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 mutex_lock(&hotkey_mutex); 3046 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3047 hotkey_poll_stop_sync(); 3048 #endif 3049 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3050 "restoring original HKEY status and mask\n"); 3051 /* yes, there is a bitwise or below, we want the 3052 * functions to be called even if one of them fail */ 3053 if (((tp_features.hotkey_mask && 3054 hotkey_mask_set(hotkey_orig_mask)) | 3055 hotkey_status_set(false)) != 0) 3056 pr_err("failed to restore hot key mask to BIOS defaults\n"); 3057 3058 mutex_unlock(&hotkey_mutex); 3059 } 3060 3061 static void __init hotkey_unmap(const unsigned int scancode) 3062 { 3063 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3064 clear_bit(hotkey_keycode_map[scancode], 3065 tpacpi_inputdev->keybit); 3066 hotkey_keycode_map[scancode] = KEY_RESERVED; 3067 } 3068 } 3069 3070 /* 3071 * HKEY quirks: 3072 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3073 */ 3074 3075 #define TPACPI_HK_Q_INIMASK 0x0001 3076 3077 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3078 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3079 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3080 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3081 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3082 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3083 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3084 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3085 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3086 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3087 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3088 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3089 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3090 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3091 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3092 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3093 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3094 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3095 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3096 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3097 }; 3098 3099 typedef u16 tpacpi_keymap_entry_t; 3100 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3101 3102 static int hotkey_init_tablet_mode(void) 3103 { 3104 int in_tablet_mode = 0, res; 3105 char *type = NULL; 3106 3107 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) { 3108 int has_tablet_mode; 3109 3110 in_tablet_mode = hotkey_gmms_get_tablet_mode(res, 3111 &has_tablet_mode); 3112 /* 3113 * The Yoga 11e series has 2 accelerometers described by a 3114 * BOSC0200 ACPI node. This setup relies on a Windows service 3115 * which calls special ACPI methods on this node to report 3116 * the laptop/tent/tablet mode to the EC. The bmc150 iio driver 3117 * does not support this, so skip the hotkey on these models. 3118 */ 3119 if (has_tablet_mode && !dual_accel_detect()) 3120 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS; 3121 type = "GMMS"; 3122 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { 3123 /* For X41t, X60t, X61t Tablets... */ 3124 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; 3125 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); 3126 type = "MHKG"; 3127 } 3128 3129 if (!tp_features.hotkey_tablet) 3130 return 0; 3131 3132 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", 3133 type, in_tablet_mode ? "tablet" : "laptop"); 3134 3135 return in_tablet_mode; 3136 } 3137 3138 static int __init hotkey_init(struct ibm_init_struct *iibm) 3139 { 3140 /* Requirements for changing the default keymaps: 3141 * 3142 * 1. Many of the keys are mapped to KEY_RESERVED for very 3143 * good reasons. Do not change them unless you have deep 3144 * knowledge on the IBM and Lenovo ThinkPad firmware for 3145 * the various ThinkPad models. The driver behaves 3146 * differently for KEY_RESERVED: such keys have their 3147 * hot key mask *unset* in mask_recommended, and also 3148 * in the initial hot key mask programmed into the 3149 * firmware at driver load time, which means the firm- 3150 * ware may react very differently if you change them to 3151 * something else; 3152 * 3153 * 2. You must be subscribed to the linux-thinkpad and 3154 * ibm-acpi-devel mailing lists, and you should read the 3155 * list archives since 2007 if you want to change the 3156 * keymaps. This requirement exists so that you will 3157 * know the past history of problems with the thinkpad- 3158 * acpi driver keymaps, and also that you will be 3159 * listening to any bug reports; 3160 * 3161 * 3. Do not send thinkpad-acpi specific patches directly to 3162 * for merging, *ever*. Send them to the linux-acpi 3163 * mailinglist for comments. Merging is to be done only 3164 * through acpi-test and the ACPI maintainer. 3165 * 3166 * If the above is too much to ask, don't change the keymap. 3167 * Ask the thinkpad-acpi maintainer to do it, instead. 3168 */ 3169 3170 enum keymap_index { 3171 TPACPI_KEYMAP_IBM_GENERIC = 0, 3172 TPACPI_KEYMAP_LENOVO_GENERIC, 3173 }; 3174 3175 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3176 /* Generic keymap for IBM ThinkPads */ 3177 [TPACPI_KEYMAP_IBM_GENERIC] = { 3178 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3179 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3180 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3181 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3182 3183 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3184 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3185 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3186 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3187 3188 /* brightness: firmware always reacts to them */ 3189 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3190 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3191 3192 /* Thinklight: firmware always react to it */ 3193 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3194 3195 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3196 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3197 3198 /* Volume: firmware always react to it and reprograms 3199 * the built-in *extra* mixer. Never map it to control 3200 * another mixer by default. */ 3201 KEY_RESERVED, /* 0x14: VOLUME UP */ 3202 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3203 KEY_RESERVED, /* 0x16: MUTE */ 3204 3205 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3206 3207 /* (assignments unknown, please report if found) */ 3208 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3209 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3210 3211 /* No assignments, only used for Adaptive keyboards. */ 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, KEY_UNKNOWN, 3216 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3217 3218 /* No assignment, used for newer Lenovo models */ 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, KEY_UNKNOWN, KEY_UNKNOWN, 3224 KEY_UNKNOWN, KEY_UNKNOWN 3225 3226 }, 3227 3228 /* Generic keymap for Lenovo ThinkPads */ 3229 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3230 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3231 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3232 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3233 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3234 3235 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3236 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3237 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3238 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3239 3240 /* These should be enabled --only-- when ACPI video 3241 * is disabled (i.e. in "vendor" mode), and are handled 3242 * in a special way by the init code */ 3243 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3244 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3245 3246 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3247 3248 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3249 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3250 3251 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3252 * react to it and reprograms the built-in *extra* mixer. 3253 * Never map it to control another mixer by default. 3254 * 3255 * T60?, T61, R60?, R61: firmware and EC tries to send 3256 * these over the regular keyboard, so these are no-ops, 3257 * but there are still weird bugs re. MUTE, so do not 3258 * change unless you get test reports from all Lenovo 3259 * models. May cause the BIOS to interfere with the 3260 * HDA mixer. 3261 */ 3262 KEY_RESERVED, /* 0x14: VOLUME UP */ 3263 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3264 KEY_RESERVED, /* 0x16: MUTE */ 3265 3266 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3267 3268 /* (assignments unknown, please report if found) */ 3269 KEY_UNKNOWN, KEY_UNKNOWN, 3270 3271 /* 3272 * The mic mute button only sends 0x1a. It does not 3273 * automatically mute the mic or change the mute light. 3274 */ 3275 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3276 3277 /* (assignments unknown, please report if found) */ 3278 KEY_UNKNOWN, 3279 3280 /* Extra keys in use since the X240 / T440 / T540 */ 3281 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3282 3283 /* 3284 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3285 * The first item in this list is the Mute button which is 3286 * emitted with 0x103 through 3287 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3288 * symbol is held. 3289 * We'll need to offset those by 0x20. 3290 */ 3291 KEY_RESERVED, /* Mute held, 0x103 */ 3292 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3293 KEY_RESERVED, /* Clipping tool */ 3294 KEY_RESERVED, /* Cloud */ 3295 KEY_RESERVED, 3296 KEY_VOICECOMMAND, /* Voice */ 3297 KEY_RESERVED, 3298 KEY_RESERVED, /* Gestures */ 3299 KEY_RESERVED, 3300 KEY_RESERVED, 3301 KEY_RESERVED, 3302 KEY_CONFIG, /* Settings */ 3303 KEY_RESERVED, /* New tab */ 3304 KEY_REFRESH, /* Reload */ 3305 KEY_BACK, /* Back */ 3306 KEY_RESERVED, /* Microphone down */ 3307 KEY_RESERVED, /* Microphone up */ 3308 KEY_RESERVED, /* Microphone cancellation */ 3309 KEY_RESERVED, /* Camera mode */ 3310 KEY_RESERVED, /* Rotate display, 0x116 */ 3311 3312 /* 3313 * These are found in 2017 models (e.g. T470s, X270). 3314 * The lowest known value is 0x311, which according to 3315 * the manual should launch a user defined favorite 3316 * application. 3317 * 3318 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START, 3319 * corresponding to 0x34. 3320 */ 3321 3322 /* (assignments unknown, please report if found) */ 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, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3327 KEY_UNKNOWN, 3328 3329 KEY_BOOKMARKS, /* Favorite app, 0x311 */ 3330 KEY_SELECTIVE_SCREENSHOT, /* Clipping tool */ 3331 KEY_CALC, /* Calculator (above numpad, P52) */ 3332 KEY_BLUETOOTH, /* Bluetooth */ 3333 KEY_KEYBOARD, /* Keyboard, 0x315 */ 3334 KEY_FN_RIGHT_SHIFT, /* Fn + right Shift */ 3335 KEY_NOTIFICATION_CENTER, /* Notification Center */ 3336 KEY_PICKUP_PHONE, /* Answer incoming call */ 3337 KEY_HANGUP_PHONE, /* Decline incoming call */ 3338 }, 3339 }; 3340 3341 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3342 /* Generic maps (fallback) */ 3343 { 3344 .vendor = PCI_VENDOR_ID_IBM, 3345 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3346 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3347 }, 3348 { 3349 .vendor = PCI_VENDOR_ID_LENOVO, 3350 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3351 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3352 }, 3353 }; 3354 3355 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3356 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3357 3358 int res, i; 3359 int status; 3360 int hkeyv; 3361 bool radiosw_state = false; 3362 bool tabletsw_state = false; 3363 3364 unsigned long quirks; 3365 unsigned long keymap_id; 3366 3367 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3368 "initializing hotkey subdriver\n"); 3369 3370 BUG_ON(!tpacpi_inputdev); 3371 BUG_ON(tpacpi_inputdev->open != NULL || 3372 tpacpi_inputdev->close != NULL); 3373 3374 TPACPI_ACPIHANDLE_INIT(hkey); 3375 mutex_init(&hotkey_mutex); 3376 3377 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3378 mutex_init(&hotkey_thread_data_mutex); 3379 #endif 3380 3381 /* hotkey not supported on 570 */ 3382 tp_features.hotkey = hkey_handle != NULL; 3383 3384 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3385 "hotkeys are %s\n", 3386 str_supported(tp_features.hotkey)); 3387 3388 if (!tp_features.hotkey) 3389 return -ENODEV; 3390 3391 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3392 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3393 3394 tpacpi_disable_brightness_delay(); 3395 3396 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3397 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3398 for HKEY interface version 0x100 */ 3399 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3400 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3401 "firmware HKEY interface version: 0x%x\n", 3402 hkeyv); 3403 3404 switch (hkeyv >> 8) { 3405 case 1: 3406 /* 3407 * MHKV 0x100 in A31, R40, R40e, 3408 * T4x, X31, and later 3409 */ 3410 3411 /* Paranoia check AND init hotkey_all_mask */ 3412 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3413 "MHKA", "qd")) { 3414 pr_err("missing MHKA handler, please report this to %s\n", 3415 TPACPI_MAIL); 3416 /* Fallback: pre-init for FN+F3,F4,F12 */ 3417 hotkey_all_mask = 0x080cU; 3418 } else { 3419 tp_features.hotkey_mask = 1; 3420 } 3421 break; 3422 3423 case 2: 3424 /* 3425 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3426 */ 3427 3428 /* Paranoia check AND init hotkey_all_mask */ 3429 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3430 "MHKA", "dd", 1)) { 3431 pr_err("missing MHKA handler, please report this to %s\n", 3432 TPACPI_MAIL); 3433 /* Fallback: pre-init for FN+F3,F4,F12 */ 3434 hotkey_all_mask = 0x080cU; 3435 } else { 3436 tp_features.hotkey_mask = 1; 3437 } 3438 3439 /* 3440 * Check if we have an adaptive keyboard, like on the 3441 * Lenovo Carbon X1 2014 (2nd Gen). 3442 */ 3443 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3444 "MHKA", "dd", 2)) { 3445 if (hotkey_adaptive_all_mask != 0) 3446 tp_features.has_adaptive_kbd = true; 3447 } else { 3448 tp_features.has_adaptive_kbd = false; 3449 hotkey_adaptive_all_mask = 0x0U; 3450 } 3451 break; 3452 3453 default: 3454 pr_err("unknown version of the HKEY interface: 0x%x\n", 3455 hkeyv); 3456 pr_err("please report this to %s\n", TPACPI_MAIL); 3457 break; 3458 } 3459 } 3460 3461 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3462 "hotkey masks are %s\n", 3463 str_supported(tp_features.hotkey_mask)); 3464 3465 /* Init hotkey_all_mask if not initialized yet */ 3466 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3467 (quirks & TPACPI_HK_Q_INIMASK)) 3468 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3469 3470 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3471 if (tp_features.hotkey_mask) { 3472 /* hotkey_source_mask *must* be zero for 3473 * the first hotkey_mask_get to return hotkey_orig_mask */ 3474 mutex_lock(&hotkey_mutex); 3475 res = hotkey_mask_get(); 3476 mutex_unlock(&hotkey_mutex); 3477 if (res) 3478 return res; 3479 3480 hotkey_orig_mask = hotkey_acpi_mask; 3481 } else { 3482 hotkey_orig_mask = hotkey_all_mask; 3483 hotkey_acpi_mask = hotkey_all_mask; 3484 } 3485 3486 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3487 if (dbg_wlswemul) { 3488 tp_features.hotkey_wlsw = 1; 3489 radiosw_state = !!tpacpi_wlsw_emulstate; 3490 pr_info("radio switch emulation enabled\n"); 3491 } else 3492 #endif 3493 /* Not all thinkpads have a hardware radio switch */ 3494 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3495 tp_features.hotkey_wlsw = 1; 3496 radiosw_state = !!status; 3497 pr_info("radio switch found; radios are %s\n", str_enabled_disabled(status & BIT(0))); 3498 } 3499 3500 tabletsw_state = hotkey_init_tablet_mode(); 3501 3502 /* Set up key map */ 3503 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3504 ARRAY_SIZE(tpacpi_keymap_qtable)); 3505 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3506 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3507 "using keymap number %lu\n", keymap_id); 3508 3509 hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id], 3510 TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL); 3511 if (!hotkey_keycode_map) { 3512 pr_err("failed to allocate memory for key map\n"); 3513 return -ENOMEM; 3514 } 3515 3516 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3517 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3518 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3519 tpacpi_inputdev->keycode = hotkey_keycode_map; 3520 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3521 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3522 input_set_capability(tpacpi_inputdev, EV_KEY, 3523 hotkey_keycode_map[i]); 3524 } else { 3525 if (i < sizeof(hotkey_reserved_mask)*8) 3526 hotkey_reserved_mask |= 1 << i; 3527 } 3528 } 3529 3530 if (tp_features.hotkey_wlsw) { 3531 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3532 input_report_switch(tpacpi_inputdev, 3533 SW_RFKILL_ALL, radiosw_state); 3534 } 3535 if (tp_features.hotkey_tablet) { 3536 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3537 input_report_switch(tpacpi_inputdev, 3538 SW_TABLET_MODE, tabletsw_state); 3539 } 3540 3541 /* Do not issue duplicate brightness change events to 3542 * userspace. tpacpi_detect_brightness_capabilities() must have 3543 * been called before this point */ 3544 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3545 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n"); 3546 pr_notice("Disabling thinkpad-acpi brightness events by default...\n"); 3547 3548 /* Disable brightness up/down on Lenovo thinkpads when 3549 * ACPI is handling them, otherwise it is plain impossible 3550 * for userspace to do something even remotely sane */ 3551 hotkey_reserved_mask |= 3552 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3553 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3554 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3555 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3556 } 3557 3558 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3559 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3560 & ~hotkey_all_mask 3561 & ~hotkey_reserved_mask; 3562 3563 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3564 "hotkey source mask 0x%08x, polling freq %u\n", 3565 hotkey_source_mask, hotkey_poll_freq); 3566 #endif 3567 3568 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3569 "enabling firmware HKEY event interface...\n"); 3570 res = hotkey_status_set(true); 3571 if (res) { 3572 hotkey_exit(); 3573 return res; 3574 } 3575 mutex_lock(&hotkey_mutex); 3576 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3577 | hotkey_driver_mask) 3578 & ~hotkey_source_mask); 3579 mutex_unlock(&hotkey_mutex); 3580 if (res < 0 && res != -ENXIO) { 3581 hotkey_exit(); 3582 return res; 3583 } 3584 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3585 & ~hotkey_reserved_mask; 3586 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3587 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3588 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3589 3590 tpacpi_inputdev->open = &hotkey_inputdev_open; 3591 tpacpi_inputdev->close = &hotkey_inputdev_close; 3592 3593 hotkey_poll_setup_safe(true); 3594 3595 return 0; 3596 } 3597 3598 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3599 * mode, Web conference mode, Function mode and Lay-flat mode. 3600 * We support Home mode and Function mode currently. 3601 * 3602 * Will consider support rest of modes in future. 3603 * 3604 */ 3605 static const int adaptive_keyboard_modes[] = { 3606 HOME_MODE, 3607 /* WEB_BROWSER_MODE = 2, 3608 WEB_CONFERENCE_MODE = 3, */ 3609 FUNCTION_MODE 3610 }; 3611 3612 #define DFR_CHANGE_ROW 0x101 3613 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3614 #define FIRST_ADAPTIVE_KEY 0x103 3615 3616 /* press Fn key a while second, it will switch to Function Mode. Then 3617 * release Fn key, previous mode be restored. 3618 */ 3619 static bool adaptive_keyboard_mode_is_saved; 3620 static int adaptive_keyboard_prev_mode; 3621 3622 static int adaptive_keyboard_get_mode(void) 3623 { 3624 int mode = 0; 3625 3626 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3627 pr_err("Cannot read adaptive keyboard mode\n"); 3628 return -EIO; 3629 } 3630 3631 return mode; 3632 } 3633 3634 static int adaptive_keyboard_set_mode(int new_mode) 3635 { 3636 if (new_mode < 0 || 3637 new_mode > LAYFLAT_MODE) 3638 return -EINVAL; 3639 3640 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3641 pr_err("Cannot set adaptive keyboard mode\n"); 3642 return -EIO; 3643 } 3644 3645 return 0; 3646 } 3647 3648 static int adaptive_keyboard_get_next_mode(int mode) 3649 { 3650 size_t i; 3651 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3652 3653 for (i = 0; i <= max_mode; i++) { 3654 if (adaptive_keyboard_modes[i] == mode) 3655 break; 3656 } 3657 3658 if (i >= max_mode) 3659 i = 0; 3660 else 3661 i++; 3662 3663 return adaptive_keyboard_modes[i]; 3664 } 3665 3666 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3667 { 3668 int current_mode = 0; 3669 int new_mode = 0; 3670 int keycode; 3671 3672 switch (scancode) { 3673 case DFR_CHANGE_ROW: 3674 if (adaptive_keyboard_mode_is_saved) { 3675 new_mode = adaptive_keyboard_prev_mode; 3676 adaptive_keyboard_mode_is_saved = false; 3677 } else { 3678 current_mode = adaptive_keyboard_get_mode(); 3679 if (current_mode < 0) 3680 return false; 3681 new_mode = adaptive_keyboard_get_next_mode( 3682 current_mode); 3683 } 3684 3685 if (adaptive_keyboard_set_mode(new_mode) < 0) 3686 return false; 3687 3688 return true; 3689 3690 case DFR_SHOW_QUICKVIEW_ROW: 3691 current_mode = adaptive_keyboard_get_mode(); 3692 if (current_mode < 0) 3693 return false; 3694 3695 adaptive_keyboard_prev_mode = current_mode; 3696 adaptive_keyboard_mode_is_saved = true; 3697 3698 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3699 return false; 3700 return true; 3701 3702 default: 3703 if (scancode < FIRST_ADAPTIVE_KEY || 3704 scancode >= FIRST_ADAPTIVE_KEY + 3705 TP_ACPI_HOTKEYSCAN_EXTENDED_START - 3706 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3707 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3708 scancode); 3709 return false; 3710 } 3711 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + 3712 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START]; 3713 if (keycode != KEY_RESERVED) { 3714 mutex_lock(&tpacpi_inputdev_send_mutex); 3715 3716 input_report_key(tpacpi_inputdev, keycode, 1); 3717 input_sync(tpacpi_inputdev); 3718 3719 input_report_key(tpacpi_inputdev, keycode, 0); 3720 input_sync(tpacpi_inputdev); 3721 3722 mutex_unlock(&tpacpi_inputdev_send_mutex); 3723 } 3724 return true; 3725 } 3726 } 3727 3728 static bool hotkey_notify_extended_hotkey(const u32 hkey) 3729 { 3730 unsigned int scancode; 3731 3732 switch (hkey) { 3733 case TP_HKEY_EV_PRIVACYGUARD_TOGGLE: 3734 case TP_HKEY_EV_AMT_TOGGLE: 3735 tpacpi_driver_event(hkey); 3736 return true; 3737 } 3738 3739 /* Extended keycodes start at 0x300 and our offset into the map 3740 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode 3741 * will be positive, but might not be in the correct range. 3742 */ 3743 scancode = (hkey & 0xfff) - (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START); 3744 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START && 3745 scancode < TPACPI_HOTKEY_MAP_LEN) { 3746 tpacpi_input_send_key(scancode); 3747 return true; 3748 } 3749 3750 return false; 3751 } 3752 3753 static bool hotkey_notify_hotkey(const u32 hkey, 3754 bool *send_acpi_ev, 3755 bool *ignore_acpi_ev) 3756 { 3757 /* 0x1000-0x1FFF: key presses */ 3758 unsigned int scancode = hkey & 0xfff; 3759 *send_acpi_ev = true; 3760 *ignore_acpi_ev = false; 3761 3762 /* 3763 * Original events are in the 0x10XX range, the adaptive keyboard 3764 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017 3765 * models, additional keys are emitted through 0x13XX. 3766 */ 3767 switch ((hkey >> 8) & 0xf) { 3768 case 0: 3769 if (scancode > 0 && 3770 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3771 /* HKEY event 0x1001 is scancode 0x00 */ 3772 scancode--; 3773 if (!(hotkey_source_mask & (1 << scancode))) { 3774 tpacpi_input_send_key_masked(scancode); 3775 *send_acpi_ev = false; 3776 } else { 3777 *ignore_acpi_ev = true; 3778 } 3779 return true; 3780 } 3781 break; 3782 3783 case 1: 3784 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3785 3786 case 3: 3787 return hotkey_notify_extended_hotkey(hkey); 3788 } 3789 3790 return false; 3791 } 3792 3793 static bool hotkey_notify_wakeup(const u32 hkey, 3794 bool *send_acpi_ev, 3795 bool *ignore_acpi_ev) 3796 { 3797 /* 0x2000-0x2FFF: Wakeup reason */ 3798 *send_acpi_ev = true; 3799 *ignore_acpi_ev = false; 3800 3801 switch (hkey) { 3802 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3803 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3804 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3805 *ignore_acpi_ev = true; 3806 break; 3807 3808 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3809 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3810 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3811 *ignore_acpi_ev = true; 3812 break; 3813 3814 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3815 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3816 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3817 /* how to auto-heal: */ 3818 /* 2313: woke up from S3, go to S4/S5 */ 3819 /* 2413: woke up from S4, go to S5 */ 3820 break; 3821 3822 default: 3823 return false; 3824 } 3825 3826 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3827 pr_info("woke up due to a hot-unplug request...\n"); 3828 hotkey_wakeup_reason_notify_change(); 3829 } 3830 return true; 3831 } 3832 3833 static bool hotkey_notify_dockevent(const u32 hkey, 3834 bool *send_acpi_ev, 3835 bool *ignore_acpi_ev) 3836 { 3837 /* 0x4000-0x4FFF: dock-related events */ 3838 *send_acpi_ev = true; 3839 *ignore_acpi_ev = false; 3840 3841 switch (hkey) { 3842 case TP_HKEY_EV_UNDOCK_ACK: 3843 /* ACPI undock operation completed after wakeup */ 3844 hotkey_autosleep_ack = 1; 3845 pr_info("undocked\n"); 3846 hotkey_wakeup_hotunplug_complete_notify_change(); 3847 return true; 3848 3849 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3850 pr_info("docked into hotplug port replicator\n"); 3851 return true; 3852 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3853 pr_info("undocked from hotplug port replicator\n"); 3854 return true; 3855 3856 /* 3857 * Deliberately ignore attaching and detaching the keybord cover to avoid 3858 * duplicates from intel-vbtn, which already emits SW_TABLET_MODE events 3859 * to userspace. 3860 * 3861 * Please refer to the following thread for more information and a preliminary 3862 * implementation using the GTOP ("Get Tablet OPtions") interface that could be 3863 * extended to other attachment options of the ThinkPad X1 Tablet series, such as 3864 * the Pico cartridge dock module: 3865 * https://lore.kernel.org/platform-driver-x86/38cb8265-1e30-d547-9e12-b4ae290be737@a-kobel.de/ 3866 */ 3867 case TP_HKEY_EV_KBD_COVER_ATTACH: 3868 case TP_HKEY_EV_KBD_COVER_DETACH: 3869 *send_acpi_ev = false; 3870 *ignore_acpi_ev = true; 3871 return true; 3872 3873 default: 3874 return false; 3875 } 3876 } 3877 3878 static bool hotkey_notify_usrevent(const u32 hkey, 3879 bool *send_acpi_ev, 3880 bool *ignore_acpi_ev) 3881 { 3882 /* 0x5000-0x5FFF: human interface helpers */ 3883 *send_acpi_ev = true; 3884 *ignore_acpi_ev = false; 3885 3886 switch (hkey) { 3887 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3888 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3889 return true; 3890 3891 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3892 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3893 tpacpi_input_send_tabletsw(); 3894 hotkey_tablet_mode_notify_change(); 3895 *send_acpi_ev = false; 3896 return true; 3897 3898 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3899 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3900 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3901 /* do not propagate these events */ 3902 *ignore_acpi_ev = true; 3903 return true; 3904 3905 default: 3906 return false; 3907 } 3908 } 3909 3910 static void thermal_dump_all_sensors(void); 3911 static void palmsensor_refresh(void); 3912 3913 static bool hotkey_notify_6xxx(const u32 hkey, 3914 bool *send_acpi_ev, 3915 bool *ignore_acpi_ev) 3916 { 3917 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 3918 *send_acpi_ev = true; 3919 *ignore_acpi_ev = false; 3920 3921 switch (hkey) { 3922 case TP_HKEY_EV_THM_TABLE_CHANGED: 3923 pr_debug("EC reports: Thermal Table has changed\n"); 3924 /* recommended action: do nothing, we don't have 3925 * Lenovo ATM information */ 3926 return true; 3927 case TP_HKEY_EV_THM_CSM_COMPLETED: 3928 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n"); 3929 /* Thermal event - pass on to event handler */ 3930 tpacpi_driver_event(hkey); 3931 return true; 3932 case TP_HKEY_EV_THM_TRANSFM_CHANGED: 3933 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n"); 3934 /* recommended action: do nothing, we don't have 3935 * Lenovo ATM information */ 3936 return true; 3937 case TP_HKEY_EV_ALARM_BAT_HOT: 3938 pr_crit("THERMAL ALARM: battery is too hot!\n"); 3939 /* recommended action: warn user through gui */ 3940 break; 3941 case TP_HKEY_EV_ALARM_BAT_XHOT: 3942 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 3943 /* recommended action: immediate sleep/hibernate */ 3944 break; 3945 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3946 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n"); 3947 /* recommended action: warn user through gui, that */ 3948 /* some internal component is too hot */ 3949 break; 3950 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3951 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n"); 3952 /* recommended action: immediate sleep/hibernate */ 3953 break; 3954 case TP_HKEY_EV_AC_CHANGED: 3955 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 3956 * AC status changed; can be triggered by plugging or 3957 * unplugging AC adapter, docking or undocking. */ 3958 3959 fallthrough; 3960 3961 case TP_HKEY_EV_KEY_NUMLOCK: 3962 case TP_HKEY_EV_KEY_FN: 3963 /* key press events, we just ignore them as long as the EC 3964 * is still reporting them in the normal keyboard stream */ 3965 *send_acpi_ev = false; 3966 *ignore_acpi_ev = true; 3967 return true; 3968 3969 case TP_HKEY_EV_KEY_FN_ESC: 3970 /* Get the media key status to force the status LED to update */ 3971 acpi_evalf(hkey_handle, NULL, "GMKS", "v"); 3972 *send_acpi_ev = false; 3973 *ignore_acpi_ev = true; 3974 return true; 3975 3976 case TP_HKEY_EV_TABLET_CHANGED: 3977 tpacpi_input_send_tabletsw(); 3978 hotkey_tablet_mode_notify_change(); 3979 *send_acpi_ev = false; 3980 return true; 3981 3982 case TP_HKEY_EV_PALM_DETECTED: 3983 case TP_HKEY_EV_PALM_UNDETECTED: 3984 /* palm detected - pass on to event handler */ 3985 palmsensor_refresh(); 3986 return true; 3987 3988 default: 3989 /* report simply as unknown, no sensor dump */ 3990 return false; 3991 } 3992 3993 thermal_dump_all_sensors(); 3994 return true; 3995 } 3996 3997 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3998 { 3999 u32 hkey; 4000 bool send_acpi_ev; 4001 bool ignore_acpi_ev; 4002 bool known_ev; 4003 4004 if (event != 0x80) { 4005 pr_err("unknown HKEY notification event %d\n", event); 4006 /* forward it to userspace, maybe it knows how to handle it */ 4007 acpi_bus_generate_netlink_event( 4008 ibm->acpi->device->pnp.device_class, 4009 dev_name(&ibm->acpi->device->dev), 4010 event, 0); 4011 return; 4012 } 4013 4014 while (1) { 4015 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 4016 pr_err("failed to retrieve HKEY event\n"); 4017 return; 4018 } 4019 4020 if (hkey == 0) { 4021 /* queue empty */ 4022 return; 4023 } 4024 4025 send_acpi_ev = true; 4026 ignore_acpi_ev = false; 4027 4028 switch (hkey >> 12) { 4029 case 1: 4030 /* 0x1000-0x1FFF: key presses */ 4031 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 4032 &ignore_acpi_ev); 4033 break; 4034 case 2: 4035 /* 0x2000-0x2FFF: Wakeup reason */ 4036 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 4037 &ignore_acpi_ev); 4038 break; 4039 case 3: 4040 /* 0x3000-0x3FFF: bay-related wakeups */ 4041 switch (hkey) { 4042 case TP_HKEY_EV_BAYEJ_ACK: 4043 hotkey_autosleep_ack = 1; 4044 pr_info("bay ejected\n"); 4045 hotkey_wakeup_hotunplug_complete_notify_change(); 4046 known_ev = true; 4047 break; 4048 case TP_HKEY_EV_OPTDRV_EJ: 4049 /* FIXME: kick libata if SATA link offline */ 4050 known_ev = true; 4051 break; 4052 default: 4053 known_ev = false; 4054 } 4055 break; 4056 case 4: 4057 /* 0x4000-0x4FFF: dock-related events */ 4058 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 4059 &ignore_acpi_ev); 4060 break; 4061 case 5: 4062 /* 0x5000-0x5FFF: human interface helpers */ 4063 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 4064 &ignore_acpi_ev); 4065 break; 4066 case 6: 4067 /* 0x6000-0x6FFF: thermal alarms/notices and 4068 * keyboard events */ 4069 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 4070 &ignore_acpi_ev); 4071 break; 4072 case 7: 4073 /* 0x7000-0x7FFF: misc */ 4074 if (tp_features.hotkey_wlsw && 4075 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 4076 tpacpi_send_radiosw_update(); 4077 send_acpi_ev = 0; 4078 known_ev = true; 4079 break; 4080 } 4081 fallthrough; /* to default */ 4082 default: 4083 known_ev = false; 4084 } 4085 if (!known_ev) { 4086 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4087 pr_notice("please report the conditions when this event happened to %s\n", 4088 TPACPI_MAIL); 4089 } 4090 4091 /* netlink events */ 4092 if (!ignore_acpi_ev && send_acpi_ev) { 4093 acpi_bus_generate_netlink_event( 4094 ibm->acpi->device->pnp.device_class, 4095 dev_name(&ibm->acpi->device->dev), 4096 event, hkey); 4097 } 4098 } 4099 } 4100 4101 static void hotkey_suspend(void) 4102 { 4103 /* Do these on suspend, we get the events on early resume! */ 4104 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4105 hotkey_autosleep_ack = 0; 4106 4107 /* save previous mode of adaptive keyboard of X1 Carbon */ 4108 if (tp_features.has_adaptive_kbd) { 4109 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4110 "GTRW", "dd", 0)) { 4111 pr_err("Cannot read adaptive keyboard mode.