable ThinkPads 7342 * with level controls, set max HW volume as well. 7343 */ 7344 if (tp_features.mixer_no_level_control) 7345 result = volume_set_mute(false); 7346 else 7347 result = volume_set_status(TP_EC_VOLUME_MAX); 7348 7349 if (result != 0) 7350 pr_warn("Failed to unmute the HW mute switch\n"); 7351 7352 return 0; 7353 } 7354 7355 static void volume_exit_software_mute(void) 7356 { 7357 int r; 7358 7359 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7360 || r != software_mute_orig_mode) 7361 pr_warn("Failed to restore mute mode\n"); 7362 } 7363 7364 static int volume_alsa_set_volume(const u8 vol) 7365 { 7366 dbg_printk(TPACPI_DBG_MIXER, 7367 "ALSA: trying to set volume level to %hu\n", vol); 7368 return __volume_set_volume_ec(vol); 7369 } 7370 7371 static void volume_alsa_notify_change(void) 7372 { 7373 struct tpacpi_alsa_data *d; 7374 7375 if (alsa_card && alsa_card->private_data) { 7376 d = alsa_card->private_data; 7377 if (d->ctl_mute_id) 7378 snd_ctl_notify(alsa_card, 7379 SNDRV_CTL_EVENT_MASK_VALUE, 7380 d->ctl_mute_id); 7381 if (d->ctl_vol_id) 7382 snd_ctl_notify(alsa_card, 7383 SNDRV_CTL_EVENT_MASK_VALUE, 7384 d->ctl_vol_id); 7385 } 7386 } 7387 7388 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7389 struct snd_ctl_elem_info *uinfo) 7390 { 7391 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7392 uinfo->count = 1; 7393 uinfo->value.integer.min = 0; 7394 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7395 return 0; 7396 } 7397 7398 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7399 struct snd_ctl_elem_value *ucontrol) 7400 { 7401 u8 s; 7402 int rc; 7403 7404 rc = volume_get_status(&s); 7405 if (rc < 0) 7406 return rc; 7407 7408 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7409 return 0; 7410 } 7411 7412 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7413 struct snd_ctl_elem_value *ucontrol) 7414 { 7415 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7416 ucontrol->value.integer.value[0]); 7417 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7418 } 7419 7420 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7421 7422 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7423 struct snd_ctl_elem_value *ucontrol) 7424 { 7425 u8 s; 7426 int rc; 7427 7428 rc = volume_get_status(&s); 7429 if (rc < 0) 7430 return rc; 7431 7432 ucontrol->value.integer.value[0] = 7433 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7434 return 0; 7435 } 7436 7437 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7438 struct snd_ctl_elem_value *ucontrol) 7439 { 7440 tpacpi_disclose_usertask("ALSA", "%smute\n", 7441 ucontrol->value.integer.value[0] ? 7442 "un" : ""); 7443 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7444 } 7445 7446 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7447 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7448 .name = "Console Playback Volume", 7449 .index = 0, 7450 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7451 .info = volume_alsa_vol_info, 7452 .get = volume_alsa_vol_get, 7453 }; 7454 7455 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7456 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7457 .name = "Console Playback Switch", 7458 .index = 0, 7459 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7460 .info = volume_alsa_mute_info, 7461 .get = volume_alsa_mute_get, 7462 }; 7463 7464 static void volume_suspend(void) 7465 { 7466 tpacpi_volume_checkpoint_nvram(); 7467 } 7468 7469 static void volume_resume(void) 7470 { 7471 if (software_mute_active) { 7472 if (volume_set_software_mute(false) < 0) 7473 pr_warn("Failed to restore software mute\n"); 7474 } else { 7475 volume_alsa_notify_change(); 7476 } 7477 } 7478 7479 static void volume_shutdown(void) 7480 { 7481 tpacpi_volume_checkpoint_nvram(); 7482 } 7483 7484 static void volume_exit(void) 7485 { 7486 if (alsa_card) { 7487 snd_card_free(alsa_card); 7488 alsa_card = NULL; 7489 } 7490 7491 tpacpi_volume_checkpoint_nvram(); 7492 7493 if (software_mute_active) 7494 volume_exit_software_mute(); 7495 } 7496 7497 static int __init volume_create_alsa_mixer(void) 7498 { 7499 struct snd_card *card; 7500 struct tpacpi_alsa_data *data; 7501 struct snd_kcontrol *ctl_vol; 7502 struct snd_kcontrol *ctl_mute; 7503 int rc; 7504 7505 rc = snd_card_new(&tpacpi_pdev->dev, 7506 alsa_index, alsa_id, THIS_MODULE, 7507 sizeof(struct tpacpi_alsa_data), &card); 7508 if (rc < 0 || !card) { 7509 pr_err("Failed to create ALSA card structures: %d\n", rc); 7510 return -ENODEV; 7511 } 7512 7513 BUG_ON(!card->private_data); 7514 data = card->private_data; 7515 data->card = card; 7516 7517 strscpy(card->driver, TPACPI_ALSA_DRVNAME, 7518 sizeof(card->driver)); 7519 strscpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7520 sizeof(card->shortname)); 7521 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7522 (thinkpad_id.ec_version_str) ? 7523 thinkpad_id.ec_version_str : "(unknown)"); 7524 snprintf(card->longname, sizeof(card->longname), 7525 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7526 (thinkpad_id.ec_version_str) ? 7527 thinkpad_id.ec_version_str : "unknown"); 7528 7529 if (volume_control_allowed) { 7530 volume_alsa_control_vol.put = volume_alsa_vol_put; 7531 volume_alsa_control_vol.access = 7532 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7533 7534 volume_alsa_control_mute.put = volume_alsa_mute_put; 7535 volume_alsa_control_mute.access = 7536 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7537 } 7538 7539 if (!tp_features.mixer_no_level_control) { 7540 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7541 rc = snd_ctl_add(card, ctl_vol); 7542 if (rc < 0) { 7543 pr_err("Failed to create ALSA volume control: %d\n", 7544 rc); 7545 goto err_exit; 7546 } 7547 data->ctl_vol_id = &ctl_vol->id; 7548 } 7549 7550 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7551 rc = snd_ctl_add(card, ctl_mute); 7552 if (rc < 0) { 7553 pr_err("Failed to create ALSA mute control: %d\n", rc); 7554 goto err_exit; 7555 } 7556 data->ctl_mute_id = &ctl_mute->id; 7557 7558 rc = snd_card_register(card); 7559 if (rc < 0) { 7560 pr_err("Failed to register ALSA card: %d\n", rc); 7561 goto err_exit; 7562 } 7563 7564 alsa_card = card; 7565 return 0; 7566 7567 err_exit: 7568 snd_card_free(card); 7569 return -ENODEV; 7570 } 7571 7572 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7573 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7574 7575 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7576 /* Whitelist volume level on all IBM by default */ 7577 { .vendor = PCI_VENDOR_ID_IBM, 7578 .bios = TPACPI_MATCH_ANY, 7579 .ec = TPACPI_MATCH_ANY, 7580 .quirks = TPACPI_VOL_Q_LEVEL }, 7581 7582 /* Lenovo models with volume control (needs confirmation) */ 7583 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7584 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7585 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7586 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7587 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7588 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7589 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7590 7591 /* Whitelist mute-only on all Lenovo by default */ 7592 { .vendor = PCI_VENDOR_ID_LENOVO, 7593 .bios = TPACPI_MATCH_ANY, 7594 .ec = TPACPI_MATCH_ANY, 7595 .quirks = TPACPI_VOL_Q_MUTEONLY } 7596 }; 7597 7598 static int __init volume_init(struct ibm_init_struct *iibm) 7599 { 7600 unsigned long quirks; 7601 int rc; 7602 7603 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7604 7605 mutex_init(&volume_mutex); 7606 7607 /* 7608 * Check for module parameter bogosity, note that we 7609 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7610 * able to detect "unspecified" 7611 */ 7612 if (volume_mode > TPACPI_VOL_MODE_MAX) 7613 return -EINVAL; 7614 7615 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7616 pr_err("UCMS step volume mode not implemented, please contact %s\n", 7617 TPACPI_MAIL); 7618 return -ENODEV; 7619 } 7620 7621 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7622 return -EINVAL; 7623 7624 /* 7625 * The ALSA mixer is our primary interface. 7626 * When disabled, don't install the subdriver at all 7627 */ 7628 if (!alsa_enable) { 7629 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7630 "ALSA mixer disabled by parameter, not loading volume subdriver...\n"); 7631 return -ENODEV; 7632 } 7633 7634 quirks = tpacpi_check_quirks(volume_quirk_table, 7635 ARRAY_SIZE(volume_quirk_table)); 7636 7637 switch (volume_capabilities) { 7638 case TPACPI_VOL_CAP_AUTO: 7639 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7640 tp_features.mixer_no_level_control = 1; 7641 else if (quirks & TPACPI_VOL_Q_LEVEL) 7642 tp_features.mixer_no_level_control = 0; 7643 else 7644 return -ENODEV; /* no mixer */ 7645 break; 7646 case TPACPI_VOL_CAP_VOLMUTE: 7647 tp_features.mixer_no_level_control = 0; 7648 break; 7649 case TPACPI_VOL_CAP_MUTEONLY: 7650 tp_features.mixer_no_level_control = 1; 7651 break; 7652 default: 7653 return -ENODEV; 7654 } 7655 7656 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7657 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7658 "using user-supplied volume_capabilities=%d\n", 7659 volume_capabilities); 7660 7661 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7662 volume_mode == TPACPI_VOL_MODE_MAX) { 7663 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7664 7665 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7666 "driver auto-selected volume_mode=%d\n", 7667 volume_mode); 7668 } else { 7669 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7670 "using user-supplied volume_mode=%d\n", 7671 volume_mode); 7672 } 7673 7674 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7675 "mute is supported, volume control is %s\n", 7676 str_supported(!tp_features.mixer_no_level_control)); 7677 7678 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7679 software_mute_active = true; 7680 } else { 7681 rc = volume_create_alsa_mixer(); 7682 if (rc) { 7683 pr_err("Could not create the ALSA mixer interface\n"); 7684 return rc; 7685 } 7686 7687 pr_info("Console audio control enabled, mode: %s\n", 7688 (volume_control_allowed) ? 7689 "override (read/write)" : 7690 "monitor (read only)"); 7691 } 7692 7693 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7694 "registering volume hotkeys as change notification\n"); 7695 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7696 | TP_ACPI_HKEY_VOLUP_MASK 7697 | TP_ACPI_HKEY_VOLDWN_MASK 7698 | TP_ACPI_HKEY_MUTE_MASK); 7699 7700 return 0; 7701 } 7702 7703 static int volume_read(struct seq_file *m) 7704 { 7705 u8 status; 7706 7707 if (volume_get_status(&status) < 0) { 7708 seq_printf(m, "level:\t\tunreadable\n"); 7709 } else { 7710 if (tp_features.mixer_no_level_control) 7711 seq_printf(m, "level:\t\tunsupported\n"); 7712 else 7713 seq_printf(m, "level:\t\t%d\n", 7714 status & TP_EC_AUDIO_LVL_MSK); 7715 7716 seq_printf(m, "mute:\t\t%s\n", str_on_off(status & BIT(TP_EC_AUDIO_MUTESW))); 7717 7718 if (volume_control_allowed) { 7719 seq_printf(m, "commands:\tunmute, mute\n"); 7720 if (!tp_features.mixer_no_level_control) { 7721 seq_printf(m, "commands:\tup, down\n"); 7722 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7723 TP_EC_VOLUME_MAX); 7724 } 7725 } 7726 } 7727 7728 return 0; 7729 } 7730 7731 static int volume_write(char *buf) 7732 { 7733 u8 s; 7734 u8 new_level, new_mute; 7735 int l; 7736 char *cmd; 7737 int rc; 7738 7739 /* 7740 * We do allow volume control at driver startup, so that the 7741 * user can set initial state through the volume=... parameter hack. 7742 */ 7743 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7744 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7745 tp_warned.volume_ctrl_forbidden = 1; 7746 pr_notice("Console audio control in monitor mode, changes are not allowed\n"); 7747 pr_notice("Use the volume_control=1 module parameter to enable volume control\n"); 7748 } 7749 return -EPERM; 7750 } 7751 7752 rc = volume_get_status(&s); 7753 if (rc < 0) 7754 return rc; 7755 7756 new_level = s & TP_EC_AUDIO_LVL_MSK; 7757 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7758 7759 while ((cmd = strsep(&buf, ","))) { 7760 if (!tp_features.mixer_no_level_control) { 7761 if (strstarts(cmd, "up")) { 7762 if (new_mute) 7763 new_mute = 0; 7764 else if (new_level < TP_EC_VOLUME_MAX) 7765 new_level++; 7766 continue; 7767 } else if (strstarts(cmd, "down")) { 7768 if (new_mute) 7769 new_mute = 0; 7770 else if (new_level > 0) 7771 new_level--; 7772 continue; 7773 } else if (sscanf(cmd, "level %u", &l) == 1 && 7774 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7775 new_level = l; 7776 continue; 7777 } 7778 } 7779 if (strstarts(cmd, "mute")) 7780 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7781 else if (strstarts(cmd, "unmute")) 7782 new_mute = 0; 7783 else 7784 return -EINVAL; 7785 } 7786 7787 if (tp_features.mixer_no_level_control) { 7788 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7789 new_mute ? "" : "un"); 7790 rc = volume_set_mute(!!new_mute); 7791 } else { 7792 tpacpi_disclose_usertask("procfs volume", 7793 "%smute and set level to %d\n", 7794 new_mute ? "" : "un", new_level); 7795 rc = volume_set_status(new_mute | new_level); 7796 } 7797 volume_alsa_notify_change(); 7798 7799 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7800 } 7801 7802 static struct ibm_struct volume_driver_data = { 7803 .name = "volume", 7804 .read = volume_read, 7805 .write = volume_write, 7806 .exit = volume_exit, 7807 .suspend = volume_suspend, 7808 .resume = volume_resume, 7809 .shutdown = volume_shutdown, 7810 }; 7811 7812 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7813 7814 #define alsa_card NULL 7815 7816 static inline void volume_alsa_notify_change(void) 7817 { 7818 } 7819 7820 static int __init volume_init(struct ibm_init_struct *iibm) 7821 { 7822 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7823 7824 return -ENODEV; 7825 } 7826 7827 static struct ibm_struct volume_driver_data = { 7828 .name = "volume", 7829 }; 7830 7831 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7832 7833 /************************************************************************* 7834 * Fan subdriver 7835 */ 7836 7837 /* 7838 * FAN ACCESS MODES 7839 * 7840 * TPACPI_FAN_RD_ACPI_GFAN: 7841 * ACPI GFAN method: returns fan level 7842 * 7843 * see TPACPI_FAN_WR_ACPI_SFAN 7844 * EC 0x2f (HFSP) not available if GFAN exists 7845 * 7846 * TPACPI_FAN_WR_ACPI_SFAN: 7847 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7848 * 7849 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7850 * it for writing. 7851 * 7852 * TPACPI_FAN_WR_TPEC: 7853 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7854 * Supported on almost all ThinkPads 7855 * 7856 * Fan speed changes of any sort (including those caused by the 7857 * disengaged mode) are usually done slowly by the firmware as the 7858 * maximum amount of fan duty cycle change per second seems to be 7859 * limited. 7860 * 7861 * Reading is not available if GFAN exists. 7862 * Writing is not available if SFAN exists. 7863 * 7864 * Bits 7865 * 7 automatic mode engaged; 7866 * (default operation mode of the ThinkPad) 7867 * fan level is ignored in this mode. 7868 * 6 full speed mode (takes precedence over bit 7); 7869 * not available on all thinkpads. May disable 7870 * the tachometer while the fan controller ramps up 7871 * the speed (which can take up to a few *minutes*). 7872 * Speeds up fan to 100% duty-cycle, which is far above 7873 * the standard RPM levels. It is not impossible that 7874 * it could cause hardware damage. 7875 * 5-3 unused in some models. Extra bits for fan level 7876 * in others, but still useless as all values above 7877 * 7 map to the same speed as level 7 in these models. 7878 * 2-0 fan level (0..7 usually) 7879 * 0x00 = stop 7880 * 0x07 = max (set when temperatures critical) 7881 * Some ThinkPads may have other levels, see 7882 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7883 * 7884 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7885 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7886 * does so, its initial value is meaningless (0x07). 