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 beep_needs_two_args:1; 322 u32 mixer_no_level_control:1; 323 u32 battery_force_primary:1; 324 u32 input_device_registered:1; 325 u32 platform_drv_registered:1; 326 u32 platform_drv_attrs_registered:1; 327 u32 sensors_pdrv_registered:1; 328 u32 sensors_pdrv_attrs_registered:1; 329 u32 sensors_pdev_attrs_registered:1; 330 u32 hotkey_poll_active:1; 331 u32 has_adaptive_kbd:1; 332 } tp_features; 333 334 static struct { 335 u16 hotkey_mask_ff:1; 336 u16 volume_ctrl_forbidden:1; 337 } tp_warned; 338 339 struct thinkpad_id_data { 340 unsigned int vendor; /* ThinkPad vendor: 341 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 342 343 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 344 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 345 346 u32 bios_model; /* 1Y = 0x3159, 0 = unknown */ 347 u32 ec_model; 348 u16 bios_release; /* 1ZETK1WW = 0x4b31, 0 = unknown */ 349 u16 ec_release; 350 351 char *model_str; /* ThinkPad T43 */ 352 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 353 }; 354 static struct thinkpad_id_data thinkpad_id; 355 356 static enum { 357 TPACPI_LIFE_INIT = 0, 358 TPACPI_LIFE_RUNNING, 359 TPACPI_LIFE_EXITING, 360 } tpacpi_lifecycle; 361 362 static int experimental; 363 static u32 dbg_level; 364 365 static struct workqueue_struct *tpacpi_wq; 366 367 enum led_status_t { 368 TPACPI_LED_OFF = 0, 369 TPACPI_LED_ON, 370 TPACPI_LED_BLINK, 371 }; 372 373 /* tpacpi LED class */ 374 struct tpacpi_led_classdev { 375 struct led_classdev led_classdev; 376 int led; 377 }; 378 379 /* brightness level capabilities */ 380 static unsigned int bright_maxlvl; /* 0 = unknown */ 381 382 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 383 static int dbg_wlswemul; 384 static bool tpacpi_wlsw_emulstate; 385 static int dbg_bluetoothemul; 386 static bool tpacpi_bluetooth_emulstate; 387 static int dbg_wwanemul; 388 static bool tpacpi_wwan_emulstate; 389 static int dbg_uwbemul; 390 static bool tpacpi_uwb_emulstate; 391 #endif 392 393 394 /************************************************************************* 395 * Debugging helpers 396 */ 397 398 #define dbg_printk(a_dbg_level, format, arg...) \ 399 do { \ 400 if (dbg_level & (a_dbg_level)) \ 401 printk(KERN_DEBUG pr_fmt("%s: " format), \ 402 __func__, ##arg); \ 403 } while (0) 404 405 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 406 #define vdbg_printk dbg_printk 407 static const char *str_supported(int is_supported); 408 #else 409 static inline const char *str_supported(int is_supported) { return ""; } 410 #define vdbg_printk(a_dbg_level, format, arg...) \ 411 do { if (0) no_printk(format, ##arg); } while (0) 412 #endif 413 414 static void tpacpi_log_usertask(const char * const what) 415 { 416 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 417 what, task_tgid_vnr(current)); 418 } 419 420 #define tpacpi_disclose_usertask(what, format, arg...) \ 421 do { \ 422 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 423 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 424 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 425 what, task_tgid_vnr(current), ## arg); \ 426 } \ 427 } while (0) 428 429 /* 430 * Quirk handling helpers 431 * 432 * ThinkPad IDs and versions seen in the field so far are 433 * two or three characters from the set [0-9A-Z], i.e. base 36. 434 * 435 * We use values well outside that range as specials. 436 */ 437 438 #define TPACPI_MATCH_ANY 0xffffffffU 439 #define TPACPI_MATCH_ANY_VERSION 0xffffU 440 #define TPACPI_MATCH_UNKNOWN 0U 441 442 /* TPID('1', 'Y') == 0x3159 */ 443 #define TPID(__c1, __c2) (((__c1) << 8) | (__c2)) 444 #define TPID3(__c1, __c2, __c3) (((__c1) << 16) | ((__c2) << 8) | (__c3)) 445 #define TPVER TPID 446 447 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 448 { .vendor = PCI_VENDOR_ID_IBM, \ 449 .bios = TPID(__id1, __id2), \ 450 .ec = TPACPI_MATCH_ANY, \ 451 .quirks = (__quirk) } 452 453 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 454 { .vendor = PCI_VENDOR_ID_LENOVO, \ 455 .bios = TPID(__id1, __id2), \ 456 .ec = TPACPI_MATCH_ANY, \ 457 .quirks = (__quirk) } 458 459 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \ 460 { .vendor = PCI_VENDOR_ID_LENOVO, \ 461 .bios = TPID3(__id1, __id2, __id3), \ 462 .ec = TPACPI_MATCH_ANY, \ 463 .quirks = (__quirk) } 464 465 #define TPACPI_QEC_IBM(__id1, __id2, __quirk) \ 466 { .vendor = PCI_VENDOR_ID_IBM, \ 467 .bios = TPACPI_MATCH_ANY, \ 468 .ec = TPID(__id1, __id2), \ 469 .quirks = (__quirk) } 470 471 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 472 { .vendor = PCI_VENDOR_ID_LENOVO, \ 473 .bios = TPACPI_MATCH_ANY, \ 474 .ec = TPID(__id1, __id2), \ 475 .quirks = (__quirk) } 476 477 struct tpacpi_quirk { 478 unsigned int vendor; 479 u32 bios; 480 u32 ec; 481 unsigned long quirks; 482 }; 483 484 /** 485 * tpacpi_check_quirks() - search BIOS/EC version on a list 486 * @qlist: array of &struct tpacpi_quirk 487 * @qlist_size: number of elements in @qlist 488 * 489 * Iterates over a quirks list until one is found that matches the 490 * ThinkPad's vendor, BIOS and EC model. 491 * 492 * Returns 0 if nothing matches, otherwise returns the quirks field of 493 * the matching &struct tpacpi_quirk entry. 494 * 495 * The match criteria is: vendor, ec and bios much match. 496 */ 497 static unsigned long __init tpacpi_check_quirks( 498 const struct tpacpi_quirk *qlist, 499 unsigned int qlist_size) 500 { 501 while (qlist_size) { 502 if ((qlist->vendor == thinkpad_id.vendor || 503 qlist->vendor == TPACPI_MATCH_ANY) && 504 (qlist->bios == thinkpad_id.bios_model || 505 qlist->bios == TPACPI_MATCH_ANY) && 506 (qlist->ec == thinkpad_id.ec_model || 507 qlist->ec == TPACPI_MATCH_ANY)) 508 return qlist->quirks; 509 510 qlist_size--; 511 qlist++; 512 } 513 return 0; 514 } 515 516 static inline bool __pure __init tpacpi_is_lenovo(void) 517 { 518 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 519 } 520 521 static inline bool __pure __init tpacpi_is_ibm(void) 522 { 523 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 524 } 525 526 /**************************************************************************** 527 **************************************************************************** 528 * 529 * ACPI Helpers and device model 530 * 531 **************************************************************************** 532 ****************************************************************************/ 533 534 /************************************************************************* 535 * ACPI basic handles 536 */ 537 538 static acpi_handle root_handle; 539 static acpi_handle ec_handle; 540 541 #define TPACPI_HANDLE(object, parent, paths...) \ 542 static acpi_handle object##_handle; \ 543 static const acpi_handle * const object##_parent __initconst = \ 544 &parent##_handle; \ 545 static char *object##_paths[] __initdata = { paths } 546 547 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 548 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 549 550 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 551 /* T4x, X31, X40 */ 552 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 553 "\\CMS", /* R40, R40e */ 554 ); /* all others */ 555 556 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 557 "^HKEY", /* R30, R31 */ 558 "HKEY", /* all others */ 559 ); /* 570 */ 560 561 /************************************************************************* 562 * ACPI helpers 563 */ 564 565 static int acpi_evalf(acpi_handle handle, 566 int *res, char *method, char *fmt, ...) 567 { 568 char *fmt0 = fmt; 569 struct acpi_object_list params; 570 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 571 struct acpi_buffer result, *resultp; 572 union acpi_object out_obj; 573 acpi_status status; 574 va_list ap; 575 char res_type; 576 int success; 577 int quiet; 578 579 if (!*fmt) { 580 pr_err("acpi_evalf() called with empty format\n"); 581 return 0; 582 } 583 584 if (*fmt == 'q') { 585 quiet = 1; 586 fmt++; 587 } else 588 quiet = 0; 589 590 res_type = *(fmt++); 591 592 params.count = 0; 593 params.pointer = &in_objs[0]; 594 595 va_start(ap, fmt); 596 while (*fmt) { 597 char c = *(fmt++); 598 switch (c) { 599 case 'd': /* int */ 600 in_objs[params.count].integer.value = va_arg(ap, int); 601 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 602 break; 603 /* add more types as needed */ 604 default: 605 pr_err("acpi_evalf() called with invalid format character '%c'\n", 606 c); 607 va_end(ap); 608 return 0; 609 } 610 } 611 va_end(ap); 612 613 if (res_type != 'v') { 614 result.length = sizeof(out_obj); 615 result.pointer = &out_obj; 616 resultp = &result; 617 } else 618 resultp = NULL; 619 620 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 621 622 switch (res_type) { 623 case 'd': /* int */ 624 success = (status == AE_OK && 625 out_obj.type == ACPI_TYPE_INTEGER); 626 if (success && res) 627 *res = out_obj.integer.value; 628 break; 629 case 'v': /* void */ 630 success = status == AE_OK; 631 break; 632 /* add more types as needed */ 633 default: 634 pr_err("acpi_evalf() called with invalid format character '%c'\n", 635 res_type); 636 return 0; 637 } 638 639 if (!success && !quiet) 640 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 641 method, fmt0, acpi_format_exception(status)); 642 643 return success; 644 } 645 646 static int acpi_ec_read(int i, u8 *p) 647 { 648 int v; 649 650 if (ecrd_handle) { 651 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 652 return 0; 653 *p = v; 654 } else { 655 if (ec_read(i, p) < 0) 656 return 0; 657 } 658 659 return 1; 660 } 661 662 static int acpi_ec_write(int i, u8 v) 663 { 664 if (ecwr_handle) { 665 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 666 return 0; 667 } else { 668 if (ec_write(i, v) < 0) 669 return 0; 670 } 671 672 return 1; 673 } 674 675 static int issue_thinkpad_cmos_command(int cmos_cmd) 676 { 677 if (!cmos_handle) 678 return -ENXIO; 679 680 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 681 return -EIO; 682 683 return 0; 684 } 685 686 /************************************************************************* 687 * ACPI device model 688 */ 689 690 #define TPACPI_ACPIHANDLE_INIT(object) \ 691 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 692 object##_paths, ARRAY_SIZE(object##_paths)) 693 694 static void __init drv_acpi_handle_init(const char *name, 695 acpi_handle *handle, const acpi_handle parent, 696 char **paths, const int num_paths) 697 { 698 int i; 699 acpi_status status; 700 701 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 702 name); 703 704 for (i = 0; i < num_paths; i++) { 705 status = acpi_get_handle(parent, paths[i], handle); 706 if (ACPI_SUCCESS(status)) { 707 dbg_printk(TPACPI_DBG_INIT, 708 "Found ACPI handle %s for %s\n", 709 paths[i], name); 710 return; 711 } 712 } 713 714 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 715 name); 716 *handle = NULL; 717 } 718 719 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 720 u32 level, void *context, void **return_value) 721 { 722 struct acpi_device *dev; 723 if (!strcmp(context, "video")) { 724 if (acpi_bus_get_device(handle, &dev)) 725 return AE_OK; 726 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 727 return AE_OK; 728 } 729 730 *(acpi_handle *)return_value = handle; 731 732 return AE_CTRL_TERMINATE; 733 } 734 735 static void __init tpacpi_acpi_handle_locate(const char *name, 736 const char *hid, 737 acpi_handle *handle) 738 { 739 acpi_status status; 740 acpi_handle device_found; 741 742 BUG_ON(!name || !handle); 743 vdbg_printk(TPACPI_DBG_INIT, 744 "trying to locate ACPI handle for %s, using HID %s\n", 745 name, hid ? hid : "NULL"); 746 747 memset(&device_found, 0, sizeof(device_found)); 748 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 749 (void *)name, &device_found); 750 751 *handle = NULL; 752 753 if (ACPI_SUCCESS(status)) { 754 *handle = device_found; 755 dbg_printk(TPACPI_DBG_INIT, 756 "Found ACPI handle for %s\n", name); 757 } else { 758 vdbg_printk(TPACPI_DBG_INIT, 759 "Could not locate an ACPI handle for %s: %s\n", 760 name, acpi_format_exception(status)); 761 } 762 } 763 764 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 765 { 766 struct ibm_struct *ibm = data; 767 768 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 769 return; 770 771 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 772 return; 773 774 ibm->acpi->notify(ibm, event); 775 } 776 777 static int __init setup_acpi_notify(struct ibm_struct *ibm) 778 { 779 acpi_status status; 780 int rc; 781 782 BUG_ON(!ibm->acpi); 783 784 if (!*ibm->acpi->handle) 785 return 0; 786 787 vdbg_printk(TPACPI_DBG_INIT, 788 "setting up ACPI notify for %s\n", ibm->name); 789 790 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 791 if (rc < 0) { 792 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 793 return -ENODEV; 794 } 795 796 ibm->acpi->device->driver_data = ibm; 797 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 798 TPACPI_ACPI_EVENT_PREFIX, 799 ibm->name); 800 801 status = acpi_install_notify_handler(*ibm->acpi->handle, 802 ibm->acpi->type, dispatch_acpi_notify, ibm); 803 if (ACPI_FAILURE(status)) { 804 if (status == AE_ALREADY_EXISTS) { 805 pr_notice("another device driver is already handling %s events\n", 806 ibm->name); 807 } else { 808 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 809 ibm->name, acpi_format_exception(status)); 810 } 811 return -ENODEV; 812 } 813 ibm->flags.acpi_notify_installed = 1; 814 return 0; 815 } 816 817 static int __init tpacpi_device_add(struct acpi_device *device) 818 { 819 return 0; 820 } 821 822 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 823 { 824 int rc; 825 826 dbg_printk(TPACPI_DBG_INIT, 827 "registering %s as an ACPI driver\n", ibm->name); 828 829 BUG_ON(!ibm->acpi); 830 831 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 832 if (!ibm->acpi->driver) { 833 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 834 return -ENOMEM; 835 } 836 837 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 838 ibm->acpi->driver->ids = ibm->acpi->hid; 839 840 ibm->acpi->driver->ops.add = &tpacpi_device_add; 841 842 rc = acpi_bus_register_driver(ibm->acpi->driver); 843 if (rc < 0) { 844 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 845 ibm->name, rc); 846 kfree(ibm->acpi->driver); 847 ibm->acpi->driver = NULL; 848 } else if (!rc) 849 ibm->flags.acpi_driver_registered = 1; 850 851 return rc; 852 } 853 854 855 /**************************************************************************** 856 **************************************************************************** 857 * 858 * Procfs Helpers 859 * 860 **************************************************************************** 861 ****************************************************************************/ 862 863 static int dispatch_proc_show(struct seq_file *m, void *v) 864 { 865 struct ibm_struct *ibm = m->private; 866 867 if (!ibm || !ibm->read) 868 return -EINVAL; 869 return ibm->read(m); 870 } 871 872 static int dispatch_proc_open(struct inode *inode, struct file *file) 873 { 874 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 875 } 876 877 static ssize_t dispatch_proc_write(struct file *file, 878 const char __user *userbuf, 879 size_t count, loff_t *pos) 880 { 881 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 882 char *kernbuf; 883 int ret; 884 885 if (!ibm || !ibm->write) 886 return -EINVAL; 887 if (count > PAGE_SIZE - 2) 888 return -EINVAL; 889 890 kernbuf = kmalloc(count + 2, GFP_KERNEL); 891 if (!kernbuf) 892 return -ENOMEM; 893 894 if (copy_from_user(kernbuf, userbuf, count)) { 895 kfree(kernbuf); 896 return -EFAULT; 897 } 898 899 kernbuf[count] = 0; 900 strcat(kernbuf, ","); 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 file_operations dispatch_proc_fops = { 911 .owner = THIS_MODULE, 912 .open = dispatch_proc_open, 913 .read = seq_read, 914 .llseek = seq_lseek, 915 .release = single_release, 916 .write = dispatch_proc_write, 917 }; 918 919 static char *next_cmd(char **cmds) 920 { 921 char *start = *cmds; 922 char *end; 923 924 while ((end = strchr(start, ',')) && end == start) 925 start = end + 1; 926 927 if (!end) 928 return NULL; 929 930 *end = 0; 931 *cmds = end + 1; 932 return start; 933 } 934 935 936 /**************************************************************************** 937 **************************************************************************** 938 * 939 * Device model: input, hwmon and platform 940 * 941 **************************************************************************** 942 ****************************************************************************/ 943 944 static struct platform_device *tpacpi_pdev; 945 static struct platform_device *tpacpi_sensors_pdev; 946 static struct device *tpacpi_hwmon; 947 static struct input_dev *tpacpi_inputdev; 948 static struct mutex tpacpi_inputdev_send_mutex; 949 static LIST_HEAD(tpacpi_all_drivers); 950 951 #ifdef CONFIG_PM_SLEEP 952 static int tpacpi_suspend_handler(struct device *dev) 953 { 954 struct ibm_struct *ibm, *itmp; 955 956 list_for_each_entry_safe(ibm, itmp, 957 &tpacpi_all_drivers, 958 all_drivers) { 959 if (ibm->suspend) 960 (ibm->suspend)(); 961 } 962 963 return 0; 964 } 965 966 static int tpacpi_resume_handler(struct device *dev) 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->resume) 974 (ibm->resume)(); 975 } 976 977 return 0; 978 } 979 #endif 980 981 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 982 tpacpi_suspend_handler, tpacpi_resume_handler); 983 984 static void tpacpi_shutdown_handler(struct platform_device *pdev) 985 { 986 struct ibm_struct *ibm, *itmp; 987 988 list_for_each_entry_safe(ibm, itmp, 989 &tpacpi_all_drivers, 990 all_drivers) { 991 if (ibm->shutdown) 992 (ibm->shutdown)(); 993 } 994 } 995 996 static struct platform_driver tpacpi_pdriver = { 997 .driver = { 998 .name = TPACPI_DRVR_NAME, 999 .pm = &tpacpi_pm, 1000 }, 1001 .shutdown = tpacpi_shutdown_handler, 1002 }; 1003 1004 static struct platform_driver tpacpi_hwmon_pdriver = { 1005 .driver = { 1006 .name = TPACPI_HWMON_DRVR_NAME, 1007 }, 1008 }; 1009 1010 /************************************************************************* 1011 * sysfs support helpers 1012 */ 1013 1014 struct attribute_set { 1015 unsigned int members, max_members; 1016 struct attribute_group group; 1017 }; 1018 1019 struct attribute_set_obj { 1020 struct attribute_set s; 1021 struct attribute *a; 1022 } __attribute__((packed)); 1023 1024 static struct attribute_set *create_attr_set(unsigned int max_members, 1025 const char *name) 1026 { 1027 struct attribute_set_obj *sobj; 1028 1029 if (max_members == 0) 1030 return NULL; 1031 1032 /* Allocates space for implicit NULL at the end too */ 1033 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1034 max_members * sizeof(struct attribute *), 1035 GFP_KERNEL); 1036 if (!sobj) 1037 return NULL; 1038 sobj->s.max_members = max_members; 1039 sobj->s.group.attrs = &sobj->a; 1040 sobj->s.group.name = name; 1041 1042 return &sobj->s; 1043 } 1044 1045 #define destroy_attr_set(_set) \ 1046 kfree(_set); 1047 1048 /* not multi-threaded safe, use it in a single thread per set */ 1049 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1050 { 1051 if (!s || !attr) 1052 return -EINVAL; 1053 1054 if (s->members >= s->max_members) 1055 return -ENOMEM; 1056 1057 s->group.attrs[s->members] = attr; 1058 s->members++; 1059 1060 return 0; 1061 } 1062 1063 static int add_many_to_attr_set(struct attribute_set *s, 1064 struct attribute **attr, 1065 unsigned int count) 1066 { 1067 int i, res; 1068 1069 for (i = 0; i < count; i++) { 1070 res = add_to_attr_set(s, attr[i]); 1071 if (res) 1072 return res; 1073 } 1074 1075 return 0; 1076 } 1077 1078 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1079 { 1080 sysfs_remove_group(kobj, &s->group); 1081 destroy_attr_set(s); 1082 } 1083 1084 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1085 sysfs_create_group(_kobj, &_attr_set->group) 1086 1087 static int parse_strtoul(const char *buf, 1088 unsigned long max, unsigned long *value) 1089 { 1090 char *endp; 1091 1092 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1093 endp = skip_spaces(endp); 1094 if (*endp || *value > max) 1095 return -EINVAL; 1096 1097 return 0; 1098 } 1099 1100 static void tpacpi_disable_brightness_delay(void) 1101 { 1102 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1103 pr_notice("ACPI backlight control delay disabled\n"); 1104 } 1105 1106 static void printk_deprecated_attribute(const char * const what, 1107 const char * const details) 1108 { 1109 tpacpi_log_usertask("deprecated sysfs attribute"); 1110 pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n", 1111 what, details); 1112 } 1113 1114 /************************************************************************* 1115 * rfkill and radio control support helpers 1116 */ 1117 1118 /* 1119 * ThinkPad-ACPI firmware handling model: 1120 * 1121 * WLSW (master wireless switch) is event-driven, and is common to all 1122 * firmware-controlled radios. It cannot be controlled, just monitored, 1123 * as expected. It overrides all radio state in firmware 1124 * 1125 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1126 * (TODO: verify how WLSW interacts with the returned radio state). 1127 * 1128 * The only time there are shadow radio state changes, is when 1129 * masked-off hotkeys are used. 1130 */ 1131 1132 /* 1133 * Internal driver API for radio state: 1134 * 1135 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1136 * bool: true means radio blocked (off) 1137 */ 1138 enum tpacpi_rfkill_state { 1139 TPACPI_RFK_RADIO_OFF = 0, 1140 TPACPI_RFK_RADIO_ON 1141 }; 1142 1143 /* rfkill switches */ 1144 enum tpacpi_rfk_id { 1145 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1146 TPACPI_RFK_WWAN_SW_ID, 1147 TPACPI_RFK_UWB_SW_ID, 1148 TPACPI_RFK_SW_MAX 1149 }; 1150 1151 static const char *tpacpi_rfkill_names[] = { 1152 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1153 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1154 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1155 [TPACPI_RFK_SW_MAX] = NULL 1156 }; 1157 1158 /* ThinkPad-ACPI rfkill subdriver */ 1159 struct tpacpi_rfk { 1160 struct rfkill *rfkill; 1161 enum tpacpi_rfk_id id; 1162 const struct tpacpi_rfk_ops *ops; 1163 }; 1164 1165 struct tpacpi_rfk_ops { 1166 /* firmware interface */ 1167 int (*get_status)(void); 1168 int (*set_status)(const enum tpacpi_rfkill_state); 1169 }; 1170 1171 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1172 1173 /* Query FW and update rfkill sw state for a given rfkill switch */ 1174 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1175 { 1176 int status; 1177 1178 if (!tp_rfk) 1179 return -ENODEV; 1180 1181 status = (tp_rfk->ops->get_status)(); 1182 if (status < 0) 1183 return status; 1184 1185 rfkill_set_sw_state(tp_rfk->rfkill, 1186 (status == TPACPI_RFK_RADIO_OFF)); 1187 1188 return status; 1189 } 1190 1191 /* Query FW and update rfkill sw state for all rfkill switches */ 1192 static void tpacpi_rfk_update_swstate_all(void) 1193 { 1194 unsigned int i; 1195 1196 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1197 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1198 } 1199 1200 /* 1201 * Sync the HW-blocking state of all rfkill switches, 1202 * do notice it causes the rfkill core to schedule uevents 1203 */ 1204 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1205 { 1206 unsigned int i; 1207 struct tpacpi_rfk *tp_rfk; 1208 1209 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1210 tp_rfk = tpacpi_rfkill_switches[i]; 1211 if (tp_rfk) { 1212 if (rfkill_set_hw_state(tp_rfk->rfkill, 1213 blocked)) { 1214 /* ignore -- we track sw block */ 1215 } 1216 } 1217 } 1218 } 1219 1220 /* Call to get the WLSW state from the firmware */ 1221 static int hotkey_get_wlsw(void); 1222 1223 /* Call to query WLSW state and update all rfkill switches */ 1224 static bool tpacpi_rfk_check_hwblock_state(void) 1225 { 1226 int res = hotkey_get_wlsw(); 1227 int hw_blocked; 1228 1229 /* When unknown or unsupported, we have to assume it is unblocked */ 1230 if (res < 0) 1231 return false; 1232 1233 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1234 tpacpi_rfk_update_hwblock_state(hw_blocked); 1235 1236 return hw_blocked; 1237 } 1238 1239 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1240 { 1241 struct tpacpi_rfk *tp_rfk = data; 1242 int res; 1243 1244 dbg_printk(TPACPI_DBG_RFKILL, 1245 "request to change radio state to %s\n", 1246 blocked ? "blocked" : "unblocked"); 1247 1248 /* try to set radio state */ 1249 res = (tp_rfk->ops->set_status)(blocked ? 1250 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1251 1252 /* and update the rfkill core with whatever the FW really did */ 1253 tpacpi_rfk_update_swstate(tp_rfk); 1254 1255 return (res < 0) ? res : 0; 1256 } 1257 1258 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1259 .set_block = tpacpi_rfk_hook_set_block, 1260 }; 1261 1262 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1263 const struct tpacpi_rfk_ops *tp_rfkops, 1264 const enum rfkill_type rfktype, 1265 const char *name, 1266 const bool set_default) 1267 { 1268 struct tpacpi_rfk *atp_rfk; 1269 int res; 1270 bool sw_state = false; 1271 bool hw_state; 1272 int sw_status; 1273 1274 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1275 1276 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1277 if (atp_rfk) 1278 atp_rfk->rfkill = rfkill_alloc(name, 1279 &tpacpi_pdev->dev, 1280 rfktype, 1281 &tpacpi_rfk_rfkill_ops, 1282 atp_rfk); 1283 if (!atp_rfk || !atp_rfk->rfkill) { 1284 pr_err("failed to allocate memory for rfkill class\n"); 1285 kfree(atp_rfk); 1286 return -ENOMEM; 1287 } 1288 1289 atp_rfk->id = id; 1290 atp_rfk->ops = tp_rfkops; 1291 1292 sw_status = (tp_rfkops->get_status)(); 1293 if (sw_status < 0) { 1294 pr_err("failed to read initial state for %s, error %d\n", 1295 name, sw_status); 1296 } else { 1297 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1298 if (set_default) { 1299 /* try to keep the initial state, since we ask the 1300 * firmware to preserve it across S5 in NVRAM */ 1301 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1302 } 1303 } 1304 hw_state = tpacpi_rfk_check_hwblock_state(); 1305 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1306 1307 res = rfkill_register(atp_rfk->rfkill); 1308 if (res < 0) { 1309 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1310 rfkill_destroy(atp_rfk->rfkill); 1311 kfree(atp_rfk); 1312 return res; 1313 } 1314 1315 tpacpi_rfkill_switches[id] = atp_rfk; 1316 1317 pr_info("rfkill switch %s: radio is %sblocked\n", 1318 name, (sw_state || hw_state) ? "" : "un"); 1319 return 0; 1320 } 1321 1322 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1323 { 1324 struct tpacpi_rfk *tp_rfk; 1325 1326 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1327 1328 tp_rfk = tpacpi_rfkill_switches[id]; 1329 if (tp_rfk) { 1330 rfkill_unregister(tp_rfk->rfkill); 1331 rfkill_destroy(tp_rfk->rfkill); 1332 tpacpi_rfkill_switches[id] = NULL; 1333 kfree(tp_rfk); 1334 } 1335 } 1336 1337 static void printk_deprecated_rfkill_attribute(const char * const what) 1338 { 1339 printk_deprecated_attribute(what, 1340 "Please switch to generic rfkill before year 2010"); 1341 } 1342 1343 /* sysfs <radio> enable ------------------------------------------------ */ 1344 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1345 struct device_attribute *attr, 1346 char *buf) 1347 { 1348 int status; 1349 1350 printk_deprecated_rfkill_attribute(attr->attr.name); 1351 1352 /* This is in the ABI... */ 1353 if (tpacpi_rfk_check_hwblock_state()) { 1354 status = TPACPI_RFK_RADIO_OFF; 1355 } else { 1356 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1357 if (status < 0) 1358 return status; 1359 } 1360 1361 return snprintf(buf, PAGE_SIZE, "%d\n", 1362 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1363 } 1364 1365 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1366 struct device_attribute *attr, 1367 const char *buf, size_t count) 1368 { 1369 unsigned long t; 1370 int res; 1371 1372 printk_deprecated_rfkill_attribute(attr->attr.name); 1373 1374 if (parse_strtoul(buf, 1, &t)) 1375 return -EINVAL; 1376 1377 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1378 1379 /* This is in the ABI... */ 1380 if (tpacpi_rfk_check_hwblock_state() && !!t) 1381 return -EPERM; 1382 1383 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1384 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1385 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1386 1387 return (res < 0) ? res : count; 1388 } 1389 1390 /* procfs -------------------------------------------------------------- */ 1391 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1392 { 1393 if (id >= TPACPI_RFK_SW_MAX) 1394 seq_printf(m, "status:\t\tnot supported\n"); 1395 else { 1396 int status; 1397 1398 /* This is in the ABI... */ 1399 if (tpacpi_rfk_check_hwblock_state()) { 1400 status = TPACPI_RFK_RADIO_OFF; 1401 } else { 1402 status = tpacpi_rfk_update_swstate( 1403 tpacpi_rfkill_switches[id]); 1404 if (status < 0) 1405 return status; 1406 } 1407 1408 seq_printf(m, "status:\t\t%s\n", 1409 (status == TPACPI_RFK_RADIO_ON) ? 1410 "enabled" : "disabled"); 1411 seq_printf(m, "commands:\tenable, disable\n"); 1412 } 1413 1414 return 0; 1415 } 1416 1417 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1418 { 1419 char *cmd; 1420 int status = -1; 1421 int res = 0; 1422 1423 if (id >= TPACPI_RFK_SW_MAX) 1424 return -ENODEV; 1425 1426 while ((cmd = next_cmd(&buf))) { 1427 if (strlencmp(cmd, "enable") == 0) 1428 status = TPACPI_RFK_RADIO_ON; 1429 else if (strlencmp(cmd, "disable") == 0) 1430 status = TPACPI_RFK_RADIO_OFF; 1431 else 1432 return -EINVAL; 1433 } 1434 1435 if (status != -1) { 1436 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1437 (status == TPACPI_RFK_RADIO_ON) ? 1438 "enable" : "disable", 1439 tpacpi_rfkill_names[id]); 1440 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1441 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1442 } 1443 1444 return res; 1445 } 1446 1447 /************************************************************************* 1448 * thinkpad-acpi driver attributes 1449 */ 1450 1451 /* interface_version --------------------------------------------------- */ 1452 static ssize_t interface_version_show(struct device_driver *drv, char *buf) 1453 { 1454 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1455 } 1456 static DRIVER_ATTR_RO(interface_version); 1457 1458 /* debug_level --------------------------------------------------------- */ 1459 static ssize_t debug_level_show(struct device_driver *drv, char *buf) 1460 { 1461 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1462 } 1463 1464 static ssize_t debug_level_store(struct device_driver *drv, const char *buf, 1465 size_t count) 1466 { 1467 unsigned long t; 1468 1469 if (parse_strtoul(buf, 0xffff, &t)) 1470 return -EINVAL; 1471 1472 dbg_level = t; 1473 1474 return count; 1475 } 1476 static DRIVER_ATTR_RW(debug_level); 1477 1478 /* version ------------------------------------------------------------- */ 1479 static ssize_t version_show(struct device_driver *drv, char *buf) 1480 { 1481 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1482 TPACPI_DESC, TPACPI_VERSION); 1483 } 1484 static DRIVER_ATTR_RO(version); 1485 1486 /* --------------------------------------------------------------------- */ 1487 1488 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1489 1490 /* wlsw_emulstate ------------------------------------------------------ */ 1491 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf) 1492 { 1493 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1494 } 1495 1496 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf, 1497 size_t count) 1498 { 1499 unsigned long t; 1500 1501 if (parse_strtoul(buf, 1, &t)) 1502 return -EINVAL; 1503 1504 if (tpacpi_wlsw_emulstate != !!t) { 1505 tpacpi_wlsw_emulstate = !!t; 1506 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1507 } 1508 1509 return count; 1510 } 1511 static DRIVER_ATTR_RW(wlsw_emulstate); 1512 1513 /* bluetooth_emulstate ------------------------------------------------- */ 1514 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf) 1515 { 1516 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1517 } 1518 1519 static ssize_t bluetooth_emulstate_store(struct device_driver *drv, 1520 const char *buf, size_t count) 1521 { 1522 unsigned long t; 1523 1524 if (parse_strtoul(buf, 1, &t)) 1525 return -EINVAL; 1526 1527 tpacpi_bluetooth_emulstate = !!t; 1528 1529 return count; 1530 } 1531 static DRIVER_ATTR_RW(bluetooth_emulstate); 1532 1533 /* wwan_emulstate ------------------------------------------------- */ 1534 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf) 1535 { 1536 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1537 } 1538 1539 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf, 1540 size_t count) 1541 { 1542 unsigned long t; 1543 1544 if (parse_strtoul(buf, 1, &t)) 1545 return -EINVAL; 1546 1547 tpacpi_wwan_emulstate = !!t; 1548 1549 return count; 1550 } 1551 static DRIVER_ATTR_RW(wwan_emulstate); 1552 1553 /* uwb_emulstate ------------------------------------------------- */ 1554 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf) 1555 { 1556 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1557 } 1558 1559 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf, 1560 size_t count) 1561 { 1562 unsigned long t; 1563 1564 if (parse_strtoul(buf, 1, &t)) 1565 return -EINVAL; 1566 1567 tpacpi_uwb_emulstate = !!t; 1568 1569 return count; 1570 } 1571 static DRIVER_ATTR_RW(uwb_emulstate); 1572 #endif 1573 1574 /* --------------------------------------------------------------------- */ 1575 1576 static struct driver_attribute *tpacpi_driver_attributes[] = { 1577 &driver_attr_debug_level, &driver_attr_version, 1578 &driver_attr_interface_version, 1579 }; 1580 1581 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1582 { 1583 int i, res; 1584 1585 i = 0; 1586 res = 0; 1587 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1588 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1589 i++; 1590 } 1591 1592 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1593 if (!res && dbg_wlswemul) 1594 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1595 if (!res && dbg_bluetoothemul) 1596 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1597 if (!res && dbg_wwanemul) 1598 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1599 if (!res && dbg_uwbemul) 1600 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1601 #endif 1602 1603 return res; 1604 } 1605 1606 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1607 { 1608 int i; 1609 1610 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1611 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1612 1613 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1614 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1615 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1616 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1617 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1618 #endif 1619 } 1620 1621 /************************************************************************* 1622 * Firmware Data 1623 */ 1624 1625 /* 1626 * Table of recommended minimum BIOS versions 1627 * 1628 * Reasons for listing: 1629 * 1. Stable BIOS, listed because the unknown amount of 1630 * bugs and bad ACPI behaviour on older versions 1631 * 1632 * 2. BIOS or EC fw with known bugs that trigger on Linux 1633 * 1634 * 3. BIOS with known reduced functionality in older versions 1635 * 1636 * We recommend the latest BIOS and EC version. 1637 * We only support the latest BIOS and EC fw version as a rule. 1638 * 1639 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1640 * Information from users in ThinkWiki 1641 * 1642 * WARNING: we use this table also to detect that the machine is 1643 * a ThinkPad in some cases, so don't remove entries lightly. 