\n"); 4112 } 4113 } 4114 } 4115 4116 static void hotkey_resume(void) 4117 { 4118 tpacpi_disable_brightness_delay(); 4119 4120 mutex_lock(&hotkey_mutex); 4121 if (hotkey_status_set(true) < 0 || 4122 hotkey_mask_set(hotkey_acpi_mask) < 0) 4123 pr_err("error while attempting to reset the event firmware interface\n"); 4124 mutex_unlock(&hotkey_mutex); 4125 4126 tpacpi_send_radiosw_update(); 4127 tpacpi_input_send_tabletsw(); 4128 hotkey_tablet_mode_notify_change(); 4129 hotkey_wakeup_reason_notify_change(); 4130 hotkey_wakeup_hotunplug_complete_notify_change(); 4131 hotkey_poll_setup_safe(false); 4132 4133 /* restore previous mode of adapive keyboard of X1 Carbon */ 4134 if (tp_features.has_adaptive_kbd) { 4135 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4136 adaptive_keyboard_prev_mode)) { 4137 pr_err("Cannot set adaptive keyboard mode.\n"); 4138 } 4139 } 4140 } 4141 4142 /* procfs -------------------------------------------------------------- */ 4143 static int hotkey_read(struct seq_file *m) 4144 { 4145 int res, status; 4146 4147 if (!tp_features.hotkey) { 4148 seq_printf(m, "status:\t\tnot supported\n"); 4149 return 0; 4150 } 4151 4152 if (mutex_lock_killable(&hotkey_mutex)) 4153 return -ERESTARTSYS; 4154 res = hotkey_status_get(&status); 4155 if (!res) 4156 res = hotkey_mask_get(); 4157 mutex_unlock(&hotkey_mutex); 4158 if (res) 4159 return res; 4160 4161 seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status & BIT(0))); 4162 if (hotkey_all_mask) { 4163 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4164 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4165 } else { 4166 seq_printf(m, "mask:\t\tnot supported\n"); 4167 seq_printf(m, "commands:\tenable, disable, reset\n"); 4168 } 4169 4170 return 0; 4171 } 4172 4173 static void hotkey_enabledisable_warn(bool enable) 4174 { 4175 tpacpi_log_usertask("procfs hotkey enable/disable"); 4176 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4177 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n"))) 4178 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n"); 4179 } 4180 4181 static int hotkey_write(char *buf) 4182 { 4183 int res; 4184 u32 mask; 4185 char *cmd; 4186 4187 if (!tp_features.hotkey) 4188 return -ENODEV; 4189 4190 if (mutex_lock_killable(&hotkey_mutex)) 4191 return -ERESTARTSYS; 4192 4193 mask = hotkey_user_mask; 4194 4195 res = 0; 4196 while ((cmd = strsep(&buf, ","))) { 4197 if (strstarts(cmd, "enable")) { 4198 hotkey_enabledisable_warn(1); 4199 } else if (strstarts(cmd, "disable")) { 4200 hotkey_enabledisable_warn(0); 4201 res = -EPERM; 4202 } else if (strstarts(cmd, "reset")) { 4203 mask = (hotkey_all_mask | hotkey_source_mask) 4204 & ~hotkey_reserved_mask; 4205 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4206 /* mask set */ 4207 } else if (sscanf(cmd, "%x", &mask) == 1) { 4208 /* mask set */ 4209 } else { 4210 res = -EINVAL; 4211 goto errexit; 4212 } 4213 } 4214 4215 if (!res) { 4216 tpacpi_disclose_usertask("procfs hotkey", 4217 "set mask to 0x%08x\n", mask); 4218 res = hotkey_user_mask_set(mask); 4219 } 4220 4221 errexit: 4222 mutex_unlock(&hotkey_mutex); 4223 return res; 4224 } 4225 4226 static const struct acpi_device_id ibm_htk_device_ids[] = { 4227 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4228 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4229 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0}, 4230 {"", 0}, 4231 }; 4232 4233 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4234 .hid = ibm_htk_device_ids, 4235 .notify = hotkey_notify, 4236 .handle = &hkey_handle, 4237 .type = ACPI_DEVICE_NOTIFY, 4238 }; 4239 4240 static struct ibm_struct hotkey_driver_data = { 4241 .name = "hotkey", 4242 .read = hotkey_read, 4243 .write = hotkey_write, 4244 .exit = hotkey_exit, 4245 .resume = hotkey_resume, 4246 .suspend = hotkey_suspend, 4247 .acpi = &ibm_hotkey_acpidriver, 4248 }; 4249 4250 /************************************************************************* 4251 * Bluetooth subdriver 4252 */ 4253 4254 enum { 4255 /* ACPI GBDC/SBDC bits */ 4256 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4257 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4258 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4259 0 = disable, 1 = enable */ 4260 }; 4261 4262 enum { 4263 /* ACPI \BLTH commands */ 4264 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4265 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4266 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4267 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4268 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4269 }; 4270 4271 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4272 4273 static int bluetooth_get_status(void) 4274 { 4275 int status; 4276 4277 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4278 if (dbg_bluetoothemul) 4279 return (tpacpi_bluetooth_emulstate) ? 4280 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4281 #endif 4282 4283 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4284 return -EIO; 4285 4286 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4287 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4288 } 4289 4290 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4291 { 4292 int status; 4293 4294 vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s bluetooth\n", 4295 str_enable_disable(state == TPACPI_RFK_RADIO_ON)); 4296 4297 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4298 if (dbg_bluetoothemul) { 4299 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4300 return 0; 4301 } 4302 #endif 4303 4304 if (state == TPACPI_RFK_RADIO_ON) 4305 status = TP_ACPI_BLUETOOTH_RADIOSSW 4306 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4307 else 4308 status = 0; 4309 4310 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4311 return -EIO; 4312 4313 return 0; 4314 } 4315 4316 /* sysfs bluetooth enable ---------------------------------------------- */ 4317 static ssize_t bluetooth_enable_show(struct device *dev, 4318 struct device_attribute *attr, 4319 char *buf) 4320 { 4321 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4322 attr, buf); 4323 } 4324 4325 static ssize_t bluetooth_enable_store(struct device *dev, 4326 struct device_attribute *attr, 4327 const char *buf, size_t count) 4328 { 4329 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4330 attr, buf, count); 4331 } 4332 4333 static DEVICE_ATTR_RW(bluetooth_enable); 4334 4335 /* --------------------------------------------------------------------- */ 4336 4337 static struct attribute *bluetooth_attributes[] = { 4338 &dev_attr_bluetooth_enable.attr, 4339 NULL 4340 }; 4341 4342 static umode_t bluetooth_attr_is_visible(struct kobject *kobj, 4343 struct attribute *attr, int n) 4344 { 4345 return tp_features.bluetooth ? attr->mode : 0; 4346 } 4347 4348 static const struct attribute_group bluetooth_attr_group = { 4349 .is_visible = bluetooth_attr_is_visible, 4350 .attrs = bluetooth_attributes, 4351 }; 4352 4353 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4354 .get_status = bluetooth_get_status, 4355 .set_status = bluetooth_set_status, 4356 }; 4357 4358 static void bluetooth_shutdown(void) 4359 { 4360 /* Order firmware to save current state to NVRAM */ 4361 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4362 TP_ACPI_BLTH_SAVE_STATE)) 4363 pr_notice("failed to save bluetooth state to NVRAM\n"); 4364 else 4365 vdbg_printk(TPACPI_DBG_RFKILL, 4366 "bluetooth state saved to NVRAM\n"); 4367 } 4368 4369 static void bluetooth_exit(void) 4370 { 4371 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4372 bluetooth_shutdown(); 4373 } 4374 4375 static const struct dmi_system_id fwbug_list[] __initconst = { 4376 { 4377 .ident = "ThinkPad E485", 4378 .driver_data = &quirk_btusb_bug, 4379 .matches = { 4380 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4381 DMI_MATCH(DMI_BOARD_NAME, "20KU"), 4382 }, 4383 }, 4384 { 4385 .ident = "ThinkPad E585", 4386 .driver_data = &quirk_btusb_bug, 4387 .matches = { 4388 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4389 DMI_MATCH(DMI_BOARD_NAME, "20KV"), 4390 }, 4391 }, 4392 { 4393 .ident = "ThinkPad A285 - 20MW", 4394 .driver_data = &quirk_btusb_bug, 4395 .matches = { 4396 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4397 DMI_MATCH(DMI_BOARD_NAME, "20MW"), 4398 }, 4399 }, 4400 { 4401 .ident = "ThinkPad A285 - 20MX", 4402 .driver_data = &quirk_btusb_bug, 4403 .matches = { 4404 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4405 DMI_MATCH(DMI_BOARD_NAME, "20MX"), 4406 }, 4407 }, 4408 { 4409 .ident = "ThinkPad A485 - 20MU", 4410 .driver_data = &quirk_btusb_bug, 4411 .matches = { 4412 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4413 DMI_MATCH(DMI_BOARD_NAME, "20MU"), 4414 }, 4415 }, 4416 { 4417 .ident = "ThinkPad A485 - 20MV", 4418 .driver_data = &quirk_btusb_bug, 4419 .matches = { 4420 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4421 DMI_MATCH(DMI_BOARD_NAME, "20MV"), 4422 }, 4423 }, 4424 {} 4425 }; 4426 4427 static const struct pci_device_id fwbug_cards_ids[] __initconst = { 4428 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) }, 4429 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) }, 4430 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) }, 4431 {} 4432 }; 4433 4434 4435 static int __init have_bt_fwbug(void) 4436 { 4437 /* 4438 * Some AMD based ThinkPads have a firmware bug that calling 4439 * "GBDC" will cause bluetooth on Intel wireless cards blocked 4440 */ 4441 if (tp_features.quirks && tp_features.quirks->btusb_bug && 4442 pci_dev_present(fwbug_cards_ids)) { 4443 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4444 FW_BUG "disable bluetooth subdriver for Intel cards\n"); 4445 return 1; 4446 } else 4447 return 0; 4448 } 4449 4450 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4451 { 4452 int res; 4453 int status = 0; 4454 4455 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4456 "initializing bluetooth subdriver\n"); 4457 4458 TPACPI_ACPIHANDLE_INIT(hkey); 4459 4460 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4461 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4462 tp_features.bluetooth = !have_bt_fwbug() && hkey_handle && 4463 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4464 4465 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4466 "bluetooth is %s, status 0x%02x\n", 4467 str_supported(tp_features.bluetooth), 4468 status); 4469 4470 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4471 if (dbg_bluetoothemul) { 4472 tp_features.bluetooth = 1; 4473 pr_info("bluetooth switch emulation enabled\n"); 4474 } else 4475 #endif 4476 if (tp_features.bluetooth && 4477 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4478 /* no bluetooth hardware present in system */ 4479 tp_features.bluetooth = 0; 4480 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4481 "bluetooth hardware not installed\n"); 4482 } 4483 4484 if (!tp_features.bluetooth) 4485 return -ENODEV; 4486 4487 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4488 &bluetooth_tprfk_ops, 4489 RFKILL_TYPE_BLUETOOTH, 4490 TPACPI_RFK_BLUETOOTH_SW_NAME, 4491 true); 4492 return res; 4493 } 4494 4495 /* procfs -------------------------------------------------------------- */ 4496 static int bluetooth_read(struct seq_file *m) 4497 { 4498 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4499 } 4500 4501 static int bluetooth_write(char *buf) 4502 { 4503 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4504 } 4505 4506 static struct ibm_struct bluetooth_driver_data = { 4507 .name = "bluetooth", 4508 .read = bluetooth_read, 4509 .write = bluetooth_write, 4510 .exit = bluetooth_exit, 4511 .shutdown = bluetooth_shutdown, 4512 }; 4513 4514 /************************************************************************* 4515 * Wan subdriver 4516 */ 4517 4518 enum { 4519 /* ACPI GWAN/SWAN bits */ 4520 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4521 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4522 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4523 0 = disable, 1 = enable */ 4524 }; 4525 4526 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4527 4528 static int wan_get_status(void) 4529 { 4530 int status; 4531 4532 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4533 if (dbg_wwanemul) 4534 return (tpacpi_wwan_emulstate) ? 4535 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4536 #endif 4537 4538 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4539 return -EIO; 4540 4541 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4542 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4543 } 4544 4545 static int wan_set_status(enum tpacpi_rfkill_state state) 4546 { 4547 int status; 4548 4549 vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s wwan\n", 4550 str_enable_disable(state == TPACPI_RFK_RADIO_ON)); 4551 4552 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4553 if (dbg_wwanemul) { 4554 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4555 return 0; 4556 } 4557 #endif 4558 4559 if (state == TPACPI_RFK_RADIO_ON) 4560 status = TP_ACPI_WANCARD_RADIOSSW 4561 | TP_ACPI_WANCARD_RESUMECTRL; 4562 else 4563 status = 0; 4564 4565 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4566 return -EIO; 4567 4568 return 0; 4569 } 4570 4571 /* sysfs wan enable ---------------------------------------------------- */ 4572 static ssize_t wan_enable_show(struct device *dev, 4573 struct device_attribute *attr, 4574 char *buf) 4575 { 4576 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4577 attr, buf); 4578 } 4579 4580 static ssize_t wan_enable_store(struct device *dev, 4581 struct device_attribute *attr, 4582 const char *buf, size_t count) 4583 { 4584 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4585 attr, buf, count); 4586 } 4587 4588 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4589 wan_enable_show, wan_enable_store); 4590 4591 /* --------------------------------------------------------------------- */ 4592 4593 static struct attribute *wan_attributes[] = { 4594 &dev_attr_wwan_enable.attr, 4595 NULL 4596 }; 4597 4598 static umode_t wan_attr_is_visible(struct kobject *kobj, struct attribute *attr, 4599 int n) 4600 { 4601 return tp_features.wan ? attr->mode : 0; 4602 } 4603 4604 static const struct attribute_group wan_attr_group = { 4605 .is_visible = wan_attr_is_visible, 4606 .attrs = wan_attributes, 4607 }; 4608 4609 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4610 .get_status = wan_get_status, 4611 .set_status = wan_set_status, 4612 }; 4613 4614 static void wan_shutdown(void) 4615 { 4616 /* Order firmware to save current state to NVRAM */ 4617 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4618 TP_ACPI_WGSV_SAVE_STATE)) 4619 pr_notice("failed to save WWAN state to NVRAM\n"); 4620 else 4621 vdbg_printk(TPACPI_DBG_RFKILL, 4622 "WWAN state saved to NVRAM\n"); 4623 } 4624 4625 static void wan_exit(void) 4626 { 4627 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4628 wan_shutdown(); 4629 } 4630 4631 static int __init wan_init(struct ibm_init_struct *iibm) 4632 { 4633 int res; 4634 int status = 0; 4635 4636 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4637 "initializing wan subdriver\n"); 4638 4639 TPACPI_ACPIHANDLE_INIT(hkey); 4640 4641 tp_features.wan = hkey_handle && 4642 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4643 4644 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4645 "wan is %s, status 0x%02x\n", 4646 str_supported(tp_features.wan), 4647 status); 4648 4649 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4650 if (dbg_wwanemul) { 4651 tp_features.wan = 1; 4652 pr_info("wwan switch emulation enabled\n"); 4653 } else 4654 #endif 4655 if (tp_features.wan && 4656 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4657 /* no wan hardware present in system */ 4658 tp_features.wan = 0; 4659 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4660 "wan hardware not installed\n"); 4661 } 4662 4663 if (!tp_features.wan) 4664 return -ENODEV; 4665 4666 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4667 &wan_tprfk_ops, 4668 RFKILL_TYPE_WWAN, 4669 TPACPI_RFK_WWAN_SW_NAME, 4670 true); 4671 return res; 4672 } 4673 4674 /* procfs -------------------------------------------------------------- */ 4675 static int wan_read(struct seq_file *m) 4676 { 4677 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4678 } 4679 4680 static int wan_write(char *buf) 4681 { 4682 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4683 } 4684 4685 static struct ibm_struct wan_driver_data = { 4686 .name = "wan", 4687 .read = wan_read, 4688 .write = wan_write, 4689 .exit = wan_exit, 4690 .shutdown = wan_shutdown, 4691 }; 4692 4693 /************************************************************************* 4694 * UWB subdriver 4695 */ 4696 4697 enum { 4698 /* ACPI GUWB/SUWB bits */ 4699 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4700 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4701 }; 4702 4703 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4704 4705 static int uwb_get_status(void) 4706 { 4707 int status; 4708 4709 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4710 if (dbg_uwbemul) 4711 return (tpacpi_uwb_emulstate) ? 4712 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4713 #endif 4714 4715 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4716 return -EIO; 4717 4718 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4719 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4720 } 4721 4722 static int uwb_set_status(enum tpacpi_rfkill_state state) 4723 { 4724 int status; 4725 4726 vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s UWB\n", 4727 str_enable_disable(state == TPACPI_RFK_RADIO_ON)); 4728 4729 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4730 if (dbg_uwbemul) { 4731 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4732 return 0; 4733 } 4734 #endif 4735 4736 if (state == TPACPI_RFK_RADIO_ON) 4737 status = TP_ACPI_UWB_RADIOSSW; 4738 else 4739 status = 0; 4740 4741 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4742 return -EIO; 4743 4744 return 0; 4745 } 4746 4747 /* --------------------------------------------------------------------- */ 4748 4749 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4750 .get_status = uwb_get_status, 4751 .set_status = uwb_set_status, 4752 }; 4753 4754 static void uwb_exit(void) 4755 { 4756 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4757 } 4758 4759 static int __init uwb_init(struct ibm_init_struct *iibm) 4760 { 4761 int res; 4762 int status = 0; 4763 4764 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4765 "initializing uwb subdriver\n"); 4766 4767 TPACPI_ACPIHANDLE_INIT(hkey); 4768 4769 tp_features.uwb = hkey_handle && 4770 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4771 4772 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4773 "uwb is %s, status 0x%02x\n", 4774 str_supported(tp_features.uwb), 4775 status); 4776 4777 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4778 if (dbg_uwbemul) { 4779 tp_features.uwb = 1; 4780 pr_info("uwb switch emulation enabled\n"); 4781 } else 4782 #endif 4783 if (tp_features.uwb && 4784 !(status & TP_ACPI_UWB_HWPRESENT)) { 4785 /* no uwb hardware present in system */ 4786 tp_features.uwb = 0; 4787 dbg_printk(TPACPI_DBG_INIT, 4788 "uwb hardware not installed\n"); 4789 } 4790 4791 if (!tp_features.uwb) 4792 return -ENODEV; 4793 4794 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4795 &uwb_tprfk_ops, 4796 RFKILL_TYPE_UWB, 4797 TPACPI_RFK_UWB_SW_NAME, 4798 false); 4799 return res; 4800 } 4801 4802 static struct ibm_struct uwb_driver_data = { 4803 .name = "uwb", 4804 .exit = uwb_exit, 4805 .flags.experimental = 1, 4806 }; 4807 4808 /************************************************************************* 4809 * Video subdriver 4810 */ 4811 4812 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4813 4814 enum video_access_mode { 4815 TPACPI_VIDEO_NONE = 0, 4816 TPACPI_VIDEO_570, /* 570 */ 4817 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4818 TPACPI_VIDEO_NEW, /* all others */ 4819 }; 4820 4821 enum { /* video status flags, based on VIDEO_570 */ 4822 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4823 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4824 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4825 }; 4826 4827 enum { /* TPACPI_VIDEO_570 constants */ 4828 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4829 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4830 * video_status_flags */ 4831 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4832 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4833 }; 4834 4835 static enum video_access_mode video_supported; 4836 static int video_orig_autosw; 4837 4838 static int video_autosw_get(void); 4839 static int video_autosw_set(int enable); 4840 4841 TPACPI_HANDLE(vid, root, 4842 "\\_SB.PCI.AGP.VGA", /* 570 */ 4843 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4844 "\\_SB.PCI0.VID0", /* 770e */ 4845 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4846 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4847 "\\_SB.PCI0.AGP.VID", /* all others */ 4848 ); /* R30, R31 */ 4849 4850 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4851 4852 static int __init video_init(struct ibm_init_struct *iibm) 4853 { 4854 int ivga; 4855 4856 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4857 4858 TPACPI_ACPIHANDLE_INIT(vid); 4859 if (tpacpi_is_ibm()) 4860 TPACPI_ACPIHANDLE_INIT(vid2); 4861 4862 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4863 /* G41, assume IVGA doesn't change */ 4864 vid_handle = vid2_handle; 4865 4866 if (!vid_handle) 4867 /* video switching not supported on R30, R31 */ 4868 video_supported = TPACPI_VIDEO_NONE; 4869 else if (tpacpi_is_ibm() && 4870 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4871 /* 570 */ 4872 video_supported = TPACPI_VIDEO_570; 4873 else if (tpacpi_is_ibm() && 4874 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4875 /* 600e/x, 770e, 770x */ 4876 video_supported = TPACPI_VIDEO_770; 4877 else 4878 /* all others */ 4879 video_supported = TPACPI_VIDEO_NEW; 4880 4881 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4882 str_supported(video_supported != TPACPI_VIDEO_NONE), 4883 video_supported); 4884 4885 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : -ENODEV; 4886 } 4887 4888 static void video_exit(void) 4889 { 4890 dbg_printk(TPACPI_DBG_EXIT, 4891 "restoring original video autoswitch mode\n"); 4892 if (video_autosw_set(video_orig_autosw)) 4893 pr_err("error while trying to restore original video autoswitch mode\n"); 4894 } 4895 4896 static int video_outputsw_get(void) 4897 { 4898 int status = 0; 4899 int i; 4900 4901 switch (video_supported) { 4902 case TPACPI_VIDEO_570: 4903 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4904 TP_ACPI_VIDEO_570_PHSCMD)) 4905 return -EIO; 4906 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4907 break; 4908 case TPACPI_VIDEO_770: 4909 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4910 return -EIO; 4911 if (i) 4912 status |= TP_ACPI_VIDEO_S_LCD; 4913 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4914 return -EIO; 4915 if (i) 4916 status |= TP_ACPI_VIDEO_S_CRT; 4917 break; 4918 case TPACPI_VIDEO_NEW: 4919 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4920 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4921 return -EIO; 4922 if (i) 4923 status |= TP_ACPI_VIDEO_S_CRT; 4924 4925 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4926 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4927 return -EIO; 4928 if (i) 4929 status |= TP_ACPI_VIDEO_S_LCD; 4930 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4931 return -EIO; 4932 if (i) 4933 status |= TP_ACPI_VIDEO_S_DVI; 4934 break; 4935 default: 4936 return -ENOSYS; 4937 } 4938 4939 return status; 4940 } 4941 4942 static int video_outputsw_set(int status) 4943 { 4944 int autosw; 4945 int res = 0; 4946 4947 switch (video_supported) { 4948 case TPACPI_VIDEO_570: 4949 res = acpi_evalf(NULL, NULL, 4950 "\\_SB.PHS2", "vdd", 4951 TP_ACPI_VIDEO_570_PHS2CMD, 4952 status | TP_ACPI_VIDEO_570_PHS2SET); 4953 break; 4954 case TPACPI_VIDEO_770: 4955 autosw = video_autosw_get(); 4956 if (autosw < 0) 4957 return autosw; 4958 4959 res = video_autosw_set(1); 4960 if (res) 4961 return res; 4962 res = acpi_evalf(vid_handle, NULL, 4963 "ASWT", "vdd", status * 0x100, 0); 4964 if (!autosw && video_autosw_set(autosw)) { 4965 pr_err("video auto-switch left enabled due to error\n"); 4966 return -EIO; 4967 } 4968 break; 4969 case TPACPI_VIDEO_NEW: 4970 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4971 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4972 break; 4973 default: 4974 return -ENOSYS; 4975 } 4976 4977 return (res) ? 0 : -EIO; 4978 } 4979 4980 static int video_autosw_get(void) 4981 { 4982 int autosw = 0; 4983 4984 switch (video_supported) { 4985 case TPACPI_VIDEO_570: 4986 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4987 return -EIO; 4988 break; 4989 case TPACPI_VIDEO_770: 4990 case TPACPI_VIDEO_NEW: 4991 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4992 return -EIO; 4993 break; 4994 default: 4995 return -ENOSYS; 4996 } 4997 4998 return autosw & 1; 4999 } 5000 5001 static int video_autosw_set(int enable) 5002 { 5003 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 5004 return -EIO; 5005 return 0; 5006 } 5007 5008 static int video_outputsw_cycle(void) 5009 { 5010 int autosw = video_autosw_get(); 5011 int res; 5012 5013 if (autosw < 0) 5014 return autosw; 5015 5016 switch (video_supported) { 5017 case TPACPI_VIDEO_570: 5018 res = video_autosw_set(1); 5019 if (res) 5020 return res; 5021 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 5022 break; 5023 case TPACPI_VIDEO_770: 5024 case TPACPI_VIDEO_NEW: 5025 res = video_autosw_set(1); 5026 if (res) 5027 return res; 5028 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 5029 break; 5030 default: 5031 return -ENOSYS; 5032 } 5033 if (!autosw && video_autosw_set(autosw)) { 5034 pr_err("video auto-switch left enabled due to error\n"); 5035 return -EIO; 5036 } 5037 5038 return (res) ? 