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 proc_ops dispatch_proc_ops = { 911 .proc_open = dispatch_proc_open, 912 .proc_read = seq_read, 913 .proc_lseek = seq_lseek, 914 .proc_release = single_release, 915 .proc_write = dispatch_proc_write, 916 }; 917 918 static char *next_cmd(char **cmds) 919 { 920 char *start = *cmds; 921 char *end; 922 923 while ((end = strchr(start, ',')) && end == start) 924 start = end + 1; 925 926 if (!end) 927 return NULL; 928 929 *end = 0; 930 *cmds = end + 1; 931 return start; 932 } 933 934 935 /**************************************************************************** 936 **************************************************************************** 937 * 938 * Device model: input, hwmon and platform 939 * 940 **************************************************************************** 941 ****************************************************************************/ 942 943 static struct platform_device *tpacpi_pdev; 944 static struct platform_device *tpacpi_sensors_pdev; 945 static struct device *tpacpi_hwmon; 946 static struct input_dev *tpacpi_inputdev; 947 static struct mutex tpacpi_inputdev_send_mutex; 948 static LIST_HEAD(tpacpi_all_drivers); 949 950 #ifdef CONFIG_PM_SLEEP 951 static int tpacpi_suspend_handler(struct device *dev) 952 { 953 struct ibm_struct *ibm, *itmp; 954 955 list_for_each_entry_safe(ibm, itmp, 956 &tpacpi_all_drivers, 957 all_drivers) { 958 if (ibm->suspend) 959 (ibm->suspend)(); 960 } 961 962 return 0; 963 } 964 965 static int tpacpi_resume_handler(struct device *dev) 966 { 967 struct ibm_struct *ibm, *itmp; 968 969 list_for_each_entry_safe(ibm, itmp, 970 &tpacpi_all_drivers, 971 all_drivers) { 972 if (ibm->resume) 973 (ibm->resume)(); 974 } 975 976 return 0; 977 } 978 #endif 979 980 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 981 tpacpi_suspend_handler, tpacpi_resume_handler); 982 983 static void tpacpi_shutdown_handler(struct platform_device *pdev) 984 { 985 struct ibm_struct *ibm, *itmp; 986 987 list_for_each_entry_safe(ibm, itmp, 988 &tpacpi_all_drivers, 989 all_drivers) { 990 if (ibm->shutdown) 991 (ibm->shutdown)(); 992 } 993 } 994 995 static struct platform_driver tpacpi_pdriver = { 996 .driver = { 997 .name = TPACPI_DRVR_NAME, 998 .pm = &tpacpi_pm, 999 }, 1000 .shutdown = tpacpi_shutdown_handler, 1001 }; 1002 1003 static struct platform_driver tpacpi_hwmon_pdriver = { 1004 .driver = { 1005 .name = TPACPI_HWMON_DRVR_NAME, 1006 }, 1007 }; 1008 1009 /************************************************************************* 1010 * sysfs support helpers 1011 */ 1012 1013 struct attribute_set { 1014 unsigned int members, max_members; 1015 struct attribute_group group; 1016 }; 1017 1018 struct attribute_set_obj { 1019 struct attribute_set s; 1020 struct attribute *a; 1021 } __attribute__((packed)); 1022 1023 static struct attribute_set *create_attr_set(unsigned int max_members, 1024 const char *name) 1025 { 1026 struct attribute_set_obj *sobj; 1027 1028 if (max_members == 0) 1029 return NULL; 1030 1031 /* Allocates space for implicit NULL at the end too */ 1032 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1033 max_members * sizeof(struct attribute *), 1034 GFP_KERNEL); 1035 if (!sobj) 1036 return NULL; 1037 sobj->s.max_members = max_members; 1038 sobj->s.group.attrs = &sobj->a; 1039 sobj->s.group.name = name; 1040 1041 return &sobj->s; 1042 } 1043 1044 #define destroy_attr_set(_set) \ 1045 kfree(_set); 1046 1047 /* not multi-threaded safe, use it in a single thread per set */ 1048 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1049 { 1050 if (!s || !attr) 1051 return -EINVAL; 1052 1053 if (s->members >= s->max_members) 1054 return -ENOMEM; 1055 1056 s->group.attrs[s->members] = attr; 1057 s->members++; 1058 1059 return 0; 1060 } 1061 1062 static int add_many_to_attr_set(struct attribute_set *s, 1063 struct attribute **attr, 1064 unsigned int count) 1065 { 1066 int i, res; 1067 1068 for (i = 0; i < count; i++) { 1069 res = add_to_attr_set(s, attr[i]); 1070 if (res) 1071 return res; 1072 } 1073 1074 return 0; 1075 } 1076 1077 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1078 { 1079 sysfs_remove_group(kobj, &s->group); 1080 destroy_attr_set(s); 1081 } 1082 1083 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1084 sysfs_create_group(_kobj, &_attr_set->group) 1085 1086 static int parse_strtoul(const char *buf, 1087 unsigned long max, unsigned long *value) 1088 { 1089 char *endp; 1090 1091 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1092 endp = skip_spaces(endp); 1093 if (*endp || *value > max) 1094 return -EINVAL; 1095 1096 return 0; 1097 } 1098 1099 static void tpacpi_disable_brightness_delay(void) 1100 { 1101 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1102 pr_notice("ACPI backlight control delay disabled\n"); 1103 } 1104 1105 static void printk_deprecated_attribute(const char * const what, 1106 const char * const details) 1107 { 1108 tpacpi_log_usertask("deprecated sysfs attribute"); 1109 pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n", 1110 what, details); 1111 } 1112 1113 /************************************************************************* 1114 * rfkill and radio control support helpers 1115 */ 1116 1117 /* 1118 * ThinkPad-ACPI firmware handling model: 1119 * 1120 * WLSW (master wireless switch) is event-driven, and is common to all 1121 * firmware-controlled radios. It cannot be controlled, just monitored, 1122 * as expected. It overrides all radio state in firmware 1123 * 1124 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1125 * (TODO: verify how WLSW interacts with the returned radio state). 1126 * 1127 * The only time there are shadow radio state changes, is when 1128 * masked-off hotkeys are used. 1129 */ 1130 1131 /* 1132 * Internal driver API for radio state: 1133 * 1134 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1135 * bool: true means radio blocked (off) 1136 */ 1137 enum tpacpi_rfkill_state { 1138 TPACPI_RFK_RADIO_OFF = 0, 1139 TPACPI_RFK_RADIO_ON 1140 }; 1141 1142 /* rfkill switches */ 1143 enum tpacpi_rfk_id { 1144 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1145 TPACPI_RFK_WWAN_SW_ID, 1146 TPACPI_RFK_UWB_SW_ID, 1147 TPACPI_RFK_SW_MAX 1148 }; 1149 1150 static const char *tpacpi_rfkill_names[] = { 1151 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1152 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1153 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1154 [TPACPI_RFK_SW_MAX] = NULL 1155 }; 1156 1157 /* ThinkPad-ACPI rfkill subdriver */ 1158 struct tpacpi_rfk { 1159 struct rfkill *rfkill; 1160 enum tpacpi_rfk_id id; 1161 const struct tpacpi_rfk_ops *ops; 1162 }; 1163 1164 struct tpacpi_rfk_ops { 1165 /* firmware interface */ 1166 int (*get_status)(void); 1167 int (*set_status)(const enum tpacpi_rfkill_state); 1168 }; 1169 1170 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1171 1172 /* Query FW and update rfkill sw state for a given rfkill switch */ 1173 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1174 { 1175 int status; 1176 1177 if (!tp_rfk) 1178 return -ENODEV; 1179 1180 status = (tp_rfk->ops->get_status)(); 1181 if (status < 0) 1182 return status; 1183 1184 rfkill_set_sw_state(tp_rfk->rfkill, 1185 (status == TPACPI_RFK_RADIO_OFF)); 1186 1187 return status; 1188 } 1189 1190 /* Query FW and update rfkill sw state for all rfkill switches */ 1191 static void tpacpi_rfk_update_swstate_all(void) 1192 { 1193 unsigned int i; 1194 1195 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1196 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1197 } 1198 1199 /* 1200 * Sync the HW-blocking state of all rfkill switches, 1201 * do notice it causes the rfkill core to schedule uevents 1202 */ 1203 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1204 { 1205 unsigned int i; 1206 struct tpacpi_rfk *tp_rfk; 1207 1208 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1209 tp_rfk = tpacpi_rfkill_switches[i]; 1210 if (tp_rfk) { 1211 if (rfkill_set_hw_state(tp_rfk->rfkill, 1212 blocked)) { 1213 /* ignore -- we track sw block */ 1214 } 1215 } 1216 } 1217 } 1218 1219 /* Call to get the WLSW state from the firmware */ 1220 static int hotkey_get_wlsw(void); 1221 1222 /* Call to query WLSW state and update all rfkill switches */ 1223 static bool tpacpi_rfk_check_hwblock_state(void) 1224 { 1225 int res = hotkey_get_wlsw(); 1226 int hw_blocked; 1227 1228 /* When unknown or unsupported, we have to assume it is unblocked */ 1229 if (res < 0) 1230 return false; 1231 1232 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1233 tpacpi_rfk_update_hwblock_state(hw_blocked); 1234 1235 return hw_blocked; 1236 } 1237 1238 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1239 { 1240 struct tpacpi_rfk *tp_rfk = data; 1241 int res; 1242 1243 dbg_printk(TPACPI_DBG_RFKILL, 1244 "request to change radio state to %s\n", 1245 blocked ? "blocked" : "unblocked"); 1246 1247 /* try to set radio state */ 1248 res = (tp_rfk->ops->set_status)(blocked ? 1249 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1250 1251 /* and update the rfkill core with whatever the FW really did */ 1252 tpacpi_rfk_update_swstate(tp_rfk); 1253 1254 return (res < 0) ? res : 0; 1255 } 1256 1257 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1258 .set_block = tpacpi_rfk_hook_set_block, 1259 }; 1260 1261 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1262 const struct tpacpi_rfk_ops *tp_rfkops, 1263 const enum rfkill_type rfktype, 1264 const char *name, 1265 const bool set_default) 1266 { 1267 struct tpacpi_rfk *atp_rfk; 1268 int res; 1269 bool sw_state = false; 1270 bool hw_state; 1271 int sw_status; 1272 1273 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1274 1275 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1276 if (atp_rfk) 1277 atp_rfk->rfkill = rfkill_alloc(name, 1278 &tpacpi_pdev->dev, 1279 rfktype, 1280 &tpacpi_rfk_rfkill_ops, 1281 atp_rfk); 1282 if (!atp_rfk || !atp_rfk->rfkill) { 1283 pr_err("failed to allocate memory for rfkill class\n"); 1284 kfree(atp_rfk); 1285 return -ENOMEM; 1286 } 1287 1288 atp_rfk->id = id; 1289 atp_rfk->ops = tp_rfkops; 1290 1291 sw_status = (tp_rfkops->get_status)(); 1292 if (sw_status < 0) { 1293 pr_err("failed to read initial state for %s, error %d\n", 1294 name, sw_status); 1295 } else { 1296 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1297 if (set_default) { 1298 /* try to keep the initial state, since we ask the 1299 * firmware to preserve it across S5 in NVRAM */ 1300 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1301 } 1302 } 1303 hw_state = tpacpi_rfk_check_hwblock_state(); 1304 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1305 1306 res = rfkill_register(atp_rfk->rfkill); 1307 if (res < 0) { 1308 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1309 rfkill_destroy(atp_rfk->rfkill); 1310 kfree(atp_rfk); 1311 return res; 1312 } 1313 1314 tpacpi_rfkill_switches[id] = atp_rfk; 1315 1316 pr_info("rfkill switch %s: radio is %sblocked\n", 1317 name, (sw_state || hw_state) ? "" : "un"); 1318 return 0; 1319 } 1320 1321 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1322 { 1323 struct tpacpi_rfk *tp_rfk; 1324 1325 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1326 1327 tp_rfk = tpacpi_rfkill_switches[id]; 1328 if (tp_rfk) { 1329 rfkill_unregister(tp_rfk->rfkill); 1330 rfkill_destroy(tp_rfk->rfkill); 1331 tpacpi_rfkill_switches[id] = NULL; 1332 kfree(tp_rfk); 1333 } 1334 } 1335 1336 static void printk_deprecated_rfkill_attribute(const char * const what) 1337 { 1338 printk_deprecated_attribute(what, 1339 "Please switch to generic rfkill before year 2010"); 1340 } 1341 1342 /* sysfs <radio> enable ------------------------------------------------ */ 1343 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1344 struct device_attribute *attr, 1345 char *buf) 1346 { 1347 int status; 1348 1349 printk_deprecated_rfkill_attribute(attr->attr.name); 1350 1351 /* This is in the ABI... */ 1352 if (tpacpi_rfk_check_hwblock_state()) { 1353 status = TPACPI_RFK_RADIO_OFF; 1354 } else { 1355 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1356 if (status < 0) 1357 return status; 1358 } 1359 1360 return snprintf(buf, PAGE_SIZE, "%d\n", 1361 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1362 } 1363 1364 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1365 struct device_attribute *attr, 1366 const char *buf, size_t count) 1367 { 1368 unsigned long t; 1369 int res; 1370 1371 printk_deprecated_rfkill_attribute(attr->attr.name); 1372 1373 if (parse_strtoul(buf, 1, &t)) 1374 return -EINVAL; 1375 1376 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1377 1378 /* This is in the ABI... */ 1379 if (tpacpi_rfk_check_hwblock_state() && !!t) 1380 return -EPERM; 1381 1382 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1383 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1384 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1385 1386 return (res < 0) ? res : count; 1387 } 1388 1389 /* procfs -------------------------------------------------------------- */ 1390 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1391 { 1392 if (id >= TPACPI_RFK_SW_MAX) 1393 seq_printf(m, "status:\t\tnot supported\n"); 1394 else { 1395 int status; 1396 1397 /* This is in the ABI... */ 1398 if (tpacpi_rfk_check_hwblock_state()) { 1399 status = TPACPI_RFK_RADIO_OFF; 1400 } else { 1401 status = tpacpi_rfk_update_swstate( 1402 tpacpi_rfkill_switches[id]); 1403 if (status < 0) 1404 return status; 1405 } 1406 1407 seq_printf(m, "status:\t\t%s\n", 1408 (status == TPACPI_RFK_RADIO_ON) ? 1409 "enabled" : "disabled"); 1410 seq_printf(m, "commands:\tenable, disable\n"); 1411 } 1412 1413 return 0; 1414 } 1415 1416 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1417 { 1418 char *cmd; 1419 int status = -1; 1420 int res = 0; 1421 1422 if (id >= TPACPI_RFK_SW_MAX) 1423 return -ENODEV; 1424 1425 while ((cmd = next_cmd(&buf))) { 1426 if (strlencmp(cmd, "enable") == 0) 1427 status = TPACPI_RFK_RADIO_ON; 1428 else if (strlencmp(cmd, "disable") == 0) 1429 status = TPACPI_RFK_RADIO_OFF; 1430 else 1431 return -EINVAL; 1432 } 1433 1434 if (status != -1) { 1435 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1436 (status == TPACPI_RFK_RADIO_ON) ? 1437 "enable" : "disable", 1438 tpacpi_rfkill_names[id]); 1439 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1440 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1441 } 1442 1443 return res; 1444 } 1445 1446 /************************************************************************* 1447 * thinkpad-acpi driver attributes 1448 */ 1449 1450 /* interface_version --------------------------------------------------- */ 1451 static ssize_t interface_version_show(struct device_driver *drv, char *buf) 1452 { 1453 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1454 } 1455 static DRIVER_ATTR_RO(interface_version); 1456 1457 /* debug_level --------------------------------------------------------- */ 1458 static ssize_t debug_level_show(struct device_driver *drv, char *buf) 1459 { 1460 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1461 } 1462 1463 static ssize_t debug_level_store(struct device_driver *drv, const char *buf, 1464 size_t count) 1465 { 1466 unsigned long t; 1467 1468 if (parse_strtoul(buf, 0xffff, &t)) 1469 return -EINVAL; 1470 1471 dbg_level = t; 1472 1473 return count; 1474 } 1475 static DRIVER_ATTR_RW(debug_level); 1476 1477 /* version ------------------------------------------------------------- */ 1478 static ssize_t version_show(struct device_driver *drv, char *buf) 1479 { 1480 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1481 TPACPI_DESC, TPACPI_VERSION); 1482 } 1483 static DRIVER_ATTR_RO(version); 1484 1485 /* --------------------------------------------------------------------- */ 1486 1487 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1488 1489 /* wlsw_emulstate ------------------------------------------------------ */ 1490 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf) 1491 { 1492 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1493 } 1494 1495 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf, 1496 size_t count) 1497 { 1498 unsigned long t; 1499 1500 if (parse_strtoul(buf, 1, &t)) 1501 return -EINVAL; 1502 1503 if (tpacpi_wlsw_emulstate != !!t) { 1504 tpacpi_wlsw_emulstate = !!t; 1505 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1506 } 1507 1508 return count; 1509 } 1510 static DRIVER_ATTR_RW(wlsw_emulstate); 1511 1512 /* bluetooth_emulstate ------------------------------------------------- */ 1513 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf) 1514 { 1515 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1516 } 1517 1518 static ssize_t bluetooth_emulstate_store(struct device_driver *drv, 1519 const char *buf, size_t count) 1520 { 1521 unsigned long t; 1522 1523 if (parse_strtoul(buf, 1, &t)) 1524 return -EINVAL; 1525 1526 tpacpi_bluetooth_emulstate = !!t; 1527 1528 return count; 1529 } 1530 static DRIVER_ATTR_RW(bluetooth_emulstate); 1531 1532 /* wwan_emulstate ------------------------------------------------- */ 1533 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf) 1534 { 1535 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1536 } 1537 1538 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf, 1539 size_t count) 1540 { 1541 unsigned long t; 1542 1543 if (parse_strtoul(buf, 1, &t)) 1544 return -EINVAL; 1545 1546 tpacpi_wwan_emulstate = !!t; 1547 1548 return count; 1549 } 1550 static DRIVER_ATTR_RW(wwan_emulstate); 1551 1552 /* uwb_emulstate ------------------------------------------------- */ 1553 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf) 1554 { 1555 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1556 } 1557 1558 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf, 1559 size_t count) 1560 { 1561 unsigned long t; 1562 1563 if (parse_strtoul(buf, 1, &t)) 1564 return -EINVAL; 1565 1566 tpacpi_uwb_emulstate = !!t; 1567 1568 return count; 1569 } 1570 static DRIVER_ATTR_RW(uwb_emulstate); 1571 #endif 1572 1573 /* --------------------------------------------------------------------- */ 1574 1575 static struct driver_attribute *tpacpi_driver_attributes[] = { 1576 &driver_attr_debug_level, &driver_attr_version, 1577 &driver_attr_interface_version, 1578 }; 1579 1580 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1581 { 1582 int i, res; 1583 1584 i = 0; 1585 res = 0; 1586 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1587 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1588 i++; 1589 } 1590 1591 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1592 if (!res && dbg_wlswemul) 1593 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1594 if (!res && dbg_bluetoothemul) 1595 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1596 if (!res && dbg_wwanemul) 1597 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1598 if (!res && dbg_uwbemul) 1599 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1600 #endif 1601 1602 return res; 1603 } 1604 1605 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1606 { 1607 int i; 1608 1609 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1610 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1611 1612 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1613 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1614 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1615 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1616 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1617 #endif 1618 } 1619 1620 /************************************************************************* 1621 * Firmware Data 1622 */ 1623 1624 /* 1625 * Table of recommended minimum BIOS versions 1626 * 1627 * Reasons for listing: 1628 * 1. Stable BIOS, listed because the unknown amount of 1629 * bugs and bad ACPI behaviour on older versions 1630 * 1631 * 2. BIOS or EC fw with known bugs that trigger on Linux 1632 * 1633 * 3. BIOS with known reduced functionality in older versions 1634 * 1635 * We recommend the latest BIOS and EC version. 1636 * We only support the latest BIOS and EC fw version as a rule. 1637 * 1638 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1639 * Information from users in ThinkWiki 1640 * 1641 * WARNING: we use this table also to detect that the machine is 1642 * a ThinkPad in some cases, so don't remove entries lightly. 1643 */ 1644 1645 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1646 { .vendor = (__v), \ 1647 .bios = TPID(__id1, __id2), \ 1648 .ec = TPACPI_MATCH_ANY, \ 1649 .quirks = TPACPI_MATCH_ANY_VERSION << 16 \ 1650 | TPVER(__bv1, __bv2) } 1651 1652 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1653 __eid, __ev1, __ev2) \ 1654 { .vendor = (__v), \ 1655 .bios = TPID(__bid1, __bid2), \ 1656 .ec = __eid, \ 1657 .quirks = TPVER(__ev1, __ev2) << 16 \ 1658 | TPVER(__bv1, __bv2) } 1659 1660 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1661 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1662 1663 /* Outdated IBM BIOSes often lack the EC id string */ 1664 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1665 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1666 __bv1, __bv2, TPID(__id1, __id2), \ 1667 __ev1, __ev2), \ 1668 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1669 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1670 __ev1, __ev2) 1671 1672 /* Outdated IBM BIOSes often lack the EC id string */ 1673 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1674 __eid1, __eid2, __ev1, __ev2) \ 1675 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1676 __bv1, __bv2, TPID(__eid1, __eid2), \ 1677 __ev1, __ev2), \ 1678 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1679 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1680 __ev1, __ev2) 1681 1682 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1683 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1684 1685 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1686 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1687 __bv1, __bv2, TPID(__id1, __id2), \ 1688 __ev1, __ev2) 1689 1690 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1691 __eid1, __eid2, __ev1, __ev2) \ 1692 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1693 __bv1, __bv2, TPID(__eid1, __eid2), \ 1694 __ev1, __ev2) 1695 1696 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1697 /* Numeric models ------------------ */ 1698 /* FW MODEL BIOS VERS */ 1699 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1700 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1701 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1702 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1703 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1704 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1705 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1706 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1707 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1708 1709 /* A-series ------------------------- */ 1710 /* FW MODEL BIOS VERS EC VERS */ 1711 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1712 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1713 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1714 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1715 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1716 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1717 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1718 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1719 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1720 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1721 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1722 1723 /* G-series ------------------------- */ 1724 /* FW MODEL BIOS VERS */ 1725 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1726 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1727 1728 /* R-series, T-series --------------- */ 1729 /* FW MODEL BIOS VERS EC VERS */ 1730 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1731 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1732 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1733 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1734 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1735 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1736 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1737 T40/p, T41/p, T42/p (1) */ 1738 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1739 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1740 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1741 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1742 1743 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1744 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1745 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1746 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1747 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1748 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1749 1750 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1751 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1752 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1753 1754 /* BIOS FW BIOS VERS EC FW EC VERS */ 1755 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1756 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1757 1758 /* X-series ------------------------- */ 1759 /* FW MODEL BIOS VERS EC VERS */ 1760 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1761 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1762 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1763 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1764 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1765 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1766 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1767 1768 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1769 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1770 1771 /* (0) - older versions lack DMI EC fw string and functionality */ 1772 /* (1) - older versions known to lack functionality */ 1773 }; 1774 1775 #undef TPV_QL1 1776 #undef TPV_QL0 1777 #undef TPV_QI2 1778 #undef TPV_QI1 1779 #undef TPV_QI0 1780 #undef TPV_Q_X 1781 #undef TPV_Q 1782 1783 static void __init tpacpi_check_outdated_fw(void) 1784 { 1785 unsigned long fwvers; 1786 u16 ec_version, bios_version; 1787 1788 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1789 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1790 1791 if (!fwvers) 1792 return; 1793 1794 bios_version = fwvers & 0xffffU; 1795 ec_version = (fwvers >> 16) & 0xffffU; 1796 1797 /* note that unknown versions are set to 0x0000 and we use that */ 1798 if ((bios_version > thinkpad_id.bios_release) || 1799 (ec_version > thinkpad_id.ec_release && 1800 ec_version != TPACPI_MATCH_ANY_VERSION)) { 1801 /* 1802 * The changelogs would let us track down the exact 1803 * reason, but it is just too much of a pain to track 1804 * it. We only list BIOSes that are either really 1805 * broken, or really stable to begin with, so it is 1806 * best if the user upgrades the firmware anyway. 1807 */ 1808 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1809 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n"); 1810 } 1811 } 1812 1813 static bool __init tpacpi_is_fw_known(void) 1814 { 1815 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1816 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1817 } 1818 1819 /**************************************************************************** 1820 **************************************************************************** 1821 * 1822 * Subdrivers 1823 * 1824 **************************************************************************** 1825 ****************************************************************************/ 1826 1827 /************************************************************************* 1828 * thinkpad-acpi metadata subdriver 1829 */ 1830 1831 static int thinkpad_acpi_driver_read(struct seq_file *m) 1832 { 1833 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1834 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1835 return 0; 1836 } 1837 1838 static struct ibm_struct thinkpad_acpi_driver_data = { 1839 .name = "driver", 1840 .read = thinkpad_acpi_driver_read, 1841 }; 1842 1843 /************************************************************************* 1844 * Hotkey subdriver 1845 */ 1846 1847 /* 1848 * ThinkPad firmware event model 1849 * 1850 * The ThinkPad firmware has two main event interfaces: normal ACPI 1851 * notifications (which follow the ACPI standard), and a private event 1852 * interface. 1853 * 1854 * The private event interface also issues events for the hotkeys. As 1855 * the driver gained features, the event handling code ended up being 1856 * built around the hotkey subdriver. This will need to be refactored 1857 * to a more formal event API eventually. 1858 * 1859 * Some "hotkeys" are actually supposed to be used as event reports, 1860 * such as "brightness has changed", "volume has changed", depending on 1861 * the ThinkPad model and how the firmware is operating. 1862 * 1863 * Unlike other classes, hotkey-class events have mask/unmask control on 1864 * non-ancient firmware. However, how it behaves changes a lot with the 1865 * firmware model and version. 1866 */ 1867 1868 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1869 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1870 TP_ACPI_HOTKEYSCAN_FNF2, 1871 TP_ACPI_HOTKEYSCAN_FNF3, 1872 TP_ACPI_HOTKEYSCAN_FNF4, 1873 TP_ACPI_HOTKEYSCAN_FNF5, 1874 TP_ACPI_HOTKEYSCAN_FNF6, 1875 TP_ACPI_HOTKEYSCAN_FNF7, 1876 TP_ACPI_HOTKEYSCAN_FNF8, 1877 TP_ACPI_HOTKEYSCAN_FNF9, 1878 TP_ACPI_HOTKEYSCAN_FNF10, 1879 TP_ACPI_HOTKEYSCAN_FNF11, 1880 TP_ACPI_HOTKEYSCAN_FNF12, 1881 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1882 TP_ACPI_HOTKEYSCAN_FNINSERT, 1883 TP_ACPI_HOTKEYSCAN_FNDELETE, 1884 TP_ACPI_HOTKEYSCAN_FNHOME, 1885 TP_ACPI_HOTKEYSCAN_FNEND, 1886 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1887 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1888 TP_ACPI_HOTKEYSCAN_FNSPACE, 1889 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1890 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1891 TP_ACPI_HOTKEYSCAN_MUTE, 1892 TP_ACPI_HOTKEYSCAN_THINKPAD, 1893 TP_ACPI_HOTKEYSCAN_UNK1, 1894 TP_ACPI_HOTKEYSCAN_UNK2, 1895 TP_ACPI_HOTKEYSCAN_UNK3, 1896 TP_ACPI_HOTKEYSCAN_UNK4, 1897 TP_ACPI_HOTKEYSCAN_UNK5, 1898 TP_ACPI_HOTKEYSCAN_UNK6, 1899 TP_ACPI_HOTKEYSCAN_UNK7, 1900 TP_ACPI_HOTKEYSCAN_UNK8, 1901 1902 /* Adaptive keyboard keycodes */ 1903 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1904 TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1905 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1906 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1907 TP_ACPI_HOTKEYSCAN_CLOUD, 1908 TP_ACPI_HOTKEYSCAN_UNK9, 1909 TP_ACPI_HOTKEYSCAN_VOICE, 1910 TP_ACPI_HOTKEYSCAN_UNK10, 1911 TP_ACPI_HOTKEYSCAN_GESTURES, 1912 TP_ACPI_HOTKEYSCAN_UNK11, 1913 TP_ACPI_HOTKEYSCAN_UNK12, 1914 TP_ACPI_HOTKEYSCAN_UNK13, 1915 TP_ACPI_HOTKEYSCAN_CONFIG, 1916 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1917 TP_ACPI_HOTKEYSCAN_RELOAD, 1918 TP_ACPI_HOTKEYSCAN_BACK, 1919 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1920 TP_ACPI_HOTKEYSCAN_MIC_UP, 1921 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1922 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1923 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1924 1925 /* Lenovo extended keymap, starting at 0x1300 */ 1926 TP_ACPI_HOTKEYSCAN_EXTENDED_START, 1927 /* first new observed key (star, favorites) is 0x1311 */ 1928 TP_ACPI_HOTKEYSCAN_STAR = 69, 1929 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2, 1930 TP_ACPI_HOTKEYSCAN_CALCULATOR, 1931 TP_ACPI_HOTKEYSCAN_BLUETOOTH, 1932 TP_ACPI_HOTKEYSCAN_KEYBOARD, 1933 1934 /* Hotkey keymap size */ 1935 TPACPI_HOTKEY_MAP_LEN 1936 }; 1937 1938 enum { /* Keys/events available through NVRAM polling */ 1939 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1940 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1941 }; 1942 1943 enum { /* Positions of some of the keys in hotkey masks */ 1944 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1945 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1946 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1947 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1948 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1949 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1950 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1951 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1952 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1953 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1954 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1955 }; 1956 1957 enum { /* NVRAM to ACPI HKEY group map */ 1958 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1959 TP_ACPI_HKEY_ZOOM_MASK | 1960 TP_ACPI_HKEY_DISPSWTCH_MASK | 1961 TP_ACPI_HKEY_HIBERNATE_MASK, 1962 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1963 TP_ACPI_HKEY_BRGHTDWN_MASK, 1964 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1965 TP_ACPI_HKEY_VOLDWN_MASK | 1966 TP_ACPI_HKEY_MUTE_MASK, 1967 }; 1968 1969 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1970 struct tp_nvram_state { 1971 u16 thinkpad_toggle:1; 1972 u16 zoom_toggle:1; 1973 u16 display_toggle:1; 1974 u16 thinklight_toggle:1; 1975 u16 hibernate_toggle:1; 1976 u16 displayexp_toggle:1; 1977 u16 display_state:1; 1978 u16 brightness_toggle:1; 1979 u16 volume_toggle:1; 1980 u16 mute:1; 1981 1982 u8 brightness_level; 1983 u8 volume_level; 1984 }; 1985 1986 /* kthread for the hotkey poller */ 1987 static struct task_struct *tpacpi_hotkey_task; 1988 1989 /* 1990 * Acquire mutex to write poller control variables as an 1991 * atomic block. 1992 * 1993 * Increment hotkey_config_change when changing them if you 1994 * want the kthread to forget old state. 1995 * 1996 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1997 */ 1998 static struct mutex hotkey_thread_data_mutex; 1999 static unsigned int hotkey_config_change; 2000 2001 /* 2002 * hotkey poller control variables 2003 * 2004 * Must be atomic or readers will also need to acquire mutex 2005 * 2006 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2007 * should be used only when the changes need to be taken as 2008 * a block, OR when one needs to force the kthread to forget 2009 * old state. 