1644 */ 1645 1646 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1647 { .vendor = (__v), \ 1648 .bios = TPID(__id1, __id2), \ 1649 .ec = TPACPI_MATCH_ANY, \ 1650 .quirks = TPACPI_MATCH_ANY_VERSION << 16 \ 1651 | TPVER(__bv1, __bv2) } 1652 1653 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1654 __eid, __ev1, __ev2) \ 1655 { .vendor = (__v), \ 1656 .bios = TPID(__bid1, __bid2), \ 1657 .ec = __eid, \ 1658 .quirks = TPVER(__ev1, __ev2) << 16 \ 1659 | TPVER(__bv1, __bv2) } 1660 1661 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1662 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1663 1664 /* Outdated IBM BIOSes often lack the EC id string */ 1665 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1666 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1667 __bv1, __bv2, TPID(__id1, __id2), \ 1668 __ev1, __ev2), \ 1669 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1670 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1671 __ev1, __ev2) 1672 1673 /* Outdated IBM BIOSes often lack the EC id string */ 1674 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1675 __eid1, __eid2, __ev1, __ev2) \ 1676 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1677 __bv1, __bv2, TPID(__eid1, __eid2), \ 1678 __ev1, __ev2), \ 1679 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1680 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1681 __ev1, __ev2) 1682 1683 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1684 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1685 1686 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1687 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1688 __bv1, __bv2, TPID(__id1, __id2), \ 1689 __ev1, __ev2) 1690 1691 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1692 __eid1, __eid2, __ev1, __ev2) \ 1693 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1694 __bv1, __bv2, TPID(__eid1, __eid2), \ 1695 __ev1, __ev2) 1696 1697 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1698 /* Numeric models ------------------ */ 1699 /* FW MODEL BIOS VERS */ 1700 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1701 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1702 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1703 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1704 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1705 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1706 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1707 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1708 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1709 1710 /* A-series ------------------------- */ 1711 /* FW MODEL BIOS VERS EC VERS */ 1712 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1713 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1714 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1715 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1716 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1717 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1718 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1719 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1720 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1721 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1722 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1723 1724 /* G-series ------------------------- */ 1725 /* FW MODEL BIOS VERS */ 1726 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1727 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1728 1729 /* R-series, T-series --------------- */ 1730 /* FW MODEL BIOS VERS EC VERS */ 1731 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1732 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1733 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1734 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1735 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1736 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1737 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1738 T40/p, T41/p, T42/p (1) */ 1739 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1740 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1741 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1742 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1743 1744 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1745 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1746 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1747 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1748 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1749 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1750 1751 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1752 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1753 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1754 1755 /* BIOS FW BIOS VERS EC FW EC VERS */ 1756 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1757 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1758 1759 /* X-series ------------------------- */ 1760 /* FW MODEL BIOS VERS EC VERS */ 1761 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1762 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1763 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1764 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1765 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1766 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1767 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1768 1769 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1770 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1771 1772 /* (0) - older versions lack DMI EC fw string and functionality */ 1773 /* (1) - older versions known to lack functionality */ 1774 }; 1775 1776 #undef TPV_QL1 1777 #undef TPV_QL0 1778 #undef TPV_QI2 1779 #undef TPV_QI1 1780 #undef TPV_QI0 1781 #undef TPV_Q_X 1782 #undef TPV_Q 1783 1784 static void __init tpacpi_check_outdated_fw(void) 1785 { 1786 unsigned long fwvers; 1787 u16 ec_version, bios_version; 1788 1789 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1790 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1791 1792 if (!fwvers) 1793 return; 1794 1795 bios_version = fwvers & 0xffffU; 1796 ec_version = (fwvers >> 16) & 0xffffU; 1797 1798 /* note that unknown versions are set to 0x0000 and we use that */ 1799 if ((bios_version > thinkpad_id.bios_release) || 1800 (ec_version > thinkpad_id.ec_release && 1801 ec_version != TPACPI_MATCH_ANY_VERSION)) { 1802 /* 1803 * The changelogs would let us track down the exact 1804 * reason, but it is just too much of a pain to track 1805 * it. We only list BIOSes that are either really 1806 * broken, or really stable to begin with, so it is 1807 * best if the user upgrades the firmware anyway. 1808 */ 1809 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1810 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n"); 1811 } 1812 } 1813 1814 static bool __init tpacpi_is_fw_known(void) 1815 { 1816 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1817 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1818 } 1819 1820 /**************************************************************************** 1821 **************************************************************************** 1822 * 1823 * Subdrivers 1824 * 1825 **************************************************************************** 1826 ****************************************************************************/ 1827 1828 /************************************************************************* 1829 * thinkpad-acpi metadata subdriver 1830 */ 1831 1832 static int thinkpad_acpi_driver_read(struct seq_file *m) 1833 { 1834 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1835 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1836 return 0; 1837 } 1838 1839 static struct ibm_struct thinkpad_acpi_driver_data = { 1840 .name = "driver", 1841 .read = thinkpad_acpi_driver_read, 1842 }; 1843 1844 /************************************************************************* 1845 * Hotkey subdriver 1846 */ 1847 1848 /* 1849 * ThinkPad firmware event model 1850 * 1851 * The ThinkPad firmware has two main event interfaces: normal ACPI 1852 * notifications (which follow the ACPI standard), and a private event 1853 * interface. 1854 * 1855 * The private event interface also issues events for the hotkeys. As 1856 * the driver gained features, the event handling code ended up being 1857 * built around the hotkey subdriver. This will need to be refactored 1858 * to a more formal event API eventually. 1859 * 1860 * Some "hotkeys" are actually supposed to be used as event reports, 1861 * such as "brightness has changed", "volume has changed", depending on 1862 * the ThinkPad model and how the firmware is operating. 1863 * 1864 * Unlike other classes, hotkey-class events have mask/unmask control on 1865 * non-ancient firmware. However, how it behaves changes a lot with the 1866 * firmware model and version. 1867 */ 1868 1869 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1870 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1871 TP_ACPI_HOTKEYSCAN_FNF2, 1872 TP_ACPI_HOTKEYSCAN_FNF3, 1873 TP_ACPI_HOTKEYSCAN_FNF4, 1874 TP_ACPI_HOTKEYSCAN_FNF5, 1875 TP_ACPI_HOTKEYSCAN_FNF6, 1876 TP_ACPI_HOTKEYSCAN_FNF7, 1877 TP_ACPI_HOTKEYSCAN_FNF8, 1878 TP_ACPI_HOTKEYSCAN_FNF9, 1879 TP_ACPI_HOTKEYSCAN_FNF10, 1880 TP_ACPI_HOTKEYSCAN_FNF11, 1881 TP_ACPI_HOTKEYSCAN_FNF12, 1882 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1883 TP_ACPI_HOTKEYSCAN_FNINSERT, 1884 TP_ACPI_HOTKEYSCAN_FNDELETE, 1885 TP_ACPI_HOTKEYSCAN_FNHOME, 1886 TP_ACPI_HOTKEYSCAN_FNEND, 1887 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1888 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1889 TP_ACPI_HOTKEYSCAN_FNSPACE, 1890 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1891 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1892 TP_ACPI_HOTKEYSCAN_MUTE, 1893 TP_ACPI_HOTKEYSCAN_THINKPAD, 1894 TP_ACPI_HOTKEYSCAN_UNK1, 1895 TP_ACPI_HOTKEYSCAN_UNK2, 1896 TP_ACPI_HOTKEYSCAN_UNK3, 1897 TP_ACPI_HOTKEYSCAN_UNK4, 1898 TP_ACPI_HOTKEYSCAN_UNK5, 1899 TP_ACPI_HOTKEYSCAN_UNK6, 1900 TP_ACPI_HOTKEYSCAN_UNK7, 1901 TP_ACPI_HOTKEYSCAN_UNK8, 1902 1903 /* Adaptive keyboard keycodes */ 1904 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1905 TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1906 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1907 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1908 TP_ACPI_HOTKEYSCAN_CLOUD, 1909 TP_ACPI_HOTKEYSCAN_UNK9, 1910 TP_ACPI_HOTKEYSCAN_VOICE, 1911 TP_ACPI_HOTKEYSCAN_UNK10, 1912 TP_ACPI_HOTKEYSCAN_GESTURES, 1913 TP_ACPI_HOTKEYSCAN_UNK11, 1914 TP_ACPI_HOTKEYSCAN_UNK12, 1915 TP_ACPI_HOTKEYSCAN_UNK13, 1916 TP_ACPI_HOTKEYSCAN_CONFIG, 1917 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1918 TP_ACPI_HOTKEYSCAN_RELOAD, 1919 TP_ACPI_HOTKEYSCAN_BACK, 1920 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1921 TP_ACPI_HOTKEYSCAN_MIC_UP, 1922 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1923 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1924 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1925 1926 /* Lenovo extended keymap, starting at 0x1300 */ 1927 TP_ACPI_HOTKEYSCAN_EXTENDED_START, 1928 /* first new observed key (star, favorites) is 0x1311 */ 1929 TP_ACPI_HOTKEYSCAN_STAR = 69, 1930 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2, 1931 TP_ACPI_HOTKEYSCAN_CALCULATOR, 1932 TP_ACPI_HOTKEYSCAN_BLUETOOTH, 1933 TP_ACPI_HOTKEYSCAN_KEYBOARD, 1934 1935 /* Hotkey keymap size */ 1936 TPACPI_HOTKEY_MAP_LEN 1937 }; 1938 1939 enum { /* Keys/events available through NVRAM polling */ 1940 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1941 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1942 }; 1943 1944 enum { /* Positions of some of the keys in hotkey masks */ 1945 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1946 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1947 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1948 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1949 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1950 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1951 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1952 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1953 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1954 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1955 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1956 }; 1957 1958 enum { /* NVRAM to ACPI HKEY group map */ 1959 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1960 TP_ACPI_HKEY_ZOOM_MASK | 1961 TP_ACPI_HKEY_DISPSWTCH_MASK | 1962 TP_ACPI_HKEY_HIBERNATE_MASK, 1963 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1964 TP_ACPI_HKEY_BRGHTDWN_MASK, 1965 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1966 TP_ACPI_HKEY_VOLDWN_MASK | 1967 TP_ACPI_HKEY_MUTE_MASK, 1968 }; 1969 1970 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1971 struct tp_nvram_state { 1972 u16 thinkpad_toggle:1; 1973 u16 zoom_toggle:1; 1974 u16 display_toggle:1; 1975 u16 thinklight_toggle:1; 1976 u16 hibernate_toggle:1; 1977 u16 displayexp_toggle:1; 1978 u16 display_state:1; 1979 u16 brightness_toggle:1; 1980 u16 volume_toggle:1; 1981 u16 mute:1; 1982 1983 u8 brightness_level; 1984 u8 volume_level; 1985 }; 1986 1987 /* kthread for the hotkey poller */ 1988 static struct task_struct *tpacpi_hotkey_task; 1989 1990 /* 1991 * Acquire mutex to write poller control variables as an 1992 * atomic block. 1993 * 1994 * Increment hotkey_config_change when changing them if you 1995 * want the kthread to forget old state. 1996 * 1997 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1998 */ 1999 static struct mutex hotkey_thread_data_mutex; 2000 static unsigned int hotkey_config_change; 2001 2002 /* 2003 * hotkey poller control variables 2004 * 2005 * Must be atomic or readers will also need to acquire mutex 2006 * 2007 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2008 * should be used only when the changes need to be taken as 2009 * a block, OR when one needs to force the kthread to forget 2010 * old state. 2011 */ 2012 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2013 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2014 2015 #define HOTKEY_CONFIG_CRITICAL_START \ 2016 do { \ 2017 mutex_lock(&hotkey_thread_data_mutex); \ 2018 hotkey_config_change++; \ 2019 } while (0); 2020 #define HOTKEY_CONFIG_CRITICAL_END \ 2021 mutex_unlock(&hotkey_thread_data_mutex); 2022 2023 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2024 2025 #define hotkey_source_mask 0U 2026 #define HOTKEY_CONFIG_CRITICAL_START 2027 #define HOTKEY_CONFIG_CRITICAL_END 2028 2029 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2030 2031 static struct mutex hotkey_mutex; 2032 2033 static enum { /* Reasons for waking up */ 2034 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2035 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2036 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2037 } hotkey_wakeup_reason; 2038 2039 static int hotkey_autosleep_ack; 2040 2041 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2042 static u32 hotkey_all_mask; /* all events supported in fw */ 2043 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */ 2044 static u32 hotkey_reserved_mask; /* events better left disabled */ 2045 static u32 hotkey_driver_mask; /* events needed by the driver */ 2046 static u32 hotkey_user_mask; /* events visible to userspace */ 2047 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2048 2049 static u16 *hotkey_keycode_map; 2050 2051 static struct attribute_set *hotkey_dev_attributes; 2052 2053 static void tpacpi_driver_event(const unsigned int hkey_event); 2054 static void hotkey_driver_event(const unsigned int scancode); 2055 static void hotkey_poll_setup(const bool may_warn); 2056 2057 /* HKEY.MHKG() return bits */ 2058 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2059 enum { 2060 TP_ACPI_MULTI_MODE_INVALID = 0, 2061 TP_ACPI_MULTI_MODE_UNKNOWN = 1 << 0, 2062 TP_ACPI_MULTI_MODE_LAPTOP = 1 << 1, 2063 TP_ACPI_MULTI_MODE_TABLET = 1 << 2, 2064 TP_ACPI_MULTI_MODE_FLAT = 1 << 3, 2065 TP_ACPI_MULTI_MODE_STAND = 1 << 4, 2066 TP_ACPI_MULTI_MODE_TENT = 1 << 5, 2067 TP_ACPI_MULTI_MODE_STAND_TENT = 1 << 6, 2068 }; 2069 2070 enum { 2071 /* The following modes are considered tablet mode for the purpose of 2072 * reporting the status to userspace. i.e. in all these modes it makes 2073 * sense to disable the laptop input devices such as touchpad and 2074 * keyboard. 2075 */ 2076 TP_ACPI_MULTI_MODE_TABLET_LIKE = TP_ACPI_MULTI_MODE_TABLET | 2077 TP_ACPI_MULTI_MODE_STAND | 2078 TP_ACPI_MULTI_MODE_TENT | 2079 TP_ACPI_MULTI_MODE_STAND_TENT, 2080 }; 2081 2082 static int hotkey_get_wlsw(void) 2083 { 2084 int status; 2085 2086 if (!tp_features.hotkey_wlsw) 2087 return -ENODEV; 2088 2089 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2090 if (dbg_wlswemul) 2091 return (tpacpi_wlsw_emulstate) ? 2092 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2093 #endif 2094 2095 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2096 return -EIO; 2097 2098 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2099 } 2100 2101 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode) 2102 { 2103 int type = (s >> 16) & 0xffff; 2104 int value = s & 0xffff; 2105 int mode = TP_ACPI_MULTI_MODE_INVALID; 2106 int valid_modes = 0; 2107 2108 if (has_tablet_mode) 2109 *has_tablet_mode = 0; 2110 2111 switch (type) { 2112 case 1: 2113 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2114 TP_ACPI_MULTI_MODE_TABLET | 2115 TP_ACPI_MULTI_MODE_STAND_TENT; 2116 break; 2117 case 2: 2118 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2119 TP_ACPI_MULTI_MODE_FLAT | 2120 TP_ACPI_MULTI_MODE_TABLET | 2121 TP_ACPI_MULTI_MODE_STAND | 2122 TP_ACPI_MULTI_MODE_TENT; 2123 break; 2124 case 3: 2125 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2126 TP_ACPI_MULTI_MODE_FLAT; 2127 break; 2128 case 4: 2129 case 5: 2130 /* In mode 4, FLAT is not specified as a valid mode. However, 2131 * it can be seen at least on the X1 Yoga 2nd Generation. 2132 */ 2133 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2134 TP_ACPI_MULTI_MODE_FLAT | 2135 TP_ACPI_MULTI_MODE_TABLET | 2136 TP_ACPI_MULTI_MODE_STAND | 2137 TP_ACPI_MULTI_MODE_TENT; 2138 break; 2139 default: 2140 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n", 2141 type, value, TPACPI_MAIL); 2142 return 0; 2143 } 2144 2145 if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE)) 2146 *has_tablet_mode = 1; 2147 2148 switch (value) { 2149 case 1: 2150 mode = TP_ACPI_MULTI_MODE_LAPTOP; 2151 break; 2152 case 2: 2153 mode = TP_ACPI_MULTI_MODE_FLAT; 2154 break; 2155 case 3: 2156 mode = TP_ACPI_MULTI_MODE_TABLET; 2157 break; 2158 case 4: 2159 if (type == 1) 2160 mode = TP_ACPI_MULTI_MODE_STAND_TENT; 2161 else 2162 mode = TP_ACPI_MULTI_MODE_STAND; 2163 break; 2164 case 5: 2165 mode = TP_ACPI_MULTI_MODE_TENT; 2166 break; 2167 default: 2168 if (type == 5 && value == 0xffff) { 2169 pr_warn("Multi mode status is undetected, assuming laptop\n"); 2170 return 0; 2171 } 2172 } 2173 2174 if (!(mode & valid_modes)) { 2175 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n", 2176 value, type, TPACPI_MAIL); 2177 return 0; 2178 } 2179 2180 return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE); 2181 } 2182 2183 static int hotkey_get_tablet_mode(int *status) 2184 { 2185 int s; 2186 2187 switch (tp_features.hotkey_tablet) { 2188 case TP_HOTKEY_TABLET_USES_MHKG: 2189 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2190 return -EIO; 2191 2192 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2193 break; 2194 case TP_HOTKEY_TABLET_USES_GMMS: 2195 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0)) 2196 return -EIO; 2197 2198 *status = hotkey_gmms_get_tablet_mode(s, NULL); 2199 break; 2200 default: 2201 break; 2202 } 2203 2204 return 0; 2205 } 2206 2207 /* 2208 * Reads current event mask from firmware, and updates 2209 * hotkey_acpi_mask accordingly. Also resets any bits 2210 * from hotkey_user_mask that are unavailable to be 2211 * delivered (shadow requirement of the userspace ABI). 2212 * 2213 * Call with hotkey_mutex held 2214 */ 2215 static int hotkey_mask_get(void) 2216 { 2217 if (tp_features.hotkey_mask) { 2218 u32 m = 0; 2219 2220 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2221 return -EIO; 2222 2223 hotkey_acpi_mask = m; 2224 } else { 2225 /* no mask support doesn't mean no event support... */ 2226 hotkey_acpi_mask = hotkey_all_mask; 2227 } 2228 2229 /* sync userspace-visible mask */ 2230 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2231 2232 return 0; 2233 } 2234 2235 static void hotkey_mask_warn_incomplete_mask(void) 2236 { 2237 /* log only what the user can fix... */ 2238 const u32 wantedmask = hotkey_driver_mask & 2239 ~(hotkey_acpi_mask | hotkey_source_mask) & 2240 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2241 2242 if (wantedmask) 2243 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2244 } 2245 2246 /* 2247 * Set the firmware mask when supported 2248 * 2249 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2250 * 2251 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2252 * 2253 * Call with hotkey_mutex held 2254 */ 2255 static int hotkey_mask_set(u32 mask) 2256 { 2257 int i; 2258 int rc = 0; 2259 2260 const u32 fwmask = mask & ~hotkey_source_mask; 2261 2262 if (tp_features.hotkey_mask) { 2263 for (i = 0; i < 32; i++) { 2264 if (!acpi_evalf(hkey_handle, 2265 NULL, "MHKM", "vdd", i + 1, 2266 !!(mask & (1 << i)))) { 2267 rc = -EIO; 2268 break; 2269 } 2270 } 2271 } 2272 2273 /* 2274 * We *must* make an inconditional call to hotkey_mask_get to 2275 * refresh hotkey_acpi_mask and update hotkey_user_mask 2276 * 2277 * Take the opportunity to also log when we cannot _enable_ 2278 * a given event. 2279 */ 2280 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2281 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n", 2282 fwmask, hotkey_acpi_mask); 2283 } 2284 2285 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2286 hotkey_mask_warn_incomplete_mask(); 2287 2288 return rc; 2289 } 2290 2291 /* 2292 * Sets hotkey_user_mask and tries to set the firmware mask 2293 * 2294 * Call with hotkey_mutex held 2295 */ 2296 static int hotkey_user_mask_set(const u32 mask) 2297 { 2298 int rc; 2299 2300 /* Give people a chance to notice they are doing something that 2301 * is bound to go boom on their users sooner or later */ 2302 if (!tp_warned.hotkey_mask_ff && 2303 (mask == 0xffff || mask == 0xffffff || 2304 mask == 0xffffffff)) { 2305 tp_warned.hotkey_mask_ff = 1; 2306 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n", 2307 mask); 2308 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n"); 2309 } 2310 2311 /* Try to enable what the user asked for, plus whatever we need. 2312 * this syncs everything but won't enable bits in hotkey_user_mask */ 2313 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2314 2315 /* Enable the available bits in hotkey_user_mask */ 2316 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2317 2318 return rc; 2319 } 2320 2321 /* 2322 * Sets the driver hotkey mask. 2323 * 2324 * Can be called even if the hotkey subdriver is inactive 2325 */ 2326 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2327 { 2328 int rc; 2329 2330 /* Do the right thing if hotkey_init has not been called yet */ 2331 if (!tp_features.hotkey) { 2332 hotkey_driver_mask = mask; 2333 return 0; 2334 } 2335 2336 mutex_lock(&hotkey_mutex); 2337 2338 HOTKEY_CONFIG_CRITICAL_START 2339 hotkey_driver_mask = mask; 2340 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2341 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2342 #endif 2343 HOTKEY_CONFIG_CRITICAL_END 2344 2345 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2346 ~hotkey_source_mask); 2347 hotkey_poll_setup(true); 2348 2349 mutex_unlock(&hotkey_mutex); 2350 2351 return rc; 2352 } 2353 2354 static int hotkey_status_get(int *status) 2355 { 2356 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2357 return -EIO; 2358 2359 return 0; 2360 } 2361 2362 static int hotkey_status_set(bool enable) 2363 { 2364 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2365 return -EIO; 2366 2367 return 0; 2368 } 2369 2370 static void tpacpi_input_send_tabletsw(void) 2371 { 2372 int state; 2373 2374 if (tp_features.hotkey_tablet && 2375 !hotkey_get_tablet_mode(&state)) { 2376 mutex_lock(&tpacpi_inputdev_send_mutex); 2377 2378 input_report_switch(tpacpi_inputdev, 2379 SW_TABLET_MODE, !!state); 2380 input_sync(tpacpi_inputdev); 2381 2382 mutex_unlock(&tpacpi_inputdev_send_mutex); 2383 } 2384 } 2385 2386 /* Do NOT call without validating scancode first */ 2387 static void tpacpi_input_send_key(const unsigned int scancode) 2388 { 2389 const unsigned int keycode = hotkey_keycode_map[scancode]; 2390 2391 if (keycode != KEY_RESERVED) { 2392 mutex_lock(&tpacpi_inputdev_send_mutex); 2393 2394 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2395 input_report_key(tpacpi_inputdev, keycode, 1); 2396 input_sync(tpacpi_inputdev); 2397 2398 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2399 input_report_key(tpacpi_inputdev, keycode, 0); 2400 input_sync(tpacpi_inputdev); 2401 2402 mutex_unlock(&tpacpi_inputdev_send_mutex); 2403 } 2404 } 2405 2406 /* Do NOT call without validating scancode first */ 2407 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2408 { 2409 hotkey_driver_event(scancode); 2410 if (hotkey_user_mask & (1 << scancode)) 2411 tpacpi_input_send_key(scancode); 2412 } 2413 2414 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2415 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2416 2417 /* Do NOT call without validating scancode first */ 2418 static void tpacpi_hotkey_send_key(unsigned int scancode) 2419 { 2420 tpacpi_input_send_key_masked(scancode); 2421 } 2422 2423 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2424 { 2425 u8 d; 2426 2427 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2428 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2429 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2430 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2431 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2432 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2433 } 2434 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) { 2435 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2436 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2437 } 2438 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2439 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2440 n->displayexp_toggle = 2441 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2442 } 2443 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2444 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2445 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2446 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2447 n->brightness_toggle = 2448 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2449 } 2450 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2451 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2452 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2453 >> TP_NVRAM_POS_LEVEL_VOLUME; 2454 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2455 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2456 } 2457 } 2458 2459 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2460 do { \ 2461 if ((event_mask & (1 << __scancode)) && \ 2462 oldn->__member != newn->__member) \ 2463 tpacpi_hotkey_send_key(__scancode); \ 2464 } while (0) 2465 2466 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2467 do { \ 2468 if (event_mask & (1 << __scancode)) \ 2469 tpacpi_hotkey_send_key(__scancode); \ 2470 } while (0) 2471 2472 static void issue_volchange(const unsigned int oldvol, 2473 const unsigned int newvol, 2474 const u32 event_mask) 2475 { 2476 unsigned int i = oldvol; 2477 2478 while (i > newvol) { 2479 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2480 i--; 2481 } 2482 while (i < newvol) { 2483 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2484 i++; 2485 } 2486 } 2487 2488 static void issue_brightnesschange(const unsigned int oldbrt, 2489 const unsigned int newbrt, 2490 const u32 event_mask) 2491 { 2492 unsigned int i = oldbrt; 2493 2494 while (i > newbrt) { 2495 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2496 i--; 2497 } 2498 while (i < newbrt) { 2499 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2500 i++; 2501 } 2502 } 2503 2504 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2505 struct tp_nvram_state *newn, 2506 const u32 event_mask) 2507 { 2508 2509 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2510 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2511 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2512 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2513 2514 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2515 2516 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2517 2518 /* 2519 * Handle volume 2520 * 2521 * This code is supposed to duplicate the IBM firmware behaviour: 2522 * - Pressing MUTE issues mute hotkey message, even when already mute 2523 * - Pressing Volume up/down issues volume up/down hotkey messages, 2524 * even when already at maximum or minimum volume 2525 * - The act of unmuting issues volume up/down notification, 2526 * depending which key was used to unmute 2527 * 2528 * We are constrained to what the NVRAM can tell us, which is not much 2529 * and certainly not enough if more than one volume hotkey was pressed 2530 * since the last poll cycle. 2531 * 2532 * Just to make our life interesting, some newer Lenovo ThinkPads have 2533 * bugs in the BIOS and may fail to update volume_toggle properly. 2534 */ 2535 if (newn->mute) { 2536 /* muted */ 2537 if (!oldn->mute || 2538 oldn->volume_toggle != newn->volume_toggle || 2539 oldn->volume_level != newn->volume_level) { 2540 /* recently muted, or repeated mute keypress, or 2541 * multiple presses ending in mute */ 2542 issue_volchange(oldn->volume_level, newn->volume_level, 2543 event_mask); 2544 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2545 } 2546 } else { 2547 /* unmute */ 2548 if (oldn->mute) { 2549 /* recently unmuted, issue 'unmute' keypress */ 2550 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2551 } 2552 if (oldn->volume_level != newn->volume_level) { 2553 issue_volchange(oldn->volume_level, newn->volume_level, 2554 event_mask); 2555 } else if (oldn->volume_toggle != newn->volume_toggle) { 2556 /* repeated vol up/down keypress at end of scale ? */ 2557 if (newn->volume_level == 0) 2558 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2559 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2560 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2561 } 2562 } 2563 2564 /* handle brightness */ 2565 if (oldn->brightness_level != newn->brightness_level) { 2566 issue_brightnesschange(oldn->brightness_level, 2567 newn->brightness_level, event_mask); 2568 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2569 /* repeated key presses that didn't change state */ 2570 if (newn->brightness_level == 0) 2571 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2572 else if (newn->brightness_level >= bright_maxlvl 2573 && !tp_features.bright_unkfw) 2574 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2575 } 2576 2577 #undef TPACPI_COMPARE_KEY 2578 #undef TPACPI_MAY_SEND_KEY 2579 } 2580 2581 /* 2582 * Polling driver 2583 * 2584 * We track all events in hotkey_source_mask all the time, since 2585 * most of them are edge-based. We only issue those requested by 2586 * hotkey_user_mask or hotkey_driver_mask, though. 2587 */ 2588 static int hotkey_kthread(void *data) 2589 { 2590 struct tp_nvram_state s[2]; 2591 u32 poll_mask, event_mask; 2592 unsigned int si, so; 2593 unsigned long t; 2594 unsigned int change_detector; 2595 unsigned int poll_freq; 2596 bool was_frozen; 2597 2598 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2599 goto exit; 2600 2601 set_freezable(); 2602 2603 so = 0; 2604 si = 1; 2605 t = 0; 2606 2607 /* Initial state for compares */ 2608 mutex_lock(&hotkey_thread_data_mutex); 2609 change_detector = hotkey_config_change; 2610 poll_mask = hotkey_source_mask; 2611 event_mask = hotkey_source_mask & 2612 (hotkey_driver_mask | hotkey_user_mask); 2613 poll_freq = hotkey_poll_freq; 2614 mutex_unlock(&hotkey_thread_data_mutex); 2615 hotkey_read_nvram(&s[so], poll_mask); 2616 2617 while (!kthread_should_stop()) { 2618 if (t == 0) { 2619 if (likely(poll_freq)) 2620 t = 1000/poll_freq; 2621 else 2622 t = 100; /* should never happen... */ 2623 } 2624 t = msleep_interruptible(t); 2625 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2626 break; 2627 2628 if (t > 0 && !was_frozen) 2629 continue; 2630 2631 mutex_lock(&hotkey_thread_data_mutex); 2632 if (was_frozen || hotkey_config_change != change_detector) { 2633 /* forget old state on thaw or config change */ 2634 si = so; 2635 t = 0; 2636 change_detector = hotkey_config_change; 2637 } 2638 poll_mask = hotkey_source_mask; 2639 event_mask = hotkey_source_mask & 2640 (hotkey_driver_mask | hotkey_user_mask); 2641 poll_freq = hotkey_poll_freq; 2642 mutex_unlock(&hotkey_thread_data_mutex); 2643 2644 if (likely(poll_mask)) { 2645 hotkey_read_nvram(&s[si], poll_mask); 2646 if (likely(si != so)) { 2647 hotkey_compare_and_issue_event(&s[so], &s[si], 2648 event_mask); 2649 } 2650 } 2651 2652 so = si; 2653 si ^= 1; 2654 } 2655 2656 exit: 2657 return 0; 2658 } 2659 2660 /* call with hotkey_mutex held */ 2661 static void hotkey_poll_stop_sync(void) 2662 { 2663 if (tpacpi_hotkey_task) { 2664 kthread_stop(tpacpi_hotkey_task); 2665 tpacpi_hotkey_task = NULL; 2666 } 2667 } 2668 2669 /* call with hotkey_mutex held */ 2670 static void hotkey_poll_setup(const bool may_warn) 2671 { 2672 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2673 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2674 2675 if (hotkey_poll_freq > 0 && 2676 (poll_driver_mask || 2677 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2678 if (!tpacpi_hotkey_task) { 2679 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2680 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2681 if (IS_ERR(tpacpi_hotkey_task)) { 2682 tpacpi_hotkey_task = NULL; 2683 pr_err("could not create kernel thread for hotkey polling\n"); 2684 } 2685 } 2686 } else { 2687 hotkey_poll_stop_sync(); 2688 if (may_warn && (poll_driver_mask || poll_user_mask) && 2689 hotkey_poll_freq == 0) { 2690 pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n", 2691 poll_user_mask, poll_driver_mask); 2692 } 2693 } 2694 } 2695 2696 static void hotkey_poll_setup_safe(const bool may_warn) 2697 { 2698 mutex_lock(&hotkey_mutex); 2699 hotkey_poll_setup(may_warn); 2700 mutex_unlock(&hotkey_mutex); 2701 } 2702 2703 /* call with hotkey_mutex held */ 2704 static void hotkey_poll_set_freq(unsigned int freq) 2705 { 2706 if (!freq) 2707 hotkey_poll_stop_sync(); 2708 2709 hotkey_poll_freq = freq; 2710 } 2711 2712 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2713 2714 static void hotkey_poll_setup(const bool __unused) 2715 { 2716 } 2717 2718 static void hotkey_poll_setup_safe(const bool __unused) 2719 { 2720 } 2721 2722 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2723 2724 static int hotkey_inputdev_open(struct input_dev *dev) 2725 { 2726 switch (tpacpi_lifecycle) { 2727 case TPACPI_LIFE_INIT: 2728 case TPACPI_LIFE_RUNNING: 2729 hotkey_poll_setup_safe(false); 2730 return 0; 2731 case TPACPI_LIFE_EXITING: 2732 return -EBUSY; 2733 } 2734 2735 /* Should only happen if tpacpi_lifecycle is corrupt */ 2736 BUG(); 2737 return -EBUSY; 2738 } 2739 2740 static void hotkey_inputdev_close(struct input_dev *dev) 2741 { 2742 /* disable hotkey polling when possible */ 2743 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2744 !