0 : -EIO; 5039 } 5040 5041 static int video_expand_toggle(void) 5042 { 5043 switch (video_supported) { 5044 case TPACPI_VIDEO_570: 5045 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 5046 0 : -EIO; 5047 case TPACPI_VIDEO_770: 5048 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 5049 0 : -EIO; 5050 case TPACPI_VIDEO_NEW: 5051 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 5052 0 : -EIO; 5053 default: 5054 return -ENOSYS; 5055 } 5056 /* not reached */ 5057 } 5058 5059 static int video_read(struct seq_file *m) 5060 { 5061 int status, autosw; 5062 5063 if (video_supported == TPACPI_VIDEO_NONE) { 5064 seq_printf(m, "status:\t\tnot supported\n"); 5065 return 0; 5066 } 5067 5068 /* Even reads can crash X.org, so... */ 5069 if (!capable(CAP_SYS_ADMIN)) 5070 return -EPERM; 5071 5072 status = video_outputsw_get(); 5073 if (status < 0) 5074 return status; 5075 5076 autosw = video_autosw_get(); 5077 if (autosw < 0) 5078 return autosw; 5079 5080 seq_printf(m, "status:\t\tsupported\n"); 5081 seq_printf(m, "lcd:\t\t%s\n", str_enabled_disabled(status & BIT(0))); 5082 seq_printf(m, "crt:\t\t%s\n", str_enabled_disabled(status & BIT(1))); 5083 if (video_supported == TPACPI_VIDEO_NEW) 5084 seq_printf(m, "dvi:\t\t%s\n", str_enabled_disabled(status & BIT(3))); 5085 seq_printf(m, "auto:\t\t%s\n", str_enabled_disabled(autosw & BIT(0))); 5086 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5087 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5088 if (video_supported == TPACPI_VIDEO_NEW) 5089 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5090 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5091 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5092 5093 return 0; 5094 } 5095 5096 static int video_write(char *buf) 5097 { 5098 char *cmd; 5099 int enable, disable, status; 5100 int res; 5101 5102 if (video_supported == TPACPI_VIDEO_NONE) 5103 return -ENODEV; 5104 5105 /* Even reads can crash X.org, let alone writes... */ 5106 if (!capable(CAP_SYS_ADMIN)) 5107 return -EPERM; 5108 5109 enable = 0; 5110 disable = 0; 5111 5112 while ((cmd = strsep(&buf, ","))) { 5113 if (strstarts(cmd, "lcd_enable")) { 5114 enable |= TP_ACPI_VIDEO_S_LCD; 5115 } else if (strstarts(cmd, "lcd_disable")) { 5116 disable |= TP_ACPI_VIDEO_S_LCD; 5117 } else if (strstarts(cmd, "crt_enable")) { 5118 enable |= TP_ACPI_VIDEO_S_CRT; 5119 } else if (strstarts(cmd, "crt_disable")) { 5120 disable |= TP_ACPI_VIDEO_S_CRT; 5121 } else if (video_supported == TPACPI_VIDEO_NEW && 5122 strstarts(cmd, "dvi_enable")) { 5123 enable |= TP_ACPI_VIDEO_S_DVI; 5124 } else if (video_supported == TPACPI_VIDEO_NEW && 5125 strstarts(cmd, "dvi_disable")) { 5126 disable |= TP_ACPI_VIDEO_S_DVI; 5127 } else if (strstarts(cmd, "auto_enable")) { 5128 res = video_autosw_set(1); 5129 if (res) 5130 return res; 5131 } else if (strstarts(cmd, "auto_disable")) { 5132 res = video_autosw_set(0); 5133 if (res) 5134 return res; 5135 } else if (strstarts(cmd, "video_switch")) { 5136 res = video_outputsw_cycle(); 5137 if (res) 5138 return res; 5139 } else if (strstarts(cmd, "expand_toggle")) { 5140 res = video_expand_toggle(); 5141 if (res) 5142 return res; 5143 } else 5144 return -EINVAL; 5145 } 5146 5147 if (enable || disable) { 5148 status = video_outputsw_get(); 5149 if (status < 0) 5150 return status; 5151 res = video_outputsw_set((status & ~disable) | enable); 5152 if (res) 5153 return res; 5154 } 5155 5156 return 0; 5157 } 5158 5159 static struct ibm_struct video_driver_data = { 5160 .name = "video", 5161 .read = video_read, 5162 .write = video_write, 5163 .exit = video_exit, 5164 }; 5165 5166 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5167 5168 /************************************************************************* 5169 * Keyboard backlight subdriver 5170 */ 5171 5172 static enum led_brightness kbdlight_brightness; 5173 static DEFINE_MUTEX(kbdlight_mutex); 5174 5175 static int kbdlight_set_level(int level) 5176 { 5177 int ret = 0; 5178 5179 if (!hkey_handle) 5180 return -ENXIO; 5181 5182 mutex_lock(&kbdlight_mutex); 5183 5184 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5185 ret = -EIO; 5186 else 5187 kbdlight_brightness = level; 5188 5189 mutex_unlock(&kbdlight_mutex); 5190 5191 return ret; 5192 } 5193 5194 static int kbdlight_get_level(void) 5195 { 5196 int status = 0; 5197 5198 if (!hkey_handle) 5199 return -ENXIO; 5200 5201 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5202 return -EIO; 5203 5204 if (status < 0) 5205 return status; 5206 5207 return status & 0x3; 5208 } 5209 5210 static bool kbdlight_is_supported(void) 5211 { 5212 int status = 0; 5213 5214 if (!hkey_handle) 5215 return false; 5216 5217 if (!acpi_has_method(hkey_handle, "MLCG")) { 5218 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5219 return false; 5220 } 5221 5222 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5223 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5224 return false; 5225 } 5226 5227 if (status < 0) { 5228 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5229 return false; 5230 } 5231 5232 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5233 /* 5234 * Guessed test for keyboard backlight: 5235 * 5236 * Machines with backlight keyboard return: 5237 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5238 * b110100010010000000XX - ThinkPad x230 5239 * b010100000010000000XX - ThinkPad x240 5240 * b010100000010000000XX - ThinkPad W541 5241 * (XX is current backlight level) 5242 * 5243 * Machines without backlight keyboard return: 5244 * b10100001000000000000 - ThinkPad x230 5245 * b10110001000000000000 - ThinkPad E430 5246 * b00000000000000000000 - ThinkPad E450 5247 * 5248 * Candidate BITs for detection test (XOR): 5249 * b01000000001000000000 5250 * ^ 5251 */ 5252 return status & BIT(9); 5253 } 5254 5255 static int kbdlight_sysfs_set(struct led_classdev *led_cdev, 5256 enum led_brightness brightness) 5257 { 5258 return kbdlight_set_level(brightness); 5259 } 5260 5261 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5262 { 5263 int level; 5264 5265 level = kbdlight_get_level(); 5266 if (level < 0) 5267 return 0; 5268 5269 return level; 5270 } 5271 5272 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5273 .led_classdev = { 5274 .name = "tpacpi::kbd_backlight", 5275 .max_brightness = 2, 5276 .flags = LED_BRIGHT_HW_CHANGED, 5277 .brightness_set_blocking = &kbdlight_sysfs_set, 5278 .brightness_get = &kbdlight_sysfs_get, 5279 } 5280 }; 5281 5282 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5283 { 5284 int rc; 5285 5286 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5287 5288 TPACPI_ACPIHANDLE_INIT(hkey); 5289 5290 if (!kbdlight_is_supported()) { 5291 tp_features.kbdlight = 0; 5292 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5293 return -ENODEV; 5294 } 5295 5296 kbdlight_brightness = kbdlight_sysfs_get(NULL); 5297 tp_features.kbdlight = 1; 5298 5299 rc = led_classdev_register(&tpacpi_pdev->dev, 5300 &tpacpi_led_kbdlight.led_classdev); 5301 if (rc < 0) { 5302 tp_features.kbdlight = 0; 5303 return rc; 5304 } 5305 5306 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask | 5307 TP_ACPI_HKEY_KBD_LIGHT_MASK); 5308 return 0; 5309 } 5310 5311 static void kbdlight_exit(void) 5312 { 5313 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5314 } 5315 5316 static int kbdlight_set_level_and_update(int level) 5317 { 5318 int ret; 5319 struct led_classdev *led_cdev; 5320 5321 ret = kbdlight_set_level(level); 5322 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5323 5324 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5325 led_cdev->brightness = level; 5326 5327 return ret; 5328 } 5329 5330 static int kbdlight_read(struct seq_file *m) 5331 { 5332 int level; 5333 5334 if (!tp_features.kbdlight) { 5335 seq_printf(m, "status:\t\tnot supported\n"); 5336 } else { 5337 level = kbdlight_get_level(); 5338 if (level < 0) 5339 seq_printf(m, "status:\t\terror %d\n", level); 5340 else 5341 seq_printf(m, "status:\t\t%d\n", level); 5342 seq_printf(m, "commands:\t0, 1, 2\n"); 5343 } 5344 5345 return 0; 5346 } 5347 5348 static int kbdlight_write(char *buf) 5349 { 5350 char *cmd; 5351 int res, level = -EINVAL; 5352 5353 if (!tp_features.kbdlight) 5354 return -ENODEV; 5355 5356 while ((cmd = strsep(&buf, ","))) { 5357 res = kstrtoint(cmd, 10, &level); 5358 if (res < 0) 5359 return res; 5360 } 5361 5362 if (level >= 3 || level < 0) 5363 return -EINVAL; 5364 5365 return kbdlight_set_level_and_update(level); 5366 } 5367 5368 static void kbdlight_suspend(void) 5369 { 5370 struct led_classdev *led_cdev; 5371 5372 if (!tp_features.kbdlight) 5373 return; 5374 5375 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5376 led_update_brightness(led_cdev); 5377 led_classdev_suspend(led_cdev); 5378 } 5379 5380 static void kbdlight_resume(void) 5381 { 5382 if (!tp_features.kbdlight) 5383 return; 5384 5385 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5386 } 5387 5388 static struct ibm_struct kbdlight_driver_data = { 5389 .name = "kbdlight", 5390 .read = kbdlight_read, 5391 .write = kbdlight_write, 5392 .suspend = kbdlight_suspend, 5393 .resume = kbdlight_resume, 5394 .exit = kbdlight_exit, 5395 }; 5396 5397 /************************************************************************* 5398 * Light (thinklight) subdriver 5399 */ 5400 5401 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5402 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5403 5404 static int light_get_status(void) 5405 { 5406 int status = 0; 5407 5408 if (tp_features.light_status) { 5409 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5410 return -EIO; 5411 return (!!status); 5412 } 5413 5414 return -ENXIO; 5415 } 5416 5417 static int light_set_status(int status) 5418 { 5419 int rc; 5420 5421 if (tp_features.light) { 5422 if (cmos_handle) { 5423 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5424 (status) ? 5425 TP_CMOS_THINKLIGHT_ON : 5426 TP_CMOS_THINKLIGHT_OFF); 5427 } else { 5428 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5429 (status) ? 1 : 0); 5430 } 5431 return (rc) ? 0 : -EIO; 5432 } 5433 5434 return -ENXIO; 5435 } 5436 5437 static int light_sysfs_set(struct led_classdev *led_cdev, 5438 enum led_brightness brightness) 5439 { 5440 return light_set_status((brightness != LED_OFF) ? 5441 TPACPI_LED_ON : TPACPI_LED_OFF); 5442 } 5443 5444 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5445 { 5446 return (light_get_status() == 1) ? LED_ON : LED_OFF; 5447 } 5448 5449 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5450 .led_classdev = { 5451 .name = "tpacpi::thinklight", 5452 .max_brightness = 1, 5453 .brightness_set_blocking = &light_sysfs_set, 5454 .brightness_get = &light_sysfs_get, 5455 } 5456 }; 5457 5458 static int __init light_init(struct ibm_init_struct *iibm) 5459 { 5460 int rc; 5461 5462 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5463 5464 if (tpacpi_is_ibm()) { 5465 TPACPI_ACPIHANDLE_INIT(ledb); 5466 TPACPI_ACPIHANDLE_INIT(lght); 5467 } 5468 TPACPI_ACPIHANDLE_INIT(cmos); 5469 5470 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5471 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5472 5473 if (tp_features.light) 5474 /* light status not supported on 5475 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5476 tp_features.light_status = 5477 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5478 5479 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5480 str_supported(tp_features.light), 5481 str_supported(tp_features.light_status)); 5482 5483 if (!tp_features.light) 5484 return -ENODEV; 5485 5486 rc = led_classdev_register(&tpacpi_pdev->dev, 5487 &tpacpi_led_thinklight.led_classdev); 5488 5489 if (rc < 0) { 5490 tp_features.light = 0; 5491 tp_features.light_status = 0; 5492 } else { 5493 rc = 0; 5494 } 5495 5496 return rc; 5497 } 5498 5499 static void light_exit(void) 5500 { 5501 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5502 } 5503 5504 static int light_read(struct seq_file *m) 5505 { 5506 int status; 5507 5508 if (!tp_features.light) { 5509 seq_printf(m, "status:\t\tnot supported\n"); 5510 } else if (!tp_features.light_status) { 5511 seq_printf(m, "status:\t\tunknown\n"); 5512 seq_printf(m, "commands:\ton, off\n"); 5513 } else { 5514 status = light_get_status(); 5515 if (status < 0) 5516 return status; 5517 seq_printf(m, "status:\t\t%s\n", str_on_off(status & BIT(0))); 5518 seq_printf(m, "commands:\ton, off\n"); 5519 } 5520 5521 return 0; 5522 } 5523 5524 static int light_write(char *buf) 5525 { 5526 char *cmd; 5527 int newstatus = 0; 5528 5529 if (!tp_features.light) 5530 return -ENODEV; 5531 5532 while ((cmd = strsep(&buf, ","))) { 5533 if (strstarts(cmd, "on")) { 5534 newstatus = 1; 5535 } else if (strstarts(cmd, "off")) { 5536 newstatus = 0; 5537 } else 5538 return -EINVAL; 5539 } 5540 5541 return light_set_status(newstatus); 5542 } 5543 5544 static struct ibm_struct light_driver_data = { 5545 .name = "light", 5546 .read = light_read, 5547 .write = light_write, 5548 .exit = light_exit, 5549 }; 5550 5551 /************************************************************************* 5552 * CMOS subdriver 5553 */ 5554 5555 /* sysfs cmos_command -------------------------------------------------- */ 5556 static ssize_t cmos_command_store(struct device *dev, 5557 struct device_attribute *attr, 5558 const char *buf, size_t count) 5559 { 5560 unsigned long cmos_cmd; 5561 int res; 5562 5563 if (parse_strtoul(buf, 21, &cmos_cmd)) 5564 return -EINVAL; 5565 5566 res = issue_thinkpad_cmos_command(cmos_cmd); 5567 return (res) ? res : count; 5568 } 5569 5570 static DEVICE_ATTR_WO(cmos_command); 5571 5572 static struct attribute *cmos_attributes[] = { 5573 &dev_attr_cmos_command.attr, 5574 NULL 5575 }; 5576 5577 static umode_t cmos_attr_is_visible(struct kobject *kobj, 5578 struct attribute *attr, int n) 5579 { 5580 return cmos_handle ? attr->mode : 0; 5581 } 5582 5583 static const struct attribute_group cmos_attr_group = { 5584 .is_visible = cmos_attr_is_visible, 5585 .attrs = cmos_attributes, 5586 }; 5587 5588 /* --------------------------------------------------------------------- */ 5589 5590 static int __init cmos_init(struct ibm_init_struct *iibm) 5591 { 5592 vdbg_printk(TPACPI_DBG_INIT, 5593 "initializing cmos commands subdriver\n"); 5594 5595 TPACPI_ACPIHANDLE_INIT(cmos); 5596 5597 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5598 str_supported(cmos_handle != NULL)); 5599 5600 return cmos_handle ? 0 : -ENODEV; 5601 } 5602 5603 static int cmos_read(struct seq_file *m) 5604 { 5605 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5606 R30, R31, T20-22, X20-21 */ 5607 if (!cmos_handle) 5608 seq_printf(m, "status:\t\tnot supported\n"); 5609 else { 5610 seq_printf(m, "status:\t\tsupported\n"); 5611 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5612 } 5613 5614 return 0; 5615 } 5616 5617 static int cmos_write(char *buf) 5618 { 5619 char *cmd; 5620 int cmos_cmd, res; 5621 5622 while ((cmd = strsep(&buf, ","))) { 5623 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5624 cmos_cmd >= 0 && cmos_cmd <= 21) { 5625 /* cmos_cmd set */ 5626 } else 5627 return -EINVAL; 5628 5629 res = issue_thinkpad_cmos_command(cmos_cmd); 5630 if (res) 5631 return res; 5632 } 5633 5634 return 0; 5635 } 5636 5637 static struct ibm_struct cmos_driver_data = { 5638 .name = "cmos", 5639 .read = cmos_read, 5640 .write = cmos_write, 5641 }; 5642 5643 /************************************************************************* 5644 * LED subdriver 5645 */ 5646 5647 enum led_access_mode { 5648 TPACPI_LED_NONE = 0, 5649 TPACPI_LED_570, /* 570 */ 5650 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5651 TPACPI_LED_NEW, /* all others */ 5652 }; 5653 5654 enum { /* For TPACPI_LED_OLD */ 5655 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5656 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5657 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5658 }; 5659 5660 static enum led_access_mode led_supported; 5661 5662 static acpi_handle led_handle; 5663 5664 #define TPACPI_LED_NUMLEDS 16 5665 static struct tpacpi_led_classdev *tpacpi_leds; 5666 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5667 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5668 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5669 "tpacpi::power", 5670 "tpacpi:orange:batt", 5671 "tpacpi:green:batt", 5672 "tpacpi::dock_active", 5673 "tpacpi::bay_active", 5674 "tpacpi::dock_batt", 5675 "tpacpi::unknown_led", 5676 "tpacpi::standby", 5677 "tpacpi::dock_status1", 5678 "tpacpi::dock_status2", 5679 "tpacpi::lid_logo_dot", 5680 "tpacpi::unknown_led3", 5681 "tpacpi::thinkvantage", 5682 }; 5683 #define TPACPI_SAFE_LEDS 0x1481U 5684 5685 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5686 { 5687 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5688 return false; 5689 #else 5690 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5691 #endif 5692 } 5693 5694 static int led_get_status(const unsigned int led) 5695 { 5696 int status; 5697 enum led_status_t led_s; 5698 5699 switch (led_supported) { 5700 case TPACPI_LED_570: 5701 if (!acpi_evalf(ec_handle, 5702 &status, "GLED", "dd", 1 << led)) 5703 return -EIO; 5704 led_s = (status == 0) ? 5705 TPACPI_LED_OFF : 5706 ((status == 1) ? 5707 TPACPI_LED_ON : 5708 TPACPI_LED_BLINK); 5709 tpacpi_led_state_cache[led] = led_s; 5710 return led_s; 5711 default: 5712 return -ENXIO; 5713 } 5714 5715 /* not reached */ 5716 } 5717 5718 static int led_set_status(const unsigned int led, 5719 const enum led_status_t ledstatus) 5720 { 5721 /* off, on, blink. Index is led_status_t */ 5722 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5723 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5724 5725 int rc = 0; 5726 5727 switch (led_supported) { 5728 case TPACPI_LED_570: 5729 /* 570 */ 5730 if (unlikely(led > 7)) 5731 return -EINVAL; 5732 if (unlikely(tpacpi_is_led_restricted(led))) 5733 return -EPERM; 5734 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5735 (1 << led), led_sled_arg1[ledstatus])) 5736 return -EIO; 5737 break; 5738 case TPACPI_LED_OLD: 5739 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5740 if (unlikely(led > 7)) 5741 return -EINVAL; 5742 if (unlikely(tpacpi_is_led_restricted(led))) 5743 return -EPERM; 5744 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5745 if (rc >= 0) 5746 rc = ec_write(TPACPI_LED_EC_HLBL, 5747 (ledstatus == TPACPI_LED_BLINK) << led); 5748 if (rc >= 0) 5749 rc = ec_write(TPACPI_LED_EC_HLCL, 5750 (ledstatus != TPACPI_LED_OFF) << led); 5751 break; 5752 case TPACPI_LED_NEW: 5753 /* all others */ 5754 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5755 return -EINVAL; 5756 if (unlikely(tpacpi_is_led_restricted(led))) 5757 return -EPERM; 5758 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5759 led, led_led_arg1[ledstatus])) 5760 return -EIO; 5761 break; 5762 default: 5763 return -ENXIO; 5764 } 5765 5766 if (!rc) 5767 tpacpi_led_state_cache[led] = ledstatus; 5768 5769 return rc; 5770 } 5771 5772 static int led_sysfs_set(struct led_classdev *led_cdev, 5773 enum led_brightness brightness) 5774 { 5775 struct tpacpi_led_classdev *data = container_of(led_cdev, 5776 struct tpacpi_led_classdev, led_classdev); 5777 enum led_status_t new_state; 5778 5779 if (brightness == LED_OFF) 5780 new_state = TPACPI_LED_OFF; 5781 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5782 new_state = TPACPI_LED_ON; 5783 else 5784 new_state = TPACPI_LED_BLINK; 5785 5786 return led_set_status(data->led, new_state); 5787 } 5788 5789 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5790 unsigned long *delay_on, unsigned long *delay_off) 5791 { 5792 struct tpacpi_led_classdev *data = container_of(led_cdev, 5793 struct tpacpi_led_classdev, led_classdev); 5794 5795 /* Can we choose the flash rate? */ 5796 if (*delay_on == 0 && *delay_off == 0) { 5797 /* yes. set them to the hardware blink rate (1 Hz) */ 5798 *delay_on = 500; /* ms */ 5799 *delay_off = 500; /* ms */ 5800 } else if ((*delay_on != 500) || (*delay_off != 500)) 5801 return -EINVAL; 5802 5803 return led_set_status(data->led, TPACPI_LED_BLINK); 5804 } 5805 5806 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5807 { 5808 int rc; 5809 5810 struct tpacpi_led_classdev *data = container_of(led_cdev, 5811 struct tpacpi_led_classdev, led_classdev); 5812 5813 rc = led_get_status(data->led); 5814 5815 if (rc == TPACPI_LED_OFF || rc < 0) 5816 rc = LED_OFF; /* no error handling in led class :( */ 5817 else 5818 rc = LED_FULL; 5819 5820 return rc; 5821 } 5822 5823 static void led_exit(void) 5824 { 5825 unsigned int i; 5826 5827 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) 5828 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5829 5830 kfree(tpacpi_leds); 5831 } 5832 5833 static int __init tpacpi_init_led(unsigned int led) 5834 { 5835 /* LEDs with no name don't get registered */ 5836 if (!tpacpi_led_names[led]) 5837 return 0; 5838 5839 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set; 5840 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5841 if (led_supported == TPACPI_LED_570) 5842 tpacpi_leds[led].led_classdev.brightness_get = &led_sysfs_get; 5843 5844 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5845 tpacpi_leds[led].led_classdev.flags = LED_RETAIN_AT_SHUTDOWN; 5846 tpacpi_leds[led].led = led; 5847 5848 return led_classdev_register(&tpacpi_pdev->dev, &tpacpi_leds[led].led_classdev); 5849 } 5850 5851 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5852 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5853 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5854 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5855 5856 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5857 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5858 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5859 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5860 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5861 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5862 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5863 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5864 5865 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5866 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5867 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5868 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5869 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5870 5871 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5872 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5873 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5874 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5875 5876 /* (1) - may have excess leds enabled on MSB */ 5877 5878 /* Defaults (order matters, keep last, don't reorder!) */ 5879 { /* Lenovo */ 5880 .vendor = PCI_VENDOR_ID_LENOVO, 5881 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5882 .quirks = 0x1fffU, 5883 }, 5884 { /* IBM ThinkPads with no EC version string */ 5885 .vendor = PCI_VENDOR_ID_IBM, 5886 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5887 .quirks = 0x00ffU, 5888 }, 5889 { /* IBM ThinkPads with EC version string */ 5890 .vendor = PCI_VENDOR_ID_IBM, 5891 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5892 .quirks = 0x00bfU, 5893 }, 5894 }; 5895 5896 static enum led_access_mode __init led_init_detect_mode(void) 5897 { 5898 acpi_status status; 5899 5900 if (tpacpi_is_ibm()) { 5901 /* 570 */ 5902 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5903 if (ACPI_SUCCESS(status)) 5904 return TPACPI_LED_570; 5905 5906 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5907 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5908 if (ACPI_SUCCESS(status)) 5909 return TPACPI_LED_OLD; 5910 } 5911 5912 /* most others */ 5913 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5914 if (ACPI_SUCCESS(status)) 5915 return TPACPI_LED_NEW; 5916 5917 /* R30, R31, and unknown firmwares */ 5918 led_handle = NULL; 5919 return TPACPI_LED_NONE; 5920 } 5921 5922 static int __init led_init(struct ibm_init_struct *iibm) 5923 { 5924 unsigned int i; 5925 int rc; 5926 unsigned long useful_leds; 5927 5928 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5929 5930 led_supported = led_init_detect_mode(); 5931 5932 if (led_supported != TPACPI_LED_NONE) { 5933 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5934 ARRAY_SIZE(led_useful_qtable)); 5935 5936 if (!useful_leds) { 5937 led_handle = NULL; 5938 led_supported = TPACPI_LED_NONE; 5939 } 5940 } 5941 5942 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5943 str_supported(led_supported), led_supported); 5944 5945 if (led_supported == TPACPI_LED_NONE) 5946 return -ENODEV; 5947 5948 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds), 5949 GFP_KERNEL); 5950 if (!tpacpi_leds) { 5951 pr_err("Out of memory for LED data\n"); 5952 return -ENOMEM; 5953 } 5954 5955 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5956 tpacpi_leds[i].led = -1; 5957 5958 if (!tpacpi_is_led_restricted(i) && test_bit(i, &useful_leds)) { 5959 rc = tpacpi_init_led(i); 5960 if (rc < 0) { 5961 led_exit(); 5962 return rc; 5963 } 5964 } 5965 } 5966 5967 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5968 pr_notice("warning: userspace override of important firmware LEDs is enabled\n"); 5969 #endif 5970 return 0; 5971 } 5972 5973 #define str_led_status(s) ((s) >= TPACPI_LED_BLINK ? "blinking" : str_on_off(s)) 5974 5975 static int led_read(struct seq_file *m) 5976 { 5977 if (!led_supported) { 5978 seq_printf(m, "status:\t\tnot supported\n"); 5979 return 0; 5980 } 5981 seq_printf(m, "status:\t\tsupported\n"); 5982 5983 if (led_supported == TPACPI_LED_570) { 5984 /* 570 */ 5985 int i, status; 5986 for (i = 0; i < 8; i++) { 5987 status = led_get_status(i); 5988 if (status < 0) 5989 return -EIO; 5990 seq_printf(m, "%d:\t\t%s\n", i, str_led_status(status)); 5991 } 5992 } 5993 5994 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5995 5996 return 0; 5997 } 5998 5999 static int led_write(char *buf) 6000 { 6001 char *cmd; 6002 int led, rc; 6003 enum led_status_t s; 6004 6005 if (!led_supported) 6006 return -ENODEV; 6007 6008 while ((cmd = strsep(&buf, ","))) { 6009 if (sscanf(cmd, "%d", &led) != 1) 6010 return -EINVAL; 6011 6012 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1)) 6013 return -ENODEV; 6014 6015 if (tpacpi_leds[led].led < 0) 6016 return -ENODEV; 6017 6018 if (strstr(cmd, "off")) { 6019 s = TPACPI_LED_OFF; 6020 } else if (strstr(cmd, "on")) { 6021 s = TPACPI_LED_ON; 6022 } else if (strstr(cmd, "blink")) { 6023 s = TPACPI_LED_BLINK; 6024 } else { 6025 return -EINVAL; 6026 } 6027 6028 rc = led_set_status(led, s); 6029 if (rc < 0) 6030 return rc; 6031 } 6032 6033 return 0; 6034 } 6035 6036 static struct ibm_struct led_driver_data = { 6037 .name = "led", 6038 .read = led_read, 6039 .write = led_write, 6040 .exit = led_exit, 6041 }; 6042 6043 /************************************************************************* 6044 * Beep subdriver 6045 */ 6046 6047 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 6048 6049 #define TPACPI_BEEP_Q1 0x0001 6050 6051 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 6052 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 6053 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 6054 }; 6055 6056 static int __init beep_init(struct ibm_init_struct *iibm) 6057 { 6058 unsigned long quirks; 6059 6060 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 6061 6062 TPACPI_ACPIHANDLE_INIT(beep); 6063 6064 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 6065 str_supported(beep_handle != NULL)); 6066 6067 quirks = tpacpi_check_quirks(beep_quirk_table, 6068 ARRAY_SIZE(beep_quirk_table)); 6069 6070 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6071 6072 return (beep_handle) ? 0 : -ENODEV; 6073 } 6074 6075 static int beep_read(struct seq_file *m) 6076 { 6077 if (!beep_handle) 6078 seq_printf(m, "status:\t\tnot supported\n"); 6079 else { 6080 seq_printf(m, "status:\t\tsupported\n"); 6081 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6082 } 6083 6084 return 0; 6085 } 6086 6087 static int beep_write(char *buf) 6088 { 6089 char *cmd; 6090 int beep_cmd; 6091 6092 if (!beep_handle) 6093 return -ENODEV; 6094 6095 while ((cmd = strsep(&buf, ","))) { 6096 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6097 beep_cmd >= 0 && beep_cmd <= 17) { 6098 /* beep_cmd set */ 6099 } else 6100 return -EINVAL; 6101 if (tp_features.beep_needs_two_args) { 6102 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6103 beep_cmd, 0)) 6104 return -EIO; 6105 } else { 6106 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6107 beep_cmd)) 6108 return -EIO; 6109 } 6110 } 6111 6112 return 0; 6113 } 6114 6115 static struct ibm_struct beep_driver_data = { 6116 .name = "beep", 6117 .read = beep_read, 6118 .write = beep_write, 6119 }; 6120 6121 /************************************************************************* 6122 * Thermal subdriver 6123 */ 6124 6125 enum thermal_access_mode { 6126 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6127 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6128 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6129 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6130 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6131 }; 6132 6133 enum { /* TPACPI_THERMAL_TPEC_* */ 6134 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6135 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6136 TP_EC_FUNCREV = 0xEF, /* ACPI EC Functional revision */ 6137 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6138 6139 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6140 }; 6141 6142 6143 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6144 struct ibm_thermal_sensors_struct { 6145 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6146 }; 6147 6148 static enum thermal_access_mode thermal_read_mode; 6149 static bool thermal_use_labels; 6150 6151 /* idx is zero-based */ 6152 static int thermal_get_sensor(int idx, s32 *value) 6153 { 6154 int t; 6155 s8 tmp; 6156 char tmpi[5]; 6157 6158 t = TP_EC_THERMAL_TMP0; 6159 6160 switch (thermal_read_mode) { 6161 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6162 case TPACPI_THERMAL_TPEC_16: 6163 if (idx >= 8 && idx <= 15) { 6164 t = TP_EC_THERMAL_TMP8; 6165 idx -= 8; 6166 } 6167 #endif 6168 fallthrough; 6169 case TPACPI_THERMAL_TPEC_8: 6170 if (idx <= 7) { 6171 if (!acpi_ec_read(t + idx, &tmp)) 6172 return -EIO; 6173 *value = tmp * 1000; 6174 return 0; 6175 } 6176 break; 6177 6178 case TPACPI_THERMAL_ACPI_UPDT: 6179 if (idx <= 7) { 6180 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6181 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6182 return -EIO; 6183 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6184 return -EIO; 6185 *value = (t - 2732) * 100; 6186 return 0; 6187 } 6188 break; 6189 6190 case TPACPI_THERMAL_ACPI_TMP07: 6191 if (idx <= 7) { 6192 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6193 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6194 return -EIO; 6195 if (t > 127 || t < -127) 6196 t = TP_EC_THERMAL_TMP_NA; 6197 *value = t * 1000; 6198 return 0; 6199 } 6200 break; 6201 6202 case TPACPI_THERMAL_NONE: 6203 default: 6204 return -ENOSYS; 6205 } 6206 6207 return -EINVAL; 6208 } 6209 6210 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6211 { 6212 int res, i; 6213 int n; 6214 6215 n = 8; 6216 i = 0; 6217 6218 if (!s) 6219 return -EINVAL; 6220 6221 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6222 n = 16; 6223 6224 for (i = 0 ; i < n; i++) { 6225 res = thermal_get_sensor(i, &s->temp[i]); 6226 if (res) 6227 return res; 6228 } 6229 6230 return n; 6231 } 6232 6233 static void thermal_dump_all_sensors(void) 6234 { 6235 int n, i; 6236 struct ibm_thermal_sensors_struct t; 6237 6238 n = thermal_get_sensors(&t); 6239 if (n <= 0) 6240 return; 6241 6242 pr_notice("temperatures (Celsius):"); 6243 6244 for (i = 0; i < n; i++) { 6245 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6246 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6247 else 6248 pr_cont(" N/A"); 6249 } 6250 6251 pr_cont("\n"); 6252 } 6253 6254 /* sysfs temp##_input -------------------------------------------------- */ 6255 6256 static ssize_t thermal_temp_input_show(struct device *dev, 6257 struct device_attribute *attr, 6258 char *buf) 6259 { 6260 struct sensor_device_attribute *sensor_attr = 6261 to_sensor_dev_attr(attr); 6262 int idx = sensor_attr->index; 6263 s32 value; 6264 int res; 6265 6266 res = thermal_get_sensor(idx, &value); 6267 if (res) 6268 return res; 6269 if (value == TPACPI_THERMAL_SENSOR_NA) 6270 return -ENXIO; 6271 6272 return sysfs_emit(buf, "%d\n", value); 6273 } 6274 6275 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6276 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6277 thermal_temp_input_show, NULL, _idxB) 6278 6279 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6280 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6281 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6282 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6283 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6284 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6285 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6286 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6287 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6288 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6289 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6290 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6291 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6292 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6293 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6294 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6295 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6296 }; 6297 6298 #define THERMAL_ATTRS(X) \ 6299 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6300 6301 static struct attribute *thermal_temp_input_attr[] = { 6302 THERMAL_ATTRS(0), 6303 THERMAL_ATTRS(1), 6304 THERMAL_ATTRS(2), 6305 THERMAL_ATTRS(3), 6306 THERMAL_ATTRS(4), 6307 THERMAL_ATTRS(5), 6308 THERMAL_ATTRS(6), 6309 THERMAL_ATTRS(7), 6310 THERMAL_ATTRS(8), 6311 THERMAL_ATTRS(9), 6312 THERMAL_ATTRS(10), 6313 THERMAL_ATTRS(11), 6314 THERMAL_ATTRS(12), 6315 THERMAL_ATTRS(13), 6316 THERMAL_ATTRS(14), 6317 THERMAL_ATTRS(15), 6318 NULL 6319 }; 6320 6321 static umode_t thermal_attr_is_visible(struct kobject *kobj, 6322 struct attribute *attr, int n) 6323 { 6324 if (thermal_read_mode == TPACPI_THERMAL_NONE) 6325 return 0; 6326 6327 if (attr == THERMAL_ATTRS(8) || attr == THERMAL_ATTRS(9) || 6328 attr == THERMAL_ATTRS(10) || attr == THERMAL_ATTRS(11) || 6329 attr == THERMAL_ATTRS(12) || attr == THERMAL_ATTRS(13) || 6330 attr == THERMAL_ATTRS(14) || attr == THERMAL_ATTRS(15)) { 6331 if (thermal_read_mode != TPACPI_THERMAL_TPEC_16) 6332 return 0; 6333 } 6334 6335 return attr->mode; 6336 } 6337 6338 static const struct attribute_group thermal_attr_group = { 6339 .is_visible = thermal_attr_is_visible, 6340 .attrs = thermal_temp_input_attr, 6341 }; 6342 6343 #undef THERMAL_SENSOR_ATTR_TEMP 6344 #undef THERMAL_ATTRS 6345 6346 static ssize_t temp1_label_show(struct device *dev, struct device_attribute *attr, char *buf) 6347 { 6348 return sysfs_emit(buf, "CPU\n"); 6349 } 6350 static DEVICE_ATTR_RO(temp1_label); 6351 6352 static ssize_t temp2_label_show(struct device *dev, struct device_attribute *attr, char *buf) 6353 { 6354 return sysfs_emit(buf, "GPU\n"); 6355 } 6356 static DEVICE_ATTR_RO(temp2_label); 6357 6358 static struct attribute *temp_label_attributes[] = { 6359 &dev_attr_temp1_label.attr, 6360 &dev_attr_temp2_label.attr, 6361 NULL 6362 }; 6363 6364 static umode_t temp_label_attr_is_visible(struct kobject *kobj, 6365 struct attribute *attr, int n) 6366 { 6367 return thermal_use_labels ? attr->mode : 0; 6368 } 6369 6370 static const struct attribute_group temp_label_attr_group = { 6371 .is_visible = temp_label_attr_is_visible, 6372 .attrs = temp_label_attributes, 6373 }; 6374 6375 /* --------------------------------------------------------------------- */ 6376 6377 static int __init thermal_init(struct ibm_init_struct *iibm) 6378 { 6379 u8 t, ta1, ta2, ver = 0; 6380 int i; 6381 int acpi_tmp7; 6382 6383 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6384 6385 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6386 6387 if (thinkpad_id.ec_model) { 6388 /* 6389 * Direct EC access mode: sensors at registers 6390 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6391 * non-implemented, thermal sensors return 0x80 when 6392 * not available 6393 * The above rule is unfortunately flawed. This has been seen with 6394 * 0xC2 (power supply ID) causing thermal control problems. 