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 <sound/core.h> 70 #include <sound/control.h> 71 #include <sound/initval.h> 72 #include <linux/uaccess.h> 73 #include <acpi/battery.h> 74 #include <acpi/video.h> 75 76 /* ThinkPad CMOS commands */ 77 #define TP_CMOS_VOLUME_DOWN 0 78 #define TP_CMOS_VOLUME_UP 1 79 #define TP_CMOS_VOLUME_MUTE 2 80 #define TP_CMOS_BRIGHTNESS_UP 4 81 #define TP_CMOS_BRIGHTNESS_DOWN 5 82 #define TP_CMOS_THINKLIGHT_ON 12 83 #define TP_CMOS_THINKLIGHT_OFF 13 84 85 /* NVRAM Addresses */ 86 enum tp_nvram_addr { 87 TP_NVRAM_ADDR_HK2 = 0x57, 88 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 89 TP_NVRAM_ADDR_VIDEO = 0x59, 90 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 91 TP_NVRAM_ADDR_MIXER = 0x60, 92 }; 93 94 /* NVRAM bit masks */ 95 enum { 96 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 97 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 98 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 99 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 100 TP_NVRAM_MASK_THINKLIGHT = 0x10, 101 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 102 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 103 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 104 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 105 TP_NVRAM_MASK_MUTE = 0x40, 106 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 107 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 108 TP_NVRAM_POS_LEVEL_VOLUME = 0, 109 }; 110 111 /* Misc NVRAM-related */ 112 enum { 113 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 114 }; 115 116 /* ACPI HIDs */ 117 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 118 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 119 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID "LEN0268" 120 #define TPACPI_ACPI_EC_HID "PNP0C09" 121 122 /* Input IDs */ 123 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 124 #define TPACPI_HKEY_INPUT_VERSION 0x4101 125 126 /* ACPI \WGSV commands */ 127 enum { 128 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 129 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 130 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 131 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 132 }; 133 134 /* TP_ACPI_WGSV_GET_STATE bits */ 135 enum { 136 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 137 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 138 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 139 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 140 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 141 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 142 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 143 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 144 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 145 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 146 }; 147 148 /* HKEY events */ 149 enum tpacpi_hkey_event_t { 150 /* Hotkey-related */ 151 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 152 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 153 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 154 TP_HKEY_EV_KBD_LIGHT = 0x1012, /* Thinklight/kbd backlight */ 155 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 156 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 157 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 158 159 /* Reasons for waking up from S3/S4 */ 160 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 161 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 162 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 163 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 164 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 165 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 166 167 /* Auto-sleep after eject request */ 168 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 169 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 170 171 /* Misc bay events */ 172 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 173 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 174 or port replicator */ 175 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 176 dock or port replicator */ 177 178 /* User-interface events */ 179 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 180 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 181 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 182 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 183 TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016): 184 * enter/leave tablet mode 185 */ 186 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 187 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 188 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 189 190 /* Key-related user-interface events */ 191 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 192 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 193 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */ 194 195 /* Thermal events */ 196 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 197 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 198 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 199 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 200 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* windows; thermal table changed */ 201 TP_HKEY_EV_THM_CSM_COMPLETED = 0x6032, /* windows; thermal control set 202 * command completed. Related to 203 * AML DYTC */ 204 TP_HKEY_EV_THM_TRANSFM_CHANGED = 0x60F0, /* windows; thermal transformation 205 * changed. Related to AML GMTS */ 206 207 /* AC-related events */ 208 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 209 210 /* Further user-interface events */ 211 TP_HKEY_EV_PALM_DETECTED = 0x60b0, /* palm hoveres keyboard */ 212 TP_HKEY_EV_PALM_UNDETECTED = 0x60b1, /* palm removed */ 213 214 /* Misc */ 215 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 216 }; 217 218 /**************************************************************************** 219 * Main driver 220 */ 221 222 #define TPACPI_NAME "thinkpad" 223 #define TPACPI_DESC "ThinkPad ACPI Extras" 224 #define TPACPI_FILE TPACPI_NAME "_acpi" 225 #define TPACPI_URL "http://ibm-acpi.sf.net/" 226 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 227 228 #define TPACPI_PROC_DIR "ibm" 229 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 230 #define TPACPI_DRVR_NAME TPACPI_FILE 231 #define TPACPI_DRVR_SHORTNAME "tpacpi" 232 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 233 234 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 235 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 236 237 #define TPACPI_MAX_ACPI_ARGS 3 238 239 /* Debugging printk groups */ 240 #define TPACPI_DBG_ALL 0xffff 241 #define TPACPI_DBG_DISCLOSETASK 0x8000 242 #define TPACPI_DBG_INIT 0x0001 243 #define TPACPI_DBG_EXIT 0x0002 244 #define TPACPI_DBG_RFKILL 0x0004 245 #define TPACPI_DBG_HKEY 0x0008 246 #define TPACPI_DBG_FAN 0x0010 247 #define TPACPI_DBG_BRGHT 0x0020 248 #define TPACPI_DBG_MIXER 0x0040 249 250 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 251 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 252 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 253 254 255 /**************************************************************************** 256 * Driver-wide structs and misc. variables 257 */ 258 259 struct ibm_struct; 260 261 struct tp_acpi_drv_struct { 262 const struct acpi_device_id *hid; 263 struct acpi_driver *driver; 264 265 void (*notify) (struct ibm_struct *, u32); 266 acpi_handle *handle; 267 u32 type; 268 struct acpi_device *device; 269 }; 270 271 struct ibm_struct { 272 char *name; 273 274 int (*read) (struct seq_file *); 275 int (*write) (char *); 276 void (*exit) (void); 277 void (*resume) (void); 278 void (*suspend) (void); 279 void (*shutdown) (void); 280 281 struct list_head all_drivers; 282 283 struct tp_acpi_drv_struct *acpi; 284 285 struct { 286 u8 acpi_driver_registered:1; 287 u8 acpi_notify_installed:1; 288 u8 proc_created:1; 289 u8 init_called:1; 290 u8 experimental:1; 291 } flags; 292 }; 293 294 struct ibm_init_struct { 295 char param[32]; 296 297 int (*init) (struct ibm_init_struct *); 298 umode_t base_procfs_mode; 299 struct ibm_struct *data; 300 }; 301 302 static struct { 303 u32 bluetooth:1; 304 u32 hotkey:1; 305 u32 hotkey_mask:1; 306 u32 hotkey_wlsw:1; 307 enum { 308 TP_HOTKEY_TABLET_NONE = 0, 309 TP_HOTKEY_TABLET_USES_MHKG, 310 TP_HOTKEY_TABLET_USES_GMMS, 311 } hotkey_tablet; 312 u32 kbdlight:1; 313 u32 light:1; 314 u32 light_status:1; 315 u32 bright_acpimode:1; 316 u32 bright_unkfw:1; 317 u32 wan:1; 318 u32 uwb:1; 319 u32 fan_ctrl_status_undef:1; 320 u32 second_fan:1; 321 u32 second_fan_ctl:1; 322 u32 beep_needs_two_args:1; 323 u32 mixer_no_level_control:1; 324 u32 battery_force_primary:1; 325 u32 input_device_registered:1; 326 u32 platform_drv_registered:1; 327 u32 platform_drv_attrs_registered:1; 328 u32 sensors_pdrv_registered:1; 329 u32 sensors_pdrv_attrs_registered:1; 330 u32 sensors_pdev_attrs_registered:1; 331 u32 hotkey_poll_active:1; 332 u32 has_adaptive_kbd:1; 333 } tp_features; 334 335 static struct { 336 u16 hotkey_mask_ff:1; 337 u16 volume_ctrl_forbidden:1; 338 } tp_warned; 339 340 struct thinkpad_id_data { 341 unsigned int vendor; /* ThinkPad vendor: 342 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 343 344 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 345 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 346 347 u32 bios_model; /* 1Y = 0x3159, 0 = unknown */ 348 u32 ec_model; 349 u16 bios_release; /* 1ZETK1WW = 0x4b31, 0 = unknown */ 350 u16 ec_release; 351 352 char *model_str; /* ThinkPad T43 */ 353 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 354 }; 355 static struct thinkpad_id_data thinkpad_id; 356 357 static enum { 358 TPACPI_LIFE_INIT = 0, 359 TPACPI_LIFE_RUNNING, 360 TPACPI_LIFE_EXITING, 361 } tpacpi_lifecycle; 362 363 static int experimental; 364 static u32 dbg_level; 365 366 static struct workqueue_struct *tpacpi_wq; 367 368 enum led_status_t { 369 TPACPI_LED_OFF = 0, 370 TPACPI_LED_ON, 371 TPACPI_LED_BLINK, 372 }; 373 374 /* tpacpi LED class */ 375 struct tpacpi_led_classdev { 376 struct led_classdev led_classdev; 377 int led; 378 }; 379 380 /* brightness level capabilities */ 381 static unsigned int bright_maxlvl; /* 0 = unknown */ 382 383 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 384 static int dbg_wlswemul; 385 static bool tpacpi_wlsw_emulstate; 386 static int dbg_bluetoothemul; 387 static bool tpacpi_bluetooth_emulstate; 388 static int dbg_wwanemul; 389 static bool tpacpi_wwan_emulstate; 390 static int dbg_uwbemul; 391 static bool tpacpi_uwb_emulstate; 392 #endif 393 394 395 /************************************************************************* 396 * Debugging helpers 397 */ 398 399 #define dbg_printk(a_dbg_level, format, arg...) \ 400 do { \ 401 if (dbg_level & (a_dbg_level)) \ 402 printk(KERN_DEBUG pr_fmt("%s: " format), \ 403 __func__, ##arg); \ 404 } while (0) 405 406 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 407 #define vdbg_printk dbg_printk 408 static const char *str_supported(int is_supported); 409 #else 410 static inline const char *str_supported(int is_supported) { return ""; } 411 #define vdbg_printk(a_dbg_level, format, arg...) \ 412 do { if (0) no_printk(format, ##arg); } while (0) 413 #endif 414 415 static void tpacpi_log_usertask(const char * const what) 416 { 417 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 418 what, task_tgid_vnr(current)); 419 } 420 421 #define tpacpi_disclose_usertask(what, format, arg...) \ 422 do { \ 423 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 424 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 425 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 426 what, task_tgid_vnr(current), ## arg); \ 427 } \ 428 } while (0) 429 430 /* 431 * Quirk handling helpers 432 * 433 * ThinkPad IDs and versions seen in the field so far are 434 * two or three characters from the set [0-9A-Z], i.e. base 36. 435 * 436 * We use values well outside that range as specials. 437 */ 438 439 #define TPACPI_MATCH_ANY 0xffffffffU 440 #define TPACPI_MATCH_ANY_VERSION 0xffffU 441 #define TPACPI_MATCH_UNKNOWN 0U 442 443 /* TPID('1', 'Y') == 0x3159 */ 444 #define TPID(__c1, __c2) (((__c1) << 8) | (__c2)) 445 #define TPID3(__c1, __c2, __c3) (((__c1) << 16) | ((__c2) << 8) | (__c3)) 446 #define TPVER TPID 447 448 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 449 { .vendor = PCI_VENDOR_ID_IBM, \ 450 .bios = TPID(__id1, __id2), \ 451 .ec = TPACPI_MATCH_ANY, \ 452 .quirks = (__quirk) } 453 454 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 455 { .vendor = PCI_VENDOR_ID_LENOVO, \ 456 .bios = TPID(__id1, __id2), \ 457 .ec = TPACPI_MATCH_ANY, \ 458 .quirks = (__quirk) } 459 460 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \ 461 { .vendor = PCI_VENDOR_ID_LENOVO, \ 462 .bios = TPID3(__id1, __id2, __id3), \ 463 .ec = TPACPI_MATCH_ANY, \ 464 .quirks = (__quirk) } 465 466 #define TPACPI_QEC_IBM(__id1, __id2, __quirk) \ 467 { .vendor = PCI_VENDOR_ID_IBM, \ 468 .bios = TPACPI_MATCH_ANY, \ 469 .ec = TPID(__id1, __id2), \ 470 .quirks = (__quirk) } 471 472 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 473 { .vendor = PCI_VENDOR_ID_LENOVO, \ 474 .bios = TPACPI_MATCH_ANY, \ 475 .ec = TPID(__id1, __id2), \ 476 .quirks = (__quirk) } 477 478 struct tpacpi_quirk { 479 unsigned int vendor; 480 u32 bios; 481 u32 ec; 482 unsigned long quirks; 483 }; 484 485 /** 486 * tpacpi_check_quirks() - search BIOS/EC version on a list 487 * @qlist: array of &struct tpacpi_quirk 488 * @qlist_size: number of elements in @qlist 489 * 490 * Iterates over a quirks list until one is found that matches the 491 * ThinkPad's vendor, BIOS and EC model. 492 * 493 * Returns 0 if nothing matches, otherwise returns the quirks field of 494 * the matching &struct tpacpi_quirk entry. 495 * 496 * The match criteria is: vendor, ec and bios much match. 497 */ 498 static unsigned long __init tpacpi_check_quirks( 499 const struct tpacpi_quirk *qlist, 500 unsigned int qlist_size) 501 { 502 while (qlist_size) { 503 if ((qlist->vendor == thinkpad_id.vendor || 504 qlist->vendor == TPACPI_MATCH_ANY) && 505 (qlist->bios == thinkpad_id.bios_model || 506 qlist->bios == TPACPI_MATCH_ANY) && 507 (qlist->ec == thinkpad_id.ec_model || 508 qlist->ec == TPACPI_MATCH_ANY)) 509 return qlist->quirks; 510 511 qlist_size--; 512 qlist++; 513 } 514 return 0; 515 } 516 517 static inline bool __pure __init tpacpi_is_lenovo(void) 518 { 519 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 520 } 521 522 static inline bool __pure __init tpacpi_is_ibm(void) 523 { 524 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 525 } 526 527 /**************************************************************************** 528 **************************************************************************** 529 * 530 * ACPI Helpers and device model 531 * 532 **************************************************************************** 533 ****************************************************************************/ 534 535 /************************************************************************* 536 * ACPI basic handles 537 */ 538 539 static acpi_handle root_handle; 540 static acpi_handle ec_handle; 541 542 #define TPACPI_HANDLE(object, parent, paths...) \ 543 static acpi_handle object##_handle; \ 544 static const acpi_handle * const object##_parent __initconst = \ 545 &parent##_handle; \ 546 static char *object##_paths[] __initdata = { paths } 547 548 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 549 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 550 551 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 552 /* T4x, X31, X40 */ 553 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 554 "\\CMS", /* R40, R40e */ 555 ); /* all others */ 556 557 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 558 "^HKEY", /* R30, R31 */ 559 "HKEY", /* all others */ 560 ); /* 570 */ 561 562 /************************************************************************* 563 * ACPI helpers 564 */ 565 566 static int acpi_evalf(acpi_handle handle, 567 int *res, char *method, char *fmt, ...) 568 { 569 char *fmt0 = fmt; 570 struct acpi_object_list params; 571 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 572 struct acpi_buffer result, *resultp; 573 union acpi_object out_obj; 574 acpi_status status; 575 va_list ap; 576 char res_type; 577 int success; 578 int quiet; 579 580 if (!*fmt) { 581 pr_err("acpi_evalf() called with empty format\n"); 582 return 0; 583 } 584 585 if (*fmt == 'q') { 586 quiet = 1; 587 fmt++; 588 } else 589 quiet = 0; 590 591 res_type = *(fmt++); 592 593 params.count = 0; 594 params.pointer = &in_objs[0]; 595 596 va_start(ap, fmt); 597 while (*fmt) { 598 char c = *(fmt++); 599 switch (c) { 600 case 'd': /* int */ 601 in_objs[params.count].integer.value = va_arg(ap, int); 602 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 603 break; 604 /* add more types as needed */ 605 default: 606 pr_err("acpi_evalf() called with invalid format character '%c'\n", 607 c); 608 va_end(ap); 609 return 0; 610 } 611 } 612 va_end(ap); 613 614 if (res_type != 'v') { 615 result.length = sizeof(out_obj); 616 result.pointer = &out_obj; 617 resultp = &result; 618 } else 619 resultp = NULL; 620 621 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 622 623 switch (res_type) { 624 case 'd': /* int */ 625 success = (status == AE_OK && 626 out_obj.type == ACPI_TYPE_INTEGER); 627 if (success && res) 628 *res = out_obj.integer.value; 629 break; 630 case 'v': /* void */ 631 success = status == AE_OK; 632 break; 633 /* add more types as needed */ 634 default: 635 pr_err("acpi_evalf() called with invalid format character '%c'\n", 636 res_type); 637 return 0; 638 } 639 640 if (!success && !quiet) 641 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 642 method, fmt0, acpi_format_exception(status)); 643 644 return success; 645 } 646 647 static int acpi_ec_read(int i, u8 *p) 648 { 649 int v; 650 651 if (ecrd_handle) { 652 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 653 return 0; 654 *p = v; 655 } else { 656 if (ec_read(i, p) < 0) 657 return 0; 658 } 659 660 return 1; 661 } 662 663 static int acpi_ec_write(int i, u8 v) 664 { 665 if (ecwr_handle) { 666 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 667 return 0; 668 } else { 669 if (ec_write(i, v) < 0) 670 return 0; 671 } 672 673 return 1; 674 } 675 676 static int issue_thinkpad_cmos_command(int cmos_cmd) 677 { 678 if (!cmos_handle) 679 return -ENXIO; 680 681 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 682 return -EIO; 683 684 return 0; 685 } 686 687 /************************************************************************* 688 * ACPI device model 689 */ 690 691 #define TPACPI_ACPIHANDLE_INIT(object) \ 692 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 693 object##_paths, ARRAY_SIZE(object##_paths)) 694 695 static void __init drv_acpi_handle_init(const char *name, 696 acpi_handle *handle, const acpi_handle parent, 697 char **paths, const int num_paths) 698 { 699 int i; 700 acpi_status status; 701 702 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 703 name); 704 705 for (i = 0; i < num_paths; i++) { 706 status = acpi_get_handle(parent, paths[i], handle); 707 if (ACPI_SUCCESS(status)) { 708 dbg_printk(TPACPI_DBG_INIT, 709 "Found ACPI handle %s for %s\n", 710 paths[i], name); 711 return; 712 } 713 } 714 715 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 716 name); 717 *handle = NULL; 718 } 719 720 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 721 u32 level, void *context, void **return_value) 722 { 723 struct acpi_device *dev; 724 if (!strcmp(context, "video")) { 725 if (acpi_bus_get_device(handle, &dev)) 726 return AE_OK; 727 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 728 return AE_OK; 729 } 730 731 *(acpi_handle *)return_value = handle; 732 733 return AE_CTRL_TERMINATE; 734 } 735 736 static void __init tpacpi_acpi_handle_locate(const char *name, 737 const char *hid, 738 acpi_handle *handle) 739 { 740 acpi_status status; 741 acpi_handle device_found; 742 743 BUG_ON(!name || !handle); 744 vdbg_printk(TPACPI_DBG_INIT, 745 "trying to locate ACPI handle for %s, using HID %s\n", 746 name, hid ? hid : "NULL"); 747 748 memset(&device_found, 0, sizeof(device_found)); 749 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 750 (void *)name, &device_found); 751 752 *handle = NULL; 753 754 if (ACPI_SUCCESS(status)) { 755 *handle = device_found; 756 dbg_printk(TPACPI_DBG_INIT, 757 "Found ACPI handle for %s\n", name); 758 } else { 759 vdbg_printk(TPACPI_DBG_INIT, 760 "Could not locate an ACPI handle for %s: %s\n", 761 name, acpi_format_exception(status)); 762 } 763 } 764 765 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 766 { 767 struct ibm_struct *ibm = data; 768 769 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 770 return; 771 772 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 773 return; 774 775 ibm->acpi->notify(ibm, event); 776 } 777 778 static int __init setup_acpi_notify(struct ibm_struct *ibm) 779 { 780 acpi_status status; 781 int rc; 782 783 BUG_ON(!ibm->acpi); 784 785 if (!*ibm->acpi->handle) 786 return 0; 787 788 vdbg_printk(TPACPI_DBG_INIT, 789 "setting up ACPI notify for %s\n", ibm->name); 790 791 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 792 if (rc < 0) { 793 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 794 return -ENODEV; 795 } 796 797 ibm->acpi->device->driver_data = ibm; 798 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 799 TPACPI_ACPI_EVENT_PREFIX, 800 ibm->name); 801 802 status = acpi_install_notify_handler(*ibm->acpi->handle, 803 ibm->acpi->type, dispatch_acpi_notify, ibm); 804 if (ACPI_FAILURE(status)) { 805 if (status == AE_ALREADY_EXISTS) { 806 pr_notice("another device driver is already handling %s events\n", 807 ibm->name); 808 } else { 809 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 810 ibm->name, acpi_format_exception(status)); 811 } 812 return -ENODEV; 813 } 814 ibm->flags.acpi_notify_installed = 1; 815 return 0; 816 } 817 818 static int __init tpacpi_device_add(struct acpi_device *device) 819 { 820 return 0; 821 } 822 823 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 824 { 825 int rc; 826 827 dbg_printk(TPACPI_DBG_INIT, 828 "registering %s as an ACPI driver\n", ibm->name); 829 830 BUG_ON(!ibm->acpi); 831 832 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 833 if (!ibm->acpi->driver) { 834 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 835 return -ENOMEM; 836 } 837 838 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 839 ibm->acpi->driver->ids = ibm->acpi->hid; 840 841 ibm->acpi->driver->ops.add = &tpacpi_device_add; 842 843 rc = acpi_bus_register_driver(ibm->acpi->driver); 844 if (rc < 0) { 845 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 846 ibm->name, rc); 847 kfree(ibm->acpi->driver); 848 ibm->acpi->driver = NULL; 849 } else if (!rc) 850 ibm->flags.acpi_driver_registered = 1; 851 852 return rc; 853 } 854 855 856 /**************************************************************************** 857 **************************************************************************** 858 * 859 * Procfs Helpers 860 * 861 **************************************************************************** 862 ****************************************************************************/ 863 864 static int dispatch_proc_show(struct seq_file *m, void *v) 865 { 866 struct ibm_struct *ibm = m->private; 867 868 if (!ibm || !ibm->read) 869 return -EINVAL; 870 return ibm->read(m); 871 } 872 873 static int dispatch_proc_open(struct inode *inode, struct file *file) 874 { 875 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 876 } 877 878 static ssize_t dispatch_proc_write(struct file *file, 879 const char __user *userbuf, 880 size_t count, loff_t *pos) 881 { 882 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 883 char *kernbuf; 884 int ret; 885 886 if (!ibm || !ibm->write) 887 return -EINVAL; 888 889 kernbuf = strndup_user(userbuf, PAGE_SIZE); 890 if (IS_ERR(kernbuf)) 891 return PTR_ERR(kernbuf); 892 893 ret = ibm->write(kernbuf); 894 if (ret == 0) 895 ret = count; 896 897 kfree(kernbuf); 898 899 return ret; 900 } 901 902 static const struct proc_ops dispatch_proc_ops = { 903 .proc_open = dispatch_proc_open, 904 .proc_read = seq_read, 905 .proc_lseek = seq_lseek, 906 .proc_release = single_release, 907 .proc_write = dispatch_proc_write, 908 }; 909 910 /**************************************************************************** 911 **************************************************************************** 912 * 913 * Device model: input, hwmon and platform 914 * 915 **************************************************************************** 916 ****************************************************************************/ 917 918 static struct platform_device *tpacpi_pdev; 919 static struct platform_device *tpacpi_sensors_pdev; 920 static struct device *tpacpi_hwmon; 921 static struct input_dev *tpacpi_inputdev; 922 static struct mutex tpacpi_inputdev_send_mutex; 923 static LIST_HEAD(tpacpi_all_drivers); 924 925 #ifdef CONFIG_PM_SLEEP 926 static int tpacpi_suspend_handler(struct device *dev) 927 { 928 struct ibm_struct *ibm, *itmp; 929 930 list_for_each_entry_safe(ibm, itmp, 931 &tpacpi_all_drivers, 932 all_drivers) { 933 if (ibm->suspend) 934 (ibm->suspend)(); 935 } 936 937 return 0; 938 } 939 940 static int tpacpi_resume_handler(struct device *dev) 941 { 942 struct ibm_struct *ibm, *itmp; 943 944 list_for_each_entry_safe(ibm, itmp, 945 &tpacpi_all_drivers, 946 all_drivers) { 947 if (ibm->resume) 948 (ibm->resume)(); 949 } 950 951 return 0; 952 } 953 #endif 954 955 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 956 tpacpi_suspend_handler, tpacpi_resume_handler); 957 958 static void tpacpi_shutdown_handler(struct platform_device *pdev) 959 { 960 struct ibm_struct *ibm, *itmp; 961 962 list_for_each_entry_safe(ibm, itmp, 963 &tpacpi_all_drivers, 964 all_drivers) { 965 if (ibm->shutdown) 966 (ibm->shutdown)(); 967 } 968 } 969 970 static struct platform_driver tpacpi_pdriver = { 971 .driver = { 972 .name = TPACPI_DRVR_NAME, 973 .pm = &tpacpi_pm, 974 }, 975 .shutdown = tpacpi_shutdown_handler, 976 }; 977 978 static struct platform_driver tpacpi_hwmon_pdriver = { 979 .driver = { 980 .name = TPACPI_HWMON_DRVR_NAME, 981 }, 982 }; 983 984 /************************************************************************* 985 * sysfs support helpers 986 */ 987 988 struct attribute_set { 989 unsigned int members, max_members; 990 struct attribute_group group; 991 }; 992 993 struct attribute_set_obj { 994 struct attribute_set s; 995 struct attribute *a; 996 } __attribute__((packed)); 997 998 static struct attribute_set *create_attr_set(unsigned int max_members, 999 const char *name) 1000 { 1001 struct attribute_set_obj *sobj; 1002 1003 if (max_members == 0) 1004 return NULL; 1005 1006 /* Allocates space for implicit NULL at the end too */ 1007 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1008 max_members * sizeof(struct attribute *), 1009 GFP_KERNEL); 1010 if (!sobj) 1011 return NULL; 1012 sobj->s.max_members = max_members; 1013 sobj->s.group.attrs = &sobj->a; 1014 sobj->s.group.name = name; 1015 1016 return &sobj->s; 1017 } 1018 1019 #define destroy_attr_set(_set) \ 1020 kfree(_set); 1021 1022 /* not multi-threaded safe, use it in a single thread per set */ 1023 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1024 { 1025 if (!s || !attr) 1026 return -EINVAL; 1027 1028 if (s->members >= s->max_members) 1029 return -ENOMEM; 1030 1031 s->group.attrs[s->members] = attr; 1032 s->members++; 1033 1034 return 0; 1035 } 1036 1037 static int add_many_to_attr_set(struct attribute_set *s, 1038 struct attribute **attr, 1039 unsigned int count) 1040 { 1041 int i, res; 1042 1043 for (i = 0; i < count; i++) { 1044 res = add_to_attr_set(s, attr[i]); 1045 if (res) 1046 return res; 1047 } 1048 1049 return 0; 1050 } 1051 1052 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1053 { 1054 sysfs_remove_group(kobj, &s->group); 1055 destroy_attr_set(s); 1056 } 1057 1058 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1059 sysfs_create_group(_kobj, &_attr_set->group) 1060 1061 static int parse_strtoul(const char *buf, 1062 unsigned long max, unsigned long *value) 1063 { 1064 char *endp; 1065 1066 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1067 endp = skip_spaces(endp); 1068 if (*endp || *value > max) 1069 return -EINVAL; 1070 1071 return 0; 1072 } 1073 1074 static void tpacpi_disable_brightness_delay(void) 1075 { 1076 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1077 pr_notice("ACPI backlight control delay disabled\n"); 1078 } 1079 1080 static void printk_deprecated_attribute(const char * const what, 1081 const char * const details) 1082 { 1083 tpacpi_log_usertask("deprecated sysfs attribute"); 1084 pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n", 1085 what, details); 1086 } 1087 1088 /************************************************************************* 1089 * rfkill and radio control support helpers 1090 */ 1091 1092 /* 1093 * ThinkPad-ACPI firmware handling model: 1094 * 1095 * WLSW (master wireless switch) is event-driven, and is common to all 1096 * firmware-controlled radios. It cannot be controlled, just monitored, 1097 * as expected. It overrides all radio state in firmware 1098 * 1099 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1100 * (TODO: verify how WLSW interacts with the returned radio state). 1101 * 1102 * The only time there are shadow radio state changes, is when 1103 * masked-off hotkeys are used. 1104 */ 1105 1106 /* 1107 * Internal driver API for radio state: 1108 * 1109 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1110 * bool: true means radio blocked (off) 1111 */ 1112 enum tpacpi_rfkill_state { 1113 TPACPI_RFK_RADIO_OFF = 0, 1114 TPACPI_RFK_RADIO_ON 1115 }; 1116 1117 /* rfkill switches */ 1118 enum tpacpi_rfk_id { 1119 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1120 TPACPI_RFK_WWAN_SW_ID, 1121 TPACPI_RFK_UWB_SW_ID, 1122 TPACPI_RFK_SW_MAX 1123 }; 1124 1125 static const char *tpacpi_rfkill_names[] = { 1126 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1127 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1128 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1129 [TPACPI_RFK_SW_MAX] = NULL 1130 }; 1131 1132 /* ThinkPad-ACPI rfkill subdriver */ 1133 struct tpacpi_rfk { 1134 struct rfkill *rfkill; 1135 enum tpacpi_rfk_id id; 1136 const struct tpacpi_rfk_ops *ops; 1137 }; 1138 1139 struct tpacpi_rfk_ops { 1140 /* firmware interface */ 1141 int (*get_status)(void); 1142 int (*set_status)(const enum tpacpi_rfkill_state); 1143 }; 1144 1145 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1146 1147 /* Query FW and update rfkill sw state for a given rfkill switch */ 1148 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1149 { 1150 int status; 1151 1152 if (!tp_rfk) 1153 return -ENODEV; 1154 1155 status = (tp_rfk->ops->get_status)(); 1156 if (status < 0) 1157 return status; 1158 1159 rfkill_set_sw_state(tp_rfk->rfkill, 1160 (status == TPACPI_RFK_RADIO_OFF)); 1161 1162 return status; 1163 } 1164 1165 /* Query FW and update rfkill sw state for all rfkill switches */ 1166 static void tpacpi_rfk_update_swstate_all(void) 1167 { 1168 unsigned int i; 1169 1170 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1171 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1172 } 1173 1174 /* 1175 * Sync the HW-blocking state of all rfkill switches, 1176 * do notice it causes the rfkill core to schedule uevents 1177 */ 1178 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1179 { 1180 unsigned int i; 1181 struct tpacpi_rfk *tp_rfk; 1182 1183 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1184 tp_rfk = tpacpi_rfkill_switches[i]; 1185 if (tp_rfk) { 1186 if (rfkill_set_hw_state(tp_rfk->rfkill, 1187 blocked)) { 1188 /* ignore -- we track sw block */ 1189 } 1190 } 1191 } 1192 } 1193 1194 /* Call to get the WLSW state from the firmware */ 1195 static int hotkey_get_wlsw(void); 1196 1197 /* Call to query WLSW state and update all rfkill switches */ 1198 static bool tpacpi_rfk_check_hwblock_state(void) 1199 { 1200 int res = hotkey_get_wlsw(); 1201 int hw_blocked; 1202 1203 /* When unknown or unsupported, we have to assume it is unblocked */ 1204 if (res < 0) 1205 return false; 1206 1207 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1208 tpacpi_rfk_update_hwblock_state(hw_blocked); 1209 1210 return hw_blocked; 1211 } 1212 1213 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1214 { 1215 struct tpacpi_rfk *tp_rfk = data; 1216 int res; 1217 1218 dbg_printk(TPACPI_DBG_RFKILL, 1219 "request to change radio state to %s\n", 1220 blocked ? "blocked" : "unblocked"); 1221 1222 /* try to set radio state */ 1223 res = (tp_rfk->ops->set_status)(blocked ? 1224 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1225 1226 /* and update the rfkill core with whatever the FW really did */ 1227 tpacpi_rfk_update_swstate(tp_rfk); 1228 1229 return (res < 0) ? res : 0; 1230 } 1231 1232 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1233 .set_block = tpacpi_rfk_hook_set_block, 1234 }; 1235 1236 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1237 const struct tpacpi_rfk_ops *tp_rfkops, 1238 const enum rfkill_type rfktype, 1239 const char *name, 1240 const bool set_default) 1241 { 1242 struct tpacpi_rfk *atp_rfk; 1243 int res; 1244 bool sw_state = false; 1245 bool hw_state; 1246 int sw_status; 1247 1248 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1249 1250 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1251 if (atp_rfk) 1252 atp_rfk->rfkill = rfkill_alloc(name, 1253 &tpacpi_pdev->dev, 1254 rfktype, 1255 &tpacpi_rfk_rfkill_ops, 1256 atp_rfk); 1257 if (!atp_rfk || !atp_rfk->rfkill) { 1258 pr_err("failed to allocate memory for rfkill class\n"); 1259 kfree(atp_rfk); 1260 return -ENOMEM; 1261 } 1262 1263 atp_rfk->id = id; 1264 atp_rfk->ops = tp_rfkops; 1265 1266 sw_status = (tp_rfkops->get_status)(); 1267 if (sw_status < 0) { 1268 pr_err("failed to read initial state for %s, error %d\n", 1269 name, sw_status); 1270 } else { 1271 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1272 if (set_default) { 1273 /* try to keep the initial state, since we ask the 1274 * firmware to preserve it across S5 in NVRAM */ 1275 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1276 } 1277 } 1278 hw_state = tpacpi_rfk_check_hwblock_state(); 1279 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1280 1281 res = rfkill_register(atp_rfk->rfkill); 1282 if (res < 0) { 1283 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1284 rfkill_destroy(atp_rfk->rfkill); 1285 kfree(atp_rfk); 1286 return res; 1287 } 1288 1289 tpacpi_rfkill_switches[id] = atp_rfk; 1290 1291 pr_info("rfkill switch %s: radio is %sblocked\n", 1292 name, (sw_state || hw_state) ? "" : "un"); 1293 return 0; 1294 } 1295 1296 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1297 { 1298 struct tpacpi_rfk *tp_rfk; 1299 1300 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1301 1302 tp_rfk = tpacpi_rfkill_switches[id]; 1303 if (tp_rfk) { 1304 rfkill_unregister(tp_rfk->rfkill); 1305 rfkill_destroy(tp_rfk->rfkill); 1306 tpacpi_rfkill_switches[id] = NULL; 1307 kfree(tp_rfk); 1308 } 1309 } 1310 1311 static void printk_deprecated_rfkill_attribute(const char * const what) 1312 { 1313 printk_deprecated_attribute(what, 1314 "Please switch to generic rfkill before year 2010"); 1315 } 1316 1317 /* sysfs <radio> enable ------------------------------------------------ */ 1318 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1319 struct device_attribute *attr, 1320 char *buf) 1321 { 1322 int status; 1323 1324 printk_deprecated_rfkill_attribute(attr->attr.name); 1325 1326 /* This is in the ABI... */ 1327 if (tpacpi_rfk_check_hwblock_state()) { 1328 status = TPACPI_RFK_RADIO_OFF; 1329 } else { 1330 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1331 if (status < 0) 1332 return status; 1333 } 1334 1335 return snprintf(buf, PAGE_SIZE, "%d\n", 1336 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1337 } 1338 1339 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1340 struct device_attribute *attr, 1341 const char *buf, size_t count) 1342 { 1343 unsigned long t; 1344 int res; 1345 1346 printk_deprecated_rfkill_attribute(attr->attr.name); 1347 1348 if (parse_strtoul(buf, 1, &t)) 1349 return -EINVAL; 1350 1351 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1352 1353 /* This is in the ABI... */ 1354 if (tpacpi_rfk_check_hwblock_state() && !!t) 1355 return -EPERM; 1356 1357 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1358 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1359 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1360 1361 return (res < 0) ? res : count; 1362 } 1363 1364 /* procfs -------------------------------------------------------------- */ 1365 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1366 { 1367 if (id >= TPACPI_RFK_SW_MAX) 1368 seq_printf(m, "status:\t\tnot supported\n"); 1369 else { 1370 int status; 1371 1372 /* This is in the ABI... */ 1373 if (tpacpi_rfk_check_hwblock_state()) { 1374 status = TPACPI_RFK_RADIO_OFF; 1375 } else { 1376 status = tpacpi_rfk_update_swstate( 1377 tpacpi_rfkill_switches[id]); 1378 if (status < 0) 1379 return status; 1380 } 1381 1382 seq_printf(m, "status:\t\t%s\n", 1383 (status == TPACPI_RFK_RADIO_ON) ? 1384 "enabled" : "disabled"); 1385 seq_printf(m, "commands:\tenable, disable\n"); 1386 } 1387 1388 return 0; 1389 } 1390 1391 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1392 { 1393 char *cmd; 1394 int status = -1; 1395 int res = 0; 1396 1397 if (id >= TPACPI_RFK_SW_MAX) 1398 return -ENODEV; 1399 1400 while ((cmd = strsep(&buf, ","))) { 1401 if (strlencmp(cmd, "enable") == 0) 1402 status = TPACPI_RFK_RADIO_ON; 1403 else if (strlencmp(cmd, "disable") == 0) 1404 status = TPACPI_RFK_RADIO_OFF; 1405 else 1406 return -EINVAL; 1407 } 1408 1409 if (status != -1) { 1410 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1411 (status == TPACPI_RFK_RADIO_ON) ? 