(hotkey_source_mask & hotkey_driver_mask)) 2745 hotkey_poll_setup_safe(false); 2746 } 2747 2748 /* sysfs hotkey enable ------------------------------------------------- */ 2749 static ssize_t hotkey_enable_show(struct device *dev, 2750 struct device_attribute *attr, 2751 char *buf) 2752 { 2753 int res, status; 2754 2755 printk_deprecated_attribute("hotkey_enable", 2756 "Hotkey reporting is always enabled"); 2757 2758 res = hotkey_status_get(&status); 2759 if (res) 2760 return res; 2761 2762 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2763 } 2764 2765 static ssize_t hotkey_enable_store(struct device *dev, 2766 struct device_attribute *attr, 2767 const char *buf, size_t count) 2768 { 2769 unsigned long t; 2770 2771 printk_deprecated_attribute("hotkey_enable", 2772 "Hotkeys can be disabled through hotkey_mask"); 2773 2774 if (parse_strtoul(buf, 1, &t)) 2775 return -EINVAL; 2776 2777 if (t == 0) 2778 return -EPERM; 2779 2780 return count; 2781 } 2782 2783 static DEVICE_ATTR_RW(hotkey_enable); 2784 2785 /* sysfs hotkey mask --------------------------------------------------- */ 2786 static ssize_t hotkey_mask_show(struct device *dev, 2787 struct device_attribute *attr, 2788 char *buf) 2789 { 2790 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2791 } 2792 2793 static ssize_t hotkey_mask_store(struct device *dev, 2794 struct device_attribute *attr, 2795 const char *buf, size_t count) 2796 { 2797 unsigned long t; 2798 int res; 2799 2800 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2801 return -EINVAL; 2802 2803 if (mutex_lock_killable(&hotkey_mutex)) 2804 return -ERESTARTSYS; 2805 2806 res = hotkey_user_mask_set(t); 2807 2808 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2809 hotkey_poll_setup(true); 2810 #endif 2811 2812 mutex_unlock(&hotkey_mutex); 2813 2814 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2815 2816 return (res) ? res : count; 2817 } 2818 2819 static DEVICE_ATTR_RW(hotkey_mask); 2820 2821 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2822 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2823 struct device_attribute *attr, 2824 char *buf) 2825 { 2826 return sprintf(buf, "0\n"); 2827 } 2828 2829 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2830 2831 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2832 static ssize_t hotkey_bios_mask_show(struct device *dev, 2833 struct device_attribute *attr, 2834 char *buf) 2835 { 2836 printk_deprecated_attribute("hotkey_bios_mask", 2837 "This attribute is useless."); 2838 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2839 } 2840 2841 static DEVICE_ATTR_RO(hotkey_bios_mask); 2842 2843 /* sysfs hotkey all_mask ----------------------------------------------- */ 2844 static ssize_t hotkey_all_mask_show(struct device *dev, 2845 struct device_attribute *attr, 2846 char *buf) 2847 { 2848 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2849 hotkey_all_mask | hotkey_source_mask); 2850 } 2851 2852 static DEVICE_ATTR_RO(hotkey_all_mask); 2853 2854 /* sysfs hotkey all_mask ----------------------------------------------- */ 2855 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev, 2856 struct device_attribute *attr, 2857 char *buf) 2858 { 2859 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2860 hotkey_adaptive_all_mask | hotkey_source_mask); 2861 } 2862 2863 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask); 2864 2865 /* sysfs hotkey recommended_mask --------------------------------------- */ 2866 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2867 struct device_attribute *attr, 2868 char *buf) 2869 { 2870 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2871 (hotkey_all_mask | hotkey_source_mask) 2872 & ~hotkey_reserved_mask); 2873 } 2874 2875 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2876 2877 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2878 2879 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2880 static ssize_t hotkey_source_mask_show(struct device *dev, 2881 struct device_attribute *attr, 2882 char *buf) 2883 { 2884 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2885 } 2886 2887 static ssize_t hotkey_source_mask_store(struct device *dev, 2888 struct device_attribute *attr, 2889 const char *buf, size_t count) 2890 { 2891 unsigned long t; 2892 u32 r_ev; 2893 int rc; 2894 2895 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2896 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2897 return -EINVAL; 2898 2899 if (mutex_lock_killable(&hotkey_mutex)) 2900 return -ERESTARTSYS; 2901 2902 HOTKEY_CONFIG_CRITICAL_START 2903 hotkey_source_mask = t; 2904 HOTKEY_CONFIG_CRITICAL_END 2905 2906 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2907 ~hotkey_source_mask); 2908 hotkey_poll_setup(true); 2909 2910 /* check if events needed by the driver got disabled */ 2911 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2912 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2913 2914 mutex_unlock(&hotkey_mutex); 2915 2916 if (rc < 0) 2917 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n"); 2918 2919 if (r_ev) 2920 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n", 2921 r_ev); 2922 2923 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2924 2925 return (rc < 0) ? rc : count; 2926 } 2927 2928 static DEVICE_ATTR_RW(hotkey_source_mask); 2929 2930 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2931 static ssize_t hotkey_poll_freq_show(struct device *dev, 2932 struct device_attribute *attr, 2933 char *buf) 2934 { 2935 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2936 } 2937 2938 static ssize_t hotkey_poll_freq_store(struct device *dev, 2939 struct device_attribute *attr, 2940 const char *buf, size_t count) 2941 { 2942 unsigned long t; 2943 2944 if (parse_strtoul(buf, 25, &t)) 2945 return -EINVAL; 2946 2947 if (mutex_lock_killable(&hotkey_mutex)) 2948 return -ERESTARTSYS; 2949 2950 hotkey_poll_set_freq(t); 2951 hotkey_poll_setup(true); 2952 2953 mutex_unlock(&hotkey_mutex); 2954 2955 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2956 2957 return count; 2958 } 2959 2960 static DEVICE_ATTR_RW(hotkey_poll_freq); 2961 2962 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2963 2964 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2965 static ssize_t hotkey_radio_sw_show(struct device *dev, 2966 struct device_attribute *attr, 2967 char *buf) 2968 { 2969 int res; 2970 res = hotkey_get_wlsw(); 2971 if (res < 0) 2972 return res; 2973 2974 /* Opportunistic update */ 2975 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2976 2977 return snprintf(buf, PAGE_SIZE, "%d\n", 2978 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2979 } 2980 2981 static DEVICE_ATTR_RO(hotkey_radio_sw); 2982 2983 static void hotkey_radio_sw_notify_change(void) 2984 { 2985 if (tp_features.hotkey_wlsw) 2986 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2987 "hotkey_radio_sw"); 2988 } 2989 2990 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2991 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2992 struct device_attribute *attr, 2993 char *buf) 2994 { 2995 int res, s; 2996 res = hotkey_get_tablet_mode(&s); 2997 if (res < 0) 2998 return res; 2999 3000 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 3001 } 3002 3003 static DEVICE_ATTR_RO(hotkey_tablet_mode); 3004 3005 static void hotkey_tablet_mode_notify_change(void) 3006 { 3007 if (tp_features.hotkey_tablet) 3008 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3009 "hotkey_tablet_mode"); 3010 } 3011 3012 /* sysfs wakeup reason (pollable) -------------------------------------- */ 3013 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 3014 struct device_attribute *attr, 3015 char *buf) 3016 { 3017 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 3018 } 3019 3020 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 3021 3022 static void hotkey_wakeup_reason_notify_change(void) 3023 { 3024 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3025 "wakeup_reason"); 3026 } 3027 3028 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 3029 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 3030 struct device_attribute *attr, 3031 char *buf) 3032 { 3033 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 3034 } 3035 3036 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 3037 hotkey_wakeup_hotunplug_complete_show, NULL); 3038 3039 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 3040 { 3041 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3042 "wakeup_hotunplug_complete"); 3043 } 3044 3045 /* sysfs adaptive kbd mode --------------------------------------------- */ 3046 3047 static int adaptive_keyboard_get_mode(void); 3048 static int adaptive_keyboard_set_mode(int new_mode); 3049 3050 enum ADAPTIVE_KEY_MODE { 3051 HOME_MODE, 3052 WEB_BROWSER_MODE, 3053 WEB_CONFERENCE_MODE, 3054 FUNCTION_MODE, 3055 LAYFLAT_MODE 3056 }; 3057 3058 static ssize_t adaptive_kbd_mode_show(struct device *dev, 3059 struct device_attribute *attr, 3060 char *buf) 3061 { 3062 int current_mode; 3063 3064 current_mode = adaptive_keyboard_get_mode(); 3065 if (current_mode < 0) 3066 return current_mode; 3067 3068 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 3069 } 3070 3071 static ssize_t adaptive_kbd_mode_store(struct device *dev, 3072 struct device_attribute *attr, 3073 const char *buf, size_t count) 3074 { 3075 unsigned long t; 3076 int res; 3077 3078 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 3079 return -EINVAL; 3080 3081 res = adaptive_keyboard_set_mode(t); 3082 return (res < 0) ? res : count; 3083 } 3084 3085 static DEVICE_ATTR_RW(adaptive_kbd_mode); 3086 3087 static struct attribute *adaptive_kbd_attributes[] = { 3088 &dev_attr_adaptive_kbd_mode.attr, 3089 NULL 3090 }; 3091 3092 static const struct attribute_group adaptive_kbd_attr_group = { 3093 .attrs = adaptive_kbd_attributes, 3094 }; 3095 3096 /* --------------------------------------------------------------------- */ 3097 3098 static struct attribute *hotkey_attributes[] __initdata = { 3099 &dev_attr_hotkey_enable.attr, 3100 &dev_attr_hotkey_bios_enabled.attr, 3101 &dev_attr_hotkey_bios_mask.attr, 3102 &dev_attr_wakeup_reason.attr, 3103 &dev_attr_wakeup_hotunplug_complete.attr, 3104 &dev_attr_hotkey_mask.attr, 3105 &dev_attr_hotkey_all_mask.attr, 3106 &dev_attr_hotkey_adaptive_all_mask.attr, 3107 &dev_attr_hotkey_recommended_mask.attr, 3108 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3109 &dev_attr_hotkey_source_mask.attr, 3110 &dev_attr_hotkey_poll_freq.attr, 3111 #endif 3112 }; 3113 3114 /* 3115 * Sync both the hw and sw blocking state of all switches 3116 */ 3117 static void tpacpi_send_radiosw_update(void) 3118 { 3119 int wlsw; 3120 3121 /* 3122 * We must sync all rfkill controllers *before* issuing any 3123 * rfkill input events, or we will race the rfkill core input 3124 * handler. 3125 * 3126 * tpacpi_inputdev_send_mutex works as a synchronization point 3127 * for the above. 3128 * 3129 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3130 */ 3131 3132 wlsw = hotkey_get_wlsw(); 3133 3134 /* Sync hw blocking state first if it is hw-blocked */ 3135 if (wlsw == TPACPI_RFK_RADIO_OFF) 3136 tpacpi_rfk_update_hwblock_state(true); 3137 3138 /* Sync sw blocking state */ 3139 tpacpi_rfk_update_swstate_all(); 3140 3141 /* Sync hw blocking state last if it is hw-unblocked */ 3142 if (wlsw == TPACPI_RFK_RADIO_ON) 3143 tpacpi_rfk_update_hwblock_state(false); 3144 3145 /* Issue rfkill input event for WLSW switch */ 3146 if (!(wlsw < 0)) { 3147 mutex_lock(&tpacpi_inputdev_send_mutex); 3148 3149 input_report_switch(tpacpi_inputdev, 3150 SW_RFKILL_ALL, (wlsw > 0)); 3151 input_sync(tpacpi_inputdev); 3152 3153 mutex_unlock(&tpacpi_inputdev_send_mutex); 3154 } 3155 3156 /* 3157 * this can be unconditional, as we will poll state again 3158 * if userspace uses the notify to read data 3159 */ 3160 hotkey_radio_sw_notify_change(); 3161 } 3162 3163 static void hotkey_exit(void) 3164 { 3165 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3166 mutex_lock(&hotkey_mutex); 3167 hotkey_poll_stop_sync(); 3168 mutex_unlock(&hotkey_mutex); 3169 #endif 3170 3171 if (hotkey_dev_attributes) 3172 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3173 3174 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3175 "restoring original HKEY status and mask\n"); 3176 /* yes, there is a bitwise or below, we want the 3177 * functions to be called even if one of them fail */ 3178 if (((tp_features.hotkey_mask && 3179 hotkey_mask_set(hotkey_orig_mask)) | 3180 hotkey_status_set(false)) != 0) 3181 pr_err("failed to restore hot key mask to BIOS defaults\n"); 3182 } 3183 3184 static void __init hotkey_unmap(const unsigned int scancode) 3185 { 3186 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3187 clear_bit(hotkey_keycode_map[scancode], 3188 tpacpi_inputdev->keybit); 3189 hotkey_keycode_map[scancode] = KEY_RESERVED; 3190 } 3191 } 3192 3193 /* 3194 * HKEY quirks: 3195 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3196 */ 3197 3198 #define TPACPI_HK_Q_INIMASK 0x0001 3199 3200 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3201 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3202 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3203 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3204 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3205 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3206 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3207 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3208 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3209 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3210 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3211 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3212 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3213 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3214 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3215 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3216 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3217 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3218 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3219 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3220 }; 3221 3222 typedef u16 tpacpi_keymap_entry_t; 3223 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3224 3225 static int hotkey_init_tablet_mode(void) 3226 { 3227 int in_tablet_mode = 0, res; 3228 char *type = NULL; 3229 3230 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) { 3231 int has_tablet_mode; 3232 3233 in_tablet_mode = hotkey_gmms_get_tablet_mode(res, 3234 &has_tablet_mode); 3235 if (has_tablet_mode) 3236 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS; 3237 type = "GMMS"; 3238 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { 3239 /* For X41t, X60t, X61t Tablets... */ 3240 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; 3241 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); 3242 type = "MHKG"; 3243 } 3244 3245 if (!tp_features.hotkey_tablet) 3246 return 0; 3247 3248 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", 3249 type, in_tablet_mode ? "tablet" : "laptop"); 3250 3251 res = add_to_attr_set(hotkey_dev_attributes, 3252 &dev_attr_hotkey_tablet_mode.attr); 3253 if (res) 3254 return -1; 3255 3256 return in_tablet_mode; 3257 } 3258 3259 static int __init hotkey_init(struct ibm_init_struct *iibm) 3260 { 3261 /* Requirements for changing the default keymaps: 3262 * 3263 * 1. Many of the keys are mapped to KEY_RESERVED for very 3264 * good reasons. Do not change them unless you have deep 3265 * knowledge on the IBM and Lenovo ThinkPad firmware for 3266 * the various ThinkPad models. The driver behaves 3267 * differently for KEY_RESERVED: such keys have their 3268 * hot key mask *unset* in mask_recommended, and also 3269 * in the initial hot key mask programmed into the 3270 * firmware at driver load time, which means the firm- 3271 * ware may react very differently if you change them to 3272 * something else; 3273 * 3274 * 2. You must be subscribed to the linux-thinkpad and 3275 * ibm-acpi-devel mailing lists, and you should read the 3276 * list archives since 2007 if you want to change the 3277 * keymaps. This requirement exists so that you will 3278 * know the past history of problems with the thinkpad- 3279 * acpi driver keymaps, and also that you will be 3280 * listening to any bug reports; 3281 * 3282 * 3. Do not send thinkpad-acpi specific patches directly to 3283 * for merging, *ever*. Send them to the linux-acpi 3284 * mailinglist for comments. Merging is to be done only 3285 * through acpi-test and the ACPI maintainer. 3286 * 3287 * If the above is too much to ask, don't change the keymap. 3288 * Ask the thinkpad-acpi maintainer to do it, instead. 3289 */ 3290 3291 enum keymap_index { 3292 TPACPI_KEYMAP_IBM_GENERIC = 0, 3293 TPACPI_KEYMAP_LENOVO_GENERIC, 3294 }; 3295 3296 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3297 /* Generic keymap for IBM ThinkPads */ 3298 [TPACPI_KEYMAP_IBM_GENERIC] = { 3299 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3300 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3301 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3302 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3303 3304 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3305 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3306 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3307 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3308 3309 /* brightness: firmware always reacts to them */ 3310 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3311 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3312 3313 /* Thinklight: firmware always react to it */ 3314 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3315 3316 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3317 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3318 3319 /* Volume: firmware always react to it and reprograms 3320 * the built-in *extra* mixer. Never map it to control 3321 * another mixer by default. */ 3322 KEY_RESERVED, /* 0x14: VOLUME UP */ 3323 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3324 KEY_RESERVED, /* 0x16: MUTE */ 3325 3326 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3327 3328 /* (assignments unknown, please report if found) */ 3329 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3330 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3331 3332 /* No assignments, only used for Adaptive keyboards. */ 3333 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3334 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3335 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3336 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3337 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3338 3339 /* No assignment, used for newer Lenovo models */ 3340 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3341 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3342 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3343 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3344 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3345 KEY_UNKNOWN, KEY_UNKNOWN 3346 3347 }, 3348 3349 /* Generic keymap for Lenovo ThinkPads */ 3350 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3351 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3352 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3353 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3354 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3355 3356 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3357 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3358 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3359 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3360 3361 /* These should be enabled --only-- when ACPI video 3362 * is disabled (i.e. in "vendor" mode), and are handled 3363 * in a special way by the init code */ 3364 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3365 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3366 3367 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3368 3369 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3370 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3371 3372 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3373 * react to it and reprograms the built-in *extra* mixer. 3374 * Never map it to control another mixer by default. 3375 * 3376 * T60?, T61, R60?, R61: firmware and EC tries to send 3377 * these over the regular keyboard, so these are no-ops, 3378 * but there are still weird bugs re. MUTE, so do not 3379 * change unless you get test reports from all Lenovo 3380 * models. May cause the BIOS to interfere with the 3381 * HDA mixer. 3382 */ 3383 KEY_RESERVED, /* 0x14: VOLUME UP */ 3384 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3385 KEY_RESERVED, /* 0x16: MUTE */ 3386 3387 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3388 3389 /* (assignments unknown, please report if found) */ 3390 KEY_UNKNOWN, KEY_UNKNOWN, 3391 3392 /* 3393 * The mic mute button only sends 0x1a. It does not 3394 * automatically mute the mic or change the mute light. 3395 */ 3396 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3397 3398 /* (assignments unknown, please report if found) */ 3399 KEY_UNKNOWN, 3400 3401 /* Extra keys in use since the X240 / T440 / T540 */ 3402 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3403 3404 /* 3405 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3406 * The first item in this list is the Mute button which is 3407 * emitted with 0x103 through 3408 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3409 * symbol is held. 3410 * We'll need to offset those by 0x20. 3411 */ 3412 KEY_RESERVED, /* Mute held, 0x103 */ 3413 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3414 KEY_RESERVED, /* Clipping tool */ 3415 KEY_RESERVED, /* Cloud */ 3416 KEY_RESERVED, 3417 KEY_VOICECOMMAND, /* Voice */ 3418 KEY_RESERVED, 3419 KEY_RESERVED, /* Gestures */ 3420 KEY_RESERVED, 3421 KEY_RESERVED, 3422 KEY_RESERVED, 3423 KEY_CONFIG, /* Settings */ 3424 KEY_RESERVED, /* New tab */ 3425 KEY_REFRESH, /* Reload */ 3426 KEY_BACK, /* Back */ 3427 KEY_RESERVED, /* Microphone down */ 3428 KEY_RESERVED, /* Microphone up */ 3429 KEY_RESERVED, /* Microphone cancellation */ 3430 KEY_RESERVED, /* Camera mode */ 3431 KEY_RESERVED, /* Rotate display, 0x116 */ 3432 3433 /* 3434 * These are found in 2017 models (e.g. T470s, X270). 3435 * The lowest known value is 0x311, which according to 3436 * the manual should launch a user defined favorite 3437 * application. 3438 * 3439 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START, 3440 * corresponding to 0x34. 3441 */ 3442 3443 /* (assignments unknown, please report if found) */ 3444 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3445 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3446 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3447 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3448 KEY_UNKNOWN, 3449 3450 KEY_BOOKMARKS, /* Favorite app, 0x311 */ 3451 KEY_RESERVED, /* Clipping tool */ 3452 KEY_CALC, /* Calculator (above numpad, P52) */ 3453 KEY_BLUETOOTH, /* Bluetooth */ 3454 KEY_KEYBOARD /* Keyboard, 0x315 */ 3455 }, 3456 }; 3457 3458 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3459 /* Generic maps (fallback) */ 3460 { 3461 .vendor = PCI_VENDOR_ID_IBM, 3462 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3463 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3464 }, 3465 { 3466 .vendor = PCI_VENDOR_ID_LENOVO, 3467 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3468 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3469 }, 3470 }; 3471 3472 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3473 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3474 3475 int res, i; 3476 int status; 3477 int hkeyv; 3478 bool radiosw_state = false; 3479 bool tabletsw_state = false; 3480 3481 unsigned long quirks; 3482 unsigned long keymap_id; 3483 3484 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3485 "initializing hotkey subdriver\n"); 3486 3487 BUG_ON(!tpacpi_inputdev); 3488 BUG_ON(tpacpi_inputdev->open != NULL || 3489 tpacpi_inputdev->close != NULL); 3490 3491 TPACPI_ACPIHANDLE_INIT(hkey); 3492 mutex_init(&hotkey_mutex); 3493 3494 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3495 mutex_init(&hotkey_thread_data_mutex); 3496 #endif 3497 3498 /* hotkey not supported on 570 */ 3499 tp_features.hotkey = hkey_handle != NULL; 3500 3501 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3502 "hotkeys are %s\n", 3503 str_supported(tp_features.hotkey)); 3504 3505 if (!tp_features.hotkey) 3506 return 1; 3507 3508 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3509 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3510 3511 tpacpi_disable_brightness_delay(); 3512 3513 /* MUST have enough space for all attributes to be added to 3514 * hotkey_dev_attributes */ 3515 hotkey_dev_attributes = create_attr_set( 3516 ARRAY_SIZE(hotkey_attributes) + 2, 3517 NULL); 3518 if (!hotkey_dev_attributes) 3519 return -ENOMEM; 3520 res = add_many_to_attr_set(hotkey_dev_attributes, 3521 hotkey_attributes, 3522 ARRAY_SIZE(hotkey_attributes)); 3523 if (res) 3524 goto err_exit; 3525 3526 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3527 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3528 for HKEY interface version 0x100 */ 3529 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3530 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3531 "firmware HKEY interface version: 0x%x\n", 3532 hkeyv); 3533 3534 switch (hkeyv >> 8) { 3535 case 1: 3536 /* 3537 * MHKV 0x100 in A31, R40, R40e, 3538 * T4x, X31, and later 3539 */ 3540 3541 /* Paranoia check AND init hotkey_all_mask */ 3542 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3543 "MHKA", "qd")) { 3544 pr_err("missing MHKA handler, please report this to %s\n", 3545 TPACPI_MAIL); 3546 /* Fallback: pre-init for FN+F3,F4,F12 */ 3547 hotkey_all_mask = 0x080cU; 3548 } else { 3549 tp_features.hotkey_mask = 1; 3550 } 3551 break; 3552 3553 case 2: 3554 /* 3555 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3556 */ 3557 3558 /* Paranoia check AND init hotkey_all_mask */ 3559 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3560 "MHKA", "dd", 1)) { 3561 pr_err("missing MHKA handler, please report this to %s\n", 3562 TPACPI_MAIL); 3563 /* Fallback: pre-init for FN+F3,F4,F12 */ 3564 hotkey_all_mask = 0x080cU; 3565 } else { 3566 tp_features.hotkey_mask = 1; 3567 } 3568 3569 /* 3570 * Check if we have an adaptive keyboard, like on the 3571 * Lenovo Carbon X1 2014 (2nd Gen). 3572 */ 3573 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3574 "MHKA", "dd", 2)) { 3575 if (hotkey_adaptive_all_mask != 0) { 3576 tp_features.has_adaptive_kbd = true; 3577 res = sysfs_create_group( 3578 &tpacpi_pdev->dev.kobj, 3579 &adaptive_kbd_attr_group); 3580 if (res) 3581 goto err_exit; 3582 } 3583 } else { 3584 tp_features.has_adaptive_kbd = false; 3585 hotkey_adaptive_all_mask = 0x0U; 3586 } 3587 break; 3588 3589 default: 3590 pr_err("unknown version of the HKEY interface: 0x%x\n", 3591 hkeyv); 3592 pr_err("please report this to %s\n", TPACPI_MAIL); 3593 break; 3594 } 3595 } 3596 3597 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3598 "hotkey masks are %s\n", 3599 str_supported(tp_features.hotkey_mask)); 3600 3601 /* Init hotkey_all_mask if not initialized yet */ 3602 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3603 (quirks & TPACPI_HK_Q_INIMASK)) 3604 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3605 3606 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3607 if (tp_features.hotkey_mask) { 3608 /* hotkey_source_mask *must* be zero for 3609 * the first hotkey_mask_get to return hotkey_orig_mask */ 3610 res = hotkey_mask_get(); 3611 if (res) 3612 goto err_exit; 3613 3614 hotkey_orig_mask = hotkey_acpi_mask; 3615 } else { 3616 hotkey_orig_mask = hotkey_all_mask; 3617 hotkey_acpi_mask = hotkey_all_mask; 3618 } 3619 3620 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3621 if (dbg_wlswemul) { 3622 tp_features.hotkey_wlsw = 1; 3623 radiosw_state = !!tpacpi_wlsw_emulstate; 3624 pr_info("radio switch emulation enabled\n"); 3625 } else 3626 #endif 3627 /* Not all thinkpads have a hardware radio switch */ 3628 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3629 tp_features.hotkey_wlsw = 1; 3630 radiosw_state = !!status; 3631 pr_info("radio switch found; radios are %s\n", 3632 enabled(status, 0)); 3633 } 3634 if (tp_features.hotkey_wlsw) 3635 res = add_to_attr_set(hotkey_dev_attributes, 3636 &dev_attr_hotkey_radio_sw.attr); 3637 3638 res = hotkey_init_tablet_mode(); 3639 if (res < 0) 3640 goto err_exit; 3641 3642 tabletsw_state = res; 3643 3644 res = register_attr_set_with_sysfs(hotkey_dev_attributes, 3645 &tpacpi_pdev->dev.kobj); 3646 if (res) 3647 goto err_exit; 3648 3649 /* Set up key map */ 3650 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3651 ARRAY_SIZE(tpacpi_keymap_qtable)); 3652 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3653 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3654 "using keymap number %lu\n", keymap_id); 3655 3656 hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id], 3657 TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL); 3658 if (!hotkey_keycode_map) { 3659 pr_err("failed to allocate memory for key map\n"); 3660 res = -ENOMEM; 3661 goto err_exit; 3662 } 3663 3664 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3665 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3666 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3667 tpacpi_inputdev->keycode = hotkey_keycode_map; 3668 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3669 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3670 input_set_capability(tpacpi_inputdev, EV_KEY, 3671 hotkey_keycode_map[i]); 3672 } else { 3673 if (i < sizeof(hotkey_reserved_mask)*8) 3674 hotkey_reserved_mask |= 1 << i; 3675 } 3676 } 3677 3678 if (tp_features.hotkey_wlsw) { 3679 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3680 input_report_switch(tpacpi_inputdev, 3681 SW_RFKILL_ALL, radiosw_state); 3682 } 3683 if (tp_features.hotkey_tablet) { 3684 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3685 input_report_switch(tpacpi_inputdev, 3686 SW_TABLET_MODE, tabletsw_state); 3687 } 3688 3689 /* Do not issue duplicate brightness change events to 3690 * userspace. tpacpi_detect_brightness_capabilities() must have 3691 * been called before this point */ 3692 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3693 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n"); 3694 pr_notice("Disabling thinkpad-acpi brightness events by default...\n"); 3695 3696 /* Disable brightness up/down on Lenovo thinkpads when 3697 * ACPI is handling them, otherwise it is plain impossible 3698 * for userspace to do something even remotely sane */ 3699 hotkey_reserved_mask |= 3700 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3701 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3702 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3703 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3704 } 3705 3706 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3707 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3708 & ~hotkey_all_mask 3709 & ~hotkey_reserved_mask; 3710 3711 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3712 "hotkey source mask 0x%08x, polling freq %u\n", 3713 hotkey_source_mask, hotkey_poll_freq); 3714 #endif 3715 3716 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3717 "enabling firmware HKEY event interface...\n"); 3718 res = hotkey_status_set(true); 3719 if (res) { 3720 hotkey_exit(); 3721 return res; 3722 } 3723 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3724 | hotkey_driver_mask) 3725 & ~hotkey_source_mask); 3726 if (res < 0 && res != -ENXIO) { 3727 hotkey_exit(); 3728 return res; 3729 } 3730 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3731 & ~hotkey_reserved_mask; 3732 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3733 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3734 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3735 3736 tpacpi_inputdev->open = &hotkey_inputdev_open; 3737 tpacpi_inputdev->close = &hotkey_inputdev_close; 3738 3739 hotkey_poll_setup_safe(true); 3740 3741 return 0; 3742 3743 err_exit: 3744 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3745 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3746 &adaptive_kbd_attr_group); 3747 3748 hotkey_dev_attributes = NULL; 3749 3750 return (res < 0) ? res : 1; 3751 } 3752 3753 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3754 * mode, Web conference mode, Function mode and Lay-flat mode. 3755 * We support Home mode and Function mode currently. 3756 * 3757 * Will consider support rest of modes in future. 3758 * 3759 */ 3760 static const int adaptive_keyboard_modes[] = { 3761 HOME_MODE, 3762 /* WEB_BROWSER_MODE = 2, 3763 WEB_CONFERENCE_MODE = 3, */ 3764 FUNCTION_MODE 3765 }; 3766 3767 #define DFR_CHANGE_ROW 0x101 3768 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3769 #define FIRST_ADAPTIVE_KEY 0x103 3770 3771 /* press Fn key a while second, it will switch to Function Mode. Then 3772 * release Fn key, previous mode be restored. 3773 */ 3774 static bool adaptive_keyboard_mode_is_saved; 3775 static int adaptive_keyboard_prev_mode; 3776 3777 static int adaptive_keyboard_get_mode(void) 3778 { 3779 int mode = 0; 3780 3781 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3782 pr_err("Cannot read adaptive keyboard mode\n"); 3783 return -EIO; 3784 } 3785 3786 return mode; 3787 } 3788 3789 static int adaptive_keyboard_set_mode(int new_mode) 3790 { 3791 if (new_mode < 0 || 3792 new_mode > LAYFLAT_MODE) 3793 return -EINVAL; 3794 3795 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3796 pr_err("Cannot set adaptive keyboard mode\n"); 3797 return -EIO; 3798 } 3799 3800 return 0; 3801 } 3802 3803 static int adaptive_keyboard_get_next_mode(int mode) 3804 { 3805 size_t i; 3806 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3807 3808 for (i = 0; i <= max_mode; i++) { 3809 if (adaptive_keyboard_modes[i] == mode) 3810 break; 3811 } 3812 3813 if (i >= max_mode) 3814 i = 0; 3815 else 3816 i++; 3817 3818 return adaptive_keyboard_modes[i]; 3819 } 3820 3821 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3822 { 3823 int current_mode = 0; 3824 int new_mode = 0; 3825 int keycode; 3826 3827 switch (scancode) { 3828 case DFR_CHANGE_ROW: 3829 if (adaptive_keyboard_mode_is_saved) { 3830 new_mode = adaptive_keyboard_prev_mode; 3831 adaptive_keyboard_mode_is_saved = false; 3832 } else { 3833 current_mode = adaptive_keyboard_get_mode(); 3834 if (current_mode < 0) 3835 return false; 3836 new_mode = adaptive_keyboard_get_next_mode( 3837 current_mode); 3838 } 3839 3840 if (adaptive_keyboard_set_mode(new_mode) < 0) 3841 return false; 3842 3843 return true; 3844 3845 case DFR_SHOW_QUICKVIEW_ROW: 3846 current_mode = adaptive_keyboard_get_mode(); 3847 if (current_mode < 0) 3848 return false; 3849 3850 adaptive_keyboard_prev_mode = current_mode; 3851 adaptive_keyboard_mode_is_saved = true; 3852 3853 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3854 return false; 3855 return true; 3856 3857 default: 3858 if (scancode < FIRST_ADAPTIVE_KEY || 3859 scancode >= FIRST_ADAPTIVE_KEY + 3860 TP_ACPI_HOTKEYSCAN_EXTENDED_START - 3861 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3862 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3863 scancode); 3864 return false; 3865 } 3866 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + 3867 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START]; 3868 if (keycode != KEY_RESERVED) { 3869 mutex_lock(&tpacpi_inputdev_send_mutex); 3870 3871 input_report_key(tpacpi_inputdev, keycode, 1); 3872 input_sync(tpacpi_inputdev); 3873 3874 input_report_key(tpacpi_inputdev, keycode, 0); 3875 input_sync(tpacpi_inputdev); 3876 3877 mutex_unlock(&tpacpi_inputdev_send_mutex); 3878 } 3879 return true; 3880 } 3881 } 3882 3883 static bool hotkey_notify_hotkey(const u32 hkey, 3884 bool *send_acpi_ev, 3885 bool *ignore_acpi_ev) 3886 { 3887 /* 0x1000-0x1FFF: key presses */ 3888 unsigned int scancode = hkey & 0xfff; 3889 *send_acpi_ev = true; 3890 *ignore_acpi_ev = false; 3891 3892 /* 3893 * Original events are in the 0x10XX range, the adaptive keyboard 3894 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017 3895 * models, additional keys are emitted through 0x13XX. 3896 */ 3897 switch ((hkey >> 8) & 0xf) { 3898 case 0: 3899 if (scancode > 0 && 3900 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3901 /* HKEY event 0x1001 is scancode 0x00 */ 3902 scancode--; 3903 if (!(hotkey_source_mask & (1 << scancode))) { 3904 tpacpi_input_send_key_masked(scancode); 3905 *send_acpi_ev = false; 3906 } else { 3907 *ignore_acpi_ev = true; 3908 } 3909 return true; 3910 } 3911 break; 3912 3913 case 1: 3914 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3915 3916 case 3: 3917 /* Extended keycodes start at 0x300 and our offset into the map 3918 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode 3919 * will be positive, but might not be in the correct range. 3920 */ 3921 scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START); 3922 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START && 3923 scancode < TPACPI_HOTKEY_MAP_LEN) { 3924 tpacpi_input_send_key(scancode); 3925 return true; 3926 } 3927 break; 3928 } 3929 3930 return false; 3931 } 3932 3933 static bool hotkey_notify_wakeup(const u32 hkey, 3934 bool *send_acpi_ev, 3935 bool *ignore_acpi_ev) 3936 { 3937 /* 0x2000-0x2FFF: Wakeup reason */ 3938 *send_acpi_ev = true; 3939 *ignore_acpi_ev = false; 3940 3941 switch (hkey) { 3942 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3943 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3944 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3945 *ignore_acpi_ev = true; 3946 break; 3947 3948 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3949 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3950 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3951 *ignore_acpi_ev = true; 3952 break; 3953 3954 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3955 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3956 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3957 /* how to auto-heal: */ 3958 /* 2313: woke up from S3, go to S4/S5 */ 3959 /* 2413: woke up from S4, go to S5 */ 3960 break; 3961 3962 default: 3963 return false; 3964 } 3965 3966 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3967 pr_info("woke up due to a hot-unplug request...