6395 * The EC version can be determined by offset 0xEF and at least for 6396 * version 3 the Lenovo firmware team confirmed that registers 0xC0-0xC7 6397 * are not thermal registers. 6398 */ 6399 if (!acpi_ec_read(TP_EC_FUNCREV, &ver)) 6400 pr_warn("Thinkpad ACPI EC unable to access EC version\n"); 6401 6402 ta1 = ta2 = 0; 6403 for (i = 0; i < 8; i++) { 6404 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6405 ta1 |= t; 6406 } else { 6407 ta1 = 0; 6408 break; 6409 } 6410 if (ver < 3) { 6411 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6412 ta2 |= t; 6413 } else { 6414 ta1 = 0; 6415 break; 6416 } 6417 } 6418 } 6419 if (ta1 == 0) { 6420 /* This is sheer paranoia, but we handle it anyway */ 6421 if (acpi_tmp7) { 6422 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n"); 6423 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6424 } else { 6425 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n"); 6426 thermal_read_mode = TPACPI_THERMAL_NONE; 6427 } 6428 } else { 6429 if (ver >= 3) { 6430 thermal_read_mode = TPACPI_THERMAL_TPEC_8; 6431 thermal_use_labels = true; 6432 } else { 6433 thermal_read_mode = 6434 (ta2 != 0) ? 6435 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6436 } 6437 } 6438 } else if (acpi_tmp7) { 6439 if (tpacpi_is_ibm() && 6440 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6441 /* 600e/x, 770e, 770x */ 6442 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6443 } else { 6444 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6445 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6446 } 6447 } else { 6448 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6449 thermal_read_mode = TPACPI_THERMAL_NONE; 6450 } 6451 6452 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6453 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6454 thermal_read_mode); 6455 6456 return thermal_read_mode != TPACPI_THERMAL_NONE ? 0 : -ENODEV; 6457 } 6458 6459 static int thermal_read(struct seq_file *m) 6460 { 6461 int n, i; 6462 struct ibm_thermal_sensors_struct t; 6463 6464 n = thermal_get_sensors(&t); 6465 if (unlikely(n < 0)) 6466 return n; 6467 6468 seq_printf(m, "temperatures:\t"); 6469 6470 if (n > 0) { 6471 for (i = 0; i < (n - 1); i++) 6472 seq_printf(m, "%d ", t.temp[i] / 1000); 6473 seq_printf(m, "%d\n", t.temp[i] / 1000); 6474 } else 6475 seq_printf(m, "not supported\n"); 6476 6477 return 0; 6478 } 6479 6480 static struct ibm_struct thermal_driver_data = { 6481 .name = "thermal", 6482 .read = thermal_read, 6483 }; 6484 6485 /************************************************************************* 6486 * Backlight/brightness subdriver 6487 */ 6488 6489 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6490 6491 /* 6492 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6493 * CMOS NVRAM byte 0x5E, bits 0-3. 6494 * 6495 * EC HBRV (0x31) has the following layout 6496 * Bit 7: unknown function 6497 * Bit 6: unknown function 6498 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6499 * Bit 4: must be set to zero to avoid problems 6500 * Bit 3-0: backlight brightness level 6501 * 6502 * brightness_get_raw returns status data in the HBRV layout 6503 * 6504 * WARNING: The X61 has been verified to use HBRV for something else, so 6505 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6506 * testing on the very early *60 Lenovo models... 6507 */ 6508 6509 enum { 6510 TP_EC_BACKLIGHT = 0x31, 6511 6512 /* TP_EC_BACKLIGHT bitmasks */ 6513 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6514 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6515 TP_EC_BACKLIGHT_MAPSW = 0x20, 6516 }; 6517 6518 enum tpacpi_brightness_access_mode { 6519 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6520 TPACPI_BRGHT_MODE_EC, /* EC control */ 6521 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6522 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6523 TPACPI_BRGHT_MODE_MAX 6524 }; 6525 6526 static struct backlight_device *ibm_backlight_device; 6527 6528 static enum tpacpi_brightness_access_mode brightness_mode = 6529 TPACPI_BRGHT_MODE_MAX; 6530 6531 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6532 6533 static struct mutex brightness_mutex; 6534 6535 /* NVRAM brightness access */ 6536 static unsigned int tpacpi_brightness_nvram_get(void) 6537 { 6538 u8 lnvram; 6539 6540 lockdep_assert_held(&brightness_mutex); 6541 6542 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6543 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6544 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6545 lnvram &= bright_maxlvl; 6546 6547 return lnvram; 6548 } 6549 6550 static void tpacpi_brightness_checkpoint_nvram(void) 6551 { 6552 u8 lec = 0; 6553 u8 b_nvram; 6554 6555 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6556 return; 6557 6558 vdbg_printk(TPACPI_DBG_BRGHT, 6559 "trying to checkpoint backlight level to NVRAM...\n"); 6560 6561 if (mutex_lock_killable(&brightness_mutex) < 0) 6562 return; 6563 6564 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6565 goto unlock; 6566 lec &= TP_EC_BACKLIGHT_LVLMSK; 6567 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6568 6569 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6570 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6571 /* NVRAM needs update */ 6572 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6573 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6574 b_nvram |= lec; 6575 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6576 dbg_printk(TPACPI_DBG_BRGHT, 6577 "updated NVRAM backlight level to %u (0x%02x)\n", 6578 (unsigned int) lec, (unsigned int) b_nvram); 6579 } else 6580 vdbg_printk(TPACPI_DBG_BRGHT, 6581 "NVRAM backlight level already is %u (0x%02x)\n", 6582 (unsigned int) lec, (unsigned int) b_nvram); 6583 6584 unlock: 6585 mutex_unlock(&brightness_mutex); 6586 } 6587 6588 6589 static int tpacpi_brightness_get_raw(int *status) 6590 { 6591 u8 lec = 0; 6592 6593 lockdep_assert_held(&brightness_mutex); 6594 6595 switch (brightness_mode) { 6596 case TPACPI_BRGHT_MODE_UCMS_STEP: 6597 *status = tpacpi_brightness_nvram_get(); 6598 return 0; 6599 case TPACPI_BRGHT_MODE_EC: 6600 case TPACPI_BRGHT_MODE_ECNVRAM: 6601 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6602 return -EIO; 6603 *status = lec; 6604 return 0; 6605 default: 6606 return -ENXIO; 6607 } 6608 } 6609 6610 /* do NOT call with illegal backlight level value */ 6611 static int tpacpi_brightness_set_ec(unsigned int value) 6612 { 6613 u8 lec = 0; 6614 6615 lockdep_assert_held(&brightness_mutex); 6616 6617 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6618 return -EIO; 6619 6620 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6621 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6622 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6623 return -EIO; 6624 6625 return 0; 6626 } 6627 6628 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6629 { 6630 int cmos_cmd, inc; 6631 unsigned int current_value, i; 6632 6633 lockdep_assert_held(&brightness_mutex); 6634 6635 current_value = tpacpi_brightness_nvram_get(); 6636 6637 if (value == current_value) 6638 return 0; 6639 6640 cmos_cmd = (value > current_value) ? 6641 TP_CMOS_BRIGHTNESS_UP : 6642 TP_CMOS_BRIGHTNESS_DOWN; 6643 inc = (value > current_value) ? 1 : -1; 6644 6645 for (i = current_value; i != value; i += inc) 6646 if (issue_thinkpad_cmos_command(cmos_cmd)) 6647 return -EIO; 6648 6649 return 0; 6650 } 6651 6652 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6653 static int brightness_set(unsigned int value) 6654 { 6655 int res; 6656 6657 if (value > bright_maxlvl) 6658 return -EINVAL; 6659 6660 vdbg_printk(TPACPI_DBG_BRGHT, 6661 "set backlight level to %d\n", value); 6662 6663 res = mutex_lock_killable(&brightness_mutex); 6664 if (res < 0) 6665 return res; 6666 6667 switch (brightness_mode) { 6668 case TPACPI_BRGHT_MODE_EC: 6669 case TPACPI_BRGHT_MODE_ECNVRAM: 6670 res = tpacpi_brightness_set_ec(value); 6671 break; 6672 case TPACPI_BRGHT_MODE_UCMS_STEP: 6673 res = tpacpi_brightness_set_ucmsstep(value); 6674 break; 6675 default: 6676 res = -ENXIO; 6677 } 6678 6679 mutex_unlock(&brightness_mutex); 6680 return res; 6681 } 6682 6683 /* sysfs backlight class ----------------------------------------------- */ 6684 6685 static int brightness_update_status(struct backlight_device *bd) 6686 { 6687 int level = backlight_get_brightness(bd); 6688 6689 dbg_printk(TPACPI_DBG_BRGHT, 6690 "backlight: attempt to set level to %d\n", 6691 level); 6692 6693 /* it is the backlight class's job (caller) to handle 6694 * EINTR and other errors properly */ 6695 return brightness_set(level); 6696 } 6697 6698 static int brightness_get(struct backlight_device *bd) 6699 { 6700 int status, res; 6701 6702 res = mutex_lock_killable(&brightness_mutex); 6703 if (res < 0) 6704 return 0; 6705 6706 res = tpacpi_brightness_get_raw(&status); 6707 6708 mutex_unlock(&brightness_mutex); 6709 6710 if (res < 0) 6711 return 0; 6712 6713 return status & TP_EC_BACKLIGHT_LVLMSK; 6714 } 6715 6716 static void tpacpi_brightness_notify_change(void) 6717 { 6718 backlight_force_update(ibm_backlight_device, 6719 BACKLIGHT_UPDATE_HOTKEY); 6720 } 6721 6722 static const struct backlight_ops ibm_backlight_data = { 6723 .get_brightness = brightness_get, 6724 .update_status = brightness_update_status, 6725 }; 6726 6727 /* --------------------------------------------------------------------- */ 6728 6729 static int __init tpacpi_evaluate_bcl(struct acpi_device *adev, void *not_used) 6730 { 6731 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6732 union acpi_object *obj; 6733 acpi_status status; 6734 int rc; 6735 6736 status = acpi_evaluate_object(adev->handle, "_BCL", NULL, &buffer); 6737 if (ACPI_FAILURE(status)) 6738 return 0; 6739 6740 obj = buffer.pointer; 6741 if (!obj || obj->type != ACPI_TYPE_PACKAGE) { 6742 acpi_handle_info(adev->handle, 6743 "Unknown _BCL data, please report this to %s\n", 6744 TPACPI_MAIL); 6745 rc = 0; 6746 } else { 6747 rc = obj->package.count; 6748 } 6749 kfree(obj); 6750 6751 return rc; 6752 } 6753 6754 /* 6755 * Call _BCL method of video device. On some ThinkPads this will 6756 * switch the firmware to the ACPI brightness control mode. 6757 */ 6758 6759 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6760 { 6761 struct acpi_device *device; 6762 6763 device = acpi_fetch_acpi_dev(handle); 6764 if (!device) 6765 return 0; 6766 6767 return acpi_dev_for_each_child(device, tpacpi_evaluate_bcl, NULL); 6768 } 6769 6770 6771 /* 6772 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6773 */ 6774 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6775 { 6776 acpi_handle video_device; 6777 int bcl_levels = 0; 6778 6779 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6780 if (video_device) 6781 bcl_levels = tpacpi_query_bcl_levels(video_device); 6782 6783 tp_features.bright_acpimode = (bcl_levels > 0); 6784 6785 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6786 } 6787 6788 /* 6789 * These are only useful for models that have only one possibility 6790 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6791 * these quirks. 6792 */ 6793 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6794 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6795 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6796 6797 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6798 /* Models with ATI GPUs known to require ECNVRAM mode */ 6799 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6800 6801 /* Models with ATI GPUs that can use ECNVRAM */ 6802 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6803 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6804 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6805 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6806 6807 /* Models with Intel Extreme Graphics 2 */ 6808 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6809 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6810 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6811 6812 /* Models with Intel GMA900 */ 6813 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6814 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6815 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6816 }; 6817 6818 /* 6819 * Returns < 0 for error, otherwise sets tp_features.bright_* 6820 * and bright_maxlvl. 6821 */ 6822 static void __init tpacpi_detect_brightness_capabilities(void) 6823 { 6824 unsigned int b; 6825 6826 vdbg_printk(TPACPI_DBG_INIT, 6827 "detecting firmware brightness interface capabilities\n"); 6828 6829 /* we could run a quirks check here (same table used by 6830 * brightness_init) if needed */ 6831 6832 /* 6833 * We always attempt to detect acpi support, so as to switch 6834 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6835 * going to publish a backlight interface 6836 */ 6837 b = tpacpi_check_std_acpi_brightness_support(); 6838 switch (b) { 6839 case 16: 6840 bright_maxlvl = 15; 6841 break; 6842 case 8: 6843 case 0: 6844 bright_maxlvl = 7; 6845 break; 6846 default: 6847 tp_features.bright_unkfw = 1; 6848 bright_maxlvl = b - 1; 6849 } 6850 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6851 } 6852 6853 static int __init brightness_init(struct ibm_init_struct *iibm) 6854 { 6855 struct backlight_properties props; 6856 int b; 6857 unsigned long quirks; 6858 6859 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6860 6861 mutex_init(&brightness_mutex); 6862 6863 quirks = tpacpi_check_quirks(brightness_quirk_table, 6864 ARRAY_SIZE(brightness_quirk_table)); 6865 6866 /* tpacpi_detect_brightness_capabilities() must have run already */ 6867 6868 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6869 if (tp_features.bright_unkfw) 6870 return -ENODEV; 6871 6872 if (!brightness_enable) { 6873 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6874 "brightness support disabled by module parameter\n"); 6875 return -ENODEV; 6876 } 6877 6878 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6879 if (brightness_enable > 1) { 6880 pr_info("Standard ACPI backlight interface available, not loading native one\n"); 6881 return -ENODEV; 6882 } else if (brightness_enable == 1) { 6883 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n"); 6884 return -ENODEV; 6885 } 6886 } else if (!tp_features.bright_acpimode) { 6887 pr_notice("ACPI backlight interface not available\n"); 6888 return -ENODEV; 6889 } 6890 6891 pr_notice("ACPI native brightness control enabled\n"); 6892 6893 /* 6894 * Check for module parameter bogosity, note that we 6895 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6896 * able to detect "unspecified" 6897 */ 6898 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6899 return -EINVAL; 6900 6901 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6902 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6903 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6904 if (quirks & TPACPI_BRGHT_Q_EC) 6905 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6906 else 6907 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6908 6909 dbg_printk(TPACPI_DBG_BRGHT, 6910 "driver auto-selected brightness_mode=%d\n", 6911 brightness_mode); 6912 } 6913 6914 /* Safety */ 6915 if (!tpacpi_is_ibm() && 6916 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6917 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6918 return -EINVAL; 6919 6920 if (tpacpi_brightness_get_raw(&b) < 0) 6921 return -ENODEV; 6922 6923 memset(&props, 0, sizeof(struct backlight_properties)); 6924 props.type = BACKLIGHT_PLATFORM; 6925 props.max_brightness = bright_maxlvl; 6926 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6927 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6928 NULL, NULL, 6929 &ibm_backlight_data, 6930 &props); 6931 if (IS_ERR(ibm_backlight_device)) { 6932 int rc = PTR_ERR(ibm_backlight_device); 6933 ibm_backlight_device = NULL; 6934 pr_err("Could not register backlight device\n"); 6935 return rc; 6936 } 6937 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6938 "brightness is supported\n"); 6939 6940 if (quirks & TPACPI_BRGHT_Q_ASK) { 6941 pr_notice("brightness: will use unverified default: brightness_mode=%d\n", 6942 brightness_mode); 6943 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n", 6944 TPACPI_MAIL); 6945 } 6946 6947 /* Added by mistake in early 2007. Probably useless, but it could 6948 * be working around some unknown firmware problem where the value 6949 * read at startup doesn't match the real hardware state... so leave 6950 * it in place just in case */ 6951 backlight_update_status(ibm_backlight_device); 6952 6953 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6954 "brightness: registering brightness hotkeys as change notification\n"); 6955 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6956 | TP_ACPI_HKEY_BRGHTUP_MASK 6957 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6958 return 0; 6959 } 6960 6961 static void brightness_suspend(void) 6962 { 6963 tpacpi_brightness_checkpoint_nvram(); 6964 } 6965 6966 static void brightness_shutdown(void) 6967 { 6968 tpacpi_brightness_checkpoint_nvram(); 6969 } 6970 6971 static void brightness_exit(void) 6972 { 6973 if (ibm_backlight_device) { 6974 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6975 "calling backlight_device_unregister()\n"); 6976 backlight_device_unregister(ibm_backlight_device); 6977 } 6978 6979 tpacpi_brightness_checkpoint_nvram(); 6980 } 6981 6982 static int brightness_read(struct seq_file *m) 6983 { 6984 int level; 6985 6986 level = brightness_get(NULL); 6987 if (level < 0) { 6988 seq_printf(m, "level:\t\tunreadable\n"); 6989 } else { 6990 seq_printf(m, "level:\t\t%d\n", level); 6991 seq_printf(m, "commands:\tup, down\n"); 6992 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6993 bright_maxlvl); 6994 } 6995 6996 return 0; 6997 } 6998 6999 static int brightness_write(char *buf) 7000 { 7001 int level; 7002 int rc; 7003 char *cmd; 7004 7005 level = brightness_get(NULL); 7006 if (level < 0) 7007 return level; 7008 7009 while ((cmd = strsep(&buf, ","))) { 7010 if (strstarts(cmd, "up")) { 7011 if (level < bright_maxlvl) 7012 level++; 7013 } else if (strstarts(cmd, "down")) { 7014 if (level > 0) 7015 level--; 7016 } else if (sscanf(cmd, "level %d", &level) == 1 && 7017 level >= 0 && level <= bright_maxlvl) { 7018 /* new level set */ 7019 } else 7020 return -EINVAL; 7021 } 7022 7023 tpacpi_disclose_usertask("procfs brightness", 7024 "set level to %d\n", level); 7025 7026 /* 7027 * Now we know what the final level should be, so we try to set it. 7028 * Doing it this way makes the syscall restartable in case of EINTR 7029 */ 7030 rc = brightness_set(level); 7031 if (!rc && ibm_backlight_device) 7032 backlight_force_update(ibm_backlight_device, 7033 BACKLIGHT_UPDATE_SYSFS); 7034 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7035 } 7036 7037 static struct ibm_struct brightness_driver_data = { 7038 .name = "brightness", 7039 .read = brightness_read, 7040 .write = brightness_write, 7041 .exit = brightness_exit, 7042 .suspend = brightness_suspend, 7043 .shutdown = brightness_shutdown, 7044 }; 7045 7046 /************************************************************************* 7047 * Volume subdriver 7048 */ 7049 7050 /* 7051 * IBM ThinkPads have a simple volume controller with MUTE gating. 7052 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 7053 * 7054 * Since the *61 series (and probably also the later *60 series), Lenovo 7055 * ThinkPads only implement the MUTE gate. 7056 * 7057 * EC register 0x30 7058 * Bit 6: MUTE (1 mutes sound) 7059 * Bit 3-0: Volume 7060 * Other bits should be zero as far as we know. 7061 * 7062 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 7063 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 7064 * such as bit 7 which is used to detect repeated presses of MUTE, 7065 * and we leave them unchanged. 7066 * 7067 * On newer Lenovo ThinkPads, the EC can automatically change the volume 7068 * in response to user input. Unfortunately, this rarely works well. 7069 * The laptop changes the state of its internal MUTE gate and, on some 7070 * models, sends KEY_MUTE, causing any user code that responds to the 7071 * mute button to get confused. The hardware MUTE gate is also 7072 * unnecessary, since user code can handle the mute button without 7073 * kernel or EC help. 7074 * 7075 * To avoid confusing userspace, we simply disable all EC-based mute 7076 * and volume controls when possible. 7077 */ 7078 7079 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 7080 7081 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 7082 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 7083 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7084 7085 #if SNDRV_CARDS <= 32 7086 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7087 #else 7088 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7089 #endif 7090 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7091 static char *alsa_id = "ThinkPadEC"; 7092 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7093 7094 struct tpacpi_alsa_data { 7095 struct snd_card *card; 7096 struct snd_ctl_elem_id *ctl_mute_id; 7097 struct snd_ctl_elem_id *ctl_vol_id; 7098 }; 7099 7100 static struct snd_card *alsa_card; 7101 7102 enum { 7103 TP_EC_AUDIO = 0x30, 7104 7105 /* TP_EC_AUDIO bits */ 7106 TP_EC_AUDIO_MUTESW = 6, 7107 7108 /* TP_EC_AUDIO bitmasks */ 7109 TP_EC_AUDIO_LVL_MSK = 0x0F, 7110 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7111 7112 /* Maximum volume */ 7113 TP_EC_VOLUME_MAX = 14, 7114 }; 7115 7116 enum tpacpi_volume_access_mode { 7117 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7118 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7119 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7120 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7121 TPACPI_VOL_MODE_MAX 7122 }; 7123 7124 enum tpacpi_volume_capabilities { 7125 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7126 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7127 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7128 TPACPI_VOL_CAP_MAX 7129 }; 7130 7131 enum tpacpi_mute_btn_mode { 7132 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7133 /* We don't know what mode 1 is. */ 7134 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7135 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7136 }; 7137 7138 static enum tpacpi_volume_access_mode volume_mode = 7139 TPACPI_VOL_MODE_MAX; 7140 7141 static enum tpacpi_volume_capabilities volume_capabilities; 7142 static bool volume_control_allowed; 7143 static bool software_mute_requested = true; 7144 static bool software_mute_active; 7145 static int software_mute_orig_mode; 7146 7147 /* 7148 * Used to syncronize writers to TP_EC_AUDIO and 7149 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7150 */ 7151 static struct mutex volume_mutex; 7152 7153 static void tpacpi_volume_checkpoint_nvram(void) 7154 { 7155 u8 lec = 0; 7156 u8 b_nvram; 7157 u8 ec_mask; 7158 7159 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7160 return; 7161 if (!volume_control_allowed) 7162 return; 7163 if (software_mute_active) 7164 return; 7165 7166 vdbg_printk(TPACPI_DBG_MIXER, 7167 "trying to checkpoint mixer state to NVRAM...\n"); 7168 7169 if (tp_features.mixer_no_level_control) 7170 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7171 else 7172 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7173 7174 if (mutex_lock_killable(&volume_mutex) < 0) 7175 return; 7176 7177 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7178 goto unlock; 7179 lec &= ec_mask; 7180 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7181 7182 if (lec != (b_nvram & ec_mask)) { 7183 /* NVRAM needs update */ 7184 b_nvram &= ~ec_mask; 7185 b_nvram |= lec; 7186 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7187 dbg_printk(TPACPI_DBG_MIXER, 7188 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7189 (unsigned int) lec, (unsigned int) b_nvram); 7190 } else { 7191 vdbg_printk(TPACPI_DBG_MIXER, 7192 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7193 (unsigned int) lec, (unsigned int) b_nvram); 7194 } 7195 7196 unlock: 7197 mutex_unlock(&volume_mutex); 7198 } 7199 7200 static int volume_get_status_ec(u8 *status) 7201 { 7202 u8 s; 7203 7204 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7205 return -EIO; 7206 7207 *status = s; 7208 7209 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7210 7211 return 0; 7212 } 7213 7214 static int volume_get_status(u8 *status) 7215 { 7216 return volume_get_status_ec(status); 7217 } 7218 7219 static int volume_set_status_ec(const u8 status) 7220 { 7221 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7222 return -EIO; 7223 7224 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7225 7226 /* 7227 * On X200s, and possibly on others, it can take a while for 7228 * reads to become correct. 7229 */ 7230 msleep(1); 7231 7232 return 0; 7233 } 7234 7235 static int volume_set_status(const u8 status) 7236 { 7237 return volume_set_status_ec(status); 7238 } 7239 7240 /* returns < 0 on error, 0 on no change, 1 on change */ 7241 static int __volume_set_mute_ec(const bool mute) 7242 { 7243 int rc; 7244 u8 s, n; 7245 7246 if (mutex_lock_killable(&volume_mutex) < 0) 7247 return -EINTR; 7248 7249 rc = volume_get_status_ec(&s); 7250 if (rc) 7251 goto unlock; 7252 7253 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7254 s & ~TP_EC_AUDIO_MUTESW_MSK; 7255 7256 if (n != s) { 7257 rc = volume_set_status_ec(n); 7258 if (!rc) 7259 rc = 1; 7260 } 7261 7262 unlock: 7263 mutex_unlock(&volume_mutex); 7264 return rc; 7265 } 7266 7267 static int volume_alsa_set_mute(const bool mute) 7268 { 7269 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7270 (mute) ? "" : "un"); 7271 return __volume_set_mute_ec(mute); 7272 } 7273 7274 static int volume_set_mute(const bool mute) 7275 { 7276 int rc; 7277 7278 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7279 (mute) ? "" : "un"); 7280 7281 rc = __volume_set_mute_ec(mute); 7282 return (rc < 0) ? rc : 0; 7283 } 7284 7285 /* returns < 0 on error, 0 on no change, 1 on change */ 7286 static int __volume_set_volume_ec(const u8 vol) 7287 { 7288 int rc; 7289 u8 s, n; 7290 7291 if (vol > TP_EC_VOLUME_MAX) 7292 return -EINVAL; 7293 7294 if (mutex_lock_killable(&volume_mutex) < 0) 7295 return -EINTR; 7296 7297 rc = volume_get_status_ec(&s); 7298 if (rc) 7299 goto unlock; 7300 7301 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7302 7303 if (n != s) { 7304 rc = volume_set_status_ec(n); 7305 if (!rc) 7306 rc = 1; 7307 } 7308 7309 unlock: 7310 mutex_unlock(&volume_mutex); 7311 return rc; 7312 } 7313 7314 static int volume_set_software_mute(bool startup) 7315 { 7316 int result; 7317 7318 if (!tpacpi_is_lenovo()) 7319 return -ENODEV; 7320 7321 if (startup) { 7322 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7323 "HAUM", "qd")) 7324 return -EIO; 7325 7326 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7327 "Initial HAUM setting was %d\n", 7328 software_mute_orig_mode); 7329 } 7330 7331 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7332 (int)TP_EC_MUTE_BTN_NONE)) 7333 return -EIO; 7334 7335 if (result != TP_EC_MUTE_BTN_NONE) 7336 pr_warn("Unexpected SAUM result %d\n", 7337 result); 7338 7339 /* 7340 * In software mute mode, the standard codec controls take 7341 * precendence, so we unmute the ThinkPad HW switch at 7342 * startup. Just on case there are SAUM-capable ThinkPads 7343 * with level controls, set max HW volume as well. 7344 */ 7345 if (tp_features.mixer_no_level_control) 7346 result = volume_set_mute(false); 7347 else 7348 result = volume_set_status(TP_EC_VOLUME_MAX); 7349 7350 if (result != 0) 7351 pr_warn("Failed to unmute the HW mute switch\n"); 7352 7353 return 0; 7354 } 7355 7356 static void volume_exit_software_mute(void) 7357 { 7358 int r; 7359 7360 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7361 || r != software_mute_orig_mode) 7362 pr_warn("Failed to restore mute mode\n"); 7363 } 7364 7365 static int volume_alsa_set_volume(const u8 vol) 7366 { 7367 dbg_printk(TPACPI_DBG_MIXER, 7368 "ALSA: trying to set volume level to %hu\n", vol); 7369 return __volume_set_volume_ec(vol); 7370 } 7371 7372 static void volume_alsa_notify_change(void) 7373 { 7374 struct tpacpi_alsa_data *d; 7375 7376 if (alsa_card && alsa_card->private_data) { 7377 d = alsa_card->private_data; 7378 if (d->ctl_mute_id) 7379 snd_ctl_notify(alsa_card, 7380 SNDRV_CTL_EVENT_MASK_VALUE, 7381 d->ctl_mute_id); 7382 if (d->ctl_vol_id) 7383 snd_ctl_notify(alsa_card, 7384 SNDRV_CTL_EVENT_MASK_VALUE, 7385 d->ctl_vol_id); 7386 } 7387 } 7388 7389 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7390 struct snd_ctl_elem_info *uinfo) 7391 { 7392 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7393 uinfo->count = 1; 7394 uinfo->value.integer.min = 0; 7395 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7396 return 0; 7397 } 7398 7399 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7400 struct snd_ctl_elem_value *ucontrol) 7401 { 7402 u8 s; 7403 int rc; 7404 7405 rc = volume_get_status(&s); 7406 if (rc < 0) 7407 return rc; 7408 7409 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7410 return 0; 7411 } 7412 7413 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7414 struct snd_ctl_elem_value *ucontrol) 7415 { 7416 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7417 ucontrol->value.integer.value[0]); 7418 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7419 } 7420 7421 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7422 7423 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7424 struct snd_ctl_elem_value *ucontrol) 7425 { 7426 u8 s; 7427 int rc; 7428 7429 rc = volume_get_status(&s); 7430 if (rc < 0) 7431 return rc; 7432 7433 ucontrol->value.integer.value[0] = 7434 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7435 return 0; 7436 } 7437 7438 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7439 struct snd_ctl_elem_value *ucontrol) 7440 { 7441 tpacpi_disclose_usertask("ALSA", "%smute\n", 7442 ucontrol->value.integer.value[0] ? 7443 "un" : ""); 7444 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7445 } 7446 7447 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7448 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7449 .name = "Console Playback Volume", 7450 .index = 0, 7451 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7452 .info = volume_alsa_vol_info, 7453 .get = volume_alsa_vol_get, 7454 }; 7455 7456 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7457 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7458 .name = "Console Playback Switch", 7459 .index = 0, 7460 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7461 .info = volume_alsa_mute_info, 7462 .get = volume_alsa_mute_get, 7463 }; 7464 7465 static void volume_suspend(void) 7466 { 7467 tpacpi_volume_checkpoint_nvram(); 7468 } 7469 7470 static void volume_resume(void) 7471 { 7472 if (software_mute_active) { 7473 if (volume_set_software_mute(false) < 0) 7474 pr_warn("Failed to restore software mute\n"); 7475 } else { 7476 volume_alsa_notify_change(); 7477 } 7478 } 7479 7480 static void volume_shutdown(void) 7481 { 7482 tpacpi_volume_checkpoint_nvram(); 7483 } 7484 7485 static void volume_exit(void) 7486 { 7487 if (alsa_card) { 7488 snd_card_free(alsa_card); 7489 alsa_card = NULL; 7490 } 7491 7492 tpacpi_volume_checkpoint_nvram(); 7493 7494 if (software_mute_active) 7495 volume_exit_software_mute(); 7496 } 7497 7498 static int __init volume_create_alsa_mixer(void) 7499 { 7500 struct snd_card *card; 7501 struct tpacpi_alsa_data *data; 7502 struct snd_kcontrol *ctl_vol; 7503 struct snd_kcontrol *ctl_mute; 7504 int rc; 7505 7506 rc = snd_card_new(&tpacpi_pdev->dev, 7507 alsa_index, alsa_id, THIS_MODULE, 7508 sizeof(struct tpacpi_alsa_data), &card); 7509 if (rc < 0 || !card) { 7510 pr_err("Failed to create ALSA card structures: %d\n", rc); 7511 return -ENODEV; 7512 } 7513 7514 BUG_ON(!card->private_data); 7515 data = card->private_data; 7516 data->card = card; 7517 7518 strscpy(card->driver, TPACPI_ALSA_DRVNAME, 7519 sizeof(card->driver)); 7520 strscpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7521 sizeof(card->shortname)); 7522 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7523 (thinkpad_id.ec_version_str) ? 