2010 */ 2011 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2012 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2013 2014 #define HOTKEY_CONFIG_CRITICAL_START \ 2015 do { \ 2016 mutex_lock(&hotkey_thread_data_mutex); \ 2017 hotkey_config_change++; \ 2018 } while (0); 2019 #define HOTKEY_CONFIG_CRITICAL_END \ 2020 mutex_unlock(&hotkey_thread_data_mutex); 2021 2022 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2023 2024 #define hotkey_source_mask 0U 2025 #define HOTKEY_CONFIG_CRITICAL_START 2026 #define HOTKEY_CONFIG_CRITICAL_END 2027 2028 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2029 2030 static struct mutex hotkey_mutex; 2031 2032 static enum { /* Reasons for waking up */ 2033 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2034 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2035 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2036 } hotkey_wakeup_reason; 2037 2038 static int hotkey_autosleep_ack; 2039 2040 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2041 static u32 hotkey_all_mask; /* all events supported in fw */ 2042 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */ 2043 static u32 hotkey_reserved_mask; /* events better left disabled */ 2044 static u32 hotkey_driver_mask; /* events needed by the driver */ 2045 static u32 hotkey_user_mask; /* events visible to userspace */ 2046 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2047 2048 static u16 *hotkey_keycode_map; 2049 2050 static struct attribute_set *hotkey_dev_attributes; 2051 2052 static void tpacpi_driver_event(const unsigned int hkey_event); 2053 static void hotkey_driver_event(const unsigned int scancode); 2054 static void hotkey_poll_setup(const bool may_warn); 2055 2056 /* HKEY.MHKG() return bits */ 2057 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2058 enum { 2059 TP_ACPI_MULTI_MODE_INVALID = 0, 2060 TP_ACPI_MULTI_MODE_UNKNOWN = 1 << 0, 2061 TP_ACPI_MULTI_MODE_LAPTOP = 1 << 1, 2062 TP_ACPI_MULTI_MODE_TABLET = 1 << 2, 2063 TP_ACPI_MULTI_MODE_FLAT = 1 << 3, 2064 TP_ACPI_MULTI_MODE_STAND = 1 << 4, 2065 TP_ACPI_MULTI_MODE_TENT = 1 << 5, 2066 TP_ACPI_MULTI_MODE_STAND_TENT = 1 << 6, 2067 }; 2068 2069 enum { 2070 /* The following modes are considered tablet mode for the purpose of 2071 * reporting the status to userspace. i.e. in all these modes it makes 2072 * sense to disable the laptop input devices such as touchpad and 2073 * keyboard. 2074 */ 2075 TP_ACPI_MULTI_MODE_TABLET_LIKE = TP_ACPI_MULTI_MODE_TABLET | 2076 TP_ACPI_MULTI_MODE_STAND | 2077 TP_ACPI_MULTI_MODE_TENT | 2078 TP_ACPI_MULTI_MODE_STAND_TENT, 2079 }; 2080 2081 static int hotkey_get_wlsw(void) 2082 { 2083 int status; 2084 2085 if (!tp_features.hotkey_wlsw) 2086 return -ENODEV; 2087 2088 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2089 if (dbg_wlswemul) 2090 return (tpacpi_wlsw_emulstate) ? 2091 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2092 #endif 2093 2094 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2095 return -EIO; 2096 2097 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2098 } 2099 2100 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode) 2101 { 2102 int type = (s >> 16) & 0xffff; 2103 int value = s & 0xffff; 2104 int mode = TP_ACPI_MULTI_MODE_INVALID; 2105 int valid_modes = 0; 2106 2107 if (has_tablet_mode) 2108 *has_tablet_mode = 0; 2109 2110 switch (type) { 2111 case 1: 2112 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2113 TP_ACPI_MULTI_MODE_TABLET | 2114 TP_ACPI_MULTI_MODE_STAND_TENT; 2115 break; 2116 case 2: 2117 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2118 TP_ACPI_MULTI_MODE_FLAT | 2119 TP_ACPI_MULTI_MODE_TABLET | 2120 TP_ACPI_MULTI_MODE_STAND | 2121 TP_ACPI_MULTI_MODE_TENT; 2122 break; 2123 case 3: 2124 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2125 TP_ACPI_MULTI_MODE_FLAT; 2126 break; 2127 case 4: 2128 case 5: 2129 /* In mode 4, FLAT is not specified as a valid mode. However, 2130 * it can be seen at least on the X1 Yoga 2nd Generation. 2131 */ 2132 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2133 TP_ACPI_MULTI_MODE_FLAT | 2134 TP_ACPI_MULTI_MODE_TABLET | 2135 TP_ACPI_MULTI_MODE_STAND | 2136 TP_ACPI_MULTI_MODE_TENT; 2137 break; 2138 default: 2139 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n", 2140 type, value, TPACPI_MAIL); 2141 return 0; 2142 } 2143 2144 if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE)) 2145 *has_tablet_mode = 1; 2146 2147 switch (value) { 2148 case 1: 2149 mode = TP_ACPI_MULTI_MODE_LAPTOP; 2150 break; 2151 case 2: 2152 mode = TP_ACPI_MULTI_MODE_FLAT; 2153 break; 2154 case 3: 2155 mode = TP_ACPI_MULTI_MODE_TABLET; 2156 break; 2157 case 4: 2158 if (type == 1) 2159 mode = TP_ACPI_MULTI_MODE_STAND_TENT; 2160 else 2161 mode = TP_ACPI_MULTI_MODE_STAND; 2162 break; 2163 case 5: 2164 mode = TP_ACPI_MULTI_MODE_TENT; 2165 break; 2166 default: 2167 if (type == 5 && value == 0xffff) { 2168 pr_warn("Multi mode status is undetected, assuming laptop\n"); 2169 return 0; 2170 } 2171 } 2172 2173 if (!(mode & valid_modes)) { 2174 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n", 2175 value, type, TPACPI_MAIL); 2176 return 0; 2177 } 2178 2179 return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE); 2180 } 2181 2182 static int hotkey_get_tablet_mode(int *status) 2183 { 2184 int s; 2185 2186 switch (tp_features.hotkey_tablet) { 2187 case TP_HOTKEY_TABLET_USES_MHKG: 2188 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2189 return -EIO; 2190 2191 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2192 break; 2193 case TP_HOTKEY_TABLET_USES_GMMS: 2194 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0)) 2195 return -EIO; 2196 2197 *status = hotkey_gmms_get_tablet_mode(s, NULL); 2198 break; 2199 default: 2200 break; 2201 } 2202 2203 return 0; 2204 } 2205 2206 /* 2207 * Reads current event mask from firmware, and updates 2208 * hotkey_acpi_mask accordingly. Also resets any bits 2209 * from hotkey_user_mask that are unavailable to be 2210 * delivered (shadow requirement of the userspace ABI). 2211 * 2212 * Call with hotkey_mutex held 2213 */ 2214 static int hotkey_mask_get(void) 2215 { 2216 if (tp_features.hotkey_mask) { 2217 u32 m = 0; 2218 2219 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2220 return -EIO; 2221 2222 hotkey_acpi_mask = m; 2223 } else { 2224 /* no mask support doesn't mean no event support... */ 2225 hotkey_acpi_mask = hotkey_all_mask; 2226 } 2227 2228 /* sync userspace-visible mask */ 2229 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2230 2231 return 0; 2232 } 2233 2234 static void hotkey_mask_warn_incomplete_mask(void) 2235 { 2236 /* log only what the user can fix... */ 2237 const u32 wantedmask = hotkey_driver_mask & 2238 ~(hotkey_acpi_mask | hotkey_source_mask) & 2239 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2240 2241 if (wantedmask) 2242 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2243 } 2244 2245 /* 2246 * Set the firmware mask when supported 2247 * 2248 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2249 * 2250 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2251 * 2252 * Call with hotkey_mutex held 2253 */ 2254 static int hotkey_mask_set(u32 mask) 2255 { 2256 int i; 2257 int rc = 0; 2258 2259 const u32 fwmask = mask & ~hotkey_source_mask; 2260 2261 if (tp_features.hotkey_mask) { 2262 for (i = 0; i < 32; i++) { 2263 if (!acpi_evalf(hkey_handle, 2264 NULL, "MHKM", "vdd", i + 1, 2265 !!(mask & (1 << i)))) { 2266 rc = -EIO; 2267 break; 2268 } 2269 } 2270 } 2271 2272 /* 2273 * We *must* make an inconditional call to hotkey_mask_get to 2274 * refresh hotkey_acpi_mask and update hotkey_user_mask 2275 * 2276 * Take the opportunity to also log when we cannot _enable_ 2277 * a given event. 2278 */ 2279 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2280 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n", 2281 fwmask, hotkey_acpi_mask); 2282 } 2283 2284 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2285 hotkey_mask_warn_incomplete_mask(); 2286 2287 return rc; 2288 } 2289 2290 /* 2291 * Sets hotkey_user_mask and tries to set the firmware mask 2292 * 2293 * Call with hotkey_mutex held 2294 */ 2295 static int hotkey_user_mask_set(const u32 mask) 2296 { 2297 int rc; 2298 2299 /* Give people a chance to notice they are doing something that 2300 * is bound to go boom on their users sooner or later */ 2301 if (!tp_warned.hotkey_mask_ff && 2302 (mask == 0xffff || mask == 0xffffff || 2303 mask == 0xffffffff)) { 2304 tp_warned.hotkey_mask_ff = 1; 2305 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n", 2306 mask); 2307 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n"); 2308 } 2309 2310 /* Try to enable what the user asked for, plus whatever we need. 2311 * this syncs everything but won't enable bits in hotkey_user_mask */ 2312 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2313 2314 /* Enable the available bits in hotkey_user_mask */ 2315 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2316 2317 return rc; 2318 } 2319 2320 /* 2321 * Sets the driver hotkey mask. 2322 * 2323 * Can be called even if the hotkey subdriver is inactive 2324 */ 2325 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2326 { 2327 int rc; 2328 2329 /* Do the right thing if hotkey_init has not been called yet */ 2330 if (!tp_features.hotkey) { 2331 hotkey_driver_mask = mask; 2332 return 0; 2333 } 2334 2335 mutex_lock(&hotkey_mutex); 2336 2337 HOTKEY_CONFIG_CRITICAL_START 2338 hotkey_driver_mask = mask; 2339 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2340 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2341 #endif 2342 HOTKEY_CONFIG_CRITICAL_END 2343 2344 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2345 ~hotkey_source_mask); 2346 hotkey_poll_setup(true); 2347 2348 mutex_unlock(&hotkey_mutex); 2349 2350 return rc; 2351 } 2352 2353 static int hotkey_status_get(int *status) 2354 { 2355 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2356 return -EIO; 2357 2358 return 0; 2359 } 2360 2361 static int hotkey_status_set(bool enable) 2362 { 2363 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2364 return -EIO; 2365 2366 return 0; 2367 } 2368 2369 static void tpacpi_input_send_tabletsw(void) 2370 { 2371 int state; 2372 2373 if (tp_features.hotkey_tablet && 2374 !hotkey_get_tablet_mode(&state)) { 2375 mutex_lock(&tpacpi_inputdev_send_mutex); 2376 2377 input_report_switch(tpacpi_inputdev, 2378 SW_TABLET_MODE, !!state); 2379 input_sync(tpacpi_inputdev); 2380 2381 mutex_unlock(&tpacpi_inputdev_send_mutex); 2382 } 2383 } 2384 2385 /* Do NOT call without validating scancode first */ 2386 static void tpacpi_input_send_key(const unsigned int scancode) 2387 { 2388 const unsigned int keycode = hotkey_keycode_map[scancode]; 2389 2390 if (keycode != KEY_RESERVED) { 2391 mutex_lock(&tpacpi_inputdev_send_mutex); 2392 2393 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2394 input_report_key(tpacpi_inputdev, keycode, 1); 2395 input_sync(tpacpi_inputdev); 2396 2397 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2398 input_report_key(tpacpi_inputdev, keycode, 0); 2399 input_sync(tpacpi_inputdev); 2400 2401 mutex_unlock(&tpacpi_inputdev_send_mutex); 2402 } 2403 } 2404 2405 /* Do NOT call without validating scancode first */ 2406 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2407 { 2408 hotkey_driver_event(scancode); 2409 if (hotkey_user_mask & (1 << scancode)) 2410 tpacpi_input_send_key(scancode); 2411 } 2412 2413 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2414 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2415 2416 /* Do NOT call without validating scancode first */ 2417 static void tpacpi_hotkey_send_key(unsigned int scancode) 2418 { 2419 tpacpi_input_send_key_masked(scancode); 2420 } 2421 2422 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2423 { 2424 u8 d; 2425 2426 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2427 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2428 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2429 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2430 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2431 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2432 } 2433 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) { 2434 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2435 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2436 } 2437 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2438 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2439 n->displayexp_toggle = 2440 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2441 } 2442 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2443 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2444 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2445 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2446 n->brightness_toggle = 2447 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2448 } 2449 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2450 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2451 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2452 >> TP_NVRAM_POS_LEVEL_VOLUME; 2453 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2454 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2455 } 2456 } 2457 2458 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2459 do { \ 2460 if ((event_mask & (1 << __scancode)) && \ 2461 oldn->__member != newn->__member) \ 2462 tpacpi_hotkey_send_key(__scancode); \ 2463 } while (0) 2464 2465 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2466 do { \ 2467 if (event_mask & (1 << __scancode)) \ 2468 tpacpi_hotkey_send_key(__scancode); \ 2469 } while (0) 2470 2471 static void issue_volchange(const unsigned int oldvol, 2472 const unsigned int newvol, 2473 const u32 event_mask) 2474 { 2475 unsigned int i = oldvol; 2476 2477 while (i > newvol) { 2478 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2479 i--; 2480 } 2481 while (i < newvol) { 2482 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2483 i++; 2484 } 2485 } 2486 2487 static void issue_brightnesschange(const unsigned int oldbrt, 2488 const unsigned int newbrt, 2489 const u32 event_mask) 2490 { 2491 unsigned int i = oldbrt; 2492 2493 while (i > newbrt) { 2494 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2495 i--; 2496 } 2497 while (i < newbrt) { 2498 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2499 i++; 2500 } 2501 } 2502 2503 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2504 struct tp_nvram_state *newn, 2505 const u32 event_mask) 2506 { 2507 2508 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2509 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2510 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2511 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2512 2513 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2514 2515 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2516 2517 /* 2518 * Handle volume 2519 * 2520 * This code is supposed to duplicate the IBM firmware behaviour: 2521 * - Pressing MUTE issues mute hotkey message, even when already mute 2522 * - Pressing Volume up/down issues volume up/down hotkey messages, 2523 * even when already at maximum or minimum volume 2524 * - The act of unmuting issues volume up/down notification, 2525 * depending which key was used to unmute 2526 * 2527 * We are constrained to what the NVRAM can tell us, which is not much 2528 * and certainly not enough if more than one volume hotkey was pressed 2529 * since the last poll cycle. 2530 * 2531 * Just to make our life interesting, some newer Lenovo ThinkPads have 2532 * bugs in the BIOS and may fail to update volume_toggle properly. 2533 */ 2534 if (newn->mute) { 2535 /* muted */ 2536 if (!oldn->mute || 2537 oldn->volume_toggle != newn->volume_toggle || 2538 oldn->volume_level != newn->volume_level) { 2539 /* recently muted, or repeated mute keypress, or 2540 * multiple presses ending in mute */ 2541 issue_volchange(oldn->volume_level, newn->volume_level, 2542 event_mask); 2543 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2544 } 2545 } else { 2546 /* unmute */ 2547 if (oldn->mute) { 2548 /* recently unmuted, issue 'unmute' keypress */ 2549 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2550 } 2551 if (oldn->volume_level != newn->volume_level) { 2552 issue_volchange(oldn->volume_level, newn->volume_level, 2553 event_mask); 2554 } else if (oldn->volume_toggle != newn->volume_toggle) { 2555 /* repeated vol up/down keypress at end of scale ? */ 2556 if (newn->volume_level == 0) 2557 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2558 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2559 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2560 } 2561 } 2562 2563 /* handle brightness */ 2564 if (oldn->brightness_level != newn->brightness_level) { 2565 issue_brightnesschange(oldn->brightness_level, 2566 newn->brightness_level, event_mask); 2567 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2568 /* repeated key presses that didn't change state */ 2569 if (newn->brightness_level == 0) 2570 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2571 else if (newn->brightness_level >= bright_maxlvl 2572 && !tp_features.bright_unkfw) 2573 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2574 } 2575 2576 #undef TPACPI_COMPARE_KEY 2577 #undef TPACPI_MAY_SEND_KEY 2578 } 2579 2580 /* 2581 * Polling driver 2582 * 2583 * We track all events in hotkey_source_mask all the time, since 2584 * most of them are edge-based. We only issue those requested by 2585 * hotkey_user_mask or hotkey_driver_mask, though. 2586 */ 2587 static int hotkey_kthread(void *data) 2588 { 2589 struct tp_nvram_state s[2]; 2590 u32 poll_mask, event_mask; 2591 unsigned int si, so; 2592 unsigned long t; 2593 unsigned int change_detector; 2594 unsigned int poll_freq; 2595 bool was_frozen; 2596 2597 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2598 goto exit; 2599 2600 set_freezable(); 2601 2602 so = 0; 2603 si = 1; 2604 t = 0; 2605 2606 /* Initial state for compares */ 2607 mutex_lock(&hotkey_thread_data_mutex); 2608 change_detector = hotkey_config_change; 2609 poll_mask = hotkey_source_mask; 2610 event_mask = hotkey_source_mask & 2611 (hotkey_driver_mask | hotkey_user_mask); 2612 poll_freq = hotkey_poll_freq; 2613 mutex_unlock(&hotkey_thread_data_mutex); 2614 hotkey_read_nvram(&s[so], poll_mask); 2615 2616 while (!kthread_should_stop()) { 2617 if (t == 0) { 2618 if (likely(poll_freq)) 2619 t = 1000/poll_freq; 2620 else 2621 t = 100; /* should never happen... */ 2622 } 2623 t = msleep_interruptible(t); 2624 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2625 break; 2626 2627 if (t > 0 && !was_frozen) 2628 continue; 2629 2630 mutex_lock(&hotkey_thread_data_mutex); 2631 if (was_frozen || hotkey_config_change != change_detector) { 2632 /* forget old state on thaw or config change */ 2633 si = so; 2634 t = 0; 2635 change_detector = hotkey_config_change; 2636 } 2637 poll_mask = hotkey_source_mask; 2638 event_mask = hotkey_source_mask & 2639 (hotkey_driver_mask | hotkey_user_mask); 2640 poll_freq = hotkey_poll_freq; 2641 mutex_unlock(&hotkey_thread_data_mutex); 2642 2643 if (likely(poll_mask)) { 2644 hotkey_read_nvram(&s[si], poll_mask); 2645 if (likely(si != so)) { 2646 hotkey_compare_and_issue_event(&s[so], &s[si], 2647 event_mask); 2648 } 2649 } 2650 2651 so = si; 2652 si ^= 1; 2653 } 2654 2655 exit: 2656 return 0; 2657 } 2658 2659 /* call with hotkey_mutex held */ 2660 static void hotkey_poll_stop_sync(void) 2661 { 2662 if (tpacpi_hotkey_task) { 2663 kthread_stop(tpacpi_hotkey_task); 2664 tpacpi_hotkey_task = NULL; 2665 } 2666 } 2667 2668 /* call with hotkey_mutex held */ 2669 static void hotkey_poll_setup(const bool may_warn) 2670 { 2671 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2672 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2673 2674 if (hotkey_poll_freq > 0 && 2675 (poll_driver_mask || 2676 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2677 if (!tpacpi_hotkey_task) { 2678 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2679 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2680 if (IS_ERR(tpacpi_hotkey_task)) { 2681 tpacpi_hotkey_task = NULL; 2682 pr_err("could not create kernel thread for hotkey polling\n"); 2683 } 2684 } 2685 } else { 2686 hotkey_poll_stop_sync(); 2687 if (may_warn && (poll_driver_mask || poll_user_mask) && 2688 hotkey_poll_freq == 0) { 2689 pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n", 2690 poll_user_mask, poll_driver_mask); 2691 } 2692 } 2693 } 2694 2695 static void hotkey_poll_setup_safe(const bool may_warn) 2696 { 2697 mutex_lock(&hotkey_mutex); 2698 hotkey_poll_setup(may_warn); 2699 mutex_unlock(&hotkey_mutex); 2700 } 2701 2702 /* call with hotkey_mutex held */ 2703 static void hotkey_poll_set_freq(unsigned int freq) 2704 { 2705 if (!freq) 2706 hotkey_poll_stop_sync(); 2707 2708 hotkey_poll_freq = freq; 2709 } 2710 2711 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2712 2713 static void hotkey_poll_setup(const bool __unused) 2714 { 2715 } 2716 2717 static void hotkey_poll_setup_safe(const bool __unused) 2718 { 2719 } 2720 2721 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2722 2723 static int hotkey_inputdev_open(struct input_dev *dev) 2724 { 2725 switch (tpacpi_lifecycle) { 2726 case TPACPI_LIFE_INIT: 2727 case TPACPI_LIFE_RUNNING: 2728 hotkey_poll_setup_safe(false); 2729 return 0; 2730 case TPACPI_LIFE_EXITING: 2731 return -EBUSY; 2732 } 2733 2734 /* Should only happen if tpacpi_lifecycle is corrupt */ 2735 BUG(); 2736 return -EBUSY; 2737 } 2738 2739 static void hotkey_inputdev_close(struct input_dev *dev) 2740 { 2741 /* disable hotkey polling when possible */ 2742 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2743 !(hotkey_source_mask & hotkey_driver_mask)) 2744 hotkey_poll_setup_safe(false); 2745 } 2746 2747 /* sysfs hotkey enable ------------------------------------------------- */ 2748 static ssize_t hotkey_enable_show(struct device *dev, 2749 struct device_attribute *attr, 2750 char *buf) 2751 { 2752 int res, status; 2753 2754 printk_deprecated_attribute("hotkey_enable", 2755 "Hotkey reporting is always enabled"); 2756 2757 res = hotkey_status_get(&status); 2758 if (res) 2759 return res; 2760 2761 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2762 } 2763 2764 static ssize_t hotkey_enable_store(struct device *dev, 2765 struct device_attribute *attr, 2766 const char *buf, size_t count) 2767 { 2768 unsigned long t; 2769 2770 printk_deprecated_attribute("hotkey_enable", 2771 "Hotkeys can be disabled through hotkey_mask"); 2772 2773 if (parse_strtoul(buf, 1, &t)) 2774 return -EINVAL; 2775 2776 if (t == 0) 2777 return -EPERM; 2778 2779 return count; 2780 } 2781 2782 static DEVICE_ATTR_RW(hotkey_enable); 2783 2784 /* sysfs hotkey mask --------------------------------------------------- */ 2785 static ssize_t hotkey_mask_show(struct device *dev, 2786 struct device_attribute *attr, 2787 char *buf) 2788 { 2789 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2790 } 2791 2792 static ssize_t hotkey_mask_store(struct device *dev, 2793 struct device_attribute *attr, 2794 const char *buf, size_t count) 2795 { 2796 unsigned long t; 2797 int res; 2798 2799 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2800 return -EINVAL; 2801 2802 if (mutex_lock_killable(&hotkey_mutex)) 2803 return -ERESTARTSYS; 2804 2805 res = hotkey_user_mask_set(t); 2806 2807 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2808 hotkey_poll_setup(true); 2809 #endif 2810 2811 mutex_unlock(&hotkey_mutex); 2812 2813 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2814 2815 return (res) ? res : count; 2816 } 2817 2818 static DEVICE_ATTR_RW(hotkey_mask); 2819 2820 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2821 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2822 struct device_attribute *attr, 2823 char *buf) 2824 { 2825 return sprintf(buf, "0\n"); 2826 } 2827 2828 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2829 2830 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2831 static ssize_t hotkey_bios_mask_show(struct device *dev, 2832 struct device_attribute *attr, 2833 char *buf) 2834 { 2835 printk_deprecated_attribute("hotkey_bios_mask", 2836 "This attribute is useless."); 2837 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2838 } 2839 2840 static DEVICE_ATTR_RO(hotkey_bios_mask); 2841 2842 /* sysfs hotkey all_mask ----------------------------------------------- */ 2843 static ssize_t hotkey_all_mask_show(struct device *dev, 2844 struct device_attribute *attr, 2845 char *buf) 2846 { 2847 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2848 hotkey_all_mask | hotkey_source_mask); 2849 } 2850 2851 static DEVICE_ATTR_RO(hotkey_all_mask); 2852 2853 /* sysfs hotkey all_mask ----------------------------------------------- */ 2854 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev, 2855 struct device_attribute *attr, 2856 char *buf) 2857 { 2858 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2859 hotkey_adaptive_all_mask | hotkey_source_mask); 2860 } 2861 2862 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask); 2863 2864 /* sysfs hotkey recommended_mask --------------------------------------- */ 2865 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2866 struct device_attribute *attr, 2867 char *buf) 2868 { 2869 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2870 (hotkey_all_mask | hotkey_source_mask) 2871 & ~hotkey_reserved_mask); 2872 } 2873 2874 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2875 2876 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2877 2878 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2879 static ssize_t hotkey_source_mask_show(struct device *dev, 2880 struct device_attribute *attr, 2881 char *buf) 2882 { 2883 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2884 } 2885 2886 static ssize_t hotkey_source_mask_store(struct device *dev, 2887 struct device_attribute *attr, 2888 const char *buf, size_t count) 2889 { 2890 unsigned long t; 2891 u32 r_ev; 2892 int rc; 2893 2894 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2895 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2896 return -EINVAL; 2897 2898 if (mutex_lock_killable(&hotkey_mutex)) 2899 return -ERESTARTSYS; 2900 2901 HOTKEY_CONFIG_CRITICAL_START 2902 hotkey_source_mask = t; 2903 HOTKEY_CONFIG_CRITICAL_END 2904 2905 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2906 ~hotkey_source_mask); 2907 hotkey_poll_setup(true); 2908 2909 /* check if events needed by the driver got disabled */ 2910 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2911 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2912 2913 mutex_unlock(&hotkey_mutex); 2914 2915 if (rc < 0) 2916 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n"); 2917 2918 if (r_ev) 2919 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n", 2920 r_ev); 2921 2922 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2923 2924 return (rc < 0) ? rc : count; 2925 } 2926 2927 static DEVICE_ATTR_RW(hotkey_source_mask); 2928 2929 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2930 static ssize_t hotkey_poll_freq_show(struct device *dev, 2931 struct device_attribute *attr, 2932 char *buf) 2933 { 2934 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2935 } 2936 2937 static ssize_t hotkey_poll_freq_store(struct device *dev, 2938 struct device_attribute *attr, 2939 const char *buf, size_t count) 2940 { 2941 unsigned long t; 2942 2943 if (parse_strtoul(buf, 25, &t)) 2944 return -EINVAL; 2945 2946 if (mutex_lock_killable(&hotkey_mutex)) 2947 return -ERESTARTSYS; 2948 2949 hotkey_poll_set_freq(t); 2950 hotkey_poll_setup(true); 2951 2952 mutex_unlock(&hotkey_mutex); 2953 2954 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2955 2956 return count; 2957 } 2958 2959 static DEVICE_ATTR_RW(hotkey_poll_freq); 2960 2961 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2962 2963 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2964 static ssize_t hotkey_radio_sw_show(struct device *dev, 2965 struct device_attribute *attr, 2966 char *buf) 2967 { 2968 int res; 2969 res = hotkey_get_wlsw(); 2970 if (res < 0) 2971 return res; 2972 2973 /* Opportunistic update */ 2974 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2975 2976 return snprintf(buf, PAGE_SIZE, "%d\n", 2977 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2978 } 2979 2980 static DEVICE_ATTR_RO(hotkey_radio_sw); 2981 2982 static void hotkey_radio_sw_notify_change(void) 2983 { 2984 if (tp_features.hotkey_wlsw) 2985 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2986 "hotkey_radio_sw"); 2987 } 2988 2989 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2990 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2991 struct device_attribute *attr, 2992 char *buf) 2993 { 2994 int res, s; 2995 res = hotkey_get_tablet_mode(&s); 2996 if (res < 0) 2997 return res; 2998 2999 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 3000 } 3001 3002 static DEVICE_ATTR_RO(hotkey_tablet_mode); 3003 3004 static void hotkey_tablet_mode_notify_change(void) 3005 { 3006 if (tp_features.hotkey_tablet) 3007 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3008 "hotkey_tablet_mode"); 3009 } 3010 3011 /* sysfs wakeup reason (pollable) -------------------------------------- */ 3012 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 3013 struct device_attribute *attr, 3014 char *buf) 3015 { 3016 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 3017 } 3018 3019 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 3020 3021 static void hotkey_wakeup_reason_notify_change(void) 3022 { 3023 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3024 "wakeup_reason"); 3025 } 3026 3027 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 3028 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 3029 struct device_attribute *attr, 3030 char *buf) 3031 { 3032 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 3033 } 3034 3035 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 3036 hotkey_wakeup_hotunplug_complete_show, NULL); 3037 3038 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 3039 { 3040 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3041 "wakeup_hotunplug_complete"); 3042 } 3043 3044 /* sysfs adaptive kbd mode --------------------------------------------- */ 3045 3046 static int adaptive_keyboard_get_mode(void); 3047 static int adaptive_keyboard_set_mode(int new_mode); 3048 3049 enum ADAPTIVE_KEY_MODE { 3050 HOME_MODE, 3051 WEB_BROWSER_MODE, 3052 WEB_CONFERENCE_MODE, 3053 FUNCTION_MODE, 3054 LAYFLAT_MODE 3055 }; 3056 3057 static ssize_t adaptive_kbd_mode_show(struct device *dev, 3058 struct device_attribute *attr, 3059 char *buf) 3060 { 3061 int current_mode; 3062 3063 current_mode = adaptive_keyboard_get_mode(); 3064 if (current_mode < 0) 3065 return current_mode; 3066 3067 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 3068 } 3069 3070 static ssize_t adaptive_kbd_mode_store(struct device *dev, 3071 struct device_attribute *attr, 3072 const char *buf, size_t count) 3073 { 3074 unsigned long t; 3075 int res; 3076 3077 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 3078 return -EINVAL; 3079 3080 res = adaptive_keyboard_set_mode(t); 3081 return (res < 0) ? res : count; 3082 } 3083 3084 static DEVICE_ATTR_RW(adaptive_kbd_mode); 3085 3086 static struct attribute *adaptive_kbd_attributes[] = { 3087 &dev_attr_adaptive_kbd_mode.attr, 3088 NULL 3089 }; 3090 3091 static const struct attribute_group adaptive_kbd_attr_group = { 3092 .attrs = adaptive_kbd_attributes, 3093 }; 3094 3095 /* --------------------------------------------------------------------- */ 3096 3097 static struct attribute *hotkey_attributes[] __initdata = { 3098 &dev_attr_hotkey_enable.attr, 3099 &dev_attr_hotkey_bios_enabled.attr, 3100 &dev_attr_hotkey_bios_mask.attr, 3101 &dev_attr_wakeup_reason.attr, 3102 &dev_attr_wakeup_hotunplug_complete.attr, 3103 &dev_attr_hotkey_mask.attr, 3104 &dev_attr_hotkey_all_mask.attr, 3105 &dev_attr_hotkey_adaptive_all_mask.attr, 3106 &dev_attr_hotkey_recommended_mask.attr, 3107 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3108 &dev_attr_hotkey_source_mask.attr, 3109 &dev_attr_hotkey_poll_freq.attr, 3110 #endif 3111 }; 3112 3113 /* 3114 * Sync both the hw and sw blocking state of all switches 3115 */ 3116 static void tpacpi_send_radiosw_update(void) 3117 { 3118 int wlsw; 3119 3120 /* 3121 * We must sync all rfkill controllers *before* issuing any 3122 * rfkill input events, or we will race the rfkill core input 3123 * handler. 3124 * 3125 * tpacpi_inputdev_send_mutex works as a synchronization point 3126 * for the above. 3127 * 3128 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3129 */ 3130 3131 wlsw = hotkey_get_wlsw(); 3132 3133 /* Sync hw blocking state first if it is hw-blocked */ 3134 if (wlsw == TPACPI_RFK_RADIO_OFF) 3135 tpacpi_rfk_update_hwblock_state(true); 3136 3137 /* Sync sw blocking state */ 3138 tpacpi_rfk_update_swstate_all(); 3139 3140 /* Sync hw blocking state last if it is hw-unblocked */ 3141 if (wlsw == TPACPI_RFK_RADIO_ON) 3142 tpacpi_rfk_update_hwblock_state(false); 3143 3144 /* Issue rfkill input event for WLSW switch */ 3145 if (!(wlsw < 0)) { 3146 mutex_lock(&tpacpi_inputdev_send_mutex); 3147 3148 input_report_switch(tpacpi_inputdev, 3149 SW_RFKILL_ALL, (wlsw > 0)); 3150 input_sync(tpacpi_inputdev); 3151 3152 mutex_unlock(&tpacpi_inputdev_send_mutex); 3153 } 3154 3155 /* 3156 * this can be unconditional, as we will poll state again 3157 * if userspace uses the notify to read data 3158 */ 3159 hotkey_radio_sw_notify_change(); 3160 } 3161 3162 static void hotkey_exit(void) 3163 { 3164 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3165 mutex_lock(&hotkey_mutex); 3166 hotkey_poll_stop_sync(); 3167 mutex_unlock(&hotkey_mutex); 3168 #endif 3169 3170 if (hotkey_dev_attributes) 3171 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3172 3173 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3174 "restoring original HKEY status and mask\n"); 3175 /* yes, there is a bitwise or below, we want the 3176 * functions to be called even if one of them fail */ 3177 if (((tp_features.hotkey_mask && 3178 hotkey_mask_set(hotkey_orig_mask)) | 3179 hotkey_status_set(false)) != 0) 3180 pr_err("failed to restore hot key mask to BIOS defaults\n"); 3181 } 3182 3183 static void __init hotkey_unmap(const unsigned int scancode) 3184 { 3185 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3186 clear_bit(hotkey_keycode_map[scancode], 3187 tpacpi_inputdev->keybit); 3188 hotkey_keycode_map[scancode] = KEY_RESERVED; 3189 } 3190 } 3191 3192 /* 3193 * HKEY quirks: 3194 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3195 */ 3196 3197 #define TPACPI_HK_Q_INIMASK 0x0001 3198 3199 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3200 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3201 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3202 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3203 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3204 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3205 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3206 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3207 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3208 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3209 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3210 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3211 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3212 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3213 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3214 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3215 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3216 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3217 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3218 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3219 }; 3220 3221 typedef u16 tpacpi_keymap_entry_t; 3222 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3223 3224 static int hotkey_init_tablet_mode(void) 3225 { 3226 int in_tablet_mode = 0, res; 3227 char *type = NULL; 3228 3229 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) { 3230 int has_tablet_mode; 3231 3232 in_tablet_mode = hotkey_gmms_get_tablet_mode(res, 3233 &has_tablet_mode); 3234 if (has_tablet_mode) 3235 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS; 3236 type = "GMMS"; 3237 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { 3238 /* For X41t, X60t, X61t Tablets... */ 3239 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; 3240 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); 3241 type = "MHKG"; 3242 } 3243 3244 if (!tp_features.hotkey_tablet) 3245 return 0; 3246 3247 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", 3248 type, in_tablet_mode ? "tablet" : "laptop"); 3249 3250 res = add_to_attr_set(hotkey_dev_attributes, 3251 &dev_attr_hotkey_tablet_mode.attr); 3252 if (res) 3253 return -1; 3254 3255 return in_tablet_mode; 3256 } 3257 3258 static int __init hotkey_init(struct ibm_init_struct *iibm) 3259 { 3260 /* Requirements for changing the default keymaps: 3261 * 3262 * 1. Many of the keys are mapped to KEY_RESERVED for very 3263 * good reasons. Do not change them unless you have deep 3264 * knowledge on the IBM and Lenovo ThinkPad firmware for 3265 * the various ThinkPad models. The driver behaves 3266 * differently for KEY_RESERVED: such keys have their 3267 * hot key mask *unset* in mask_recommended, and also 3268 * in the initial hot key mask programmed into the 3269 * firmware at driver load time, which means the firm- 3270 * ware may react very differently if you change them to 3271 * something else; 3272 * 3273 * 2. You must be subscribed to the linux-thinkpad and 3274 * ibm-acpi-devel mailing lists, and you should read the 3275 * list archives since 2007 if you want to change the 3276 * keymaps. This requirement exists so that you will 3277 * know the past history of problems with the thinkpad- 3278 * acpi driver keymaps, and also that you will be 3279 * listening to any bug reports; 3280 * 3281 * 3. Do not send thinkpad-acpi specific patches directly to 3282 * for merging, *ever*. Send them to the linux-acpi 3283 * mailinglist for comments. Merging is to be done only 3284 * through acpi-test and the ACPI maintainer. 