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 if (count > PAGE_SIZE - 1) 889 return -EINVAL; 890 891 kernbuf = kmalloc(count + 1, GFP_KERNEL); 892 if (!kernbuf) 893 return -ENOMEM; 894 895 if (copy_from_user(kernbuf, userbuf, count)) { 896 kfree(kernbuf); 897 return -EFAULT; 898 } 899 900 kernbuf[count] = 0; 901 ret = ibm->write(kernbuf); 902 if (ret == 0) 903 ret = count; 904 905 kfree(kernbuf); 906 907 return ret; 908 } 909 910 static const struct proc_ops dispatch_proc_ops = { 911 .proc_open = dispatch_proc_open, 912 .proc_read = seq_read, 913 .proc_lseek = seq_lseek, 914 .proc_release = single_release, 915 .proc_write = dispatch_proc_write, 916 }; 917 918 /**************************************************************************** 919 **************************************************************************** 920 * 921 * Device model: input, hwmon and platform 922 * 923 **************************************************************************** 924 ****************************************************************************/ 925 926 static struct platform_device *tpacpi_pdev; 927 static struct platform_device *tpacpi_sensors_pdev; 928 static struct device *tpacpi_hwmon; 929 static struct input_dev *tpacpi_inputdev; 930 static struct mutex tpacpi_inputdev_send_mutex; 931 static LIST_HEAD(tpacpi_all_drivers); 932 933 #ifdef CONFIG_PM_SLEEP 934 static int tpacpi_suspend_handler(struct device *dev) 935 { 936 struct ibm_struct *ibm, *itmp; 937 938 list_for_each_entry_safe(ibm, itmp, 939 &tpacpi_all_drivers, 940 all_drivers) { 941 if (ibm->suspend) 942 (ibm->suspend)(); 943 } 944 945 return 0; 946 } 947 948 static int tpacpi_resume_handler(struct device *dev) 949 { 950 struct ibm_struct *ibm, *itmp; 951 952 list_for_each_entry_safe(ibm, itmp, 953 &tpacpi_all_drivers, 954 all_drivers) { 955 if (ibm->resume) 956 (ibm->resume)(); 957 } 958 959 return 0; 960 } 961 #endif 962 963 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 964 tpacpi_suspend_handler, tpacpi_resume_handler); 965 966 static void tpacpi_shutdown_handler(struct platform_device *pdev) 967 { 968 struct ibm_struct *ibm, *itmp; 969 970 list_for_each_entry_safe(ibm, itmp, 971 &tpacpi_all_drivers, 972 all_drivers) { 973 if (ibm->shutdown) 974 (ibm->shutdown)(); 975 } 976 } 977 978 static struct platform_driver tpacpi_pdriver = { 979 .driver = { 980 .name = TPACPI_DRVR_NAME, 981 .pm = &tpacpi_pm, 982 }, 983 .shutdown = tpacpi_shutdown_handler, 984 }; 985 986 static struct platform_driver tpacpi_hwmon_pdriver = { 987 .driver = { 988 .name = TPACPI_HWMON_DRVR_NAME, 989 }, 990 }; 991 992 /************************************************************************* 993 * sysfs support helpers 994 */ 995 996 struct attribute_set { 997 unsigned int members, max_members; 998 struct attribute_group group; 999 }; 1000 1001 struct attribute_set_obj { 1002 struct attribute_set s; 1003 struct attribute *a; 1004 } __attribute__((packed)); 1005 1006 static struct attribute_set *create_attr_set(unsigned int max_members, 1007 const char *name) 1008 { 1009 struct attribute_set_obj *sobj; 1010 1011 if (max_members == 0) 1012 return NULL; 1013 1014 /* Allocates space for implicit NULL at the end too */ 1015 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1016 max_members * sizeof(struct attribute *), 1017 GFP_KERNEL); 1018 if (!sobj) 1019 return NULL; 1020 sobj->s.max_members = max_members; 1021 sobj->s.group.attrs = &sobj->a; 1022 sobj->s.group.name = name; 1023 1024 return &sobj->s; 1025 } 1026 1027 #define destroy_attr_set(_set) \ 1028 kfree(_set); 1029 1030 /* not multi-threaded safe, use it in a single thread per set */ 1031 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1032 { 1033 if (!s || !attr) 1034 return -EINVAL; 1035 1036 if (s->members >= s->max_members) 1037 return -ENOMEM; 1038 1039 s->group.attrs[s->members] = attr; 1040 s->members++; 1041 1042 return 0; 1043 } 1044 1045 static int add_many_to_attr_set(struct attribute_set *s, 1046 struct attribute **attr, 1047 unsigned int count) 1048 { 1049 int i, res; 1050 1051 for (i = 0; i < count; i++) { 1052 res = add_to_attr_set(s, attr[i]); 1053 if (res) 1054 return res; 1055 } 1056 1057 return 0; 1058 } 1059 1060 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1061 { 1062 sysfs_remove_group(kobj, &s->group); 1063 destroy_attr_set(s); 1064 } 1065 1066 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1067 sysfs_create_group(_kobj, &_attr_set->group) 1068 1069 static int parse_strtoul(const char *buf, 1070 unsigned long max, unsigned long *value) 1071 { 1072 char *endp; 1073 1074 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1075 endp = skip_spaces(endp); 1076 if (*endp || *value > max) 1077 return -EINVAL; 1078 1079 return 0; 1080 } 1081 1082 static void tpacpi_disable_brightness_delay(void) 1083 { 1084 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1085 pr_notice("ACPI backlight control delay disabled\n"); 1086 } 1087 1088 static void printk_deprecated_attribute(const char * const what, 1089 const char * const details) 1090 { 1091 tpacpi_log_usertask("deprecated sysfs attribute"); 1092 pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n", 1093 what, details); 1094 } 1095 1096 /************************************************************************* 1097 * rfkill and radio control support helpers 1098 */ 1099 1100 /* 1101 * ThinkPad-ACPI firmware handling model: 1102 * 1103 * WLSW (master wireless switch) is event-driven, and is common to all 1104 * firmware-controlled radios. It cannot be controlled, just monitored, 1105 * as expected. It overrides all radio state in firmware 1106 * 1107 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1108 * (TODO: verify how WLSW interacts with the returned radio state). 1109 * 1110 * The only time there are shadow radio state changes, is when 1111 * masked-off hotkeys are used. 1112 */ 1113 1114 /* 1115 * Internal driver API for radio state: 1116 * 1117 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1118 * bool: true means radio blocked (off) 1119 */ 1120 enum tpacpi_rfkill_state { 1121 TPACPI_RFK_RADIO_OFF = 0, 1122 TPACPI_RFK_RADIO_ON 1123 }; 1124 1125 /* rfkill switches */ 1126 enum tpacpi_rfk_id { 1127 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1128 TPACPI_RFK_WWAN_SW_ID, 1129 TPACPI_RFK_UWB_SW_ID, 1130 TPACPI_RFK_SW_MAX 1131 }; 1132 1133 static const char *tpacpi_rfkill_names[] = { 1134 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1135 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1136 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1137 [TPACPI_RFK_SW_MAX] = NULL 1138 }; 1139 1140 /* ThinkPad-ACPI rfkill subdriver */ 1141 struct tpacpi_rfk { 1142 struct rfkill *rfkill; 1143 enum tpacpi_rfk_id id; 1144 const struct tpacpi_rfk_ops *ops; 1145 }; 1146 1147 struct tpacpi_rfk_ops { 1148 /* firmware interface */ 1149 int (*get_status)(void); 1150 int (*set_status)(const enum tpacpi_rfkill_state); 1151 }; 1152 1153 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1154 1155 /* Query FW and update rfkill sw state for a given rfkill switch */ 1156 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1157 { 1158 int status; 1159 1160 if (!tp_rfk) 1161 return -ENODEV; 1162 1163 status = (tp_rfk->ops->get_status)(); 1164 if (status < 0) 1165 return status; 1166 1167 rfkill_set_sw_state(tp_rfk->rfkill, 1168 (status == TPACPI_RFK_RADIO_OFF)); 1169 1170 return status; 1171 } 1172 1173 /* Query FW and update rfkill sw state for all rfkill switches */ 1174 static void tpacpi_rfk_update_swstate_all(void) 1175 { 1176 unsigned int i; 1177 1178 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1179 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1180 } 1181 1182 /* 1183 * Sync the HW-blocking state of all rfkill switches, 1184 * do notice it causes the rfkill core to schedule uevents 1185 */ 1186 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1187 { 1188 unsigned int i; 1189 struct tpacpi_rfk *tp_rfk; 1190 1191 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1192 tp_rfk = tpacpi_rfkill_switches[i]; 1193 if (tp_rfk) { 1194 if (rfkill_set_hw_state(tp_rfk->rfkill, 1195 blocked)) { 1196 /* ignore -- we track sw block */ 1197 } 1198 } 1199 } 1200 } 1201 1202 /* Call to get the WLSW state from the firmware */ 1203 static int hotkey_get_wlsw(void); 1204 1205 /* Call to query WLSW state and update all rfkill switches */ 1206 static bool tpacpi_rfk_check_hwblock_state(void) 1207 { 1208 int res = hotkey_get_wlsw(); 1209 int hw_blocked; 1210 1211 /* When unknown or unsupported, we have to assume it is unblocked */ 1212 if (res < 0) 1213 return false; 1214 1215 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1216 tpacpi_rfk_update_hwblock_state(hw_blocked); 1217 1218 return hw_blocked; 1219 } 1220 1221 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1222 { 1223 struct tpacpi_rfk *tp_rfk = data; 1224 int res; 1225 1226 dbg_printk(TPACPI_DBG_RFKILL, 1227 "request to change radio state to %s\n", 1228 blocked ? "blocked" : "unblocked"); 1229 1230 /* try to set radio state */ 1231 res = (tp_rfk->ops->set_status)(blocked ? 1232 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1233 1234 /* and update the rfkill core with whatever the FW really did */ 1235 tpacpi_rfk_update_swstate(tp_rfk); 1236 1237 return (res < 0) ? res : 0; 1238 } 1239 1240 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1241 .set_block = tpacpi_rfk_hook_set_block, 1242 }; 1243 1244 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1245 const struct tpacpi_rfk_ops *tp_rfkops, 1246 const enum rfkill_type rfktype, 1247 const char *name, 1248 const bool set_default) 1249 { 1250 struct tpacpi_rfk *atp_rfk; 1251 int res; 1252 bool sw_state = false; 1253 bool hw_state; 1254 int sw_status; 1255 1256 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1257 1258 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1259 if (atp_rfk) 1260 atp_rfk->rfkill = rfkill_alloc(name, 1261 &tpacpi_pdev->dev, 1262 rfktype, 1263 &tpacpi_rfk_rfkill_ops, 1264 atp_rfk); 1265 if (!atp_rfk || !atp_rfk->rfkill) { 1266 pr_err("failed to allocate memory for rfkill class\n"); 1267 kfree(atp_rfk); 1268 return -ENOMEM; 1269 } 1270 1271 atp_rfk->id = id; 1272 atp_rfk->ops = tp_rfkops; 1273 1274 sw_status = (tp_rfkops->get_status)(); 1275 if (sw_status < 0) { 1276 pr_err("failed to read initial state for %s, error %d\n", 1277 name, sw_status); 1278 } else { 1279 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1280 if (set_default) { 1281 /* try to keep the initial state, since we ask the 1282 * firmware to preserve it across S5 in NVRAM */ 1283 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1284 } 1285 } 1286 hw_state = tpacpi_rfk_check_hwblock_state(); 1287 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1288 1289 res = rfkill_register(atp_rfk->rfkill); 1290 if (res < 0) { 1291 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1292 rfkill_destroy(atp_rfk->rfkill); 1293 kfree(atp_rfk); 1294 return res; 1295 } 1296 1297 tpacpi_rfkill_switches[id] = atp_rfk; 1298 1299 pr_info("rfkill switch %s: radio is %sblocked\n", 1300 name, (sw_state || hw_state) ? "" : "un"); 1301 return 0; 1302 } 1303 1304 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1305 { 1306 struct tpacpi_rfk *tp_rfk; 1307 1308 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1309 1310 tp_rfk = tpacpi_rfkill_switches[id]; 1311 if (tp_rfk) { 1312 rfkill_unregister(tp_rfk->rfkill); 1313 rfkill_destroy(tp_rfk->rfkill); 1314 tpacpi_rfkill_switches[id] = NULL; 1315 kfree(tp_rfk); 1316 } 1317 } 1318 1319 static void printk_deprecated_rfkill_attribute(const char * const what) 1320 { 1321 printk_deprecated_attribute(what, 1322 "Please switch to generic rfkill before year 2010"); 1323 } 1324 1325 /* sysfs <radio> enable ------------------------------------------------ */ 1326 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1327 struct device_attribute *attr, 1328 char *buf) 1329 { 1330 int status; 1331 1332 printk_deprecated_rfkill_attribute(attr->attr.name); 1333 1334 /* This is in the ABI... */ 1335 if (tpacpi_rfk_check_hwblock_state()) { 1336 status = TPACPI_RFK_RADIO_OFF; 1337 } else { 1338 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1339 if (status < 0) 1340 return status; 1341 } 1342 1343 return snprintf(buf, PAGE_SIZE, "%d\n", 1344 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1345 } 1346 1347 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1348 struct device_attribute *attr, 1349 const char *buf, size_t count) 1350 { 1351 unsigned long t; 1352 int res; 1353 1354 printk_deprecated_rfkill_attribute(attr->attr.name); 1355 1356 if (parse_strtoul(buf, 1, &t)) 1357 return -EINVAL; 1358 1359 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1360 1361 /* This is in the ABI... */ 1362 if (tpacpi_rfk_check_hwblock_state() && !!t) 1363 return -EPERM; 1364 1365 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1366 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1367 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1368 1369 return (res < 0) ? res : count; 1370 } 1371 1372 /* procfs -------------------------------------------------------------- */ 1373 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1374 { 1375 if (id >= TPACPI_RFK_SW_MAX) 1376 seq_printf(m, "status:\t\tnot supported\n"); 1377 else { 1378 int status; 1379 1380 /* This is in the ABI... */ 1381 if (tpacpi_rfk_check_hwblock_state()) { 1382 status = TPACPI_RFK_RADIO_OFF; 1383 } else { 1384 status = tpacpi_rfk_update_swstate( 1385 tpacpi_rfkill_switches[id]); 1386 if (status < 0) 1387 return status; 1388 } 1389 1390 seq_printf(m, "status:\t\t%s\n", 1391 (status == TPACPI_RFK_RADIO_ON) ? 1392 "enabled" : "disabled"); 1393 seq_printf(m, "commands:\tenable, disable\n"); 1394 } 1395 1396 return 0; 1397 } 1398 1399 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1400 { 1401 char *cmd; 1402 int status = -1; 1403 int res = 0; 1404 1405 if (id >= TPACPI_RFK_SW_MAX) 1406 return -ENODEV; 1407 1408 while ((cmd = strsep(&buf, ","))) { 1409 if (strlencmp(cmd, "enable") == 0) 1410 status = TPACPI_RFK_RADIO_ON; 1411 else if (strlencmp(cmd, "disable") == 0) 1412 status = TPACPI_RFK_RADIO_OFF; 1413 else 1414 return -EINVAL; 1415 } 1416 1417 if (status != -1) { 1418 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1419 (status == TPACPI_RFK_RADIO_ON) ? 1420 "enable" : "disable", 1421 tpacpi_rfkill_names[id]); 1422 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1423 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1424 } 1425 1426 return res; 1427 } 1428 1429 /************************************************************************* 1430 * thinkpad-acpi driver attributes 1431 */ 1432 1433 /* interface_version --------------------------------------------------- */ 1434 static ssize_t interface_version_show(struct device_driver *drv, char *buf) 1435 { 1436 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1437 } 1438 static DRIVER_ATTR_RO(interface_version); 1439 1440 /* debug_level --------------------------------------------------------- */ 1441 static ssize_t debug_level_show(struct device_driver *drv, char *buf) 1442 { 1443 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1444 } 1445 1446 static ssize_t debug_level_store(struct device_driver *drv, const char *buf, 1447 size_t count) 1448 { 1449 unsigned long t; 1450 1451 if (parse_strtoul(buf, 0xffff, &t)) 1452 return -EINVAL; 1453 1454 dbg_level = t; 1455 1456 return count; 1457 } 1458 static DRIVER_ATTR_RW(debug_level); 1459 1460 /* version ------------------------------------------------------------- */ 1461 static ssize_t version_show(struct device_driver *drv, char *buf) 1462 { 1463 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1464 TPACPI_DESC, TPACPI_VERSION); 1465 } 1466 static DRIVER_ATTR_RO(version); 1467 1468 /* --------------------------------------------------------------------- */ 1469 1470 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1471 1472 /* wlsw_emulstate ------------------------------------------------------ */ 1473 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf) 1474 { 1475 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1476 } 1477 1478 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf, 1479 size_t count) 1480 { 1481 unsigned long t; 1482 1483 if (parse_strtoul(buf, 1, &t)) 1484 return -EINVAL; 1485 1486 if (tpacpi_wlsw_emulstate != !!t) { 1487 tpacpi_wlsw_emulstate = !!t; 1488 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1489 } 1490 1491 return count; 1492 } 1493 static DRIVER_ATTR_RW(wlsw_emulstate); 1494 1495 /* bluetooth_emulstate ------------------------------------------------- */ 1496 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf) 1497 { 1498 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1499 } 1500 1501 static ssize_t bluetooth_emulstate_store(struct device_driver *drv, 1502 const char *buf, size_t count) 1503 { 1504 unsigned long t; 1505 1506 if (parse_strtoul(buf, 1, &t)) 1507 return -EINVAL; 1508 1509 tpacpi_bluetooth_emulstate = !!t; 1510 1511 return count; 1512 } 1513 static DRIVER_ATTR_RW(bluetooth_emulstate); 1514 1515 /* wwan_emulstate ------------------------------------------------- */ 1516 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf) 1517 { 1518 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1519 } 1520 1521 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf, 1522 size_t count) 1523 { 1524 unsigned long t; 1525 1526 if (parse_strtoul(buf, 1, &t)) 1527 return -EINVAL; 1528 1529 tpacpi_wwan_emulstate = !!t; 1530 1531 return count; 1532 } 1533 static DRIVER_ATTR_RW(wwan_emulstate); 1534 1535 /* uwb_emulstate ------------------------------------------------- */ 1536 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf) 1537 { 1538 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1539 } 1540 1541 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf, 1542 size_t count) 1543 { 1544 unsigned long t; 1545 1546 if (parse_strtoul(buf, 1, &t)) 1547 return -EINVAL; 1548 1549 tpacpi_uwb_emulstate = !!t; 1550 1551 return count; 1552 } 1553 static DRIVER_ATTR_RW(uwb_emulstate); 1554 #endif 1555 1556 /* --------------------------------------------------------------------- */ 1557 1558 static struct driver_attribute *tpacpi_driver_attributes[] = { 1559 &driver_attr_debug_level, &driver_attr_version, 1560 &driver_attr_interface_version, 1561 }; 1562 1563 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1564 { 1565 int i, res; 1566 1567 i = 0; 1568 res = 0; 1569 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1570 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1571 i++; 1572 } 1573 1574 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1575 if (!res && dbg_wlswemul) 1576 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1577 if (!res && dbg_bluetoothemul) 1578 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1579 if (!res && dbg_wwanemul) 1580 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1581 if (!res && dbg_uwbemul) 1582 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1583 #endif 1584 1585 return res; 1586 } 1587 1588 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1589 { 1590 int i; 1591 1592 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1593 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1594 1595 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1596 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1597 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1598 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1599 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1600 #endif 1601 } 1602 1603 /************************************************************************* 1604 * Firmware Data 1605 */ 1606 1607 /* 1608 * Table of recommended minimum BIOS versions 1609 * 1610 * Reasons for listing: 1611 * 1. Stable BIOS, listed because the unknown amount of 1612 * bugs and bad ACPI behaviour on older versions 1613 * 1614 * 2. BIOS or EC fw with known bugs that trigger on Linux 1615 * 1616 * 3. BIOS with known reduced functionality in older versions 1617 * 1618 * We recommend the latest BIOS and EC version. 1619 * We only support the latest BIOS and EC fw version as a rule. 1620 * 1621 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1622 * Information from users in ThinkWiki 1623 * 1624 * WARNING: we use this table also to detect that the machine is 1625 * a ThinkPad in some cases, so don't remove entries lightly. 1626 */ 1627 1628 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1629 { .vendor = (__v), \ 1630 .bios = TPID(__id1, __id2), \ 1631 .ec = TPACPI_MATCH_ANY, \ 1632 .quirks = TPACPI_MATCH_ANY_VERSION << 16 \ 1633 | TPVER(__bv1, __bv2) } 1634 1635 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1636 __eid, __ev1, __ev2) \ 1637 { .vendor = (__v), \ 1638 .bios = TPID(__bid1, __bid2), \ 1639 .ec = __eid, \ 1640 .quirks = TPVER(__ev1, __ev2) << 16 \ 1641 | TPVER(__bv1, __bv2) } 1642 1643 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1644 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1645 1646 /* Outdated IBM BIOSes often lack the EC id string */ 1647 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1648 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1649 __bv1, __bv2, TPID(__id1, __id2), \ 1650 __ev1, __ev2), \ 1651 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1652 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1653 __ev1, __ev2) 1654 1655 /* Outdated IBM BIOSes often lack the EC id string */ 1656 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1657 __eid1, __eid2, __ev1, __ev2) \ 1658 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1659 __bv1, __bv2, TPID(__eid1, __eid2), \ 1660 __ev1, __ev2), \ 1661 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1662 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1663 __ev1, __ev2) 1664 1665 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1666 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1667 1668 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1669 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1670 __bv1, __bv2, TPID(__id1, __id2), \ 1671 __ev1, __ev2) 1672 1673 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1674 __eid1, __eid2, __ev1, __ev2) \ 1675 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1676 __bv1, __bv2, TPID(__eid1, __eid2), \ 1677 __ev1, __ev2) 1678 1679 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1680 /* Numeric models ------------------ */ 1681 /* FW MODEL BIOS VERS */ 1682 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1683 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1684 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1685 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1686 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1687 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1688 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1689 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1690 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1691 1692 /* A-series ------------------------- */ 1693 /* FW MODEL BIOS VERS EC VERS */ 1694 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1695 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1696 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1697 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1698 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1699 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1700 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1701 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1702 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1703 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1704 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1705 1706 /* G-series ------------------------- */ 1707 /* FW MODEL BIOS VERS */ 1708 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1709 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1710 1711 /* R-series, T-series --------------- */ 1712 /* FW MODEL BIOS VERS EC VERS */ 1713 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1714 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1715 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1716 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1717 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1718 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1719 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1720 T40/p, T41/p, T42/p (1) */ 1721 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1722 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1723 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1724 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1725 1726 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1727 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1728 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1729 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1730 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1731 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1732 1733 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1734 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1735 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1736 1737 /* BIOS FW BIOS VERS EC FW EC VERS */ 1738 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1739 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1740 1741 /* X-series ------------------------- */ 1742 /* FW MODEL BIOS VERS EC VERS */ 1743 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1744 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1745 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1746 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1747 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1748 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1749 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1750 1751 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1752 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1753 1754 /* (0) - older versions lack DMI EC fw string and functionality */ 1755 /* (1) - older versions known to lack functionality */ 1756 }; 1757 1758 #undef TPV_QL1 1759 #undef TPV_QL0 1760 #undef TPV_QI2 1761 #undef TPV_QI1 1762 #undef TPV_QI0 1763 #undef TPV_Q_X 1764 #undef TPV_Q 1765 1766 static void __init tpacpi_check_outdated_fw(void) 1767 { 1768 unsigned long fwvers; 1769 u16 ec_version, bios_version; 1770 1771 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1772 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1773 1774 if (!fwvers) 1775 return; 1776 1777 bios_version = fwvers & 0xffffU; 1778 ec_version = (fwvers >> 16) & 0xffffU; 1779 1780 /* note that unknown versions are set to 0x0000 and we use that */ 1781 if ((bios_version > thinkpad_id.bios_release) || 1782 (ec_version > thinkpad_id.ec_release && 1783 ec_version != TPACPI_MATCH_ANY_VERSION)) { 1784 /* 1785 * The changelogs would let us track down the exact 1786 * reason, but it is just too much of a pain to track 1787 * it. We only list BIOSes that are either really 1788 * broken, or really stable to begin with, so it is 1789 * best if the user upgrades the firmware anyway. 1790 */ 1791 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1792 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n"); 1793 } 1794 } 1795 1796 static bool __init tpacpi_is_fw_known(void) 1797 { 1798 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1799 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1800 } 1801 1802 /**************************************************************************** 1803 **************************************************************************** 1804 * 1805 * Subdrivers 1806 * 1807 **************************************************************************** 1808 ****************************************************************************/ 1809 1810 /************************************************************************* 1811 * thinkpad-acpi metadata subdriver 1812 */ 1813 1814 static int thinkpad_acpi_driver_read(struct seq_file *m) 1815 { 1816 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1817 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1818 return 0; 1819 } 1820 1821 static struct ibm_struct thinkpad_acpi_driver_data = { 1822 .name = "driver", 1823 .read = thinkpad_acpi_driver_read, 1824 }; 1825 1826 /************************************************************************* 1827 * Hotkey subdriver 1828 */ 1829 1830 /* 1831 * ThinkPad firmware event model 1832 * 1833 * The ThinkPad firmware has two main event interfaces: normal ACPI 1834 * notifications (which follow the ACPI standard), and a private event 1835 * interface. 1836 * 1837 * The private event interface also issues events for the hotkeys. As 1838 * the driver gained features, the event handling code ended up being 1839 * built around the hotkey subdriver. This will need to be refactored 1840 * to a more formal event API eventually. 1841 * 1842 * Some "hotkeys" are actually supposed to be used as event reports, 1843 * such as "brightness has changed", "volume has changed", depending on 1844 * the ThinkPad model and how the firmware is operating. 1845 * 1846 * Unlike other classes, hotkey-class events have mask/unmask control on 1847 * non-ancient firmware. However, how it behaves changes a lot with the 1848 * firmware model and version. 1849 */ 1850 1851 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1852 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1853 TP_ACPI_HOTKEYSCAN_FNF2, 1854 TP_ACPI_HOTKEYSCAN_FNF3, 1855 TP_ACPI_HOTKEYSCAN_FNF4, 1856 TP_ACPI_HOTKEYSCAN_FNF5, 1857 TP_ACPI_HOTKEYSCAN_FNF6, 1858 TP_ACPI_HOTKEYSCAN_FNF7, 1859 TP_ACPI_HOTKEYSCAN_FNF8, 1860 TP_ACPI_HOTKEYSCAN_FNF9, 1861 TP_ACPI_HOTKEYSCAN_FNF10, 1862 TP_ACPI_HOTKEYSCAN_FNF11, 1863 TP_ACPI_HOTKEYSCAN_FNF12, 1864 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1865 TP_ACPI_HOTKEYSCAN_FNINSERT, 1866 TP_ACPI_HOTKEYSCAN_FNDELETE, 1867 TP_ACPI_HOTKEYSCAN_FNHOME, 1868 TP_ACPI_HOTKEYSCAN_FNEND, 1869 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1870 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1871 TP_ACPI_HOTKEYSCAN_FNSPACE, 1872 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1873 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1874 TP_ACPI_HOTKEYSCAN_MUTE, 1875 TP_ACPI_HOTKEYSCAN_THINKPAD, 1876 TP_ACPI_HOTKEYSCAN_UNK1, 1877 TP_ACPI_HOTKEYSCAN_UNK2, 1878 TP_ACPI_HOTKEYSCAN_UNK3, 1879 TP_ACPI_HOTKEYSCAN_UNK4, 1880 TP_ACPI_HOTKEYSCAN_UNK5, 1881 TP_ACPI_HOTKEYSCAN_UNK6, 1882 TP_ACPI_HOTKEYSCAN_UNK7, 1883 TP_ACPI_HOTKEYSCAN_UNK8, 1884 1885 /* Adaptive keyboard keycodes */ 1886 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1887 TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1888 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1889 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1890 TP_ACPI_HOTKEYSCAN_CLOUD, 1891 TP_ACPI_HOTKEYSCAN_UNK9, 1892 TP_ACPI_HOTKEYSCAN_VOICE, 1893 TP_ACPI_HOTKEYSCAN_UNK10, 1894 TP_ACPI_HOTKEYSCAN_GESTURES, 1895 TP_ACPI_HOTKEYSCAN_UNK11, 1896 TP_ACPI_HOTKEYSCAN_UNK12, 1897 TP_ACPI_HOTKEYSCAN_UNK13, 1898 TP_ACPI_HOTKEYSCAN_CONFIG, 1899 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1900 TP_ACPI_HOTKEYSCAN_RELOAD, 1901 TP_ACPI_HOTKEYSCAN_BACK, 1902 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1903 TP_ACPI_HOTKEYSCAN_MIC_UP, 1904 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1905 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1906 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1907 1908 /* Lenovo extended keymap, starting at 0x1300 */ 1909 TP_ACPI_HOTKEYSCAN_EXTENDED_START, 1910 /* first new observed key (star, favorites) is 0x1311 */ 1911 TP_ACPI_HOTKEYSCAN_STAR = 69, 1912 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2, 1913 TP_ACPI_HOTKEYSCAN_CALCULATOR, 1914 TP_ACPI_HOTKEYSCAN_BLUETOOTH, 1915 TP_ACPI_HOTKEYSCAN_KEYBOARD, 1916 1917 /* Hotkey keymap size */ 1918 TPACPI_HOTKEY_MAP_LEN 1919 }; 1920 1921 enum { /* Keys/events available through NVRAM polling */ 1922 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1923 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1924 }; 1925 1926 enum { /* Positions of some of the keys in hotkey masks */ 1927 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1928 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1929 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1930 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1931 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1932 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1933 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1934 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1935 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1936 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1937 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1938 }; 1939 1940 enum { /* NVRAM to ACPI HKEY group map */ 1941 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1942 TP_ACPI_HKEY_ZOOM_MASK | 1943 TP_ACPI_HKEY_DISPSWTCH_MASK | 1944 TP_ACPI_HKEY_HIBERNATE_MASK, 1945 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1946 TP_ACPI_HKEY_BRGHTDWN_MASK, 1947 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1948 TP_ACPI_HKEY_VOLDWN_MASK | 1949 TP_ACPI_HKEY_MUTE_MASK, 1950 }; 1951 1952 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1953 struct tp_nvram_state { 1954 u16 thinkpad_toggle:1; 1955 u16 zoom_toggle:1; 1956 u16 display_toggle:1; 1957 u16 thinklight_toggle:1; 1958 u16 hibernate_toggle:1; 1959 u16 displayexp_toggle:1; 1960 u16 display_state:1; 1961 u16 brightness_toggle:1; 1962 u16 volume_toggle:1; 1963 u16 mute:1; 1964 1965 u8 brightness_level; 1966 u8 volume_level; 1967 }; 1968 1969 /* kthread for the hotkey poller */ 1970 static struct task_struct *tpacpi_hotkey_task; 1971 1972 /* 1973 * Acquire mutex to write poller control variables as an 1974 * atomic block. 1975 * 1976 * Increment hotkey_config_change when changing them if you 1977 * want the kthread to forget old state. 1978 * 1979 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1980 */ 1981 static struct mutex hotkey_thread_data_mutex; 1982 static unsigned int hotkey_config_change; 1983 1984 /* 1985 * hotkey poller control variables 1986 * 1987 * Must be atomic or readers will also need to acquire mutex 1988 * 1989 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1990 * should be used only when the changes need to be taken as 1991 * a block, OR when one needs to force the kthread to forget 1992 * old state. 