7524 thinkpad_id.ec_version_str : "(unknown)"); 7525 snprintf(card->longname, sizeof(card->longname), 7526 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7527 (thinkpad_id.ec_version_str) ? 7528 thinkpad_id.ec_version_str : "unknown"); 7529 7530 if (volume_control_allowed) { 7531 volume_alsa_control_vol.put = volume_alsa_vol_put; 7532 volume_alsa_control_vol.access = 7533 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7534 7535 volume_alsa_control_mute.put = volume_alsa_mute_put; 7536 volume_alsa_control_mute.access = 7537 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7538 } 7539 7540 if (!tp_features.mixer_no_level_control) { 7541 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7542 rc = snd_ctl_add(card, ctl_vol); 7543 if (rc < 0) { 7544 pr_err("Failed to create ALSA volume control: %d\n", 7545 rc); 7546 goto err_exit; 7547 } 7548 data->ctl_vol_id = &ctl_vol->id; 7549 } 7550 7551 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7552 rc = snd_ctl_add(card, ctl_mute); 7553 if (rc < 0) { 7554 pr_err("Failed to create ALSA mute control: %d\n", rc); 7555 goto err_exit; 7556 } 7557 data->ctl_mute_id = &ctl_mute->id; 7558 7559 rc = snd_card_register(card); 7560 if (rc < 0) { 7561 pr_err("Failed to register ALSA card: %d\n", rc); 7562 goto err_exit; 7563 } 7564 7565 alsa_card = card; 7566 return 0; 7567 7568 err_exit: 7569 snd_card_free(card); 7570 return -ENODEV; 7571 } 7572 7573 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7574 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7575 7576 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7577 /* Whitelist volume level on all IBM by default */ 7578 { .vendor = PCI_VENDOR_ID_IBM, 7579 .bios = TPACPI_MATCH_ANY, 7580 .ec = TPACPI_MATCH_ANY, 7581 .quirks = TPACPI_VOL_Q_LEVEL }, 7582 7583 /* Lenovo models with volume control (needs confirmation) */ 7584 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7585 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7586 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7587 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7588 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7589 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7590 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7591 7592 /* Whitelist mute-only on all Lenovo by default */ 7593 { .vendor = PCI_VENDOR_ID_LENOVO, 7594 .bios = TPACPI_MATCH_ANY, 7595 .ec = TPACPI_MATCH_ANY, 7596 .quirks = TPACPI_VOL_Q_MUTEONLY } 7597 }; 7598 7599 static int __init volume_init(struct ibm_init_struct *iibm) 7600 { 7601 unsigned long quirks; 7602 int rc; 7603 7604 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7605 7606 mutex_init(&volume_mutex); 7607 7608 /* 7609 * Check for module parameter bogosity, note that we 7610 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7611 * able to detect "unspecified" 7612 */ 7613 if (volume_mode > TPACPI_VOL_MODE_MAX) 7614 return -EINVAL; 7615 7616 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7617 pr_err("UCMS step volume mode not implemented, please contact %s\n", 7618 TPACPI_MAIL); 7619 return -ENODEV; 7620 } 7621 7622 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7623 return -EINVAL; 7624 7625 /* 7626 * The ALSA mixer is our primary interface. 7627 * When disabled, don't install the subdriver at all 7628 */ 7629 if (!alsa_enable) { 7630 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7631 "ALSA mixer disabled by parameter, not loading volume subdriver...\n"); 7632 return -ENODEV; 7633 } 7634 7635 quirks = tpacpi_check_quirks(volume_quirk_table, 7636 ARRAY_SIZE(volume_quirk_table)); 7637 7638 switch (volume_capabilities) { 7639 case TPACPI_VOL_CAP_AUTO: 7640 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7641 tp_features.mixer_no_level_control = 1; 7642 else if (quirks & TPACPI_VOL_Q_LEVEL) 7643 tp_features.mixer_no_level_control = 0; 7644 else 7645 return -ENODEV; /* no mixer */ 7646 break; 7647 case TPACPI_VOL_CAP_VOLMUTE: 7648 tp_features.mixer_no_level_control = 0; 7649 break; 7650 case TPACPI_VOL_CAP_MUTEONLY: 7651 tp_features.mixer_no_level_control = 1; 7652 break; 7653 default: 7654 return -ENODEV; 7655 } 7656 7657 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7658 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7659 "using user-supplied volume_capabilities=%d\n", 7660 volume_capabilities); 7661 7662 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7663 volume_mode == TPACPI_VOL_MODE_MAX) { 7664 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7665 7666 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7667 "driver auto-selected volume_mode=%d\n", 7668 volume_mode); 7669 } else { 7670 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7671 "using user-supplied volume_mode=%d\n", 7672 volume_mode); 7673 } 7674 7675 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7676 "mute is supported, volume control is %s\n", 7677 str_supported(!tp_features.mixer_no_level_control)); 7678 7679 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7680 software_mute_active = true; 7681 } else { 7682 rc = volume_create_alsa_mixer(); 7683 if (rc) { 7684 pr_err("Could not create the ALSA mixer interface\n"); 7685 return rc; 7686 } 7687 7688 pr_info("Console audio control enabled, mode: %s\n", 7689 (volume_control_allowed) ? 7690 "override (read/write)" : 7691 "monitor (read only)"); 7692 } 7693 7694 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7695 "registering volume hotkeys as change notification\n"); 7696 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7697 | TP_ACPI_HKEY_VOLUP_MASK 7698 | TP_ACPI_HKEY_VOLDWN_MASK 7699 | TP_ACPI_HKEY_MUTE_MASK); 7700 7701 return 0; 7702 } 7703 7704 static int volume_read(struct seq_file *m) 7705 { 7706 u8 status; 7707 7708 if (volume_get_status(&status) < 0) { 7709 seq_printf(m, "level:\t\tunreadable\n"); 7710 } else { 7711 if (tp_features.mixer_no_level_control) 7712 seq_printf(m, "level:\t\tunsupported\n"); 7713 else 7714 seq_printf(m, "level:\t\t%d\n", 7715 status & TP_EC_AUDIO_LVL_MSK); 7716 7717 seq_printf(m, "mute:\t\t%s\n", str_on_off(status & BIT(TP_EC_AUDIO_MUTESW))); 7718 7719 if (volume_control_allowed) { 7720 seq_printf(m, "commands:\tunmute, mute\n"); 7721 if (!tp_features.mixer_no_level_control) { 7722 seq_printf(m, "commands:\tup, down\n"); 7723 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7724 TP_EC_VOLUME_MAX); 7725 } 7726 } 7727 } 7728 7729 return 0; 7730 } 7731 7732 static int volume_write(char *buf) 7733 { 7734 u8 s; 7735 u8 new_level, new_mute; 7736 int l; 7737 char *cmd; 7738 int rc; 7739 7740 /* 7741 * We do allow volume control at driver startup, so that the 7742 * user can set initial state through the volume=... parameter hack. 7743 */ 7744 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7745 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7746 tp_warned.volume_ctrl_forbidden = 1; 7747 pr_notice("Console audio control in monitor mode, changes are not allowed\n"); 7748 pr_notice("Use the volume_control=1 module parameter to enable volume control\n"); 7749 } 7750 return -EPERM; 7751 } 7752 7753 rc = volume_get_status(&s); 7754 if (rc < 0) 7755 return rc; 7756 7757 new_level = s & TP_EC_AUDIO_LVL_MSK; 7758 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7759 7760 while ((cmd = strsep(&buf, ","))) { 7761 if (!tp_features.mixer_no_level_control) { 7762 if (strstarts(cmd, "up")) { 7763 if (new_mute) 7764 new_mute = 0; 7765 else if (new_level < TP_EC_VOLUME_MAX) 7766 new_level++; 7767 continue; 7768 } else if (strstarts(cmd, "down")) { 7769 if (new_mute) 7770 new_mute = 0; 7771 else if (new_level > 0) 7772 new_level--; 7773 continue; 7774 } else if (sscanf(cmd, "level %u", &l) == 1 && 7775 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7776 new_level = l; 7777 continue; 7778 } 7779 } 7780 if (strstarts(cmd, "mute")) 7781 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7782 else if (strstarts(cmd, "unmute")) 7783 new_mute = 0; 7784 else 7785 return -EINVAL; 7786 } 7787 7788 if (tp_features.mixer_no_level_control) { 7789 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7790 new_mute ? "" : "un"); 7791 rc = volume_set_mute(!!new_mute); 7792 } else { 7793 tpacpi_disclose_usertask("procfs volume", 7794 "%smute and set level to %d\n", 7795 new_mute ? "" : "un", new_level); 7796 rc = volume_set_status(new_mute | new_level); 7797 } 7798 volume_alsa_notify_change(); 7799 7800 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7801 } 7802 7803 static struct ibm_struct volume_driver_data = { 7804 .name = "volume", 7805 .read = volume_read, 7806 .write = volume_write, 7807 .exit = volume_exit, 7808 .suspend = volume_suspend, 7809 .resume = volume_resume, 7810 .shutdown = volume_shutdown, 7811 }; 7812 7813 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7814 7815 #define alsa_card NULL 7816 7817 static inline void volume_alsa_notify_change(void) 7818 { 7819 } 7820 7821 static int __init volume_init(struct ibm_init_struct *iibm) 7822 { 7823 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7824 7825 return -ENODEV; 7826 } 7827 7828 static struct ibm_struct volume_driver_data = { 7829 .name = "volume", 7830 }; 7831 7832 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7833 7834 /************************************************************************* 7835 * Fan subdriver 7836 */ 7837 7838 /* 7839 * FAN ACCESS MODES 7840 * 7841 * TPACPI_FAN_RD_ACPI_GFAN: 7842 * ACPI GFAN method: returns fan level 7843 * 7844 * see TPACPI_FAN_WR_ACPI_SFAN 7845 * EC 0x2f (HFSP) not available if GFAN exists 7846 * 7847 * TPACPI_FAN_WR_ACPI_SFAN: 7848 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7849 * 7850 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7851 * it for writing. 7852 * 7853 * TPACPI_FAN_WR_TPEC: 7854 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7855 * Supported on almost all ThinkPads 7856 * 7857 * Fan speed changes of any sort (including those caused by the 7858 * disengaged mode) are usually done slowly by the firmware as the 7859 * maximum amount of fan duty cycle change per second seems to be 7860 * limited. 7861 * 7862 * Reading is not available if GFAN exists. 7863 * Writing is not available if SFAN exists. 7864 * 7865 * Bits 7866 * 7 automatic mode engaged; 7867 * (default operation mode of the ThinkPad) 7868 * fan level is ignored in this mode. 7869 * 6 full speed mode (takes precedence over bit 7); 7870 * not available on all thinkpads. May disable 7871 * the tachometer while the fan controller ramps up 7872 * the speed (which can take up to a few *minutes*). 7873 * Speeds up fan to 100% duty-cycle, which is far above 7874 * the standard RPM levels. It is not impossible that 7875 * it could cause hardware damage. 7876 * 5-3 unused in some models. Extra bits for fan level 7877 * in others, but still useless as all values above 7878 * 7 map to the same speed as level 7 in these models. 7879 * 2-0 fan level (0..7 usually) 7880 * 0x00 = stop 7881 * 0x07 = max (set when temperatures critical) 7882 * Some ThinkPads may have other levels, see 7883 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7884 * 7885 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7886 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7887 * does so, its initial value is meaningless (0x07). 7888 * 7889 * For firmware bugs, refer to: 7890 * https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7891 * 7892 * ---- 7893 * 7894 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7895 * Main fan tachometer reading (in RPM) 7896 * 7897 * This register is present on all ThinkPads with a new-style EC, and 7898 * it is known not to be present on the A21m/e, and T22, as there is 7899 * something else in offset 0x84 according to the ACPI DSDT. Other 7900 * ThinkPads from this same time period (and earlier) probably lack the 7901 * tachometer as well. 7902 * 7903 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7904 * was never fixed by IBM to report the EC firmware version string 7905 * probably support the tachometer (like the early X models), so 7906 * detecting it is quite hard. We need more data to know for sure. 7907 * 7908 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7909 * might result. 7910 * 7911 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7912 * mode. 7913 * 7914 * For firmware bugs, refer to: 7915 * https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7916 * 7917 * ---- 7918 * 7919 * ThinkPad EC register 0x31 bit 0 (only on select models) 7920 * 7921 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7922 * show the speed of the main fan. When bit 0 of EC register 0x31 7923 * is one, the tachometer registers show the speed of the auxiliary 7924 * fan. 7925 * 7926 * Fan control seems to affect both fans, regardless of the state 7927 * of this bit. 7928 * 7929 * So far, only the firmware for the X60/X61 non-tablet versions 7930 * seem to support this (firmware TP-7M). 7931 * 7932 * TPACPI_FAN_WR_ACPI_FANS: 7933 * ThinkPad X31, X40, X41. Not available in the X60. 7934 * 7935 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7936 * high speed. ACPI DSDT seems to map these three speeds to levels 7937 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7938 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7939 * 7940 * The speeds are stored on handles 7941 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7942 * 7943 * There are three default speed sets, accessible as handles: 7944 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7945 * 7946 * ACPI DSDT switches which set is in use depending on various 7947 * factors. 7948 * 7949 * TPACPI_FAN_WR_TPEC is also available and should be used to 7950 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7951 * but the ACPI tables just mention level 7. 7952 * 7953 * TPACPI_FAN_RD_TPEC_NS: 7954 * This mode is used for a few ThinkPads (L13 Yoga Gen2, X13 Yoga Gen2 etc.) 7955 * that are using non-standard EC locations for reporting fan speeds. 7956 * Currently these platforms only provide fan rpm reporting. 7957 * 7958 */ 7959 7960 #define FAN_RPM_CAL_CONST 491520 /* FAN RPM calculation offset for some non-standard ECFW */ 7961 7962 #define FAN_NS_CTRL_STATUS BIT(2) /* Bit which determines control is enabled or not */ 7963 #define FAN_NS_CTRL BIT(4) /* Bit which determines control is by host or EC */ 7964 7965 enum { /* Fan control constants */ 7966 fan_status_offset = 0x2f, /* EC register 0x2f */ 7967 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7968 * 0x84 must be read before 0x85 */ 7969 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7970 bit 0 selects which fan is active */ 7971 7972 fan_status_offset_ns = 0x93, /* Special status/control offset for non-standard EC Fan1 */ 7973 fan2_status_offset_ns = 0x96, /* Special status/control offset for non-standard EC Fan2 */ 7974 fan_rpm_status_ns = 0x95, /* Special offset for Fan1 RPM status for non-standard EC */ 7975 fan2_rpm_status_ns = 0x98, /* Special offset for Fan2 RPM status for non-standard EC */ 7976 7977 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7978 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7979 7980 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7981 }; 7982 7983 enum fan_status_access_mode { 7984 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7985 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7986 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7987 TPACPI_FAN_RD_TPEC_NS, /* Use non-standard ACPI EC regs (eg: L13 Yoga gen2 etc.) */ 7988 }; 7989 7990 enum fan_control_access_mode { 7991 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7992 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7993 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7994 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7995 }; 7996 7997 enum fan_control_commands { 7998 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7999 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 8000 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 8001 * and also watchdog cmd */ 8002 }; 8003 8004 static bool fan_control_allowed; 8005 8006 static enum fan_status_access_mode fan_status_access_mode; 8007 static enum fan_control_access_mode fan_control_access_mode; 8008 static enum fan_control_commands fan_control_commands; 8009 8010 static u8 fan_control_initial_status; 8011 static u8 fan_control_desired_level; 8012 static u8 fan_control_resume_level; 8013 static int fan_watchdog_maxinterval; 8014 8015 static bool fan_with_ns_addr; 8016 static bool ecfw_with_fan_dec_rpm; 8017 8018 static struct mutex fan_mutex; 8019 8020 static void fan_watchdog_fire(struct work_struct *ignored); 8021 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 8022 8023 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 8024 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 8025 "\\FSPD", /* 600e/x, 770e, 770x */ 8026 ); /* all others */ 8027 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 8028 "JFNS", /* 770x-JL */ 8029 ); /* all others */ 8030 8031 /* 8032 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 8033 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 8034 * be in auto mode (0x80). 8035 * 8036 * This is corrected by any write to HFSP either by the driver, or 8037 * by the firmware. 8038 * 8039 * We assume 0x07 really means auto mode while this quirk is active, 8040 * as this is far more likely than the ThinkPad being in level 7, 8041 * which is only used by the firmware during thermal emergencies. 8042 * 8043 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 8044 * TP-70 (T43, R52), which are known to be buggy. 8045 */ 8046 8047 static void fan_quirk1_setup(void) 8048 { 8049 if (fan_control_initial_status == 0x07) { 8050 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n"); 8051 tp_features.fan_ctrl_status_undef = 1; 8052 } 8053 } 8054 8055 static void fan_quirk1_handle(u8 *fan_status) 8056 { 8057 if (unlikely(tp_features.fan_ctrl_status_undef)) { 8058 if (*fan_status != fan_control_initial_status) { 8059 /* something changed the HFSP regisnter since 8060 * driver init time, so it is not undefined 8061 * anymore */ 8062 tp_features.fan_ctrl_status_undef = 0; 8063 } else { 8064 /* Return most likely status. In fact, it 8065 * might be the only possible status */ 8066 *fan_status = TP_EC_FAN_AUTO; 8067 } 8068 } 8069 } 8070 8071 /* Select main fan on X60/X61, NOOP on others */ 8072 static bool fan_select_fan1(void) 8073 { 8074 if (tp_features.second_fan) { 8075 u8 val; 8076 8077 if (ec_read(fan_select_offset, &val) < 0) 8078 return false; 8079 val &= 0xFEU; 8080 if (ec_write(fan_select_offset, val) < 0) 8081 return false; 8082 } 8083 return true; 8084 } 8085 8086 /* Select secondary fan on X60/X61 */ 8087 static bool fan_select_fan2(void) 8088 { 8089 u8 val; 8090 8091 if (!tp_features.second_fan) 8092 return false; 8093 8094 if (ec_read(fan_select_offset, &val) < 0) 8095 return false; 8096 val |= 0x01U; 8097 if (ec_write(fan_select_offset, val) < 0) 8098 return false; 8099 8100 return true; 8101 } 8102 8103 static void fan_update_desired_level(u8 status) 8104 { 8105 lockdep_assert_held(&fan_mutex); 8106 8107 if ((status & 8108 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8109 if (status > 7) 8110 fan_control_desired_level = 7; 8111 else 8112 fan_control_desired_level = status; 8113 } 8114 } 8115 8116 static int fan_get_status(u8 *status) 8117 { 8118 u8 s; 8119 8120 /* TODO: 8121 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8122 8123 switch (fan_status_access_mode) { 8124 case TPACPI_FAN_RD_ACPI_GFAN: { 8125 /* 570, 600e/x, 770e, 770x */ 8126 int res; 8127 8128 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8129 return -EIO; 8130 8131 if (likely(status)) 8132 *status = res & 0x07; 8133 8134 break; 8135 } 8136 case TPACPI_FAN_RD_TPEC: 8137 /* all except 570, 600e/x, 770e, 770x */ 8138 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8139 return -EIO; 8140 8141 if (likely(status)) { 8142 *status = s; 8143 fan_quirk1_handle(status); 8144 } 8145 8146 break; 8147 case TPACPI_FAN_RD_TPEC_NS: 8148 /* Default mode is AUTO which means controlled by EC */ 8149 if (!acpi_ec_read(fan_status_offset_ns, &s)) 8150 return -EIO; 8151 8152 if (status) 8153 *status = s; 8154 8155 break; 8156 8157 default: 8158 return -ENXIO; 8159 } 8160 8161 return 0; 8162 } 8163 8164 static int fan_get_status_safe(u8 *status) 8165 { 8166 int rc; 8167 u8 s; 8168 8169 if (mutex_lock_killable(&fan_mutex)) 8170 return -ERESTARTSYS; 8171 rc = fan_get_status(&s); 8172 /* NS EC doesn't have register with level settings */ 8173 if (!rc && !fan_with_ns_addr) 8174 fan_update_desired_level(s); 8175 mutex_unlock(&fan_mutex); 8176 8177 if (rc) 8178 return rc; 8179 if (status) 8180 *status = s; 8181 8182 return 0; 8183 } 8184 8185 static int fan_get_speed(unsigned int *speed) 8186 { 8187 u8 hi, lo; 8188 8189 switch (fan_status_access_mode) { 8190 case TPACPI_FAN_RD_TPEC: 8191 /* all except 570, 600e/x, 770e, 770x */ 8192 if (unlikely(!fan_select_fan1())) 8193 return -EIO; 8194 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8195 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8196 return -EIO; 8197 8198 if (likely(speed)) 8199 *speed = (hi << 8) | lo; 8200 break; 8201 case TPACPI_FAN_RD_TPEC_NS: 8202 if (!acpi_ec_read(fan_rpm_status_ns, &lo)) 8203 return -EIO; 8204 8205 if (speed) 8206 *speed = lo ? FAN_RPM_CAL_CONST / lo : 0; 8207 break; 8208 8209 default: 8210 return -ENXIO; 8211 } 8212 8213 return 0; 8214 } 8215 8216 static int fan2_get_speed(unsigned int *speed) 8217 { 8218 u8 hi, lo, status; 8219 bool rc; 8220 8221 switch (fan_status_access_mode) { 8222 case TPACPI_FAN_RD_TPEC: 8223 /* all except 570, 600e/x, 770e, 770x */ 8224 if (unlikely(!fan_select_fan2())) 8225 return -EIO; 8226 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8227 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8228 fan_select_fan1(); /* play it safe */ 8229 if (rc) 8230 return -EIO; 8231 8232 if (likely(speed)) 8233 *speed = (hi << 8) | lo; 8234 break; 8235 8236 case TPACPI_FAN_RD_TPEC_NS: 8237 rc = !acpi_ec_read(fan2_status_offset_ns, &status); 8238 if (rc) 8239 return -EIO; 8240 if (!(status & FAN_NS_CTRL_STATUS)) { 8241 pr_info("secondary fan control not supported\n"); 8242 return -EIO; 8243 } 8244 rc = !acpi_ec_read(fan2_rpm_status_ns, &lo); 8245 if (rc) 8246 return -EIO; 8247 if (speed) 8248 *speed = lo ? FAN_RPM_CAL_CONST / lo : 0; 8249 break; 8250 8251 default: 8252 return -ENXIO; 8253 } 8254 8255 return 0; 8256 } 8257 8258 static int fan_set_level(int level) 8259 { 8260 if (!fan_control_allowed) 8261 return -EPERM; 8262 8263 switch (fan_control_access_mode) { 8264 case TPACPI_FAN_WR_ACPI_SFAN: 8265 if ((level < 0) || (level > 7)) 8266 return -EINVAL; 8267 8268 if (tp_features.second_fan_ctl) { 8269 if (!fan_select_fan2() || 8270 !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) { 8271 pr_warn("Couldn't set 2nd fan level, disabling support\n"); 8272 tp_features.second_fan_ctl = 0; 8273 } 8274 fan_select_fan1(); 8275 } 8276 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8277 return -EIO; 8278 break; 8279 8280 case TPACPI_FAN_WR_ACPI_FANS: 8281 case TPACPI_FAN_WR_TPEC: 8282 if (!(level & TP_EC_FAN_AUTO) && 8283 !(level & TP_EC_FAN_FULLSPEED) && 8284 ((level < 0) || (level > 7))) 8285 return -EINVAL; 8286 8287 /* safety net should the EC not support AUTO 8288 * or FULLSPEED mode bits and just ignore them */ 8289 if (level & TP_EC_FAN_FULLSPEED) 8290 level |= 7; /* safety min speed 7 */ 8291 else if (level & TP_EC_FAN_AUTO) 8292 level |= 4; /* safety min speed 4 */ 8293 8294 if (tp_features.second_fan_ctl) { 8295 if (!fan_select_fan2() || 8296 !acpi_ec_write(fan_status_offset, level)) { 8297 pr_warn("Couldn't set 2nd fan level, disabling support\n"); 8298 tp_features.second_fan_ctl = 0; 8299 } 8300 fan_select_fan1(); 8301 8302 } 8303 if (!acpi_ec_write(fan_status_offset, level)) 8304 return -EIO; 8305 else 8306 tp_features.fan_ctrl_status_undef = 0; 8307 break; 8308 8309 default: 8310 return -ENXIO; 8311 } 8312 8313 vdbg_printk(TPACPI_DBG_FAN, 8314 "fan control: set fan control register to 0x%02x\n", level); 8315 return 0; 8316 } 8317 8318 static int fan_set_level_safe(int level) 8319 { 8320 int rc; 8321 8322 if (!fan_control_allowed) 8323 return -EPERM; 8324 8325 if (mutex_lock_killable(&fan_mutex)) 8326 return -ERESTARTSYS; 8327 8328 if (level == TPACPI_FAN_LAST_LEVEL) 8329 level = fan_control_desired_level; 8330 8331 rc = fan_set_level(level); 8332 if (!rc) 8333 fan_update_desired_level(level); 8334 8335 mutex_unlock(&fan_mutex); 8336 return rc; 8337 } 8338 8339 static int fan_set_enable(void) 8340 { 8341 u8 s; 8342 int rc; 8343 8344 if (!fan_control_allowed) 8345 return -EPERM; 8346 8347 if (mutex_lock_killable(&fan_mutex)) 8348 return -ERESTARTSYS; 8349 8350 switch (fan_control_access_mode) { 8351 case TPACPI_FAN_WR_ACPI_FANS: 8352 case TPACPI_FAN_WR_TPEC: 8353 rc = fan_get_status(&s); 8354 if (rc) 8355 break; 8356 8357 /* Don't go out of emergency fan mode */ 8358 if (s != 7) { 8359 s &= 0x07; 8360 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8361 } 8362 8363 if (!acpi_ec_write(fan_status_offset, s)) 8364 rc = -EIO; 8365 else { 8366 tp_features.fan_ctrl_status_undef = 0; 8367 rc = 0; 8368 } 8369 break; 8370 8371 case TPACPI_FAN_WR_ACPI_SFAN: 8372 rc = fan_get_status(&s); 8373 if (rc) 8374 break; 8375 8376 s &= 0x07; 8377 8378 /* Set fan to at least level 4 */ 8379 s |= 4; 8380 8381 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8382 rc = -EIO; 8383 else 8384 rc = 0; 8385 break; 8386 8387 default: 8388 rc = -ENXIO; 8389 } 8390 8391 mutex_unlock(&fan_mutex); 8392 8393 if (!rc) 8394 vdbg_printk(TPACPI_DBG_FAN, 8395 "fan control: set fan control register to 0x%02x\n", 8396 s); 8397 return rc; 8398 } 8399 8400 static int fan_set_disable(void) 8401 { 8402 int rc; 8403 8404 if (!fan_control_allowed) 8405 return -EPERM; 8406 8407 if (mutex_lock_killable(&fan_mutex)) 8408 return -ERESTARTSYS; 8409 8410 rc = 0; 8411 switch (fan_control_access_mode) { 8412 case TPACPI_FAN_WR_ACPI_FANS: 8413 case TPACPI_FAN_WR_TPEC: 8414 if (!acpi_ec_write(fan_status_offset, 0x00)) 8415 rc = -EIO; 8416 else { 8417 fan_control_desired_level = 0; 8418 tp_features.fan_ctrl_status_undef = 0; 8419 } 8420 break; 8421 8422 case TPACPI_FAN_WR_ACPI_SFAN: 8423 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8424 rc = -EIO; 8425 else 8426 fan_control_desired_level = 0; 8427 break; 8428 8429 default: 8430 rc = -ENXIO; 8431 } 8432 8433 if (!rc) 8434 vdbg_printk(TPACPI_DBG_FAN, 8435 "fan control: set fan control register to 0\n"); 8436 8437 mutex_unlock(&fan_mutex); 8438 return rc; 8439 } 8440 8441 static int fan_set_speed(int speed) 8442 { 8443 int rc; 8444 8445 if (!fan_control_allowed) 8446 return -EPERM; 8447 8448 if (mutex_lock_killable(&fan_mutex)) 8449 return -ERESTARTSYS; 8450 8451 rc = 0; 8452 switch (fan_control_access_mode) { 8453 case TPACPI_FAN_WR_ACPI_FANS: 8454 if (speed >= 0 && speed <= 65535) { 8455 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8456 speed, speed, speed)) 8457 rc = -EIO; 8458 } else 8459 rc = -EINVAL; 8460 break; 8461 8462 default: 8463 rc = -ENXIO; 8464 } 8465 8466 mutex_unlock(&fan_mutex); 8467 return rc; 8468 } 8469 8470 static void fan_watchdog_reset(void) 8471 { 8472 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8473 return; 8474 8475 if (fan_watchdog_maxinterval > 0 && 8476 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8477 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8478 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8479 else 8480 cancel_delayed_work(&fan_watchdog_task); 8481 } 8482 8483 static void fan_watchdog_fire(struct work_struct *ignored) 8484 { 8485 int rc; 8486 8487 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8488 return; 8489 8490 pr_notice("fan watchdog: enabling fan\n"); 8491 rc = fan_set_enable(); 8492 if (rc < 0) { 8493 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n", 8494 rc); 8495 /* reschedule for later */ 8496 fan_watchdog_reset(); 8497 } 8498 } 8499 8500 /* 8501 * SYSFS fan layout: hwmon compatible (device) 8502 * 8503 * pwm*_enable: 8504 * 0: "disengaged" mode 8505 * 1: manual mode 8506 * 2: native EC "auto" mode (recommended, hardware default) 8507 * 8508 * pwm*: set speed in manual mode, ignored otherwise. 8509 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8510 * interpolation. 