1412 "enable" : "disable", 1413 tpacpi_rfkill_names[id]); 1414 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1415 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1416 } 1417 1418 return res; 1419 } 1420 1421 /************************************************************************* 1422 * thinkpad-acpi driver attributes 1423 */ 1424 1425 /* interface_version --------------------------------------------------- */ 1426 static ssize_t interface_version_show(struct device_driver *drv, char *buf) 1427 { 1428 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1429 } 1430 static DRIVER_ATTR_RO(interface_version); 1431 1432 /* debug_level --------------------------------------------------------- */ 1433 static ssize_t debug_level_show(struct device_driver *drv, char *buf) 1434 { 1435 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1436 } 1437 1438 static ssize_t debug_level_store(struct device_driver *drv, const char *buf, 1439 size_t count) 1440 { 1441 unsigned long t; 1442 1443 if (parse_strtoul(buf, 0xffff, &t)) 1444 return -EINVAL; 1445 1446 dbg_level = t; 1447 1448 return count; 1449 } 1450 static DRIVER_ATTR_RW(debug_level); 1451 1452 /* version ------------------------------------------------------------- */ 1453 static ssize_t version_show(struct device_driver *drv, char *buf) 1454 { 1455 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1456 TPACPI_DESC, TPACPI_VERSION); 1457 } 1458 static DRIVER_ATTR_RO(version); 1459 1460 /* --------------------------------------------------------------------- */ 1461 1462 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1463 1464 /* wlsw_emulstate ------------------------------------------------------ */ 1465 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf) 1466 { 1467 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1468 } 1469 1470 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf, 1471 size_t count) 1472 { 1473 unsigned long t; 1474 1475 if (parse_strtoul(buf, 1, &t)) 1476 return -EINVAL; 1477 1478 if (tpacpi_wlsw_emulstate != !!t) { 1479 tpacpi_wlsw_emulstate = !!t; 1480 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1481 } 1482 1483 return count; 1484 } 1485 static DRIVER_ATTR_RW(wlsw_emulstate); 1486 1487 /* bluetooth_emulstate ------------------------------------------------- */ 1488 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf) 1489 { 1490 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1491 } 1492 1493 static ssize_t bluetooth_emulstate_store(struct device_driver *drv, 1494 const char *buf, size_t count) 1495 { 1496 unsigned long t; 1497 1498 if (parse_strtoul(buf, 1, &t)) 1499 return -EINVAL; 1500 1501 tpacpi_bluetooth_emulstate = !!t; 1502 1503 return count; 1504 } 1505 static DRIVER_ATTR_RW(bluetooth_emulstate); 1506 1507 /* wwan_emulstate ------------------------------------------------- */ 1508 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf) 1509 { 1510 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1511 } 1512 1513 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf, 1514 size_t count) 1515 { 1516 unsigned long t; 1517 1518 if (parse_strtoul(buf, 1, &t)) 1519 return -EINVAL; 1520 1521 tpacpi_wwan_emulstate = !!t; 1522 1523 return count; 1524 } 1525 static DRIVER_ATTR_RW(wwan_emulstate); 1526 1527 /* uwb_emulstate ------------------------------------------------- */ 1528 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf) 1529 { 1530 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1531 } 1532 1533 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf, 1534 size_t count) 1535 { 1536 unsigned long t; 1537 1538 if (parse_strtoul(buf, 1, &t)) 1539 return -EINVAL; 1540 1541 tpacpi_uwb_emulstate = !!t; 1542 1543 return count; 1544 } 1545 static DRIVER_ATTR_RW(uwb_emulstate); 1546 #endif 1547 1548 /* --------------------------------------------------------------------- */ 1549 1550 static struct driver_attribute *tpacpi_driver_attributes[] = { 1551 &driver_attr_debug_level, &driver_attr_version, 1552 &driver_attr_interface_version, 1553 }; 1554 1555 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1556 { 1557 int i, res; 1558 1559 i = 0; 1560 res = 0; 1561 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1562 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1563 i++; 1564 } 1565 1566 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1567 if (!res && dbg_wlswemul) 1568 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1569 if (!res && dbg_bluetoothemul) 1570 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1571 if (!res && dbg_wwanemul) 1572 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1573 if (!res && dbg_uwbemul) 1574 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1575 #endif 1576 1577 return res; 1578 } 1579 1580 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1581 { 1582 int i; 1583 1584 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1585 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1586 1587 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1588 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1589 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1590 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1591 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1592 #endif 1593 } 1594 1595 /************************************************************************* 1596 * Firmware Data 1597 */ 1598 1599 /* 1600 * Table of recommended minimum BIOS versions 1601 * 1602 * Reasons for listing: 1603 * 1. Stable BIOS, listed because the unknown amount of 1604 * bugs and bad ACPI behaviour on older versions 1605 * 1606 * 2. BIOS or EC fw with known bugs that trigger on Linux 1607 * 1608 * 3. BIOS with known reduced functionality in older versions 1609 * 1610 * We recommend the latest BIOS and EC version. 1611 * We only support the latest BIOS and EC fw version as a rule. 1612 * 1613 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1614 * Information from users in ThinkWiki 1615 * 1616 * WARNING: we use this table also to detect that the machine is 1617 * a ThinkPad in some cases, so don't remove entries lightly. 1618 */ 1619 1620 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1621 { .vendor = (__v), \ 1622 .bios = TPID(__id1, __id2), \ 1623 .ec = TPACPI_MATCH_ANY, \ 1624 .quirks = TPACPI_MATCH_ANY_VERSION << 16 \ 1625 | TPVER(__bv1, __bv2) } 1626 1627 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1628 __eid, __ev1, __ev2) \ 1629 { .vendor = (__v), \ 1630 .bios = TPID(__bid1, __bid2), \ 1631 .ec = __eid, \ 1632 .quirks = TPVER(__ev1, __ev2) << 16 \ 1633 | TPVER(__bv1, __bv2) } 1634 1635 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1636 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1637 1638 /* Outdated IBM BIOSes often lack the EC id string */ 1639 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1640 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1641 __bv1, __bv2, TPID(__id1, __id2), \ 1642 __ev1, __ev2), \ 1643 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1644 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1645 __ev1, __ev2) 1646 1647 /* Outdated IBM BIOSes often lack the EC id string */ 1648 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1649 __eid1, __eid2, __ev1, __ev2) \ 1650 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1651 __bv1, __bv2, TPID(__eid1, __eid2), \ 1652 __ev1, __ev2), \ 1653 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1654 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1655 __ev1, __ev2) 1656 1657 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1658 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1659 1660 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1661 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1662 __bv1, __bv2, TPID(__id1, __id2), \ 1663 __ev1, __ev2) 1664 1665 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1666 __eid1, __eid2, __ev1, __ev2) \ 1667 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1668 __bv1, __bv2, TPID(__eid1, __eid2), \ 1669 __ev1, __ev2) 1670 1671 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1672 /* Numeric models ------------------ */ 1673 /* FW MODEL BIOS VERS */ 1674 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1675 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1676 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1677 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1678 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1679 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1680 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1681 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1682 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1683 1684 /* A-series ------------------------- */ 1685 /* FW MODEL BIOS VERS EC VERS */ 1686 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1687 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1688 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1689 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1690 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1691 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1692 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1693 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1694 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1695 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1696 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1697 1698 /* G-series ------------------------- */ 1699 /* FW MODEL BIOS VERS */ 1700 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1701 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1702 1703 /* R-series, T-series --------------- */ 1704 /* FW MODEL BIOS VERS EC VERS */ 1705 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1706 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1707 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1708 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1709 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1710 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1711 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1712 T40/p, T41/p, T42/p (1) */ 1713 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1714 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1715 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1716 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1717 1718 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1719 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1720 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1721 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1722 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1723 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1724 1725 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1726 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1727 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1728 1729 /* BIOS FW BIOS VERS EC FW EC VERS */ 1730 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1731 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1732 1733 /* X-series ------------------------- */ 1734 /* FW MODEL BIOS VERS EC VERS */ 1735 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1736 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1737 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1738 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1739 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1740 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1741 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1742 1743 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1744 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1745 1746 /* (0) - older versions lack DMI EC fw string and functionality */ 1747 /* (1) - older versions known to lack functionality */ 1748 }; 1749 1750 #undef TPV_QL1 1751 #undef TPV_QL0 1752 #undef TPV_QI2 1753 #undef TPV_QI1 1754 #undef TPV_QI0 1755 #undef TPV_Q_X 1756 #undef TPV_Q 1757 1758 static void __init tpacpi_check_outdated_fw(void) 1759 { 1760 unsigned long fwvers; 1761 u16 ec_version, bios_version; 1762 1763 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1764 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1765 1766 if (!fwvers) 1767 return; 1768 1769 bios_version = fwvers & 0xffffU; 1770 ec_version = (fwvers >> 16) & 0xffffU; 1771 1772 /* note that unknown versions are set to 0x0000 and we use that */ 1773 if ((bios_version > thinkpad_id.bios_release) || 1774 (ec_version > thinkpad_id.ec_release && 1775 ec_version != TPACPI_MATCH_ANY_VERSION)) { 1776 /* 1777 * The changelogs would let us track down the exact 1778 * reason, but it is just too much of a pain to track 1779 * it. We only list BIOSes that are either really 1780 * broken, or really stable to begin with, so it is 1781 * best if the user upgrades the firmware anyway. 1782 */ 1783 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1784 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n"); 1785 } 1786 } 1787 1788 static bool __init tpacpi_is_fw_known(void) 1789 { 1790 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1791 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1792 } 1793 1794 /**************************************************************************** 1795 **************************************************************************** 1796 * 1797 * Subdrivers 1798 * 1799 **************************************************************************** 1800 ****************************************************************************/ 1801 1802 /************************************************************************* 1803 * thinkpad-acpi metadata subdriver 1804 */ 1805 1806 static int thinkpad_acpi_driver_read(struct seq_file *m) 1807 { 1808 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1809 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1810 return 0; 1811 } 1812 1813 static struct ibm_struct thinkpad_acpi_driver_data = { 1814 .name = "driver", 1815 .read = thinkpad_acpi_driver_read, 1816 }; 1817 1818 /************************************************************************* 1819 * Hotkey subdriver 1820 */ 1821 1822 /* 1823 * ThinkPad firmware event model 1824 * 1825 * The ThinkPad firmware has two main event interfaces: normal ACPI 1826 * notifications (which follow the ACPI standard), and a private event 1827 * interface. 1828 * 1829 * The private event interface also issues events for the hotkeys. As 1830 * the driver gained features, the event handling code ended up being 1831 * built around the hotkey subdriver. This will need to be refactored 1832 * to a more formal event API eventually. 1833 * 1834 * Some "hotkeys" are actually supposed to be used as event reports, 1835 * such as "brightness has changed", "volume has changed", depending on 1836 * the ThinkPad model and how the firmware is operating. 1837 * 1838 * Unlike other classes, hotkey-class events have mask/unmask control on 1839 * non-ancient firmware. However, how it behaves changes a lot with the 1840 * firmware model and version. 1841 */ 1842 1843 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1844 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1845 TP_ACPI_HOTKEYSCAN_FNF2, 1846 TP_ACPI_HOTKEYSCAN_FNF3, 1847 TP_ACPI_HOTKEYSCAN_FNF4, 1848 TP_ACPI_HOTKEYSCAN_FNF5, 1849 TP_ACPI_HOTKEYSCAN_FNF6, 1850 TP_ACPI_HOTKEYSCAN_FNF7, 1851 TP_ACPI_HOTKEYSCAN_FNF8, 1852 TP_ACPI_HOTKEYSCAN_FNF9, 1853 TP_ACPI_HOTKEYSCAN_FNF10, 1854 TP_ACPI_HOTKEYSCAN_FNF11, 1855 TP_ACPI_HOTKEYSCAN_FNF12, 1856 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1857 TP_ACPI_HOTKEYSCAN_FNINSERT, 1858 TP_ACPI_HOTKEYSCAN_FNDELETE, 1859 TP_ACPI_HOTKEYSCAN_FNHOME, 1860 TP_ACPI_HOTKEYSCAN_FNEND, 1861 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1862 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1863 TP_ACPI_HOTKEYSCAN_FNSPACE, 1864 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1865 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1866 TP_ACPI_HOTKEYSCAN_MUTE, 1867 TP_ACPI_HOTKEYSCAN_THINKPAD, 1868 TP_ACPI_HOTKEYSCAN_UNK1, 1869 TP_ACPI_HOTKEYSCAN_UNK2, 1870 TP_ACPI_HOTKEYSCAN_UNK3, 1871 TP_ACPI_HOTKEYSCAN_UNK4, 1872 TP_ACPI_HOTKEYSCAN_UNK5, 1873 TP_ACPI_HOTKEYSCAN_UNK6, 1874 TP_ACPI_HOTKEYSCAN_UNK7, 1875 TP_ACPI_HOTKEYSCAN_UNK8, 1876 1877 /* Adaptive keyboard keycodes */ 1878 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1879 TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1880 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1881 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1882 TP_ACPI_HOTKEYSCAN_CLOUD, 1883 TP_ACPI_HOTKEYSCAN_UNK9, 1884 TP_ACPI_HOTKEYSCAN_VOICE, 1885 TP_ACPI_HOTKEYSCAN_UNK10, 1886 TP_ACPI_HOTKEYSCAN_GESTURES, 1887 TP_ACPI_HOTKEYSCAN_UNK11, 1888 TP_ACPI_HOTKEYSCAN_UNK12, 1889 TP_ACPI_HOTKEYSCAN_UNK13, 1890 TP_ACPI_HOTKEYSCAN_CONFIG, 1891 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1892 TP_ACPI_HOTKEYSCAN_RELOAD, 1893 TP_ACPI_HOTKEYSCAN_BACK, 1894 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1895 TP_ACPI_HOTKEYSCAN_MIC_UP, 1896 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1897 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1898 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1899 1900 /* Lenovo extended keymap, starting at 0x1300 */ 1901 TP_ACPI_HOTKEYSCAN_EXTENDED_START, 1902 /* first new observed key (star, favorites) is 0x1311 */ 1903 TP_ACPI_HOTKEYSCAN_STAR = 69, 1904 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2, 1905 TP_ACPI_HOTKEYSCAN_CALCULATOR, 1906 TP_ACPI_HOTKEYSCAN_BLUETOOTH, 1907 TP_ACPI_HOTKEYSCAN_KEYBOARD, 1908 1909 /* Hotkey keymap size */ 1910 TPACPI_HOTKEY_MAP_LEN 1911 }; 1912 1913 enum { /* Keys/events available through NVRAM polling */ 1914 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1915 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1916 }; 1917 1918 enum { /* Positions of some of the keys in hotkey masks */ 1919 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1920 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1921 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1922 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1923 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1924 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1925 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1926 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1927 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1928 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1929 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1930 }; 1931 1932 enum { /* NVRAM to ACPI HKEY group map */ 1933 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1934 TP_ACPI_HKEY_ZOOM_MASK | 1935 TP_ACPI_HKEY_DISPSWTCH_MASK | 1936 TP_ACPI_HKEY_HIBERNATE_MASK, 1937 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1938 TP_ACPI_HKEY_BRGHTDWN_MASK, 1939 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1940 TP_ACPI_HKEY_VOLDWN_MASK | 1941 TP_ACPI_HKEY_MUTE_MASK, 1942 }; 1943 1944 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1945 struct tp_nvram_state { 1946 u16 thinkpad_toggle:1; 1947 u16 zoom_toggle:1; 1948 u16 display_toggle:1; 1949 u16 thinklight_toggle:1; 1950 u16 hibernate_toggle:1; 1951 u16 displayexp_toggle:1; 1952 u16 display_state:1; 1953 u16 brightness_toggle:1; 1954 u16 volume_toggle:1; 1955 u16 mute:1; 1956 1957 u8 brightness_level; 1958 u8 volume_level; 1959 }; 1960 1961 /* kthread for the hotkey poller */ 1962 static struct task_struct *tpacpi_hotkey_task; 1963 1964 /* 1965 * Acquire mutex to write poller control variables as an 1966 * atomic block. 1967 * 1968 * Increment hotkey_config_change when changing them if you 1969 * want the kthread to forget old state. 1970 * 1971 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1972 */ 1973 static struct mutex hotkey_thread_data_mutex; 1974 static unsigned int hotkey_config_change; 1975 1976 /* 1977 * hotkey poller control variables 1978 * 1979 * Must be atomic or readers will also need to acquire mutex 1980 * 1981 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1982 * should be used only when the changes need to be taken as 1983 * a block, OR when one needs to force the kthread to forget 1984 * old state. 1985 */ 1986 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 1987 static unsigned int hotkey_poll_freq = 10; /* Hz */ 1988 1989 #define HOTKEY_CONFIG_CRITICAL_START \ 1990 do { \ 1991 mutex_lock(&hotkey_thread_data_mutex); \ 1992 hotkey_config_change++; \ 1993 } while (0); 1994 #define HOTKEY_CONFIG_CRITICAL_END \ 1995 mutex_unlock(&hotkey_thread_data_mutex); 1996 1997 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 1998 1999 #define hotkey_source_mask 0U 2000 #define HOTKEY_CONFIG_CRITICAL_START 2001 #define HOTKEY_CONFIG_CRITICAL_END 2002 2003 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2004 2005 static struct mutex hotkey_mutex; 2006 2007 static enum { /* Reasons for waking up */ 2008 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2009 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2010 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2011 } hotkey_wakeup_reason; 2012 2013 static int hotkey_autosleep_ack; 2014 2015 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2016 static u32 hotkey_all_mask; /* all events supported in fw */ 2017 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */ 2018 static u32 hotkey_reserved_mask; /* events better left disabled */ 2019 static u32 hotkey_driver_mask; /* events needed by the driver */ 2020 static u32 hotkey_user_mask; /* events visible to userspace */ 2021 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2022 2023 static u16 *hotkey_keycode_map; 2024 2025 static struct attribute_set *hotkey_dev_attributes; 2026 2027 static void tpacpi_driver_event(const unsigned int hkey_event); 2028 static void hotkey_driver_event(const unsigned int scancode); 2029 static void hotkey_poll_setup(const bool may_warn); 2030 2031 /* HKEY.MHKG() return bits */ 2032 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2033 enum { 2034 TP_ACPI_MULTI_MODE_INVALID = 0, 2035 TP_ACPI_MULTI_MODE_UNKNOWN = 1 << 0, 2036 TP_ACPI_MULTI_MODE_LAPTOP = 1 << 1, 2037 TP_ACPI_MULTI_MODE_TABLET = 1 << 2, 2038 TP_ACPI_MULTI_MODE_FLAT = 1 << 3, 2039 TP_ACPI_MULTI_MODE_STAND = 1 << 4, 2040 TP_ACPI_MULTI_MODE_TENT = 1 << 5, 2041 TP_ACPI_MULTI_MODE_STAND_TENT = 1 << 6, 2042 }; 2043 2044 enum { 2045 /* The following modes are considered tablet mode for the purpose of 2046 * reporting the status to userspace. i.e. in all these modes it makes 2047 * sense to disable the laptop input devices such as touchpad and 2048 * keyboard. 2049 */ 2050 TP_ACPI_MULTI_MODE_TABLET_LIKE = TP_ACPI_MULTI_MODE_TABLET | 2051 TP_ACPI_MULTI_MODE_STAND | 2052 TP_ACPI_MULTI_MODE_TENT | 2053 TP_ACPI_MULTI_MODE_STAND_TENT, 2054 }; 2055 2056 static int hotkey_get_wlsw(void) 2057 { 2058 int status; 2059 2060 if (!tp_features.hotkey_wlsw) 2061 return -ENODEV; 2062 2063 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2064 if (dbg_wlswemul) 2065 return (tpacpi_wlsw_emulstate) ? 2066 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2067 #endif 2068 2069 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2070 return -EIO; 2071 2072 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2073 } 2074 2075 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode) 2076 { 2077 int type = (s >> 16) & 0xffff; 2078 int value = s & 0xffff; 2079 int mode = TP_ACPI_MULTI_MODE_INVALID; 2080 int valid_modes = 0; 2081 2082 if (has_tablet_mode) 2083 *has_tablet_mode = 0; 2084 2085 switch (type) { 2086 case 1: 2087 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2088 TP_ACPI_MULTI_MODE_TABLET | 2089 TP_ACPI_MULTI_MODE_STAND_TENT; 2090 break; 2091 case 2: 2092 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2093 TP_ACPI_MULTI_MODE_FLAT | 2094 TP_ACPI_MULTI_MODE_TABLET | 2095 TP_ACPI_MULTI_MODE_STAND | 2096 TP_ACPI_MULTI_MODE_TENT; 2097 break; 2098 case 3: 2099 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2100 TP_ACPI_MULTI_MODE_FLAT; 2101 break; 2102 case 4: 2103 case 5: 2104 /* In mode 4, FLAT is not specified as a valid mode. However, 2105 * it can be seen at least on the X1 Yoga 2nd Generation. 2106 */ 2107 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2108 TP_ACPI_MULTI_MODE_FLAT | 2109 TP_ACPI_MULTI_MODE_TABLET | 2110 TP_ACPI_MULTI_MODE_STAND | 2111 TP_ACPI_MULTI_MODE_TENT; 2112 break; 2113 default: 2114 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n", 2115 type, value, TPACPI_MAIL); 2116 return 0; 2117 } 2118 2119 if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE)) 2120 *has_tablet_mode = 1; 2121 2122 switch (value) { 2123 case 1: 2124 mode = TP_ACPI_MULTI_MODE_LAPTOP; 2125 break; 2126 case 2: 2127 mode = TP_ACPI_MULTI_MODE_FLAT; 2128 break; 2129 case 3: 2130 mode = TP_ACPI_MULTI_MODE_TABLET; 2131 break; 2132 case 4: 2133 if (type == 1) 2134 mode = TP_ACPI_MULTI_MODE_STAND_TENT; 2135 else 2136 mode = TP_ACPI_MULTI_MODE_STAND; 2137 break; 2138 case 5: 2139 mode = TP_ACPI_MULTI_MODE_TENT; 2140 break; 2141 default: 2142 if (type == 5 && value == 0xffff) { 2143 pr_warn("Multi mode status is undetected, assuming laptop\n"); 2144 return 0; 2145 } 2146 } 2147 2148 if (!(mode & valid_modes)) { 2149 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n", 2150 value, type, TPACPI_MAIL); 2151 return 0; 2152 } 2153 2154 return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE); 2155 } 2156 2157 static int hotkey_get_tablet_mode(int *status) 2158 { 2159 int s; 2160 2161 switch (tp_features.hotkey_tablet) { 2162 case TP_HOTKEY_TABLET_USES_MHKG: 2163 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2164 return -EIO; 2165 2166 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2167 break; 2168 case TP_HOTKEY_TABLET_USES_GMMS: 2169 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0)) 2170 return -EIO; 2171 2172 *status = hotkey_gmms_get_tablet_mode(s, NULL); 2173 break; 2174 default: 2175 break; 2176 } 2177 2178 return 0; 2179 } 2180 2181 /* 2182 * Reads current event mask from firmware, and updates 2183 * hotkey_acpi_mask accordingly. Also resets any bits 2184 * from hotkey_user_mask that are unavailable to be 2185 * delivered (shadow requirement of the userspace ABI). 2186 * 2187 * Call with hotkey_mutex held 2188 */ 2189 static int hotkey_mask_get(void) 2190 { 2191 if (tp_features.hotkey_mask) { 2192 u32 m = 0; 2193 2194 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2195 return -EIO; 2196 2197 hotkey_acpi_mask = m; 2198 } else { 2199 /* no mask support doesn't mean no event support... */ 2200 hotkey_acpi_mask = hotkey_all_mask; 2201 } 2202 2203 /* sync userspace-visible mask */ 2204 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2205 2206 return 0; 2207 } 2208 2209 static void hotkey_mask_warn_incomplete_mask(void) 2210 { 2211 /* log only what the user can fix... */ 2212 const u32 wantedmask = hotkey_driver_mask & 2213 ~(hotkey_acpi_mask | hotkey_source_mask) & 2214 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2215 2216 if (wantedmask) 2217 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2218 } 2219 2220 /* 2221 * Set the firmware mask when supported 2222 * 2223 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2224 * 2225 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2226 * 2227 * Call with hotkey_mutex held 2228 */ 2229 static int hotkey_mask_set(u32 mask) 2230 { 2231 int i; 2232 int rc = 0; 2233 2234 const u32 fwmask = mask & ~hotkey_source_mask; 2235 2236 if (tp_features.hotkey_mask) { 2237 for (i = 0; i < 32; i++) { 2238 if (!acpi_evalf(hkey_handle, 2239 NULL, "MHKM", "vdd", i + 1, 2240 !!(mask & (1 << i)))) { 2241 rc = -EIO; 2242 break; 2243 } 2244 } 2245 } 2246 2247 /* 2248 * We *must* make an inconditional call to hotkey_mask_get to 2249 * refresh hotkey_acpi_mask and update hotkey_user_mask 2250 * 2251 * Take the opportunity to also log when we cannot _enable_ 2252 * a given event. 2253 */ 2254 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2255 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n", 2256 fwmask, hotkey_acpi_mask); 2257 } 2258 2259 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2260 hotkey_mask_warn_incomplete_mask(); 2261 2262 return rc; 2263 } 2264 2265 /* 2266 * Sets hotkey_user_mask and tries to set the firmware mask 2267 * 2268 * Call with hotkey_mutex held 2269 */ 2270 static int hotkey_user_mask_set(const u32 mask) 2271 { 2272 int rc; 2273 2274 /* Give people a chance to notice they are doing something that 2275 * is bound to go boom on their users sooner or later */ 2276 if (!tp_warned.hotkey_mask_ff && 2277 (mask == 0xffff || mask == 0xffffff || 2278 mask == 0xffffffff)) { 2279 tp_warned.hotkey_mask_ff = 1; 2280 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n", 2281 mask); 2282 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n"); 2283 } 2284 2285 /* Try to enable what the user asked for, plus whatever we need. 2286 * this syncs everything but won't enable bits in hotkey_user_mask */ 2287 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2288 2289 /* Enable the available bits in hotkey_user_mask */ 2290 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2291 2292 return rc; 2293 } 2294 2295 /* 2296 * Sets the driver hotkey mask. 2297 * 2298 * Can be called even if the hotkey subdriver is inactive 2299 */ 2300 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2301 { 2302 int rc; 2303 2304 /* Do the right thing if hotkey_init has not been called yet */ 2305 if (!tp_features.hotkey) { 2306 hotkey_driver_mask = mask; 2307 return 0; 2308 } 2309 2310 mutex_lock(&hotkey_mutex); 2311 2312 HOTKEY_CONFIG_CRITICAL_START 2313 hotkey_driver_mask = mask; 2314 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2315 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2316 #endif 2317 HOTKEY_CONFIG_CRITICAL_END 2318 2319 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2320 ~hotkey_source_mask); 2321 hotkey_poll_setup(true); 2322 2323 mutex_unlock(&hotkey_mutex); 2324 2325 return rc; 2326 } 2327 2328 static int hotkey_status_get(int *status) 2329 { 2330 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2331 return -EIO; 2332 2333 return 0; 2334 } 2335 2336 static int hotkey_status_set(bool enable) 2337 { 2338 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2339 return -EIO; 2340 2341 return 0; 2342 } 2343 2344 static void tpacpi_input_send_tabletsw(void) 2345 { 2346 int state; 2347 2348 if (tp_features.hotkey_tablet && 2349 !hotkey_get_tablet_mode(&state)) { 2350 mutex_lock(&tpacpi_inputdev_send_mutex); 2351 2352 input_report_switch(tpacpi_inputdev, 2353 SW_TABLET_MODE, !!state); 2354 input_sync(tpacpi_inputdev); 2355 2356 mutex_unlock(&tpacpi_inputdev_send_mutex); 2357 } 2358 } 2359 2360 /* Do NOT call without validating scancode first */ 2361 static void tpacpi_input_send_key(const unsigned int scancode) 2362 { 2363 const unsigned int keycode = hotkey_keycode_map[scancode]; 2364 2365 if (keycode != KEY_RESERVED) { 2366 mutex_lock(&tpacpi_inputdev_send_mutex); 2367 2368 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2369 input_report_key(tpacpi_inputdev, keycode, 1); 2370 input_sync(tpacpi_inputdev); 2371 2372 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2373 input_report_key(tpacpi_inputdev, keycode, 0); 2374 input_sync(tpacpi_inputdev); 2375 2376 mutex_unlock(&tpacpi_inputdev_send_mutex); 2377 } 2378 } 2379 2380 /* Do NOT call without validating scancode first */ 2381 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2382 { 2383 hotkey_driver_event(scancode); 2384 if (hotkey_user_mask & (1 << scancode)) 2385 tpacpi_input_send_key(scancode); 2386 } 2387 2388 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2389 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2390 2391 /* Do NOT call without validating scancode first */ 2392 static void tpacpi_hotkey_send_key(unsigned int scancode) 2393 { 2394 tpacpi_input_send_key_masked(scancode); 2395 } 2396 2397 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2398 { 2399 u8 d; 2400 2401 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2402 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2403 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2404 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2405 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2406 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2407 } 2408 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) { 2409 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2410 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2411 } 2412 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2413 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2414 n->displayexp_toggle = 2415 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2416 } 2417 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2418 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2419 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2420 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2421 n->brightness_toggle = 2422 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2423 } 2424 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2425 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2426 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2427 >> TP_NVRAM_POS_LEVEL_VOLUME; 2428 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2429 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2430 } 2431 } 2432 2433 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2434 do { \ 2435 if ((event_mask & (1 << __scancode)) && \ 2436 oldn->__member != newn->__member) \ 2437 tpacpi_hotkey_send_key(__scancode); \ 2438 } while (0) 2439 2440 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2441 do { \ 2442 if (event_mask & (1 << __scancode)) \ 2443 tpacpi_hotkey_send_key(__scancode); \ 2444 } while (0) 2445 2446 static void issue_volchange(const unsigned int oldvol, 2447 const unsigned int newvol, 2448 const u32 event_mask) 2449 { 2450 unsigned int i = oldvol; 2451 2452 while (i > newvol) { 2453 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2454 i--; 2455 } 2456 while (i < newvol) { 2457 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2458 i++; 2459 } 2460 } 2461 2462 static void issue_brightnesschange(const unsigned int oldbrt, 2463 const unsigned int newbrt, 2464 const u32 event_mask) 2465 { 2466 unsigned int i = oldbrt; 2467 2468 while (i > newbrt) { 2469 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2470 i--; 2471 } 2472 while (i < newbrt) { 2473 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2474 i++; 2475 } 2476 } 2477 2478 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2479 struct tp_nvram_state *newn, 2480 const u32 event_mask) 2481 { 2482 2483 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2484 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2485 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2486 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2487 2488 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2489 2490 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2491 2492 /* 2493 * Handle volume 2494 * 2495 * This code is supposed to duplicate the IBM firmware behaviour: 2496 * - Pressing MUTE issues mute hotkey message, even when already mute 2497 * - Pressing Volume up/down issues volume up/down hotkey messages, 2498 * even when already at maximum or minimum volume 2499 * - The act of unmuting issues volume up/down notification, 2500 * depending which key was used to unmute 2501 * 2502 * We are constrained to what the NVRAM can tell us, which is not much 2503 * and certainly not enough if more than one volume hotkey was pressed 2504 * since the last poll cycle. 2505 * 2506 * Just to make our life interesting, some newer Lenovo ThinkPads have 2507 * bugs in the BIOS and may fail to update volume_toggle properly. 2508 */ 2509 if (newn->mute) { 2510 /* muted */ 2511 if (!oldn->mute || 2512 oldn->volume_toggle != newn->volume_toggle || 2513 oldn->volume_level != newn->volume_level) { 2514 /* recently muted, or repeated mute keypress, or 2515 * multiple presses ending in mute */ 2516 issue_volchange(oldn->volume_level, newn->volume_level, 2517 event_mask); 2518 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2519 } 2520 } else { 2521 /* unmute */ 2522 if (oldn->mute) { 2523 /* recently unmuted, issue 'unmute' keypress */ 2524 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2525 } 2526 if (oldn->volume_level != newn->volume_level) { 2527 issue_volchange(oldn->volume_level, newn->volume_level, 2528 event_mask); 2529 } else if (oldn->volume_toggle != newn->volume_toggle) { 2530 /* repeated vol up/down keypress at end of scale ? */ 2531 if (newn->volume_level == 0) 2532 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2533 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2534 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2535 } 2536 } 2537 2538 /* handle brightness */ 2539 if (oldn->brightness_level != newn->brightness_level) { 2540 issue_brightnesschange(oldn->brightness_level, 2541 newn->brightness_level, event_mask); 2542 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2543 /* repeated key presses that didn't change state */ 2544 if (newn->brightness_level == 0) 2545 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2546 else if (newn->brightness_level >= bright_maxlvl 2547 && !tp_features.bright_unkfw) 2548 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2549 } 2550 2551 #undef TPACPI_COMPARE_KEY 2552 #undef TPACPI_MAY_SEND_KEY 2553 } 2554 2555 /* 2556 * Polling driver 2557 * 2558 * We track all events in hotkey_source_mask all the time, since 2559 * most of them are edge-based. We only issue those requested by 2560 * hotkey_user_mask or hotkey_driver_mask, though. 