1993 */ 1994 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 1995 static unsigned int hotkey_poll_freq = 10; /* Hz */ 1996 1997 #define HOTKEY_CONFIG_CRITICAL_START \ 1998 do { \ 1999 mutex_lock(&hotkey_thread_data_mutex); \ 2000 hotkey_config_change++; \ 2001 } while (0); 2002 #define HOTKEY_CONFIG_CRITICAL_END \ 2003 mutex_unlock(&hotkey_thread_data_mutex); 2004 2005 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2006 2007 #define hotkey_source_mask 0U 2008 #define HOTKEY_CONFIG_CRITICAL_START 2009 #define HOTKEY_CONFIG_CRITICAL_END 2010 2011 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2012 2013 static struct mutex hotkey_mutex; 2014 2015 static enum { /* Reasons for waking up */ 2016 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2017 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2018 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2019 } hotkey_wakeup_reason; 2020 2021 static int hotkey_autosleep_ack; 2022 2023 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2024 static u32 hotkey_all_mask; /* all events supported in fw */ 2025 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */ 2026 static u32 hotkey_reserved_mask; /* events better left disabled */ 2027 static u32 hotkey_driver_mask; /* events needed by the driver */ 2028 static u32 hotkey_user_mask; /* events visible to userspace */ 2029 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2030 2031 static u16 *hotkey_keycode_map; 2032 2033 static struct attribute_set *hotkey_dev_attributes; 2034 2035 static void tpacpi_driver_event(const unsigned int hkey_event); 2036 static void hotkey_driver_event(const unsigned int scancode); 2037 static void hotkey_poll_setup(const bool may_warn); 2038 2039 /* HKEY.MHKG() return bits */ 2040 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2041 enum { 2042 TP_ACPI_MULTI_MODE_INVALID = 0, 2043 TP_ACPI_MULTI_MODE_UNKNOWN = 1 << 0, 2044 TP_ACPI_MULTI_MODE_LAPTOP = 1 << 1, 2045 TP_ACPI_MULTI_MODE_TABLET = 1 << 2, 2046 TP_ACPI_MULTI_MODE_FLAT = 1 << 3, 2047 TP_ACPI_MULTI_MODE_STAND = 1 << 4, 2048 TP_ACPI_MULTI_MODE_TENT = 1 << 5, 2049 TP_ACPI_MULTI_MODE_STAND_TENT = 1 << 6, 2050 }; 2051 2052 enum { 2053 /* The following modes are considered tablet mode for the purpose of 2054 * reporting the status to userspace. i.e. in all these modes it makes 2055 * sense to disable the laptop input devices such as touchpad and 2056 * keyboard. 2057 */ 2058 TP_ACPI_MULTI_MODE_TABLET_LIKE = TP_ACPI_MULTI_MODE_TABLET | 2059 TP_ACPI_MULTI_MODE_STAND | 2060 TP_ACPI_MULTI_MODE_TENT | 2061 TP_ACPI_MULTI_MODE_STAND_TENT, 2062 }; 2063 2064 static int hotkey_get_wlsw(void) 2065 { 2066 int status; 2067 2068 if (!tp_features.hotkey_wlsw) 2069 return -ENODEV; 2070 2071 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2072 if (dbg_wlswemul) 2073 return (tpacpi_wlsw_emulstate) ? 2074 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2075 #endif 2076 2077 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2078 return -EIO; 2079 2080 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2081 } 2082 2083 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode) 2084 { 2085 int type = (s >> 16) & 0xffff; 2086 int value = s & 0xffff; 2087 int mode = TP_ACPI_MULTI_MODE_INVALID; 2088 int valid_modes = 0; 2089 2090 if (has_tablet_mode) 2091 *has_tablet_mode = 0; 2092 2093 switch (type) { 2094 case 1: 2095 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2096 TP_ACPI_MULTI_MODE_TABLET | 2097 TP_ACPI_MULTI_MODE_STAND_TENT; 2098 break; 2099 case 2: 2100 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2101 TP_ACPI_MULTI_MODE_FLAT | 2102 TP_ACPI_MULTI_MODE_TABLET | 2103 TP_ACPI_MULTI_MODE_STAND | 2104 TP_ACPI_MULTI_MODE_TENT; 2105 break; 2106 case 3: 2107 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2108 TP_ACPI_MULTI_MODE_FLAT; 2109 break; 2110 case 4: 2111 case 5: 2112 /* In mode 4, FLAT is not specified as a valid mode. However, 2113 * it can be seen at least on the X1 Yoga 2nd Generation. 2114 */ 2115 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2116 TP_ACPI_MULTI_MODE_FLAT | 2117 TP_ACPI_MULTI_MODE_TABLET | 2118 TP_ACPI_MULTI_MODE_STAND | 2119 TP_ACPI_MULTI_MODE_TENT; 2120 break; 2121 default: 2122 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n", 2123 type, value, TPACPI_MAIL); 2124 return 0; 2125 } 2126 2127 if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE)) 2128 *has_tablet_mode = 1; 2129 2130 switch (value) { 2131 case 1: 2132 mode = TP_ACPI_MULTI_MODE_LAPTOP; 2133 break; 2134 case 2: 2135 mode = TP_ACPI_MULTI_MODE_FLAT; 2136 break; 2137 case 3: 2138 mode = TP_ACPI_MULTI_MODE_TABLET; 2139 break; 2140 case 4: 2141 if (type == 1) 2142 mode = TP_ACPI_MULTI_MODE_STAND_TENT; 2143 else 2144 mode = TP_ACPI_MULTI_MODE_STAND; 2145 break; 2146 case 5: 2147 mode = TP_ACPI_MULTI_MODE_TENT; 2148 break; 2149 default: 2150 if (type == 5 && value == 0xffff) { 2151 pr_warn("Multi mode status is undetected, assuming laptop\n"); 2152 return 0; 2153 } 2154 } 2155 2156 if (!(mode & valid_modes)) { 2157 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n", 2158 value, type, TPACPI_MAIL); 2159 return 0; 2160 } 2161 2162 return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE); 2163 } 2164 2165 static int hotkey_get_tablet_mode(int *status) 2166 { 2167 int s; 2168 2169 switch (tp_features.hotkey_tablet) { 2170 case TP_HOTKEY_TABLET_USES_MHKG: 2171 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2172 return -EIO; 2173 2174 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2175 break; 2176 case TP_HOTKEY_TABLET_USES_GMMS: 2177 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0)) 2178 return -EIO; 2179 2180 *status = hotkey_gmms_get_tablet_mode(s, NULL); 2181 break; 2182 default: 2183 break; 2184 } 2185 2186 return 0; 2187 } 2188 2189 /* 2190 * Reads current event mask from firmware, and updates 2191 * hotkey_acpi_mask accordingly. Also resets any bits 2192 * from hotkey_user_mask that are unavailable to be 2193 * delivered (shadow requirement of the userspace ABI). 2194 * 2195 * Call with hotkey_mutex held 2196 */ 2197 static int hotkey_mask_get(void) 2198 { 2199 if (tp_features.hotkey_mask) { 2200 u32 m = 0; 2201 2202 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2203 return -EIO; 2204 2205 hotkey_acpi_mask = m; 2206 } else { 2207 /* no mask support doesn't mean no event support... */ 2208 hotkey_acpi_mask = hotkey_all_mask; 2209 } 2210 2211 /* sync userspace-visible mask */ 2212 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2213 2214 return 0; 2215 } 2216 2217 static void hotkey_mask_warn_incomplete_mask(void) 2218 { 2219 /* log only what the user can fix... */ 2220 const u32 wantedmask = hotkey_driver_mask & 2221 ~(hotkey_acpi_mask | hotkey_source_mask) & 2222 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2223 2224 if (wantedmask) 2225 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2226 } 2227 2228 /* 2229 * Set the firmware mask when supported 2230 * 2231 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2232 * 2233 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2234 * 2235 * Call with hotkey_mutex held 2236 */ 2237 static int hotkey_mask_set(u32 mask) 2238 { 2239 int i; 2240 int rc = 0; 2241 2242 const u32 fwmask = mask & ~hotkey_source_mask; 2243 2244 if (tp_features.hotkey_mask) { 2245 for (i = 0; i < 32; i++) { 2246 if (!acpi_evalf(hkey_handle, 2247 NULL, "MHKM", "vdd", i + 1, 2248 !!(mask & (1 << i)))) { 2249 rc = -EIO; 2250 break; 2251 } 2252 } 2253 } 2254 2255 /* 2256 * We *must* make an inconditional call to hotkey_mask_get to 2257 * refresh hotkey_acpi_mask and update hotkey_user_mask 2258 * 2259 * Take the opportunity to also log when we cannot _enable_ 2260 * a given event. 2261 */ 2262 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2263 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n", 2264 fwmask, hotkey_acpi_mask); 2265 } 2266 2267 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2268 hotkey_mask_warn_incomplete_mask(); 2269 2270 return rc; 2271 } 2272 2273 /* 2274 * Sets hotkey_user_mask and tries to set the firmware mask 2275 * 2276 * Call with hotkey_mutex held 2277 */ 2278 static int hotkey_user_mask_set(const u32 mask) 2279 { 2280 int rc; 2281 2282 /* Give people a chance to notice they are doing something that 2283 * is bound to go boom on their users sooner or later */ 2284 if (!tp_warned.hotkey_mask_ff && 2285 (mask == 0xffff || mask == 0xffffff || 2286 mask == 0xffffffff)) { 2287 tp_warned.hotkey_mask_ff = 1; 2288 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n", 2289 mask); 2290 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n"); 2291 } 2292 2293 /* Try to enable what the user asked for, plus whatever we need. 2294 * this syncs everything but won't enable bits in hotkey_user_mask */ 2295 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2296 2297 /* Enable the available bits in hotkey_user_mask */ 2298 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2299 2300 return rc; 2301 } 2302 2303 /* 2304 * Sets the driver hotkey mask. 2305 * 2306 * Can be called even if the hotkey subdriver is inactive 2307 */ 2308 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2309 { 2310 int rc; 2311 2312 /* Do the right thing if hotkey_init has not been called yet */ 2313 if (!tp_features.hotkey) { 2314 hotkey_driver_mask = mask; 2315 return 0; 2316 } 2317 2318 mutex_lock(&hotkey_mutex); 2319 2320 HOTKEY_CONFIG_CRITICAL_START 2321 hotkey_driver_mask = mask; 2322 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2323 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2324 #endif 2325 HOTKEY_CONFIG_CRITICAL_END 2326 2327 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2328 ~hotkey_source_mask); 2329 hotkey_poll_setup(true); 2330 2331 mutex_unlock(&hotkey_mutex); 2332 2333 return rc; 2334 } 2335 2336 static int hotkey_status_get(int *status) 2337 { 2338 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2339 return -EIO; 2340 2341 return 0; 2342 } 2343 2344 static int hotkey_status_set(bool enable) 2345 { 2346 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2347 return -EIO; 2348 2349 return 0; 2350 } 2351 2352 static void tpacpi_input_send_tabletsw(void) 2353 { 2354 int state; 2355 2356 if (tp_features.hotkey_tablet && 2357 !hotkey_get_tablet_mode(&state)) { 2358 mutex_lock(&tpacpi_inputdev_send_mutex); 2359 2360 input_report_switch(tpacpi_inputdev, 2361 SW_TABLET_MODE, !!state); 2362 input_sync(tpacpi_inputdev); 2363 2364 mutex_unlock(&tpacpi_inputdev_send_mutex); 2365 } 2366 } 2367 2368 /* Do NOT call without validating scancode first */ 2369 static void tpacpi_input_send_key(const unsigned int scancode) 2370 { 2371 const unsigned int keycode = hotkey_keycode_map[scancode]; 2372 2373 if (keycode != KEY_RESERVED) { 2374 mutex_lock(&tpacpi_inputdev_send_mutex); 2375 2376 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2377 input_report_key(tpacpi_inputdev, keycode, 1); 2378 input_sync(tpacpi_inputdev); 2379 2380 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2381 input_report_key(tpacpi_inputdev, keycode, 0); 2382 input_sync(tpacpi_inputdev); 2383 2384 mutex_unlock(&tpacpi_inputdev_send_mutex); 2385 } 2386 } 2387 2388 /* Do NOT call without validating scancode first */ 2389 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2390 { 2391 hotkey_driver_event(scancode); 2392 if (hotkey_user_mask & (1 << scancode)) 2393 tpacpi_input_send_key(scancode); 2394 } 2395 2396 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2397 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2398 2399 /* Do NOT call without validating scancode first */ 2400 static void tpacpi_hotkey_send_key(unsigned int scancode) 2401 { 2402 tpacpi_input_send_key_masked(scancode); 2403 } 2404 2405 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2406 { 2407 u8 d; 2408 2409 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2410 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2411 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2412 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2413 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2414 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2415 } 2416 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) { 2417 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2418 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2419 } 2420 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2421 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2422 n->displayexp_toggle = 2423 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2424 } 2425 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2426 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2427 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2428 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2429 n->brightness_toggle = 2430 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2431 } 2432 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2433 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2434 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2435 >> TP_NVRAM_POS_LEVEL_VOLUME; 2436 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2437 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2438 } 2439 } 2440 2441 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2442 do { \ 2443 if ((event_mask & (1 << __scancode)) && \ 2444 oldn->__member != newn->__member) \ 2445 tpacpi_hotkey_send_key(__scancode); \ 2446 } while (0) 2447 2448 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2449 do { \ 2450 if (event_mask & (1 << __scancode)) \ 2451 tpacpi_hotkey_send_key(__scancode); \ 2452 } while (0) 2453 2454 static void issue_volchange(const unsigned int oldvol, 2455 const unsigned int newvol, 2456 const u32 event_mask) 2457 { 2458 unsigned int i = oldvol; 2459 2460 while (i > newvol) { 2461 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2462 i--; 2463 } 2464 while (i < newvol) { 2465 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2466 i++; 2467 } 2468 } 2469 2470 static void issue_brightnesschange(const unsigned int oldbrt, 2471 const unsigned int newbrt, 2472 const u32 event_mask) 2473 { 2474 unsigned int i = oldbrt; 2475 2476 while (i > newbrt) { 2477 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2478 i--; 2479 } 2480 while (i < newbrt) { 2481 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2482 i++; 2483 } 2484 } 2485 2486 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2487 struct tp_nvram_state *newn, 2488 const u32 event_mask) 2489 { 2490 2491 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2492 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2493 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2494 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2495 2496 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2497 2498 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2499 2500 /* 2501 * Handle volume 2502 * 2503 * This code is supposed to duplicate the IBM firmware behaviour: 2504 * - Pressing MUTE issues mute hotkey message, even when already mute 2505 * - Pressing Volume up/down issues volume up/down hotkey messages, 2506 * even when already at maximum or minimum volume 2507 * - The act of unmuting issues volume up/down notification, 2508 * depending which key was used to unmute 2509 * 2510 * We are constrained to what the NVRAM can tell us, which is not much 2511 * and certainly not enough if more than one volume hotkey was pressed 2512 * since the last poll cycle. 2513 * 2514 * Just to make our life interesting, some newer Lenovo ThinkPads have 2515 * bugs in the BIOS and may fail to update volume_toggle properly. 2516 */ 2517 if (newn->mute) { 2518 /* muted */ 2519 if (!oldn->mute || 2520 oldn->volume_toggle != newn->volume_toggle || 2521 oldn->volume_level != newn->volume_level) { 2522 /* recently muted, or repeated mute keypress, or 2523 * multiple presses ending in mute */ 2524 issue_volchange(oldn->volume_level, newn->volume_level, 2525 event_mask); 2526 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2527 } 2528 } else { 2529 /* unmute */ 2530 if (oldn->mute) { 2531 /* recently unmuted, issue 'unmute' keypress */ 2532 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2533 } 2534 if (oldn->volume_level != newn->volume_level) { 2535 issue_volchange(oldn->volume_level, newn->volume_level, 2536 event_mask); 2537 } else if (oldn->volume_toggle != newn->volume_toggle) { 2538 /* repeated vol up/down keypress at end of scale ? */ 2539 if (newn->volume_level == 0) 2540 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2541 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2542 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2543 } 2544 } 2545 2546 /* handle brightness */ 2547 if (oldn->brightness_level != newn->brightness_level) { 2548 issue_brightnesschange(oldn->brightness_level, 2549 newn->brightness_level, event_mask); 2550 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2551 /* repeated key presses that didn't change state */ 2552 if (newn->brightness_level == 0) 2553 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2554 else if (newn->brightness_level >= bright_maxlvl 2555 && !tp_features.bright_unkfw) 2556 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2557 } 2558 2559 #undef TPACPI_COMPARE_KEY 2560 #undef TPACPI_MAY_SEND_KEY 2561 } 2562 2563 /* 2564 * Polling driver 2565 * 2566 * We track all events in hotkey_source_mask all the time, since 2567 * most of them are edge-based. We only issue those requested by 2568 * hotkey_user_mask or hotkey_driver_mask, though. 2569 */ 2570 static int hotkey_kthread(void *data) 2571 { 2572 struct tp_nvram_state s[2]; 2573 u32 poll_mask, event_mask; 2574 unsigned int si, so; 2575 unsigned long t; 2576 unsigned int change_detector; 2577 unsigned int poll_freq; 2578 bool was_frozen; 2579 2580 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2581 goto exit; 2582 2583 set_freezable(); 2584 2585 so = 0; 2586 si = 1; 2587 t = 0; 2588 2589 /* Initial state for compares */ 2590 mutex_lock(&hotkey_thread_data_mutex); 2591 change_detector = hotkey_config_change; 2592 poll_mask = hotkey_source_mask; 2593 event_mask = hotkey_source_mask & 2594 (hotkey_driver_mask | hotkey_user_mask); 2595 poll_freq = hotkey_poll_freq; 2596 mutex_unlock(&hotkey_thread_data_mutex); 2597 hotkey_read_nvram(&s[so], poll_mask); 2598 2599 while (!kthread_should_stop()) { 2600 if (t == 0) { 2601 if (likely(poll_freq)) 2602 t = 1000/poll_freq; 2603 else 2604 t = 100; /* should never happen... */ 2605 } 2606 t = msleep_interruptible(t); 2607 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2608 break; 2609 2610 if (t > 0 && !was_frozen) 2611 continue; 2612 2613 mutex_lock(&hotkey_thread_data_mutex); 2614 if (was_frozen || hotkey_config_change != change_detector) { 2615 /* forget old state on thaw or config change */ 2616 si = so; 2617 t = 0; 2618 change_detector = hotkey_config_change; 2619 } 2620 poll_mask = hotkey_source_mask; 2621 event_mask = hotkey_source_mask & 2622 (hotkey_driver_mask | hotkey_user_mask); 2623 poll_freq = hotkey_poll_freq; 2624 mutex_unlock(&hotkey_thread_data_mutex); 2625 2626 if (likely(poll_mask)) { 2627 hotkey_read_nvram(&s[si], poll_mask); 2628 if (likely(si != so)) { 2629 hotkey_compare_and_issue_event(&s[so], &s[si], 2630 event_mask); 2631 } 2632 } 2633 2634 so = si; 2635 si ^= 1; 2636 } 2637 2638 exit: 2639 return 0; 2640 } 2641 2642 /* call with hotkey_mutex held */ 2643 static void hotkey_poll_stop_sync(void) 2644 { 2645 if (tpacpi_hotkey_task) { 2646 kthread_stop(tpacpi_hotkey_task); 2647 tpacpi_hotkey_task = NULL; 2648 } 2649 } 2650 2651 /* call with hotkey_mutex held */ 2652 static void hotkey_poll_setup(const bool may_warn) 2653 { 2654 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2655 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2656 2657 if (hotkey_poll_freq > 0 && 2658 (poll_driver_mask || 2659 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2660 if (!tpacpi_hotkey_task) { 2661 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2662 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2663 if (IS_ERR(tpacpi_hotkey_task)) { 2664 tpacpi_hotkey_task = NULL; 2665 pr_err("could not create kernel thread for hotkey polling\n"); 2666 } 2667 } 2668 } else { 2669 hotkey_poll_stop_sync(); 2670 if (may_warn && (poll_driver_mask || poll_user_mask) && 2671 hotkey_poll_freq == 0) { 2672 pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n", 2673 poll_user_mask, poll_driver_mask); 2674 } 2675 } 2676 } 2677 2678 static void hotkey_poll_setup_safe(const bool may_warn) 2679 { 2680 mutex_lock(&hotkey_mutex); 2681 hotkey_poll_setup(may_warn); 2682 mutex_unlock(&hotkey_mutex); 2683 } 2684 2685 /* call with hotkey_mutex held */ 2686 static void hotkey_poll_set_freq(unsigned int freq) 2687 { 2688 if (!freq) 2689 hotkey_poll_stop_sync(); 2690 2691 hotkey_poll_freq = freq; 2692 } 2693 2694 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2695 2696 static void hotkey_poll_setup(const bool __unused) 2697 { 2698 } 2699 2700 static void hotkey_poll_setup_safe(const bool __unused) 2701 { 2702 } 2703 2704 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2705 2706 static int hotkey_inputdev_open(struct input_dev *dev) 2707 { 2708 switch (tpacpi_lifecycle) { 2709 case TPACPI_LIFE_INIT: 2710 case TPACPI_LIFE_RUNNING: 2711 hotkey_poll_setup_safe(false); 2712 return 0; 2713 case TPACPI_LIFE_EXITING: 2714 return -EBUSY; 2715 } 2716 2717 /* Should only happen if tpacpi_lifecycle is corrupt */ 2718 BUG(); 2719 return -EBUSY; 2720 } 2721 2722 static void hotkey_inputdev_close(struct input_dev *dev) 2723 { 2724 /* disable hotkey polling when possible */ 2725 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2726 !(hotkey_source_mask & hotkey_driver_mask)) 2727 hotkey_poll_setup_safe(false); 2728 } 2729 2730 /* sysfs hotkey enable ------------------------------------------------- */ 2731 static ssize_t hotkey_enable_show(struct device *dev, 2732 struct device_attribute *attr, 2733 char *buf) 2734 { 2735 int res, status; 2736 2737 printk_deprecated_attribute("hotkey_enable", 2738 "Hotkey reporting is always enabled"); 2739 2740 res = hotkey_status_get(&status); 2741 if (res) 2742 return res; 2743 2744 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2745 } 2746 2747 static ssize_t hotkey_enable_store(struct device *dev, 2748 struct device_attribute *attr, 2749 const char *buf, size_t count) 2750 { 2751 unsigned long t; 2752 2753 printk_deprecated_attribute("hotkey_enable", 2754 "Hotkeys can be disabled through hotkey_mask"); 2755 2756 if (parse_strtoul(buf, 1, &t)) 2757 return -EINVAL; 2758 2759 if (t == 0) 2760 return -EPERM; 2761 2762 return count; 2763 } 2764 2765 static DEVICE_ATTR_RW(hotkey_enable); 2766 2767 /* sysfs hotkey mask --------------------------------------------------- */ 2768 static ssize_t hotkey_mask_show(struct device *dev, 2769 struct device_attribute *attr, 2770 char *buf) 2771 { 2772 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2773 } 2774 2775 static ssize_t hotkey_mask_store(struct device *dev, 2776 struct device_attribute *attr, 2777 const char *buf, size_t count) 2778 { 2779 unsigned long t; 2780 int res; 2781 2782 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2783 return -EINVAL; 2784 2785 if (mutex_lock_killable(&hotkey_mutex)) 2786 return -ERESTARTSYS; 2787 2788 res = hotkey_user_mask_set(t); 2789 2790 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2791 hotkey_poll_setup(true); 2792 #endif 2793 2794 mutex_unlock(&hotkey_mutex); 2795 2796 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2797 2798 return (res) ? res : count; 2799 } 2800 2801 static DEVICE_ATTR_RW(hotkey_mask); 2802 2803 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2804 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2805 struct device_attribute *attr, 2806 char *buf) 2807 { 2808 return sprintf(buf, "0\n"); 2809 } 2810 2811 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2812 2813 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2814 static ssize_t hotkey_bios_mask_show(struct device *dev, 2815 struct device_attribute *attr, 2816 char *buf) 2817 { 2818 printk_deprecated_attribute("hotkey_bios_mask", 2819 "This attribute is useless."); 2820 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2821 } 2822 2823 static DEVICE_ATTR_RO(hotkey_bios_mask); 2824 2825 /* sysfs hotkey all_mask ----------------------------------------------- */ 2826 static ssize_t hotkey_all_mask_show(struct device *dev, 2827 struct device_attribute *attr, 2828 char *buf) 2829 { 2830 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2831 hotkey_all_mask | hotkey_source_mask); 2832 } 2833 2834 static DEVICE_ATTR_RO(hotkey_all_mask); 2835 2836 /* sysfs hotkey all_mask ----------------------------------------------- */ 2837 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev, 2838 struct device_attribute *attr, 2839 char *buf) 2840 { 2841 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2842 hotkey_adaptive_all_mask | hotkey_source_mask); 2843 } 2844 2845 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask); 2846 2847 /* sysfs hotkey recommended_mask --------------------------------------- */ 2848 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2849 struct device_attribute *attr, 2850 char *buf) 2851 { 2852 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2853 (hotkey_all_mask | hotkey_source_mask) 2854 & ~hotkey_reserved_mask); 2855 } 2856 2857 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2858 2859 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2860 2861 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2862 static ssize_t hotkey_source_mask_show(struct device *dev, 2863 struct device_attribute *attr, 2864 char *buf) 2865 { 2866 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2867 } 2868 2869 static ssize_t hotkey_source_mask_store(struct device *dev, 2870 struct device_attribute *attr, 2871 const char *buf, size_t count) 2872 { 2873 unsigned long t; 2874 u32 r_ev; 2875 int rc; 2876 2877 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2878 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2879 return -EINVAL; 2880 2881 if (mutex_lock_killable(&hotkey_mutex)) 2882 return -ERESTARTSYS; 2883 2884 HOTKEY_CONFIG_CRITICAL_START 2885 hotkey_source_mask = t; 2886 HOTKEY_CONFIG_CRITICAL_END 2887 2888 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2889 ~hotkey_source_mask); 2890 hotkey_poll_setup(true); 2891 2892 /* check if events needed by the driver got disabled */ 2893 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2894 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2895 2896 mutex_unlock(&hotkey_mutex); 2897 2898 if (rc < 0) 2899 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n"); 2900 2901 if (r_ev) 2902 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n", 2903 r_ev); 2904 2905 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2906 2907 return (rc < 0) ? rc : count; 2908 } 2909 2910 static DEVICE_ATTR_RW(hotkey_source_mask); 2911 2912 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2913 static ssize_t hotkey_poll_freq_show(struct device *dev, 2914 struct device_attribute *attr, 2915 char *buf) 2916 { 2917 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2918 } 2919 2920 static ssize_t hotkey_poll_freq_store(struct device *dev, 2921 struct device_attribute *attr, 2922 const char *buf, size_t count) 2923 { 2924 unsigned long t; 2925 2926 if (parse_strtoul(buf, 25, &t)) 2927 return -EINVAL; 2928 2929 if (mutex_lock_killable(&hotkey_mutex)) 2930 return -ERESTARTSYS; 2931 2932 hotkey_poll_set_freq(t); 2933 hotkey_poll_setup(true); 2934 2935 mutex_unlock(&hotkey_mutex); 2936 2937 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2938 2939 return count; 2940 } 2941 2942 static DEVICE_ATTR_RW(hotkey_poll_freq); 2943 2944 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2945 2946 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2947 static ssize_t hotkey_radio_sw_show(struct device *dev, 2948 struct device_attribute *attr, 2949 char *buf) 2950 { 2951 int res; 2952 res = hotkey_get_wlsw(); 2953 if (res < 0) 2954 return res; 2955 2956 /* Opportunistic update */ 2957 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2958 2959 return snprintf(buf, PAGE_SIZE, "%d\n", 2960 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2961 } 2962 2963 static DEVICE_ATTR_RO(hotkey_radio_sw); 2964 2965 static void hotkey_radio_sw_notify_change(void) 2966 { 2967 if (tp_features.hotkey_wlsw) 2968 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2969 "hotkey_radio_sw"); 2970 } 2971 2972 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2973 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2974 struct device_attribute *attr, 2975 char *buf) 2976 { 2977 int res, s; 2978 res = hotkey_get_tablet_mode(&s); 2979 if (res < 0) 2980 return res; 2981 2982 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2983 } 2984 2985 static DEVICE_ATTR_RO(hotkey_tablet_mode); 2986 2987 static void hotkey_tablet_mode_notify_change(void) 2988 { 2989 if (tp_features.hotkey_tablet) 2990 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2991 "hotkey_tablet_mode"); 2992 } 2993 2994 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2995 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2996 struct device_attribute *attr, 2997 char *buf) 2998 { 2999 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 3000 } 3001 3002 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 3003 3004 static void hotkey_wakeup_reason_notify_change(void) 3005 { 3006 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3007 "wakeup_reason"); 3008 } 3009 3010 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 3011 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 3012 struct device_attribute *attr, 3013 char *buf) 3014 { 3015 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 3016 } 3017 3018 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 3019 hotkey_wakeup_hotunplug_complete_show, NULL); 3020 3021 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 3022 { 3023 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3024 "wakeup_hotunplug_complete"); 3025 } 3026 3027 /* sysfs adaptive kbd mode --------------------------------------------- */ 3028 3029 static int adaptive_keyboard_get_mode(void); 3030 static int adaptive_keyboard_set_mode(int new_mode); 3031 3032 enum ADAPTIVE_KEY_MODE { 3033 HOME_MODE, 3034 WEB_BROWSER_MODE, 3035 WEB_CONFERENCE_MODE, 3036 FUNCTION_MODE, 3037 LAYFLAT_MODE 3038 }; 3039 3040 static ssize_t adaptive_kbd_mode_show(struct device *dev, 3041 struct device_attribute *attr, 3042 char *buf) 3043 { 3044 int current_mode; 3045 3046 current_mode = adaptive_keyboard_get_mode(); 3047 if (current_mode < 0) 3048 return current_mode; 3049 3050 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 3051 } 3052 3053 static ssize_t adaptive_kbd_mode_store(struct device *dev, 3054 struct device_attribute *attr, 3055 const char *buf, size_t count) 3056 { 3057 unsigned long t; 3058 int res; 3059 3060 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 3061 return -EINVAL; 3062 3063 res = adaptive_keyboard_set_mode(t); 3064 return (res < 0) ? res : count; 3065 } 3066 3067 static DEVICE_ATTR_RW(adaptive_kbd_mode); 3068 3069 static struct attribute *adaptive_kbd_attributes[] = { 3070 &dev_attr_adaptive_kbd_mode.attr, 3071 NULL 3072 }; 3073 3074 static const struct attribute_group adaptive_kbd_attr_group = { 3075 .attrs = adaptive_kbd_attributes, 3076 }; 3077 3078 /* --------------------------------------------------------------------- */ 3079 3080 static struct attribute *hotkey_attributes[] __initdata = { 3081 &dev_attr_hotkey_enable.attr, 3082 &dev_attr_hotkey_bios_enabled.attr, 3083 &dev_attr_hotkey_bios_mask.attr, 3084 &dev_attr_wakeup_reason.attr, 3085 &dev_attr_wakeup_hotunplug_complete.attr, 3086 &dev_attr_hotkey_mask.attr, 3087 &dev_attr_hotkey_all_mask.attr, 3088 &dev_attr_hotkey_adaptive_all_mask.attr, 3089 &dev_attr_hotkey_recommended_mask.attr, 3090 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3091 &dev_attr_hotkey_source_mask.attr, 3092 &dev_attr_hotkey_poll_freq.attr, 3093 #endif 3094 }; 3095 3096 /* 3097 * Sync both the hw and sw blocking state of all switches 3098 */ 3099 static void tpacpi_send_radiosw_update(void) 3100 { 3101 int wlsw; 3102 3103 /* 3104 * We must sync all rfkill controllers *before* issuing any 3105 * rfkill input events, or we will race the rfkill core input 3106 * handler. 3107 * 3108 * tpacpi_inputdev_send_mutex works as a synchronization point 3109 * for the above. 3110 * 3111 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3112 */ 3113 3114 wlsw = hotkey_get_wlsw(); 3115 3116 /* Sync hw blocking state first if it is hw-blocked */ 3117 if (wlsw == TPACPI_RFK_RADIO_OFF) 3118 tpacpi_rfk_update_hwblock_state(true); 3119 3120 /* Sync sw blocking state */ 3121 tpacpi_rfk_update_swstate_all(); 3122 3123 /* Sync hw blocking state last if it is hw-unblocked */ 3124 if (wlsw == TPACPI_RFK_RADIO_ON) 3125 tpacpi_rfk_update_hwblock_state(false); 3126 3127 /* Issue rfkill input event for WLSW switch */ 3128 if (!(wlsw < 0)) { 3129 mutex_lock(&tpacpi_inputdev_send_mutex); 3130 3131 input_report_switch(tpacpi_inputdev, 3132 SW_RFKILL_ALL, (wlsw > 0)); 3133 input_sync(tpacpi_inputdev); 3134 3135 mutex_unlock(&tpacpi_inputdev_send_mutex); 3136 } 3137 3138 /* 3139 * this can be unconditional, as we will poll state again 3140 * if userspace uses the notify to read data 3141 */ 3142 hotkey_radio_sw_notify_change(); 3143 } 3144 3145 static void hotkey_exit(void) 3146 { 3147 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3148 mutex_lock(&hotkey_mutex); 3149 hotkey_poll_stop_sync(); 3150 mutex_unlock(&hotkey_mutex); 3151 #endif 3152 3153 if (hotkey_dev_attributes) 3154 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3155 3156 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3157 "restoring original HKEY status and mask\n"); 3158 /* yes, there is a bitwise or below, we want the 3159 * functions to be called even if one of them fail */ 3160 if (((tp_features.hotkey_mask && 3161 hotkey_mask_set(hotkey_orig_mask)) | 3162 hotkey_status_set(false)) != 0) 3163 pr_err("failed to restore hot key mask to BIOS defaults\n"); 3164 } 3165 3166 static void __init hotkey_unmap(const unsigned int scancode) 3167 { 3168 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3169 clear_bit(hotkey_keycode_map[scancode], 3170 tpacpi_inputdev->keybit); 3171 hotkey_keycode_map[scancode] = KEY_RESERVED; 3172 } 3173 } 3174 3175 /* 3176 * HKEY quirks: 3177 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3178 */ 3179 3180 #define TPACPI_HK_Q_INIMASK 0x0001 3181 3182 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3183 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3184 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3185 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3186 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3187 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3188 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3189 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3190 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3191 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3192 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3193 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3194 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3195 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3196 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3197 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3198 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3199 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3200 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3201 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3202 }; 3203 3204 typedef u16 tpacpi_keymap_entry_t; 3205 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3206 3207 static int hotkey_init_tablet_mode(void) 3208 { 3209 int in_tablet_mode = 0, res; 3210 char *type = NULL; 3211 3212 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) { 3213 int has_tablet_mode; 3214 3215 in_tablet_mode = hotkey_gmms_get_tablet_mode(res, 3216 &has_tablet_mode); 3217 if (has_tablet_mode) 3218 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS; 3219 type = "GMMS"; 3220 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { 3221 /* For X41t, X60t, X61t Tablets... */ 3222 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; 3223 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); 3224 type = "MHKG"; 3225 } 3226 3227 if (!tp_features.hotkey_tablet) 3228 return 0; 3229 3230 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", 3231 type, in_tablet_mode ? "tablet" : "laptop"); 3232 3233 res = add_to_attr_set(hotkey_dev_attributes, 3234 &dev_attr_hotkey_tablet_mode.attr); 3235 if (res) 3236 return -1; 3237 3238 return in_tablet_mode; 3239 } 3240 3241 static int __init hotkey_init(struct ibm_init_struct *iibm) 3242 { 3243 /* Requirements for changing the default keymaps: 3244 * 3245 * 1. Many of the keys are mapped to KEY_RESERVED for very 3246 * good reasons. Do not change them unless you have deep 3247 * knowledge on the IBM and Lenovo ThinkPad firmware for 3248 * the various ThinkPad models. The driver behaves 3249 * differently for KEY_RESERVED: such keys have their 3250 * hot key mask *unset* in mask_recommended, and also 3251 * in the initial hot key mask programmed into the 3252 * firmware at driver load time, which means the firm- 3253 * ware may react very differently if you change them to 3254 * something else; 3255 * 3256 * 2. You must be subscribed to the linux-thinkpad and 3257 * ibm-acpi-devel mailing lists, and you should read the 3258 * list archives since 2007 if you want to change the 3259 * keymaps. This requirement exists so that you will 3260 * know the past history of problems with the thinkpad- 3261 * acpi driver keymaps, and also that you will be 3262 * listening to any bug reports; 3263 * 3264 * 3. Do not send thinkpad-acpi specific patches directly to 3265 * for merging, *ever*. Send them to the linux-acpi 3266 * mailinglist for comments. Merging is to be done only 3267 * through acpi-test and the ACPI maintainer. 