7887 * 7888 * For firmware bugs, refer to: 7889 * https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7890 * 7891 * ---- 7892 * 7893 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7894 * Main fan tachometer reading (in RPM) 7895 * 7896 * This register is present on all ThinkPads with a new-style EC, and 7897 * it is known not to be present on the A21m/e, and T22, as there is 7898 * something else in offset 0x84 according to the ACPI DSDT. Other 7899 * ThinkPads from this same time period (and earlier) probably lack the 7900 * tachometer as well. 7901 * 7902 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7903 * was never fixed by IBM to report the EC firmware version string 7904 * probably support the tachometer (like the early X models), so 7905 * detecting it is quite hard. We need more data to know for sure. 7906 * 7907 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7908 * might result. 7909 * 7910 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7911 * mode. 7912 * 7913 * For firmware bugs, refer to: 7914 * https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7915 * 7916 * ---- 7917 * 7918 * ThinkPad EC register 0x31 bit 0 (only on select models) 7919 * 7920 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7921 * show the speed of the main fan. When bit 0 of EC register 0x31 7922 * is one, the tachometer registers show the speed of the auxiliary 7923 * fan. 7924 * 7925 * Fan control seems to affect both fans, regardless of the state 7926 * of this bit. 7927 * 7928 * So far, only the firmware for the X60/X61 non-tablet versions 7929 * seem to support this (firmware TP-7M). 7930 * 7931 * TPACPI_FAN_WR_ACPI_FANS: 7932 * ThinkPad X31, X40, X41. Not available in the X60. 7933 * 7934 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7935 * high speed. ACPI DSDT seems to map these three speeds to levels 7936 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7937 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7938 * 7939 * The speeds are stored on handles 7940 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7941 * 7942 * There are three default speed sets, accessible as handles: 7943 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7944 * 7945 * ACPI DSDT switches which set is in use depending on various 7946 * factors. 7947 * 7948 * TPACPI_FAN_WR_TPEC is also available and should be used to 7949 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7950 * but the ACPI tables just mention level 7. 7951 */ 7952 7953 enum { /* Fan control constants */ 7954 fan_status_offset = 0x2f, /* EC register 0x2f */ 7955 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7956 * 0x84 must be read before 0x85 */ 7957 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7958 bit 0 selects which fan is active */ 7959 7960 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7961 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7962 7963 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7964 }; 7965 7966 enum fan_status_access_mode { 7967 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7968 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7969 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7970 }; 7971 7972 enum fan_control_access_mode { 7973 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7974 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7975 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7976 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7977 }; 7978 7979 enum fan_control_commands { 7980 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7981 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7982 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7983 * and also watchdog cmd */ 7984 }; 7985 7986 static bool fan_control_allowed; 7987 7988 static enum fan_status_access_mode fan_status_access_mode; 7989 static enum fan_control_access_mode fan_control_access_mode; 7990 static enum fan_control_commands fan_control_commands; 7991 7992 static u8 fan_control_initial_status; 7993 static u8 fan_control_desired_level; 7994 static u8 fan_control_resume_level; 7995 static int fan_watchdog_maxinterval; 7996 7997 static struct mutex fan_mutex; 7998 7999 static void fan_watchdog_fire(struct work_struct *ignored); 8000 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 8001 8002 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 8003 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 8004 "\\FSPD", /* 600e/x, 770e, 770x */ 8005 ); /* all others */ 8006 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 8007 "JFNS", /* 770x-JL */ 8008 ); /* all others */ 8009 8010 /* 8011 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 8012 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 8013 * be in auto mode (0x80). 8014 * 8015 * This is corrected by any write to HFSP either by the driver, or 8016 * by the firmware. 8017 * 8018 * We assume 0x07 really means auto mode while this quirk is active, 8019 * as this is far more likely than the ThinkPad being in level 7, 8020 * which is only used by the firmware during thermal emergencies. 8021 * 8022 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 8023 * TP-70 (T43, R52), which are known to be buggy. 8024 */ 8025 8026 static void fan_quirk1_setup(void) 8027 { 8028 if (fan_control_initial_status == 0x07) { 8029 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n"); 8030 tp_features.fan_ctrl_status_undef = 1; 8031 } 8032 } 8033 8034 static void fan_quirk1_handle(u8 *fan_status) 8035 { 8036 if (unlikely(tp_features.fan_ctrl_status_undef)) { 8037 if (*fan_status != fan_control_initial_status) { 8038 /* something changed the HFSP regisnter since 8039 * driver init time, so it is not undefined 8040 * anymore */ 8041 tp_features.fan_ctrl_status_undef = 0; 8042 } else { 8043 /* Return most likely status. In fact, it 8044 * might be the only possible status */ 8045 *fan_status = TP_EC_FAN_AUTO; 8046 } 8047 } 8048 } 8049 8050 /* Select main fan on X60/X61, NOOP on others */ 8051 static bool fan_select_fan1(void) 8052 { 8053 if (tp_features.second_fan) { 8054 u8 val; 8055 8056 if (ec_read(fan_select_offset, &val) < 0) 8057 return false; 8058 val &= 0xFEU; 8059 if (ec_write(fan_select_offset, val) < 0) 8060 return false; 8061 } 8062 return true; 8063 } 8064 8065 /* Select secondary fan on X60/X61 */ 8066 static bool fan_select_fan2(void) 8067 { 8068 u8 val; 8069 8070 if (!tp_features.second_fan) 8071 return false; 8072 8073 if (ec_read(fan_select_offset, &val) < 0) 8074 return false; 8075 val |= 0x01U; 8076 if (ec_write(fan_select_offset, val) < 0) 8077 return false; 8078 8079 return true; 8080 } 8081 8082 static void fan_update_desired_level(u8 status) 8083 { 8084 lockdep_assert_held(&fan_mutex); 8085 8086 if ((status & 8087 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8088 if (status > 7) 8089 fan_control_desired_level = 7; 8090 else 8091 fan_control_desired_level = status; 8092 } 8093 } 8094 8095 static int fan_get_status(u8 *status) 8096 { 8097 u8 s; 8098 8099 /* TODO: 8100 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8101 8102 switch (fan_status_access_mode) { 8103 case TPACPI_FAN_RD_ACPI_GFAN: { 8104 /* 570, 600e/x, 770e, 770x */ 8105 int res; 8106 8107 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8108 return -EIO; 8109 8110 if (likely(status)) 8111 *status = res & 0x07; 8112 8113 break; 8114 } 8115 case TPACPI_FAN_RD_TPEC: 8116 /* all except 570, 600e/x, 770e, 770x */ 8117 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8118 return -EIO; 8119 8120 if (likely(status)) { 8121 *status = s; 8122 fan_quirk1_handle(status); 8123 } 8124 8125 break; 8126 8127 default: 8128 return -ENXIO; 8129 } 8130 8131 return 0; 8132 } 8133 8134 static int fan_get_status_safe(u8 *status) 8135 { 8136 int rc; 8137 u8 s; 8138 8139 if (mutex_lock_killable(&fan_mutex)) 8140 return -ERESTARTSYS; 8141 rc = fan_get_status(&s); 8142 if (!rc) 8143 fan_update_desired_level(s); 8144 mutex_unlock(&fan_mutex); 8145 8146 if (rc) 8147 return rc; 8148 if (status) 8149 *status = s; 8150 8151 return 0; 8152 } 8153 8154 static int fan_get_speed(unsigned int *speed) 8155 { 8156 u8 hi, lo; 8157 8158 switch (fan_status_access_mode) { 8159 case TPACPI_FAN_RD_TPEC: 8160 /* all except 570, 600e/x, 770e, 770x */ 8161 if (unlikely(!fan_select_fan1())) 8162 return -EIO; 8163 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8164 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8165 return -EIO; 8166 8167 if (likely(speed)) 8168 *speed = (hi << 8) | lo; 8169 8170 break; 8171 8172 default: 8173 return -ENXIO; 8174 } 8175 8176 return 0; 8177 } 8178 8179 static int fan2_get_speed(unsigned int *speed) 8180 { 8181 u8 hi, lo; 8182 bool rc; 8183 8184 switch (fan_status_access_mode) { 8185 case TPACPI_FAN_RD_TPEC: 8186 /* all except 570, 600e/x, 770e, 770x */ 8187 if (unlikely(!fan_select_fan2())) 8188 return -EIO; 8189 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8190 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8191 fan_select_fan1(); /* play it safe */ 8192 if (rc) 8193 return -EIO; 8194 8195 if (likely(speed)) 8196 *speed = (hi << 8) | lo; 8197 8198 break; 8199 8200 default: 8201 return -ENXIO; 8202 } 8203 8204 return 0; 8205 } 8206 8207 static int fan_set_level(int level) 8208 { 8209 if (!fan_control_allowed) 8210 return -EPERM; 8211 8212 switch (fan_control_access_mode) { 8213 case TPACPI_FAN_WR_ACPI_SFAN: 8214 if ((level < 0) || (level > 7)) 8215 return -EINVAL; 8216 8217 if (tp_features.second_fan_ctl) { 8218 if (!fan_select_fan2() || 8219 !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) { 8220 pr_warn("Couldn't set 2nd fan level, disabling support\n"); 8221 tp_features.second_fan_ctl = 0; 8222 } 8223 fan_select_fan1(); 8224 } 8225 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8226 return -EIO; 8227 break; 8228 8229 case TPACPI_FAN_WR_ACPI_FANS: 8230 case TPACPI_FAN_WR_TPEC: 8231 if (!(level & TP_EC_FAN_AUTO) && 8232 !(level & TP_EC_FAN_FULLSPEED) && 8233 ((level < 0) || (level > 7))) 8234 return -EINVAL; 8235 8236 /* safety net should the EC not support AUTO 8237 * or FULLSPEED mode bits and just ignore them */ 8238 if (level & TP_EC_FAN_FULLSPEED) 8239 level |= 7; /* safety min speed 7 */ 8240 else if (level & TP_EC_FAN_AUTO) 8241 level |= 4; /* safety min speed 4 */ 8242 8243 if (tp_features.second_fan_ctl) { 8244 if (!fan_select_fan2() || 8245 !acpi_ec_write(fan_status_offset, level)) { 8246 pr_warn("Couldn't set 2nd fan level, disabling support\n"); 8247 tp_features.second_fan_ctl = 0; 8248 } 8249 fan_select_fan1(); 8250 8251 } 8252 if (!acpi_ec_write(fan_status_offset, level)) 8253 return -EIO; 8254 else 8255 tp_features.fan_ctrl_status_undef = 0; 8256 break; 8257 8258 default: 8259 return -ENXIO; 8260 } 8261 8262 vdbg_printk(TPACPI_DBG_FAN, 8263 "fan control: set fan control register to 0x%02x\n", level); 8264 return 0; 8265 } 8266 8267 static int fan_set_level_safe(int level) 8268 { 8269 int rc; 8270 8271 if (!fan_control_allowed) 8272 return -EPERM; 8273 8274 if (mutex_lock_killable(&fan_mutex)) 8275 return -ERESTARTSYS; 8276 8277 if (level == TPACPI_FAN_LAST_LEVEL) 8278 level = fan_control_desired_level; 8279 8280 rc = fan_set_level(level); 8281 if (!rc) 8282 fan_update_desired_level(level); 8283 8284 mutex_unlock(&fan_mutex); 8285 return rc; 8286 } 8287 8288 static int fan_set_enable(void) 8289 { 8290 u8 s; 8291 int rc; 8292 8293 if (!fan_control_allowed) 8294 return -EPERM; 8295 8296 if (mutex_lock_killable(&fan_mutex)) 8297 return -ERESTARTSYS; 8298 8299 switch (fan_control_access_mode) { 8300 case TPACPI_FAN_WR_ACPI_FANS: 8301 case TPACPI_FAN_WR_TPEC: 8302 rc = fan_get_status(&s); 8303 if (rc) 8304 break; 8305 8306 /* Don't go out of emergency fan mode */ 8307 if (s != 7) { 8308 s &= 0x07; 8309 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8310 } 8311 8312 if (!acpi_ec_write(fan_status_offset, s)) 8313 rc = -EIO; 8314 else { 8315 tp_features.fan_ctrl_status_undef = 0; 8316 rc = 0; 8317 } 8318 break; 8319 8320 case TPACPI_FAN_WR_ACPI_SFAN: 8321 rc = fan_get_status(&s); 8322 if (rc) 8323 break; 8324 8325 s &= 0x07; 8326 8327 /* Set fan to at least level 4 */ 8328 s |= 4; 8329 8330 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8331 rc = -EIO; 8332 else 8333 rc = 0; 8334 break; 8335 8336 default: 8337 rc = -ENXIO; 8338 } 8339 8340 mutex_unlock(&fan_mutex); 8341 8342 if (!rc) 8343 vdbg_printk(TPACPI_DBG_FAN, 8344 "fan control: set fan control register to 0x%02x\n", 8345 s); 8346 return rc; 8347 } 8348 8349 static int fan_set_disable(void) 8350 { 8351 int rc; 8352 8353 if (!fan_control_allowed) 8354 return -EPERM; 8355 8356 if (mutex_lock_killable(&fan_mutex)) 8357 return -ERESTARTSYS; 8358 8359 rc = 0; 8360 switch (fan_control_access_mode) { 8361 case TPACPI_FAN_WR_ACPI_FANS: 8362 case TPACPI_FAN_WR_TPEC: 8363 if (!acpi_ec_write(fan_status_offset, 0x00)) 8364 rc = -EIO; 8365 else { 8366 fan_control_desired_level = 0; 8367 tp_features.fan_ctrl_status_undef = 0; 8368 } 8369 break; 8370 8371 case TPACPI_FAN_WR_ACPI_SFAN: 8372 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8373 rc = -EIO; 8374 else 8375 fan_control_desired_level = 0; 8376 break; 8377 8378 default: 8379 rc = -ENXIO; 8380 } 8381 8382 if (!rc) 8383 vdbg_printk(TPACPI_DBG_FAN, 8384 "fan control: set fan control register to 0\n"); 8385 8386 mutex_unlock(&fan_mutex); 8387 return rc; 8388 } 8389 8390 static int fan_set_speed(int speed) 8391 { 8392 int rc; 8393 8394 if (!fan_control_allowed) 8395 return -EPERM; 8396 8397 if (mutex_lock_killable(&fan_mutex)) 8398 return -ERESTARTSYS; 8399 8400 rc = 0; 8401 switch (fan_control_access_mode) { 8402 case TPACPI_FAN_WR_ACPI_FANS: 8403 if (speed >= 0 && speed <= 65535) { 8404 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8405 speed, speed, speed)) 8406 rc = -EIO; 8407 } else 8408 rc = -EINVAL; 8409 break; 8410 8411 default: 8412 rc = -ENXIO; 8413 } 8414 8415 mutex_unlock(&fan_mutex); 8416 return rc; 8417 } 8418 8419 static void fan_watchdog_reset(void) 8420 { 8421 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8422 return; 8423 8424 if (fan_watchdog_maxinterval > 0 && 8425 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8426 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8427 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8428 else 8429 cancel_delayed_work(&fan_watchdog_task); 8430 } 8431 8432 static void fan_watchdog_fire(struct work_struct *ignored) 8433 { 8434 int rc; 8435 8436 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8437 return; 8438 8439 pr_notice("fan watchdog: enabling fan\n"); 8440 rc = fan_set_enable(); 8441 if (rc < 0) { 8442 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n", 8443 rc); 8444 /* reschedule for later */ 8445 fan_watchdog_reset(); 8446 } 8447 } 8448 8449 /* 8450 * SYSFS fan layout: hwmon compatible (device) 8451 * 8452 * pwm*_enable: 8453 * 0: "disengaged" mode 8454 * 1: manual mode 8455 * 2: native EC "auto" mode (recommended, hardware default) 8456 * 8457 * pwm*: set speed in manual mode, ignored otherwise. 8458 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8459 * interpolation. 