3285 * 3286 * If the above is too much to ask, don't change the keymap. 3287 * Ask the thinkpad-acpi maintainer to do it, instead. 3288 */ 3289 3290 enum keymap_index { 3291 TPACPI_KEYMAP_IBM_GENERIC = 0, 3292 TPACPI_KEYMAP_LENOVO_GENERIC, 3293 }; 3294 3295 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3296 /* Generic keymap for IBM ThinkPads */ 3297 [TPACPI_KEYMAP_IBM_GENERIC] = { 3298 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3299 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3300 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3301 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3302 3303 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3304 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3305 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3306 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3307 3308 /* brightness: firmware always reacts to them */ 3309 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3310 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3311 3312 /* Thinklight: firmware always react to it */ 3313 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3314 3315 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3316 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3317 3318 /* Volume: firmware always react to it and reprograms 3319 * the built-in *extra* mixer. Never map it to control 3320 * another mixer by default. */ 3321 KEY_RESERVED, /* 0x14: VOLUME UP */ 3322 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3323 KEY_RESERVED, /* 0x16: MUTE */ 3324 3325 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3326 3327 /* (assignments unknown, please report if found) */ 3328 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3329 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3330 3331 /* No assignments, only used for Adaptive keyboards. */ 3332 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 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, 3337 3338 /* No assignment, used for newer Lenovo models */ 3339 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 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 3345 3346 }, 3347 3348 /* Generic keymap for Lenovo ThinkPads */ 3349 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3350 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3351 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3352 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3353 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3354 3355 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3356 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3357 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3358 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3359 3360 /* These should be enabled --only-- when ACPI video 3361 * is disabled (i.e. in "vendor" mode), and are handled 3362 * in a special way by the init code */ 3363 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3364 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3365 3366 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3367 3368 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3369 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3370 3371 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3372 * react to it and reprograms the built-in *extra* mixer. 3373 * Never map it to control another mixer by default. 3374 * 3375 * T60?, T61, R60?, R61: firmware and EC tries to send 3376 * these over the regular keyboard, so these are no-ops, 3377 * but there are still weird bugs re. MUTE, so do not 3378 * change unless you get test reports from all Lenovo 3379 * models. May cause the BIOS to interfere with the 3380 * HDA mixer. 3381 */ 3382 KEY_RESERVED, /* 0x14: VOLUME UP */ 3383 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3384 KEY_RESERVED, /* 0x16: MUTE */ 3385 3386 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3387 3388 /* (assignments unknown, please report if found) */ 3389 KEY_UNKNOWN, KEY_UNKNOWN, 3390 3391 /* 3392 * The mic mute button only sends 0x1a. It does not 3393 * automatically mute the mic or change the mute light. 3394 */ 3395 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3396 3397 /* (assignments unknown, please report if found) */ 3398 KEY_UNKNOWN, 3399 3400 /* Extra keys in use since the X240 / T440 / T540 */ 3401 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3402 3403 /* 3404 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3405 * The first item in this list is the Mute button which is 3406 * emitted with 0x103 through 3407 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3408 * symbol is held. 3409 * We'll need to offset those by 0x20. 3410 */ 3411 KEY_RESERVED, /* Mute held, 0x103 */ 3412 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3413 KEY_RESERVED, /* Clipping tool */ 3414 KEY_RESERVED, /* Cloud */ 3415 KEY_RESERVED, 3416 KEY_VOICECOMMAND, /* Voice */ 3417 KEY_RESERVED, 3418 KEY_RESERVED, /* Gestures */ 3419 KEY_RESERVED, 3420 KEY_RESERVED, 3421 KEY_RESERVED, 3422 KEY_CONFIG, /* Settings */ 3423 KEY_RESERVED, /* New tab */ 3424 KEY_REFRESH, /* Reload */ 3425 KEY_BACK, /* Back */ 3426 KEY_RESERVED, /* Microphone down */ 3427 KEY_RESERVED, /* Microphone up */ 3428 KEY_RESERVED, /* Microphone cancellation */ 3429 KEY_RESERVED, /* Camera mode */ 3430 KEY_RESERVED, /* Rotate display, 0x116 */ 3431 3432 /* 3433 * These are found in 2017 models (e.g. T470s, X270). 3434 * The lowest known value is 0x311, which according to 3435 * the manual should launch a user defined favorite 3436 * application. 3437 * 3438 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START, 3439 * corresponding to 0x34. 3440 */ 3441 3442 /* (assignments unknown, please report if found) */ 3443 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 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, 3448 3449 KEY_BOOKMARKS, /* Favorite app, 0x311 */ 3450 KEY_RESERVED, /* Clipping tool */ 3451 KEY_CALC, /* Calculator (above numpad, P52) */ 3452 KEY_BLUETOOTH, /* Bluetooth */ 3453 KEY_KEYBOARD /* Keyboard, 0x315 */ 3454 }, 3455 }; 3456 3457 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3458 /* Generic maps (fallback) */ 3459 { 3460 .vendor = PCI_VENDOR_ID_IBM, 3461 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3462 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3463 }, 3464 { 3465 .vendor = PCI_VENDOR_ID_LENOVO, 3466 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3467 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3468 }, 3469 }; 3470 3471 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3472 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3473 3474 int res, i; 3475 int status; 3476 int hkeyv; 3477 bool radiosw_state = false; 3478 bool tabletsw_state = false; 3479 3480 unsigned long quirks; 3481 unsigned long keymap_id; 3482 3483 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3484 "initializing hotkey subdriver\n"); 3485 3486 BUG_ON(!tpacpi_inputdev); 3487 BUG_ON(tpacpi_inputdev->open != NULL || 3488 tpacpi_inputdev->close != NULL); 3489 3490 TPACPI_ACPIHANDLE_INIT(hkey); 3491 mutex_init(&hotkey_mutex); 3492 3493 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3494 mutex_init(&hotkey_thread_data_mutex); 3495 #endif 3496 3497 /* hotkey not supported on 570 */ 3498 tp_features.hotkey = hkey_handle != NULL; 3499 3500 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3501 "hotkeys are %s\n", 3502 str_supported(tp_features.hotkey)); 3503 3504 if (!tp_features.hotkey) 3505 return 1; 3506 3507 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3508 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3509 3510 tpacpi_disable_brightness_delay(); 3511 3512 /* MUST have enough space for all attributes to be added to 3513 * hotkey_dev_attributes */ 3514 hotkey_dev_attributes = create_attr_set( 3515 ARRAY_SIZE(hotkey_attributes) + 2, 3516 NULL); 3517 if (!hotkey_dev_attributes) 3518 return -ENOMEM; 3519 res = add_many_to_attr_set(hotkey_dev_attributes, 3520 hotkey_attributes, 3521 ARRAY_SIZE(hotkey_attributes)); 3522 if (res) 3523 goto err_exit; 3524 3525 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3526 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3527 for HKEY interface version 0x100 */ 3528 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3529 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3530 "firmware HKEY interface version: 0x%x\n", 3531 hkeyv); 3532 3533 switch (hkeyv >> 8) { 3534 case 1: 3535 /* 3536 * MHKV 0x100 in A31, R40, R40e, 3537 * T4x, X31, and later 3538 */ 3539 3540 /* Paranoia check AND init hotkey_all_mask */ 3541 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3542 "MHKA", "qd")) { 3543 pr_err("missing MHKA handler, please report this to %s\n", 3544 TPACPI_MAIL); 3545 /* Fallback: pre-init for FN+F3,F4,F12 */ 3546 hotkey_all_mask = 0x080cU; 3547 } else { 3548 tp_features.hotkey_mask = 1; 3549 } 3550 break; 3551 3552 case 2: 3553 /* 3554 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3555 */ 3556 3557 /* Paranoia check AND init hotkey_all_mask */ 3558 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3559 "MHKA", "dd", 1)) { 3560 pr_err("missing MHKA handler, please report this to %s\n", 3561 TPACPI_MAIL); 3562 /* Fallback: pre-init for FN+F3,F4,F12 */ 3563 hotkey_all_mask = 0x080cU; 3564 } else { 3565 tp_features.hotkey_mask = 1; 3566 } 3567 3568 /* 3569 * Check if we have an adaptive keyboard, like on the 3570 * Lenovo Carbon X1 2014 (2nd Gen). 3571 */ 3572 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3573 "MHKA", "dd", 2)) { 3574 if (hotkey_adaptive_all_mask != 0) { 3575 tp_features.has_adaptive_kbd = true; 3576 res = sysfs_create_group( 3577 &tpacpi_pdev->dev.kobj, 3578 &adaptive_kbd_attr_group); 3579 if (res) 3580 goto err_exit; 3581 } 3582 } else { 3583 tp_features.has_adaptive_kbd = false; 3584 hotkey_adaptive_all_mask = 0x0U; 3585 } 3586 break; 3587 3588 default: 3589 pr_err("unknown version of the HKEY interface: 0x%x\n", 3590 hkeyv); 3591 pr_err("please report this to %s\n", TPACPI_MAIL); 3592 break; 3593 } 3594 } 3595 3596 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3597 "hotkey masks are %s\n", 3598 str_supported(tp_features.hotkey_mask)); 3599 3600 /* Init hotkey_all_mask if not initialized yet */ 3601 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3602 (quirks & TPACPI_HK_Q_INIMASK)) 3603 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3604 3605 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3606 if (tp_features.hotkey_mask) { 3607 /* hotkey_source_mask *must* be zero for 3608 * the first hotkey_mask_get to return hotkey_orig_mask */ 3609 res = hotkey_mask_get(); 3610 if (res) 3611 goto err_exit; 3612 3613 hotkey_orig_mask = hotkey_acpi_mask; 3614 } else { 3615 hotkey_orig_mask = hotkey_all_mask; 3616 hotkey_acpi_mask = hotkey_all_mask; 3617 } 3618 3619 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3620 if (dbg_wlswemul) { 3621 tp_features.hotkey_wlsw = 1; 3622 radiosw_state = !!tpacpi_wlsw_emulstate; 3623 pr_info("radio switch emulation enabled\n"); 3624 } else 3625 #endif 3626 /* Not all thinkpads have a hardware radio switch */ 3627 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3628 tp_features.hotkey_wlsw = 1; 3629 radiosw_state = !!status; 3630 pr_info("radio switch found; radios are %s\n", 3631 enabled(status, 0)); 3632 } 3633 if (tp_features.hotkey_wlsw) 3634 res = add_to_attr_set(hotkey_dev_attributes, 3635 &dev_attr_hotkey_radio_sw.attr); 3636 3637 res = hotkey_init_tablet_mode(); 3638 if (res < 0) 3639 goto err_exit; 3640 3641 tabletsw_state = res; 3642 3643 res = register_attr_set_with_sysfs(hotkey_dev_attributes, 3644 &tpacpi_pdev->dev.kobj); 3645 if (res) 3646 goto err_exit; 3647 3648 /* Set up key map */ 3649 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3650 ARRAY_SIZE(tpacpi_keymap_qtable)); 3651 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3652 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3653 "using keymap number %lu\n", keymap_id); 3654 3655 hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id], 3656 TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL); 3657 if (!hotkey_keycode_map) { 3658 pr_err("failed to allocate memory for key map\n"); 3659 res = -ENOMEM; 3660 goto err_exit; 3661 } 3662 3663 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3664 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3665 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3666 tpacpi_inputdev->keycode = hotkey_keycode_map; 3667 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3668 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3669 input_set_capability(tpacpi_inputdev, EV_KEY, 3670 hotkey_keycode_map[i]); 3671 } else { 3672 if (i < sizeof(hotkey_reserved_mask)*8) 3673 hotkey_reserved_mask |= 1 << i; 3674 } 3675 } 3676 3677 if (tp_features.hotkey_wlsw) { 3678 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3679 input_report_switch(tpacpi_inputdev, 3680 SW_RFKILL_ALL, radiosw_state); 3681 } 3682 if (tp_features.hotkey_tablet) { 3683 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3684 input_report_switch(tpacpi_inputdev, 3685 SW_TABLET_MODE, tabletsw_state); 3686 } 3687 3688 /* Do not issue duplicate brightness change events to 3689 * userspace. tpacpi_detect_brightness_capabilities() must have 3690 * been called before this point */ 3691 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3692 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n"); 3693 pr_notice("Disabling thinkpad-acpi brightness events by default...\n"); 3694 3695 /* Disable brightness up/down on Lenovo thinkpads when 3696 * ACPI is handling them, otherwise it is plain impossible 3697 * for userspace to do something even remotely sane */ 3698 hotkey_reserved_mask |= 3699 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3700 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3701 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3702 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3703 } 3704 3705 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3706 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3707 & ~hotkey_all_mask 3708 & ~hotkey_reserved_mask; 3709 3710 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3711 "hotkey source mask 0x%08x, polling freq %u\n", 3712 hotkey_source_mask, hotkey_poll_freq); 3713 #endif 3714 3715 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3716 "enabling firmware HKEY event interface...\n"); 3717 res = hotkey_status_set(true); 3718 if (res) { 3719 hotkey_exit(); 3720 return res; 3721 } 3722 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3723 | hotkey_driver_mask) 3724 & ~hotkey_source_mask); 3725 if (res < 0 && res != -ENXIO) { 3726 hotkey_exit(); 3727 return res; 3728 } 3729 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3730 & ~hotkey_reserved_mask; 3731 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3732 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3733 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3734 3735 tpacpi_inputdev->open = &hotkey_inputdev_open; 3736 tpacpi_inputdev->close = &hotkey_inputdev_close; 3737 3738 hotkey_poll_setup_safe(true); 3739 3740 return 0; 3741 3742 err_exit: 3743 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3744 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3745 &adaptive_kbd_attr_group); 3746 3747 hotkey_dev_attributes = NULL; 3748 3749 return (res < 0) ? res : 1; 3750 } 3751 3752 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3753 * mode, Web conference mode, Function mode and Lay-flat mode. 3754 * We support Home mode and Function mode currently. 3755 * 3756 * Will consider support rest of modes in future. 3757 * 3758 */ 3759 static const int adaptive_keyboard_modes[] = { 3760 HOME_MODE, 3761 /* WEB_BROWSER_MODE = 2, 3762 WEB_CONFERENCE_MODE = 3, */ 3763 FUNCTION_MODE 3764 }; 3765 3766 #define DFR_CHANGE_ROW 0x101 3767 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3768 #define FIRST_ADAPTIVE_KEY 0x103 3769 3770 /* press Fn key a while second, it will switch to Function Mode. Then 3771 * release Fn key, previous mode be restored. 3772 */ 3773 static bool adaptive_keyboard_mode_is_saved; 3774 static int adaptive_keyboard_prev_mode; 3775 3776 static int adaptive_keyboard_get_mode(void) 3777 { 3778 int mode = 0; 3779 3780 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3781 pr_err("Cannot read adaptive keyboard mode\n"); 3782 return -EIO; 3783 } 3784 3785 return mode; 3786 } 3787 3788 static int adaptive_keyboard_set_mode(int new_mode) 3789 { 3790 if (new_mode < 0 || 3791 new_mode > LAYFLAT_MODE) 3792 return -EINVAL; 3793 3794 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3795 pr_err("Cannot set adaptive keyboard mode\n"); 3796 return -EIO; 3797 } 3798 3799 return 0; 3800 } 3801 3802 static int adaptive_keyboard_get_next_mode(int mode) 3803 { 3804 size_t i; 3805 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3806 3807 for (i = 0; i <= max_mode; i++) { 3808 if (adaptive_keyboard_modes[i] == mode) 3809 break; 3810 } 3811 3812 if (i >= max_mode) 3813 i = 0; 3814 else 3815 i++; 3816 3817 return adaptive_keyboard_modes[i]; 3818 } 3819 3820 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3821 { 3822 int current_mode = 0; 3823 int new_mode = 0; 3824 int keycode; 3825 3826 switch (scancode) { 3827 case DFR_CHANGE_ROW: 3828 if (adaptive_keyboard_mode_is_saved) { 3829 new_mode = adaptive_keyboard_prev_mode; 3830 adaptive_keyboard_mode_is_saved = false; 3831 } else { 3832 current_mode = adaptive_keyboard_get_mode(); 3833 if (current_mode < 0) 3834 return false; 3835 new_mode = adaptive_keyboard_get_next_mode( 3836 current_mode); 3837 } 3838 3839 if (adaptive_keyboard_set_mode(new_mode) < 0) 3840 return false; 3841 3842 return true; 3843 3844 case DFR_SHOW_QUICKVIEW_ROW: 3845 current_mode = adaptive_keyboard_get_mode(); 3846 if (current_mode < 0) 3847 return false; 3848 3849 adaptive_keyboard_prev_mode = current_mode; 3850 adaptive_keyboard_mode_is_saved = true; 3851 3852 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3853 return false; 3854 return true; 3855 3856 default: 3857 if (scancode < FIRST_ADAPTIVE_KEY || 3858 scancode >= FIRST_ADAPTIVE_KEY + 3859 TP_ACPI_HOTKEYSCAN_EXTENDED_START - 3860 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3861 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3862 scancode); 3863 return false; 3864 } 3865 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + 3866 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START]; 3867 if (keycode != KEY_RESERVED) { 3868 mutex_lock(&tpacpi_inputdev_send_mutex); 3869 3870 input_report_key(tpacpi_inputdev, keycode, 1); 3871 input_sync(tpacpi_inputdev); 3872 3873 input_report_key(tpacpi_inputdev, keycode, 0); 3874 input_sync(tpacpi_inputdev); 3875 3876 mutex_unlock(&tpacpi_inputdev_send_mutex); 3877 } 3878 return true; 3879 } 3880 } 3881 3882 static bool hotkey_notify_hotkey(const u32 hkey, 3883 bool *send_acpi_ev, 3884 bool *ignore_acpi_ev) 3885 { 3886 /* 0x1000-0x1FFF: key presses */ 3887 unsigned int scancode = hkey & 0xfff; 3888 *send_acpi_ev = true; 3889 *ignore_acpi_ev = false; 3890 3891 /* 3892 * Original events are in the 0x10XX range, the adaptive keyboard 3893 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017 3894 * models, additional keys are emitted through 0x13XX. 3895 */ 3896 switch ((hkey >> 8) & 0xf) { 3897 case 0: 3898 if (scancode > 0 && 3899 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3900 /* HKEY event 0x1001 is scancode 0x00 */ 3901 scancode--; 3902 if (!(hotkey_source_mask & (1 << scancode))) { 3903 tpacpi_input_send_key_masked(scancode); 3904 *send_acpi_ev = false; 3905 } else { 3906 *ignore_acpi_ev = true; 3907 } 3908 return true; 3909 } 3910 break; 3911 3912 case 1: 3913 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3914 3915 case 3: 3916 /* Extended keycodes start at 0x300 and our offset into the map 3917 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode 3918 * will be positive, but might not be in the correct range. 3919 */ 3920 scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START); 3921 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START && 3922 scancode < TPACPI_HOTKEY_MAP_LEN) { 3923 tpacpi_input_send_key(scancode); 3924 return true; 3925 } 3926 break; 3927 } 3928 3929 return false; 3930 } 3931 3932 static bool hotkey_notify_wakeup(const u32 hkey, 3933 bool *send_acpi_ev, 3934 bool *ignore_acpi_ev) 3935 { 3936 /* 0x2000-0x2FFF: Wakeup reason */ 3937 *send_acpi_ev = true; 3938 *ignore_acpi_ev = false; 3939 3940 switch (hkey) { 3941 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3942 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3943 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3944 *ignore_acpi_ev = true; 3945 break; 3946 3947 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3948 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3949 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3950 *ignore_acpi_ev = true; 3951 break; 3952 3953 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3954 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3955 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3956 /* how to auto-heal: */ 3957 /* 2313: woke up from S3, go to S4/S5 */ 3958 /* 2413: woke up from S4, go to S5 */ 3959 break; 3960 3961 default: 3962 return false; 3963 } 3964 3965 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3966 pr_info("woke up due to a hot-unplug request...\n"); 3967 hotkey_wakeup_reason_notify_change(); 3968 } 3969 return true; 3970 } 3971 3972 static bool hotkey_notify_dockevent(const u32 hkey, 3973 bool *send_acpi_ev, 3974 bool *ignore_acpi_ev) 3975 { 3976 /* 0x4000-0x4FFF: dock-related events */ 3977 *send_acpi_ev = true; 3978 *ignore_acpi_ev = false; 3979 3980 switch (hkey) { 3981 case TP_HKEY_EV_UNDOCK_ACK: 3982 /* ACPI undock operation completed after wakeup */ 3983 hotkey_autosleep_ack = 1; 3984 pr_info("undocked\n"); 3985 hotkey_wakeup_hotunplug_complete_notify_change(); 3986 return true; 3987 3988 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3989 pr_info("docked into hotplug port replicator\n"); 3990 return true; 3991 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3992 pr_info("undocked from hotplug port replicator\n"); 3993 return true; 3994 3995 default: 3996 return false; 3997 } 3998 } 3999 4000 static bool hotkey_notify_usrevent(const u32 hkey, 4001 bool *send_acpi_ev, 4002 bool *ignore_acpi_ev) 4003 { 4004 /* 0x5000-0x5FFF: human interface helpers */ 4005 *send_acpi_ev = true; 4006 *ignore_acpi_ev = false; 4007 4008 switch (hkey) { 4009 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 4010 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 4011 return true; 4012 4013 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 4014 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 4015 tpacpi_input_send_tabletsw(); 4016 hotkey_tablet_mode_notify_change(); 4017 *send_acpi_ev = false; 4018 return true; 4019 4020 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 4021 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 4022 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 4023 /* do not propagate these events */ 4024 *ignore_acpi_ev = true; 4025 return true; 4026 4027 default: 4028 return false; 4029 } 4030 } 4031 4032 static void thermal_dump_all_sensors(void); 4033 4034 static bool hotkey_notify_6xxx(const u32 hkey, 4035 bool *send_acpi_ev, 4036 bool *ignore_acpi_ev) 4037 { 4038 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 4039 *send_acpi_ev = true; 4040 *ignore_acpi_ev = false; 4041 4042 switch (hkey) { 4043 case TP_HKEY_EV_THM_TABLE_CHANGED: 4044 pr_debug("EC reports: Thermal Table has changed\n"); 4045 /* recommended action: do nothing, we don't have 4046 * Lenovo ATM information */ 4047 return true; 4048 case TP_HKEY_EV_THM_CSM_COMPLETED: 4049 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n"); 4050 /* recommended action: do nothing, we don't have 4051 * Lenovo ATM information */ 4052 return true; 4053 case TP_HKEY_EV_THM_TRANSFM_CHANGED: 4054 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n"); 4055 /* recommended action: do nothing, we don't have 4056 * Lenovo ATM information */ 4057 return true; 4058 case TP_HKEY_EV_ALARM_BAT_HOT: 4059 pr_crit("THERMAL ALARM: battery is too hot!\n"); 4060 /* recommended action: warn user through gui */ 4061 break; 4062 case TP_HKEY_EV_ALARM_BAT_XHOT: 4063 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 4064 /* recommended action: immediate sleep/hibernate */ 4065 break; 4066 case TP_HKEY_EV_ALARM_SENSOR_HOT: 4067 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n"); 4068 /* recommended action: warn user through gui, that */ 4069 /* some internal component is too hot */ 4070 break; 4071 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 4072 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n"); 4073 /* recommended action: immediate sleep/hibernate */ 4074 break; 4075 case TP_HKEY_EV_AC_CHANGED: 4076 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 4077 * AC status changed; can be triggered by plugging or 4078 * unplugging AC adapter, docking or undocking. */ 4079 4080 /* fallthrough */ 4081 4082 case TP_HKEY_EV_KEY_NUMLOCK: 4083 case TP_HKEY_EV_KEY_FN: 4084 case TP_HKEY_EV_KEY_FN_ESC: 4085 /* key press events, we just ignore them as long as the EC 4086 * is still reporting them in the normal keyboard stream */ 4087 *send_acpi_ev = false; 4088 *ignore_acpi_ev = true; 4089 return true; 4090 4091 case TP_HKEY_EV_TABLET_CHANGED: 4092 tpacpi_input_send_tabletsw(); 4093 hotkey_tablet_mode_notify_change(); 4094 *send_acpi_ev = false; 4095 return true; 4096 4097 case TP_HKEY_EV_PALM_DETECTED: 4098 case TP_HKEY_EV_PALM_UNDETECTED: 4099 /* palm detected hovering the keyboard, forward to user-space 4100 * via netlink for consumption */ 4101 return true; 4102 4103 default: 4104 /* report simply as unknown, no sensor dump */ 4105 return false; 4106 } 4107 4108 thermal_dump_all_sensors(); 4109 return true; 4110 } 4111 4112 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 4113 { 4114 u32 hkey; 4115 bool send_acpi_ev; 4116 bool ignore_acpi_ev; 4117 bool known_ev; 4118 4119 if (event != 0x80) { 4120 pr_err("unknown HKEY notification event %d\n", event); 4121 /* forward it to userspace, maybe it knows how to handle it */ 4122 acpi_bus_generate_netlink_event( 4123 ibm->acpi->device->pnp.device_class, 4124 dev_name(&ibm->acpi->device->dev), 4125 event, 0); 4126 return; 4127 } 4128 4129 while (1) { 4130 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 4131 pr_err("failed to retrieve HKEY event\n"); 4132 return; 4133 } 4134 4135 if (hkey == 0) { 4136 /* queue empty */ 4137 return; 4138 } 4139 4140 send_acpi_ev = true; 4141 ignore_acpi_ev = false; 4142 4143 switch (hkey >> 12) { 4144 case 1: 4145 /* 0x1000-0x1FFF: key presses */ 4146 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 4147 &ignore_acpi_ev); 4148 break; 4149 case 2: 4150 /* 0x2000-0x2FFF: Wakeup reason */ 4151 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 4152 &ignore_acpi_ev); 4153 break; 4154 case 3: 4155 /* 0x3000-0x3FFF: bay-related wakeups */ 4156 switch (hkey) { 4157 case TP_HKEY_EV_BAYEJ_ACK: 4158 hotkey_autosleep_ack = 1; 4159 pr_info("bay ejected\n"); 4160 hotkey_wakeup_hotunplug_complete_notify_change(); 4161 known_ev = true; 4162 break; 4163 case TP_HKEY_EV_OPTDRV_EJ: 4164 /* FIXME: kick libata if SATA link offline */ 4165 known_ev = true; 4166 break; 4167 default: 4168 known_ev = false; 4169 } 4170 break; 4171 case 4: 4172 /* 0x4000-0x4FFF: dock-related events */ 4173 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 4174 &ignore_acpi_ev); 4175 break; 4176 case 5: 4177 /* 0x5000-0x5FFF: human interface helpers */ 4178 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 4179 &ignore_acpi_ev); 4180 break; 4181 case 6: 4182 /* 0x6000-0x6FFF: thermal alarms/notices and 4183 * keyboard events */ 4184 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 4185 &ignore_acpi_ev); 4186 break; 4187 case 7: 4188 /* 0x7000-0x7FFF: misc */ 4189 if (tp_features.hotkey_wlsw && 4190 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 4191 tpacpi_send_radiosw_update(); 4192 send_acpi_ev = 0; 4193 known_ev = true; 4194 break; 4195 } 4196 /* fallthrough - to default */ 4197 default: 4198 known_ev = false; 4199 } 4200 if (!known_ev) { 4201 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4202 pr_notice("please report the conditions when this event happened to %s\n", 4203 TPACPI_MAIL); 4204 } 4205 4206 /* netlink events */ 4207 if (!ignore_acpi_ev && send_acpi_ev) { 4208 acpi_bus_generate_netlink_event( 4209 ibm->acpi->device->pnp.device_class, 4210 dev_name(&ibm->acpi->device->dev), 4211 event, hkey); 4212 } 4213 } 4214 } 4215 4216 static void hotkey_suspend(void) 4217 { 4218 /* Do these on suspend, we get the events on early resume! */ 4219 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4220 hotkey_autosleep_ack = 0; 4221 4222 /* save previous mode of adaptive keyboard of X1 Carbon */ 4223 if (tp_features.has_adaptive_kbd) { 4224 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4225 "GTRW", "dd", 0)) { 4226 pr_err("Cannot read adaptive keyboard mode.\n"); 4227 } 4228 } 4229 } 4230 4231 static void hotkey_resume(void) 4232 { 4233 tpacpi_disable_brightness_delay(); 4234 4235 if (hotkey_status_set(true) < 0 || 4236 hotkey_mask_set(hotkey_acpi_mask) < 0) 4237 pr_err("error while attempting to reset the event firmware interface\n"); 4238 4239 tpacpi_send_radiosw_update(); 4240 hotkey_tablet_mode_notify_change(); 4241 hotkey_wakeup_reason_notify_change(); 4242 hotkey_wakeup_hotunplug_complete_notify_change(); 4243 hotkey_poll_setup_safe(false); 4244 4245 /* restore previous mode of adapive keyboard of X1 Carbon */ 4246 if (tp_features.has_adaptive_kbd) { 4247 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4248 adaptive_keyboard_prev_mode)) { 4249 pr_err("Cannot set adaptive keyboard mode.\n"); 4250 } 4251 } 4252 } 4253 4254 /* procfs -------------------------------------------------------------- */ 4255 static int hotkey_read(struct seq_file *m) 4256 { 4257 int res, status; 4258 4259 if (!tp_features.hotkey) { 4260 seq_printf(m, "status:\t\tnot supported\n"); 4261 return 0; 4262 } 4263 4264 if (mutex_lock_killable(&hotkey_mutex)) 4265 return -ERESTARTSYS; 4266 res = hotkey_status_get(&status); 4267 if (!res) 4268 res = hotkey_mask_get(); 4269 mutex_unlock(&hotkey_mutex); 4270 if (res) 4271 return res; 4272 4273 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4274 if (hotkey_all_mask) { 4275 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4276 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4277 } else { 4278 seq_printf(m, "mask:\t\tnot supported\n"); 4279 seq_printf(m, "commands:\tenable, disable, reset\n"); 4280 } 4281 4282 return 0; 4283 } 4284 4285 static void hotkey_enabledisable_warn(bool enable) 4286 { 4287 tpacpi_log_usertask("procfs hotkey enable/disable"); 4288 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4289 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n"))) 4290 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n"); 4291 } 4292 4293 static int hotkey_write(char *buf) 4294 { 4295 int res; 4296 u32 mask; 4297 char *cmd; 4298 4299 if (!tp_features.hotkey) 4300 return -ENODEV; 4301 4302 if (mutex_lock_killable(&hotkey_mutex)) 4303 return -ERESTARTSYS; 4304 4305 mask = hotkey_user_mask; 4306 4307 res = 0; 4308 while ((cmd = next_cmd(&buf))) { 4309 if (strlencmp(cmd, "enable") == 0) { 4310 hotkey_enabledisable_warn(1); 4311 } else if (strlencmp(cmd, "disable") == 0) { 4312 hotkey_enabledisable_warn(0); 4313 res = -EPERM; 4314 } else if (strlencmp(cmd, "reset") == 0) { 4315 mask = (hotkey_all_mask | hotkey_source_mask) 4316 & ~hotkey_reserved_mask; 4317 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4318 /* mask set */ 4319 } else if (sscanf(cmd, "%x", &mask) == 1) { 4320 /* mask set */ 4321 } else { 4322 res = -EINVAL; 4323 goto errexit; 4324 } 4325 } 4326 4327 if (!res) { 4328 tpacpi_disclose_usertask("procfs hotkey", 4329 "set mask to 0x%08x\n", mask); 4330 res = hotkey_user_mask_set(mask); 4331 } 4332 4333 errexit: 4334 mutex_unlock(&hotkey_mutex); 4335 return res; 4336 } 4337 4338 static const struct acpi_device_id ibm_htk_device_ids[] = { 4339 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4340 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4341 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0}, 4342 {"", 0}, 4343 }; 4344 4345 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4346 .hid = ibm_htk_device_ids, 4347 .notify = hotkey_notify, 4348 .handle = &hkey_handle, 4349 .type = ACPI_DEVICE_NOTIFY, 4350 }; 4351 4352 static struct ibm_struct hotkey_driver_data = { 4353 .name = "hotkey", 4354 .read = hotkey_read, 4355 .write = hotkey_write, 4356 .exit = hotkey_exit, 4357 .resume = hotkey_resume, 4358 .suspend = hotkey_suspend, 4359 .acpi = &ibm_hotkey_acpidriver, 4360 }; 4361 4362 /************************************************************************* 4363 * Bluetooth subdriver 4364 */ 4365 4366 enum { 4367 /* ACPI GBDC/SBDC bits */ 4368 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4369 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4370 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4371 0 = disable, 1 = enable */ 4372 }; 4373 4374 enum { 4375 /* ACPI \BLTH commands */ 4376 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4377 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4378 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4379 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4380 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4381 }; 4382 4383 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4384 4385 static int bluetooth_get_status(void) 4386 { 4387 int status; 4388 4389 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4390 if (dbg_bluetoothemul) 4391 return (tpacpi_bluetooth_emulstate) ? 