2561 */ 2562 static int hotkey_kthread(void *data) 2563 { 2564 struct tp_nvram_state s[2]; 2565 u32 poll_mask, event_mask; 2566 unsigned int si, so; 2567 unsigned long t; 2568 unsigned int change_detector; 2569 unsigned int poll_freq; 2570 bool was_frozen; 2571 2572 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2573 goto exit; 2574 2575 set_freezable(); 2576 2577 so = 0; 2578 si = 1; 2579 t = 0; 2580 2581 /* Initial state for compares */ 2582 mutex_lock(&hotkey_thread_data_mutex); 2583 change_detector = hotkey_config_change; 2584 poll_mask = hotkey_source_mask; 2585 event_mask = hotkey_source_mask & 2586 (hotkey_driver_mask | hotkey_user_mask); 2587 poll_freq = hotkey_poll_freq; 2588 mutex_unlock(&hotkey_thread_data_mutex); 2589 hotkey_read_nvram(&s[so], poll_mask); 2590 2591 while (!kthread_should_stop()) { 2592 if (t == 0) { 2593 if (likely(poll_freq)) 2594 t = 1000/poll_freq; 2595 else 2596 t = 100; /* should never happen... */ 2597 } 2598 t = msleep_interruptible(t); 2599 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2600 break; 2601 2602 if (t > 0 && !was_frozen) 2603 continue; 2604 2605 mutex_lock(&hotkey_thread_data_mutex); 2606 if (was_frozen || hotkey_config_change != change_detector) { 2607 /* forget old state on thaw or config change */ 2608 si = so; 2609 t = 0; 2610 change_detector = hotkey_config_change; 2611 } 2612 poll_mask = hotkey_source_mask; 2613 event_mask = hotkey_source_mask & 2614 (hotkey_driver_mask | hotkey_user_mask); 2615 poll_freq = hotkey_poll_freq; 2616 mutex_unlock(&hotkey_thread_data_mutex); 2617 2618 if (likely(poll_mask)) { 2619 hotkey_read_nvram(&s[si], poll_mask); 2620 if (likely(si != so)) { 2621 hotkey_compare_and_issue_event(&s[so], &s[si], 2622 event_mask); 2623 } 2624 } 2625 2626 so = si; 2627 si ^= 1; 2628 } 2629 2630 exit: 2631 return 0; 2632 } 2633 2634 /* call with hotkey_mutex held */ 2635 static void hotkey_poll_stop_sync(void) 2636 { 2637 if (tpacpi_hotkey_task) { 2638 kthread_stop(tpacpi_hotkey_task); 2639 tpacpi_hotkey_task = NULL; 2640 } 2641 } 2642 2643 /* call with hotkey_mutex held */ 2644 static void hotkey_poll_setup(const bool may_warn) 2645 { 2646 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2647 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2648 2649 if (hotkey_poll_freq > 0 && 2650 (poll_driver_mask || 2651 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2652 if (!tpacpi_hotkey_task) { 2653 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2654 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2655 if (IS_ERR(tpacpi_hotkey_task)) { 2656 tpacpi_hotkey_task = NULL; 2657 pr_err("could not create kernel thread for hotkey polling\n"); 2658 } 2659 } 2660 } else { 2661 hotkey_poll_stop_sync(); 2662 if (may_warn && (poll_driver_mask || poll_user_mask) && 2663 hotkey_poll_freq == 0) { 2664 pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n", 2665 poll_user_mask, poll_driver_mask); 2666 } 2667 } 2668 } 2669 2670 static void hotkey_poll_setup_safe(const bool may_warn) 2671 { 2672 mutex_lock(&hotkey_mutex); 2673 hotkey_poll_setup(may_warn); 2674 mutex_unlock(&hotkey_mutex); 2675 } 2676 2677 /* call with hotkey_mutex held */ 2678 static void hotkey_poll_set_freq(unsigned int freq) 2679 { 2680 if (!freq) 2681 hotkey_poll_stop_sync(); 2682 2683 hotkey_poll_freq = freq; 2684 } 2685 2686 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2687 2688 static void hotkey_poll_setup(const bool __unused) 2689 { 2690 } 2691 2692 static void hotkey_poll_setup_safe(const bool __unused) 2693 { 2694 } 2695 2696 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2697 2698 static int hotkey_inputdev_open(struct input_dev *dev) 2699 { 2700 switch (tpacpi_lifecycle) { 2701 case TPACPI_LIFE_INIT: 2702 case TPACPI_LIFE_RUNNING: 2703 hotkey_poll_setup_safe(false); 2704 return 0; 2705 case TPACPI_LIFE_EXITING: 2706 return -EBUSY; 2707 } 2708 2709 /* Should only happen if tpacpi_lifecycle is corrupt */ 2710 BUG(); 2711 return -EBUSY; 2712 } 2713 2714 static void hotkey_inputdev_close(struct input_dev *dev) 2715 { 2716 /* disable hotkey polling when possible */ 2717 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2718 !(hotkey_source_mask & hotkey_driver_mask)) 2719 hotkey_poll_setup_safe(false); 2720 } 2721 2722 /* sysfs hotkey enable ------------------------------------------------- */ 2723 static ssize_t hotkey_enable_show(struct device *dev, 2724 struct device_attribute *attr, 2725 char *buf) 2726 { 2727 int res, status; 2728 2729 printk_deprecated_attribute("hotkey_enable", 2730 "Hotkey reporting is always enabled"); 2731 2732 res = hotkey_status_get(&status); 2733 if (res) 2734 return res; 2735 2736 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2737 } 2738 2739 static ssize_t hotkey_enable_store(struct device *dev, 2740 struct device_attribute *attr, 2741 const char *buf, size_t count) 2742 { 2743 unsigned long t; 2744 2745 printk_deprecated_attribute("hotkey_enable", 2746 "Hotkeys can be disabled through hotkey_mask"); 2747 2748 if (parse_strtoul(buf, 1, &t)) 2749 return -EINVAL; 2750 2751 if (t == 0) 2752 return -EPERM; 2753 2754 return count; 2755 } 2756 2757 static DEVICE_ATTR_RW(hotkey_enable); 2758 2759 /* sysfs hotkey mask --------------------------------------------------- */ 2760 static ssize_t hotkey_mask_show(struct device *dev, 2761 struct device_attribute *attr, 2762 char *buf) 2763 { 2764 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2765 } 2766 2767 static ssize_t hotkey_mask_store(struct device *dev, 2768 struct device_attribute *attr, 2769 const char *buf, size_t count) 2770 { 2771 unsigned long t; 2772 int res; 2773 2774 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2775 return -EINVAL; 2776 2777 if (mutex_lock_killable(&hotkey_mutex)) 2778 return -ERESTARTSYS; 2779 2780 res = hotkey_user_mask_set(t); 2781 2782 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2783 hotkey_poll_setup(true); 2784 #endif 2785 2786 mutex_unlock(&hotkey_mutex); 2787 2788 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2789 2790 return (res) ? res : count; 2791 } 2792 2793 static DEVICE_ATTR_RW(hotkey_mask); 2794 2795 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2796 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2797 struct device_attribute *attr, 2798 char *buf) 2799 { 2800 return sprintf(buf, "0\n"); 2801 } 2802 2803 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2804 2805 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2806 static ssize_t hotkey_bios_mask_show(struct device *dev, 2807 struct device_attribute *attr, 2808 char *buf) 2809 { 2810 printk_deprecated_attribute("hotkey_bios_mask", 2811 "This attribute is useless."); 2812 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2813 } 2814 2815 static DEVICE_ATTR_RO(hotkey_bios_mask); 2816 2817 /* sysfs hotkey all_mask ----------------------------------------------- */ 2818 static ssize_t hotkey_all_mask_show(struct device *dev, 2819 struct device_attribute *attr, 2820 char *buf) 2821 { 2822 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2823 hotkey_all_mask | hotkey_source_mask); 2824 } 2825 2826 static DEVICE_ATTR_RO(hotkey_all_mask); 2827 2828 /* sysfs hotkey all_mask ----------------------------------------------- */ 2829 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev, 2830 struct device_attribute *attr, 2831 char *buf) 2832 { 2833 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2834 hotkey_adaptive_all_mask | hotkey_source_mask); 2835 } 2836 2837 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask); 2838 2839 /* sysfs hotkey recommended_mask --------------------------------------- */ 2840 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2841 struct device_attribute *attr, 2842 char *buf) 2843 { 2844 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2845 (hotkey_all_mask | hotkey_source_mask) 2846 & ~hotkey_reserved_mask); 2847 } 2848 2849 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2850 2851 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2852 2853 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2854 static ssize_t hotkey_source_mask_show(struct device *dev, 2855 struct device_attribute *attr, 2856 char *buf) 2857 { 2858 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2859 } 2860 2861 static ssize_t hotkey_source_mask_store(struct device *dev, 2862 struct device_attribute *attr, 2863 const char *buf, size_t count) 2864 { 2865 unsigned long t; 2866 u32 r_ev; 2867 int rc; 2868 2869 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2870 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2871 return -EINVAL; 2872 2873 if (mutex_lock_killable(&hotkey_mutex)) 2874 return -ERESTARTSYS; 2875 2876 HOTKEY_CONFIG_CRITICAL_START 2877 hotkey_source_mask = t; 2878 HOTKEY_CONFIG_CRITICAL_END 2879 2880 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2881 ~hotkey_source_mask); 2882 hotkey_poll_setup(true); 2883 2884 /* check if events needed by the driver got disabled */ 2885 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2886 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2887 2888 mutex_unlock(&hotkey_mutex); 2889 2890 if (rc < 0) 2891 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n"); 2892 2893 if (r_ev) 2894 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n", 2895 r_ev); 2896 2897 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2898 2899 return (rc < 0) ? rc : count; 2900 } 2901 2902 static DEVICE_ATTR_RW(hotkey_source_mask); 2903 2904 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2905 static ssize_t hotkey_poll_freq_show(struct device *dev, 2906 struct device_attribute *attr, 2907 char *buf) 2908 { 2909 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2910 } 2911 2912 static ssize_t hotkey_poll_freq_store(struct device *dev, 2913 struct device_attribute *attr, 2914 const char *buf, size_t count) 2915 { 2916 unsigned long t; 2917 2918 if (parse_strtoul(buf, 25, &t)) 2919 return -EINVAL; 2920 2921 if (mutex_lock_killable(&hotkey_mutex)) 2922 return -ERESTARTSYS; 2923 2924 hotkey_poll_set_freq(t); 2925 hotkey_poll_setup(true); 2926 2927 mutex_unlock(&hotkey_mutex); 2928 2929 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2930 2931 return count; 2932 } 2933 2934 static DEVICE_ATTR_RW(hotkey_poll_freq); 2935 2936 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2937 2938 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2939 static ssize_t hotkey_radio_sw_show(struct device *dev, 2940 struct device_attribute *attr, 2941 char *buf) 2942 { 2943 int res; 2944 res = hotkey_get_wlsw(); 2945 if (res < 0) 2946 return res; 2947 2948 /* Opportunistic update */ 2949 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2950 2951 return snprintf(buf, PAGE_SIZE, "%d\n", 2952 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2953 } 2954 2955 static DEVICE_ATTR_RO(hotkey_radio_sw); 2956 2957 static void hotkey_radio_sw_notify_change(void) 2958 { 2959 if (tp_features.hotkey_wlsw) 2960 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2961 "hotkey_radio_sw"); 2962 } 2963 2964 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2965 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2966 struct device_attribute *attr, 2967 char *buf) 2968 { 2969 int res, s; 2970 res = hotkey_get_tablet_mode(&s); 2971 if (res < 0) 2972 return res; 2973 2974 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2975 } 2976 2977 static DEVICE_ATTR_RO(hotkey_tablet_mode); 2978 2979 static void hotkey_tablet_mode_notify_change(void) 2980 { 2981 if (tp_features.hotkey_tablet) 2982 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2983 "hotkey_tablet_mode"); 2984 } 2985 2986 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2987 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2988 struct device_attribute *attr, 2989 char *buf) 2990 { 2991 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2992 } 2993 2994 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2995 2996 static void hotkey_wakeup_reason_notify_change(void) 2997 { 2998 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2999 "wakeup_reason"); 3000 } 3001 3002 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 3003 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 3004 struct device_attribute *attr, 3005 char *buf) 3006 { 3007 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 3008 } 3009 3010 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 3011 hotkey_wakeup_hotunplug_complete_show, NULL); 3012 3013 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 3014 { 3015 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3016 "wakeup_hotunplug_complete"); 3017 } 3018 3019 /* sysfs adaptive kbd mode --------------------------------------------- */ 3020 3021 static int adaptive_keyboard_get_mode(void); 3022 static int adaptive_keyboard_set_mode(int new_mode); 3023 3024 enum ADAPTIVE_KEY_MODE { 3025 HOME_MODE, 3026 WEB_BROWSER_MODE, 3027 WEB_CONFERENCE_MODE, 3028 FUNCTION_MODE, 3029 LAYFLAT_MODE 3030 }; 3031 3032 static ssize_t adaptive_kbd_mode_show(struct device *dev, 3033 struct device_attribute *attr, 3034 char *buf) 3035 { 3036 int current_mode; 3037 3038 current_mode = adaptive_keyboard_get_mode(); 3039 if (current_mode < 0) 3040 return current_mode; 3041 3042 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 3043 } 3044 3045 static ssize_t adaptive_kbd_mode_store(struct device *dev, 3046 struct device_attribute *attr, 3047 const char *buf, size_t count) 3048 { 3049 unsigned long t; 3050 int res; 3051 3052 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 3053 return -EINVAL; 3054 3055 res = adaptive_keyboard_set_mode(t); 3056 return (res < 0) ? res : count; 3057 } 3058 3059 static DEVICE_ATTR_RW(adaptive_kbd_mode); 3060 3061 static struct attribute *adaptive_kbd_attributes[] = { 3062 &dev_attr_adaptive_kbd_mode.attr, 3063 NULL 3064 }; 3065 3066 static const struct attribute_group adaptive_kbd_attr_group = { 3067 .attrs = adaptive_kbd_attributes, 3068 }; 3069 3070 /* --------------------------------------------------------------------- */ 3071 3072 static struct attribute *hotkey_attributes[] __initdata = { 3073 &dev_attr_hotkey_enable.attr, 3074 &dev_attr_hotkey_bios_enabled.attr, 3075 &dev_attr_hotkey_bios_mask.attr, 3076 &dev_attr_wakeup_reason.attr, 3077 &dev_attr_wakeup_hotunplug_complete.attr, 3078 &dev_attr_hotkey_mask.attr, 3079 &dev_attr_hotkey_all_mask.attr, 3080 &dev_attr_hotkey_adaptive_all_mask.attr, 3081 &dev_attr_hotkey_recommended_mask.attr, 3082 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3083 &dev_attr_hotkey_source_mask.attr, 3084 &dev_attr_hotkey_poll_freq.attr, 3085 #endif 3086 }; 3087 3088 /* 3089 * Sync both the hw and sw blocking state of all switches 3090 */ 3091 static void tpacpi_send_radiosw_update(void) 3092 { 3093 int wlsw; 3094 3095 /* 3096 * We must sync all rfkill controllers *before* issuing any 3097 * rfkill input events, or we will race the rfkill core input 3098 * handler. 3099 * 3100 * tpacpi_inputdev_send_mutex works as a synchronization point 3101 * for the above. 3102 * 3103 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3104 */ 3105 3106 wlsw = hotkey_get_wlsw(); 3107 3108 /* Sync hw blocking state first if it is hw-blocked */ 3109 if (wlsw == TPACPI_RFK_RADIO_OFF) 3110 tpacpi_rfk_update_hwblock_state(true); 3111 3112 /* Sync sw blocking state */ 3113 tpacpi_rfk_update_swstate_all(); 3114 3115 /* Sync hw blocking state last if it is hw-unblocked */ 3116 if (wlsw == TPACPI_RFK_RADIO_ON) 3117 tpacpi_rfk_update_hwblock_state(false); 3118 3119 /* Issue rfkill input event for WLSW switch */ 3120 if (!(wlsw < 0)) { 3121 mutex_lock(&tpacpi_inputdev_send_mutex); 3122 3123 input_report_switch(tpacpi_inputdev, 3124 SW_RFKILL_ALL, (wlsw > 0)); 3125 input_sync(tpacpi_inputdev); 3126 3127 mutex_unlock(&tpacpi_inputdev_send_mutex); 3128 } 3129 3130 /* 3131 * this can be unconditional, as we will poll state again 3132 * if userspace uses the notify to read data 3133 */ 3134 hotkey_radio_sw_notify_change(); 3135 } 3136 3137 static void hotkey_exit(void) 3138 { 3139 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3140 mutex_lock(&hotkey_mutex); 3141 hotkey_poll_stop_sync(); 3142 mutex_unlock(&hotkey_mutex); 3143 #endif 3144 3145 if (hotkey_dev_attributes) 3146 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3147 3148 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3149 "restoring original HKEY status and mask\n"); 3150 /* yes, there is a bitwise or below, we want the 3151 * functions to be called even if one of them fail */ 3152 if (((tp_features.hotkey_mask && 3153 hotkey_mask_set(hotkey_orig_mask)) | 3154 hotkey_status_set(false)) != 0) 3155 pr_err("failed to restore hot key mask to BIOS defaults\n"); 3156 } 3157 3158 static void __init hotkey_unmap(const unsigned int scancode) 3159 { 3160 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3161 clear_bit(hotkey_keycode_map[scancode], 3162 tpacpi_inputdev->keybit); 3163 hotkey_keycode_map[scancode] = KEY_RESERVED; 3164 } 3165 } 3166 3167 /* 3168 * HKEY quirks: 3169 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3170 */ 3171 3172 #define TPACPI_HK_Q_INIMASK 0x0001 3173 3174 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3175 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3176 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3177 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3178 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3179 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3180 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3181 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3182 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3183 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3184 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3185 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3186 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3187 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3188 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3189 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3190 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3191 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3192 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3193 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3194 }; 3195 3196 typedef u16 tpacpi_keymap_entry_t; 3197 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3198 3199 static int hotkey_init_tablet_mode(void) 3200 { 3201 int in_tablet_mode = 0, res; 3202 char *type = NULL; 3203 3204 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) { 3205 int has_tablet_mode; 3206 3207 in_tablet_mode = hotkey_gmms_get_tablet_mode(res, 3208 &has_tablet_mode); 3209 if (has_tablet_mode) 3210 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS; 3211 type = "GMMS"; 3212 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { 3213 /* For X41t, X60t, X61t Tablets... */ 3214 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; 3215 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); 3216 type = "MHKG"; 3217 } 3218 3219 if (!tp_features.hotkey_tablet) 3220 return 0; 3221 3222 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", 3223 type, in_tablet_mode ? "tablet" : "laptop"); 3224 3225 res = add_to_attr_set(hotkey_dev_attributes, 3226 &dev_attr_hotkey_tablet_mode.attr); 3227 if (res) 3228 return -1; 3229 3230 return in_tablet_mode; 3231 } 3232 3233 static int __init hotkey_init(struct ibm_init_struct *iibm) 3234 { 3235 /* Requirements for changing the default keymaps: 3236 * 3237 * 1. Many of the keys are mapped to KEY_RESERVED for very 3238 * good reasons. Do not change them unless you have deep 3239 * knowledge on the IBM and Lenovo ThinkPad firmware for 3240 * the various ThinkPad models. The driver behaves 3241 * differently for KEY_RESERVED: such keys have their 3242 * hot key mask *unset* in mask_recommended, and also 3243 * in the initial hot key mask programmed into the 3244 * firmware at driver load time, which means the firm- 3245 * ware may react very differently if you change them to 3246 * something else; 3247 * 3248 * 2. You must be subscribed to the linux-thinkpad and 3249 * ibm-acpi-devel mailing lists, and you should read the 3250 * list archives since 2007 if you want to change the 3251 * keymaps. This requirement exists so that you will 3252 * know the past history of problems with the thinkpad- 3253 * acpi driver keymaps, and also that you will be 3254 * listening to any bug reports; 3255 * 3256 * 3. Do not send thinkpad-acpi specific patches directly to 3257 * for merging, *ever*. Send them to the linux-acpi 3258 * mailinglist for comments. Merging is to be done only 3259 * through acpi-test and the ACPI maintainer. 3260 * 3261 * If the above is too much to ask, don't change the keymap. 3262 * Ask the thinkpad-acpi maintainer to do it, instead. 3263 */ 3264 3265 enum keymap_index { 3266 TPACPI_KEYMAP_IBM_GENERIC = 0, 3267 TPACPI_KEYMAP_LENOVO_GENERIC, 3268 }; 3269 3270 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3271 /* Generic keymap for IBM ThinkPads */ 3272 [TPACPI_KEYMAP_IBM_GENERIC] = { 3273 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3274 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3275 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3276 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3277 3278 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3279 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3280 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3281 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3282 3283 /* brightness: firmware always reacts to them */ 3284 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3285 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3286 3287 /* Thinklight: firmware always react to it */ 3288 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3289 3290 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3291 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3292 3293 /* Volume: firmware always react to it and reprograms 3294 * the built-in *extra* mixer. Never map it to control 3295 * another mixer by default. */ 3296 KEY_RESERVED, /* 0x14: VOLUME UP */ 3297 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3298 KEY_RESERVED, /* 0x16: MUTE */ 3299 3300 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3301 3302 /* (assignments unknown, please report if found) */ 3303 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3304 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3305 3306 /* No assignments, only used for Adaptive keyboards. */ 3307 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3308 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3309 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3310 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3311 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3312 3313 /* No assignment, used for newer Lenovo models */ 3314 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3315 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3316 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3317 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3318 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3319 KEY_UNKNOWN, KEY_UNKNOWN 3320 3321 }, 3322 3323 /* Generic keymap for Lenovo ThinkPads */ 3324 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3325 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3326 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3327 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3328 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3329 3330 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3331 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3332 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3333 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3334 3335 /* These should be enabled --only-- when ACPI video 3336 * is disabled (i.e. in "vendor" mode), and are handled 3337 * in a special way by the init code */ 3338 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3339 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3340 3341 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3342 3343 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3344 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3345 3346 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3347 * react to it and reprograms the built-in *extra* mixer. 3348 * Never map it to control another mixer by default. 3349 * 3350 * T60?, T61, R60?, R61: firmware and EC tries to send 3351 * these over the regular keyboard, so these are no-ops, 3352 * but there are still weird bugs re. MUTE, so do not 3353 * change unless you get test reports from all Lenovo 3354 * models. May cause the BIOS to interfere with the 3355 * HDA mixer. 3356 */ 3357 KEY_RESERVED, /* 0x14: VOLUME UP */ 3358 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3359 KEY_RESERVED, /* 0x16: MUTE */ 3360 3361 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3362 3363 /* (assignments unknown, please report if found) */ 3364 KEY_UNKNOWN, KEY_UNKNOWN, 3365 3366 /* 3367 * The mic mute button only sends 0x1a. It does not 3368 * automatically mute the mic or change the mute light. 3369 */ 3370 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3371 3372 /* (assignments unknown, please report if found) */ 3373 KEY_UNKNOWN, 3374 3375 /* Extra keys in use since the X240 / T440 / T540 */ 3376 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3377 3378 /* 3379 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3380 * The first item in this list is the Mute button which is 3381 * emitted with 0x103 through 3382 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3383 * symbol is held. 3384 * We'll need to offset those by 0x20. 3385 */ 3386 KEY_RESERVED, /* Mute held, 0x103 */ 3387 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3388 KEY_RESERVED, /* Clipping tool */ 3389 KEY_RESERVED, /* Cloud */ 3390 KEY_RESERVED, 3391 KEY_VOICECOMMAND, /* Voice */ 3392 KEY_RESERVED, 3393 KEY_RESERVED, /* Gestures */ 3394 KEY_RESERVED, 3395 KEY_RESERVED, 3396 KEY_RESERVED, 3397 KEY_CONFIG, /* Settings */ 3398 KEY_RESERVED, /* New tab */ 3399 KEY_REFRESH, /* Reload */ 3400 KEY_BACK, /* Back */ 3401 KEY_RESERVED, /* Microphone down */ 3402 KEY_RESERVED, /* Microphone up */ 3403 KEY_RESERVED, /* Microphone cancellation */ 3404 KEY_RESERVED, /* Camera mode */ 3405 KEY_RESERVED, /* Rotate display, 0x116 */ 3406 3407 /* 3408 * These are found in 2017 models (e.g. T470s, X270). 3409 * The lowest known value is 0x311, which according to 3410 * the manual should launch a user defined favorite 3411 * application. 3412 * 3413 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START, 3414 * corresponding to 0x34. 3415 */ 3416 3417 /* (assignments unknown, please report if found) */ 3418 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3419 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3420 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3421 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3422 KEY_UNKNOWN, 3423 3424 KEY_BOOKMARKS, /* Favorite app, 0x311 */ 3425 KEY_RESERVED, /* Clipping tool */ 3426 KEY_CALC, /* Calculator (above numpad, P52) */ 3427 KEY_BLUETOOTH, /* Bluetooth */ 3428 KEY_KEYBOARD /* Keyboard, 0x315 */ 3429 }, 3430 }; 3431 3432 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3433 /* Generic maps (fallback) */ 3434 { 3435 .vendor = PCI_VENDOR_ID_IBM, 3436 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3437 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3438 }, 3439 { 3440 .vendor = PCI_VENDOR_ID_LENOVO, 3441 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3442 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3443 }, 3444 }; 3445 3446 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3447 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3448 3449 int res, i; 3450 int status; 3451 int hkeyv; 3452 bool radiosw_state = false; 3453 bool tabletsw_state = false; 3454 3455 unsigned long quirks; 3456 unsigned long keymap_id; 3457 3458 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3459 "initializing hotkey subdriver\n"); 3460 3461 BUG_ON(!tpacpi_inputdev); 3462 BUG_ON(tpacpi_inputdev->open != NULL || 3463 tpacpi_inputdev->close != NULL); 3464 3465 TPACPI_ACPIHANDLE_INIT(hkey); 3466 mutex_init(&hotkey_mutex); 3467 3468 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3469 mutex_init(&hotkey_thread_data_mutex); 3470 #endif 3471 3472 /* hotkey not supported on 570 */ 3473 tp_features.hotkey = hkey_handle != NULL; 3474 3475 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3476 "hotkeys are %s\n", 3477 str_supported(tp_features.hotkey)); 3478 3479 if (!tp_features.hotkey) 3480 return 1; 3481 3482 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3483 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3484 3485 tpacpi_disable_brightness_delay(); 3486 3487 /* MUST have enough space for all attributes to be added to 3488 * hotkey_dev_attributes */ 3489 hotkey_dev_attributes = create_attr_set( 3490 ARRAY_SIZE(hotkey_attributes) + 2, 3491 NULL); 3492 if (!hotkey_dev_attributes) 3493 return -ENOMEM; 3494 res = add_many_to_attr_set(hotkey_dev_attributes, 3495 hotkey_attributes, 3496 ARRAY_SIZE(hotkey_attributes)); 3497 if (res) 3498 goto err_exit; 3499 3500 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3501 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3502 for HKEY interface version 0x100 */ 3503 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3504 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3505 "firmware HKEY interface version: 0x%x\n", 3506 hkeyv); 3507 3508 switch (hkeyv >> 8) { 3509 case 1: 3510 /* 3511 * MHKV 0x100 in A31, R40, R40e, 3512 * T4x, X31, and later 3513 */ 3514 3515 /* Paranoia check AND init hotkey_all_mask */ 3516 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3517 "MHKA", "qd")) { 3518 pr_err("missing MHKA handler, please report this to %s\n", 3519 TPACPI_MAIL); 3520 /* Fallback: pre-init for FN+F3,F4,F12 */ 3521 hotkey_all_mask = 0x080cU; 3522 } else { 3523 tp_features.hotkey_mask = 1; 3524 } 3525 break; 3526 3527 case 2: 3528 /* 3529 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3530 */ 3531 3532 /* Paranoia check AND init hotkey_all_mask */ 3533 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3534 "MHKA", "dd", 1)) { 3535 pr_err("missing MHKA handler, please report this to %s\n", 3536 TPACPI_MAIL); 3537 /* Fallback: pre-init for FN+F3,F4,F12 */ 3538 hotkey_all_mask = 0x080cU; 3539 } else { 3540 tp_features.hotkey_mask = 1; 3541 } 3542 3543 /* 3544 * Check if we have an adaptive keyboard, like on the 3545 * Lenovo Carbon X1 2014 (2nd Gen). 3546 */ 3547 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3548 "MHKA", "dd", 2)) { 3549 if (hotkey_adaptive_all_mask != 0) { 3550 tp_features.has_adaptive_kbd = true; 3551 res = sysfs_create_group( 3552 &tpacpi_pdev->dev.kobj, 3553 &adaptive_kbd_attr_group); 3554 if (res) 3555 goto err_exit; 3556 } 3557 } else { 3558 tp_features.has_adaptive_kbd = false; 3559 hotkey_adaptive_all_mask = 0x0U; 3560 } 3561 break; 3562 3563 default: 3564 pr_err("unknown version of the HKEY interface: 0x%x\n", 3565 hkeyv); 3566 pr_err("please report this to %s\n", TPACPI_MAIL); 3567 break; 3568 } 3569 } 3570 3571 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3572 "hotkey masks are %s\n", 3573 str_supported(tp_features.hotkey_mask)); 3574 3575 /* Init hotkey_all_mask if not initialized yet */ 3576 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3577 (quirks & TPACPI_HK_Q_INIMASK)) 3578 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3579 3580 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3581 if (tp_features.hotkey_mask) { 3582 /* hotkey_source_mask *must* be zero for 3583 * the first hotkey_mask_get to return hotkey_orig_mask */ 3584 res = hotkey_mask_get(); 3585 if (res) 3586 goto err_exit; 3587 3588 hotkey_orig_mask = hotkey_acpi_mask; 3589 } else { 3590 hotkey_orig_mask = hotkey_all_mask; 3591 hotkey_acpi_mask = hotkey_all_mask; 3592 } 3593 3594 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3595 if (dbg_wlswemul) { 3596 tp_features.hotkey_wlsw = 1; 3597 radiosw_state = !!tpacpi_wlsw_emulstate; 3598 pr_info("radio switch emulation enabled\n"); 3599 } else 3600 #endif 3601 /* Not all thinkpads have a hardware radio switch */ 3602 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3603 tp_features.hotkey_wlsw = 1; 3604 radiosw_state = !!status; 3605 pr_info("radio switch found; radios are %s\n", 3606 enabled(status, 0)); 3607 } 3608 if (tp_features.hotkey_wlsw) 3609 res = add_to_attr_set(hotkey_dev_attributes, 3610 &dev_attr_hotkey_radio_sw.attr); 3611 3612 res = hotkey_init_tablet_mode(); 3613 if (res < 0) 3614 goto err_exit; 3615 3616 tabletsw_state = res; 3617 3618 res = register_attr_set_with_sysfs(hotkey_dev_attributes, 3619 &tpacpi_pdev->dev.kobj); 3620 if (res) 3621 goto err_exit; 3622 3623 /* Set up key map */ 3624 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3625 ARRAY_SIZE(tpacpi_keymap_qtable)); 3626 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3627 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3628 "using keymap number %lu\n", keymap_id); 3629 3630 hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id], 3631 TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL); 3632 if (!hotkey_keycode_map) { 3633 pr_err("failed to allocate memory for key map\n"); 3634 res = -ENOMEM; 3635 goto err_exit; 3636 } 3637 3638 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3639 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3640 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3641 tpacpi_inputdev->keycode = hotkey_keycode_map; 3642 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3643 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3644 input_set_capability(tpacpi_inputdev, EV_KEY, 3645 hotkey_keycode_map[i]); 3646 } else { 3647 if (i < sizeof(hotkey_reserved_mask)*8) 3648 hotkey_reserved_mask |= 1 << i; 3649 } 3650 } 3651 3652 if (tp_features.hotkey_wlsw) { 3653 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3654 input_report_switch(tpacpi_inputdev, 3655 SW_RFKILL_ALL, radiosw_state); 3656 } 3657 if (tp_features.hotkey_tablet) { 3658 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3659 input_report_switch(tpacpi_inputdev, 3660 SW_TABLET_MODE, tabletsw_state); 3661 } 3662 3663 /* Do not issue duplicate brightness change events to 3664 * userspace. tpacpi_detect_brightness_capabilities() must have 3665 * been called before this point */ 3666 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3667 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n"); 3668 pr_notice("Disabling thinkpad-acpi brightness events by default...\n"); 3669 3670 /* Disable brightness up/down on Lenovo thinkpads when 3671 * ACPI is handling them, otherwise it is plain impossible 3672 * for userspace to do something even remotely sane */ 3673 hotkey_reserved_mask |= 3674 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3675 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3676 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3677 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3678 } 3679 3680 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3681 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3682 & ~hotkey_all_mask 3683 & ~hotkey_reserved_mask; 3684 3685 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3686 "hotkey source mask 0x%08x, polling freq %u\n", 3687 hotkey_source_mask, hotkey_poll_freq); 3688 #endif 3689 3690 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3691 "enabling firmware HKEY event interface...\n"); 3692 res = hotkey_status_set(true); 3693 if (res) { 3694 hotkey_exit(); 3695 return res; 3696 } 3697 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3698 | hotkey_driver_mask) 3699 & ~hotkey_source_mask); 3700 if (res < 0 && res != -ENXIO) { 3701 hotkey_exit(); 3702 return res; 3703 } 3704 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3705 & ~hotkey_reserved_mask; 3706 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3707 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3708 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3709 3710 tpacpi_inputdev->open = &hotkey_inputdev_open; 3711 tpacpi_inputdev->close = &hotkey_inputdev_close; 3712 3713 hotkey_poll_setup_safe(true); 3714 3715 return 0; 3716 3717 err_exit: 3718 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3719 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3720 &adaptive_kbd_attr_group); 3721 3722 hotkey_dev_attributes = NULL; 3723 3724 return (res < 0) ? res : 1; 3725 } 3726 3727 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3728 * mode, Web conference mode, Function mode and Lay-flat mode. 3729 * We support Home mode and Function mode currently. 3730 * 3731 * Will consider support rest of modes in future. 3732 * 3733 */ 3734 static const int adaptive_keyboard_modes[] = { 3735 HOME_MODE, 3736 /* WEB_BROWSER_MODE = 2, 3737 WEB_CONFERENCE_MODE = 3, */ 3738 FUNCTION_MODE 3739 }; 3740 3741 #define DFR_CHANGE_ROW 0x101 3742 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3743 #define FIRST_ADAPTIVE_KEY 0x103 3744 3745 /* press Fn key a while second, it will switch to Function Mode. Then 3746 * release Fn key, previous mode be restored. 