3268 * 3269 * If the above is too much to ask, don't change the keymap. 3270 * Ask the thinkpad-acpi maintainer to do it, instead. 3271 */ 3272 3273 enum keymap_index { 3274 TPACPI_KEYMAP_IBM_GENERIC = 0, 3275 TPACPI_KEYMAP_LENOVO_GENERIC, 3276 }; 3277 3278 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3279 /* Generic keymap for IBM ThinkPads */ 3280 [TPACPI_KEYMAP_IBM_GENERIC] = { 3281 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3282 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3283 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3284 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3285 3286 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3287 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3288 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3289 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3290 3291 /* brightness: firmware always reacts to them */ 3292 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3293 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3294 3295 /* Thinklight: firmware always react to it */ 3296 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3297 3298 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3299 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3300 3301 /* Volume: firmware always react to it and reprograms 3302 * the built-in *extra* mixer. Never map it to control 3303 * another mixer by default. */ 3304 KEY_RESERVED, /* 0x14: VOLUME UP */ 3305 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3306 KEY_RESERVED, /* 0x16: MUTE */ 3307 3308 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3309 3310 /* (assignments unknown, please report if found) */ 3311 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3312 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3313 3314 /* No assignments, only used for Adaptive keyboards. */ 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, KEY_UNKNOWN, 3320 3321 /* No assignment, used for newer Lenovo models */ 3322 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3323 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3324 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3325 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3326 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3327 KEY_UNKNOWN, KEY_UNKNOWN 3328 3329 }, 3330 3331 /* Generic keymap for Lenovo ThinkPads */ 3332 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3333 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3334 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3335 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3336 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3337 3338 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3339 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3340 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3341 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3342 3343 /* These should be enabled --only-- when ACPI video 3344 * is disabled (i.e. in "vendor" mode), and are handled 3345 * in a special way by the init code */ 3346 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3347 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3348 3349 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3350 3351 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3352 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3353 3354 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3355 * react to it and reprograms the built-in *extra* mixer. 3356 * Never map it to control another mixer by default. 3357 * 3358 * T60?, T61, R60?, R61: firmware and EC tries to send 3359 * these over the regular keyboard, so these are no-ops, 3360 * but there are still weird bugs re. MUTE, so do not 3361 * change unless you get test reports from all Lenovo 3362 * models. May cause the BIOS to interfere with the 3363 * HDA mixer. 3364 */ 3365 KEY_RESERVED, /* 0x14: VOLUME UP */ 3366 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3367 KEY_RESERVED, /* 0x16: MUTE */ 3368 3369 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3370 3371 /* (assignments unknown, please report if found) */ 3372 KEY_UNKNOWN, KEY_UNKNOWN, 3373 3374 /* 3375 * The mic mute button only sends 0x1a. It does not 3376 * automatically mute the mic or change the mute light. 3377 */ 3378 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3379 3380 /* (assignments unknown, please report if found) */ 3381 KEY_UNKNOWN, 3382 3383 /* Extra keys in use since the X240 / T440 / T540 */ 3384 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3385 3386 /* 3387 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3388 * The first item in this list is the Mute button which is 3389 * emitted with 0x103 through 3390 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3391 * symbol is held. 3392 * We'll need to offset those by 0x20. 3393 */ 3394 KEY_RESERVED, /* Mute held, 0x103 */ 3395 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3396 KEY_RESERVED, /* Clipping tool */ 3397 KEY_RESERVED, /* Cloud */ 3398 KEY_RESERVED, 3399 KEY_VOICECOMMAND, /* Voice */ 3400 KEY_RESERVED, 3401 KEY_RESERVED, /* Gestures */ 3402 KEY_RESERVED, 3403 KEY_RESERVED, 3404 KEY_RESERVED, 3405 KEY_CONFIG, /* Settings */ 3406 KEY_RESERVED, /* New tab */ 3407 KEY_REFRESH, /* Reload */ 3408 KEY_BACK, /* Back */ 3409 KEY_RESERVED, /* Microphone down */ 3410 KEY_RESERVED, /* Microphone up */ 3411 KEY_RESERVED, /* Microphone cancellation */ 3412 KEY_RESERVED, /* Camera mode */ 3413 KEY_RESERVED, /* Rotate display, 0x116 */ 3414 3415 /* 3416 * These are found in 2017 models (e.g. T470s, X270). 3417 * The lowest known value is 0x311, which according to 3418 * the manual should launch a user defined favorite 3419 * application. 3420 * 3421 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START, 3422 * corresponding to 0x34. 3423 */ 3424 3425 /* (assignments unknown, please report if found) */ 3426 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3427 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3428 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3429 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3430 KEY_UNKNOWN, 3431 3432 KEY_BOOKMARKS, /* Favorite app, 0x311 */ 3433 KEY_RESERVED, /* Clipping tool */ 3434 KEY_CALC, /* Calculator (above numpad, P52) */ 3435 KEY_BLUETOOTH, /* Bluetooth */ 3436 KEY_KEYBOARD /* Keyboard, 0x315 */ 3437 }, 3438 }; 3439 3440 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3441 /* Generic maps (fallback) */ 3442 { 3443 .vendor = PCI_VENDOR_ID_IBM, 3444 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3445 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3446 }, 3447 { 3448 .vendor = PCI_VENDOR_ID_LENOVO, 3449 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3450 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3451 }, 3452 }; 3453 3454 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3455 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3456 3457 int res, i; 3458 int status; 3459 int hkeyv; 3460 bool radiosw_state = false; 3461 bool tabletsw_state = false; 3462 3463 unsigned long quirks; 3464 unsigned long keymap_id; 3465 3466 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3467 "initializing hotkey subdriver\n"); 3468 3469 BUG_ON(!tpacpi_inputdev); 3470 BUG_ON(tpacpi_inputdev->open != NULL || 3471 tpacpi_inputdev->close != NULL); 3472 3473 TPACPI_ACPIHANDLE_INIT(hkey); 3474 mutex_init(&hotkey_mutex); 3475 3476 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3477 mutex_init(&hotkey_thread_data_mutex); 3478 #endif 3479 3480 /* hotkey not supported on 570 */ 3481 tp_features.hotkey = hkey_handle != NULL; 3482 3483 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3484 "hotkeys are %s\n", 3485 str_supported(tp_features.hotkey)); 3486 3487 if (!tp_features.hotkey) 3488 return 1; 3489 3490 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3491 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3492 3493 tpacpi_disable_brightness_delay(); 3494 3495 /* MUST have enough space for all attributes to be added to 3496 * hotkey_dev_attributes */ 3497 hotkey_dev_attributes = create_attr_set( 3498 ARRAY_SIZE(hotkey_attributes) + 2, 3499 NULL); 3500 if (!hotkey_dev_attributes) 3501 return -ENOMEM; 3502 res = add_many_to_attr_set(hotkey_dev_attributes, 3503 hotkey_attributes, 3504 ARRAY_SIZE(hotkey_attributes)); 3505 if (res) 3506 goto err_exit; 3507 3508 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3509 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3510 for HKEY interface version 0x100 */ 3511 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3512 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3513 "firmware HKEY interface version: 0x%x\n", 3514 hkeyv); 3515 3516 switch (hkeyv >> 8) { 3517 case 1: 3518 /* 3519 * MHKV 0x100 in A31, R40, R40e, 3520 * T4x, X31, and later 3521 */ 3522 3523 /* Paranoia check AND init hotkey_all_mask */ 3524 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3525 "MHKA", "qd")) { 3526 pr_err("missing MHKA handler, please report this to %s\n", 3527 TPACPI_MAIL); 3528 /* Fallback: pre-init for FN+F3,F4,F12 */ 3529 hotkey_all_mask = 0x080cU; 3530 } else { 3531 tp_features.hotkey_mask = 1; 3532 } 3533 break; 3534 3535 case 2: 3536 /* 3537 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3538 */ 3539 3540 /* Paranoia check AND init hotkey_all_mask */ 3541 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3542 "MHKA", "dd", 1)) { 3543 pr_err("missing MHKA handler, please report this to %s\n", 3544 TPACPI_MAIL); 3545 /* Fallback: pre-init for FN+F3,F4,F12 */ 3546 hotkey_all_mask = 0x080cU; 3547 } else { 3548 tp_features.hotkey_mask = 1; 3549 } 3550 3551 /* 3552 * Check if we have an adaptive keyboard, like on the 3553 * Lenovo Carbon X1 2014 (2nd Gen). 3554 */ 3555 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3556 "MHKA", "dd", 2)) { 3557 if (hotkey_adaptive_all_mask != 0) { 3558 tp_features.has_adaptive_kbd = true; 3559 res = sysfs_create_group( 3560 &tpacpi_pdev->dev.kobj, 3561 &adaptive_kbd_attr_group); 3562 if (res) 3563 goto err_exit; 3564 } 3565 } else { 3566 tp_features.has_adaptive_kbd = false; 3567 hotkey_adaptive_all_mask = 0x0U; 3568 } 3569 break; 3570 3571 default: 3572 pr_err("unknown version of the HKEY interface: 0x%x\n", 3573 hkeyv); 3574 pr_err("please report this to %s\n", TPACPI_MAIL); 3575 break; 3576 } 3577 } 3578 3579 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3580 "hotkey masks are %s\n", 3581 str_supported(tp_features.hotkey_mask)); 3582 3583 /* Init hotkey_all_mask if not initialized yet */ 3584 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3585 (quirks & TPACPI_HK_Q_INIMASK)) 3586 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3587 3588 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3589 if (tp_features.hotkey_mask) { 3590 /* hotkey_source_mask *must* be zero for 3591 * the first hotkey_mask_get to return hotkey_orig_mask */ 3592 res = hotkey_mask_get(); 3593 if (res) 3594 goto err_exit; 3595 3596 hotkey_orig_mask = hotkey_acpi_mask; 3597 } else { 3598 hotkey_orig_mask = hotkey_all_mask; 3599 hotkey_acpi_mask = hotkey_all_mask; 3600 } 3601 3602 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3603 if (dbg_wlswemul) { 3604 tp_features.hotkey_wlsw = 1; 3605 radiosw_state = !!tpacpi_wlsw_emulstate; 3606 pr_info("radio switch emulation enabled\n"); 3607 } else 3608 #endif 3609 /* Not all thinkpads have a hardware radio switch */ 3610 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3611 tp_features.hotkey_wlsw = 1; 3612 radiosw_state = !!status; 3613 pr_info("radio switch found; radios are %s\n", 3614 enabled(status, 0)); 3615 } 3616 if (tp_features.hotkey_wlsw) 3617 res = add_to_attr_set(hotkey_dev_attributes, 3618 &dev_attr_hotkey_radio_sw.attr); 3619 3620 res = hotkey_init_tablet_mode(); 3621 if (res < 0) 3622 goto err_exit; 3623 3624 tabletsw_state = res; 3625 3626 res = register_attr_set_with_sysfs(hotkey_dev_attributes, 3627 &tpacpi_pdev->dev.kobj); 3628 if (res) 3629 goto err_exit; 3630 3631 /* Set up key map */ 3632 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3633 ARRAY_SIZE(tpacpi_keymap_qtable)); 3634 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3635 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3636 "using keymap number %lu\n", keymap_id); 3637 3638 hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id], 3639 TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL); 3640 if (!hotkey_keycode_map) { 3641 pr_err("failed to allocate memory for key map\n"); 3642 res = -ENOMEM; 3643 goto err_exit; 3644 } 3645 3646 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3647 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3648 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3649 tpacpi_inputdev->keycode = hotkey_keycode_map; 3650 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3651 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3652 input_set_capability(tpacpi_inputdev, EV_KEY, 3653 hotkey_keycode_map[i]); 3654 } else { 3655 if (i < sizeof(hotkey_reserved_mask)*8) 3656 hotkey_reserved_mask |= 1 << i; 3657 } 3658 } 3659 3660 if (tp_features.hotkey_wlsw) { 3661 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3662 input_report_switch(tpacpi_inputdev, 3663 SW_RFKILL_ALL, radiosw_state); 3664 } 3665 if (tp_features.hotkey_tablet) { 3666 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3667 input_report_switch(tpacpi_inputdev, 3668 SW_TABLET_MODE, tabletsw_state); 3669 } 3670 3671 /* Do not issue duplicate brightness change events to 3672 * userspace. tpacpi_detect_brightness_capabilities() must have 3673 * been called before this point */ 3674 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3675 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n"); 3676 pr_notice("Disabling thinkpad-acpi brightness events by default...\n"); 3677 3678 /* Disable brightness up/down on Lenovo thinkpads when 3679 * ACPI is handling them, otherwise it is plain impossible 3680 * for userspace to do something even remotely sane */ 3681 hotkey_reserved_mask |= 3682 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3683 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3684 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3685 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3686 } 3687 3688 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3689 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3690 & ~hotkey_all_mask 3691 & ~hotkey_reserved_mask; 3692 3693 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3694 "hotkey source mask 0x%08x, polling freq %u\n", 3695 hotkey_source_mask, hotkey_poll_freq); 3696 #endif 3697 3698 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3699 "enabling firmware HKEY event interface...\n"); 3700 res = hotkey_status_set(true); 3701 if (res) { 3702 hotkey_exit(); 3703 return res; 3704 } 3705 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3706 | hotkey_driver_mask) 3707 & ~hotkey_source_mask); 3708 if (res < 0 && res != -ENXIO) { 3709 hotkey_exit(); 3710 return res; 3711 } 3712 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3713 & ~hotkey_reserved_mask; 3714 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3715 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3716 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3717 3718 tpacpi_inputdev->open = &hotkey_inputdev_open; 3719 tpacpi_inputdev->close = &hotkey_inputdev_close; 3720 3721 hotkey_poll_setup_safe(true); 3722 3723 return 0; 3724 3725 err_exit: 3726 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3727 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3728 &adaptive_kbd_attr_group); 3729 3730 hotkey_dev_attributes = NULL; 3731 3732 return (res < 0) ? res : 1; 3733 } 3734 3735 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3736 * mode, Web conference mode, Function mode and Lay-flat mode. 3737 * We support Home mode and Function mode currently. 3738 * 3739 * Will consider support rest of modes in future. 3740 * 3741 */ 3742 static const int adaptive_keyboard_modes[] = { 3743 HOME_MODE, 3744 /* WEB_BROWSER_MODE = 2, 3745 WEB_CONFERENCE_MODE = 3, */ 3746 FUNCTION_MODE 3747 }; 3748 3749 #define DFR_CHANGE_ROW 0x101 3750 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3751 #define FIRST_ADAPTIVE_KEY 0x103 3752 3753 /* press Fn key a while second, it will switch to Function Mode. Then 3754 * release Fn key, previous mode be restored. 3755 */ 3756 static bool adaptive_keyboard_mode_is_saved; 3757 static int adaptive_keyboard_prev_mode; 3758 3759 static int adaptive_keyboard_get_mode(void) 3760 { 3761 int mode = 0; 3762 3763 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3764 pr_err("Cannot read adaptive keyboard mode\n"); 3765 return -EIO; 3766 } 3767 3768 return mode; 3769 } 3770 3771 static int adaptive_keyboard_set_mode(int new_mode) 3772 { 3773 if (new_mode < 0 || 3774 new_mode > LAYFLAT_MODE) 3775 return -EINVAL; 3776 3777 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3778 pr_err("Cannot set adaptive keyboard mode\n"); 3779 return -EIO; 3780 } 3781 3782 return 0; 3783 } 3784 3785 static int adaptive_keyboard_get_next_mode(int mode) 3786 { 3787 size_t i; 3788 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3789 3790 for (i = 0; i <= max_mode; i++) { 3791 if (adaptive_keyboard_modes[i] == mode) 3792 break; 3793 } 3794 3795 if (i >= max_mode) 3796 i = 0; 3797 else 3798 i++; 3799 3800 return adaptive_keyboard_modes[i]; 3801 } 3802 3803 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3804 { 3805 int current_mode = 0; 3806 int new_mode = 0; 3807 int keycode; 3808 3809 switch (scancode) { 3810 case DFR_CHANGE_ROW: 3811 if (adaptive_keyboard_mode_is_saved) { 3812 new_mode = adaptive_keyboard_prev_mode; 3813 adaptive_keyboard_mode_is_saved = false; 3814 } else { 3815 current_mode = adaptive_keyboard_get_mode(); 3816 if (current_mode < 0) 3817 return false; 3818 new_mode = adaptive_keyboard_get_next_mode( 3819 current_mode); 3820 } 3821 3822 if (adaptive_keyboard_set_mode(new_mode) < 0) 3823 return false; 3824 3825 return true; 3826 3827 case DFR_SHOW_QUICKVIEW_ROW: 3828 current_mode = adaptive_keyboard_get_mode(); 3829 if (current_mode < 0) 3830 return false; 3831 3832 adaptive_keyboard_prev_mode = current_mode; 3833 adaptive_keyboard_mode_is_saved = true; 3834 3835 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3836 return false; 3837 return true; 3838 3839 default: 3840 if (scancode < FIRST_ADAPTIVE_KEY || 3841 scancode >= FIRST_ADAPTIVE_KEY + 3842 TP_ACPI_HOTKEYSCAN_EXTENDED_START - 3843 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3844 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3845 scancode); 3846 return false; 3847 } 3848 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + 3849 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START]; 3850 if (keycode != KEY_RESERVED) { 3851 mutex_lock(&tpacpi_inputdev_send_mutex); 3852 3853 input_report_key(tpacpi_inputdev, keycode, 1); 3854 input_sync(tpacpi_inputdev); 3855 3856 input_report_key(tpacpi_inputdev, keycode, 0); 3857 input_sync(tpacpi_inputdev); 3858 3859 mutex_unlock(&tpacpi_inputdev_send_mutex); 3860 } 3861 return true; 3862 } 3863 } 3864 3865 static bool hotkey_notify_hotkey(const u32 hkey, 3866 bool *send_acpi_ev, 3867 bool *ignore_acpi_ev) 3868 { 3869 /* 0x1000-0x1FFF: key presses */ 3870 unsigned int scancode = hkey & 0xfff; 3871 *send_acpi_ev = true; 3872 *ignore_acpi_ev = false; 3873 3874 /* 3875 * Original events are in the 0x10XX range, the adaptive keyboard 3876 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017 3877 * models, additional keys are emitted through 0x13XX. 3878 */ 3879 switch ((hkey >> 8) & 0xf) { 3880 case 0: 3881 if (scancode > 0 && 3882 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3883 /* HKEY event 0x1001 is scancode 0x00 */ 3884 scancode--; 3885 if (!(hotkey_source_mask & (1 << scancode))) { 3886 tpacpi_input_send_key_masked(scancode); 3887 *send_acpi_ev = false; 3888 } else { 3889 *ignore_acpi_ev = true; 3890 } 3891 return true; 3892 } 3893 break; 3894 3895 case 1: 3896 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3897 3898 case 3: 3899 /* Extended keycodes start at 0x300 and our offset into the map 3900 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode 3901 * will be positive, but might not be in the correct range. 3902 */ 3903 scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START); 3904 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START && 3905 scancode < TPACPI_HOTKEY_MAP_LEN) { 3906 tpacpi_input_send_key(scancode); 3907 return true; 3908 } 3909 break; 3910 } 3911 3912 return false; 3913 } 3914 3915 static bool hotkey_notify_wakeup(const u32 hkey, 3916 bool *send_acpi_ev, 3917 bool *ignore_acpi_ev) 3918 { 3919 /* 0x2000-0x2FFF: Wakeup reason */ 3920 *send_acpi_ev = true; 3921 *ignore_acpi_ev = false; 3922 3923 switch (hkey) { 3924 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3925 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3926 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3927 *ignore_acpi_ev = true; 3928 break; 3929 3930 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3931 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3932 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3933 *ignore_acpi_ev = true; 3934 break; 3935 3936 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3937 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3938 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3939 /* how to auto-heal: */ 3940 /* 2313: woke up from S3, go to S4/S5 */ 3941 /* 2413: woke up from S4, go to S5 */ 3942 break; 3943 3944 default: 3945 return false; 3946 } 3947 3948 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3949 pr_info("woke up due to a hot-unplug request...\n"); 3950 hotkey_wakeup_reason_notify_change(); 3951 } 3952 return true; 3953 } 3954 3955 static bool hotkey_notify_dockevent(const u32 hkey, 3956 bool *send_acpi_ev, 3957 bool *ignore_acpi_ev) 3958 { 3959 /* 0x4000-0x4FFF: dock-related events */ 3960 *send_acpi_ev = true; 3961 *ignore_acpi_ev = false; 3962 3963 switch (hkey) { 3964 case TP_HKEY_EV_UNDOCK_ACK: 3965 /* ACPI undock operation completed after wakeup */ 3966 hotkey_autosleep_ack = 1; 3967 pr_info("undocked\n"); 3968 hotkey_wakeup_hotunplug_complete_notify_change(); 3969 return true; 3970 3971 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3972 pr_info("docked into hotplug port replicator\n"); 3973 return true; 3974 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3975 pr_info("undocked from hotplug port replicator\n"); 3976 return true; 3977 3978 default: 3979 return false; 3980 } 3981 } 3982 3983 static bool hotkey_notify_usrevent(const u32 hkey, 3984 bool *send_acpi_ev, 3985 bool *ignore_acpi_ev) 3986 { 3987 /* 0x5000-0x5FFF: human interface helpers */ 3988 *send_acpi_ev = true; 3989 *ignore_acpi_ev = false; 3990 3991 switch (hkey) { 3992 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3993 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3994 return true; 3995 3996 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3997 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3998 tpacpi_input_send_tabletsw(); 3999 hotkey_tablet_mode_notify_change(); 4000 *send_acpi_ev = false; 4001 return true; 4002 4003 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 4004 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 4005 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 4006 /* do not propagate these events */ 4007 *ignore_acpi_ev = true; 4008 return true; 4009 4010 default: 4011 return false; 4012 } 4013 } 4014 4015 static void thermal_dump_all_sensors(void); 4016 4017 static bool hotkey_notify_6xxx(const u32 hkey, 4018 bool *send_acpi_ev, 4019 bool *ignore_acpi_ev) 4020 { 4021 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 4022 *send_acpi_ev = true; 4023 *ignore_acpi_ev = false; 4024 4025 switch (hkey) { 4026 case TP_HKEY_EV_THM_TABLE_CHANGED: 4027 pr_debug("EC reports: Thermal Table has changed\n"); 4028 /* recommended action: do nothing, we don't have 4029 * Lenovo ATM information */ 4030 return true; 4031 case TP_HKEY_EV_THM_CSM_COMPLETED: 4032 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n"); 4033 /* recommended action: do nothing, we don't have 4034 * Lenovo ATM information */ 4035 return true; 4036 case TP_HKEY_EV_THM_TRANSFM_CHANGED: 4037 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n"); 4038 /* recommended action: do nothing, we don't have 4039 * Lenovo ATM information */ 4040 return true; 4041 case TP_HKEY_EV_ALARM_BAT_HOT: 4042 pr_crit("THERMAL ALARM: battery is too hot!\n"); 4043 /* recommended action: warn user through gui */ 4044 break; 4045 case TP_HKEY_EV_ALARM_BAT_XHOT: 4046 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 4047 /* recommended action: immediate sleep/hibernate */ 4048 break; 4049 case TP_HKEY_EV_ALARM_SENSOR_HOT: 4050 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n"); 4051 /* recommended action: warn user through gui, that */ 4052 /* some internal component is too hot */ 4053 break; 4054 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 4055 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n"); 4056 /* recommended action: immediate sleep/hibernate */ 4057 break; 4058 case TP_HKEY_EV_AC_CHANGED: 4059 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 4060 * AC status changed; can be triggered by plugging or 4061 * unplugging AC adapter, docking or undocking. */ 4062 4063 /* fallthrough */ 4064 4065 case TP_HKEY_EV_KEY_NUMLOCK: 4066 case TP_HKEY_EV_KEY_FN: 4067 case TP_HKEY_EV_KEY_FN_ESC: 4068 /* key press events, we just ignore them as long as the EC 4069 * is still reporting them in the normal keyboard stream */ 4070 *send_acpi_ev = false; 4071 *ignore_acpi_ev = true; 4072 return true; 4073 4074 case TP_HKEY_EV_TABLET_CHANGED: 4075 tpacpi_input_send_tabletsw(); 4076 hotkey_tablet_mode_notify_change(); 4077 *send_acpi_ev = false; 4078 return true; 4079 4080 case TP_HKEY_EV_PALM_DETECTED: 4081 case TP_HKEY_EV_PALM_UNDETECTED: 4082 /* palm detected hovering the keyboard, forward to user-space 4083 * via netlink for consumption */ 4084 return true; 4085 4086 default: 4087 /* report simply as unknown, no sensor dump */ 4088 return false; 4089 } 4090 4091 thermal_dump_all_sensors(); 4092 return true; 4093 } 4094 4095 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 4096 { 4097 u32 hkey; 4098 bool send_acpi_ev; 4099 bool ignore_acpi_ev; 4100 bool known_ev; 4101 4102 if (event != 0x80) { 4103 pr_err("unknown HKEY notification event %d\n", event); 4104 /* forward it to userspace, maybe it knows how to handle it */ 4105 acpi_bus_generate_netlink_event( 4106 ibm->acpi->device->pnp.device_class, 4107 dev_name(&ibm->acpi->device->dev), 4108 event, 0); 4109 return; 4110 } 4111 4112 while (1) { 4113 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 4114 pr_err("failed to retrieve HKEY event\n"); 4115 return; 4116 } 4117 4118 if (hkey == 0) { 4119 /* queue empty */ 4120 return; 4121 } 4122 4123 send_acpi_ev = true; 4124 ignore_acpi_ev = false; 4125 4126 switch (hkey >> 12) { 4127 case 1: 4128 /* 0x1000-0x1FFF: key presses */ 4129 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 4130 &ignore_acpi_ev); 4131 break; 4132 case 2: 4133 /* 0x2000-0x2FFF: Wakeup reason */ 4134 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 4135 &ignore_acpi_ev); 4136 break; 4137 case 3: 4138 /* 0x3000-0x3FFF: bay-related wakeups */ 4139 switch (hkey) { 4140 case TP_HKEY_EV_BAYEJ_ACK: 4141 hotkey_autosleep_ack = 1; 4142 pr_info("bay ejected\n"); 4143 hotkey_wakeup_hotunplug_complete_notify_change(); 4144 known_ev = true; 4145 break; 4146 case TP_HKEY_EV_OPTDRV_EJ: 4147 /* FIXME: kick libata if SATA link offline */ 4148 known_ev = true; 4149 break; 4150 default: 4151 known_ev = false; 4152 } 4153 break; 4154 case 4: 4155 /* 0x4000-0x4FFF: dock-related events */ 4156 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 4157 &ignore_acpi_ev); 4158 break; 4159 case 5: 4160 /* 0x5000-0x5FFF: human interface helpers */ 4161 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 4162 &ignore_acpi_ev); 4163 break; 4164 case 6: 4165 /* 0x6000-0x6FFF: thermal alarms/notices and 4166 * keyboard events */ 4167 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 4168 &ignore_acpi_ev); 4169 break; 4170 case 7: 4171 /* 0x7000-0x7FFF: misc */ 4172 if (tp_features.hotkey_wlsw && 4173 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 4174 tpacpi_send_radiosw_update(); 4175 send_acpi_ev = 0; 4176 known_ev = true; 4177 break; 4178 } 4179 /* fallthrough - to default */ 4180 default: 4181 known_ev = false; 4182 } 4183 if (!known_ev) { 4184 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4185 pr_notice("please report the conditions when this event happened to %s\n", 4186 TPACPI_MAIL); 4187 } 4188 4189 /* netlink events */ 4190 if (!ignore_acpi_ev && send_acpi_ev) { 4191 acpi_bus_generate_netlink_event( 4192 ibm->acpi->device->pnp.device_class, 4193 dev_name(&ibm->acpi->device->dev), 4194 event, hkey); 4195 } 4196 } 4197 } 4198 4199 static void hotkey_suspend(void) 4200 { 4201 /* Do these on suspend, we get the events on early resume! */ 4202 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4203 hotkey_autosleep_ack = 0; 4204 4205 /* save previous mode of adaptive keyboard of X1 Carbon */ 4206 if (tp_features.has_adaptive_kbd) { 4207 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4208 "GTRW", "dd", 0)) { 4209 pr_err("Cannot read adaptive keyboard mode.\n"); 4210 } 4211 } 4212 } 4213 4214 static void hotkey_resume(void) 4215 { 4216 tpacpi_disable_brightness_delay(); 4217 4218 if (hotkey_status_set(true) < 0 || 4219 hotkey_mask_set(hotkey_acpi_mask) < 0) 4220 pr_err("error while attempting to reset the event firmware interface\n"); 4221 4222 tpacpi_send_radiosw_update(); 4223 hotkey_tablet_mode_notify_change(); 4224 hotkey_wakeup_reason_notify_change(); 4225 hotkey_wakeup_hotunplug_complete_notify_change(); 4226 hotkey_poll_setup_safe(false); 4227 4228 /* restore previous mode of adapive keyboard of X1 Carbon */ 4229 if (tp_features.has_adaptive_kbd) { 4230 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4231 adaptive_keyboard_prev_mode)) { 4232 pr_err("Cannot set adaptive keyboard mode.\n"); 4233 } 4234 } 4235 } 4236 4237 /* procfs -------------------------------------------------------------- */ 4238 static int hotkey_read(struct seq_file *m) 4239 { 4240 int res, status; 4241 4242 if (!tp_features.hotkey) { 4243 seq_printf(m, "status:\t\tnot supported\n"); 4244 return 0; 4245 } 4246 4247 if (mutex_lock_killable(&hotkey_mutex)) 4248 return -ERESTARTSYS; 4249 res = hotkey_status_get(&status); 4250 if (!res) 4251 res = hotkey_mask_get(); 4252 mutex_unlock(&hotkey_mutex); 4253 if (res) 4254 return res; 4255 4256 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4257 if (hotkey_all_mask) { 4258 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4259 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4260 } else { 4261 seq_printf(m, "mask:\t\tnot supported\n"); 4262 seq_printf(m, "commands:\tenable, disable, reset\n"); 4263 } 4264 4265 return 0; 4266 } 4267 4268 static void hotkey_enabledisable_warn(bool enable) 4269 { 4270 tpacpi_log_usertask("procfs hotkey enable/disable"); 4271 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4272 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n"))) 4273 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n"); 4274 } 4275 4276 static int hotkey_write(char *buf) 4277 { 4278 int res; 4279 u32 mask; 4280 char *cmd; 4281 4282 if (!tp_features.hotkey) 4283 return -ENODEV; 4284 4285 if (mutex_lock_killable(&hotkey_mutex)) 4286 return -ERESTARTSYS; 4287 4288 mask = hotkey_user_mask; 4289 4290 res = 0; 4291 while ((cmd = strsep(&buf, ","))) { 4292 if (strlencmp(cmd, "enable") == 0) { 4293 hotkey_enabledisable_warn(1); 4294 } else if (strlencmp(cmd, "disable") == 0) { 4295 hotkey_enabledisable_warn(0); 4296 res = -EPERM; 4297 } else if (strlencmp(cmd, "reset") == 0) { 4298 mask = (hotkey_all_mask | hotkey_source_mask) 4299 & ~hotkey_reserved_mask; 4300 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4301 /* mask set */ 4302 } else if (sscanf(cmd, "%x", &mask) == 1) { 4303 /* mask set */ 4304 } else { 4305 res = -EINVAL; 4306 goto errexit; 4307 } 4308 } 4309 4310 if (!res) { 4311 tpacpi_disclose_usertask("procfs hotkey", 4312 "set mask to 0x%08x\n", mask); 4313 res = hotkey_user_mask_set(mask); 4314 } 4315 4316 errexit: 4317 mutex_unlock(&hotkey_mutex); 4318 return res; 4319 } 4320 4321 static const struct acpi_device_id ibm_htk_device_ids[] = { 4322 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4323 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4324 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0}, 4325 {"", 0}, 4326 }; 4327 4328 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4329 .hid = ibm_htk_device_ids, 4330 .notify = hotkey_notify, 4331 .handle = &hkey_handle, 4332 .type = ACPI_DEVICE_NOTIFY, 4333 }; 4334 4335 static struct ibm_struct hotkey_driver_data = { 4336 .name = "hotkey", 4337 .read = hotkey_read, 4338 .write = hotkey_write, 4339 .exit = hotkey_exit, 4340 .resume = hotkey_resume, 4341 .suspend = hotkey_suspend, 4342 .acpi = &ibm_hotkey_acpidriver, 4343 }; 4344 4345 /************************************************************************* 4346 * Bluetooth subdriver 4347 */ 4348 4349 enum { 4350 /* ACPI GBDC/SBDC bits */ 4351 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4352 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4353 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4354 0 = disable, 1 = enable */ 4355 }; 4356 4357 enum { 4358 /* ACPI \BLTH commands */ 4359 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4360 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4361 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4362 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4363 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4364 }; 4365 4366 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4367 4368 static int bluetooth_get_status(void) 4369 { 4370 int status; 4371 4372 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4373 if (dbg_bluetoothemul) 4374 return (tpacpi_bluetooth_emulstate) ? 