8511 * 8512 * fan*_input: tachometer reading, RPM 8513 * 8514 * 8515 * SYSFS fan layout: extensions 8516 * 8517 * fan_watchdog (driver): 8518 * fan watchdog interval in seconds, 0 disables (default), max 120 8519 */ 8520 8521 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8522 static ssize_t fan_pwm1_enable_show(struct device *dev, 8523 struct device_attribute *attr, 8524 char *buf) 8525 { 8526 int res, mode; 8527 u8 status; 8528 8529 res = fan_get_status_safe(&status); 8530 if (res) 8531 return res; 8532 8533 if (status & TP_EC_FAN_FULLSPEED) { 8534 mode = 0; 8535 } else if (status & TP_EC_FAN_AUTO) { 8536 mode = 2; 8537 } else 8538 mode = 1; 8539 8540 return sysfs_emit(buf, "%d\n", mode); 8541 } 8542 8543 static ssize_t fan_pwm1_enable_store(struct device *dev, 8544 struct device_attribute *attr, 8545 const char *buf, size_t count) 8546 { 8547 unsigned long t; 8548 int res, level; 8549 8550 if (parse_strtoul(buf, 2, &t)) 8551 return -EINVAL; 8552 8553 tpacpi_disclose_usertask("hwmon pwm1_enable", 8554 "set fan mode to %lu\n", t); 8555 8556 switch (t) { 8557 case 0: 8558 level = TP_EC_FAN_FULLSPEED; 8559 break; 8560 case 1: 8561 level = TPACPI_FAN_LAST_LEVEL; 8562 break; 8563 case 2: 8564 level = TP_EC_FAN_AUTO; 8565 break; 8566 case 3: 8567 /* reserved for software-controlled auto mode */ 8568 return -ENOSYS; 8569 default: 8570 return -EINVAL; 8571 } 8572 8573 res = fan_set_level_safe(level); 8574 if (res == -ENXIO) 8575 return -EINVAL; 8576 else if (res < 0) 8577 return res; 8578 8579 fan_watchdog_reset(); 8580 8581 return count; 8582 } 8583 8584 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8585 fan_pwm1_enable_show, fan_pwm1_enable_store); 8586 8587 /* sysfs fan pwm1 ------------------------------------------------------ */ 8588 static ssize_t fan_pwm1_show(struct device *dev, 8589 struct device_attribute *attr, 8590 char *buf) 8591 { 8592 int res; 8593 u8 status; 8594 8595 res = fan_get_status_safe(&status); 8596 if (res) 8597 return res; 8598 8599 if ((status & 8600 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8601 status = fan_control_desired_level; 8602 8603 if (status > 7) 8604 status = 7; 8605 8606 return sysfs_emit(buf, "%u\n", (status * 255) / 7); 8607 } 8608 8609 static ssize_t fan_pwm1_store(struct device *dev, 8610 struct device_attribute *attr, 8611 const char *buf, size_t count) 8612 { 8613 unsigned long s; 8614 int rc; 8615 u8 status, newlevel; 8616 8617 if (parse_strtoul(buf, 255, &s)) 8618 return -EINVAL; 8619 8620 tpacpi_disclose_usertask("hwmon pwm1", 8621 "set fan speed to %lu\n", s); 8622 8623 /* scale down from 0-255 to 0-7 */ 8624 newlevel = (s >> 5) & 0x07; 8625 8626 if (mutex_lock_killable(&fan_mutex)) 8627 return -ERESTARTSYS; 8628 8629 rc = fan_get_status(&status); 8630 if (!rc && (status & 8631 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8632 rc = fan_set_level(newlevel); 8633 if (rc == -ENXIO) 8634 rc = -EINVAL; 8635 else if (!rc) { 8636 fan_update_desired_level(newlevel); 8637 fan_watchdog_reset(); 8638 } 8639 } 8640 8641 mutex_unlock(&fan_mutex); 8642 return (rc) ? rc : count; 8643 } 8644 8645 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8646 8647 /* sysfs fan fan1_input ------------------------------------------------ */ 8648 static ssize_t fan_fan1_input_show(struct device *dev, 8649 struct device_attribute *attr, 8650 char *buf) 8651 { 8652 int res; 8653 unsigned int speed; 8654 8655 res = fan_get_speed(&speed); 8656 if (res < 0) 8657 return res; 8658 8659 /* Check for fan speeds displayed in hexadecimal */ 8660 if (!ecfw_with_fan_dec_rpm) 8661 return sysfs_emit(buf, "%u\n", speed); 8662 else 8663 return sysfs_emit(buf, "%x\n", speed); 8664 } 8665 8666 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8667 8668 /* sysfs fan fan2_input ------------------------------------------------ */ 8669 static ssize_t fan_fan2_input_show(struct device *dev, 8670 struct device_attribute *attr, 8671 char *buf) 8672 { 8673 int res; 8674 unsigned int speed; 8675 8676 res = fan2_get_speed(&speed); 8677 if (res < 0) 8678 return res; 8679 8680 /* Check for fan speeds displayed in hexadecimal */ 8681 if (!ecfw_with_fan_dec_rpm) 8682 return sysfs_emit(buf, "%u\n", speed); 8683 else 8684 return sysfs_emit(buf, "%x\n", speed); 8685 } 8686 8687 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8688 8689 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8690 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf) 8691 { 8692 return sysfs_emit(buf, "%u\n", fan_watchdog_maxinterval); 8693 } 8694 8695 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf, 8696 size_t count) 8697 { 8698 unsigned long t; 8699 8700 if (parse_strtoul(buf, 120, &t)) 8701 return -EINVAL; 8702 8703 if (!fan_control_allowed) 8704 return -EPERM; 8705 8706 fan_watchdog_maxinterval = t; 8707 fan_watchdog_reset(); 8708 8709 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8710 8711 return count; 8712 } 8713 static DRIVER_ATTR_RW(fan_watchdog); 8714 8715 /* --------------------------------------------------------------------- */ 8716 8717 static struct attribute *fan_attributes[] = { 8718 &dev_attr_pwm1_enable.attr, 8719 &dev_attr_pwm1.attr, 8720 &dev_attr_fan1_input.attr, 8721 &dev_attr_fan2_input.attr, 8722 NULL 8723 }; 8724 8725 static umode_t fan_attr_is_visible(struct kobject *kobj, struct attribute *attr, 8726 int n) 8727 { 8728 if (fan_status_access_mode == TPACPI_FAN_NONE && 8729 fan_control_access_mode == TPACPI_FAN_WR_NONE) 8730 return 0; 8731 8732 if (attr == &dev_attr_fan2_input.attr) { 8733 if (!tp_features.second_fan) 8734 return 0; 8735 } 8736 8737 return attr->mode; 8738 } 8739 8740 static const struct attribute_group fan_attr_group = { 8741 .is_visible = fan_attr_is_visible, 8742 .attrs = fan_attributes, 8743 }; 8744 8745 static struct attribute *fan_driver_attributes[] = { 8746 &driver_attr_fan_watchdog.attr, 8747 NULL 8748 }; 8749 8750 static const struct attribute_group fan_driver_attr_group = { 8751 .is_visible = fan_attr_is_visible, 8752 .attrs = fan_driver_attributes, 8753 }; 8754 8755 #define TPACPI_FAN_Q1 0x0001 /* Uninitialized HFSP */ 8756 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8757 #define TPACPI_FAN_2CTL 0x0004 /* selects fan2 control */ 8758 #define TPACPI_FAN_NOFAN 0x0008 /* no fan available */ 8759 #define TPACPI_FAN_NS 0x0010 /* For EC with non-Standard register addresses */ 8760 #define TPACPI_FAN_DECRPM 0x0020 /* For ECFW's with RPM in register as decimal */ 8761 8762 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8763 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1), 8764 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1), 8765 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1), 8766 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1), 8767 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN), 8768 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN), 8769 TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL), /* P70 */ 8770 TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL), /* P50 */ 8771 TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL), /* P71 */ 8772 TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL), /* P51 */ 8773 TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL), /* P52 / P72 */ 8774 TPACPI_Q_LNV3('N', '2', 'N', TPACPI_FAN_2CTL), /* P53 / P73 */ 8775 TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (1st gen) */ 8776 TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (2nd gen) */ 8777 TPACPI_Q_LNV3('N', '3', '0', TPACPI_FAN_2CTL), /* P15 (1st gen) / P15v (1st gen) */ 8778 TPACPI_Q_LNV3('N', '3', '7', TPACPI_FAN_2CTL), /* T15g (2nd gen) */ 8779 TPACPI_Q_LNV3('R', '1', 'F', TPACPI_FAN_NS), /* L13 Yoga Gen 2 */ 8780 TPACPI_Q_LNV3('N', '2', 'U', TPACPI_FAN_NS), /* X13 Yoga Gen 2*/ 8781 TPACPI_Q_LNV3('N', '1', 'O', TPACPI_FAN_NOFAN), /* X1 Tablet (2nd gen) */ 8782 TPACPI_Q_LNV3('R', '0', 'Q', TPACPI_FAN_DECRPM),/* L480 */ 8783 }; 8784 8785 static int __init fan_init(struct ibm_init_struct *iibm) 8786 { 8787 unsigned long quirks; 8788 8789 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8790 "initializing fan subdriver\n"); 8791 8792 mutex_init(&fan_mutex); 8793 fan_status_access_mode = TPACPI_FAN_NONE; 8794 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8795 fan_control_commands = 0; 8796 fan_watchdog_maxinterval = 0; 8797 tp_features.fan_ctrl_status_undef = 0; 8798 tp_features.second_fan = 0; 8799 tp_features.second_fan_ctl = 0; 8800 fan_control_desired_level = 7; 8801 8802 if (tpacpi_is_ibm()) { 8803 TPACPI_ACPIHANDLE_INIT(fans); 8804 TPACPI_ACPIHANDLE_INIT(gfan); 8805 TPACPI_ACPIHANDLE_INIT(sfan); 8806 } 8807 8808 quirks = tpacpi_check_quirks(fan_quirk_table, 8809 ARRAY_SIZE(fan_quirk_table)); 8810 8811 if (quirks & TPACPI_FAN_NOFAN) { 8812 pr_info("No integrated ThinkPad fan available\n"); 8813 return -ENODEV; 8814 } 8815 8816 if (quirks & TPACPI_FAN_NS) { 8817 pr_info("ECFW with non-standard fan reg control found\n"); 8818 fan_with_ns_addr = 1; 8819 /* Fan ctrl support from host is undefined for now */ 8820 tp_features.fan_ctrl_status_undef = 1; 8821 } 8822 8823 /* Check for the EC/BIOS with RPM reported in decimal*/ 8824 if (quirks & TPACPI_FAN_DECRPM) { 8825 pr_info("ECFW with fan RPM as decimal in EC register\n"); 8826 ecfw_with_fan_dec_rpm = 1; 8827 tp_features.fan_ctrl_status_undef = 1; 8828 } 8829 8830 if (gfan_handle) { 8831 /* 570, 600e/x, 770e, 770x */ 8832 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8833 } else { 8834 /* all other ThinkPads: note that even old-style 8835 * ThinkPad ECs supports the fan control register */ 8836 if (fan_with_ns_addr || 8837 likely(acpi_ec_read(fan_status_offset, &fan_control_initial_status))) { 8838 int res; 8839 unsigned int speed; 8840 8841 fan_status_access_mode = fan_with_ns_addr ? 8842 TPACPI_FAN_RD_TPEC_NS : TPACPI_FAN_RD_TPEC; 8843 8844 if (quirks & TPACPI_FAN_Q1) 8845 fan_quirk1_setup(); 8846 /* Try and probe the 2nd fan */ 8847 tp_features.second_fan = 1; /* needed for get_speed to work */ 8848 res = fan2_get_speed(&speed); 8849 if (res >= 0 && speed != FAN_NOT_PRESENT) { 8850 /* It responded - so let's assume it's there */ 8851 tp_features.second_fan = 1; 8852 /* fan control not currently available for ns ECFW */ 8853 tp_features.second_fan_ctl = !fan_with_ns_addr; 8854 pr_info("secondary fan control detected & enabled\n"); 8855 } else { 8856 /* Fan not auto-detected */ 8857 tp_features.second_fan = 0; 8858 if (quirks & TPACPI_FAN_2FAN) { 8859 tp_features.second_fan = 1; 8860 pr_info("secondary fan support enabled\n"); 8861 } 8862 if (quirks & TPACPI_FAN_2CTL) { 8863 tp_features.second_fan = 1; 8864 tp_features.second_fan_ctl = 1; 8865 pr_info("secondary fan control enabled\n"); 8866 } 8867 } 8868 } else { 8869 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n"); 8870 return -ENODEV; 8871 } 8872 } 8873 8874 if (sfan_handle) { 8875 /* 570, 770x-JL */ 8876 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8877 fan_control_commands |= 8878 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8879 } else { 8880 if (!gfan_handle) { 8881 /* gfan without sfan means no fan control */ 8882 /* all other models implement TP EC 0x2f control */ 8883 8884 if (fans_handle) { 8885 /* X31, X40, X41 */ 8886 fan_control_access_mode = 8887 TPACPI_FAN_WR_ACPI_FANS; 8888 fan_control_commands |= 8889 TPACPI_FAN_CMD_SPEED | 8890 TPACPI_FAN_CMD_LEVEL | 8891 TPACPI_FAN_CMD_ENABLE; 8892 } else { 8893 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8894 fan_control_commands |= 8895 TPACPI_FAN_CMD_LEVEL | 8896 TPACPI_FAN_CMD_ENABLE; 8897 } 8898 } 8899 } 8900 8901 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8902 "fan is %s, modes %d, %d\n", 8903 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8904 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8905 fan_status_access_mode, fan_control_access_mode); 8906 8907 /* fan control master switch */ 8908 if (!fan_control_allowed) { 8909 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8910 fan_control_commands = 0; 8911 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8912 "fan control features disabled by parameter\n"); 8913 } 8914 8915 /* update fan_control_desired_level */ 8916 if (fan_status_access_mode != TPACPI_FAN_NONE) 8917 fan_get_status_safe(NULL); 8918 8919 if (fan_status_access_mode == TPACPI_FAN_NONE && 8920 fan_control_access_mode == TPACPI_FAN_WR_NONE) 8921 return -ENODEV; 8922 8923 return 0; 8924 } 8925 8926 static void fan_exit(void) 8927 { 8928 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8929 "cancelling any pending fan watchdog tasks\n"); 8930 8931 cancel_delayed_work(&fan_watchdog_task); 8932 flush_workqueue(tpacpi_wq); 8933 } 8934 8935 static void fan_suspend(void) 8936 { 8937 int rc; 8938 8939 if (!fan_control_allowed) 8940 return; 8941 8942 /* Store fan status in cache */ 8943 fan_control_resume_level = 0; 8944 rc = fan_get_status_safe(&fan_control_resume_level); 8945 if (rc) 8946 pr_notice("failed to read fan level for later restore during resume: %d\n", 8947 rc); 8948 8949 /* if it is undefined, don't attempt to restore it. 8950 * KEEP THIS LAST */ 8951 if (tp_features.fan_ctrl_status_undef) 8952 fan_control_resume_level = 0; 8953 } 8954 8955 static void fan_resume(void) 8956 { 8957 u8 current_level = 7; 8958 bool do_set = false; 8959 int rc; 8960 8961 /* DSDT *always* updates status on resume */ 8962 tp_features.fan_ctrl_status_undef = 0; 8963 8964 if (!fan_control_allowed || 8965 !fan_control_resume_level || 8966 fan_get_status_safe(¤t_level)) 8967 return; 8968 8969 switch (fan_control_access_mode) { 8970 case TPACPI_FAN_WR_ACPI_SFAN: 8971 /* never decrease fan level */ 8972 do_set = (fan_control_resume_level > current_level); 8973 break; 8974 case TPACPI_FAN_WR_ACPI_FANS: 8975 case TPACPI_FAN_WR_TPEC: 8976 /* never decrease fan level, scale is: 8977 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8978 * 8979 * We expect the firmware to set either 7 or AUTO, but we 8980 * handle FULLSPEED out of paranoia. 8981 * 8982 * So, we can safely only restore FULLSPEED or 7, anything 8983 * else could slow the fan. Restoring AUTO is useless, at 8984 * best that's exactly what the DSDT already set (it is the 8985 * slower it uses). 8986 * 8987 * Always keep in mind that the DSDT *will* have set the 8988 * fans to what the vendor supposes is the best level. We 8989 * muck with it only to speed the fan up. 8990 */ 8991 if (fan_control_resume_level != 7 && 8992 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8993 return; 8994 else 8995 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8996 (current_level != fan_control_resume_level); 8997 break; 8998 default: 8999 return; 9000 } 9001 if (do_set) { 9002 pr_notice("restoring fan level to 0x%02x\n", 9003 fan_control_resume_level); 9004 rc = fan_set_level_safe(fan_control_resume_level); 9005 if (rc < 0) 9006 pr_notice("failed to restore fan level: %d\n", rc); 9007 } 9008 } 9009 9010 static int fan_read(struct seq_file *m) 9011 { 9012 int rc; 9013 u8 status; 9014 unsigned int speed = 0; 9015 9016 switch (fan_status_access_mode) { 9017 case TPACPI_FAN_RD_ACPI_GFAN: 9018 /* 570, 600e/x, 770e, 770x */ 9019 rc = fan_get_status_safe(&status); 9020 if (rc) 9021 return rc; 9022 9023 seq_printf(m, "status:\t\t%s\n" 9024 "level:\t\t%d\n", 9025 str_enabled_disabled(status), status); 9026 break; 9027 9028 case TPACPI_FAN_RD_TPEC_NS: 9029 case TPACPI_FAN_RD_TPEC: 9030 /* all except 570, 600e/x, 770e, 770x */ 9031 rc = fan_get_status_safe(&status); 9032 if (rc) 9033 return rc; 9034 9035 seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status)); 9036 9037 rc = fan_get_speed(&speed); 9038 if (rc < 0) 9039 return rc; 9040 9041 /* Check for fan speeds displayed in hexadecimal */ 9042 if (!ecfw_with_fan_dec_rpm) 9043 seq_printf(m, "speed:\t\t%d\n", speed); 9044 else 9045 seq_printf(m, "speed:\t\t%x\n", speed); 9046 9047 if (fan_status_access_mode == TPACPI_FAN_RD_TPEC_NS) { 9048 /* 9049 * No full speed bit in NS EC 9050 * EC Auto mode is set by default. 9051 * No other levels settings available 9052 */ 9053 seq_printf(m, "level:\t\t%s\n", status & FAN_NS_CTRL ? "unknown" : "auto"); 9054 } else { 9055 if (status & TP_EC_FAN_FULLSPEED) 9056 /* Disengaged mode takes precedence */ 9057 seq_printf(m, "level:\t\tdisengaged\n"); 9058 else if (status & TP_EC_FAN_AUTO) 9059 seq_printf(m, "level:\t\tauto\n"); 9060 else 9061 seq_printf(m, "level:\t\t%d\n", status); 9062 } 9063 break; 9064 9065 case TPACPI_FAN_NONE: 9066 default: 9067 seq_printf(m, "status:\t\tnot supported\n"); 9068 } 9069 9070 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 9071 seq_printf(m, "commands:\tlevel <level>"); 9072 9073 switch (fan_control_access_mode) { 9074 case TPACPI_FAN_WR_ACPI_SFAN: 9075 seq_printf(m, " (<level> is 0-7)\n"); 9076 break; 9077 9078 default: 9079 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n"); 9080 break; 9081 } 9082 } 9083 9084 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 9085 seq_printf(m, "commands:\tenable, disable\n" 9086 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n"); 9087 9088 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 9089 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n"); 9090 9091 return 0; 9092 } 9093 9094 static int fan_write_cmd_level(const char *cmd, int *rc) 9095 { 9096 int level; 9097 9098 if (strstarts(cmd, "level auto")) 9099 level = TP_EC_FAN_AUTO; 9100 else if (strstarts(cmd, "level disengaged") || strstarts(cmd, "level full-speed")) 9101 level = TP_EC_FAN_FULLSPEED; 9102 else if (sscanf(cmd, "level %d", &level) != 1) 9103 return 0; 9104 9105 *rc = fan_set_level_safe(level); 9106 if (*rc == -ENXIO) 9107 pr_err("level command accepted for unsupported access mode %d\n", 9108 fan_control_access_mode); 9109 else if (!*rc) 9110 tpacpi_disclose_usertask("procfs fan", 9111 "set level to %d\n", level); 9112 9113 return 1; 9114 } 9115 9116 static int fan_write_cmd_enable(const char *cmd, int *rc) 9117 { 9118 if (!strstarts(cmd, "enable")) 9119 return 0; 9120 9121 *rc = fan_set_enable(); 9122 if (*rc == -ENXIO) 9123 pr_err("enable command accepted for unsupported access mode %d\n", 9124 fan_control_access_mode); 9125 else if (!*rc) 9126 tpacpi_disclose_usertask("procfs fan", "enable\n"); 9127 9128 return 1; 9129 } 9130 9131 static int fan_write_cmd_disable(const char *cmd, int *rc) 9132 { 9133 if (!strstarts(cmd, "disable")) 9134 return 0; 9135 9136 *rc = fan_set_disable(); 9137 if (*rc == -ENXIO) 9138 pr_err("disable command accepted for unsupported access mode %d\n", 9139 fan_control_access_mode); 9140 else if (!*rc) 9141 tpacpi_disclose_usertask("procfs fan", "disable\n"); 9142 9143 return 1; 9144 } 9145 9146 static int fan_write_cmd_speed(const char *cmd, int *rc) 9147 { 9148 int speed; 9149 9150 /* TODO: 9151 * Support speed <low> <medium> <high> ? */ 9152 9153 if (sscanf(cmd, "speed %d", &speed) != 1) 9154 return 0; 9155 9156 *rc = fan_set_speed(speed); 9157 if (*rc == -ENXIO) 9158 pr_err("speed command accepted for unsupported access mode %d\n", 9159 fan_control_access_mode); 9160 else if (!*rc) 9161 tpacpi_disclose_usertask("procfs fan", 9162 "set speed to %d\n", speed); 9163 9164 return 1; 9165 } 9166 9167 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 9168 { 9169 int interval; 9170 9171 if (sscanf(cmd, "watchdog %d", &interval) != 1) 9172 return 0; 9173 9174 if (interval < 0 || interval > 120) 9175 *rc = -EINVAL; 9176 else { 9177 fan_watchdog_maxinterval = interval; 9178 tpacpi_disclose_usertask("procfs fan", 9179 "set watchdog timer to %d\n", 9180 interval); 9181 } 9182 9183 return 1; 9184 } 9185 9186 static int fan_write(char *buf) 9187 { 9188 char *cmd; 9189 int rc = 0; 9190 9191 while (!rc && (cmd = strsep(&buf, ","))) { 9192 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 9193 fan_write_cmd_level(cmd, &rc)) && 9194 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 9195 (fan_write_cmd_enable(cmd, &rc) || 9196 fan_write_cmd_disable(cmd, &rc) || 9197 fan_write_cmd_watchdog(cmd, &rc))) && 9198 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 9199 fan_write_cmd_speed(cmd, &rc)) 9200 ) 9201 rc = -EINVAL; 9202 else if (!rc) 9203 fan_watchdog_reset(); 9204 } 9205 9206 return rc; 9207 } 9208 9209 static struct ibm_struct fan_driver_data = { 9210 .name = "fan", 9211 .read = fan_read, 9212 .write = fan_write, 9213 .exit = fan_exit, 9214 .suspend = fan_suspend, 9215 .resume = fan_resume, 9216 }; 9217 9218 /************************************************************************* 9219 * Mute LED subdriver 9220 */ 9221 9222 #define TPACPI_LED_MAX 2 9223 9224 struct tp_led_table { 9225 acpi_string name; 9226 int on_value; 9227 int off_value; 9228 int state; 9229 }; 9230 9231 static struct tp_led_table led_tables[TPACPI_LED_MAX] = { 9232 [LED_AUDIO_MUTE] = { 9233 .name = "SSMS", 9234 .on_value = 1, 9235 .off_value = 0, 9236 }, 9237 [LED_AUDIO_MICMUTE] = { 9238 .name = "MMTS", 9239 .on_value = 2, 9240 .off_value = 0, 9241 }, 9242 }; 9243 9244 static int mute_led_on_off(struct tp_led_table *t, bool state) 9245 { 9246 acpi_handle temp; 9247 int output; 9248 9249 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9250 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9251 return -EIO; 9252 } 9253 9254 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9255 state ? t->on_value : t->off_value)) 9256 return -EIO; 9257 9258 t->state = state; 9259 return state; 9260 } 9261 9262 static int tpacpi_led_set(int whichled, bool on) 9263 { 9264 struct tp_led_table *t; 9265 9266 t = &led_tables[whichled]; 9267 if (t->state < 0 || t->state == on) 9268 return t->state; 9269 return mute_led_on_off(t, on); 9270 } 9271 9272 static int tpacpi_led_mute_set(struct led_classdev *led_cdev, 9273 enum led_brightness brightness) 9274 { 9275 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF); 9276 } 9277 9278 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev, 9279 enum led_brightness brightness) 9280 { 9281 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF); 9282 } 9283 9284 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = { 9285 [LED_AUDIO_MUTE] = { 9286 .name = "platform::mute", 9287 .max_brightness = 1, 9288 .brightness_set_blocking = tpacpi_led_mute_set, 9289 .default_trigger = "audio-mute", 9290 }, 9291 [LED_AUDIO_MICMUTE] = { 9292 .name = "platform::micmute", 9293 .max_brightness = 1, 9294 .brightness_set_blocking = tpacpi_led_micmute_set, 9295 .default_trigger = "audio-micmute", 9296 }, 9297 }; 9298 9299 static int mute_led_init(struct ibm_init_struct *iibm) 9300 { 9301 acpi_handle temp; 9302 int i, err; 9303 9304 for (i = 0; i < TPACPI_LED_MAX; i++) { 9305 struct tp_led_table *t = &led_tables[i]; 9306 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9307 t->state = -ENODEV; 9308 continue; 9309 } 9310 9311 mute_led_cdev[i].brightness = ledtrig_audio_get(i); 9312 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]); 9313 if (err < 0) { 9314 while (i--) 9315 led_classdev_unregister(&mute_led_cdev[i]); 9316 return err; 9317 } 9318 } 9319 return 0; 9320 } 9321 9322 static void mute_led_exit(void) 9323 { 9324 int i; 9325 9326 for (i = 0; i < TPACPI_LED_MAX; i++) { 9327 led_classdev_unregister(&mute_led_cdev[i]); 9328 tpacpi_led_set(i, false); 9329 } 9330 } 9331 9332 static void mute_led_resume(void) 9333 { 9334 int i; 9335 9336 for (i = 0; i < TPACPI_LED_MAX; i++) { 9337 struct tp_led_table *t = &led_tables[i]; 9338 if (t->state >= 0) 9339 mute_led_on_off(t, t->state); 9340 } 9341 } 9342 9343 static struct ibm_struct mute_led_driver_data = { 9344 .name = "mute_led", 9345 .exit = mute_led_exit, 9346 .resume = mute_led_resume, 9347 }; 9348 9349 /* 9350 * Battery Wear Control Driver 9351 * Contact: Ognjen Galic <smclt30p@gmail.com> 9352 */ 9353 9354 /* Metadata */ 9355 9356 #define GET_START "BCTG" 9357 #define SET_START "BCCS" 9358 #define GET_STOP "BCSG" 9359 #define SET_STOP "BCSS" 9360 #define GET_DISCHARGE "BDSG" 9361 #define SET_DISCHARGE "BDSS" 9362 #define GET_INHIBIT "BICG" 9363 #define SET_INHIBIT "BICS" 9364 9365 enum { 9366 BAT_ANY = 0, 9367 BAT_PRIMARY = 1, 9368 BAT_SECONDARY = 2 9369 }; 9370 9371 enum { 9372 /* Error condition bit */ 9373 METHOD_ERR = BIT(31), 9374 }; 9375 9376 enum { 9377 /* This is used in the get/set helpers */ 9378 THRESHOLD_START, 9379 THRESHOLD_STOP, 9380 FORCE_DISCHARGE, 9381 INHIBIT_CHARGE, 9382 }; 9383 9384 struct tpacpi_battery_data { 9385 int charge_start; 9386 int start_support; 9387 int charge_stop; 9388 int stop_support; 9389 unsigned int charge_behaviours; 9390 }; 9391 9392 struct tpacpi_battery_driver_data { 9393 struct tpacpi_battery_data batteries[3]; 9394 int individual_addressing; 9395 }; 9396 9397 static struct tpacpi_battery_driver_data battery_info; 9398 9399 /* ACPI helpers/functions/probes */ 9400 9401 /** 9402 * This evaluates a ACPI method call specific to the battery 9403 * ACPI extension. The specifics are that an error is marked 9404 * in the 32rd bit of the response, so we just check that here. 9405 */ 9406 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param) 9407 { 9408 int response; 9409 9410 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) { 9411 acpi_handle_err(hkey_handle, "%s: evaluate failed", method); 9412 return AE_ERROR; 9413 } 9414 if (response & METHOD_ERR) { 9415 acpi_handle_err(hkey_handle, 9416 "%s evaluated but flagged as error", method); 9417 return AE_ERROR; 9418 } 9419 *ret = response; 9420 return AE_OK; 9421 } 9422 9423 static int tpacpi_battery_get(int what, int battery, int *ret) 9424 { 9425 switch (what) { 9426 case THRESHOLD_START: 9427 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery)) 9428 return -ENODEV; 9429 9430 /* The value is in the low 8 bits of the response */ 9431 *ret = *ret & 0xFF; 9432 return 0; 9433 case THRESHOLD_STOP: 9434 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery)) 9435 return -ENODEV; 9436 /* Value is in lower 8 bits */ 9437 *ret = *ret & 0xFF; 9438 /* 9439 * On the stop value, if we return 0 that 9440 * does not make any sense. 0 means Default, which 9441 * means that charging stops at 100%, so we return 9442 * that. 9443 */ 9444 if (*ret == 0) 9445 *ret = 100; 9446 return 0; 9447 case FORCE_DISCHARGE: 9448 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, ret, battery)) 9449 return -ENODEV; 9450 /* The force discharge status is in bit 0 */ 9451 *ret = *ret & 0x01; 9452 return 0; 9453 case INHIBIT_CHARGE: 9454 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, ret, battery)) 9455 return -ENODEV; 9456 /* The inhibit charge status is in bit 0 */ 9457 *ret = *ret & 0x01; 9458 return 0; 9459 default: 9460 pr_crit("wrong parameter: %d", what); 9461 return -EINVAL; 9462 } 9463 } 9464 9465 static int tpacpi_battery_set(int what, int battery, int value) 9466 { 9467 int param, ret; 9468 /* The first 8 bits are the value of the threshold */ 9469 param = value; 9470 /* The battery ID is in bits 8-9, 2 bits */ 9471 param |= battery << 8; 9472 9473 switch (what) { 9474 case THRESHOLD_START: 9475 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) { 9476 pr_err("failed to set charge threshold on battery %d", 9477 battery); 9478 return -ENODEV; 9479 } 9480 return 0; 9481 case THRESHOLD_STOP: 9482 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) { 9483 pr_err("failed to set stop threshold: %d", battery); 9484 return -ENODEV; 9485 } 9486 return 0; 9487 case FORCE_DISCHARGE: 9488 /* Force discharge is in bit 0, 9489 * break on AC attach is in bit 1 (won't work on some ThinkPads), 9490 * battery ID is in bits 8-9, 2 bits. 9491 */ 9492 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_DISCHARGE, &ret, param))) { 9493 pr_err("failed to set force discharge on %d", battery); 9494 return -ENODEV; 9495 } 9496 return 0; 9497 case INHIBIT_CHARGE: 9498 /* When setting inhibit charge, we set a default value of 9499 * always breaking on AC detach and the effective time is set to 9500 * be permanent. 9501 * The battery ID is in bits 4-5, 2 bits, 9502 * the effective time is in bits 8-23, 2 bytes. 9503 * A time of FFFF indicates forever. 9504 */ 9505 param = value; 9506 param |= battery << 4; 9507 param |= 0xFFFF << 8; 9508 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_INHIBIT, &ret, param))) { 9509 pr_err("failed to set inhibit charge on %d", battery); 9510 return -ENODEV; 9511 } 9512 return 0; 9513 default: 9514 pr_crit("wrong parameter: %d", what); 9515 return -EINVAL; 9516 } 9517 } 9518 9519 static int tpacpi_battery_set_validate(int what, int battery, int value) 9520 { 9521 int ret, v; 9522 9523 ret = tpacpi_battery_set(what, battery, value); 9524 if (ret < 0) 9525 return ret; 9526 9527 ret = tpacpi_battery_get(what, battery, &v); 9528 if (ret < 0) 9529 return ret; 9530 9531 if (v == value) 9532 return 0; 9533 9534 msleep(500); 9535 9536 ret = tpacpi_battery_get(what, battery, &v); 9537 if (ret < 0) 9538 return ret; 9539 9540 if (v == value) 9541 return 0; 9542 9543 return -EIO; 9544 } 9545 9546 static int tpacpi_battery_probe(int battery) 9547 { 9548 int ret = 0; 9549 9550 memset(&battery_info.batteries[battery], 0, 9551 sizeof(battery_info.batteries[battery])); 9552 9553 /* 9554 * 1) Get the current start threshold 9555 * 2) Check for support 9556 * 3) Get the current stop threshold 9557 * 4) Check for support 9558 * 5) Get the current force discharge status 9559 * 6) Check for support 9560 * 7) Get the current inhibit charge status 9561 * 8) Check for support 9562 */ 9563 if (acpi_has_method(hkey_handle, GET_START)) { 9564 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { 9565 pr_err("Error probing battery %d\n", battery); 9566 return -ENODEV; 9567 } 9568 /* Individual addressing is in bit 9 */ 9569 if (ret & BIT(9)) 9570 battery_info.individual_addressing = true; 9571 /* Support is marked in bit 8 */ 9572 if (ret & BIT(8)) 9573 battery_info.batteries[battery].start_support = 1; 9574 else 9575 return -ENODEV; 9576 if (tpacpi_battery_get(THRESHOLD_START, battery, 9577 &battery_info.batteries[battery].charge_start)) { 9578 pr_err("Error probing battery %d\n", battery); 9579 return -ENODEV; 9580 } 9581 } 9582 if (acpi_has_method(hkey_handle, GET_STOP)) { 9583 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) { 9584 pr_err("Error probing battery stop; %d\n", battery); 9585 return -ENODEV; 9586 } 9587 /* Support is marked in bit 8 */ 9588 if (ret & BIT(8)) 9589 battery_info.batteries[battery].stop_support = 1; 9590 else 9591 return -ENODEV; 9592 if (tpacpi_battery_get(THRESHOLD_STOP, battery, 9593 &battery_info.batteries[battery].charge_stop)) { 9594 pr_err("Error probing battery stop: %d\n", battery); 9595 return -ENODEV; 9596 } 9597 } 9598 if (acpi_has_method(hkey_handle, GET_DISCHARGE)) { 9599 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, &ret, battery))) { 9600 pr_err("Error probing battery discharge; %d\n", battery); 9601 return -ENODEV; 9602 } 9603 /* Support is marked in bit 8 */ 9604 if (ret & BIT(8)) 9605 battery_info.batteries[battery].charge_behaviours |= 9606 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE); 9607 } 9608 if (acpi_has_method(hkey_handle, GET_INHIBIT)) { 9609 if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, &ret, battery))) { 9610 pr_err("Error probing battery inhibit charge; %d\n", battery); 9611 return -ENODEV; 9612 } 9613 /* Support is marked in bit 5 */ 9614 if (ret & BIT(5)) 9615 battery_info.batteries[battery].charge_behaviours |= 9616 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE); 9617 } 9618 9619 battery_info.batteries[battery].charge_behaviours |= 9620 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO); 9621 9622 pr_info("battery %d registered (start %d, stop %d, behaviours: 0x%x)\n", 9623 battery, 9624 battery_info.batteries[battery].charge_start, 9625 battery_info.batteries[battery].charge_stop, 9626 battery_info.batteries[battery].charge_behaviours); 9627 9628 return 0; 9629 } 9630 9631 /* General helper functions */ 9632 9633 static int tpacpi_battery_get_id(const char *battery_name) 9634 { 9635 9636 if (strcmp(battery_name, "BAT0") == 0 || 9637 tp_features.battery_force_primary) 9638 return BAT_PRIMARY; 9639 if (strcmp(battery_name, "BAT1") == 0) 9640 return BAT_SECONDARY; 9641 /* 9642 * If for some reason the battery is not BAT0 nor is it 9643 * BAT1, we will assume it's the default, first battery, 9644 * AKA primary. 9645 */ 9646 pr_warn("unknown battery %s, assuming primary", battery_name); 9647 return BAT_PRIMARY; 9648 } 9649 9650 /* sysfs interface */ 9651 9652 static ssize_t tpacpi_battery_store(int what, 9653 struct device *dev, 9654 const char *buf, size_t count) 9655 { 9656 struct power_supply *supply = to_power_supply(dev); 9657 unsigned long value; 9658 int battery, rval; 9659 /* 9660 * Some systems have support for more than 9661 * one battery. If that is the case, 9662 * tpacpi_battery_probe marked that addressing 9663 * them individually is supported, so we do that 9664 * based on the device struct. 9665 * 9666 * On systems that are not supported, we assume 9667 * the primary as most of the ACPI calls fail 9668 * with "Any Battery" as the parameter. 9669 */ 9670 if (battery_info.individual_addressing) 9671 /* BAT_PRIMARY or BAT_SECONDARY */ 9672 battery = tpacpi_battery_get_id(supply->desc->name); 9673 else 9674 battery = BAT_PRIMARY; 9675 9676 rval = kstrtoul(buf, 10, &value); 9677 if (rval) 9678 return rval; 9679 9680 switch (what) { 9681 case THRESHOLD_START: 9682 if (!battery_info.batteries[battery].start_support) 9683 return -ENODEV; 9684 /* valid values are [0, 99] */ 9685 if (value > 99) 9686 return -EINVAL; 9687 if (value > battery_info.batteries[battery].charge_stop) 9688 return -EINVAL; 9689 if (tpacpi_battery_set(THRESHOLD_START, battery, value)) 9690 return -ENODEV; 9691 battery_info.batteries[battery].charge_start = value; 9692 return count; 9693 9694 case THRESHOLD_STOP: 9695 if (!battery_info.batteries[battery].stop_support) 9696 return -ENODEV; 9697 /* valid values are [1, 100] */ 9698 if (value < 1 || value > 100) 9699 return -EINVAL; 9700 if (value < battery_info.batteries[battery].charge_start) 9701 return -EINVAL; 9702 battery_info.batteries[battery].charge_stop = value; 9703 /* 9704 * When 100 is passed to stop, we need to flip 9705 * it to 0 as that the EC understands that as 9706 * "Default", which will charge to 100% 9707 */ 9708 if (value == 100) 9709 value = 0; 9710 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value)) 9711 return -EINVAL; 9712 return count; 9713 default: 9714 pr_crit("Wrong parameter: %d", what); 9715 return -EINVAL; 9716 } 9717 return count; 9718 } 9719 9720 static ssize_t tpacpi_battery_show(int what, 9721 struct device *dev, 9722 char *buf) 9723 { 9724 struct power_supply *supply = to_power_supply(dev); 9725 int ret, battery; 9726 /* 9727 * Some systems have support for more than 9728 * one battery. If that is the case, 9729 * tpacpi_battery_probe marked that addressing 9730 * them individually is supported, so we; 9731 * based on the device struct. 9732 * 9733 * On systems that are not supported, we assume 9734 * the primary as most of the ACPI calls fail 9735 * with "Any Battery" as the parameter. 