3747 */ 3748 static bool adaptive_keyboard_mode_is_saved; 3749 static int adaptive_keyboard_prev_mode; 3750 3751 static int adaptive_keyboard_get_mode(void) 3752 { 3753 int mode = 0; 3754 3755 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3756 pr_err("Cannot read adaptive keyboard mode\n"); 3757 return -EIO; 3758 } 3759 3760 return mode; 3761 } 3762 3763 static int adaptive_keyboard_set_mode(int new_mode) 3764 { 3765 if (new_mode < 0 || 3766 new_mode > LAYFLAT_MODE) 3767 return -EINVAL; 3768 3769 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3770 pr_err("Cannot set adaptive keyboard mode\n"); 3771 return -EIO; 3772 } 3773 3774 return 0; 3775 } 3776 3777 static int adaptive_keyboard_get_next_mode(int mode) 3778 { 3779 size_t i; 3780 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3781 3782 for (i = 0; i <= max_mode; i++) { 3783 if (adaptive_keyboard_modes[i] == mode) 3784 break; 3785 } 3786 3787 if (i >= max_mode) 3788 i = 0; 3789 else 3790 i++; 3791 3792 return adaptive_keyboard_modes[i]; 3793 } 3794 3795 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3796 { 3797 int current_mode = 0; 3798 int new_mode = 0; 3799 int keycode; 3800 3801 switch (scancode) { 3802 case DFR_CHANGE_ROW: 3803 if (adaptive_keyboard_mode_is_saved) { 3804 new_mode = adaptive_keyboard_prev_mode; 3805 adaptive_keyboard_mode_is_saved = false; 3806 } else { 3807 current_mode = adaptive_keyboard_get_mode(); 3808 if (current_mode < 0) 3809 return false; 3810 new_mode = adaptive_keyboard_get_next_mode( 3811 current_mode); 3812 } 3813 3814 if (adaptive_keyboard_set_mode(new_mode) < 0) 3815 return false; 3816 3817 return true; 3818 3819 case DFR_SHOW_QUICKVIEW_ROW: 3820 current_mode = adaptive_keyboard_get_mode(); 3821 if (current_mode < 0) 3822 return false; 3823 3824 adaptive_keyboard_prev_mode = current_mode; 3825 adaptive_keyboard_mode_is_saved = true; 3826 3827 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3828 return false; 3829 return true; 3830 3831 default: 3832 if (scancode < FIRST_ADAPTIVE_KEY || 3833 scancode >= FIRST_ADAPTIVE_KEY + 3834 TP_ACPI_HOTKEYSCAN_EXTENDED_START - 3835 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3836 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3837 scancode); 3838 return false; 3839 } 3840 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + 3841 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START]; 3842 if (keycode != KEY_RESERVED) { 3843 mutex_lock(&tpacpi_inputdev_send_mutex); 3844 3845 input_report_key(tpacpi_inputdev, keycode, 1); 3846 input_sync(tpacpi_inputdev); 3847 3848 input_report_key(tpacpi_inputdev, keycode, 0); 3849 input_sync(tpacpi_inputdev); 3850 3851 mutex_unlock(&tpacpi_inputdev_send_mutex); 3852 } 3853 return true; 3854 } 3855 } 3856 3857 static bool hotkey_notify_hotkey(const u32 hkey, 3858 bool *send_acpi_ev, 3859 bool *ignore_acpi_ev) 3860 { 3861 /* 0x1000-0x1FFF: key presses */ 3862 unsigned int scancode = hkey & 0xfff; 3863 *send_acpi_ev = true; 3864 *ignore_acpi_ev = false; 3865 3866 /* 3867 * Original events are in the 0x10XX range, the adaptive keyboard 3868 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017 3869 * models, additional keys are emitted through 0x13XX. 3870 */ 3871 switch ((hkey >> 8) & 0xf) { 3872 case 0: 3873 if (scancode > 0 && 3874 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3875 /* HKEY event 0x1001 is scancode 0x00 */ 3876 scancode--; 3877 if (!(hotkey_source_mask & (1 << scancode))) { 3878 tpacpi_input_send_key_masked(scancode); 3879 *send_acpi_ev = false; 3880 } else { 3881 *ignore_acpi_ev = true; 3882 } 3883 return true; 3884 } 3885 break; 3886 3887 case 1: 3888 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3889 3890 case 3: 3891 /* Extended keycodes start at 0x300 and our offset into the map 3892 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode 3893 * will be positive, but might not be in the correct range. 3894 */ 3895 scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START); 3896 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START && 3897 scancode < TPACPI_HOTKEY_MAP_LEN) { 3898 tpacpi_input_send_key(scancode); 3899 return true; 3900 } 3901 break; 3902 } 3903 3904 return false; 3905 } 3906 3907 static bool hotkey_notify_wakeup(const u32 hkey, 3908 bool *send_acpi_ev, 3909 bool *ignore_acpi_ev) 3910 { 3911 /* 0x2000-0x2FFF: Wakeup reason */ 3912 *send_acpi_ev = true; 3913 *ignore_acpi_ev = false; 3914 3915 switch (hkey) { 3916 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3917 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3918 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3919 *ignore_acpi_ev = true; 3920 break; 3921 3922 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3923 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3924 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3925 *ignore_acpi_ev = true; 3926 break; 3927 3928 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3929 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3930 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3931 /* how to auto-heal: */ 3932 /* 2313: woke up from S3, go to S4/S5 */ 3933 /* 2413: woke up from S4, go to S5 */ 3934 break; 3935 3936 default: 3937 return false; 3938 } 3939 3940 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3941 pr_info("woke up due to a hot-unplug request...\n"); 3942 hotkey_wakeup_reason_notify_change(); 3943 } 3944 return true; 3945 } 3946 3947 static bool hotkey_notify_dockevent(const u32 hkey, 3948 bool *send_acpi_ev, 3949 bool *ignore_acpi_ev) 3950 { 3951 /* 0x4000-0x4FFF: dock-related events */ 3952 *send_acpi_ev = true; 3953 *ignore_acpi_ev = false; 3954 3955 switch (hkey) { 3956 case TP_HKEY_EV_UNDOCK_ACK: 3957 /* ACPI undock operation completed after wakeup */ 3958 hotkey_autosleep_ack = 1; 3959 pr_info("undocked\n"); 3960 hotkey_wakeup_hotunplug_complete_notify_change(); 3961 return true; 3962 3963 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3964 pr_info("docked into hotplug port replicator\n"); 3965 return true; 3966 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3967 pr_info("undocked from hotplug port replicator\n"); 3968 return true; 3969 3970 default: 3971 return false; 3972 } 3973 } 3974 3975 static bool hotkey_notify_usrevent(const u32 hkey, 3976 bool *send_acpi_ev, 3977 bool *ignore_acpi_ev) 3978 { 3979 /* 0x5000-0x5FFF: human interface helpers */ 3980 *send_acpi_ev = true; 3981 *ignore_acpi_ev = false; 3982 3983 switch (hkey) { 3984 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3985 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3986 return true; 3987 3988 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3989 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3990 tpacpi_input_send_tabletsw(); 3991 hotkey_tablet_mode_notify_change(); 3992 *send_acpi_ev = false; 3993 return true; 3994 3995 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3996 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3997 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3998 /* do not propagate these events */ 3999 *ignore_acpi_ev = true; 4000 return true; 4001 4002 default: 4003 return false; 4004 } 4005 } 4006 4007 static void thermal_dump_all_sensors(void); 4008 4009 static bool hotkey_notify_6xxx(const u32 hkey, 4010 bool *send_acpi_ev, 4011 bool *ignore_acpi_ev) 4012 { 4013 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 4014 *send_acpi_ev = true; 4015 *ignore_acpi_ev = false; 4016 4017 switch (hkey) { 4018 case TP_HKEY_EV_THM_TABLE_CHANGED: 4019 pr_debug("EC reports: Thermal Table has changed\n"); 4020 /* recommended action: do nothing, we don't have 4021 * Lenovo ATM information */ 4022 return true; 4023 case TP_HKEY_EV_THM_CSM_COMPLETED: 4024 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n"); 4025 /* recommended action: do nothing, we don't have 4026 * Lenovo ATM information */ 4027 return true; 4028 case TP_HKEY_EV_THM_TRANSFM_CHANGED: 4029 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n"); 4030 /* recommended action: do nothing, we don't have 4031 * Lenovo ATM information */ 4032 return true; 4033 case TP_HKEY_EV_ALARM_BAT_HOT: 4034 pr_crit("THERMAL ALARM: battery is too hot!\n"); 4035 /* recommended action: warn user through gui */ 4036 break; 4037 case TP_HKEY_EV_ALARM_BAT_XHOT: 4038 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 4039 /* recommended action: immediate sleep/hibernate */ 4040 break; 4041 case TP_HKEY_EV_ALARM_SENSOR_HOT: 4042 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n"); 4043 /* recommended action: warn user through gui, that */ 4044 /* some internal component is too hot */ 4045 break; 4046 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 4047 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n"); 4048 /* recommended action: immediate sleep/hibernate */ 4049 break; 4050 case TP_HKEY_EV_AC_CHANGED: 4051 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 4052 * AC status changed; can be triggered by plugging or 4053 * unplugging AC adapter, docking or undocking. */ 4054 4055 /* fallthrough */ 4056 4057 case TP_HKEY_EV_KEY_NUMLOCK: 4058 case TP_HKEY_EV_KEY_FN: 4059 case TP_HKEY_EV_KEY_FN_ESC: 4060 /* key press events, we just ignore them as long as the EC 4061 * is still reporting them in the normal keyboard stream */ 4062 *send_acpi_ev = false; 4063 *ignore_acpi_ev = true; 4064 return true; 4065 4066 case TP_HKEY_EV_TABLET_CHANGED: 4067 tpacpi_input_send_tabletsw(); 4068 hotkey_tablet_mode_notify_change(); 4069 *send_acpi_ev = false; 4070 return true; 4071 4072 case TP_HKEY_EV_PALM_DETECTED: 4073 case TP_HKEY_EV_PALM_UNDETECTED: 4074 /* palm detected hovering the keyboard, forward to user-space 4075 * via netlink for consumption */ 4076 return true; 4077 4078 default: 4079 /* report simply as unknown, no sensor dump */ 4080 return false; 4081 } 4082 4083 thermal_dump_all_sensors(); 4084 return true; 4085 } 4086 4087 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 4088 { 4089 u32 hkey; 4090 bool send_acpi_ev; 4091 bool ignore_acpi_ev; 4092 bool known_ev; 4093 4094 if (event != 0x80) { 4095 pr_err("unknown HKEY notification event %d\n", event); 4096 /* forward it to userspace, maybe it knows how to handle it */ 4097 acpi_bus_generate_netlink_event( 4098 ibm->acpi->device->pnp.device_class, 4099 dev_name(&ibm->acpi->device->dev), 4100 event, 0); 4101 return; 4102 } 4103 4104 while (1) { 4105 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 4106 pr_err("failed to retrieve HKEY event\n"); 4107 return; 4108 } 4109 4110 if (hkey == 0) { 4111 /* queue empty */ 4112 return; 4113 } 4114 4115 send_acpi_ev = true; 4116 ignore_acpi_ev = false; 4117 4118 switch (hkey >> 12) { 4119 case 1: 4120 /* 0x1000-0x1FFF: key presses */ 4121 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 4122 &ignore_acpi_ev); 4123 break; 4124 case 2: 4125 /* 0x2000-0x2FFF: Wakeup reason */ 4126 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 4127 &ignore_acpi_ev); 4128 break; 4129 case 3: 4130 /* 0x3000-0x3FFF: bay-related wakeups */ 4131 switch (hkey) { 4132 case TP_HKEY_EV_BAYEJ_ACK: 4133 hotkey_autosleep_ack = 1; 4134 pr_info("bay ejected\n"); 4135 hotkey_wakeup_hotunplug_complete_notify_change(); 4136 known_ev = true; 4137 break; 4138 case TP_HKEY_EV_OPTDRV_EJ: 4139 /* FIXME: kick libata if SATA link offline */ 4140 known_ev = true; 4141 break; 4142 default: 4143 known_ev = false; 4144 } 4145 break; 4146 case 4: 4147 /* 0x4000-0x4FFF: dock-related events */ 4148 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 4149 &ignore_acpi_ev); 4150 break; 4151 case 5: 4152 /* 0x5000-0x5FFF: human interface helpers */ 4153 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 4154 &ignore_acpi_ev); 4155 break; 4156 case 6: 4157 /* 0x6000-0x6FFF: thermal alarms/notices and 4158 * keyboard events */ 4159 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 4160 &ignore_acpi_ev); 4161 break; 4162 case 7: 4163 /* 0x7000-0x7FFF: misc */ 4164 if (tp_features.hotkey_wlsw && 4165 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 4166 tpacpi_send_radiosw_update(); 4167 send_acpi_ev = 0; 4168 known_ev = true; 4169 break; 4170 } 4171 /* fallthrough - to default */ 4172 default: 4173 known_ev = false; 4174 } 4175 if (!known_ev) { 4176 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4177 pr_notice("please report the conditions when this event happened to %s\n", 4178 TPACPI_MAIL); 4179 } 4180 4181 /* netlink events */ 4182 if (!ignore_acpi_ev && send_acpi_ev) { 4183 acpi_bus_generate_netlink_event( 4184 ibm->acpi->device->pnp.device_class, 4185 dev_name(&ibm->acpi->device->dev), 4186 event, hkey); 4187 } 4188 } 4189 } 4190 4191 static void hotkey_suspend(void) 4192 { 4193 /* Do these on suspend, we get the events on early resume! */ 4194 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4195 hotkey_autosleep_ack = 0; 4196 4197 /* save previous mode of adaptive keyboard of X1 Carbon */ 4198 if (tp_features.has_adaptive_kbd) { 4199 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4200 "GTRW", "dd", 0)) { 4201 pr_err("Cannot read adaptive keyboard mode.\n"); 4202 } 4203 } 4204 } 4205 4206 static void hotkey_resume(void) 4207 { 4208 tpacpi_disable_brightness_delay(); 4209 4210 if (hotkey_status_set(true) < 0 || 4211 hotkey_mask_set(hotkey_acpi_mask) < 0) 4212 pr_err("error while attempting to reset the event firmware interface\n"); 4213 4214 tpacpi_send_radiosw_update(); 4215 hotkey_tablet_mode_notify_change(); 4216 hotkey_wakeup_reason_notify_change(); 4217 hotkey_wakeup_hotunplug_complete_notify_change(); 4218 hotkey_poll_setup_safe(false); 4219 4220 /* restore previous mode of adapive keyboard of X1 Carbon */ 4221 if (tp_features.has_adaptive_kbd) { 4222 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4223 adaptive_keyboard_prev_mode)) { 4224 pr_err("Cannot set adaptive keyboard mode.\n"); 4225 } 4226 } 4227 } 4228 4229 /* procfs -------------------------------------------------------------- */ 4230 static int hotkey_read(struct seq_file *m) 4231 { 4232 int res, status; 4233 4234 if (!tp_features.hotkey) { 4235 seq_printf(m, "status:\t\tnot supported\n"); 4236 return 0; 4237 } 4238 4239 if (mutex_lock_killable(&hotkey_mutex)) 4240 return -ERESTARTSYS; 4241 res = hotkey_status_get(&status); 4242 if (!res) 4243 res = hotkey_mask_get(); 4244 mutex_unlock(&hotkey_mutex); 4245 if (res) 4246 return res; 4247 4248 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4249 if (hotkey_all_mask) { 4250 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4251 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4252 } else { 4253 seq_printf(m, "mask:\t\tnot supported\n"); 4254 seq_printf(m, "commands:\tenable, disable, reset\n"); 4255 } 4256 4257 return 0; 4258 } 4259 4260 static void hotkey_enabledisable_warn(bool enable) 4261 { 4262 tpacpi_log_usertask("procfs hotkey enable/disable"); 4263 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4264 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n"))) 4265 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n"); 4266 } 4267 4268 static int hotkey_write(char *buf) 4269 { 4270 int res; 4271 u32 mask; 4272 char *cmd; 4273 4274 if (!tp_features.hotkey) 4275 return -ENODEV; 4276 4277 if (mutex_lock_killable(&hotkey_mutex)) 4278 return -ERESTARTSYS; 4279 4280 mask = hotkey_user_mask; 4281 4282 res = 0; 4283 while ((cmd = strsep(&buf, ","))) { 4284 if (strlencmp(cmd, "enable") == 0) { 4285 hotkey_enabledisable_warn(1); 4286 } else if (strlencmp(cmd, "disable") == 0) { 4287 hotkey_enabledisable_warn(0); 4288 res = -EPERM; 4289 } else if (strlencmp(cmd, "reset") == 0) { 4290 mask = (hotkey_all_mask | hotkey_source_mask) 4291 & ~hotkey_reserved_mask; 4292 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4293 /* mask set */ 4294 } else if (sscanf(cmd, "%x", &mask) == 1) { 4295 /* mask set */ 4296 } else { 4297 res = -EINVAL; 4298 goto errexit; 4299 } 4300 } 4301 4302 if (!res) { 4303 tpacpi_disclose_usertask("procfs hotkey", 4304 "set mask to 0x%08x\n", mask); 4305 res = hotkey_user_mask_set(mask); 4306 } 4307 4308 errexit: 4309 mutex_unlock(&hotkey_mutex); 4310 return res; 4311 } 4312 4313 static const struct acpi_device_id ibm_htk_device_ids[] = { 4314 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4315 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4316 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0}, 4317 {"", 0}, 4318 }; 4319 4320 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4321 .hid = ibm_htk_device_ids, 4322 .notify = hotkey_notify, 4323 .handle = &hkey_handle, 4324 .type = ACPI_DEVICE_NOTIFY, 4325 }; 4326 4327 static struct ibm_struct hotkey_driver_data = { 4328 .name = "hotkey", 4329 .read = hotkey_read, 4330 .write = hotkey_write, 4331 .exit = hotkey_exit, 4332 .resume = hotkey_resume, 4333 .suspend = hotkey_suspend, 4334 .acpi = &ibm_hotkey_acpidriver, 4335 }; 4336 4337 /************************************************************************* 4338 * Bluetooth subdriver 4339 */ 4340 4341 enum { 4342 /* ACPI GBDC/SBDC bits */ 4343 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4344 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4345 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4346 0 = disable, 1 = enable */ 4347 }; 4348 4349 enum { 4350 /* ACPI \BLTH commands */ 4351 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4352 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4353 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4354 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4355 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4356 }; 4357 4358 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4359 4360 static int bluetooth_get_status(void) 4361 { 4362 int status; 4363 4364 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4365 if (dbg_bluetoothemul) 4366 return (tpacpi_bluetooth_emulstate) ? 4367 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4368 #endif 4369 4370 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4371 return -EIO; 4372 4373 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4374 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4375 } 4376 4377 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4378 { 4379 int status; 4380 4381 vdbg_printk(TPACPI_DBG_RFKILL, 4382 "will attempt to %s bluetooth\n", 4383 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4384 4385 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4386 if (dbg_bluetoothemul) { 4387 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4388 return 0; 4389 } 4390 #endif 4391 4392 if (state == TPACPI_RFK_RADIO_ON) 4393 status = TP_ACPI_BLUETOOTH_RADIOSSW 4394 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4395 else 4396 status = 0; 4397 4398 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4399 return -EIO; 4400 4401 return 0; 4402 } 4403 4404 /* sysfs bluetooth enable ---------------------------------------------- */ 4405 static ssize_t bluetooth_enable_show(struct device *dev, 4406 struct device_attribute *attr, 4407 char *buf) 4408 { 4409 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4410 attr, buf); 4411 } 4412 4413 static ssize_t bluetooth_enable_store(struct device *dev, 4414 struct device_attribute *attr, 4415 const char *buf, size_t count) 4416 { 4417 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4418 attr, buf, count); 4419 } 4420 4421 static DEVICE_ATTR_RW(bluetooth_enable); 4422 4423 /* --------------------------------------------------------------------- */ 4424 4425 static struct attribute *bluetooth_attributes[] = { 4426 &dev_attr_bluetooth_enable.attr, 4427 NULL 4428 }; 4429 4430 static const struct attribute_group bluetooth_attr_group = { 4431 .attrs = bluetooth_attributes, 4432 }; 4433 4434 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4435 .get_status = bluetooth_get_status, 4436 .set_status = bluetooth_set_status, 4437 }; 4438 4439 static void bluetooth_shutdown(void) 4440 { 4441 /* Order firmware to save current state to NVRAM */ 4442 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4443 TP_ACPI_BLTH_SAVE_STATE)) 4444 pr_notice("failed to save bluetooth state to NVRAM\n"); 4445 else 4446 vdbg_printk(TPACPI_DBG_RFKILL, 4447 "bluetooth state saved to NVRAM\n"); 4448 } 4449 4450 static void bluetooth_exit(void) 4451 { 4452 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4453 &bluetooth_attr_group); 4454 4455 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4456 4457 bluetooth_shutdown(); 4458 } 4459 4460 static const struct dmi_system_id bt_fwbug_list[] __initconst = { 4461 { 4462 .ident = "ThinkPad E485", 4463 .matches = { 4464 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4465 DMI_MATCH(DMI_BOARD_NAME, "20KU"), 4466 }, 4467 }, 4468 { 4469 .ident = "ThinkPad E585", 4470 .matches = { 4471 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4472 DMI_MATCH(DMI_BOARD_NAME, "20KV"), 4473 }, 4474 }, 4475 { 4476 .ident = "ThinkPad A285 - 20MW", 4477 .matches = { 4478 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4479 DMI_MATCH(DMI_BOARD_NAME, "20MW"), 4480 }, 4481 }, 4482 { 4483 .ident = "ThinkPad A285 - 20MX", 4484 .matches = { 4485 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4486 DMI_MATCH(DMI_BOARD_NAME, "20MX"), 4487 }, 4488 }, 4489 { 4490 .ident = "ThinkPad A485 - 20MU", 4491 .matches = { 4492 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4493 DMI_MATCH(DMI_BOARD_NAME, "20MU"), 4494 }, 4495 }, 4496 { 4497 .ident = "ThinkPad A485 - 20MV", 4498 .matches = { 4499 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4500 DMI_MATCH(DMI_BOARD_NAME, "20MV"), 4501 }, 4502 }, 4503 {} 4504 }; 4505 4506 static const struct pci_device_id fwbug_cards_ids[] __initconst = { 4507 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) }, 4508 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) }, 4509 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) }, 4510 {} 4511 }; 4512 4513 4514 static int __init have_bt_fwbug(void) 4515 { 4516 /* 4517 * Some AMD based ThinkPads have a firmware bug that calling 4518 * "GBDC" will cause bluetooth on Intel wireless cards blocked 4519 */ 4520 if (dmi_check_system(bt_fwbug_list) && pci_dev_present(fwbug_cards_ids)) { 4521 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4522 FW_BUG "disable bluetooth subdriver for Intel cards\n"); 4523 return 1; 4524 } else 4525 return 0; 4526 } 4527 4528 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4529 { 4530 int res; 4531 int status = 0; 4532 4533 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4534 "initializing bluetooth subdriver\n"); 4535 4536 TPACPI_ACPIHANDLE_INIT(hkey); 4537 4538 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4539 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4540 tp_features.bluetooth = !have_bt_fwbug() && hkey_handle && 4541 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4542 4543 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4544 "bluetooth is %s, status 0x%02x\n", 4545 str_supported(tp_features.bluetooth), 4546 status); 4547 4548 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4549 if (dbg_bluetoothemul) { 4550 tp_features.bluetooth = 1; 4551 pr_info("bluetooth switch emulation enabled\n"); 4552 } else 4553 #endif 4554 if (tp_features.bluetooth && 4555 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4556 /* no bluetooth hardware present in system */ 4557 tp_features.bluetooth = 0; 4558 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4559 "bluetooth hardware not installed\n"); 4560 } 4561 4562 if (!tp_features.bluetooth) 4563 return 1; 4564 4565 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4566 &bluetooth_tprfk_ops, 4567 RFKILL_TYPE_BLUETOOTH, 4568 TPACPI_RFK_BLUETOOTH_SW_NAME, 4569 true); 4570 if (res) 4571 return res; 4572 4573 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4574 &bluetooth_attr_group); 4575 if (res) { 4576 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4577 return res; 4578 } 4579 4580 return 0; 4581 } 4582 4583 /* procfs -------------------------------------------------------------- */ 4584 static int bluetooth_read(struct seq_file *m) 4585 { 4586 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4587 } 4588 4589 static int bluetooth_write(char *buf) 4590 { 4591 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4592 } 4593 4594 static struct ibm_struct bluetooth_driver_data = { 4595 .name = "bluetooth", 4596 .read = bluetooth_read, 4597 .write = bluetooth_write, 4598 .exit = bluetooth_exit, 4599 .shutdown = bluetooth_shutdown, 4600 }; 4601 4602 /************************************************************************* 4603 * Wan subdriver 4604 */ 4605 4606 enum { 4607 /* ACPI GWAN/SWAN bits */ 4608 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4609 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4610 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4611 0 = disable, 1 = enable */ 4612 }; 4613 4614 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4615 4616 static int wan_get_status(void) 4617 { 4618 int status; 4619 4620 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4621 if (dbg_wwanemul) 4622 return (tpacpi_wwan_emulstate) ? 4623 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4624 #endif 4625 4626 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4627 return -EIO; 4628 4629 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4630 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4631 } 4632 4633 static int wan_set_status(enum tpacpi_rfkill_state state) 4634 { 4635 int status; 4636 4637 vdbg_printk(TPACPI_DBG_RFKILL, 4638 "will attempt to %s wwan\n", 4639 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4640 4641 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4642 if (dbg_wwanemul) { 4643 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4644 return 0; 4645 } 4646 #endif 4647 4648 if (state == TPACPI_RFK_RADIO_ON) 4649 status = TP_ACPI_WANCARD_RADIOSSW 4650 | TP_ACPI_WANCARD_RESUMECTRL; 4651 else 4652 status = 0; 4653 4654 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4655 return -EIO; 4656 4657 return 0; 4658 } 4659 4660 /* sysfs wan enable ---------------------------------------------------- */ 4661 static ssize_t wan_enable_show(struct device *dev, 4662 struct device_attribute *attr, 4663 char *buf) 4664 { 4665 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4666 attr, buf); 4667 } 4668 4669 static ssize_t wan_enable_store(struct device *dev, 4670 struct device_attribute *attr, 4671 const char *buf, size_t count) 4672 { 4673 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4674 attr, buf, count); 4675 } 4676 4677 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4678 wan_enable_show, wan_enable_store); 4679 4680 /* --------------------------------------------------------------------- */ 4681 4682 static struct attribute *wan_attributes[] = { 4683 &dev_attr_wwan_enable.attr, 4684 NULL 4685 }; 4686 4687 static const struct attribute_group wan_attr_group = { 4688 .attrs = wan_attributes, 4689 }; 4690 4691 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4692 .get_status = wan_get_status, 4693 .set_status = wan_set_status, 4694 }; 4695 4696 static void wan_shutdown(void) 4697 { 4698 /* Order firmware to save current state to NVRAM */ 4699 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4700 TP_ACPI_WGSV_SAVE_STATE)) 4701 pr_notice("failed to save WWAN state to NVRAM\n"); 4702 else 4703 vdbg_printk(TPACPI_DBG_RFKILL, 4704 "WWAN state saved to NVRAM\n"); 4705 } 4706 4707 static void wan_exit(void) 4708 { 4709 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4710 &wan_attr_group); 4711 4712 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4713 4714 wan_shutdown(); 4715 } 4716 4717 static int __init wan_init(struct ibm_init_struct *iibm) 4718 { 4719 int res; 4720 int status = 0; 4721 4722 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4723 "initializing wan subdriver\n"); 4724 4725 TPACPI_ACPIHANDLE_INIT(hkey); 4726 4727 tp_features.wan = hkey_handle && 4728 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4729 4730 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4731 "wan is %s, status 0x%02x\n", 4732 str_supported(tp_features.wan), 4733 status); 4734 4735 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4736 if (dbg_wwanemul) { 4737 tp_features.wan = 1; 4738 pr_info("wwan switch emulation enabled\n"); 4739 } else 4740 #endif 4741 if (tp_features.wan && 4742 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4743 /* no wan hardware present in system */ 4744 tp_features.wan = 0; 4745 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4746 "wan hardware not installed\n"); 4747 } 4748 4749 if (!tp_features.wan) 4750 return 1; 4751 4752 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4753 &wan_tprfk_ops, 4754 RFKILL_TYPE_WWAN, 4755 TPACPI_RFK_WWAN_SW_NAME, 4756 true); 4757 if (res) 4758 return res; 4759 4760 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4761 &wan_attr_group); 4762 4763 if (res) { 4764 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4765 return res; 4766 } 4767 4768 return 0; 4769 } 4770 4771 /* procfs -------------------------------------------------------------- */ 4772 static int wan_read(struct seq_file *m) 4773 { 4774 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4775 } 4776 4777 static int wan_write(char *buf) 4778 { 4779 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4780 } 4781 4782 static struct ibm_struct wan_driver_data = { 4783 .name = "wan", 4784 .read = wan_read, 4785 .write = wan_write, 4786 .exit = wan_exit, 4787 .shutdown = wan_shutdown, 4788 }; 4789 4790 /************************************************************************* 4791 * UWB subdriver 4792 */ 4793 4794 enum { 4795 /* ACPI GUWB/SUWB bits */ 4796 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4797 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4798 }; 4799 4800 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4801 4802 static int uwb_get_status(void) 4803 { 4804 int status; 4805 4806 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4807 if (dbg_uwbemul) 4808 return (tpacpi_uwb_emulstate) ? 4809 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4810 #endif 4811 4812 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4813 return -EIO; 4814 4815 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4816 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4817 } 4818 4819 static int uwb_set_status(enum tpacpi_rfkill_state state) 4820 { 4821 int status; 4822 4823 vdbg_printk(TPACPI_DBG_RFKILL, 4824 "will attempt to %s UWB\n", 4825 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4826 4827 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4828 if (dbg_uwbemul) { 4829 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4830 return 0; 4831 } 4832 #endif 4833 4834 if (state == TPACPI_RFK_RADIO_ON) 4835 status = TP_ACPI_UWB_RADIOSSW; 4836 else 4837 status = 0; 4838 4839 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4840 return -EIO; 4841 4842 return 0; 4843 } 4844 4845 /* --------------------------------------------------------------------- */ 4846 4847 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4848 .get_status = uwb_get_status, 4849 .set_status = uwb_set_status, 4850 }; 4851 4852 static void uwb_exit(void) 4853 { 4854 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4855 } 4856 4857 static int __init uwb_init(struct ibm_init_struct *iibm) 4858 { 4859 int res; 4860 int status = 0; 4861 4862 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4863 "initializing uwb subdriver\n"); 4864 4865 TPACPI_ACPIHANDLE_INIT(hkey); 4866 4867 tp_features.uwb = hkey_handle && 4868 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4869 4870 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4871 "uwb is %s, status 0x%02x\n", 4872 str_supported(tp_features.uwb), 4873 status); 4874 4875 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4876 if (dbg_uwbemul) { 4877 tp_features.uwb = 1; 4878 pr_info("uwb switch emulation enabled\n"); 4879 } else 4880 #endif 4881 if (tp_features.uwb && 4882 !(status & TP_ACPI_UWB_HWPRESENT)) { 4883 /* no uwb hardware present in system */ 4884 tp_features.uwb = 0; 4885 dbg_printk(TPACPI_DBG_INIT, 4886 "uwb hardware not installed\n"); 4887 } 4888 4889 if (!tp_features.uwb) 4890 return 1; 4891 4892 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4893 &uwb_tprfk_ops, 4894 RFKILL_TYPE_UWB, 4895 TPACPI_RFK_UWB_SW_NAME, 4896 false); 4897 return res; 4898 } 4899 4900 static struct ibm_struct uwb_driver_data = { 4901 .name = "uwb", 4902 .exit = uwb_exit, 4903 .flags.experimental = 1, 4904 }; 4905 4906 /************************************************************************* 4907 * Video subdriver 4908 */ 4909 4910 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4911 4912 enum video_access_mode { 4913 TPACPI_VIDEO_NONE = 0, 4914 TPACPI_VIDEO_570, /* 570 */ 4915 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4916 TPACPI_VIDEO_NEW, /* all others */ 4917 }; 4918 4919 enum { /* video status flags, based on VIDEO_570 */ 4920 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4921 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4922 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4923 }; 4924 4925 enum { /* TPACPI_VIDEO_570 constants */ 4926 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4927 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4928 * video_status_flags */ 4929 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4930 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4931 }; 4932 4933 static enum video_access_mode video_supported; 4934 static int video_orig_autosw; 4935 4936 static int video_autosw_get(void); 4937 static int video_autosw_set(int enable); 4938 4939 TPACPI_HANDLE(vid, root, 4940 "\\_SB.PCI.AGP.VGA", /* 570 */ 4941 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4942 "\\_SB.PCI0.VID0", /* 770e */ 4943 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4944 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4945 "\\_SB.PCI0.AGP.VID", /* all others */ 4946 ); /* R30, R31 */ 4947 4948 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4949 4950 static int __init video_init(struct ibm_init_struct *iibm) 4951 { 4952 int ivga; 4953 4954 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4955 4956 TPACPI_ACPIHANDLE_INIT(vid); 4957 if (tpacpi_is_ibm()) 4958 TPACPI_ACPIHANDLE_INIT(vid2); 4959 4960 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4961 /* G41, assume IVGA doesn't change */ 4962 vid_handle = vid2_handle; 4963 4964 if (!vid_handle) 4965 /* video switching not supported on R30, R31 */ 4966 video_supported = TPACPI_VIDEO_NONE; 4967 else if (tpacpi_is_ibm() && 4968 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4969 /* 570 */ 4970 video_supported = TPACPI_VIDEO_570; 4971 else if (tpacpi_is_ibm() && 4972 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4973 /* 600e/x, 770e, 770x */ 4974 video_supported = TPACPI_VIDEO_770; 4975 else 4976 /* all others */ 4977 video_supported = TPACPI_VIDEO_NEW; 4978 4979 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4980 str_supported(video_supported != TPACPI_VIDEO_NONE), 4981 video_supported); 4982 4983 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 4984 } 4985 4986 static void video_exit(void) 4987 { 4988 dbg_printk(TPACPI_DBG_EXIT, 4989 "restoring original video autoswitch mode\n"); 4990 if (video_autosw_set(video_orig_autosw)) 4991 pr_err("error while trying to restore original video autoswitch mode\n"); 4992 } 4993 4994 static int video_outputsw_get(void) 4995 { 4996 int status = 0; 4997 int i; 4998 4999 switch (video_supported) { 5000 case TPACPI_VIDEO_570: 5001 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 5002 TP_ACPI_VIDEO_570_PHSCMD)) 5003 return -EIO; 5004 status = i & TP_ACPI_VIDEO_570_PHSMASK; 5005 break; 5006 case TPACPI_VIDEO_770: 5007 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 5008 return -EIO; 5009 if (i) 5010 status |= TP_ACPI_VIDEO_S_LCD; 5011 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 5012 return -EIO; 5013 if (i) 5014 status |= TP_ACPI_VIDEO_S_CRT; 5015 break; 5016 case TPACPI_VIDEO_NEW: 5017 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 5018 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 5019 return -EIO; 5020 if (i) 5021 status |= TP_ACPI_VIDEO_S_CRT; 5022 5023 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 5024 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 5025 return -EIO; 5026 if (i) 5027 status |= TP_ACPI_VIDEO_S_LCD; 5028 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 5029 return -EIO; 5030 if (i) 5031 status |= TP_ACPI_VIDEO_S_DVI; 5032 break; 5033 default: 5034 return -ENOSYS; 5035 } 5036 5037 return status; 5038 } 5039 5040 static int video_outputsw_set(int status) 5041 { 5042 int autosw; 5043 int res = 0; 5044 5045 switch (video_supported) { 5046 case TPACPI_VIDEO_570: 5047 res = acpi_evalf(NULL, NULL, 5048 "\\_SB.PHS2", "vdd", 5049 TP_ACPI_VIDEO_570_PHS2CMD, 5050 status | TP_ACPI_VIDEO_570_PHS2SET); 5051 break; 5052 case TPACPI_VIDEO_770: 5053 autosw = video_autosw_get(); 5054 if (autosw < 0) 5055 return autosw; 5056 5057 res = video_autosw_set(1); 5058 if (res) 5059 return res; 5060 res = acpi_evalf(vid_handle, NULL, 5061 "ASWT", "vdd", status * 0x100, 0); 5062 if (!autosw && video_autosw_set(autosw)) { 5063 pr_err("video auto-switch left enabled due to error\n"); 5064 return -EIO; 5065 } 5066 break; 5067 case TPACPI_VIDEO_NEW: 5068 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 5069 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 5070 break; 5071 default: 5072 return -ENOSYS; 5073 } 5074 5075 return (res) ? 0 : -EIO; 5076 } 5077 5078 static int video_autosw_get(void) 5079 { 5080 int autosw = 0; 5081 5082 switch (video_supported) { 5083 case TPACPI_VIDEO_570: 5084 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 5085 return -EIO; 5086 break; 5087 case TPACPI_VIDEO_770: 5088 case TPACPI_VIDEO_NEW: 5089 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 5090 return -EIO; 5091 break; 5092 default: 5093 return -ENOSYS; 5094 } 5095 5096 return autosw & 1; 5097 } 5098 5099 static int video_autosw_set(int enable) 5100 { 5101 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 5102 return -EIO; 5103 return 0; 5104 } 5105 5106 static int video_outputsw_cycle(void) 5107 { 5108 int autosw = video_autosw_get(); 5109 int res; 5110 5111 if (autosw < 0) 5112 return autosw; 5113 5114 switch (video_supported) { 5115 case TPACPI_VIDEO_570: 5116 res = video_autosw_set(1); 5117 if (res) 5118 return res; 5119 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 5120 break; 5121 case TPACPI_VIDEO_770: 5122 case TPACPI_VIDEO_NEW: 5123 res = video_autosw_set(1); 5124 if (res) 5125 return res; 5126 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 5127 break; 5128 default: 5129 return -ENOSYS; 5130 } 5131 if (!autosw && video_autosw_set(autosw)) { 5132 pr_err("video auto-switch left enabled due to error\n"); 5133 return -EIO; 5134 } 5135 5136 return (res) ? 