4392 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4393 #endif 4394 4395 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4396 return -EIO; 4397 4398 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4399 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4400 } 4401 4402 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4403 { 4404 int status; 4405 4406 vdbg_printk(TPACPI_DBG_RFKILL, 4407 "will attempt to %s bluetooth\n", 4408 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4409 4410 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4411 if (dbg_bluetoothemul) { 4412 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4413 return 0; 4414 } 4415 #endif 4416 4417 if (state == TPACPI_RFK_RADIO_ON) 4418 status = TP_ACPI_BLUETOOTH_RADIOSSW 4419 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4420 else 4421 status = 0; 4422 4423 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4424 return -EIO; 4425 4426 return 0; 4427 } 4428 4429 /* sysfs bluetooth enable ---------------------------------------------- */ 4430 static ssize_t bluetooth_enable_show(struct device *dev, 4431 struct device_attribute *attr, 4432 char *buf) 4433 { 4434 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4435 attr, buf); 4436 } 4437 4438 static ssize_t bluetooth_enable_store(struct device *dev, 4439 struct device_attribute *attr, 4440 const char *buf, size_t count) 4441 { 4442 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4443 attr, buf, count); 4444 } 4445 4446 static DEVICE_ATTR_RW(bluetooth_enable); 4447 4448 /* --------------------------------------------------------------------- */ 4449 4450 static struct attribute *bluetooth_attributes[] = { 4451 &dev_attr_bluetooth_enable.attr, 4452 NULL 4453 }; 4454 4455 static const struct attribute_group bluetooth_attr_group = { 4456 .attrs = bluetooth_attributes, 4457 }; 4458 4459 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4460 .get_status = bluetooth_get_status, 4461 .set_status = bluetooth_set_status, 4462 }; 4463 4464 static void bluetooth_shutdown(void) 4465 { 4466 /* Order firmware to save current state to NVRAM */ 4467 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4468 TP_ACPI_BLTH_SAVE_STATE)) 4469 pr_notice("failed to save bluetooth state to NVRAM\n"); 4470 else 4471 vdbg_printk(TPACPI_DBG_RFKILL, 4472 "bluetooth state saved to NVRAM\n"); 4473 } 4474 4475 static void bluetooth_exit(void) 4476 { 4477 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4478 &bluetooth_attr_group); 4479 4480 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4481 4482 bluetooth_shutdown(); 4483 } 4484 4485 static const struct dmi_system_id bt_fwbug_list[] __initconst = { 4486 { 4487 .ident = "ThinkPad E485", 4488 .matches = { 4489 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4490 DMI_MATCH(DMI_BOARD_NAME, "20KU"), 4491 }, 4492 }, 4493 { 4494 .ident = "ThinkPad E585", 4495 .matches = { 4496 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4497 DMI_MATCH(DMI_BOARD_NAME, "20KV"), 4498 }, 4499 }, 4500 { 4501 .ident = "ThinkPad A285 - 20MW", 4502 .matches = { 4503 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4504 DMI_MATCH(DMI_BOARD_NAME, "20MW"), 4505 }, 4506 }, 4507 { 4508 .ident = "ThinkPad A285 - 20MX", 4509 .matches = { 4510 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4511 DMI_MATCH(DMI_BOARD_NAME, "20MX"), 4512 }, 4513 }, 4514 { 4515 .ident = "ThinkPad A485 - 20MU", 4516 .matches = { 4517 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4518 DMI_MATCH(DMI_BOARD_NAME, "20MU"), 4519 }, 4520 }, 4521 { 4522 .ident = "ThinkPad A485 - 20MV", 4523 .matches = { 4524 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4525 DMI_MATCH(DMI_BOARD_NAME, "20MV"), 4526 }, 4527 }, 4528 {} 4529 }; 4530 4531 static const struct pci_device_id fwbug_cards_ids[] __initconst = { 4532 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) }, 4533 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) }, 4534 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) }, 4535 {} 4536 }; 4537 4538 4539 static int __init have_bt_fwbug(void) 4540 { 4541 /* 4542 * Some AMD based ThinkPads have a firmware bug that calling 4543 * "GBDC" will cause bluetooth on Intel wireless cards blocked 4544 */ 4545 if (dmi_check_system(bt_fwbug_list) && pci_dev_present(fwbug_cards_ids)) { 4546 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4547 FW_BUG "disable bluetooth subdriver for Intel cards\n"); 4548 return 1; 4549 } else 4550 return 0; 4551 } 4552 4553 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4554 { 4555 int res; 4556 int status = 0; 4557 4558 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4559 "initializing bluetooth subdriver\n"); 4560 4561 TPACPI_ACPIHANDLE_INIT(hkey); 4562 4563 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4564 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4565 tp_features.bluetooth = !have_bt_fwbug() && hkey_handle && 4566 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4567 4568 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4569 "bluetooth is %s, status 0x%02x\n", 4570 str_supported(tp_features.bluetooth), 4571 status); 4572 4573 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4574 if (dbg_bluetoothemul) { 4575 tp_features.bluetooth = 1; 4576 pr_info("bluetooth switch emulation enabled\n"); 4577 } else 4578 #endif 4579 if (tp_features.bluetooth && 4580 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4581 /* no bluetooth hardware present in system */ 4582 tp_features.bluetooth = 0; 4583 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4584 "bluetooth hardware not installed\n"); 4585 } 4586 4587 if (!tp_features.bluetooth) 4588 return 1; 4589 4590 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4591 &bluetooth_tprfk_ops, 4592 RFKILL_TYPE_BLUETOOTH, 4593 TPACPI_RFK_BLUETOOTH_SW_NAME, 4594 true); 4595 if (res) 4596 return res; 4597 4598 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4599 &bluetooth_attr_group); 4600 if (res) { 4601 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4602 return res; 4603 } 4604 4605 return 0; 4606 } 4607 4608 /* procfs -------------------------------------------------------------- */ 4609 static int bluetooth_read(struct seq_file *m) 4610 { 4611 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4612 } 4613 4614 static int bluetooth_write(char *buf) 4615 { 4616 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4617 } 4618 4619 static struct ibm_struct bluetooth_driver_data = { 4620 .name = "bluetooth", 4621 .read = bluetooth_read, 4622 .write = bluetooth_write, 4623 .exit = bluetooth_exit, 4624 .shutdown = bluetooth_shutdown, 4625 }; 4626 4627 /************************************************************************* 4628 * Wan subdriver 4629 */ 4630 4631 enum { 4632 /* ACPI GWAN/SWAN bits */ 4633 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4634 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4635 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4636 0 = disable, 1 = enable */ 4637 }; 4638 4639 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4640 4641 static int wan_get_status(void) 4642 { 4643 int status; 4644 4645 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4646 if (dbg_wwanemul) 4647 return (tpacpi_wwan_emulstate) ? 4648 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4649 #endif 4650 4651 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4652 return -EIO; 4653 4654 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4655 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4656 } 4657 4658 static int wan_set_status(enum tpacpi_rfkill_state state) 4659 { 4660 int status; 4661 4662 vdbg_printk(TPACPI_DBG_RFKILL, 4663 "will attempt to %s wwan\n", 4664 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4665 4666 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4667 if (dbg_wwanemul) { 4668 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4669 return 0; 4670 } 4671 #endif 4672 4673 if (state == TPACPI_RFK_RADIO_ON) 4674 status = TP_ACPI_WANCARD_RADIOSSW 4675 | TP_ACPI_WANCARD_RESUMECTRL; 4676 else 4677 status = 0; 4678 4679 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4680 return -EIO; 4681 4682 return 0; 4683 } 4684 4685 /* sysfs wan enable ---------------------------------------------------- */ 4686 static ssize_t wan_enable_show(struct device *dev, 4687 struct device_attribute *attr, 4688 char *buf) 4689 { 4690 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4691 attr, buf); 4692 } 4693 4694 static ssize_t wan_enable_store(struct device *dev, 4695 struct device_attribute *attr, 4696 const char *buf, size_t count) 4697 { 4698 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4699 attr, buf, count); 4700 } 4701 4702 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4703 wan_enable_show, wan_enable_store); 4704 4705 /* --------------------------------------------------------------------- */ 4706 4707 static struct attribute *wan_attributes[] = { 4708 &dev_attr_wwan_enable.attr, 4709 NULL 4710 }; 4711 4712 static const struct attribute_group wan_attr_group = { 4713 .attrs = wan_attributes, 4714 }; 4715 4716 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4717 .get_status = wan_get_status, 4718 .set_status = wan_set_status, 4719 }; 4720 4721 static void wan_shutdown(void) 4722 { 4723 /* Order firmware to save current state to NVRAM */ 4724 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4725 TP_ACPI_WGSV_SAVE_STATE)) 4726 pr_notice("failed to save WWAN state to NVRAM\n"); 4727 else 4728 vdbg_printk(TPACPI_DBG_RFKILL, 4729 "WWAN state saved to NVRAM\n"); 4730 } 4731 4732 static void wan_exit(void) 4733 { 4734 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4735 &wan_attr_group); 4736 4737 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4738 4739 wan_shutdown(); 4740 } 4741 4742 static int __init wan_init(struct ibm_init_struct *iibm) 4743 { 4744 int res; 4745 int status = 0; 4746 4747 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4748 "initializing wan subdriver\n"); 4749 4750 TPACPI_ACPIHANDLE_INIT(hkey); 4751 4752 tp_features.wan = hkey_handle && 4753 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4754 4755 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4756 "wan is %s, status 0x%02x\n", 4757 str_supported(tp_features.wan), 4758 status); 4759 4760 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4761 if (dbg_wwanemul) { 4762 tp_features.wan = 1; 4763 pr_info("wwan switch emulation enabled\n"); 4764 } else 4765 #endif 4766 if (tp_features.wan && 4767 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4768 /* no wan hardware present in system */ 4769 tp_features.wan = 0; 4770 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4771 "wan hardware not installed\n"); 4772 } 4773 4774 if (!tp_features.wan) 4775 return 1; 4776 4777 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4778 &wan_tprfk_ops, 4779 RFKILL_TYPE_WWAN, 4780 TPACPI_RFK_WWAN_SW_NAME, 4781 true); 4782 if (res) 4783 return res; 4784 4785 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4786 &wan_attr_group); 4787 4788 if (res) { 4789 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4790 return res; 4791 } 4792 4793 return 0; 4794 } 4795 4796 /* procfs -------------------------------------------------------------- */ 4797 static int wan_read(struct seq_file *m) 4798 { 4799 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4800 } 4801 4802 static int wan_write(char *buf) 4803 { 4804 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4805 } 4806 4807 static struct ibm_struct wan_driver_data = { 4808 .name = "wan", 4809 .read = wan_read, 4810 .write = wan_write, 4811 .exit = wan_exit, 4812 .shutdown = wan_shutdown, 4813 }; 4814 4815 /************************************************************************* 4816 * UWB subdriver 4817 */ 4818 4819 enum { 4820 /* ACPI GUWB/SUWB bits */ 4821 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4822 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4823 }; 4824 4825 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4826 4827 static int uwb_get_status(void) 4828 { 4829 int status; 4830 4831 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4832 if (dbg_uwbemul) 4833 return (tpacpi_uwb_emulstate) ? 4834 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4835 #endif 4836 4837 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4838 return -EIO; 4839 4840 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4841 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4842 } 4843 4844 static int uwb_set_status(enum tpacpi_rfkill_state state) 4845 { 4846 int status; 4847 4848 vdbg_printk(TPACPI_DBG_RFKILL, 4849 "will attempt to %s UWB\n", 4850 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4851 4852 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4853 if (dbg_uwbemul) { 4854 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4855 return 0; 4856 } 4857 #endif 4858 4859 if (state == TPACPI_RFK_RADIO_ON) 4860 status = TP_ACPI_UWB_RADIOSSW; 4861 else 4862 status = 0; 4863 4864 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4865 return -EIO; 4866 4867 return 0; 4868 } 4869 4870 /* --------------------------------------------------------------------- */ 4871 4872 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4873 .get_status = uwb_get_status, 4874 .set_status = uwb_set_status, 4875 }; 4876 4877 static void uwb_exit(void) 4878 { 4879 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4880 } 4881 4882 static int __init uwb_init(struct ibm_init_struct *iibm) 4883 { 4884 int res; 4885 int status = 0; 4886 4887 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4888 "initializing uwb subdriver\n"); 4889 4890 TPACPI_ACPIHANDLE_INIT(hkey); 4891 4892 tp_features.uwb = hkey_handle && 4893 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4894 4895 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4896 "uwb is %s, status 0x%02x\n", 4897 str_supported(tp_features.uwb), 4898 status); 4899 4900 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4901 if (dbg_uwbemul) { 4902 tp_features.uwb = 1; 4903 pr_info("uwb switch emulation enabled\n"); 4904 } else 4905 #endif 4906 if (tp_features.uwb && 4907 !(status & TP_ACPI_UWB_HWPRESENT)) { 4908 /* no uwb hardware present in system */ 4909 tp_features.uwb = 0; 4910 dbg_printk(TPACPI_DBG_INIT, 4911 "uwb hardware not installed\n"); 4912 } 4913 4914 if (!tp_features.uwb) 4915 return 1; 4916 4917 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4918 &uwb_tprfk_ops, 4919 RFKILL_TYPE_UWB, 4920 TPACPI_RFK_UWB_SW_NAME, 4921 false); 4922 return res; 4923 } 4924 4925 static struct ibm_struct uwb_driver_data = { 4926 .name = "uwb", 4927 .exit = uwb_exit, 4928 .flags.experimental = 1, 4929 }; 4930 4931 /************************************************************************* 4932 * Video subdriver 4933 */ 4934 4935 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4936 4937 enum video_access_mode { 4938 TPACPI_VIDEO_NONE = 0, 4939 TPACPI_VIDEO_570, /* 570 */ 4940 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4941 TPACPI_VIDEO_NEW, /* all others */ 4942 }; 4943 4944 enum { /* video status flags, based on VIDEO_570 */ 4945 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4946 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4947 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4948 }; 4949 4950 enum { /* TPACPI_VIDEO_570 constants */ 4951 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4952 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4953 * video_status_flags */ 4954 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4955 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4956 }; 4957 4958 static enum video_access_mode video_supported; 4959 static int video_orig_autosw; 4960 4961 static int video_autosw_get(void); 4962 static int video_autosw_set(int enable); 4963 4964 TPACPI_HANDLE(vid, root, 4965 "\\_SB.PCI.AGP.VGA", /* 570 */ 4966 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4967 "\\_SB.PCI0.VID0", /* 770e */ 4968 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4969 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4970 "\\_SB.PCI0.AGP.VID", /* all others */ 4971 ); /* R30, R31 */ 4972 4973 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4974 4975 static int __init video_init(struct ibm_init_struct *iibm) 4976 { 4977 int ivga; 4978 4979 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4980 4981 TPACPI_ACPIHANDLE_INIT(vid); 4982 if (tpacpi_is_ibm()) 4983 TPACPI_ACPIHANDLE_INIT(vid2); 4984 4985 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4986 /* G41, assume IVGA doesn't change */ 4987 vid_handle = vid2_handle; 4988 4989 if (!vid_handle) 4990 /* video switching not supported on R30, R31 */ 4991 video_supported = TPACPI_VIDEO_NONE; 4992 else if (tpacpi_is_ibm() && 4993 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4994 /* 570 */ 4995 video_supported = TPACPI_VIDEO_570; 4996 else if (tpacpi_is_ibm() && 4997 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4998 /* 600e/x, 770e, 770x */ 4999 video_supported = TPACPI_VIDEO_770; 5000 else 5001 /* all others */ 5002 video_supported = TPACPI_VIDEO_NEW; 5003 5004 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 5005 str_supported(video_supported != TPACPI_VIDEO_NONE), 5006 video_supported); 5007 5008 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 5009 } 5010 5011 static void video_exit(void) 5012 { 5013 dbg_printk(TPACPI_DBG_EXIT, 5014 "restoring original video autoswitch mode\n"); 5015 if (video_autosw_set(video_orig_autosw)) 5016 pr_err("error while trying to restore original video autoswitch mode\n"); 5017 } 5018 5019 static int video_outputsw_get(void) 5020 { 5021 int status = 0; 5022 int i; 5023 5024 switch (video_supported) { 5025 case TPACPI_VIDEO_570: 5026 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 5027 TP_ACPI_VIDEO_570_PHSCMD)) 5028 return -EIO; 5029 status = i & TP_ACPI_VIDEO_570_PHSMASK; 5030 break; 5031 case TPACPI_VIDEO_770: 5032 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 5033 return -EIO; 5034 if (i) 5035 status |= TP_ACPI_VIDEO_S_LCD; 5036 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 5037 return -EIO; 5038 if (i) 5039 status |= TP_ACPI_VIDEO_S_CRT; 5040 break; 5041 case TPACPI_VIDEO_NEW: 5042 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 5043 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 5044 return -EIO; 5045 if (i) 5046 status |= TP_ACPI_VIDEO_S_CRT; 5047 5048 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 5049 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 5050 return -EIO; 5051 if (i) 5052 status |= TP_ACPI_VIDEO_S_LCD; 5053 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 5054 return -EIO; 5055 if (i) 5056 status |= TP_ACPI_VIDEO_S_DVI; 5057 break; 5058 default: 5059 return -ENOSYS; 5060 } 5061 5062 return status; 5063 } 5064 5065 static int video_outputsw_set(int status) 5066 { 5067 int autosw; 5068 int res = 0; 5069 5070 switch (video_supported) { 5071 case TPACPI_VIDEO_570: 5072 res = acpi_evalf(NULL, NULL, 5073 "\\_SB.PHS2", "vdd", 5074 TP_ACPI_VIDEO_570_PHS2CMD, 5075 status | TP_ACPI_VIDEO_570_PHS2SET); 5076 break; 5077 case TPACPI_VIDEO_770: 5078 autosw = video_autosw_get(); 5079 if (autosw < 0) 5080 return autosw; 5081 5082 res = video_autosw_set(1); 5083 if (res) 5084 return res; 5085 res = acpi_evalf(vid_handle, NULL, 5086 "ASWT", "vdd", status * 0x100, 0); 5087 if (!autosw && video_autosw_set(autosw)) { 5088 pr_err("video auto-switch left enabled due to error\n"); 5089 return -EIO; 5090 } 5091 break; 5092 case TPACPI_VIDEO_NEW: 5093 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 5094 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 5095 break; 5096 default: 5097 return -ENOSYS; 5098 } 5099 5100 return (res) ? 0 : -EIO; 5101 } 5102 5103 static int video_autosw_get(void) 5104 { 5105 int autosw = 0; 5106 5107 switch (video_supported) { 5108 case TPACPI_VIDEO_570: 5109 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 5110 return -EIO; 5111 break; 5112 case TPACPI_VIDEO_770: 5113 case TPACPI_VIDEO_NEW: 5114 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 5115 return -EIO; 5116 break; 5117 default: 5118 return -ENOSYS; 5119 } 5120 5121 return autosw & 1; 5122 } 5123 5124 static int video_autosw_set(int enable) 5125 { 5126 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 5127 return -EIO; 5128 return 0; 5129 } 5130 5131 static int video_outputsw_cycle(void) 5132 { 5133 int autosw = video_autosw_get(); 5134 int res; 5135 5136 if (autosw < 0) 5137 return autosw; 5138 5139 switch (video_supported) { 5140 case TPACPI_VIDEO_570: 5141 res = video_autosw_set(1); 5142 if (res) 5143 return res; 5144 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 5145 break; 5146 case TPACPI_VIDEO_770: 5147 case TPACPI_VIDEO_NEW: 5148 res = video_autosw_set(1); 5149 if (res) 5150 return res; 5151 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 5152 break; 5153 default: 5154 return -ENOSYS; 5155 } 5156 if (!autosw && video_autosw_set(autosw)) { 5157 pr_err("video auto-switch left enabled due to error\n"); 5158 return -EIO; 5159 } 5160 5161 return (res) ? 0 : -EIO; 5162 } 5163 5164 static int video_expand_toggle(void) 5165 { 5166 switch (video_supported) { 5167 case TPACPI_VIDEO_570: 5168 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 5169 0 : -EIO; 5170 case TPACPI_VIDEO_770: 5171 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 5172 0 : -EIO; 5173 case TPACPI_VIDEO_NEW: 5174 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 5175 0 : -EIO; 5176 default: 5177 return -ENOSYS; 5178 } 5179 /* not reached */ 5180 } 5181 5182 static int video_read(struct seq_file *m) 5183 { 5184 int status, autosw; 5185 5186 if (video_supported == TPACPI_VIDEO_NONE) { 5187 seq_printf(m, "status:\t\tnot supported\n"); 5188 return 0; 5189 } 5190 5191 /* Even reads can crash X.org, so... */ 5192 if (!capable(CAP_SYS_ADMIN)) 5193 return -EPERM; 5194 5195 status = video_outputsw_get(); 5196 if (status < 0) 5197 return status; 5198 5199 autosw = video_autosw_get(); 5200 if (autosw < 0) 5201 return autosw; 5202 5203 seq_printf(m, "status:\t\tsupported\n"); 5204 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 5205 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 5206 if (video_supported == TPACPI_VIDEO_NEW) 5207 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 5208 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 5209 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5210 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5211 if (video_supported == TPACPI_VIDEO_NEW) 5212 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5213 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5214 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5215 5216 return 0; 5217 } 5218 5219 static int video_write(char *buf) 5220 { 5221 char *cmd; 5222 int enable, disable, status; 5223 int res; 5224 5225 if (video_supported == TPACPI_VIDEO_NONE) 5226 return -ENODEV; 5227 5228 /* Even reads can crash X.org, let alone writes... */ 5229 if (!capable(CAP_SYS_ADMIN)) 5230 return -EPERM; 5231 5232 enable = 0; 5233 disable = 0; 5234 5235 while ((cmd = next_cmd(&buf))) { 5236 if (strlencmp(cmd, "lcd_enable") == 0) { 5237 enable |= TP_ACPI_VIDEO_S_LCD; 5238 } else if (strlencmp(cmd, "lcd_disable") == 0) { 5239 disable |= TP_ACPI_VIDEO_S_LCD; 5240 } else if (strlencmp(cmd, "crt_enable") == 0) { 5241 enable |= TP_ACPI_VIDEO_S_CRT; 5242 } else if (strlencmp(cmd, "crt_disable") == 0) { 5243 disable |= TP_ACPI_VIDEO_S_CRT; 5244 } else if (video_supported == TPACPI_VIDEO_NEW && 5245 strlencmp(cmd, "dvi_enable") == 0) { 5246 enable |= TP_ACPI_VIDEO_S_DVI; 5247 } else if (video_supported == TPACPI_VIDEO_NEW && 5248 strlencmp(cmd, "dvi_disable") == 0) { 5249 disable |= TP_ACPI_VIDEO_S_DVI; 5250 } else if (strlencmp(cmd, "auto_enable") == 0) { 5251 res = video_autosw_set(1); 5252 if (res) 5253 return res; 5254 } else if (strlencmp(cmd, "auto_disable") == 0) { 5255 res = video_autosw_set(0); 5256 if (res) 5257 return res; 5258 } else if (strlencmp(cmd, "video_switch") == 0) { 5259 res = video_outputsw_cycle(); 5260 if (res) 5261 return res; 5262 } else if (strlencmp(cmd, "expand_toggle") == 0) { 5263 res = video_expand_toggle(); 5264 if (res) 5265 return res; 5266 } else 5267 return -EINVAL; 5268 } 5269 5270 if (enable || disable) { 5271 status = video_outputsw_get(); 5272 if (status < 0) 5273 return status; 5274 res = video_outputsw_set((status & ~disable) | enable); 5275 if (res) 5276 return res; 5277 } 5278 5279 return 0; 5280 } 5281 5282 static struct ibm_struct video_driver_data = { 5283 .name = "video", 5284 .read = video_read, 5285 .write = video_write, 5286 .exit = video_exit, 5287 }; 5288 5289 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5290 5291 /************************************************************************* 5292 * Keyboard backlight subdriver 5293 */ 5294 5295 static enum led_brightness kbdlight_brightness; 5296 static DEFINE_MUTEX(kbdlight_mutex); 5297 5298 static int kbdlight_set_level(int level) 5299 { 5300 int ret = 0; 5301 5302 if (!hkey_handle) 5303 return -ENXIO; 5304 5305 mutex_lock(&kbdlight_mutex); 5306 5307 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5308 ret = -EIO; 5309 else 5310 kbdlight_brightness = level; 5311 5312 mutex_unlock(&kbdlight_mutex); 5313 5314 return ret; 5315 } 5316 5317 static int kbdlight_get_level(void) 5318 { 5319 int status = 0; 5320 5321 if (!hkey_handle) 5322 return -ENXIO; 5323 5324 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5325 return -EIO; 5326 5327 if (status < 0) 5328 return status; 5329 5330 return status & 0x3; 5331 } 5332 5333 static bool kbdlight_is_supported(void) 5334 { 5335 int status = 0; 5336 5337 if (!hkey_handle) 5338 return false; 5339 5340 if (!acpi_has_method(hkey_handle, "MLCG")) { 5341 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5342 return false; 5343 } 5344 5345 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5346 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5347 return false; 5348 } 5349 5350 if (status < 0) { 5351 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5352 return false; 5353 } 5354 5355 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5356 /* 5357 * Guessed test for keyboard backlight: 5358 * 5359 * Machines with backlight keyboard return: 5360 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5361 * b110100010010000000XX - ThinkPad x230 5362 * b010100000010000000XX - ThinkPad x240 5363 * b010100000010000000XX - ThinkPad W541 5364 * (XX is current backlight level) 5365 * 5366 * Machines without backlight keyboard return: 5367 * b10100001000000000000 - ThinkPad x230 5368 * b10110001000000000000 - ThinkPad E430 5369 * b00000000000000000000 - ThinkPad E450 5370 * 5371 * Candidate BITs for detection test (XOR): 5372 * b01000000001000000000 5373 * ^ 5374 */ 5375 return status & BIT(9); 5376 } 5377 5378 static int kbdlight_sysfs_set(struct led_classdev *led_cdev, 5379 enum led_brightness brightness) 5380 { 5381 return kbdlight_set_level(brightness); 5382 } 5383 5384 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5385 { 5386 int level; 5387 5388 level = kbdlight_get_level(); 5389 if (level < 0) 5390 return 0; 5391 5392 return level; 5393 } 5394 5395 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5396 .led_classdev = { 5397 .name = "tpacpi::kbd_backlight", 5398 .max_brightness = 2, 5399 .flags = LED_BRIGHT_HW_CHANGED, 5400 .brightness_set_blocking = &kbdlight_sysfs_set, 5401 .brightness_get = &kbdlight_sysfs_get, 5402 } 5403 }; 5404 5405 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5406 { 5407 int rc; 5408 5409 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5410 5411 TPACPI_ACPIHANDLE_INIT(hkey); 5412 5413 if (!kbdlight_is_supported()) { 5414 tp_features.kbdlight = 0; 5415 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5416 return 1; 5417 } 5418 5419 kbdlight_brightness = kbdlight_sysfs_get(NULL); 5420 tp_features.kbdlight = 1; 5421 5422 rc = led_classdev_register(&tpacpi_pdev->dev, 5423 &tpacpi_led_kbdlight.led_classdev); 5424 if (rc < 0) { 5425 tp_features.kbdlight = 0; 5426 return rc; 5427 } 5428 5429 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask | 5430 TP_ACPI_HKEY_KBD_LIGHT_MASK); 5431 return 0; 5432 } 5433 5434 static void kbdlight_exit(void) 5435 { 5436 if (tp_features.kbdlight) 5437 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5438 } 5439 5440 static int kbdlight_set_level_and_update(int level) 5441 { 5442 int ret; 5443 struct led_classdev *led_cdev; 5444 5445 ret = kbdlight_set_level(level); 5446 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5447 5448 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5449 led_cdev->brightness = level; 5450 5451 return ret; 5452 } 5453 5454 static int kbdlight_read(struct seq_file *m) 5455 { 5456 int level; 5457 5458 if (!tp_features.kbdlight) { 5459 seq_printf(m, "status:\t\tnot supported\n"); 5460 } else { 5461 level = kbdlight_get_level(); 5462 if (level < 0) 5463 seq_printf(m, "status:\t\terror %d\n", level); 5464 else 5465 seq_printf(m, "status:\t\t%d\n", level); 5466 seq_printf(m, "commands:\t0, 1, 2\n"); 5467 } 5468 5469 return 0; 5470 } 5471 5472 static int kbdlight_write(char *buf) 5473 { 5474 char *cmd; 5475 int level = -1; 5476 5477 if (!tp_features.kbdlight) 5478 return -ENODEV; 5479 5480 while ((cmd = next_cmd(&buf))) { 5481 if (strlencmp(cmd, "0") == 0) 5482 level = 0; 5483 else if (strlencmp(cmd, "1") == 0) 5484 level = 1; 5485 else if (strlencmp(cmd, "2") == 0) 5486 level = 2; 5487 else 5488 return -EINVAL; 5489 } 5490 5491 if (level == -1) 5492 return -EINVAL; 5493 5494 return kbdlight_set_level_and_update(level); 5495 } 5496 5497 static void kbdlight_suspend(void) 5498 { 5499 struct led_classdev *led_cdev; 5500 5501 if (!tp_features.kbdlight) 5502 return; 5503 5504 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5505 led_update_brightness(led_cdev); 5506 led_classdev_suspend(led_cdev); 5507 } 5508 5509 static void kbdlight_resume(void) 5510 { 5511 if (!tp_features.kbdlight) 5512 return; 5513 5514 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5515 } 5516 5517 static struct ibm_struct kbdlight_driver_data = { 5518 .name = "kbdlight", 5519 .read = kbdlight_read, 5520 .write = kbdlight_write, 5521 .suspend = kbdlight_suspend, 5522 .resume = kbdlight_resume, 5523 .exit = kbdlight_exit, 5524 }; 5525 5526 /************************************************************************* 5527 * Light (thinklight) subdriver 5528 */ 5529 5530 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5531 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5532 5533 static int light_get_status(void) 5534 { 5535 int status = 0; 5536 5537 if (tp_features.light_status) { 5538 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5539 return -EIO; 5540 return (!!status); 5541 } 5542 5543 return -ENXIO; 5544 } 5545 5546 static int light_set_status(int status) 5547 { 5548 int rc; 5549 5550 if (tp_features.light) { 5551 if (cmos_handle) { 5552 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5553 (status) ? 5554 TP_CMOS_THINKLIGHT_ON : 5555 TP_CMOS_THINKLIGHT_OFF); 5556 } else { 5557 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5558 (status) ? 1 : 0); 5559 } 5560 return (rc) ? 0 : -EIO; 5561 } 5562 5563 return -ENXIO; 5564 } 5565 5566 static int light_sysfs_set(struct led_classdev *led_cdev, 5567 enum led_brightness brightness) 5568 { 5569 return light_set_status((brightness != LED_OFF) ? 5570 TPACPI_LED_ON : TPACPI_LED_OFF); 5571 } 5572 5573 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5574 { 5575 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5576 } 5577 5578 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5579 .led_classdev = { 5580 .name = "tpacpi::thinklight", 5581 .brightness_set_blocking = &light_sysfs_set, 5582 .brightness_get = &light_sysfs_get, 5583 } 5584 }; 5585 5586 static int __init light_init(struct ibm_init_struct *iibm) 5587 { 5588 int rc; 5589 5590 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5591 5592 if (tpacpi_is_ibm()) { 5593 TPACPI_ACPIHANDLE_INIT(ledb); 5594 TPACPI_ACPIHANDLE_INIT(lght); 5595 } 5596 TPACPI_ACPIHANDLE_INIT(cmos); 5597 5598 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5599 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5600 5601 if (tp_features.light) 5602 /* light status not supported on 5603 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5604 tp_features.light_status = 5605 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5606 5607 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5608 str_supported(tp_features.light), 5609 str_supported(tp_features.light_status)); 5610 5611 if (!tp_features.light) 5612 return 1; 5613 5614 rc = led_classdev_register(&tpacpi_pdev->dev, 5615 &tpacpi_led_thinklight.led_classdev); 5616 5617 if (rc < 0) { 5618 tp_features.light = 0; 5619 tp_features.light_status = 0; 5620 } else { 5621 rc = 0; 5622 } 5623 5624 return rc; 5625 } 5626 5627 static void light_exit(void) 5628 { 5629 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5630 } 5631 5632 static int light_read(struct seq_file *m) 5633 { 5634 int status; 5635 5636 if (!tp_features.light) { 5637 seq_printf(m, "status:\t\tnot supported\n"); 5638 } else if (!tp_features.light_status) { 5639 seq_printf(m, "status:\t\tunknown\n"); 5640 seq_printf(m, "commands:\ton, off\n"); 5641 } else { 5642 status = light_get_status(); 5643 if (status < 0) 5644 return status; 5645 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5646 seq_printf(m, "commands:\ton, off\n"); 5647 } 5648 5649 return 0; 5650 } 5651 5652 static int light_write(char *buf) 5653 { 5654 char *cmd; 5655 int newstatus = 0; 5656 5657 if (!tp_features.light) 5658 return -ENODEV; 5659 5660 while ((cmd = next_cmd(&buf))) { 5661 if (strlencmp(cmd, "on") == 0) { 5662 newstatus = 1; 5663 } else if (strlencmp(cmd, "off") == 0) { 5664 newstatus = 0; 5665 } else 5666 return -EINVAL; 5667 } 5668 5669 return light_set_status(newstatus); 5670 } 5671 5672 static struct ibm_struct light_driver_data = { 5673 .name = "light", 5674 .read = light_read, 5675 .write = light_write, 5676 .exit = light_exit, 5677 }; 5678 5679 /************************************************************************* 5680 * CMOS subdriver 5681 */ 5682 5683 /* sysfs cmos_command -------------------------------------------------- */ 5684 static ssize_t cmos_command_store(struct device *dev, 5685 struct device_attribute *attr, 5686 const char *buf, size_t count) 5687 { 5688 unsigned long cmos_cmd; 5689 int res; 5690 5691 if (parse_strtoul(buf, 21, &cmos_cmd)) 5692 return -EINVAL; 5693 5694 res = issue_thinkpad_cmos_command(cmos_cmd); 5695 return (res) ? res : count; 5696 } 5697 5698 static DEVICE_ATTR_WO(cmos_command); 5699 5700 /* --------------------------------------------------------------------- */ 5701 5702 static int __init cmos_init(struct ibm_init_struct *iibm) 5703 { 5704 int res; 5705 5706 vdbg_printk(TPACPI_DBG_INIT, 5707 "initializing cmos commands subdriver\n"); 5708 5709 TPACPI_ACPIHANDLE_INIT(cmos); 5710 5711 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5712 str_supported(cmos_handle != NULL)); 5713 5714 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5715 if (res) 5716 return res; 5717 5718 return (cmos_handle) ? 