\n"); 3968 hotkey_wakeup_reason_notify_change(); 3969 } 3970 return true; 3971 } 3972 3973 static bool hotkey_notify_dockevent(const u32 hkey, 3974 bool *send_acpi_ev, 3975 bool *ignore_acpi_ev) 3976 { 3977 /* 0x4000-0x4FFF: dock-related events */ 3978 *send_acpi_ev = true; 3979 *ignore_acpi_ev = false; 3980 3981 switch (hkey) { 3982 case TP_HKEY_EV_UNDOCK_ACK: 3983 /* ACPI undock operation completed after wakeup */ 3984 hotkey_autosleep_ack = 1; 3985 pr_info("undocked\n"); 3986 hotkey_wakeup_hotunplug_complete_notify_change(); 3987 return true; 3988 3989 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3990 pr_info("docked into hotplug port replicator\n"); 3991 return true; 3992 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3993 pr_info("undocked from hotplug port replicator\n"); 3994 return true; 3995 3996 default: 3997 return false; 3998 } 3999 } 4000 4001 static bool hotkey_notify_usrevent(const u32 hkey, 4002 bool *send_acpi_ev, 4003 bool *ignore_acpi_ev) 4004 { 4005 /* 0x5000-0x5FFF: human interface helpers */ 4006 *send_acpi_ev = true; 4007 *ignore_acpi_ev = false; 4008 4009 switch (hkey) { 4010 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 4011 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 4012 return true; 4013 4014 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 4015 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 4016 tpacpi_input_send_tabletsw(); 4017 hotkey_tablet_mode_notify_change(); 4018 *send_acpi_ev = false; 4019 return true; 4020 4021 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 4022 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 4023 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 4024 /* do not propagate these events */ 4025 *ignore_acpi_ev = true; 4026 return true; 4027 4028 default: 4029 return false; 4030 } 4031 } 4032 4033 static void thermal_dump_all_sensors(void); 4034 4035 static bool hotkey_notify_6xxx(const u32 hkey, 4036 bool *send_acpi_ev, 4037 bool *ignore_acpi_ev) 4038 { 4039 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 4040 *send_acpi_ev = true; 4041 *ignore_acpi_ev = false; 4042 4043 switch (hkey) { 4044 case TP_HKEY_EV_THM_TABLE_CHANGED: 4045 pr_debug("EC reports: Thermal Table has changed\n"); 4046 /* recommended action: do nothing, we don't have 4047 * Lenovo ATM information */ 4048 return true; 4049 case TP_HKEY_EV_THM_CSM_COMPLETED: 4050 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n"); 4051 /* recommended action: do nothing, we don't have 4052 * Lenovo ATM information */ 4053 return true; 4054 case TP_HKEY_EV_THM_TRANSFM_CHANGED: 4055 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n"); 4056 /* recommended action: do nothing, we don't have 4057 * Lenovo ATM information */ 4058 return true; 4059 case TP_HKEY_EV_ALARM_BAT_HOT: 4060 pr_crit("THERMAL ALARM: battery is too hot!\n"); 4061 /* recommended action: warn user through gui */ 4062 break; 4063 case TP_HKEY_EV_ALARM_BAT_XHOT: 4064 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 4065 /* recommended action: immediate sleep/hibernate */ 4066 break; 4067 case TP_HKEY_EV_ALARM_SENSOR_HOT: 4068 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n"); 4069 /* recommended action: warn user through gui, that */ 4070 /* some internal component is too hot */ 4071 break; 4072 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 4073 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n"); 4074 /* recommended action: immediate sleep/hibernate */ 4075 break; 4076 case TP_HKEY_EV_AC_CHANGED: 4077 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 4078 * AC status changed; can be triggered by plugging or 4079 * unplugging AC adapter, docking or undocking. */ 4080 4081 /* fallthrough */ 4082 4083 case TP_HKEY_EV_KEY_NUMLOCK: 4084 case TP_HKEY_EV_KEY_FN: 4085 case TP_HKEY_EV_KEY_FN_ESC: 4086 /* key press events, we just ignore them as long as the EC 4087 * is still reporting them in the normal keyboard stream */ 4088 *send_acpi_ev = false; 4089 *ignore_acpi_ev = true; 4090 return true; 4091 4092 case TP_HKEY_EV_TABLET_CHANGED: 4093 tpacpi_input_send_tabletsw(); 4094 hotkey_tablet_mode_notify_change(); 4095 *send_acpi_ev = false; 4096 return true; 4097 4098 case TP_HKEY_EV_PALM_DETECTED: 4099 case TP_HKEY_EV_PALM_UNDETECTED: 4100 /* palm detected hovering the keyboard, forward to user-space 4101 * via netlink for consumption */ 4102 return true; 4103 4104 default: 4105 /* report simply as unknown, no sensor dump */ 4106 return false; 4107 } 4108 4109 thermal_dump_all_sensors(); 4110 return true; 4111 } 4112 4113 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 4114 { 4115 u32 hkey; 4116 bool send_acpi_ev; 4117 bool ignore_acpi_ev; 4118 bool known_ev; 4119 4120 if (event != 0x80) { 4121 pr_err("unknown HKEY notification event %d\n", event); 4122 /* forward it to userspace, maybe it knows how to handle it */ 4123 acpi_bus_generate_netlink_event( 4124 ibm->acpi->device->pnp.device_class, 4125 dev_name(&ibm->acpi->device->dev), 4126 event, 0); 4127 return; 4128 } 4129 4130 while (1) { 4131 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 4132 pr_err("failed to retrieve HKEY event\n"); 4133 return; 4134 } 4135 4136 if (hkey == 0) { 4137 /* queue empty */ 4138 return; 4139 } 4140 4141 send_acpi_ev = true; 4142 ignore_acpi_ev = false; 4143 4144 switch (hkey >> 12) { 4145 case 1: 4146 /* 0x1000-0x1FFF: key presses */ 4147 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 4148 &ignore_acpi_ev); 4149 break; 4150 case 2: 4151 /* 0x2000-0x2FFF: Wakeup reason */ 4152 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 4153 &ignore_acpi_ev); 4154 break; 4155 case 3: 4156 /* 0x3000-0x3FFF: bay-related wakeups */ 4157 switch (hkey) { 4158 case TP_HKEY_EV_BAYEJ_ACK: 4159 hotkey_autosleep_ack = 1; 4160 pr_info("bay ejected\n"); 4161 hotkey_wakeup_hotunplug_complete_notify_change(); 4162 known_ev = true; 4163 break; 4164 case TP_HKEY_EV_OPTDRV_EJ: 4165 /* FIXME: kick libata if SATA link offline */ 4166 known_ev = true; 4167 break; 4168 default: 4169 known_ev = false; 4170 } 4171 break; 4172 case 4: 4173 /* 0x4000-0x4FFF: dock-related events */ 4174 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 4175 &ignore_acpi_ev); 4176 break; 4177 case 5: 4178 /* 0x5000-0x5FFF: human interface helpers */ 4179 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 4180 &ignore_acpi_ev); 4181 break; 4182 case 6: 4183 /* 0x6000-0x6FFF: thermal alarms/notices and 4184 * keyboard events */ 4185 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 4186 &ignore_acpi_ev); 4187 break; 4188 case 7: 4189 /* 0x7000-0x7FFF: misc */ 4190 if (tp_features.hotkey_wlsw && 4191 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 4192 tpacpi_send_radiosw_update(); 4193 send_acpi_ev = 0; 4194 known_ev = true; 4195 break; 4196 } 4197 /* fallthrough - to default */ 4198 default: 4199 known_ev = false; 4200 } 4201 if (!known_ev) { 4202 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4203 pr_notice("please report the conditions when this event happened to %s\n", 4204 TPACPI_MAIL); 4205 } 4206 4207 /* netlink events */ 4208 if (!ignore_acpi_ev && send_acpi_ev) { 4209 acpi_bus_generate_netlink_event( 4210 ibm->acpi->device->pnp.device_class, 4211 dev_name(&ibm->acpi->device->dev), 4212 event, hkey); 4213 } 4214 } 4215 } 4216 4217 static void hotkey_suspend(void) 4218 { 4219 /* Do these on suspend, we get the events on early resume! */ 4220 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4221 hotkey_autosleep_ack = 0; 4222 4223 /* save previous mode of adaptive keyboard of X1 Carbon */ 4224 if (tp_features.has_adaptive_kbd) { 4225 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4226 "GTRW", "dd", 0)) { 4227 pr_err("Cannot read adaptive keyboard mode.\n"); 4228 } 4229 } 4230 } 4231 4232 static void hotkey_resume(void) 4233 { 4234 tpacpi_disable_brightness_delay(); 4235 4236 if (hotkey_status_set(true) < 0 || 4237 hotkey_mask_set(hotkey_acpi_mask) < 0) 4238 pr_err("error while attempting to reset the event firmware interface\n"); 4239 4240 tpacpi_send_radiosw_update(); 4241 hotkey_tablet_mode_notify_change(); 4242 hotkey_wakeup_reason_notify_change(); 4243 hotkey_wakeup_hotunplug_complete_notify_change(); 4244 hotkey_poll_setup_safe(false); 4245 4246 /* restore previous mode of adapive keyboard of X1 Carbon */ 4247 if (tp_features.has_adaptive_kbd) { 4248 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4249 adaptive_keyboard_prev_mode)) { 4250 pr_err("Cannot set adaptive keyboard mode.\n"); 4251 } 4252 } 4253 } 4254 4255 /* procfs -------------------------------------------------------------- */ 4256 static int hotkey_read(struct seq_file *m) 4257 { 4258 int res, status; 4259 4260 if (!tp_features.hotkey) { 4261 seq_printf(m, "status:\t\tnot supported\n"); 4262 return 0; 4263 } 4264 4265 if (mutex_lock_killable(&hotkey_mutex)) 4266 return -ERESTARTSYS; 4267 res = hotkey_status_get(&status); 4268 if (!res) 4269 res = hotkey_mask_get(); 4270 mutex_unlock(&hotkey_mutex); 4271 if (res) 4272 return res; 4273 4274 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4275 if (hotkey_all_mask) { 4276 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4277 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4278 } else { 4279 seq_printf(m, "mask:\t\tnot supported\n"); 4280 seq_printf(m, "commands:\tenable, disable, reset\n"); 4281 } 4282 4283 return 0; 4284 } 4285 4286 static void hotkey_enabledisable_warn(bool enable) 4287 { 4288 tpacpi_log_usertask("procfs hotkey enable/disable"); 4289 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4290 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n"))) 4291 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n"); 4292 } 4293 4294 static int hotkey_write(char *buf) 4295 { 4296 int res; 4297 u32 mask; 4298 char *cmd; 4299 4300 if (!tp_features.hotkey) 4301 return -ENODEV; 4302 4303 if (mutex_lock_killable(&hotkey_mutex)) 4304 return -ERESTARTSYS; 4305 4306 mask = hotkey_user_mask; 4307 4308 res = 0; 4309 while ((cmd = next_cmd(&buf))) { 4310 if (strlencmp(cmd, "enable") == 0) { 4311 hotkey_enabledisable_warn(1); 4312 } else if (strlencmp(cmd, "disable") == 0) { 4313 hotkey_enabledisable_warn(0); 4314 res = -EPERM; 4315 } else if (strlencmp(cmd, "reset") == 0) { 4316 mask = (hotkey_all_mask | hotkey_source_mask) 4317 & ~hotkey_reserved_mask; 4318 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4319 /* mask set */ 4320 } else if (sscanf(cmd, "%x", &mask) == 1) { 4321 /* mask set */ 4322 } else { 4323 res = -EINVAL; 4324 goto errexit; 4325 } 4326 } 4327 4328 if (!res) { 4329 tpacpi_disclose_usertask("procfs hotkey", 4330 "set mask to 0x%08x\n", mask); 4331 res = hotkey_user_mask_set(mask); 4332 } 4333 4334 errexit: 4335 mutex_unlock(&hotkey_mutex); 4336 return res; 4337 } 4338 4339 static const struct acpi_device_id ibm_htk_device_ids[] = { 4340 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4341 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4342 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0}, 4343 {"", 0}, 4344 }; 4345 4346 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4347 .hid = ibm_htk_device_ids, 4348 .notify = hotkey_notify, 4349 .handle = &hkey_handle, 4350 .type = ACPI_DEVICE_NOTIFY, 4351 }; 4352 4353 static struct ibm_struct hotkey_driver_data = { 4354 .name = "hotkey", 4355 .read = hotkey_read, 4356 .write = hotkey_write, 4357 .exit = hotkey_exit, 4358 .resume = hotkey_resume, 4359 .suspend = hotkey_suspend, 4360 .acpi = &ibm_hotkey_acpidriver, 4361 }; 4362 4363 /************************************************************************* 4364 * Bluetooth subdriver 4365 */ 4366 4367 enum { 4368 /* ACPI GBDC/SBDC bits */ 4369 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4370 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4371 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4372 0 = disable, 1 = enable */ 4373 }; 4374 4375 enum { 4376 /* ACPI \BLTH commands */ 4377 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4378 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4379 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4380 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4381 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4382 }; 4383 4384 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4385 4386 static int bluetooth_get_status(void) 4387 { 4388 int status; 4389 4390 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4391 if (dbg_bluetoothemul) 4392 return (tpacpi_bluetooth_emulstate) ? 4393 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4394 #endif 4395 4396 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4397 return -EIO; 4398 4399 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4400 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4401 } 4402 4403 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4404 { 4405 int status; 4406 4407 vdbg_printk(TPACPI_DBG_RFKILL, 4408 "will attempt to %s bluetooth\n", 4409 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4410 4411 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4412 if (dbg_bluetoothemul) { 4413 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4414 return 0; 4415 } 4416 #endif 4417 4418 if (state == TPACPI_RFK_RADIO_ON) 4419 status = TP_ACPI_BLUETOOTH_RADIOSSW 4420 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4421 else 4422 status = 0; 4423 4424 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4425 return -EIO; 4426 4427 return 0; 4428 } 4429 4430 /* sysfs bluetooth enable ---------------------------------------------- */ 4431 static ssize_t bluetooth_enable_show(struct device *dev, 4432 struct device_attribute *attr, 4433 char *buf) 4434 { 4435 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4436 attr, buf); 4437 } 4438 4439 static ssize_t bluetooth_enable_store(struct device *dev, 4440 struct device_attribute *attr, 4441 const char *buf, size_t count) 4442 { 4443 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4444 attr, buf, count); 4445 } 4446 4447 static DEVICE_ATTR_RW(bluetooth_enable); 4448 4449 /* --------------------------------------------------------------------- */ 4450 4451 static struct attribute *bluetooth_attributes[] = { 4452 &dev_attr_bluetooth_enable.attr, 4453 NULL 4454 }; 4455 4456 static const struct attribute_group bluetooth_attr_group = { 4457 .attrs = bluetooth_attributes, 4458 }; 4459 4460 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4461 .get_status = bluetooth_get_status, 4462 .set_status = bluetooth_set_status, 4463 }; 4464 4465 static void bluetooth_shutdown(void) 4466 { 4467 /* Order firmware to save current state to NVRAM */ 4468 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4469 TP_ACPI_BLTH_SAVE_STATE)) 4470 pr_notice("failed to save bluetooth state to NVRAM\n"); 4471 else 4472 vdbg_printk(TPACPI_DBG_RFKILL, 4473 "bluetooth state saved to NVRAM\n"); 4474 } 4475 4476 static void bluetooth_exit(void) 4477 { 4478 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4479 &bluetooth_attr_group); 4480 4481 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4482 4483 bluetooth_shutdown(); 4484 } 4485 4486 static const struct dmi_system_id bt_fwbug_list[] __initconst = { 4487 { 4488 .ident = "ThinkPad E485", 4489 .matches = { 4490 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4491 DMI_MATCH(DMI_BOARD_NAME, "20KU"), 4492 }, 4493 }, 4494 { 4495 .ident = "ThinkPad E585", 4496 .matches = { 4497 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4498 DMI_MATCH(DMI_BOARD_NAME, "20KV"), 4499 }, 4500 }, 4501 { 4502 .ident = "ThinkPad A285 - 20MW", 4503 .matches = { 4504 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4505 DMI_MATCH(DMI_BOARD_NAME, "20MW"), 4506 }, 4507 }, 4508 { 4509 .ident = "ThinkPad A285 - 20MX", 4510 .matches = { 4511 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4512 DMI_MATCH(DMI_BOARD_NAME, "20MX"), 4513 }, 4514 }, 4515 { 4516 .ident = "ThinkPad A485 - 20MU", 4517 .matches = { 4518 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4519 DMI_MATCH(DMI_BOARD_NAME, "20MU"), 4520 }, 4521 }, 4522 { 4523 .ident = "ThinkPad A485 - 20MV", 4524 .matches = { 4525 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4526 DMI_MATCH(DMI_BOARD_NAME, "20MV"), 4527 }, 4528 }, 4529 {} 4530 }; 4531 4532 static const struct pci_device_id fwbug_cards_ids[] __initconst = { 4533 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) }, 4534 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) }, 4535 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) }, 4536 {} 4537 }; 4538 4539 4540 static int __init have_bt_fwbug(void) 4541 { 4542 /* 4543 * Some AMD based ThinkPads have a firmware bug that calling 4544 * "GBDC" will cause bluetooth on Intel wireless cards blocked 4545 */ 4546 if (dmi_check_system(bt_fwbug_list) && pci_dev_present(fwbug_cards_ids)) { 4547 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4548 FW_BUG "disable bluetooth subdriver for Intel cards\n"); 4549 return 1; 4550 } else 4551 return 0; 4552 } 4553 4554 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4555 { 4556 int res; 4557 int status = 0; 4558 4559 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4560 "initializing bluetooth subdriver\n"); 4561 4562 TPACPI_ACPIHANDLE_INIT(hkey); 4563 4564 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4565 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4566 tp_features.bluetooth = !have_bt_fwbug() && hkey_handle && 4567 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4568 4569 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4570 "bluetooth is %s, status 0x%02x\n", 4571 str_supported(tp_features.bluetooth), 4572 status); 4573 4574 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4575 if (dbg_bluetoothemul) { 4576 tp_features.bluetooth = 1; 4577 pr_info("bluetooth switch emulation enabled\n"); 4578 } else 4579 #endif 4580 if (tp_features.bluetooth && 4581 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4582 /* no bluetooth hardware present in system */ 4583 tp_features.bluetooth = 0; 4584 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4585 "bluetooth hardware not installed\n"); 4586 } 4587 4588 if (!tp_features.bluetooth) 4589 return 1; 4590 4591 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4592 &bluetooth_tprfk_ops, 4593 RFKILL_TYPE_BLUETOOTH, 4594 TPACPI_RFK_BLUETOOTH_SW_NAME, 4595 true); 4596 if (res) 4597 return res; 4598 4599 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4600 &bluetooth_attr_group); 4601 if (res) { 4602 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4603 return res; 4604 } 4605 4606 return 0; 4607 } 4608 4609 /* procfs -------------------------------------------------------------- */ 4610 static int bluetooth_read(struct seq_file *m) 4611 { 4612 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4613 } 4614 4615 static int bluetooth_write(char *buf) 4616 { 4617 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4618 } 4619 4620 static struct ibm_struct bluetooth_driver_data = { 4621 .name = "bluetooth", 4622 .read = bluetooth_read, 4623 .write = bluetooth_write, 4624 .exit = bluetooth_exit, 4625 .shutdown = bluetooth_shutdown, 4626 }; 4627 4628 /************************************************************************* 4629 * Wan subdriver 4630 */ 4631 4632 enum { 4633 /* ACPI GWAN/SWAN bits */ 4634 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4635 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4636 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4637 0 = disable, 1 = enable */ 4638 }; 4639 4640 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4641 4642 static int wan_get_status(void) 4643 { 4644 int status; 4645 4646 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4647 if (dbg_wwanemul) 4648 return (tpacpi_wwan_emulstate) ? 4649 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4650 #endif 4651 4652 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4653 return -EIO; 4654 4655 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4656 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4657 } 4658 4659 static int wan_set_status(enum tpacpi_rfkill_state state) 4660 { 4661 int status; 4662 4663 vdbg_printk(TPACPI_DBG_RFKILL, 4664 "will attempt to %s wwan\n", 4665 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4666 4667 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4668 if (dbg_wwanemul) { 4669 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4670 return 0; 4671 } 4672 #endif 4673 4674 if (state == TPACPI_RFK_RADIO_ON) 4675 status = TP_ACPI_WANCARD_RADIOSSW 4676 | TP_ACPI_WANCARD_RESUMECTRL; 4677 else 4678 status = 0; 4679 4680 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4681 return -EIO; 4682 4683 return 0; 4684 } 4685 4686 /* sysfs wan enable ---------------------------------------------------- */ 4687 static ssize_t wan_enable_show(struct device *dev, 4688 struct device_attribute *attr, 4689 char *buf) 4690 { 4691 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4692 attr, buf); 4693 } 4694 4695 static ssize_t wan_enable_store(struct device *dev, 4696 struct device_attribute *attr, 4697 const char *buf, size_t count) 4698 { 4699 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4700 attr, buf, count); 4701 } 4702 4703 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4704 wan_enable_show, wan_enable_store); 4705 4706 /* --------------------------------------------------------------------- */ 4707 4708 static struct attribute *wan_attributes[] = { 4709 &dev_attr_wwan_enable.attr, 4710 NULL 4711 }; 4712 4713 static const struct attribute_group wan_attr_group = { 4714 .attrs = wan_attributes, 4715 }; 4716 4717 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4718 .get_status = wan_get_status, 4719 .set_status = wan_set_status, 4720 }; 4721 4722 static void wan_shutdown(void) 4723 { 4724 /* Order firmware to save current state to NVRAM */ 4725 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4726 TP_ACPI_WGSV_SAVE_STATE)) 4727 pr_notice("failed to save WWAN state to NVRAM\n"); 4728 else 4729 vdbg_printk(TPACPI_DBG_RFKILL, 4730 "WWAN state saved to NVRAM\n"); 4731 } 4732 4733 static void wan_exit(void) 4734 { 4735 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4736 &wan_attr_group); 4737 4738 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4739 4740 wan_shutdown(); 4741 } 4742 4743 static int __init wan_init(struct ibm_init_struct *iibm) 4744 { 4745 int res; 4746 int status = 0; 4747 4748 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4749 "initializing wan subdriver\n"); 4750 4751 TPACPI_ACPIHANDLE_INIT(hkey); 4752 4753 tp_features.wan = hkey_handle && 4754 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4755 4756 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4757 "wan is %s, status 0x%02x\n", 4758 str_supported(tp_features.wan), 4759 status); 4760 4761 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4762 if (dbg_wwanemul) { 4763 tp_features.wan = 1; 4764 pr_info("wwan switch emulation enabled\n"); 4765 } else 4766 #endif 4767 if (tp_features.wan && 4768 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4769 /* no wan hardware present in system */ 4770 tp_features.wan = 0; 4771 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4772 "wan hardware not installed\n"); 4773 } 4774 4775 if (!tp_features.wan) 4776 return 1; 4777 4778 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4779 &wan_tprfk_ops, 4780 RFKILL_TYPE_WWAN, 4781 TPACPI_RFK_WWAN_SW_NAME, 4782 true); 4783 if (res) 4784 return res; 4785 4786 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4787 &wan_attr_group); 4788 4789 if (res) { 4790 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4791 return res; 4792 } 4793 4794 return 0; 4795 } 4796 4797 /* procfs -------------------------------------------------------------- */ 4798 static int wan_read(struct seq_file *m) 4799 { 4800 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4801 } 4802 4803 static int wan_write(char *buf) 4804 { 4805 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4806 } 4807 4808 static struct ibm_struct wan_driver_data = { 4809 .name = "wan", 4810 .read = wan_read, 4811 .write = wan_write, 4812 .exit = wan_exit, 4813 .shutdown = wan_shutdown, 4814 }; 4815 4816 /************************************************************************* 4817 * UWB subdriver 4818 */ 4819 4820 enum { 4821 /* ACPI GUWB/SUWB bits */ 4822 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4823 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4824 }; 4825 4826 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4827 4828 static int uwb_get_status(void) 4829 { 4830 int status; 4831 4832 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4833 if (dbg_uwbemul) 4834 return (tpacpi_uwb_emulstate) ? 4835 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4836 #endif 4837 4838 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4839 return -EIO; 4840 4841 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4842 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4843 } 4844 4845 static int uwb_set_status(enum tpacpi_rfkill_state state) 4846 { 4847 int status; 4848 4849 vdbg_printk(TPACPI_DBG_RFKILL, 4850 "will attempt to %s UWB\n", 4851 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4852 4853 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4854 if (dbg_uwbemul) { 4855 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4856 return 0; 4857 } 4858 #endif 4859 4860 if (state == TPACPI_RFK_RADIO_ON) 4861 status = TP_ACPI_UWB_RADIOSSW; 4862 else 4863 status = 0; 4864 4865 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4866 return -EIO; 4867 4868 return 0; 4869 } 4870 4871 /* --------------------------------------------------------------------- */ 4872 4873 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4874 .get_status = uwb_get_status, 4875 .set_status = uwb_set_status, 4876 }; 4877 4878 static void uwb_exit(void) 4879 { 4880 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4881 } 4882 4883 static int __init uwb_init(struct ibm_init_struct *iibm) 4884 { 4885 int res; 4886 int status = 0; 4887 4888 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4889 "initializing uwb subdriver\n"); 4890 4891 TPACPI_ACPIHANDLE_INIT(hkey); 4892 4893 tp_features.uwb = hkey_handle && 4894 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4895 4896 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4897 "uwb is %s, status 0x%02x\n", 4898 str_supported(tp_features.uwb), 4899 status); 4900 4901 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4902 if (dbg_uwbemul) { 4903 tp_features.uwb = 1; 4904 pr_info("uwb switch emulation enabled\n"); 4905 } else 4906 #endif 4907 if (tp_features.uwb && 4908 !(status & TP_ACPI_UWB_HWPRESENT)) { 4909 /* no uwb hardware present in system */ 4910 tp_features.uwb = 0; 4911 dbg_printk(TPACPI_DBG_INIT, 4912 "uwb hardware not installed\n"); 4913 } 4914 4915 if (!tp_features.uwb) 4916 return 1; 4917 4918 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4919 &uwb_tprfk_ops, 4920 RFKILL_TYPE_UWB, 4921 TPACPI_RFK_UWB_SW_NAME, 4922 false); 4923 return res; 4924 } 4925 4926 static struct ibm_struct uwb_driver_data = { 4927 .name = "uwb", 4928 .exit = uwb_exit, 4929 .flags.experimental = 1, 4930 }; 4931 4932 /************************************************************************* 4933 * Video subdriver 4934 */ 4935 4936 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4937 4938 enum video_access_mode { 4939 TPACPI_VIDEO_NONE = 0, 4940 TPACPI_VIDEO_570, /* 570 */ 4941 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4942 TPACPI_VIDEO_NEW, /* all others */ 4943 }; 4944 4945 enum { /* video status flags, based on VIDEO_570 */ 4946 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4947 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4948 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4949 }; 4950 4951 enum { /* TPACPI_VIDEO_570 constants */ 4952 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4953 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4954 * video_status_flags */ 4955 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4956 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4957 }; 4958 4959 static enum video_access_mode video_supported; 4960 static int video_orig_autosw; 4961 4962 static int video_autosw_get(void); 4963 static int video_autosw_set(int enable); 4964 4965 TPACPI_HANDLE(vid, root, 4966 "\\_SB.PCI.AGP.VGA", /* 570 */ 4967 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4968 "\\_SB.PCI0.VID0", /* 770e */ 4969 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4970 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4971 "\\_SB.PCI0.AGP.VID", /* all others */ 4972 ); /* R30, R31 */ 4973 4974 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4975 4976 static int __init video_init(struct ibm_init_struct *iibm) 4977 { 4978 int ivga; 4979 4980 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4981 4982 TPACPI_ACPIHANDLE_INIT(vid); 4983 if (tpacpi_is_ibm()) 4984 TPACPI_ACPIHANDLE_INIT(vid2); 4985 4986 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4987 /* G41, assume IVGA doesn't change */ 4988 vid_handle = vid2_handle; 4989 4990 if (!vid_handle) 4991 /* video switching not supported on R30, R31 */ 4992 video_supported = TPACPI_VIDEO_NONE; 4993 else if (tpacpi_is_ibm() && 4994 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4995 /* 570 */ 4996 video_supported = TPACPI_VIDEO_570; 4997 else if (tpacpi_is_ibm() && 4998 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4999 /* 600e/x, 770e, 770x */ 5000 video_supported = TPACPI_VIDEO_770; 5001 else 5002 /* all others */ 5003 video_supported = TPACPI_VIDEO_NEW; 5004 5005 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 5006 str_supported(video_supported != TPACPI_VIDEO_NONE), 5007 video_supported); 5008 5009 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 5010 } 5011 5012 static void video_exit(void) 5013 { 5014 dbg_printk(TPACPI_DBG_EXIT, 5015 "restoring original video autoswitch mode\n"); 5016 if (video_autosw_set(video_orig_autosw)) 5017 pr_err("error while trying to restore original video autoswitch mode\n"); 5018 } 5019 5020 static int video_outputsw_get(void) 5021 { 5022 int status = 0; 5023 int i; 5024 5025 switch (video_supported) { 5026 case TPACPI_VIDEO_570: 5027 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 5028 TP_ACPI_VIDEO_570_PHSCMD)) 5029 return -EIO; 5030 status = i & TP_ACPI_VIDEO_570_PHSMASK; 5031 break; 5032 case TPACPI_VIDEO_770: 5033 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 5034 return -EIO; 5035 if (i) 5036 status |= TP_ACPI_VIDEO_S_LCD; 5037 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 5038 return -EIO; 5039 if (i) 5040 status |= TP_ACPI_VIDEO_S_CRT; 5041 break; 5042 case TPACPI_VIDEO_NEW: 5043 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 5044 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 5045 return -EIO; 5046 if (i) 5047 status |= TP_ACPI_VIDEO_S_CRT; 5048 5049 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 5050 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 5051 return -EIO; 5052 if (i) 5053 status |= TP_ACPI_VIDEO_S_LCD; 5054 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 5055 return -EIO; 5056 if (i) 5057 status |= TP_ACPI_VIDEO_S_DVI; 5058 break; 5059 default: 5060 return -ENOSYS; 5061 } 5062 5063 return status; 5064 } 5065 5066 static int video_outputsw_set(int status) 5067 { 5068 int autosw; 5069 int res = 0; 5070 5071 switch (video_supported) { 5072 case TPACPI_VIDEO_570: 5073 res = acpi_evalf(NULL, NULL, 5074 "\\_SB.PHS2", "vdd", 5075 TP_ACPI_VIDEO_570_PHS2CMD, 5076 status | TP_ACPI_VIDEO_570_PHS2SET); 5077 break; 5078 case TPACPI_VIDEO_770: 5079 autosw = video_autosw_get(); 5080 if (autosw < 0) 5081 return autosw; 5082 5083 res = video_autosw_set(1); 5084 if (res) 5085 return res; 5086 res = acpi_evalf(vid_handle, NULL, 5087 "ASWT", "vdd", status * 0x100, 0); 5088 if (!autosw && video_autosw_set(autosw)) { 5089 pr_err("video auto-switch left enabled due to error\n"); 5090 return -EIO; 5091 } 5092 break; 5093 case TPACPI_VIDEO_NEW: 5094 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 5095 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 5096 break; 5097 default: 5098 return -ENOSYS; 5099 } 5100 5101 return (res) ? 0 : -EIO; 5102 } 5103 5104 static int video_autosw_get(void) 5105 { 5106 int autosw = 0; 5107 5108 switch (video_supported) { 5109 case TPACPI_VIDEO_570: 5110 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 5111 return -EIO; 5112 break; 5113 case TPACPI_VIDEO_770: 5114 case TPACPI_VIDEO_NEW: 5115 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 5116 return -EIO; 5117 break; 5118 default: 5119 return -ENOSYS; 5120 } 5121 5122 return autosw & 1; 5123 } 5124 5125 static int video_autosw_set(int enable) 5126 { 5127 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 5128 return -EIO; 5129 return 0; 5130 } 5131 5132 static int video_outputsw_cycle(void) 5133 { 5134 int autosw = video_autosw_get(); 5135 int res; 5136 5137 if (autosw < 0) 5138 return autosw; 5139 5140 switch (video_supported) { 5141 case TPACPI_VIDEO_570: 5142 res = video_autosw_set(1); 5143 if (res) 5144 return res; 5145 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 5146 break; 5147 case TPACPI_VIDEO_770: 5148 case TPACPI_VIDEO_NEW: 5149 res = video_autosw_set(1); 5150 if (res) 5151 return res; 5152 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 5153 break; 5154 default: 5155 return -ENOSYS; 5156 } 5157 if (!autosw && video_autosw_set(autosw)) { 5158 pr_err("video auto-switch left enabled due to error\n"); 5159 return -EIO; 5160 } 5161 5162 return (res) ? 