8460 * 8461 * fan*_input: tachometer reading, RPM 8462 * 8463 * 8464 * SYSFS fan layout: extensions 8465 * 8466 * fan_watchdog (driver): 8467 * fan watchdog interval in seconds, 0 disables (default), max 120 8468 */ 8469 8470 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8471 static ssize_t fan_pwm1_enable_show(struct device *dev, 8472 struct device_attribute *attr, 8473 char *buf) 8474 { 8475 int res, mode; 8476 u8 status; 8477 8478 res = fan_get_status_safe(&status); 8479 if (res) 8480 return res; 8481 8482 if (status & TP_EC_FAN_FULLSPEED) { 8483 mode = 0; 8484 } else if (status & TP_EC_FAN_AUTO) { 8485 mode = 2; 8486 } else 8487 mode = 1; 8488 8489 return sysfs_emit(buf, "%d\n", mode); 8490 } 8491 8492 static ssize_t fan_pwm1_enable_store(struct device *dev, 8493 struct device_attribute *attr, 8494 const char *buf, size_t count) 8495 { 8496 unsigned long t; 8497 int res, level; 8498 8499 if (parse_strtoul(buf, 2, &t)) 8500 return -EINVAL; 8501 8502 tpacpi_disclose_usertask("hwmon pwm1_enable", 8503 "set fan mode to %lu\n", t); 8504 8505 switch (t) { 8506 case 0: 8507 level = TP_EC_FAN_FULLSPEED; 8508 break; 8509 case 1: 8510 level = TPACPI_FAN_LAST_LEVEL; 8511 break; 8512 case 2: 8513 level = TP_EC_FAN_AUTO; 8514 break; 8515 case 3: 8516 /* reserved for software-controlled auto mode */ 8517 return -ENOSYS; 8518 default: 8519 return -EINVAL; 8520 } 8521 8522 res = fan_set_level_safe(level); 8523 if (res == -ENXIO) 8524 return -EINVAL; 8525 else if (res < 0) 8526 return res; 8527 8528 fan_watchdog_reset(); 8529 8530 return count; 8531 } 8532 8533 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8534 fan_pwm1_enable_show, fan_pwm1_enable_store); 8535 8536 /* sysfs fan pwm1 ------------------------------------------------------ */ 8537 static ssize_t fan_pwm1_show(struct device *dev, 8538 struct device_attribute *attr, 8539 char *buf) 8540 { 8541 int res; 8542 u8 status; 8543 8544 res = fan_get_status_safe(&status); 8545 if (res) 8546 return res; 8547 8548 if ((status & 8549 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8550 status = fan_control_desired_level; 8551 8552 if (status > 7) 8553 status = 7; 8554 8555 return sysfs_emit(buf, "%u\n", (status * 255) / 7); 8556 } 8557 8558 static ssize_t fan_pwm1_store(struct device *dev, 8559 struct device_attribute *attr, 8560 const char *buf, size_t count) 8561 { 8562 unsigned long s; 8563 int rc; 8564 u8 status, newlevel; 8565 8566 if (parse_strtoul(buf, 255, &s)) 8567 return -EINVAL; 8568 8569 tpacpi_disclose_usertask("hwmon pwm1", 8570 "set fan speed to %lu\n", s); 8571 8572 /* scale down from 0-255 to 0-7 */ 8573 newlevel = (s >> 5) & 0x07; 8574 8575 if (mutex_lock_killable(&fan_mutex)) 8576 return -ERESTARTSYS; 8577 8578 rc = fan_get_status(&status); 8579 if (!rc && (status & 8580 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8581 rc = fan_set_level(newlevel); 8582 if (rc == -ENXIO) 8583 rc = -EINVAL; 8584 else if (!rc) { 8585 fan_update_desired_level(newlevel); 8586 fan_watchdog_reset(); 8587 } 8588 } 8589 8590 mutex_unlock(&fan_mutex); 8591 return (rc) ? rc : count; 8592 } 8593 8594 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8595 8596 /* sysfs fan fan1_input ------------------------------------------------ */ 8597 static ssize_t fan_fan1_input_show(struct device *dev, 8598 struct device_attribute *attr, 8599 char *buf) 8600 { 8601 int res; 8602 unsigned int speed; 8603 8604 res = fan_get_speed(&speed); 8605 if (res < 0) 8606 return res; 8607 8608 return sysfs_emit(buf, "%u\n", speed); 8609 } 8610 8611 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8612 8613 /* sysfs fan fan2_input ------------------------------------------------ */ 8614 static ssize_t fan_fan2_input_show(struct device *dev, 8615 struct device_attribute *attr, 8616 char *buf) 8617 { 8618 int res; 8619 unsigned int speed; 8620 8621 res = fan2_get_speed(&speed); 8622 if (res < 0) 8623 return res; 8624 8625 return sysfs_emit(buf, "%u\n", speed); 8626 } 8627 8628 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8629 8630 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8631 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf) 8632 { 8633 return sysfs_emit(buf, "%u\n", fan_watchdog_maxinterval); 8634 } 8635 8636 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf, 8637 size_t count) 8638 { 8639 unsigned long t; 8640 8641 if (parse_strtoul(buf, 120, &t)) 8642 return -EINVAL; 8643 8644 if (!fan_control_allowed) 8645 return -EPERM; 8646 8647 fan_watchdog_maxinterval = t; 8648 fan_watchdog_reset(); 8649 8650 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8651 8652 return count; 8653 } 8654 static DRIVER_ATTR_RW(fan_watchdog); 8655 8656 /* --------------------------------------------------------------------- */ 8657 8658 static struct attribute *fan_attributes[] = { 8659 &dev_attr_pwm1_enable.attr, 8660 &dev_attr_pwm1.attr, 8661 &dev_attr_fan1_input.attr, 8662 &dev_attr_fan2_input.attr, 8663 NULL 8664 }; 8665 8666 static umode_t fan_attr_is_visible(struct kobject *kobj, struct attribute *attr, 8667 int n) 8668 { 8669 if (fan_status_access_mode == TPACPI_FAN_NONE && 8670 fan_control_access_mode == TPACPI_FAN_WR_NONE) 8671 return 0; 8672 8673 if (attr == &dev_attr_fan2_input.attr) { 8674 if (!tp_features.second_fan) 8675 return 0; 8676 } 8677 8678 return attr->mode; 8679 } 8680 8681 static const struct attribute_group fan_attr_group = { 8682 .is_visible = fan_attr_is_visible, 8683 .attrs = fan_attributes, 8684 }; 8685 8686 static struct attribute *fan_driver_attributes[] = { 8687 &driver_attr_fan_watchdog.attr, 8688 NULL 8689 }; 8690 8691 static const struct attribute_group fan_driver_attr_group = { 8692 .is_visible = fan_attr_is_visible, 8693 .attrs = fan_driver_attributes, 8694 }; 8695 8696 #define TPACPI_FAN_Q1 0x0001 /* Uninitialized HFSP */ 8697 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8698 #define TPACPI_FAN_2CTL 0x0004 /* selects fan2 control */ 8699 #define TPACPI_FAN_NOFAN 0x0008 /* no fan available */ 8700 8701 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8702 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1), 8703 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1), 8704 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1), 8705 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1), 8706 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN), 8707 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN), 8708 TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL), /* P70 */ 8709 TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL), /* P50 */ 8710 TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL), /* P71 */ 8711 TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL), /* P51 */ 8712 TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL), /* P52 / P72 */ 8713 TPACPI_Q_LNV3('N', '2', 'N', TPACPI_FAN_2CTL), /* P53 / P73 */ 8714 TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (1st gen) */ 8715 TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (2nd gen) */ 8716 TPACPI_Q_LNV3('N', '3', '0', TPACPI_FAN_2CTL), /* P15 (1st gen) / P15v (1st gen) */ 8717 TPACPI_Q_LNV3('N', '3', '7', TPACPI_FAN_2CTL), /* T15g (2nd gen) */ 8718 TPACPI_Q_LNV3('N', '1', 'O', TPACPI_FAN_NOFAN), /* X1 Tablet (2nd gen) */ 8719 }; 8720 8721 static int __init fan_init(struct ibm_init_struct *iibm) 8722 { 8723 unsigned long quirks; 8724 8725 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8726 "initializing fan subdriver\n"); 8727 8728 mutex_init(&fan_mutex); 8729 fan_status_access_mode = TPACPI_FAN_NONE; 8730 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8731 fan_control_commands = 0; 8732 fan_watchdog_maxinterval = 0; 8733 tp_features.fan_ctrl_status_undef = 0; 8734 tp_features.second_fan = 0; 8735 tp_features.second_fan_ctl = 0; 8736 fan_control_desired_level = 7; 8737 8738 if (tpacpi_is_ibm()) { 8739 TPACPI_ACPIHANDLE_INIT(fans); 8740 TPACPI_ACPIHANDLE_INIT(gfan); 8741 TPACPI_ACPIHANDLE_INIT(sfan); 8742 } 8743 8744 quirks = tpacpi_check_quirks(fan_quirk_table, 8745 ARRAY_SIZE(fan_quirk_table)); 8746 8747 if (quirks & TPACPI_FAN_NOFAN) { 8748 pr_info("No integrated ThinkPad fan available\n"); 8749 return -ENODEV; 8750 } 8751 8752 if (gfan_handle) { 8753 /* 570, 600e/x, 770e, 770x */ 8754 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8755 } else { 8756 /* all other ThinkPads: note that even old-style 8757 * ThinkPad ECs supports the fan control register */ 8758 if (likely(acpi_ec_read(fan_status_offset, 8759 &fan_control_initial_status))) { 8760 int res; 8761 unsigned int speed; 8762 8763 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8764 if (quirks & TPACPI_FAN_Q1) 8765 fan_quirk1_setup(); 8766 /* Try and probe the 2nd fan */ 8767 tp_features.second_fan = 1; /* needed for get_speed to work */ 8768 res = fan2_get_speed(&speed); 8769 if (res >= 0 && speed != FAN_NOT_PRESENT) { 8770 /* It responded - so let's assume it's there */ 8771 tp_features.second_fan = 1; 8772 tp_features.second_fan_ctl = 1; 8773 pr_info("secondary fan control detected & enabled\n"); 8774 } else { 8775 /* Fan not auto-detected */ 8776 tp_features.second_fan = 0; 8777 if (quirks & TPACPI_FAN_2FAN) { 8778 tp_features.second_fan = 1; 8779 pr_info("secondary fan support enabled\n"); 8780 } 8781 if (quirks & TPACPI_FAN_2CTL) { 8782 tp_features.second_fan = 1; 8783 tp_features.second_fan_ctl = 1; 8784 pr_info("secondary fan control enabled\n"); 8785 } 8786 } 8787 } else { 8788 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n"); 8789 return -ENODEV; 8790 } 8791 } 8792 8793 if (sfan_handle) { 8794 /* 570, 770x-JL */ 8795 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8796 fan_control_commands |= 8797 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8798 } else { 8799 if (!gfan_handle) { 8800 /* gfan without sfan means no fan control */ 8801 /* all other models implement TP EC 0x2f control */ 8802 8803 if (fans_handle) { 8804 /* X31, X40, X41 */ 8805 fan_control_access_mode = 8806 TPACPI_FAN_WR_ACPI_FANS; 8807 fan_control_commands |= 8808 TPACPI_FAN_CMD_SPEED | 8809 TPACPI_FAN_CMD_LEVEL | 8810 TPACPI_FAN_CMD_ENABLE; 8811 } else { 8812 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8813 fan_control_commands |= 8814 TPACPI_FAN_CMD_LEVEL | 8815 TPACPI_FAN_CMD_ENABLE; 8816 } 8817 } 8818 } 8819 8820 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8821 "fan is %s, modes %d, %d\n", 8822 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8823 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8824 fan_status_access_mode, fan_control_access_mode); 8825 8826 /* fan control master switch */ 8827 if (!fan_control_allowed) { 8828 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8829 fan_control_commands = 0; 8830 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8831 "fan control features disabled by parameter\n"); 8832 } 8833 8834 /* update fan_control_desired_level */ 8835 if (fan_status_access_mode != TPACPI_FAN_NONE) 8836 fan_get_status_safe(NULL); 8837 8838 if (fan_status_access_mode == TPACPI_FAN_NONE && 8839 fan_control_access_mode == TPACPI_FAN_WR_NONE) 8840 return -ENODEV; 8841 8842 return 0; 8843 } 8844 8845 static void fan_exit(void) 8846 { 8847 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8848 "cancelling any pending fan watchdog tasks\n"); 8849 8850 cancel_delayed_work(&fan_watchdog_task); 8851 flush_workqueue(tpacpi_wq); 8852 } 8853 8854 static void fan_suspend(void) 8855 { 8856 int rc; 8857 8858 if (!fan_control_allowed) 8859 return; 8860 8861 /* Store fan status in cache */ 8862 fan_control_resume_level = 0; 8863 rc = fan_get_status_safe(&fan_control_resume_level); 8864 if (rc) 8865 pr_notice("failed to read fan level for later restore during resume: %d\n", 8866 rc); 8867 8868 /* if it is undefined, don't attempt to restore it. 8869 * KEEP THIS LAST */ 8870 if (tp_features.fan_ctrl_status_undef) 8871 fan_control_resume_level = 0; 8872 } 8873 8874 static void fan_resume(void) 8875 { 8876 u8 current_level = 7; 8877 bool do_set = false; 8878 int rc; 8879 8880 /* DSDT *always* updates status on resume */ 8881 tp_features.fan_ctrl_status_undef = 0; 8882 8883 if (!fan_control_allowed || 8884 !fan_control_resume_level || 8885 fan_get_status_safe(¤t_level)) 8886 return; 8887 8888 switch (fan_control_access_mode) { 8889 case TPACPI_FAN_WR_ACPI_SFAN: 8890 /* never decrease fan level */ 8891 do_set = (fan_control_resume_level > current_level); 8892 break; 8893 case TPACPI_FAN_WR_ACPI_FANS: 8894 case TPACPI_FAN_WR_TPEC: 8895 /* never decrease fan level, scale is: 8896 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8897 * 8898 * We expect the firmware to set either 7 or AUTO, but we 8899 * handle FULLSPEED out of paranoia. 8900 * 8901 * So, we can safely only restore FULLSPEED or 7, anything 8902 * else could slow the fan. Restoring AUTO is useless, at 8903 * best that's exactly what the DSDT already set (it is the 8904 * slower it uses). 8905 * 8906 * Always keep in mind that the DSDT *will* have set the 8907 * fans to what the vendor supposes is the best level. We 8908 * muck with it only to speed the fan up. 8909 */ 8910 if (fan_control_resume_level != 7 && 8911 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8912 return; 8913 else 8914 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8915 (current_level != fan_control_resume_level); 8916 break; 8917 default: 8918 return; 8919 } 8920 if (do_set) { 8921 pr_notice("restoring fan level to 0x%02x\n", 8922 fan_control_resume_level); 8923 rc = fan_set_level_safe(fan_control_resume_level); 8924 if (rc < 0) 8925 pr_notice("failed to restore fan level: %d\n", rc); 8926 } 8927 } 8928 8929 static int fan_read(struct seq_file *m) 8930 { 8931 int rc; 8932 u8 status; 8933 unsigned int speed = 0; 8934 8935 switch (fan_status_access_mode) { 8936 case TPACPI_FAN_RD_ACPI_GFAN: 8937 /* 570, 600e/x, 770e, 770x */ 8938 rc = fan_get_status_safe(&status); 8939 if (rc) 8940 return rc; 8941 8942 seq_printf(m, "status:\t\t%s\n" 8943 "level:\t\t%d\n", 8944 str_enabled_disabled(status), status); 8945 break; 8946 8947 case TPACPI_FAN_RD_TPEC: 8948 /* all except 570, 600e/x, 770e, 770x */ 8949 rc = fan_get_status_safe(&status); 8950 if (rc) 8951 return rc; 8952 8953 seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status)); 8954 8955 rc = fan_get_speed(&speed); 8956 if (rc < 0) 8957 return rc; 8958 8959 seq_printf(m, "speed:\t\t%d\n", speed); 8960 8961 if (status & TP_EC_FAN_FULLSPEED) 8962 /* Disengaged mode takes precedence */ 8963 seq_printf(m, "level:\t\tdisengaged\n"); 8964 else if (status & TP_EC_FAN_AUTO) 8965 seq_printf(m, "level:\t\tauto\n"); 8966 else 8967 seq_printf(m, "level:\t\t%d\n", status); 8968 break; 8969 8970 case TPACPI_FAN_NONE: 8971 default: 8972 seq_printf(m, "status:\t\tnot supported\n"); 8973 } 8974 8975 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8976 seq_printf(m, "commands:\tlevel <level>"); 8977 8978 switch (fan_control_access_mode) { 8979 case TPACPI_FAN_WR_ACPI_SFAN: 8980 seq_printf(m, " (<level> is 0-7)\n"); 8981 break; 8982 8983 default: 8984 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n"); 8985 break; 8986 } 8987 } 8988 8989 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8990 seq_printf(m, "commands:\tenable, disable\n" 8991 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n"); 8992 8993 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8994 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n"); 8995 8996 return 0; 8997 } 8998 8999 static int fan_write_cmd_level(const char *cmd, int *rc) 9000 { 9001 int level; 9002 9003 if (strstarts(cmd, "level auto")) 9004 level = TP_EC_FAN_AUTO; 9005 else if (strstarts(cmd, "level disengaged") || strstarts(cmd, "level full-speed")) 9006 level = TP_EC_FAN_FULLSPEED; 9007 else if (sscanf(cmd, "level %d", &level) != 1) 9008 return 0; 9009 9010 *rc = fan_set_level_safe(level); 9011 if (*rc == -ENXIO) 9012 pr_err("level command accepted for unsupported access mode %d\n", 9013 fan_control_access_mode); 9014 else if (!*rc) 9015 tpacpi_disclose_usertask("procfs fan", 9016 "set level to %d\n", level); 9017 9018 return 1; 9019 } 9020 9021 static int fan_write_cmd_enable(const char *cmd, int *rc) 9022 { 9023 if (!strstarts(cmd, "enable")) 9024 return 0; 9025 9026 *rc = fan_set_enable(); 9027 if (*rc == -ENXIO) 9028 pr_err("enable command accepted for unsupported access mode %d\n", 9029 fan_control_access_mode); 9030 else if (!*rc) 9031 tpacpi_disclose_usertask("procfs fan", "enable\n"); 9032 9033 return 1; 9034 } 9035 9036 static int fan_write_cmd_disable(const char *cmd, int *rc) 9037 { 9038 if (!strstarts(cmd, "disable")) 9039 return 0; 9040 9041 *rc = fan_set_disable(); 9042 if (*rc == -ENXIO) 9043 pr_err("disable command accepted for unsupported access mode %d\n", 9044 fan_control_access_mode); 9045 else if (!*rc) 9046 tpacpi_disclose_usertask("procfs fan", "disable\n"); 9047 9048 return 1; 9049 } 9050 9051 static int fan_write_cmd_speed(const char *cmd, int *rc) 9052 { 9053 int speed; 9054 9055 /* TODO: 9056 * Support speed <low> <medium> <high> ? */ 9057 9058 if (sscanf(cmd, "speed %d", &speed) != 1) 9059 return 0; 9060 9061 *rc = fan_set_speed(speed); 9062 if (*rc == -ENXIO) 9063 pr_err("speed command accepted for unsupported access mode %d\n", 9064 fan_control_access_mode); 9065 else if (!