1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * thinkpad_acpi.c - ThinkPad ACPI Extras 4 * 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net> 6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br> 7 */ 8 9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 10 11 #define TPACPI_VERSION "0.26" 12 #define TPACPI_SYSFS_VERSION 0x030000 13 14 /* 15 * Changelog: 16 * 2007-10-20 changelog trimmed down 17 * 18 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 19 * drivers/misc. 20 * 21 * 2006-11-22 0.13 new maintainer 22 * changelog now lives in git commit history, and will 23 * not be updated further in-file. 24 * 25 * 2005-03-17 0.11 support for 600e, 770x 26 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 27 * 28 * 2005-01-16 0.9 use MODULE_VERSION 29 * thanks to Henrik Brix Andersen <brix@gentoo.org> 30 * fix parameter passing on module loading 31 * thanks to Rusty Russell <rusty@rustcorp.com.au> 32 * thanks to Jim Radford <radford@blackbean.org> 33 * 2004-11-08 0.8 fix init error case, don't return from a macro 34 * thanks to Chris Wright <chrisw@osdl.org> 35 */ 36 37 #include <linux/kernel.h> 38 #include <linux/module.h> 39 #include <linux/init.h> 40 #include <linux/types.h> 41 #include <linux/string.h> 42 #include <linux/list.h> 43 #include <linux/mutex.h> 44 #include <linux/sched.h> 45 #include <linux/sched/signal.h> 46 #include <linux/kthread.h> 47 #include <linux/freezer.h> 48 #include <linux/delay.h> 49 #include <linux/slab.h> 50 #include <linux/nvram.h> 51 #include <linux/proc_fs.h> 52 #include <linux/seq_file.h> 53 #include <linux/sysfs.h> 54 #include <linux/backlight.h> 55 #include <linux/bitops.h> 56 #include <linux/fb.h> 57 #include <linux/platform_device.h> 58 #include <linux/hwmon.h> 59 #include <linux/hwmon-sysfs.h> 60 #include <linux/input.h> 61 #include <linux/leds.h> 62 #include <linux/rfkill.h> 63 #include <linux/dmi.h> 64 #include <linux/jiffies.h> 65 #include <linux/workqueue.h> 66 #include <linux/acpi.h> 67 #include <linux/pci.h> 68 #include <linux/power_supply.h> 69 #include <sound/core.h> 70 #include <sound/control.h> 71 #include <sound/initval.h> 72 #include <linux/uaccess.h> 73 #include <acpi/battery.h> 74 #include <acpi/video.h> 75 76 /* ThinkPad CMOS commands */ 77 #define TP_CMOS_VOLUME_DOWN 0 78 #define TP_CMOS_VOLUME_UP 1 79 #define TP_CMOS_VOLUME_MUTE 2 80 #define TP_CMOS_BRIGHTNESS_UP 4 81 #define TP_CMOS_BRIGHTNESS_DOWN 5 82 #define TP_CMOS_THINKLIGHT_ON 12 83 #define TP_CMOS_THINKLIGHT_OFF 13 84 85 /* NVRAM Addresses */ 86 enum tp_nvram_addr { 87 TP_NVRAM_ADDR_HK2 = 0x57, 88 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 89 TP_NVRAM_ADDR_VIDEO = 0x59, 90 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 91 TP_NVRAM_ADDR_MIXER = 0x60, 92 }; 93 94 /* NVRAM bit masks */ 95 enum { 96 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 97 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 98 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 99 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 100 TP_NVRAM_MASK_THINKLIGHT = 0x10, 101 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 102 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 103 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 104 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 105 TP_NVRAM_MASK_MUTE = 0x40, 106 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 107 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 108 TP_NVRAM_POS_LEVEL_VOLUME = 0, 109 }; 110 111 /* Misc NVRAM-related */ 112 enum { 113 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 114 }; 115 116 /* ACPI HIDs */ 117 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 118 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 119 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID "LEN0268" 120 #define TPACPI_ACPI_EC_HID "PNP0C09" 121 122 /* Input IDs */ 123 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 124 #define TPACPI_HKEY_INPUT_VERSION 0x4101 125 126 /* ACPI \WGSV commands */ 127 enum { 128 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 129 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 130 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 131 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 132 }; 133 134 /* TP_ACPI_WGSV_GET_STATE bits */ 135 enum { 136 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 137 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 138 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 139 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 140 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 141 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 142 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 143 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 144 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 145 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 