0 : -EIO; 5137 } 5138 5139 static int video_expand_toggle(void) 5140 { 5141 switch (video_supported) { 5142 case TPACPI_VIDEO_570: 5143 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 5144 0 : -EIO; 5145 case TPACPI_VIDEO_770: 5146 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 5147 0 : -EIO; 5148 case TPACPI_VIDEO_NEW: 5149 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 5150 0 : -EIO; 5151 default: 5152 return -ENOSYS; 5153 } 5154 /* not reached */ 5155 } 5156 5157 static int video_read(struct seq_file *m) 5158 { 5159 int status, autosw; 5160 5161 if (video_supported == TPACPI_VIDEO_NONE) { 5162 seq_printf(m, "status:\t\tnot supported\n"); 5163 return 0; 5164 } 5165 5166 /* Even reads can crash X.org, so... */ 5167 if (!capable(CAP_SYS_ADMIN)) 5168 return -EPERM; 5169 5170 status = video_outputsw_get(); 5171 if (status < 0) 5172 return status; 5173 5174 autosw = video_autosw_get(); 5175 if (autosw < 0) 5176 return autosw; 5177 5178 seq_printf(m, "status:\t\tsupported\n"); 5179 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 5180 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 5181 if (video_supported == TPACPI_VIDEO_NEW) 5182 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 5183 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 5184 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5185 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5186 if (video_supported == TPACPI_VIDEO_NEW) 5187 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5188 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5189 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5190 5191 return 0; 5192 } 5193 5194 static int video_write(char *buf) 5195 { 5196 char *cmd; 5197 int enable, disable, status; 5198 int res; 5199 5200 if (video_supported == TPACPI_VIDEO_NONE) 5201 return -ENODEV; 5202 5203 /* Even reads can crash X.org, let alone writes... */ 5204 if (!capable(CAP_SYS_ADMIN)) 5205 return -EPERM; 5206 5207 enable = 0; 5208 disable = 0; 5209 5210 while ((cmd = strsep(&buf, ","))) { 5211 if (strlencmp(cmd, "lcd_enable") == 0) { 5212 enable |= TP_ACPI_VIDEO_S_LCD; 5213 } else if (strlencmp(cmd, "lcd_disable") == 0) { 5214 disable |= TP_ACPI_VIDEO_S_LCD; 5215 } else if (strlencmp(cmd, "crt_enable") == 0) { 5216 enable |= TP_ACPI_VIDEO_S_CRT; 5217 } else if (strlencmp(cmd, "crt_disable") == 0) { 5218 disable |= TP_ACPI_VIDEO_S_CRT; 5219 } else if (video_supported == TPACPI_VIDEO_NEW && 5220 strlencmp(cmd, "dvi_enable") == 0) { 5221 enable |= TP_ACPI_VIDEO_S_DVI; 5222 } else if (video_supported == TPACPI_VIDEO_NEW && 5223 strlencmp(cmd, "dvi_disable") == 0) { 5224 disable |= TP_ACPI_VIDEO_S_DVI; 5225 } else if (strlencmp(cmd, "auto_enable") == 0) { 5226 res = video_autosw_set(1); 5227 if (res) 5228 return res; 5229 } else if (strlencmp(cmd, "auto_disable") == 0) { 5230 res = video_autosw_set(0); 5231 if (res) 5232 return res; 5233 } else if (strlencmp(cmd, "video_switch") == 0) { 5234 res = video_outputsw_cycle(); 5235 if (res) 5236 return res; 5237 } else if (strlencmp(cmd, "expand_toggle") == 0) { 5238 res = video_expand_toggle(); 5239 if (res) 5240 return res; 5241 } else 5242 return -EINVAL; 5243 } 5244 5245 if (enable || disable) { 5246 status = video_outputsw_get(); 5247 if (status < 0) 5248 return status; 5249 res = video_outputsw_set((status & ~disable) | enable); 5250 if (res) 5251 return res; 5252 } 5253 5254 return 0; 5255 } 5256 5257 static struct ibm_struct video_driver_data = { 5258 .name = "video", 5259 .read = video_read, 5260 .write = video_write, 5261 .exit = video_exit, 5262 }; 5263 5264 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5265 5266 /************************************************************************* 5267 * Keyboard backlight subdriver 5268 */ 5269 5270 static enum led_brightness kbdlight_brightness; 5271 static DEFINE_MUTEX(kbdlight_mutex); 5272 5273 static int kbdlight_set_level(int level) 5274 { 5275 int ret = 0; 5276 5277 if (!hkey_handle) 5278 return -ENXIO; 5279 5280 mutex_lock(&kbdlight_mutex); 5281 5282 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5283 ret = -EIO; 5284 else 5285 kbdlight_brightness = level; 5286 5287 mutex_unlock(&kbdlight_mutex); 5288 5289 return ret; 5290 } 5291 5292 static int kbdlight_get_level(void) 5293 { 5294 int status = 0; 5295 5296 if (!hkey_handle) 5297 return -ENXIO; 5298 5299 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5300 return -EIO; 5301 5302 if (status < 0) 5303 return status; 5304 5305 return status & 0x3; 5306 } 5307 5308 static bool kbdlight_is_supported(void) 5309 { 5310 int status = 0; 5311 5312 if (!hkey_handle) 5313 return false; 5314 5315 if (!acpi_has_method(hkey_handle, "MLCG")) { 5316 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5317 return false; 5318 } 5319 5320 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5321 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5322 return false; 5323 } 5324 5325 if (status < 0) { 5326 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5327 return false; 5328 } 5329 5330 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5331 /* 5332 * Guessed test for keyboard backlight: 5333 * 5334 * Machines with backlight keyboard return: 5335 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5336 * b110100010010000000XX - ThinkPad x230 5337 * b010100000010000000XX - ThinkPad x240 5338 * b010100000010000000XX - ThinkPad W541 5339 * (XX is current backlight level) 5340 * 5341 * Machines without backlight keyboard return: 5342 * b10100001000000000000 - ThinkPad x230 5343 * b10110001000000000000 - ThinkPad E430 5344 * b00000000000000000000 - ThinkPad E450 5345 * 5346 * Candidate BITs for detection test (XOR): 5347 * b01000000001000000000 5348 * ^ 5349 */ 5350 return status & BIT(9); 5351 } 5352 5353 static int kbdlight_sysfs_set(struct led_classdev *led_cdev, 5354 enum led_brightness brightness) 5355 { 5356 return kbdlight_set_level(brightness); 5357 } 5358 5359 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5360 { 5361 int level; 5362 5363 level = kbdlight_get_level(); 5364 if (level < 0) 5365 return 0; 5366 5367 return level; 5368 } 5369 5370 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5371 .led_classdev = { 5372 .name = "tpacpi::kbd_backlight", 5373 .max_brightness = 2, 5374 .flags = LED_BRIGHT_HW_CHANGED, 5375 .brightness_set_blocking = &kbdlight_sysfs_set, 5376 .brightness_get = &kbdlight_sysfs_get, 5377 } 5378 }; 5379 5380 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5381 { 5382 int rc; 5383 5384 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5385 5386 TPACPI_ACPIHANDLE_INIT(hkey); 5387 5388 if (!kbdlight_is_supported()) { 5389 tp_features.kbdlight = 0; 5390 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5391 return 1; 5392 } 5393 5394 kbdlight_brightness = kbdlight_sysfs_get(NULL); 5395 tp_features.kbdlight = 1; 5396 5397 rc = led_classdev_register(&tpacpi_pdev->dev, 5398 &tpacpi_led_kbdlight.led_classdev); 5399 if (rc < 0) { 5400 tp_features.kbdlight = 0; 5401 return rc; 5402 } 5403 5404 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask | 5405 TP_ACPI_HKEY_KBD_LIGHT_MASK); 5406 return 0; 5407 } 5408 5409 static void kbdlight_exit(void) 5410 { 5411 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5412 } 5413 5414 static int kbdlight_set_level_and_update(int level) 5415 { 5416 int ret; 5417 struct led_classdev *led_cdev; 5418 5419 ret = kbdlight_set_level(level); 5420 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5421 5422 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5423 led_cdev->brightness = level; 5424 5425 return ret; 5426 } 5427 5428 static int kbdlight_read(struct seq_file *m) 5429 { 5430 int level; 5431 5432 if (!tp_features.kbdlight) { 5433 seq_printf(m, "status:\t\tnot supported\n"); 5434 } else { 5435 level = kbdlight_get_level(); 5436 if (level < 0) 5437 seq_printf(m, "status:\t\terror %d\n", level); 5438 else 5439 seq_printf(m, "status:\t\t%d\n", level); 5440 seq_printf(m, "commands:\t0, 1, 2\n"); 5441 } 5442 5443 return 0; 5444 } 5445 5446 static int kbdlight_write(char *buf) 5447 { 5448 char *cmd; 5449 int res, level = -EINVAL; 5450 5451 if (!tp_features.kbdlight) 5452 return -ENODEV; 5453 5454 while ((cmd = strsep(&buf, ","))) { 5455 res = kstrtoint(cmd, 10, &level); 5456 if (res < 0) 5457 return res; 5458 } 5459 5460 if (level >= 3 || level < 0) 5461 return -EINVAL; 5462 5463 return kbdlight_set_level_and_update(level); 5464 } 5465 5466 static void kbdlight_suspend(void) 5467 { 5468 struct led_classdev *led_cdev; 5469 5470 if (!tp_features.kbdlight) 5471 return; 5472 5473 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5474 led_update_brightness(led_cdev); 5475 led_classdev_suspend(led_cdev); 5476 } 5477 5478 static void kbdlight_resume(void) 5479 { 5480 if (!tp_features.kbdlight) 5481 return; 5482 5483 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5484 } 5485 5486 static struct ibm_struct kbdlight_driver_data = { 5487 .name = "kbdlight", 5488 .read = kbdlight_read, 5489 .write = kbdlight_write, 5490 .suspend = kbdlight_suspend, 5491 .resume = kbdlight_resume, 5492 .exit = kbdlight_exit, 5493 }; 5494 5495 /************************************************************************* 5496 * Light (thinklight) subdriver 5497 */ 5498 5499 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5500 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5501 5502 static int light_get_status(void) 5503 { 5504 int status = 0; 5505 5506 if (tp_features.light_status) { 5507 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5508 return -EIO; 5509 return (!!status); 5510 } 5511 5512 return -ENXIO; 5513 } 5514 5515 static int light_set_status(int status) 5516 { 5517 int rc; 5518 5519 if (tp_features.light) { 5520 if (cmos_handle) { 5521 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5522 (status) ? 5523 TP_CMOS_THINKLIGHT_ON : 5524 TP_CMOS_THINKLIGHT_OFF); 5525 } else { 5526 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5527 (status) ? 1 : 0); 5528 } 5529 return (rc) ? 0 : -EIO; 5530 } 5531 5532 return -ENXIO; 5533 } 5534 5535 static int light_sysfs_set(struct led_classdev *led_cdev, 5536 enum led_brightness brightness) 5537 { 5538 return light_set_status((brightness != LED_OFF) ? 5539 TPACPI_LED_ON : TPACPI_LED_OFF); 5540 } 5541 5542 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5543 { 5544 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5545 } 5546 5547 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5548 .led_classdev = { 5549 .name = "tpacpi::thinklight", 5550 .brightness_set_blocking = &light_sysfs_set, 5551 .brightness_get = &light_sysfs_get, 5552 } 5553 }; 5554 5555 static int __init light_init(struct ibm_init_struct *iibm) 5556 { 5557 int rc; 5558 5559 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5560 5561 if (tpacpi_is_ibm()) { 5562 TPACPI_ACPIHANDLE_INIT(ledb); 5563 TPACPI_ACPIHANDLE_INIT(lght); 5564 } 5565 TPACPI_ACPIHANDLE_INIT(cmos); 5566 5567 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5568 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5569 5570 if (tp_features.light) 5571 /* light status not supported on 5572 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5573 tp_features.light_status = 5574 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5575 5576 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5577 str_supported(tp_features.light), 5578 str_supported(tp_features.light_status)); 5579 5580 if (!tp_features.light) 5581 return 1; 5582 5583 rc = led_classdev_register(&tpacpi_pdev->dev, 5584 &tpacpi_led_thinklight.led_classdev); 5585 5586 if (rc < 0) { 5587 tp_features.light = 0; 5588 tp_features.light_status = 0; 5589 } else { 5590 rc = 0; 5591 } 5592 5593 return rc; 5594 } 5595 5596 static void light_exit(void) 5597 { 5598 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5599 } 5600 5601 static int light_read(struct seq_file *m) 5602 { 5603 int status; 5604 5605 if (!tp_features.light) { 5606 seq_printf(m, "status:\t\tnot supported\n"); 5607 } else if (!tp_features.light_status) { 5608 seq_printf(m, "status:\t\tunknown\n"); 5609 seq_printf(m, "commands:\ton, off\n"); 5610 } else { 5611 status = light_get_status(); 5612 if (status < 0) 5613 return status; 5614 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5615 seq_printf(m, "commands:\ton, off\n"); 5616 } 5617 5618 return 0; 5619 } 5620 5621 static int light_write(char *buf) 5622 { 5623 char *cmd; 5624 int newstatus = 0; 5625 5626 if (!tp_features.light) 5627 return -ENODEV; 5628 5629 while ((cmd = strsep(&buf, ","))) { 5630 if (strlencmp(cmd, "on") == 0) { 5631 newstatus = 1; 5632 } else if (strlencmp(cmd, "off") == 0) { 5633 newstatus = 0; 5634 } else 5635 return -EINVAL; 5636 } 5637 5638 return light_set_status(newstatus); 5639 } 5640 5641 static struct ibm_struct light_driver_data = { 5642 .name = "light", 5643 .read = light_read, 5644 .write = light_write, 5645 .exit = light_exit, 5646 }; 5647 5648 /************************************************************************* 5649 * CMOS subdriver 5650 */ 5651 5652 /* sysfs cmos_command -------------------------------------------------- */ 5653 static ssize_t cmos_command_store(struct device *dev, 5654 struct device_attribute *attr, 5655 const char *buf, size_t count) 5656 { 5657 unsigned long cmos_cmd; 5658 int res; 5659 5660 if (parse_strtoul(buf, 21, &cmos_cmd)) 5661 return -EINVAL; 5662 5663 res = issue_thinkpad_cmos_command(cmos_cmd); 5664 return (res) ? res : count; 5665 } 5666 5667 static DEVICE_ATTR_WO(cmos_command); 5668 5669 /* --------------------------------------------------------------------- */ 5670 5671 static int __init cmos_init(struct ibm_init_struct *iibm) 5672 { 5673 int res; 5674 5675 vdbg_printk(TPACPI_DBG_INIT, 5676 "initializing cmos commands subdriver\n"); 5677 5678 TPACPI_ACPIHANDLE_INIT(cmos); 5679 5680 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5681 str_supported(cmos_handle != NULL)); 5682 5683 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5684 if (res) 5685 return res; 5686 5687 return (cmos_handle) ? 0 : 1; 5688 } 5689 5690 static void cmos_exit(void) 5691 { 5692 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5693 } 5694 5695 static int cmos_read(struct seq_file *m) 5696 { 5697 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5698 R30, R31, T20-22, X20-21 */ 5699 if (!cmos_handle) 5700 seq_printf(m, "status:\t\tnot supported\n"); 5701 else { 5702 seq_printf(m, "status:\t\tsupported\n"); 5703 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5704 } 5705 5706 return 0; 5707 } 5708 5709 static int cmos_write(char *buf) 5710 { 5711 char *cmd; 5712 int cmos_cmd, res; 5713 5714 while ((cmd = strsep(&buf, ","))) { 5715 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5716 cmos_cmd >= 0 && cmos_cmd <= 21) { 5717 /* cmos_cmd set */ 5718 } else 5719 return -EINVAL; 5720 5721 res = issue_thinkpad_cmos_command(cmos_cmd); 5722 if (res) 5723 return res; 5724 } 5725 5726 return 0; 5727 } 5728 5729 static struct ibm_struct cmos_driver_data = { 5730 .name = "cmos", 5731 .read = cmos_read, 5732 .write = cmos_write, 5733 .exit = cmos_exit, 5734 }; 5735 5736 /************************************************************************* 5737 * LED subdriver 5738 */ 5739 5740 enum led_access_mode { 5741 TPACPI_LED_NONE = 0, 5742 TPACPI_LED_570, /* 570 */ 5743 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5744 TPACPI_LED_NEW, /* all others */ 5745 }; 5746 5747 enum { /* For TPACPI_LED_OLD */ 5748 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5749 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5750 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5751 }; 5752 5753 static enum led_access_mode led_supported; 5754 5755 static acpi_handle led_handle; 5756 5757 #define TPACPI_LED_NUMLEDS 16 5758 static struct tpacpi_led_classdev *tpacpi_leds; 5759 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5760 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5761 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5762 "tpacpi::power", 5763 "tpacpi:orange:batt", 5764 "tpacpi:green:batt", 5765 "tpacpi::dock_active", 5766 "tpacpi::bay_active", 5767 "tpacpi::dock_batt", 5768 "tpacpi::unknown_led", 5769 "tpacpi::standby", 5770 "tpacpi::dock_status1", 5771 "tpacpi::dock_status2", 5772 "tpacpi::unknown_led2", 5773 "tpacpi::unknown_led3", 5774 "tpacpi::thinkvantage", 5775 }; 5776 #define TPACPI_SAFE_LEDS 0x1081U 5777 5778 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5779 { 5780 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5781 return false; 5782 #else 5783 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5784 #endif 5785 } 5786 5787 static int led_get_status(const unsigned int led) 5788 { 5789 int status; 5790 enum led_status_t led_s; 5791 5792 switch (led_supported) { 5793 case TPACPI_LED_570: 5794 if (!acpi_evalf(ec_handle, 5795 &status, "GLED", "dd", 1 << led)) 5796 return -EIO; 5797 led_s = (status == 0) ? 5798 TPACPI_LED_OFF : 5799 ((status == 1) ? 5800 TPACPI_LED_ON : 5801 TPACPI_LED_BLINK); 5802 tpacpi_led_state_cache[led] = led_s; 5803 return led_s; 5804 default: 5805 return -ENXIO; 5806 } 5807 5808 /* not reached */ 5809 } 5810 5811 static int led_set_status(const unsigned int led, 5812 const enum led_status_t ledstatus) 5813 { 5814 /* off, on, blink. Index is led_status_t */ 5815 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5816 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5817 5818 int rc = 0; 5819 5820 switch (led_supported) { 5821 case TPACPI_LED_570: 5822 /* 570 */ 5823 if (unlikely(led > 7)) 5824 return -EINVAL; 5825 if (unlikely(tpacpi_is_led_restricted(led))) 5826 return -EPERM; 5827 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5828 (1 << led), led_sled_arg1[ledstatus])) 5829 return -EIO; 5830 break; 5831 case TPACPI_LED_OLD: 5832 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5833 if (unlikely(led > 7)) 5834 return -EINVAL; 5835 if (unlikely(tpacpi_is_led_restricted(led))) 5836 return -EPERM; 5837 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5838 if (rc >= 0) 5839 rc = ec_write(TPACPI_LED_EC_HLBL, 5840 (ledstatus == TPACPI_LED_BLINK) << led); 5841 if (rc >= 0) 5842 rc = ec_write(TPACPI_LED_EC_HLCL, 5843 (ledstatus != TPACPI_LED_OFF) << led); 5844 break; 5845 case TPACPI_LED_NEW: 5846 /* all others */ 5847 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5848 return -EINVAL; 5849 if (unlikely(tpacpi_is_led_restricted(led))) 5850 return -EPERM; 5851 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5852 led, led_led_arg1[ledstatus])) 5853 return -EIO; 5854 break; 5855 default: 5856 return -ENXIO; 5857 } 5858 5859 if (!rc) 5860 tpacpi_led_state_cache[led] = ledstatus; 5861 5862 return rc; 5863 } 5864 5865 static int led_sysfs_set(struct led_classdev *led_cdev, 5866 enum led_brightness brightness) 5867 { 5868 struct tpacpi_led_classdev *data = container_of(led_cdev, 5869 struct tpacpi_led_classdev, led_classdev); 5870 enum led_status_t new_state; 5871 5872 if (brightness == LED_OFF) 5873 new_state = TPACPI_LED_OFF; 5874 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5875 new_state = TPACPI_LED_ON; 5876 else 5877 new_state = TPACPI_LED_BLINK; 5878 5879 return led_set_status(data->led, new_state); 5880 } 5881 5882 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5883 unsigned long *delay_on, unsigned long *delay_off) 5884 { 5885 struct tpacpi_led_classdev *data = container_of(led_cdev, 5886 struct tpacpi_led_classdev, led_classdev); 5887 5888 /* Can we choose the flash rate? */ 5889 if (*delay_on == 0 && *delay_off == 0) { 5890 /* yes. set them to the hardware blink rate (1 Hz) */ 5891 *delay_on = 500; /* ms */ 5892 *delay_off = 500; /* ms */ 5893 } else if ((*delay_on != 500) || (*delay_off != 500)) 5894 return -EINVAL; 5895 5896 return led_set_status(data->led, TPACPI_LED_BLINK); 5897 } 5898 5899 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5900 { 5901 int rc; 5902 5903 struct tpacpi_led_classdev *data = container_of(led_cdev, 5904 struct tpacpi_led_classdev, led_classdev); 5905 5906 rc = led_get_status(data->led); 5907 5908 if (rc == TPACPI_LED_OFF || rc < 0) 5909 rc = LED_OFF; /* no error handling in led class :( */ 5910 else 5911 rc = LED_FULL; 5912 5913 return rc; 5914 } 5915 5916 static void led_exit(void) 5917 { 5918 unsigned int i; 5919 5920 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) 5921 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5922 5923 kfree(tpacpi_leds); 5924 } 5925 5926 static int __init tpacpi_init_led(unsigned int led) 5927 { 5928 /* LEDs with no name don't get registered */ 5929 if (!tpacpi_led_names[led]) 5930 return 0; 5931 5932 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set; 5933 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5934 if (led_supported == TPACPI_LED_570) 5935 tpacpi_leds[led].led_classdev.brightness_get = &led_sysfs_get; 5936 5937 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5938 tpacpi_leds[led].led = led; 5939 5940 return led_classdev_register(&tpacpi_pdev->dev, &tpacpi_leds[led].led_classdev); 5941 } 5942 5943 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5944 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5945 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5946 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5947 5948 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5949 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5950 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5951 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5952 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5953 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5954 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5955 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5956 5957 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5958 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5959 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5960 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5961 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5962 5963 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5964 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5965 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5966 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5967 5968 /* (1) - may have excess leds enabled on MSB */ 5969 5970 /* Defaults (order matters, keep last, don't reorder!) */ 5971 { /* Lenovo */ 5972 .vendor = PCI_VENDOR_ID_LENOVO, 5973 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5974 .quirks = 0x1fffU, 5975 }, 5976 { /* IBM ThinkPads with no EC version string */ 5977 .vendor = PCI_VENDOR_ID_IBM, 5978 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5979 .quirks = 0x00ffU, 5980 }, 5981 { /* IBM ThinkPads with EC version string */ 5982 .vendor = PCI_VENDOR_ID_IBM, 5983 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5984 .quirks = 0x00bfU, 5985 }, 5986 }; 5987 5988 static enum led_access_mode __init led_init_detect_mode(void) 5989 { 5990 acpi_status status; 5991 5992 if (tpacpi_is_ibm()) { 5993 /* 570 */ 5994 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5995 if (ACPI_SUCCESS(status)) 5996 return TPACPI_LED_570; 5997 5998 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5999 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 6000 if (ACPI_SUCCESS(status)) 6001 return TPACPI_LED_OLD; 6002 } 6003 6004 /* most others */ 6005 status = acpi_get_handle(ec_handle, "LED", &led_handle); 6006 if (ACPI_SUCCESS(status)) 6007 return TPACPI_LED_NEW; 6008 6009 /* R30, R31, and unknown firmwares */ 6010 led_handle = NULL; 6011 return TPACPI_LED_NONE; 6012 } 6013 6014 static int __init led_init(struct ibm_init_struct *iibm) 6015 { 6016 unsigned int i; 6017 int rc; 6018 unsigned long useful_leds; 6019 6020 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 6021 6022 led_supported = led_init_detect_mode(); 6023 6024 if (led_supported != TPACPI_LED_NONE) { 6025 useful_leds = tpacpi_check_quirks(led_useful_qtable, 6026 ARRAY_SIZE(led_useful_qtable)); 6027 6028 if (!useful_leds) { 6029 led_handle = NULL; 6030 led_supported = TPACPI_LED_NONE; 6031 } 6032 } 6033 6034 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 6035 str_supported(led_supported), led_supported); 6036 6037 if (led_supported == TPACPI_LED_NONE) 6038 return 1; 6039 6040 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds), 6041 GFP_KERNEL); 6042 if (!tpacpi_leds) { 6043 pr_err("Out of memory for LED data\n"); 6044 return -ENOMEM; 6045 } 6046 6047 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 6048 tpacpi_leds[i].led = -1; 6049 6050 if (!tpacpi_is_led_restricted(i) && test_bit(i, &useful_leds)) { 6051 rc = tpacpi_init_led(i); 6052 if (rc < 0) { 6053 led_exit(); 6054 return rc; 6055 } 6056 } 6057 } 6058 6059 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 6060 pr_notice("warning: userspace override of important firmware LEDs is enabled\n"); 6061 #endif 6062 return 0; 6063 } 6064 6065 #define str_led_status(s) \ 6066 ((s) == TPACPI_LED_OFF ? "off" : \ 6067 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 6068 6069 static int led_read(struct seq_file *m) 6070 { 6071 if (!led_supported) { 6072 seq_printf(m, "status:\t\tnot supported\n"); 6073 return 0; 6074 } 6075 seq_printf(m, "status:\t\tsupported\n"); 6076 6077 if (led_supported == TPACPI_LED_570) { 6078 /* 570 */ 6079 int i, status; 6080 for (i = 0; i < 8; i++) { 6081 status = led_get_status(i); 6082 if (status < 0) 6083 return -EIO; 6084 seq_printf(m, "%d:\t\t%s\n", 6085 i, str_led_status(status)); 6086 } 6087 } 6088 6089 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 6090 6091 return 0; 6092 } 6093 6094 static int led_write(char *buf) 6095 { 6096 char *cmd; 6097 int led, rc; 6098 enum led_status_t s; 6099 6100 if (!led_supported) 6101 return -ENODEV; 6102 6103 while ((cmd = strsep(&buf, ","))) { 6104 if (sscanf(cmd, "%d", &led) != 1) 6105 return -EINVAL; 6106 6107 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1)) 6108 return -ENODEV; 6109 6110 if (tpacpi_leds[led].led < 0) 6111 return -ENODEV; 6112 6113 if (strstr(cmd, "off")) { 6114 s = TPACPI_LED_OFF; 6115 } else if (strstr(cmd, "on")) { 6116 s = TPACPI_LED_ON; 6117 } else if (strstr(cmd, "blink")) { 6118 s = TPACPI_LED_BLINK; 6119 } else { 6120 return -EINVAL; 6121 } 6122 6123 rc = led_set_status(led, s); 6124 if (rc < 0) 6125 return rc; 6126 } 6127 6128 return 0; 6129 } 6130 6131 static struct ibm_struct led_driver_data = { 6132 .name = "led", 6133 .read = led_read, 6134 .write = led_write, 6135 .exit = led_exit, 6136 }; 6137 6138 /************************************************************************* 6139 * Beep subdriver 6140 */ 6141 6142 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 6143 6144 #define TPACPI_BEEP_Q1 0x0001 6145 6146 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 6147 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 6148 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 6149 }; 6150 6151 static int __init beep_init(struct ibm_init_struct *iibm) 6152 { 6153 unsigned long quirks; 6154 6155 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 6156 6157 TPACPI_ACPIHANDLE_INIT(beep); 6158 6159 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 6160 str_supported(beep_handle != NULL)); 6161 6162 quirks = tpacpi_check_quirks(beep_quirk_table, 6163 ARRAY_SIZE(beep_quirk_table)); 6164 6165 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6166 6167 return (beep_handle) ? 0 : 1; 6168 } 6169 6170 static int beep_read(struct seq_file *m) 6171 { 6172 if (!beep_handle) 6173 seq_printf(m, "status:\t\tnot supported\n"); 6174 else { 6175 seq_printf(m, "status:\t\tsupported\n"); 6176 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6177 } 6178 6179 return 0; 6180 } 6181 6182 static int beep_write(char *buf) 6183 { 6184 char *cmd; 6185 int beep_cmd; 6186 6187 if (!beep_handle) 6188 return -ENODEV; 6189 6190 while ((cmd = strsep(&buf, ","))) { 6191 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6192 beep_cmd >= 0 && beep_cmd <= 17) { 6193 /* beep_cmd set */ 6194 } else 6195 return -EINVAL; 6196 if (tp_features.beep_needs_two_args) { 6197 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6198 beep_cmd, 0)) 6199 return -EIO; 6200 } else { 6201 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6202 beep_cmd)) 6203 return -EIO; 6204 } 6205 } 6206 6207 return 0; 6208 } 6209 6210 static struct ibm_struct beep_driver_data = { 6211 .name = "beep", 6212 .read = beep_read, 6213 .write = beep_write, 6214 }; 6215 6216 /************************************************************************* 6217 * Thermal subdriver 6218 */ 6219 6220 enum thermal_access_mode { 6221 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6222 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6223 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6224 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6225 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6226 }; 6227 6228 enum { /* TPACPI_THERMAL_TPEC_* */ 6229 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6230 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6231 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6232 6233 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6234 }; 6235 6236 6237 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6238 struct ibm_thermal_sensors_struct { 6239 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6240 }; 6241 6242 static enum thermal_access_mode thermal_read_mode; 6243 6244 /* idx is zero-based */ 6245 static int thermal_get_sensor(int idx, s32 *value) 6246 { 6247 int t; 6248 s8 tmp; 6249 char tmpi[5]; 6250 6251 t = TP_EC_THERMAL_TMP0; 6252 6253 switch (thermal_read_mode) { 6254 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6255 case TPACPI_THERMAL_TPEC_16: 6256 if (idx >= 8 && idx <= 15) { 6257 t = TP_EC_THERMAL_TMP8; 6258 idx -= 8; 6259 } 6260 #endif 6261 /* fallthrough */ 6262 case TPACPI_THERMAL_TPEC_8: 6263 if (idx <= 7) { 6264 if (!acpi_ec_read(t + idx, &tmp)) 6265 return -EIO; 6266 *value = tmp * 1000; 6267 return 0; 6268 } 6269 break; 6270 6271 case TPACPI_THERMAL_ACPI_UPDT: 6272 if (idx <= 7) { 6273 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6274 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6275 return -EIO; 6276 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6277 return -EIO; 6278 *value = (t - 2732) * 100; 6279 return 0; 6280 } 6281 break; 6282 6283 case TPACPI_THERMAL_ACPI_TMP07: 6284 if (idx <= 7) { 6285 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6286 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6287 return -EIO; 6288 if (t > 127 || t < -127) 6289 t = TP_EC_THERMAL_TMP_NA; 6290 *value = t * 1000; 6291 return 0; 6292 } 6293 break; 6294 6295 case TPACPI_THERMAL_NONE: 6296 default: 6297 return -ENOSYS; 6298 } 6299 6300 return -EINVAL; 6301 } 6302 6303 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6304 { 6305 int res, i; 6306 int n; 6307 6308 n = 8; 6309 i = 0; 6310 6311 if (!s) 6312 return -EINVAL; 6313 6314 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6315 n = 16; 6316 6317 for (i = 0 ; i < n; i++) { 6318 res = thermal_get_sensor(i, &s->temp[i]); 6319 if (res) 6320 return res; 6321 } 6322 6323 return n; 6324 } 6325 6326 static void thermal_dump_all_sensors(void) 6327 { 6328 int n, i; 6329 struct ibm_thermal_sensors_struct t; 6330 6331 n = thermal_get_sensors(&t); 6332 if (n <= 0) 6333 return; 6334 6335 pr_notice("temperatures (Celsius):"); 6336 6337 for (i = 0; i < n; i++) { 6338 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6339 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6340 else 6341 pr_cont(" N/A"); 6342 } 6343 6344 pr_cont("\n"); 6345 } 6346 6347 /* sysfs temp##_input -------------------------------------------------- */ 6348 6349 static ssize_t thermal_temp_input_show(struct device *dev, 6350 struct device_attribute *attr, 6351 char *buf) 6352 { 6353 struct sensor_device_attribute *sensor_attr = 6354 to_sensor_dev_attr(attr); 6355 int idx = sensor_attr->index; 6356 s32 value; 6357 int res; 6358 6359 res = thermal_get_sensor(idx, &value); 6360 if (res) 6361 return res; 6362 if (value == TPACPI_THERMAL_SENSOR_NA) 6363 return -ENXIO; 6364 6365 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6366 } 6367 6368 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6369 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6370 thermal_temp_input_show, NULL, _idxB) 6371 6372 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6373 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6374 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6375 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6376 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6377 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6378 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6379 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6380 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6381 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6382 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6383 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6384 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6385 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6386 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6387 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6388 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6389 }; 6390 6391 #define THERMAL_ATTRS(X) \ 6392 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6393 6394 static struct attribute *thermal_temp_input_attr[] = { 6395 THERMAL_ATTRS(8), 6396 THERMAL_ATTRS(9), 6397 THERMAL_ATTRS(10), 6398 THERMAL_ATTRS(11), 6399 THERMAL_ATTRS(12), 6400 THERMAL_ATTRS(13), 6401 THERMAL_ATTRS(14), 6402 THERMAL_ATTRS(15), 6403 THERMAL_ATTRS(0), 6404 THERMAL_ATTRS(1), 6405 THERMAL_ATTRS(2), 6406 THERMAL_ATTRS(3), 6407 THERMAL_ATTRS(4), 6408 THERMAL_ATTRS(5), 6409 THERMAL_ATTRS(6), 6410 THERMAL_ATTRS(7), 6411 NULL 6412 }; 6413 6414 static const struct attribute_group thermal_temp_input16_group = { 6415 .attrs = thermal_temp_input_attr 6416 }; 6417 6418 static const struct attribute_group thermal_temp_input8_group = { 6419 .attrs = &thermal_temp_input_attr[8] 6420 }; 6421 6422 #undef THERMAL_SENSOR_ATTR_TEMP 6423 #undef THERMAL_ATTRS 6424 6425 /* --------------------------------------------------------------------- */ 6426 6427 static int __init thermal_init(struct ibm_init_struct *iibm) 6428 { 6429 u8 t, ta1, ta2; 6430 int i; 6431 int acpi_tmp7; 6432 int res; 6433 6434 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6435 6436 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6437 6438 if (thinkpad_id.ec_model) { 6439 /* 6440 * Direct EC access mode: sensors at registers 6441 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6442 * non-implemented, thermal sensors return 0x80 when 6443 * not available 6444 */ 6445 6446 ta1 = ta2 = 0; 6447 for (i = 0; i < 8; i++) { 6448 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6449 ta1 |= t; 6450 } else { 6451 ta1 = 0; 6452 break; 6453 } 6454 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6455 ta2 |= t; 6456 } else { 6457 ta1 = 0; 6458 break; 6459 } 6460 } 6461 if (ta1 == 0) { 6462 /* This is sheer paranoia, but we handle it anyway */ 6463 if (acpi_tmp7) { 6464 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n"); 6465 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6466 } else { 6467 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n"); 6468 thermal_read_mode = TPACPI_THERMAL_NONE; 6469 } 6470 } else { 6471 thermal_read_mode = 6472 (ta2 != 0) ? 6473 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6474 } 6475 } else if (acpi_tmp7) { 6476 if (tpacpi_is_ibm() && 6477 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6478 /* 600e/x, 770e, 770x */ 6479 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6480 } else { 6481 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6482 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6483 } 6484 } else { 6485 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6486 thermal_read_mode = TPACPI_THERMAL_NONE; 6487 } 6488 6489 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6490 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6491 thermal_read_mode); 6492 6493 switch (thermal_read_mode) { 6494 case TPACPI_THERMAL_TPEC_16: 6495 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6496 &thermal_temp_input16_group); 6497 if (res) 6498 return res; 6499 break; 6500 case TPACPI_THERMAL_TPEC_8: 6501 case TPACPI_THERMAL_ACPI_TMP07: 6502 case TPACPI_THERMAL_ACPI_UPDT: 6503 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6504 &thermal_temp_input8_group); 6505 if (res) 6506 return res; 6507 break; 6508 case TPACPI_THERMAL_NONE: 6509 default: 6510 return 1; 6511 } 6512 6513 return 0; 6514 } 6515 6516 static void thermal_exit(void) 6517 { 6518 switch (thermal_read_mode) { 6519 case TPACPI_THERMAL_TPEC_16: 6520 sysfs_remove_group(&tpacpi_hwmon->kobj, 6521 &thermal_temp_input16_group); 6522 break; 6523 case TPACPI_THERMAL_TPEC_8: 6524 case TPACPI_THERMAL_ACPI_TMP07: 6525 case TPACPI_THERMAL_ACPI_UPDT: 6526 sysfs_remove_group(&tpacpi_hwmon->kobj, 6527 &thermal_temp_input8_group); 6528 break; 6529 case TPACPI_THERMAL_NONE: 6530 default: 6531 break; 6532 } 6533 } 6534 6535 static int thermal_read(struct seq_file *m) 6536 { 6537 int n, i; 6538 struct ibm_thermal_sensors_struct t; 6539 6540 n = thermal_get_sensors(&t); 6541 if (unlikely(n < 0)) 6542 return n; 6543 6544 seq_printf(m, "temperatures:\t"); 6545 6546 if (n > 0) { 6547 for (i = 0; i < (n - 1); i++) 6548 seq_printf(m, "%d ", t.temp[i] / 1000); 6549 seq_printf(m, "%d\n", t.temp[i] / 1000); 6550 } else 6551 seq_printf(m, "not supported\n"); 6552 6553 return 0; 6554 } 6555 6556 static struct ibm_struct thermal_driver_data = { 6557 .name = "thermal", 6558 .read = thermal_read, 6559 .exit = thermal_exit, 6560 }; 6561 6562 /************************************************************************* 6563 * Backlight/brightness subdriver 6564 */ 6565 6566 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6567 6568 /* 6569 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6570 * CMOS NVRAM byte 0x5E, bits 0-3. 6571 * 6572 * EC HBRV (0x31) has the following layout 6573 * Bit 7: unknown function 6574 * Bit 6: unknown function 6575 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6576 * Bit 4: must be set to zero to avoid problems 6577 * Bit 3-0: backlight brightness level 6578 * 6579 * brightness_get_raw returns status data in the HBRV layout 6580 * 6581 * WARNING: The X61 has been verified to use HBRV for something else, so 6582 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6583 * testing on the very early *60 Lenovo models... 