4375 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4376 #endif 4377 4378 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4379 return -EIO; 4380 4381 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4382 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4383 } 4384 4385 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4386 { 4387 int status; 4388 4389 vdbg_printk(TPACPI_DBG_RFKILL, 4390 "will attempt to %s bluetooth\n", 4391 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4392 4393 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4394 if (dbg_bluetoothemul) { 4395 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4396 return 0; 4397 } 4398 #endif 4399 4400 if (state == TPACPI_RFK_RADIO_ON) 4401 status = TP_ACPI_BLUETOOTH_RADIOSSW 4402 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4403 else 4404 status = 0; 4405 4406 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4407 return -EIO; 4408 4409 return 0; 4410 } 4411 4412 /* sysfs bluetooth enable ---------------------------------------------- */ 4413 static ssize_t bluetooth_enable_show(struct device *dev, 4414 struct device_attribute *attr, 4415 char *buf) 4416 { 4417 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4418 attr, buf); 4419 } 4420 4421 static ssize_t bluetooth_enable_store(struct device *dev, 4422 struct device_attribute *attr, 4423 const char *buf, size_t count) 4424 { 4425 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4426 attr, buf, count); 4427 } 4428 4429 static DEVICE_ATTR_RW(bluetooth_enable); 4430 4431 /* --------------------------------------------------------------------- */ 4432 4433 static struct attribute *bluetooth_attributes[] = { 4434 &dev_attr_bluetooth_enable.attr, 4435 NULL 4436 }; 4437 4438 static const struct attribute_group bluetooth_attr_group = { 4439 .attrs = bluetooth_attributes, 4440 }; 4441 4442 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4443 .get_status = bluetooth_get_status, 4444 .set_status = bluetooth_set_status, 4445 }; 4446 4447 static void bluetooth_shutdown(void) 4448 { 4449 /* Order firmware to save current state to NVRAM */ 4450 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4451 TP_ACPI_BLTH_SAVE_STATE)) 4452 pr_notice("failed to save bluetooth state to NVRAM\n"); 4453 else 4454 vdbg_printk(TPACPI_DBG_RFKILL, 4455 "bluetooth state saved to NVRAM\n"); 4456 } 4457 4458 static void bluetooth_exit(void) 4459 { 4460 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4461 &bluetooth_attr_group); 4462 4463 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4464 4465 bluetooth_shutdown(); 4466 } 4467 4468 static const struct dmi_system_id bt_fwbug_list[] __initconst = { 4469 { 4470 .ident = "ThinkPad E485", 4471 .matches = { 4472 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4473 DMI_MATCH(DMI_BOARD_NAME, "20KU"), 4474 }, 4475 }, 4476 { 4477 .ident = "ThinkPad E585", 4478 .matches = { 4479 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4480 DMI_MATCH(DMI_BOARD_NAME, "20KV"), 4481 }, 4482 }, 4483 { 4484 .ident = "ThinkPad A285 - 20MW", 4485 .matches = { 4486 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4487 DMI_MATCH(DMI_BOARD_NAME, "20MW"), 4488 }, 4489 }, 4490 { 4491 .ident = "ThinkPad A285 - 20MX", 4492 .matches = { 4493 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4494 DMI_MATCH(DMI_BOARD_NAME, "20MX"), 4495 }, 4496 }, 4497 { 4498 .ident = "ThinkPad A485 - 20MU", 4499 .matches = { 4500 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4501 DMI_MATCH(DMI_BOARD_NAME, "20MU"), 4502 }, 4503 }, 4504 { 4505 .ident = "ThinkPad A485 - 20MV", 4506 .matches = { 4507 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4508 DMI_MATCH(DMI_BOARD_NAME, "20MV"), 4509 }, 4510 }, 4511 {} 4512 }; 4513 4514 static const struct pci_device_id fwbug_cards_ids[] __initconst = { 4515 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) }, 4516 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) }, 4517 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) }, 4518 {} 4519 }; 4520 4521 4522 static int __init have_bt_fwbug(void) 4523 { 4524 /* 4525 * Some AMD based ThinkPads have a firmware bug that calling 4526 * "GBDC" will cause bluetooth on Intel wireless cards blocked 4527 */ 4528 if (dmi_check_system(bt_fwbug_list) && pci_dev_present(fwbug_cards_ids)) { 4529 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4530 FW_BUG "disable bluetooth subdriver for Intel cards\n"); 4531 return 1; 4532 } else 4533 return 0; 4534 } 4535 4536 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4537 { 4538 int res; 4539 int status = 0; 4540 4541 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4542 "initializing bluetooth subdriver\n"); 4543 4544 TPACPI_ACPIHANDLE_INIT(hkey); 4545 4546 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4547 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4548 tp_features.bluetooth = !have_bt_fwbug() && hkey_handle && 4549 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4550 4551 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4552 "bluetooth is %s, status 0x%02x\n", 4553 str_supported(tp_features.bluetooth), 4554 status); 4555 4556 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4557 if (dbg_bluetoothemul) { 4558 tp_features.bluetooth = 1; 4559 pr_info("bluetooth switch emulation enabled\n"); 4560 } else 4561 #endif 4562 if (tp_features.bluetooth && 4563 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4564 /* no bluetooth hardware present in system */ 4565 tp_features.bluetooth = 0; 4566 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4567 "bluetooth hardware not installed\n"); 4568 } 4569 4570 if (!tp_features.bluetooth) 4571 return 1; 4572 4573 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4574 &bluetooth_tprfk_ops, 4575 RFKILL_TYPE_BLUETOOTH, 4576 TPACPI_RFK_BLUETOOTH_SW_NAME, 4577 true); 4578 if (res) 4579 return res; 4580 4581 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4582 &bluetooth_attr_group); 4583 if (res) { 4584 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4585 return res; 4586 } 4587 4588 return 0; 4589 } 4590 4591 /* procfs -------------------------------------------------------------- */ 4592 static int bluetooth_read(struct seq_file *m) 4593 { 4594 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4595 } 4596 4597 static int bluetooth_write(char *buf) 4598 { 4599 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4600 } 4601 4602 static struct ibm_struct bluetooth_driver_data = { 4603 .name = "bluetooth", 4604 .read = bluetooth_read, 4605 .write = bluetooth_write, 4606 .exit = bluetooth_exit, 4607 .shutdown = bluetooth_shutdown, 4608 }; 4609 4610 /************************************************************************* 4611 * Wan subdriver 4612 */ 4613 4614 enum { 4615 /* ACPI GWAN/SWAN bits */ 4616 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4617 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4618 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4619 0 = disable, 1 = enable */ 4620 }; 4621 4622 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4623 4624 static int wan_get_status(void) 4625 { 4626 int status; 4627 4628 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4629 if (dbg_wwanemul) 4630 return (tpacpi_wwan_emulstate) ? 4631 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4632 #endif 4633 4634 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4635 return -EIO; 4636 4637 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4638 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4639 } 4640 4641 static int wan_set_status(enum tpacpi_rfkill_state state) 4642 { 4643 int status; 4644 4645 vdbg_printk(TPACPI_DBG_RFKILL, 4646 "will attempt to %s wwan\n", 4647 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4648 4649 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4650 if (dbg_wwanemul) { 4651 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4652 return 0; 4653 } 4654 #endif 4655 4656 if (state == TPACPI_RFK_RADIO_ON) 4657 status = TP_ACPI_WANCARD_RADIOSSW 4658 | TP_ACPI_WANCARD_RESUMECTRL; 4659 else 4660 status = 0; 4661 4662 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4663 return -EIO; 4664 4665 return 0; 4666 } 4667 4668 /* sysfs wan enable ---------------------------------------------------- */ 4669 static ssize_t wan_enable_show(struct device *dev, 4670 struct device_attribute *attr, 4671 char *buf) 4672 { 4673 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4674 attr, buf); 4675 } 4676 4677 static ssize_t wan_enable_store(struct device *dev, 4678 struct device_attribute *attr, 4679 const char *buf, size_t count) 4680 { 4681 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4682 attr, buf, count); 4683 } 4684 4685 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4686 wan_enable_show, wan_enable_store); 4687 4688 /* --------------------------------------------------------------------- */ 4689 4690 static struct attribute *wan_attributes[] = { 4691 &dev_attr_wwan_enable.attr, 4692 NULL 4693 }; 4694 4695 static const struct attribute_group wan_attr_group = { 4696 .attrs = wan_attributes, 4697 }; 4698 4699 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4700 .get_status = wan_get_status, 4701 .set_status = wan_set_status, 4702 }; 4703 4704 static void wan_shutdown(void) 4705 { 4706 /* Order firmware to save current state to NVRAM */ 4707 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4708 TP_ACPI_WGSV_SAVE_STATE)) 4709 pr_notice("failed to save WWAN state to NVRAM\n"); 4710 else 4711 vdbg_printk(TPACPI_DBG_RFKILL, 4712 "WWAN state saved to NVRAM\n"); 4713 } 4714 4715 static void wan_exit(void) 4716 { 4717 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4718 &wan_attr_group); 4719 4720 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4721 4722 wan_shutdown(); 4723 } 4724 4725 static int __init wan_init(struct ibm_init_struct *iibm) 4726 { 4727 int res; 4728 int status = 0; 4729 4730 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4731 "initializing wan subdriver\n"); 4732 4733 TPACPI_ACPIHANDLE_INIT(hkey); 4734 4735 tp_features.wan = hkey_handle && 4736 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4737 4738 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4739 "wan is %s, status 0x%02x\n", 4740 str_supported(tp_features.wan), 4741 status); 4742 4743 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4744 if (dbg_wwanemul) { 4745 tp_features.wan = 1; 4746 pr_info("wwan switch emulation enabled\n"); 4747 } else 4748 #endif 4749 if (tp_features.wan && 4750 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4751 /* no wan hardware present in system */ 4752 tp_features.wan = 0; 4753 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4754 "wan hardware not installed\n"); 4755 } 4756 4757 if (!tp_features.wan) 4758 return 1; 4759 4760 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4761 &wan_tprfk_ops, 4762 RFKILL_TYPE_WWAN, 4763 TPACPI_RFK_WWAN_SW_NAME, 4764 true); 4765 if (res) 4766 return res; 4767 4768 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4769 &wan_attr_group); 4770 4771 if (res) { 4772 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4773 return res; 4774 } 4775 4776 return 0; 4777 } 4778 4779 /* procfs -------------------------------------------------------------- */ 4780 static int wan_read(struct seq_file *m) 4781 { 4782 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4783 } 4784 4785 static int wan_write(char *buf) 4786 { 4787 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4788 } 4789 4790 static struct ibm_struct wan_driver_data = { 4791 .name = "wan", 4792 .read = wan_read, 4793 .write = wan_write, 4794 .exit = wan_exit, 4795 .shutdown = wan_shutdown, 4796 }; 4797 4798 /************************************************************************* 4799 * UWB subdriver 4800 */ 4801 4802 enum { 4803 /* ACPI GUWB/SUWB bits */ 4804 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4805 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4806 }; 4807 4808 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4809 4810 static int uwb_get_status(void) 4811 { 4812 int status; 4813 4814 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4815 if (dbg_uwbemul) 4816 return (tpacpi_uwb_emulstate) ? 4817 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4818 #endif 4819 4820 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4821 return -EIO; 4822 4823 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4824 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4825 } 4826 4827 static int uwb_set_status(enum tpacpi_rfkill_state state) 4828 { 4829 int status; 4830 4831 vdbg_printk(TPACPI_DBG_RFKILL, 4832 "will attempt to %s UWB\n", 4833 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4834 4835 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4836 if (dbg_uwbemul) { 4837 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4838 return 0; 4839 } 4840 #endif 4841 4842 if (state == TPACPI_RFK_RADIO_ON) 4843 status = TP_ACPI_UWB_RADIOSSW; 4844 else 4845 status = 0; 4846 4847 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4848 return -EIO; 4849 4850 return 0; 4851 } 4852 4853 /* --------------------------------------------------------------------- */ 4854 4855 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4856 .get_status = uwb_get_status, 4857 .set_status = uwb_set_status, 4858 }; 4859 4860 static void uwb_exit(void) 4861 { 4862 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4863 } 4864 4865 static int __init uwb_init(struct ibm_init_struct *iibm) 4866 { 4867 int res; 4868 int status = 0; 4869 4870 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4871 "initializing uwb subdriver\n"); 4872 4873 TPACPI_ACPIHANDLE_INIT(hkey); 4874 4875 tp_features.uwb = hkey_handle && 4876 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4877 4878 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4879 "uwb is %s, status 0x%02x\n", 4880 str_supported(tp_features.uwb), 4881 status); 4882 4883 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4884 if (dbg_uwbemul) { 4885 tp_features.uwb = 1; 4886 pr_info("uwb switch emulation enabled\n"); 4887 } else 4888 #endif 4889 if (tp_features.uwb && 4890 !(status & TP_ACPI_UWB_HWPRESENT)) { 4891 /* no uwb hardware present in system */ 4892 tp_features.uwb = 0; 4893 dbg_printk(TPACPI_DBG_INIT, 4894 "uwb hardware not installed\n"); 4895 } 4896 4897 if (!tp_features.uwb) 4898 return 1; 4899 4900 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4901 &uwb_tprfk_ops, 4902 RFKILL_TYPE_UWB, 4903 TPACPI_RFK_UWB_SW_NAME, 4904 false); 4905 return res; 4906 } 4907 4908 static struct ibm_struct uwb_driver_data = { 4909 .name = "uwb", 4910 .exit = uwb_exit, 4911 .flags.experimental = 1, 4912 }; 4913 4914 /************************************************************************* 4915 * Video subdriver 4916 */ 4917 4918 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4919 4920 enum video_access_mode { 4921 TPACPI_VIDEO_NONE = 0, 4922 TPACPI_VIDEO_570, /* 570 */ 4923 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4924 TPACPI_VIDEO_NEW, /* all others */ 4925 }; 4926 4927 enum { /* video status flags, based on VIDEO_570 */ 4928 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4929 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4930 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4931 }; 4932 4933 enum { /* TPACPI_VIDEO_570 constants */ 4934 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4935 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4936 * video_status_flags */ 4937 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4938 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4939 }; 4940 4941 static enum video_access_mode video_supported; 4942 static int video_orig_autosw; 4943 4944 static int video_autosw_get(void); 4945 static int video_autosw_set(int enable); 4946 4947 TPACPI_HANDLE(vid, root, 4948 "\\_SB.PCI.AGP.VGA", /* 570 */ 4949 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4950 "\\_SB.PCI0.VID0", /* 770e */ 4951 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4952 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4953 "\\_SB.PCI0.AGP.VID", /* all others */ 4954 ); /* R30, R31 */ 4955 4956 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4957 4958 static int __init video_init(struct ibm_init_struct *iibm) 4959 { 4960 int ivga; 4961 4962 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4963 4964 TPACPI_ACPIHANDLE_INIT(vid); 4965 if (tpacpi_is_ibm()) 4966 TPACPI_ACPIHANDLE_INIT(vid2); 4967 4968 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4969 /* G41, assume IVGA doesn't change */ 4970 vid_handle = vid2_handle; 4971 4972 if (!vid_handle) 4973 /* video switching not supported on R30, R31 */ 4974 video_supported = TPACPI_VIDEO_NONE; 4975 else if (tpacpi_is_ibm() && 4976 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4977 /* 570 */ 4978 video_supported = TPACPI_VIDEO_570; 4979 else if (tpacpi_is_ibm() && 4980 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4981 /* 600e/x, 770e, 770x */ 4982 video_supported = TPACPI_VIDEO_770; 4983 else 4984 /* all others */ 4985 video_supported = TPACPI_VIDEO_NEW; 4986 4987 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4988 str_supported(video_supported != TPACPI_VIDEO_NONE), 4989 video_supported); 4990 4991 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 4992 } 4993 4994 static void video_exit(void) 4995 { 4996 dbg_printk(TPACPI_DBG_EXIT, 4997 "restoring original video autoswitch mode\n"); 4998 if (video_autosw_set(video_orig_autosw)) 4999 pr_err("error while trying to restore original video autoswitch mode\n"); 5000 } 5001 5002 static int video_outputsw_get(void) 5003 { 5004 int status = 0; 5005 int i; 5006 5007 switch (video_supported) { 5008 case TPACPI_VIDEO_570: 5009 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 5010 TP_ACPI_VIDEO_570_PHSCMD)) 5011 return -EIO; 5012 status = i & TP_ACPI_VIDEO_570_PHSMASK; 5013 break; 5014 case TPACPI_VIDEO_770: 5015 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 5016 return -EIO; 5017 if (i) 5018 status |= TP_ACPI_VIDEO_S_LCD; 5019 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 5020 return -EIO; 5021 if (i) 5022 status |= TP_ACPI_VIDEO_S_CRT; 5023 break; 5024 case TPACPI_VIDEO_NEW: 5025 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 5026 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 5027 return -EIO; 5028 if (i) 5029 status |= TP_ACPI_VIDEO_S_CRT; 5030 5031 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 5032 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 5033 return -EIO; 5034 if (i) 5035 status |= TP_ACPI_VIDEO_S_LCD; 5036 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 5037 return -EIO; 5038 if (i) 5039 status |= TP_ACPI_VIDEO_S_DVI; 5040 break; 5041 default: 5042 return -ENOSYS; 5043 } 5044 5045 return status; 5046 } 5047 5048 static int video_outputsw_set(int status) 5049 { 5050 int autosw; 5051 int res = 0; 5052 5053 switch (video_supported) { 5054 case TPACPI_VIDEO_570: 5055 res = acpi_evalf(NULL, NULL, 5056 "\\_SB.PHS2", "vdd", 5057 TP_ACPI_VIDEO_570_PHS2CMD, 5058 status | TP_ACPI_VIDEO_570_PHS2SET); 5059 break; 5060 case TPACPI_VIDEO_770: 5061 autosw = video_autosw_get(); 5062 if (autosw < 0) 5063 return autosw; 5064 5065 res = video_autosw_set(1); 5066 if (res) 5067 return res; 5068 res = acpi_evalf(vid_handle, NULL, 5069 "ASWT", "vdd", status * 0x100, 0); 5070 if (!autosw && video_autosw_set(autosw)) { 5071 pr_err("video auto-switch left enabled due to error\n"); 5072 return -EIO; 5073 } 5074 break; 5075 case TPACPI_VIDEO_NEW: 5076 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 5077 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 5078 break; 5079 default: 5080 return -ENOSYS; 5081 } 5082 5083 return (res) ? 0 : -EIO; 5084 } 5085 5086 static int video_autosw_get(void) 5087 { 5088 int autosw = 0; 5089 5090 switch (video_supported) { 5091 case TPACPI_VIDEO_570: 5092 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 5093 return -EIO; 5094 break; 5095 case TPACPI_VIDEO_770: 5096 case TPACPI_VIDEO_NEW: 5097 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 5098 return -EIO; 5099 break; 5100 default: 5101 return -ENOSYS; 5102 } 5103 5104 return autosw & 1; 5105 } 5106 5107 static int video_autosw_set(int enable) 5108 { 5109 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 5110 return -EIO; 5111 return 0; 5112 } 5113 5114 static int video_outputsw_cycle(void) 5115 { 5116 int autosw = video_autosw_get(); 5117 int res; 5118 5119 if (autosw < 0) 5120 return autosw; 5121 5122 switch (video_supported) { 5123 case TPACPI_VIDEO_570: 5124 res = video_autosw_set(1); 5125 if (res) 5126 return res; 5127 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 5128 break; 5129 case TPACPI_VIDEO_770: 5130 case TPACPI_VIDEO_NEW: 5131 res = video_autosw_set(1); 5132 if (res) 5133 return res; 5134 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 5135 break; 5136 default: 5137 return -ENOSYS; 5138 } 5139 if (!autosw && video_autosw_set(autosw)) { 5140 pr_err("video auto-switch left enabled due to error\n"); 5141 return -EIO; 5142 } 5143 5144 return (res) ? 0 : -EIO; 5145 } 5146 5147 static int video_expand_toggle(void) 5148 { 5149 switch (video_supported) { 5150 case TPACPI_VIDEO_570: 5151 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 5152 0 : -EIO; 5153 case TPACPI_VIDEO_770: 5154 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 5155 0 : -EIO; 5156 case TPACPI_VIDEO_NEW: 5157 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 5158 0 : -EIO; 5159 default: 5160 return -ENOSYS; 5161 } 5162 /* not reached */ 5163 } 5164 5165 static int video_read(struct seq_file *m) 5166 { 5167 int status, autosw; 5168 5169 if (video_supported == TPACPI_VIDEO_NONE) { 5170 seq_printf(m, "status:\t\tnot supported\n"); 5171 return 0; 5172 } 5173 5174 /* Even reads can crash X.org, so... */ 5175 if (!capable(CAP_SYS_ADMIN)) 5176 return -EPERM; 5177 5178 status = video_outputsw_get(); 5179 if (status < 0) 5180 return status; 5181 5182 autosw = video_autosw_get(); 5183 if (autosw < 0) 5184 return autosw; 5185 5186 seq_printf(m, "status:\t\tsupported\n"); 5187 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 5188 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 5189 if (video_supported == TPACPI_VIDEO_NEW) 5190 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 5191 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 5192 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5193 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5194 if (video_supported == TPACPI_VIDEO_NEW) 5195 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5196 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5197 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5198 5199 return 0; 5200 } 5201 5202 static int video_write(char *buf) 5203 { 5204 char *cmd; 5205 int enable, disable, status; 5206 int res; 5207 5208 if (video_supported == TPACPI_VIDEO_NONE) 5209 return -ENODEV; 5210 5211 /* Even reads can crash X.org, let alone writes... */ 5212 if (!capable(CAP_SYS_ADMIN)) 5213 return -EPERM; 5214 5215 enable = 0; 5216 disable = 0; 5217 5218 while ((cmd = strsep(&buf, ","))) { 5219 if (strlencmp(cmd, "lcd_enable") == 0) { 5220 enable |= TP_ACPI_VIDEO_S_LCD; 5221 } else if (strlencmp(cmd, "lcd_disable") == 0) { 5222 disable |= TP_ACPI_VIDEO_S_LCD; 5223 } else if (strlencmp(cmd, "crt_enable") == 0) { 5224 enable |= TP_ACPI_VIDEO_S_CRT; 5225 } else if (strlencmp(cmd, "crt_disable") == 0) { 5226 disable |= TP_ACPI_VIDEO_S_CRT; 5227 } else if (video_supported == TPACPI_VIDEO_NEW && 5228 strlencmp(cmd, "dvi_enable") == 0) { 5229 enable |= TP_ACPI_VIDEO_S_DVI; 5230 } else if (video_supported == TPACPI_VIDEO_NEW && 5231 strlencmp(cmd, "dvi_disable") == 0) { 5232 disable |= TP_ACPI_VIDEO_S_DVI; 5233 } else if (strlencmp(cmd, "auto_enable") == 0) { 5234 res = video_autosw_set(1); 5235 if (res) 5236 return res; 5237 } else if (strlencmp(cmd, "auto_disable") == 0) { 5238 res = video_autosw_set(0); 5239 if (res) 5240 return res; 5241 } else if (strlencmp(cmd, "video_switch") == 0) { 5242 res = video_outputsw_cycle(); 5243 if (res) 5244 return res; 5245 } else if (strlencmp(cmd, "expand_toggle") == 0) { 5246 res = video_expand_toggle(); 5247 if (res) 5248 return res; 5249 } else 5250 return -EINVAL; 5251 } 5252 5253 if (enable || disable) { 5254 status = video_outputsw_get(); 5255 if (status < 0) 5256 return status; 5257 res = video_outputsw_set((status & ~disable) | enable); 5258 if (res) 5259 return res; 5260 } 5261 5262 return 0; 5263 } 5264 5265 static struct ibm_struct video_driver_data = { 5266 .name = "video", 5267 .read = video_read, 5268 .write = video_write, 5269 .exit = video_exit, 5270 }; 5271 5272 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5273 5274 /************************************************************************* 5275 * Keyboard backlight subdriver 5276 */ 5277 5278 static enum led_brightness kbdlight_brightness; 5279 static DEFINE_MUTEX(kbdlight_mutex); 5280 5281 static int kbdlight_set_level(int level) 5282 { 5283 int ret = 0; 5284 5285 if (!hkey_handle) 5286 return -ENXIO; 5287 5288 mutex_lock(&kbdlight_mutex); 5289 5290 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5291 ret = -EIO; 5292 else 5293 kbdlight_brightness = level; 5294 5295 mutex_unlock(&kbdlight_mutex); 5296 5297 return ret; 5298 } 5299 5300 static int kbdlight_get_level(void) 5301 { 5302 int status = 0; 5303 5304 if (!hkey_handle) 5305 return -ENXIO; 5306 5307 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5308 return -EIO; 5309 5310 if (status < 0) 5311 return status; 5312 5313 return status & 0x3; 5314 } 5315 5316 static bool kbdlight_is_supported(void) 5317 { 5318 int status = 0; 5319 5320 if (!hkey_handle) 5321 return false; 5322 5323 if (!acpi_has_method(hkey_handle, "MLCG")) { 5324 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5325 return false; 5326 } 5327 5328 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5329 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5330 return false; 5331 } 5332 5333 if (status < 0) { 5334 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5335 return false; 5336 } 5337 5338 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5339 /* 5340 * Guessed test for keyboard backlight: 5341 * 5342 * Machines with backlight keyboard return: 5343 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5344 * b110100010010000000XX - ThinkPad x230 5345 * b010100000010000000XX - ThinkPad x240 5346 * b010100000010000000XX - ThinkPad W541 5347 * (XX is current backlight level) 5348 * 5349 * Machines without backlight keyboard return: 5350 * b10100001000000000000 - ThinkPad x230 5351 * b10110001000000000000 - ThinkPad E430 5352 * b00000000000000000000 - ThinkPad E450 5353 * 5354 * Candidate BITs for detection test (XOR): 5355 * b01000000001000000000 5356 * ^ 5357 */ 5358 return status & BIT(9); 5359 } 5360 5361 static int kbdlight_sysfs_set(struct led_classdev *led_cdev, 5362 enum led_brightness brightness) 5363 { 5364 return kbdlight_set_level(brightness); 5365 } 5366 5367 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5368 { 5369 int level; 5370 5371 level = kbdlight_get_level(); 5372 if (level < 0) 5373 return 0; 5374 5375 return level; 5376 } 5377 5378 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5379 .led_classdev = { 5380 .name = "tpacpi::kbd_backlight", 5381 .max_brightness = 2, 5382 .flags = LED_BRIGHT_HW_CHANGED, 5383 .brightness_set_blocking = &kbdlight_sysfs_set, 5384 .brightness_get = &kbdlight_sysfs_get, 5385 } 5386 }; 5387 5388 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5389 { 5390 int rc; 5391 5392 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5393 5394 TPACPI_ACPIHANDLE_INIT(hkey); 5395 5396 if (!kbdlight_is_supported()) { 5397 tp_features.kbdlight = 0; 5398 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5399 return 1; 5400 } 5401 5402 kbdlight_brightness = kbdlight_sysfs_get(NULL); 5403 tp_features.kbdlight = 1; 5404 5405 rc = led_classdev_register(&tpacpi_pdev->dev, 5406 &tpacpi_led_kbdlight.led_classdev); 5407 if (rc < 0) { 5408 tp_features.kbdlight = 0; 5409 return rc; 5410 } 5411 5412 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask | 5413 TP_ACPI_HKEY_KBD_LIGHT_MASK); 5414 return 0; 5415 } 5416 5417 static void kbdlight_exit(void) 5418 { 5419 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5420 } 5421 5422 static int kbdlight_set_level_and_update(int level) 5423 { 5424 int ret; 5425 struct led_classdev *led_cdev; 5426 5427 ret = kbdlight_set_level(level); 5428 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5429 5430 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5431 led_cdev->brightness = level; 5432 5433 return ret; 5434 } 5435 5436 static int kbdlight_read(struct seq_file *m) 5437 { 5438 int level; 5439 5440 if (!tp_features.kbdlight) { 5441 seq_printf(m, "status:\t\tnot supported\n"); 5442 } else { 5443 level = kbdlight_get_level(); 5444 if (level < 0) 5445 seq_printf(m, "status:\t\terror %d\n", level); 5446 else 5447 seq_printf(m, "status:\t\t%d\n", level); 5448 seq_printf(m, "commands:\t0, 1, 2\n"); 5449 } 5450 5451 return 0; 5452 } 5453 5454 static int kbdlight_write(char *buf) 5455 { 5456 char *cmd; 5457 int res, level = -EINVAL; 5458 5459 if (!tp_features.kbdlight) 5460 return -ENODEV; 5461 5462 while ((cmd = strsep(&buf, ","))) { 5463 res = kstrtoint(cmd, 10, &level); 5464 if (res < 0) 5465 return res; 5466 } 5467 5468 if (level >= 3 || level < 0) 5469 return -EINVAL; 5470 5471 return kbdlight_set_level_and_update(level); 5472 } 5473 5474 static void kbdlight_suspend(void) 5475 { 5476 struct led_classdev *led_cdev; 5477 5478 if (!tp_features.kbdlight) 5479 return; 5480 5481 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5482 led_update_brightness(led_cdev); 5483 led_classdev_suspend(led_cdev); 5484 } 5485 5486 static void kbdlight_resume(void) 5487 { 5488 if (!tp_features.kbdlight) 5489 return; 5490 5491 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5492 } 5493 5494 static struct ibm_struct kbdlight_driver_data = { 5495 .name = "kbdlight", 5496 .read = kbdlight_read, 5497 .write = kbdlight_write, 5498 .suspend = kbdlight_suspend, 5499 .resume = kbdlight_resume, 5500 .exit = kbdlight_exit, 5501 }; 5502 5503 /************************************************************************* 5504 * Light (thinklight) subdriver 5505 */ 5506 5507 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5508 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5509 5510 static int light_get_status(void) 5511 { 5512 int status = 0; 5513 5514 if (tp_features.light_status) { 5515 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5516 return -EIO; 5517 return (!!status); 5518 } 5519 5520 return -ENXIO; 5521 } 5522 5523 static int light_set_status(int status) 5524 { 5525 int rc; 5526 5527 if (tp_features.light) { 5528 if (cmos_handle) { 5529 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5530 (status) ? 5531 TP_CMOS_THINKLIGHT_ON : 5532 TP_CMOS_THINKLIGHT_OFF); 5533 } else { 5534 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5535 (status) ? 1 : 0); 5536 } 5537 return (rc) ? 0 : -EIO; 5538 } 5539 5540 return -ENXIO; 5541 } 5542 5543 static int light_sysfs_set(struct led_classdev *led_cdev, 5544 enum led_brightness brightness) 5545 { 5546 return light_set_status((brightness != LED_OFF) ? 5547 TPACPI_LED_ON : TPACPI_LED_OFF); 5548 } 5549 5550 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5551 { 5552 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5553 } 5554 5555 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5556 .led_classdev = { 5557 .name = "tpacpi::thinklight", 5558 .brightness_set_blocking = &light_sysfs_set, 5559 .brightness_get = &light_sysfs_get, 5560 } 5561 }; 5562 5563 static int __init light_init(struct ibm_init_struct *iibm) 5564 { 5565 int rc; 5566 5567 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5568 5569 if (tpacpi_is_ibm()) { 5570 TPACPI_ACPIHANDLE_INIT(ledb); 5571 TPACPI_ACPIHANDLE_INIT(lght); 5572 } 5573 TPACPI_ACPIHANDLE_INIT(cmos); 5574 5575 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5576 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5577 5578 if (tp_features.light) 5579 /* light status not supported on 5580 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5581 tp_features.light_status = 5582 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5583 5584 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5585 str_supported(tp_features.light), 5586 str_supported(tp_features.light_status)); 5587 5588 if (!tp_features.light) 5589 return 1; 5590 5591 rc = led_classdev_register(&tpacpi_pdev->dev, 5592 &tpacpi_led_thinklight.led_classdev); 5593 5594 if (rc < 0) { 5595 tp_features.light = 0; 5596 tp_features.light_status = 0; 5597 } else { 5598 rc = 0; 5599 } 5600 5601 return rc; 5602 } 5603 5604 static void light_exit(void) 5605 { 5606 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5607 } 5608 5609 static int light_read(struct seq_file *m) 5610 { 5611 int status; 5612 5613 if (!tp_features.light) { 5614 seq_printf(m, "status:\t\tnot supported\n"); 5615 } else if (!tp_features.light_status) { 5616 seq_printf(m, "status:\t\tunknown\n"); 5617 seq_printf(m, "commands:\ton, off\n"); 5618 } else { 5619 status = light_get_status(); 5620 if (status < 0) 5621 return status; 5622 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5623 seq_printf(m, "commands:\ton, off\n"); 5624 } 5625 5626 return 0; 5627 } 5628 5629 static int light_write(char *buf) 5630 { 5631 char *cmd; 5632 int newstatus = 0; 5633 5634 if (!tp_features.light) 5635 return -ENODEV; 5636 5637 while ((cmd = strsep(&buf, ","))) { 5638 if (strlencmp(cmd, "on") == 0) { 5639 newstatus = 1; 5640 } else if (strlencmp(cmd, "off") == 0) { 5641 newstatus = 0; 5642 } else 5643 return -EINVAL; 5644 } 5645 5646 return light_set_status(newstatus); 5647 } 5648 5649 static struct ibm_struct light_driver_data = { 5650 .name = "light", 5651 .read = light_read, 5652 .write = light_write, 5653 .exit = light_exit, 5654 }; 5655 5656 /************************************************************************* 5657 * CMOS subdriver 5658 */ 5659 5660 /* sysfs cmos_command -------------------------------------------------- */ 5661 static ssize_t cmos_command_store(struct device *dev, 5662 struct device_attribute *attr, 5663 const char *buf, size_t count) 5664 { 5665 unsigned long cmos_cmd; 5666 int res; 5667 5668 if (parse_strtoul(buf, 21, &cmos_cmd)) 5669 return -EINVAL; 5670 5671 res = issue_thinkpad_cmos_command(cmos_cmd); 5672 return (res) ? res : count; 5673 } 5674 5675 static DEVICE_ATTR_WO(cmos_command); 5676 5677 /* --------------------------------------------------------------------- */ 5678 5679 static int __init cmos_init(struct ibm_init_struct *iibm) 5680 { 5681 int res; 5682 5683 vdbg_printk(TPACPI_DBG_INIT, 5684 "initializing cmos commands subdriver\n"); 5685 5686 TPACPI_ACPIHANDLE_INIT(cmos); 5687 5688 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5689 str_supported(cmos_handle != NULL)); 5690 5691 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5692 if (res) 5693 return res; 5694 5695 return (cmos_handle) ? 