9736 */ 9737 if (battery_info.individual_addressing) 9738 /* BAT_PRIMARY or BAT_SECONDARY */ 9739 battery = tpacpi_battery_get_id(supply->desc->name); 9740 else 9741 battery = BAT_PRIMARY; 9742 if (tpacpi_battery_get(what, battery, &ret)) 9743 return -ENODEV; 9744 return sprintf(buf, "%d\n", ret); 9745 } 9746 9747 static ssize_t charge_control_start_threshold_show(struct device *device, 9748 struct device_attribute *attr, 9749 char *buf) 9750 { 9751 return tpacpi_battery_show(THRESHOLD_START, device, buf); 9752 } 9753 9754 static ssize_t charge_control_end_threshold_show(struct device *device, 9755 struct device_attribute *attr, 9756 char *buf) 9757 { 9758 return tpacpi_battery_show(THRESHOLD_STOP, device, buf); 9759 } 9760 9761 static ssize_t charge_behaviour_show(struct device *dev, 9762 struct device_attribute *attr, 9763 char *buf) 9764 { 9765 enum power_supply_charge_behaviour active = POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO; 9766 struct power_supply *supply = to_power_supply(dev); 9767 unsigned int available; 9768 int ret, battery; 9769 9770 battery = tpacpi_battery_get_id(supply->desc->name); 9771 available = battery_info.batteries[battery].charge_behaviours; 9772 9773 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) { 9774 if (tpacpi_battery_get(FORCE_DISCHARGE, battery, &ret)) 9775 return -ENODEV; 9776 if (ret) { 9777 active = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE; 9778 goto out; 9779 } 9780 } 9781 9782 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) { 9783 if (tpacpi_battery_get(INHIBIT_CHARGE, battery, &ret)) 9784 return -ENODEV; 9785 if (ret) { 9786 active = POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE; 9787 goto out; 9788 } 9789 } 9790 9791 out: 9792 return power_supply_charge_behaviour_show(dev, available, active, buf); 9793 } 9794 9795 static ssize_t charge_control_start_threshold_store(struct device *dev, 9796 struct device_attribute *attr, 9797 const char *buf, size_t count) 9798 { 9799 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count); 9800 } 9801 9802 static ssize_t charge_control_end_threshold_store(struct device *dev, 9803 struct device_attribute *attr, 9804 const char *buf, size_t count) 9805 { 9806 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count); 9807 } 9808 9809 static ssize_t charge_behaviour_store(struct device *dev, 9810 struct device_attribute *attr, 9811 const char *buf, size_t count) 9812 { 9813 struct power_supply *supply = to_power_supply(dev); 9814 int selected, battery, ret = 0; 9815 unsigned int available; 9816 9817 battery = tpacpi_battery_get_id(supply->desc->name); 9818 available = battery_info.batteries[battery].charge_behaviours; 9819 selected = power_supply_charge_behaviour_parse(available, buf); 9820 9821 if (selected < 0) 9822 return selected; 9823 9824 switch (selected) { 9825 case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO: 9826 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) 9827 ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0); 9828 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) 9829 ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0)); 9830 if (ret < 0) 9831 return ret; 9832 break; 9833 case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE: 9834 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) 9835 ret = tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0); 9836 ret = min(ret, tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1)); 9837 if (ret < 0) 9838 return ret; 9839 break; 9840 case POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE: 9841 if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) 9842 ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0); 9843 ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 1)); 9844 if (ret < 0) 9845 return ret; 9846 break; 9847 default: 9848 dev_err(dev, "Unexpected charge behaviour: %d\n", selected); 9849 return -EINVAL; 9850 } 9851 9852 return count; 9853 } 9854 9855 static DEVICE_ATTR_RW(charge_control_start_threshold); 9856 static DEVICE_ATTR_RW(charge_control_end_threshold); 9857 static DEVICE_ATTR_RW(charge_behaviour); 9858 static struct device_attribute dev_attr_charge_start_threshold = __ATTR( 9859 charge_start_threshold, 9860 0644, 9861 charge_control_start_threshold_show, 9862 charge_control_start_threshold_store 9863 ); 9864 static struct device_attribute dev_attr_charge_stop_threshold = __ATTR( 9865 charge_stop_threshold, 9866 0644, 9867 charge_control_end_threshold_show, 9868 charge_control_end_threshold_store 9869 ); 9870 9871 static struct attribute *tpacpi_battery_attrs[] = { 9872 &dev_attr_charge_control_start_threshold.attr, 9873 &dev_attr_charge_control_end_threshold.attr, 9874 &dev_attr_charge_start_threshold.attr, 9875 &dev_attr_charge_stop_threshold.attr, 9876 &dev_attr_charge_behaviour.attr, 9877 NULL, 9878 }; 9879 9880 ATTRIBUTE_GROUPS(tpacpi_battery); 9881 9882 /* ACPI battery hooking */ 9883 9884 static int tpacpi_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook) 9885 { 9886 int batteryid = tpacpi_battery_get_id(battery->desc->name); 9887 9888 if (tpacpi_battery_probe(batteryid)) 9889 return -ENODEV; 9890 if (device_add_groups(&battery->dev, tpacpi_battery_groups)) 9891 return -ENODEV; 9892 return 0; 9893 } 9894 9895 static int tpacpi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook) 9896 { 9897 device_remove_groups(&battery->dev, tpacpi_battery_groups); 9898 return 0; 9899 } 9900 9901 static struct acpi_battery_hook battery_hook = { 9902 .add_battery = tpacpi_battery_add, 9903 .remove_battery = tpacpi_battery_remove, 9904 .name = "ThinkPad Battery Extension", 9905 }; 9906 9907 /* Subdriver init/exit */ 9908 9909 static const struct tpacpi_quirk battery_quirk_table[] __initconst = { 9910 /* 9911 * Individual addressing is broken on models that expose the 9912 * primary battery as BAT1. 9913 */ 9914 TPACPI_Q_LNV('8', 'F', true), /* Thinkpad X120e */ 9915 TPACPI_Q_LNV('J', '7', true), /* B5400 */ 9916 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */ 9917 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */ 9918 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */ 9919 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */ 9920 TPACPI_Q_LNV3('R', '0', 'K', true), /* Thinkpad 11e gen 4 celeron BIOS */ 9921 }; 9922 9923 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm) 9924 { 9925 memset(&battery_info, 0, sizeof(battery_info)); 9926 9927 tp_features.battery_force_primary = tpacpi_check_quirks( 9928 battery_quirk_table, 9929 ARRAY_SIZE(battery_quirk_table)); 9930 9931 battery_hook_register(&battery_hook); 9932 return 0; 9933 } 9934 9935 static void tpacpi_battery_exit(void) 9936 { 9937 battery_hook_unregister(&battery_hook); 9938 } 9939 9940 static struct ibm_struct battery_driver_data = { 9941 .name = "battery", 9942 .exit = tpacpi_battery_exit, 9943 }; 9944 9945 /************************************************************************* 9946 * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature 9947 */ 9948 9949 static struct drm_privacy_screen *lcdshadow_dev; 9950 static acpi_handle lcdshadow_get_handle; 9951 static acpi_handle lcdshadow_set_handle; 9952 9953 static int lcdshadow_set_sw_state(struct drm_privacy_screen *priv, 9954 enum drm_privacy_screen_status state) 9955 { 9956 int output; 9957 9958 if (WARN_ON(!mutex_is_locked(&priv->lock))) 9959 return -EIO; 9960 9961 if (!acpi_evalf(lcdshadow_set_handle, &output, NULL, "dd", (int)state)) 9962 return -EIO; 9963 9964 priv->hw_state = priv->sw_state = state; 9965 return 0; 9966 } 9967 9968 static void lcdshadow_get_hw_state(struct drm_privacy_screen *priv) 9969 { 9970 int output; 9971 9972 if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0)) 9973 return; 9974 9975 priv->hw_state = priv->sw_state = output & 0x1; 9976 } 9977 9978 static const struct drm_privacy_screen_ops lcdshadow_ops = { 9979 .set_sw_state = lcdshadow_set_sw_state, 9980 .get_hw_state = lcdshadow_get_hw_state, 9981 }; 9982 9983 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm) 9984 { 9985 acpi_status status1, status2; 9986 int output; 9987 9988 status1 = acpi_get_handle(hkey_handle, "GSSS", &lcdshadow_get_handle); 9989 status2 = acpi_get_handle(hkey_handle, "SSSS", &lcdshadow_set_handle); 9990 if (ACPI_FAILURE(status1) || ACPI_FAILURE(status2)) 9991 return 0; 9992 9993 if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0)) 9994 return -EIO; 9995 9996 if (!(output & 0x10000)) 9997 return 0; 9998 9999 lcdshadow_dev = drm_privacy_screen_register(&tpacpi_pdev->dev, 10000 &lcdshadow_ops, NULL); 10001 if (IS_ERR(lcdshadow_dev)) 10002 return PTR_ERR(lcdshadow_dev); 10003 10004 return 0; 10005 } 10006 10007 static void lcdshadow_exit(void) 10008 { 10009 drm_privacy_screen_unregister(lcdshadow_dev); 10010 } 10011 10012 static void lcdshadow_resume(void) 10013 { 10014 if (!lcdshadow_dev) 10015 return; 10016 10017 mutex_lock(&lcdshadow_dev->lock); 10018 lcdshadow_set_sw_state(lcdshadow_dev, lcdshadow_dev->sw_state); 10019 mutex_unlock(&lcdshadow_dev->lock); 10020 } 10021 10022 static int lcdshadow_read(struct seq_file *m) 10023 { 10024 if (!lcdshadow_dev) { 10025 seq_puts(m, "status:\t\tnot supported\n"); 10026 } else { 10027 seq_printf(m, "status:\t\t%d\n", lcdshadow_dev->hw_state); 10028 seq_puts(m, "commands:\t0, 1\n"); 10029 } 10030 10031 return 0; 10032 } 10033 10034 static int lcdshadow_write(char *buf) 10035 { 10036 char *cmd; 10037 int res, state = -EINVAL; 10038 10039 if (!lcdshadow_dev) 10040 return -ENODEV; 10041 10042 while ((cmd = strsep(&buf, ","))) { 10043 res = kstrtoint(cmd, 10, &state); 10044 if (res < 0) 10045 return res; 10046 } 10047 10048 if (state >= 2 || state < 0) 10049 return -EINVAL; 10050 10051 mutex_lock(&lcdshadow_dev->lock); 10052 res = lcdshadow_set_sw_state(lcdshadow_dev, state); 10053 mutex_unlock(&lcdshadow_dev->lock); 10054 10055 drm_privacy_screen_call_notifier_chain(lcdshadow_dev); 10056 10057 return res; 10058 } 10059 10060 static struct ibm_struct lcdshadow_driver_data = { 10061 .name = "lcdshadow", 10062 .exit = lcdshadow_exit, 10063 .resume = lcdshadow_resume, 10064 .read = lcdshadow_read, 10065 .write = lcdshadow_write, 10066 }; 10067 10068 /************************************************************************* 10069 * Thinkpad sensor interfaces 10070 */ 10071 10072 #define DYTC_CMD_QUERY 0 /* To get DYTC status - enable/revision */ 10073 #define DYTC_QUERY_ENABLE_BIT 8 /* Bit 8 - 0 = disabled, 1 = enabled */ 10074 #define DYTC_QUERY_SUBREV_BIT 16 /* Bits 16 - 27 - sub revision */ 10075 #define DYTC_QUERY_REV_BIT 28 /* Bits 28 - 31 - revision */ 10076 10077 #define DYTC_CMD_GET 2 /* To get current IC function and mode */ 10078 #define DYTC_GET_LAPMODE_BIT 17 /* Set when in lapmode */ 10079 10080 #define PALMSENSOR_PRESENT_BIT 0 /* Determine if psensor present */ 10081 #define PALMSENSOR_ON_BIT 1 /* psensor status */ 10082 10083 static bool has_palmsensor; 10084 static bool has_lapsensor; 10085 static bool palm_state; 10086 static bool lap_state; 10087 static int dytc_version; 10088 10089 static int dytc_command(int command, int *output) 10090 { 10091 acpi_handle dytc_handle; 10092 10093 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DYTC", &dytc_handle))) { 10094 /* Platform doesn't support DYTC */ 10095 return -ENODEV; 10096 } 10097 if (!acpi_evalf(dytc_handle, output, NULL, "dd", command)) 10098 return -EIO; 10099 return 0; 10100 } 10101 10102 static int lapsensor_get(bool *present, bool *state) 10103 { 10104 int output, err; 10105 10106 *present = false; 10107 err = dytc_command(DYTC_CMD_GET, &output); 10108 if (err) 10109 return err; 10110 10111 *present = true; /*If we get his far, we have lapmode support*/ 10112 *state = output & BIT(DYTC_GET_LAPMODE_BIT) ? true : false; 10113 return 0; 10114 } 10115 10116 static int palmsensor_get(bool *present, bool *state) 10117 { 10118 acpi_handle psensor_handle; 10119 int output; 10120 10121 *present = false; 10122 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GPSS", &psensor_handle))) 10123 return -ENODEV; 10124 if (!acpi_evalf(psensor_handle, &output, NULL, "d")) 10125 return -EIO; 10126 10127 *present = output & BIT(PALMSENSOR_PRESENT_BIT) ? true : false; 10128 *state = output & BIT(PALMSENSOR_ON_BIT) ? true : false; 10129 return 0; 10130 } 10131 10132 static void lapsensor_refresh(void) 10133 { 10134 bool state; 10135 int err; 10136 10137 if (has_lapsensor) { 10138 err = lapsensor_get(&has_lapsensor, &state); 10139 if (err) 10140 return; 10141 if (lap_state != state) { 10142 lap_state = state; 10143 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "dytc_lapmode"); 10144 } 10145 } 10146 } 10147 10148 static void palmsensor_refresh(void) 10149 { 10150 bool state; 10151 int err; 10152 10153 if (has_palmsensor) { 10154 err = palmsensor_get(&has_palmsensor, &state); 10155 if (err) 10156 return; 10157 if (palm_state != state) { 10158 palm_state = state; 10159 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "palmsensor"); 10160 } 10161 } 10162 } 10163 10164 static ssize_t dytc_lapmode_show(struct device *dev, 10165 struct device_attribute *attr, 10166 char *buf) 10167 { 10168 if (has_lapsensor) 10169 return sysfs_emit(buf, "%d\n", lap_state); 10170 return sysfs_emit(buf, "\n"); 10171 } 10172 static DEVICE_ATTR_RO(dytc_lapmode); 10173 10174 static ssize_t palmsensor_show(struct device *dev, 10175 struct device_attribute *attr, 10176 char *buf) 10177 { 10178 if (has_palmsensor) 10179 return sysfs_emit(buf, "%d\n", palm_state); 10180 return sysfs_emit(buf, "\n"); 10181 } 10182 static DEVICE_ATTR_RO(palmsensor); 10183 10184 static struct attribute *proxsensor_attributes[] = { 10185 &dev_attr_dytc_lapmode.attr, 10186 &dev_attr_palmsensor.attr, 10187 NULL 10188 }; 10189 10190 static umode_t proxsensor_attr_is_visible(struct kobject *kobj, 10191 struct attribute *attr, int n) 10192 { 10193 if (attr == &dev_attr_dytc_lapmode.attr) { 10194 /* 10195 * Platforms before DYTC version 5 claim to have a lap sensor, 10196 * but it doesn't work, so we ignore them. 10197 */ 10198 if (!has_lapsensor || dytc_version < 5) 10199 return 0; 10200 } else if (attr == &dev_attr_palmsensor.attr) { 10201 if (!has_palmsensor) 10202 return 0; 10203 } 10204 10205 return attr->mode; 10206 } 10207 10208 static const struct attribute_group proxsensor_attr_group = { 10209 .is_visible = proxsensor_attr_is_visible, 10210 .attrs = proxsensor_attributes, 10211 }; 10212 10213 static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm) 10214 { 10215 int palm_err, lap_err; 10216 10217 palm_err = palmsensor_get(&has_palmsensor, &palm_state); 10218 lap_err = lapsensor_get(&has_lapsensor, &lap_state); 10219 /* If support isn't available for both devices return -ENODEV */ 10220 if ((palm_err == -ENODEV) && (lap_err == -ENODEV)) 10221 return -ENODEV; 10222 /* Otherwise, if there was an error return it */ 10223 if (palm_err && (palm_err != -ENODEV)) 10224 return palm_err; 10225 if (lap_err && (lap_err != -ENODEV)) 10226 return lap_err; 10227 10228 return 0; 10229 } 10230 10231 static struct ibm_struct proxsensor_driver_data = { 10232 .name = "proximity-sensor", 10233 }; 10234 10235 /************************************************************************* 10236 * DYTC Platform Profile interface 10237 */ 10238 10239 #define DYTC_CMD_SET 1 /* To enable/disable IC function mode */ 10240 #define DYTC_CMD_MMC_GET 8 /* To get current MMC function and mode */ 10241 #define DYTC_CMD_RESET 0x1ff /* To reset back to default */ 10242 10243 #define DYTC_CMD_FUNC_CAP 3 /* To get DYTC capabilities */ 10244 #define DYTC_FC_MMC 27 /* MMC Mode supported */ 10245 #define DYTC_FC_PSC 29 /* PSC Mode supported */ 10246 #define DYTC_FC_AMT 31 /* AMT mode supported */ 10247 10248 #define DYTC_GET_FUNCTION_BIT 8 /* Bits 8-11 - function setting */ 10249 #define DYTC_GET_MODE_BIT 12 /* Bits 12-15 - mode setting */ 10250 10251 #define DYTC_SET_FUNCTION_BIT 12 /* Bits 12-15 - function setting */ 10252 #define DYTC_SET_MODE_BIT 16 /* Bits 16-19 - mode setting */ 10253 #define DYTC_SET_VALID_BIT 20 /* Bit 20 - 1 = on, 0 = off */ 10254 10255 #define DYTC_FUNCTION_STD 0 /* Function = 0, standard mode */ 10256 #define DYTC_FUNCTION_CQL 1 /* Function = 1, lap mode */ 10257 #define DYTC_FUNCTION_MMC 11 /* Function = 11, MMC mode */ 10258 #define DYTC_FUNCTION_PSC 13 /* Function = 13, PSC mode */ 10259 #define DYTC_FUNCTION_AMT 15 /* Function = 15, AMT mode */ 10260 10261 #define DYTC_MODE_AMT_ENABLE 0x1 /* Enable AMT (in balanced mode) */ 10262 #define DYTC_MODE_AMT_DISABLE 0xF /* Disable AMT (in other modes) */ 10263 10264 #define DYTC_MODE_MMC_PERFORM 2 /* High power mode aka performance */ 10265 #define DYTC_MODE_MMC_LOWPOWER 3 /* Low power mode */ 10266 #define DYTC_MODE_MMC_BALANCE 0xF /* Default mode aka balanced */ 10267 #define DYTC_MODE_MMC_DEFAULT 0 /* Default mode from MMC_GET, aka balanced */ 10268 10269 #define DYTC_MODE_PSC_LOWPOWER 3 /* Low power mode */ 10270 #define DYTC_MODE_PSC_BALANCE 5 /* Default mode aka balanced */ 10271 #define DYTC_MODE_PSC_PERFORM 7 /* High power mode aka performance */ 10272 10273 #define DYTC_ERR_MASK 0xF /* Bits 0-3 in cmd result are the error result */ 10274 #define DYTC_ERR_SUCCESS 1 /* CMD completed successful */ 10275 10276 #define DYTC_SET_COMMAND(function, mode, on) \ 10277 (DYTC_CMD_SET | (function) << DYTC_SET_FUNCTION_BIT | \ 10278 (mode) << DYTC_SET_MODE_BIT | \ 10279 (on) << DYTC_SET_VALID_BIT) 10280 10281 #define DYTC_DISABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 0) 10282 #define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 1) 10283 static int dytc_control_amt(bool enable); 10284 static bool dytc_amt_active; 10285 10286 static enum platform_profile_option dytc_current_profile; 10287 static atomic_t dytc_ignore_event = ATOMIC_INIT(0); 10288 static DEFINE_MUTEX(dytc_mutex); 10289 static int dytc_capabilities; 10290 static bool dytc_mmc_get_available; 10291 static int profile_force; 10292 10293 static int convert_dytc_to_profile(int funcmode, int dytcmode, 10294 enum platform_profile_option *profile) 10295 { 10296 switch (funcmode) { 10297 case DYTC_FUNCTION_MMC: 10298 switch (dytcmode) { 10299 case DYTC_MODE_MMC_LOWPOWER: 10300 *profile = PLATFORM_PROFILE_LOW_POWER; 10301 break; 10302 case DYTC_MODE_MMC_DEFAULT: 10303 case DYTC_MODE_MMC_BALANCE: 10304 *profile = PLATFORM_PROFILE_BALANCED; 10305 break; 10306 case DYTC_MODE_MMC_PERFORM: 10307 *profile = PLATFORM_PROFILE_PERFORMANCE; 10308 break; 10309 default: /* Unknown mode */ 10310 return -EINVAL; 10311 } 10312 return 0; 10313 case DYTC_FUNCTION_PSC: 10314 switch (dytcmode) { 10315 case DYTC_MODE_PSC_LOWPOWER: 10316 *profile = PLATFORM_PROFILE_LOW_POWER; 10317 break; 10318 case DYTC_MODE_PSC_BALANCE: 10319 *profile = PLATFORM_PROFILE_BALANCED; 10320 break; 10321 case DYTC_MODE_PSC_PERFORM: 10322 *profile = PLATFORM_PROFILE_PERFORMANCE; 10323 break; 10324 default: /* Unknown mode */ 10325 return -EINVAL; 10326 } 10327 return 0; 10328 case DYTC_FUNCTION_AMT: 10329 /* For now return balanced. It's the closest we have to 'auto' */ 10330 *profile = PLATFORM_PROFILE_BALANCED; 10331 return 0; 10332 default: 10333 /* Unknown function */ 10334 pr_debug("unknown function 0x%x\n", funcmode); 10335 return -EOPNOTSUPP; 10336 } 10337 return 0; 10338 } 10339 10340 static int convert_profile_to_dytc(enum platform_profile_option profile, int *perfmode) 10341 { 10342 switch (profile) { 10343 case PLATFORM_PROFILE_LOW_POWER: 10344 if (dytc_capabilities & BIT(DYTC_FC_MMC)) 10345 *perfmode = DYTC_MODE_MMC_LOWPOWER; 10346 else if (dytc_capabilities & BIT(DYTC_FC_PSC)) 10347 *perfmode = DYTC_MODE_PSC_LOWPOWER; 10348 break; 10349 case PLATFORM_PROFILE_BALANCED: 10350 if (dytc_capabilities & BIT(DYTC_FC_MMC)) 10351 *perfmode = DYTC_MODE_MMC_BALANCE; 10352 else if (dytc_capabilities & BIT(DYTC_FC_PSC)) 10353 *perfmode = DYTC_MODE_PSC_BALANCE; 10354 break; 10355 case PLATFORM_PROFILE_PERFORMANCE: 10356 if (dytc_capabilities & BIT(DYTC_FC_MMC)) 10357 *perfmode = DYTC_MODE_MMC_PERFORM; 10358 else if (dytc_capabilities & BIT(DYTC_FC_PSC)) 10359 *perfmode = DYTC_MODE_PSC_PERFORM; 10360 break; 10361 default: /* Unknown profile */ 10362 return -EOPNOTSUPP; 10363 } 10364 return 0; 10365 } 10366 10367 /* 10368 * dytc_profile_get: Function to register with platform_profile 10369 * handler. Returns current platform profile. 10370 */ 10371 static int dytc_profile_get(struct platform_profile_handler *pprof, 10372 enum platform_profile_option *profile) 10373 { 10374 *profile = dytc_current_profile; 10375 return 0; 10376 } 10377 10378 static int dytc_control_amt(bool enable) 10379 { 10380 int dummy; 10381 int err; 10382 int cmd; 10383 10384 if (!(dytc_capabilities & BIT(DYTC_FC_AMT))) { 10385 pr_warn("Attempting to toggle AMT on a system that doesn't advertise support\n"); 10386 return -ENODEV; 10387 } 10388 10389 if (enable) 10390 cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_ENABLE, enable); 10391 else 10392 cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_DISABLE, enable); 10393 10394 pr_debug("%sabling AMT (cmd 0x%x)", enable ? "en":"dis", cmd); 10395 err = dytc_command(cmd, &dummy); 10396 if (err) 10397 return err; 10398 dytc_amt_active = enable; 10399 return 0; 10400 } 10401 10402 /* 10403 * Helper function - check if we are in CQL mode and if we are 10404 * - disable CQL, 10405 * - run the command 10406 * - enable CQL 10407 * If not in CQL mode, just run the command 10408 */ 10409 static int dytc_cql_command(int command, int *output) 10410 { 10411 int err, cmd_err, dummy; 10412 int cur_funcmode; 10413 10414 /* Determine if we are in CQL mode. This alters the commands we do */ 10415 err = dytc_command(DYTC_CMD_GET, output); 10416 if (err) 10417 return err; 10418 10419 cur_funcmode = (*output >> DYTC_GET_FUNCTION_BIT) & 0xF; 10420 /* Check if we're OK to return immediately */ 10421 if ((command == DYTC_CMD_GET) && (cur_funcmode != DYTC_FUNCTION_CQL)) 10422 return 0; 10423 10424 if (cur_funcmode == DYTC_FUNCTION_CQL) { 10425 atomic_inc(&dytc_ignore_event); 10426 err = dytc_command(DYTC_DISABLE_CQL, &dummy); 10427 if (err) 10428 return err; 10429 } 10430 10431 cmd_err = dytc_command(command, output); 10432 /* Check return condition after we've restored CQL state */ 10433 10434 if (cur_funcmode == DYTC_FUNCTION_CQL) { 10435 err = dytc_command(DYTC_ENABLE_CQL, &dummy); 10436 if (err) 10437 return err; 10438 } 10439 return cmd_err; 10440 } 10441 10442 /* 10443 * dytc_profile_set: Function to register with platform_profile 10444 * handler. Sets current platform profile. 10445 */ 10446 static int dytc_profile_set(struct platform_profile_handler *pprof, 10447 enum platform_profile_option profile) 10448 { 10449 int perfmode; 10450 int output; 10451 int err; 10452 10453 err = mutex_lock_interruptible(&dytc_mutex); 10454 if (err) 10455 return err; 10456 10457 err = convert_profile_to_dytc(profile, &perfmode); 10458 if (err) 10459 goto unlock; 10460 10461 if (dytc_capabilities & BIT(DYTC_FC_MMC)) { 10462 if (profile == PLATFORM_PROFILE_BALANCED) { 10463 /* 10464 * To get back to balanced mode we need to issue a reset command. 10465 * Note we still need to disable CQL mode before hand and re-enable 10466 * it afterwards, otherwise dytc_lapmode gets reset to 0 and stays 10467 * stuck at 0 for aprox. 30 minutes. 10468 */ 10469 err = dytc_cql_command(DYTC_CMD_RESET, &output); 10470 if (err) 10471 goto unlock; 10472 } else { 10473 /* Determine if we are in CQL mode. This alters the commands we do */ 10474 err = dytc_cql_command(DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1), 10475 &output); 10476 if (err) 10477 goto unlock; 10478 } 10479 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { 10480 err = dytc_command(DYTC_SET_COMMAND(DYTC_FUNCTION_PSC, perfmode, 1), &output); 10481 if (err) 10482 goto unlock; 10483 10484 /* system supports AMT, activate it when on balanced */ 10485 if (dytc_capabilities & BIT(DYTC_FC_AMT)) 10486 dytc_control_amt(profile == PLATFORM_PROFILE_BALANCED); 10487 } 10488 /* Success - update current profile */ 10489 dytc_current_profile = profile; 10490 unlock: 10491 mutex_unlock(&dytc_mutex); 10492 return err; 10493 } 10494 10495 static void dytc_profile_refresh(void) 10496 { 10497 enum platform_profile_option profile; 10498 int output = 0, err = 0; 10499 int perfmode, funcmode = 0; 10500 10501 mutex_lock(&dytc_mutex); 10502 if (dytc_capabilities & BIT(DYTC_FC_MMC)) { 10503 if (dytc_mmc_get_available) 10504 err = dytc_command(DYTC_CMD_MMC_GET, &output); 10505 else 10506 err = dytc_cql_command(DYTC_CMD_GET, &output); 10507 funcmode = DYTC_FUNCTION_MMC; 10508 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { 10509 err = dytc_command(DYTC_CMD_GET, &output); 10510 /* Check if we are PSC mode, or have AMT enabled */ 10511 funcmode = (output >> DYTC_GET_FUNCTION_BIT) & 0xF; 10512 } else { /* Unknown profile mode */ 10513 err = -ENODEV; 10514 } 10515 mutex_unlock(&dytc_mutex); 10516 if (err) 10517 return; 10518 10519 perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF; 10520 err = convert_dytc_to_profile(funcmode, perfmode, &profile); 10521 if (!err && profile != dytc_current_profile) { 10522 dytc_current_profile = profile; 10523 platform_profile_notify(); 10524 } 10525 } 10526 10527 static struct platform_profile_handler dytc_profile = { 10528 .profile_get = dytc_profile_get, 10529 .profile_set = dytc_profile_set, 10530 }; 10531 10532 static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm) 10533 { 10534 int err, output; 10535 10536 /* Setup supported modes */ 10537 set_bit(PLATFORM_PROFILE_LOW_POWER, dytc_profile.choices); 10538 set_bit(PLATFORM_PROFILE_BALANCED, dytc_profile.choices); 10539 set_bit(PLATFORM_PROFILE_PERFORMANCE, dytc_profile.choices); 10540 10541 err = dytc_command(DYTC_CMD_QUERY, &output); 10542 if (err) 10543 return err; 10544 10545 if (output & BIT(DYTC_QUERY_ENABLE_BIT)) 10546 dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF; 10547 10548 /* Check DYTC is enabled and supports mode setting */ 10549 if (dytc_version < 5) 10550 return -ENODEV; 10551 10552 /* Check what capabilities are supported */ 10553 err = dytc_command(DYTC_CMD_FUNC_CAP, &dytc_capabilities); 10554 if (err) 10555 return err; 10556 10557 /* Check if user wants to override the profile selection */ 10558 if (profile_force) { 10559 switch (profile_force) { 10560 case -1: 10561 dytc_capabilities = 0; 10562 break; 10563 case 1: 10564 dytc_capabilities = BIT(DYTC_FC_MMC); 10565 break; 10566 case 2: 10567 dytc_capabilities = BIT(DYTC_FC_PSC); 10568 break; 10569 } 10570 pr_debug("Profile selection forced: 0x%x\n", dytc_capabilities); 10571 } 10572 if (dytc_capabilities & BIT(DYTC_FC_MMC)) { /* MMC MODE */ 10573 pr_debug("MMC is supported\n"); 10574 /* 10575 * Check if MMC_GET functionality available 10576 * Version > 6 and return success from MMC_GET command 10577 */ 10578 dytc_mmc_get_available = false; 10579 if (dytc_version >= 6) { 10580 err = dytc_command(DYTC_CMD_MMC_GET, &output); 10581 if (!err && ((output & DYTC_ERR_MASK) == DYTC_ERR_SUCCESS)) 10582 dytc_mmc_get_available = true; 10583 } 10584 } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { /* PSC MODE */ 10585 pr_debug("PSC is supported\n"); 10586 } else { 10587 dbg_printk(TPACPI_DBG_INIT, "No DYTC support available\n"); 10588 return -ENODEV; 10589 } 10590 10591 dbg_printk(TPACPI_DBG_INIT, 10592 "DYTC version %d: thermal mode available\n", dytc_version); 10593 10594 /* Create platform_profile structure and register */ 10595 err = platform_profile_register(&dytc_profile); 10596 /* 10597 * If for some reason platform_profiles aren't enabled 10598 * don't quit terminally. 10599 */ 10600 if (err) 10601 return -ENODEV; 10602 10603 /* Ensure initial values are correct */ 10604 dytc_profile_refresh(); 10605 10606 /* Workaround for https://bugzilla.kernel.org/show_bug.cgi?id=216347 */ 10607 if (dytc_capabilities & BIT(DYTC_FC_PSC)) 10608 dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED); 10609 10610 return 0; 10611 } 10612 10613 static void dytc_profile_exit(void) 10614 { 10615 platform_profile_remove(); 10616 } 10617 10618 static struct ibm_struct dytc_profile_driver_data = { 10619 .name = "dytc-profile", 10620 .exit = dytc_profile_exit, 10621 }; 10622 10623 /************************************************************************* 10624 * Keyboard language interface 10625 */ 10626 10627 struct keyboard_lang_data { 10628 const char *lang_str; 10629 int lang_code; 10630 }; 10631 10632 static const struct keyboard_lang_data keyboard_lang_data[] = { 10633 {"be", 0x080c}, 10634 {"cz", 0x0405}, 10635 {"da", 0x0406}, 10636 {"de", 0x0c07}, 10637 {"en", 0x0000}, 10638 {"es", 0x2c0a}, 10639 {"et", 0x0425}, 10640 {"fr", 0x040c}, 10641 {"fr-ch", 0x100c}, 10642 {"hu", 0x040e}, 10643 {"it", 0x0410}, 10644 {"jp", 0x0411}, 10645 {"nl", 0x0413}, 10646 {"nn", 0x0414}, 10647 {"pl", 0x0415}, 10648 {"pt", 0x0816}, 10649 {"sl", 0x041b}, 10650 {"sv", 0x081d}, 10651 {"tr", 0x041f}, 10652 }; 10653 10654 static int set_keyboard_lang_command(int command) 10655 { 10656 acpi_handle sskl_handle; 10657 int output; 10658 10659 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSKL", &sskl_handle))) { 10660 /* Platform doesn't support SSKL */ 10661 return -ENODEV; 10662 } 10663 10664 if (!acpi_evalf(sskl_handle, &output, NULL, "dd", command)) 10665 return -EIO; 10666 10667 return 0; 10668 } 10669 10670 static int get_keyboard_lang(int *output) 10671 { 10672 acpi_handle gskl_handle; 10673 int kbd_lang; 10674 10675 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSKL", &gskl_handle))) { 10676 /* Platform doesn't support GSKL */ 10677 return -ENODEV; 10678 } 10679 10680 if (!acpi_evalf(gskl_handle, &kbd_lang, NULL, "dd", 0x02000000)) 10681 return -EIO; 10682 10683 /* 10684 * METHOD_ERR gets returned on devices where there are no special (e.g. '=', 10685 * '(' and ')') keys which use layout dependent key-press emulation. 10686 */ 10687 if (kbd_lang & METHOD_ERR) 10688 return -ENODEV; 10689 10690 *output = kbd_lang; 10691 10692 return 0; 10693 } 10694 10695 /* sysfs keyboard language entry */ 10696 static ssize_t keyboard_lang_show(struct device *dev, 10697 struct device_attribute *attr, 10698 char *buf) 10699 { 10700 int output, err, i, len = 0; 10701 10702 err = get_keyboard_lang(&output); 10703 if (err) 10704 return err; 10705 10706 for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) { 10707 if (i) 10708 len += sysfs_emit_at(buf, len, "%s", " "); 10709 10710 if (output == keyboard_lang_data[i].lang_code) { 10711 len += sysfs_emit_at(buf, len, "[%s]", keyboard_lang_data[i].lang_str); 10712 } else { 10713 len += sysfs_emit_at(buf, len, "%s", keyboard_lang_data[i].lang_str); 10714 } 10715 } 10716 len += sysfs_emit_at(buf, len, "\n"); 10717 10718 return len; 10719 } 10720 10721 static ssize_t keyboard_lang_store(struct device *dev, 10722 struct device_attribute *attr, 10723 const char *buf, size_t count) 10724 { 10725 int err, i; 10726 bool lang_found = false; 10727 int lang_code = 0; 10728 10729 for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) { 10730 if (sysfs_streq(buf, keyboard_lang_data[i].lang_str)) { 10731 lang_code = keyboard_lang_data[i].lang_code; 10732 lang_found = true; 10733 break; 10734 } 10735 } 10736 10737 if (lang_found) { 10738 lang_code = lang_code | 1 << 24; 10739 10740 /* Set language code */ 10741 err = set_keyboard_lang_command(lang_code); 10742 if (err) 10743 return err; 10744 } else { 10745 dev_err(&tpacpi_pdev->dev, "Unknown Keyboard language. Ignoring\n"); 10746 return -EINVAL; 10747 } 10748 10749 tpacpi_disclose_usertask(attr->attr.name, 10750 "keyboard language is set to %s\n", buf); 10751 10752 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "keyboard_lang"); 10753 10754 return count; 10755 } 10756 static DEVICE_ATTR_RW(keyboard_lang); 10757 10758 static struct attribute *kbdlang_attributes[] = { 10759 &dev_attr_keyboard_lang.attr, 10760 NULL 10761 }; 10762 10763 static umode_t kbdlang_attr_is_visible(struct kobject *kobj, 10764 struct attribute *attr, int n) 10765 { 10766 return tp_features.kbd_lang ? attr->mode : 0; 10767 } 10768 10769 static const struct attribute_group kbdlang_attr_group = { 10770 .is_visible = kbdlang_attr_is_visible, 10771 .attrs = kbdlang_attributes, 10772 }; 10773 10774 static int tpacpi_kbdlang_init(struct ibm_init_struct *iibm) 10775 { 10776 int err, output; 10777 10778 err = get_keyboard_lang(&output); 10779 tp_features.kbd_lang = !err; 10780 return err; 10781 } 10782 10783 static struct ibm_struct kbdlang_driver_data = { 10784 .name = "kbdlang", 10785 }; 10786 10787 /************************************************************************* 10788 * DPRC(Dynamic Power Reduction Control) subdriver, for the Lenovo WWAN 10789 * and WLAN feature. 