0 : -EIO; 5163 } 5164 5165 static int video_expand_toggle(void) 5166 { 5167 switch (video_supported) { 5168 case TPACPI_VIDEO_570: 5169 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 5170 0 : -EIO; 5171 case TPACPI_VIDEO_770: 5172 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 5173 0 : -EIO; 5174 case TPACPI_VIDEO_NEW: 5175 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 5176 0 : -EIO; 5177 default: 5178 return -ENOSYS; 5179 } 5180 /* not reached */ 5181 } 5182 5183 static int video_read(struct seq_file *m) 5184 { 5185 int status, autosw; 5186 5187 if (video_supported == TPACPI_VIDEO_NONE) { 5188 seq_printf(m, "status:\t\tnot supported\n"); 5189 return 0; 5190 } 5191 5192 /* Even reads can crash X.org, so... */ 5193 if (!capable(CAP_SYS_ADMIN)) 5194 return -EPERM; 5195 5196 status = video_outputsw_get(); 5197 if (status < 0) 5198 return status; 5199 5200 autosw = video_autosw_get(); 5201 if (autosw < 0) 5202 return autosw; 5203 5204 seq_printf(m, "status:\t\tsupported\n"); 5205 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 5206 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 5207 if (video_supported == TPACPI_VIDEO_NEW) 5208 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 5209 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 5210 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5211 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5212 if (video_supported == TPACPI_VIDEO_NEW) 5213 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5214 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5215 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5216 5217 return 0; 5218 } 5219 5220 static int video_write(char *buf) 5221 { 5222 char *cmd; 5223 int enable, disable, status; 5224 int res; 5225 5226 if (video_supported == TPACPI_VIDEO_NONE) 5227 return -ENODEV; 5228 5229 /* Even reads can crash X.org, let alone writes... */ 5230 if (!capable(CAP_SYS_ADMIN)) 5231 return -EPERM; 5232 5233 enable = 0; 5234 disable = 0; 5235 5236 while ((cmd = next_cmd(&buf))) { 5237 if (strlencmp(cmd, "lcd_enable") == 0) { 5238 enable |= TP_ACPI_VIDEO_S_LCD; 5239 } else if (strlencmp(cmd, "lcd_disable") == 0) { 5240 disable |= TP_ACPI_VIDEO_S_LCD; 5241 } else if (strlencmp(cmd, "crt_enable") == 0) { 5242 enable |= TP_ACPI_VIDEO_S_CRT; 5243 } else if (strlencmp(cmd, "crt_disable") == 0) { 5244 disable |= TP_ACPI_VIDEO_S_CRT; 5245 } else if (video_supported == TPACPI_VIDEO_NEW && 5246 strlencmp(cmd, "dvi_enable") == 0) { 5247 enable |= TP_ACPI_VIDEO_S_DVI; 5248 } else if (video_supported == TPACPI_VIDEO_NEW && 5249 strlencmp(cmd, "dvi_disable") == 0) { 5250 disable |= TP_ACPI_VIDEO_S_DVI; 5251 } else if (strlencmp(cmd, "auto_enable") == 0) { 5252 res = video_autosw_set(1); 5253 if (res) 5254 return res; 5255 } else if (strlencmp(cmd, "auto_disable") == 0) { 5256 res = video_autosw_set(0); 5257 if (res) 5258 return res; 5259 } else if (strlencmp(cmd, "video_switch") == 0) { 5260 res = video_outputsw_cycle(); 5261 if (res) 5262 return res; 5263 } else if (strlencmp(cmd, "expand_toggle") == 0) { 5264 res = video_expand_toggle(); 5265 if (res) 5266 return res; 5267 } else 5268 return -EINVAL; 5269 } 5270 5271 if (enable || disable) { 5272 status = video_outputsw_get(); 5273 if (status < 0) 5274 return status; 5275 res = video_outputsw_set((status & ~disable) | enable); 5276 if (res) 5277 return res; 5278 } 5279 5280 return 0; 5281 } 5282 5283 static struct ibm_struct video_driver_data = { 5284 .name = "video", 5285 .read = video_read, 5286 .write = video_write, 5287 .exit = video_exit, 5288 }; 5289 5290 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5291 5292 /************************************************************************* 5293 * Keyboard backlight subdriver 5294 */ 5295 5296 static enum led_brightness kbdlight_brightness; 5297 static DEFINE_MUTEX(kbdlight_mutex); 5298 5299 static int kbdlight_set_level(int level) 5300 { 5301 int ret = 0; 5302 5303 if (!hkey_handle) 5304 return -ENXIO; 5305 5306 mutex_lock(&kbdlight_mutex); 5307 5308 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5309 ret = -EIO; 5310 else 5311 kbdlight_brightness = level; 5312 5313 mutex_unlock(&kbdlight_mutex); 5314 5315 return ret; 5316 } 5317 5318 static int kbdlight_get_level(void) 5319 { 5320 int status = 0; 5321 5322 if (!hkey_handle) 5323 return -ENXIO; 5324 5325 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5326 return -EIO; 5327 5328 if (status < 0) 5329 return status; 5330 5331 return status & 0x3; 5332 } 5333 5334 static bool kbdlight_is_supported(void) 5335 { 5336 int status = 0; 5337 5338 if (!hkey_handle) 5339 return false; 5340 5341 if (!acpi_has_method(hkey_handle, "MLCG")) { 5342 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5343 return false; 5344 } 5345 5346 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5347 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5348 return false; 5349 } 5350 5351 if (status < 0) { 5352 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5353 return false; 5354 } 5355 5356 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5357 /* 5358 * Guessed test for keyboard backlight: 5359 * 5360 * Machines with backlight keyboard return: 5361 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5362 * b110100010010000000XX - ThinkPad x230 5363 * b010100000010000000XX - ThinkPad x240 5364 * b010100000010000000XX - ThinkPad W541 5365 * (XX is current backlight level) 5366 * 5367 * Machines without backlight keyboard return: 5368 * b10100001000000000000 - ThinkPad x230 5369 * b10110001000000000000 - ThinkPad E430 5370 * b00000000000000000000 - ThinkPad E450 5371 * 5372 * Candidate BITs for detection test (XOR): 5373 * b01000000001000000000 5374 * ^ 5375 */ 5376 return status & BIT(9); 5377 } 5378 5379 static int kbdlight_sysfs_set(struct led_classdev *led_cdev, 5380 enum led_brightness brightness) 5381 { 5382 return kbdlight_set_level(brightness); 5383 } 5384 5385 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5386 { 5387 int level; 5388 5389 level = kbdlight_get_level(); 5390 if (level < 0) 5391 return 0; 5392 5393 return level; 5394 } 5395 5396 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5397 .led_classdev = { 5398 .name = "tpacpi::kbd_backlight", 5399 .max_brightness = 2, 5400 .flags = LED_BRIGHT_HW_CHANGED, 5401 .brightness_set_blocking = &kbdlight_sysfs_set, 5402 .brightness_get = &kbdlight_sysfs_get, 5403 } 5404 }; 5405 5406 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5407 { 5408 int rc; 5409 5410 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5411 5412 TPACPI_ACPIHANDLE_INIT(hkey); 5413 5414 if (!kbdlight_is_supported()) { 5415 tp_features.kbdlight = 0; 5416 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5417 return 1; 5418 } 5419 5420 kbdlight_brightness = kbdlight_sysfs_get(NULL); 5421 tp_features.kbdlight = 1; 5422 5423 rc = led_classdev_register(&tpacpi_pdev->dev, 5424 &tpacpi_led_kbdlight.led_classdev); 5425 if (rc < 0) { 5426 tp_features.kbdlight = 0; 5427 return rc; 5428 } 5429 5430 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask | 5431 TP_ACPI_HKEY_KBD_LIGHT_MASK); 5432 return 0; 5433 } 5434 5435 static void kbdlight_exit(void) 5436 { 5437 if (tp_features.kbdlight) 5438 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5439 } 5440 5441 static int kbdlight_set_level_and_update(int level) 5442 { 5443 int ret; 5444 struct led_classdev *led_cdev; 5445 5446 ret = kbdlight_set_level(level); 5447 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5448 5449 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5450 led_cdev->brightness = level; 5451 5452 return ret; 5453 } 5454 5455 static int kbdlight_read(struct seq_file *m) 5456 { 5457 int level; 5458 5459 if (!tp_features.kbdlight) { 5460 seq_printf(m, "status:\t\tnot supported\n"); 5461 } else { 5462 level = kbdlight_get_level(); 5463 if (level < 0) 5464 seq_printf(m, "status:\t\terror %d\n", level); 5465 else 5466 seq_printf(m, "status:\t\t%d\n", level); 5467 seq_printf(m, "commands:\t0, 1, 2\n"); 5468 } 5469 5470 return 0; 5471 } 5472 5473 static int kbdlight_write(char *buf) 5474 { 5475 char *cmd; 5476 int level = -1; 5477 5478 if (!tp_features.kbdlight) 5479 return -ENODEV; 5480 5481 while ((cmd = next_cmd(&buf))) { 5482 if (strlencmp(cmd, "0") == 0) 5483 level = 0; 5484 else if (strlencmp(cmd, "1") == 0) 5485 level = 1; 5486 else if (strlencmp(cmd, "2") == 0) 5487 level = 2; 5488 else 5489 return -EINVAL; 5490 } 5491 5492 if (level == -1) 5493 return -EINVAL; 5494 5495 return kbdlight_set_level_and_update(level); 5496 } 5497 5498 static void kbdlight_suspend(void) 5499 { 5500 struct led_classdev *led_cdev; 5501 5502 if (!tp_features.kbdlight) 5503 return; 5504 5505 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5506 led_update_brightness(led_cdev); 5507 led_classdev_suspend(led_cdev); 5508 } 5509 5510 static void kbdlight_resume(void) 5511 { 5512 if (!tp_features.kbdlight) 5513 return; 5514 5515 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5516 } 5517 5518 static struct ibm_struct kbdlight_driver_data = { 5519 .name = "kbdlight", 5520 .read = kbdlight_read, 5521 .write = kbdlight_write, 5522 .suspend = kbdlight_suspend, 5523 .resume = kbdlight_resume, 5524 .exit = kbdlight_exit, 5525 }; 5526 5527 /************************************************************************* 5528 * Light (thinklight) subdriver 5529 */ 5530 5531 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5532 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5533 5534 static int light_get_status(void) 5535 { 5536 int status = 0; 5537 5538 if (tp_features.light_status) { 5539 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5540 return -EIO; 5541 return (!!status); 5542 } 5543 5544 return -ENXIO; 5545 } 5546 5547 static int light_set_status(int status) 5548 { 5549 int rc; 5550 5551 if (tp_features.light) { 5552 if (cmos_handle) { 5553 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5554 (status) ? 5555 TP_CMOS_THINKLIGHT_ON : 5556 TP_CMOS_THINKLIGHT_OFF); 5557 } else { 5558 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5559 (status) ? 1 : 0); 5560 } 5561 return (rc) ? 0 : -EIO; 5562 } 5563 5564 return -ENXIO; 5565 } 5566 5567 static int light_sysfs_set(struct led_classdev *led_cdev, 5568 enum led_brightness brightness) 5569 { 5570 return light_set_status((brightness != LED_OFF) ? 5571 TPACPI_LED_ON : TPACPI_LED_OFF); 5572 } 5573 5574 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5575 { 5576 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5577 } 5578 5579 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5580 .led_classdev = { 5581 .name = "tpacpi::thinklight", 5582 .brightness_set_blocking = &light_sysfs_set, 5583 .brightness_get = &light_sysfs_get, 5584 } 5585 }; 5586 5587 static int __init light_init(struct ibm_init_struct *iibm) 5588 { 5589 int rc; 5590 5591 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5592 5593 if (tpacpi_is_ibm()) { 5594 TPACPI_ACPIHANDLE_INIT(ledb); 5595 TPACPI_ACPIHANDLE_INIT(lght); 5596 } 5597 TPACPI_ACPIHANDLE_INIT(cmos); 5598 5599 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5600 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5601 5602 if (tp_features.light) 5603 /* light status not supported on 5604 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5605 tp_features.light_status = 5606 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5607 5608 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5609 str_supported(tp_features.light), 5610 str_supported(tp_features.light_status)); 5611 5612 if (!tp_features.light) 5613 return 1; 5614 5615 rc = led_classdev_register(&tpacpi_pdev->dev, 5616 &tpacpi_led_thinklight.led_classdev); 5617 5618 if (rc < 0) { 5619 tp_features.light = 0; 5620 tp_features.light_status = 0; 5621 } else { 5622 rc = 0; 5623 } 5624 5625 return rc; 5626 } 5627 5628 static void light_exit(void) 5629 { 5630 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5631 } 5632 5633 static int light_read(struct seq_file *m) 5634 { 5635 int status; 5636 5637 if (!tp_features.light) { 5638 seq_printf(m, "status:\t\tnot supported\n"); 5639 } else if (!tp_features.light_status) { 5640 seq_printf(m, "status:\t\tunknown\n"); 5641 seq_printf(m, "commands:\ton, off\n"); 5642 } else { 5643 status = light_get_status(); 5644 if (status < 0) 5645 return status; 5646 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5647 seq_printf(m, "commands:\ton, off\n"); 5648 } 5649 5650 return 0; 5651 } 5652 5653 static int light_write(char *buf) 5654 { 5655 char *cmd; 5656 int newstatus = 0; 5657 5658 if (!tp_features.light) 5659 return -ENODEV; 5660 5661 while ((cmd = next_cmd(&buf))) { 5662 if (strlencmp(cmd, "on") == 0) { 5663 newstatus = 1; 5664 } else if (strlencmp(cmd, "off") == 0) { 5665 newstatus = 0; 5666 } else 5667 return -EINVAL; 5668 } 5669 5670 return light_set_status(newstatus); 5671 } 5672 5673 static struct ibm_struct light_driver_data = { 5674 .name = "light", 5675 .read = light_read, 5676 .write = light_write, 5677 .exit = light_exit, 5678 }; 5679 5680 /************************************************************************* 5681 * CMOS subdriver 5682 */ 5683 5684 /* sysfs cmos_command -------------------------------------------------- */ 5685 static ssize_t cmos_command_store(struct device *dev, 5686 struct device_attribute *attr, 5687 const char *buf, size_t count) 5688 { 5689 unsigned long cmos_cmd; 5690 int res; 5691 5692 if (parse_strtoul(buf, 21, &cmos_cmd)) 5693 return -EINVAL; 5694 5695 res = issue_thinkpad_cmos_command(cmos_cmd); 5696 return (res) ? res : count; 5697 } 5698 5699 static DEVICE_ATTR_WO(cmos_command); 5700 5701 /* --------------------------------------------------------------------- */ 5702 5703 static int __init cmos_init(struct ibm_init_struct *iibm) 5704 { 5705 int res; 5706 5707 vdbg_printk(TPACPI_DBG_INIT, 5708 "initializing cmos commands subdriver\n"); 5709 5710 TPACPI_ACPIHANDLE_INIT(cmos); 5711 5712 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5713 str_supported(cmos_handle != NULL)); 5714 5715 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5716 if (res) 5717 return res; 5718 5719 return (cmos_handle) ? 0 : 1; 5720 } 5721 5722 static void cmos_exit(void) 5723 { 5724 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5725 } 5726 5727 static int cmos_read(struct seq_file *m) 5728 { 5729 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5730 R30, R31, T20-22, X20-21 */ 5731 if (!cmos_handle) 5732 seq_printf(m, "status:\t\tnot supported\n"); 5733 else { 5734 seq_printf(m, "status:\t\tsupported\n"); 5735 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5736 } 5737 5738 return 0; 5739 } 5740 5741 static int cmos_write(char *buf) 5742 { 5743 char *cmd; 5744 int cmos_cmd, res; 5745 5746 while ((cmd = next_cmd(&buf))) { 5747 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5748 cmos_cmd >= 0 && cmos_cmd <= 21) { 5749 /* cmos_cmd set */ 5750 } else 5751 return -EINVAL; 5752 5753 res = issue_thinkpad_cmos_command(cmos_cmd); 5754 if (res) 5755 return res; 5756 } 5757 5758 return 0; 5759 } 5760 5761 static struct ibm_struct cmos_driver_data = { 5762 .name = "cmos", 5763 .read = cmos_read, 5764 .write = cmos_write, 5765 .exit = cmos_exit, 5766 }; 5767 5768 /************************************************************************* 5769 * LED subdriver 5770 */ 5771 5772 enum led_access_mode { 5773 TPACPI_LED_NONE = 0, 5774 TPACPI_LED_570, /* 570 */ 5775 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5776 TPACPI_LED_NEW, /* all others */ 5777 }; 5778 5779 enum { /* For TPACPI_LED_OLD */ 5780 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5781 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5782 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5783 }; 5784 5785 static enum led_access_mode led_supported; 5786 5787 static acpi_handle led_handle; 5788 5789 #define TPACPI_LED_NUMLEDS 16 5790 static struct tpacpi_led_classdev *tpacpi_leds; 5791 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5792 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5793 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5794 "tpacpi::power", 5795 "tpacpi:orange:batt", 5796 "tpacpi:green:batt", 5797 "tpacpi::dock_active", 5798 "tpacpi::bay_active", 5799 "tpacpi::dock_batt", 5800 "tpacpi::unknown_led", 5801 "tpacpi::standby", 5802 "tpacpi::dock_status1", 5803 "tpacpi::dock_status2", 5804 "tpacpi::unknown_led2", 5805 "tpacpi::unknown_led3", 5806 "tpacpi::thinkvantage", 5807 }; 5808 #define TPACPI_SAFE_LEDS 0x1081U 5809 5810 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5811 { 5812 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5813 return false; 5814 #else 5815 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5816 #endif 5817 } 5818 5819 static int led_get_status(const unsigned int led) 5820 { 5821 int status; 5822 enum led_status_t led_s; 5823 5824 switch (led_supported) { 5825 case TPACPI_LED_570: 5826 if (!acpi_evalf(ec_handle, 5827 &status, "GLED", "dd", 1 << led)) 5828 return -EIO; 5829 led_s = (status == 0) ? 5830 TPACPI_LED_OFF : 5831 ((status == 1) ? 5832 TPACPI_LED_ON : 5833 TPACPI_LED_BLINK); 5834 tpacpi_led_state_cache[led] = led_s; 5835 return led_s; 5836 default: 5837 return -ENXIO; 5838 } 5839 5840 /* not reached */ 5841 } 5842 5843 static int led_set_status(const unsigned int led, 5844 const enum led_status_t ledstatus) 5845 { 5846 /* off, on, blink. Index is led_status_t */ 5847 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5848 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5849 5850 int rc = 0; 5851 5852 switch (led_supported) { 5853 case TPACPI_LED_570: 5854 /* 570 */ 5855 if (unlikely(led > 7)) 5856 return -EINVAL; 5857 if (unlikely(tpacpi_is_led_restricted(led))) 5858 return -EPERM; 5859 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5860 (1 << led), led_sled_arg1[ledstatus])) 5861 return -EIO; 5862 break; 5863 case TPACPI_LED_OLD: 5864 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5865 if (unlikely(led > 7)) 5866 return -EINVAL; 5867 if (unlikely(tpacpi_is_led_restricted(led))) 5868 return -EPERM; 5869 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5870 if (rc >= 0) 5871 rc = ec_write(TPACPI_LED_EC_HLBL, 5872 (ledstatus == TPACPI_LED_BLINK) << led); 5873 if (rc >= 0) 5874 rc = ec_write(TPACPI_LED_EC_HLCL, 5875 (ledstatus != TPACPI_LED_OFF) << led); 5876 break; 5877 case TPACPI_LED_NEW: 5878 /* all others */ 5879 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5880 return -EINVAL; 5881 if (unlikely(tpacpi_is_led_restricted(led))) 5882 return -EPERM; 5883 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5884 led, led_led_arg1[ledstatus])) 5885 return -EIO; 5886 break; 5887 default: 5888 return -ENXIO; 5889 } 5890 5891 if (!rc) 5892 tpacpi_led_state_cache[led] = ledstatus; 5893 5894 return rc; 5895 } 5896 5897 static int led_sysfs_set(struct led_classdev *led_cdev, 5898 enum led_brightness brightness) 5899 { 5900 struct tpacpi_led_classdev *data = container_of(led_cdev, 5901 struct tpacpi_led_classdev, led_classdev); 5902 enum led_status_t new_state; 5903 5904 if (brightness == LED_OFF) 5905 new_state = TPACPI_LED_OFF; 5906 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5907 new_state = TPACPI_LED_ON; 5908 else 5909 new_state = TPACPI_LED_BLINK; 5910 5911 return led_set_status(data->led, new_state); 5912 } 5913 5914 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5915 unsigned long *delay_on, unsigned long *delay_off) 5916 { 5917 struct tpacpi_led_classdev *data = container_of(led_cdev, 5918 struct tpacpi_led_classdev, led_classdev); 5919 5920 /* Can we choose the flash rate? */ 5921 if (*delay_on == 0 && *delay_off == 0) { 5922 /* yes. set them to the hardware blink rate (1 Hz) */ 5923 *delay_on = 500; /* ms */ 5924 *delay_off = 500; /* ms */ 5925 } else if ((*delay_on != 500) || (*delay_off != 500)) 5926 return -EINVAL; 5927 5928 return led_set_status(data->led, TPACPI_LED_BLINK); 5929 } 5930 5931 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5932 { 5933 int rc; 5934 5935 struct tpacpi_led_classdev *data = container_of(led_cdev, 5936 struct tpacpi_led_classdev, led_classdev); 5937 5938 rc = led_get_status(data->led); 5939 5940 if (rc == TPACPI_LED_OFF || rc < 0) 5941 rc = LED_OFF; /* no error handling in led class :( */ 5942 else 5943 rc = LED_FULL; 5944 5945 return rc; 5946 } 5947 5948 static void led_exit(void) 5949 { 5950 unsigned int i; 5951 5952 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5953 if (tpacpi_leds[i].led_classdev.name) 5954 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5955 } 5956 5957 kfree(tpacpi_leds); 5958 } 5959 5960 static int __init tpacpi_init_led(unsigned int led) 5961 { 5962 int rc; 5963 5964 tpacpi_leds[led].led = led; 5965 5966 /* LEDs with no name don't get registered */ 5967 if (!tpacpi_led_names[led]) 5968 return 0; 5969 5970 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set; 5971 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5972 if (led_supported == TPACPI_LED_570) 5973 tpacpi_leds[led].led_classdev.brightness_get = 5974 &led_sysfs_get; 5975 5976 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5977 5978 rc = led_classdev_register(&tpacpi_pdev->dev, 5979 &tpacpi_leds[led].led_classdev); 5980 if (rc < 0) 5981 tpacpi_leds[led].led_classdev.name = NULL; 5982 5983 return rc; 5984 } 5985 5986 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5987 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5988 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5989 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5990 5991 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5992 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5993 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5994 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5995 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5996 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5997 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5998 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5999 6000 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 6001 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 6002 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 6003 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 6004 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 6005 6006 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 6007 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 6008 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 6009 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 6010 6011 /* (1) - may have excess leds enabled on MSB */ 6012 6013 /* Defaults (order matters, keep last, don't reorder!) */ 6014 { /* Lenovo */ 6015 .vendor = PCI_VENDOR_ID_LENOVO, 6016 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 6017 .quirks = 0x1fffU, 6018 }, 6019 { /* IBM ThinkPads with no EC version string */ 6020 .vendor = PCI_VENDOR_ID_IBM, 6021 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 6022 .quirks = 0x00ffU, 6023 }, 6024 { /* IBM ThinkPads with EC version string */ 6025 .vendor = PCI_VENDOR_ID_IBM, 6026 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 6027 .quirks = 0x00bfU, 6028 }, 6029 }; 6030 6031 static enum led_access_mode __init led_init_detect_mode(void) 6032 { 6033 acpi_status status; 6034 6035 if (tpacpi_is_ibm()) { 6036 /* 570 */ 6037 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 6038 if (ACPI_SUCCESS(status)) 6039 return TPACPI_LED_570; 6040 6041 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 6042 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 6043 if (ACPI_SUCCESS(status)) 6044 return TPACPI_LED_OLD; 6045 } 6046 6047 /* most others */ 6048 status = acpi_get_handle(ec_handle, "LED", &led_handle); 6049 if (ACPI_SUCCESS(status)) 6050 return TPACPI_LED_NEW; 6051 6052 /* R30, R31, and unknown firmwares */ 6053 led_handle = NULL; 6054 return TPACPI_LED_NONE; 6055 } 6056 6057 static int __init led_init(struct ibm_init_struct *iibm) 6058 { 6059 unsigned int i; 6060 int rc; 6061 unsigned long useful_leds; 6062 6063 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 6064 6065 led_supported = led_init_detect_mode(); 6066 6067 if (led_supported != TPACPI_LED_NONE) { 6068 useful_leds = tpacpi_check_quirks(led_useful_qtable, 6069 ARRAY_SIZE(led_useful_qtable)); 6070 6071 if (!useful_leds) { 6072 led_handle = NULL; 6073 led_supported = TPACPI_LED_NONE; 6074 } 6075 } 6076 6077 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 6078 str_supported(led_supported), led_supported); 6079 6080 if (led_supported == TPACPI_LED_NONE) 6081 return 1; 6082 6083 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds), 6084 GFP_KERNEL); 6085 if (!tpacpi_leds) { 6086 pr_err("Out of memory for LED data\n"); 6087 return -ENOMEM; 6088 } 6089 6090 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 6091 tpacpi_leds[i].led = -1; 6092 6093 if (!tpacpi_is_led_restricted(i) && 6094 test_bit(i, &useful_leds)) { 6095 rc = tpacpi_init_led(i); 6096 if (rc < 0) { 6097 led_exit(); 6098 return rc; 6099 } 6100 } 6101 } 6102 6103 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 6104 pr_notice("warning: userspace override of important firmware LEDs is enabled\n"); 6105 #endif 6106 return 0; 6107 } 6108 6109 #define str_led_status(s) \ 6110 ((s) == TPACPI_LED_OFF ? "off" : \ 6111 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 6112 6113 static int led_read(struct seq_file *m) 6114 { 6115 if (!led_supported) { 6116 seq_printf(m, "status:\t\tnot supported\n"); 6117 return 0; 6118 } 6119 seq_printf(m, "status:\t\tsupported\n"); 6120 6121 if (led_supported == TPACPI_LED_570) { 6122 /* 570 */ 6123 int i, status; 6124 for (i = 0; i < 8; i++) { 6125 status = led_get_status(i); 6126 if (status < 0) 6127 return -EIO; 6128 seq_printf(m, "%d:\t\t%s\n", 6129 i, str_led_status(status)); 6130 } 6131 } 6132 6133 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 6134 6135 return 0; 6136 } 6137 6138 static int led_write(char *buf) 6139 { 6140 char *cmd; 6141 int led, rc; 6142 enum led_status_t s; 6143 6144 if (!led_supported) 6145 return -ENODEV; 6146 6147 while ((cmd = next_cmd(&buf))) { 6148 if (sscanf(cmd, "%d", &led) != 1) 6149 return -EINVAL; 6150 6151 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 6152 tpacpi_leds[led].led < 0) 6153 return -ENODEV; 6154 6155 if (strstr(cmd, "off")) { 6156 s = TPACPI_LED_OFF; 6157 } else if (strstr(cmd, "on")) { 6158 s = TPACPI_LED_ON; 6159 } else if (strstr(cmd, "blink")) { 6160 s = TPACPI_LED_BLINK; 6161 } else { 6162 return -EINVAL; 6163 } 6164 6165 rc = led_set_status(led, s); 6166 if (rc < 0) 6167 return rc; 6168 } 6169 6170 return 0; 6171 } 6172 6173 static struct ibm_struct led_driver_data = { 6174 .name = "led", 6175 .read = led_read, 6176 .write = led_write, 6177 .exit = led_exit, 6178 }; 6179 6180 /************************************************************************* 6181 * Beep subdriver 6182 */ 6183 6184 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 6185 6186 #define TPACPI_BEEP_Q1 0x0001 6187 6188 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 6189 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 6190 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 6191 }; 6192 6193 static int __init beep_init(struct ibm_init_struct *iibm) 6194 { 6195 unsigned long quirks; 6196 6197 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 6198 6199 TPACPI_ACPIHANDLE_INIT(beep); 6200 6201 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 6202 str_supported(beep_handle != NULL)); 6203 6204 quirks = tpacpi_check_quirks(beep_quirk_table, 6205 ARRAY_SIZE(beep_quirk_table)); 6206 6207 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6208 6209 return (beep_handle) ? 0 : 1; 6210 } 6211 6212 static int beep_read(struct seq_file *m) 6213 { 6214 if (!beep_handle) 6215 seq_printf(m, "status:\t\tnot supported\n"); 6216 else { 6217 seq_printf(m, "status:\t\tsupported\n"); 6218 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6219 } 6220 6221 return 0; 6222 } 6223 6224 static int beep_write(char *buf) 6225 { 6226 char *cmd; 6227 int beep_cmd; 6228 6229 if (!beep_handle) 6230 return -ENODEV; 6231 6232 while ((cmd = next_cmd(&buf))) { 6233 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6234 beep_cmd >= 0 && beep_cmd <= 17) { 6235 /* beep_cmd set */ 6236 } else 6237 return -EINVAL; 6238 if (tp_features.beep_needs_two_args) { 6239 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6240 beep_cmd, 0)) 6241 return -EIO; 6242 } else { 6243 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6244 beep_cmd)) 6245 return -EIO; 6246 } 6247 } 6248 6249 return 0; 6250 } 6251 6252 static struct ibm_struct beep_driver_data = { 6253 .name = "beep", 6254 .read = beep_read, 6255 .write = beep_write, 6256 }; 6257 6258 /************************************************************************* 6259 * Thermal subdriver 6260 */ 6261 6262 enum thermal_access_mode { 6263 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6264 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6265 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6266 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6267 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6268 }; 6269 6270 enum { /* TPACPI_THERMAL_TPEC_* */ 6271 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6272 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6273 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6274 6275 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6276 }; 6277 6278 6279 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6280 struct ibm_thermal_sensors_struct { 6281 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6282 }; 6283 6284 static enum thermal_access_mode thermal_read_mode; 6285 6286 /* idx is zero-based */ 6287 static int thermal_get_sensor(int idx, s32 *value) 6288 { 6289 int t; 6290 s8 tmp; 6291 char tmpi[5]; 6292 6293 t = TP_EC_THERMAL_TMP0; 6294 6295 switch (thermal_read_mode) { 6296 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6297 case TPACPI_THERMAL_TPEC_16: 6298 if (idx >= 8 && idx <= 15) { 6299 t = TP_EC_THERMAL_TMP8; 6300 idx -= 8; 6301 } 6302 #endif 6303 /* fallthrough */ 6304 case TPACPI_THERMAL_TPEC_8: 6305 if (idx <= 7) { 6306 if (!acpi_ec_read(t + idx, &tmp)) 6307 return -EIO; 6308 *value = tmp * 1000; 6309 return 0; 6310 } 6311 break; 6312 6313 case TPACPI_THERMAL_ACPI_UPDT: 6314 if (idx <= 7) { 6315 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6316 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6317 return -EIO; 6318 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6319 return -EIO; 6320 *value = (t - 2732) * 100; 6321 return 0; 6322 } 6323 break; 6324 6325 case TPACPI_THERMAL_ACPI_TMP07: 6326 if (idx <= 7) { 6327 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6328 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6329 return -EIO; 6330 if (t > 127 || t < -127) 6331 t = TP_EC_THERMAL_TMP_NA; 6332 *value = t * 1000; 6333 return 0; 6334 } 6335 break; 6336 6337 case TPACPI_THERMAL_NONE: 6338 default: 6339 return -ENOSYS; 6340 } 6341 6342 return -EINVAL; 6343 } 6344 6345 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6346 { 6347 int res, i; 6348 int n; 6349 6350 n = 8; 6351 i = 0; 6352 6353 if (!s) 6354 return -EINVAL; 6355 6356 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6357 n = 16; 6358 6359 for (i = 0 ; i < n; i++) { 6360 res = thermal_get_sensor(i, &s->temp[i]); 6361 if (res) 6362 return res; 6363 } 6364 6365 return n; 6366 } 6367 6368 static void thermal_dump_all_sensors(void) 6369 { 6370 int n, i; 6371 struct ibm_thermal_sensors_struct t; 6372 6373 n = thermal_get_sensors(&t); 6374 if (n <= 0) 6375 return; 6376 6377 pr_notice("temperatures (Celsius):"); 6378 6379 for (i = 0; i < n; i++) { 6380 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6381 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6382 else 6383 pr_cont(" N/A"); 6384 } 6385 6386 pr_cont("\n"); 6387 } 6388 6389 /* sysfs temp##_input -------------------------------------------------- */ 6390 6391 static ssize_t thermal_temp_input_show(struct device *dev, 6392 struct device_attribute *attr, 6393 char *buf) 6394 { 6395 struct sensor_device_attribute *sensor_attr = 6396 to_sensor_dev_attr(attr); 6397 int idx = sensor_attr->index; 6398 s32 value; 6399 int res; 6400 6401 res = thermal_get_sensor(idx, &value); 6402 if (res) 6403 return res; 6404 if (value == TPACPI_THERMAL_SENSOR_NA) 6405 return -ENXIO; 6406 6407 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6408 } 6409 6410 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6411 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6412 thermal_temp_input_show, NULL, _idxB) 6413 6414 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6415 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6416 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6417 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6418 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6419 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6420 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6421 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6422 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6423 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6424 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6425 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6426 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6427 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6428 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6429 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6430 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6431 }; 6432 6433 #define THERMAL_ATTRS(X) \ 6434 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6435 6436 static struct attribute *thermal_temp_input_attr[] = { 6437 THERMAL_ATTRS(8), 6438 THERMAL_ATTRS(9), 6439 THERMAL_ATTRS(10), 6440 THERMAL_ATTRS(11), 6441 THERMAL_ATTRS(12), 6442 THERMAL_ATTRS(13), 6443 THERMAL_ATTRS(14), 6444 THERMAL_ATTRS(15), 6445 THERMAL_ATTRS(0), 6446 THERMAL_ATTRS(1), 6447 THERMAL_ATTRS(2), 6448 THERMAL_ATTRS(3), 6449 THERMAL_ATTRS(4), 6450 THERMAL_ATTRS(5), 6451 THERMAL_ATTRS(6), 6452 THERMAL_ATTRS(7), 6453 NULL 6454 }; 6455 6456 static const struct attribute_group thermal_temp_input16_group = { 6457 .attrs = thermal_temp_input_attr 6458 }; 6459 6460 static const struct attribute_group thermal_temp_input8_group = { 6461 .attrs = &thermal_temp_input_attr[8] 6462 }; 6463 6464 #undef THERMAL_SENSOR_ATTR_TEMP 6465 #undef THERMAL_ATTRS 6466 6467 /* --------------------------------------------------------------------- */ 6468 6469 static int __init thermal_init(struct ibm_init_struct *iibm) 6470 { 6471 u8 t, ta1, ta2; 6472 int i; 6473 int acpi_tmp7; 6474 int res; 6475 6476 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6477 6478 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6479 6480 if (thinkpad_id.ec_model) { 6481 /* 6482 * Direct EC access mode: sensors at registers 6483 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6484 * non-implemented, thermal sensors return 0x80 when 6485 * not available 6486 */ 6487 6488 ta1 = ta2 = 0; 6489 for (i = 0; i < 8; i++) { 6490 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6491 ta1 |= t; 6492 } else { 6493 ta1 = 0; 6494 break; 6495 } 6496 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6497 ta2 |= t; 6498 } else { 6499 ta1 = 0; 6500 break; 6501 } 6502 } 6503 if (ta1 == 0) { 6504 /* This is sheer paranoia, but we handle it anyway */ 6505 if (acpi_tmp7) { 6506 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n"); 6507 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6508 } else { 6509 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n"); 6510 thermal_read_mode = TPACPI_THERMAL_NONE; 6511 } 6512 } else { 6513 thermal_read_mode = 6514 (ta2 != 0) ? 6515 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6516 } 6517 } else if (acpi_tmp7) { 6518 if (tpacpi_is_ibm() && 6519 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6520 /* 600e/x, 770e, 770x */ 6521 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6522 } else { 6523 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6524 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6525 } 6526 } else { 6527 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6528 thermal_read_mode = TPACPI_THERMAL_NONE; 6529 } 6530 6531 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6532 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6533 thermal_read_mode); 6534 6535 switch (thermal_read_mode) { 6536 case TPACPI_THERMAL_TPEC_16: 6537 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6538 &thermal_temp_input16_group); 6539 if (res) 6540 return res; 6541 break; 6542 case TPACPI_THERMAL_TPEC_8: 6543 case TPACPI_THERMAL_ACPI_TMP07: 6544 case TPACPI_THERMAL_ACPI_UPDT: 6545 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6546 &thermal_temp_input8_group); 6547 if (res) 6548 return res; 6549 break; 6550 case TPACPI_THERMAL_NONE: 6551 default: 6552 return 1; 6553 } 6554 6555 return 0; 6556 } 6557 6558 static void thermal_exit(void) 6559 { 6560 switch (thermal_read_mode) { 6561 case TPACPI_THERMAL_TPEC_16: 6562 sysfs_remove_group(&tpacpi_hwmon->kobj, 6563 &thermal_temp_input16_group); 6564 break; 6565 case TPACPI_THERMAL_TPEC_8: 6566 case TPACPI_THERMAL_ACPI_TMP07: 6567 case TPACPI_THERMAL_ACPI_UPDT: 6568 sysfs_remove_group(&tpacpi_hwmon->kobj, 6569 &thermal_temp_input8_group); 6570 break; 6571 case TPACPI_THERMAL_NONE: 6572 default: 6573 break; 6574 } 6575 } 6576 6577 static int thermal_read(struct seq_file *m) 6578 { 6579 int n, i; 6580 struct ibm_thermal_sensors_struct t; 6581 6582 n = thermal_get_sensors(&t); 6583 if (unlikely(n < 0)) 6584 return n; 6585 6586 seq_printf(m, "temperatures:\t"); 6587 6588 if (n > 0) { 6589 for (i = 0; i < (n - 1); i++) 6590 seq_printf(m, "%d ", t.temp[i] / 1000); 6591 seq_printf(m, "%d\n", t.temp[i] / 1000); 6592 } else 6593 seq_printf(m, "not supported\n"); 6594 6595 return 0; 6596 } 6597 6598 static struct ibm_struct thermal_driver_data = { 6599 .name = "thermal", 6600 .read = thermal_read, 6601 .exit = thermal_exit, 6602 }; 6603 6604 /************************************************************************* 6605 * Backlight/brightness subdriver 6606 */ 6607 6608 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6609 6610 /* 6611 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6612 * CMOS NVRAM byte 0x5E, bits 0-3. 6613 * 6614 * EC HBRV (0x31) has the following layout 6615 * Bit 7: unknown function 6616 * Bit 6: unknown function 6617 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6618 * Bit 4: must be set to zero to avoid problems 6619 * Bit 3-0: backlight brightness level 6620 * 6621 * brightness_get_raw returns status data in the HBRV layout 6622 * 6623 * WARNING: The X61 has been verified to use HBRV for something else, so 6624 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6625 * testing on the very early *60 Lenovo models... 6626 */ 6627 6628 enum { 6629 TP_EC_BACKLIGHT = 0x31, 6630 6631 /* TP_EC_BACKLIGHT bitmasks */ 6632 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6633 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6634 TP_EC_BACKLIGHT_MAPSW = 0x20, 6635 }; 6636 6637 enum tpacpi_brightness_access_mode { 6638 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6639 TPACPI_BRGHT_MODE_EC, /* EC control */ 6640 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6641 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6642 TPACPI_BRGHT_MODE_MAX 6643 }; 6644 6645 static struct backlight_device *ibm_backlight_device; 6646 6647 static enum tpacpi_brightness_access_mode brightness_mode = 6648 TPACPI_BRGHT_MODE_MAX; 6649 6650 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6651 6652 static struct mutex brightness_mutex; 6653 6654 /* NVRAM brightness access, 6655 * call with brightness_mutex held! */ 6656 static unsigned int tpacpi_brightness_nvram_get(void) 6657 { 6658 u8 lnvram; 6659 6660 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6661 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6662 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6663 lnvram &= bright_maxlvl; 6664 6665 return lnvram; 6666 } 6667 6668 static void tpacpi_brightness_checkpoint_nvram(void) 6669 { 6670 u8 lec = 0; 6671 u8 b_nvram; 6672 6673 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6674 return; 6675 6676 vdbg_printk(TPACPI_DBG_BRGHT, 6677 "trying to checkpoint backlight level to NVRAM...\n"); 6678 6679 if (mutex_lock_killable(&brightness_mutex) < 0) 6680 return; 6681 6682 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6683 goto unlock; 6684 lec &= TP_EC_BACKLIGHT_LVLMSK; 6685 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6686 6687 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6688 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6689 /* NVRAM needs update */ 6690 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6691 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6692 b_nvram |= lec; 6693 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6694 dbg_printk(TPACPI_DBG_BRGHT, 6695 "updated NVRAM backlight level to %u (0x%02x)\n", 6696 (unsigned int) lec, (unsigned int) b_nvram); 6697 } else 6698 vdbg_printk(TPACPI_DBG_BRGHT, 6699 "NVRAM backlight level already is %u (0x%02x)\n", 6700 (unsigned int) lec, (unsigned int) b_nvram); 6701 6702 unlock: 6703 mutex_unlock(&brightness_mutex); 6704 } 6705 6706 6707 /* call with brightness_mutex held! */ 6708 static int tpacpi_brightness_get_raw(int *status) 6709 { 6710 u8 lec = 0; 6711 6712 switch (brightness_mode) { 6713 case TPACPI_BRGHT_MODE_UCMS_STEP: 6714 *status = tpacpi_brightness_nvram_get(); 6715 return 0; 6716 case TPACPI_BRGHT_MODE_EC: 6717 case TPACPI_BRGHT_MODE_ECNVRAM: 6718 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6719 return -EIO; 6720 *status = lec; 6721 return 0; 6722 default: 6723 return -ENXIO; 6724 } 6725 } 6726 6727 /* call with brightness_mutex held! */ 6728 /* do NOT call with illegal backlight level value */ 6729 static int tpacpi_brightness_set_ec(unsigned int value) 6730 { 6731 u8 lec = 0; 6732 6733 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6734 return -EIO; 6735 6736 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6737 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6738 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6739 return -EIO; 6740 6741 return 0; 6742 } 6743 6744 /* call with brightness_mutex held! */ 6745 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6746 { 6747 int cmos_cmd, inc; 6748 unsigned int current_value, i; 6749 6750 current_value = tpacpi_brightness_nvram_get(); 6751 6752 if (value == current_value) 6753 return 0; 6754 6755 cmos_cmd = (value > current_value) ? 