*rc) 9066 tpacpi_disclose_usertask("procfs fan", 9067 "set speed to %d\n", speed); 9068 9069 return 1; 9070 } 9071 9072 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 9073 { 9074 int interval; 9075 9076 if (sscanf(cmd, "watchdog %d", &interval) != 1) 9077 return 0; 9078 9079 if (interval < 0 || interval > 120) 9080 *rc = -EINVAL; 9081 else { 9082 fan_watchdog_maxinterval = interval; 9083 tpacpi_disclose_usertask("procfs fan", 9084 "set watchdog timer to %d\n", 9085 interval); 9086 } 9087 9088 return 1; 9089 } 9090 9091 static int fan_write(char *buf) 9092 { 9093 char *cmd; 9094 int rc = 0; 9095 9096 while (!rc && (cmd = strsep(&buf, ","))) { 9097 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 9098 fan_write_cmd_level(cmd, &rc)) && 9099 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 9100 (fan_write_cmd_enable(cmd, &rc) || 9101 fan_write_cmd_disable(cmd, &rc) || 9102 fan_write_cmd_watchdog(cmd, &rc))) && 9103 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 9104 fan_write_cmd_speed(cmd, &rc)) 9105 ) 9106 rc = -EINVAL; 9107 else if (!rc) 9108 fan_watchdog_reset(); 9109 } 9110 9111 return rc; 9112 } 9113 9114 static struct ibm_struct fan_driver_data = { 9115 .name = "fan", 9116 .read = fan_read, 9117 .write = fan_write, 9118 .exit = fan_exit, 9119 .suspend = fan_suspend, 9120 .resume = fan_resume, 9121 }; 9122 9123 /************************************************************************* 9124 * Mute LED subdriver 9125 */ 9126 9127 #define TPACPI_LED_MAX 2 9128 9129 struct tp_led_table { 9130 acpi_string name; 9131 int on_value; 9132 int off_value; 9133 int state; 9134 }; 9135 9136 static struct tp_led_table led_tables[TPACPI_LED_MAX] = { 9137 [LED_AUDIO_MUTE] = { 9138 .name = "SSMS", 9139 .on_value = 1, 9140 .off_value = 0, 9141 }, 9142 [LED_AUDIO_MICMUTE] = { 9143 .name = "MMTS", 9144 .on_value = 2, 9145 .off_value = 0, 9146 }, 9147 }; 9148 9149 static int mute_led_on_off(struct tp_led_table *t, bool state) 9150 { 9151 acpi_handle temp; 9152 int output; 9153 9154 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9155 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9156 return -EIO; 9157 } 9158 9159 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9160 state ? t->on_value : t->off_value)) 9161 return -EIO; 9162 9163 t->state = state; 9164 return state; 9165 } 9166 9167 static int tpacpi_led_set(int whichled, bool on) 9168 { 9169 struct tp_led_table *t; 9170 9171 t = &led_tables[whichled]; 9172 if (t->state < 0 || t->state == on) 9173 return t->state; 9174 return mute_led_on_off(t, on); 9175 } 9176 9177 static int tpacpi_led_mute_set(struct led_classdev *led_cdev, 9178 enum led_brightness brightness) 9179 { 9180 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF); 9181 } 9182 9183 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev, 9184 enum led_brightness brightness) 9185 { 9186 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF); 9187 } 9188 9189 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = { 9190 [LED_AUDIO_MUTE] = { 9191 .name = "platform::mute", 9192 .max_brightness = 1, 9193 .brightness_set_blocking = tpacpi_led_mute_set, 9194 .default_trigger = "audio-mute", 9195 }, 9196 [LED_AUDIO_MICMUTE] = { 9197 .name = "platform::micmute", 9198 .max_brightness = 1, 9199 .brightness_set_blocking = tpacpi_led_micmute_set, 9200 .default_trigger = "audio-micmute", 9201 }, 9202 }; 9203 9204 static int mute_led_init(struct ibm_init_struct *iibm) 9205 { 9206 acpi_handle temp; 9207 int i, err; 9208 9209 for (i = 0; i < TPACPI_LED_MAX; i++) { 9210 struct tp_led_table *t = &led_tables[i]; 9211 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9212 t->state = -ENODEV; 9213 continue; 9214 } 9215 9216 mute_led_cdev[i].brightness = ledtrig_audio_get(i); 9217 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]); 9218 if (err < 0) { 9219 while (i--) 9220 led_classdev_unregister(&mute_led_cdev[i]); 9221 return err; 9222 } 9223 } 9224 return 0; 9225 } 9226 9227 static void mute_led_exit(void) 9228 { 9229 int i; 9230 9231 for (i = 0; i < TPACPI_LED_MAX; i++) { 9232 led_classdev_unregister(&mute_led_cdev[i]); 9233 tpacpi_led_set(i, false); 9234 } 9235 } 9236 9237 static void mute_led_resume(void) 9238 { 9239 int i; 9240 9241 for (i = 0; i < TPACPI_LED_MAX; i++) { 9242 struct tp_led_table *t = &led_tables[i]; 9243 if (t->state >= 0) 9244 mute_led_on_off(t, t->state); 9245 } 9246 } 9247 9248 static struct ibm_struct mute_led_driver_data = { 9249 .name = "mute_led", 9250 .exit = mute_led_exit, 9251 .resume = mute_led_resume, 9252 }; 9253 9254 /* 9255 * Battery Wear Control Driver 9256 * Contact: Ognjen Galic <smclt30p@gmail.com> 9257 */ 9258 9259 /* Metadata */ 9260 9261 #define GET_START "BCTG" 9262 #define SET_START "BCCS" 9263 #define GET_STOP "BCSG" 9264 #define SET_STOP "BCSS" 9265 #define GET_DISCHARGE "BDSG" 9266 #define SET_DISCHARGE "BDSS" 9267 #define GET_INHIBIT "BICG" 9268 #define SET_INHIBIT "BICS" 9269 9270 enum { 9271 BAT_ANY = 0, 9272 BAT_PRIMARY = 1, 9273 BAT_SECONDARY = 2 9274 }; 9275 9276 enum { 9277 /* Error condition bit */ 9278 METHOD_ERR = BIT(31), 9279 }; 9280 9281 enum { 9282 /* This is used in the get/set helpers */ 9283 THRESHOLD_START, 9284 THRESHOLD_STOP, 9285 FORCE_DISCHARGE, 9286 INHIBIT_CHARGE, 9287 }; 9288 9289 struct tpacpi_battery_data { 9290 int charge_start; 9291 int start_support; 9292 int charge_stop; 9293 int stop_support; 9294 unsigned int charge_behaviours; 9295 }; 9296 9297 struct tpacpi_battery_driver_data { 9298 struct tpacpi_battery_data batteries[3]; 9299 int individual_addressing; 9300 }; 9301 9302 static struct tpacpi_battery_driver_data battery_info; 9303 9304 /* ACPI helpers/functions/probes */ 9305 9306 /** 9307 * This evaluates a ACPI method call specific to the battery 9308 * ACPI extension. The specifics are that an error is marked 9309 * in the 32rd bit of the response, so we just check that here. 9310 */ 9311 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param) 9312 { 9313 int response; 9314 9315 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) { 9316 acpi_handle_err(hkey_handle, "%s: evaluate failed", method); 9317 return AE_ERROR; 9318 } 9319 if (response & METHOD_ERR) { 9320 acpi_handle_err(hkey_handle, 9321 "%s evaluated but flagged as error", method); 9322 return AE_ERROR; 9323 } 9324 *ret = response; 9325 return AE_OK; 9326 } 9327 9328 static int tpacpi_battery_get(int what, int battery, int *ret) 9329 { 9330 switch (what) { 9331 case THRESHOLD_START: 9332 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery)) 9333 return -ENODEV; 9334 9335 /* The value is in the low 8 bits of the response */ 9336 *ret = *ret & 0xFF; 9337 return 0; 9338 case THRESHOLD_STOP: 9339 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery)) 9340 return -ENODEV; 9341 /* Value is in lower 8 bits */ 9342 *ret = *ret & 0xFF; 9343 /* 9344 * On the stop value, if we return 0 that 9345 * does not make any sense. 0 means Default, which 9346 * means that charging stops at 100%, so we return 9347 * that. 9348 */ 9349 if (*ret == 0) 9350 *ret = 100; 9351 return 0; 9352 case FORCE_DISCHARGE: 9353 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, ret, battery)) 9354 return -ENODEV; 9355 /* The force discharge status is in bit 0 */ 9356 *ret = *ret & 0x01; 9357 return 0; 9358 case INHIBIT_CHARGE: 9359 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, ret, battery)) 9360 return -ENODEV; 9361 /* The inhibit charge status is in bit 0 */ 9362 *ret = *ret & 0x01; 9363 return 0; 9364 default: 9365 pr_crit("wrong parameter: %d", what); 9366 return -EINVAL; 9367 } 9368 } 9369 9370 static int tpacpi_battery_set(int what, int battery, int value) 9371 { 9372 int param, ret; 9373 /* The first 8 bits are the value of the threshold */ 9374 param = value; 9375 /* The battery ID is in bits 8-9, 2 bits */ 9376 param |= battery << 8; 9377 9378 switch (what) { 9379 case THRESHOLD_START: 9380 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) { 9381 pr_err("failed to set charge threshold on battery %d", 9382 battery); 9383 return -ENODEV; 9384 } 9385 return 0; 9386 case THRESHOLD_STOP: 9387 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) { 9388 pr_err("failed to set stop threshold: %d", battery); 9389 return -ENODEV; 9390 } 9391 return 0; 9392 case FORCE_DISCHARGE: 9393 /* Force discharge is in bit 0, 9394 * break on AC attach is in bit 1 (won't work on some ThinkPads), 9395 * battery ID is in bits 8-9, 2 bits. 9396 */ 9397 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_DISCHARGE, &ret, param))) { 9398 pr_err("failed to set force discharge on %d", battery); 9399 return -ENODEV; 9400 } 9401 return 0; 9402 case INHIBIT_CHARGE: 9403 /* When setting inhibit charge, we set a default value of 9404 * always breaking on AC detach and the effective time is set to 9405 * be permanent. 9406 * The battery ID is in bits 4-5, 2 bits, 9407 * the effective time is in bits 8-23, 2 bytes. 9408 * A time of FFFF indicates forever. 9409 */ 9410 param = value; 9411 param |= battery << 4; 9412 param |= 0xFFFF << 8; 9413 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_INHIBIT, &ret, param))) { 9414 pr_err("failed to set inhibit charge on %d", battery); 9415 return -ENODEV; 9416 } 9417 return 0; 9418 default: 9419 pr_crit("wrong parameter: %d", what); 9420 return -EINVAL; 9421 } 9422 } 9423 9424 static int tpacpi_battery_set_validate(int what, int battery, int value) 9425 { 9426 int ret, v; 9427 9428 ret = tpacpi_battery_set(what, battery, value); 9429 if (ret < 0) 9430 return ret; 9431 9432 ret = tpacpi_battery_get(what, battery, &v); 9433 if (ret < 0) 9434 return ret; 9435 9436 if (v == value) 9437 return 0; 9438 9439 msleep(500); 9440 9441 ret = tpacpi_battery_get(what, battery, &v); 9442 if (ret < 0) 9443 return ret; 9444 9445 if (v == value) 9446 return 0; 9447 9448 return -EIO; 9449 } 9450 9451 static int tpacpi_battery_probe(int battery) 9452 { 9453 int ret = 0; 9454 9455 memset(&battery_info.batteries[battery], 0, 9456 sizeof(battery_info.batteries[battery])); 9457 9458 /* 9459 * 1) Get the current start threshold 9460 * 2) Check for support 9461 * 3) Get the current stop threshold 9462 * 4) Check for support 9463 * 5) Get the current force discharge status 9464 * 6) Check for support 9465 * 7) Get the current inhibit charge status 9466 * 8) Check for support 9467 */ 9468 if (acpi_has_method(hkey_handle, GET_START)) { 9469 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { 9470 pr_err("Error probing battery %d\n", battery); 9471 return -ENODEV; 9472 } 9473 /* Individual addressing is in bit 9 */ 9474 if (ret & BIT(9)) 9475 battery_info.individual_addressing = true; 9476 /* Support is marked in bit 8 */ 9477 if (ret & BIT(8)) 9478 battery_info.batteries[battery].start_support = 1; 9479 else 9480 return -ENODEV; 9481 if (tpacpi_battery_get(THRESHOLD_START, battery, 9482 &battery_info.batteries[battery].charge_start)) { 9483 pr_err("Error probing battery %d\n", battery); 9484 return -ENODEV; 9485 } 9486 } 9487 if (acpi_has_method(hkey_handle, GET_STOP)) { 9488 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) { 9489 pr_err("Error probing battery stop; %d\n", battery); 9490 return -ENODEV; 9491 } 9492 /* Support is marked in bit 8 */ 9493 if (ret & BIT(8)) 9494 battery_info.batteries[battery].stop_support = 1; 9495 else 9496 return -ENODEV; 9497 if (tpacpi_battery_get(THRESHOLD_STOP, battery, 9498 &battery_info.batteries[battery].charge_stop)) { 9499 pr_err("Error probing battery stop: %d\n", battery); 9500 return -ENODEV; 9501 } 9502 } 9503 if (acpi_has_method(hkey_handle, GET_DISCHARGE)) { 9504 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, &ret, battery))) { 9505 pr_err("Error probing battery discharge; %d\n", battery); 9506 return -ENODEV; 9507 } 9508 /* Support is marked in bit 8 */ 9509 if (ret & BIT(8)) 9510 battery_info.batteries[battery].charge_behaviours |= 9511 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE); 9512 } 9513 if (acpi_has_method(hkey_handle, GET_INHIBIT)) { 9514 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, &ret, battery))) { 9515 pr_err("Error probing battery inhibit charge; %d\n", battery); 9516 return -ENODEV; 9517 } 9518 /* Support is marked in bit 5 */ 9519 if (ret & BIT(5)) 9520 battery_info.batteries[battery].charge_behaviours |= 9521 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE); 9522 } 9523 9524 battery_info.batteries[battery].charge_behaviours |= 9525 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO); 9526 9527 pr_info("battery %d registered (start %d, stop %d, behaviours: 0x%x)\n", 9528 battery, 9529 battery_info.batteries[battery].charge_start, 9530 battery_info.batteries[battery].charge_stop, 9531 battery_info.batteries[battery].charge_behaviours); 9532 9533 return 0; 9534 } 9535 9536 /* General helper functions */ 9537 9538 static int tpacpi_battery_get_id(const char *battery_name) 9539 { 9540 9541 if (strcmp(battery_name, "BAT0") == 0 || 9542 tp_features.battery_force_primary) 9543 return BAT_PRIMARY; 9544 if (strcmp(battery_name, "BAT1") == 0) 9545 return BAT_SECONDARY; 9546 /* 9547 * If for some reason the battery is not BAT0 nor is it 9548 * BAT1, we will assume it's the default, first battery, 9549 * AKA primary. 9550 */ 9551 pr_warn("unknown battery %s, assuming primary", battery_name); 9552 return BAT_PRIMARY; 9553 } 9554 9555 /* sysfs interface */ 9556 9557 static ssize_t tpacpi_battery_store(int what, 9558 struct device *dev, 9559 const char *buf, size_t count) 9560 { 9561 struct power_supply *supply = to_power_supply(dev); 9562 unsigned long value; 9563 int battery, rval; 9564 /* 9565 * Some systems have support for more than 9566 * one battery. If that is the case, 9567 * tpacpi_battery_probe marked that addressing 9568 * them individually is supported, so we do that 9569 * based on the device struct. 9570 * 9571 * On systems that are not supported, we assume 9572 * the primary as most of the ACPI calls fail 9573 * with "Any Battery" as the parameter. 9574 */ 9575 if (battery_info.individual_addressing) 9576 /* BAT_PRIMARY or BAT_SECONDARY */ 9577 battery = tpacpi_battery_get_id(supply->desc->name); 9578 else 9579 battery = BAT_PRIMARY; 9580 9581 rval = kstrtoul(buf, 10, &value); 9582 if (rval) 9583 return rval; 9584 9585 switch (what) { 9586 case THRESHOLD_START: 9587 if (!battery_info.batteries[battery].start_support) 9588 return -ENODEV; 9589 /* valid values are [0, 99] */ 9590 if (value > 99) 9591 return -EINVAL; 9592 if (value > battery_info.batteries[battery].charge_stop) 9593 return -EINVAL; 9594 if (tpacpi_battery_set(THRESHOLD_START, battery, value)) 9595 return -ENODEV; 9596 battery_info.batteries[battery].charge_start = value; 9597 return count; 9598 9599 case THRESHOLD_STOP: 9600 if (!battery_info.batteries[battery].stop_support) 9601 return -ENODEV; 9602 /* valid values are [1, 100] */ 9603 if (value < 1 || value > 100) 9604 return -EINVAL; 9605 if (value < battery_info.batteries[battery].charge_start) 9606 return -EINVAL; 9607 battery_info.batteries[battery].charge_stop = value; 9608 /* 9609 * When 100 is passed to stop, we need to flip 9610 * it to 0 as that the EC understands that as 9611 * "Default", which will charge to 100% 9612 */ 9613 if (value == 100) 9614 value = 0; 9615 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value)) 9616 return -EINVAL; 9617 return count; 9618 default: 9619 pr_crit("Wrong parameter: %d", what); 9620 return -EINVAL; 9621 } 9622 return count; 9623 } 9624 9625 static ssize_t tpacpi_battery_show(int what, 9626 struct device *dev, 9627 char *buf) 9628 { 9629 struct power_supply *supply = to_power_supply(dev); 9630 int ret, battery; 9631 /* 9632 * Some systems have support for more than 9633 * one battery. If that is the case, 9634 * tpacpi_battery_probe marked that addressing 9635 * them individually is supported, so we; 9636 * based on the device struct. 9637 * 9638 * On systems that are not supported, we assume 9639 * the primary as most of the ACPI calls fail 9640 * with "Any Battery" as the parameter. 