0 : 1; 5719 } 5720 5721 static void cmos_exit(void) 5722 { 5723 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5724 } 5725 5726 static int cmos_read(struct seq_file *m) 5727 { 5728 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5729 R30, R31, T20-22, X20-21 */ 5730 if (!cmos_handle) 5731 seq_printf(m, "status:\t\tnot supported\n"); 5732 else { 5733 seq_printf(m, "status:\t\tsupported\n"); 5734 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5735 } 5736 5737 return 0; 5738 } 5739 5740 static int cmos_write(char *buf) 5741 { 5742 char *cmd; 5743 int cmos_cmd, res; 5744 5745 while ((cmd = next_cmd(&buf))) { 5746 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5747 cmos_cmd >= 0 && cmos_cmd <= 21) { 5748 /* cmos_cmd set */ 5749 } else 5750 return -EINVAL; 5751 5752 res = issue_thinkpad_cmos_command(cmos_cmd); 5753 if (res) 5754 return res; 5755 } 5756 5757 return 0; 5758 } 5759 5760 static struct ibm_struct cmos_driver_data = { 5761 .name = "cmos", 5762 .read = cmos_read, 5763 .write = cmos_write, 5764 .exit = cmos_exit, 5765 }; 5766 5767 /************************************************************************* 5768 * LED subdriver 5769 */ 5770 5771 enum led_access_mode { 5772 TPACPI_LED_NONE = 0, 5773 TPACPI_LED_570, /* 570 */ 5774 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5775 TPACPI_LED_NEW, /* all others */ 5776 }; 5777 5778 enum { /* For TPACPI_LED_OLD */ 5779 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5780 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5781 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5782 }; 5783 5784 static enum led_access_mode led_supported; 5785 5786 static acpi_handle led_handle; 5787 5788 #define TPACPI_LED_NUMLEDS 16 5789 static struct tpacpi_led_classdev *tpacpi_leds; 5790 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5791 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5792 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5793 "tpacpi::power", 5794 "tpacpi:orange:batt", 5795 "tpacpi:green:batt", 5796 "tpacpi::dock_active", 5797 "tpacpi::bay_active", 5798 "tpacpi::dock_batt", 5799 "tpacpi::unknown_led", 5800 "tpacpi::standby", 5801 "tpacpi::dock_status1", 5802 "tpacpi::dock_status2", 5803 "tpacpi::unknown_led2", 5804 "tpacpi::unknown_led3", 5805 "tpacpi::thinkvantage", 5806 }; 5807 #define TPACPI_SAFE_LEDS 0x1081U 5808 5809 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5810 { 5811 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5812 return false; 5813 #else 5814 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5815 #endif 5816 } 5817 5818 static int led_get_status(const unsigned int led) 5819 { 5820 int status; 5821 enum led_status_t led_s; 5822 5823 switch (led_supported) { 5824 case TPACPI_LED_570: 5825 if (!acpi_evalf(ec_handle, 5826 &status, "GLED", "dd", 1 << led)) 5827 return -EIO; 5828 led_s = (status == 0) ? 5829 TPACPI_LED_OFF : 5830 ((status == 1) ? 5831 TPACPI_LED_ON : 5832 TPACPI_LED_BLINK); 5833 tpacpi_led_state_cache[led] = led_s; 5834 return led_s; 5835 default: 5836 return -ENXIO; 5837 } 5838 5839 /* not reached */ 5840 } 5841 5842 static int led_set_status(const unsigned int led, 5843 const enum led_status_t ledstatus) 5844 { 5845 /* off, on, blink. Index is led_status_t */ 5846 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5847 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5848 5849 int rc = 0; 5850 5851 switch (led_supported) { 5852 case TPACPI_LED_570: 5853 /* 570 */ 5854 if (unlikely(led > 7)) 5855 return -EINVAL; 5856 if (unlikely(tpacpi_is_led_restricted(led))) 5857 return -EPERM; 5858 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5859 (1 << led), led_sled_arg1[ledstatus])) 5860 return -EIO; 5861 break; 5862 case TPACPI_LED_OLD: 5863 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5864 if (unlikely(led > 7)) 5865 return -EINVAL; 5866 if (unlikely(tpacpi_is_led_restricted(led))) 5867 return -EPERM; 5868 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5869 if (rc >= 0) 5870 rc = ec_write(TPACPI_LED_EC_HLBL, 5871 (ledstatus == TPACPI_LED_BLINK) << led); 5872 if (rc >= 0) 5873 rc = ec_write(TPACPI_LED_EC_HLCL, 5874 (ledstatus != TPACPI_LED_OFF) << led); 5875 break; 5876 case TPACPI_LED_NEW: 5877 /* all others */ 5878 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5879 return -EINVAL; 5880 if (unlikely(tpacpi_is_led_restricted(led))) 5881 return -EPERM; 5882 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5883 led, led_led_arg1[ledstatus])) 5884 return -EIO; 5885 break; 5886 default: 5887 return -ENXIO; 5888 } 5889 5890 if (!rc) 5891 tpacpi_led_state_cache[led] = ledstatus; 5892 5893 return rc; 5894 } 5895 5896 static int led_sysfs_set(struct led_classdev *led_cdev, 5897 enum led_brightness brightness) 5898 { 5899 struct tpacpi_led_classdev *data = container_of(led_cdev, 5900 struct tpacpi_led_classdev, led_classdev); 5901 enum led_status_t new_state; 5902 5903 if (brightness == LED_OFF) 5904 new_state = TPACPI_LED_OFF; 5905 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5906 new_state = TPACPI_LED_ON; 5907 else 5908 new_state = TPACPI_LED_BLINK; 5909 5910 return led_set_status(data->led, new_state); 5911 } 5912 5913 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5914 unsigned long *delay_on, unsigned long *delay_off) 5915 { 5916 struct tpacpi_led_classdev *data = container_of(led_cdev, 5917 struct tpacpi_led_classdev, led_classdev); 5918 5919 /* Can we choose the flash rate? */ 5920 if (*delay_on == 0 && *delay_off == 0) { 5921 /* yes. set them to the hardware blink rate (1 Hz) */ 5922 *delay_on = 500; /* ms */ 5923 *delay_off = 500; /* ms */ 5924 } else if ((*delay_on != 500) || (*delay_off != 500)) 5925 return -EINVAL; 5926 5927 return led_set_status(data->led, TPACPI_LED_BLINK); 5928 } 5929 5930 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5931 { 5932 int rc; 5933 5934 struct tpacpi_led_classdev *data = container_of(led_cdev, 5935 struct tpacpi_led_classdev, led_classdev); 5936 5937 rc = led_get_status(data->led); 5938 5939 if (rc == TPACPI_LED_OFF || rc < 0) 5940 rc = LED_OFF; /* no error handling in led class :( */ 5941 else 5942 rc = LED_FULL; 5943 5944 return rc; 5945 } 5946 5947 static void led_exit(void) 5948 { 5949 unsigned int i; 5950 5951 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5952 if (tpacpi_leds[i].led_classdev.name) 5953 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5954 } 5955 5956 kfree(tpacpi_leds); 5957 } 5958 5959 static int __init tpacpi_init_led(unsigned int led) 5960 { 5961 int rc; 5962 5963 tpacpi_leds[led].led = led; 5964 5965 /* LEDs with no name don't get registered */ 5966 if (!tpacpi_led_names[led]) 5967 return 0; 5968 5969 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set; 5970 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5971 if (led_supported == TPACPI_LED_570) 5972 tpacpi_leds[led].led_classdev.brightness_get = 5973 &led_sysfs_get; 5974 5975 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5976 5977 rc = led_classdev_register(&tpacpi_pdev->dev, 5978 &tpacpi_leds[led].led_classdev); 5979 if (rc < 0) 5980 tpacpi_leds[led].led_classdev.name = NULL; 5981 5982 return rc; 5983 } 5984 5985 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5986 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5987 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5988 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5989 5990 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5991 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5992 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5993 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5994 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5995 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5996 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5997 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5998 5999 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 6000 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 6001 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 6002 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 6003 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 6004 6005 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 6006 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 6007 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 6008 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 6009 6010 /* (1) - may have excess leds enabled on MSB */ 6011 6012 /* Defaults (order matters, keep last, don't reorder!) */ 6013 { /* Lenovo */ 6014 .vendor = PCI_VENDOR_ID_LENOVO, 6015 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 6016 .quirks = 0x1fffU, 6017 }, 6018 { /* IBM ThinkPads with no EC version string */ 6019 .vendor = PCI_VENDOR_ID_IBM, 6020 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 6021 .quirks = 0x00ffU, 6022 }, 6023 { /* IBM ThinkPads with EC version string */ 6024 .vendor = PCI_VENDOR_ID_IBM, 6025 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 6026 .quirks = 0x00bfU, 6027 }, 6028 }; 6029 6030 static enum led_access_mode __init led_init_detect_mode(void) 6031 { 6032 acpi_status status; 6033 6034 if (tpacpi_is_ibm()) { 6035 /* 570 */ 6036 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 6037 if (ACPI_SUCCESS(status)) 6038 return TPACPI_LED_570; 6039 6040 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 6041 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 6042 if (ACPI_SUCCESS(status)) 6043 return TPACPI_LED_OLD; 6044 } 6045 6046 /* most others */ 6047 status = acpi_get_handle(ec_handle, "LED", &led_handle); 6048 if (ACPI_SUCCESS(status)) 6049 return TPACPI_LED_NEW; 6050 6051 /* R30, R31, and unknown firmwares */ 6052 led_handle = NULL; 6053 return TPACPI_LED_NONE; 6054 } 6055 6056 static int __init led_init(struct ibm_init_struct *iibm) 6057 { 6058 unsigned int i; 6059 int rc; 6060 unsigned long useful_leds; 6061 6062 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 6063 6064 led_supported = led_init_detect_mode(); 6065 6066 if (led_supported != TPACPI_LED_NONE) { 6067 useful_leds = tpacpi_check_quirks(led_useful_qtable, 6068 ARRAY_SIZE(led_useful_qtable)); 6069 6070 if (!useful_leds) { 6071 led_handle = NULL; 6072 led_supported = TPACPI_LED_NONE; 6073 } 6074 } 6075 6076 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 6077 str_supported(led_supported), led_supported); 6078 6079 if (led_supported == TPACPI_LED_NONE) 6080 return 1; 6081 6082 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds), 6083 GFP_KERNEL); 6084 if (!tpacpi_leds) { 6085 pr_err("Out of memory for LED data\n"); 6086 return -ENOMEM; 6087 } 6088 6089 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 6090 tpacpi_leds[i].led = -1; 6091 6092 if (!tpacpi_is_led_restricted(i) && 6093 test_bit(i, &useful_leds)) { 6094 rc = tpacpi_init_led(i); 6095 if (rc < 0) { 6096 led_exit(); 6097 return rc; 6098 } 6099 } 6100 } 6101 6102 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 6103 pr_notice("warning: userspace override of important firmware LEDs is enabled\n"); 6104 #endif 6105 return 0; 6106 } 6107 6108 #define str_led_status(s) \ 6109 ((s) == TPACPI_LED_OFF ? "off" : \ 6110 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 6111 6112 static int led_read(struct seq_file *m) 6113 { 6114 if (!led_supported) { 6115 seq_printf(m, "status:\t\tnot supported\n"); 6116 return 0; 6117 } 6118 seq_printf(m, "status:\t\tsupported\n"); 6119 6120 if (led_supported == TPACPI_LED_570) { 6121 /* 570 */ 6122 int i, status; 6123 for (i = 0; i < 8; i++) { 6124 status = led_get_status(i); 6125 if (status < 0) 6126 return -EIO; 6127 seq_printf(m, "%d:\t\t%s\n", 6128 i, str_led_status(status)); 6129 } 6130 } 6131 6132 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 6133 6134 return 0; 6135 } 6136 6137 static int led_write(char *buf) 6138 { 6139 char *cmd; 6140 int led, rc; 6141 enum led_status_t s; 6142 6143 if (!led_supported) 6144 return -ENODEV; 6145 6146 while ((cmd = next_cmd(&buf))) { 6147 if (sscanf(cmd, "%d", &led) != 1) 6148 return -EINVAL; 6149 6150 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 6151 tpacpi_leds[led].led < 0) 6152 return -ENODEV; 6153 6154 if (strstr(cmd, "off")) { 6155 s = TPACPI_LED_OFF; 6156 } else if (strstr(cmd, "on")) { 6157 s = TPACPI_LED_ON; 6158 } else if (strstr(cmd, "blink")) { 6159 s = TPACPI_LED_BLINK; 6160 } else { 6161 return -EINVAL; 6162 } 6163 6164 rc = led_set_status(led, s); 6165 if (rc < 0) 6166 return rc; 6167 } 6168 6169 return 0; 6170 } 6171 6172 static struct ibm_struct led_driver_data = { 6173 .name = "led", 6174 .read = led_read, 6175 .write = led_write, 6176 .exit = led_exit, 6177 }; 6178 6179 /************************************************************************* 6180 * Beep subdriver 6181 */ 6182 6183 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 6184 6185 #define TPACPI_BEEP_Q1 0x0001 6186 6187 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 6188 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 6189 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 6190 }; 6191 6192 static int __init beep_init(struct ibm_init_struct *iibm) 6193 { 6194 unsigned long quirks; 6195 6196 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 6197 6198 TPACPI_ACPIHANDLE_INIT(beep); 6199 6200 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 6201 str_supported(beep_handle != NULL)); 6202 6203 quirks = tpacpi_check_quirks(beep_quirk_table, 6204 ARRAY_SIZE(beep_quirk_table)); 6205 6206 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6207 6208 return (beep_handle) ? 0 : 1; 6209 } 6210 6211 static int beep_read(struct seq_file *m) 6212 { 6213 if (!beep_handle) 6214 seq_printf(m, "status:\t\tnot supported\n"); 6215 else { 6216 seq_printf(m, "status:\t\tsupported\n"); 6217 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6218 } 6219 6220 return 0; 6221 } 6222 6223 static int beep_write(char *buf) 6224 { 6225 char *cmd; 6226 int beep_cmd; 6227 6228 if (!beep_handle) 6229 return -ENODEV; 6230 6231 while ((cmd = next_cmd(&buf))) { 6232 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6233 beep_cmd >= 0 && beep_cmd <= 17) { 6234 /* beep_cmd set */ 6235 } else 6236 return -EINVAL; 6237 if (tp_features.beep_needs_two_args) { 6238 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6239 beep_cmd, 0)) 6240 return -EIO; 6241 } else { 6242 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6243 beep_cmd)) 6244 return -EIO; 6245 } 6246 } 6247 6248 return 0; 6249 } 6250 6251 static struct ibm_struct beep_driver_data = { 6252 .name = "beep", 6253 .read = beep_read, 6254 .write = beep_write, 6255 }; 6256 6257 /************************************************************************* 6258 * Thermal subdriver 6259 */ 6260 6261 enum thermal_access_mode { 6262 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6263 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6264 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6265 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6266 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6267 }; 6268 6269 enum { /* TPACPI_THERMAL_TPEC_* */ 6270 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6271 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6272 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6273 6274 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6275 }; 6276 6277 6278 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6279 struct ibm_thermal_sensors_struct { 6280 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6281 }; 6282 6283 static enum thermal_access_mode thermal_read_mode; 6284 6285 /* idx is zero-based */ 6286 static int thermal_get_sensor(int idx, s32 *value) 6287 { 6288 int t; 6289 s8 tmp; 6290 char tmpi[5]; 6291 6292 t = TP_EC_THERMAL_TMP0; 6293 6294 switch (thermal_read_mode) { 6295 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6296 case TPACPI_THERMAL_TPEC_16: 6297 if (idx >= 8 && idx <= 15) { 6298 t = TP_EC_THERMAL_TMP8; 6299 idx -= 8; 6300 } 6301 #endif 6302 /* fallthrough */ 6303 case TPACPI_THERMAL_TPEC_8: 6304 if (idx <= 7) { 6305 if (!acpi_ec_read(t + idx, &tmp)) 6306 return -EIO; 6307 *value = tmp * 1000; 6308 return 0; 6309 } 6310 break; 6311 6312 case TPACPI_THERMAL_ACPI_UPDT: 6313 if (idx <= 7) { 6314 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6315 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6316 return -EIO; 6317 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6318 return -EIO; 6319 *value = (t - 2732) * 100; 6320 return 0; 6321 } 6322 break; 6323 6324 case TPACPI_THERMAL_ACPI_TMP07: 6325 if (idx <= 7) { 6326 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6327 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6328 return -EIO; 6329 if (t > 127 || t < -127) 6330 t = TP_EC_THERMAL_TMP_NA; 6331 *value = t * 1000; 6332 return 0; 6333 } 6334 break; 6335 6336 case TPACPI_THERMAL_NONE: 6337 default: 6338 return -ENOSYS; 6339 } 6340 6341 return -EINVAL; 6342 } 6343 6344 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6345 { 6346 int res, i; 6347 int n; 6348 6349 n = 8; 6350 i = 0; 6351 6352 if (!s) 6353 return -EINVAL; 6354 6355 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6356 n = 16; 6357 6358 for (i = 0 ; i < n; i++) { 6359 res = thermal_get_sensor(i, &s->temp[i]); 6360 if (res) 6361 return res; 6362 } 6363 6364 return n; 6365 } 6366 6367 static void thermal_dump_all_sensors(void) 6368 { 6369 int n, i; 6370 struct ibm_thermal_sensors_struct t; 6371 6372 n = thermal_get_sensors(&t); 6373 if (n <= 0) 6374 return; 6375 6376 pr_notice("temperatures (Celsius):"); 6377 6378 for (i = 0; i < n; i++) { 6379 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6380 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6381 else 6382 pr_cont(" N/A"); 6383 } 6384 6385 pr_cont("\n"); 6386 } 6387 6388 /* sysfs temp##_input -------------------------------------------------- */ 6389 6390 static ssize_t thermal_temp_input_show(struct device *dev, 6391 struct device_attribute *attr, 6392 char *buf) 6393 { 6394 struct sensor_device_attribute *sensor_attr = 6395 to_sensor_dev_attr(attr); 6396 int idx = sensor_attr->index; 6397 s32 value; 6398 int res; 6399 6400 res = thermal_get_sensor(idx, &value); 6401 if (res) 6402 return res; 6403 if (value == TPACPI_THERMAL_SENSOR_NA) 6404 return -ENXIO; 6405 6406 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6407 } 6408 6409 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6410 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6411 thermal_temp_input_show, NULL, _idxB) 6412 6413 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6414 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6415 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6416 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6417 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6418 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6419 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6420 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6421 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6422 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6423 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6424 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6425 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6426 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6427 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6428 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6429 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6430 }; 6431 6432 #define THERMAL_ATTRS(X) \ 6433 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6434 6435 static struct attribute *thermal_temp_input_attr[] = { 6436 THERMAL_ATTRS(8), 6437 THERMAL_ATTRS(9), 6438 THERMAL_ATTRS(10), 6439 THERMAL_ATTRS(11), 6440 THERMAL_ATTRS(12), 6441 THERMAL_ATTRS(13), 6442 THERMAL_ATTRS(14), 6443 THERMAL_ATTRS(15), 6444 THERMAL_ATTRS(0), 6445 THERMAL_ATTRS(1), 6446 THERMAL_ATTRS(2), 6447 THERMAL_ATTRS(3), 6448 THERMAL_ATTRS(4), 6449 THERMAL_ATTRS(5), 6450 THERMAL_ATTRS(6), 6451 THERMAL_ATTRS(7), 6452 NULL 6453 }; 6454 6455 static const struct attribute_group thermal_temp_input16_group = { 6456 .attrs = thermal_temp_input_attr 6457 }; 6458 6459 static const struct attribute_group thermal_temp_input8_group = { 6460 .attrs = &thermal_temp_input_attr[8] 6461 }; 6462 6463 #undef THERMAL_SENSOR_ATTR_TEMP 6464 #undef THERMAL_ATTRS 6465 6466 /* --------------------------------------------------------------------- */ 6467 6468 static int __init thermal_init(struct ibm_init_struct *iibm) 6469 { 6470 u8 t, ta1, ta2; 6471 int i; 6472 int acpi_tmp7; 6473 int res; 6474 6475 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6476 6477 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6478 6479 if (thinkpad_id.ec_model) { 6480 /* 6481 * Direct EC access mode: sensors at registers 6482 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6483 * non-implemented, thermal sensors return 0x80 when 6484 * not available 6485 */ 6486 6487 ta1 = ta2 = 0; 6488 for (i = 0; i < 8; i++) { 6489 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6490 ta1 |= t; 6491 } else { 6492 ta1 = 0; 6493 break; 6494 } 6495 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6496 ta2 |= t; 6497 } else { 6498 ta1 = 0; 6499 break; 6500 } 6501 } 6502 if (ta1 == 0) { 6503 /* This is sheer paranoia, but we handle it anyway */ 6504 if (acpi_tmp7) { 6505 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n"); 6506 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6507 } else { 6508 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n"); 6509 thermal_read_mode = TPACPI_THERMAL_NONE; 6510 } 6511 } else { 6512 thermal_read_mode = 6513 (ta2 != 0) ? 6514 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6515 } 6516 } else if (acpi_tmp7) { 6517 if (tpacpi_is_ibm() && 6518 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6519 /* 600e/x, 770e, 770x */ 6520 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6521 } else { 6522 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6523 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6524 } 6525 } else { 6526 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6527 thermal_read_mode = TPACPI_THERMAL_NONE; 6528 } 6529 6530 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6531 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6532 thermal_read_mode); 6533 6534 switch (thermal_read_mode) { 6535 case TPACPI_THERMAL_TPEC_16: 6536 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6537 &thermal_temp_input16_group); 6538 if (res) 6539 return res; 6540 break; 6541 case TPACPI_THERMAL_TPEC_8: 6542 case TPACPI_THERMAL_ACPI_TMP07: 6543 case TPACPI_THERMAL_ACPI_UPDT: 6544 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6545 &thermal_temp_input8_group); 6546 if (res) 6547 return res; 6548 break; 6549 case TPACPI_THERMAL_NONE: 6550 default: 6551 return 1; 6552 } 6553 6554 return 0; 6555 } 6556 6557 static void thermal_exit(void) 6558 { 6559 switch (thermal_read_mode) { 6560 case TPACPI_THERMAL_TPEC_16: 6561 sysfs_remove_group(&tpacpi_hwmon->kobj, 6562 &thermal_temp_input16_group); 6563 break; 6564 case TPACPI_THERMAL_TPEC_8: 6565 case TPACPI_THERMAL_ACPI_TMP07: 6566 case TPACPI_THERMAL_ACPI_UPDT: 6567 sysfs_remove_group(&tpacpi_hwmon->kobj, 6568 &thermal_temp_input8_group); 6569 break; 6570 case TPACPI_THERMAL_NONE: 6571 default: 6572 break; 6573 } 6574 } 6575 6576 static int thermal_read(struct seq_file *m) 6577 { 6578 int n, i; 6579 struct ibm_thermal_sensors_struct t; 6580 6581 n = thermal_get_sensors(&t); 6582 if (unlikely(n < 0)) 6583 return n; 6584 6585 seq_printf(m, "temperatures:\t"); 6586 6587 if (n > 0) { 6588 for (i = 0; i < (n - 1); i++) 6589 seq_printf(m, "%d ", t.temp[i] / 1000); 6590 seq_printf(m, "%d\n", t.temp[i] / 1000); 6591 } else 6592 seq_printf(m, "not supported\n"); 6593 6594 return 0; 6595 } 6596 6597 static struct ibm_struct thermal_driver_data = { 6598 .name = "thermal", 6599 .read = thermal_read, 6600 .exit = thermal_exit, 6601 }; 6602 6603 /************************************************************************* 6604 * Backlight/brightness subdriver 6605 */ 6606 6607 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6608 6609 /* 6610 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6611 * CMOS NVRAM byte 0x5E, bits 0-3. 6612 * 6613 * EC HBRV (0x31) has the following layout 6614 * Bit 7: unknown function 6615 * Bit 6: unknown function 6616 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6617 * Bit 4: must be set to zero to avoid problems 6618 * Bit 3-0: backlight brightness level 6619 * 6620 * brightness_get_raw returns status data in the HBRV layout 6621 * 6622 * WARNING: The X61 has been verified to use HBRV for something else, so 6623 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6624 * testing on the very early *60 Lenovo models... 6625 */ 6626 6627 enum { 6628 TP_EC_BACKLIGHT = 0x31, 6629 6630 /* TP_EC_BACKLIGHT bitmasks */ 6631 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6632 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6633 TP_EC_BACKLIGHT_MAPSW = 0x20, 6634 }; 6635 6636 enum tpacpi_brightness_access_mode { 6637 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6638 TPACPI_BRGHT_MODE_EC, /* EC control */ 6639 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6640 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6641 TPACPI_BRGHT_MODE_MAX 6642 }; 6643 6644 static struct backlight_device *ibm_backlight_device; 6645 6646 static enum tpacpi_brightness_access_mode brightness_mode = 6647 TPACPI_BRGHT_MODE_MAX; 6648 6649 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6650 6651 static struct mutex brightness_mutex; 6652 6653 /* NVRAM brightness access, 6654 * call with brightness_mutex held! */ 6655 static unsigned int tpacpi_brightness_nvram_get(void) 6656 { 6657 u8 lnvram; 6658 6659 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6660 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6661 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6662 lnvram &= bright_maxlvl; 6663 6664 return lnvram; 6665 } 6666 6667 static void tpacpi_brightness_checkpoint_nvram(void) 6668 { 6669 u8 lec = 0; 6670 u8 b_nvram; 6671 6672 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6673 return; 6674 6675 vdbg_printk(TPACPI_DBG_BRGHT, 6676 "trying to checkpoint backlight level to NVRAM...\n"); 6677 6678 if (mutex_lock_killable(&brightness_mutex) < 0) 6679 return; 6680 6681 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6682 goto unlock; 6683 lec &= TP_EC_BACKLIGHT_LVLMSK; 6684 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6685 6686 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6687 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6688 /* NVRAM needs update */ 6689 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6690 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6691 b_nvram |= lec; 6692 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6693 dbg_printk(TPACPI_DBG_BRGHT, 6694 "updated NVRAM backlight level to %u (0x%02x)\n", 6695 (unsigned int) lec, (unsigned int) b_nvram); 6696 } else 6697 vdbg_printk(TPACPI_DBG_BRGHT, 6698 "NVRAM backlight level already is %u (0x%02x)\n", 6699 (unsigned int) lec, (unsigned int) b_nvram); 6700 6701 unlock: 6702 mutex_unlock(&brightness_mutex); 6703 } 6704 6705 6706 /* call with brightness_mutex held! */ 6707 static int tpacpi_brightness_get_raw(int *status) 6708 { 6709 u8 lec = 0; 6710 6711 switch (brightness_mode) { 6712 case TPACPI_BRGHT_MODE_UCMS_STEP: 6713 *status = tpacpi_brightness_nvram_get(); 6714 return 0; 6715 case TPACPI_BRGHT_MODE_EC: 6716 case TPACPI_BRGHT_MODE_ECNVRAM: 6717 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6718 return -EIO; 6719 *status = lec; 6720 return 0; 6721 default: 6722 return -ENXIO; 6723 } 6724 } 6725 6726 /* call with brightness_mutex held! */ 6727 /* do NOT call with illegal backlight level value */ 6728 static int tpacpi_brightness_set_ec(unsigned int value) 6729 { 6730 u8 lec = 0; 6731 6732 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6733 return -EIO; 6734 6735 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6736 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6737 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6738 return -EIO; 6739 6740 return 0; 6741 } 6742 6743 /* call with brightness_mutex held! */ 6744 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6745 { 6746 int cmos_cmd, inc; 6747 unsigned int current_value, i; 6748 6749 current_value = tpacpi_brightness_nvram_get(); 6750 6751 if (value == current_value) 6752 return 0; 6753 6754 cmos_cmd = (value > current_value) ? 6755 TP_CMOS_BRIGHTNESS_UP : 6756 TP_CMOS_BRIGHTNESS_DOWN; 6757 inc = (value > current_value) ? 1 : -1; 6758 6759 for (i = current_value; i != value; i += inc) 6760 if (issue_thinkpad_cmos_command(cmos_cmd)) 6761 return -EIO; 6762 6763 return 0; 6764 } 6765 6766 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6767 static int brightness_set(unsigned int value) 6768 { 6769 int res; 6770 6771 if (value > bright_maxlvl) 6772 return -EINVAL; 6773 6774 vdbg_printk(TPACPI_DBG_BRGHT, 6775 "set backlight level to %d\n", value); 6776 6777 res = mutex_lock_killable(&brightness_mutex); 6778 if (res < 0) 6779 return res; 6780 6781 switch (brightness_mode) { 6782 case TPACPI_BRGHT_MODE_EC: 6783 case TPACPI_BRGHT_MODE_ECNVRAM: 6784 res = tpacpi_brightness_set_ec(value); 6785 break; 6786 case TPACPI_BRGHT_MODE_UCMS_STEP: 6787 res = tpacpi_brightness_set_ucmsstep(value); 6788 break; 6789 default: 6790 res = -ENXIO; 6791 } 6792 6793 mutex_unlock(&brightness_mutex); 6794 return res; 6795 } 6796 6797 /* sysfs backlight class ----------------------------------------------- */ 6798 6799 static int brightness_update_status(struct backlight_device *bd) 6800 { 6801 unsigned int level = 6802 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6803 bd->props.power == FB_BLANK_UNBLANK) ? 6804 bd->props.brightness : 0; 6805 6806 dbg_printk(TPACPI_DBG_BRGHT, 6807 "backlight: attempt to set level to %d\n", 6808 level); 6809 6810 /* it is the backlight class's job (caller) to handle 6811 * EINTR and other errors properly */ 6812 return brightness_set(level); 6813 } 6814 6815 static int brightness_get(struct backlight_device *bd) 6816 { 6817 int status, res; 6818 6819 res = mutex_lock_killable(&brightness_mutex); 6820 if (res < 0) 6821 return 0; 6822 6823 res = tpacpi_brightness_get_raw(&status); 6824 6825 mutex_unlock(&brightness_mutex); 6826 6827 if (res < 0) 6828 return 0; 6829 6830 return status & TP_EC_BACKLIGHT_LVLMSK; 6831 } 6832 6833 static void tpacpi_brightness_notify_change(void) 6834 { 6835 backlight_force_update(ibm_backlight_device, 6836 BACKLIGHT_UPDATE_HOTKEY); 6837 } 6838 6839 static const struct backlight_ops ibm_backlight_data = { 6840 .get_brightness = brightness_get, 6841 .update_status = brightness_update_status, 6842 }; 6843 6844 /* --------------------------------------------------------------------- */ 6845 6846 /* 6847 * Call _BCL method of video device. On some ThinkPads this will 6848 * switch the firmware to the ACPI brightness control mode. 6849 */ 6850 6851 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6852 { 6853 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6854 union acpi_object *obj; 6855 struct acpi_device *device, *child; 6856 int rc; 6857 6858 if (acpi_bus_get_device(handle, &device)) 6859 return 0; 6860 6861 rc = 0; 6862 list_for_each_entry(child, &device->children, node) { 6863 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6864 NULL, &buffer); 6865 if (ACPI_FAILURE(status)) 6866 continue; 6867 6868 obj = (union acpi_object *)buffer.pointer; 6869 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6870 pr_err("Unknown _BCL data, please report this to %s\n", 6871 TPACPI_MAIL); 6872 rc = 0; 6873 } else { 6874 rc = obj->package.count; 6875 } 6876 break; 6877 } 6878 6879 kfree(buffer.pointer); 6880 return rc; 6881 } 6882 6883 6884 /* 6885 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6886 */ 6887 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6888 { 6889 acpi_handle video_device; 6890 int bcl_levels = 0; 6891 6892 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6893 if (video_device) 6894 bcl_levels = tpacpi_query_bcl_levels(video_device); 6895 6896 tp_features.bright_acpimode = (bcl_levels > 0); 6897 6898 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6899 } 6900 6901 /* 6902 * These are only useful for models that have only one possibility 6903 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6904 * these quirks. 6905 */ 6906 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6907 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6908 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6909 6910 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6911 /* Models with ATI GPUs known to require ECNVRAM mode */ 6912 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6913 6914 /* Models with ATI GPUs that can use ECNVRAM */ 6915 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6916 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6917 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6918 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6919 6920 /* Models with Intel Extreme Graphics 2 */ 6921 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6922 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6923 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6924 6925 /* Models with Intel GMA900 */ 6926 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6927 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6928 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6929 }; 6930 6931 /* 6932 * Returns < 0 for error, otherwise sets tp_features.bright_* 6933 * and bright_maxlvl. 