6584 */ 6585 6586 enum { 6587 TP_EC_BACKLIGHT = 0x31, 6588 6589 /* TP_EC_BACKLIGHT bitmasks */ 6590 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6591 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6592 TP_EC_BACKLIGHT_MAPSW = 0x20, 6593 }; 6594 6595 enum tpacpi_brightness_access_mode { 6596 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6597 TPACPI_BRGHT_MODE_EC, /* EC control */ 6598 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6599 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6600 TPACPI_BRGHT_MODE_MAX 6601 }; 6602 6603 static struct backlight_device *ibm_backlight_device; 6604 6605 static enum tpacpi_brightness_access_mode brightness_mode = 6606 TPACPI_BRGHT_MODE_MAX; 6607 6608 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6609 6610 static struct mutex brightness_mutex; 6611 6612 /* NVRAM brightness access, 6613 * call with brightness_mutex held! */ 6614 static unsigned int tpacpi_brightness_nvram_get(void) 6615 { 6616 u8 lnvram; 6617 6618 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6619 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6620 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6621 lnvram &= bright_maxlvl; 6622 6623 return lnvram; 6624 } 6625 6626 static void tpacpi_brightness_checkpoint_nvram(void) 6627 { 6628 u8 lec = 0; 6629 u8 b_nvram; 6630 6631 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6632 return; 6633 6634 vdbg_printk(TPACPI_DBG_BRGHT, 6635 "trying to checkpoint backlight level to NVRAM...\n"); 6636 6637 if (mutex_lock_killable(&brightness_mutex) < 0) 6638 return; 6639 6640 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6641 goto unlock; 6642 lec &= TP_EC_BACKLIGHT_LVLMSK; 6643 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6644 6645 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6646 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6647 /* NVRAM needs update */ 6648 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6649 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6650 b_nvram |= lec; 6651 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6652 dbg_printk(TPACPI_DBG_BRGHT, 6653 "updated NVRAM backlight level to %u (0x%02x)\n", 6654 (unsigned int) lec, (unsigned int) b_nvram); 6655 } else 6656 vdbg_printk(TPACPI_DBG_BRGHT, 6657 "NVRAM backlight level already is %u (0x%02x)\n", 6658 (unsigned int) lec, (unsigned int) b_nvram); 6659 6660 unlock: 6661 mutex_unlock(&brightness_mutex); 6662 } 6663 6664 6665 /* call with brightness_mutex held! */ 6666 static int tpacpi_brightness_get_raw(int *status) 6667 { 6668 u8 lec = 0; 6669 6670 switch (brightness_mode) { 6671 case TPACPI_BRGHT_MODE_UCMS_STEP: 6672 *status = tpacpi_brightness_nvram_get(); 6673 return 0; 6674 case TPACPI_BRGHT_MODE_EC: 6675 case TPACPI_BRGHT_MODE_ECNVRAM: 6676 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6677 return -EIO; 6678 *status = lec; 6679 return 0; 6680 default: 6681 return -ENXIO; 6682 } 6683 } 6684 6685 /* call with brightness_mutex held! */ 6686 /* do NOT call with illegal backlight level value */ 6687 static int tpacpi_brightness_set_ec(unsigned int value) 6688 { 6689 u8 lec = 0; 6690 6691 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6692 return -EIO; 6693 6694 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6695 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6696 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6697 return -EIO; 6698 6699 return 0; 6700 } 6701 6702 /* call with brightness_mutex held! */ 6703 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6704 { 6705 int cmos_cmd, inc; 6706 unsigned int current_value, i; 6707 6708 current_value = tpacpi_brightness_nvram_get(); 6709 6710 if (value == current_value) 6711 return 0; 6712 6713 cmos_cmd = (value > current_value) ? 6714 TP_CMOS_BRIGHTNESS_UP : 6715 TP_CMOS_BRIGHTNESS_DOWN; 6716 inc = (value > current_value) ? 1 : -1; 6717 6718 for (i = current_value; i != value; i += inc) 6719 if (issue_thinkpad_cmos_command(cmos_cmd)) 6720 return -EIO; 6721 6722 return 0; 6723 } 6724 6725 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6726 static int brightness_set(unsigned int value) 6727 { 6728 int res; 6729 6730 if (value > bright_maxlvl) 6731 return -EINVAL; 6732 6733 vdbg_printk(TPACPI_DBG_BRGHT, 6734 "set backlight level to %d\n", value); 6735 6736 res = mutex_lock_killable(&brightness_mutex); 6737 if (res < 0) 6738 return res; 6739 6740 switch (brightness_mode) { 6741 case TPACPI_BRGHT_MODE_EC: 6742 case TPACPI_BRGHT_MODE_ECNVRAM: 6743 res = tpacpi_brightness_set_ec(value); 6744 break; 6745 case TPACPI_BRGHT_MODE_UCMS_STEP: 6746 res = tpacpi_brightness_set_ucmsstep(value); 6747 break; 6748 default: 6749 res = -ENXIO; 6750 } 6751 6752 mutex_unlock(&brightness_mutex); 6753 return res; 6754 } 6755 6756 /* sysfs backlight class ----------------------------------------------- */ 6757 6758 static int brightness_update_status(struct backlight_device *bd) 6759 { 6760 unsigned int level = 6761 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6762 bd->props.power == FB_BLANK_UNBLANK) ? 6763 bd->props.brightness : 0; 6764 6765 dbg_printk(TPACPI_DBG_BRGHT, 6766 "backlight: attempt to set level to %d\n", 6767 level); 6768 6769 /* it is the backlight class's job (caller) to handle 6770 * EINTR and other errors properly */ 6771 return brightness_set(level); 6772 } 6773 6774 static int brightness_get(struct backlight_device *bd) 6775 { 6776 int status, res; 6777 6778 res = mutex_lock_killable(&brightness_mutex); 6779 if (res < 0) 6780 return 0; 6781 6782 res = tpacpi_brightness_get_raw(&status); 6783 6784 mutex_unlock(&brightness_mutex); 6785 6786 if (res < 0) 6787 return 0; 6788 6789 return status & TP_EC_BACKLIGHT_LVLMSK; 6790 } 6791 6792 static void tpacpi_brightness_notify_change(void) 6793 { 6794 backlight_force_update(ibm_backlight_device, 6795 BACKLIGHT_UPDATE_HOTKEY); 6796 } 6797 6798 static const struct backlight_ops ibm_backlight_data = { 6799 .get_brightness = brightness_get, 6800 .update_status = brightness_update_status, 6801 }; 6802 6803 /* --------------------------------------------------------------------- */ 6804 6805 /* 6806 * Call _BCL method of video device. On some ThinkPads this will 6807 * switch the firmware to the ACPI brightness control mode. 6808 */ 6809 6810 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6811 { 6812 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6813 union acpi_object *obj; 6814 struct acpi_device *device, *child; 6815 int rc; 6816 6817 if (acpi_bus_get_device(handle, &device)) 6818 return 0; 6819 6820 rc = 0; 6821 list_for_each_entry(child, &device->children, node) { 6822 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6823 NULL, &buffer); 6824 if (ACPI_FAILURE(status)) 6825 continue; 6826 6827 obj = (union acpi_object *)buffer.pointer; 6828 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6829 pr_err("Unknown _BCL data, please report this to %s\n", 6830 TPACPI_MAIL); 6831 rc = 0; 6832 } else { 6833 rc = obj->package.count; 6834 } 6835 break; 6836 } 6837 6838 kfree(buffer.pointer); 6839 return rc; 6840 } 6841 6842 6843 /* 6844 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6845 */ 6846 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6847 { 6848 acpi_handle video_device; 6849 int bcl_levels = 0; 6850 6851 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6852 if (video_device) 6853 bcl_levels = tpacpi_query_bcl_levels(video_device); 6854 6855 tp_features.bright_acpimode = (bcl_levels > 0); 6856 6857 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6858 } 6859 6860 /* 6861 * These are only useful for models that have only one possibility 6862 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6863 * these quirks. 6864 */ 6865 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6866 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6867 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6868 6869 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6870 /* Models with ATI GPUs known to require ECNVRAM mode */ 6871 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6872 6873 /* Models with ATI GPUs that can use ECNVRAM */ 6874 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6875 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6876 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6877 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6878 6879 /* Models with Intel Extreme Graphics 2 */ 6880 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6881 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6882 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6883 6884 /* Models with Intel GMA900 */ 6885 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6886 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6887 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6888 }; 6889 6890 /* 6891 * Returns < 0 for error, otherwise sets tp_features.bright_* 6892 * and bright_maxlvl. 6893 */ 6894 static void __init tpacpi_detect_brightness_capabilities(void) 6895 { 6896 unsigned int b; 6897 6898 vdbg_printk(TPACPI_DBG_INIT, 6899 "detecting firmware brightness interface capabilities\n"); 6900 6901 /* we could run a quirks check here (same table used by 6902 * brightness_init) if needed */ 6903 6904 /* 6905 * We always attempt to detect acpi support, so as to switch 6906 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6907 * going to publish a backlight interface 6908 */ 6909 b = tpacpi_check_std_acpi_brightness_support(); 6910 switch (b) { 6911 case 16: 6912 bright_maxlvl = 15; 6913 break; 6914 case 8: 6915 case 0: 6916 bright_maxlvl = 7; 6917 break; 6918 default: 6919 tp_features.bright_unkfw = 1; 6920 bright_maxlvl = b - 1; 6921 } 6922 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6923 } 6924 6925 static int __init brightness_init(struct ibm_init_struct *iibm) 6926 { 6927 struct backlight_properties props; 6928 int b; 6929 unsigned long quirks; 6930 6931 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6932 6933 mutex_init(&brightness_mutex); 6934 6935 quirks = tpacpi_check_quirks(brightness_quirk_table, 6936 ARRAY_SIZE(brightness_quirk_table)); 6937 6938 /* tpacpi_detect_brightness_capabilities() must have run already */ 6939 6940 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6941 if (tp_features.bright_unkfw) 6942 return 1; 6943 6944 if (!brightness_enable) { 6945 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6946 "brightness support disabled by module parameter\n"); 6947 return 1; 6948 } 6949 6950 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6951 if (brightness_enable > 1) { 6952 pr_info("Standard ACPI backlight interface available, not loading native one\n"); 6953 return 1; 6954 } else if (brightness_enable == 1) { 6955 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n"); 6956 return 1; 6957 } 6958 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6959 pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n"); 6960 } 6961 6962 /* 6963 * Check for module parameter bogosity, note that we 6964 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6965 * able to detect "unspecified" 6966 */ 6967 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6968 return -EINVAL; 6969 6970 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6971 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6972 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6973 if (quirks & TPACPI_BRGHT_Q_EC) 6974 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6975 else 6976 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6977 6978 dbg_printk(TPACPI_DBG_BRGHT, 6979 "driver auto-selected brightness_mode=%d\n", 6980 brightness_mode); 6981 } 6982 6983 /* Safety */ 6984 if (!tpacpi_is_ibm() && 6985 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6986 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6987 return -EINVAL; 6988 6989 if (tpacpi_brightness_get_raw(&b) < 0) 6990 return 1; 6991 6992 memset(&props, 0, sizeof(struct backlight_properties)); 6993 props.type = BACKLIGHT_PLATFORM; 6994 props.max_brightness = bright_maxlvl; 6995 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6996 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6997 NULL, NULL, 6998 &ibm_backlight_data, 6999 &props); 7000 if (IS_ERR(ibm_backlight_device)) { 7001 int rc = PTR_ERR(ibm_backlight_device); 7002 ibm_backlight_device = NULL; 7003 pr_err("Could not register backlight device\n"); 7004 return rc; 7005 } 7006 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7007 "brightness is supported\n"); 7008 7009 if (quirks & TPACPI_BRGHT_Q_ASK) { 7010 pr_notice("brightness: will use unverified default: brightness_mode=%d\n", 7011 brightness_mode); 7012 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n", 7013 TPACPI_MAIL); 7014 } 7015 7016 /* Added by mistake in early 2007. Probably useless, but it could 7017 * be working around some unknown firmware problem where the value 7018 * read at startup doesn't match the real hardware state... so leave 7019 * it in place just in case */ 7020 backlight_update_status(ibm_backlight_device); 7021 7022 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7023 "brightness: registering brightness hotkeys as change notification\n"); 7024 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7025 | TP_ACPI_HKEY_BRGHTUP_MASK 7026 | TP_ACPI_HKEY_BRGHTDWN_MASK); 7027 return 0; 7028 } 7029 7030 static void brightness_suspend(void) 7031 { 7032 tpacpi_brightness_checkpoint_nvram(); 7033 } 7034 7035 static void brightness_shutdown(void) 7036 { 7037 tpacpi_brightness_checkpoint_nvram(); 7038 } 7039 7040 static void brightness_exit(void) 7041 { 7042 if (ibm_backlight_device) { 7043 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 7044 "calling backlight_device_unregister()\n"); 7045 backlight_device_unregister(ibm_backlight_device); 7046 } 7047 7048 tpacpi_brightness_checkpoint_nvram(); 7049 } 7050 7051 static int brightness_read(struct seq_file *m) 7052 { 7053 int level; 7054 7055 level = brightness_get(NULL); 7056 if (level < 0) { 7057 seq_printf(m, "level:\t\tunreadable\n"); 7058 } else { 7059 seq_printf(m, "level:\t\t%d\n", level); 7060 seq_printf(m, "commands:\tup, down\n"); 7061 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7062 bright_maxlvl); 7063 } 7064 7065 return 0; 7066 } 7067 7068 static int brightness_write(char *buf) 7069 { 7070 int level; 7071 int rc; 7072 char *cmd; 7073 7074 level = brightness_get(NULL); 7075 if (level < 0) 7076 return level; 7077 7078 while ((cmd = strsep(&buf, ","))) { 7079 if (strlencmp(cmd, "up") == 0) { 7080 if (level < bright_maxlvl) 7081 level++; 7082 } else if (strlencmp(cmd, "down") == 0) { 7083 if (level > 0) 7084 level--; 7085 } else if (sscanf(cmd, "level %d", &level) == 1 && 7086 level >= 0 && level <= bright_maxlvl) { 7087 /* new level set */ 7088 } else 7089 return -EINVAL; 7090 } 7091 7092 tpacpi_disclose_usertask("procfs brightness", 7093 "set level to %d\n", level); 7094 7095 /* 7096 * Now we know what the final level should be, so we try to set it. 7097 * Doing it this way makes the syscall restartable in case of EINTR 7098 */ 7099 rc = brightness_set(level); 7100 if (!rc && ibm_backlight_device) 7101 backlight_force_update(ibm_backlight_device, 7102 BACKLIGHT_UPDATE_SYSFS); 7103 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7104 } 7105 7106 static struct ibm_struct brightness_driver_data = { 7107 .name = "brightness", 7108 .read = brightness_read, 7109 .write = brightness_write, 7110 .exit = brightness_exit, 7111 .suspend = brightness_suspend, 7112 .shutdown = brightness_shutdown, 7113 }; 7114 7115 /************************************************************************* 7116 * Volume subdriver 7117 */ 7118 7119 /* 7120 * IBM ThinkPads have a simple volume controller with MUTE gating. 7121 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 7122 * 7123 * Since the *61 series (and probably also the later *60 series), Lenovo 7124 * ThinkPads only implement the MUTE gate. 7125 * 7126 * EC register 0x30 7127 * Bit 6: MUTE (1 mutes sound) 7128 * Bit 3-0: Volume 7129 * Other bits should be zero as far as we know. 7130 * 7131 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 7132 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 7133 * such as bit 7 which is used to detect repeated presses of MUTE, 7134 * and we leave them unchanged. 7135 * 7136 * On newer Lenovo ThinkPads, the EC can automatically change the volume 7137 * in response to user input. Unfortunately, this rarely works well. 7138 * The laptop changes the state of its internal MUTE gate and, on some 7139 * models, sends KEY_MUTE, causing any user code that responds to the 7140 * mute button to get confused. The hardware MUTE gate is also 7141 * unnecessary, since user code can handle the mute button without 7142 * kernel or EC help. 7143 * 7144 * To avoid confusing userspace, we simply disable all EC-based mute 7145 * and volume controls when possible. 7146 */ 7147 7148 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 7149 7150 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 7151 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 7152 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7153 7154 #if SNDRV_CARDS <= 32 7155 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7156 #else 7157 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7158 #endif 7159 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7160 static char *alsa_id = "ThinkPadEC"; 7161 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7162 7163 struct tpacpi_alsa_data { 7164 struct snd_card *card; 7165 struct snd_ctl_elem_id *ctl_mute_id; 7166 struct snd_ctl_elem_id *ctl_vol_id; 7167 }; 7168 7169 static struct snd_card *alsa_card; 7170 7171 enum { 7172 TP_EC_AUDIO = 0x30, 7173 7174 /* TP_EC_AUDIO bits */ 7175 TP_EC_AUDIO_MUTESW = 6, 7176 7177 /* TP_EC_AUDIO bitmasks */ 7178 TP_EC_AUDIO_LVL_MSK = 0x0F, 7179 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7180 7181 /* Maximum volume */ 7182 TP_EC_VOLUME_MAX = 14, 7183 }; 7184 7185 enum tpacpi_volume_access_mode { 7186 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7187 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7188 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7189 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7190 TPACPI_VOL_MODE_MAX 7191 }; 7192 7193 enum tpacpi_volume_capabilities { 7194 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7195 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7196 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7197 TPACPI_VOL_CAP_MAX 7198 }; 7199 7200 enum tpacpi_mute_btn_mode { 7201 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7202 /* We don't know what mode 1 is. */ 7203 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7204 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7205 }; 7206 7207 static enum tpacpi_volume_access_mode volume_mode = 7208 TPACPI_VOL_MODE_MAX; 7209 7210 static enum tpacpi_volume_capabilities volume_capabilities; 7211 static bool volume_control_allowed; 7212 static bool software_mute_requested = true; 7213 static bool software_mute_active; 7214 static int software_mute_orig_mode; 7215 7216 /* 7217 * Used to syncronize writers to TP_EC_AUDIO and 7218 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7219 */ 7220 static struct mutex volume_mutex; 7221 7222 static void tpacpi_volume_checkpoint_nvram(void) 7223 { 7224 u8 lec = 0; 7225 u8 b_nvram; 7226 u8 ec_mask; 7227 7228 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7229 return; 7230 if (!volume_control_allowed) 7231 return; 7232 if (software_mute_active) 7233 return; 7234 7235 vdbg_printk(TPACPI_DBG_MIXER, 7236 "trying to checkpoint mixer state to NVRAM...\n"); 7237 7238 if (tp_features.mixer_no_level_control) 7239 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7240 else 7241 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7242 7243 if (mutex_lock_killable(&volume_mutex) < 0) 7244 return; 7245 7246 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7247 goto unlock; 7248 lec &= ec_mask; 7249 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7250 7251 if (lec != (b_nvram & ec_mask)) { 7252 /* NVRAM needs update */ 7253 b_nvram &= ~ec_mask; 7254 b_nvram |= lec; 7255 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7256 dbg_printk(TPACPI_DBG_MIXER, 7257 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7258 (unsigned int) lec, (unsigned int) b_nvram); 7259 } else { 7260 vdbg_printk(TPACPI_DBG_MIXER, 7261 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7262 (unsigned int) lec, (unsigned int) b_nvram); 7263 } 7264 7265 unlock: 7266 mutex_unlock(&volume_mutex); 7267 } 7268 7269 static int volume_get_status_ec(u8 *status) 7270 { 7271 u8 s; 7272 7273 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7274 return -EIO; 7275 7276 *status = s; 7277 7278 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7279 7280 return 0; 7281 } 7282 7283 static int volume_get_status(u8 *status) 7284 { 7285 return volume_get_status_ec(status); 7286 } 7287 7288 static int volume_set_status_ec(const u8 status) 7289 { 7290 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7291 return -EIO; 7292 7293 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7294 7295 /* 7296 * On X200s, and possibly on others, it can take a while for 7297 * reads to become correct. 7298 */ 7299 msleep(1); 7300 7301 return 0; 7302 } 7303 7304 static int volume_set_status(const u8 status) 7305 { 7306 return volume_set_status_ec(status); 7307 } 7308 7309 /* returns < 0 on error, 0 on no change, 1 on change */ 7310 static int __volume_set_mute_ec(const bool mute) 7311 { 7312 int rc; 7313 u8 s, n; 7314 7315 if (mutex_lock_killable(&volume_mutex) < 0) 7316 return -EINTR; 7317 7318 rc = volume_get_status_ec(&s); 7319 if (rc) 7320 goto unlock; 7321 7322 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7323 s & ~TP_EC_AUDIO_MUTESW_MSK; 7324 7325 if (n != s) { 7326 rc = volume_set_status_ec(n); 7327 if (!rc) 7328 rc = 1; 7329 } 7330 7331 unlock: 7332 mutex_unlock(&volume_mutex); 7333 return rc; 7334 } 7335 7336 static int volume_alsa_set_mute(const bool mute) 7337 { 7338 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7339 (mute) ? "" : "un"); 7340 return __volume_set_mute_ec(mute); 7341 } 7342 7343 static int volume_set_mute(const bool mute) 7344 { 7345 int rc; 7346 7347 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7348 (mute) ? "" : "un"); 7349 7350 rc = __volume_set_mute_ec(mute); 7351 return (rc < 0) ? rc : 0; 7352 } 7353 7354 /* returns < 0 on error, 0 on no change, 1 on change */ 7355 static int __volume_set_volume_ec(const u8 vol) 7356 { 7357 int rc; 7358 u8 s, n; 7359 7360 if (vol > TP_EC_VOLUME_MAX) 7361 return -EINVAL; 7362 7363 if (mutex_lock_killable(&volume_mutex) < 0) 7364 return -EINTR; 7365 7366 rc = volume_get_status_ec(&s); 7367 if (rc) 7368 goto unlock; 7369 7370 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7371 7372 if (n != s) { 7373 rc = volume_set_status_ec(n); 7374 if (!rc) 7375 rc = 1; 7376 } 7377 7378 unlock: 7379 mutex_unlock(&volume_mutex); 7380 return rc; 7381 } 7382 7383 static int volume_set_software_mute(bool startup) 7384 { 7385 int result; 7386 7387 if (!tpacpi_is_lenovo()) 7388 return -ENODEV; 7389 7390 if (startup) { 7391 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7392 "HAUM", "qd")) 7393 return -EIO; 7394 7395 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7396 "Initial HAUM setting was %d\n", 7397 software_mute_orig_mode); 7398 } 7399 7400 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7401 (int)TP_EC_MUTE_BTN_NONE)) 7402 return -EIO; 7403 7404 if (result != TP_EC_MUTE_BTN_NONE) 7405 pr_warn("Unexpected SAUM result %d\n", 7406 result); 7407 7408 /* 7409 * In software mute mode, the standard codec controls take 7410 * precendence, so we unmute the ThinkPad HW switch at 7411 * startup. Just on case there are SAUM-capable ThinkPads 7412 * with level controls, set max HW volume as well. 7413 */ 7414 if (tp_features.mixer_no_level_control) 7415 result = volume_set_mute(false); 7416 else 7417 result = volume_set_status(TP_EC_VOLUME_MAX); 7418 7419 if (result != 0) 7420 pr_warn("Failed to unmute the HW mute switch\n"); 7421 7422 return 0; 7423 } 7424 7425 static void volume_exit_software_mute(void) 7426 { 7427 int r; 7428 7429 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7430 || r != software_mute_orig_mode) 7431 pr_warn("Failed to restore mute mode\n"); 7432 } 7433 7434 static int volume_alsa_set_volume(const u8 vol) 7435 { 7436 dbg_printk(TPACPI_DBG_MIXER, 7437 "ALSA: trying to set volume level to %hu\n", vol); 7438 return __volume_set_volume_ec(vol); 7439 } 7440 7441 static void volume_alsa_notify_change(void) 7442 { 7443 struct tpacpi_alsa_data *d; 7444 7445 if (alsa_card && alsa_card->private_data) { 7446 d = alsa_card->private_data; 7447 if (d->ctl_mute_id) 7448 snd_ctl_notify(alsa_card, 7449 SNDRV_CTL_EVENT_MASK_VALUE, 7450 d->ctl_mute_id); 7451 if (d->ctl_vol_id) 7452 snd_ctl_notify(alsa_card, 7453 SNDRV_CTL_EVENT_MASK_VALUE, 7454 d->ctl_vol_id); 7455 } 7456 } 7457 7458 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7459 struct snd_ctl_elem_info *uinfo) 7460 { 7461 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7462 uinfo->count = 1; 7463 uinfo->value.integer.min = 0; 7464 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7465 return 0; 7466 } 7467 7468 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7469 struct snd_ctl_elem_value *ucontrol) 7470 { 7471 u8 s; 7472 int rc; 7473 7474 rc = volume_get_status(&s); 7475 if (rc < 0) 7476 return rc; 7477 7478 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7479 return 0; 7480 } 7481 7482 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7483 struct snd_ctl_elem_value *ucontrol) 7484 { 7485 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7486 ucontrol->value.integer.value[0]); 7487 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7488 } 7489 7490 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7491 7492 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7493 struct snd_ctl_elem_value *ucontrol) 7494 { 7495 u8 s; 7496 int rc; 7497 7498 rc = volume_get_status(&s); 7499 if (rc < 0) 7500 return rc; 7501 7502 ucontrol->value.integer.value[0] = 7503 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7504 return 0; 7505 } 7506 7507 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7508 struct snd_ctl_elem_value *ucontrol) 7509 { 7510 tpacpi_disclose_usertask("ALSA", "%smute\n", 7511 ucontrol->value.integer.value[0] ? 7512 "un" : ""); 7513 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7514 } 7515 7516 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7517 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7518 .name = "Console Playback Volume", 7519 .index = 0, 7520 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7521 .info = volume_alsa_vol_info, 7522 .get = volume_alsa_vol_get, 7523 }; 7524 7525 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7526 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7527 .name = "Console Playback Switch", 7528 .index = 0, 7529 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7530 .info = volume_alsa_mute_info, 7531 .get = volume_alsa_mute_get, 7532 }; 7533 7534 static void volume_suspend(void) 7535 { 7536 tpacpi_volume_checkpoint_nvram(); 7537 } 7538 7539 static void volume_resume(void) 7540 { 7541 if (software_mute_active) { 7542 if (volume_set_software_mute(false) < 0) 7543 pr_warn("Failed to restore software mute\n"); 7544 } else { 7545 volume_alsa_notify_change(); 7546 } 7547 } 7548 7549 static void volume_shutdown(void) 7550 { 7551 tpacpi_volume_checkpoint_nvram(); 7552 } 7553 7554 static void volume_exit(void) 7555 { 7556 if (alsa_card) { 7557 snd_card_free(alsa_card); 7558 alsa_card = NULL; 7559 } 7560 7561 tpacpi_volume_checkpoint_nvram(); 7562 7563 if (software_mute_active) 7564 volume_exit_software_mute(); 7565 } 7566 7567 static int __init volume_create_alsa_mixer(void) 7568 { 7569 struct snd_card *card; 7570 struct tpacpi_alsa_data *data; 7571 struct snd_kcontrol *ctl_vol; 7572 struct snd_kcontrol *ctl_mute; 7573 int rc; 7574 7575 rc = snd_card_new(&tpacpi_pdev->dev, 7576 alsa_index, alsa_id, THIS_MODULE, 7577 sizeof(struct tpacpi_alsa_data), &card); 7578 if (rc < 0 || !card) { 7579 pr_err("Failed to create ALSA card structures: %d\n", rc); 7580 return 1; 7581 } 7582 7583 BUG_ON(!card->private_data); 7584 data = card->private_data; 7585 data->card = card; 7586 7587 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7588 sizeof(card->driver)); 7589 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7590 sizeof(card->shortname)); 7591 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7592 (thinkpad_id.ec_version_str) ? 7593 thinkpad_id.ec_version_str : "(unknown)"); 7594 snprintf(card->longname, sizeof(card->longname), 7595 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7596 (thinkpad_id.ec_version_str) ? 7597 thinkpad_id.ec_version_str : "unknown"); 7598 7599 if (volume_control_allowed) { 7600 volume_alsa_control_vol.put = volume_alsa_vol_put; 7601 volume_alsa_control_vol.access = 7602 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7603 7604 volume_alsa_control_mute.put = volume_alsa_mute_put; 7605 volume_alsa_control_mute.access = 7606 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7607 } 7608 7609 if (!tp_features.mixer_no_level_control) { 7610 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7611 rc = snd_ctl_add(card, ctl_vol); 7612 if (rc < 0) { 7613 pr_err("Failed to create ALSA volume control: %d\n", 7614 rc); 7615 goto err_exit; 7616 } 7617 data->ctl_vol_id = &ctl_vol->id; 7618 } 7619 7620 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7621 rc = snd_ctl_add(card, ctl_mute); 7622 if (rc < 0) { 7623 pr_err("Failed to create ALSA mute control: %d\n", rc); 7624 goto err_exit; 7625 } 7626 data->ctl_mute_id = &ctl_mute->id; 7627 7628 rc = snd_card_register(card); 7629 if (rc < 0) { 7630 pr_err("Failed to register ALSA card: %d\n", rc); 7631 goto err_exit; 7632 } 7633 7634 alsa_card = card; 7635 return 0; 7636 7637 err_exit: 7638 snd_card_free(card); 7639 return 1; 7640 } 7641 7642 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7643 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7644 7645 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7646 /* Whitelist volume level on all IBM by default */ 7647 { .vendor = PCI_VENDOR_ID_IBM, 7648 .bios = TPACPI_MATCH_ANY, 7649 .ec = TPACPI_MATCH_ANY, 7650 .quirks = TPACPI_VOL_Q_LEVEL }, 7651 7652 /* Lenovo models with volume control (needs confirmation) */ 7653 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7654 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7655 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7656 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7657 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7658 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7659 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7660 7661 /* Whitelist mute-only on all Lenovo by default */ 7662 { .vendor = PCI_VENDOR_ID_LENOVO, 7663 .bios = TPACPI_MATCH_ANY, 7664 .ec = TPACPI_MATCH_ANY, 7665 .quirks = TPACPI_VOL_Q_MUTEONLY } 7666 }; 7667 7668 static int __init volume_init(struct ibm_init_struct *iibm) 7669 { 7670 unsigned long quirks; 7671 int rc; 7672 7673 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7674 7675 mutex_init(&volume_mutex); 7676 7677 /* 7678 * Check for module parameter bogosity, note that we 7679 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7680 * able to detect "unspecified" 7681 */ 7682 if (volume_mode > TPACPI_VOL_MODE_MAX) 7683 return -EINVAL; 7684 7685 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7686 pr_err("UCMS step volume mode not implemented, please contact %s\n", 7687 TPACPI_MAIL); 7688 return 1; 7689 } 7690 7691 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7692 return -EINVAL; 7693 7694 /* 7695 * The ALSA mixer is our primary interface. 7696 * When disabled, don't install the subdriver at all 7697 */ 7698 if (!alsa_enable) { 7699 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7700 "ALSA mixer disabled by parameter, not loading volume subdriver...\n"); 7701 return 1; 7702 } 7703 7704 quirks = tpacpi_check_quirks(volume_quirk_table, 7705 ARRAY_SIZE(volume_quirk_table)); 7706 7707 switch (volume_capabilities) { 7708 case TPACPI_VOL_CAP_AUTO: 7709 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7710 tp_features.mixer_no_level_control = 1; 7711 else if (quirks & TPACPI_VOL_Q_LEVEL) 7712 tp_features.mixer_no_level_control = 0; 7713 else 7714 return 1; /* no mixer */ 7715 break; 7716 case TPACPI_VOL_CAP_VOLMUTE: 7717 tp_features.mixer_no_level_control = 0; 7718 break; 7719 case TPACPI_VOL_CAP_MUTEONLY: 7720 tp_features.mixer_no_level_control = 1; 7721 break; 7722 default: 7723 return 1; 7724 } 7725 7726 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7727 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7728 "using user-supplied volume_capabilities=%d\n", 7729 volume_capabilities); 7730 7731 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7732 volume_mode == TPACPI_VOL_MODE_MAX) { 7733 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7734 7735 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7736 "driver auto-selected volume_mode=%d\n", 7737 volume_mode); 7738 } else { 7739 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7740 "using user-supplied volume_mode=%d\n", 7741 volume_mode); 7742 } 7743 7744 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7745 "mute is supported, volume control is %s\n", 7746 str_supported(!tp_features.mixer_no_level_control)); 7747 7748 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7749 software_mute_active = true; 7750 } else { 7751 rc = volume_create_alsa_mixer(); 7752 if (rc) { 7753 pr_err("Could not create the ALSA mixer interface\n"); 7754 return rc; 7755 } 7756 7757 pr_info("Console audio control enabled, mode: %s\n", 7758 (volume_control_allowed) ? 7759 "override (read/write)" : 7760 "monitor (read only)"); 7761 } 7762 7763 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7764 "registering volume hotkeys as change notification\n"); 7765 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7766 | TP_ACPI_HKEY_VOLUP_MASK 7767 | TP_ACPI_HKEY_VOLDWN_MASK 7768 | TP_ACPI_HKEY_MUTE_MASK); 7769 7770 return 0; 7771 } 7772 7773 static int volume_read(struct seq_file *m) 7774 { 7775 u8 status; 7776 7777 if (volume_get_status(&status) < 0) { 7778 seq_printf(m, "level:\t\tunreadable\n"); 7779 } else { 7780 if (tp_features.mixer_no_level_control) 7781 seq_printf(m, "level:\t\tunsupported\n"); 7782 else 7783 seq_printf(m, "level:\t\t%d\n", 7784 status & TP_EC_AUDIO_LVL_MSK); 7785 7786 seq_printf(m, "mute:\t\t%s\n", 7787 onoff(status, TP_EC_AUDIO_MUTESW)); 7788 7789 if (volume_control_allowed) { 7790 seq_printf(m, "commands:\tunmute, mute\n"); 7791 if (!tp_features.mixer_no_level_control) { 7792 seq_printf(m, "commands:\tup, down\n"); 7793 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7794 TP_EC_VOLUME_MAX); 7795 } 7796 } 7797 } 7798 7799 return 0; 7800 } 7801 7802 static int volume_write(char *buf) 7803 { 7804 u8 s; 7805 u8 new_level, new_mute; 7806 int l; 7807 char *cmd; 7808 int rc; 7809 7810 /* 7811 * We do allow volume control at driver startup, so that the 7812 * user can set initial state through the volume=... parameter hack. 7813 */ 7814 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7815 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7816 tp_warned.volume_ctrl_forbidden = 1; 7817 pr_notice("Console audio control in monitor mode, changes are not allowed\n"); 7818 pr_notice("Use the volume_control=1 module parameter to enable volume control\n"); 7819 } 7820 return -EPERM; 7821 } 7822 7823 rc = volume_get_status(&s); 7824 if (rc < 0) 7825 return rc; 7826 7827 new_level = s & TP_EC_AUDIO_LVL_MSK; 7828 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7829 7830 while ((cmd = strsep(&buf, ","))) { 7831 if (!tp_features.mixer_no_level_control) { 7832 if (strlencmp(cmd, "up") == 0) { 7833 if (new_mute) 7834 new_mute = 0; 7835 else if (new_level < TP_EC_VOLUME_MAX) 7836 new_level++; 7837 continue; 7838 } else if (strlencmp(cmd, "down") == 0) { 7839 if (new_mute) 7840 new_mute = 0; 7841 else if (new_level > 0) 7842 new_level--; 7843 continue; 7844 } else if (sscanf(cmd, "level %u", &l) == 1 && 7845 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7846 new_level = l; 7847 continue; 7848 } 7849 } 7850 if (strlencmp(cmd, "mute") == 0) 7851 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7852 else if (strlencmp(cmd, "unmute") == 0) 7853 new_mute = 0; 7854 else 7855 return -EINVAL; 7856 } 7857 7858 if (tp_features.mixer_no_level_control) { 7859 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7860 new_mute ? "" : "un"); 7861 rc = volume_set_mute(!!new_mute); 7862 } else { 7863 tpacpi_disclose_usertask("procfs volume", 7864 "%smute and set level to %d\n", 7865 new_mute ? "" : "un", new_level); 7866 rc = volume_set_status(new_mute | new_level); 7867 } 7868 volume_alsa_notify_change(); 7869 7870 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7871 } 7872 7873 static struct ibm_struct volume_driver_data = { 7874 .name = "volume", 7875 .read = volume_read, 7876 .write = volume_write, 7877 .exit = volume_exit, 7878 .suspend = volume_suspend, 7879 .resume = volume_resume, 7880 .shutdown = volume_shutdown, 7881 }; 7882 7883 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7884 7885 #define alsa_card NULL 7886 7887 static inline void volume_alsa_notify_change(void) 7888 { 7889 } 7890 7891 static int __init volume_init(struct ibm_init_struct *iibm) 7892 { 7893 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7894 7895 return 1; 7896 } 7897 7898 static struct ibm_struct volume_driver_data = { 7899 .name = "volume", 7900 }; 7901 7902 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7903 7904 /************************************************************************* 7905 * Fan subdriver 7906 */ 7907 7908 /* 7909 * FAN ACCESS MODES 7910 * 7911 * TPACPI_FAN_RD_ACPI_GFAN: 7912 * ACPI GFAN method: returns fan level 7913 * 7914 * see TPACPI_FAN_WR_ACPI_SFAN 7915 * EC 0x2f (HFSP) not available if GFAN exists 7916 * 7917 * TPACPI_FAN_WR_ACPI_SFAN: 7918 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7919 * 7920 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7921 * it for writing. 