0 : 1; 5696 } 5697 5698 static void cmos_exit(void) 5699 { 5700 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5701 } 5702 5703 static int cmos_read(struct seq_file *m) 5704 { 5705 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5706 R30, R31, T20-22, X20-21 */ 5707 if (!cmos_handle) 5708 seq_printf(m, "status:\t\tnot supported\n"); 5709 else { 5710 seq_printf(m, "status:\t\tsupported\n"); 5711 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5712 } 5713 5714 return 0; 5715 } 5716 5717 static int cmos_write(char *buf) 5718 { 5719 char *cmd; 5720 int cmos_cmd, res; 5721 5722 while ((cmd = strsep(&buf, ","))) { 5723 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5724 cmos_cmd >= 0 && cmos_cmd <= 21) { 5725 /* cmos_cmd set */ 5726 } else 5727 return -EINVAL; 5728 5729 res = issue_thinkpad_cmos_command(cmos_cmd); 5730 if (res) 5731 return res; 5732 } 5733 5734 return 0; 5735 } 5736 5737 static struct ibm_struct cmos_driver_data = { 5738 .name = "cmos", 5739 .read = cmos_read, 5740 .write = cmos_write, 5741 .exit = cmos_exit, 5742 }; 5743 5744 /************************************************************************* 5745 * LED subdriver 5746 */ 5747 5748 enum led_access_mode { 5749 TPACPI_LED_NONE = 0, 5750 TPACPI_LED_570, /* 570 */ 5751 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5752 TPACPI_LED_NEW, /* all others */ 5753 }; 5754 5755 enum { /* For TPACPI_LED_OLD */ 5756 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5757 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5758 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5759 }; 5760 5761 static enum led_access_mode led_supported; 5762 5763 static acpi_handle led_handle; 5764 5765 #define TPACPI_LED_NUMLEDS 16 5766 static struct tpacpi_led_classdev *tpacpi_leds; 5767 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5768 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5769 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5770 "tpacpi::power", 5771 "tpacpi:orange:batt", 5772 "tpacpi:green:batt", 5773 "tpacpi::dock_active", 5774 "tpacpi::bay_active", 5775 "tpacpi::dock_batt", 5776 "tpacpi::unknown_led", 5777 "tpacpi::standby", 5778 "tpacpi::dock_status1", 5779 "tpacpi::dock_status2", 5780 "tpacpi::unknown_led2", 5781 "tpacpi::unknown_led3", 5782 "tpacpi::thinkvantage", 5783 }; 5784 #define TPACPI_SAFE_LEDS 0x1081U 5785 5786 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5787 { 5788 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5789 return false; 5790 #else 5791 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5792 #endif 5793 } 5794 5795 static int led_get_status(const unsigned int led) 5796 { 5797 int status; 5798 enum led_status_t led_s; 5799 5800 switch (led_supported) { 5801 case TPACPI_LED_570: 5802 if (!acpi_evalf(ec_handle, 5803 &status, "GLED", "dd", 1 << led)) 5804 return -EIO; 5805 led_s = (status == 0) ? 5806 TPACPI_LED_OFF : 5807 ((status == 1) ? 5808 TPACPI_LED_ON : 5809 TPACPI_LED_BLINK); 5810 tpacpi_led_state_cache[led] = led_s; 5811 return led_s; 5812 default: 5813 return -ENXIO; 5814 } 5815 5816 /* not reached */ 5817 } 5818 5819 static int led_set_status(const unsigned int led, 5820 const enum led_status_t ledstatus) 5821 { 5822 /* off, on, blink. Index is led_status_t */ 5823 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5824 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5825 5826 int rc = 0; 5827 5828 switch (led_supported) { 5829 case TPACPI_LED_570: 5830 /* 570 */ 5831 if (unlikely(led > 7)) 5832 return -EINVAL; 5833 if (unlikely(tpacpi_is_led_restricted(led))) 5834 return -EPERM; 5835 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5836 (1 << led), led_sled_arg1[ledstatus])) 5837 return -EIO; 5838 break; 5839 case TPACPI_LED_OLD: 5840 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5841 if (unlikely(led > 7)) 5842 return -EINVAL; 5843 if (unlikely(tpacpi_is_led_restricted(led))) 5844 return -EPERM; 5845 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5846 if (rc >= 0) 5847 rc = ec_write(TPACPI_LED_EC_HLBL, 5848 (ledstatus == TPACPI_LED_BLINK) << led); 5849 if (rc >= 0) 5850 rc = ec_write(TPACPI_LED_EC_HLCL, 5851 (ledstatus != TPACPI_LED_OFF) << led); 5852 break; 5853 case TPACPI_LED_NEW: 5854 /* all others */ 5855 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5856 return -EINVAL; 5857 if (unlikely(tpacpi_is_led_restricted(led))) 5858 return -EPERM; 5859 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5860 led, led_led_arg1[ledstatus])) 5861 return -EIO; 5862 break; 5863 default: 5864 return -ENXIO; 5865 } 5866 5867 if (!rc) 5868 tpacpi_led_state_cache[led] = ledstatus; 5869 5870 return rc; 5871 } 5872 5873 static int led_sysfs_set(struct led_classdev *led_cdev, 5874 enum led_brightness brightness) 5875 { 5876 struct tpacpi_led_classdev *data = container_of(led_cdev, 5877 struct tpacpi_led_classdev, led_classdev); 5878 enum led_status_t new_state; 5879 5880 if (brightness == LED_OFF) 5881 new_state = TPACPI_LED_OFF; 5882 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5883 new_state = TPACPI_LED_ON; 5884 else 5885 new_state = TPACPI_LED_BLINK; 5886 5887 return led_set_status(data->led, new_state); 5888 } 5889 5890 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5891 unsigned long *delay_on, unsigned long *delay_off) 5892 { 5893 struct tpacpi_led_classdev *data = container_of(led_cdev, 5894 struct tpacpi_led_classdev, led_classdev); 5895 5896 /* Can we choose the flash rate? */ 5897 if (*delay_on == 0 && *delay_off == 0) { 5898 /* yes. set them to the hardware blink rate (1 Hz) */ 5899 *delay_on = 500; /* ms */ 5900 *delay_off = 500; /* ms */ 5901 } else if ((*delay_on != 500) || (*delay_off != 500)) 5902 return -EINVAL; 5903 5904 return led_set_status(data->led, TPACPI_LED_BLINK); 5905 } 5906 5907 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5908 { 5909 int rc; 5910 5911 struct tpacpi_led_classdev *data = container_of(led_cdev, 5912 struct tpacpi_led_classdev, led_classdev); 5913 5914 rc = led_get_status(data->led); 5915 5916 if (rc == TPACPI_LED_OFF || rc < 0) 5917 rc = LED_OFF; /* no error handling in led class :( */ 5918 else 5919 rc = LED_FULL; 5920 5921 return rc; 5922 } 5923 5924 static void led_exit(void) 5925 { 5926 unsigned int i; 5927 5928 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) 5929 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5930 5931 kfree(tpacpi_leds); 5932 } 5933 5934 static int __init tpacpi_init_led(unsigned int led) 5935 { 5936 /* LEDs with no name don't get registered */ 5937 if (!tpacpi_led_names[led]) 5938 return 0; 5939 5940 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set; 5941 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5942 if (led_supported == TPACPI_LED_570) 5943 tpacpi_leds[led].led_classdev.brightness_get = &led_sysfs_get; 5944 5945 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5946 tpacpi_leds[led].led = led; 5947 5948 return led_classdev_register(&tpacpi_pdev->dev, &tpacpi_leds[led].led_classdev); 5949 } 5950 5951 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5952 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5953 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5954 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5955 5956 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5957 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5958 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5959 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5960 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5961 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5962 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5963 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5964 5965 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5966 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5967 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5968 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5969 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5970 5971 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5972 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5973 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5974 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5975 5976 /* (1) - may have excess leds enabled on MSB */ 5977 5978 /* Defaults (order matters, keep last, don't reorder!) */ 5979 { /* Lenovo */ 5980 .vendor = PCI_VENDOR_ID_LENOVO, 5981 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5982 .quirks = 0x1fffU, 5983 }, 5984 { /* IBM ThinkPads with no EC version string */ 5985 .vendor = PCI_VENDOR_ID_IBM, 5986 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5987 .quirks = 0x00ffU, 5988 }, 5989 { /* IBM ThinkPads with EC version string */ 5990 .vendor = PCI_VENDOR_ID_IBM, 5991 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5992 .quirks = 0x00bfU, 5993 }, 5994 }; 5995 5996 static enum led_access_mode __init led_init_detect_mode(void) 5997 { 5998 acpi_status status; 5999 6000 if (tpacpi_is_ibm()) { 6001 /* 570 */ 6002 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 6003 if (ACPI_SUCCESS(status)) 6004 return TPACPI_LED_570; 6005 6006 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 6007 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 6008 if (ACPI_SUCCESS(status)) 6009 return TPACPI_LED_OLD; 6010 } 6011 6012 /* most others */ 6013 status = acpi_get_handle(ec_handle, "LED", &led_handle); 6014 if (ACPI_SUCCESS(status)) 6015 return TPACPI_LED_NEW; 6016 6017 /* R30, R31, and unknown firmwares */ 6018 led_handle = NULL; 6019 return TPACPI_LED_NONE; 6020 } 6021 6022 static int __init led_init(struct ibm_init_struct *iibm) 6023 { 6024 unsigned int i; 6025 int rc; 6026 unsigned long useful_leds; 6027 6028 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 6029 6030 led_supported = led_init_detect_mode(); 6031 6032 if (led_supported != TPACPI_LED_NONE) { 6033 useful_leds = tpacpi_check_quirks(led_useful_qtable, 6034 ARRAY_SIZE(led_useful_qtable)); 6035 6036 if (!useful_leds) { 6037 led_handle = NULL; 6038 led_supported = TPACPI_LED_NONE; 6039 } 6040 } 6041 6042 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 6043 str_supported(led_supported), led_supported); 6044 6045 if (led_supported == TPACPI_LED_NONE) 6046 return 1; 6047 6048 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds), 6049 GFP_KERNEL); 6050 if (!tpacpi_leds) { 6051 pr_err("Out of memory for LED data\n"); 6052 return -ENOMEM; 6053 } 6054 6055 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 6056 tpacpi_leds[i].led = -1; 6057 6058 if (!tpacpi_is_led_restricted(i) && test_bit(i, &useful_leds)) { 6059 rc = tpacpi_init_led(i); 6060 if (rc < 0) { 6061 led_exit(); 6062 return rc; 6063 } 6064 } 6065 } 6066 6067 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 6068 pr_notice("warning: userspace override of important firmware LEDs is enabled\n"); 6069 #endif 6070 return 0; 6071 } 6072 6073 #define str_led_status(s) \ 6074 ((s) == TPACPI_LED_OFF ? "off" : \ 6075 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 6076 6077 static int led_read(struct seq_file *m) 6078 { 6079 if (!led_supported) { 6080 seq_printf(m, "status:\t\tnot supported\n"); 6081 return 0; 6082 } 6083 seq_printf(m, "status:\t\tsupported\n"); 6084 6085 if (led_supported == TPACPI_LED_570) { 6086 /* 570 */ 6087 int i, status; 6088 for (i = 0; i < 8; i++) { 6089 status = led_get_status(i); 6090 if (status < 0) 6091 return -EIO; 6092 seq_printf(m, "%d:\t\t%s\n", 6093 i, str_led_status(status)); 6094 } 6095 } 6096 6097 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 6098 6099 return 0; 6100 } 6101 6102 static int led_write(char *buf) 6103 { 6104 char *cmd; 6105 int led, rc; 6106 enum led_status_t s; 6107 6108 if (!led_supported) 6109 return -ENODEV; 6110 6111 while ((cmd = strsep(&buf, ","))) { 6112 if (sscanf(cmd, "%d", &led) != 1) 6113 return -EINVAL; 6114 6115 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1)) 6116 return -ENODEV; 6117 6118 if (tpacpi_leds[led].led < 0) 6119 return -ENODEV; 6120 6121 if (strstr(cmd, "off")) { 6122 s = TPACPI_LED_OFF; 6123 } else if (strstr(cmd, "on")) { 6124 s = TPACPI_LED_ON; 6125 } else if (strstr(cmd, "blink")) { 6126 s = TPACPI_LED_BLINK; 6127 } else { 6128 return -EINVAL; 6129 } 6130 6131 rc = led_set_status(led, s); 6132 if (rc < 0) 6133 return rc; 6134 } 6135 6136 return 0; 6137 } 6138 6139 static struct ibm_struct led_driver_data = { 6140 .name = "led", 6141 .read = led_read, 6142 .write = led_write, 6143 .exit = led_exit, 6144 }; 6145 6146 /************************************************************************* 6147 * Beep subdriver 6148 */ 6149 6150 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 6151 6152 #define TPACPI_BEEP_Q1 0x0001 6153 6154 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 6155 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 6156 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 6157 }; 6158 6159 static int __init beep_init(struct ibm_init_struct *iibm) 6160 { 6161 unsigned long quirks; 6162 6163 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 6164 6165 TPACPI_ACPIHANDLE_INIT(beep); 6166 6167 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 6168 str_supported(beep_handle != NULL)); 6169 6170 quirks = tpacpi_check_quirks(beep_quirk_table, 6171 ARRAY_SIZE(beep_quirk_table)); 6172 6173 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6174 6175 return (beep_handle) ? 0 : 1; 6176 } 6177 6178 static int beep_read(struct seq_file *m) 6179 { 6180 if (!beep_handle) 6181 seq_printf(m, "status:\t\tnot supported\n"); 6182 else { 6183 seq_printf(m, "status:\t\tsupported\n"); 6184 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6185 } 6186 6187 return 0; 6188 } 6189 6190 static int beep_write(char *buf) 6191 { 6192 char *cmd; 6193 int beep_cmd; 6194 6195 if (!beep_handle) 6196 return -ENODEV; 6197 6198 while ((cmd = strsep(&buf, ","))) { 6199 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6200 beep_cmd >= 0 && beep_cmd <= 17) { 6201 /* beep_cmd set */ 6202 } else 6203 return -EINVAL; 6204 if (tp_features.beep_needs_two_args) { 6205 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6206 beep_cmd, 0)) 6207 return -EIO; 6208 } else { 6209 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6210 beep_cmd)) 6211 return -EIO; 6212 } 6213 } 6214 6215 return 0; 6216 } 6217 6218 static struct ibm_struct beep_driver_data = { 6219 .name = "beep", 6220 .read = beep_read, 6221 .write = beep_write, 6222 }; 6223 6224 /************************************************************************* 6225 * Thermal subdriver 6226 */ 6227 6228 enum thermal_access_mode { 6229 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6230 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6231 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6232 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6233 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6234 }; 6235 6236 enum { /* TPACPI_THERMAL_TPEC_* */ 6237 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6238 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6239 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6240 6241 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6242 }; 6243 6244 6245 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6246 struct ibm_thermal_sensors_struct { 6247 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6248 }; 6249 6250 static enum thermal_access_mode thermal_read_mode; 6251 6252 /* idx is zero-based */ 6253 static int thermal_get_sensor(int idx, s32 *value) 6254 { 6255 int t; 6256 s8 tmp; 6257 char tmpi[5]; 6258 6259 t = TP_EC_THERMAL_TMP0; 6260 6261 switch (thermal_read_mode) { 6262 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6263 case TPACPI_THERMAL_TPEC_16: 6264 if (idx >= 8 && idx <= 15) { 6265 t = TP_EC_THERMAL_TMP8; 6266 idx -= 8; 6267 } 6268 #endif 6269 /* fallthrough */ 6270 case TPACPI_THERMAL_TPEC_8: 6271 if (idx <= 7) { 6272 if (!acpi_ec_read(t + idx, &tmp)) 6273 return -EIO; 6274 *value = tmp * 1000; 6275 return 0; 6276 } 6277 break; 6278 6279 case TPACPI_THERMAL_ACPI_UPDT: 6280 if (idx <= 7) { 6281 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6282 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6283 return -EIO; 6284 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6285 return -EIO; 6286 *value = (t - 2732) * 100; 6287 return 0; 6288 } 6289 break; 6290 6291 case TPACPI_THERMAL_ACPI_TMP07: 6292 if (idx <= 7) { 6293 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6294 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6295 return -EIO; 6296 if (t > 127 || t < -127) 6297 t = TP_EC_THERMAL_TMP_NA; 6298 *value = t * 1000; 6299 return 0; 6300 } 6301 break; 6302 6303 case TPACPI_THERMAL_NONE: 6304 default: 6305 return -ENOSYS; 6306 } 6307 6308 return -EINVAL; 6309 } 6310 6311 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6312 { 6313 int res, i; 6314 int n; 6315 6316 n = 8; 6317 i = 0; 6318 6319 if (!s) 6320 return -EINVAL; 6321 6322 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6323 n = 16; 6324 6325 for (i = 0 ; i < n; i++) { 6326 res = thermal_get_sensor(i, &s->temp[i]); 6327 if (res) 6328 return res; 6329 } 6330 6331 return n; 6332 } 6333 6334 static void thermal_dump_all_sensors(void) 6335 { 6336 int n, i; 6337 struct ibm_thermal_sensors_struct t; 6338 6339 n = thermal_get_sensors(&t); 6340 if (n <= 0) 6341 return; 6342 6343 pr_notice("temperatures (Celsius):"); 6344 6345 for (i = 0; i < n; i++) { 6346 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6347 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6348 else 6349 pr_cont(" N/A"); 6350 } 6351 6352 pr_cont("\n"); 6353 } 6354 6355 /* sysfs temp##_input -------------------------------------------------- */ 6356 6357 static ssize_t thermal_temp_input_show(struct device *dev, 6358 struct device_attribute *attr, 6359 char *buf) 6360 { 6361 struct sensor_device_attribute *sensor_attr = 6362 to_sensor_dev_attr(attr); 6363 int idx = sensor_attr->index; 6364 s32 value; 6365 int res; 6366 6367 res = thermal_get_sensor(idx, &value); 6368 if (res) 6369 return res; 6370 if (value == TPACPI_THERMAL_SENSOR_NA) 6371 return -ENXIO; 6372 6373 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6374 } 6375 6376 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6377 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6378 thermal_temp_input_show, NULL, _idxB) 6379 6380 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6381 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6382 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6383 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6384 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6385 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6386 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6387 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6388 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6389 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6390 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6391 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6392 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6393 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6394 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6395 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6396 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6397 }; 6398 6399 #define THERMAL_ATTRS(X) \ 6400 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6401 6402 static struct attribute *thermal_temp_input_attr[] = { 6403 THERMAL_ATTRS(8), 6404 THERMAL_ATTRS(9), 6405 THERMAL_ATTRS(10), 6406 THERMAL_ATTRS(11), 6407 THERMAL_ATTRS(12), 6408 THERMAL_ATTRS(13), 6409 THERMAL_ATTRS(14), 6410 THERMAL_ATTRS(15), 6411 THERMAL_ATTRS(0), 6412 THERMAL_ATTRS(1), 6413 THERMAL_ATTRS(2), 6414 THERMAL_ATTRS(3), 6415 THERMAL_ATTRS(4), 6416 THERMAL_ATTRS(5), 6417 THERMAL_ATTRS(6), 6418 THERMAL_ATTRS(7), 6419 NULL 6420 }; 6421 6422 static const struct attribute_group thermal_temp_input16_group = { 6423 .attrs = thermal_temp_input_attr 6424 }; 6425 6426 static const struct attribute_group thermal_temp_input8_group = { 6427 .attrs = &thermal_temp_input_attr[8] 6428 }; 6429 6430 #undef THERMAL_SENSOR_ATTR_TEMP 6431 #undef THERMAL_ATTRS 6432 6433 /* --------------------------------------------------------------------- */ 6434 6435 static int __init thermal_init(struct ibm_init_struct *iibm) 6436 { 6437 u8 t, ta1, ta2; 6438 int i; 6439 int acpi_tmp7; 6440 int res; 6441 6442 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6443 6444 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6445 6446 if (thinkpad_id.ec_model) { 6447 /* 6448 * Direct EC access mode: sensors at registers 6449 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6450 * non-implemented, thermal sensors return 0x80 when 6451 * not available 6452 */ 6453 6454 ta1 = ta2 = 0; 6455 for (i = 0; i < 8; i++) { 6456 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6457 ta1 |= t; 6458 } else { 6459 ta1 = 0; 6460 break; 6461 } 6462 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6463 ta2 |= t; 6464 } else { 6465 ta1 = 0; 6466 break; 6467 } 6468 } 6469 if (ta1 == 0) { 6470 /* This is sheer paranoia, but we handle it anyway */ 6471 if (acpi_tmp7) { 6472 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n"); 6473 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6474 } else { 6475 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n"); 6476 thermal_read_mode = TPACPI_THERMAL_NONE; 6477 } 6478 } else { 6479 thermal_read_mode = 6480 (ta2 != 0) ? 6481 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6482 } 6483 } else if (acpi_tmp7) { 6484 if (tpacpi_is_ibm() && 6485 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6486 /* 600e/x, 770e, 770x */ 6487 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6488 } else { 6489 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6490 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6491 } 6492 } else { 6493 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6494 thermal_read_mode = TPACPI_THERMAL_NONE; 6495 } 6496 6497 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6498 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6499 thermal_read_mode); 6500 6501 switch (thermal_read_mode) { 6502 case TPACPI_THERMAL_TPEC_16: 6503 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6504 &thermal_temp_input16_group); 6505 if (res) 6506 return res; 6507 break; 6508 case TPACPI_THERMAL_TPEC_8: 6509 case TPACPI_THERMAL_ACPI_TMP07: 6510 case TPACPI_THERMAL_ACPI_UPDT: 6511 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6512 &thermal_temp_input8_group); 6513 if (res) 6514 return res; 6515 break; 6516 case TPACPI_THERMAL_NONE: 6517 default: 6518 return 1; 6519 } 6520 6521 return 0; 6522 } 6523 6524 static void thermal_exit(void) 6525 { 6526 switch (thermal_read_mode) { 6527 case TPACPI_THERMAL_TPEC_16: 6528 sysfs_remove_group(&tpacpi_hwmon->kobj, 6529 &thermal_temp_input16_group); 6530 break; 6531 case TPACPI_THERMAL_TPEC_8: 6532 case TPACPI_THERMAL_ACPI_TMP07: 6533 case TPACPI_THERMAL_ACPI_UPDT: 6534 sysfs_remove_group(&tpacpi_hwmon->kobj, 6535 &thermal_temp_input8_group); 6536 break; 6537 case TPACPI_THERMAL_NONE: 6538 default: 6539 break; 6540 } 6541 } 6542 6543 static int thermal_read(struct seq_file *m) 6544 { 6545 int n, i; 6546 struct ibm_thermal_sensors_struct t; 6547 6548 n = thermal_get_sensors(&t); 6549 if (unlikely(n < 0)) 6550 return n; 6551 6552 seq_printf(m, "temperatures:\t"); 6553 6554 if (n > 0) { 6555 for (i = 0; i < (n - 1); i++) 6556 seq_printf(m, "%d ", t.temp[i] / 1000); 6557 seq_printf(m, "%d\n", t.temp[i] / 1000); 6558 } else 6559 seq_printf(m, "not supported\n"); 6560 6561 return 0; 6562 } 6563 6564 static struct ibm_struct thermal_driver_data = { 6565 .name = "thermal", 6566 .read = thermal_read, 6567 .exit = thermal_exit, 6568 }; 6569 6570 /************************************************************************* 6571 * Backlight/brightness subdriver 6572 */ 6573 6574 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6575 6576 /* 6577 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6578 * CMOS NVRAM byte 0x5E, bits 0-3. 6579 * 6580 * EC HBRV (0x31) has the following layout 6581 * Bit 7: unknown function 6582 * Bit 6: unknown function 6583 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6584 * Bit 4: must be set to zero to avoid problems 6585 * Bit 3-0: backlight brightness level 6586 * 6587 * brightness_get_raw returns status data in the HBRV layout 6588 * 6589 * WARNING: The X61 has been verified to use HBRV for something else, so 6590 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6591 * testing on the very early *60 Lenovo models... 6592 */ 6593 6594 enum { 6595 TP_EC_BACKLIGHT = 0x31, 6596 6597 /* TP_EC_BACKLIGHT bitmasks */ 6598 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6599 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6600 TP_EC_BACKLIGHT_MAPSW = 0x20, 6601 }; 6602 6603 enum tpacpi_brightness_access_mode { 6604 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6605 TPACPI_BRGHT_MODE_EC, /* EC control */ 6606 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6607 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6608 TPACPI_BRGHT_MODE_MAX 6609 }; 6610 6611 static struct backlight_device *ibm_backlight_device; 6612 6613 static enum tpacpi_brightness_access_mode brightness_mode = 6614 TPACPI_BRGHT_MODE_MAX; 6615 6616 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6617 6618 static struct mutex brightness_mutex; 6619 6620 /* NVRAM brightness access, 6621 * call with brightness_mutex held! */ 6622 static unsigned int tpacpi_brightness_nvram_get(void) 6623 { 6624 u8 lnvram; 6625 6626 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6627 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6628 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6629 lnvram &= bright_maxlvl; 6630 6631 return lnvram; 6632 } 6633 6634 static void tpacpi_brightness_checkpoint_nvram(void) 6635 { 6636 u8 lec = 0; 6637 u8 b_nvram; 6638 6639 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6640 return; 6641 6642 vdbg_printk(TPACPI_DBG_BRGHT, 6643 "trying to checkpoint backlight level to NVRAM...\n"); 6644 6645 if (mutex_lock_killable(&brightness_mutex) < 0) 6646 return; 6647 6648 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6649 goto unlock; 6650 lec &= TP_EC_BACKLIGHT_LVLMSK; 6651 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6652 6653 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6654 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6655 /* NVRAM needs update */ 6656 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6657 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6658 b_nvram |= lec; 6659 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6660 dbg_printk(TPACPI_DBG_BRGHT, 6661 "updated NVRAM backlight level to %u (0x%02x)\n", 6662 (unsigned int) lec, (unsigned int) b_nvram); 6663 } else 6664 vdbg_printk(TPACPI_DBG_BRGHT, 6665 "NVRAM backlight level already is %u (0x%02x)\n", 6666 (unsigned int) lec, (unsigned int) b_nvram); 6667 6668 unlock: 6669 mutex_unlock(&brightness_mutex); 6670 } 6671 6672 6673 /* call with brightness_mutex held! */ 6674 static int tpacpi_brightness_get_raw(int *status) 6675 { 6676 u8 lec = 0; 6677 6678 switch (brightness_mode) { 6679 case TPACPI_BRGHT_MODE_UCMS_STEP: 6680 *status = tpacpi_brightness_nvram_get(); 6681 return 0; 6682 case TPACPI_BRGHT_MODE_EC: 6683 case TPACPI_BRGHT_MODE_ECNVRAM: 6684 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6685 return -EIO; 6686 *status = lec; 6687 return 0; 6688 default: 6689 return -ENXIO; 6690 } 6691 } 6692 6693 /* call with brightness_mutex held! */ 6694 /* do NOT call with illegal backlight level value */ 6695 static int tpacpi_brightness_set_ec(unsigned int value) 6696 { 6697 u8 lec = 0; 6698 6699 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6700 return -EIO; 6701 6702 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6703 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6704 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6705 return -EIO; 6706 6707 return 0; 6708 } 6709 6710 /* call with brightness_mutex held! */ 6711 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6712 { 6713 int cmos_cmd, inc; 6714 unsigned int current_value, i; 6715 6716 current_value = tpacpi_brightness_nvram_get(); 6717 6718 if (value == current_value) 6719 return 0; 6720 6721 cmos_cmd = (value > current_value) ? 6722 TP_CMOS_BRIGHTNESS_UP : 6723 TP_CMOS_BRIGHTNESS_DOWN; 6724 inc = (value > current_value) ? 1 : -1; 6725 6726 for (i = current_value; i != value; i += inc) 6727 if (issue_thinkpad_cmos_command(cmos_cmd)) 6728 return -EIO; 6729 6730 return 0; 6731 } 6732 6733 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6734 static int brightness_set(unsigned int value) 6735 { 6736 int res; 6737 6738 if (value > bright_maxlvl) 6739 return -EINVAL; 6740 6741 vdbg_printk(TPACPI_DBG_BRGHT, 6742 "set backlight level to %d\n", value); 6743 6744 res = mutex_lock_killable(&brightness_mutex); 6745 if (res < 0) 6746 return res; 6747 6748 switch (brightness_mode) { 6749 case TPACPI_BRGHT_MODE_EC: 6750 case TPACPI_BRGHT_MODE_ECNVRAM: 6751 res = tpacpi_brightness_set_ec(value); 6752 break; 6753 case TPACPI_BRGHT_MODE_UCMS_STEP: 6754 res = tpacpi_brightness_set_ucmsstep(value); 6755 break; 6756 default: 6757 res = -ENXIO; 6758 } 6759 6760 mutex_unlock(&brightness_mutex); 6761 return res; 6762 } 6763 6764 /* sysfs backlight class ----------------------------------------------- */ 6765 6766 static int brightness_update_status(struct backlight_device *bd) 6767 { 6768 unsigned int level = 6769 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6770 bd->props.power == FB_BLANK_UNBLANK) ? 6771 bd->props.brightness : 0; 6772 6773 dbg_printk(TPACPI_DBG_BRGHT, 6774 "backlight: attempt to set level to %d\n", 6775 level); 6776 6777 /* it is the backlight class's job (caller) to handle 6778 * EINTR and other errors properly */ 6779 return brightness_set(level); 6780 } 6781 6782 static int brightness_get(struct backlight_device *bd) 6783 { 6784 int status, res; 6785 6786 res = mutex_lock_killable(&brightness_mutex); 6787 if (res < 0) 6788 return 0; 6789 6790 res = tpacpi_brightness_get_raw(&status); 6791 6792 mutex_unlock(&brightness_mutex); 6793 6794 if (res < 0) 6795 return 0; 6796 6797 return status & TP_EC_BACKLIGHT_LVLMSK; 6798 } 6799 6800 static void tpacpi_brightness_notify_change(void) 6801 { 6802 backlight_force_update(ibm_backlight_device, 6803 BACKLIGHT_UPDATE_HOTKEY); 6804 } 6805 6806 static const struct backlight_ops ibm_backlight_data = { 6807 .get_brightness = brightness_get, 6808 .update_status = brightness_update_status, 6809 }; 6810 6811 /* --------------------------------------------------------------------- */ 6812 6813 /* 6814 * Call _BCL method of video device. On some ThinkPads this will 6815 * switch the firmware to the ACPI brightness control mode. 6816 */ 6817 6818 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6819 { 6820 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6821 union acpi_object *obj; 6822 struct acpi_device *device, *child; 6823 int rc; 6824 6825 if (acpi_bus_get_device(handle, &device)) 6826 return 0; 6827 6828 rc = 0; 6829 list_for_each_entry(child, &device->children, node) { 6830 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6831 NULL, &buffer); 6832 if (ACPI_FAILURE(status)) 6833 continue; 6834 6835 obj = (union acpi_object *)buffer.pointer; 6836 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6837 pr_err("Unknown _BCL data, please report this to %s\n", 6838 TPACPI_MAIL); 6839 rc = 0; 6840 } else { 6841 rc = obj->package.count; 6842 } 6843 break; 6844 } 6845 6846 kfree(buffer.pointer); 6847 return rc; 6848 } 6849 6850 6851 /* 6852 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6853 */ 6854 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6855 { 6856 acpi_handle video_device; 6857 int bcl_levels = 0; 6858 6859 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6860 if (video_device) 6861 bcl_levels = tpacpi_query_bcl_levels(video_device); 6862 6863 tp_features.bright_acpimode = (bcl_levels > 0); 6864 6865 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6866 } 6867 6868 /* 6869 * These are only useful for models that have only one possibility 6870 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6871 * these quirks. 6872 */ 6873 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6874 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6875 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6876 6877 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6878 /* Models with ATI GPUs known to require ECNVRAM mode */ 6879 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6880 6881 /* Models with ATI GPUs that can use ECNVRAM */ 6882 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6883 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6884 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6885 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6886 6887 /* Models with Intel Extreme Graphics 2 */ 6888 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6889 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6890 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6891 6892 /* Models with Intel GMA900 */ 6893 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6894 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6895 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6896 }; 6897 6898 /* 6899 * Returns < 0 for error, otherwise sets tp_features.bright_* 6900 * and bright_maxlvl. 