6934 */ 6935 static void __init tpacpi_detect_brightness_capabilities(void) 6936 { 6937 unsigned int b; 6938 6939 vdbg_printk(TPACPI_DBG_INIT, 6940 "detecting firmware brightness interface capabilities\n"); 6941 6942 /* we could run a quirks check here (same table used by 6943 * brightness_init) if needed */ 6944 6945 /* 6946 * We always attempt to detect acpi support, so as to switch 6947 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6948 * going to publish a backlight interface 6949 */ 6950 b = tpacpi_check_std_acpi_brightness_support(); 6951 switch (b) { 6952 case 16: 6953 bright_maxlvl = 15; 6954 break; 6955 case 8: 6956 case 0: 6957 bright_maxlvl = 7; 6958 break; 6959 default: 6960 tp_features.bright_unkfw = 1; 6961 bright_maxlvl = b - 1; 6962 } 6963 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6964 } 6965 6966 static int __init brightness_init(struct ibm_init_struct *iibm) 6967 { 6968 struct backlight_properties props; 6969 int b; 6970 unsigned long quirks; 6971 6972 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6973 6974 mutex_init(&brightness_mutex); 6975 6976 quirks = tpacpi_check_quirks(brightness_quirk_table, 6977 ARRAY_SIZE(brightness_quirk_table)); 6978 6979 /* tpacpi_detect_brightness_capabilities() must have run already */ 6980 6981 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6982 if (tp_features.bright_unkfw) 6983 return 1; 6984 6985 if (!brightness_enable) { 6986 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6987 "brightness support disabled by module parameter\n"); 6988 return 1; 6989 } 6990 6991 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6992 if (brightness_enable > 1) { 6993 pr_info("Standard ACPI backlight interface available, not loading native one\n"); 6994 return 1; 6995 } else if (brightness_enable == 1) { 6996 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n"); 6997 return 1; 6998 } 6999 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 7000 pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n"); 7001 } 7002 7003 /* 7004 * Check for module parameter bogosity, note that we 7005 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 7006 * able to detect "unspecified" 7007 */ 7008 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 7009 return -EINVAL; 7010 7011 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 7012 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 7013 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 7014 if (quirks & TPACPI_BRGHT_Q_EC) 7015 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 7016 else 7017 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 7018 7019 dbg_printk(TPACPI_DBG_BRGHT, 7020 "driver auto-selected brightness_mode=%d\n", 7021 brightness_mode); 7022 } 7023 7024 /* Safety */ 7025 if (!tpacpi_is_ibm() && 7026 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 7027 brightness_mode == TPACPI_BRGHT_MODE_EC)) 7028 return -EINVAL; 7029 7030 if (tpacpi_brightness_get_raw(&b) < 0) 7031 return 1; 7032 7033 memset(&props, 0, sizeof(struct backlight_properties)); 7034 props.type = BACKLIGHT_PLATFORM; 7035 props.max_brightness = bright_maxlvl; 7036 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 7037 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 7038 NULL, NULL, 7039 &ibm_backlight_data, 7040 &props); 7041 if (IS_ERR(ibm_backlight_device)) { 7042 int rc = PTR_ERR(ibm_backlight_device); 7043 ibm_backlight_device = NULL; 7044 pr_err("Could not register backlight device\n"); 7045 return rc; 7046 } 7047 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7048 "brightness is supported\n"); 7049 7050 if (quirks & TPACPI_BRGHT_Q_ASK) { 7051 pr_notice("brightness: will use unverified default: brightness_mode=%d\n", 7052 brightness_mode); 7053 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n", 7054 TPACPI_MAIL); 7055 } 7056 7057 /* Added by mistake in early 2007. Probably useless, but it could 7058 * be working around some unknown firmware problem where the value 7059 * read at startup doesn't match the real hardware state... so leave 7060 * it in place just in case */ 7061 backlight_update_status(ibm_backlight_device); 7062 7063 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7064 "brightness: registering brightness hotkeys as change notification\n"); 7065 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7066 | TP_ACPI_HKEY_BRGHTUP_MASK 7067 | TP_ACPI_HKEY_BRGHTDWN_MASK); 7068 return 0; 7069 } 7070 7071 static void brightness_suspend(void) 7072 { 7073 tpacpi_brightness_checkpoint_nvram(); 7074 } 7075 7076 static void brightness_shutdown(void) 7077 { 7078 tpacpi_brightness_checkpoint_nvram(); 7079 } 7080 7081 static void brightness_exit(void) 7082 { 7083 if (ibm_backlight_device) { 7084 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 7085 "calling backlight_device_unregister()\n"); 7086 backlight_device_unregister(ibm_backlight_device); 7087 } 7088 7089 tpacpi_brightness_checkpoint_nvram(); 7090 } 7091 7092 static int brightness_read(struct seq_file *m) 7093 { 7094 int level; 7095 7096 level = brightness_get(NULL); 7097 if (level < 0) { 7098 seq_printf(m, "level:\t\tunreadable\n"); 7099 } else { 7100 seq_printf(m, "level:\t\t%d\n", level); 7101 seq_printf(m, "commands:\tup, down\n"); 7102 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7103 bright_maxlvl); 7104 } 7105 7106 return 0; 7107 } 7108 7109 static int brightness_write(char *buf) 7110 { 7111 int level; 7112 int rc; 7113 char *cmd; 7114 7115 level = brightness_get(NULL); 7116 if (level < 0) 7117 return level; 7118 7119 while ((cmd = next_cmd(&buf))) { 7120 if (strlencmp(cmd, "up") == 0) { 7121 if (level < bright_maxlvl) 7122 level++; 7123 } else if (strlencmp(cmd, "down") == 0) { 7124 if (level > 0) 7125 level--; 7126 } else if (sscanf(cmd, "level %d", &level) == 1 && 7127 level >= 0 && level <= bright_maxlvl) { 7128 /* new level set */ 7129 } else 7130 return -EINVAL; 7131 } 7132 7133 tpacpi_disclose_usertask("procfs brightness", 7134 "set level to %d\n", level); 7135 7136 /* 7137 * Now we know what the final level should be, so we try to set it. 7138 * Doing it this way makes the syscall restartable in case of EINTR 7139 */ 7140 rc = brightness_set(level); 7141 if (!rc && ibm_backlight_device) 7142 backlight_force_update(ibm_backlight_device, 7143 BACKLIGHT_UPDATE_SYSFS); 7144 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7145 } 7146 7147 static struct ibm_struct brightness_driver_data = { 7148 .name = "brightness", 7149 .read = brightness_read, 7150 .write = brightness_write, 7151 .exit = brightness_exit, 7152 .suspend = brightness_suspend, 7153 .shutdown = brightness_shutdown, 7154 }; 7155 7156 /************************************************************************* 7157 * Volume subdriver 7158 */ 7159 7160 /* 7161 * IBM ThinkPads have a simple volume controller with MUTE gating. 7162 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 7163 * 7164 * Since the *61 series (and probably also the later *60 series), Lenovo 7165 * ThinkPads only implement the MUTE gate. 7166 * 7167 * EC register 0x30 7168 * Bit 6: MUTE (1 mutes sound) 7169 * Bit 3-0: Volume 7170 * Other bits should be zero as far as we know. 7171 * 7172 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 7173 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 7174 * such as bit 7 which is used to detect repeated presses of MUTE, 7175 * and we leave them unchanged. 7176 * 7177 * On newer Lenovo ThinkPads, the EC can automatically change the volume 7178 * in response to user input. Unfortunately, this rarely works well. 7179 * The laptop changes the state of its internal MUTE gate and, on some 7180 * models, sends KEY_MUTE, causing any user code that responds to the 7181 * mute button to get confused. The hardware MUTE gate is also 7182 * unnecessary, since user code can handle the mute button without 7183 * kernel or EC help. 7184 * 7185 * To avoid confusing userspace, we simply disable all EC-based mute 7186 * and volume controls when possible. 7187 */ 7188 7189 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 7190 7191 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 7192 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 7193 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7194 7195 #if SNDRV_CARDS <= 32 7196 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7197 #else 7198 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7199 #endif 7200 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7201 static char *alsa_id = "ThinkPadEC"; 7202 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7203 7204 struct tpacpi_alsa_data { 7205 struct snd_card *card; 7206 struct snd_ctl_elem_id *ctl_mute_id; 7207 struct snd_ctl_elem_id *ctl_vol_id; 7208 }; 7209 7210 static struct snd_card *alsa_card; 7211 7212 enum { 7213 TP_EC_AUDIO = 0x30, 7214 7215 /* TP_EC_AUDIO bits */ 7216 TP_EC_AUDIO_MUTESW = 6, 7217 7218 /* TP_EC_AUDIO bitmasks */ 7219 TP_EC_AUDIO_LVL_MSK = 0x0F, 7220 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7221 7222 /* Maximum volume */ 7223 TP_EC_VOLUME_MAX = 14, 7224 }; 7225 7226 enum tpacpi_volume_access_mode { 7227 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7228 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7229 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7230 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7231 TPACPI_VOL_MODE_MAX 7232 }; 7233 7234 enum tpacpi_volume_capabilities { 7235 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7236 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7237 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7238 TPACPI_VOL_CAP_MAX 7239 }; 7240 7241 enum tpacpi_mute_btn_mode { 7242 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7243 /* We don't know what mode 1 is. */ 7244 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7245 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7246 }; 7247 7248 static enum tpacpi_volume_access_mode volume_mode = 7249 TPACPI_VOL_MODE_MAX; 7250 7251 static enum tpacpi_volume_capabilities volume_capabilities; 7252 static bool volume_control_allowed; 7253 static bool software_mute_requested = true; 7254 static bool software_mute_active; 7255 static int software_mute_orig_mode; 7256 7257 /* 7258 * Used to syncronize writers to TP_EC_AUDIO and 7259 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7260 */ 7261 static struct mutex volume_mutex; 7262 7263 static void tpacpi_volume_checkpoint_nvram(void) 7264 { 7265 u8 lec = 0; 7266 u8 b_nvram; 7267 u8 ec_mask; 7268 7269 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7270 return; 7271 if (!volume_control_allowed) 7272 return; 7273 if (software_mute_active) 7274 return; 7275 7276 vdbg_printk(TPACPI_DBG_MIXER, 7277 "trying to checkpoint mixer state to NVRAM...\n"); 7278 7279 if (tp_features.mixer_no_level_control) 7280 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7281 else 7282 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7283 7284 if (mutex_lock_killable(&volume_mutex) < 0) 7285 return; 7286 7287 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7288 goto unlock; 7289 lec &= ec_mask; 7290 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7291 7292 if (lec != (b_nvram & ec_mask)) { 7293 /* NVRAM needs update */ 7294 b_nvram &= ~ec_mask; 7295 b_nvram |= lec; 7296 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7297 dbg_printk(TPACPI_DBG_MIXER, 7298 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7299 (unsigned int) lec, (unsigned int) b_nvram); 7300 } else { 7301 vdbg_printk(TPACPI_DBG_MIXER, 7302 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7303 (unsigned int) lec, (unsigned int) b_nvram); 7304 } 7305 7306 unlock: 7307 mutex_unlock(&volume_mutex); 7308 } 7309 7310 static int volume_get_status_ec(u8 *status) 7311 { 7312 u8 s; 7313 7314 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7315 return -EIO; 7316 7317 *status = s; 7318 7319 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7320 7321 return 0; 7322 } 7323 7324 static int volume_get_status(u8 *status) 7325 { 7326 return volume_get_status_ec(status); 7327 } 7328 7329 static int volume_set_status_ec(const u8 status) 7330 { 7331 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7332 return -EIO; 7333 7334 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7335 7336 /* 7337 * On X200s, and possibly on others, it can take a while for 7338 * reads to become correct. 7339 */ 7340 msleep(1); 7341 7342 return 0; 7343 } 7344 7345 static int volume_set_status(const u8 status) 7346 { 7347 return volume_set_status_ec(status); 7348 } 7349 7350 /* returns < 0 on error, 0 on no change, 1 on change */ 7351 static int __volume_set_mute_ec(const bool mute) 7352 { 7353 int rc; 7354 u8 s, n; 7355 7356 if (mutex_lock_killable(&volume_mutex) < 0) 7357 return -EINTR; 7358 7359 rc = volume_get_status_ec(&s); 7360 if (rc) 7361 goto unlock; 7362 7363 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7364 s & ~TP_EC_AUDIO_MUTESW_MSK; 7365 7366 if (n != s) { 7367 rc = volume_set_status_ec(n); 7368 if (!rc) 7369 rc = 1; 7370 } 7371 7372 unlock: 7373 mutex_unlock(&volume_mutex); 7374 return rc; 7375 } 7376 7377 static int volume_alsa_set_mute(const bool mute) 7378 { 7379 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7380 (mute) ? "" : "un"); 7381 return __volume_set_mute_ec(mute); 7382 } 7383 7384 static int volume_set_mute(const bool mute) 7385 { 7386 int rc; 7387 7388 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7389 (mute) ? "" : "un"); 7390 7391 rc = __volume_set_mute_ec(mute); 7392 return (rc < 0) ? rc : 0; 7393 } 7394 7395 /* returns < 0 on error, 0 on no change, 1 on change */ 7396 static int __volume_set_volume_ec(const u8 vol) 7397 { 7398 int rc; 7399 u8 s, n; 7400 7401 if (vol > TP_EC_VOLUME_MAX) 7402 return -EINVAL; 7403 7404 if (mutex_lock_killable(&volume_mutex) < 0) 7405 return -EINTR; 7406 7407 rc = volume_get_status_ec(&s); 7408 if (rc) 7409 goto unlock; 7410 7411 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7412 7413 if (n != s) { 7414 rc = volume_set_status_ec(n); 7415 if (!rc) 7416 rc = 1; 7417 } 7418 7419 unlock: 7420 mutex_unlock(&volume_mutex); 7421 return rc; 7422 } 7423 7424 static int volume_set_software_mute(bool startup) 7425 { 7426 int result; 7427 7428 if (!tpacpi_is_lenovo()) 7429 return -ENODEV; 7430 7431 if (startup) { 7432 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7433 "HAUM", "qd")) 7434 return -EIO; 7435 7436 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7437 "Initial HAUM setting was %d\n", 7438 software_mute_orig_mode); 7439 } 7440 7441 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7442 (int)TP_EC_MUTE_BTN_NONE)) 7443 return -EIO; 7444 7445 if (result != TP_EC_MUTE_BTN_NONE) 7446 pr_warn("Unexpected SAUM result %d\n", 7447 result); 7448 7449 /* 7450 * In software mute mode, the standard codec controls take 7451 * precendence, so we unmute the ThinkPad HW switch at 7452 * startup. Just on case there are SAUM-capable ThinkPads 7453 * with level controls, set max HW volume as well. 7454 */ 7455 if (tp_features.mixer_no_level_control) 7456 result = volume_set_mute(false); 7457 else 7458 result = volume_set_status(TP_EC_VOLUME_MAX); 7459 7460 if (result != 0) 7461 pr_warn("Failed to unmute the HW mute switch\n"); 7462 7463 return 0; 7464 } 7465 7466 static void volume_exit_software_mute(void) 7467 { 7468 int r; 7469 7470 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7471 || r != software_mute_orig_mode) 7472 pr_warn("Failed to restore mute mode\n"); 7473 } 7474 7475 static int volume_alsa_set_volume(const u8 vol) 7476 { 7477 dbg_printk(TPACPI_DBG_MIXER, 7478 "ALSA: trying to set volume level to %hu\n", vol); 7479 return __volume_set_volume_ec(vol); 7480 } 7481 7482 static void volume_alsa_notify_change(void) 7483 { 7484 struct tpacpi_alsa_data *d; 7485 7486 if (alsa_card && alsa_card->private_data) { 7487 d = alsa_card->private_data; 7488 if (d->ctl_mute_id) 7489 snd_ctl_notify(alsa_card, 7490 SNDRV_CTL_EVENT_MASK_VALUE, 7491 d->ctl_mute_id); 7492 if (d->ctl_vol_id) 7493 snd_ctl_notify(alsa_card, 7494 SNDRV_CTL_EVENT_MASK_VALUE, 7495 d->ctl_vol_id); 7496 } 7497 } 7498 7499 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7500 struct snd_ctl_elem_info *uinfo) 7501 { 7502 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7503 uinfo->count = 1; 7504 uinfo->value.integer.min = 0; 7505 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7506 return 0; 7507 } 7508 7509 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7510 struct snd_ctl_elem_value *ucontrol) 7511 { 7512 u8 s; 7513 int rc; 7514 7515 rc = volume_get_status(&s); 7516 if (rc < 0) 7517 return rc; 7518 7519 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7520 return 0; 7521 } 7522 7523 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7524 struct snd_ctl_elem_value *ucontrol) 7525 { 7526 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7527 ucontrol->value.integer.value[0]); 7528 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7529 } 7530 7531 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7532 7533 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7534 struct snd_ctl_elem_value *ucontrol) 7535 { 7536 u8 s; 7537 int rc; 7538 7539 rc = volume_get_status(&s); 7540 if (rc < 0) 7541 return rc; 7542 7543 ucontrol->value.integer.value[0] = 7544 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7545 return 0; 7546 } 7547 7548 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7549 struct snd_ctl_elem_value *ucontrol) 7550 { 7551 tpacpi_disclose_usertask("ALSA", "%smute\n", 7552 ucontrol->value.integer.value[0] ? 7553 "un" : ""); 7554 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7555 } 7556 7557 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7558 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7559 .name = "Console Playback Volume", 7560 .index = 0, 7561 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7562 .info = volume_alsa_vol_info, 7563 .get = volume_alsa_vol_get, 7564 }; 7565 7566 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7567 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7568 .name = "Console Playback Switch", 7569 .index = 0, 7570 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7571 .info = volume_alsa_mute_info, 7572 .get = volume_alsa_mute_get, 7573 }; 7574 7575 static void volume_suspend(void) 7576 { 7577 tpacpi_volume_checkpoint_nvram(); 7578 } 7579 7580 static void volume_resume(void) 7581 { 7582 if (software_mute_active) { 7583 if (volume_set_software_mute(false) < 0) 7584 pr_warn("Failed to restore software mute\n"); 7585 } else { 7586 volume_alsa_notify_change(); 7587 } 7588 } 7589 7590 static void volume_shutdown(void) 7591 { 7592 tpacpi_volume_checkpoint_nvram(); 7593 } 7594 7595 static void volume_exit(void) 7596 { 7597 if (alsa_card) { 7598 snd_card_free(alsa_card); 7599 alsa_card = NULL; 7600 } 7601 7602 tpacpi_volume_checkpoint_nvram(); 7603 7604 if (software_mute_active) 7605 volume_exit_software_mute(); 7606 } 7607 7608 static int __init volume_create_alsa_mixer(void) 7609 { 7610 struct snd_card *card; 7611 struct tpacpi_alsa_data *data; 7612 struct snd_kcontrol *ctl_vol; 7613 struct snd_kcontrol *ctl_mute; 7614 int rc; 7615 7616 rc = snd_card_new(&tpacpi_pdev->dev, 7617 alsa_index, alsa_id, THIS_MODULE, 7618 sizeof(struct tpacpi_alsa_data), &card); 7619 if (rc < 0 || !card) { 7620 pr_err("Failed to create ALSA card structures: %d\n", rc); 7621 return 1; 7622 } 7623 7624 BUG_ON(!card->private_data); 7625 data = card->private_data; 7626 data->card = card; 7627 7628 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7629 sizeof(card->driver)); 7630 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7631 sizeof(card->shortname)); 7632 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7633 (thinkpad_id.ec_version_str) ? 7634 thinkpad_id.ec_version_str : "(unknown)"); 7635 snprintf(card->longname, sizeof(card->longname), 7636 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7637 (thinkpad_id.ec_version_str) ? 7638 thinkpad_id.ec_version_str : "unknown"); 7639 7640 if (volume_control_allowed) { 7641 volume_alsa_control_vol.put = volume_alsa_vol_put; 7642 volume_alsa_control_vol.access = 7643 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7644 7645 volume_alsa_control_mute.put = volume_alsa_mute_put; 7646 volume_alsa_control_mute.access = 7647 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7648 } 7649 7650 if (!tp_features.mixer_no_level_control) { 7651 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7652 rc = snd_ctl_add(card, ctl_vol); 7653 if (rc < 0) { 7654 pr_err("Failed to create ALSA volume control: %d\n", 7655 rc); 7656 goto err_exit; 7657 } 7658 data->ctl_vol_id = &ctl_vol->id; 7659 } 7660 7661 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7662 rc = snd_ctl_add(card, ctl_mute); 7663 if (rc < 0) { 7664 pr_err("Failed to create ALSA mute control: %d\n", rc); 7665 goto err_exit; 7666 } 7667 data->ctl_mute_id = &ctl_mute->id; 7668 7669 rc = snd_card_register(card); 7670 if (rc < 0) { 7671 pr_err("Failed to register ALSA card: %d\n", rc); 7672 goto err_exit; 7673 } 7674 7675 alsa_card = card; 7676 return 0; 7677 7678 err_exit: 7679 snd_card_free(card); 7680 return 1; 7681 } 7682 7683 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7684 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7685 7686 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7687 /* Whitelist volume level on all IBM by default */ 7688 { .vendor = PCI_VENDOR_ID_IBM, 7689 .bios = TPACPI_MATCH_ANY, 7690 .ec = TPACPI_MATCH_ANY, 7691 .quirks = TPACPI_VOL_Q_LEVEL }, 7692 7693 /* Lenovo models with volume control (needs confirmation) */ 7694 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7695 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7696 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7697 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7698 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7699 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7700 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7701 7702 /* Whitelist mute-only on all Lenovo by default */ 7703 { .vendor = PCI_VENDOR_ID_LENOVO, 7704 .bios = TPACPI_MATCH_ANY, 7705 .ec = TPACPI_MATCH_ANY, 7706 .quirks = TPACPI_VOL_Q_MUTEONLY } 7707 }; 7708 7709 static int __init volume_init(struct ibm_init_struct *iibm) 7710 { 7711 unsigned long quirks; 7712 int rc; 7713 7714 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7715 7716 mutex_init(&volume_mutex); 7717 7718 /* 7719 * Check for module parameter bogosity, note that we 7720 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7721 * able to detect "unspecified" 7722 */ 7723 if (volume_mode > TPACPI_VOL_MODE_MAX) 7724 return -EINVAL; 7725 7726 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7727 pr_err("UCMS step volume mode not implemented, please contact %s\n", 7728 TPACPI_MAIL); 7729 return 1; 7730 } 7731 7732 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7733 return -EINVAL; 7734 7735 /* 7736 * The ALSA mixer is our primary interface. 7737 * When disabled, don't install the subdriver at all 7738 */ 7739 if (!alsa_enable) { 7740 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7741 "ALSA mixer disabled by parameter, not loading volume subdriver...\n"); 7742 return 1; 7743 } 7744 7745 quirks = tpacpi_check_quirks(volume_quirk_table, 7746 ARRAY_SIZE(volume_quirk_table)); 7747 7748 switch (volume_capabilities) { 7749 case TPACPI_VOL_CAP_AUTO: 7750 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7751 tp_features.mixer_no_level_control = 1; 7752 else if (quirks & TPACPI_VOL_Q_LEVEL) 7753 tp_features.mixer_no_level_control = 0; 7754 else 7755 return 1; /* no mixer */ 7756 break; 7757 case TPACPI_VOL_CAP_VOLMUTE: 7758 tp_features.mixer_no_level_control = 0; 7759 break; 7760 case TPACPI_VOL_CAP_MUTEONLY: 7761 tp_features.mixer_no_level_control = 1; 7762 break; 7763 default: 7764 return 1; 7765 } 7766 7767 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7768 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7769 "using user-supplied volume_capabilities=%d\n", 7770 volume_capabilities); 7771 7772 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7773 volume_mode == TPACPI_VOL_MODE_MAX) { 7774 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7775 7776 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7777 "driver auto-selected volume_mode=%d\n", 7778 volume_mode); 7779 } else { 7780 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7781 "using user-supplied volume_mode=%d\n", 7782 volume_mode); 7783 } 7784 7785 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7786 "mute is supported, volume control is %s\n", 7787 str_supported(!tp_features.mixer_no_level_control)); 7788 7789 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7790 software_mute_active = true; 7791 } else { 7792 rc = volume_create_alsa_mixer(); 7793 if (rc) { 7794 pr_err("Could not create the ALSA mixer interface\n"); 7795 return rc; 7796 } 7797 7798 pr_info("Console audio control enabled, mode: %s\n", 7799 (volume_control_allowed) ? 7800 "override (read/write)" : 7801 "monitor (read only)"); 7802 } 7803 7804 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7805 "registering volume hotkeys as change notification\n"); 7806 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7807 | TP_ACPI_HKEY_VOLUP_MASK 7808 | TP_ACPI_HKEY_VOLDWN_MASK 7809 | TP_ACPI_HKEY_MUTE_MASK); 7810 7811 return 0; 7812 } 7813 7814 static int volume_read(struct seq_file *m) 7815 { 7816 u8 status; 7817 7818 if (volume_get_status(&status) < 0) { 7819 seq_printf(m, "level:\t\tunreadable\n"); 7820 } else { 7821 if (tp_features.mixer_no_level_control) 7822 seq_printf(m, "level:\t\tunsupported\n"); 7823 else 7824 seq_printf(m, "level:\t\t%d\n", 7825 status & TP_EC_AUDIO_LVL_MSK); 7826 7827 seq_printf(m, "mute:\t\t%s\n", 7828 onoff(status, TP_EC_AUDIO_MUTESW)); 7829 7830 if (volume_control_allowed) { 7831 seq_printf(m, "commands:\tunmute, mute\n"); 7832 if (!tp_features.mixer_no_level_control) { 7833 seq_printf(m, "commands:\tup, down\n"); 7834 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7835 TP_EC_VOLUME_MAX); 7836 } 7837 } 7838 } 7839 7840 return 0; 7841 } 7842 7843 static int volume_write(char *buf) 7844 { 7845 u8 s; 7846 u8 new_level, new_mute; 7847 int l; 7848 char *cmd; 7849 int rc; 7850 7851 /* 7852 * We do allow volume control at driver startup, so that the 7853 * user can set initial state through the volume=... parameter hack. 7854 */ 7855 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7856 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7857 tp_warned.volume_ctrl_forbidden = 1; 7858 pr_notice("Console audio control in monitor mode, changes are not allowed\n"); 7859 pr_notice("Use the volume_control=1 module parameter to enable volume control\n"); 7860 } 7861 return -EPERM; 7862 } 7863 7864 rc = volume_get_status(&s); 7865 if (rc < 0) 7866 return rc; 7867 7868 new_level = s & TP_EC_AUDIO_LVL_MSK; 7869 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7870 7871 while ((cmd = next_cmd(&buf))) { 7872 if (!tp_features.mixer_no_level_control) { 7873 if (strlencmp(cmd, "up") == 0) { 7874 if (new_mute) 7875 new_mute = 0; 7876 else if (new_level < TP_EC_VOLUME_MAX) 7877 new_level++; 7878 continue; 7879 } else if (strlencmp(cmd, "down") == 0) { 7880 if (new_mute) 7881 new_mute = 0; 7882 else if (new_level > 0) 7883 new_level--; 7884 continue; 7885 } else if (sscanf(cmd, "level %u", &l) == 1 && 7886 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7887 new_level = l; 7888 continue; 7889 } 7890 } 7891 if (strlencmp(cmd, "mute") == 0) 7892 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7893 else if (strlencmp(cmd, "unmute") == 0) 7894 new_mute = 0; 7895 else 7896 return -EINVAL; 7897 } 7898 7899 if (tp_features.mixer_no_level_control) { 7900 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7901 new_mute ? "" : "un"); 7902 rc = volume_set_mute(!!new_mute); 7903 } else { 7904 tpacpi_disclose_usertask("procfs volume", 7905 "%smute and set level to %d\n", 7906 new_mute ? "" : "un", new_level); 7907 rc = volume_set_status(new_mute | new_level); 7908 } 7909 volume_alsa_notify_change(); 7910 7911 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7912 } 7913 7914 static struct ibm_struct volume_driver_data = { 7915 .name = "volume", 7916 .read = volume_read, 7917 .write = volume_write, 7918 .exit = volume_exit, 7919 .suspend = volume_suspend, 7920 .resume = volume_resume, 7921 .shutdown = volume_shutdown, 7922 }; 7923 7924 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7925 7926 #define alsa_card NULL 7927 7928 static inline void volume_alsa_notify_change(void) 7929 { 7930 } 7931 7932 static int __init volume_init(struct ibm_init_struct *iibm) 7933 { 7934 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7935 7936 return 1; 7937 } 7938 7939 static struct ibm_struct volume_driver_data = { 7940 .name = "volume", 7941 }; 7942 7943 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7944 7945 /************************************************************************* 7946 * Fan subdriver 7947 */ 7948 7949 /* 7950 * FAN ACCESS MODES 7951 * 7952 * TPACPI_FAN_RD_ACPI_GFAN: 7953 * ACPI GFAN method: returns fan level 7954 * 7955 * see TPACPI_FAN_WR_ACPI_SFAN 7956 * EC 0x2f (HFSP) not available if GFAN exists 7957 * 7958 * TPACPI_FAN_WR_ACPI_SFAN: 7959 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7960 * 7961 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7962 * it for writing. 7963 * 7964 * TPACPI_FAN_WR_TPEC: 7965 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7966 * Supported on almost all ThinkPads 7967 * 7968 * Fan speed changes of any sort (including those caused by the 7969 * disengaged mode) are usually done slowly by the firmware as the 7970 * maximum amount of fan duty cycle change per second seems to be 7971 * limited. 7972 * 7973 * Reading is not available if GFAN exists. 7974 * Writing is not available if SFAN exists. 7975 * 7976 * Bits 7977 * 7 automatic mode engaged; 7978 * (default operation mode of the ThinkPad) 7979 * fan level is ignored in this mode. 7980 * 6 full speed mode (takes precedence over bit 7); 7981 * not available on all thinkpads. May disable 7982 * the tachometer while the fan controller ramps up 7983 * the speed (which can take up to a few *minutes*). 7984 * Speeds up fan to 100% duty-cycle, which is far above 7985 * the standard RPM levels. It is not impossible that 7986 * it could cause hardware damage. 7987 * 5-3 unused in some models. Extra bits for fan level 7988 * in others, but still useless as all values above 7989 * 7 map to the same speed as level 7 in these models. 7990 * 2-0 fan level (0..7 usually) 7991 * 0x00 = stop 7992 * 0x07 = max (set when temperatures critical) 7993 * Some ThinkPads may have other levels, see 7994 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7995 * 7996 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7997 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7998 * does so, its initial value is meaningless (0x07). 7999 * 8000 * For firmware bugs, refer to: 8001 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 8002 * 8003 * ---- 8004 * 8005 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 8006 * Main fan tachometer reading (in RPM) 8007 * 8008 * This register is present on all ThinkPads with a new-style EC, and 8009 * it is known not to be present on the A21m/e, and T22, as there is 8010 * something else in offset 0x84 according to the ACPI DSDT. Other 8011 * ThinkPads from this same time period (and earlier) probably lack the 8012 * tachometer as well. 8013 * 8014 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 8015 * was never fixed by IBM to report the EC firmware version string 8016 * probably support the tachometer (like the early X models), so 8017 * detecting it is quite hard. We need more data to know for sure. 8018 * 8019 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 8020 * might result. 8021 * 8022 * FIRMWARE BUG: may go stale while the EC is switching to full speed 8023 * mode. 8024 * 8025 * For firmware bugs, refer to: 8026 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 8027 * 8028 * ---- 8029 * 8030 * ThinkPad EC register 0x31 bit 0 (only on select models) 8031 * 8032 * When bit 0 of EC register 0x31 is zero, the tachometer registers 8033 * show the speed of the main fan. When bit 0 of EC register 0x31 8034 * is one, the tachometer registers show the speed of the auxiliary 8035 * fan. 8036 * 8037 * Fan control seems to affect both fans, regardless of the state 8038 * of this bit. 8039 * 8040 * So far, only the firmware for the X60/X61 non-tablet versions 8041 * seem to support this (firmware TP-7M). 8042 * 8043 * TPACPI_FAN_WR_ACPI_FANS: 8044 * ThinkPad X31, X40, X41. Not available in the X60. 8045 * 8046 * FANS ACPI handle: takes three arguments: low speed, medium speed, 8047 * high speed. ACPI DSDT seems to map these three speeds to levels 8048 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 8049 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 8050 * 8051 * The speeds are stored on handles 8052 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 8053 * 8054 * There are three default speed sets, accessible as handles: 8055 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 8056 * 8057 * ACPI DSDT switches which set is in use depending on various 8058 * factors. 8059 * 8060 * TPACPI_FAN_WR_TPEC is also available and should be used to 8061 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 8062 * but the ACPI tables just mention level 7. 8063 */ 8064 8065 enum { /* Fan control constants */ 8066 fan_status_offset = 0x2f, /* EC register 0x2f */ 8067 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 8068 * 0x84 must be read before 0x85 */ 8069 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 8070 bit 0 selects which fan is active */ 8071 8072 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 8073 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 8074 8075 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 8076 }; 8077 8078 enum fan_status_access_mode { 8079 TPACPI_FAN_NONE = 0, /* No fan status or control */ 8080 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 8081 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 8082 }; 8083 8084 enum fan_control_access_mode { 8085 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 8086 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 8087 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 8088 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 8089 }; 8090 8091 enum fan_control_commands { 8092 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 8093 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 8094 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 8095 * and also watchdog cmd */ 8096 }; 8097 8098 static bool fan_control_allowed; 8099 8100 static enum fan_status_access_mode fan_status_access_mode; 8101 static enum fan_control_access_mode fan_control_access_mode; 8102 static enum fan_control_commands fan_control_commands; 8103 8104 static u8 fan_control_initial_status; 8105 static u8 fan_control_desired_level; 8106 static u8 fan_control_resume_level; 8107 static int fan_watchdog_maxinterval; 8108 8109 static struct mutex fan_mutex; 8110 8111 static void fan_watchdog_fire(struct work_struct *ignored); 8112 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 8113 8114 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 8115 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 8116 "\\FSPD", /* 600e/x, 770e, 770x */ 8117 ); /* all others */ 8118 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 8119 "JFNS", /* 770x-JL */ 8120 ); /* all others */ 8121 8122 /* 8123 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 8124 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 8125 * be in auto mode (0x80). 