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