6901 */ 6902 static void __init tpacpi_detect_brightness_capabilities(void) 6903 { 6904 unsigned int b; 6905 6906 vdbg_printk(TPACPI_DBG_INIT, 6907 "detecting firmware brightness interface capabilities\n"); 6908 6909 /* we could run a quirks check here (same table used by 6910 * brightness_init) if needed */ 6911 6912 /* 6913 * We always attempt to detect acpi support, so as to switch 6914 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6915 * going to publish a backlight interface 6916 */ 6917 b = tpacpi_check_std_acpi_brightness_support(); 6918 switch (b) { 6919 case 16: 6920 bright_maxlvl = 15; 6921 break; 6922 case 8: 6923 case 0: 6924 bright_maxlvl = 7; 6925 break; 6926 default: 6927 tp_features.bright_unkfw = 1; 6928 bright_maxlvl = b - 1; 6929 } 6930 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6931 } 6932 6933 static int __init brightness_init(struct ibm_init_struct *iibm) 6934 { 6935 struct backlight_properties props; 6936 int b; 6937 unsigned long quirks; 6938 6939 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6940 6941 mutex_init(&brightness_mutex); 6942 6943 quirks = tpacpi_check_quirks(brightness_quirk_table, 6944 ARRAY_SIZE(brightness_quirk_table)); 6945 6946 /* tpacpi_detect_brightness_capabilities() must have run already */ 6947 6948 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6949 if (tp_features.bright_unkfw) 6950 return 1; 6951 6952 if (!brightness_enable) { 6953 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6954 "brightness support disabled by module parameter\n"); 6955 return 1; 6956 } 6957 6958 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6959 if (brightness_enable > 1) { 6960 pr_info("Standard ACPI backlight interface available, not loading native one\n"); 6961 return 1; 6962 } else if (brightness_enable == 1) { 6963 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n"); 6964 return 1; 6965 } 6966 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6967 pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n"); 6968 } 6969 6970 /* 6971 * Check for module parameter bogosity, note that we 6972 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6973 * able to detect "unspecified" 6974 */ 6975 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6976 return -EINVAL; 6977 6978 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6979 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6980 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6981 if (quirks & TPACPI_BRGHT_Q_EC) 6982 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6983 else 6984 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6985 6986 dbg_printk(TPACPI_DBG_BRGHT, 6987 "driver auto-selected brightness_mode=%d\n", 6988 brightness_mode); 6989 } 6990 6991 /* Safety */ 6992 if (!tpacpi_is_ibm() && 6993 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6994 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6995 return -EINVAL; 6996 6997 if (tpacpi_brightness_get_raw(&b) < 0) 6998 return 1; 6999 7000 memset(&props, 0, sizeof(struct backlight_properties)); 7001 props.type = BACKLIGHT_PLATFORM; 7002 props.max_brightness = bright_maxlvl; 7003 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 7004 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 7005 NULL, NULL, 7006 &ibm_backlight_data, 7007 &props); 7008 if (IS_ERR(ibm_backlight_device)) { 7009 int rc = PTR_ERR(ibm_backlight_device); 7010 ibm_backlight_device = NULL; 7011 pr_err("Could not register backlight device\n"); 7012 return rc; 7013 } 7014 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7015 "brightness is supported\n"); 7016 7017 if (quirks & TPACPI_BRGHT_Q_ASK) { 7018 pr_notice("brightness: will use unverified default: brightness_mode=%d\n", 7019 brightness_mode); 7020 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n", 7021 TPACPI_MAIL); 7022 } 7023 7024 /* Added by mistake in early 2007. Probably useless, but it could 7025 * be working around some unknown firmware problem where the value 7026 * read at startup doesn't match the real hardware state... so leave 7027 * it in place just in case */ 7028 backlight_update_status(ibm_backlight_device); 7029 7030 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7031 "brightness: registering brightness hotkeys as change notification\n"); 7032 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7033 | TP_ACPI_HKEY_BRGHTUP_MASK 7034 | TP_ACPI_HKEY_BRGHTDWN_MASK); 7035 return 0; 7036 } 7037 7038 static void brightness_suspend(void) 7039 { 7040 tpacpi_brightness_checkpoint_nvram(); 7041 } 7042 7043 static void brightness_shutdown(void) 7044 { 7045 tpacpi_brightness_checkpoint_nvram(); 7046 } 7047 7048 static void brightness_exit(void) 7049 { 7050 if (ibm_backlight_device) { 7051 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 7052 "calling backlight_device_unregister()\n"); 7053 backlight_device_unregister(ibm_backlight_device); 7054 } 7055 7056 tpacpi_brightness_checkpoint_nvram(); 7057 } 7058 7059 static int brightness_read(struct seq_file *m) 7060 { 7061 int level; 7062 7063 level = brightness_get(NULL); 7064 if (level < 0) { 7065 seq_printf(m, "level:\t\tunreadable\n"); 7066 } else { 7067 seq_printf(m, "level:\t\t%d\n", level); 7068 seq_printf(m, "commands:\tup, down\n"); 7069 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7070 bright_maxlvl); 7071 } 7072 7073 return 0; 7074 } 7075 7076 static int brightness_write(char *buf) 7077 { 7078 int level; 7079 int rc; 7080 char *cmd; 7081 7082 level = brightness_get(NULL); 7083 if (level < 0) 7084 return level; 7085 7086 while ((cmd = strsep(&buf, ","))) { 7087 if (strlencmp(cmd, "up") == 0) { 7088 if (level < bright_maxlvl) 7089 level++; 7090 } else if (strlencmp(cmd, "down") == 0) { 7091 if (level > 0) 7092 level--; 7093 } else if (sscanf(cmd, "level %d", &level) == 1 && 7094 level >= 0 && level <= bright_maxlvl) { 7095 /* new level set */ 7096 } else 7097 return -EINVAL; 7098 } 7099 7100 tpacpi_disclose_usertask("procfs brightness", 7101 "set level to %d\n", level); 7102 7103 /* 7104 * Now we know what the final level should be, so we try to set it. 7105 * Doing it this way makes the syscall restartable in case of EINTR 7106 */ 7107 rc = brightness_set(level); 7108 if (!rc && ibm_backlight_device) 7109 backlight_force_update(ibm_backlight_device, 7110 BACKLIGHT_UPDATE_SYSFS); 7111 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7112 } 7113 7114 static struct ibm_struct brightness_driver_data = { 7115 .name = "brightness", 7116 .read = brightness_read, 7117 .write = brightness_write, 7118 .exit = brightness_exit, 7119 .suspend = brightness_suspend, 7120 .shutdown = brightness_shutdown, 7121 }; 7122 7123 /************************************************************************* 7124 * Volume subdriver 7125 */ 7126 7127 /* 7128 * IBM ThinkPads have a simple volume controller with MUTE gating. 7129 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 7130 * 7131 * Since the *61 series (and probably also the later *60 series), Lenovo 7132 * ThinkPads only implement the MUTE gate. 7133 * 7134 * EC register 0x30 7135 * Bit 6: MUTE (1 mutes sound) 7136 * Bit 3-0: Volume 7137 * Other bits should be zero as far as we know. 7138 * 7139 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 7140 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 7141 * such as bit 7 which is used to detect repeated presses of MUTE, 7142 * and we leave them unchanged. 7143 * 7144 * On newer Lenovo ThinkPads, the EC can automatically change the volume 7145 * in response to user input. Unfortunately, this rarely works well. 7146 * The laptop changes the state of its internal MUTE gate and, on some 7147 * models, sends KEY_MUTE, causing any user code that responds to the 7148 * mute button to get confused. The hardware MUTE gate is also 7149 * unnecessary, since user code can handle the mute button without 7150 * kernel or EC help. 7151 * 7152 * To avoid confusing userspace, we simply disable all EC-based mute 7153 * and volume controls when possible. 7154 */ 7155 7156 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 7157 7158 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 7159 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 7160 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7161 7162 #if SNDRV_CARDS <= 32 7163 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7164 #else 7165 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7166 #endif 7167 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7168 static char *alsa_id = "ThinkPadEC"; 7169 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7170 7171 struct tpacpi_alsa_data { 7172 struct snd_card *card; 7173 struct snd_ctl_elem_id *ctl_mute_id; 7174 struct snd_ctl_elem_id *ctl_vol_id; 7175 }; 7176 7177 static struct snd_card *alsa_card; 7178 7179 enum { 7180 TP_EC_AUDIO = 0x30, 7181 7182 /* TP_EC_AUDIO bits */ 7183 TP_EC_AUDIO_MUTESW = 6, 7184 7185 /* TP_EC_AUDIO bitmasks */ 7186 TP_EC_AUDIO_LVL_MSK = 0x0F, 7187 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7188 7189 /* Maximum volume */ 7190 TP_EC_VOLUME_MAX = 14, 7191 }; 7192 7193 enum tpacpi_volume_access_mode { 7194 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7195 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7196 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7197 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7198 TPACPI_VOL_MODE_MAX 7199 }; 7200 7201 enum tpacpi_volume_capabilities { 7202 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7203 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7204 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7205 TPACPI_VOL_CAP_MAX 7206 }; 7207 7208 enum tpacpi_mute_btn_mode { 7209 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7210 /* We don't know what mode 1 is. */ 7211 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7212 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7213 }; 7214 7215 static enum tpacpi_volume_access_mode volume_mode = 7216 TPACPI_VOL_MODE_MAX; 7217 7218 static enum tpacpi_volume_capabilities volume_capabilities; 7219 static bool volume_control_allowed; 7220 static bool software_mute_requested = true; 7221 static bool software_mute_active; 7222 static int software_mute_orig_mode; 7223 7224 /* 7225 * Used to syncronize writers to TP_EC_AUDIO and 7226 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7227 */ 7228 static struct mutex volume_mutex; 7229 7230 static void tpacpi_volume_checkpoint_nvram(void) 7231 { 7232 u8 lec = 0; 7233 u8 b_nvram; 7234 u8 ec_mask; 7235 7236 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7237 return; 7238 if (!volume_control_allowed) 7239 return; 7240 if (software_mute_active) 7241 return; 7242 7243 vdbg_printk(TPACPI_DBG_MIXER, 7244 "trying to checkpoint mixer state to NVRAM...\n"); 7245 7246 if (tp_features.mixer_no_level_control) 7247 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7248 else 7249 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7250 7251 if (mutex_lock_killable(&volume_mutex) < 0) 7252 return; 7253 7254 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7255 goto unlock; 7256 lec &= ec_mask; 7257 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7258 7259 if (lec != (b_nvram & ec_mask)) { 7260 /* NVRAM needs update */ 7261 b_nvram &= ~ec_mask; 7262 b_nvram |= lec; 7263 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7264 dbg_printk(TPACPI_DBG_MIXER, 7265 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7266 (unsigned int) lec, (unsigned int) b_nvram); 7267 } else { 7268 vdbg_printk(TPACPI_DBG_MIXER, 7269 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7270 (unsigned int) lec, (unsigned int) b_nvram); 7271 } 7272 7273 unlock: 7274 mutex_unlock(&volume_mutex); 7275 } 7276 7277 static int volume_get_status_ec(u8 *status) 7278 { 7279 u8 s; 7280 7281 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7282 return -EIO; 7283 7284 *status = s; 7285 7286 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7287 7288 return 0; 7289 } 7290 7291 static int volume_get_status(u8 *status) 7292 { 7293 return volume_get_status_ec(status); 7294 } 7295 7296 static int volume_set_status_ec(const u8 status) 7297 { 7298 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7299 return -EIO; 7300 7301 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7302 7303 /* 7304 * On X200s, and possibly on others, it can take a while for 7305 * reads to become correct. 7306 */ 7307 msleep(1); 7308 7309 return 0; 7310 } 7311 7312 static int volume_set_status(const u8 status) 7313 { 7314 return volume_set_status_ec(status); 7315 } 7316 7317 /* returns < 0 on error, 0 on no change, 1 on change */ 7318 static int __volume_set_mute_ec(const bool mute) 7319 { 7320 int rc; 7321 u8 s, n; 7322 7323 if (mutex_lock_killable(&volume_mutex) < 0) 7324 return -EINTR; 7325 7326 rc = volume_get_status_ec(&s); 7327 if (rc) 7328 goto unlock; 7329 7330 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7331 s & ~TP_EC_AUDIO_MUTESW_MSK; 7332 7333 if (n != s) { 7334 rc = volume_set_status_ec(n); 7335 if (!rc) 7336 rc = 1; 7337 } 7338 7339 unlock: 7340 mutex_unlock(&volume_mutex); 7341 return rc; 7342 } 7343 7344 static int volume_alsa_set_mute(const bool mute) 7345 { 7346 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7347 (mute) ? "" : "un"); 7348 return __volume_set_mute_ec(mute); 7349 } 7350 7351 static int volume_set_mute(const bool mute) 7352 { 7353 int rc; 7354 7355 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7356 (mute) ? "" : "un"); 7357 7358 rc = __volume_set_mute_ec(mute); 7359 return (rc < 0) ? rc : 0; 7360 } 7361 7362 /* returns < 0 on error, 0 on no change, 1 on change */ 7363 static int __volume_set_volume_ec(const u8 vol) 7364 { 7365 int rc; 7366 u8 s, n; 7367 7368 if (vol > TP_EC_VOLUME_MAX) 7369 return -EINVAL; 7370 7371 if (mutex_lock_killable(&volume_mutex) < 0) 7372 return -EINTR; 7373 7374 rc = volume_get_status_ec(&s); 7375 if (rc) 7376 goto unlock; 7377 7378 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7379 7380 if (n != s) { 7381 rc = volume_set_status_ec(n); 7382 if (!rc) 7383 rc = 1; 7384 } 7385 7386 unlock: 7387 mutex_unlock(&volume_mutex); 7388 return rc; 7389 } 7390 7391 static int volume_set_software_mute(bool startup) 7392 { 7393 int result; 7394 7395 if (!tpacpi_is_lenovo()) 7396 return -ENODEV; 7397 7398 if (startup) { 7399 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7400 "HAUM", "qd")) 7401 return -EIO; 7402 7403 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7404 "Initial HAUM setting was %d\n", 7405 software_mute_orig_mode); 7406 } 7407 7408 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7409 (int)TP_EC_MUTE_BTN_NONE)) 7410 return -EIO; 7411 7412 if (result != TP_EC_MUTE_BTN_NONE) 7413 pr_warn("Unexpected SAUM result %d\n", 7414 result); 7415 7416 /* 7417 * In software mute mode, the standard codec controls take 7418 * precendence, so we unmute the ThinkPad HW switch at 7419 * startup. Just on case there are SAUM-capable ThinkPads 7420 * with level controls, set max HW volume as well. 7421 */ 7422 if (tp_features.mixer_no_level_control) 7423 result = volume_set_mute(false); 7424 else 7425 result = volume_set_status(TP_EC_VOLUME_MAX); 7426 7427 if (result != 0) 7428 pr_warn("Failed to unmute the HW mute switch\n"); 7429 7430 return 0; 7431 } 7432 7433 static void volume_exit_software_mute(void) 7434 { 7435 int r; 7436 7437 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7438 || r != software_mute_orig_mode) 7439 pr_warn("Failed to restore mute mode\n"); 7440 } 7441 7442 static int volume_alsa_set_volume(const u8 vol) 7443 { 7444 dbg_printk(TPACPI_DBG_MIXER, 7445 "ALSA: trying to set volume level to %hu\n", vol); 7446 return __volume_set_volume_ec(vol); 7447 } 7448 7449 static void volume_alsa_notify_change(void) 7450 { 7451 struct tpacpi_alsa_data *d; 7452 7453 if (alsa_card && alsa_card->private_data) { 7454 d = alsa_card->private_data; 7455 if (d->ctl_mute_id) 7456 snd_ctl_notify(alsa_card, 7457 SNDRV_CTL_EVENT_MASK_VALUE, 7458 d->ctl_mute_id); 7459 if (d->ctl_vol_id) 7460 snd_ctl_notify(alsa_card, 7461 SNDRV_CTL_EVENT_MASK_VALUE, 7462 d->ctl_vol_id); 7463 } 7464 } 7465 7466 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7467 struct snd_ctl_elem_info *uinfo) 7468 { 7469 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7470 uinfo->count = 1; 7471 uinfo->value.integer.min = 0; 7472 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7473 return 0; 7474 } 7475 7476 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7477 struct snd_ctl_elem_value *ucontrol) 7478 { 7479 u8 s; 7480 int rc; 7481 7482 rc = volume_get_status(&s); 7483 if (rc < 0) 7484 return rc; 7485 7486 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7487 return 0; 7488 } 7489 7490 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7491 struct snd_ctl_elem_value *ucontrol) 7492 { 7493 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7494 ucontrol->value.integer.value[0]); 7495 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7496 } 7497 7498 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7499 7500 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7501 struct snd_ctl_elem_value *ucontrol) 7502 { 7503 u8 s; 7504 int rc; 7505 7506 rc = volume_get_status(&s); 7507 if (rc < 0) 7508 return rc; 7509 7510 ucontrol->value.integer.value[0] = 7511 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7512 return 0; 7513 } 7514 7515 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7516 struct snd_ctl_elem_value *ucontrol) 7517 { 7518 tpacpi_disclose_usertask("ALSA", "%smute\n", 7519 ucontrol->value.integer.value[0] ? 7520 "un" : ""); 7521 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7522 } 7523 7524 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7525 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7526 .name = "Console Playback Volume", 7527 .index = 0, 7528 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7529 .info = volume_alsa_vol_info, 7530 .get = volume_alsa_vol_get, 7531 }; 7532 7533 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7534 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7535 .name = "Console Playback Switch", 7536 .index = 0, 7537 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7538 .info = volume_alsa_mute_info, 7539 .get = volume_alsa_mute_get, 7540 }; 7541 7542 static void volume_suspend(void) 7543 { 7544 tpacpi_volume_checkpoint_nvram(); 7545 } 7546 7547 static void volume_resume(void) 7548 { 7549 if (software_mute_active) { 7550 if (volume_set_software_mute(false) < 0) 7551 pr_warn("Failed to restore software mute\n"); 7552 } else { 7553 volume_alsa_notify_change(); 7554 } 7555 } 7556 7557 static void volume_shutdown(void) 7558 { 7559 tpacpi_volume_checkpoint_nvram(); 7560 } 7561 7562 static void volume_exit(void) 7563 { 7564 if (alsa_card) { 7565 snd_card_free(alsa_card); 7566 alsa_card = NULL; 7567 } 7568 7569 tpacpi_volume_checkpoint_nvram(); 7570 7571 if (software_mute_active) 7572 volume_exit_software_mute(); 7573 } 7574 7575 static int __init volume_create_alsa_mixer(void) 7576 { 7577 struct snd_card *card; 7578 struct tpacpi_alsa_data *data; 7579 struct snd_kcontrol *ctl_vol; 7580 struct snd_kcontrol *ctl_mute; 7581 int rc; 7582 7583 rc = snd_card_new(&tpacpi_pdev->dev, 7584 alsa_index, alsa_id, THIS_MODULE, 7585 sizeof(struct tpacpi_alsa_data), &card); 7586 if (rc < 0 || !card) { 7587 pr_err("Failed to create ALSA card structures: %d\n", rc); 7588 return 1; 7589 } 7590 7591 BUG_ON(!card->private_data); 7592 data = card->private_data; 7593 data->card = card; 7594 7595 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7596 sizeof(card->driver)); 7597 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7598 sizeof(card->shortname)); 7599 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7600 (thinkpad_id.ec_version_str) ? 7601 thinkpad_id.ec_version_str : "(unknown)"); 7602 snprintf(card->longname, sizeof(card->longname), 7603 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7604 (thinkpad_id.ec_version_str) ? 7605 thinkpad_id.ec_version_str : "unknown"); 7606 7607 if (volume_control_allowed) { 7608 volume_alsa_control_vol.put = volume_alsa_vol_put; 7609 volume_alsa_control_vol.access = 7610 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7611 7612 volume_alsa_control_mute.put = volume_alsa_mute_put; 7613 volume_alsa_control_mute.access = 7614 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7615 } 7616 7617 if (!tp_features.mixer_no_level_control) { 7618 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7619 rc = snd_ctl_add(card, ctl_vol); 7620 if (rc < 0) { 7621 pr_err("Failed to create ALSA volume control: %d\n", 7622 rc); 7623 goto err_exit; 7624 } 7625 data->ctl_vol_id = &ctl_vol->id; 7626 } 7627 7628 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7629 rc = snd_ctl_add(card, ctl_mute); 7630 if (rc < 0) { 7631 pr_err("Failed to create ALSA mute control: %d\n", rc); 7632 goto err_exit; 7633 } 7634 data->ctl_mute_id = &ctl_mute->id; 7635 7636 rc = snd_card_register(card); 7637 if (rc < 0) { 7638 pr_err("Failed to register ALSA card: %d\n", rc); 7639 goto err_exit; 7640 } 7641 7642 alsa_card = card; 7643 return 0; 7644 7645 err_exit: 7646 snd_card_free(card); 7647 return 1; 7648 } 7649 7650 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7651 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7652 7653 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7654 /* Whitelist volume level on all IBM by default */ 7655 { .vendor = PCI_VENDOR_ID_IBM, 7656 .bios = TPACPI_MATCH_ANY, 7657 .ec = TPACPI_MATCH_ANY, 7658 .quirks = TPACPI_VOL_Q_LEVEL }, 7659 7660 /* Lenovo models with volume control (needs confirmation) */ 7661 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7662 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7663 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7664 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7665 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7666 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7667 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7668 7669 /* Whitelist mute-only on all Lenovo by default */ 7670 { .vendor = PCI_VENDOR_ID_LENOVO, 7671 .bios = TPACPI_MATCH_ANY, 7672 .ec = TPACPI_MATCH_ANY, 7673 .quirks = TPACPI_VOL_Q_MUTEONLY } 7674 }; 7675 7676 static int __init volume_init(struct ibm_init_struct *iibm) 7677 { 7678 unsigned long quirks; 7679 int rc; 7680 7681 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7682 7683 mutex_init(&volume_mutex); 7684 7685 /* 7686 * Check for module parameter bogosity, note that we 7687 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7688 * able to detect "unspecified" 7689 */ 7690 if (volume_mode > TPACPI_VOL_MODE_MAX) 7691 return -EINVAL; 7692 7693 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7694 pr_err("UCMS step volume mode not implemented, please contact %s\n", 7695 TPACPI_MAIL); 7696 return 1; 7697 } 7698 7699 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7700 return -EINVAL; 7701 7702 /* 7703 * The ALSA mixer is our primary interface. 7704 * When disabled, don't install the subdriver at all 7705 */ 7706 if (!alsa_enable) { 7707 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7708 "ALSA mixer disabled by parameter, not loading volume subdriver...\n"); 7709 return 1; 7710 } 7711 7712 quirks = tpacpi_check_quirks(volume_quirk_table, 7713 ARRAY_SIZE(volume_quirk_table)); 7714 7715 switch (volume_capabilities) { 7716 case TPACPI_VOL_CAP_AUTO: 7717 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7718 tp_features.mixer_no_level_control = 1; 7719 else if (quirks & TPACPI_VOL_Q_LEVEL) 7720 tp_features.mixer_no_level_control = 0; 7721 else 7722 return 1; /* no mixer */ 7723 break; 7724 case TPACPI_VOL_CAP_VOLMUTE: 7725 tp_features.mixer_no_level_control = 0; 7726 break; 7727 case TPACPI_VOL_CAP_MUTEONLY: 7728 tp_features.mixer_no_level_control = 1; 7729 break; 7730 default: 7731 return 1; 7732 } 7733 7734 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7735 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7736 "using user-supplied volume_capabilities=%d\n", 7737 volume_capabilities); 7738 7739 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7740 volume_mode == TPACPI_VOL_MODE_MAX) { 7741 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7742 7743 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7744 "driver auto-selected volume_mode=%d\n", 7745 volume_mode); 7746 } else { 7747 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7748 "using user-supplied volume_mode=%d\n", 7749 volume_mode); 7750 } 7751 7752 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7753 "mute is supported, volume control is %s\n", 7754 str_supported(!tp_features.mixer_no_level_control)); 7755 7756 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7757 software_mute_active = true; 7758 } else { 7759 rc = volume_create_alsa_mixer(); 7760 if (rc) { 7761 pr_err("Could not create the ALSA mixer interface\n"); 7762 return rc; 7763 } 7764 7765 pr_info("Console audio control enabled, mode: %s\n", 7766 (volume_control_allowed) ? 7767 "override (read/write)" : 7768 "monitor (read only)"); 7769 } 7770 7771 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7772 "registering volume hotkeys as change notification\n"); 7773 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7774 | TP_ACPI_HKEY_VOLUP_MASK 7775 | TP_ACPI_HKEY_VOLDWN_MASK 7776 | TP_ACPI_HKEY_MUTE_MASK); 7777 7778 return 0; 7779 } 7780 7781 static int volume_read(struct seq_file *m) 7782 { 7783 u8 status; 7784 7785 if (volume_get_status(&status) < 0) { 7786 seq_printf(m, "level:\t\tunreadable\n"); 7787 } else { 7788 if (tp_features.mixer_no_level_control) 7789 seq_printf(m, "level:\t\tunsupported\n"); 7790 else 7791 seq_printf(m, "level:\t\t%d\n", 7792 status & TP_EC_AUDIO_LVL_MSK); 7793 7794 seq_printf(m, "mute:\t\t%s\n", 7795 onoff(status, TP_EC_AUDIO_MUTESW)); 7796 7797 if (volume_control_allowed) { 7798 seq_printf(m, "commands:\tunmute, mute\n"); 7799 if (!tp_features.mixer_no_level_control) { 7800 seq_printf(m, "commands:\tup, down\n"); 7801 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7802 TP_EC_VOLUME_MAX); 7803 } 7804 } 7805 } 7806 7807 return 0; 7808 } 7809 7810 static int volume_write(char *buf) 7811 { 7812 u8 s; 7813 u8 new_level, new_mute; 7814 int l; 7815 char *cmd; 7816 int rc; 7817 7818 /* 7819 * We do allow volume control at driver startup, so that the 7820 * user can set initial state through the volume=... parameter hack. 7821 */ 7822 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7823 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7824 tp_warned.volume_ctrl_forbidden = 1; 7825 pr_notice("Console audio control in monitor mode, changes are not allowed\n"); 7826 pr_notice("Use the volume_control=1 module parameter to enable volume control\n"); 7827 } 7828 return -EPERM; 7829 } 7830 7831 rc = volume_get_status(&s); 7832 if (rc < 0) 7833 return rc; 7834 7835 new_level = s & TP_EC_AUDIO_LVL_MSK; 7836 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7837 7838 while ((cmd = strsep(&buf, ","))) { 7839 if (!tp_features.mixer_no_level_control) { 7840 if (strlencmp(cmd, "up") == 0) { 7841 if (new_mute) 7842 new_mute = 0; 7843 else if (new_level < TP_EC_VOLUME_MAX) 7844 new_level++; 7845 continue; 7846 } else if (strlencmp(cmd, "down") == 0) { 7847 if (new_mute) 7848 new_mute = 0; 7849 else if (new_level > 0) 7850 new_level--; 7851 continue; 7852 } else if (sscanf(cmd, "level %u", &l) == 1 && 7853 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7854 new_level = l; 7855 continue; 7856 } 7857 } 7858 if (strlencmp(cmd, "mute") == 0) 7859 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7860 else if (strlencmp(cmd, "unmute") == 0) 7861 new_mute = 0; 7862 else 7863 return -EINVAL; 7864 } 7865 7866 if (tp_features.mixer_no_level_control) { 7867 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7868 new_mute ? "" : "un"); 7869 rc = volume_set_mute(!!new_mute); 7870 } else { 7871 tpacpi_disclose_usertask("procfs volume", 7872 "%smute and set level to %d\n", 7873 new_mute ? "" : "un", new_level); 7874 rc = volume_set_status(new_mute | new_level); 7875 } 7876 volume_alsa_notify_change(); 7877 7878 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7879 } 7880 7881 static struct ibm_struct volume_driver_data = { 7882 .name = "volume", 7883 .read = volume_read, 7884 .write = volume_write, 7885 .exit = volume_exit, 7886 .suspend = volume_suspend, 7887 .resume = volume_resume, 7888 .shutdown = volume_shutdown, 7889 }; 7890 7891 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7892 7893 #define alsa_card NULL 7894 7895 static inline void volume_alsa_notify_change(void) 7896 { 7897 } 7898 7899 static int __init volume_init(struct ibm_init_struct *iibm) 7900 { 7901 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7902 7903 return 1; 7904 } 7905 7906 static struct ibm_struct volume_driver_data = { 7907 .name = "volume", 7908 }; 7909 7910 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7911 7912 /************************************************************************* 7913 * Fan subdriver 7914 */ 7915 7916 /* 7917 * FAN ACCESS MODES 7918 * 7919 * TPACPI_FAN_RD_ACPI_GFAN: 7920 * ACPI GFAN method: returns fan level 7921 * 7922 * see TPACPI_FAN_WR_ACPI_SFAN 7923 * EC 0x2f (HFSP) not available if GFAN exists 7924 * 7925 * TPACPI_FAN_WR_ACPI_SFAN: 7926 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7927 * 7928 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7929 * it for writing. 7930 * 7931 * TPACPI_FAN_WR_TPEC: 7932 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7933 * Supported on almost all ThinkPads 7934 * 7935 * Fan speed changes of any sort (including those caused by the 7936 * disengaged mode) are usually done slowly by the firmware as the 7937 * maximum amount of fan duty cycle change per second seems to be 7938 * limited. 7939 * 7940 * Reading is not available if GFAN exists. 7941 * Writing is not available if SFAN exists. 7942 * 7943 * Bits 7944 * 7 automatic mode engaged; 7945 * (default operation mode of the ThinkPad) 7946 * fan level is ignored in this mode. 7947 * 6 full speed mode (takes precedence over bit 7); 7948 * not available on all thinkpads. May disable 7949 * the tachometer while the fan controller ramps up 7950 * the speed (which can take up to a few *minutes*). 7951 * Speeds up fan to 100% duty-cycle, which is far above 7952 * the standard RPM levels. It is not impossible that 7953 * it could cause hardware damage. 7954 * 5-3 unused in some models. Extra bits for fan level 7955 * in others, but still useless as all values above 7956 * 7 map to the same speed as level 7 in these models. 7957 * 2-0 fan level (0..7 usually) 7958 * 0x00 = stop 7959 * 0x07 = max (set when temperatures critical) 7960 * Some ThinkPads may have other levels, see 7961 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7962 * 7963 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7964 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7965 * does so, its initial value is meaningless (0x07). 7966 * 7967 * For firmware bugs, refer to: 7968 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7969 * 7970 * ---- 7971 * 7972 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7973 * Main fan tachometer reading (in RPM) 7974 * 7975 * This register is present on all ThinkPads with a new-style EC, and 7976 * it is known not to be present on the A21m/e, and T22, as there is 7977 * something else in offset 0x84 according to the ACPI DSDT. Other 7978 * ThinkPads from this same time period (and earlier) probably lack the 7979 * tachometer as well. 7980 * 7981 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7982 * was never fixed by IBM to report the EC firmware version string 7983 * probably support the tachometer (like the early X models), so 7984 * detecting it is quite hard. We need more data to know for sure. 7985 * 7986 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7987 * might result. 7988 * 7989 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7990 * mode. 7991 * 7992 * For firmware bugs, refer to: 7993 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7994 * 7995 * ---- 7996 * 7997 * ThinkPad EC register 0x31 bit 0 (only on select models) 7998 * 7999 * When bit 0 of EC register 0x31 is zero, the tachometer registers 8000 * show the speed of the main fan. When bit 0 of EC register 0x31 8001 * is one, the tachometer registers show the speed of the auxiliary 8002 * fan. 8003 * 8004 * Fan control seems to affect both fans, regardless of the state 8005 * of this bit. 8006 * 8007 * So far, only the firmware for the X60/X61 non-tablet versions 8008 * seem to support this (firmware TP-7M). 8009 * 8010 * TPACPI_FAN_WR_ACPI_FANS: 8011 * ThinkPad X31, X40, X41. Not available in the X60. 8012 * 8013 * FANS ACPI handle: takes three arguments: low speed, medium speed, 8014 * high speed. ACPI DSDT seems to map these three speeds to levels 8015 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 8016 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 8017 * 8018 * The speeds are stored on handles 8019 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 8020 * 8021 * There are three default speed sets, accessible as handles: 8022 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 8023 * 8024 * ACPI DSDT switches which set is in use depending on various 8025 * factors. 8026 * 8027 * TPACPI_FAN_WR_TPEC is also available and should be used to 8028 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 8029 * but the ACPI tables just mention level 7. 8030 */ 8031 8032 enum { /* Fan control constants */ 8033 fan_status_offset = 0x2f, /* EC register 0x2f */ 8034 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 8035 * 0x84 must be read before 0x85 */ 8036 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 8037 bit 0 selects which fan is active */ 8038 8039 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 8040 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 8041 8042 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 8043 }; 8044 8045 enum fan_status_access_mode { 8046 TPACPI_FAN_NONE = 0, /* No fan status or control */ 8047 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 8048 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 8049 }; 8050 8051 enum fan_control_access_mode { 8052 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 8053 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 8054 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 8055 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 8056 }; 8057 8058 enum fan_control_commands { 8059 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 8060 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 8061 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 8062 * and also watchdog cmd */ 8063 }; 8064 8065 static bool fan_control_allowed; 8066 8067 static enum fan_status_access_mode fan_status_access_mode; 8068 static enum fan_control_access_mode fan_control_access_mode; 8069 static enum fan_control_commands fan_control_commands; 8070 8071 static u8 fan_control_initial_status; 8072 static u8 fan_control_desired_level; 8073 static u8 fan_control_resume_level; 8074 static int fan_watchdog_maxinterval; 8075 8076 static struct mutex fan_mutex; 8077 8078 static void fan_watchdog_fire(struct work_struct *ignored); 8079 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 8080 8081 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 8082 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 8083 "\\FSPD", /* 600e/x, 770e, 770x */ 8084 ); /* all others */ 8085 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 8086 "JFNS", /* 770x-JL */ 8087 ); /* all others */ 8088 8089 /* 8090 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 8091 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 8092 * be in auto mode (0x80). 