8126 * 8127 * This is corrected by any write to HFSP either by the driver, or 8128 * by the firmware. 8129 * 8130 * We assume 0x07 really means auto mode while this quirk is active, 8131 * as this is far more likely than the ThinkPad being in level 7, 8132 * which is only used by the firmware during thermal emergencies. 8133 * 8134 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 8135 * TP-70 (T43, R52), which are known to be buggy. 8136 */ 8137 8138 static void fan_quirk1_setup(void) 8139 { 8140 if (fan_control_initial_status == 0x07) { 8141 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n"); 8142 tp_features.fan_ctrl_status_undef = 1; 8143 } 8144 } 8145 8146 static void fan_quirk1_handle(u8 *fan_status) 8147 { 8148 if (unlikely(tp_features.fan_ctrl_status_undef)) { 8149 if (*fan_status != fan_control_initial_status) { 8150 /* something changed the HFSP regisnter since 8151 * driver init time, so it is not undefined 8152 * anymore */ 8153 tp_features.fan_ctrl_status_undef = 0; 8154 } else { 8155 /* Return most likely status. In fact, it 8156 * might be the only possible status */ 8157 *fan_status = TP_EC_FAN_AUTO; 8158 } 8159 } 8160 } 8161 8162 /* Select main fan on X60/X61, NOOP on others */ 8163 static bool fan_select_fan1(void) 8164 { 8165 if (tp_features.second_fan) { 8166 u8 val; 8167 8168 if (ec_read(fan_select_offset, &val) < 0) 8169 return false; 8170 val &= 0xFEU; 8171 if (ec_write(fan_select_offset, val) < 0) 8172 return false; 8173 } 8174 return true; 8175 } 8176 8177 /* Select secondary fan on X60/X61 */ 8178 static bool fan_select_fan2(void) 8179 { 8180 u8 val; 8181 8182 if (!tp_features.second_fan) 8183 return false; 8184 8185 if (ec_read(fan_select_offset, &val) < 0) 8186 return false; 8187 val |= 0x01U; 8188 if (ec_write(fan_select_offset, val) < 0) 8189 return false; 8190 8191 return true; 8192 } 8193 8194 /* 8195 * Call with fan_mutex held 8196 */ 8197 static void fan_update_desired_level(u8 status) 8198 { 8199 if ((status & 8200 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8201 if (status > 7) 8202 fan_control_desired_level = 7; 8203 else 8204 fan_control_desired_level = status; 8205 } 8206 } 8207 8208 static int fan_get_status(u8 *status) 8209 { 8210 u8 s; 8211 8212 /* TODO: 8213 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8214 8215 switch (fan_status_access_mode) { 8216 case TPACPI_FAN_RD_ACPI_GFAN: { 8217 /* 570, 600e/x, 770e, 770x */ 8218 int res; 8219 8220 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8221 return -EIO; 8222 8223 if (likely(status)) 8224 *status = res & 0x07; 8225 8226 break; 8227 } 8228 case TPACPI_FAN_RD_TPEC: 8229 /* all except 570, 600e/x, 770e, 770x */ 8230 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8231 return -EIO; 8232 8233 if (likely(status)) { 8234 *status = s; 8235 fan_quirk1_handle(status); 8236 } 8237 8238 break; 8239 8240 default: 8241 return -ENXIO; 8242 } 8243 8244 return 0; 8245 } 8246 8247 static int fan_get_status_safe(u8 *status) 8248 { 8249 int rc; 8250 u8 s; 8251 8252 if (mutex_lock_killable(&fan_mutex)) 8253 return -ERESTARTSYS; 8254 rc = fan_get_status(&s); 8255 if (!rc) 8256 fan_update_desired_level(s); 8257 mutex_unlock(&fan_mutex); 8258 8259 if (rc) 8260 return rc; 8261 if (status) 8262 *status = s; 8263 8264 return 0; 8265 } 8266 8267 static int fan_get_speed(unsigned int *speed) 8268 { 8269 u8 hi, lo; 8270 8271 switch (fan_status_access_mode) { 8272 case TPACPI_FAN_RD_TPEC: 8273 /* all except 570, 600e/x, 770e, 770x */ 8274 if (unlikely(!fan_select_fan1())) 8275 return -EIO; 8276 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8277 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8278 return -EIO; 8279 8280 if (likely(speed)) 8281 *speed = (hi << 8) | lo; 8282 8283 break; 8284 8285 default: 8286 return -ENXIO; 8287 } 8288 8289 return 0; 8290 } 8291 8292 static int fan2_get_speed(unsigned int *speed) 8293 { 8294 u8 hi, lo; 8295 bool rc; 8296 8297 switch (fan_status_access_mode) { 8298 case TPACPI_FAN_RD_TPEC: 8299 /* all except 570, 600e/x, 770e, 770x */ 8300 if (unlikely(!fan_select_fan2())) 8301 return -EIO; 8302 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8303 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8304 fan_select_fan1(); /* play it safe */ 8305 if (rc) 8306 return -EIO; 8307 8308 if (likely(speed)) 8309 *speed = (hi << 8) | lo; 8310 8311 break; 8312 8313 default: 8314 return -ENXIO; 8315 } 8316 8317 return 0; 8318 } 8319 8320 static int fan_set_level(int level) 8321 { 8322 if (!fan_control_allowed) 8323 return -EPERM; 8324 8325 switch (fan_control_access_mode) { 8326 case TPACPI_FAN_WR_ACPI_SFAN: 8327 if (level >= 0 && level <= 7) { 8328 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8329 return -EIO; 8330 } else 8331 return -EINVAL; 8332 break; 8333 8334 case TPACPI_FAN_WR_ACPI_FANS: 8335 case TPACPI_FAN_WR_TPEC: 8336 if (!(level & TP_EC_FAN_AUTO) && 8337 !(level & TP_EC_FAN_FULLSPEED) && 8338 ((level < 0) || (level > 7))) 8339 return -EINVAL; 8340 8341 /* safety net should the EC not support AUTO 8342 * or FULLSPEED mode bits and just ignore them */ 8343 if (level & TP_EC_FAN_FULLSPEED) 8344 level |= 7; /* safety min speed 7 */ 8345 else if (level & TP_EC_FAN_AUTO) 8346 level |= 4; /* safety min speed 4 */ 8347 8348 if (!acpi_ec_write(fan_status_offset, level)) 8349 return -EIO; 8350 else 8351 tp_features.fan_ctrl_status_undef = 0; 8352 break; 8353 8354 default: 8355 return -ENXIO; 8356 } 8357 8358 vdbg_printk(TPACPI_DBG_FAN, 8359 "fan control: set fan control register to 0x%02x\n", level); 8360 return 0; 8361 } 8362 8363 static int fan_set_level_safe(int level) 8364 { 8365 int rc; 8366 8367 if (!fan_control_allowed) 8368 return -EPERM; 8369 8370 if (mutex_lock_killable(&fan_mutex)) 8371 return -ERESTARTSYS; 8372 8373 if (level == TPACPI_FAN_LAST_LEVEL) 8374 level = fan_control_desired_level; 8375 8376 rc = fan_set_level(level); 8377 if (!rc) 8378 fan_update_desired_level(level); 8379 8380 mutex_unlock(&fan_mutex); 8381 return rc; 8382 } 8383 8384 static int fan_set_enable(void) 8385 { 8386 u8 s; 8387 int rc; 8388 8389 if (!fan_control_allowed) 8390 return -EPERM; 8391 8392 if (mutex_lock_killable(&fan_mutex)) 8393 return -ERESTARTSYS; 8394 8395 switch (fan_control_access_mode) { 8396 case TPACPI_FAN_WR_ACPI_FANS: 8397 case TPACPI_FAN_WR_TPEC: 8398 rc = fan_get_status(&s); 8399 if (rc < 0) 8400 break; 8401 8402 /* Don't go out of emergency fan mode */ 8403 if (s != 7) { 8404 s &= 0x07; 8405 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8406 } 8407 8408 if (!acpi_ec_write(fan_status_offset, s)) 8409 rc = -EIO; 8410 else { 8411 tp_features.fan_ctrl_status_undef = 0; 8412 rc = 0; 8413 } 8414 break; 8415 8416 case TPACPI_FAN_WR_ACPI_SFAN: 8417 rc = fan_get_status(&s); 8418 if (rc < 0) 8419 break; 8420 8421 s &= 0x07; 8422 8423 /* Set fan to at least level 4 */ 8424 s |= 4; 8425 8426 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8427 rc = -EIO; 8428 else 8429 rc = 0; 8430 break; 8431 8432 default: 8433 rc = -ENXIO; 8434 } 8435 8436 mutex_unlock(&fan_mutex); 8437 8438 if (!rc) 8439 vdbg_printk(TPACPI_DBG_FAN, 8440 "fan control: set fan control register to 0x%02x\n", 8441 s); 8442 return rc; 8443 } 8444 8445 static int fan_set_disable(void) 8446 { 8447 int rc; 8448 8449 if (!fan_control_allowed) 8450 return -EPERM; 8451 8452 if (mutex_lock_killable(&fan_mutex)) 8453 return -ERESTARTSYS; 8454 8455 rc = 0; 8456 switch (fan_control_access_mode) { 8457 case TPACPI_FAN_WR_ACPI_FANS: 8458 case TPACPI_FAN_WR_TPEC: 8459 if (!acpi_ec_write(fan_status_offset, 0x00)) 8460 rc = -EIO; 8461 else { 8462 fan_control_desired_level = 0; 8463 tp_features.fan_ctrl_status_undef = 0; 8464 } 8465 break; 8466 8467 case TPACPI_FAN_WR_ACPI_SFAN: 8468 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8469 rc = -EIO; 8470 else 8471 fan_control_desired_level = 0; 8472 break; 8473 8474 default: 8475 rc = -ENXIO; 8476 } 8477 8478 if (!rc) 8479 vdbg_printk(TPACPI_DBG_FAN, 8480 "fan control: set fan control register to 0\n"); 8481 8482 mutex_unlock(&fan_mutex); 8483 return rc; 8484 } 8485 8486 static int fan_set_speed(int speed) 8487 { 8488 int rc; 8489 8490 if (!fan_control_allowed) 8491 return -EPERM; 8492 8493 if (mutex_lock_killable(&fan_mutex)) 8494 return -ERESTARTSYS; 8495 8496 rc = 0; 8497 switch (fan_control_access_mode) { 8498 case TPACPI_FAN_WR_ACPI_FANS: 8499 if (speed >= 0 && speed <= 65535) { 8500 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8501 speed, speed, speed)) 8502 rc = -EIO; 8503 } else 8504 rc = -EINVAL; 8505 break; 8506 8507 default: 8508 rc = -ENXIO; 8509 } 8510 8511 mutex_unlock(&fan_mutex); 8512 return rc; 8513 } 8514 8515 static void fan_watchdog_reset(void) 8516 { 8517 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8518 return; 8519 8520 if (fan_watchdog_maxinterval > 0 && 8521 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8522 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8523 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8524 else 8525 cancel_delayed_work(&fan_watchdog_task); 8526 } 8527 8528 static void fan_watchdog_fire(struct work_struct *ignored) 8529 { 8530 int rc; 8531 8532 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8533 return; 8534 8535 pr_notice("fan watchdog: enabling fan\n"); 8536 rc = fan_set_enable(); 8537 if (rc < 0) { 8538 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n", 8539 rc); 8540 /* reschedule for later */ 8541 fan_watchdog_reset(); 8542 } 8543 } 8544 8545 /* 8546 * SYSFS fan layout: hwmon compatible (device) 8547 * 8548 * pwm*_enable: 8549 * 0: "disengaged" mode 8550 * 1: manual mode 8551 * 2: native EC "auto" mode (recommended, hardware default) 8552 * 8553 * pwm*: set speed in manual mode, ignored otherwise. 8554 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8555 * interpolation. 8556 * 8557 * fan*_input: tachometer reading, RPM 8558 * 8559 * 8560 * SYSFS fan layout: extensions 8561 * 8562 * fan_watchdog (driver): 8563 * fan watchdog interval in seconds, 0 disables (default), max 120 8564 */ 8565 8566 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8567 static ssize_t fan_pwm1_enable_show(struct device *dev, 8568 struct device_attribute *attr, 8569 char *buf) 8570 { 8571 int res, mode; 8572 u8 status; 8573 8574 res = fan_get_status_safe(&status); 8575 if (res) 8576 return res; 8577 8578 if (status & TP_EC_FAN_FULLSPEED) { 8579 mode = 0; 8580 } else if (status & TP_EC_FAN_AUTO) { 8581 mode = 2; 8582 } else 8583 mode = 1; 8584 8585 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8586 } 8587 8588 static ssize_t fan_pwm1_enable_store(struct device *dev, 8589 struct device_attribute *attr, 8590 const char *buf, size_t count) 8591 { 8592 unsigned long t; 8593 int res, level; 8594 8595 if (parse_strtoul(buf, 2, &t)) 8596 return -EINVAL; 8597 8598 tpacpi_disclose_usertask("hwmon pwm1_enable", 8599 "set fan mode to %lu\n", t); 8600 8601 switch (t) { 8602 case 0: 8603 level = TP_EC_FAN_FULLSPEED; 8604 break; 8605 case 1: 8606 level = TPACPI_FAN_LAST_LEVEL; 8607 break; 8608 case 2: 8609 level = TP_EC_FAN_AUTO; 8610 break; 8611 case 3: 8612 /* reserved for software-controlled auto mode */ 8613 return -ENOSYS; 8614 default: 8615 return -EINVAL; 8616 } 8617 8618 res = fan_set_level_safe(level); 8619 if (res == -ENXIO) 8620 return -EINVAL; 8621 else if (res < 0) 8622 return res; 8623 8624 fan_watchdog_reset(); 8625 8626 return count; 8627 } 8628 8629 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8630 fan_pwm1_enable_show, fan_pwm1_enable_store); 8631 8632 /* sysfs fan pwm1 ------------------------------------------------------ */ 8633 static ssize_t fan_pwm1_show(struct device *dev, 8634 struct device_attribute *attr, 8635 char *buf) 8636 { 8637 int res; 8638 u8 status; 8639 8640 res = fan_get_status_safe(&status); 8641 if (res) 8642 return res; 8643 8644 if ((status & 8645 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8646 status = fan_control_desired_level; 8647 8648 if (status > 7) 8649 status = 7; 8650 8651 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8652 } 8653 8654 static ssize_t fan_pwm1_store(struct device *dev, 8655 struct device_attribute *attr, 8656 const char *buf, size_t count) 8657 { 8658 unsigned long s; 8659 int rc; 8660 u8 status, newlevel; 8661 8662 if (parse_strtoul(buf, 255, &s)) 8663 return -EINVAL; 8664 8665 tpacpi_disclose_usertask("hwmon pwm1", 8666 "set fan speed to %lu\n", s); 8667 8668 /* scale down from 0-255 to 0-7 */ 8669 newlevel = (s >> 5) & 0x07; 8670 8671 if (mutex_lock_killable(&fan_mutex)) 8672 return -ERESTARTSYS; 8673 8674 rc = fan_get_status(&status); 8675 if (!rc && (status & 8676 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8677 rc = fan_set_level(newlevel); 8678 if (rc == -ENXIO) 8679 rc = -EINVAL; 8680 else if (!rc) { 8681 fan_update_desired_level(newlevel); 8682 fan_watchdog_reset(); 8683 } 8684 } 8685 8686 mutex_unlock(&fan_mutex); 8687 return (rc) ? rc : count; 8688 } 8689 8690 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8691 8692 /* sysfs fan fan1_input ------------------------------------------------ */ 8693 static ssize_t fan_fan1_input_show(struct device *dev, 8694 struct device_attribute *attr, 8695 char *buf) 8696 { 8697 int res; 8698 unsigned int speed; 8699 8700 res = fan_get_speed(&speed); 8701 if (res < 0) 8702 return res; 8703 8704 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8705 } 8706 8707 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8708 8709 /* sysfs fan fan2_input ------------------------------------------------ */ 8710 static ssize_t fan_fan2_input_show(struct device *dev, 8711 struct device_attribute *attr, 8712 char *buf) 8713 { 8714 int res; 8715 unsigned int speed; 8716 8717 res = fan2_get_speed(&speed); 8718 if (res < 0) 8719 return res; 8720 8721 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8722 } 8723 8724 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8725 8726 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8727 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf) 8728 { 8729 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8730 } 8731 8732 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf, 8733 size_t count) 8734 { 8735 unsigned long t; 8736 8737 if (parse_strtoul(buf, 120, &t)) 8738 return -EINVAL; 8739 8740 if (!fan_control_allowed) 8741 return -EPERM; 8742 8743 fan_watchdog_maxinterval = t; 8744 fan_watchdog_reset(); 8745 8746 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8747 8748 return count; 8749 } 8750 static DRIVER_ATTR_RW(fan_watchdog); 8751 8752 /* --------------------------------------------------------------------- */ 8753 static struct attribute *fan_attributes[] = { 8754 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8755 &dev_attr_fan1_input.attr, 8756 NULL, /* for fan2_input */ 8757 NULL 8758 }; 8759 8760 static const struct attribute_group fan_attr_group = { 8761 .attrs = fan_attributes, 8762 }; 8763 8764 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8765 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8766 8767 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8768 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1), 8769 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1), 8770 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1), 8771 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1), 8772 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN), 8773 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN), 8774 }; 8775 8776 static int __init fan_init(struct ibm_init_struct *iibm) 8777 { 8778 int rc; 8779 unsigned long quirks; 8780 8781 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8782 "initializing fan subdriver\n"); 8783 8784 mutex_init(&fan_mutex); 8785 fan_status_access_mode = TPACPI_FAN_NONE; 8786 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8787 fan_control_commands = 0; 8788 fan_watchdog_maxinterval = 0; 8789 tp_features.fan_ctrl_status_undef = 0; 8790 tp_features.second_fan = 0; 8791 fan_control_desired_level = 7; 8792 8793 if (tpacpi_is_ibm()) { 8794 TPACPI_ACPIHANDLE_INIT(fans); 8795 TPACPI_ACPIHANDLE_INIT(gfan); 8796 TPACPI_ACPIHANDLE_INIT(sfan); 8797 } 8798 8799 quirks = tpacpi_check_quirks(fan_quirk_table, 8800 ARRAY_SIZE(fan_quirk_table)); 8801 8802 if (gfan_handle) { 8803 /* 570, 600e/x, 770e, 770x */ 8804 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8805 } else { 8806 /* all other ThinkPads: note that even old-style 8807 * ThinkPad ECs supports the fan control register */ 8808 if (likely(acpi_ec_read(fan_status_offset, 8809 &fan_control_initial_status))) { 8810 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8811 if (quirks & TPACPI_FAN_Q1) 8812 fan_quirk1_setup(); 8813 if (quirks & TPACPI_FAN_2FAN) { 8814 tp_features.second_fan = 1; 8815 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8816 "secondary fan support enabled\n"); 8817 } 8818 } else { 8819 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n"); 8820 return 1; 8821 } 8822 } 8823 8824 if (sfan_handle) { 8825 /* 570, 770x-JL */ 8826 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8827 fan_control_commands |= 8828 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8829 } else { 8830 if (!gfan_handle) { 8831 /* gfan without sfan means no fan control */ 8832 /* all other models implement TP EC 0x2f control */ 8833 8834 if (fans_handle) { 8835 /* X31, X40, X41 */ 8836 fan_control_access_mode = 8837 TPACPI_FAN_WR_ACPI_FANS; 8838 fan_control_commands |= 8839 TPACPI_FAN_CMD_SPEED | 8840 TPACPI_FAN_CMD_LEVEL | 8841 TPACPI_FAN_CMD_ENABLE; 8842 } else { 8843 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8844 fan_control_commands |= 8845 TPACPI_FAN_CMD_LEVEL | 8846 TPACPI_FAN_CMD_ENABLE; 8847 } 8848 } 8849 } 8850 8851 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8852 "fan is %s, modes %d, %d\n", 8853 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8854 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8855 fan_status_access_mode, fan_control_access_mode); 8856 8857 /* fan control master switch */ 8858 if (!fan_control_allowed) { 8859 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8860 fan_control_commands = 0; 8861 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8862 "fan control features disabled by parameter\n"); 8863 } 8864 8865 /* update fan_control_desired_level */ 8866 if (fan_status_access_mode != TPACPI_FAN_NONE) 8867 fan_get_status_safe(NULL); 8868 8869 if (fan_status_access_mode != TPACPI_FAN_NONE || 8870 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8871 if (tp_features.second_fan) { 8872 /* attach second fan tachometer */ 8873 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8874 &dev_attr_fan2_input.attr; 8875 } 8876 rc = sysfs_create_group(&tpacpi_hwmon->kobj, 8877 &fan_attr_group); 8878 if (rc < 0) 8879 return rc; 8880 8881 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8882 &driver_attr_fan_watchdog); 8883 if (rc < 0) { 8884 sysfs_remove_group(&tpacpi_hwmon->kobj, 8885 &fan_attr_group); 8886 return rc; 8887 } 8888 return 0; 8889 } else 8890 return 1; 8891 } 8892 8893 static void fan_exit(void) 8894 { 8895 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8896 "cancelling any pending fan watchdog tasks\n"); 8897 8898 /* FIXME: can we really do this unconditionally? */ 8899 sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group); 8900 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8901 &driver_attr_fan_watchdog); 8902 8903 cancel_delayed_work(&fan_watchdog_task); 8904 flush_workqueue(tpacpi_wq); 8905 } 8906 8907 static void fan_suspend(void) 8908 { 8909 int rc; 8910 8911 if (!fan_control_allowed) 8912 return; 8913 8914 /* Store fan status in cache */ 8915 fan_control_resume_level = 0; 8916 rc = fan_get_status_safe(&fan_control_resume_level); 8917 if (rc < 0) 8918 pr_notice("failed to read fan level for later restore during resume: %d\n", 8919 rc); 8920 8921 /* if it is undefined, don't attempt to restore it. 8922 * KEEP THIS LAST */ 8923 if (tp_features.fan_ctrl_status_undef) 8924 fan_control_resume_level = 0; 8925 } 8926 8927 static void fan_resume(void) 8928 { 8929 u8 current_level = 7; 8930 bool do_set = false; 8931 int rc; 8932 8933 /* DSDT *always* updates status on resume */ 8934 tp_features.fan_ctrl_status_undef = 0; 8935 8936 if (!fan_control_allowed || 8937 !fan_control_resume_level || 8938 (fan_get_status_safe(¤t_level) < 0)) 8939 return; 8940 8941 switch (fan_control_access_mode) { 8942 case TPACPI_FAN_WR_ACPI_SFAN: 8943 /* never decrease fan level */ 8944 do_set = (fan_control_resume_level > current_level); 8945 break; 8946 case TPACPI_FAN_WR_ACPI_FANS: 8947 case TPACPI_FAN_WR_TPEC: 8948 /* never decrease fan level, scale is: 8949 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8950 * 8951 * We expect the firmware to set either 7 or AUTO, but we 8952 * handle FULLSPEED out of paranoia. 8953 * 8954 * So, we can safely only restore FULLSPEED or 7, anything 8955 * else could slow the fan. Restoring AUTO is useless, at 8956 * best that's exactly what the DSDT already set (it is the 8957 * slower it uses). 8958 * 8959 * Always keep in mind that the DSDT *will* have set the 8960 * fans to what the vendor supposes is the best level. We 8961 * muck with it only to speed the fan up. 8962 */ 8963 if (fan_control_resume_level != 7 && 8964 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8965 return; 8966 else 8967 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8968 (current_level != fan_control_resume_level); 8969 break; 8970 default: 8971 return; 8972 } 8973 if (do_set) { 8974 pr_notice("restoring fan level to 0x%02x\n", 8975 fan_control_resume_level); 8976 rc = fan_set_level_safe(fan_control_resume_level); 8977 if (rc < 0) 8978 pr_notice("failed to restore fan level: %d\n", rc); 8979 } 8980 } 8981 8982 static int fan_read(struct seq_file *m) 8983 { 8984 int rc; 8985 u8 status; 8986 unsigned int speed = 0; 8987 8988 switch (fan_status_access_mode) { 8989 case TPACPI_FAN_RD_ACPI_GFAN: 8990 /* 570, 600e/x, 770e, 770x */ 8991 rc = fan_get_status_safe(&status); 8992 if (rc < 0) 8993 return rc; 8994 8995 seq_printf(m, "status:\t\t%s\n" 8996 "level:\t\t%d\n", 8997 (status != 0) ? "enabled" : "disabled", status); 8998 break; 8999 9000 case TPACPI_FAN_RD_TPEC: 9001 /* all except 570, 600e/x, 770e, 770x */ 9002 rc = fan_get_status_safe(&status); 9003 if (rc < 0) 9004 return rc; 9005 9006 seq_printf(m, "status:\t\t%s\n", 9007 (status != 0) ? "enabled" : "disabled"); 9008 9009 rc = fan_get_speed(&speed); 9010 if (rc < 0) 9011 return rc; 9012 9013 seq_printf(m, "speed:\t\t%d\n", speed); 9014 9015 if (status & TP_EC_FAN_FULLSPEED) 9016 /* Disengaged mode takes precedence */ 9017 seq_printf(m, "level:\t\tdisengaged\n"); 9018 else if (status & TP_EC_FAN_AUTO) 9019 seq_printf(m, "level:\t\tauto\n"); 9020 else 9021 seq_printf(m, "level:\t\t%d\n", status); 9022 break; 9023 9024 case TPACPI_FAN_NONE: 9025 default: 9026 seq_printf(m, "status:\t\tnot supported\n"); 9027 } 9028 9029 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 9030 seq_printf(m, "commands:\tlevel <level>"); 9031 9032 switch (fan_control_access_mode) { 9033 case TPACPI_FAN_WR_ACPI_SFAN: 9034 seq_printf(m, " (<level> is 0-7)\n"); 9035 break; 9036 9037 default: 9038 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n"); 9039 break; 9040 } 9041 } 9042 9043 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 9044 seq_printf(m, "commands:\tenable, disable\n" 9045 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n"); 9046 9047 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 9048 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n"); 9049 9050 return 0; 9051 } 9052 9053 static int fan_write_cmd_level(const char *cmd, int *rc) 9054 { 9055 int level; 9056 9057 if (strlencmp(cmd, "level auto") == 0) 9058 level = TP_EC_FAN_AUTO; 9059 else if ((strlencmp(cmd, "level disengaged") == 0) | 9060 (strlencmp(cmd, "level full-speed") == 0)) 9061 level = TP_EC_FAN_FULLSPEED; 9062 else if (sscanf(cmd, "level %d", &level) != 1) 9063 return 0; 9064 9065 *rc = fan_set_level_safe(level); 9066 if (*rc == -ENXIO) 9067 pr_err("level command accepted for unsupported access mode %d\n", 9068 fan_control_access_mode); 9069 else if (!*rc) 9070 tpacpi_disclose_usertask("procfs fan", 9071 "set level to %d\n", level); 9072 9073 return 1; 9074 } 9075 9076 static int fan_write_cmd_enable(const char *cmd, int *rc) 9077 { 9078 if (strlencmp(cmd, "enable") != 0) 9079 return 0; 9080 9081 *rc = fan_set_enable(); 9082 if (*rc == -ENXIO) 9083 pr_err("enable command accepted for unsupported access mode %d\n", 9084 fan_control_access_mode); 9085 else if (!*rc) 9086 tpacpi_disclose_usertask("procfs fan", "enable\n"); 9087 9088 return 1; 9089 } 9090 9091 static int fan_write_cmd_disable(const char *cmd, int *rc) 9092 { 9093 if (strlencmp(cmd, "disable") != 0) 9094 return 0; 9095 9096 *rc = fan_set_disable(); 9097 if (*rc == -ENXIO) 9098 pr_err("disable command accepted for unsupported access mode %d\n", 9099 fan_control_access_mode); 9100 else if (!*rc) 9101 tpacpi_disclose_usertask("procfs fan", "disable\n"); 9102 9103 return 1; 9104 } 9105 9106 static int fan_write_cmd_speed(const char *cmd, int *rc) 9107 { 9108 int speed; 9109 9110 /* TODO: 9111 * Support speed <low> <medium> <high> ? */ 9112 9113 if (sscanf(cmd, "speed %d", &speed) != 1) 9114 return 0; 9115 9116 *rc = fan_set_speed(speed); 9117 if (*rc == -ENXIO) 9118 pr_err("speed command accepted for unsupported access mode %d\n", 9119 fan_control_access_mode); 9120 else if (!*rc) 9121 tpacpi_disclose_usertask("procfs fan", 9122 "set speed to %d\n", speed); 9123 9124 return 1; 9125 } 9126 9127 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 9128 { 9129 int interval; 9130 9131 if (sscanf(cmd, "watchdog %d", &interval) != 1) 9132 return 0; 9133 9134 if (interval < 0 || interval > 120) 9135 *rc = -EINVAL; 9136 else { 9137 fan_watchdog_maxinterval = interval; 9138 tpacpi_disclose_usertask("procfs fan", 9139 "set watchdog timer to %d\n", 9140 interval); 9141 } 9142 9143 return 1; 9144 } 9145 9146 static int fan_write(char *buf) 9147 { 9148 char *cmd; 9149 int rc = 0; 9150 9151 while (!rc && (cmd = next_cmd(&buf))) { 9152 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 9153 fan_write_cmd_level(cmd, &rc)) && 9154 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 9155 (fan_write_cmd_enable(cmd, &rc) || 9156 fan_write_cmd_disable(cmd, &rc) || 9157 fan_write_cmd_watchdog(cmd, &rc))) && 9158 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 9159 fan_write_cmd_speed(cmd, &rc)) 9160 ) 9161 rc = -EINVAL; 9162 else if (!rc) 9163 fan_watchdog_reset(); 9164 } 9165 9166 return rc; 9167 } 9168 9169 static struct ibm_struct fan_driver_data = { 9170 .name = "fan", 9171 .read = fan_read, 9172 .write = fan_write, 9173 .exit = fan_exit, 9174 .suspend = fan_suspend, 9175 .resume = fan_resume, 9176 }; 9177 9178 /************************************************************************* 9179 * Mute LED subdriver 9180 */ 9181 9182 #define TPACPI_LED_MAX 2 9183 9184 struct tp_led_table { 9185 acpi_string name; 9186 int on_value; 9187 int off_value; 9188 int state; 9189 }; 9190 9191 static struct tp_led_table led_tables[TPACPI_LED_MAX] = { 9192 [LED_AUDIO_MUTE] = { 9193 .name = "SSMS", 9194 .on_value = 1, 9195 .off_value = 0, 9196 }, 9197 [LED_AUDIO_MICMUTE] = { 9198 .name = "MMTS", 9199 .on_value = 2, 9200 .off_value = 0, 9201 }, 9202 }; 9203 9204 static int mute_led_on_off(struct tp_led_table *t, bool state) 9205 { 9206 acpi_handle temp; 9207 int output; 9208 9209 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9210 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9211 return -EIO; 9212 } 9213 9214 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9215 state ? t->on_value : t->off_value)) 9216 return -EIO; 9217 9218 t->state = state; 9219 return state; 9220 } 9221 9222 static int tpacpi_led_set(int whichled, bool on) 9223 { 9224 struct tp_led_table *t; 9225 9226 t = &led_tables[whichled]; 9227 if (t->state < 0 || t->state == on) 9228 return t->state; 9229 return mute_led_on_off(t, on); 9230 } 9231 9232 static int tpacpi_led_mute_set(struct led_classdev *led_cdev, 9233 enum led_brightness brightness) 9234 { 9235 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF); 9236 } 9237 9238 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev, 9239 enum led_brightness brightness) 9240 { 9241 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF); 9242 } 9243 9244 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = { 9245 [LED_AUDIO_MUTE] = { 9246 .name = "platform::mute", 9247 .max_brightness = 1, 9248 .brightness_set_blocking = tpacpi_led_mute_set, 9249 .default_trigger = "audio-mute", 9250 }, 9251 [LED_AUDIO_MICMUTE] = { 9252 .name = "platform::micmute", 9253 .max_brightness = 1, 9254 .brightness_set_blocking = tpacpi_led_micmute_set, 9255 .default_trigger = "audio-micmute", 9256 }, 9257 }; 9258 9259 static int mute_led_init(struct ibm_init_struct *iibm) 9260 { 9261 acpi_handle temp; 9262 int i, err; 9263 9264 for (i = 0; i < TPACPI_LED_MAX; i++) { 9265 struct tp_led_table *t = &led_tables[i]; 9266 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9267 t->state = -ENODEV; 9268 continue; 9269 } 9270 9271 mute_led_cdev[i].brightness = ledtrig_audio_get(i); 9272 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]); 9273 if (err < 0) { 9274 while (i--) { 9275 if (led_tables[i].state >= 0) 9276 led_classdev_unregister(&mute_led_cdev[i]); 9277 } 9278 return err; 9279 } 9280 } 9281 return 0; 9282 } 9283 9284 static void mute_led_exit(void) 9285 { 9286 int i; 9287 9288 for (i = 0; i < TPACPI_LED_MAX; i++) { 9289 if (led_tables[i].state >= 0) { 9290 led_classdev_unregister(&mute_led_cdev[i]); 9291 tpacpi_led_set(i, false); 9292 } 9293 } 9294 } 9295 9296 static void mute_led_resume(void) 9297 { 9298 int i; 9299 9300 for (i = 0; i < TPACPI_LED_MAX; i++) { 9301 struct tp_led_table *t = &led_tables[i]; 9302 if (t->state >= 0) 9303 mute_led_on_off(t, t->state); 9304 } 9305 } 9306 9307 static struct ibm_struct mute_led_driver_data = { 9308 .name = "mute_led", 9309 .exit = mute_led_exit, 9310 .resume = mute_led_resume, 9311 }; 9312 9313 /* 9314 * Battery Wear Control Driver 9315 * Contact: Ognjen Galic <smclt30p@gmail.com> 9316 */ 9317 9318 /* Metadata */ 9319 9320 #define GET_START "BCTG" 9321 #define SET_START "BCCS" 9322 #define GET_STOP "BCSG" 9323 #define SET_STOP "BCSS" 9324 9325 #define START_ATTR "charge_start_threshold" 9326 #define STOP_ATTR "charge_stop_threshold" 9327 9328 enum { 9329 BAT_ANY = 0, 9330 BAT_PRIMARY = 1, 9331 BAT_SECONDARY = 2 9332 }; 9333 9334 enum { 9335 /* Error condition bit */ 9336 METHOD_ERR = BIT(31), 9337 }; 9338 9339 enum { 9340 /* This is used in the get/set helpers */ 9341 THRESHOLD_START, 9342 THRESHOLD_STOP, 9343 }; 9344 9345 struct tpacpi_battery_data { 9346 int charge_start; 9347 int start_support; 9348 int charge_stop; 9349 int stop_support; 9350 }; 9351 9352 struct tpacpi_battery_driver_data { 9353 struct tpacpi_battery_data batteries[3]; 9354 int individual_addressing; 9355 }; 9356 9357 static struct tpacpi_battery_driver_data battery_info; 9358 9359 /* ACPI helpers/functions/probes */ 9360 9361 /** 9362 * This evaluates a ACPI method call specific to the battery 9363 * ACPI extension. The specifics are that an error is marked 9364 * in the 32rd bit of the response, so we just check that here. 9365 */ 9366 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param) 9367 { 9368 int response; 9369 9370 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) { 9371 acpi_handle_err(hkey_handle, "%s: evaluate failed", method); 9372 return AE_ERROR; 9373 } 9374 if (response & METHOD_ERR) { 9375 acpi_handle_err(hkey_handle, 9376 "%s evaluated but flagged as error", method); 9377 return AE_ERROR; 9378 } 9379 *ret = response; 9380 return AE_OK; 9381 } 9382 9383 static int tpacpi_battery_get(int what, int battery, int *ret) 9384 { 9385 switch (what) { 9386 case THRESHOLD_START: 9387 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery)) 9388 return -ENODEV; 9389 9390 /* The value is in the low 8 bits of the response */ 9391 *ret = *ret & 0xFF; 9392 return 0; 9393 case THRESHOLD_STOP: 9394 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery)) 9395 return -ENODEV; 9396 /* Value is in lower 8 bits */ 9397 *ret = *ret & 0xFF; 9398 /* 9399 * On the stop value, if we return 0 that 9400 * does not make any sense. 0 means Default, which 9401 * means that charging stops at 100%, so we return 9402 * that. 9403 */ 9404 if (*ret == 0) 9405 *ret = 100; 9406 return 0; 9407 default: 9408 pr_crit("wrong parameter: %d", what); 9409 return -EINVAL; 9410 } 9411 } 9412 9413 static int tpacpi_battery_set(int what, int battery, int value) 9414 { 9415 int param, ret; 9416 /* The first 8 bits are the value of the threshold */ 9417 param = value; 9418 /* The battery ID is in bits 8-9, 2 bits */ 9419 param |= battery << 8; 9420 9421 switch (what) { 9422 case THRESHOLD_START: 9423 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) { 9424 pr_err("failed to set charge threshold on battery %d", 9425 battery); 9426 return -ENODEV; 9427 } 9428 return 0; 9429 case THRESHOLD_STOP: 9430 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) { 9431 pr_err("failed to set stop threshold: %d", battery); 9432 return -ENODEV; 9433 } 9434 return 0; 9435 default: 9436 pr_crit("wrong parameter: %d", what); 9437 return -EINVAL; 9438 } 9439 } 9440 9441 static int tpacpi_battery_probe(int battery) 9442 { 9443 int ret = 0; 9444 9445 memset(&battery_info.batteries[battery], 0, 9446 sizeof(battery_info.batteries[battery])); 9447 9448 /* 9449 * 1) Get the current start threshold 9450 * 2) Check for support 9451 * 3) Get the current stop threshold 9452 * 4) Check for support 9453 */ 9454 if (acpi_has_method(hkey_handle, GET_START)) { 9455 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { 9456 pr_err("Error probing battery %d\n", battery); 9457 return -ENODEV; 9458 } 9459 /* Individual addressing is in bit 9 */ 9460 if (ret & BIT(9)) 9461 battery_info.individual_addressing = true; 9462 /* Support is marked in bit 8 */ 9463 if (ret & BIT(8)) 9464 battery_info.batteries[battery].start_support = 1; 9465 else 9466 return -ENODEV; 9467 if (tpacpi_battery_get(THRESHOLD_START, battery, 9468 &battery_info.batteries[battery].charge_start)) { 9469 pr_err("Error probing battery %d\n", battery); 9470 return -ENODEV; 9471 } 9472 } 9473 if (acpi_has_method(hkey_handle, GET_STOP)) { 9474 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) { 9475 pr_err("Error probing battery stop; %d\n", battery); 9476 return -ENODEV; 9477 } 9478 /* Support is marked in bit 8 */ 9479 if (ret & BIT(8)) 9480 battery_info.batteries[battery].stop_support = 1; 9481 else 9482 return -ENODEV; 9483 if (tpacpi_battery_get(THRESHOLD_STOP, battery, 9484 &battery_info.batteries[battery].charge_stop)) { 9485 pr_err("Error probing battery stop: %d\n", battery); 9486 return -ENODEV; 9487 } 9488 } 9489 pr_info("battery %d registered (start %d, stop %d)", 9490 battery, 9491 battery_info.batteries[battery].charge_start, 9492 battery_info.batteries[battery].charge_stop); 9493 9494 return 0; 9495 } 9496 9497 /* General helper functions */ 9498 9499 static int tpacpi_battery_get_id(const char *battery_name) 9500 { 9501 9502 if (strcmp(battery_name, "BAT0") == 0 || 9503 tp_features.battery_force_primary) 9504 return BAT_PRIMARY; 9505 if (strcmp(battery_name, "BAT1") == 0) 9506 return BAT_SECONDARY; 9507 /* 9508 * If for some reason the battery is not BAT0 nor is it 9509 * BAT1, we will assume it's the default, first battery, 9510 * AKA primary. 