6756 TP_CMOS_BRIGHTNESS_UP : 6757 TP_CMOS_BRIGHTNESS_DOWN; 6758 inc = (value > current_value) ? 1 : -1; 6759 6760 for (i = current_value; i != value; i += inc) 6761 if (issue_thinkpad_cmos_command(cmos_cmd)) 6762 return -EIO; 6763 6764 return 0; 6765 } 6766 6767 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6768 static int brightness_set(unsigned int value) 6769 { 6770 int res; 6771 6772 if (value > bright_maxlvl) 6773 return -EINVAL; 6774 6775 vdbg_printk(TPACPI_DBG_BRGHT, 6776 "set backlight level to %d\n", value); 6777 6778 res = mutex_lock_killable(&brightness_mutex); 6779 if (res < 0) 6780 return res; 6781 6782 switch (brightness_mode) { 6783 case TPACPI_BRGHT_MODE_EC: 6784 case TPACPI_BRGHT_MODE_ECNVRAM: 6785 res = tpacpi_brightness_set_ec(value); 6786 break; 6787 case TPACPI_BRGHT_MODE_UCMS_STEP: 6788 res = tpacpi_brightness_set_ucmsstep(value); 6789 break; 6790 default: 6791 res = -ENXIO; 6792 } 6793 6794 mutex_unlock(&brightness_mutex); 6795 return res; 6796 } 6797 6798 /* sysfs backlight class ----------------------------------------------- */ 6799 6800 static int brightness_update_status(struct backlight_device *bd) 6801 { 6802 unsigned int level = 6803 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6804 bd->props.power == FB_BLANK_UNBLANK) ? 6805 bd->props.brightness : 0; 6806 6807 dbg_printk(TPACPI_DBG_BRGHT, 6808 "backlight: attempt to set level to %d\n", 6809 level); 6810 6811 /* it is the backlight class's job (caller) to handle 6812 * EINTR and other errors properly */ 6813 return brightness_set(level); 6814 } 6815 6816 static int brightness_get(struct backlight_device *bd) 6817 { 6818 int status, res; 6819 6820 res = mutex_lock_killable(&brightness_mutex); 6821 if (res < 0) 6822 return 0; 6823 6824 res = tpacpi_brightness_get_raw(&status); 6825 6826 mutex_unlock(&brightness_mutex); 6827 6828 if (res < 0) 6829 return 0; 6830 6831 return status & TP_EC_BACKLIGHT_LVLMSK; 6832 } 6833 6834 static void tpacpi_brightness_notify_change(void) 6835 { 6836 backlight_force_update(ibm_backlight_device, 6837 BACKLIGHT_UPDATE_HOTKEY); 6838 } 6839 6840 static const struct backlight_ops ibm_backlight_data = { 6841 .get_brightness = brightness_get, 6842 .update_status = brightness_update_status, 6843 }; 6844 6845 /* --------------------------------------------------------------------- */ 6846 6847 /* 6848 * Call _BCL method of video device. On some ThinkPads this will 6849 * switch the firmware to the ACPI brightness control mode. 6850 */ 6851 6852 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6853 { 6854 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6855 union acpi_object *obj; 6856 struct acpi_device *device, *child; 6857 int rc; 6858 6859 if (acpi_bus_get_device(handle, &device)) 6860 return 0; 6861 6862 rc = 0; 6863 list_for_each_entry(child, &device->children, node) { 6864 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6865 NULL, &buffer); 6866 if (ACPI_FAILURE(status)) 6867 continue; 6868 6869 obj = (union acpi_object *)buffer.pointer; 6870 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6871 pr_err("Unknown _BCL data, please report this to %s\n", 6872 TPACPI_MAIL); 6873 rc = 0; 6874 } else { 6875 rc = obj->package.count; 6876 } 6877 break; 6878 } 6879 6880 kfree(buffer.pointer); 6881 return rc; 6882 } 6883 6884 6885 /* 6886 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6887 */ 6888 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6889 { 6890 acpi_handle video_device; 6891 int bcl_levels = 0; 6892 6893 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6894 if (video_device) 6895 bcl_levels = tpacpi_query_bcl_levels(video_device); 6896 6897 tp_features.bright_acpimode = (bcl_levels > 0); 6898 6899 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6900 } 6901 6902 /* 6903 * These are only useful for models that have only one possibility 6904 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6905 * these quirks. 6906 */ 6907 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6908 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6909 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6910 6911 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6912 /* Models with ATI GPUs known to require ECNVRAM mode */ 6913 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6914 6915 /* Models with ATI GPUs that can use ECNVRAM */ 6916 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6917 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6918 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6919 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6920 6921 /* Models with Intel Extreme Graphics 2 */ 6922 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6923 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6924 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6925 6926 /* Models with Intel GMA900 */ 6927 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6928 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6929 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6930 }; 6931 6932 /* 6933 * Returns < 0 for error, otherwise sets tp_features.bright_* 6934 * and bright_maxlvl. 6935 */ 6936 static void __init tpacpi_detect_brightness_capabilities(void) 6937 { 6938 unsigned int b; 6939 6940 vdbg_printk(TPACPI_DBG_INIT, 6941 "detecting firmware brightness interface capabilities\n"); 6942 6943 /* we could run a quirks check here (same table used by 6944 * brightness_init) if needed */ 6945 6946 /* 6947 * We always attempt to detect acpi support, so as to switch 6948 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6949 * going to publish a backlight interface 6950 */ 6951 b = tpacpi_check_std_acpi_brightness_support(); 6952 switch (b) { 6953 case 16: 6954 bright_maxlvl = 15; 6955 break; 6956 case 8: 6957 case 0: 6958 bright_maxlvl = 7; 6959 break; 6960 default: 6961 tp_features.bright_unkfw = 1; 6962 bright_maxlvl = b - 1; 6963 } 6964 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6965 } 6966 6967 static int __init brightness_init(struct ibm_init_struct *iibm) 6968 { 6969 struct backlight_properties props; 6970 int b; 6971 unsigned long quirks; 6972 6973 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6974 6975 mutex_init(&brightness_mutex); 6976 6977 quirks = tpacpi_check_quirks(brightness_quirk_table, 6978 ARRAY_SIZE(brightness_quirk_table)); 6979 6980 /* tpacpi_detect_brightness_capabilities() must have run already */ 6981 6982 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6983 if (tp_features.bright_unkfw) 6984 return 1; 6985 6986 if (!brightness_enable) { 6987 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6988 "brightness support disabled by module parameter\n"); 6989 return 1; 6990 } 6991 6992 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6993 if (brightness_enable > 1) { 6994 pr_info("Standard ACPI backlight interface available, not loading native one\n"); 6995 return 1; 6996 } else if (brightness_enable == 1) { 6997 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n"); 6998 return 1; 6999 } 7000 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 7001 pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n"); 7002 } 7003 7004 /* 7005 * Check for module parameter bogosity, note that we 7006 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 7007 * able to detect "unspecified" 7008 */ 7009 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 7010 return -EINVAL; 7011 7012 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 7013 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 7014 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 7015 if (quirks & TPACPI_BRGHT_Q_EC) 7016 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 7017 else 7018 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 7019 7020 dbg_printk(TPACPI_DBG_BRGHT, 7021 "driver auto-selected brightness_mode=%d\n", 7022 brightness_mode); 7023 } 7024 7025 /* Safety */ 7026 if (!tpacpi_is_ibm() && 7027 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 7028 brightness_mode == TPACPI_BRGHT_MODE_EC)) 7029 return -EINVAL; 7030 7031 if (tpacpi_brightness_get_raw(&b) < 0) 7032 return 1; 7033 7034 memset(&props, 0, sizeof(struct backlight_properties)); 7035 props.type = BACKLIGHT_PLATFORM; 7036 props.max_brightness = bright_maxlvl; 7037 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 7038 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 7039 NULL, NULL, 7040 &ibm_backlight_data, 7041 &props); 7042 if (IS_ERR(ibm_backlight_device)) { 7043 int rc = PTR_ERR(ibm_backlight_device); 7044 ibm_backlight_device = NULL; 7045 pr_err("Could not register backlight device\n"); 7046 return rc; 7047 } 7048 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7049 "brightness is supported\n"); 7050 7051 if (quirks & TPACPI_BRGHT_Q_ASK) { 7052 pr_notice("brightness: will use unverified default: brightness_mode=%d\n", 7053 brightness_mode); 7054 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n", 7055 TPACPI_MAIL); 7056 } 7057 7058 /* Added by mistake in early 2007. Probably useless, but it could 7059 * be working around some unknown firmware problem where the value 7060 * read at startup doesn't match the real hardware state... so leave 7061 * it in place just in case */ 7062 backlight_update_status(ibm_backlight_device); 7063 7064 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7065 "brightness: registering brightness hotkeys as change notification\n"); 7066 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7067 | TP_ACPI_HKEY_BRGHTUP_MASK 7068 | TP_ACPI_HKEY_BRGHTDWN_MASK); 7069 return 0; 7070 } 7071 7072 static void brightness_suspend(void) 7073 { 7074 tpacpi_brightness_checkpoint_nvram(); 7075 } 7076 7077 static void brightness_shutdown(void) 7078 { 7079 tpacpi_brightness_checkpoint_nvram(); 7080 } 7081 7082 static void brightness_exit(void) 7083 { 7084 if (ibm_backlight_device) { 7085 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 7086 "calling backlight_device_unregister()\n"); 7087 backlight_device_unregister(ibm_backlight_device); 7088 } 7089 7090 tpacpi_brightness_checkpoint_nvram(); 7091 } 7092 7093 static int brightness_read(struct seq_file *m) 7094 { 7095 int level; 7096 7097 level = brightness_get(NULL); 7098 if (level < 0) { 7099 seq_printf(m, "level:\t\tunreadable\n"); 7100 } else { 7101 seq_printf(m, "level:\t\t%d\n", level); 7102 seq_printf(m, "commands:\tup, down\n"); 7103 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7104 bright_maxlvl); 7105 } 7106 7107 return 0; 7108 } 7109 7110 static int brightness_write(char *buf) 7111 { 7112 int level; 7113 int rc; 7114 char *cmd; 7115 7116 level = brightness_get(NULL); 7117 if (level < 0) 7118 return level; 7119 7120 while ((cmd = next_cmd(&buf))) { 7121 if (strlencmp(cmd, "up") == 0) { 7122 if (level < bright_maxlvl) 7123 level++; 7124 } else if (strlencmp(cmd, "down") == 0) { 7125 if (level > 0) 7126 level--; 7127 } else if (sscanf(cmd, "level %d", &level) == 1 && 7128 level >= 0 && level <= bright_maxlvl) { 7129 /* new level set */ 7130 } else 7131 return -EINVAL; 7132 } 7133 7134 tpacpi_disclose_usertask("procfs brightness", 7135 "set level to %d\n", level); 7136 7137 /* 7138 * Now we know what the final level should be, so we try to set it. 7139 * Doing it this way makes the syscall restartable in case of EINTR 7140 */ 7141 rc = brightness_set(level); 7142 if (!rc && ibm_backlight_device) 7143 backlight_force_update(ibm_backlight_device, 7144 BACKLIGHT_UPDATE_SYSFS); 7145 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7146 } 7147 7148 static struct ibm_struct brightness_driver_data = { 7149 .name = "brightness", 7150 .read = brightness_read, 7151 .write = brightness_write, 7152 .exit = brightness_exit, 7153 .suspend = brightness_suspend, 7154 .shutdown = brightness_shutdown, 7155 }; 7156 7157 /************************************************************************* 7158 * Volume subdriver 7159 */ 7160 7161 /* 7162 * IBM ThinkPads have a simple volume controller with MUTE gating. 7163 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 7164 * 7165 * Since the *61 series (and probably also the later *60 series), Lenovo 7166 * ThinkPads only implement the MUTE gate. 7167 * 7168 * EC register 0x30 7169 * Bit 6: MUTE (1 mutes sound) 7170 * Bit 3-0: Volume 7171 * Other bits should be zero as far as we know. 7172 * 7173 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 7174 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 7175 * such as bit 7 which is used to detect repeated presses of MUTE, 7176 * and we leave them unchanged. 7177 * 7178 * On newer Lenovo ThinkPads, the EC can automatically change the volume 7179 * in response to user input. Unfortunately, this rarely works well. 7180 * The laptop changes the state of its internal MUTE gate and, on some 7181 * models, sends KEY_MUTE, causing any user code that responds to the 7182 * mute button to get confused. The hardware MUTE gate is also 7183 * unnecessary, since user code can handle the mute button without 7184 * kernel or EC help. 7185 * 7186 * To avoid confusing userspace, we simply disable all EC-based mute 7187 * and volume controls when possible. 7188 */ 7189 7190 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 7191 7192 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 7193 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 7194 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7195 7196 #if SNDRV_CARDS <= 32 7197 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7198 #else 7199 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7200 #endif 7201 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7202 static char *alsa_id = "ThinkPadEC"; 7203 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7204 7205 struct tpacpi_alsa_data { 7206 struct snd_card *card; 7207 struct snd_ctl_elem_id *ctl_mute_id; 7208 struct snd_ctl_elem_id *ctl_vol_id; 7209 }; 7210 7211 static struct snd_card *alsa_card; 7212 7213 enum { 7214 TP_EC_AUDIO = 0x30, 7215 7216 /* TP_EC_AUDIO bits */ 7217 TP_EC_AUDIO_MUTESW = 6, 7218 7219 /* TP_EC_AUDIO bitmasks */ 7220 TP_EC_AUDIO_LVL_MSK = 0x0F, 7221 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7222 7223 /* Maximum volume */ 7224 TP_EC_VOLUME_MAX = 14, 7225 }; 7226 7227 enum tpacpi_volume_access_mode { 7228 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7229 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7230 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7231 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7232 TPACPI_VOL_MODE_MAX 7233 }; 7234 7235 enum tpacpi_volume_capabilities { 7236 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7237 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7238 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7239 TPACPI_VOL_CAP_MAX 7240 }; 7241 7242 enum tpacpi_mute_btn_mode { 7243 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7244 /* We don't know what mode 1 is. */ 7245 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7246 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7247 }; 7248 7249 static enum tpacpi_volume_access_mode volume_mode = 7250 TPACPI_VOL_MODE_MAX; 7251 7252 static enum tpacpi_volume_capabilities volume_capabilities; 7253 static bool volume_control_allowed; 7254 static bool software_mute_requested = true; 7255 static bool software_mute_active; 7256 static int software_mute_orig_mode; 7257 7258 /* 7259 * Used to syncronize writers to TP_EC_AUDIO and 7260 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7261 */ 7262 static struct mutex volume_mutex; 7263 7264 static void tpacpi_volume_checkpoint_nvram(void) 7265 { 7266 u8 lec = 0; 7267 u8 b_nvram; 7268 u8 ec_mask; 7269 7270 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7271 return; 7272 if (!volume_control_allowed) 7273 return; 7274 if (software_mute_active) 7275 return; 7276 7277 vdbg_printk(TPACPI_DBG_MIXER, 7278 "trying to checkpoint mixer state to NVRAM...\n"); 7279 7280 if (tp_features.mixer_no_level_control) 7281 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7282 else 7283 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7284 7285 if (mutex_lock_killable(&volume_mutex) < 0) 7286 return; 7287 7288 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7289 goto unlock; 7290 lec &= ec_mask; 7291 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7292 7293 if (lec != (b_nvram & ec_mask)) { 7294 /* NVRAM needs update */ 7295 b_nvram &= ~ec_mask; 7296 b_nvram |= lec; 7297 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7298 dbg_printk(TPACPI_DBG_MIXER, 7299 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7300 (unsigned int) lec, (unsigned int) b_nvram); 7301 } else { 7302 vdbg_printk(TPACPI_DBG_MIXER, 7303 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7304 (unsigned int) lec, (unsigned int) b_nvram); 7305 } 7306 7307 unlock: 7308 mutex_unlock(&volume_mutex); 7309 } 7310 7311 static int volume_get_status_ec(u8 *status) 7312 { 7313 u8 s; 7314 7315 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7316 return -EIO; 7317 7318 *status = s; 7319 7320 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7321 7322 return 0; 7323 } 7324 7325 static int volume_get_status(u8 *status) 7326 { 7327 return volume_get_status_ec(status); 7328 } 7329 7330 static int volume_set_status_ec(const u8 status) 7331 { 7332 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7333 return -EIO; 7334 7335 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7336 7337 /* 7338 * On X200s, and possibly on others, it can take a while for 7339 * reads to become correct. 7340 */ 7341 msleep(1); 7342 7343 return 0; 7344 } 7345 7346 static int volume_set_status(const u8 status) 7347 { 7348 return volume_set_status_ec(status); 7349 } 7350 7351 /* returns < 0 on error, 0 on no change, 1 on change */ 7352 static int __volume_set_mute_ec(const bool mute) 7353 { 7354 int rc; 7355 u8 s, n; 7356 7357 if (mutex_lock_killable(&volume_mutex) < 0) 7358 return -EINTR; 7359 7360 rc = volume_get_status_ec(&s); 7361 if (rc) 7362 goto unlock; 7363 7364 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7365 s & ~TP_EC_AUDIO_MUTESW_MSK; 7366 7367 if (n != s) { 7368 rc = volume_set_status_ec(n); 7369 if (!rc) 7370 rc = 1; 7371 } 7372 7373 unlock: 7374 mutex_unlock(&volume_mutex); 7375 return rc; 7376 } 7377 7378 static int volume_alsa_set_mute(const bool mute) 7379 { 7380 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7381 (mute) ? "" : "un"); 7382 return __volume_set_mute_ec(mute); 7383 } 7384 7385 static int volume_set_mute(const bool mute) 7386 { 7387 int rc; 7388 7389 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7390 (mute) ? "" : "un"); 7391 7392 rc = __volume_set_mute_ec(mute); 7393 return (rc < 0) ? rc : 0; 7394 } 7395 7396 /* returns < 0 on error, 0 on no change, 1 on change */ 7397 static int __volume_set_volume_ec(const u8 vol) 7398 { 7399 int rc; 7400 u8 s, n; 7401 7402 if (vol > TP_EC_VOLUME_MAX) 7403 return -EINVAL; 7404 7405 if (mutex_lock_killable(&volume_mutex) < 0) 7406 return -EINTR; 7407 7408 rc = volume_get_status_ec(&s); 7409 if (rc) 7410 goto unlock; 7411 7412 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7413 7414 if (n != s) { 7415 rc = volume_set_status_ec(n); 7416 if (!rc) 7417 rc = 1; 7418 } 7419 7420 unlock: 7421 mutex_unlock(&volume_mutex); 7422 return rc; 7423 } 7424 7425 static int volume_set_software_mute(bool startup) 7426 { 7427 int result; 7428 7429 if (!tpacpi_is_lenovo()) 7430 return -ENODEV; 7431 7432 if (startup) { 7433 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7434 "HAUM", "qd")) 7435 return -EIO; 7436 7437 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7438 "Initial HAUM setting was %d\n", 7439 software_mute_orig_mode); 7440 } 7441 7442 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7443 (int)TP_EC_MUTE_BTN_NONE)) 7444 return -EIO; 7445 7446 if (result != TP_EC_MUTE_BTN_NONE) 7447 pr_warn("Unexpected SAUM result %d\n", 7448 result); 7449 7450 /* 7451 * In software mute mode, the standard codec controls take 7452 * precendence, so we unmute the ThinkPad HW switch at 7453 * startup. Just on case there are SAUM-capable ThinkPads 7454 * with level controls, set max HW volume as well. 7455 */ 7456 if (tp_features.mixer_no_level_control) 7457 result = volume_set_mute(false); 7458 else 7459 result = volume_set_status(TP_EC_VOLUME_MAX); 7460 7461 if (result != 0) 7462 pr_warn("Failed to unmute the HW mute switch\n"); 7463 7464 return 0; 7465 } 7466 7467 static void volume_exit_software_mute(void) 7468 { 7469 int r; 7470 7471 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7472 || r != software_mute_orig_mode) 7473 pr_warn("Failed to restore mute mode\n"); 7474 } 7475 7476 static int volume_alsa_set_volume(const u8 vol) 7477 { 7478 dbg_printk(TPACPI_DBG_MIXER, 7479 "ALSA: trying to set volume level to %hu\n", vol); 7480 return __volume_set_volume_ec(vol); 7481 } 7482 7483 static void volume_alsa_notify_change(void) 7484 { 7485 struct tpacpi_alsa_data *d; 7486 7487 if (alsa_card && alsa_card->private_data) { 7488 d = alsa_card->private_data; 7489 if (d->ctl_mute_id) 7490 snd_ctl_notify(alsa_card, 7491 SNDRV_CTL_EVENT_MASK_VALUE, 7492 d->ctl_mute_id); 7493 if (d->ctl_vol_id) 7494 snd_ctl_notify(alsa_card, 7495 SNDRV_CTL_EVENT_MASK_VALUE, 7496 d->ctl_vol_id); 7497 } 7498 } 7499 7500 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7501 struct snd_ctl_elem_info *uinfo) 7502 { 7503 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7504 uinfo->count = 1; 7505 uinfo->value.integer.min = 0; 7506 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7507 return 0; 7508 } 7509 7510 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7511 struct snd_ctl_elem_value *ucontrol) 7512 { 7513 u8 s; 7514 int rc; 7515 7516 rc = volume_get_status(&s); 7517 if (rc < 0) 7518 return rc; 7519 7520 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7521 return 0; 7522 } 7523 7524 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7525 struct snd_ctl_elem_value *ucontrol) 7526 { 7527 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7528 ucontrol->value.integer.value[0]); 7529 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7530 } 7531 7532 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7533 7534 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7535 struct snd_ctl_elem_value *ucontrol) 7536 { 7537 u8 s; 7538 int rc; 7539 7540 rc = volume_get_status(&s); 7541 if (rc < 0) 7542 return rc; 7543 7544 ucontrol->value.integer.value[0] = 7545 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7546 return 0; 7547 } 7548 7549 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7550 struct snd_ctl_elem_value *ucontrol) 7551 { 7552 tpacpi_disclose_usertask("ALSA", "%smute\n", 7553 ucontrol->value.integer.value[0] ? 7554 "un" : ""); 7555 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7556 } 7557 7558 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7559 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7560 .name = "Console Playback Volume", 7561 .index = 0, 7562 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7563 .info = volume_alsa_vol_info, 7564 .get = volume_alsa_vol_get, 7565 }; 7566 7567 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7568 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7569 .name = "Console Playback Switch", 7570 .index = 0, 7571 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7572 .info = volume_alsa_mute_info, 7573 .get = volume_alsa_mute_get, 7574 }; 7575 7576 static void volume_suspend(void) 7577 { 7578 tpacpi_volume_checkpoint_nvram(); 7579 } 7580 7581 static void volume_resume(void) 7582 { 7583 if (software_mute_active) { 7584 if (volume_set_software_mute(false) < 0) 7585 pr_warn("Failed to restore software mute\n"); 7586 } else { 7587 volume_alsa_notify_change(); 7588 } 7589 } 7590 7591 static void volume_shutdown(void) 7592 { 7593 tpacpi_volume_checkpoint_nvram(); 7594 } 7595 7596 static void volume_exit(void) 7597 { 7598 if (alsa_card) { 7599 snd_card_free(alsa_card); 7600 alsa_card = NULL; 7601 } 7602 7603 tpacpi_volume_checkpoint_nvram(); 7604 7605 if (software_mute_active) 7606 volume_exit_software_mute(); 7607 } 7608 7609 static int __init volume_create_alsa_mixer(void) 7610 { 7611 struct snd_card *card; 7612 struct tpacpi_alsa_data *data; 7613 struct snd_kcontrol *ctl_vol; 7614 struct snd_kcontrol *ctl_mute; 7615 int rc; 7616 7617 rc = snd_card_new(&tpacpi_pdev->dev, 7618 alsa_index, alsa_id, THIS_MODULE, 7619 sizeof(struct tpacpi_alsa_data), &card); 7620 if (rc < 0 || !card) { 7621 pr_err("Failed to create ALSA card structures: %d\n", rc); 7622 return 1; 7623 } 7624 7625 BUG_ON(!card->private_data); 7626 data = card->private_data; 7627 data->card = card; 7628 7629 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7630 sizeof(card->driver)); 7631 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7632 sizeof(card->shortname)); 7633 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7634 (thinkpad_id.ec_version_str) ? 7635 thinkpad_id.ec_version_str : "(unknown)"); 7636 snprintf(card->longname, sizeof(card->longname), 7637 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7638 (thinkpad_id.ec_version_str) ? 7639 thinkpad_id.ec_version_str : "unknown"); 7640 7641 if (volume_control_allowed) { 7642 volume_alsa_control_vol.put = volume_alsa_vol_put; 7643 volume_alsa_control_vol.access = 7644 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7645 7646 volume_alsa_control_mute.put = volume_alsa_mute_put; 7647 volume_alsa_control_mute.access = 7648 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7649 } 7650 7651 if (!tp_features.mixer_no_level_control) { 7652 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7653 rc = snd_ctl_add(card, ctl_vol); 7654 if (rc < 0) { 7655 pr_err("Failed to create ALSA volume control: %d\n", 7656 rc); 7657 goto err_exit; 7658 } 7659 data->ctl_vol_id = &ctl_vol->id; 7660 } 7661 7662 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7663 rc = snd_ctl_add(card, ctl_mute); 7664 if (rc < 0) { 7665 pr_err("Failed to create ALSA mute control: %d\n", rc); 7666 goto err_exit; 7667 } 7668 data->ctl_mute_id = &ctl_mute->id; 7669 7670 rc = snd_card_register(card); 7671 if (rc < 0) { 7672 pr_err("Failed to register ALSA card: %d\n", rc); 7673 goto err_exit; 7674 } 7675 7676 alsa_card = card; 7677 return 0; 7678 7679 err_exit: 7680 snd_card_free(card); 7681 return 1; 7682 } 7683 7684 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7685 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7686 7687 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7688 /* Whitelist volume level on all IBM by default */ 7689 { .vendor = PCI_VENDOR_ID_IBM, 7690 .bios = TPACPI_MATCH_ANY, 7691 .ec = TPACPI_MATCH_ANY, 7692 .quirks = TPACPI_VOL_Q_LEVEL }, 7693 7694 /* Lenovo models with volume control (needs confirmation) */ 7695 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7696 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7697 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7698 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7699 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7700 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7701 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7702 7703 /* Whitelist mute-only on all Lenovo by default */ 7704 { .vendor = PCI_VENDOR_ID_LENOVO, 7705 .bios = TPACPI_MATCH_ANY, 7706 .ec = TPACPI_MATCH_ANY, 7707 .quirks = TPACPI_VOL_Q_MUTEONLY } 7708 }; 7709 7710 static int __init volume_init(struct ibm_init_struct *iibm) 7711 { 7712 unsigned long quirks; 7713 int rc; 7714 7715 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7716 7717 mutex_init(&volume_mutex); 7718 7719 /* 7720 * Check for module parameter bogosity, note that we 7721 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7722 * able to detect "unspecified" 7723 */ 7724 if (volume_mode > TPACPI_VOL_MODE_MAX) 7725 return -EINVAL; 7726 7727 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7728 pr_err("UCMS step volume mode not implemented, please contact %s\n", 7729 TPACPI_MAIL); 7730 return 1; 7731 } 7732 7733 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7734 return -EINVAL; 7735 7736 /* 7737 * The ALSA mixer is our primary interface. 7738 * When disabled, don't install the subdriver at all 7739 */ 7740 if (!alsa_enable) { 7741 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7742 "ALSA mixer disabled by parameter, not loading volume subdriver...\n"); 7743 return 1; 7744 } 7745 7746 quirks = tpacpi_check_quirks(volume_quirk_table, 7747 ARRAY_SIZE(volume_quirk_table)); 7748 7749 switch (volume_capabilities) { 7750 case TPACPI_VOL_CAP_AUTO: 7751 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7752 tp_features.mixer_no_level_control = 1; 7753 else if (quirks & TPACPI_VOL_Q_LEVEL) 7754 tp_features.mixer_no_level_control = 0; 7755 else 7756 return 1; /* no mixer */ 7757 break; 7758 case TPACPI_VOL_CAP_VOLMUTE: 7759 tp_features.mixer_no_level_control = 0; 7760 break; 7761 case TPACPI_VOL_CAP_MUTEONLY: 7762 tp_features.mixer_no_level_control = 1; 7763 break; 7764 default: 7765 return 1; 7766 } 7767 7768 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7769 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7770 "using user-supplied volume_capabilities=%d\n", 7771 volume_capabilities); 7772 7773 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7774 volume_mode == TPACPI_VOL_MODE_MAX) { 7775 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7776 7777 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7778 "driver auto-selected volume_mode=%d\n", 7779 volume_mode); 7780 } else { 7781 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7782 "using user-supplied volume_mode=%d\n", 7783 volume_mode); 7784 } 7785 7786 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7787 "mute is supported, volume control is %s\n", 7788 str_supported(!tp_features.mixer_no_level_control)); 7789 7790 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7791 software_mute_active = true; 7792 } else { 7793 rc = volume_create_alsa_mixer(); 7794 if (rc) { 7795 pr_err("Could not create the ALSA mixer interface\n"); 7796 return rc; 7797 } 7798 7799 pr_info("Console audio control enabled, mode: %s\n", 7800 (volume_control_allowed) ? 7801 "override (read/write)" : 7802 "monitor (read only)"); 7803 } 7804 7805 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7806 "registering volume hotkeys as change notification\n"); 7807 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7808 | TP_ACPI_HKEY_VOLUP_MASK 7809 | TP_ACPI_HKEY_VOLDWN_MASK 7810 | TP_ACPI_HKEY_MUTE_MASK); 7811 7812 return 0; 7813 } 7814 7815 static int volume_read(struct seq_file *m) 7816 { 7817 u8 status; 7818 7819 if (volume_get_status(&status) < 0) { 7820 seq_printf(m, "level:\t\tunreadable\n"); 7821 } else { 7822 if (tp_features.mixer_no_level_control) 7823 seq_printf(m, "level:\t\tunsupported\n"); 7824 else 7825 seq_printf(m, "level:\t\t%d\n", 7826 status & TP_EC_AUDIO_LVL_MSK); 7827 7828 seq_printf(m, "mute:\t\t%s\n", 7829 onoff(status, TP_EC_AUDIO_MUTESW)); 7830 7831 if (volume_control_allowed) { 7832 seq_printf(m, "commands:\tunmute, mute\n"); 7833 if (!tp_features.mixer_no_level_control) { 7834 seq_printf(m, "commands:\tup, down\n"); 7835 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7836 TP_EC_VOLUME_MAX); 7837 } 7838 } 7839 } 7840 7841 return 0; 7842 } 7843 7844 static int volume_write(char *buf) 7845 { 7846 u8 s; 7847 u8 new_level, new_mute; 7848 int l; 7849 char *cmd; 7850 int rc; 7851 7852 /* 7853 * We do allow volume control at driver startup, so that the 7854 * user can set initial state through the volume=... parameter hack. 7855 */ 7856 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7857 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7858 tp_warned.volume_ctrl_forbidden = 1; 7859 pr_notice("Console audio control in monitor mode, changes are not allowed\n"); 7860 pr_notice("Use the volume_control=1 module parameter to enable volume control\n"); 7861 } 7862 return -EPERM; 7863 } 7864 7865 rc = volume_get_status(&s); 7866 if (rc < 0) 7867 return rc; 7868 7869 new_level = s & TP_EC_AUDIO_LVL_MSK; 7870 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7871 7872 while ((cmd = next_cmd(&buf))) { 7873 if (!tp_features.mixer_no_level_control) { 7874 if (strlencmp(cmd, "up") == 0) { 7875 if (new_mute) 7876 new_mute = 0; 7877 else if (new_level < TP_EC_VOLUME_MAX) 7878 new_level++; 7879 continue; 7880 } else if (strlencmp(cmd, "down") == 0) { 7881 if (new_mute) 7882 new_mute = 0; 7883 else if (new_level > 0) 7884 new_level--; 7885 continue; 7886 } else if (sscanf(cmd, "level %u", &l) == 1 && 7887 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7888 new_level = l; 7889 continue; 7890 } 7891 } 7892 if (strlencmp(cmd, "mute") == 0) 7893 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7894 else if (strlencmp(cmd, "unmute") == 0) 7895 new_mute = 0; 7896 else 7897 return -EINVAL; 7898 } 7899 7900 if (tp_features.mixer_no_level_control) { 7901 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7902 new_mute ? "" : "un"); 7903 rc = volume_set_mute(!!new_mute); 7904 } else { 7905 tpacpi_disclose_usertask("procfs volume", 7906 "%smute and set level to %d\n", 7907 new_mute ? "" : "un", new_level); 7908 rc = volume_set_status(new_mute | new_level); 7909 } 7910 volume_alsa_notify_change(); 7911 7912 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7913 } 7914 7915 static struct ibm_struct volume_driver_data = { 7916 .name = "volume", 7917 .read = volume_read, 7918 .write = volume_write, 7919 .exit = volume_exit, 7920 .suspend = volume_suspend, 7921 .resume = volume_resume, 7922 .shutdown = volume_shutdown, 7923 }; 7924 7925 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7926 7927 #define alsa_card NULL 7928 7929 static inline void volume_alsa_notify_change(void) 7930 { 7931 } 7932 7933 static int __init volume_init(struct ibm_init_struct *iibm) 7934 { 7935 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7936 7937 return 1; 7938 } 7939 7940 static struct ibm_struct volume_driver_data = { 7941 .name = "volume", 7942 }; 7943 7944 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7945 7946 /************************************************************************* 7947 * Fan subdriver 7948 */ 7949 7950 /* 7951 * FAN ACCESS MODES 7952 * 7953 * TPACPI_FAN_RD_ACPI_GFAN: 7954 * ACPI GFAN method: returns fan level 7955 * 7956 * see TPACPI_FAN_WR_ACPI_SFAN 7957 * EC 0x2f (HFSP) not available if GFAN exists 7958 * 7959 * TPACPI_FAN_WR_ACPI_SFAN: 7960 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7961 * 7962 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7963 * it for writing. 7964 * 7965 * TPACPI_FAN_WR_TPEC: 7966 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7967 * Supported on almost all ThinkPads 7968 * 7969 * Fan speed changes of any sort (including those caused by the 7970 * disengaged mode) are usually done slowly by the firmware as the 7971 * maximum amount of fan duty cycle change per second seems to be 7972 * limited. 7973 * 7974 * Reading is not available if GFAN exists. 7975 * Writing is not available if SFAN exists. 7976 * 7977 * Bits 7978 * 7 automatic mode engaged; 7979 * (default operation mode of the ThinkPad) 7980 * fan level is ignored in this mode. 7981 * 6 full speed mode (takes precedence over bit 7); 7982 * not available on all thinkpads. May disable 7983 * the tachometer while the fan controller ramps up 7984 * the speed (which can take up to a few *minutes*). 7985 * Speeds up fan to 100% duty-cycle, which is far above 7986 * the standard RPM levels. It is not impossible that 7987 * it could cause hardware damage. 7988 * 5-3 unused in some models. Extra bits for fan level 7989 * in others, but still useless as all values above 7990 * 7 map to the same speed as level 7 in these models. 