8093 * 8094 * This is corrected by any write to HFSP either by the driver, or 8095 * by the firmware. 8096 * 8097 * We assume 0x07 really means auto mode while this quirk is active, 8098 * as this is far more likely than the ThinkPad being in level 7, 8099 * which is only used by the firmware during thermal emergencies. 8100 * 8101 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 8102 * TP-70 (T43, R52), which are known to be buggy. 8103 */ 8104 8105 static void fan_quirk1_setup(void) 8106 { 8107 if (fan_control_initial_status == 0x07) { 8108 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n"); 8109 tp_features.fan_ctrl_status_undef = 1; 8110 } 8111 } 8112 8113 static void fan_quirk1_handle(u8 *fan_status) 8114 { 8115 if (unlikely(tp_features.fan_ctrl_status_undef)) { 8116 if (*fan_status != fan_control_initial_status) { 8117 /* something changed the HFSP regisnter since 8118 * driver init time, so it is not undefined 8119 * anymore */ 8120 tp_features.fan_ctrl_status_undef = 0; 8121 } else { 8122 /* Return most likely status. In fact, it 8123 * might be the only possible status */ 8124 *fan_status = TP_EC_FAN_AUTO; 8125 } 8126 } 8127 } 8128 8129 /* Select main fan on X60/X61, NOOP on others */ 8130 static bool fan_select_fan1(void) 8131 { 8132 if (tp_features.second_fan) { 8133 u8 val; 8134 8135 if (ec_read(fan_select_offset, &val) < 0) 8136 return false; 8137 val &= 0xFEU; 8138 if (ec_write(fan_select_offset, val) < 0) 8139 return false; 8140 } 8141 return true; 8142 } 8143 8144 /* Select secondary fan on X60/X61 */ 8145 static bool fan_select_fan2(void) 8146 { 8147 u8 val; 8148 8149 if (!tp_features.second_fan) 8150 return false; 8151 8152 if (ec_read(fan_select_offset, &val) < 0) 8153 return false; 8154 val |= 0x01U; 8155 if (ec_write(fan_select_offset, val) < 0) 8156 return false; 8157 8158 return true; 8159 } 8160 8161 /* 8162 * Call with fan_mutex held 8163 */ 8164 static void fan_update_desired_level(u8 status) 8165 { 8166 if ((status & 8167 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8168 if (status > 7) 8169 fan_control_desired_level = 7; 8170 else 8171 fan_control_desired_level = status; 8172 } 8173 } 8174 8175 static int fan_get_status(u8 *status) 8176 { 8177 u8 s; 8178 8179 /* TODO: 8180 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8181 8182 switch (fan_status_access_mode) { 8183 case TPACPI_FAN_RD_ACPI_GFAN: { 8184 /* 570, 600e/x, 770e, 770x */ 8185 int res; 8186 8187 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8188 return -EIO; 8189 8190 if (likely(status)) 8191 *status = res & 0x07; 8192 8193 break; 8194 } 8195 case TPACPI_FAN_RD_TPEC: 8196 /* all except 570, 600e/x, 770e, 770x */ 8197 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8198 return -EIO; 8199 8200 if (likely(status)) { 8201 *status = s; 8202 fan_quirk1_handle(status); 8203 } 8204 8205 break; 8206 8207 default: 8208 return -ENXIO; 8209 } 8210 8211 return 0; 8212 } 8213 8214 static int fan_get_status_safe(u8 *status) 8215 { 8216 int rc; 8217 u8 s; 8218 8219 if (mutex_lock_killable(&fan_mutex)) 8220 return -ERESTARTSYS; 8221 rc = fan_get_status(&s); 8222 if (!rc) 8223 fan_update_desired_level(s); 8224 mutex_unlock(&fan_mutex); 8225 8226 if (rc) 8227 return rc; 8228 if (status) 8229 *status = s; 8230 8231 return 0; 8232 } 8233 8234 static int fan_get_speed(unsigned int *speed) 8235 { 8236 u8 hi, lo; 8237 8238 switch (fan_status_access_mode) { 8239 case TPACPI_FAN_RD_TPEC: 8240 /* all except 570, 600e/x, 770e, 770x */ 8241 if (unlikely(!fan_select_fan1())) 8242 return -EIO; 8243 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8244 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8245 return -EIO; 8246 8247 if (likely(speed)) 8248 *speed = (hi << 8) | lo; 8249 8250 break; 8251 8252 default: 8253 return -ENXIO; 8254 } 8255 8256 return 0; 8257 } 8258 8259 static int fan2_get_speed(unsigned int *speed) 8260 { 8261 u8 hi, lo; 8262 bool rc; 8263 8264 switch (fan_status_access_mode) { 8265 case TPACPI_FAN_RD_TPEC: 8266 /* all except 570, 600e/x, 770e, 770x */ 8267 if (unlikely(!fan_select_fan2())) 8268 return -EIO; 8269 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8270 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8271 fan_select_fan1(); /* play it safe */ 8272 if (rc) 8273 return -EIO; 8274 8275 if (likely(speed)) 8276 *speed = (hi << 8) | lo; 8277 8278 break; 8279 8280 default: 8281 return -ENXIO; 8282 } 8283 8284 return 0; 8285 } 8286 8287 static int fan_set_level(int level) 8288 { 8289 if (!fan_control_allowed) 8290 return -EPERM; 8291 8292 switch (fan_control_access_mode) { 8293 case TPACPI_FAN_WR_ACPI_SFAN: 8294 if ((level < 0) || (level > 7)) 8295 return -EINVAL; 8296 8297 if (tp_features.second_fan_ctl) { 8298 if (!fan_select_fan2() || 8299 !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) { 8300 pr_warn("Couldn't set 2nd fan level, disabling support\n"); 8301 tp_features.second_fan_ctl = 0; 8302 } 8303 fan_select_fan1(); 8304 } 8305 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8306 return -EIO; 8307 break; 8308 8309 case TPACPI_FAN_WR_ACPI_FANS: 8310 case TPACPI_FAN_WR_TPEC: 8311 if (!(level & TP_EC_FAN_AUTO) && 8312 !(level & TP_EC_FAN_FULLSPEED) && 8313 ((level < 0) || (level > 7))) 8314 return -EINVAL; 8315 8316 /* safety net should the EC not support AUTO 8317 * or FULLSPEED mode bits and just ignore them */ 8318 if (level & TP_EC_FAN_FULLSPEED) 8319 level |= 7; /* safety min speed 7 */ 8320 else if (level & TP_EC_FAN_AUTO) 8321 level |= 4; /* safety min speed 4 */ 8322 8323 if (tp_features.second_fan_ctl) { 8324 if (!fan_select_fan2() || 8325 !acpi_ec_write(fan_status_offset, level)) { 8326 pr_warn("Couldn't set 2nd fan level, disabling support\n"); 8327 tp_features.second_fan_ctl = 0; 8328 } 8329 fan_select_fan1(); 8330 8331 } 8332 if (!acpi_ec_write(fan_status_offset, level)) 8333 return -EIO; 8334 else 8335 tp_features.fan_ctrl_status_undef = 0; 8336 break; 8337 8338 default: 8339 return -ENXIO; 8340 } 8341 8342 vdbg_printk(TPACPI_DBG_FAN, 8343 "fan control: set fan control register to 0x%02x\n", level); 8344 return 0; 8345 } 8346 8347 static int fan_set_level_safe(int level) 8348 { 8349 int rc; 8350 8351 if (!fan_control_allowed) 8352 return -EPERM; 8353 8354 if (mutex_lock_killable(&fan_mutex)) 8355 return -ERESTARTSYS; 8356 8357 if (level == TPACPI_FAN_LAST_LEVEL) 8358 level = fan_control_desired_level; 8359 8360 rc = fan_set_level(level); 8361 if (!rc) 8362 fan_update_desired_level(level); 8363 8364 mutex_unlock(&fan_mutex); 8365 return rc; 8366 } 8367 8368 static int fan_set_enable(void) 8369 { 8370 u8 s; 8371 int rc; 8372 8373 if (!fan_control_allowed) 8374 return -EPERM; 8375 8376 if (mutex_lock_killable(&fan_mutex)) 8377 return -ERESTARTSYS; 8378 8379 switch (fan_control_access_mode) { 8380 case TPACPI_FAN_WR_ACPI_FANS: 8381 case TPACPI_FAN_WR_TPEC: 8382 rc = fan_get_status(&s); 8383 if (rc < 0) 8384 break; 8385 8386 /* Don't go out of emergency fan mode */ 8387 if (s != 7) { 8388 s &= 0x07; 8389 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8390 } 8391 8392 if (!acpi_ec_write(fan_status_offset, s)) 8393 rc = -EIO; 8394 else { 8395 tp_features.fan_ctrl_status_undef = 0; 8396 rc = 0; 8397 } 8398 break; 8399 8400 case TPACPI_FAN_WR_ACPI_SFAN: 8401 rc = fan_get_status(&s); 8402 if (rc < 0) 8403 break; 8404 8405 s &= 0x07; 8406 8407 /* Set fan to at least level 4 */ 8408 s |= 4; 8409 8410 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8411 rc = -EIO; 8412 else 8413 rc = 0; 8414 break; 8415 8416 default: 8417 rc = -ENXIO; 8418 } 8419 8420 mutex_unlock(&fan_mutex); 8421 8422 if (!rc) 8423 vdbg_printk(TPACPI_DBG_FAN, 8424 "fan control: set fan control register to 0x%02x\n", 8425 s); 8426 return rc; 8427 } 8428 8429 static int fan_set_disable(void) 8430 { 8431 int rc; 8432 8433 if (!fan_control_allowed) 8434 return -EPERM; 8435 8436 if (mutex_lock_killable(&fan_mutex)) 8437 return -ERESTARTSYS; 8438 8439 rc = 0; 8440 switch (fan_control_access_mode) { 8441 case TPACPI_FAN_WR_ACPI_FANS: 8442 case TPACPI_FAN_WR_TPEC: 8443 if (!acpi_ec_write(fan_status_offset, 0x00)) 8444 rc = -EIO; 8445 else { 8446 fan_control_desired_level = 0; 8447 tp_features.fan_ctrl_status_undef = 0; 8448 } 8449 break; 8450 8451 case TPACPI_FAN_WR_ACPI_SFAN: 8452 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8453 rc = -EIO; 8454 else 8455 fan_control_desired_level = 0; 8456 break; 8457 8458 default: 8459 rc = -ENXIO; 8460 } 8461 8462 if (!rc) 8463 vdbg_printk(TPACPI_DBG_FAN, 8464 "fan control: set fan control register to 0\n"); 8465 8466 mutex_unlock(&fan_mutex); 8467 return rc; 8468 } 8469 8470 static int fan_set_speed(int speed) 8471 { 8472 int rc; 8473 8474 if (!fan_control_allowed) 8475 return -EPERM; 8476 8477 if (mutex_lock_killable(&fan_mutex)) 8478 return -ERESTARTSYS; 8479 8480 rc = 0; 8481 switch (fan_control_access_mode) { 8482 case TPACPI_FAN_WR_ACPI_FANS: 8483 if (speed >= 0 && speed <= 65535) { 8484 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8485 speed, speed, speed)) 8486 rc = -EIO; 8487 } else 8488 rc = -EINVAL; 8489 break; 8490 8491 default: 8492 rc = -ENXIO; 8493 } 8494 8495 mutex_unlock(&fan_mutex); 8496 return rc; 8497 } 8498 8499 static void fan_watchdog_reset(void) 8500 { 8501 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8502 return; 8503 8504 if (fan_watchdog_maxinterval > 0 && 8505 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8506 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8507 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8508 else 8509 cancel_delayed_work(&fan_watchdog_task); 8510 } 8511 8512 static void fan_watchdog_fire(struct work_struct *ignored) 8513 { 8514 int rc; 8515 8516 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8517 return; 8518 8519 pr_notice("fan watchdog: enabling fan\n"); 8520 rc = fan_set_enable(); 8521 if (rc < 0) { 8522 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n", 8523 rc); 8524 /* reschedule for later */ 8525 fan_watchdog_reset(); 8526 } 8527 } 8528 8529 /* 8530 * SYSFS fan layout: hwmon compatible (device) 8531 * 8532 * pwm*_enable: 8533 * 0: "disengaged" mode 8534 * 1: manual mode 8535 * 2: native EC "auto" mode (recommended, hardware default) 8536 * 8537 * pwm*: set speed in manual mode, ignored otherwise. 8538 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8539 * interpolation. 8540 * 8541 * fan*_input: tachometer reading, RPM 8542 * 8543 * 8544 * SYSFS fan layout: extensions 8545 * 8546 * fan_watchdog (driver): 8547 * fan watchdog interval in seconds, 0 disables (default), max 120 8548 */ 8549 8550 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8551 static ssize_t fan_pwm1_enable_show(struct device *dev, 8552 struct device_attribute *attr, 8553 char *buf) 8554 { 8555 int res, mode; 8556 u8 status; 8557 8558 res = fan_get_status_safe(&status); 8559 if (res) 8560 return res; 8561 8562 if (status & TP_EC_FAN_FULLSPEED) { 8563 mode = 0; 8564 } else if (status & TP_EC_FAN_AUTO) { 8565 mode = 2; 8566 } else 8567 mode = 1; 8568 8569 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8570 } 8571 8572 static ssize_t fan_pwm1_enable_store(struct device *dev, 8573 struct device_attribute *attr, 8574 const char *buf, size_t count) 8575 { 8576 unsigned long t; 8577 int res, level; 8578 8579 if (parse_strtoul(buf, 2, &t)) 8580 return -EINVAL; 8581 8582 tpacpi_disclose_usertask("hwmon pwm1_enable", 8583 "set fan mode to %lu\n", t); 8584 8585 switch (t) { 8586 case 0: 8587 level = TP_EC_FAN_FULLSPEED; 8588 break; 8589 case 1: 8590 level = TPACPI_FAN_LAST_LEVEL; 8591 break; 8592 case 2: 8593 level = TP_EC_FAN_AUTO; 8594 break; 8595 case 3: 8596 /* reserved for software-controlled auto mode */ 8597 return -ENOSYS; 8598 default: 8599 return -EINVAL; 8600 } 8601 8602 res = fan_set_level_safe(level); 8603 if (res == -ENXIO) 8604 return -EINVAL; 8605 else if (res < 0) 8606 return res; 8607 8608 fan_watchdog_reset(); 8609 8610 return count; 8611 } 8612 8613 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8614 fan_pwm1_enable_show, fan_pwm1_enable_store); 8615 8616 /* sysfs fan pwm1 ------------------------------------------------------ */ 8617 static ssize_t fan_pwm1_show(struct device *dev, 8618 struct device_attribute *attr, 8619 char *buf) 8620 { 8621 int res; 8622 u8 status; 8623 8624 res = fan_get_status_safe(&status); 8625 if (res) 8626 return res; 8627 8628 if ((status & 8629 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8630 status = fan_control_desired_level; 8631 8632 if (status > 7) 8633 status = 7; 8634 8635 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8636 } 8637 8638 static ssize_t fan_pwm1_store(struct device *dev, 8639 struct device_attribute *attr, 8640 const char *buf, size_t count) 8641 { 8642 unsigned long s; 8643 int rc; 8644 u8 status, newlevel; 8645 8646 if (parse_strtoul(buf, 255, &s)) 8647 return -EINVAL; 8648 8649 tpacpi_disclose_usertask("hwmon pwm1", 8650 "set fan speed to %lu\n", s); 8651 8652 /* scale down from 0-255 to 0-7 */ 8653 newlevel = (s >> 5) & 0x07; 8654 8655 if (mutex_lock_killable(&fan_mutex)) 8656 return -ERESTARTSYS; 8657 8658 rc = fan_get_status(&status); 8659 if (!rc && (status & 8660 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8661 rc = fan_set_level(newlevel); 8662 if (rc == -ENXIO) 8663 rc = -EINVAL; 8664 else if (!rc) { 8665 fan_update_desired_level(newlevel); 8666 fan_watchdog_reset(); 8667 } 8668 } 8669 8670 mutex_unlock(&fan_mutex); 8671 return (rc) ? rc : count; 8672 } 8673 8674 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8675 8676 /* sysfs fan fan1_input ------------------------------------------------ */ 8677 static ssize_t fan_fan1_input_show(struct device *dev, 8678 struct device_attribute *attr, 8679 char *buf) 8680 { 8681 int res; 8682 unsigned int speed; 8683 8684 res = fan_get_speed(&speed); 8685 if (res < 0) 8686 return res; 8687 8688 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8689 } 8690 8691 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8692 8693 /* sysfs fan fan2_input ------------------------------------------------ */ 8694 static ssize_t fan_fan2_input_show(struct device *dev, 8695 struct device_attribute *attr, 8696 char *buf) 8697 { 8698 int res; 8699 unsigned int speed; 8700 8701 res = fan2_get_speed(&speed); 8702 if (res < 0) 8703 return res; 8704 8705 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8706 } 8707 8708 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8709 8710 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8711 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf) 8712 { 8713 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8714 } 8715 8716 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf, 8717 size_t count) 8718 { 8719 unsigned long t; 8720 8721 if (parse_strtoul(buf, 120, &t)) 8722 return -EINVAL; 8723 8724 if (!fan_control_allowed) 8725 return -EPERM; 8726 8727 fan_watchdog_maxinterval = t; 8728 fan_watchdog_reset(); 8729 8730 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8731 8732 return count; 8733 } 8734 static DRIVER_ATTR_RW(fan_watchdog); 8735 8736 /* --------------------------------------------------------------------- */ 8737 static struct attribute *fan_attributes[] = { 8738 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8739 &dev_attr_fan1_input.attr, 8740 NULL, /* for fan2_input */ 8741 NULL 8742 }; 8743 8744 static const struct attribute_group fan_attr_group = { 8745 .attrs = fan_attributes, 8746 }; 8747 8748 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8749 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8750 #define TPACPI_FAN_2CTL 0x0004 /* selects fan2 control */ 8751 8752 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8753 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1), 8754 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1), 8755 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1), 8756 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1), 8757 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN), 8758 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN), 8759 TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL), /* P70 */ 8760 TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL), /* P50 */ 8761 TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL), /* P71 */ 8762 TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL), /* P51 */ 8763 TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL), /* P52 / P72 */ 8764 TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (1st gen) */ 8765 TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (2nd gen) */ 8766 }; 8767 8768 static int __init fan_init(struct ibm_init_struct *iibm) 8769 { 8770 int rc; 8771 unsigned long quirks; 8772 8773 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8774 "initializing fan subdriver\n"); 8775 8776 mutex_init(&fan_mutex); 8777 fan_status_access_mode = TPACPI_FAN_NONE; 8778 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8779 fan_control_commands = 0; 8780 fan_watchdog_maxinterval = 0; 8781 tp_features.fan_ctrl_status_undef = 0; 8782 tp_features.second_fan = 0; 8783 tp_features.second_fan_ctl = 0; 8784 fan_control_desired_level = 7; 8785 8786 if (tpacpi_is_ibm()) { 8787 TPACPI_ACPIHANDLE_INIT(fans); 8788 TPACPI_ACPIHANDLE_INIT(gfan); 8789 TPACPI_ACPIHANDLE_INIT(sfan); 8790 } 8791 8792 quirks = tpacpi_check_quirks(fan_quirk_table, 8793 ARRAY_SIZE(fan_quirk_table)); 8794 8795 if (gfan_handle) { 8796 /* 570, 600e/x, 770e, 770x */ 8797 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8798 } else { 8799 /* all other ThinkPads: note that even old-style 8800 * ThinkPad ECs supports the fan control register */ 8801 if (likely(acpi_ec_read(fan_status_offset, 8802 &fan_control_initial_status))) { 8803 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8804 if (quirks & TPACPI_FAN_Q1) 8805 fan_quirk1_setup(); 8806 if (quirks & TPACPI_FAN_2FAN) { 8807 tp_features.second_fan = 1; 8808 pr_info("secondary fan support enabled\n"); 8809 } 8810 if (quirks & TPACPI_FAN_2CTL) { 8811 tp_features.second_fan = 1; 8812 tp_features.second_fan_ctl = 1; 8813 pr_info("secondary fan control enabled\n"); 8814 } 8815 } else { 8816 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n"); 8817 return 1; 8818 } 8819 } 8820 8821 if (sfan_handle) { 8822 /* 570, 770x-JL */ 8823 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8824 fan_control_commands |= 8825 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8826 } else { 8827 if (!gfan_handle) { 8828 /* gfan without sfan means no fan control */ 8829 /* all other models implement TP EC 0x2f control */ 8830 8831 if (fans_handle) { 8832 /* X31, X40, X41 */ 8833 fan_control_access_mode = 8834 TPACPI_FAN_WR_ACPI_FANS; 8835 fan_control_commands |= 8836 TPACPI_FAN_CMD_SPEED | 8837 TPACPI_FAN_CMD_LEVEL | 8838 TPACPI_FAN_CMD_ENABLE; 8839 } else { 8840 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8841 fan_control_commands |= 8842 TPACPI_FAN_CMD_LEVEL | 8843 TPACPI_FAN_CMD_ENABLE; 8844 } 8845 } 8846 } 8847 8848 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8849 "fan is %s, modes %d, %d\n", 8850 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8851 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8852 fan_status_access_mode, fan_control_access_mode); 8853 8854 /* fan control master switch */ 8855 if (!fan_control_allowed) { 8856 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8857 fan_control_commands = 0; 8858 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8859 "fan control features disabled by parameter\n"); 8860 } 8861 8862 /* update fan_control_desired_level */ 8863 if (fan_status_access_mode != TPACPI_FAN_NONE) 8864 fan_get_status_safe(NULL); 8865 8866 if (fan_status_access_mode != TPACPI_FAN_NONE || 8867 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8868 if (tp_features.second_fan) { 8869 /* attach second fan tachometer */ 8870 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8871 &dev_attr_fan2_input.attr; 8872 } 8873 rc = sysfs_create_group(&tpacpi_hwmon->kobj, 8874 &fan_attr_group); 8875 if (rc < 0) 8876 return rc; 8877 8878 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8879 &driver_attr_fan_watchdog); 8880 if (rc < 0) { 8881 sysfs_remove_group(&tpacpi_hwmon->kobj, 8882 &fan_attr_group); 8883 return rc; 8884 } 8885 return 0; 8886 } else 8887 return 1; 8888 } 8889 8890 static void fan_exit(void) 8891 { 8892 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8893 "cancelling any pending fan watchdog tasks\n"); 8894 8895 /* FIXME: can we really do this unconditionally? */ 8896 sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group); 8897 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8898 &driver_attr_fan_watchdog); 8899 8900 cancel_delayed_work(&fan_watchdog_task); 8901 flush_workqueue(tpacpi_wq); 8902 } 8903 8904 static void fan_suspend(void) 8905 { 8906 int rc; 8907 8908 if (!fan_control_allowed) 8909 return; 8910 8911 /* Store fan status in cache */ 8912 fan_control_resume_level = 0; 8913 rc = fan_get_status_safe(&fan_control_resume_level); 8914 if (rc < 0) 8915 pr_notice("failed to read fan level for later restore during resume: %d\n", 8916 rc); 8917 8918 /* if it is undefined, don't attempt to restore it. 8919 * KEEP THIS LAST */ 8920 if (tp_features.fan_ctrl_status_undef) 8921 fan_control_resume_level = 0; 8922 } 8923 8924 static void fan_resume(void) 8925 { 8926 u8 current_level = 7; 8927 bool do_set = false; 8928 int rc; 8929 8930 /* DSDT *always* updates status on resume */ 8931 tp_features.fan_ctrl_status_undef = 0; 8932 8933 if (!fan_control_allowed || 8934 !fan_control_resume_level || 8935 (fan_get_status_safe(¤t_level) < 0)) 8936 return; 8937 8938 switch (fan_control_access_mode) { 8939 case TPACPI_FAN_WR_ACPI_SFAN: 8940 /* never decrease fan level */ 8941 do_set = (fan_control_resume_level > current_level); 8942 break; 8943 case TPACPI_FAN_WR_ACPI_FANS: 8944 case TPACPI_FAN_WR_TPEC: 8945 /* never decrease fan level, scale is: 8946 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8947 * 8948 * We expect the firmware to set either 7 or AUTO, but we 8949 * handle FULLSPEED out of paranoia. 8950 * 8951 * So, we can safely only restore FULLSPEED or 7, anything 8952 * else could slow the fan. Restoring AUTO is useless, at 8953 * best that's exactly what the DSDT already set (it is the 8954 * slower it uses). 8955 * 8956 * Always keep in mind that the DSDT *will* have set the 8957 * fans to what the vendor supposes is the best level. We 8958 * muck with it only to speed the fan up. 8959 */ 8960 if (fan_control_resume_level != 7 && 8961 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8962 return; 8963 else 8964 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8965 (current_level != fan_control_resume_level); 8966 break; 8967 default: 8968 return; 8969 } 8970 if (do_set) { 8971 pr_notice("restoring fan level to 0x%02x\n", 8972 fan_control_resume_level); 8973 rc = fan_set_level_safe(fan_control_resume_level); 8974 if (rc < 0) 8975 pr_notice("failed to restore fan level: %d\n", rc); 8976 } 8977 } 8978 8979 static int fan_read(struct seq_file *m) 8980 { 8981 int rc; 8982 u8 status; 8983 unsigned int speed = 0; 8984 8985 switch (fan_status_access_mode) { 8986 case TPACPI_FAN_RD_ACPI_GFAN: 8987 /* 570, 600e/x, 770e, 770x */ 8988 rc = fan_get_status_safe(&status); 8989 if (rc < 0) 8990 return rc; 8991 8992 seq_printf(m, "status:\t\t%s\n" 8993 "level:\t\t%d\n", 8994 (status != 0) ? "enabled" : "disabled", status); 8995 break; 8996 8997 case TPACPI_FAN_RD_TPEC: 8998 /* all except 570, 600e/x, 770e, 770x */ 8999 rc = fan_get_status_safe(&status); 9000 if (rc < 0) 9001 return rc; 9002 9003 seq_printf(m, "status:\t\t%s\n", 9004 (status != 0) ? "enabled" : "disabled"); 9005 9006 rc = fan_get_speed(&speed); 9007 if (rc < 0) 9008 return rc; 9009 9010 seq_printf(m, "speed:\t\t%d\n", speed); 9011 9012 if (status & TP_EC_FAN_FULLSPEED) 9013 /* Disengaged mode takes precedence */ 9014 seq_printf(m, "level:\t\tdisengaged\n"); 9015 else if (status & TP_EC_FAN_AUTO) 9016 seq_printf(m, "level:\t\tauto\n"); 9017 else 9018 seq_printf(m, "level:\t\t%d\n", status); 9019 break; 9020 9021 case TPACPI_FAN_NONE: 9022 default: 9023 seq_printf(m, "status:\t\tnot supported\n"); 9024 } 9025 9026 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 9027 seq_printf(m, "commands:\tlevel <level>"); 9028 9029 switch (fan_control_access_mode) { 9030 case TPACPI_FAN_WR_ACPI_SFAN: 9031 seq_printf(m, " (<level> is 0-7)\n"); 9032 break; 9033 9034 default: 9035 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n"); 9036 break; 9037 } 9038 } 9039 9040 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 9041 seq_printf(m, "commands:\tenable, disable\n" 9042 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n"); 9043 9044 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 9045 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n"); 9046 9047 return 0; 9048 } 9049 9050 static int fan_write_cmd_level(const char *cmd, int *rc) 9051 { 9052 int level; 9053 9054 if (strlencmp(cmd, "level auto") == 0) 9055 level = TP_EC_FAN_AUTO; 9056 else if ((strlencmp(cmd, "level disengaged") == 0) | 9057 (strlencmp(cmd, "level full-speed") == 0)) 9058 level = TP_EC_FAN_FULLSPEED; 9059 else if (sscanf(cmd, "level %d", &level) != 1) 9060 return 0; 9061 9062 *rc = fan_set_level_safe(level); 9063 if (*rc == -ENXIO) 9064 pr_err("level command accepted for unsupported access mode %d\n", 9065 fan_control_access_mode); 9066 else if (!*rc) 9067 tpacpi_disclose_usertask("procfs fan", 9068 "set level to %d\n", level); 9069 9070 return 1; 9071 } 9072 9073 static int fan_write_cmd_enable(const char *cmd, int *rc) 9074 { 9075 if (strlencmp(cmd, "enable") != 0) 9076 return 0; 9077 9078 *rc = fan_set_enable(); 9079 if (*rc == -ENXIO) 9080 pr_err("enable command accepted for unsupported access mode %d\n", 9081 fan_control_access_mode); 9082 else if (!*rc) 9083 tpacpi_disclose_usertask("procfs fan", "enable\n"); 9084 9085 return 1; 9086 } 9087 9088 static int fan_write_cmd_disable(const char *cmd, int *rc) 9089 { 9090 if (strlencmp(cmd, "disable") != 0) 9091 return 0; 9092 9093 *rc = fan_set_disable(); 9094 if (*rc == -ENXIO) 9095 pr_err("disable command accepted for unsupported access mode %d\n", 9096 fan_control_access_mode); 9097 else if (!*rc) 9098 tpacpi_disclose_usertask("procfs fan", "disable\n"); 9099 9100 return 1; 9101 } 9102 9103 static int fan_write_cmd_speed(const char *cmd, int *rc) 9104 { 9105 int speed; 9106 9107 /* TODO: 9108 * Support speed <low> <medium> <high> ? */ 9109 9110 if (sscanf(cmd, "speed %d", &speed) != 1) 9111 return 0; 9112 9113 *rc = fan_set_speed(speed); 9114 if (*rc == -ENXIO) 9115 pr_err("speed command accepted for unsupported access mode %d\n", 9116 fan_control_access_mode); 9117 else if (!*rc) 9118 tpacpi_disclose_usertask("procfs fan", 9119 "set speed to %d\n", speed); 9120 9121 return 1; 9122 } 9123 9124 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 9125 { 9126 int interval; 9127 9128 if (sscanf(cmd, "watchdog %d", &interval) != 1) 9129 return 0; 9130 9131 if (interval < 0 || interval > 120) 9132 *rc = -EINVAL; 9133 else { 9134 fan_watchdog_maxinterval = interval; 9135 tpacpi_disclose_usertask("procfs fan", 9136 "set watchdog timer to %d\n", 9137 interval); 9138 } 9139 9140 return 1; 9141 } 9142 9143 static int fan_write(char *buf) 9144 { 9145 char *cmd; 9146 int rc = 0; 9147 9148 while (!rc && (cmd = strsep(&buf, ","))) { 9149 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 9150 fan_write_cmd_level(cmd, &rc)) && 9151 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 9152 (fan_write_cmd_enable(cmd, &rc) || 9153 fan_write_cmd_disable(cmd, &rc) || 9154 fan_write_cmd_watchdog(cmd, &rc))) && 9155 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 9156 fan_write_cmd_speed(cmd, &rc)) 9157 ) 9158 rc = -EINVAL; 9159 else if (!rc) 9160 fan_watchdog_reset(); 9161 } 9162 9163 return rc; 9164 } 9165 9166 static struct ibm_struct fan_driver_data = { 9167 .name = "fan", 9168 .read = fan_read, 9169 .write = fan_write, 9170 .exit = fan_exit, 9171 .suspend = fan_suspend, 9172 .resume = fan_resume, 9173 }; 9174 9175 /************************************************************************* 9176 * Mute LED subdriver 9177 */ 9178 9179 #define TPACPI_LED_MAX 2 9180 9181 struct tp_led_table { 9182 acpi_string name; 9183 int on_value; 9184 int off_value; 9185 int state; 9186 }; 9187 9188 static struct tp_led_table led_tables[TPACPI_LED_MAX] = { 9189 [LED_AUDIO_MUTE] = { 9190 .name = "SSMS", 9191 .on_value = 1, 9192 .off_value = 0, 9193 }, 9194 [LED_AUDIO_MICMUTE] = { 9195 .name = "MMTS", 9196 .on_value = 2, 9197 .off_value = 0, 9198 }, 9199 }; 9200 9201 static int mute_led_on_off(struct tp_led_table *t, bool state) 9202 { 9203 acpi_handle temp; 9204 int output; 9205 9206 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9207 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9208 return -EIO; 9209 } 9210 9211 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9212 state ? t->on_value : t->off_value)) 9213 return -EIO; 9214 9215 t->state = state; 9216 return state; 9217 } 9218 9219 static int tpacpi_led_set(int whichled, bool on) 9220 { 9221 struct tp_led_table *t; 9222 9223 t = &led_tables[whichled]; 9224 if (t->state < 0 || t->state == on) 9225 return t->state; 9226 return mute_led_on_off(t, on); 9227 } 9228 9229 static int tpacpi_led_mute_set(struct led_classdev *led_cdev, 9230 enum led_brightness brightness) 9231 { 9232 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF); 9233 } 9234 9235 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev, 9236 enum led_brightness brightness) 9237 { 9238 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF); 9239 } 9240 9241 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = { 9242 [LED_AUDIO_MUTE] = { 9243 .name = "platform::mute", 9244 .max_brightness = 1, 9245 .brightness_set_blocking = tpacpi_led_mute_set, 9246 .default_trigger = "audio-mute", 9247 }, 9248 [LED_AUDIO_MICMUTE] = { 9249 .name = "platform::micmute", 9250 .max_brightness = 1, 9251 .brightness_set_blocking = tpacpi_led_micmute_set, 9252 .default_trigger = "audio-micmute", 9253 }, 9254 }; 9255 9256 static int mute_led_init(struct ibm_init_struct *iibm) 9257 { 9258 acpi_handle temp; 9259 int i, err; 9260 9261 for (i = 0; i < TPACPI_LED_MAX; i++) { 9262 struct tp_led_table *t = &led_tables[i]; 9263 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9264 t->state = -ENODEV; 9265 continue; 9266 } 9267 9268 mute_led_cdev[i].brightness = ledtrig_audio_get(i); 9269 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]); 9270 if (err < 0) { 9271 while (i--) 9272 led_classdev_unregister(&mute_led_cdev[i]); 9273 return err; 9274 } 9275 } 9276 return 0; 9277 } 9278 9279 static void mute_led_exit(void) 9280 { 9281 int i; 9282 9283 for (i = 0; i < TPACPI_LED_MAX; i++) { 9284 led_classdev_unregister(&mute_led_cdev[i]); 9285 tpacpi_led_set(i, false); 9286 } 9287 } 9288 9289 static void mute_led_resume(void) 9290 { 9291 int i; 9292 9293 for (i = 0; i < TPACPI_LED_MAX; i++) { 9294 struct tp_led_table *t = &led_tables[i]; 9295 if (t->state >= 0) 9296 mute_led_on_off(t, t->state); 9297 } 9298 } 9299 9300 static struct ibm_struct mute_led_driver_data = { 9301 .name = "mute_led", 9302 .exit = mute_led_exit, 9303 .resume = mute_led_resume, 9304 }; 9305 9306 /* 9307 * Battery Wear Control Driver 9308 * Contact: Ognjen Galic <smclt30p@gmail.com> 9309 */ 9310 9311 /* Metadata */ 9312 9313 #define GET_START "BCTG" 9314 #define SET_START "BCCS" 9315 #define GET_STOP "BCSG" 9316 #define SET_STOP "BCSS" 9317 9318 #define START_ATTR "charge_start_threshold" 9319 #define STOP_ATTR "charge_stop_threshold" 9320 9321 enum { 9322 BAT_ANY = 0, 9323 BAT_PRIMARY = 1, 9324 BAT_SECONDARY = 2 9325 }; 9326 9327 enum { 9328 /* Error condition bit */ 9329 METHOD_ERR = BIT(31), 9330 }; 9331 9332 enum { 9333 /* This is used in the get/set helpers */ 9334 THRESHOLD_START, 9335 THRESHOLD_STOP, 9336 }; 9337 9338 struct tpacpi_battery_data { 9339 int charge_start; 9340 int start_support; 9341 int charge_stop; 9342 int stop_support; 9343 }; 9344 9345 struct tpacpi_battery_driver_data { 9346 struct tpacpi_battery_data batteries[3]; 9347 int individual_addressing; 9348 }; 9349 9350 static struct tpacpi_battery_driver_data battery_info; 9351 9352 /* ACPI helpers/functions/probes */ 9353 9354 /** 9355 * This evaluates a ACPI method call specific to the battery 9356 * ACPI extension. The specifics are that an error is marked 9357 * in the 32rd bit of the response, so we just check that here. 9358 */ 9359 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param) 9360 { 9361 int response; 9362 9363 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) { 9364 acpi_handle_err(hkey_handle, "%s: evaluate failed", method); 9365 return AE_ERROR; 9366 } 9367 if (response & METHOD_ERR) { 9368 acpi_handle_err(hkey_handle, 9369 "%s evaluated but flagged as error", method); 9370 return AE_ERROR; 9371 } 9372 *ret = response; 9373 return AE_OK; 9374 } 9375 9376 static int tpacpi_battery_get(int what, int battery, int *ret) 9377 { 9378 switch (what) { 9379 case THRESHOLD_START: 9380 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery)) 9381 return -ENODEV; 9382 9383 /* The value is in the low 8 bits of the response */ 9384 *ret = *ret & 0xFF; 9385 return 0; 9386 case THRESHOLD_STOP: 9387 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery)) 9388 return -ENODEV; 9389 /* Value is in lower 8 bits */ 9390 *ret = *ret & 0xFF; 9391 /* 9392 * On the stop value, if we return 0 that 9393 * does not make any sense. 