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