9511 */ 9512 pr_warn("unknown battery %s, assuming primary", battery_name); 9513 return BAT_PRIMARY; 9514 } 9515 9516 /* sysfs interface */ 9517 9518 static ssize_t tpacpi_battery_store(int what, 9519 struct device *dev, 9520 const char *buf, size_t count) 9521 { 9522 struct power_supply *supply = to_power_supply(dev); 9523 unsigned long value; 9524 int battery, rval; 9525 /* 9526 * Some systems have support for more than 9527 * one battery. If that is the case, 9528 * tpacpi_battery_probe marked that addressing 9529 * them individually is supported, so we do that 9530 * based on the device struct. 9531 * 9532 * On systems that are not supported, we assume 9533 * the primary as most of the ACPI calls fail 9534 * with "Any Battery" as the parameter. 9535 */ 9536 if (battery_info.individual_addressing) 9537 /* BAT_PRIMARY or BAT_SECONDARY */ 9538 battery = tpacpi_battery_get_id(supply->desc->name); 9539 else 9540 battery = BAT_PRIMARY; 9541 9542 rval = kstrtoul(buf, 10, &value); 9543 if (rval) 9544 return rval; 9545 9546 switch (what) { 9547 case THRESHOLD_START: 9548 if (!battery_info.batteries[battery].start_support) 9549 return -ENODEV; 9550 /* valid values are [0, 99] */ 9551 if (value > 99) 9552 return -EINVAL; 9553 if (value > battery_info.batteries[battery].charge_stop) 9554 return -EINVAL; 9555 if (tpacpi_battery_set(THRESHOLD_START, battery, value)) 9556 return -ENODEV; 9557 battery_info.batteries[battery].charge_start = value; 9558 return count; 9559 9560 case THRESHOLD_STOP: 9561 if (!battery_info.batteries[battery].stop_support) 9562 return -ENODEV; 9563 /* valid values are [1, 100] */ 9564 if (value < 1 || value > 100) 9565 return -EINVAL; 9566 if (value < battery_info.batteries[battery].charge_start) 9567 return -EINVAL; 9568 battery_info.batteries[battery].charge_stop = value; 9569 /* 9570 * When 100 is passed to stop, we need to flip 9571 * it to 0 as that the EC understands that as 9572 * "Default", which will charge to 100% 9573 */ 9574 if (value == 100) 9575 value = 0; 9576 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value)) 9577 return -EINVAL; 9578 return count; 9579 default: 9580 pr_crit("Wrong parameter: %d", what); 9581 return -EINVAL; 9582 } 9583 return count; 9584 } 9585 9586 static ssize_t tpacpi_battery_show(int what, 9587 struct device *dev, 9588 char *buf) 9589 { 9590 struct power_supply *supply = to_power_supply(dev); 9591 int ret, battery; 9592 /* 9593 * Some systems have support for more than 9594 * one battery. If that is the case, 9595 * tpacpi_battery_probe marked that addressing 9596 * them individually is supported, so we; 9597 * based on the device struct. 9598 * 9599 * On systems that are not supported, we assume 9600 * the primary as most of the ACPI calls fail 9601 * with "Any Battery" as the parameter. 9602 */ 9603 if (battery_info.individual_addressing) 9604 /* BAT_PRIMARY or BAT_SECONDARY */ 9605 battery = tpacpi_battery_get_id(supply->desc->name); 9606 else 9607 battery = BAT_PRIMARY; 9608 if (tpacpi_battery_get(what, battery, &ret)) 9609 return -ENODEV; 9610 return sprintf(buf, "%d\n", ret); 9611 } 9612 9613 static ssize_t charge_start_threshold_show(struct device *device, 9614 struct device_attribute *attr, 9615 char *buf) 9616 { 9617 return tpacpi_battery_show(THRESHOLD_START, device, buf); 9618 } 9619 9620 static ssize_t charge_stop_threshold_show(struct device *device, 9621 struct device_attribute *attr, 9622 char *buf) 9623 { 9624 return tpacpi_battery_show(THRESHOLD_STOP, device, buf); 9625 } 9626 9627 static ssize_t charge_start_threshold_store(struct device *dev, 9628 struct device_attribute *attr, 9629 const char *buf, size_t count) 9630 { 9631 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count); 9632 } 9633 9634 static ssize_t charge_stop_threshold_store(struct device *dev, 9635 struct device_attribute *attr, 9636 const char *buf, size_t count) 9637 { 9638 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count); 9639 } 9640 9641 static DEVICE_ATTR_RW(charge_start_threshold); 9642 static DEVICE_ATTR_RW(charge_stop_threshold); 9643 9644 static struct attribute *tpacpi_battery_attrs[] = { 9645 &dev_attr_charge_start_threshold.attr, 9646 &dev_attr_charge_stop_threshold.attr, 9647 NULL, 9648 }; 9649 9650 ATTRIBUTE_GROUPS(tpacpi_battery); 9651 9652 /* ACPI battery hooking */ 9653 9654 static int tpacpi_battery_add(struct power_supply *battery) 9655 { 9656 int batteryid = tpacpi_battery_get_id(battery->desc->name); 9657 9658 if (tpacpi_battery_probe(batteryid)) 9659 return -ENODEV; 9660 if (device_add_groups(&battery->dev, tpacpi_battery_groups)) 9661 return -ENODEV; 9662 return 0; 9663 } 9664 9665 static int tpacpi_battery_remove(struct power_supply *battery) 9666 { 9667 device_remove_groups(&battery->dev, tpacpi_battery_groups); 9668 return 0; 9669 } 9670 9671 static struct acpi_battery_hook battery_hook = { 9672 .add_battery = tpacpi_battery_add, 9673 .remove_battery = tpacpi_battery_remove, 9674 .name = "ThinkPad Battery Extension", 9675 }; 9676 9677 /* Subdriver init/exit */ 9678 9679 static const struct tpacpi_quirk battery_quirk_table[] __initconst = { 9680 /* 9681 * Individual addressing is broken on models that expose the 9682 * primary battery as BAT1. 9683 */ 9684 TPACPI_Q_LNV('J', '7', true), /* B5400 */ 9685 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */ 9686 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */ 9687 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */ 9688 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */ 9689 }; 9690 9691 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm) 9692 { 9693 memset(&battery_info, 0, sizeof(battery_info)); 9694 9695 tp_features.battery_force_primary = tpacpi_check_quirks( 9696 battery_quirk_table, 9697 ARRAY_SIZE(battery_quirk_table)); 9698 9699 battery_hook_register(&battery_hook); 9700 return 0; 9701 } 9702 9703 static void tpacpi_battery_exit(void) 9704 { 9705 battery_hook_unregister(&battery_hook); 9706 } 9707 9708 static struct ibm_struct battery_driver_data = { 9709 .name = "battery", 9710 .exit = tpacpi_battery_exit, 9711 }; 9712 9713 /************************************************************************* 9714 * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature 9715 */ 9716 9717 static int lcdshadow_state; 9718 9719 static int lcdshadow_on_off(bool state) 9720 { 9721 acpi_handle set_shadow_handle; 9722 int output; 9723 9724 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSSS", &set_shadow_handle))) { 9725 pr_warn("Thinkpad ACPI has no %s interface.\n", "SSSS"); 9726 return -EIO; 9727 } 9728 9729 if (!acpi_evalf(set_shadow_handle, &output, NULL, "dd", (int)state)) 9730 return -EIO; 9731 9732 lcdshadow_state = state; 9733 return 0; 9734 } 9735 9736 static int lcdshadow_set(bool on) 9737 { 9738 if (lcdshadow_state < 0) 9739 return lcdshadow_state; 9740 if (lcdshadow_state == on) 9741 return 0; 9742 return lcdshadow_on_off(on); 9743 } 9744 9745 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm) 9746 { 9747 acpi_handle get_shadow_handle; 9748 int output; 9749 9750 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSSS", &get_shadow_handle))) { 9751 lcdshadow_state = -ENODEV; 9752 return 0; 9753 } 9754 9755 if (!acpi_evalf(get_shadow_handle, &output, NULL, "dd", 0)) { 9756 lcdshadow_state = -EIO; 9757 return -EIO; 9758 } 9759 if (!(output & 0x10000)) { 9760 lcdshadow_state = -ENODEV; 9761 return 0; 9762 } 9763 lcdshadow_state = output & 0x1; 9764 9765 return 0; 9766 } 9767 9768 static void lcdshadow_resume(void) 9769 { 9770 if (lcdshadow_state >= 0) 9771 lcdshadow_on_off(lcdshadow_state); 9772 } 9773 9774 static int lcdshadow_read(struct seq_file *m) 9775 { 9776 if (lcdshadow_state < 0) { 9777 seq_puts(m, "status:\t\tnot supported\n"); 9778 } else { 9779 seq_printf(m, "status:\t\t%d\n", lcdshadow_state); 9780 seq_puts(m, "commands:\t0, 1\n"); 9781 } 9782 9783 return 0; 9784 } 9785 9786 static int lcdshadow_write(char *buf) 9787 { 9788 char *cmd; 9789 int state = -1; 9790 9791 if (lcdshadow_state < 0) 9792 return -ENODEV; 9793 9794 while ((cmd = next_cmd(&buf))) { 9795 if (strlencmp(cmd, "0") == 0) 9796 state = 0; 9797 else if (strlencmp(cmd, "1") == 0) 9798 state = 1; 9799 } 9800 9801 if (state == -1) 9802 return -EINVAL; 9803 9804 return lcdshadow_set(state); 9805 } 9806 9807 static struct ibm_struct lcdshadow_driver_data = { 9808 .name = "lcdshadow", 9809 .resume = lcdshadow_resume, 9810 .read = lcdshadow_read, 9811 .write = lcdshadow_write, 9812 }; 9813 9814 /**************************************************************************** 9815 **************************************************************************** 9816 * 9817 * Infrastructure 9818 * 9819 **************************************************************************** 9820 ****************************************************************************/ 9821 9822 /* 9823 * HKEY event callout for other subdrivers go here 9824 * (yes, it is ugly, but it is quick, safe, and gets the job done 9825 */ 9826 static void tpacpi_driver_event(const unsigned int hkey_event) 9827 { 9828 if (ibm_backlight_device) { 9829 switch (hkey_event) { 9830 case TP_HKEY_EV_BRGHT_UP: 9831 case TP_HKEY_EV_BRGHT_DOWN: 9832 tpacpi_brightness_notify_change(); 9833 } 9834 } 9835 if (alsa_card) { 9836 switch (hkey_event) { 9837 case TP_HKEY_EV_VOL_UP: 9838 case TP_HKEY_EV_VOL_DOWN: 9839 case TP_HKEY_EV_VOL_MUTE: 9840 volume_alsa_notify_change(); 9841 } 9842 } 9843 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) { 9844 enum led_brightness brightness; 9845 9846 mutex_lock(&kbdlight_mutex); 9847 9848 /* 9849 * Check the brightness actually changed, setting the brightness 9850 * through kbdlight_set_level() also triggers this event. 9851 */ 9852 brightness = kbdlight_sysfs_get(NULL); 9853 if (kbdlight_brightness != brightness) { 9854 kbdlight_brightness = brightness; 9855 led_classdev_notify_brightness_hw_changed( 9856 &tpacpi_led_kbdlight.led_classdev, brightness); 9857 } 9858 9859 mutex_unlock(&kbdlight_mutex); 9860 } 9861 } 9862 9863 static void hotkey_driver_event(const unsigned int scancode) 9864 { 9865 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9866 } 9867 9868 /* --------------------------------------------------------------------- */ 9869 9870 /* /proc support */ 9871 static struct proc_dir_entry *proc_dir; 9872 9873 /* 9874 * Module and infrastructure proble, init and exit handling 9875 */ 9876 9877 static bool force_load; 9878 9879 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9880 static const char * __init str_supported(int is_supported) 9881 { 9882 static char text_unsupported[] __initdata = "not supported"; 9883 9884 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9885 } 9886 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9887 9888 static void ibm_exit(struct ibm_struct *ibm) 9889 { 9890 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9891 9892 list_del_init(&ibm->all_drivers); 9893 9894 if (ibm->flags.acpi_notify_installed) { 9895 dbg_printk(TPACPI_DBG_EXIT, 9896 "%s: acpi_remove_notify_handler\n", ibm->name); 9897 BUG_ON(!ibm->acpi); 9898 acpi_remove_notify_handler(*ibm->acpi->handle, 9899 ibm->acpi->type, 9900 dispatch_acpi_notify); 9901 ibm->flags.acpi_notify_installed = 0; 9902 } 9903 9904 if (ibm->flags.proc_created) { 9905 dbg_printk(TPACPI_DBG_EXIT, 9906 "%s: remove_proc_entry\n", ibm->name); 9907 remove_proc_entry(ibm->name, proc_dir); 9908 ibm->flags.proc_created = 0; 9909 } 9910 9911 if (ibm->flags.acpi_driver_registered) { 9912 dbg_printk(TPACPI_DBG_EXIT, 9913 "%s: acpi_bus_unregister_driver\n", ibm->name); 9914 BUG_ON(!ibm->acpi); 9915 acpi_bus_unregister_driver(ibm->acpi->driver); 9916 kfree(ibm->acpi->driver); 9917 ibm->acpi->driver = NULL; 9918 ibm->flags.acpi_driver_registered = 0; 9919 } 9920 9921 if (ibm->flags.init_called && ibm->exit) { 9922 ibm->exit(); 9923 ibm->flags.init_called = 0; 9924 } 9925 9926 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9927 } 9928 9929 static int __init ibm_init(struct ibm_init_struct *iibm) 9930 { 9931 int ret; 9932 struct ibm_struct *ibm = iibm->data; 9933 struct proc_dir_entry *entry; 9934 9935 BUG_ON(ibm == NULL); 9936 9937 INIT_LIST_HEAD(&ibm->all_drivers); 9938 9939 if (ibm->flags.experimental && !experimental) 9940 return 0; 9941 9942 dbg_printk(TPACPI_DBG_INIT, 9943 "probing for %s\n", ibm->name); 9944 9945 if (iibm->init) { 9946 ret = iibm->init(iibm); 9947 if (ret > 0) 9948 return 0; /* probe failed */ 9949 if (ret) 9950 return ret; 9951 9952 ibm->flags.init_called = 1; 9953 } 9954 9955 if (ibm->acpi) { 9956 if (ibm->acpi->hid) { 9957 ret = register_tpacpi_subdriver(ibm); 9958 if (ret) 9959 goto err_out; 9960 } 9961 9962 if (ibm->acpi->notify) { 9963 ret = setup_acpi_notify(ibm); 9964 if (ret == -ENODEV) { 9965 pr_notice("disabling subdriver %s\n", 9966 ibm->name); 9967 ret = 0; 9968 goto err_out; 9969 } 9970 if (ret < 0) 9971 goto err_out; 9972 } 9973 } 9974 9975 dbg_printk(TPACPI_DBG_INIT, 9976 "%s installed\n", ibm->name); 9977 9978 if (ibm->read) { 9979 umode_t mode = iibm->base_procfs_mode; 9980 9981 if (!mode) 9982 mode = S_IRUGO; 9983 if (ibm->write) 9984 mode |= S_IWUSR; 9985 entry = proc_create_data(ibm->name, mode, proc_dir, 9986 &dispatch_proc_ops, ibm); 9987 if (!entry) { 9988 pr_err("unable to create proc entry %s\n", ibm->name); 9989 ret = -ENODEV; 9990 goto err_out; 9991 } 9992 ibm->flags.proc_created = 1; 9993 } 9994 9995 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9996 9997 return 0; 9998 9999 err_out: 10000 dbg_printk(TPACPI_DBG_INIT, 10001 "%s: at error exit path with result %d\n", 10002 ibm->name, ret); 10003 10004 ibm_exit(ibm); 10005 return (ret < 0) ? ret : 0; 10006 } 10007 10008 /* Probing */ 10009 10010 static char __init tpacpi_parse_fw_id(const char * const s, 10011 u32 *model, u16 *release) 10012 { 10013 int i; 10014 10015 if (!s || strlen(s) < 8) 10016 goto invalid; 10017 10018 for (i = 0; i < 8; i++) 10019 if (!((s[i] >= '0' && s[i] <= '9') || 10020 (s[i] >= 'A' && s[i] <= 'Z'))) 10021 goto invalid; 10022 10023 /* 10024 * Most models: xxyTkkWW (#.##c) 10025 * Ancient 570/600 and -SL lacks (#.##c) 10026 */ 10027 if (s[3] == 'T' || s[3] == 'N') { 10028 *model = TPID(s[0], s[1]); 10029 *release = TPVER(s[4], s[5]); 10030 return s[2]; 10031 10032 /* New models: xxxyTkkW (#.##c); T550 and some others */ 10033 } else if (s[4] == 'T' || s[4] == 'N') { 10034 *model = TPID3(s[0], s[1], s[2]); 10035 *release = TPVER(s[5], s[6]); 10036 return s[3]; 10037 } 10038 10039 invalid: 10040 return '\0'; 10041 } 10042 10043 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private) 10044 { 10045 char *ec_fw_string = (char *) private; 10046 const char *dmi_data = (const char *)dm; 10047 /* 10048 * ThinkPad Embedded Controller Program Table on newer models 10049 * 10050 * Offset | Name | Width | Description 10051 * ---------------------------------------------------- 10052 * 0x00 | Type | BYTE | 0x8C 10053 * 0x01 | Length | BYTE | 10054 * 0x02 | Handle | WORD | Varies 10055 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO" 10056 * 0x0A | OEM struct offset | BYTE | 0x0B 10057 * 0x0B | OEM struct number | BYTE | 0x07, for this structure 10058 * 0x0C | OEM struct revision | BYTE | 0x01, for this format 10059 * 0x0D | ECP version ID | STR ID | 10060 * 0x0E | ECP release date | STR ID | 10061 */ 10062 10063 /* Return if data structure not match */ 10064 if (dm->type != 140 || dm->length < 0x0F || 10065 memcmp(dmi_data + 4, "LENOVO", 6) != 0 || 10066 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 || 10067 dmi_data[0x0C] != 0x01) 10068 return; 10069 10070 /* fwstr is the first 8byte string */ 10071 strncpy(ec_fw_string, dmi_data + 0x0F, 8); 10072 } 10073 10074 /* returns 0 - probe ok, or < 0 - probe error. 10075 * Probe ok doesn't mean thinkpad found. 10076 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 10077 static int __must_check __init get_thinkpad_model_data( 10078 struct thinkpad_id_data *tp) 10079 { 10080 const struct dmi_device *dev = NULL; 10081 char ec_fw_string[18] = {0}; 10082 char const *s; 10083 char t; 10084 10085 if (!tp) 10086 return -EINVAL; 10087 10088 memset(tp, 0, sizeof(*tp)); 10089 10090 if (dmi_name_in_vendors("IBM")) 10091 tp->vendor = PCI_VENDOR_ID_IBM; 10092 else if (dmi_name_in_vendors("LENOVO")) 10093 tp->vendor = PCI_VENDOR_ID_LENOVO; 10094 else 10095 return 0; 10096 10097 s = dmi_get_system_info(DMI_BIOS_VERSION); 10098 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 10099 if (s && !tp->bios_version_str) 10100 return -ENOMEM; 10101 10102 /* Really ancient ThinkPad 240X will fail this, which is fine */ 10103 t = tpacpi_parse_fw_id(tp->bios_version_str, 10104 &tp->bios_model, &tp->bios_release); 10105 if (t != 'E' && t != 'C') 10106 return 0; 10107 10108 /* 10109 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 10110 * X32 or newer, all Z series; Some models must have an 10111 * up-to-date BIOS or they will not be detected. 10112 * 10113 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10114 */ 10115 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 10116 if (sscanf(dev->name, 10117 "IBM ThinkPad Embedded Controller -[%17c", 10118 ec_fw_string) == 1) { 10119 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 10120 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 10121 break; 10122 } 10123 } 10124 10125 /* Newer ThinkPads have different EC program info table */ 10126 if (!ec_fw_string[0]) 10127 dmi_walk(find_new_ec_fwstr, &ec_fw_string); 10128 10129 if (ec_fw_string[0]) { 10130 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 10131 if (!tp->ec_version_str) 10132 return -ENOMEM; 10133 10134 t = tpacpi_parse_fw_id(ec_fw_string, 10135 &tp->ec_model, &tp->ec_release); 10136 if (t != 'H') { 10137 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n", 10138 ec_fw_string); 10139 pr_notice("please report this to %s\n", TPACPI_MAIL); 10140 } 10141 } 10142 10143 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 10144 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 10145 tp->model_str = kstrdup(s, GFP_KERNEL); 10146 if (!tp->model_str) 10147 return -ENOMEM; 10148 } else { 10149 s = dmi_get_system_info(DMI_BIOS_VENDOR); 10150 if (s && !(strncasecmp(s, "Lenovo", 6))) { 10151 tp->model_str = kstrdup(s, GFP_KERNEL); 10152 if (!tp->model_str) 10153 return -ENOMEM; 10154 } 10155 } 10156 10157 s = dmi_get_system_info(DMI_PRODUCT_NAME); 10158 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 10159 if (s && !tp->nummodel_str) 10160 return -ENOMEM; 10161 10162 return 0; 10163 } 10164 10165 static int __init probe_for_thinkpad(void) 10166 { 10167 int is_thinkpad; 10168 10169 if (acpi_disabled) 10170 return -ENODEV; 10171 10172 /* It would be dangerous to run the driver in this case */ 10173 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 10174 return -ENODEV; 10175 10176 /* 10177 * Non-ancient models have better DMI tagging, but very old models 10178 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 10179 */ 10180 is_thinkpad = (thinkpad_id.model_str != NULL) || 10181 (thinkpad_id.ec_model != 0) || 10182 tpacpi_is_fw_known(); 10183 10184 /* The EC handler is required */ 10185 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 10186 if (!ec_handle) { 10187 if (is_thinkpad) 10188 pr_err("Not yet supported ThinkPad detected!\n"); 10189 return -ENODEV; 10190 } 10191 10192 if (!is_thinkpad && !force_load) 10193 return -ENODEV; 10194 10195 return 0; 10196 } 10197 10198 static void __init thinkpad_acpi_init_banner(void) 10199 { 10200 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 10201 pr_info("%s\n", TPACPI_URL); 10202 10203 pr_info("ThinkPad BIOS %s, EC %s\n", 10204 (thinkpad_id.bios_version_str) ? 10205 thinkpad_id.bios_version_str : "unknown", 10206 (thinkpad_id.ec_version_str) ? 10207 thinkpad_id.ec_version_str : "unknown"); 10208 10209 BUG_ON(!thinkpad_id.vendor); 10210 10211 if (thinkpad_id.model_str) 10212 pr_info("%s %s, model %s\n", 10213 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 10214 "IBM" : ((thinkpad_id.vendor == 10215 PCI_VENDOR_ID_LENOVO) ? 10216 "Lenovo" : "Unknown vendor"), 10217 thinkpad_id.model_str, 10218 (thinkpad_id.nummodel_str) ? 10219 thinkpad_id.nummodel_str : "unknown"); 10220 } 10221 10222 /* Module init, exit, parameters */ 10223 10224 static struct ibm_init_struct ibms_init[] __initdata = { 10225 { 10226 .data = &thinkpad_acpi_driver_data, 10227 }, 10228 { 10229 .init = hotkey_init, 10230 .data = &hotkey_driver_data, 10231 }, 10232 { 10233 .init = bluetooth_init, 10234 .data = &bluetooth_driver_data, 10235 }, 10236 { 10237 .init = wan_init, 10238 .data = &wan_driver_data, 10239 }, 10240 { 10241 .init = uwb_init, 10242 .data = &uwb_driver_data, 10243 }, 10244 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 10245 { 10246 .init = video_init, 10247 .base_procfs_mode = S_IRUSR, 10248 .data = &video_driver_data, 10249 }, 10250 #endif 10251 { 10252 .init = kbdlight_init, 10253 .data = &kbdlight_driver_data, 10254 }, 10255 { 10256 .init = light_init, 10257 .data = &light_driver_data, 10258 }, 10259 { 10260 .init = cmos_init, 10261 .data = &cmos_driver_data, 10262 }, 10263 { 10264 .init = led_init, 10265 .data = &led_driver_data, 10266 }, 10267 { 10268 .init = beep_init, 10269 .data = &beep_driver_data, 10270 }, 10271 { 10272 .init = thermal_init, 10273 .data = &thermal_driver_data, 10274 }, 10275 { 10276 .init = brightness_init, 10277 .data = &brightness_driver_data, 10278 }, 10279 { 10280 .init = volume_init, 10281 .data = &volume_driver_data, 10282 }, 10283 { 10284 .init = fan_init, 10285 .data = &fan_driver_data, 10286 }, 10287 { 10288 .init = mute_led_init, 10289 .data = &mute_led_driver_data, 10290 }, 10291 { 10292 .init = tpacpi_battery_init, 10293 .data = &battery_driver_data, 10294 }, 10295 { 10296 .init = tpacpi_lcdshadow_init, 10297 .data = &lcdshadow_driver_data, 10298 }, 10299 }; 10300 10301 static int __init set_ibm_param(const char *val, const struct kernel_param *kp) 10302 { 10303 unsigned int i; 10304 struct ibm_struct *ibm; 10305 10306 if (!kp || !kp->name || !val) 10307 return -EINVAL; 10308 10309 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10310 ibm = ibms_init[i].data; 10311 WARN_ON(ibm == NULL); 10312 10313 if (!ibm || !ibm->name) 10314 continue; 10315 10316 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 10317 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 10318 return -ENOSPC; 10319 strcpy(ibms_init[i].param, val); 10320 strcat(ibms_init[i].param, ","); 10321 return 0; 10322 } 10323 } 10324 10325 return -EINVAL; 10326 } 10327 10328 module_param(experimental, int, 0444); 10329 MODULE_PARM_DESC(experimental, 10330 "Enables experimental features when non-zero"); 10331 10332 module_param_named(debug, dbg_level, uint, 0); 10333 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 10334 10335 module_param(force_load, bool, 0444); 10336 MODULE_PARM_DESC(force_load, 10337 "Attempts to load the driver even on a mis-identified ThinkPad when true"); 10338 10339 module_param_named(fan_control, fan_control_allowed, bool, 0444); 10340 MODULE_PARM_DESC(fan_control, 10341 "Enables setting fan parameters features when true"); 10342 10343 module_param_named(brightness_mode, brightness_mode, uint, 0444); 10344 MODULE_PARM_DESC(brightness_mode, 10345 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 10346 10347 module_param(brightness_enable, uint, 0444); 10348 MODULE_PARM_DESC(brightness_enable, 10349 "Enables backlight control when 1, disables when 0"); 10350 10351 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 10352 module_param_named(volume_mode, volume_mode, uint, 0444); 10353 MODULE_PARM_DESC(volume_mode, 10354 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 10355 10356 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 10357 MODULE_PARM_DESC(volume_capabilities, 10358 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only"); 10359 10360 module_param_named(volume_control, volume_control_allowed, bool, 0444); 10361 MODULE_PARM_DESC(volume_control, 10362 "Enables software override for the console audio control when true"); 10363 10364 module_param_named(software_mute, software_mute_requested, bool, 0444); 10365 MODULE_PARM_DESC(software_mute, 10366 "Request full software mute control"); 10367 10368 /* ALSA module API parameters */ 10369 module_param_named(index, alsa_index, int, 0444); 10370 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 10371 module_param_named(id, alsa_id, charp, 0444); 10372 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 10373 module_param_named(enable, alsa_enable, bool, 0444); 10374 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 10375 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 10376 10377 /* The module parameter can't be read back, that's why 0 is used here */ 10378 #define TPACPI_PARAM(feature) \ 10379 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 10380 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation") 10381 10382 TPACPI_PARAM(hotkey); 10383 TPACPI_PARAM(bluetooth); 10384 TPACPI_PARAM(video); 10385 TPACPI_PARAM(light); 10386 TPACPI_PARAM(cmos); 10387 TPACPI_PARAM(led); 10388 TPACPI_PARAM(beep); 10389 TPACPI_PARAM(brightness); 10390 TPACPI_PARAM(volume); 10391 TPACPI_PARAM(fan); 10392 10393 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10394 module_param(dbg_wlswemul, uint, 0444); 10395 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 10396 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 10397 MODULE_PARM_DESC(wlsw_state, 10398 "Initial state of the emulated WLSW switch"); 10399 10400 module_param(dbg_bluetoothemul, uint, 0444); 10401 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 10402 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 10403 MODULE_PARM_DESC(bluetooth_state, 10404 "Initial state of the emulated bluetooth switch"); 10405 10406 module_param(dbg_wwanemul, uint, 0444); 10407 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 10408 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 10409 MODULE_PARM_DESC(wwan_state, 10410 "Initial state of the emulated WWAN switch"); 10411 10412 module_param(dbg_uwbemul, uint, 0444); 10413 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 10414 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 10415 MODULE_PARM_DESC(uwb_state, 10416 "Initial state of the emulated UWB switch"); 10417 #endif 10418 10419 static void thinkpad_acpi_module_exit(void) 10420 { 10421 struct ibm_struct *ibm, *itmp; 10422 10423 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 10424 10425 list_for_each_entry_safe_reverse(ibm, itmp, 10426 &tpacpi_all_drivers, 10427 all_drivers) { 10428 ibm_exit(ibm); 10429 } 10430 10431 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 10432 10433 if (tpacpi_inputdev) { 10434 if (tp_features.input_device_registered) 10435 input_unregister_device(tpacpi_inputdev); 10436 else 10437 input_free_device(tpacpi_inputdev); 10438 kfree(hotkey_keycode_map); 10439 } 10440 10441 if (tpacpi_hwmon) 10442 hwmon_device_unregister(tpacpi_hwmon); 10443 10444 if (tpacpi_sensors_pdev) 10445 platform_device_unregister(tpacpi_sensors_pdev); 10446 if (tpacpi_pdev) 10447 platform_device_unregister(tpacpi_pdev); 10448 10449 if (tp_features.sensors_pdrv_attrs_registered) 10450 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 10451 if (tp_features.platform_drv_attrs_registered) 10452 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 10453 10454 if (tp_features.sensors_pdrv_registered) 10455 platform_driver_unregister(&tpacpi_hwmon_pdriver); 10456 10457 if (tp_features.platform_drv_registered) 10458 platform_driver_unregister(&tpacpi_pdriver); 10459 10460 if (proc_dir) 10461 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 10462 10463 if (tpacpi_wq) 10464 destroy_workqueue(tpacpi_wq); 10465 10466 kfree(thinkpad_id.bios_version_str); 10467 kfree(thinkpad_id.ec_version_str); 10468 kfree(thinkpad_id.model_str); 10469 kfree(thinkpad_id.nummodel_str); 10470 } 10471 10472 10473 static int __init thinkpad_acpi_module_init(void) 10474 { 10475 int ret, i; 10476 10477 tpacpi_lifecycle = TPACPI_LIFE_INIT; 10478 10479 /* Driver-level probe */ 10480 10481 ret = get_thinkpad_model_data(&thinkpad_id); 10482 if (ret) { 10483 pr_err("unable to get DMI data: %d\n", ret); 10484 thinkpad_acpi_module_exit(); 10485 return ret; 10486 } 10487 ret = probe_for_thinkpad(); 10488 if (ret) { 10489 thinkpad_acpi_module_exit(); 10490 return ret; 10491 } 10492 10493 /* Driver initialization */ 10494 10495 thinkpad_acpi_init_banner(); 10496 tpacpi_check_outdated_fw(); 10497 10498 TPACPI_ACPIHANDLE_INIT(ecrd); 10499 TPACPI_ACPIHANDLE_INIT(ecwr); 10500 10501 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 10502 if (!tpacpi_wq) { 10503 thinkpad_acpi_module_exit(); 10504 return -ENOMEM; 10505 } 10506 10507 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 10508 if (!proc_dir) { 10509 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 10510 thinkpad_acpi_module_exit(); 10511 return -ENODEV; 10512 } 10513 10514 ret = platform_driver_register(&tpacpi_pdriver); 10515 if (ret) { 10516 pr_err("unable to register main platform driver\n"); 10517 thinkpad_acpi_module_exit(); 10518 return ret; 10519 } 10520 tp_features.platform_drv_registered = 1; 10521 10522 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 10523 if (ret) { 10524 pr_err("unable to register hwmon platform driver\n"); 10525 thinkpad_acpi_module_exit(); 10526 return ret; 10527 } 10528 tp_features.sensors_pdrv_registered = 1; 10529 10530 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 10531 if (!ret) { 10532 tp_features.platform_drv_attrs_registered = 1; 10533 ret = tpacpi_create_driver_attributes( 10534 &tpacpi_hwmon_pdriver.driver); 10535 } 10536 if (ret) { 10537 pr_err("unable to create sysfs driver attributes\n"); 10538 thinkpad_acpi_module_exit(); 10539 return ret; 10540 } 10541 tp_features.sensors_pdrv_attrs_registered = 1; 10542 10543 10544 /* Device initialization */ 10545 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 10546 NULL, 0); 10547 if (IS_ERR(tpacpi_pdev)) { 10548 ret = PTR_ERR(tpacpi_pdev); 10549 tpacpi_pdev = NULL; 10550 pr_err("unable to register platform device\n"); 10551 thinkpad_acpi_module_exit(); 10552 return ret; 10553 } 10554 tpacpi_sensors_pdev = platform_device_register_simple( 10555 TPACPI_HWMON_DRVR_NAME, 10556 -1, NULL, 0); 10557 if (IS_ERR(tpacpi_sensors_pdev)) { 10558 ret = PTR_ERR(tpacpi_sensors_pdev); 10559 tpacpi_sensors_pdev = NULL; 10560 pr_err("unable to register hwmon platform device\n"); 10561 thinkpad_acpi_module_exit(); 10562 return ret; 10563 } 10564 tp_features.sensors_pdev_attrs_registered = 1; 10565 tpacpi_hwmon = hwmon_device_register_with_groups( 10566 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL); 10567 10568 if (IS_ERR(tpacpi_hwmon)) { 10569 ret = PTR_ERR(tpacpi_hwmon); 10570 tpacpi_hwmon = NULL; 10571 pr_err("unable to register hwmon device\n"); 10572 thinkpad_acpi_module_exit(); 10573 return ret; 10574 } 10575 mutex_init(&tpacpi_inputdev_send_mutex); 10576 tpacpi_inputdev = input_allocate_device(); 10577 if (!tpacpi_inputdev) { 10578 thinkpad_acpi_module_exit(); 10579 return -ENOMEM; 10580 } else { 10581 /* Prepare input device, but don't register */ 10582 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 10583 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 10584 tpacpi_inputdev->id.bustype = BUS_HOST; 10585 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 10586 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 10587 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 10588 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 10589 } 10590 10591 /* Init subdriver dependencies */ 10592 tpacpi_detect_brightness_capabilities(); 10593 10594 /* Init subdrivers */ 10595 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10596 ret = ibm_init(&ibms_init[i]); 10597 if (ret >= 0 && *ibms_init[i].param) 10598 ret = ibms_init[i].data->write(ibms_init[i].param); 10599 if (ret < 0) { 10600 thinkpad_acpi_module_exit(); 10601 return ret; 10602 } 10603 } 10604 10605 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 10606 10607 ret = input_register_device(tpacpi_inputdev); 10608 if (ret < 0) { 10609 pr_err("unable to register input device\n"); 10610 thinkpad_acpi_module_exit(); 10611 return ret; 10612 } else { 10613 tp_features.input_device_registered = 1; 10614 } 10615 10616 return 0; 10617 } 10618 10619 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 10620 10621 /* 10622 * This will autoload the driver in almost every ThinkPad 10623 * in widespread use. 10624 * 10625 * Only _VERY_ old models, like the 240, 240x and 570 lack 10626 * the HKEY event interface. 10627 */ 10628 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 10629 10630 /* 10631 * DMI matching for module autoloading 10632 * 10633 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10634 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 10635 * 10636 * Only models listed in thinkwiki will be supported, so add yours 10637 * if it is not there yet. 10638 */ 10639 #define IBM_BIOS_MODULE_ALIAS(__type) \ 10640 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 10641 10642 /* Ancient thinkpad BIOSes have to be identified by 10643 * BIOS type or model number, and there are far less 10644 * BIOS types than model numbers... */ 10645 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 10646 10647 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 10648 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 10649 MODULE_DESCRIPTION(TPACPI_DESC); 10650 MODULE_VERSION(TPACPI_VERSION); 10651 MODULE_LICENSE("GPL"); 10652 10653 module_init(thinkpad_acpi_module_init); 10654 module_exit(thinkpad_acpi_module_exit); 10655