9641 */ 9642 if (battery_info.individual_addressing) 9643 /* BAT_PRIMARY or BAT_SECONDARY */ 9644 battery = tpacpi_battery_get_id(supply->desc->name); 9645 else 9646 battery = BAT_PRIMARY; 9647 if (tpacpi_battery_get(what, battery, &ret)) 9648 return -ENODEV; 9649 return sprintf(buf, "%d\n", ret); 9650 } 9651 9652 static ssize_t charge_control_start_threshold_show(struct device *device, 9653 struct device_attribute *attr, 9654 char *buf) 9655 { 9656 return tpacpi_battery_show(THRESHOLD_START, device, buf); 9657 } 9658 9659 static ssize_t charge_control_end_threshold_show(struct device *device, 9660 struct device_attribute *attr, 9661 char *buf) 9662 { 9663 return tpacpi_battery_show(THRESHOLD_STOP, device, buf); 9664 } 9665 9666 static ssize_t charge_behaviour_show(struct device *dev, 9667 struct device_attribute *attr, 9668 char *buf) 9669 { 9670 enum power_supply_charge_behaviour active = POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO; 9671 struct power_supply *supply = to_power_supply(dev); 9672 unsigned int available; 9673 int ret, battery; 9674 9675 battery = tpacpi_battery_get_id(supply->desc->name); 9676 available = battery_info.batteries[battery].charge_behaviours; 9677 9678 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) { 9679 if (tpacpi_battery_get(FORCE_DISCHARGE, battery, &ret)) 9680 return -ENODEV; 9681 if (ret) { 9682 active = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE; 9683 goto out; 9684 } 9685 } 9686 9687 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) { 9688 if (tpacpi_battery_get(INHIBIT_CHARGE, battery, &ret)) 9689 return -ENODEV; 9690 if (ret) { 9691 active = POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE; 9692 goto out; 9693 } 9694 } 9695 9696 out: 9697 return power_supply_charge_behaviour_show(dev, available, active, buf); 9698 } 9699 9700 static ssize_t charge_control_start_threshold_store(struct device *dev, 9701 struct device_attribute *attr, 9702 const char *buf, size_t count) 9703 { 9704 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count); 9705 } 9706 9707 static ssize_t charge_control_end_threshold_store(struct device *dev, 9708 struct device_attribute *attr, 9709 const char *buf, size_t count) 9710 { 9711 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count); 9712 } 9713 9714 static ssize_t charge_behaviour_store(struct device *dev, 9715 struct device_attribute *attr, 9716 const char *buf, size_t count) 9717 { 9718 struct power_supply *supply = to_power_supply(dev); 9719 int selected, battery, ret = 0; 9720 unsigned int available; 9721 9722 battery = tpacpi_battery_get_id(supply->desc->name); 9723 available = battery_info.batteries[battery].charge_behaviours; 9724 selected = power_supply_charge_behaviour_parse(available, buf); 9725 9726 if (selected < 0) 9727 return selected; 9728 9729 switch (selected) { 9730 case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO: 9731 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) 9732 ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0); 9733 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) 9734 ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0)); 9735 if (ret < 0) 9736 return ret; 9737 break; 9738 case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE: 9739 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) 9740 ret = tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0); 9741 ret = min(ret, tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1)); 9742 if (ret < 0) 9743 return ret; 9744 break; 9745 case POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE: 9746 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) 9747 ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0); 9748 ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 1)); 9749 if (ret < 0) 9750 return ret; 9751 break; 9752 default: 9753 dev_err(dev, "Unexpected charge behaviour: %d\n", selected); 9754 return -EINVAL; 9755 } 9756 9757 return count; 9758 } 9759 9760 static DEVICE_ATTR_RW(charge_control_start_threshold); 9761 static DEVICE_ATTR_RW(charge_control_end_threshold); 9762 static DEVICE_ATTR_RW(charge_behaviour); 9763 static struct device_attribute dev_attr_charge_start_threshold = __ATTR( 9764 charge_start_threshold, 9765 0644, 9766 charge_control_start_threshold_show, 9767 charge_control_start_threshold_store 9768 ); 9769 static struct device_attribute dev_attr_charge_stop_threshold = __ATTR( 9770 charge_stop_threshold, 9771 0644, 9772 charge_control_end_threshold_show, 9773 charge_control_end_threshold_store 9774 ); 9775 9776 static struct attribute *tpacpi_battery_attrs[] = { 9777 &dev_attr_charge_control_start_threshold.attr, 9778 &dev_attr_charge_control_end_threshold.attr, 9779 &dev_attr_charge_start_threshold.attr, 9780 &dev_attr_charge_stop_threshold.attr, 9781 &dev_attr_charge_behaviour.attr, 9782 NULL, 9783 }; 9784 9785 ATTRIBUTE_GROUPS(tpacpi_battery); 9786 9787 /* ACPI battery hooking */ 9788 9789 static int tpacpi_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook) 9790 { 9791 int batteryid = tpacpi_battery_get_id(battery->desc->name); 9792 9793 if (tpacpi_battery_probe(batteryid)) 9794 return -ENODEV; 9795 if (device_add_groups(&battery->dev, tpacpi_battery_groups)) 9796 return -ENODEV; 9797 return 0; 9798 } 9799 9800 static int tpacpi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook) 9801 { 9802 device_remove_groups(&battery->dev, tpacpi_battery_groups); 9803 return 0; 9804 } 9805 9806 static struct acpi_battery_hook battery_hook = { 9807 .add_battery = tpacpi_battery_add, 9808 .remove_battery = tpacpi_battery_remove, 9809 .name = "ThinkPad Battery Extension", 9810 }; 9811 9812 /* Subdriver init/exit */ 9813 9814 static const struct tpacpi_quirk battery_quirk_table[] __initconst = { 9815 /* 9816 * Individual addressing is broken on models that expose the 9817 * primary battery as BAT1. 9818 */ 9819 TPACPI_Q_LNV('J', '7', true), /* B5400 */ 9820 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */ 9821 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */ 9822 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */ 9823 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */ 9824 TPACPI_Q_LNV3('R', '0', 'K', true), /* Thinkpad 11e gen 4 celeron BIOS */ 9825 }; 9826 9827 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm) 9828 { 9829 memset(&battery_info, 0, sizeof(battery_info)); 9830 9831 tp_features.battery_force_primary = tpacpi_check_quirks( 9832 battery_quirk_table, 9833 ARRAY_SIZE(battery_quirk_table)); 9834 9835 battery_hook_register(&battery_hook); 9836 return 0; 9837 } 9838 9839 static void tpacpi_battery_exit(void) 9840 { 9841 battery_hook_unregister(&battery_hook); 9842 } 9843 9844 static struct ibm_struct battery_driver_data = { 9845 .name = "battery", 9846 .exit = tpacpi_battery_exit, 9847 }; 9848 9849 /************************************************************************* 9850 * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature 9851 */ 9852 9853 static struct drm_privacy_screen *lcdshadow_dev; 9854 static acpi_handle lcdshadow_get_handle; 9855 static acpi_handle lcdshadow_set_handle; 9856 9857 static int lcdshadow_set_sw_state(struct drm_privacy_screen *priv, 9858 enum drm_privacy_screen_status state) 9859 { 9860 int output; 9861 9862 if (WARN_ON(!mutex_is_locked(&priv->lock))) 9863 return -EIO; 9864 9865 if (!acpi_evalf(lcdshadow_set_handle, &output, NULL, "dd", (int)state)) 9866 return -EIO; 9867 9868 priv->hw_state = priv->sw_state = state; 9869 return 0; 9870 } 9871 9872 static void lcdshadow_get_hw_state(struct drm_privacy_screen *priv) 9873 { 9874 int output; 9875 9876 if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0)) 9877 return; 9878 9879 priv->hw_state = priv->sw_state = output & 0x1; 9880 } 9881 9882 static const struct drm_privacy_screen_ops lcdshadow_ops = { 9883 .set_sw_state = lcdshadow_set_sw_state, 9884 .get_hw_state = lcdshadow_get_hw_state, 9885 }; 9886 9887 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm) 9888 { 9889 acpi_status status1, status2; 9890 int output; 9891 9892 status1 = acpi_get_handle(hkey_handle, "GSSS", &lcdshadow_get_handle); 9893 status2 = acpi_get_handle(hkey_handle, "SSSS", &lcdshadow_set_handle); 9894 if (ACPI_FAILURE(status1) || ACPI_FAILURE(status2)) 9895 return 0; 9896 9897 if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0)) 9898 return -EIO; 9899 9900 if (!(output & 0x10000)) 9901 return 0; 9902 9903 lcdshadow_dev = drm_privacy_screen_register(&tpacpi_pdev->dev, 9904 &lcdshadow_ops, NULL); 9905 if (IS_ERR(lcdshadow_dev)) 9906 return PTR_ERR(lcdshadow_dev); 9907 9908 return 0; 9909 } 9910 9911 static void lcdshadow_exit(void) 9912 { 9913 drm_privacy_screen_unregister(lcdshadow_dev); 9914 } 9915 9916 static void lcdshadow_resume(void) 9917 { 9918 if (!lcdshadow_dev) 9919 return; 9920 9921 mutex_lock(&lcdshadow_dev->lock); 9922 lcdshadow_set_sw_state(lcdshadow_dev, lcdshadow_dev->sw_state); 9923 mutex_unlock(&lcdshadow_dev->lock); 9924 } 9925 9926 static int lcdshadow_read(struct seq_file *m) 9927 { 9928 if (!lcdshadow_dev) { 9929 seq_puts(m, "status:\t\tnot supported\n"); 9930 } else { 9931 seq_printf(m, "status:\t\t%d\n", lcdshadow_dev->hw_state); 9932 seq_puts(m, "commands:\t0, 1\n"); 9933 } 9934 9935 return 0; 9936 } 9937 9938 static int lcdshadow_write(char *buf) 9939 { 9940 char *cmd; 9941 int res, state = -EINVAL; 9942 9943 if (!lcdshadow_dev) 9944 return -ENODEV; 9945 9946 while ((cmd = strsep(&buf, ","))) { 9947 res = kstrtoint(cmd, 10, &state); 9948 if (res < 0) 9949 return res; 9950 } 9951 9952 if (state >= 2 || state < 0) 9953 return -EINVAL; 9954 9955 mutex_lock(&lcdshadow_dev->lock); 9956 res = lcdshadow_set_sw_state(lcdshadow_dev, state); 9957 mutex_unlock(&lcdshadow_dev->lock); 9958 9959 drm_privacy_screen_call_notifier_chain(lcdshadow_dev); 9960 9961 return res; 9962 } 9963 9964 static struct ibm_struct lcdshadow_driver_data = { 9965 .name = "lcdshadow", 9966 .exit = lcdshadow_exit, 9967 .resume = lcdshadow_resume, 9968 .read = lcdshadow_read, 9969 .write = lcdshadow_write, 9970 }; 9971 9972 /************************************************************************* 9973 * Thinkpad sensor interfaces 9974 */ 9975 9976 #define DYTC_CMD_QUERY 0 /* To get DYTC status - enable/revision */ 9977 #define DYTC_QUERY_ENABLE_BIT 8 /* Bit 8 - 0 = disabled, 1 = enabled */ 9978 #define DYTC_QUERY_SUBREV_BIT 16 /* Bits 16 - 27 - sub revision */ 9979 #define DYTC_QUERY_REV_BIT 28 /* Bits 28 - 31 - revision */ 9980 9981 #define DYTC_CMD_GET 2 /* To get current IC function and mode */ 9982 #define DYTC_GET_LAPMODE_BIT 17 /* Set when in lapmode */ 9983 9984 #define PALMSENSOR_PRESENT_BIT 0 /* Determine if psensor present */ 9985 #define PALMSENSOR_ON_BIT 1 /* psensor status */ 9986 9987 static bool has_palmsensor; 9988 static bool has_lapsensor; 9989 static bool palm_state; 9990 static bool lap_state; 9991 static int dytc_version; 9992 9993 static int dytc_command(int command, int *output) 9994 { 9995 acpi_handle dytc_handle; 9996 9997 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DYTC", &dytc_handle))) { 9998 /* Platform doesn't support DYTC */ 9999 return -ENODEV; 10000 } 10001 if (!acpi_evalf(dytc_handle, output, NULL, "dd", command)) 10002 return -EIO; 10003 return 0; 10004 } 10005 10006 static int lapsensor_get(bool *present, bool *state) 10007 { 10008 int output, err; 10009 10010 *present = false; 10011 err = dytc_command(DYTC_CMD_GET, &output); 10012 if (err) 10013 return err; 10014 10015 *present = true; /*If we get his far, we have lapmode support*/ 10016 *state = output & BIT(DYTC_GET_LAPMODE_BIT) ? true : false; 10017 return 0; 10018 } 10019 10020 static int palmsensor_get(bool *present, bool *state) 10021 { 10022 acpi_handle psensor_handle; 10023 int output; 10024 10025 *present = false; 10026 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GPSS", &psensor_handle))) 10027 return -ENODEV; 10028 if (!acpi_evalf(psensor_handle, &output, NULL, "d")) 10029 return -EIO; 10030 10031 *present = output & BIT(PALMSENSOR_PRESENT_BIT) ? true : false; 10032 *state = output & BIT(PALMSENSOR_ON_BIT) ? true : false; 10033 return 0; 10034 } 10035 10036 static void lapsensor_refresh(void) 10037 { 10038 bool state; 10039 int err; 10040 10041 if (has_lapsensor) { 10042 err = lapsensor_get(&has_lapsensor, &state); 10043 if (err) 10044 return; 10045 if (lap_state != state) { 10046 lap_state = state; 10047 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "dytc_lapmode"); 10048 } 10049 } 10050 } 10051 10052 static void palmsensor_refresh(void) 10053 { 10054 bool state; 10055 int err; 10056 10057 if (has_palmsensor) { 10058 err = palmsensor_get(&has_palmsensor, &state); 10059 if (err) 10060 return; 10061 if (palm_state != state) { 10062 palm_state = state; 10063 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "palmsensor"); 10064 } 10065 } 10066 } 10067 10068 static ssize_t dytc_lapmode_show(struct device *dev, 10069 struct device_attribute *attr, 10070 char *buf) 10071 { 10072 if (has_lapsensor) 10073 return sysfs_emit(buf, "%d\n", lap_state); 10074 return sysfs_emit(buf, "\n"); 10075 } 10076 static DEVICE_ATTR_RO(dytc_lapmode); 10077 10078 static ssize_t palmsensor_show(struct device *dev, 10079 struct device_attribute *attr, 10080 char *buf) 10081 { 10082 if (has_palmsensor) 10083 return sysfs_emit(buf, "%d\n", palm_state); 10084 return sysfs_emit(buf, "\n"); 10085 } 10086 static DEVICE_ATTR_RO(palmsensor); 10087 10088 static struct attribute *proxsensor_attributes[] = { 10089 &dev_attr_dytc_lapmode.attr, 10090 &dev_attr_palmsensor.attr, 10091 NULL 10092 }; 10093 10094 static umode_t proxsensor_attr_is_visible(struct kobject *kobj, 10095 struct attribute *attr, int n) 10096 { 10097 if (attr == &dev_attr_dytc_lapmode.attr) { 10098 /* 10099 * Platforms before DYTC version 5 claim to have a lap sensor, 10100 * but it doesn't work, so we ignore them. 10101 */ 10102 if (!has_lapsensor || dytc_version < 5) 10103 return 0; 10104 } else if (attr == &dev_attr_palmsensor.attr) { 10105 if (!has_palmsensor) 10106 return 0; 10107 } 10108 10109 return attr->mode; 10110 } 10111 10112 static const struct attribute_group proxsensor_attr_group = { 10113 .is_visible = proxsensor_attr_is_visible, 10114 .attrs = proxsensor_attributes, 10115 }; 10116 10117 static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm) 10118 { 10119 int palm_err, lap_err; 10120 10121 palm_err = palmsensor_get(&has_palmsensor, &palm_state); 10122 lap_err = lapsensor_get(&has_lapsensor, &lap_state); 10123 /* If support isn't available for both devices return -ENODEV */ 10124 if ((palm_err == -ENODEV) && (lap_err == -ENODEV)) 10125 return -ENODEV; 10126 /* Otherwise, if there was an error return it */ 10127 if (palm_err && (palm_err != -ENODEV)) 10128 return palm_err; 10129 if (lap_err && (lap_err != -ENODEV)) 10130 return lap_err; 10131 10132 return 0; 10133 } 10134 10135 static struct ibm_struct proxsensor_driver_data = { 10136 .name = "proximity-sensor", 10137 }; 10138 10139 /************************************************************************* 10140 * DYTC Platform Profile interface 10141 */ 10142 10143 #define DYTC_CMD_SET 1 /* To enable/disable IC function mode */ 10144 #define DYTC_CMD_MMC_GET 8 /* To get current MMC function and mode */ 10145 #define DYTC_CMD_RESET 0x1ff /* To reset back to default */ 10146 10147 #define DYTC_CMD_FUNC_CAP 3 /* To get DYTC capabilities */ 10148 #define DYTC_FC_MMC 27 /* MMC Mode supported */ 10149 #define DYTC_FC_PSC 29 /* PSC Mode supported */ 10150 #define DYTC_FC_AMT 31 /* AMT mode supported */ 10151 10152 #define DYTC_GET_FUNCTION_BIT 8 /* Bits 8-11 - function setting */ 10153 #define DYTC_GET_MODE_BIT 12 /* Bits 12-15 - mode setting */ 10154 10155 #define DYTC_SET_FUNCTION_BIT 12 /* Bits 12-15 - function setting */ 10156 #define DYTC_SET_MODE_BIT 16 /* Bits 16-19 - mode setting */ 10157 #define DYTC_SET_VALID_BIT 20 /* Bit 20 - 1 = on, 0 = off */ 10158 10159 #define DYTC_FUNCTION_STD 0 /* Function = 0, standard mode */ 10160 #define DYTC_FUNCTION_CQL 1 /* Function = 1, lap mode */ 10161 #define DYTC_FUNCTION_MMC 11 /* Function = 11, MMC mode */ 10162 #define DYTC_FUNCTION_PSC 13 /* Function = 13, PSC mode */ 10163 #define DYTC_FUNCTION_AMT 15 /* Function = 15, AMT mode */ 10164 10165 #define DYTC_MODE_AMT_ENABLE 0x1 /* Enable AMT (in balanced mode) */ 10166 #define DYTC_MODE_AMT_DISABLE 0xF /* Disable AMT (in other modes) */ 10167 10168 #define DYTC_MODE_MMC_PERFORM 2 /* High power mode aka performance */ 10169 #define DYTC_MODE_MMC_LOWPOWER 3 /* Low power mode */ 10170 #define DYTC_MODE_MMC_BALANCE 0xF /* Default mode aka balanced */ 10171 #define DYTC_MODE_MMC_DEFAULT 0 /* Default mode from MMC_GET, aka balanced */ 10172 10173 #define DYTC_MODE_PSC_LOWPOWER 3 /* Low power mode */ 10174 #define DYTC_MODE_PSC_BALANCE 5 /* Default mode aka balanced */ 10175 #define DYTC_MODE_PSC_PERFORM 7 /* High power mode aka performance */ 10176 10177 #define DYTC_ERR_MASK 0xF /* Bits 0-3 in cmd result are the error result */ 10178 #define DYTC_ERR_SUCCESS 1 /* CMD completed successful */ 10179 10180 #define DYTC_SET_COMMAND(function, mode, on) \ 10181 (DYTC_CMD_SET | (function) << DYTC_SET_FUNCTION_BIT | \ 10182 (mode) << DYTC_SET_MODE_BIT | \ 10183 (on) << DYTC_SET_VALID_BIT) 10184 10185 #define DYTC_DISABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 0) 10186 #define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 1) 10187 static int dytc_control_amt(bool enable); 10188 static bool dytc_amt_active; 10189 10190 static enum platform_profile_option dytc_current_profile; 10191 static atomic_t dytc_ignore_event = ATOMIC_INIT(0); 10192 static DEFINE_MUTEX(dytc_mutex); 10193 static int dytc_capabilities; 10194 static bool dytc_mmc_get_available; 10195 static int profile_force; 10196 10197 static int convert_dytc_to_profile(int funcmode, int dytcmode, 10198 enum platform_profile_option *profile) 10199 { 10200 switch (funcmode) { 10201 case DYTC_FUNCTION_MMC: 10202 switch (dytcmode) { 10203 case DYTC_MODE_MMC_LOWPOWER: 10204 *profile = PLATFORM_PROFILE_LOW_POWER; 10205 break; 10206 case DYTC_MODE_MMC_DEFAULT: 10207 case DYTC_MODE_MMC_BALANCE: 10208 *profile = PLATFORM_PROFILE_BALANCED; 10209 break; 10210 case DYTC_MODE_MMC_PERFORM: 10211 *profile = PLATFORM_PROFILE_PERFORMANCE; 10212 break; 10213 default: /* Unknown mode */ 10214 return -EINVAL; 10215 } 10216 return 0; 10217 case DYTC_FUNCTION_PSC: 10218 switch (dytcmode) { 10219 case DYTC_MODE_PSC_LOWPOWER: 10220 *profile = PLATFORM_PROFILE_LOW_POWER; 10221 break; 10222 case DYTC_MODE_PSC_BALANCE: 10223 *profile = PLATFORM_PROFILE_BALANCED; 10224 break; 10225 case DYTC_MODE_PSC_PERFORM: 10226 *profile = PLATFORM_PROFILE_PERFORMANCE; 10227 break; 10228 default: /* Unknown mode */ 10229 return -EINVAL; 10230 } 10231 return 0; 10232 case DYTC_FUNCTION_AMT: 10233 /* For now return balanced. It's the closest we have to 'auto' */ 10234 *profile = PLATFORM_PROFILE_BALANCED; 10235 return 0; 10236 default: 10237 /* Unknown function */ 10238 return -EOPNOTSUPP; 10239 } 10240 return 0; 10241 } 10242 10243 static int convert_profile_to_dytc(enum platform_profile_option profile, int *perfmode) 10244 { 10245 switch (profile) { 10246 case PLATFORM_PROFILE_LOW_POWER: 10247 if (dytc_capabilities & BIT(DYTC_FC_MMC)) 10248 *perfmode = DYTC_MODE_MMC_LOWPOWER; 10249 else if (dytc_capabilities & BIT(DYTC_FC_PSC)) 10250 *perfmode = DYTC_MODE_PSC_LOWPOWER; 10251 break; 10252 case PLATFORM_PROFILE_BALANCED: 10253 if (dytc_capabilities & BIT(DYTC_FC_MMC)) 10254 *perfmode = DYTC_MODE_MMC_BALANCE; 10255 else if (dytc_capabilities & BIT(DYTC_FC_PSC)) 10256 *perfmode = DYTC_MODE_PSC_BALANCE; 10257 break; 10258 case PLATFORM_PROFILE_PERFORMANCE: 10259 if (dytc_capabilities & BIT(DYTC_FC_MMC)) 10260 *perfmode = DYTC_MODE_MMC_PERFORM; 10261 else if (dytc_capabilities & BIT(DYTC_FC_PSC)) 10262 *perfmode = DYTC_MODE_PSC_PERFORM; 10263 break; 10264 default: /* Unknown profile */ 10265 return -EOPNOTSUPP; 10266 } 10267 return 0; 10268 } 10269 10270 /* 10271 * dytc_profile_get: Function to register with platform_profile 10272 * handler. Returns current platform profile. 10273 */ 10274 static int dytc_profile_get(struct platform_profile_handler *pprof, 10275 enum platform_profile_option *profile) 10276 { 10277 *profile = dytc_current_profile; 10278 return 0; 10279 } 10280 10281 static int dytc_control_amt(bool enable) 10282 { 10283 int dummy; 10284 int err; 10285 int cmd; 10286 10287 if (!(dytc_capabilities & BIT(DYTC_FC_AMT))) { 10288 pr_warn("Attempting to toggle AMT on a system that doesn't advertise support\n"); 10289 return -ENODEV; 10290 } 10291 10292 if (enable) 10293 cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_ENABLE, enable); 10294 else 10295 cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_DISABLE, enable); 10296 10297 pr_debug("%sabling AMT (cmd 0x%x)", enable ? "en":"dis", cmd); 10298 err = dytc_command(cmd, &dummy); 10299 if (err) 10300 return err; 10301 dytc_amt_active = enable; 10302 return 0; 10303 } 10304 10305 /* 10306 * Helper function - check if we are in CQL mode and if we are 10307 * - disable CQL, 10308 * - run the command 10309 * - enable CQL 10310 * If not in CQL mode, just run the command 10311 */ 10312 static int dytc_cql_command(int command, int *output) 10313 { 10314 int err, cmd_err, dummy; 10315 int cur_funcmode; 10316 10317 /* Determine if we are in CQL mode. This alters the commands we do */ 10318 err = dytc_command(DYTC_CMD_GET, output); 10319 if (err) 10320 return err; 10321 10322 cur_funcmode = (*output >> DYTC_GET_FUNCTION_BIT) & 0xF; 10323 /* Check if we're OK to return immediately */ 10324 if ((command == DYTC_CMD_GET) && (cur_funcmode != DYTC_FUNCTION_CQL)) 10325 return 0; 10326 10327 if (cur_funcmode == DYTC_FUNCTION_CQL) { 10328 atomic_inc(&dytc_ignore_event); 10329 err = dytc_command(DYTC_DISABLE_CQL, &dummy); 10330 if (err) 10331 return err; 10332 } 10333 10334 cmd_err = dytc_command(command, output); 10335 /* Check return condition after we've restored CQL state */ 10336 10337 if (cur_funcmode == DYTC_FUNCTION_CQL) { 10338 err = dytc_command(DYTC_ENABLE_CQL, &dummy); 10339 if (err) 10340 return err; 10341 } 10342 return cmd_err; 10343 } 10344 10345 /* 10346 * dytc_profile_set: Function to register with platform_profile 10347 * handler. Sets current platform profile. 10348 */ 10349 static int dytc_profile_set(struct platform_profile_handler *pprof, 10350 enum platform_profile_option profile) 10351 { 10352 int perfmode; 10353 int output; 10354 int err; 10355 10356 err = mutex_lock_interruptible(&dytc_mutex); 10357 if (err) 10358 return err; 10359 10360 err = convert_profile_to_dytc(profile, &perfmode); 10361 if (err) 10362 goto unlock; 10363 10364 if (dytc_capabilities & BIT(DYTC_FC_MMC)) { 10365 if (profile == PLATFORM_PROFILE_BALANCED) { 10366 /* 10367 * To get back to balanced mode we need to issue a reset command. 10368 * Note we still need to disable CQL mode before hand and re-enable 10369 * it afterwards, otherwise dytc_lapmode gets reset to 0 and stays 10370 * stuck at 0 for aprox. 30 minutes. 10371 */ 10372 err = dytc_cql_command(DYTC_CMD_RESET, &output); 10373 if (err) 10374 goto unlock; 10375 } else { 10376 /* Determine if we are in CQL mode. This alters the commands we do */ 10377 err = dytc_cql_command(DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1), 10378 &output); 10379 if (err) 10380 goto unlock; 10381 } 10382 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { 10383 err = dytc_command(DYTC_SET_COMMAND(DYTC_FUNCTION_PSC, perfmode, 1), &output); 10384 if (err) 10385 goto unlock; 10386 10387 /* system supports AMT, activate it when on balanced */ 10388 if (dytc_capabilities & BIT(DYTC_FC_AMT)) 10389 dytc_control_amt(profile == PLATFORM_PROFILE_BALANCED); 10390 } 10391 /* Success - update current profile */ 10392 dytc_current_profile = profile; 10393 unlock: 10394 mutex_unlock(&dytc_mutex); 10395 return err; 10396 } 10397 10398 static void dytc_profile_refresh(void) 10399 { 10400 enum platform_profile_option profile; 10401 int output = 0, err = 0; 10402 int perfmode, funcmode = 0; 10403 10404 mutex_lock(&dytc_mutex); 10405 if (dytc_capabilities & BIT(DYTC_FC_MMC)) { 10406 if (dytc_mmc_get_available) 10407 err = dytc_command(DYTC_CMD_MMC_GET, &output); 10408 else 10409 err = dytc_cql_command(DYTC_CMD_GET, &output); 10410 funcmode = DYTC_FUNCTION_MMC; 10411 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { 10412 err = dytc_command(DYTC_CMD_GET, &output); 10413 /* Check if we are PSC mode, or have AMT enabled */ 10414 funcmode = (output >> DYTC_GET_FUNCTION_BIT) & 0xF; 10415 } else { /* Unknown profile mode */ 10416 err = -ENODEV; 10417 } 10418 mutex_unlock(&dytc_mutex); 10419 if (err) 10420 return; 10421 10422 perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF; 10423 convert_dytc_to_profile(funcmode, perfmode, &profile); 10424 if (profile != dytc_current_profile) { 10425 dytc_current_profile = profile; 10426 platform_profile_notify(); 10427 } 10428 } 10429 10430 static struct platform_profile_handler dytc_profile = { 10431 .profile_get = dytc_profile_get, 10432 .profile_set = dytc_profile_set, 10433 }; 10434 10435 static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm) 10436 { 10437 int err, output; 10438 10439 /* Setup supported modes */ 10440 set_bit(PLATFORM_PROFILE_LOW_POWER, dytc_profile.choices); 10441 set_bit(PLATFORM_PROFILE_BALANCED, dytc_profile.choices); 10442 set_bit(PLATFORM_PROFILE_PERFORMANCE, dytc_profile.choices); 10443 10444 err = dytc_command(DYTC_CMD_QUERY, &output); 10445 if (err) 10446 return err; 10447 10448 if (output & BIT(DYTC_QUERY_ENABLE_BIT)) 10449 dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF; 10450 10451 /* Check DYTC is enabled and supports mode setting */ 10452 if (dytc_version < 5) 10453 return -ENODEV; 10454 10455 /* Check what capabilities are supported */ 10456 err = dytc_command(DYTC_CMD_FUNC_CAP, &dytc_capabilities); 10457 if (err) 10458 return err; 10459 10460 /* Check if user wants to override the profile selection */ 10461 if (profile_force) { 10462 switch (profile_force) { 10463 case -1: 10464 dytc_capabilities = 0; 10465 break; 10466 case 1: 10467 dytc_capabilities = BIT(DYTC_FC_MMC); 10468 break; 10469 case 2: 10470 dytc_capabilities = BIT(DYTC_FC_PSC); 10471 break; 10472 } 10473 pr_debug("Profile selection forced: 0x%x\n", dytc_capabilities); 10474 } 10475 if (dytc_capabilities & BIT(DYTC_FC_MMC)) { /* MMC MODE */ 10476 pr_debug("MMC is supported\n"); 10477 /* 10478 * Check if MMC_GET functionality available 10479 * Version > 6 and return success from MMC_GET command 10480 */ 10481 dytc_mmc_get_available = false; 10482 if (dytc_version >= 6) { 10483 err = dytc_command(DYTC_CMD_MMC_GET, &output); 10484 if (!err && ((output & DYTC_ERR_MASK) == DYTC_ERR_SUCCESS)) 10485 dytc_mmc_get_available = true; 10486 } 10487 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { /* PSC MODE */ 10488 pr_debug("PSC is supported\n"); 10489 } else { 10490 dbg_printk(TPACPI_DBG_INIT, "No DYTC support available\n"); 10491 return -ENODEV; 10492 } 10493 10494 dbg_printk(TPACPI_DBG_INIT, 10495 "DYTC version %d: thermal mode available\n", dytc_version); 10496 10497 /* Create platform_profile structure and register */ 10498 err = platform_profile_register(&dytc_profile); 10499 /* 10500 * If for some reason platform_profiles aren't enabled 10501 * don't quit terminally. 10502 */ 10503 if (err) 10504 return -ENODEV; 10505 10506 /* Ensure initial values are correct */ 10507 dytc_profile_refresh(); 10508 10509 /* Workaround for https://bugzilla.kernel.org/show_bug.cgi?id=216347 */ 10510 if (dytc_capabilities & BIT(DYTC_FC_PSC)) 10511 dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED); 10512 10513 return 0; 10514 } 10515 10516 static void dytc_profile_exit(void) 10517 { 10518 platform_profile_remove(); 10519 } 10520 10521 static struct ibm_struct dytc_profile_driver_data = { 10522 .name = "dytc-profile", 10523 .exit = dytc_profile_exit, 10524 }; 10525 10526 /************************************************************************* 10527 * Keyboard language interface 10528 */ 10529 10530 struct keyboard_lang_data { 10531 const char *lang_str; 10532 int lang_code; 10533 }; 10534 10535 static const struct keyboard_lang_data keyboard_lang_data[] = { 10536 {"be", 0x080c}, 10537 {"cz", 0x0405}, 10538 {"da", 0x0406}, 10539 {"de", 0x0c07}, 10540 {"en", 0x0000}, 10541 {"es", 0x2c0a}, 10542 {"et", 0x0425}, 10543 {"fr", 0x040c}, 10544 {"fr-ch", 0x100c}, 10545 {"hu", 0x040e}, 10546 {"it", 0x0410}, 10547 {"jp", 0x0411}, 10548 {"nl", 0x0413}, 10549 {"nn", 0x0414}, 10550 {"pl", 0x0415}, 10551 {"pt", 0x0816}, 10552 {"sl", 0x041b}, 10553 {"sv", 0x081d}, 10554 {"tr", 0x041f}, 10555 }; 10556 10557 static int set_keyboard_lang_command(int command) 10558 { 10559 acpi_handle sskl_handle; 10560 int output; 10561 10562 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSKL", &sskl_handle))) { 10563 /* Platform doesn't support SSKL */ 10564 return -ENODEV; 10565 } 10566 10567 if (!acpi_evalf(sskl_handle, &output, NULL, "dd", command)) 10568 return -EIO; 10569 10570 return 0; 10571 } 10572 10573 static int get_keyboard_lang(int *output) 10574 { 10575 acpi_handle gskl_handle; 10576 int kbd_lang; 10577 10578 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSKL", &gskl_handle))) { 10579 /* Platform doesn't support GSKL */ 10580 return -ENODEV; 10581 } 10582 10583 if (!acpi_evalf(gskl_handle, &kbd_lang, NULL, "dd", 0x02000000)) 10584 return -EIO; 10585 10586 /* 10587 * METHOD_ERR gets returned on devices where there are no special (e.g. '=', 10588 * '(' and ')') keys which use layout dependent key-press emulation. 10589 */ 10590 if (kbd_lang & METHOD_ERR) 10591 return -ENODEV; 10592 10593 *output = kbd_lang; 10594 10595 return 0; 10596 } 10597 10598 /* sysfs keyboard language entry */ 10599 static ssize_t keyboard_lang_show(struct device *dev, 10600 struct device_attribute *attr, 10601 char *buf) 10602 { 10603 int output, err, i, len = 0; 10604 10605 err = get_keyboard_lang(&output); 10606 if (err) 10607 return err; 10608 10609 for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) { 10610 if (i) 10611 len += sysfs_emit_at(buf, len, "%s", " "); 10612 10613 if (output == keyboard_lang_data[i].lang_code) { 10614 len += sysfs_emit_at(buf, len, "[%s]", keyboard_lang_data[i].lang_str); 10615 } else { 10616 len += sysfs_emit_at(buf, len, "%s", keyboard_lang_data[i].lang_str); 10617 } 10618 } 10619 len += sysfs_emit_at(buf, len, "\n"); 10620 10621 return len; 10622 } 10623 10624 static ssize_t keyboard_lang_store(struct device *dev, 10625 struct device_attribute *attr, 10626 const char *buf, size_t count) 10627 { 10628 int err, i; 10629 bool lang_found = false; 10630 int lang_code = 0; 10631 10632 for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) { 10633 if (sysfs_streq(buf, keyboard_lang_data[i].lang_str)) { 10634 lang_code = keyboard_lang_data[i].lang_code; 10635 lang_found = true; 10636 break; 10637 } 10638 } 10639 10640 if (lang_found) { 10641 lang_code = lang_code | 1 << 24; 10642 10643 /* Set language code */ 10644 err = set_keyboard_lang_command(lang_code); 10645 if (err) 10646 return err; 10647 } else { 10648 dev_err(&tpacpi_pdev->dev, "Unknown Keyboard language. Ignoring\n"); 10649 return -EINVAL; 10650 } 10651 10652 tpacpi_disclose_usertask(attr->attr.name, 10653 "keyboard language is set to %s\n", buf); 10654 10655 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "keyboard_lang"); 10656 10657 return count; 10658 } 10659 static DEVICE_ATTR_RW(keyboard_lang); 10660 10661 static struct attribute *kbdlang_attributes[] = { 10662 &dev_attr_keyboard_lang.attr, 10663 NULL 10664 }; 10665 10666 static umode_t kbdlang_attr_is_visible(struct kobject *kobj, 10667 struct attribute *attr, int n) 10668 { 10669 return tp_features.kbd_lang ? attr->mode : 0; 10670 } 10671 10672 static const struct attribute_group kbdlang_attr_group = { 10673 .is_visible = kbdlang_attr_is_visible, 10674 .attrs = kbdlang_attributes, 10675 }; 10676 10677 static int tpacpi_kbdlang_init(struct ibm_init_struct *iibm) 10678 { 10679 int err, output; 10680 10681 err = get_keyboard_lang(&output); 10682 tp_features.kbd_lang = !err; 10683 return err; 10684 } 10685 10686 static struct ibm_struct kbdlang_driver_data = { 10687 .name = "kbdlang", 10688 }; 10689 10690 /************************************************************************* 10691 * DPRC(Dynamic Power Reduction Control) subdriver, for the Lenovo WWAN 10692 * and WLAN feature. 