7991 * 2-0 fan level (0..7 usually) 7992 * 0x00 = stop 7993 * 0x07 = max (set when temperatures critical) 7994 * Some ThinkPads may have other levels, see 7995 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7996 * 7997 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7998 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7999 * does so, its initial value is meaningless (0x07). 8000 * 8001 * For firmware bugs, refer to: 8002 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 8003 * 8004 * ---- 8005 * 8006 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 8007 * Main fan tachometer reading (in RPM) 8008 * 8009 * This register is present on all ThinkPads with a new-style EC, and 8010 * it is known not to be present on the A21m/e, and T22, as there is 8011 * something else in offset 0x84 according to the ACPI DSDT. Other 8012 * ThinkPads from this same time period (and earlier) probably lack the 8013 * tachometer as well. 8014 * 8015 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 8016 * was never fixed by IBM to report the EC firmware version string 8017 * probably support the tachometer (like the early X models), so 8018 * detecting it is quite hard. We need more data to know for sure. 8019 * 8020 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 8021 * might result. 8022 * 8023 * FIRMWARE BUG: may go stale while the EC is switching to full speed 8024 * mode. 8025 * 8026 * For firmware bugs, refer to: 8027 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 8028 * 8029 * ---- 8030 * 8031 * ThinkPad EC register 0x31 bit 0 (only on select models) 8032 * 8033 * When bit 0 of EC register 0x31 is zero, the tachometer registers 8034 * show the speed of the main fan. When bit 0 of EC register 0x31 8035 * is one, the tachometer registers show the speed of the auxiliary 8036 * fan. 8037 * 8038 * Fan control seems to affect both fans, regardless of the state 8039 * of this bit. 8040 * 8041 * So far, only the firmware for the X60/X61 non-tablet versions 8042 * seem to support this (firmware TP-7M). 8043 * 8044 * TPACPI_FAN_WR_ACPI_FANS: 8045 * ThinkPad X31, X40, X41. Not available in the X60. 8046 * 8047 * FANS ACPI handle: takes three arguments: low speed, medium speed, 8048 * high speed. ACPI DSDT seems to map these three speeds to levels 8049 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 8050 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 8051 * 8052 * The speeds are stored on handles 8053 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 8054 * 8055 * There are three default speed sets, accessible as handles: 8056 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 8057 * 8058 * ACPI DSDT switches which set is in use depending on various 8059 * factors. 8060 * 8061 * TPACPI_FAN_WR_TPEC is also available and should be used to 8062 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 8063 * but the ACPI tables just mention level 7. 8064 */ 8065 8066 enum { /* Fan control constants */ 8067 fan_status_offset = 0x2f, /* EC register 0x2f */ 8068 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 8069 * 0x84 must be read before 0x85 */ 8070 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 8071 bit 0 selects which fan is active */ 8072 8073 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 8074 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 8075 8076 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 8077 }; 8078 8079 enum fan_status_access_mode { 8080 TPACPI_FAN_NONE = 0, /* No fan status or control */ 8081 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 8082 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 8083 }; 8084 8085 enum fan_control_access_mode { 8086 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 8087 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 8088 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 8089 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 8090 }; 8091 8092 enum fan_control_commands { 8093 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 8094 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 8095 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 8096 * and also watchdog cmd */ 8097 }; 8098 8099 static bool fan_control_allowed; 8100 8101 static enum fan_status_access_mode fan_status_access_mode; 8102 static enum fan_control_access_mode fan_control_access_mode; 8103 static enum fan_control_commands fan_control_commands; 8104 8105 static u8 fan_control_initial_status; 8106 static u8 fan_control_desired_level; 8107 static u8 fan_control_resume_level; 8108 static int fan_watchdog_maxinterval; 8109 8110 static struct mutex fan_mutex; 8111 8112 static void fan_watchdog_fire(struct work_struct *ignored); 8113 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 8114 8115 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 8116 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 8117 "\\FSPD", /* 600e/x, 770e, 770x */ 8118 ); /* all others */ 8119 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 8120 "JFNS", /* 770x-JL */ 8121 ); /* all others */ 8122 8123 /* 8124 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 8125 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 8126 * be in auto mode (0x80). 8127 * 8128 * This is corrected by any write to HFSP either by the driver, or 8129 * by the firmware. 8130 * 8131 * We assume 0x07 really means auto mode while this quirk is active, 8132 * as this is far more likely than the ThinkPad being in level 7, 8133 * which is only used by the firmware during thermal emergencies. 8134 * 8135 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 8136 * TP-70 (T43, R52), which are known to be buggy. 8137 */ 8138 8139 static void fan_quirk1_setup(void) 8140 { 8141 if (fan_control_initial_status == 0x07) { 8142 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n"); 8143 tp_features.fan_ctrl_status_undef = 1; 8144 } 8145 } 8146 8147 static void fan_quirk1_handle(u8 *fan_status) 8148 { 8149 if (unlikely(tp_features.fan_ctrl_status_undef)) { 8150 if (*fan_status != fan_control_initial_status) { 8151 /* something changed the HFSP regisnter since 8152 * driver init time, so it is not undefined 8153 * anymore */ 8154 tp_features.fan_ctrl_status_undef = 0; 8155 } else { 8156 /* Return most likely status. In fact, it 8157 * might be the only possible status */ 8158 *fan_status = TP_EC_FAN_AUTO; 8159 } 8160 } 8161 } 8162 8163 /* Select main fan on X60/X61, NOOP on others */ 8164 static bool fan_select_fan1(void) 8165 { 8166 if (tp_features.second_fan) { 8167 u8 val; 8168 8169 if (ec_read(fan_select_offset, &val) < 0) 8170 return false; 8171 val &= 0xFEU; 8172 if (ec_write(fan_select_offset, val) < 0) 8173 return false; 8174 } 8175 return true; 8176 } 8177 8178 /* Select secondary fan on X60/X61 */ 8179 static bool fan_select_fan2(void) 8180 { 8181 u8 val; 8182 8183 if (!tp_features.second_fan) 8184 return false; 8185 8186 if (ec_read(fan_select_offset, &val) < 0) 8187 return false; 8188 val |= 0x01U; 8189 if (ec_write(fan_select_offset, val) < 0) 8190 return false; 8191 8192 return true; 8193 } 8194 8195 /* 8196 * Call with fan_mutex held 8197 */ 8198 static void fan_update_desired_level(u8 status) 8199 { 8200 if ((status & 8201 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8202 if (status > 7) 8203 fan_control_desired_level = 7; 8204 else 8205 fan_control_desired_level = status; 8206 } 8207 } 8208 8209 static int fan_get_status(u8 *status) 8210 { 8211 u8 s; 8212 8213 /* TODO: 8214 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8215 8216 switch (fan_status_access_mode) { 8217 case TPACPI_FAN_RD_ACPI_GFAN: { 8218 /* 570, 600e/x, 770e, 770x */ 8219 int res; 8220 8221 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8222 return -EIO; 8223 8224 if (likely(status)) 8225 *status = res & 0x07; 8226 8227 break; 8228 } 8229 case TPACPI_FAN_RD_TPEC: 8230 /* all except 570, 600e/x, 770e, 770x */ 8231 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8232 return -EIO; 8233 8234 if (likely(status)) { 8235 *status = s; 8236 fan_quirk1_handle(status); 8237 } 8238 8239 break; 8240 8241 default: 8242 return -ENXIO; 8243 } 8244 8245 return 0; 8246 } 8247 8248 static int fan_get_status_safe(u8 *status) 8249 { 8250 int rc; 8251 u8 s; 8252 8253 if (mutex_lock_killable(&fan_mutex)) 8254 return -ERESTARTSYS; 8255 rc = fan_get_status(&s); 8256 if (!rc) 8257 fan_update_desired_level(s); 8258 mutex_unlock(&fan_mutex); 8259 8260 if (rc) 8261 return rc; 8262 if (status) 8263 *status = s; 8264 8265 return 0; 8266 } 8267 8268 static int fan_get_speed(unsigned int *speed) 8269 { 8270 u8 hi, lo; 8271 8272 switch (fan_status_access_mode) { 8273 case TPACPI_FAN_RD_TPEC: 8274 /* all except 570, 600e/x, 770e, 770x */ 8275 if (unlikely(!fan_select_fan1())) 8276 return -EIO; 8277 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8278 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8279 return -EIO; 8280 8281 if (likely(speed)) 8282 *speed = (hi << 8) | lo; 8283 8284 break; 8285 8286 default: 8287 return -ENXIO; 8288 } 8289 8290 return 0; 8291 } 8292 8293 static int fan2_get_speed(unsigned int *speed) 8294 { 8295 u8 hi, lo; 8296 bool rc; 8297 8298 switch (fan_status_access_mode) { 8299 case TPACPI_FAN_RD_TPEC: 8300 /* all except 570, 600e/x, 770e, 770x */ 8301 if (unlikely(!fan_select_fan2())) 8302 return -EIO; 8303 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8304 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8305 fan_select_fan1(); /* play it safe */ 8306 if (rc) 8307 return -EIO; 8308 8309 if (likely(speed)) 8310 *speed = (hi << 8) | lo; 8311 8312 break; 8313 8314 default: 8315 return -ENXIO; 8316 } 8317 8318 return 0; 8319 } 8320 8321 static int fan_set_level(int level) 8322 { 8323 if (!fan_control_allowed) 8324 return -EPERM; 8325 8326 switch (fan_control_access_mode) { 8327 case TPACPI_FAN_WR_ACPI_SFAN: 8328 if (level >= 0 && level <= 7) { 8329 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8330 return -EIO; 8331 } else 8332 return -EINVAL; 8333 break; 8334 8335 case TPACPI_FAN_WR_ACPI_FANS: 8336 case TPACPI_FAN_WR_TPEC: 8337 if (!(level & TP_EC_FAN_AUTO) && 8338 !(level & TP_EC_FAN_FULLSPEED) && 8339 ((level < 0) || (level > 7))) 8340 return -EINVAL; 8341 8342 /* safety net should the EC not support AUTO 8343 * or FULLSPEED mode bits and just ignore them */ 8344 if (level & TP_EC_FAN_FULLSPEED) 8345 level |= 7; /* safety min speed 7 */ 8346 else if (level & TP_EC_FAN_AUTO) 8347 level |= 4; /* safety min speed 4 */ 8348 8349 if (!acpi_ec_write(fan_status_offset, level)) 8350 return -EIO; 8351 else 8352 tp_features.fan_ctrl_status_undef = 0; 8353 break; 8354 8355 default: 8356 return -ENXIO; 8357 } 8358 8359 vdbg_printk(TPACPI_DBG_FAN, 8360 "fan control: set fan control register to 0x%02x\n", level); 8361 return 0; 8362 } 8363 8364 static int fan_set_level_safe(int level) 8365 { 8366 int rc; 8367 8368 if (!fan_control_allowed) 8369 return -EPERM; 8370 8371 if (mutex_lock_killable(&fan_mutex)) 8372 return -ERESTARTSYS; 8373 8374 if (level == TPACPI_FAN_LAST_LEVEL) 8375 level = fan_control_desired_level; 8376 8377 rc = fan_set_level(level); 8378 if (!rc) 8379 fan_update_desired_level(level); 8380 8381 mutex_unlock(&fan_mutex); 8382 return rc; 8383 } 8384 8385 static int fan_set_enable(void) 8386 { 8387 u8 s; 8388 int rc; 8389 8390 if (!fan_control_allowed) 8391 return -EPERM; 8392 8393 if (mutex_lock_killable(&fan_mutex)) 8394 return -ERESTARTSYS; 8395 8396 switch (fan_control_access_mode) { 8397 case TPACPI_FAN_WR_ACPI_FANS: 8398 case TPACPI_FAN_WR_TPEC: 8399 rc = fan_get_status(&s); 8400 if (rc < 0) 8401 break; 8402 8403 /* Don't go out of emergency fan mode */ 8404 if (s != 7) { 8405 s &= 0x07; 8406 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8407 } 8408 8409 if (!acpi_ec_write(fan_status_offset, s)) 8410 rc = -EIO; 8411 else { 8412 tp_features.fan_ctrl_status_undef = 0; 8413 rc = 0; 8414 } 8415 break; 8416 8417 case TPACPI_FAN_WR_ACPI_SFAN: 8418 rc = fan_get_status(&s); 8419 if (rc < 0) 8420 break; 8421 8422 s &= 0x07; 8423 8424 /* Set fan to at least level 4 */ 8425 s |= 4; 8426 8427 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8428 rc = -EIO; 8429 else 8430 rc = 0; 8431 break; 8432 8433 default: 8434 rc = -ENXIO; 8435 } 8436 8437 mutex_unlock(&fan_mutex); 8438 8439 if (!rc) 8440 vdbg_printk(TPACPI_DBG_FAN, 8441 "fan control: set fan control register to 0x%02x\n", 8442 s); 8443 return rc; 8444 } 8445 8446 static int fan_set_disable(void) 8447 { 8448 int rc; 8449 8450 if (!fan_control_allowed) 8451 return -EPERM; 8452 8453 if (mutex_lock_killable(&fan_mutex)) 8454 return -ERESTARTSYS; 8455 8456 rc = 0; 8457 switch (fan_control_access_mode) { 8458 case TPACPI_FAN_WR_ACPI_FANS: 8459 case TPACPI_FAN_WR_TPEC: 8460 if (!acpi_ec_write(fan_status_offset, 0x00)) 8461 rc = -EIO; 8462 else { 8463 fan_control_desired_level = 0; 8464 tp_features.fan_ctrl_status_undef = 0; 8465 } 8466 break; 8467 8468 case TPACPI_FAN_WR_ACPI_SFAN: 8469 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8470 rc = -EIO; 8471 else 8472 fan_control_desired_level = 0; 8473 break; 8474 8475 default: 8476 rc = -ENXIO; 8477 } 8478 8479 if (!rc) 8480 vdbg_printk(TPACPI_DBG_FAN, 8481 "fan control: set fan control register to 0\n"); 8482 8483 mutex_unlock(&fan_mutex); 8484 return rc; 8485 } 8486 8487 static int fan_set_speed(int speed) 8488 { 8489 int rc; 8490 8491 if (!fan_control_allowed) 8492 return -EPERM; 8493 8494 if (mutex_lock_killable(&fan_mutex)) 8495 return -ERESTARTSYS; 8496 8497 rc = 0; 8498 switch (fan_control_access_mode) { 8499 case TPACPI_FAN_WR_ACPI_FANS: 8500 if (speed >= 0 && speed <= 65535) { 8501 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8502 speed, speed, speed)) 8503 rc = -EIO; 8504 } else 8505 rc = -EINVAL; 8506 break; 8507 8508 default: 8509 rc = -ENXIO; 8510 } 8511 8512 mutex_unlock(&fan_mutex); 8513 return rc; 8514 } 8515 8516 static void fan_watchdog_reset(void) 8517 { 8518 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8519 return; 8520 8521 if (fan_watchdog_maxinterval > 0 && 8522 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8523 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8524 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8525 else 8526 cancel_delayed_work(&fan_watchdog_task); 8527 } 8528 8529 static void fan_watchdog_fire(struct work_struct *ignored) 8530 { 8531 int rc; 8532 8533 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8534 return; 8535 8536 pr_notice("fan watchdog: enabling fan\n"); 8537 rc = fan_set_enable(); 8538 if (rc < 0) { 8539 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n", 8540 rc); 8541 /* reschedule for later */ 8542 fan_watchdog_reset(); 8543 } 8544 } 8545 8546 /* 8547 * SYSFS fan layout: hwmon compatible (device) 8548 * 8549 * pwm*_enable: 8550 * 0: "disengaged" mode 8551 * 1: manual mode 8552 * 2: native EC "auto" mode (recommended, hardware default) 8553 * 8554 * pwm*: set speed in manual mode, ignored otherwise. 8555 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8556 * interpolation. 8557 * 8558 * fan*_input: tachometer reading, RPM 8559 * 8560 * 8561 * SYSFS fan layout: extensions 8562 * 8563 * fan_watchdog (driver): 8564 * fan watchdog interval in seconds, 0 disables (default), max 120 8565 */ 8566 8567 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8568 static ssize_t fan_pwm1_enable_show(struct device *dev, 8569 struct device_attribute *attr, 8570 char *buf) 8571 { 8572 int res, mode; 8573 u8 status; 8574 8575 res = fan_get_status_safe(&status); 8576 if (res) 8577 return res; 8578 8579 if (status & TP_EC_FAN_FULLSPEED) { 8580 mode = 0; 8581 } else if (status & TP_EC_FAN_AUTO) { 8582 mode = 2; 8583 } else 8584 mode = 1; 8585 8586 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8587 } 8588 8589 static ssize_t fan_pwm1_enable_store(struct device *dev, 8590 struct device_attribute *attr, 8591 const char *buf, size_t count) 8592 { 8593 unsigned long t; 8594 int res, level; 8595 8596 if (parse_strtoul(buf, 2, &t)) 8597 return -EINVAL; 8598 8599 tpacpi_disclose_usertask("hwmon pwm1_enable", 8600 "set fan mode to %lu\n", t); 8601 8602 switch (t) { 8603 case 0: 8604 level = TP_EC_FAN_FULLSPEED; 8605 break; 8606 case 1: 8607 level = TPACPI_FAN_LAST_LEVEL; 8608 break; 8609 case 2: 8610 level = TP_EC_FAN_AUTO; 8611 break; 8612 case 3: 8613 /* reserved for software-controlled auto mode */ 8614 return -ENOSYS; 8615 default: 8616 return -EINVAL; 8617 } 8618 8619 res = fan_set_level_safe(level); 8620 if (res == -ENXIO) 8621 return -EINVAL; 8622 else if (res < 0) 8623 return res; 8624 8625 fan_watchdog_reset(); 8626 8627 return count; 8628 } 8629 8630 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8631 fan_pwm1_enable_show, fan_pwm1_enable_store); 8632 8633 /* sysfs fan pwm1 ------------------------------------------------------ */ 8634 static ssize_t fan_pwm1_show(struct device *dev, 8635 struct device_attribute *attr, 8636 char *buf) 8637 { 8638 int res; 8639 u8 status; 8640 8641 res = fan_get_status_safe(&status); 8642 if (res) 8643 return res; 8644 8645 if ((status & 8646 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8647 status = fan_control_desired_level; 8648 8649 if (status > 7) 8650 status = 7; 8651 8652 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8653 } 8654 8655 static ssize_t fan_pwm1_store(struct device *dev, 8656 struct device_attribute *attr, 8657 const char *buf, size_t count) 8658 { 8659 unsigned long s; 8660 int rc; 8661 u8 status, newlevel; 8662 8663 if (parse_strtoul(buf, 255, &s)) 8664 return -EINVAL; 8665 8666 tpacpi_disclose_usertask("hwmon pwm1", 8667 "set fan speed to %lu\n", s); 8668 8669 /* scale down from 0-255 to 0-7 */ 8670 newlevel = (s >> 5) & 0x07; 8671 8672 if (mutex_lock_killable(&fan_mutex)) 8673 return -ERESTARTSYS; 8674 8675 rc = fan_get_status(&status); 8676 if (!rc && (status & 8677 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8678 rc = fan_set_level(newlevel); 8679 if (rc == -ENXIO) 8680 rc = -EINVAL; 8681 else if (!rc) { 8682 fan_update_desired_level(newlevel); 8683 fan_watchdog_reset(); 8684 } 8685 } 8686 8687 mutex_unlock(&fan_mutex); 8688 return (rc) ? rc : count; 8689 } 8690 8691 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8692 8693 /* sysfs fan fan1_input ------------------------------------------------ */ 8694 static ssize_t fan_fan1_input_show(struct device *dev, 8695 struct device_attribute *attr, 8696 char *buf) 8697 { 8698 int res; 8699 unsigned int speed; 8700 8701 res = fan_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(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8709 8710 /* sysfs fan fan2_input ------------------------------------------------ */ 8711 static ssize_t fan_fan2_input_show(struct device *dev, 8712 struct device_attribute *attr, 8713 char *buf) 8714 { 8715 int res; 8716 unsigned int speed; 8717 8718 res = fan2_get_speed(&speed); 8719 if (res < 0) 8720 return res; 8721 8722 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8723 } 8724 8725 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8726 8727 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8728 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf) 8729 { 8730 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8731 } 8732 8733 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf, 8734 size_t count) 8735 { 8736 unsigned long t; 8737 8738 if (parse_strtoul(buf, 120, &t)) 8739 return -EINVAL; 8740 8741 if (!fan_control_allowed) 8742 return -EPERM; 8743 8744 fan_watchdog_maxinterval = t; 8745 fan_watchdog_reset(); 8746 8747 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8748 8749 return count; 8750 } 8751 static DRIVER_ATTR_RW(fan_watchdog); 8752 8753 /* --------------------------------------------------------------------- */ 8754 static struct attribute *fan_attributes[] = { 8755 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8756 &dev_attr_fan1_input.attr, 8757 NULL, /* for fan2_input */ 8758 NULL 8759 }; 8760 8761 static const struct attribute_group fan_attr_group = { 8762 .attrs = fan_attributes, 8763 }; 8764 8765 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8766 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8767 8768 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8769 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1), 8770 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1), 8771 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1), 8772 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1), 8773 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN), 8774 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN), 8775 }; 8776 8777 static int __init fan_init(struct ibm_init_struct *iibm) 8778 { 8779 int rc; 8780 unsigned long quirks; 8781 8782 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8783 "initializing fan subdriver\n"); 8784 8785 mutex_init(&fan_mutex); 8786 fan_status_access_mode = TPACPI_FAN_NONE; 8787 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8788 fan_control_commands = 0; 8789 fan_watchdog_maxinterval = 0; 8790 tp_features.fan_ctrl_status_undef = 0; 8791 tp_features.second_fan = 0; 8792 fan_control_desired_level = 7; 8793 8794 if (tpacpi_is_ibm()) { 8795 TPACPI_ACPIHANDLE_INIT(fans); 8796 TPACPI_ACPIHANDLE_INIT(gfan); 8797 TPACPI_ACPIHANDLE_INIT(sfan); 8798 } 8799 8800 quirks = tpacpi_check_quirks(fan_quirk_table, 8801 ARRAY_SIZE(fan_quirk_table)); 8802 8803 if (gfan_handle) { 8804 /* 570, 600e/x, 770e, 770x */ 8805 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8806 } else { 8807 /* all other ThinkPads: note that even old-style 8808 * ThinkPad ECs supports the fan control register */ 8809 if (likely(acpi_ec_read(fan_status_offset, 8810 &fan_control_initial_status))) { 8811 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8812 if (quirks & TPACPI_FAN_Q1) 8813 fan_quirk1_setup(); 8814 if (quirks & TPACPI_FAN_2FAN) { 8815 tp_features.second_fan = 1; 8816 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8817 "secondary fan support enabled\n"); 8818 } 8819 } else { 8820 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n"); 8821 return 1; 8822 } 8823 } 8824 8825 if (sfan_handle) { 8826 /* 570, 770x-JL */ 8827 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8828 fan_control_commands |= 8829 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8830 } else { 8831 if (!gfan_handle) { 8832 /* gfan without sfan means no fan control */ 8833 /* all other models implement TP EC 0x2f control */ 8834 8835 if (fans_handle) { 8836 /* X31, X40, X41 */ 8837 fan_control_access_mode = 8838 TPACPI_FAN_WR_ACPI_FANS; 8839 fan_control_commands |= 8840 TPACPI_FAN_CMD_SPEED | 8841 TPACPI_FAN_CMD_LEVEL | 8842 TPACPI_FAN_CMD_ENABLE; 8843 } else { 8844 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8845 fan_control_commands |= 8846 TPACPI_FAN_CMD_LEVEL | 8847 TPACPI_FAN_CMD_ENABLE; 8848 } 8849 } 8850 } 8851 8852 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8853 "fan is %s, modes %d, %d\n", 8854 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8855 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8856 fan_status_access_mode, fan_control_access_mode); 8857 8858 /* fan control master switch */ 8859 if (!fan_control_allowed) { 8860 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8861 fan_control_commands = 0; 8862 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8863 "fan control features disabled by parameter\n"); 8864 } 8865 8866 /* update fan_control_desired_level */ 8867 if (fan_status_access_mode != TPACPI_FAN_NONE) 8868 fan_get_status_safe(NULL); 8869 8870 if (fan_status_access_mode != TPACPI_FAN_NONE || 8871 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8872 if (tp_features.second_fan) { 8873 /* attach second fan tachometer */ 8874 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8875 &dev_attr_fan2_input.attr; 8876 } 8877 rc = sysfs_create_group(&tpacpi_hwmon->kobj, 8878 &fan_attr_group); 8879 if (rc < 0) 8880 return rc; 8881 8882 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8883 &driver_attr_fan_watchdog); 8884 if (rc < 0) { 8885 sysfs_remove_group(&tpacpi_hwmon->kobj, 8886 &fan_attr_group); 8887 return rc; 8888 } 8889 return 0; 8890 } else 8891 return 1; 8892 } 8893 8894 static void fan_exit(void) 8895 { 8896 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8897 "cancelling any pending fan watchdog tasks\n"); 8898 8899 /* FIXME: can we really do this unconditionally? */ 8900 sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group); 8901 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8902 &driver_attr_fan_watchdog); 8903 8904 cancel_delayed_work(&fan_watchdog_task); 8905 flush_workqueue(tpacpi_wq); 8906 } 8907 8908 static void fan_suspend(void) 8909 { 8910 int rc; 8911 8912 if (!fan_control_allowed) 8913 return; 8914 8915 /* Store fan status in cache */ 8916 fan_control_resume_level = 0; 8917 rc = fan_get_status_safe(&fan_control_resume_level); 8918 if (rc < 0) 8919 pr_notice("failed to read fan level for later restore during resume: %d\n", 8920 rc); 8921 8922 /* if it is undefined, don't attempt to restore it. 8923 * KEEP THIS LAST */ 8924 if (tp_features.fan_ctrl_status_undef) 8925 fan_control_resume_level = 0; 8926 } 8927 8928 static void fan_resume(void) 8929 { 8930 u8 current_level = 7; 8931 bool do_set = false; 8932 int rc; 8933 8934 /* DSDT *always* updates status on resume */ 8935 tp_features.fan_ctrl_status_undef = 0; 8936 8937 if (!fan_control_allowed || 8938 !fan_control_resume_level || 8939 (fan_get_status_safe(¤t_level) < 0)) 8940 return; 8941 8942 switch (fan_control_access_mode) { 8943 case TPACPI_FAN_WR_ACPI_SFAN: 8944 /* never decrease fan level */ 8945 do_set = (fan_control_resume_level > current_level); 8946 break; 8947 case TPACPI_FAN_WR_ACPI_FANS: 8948 case TPACPI_FAN_WR_TPEC: 8949 /* never decrease fan level, scale is: 8950 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8951 * 8952 * We expect the firmware to set either 7 or AUTO, but we 8953 * handle FULLSPEED out of paranoia. 8954 * 8955 * So, we can safely only restore FULLSPEED or 7, anything 8956 * else could slow the fan. Restoring AUTO is useless, at 8957 * best that's exactly what the DSDT already set (it is the 8958 * slower it uses). 8959 * 8960 * Always keep in mind that the DSDT *will* have set the 8961 * fans to what the vendor supposes is the best level. We 8962 * muck with it only to speed the fan up. 8963 */ 8964 if (fan_control_resume_level != 7 && 8965 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8966 return; 8967 else 8968 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8969 (current_level != fan_control_resume_level); 8970 break; 8971 default: 8972 return; 8973 } 8974 if (do_set) { 8975 pr_notice("restoring fan level to 0x%02x\n", 8976 fan_control_resume_level); 8977 rc = fan_set_level_safe(fan_control_resume_level); 8978 if (rc < 0) 8979 pr_notice("failed to restore fan level: %d\n", rc); 8980 } 8981 } 8982 8983 static int fan_read(struct seq_file *m) 8984 { 8985 int rc; 8986 u8 status; 8987 unsigned int speed = 0; 8988 8989 switch (fan_status_access_mode) { 8990 case TPACPI_FAN_RD_ACPI_GFAN: 8991 /* 570, 600e/x, 770e, 770x */ 8992 rc = fan_get_status_safe(&status); 8993 if (rc < 0) 8994 return rc; 8995 8996 seq_printf(m, "status:\t\t%s\n" 8997 "level:\t\t%d\n", 8998 (status != 0) ? "enabled" : "disabled", status); 8999 break; 9000 9001 case TPACPI_FAN_RD_TPEC: 9002 /* all except 570, 600e/x, 770e, 770x */ 9003 rc = fan_get_status_safe(&status); 9004 if (rc < 0) 9005 return rc; 9006 9007 seq_printf(m, "status:\t\t%s\n", 9008 (status != 0) ? "enabled" : "disabled"); 9009 9010 rc = fan_get_speed(&speed); 9011 if (rc < 0) 9012 return rc; 9013 9014 seq_printf(m, "speed:\t\t%d\n", speed); 9015 9016 if (status & TP_EC_FAN_FULLSPEED) 9017 /* Disengaged mode takes precedence */ 9018 seq_printf(m, "level:\t\tdisengaged\n"); 9019 else if (status & TP_EC_FAN_AUTO) 9020 seq_printf(m, "level:\t\tauto\n"); 9021 else 9022 seq_printf(m, "level:\t\t%d\n", status); 9023 break; 9024 9025 case TPACPI_FAN_NONE: 9026 default: 9027 seq_printf(m, "status:\t\tnot supported\n"); 9028 } 9029 9030 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 9031 seq_printf(m, "commands:\tlevel <level>"); 9032 9033 switch (fan_control_access_mode) { 9034 case TPACPI_FAN_WR_ACPI_SFAN: 9035 seq_printf(m, " (<level> is 0-7)\n"); 9036 break; 9037 9038 default: 9039 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n"); 9040 break; 9041 } 9042 } 9043 9044 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 9045 seq_printf(m, "commands:\tenable, disable\n" 9046 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n"); 9047 9048 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 9049 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n"); 9050 9051 return 0; 9052 } 9053 9054 static int fan_write_cmd_level(const char *cmd, int *rc) 9055 { 9056 int level; 9057 9058 if (strlencmp(cmd, "level auto") == 0) 9059 level = TP_EC_FAN_AUTO; 9060 else if ((strlencmp(cmd, "level disengaged") == 0) | 9061 (strlencmp(cmd, "level full-speed") == 0)) 9062 level = TP_EC_FAN_FULLSPEED; 9063 else if (sscanf(cmd, "level %d", &level) != 1) 9064 return 0; 9065 9066 *rc = fan_set_level_safe(level); 9067 if (*rc == -ENXIO) 9068 pr_err("level command accepted for unsupported access mode %d\n", 9069 fan_control_access_mode); 9070 else if (!*rc) 9071 tpacpi_disclose_usertask("procfs fan", 9072 "set level to %d\n", level); 9073 9074 return 1; 9075 } 9076 9077 static int fan_write_cmd_enable(const char *cmd, int *rc) 9078 { 9079 if (strlencmp(cmd, "enable") != 0) 9080 return 0; 9081 9082 *rc = fan_set_enable(); 9083 if (*rc == -ENXIO) 9084 pr_err("enable command accepted for unsupported access mode %d\n", 9085 fan_control_access_mode); 9086 else if (!*rc) 9087 tpacpi_disclose_usertask("procfs fan", "enable\n"); 9088 9089 return 1; 9090 } 9091 9092 static int fan_write_cmd_disable(const char *cmd, int *rc) 9093 { 9094 if (strlencmp(cmd, "disable") != 0) 9095 return 0; 9096 9097 *rc = fan_set_disable(); 9098 if (*rc == -ENXIO) 9099 pr_err("disable command accepted for unsupported access mode %d\n", 9100 fan_control_access_mode); 9101 else if (!*rc) 9102 tpacpi_disclose_usertask("procfs fan", "disable\n"); 9103 9104 return 1; 9105 } 9106 9107 static int fan_write_cmd_speed(const char *cmd, int *rc) 9108 { 9109 int speed; 9110 9111 /* TODO: 9112 * Support speed <low> <medium> <high> ? */ 9113 9114 if (sscanf(cmd, "speed %d", &speed) != 1) 9115 return 0; 9116 9117 *rc = fan_set_speed(speed); 9118 if (*rc == -ENXIO) 9119 pr_err("speed command accepted for unsupported access mode %d\n", 9120 fan_control_access_mode); 9121 else if (!*rc) 9122 tpacpi_disclose_usertask("procfs fan", 9123 "set speed to %d\n", speed); 9124 9125 return 1; 9126 } 9127 9128 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 9129 { 9130 int interval; 9131 9132 if (sscanf(cmd, "watchdog %d", &interval) != 1) 9133 return 0; 9134 9135 if (interval < 0 || interval > 120) 9136 *rc = -EINVAL; 9137 else { 9138 fan_watchdog_maxinterval = interval; 9139 tpacpi_disclose_usertask("procfs fan", 9140 "set watchdog timer to %d\n", 9141 interval); 9142 } 9143 9144 return 1; 9145 } 9146 9147 static int fan_write(char *buf) 9148 { 9149 char *cmd; 9150 int rc = 0; 9151 9152 while (!rc && (cmd = next_cmd(&buf))) { 9153 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 9154 fan_write_cmd_level(cmd, &rc)) && 9155 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 9156 (fan_write_cmd_enable(cmd, &rc) || 9157 fan_write_cmd_disable(cmd, &rc) || 9158 fan_write_cmd_watchdog(cmd, &rc))) && 9159 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 9160 fan_write_cmd_speed(cmd, &rc)) 9161 ) 9162 rc = -EINVAL; 9163 else if (!rc) 9164 fan_watchdog_reset(); 9165 } 9166 9167 return rc; 9168 } 9169 9170 static struct ibm_struct fan_driver_data = { 9171 .name = "fan", 9172 .read = fan_read, 9173 .write = fan_write, 9174 .exit = fan_exit, 9175 .suspend = fan_suspend, 9176 .resume = fan_resume, 9177 }; 9178 9179 /************************************************************************* 9180 * Mute LED subdriver 9181 */ 9182 9183 #define TPACPI_LED_MAX 2 9184 9185 struct tp_led_table { 9186 acpi_string name; 9187 int on_value; 9188 int off_value; 9189 int state; 9190 }; 9191 9192 static struct tp_led_table led_tables[TPACPI_LED_MAX] = { 9193 [LED_AUDIO_MUTE] = { 9194 .name = "SSMS", 9195 .on_value = 1, 9196 .off_value = 0, 9197 }, 9198 [LED_AUDIO_MICMUTE] = { 9199 .name = "MMTS", 9200 .on_value = 2, 9201 .off_value = 0, 9202 }, 9203 }; 9204 9205 static int mute_led_on_off(struct tp_led_table *t, bool state) 9206 { 9207 acpi_handle temp; 9208 int output; 9209 9210 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9211 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9212 return -EIO; 9213 } 9214 9215 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9216 state ? t->on_value : t->off_value)) 9217 return -EIO; 9218 9219 t->state = state; 9220 return state; 9221 } 9222 9223 static int tpacpi_led_set(int whichled, bool on) 9224 { 9225 struct tp_led_table *t; 9226 9227 t = &led_tables[whichled]; 9228 if (t->state < 0 || t->state == on) 9229 return t->state; 9230 return mute_led_on_off(t, on); 9231 } 9232 9233 static int tpacpi_led_mute_set(struct led_classdev *led_cdev, 9234 enum led_brightness brightness) 9235 { 9236 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF); 9237 } 9238 9239 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev, 9240 enum led_brightness brightness) 9241 { 9242 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF); 9243 } 9244 9245 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = { 9246 [LED_AUDIO_MUTE] = { 9247 .name = "platform::mute", 9248 .max_brightness = 1, 9249 .brightness_set_blocking = tpacpi_led_mute_set, 9250 .default_trigger = "audio-mute", 9251 }, 9252 [LED_AUDIO_MICMUTE] = { 9253 .name = "platform::micmute", 9254 .max_brightness = 1, 9255 .brightness_set_blocking = tpacpi_led_micmute_set, 9256 .default_trigger = "audio-micmute", 9257 }, 9258 }; 9259 9260 static int mute_led_init(struct ibm_init_struct *iibm) 9261 { 9262 acpi_handle temp; 9263 int i, err; 9264 9265 for (i = 0; i < TPACPI_LED_MAX; i++) { 9266 struct tp_led_table *t = &led_tables[i]; 9267 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9268 t->state = -ENODEV; 9269 continue; 9270 } 9271 9272 mute_led_cdev[i].brightness = ledtrig_audio_get(i); 9273 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]); 9274 if (err < 0) { 9275 while (i--) { 9276 if (led_tables[i].state >= 0) 9277 led_classdev_unregister(&mute_led_cdev[i]); 9278 } 9279 return err; 9280 } 9281 } 9282 return 0; 9283 } 9284 9285 static void mute_led_exit(void) 9286 { 9287 int i; 9288 9289 for (i = 0; i < TPACPI_LED_MAX; i++) { 9290 if (led_tables[i].state >= 0) { 9291 led_classdev_unregister(&mute_led_cdev[i]); 9292 tpacpi_led_set(i, false); 9293 } 9294 } 9295 } 9296 9297 static void mute_led_resume(void) 9298 { 9299 int i; 9300 9301 for (i = 0; i < TPACPI_LED_MAX; i++) { 9302 struct tp_led_table *t = &led_tables[i]; 9303 if (t->state >= 0) 9304 mute_led_on_off(t, t->state); 9305 } 9306 } 9307 9308 static struct ibm_struct mute_led_driver_data = { 9309 .name = "mute_led", 9310 .exit = mute_led_exit, 9311 .resume = mute_led_resume, 9312 }; 9313 9314 /* 9315 * Battery Wear Control Driver 9316 * Contact: Ognjen Galic <smclt30p@gmail.com> 9317 */ 9318 9319 /* Metadata */ 9320 9321 #define GET_START "BCTG" 9322 #define SET_START "BCCS" 9323 #define GET_STOP "BCSG" 9324 #define SET_STOP "BCSS" 9325 9326 #define START_ATTR "charge_start_threshold" 9327 #define STOP_ATTR "charge_stop_threshold" 9328 9329 enum { 9330 BAT_ANY = 0, 9331 BAT_PRIMARY = 1, 9332 BAT_SECONDARY = 2 9333 }; 9334 9335 enum { 9336 /* Error condition bit */ 9337 METHOD_ERR = BIT(31), 9338 }; 9339 9340 enum { 9341 /* This is used in the get/set helpers */ 9342 THRESHOLD_START, 9343 THRESHOLD_STOP, 9344 }; 9345 9346 struct tpacpi_battery_data { 9347 int charge_start; 9348 int start_support; 9349 int charge_stop; 9350 int stop_support; 9351 }; 9352 9353 struct tpacpi_battery_driver_data { 9354 struct tpacpi_battery_data batteries[3]; 9355 int individual_addressing; 9356 }; 9357 9358 static struct tpacpi_battery_driver_data battery_info; 9359 9360 /* ACPI helpers/functions/probes */ 9361 9362 /** 9363 * This evaluates a ACPI method call specific to the battery 9364 * ACPI extension. The specifics are that an error is marked 9365 * in the 32rd bit of the response, so we just check that here. 9366 */ 9367 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param) 9368 { 9369 int response; 9370 9371 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) { 9372 acpi_handle_err(hkey_handle, "%s: evaluate failed", method); 9373 return AE_ERROR; 9374 } 9375 if (response & METHOD_ERR) { 9376 acpi_handle_err(hkey_handle, 9377 "%s evaluated but flagged as error", method); 9378 return AE_ERROR; 9379 } 9380 *ret = response; 9381 return AE_OK; 9382 } 9383 9384 static int tpacpi_battery_get(int what, int battery, int *ret) 9385 { 9386 switch (what) { 9387 case THRESHOLD_START: 9388 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery)) 9389 return -ENODEV; 9390 9391 /* The value is in the low 8 bits of the response */ 9392 *ret = *ret & 0xFF; 9393 return 0; 9394 case THRESHOLD_STOP: 9395 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery)) 9396 return -ENODEV; 9397 /* Value is in lower 8 bits */ 9398 *ret = *ret & 0xFF; 9399 /* 9400 * On the stop value, if we return 0 that 9401 * does not make any sense. 