7922 * 7923 * TPACPI_FAN_WR_TPEC: 7924 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7925 * Supported on almost all ThinkPads 7926 * 7927 * Fan speed changes of any sort (including those caused by the 7928 * disengaged mode) are usually done slowly by the firmware as the 7929 * maximum amount of fan duty cycle change per second seems to be 7930 * limited. 7931 * 7932 * Reading is not available if GFAN exists. 7933 * Writing is not available if SFAN exists. 7934 * 7935 * Bits 7936 * 7 automatic mode engaged; 7937 * (default operation mode of the ThinkPad) 7938 * fan level is ignored in this mode. 7939 * 6 full speed mode (takes precedence over bit 7); 7940 * not available on all thinkpads. May disable 7941 * the tachometer while the fan controller ramps up 7942 * the speed (which can take up to a few *minutes*). 7943 * Speeds up fan to 100% duty-cycle, which is far above 7944 * the standard RPM levels. It is not impossible that 7945 * it could cause hardware damage. 7946 * 5-3 unused in some models. Extra bits for fan level 7947 * in others, but still useless as all values above 7948 * 7 map to the same speed as level 7 in these models. 7949 * 2-0 fan level (0..7 usually) 7950 * 0x00 = stop 7951 * 0x07 = max (set when temperatures critical) 7952 * Some ThinkPads may have other levels, see 7953 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7954 * 7955 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7956 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7957 * does so, its initial value is meaningless (0x07). 7958 * 7959 * For firmware bugs, refer to: 7960 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7961 * 7962 * ---- 7963 * 7964 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7965 * Main fan tachometer reading (in RPM) 7966 * 7967 * This register is present on all ThinkPads with a new-style EC, and 7968 * it is known not to be present on the A21m/e, and T22, as there is 7969 * something else in offset 0x84 according to the ACPI DSDT. Other 7970 * ThinkPads from this same time period (and earlier) probably lack the 7971 * tachometer as well. 7972 * 7973 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7974 * was never fixed by IBM to report the EC firmware version string 7975 * probably support the tachometer (like the early X models), so 7976 * detecting it is quite hard. We need more data to know for sure. 7977 * 7978 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7979 * might result. 7980 * 7981 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7982 * mode. 7983 * 7984 * For firmware bugs, refer to: 7985 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7986 * 7987 * ---- 7988 * 7989 * ThinkPad EC register 0x31 bit 0 (only on select models) 7990 * 7991 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7992 * show the speed of the main fan. When bit 0 of EC register 0x31 7993 * is one, the tachometer registers show the speed of the auxiliary 7994 * fan. 7995 * 7996 * Fan control seems to affect both fans, regardless of the state 7997 * of this bit. 7998 * 7999 * So far, only the firmware for the X60/X61 non-tablet versions 8000 * seem to support this (firmware TP-7M). 8001 * 8002 * TPACPI_FAN_WR_ACPI_FANS: 8003 * ThinkPad X31, X40, X41. Not available in the X60. 8004 * 8005 * FANS ACPI handle: takes three arguments: low speed, medium speed, 8006 * high speed. ACPI DSDT seems to map these three speeds to levels 8007 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 8008 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 8009 * 8010 * The speeds are stored on handles 8011 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 8012 * 8013 * There are three default speed sets, accessible as handles: 8014 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 8015 * 8016 * ACPI DSDT switches which set is in use depending on various 8017 * factors. 8018 * 8019 * TPACPI_FAN_WR_TPEC is also available and should be used to 8020 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 8021 * but the ACPI tables just mention level 7. 8022 */ 8023 8024 enum { /* Fan control constants */ 8025 fan_status_offset = 0x2f, /* EC register 0x2f */ 8026 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 8027 * 0x84 must be read before 0x85 */ 8028 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 8029 bit 0 selects which fan is active */ 8030 8031 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 8032 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 8033 8034 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 8035 }; 8036 8037 enum fan_status_access_mode { 8038 TPACPI_FAN_NONE = 0, /* No fan status or control */ 8039 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 8040 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 8041 }; 8042 8043 enum fan_control_access_mode { 8044 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 8045 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 8046 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 8047 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 8048 }; 8049 8050 enum fan_control_commands { 8051 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 8052 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 8053 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 8054 * and also watchdog cmd */ 8055 }; 8056 8057 static bool fan_control_allowed; 8058 8059 static enum fan_status_access_mode fan_status_access_mode; 8060 static enum fan_control_access_mode fan_control_access_mode; 8061 static enum fan_control_commands fan_control_commands; 8062 8063 static u8 fan_control_initial_status; 8064 static u8 fan_control_desired_level; 8065 static u8 fan_control_resume_level; 8066 static int fan_watchdog_maxinterval; 8067 8068 static struct mutex fan_mutex; 8069 8070 static void fan_watchdog_fire(struct work_struct *ignored); 8071 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 8072 8073 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 8074 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 8075 "\\FSPD", /* 600e/x, 770e, 770x */ 8076 ); /* all others */ 8077 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 8078 "JFNS", /* 770x-JL */ 8079 ); /* all others */ 8080 8081 /* 8082 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 8083 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 8084 * be in auto mode (0x80). 8085 * 8086 * This is corrected by any write to HFSP either by the driver, or 8087 * by the firmware. 8088 * 8089 * We assume 0x07 really means auto mode while this quirk is active, 8090 * as this is far more likely than the ThinkPad being in level 7, 8091 * which is only used by the firmware during thermal emergencies. 8092 * 8093 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 8094 * TP-70 (T43, R52), which are known to be buggy. 8095 */ 8096 8097 static void fan_quirk1_setup(void) 8098 { 8099 if (fan_control_initial_status == 0x07) { 8100 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n"); 8101 tp_features.fan_ctrl_status_undef = 1; 8102 } 8103 } 8104 8105 static void fan_quirk1_handle(u8 *fan_status) 8106 { 8107 if (unlikely(tp_features.fan_ctrl_status_undef)) { 8108 if (*fan_status != fan_control_initial_status) { 8109 /* something changed the HFSP regisnter since 8110 * driver init time, so it is not undefined 8111 * anymore */ 8112 tp_features.fan_ctrl_status_undef = 0; 8113 } else { 8114 /* Return most likely status. In fact, it 8115 * might be the only possible status */ 8116 *fan_status = TP_EC_FAN_AUTO; 8117 } 8118 } 8119 } 8120 8121 /* Select main fan on X60/X61, NOOP on others */ 8122 static bool fan_select_fan1(void) 8123 { 8124 if (tp_features.second_fan) { 8125 u8 val; 8126 8127 if (ec_read(fan_select_offset, &val) < 0) 8128 return false; 8129 val &= 0xFEU; 8130 if (ec_write(fan_select_offset, val) < 0) 8131 return false; 8132 } 8133 return true; 8134 } 8135 8136 /* Select secondary fan on X60/X61 */ 8137 static bool fan_select_fan2(void) 8138 { 8139 u8 val; 8140 8141 if (!tp_features.second_fan) 8142 return false; 8143 8144 if (ec_read(fan_select_offset, &val) < 0) 8145 return false; 8146 val |= 0x01U; 8147 if (ec_write(fan_select_offset, val) < 0) 8148 return false; 8149 8150 return true; 8151 } 8152 8153 /* 8154 * Call with fan_mutex held 8155 */ 8156 static void fan_update_desired_level(u8 status) 8157 { 8158 if ((status & 8159 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8160 if (status > 7) 8161 fan_control_desired_level = 7; 8162 else 8163 fan_control_desired_level = status; 8164 } 8165 } 8166 8167 static int fan_get_status(u8 *status) 8168 { 8169 u8 s; 8170 8171 /* TODO: 8172 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8173 8174 switch (fan_status_access_mode) { 8175 case TPACPI_FAN_RD_ACPI_GFAN: { 8176 /* 570, 600e/x, 770e, 770x */ 8177 int res; 8178 8179 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8180 return -EIO; 8181 8182 if (likely(status)) 8183 *status = res & 0x07; 8184 8185 break; 8186 } 8187 case TPACPI_FAN_RD_TPEC: 8188 /* all except 570, 600e/x, 770e, 770x */ 8189 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8190 return -EIO; 8191 8192 if (likely(status)) { 8193 *status = s; 8194 fan_quirk1_handle(status); 8195 } 8196 8197 break; 8198 8199 default: 8200 return -ENXIO; 8201 } 8202 8203 return 0; 8204 } 8205 8206 static int fan_get_status_safe(u8 *status) 8207 { 8208 int rc; 8209 u8 s; 8210 8211 if (mutex_lock_killable(&fan_mutex)) 8212 return -ERESTARTSYS; 8213 rc = fan_get_status(&s); 8214 if (!rc) 8215 fan_update_desired_level(s); 8216 mutex_unlock(&fan_mutex); 8217 8218 if (rc) 8219 return rc; 8220 if (status) 8221 *status = s; 8222 8223 return 0; 8224 } 8225 8226 static int fan_get_speed(unsigned int *speed) 8227 { 8228 u8 hi, lo; 8229 8230 switch (fan_status_access_mode) { 8231 case TPACPI_FAN_RD_TPEC: 8232 /* all except 570, 600e/x, 770e, 770x */ 8233 if (unlikely(!fan_select_fan1())) 8234 return -EIO; 8235 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8236 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8237 return -EIO; 8238 8239 if (likely(speed)) 8240 *speed = (hi << 8) | lo; 8241 8242 break; 8243 8244 default: 8245 return -ENXIO; 8246 } 8247 8248 return 0; 8249 } 8250 8251 static int fan2_get_speed(unsigned int *speed) 8252 { 8253 u8 hi, lo; 8254 bool rc; 8255 8256 switch (fan_status_access_mode) { 8257 case TPACPI_FAN_RD_TPEC: 8258 /* all except 570, 600e/x, 770e, 770x */ 8259 if (unlikely(!fan_select_fan2())) 8260 return -EIO; 8261 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8262 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8263 fan_select_fan1(); /* play it safe */ 8264 if (rc) 8265 return -EIO; 8266 8267 if (likely(speed)) 8268 *speed = (hi << 8) | lo; 8269 8270 break; 8271 8272 default: 8273 return -ENXIO; 8274 } 8275 8276 return 0; 8277 } 8278 8279 static int fan_set_level(int level) 8280 { 8281 if (!fan_control_allowed) 8282 return -EPERM; 8283 8284 switch (fan_control_access_mode) { 8285 case TPACPI_FAN_WR_ACPI_SFAN: 8286 if ((level < 0) || (level > 7)) 8287 return -EINVAL; 8288 8289 if (tp_features.second_fan_ctl) { 8290 if (!fan_select_fan2() || 8291 !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) { 8292 pr_warn("Couldn't set 2nd fan level, disabling support\n"); 8293 tp_features.second_fan_ctl = 0; 8294 } 8295 fan_select_fan1(); 8296 } 8297 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8298 return -EIO; 8299 break; 8300 8301 case TPACPI_FAN_WR_ACPI_FANS: 8302 case TPACPI_FAN_WR_TPEC: 8303 if (!(level & TP_EC_FAN_AUTO) && 8304 !(level & TP_EC_FAN_FULLSPEED) && 8305 ((level < 0) || (level > 7))) 8306 return -EINVAL; 8307 8308 /* safety net should the EC not support AUTO 8309 * or FULLSPEED mode bits and just ignore them */ 8310 if (level & TP_EC_FAN_FULLSPEED) 8311 level |= 7; /* safety min speed 7 */ 8312 else if (level & TP_EC_FAN_AUTO) 8313 level |= 4; /* safety min speed 4 */ 8314 8315 if (tp_features.second_fan_ctl) { 8316 if (!fan_select_fan2() || 8317 !acpi_ec_write(fan_status_offset, level)) { 8318 pr_warn("Couldn't set 2nd fan level, disabling support\n"); 8319 tp_features.second_fan_ctl = 0; 8320 } 8321 fan_select_fan1(); 8322 8323 } 8324 if (!acpi_ec_write(fan_status_offset, level)) 8325 return -EIO; 8326 else 8327 tp_features.fan_ctrl_status_undef = 0; 8328 break; 8329 8330 default: 8331 return -ENXIO; 8332 } 8333 8334 vdbg_printk(TPACPI_DBG_FAN, 8335 "fan control: set fan control register to 0x%02x\n", level); 8336 return 0; 8337 } 8338 8339 static int fan_set_level_safe(int level) 8340 { 8341 int rc; 8342 8343 if (!fan_control_allowed) 8344 return -EPERM; 8345 8346 if (mutex_lock_killable(&fan_mutex)) 8347 return -ERESTARTSYS; 8348 8349 if (level == TPACPI_FAN_LAST_LEVEL) 8350 level = fan_control_desired_level; 8351 8352 rc = fan_set_level(level); 8353 if (!rc) 8354 fan_update_desired_level(level); 8355 8356 mutex_unlock(&fan_mutex); 8357 return rc; 8358 } 8359 8360 static int fan_set_enable(void) 8361 { 8362 u8 s; 8363 int rc; 8364 8365 if (!fan_control_allowed) 8366 return -EPERM; 8367 8368 if (mutex_lock_killable(&fan_mutex)) 8369 return -ERESTARTSYS; 8370 8371 switch (fan_control_access_mode) { 8372 case TPACPI_FAN_WR_ACPI_FANS: 8373 case TPACPI_FAN_WR_TPEC: 8374 rc = fan_get_status(&s); 8375 if (rc < 0) 8376 break; 8377 8378 /* Don't go out of emergency fan mode */ 8379 if (s != 7) { 8380 s &= 0x07; 8381 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8382 } 8383 8384 if (!acpi_ec_write(fan_status_offset, s)) 8385 rc = -EIO; 8386 else { 8387 tp_features.fan_ctrl_status_undef = 0; 8388 rc = 0; 8389 } 8390 break; 8391 8392 case TPACPI_FAN_WR_ACPI_SFAN: 8393 rc = fan_get_status(&s); 8394 if (rc < 0) 8395 break; 8396 8397 s &= 0x07; 8398 8399 /* Set fan to at least level 4 */ 8400 s |= 4; 8401 8402 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8403 rc = -EIO; 8404 else 8405 rc = 0; 8406 break; 8407 8408 default: 8409 rc = -ENXIO; 8410 } 8411 8412 mutex_unlock(&fan_mutex); 8413 8414 if (!rc) 8415 vdbg_printk(TPACPI_DBG_FAN, 8416 "fan control: set fan control register to 0x%02x\n", 8417 s); 8418 return rc; 8419 } 8420 8421 static int fan_set_disable(void) 8422 { 8423 int rc; 8424 8425 if (!fan_control_allowed) 8426 return -EPERM; 8427 8428 if (mutex_lock_killable(&fan_mutex)) 8429 return -ERESTARTSYS; 8430 8431 rc = 0; 8432 switch (fan_control_access_mode) { 8433 case TPACPI_FAN_WR_ACPI_FANS: 8434 case TPACPI_FAN_WR_TPEC: 8435 if (!acpi_ec_write(fan_status_offset, 0x00)) 8436 rc = -EIO; 8437 else { 8438 fan_control_desired_level = 0; 8439 tp_features.fan_ctrl_status_undef = 0; 8440 } 8441 break; 8442 8443 case TPACPI_FAN_WR_ACPI_SFAN: 8444 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8445 rc = -EIO; 8446 else 8447 fan_control_desired_level = 0; 8448 break; 8449 8450 default: 8451 rc = -ENXIO; 8452 } 8453 8454 if (!rc) 8455 vdbg_printk(TPACPI_DBG_FAN, 8456 "fan control: set fan control register to 0\n"); 8457 8458 mutex_unlock(&fan_mutex); 8459 return rc; 8460 } 8461 8462 static int fan_set_speed(int speed) 8463 { 8464 int rc; 8465 8466 if (!fan_control_allowed) 8467 return -EPERM; 8468 8469 if (mutex_lock_killable(&fan_mutex)) 8470 return -ERESTARTSYS; 8471 8472 rc = 0; 8473 switch (fan_control_access_mode) { 8474 case TPACPI_FAN_WR_ACPI_FANS: 8475 if (speed >= 0 && speed <= 65535) { 8476 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8477 speed, speed, speed)) 8478 rc = -EIO; 8479 } else 8480 rc = -EINVAL; 8481 break; 8482 8483 default: 8484 rc = -ENXIO; 8485 } 8486 8487 mutex_unlock(&fan_mutex); 8488 return rc; 8489 } 8490 8491 static void fan_watchdog_reset(void) 8492 { 8493 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8494 return; 8495 8496 if (fan_watchdog_maxinterval > 0 && 8497 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8498 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8499 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8500 else 8501 cancel_delayed_work(&fan_watchdog_task); 8502 } 8503 8504 static void fan_watchdog_fire(struct work_struct *ignored) 8505 { 8506 int rc; 8507 8508 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8509 return; 8510 8511 pr_notice("fan watchdog: enabling fan\n"); 8512 rc = fan_set_enable(); 8513 if (rc < 0) { 8514 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n", 8515 rc); 8516 /* reschedule for later */ 8517 fan_watchdog_reset(); 8518 } 8519 } 8520 8521 /* 8522 * SYSFS fan layout: hwmon compatible (device) 8523 * 8524 * pwm*_enable: 8525 * 0: "disengaged" mode 8526 * 1: manual mode 8527 * 2: native EC "auto" mode (recommended, hardware default) 8528 * 8529 * pwm*: set speed in manual mode, ignored otherwise. 8530 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8531 * interpolation. 8532 * 8533 * fan*_input: tachometer reading, RPM 8534 * 8535 * 8536 * SYSFS fan layout: extensions 8537 * 8538 * fan_watchdog (driver): 8539 * fan watchdog interval in seconds, 0 disables (default), max 120 8540 */ 8541 8542 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8543 static ssize_t fan_pwm1_enable_show(struct device *dev, 8544 struct device_attribute *attr, 8545 char *buf) 8546 { 8547 int res, mode; 8548 u8 status; 8549 8550 res = fan_get_status_safe(&status); 8551 if (res) 8552 return res; 8553 8554 if (status & TP_EC_FAN_FULLSPEED) { 8555 mode = 0; 8556 } else if (status & TP_EC_FAN_AUTO) { 8557 mode = 2; 8558 } else 8559 mode = 1; 8560 8561 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8562 } 8563 8564 static ssize_t fan_pwm1_enable_store(struct device *dev, 8565 struct device_attribute *attr, 8566 const char *buf, size_t count) 8567 { 8568 unsigned long t; 8569 int res, level; 8570 8571 if (parse_strtoul(buf, 2, &t)) 8572 return -EINVAL; 8573 8574 tpacpi_disclose_usertask("hwmon pwm1_enable", 8575 "set fan mode to %lu\n", t); 8576 8577 switch (t) { 8578 case 0: 8579 level = TP_EC_FAN_FULLSPEED; 8580 break; 8581 case 1: 8582 level = TPACPI_FAN_LAST_LEVEL; 8583 break; 8584 case 2: 8585 level = TP_EC_FAN_AUTO; 8586 break; 8587 case 3: 8588 /* reserved for software-controlled auto mode */ 8589 return -ENOSYS; 8590 default: 8591 return -EINVAL; 8592 } 8593 8594 res = fan_set_level_safe(level); 8595 if (res == -ENXIO) 8596 return -EINVAL; 8597 else if (res < 0) 8598 return res; 8599 8600 fan_watchdog_reset(); 8601 8602 return count; 8603 } 8604 8605 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8606 fan_pwm1_enable_show, fan_pwm1_enable_store); 8607 8608 /* sysfs fan pwm1 ------------------------------------------------------ */ 8609 static ssize_t fan_pwm1_show(struct device *dev, 8610 struct device_attribute *attr, 8611 char *buf) 8612 { 8613 int res; 8614 u8 status; 8615 8616 res = fan_get_status_safe(&status); 8617 if (res) 8618 return res; 8619 8620 if ((status & 8621 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8622 status = fan_control_desired_level; 8623 8624 if (status > 7) 8625 status = 7; 8626 8627 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8628 } 8629 8630 static ssize_t fan_pwm1_store(struct device *dev, 8631 struct device_attribute *attr, 8632 const char *buf, size_t count) 8633 { 8634 unsigned long s; 8635 int rc; 8636 u8 status, newlevel; 8637 8638 if (parse_strtoul(buf, 255, &s)) 8639 return -EINVAL; 8640 8641 tpacpi_disclose_usertask("hwmon pwm1", 8642 "set fan speed to %lu\n", s); 8643 8644 /* scale down from 0-255 to 0-7 */ 8645 newlevel = (s >> 5) & 0x07; 8646 8647 if (mutex_lock_killable(&fan_mutex)) 8648 return -ERESTARTSYS; 8649 8650 rc = fan_get_status(&status); 8651 if (!rc && (status & 8652 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8653 rc = fan_set_level(newlevel); 8654 if (rc == -ENXIO) 8655 rc = -EINVAL; 8656 else if (!rc) { 8657 fan_update_desired_level(newlevel); 8658 fan_watchdog_reset(); 8659 } 8660 } 8661 8662 mutex_unlock(&fan_mutex); 8663 return (rc) ? rc : count; 8664 } 8665 8666 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8667 8668 /* sysfs fan fan1_input ------------------------------------------------ */ 8669 static ssize_t fan_fan1_input_show(struct device *dev, 8670 struct device_attribute *attr, 8671 char *buf) 8672 { 8673 int res; 8674 unsigned int speed; 8675 8676 res = fan_get_speed(&speed); 8677 if (res < 0) 8678 return res; 8679 8680 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8681 } 8682 8683 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8684 8685 /* sysfs fan fan2_input ------------------------------------------------ */ 8686 static ssize_t fan_fan2_input_show(struct device *dev, 8687 struct device_attribute *attr, 8688 char *buf) 8689 { 8690 int res; 8691 unsigned int speed; 8692 8693 res = fan2_get_speed(&speed); 8694 if (res < 0) 8695 return res; 8696 8697 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8698 } 8699 8700 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8701 8702 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8703 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf) 8704 { 8705 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8706 } 8707 8708 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf, 8709 size_t count) 8710 { 8711 unsigned long t; 8712 8713 if (parse_strtoul(buf, 120, &t)) 8714 return -EINVAL; 8715 8716 if (!fan_control_allowed) 8717 return -EPERM; 8718 8719 fan_watchdog_maxinterval = t; 8720 fan_watchdog_reset(); 8721 8722 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8723 8724 return count; 8725 } 8726 static DRIVER_ATTR_RW(fan_watchdog); 8727 8728 /* --------------------------------------------------------------------- */ 8729 static struct attribute *fan_attributes[] = { 8730 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8731 &dev_attr_fan1_input.attr, 8732 NULL, /* for fan2_input */ 8733 NULL 8734 }; 8735 8736 static const struct attribute_group fan_attr_group = { 8737 .attrs = fan_attributes, 8738 }; 8739 8740 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8741 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8742 #define TPACPI_FAN_2CTL 0x0004 /* selects fan2 control */ 8743 8744 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8745 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1), 8746 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1), 8747 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1), 8748 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1), 8749 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN), 8750 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN), 8751 TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL), /* P70 */ 8752 TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL), /* P50 */ 8753 TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL), /* P71 */ 8754 TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL), /* P51 */ 8755 TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL), /* P52 / P72 */ 8756 TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (1st gen) */ 8757 TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (2nd gen) */ 8758 }; 8759 8760 static int __init fan_init(struct ibm_init_struct *iibm) 8761 { 8762 int rc; 8763 unsigned long quirks; 8764 8765 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8766 "initializing fan subdriver\n"); 8767 8768 mutex_init(&fan_mutex); 8769 fan_status_access_mode = TPACPI_FAN_NONE; 8770 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8771 fan_control_commands = 0; 8772 fan_watchdog_maxinterval = 0; 8773 tp_features.fan_ctrl_status_undef = 0; 8774 tp_features.second_fan = 0; 8775 tp_features.second_fan_ctl = 0; 8776 fan_control_desired_level = 7; 8777 8778 if (tpacpi_is_ibm()) { 8779 TPACPI_ACPIHANDLE_INIT(fans); 8780 TPACPI_ACPIHANDLE_INIT(gfan); 8781 TPACPI_ACPIHANDLE_INIT(sfan); 8782 } 8783 8784 quirks = tpacpi_check_quirks(fan_quirk_table, 8785 ARRAY_SIZE(fan_quirk_table)); 8786 8787 if (gfan_handle) { 8788 /* 570, 600e/x, 770e, 770x */ 8789 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8790 } else { 8791 /* all other ThinkPads: note that even old-style 8792 * ThinkPad ECs supports the fan control register */ 8793 if (likely(acpi_ec_read(fan_status_offset, 8794 &fan_control_initial_status))) { 8795 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8796 if (quirks & TPACPI_FAN_Q1) 8797 fan_quirk1_setup(); 8798 if (quirks & TPACPI_FAN_2FAN) { 8799 tp_features.second_fan = 1; 8800 pr_info("secondary fan support enabled\n"); 8801 } 8802 if (quirks & TPACPI_FAN_2CTL) { 8803 tp_features.second_fan = 1; 8804 tp_features.second_fan_ctl = 1; 8805 pr_info("secondary fan control enabled\n"); 8806 } 8807 } else { 8808 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n"); 8809 return 1; 8810 } 8811 } 8812 8813 if (sfan_handle) { 8814 /* 570, 770x-JL */ 8815 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8816 fan_control_commands |= 8817 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8818 } else { 8819 if (!gfan_handle) { 8820 /* gfan without sfan means no fan control */ 8821 /* all other models implement TP EC 0x2f control */ 8822 8823 if (fans_handle) { 8824 /* X31, X40, X41 */ 8825 fan_control_access_mode = 8826 TPACPI_FAN_WR_ACPI_FANS; 8827 fan_control_commands |= 8828 TPACPI_FAN_CMD_SPEED | 8829 TPACPI_FAN_CMD_LEVEL | 8830 TPACPI_FAN_CMD_ENABLE; 8831 } else { 8832 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8833 fan_control_commands |= 8834 TPACPI_FAN_CMD_LEVEL | 8835 TPACPI_FAN_CMD_ENABLE; 8836 } 8837 } 8838 } 8839 8840 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8841 "fan is %s, modes %d, %d\n", 8842 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8843 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8844 fan_status_access_mode, fan_control_access_mode); 8845 8846 /* fan control master switch */ 8847 if (!fan_control_allowed) { 8848 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8849 fan_control_commands = 0; 8850 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8851 "fan control features disabled by parameter\n"); 8852 } 8853 8854 /* update fan_control_desired_level */ 8855 if (fan_status_access_mode != TPACPI_FAN_NONE) 8856 fan_get_status_safe(NULL); 8857 8858 if (fan_status_access_mode != TPACPI_FAN_NONE || 8859 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8860 if (tp_features.second_fan) { 8861 /* attach second fan tachometer */ 8862 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8863 &dev_attr_fan2_input.attr; 8864 } 8865 rc = sysfs_create_group(&tpacpi_hwmon->kobj, 8866 &fan_attr_group); 8867 if (rc < 0) 8868 return rc; 8869 8870 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8871 &driver_attr_fan_watchdog); 8872 if (rc < 0) { 8873 sysfs_remove_group(&tpacpi_hwmon->kobj, 8874 &fan_attr_group); 8875 return rc; 8876 } 8877 return 0; 8878 } else 8879 return 1; 8880 } 8881 8882 static void fan_exit(void) 8883 { 8884 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8885 "cancelling any pending fan watchdog tasks\n"); 8886 8887 /* FIXME: can we really do this unconditionally? */ 8888 sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group); 8889 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8890 &driver_attr_fan_watchdog); 8891 8892 cancel_delayed_work(&fan_watchdog_task); 8893 flush_workqueue(tpacpi_wq); 8894 } 8895 8896 static void fan_suspend(void) 8897 { 8898 int rc; 8899 8900 if (!fan_control_allowed) 8901 return; 8902 8903 /* Store fan status in cache */ 8904 fan_control_resume_level = 0; 8905 rc = fan_get_status_safe(&fan_control_resume_level); 8906 if (rc < 0) 8907 pr_notice("failed to read fan level for later restore during resume: %d\n", 8908 rc); 8909 8910 /* if it is undefined, don't attempt to restore it. 8911 * KEEP THIS LAST */ 8912 if (tp_features.fan_ctrl_status_undef) 8913 fan_control_resume_level = 0; 8914 } 8915 8916 static void fan_resume(void) 8917 { 8918 u8 current_level = 7; 8919 bool do_set = false; 8920 int rc; 8921 8922 /* DSDT *always* updates status on resume */ 8923 tp_features.fan_ctrl_status_undef = 0; 8924 8925 if (!fan_control_allowed || 8926 !fan_control_resume_level || 8927 (fan_get_status_safe(¤t_level) < 0)) 8928 return; 8929 8930 switch (fan_control_access_mode) { 8931 case TPACPI_FAN_WR_ACPI_SFAN: 8932 /* never decrease fan level */ 8933 do_set = (fan_control_resume_level > current_level); 8934 break; 8935 case TPACPI_FAN_WR_ACPI_FANS: 8936 case TPACPI_FAN_WR_TPEC: 8937 /* never decrease fan level, scale is: 8938 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8939 * 8940 * We expect the firmware to set either 7 or AUTO, but we 8941 * handle FULLSPEED out of paranoia. 8942 * 8943 * So, we can safely only restore FULLSPEED or 7, anything 8944 * else could slow the fan. Restoring AUTO is useless, at 8945 * best that's exactly what the DSDT already set (it is the 8946 * slower it uses). 8947 * 8948 * Always keep in mind that the DSDT *will* have set the 8949 * fans to what the vendor supposes is the best level. We 8950 * muck with it only to speed the fan up. 8951 */ 8952 if (fan_control_resume_level != 7 && 8953 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8954 return; 8955 else 8956 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8957 (current_level != fan_control_resume_level); 8958 break; 8959 default: 8960 return; 8961 } 8962 if (do_set) { 8963 pr_notice("restoring fan level to 0x%02x\n", 8964 fan_control_resume_level); 8965 rc = fan_set_level_safe(fan_control_resume_level); 8966 if (rc < 0) 8967 pr_notice("failed to restore fan level: %d\n", rc); 8968 } 8969 } 8970 8971 static int fan_read(struct seq_file *m) 8972 { 8973 int rc; 8974 u8 status; 8975 unsigned int speed = 0; 8976 8977 switch (fan_status_access_mode) { 8978 case TPACPI_FAN_RD_ACPI_GFAN: 8979 /* 570, 600e/x, 770e, 770x */ 8980 rc = fan_get_status_safe(&status); 8981 if (rc < 0) 8982 return rc; 8983 8984 seq_printf(m, "status:\t\t%s\n" 8985 "level:\t\t%d\n", 8986 (status != 0) ? "enabled" : "disabled", status); 8987 break; 8988 8989 case TPACPI_FAN_RD_TPEC: 8990 /* all except 570, 600e/x, 770e, 770x */ 8991 rc = fan_get_status_safe(&status); 8992 if (rc < 0) 8993 return rc; 8994 8995 seq_printf(m, "status:\t\t%s\n", 8996 (status != 0) ? "enabled" : "disabled"); 8997 8998 rc = fan_get_speed(&speed); 8999 if (rc < 0) 9000 return rc; 9001 9002 seq_printf(m, "speed:\t\t%d\n", speed); 9003 9004 if (status & TP_EC_FAN_FULLSPEED) 9005 /* Disengaged mode takes precedence */ 9006 seq_printf(m, "level:\t\tdisengaged\n"); 9007 else if (status & TP_EC_FAN_AUTO) 9008 seq_printf(m, "level:\t\tauto\n"); 9009 else 9010 seq_printf(m, "level:\t\t%d\n", status); 9011 break; 9012 9013 case TPACPI_FAN_NONE: 9014 default: 9015 seq_printf(m, "status:\t\tnot supported\n"); 9016 } 9017 9018 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 9019 seq_printf(m, "commands:\tlevel <level>"); 9020 9021 switch (fan_control_access_mode) { 9022 case TPACPI_FAN_WR_ACPI_SFAN: 9023 seq_printf(m, " (<level> is 0-7)\n"); 9024 break; 9025 9026 default: 9027 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n"); 9028 break; 9029 } 9030 } 9031 9032 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 9033 seq_printf(m, "commands:\tenable, disable\n" 9034 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n"); 9035 9036 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 9037 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n"); 9038 9039 return 0; 9040 } 9041 9042 static int fan_write_cmd_level(const char *cmd, int *rc) 9043 { 9044 int level; 9045 9046 if (strlencmp(cmd, "level auto") == 0) 9047 level = TP_EC_FAN_AUTO; 9048 else if ((strlencmp(cmd, "level disengaged") == 0) | 9049 (strlencmp(cmd, "level full-speed") == 0)) 9050 level = TP_EC_FAN_FULLSPEED; 9051 else if (sscanf(cmd, "level %d", &level) != 1) 9052 return 0; 9053 9054 *rc = fan_set_level_safe(level); 9055 if (*rc == -ENXIO) 9056 pr_err("level command accepted for unsupported access mode %d\n", 9057 fan_control_access_mode); 9058 else if (!*rc) 9059 tpacpi_disclose_usertask("procfs fan", 9060 "set level to %d\n", level); 9061 9062 return 1; 9063 } 9064 9065 static int fan_write_cmd_enable(const char *cmd, int *rc) 9066 { 9067 if (strlencmp(cmd, "enable") != 0) 9068 return 0; 9069 9070 *rc = fan_set_enable(); 9071 if (*rc == -ENXIO) 9072 pr_err("enable command accepted for unsupported access mode %d\n", 9073 fan_control_access_mode); 9074 else if (!*rc) 9075 tpacpi_disclose_usertask("procfs fan", "enable\n"); 9076 9077 return 1; 9078 } 9079 9080 static int fan_write_cmd_disable(const char *cmd, int *rc) 9081 { 9082 if (strlencmp(cmd, "disable") != 0) 9083 return 0; 9084 9085 *rc = fan_set_disable(); 9086 if (*rc == -ENXIO) 9087 pr_err("disable command accepted for unsupported access mode %d\n", 9088 fan_control_access_mode); 9089 else if (!*rc) 9090 tpacpi_disclose_usertask("procfs fan", "disable\n"); 9091 9092 return 1; 9093 } 9094 9095 static int fan_write_cmd_speed(const char *cmd, int *rc) 9096 { 9097 int speed; 9098 9099 /* TODO: 9100 * Support speed <low> <medium> <high> ? */ 9101 9102 if (sscanf(cmd, "speed %d", &speed) != 1) 9103 return 0; 9104 9105 *rc = fan_set_speed(speed); 9106 if (*rc == -ENXIO) 9107 pr_err("speed command accepted for unsupported access mode %d\n", 9108 fan_control_access_mode); 9109 else if (!*rc) 9110 tpacpi_disclose_usertask("procfs fan", 9111 "set speed to %d\n", speed); 9112 9113 return 1; 9114 } 9115 9116 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 9117 { 9118 int interval; 9119 9120 if (sscanf(cmd, "watchdog %d", &interval) != 1) 9121 return 0; 9122 9123 if (interval < 0 || interval > 120) 9124 *rc = -EINVAL; 9125 else { 9126 fan_watchdog_maxinterval = interval; 9127 tpacpi_disclose_usertask("procfs fan", 9128 "set watchdog timer to %d\n", 9129 interval); 9130 } 9131 9132 return 1; 9133 } 9134 9135 static int fan_write(char *buf) 9136 { 9137 char *cmd; 9138 int rc = 0; 9139 9140 while (!rc && (cmd = strsep(&buf, ","))) { 9141 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 9142 fan_write_cmd_level(cmd, &rc)) && 9143 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 9144 (fan_write_cmd_enable(cmd, &rc) || 9145 fan_write_cmd_disable(cmd, &rc) || 9146 fan_write_cmd_watchdog(cmd, &rc))) && 9147 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 9148 fan_write_cmd_speed(cmd, &rc)) 9149 ) 9150 rc = -EINVAL; 9151 else if (!rc) 9152 fan_watchdog_reset(); 9153 } 9154 9155 return rc; 9156 } 9157 9158 static struct ibm_struct fan_driver_data = { 9159 .name = "fan", 9160 .read = fan_read, 9161 .write = fan_write, 9162 .exit = fan_exit, 9163 .suspend = fan_suspend, 9164 .resume = fan_resume, 9165 }; 9166 9167 /************************************************************************* 9168 * Mute LED subdriver 9169 */ 9170 9171 #define TPACPI_LED_MAX 2 9172 9173 struct tp_led_table { 9174 acpi_string name; 9175 int on_value; 9176 int off_value; 9177 int state; 9178 }; 9179 9180 static struct tp_led_table led_tables[TPACPI_LED_MAX] = { 9181 [LED_AUDIO_MUTE] = { 9182 .name = "SSMS", 9183 .on_value = 1, 9184 .off_value = 0, 9185 }, 9186 [LED_AUDIO_MICMUTE] = { 9187 .name = "MMTS", 9188 .on_value = 2, 9189 .off_value = 0, 9190 }, 9191 }; 9192 9193 static int mute_led_on_off(struct tp_led_table *t, bool state) 9194 { 9195 acpi_handle temp; 9196 int output; 9197 9198 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9199 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9200 return -EIO; 9201 } 9202 9203 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9204 state ? t->on_value : t->off_value)) 9205 return -EIO; 9206 9207 t->state = state; 9208 return state; 9209 } 9210 9211 static int tpacpi_led_set(int whichled, bool on) 9212 { 9213 struct tp_led_table *t; 9214 9215 t = &led_tables[whichled]; 9216 if (t->state < 0 || t->state == on) 9217 return t->state; 9218 return mute_led_on_off(t, on); 9219 } 9220 9221 static int tpacpi_led_mute_set(struct led_classdev *led_cdev, 9222 enum led_brightness brightness) 9223 { 9224 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF); 9225 } 9226 9227 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev, 9228 enum led_brightness brightness) 9229 { 9230 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF); 9231 } 9232 9233 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = { 9234 [LED_AUDIO_MUTE] = { 9235 .name = "platform::mute", 9236 .max_brightness = 1, 9237 .brightness_set_blocking = tpacpi_led_mute_set, 9238 .default_trigger = "audio-mute", 9239 }, 9240 [LED_AUDIO_MICMUTE] = { 9241 .name = "platform::micmute", 9242 .max_brightness = 1, 9243 .brightness_set_blocking = tpacpi_led_micmute_set, 9244 .default_trigger = "audio-micmute", 9245 }, 9246 }; 9247 9248 static int mute_led_init(struct ibm_init_struct *iibm) 9249 { 9250 acpi_handle temp; 9251 int i, err; 9252 9253 for (i = 0; i < TPACPI_LED_MAX; i++) { 9254 struct tp_led_table *t = &led_tables[i]; 9255 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9256 t->state = -ENODEV; 9257 continue; 9258 } 9259 9260 mute_led_cdev[i].brightness = ledtrig_audio_get(i); 9261 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]); 9262 if (err < 0) { 9263 while (i--) 9264 led_classdev_unregister(&mute_led_cdev[i]); 9265 return err; 9266 } 9267 } 9268 return 0; 9269 } 9270 9271 static void mute_led_exit(void) 9272 { 9273 int i; 9274 9275 for (i = 0; i < TPACPI_LED_MAX; i++) { 9276 led_classdev_unregister(&mute_led_cdev[i]); 9277 tpacpi_led_set(i, false); 9278 } 9279 } 9280 9281 static void mute_led_resume(void) 9282 { 9283 int i; 9284 9285 for (i = 0; i < TPACPI_LED_MAX; i++) { 9286 struct tp_led_table *t = &led_tables[i]; 9287 if (t->state >= 0) 9288 mute_led_on_off(t, t->state); 9289 } 9290 } 9291 9292 static struct ibm_struct mute_led_driver_data = { 9293 .name = "mute_led", 9294 .exit = mute_led_exit, 9295 .resume = mute_led_resume, 9296 }; 9297 9298 /* 9299 * Battery Wear Control Driver 9300 * Contact: Ognjen Galic <smclt30p@gmail.com> 9301 */ 9302 9303 /* Metadata */ 9304 9305 #define GET_START "BCTG" 9306 #define SET_START "BCCS" 9307 #define GET_STOP "BCSG" 9308 #define SET_STOP "BCSS" 9309 9310 #define START_ATTR "charge_start_threshold" 9311 #define STOP_ATTR "charge_stop_threshold" 9312 9313 enum { 9314 BAT_ANY = 0, 9315 BAT_PRIMARY = 1, 9316 BAT_SECONDARY = 2 9317 }; 9318 9319 enum { 9320 /* Error condition bit */ 9321 METHOD_ERR = BIT(31), 9322 }; 9323 9324 enum { 9325 /* This is used in the get/set helpers */ 9326 THRESHOLD_START, 9327 THRESHOLD_STOP, 9328 }; 9329 9330 struct tpacpi_battery_data { 9331 int charge_start; 9332 int start_support; 9333 int charge_stop; 9334 int stop_support; 9335 }; 9336 9337 struct tpacpi_battery_driver_data { 9338 struct tpacpi_battery_data batteries[3]; 9339 int individual_addressing; 9340 }; 9341 9342 static struct tpacpi_battery_driver_data battery_info; 9343 9344 /* ACPI helpers/functions/probes */ 9345 9346 /** 9347 * This evaluates a ACPI method call specific to the battery 9348 * ACPI extension. The specifics are that an error is marked 9349 * in the 32rd bit of the response, so we just check that here. 9350 */ 9351 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param) 9352 { 9353 int response; 9354 9355 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) { 9356 acpi_handle_err(hkey_handle, "%s: evaluate failed", method); 9357 return AE_ERROR; 9358 } 9359 if (response & METHOD_ERR) { 9360 acpi_handle_err(hkey_handle, 9361 "%s evaluated but flagged as error", method); 9362 return AE_ERROR; 9363 } 9364 *ret = response; 9365 return AE_OK; 9366 } 9367 9368 static int tpacpi_battery_get(int what, int battery, int *ret) 9369 { 9370 switch (what) { 9371 case THRESHOLD_START: 9372 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery)) 9373 return -ENODEV; 9374 9375 /* The value is in the low 8 bits of the response */ 9376 *ret = *ret & 0xFF; 9377 return 0; 9378 case THRESHOLD_STOP: 9379 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery)) 9380 return -ENODEV; 9381 /* Value is in lower 8 bits */ 9382 *ret = *ret & 0xFF; 9383 /* 9384 * On the stop value, if we return 0 that 9385 * does not make any sense. 