10693 */ 10694 #define DPRC_GET_WWAN_ANTENNA_TYPE 0x40000 10695 #define DPRC_WWAN_ANTENNA_TYPE_A_BIT BIT(4) 10696 #define DPRC_WWAN_ANTENNA_TYPE_B_BIT BIT(8) 10697 static bool has_antennatype; 10698 static int wwan_antennatype; 10699 10700 static int dprc_command(int command, int *output) 10701 { 10702 acpi_handle dprc_handle; 10703 10704 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DPRC", &dprc_handle))) { 10705 /* Platform doesn't support DPRC */ 10706 return -ENODEV; 10707 } 10708 10709 if (!acpi_evalf(dprc_handle, output, NULL, "dd", command)) 10710 return -EIO; 10711 10712 /* 10713 * METHOD_ERR gets returned on devices where few commands are not supported 10714 * for example command to get WWAN Antenna type command is not supported on 10715 * some devices. 10716 */ 10717 if (*output & METHOD_ERR) 10718 return -ENODEV; 10719 10720 return 0; 10721 } 10722 10723 static int get_wwan_antenna(int *wwan_antennatype) 10724 { 10725 int output, err; 10726 10727 /* Get current Antenna type */ 10728 err = dprc_command(DPRC_GET_WWAN_ANTENNA_TYPE, &output); 10729 if (err) 10730 return err; 10731 10732 if (output & DPRC_WWAN_ANTENNA_TYPE_A_BIT) 10733 *wwan_antennatype = 1; 10734 else if (output & DPRC_WWAN_ANTENNA_TYPE_B_BIT) 10735 *wwan_antennatype = 2; 10736 else 10737 return -ENODEV; 10738 10739 return 0; 10740 } 10741 10742 /* sysfs wwan antenna type entry */ 10743 static ssize_t wwan_antenna_type_show(struct device *dev, 10744 struct device_attribute *attr, 10745 char *buf) 10746 { 10747 switch (wwan_antennatype) { 10748 case 1: 10749 return sysfs_emit(buf, "type a\n"); 10750 case 2: 10751 return sysfs_emit(buf, "type b\n"); 10752 default: 10753 return -ENODATA; 10754 } 10755 } 10756 static DEVICE_ATTR_RO(wwan_antenna_type); 10757 10758 static struct attribute *dprc_attributes[] = { 10759 &dev_attr_wwan_antenna_type.attr, 10760 NULL 10761 }; 10762 10763 static umode_t dprc_attr_is_visible(struct kobject *kobj, 10764 struct attribute *attr, int n) 10765 { 10766 return has_antennatype ? attr->mode : 0; 10767 } 10768 10769 static const struct attribute_group dprc_attr_group = { 10770 .is_visible = dprc_attr_is_visible, 10771 .attrs = dprc_attributes, 10772 }; 10773 10774 static int tpacpi_dprc_init(struct ibm_init_struct *iibm) 10775 { 10776 int err; 10777 10778 err = get_wwan_antenna(&wwan_antennatype); 10779 if (err) 10780 return err; 10781 10782 has_antennatype = true; 10783 return 0; 10784 } 10785 10786 static struct ibm_struct dprc_driver_data = { 10787 .name = "dprc", 10788 }; 10789 10790 /* --------------------------------------------------------------------- */ 10791 10792 static struct attribute *tpacpi_driver_attributes[] = { 10793 &driver_attr_debug_level.attr, 10794 &driver_attr_version.attr, 10795 &driver_attr_interface_version.attr, 10796 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10797 &driver_attr_wlsw_emulstate.attr, 10798 &driver_attr_bluetooth_emulstate.attr, 10799 &driver_attr_wwan_emulstate.attr, 10800 &driver_attr_uwb_emulstate.attr, 10801 #endif 10802 NULL 10803 }; 10804 10805 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10806 static umode_t tpacpi_attr_is_visible(struct kobject *kobj, 10807 struct attribute *attr, int n) 10808 { 10809 if (attr == &driver_attr_wlsw_emulstate.attr) { 10810 if (!dbg_wlswemul) 10811 return 0; 10812 } else if (attr == &driver_attr_bluetooth_emulstate.attr) { 10813 if (!dbg_bluetoothemul) 10814 return 0; 10815 } else if (attr == &driver_attr_wwan_emulstate.attr) { 10816 if (!dbg_wwanemul) 10817 return 0; 10818 } else if (attr == &driver_attr_uwb_emulstate.attr) { 10819 if (!dbg_uwbemul) 10820 return 0; 10821 } 10822 10823 return attr->mode; 10824 } 10825 #endif 10826 10827 static const struct attribute_group tpacpi_driver_attr_group = { 10828 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10829 .is_visible = tpacpi_attr_is_visible, 10830 #endif 10831 .attrs = tpacpi_driver_attributes, 10832 }; 10833 10834 static const struct attribute_group *tpacpi_driver_groups[] = { 10835 &tpacpi_driver_attr_group, 10836 NULL, 10837 }; 10838 10839 static const struct attribute_group *tpacpi_groups[] = { 10840 &adaptive_kbd_attr_group, 10841 &hotkey_attr_group, 10842 &bluetooth_attr_group, 10843 &wan_attr_group, 10844 &cmos_attr_group, 10845 &proxsensor_attr_group, 10846 &kbdlang_attr_group, 10847 &dprc_attr_group, 10848 NULL, 10849 }; 10850 10851 static const struct attribute_group *tpacpi_hwmon_groups[] = { 10852 &thermal_attr_group, 10853 &temp_label_attr_group, 10854 &fan_attr_group, 10855 NULL, 10856 }; 10857 10858 static const struct attribute_group *tpacpi_hwmon_driver_groups[] = { 10859 &fan_driver_attr_group, 10860 NULL, 10861 }; 10862 10863 /**************************************************************************** 10864 **************************************************************************** 10865 * 10866 * Platform drivers 10867 * 10868 **************************************************************************** 10869 ****************************************************************************/ 10870 10871 static struct platform_driver tpacpi_pdriver = { 10872 .driver = { 10873 .name = TPACPI_DRVR_NAME, 10874 .pm = &tpacpi_pm, 10875 .groups = tpacpi_driver_groups, 10876 .dev_groups = tpacpi_groups, 10877 }, 10878 .shutdown = tpacpi_shutdown_handler, 10879 }; 10880 10881 static struct platform_driver tpacpi_hwmon_pdriver = { 10882 .driver = { 10883 .name = TPACPI_HWMON_DRVR_NAME, 10884 .groups = tpacpi_hwmon_driver_groups, 10885 }, 10886 }; 10887 10888 /**************************************************************************** 10889 **************************************************************************** 10890 * 10891 * Infrastructure 10892 * 10893 **************************************************************************** 10894 ****************************************************************************/ 10895 10896 /* 10897 * HKEY event callout for other subdrivers go here 10898 * (yes, it is ugly, but it is quick, safe, and gets the job done 10899 */ 10900 static void tpacpi_driver_event(const unsigned int hkey_event) 10901 { 10902 if (ibm_backlight_device) { 10903 switch (hkey_event) { 10904 case TP_HKEY_EV_BRGHT_UP: 10905 case TP_HKEY_EV_BRGHT_DOWN: 10906 tpacpi_brightness_notify_change(); 10907 } 10908 } 10909 if (alsa_card) { 10910 switch (hkey_event) { 10911 case TP_HKEY_EV_VOL_UP: 10912 case TP_HKEY_EV_VOL_DOWN: 10913 case TP_HKEY_EV_VOL_MUTE: 10914 volume_alsa_notify_change(); 10915 } 10916 } 10917 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) { 10918 enum led_brightness brightness; 10919 10920 mutex_lock(&kbdlight_mutex); 10921 10922 /* 10923 * Check the brightness actually changed, setting the brightness 10924 * through kbdlight_set_level() also triggers this event. 10925 */ 10926 brightness = kbdlight_sysfs_get(NULL); 10927 if (kbdlight_brightness != brightness) { 10928 kbdlight_brightness = brightness; 10929 led_classdev_notify_brightness_hw_changed( 10930 &tpacpi_led_kbdlight.led_classdev, brightness); 10931 } 10932 10933 mutex_unlock(&kbdlight_mutex); 10934 } 10935 10936 if (hkey_event == TP_HKEY_EV_THM_CSM_COMPLETED) { 10937 lapsensor_refresh(); 10938 /* If we are already accessing DYTC then skip dytc update */ 10939 if (!atomic_add_unless(&dytc_ignore_event, -1, 0)) 10940 dytc_profile_refresh(); 10941 } 10942 10943 if (lcdshadow_dev && hkey_event == TP_HKEY_EV_PRIVACYGUARD_TOGGLE) { 10944 enum drm_privacy_screen_status old_hw_state; 10945 bool changed; 10946 10947 mutex_lock(&lcdshadow_dev->lock); 10948 old_hw_state = lcdshadow_dev->hw_state; 10949 lcdshadow_get_hw_state(lcdshadow_dev); 10950 changed = lcdshadow_dev->hw_state != old_hw_state; 10951 mutex_unlock(&lcdshadow_dev->lock); 10952 10953 if (changed) 10954 drm_privacy_screen_call_notifier_chain(lcdshadow_dev); 10955 } 10956 if (hkey_event == TP_HKEY_EV_AMT_TOGGLE) { 10957 /* If we're enabling AMT we need to force balanced mode */ 10958 if (!dytc_amt_active) 10959 /* This will also set AMT mode enabled */ 10960 dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED); 10961 else 10962 dytc_control_amt(!dytc_amt_active); 10963 } 10964 10965 } 10966 10967 static void hotkey_driver_event(const unsigned int scancode) 10968 { 10969 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 10970 } 10971 10972 /* --------------------------------------------------------------------- */ 10973 10974 /* /proc support */ 10975 static struct proc_dir_entry *proc_dir; 10976 10977 /* 10978 * Module and infrastructure proble, init and exit handling 10979 */ 10980 10981 static bool force_load; 10982 10983 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 10984 static const char * __init str_supported(int is_supported) 10985 { 10986 static char text_unsupported[] __initdata = "not supported"; 10987 10988 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 10989 } 10990 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 10991 10992 static void ibm_exit(struct ibm_struct *ibm) 10993 { 10994 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 10995 10996 list_del_init(&ibm->all_drivers); 10997 10998 if (ibm->flags.acpi_notify_installed) { 10999 dbg_printk(TPACPI_DBG_EXIT, 11000 "%s: acpi_remove_notify_handler\n", ibm->name); 11001 BUG_ON(!ibm->acpi); 11002 acpi_remove_notify_handler(*ibm->acpi->handle, 11003 ibm->acpi->type, 11004 dispatch_acpi_notify); 11005 ibm->flags.acpi_notify_installed = 0; 11006 } 11007 11008 if (ibm->flags.proc_created) { 11009 dbg_printk(TPACPI_DBG_EXIT, 11010 "%s: remove_proc_entry\n", ibm->name); 11011 remove_proc_entry(ibm->name, proc_dir); 11012 ibm->flags.proc_created = 0; 11013 } 11014 11015 if (ibm->flags.acpi_driver_registered) { 11016 dbg_printk(TPACPI_DBG_EXIT, 11017 "%s: acpi_bus_unregister_driver\n", ibm->name); 11018 BUG_ON(!ibm->acpi); 11019 acpi_bus_unregister_driver(ibm->acpi->driver); 11020 kfree(ibm->acpi->driver); 11021 ibm->acpi->driver = NULL; 11022 ibm->flags.acpi_driver_registered = 0; 11023 } 11024 11025 if (ibm->flags.init_called && ibm->exit) { 11026 ibm->exit(); 11027 ibm->flags.init_called = 0; 11028 } 11029 11030 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 11031 } 11032 11033 static int __init ibm_init(struct ibm_init_struct *iibm) 11034 { 11035 int ret; 11036 struct ibm_struct *ibm = iibm->data; 11037 struct proc_dir_entry *entry; 11038 11039 BUG_ON(ibm == NULL); 11040 11041 INIT_LIST_HEAD(&ibm->all_drivers); 11042 11043 if (ibm->flags.experimental && !experimental) 11044 return 0; 11045 11046 dbg_printk(TPACPI_DBG_INIT, 11047 "probing for %s\n", ibm->name); 11048 11049 if (iibm->init) { 11050 ret = iibm->init(iibm); 11051 if (ret > 0 || ret == -ENODEV) 11052 return 0; /* subdriver functionality not available */ 11053 if (ret) 11054 return ret; 11055 11056 ibm->flags.init_called = 1; 11057 } 11058 11059 if (ibm->acpi) { 11060 if (ibm->acpi->hid) { 11061 ret = register_tpacpi_subdriver(ibm); 11062 if (ret) 11063 goto err_out; 11064 } 11065 11066 if (ibm->acpi->notify) { 11067 ret = setup_acpi_notify(ibm); 11068 if (ret == -ENODEV) { 11069 pr_notice("disabling subdriver %s\n", 11070 ibm->name); 11071 ret = 0; 11072 goto err_out; 11073 } 11074 if (ret < 0) 11075 goto err_out; 11076 } 11077 } 11078 11079 dbg_printk(TPACPI_DBG_INIT, 11080 "%s installed\n", ibm->name); 11081 11082 if (ibm->read) { 11083 umode_t mode = iibm->base_procfs_mode; 11084 11085 if (!mode) 11086 mode = S_IRUGO; 11087 if (ibm->write) 11088 mode |= S_IWUSR; 11089 entry = proc_create_data(ibm->name, mode, proc_dir, 11090 &dispatch_proc_ops, ibm); 11091 if (!entry) { 11092 pr_err("unable to create proc entry %s\n", ibm->name); 11093 ret = -ENODEV; 11094 goto err_out; 11095 } 11096 ibm->flags.proc_created = 1; 11097 } 11098 11099 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 11100 11101 return 0; 11102 11103 err_out: 11104 dbg_printk(TPACPI_DBG_INIT, 11105 "%s: at error exit path with result %d\n", 11106 ibm->name, ret); 11107 11108 ibm_exit(ibm); 11109 return (ret < 0) ? ret : 0; 11110 } 11111 11112 /* Probing */ 11113 11114 static char __init tpacpi_parse_fw_id(const char * const s, 11115 u32 *model, u16 *release) 11116 { 11117 int i; 11118 11119 if (!s || strlen(s) < 8) 11120 goto invalid; 11121 11122 for (i = 0; i < 8; i++) 11123 if (!((s[i] >= '0' && s[i] <= '9') || 11124 (s[i] >= 'A' && s[i] <= 'Z'))) 11125 goto invalid; 11126 11127 /* 11128 * Most models: xxyTkkWW (#.##c) 11129 * Ancient 570/600 and -SL lacks (#.##c) 11130 */ 11131 if (s[3] == 'T' || s[3] == 'N') { 11132 *model = TPID(s[0], s[1]); 11133 *release = TPVER(s[4], s[5]); 11134 return s[2]; 11135 11136 /* New models: xxxyTkkW (#.##c); T550 and some others */ 11137 } else if (s[4] == 'T' || s[4] == 'N') { 11138 *model = TPID3(s[0], s[1], s[2]); 11139 *release = TPVER(s[5], s[6]); 11140 return s[3]; 11141 } 11142 11143 invalid: 11144 return '\0'; 11145 } 11146 11147 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private) 11148 { 11149 char *ec_fw_string = (char *) private; 11150 const char *dmi_data = (const char *)dm; 11151 /* 11152 * ThinkPad Embedded Controller Program Table on newer models 11153 * 11154 * Offset | Name | Width | Description 11155 * ---------------------------------------------------- 11156 * 0x00 | Type | BYTE | 0x8C 11157 * 0x01 | Length | BYTE | 11158 * 0x02 | Handle | WORD | Varies 11159 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO" 11160 * 0x0A | OEM struct offset | BYTE | 0x0B 11161 * 0x0B | OEM struct number | BYTE | 0x07, for this structure 11162 * 0x0C | OEM struct revision | BYTE | 0x01, for this format 11163 * 0x0D | ECP version ID | STR ID | 11164 * 0x0E | ECP release date | STR ID | 11165 */ 11166 11167 /* Return if data structure not match */ 11168 if (dm->type != 140 || dm->length < 0x0F || 11169 memcmp(dmi_data + 4, "LENOVO", 6) != 0 || 11170 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 || 11171 dmi_data[0x0C] != 0x01) 11172 return; 11173 11174 /* fwstr is the first 8byte string */ 11175 strncpy(ec_fw_string, dmi_data + 0x0F, 8); 11176 } 11177 11178 /* returns 0 - probe ok, or < 0 - probe error. 11179 * Probe ok doesn't mean thinkpad found. 11180 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 11181 static int __must_check __init get_thinkpad_model_data( 11182 struct thinkpad_id_data *tp) 11183 { 11184 const struct dmi_device *dev = NULL; 11185 char ec_fw_string[18] = {0}; 11186 char const *s; 11187 char t; 11188 11189 if (!tp) 11190 return -EINVAL; 11191 11192 memset(tp, 0, sizeof(*tp)); 11193 11194 if (dmi_name_in_vendors("IBM")) 11195 tp->vendor = PCI_VENDOR_ID_IBM; 11196 else if (dmi_name_in_vendors("LENOVO")) 11197 tp->vendor = PCI_VENDOR_ID_LENOVO; 11198 else 11199 return 0; 11200 11201 s = dmi_get_system_info(DMI_BIOS_VERSION); 11202 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 11203 if (s && !tp->bios_version_str) 11204 return -ENOMEM; 11205 11206 /* Really ancient ThinkPad 240X will fail this, which is fine */ 11207 t = tpacpi_parse_fw_id(tp->bios_version_str, 11208 &tp->bios_model, &tp->bios_release); 11209 if (t != 'E' && t != 'C') 11210 return 0; 11211 11212 /* 11213 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 11214 * X32 or newer, all Z series; Some models must have an 11215 * up-to-date BIOS or they will not be detected. 11216 * 11217 * See https://thinkwiki.org/wiki/List_of_DMI_IDs 11218 */ 11219 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 11220 if (sscanf(dev->name, 11221 "IBM ThinkPad Embedded Controller -[%17c", 11222 ec_fw_string) == 1) { 11223 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 11224 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 11225 break; 11226 } 11227 } 11228 11229 /* Newer ThinkPads have different EC program info table */ 11230 if (!ec_fw_string[0]) 11231 dmi_walk(find_new_ec_fwstr, &ec_fw_string); 11232 11233 if (ec_fw_string[0]) { 11234 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 11235 if (!tp->ec_version_str) 11236 return -ENOMEM; 11237 11238 t = tpacpi_parse_fw_id(ec_fw_string, 11239 &tp->ec_model, &tp->ec_release); 11240 if (t != 'H') { 11241 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n", 11242 ec_fw_string); 11243 pr_notice("please report this to %s\n", TPACPI_MAIL); 11244 } 11245 } 11246 11247 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 11248 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 11249 tp->model_str = kstrdup(s, GFP_KERNEL); 11250 if (!tp->model_str) 11251 return -ENOMEM; 11252 } else { 11253 s = dmi_get_system_info(DMI_BIOS_VENDOR); 11254 if (s && !