0 means Default, which 9402 * means that charging stops at 100%, so we return 9403 * that. 9404 */ 9405 if (*ret == 0) 9406 *ret = 100; 9407 return 0; 9408 default: 9409 pr_crit("wrong parameter: %d", what); 9410 return -EINVAL; 9411 } 9412 } 9413 9414 static int tpacpi_battery_set(int what, int battery, int value) 9415 { 9416 int param, ret; 9417 /* The first 8 bits are the value of the threshold */ 9418 param = value; 9419 /* The battery ID is in bits 8-9, 2 bits */ 9420 param |= battery << 8; 9421 9422 switch (what) { 9423 case THRESHOLD_START: 9424 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) { 9425 pr_err("failed to set charge threshold on battery %d", 9426 battery); 9427 return -ENODEV; 9428 } 9429 return 0; 9430 case THRESHOLD_STOP: 9431 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) { 9432 pr_err("failed to set stop threshold: %d", battery); 9433 return -ENODEV; 9434 } 9435 return 0; 9436 default: 9437 pr_crit("wrong parameter: %d", what); 9438 return -EINVAL; 9439 } 9440 } 9441 9442 static int tpacpi_battery_probe(int battery) 9443 { 9444 int ret = 0; 9445 9446 memset(&battery_info.batteries[battery], 0, 9447 sizeof(battery_info.batteries[battery])); 9448 9449 /* 9450 * 1) Get the current start threshold 9451 * 2) Check for support 9452 * 3) Get the current stop threshold 9453 * 4) Check for support 9454 */ 9455 if (acpi_has_method(hkey_handle, GET_START)) { 9456 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { 9457 pr_err("Error probing battery %d\n", battery); 9458 return -ENODEV; 9459 } 9460 /* Individual addressing is in bit 9 */ 9461 if (ret & BIT(9)) 9462 battery_info.individual_addressing = true; 9463 /* Support is marked in bit 8 */ 9464 if (ret & BIT(8)) 9465 battery_info.batteries[battery].start_support = 1; 9466 else 9467 return -ENODEV; 9468 if (tpacpi_battery_get(THRESHOLD_START, battery, 9469 &battery_info.batteries[battery].charge_start)) { 9470 pr_err("Error probing battery %d\n", battery); 9471 return -ENODEV; 9472 } 9473 } 9474 if (acpi_has_method(hkey_handle, GET_STOP)) { 9475 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) { 9476 pr_err("Error probing battery stop; %d\n", battery); 9477 return -ENODEV; 9478 } 9479 /* Support is marked in bit 8 */ 9480 if (ret & BIT(8)) 9481 battery_info.batteries[battery].stop_support = 1; 9482 else 9483 return -ENODEV; 9484 if (tpacpi_battery_get(THRESHOLD_STOP, battery, 9485 &battery_info.batteries[battery].charge_stop)) { 9486 pr_err("Error probing battery stop: %d\n", battery); 9487 return -ENODEV; 9488 } 9489 } 9490 pr_info("battery %d registered (start %d, stop %d)", 9491 battery, 9492 battery_info.batteries[battery].charge_start, 9493 battery_info.batteries[battery].charge_stop); 9494 9495 return 0; 9496 } 9497 9498 /* General helper functions */ 9499 9500 static int tpacpi_battery_get_id(const char *battery_name) 9501 { 9502 9503 if (strcmp(battery_name, "BAT0") == 0 || 9504 tp_features.battery_force_primary) 9505 return BAT_PRIMARY; 9506 if (strcmp(battery_name, "BAT1") == 0) 9507 return BAT_SECONDARY; 9508 /* 9509 * If for some reason the battery is not BAT0 nor is it 9510 * BAT1, we will assume it's the default, first battery, 9511 * AKA primary. 9512 */ 9513 pr_warn("unknown battery %s, assuming primary", battery_name); 9514 return BAT_PRIMARY; 9515 } 9516 9517 /* sysfs interface */ 9518 9519 static ssize_t tpacpi_battery_store(int what, 9520 struct device *dev, 9521 const char *buf, size_t count) 9522 { 9523 struct power_supply *supply = to_power_supply(dev); 9524 unsigned long value; 9525 int battery, rval; 9526 /* 9527 * Some systems have support for more than 9528 * one battery. If that is the case, 9529 * tpacpi_battery_probe marked that addressing 9530 * them individually is supported, so we do that 9531 * based on the device struct. 9532 * 9533 * On systems that are not supported, we assume 9534 * the primary as most of the ACPI calls fail 9535 * with "Any Battery" as the parameter. 9536 */ 9537 if (battery_info.individual_addressing) 9538 /* BAT_PRIMARY or BAT_SECONDARY */ 9539 battery = tpacpi_battery_get_id(supply->desc->name); 9540 else 9541 battery = BAT_PRIMARY; 9542 9543 rval = kstrtoul(buf, 10, &value); 9544 if (rval) 9545 return rval; 9546 9547 switch (what) { 9548 case THRESHOLD_START: 9549 if (!battery_info.batteries[battery].start_support) 9550 return -ENODEV; 9551 /* valid values are [0, 99] */ 9552 if (value < 0 || value > 99) 9553 return -EINVAL; 9554 if (value > battery_info.batteries[battery].charge_stop) 9555 return -EINVAL; 9556 if (tpacpi_battery_set(THRESHOLD_START, battery, value)) 9557 return -ENODEV; 9558 battery_info.batteries[battery].charge_start = value; 9559 return count; 9560 9561 case THRESHOLD_STOP: 9562 if (!battery_info.batteries[battery].stop_support) 9563 return -ENODEV; 9564 /* valid values are [1, 100] */ 9565 if (value < 1 || value > 100) 9566 return -EINVAL; 9567 if (value < battery_info.batteries[battery].charge_start) 9568 return -EINVAL; 9569 battery_info.batteries[battery].charge_stop = value; 9570 /* 9571 * When 100 is passed to stop, we need to flip 9572 * it to 0 as that the EC understands that as 9573 * "Default", which will charge to 100% 9574 */ 9575 if (value == 100) 9576 value = 0; 9577 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value)) 9578 return -EINVAL; 9579 return count; 9580 default: 9581 pr_crit("Wrong parameter: %d", what); 9582 return -EINVAL; 9583 } 9584 return count; 9585 } 9586 9587 static ssize_t tpacpi_battery_show(int what, 9588 struct device *dev, 9589 char *buf) 9590 { 9591 struct power_supply *supply = to_power_supply(dev); 9592 int ret, battery; 9593 /* 9594 * Some systems have support for more than 9595 * one battery. If that is the case, 9596 * tpacpi_battery_probe marked that addressing 9597 * them individually is supported, so we; 9598 * based on the device struct. 9599 * 9600 * On systems that are not supported, we assume 9601 * the primary as most of the ACPI calls fail 9602 * with "Any Battery" as the parameter. 9603 */ 9604 if (battery_info.individual_addressing) 9605 /* BAT_PRIMARY or BAT_SECONDARY */ 9606 battery = tpacpi_battery_get_id(supply->desc->name); 9607 else 9608 battery = BAT_PRIMARY; 9609 if (tpacpi_battery_get(what, battery, &ret)) 9610 return -ENODEV; 9611 return sprintf(buf, "%d\n", ret); 9612 } 9613 9614 static ssize_t charge_start_threshold_show(struct device *device, 9615 struct device_attribute *attr, 9616 char *buf) 9617 { 9618 return tpacpi_battery_show(THRESHOLD_START, device, buf); 9619 } 9620 9621 static ssize_t charge_stop_threshold_show(struct device *device, 9622 struct device_attribute *attr, 9623 char *buf) 9624 { 9625 return tpacpi_battery_show(THRESHOLD_STOP, device, buf); 9626 } 9627 9628 static ssize_t charge_start_threshold_store(struct device *dev, 9629 struct device_attribute *attr, 9630 const char *buf, size_t count) 9631 { 9632 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count); 9633 } 9634 9635 static ssize_t charge_stop_threshold_store(struct device *dev, 9636 struct device_attribute *attr, 9637 const char *buf, size_t count) 9638 { 9639 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count); 9640 } 9641 9642 static DEVICE_ATTR_RW(charge_start_threshold); 9643 static DEVICE_ATTR_RW(charge_stop_threshold); 9644 9645 static struct attribute *tpacpi_battery_attrs[] = { 9646 &dev_attr_charge_start_threshold.attr, 9647 &dev_attr_charge_stop_threshold.attr, 9648 NULL, 9649 }; 9650 9651 ATTRIBUTE_GROUPS(tpacpi_battery); 9652 9653 /* ACPI battery hooking */ 9654 9655 static int tpacpi_battery_add(struct power_supply *battery) 9656 { 9657 int batteryid = tpacpi_battery_get_id(battery->desc->name); 9658 9659 if (tpacpi_battery_probe(batteryid)) 9660 return -ENODEV; 9661 if (device_add_groups(&battery->dev, tpacpi_battery_groups)) 9662 return -ENODEV; 9663 return 0; 9664 } 9665 9666 static int tpacpi_battery_remove(struct power_supply *battery) 9667 { 9668 device_remove_groups(&battery->dev, tpacpi_battery_groups); 9669 return 0; 9670 } 9671 9672 static struct acpi_battery_hook battery_hook = { 9673 .add_battery = tpacpi_battery_add, 9674 .remove_battery = tpacpi_battery_remove, 9675 .name = "ThinkPad Battery Extension", 9676 }; 9677 9678 /* Subdriver init/exit */ 9679 9680 static const struct tpacpi_quirk battery_quirk_table[] __initconst = { 9681 /* 9682 * Individual addressing is broken on models that expose the 9683 * primary battery as BAT1. 9684 */ 9685 TPACPI_Q_LNV('J', '7', true), /* B5400 */ 9686 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */ 9687 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */ 9688 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */ 9689 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */ 9690 }; 9691 9692 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm) 9693 { 9694 memset(&battery_info, 0, sizeof(battery_info)); 9695 9696 tp_features.battery_force_primary = tpacpi_check_quirks( 9697 battery_quirk_table, 9698 ARRAY_SIZE(battery_quirk_table)); 9699 9700 battery_hook_register(&battery_hook); 9701 return 0; 9702 } 9703 9704 static void tpacpi_battery_exit(void) 9705 { 9706 battery_hook_unregister(&battery_hook); 9707 } 9708 9709 static struct ibm_struct battery_driver_data = { 9710 .name = "battery", 9711 .exit = tpacpi_battery_exit, 9712 }; 9713 9714 /************************************************************************* 9715 * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature 9716 */ 9717 9718 static int lcdshadow_state; 9719 9720 static int lcdshadow_on_off(bool state) 9721 { 9722 acpi_handle set_shadow_handle; 9723 int output; 9724 9725 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSSS", &set_shadow_handle))) { 9726 pr_warn("Thinkpad ACPI has no %s interface.\n", "SSSS"); 9727 return -EIO; 9728 } 9729 9730 if (!acpi_evalf(set_shadow_handle, &output, NULL, "dd", (int)state)) 9731 return -EIO; 9732 9733 lcdshadow_state = state; 9734 return 0; 9735 } 9736 9737 static int lcdshadow_set(bool on) 9738 { 9739 if (lcdshadow_state < 0) 9740 return lcdshadow_state; 9741 if (lcdshadow_state == on) 9742 return 0; 9743 return lcdshadow_on_off(on); 9744 } 9745 9746 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm) 9747 { 9748 acpi_handle get_shadow_handle; 9749 int output; 9750 9751 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSSS", &get_shadow_handle))) { 9752 lcdshadow_state = -ENODEV; 9753 return 0; 9754 } 9755 9756 if (!acpi_evalf(get_shadow_handle, &output, NULL, "dd", 0)) { 9757 lcdshadow_state = -EIO; 9758 return -EIO; 9759 } 9760 if (!(output & 0x10000)) { 9761 lcdshadow_state = -ENODEV; 9762 return 0; 9763 } 9764 lcdshadow_state = output & 0x1; 9765 9766 return 0; 9767 } 9768 9769 static void lcdshadow_resume(void) 9770 { 9771 if (lcdshadow_state >= 0) 9772 lcdshadow_on_off(lcdshadow_state); 9773 } 9774 9775 static int lcdshadow_read(struct seq_file *m) 9776 { 9777 if (lcdshadow_state < 0) { 9778 seq_puts(m, "status:\t\tnot supported\n"); 9779 } else { 9780 seq_printf(m, "status:\t\t%d\n", lcdshadow_state); 9781 seq_puts(m, "commands:\t0, 1\n"); 9782 } 9783 9784 return 0; 9785 } 9786 9787 static int lcdshadow_write(char *buf) 9788 { 9789 char *cmd; 9790 int state = -1; 9791 9792 if (lcdshadow_state < 0) 9793 return -ENODEV; 9794 9795 while ((cmd = next_cmd(&buf))) { 9796 if (strlencmp(cmd, "0") == 0) 9797 state = 0; 9798 else if (strlencmp(cmd, "1") == 0) 9799 state = 1; 9800 } 9801 9802 if (state == -1) 9803 return -EINVAL; 9804 9805 return lcdshadow_set(state); 9806 } 9807 9808 static struct ibm_struct lcdshadow_driver_data = { 9809 .name = "lcdshadow", 9810 .resume = lcdshadow_resume, 9811 .read = lcdshadow_read, 9812 .write = lcdshadow_write, 9813 }; 9814 9815 /**************************************************************************** 9816 **************************************************************************** 9817 * 9818 * Infrastructure 9819 * 9820 **************************************************************************** 9821 ****************************************************************************/ 9822 9823 /* 9824 * HKEY event callout for other subdrivers go here 9825 * (yes, it is ugly, but it is quick, safe, and gets the job done 9826 */ 9827 static void tpacpi_driver_event(const unsigned int hkey_event) 9828 { 9829 if (ibm_backlight_device) { 9830 switch (hkey_event) { 9831 case TP_HKEY_EV_BRGHT_UP: 9832 case TP_HKEY_EV_BRGHT_DOWN: 9833 tpacpi_brightness_notify_change(); 9834 } 9835 } 9836 if (alsa_card) { 9837 switch (hkey_event) { 9838 case TP_HKEY_EV_VOL_UP: 9839 case TP_HKEY_EV_VOL_DOWN: 9840 case TP_HKEY_EV_VOL_MUTE: 9841 volume_alsa_notify_change(); 9842 } 9843 } 9844 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) { 9845 enum led_brightness brightness; 9846 9847 mutex_lock(&kbdlight_mutex); 9848 9849 /* 9850 * Check the brightness actually changed, setting the brightness 9851 * through kbdlight_set_level() also triggers this event. 9852 */ 9853 brightness = kbdlight_sysfs_get(NULL); 9854 if (kbdlight_brightness != brightness) { 9855 kbdlight_brightness = brightness; 9856 led_classdev_notify_brightness_hw_changed( 9857 &tpacpi_led_kbdlight.led_classdev, brightness); 9858 } 9859 9860 mutex_unlock(&kbdlight_mutex); 9861 } 9862 } 9863 9864 static void hotkey_driver_event(const unsigned int scancode) 9865 { 9866 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9867 } 9868 9869 /* --------------------------------------------------------------------- */ 9870 9871 /* /proc support */ 9872 static struct proc_dir_entry *proc_dir; 9873 9874 /* 9875 * Module and infrastructure proble, init and exit handling 9876 */ 9877 9878 static bool force_load; 9879 9880 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9881 static const char * __init str_supported(int is_supported) 9882 { 9883 static char text_unsupported[] __initdata = "not supported"; 9884 9885 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9886 } 9887 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9888 9889 static void ibm_exit(struct ibm_struct *ibm) 9890 { 9891 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9892 9893 list_del_init(&ibm->all_drivers); 9894 9895 if (ibm->flags.acpi_notify_installed) { 9896 dbg_printk(TPACPI_DBG_EXIT, 9897 "%s: acpi_remove_notify_handler\n", ibm->name); 9898 BUG_ON(!ibm->acpi); 9899 acpi_remove_notify_handler(*ibm->acpi->handle, 9900 ibm->acpi->type, 9901 dispatch_acpi_notify); 9902 ibm->flags.acpi_notify_installed = 0; 9903 } 9904 9905 if (ibm->flags.proc_created) { 9906 dbg_printk(TPACPI_DBG_EXIT, 9907 "%s: remove_proc_entry\n", ibm->name); 9908 remove_proc_entry(ibm->name, proc_dir); 9909 ibm->flags.proc_created = 0; 9910 } 9911 9912 if (ibm->flags.acpi_driver_registered) { 9913 dbg_printk(TPACPI_DBG_EXIT, 9914 "%s: acpi_bus_unregister_driver\n", ibm->name); 9915 BUG_ON(!ibm->acpi); 9916 acpi_bus_unregister_driver(ibm->acpi->driver); 9917 kfree(ibm->acpi->driver); 9918 ibm->acpi->driver = NULL; 9919 ibm->flags.acpi_driver_registered = 0; 9920 } 9921 9922 if (ibm->flags.init_called && ibm->exit) { 9923 ibm->exit(); 9924 ibm->flags.init_called = 0; 9925 } 9926 9927 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9928 } 9929 9930 static int __init ibm_init(struct ibm_init_struct *iibm) 9931 { 9932 int ret; 9933 struct ibm_struct *ibm = iibm->data; 9934 struct proc_dir_entry *entry; 9935 9936 BUG_ON(ibm == NULL); 9937 9938 INIT_LIST_HEAD(&ibm->all_drivers); 9939 9940 if (ibm->flags.experimental && !experimental) 9941 return 0; 9942 9943 dbg_printk(TPACPI_DBG_INIT, 9944 "probing for %s\n", ibm->name); 9945 9946 if (iibm->init) { 9947 ret = iibm->init(iibm); 9948 if (ret > 0) 9949 return 0; /* probe failed */ 9950 if (ret) 9951 return ret; 9952 9953 ibm->flags.init_called = 1; 9954 } 9955 9956 if (ibm->acpi) { 9957 if (ibm->acpi->hid) { 9958 ret = register_tpacpi_subdriver(ibm); 9959 if (ret) 9960 goto err_out; 9961 } 9962 9963 if (ibm->acpi->notify) { 9964 ret = setup_acpi_notify(ibm); 9965 if (ret == -ENODEV) { 9966 pr_notice("disabling subdriver %s\n", 9967 ibm->name); 9968 ret = 0; 9969 goto err_out; 9970 } 9971 if (ret < 0) 9972 goto err_out; 9973 } 9974 } 9975 9976 dbg_printk(TPACPI_DBG_INIT, 9977 "%s installed\n", ibm->name); 9978 9979 if (ibm->read) { 9980 umode_t mode = iibm->base_procfs_mode; 9981 9982 if (!mode) 9983 mode = S_IRUGO; 9984 if (ibm->write) 9985 mode |= S_IWUSR; 9986 entry = proc_create_data(ibm->name, mode, proc_dir, 9987 &dispatch_proc_fops, ibm); 9988 if (!entry) { 9989 pr_err("unable to create proc entry %s\n", ibm->name); 9990 ret = -ENODEV; 9991 goto err_out; 9992 } 9993 ibm->flags.proc_created = 1; 9994 } 9995 9996 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9997 9998 return 0; 9999 10000 err_out: 10001 dbg_printk(TPACPI_DBG_INIT, 10002 "%s: at error exit path with result %d\n", 10003 ibm->name, ret); 10004 10005 ibm_exit(ibm); 10006 return (ret < 0) ? ret : 0; 10007 } 10008 10009 /* Probing */ 10010 10011 static char __init tpacpi_parse_fw_id(const char * const s, 10012 u32 *model, u16 *release) 10013 { 10014 int i; 10015 10016 if (!s || strlen(s) < 8) 10017 goto invalid; 10018 10019 for (i = 0; i < 8; i++) 10020 if (!((s[i] >= '0' && s[i] <= '9') || 10021 (s[i] >= 'A' && s[i] <= 'Z'))) 10022 goto invalid; 10023 10024 /* 10025 * Most models: xxyTkkWW (#.##c) 10026 * Ancient 570/600 and -SL lacks (#.##c) 10027 */ 10028 if (s[3] == 'T' || s[3] == 'N') { 10029 *model = TPID(s[0], s[1]); 10030 *release = TPVER(s[4], s[5]); 10031 return s[2]; 10032 10033 /* New models: xxxyTkkW (#.##c); T550 and some others */ 10034 } else if (s[4] == 'T' || s[4] == 'N') { 10035 *model = TPID3(s[0], s[1], s[2]); 10036 *release = TPVER(s[5], s[6]); 10037 return s[3]; 10038 } 10039 10040 invalid: 10041 return '\0'; 10042 } 10043 10044 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private) 10045 { 10046 char *ec_fw_string = (char *) private; 10047 const char *dmi_data = (const char *)dm; 10048 /* 10049 * ThinkPad Embedded Controller Program Table on newer models 10050 * 10051 * Offset | Name | Width | Description 10052 * ---------------------------------------------------- 10053 * 0x00 | Type | BYTE | 0x8C 10054 * 0x01 | Length | BYTE | 10055 * 0x02 | Handle | WORD | Varies 10056 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO" 10057 * 0x0A | OEM struct offset | BYTE | 0x0B 10058 * 0x0B | OEM struct number | BYTE | 0x07, for this structure 10059 * 0x0C | OEM struct revision | BYTE | 0x01, for this format 10060 * 0x0D | ECP version ID | STR ID | 10061 * 0x0E | ECP release date | STR ID | 10062 */ 10063 10064 /* Return if data structure not match */ 10065 if (dm->type != 140 || dm->length < 0x0F || 10066 memcmp(dmi_data + 4, "LENOVO", 6) != 0 || 10067 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 || 10068 dmi_data[0x0C] != 0x01) 10069 return; 10070 10071 /* fwstr is the first 8byte string */ 10072 strncpy(ec_fw_string, dmi_data + 0x0F, 8); 10073 } 10074 10075 /* returns 0 - probe ok, or < 0 - probe error. 10076 * Probe ok doesn't mean thinkpad found. 10077 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 10078 static int __must_check __init get_thinkpad_model_data( 10079 struct thinkpad_id_data *tp) 10080 { 10081 const struct dmi_device *dev = NULL; 10082 char ec_fw_string[18] = {0}; 10083 char const *s; 10084 char t; 10085 10086 if (!tp) 10087 return -EINVAL; 10088 10089 memset(tp, 0, sizeof(*tp)); 10090 10091 if (dmi_name_in_vendors("IBM")) 10092 tp->vendor = PCI_VENDOR_ID_IBM; 10093 else if (dmi_name_in_vendors("LENOVO")) 10094 tp->vendor = PCI_VENDOR_ID_LENOVO; 10095 else 10096 return 0; 10097 10098 s = dmi_get_system_info(DMI_BIOS_VERSION); 10099 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 10100 if (s && !tp->bios_version_str) 10101 return -ENOMEM; 10102 10103 /* Really ancient ThinkPad 240X will fail this, which is fine */ 10104 t = tpacpi_parse_fw_id(tp->bios_version_str, 10105 &tp->bios_model, &tp->bios_release); 10106 if (t != 'E' && t != 'C') 10107 return 0; 10108 10109 /* 10110 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 10111 * X32 or newer, all Z series; Some models must have an 10112 * up-to-date BIOS or they will not be detected. 10113 * 10114 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10115 */ 10116 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 10117 if (sscanf(dev->name, 10118 "IBM ThinkPad Embedded Controller -[%17c", 10119 ec_fw_string) == 1) { 10120 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 10121 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 10122 break; 10123 } 10124 } 10125 10126 /* Newer ThinkPads have different EC program info table */ 10127 if (!ec_fw_string[0]) 10128 dmi_walk(find_new_ec_fwstr, &ec_fw_string); 10129 10130 if (ec_fw_string[0]) { 10131 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 10132 if (!tp->ec_version_str) 10133 return -ENOMEM; 10134 10135 t = tpacpi_parse_fw_id(ec_fw_string, 10136 &tp->ec_model, &tp->ec_release); 10137 if (t != 'H') { 10138 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n", 10139 ec_fw_string); 10140 pr_notice("please report this to %s\n", TPACPI_MAIL); 10141 } 10142 } 10143 10144 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 10145 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 10146 tp->model_str = kstrdup(s, GFP_KERNEL); 10147 if (!tp->model_str) 10148 return -ENOMEM; 10149 } else { 10150 s = dmi_get_system_info(DMI_BIOS_VENDOR); 10151 if (s && !(strncasecmp(s, "Lenovo", 6))) { 10152 tp->model_str = kstrdup(s, GFP_KERNEL); 10153 if (!tp->model_str) 10154 return -ENOMEM; 10155 } 10156 } 10157 10158 s = dmi_get_system_info(DMI_PRODUCT_NAME); 10159 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 10160 if (s && !tp->nummodel_str) 10161 return -ENOMEM; 10162 10163 return 0; 10164 } 10165 10166 static int __init probe_for_thinkpad(void) 10167 { 10168 int is_thinkpad; 10169 10170 if (acpi_disabled) 10171 return -ENODEV; 10172 10173 /* It would be dangerous to run the driver in this case */ 10174 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 10175 return -ENODEV; 10176 10177 /* 10178 * Non-ancient models have better DMI tagging, but very old models 10179 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 10180 */ 10181 is_thinkpad = (thinkpad_id.model_str != NULL) || 10182 (thinkpad_id.ec_model != 0) || 10183 tpacpi_is_fw_known(); 10184 10185 /* The EC handler is required */ 10186 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 10187 if (!ec_handle) { 10188 if (is_thinkpad) 10189 pr_err("Not yet supported ThinkPad detected!\n"); 10190 return -ENODEV; 10191 } 10192 10193 if (!is_thinkpad && !force_load) 10194 return -ENODEV; 10195 10196 return 0; 10197 } 10198 10199 static void __init thinkpad_acpi_init_banner(void) 10200 { 10201 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 10202 pr_info("%s\n", TPACPI_URL); 10203 10204 pr_info("ThinkPad BIOS %s, EC %s\n", 10205 (thinkpad_id.bios_version_str) ? 10206 thinkpad_id.bios_version_str : "unknown", 10207 (thinkpad_id.ec_version_str) ? 10208 thinkpad_id.ec_version_str : "unknown"); 10209 10210 BUG_ON(!thinkpad_id.vendor); 10211 10212 if (thinkpad_id.model_str) 10213 pr_info("%s %s, model %s\n", 10214 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 10215 "IBM" : ((thinkpad_id.vendor == 10216 PCI_VENDOR_ID_LENOVO) ? 10217 "Lenovo" : "Unknown vendor"), 10218 thinkpad_id.model_str, 10219 (thinkpad_id.nummodel_str) ? 10220 thinkpad_id.nummodel_str : "unknown"); 10221 } 10222 10223 /* Module init, exit, parameters */ 10224 10225 static struct ibm_init_struct ibms_init[] __initdata = { 10226 { 10227 .data = &thinkpad_acpi_driver_data, 10228 }, 10229 { 10230 .init = hotkey_init, 10231 .data = &hotkey_driver_data, 10232 }, 10233 { 10234 .init = bluetooth_init, 10235 .data = &bluetooth_driver_data, 10236 }, 10237 { 10238 .init = wan_init, 10239 .data = &wan_driver_data, 10240 }, 10241 { 10242 .init = uwb_init, 10243 .data = &uwb_driver_data, 10244 }, 10245 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 10246 { 10247 .init = video_init, 10248 .base_procfs_mode = S_IRUSR, 10249 .data = &video_driver_data, 10250 }, 10251 #endif 10252 { 10253 .init = kbdlight_init, 10254 .data = &kbdlight_driver_data, 10255 }, 10256 { 10257 .init = light_init, 10258 .data = &light_driver_data, 10259 }, 10260 { 10261 .init = cmos_init, 10262 .data = &cmos_driver_data, 10263 }, 10264 { 10265 .init = led_init, 10266 .data = &led_driver_data, 10267 }, 10268 { 10269 .init = beep_init, 10270 .data = &beep_driver_data, 10271 }, 10272 { 10273 .init = thermal_init, 10274 .data = &thermal_driver_data, 10275 }, 10276 { 10277 .init = brightness_init, 10278 .data = &brightness_driver_data, 10279 }, 10280 { 10281 .init = volume_init, 10282 .data = &volume_driver_data, 10283 }, 10284 { 10285 .init = fan_init, 10286 .data = &fan_driver_data, 10287 }, 10288 { 10289 .init = mute_led_init, 10290 .data = &mute_led_driver_data, 10291 }, 10292 { 10293 .init = tpacpi_battery_init, 10294 .data = &battery_driver_data, 10295 }, 10296 { 10297 .init = tpacpi_lcdshadow_init, 10298 .data = &lcdshadow_driver_data, 10299 }, 10300 }; 10301 10302 static int __init set_ibm_param(const char *val, const struct kernel_param *kp) 10303 { 10304 unsigned int i; 10305 struct ibm_struct *ibm; 10306 10307 if (!kp || !kp->name || !val) 10308 return -EINVAL; 10309 10310 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10311 ibm = ibms_init[i].data; 10312 WARN_ON(ibm == NULL); 10313 10314 if (!ibm || !ibm->name) 10315 continue; 10316 10317 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 10318 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 10319 return -ENOSPC; 10320 strcpy(ibms_init[i].param, val); 10321 strcat(ibms_init[i].param, ","); 10322 return 0; 10323 } 10324 } 10325 10326 return -EINVAL; 10327 } 10328 10329 module_param(experimental, int, 0444); 10330 MODULE_PARM_DESC(experimental, 10331 "Enables experimental features when non-zero"); 10332 10333 module_param_named(debug, dbg_level, uint, 0); 10334 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 10335 10336 module_param(force_load, bool, 0444); 10337 MODULE_PARM_DESC(force_load, 10338 "Attempts to load the driver even on a mis-identified ThinkPad when true"); 10339 10340 module_param_named(fan_control, fan_control_allowed, bool, 0444); 10341 MODULE_PARM_DESC(fan_control, 10342 "Enables setting fan parameters features when true"); 10343 10344 module_param_named(brightness_mode, brightness_mode, uint, 0444); 10345 MODULE_PARM_DESC(brightness_mode, 10346 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 10347 10348 module_param(brightness_enable, uint, 0444); 10349 MODULE_PARM_DESC(brightness_enable, 10350 "Enables backlight control when 1, disables when 0"); 10351 10352 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 10353 module_param_named(volume_mode, volume_mode, uint, 0444); 10354 MODULE_PARM_DESC(volume_mode, 10355 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 10356 10357 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 10358 MODULE_PARM_DESC(volume_capabilities, 10359 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only"); 10360 10361 module_param_named(volume_control, volume_control_allowed, bool, 0444); 10362 MODULE_PARM_DESC(volume_control, 10363 "Enables software override for the console audio control when true"); 10364 10365 module_param_named(software_mute, software_mute_requested, bool, 0444); 10366 MODULE_PARM_DESC(software_mute, 10367 "Request full software mute control"); 10368 10369 /* ALSA module API parameters */ 10370 module_param_named(index, alsa_index, int, 0444); 10371 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 10372 module_param_named(id, alsa_id, charp, 0444); 10373 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 10374 module_param_named(enable, alsa_enable, bool, 0444); 10375 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 10376 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 10377 10378 /* The module parameter can't be read back, that's why 0 is used here */ 10379 #define TPACPI_PARAM(feature) \ 10380 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 10381 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation") 10382 10383 TPACPI_PARAM(hotkey); 10384 TPACPI_PARAM(bluetooth); 10385 TPACPI_PARAM(video); 10386 TPACPI_PARAM(light); 10387 TPACPI_PARAM(cmos); 10388 TPACPI_PARAM(led); 10389 TPACPI_PARAM(beep); 10390 TPACPI_PARAM(brightness); 10391 TPACPI_PARAM(volume); 10392 TPACPI_PARAM(fan); 10393 10394 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10395 module_param(dbg_wlswemul, uint, 0444); 10396 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 10397 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 10398 MODULE_PARM_DESC(wlsw_state, 10399 "Initial state of the emulated WLSW switch"); 10400 10401 module_param(dbg_bluetoothemul, uint, 0444); 10402 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 10403 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 10404 MODULE_PARM_DESC(bluetooth_state, 10405 "Initial state of the emulated bluetooth switch"); 10406 10407 module_param(dbg_wwanemul, uint, 0444); 10408 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 10409 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 10410 MODULE_PARM_DESC(wwan_state, 10411 "Initial state of the emulated WWAN switch"); 10412 10413 module_param(dbg_uwbemul, uint, 0444); 10414 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 10415 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 10416 MODULE_PARM_DESC(uwb_state, 10417 "Initial state of the emulated UWB switch"); 10418 #endif 10419 10420 static void thinkpad_acpi_module_exit(void) 10421 { 10422 struct ibm_struct *ibm, *itmp; 10423 10424 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 10425 10426 list_for_each_entry_safe_reverse(ibm, itmp, 10427 &tpacpi_all_drivers, 10428 all_drivers) { 10429 ibm_exit(ibm); 10430 } 10431 10432 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 10433 10434 if (tpacpi_inputdev) { 10435 if (tp_features.input_device_registered) 10436 input_unregister_device(tpacpi_inputdev); 10437 else 10438 input_free_device(tpacpi_inputdev); 10439 kfree(hotkey_keycode_map); 10440 } 10441 10442 if (tpacpi_hwmon) 10443 hwmon_device_unregister(tpacpi_hwmon); 10444 10445 if (tpacpi_sensors_pdev) 10446 platform_device_unregister(tpacpi_sensors_pdev); 10447 if (tpacpi_pdev) 10448 platform_device_unregister(tpacpi_pdev); 10449 10450 if (tp_features.sensors_pdrv_attrs_registered) 10451 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 10452 if (tp_features.platform_drv_attrs_registered) 10453 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 10454 10455 if (tp_features.sensors_pdrv_registered) 10456 platform_driver_unregister(&tpacpi_hwmon_pdriver); 10457 10458 if (tp_features.platform_drv_registered) 10459 platform_driver_unregister(&tpacpi_pdriver); 10460 10461 if (proc_dir) 10462 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 10463 10464 if (tpacpi_wq) 10465 destroy_workqueue(tpacpi_wq); 10466 10467 kfree(thinkpad_id.bios_version_str); 10468 kfree(thinkpad_id.ec_version_str); 10469 kfree(thinkpad_id.model_str); 10470 kfree(thinkpad_id.nummodel_str); 10471 } 10472 10473 10474 static int __init thinkpad_acpi_module_init(void) 10475 { 10476 int ret, i; 10477 10478 tpacpi_lifecycle = TPACPI_LIFE_INIT; 10479 10480 /* Driver-level probe */ 10481 10482 ret = get_thinkpad_model_data(&thinkpad_id); 10483 if (ret) { 10484 pr_err("unable to get DMI data: %d\n", ret); 10485 thinkpad_acpi_module_exit(); 10486 return ret; 10487 } 10488 ret = probe_for_thinkpad(); 10489 if (ret) { 10490 thinkpad_acpi_module_exit(); 10491 return ret; 10492 } 10493 10494 /* Driver initialization */ 10495 10496 thinkpad_acpi_init_banner(); 10497 tpacpi_check_outdated_fw(); 10498 10499 TPACPI_ACPIHANDLE_INIT(ecrd); 10500 TPACPI_ACPIHANDLE_INIT(ecwr); 10501 10502 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 10503 if (!tpacpi_wq) { 10504 thinkpad_acpi_module_exit(); 10505 return -ENOMEM; 10506 } 10507 10508 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 10509 if (!proc_dir) { 10510 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 10511 thinkpad_acpi_module_exit(); 10512 return -ENODEV; 10513 } 10514 10515 ret = platform_driver_register(&tpacpi_pdriver); 10516 if (ret) { 10517 pr_err("unable to register main platform driver\n"); 10518 thinkpad_acpi_module_exit(); 10519 return ret; 10520 } 10521 tp_features.platform_drv_registered = 1; 10522 10523 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 10524 if (ret) { 10525 pr_err("unable to register hwmon platform driver\n"); 10526 thinkpad_acpi_module_exit(); 10527 return ret; 10528 } 10529 tp_features.sensors_pdrv_registered = 1; 10530 10531 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 10532 if (!ret) { 10533 tp_features.platform_drv_attrs_registered = 1; 10534 ret = tpacpi_create_driver_attributes( 10535 &tpacpi_hwmon_pdriver.driver); 10536 } 10537 if (ret) { 10538 pr_err("unable to create sysfs driver attributes\n"); 10539 thinkpad_acpi_module_exit(); 10540 return ret; 10541 } 10542 tp_features.sensors_pdrv_attrs_registered = 1; 10543 10544 10545 /* Device initialization */ 10546 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 10547 NULL, 0); 10548 if (IS_ERR(tpacpi_pdev)) { 10549 ret = PTR_ERR(tpacpi_pdev); 10550 tpacpi_pdev = NULL; 10551 pr_err("unable to register platform device\n"); 10552 thinkpad_acpi_module_exit(); 10553 return ret; 10554 } 10555 tpacpi_sensors_pdev = platform_device_register_simple( 10556 TPACPI_HWMON_DRVR_NAME, 10557 -1, NULL, 0); 10558 if (IS_ERR(tpacpi_sensors_pdev)) { 10559 ret = PTR_ERR(tpacpi_sensors_pdev); 10560 tpacpi_sensors_pdev = NULL; 10561 pr_err("unable to register hwmon platform device\n"); 10562 thinkpad_acpi_module_exit(); 10563 return ret; 10564 } 10565 tp_features.sensors_pdev_attrs_registered = 1; 10566 tpacpi_hwmon = hwmon_device_register_with_groups( 10567 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL); 10568 10569 if (IS_ERR(tpacpi_hwmon)) { 10570 ret = PTR_ERR(tpacpi_hwmon); 10571 tpacpi_hwmon = NULL; 10572 pr_err("unable to register hwmon device\n"); 10573 thinkpad_acpi_module_exit(); 10574 return ret; 10575 } 10576 mutex_init(&tpacpi_inputdev_send_mutex); 10577 tpacpi_inputdev = input_allocate_device(); 10578 if (!tpacpi_inputdev) { 10579 thinkpad_acpi_module_exit(); 10580 return -ENOMEM; 10581 } else { 10582 /* Prepare input device, but don't register */ 10583 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 10584 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 10585 tpacpi_inputdev->id.bustype = BUS_HOST; 10586 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 10587 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 10588 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 10589 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 10590 } 10591 10592 /* Init subdriver dependencies */ 10593 tpacpi_detect_brightness_capabilities(); 10594 10595 /* Init subdrivers */ 10596 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10597 ret = ibm_init(&ibms_init[i]); 10598 if (ret >= 0 && *ibms_init[i].param) 10599 ret = ibms_init[i].data->write(ibms_init[i].param); 10600 if (ret < 0) { 10601 thinkpad_acpi_module_exit(); 10602 return ret; 10603 } 10604 } 10605 10606 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 10607 10608 ret = input_register_device(tpacpi_inputdev); 10609 if (ret < 0) { 10610 pr_err("unable to register input device\n"); 10611 thinkpad_acpi_module_exit(); 10612 return ret; 10613 } else { 10614 tp_features.input_device_registered = 1; 10615 } 10616 10617 return 0; 10618 } 10619 10620 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 10621 10622 /* 10623 * This will autoload the driver in almost every ThinkPad 10624 * in widespread use. 10625 * 10626 * Only _VERY_ old models, like the 240, 240x and 570 lack 10627 * the HKEY event interface. 10628 */ 10629 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 10630 10631 /* 10632 * DMI matching for module autoloading 10633 * 10634 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10635 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 10636 * 10637 * Only models listed in thinkwiki will be supported, so add yours 10638 * if it is not there yet. 10639 */ 10640 #define IBM_BIOS_MODULE_ALIAS(__type) \ 10641 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 10642 10643 /* Ancient thinkpad BIOSes have to be identified by 10644 * BIOS type or model number, and there are far less 10645 * BIOS types than model numbers... */ 10646 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 10647 10648 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 10649 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 10650 MODULE_DESCRIPTION(TPACPI_DESC); 10651 MODULE_VERSION(TPACPI_VERSION); 10652 MODULE_LICENSE("GPL"); 10653 10654 module_init(thinkpad_acpi_module_init); 10655 module_exit(thinkpad_acpi_module_exit); 10656