0 means Default, which 9386 * means that charging stops at 100%, so we return 9387 * that. 9388 */ 9389 if (*ret == 0) 9390 *ret = 100; 9391 return 0; 9392 default: 9393 pr_crit("wrong parameter: %d", what); 9394 return -EINVAL; 9395 } 9396 } 9397 9398 static int tpacpi_battery_set(int what, int battery, int value) 9399 { 9400 int param, ret; 9401 /* The first 8 bits are the value of the threshold */ 9402 param = value; 9403 /* The battery ID is in bits 8-9, 2 bits */ 9404 param |= battery << 8; 9405 9406 switch (what) { 9407 case THRESHOLD_START: 9408 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) { 9409 pr_err("failed to set charge threshold on battery %d", 9410 battery); 9411 return -ENODEV; 9412 } 9413 return 0; 9414 case THRESHOLD_STOP: 9415 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) { 9416 pr_err("failed to set stop threshold: %d", battery); 9417 return -ENODEV; 9418 } 9419 return 0; 9420 default: 9421 pr_crit("wrong parameter: %d", what); 9422 return -EINVAL; 9423 } 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 */ 9439 if (acpi_has_method(hkey_handle, GET_START)) { 9440 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { 9441 pr_err("Error probing battery %d\n", battery); 9442 return -ENODEV; 9443 } 9444 /* Individual addressing is in bit 9 */ 9445 if (ret & BIT(9)) 9446 battery_info.individual_addressing = true; 9447 /* Support is marked in bit 8 */ 9448 if (ret & BIT(8)) 9449 battery_info.batteries[battery].start_support = 1; 9450 else 9451 return -ENODEV; 9452 if (tpacpi_battery_get(THRESHOLD_START, battery, 9453 &battery_info.batteries[battery].charge_start)) { 9454 pr_err("Error probing battery %d\n", battery); 9455 return -ENODEV; 9456 } 9457 } 9458 if (acpi_has_method(hkey_handle, GET_STOP)) { 9459 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) { 9460 pr_err("Error probing battery stop; %d\n", battery); 9461 return -ENODEV; 9462 } 9463 /* Support is marked in bit 8 */ 9464 if (ret & BIT(8)) 9465 battery_info.batteries[battery].stop_support = 1; 9466 else 9467 return -ENODEV; 9468 if (tpacpi_battery_get(THRESHOLD_STOP, battery, 9469 &battery_info.batteries[battery].charge_stop)) { 9470 pr_err("Error probing battery stop: %d\n", battery); 9471 return -ENODEV; 9472 } 9473 } 9474 pr_info("battery %d registered (start %d, stop %d)", 9475 battery, 9476 battery_info.batteries[battery].charge_start, 9477 battery_info.batteries[battery].charge_stop); 9478 9479 return 0; 9480 } 9481 9482 /* General helper functions */ 9483 9484 static int tpacpi_battery_get_id(const char *battery_name) 9485 { 9486 9487 if (strcmp(battery_name, "BAT0") == 0 || 9488 tp_features.battery_force_primary) 9489 return BAT_PRIMARY; 9490 if (strcmp(battery_name, "BAT1") == 0) 9491 return BAT_SECONDARY; 9492 /* 9493 * If for some reason the battery is not BAT0 nor is it 9494 * BAT1, we will assume it's the default, first battery, 9495 * AKA primary. 9496 */ 9497 pr_warn("unknown battery %s, assuming primary", battery_name); 9498 return BAT_PRIMARY; 9499 } 9500 9501 /* sysfs interface */ 9502 9503 static ssize_t tpacpi_battery_store(int what, 9504 struct device *dev, 9505 const char *buf, size_t count) 9506 { 9507 struct power_supply *supply = to_power_supply(dev); 9508 unsigned long value; 9509 int battery, rval; 9510 /* 9511 * Some systems have support for more than 9512 * one battery. If that is the case, 9513 * tpacpi_battery_probe marked that addressing 9514 * them individually is supported, so we do that 9515 * based on the device struct. 9516 * 9517 * On systems that are not supported, we assume 9518 * the primary as most of the ACPI calls fail 9519 * with "Any Battery" as the parameter. 9520 */ 9521 if (battery_info.individual_addressing) 9522 /* BAT_PRIMARY or BAT_SECONDARY */ 9523 battery = tpacpi_battery_get_id(supply->desc->name); 9524 else 9525 battery = BAT_PRIMARY; 9526 9527 rval = kstrtoul(buf, 10, &value); 9528 if (rval) 9529 return rval; 9530 9531 switch (what) { 9532 case THRESHOLD_START: 9533 if (!battery_info.batteries[battery].start_support) 9534 return -ENODEV; 9535 /* valid values are [0, 99] */ 9536 if (value > 99) 9537 return -EINVAL; 9538 if (value > battery_info.batteries[battery].charge_stop) 9539 return -EINVAL; 9540 if (tpacpi_battery_set(THRESHOLD_START, battery, value)) 9541 return -ENODEV; 9542 battery_info.batteries[battery].charge_start = value; 9543 return count; 9544 9545 case THRESHOLD_STOP: 9546 if (!battery_info.batteries[battery].stop_support) 9547 return -ENODEV; 9548 /* valid values are [1, 100] */ 9549 if (value < 1 || value > 100) 9550 return -EINVAL; 9551 if (value < battery_info.batteries[battery].charge_start) 9552 return -EINVAL; 9553 battery_info.batteries[battery].charge_stop = value; 9554 /* 9555 * When 100 is passed to stop, we need to flip 9556 * it to 0 as that the EC understands that as 9557 * "Default", which will charge to 100% 9558 */ 9559 if (value == 100) 9560 value = 0; 9561 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value)) 9562 return -EINVAL; 9563 return count; 9564 default: 9565 pr_crit("Wrong parameter: %d", what); 9566 return -EINVAL; 9567 } 9568 return count; 9569 } 9570 9571 static ssize_t tpacpi_battery_show(int what, 9572 struct device *dev, 9573 char *buf) 9574 { 9575 struct power_supply *supply = to_power_supply(dev); 9576 int ret, battery; 9577 /* 9578 * Some systems have support for more than 9579 * one battery. If that is the case, 9580 * tpacpi_battery_probe marked that addressing 9581 * them individually is supported, so we; 9582 * based on the device struct. 9583 * 9584 * On systems that are not supported, we assume 9585 * the primary as most of the ACPI calls fail 9586 * with "Any Battery" as the parameter. 9587 */ 9588 if (battery_info.individual_addressing) 9589 /* BAT_PRIMARY or BAT_SECONDARY */ 9590 battery = tpacpi_battery_get_id(supply->desc->name); 9591 else 9592 battery = BAT_PRIMARY; 9593 if (tpacpi_battery_get(what, battery, &ret)) 9594 return -ENODEV; 9595 return sprintf(buf, "%d\n", ret); 9596 } 9597 9598 static ssize_t charge_start_threshold_show(struct device *device, 9599 struct device_attribute *attr, 9600 char *buf) 9601 { 9602 return tpacpi_battery_show(THRESHOLD_START, device, buf); 9603 } 9604 9605 static ssize_t charge_stop_threshold_show(struct device *device, 9606 struct device_attribute *attr, 9607 char *buf) 9608 { 9609 return tpacpi_battery_show(THRESHOLD_STOP, device, buf); 9610 } 9611 9612 static ssize_t charge_start_threshold_store(struct device *dev, 9613 struct device_attribute *attr, 9614 const char *buf, size_t count) 9615 { 9616 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count); 9617 } 9618 9619 static ssize_t charge_stop_threshold_store(struct device *dev, 9620 struct device_attribute *attr, 9621 const char *buf, size_t count) 9622 { 9623 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count); 9624 } 9625 9626 static DEVICE_ATTR_RW(charge_start_threshold); 9627 static DEVICE_ATTR_RW(charge_stop_threshold); 9628 9629 static struct attribute *tpacpi_battery_attrs[] = { 9630 &dev_attr_charge_start_threshold.attr, 9631 &dev_attr_charge_stop_threshold.attr, 9632 NULL, 9633 }; 9634 9635 ATTRIBUTE_GROUPS(tpacpi_battery); 9636 9637 /* ACPI battery hooking */ 9638 9639 static int tpacpi_battery_add(struct power_supply *battery) 9640 { 9641 int batteryid = tpacpi_battery_get_id(battery->desc->name); 9642 9643 if (tpacpi_battery_probe(batteryid)) 9644 return -ENODEV; 9645 if (device_add_groups(&battery->dev, tpacpi_battery_groups)) 9646 return -ENODEV; 9647 return 0; 9648 } 9649 9650 static int tpacpi_battery_remove(struct power_supply *battery) 9651 { 9652 device_remove_groups(&battery->dev, tpacpi_battery_groups); 9653 return 0; 9654 } 9655 9656 static struct acpi_battery_hook battery_hook = { 9657 .add_battery = tpacpi_battery_add, 9658 .remove_battery = tpacpi_battery_remove, 9659 .name = "ThinkPad Battery Extension", 9660 }; 9661 9662 /* Subdriver init/exit */ 9663 9664 static const struct tpacpi_quirk battery_quirk_table[] __initconst = { 9665 /* 9666 * Individual addressing is broken on models that expose the 9667 * primary battery as BAT1. 9668 */ 9669 TPACPI_Q_LNV('J', '7', true), /* B5400 */ 9670 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */ 9671 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */ 9672 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */ 9673 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */ 9674 }; 9675 9676 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm) 9677 { 9678 memset(&battery_info, 0, sizeof(battery_info)); 9679 9680 tp_features.battery_force_primary = tpacpi_check_quirks( 9681 battery_quirk_table, 9682 ARRAY_SIZE(battery_quirk_table)); 9683 9684 battery_hook_register(&battery_hook); 9685 return 0; 9686 } 9687 9688 static void tpacpi_battery_exit(void) 9689 { 9690 battery_hook_unregister(&battery_hook); 9691 } 9692 9693 static struct ibm_struct battery_driver_data = { 9694 .name = "battery", 9695 .exit = tpacpi_battery_exit, 9696 }; 9697 9698 /************************************************************************* 9699 * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature 9700 */ 9701 9702 static int lcdshadow_state; 9703 9704 static int lcdshadow_on_off(bool state) 9705 { 9706 acpi_handle set_shadow_handle; 9707 int output; 9708 9709 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSSS", &set_shadow_handle))) { 9710 pr_warn("Thinkpad ACPI has no %s interface.\n", "SSSS"); 9711 return -EIO; 9712 } 9713 9714 if (!acpi_evalf(set_shadow_handle, &output, NULL, "dd", (int)state)) 9715 return -EIO; 9716 9717 lcdshadow_state = state; 9718 return 0; 9719 } 9720 9721 static int lcdshadow_set(bool on) 9722 { 9723 if (lcdshadow_state < 0) 9724 return lcdshadow_state; 9725 if (lcdshadow_state == on) 9726 return 0; 9727 return lcdshadow_on_off(on); 9728 } 9729 9730 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm) 9731 { 9732 acpi_handle get_shadow_handle; 9733 int output; 9734 9735 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSSS", &get_shadow_handle))) { 9736 lcdshadow_state = -ENODEV; 9737 return 0; 9738 } 9739 9740 if (!acpi_evalf(get_shadow_handle, &output, NULL, "dd", 0)) { 9741 lcdshadow_state = -EIO; 9742 return -EIO; 9743 } 9744 if (!(output & 0x10000)) { 9745 lcdshadow_state = -ENODEV; 9746 return 0; 9747 } 9748 lcdshadow_state = output & 0x1; 9749 9750 return 0; 9751 } 9752 9753 static void lcdshadow_resume(void) 9754 { 9755 if (lcdshadow_state >= 0) 9756 lcdshadow_on_off(lcdshadow_state); 9757 } 9758 9759 static int lcdshadow_read(struct seq_file *m) 9760 { 9761 if (lcdshadow_state < 0) { 9762 seq_puts(m, "status:\t\tnot supported\n"); 9763 } else { 9764 seq_printf(m, "status:\t\t%d\n", lcdshadow_state); 9765 seq_puts(m, "commands:\t0, 1\n"); 9766 } 9767 9768 return 0; 9769 } 9770 9771 static int lcdshadow_write(char *buf) 9772 { 9773 char *cmd; 9774 int res, state = -EINVAL; 9775 9776 if (lcdshadow_state < 0) 9777 return -ENODEV; 9778 9779 while ((cmd = strsep(&buf, ","))) { 9780 res = kstrtoint(cmd, 10, &state); 9781 if (res < 0) 9782 return res; 9783 } 9784 9785 if (state >= 2 || state < 0) 9786 return -EINVAL; 9787 9788 return lcdshadow_set(state); 9789 } 9790 9791 static struct ibm_struct lcdshadow_driver_data = { 9792 .name = "lcdshadow", 9793 .resume = lcdshadow_resume, 9794 .read = lcdshadow_read, 9795 .write = lcdshadow_write, 9796 }; 9797 9798 /**************************************************************************** 9799 **************************************************************************** 9800 * 9801 * Infrastructure 9802 * 9803 **************************************************************************** 9804 ****************************************************************************/ 9805 9806 /* 9807 * HKEY event callout for other subdrivers go here 9808 * (yes, it is ugly, but it is quick, safe, and gets the job done 9809 */ 9810 static void tpacpi_driver_event(const unsigned int hkey_event) 9811 { 9812 if (ibm_backlight_device) { 9813 switch (hkey_event) { 9814 case TP_HKEY_EV_BRGHT_UP: 9815 case TP_HKEY_EV_BRGHT_DOWN: 9816 tpacpi_brightness_notify_change(); 9817 } 9818 } 9819 if (alsa_card) { 9820 switch (hkey_event) { 9821 case TP_HKEY_EV_VOL_UP: 9822 case TP_HKEY_EV_VOL_DOWN: 9823 case TP_HKEY_EV_VOL_MUTE: 9824 volume_alsa_notify_change(); 9825 } 9826 } 9827 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) { 9828 enum led_brightness brightness; 9829 9830 mutex_lock(&kbdlight_mutex); 9831 9832 /* 9833 * Check the brightness actually changed, setting the brightness 9834 * through kbdlight_set_level() also triggers this event. 9835 */ 9836 brightness = kbdlight_sysfs_get(NULL); 9837 if (kbdlight_brightness != brightness) { 9838 kbdlight_brightness = brightness; 9839 led_classdev_notify_brightness_hw_changed( 9840 &tpacpi_led_kbdlight.led_classdev, brightness); 9841 } 9842 9843 mutex_unlock(&kbdlight_mutex); 9844 } 9845 } 9846 9847 static void hotkey_driver_event(const unsigned int scancode) 9848 { 9849 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9850 } 9851 9852 /* --------------------------------------------------------------------- */ 9853 9854 /* /proc support */ 9855 static struct proc_dir_entry *proc_dir; 9856 9857 /* 9858 * Module and infrastructure proble, init and exit handling 9859 */ 9860 9861 static bool force_load; 9862 9863 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9864 static const char * __init str_supported(int is_supported) 9865 { 9866 static char text_unsupported[] __initdata = "not supported"; 9867 9868 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9869 } 9870 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9871 9872 static void ibm_exit(struct ibm_struct *ibm) 9873 { 9874 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9875 9876 list_del_init(&ibm->all_drivers); 9877 9878 if (ibm->flags.acpi_notify_installed) { 9879 dbg_printk(TPACPI_DBG_EXIT, 9880 "%s: acpi_remove_notify_handler\n", ibm->name); 9881 BUG_ON(!ibm->acpi); 9882 acpi_remove_notify_handler(*ibm->acpi->handle, 9883 ibm->acpi->type, 9884 dispatch_acpi_notify); 9885 ibm->flags.acpi_notify_installed = 0; 9886 } 9887 9888 if (ibm->flags.proc_created) { 9889 dbg_printk(TPACPI_DBG_EXIT, 9890 "%s: remove_proc_entry\n", ibm->name); 9891 remove_proc_entry(ibm->name, proc_dir); 9892 ibm->flags.proc_created = 0; 9893 } 9894 9895 if (ibm->flags.acpi_driver_registered) { 9896 dbg_printk(TPACPI_DBG_EXIT, 9897 "%s: acpi_bus_unregister_driver\n", ibm->name); 9898 BUG_ON(!ibm->acpi); 9899 acpi_bus_unregister_driver(ibm->acpi->driver); 9900 kfree(ibm->acpi->driver); 9901 ibm->acpi->driver = NULL; 9902 ibm->flags.acpi_driver_registered = 0; 9903 } 9904 9905 if (ibm->flags.init_called && ibm->exit) { 9906 ibm->exit(); 9907 ibm->flags.init_called = 0; 9908 } 9909 9910 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9911 } 9912 9913 static int __init ibm_init(struct ibm_init_struct *iibm) 9914 { 9915 int ret; 9916 struct ibm_struct *ibm = iibm->data; 9917 struct proc_dir_entry *entry; 9918 9919 BUG_ON(ibm == NULL); 9920 9921 INIT_LIST_HEAD(&ibm->all_drivers); 9922 9923 if (ibm->flags.experimental && !experimental) 9924 return 0; 9925 9926 dbg_printk(TPACPI_DBG_INIT, 9927 "probing for %s\n", ibm->name); 9928 9929 if (iibm->init) { 9930 ret = iibm->init(iibm); 9931 if (ret > 0) 9932 return 0; /* probe failed */ 9933 if (ret) 9934 return ret; 9935 9936 ibm->flags.init_called = 1; 9937 } 9938 9939 if (ibm->acpi) { 9940 if (ibm->acpi->hid) { 9941 ret = register_tpacpi_subdriver(ibm); 9942 if (ret) 9943 goto err_out; 9944 } 9945 9946 if (ibm->acpi->notify) { 9947 ret = setup_acpi_notify(ibm); 9948 if (ret == -ENODEV) { 9949 pr_notice("disabling subdriver %s\n", 9950 ibm->name); 9951 ret = 0; 9952 goto err_out; 9953 } 9954 if (ret < 0) 9955 goto err_out; 9956 } 9957 } 9958 9959 dbg_printk(TPACPI_DBG_INIT, 9960 "%s installed\n", ibm->name); 9961 9962 if (ibm->read) { 9963 umode_t mode = iibm->base_procfs_mode; 9964 9965 if (!mode) 9966 mode = S_IRUGO; 9967 if (ibm->write) 9968 mode |= S_IWUSR; 9969 entry = proc_create_data(ibm->name, mode, proc_dir, 9970 &dispatch_proc_ops, ibm); 9971 if (!entry) { 9972 pr_err("unable to create proc entry %s\n", ibm->name); 9973 ret = -ENODEV; 9974 goto err_out; 9975 } 9976 ibm->flags.proc_created = 1; 9977 } 9978 9979 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9980 9981 return 0; 9982 9983 err_out: 9984 dbg_printk(TPACPI_DBG_INIT, 9985 "%s: at error exit path with result %d\n", 9986 ibm->name, ret); 9987 9988 ibm_exit(ibm); 9989 return (ret < 0) ? ret : 0; 9990 } 9991 9992 /* Probing */ 9993 9994 static char __init tpacpi_parse_fw_id(const char * const s, 9995 u32 *model, u16 *release) 9996 { 9997 int i; 9998 9999 if (!s || strlen(s) < 8) 10000 goto invalid; 10001 10002 for (i = 0; i < 8; i++) 10003 if (!((s[i] >= '0' && s[i] <= '9') || 10004 (s[i] >= 'A' && s[i] <= 'Z'))) 10005 goto invalid; 10006 10007 /* 10008 * Most models: xxyTkkWW (#.##c) 10009 * Ancient 570/600 and -SL lacks (#.##c) 10010 */ 10011 if (s[3] == 'T' || s[3] == 'N') { 10012 *model = TPID(s[0], s[1]); 10013 *release = TPVER(s[4], s[5]); 10014 return s[2]; 10015 10016 /* New models: xxxyTkkW (#.##c); T550 and some others */ 10017 } else if (s[4] == 'T' || s[4] == 'N') { 10018 *model = TPID3(s[0], s[1], s[2]); 10019 *release = TPVER(s[5], s[6]); 10020 return s[3]; 10021 } 10022 10023 invalid: 10024 return '\0'; 10025 } 10026 10027 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private) 10028 { 10029 char *ec_fw_string = (char *) private; 10030 const char *dmi_data = (const char *)dm; 10031 /* 10032 * ThinkPad Embedded Controller Program Table on newer models 10033 * 10034 * Offset | Name | Width | Description 10035 * ---------------------------------------------------- 10036 * 0x00 | Type | BYTE | 0x8C 10037 * 0x01 | Length | BYTE | 10038 * 0x02 | Handle | WORD | Varies 10039 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO" 10040 * 0x0A | OEM struct offset | BYTE | 0x0B 10041 * 0x0B | OEM struct number | BYTE | 0x07, for this structure 10042 * 0x0C | OEM struct revision | BYTE | 0x01, for this format 10043 * 0x0D | ECP version ID | STR ID | 10044 * 0x0E | ECP release date | STR ID | 10045 */ 10046 10047 /* Return if data structure not match */ 10048 if (dm->type != 140 || dm->length < 0x0F || 10049 memcmp(dmi_data + 4, "LENOVO", 6) != 0 || 10050 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 || 10051 dmi_data[0x0C] != 0x01) 10052 return; 10053 10054 /* fwstr is the first 8byte string */ 10055 strncpy(ec_fw_string, dmi_data + 0x0F, 8); 10056 } 10057 10058 /* returns 0 - probe ok, or < 0 - probe error. 10059 * Probe ok doesn't mean thinkpad found. 10060 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 10061 static int __must_check __init get_thinkpad_model_data( 10062 struct thinkpad_id_data *tp) 10063 { 10064 const struct dmi_device *dev = NULL; 10065 char ec_fw_string[18] = {0}; 10066 char const *s; 10067 char t; 10068 10069 if (!tp) 10070 return -EINVAL; 10071 10072 memset(tp, 0, sizeof(*tp)); 10073 10074 if (dmi_name_in_vendors("IBM")) 10075 tp->vendor = PCI_VENDOR_ID_IBM; 10076 else if (dmi_name_in_vendors("LENOVO")) 10077 tp->vendor = PCI_VENDOR_ID_LENOVO; 10078 else 10079 return 0; 10080 10081 s = dmi_get_system_info(DMI_BIOS_VERSION); 10082 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 10083 if (s && !tp->bios_version_str) 10084 return -ENOMEM; 10085 10086 /* Really ancient ThinkPad 240X will fail this, which is fine */ 10087 t = tpacpi_parse_fw_id(tp->bios_version_str, 10088 &tp->bios_model, &tp->bios_release); 10089 if (t != 'E' && t != 'C') 10090 return 0; 10091 10092 /* 10093 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 10094 * X32 or newer, all Z series; Some models must have an 10095 * up-to-date BIOS or they will not be detected. 10096 * 10097 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10098 */ 10099 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 10100 if (sscanf(dev->name, 10101 "IBM ThinkPad Embedded Controller -[%17c", 10102 ec_fw_string) == 1) { 10103 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 10104 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 10105 break; 10106 } 10107 } 10108 10109 /* Newer ThinkPads have different EC program info table */ 10110 if (!ec_fw_string[0]) 10111 dmi_walk(find_new_ec_fwstr, &ec_fw_string); 10112 10113 if (ec_fw_string[0]) { 10114 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 10115 if (!tp->ec_version_str) 10116 return -ENOMEM; 10117 10118 t = tpacpi_parse_fw_id(ec_fw_string, 10119 &tp->ec_model, &tp->ec_release); 10120 if (t != 'H') { 10121 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n", 10122 ec_fw_string); 10123 pr_notice("please report this to %s\n", TPACPI_MAIL); 10124 } 10125 } 10126 10127 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 10128 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 10129 tp->model_str = kstrdup(s, GFP_KERNEL); 10130 if (!tp->model_str) 10131 return -ENOMEM; 10132 } else { 10133 s = dmi_get_system_info(DMI_BIOS_VENDOR); 10134 if (s && !(strncasecmp(s, "Lenovo", 6))) { 10135 tp->model_str = kstrdup(s, GFP_KERNEL); 10136 if (!tp->model_str) 10137 return -ENOMEM; 10138 } 10139 } 10140 10141 s = dmi_get_system_info(DMI_PRODUCT_NAME); 10142 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 10143 if (s && !tp->nummodel_str) 10144 return -ENOMEM; 10145 10146 return 0; 10147 } 10148 10149 static int __init probe_for_thinkpad(void) 10150 { 10151 int is_thinkpad; 10152 10153 if (acpi_disabled) 10154 return -ENODEV; 10155 10156 /* It would be dangerous to run the driver in this case */ 10157 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 10158 return -ENODEV; 10159 10160 /* 10161 * Non-ancient models have better DMI tagging, but very old models 10162 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 10163 */ 10164 is_thinkpad = (thinkpad_id.model_str != NULL) || 10165 (thinkpad_id.ec_model != 0) || 10166 tpacpi_is_fw_known(); 10167 10168 /* The EC handler is required */ 10169 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 10170 if (!ec_handle) { 10171 if (is_thinkpad) 10172 pr_err("Not yet supported ThinkPad detected!\n"); 10173 return -ENODEV; 10174 } 10175 10176 if (!is_thinkpad && !force_load) 10177 return -ENODEV; 10178 10179 return 0; 10180 } 10181 10182 static void __init thinkpad_acpi_init_banner(void) 10183 { 10184 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 10185 pr_info("%s\n", TPACPI_URL); 10186 10187 pr_info("ThinkPad BIOS %s, EC %s\n", 10188 (thinkpad_id.bios_version_str) ? 10189 thinkpad_id.bios_version_str : "unknown", 10190 (thinkpad_id.ec_version_str) ? 10191 thinkpad_id.ec_version_str : "unknown"); 10192 10193 BUG_ON(!thinkpad_id.vendor); 10194 10195 if (thinkpad_id.model_str) 10196 pr_info("%s %s, model %s\n", 10197 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 10198 "IBM" : ((thinkpad_id.vendor == 10199 PCI_VENDOR_ID_LENOVO) ? 10200 "Lenovo" : "Unknown vendor"), 10201 thinkpad_id.model_str, 10202 (thinkpad_id.nummodel_str) ? 10203 thinkpad_id.nummodel_str : "unknown"); 10204 } 10205 10206 /* Module init, exit, parameters */ 10207 10208 static struct ibm_init_struct ibms_init[] __initdata = { 10209 { 10210 .data = &thinkpad_acpi_driver_data, 10211 }, 10212 { 10213 .init = hotkey_init, 10214 .data = &hotkey_driver_data, 10215 }, 10216 { 10217 .init = bluetooth_init, 10218 .data = &bluetooth_driver_data, 10219 }, 10220 { 10221 .init = wan_init, 10222 .data = &wan_driver_data, 10223 }, 10224 { 10225 .init = uwb_init, 10226 .data = &uwb_driver_data, 10227 }, 10228 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 10229 { 10230 .init = video_init, 10231 .base_procfs_mode = S_IRUSR, 10232 .data = &video_driver_data, 10233 }, 10234 #endif 10235 { 10236 .init = kbdlight_init, 10237 .data = &kbdlight_driver_data, 10238 }, 10239 { 10240 .init = light_init, 10241 .data = &light_driver_data, 10242 }, 10243 { 10244 .init = cmos_init, 10245 .data = &cmos_driver_data, 10246 }, 10247 { 10248 .init = led_init, 10249 .data = &led_driver_data, 10250 }, 10251 { 10252 .init = beep_init, 10253 .data = &beep_driver_data, 10254 }, 10255 { 10256 .init = thermal_init, 10257 .data = &thermal_driver_data, 10258 }, 10259 { 10260 .init = brightness_init, 10261 .data = &brightness_driver_data, 10262 }, 10263 { 10264 .init = volume_init, 10265 .data = &volume_driver_data, 10266 }, 10267 { 10268 .init = fan_init, 10269 .data = &fan_driver_data, 10270 }, 10271 { 10272 .init = mute_led_init, 10273 .data = &mute_led_driver_data, 10274 }, 10275 { 10276 .init = tpacpi_battery_init, 10277 .data = &battery_driver_data, 10278 }, 10279 { 10280 .init = tpacpi_lcdshadow_init, 10281 .data = &lcdshadow_driver_data, 10282 }, 10283 }; 10284 10285 static int __init set_ibm_param(const char *val, const struct kernel_param *kp) 10286 { 10287 unsigned int i; 10288 struct ibm_struct *ibm; 10289 10290 if (!kp || !kp->name || !val) 10291 return -EINVAL; 10292 10293 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10294 ibm = ibms_init[i].data; 10295 WARN_ON(ibm == NULL); 10296 10297 if (!ibm || !ibm->name) 10298 continue; 10299 10300 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 10301 if (strlen(val) > sizeof(ibms_init[i].param) - 1) 10302 return -ENOSPC; 10303 strcpy(ibms_init[i].param, val); 10304 return 0; 10305 } 10306 } 10307 10308 return -EINVAL; 10309 } 10310 10311 module_param(experimental, int, 0444); 10312 MODULE_PARM_DESC(experimental, 10313 "Enables experimental features when non-zero"); 10314 10315 module_param_named(debug, dbg_level, uint, 0); 10316 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 10317 10318 module_param(force_load, bool, 0444); 10319 MODULE_PARM_DESC(force_load, 10320 "Attempts to load the driver even on a mis-identified ThinkPad when true"); 10321 10322 module_param_named(fan_control, fan_control_allowed, bool, 0444); 10323 MODULE_PARM_DESC(fan_control, 10324 "Enables setting fan parameters features when true"); 10325 10326 module_param_named(brightness_mode, brightness_mode, uint, 0444); 10327 MODULE_PARM_DESC(brightness_mode, 10328 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 10329 10330 module_param(brightness_enable, uint, 0444); 10331 MODULE_PARM_DESC(brightness_enable, 10332 "Enables backlight control when 1, disables when 0"); 10333 10334 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 10335 module_param_named(volume_mode, volume_mode, uint, 0444); 10336 MODULE_PARM_DESC(volume_mode, 10337 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 10338 10339 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 10340 MODULE_PARM_DESC(volume_capabilities, 10341 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only"); 10342 10343 module_param_named(volume_control, volume_control_allowed, bool, 0444); 10344 MODULE_PARM_DESC(volume_control, 10345 "Enables software override for the console audio control when true"); 10346 10347 module_param_named(software_mute, software_mute_requested, bool, 0444); 10348 MODULE_PARM_DESC(software_mute, 10349 "Request full software mute control"); 10350 10351 /* ALSA module API parameters */ 10352 module_param_named(index, alsa_index, int, 0444); 10353 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 10354 module_param_named(id, alsa_id, charp, 0444); 10355 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 10356 module_param_named(enable, alsa_enable, bool, 0444); 10357 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 10358 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 10359 10360 /* The module parameter can't be read back, that's why 0 is used here */ 10361 #define TPACPI_PARAM(feature) \ 10362 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 10363 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation") 10364 10365 TPACPI_PARAM(hotkey); 10366 TPACPI_PARAM(bluetooth); 10367 TPACPI_PARAM(video); 10368 TPACPI_PARAM(light); 10369 TPACPI_PARAM(cmos); 10370 TPACPI_PARAM(led); 10371 TPACPI_PARAM(beep); 10372 TPACPI_PARAM(brightness); 10373 TPACPI_PARAM(volume); 10374 TPACPI_PARAM(fan); 10375 10376 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10377 module_param(dbg_wlswemul, uint, 0444); 10378 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 10379 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 10380 MODULE_PARM_DESC(wlsw_state, 10381 "Initial state of the emulated WLSW switch"); 10382 10383 module_param(dbg_bluetoothemul, uint, 0444); 10384 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 10385 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 10386 MODULE_PARM_DESC(bluetooth_state, 10387 "Initial state of the emulated bluetooth switch"); 10388 10389 module_param(dbg_wwanemul, uint, 0444); 10390 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 10391 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 10392 MODULE_PARM_DESC(wwan_state, 10393 "Initial state of the emulated WWAN switch"); 10394 10395 module_param(dbg_uwbemul, uint, 0444); 10396 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 10397 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 10398 MODULE_PARM_DESC(uwb_state, 10399 "Initial state of the emulated UWB switch"); 10400 #endif 10401 10402 static void thinkpad_acpi_module_exit(void) 10403 { 10404 struct ibm_struct *ibm, *itmp; 10405 10406 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 10407 10408 list_for_each_entry_safe_reverse(ibm, itmp, 10409 &tpacpi_all_drivers, 10410 all_drivers) { 10411 ibm_exit(ibm); 10412 } 10413 10414 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 10415 10416 if (tpacpi_inputdev) { 10417 if (tp_features.input_device_registered) 10418 input_unregister_device(tpacpi_inputdev); 10419 else 10420 input_free_device(tpacpi_inputdev); 10421 kfree(hotkey_keycode_map); 10422 } 10423 10424 if (tpacpi_hwmon) 10425 hwmon_device_unregister(tpacpi_hwmon); 10426 10427 if (tpacpi_sensors_pdev) 10428 platform_device_unregister(tpacpi_sensors_pdev); 10429 if (tpacpi_pdev) 10430 platform_device_unregister(tpacpi_pdev); 10431 10432 if (tp_features.sensors_pdrv_attrs_registered) 10433 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 10434 if (tp_features.platform_drv_attrs_registered) 10435 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 10436 10437 if (tp_features.sensors_pdrv_registered) 10438 platform_driver_unregister(&tpacpi_hwmon_pdriver); 10439 10440 if (tp_features.platform_drv_registered) 10441 platform_driver_unregister(&tpacpi_pdriver); 10442 10443 if (proc_dir) 10444 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 10445 10446 if (tpacpi_wq) 10447 destroy_workqueue(tpacpi_wq); 10448 10449 kfree(thinkpad_id.bios_version_str); 10450 kfree(thinkpad_id.ec_version_str); 10451 kfree(thinkpad_id.model_str); 10452 kfree(thinkpad_id.nummodel_str); 10453 } 10454 10455 10456 static int __init thinkpad_acpi_module_init(void) 10457 { 10458 int ret, i; 10459 10460 tpacpi_lifecycle = TPACPI_LIFE_INIT; 10461 10462 /* Driver-level probe */ 10463 10464 ret = get_thinkpad_model_data(&thinkpad_id); 10465 if (ret) { 10466 pr_err("unable to get DMI data: %d\n", ret); 10467 thinkpad_acpi_module_exit(); 10468 return ret; 10469 } 10470 ret = probe_for_thinkpad(); 10471 if (ret) { 10472 thinkpad_acpi_module_exit(); 10473 return ret; 10474 } 10475 10476 /* Driver initialization */ 10477 10478 thinkpad_acpi_init_banner(); 10479 tpacpi_check_outdated_fw(); 10480 10481 TPACPI_ACPIHANDLE_INIT(ecrd); 10482 TPACPI_ACPIHANDLE_INIT(ecwr); 10483 10484 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 10485 if (!tpacpi_wq) { 10486 thinkpad_acpi_module_exit(); 10487 return -ENOMEM; 10488 } 10489 10490 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 10491 if (!proc_dir) { 10492 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 10493 thinkpad_acpi_module_exit(); 10494 return -ENODEV; 10495 } 10496 10497 ret = platform_driver_register(&tpacpi_pdriver); 10498 if (ret) { 10499 pr_err("unable to register main platform driver\n"); 10500 thinkpad_acpi_module_exit(); 10501 return ret; 10502 } 10503 tp_features.platform_drv_registered = 1; 10504 10505 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 10506 if (ret) { 10507 pr_err("unable to register hwmon platform driver\n"); 10508 thinkpad_acpi_module_exit(); 10509 return ret; 10510 } 10511 tp_features.sensors_pdrv_registered = 1; 10512 10513 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 10514 if (!ret) { 10515 tp_features.platform_drv_attrs_registered = 1; 10516 ret = tpacpi_create_driver_attributes( 10517 &tpacpi_hwmon_pdriver.driver); 10518 } 10519 if (ret) { 10520 pr_err("unable to create sysfs driver attributes\n"); 10521 thinkpad_acpi_module_exit(); 10522 return ret; 10523 } 10524 tp_features.sensors_pdrv_attrs_registered = 1; 10525 10526 10527 /* Device initialization */ 10528 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 10529 NULL, 0); 10530 if (IS_ERR(tpacpi_pdev)) { 10531 ret = PTR_ERR(tpacpi_pdev); 10532 tpacpi_pdev = NULL; 10533 pr_err("unable to register platform device\n"); 10534 thinkpad_acpi_module_exit(); 10535 return ret; 10536 } 10537 tpacpi_sensors_pdev = platform_device_register_simple( 10538 TPACPI_HWMON_DRVR_NAME, 10539 -1, NULL, 0); 10540 if (IS_ERR(tpacpi_sensors_pdev)) { 10541 ret = PTR_ERR(tpacpi_sensors_pdev); 10542 tpacpi_sensors_pdev = NULL; 10543 pr_err("unable to register hwmon platform device\n"); 10544 thinkpad_acpi_module_exit(); 10545 return ret; 10546 } 10547 tp_features.sensors_pdev_attrs_registered = 1; 10548 tpacpi_hwmon = hwmon_device_register_with_groups( 10549 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL); 10550 10551 if (IS_ERR(tpacpi_hwmon)) { 10552 ret = PTR_ERR(tpacpi_hwmon); 10553 tpacpi_hwmon = NULL; 10554 pr_err("unable to register hwmon device\n"); 10555 thinkpad_acpi_module_exit(); 10556 return ret; 10557 } 10558 mutex_init(&tpacpi_inputdev_send_mutex); 10559 tpacpi_inputdev = input_allocate_device(); 10560 if (!tpacpi_inputdev) { 10561 thinkpad_acpi_module_exit(); 10562 return -ENOMEM; 10563 } else { 10564 /* Prepare input device, but don't register */ 10565 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 10566 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 10567 tpacpi_inputdev->id.bustype = BUS_HOST; 10568 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 10569 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 10570 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 10571 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 10572 } 10573 10574 /* Init subdriver dependencies */ 10575 tpacpi_detect_brightness_capabilities(); 10576 10577 /* Init subdrivers */ 10578 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10579 ret = ibm_init(&ibms_init[i]); 10580 if (ret >= 0 && *ibms_init[i].param) 10581 ret = ibms_init[i].data->write(ibms_init[i].param); 10582 if (ret < 0) { 10583 thinkpad_acpi_module_exit(); 10584 return ret; 10585 } 10586 } 10587 10588 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 10589 10590 ret = input_register_device(tpacpi_inputdev); 10591 if (ret < 0) { 10592 pr_err("unable to register input device\n"); 10593 thinkpad_acpi_module_exit(); 10594 return ret; 10595 } else { 10596 tp_features.input_device_registered = 1; 10597 } 10598 10599 return 0; 10600 } 10601 10602 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 10603 10604 /* 10605 * This will autoload the driver in almost every ThinkPad 10606 * in widespread use. 10607 * 10608 * Only _VERY_ old models, like the 240, 240x and 570 lack 10609 * the HKEY event interface. 10610 */ 10611 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 10612 10613 /* 10614 * DMI matching for module autoloading 10615 * 10616 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10617 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 10618 * 10619 * Only models listed in thinkwiki will be supported, so add yours 10620 * if it is not there yet. 10621 */ 10622 #define IBM_BIOS_MODULE_ALIAS(__type) \ 10623 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 10624 10625 /* Ancient thinkpad BIOSes have to be identified by 10626 * BIOS type or model number, and there are far less 10627 * BIOS types than model numbers... */ 10628 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 10629 10630 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 10631 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 10632 MODULE_DESCRIPTION(TPACPI_DESC); 10633 MODULE_VERSION(TPACPI_VERSION); 10634 MODULE_LICENSE("GPL"); 10635 10636 module_init(thinkpad_acpi_module_init); 10637 module_exit(thinkpad_acpi_module_exit); 10638