(strncasecmp(s, "Lenovo", 6))) { 11255 tp->model_str = kstrdup(s, GFP_KERNEL); 11256 if (!tp->model_str) 11257 return -ENOMEM; 11258 } 11259 } 11260 11261 s = dmi_get_system_info(DMI_PRODUCT_NAME); 11262 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 11263 if (s && !tp->nummodel_str) 11264 return -ENOMEM; 11265 11266 return 0; 11267 } 11268 11269 static int __init probe_for_thinkpad(void) 11270 { 11271 int is_thinkpad; 11272 11273 if (acpi_disabled) 11274 return -ENODEV; 11275 11276 /* It would be dangerous to run the driver in this case */ 11277 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 11278 return -ENODEV; 11279 11280 /* 11281 * Non-ancient models have better DMI tagging, but very old models 11282 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 11283 */ 11284 is_thinkpad = (thinkpad_id.model_str != NULL) || 11285 (thinkpad_id.ec_model != 0) || 11286 tpacpi_is_fw_known(); 11287 11288 /* The EC handler is required */ 11289 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 11290 if (!ec_handle) { 11291 if (is_thinkpad) 11292 pr_err("Not yet supported ThinkPad detected!\n"); 11293 return -ENODEV; 11294 } 11295 11296 if (!is_thinkpad && !force_load) 11297 return -ENODEV; 11298 11299 return 0; 11300 } 11301 11302 static void __init thinkpad_acpi_init_banner(void) 11303 { 11304 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 11305 pr_info("%s\n", TPACPI_URL); 11306 11307 pr_info("ThinkPad BIOS %s, EC %s\n", 11308 (thinkpad_id.bios_version_str) ? 11309 thinkpad_id.bios_version_str : "unknown", 11310 (thinkpad_id.ec_version_str) ? 11311 thinkpad_id.ec_version_str : "unknown"); 11312 11313 BUG_ON(!thinkpad_id.vendor); 11314 11315 if (thinkpad_id.model_str) 11316 pr_info("%s %s, model %s\n", 11317 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 11318 "IBM" : ((thinkpad_id.vendor == 11319 PCI_VENDOR_ID_LENOVO) ? 11320 "Lenovo" : "Unknown vendor"), 11321 thinkpad_id.model_str, 11322 (thinkpad_id.nummodel_str) ? 11323 thinkpad_id.nummodel_str : "unknown"); 11324 } 11325 11326 /* Module init, exit, parameters */ 11327 11328 static struct ibm_init_struct ibms_init[] __initdata = { 11329 { 11330 .data = &thinkpad_acpi_driver_data, 11331 }, 11332 { 11333 .init = hotkey_init, 11334 .data = &hotkey_driver_data, 11335 }, 11336 { 11337 .init = bluetooth_init, 11338 .data = &bluetooth_driver_data, 11339 }, 11340 { 11341 .init = wan_init, 11342 .data = &wan_driver_data, 11343 }, 11344 { 11345 .init = uwb_init, 11346 .data = &uwb_driver_data, 11347 }, 11348 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 11349 { 11350 .init = video_init, 11351 .base_procfs_mode = S_IRUSR, 11352 .data = &video_driver_data, 11353 }, 11354 #endif 11355 { 11356 .init = kbdlight_init, 11357 .data = &kbdlight_driver_data, 11358 }, 11359 { 11360 .init = light_init, 11361 .data = &light_driver_data, 11362 }, 11363 { 11364 .init = cmos_init, 11365 .data = &cmos_driver_data, 11366 }, 11367 { 11368 .init = led_init, 11369 .data = &led_driver_data, 11370 }, 11371 { 11372 .init = beep_init, 11373 .data = &beep_driver_data, 11374 }, 11375 { 11376 .init = thermal_init, 11377 .data = &thermal_driver_data, 11378 }, 11379 { 11380 .init = brightness_init, 11381 .data = &brightness_driver_data, 11382 }, 11383 { 11384 .init = volume_init, 11385 .data = &volume_driver_data, 11386 }, 11387 { 11388 .init = fan_init, 11389 .data = &fan_driver_data, 11390 }, 11391 { 11392 .init = mute_led_init, 11393 .data = &mute_led_driver_data, 11394 }, 11395 { 11396 .init = tpacpi_battery_init, 11397 .data = &battery_driver_data, 11398 }, 11399 { 11400 .init = tpacpi_lcdshadow_init, 11401 .data = &lcdshadow_driver_data, 11402 }, 11403 { 11404 .init = tpacpi_proxsensor_init, 11405 .data = &proxsensor_driver_data, 11406 }, 11407 { 11408 .init = tpacpi_dytc_profile_init, 11409 .data = &dytc_profile_driver_data, 11410 }, 11411 { 11412 .init = tpacpi_kbdlang_init, 11413 .data = &kbdlang_driver_data, 11414 }, 11415 { 11416 .init = tpacpi_dprc_init, 11417 .data = &dprc_driver_data, 11418 }, 11419 }; 11420 11421 static int __init set_ibm_param(const char *val, const struct kernel_param *kp) 11422 { 11423 unsigned int i; 11424 struct ibm_struct *ibm; 11425 11426 if (!kp || !kp->name || !val) 11427 return -EINVAL; 11428 11429 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 11430 ibm = ibms_init[i].data; 11431 if (!ibm || !ibm->name) 11432 continue; 11433 11434 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 11435 if (strlen(val) > sizeof(ibms_init[i].param) - 1) 11436 return -ENOSPC; 11437 strcpy(ibms_init[i].param, val); 11438 return 0; 11439 } 11440 } 11441 11442 return -EINVAL; 11443 } 11444 11445 module_param(experimental, int, 0444); 11446 MODULE_PARM_DESC(experimental, 11447 "Enables experimental features when non-zero"); 11448 11449 module_param_named(debug, dbg_level, uint, 0); 11450 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 11451 11452 module_param(force_load, bool, 0444); 11453 MODULE_PARM_DESC(force_load, 11454 "Attempts to load the driver even on a mis-identified ThinkPad when true"); 11455 11456 module_param_named(fan_control, fan_control_allowed, bool, 0444); 11457 MODULE_PARM_DESC(fan_control, 11458 "Enables setting fan parameters features when true"); 11459 11460 module_param_named(brightness_mode, brightness_mode, uint, 0444); 11461 MODULE_PARM_DESC(brightness_mode, 11462 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 11463 11464 module_param(brightness_enable, uint, 0444); 11465 MODULE_PARM_DESC(brightness_enable, 11466 "Enables backlight control when 1, disables when 0"); 11467 11468 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 11469 module_param_named(volume_mode, volume_mode, uint, 0444); 11470 MODULE_PARM_DESC(volume_mode, 11471 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 11472 11473 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 11474 MODULE_PARM_DESC(volume_capabilities, 11475 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only"); 11476 11477 module_param_named(volume_control, volume_control_allowed, bool, 0444); 11478 MODULE_PARM_DESC(volume_control, 11479 "Enables software override for the console audio control when true"); 11480 11481 module_param_named(software_mute, software_mute_requested, bool, 0444); 11482 MODULE_PARM_DESC(software_mute, 11483 "Request full software mute control"); 11484 11485 /* ALSA module API parameters */ 11486 module_param_named(index, alsa_index, int, 0444); 11487 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 11488 module_param_named(id, alsa_id, charp, 0444); 11489 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 11490 module_param_named(enable, alsa_enable, bool, 0444); 11491 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 11492 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 11493 11494 /* The module parameter can't be read back, that's why 0 is used here */ 11495 #define TPACPI_PARAM(feature) \ 11496 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 11497 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation") 11498 11499 TPACPI_PARAM(hotkey); 11500 TPACPI_PARAM(bluetooth); 11501 TPACPI_PARAM(video); 11502 TPACPI_PARAM(light); 11503 TPACPI_PARAM(cmos); 11504 TPACPI_PARAM(led); 11505 TPACPI_PARAM(beep); 11506 TPACPI_PARAM(brightness); 11507 TPACPI_PARAM(volume); 11508 TPACPI_PARAM(fan); 11509 11510 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 11511 module_param(dbg_wlswemul, uint, 0444); 11512 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 11513 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 11514 MODULE_PARM_DESC(wlsw_state, 11515 "Initial state of the emulated WLSW switch"); 11516 11517 module_param(dbg_bluetoothemul, uint, 0444); 11518 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 11519 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 11520 MODULE_PARM_DESC(bluetooth_state, 11521 "Initial state of the emulated bluetooth switch"); 11522 11523 module_param(dbg_wwanemul, uint, 0444); 11524 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 11525 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 11526 MODULE_PARM_DESC(wwan_state, 11527 "Initial state of the emulated WWAN switch"); 11528 11529 module_param(dbg_uwbemul, uint, 0444); 11530 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 11531 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 11532 MODULE_PARM_DESC(uwb_state, 11533 "Initial state of the emulated UWB switch"); 11534 #endif 11535 11536 module_param(profile_force, int, 0444); 11537 MODULE_PARM_DESC(profile_force, "Force profile mode. -1=off, 1=MMC, 2=PSC"); 11538 11539 static void thinkpad_acpi_module_exit(void) 11540 { 11541 struct ibm_struct *ibm, *itmp; 11542 11543 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 11544 11545 if (tpacpi_hwmon) 11546 hwmon_device_unregister(tpacpi_hwmon); 11547 if (tp_features.sensors_pdrv_registered) 11548 platform_driver_unregister(&tpacpi_hwmon_pdriver); 11549 if (tp_features.platform_drv_registered) 11550 platform_driver_unregister(&tpacpi_pdriver); 11551 11552 list_for_each_entry_safe_reverse(ibm, itmp, 11553 &tpacpi_all_drivers, 11554 all_drivers) { 11555 ibm_exit(ibm); 11556 } 11557 11558 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 11559 11560 if (tpacpi_inputdev) { 11561 if (tp_features.input_device_registered) 11562 input_unregister_device(tpacpi_inputdev); 11563 else 11564 input_free_device(tpacpi_inputdev); 11565 kfree(hotkey_keycode_map); 11566 } 11567 11568 if (tpacpi_sensors_pdev) 11569 platform_device_unregister(tpacpi_sensors_pdev); 11570 if (tpacpi_pdev) 11571 platform_device_unregister(tpacpi_pdev); 11572 if (proc_dir) 11573 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 11574 if (tpacpi_wq) 11575 destroy_workqueue(tpacpi_wq); 11576 11577 kfree(thinkpad_id.bios_version_str); 11578 kfree(thinkpad_id.ec_version_str); 11579 kfree(thinkpad_id.model_str); 11580 kfree(thinkpad_id.nummodel_str); 11581 } 11582 11583 11584 static int __init thinkpad_acpi_module_init(void) 11585 { 11586 const struct dmi_system_id *dmi_id; 11587 int ret, i; 11588 acpi_object_type obj_type; 11589 11590 tpacpi_lifecycle = TPACPI_LIFE_INIT; 11591 11592 /* Driver-level probe */ 11593 11594 ret = get_thinkpad_model_data(&thinkpad_id); 11595 if (ret) { 11596 pr_err("unable to get DMI data: %d\n", ret); 11597 thinkpad_acpi_module_exit(); 11598 return ret; 11599 } 11600 ret = probe_for_thinkpad(); 11601 if (ret) { 11602 thinkpad_acpi_module_exit(); 11603 return ret; 11604 } 11605 11606 /* Driver initialization */ 11607 11608 thinkpad_acpi_init_banner(); 11609 tpacpi_check_outdated_fw(); 11610 11611 TPACPI_ACPIHANDLE_INIT(ecrd); 11612 TPACPI_ACPIHANDLE_INIT(ecwr); 11613 11614 /* 11615 * Quirk: in some models (e.g. X380 Yoga), an object named ECRD 11616 * exists, but it is a register, not a method. 11617 */ 11618 if (ecrd_handle) { 11619 acpi_get_type(ecrd_handle, &obj_type); 11620 if (obj_type != ACPI_TYPE_METHOD) 11621 ecrd_handle = NULL; 11622 } 11623 if (ecwr_handle) { 11624 acpi_get_type(ecwr_handle, &obj_type); 11625 if (obj_type != ACPI_TYPE_METHOD) 11626 ecwr_handle = NULL; 11627 } 11628 11629 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 11630 if (!tpacpi_wq) { 11631 thinkpad_acpi_module_exit(); 11632 return -ENOMEM; 11633 } 11634 11635 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 11636 if (!proc_dir) { 11637 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 11638 thinkpad_acpi_module_exit(); 11639 return -ENODEV; 11640 } 11641 11642 dmi_id = dmi_first_match(fwbug_list); 11643 if (dmi_id) 11644 tp_features.quirks = dmi_id->driver_data; 11645 11646 /* Device initialization */ 11647 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, PLATFORM_DEVID_NONE, 11648 NULL, 0); 11649 if (IS_ERR(tpacpi_pdev)) { 11650 ret = PTR_ERR(tpacpi_pdev); 11651 tpacpi_pdev = NULL; 11652 pr_err("unable to register platform device\n"); 11653 thinkpad_acpi_module_exit(); 11654 return ret; 11655 } 11656 tpacpi_sensors_pdev = platform_device_register_simple( 11657 TPACPI_HWMON_DRVR_NAME, 11658 PLATFORM_DEVID_NONE, NULL, 0); 11659 if (IS_ERR(tpacpi_sensors_pdev)) { 11660 ret = PTR_ERR(tpacpi_sensors_pdev); 11661 tpacpi_sensors_pdev = NULL; 11662 pr_err("unable to register hwmon platform device\n"); 11663 thinkpad_acpi_module_exit(); 11664 return ret; 11665 } 11666 11667 mutex_init(&tpacpi_inputdev_send_mutex); 11668 tpacpi_inputdev = input_allocate_device(); 11669 if (!tpacpi_inputdev) { 11670 thinkpad_acpi_module_exit(); 11671 return -ENOMEM; 11672 } else { 11673 /* Prepare input device, but don't register */ 11674 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 11675 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 11676 tpacpi_inputdev->id.bustype = BUS_HOST; 11677 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 11678 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 11679 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 11680 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 11681 } 11682 11683 /* Init subdriver dependencies */ 11684 tpacpi_detect_brightness_capabilities(); 11685 11686 /* Init subdrivers */ 11687 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 11688 ret = ibm_init(&ibms_init[i]); 11689 if (ret >= 0 && *ibms_init[i].param) 11690 ret = ibms_init[i].data->write(ibms_init[i].param); 11691 if (ret < 0) { 11692 thinkpad_acpi_module_exit(); 11693 return ret; 11694 } 11695 } 11696 11697 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 11698 11699 ret = platform_driver_register(&tpacpi_pdriver); 11700 if (ret) { 11701 pr_err("unable to register main platform driver\n"); 11702 thinkpad_acpi_module_exit(); 11703 return ret; 11704 } 11705 tp_features.platform_drv_registered = 1; 11706 11707 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 11708 if (ret) { 11709 pr_err("unable to register hwmon platform driver\n"); 11710 thinkpad_acpi_module_exit(); 11711 return ret; 11712 } 11713 tp_features.sensors_pdrv_registered = 1; 11714 11715 tpacpi_hwmon = hwmon_device_register_with_groups( 11716 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, tpacpi_hwmon_groups); 11717 if (IS_ERR(tpacpi_hwmon)) { 11718 ret = PTR_ERR(tpacpi_hwmon); 11719 tpacpi_hwmon = NULL; 11720 pr_err("unable to register hwmon device\n"); 11721 thinkpad_acpi_module_exit(); 11722 return ret; 11723 } 11724 11725 ret = input_register_device(tpacpi_inputdev); 11726 if (ret < 0) { 11727 pr_err("unable to register input device\n"); 11728 thinkpad_acpi_module_exit(); 11729 return ret; 11730 } else { 11731 tp_features.input_device_registered = 1; 11732 } 11733 11734 return 0; 11735 } 11736 11737 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 11738 11739 /* 11740 * This will autoload the driver in almost every ThinkPad 11741 * in widespread use. 11742 * 11743 * Only _VERY_ old models, like the 240, 240x and 570 lack 11744 * the HKEY event interface. 11745 */ 11746 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 11747 11748 /* 11749 * DMI matching for module autoloading 11750 * 11751 * See https://thinkwiki.org/wiki/List_of_DMI_IDs 11752 * See https://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 11753 * 11754 * Only models listed in thinkwiki will be supported, so add yours 11755 * if it is not there yet. 11756 */ 11757 #define IBM_BIOS_MODULE_ALIAS(__type) \ 11758 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 11759 11760 /* Ancient thinkpad BIOSes have to be identified by 11761 * BIOS type or model number, and there are far less 11762 * BIOS types than model numbers... */ 11763 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 11764 11765 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 11766 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 11767 MODULE_DESCRIPTION(TPACPI_DESC); 11768 MODULE_VERSION(TPACPI_VERSION); 11769 MODULE_LICENSE("GPL"); 11770 11771 module_init(thinkpad_acpi_module_init); 11772 module_exit(thinkpad_acpi_module_exit); 11773