0 means Default, which 9394 * means that charging stops at 100%, so we return 9395 * that. 9396 */ 9397 if (*ret == 0) 9398 *ret = 100; 9399 return 0; 9400 default: 9401 pr_crit("wrong parameter: %d", what); 9402 return -EINVAL; 9403 } 9404 } 9405 9406 static int tpacpi_battery_set(int what, int battery, int value) 9407 { 9408 int param, ret; 9409 /* The first 8 bits are the value of the threshold */ 9410 param = value; 9411 /* The battery ID is in bits 8-9, 2 bits */ 9412 param |= battery << 8; 9413 9414 switch (what) { 9415 case THRESHOLD_START: 9416 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) { 9417 pr_err("failed to set charge threshold on battery %d", 9418 battery); 9419 return -ENODEV; 9420 } 9421 return 0; 9422 case THRESHOLD_STOP: 9423 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) { 9424 pr_err("failed to set stop threshold: %d", battery); 9425 return -ENODEV; 9426 } 9427 return 0; 9428 default: 9429 pr_crit("wrong parameter: %d", what); 9430 return -EINVAL; 9431 } 9432 } 9433 9434 static int tpacpi_battery_probe(int battery) 9435 { 9436 int ret = 0; 9437 9438 memset(&battery_info.batteries[battery], 0, 9439 sizeof(battery_info.batteries[battery])); 9440 9441 /* 9442 * 1) Get the current start threshold 9443 * 2) Check for support 9444 * 3) Get the current stop threshold 9445 * 4) Check for support 9446 */ 9447 if (acpi_has_method(hkey_handle, GET_START)) { 9448 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { 9449 pr_err("Error probing battery %d\n", battery); 9450 return -ENODEV; 9451 } 9452 /* Individual addressing is in bit 9 */ 9453 if (ret & BIT(9)) 9454 battery_info.individual_addressing = true; 9455 /* Support is marked in bit 8 */ 9456 if (ret & BIT(8)) 9457 battery_info.batteries[battery].start_support = 1; 9458 else 9459 return -ENODEV; 9460 if (tpacpi_battery_get(THRESHOLD_START, battery, 9461 &battery_info.batteries[battery].charge_start)) { 9462 pr_err("Error probing battery %d\n", battery); 9463 return -ENODEV; 9464 } 9465 } 9466 if (acpi_has_method(hkey_handle, GET_STOP)) { 9467 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) { 9468 pr_err("Error probing battery stop; %d\n", battery); 9469 return -ENODEV; 9470 } 9471 /* Support is marked in bit 8 */ 9472 if (ret & BIT(8)) 9473 battery_info.batteries[battery].stop_support = 1; 9474 else 9475 return -ENODEV; 9476 if (tpacpi_battery_get(THRESHOLD_STOP, battery, 9477 &battery_info.batteries[battery].charge_stop)) { 9478 pr_err("Error probing battery stop: %d\n", battery); 9479 return -ENODEV; 9480 } 9481 } 9482 pr_info("battery %d registered (start %d, stop %d)", 9483 battery, 9484 battery_info.batteries[battery].charge_start, 9485 battery_info.batteries[battery].charge_stop); 9486 9487 return 0; 9488 } 9489 9490 /* General helper functions */ 9491 9492 static int tpacpi_battery_get_id(const char *battery_name) 9493 { 9494 9495 if (strcmp(battery_name, "BAT0") == 0 || 9496 tp_features.battery_force_primary) 9497 return BAT_PRIMARY; 9498 if (strcmp(battery_name, "BAT1") == 0) 9499 return BAT_SECONDARY; 9500 /* 9501 * If for some reason the battery is not BAT0 nor is it 9502 * BAT1, we will assume it's the default, first battery, 9503 * AKA primary. 9504 */ 9505 pr_warn("unknown battery %s, assuming primary", battery_name); 9506 return BAT_PRIMARY; 9507 } 9508 9509 /* sysfs interface */ 9510 9511 static ssize_t tpacpi_battery_store(int what, 9512 struct device *dev, 9513 const char *buf, size_t count) 9514 { 9515 struct power_supply *supply = to_power_supply(dev); 9516 unsigned long value; 9517 int battery, rval; 9518 /* 9519 * Some systems have support for more than 9520 * one battery. If that is the case, 9521 * tpacpi_battery_probe marked that addressing 9522 * them individually is supported, so we do that 9523 * based on the device struct. 9524 * 9525 * On systems that are not supported, we assume 9526 * the primary as most of the ACPI calls fail 9527 * with "Any Battery" as the parameter. 9528 */ 9529 if (battery_info.individual_addressing) 9530 /* BAT_PRIMARY or BAT_SECONDARY */ 9531 battery = tpacpi_battery_get_id(supply->desc->name); 9532 else 9533 battery = BAT_PRIMARY; 9534 9535 rval = kstrtoul(buf, 10, &value); 9536 if (rval) 9537 return rval; 9538 9539 switch (what) { 9540 case THRESHOLD_START: 9541 if (!battery_info.batteries[battery].start_support) 9542 return -ENODEV; 9543 /* valid values are [0, 99] */ 9544 if (value > 99) 9545 return -EINVAL; 9546 if (value > battery_info.batteries[battery].charge_stop) 9547 return -EINVAL; 9548 if (tpacpi_battery_set(THRESHOLD_START, battery, value)) 9549 return -ENODEV; 9550 battery_info.batteries[battery].charge_start = value; 9551 return count; 9552 9553 case THRESHOLD_STOP: 9554 if (!battery_info.batteries[battery].stop_support) 9555 return -ENODEV; 9556 /* valid values are [1, 100] */ 9557 if (value < 1 || value > 100) 9558 return -EINVAL; 9559 if (value < battery_info.batteries[battery].charge_start) 9560 return -EINVAL; 9561 battery_info.batteries[battery].charge_stop = value; 9562 /* 9563 * When 100 is passed to stop, we need to flip 9564 * it to 0 as that the EC understands that as 9565 * "Default", which will charge to 100% 9566 */ 9567 if (value == 100) 9568 value = 0; 9569 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value)) 9570 return -EINVAL; 9571 return count; 9572 default: 9573 pr_crit("Wrong parameter: %d", what); 9574 return -EINVAL; 9575 } 9576 return count; 9577 } 9578 9579 static ssize_t tpacpi_battery_show(int what, 9580 struct device *dev, 9581 char *buf) 9582 { 9583 struct power_supply *supply = to_power_supply(dev); 9584 int ret, battery; 9585 /* 9586 * Some systems have support for more than 9587 * one battery. If that is the case, 9588 * tpacpi_battery_probe marked that addressing 9589 * them individually is supported, so we; 9590 * based on the device struct. 9591 * 9592 * On systems that are not supported, we assume 9593 * the primary as most of the ACPI calls fail 9594 * with "Any Battery" as the parameter. 9595 */ 9596 if (battery_info.individual_addressing) 9597 /* BAT_PRIMARY or BAT_SECONDARY */ 9598 battery = tpacpi_battery_get_id(supply->desc->name); 9599 else 9600 battery = BAT_PRIMARY; 9601 if (tpacpi_battery_get(what, battery, &ret)) 9602 return -ENODEV; 9603 return sprintf(buf, "%d\n", ret); 9604 } 9605 9606 static ssize_t charge_start_threshold_show(struct device *device, 9607 struct device_attribute *attr, 9608 char *buf) 9609 { 9610 return tpacpi_battery_show(THRESHOLD_START, device, buf); 9611 } 9612 9613 static ssize_t charge_stop_threshold_show(struct device *device, 9614 struct device_attribute *attr, 9615 char *buf) 9616 { 9617 return tpacpi_battery_show(THRESHOLD_STOP, device, buf); 9618 } 9619 9620 static ssize_t charge_start_threshold_store(struct device *dev, 9621 struct device_attribute *attr, 9622 const char *buf, size_t count) 9623 { 9624 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count); 9625 } 9626 9627 static ssize_t charge_stop_threshold_store(struct device *dev, 9628 struct device_attribute *attr, 9629 const char *buf, size_t count) 9630 { 9631 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count); 9632 } 9633 9634 static DEVICE_ATTR_RW(charge_start_threshold); 9635 static DEVICE_ATTR_RW(charge_stop_threshold); 9636 9637 static struct attribute *tpacpi_battery_attrs[] = { 9638 &dev_attr_charge_start_threshold.attr, 9639 &dev_attr_charge_stop_threshold.attr, 9640 NULL, 9641 }; 9642 9643 ATTRIBUTE_GROUPS(tpacpi_battery); 9644 9645 /* ACPI battery hooking */ 9646 9647 static int tpacpi_battery_add(struct power_supply *battery) 9648 { 9649 int batteryid = tpacpi_battery_get_id(battery->desc->name); 9650 9651 if (tpacpi_battery_probe(batteryid)) 9652 return -ENODEV; 9653 if (device_add_groups(&battery->dev, tpacpi_battery_groups)) 9654 return -ENODEV; 9655 return 0; 9656 } 9657 9658 static int tpacpi_battery_remove(struct power_supply *battery) 9659 { 9660 device_remove_groups(&battery->dev, tpacpi_battery_groups); 9661 return 0; 9662 } 9663 9664 static struct acpi_battery_hook battery_hook = { 9665 .add_battery = tpacpi_battery_add, 9666 .remove_battery = tpacpi_battery_remove, 9667 .name = "ThinkPad Battery Extension", 9668 }; 9669 9670 /* Subdriver init/exit */ 9671 9672 static const struct tpacpi_quirk battery_quirk_table[] __initconst = { 9673 /* 9674 * Individual addressing is broken on models that expose the 9675 * primary battery as BAT1. 9676 */ 9677 TPACPI_Q_LNV('J', '7', true), /* B5400 */ 9678 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */ 9679 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */ 9680 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */ 9681 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */ 9682 }; 9683 9684 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm) 9685 { 9686 memset(&battery_info, 0, sizeof(battery_info)); 9687 9688 tp_features.battery_force_primary = tpacpi_check_quirks( 9689 battery_quirk_table, 9690 ARRAY_SIZE(battery_quirk_table)); 9691 9692 battery_hook_register(&battery_hook); 9693 return 0; 9694 } 9695 9696 static void tpacpi_battery_exit(void) 9697 { 9698 battery_hook_unregister(&battery_hook); 9699 } 9700 9701 static struct ibm_struct battery_driver_data = { 9702 .name = "battery", 9703 .exit = tpacpi_battery_exit, 9704 }; 9705 9706 /************************************************************************* 9707 * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature 9708 */ 9709 9710 static int lcdshadow_state; 9711 9712 static int lcdshadow_on_off(bool state) 9713 { 9714 acpi_handle set_shadow_handle; 9715 int output; 9716 9717 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSSS", &set_shadow_handle))) { 9718 pr_warn("Thinkpad ACPI has no %s interface.\n", "SSSS"); 9719 return -EIO; 9720 } 9721 9722 if (!acpi_evalf(set_shadow_handle, &output, NULL, "dd", (int)state)) 9723 return -EIO; 9724 9725 lcdshadow_state = state; 9726 return 0; 9727 } 9728 9729 static int lcdshadow_set(bool on) 9730 { 9731 if (lcdshadow_state < 0) 9732 return lcdshadow_state; 9733 if (lcdshadow_state == on) 9734 return 0; 9735 return lcdshadow_on_off(on); 9736 } 9737 9738 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm) 9739 { 9740 acpi_handle get_shadow_handle; 9741 int output; 9742 9743 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSSS", &get_shadow_handle))) { 9744 lcdshadow_state = -ENODEV; 9745 return 0; 9746 } 9747 9748 if (!acpi_evalf(get_shadow_handle, &output, NULL, "dd", 0)) { 9749 lcdshadow_state = -EIO; 9750 return -EIO; 9751 } 9752 if (!(output & 0x10000)) { 9753 lcdshadow_state = -ENODEV; 9754 return 0; 9755 } 9756 lcdshadow_state = output & 0x1; 9757 9758 return 0; 9759 } 9760 9761 static void lcdshadow_resume(void) 9762 { 9763 if (lcdshadow_state >= 0) 9764 lcdshadow_on_off(lcdshadow_state); 9765 } 9766 9767 static int lcdshadow_read(struct seq_file *m) 9768 { 9769 if (lcdshadow_state < 0) { 9770 seq_puts(m, "status:\t\tnot supported\n"); 9771 } else { 9772 seq_printf(m, "status:\t\t%d\n", lcdshadow_state); 9773 seq_puts(m, "commands:\t0, 1\n"); 9774 } 9775 9776 return 0; 9777 } 9778 9779 static int lcdshadow_write(char *buf) 9780 { 9781 char *cmd; 9782 int res, state = -EINVAL; 9783 9784 if (lcdshadow_state < 0) 9785 return -ENODEV; 9786 9787 while ((cmd = strsep(&buf, ","))) { 9788 res = kstrtoint(cmd, 10, &state); 9789 if (res < 0) 9790 return res; 9791 } 9792 9793 if (state >= 2 || state < 0) 9794 return -EINVAL; 9795 9796 return lcdshadow_set(state); 9797 } 9798 9799 static struct ibm_struct lcdshadow_driver_data = { 9800 .name = "lcdshadow", 9801 .resume = lcdshadow_resume, 9802 .read = lcdshadow_read, 9803 .write = lcdshadow_write, 9804 }; 9805 9806 /**************************************************************************** 9807 **************************************************************************** 9808 * 9809 * Infrastructure 9810 * 9811 **************************************************************************** 9812 ****************************************************************************/ 9813 9814 /* 9815 * HKEY event callout for other subdrivers go here 9816 * (yes, it is ugly, but it is quick, safe, and gets the job done 9817 */ 9818 static void tpacpi_driver_event(const unsigned int hkey_event) 9819 { 9820 if (ibm_backlight_device) { 9821 switch (hkey_event) { 9822 case TP_HKEY_EV_BRGHT_UP: 9823 case TP_HKEY_EV_BRGHT_DOWN: 9824 tpacpi_brightness_notify_change(); 9825 } 9826 } 9827 if (alsa_card) { 9828 switch (hkey_event) { 9829 case TP_HKEY_EV_VOL_UP: 9830 case TP_HKEY_EV_VOL_DOWN: 9831 case TP_HKEY_EV_VOL_MUTE: 9832 volume_alsa_notify_change(); 9833 } 9834 } 9835 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) { 9836 enum led_brightness brightness; 9837 9838 mutex_lock(&kbdlight_mutex); 9839 9840 /* 9841 * Check the brightness actually changed, setting the brightness 9842 * through kbdlight_set_level() also triggers this event. 9843 */ 9844 brightness = kbdlight_sysfs_get(NULL); 9845 if (kbdlight_brightness != brightness) { 9846 kbdlight_brightness = brightness; 9847 led_classdev_notify_brightness_hw_changed( 9848 &tpacpi_led_kbdlight.led_classdev, brightness); 9849 } 9850 9851 mutex_unlock(&kbdlight_mutex); 9852 } 9853 } 9854 9855 static void hotkey_driver_event(const unsigned int scancode) 9856 { 9857 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9858 } 9859 9860 /* --------------------------------------------------------------------- */ 9861 9862 /* /proc support */ 9863 static struct proc_dir_entry *proc_dir; 9864 9865 /* 9866 * Module and infrastructure proble, init and exit handling 9867 */ 9868 9869 static bool force_load; 9870 9871 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9872 static const char * __init str_supported(int is_supported) 9873 { 9874 static char text_unsupported[] __initdata = "not supported"; 9875 9876 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9877 } 9878 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9879 9880 static void ibm_exit(struct ibm_struct *ibm) 9881 { 9882 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9883 9884 list_del_init(&ibm->all_drivers); 9885 9886 if (ibm->flags.acpi_notify_installed) { 9887 dbg_printk(TPACPI_DBG_EXIT, 9888 "%s: acpi_remove_notify_handler\n", ibm->name); 9889 BUG_ON(!ibm->acpi); 9890 acpi_remove_notify_handler(*ibm->acpi->handle, 9891 ibm->acpi->type, 9892 dispatch_acpi_notify); 9893 ibm->flags.acpi_notify_installed = 0; 9894 } 9895 9896 if (ibm->flags.proc_created) { 9897 dbg_printk(TPACPI_DBG_EXIT, 9898 "%s: remove_proc_entry\n", ibm->name); 9899 remove_proc_entry(ibm->name, proc_dir); 9900 ibm->flags.proc_created = 0; 9901 } 9902 9903 if (ibm->flags.acpi_driver_registered) { 9904 dbg_printk(TPACPI_DBG_EXIT, 9905 "%s: acpi_bus_unregister_driver\n", ibm->name); 9906 BUG_ON(!ibm->acpi); 9907 acpi_bus_unregister_driver(ibm->acpi->driver); 9908 kfree(ibm->acpi->driver); 9909 ibm->acpi->driver = NULL; 9910 ibm->flags.acpi_driver_registered = 0; 9911 } 9912 9913 if (ibm->flags.init_called && ibm->exit) { 9914 ibm->exit(); 9915 ibm->flags.init_called = 0; 9916 } 9917 9918 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9919 } 9920 9921 static int __init ibm_init(struct ibm_init_struct *iibm) 9922 { 9923 int ret; 9924 struct ibm_struct *ibm = iibm->data; 9925 struct proc_dir_entry *entry; 9926 9927 BUG_ON(ibm == NULL); 9928 9929 INIT_LIST_HEAD(&ibm->all_drivers); 9930 9931 if (ibm->flags.experimental && !experimental) 9932 return 0; 9933 9934 dbg_printk(TPACPI_DBG_INIT, 9935 "probing for %s\n", ibm->name); 9936 9937 if (iibm->init) { 9938 ret = iibm->init(iibm); 9939 if (ret > 0) 9940 return 0; /* probe failed */ 9941 if (ret) 9942 return ret; 9943 9944 ibm->flags.init_called = 1; 9945 } 9946 9947 if (ibm->acpi) { 9948 if (ibm->acpi->hid) { 9949 ret = register_tpacpi_subdriver(ibm); 9950 if (ret) 9951 goto err_out; 9952 } 9953 9954 if (ibm->acpi->notify) { 9955 ret = setup_acpi_notify(ibm); 9956 if (ret == -ENODEV) { 9957 pr_notice("disabling subdriver %s\n", 9958 ibm->name); 9959 ret = 0; 9960 goto err_out; 9961 } 9962 if (ret < 0) 9963 goto err_out; 9964 } 9965 } 9966 9967 dbg_printk(TPACPI_DBG_INIT, 9968 "%s installed\n", ibm->name); 9969 9970 if (ibm->read) { 9971 umode_t mode = iibm->base_procfs_mode; 9972 9973 if (!mode) 9974 mode = S_IRUGO; 9975 if (ibm->write) 9976 mode |= S_IWUSR; 9977 entry = proc_create_data(ibm->name, mode, proc_dir, 9978 &dispatch_proc_ops, ibm); 9979 if (!entry) { 9980 pr_err("unable to create proc entry %s\n", ibm->name); 9981 ret = -ENODEV; 9982 goto err_out; 9983 } 9984 ibm->flags.proc_created = 1; 9985 } 9986 9987 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9988 9989 return 0; 9990 9991 err_out: 9992 dbg_printk(TPACPI_DBG_INIT, 9993 "%s: at error exit path with result %d\n", 9994 ibm->name, ret); 9995 9996 ibm_exit(ibm); 9997 return (ret < 0) ? ret : 0; 9998 } 9999 10000 /* Probing */ 10001 10002 static char __init tpacpi_parse_fw_id(const char * const s, 10003 u32 *model, u16 *release) 10004 { 10005 int i; 10006 10007 if (!s || strlen(s) < 8) 10008 goto invalid; 10009 10010 for (i = 0; i < 8; i++) 10011 if (!((s[i] >= '0' && s[i] <= '9') || 10012 (s[i] >= 'A' && s[i] <= 'Z'))) 10013 goto invalid; 10014 10015 /* 10016 * Most models: xxyTkkWW (#.##c) 10017 * Ancient 570/600 and -SL lacks (#.##c) 10018 */ 10019 if (s[3] == 'T' || s[3] == 'N') { 10020 *model = TPID(s[0], s[1]); 10021 *release = TPVER(s[4], s[5]); 10022 return s[2]; 10023 10024 /* New models: xxxyTkkW (#.##c); T550 and some others */ 10025 } else if (s[4] == 'T' || s[4] == 'N') { 10026 *model = TPID3(s[0], s[1], s[2]); 10027 *release = TPVER(s[5], s[6]); 10028 return s[3]; 10029 } 10030 10031 invalid: 10032 return '\0'; 10033 } 10034 10035 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private) 10036 { 10037 char *ec_fw_string = (char *) private; 10038 const char *dmi_data = (const char *)dm; 10039 /* 10040 * ThinkPad Embedded Controller Program Table on newer models 10041 * 10042 * Offset | Name | Width | Description 10043 * ---------------------------------------------------- 10044 * 0x00 | Type | BYTE | 0x8C 10045 * 0x01 | Length | BYTE | 10046 * 0x02 | Handle | WORD | Varies 10047 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO" 10048 * 0x0A | OEM struct offset | BYTE | 0x0B 10049 * 0x0B | OEM struct number | BYTE | 0x07, for this structure 10050 * 0x0C | OEM struct revision | BYTE | 0x01, for this format 10051 * 0x0D | ECP version ID | STR ID | 10052 * 0x0E | ECP release date | STR ID | 10053 */ 10054 10055 /* Return if data structure not match */ 10056 if (dm->type != 140 || dm->length < 0x0F || 10057 memcmp(dmi_data + 4, "LENOVO", 6) != 0 || 10058 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 || 10059 dmi_data[0x0C] != 0x01) 10060 return; 10061 10062 /* fwstr is the first 8byte string */ 10063 strncpy(ec_fw_string, dmi_data + 0x0F, 8); 10064 } 10065 10066 /* returns 0 - probe ok, or < 0 - probe error. 10067 * Probe ok doesn't mean thinkpad found. 10068 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 10069 static int __must_check __init get_thinkpad_model_data( 10070 struct thinkpad_id_data *tp) 10071 { 10072 const struct dmi_device *dev = NULL; 10073 char ec_fw_string[18] = {0}; 10074 char const *s; 10075 char t; 10076 10077 if (!tp) 10078 return -EINVAL; 10079 10080 memset(tp, 0, sizeof(*tp)); 10081 10082 if (dmi_name_in_vendors("IBM")) 10083 tp->vendor = PCI_VENDOR_ID_IBM; 10084 else if (dmi_name_in_vendors("LENOVO")) 10085 tp->vendor = PCI_VENDOR_ID_LENOVO; 10086 else 10087 return 0; 10088 10089 s = dmi_get_system_info(DMI_BIOS_VERSION); 10090 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 10091 if (s && !tp->bios_version_str) 10092 return -ENOMEM; 10093 10094 /* Really ancient ThinkPad 240X will fail this, which is fine */ 10095 t = tpacpi_parse_fw_id(tp->bios_version_str, 10096 &tp->bios_model, &tp->bios_release); 10097 if (t != 'E' && t != 'C') 10098 return 0; 10099 10100 /* 10101 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 10102 * X32 or newer, all Z series; Some models must have an 10103 * up-to-date BIOS or they will not be detected. 10104 * 10105 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10106 */ 10107 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 10108 if (sscanf(dev->name, 10109 "IBM ThinkPad Embedded Controller -[%17c", 10110 ec_fw_string) == 1) { 10111 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 10112 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 10113 break; 10114 } 10115 } 10116 10117 /* Newer ThinkPads have different EC program info table */ 10118 if (!ec_fw_string[0]) 10119 dmi_walk(find_new_ec_fwstr, &ec_fw_string); 10120 10121 if (ec_fw_string[0]) { 10122 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 10123 if (!tp->ec_version_str) 10124 return -ENOMEM; 10125 10126 t = tpacpi_parse_fw_id(ec_fw_string, 10127 &tp->ec_model, &tp->ec_release); 10128 if (t != 'H') { 10129 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n", 10130 ec_fw_string); 10131 pr_notice("please report this to %s\n", TPACPI_MAIL); 10132 } 10133 } 10134 10135 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 10136 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 10137 tp->model_str = kstrdup(s, GFP_KERNEL); 10138 if (!tp->model_str) 10139 return -ENOMEM; 10140 } else { 10141 s = dmi_get_system_info(DMI_BIOS_VENDOR); 10142 if (s && !(strncasecmp(s, "Lenovo", 6))) { 10143 tp->model_str = kstrdup(s, GFP_KERNEL); 10144 if (!tp->model_str) 10145 return -ENOMEM; 10146 } 10147 } 10148 10149 s = dmi_get_system_info(DMI_PRODUCT_NAME); 10150 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 10151 if (s && !tp->nummodel_str) 10152 return -ENOMEM; 10153 10154 return 0; 10155 } 10156 10157 static int __init probe_for_thinkpad(void) 10158 { 10159 int is_thinkpad; 10160 10161 if (acpi_disabled) 10162 return -ENODEV; 10163 10164 /* It would be dangerous to run the driver in this case */ 10165 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 10166 return -ENODEV; 10167 10168 /* 10169 * Non-ancient models have better DMI tagging, but very old models 10170 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 10171 */ 10172 is_thinkpad = (thinkpad_id.model_str != NULL) || 10173 (thinkpad_id.ec_model != 0) || 10174 tpacpi_is_fw_known(); 10175 10176 /* The EC handler is required */ 10177 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 10178 if (!ec_handle) { 10179 if (is_thinkpad) 10180 pr_err("Not yet supported ThinkPad detected!\n"); 10181 return -ENODEV; 10182 } 10183 10184 if (!is_thinkpad && !force_load) 10185 return -ENODEV; 10186 10187 return 0; 10188 } 10189 10190 static void __init thinkpad_acpi_init_banner(void) 10191 { 10192 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 10193 pr_info("%s\n", TPACPI_URL); 10194 10195 pr_info("ThinkPad BIOS %s, EC %s\n", 10196 (thinkpad_id.bios_version_str) ? 10197 thinkpad_id.bios_version_str : "unknown", 10198 (thinkpad_id.ec_version_str) ? 10199 thinkpad_id.ec_version_str : "unknown"); 10200 10201 BUG_ON(!thinkpad_id.vendor); 10202 10203 if (thinkpad_id.model_str) 10204 pr_info("%s %s, model %s\n", 10205 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 10206 "IBM" : ((thinkpad_id.vendor == 10207 PCI_VENDOR_ID_LENOVO) ? 10208 "Lenovo" : "Unknown vendor"), 10209 thinkpad_id.model_str, 10210 (thinkpad_id.nummodel_str) ? 10211 thinkpad_id.nummodel_str : "unknown"); 10212 } 10213 10214 /* Module init, exit, parameters */ 10215 10216 static struct ibm_init_struct ibms_init[] __initdata = { 10217 { 10218 .data = &thinkpad_acpi_driver_data, 10219 }, 10220 { 10221 .init = hotkey_init, 10222 .data = &hotkey_driver_data, 10223 }, 10224 { 10225 .init = bluetooth_init, 10226 .data = &bluetooth_driver_data, 10227 }, 10228 { 10229 .init = wan_init, 10230 .data = &wan_driver_data, 10231 }, 10232 { 10233 .init = uwb_init, 10234 .data = &uwb_driver_data, 10235 }, 10236 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 10237 { 10238 .init = video_init, 10239 .base_procfs_mode = S_IRUSR, 10240 .data = &video_driver_data, 10241 }, 10242 #endif 10243 { 10244 .init = kbdlight_init, 10245 .data = &kbdlight_driver_data, 10246 }, 10247 { 10248 .init = light_init, 10249 .data = &light_driver_data, 10250 }, 10251 { 10252 .init = cmos_init, 10253 .data = &cmos_driver_data, 10254 }, 10255 { 10256 .init = led_init, 10257 .data = &led_driver_data, 10258 }, 10259 { 10260 .init = beep_init, 10261 .data = &beep_driver_data, 10262 }, 10263 { 10264 .init = thermal_init, 10265 .data = &thermal_driver_data, 10266 }, 10267 { 10268 .init = brightness_init, 10269 .data = &brightness_driver_data, 10270 }, 10271 { 10272 .init = volume_init, 10273 .data = &volume_driver_data, 10274 }, 10275 { 10276 .init = fan_init, 10277 .data = &fan_driver_data, 10278 }, 10279 { 10280 .init = mute_led_init, 10281 .data = &mute_led_driver_data, 10282 }, 10283 { 10284 .init = tpacpi_battery_init, 10285 .data = &battery_driver_data, 10286 }, 10287 { 10288 .init = tpacpi_lcdshadow_init, 10289 .data = &lcdshadow_driver_data, 10290 }, 10291 }; 10292 10293 static int __init set_ibm_param(const char *val, const struct kernel_param *kp) 10294 { 10295 unsigned int i; 10296 struct ibm_struct *ibm; 10297 10298 if (!kp || !kp->name || !val) 10299 return -EINVAL; 10300 10301 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10302 ibm = ibms_init[i].data; 10303 WARN_ON(ibm == NULL); 10304 10305 if (!ibm || !ibm->name) 10306 continue; 10307 10308 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 10309 if (strlen(val) > sizeof(ibms_init[i].param) - 1) 10310 return -ENOSPC; 10311 strcpy(ibms_init[i].param, val); 10312 return 0; 10313 } 10314 } 10315 10316 return -EINVAL; 10317 } 10318 10319 module_param(experimental, int, 0444); 10320 MODULE_PARM_DESC(experimental, 10321 "Enables experimental features when non-zero"); 10322 10323 module_param_named(debug, dbg_level, uint, 0); 10324 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 10325 10326 module_param(force_load, bool, 0444); 10327 MODULE_PARM_DESC(force_load, 10328 "Attempts to load the driver even on a mis-identified ThinkPad when true"); 10329 10330 module_param_named(fan_control, fan_control_allowed, bool, 0444); 10331 MODULE_PARM_DESC(fan_control, 10332 "Enables setting fan parameters features when true"); 10333 10334 module_param_named(brightness_mode, brightness_mode, uint, 0444); 10335 MODULE_PARM_DESC(brightness_mode, 10336 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 10337 10338 module_param(brightness_enable, uint, 0444); 10339 MODULE_PARM_DESC(brightness_enable, 10340 "Enables backlight control when 1, disables when 0"); 10341 10342 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 10343 module_param_named(volume_mode, volume_mode, uint, 0444); 10344 MODULE_PARM_DESC(volume_mode, 10345 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 10346 10347 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 10348 MODULE_PARM_DESC(volume_capabilities, 10349 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only"); 10350 10351 module_param_named(volume_control, volume_control_allowed, bool, 0444); 10352 MODULE_PARM_DESC(volume_control, 10353 "Enables software override for the console audio control when true"); 10354 10355 module_param_named(software_mute, software_mute_requested, bool, 0444); 10356 MODULE_PARM_DESC(software_mute, 10357 "Request full software mute control"); 10358 10359 /* ALSA module API parameters */ 10360 module_param_named(index, alsa_index, int, 0444); 10361 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 10362 module_param_named(id, alsa_id, charp, 0444); 10363 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 10364 module_param_named(enable, alsa_enable, bool, 0444); 10365 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 10366 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 10367 10368 /* The module parameter can't be read back, that's why 0 is used here */ 10369 #define TPACPI_PARAM(feature) \ 10370 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 10371 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation") 10372 10373 TPACPI_PARAM(hotkey); 10374 TPACPI_PARAM(bluetooth); 10375 TPACPI_PARAM(video); 10376 TPACPI_PARAM(light); 10377 TPACPI_PARAM(cmos); 10378 TPACPI_PARAM(led); 10379 TPACPI_PARAM(beep); 10380 TPACPI_PARAM(brightness); 10381 TPACPI_PARAM(volume); 10382 TPACPI_PARAM(fan); 10383 10384 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10385 module_param(dbg_wlswemul, uint, 0444); 10386 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 10387 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 10388 MODULE_PARM_DESC(wlsw_state, 10389 "Initial state of the emulated WLSW switch"); 10390 10391 module_param(dbg_bluetoothemul, uint, 0444); 10392 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 10393 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 10394 MODULE_PARM_DESC(bluetooth_state, 10395 "Initial state of the emulated bluetooth switch"); 10396 10397 module_param(dbg_wwanemul, uint, 0444); 10398 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 10399 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 10400 MODULE_PARM_DESC(wwan_state, 10401 "Initial state of the emulated WWAN switch"); 10402 10403 module_param(dbg_uwbemul, uint, 0444); 10404 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 10405 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 10406 MODULE_PARM_DESC(uwb_state, 10407 "Initial state of the emulated UWB switch"); 10408 #endif 10409 10410 static void thinkpad_acpi_module_exit(void) 10411 { 10412 struct ibm_struct *ibm, *itmp; 10413 10414 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 10415 10416 list_for_each_entry_safe_reverse(ibm, itmp, 10417 &tpacpi_all_drivers, 10418 all_drivers) { 10419 ibm_exit(ibm); 10420 } 10421 10422 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 10423 10424 if (tpacpi_inputdev) { 10425 if (tp_features.input_device_registered) 10426 input_unregister_device(tpacpi_inputdev); 10427 else 10428 input_free_device(tpacpi_inputdev); 10429 kfree(hotkey_keycode_map); 10430 } 10431 10432 if (tpacpi_hwmon) 10433 hwmon_device_unregister(tpacpi_hwmon); 10434 10435 if (tpacpi_sensors_pdev) 10436 platform_device_unregister(tpacpi_sensors_pdev); 10437 if (tpacpi_pdev) 10438 platform_device_unregister(tpacpi_pdev); 10439 10440 if (tp_features.sensors_pdrv_attrs_registered) 10441 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 10442 if (tp_features.platform_drv_attrs_registered) 10443 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 10444 10445 if (tp_features.sensors_pdrv_registered) 10446 platform_driver_unregister(&tpacpi_hwmon_pdriver); 10447 10448 if (tp_features.platform_drv_registered) 10449 platform_driver_unregister(&tpacpi_pdriver); 10450 10451 if (proc_dir) 10452 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 10453 10454 if (tpacpi_wq) 10455 destroy_workqueue(tpacpi_wq); 10456 10457 kfree(thinkpad_id.bios_version_str); 10458 kfree(thinkpad_id.ec_version_str); 10459 kfree(thinkpad_id.model_str); 10460 kfree(thinkpad_id.nummodel_str); 10461 } 10462 10463 10464 static int __init thinkpad_acpi_module_init(void) 10465 { 10466 int ret, i; 10467 10468 tpacpi_lifecycle = TPACPI_LIFE_INIT; 10469 10470 /* Driver-level probe */ 10471 10472 ret = get_thinkpad_model_data(&thinkpad_id); 10473 if (ret) { 10474 pr_err("unable to get DMI data: %d\n", ret); 10475 thinkpad_acpi_module_exit(); 10476 return ret; 10477 } 10478 ret = probe_for_thinkpad(); 10479 if (ret) { 10480 thinkpad_acpi_module_exit(); 10481 return ret; 10482 } 10483 10484 /* Driver initialization */ 10485 10486 thinkpad_acpi_init_banner(); 10487 tpacpi_check_outdated_fw(); 10488 10489 TPACPI_ACPIHANDLE_INIT(ecrd); 10490 TPACPI_ACPIHANDLE_INIT(ecwr); 10491 10492 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 10493 if (!tpacpi_wq) { 10494 thinkpad_acpi_module_exit(); 10495 return -ENOMEM; 10496 } 10497 10498 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 10499 if (!proc_dir) { 10500 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 10501 thinkpad_acpi_module_exit(); 10502 return -ENODEV; 10503 } 10504 10505 ret = platform_driver_register(&tpacpi_pdriver); 10506 if (ret) { 10507 pr_err("unable to register main platform driver\n"); 10508 thinkpad_acpi_module_exit(); 10509 return ret; 10510 } 10511 tp_features.platform_drv_registered = 1; 10512 10513 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 10514 if (ret) { 10515 pr_err("unable to register hwmon platform driver\n"); 10516 thinkpad_acpi_module_exit(); 10517 return ret; 10518 } 10519 tp_features.sensors_pdrv_registered = 1; 10520 10521 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 10522 if (!ret) { 10523 tp_features.platform_drv_attrs_registered = 1; 10524 ret = tpacpi_create_driver_attributes( 10525 &tpacpi_hwmon_pdriver.driver); 10526 } 10527 if (ret) { 10528 pr_err("unable to create sysfs driver attributes\n"); 10529 thinkpad_acpi_module_exit(); 10530 return ret; 10531 } 10532 tp_features.sensors_pdrv_attrs_registered = 1; 10533 10534 10535 /* Device initialization */ 10536 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 10537 NULL, 0); 10538 if (IS_ERR(tpacpi_pdev)) { 10539 ret = PTR_ERR(tpacpi_pdev); 10540 tpacpi_pdev = NULL; 10541 pr_err("unable to register platform device\n"); 10542 thinkpad_acpi_module_exit(); 10543 return ret; 10544 } 10545 tpacpi_sensors_pdev = platform_device_register_simple( 10546 TPACPI_HWMON_DRVR_NAME, 10547 -1, NULL, 0); 10548 if (IS_ERR(tpacpi_sensors_pdev)) { 10549 ret = PTR_ERR(tpacpi_sensors_pdev); 10550 tpacpi_sensors_pdev = NULL; 10551 pr_err("unable to register hwmon platform device\n"); 10552 thinkpad_acpi_module_exit(); 10553 return ret; 10554 } 10555 tp_features.sensors_pdev_attrs_registered = 1; 10556 tpacpi_hwmon = hwmon_device_register_with_groups( 10557 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL); 10558 10559 if (IS_ERR(tpacpi_hwmon)) { 10560 ret = PTR_ERR(tpacpi_hwmon); 10561 tpacpi_hwmon = NULL; 10562 pr_err("unable to register hwmon device\n"); 10563 thinkpad_acpi_module_exit(); 10564 return ret; 10565 } 10566 mutex_init(&tpacpi_inputdev_send_mutex); 10567 tpacpi_inputdev = input_allocate_device(); 10568 if (!tpacpi_inputdev) { 10569 thinkpad_acpi_module_exit(); 10570 return -ENOMEM; 10571 } else { 10572 /* Prepare input device, but don't register */ 10573 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 10574 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 10575 tpacpi_inputdev->id.bustype = BUS_HOST; 10576 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 10577 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 10578 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 10579 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 10580 } 10581 10582 /* Init subdriver dependencies */ 10583 tpacpi_detect_brightness_capabilities(); 10584 10585 /* Init subdrivers */ 10586 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10587 ret = ibm_init(&ibms_init[i]); 10588 if (ret >= 0 && *ibms_init[i].param) 10589 ret = ibms_init[i].data->write(ibms_init[i].param); 10590 if (ret < 0) { 10591 thinkpad_acpi_module_exit(); 10592 return ret; 10593 } 10594 } 10595 10596 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 10597 10598 ret = input_register_device(tpacpi_inputdev); 10599 if (ret < 0) { 10600 pr_err("unable to register input device\n"); 10601 thinkpad_acpi_module_exit(); 10602 return ret; 10603 } else { 10604 tp_features.input_device_registered = 1; 10605 } 10606 10607 return 0; 10608 } 10609 10610 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 10611 10612 /* 10613 * This will autoload the driver in almost every ThinkPad 10614 * in widespread use. 10615 * 10616 * Only _VERY_ old models, like the 240, 240x and 570 lack 10617 * the HKEY event interface. 10618 */ 10619 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 10620 10621 /* 10622 * DMI matching for module autoloading 10623 * 10624 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10625 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 10626 * 10627 * Only models listed in thinkwiki will be supported, so add yours 10628 * if it is not there yet. 10629 */ 10630 #define IBM_BIOS_MODULE_ALIAS(__type) \ 10631 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 10632 10633 /* Ancient thinkpad BIOSes have to be identified by 10634 * BIOS type or model number, and there are far less 10635 * BIOS types than model numbers... */ 10636 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 10637 10638 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 10639 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 10640 MODULE_DESCRIPTION(TPACPI_DESC); 10641 MODULE_VERSION(TPACPI_VERSION); 10642 MODULE_LICENSE("GPL"); 10643 10644 module_init(thinkpad_acpi_module_init); 10645 module_exit(thinkpad_acpi_module_exit); 10646