10790 */ 10791 #define DPRC_GET_WWAN_ANTENNA_TYPE 0x40000 10792 #define DPRC_WWAN_ANTENNA_TYPE_A_BIT BIT(4) 10793 #define DPRC_WWAN_ANTENNA_TYPE_B_BIT BIT(8) 10794 static bool has_antennatype; 10795 static int wwan_antennatype; 10796 10797 static int dprc_command(int command, int *output) 10798 { 10799 acpi_handle dprc_handle; 10800 10801 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DPRC", &dprc_handle))) { 10802 /* Platform doesn't support DPRC */ 10803 return -ENODEV; 10804 } 10805 10806 if (!acpi_evalf(dprc_handle, output, NULL, "dd", command)) 10807 return -EIO; 10808 10809 /* 10810 * METHOD_ERR gets returned on devices where few commands are not supported 10811 * for example command to get WWAN Antenna type command is not supported on 10812 * some devices. 10813 */ 10814 if (*output & METHOD_ERR) 10815 return -ENODEV; 10816 10817 return 0; 10818 } 10819 10820 static int get_wwan_antenna(int *wwan_antennatype) 10821 { 10822 int output, err; 10823 10824 /* Get current Antenna type */ 10825 err = dprc_command(DPRC_GET_WWAN_ANTENNA_TYPE, &output); 10826 if (err) 10827 return err; 10828 10829 if (output & DPRC_WWAN_ANTENNA_TYPE_A_BIT) 10830 *wwan_antennatype = 1; 10831 else if (output & DPRC_WWAN_ANTENNA_TYPE_B_BIT) 10832 *wwan_antennatype = 2; 10833 else 10834 return -ENODEV; 10835 10836 return 0; 10837 } 10838 10839 /* sysfs wwan antenna type entry */ 10840 static ssize_t wwan_antenna_type_show(struct device *dev, 10841 struct device_attribute *attr, 10842 char *buf) 10843 { 10844 switch (wwan_antennatype) { 10845 case 1: 10846 return sysfs_emit(buf, "type a\n"); 10847 case 2: 10848 return sysfs_emit(buf, "type b\n"); 10849 default: 10850 return -ENODATA; 10851 } 10852 } 10853 static DEVICE_ATTR_RO(wwan_antenna_type); 10854 10855 static struct attribute *dprc_attributes[] = { 10856 &dev_attr_wwan_antenna_type.attr, 10857 NULL 10858 }; 10859 10860 static umode_t dprc_attr_is_visible(struct kobject *kobj, 10861 struct attribute *attr, int n) 10862 { 10863 return has_antennatype ? attr->mode : 0; 10864 } 10865 10866 static const struct attribute_group dprc_attr_group = { 10867 .is_visible = dprc_attr_is_visible, 10868 .attrs = dprc_attributes, 10869 }; 10870 10871 static int tpacpi_dprc_init(struct ibm_init_struct *iibm) 10872 { 10873 int err; 10874 10875 err = get_wwan_antenna(&wwan_antennatype); 10876 if (err) 10877 return err; 10878 10879 has_antennatype = true; 10880 return 0; 10881 } 10882 10883 static struct ibm_struct dprc_driver_data = { 10884 .name = "dprc", 10885 }; 10886 10887 /* --------------------------------------------------------------------- */ 10888 10889 static struct attribute *tpacpi_driver_attributes[] = { 10890 &driver_attr_debug_level.attr, 10891 &driver_attr_version.attr, 10892 &driver_attr_interface_version.attr, 10893 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10894 &driver_attr_wlsw_emulstate.attr, 10895 &driver_attr_bluetooth_emulstate.attr, 10896 &driver_attr_wwan_emulstate.attr, 10897 &driver_attr_uwb_emulstate.attr, 10898 #endif 10899 NULL 10900 }; 10901 10902 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10903 static umode_t tpacpi_attr_is_visible(struct kobject *kobj, 10904 struct attribute *attr, int n) 10905 { 10906 if (attr == &driver_attr_wlsw_emulstate.attr) { 10907 if (!dbg_wlswemul) 10908 return 0; 10909 } else if (attr == &driver_attr_bluetooth_emulstate.attr) { 10910 if (!dbg_bluetoothemul) 10911 return 0; 10912 } else if (attr == &driver_attr_wwan_emulstate.attr) { 10913 if (!dbg_wwanemul) 10914 return 0; 10915 } else if (attr == &driver_attr_uwb_emulstate.attr) { 10916 if (!dbg_uwbemul) 10917 return 0; 10918 } 10919 10920 return attr->mode; 10921 } 10922 #endif 10923 10924 static const struct attribute_group tpacpi_driver_attr_group = { 10925 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10926 .is_visible = tpacpi_attr_is_visible, 10927 #endif 10928 .attrs = tpacpi_driver_attributes, 10929 }; 10930 10931 static const struct attribute_group *tpacpi_driver_groups[] = { 10932 &tpacpi_driver_attr_group, 10933 NULL, 10934 }; 10935 10936 static const struct attribute_group *tpacpi_groups[] = { 10937 &adaptive_kbd_attr_group, 10938 &hotkey_attr_group, 10939 &bluetooth_attr_group, 10940 &wan_attr_group, 10941 &cmos_attr_group, 10942 &proxsensor_attr_group, 10943 &kbdlang_attr_group, 10944 &dprc_attr_group, 10945 NULL, 10946 }; 10947 10948 static const struct attribute_group *tpacpi_hwmon_groups[] = { 10949 &thermal_attr_group, 10950 &temp_label_attr_group, 10951 &fan_attr_group, 10952 NULL, 10953 }; 10954 10955 static const struct attribute_group *tpacpi_hwmon_driver_groups[] = { 10956 &fan_driver_attr_group, 10957 NULL, 10958 }; 10959 10960 /**************************************************************************** 10961 **************************************************************************** 10962 * 10963 * Platform drivers 10964 * 10965 **************************************************************************** 10966 ****************************************************************************/ 10967 10968 static struct platform_driver tpacpi_pdriver = { 10969 .driver = { 10970 .name = TPACPI_DRVR_NAME, 10971 .pm = &tpacpi_pm, 10972 .groups = tpacpi_driver_groups, 10973 .dev_groups = tpacpi_groups, 10974 }, 10975 .shutdown = tpacpi_shutdown_handler, 10976 }; 10977 10978 static struct platform_driver tpacpi_hwmon_pdriver = { 10979 .driver = { 10980 .name = TPACPI_HWMON_DRVR_NAME, 10981 .groups = tpacpi_hwmon_driver_groups, 10982 }, 10983 }; 10984 10985 /**************************************************************************** 10986 **************************************************************************** 10987 * 10988 * Infrastructure 10989 * 10990 **************************************************************************** 10991 ****************************************************************************/ 10992 10993 /* 10994 * HKEY event callout for other subdrivers go here 10995 * (yes, it is ugly, but it is quick, safe, and gets the job done 10996 */ 10997 static void tpacpi_driver_event(const unsigned int hkey_event) 10998 { 10999 if (ibm_backlight_device) { 11000 switch (hkey_event) { 11001 case TP_HKEY_EV_BRGHT_UP: 11002 case TP_HKEY_EV_BRGHT_DOWN: 11003 tpacpi_brightness_notify_change(); 11004 } 11005 } 11006 if (alsa_card) { 11007 switch (hkey_event) { 11008 case TP_HKEY_EV_VOL_UP: 11009 case TP_HKEY_EV_VOL_DOWN: 11010 case TP_HKEY_EV_VOL_MUTE: 11011 volume_alsa_notify_change(); 11012 } 11013 } 11014 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) { 11015 enum led_brightness brightness; 11016 11017 mutex_lock(&kbdlight_mutex); 11018 11019 /* 11020 * Check the brightness actually changed, setting the brightness 11021 * through kbdlight_set_level() also triggers this event. 11022 */ 11023 brightness = kbdlight_sysfs_get(NULL); 11024 if (kbdlight_brightness != brightness) { 11025 kbdlight_brightness = brightness; 11026 led_classdev_notify_brightness_hw_changed( 11027 &tpacpi_led_kbdlight.led_classdev, brightness); 11028 } 11029 11030 mutex_unlock(&kbdlight_mutex); 11031 } 11032 11033 if (hkey_event == TP_HKEY_EV_THM_CSM_COMPLETED) { 11034 lapsensor_refresh(); 11035 /* If we are already accessing DYTC then skip dytc update */ 11036 if (!atomic_add_unless(&dytc_ignore_event, -1, 0)) 11037 dytc_profile_refresh(); 11038 } 11039 11040 if (lcdshadow_dev && hkey_event == TP_HKEY_EV_PRIVACYGUARD_TOGGLE) { 11041 enum drm_privacy_screen_status old_hw_state; 11042 bool changed; 11043 11044 mutex_lock(&lcdshadow_dev->lock); 11045 old_hw_state = lcdshadow_dev->hw_state; 11046 lcdshadow_get_hw_state(lcdshadow_dev); 11047 changed = lcdshadow_dev->hw_state != old_hw_state; 11048 mutex_unlock(&lcdshadow_dev->lock); 11049 11050 if (changed) 11051 drm_privacy_screen_call_notifier_chain(lcdshadow_dev); 11052 } 11053 if (hkey_event == TP_HKEY_EV_AMT_TOGGLE) { 11054 /* If we're enabling AMT we need to force balanced mode */ 11055 if (!dytc_amt_active) 11056 /* This will also set AMT mode enabled */ 11057 dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED); 11058 else 11059 dytc_control_amt(!dytc_amt_active); 11060 } 11061 11062 } 11063 11064 static void hotkey_driver_event(const unsigned int scancode) 11065 { 11066 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 11067 } 11068 11069 /* --------------------------------------------------------------------- */ 11070 11071 /* /proc support */ 11072 static struct proc_dir_entry *proc_dir; 11073 11074 /* 11075 * Module and infrastructure proble, init and exit handling 11076 */ 11077 11078 static bool force_load; 11079 11080 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 11081 static const char * __init str_supported(int is_supported) 11082 { 11083 static char text_unsupported[] __initdata = "not supported"; 11084 11085 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 11086 } 11087 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 11088 11089 static void ibm_exit(struct ibm_struct *ibm) 11090 { 11091 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 11092 11093 list_del_init(&ibm->all_drivers); 11094 11095 if (ibm->flags.acpi_notify_installed) { 11096 dbg_printk(TPACPI_DBG_EXIT, 11097 "%s: acpi_remove_notify_handler\n", ibm->name); 11098 BUG_ON(!ibm->acpi); 11099 acpi_remove_notify_handler(*ibm->acpi->handle, 11100 ibm->acpi->type, 11101 dispatch_acpi_notify); 11102 ibm->flags.acpi_notify_installed = 0; 11103 } 11104 11105 if (ibm->flags.proc_created) { 11106 dbg_printk(TPACPI_DBG_EXIT, 11107 "%s: remove_proc_entry\n", ibm->name); 11108 remove_proc_entry(ibm->name, proc_dir); 11109 ibm->flags.proc_created = 0; 11110 } 11111 11112 if (ibm->flags.acpi_driver_registered) { 11113 dbg_printk(TPACPI_DBG_EXIT, 11114 "%s: acpi_bus_unregister_driver\n", ibm->name); 11115 BUG_ON(!ibm->acpi); 11116 acpi_bus_unregister_driver(ibm->acpi->driver); 11117 kfree(ibm->acpi->driver); 11118 ibm->acpi->driver = NULL; 11119 ibm->flags.acpi_driver_registered = 0; 11120 } 11121 11122 if (ibm->flags.init_called && ibm->exit) { 11123 ibm->exit(); 11124 ibm->flags.init_called = 0; 11125 } 11126 11127 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 11128 } 11129 11130 static int __init ibm_init(struct ibm_init_struct *iibm) 11131 { 11132 int ret; 11133 struct ibm_struct *ibm = iibm->data; 11134 struct proc_dir_entry *entry; 11135 11136 BUG_ON(ibm == NULL); 11137 11138 INIT_LIST_HEAD(&ibm->all_drivers); 11139 11140 if (ibm->flags.experimental && !experimental) 11141 return 0; 11142 11143 dbg_printk(TPACPI_DBG_INIT, 11144 "probing for %s\n", ibm->name); 11145 11146 if (iibm->init) { 11147 ret = iibm->init(iibm); 11148 if (ret > 0 || ret == -ENODEV) 11149 return 0; /* subdriver functionality not available */ 11150 if (ret) 11151 return ret; 11152 11153 ibm->flags.init_called = 1; 11154 } 11155 11156 if (ibm->acpi) { 11157 if (ibm->acpi->hid) { 11158 ret = register_tpacpi_subdriver(ibm); 11159 if (ret) 11160 goto err_out; 11161 } 11162 11163 if (ibm->acpi->notify) { 11164 ret = setup_acpi_notify(ibm); 11165 if (ret == -ENODEV) { 11166 pr_notice("disabling subdriver %s\n", 11167 ibm->name); 11168 ret = 0; 11169 goto err_out; 11170 } 11171 if (ret < 0) 11172 goto err_out; 11173 } 11174 } 11175 11176 dbg_printk(TPACPI_DBG_INIT, 11177 "%s installed\n", ibm->name); 11178 11179 if (ibm->read) { 11180 umode_t mode = iibm->base_procfs_mode; 11181 11182 if (!mode) 11183 mode = S_IRUGO; 11184 if (ibm->write) 11185 mode |= S_IWUSR; 11186 entry = proc_create_data(ibm->name, mode, proc_dir, 11187 &dispatch_proc_ops, ibm); 11188 if (!entry) { 11189 pr_err("unable to create proc entry %s\n", ibm->name); 11190 ret = -ENODEV; 11191 goto err_out; 11192 } 11193 ibm->flags.proc_created = 1; 11194 } 11195 11196 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 11197 11198 return 0; 11199 11200 err_out: 11201 dbg_printk(TPACPI_DBG_INIT, 11202 "%s: at error exit path with result %d\n", 11203 ibm->name, ret); 11204 11205 ibm_exit(ibm); 11206 return (ret < 0) ? ret : 0; 11207 } 11208 11209 /* Probing */ 11210 11211 static char __init tpacpi_parse_fw_id(const char * const s, 11212 u32 *model, u16 *release) 11213 { 11214 int i; 11215 11216 if (!s || strlen(s) < 8) 11217 goto invalid; 11218 11219 for (i = 0; i < 8; i++) 11220 if (!((s[i] >= '0' && s[i] <= '9') || 11221 (s[i] >= 'A' && s[i] <= 'Z'))) 11222 goto invalid; 11223 11224 /* 11225 * Most models: xxyTkkWW (#.##c) 11226 * Ancient 570/600 and -SL lacks (#.##c) 11227 */ 11228 if (s[3] == 'T' || s[3] == 'N') { 11229 *model = TPID(s[0], s[1]); 11230 *release = TPVER(s[4], s[5]); 11231 return s[2]; 11232 11233 /* New models: xxxyTkkW (#.##c); T550 and some others */ 11234 } else if (s[4] == 'T' || s[4] == 'N') { 11235 *model = TPID3(s[0], s[1], s[2]); 11236 *release = TPVER(s[5], s[6]); 11237 return s[3]; 11238 } 11239 11240 invalid: 11241 return '\0'; 11242 } 11243 11244 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private) 11245 { 11246 char *ec_fw_string = (char *) private; 11247 const char *dmi_data = (const char *)dm; 11248 /* 11249 * ThinkPad Embedded Controller Program Table on newer models 11250 * 11251 * Offset | Name | Width | Description 11252 * ---------------------------------------------------- 11253 * 0x00 | Type | BYTE | 0x8C 11254 * 0x01 | Length | BYTE | 11255 * 0x02 | Handle | WORD | Varies 11256 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO" 11257 * 0x0A | OEM struct offset | BYTE | 0x0B 11258 * 0x0B | OEM struct number | BYTE | 0x07, for this structure 11259 * 0x0C | OEM struct revision | BYTE | 0x01, for this format 11260 * 0x0D | ECP version ID | STR ID | 11261 * 0x0E | ECP release date | STR ID | 11262 */ 11263 11264 /* Return if data structure not match */ 11265 if (dm->type != 140 || dm->length < 0x0F || 11266 memcmp(dmi_data + 4, "LENOVO", 6) != 0 || 11267 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 || 11268 dmi_data[0x0C] != 0x01) 11269 return; 11270 11271 /* fwstr is the first 8byte string */ 11272 strncpy(ec_fw_string, dmi_data + 0x0F, 8); 11273 } 11274 11275 /* returns 0 - probe ok, or < 0 - probe error. 11276 * Probe ok doesn't mean thinkpad found. 11277 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 11278 static int __must_check __init get_thinkpad_model_data( 11279 struct thinkpad_id_data *tp) 11280 { 11281 const struct dmi_device *dev = NULL; 11282 char ec_fw_string[18] = {0}; 11283 char const *s; 11284 char t; 11285 11286 if (!tp) 11287 return -EINVAL; 11288 11289 memset(tp, 0, sizeof(*tp)); 11290 11291 if (dmi_name_in_vendors("IBM")) 11292 tp->vendor = PCI_VENDOR_ID_IBM; 11293 else if (dmi_name_in_vendors("LENOVO")) 11294 tp->vendor = PCI_VENDOR_ID_LENOVO; 11295 else 11296 return 0; 11297 11298 s = dmi_get_system_info(DMI_BIOS_VERSION); 11299 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 11300 if (s && !tp->bios_version_str) 11301 return -ENOMEM; 11302 11303 /* Really ancient ThinkPad 240X will fail this, which is fine */ 11304 t = tpacpi_parse_fw_id(tp->bios_version_str, 11305 &tp->bios_model, &tp->bios_release); 11306 if (t != 'E' && t != 'C') 11307 return 0; 11308 11309 /* 11310 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 11311 * X32 or newer, all Z series; Some models must have an 11312 * up-to-date BIOS or they will not be detected. 11313 * 11314 * See https://thinkwiki.org/wiki/List_of_DMI_IDs 11315 */ 11316 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 11317 if (sscanf(dev->name, 11318 "IBM ThinkPad Embedded Controller -[%17c", 11319 ec_fw_string) == 1) { 11320 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 11321 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 11322 break; 11323 } 11324 } 11325 11326 /* Newer ThinkPads have different EC program info table */ 11327 if (!ec_fw_string[0]) 11328 dmi_walk(find_new_ec_fwstr, &ec_fw_string); 11329 11330 if (ec_fw_string[0]) { 11331 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 11332 if (!tp->ec_version_str) 11333 return -ENOMEM; 11334 11335 t = tpacpi_parse_fw_id(ec_fw_string, 11336 &tp->ec_model, &tp->ec_release); 11337 if (t != 'H') { 11338 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n", 11339 ec_fw_string); 11340 pr_notice("please report this to %s\n", TPACPI_MAIL); 11341 } 11342 } 11343 11344 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 11345 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 11346 tp->model_str = kstrdup(s, GFP_KERNEL); 11347 if (!tp->model_str) 11348 return -ENOMEM; 11349 } else { 11350 s = dmi_get_system_info(DMI_BIOS_VENDOR); 11351 if (s && !(strncasecmp(s, "Lenovo", 6))) { 11352 tp->model_str = kstrdup(s, GFP_KERNEL); 11353 if (!tp->model_str) 11354 return -ENOMEM; 11355 } 11356 } 11357 11358 s = dmi_get_system_info(DMI_PRODUCT_NAME); 11359 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 11360 if (s && !tp->nummodel_str) 11361 return -ENOMEM; 11362 11363 return 0; 11364 } 11365 11366 static int __init probe_for_thinkpad(void) 11367 { 11368 int is_thinkpad; 11369 11370 if (acpi_disabled) 11371 return -ENODEV; 11372 11373 /* It would be dangerous to run the driver in this case */ 11374 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 11375 return -ENODEV; 11376 11377 /* 11378 * Non-ancient models have better DMI tagging, but very old models 11379 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 11380 */ 11381 is_thinkpad = (thinkpad_id.model_str != NULL) || 11382 (thinkpad_id.ec_model != 0) || 11383 tpacpi_is_fw_known(); 11384 11385 /* The EC handler is required */ 11386 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 11387 if (!ec_handle) { 11388 if (is_thinkpad) 11389 pr_err("Not yet supported ThinkPad detected!\n"); 11390 return -ENODEV; 11391 } 11392 11393 if (!is_thinkpad && !force_load) 11394 return -ENODEV; 11395 11396 return 0; 11397 } 11398 11399 static void __init thinkpad_acpi_init_banner(void) 11400 { 11401 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 11402 pr_info("%s\n", TPACPI_URL); 11403 11404 pr_info("ThinkPad BIOS %s, EC %s\n", 11405 (thinkpad_id.bios_version_str) ? 11406 thinkpad_id.bios_version_str : "unknown", 11407 (thinkpad_id.ec_version_str) ? 11408 thinkpad_id.ec_version_str : "unknown"); 11409 11410 BUG_ON(!thinkpad_id.vendor); 11411 11412 if (thinkpad_id.model_str) 11413 pr_info("%s %s, model %s\n", 11414 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 11415 "IBM" : ((thinkpad_id.vendor == 11416 PCI_VENDOR_ID_LENOVO) ? 11417 "Lenovo" : "Unknown vendor"), 11418 thinkpad_id.model_str, 11419 (thinkpad_id.nummodel_str) ? 11420 thinkpad_id.nummodel_str : "unknown"); 11421 } 11422 11423 /* Module init, exit, parameters */ 11424 11425 static struct ibm_init_struct ibms_init[] __initdata = { 11426 { 11427 .data = &thinkpad_acpi_driver_data, 11428 }, 11429 { 11430 .init = hotkey_init, 11431 .data = &hotkey_driver_data, 11432 }, 11433 { 11434 .init = bluetooth_init, 11435 .data = &bluetooth_driver_data, 11436 }, 11437 { 11438 .init = wan_init, 11439 .data = &wan_driver_data, 11440 }, 11441 { 11442 .init = uwb_init, 11443 .data = &uwb_driver_data, 11444 }, 11445 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 11446 { 11447 .init = video_init, 11448 .base_procfs_mode = S_IRUSR, 11449 .data = &video_driver_data, 11450 }, 11451 #endif 11452 { 11453 .init = kbdlight_init, 11454 .data = &kbdlight_driver_data, 11455 }, 11456 { 11457 .init = light_init, 11458 .data = &light_driver_data, 11459 }, 11460 { 11461 .init = cmos_init, 11462 .data = &cmos_driver_data, 11463 }, 11464 { 11465 .init = led_init, 11466 .data = &led_driver_data, 11467 }, 11468 { 11469 .init = beep_init, 11470 .data = &beep_driver_data, 11471 }, 11472 { 11473 .init = thermal_init, 11474 .data = &thermal_driver_data, 11475 }, 11476 { 11477 .init = brightness_init, 11478 .data = &brightness_driver_data, 11479 }, 11480 { 11481 .init = volume_init, 11482 .data = &volume_driver_data, 11483 }, 11484 { 11485 .init = fan_init, 11486 .data = &fan_driver_data, 11487 }, 11488 { 11489 .init = mute_led_init, 11490 .data = &mute_led_driver_data, 11491 }, 11492 { 11493 .init = tpacpi_battery_init, 11494 .data = &battery_driver_data, 11495 }, 11496 { 11497 .init = tpacpi_lcdshadow_init, 11498 .data = &lcdshadow_driver_data, 11499 }, 11500 { 11501 .init = tpacpi_proxsensor_init, 11502 .data = &proxsensor_driver_data, 11503 }, 11504 { 11505 .init = tpacpi_dytc_profile_init, 11506 .data = &dytc_profile_driver_data, 11507 }, 11508 { 11509 .init = tpacpi_kbdlang_init, 11510 .data = &kbdlang_driver_data, 11511 }, 11512 { 11513 .init = tpacpi_dprc_init, 11514 .data = &dprc_driver_data, 11515 }, 11516 }; 11517 11518 static int __init set_ibm_param(const char *val, const struct kernel_param *kp) 11519 { 11520 unsigned int i; 11521 struct ibm_struct *ibm; 11522 11523 if (!kp || !kp->name || !val) 11524 return -EINVAL; 11525 11526 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 11527 ibm = ibms_init[i].data; 11528 if (!ibm || !ibm->name) 11529 continue; 11530 11531 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 11532 if (strlen(val) > sizeof(ibms_init[i].param) - 1) 11533 return -ENOSPC; 11534 strcpy(ibms_init[i].param, val); 11535 return 0; 11536 } 11537 } 11538 11539 return -EINVAL; 11540 } 11541 11542 module_param(experimental, int, 0444); 11543 MODULE_PARM_DESC(experimental, 11544 "Enables experimental features when non-zero"); 11545 11546 module_param_named(debug, dbg_level, uint, 0); 11547 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 11548 11549 module_param(force_load, bool, 0444); 11550 MODULE_PARM_DESC(force_load, 11551 "Attempts to load the driver even on a mis-identified ThinkPad when true"); 11552 11553 module_param_named(fan_control, fan_control_allowed, bool, 0444); 11554 MODULE_PARM_DESC(fan_control, 11555 "Enables setting fan parameters features when true"); 11556 11557 module_param_named(brightness_mode, brightness_mode, uint, 0444); 11558 MODULE_PARM_DESC(brightness_mode, 11559 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 11560 11561 module_param(brightness_enable, uint, 0444); 11562 MODULE_PARM_DESC(brightness_enable, 11563 "Enables backlight control when 1, disables when 0"); 11564 11565 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 11566 module_param_named(volume_mode, volume_mode, uint, 0444); 11567 MODULE_PARM_DESC(volume_mode, 11568 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 11569 11570 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 11571 MODULE_PARM_DESC(volume_capabilities, 11572 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only"); 11573 11574 module_param_named(volume_control, volume_control_allowed, bool, 0444); 11575 MODULE_PARM_DESC(volume_control, 11576 "Enables software override for the console audio control when true"); 11577 11578 module_param_named(software_mute, software_mute_requested, bool, 0444); 11579 MODULE_PARM_DESC(software_mute, 11580 "Request full software mute control"); 11581 11582 /* ALSA module API parameters */ 11583 module_param_named(index, alsa_index, int, 0444); 11584 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 11585 module_param_named(id, alsa_id, charp, 0444); 11586 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 11587 module_param_named(enable, alsa_enable, bool, 0444); 11588 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 11589 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 11590 11591 /* The module parameter can't be read back, that's why 0 is used here */ 11592 #define TPACPI_PARAM(feature) \ 11593 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 11594 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation") 11595 11596 TPACPI_PARAM(hotkey); 11597 TPACPI_PARAM(bluetooth); 11598 TPACPI_PARAM(video); 11599 TPACPI_PARAM(light); 11600 TPACPI_PARAM(cmos); 11601 TPACPI_PARAM(led); 11602 TPACPI_PARAM(beep); 11603 TPACPI_PARAM(brightness); 11604 TPACPI_PARAM(volume); 11605 TPACPI_PARAM(fan); 11606 11607 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 11608 module_param(dbg_wlswemul, uint, 0444); 11609 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 11610 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 11611 MODULE_PARM_DESC(wlsw_state, 11612 "Initial state of the emulated WLSW switch"); 11613 11614 module_param(dbg_bluetoothemul, uint, 0444); 11615 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 11616 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 11617 MODULE_PARM_DESC(bluetooth_state, 11618 "Initial state of the emulated bluetooth switch"); 11619 11620 module_param(dbg_wwanemul, uint, 0444); 11621 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 11622 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 11623 MODULE_PARM_DESC(wwan_state, 11624 "Initial state of the emulated WWAN switch"); 11625 11626 module_param(dbg_uwbemul, uint, 0444); 11627 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 11628 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 11629 MODULE_PARM_DESC(uwb_state, 11630 "Initial state of the emulated UWB switch"); 11631 #endif 11632 11633 module_param(profile_force, int, 0444); 11634 MODULE_PARM_DESC(profile_force, "Force profile mode. -1=off, 1=MMC, 2=PSC"); 11635 11636 static void thinkpad_acpi_module_exit(void) 11637 { 11638 struct ibm_struct *ibm, *itmp; 11639 11640 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 11641 11642 if (tpacpi_hwmon) 11643 hwmon_device_unregister(tpacpi_hwmon); 11644 if (tp_features.sensors_pdrv_registered) 11645 platform_driver_unregister(&tpacpi_hwmon_pdriver); 11646 if (tp_features.platform_drv_registered) 11647 platform_driver_unregister(&tpacpi_pdriver); 11648 11649 list_for_each_entry_safe_reverse(ibm, itmp, 11650 &tpacpi_all_drivers, 11651 all_drivers) { 11652 ibm_exit(ibm); 11653 } 11654 11655 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 11656 11657 if (tpacpi_inputdev) { 11658 if (tp_features.input_device_registered) 11659 input_unregister_device(tpacpi_inputdev); 11660 else 11661 input_free_device(tpacpi_inputdev); 11662 kfree(hotkey_keycode_map); 11663 } 11664 11665 if (tpacpi_sensors_pdev) 11666 platform_device_unregister(tpacpi_sensors_pdev); 11667 if (tpacpi_pdev) 11668 platform_device_unregister(tpacpi_pdev); 11669 if (proc_dir) 11670 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 11671 if (tpacpi_wq) 11672 destroy_workqueue(tpacpi_wq); 11673 11674 kfree(thinkpad_id.bios_version_str); 11675 kfree(thinkpad_id.ec_version_str); 11676 kfree(thinkpad_id.model_str); 11677 kfree(thinkpad_id.nummodel_str); 11678 } 11679 11680 11681 static int __init thinkpad_acpi_module_init(void) 11682 { 11683 const struct dmi_system_id *dmi_id; 11684 int ret, i; 11685 acpi_object_type obj_type; 11686 11687 tpacpi_lifecycle = TPACPI_LIFE_INIT; 11688 11689 /* Driver-level probe */ 11690 11691 ret = get_thinkpad_model_data(&thinkpad_id); 11692 if (ret) { 11693 pr_err("unable to get DMI data: %d\n", ret); 11694 thinkpad_acpi_module_exit(); 11695 return ret; 11696 } 11697 ret = probe_for_thinkpad(); 11698 if (ret) { 11699 thinkpad_acpi_module_exit(); 11700 return ret; 11701 } 11702 11703 /* Driver initialization */ 11704 11705 thinkpad_acpi_init_banner(); 11706 tpacpi_check_outdated_fw(); 11707 11708 TPACPI_ACPIHANDLE_INIT(ecrd); 11709 TPACPI_ACPIHANDLE_INIT(ecwr); 11710 11711 /* 11712 * Quirk: in some models (e.g. X380 Yoga), an object named ECRD 11713 * exists, but it is a register, not a method. 11714 */ 11715 if (ecrd_handle) { 11716 acpi_get_type(ecrd_handle, &obj_type); 11717 if (obj_type != ACPI_TYPE_METHOD) 11718 ecrd_handle = NULL; 11719 } 11720 if (ecwr_handle) { 11721 acpi_get_type(ecwr_handle, &obj_type); 11722 if (obj_type != ACPI_TYPE_METHOD) 11723 ecwr_handle = NULL; 11724 } 11725 11726 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 11727 if (!tpacpi_wq) { 11728 thinkpad_acpi_module_exit(); 11729 return -ENOMEM; 11730 } 11731 11732 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 11733 if (!proc_dir) { 11734 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 11735 thinkpad_acpi_module_exit(); 11736 return -ENODEV; 11737 } 11738 11739 dmi_id = dmi_first_match(fwbug_list); 11740 if (dmi_id) 11741 tp_features.quirks = dmi_id->driver_data; 11742 11743 /* Device initialization */ 11744 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, PLATFORM_DEVID_NONE, 11745 NULL, 0); 11746 if (IS_ERR(tpacpi_pdev)) { 11747 ret = PTR_ERR(tpacpi_pdev); 11748 tpacpi_pdev = NULL; 11749 pr_err("unable to register platform device\n"); 11750 thinkpad_acpi_module_exit(); 11751 return ret; 11752 } 11753 tpacpi_sensors_pdev = platform_device_register_simple( 11754 TPACPI_HWMON_DRVR_NAME, 11755 PLATFORM_DEVID_NONE, NULL, 0); 11756 if (IS_ERR(tpacpi_sensors_pdev)) { 11757 ret = PTR_ERR(tpacpi_sensors_pdev); 11758 tpacpi_sensors_pdev = NULL; 11759 pr_err("unable to register hwmon platform device\n"); 11760 thinkpad_acpi_module_exit(); 11761 return ret; 11762 } 11763 11764 mutex_init(&tpacpi_inputdev_send_mutex); 11765 tpacpi_inputdev = input_allocate_device(); 11766 if (!tpacpi_inputdev) { 11767 thinkpad_acpi_module_exit(); 11768 return -ENOMEM; 11769 } else { 11770 /* Prepare input device, but don't register */ 11771 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 11772 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 11773 tpacpi_inputdev->id.bustype = BUS_HOST; 11774 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 11775 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 11776 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 11777 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 11778 } 11779 11780 /* Init subdriver dependencies */ 11781 tpacpi_detect_brightness_capabilities(); 11782 11783 /* Init subdrivers */ 11784 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 11785 ret = ibm_init(&ibms_init[i]); 11786 if (ret >= 0 && *ibms_init[i].param) 11787 ret = ibms_init[i].data->write(ibms_init[i].param); 11788 if (ret < 0) { 11789 thinkpad_acpi_module_exit(); 11790 return ret; 11791 } 11792 } 11793 11794 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 11795 11796 ret = platform_driver_register(&tpacpi_pdriver); 11797 if (ret) { 11798 pr_err("unable to register main platform driver\n"); 11799 thinkpad_acpi_module_exit(); 11800 return ret; 11801 } 11802 tp_features.platform_drv_registered = 1; 11803 11804 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 11805 if (ret) { 11806 pr_err("unable to register hwmon platform driver\n"); 11807 thinkpad_acpi_module_exit(); 11808 return ret; 11809 } 11810 tp_features.sensors_pdrv_registered = 1; 11811 11812 tpacpi_hwmon = hwmon_device_register_with_groups( 11813 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, tpacpi_hwmon_groups); 11814 if (IS_ERR(tpacpi_hwmon)) { 11815 ret = PTR_ERR(tpacpi_hwmon); 11816 tpacpi_hwmon = NULL; 11817 pr_err("unable to register hwmon device\n"); 11818 thinkpad_acpi_module_exit(); 11819 return ret; 11820 } 11821 11822 ret = input_register_device(tpacpi_inputdev); 11823 if (ret < 0) { 11824 pr_err("unable to register input device\n"); 11825 thinkpad_acpi_module_exit(); 11826 return ret; 11827 } else { 11828 tp_features.input_device_registered = 1; 11829 } 11830 11831 return 0; 11832 } 11833 11834 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 11835 11836 /* 11837 * This will autoload the driver in almost every ThinkPad 11838 * in widespread use. 11839 * 11840 * Only _VERY_ old models, like the 240, 240x and 570 lack 11841 * the HKEY event interface. 11842 */ 11843 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 11844 11845 /* 11846 * DMI matching for module autoloading 11847 * 11848 * See https://thinkwiki.org/wiki/List_of_DMI_IDs 11849 * See https://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 11850 * 11851 * Only models listed in thinkwiki will be supported, so add yours 11852 * if it is not there yet. 11853 */ 11854 #define IBM_BIOS_MODULE_ALIAS(__type) \ 11855 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 11856 11857 /* Ancient thinkpad BIOSes have to be identified by 11858 * BIOS type or model number, and there are far less 11859 * BIOS types than model numbers... */ 11860 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 11861 11862 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 11863 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 11864 MODULE_DESCRIPTION(TPACPI_DESC); 11865 MODULE_VERSION(TPACPI_VERSION); 11866 MODULE_LICENSE("GPL"); 11867 11868 module_init(thinkpad_acpi_module_init); 11869 module_exit(thinkpad_acpi_module_exit); 11870