146 }; 147 148 /* HKEY events */ 149 enum tpacpi_hkey_event_t { 150 /* Hotkey-related */ 151 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 152 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 153 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 154 TP_HKEY_EV_KBD_LIGHT = 0x1012, /* Thinklight/kbd backlight */ 155 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 156 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 157 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 158 159 /* Reasons for waking up from S3/S4 */ 160 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 161 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 162 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 163 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 164 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 165 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 166 167 /* Auto-sleep after eject request */ 168 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 169 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 170 171 /* Misc bay events */ 172 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 173 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 174 or port replicator */ 175 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 176 dock or port replicator */ 177 178 /* User-interface events */ 179 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 180 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 181 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 182 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 183 TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016): 184 * enter/leave tablet mode 185 */ 186 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 187 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 188 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 189 190 /* Key-related user-interface events */ 191 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 192 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 193 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */ 194 195 /* Thermal events */ 196 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 197 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 198 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 199 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 200 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* windows; thermal table changed */ 201 TP_HKEY_EV_THM_CSM_COMPLETED = 0x6032, /* windows; thermal control set 202 * command completed. Related to 203 * AML DYTC */ 204 TP_HKEY_EV_THM_TRANSFM_CHANGED = 0x60F0, /* windows; thermal transformation 205 * changed. Related to AML GMTS */ 206 207 /* AC-related events */ 208 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 209 210 /* Further user-interface events */ 211 TP_HKEY_EV_PALM_DETECTED = 0x60b0, /* palm hoveres keyboard */ 212 TP_HKEY_EV_PALM_UNDETECTED = 0x60b1, /* palm removed */ 213 214 /* Misc */ 215 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 216 }; 217 218 /**************************************************************************** 219 * Main driver 220 */ 221 222 #define TPACPI_NAME "thinkpad" 223 #define TPACPI_DESC "ThinkPad ACPI Extras" 224 #define TPACPI_FILE TPACPI_NAME "_acpi" 225 #define TPACPI_URL "http://ibm-acpi.sf.net/" 226 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 227 228 #define TPACPI_PROC_DIR "ibm" 229 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 230 #define TPACPI_DRVR_NAME TPACPI_FILE 231 #define TPACPI_DRVR_SHORTNAME "tpacpi" 232 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 233 234 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 235 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 236 237 #define TPACPI_MAX_ACPI_ARGS 3 238 239 /* Debugging printk groups */ 240 #define TPACPI_DBG_ALL 0xffff 241 #define TPACPI_DBG_DISCLOSETASK 0x8000 242 #define TPACPI_DBG_INIT 0x0001 243 #define TPACPI_DBG_EXIT 0x0002 244 #define TPACPI_DBG_RFKILL 0x0004 245 #define TPACPI_DBG_HKEY 0x0008 246 #define TPACPI_DBG_FAN 0x0010 247 #define TPACPI_DBG_BRGHT 0x0020 248 #define TPACPI_DBG_MIXER 0x0040 249 250 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 251 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 252 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 253 254 255 /**************************************************************************** 256 * Driver-wide structs and misc. variables 257 */ 258 259 struct ibm_struct; 260 261 struct tp_acpi_drv_struct { 262 const struct acpi_device_id *hid; 263 struct acpi_driver *driver; 264 265 void (*notify) (struct ibm_struct *, u32); 266 acpi_handle *handle; 267 u32 type; 268 struct acpi_device *device; 269 }; 270 271 struct ibm_struct { 272 char *name; 273 274 int (*read) (struct seq_file *); 275 int (*write) (char *); 276 void (*exit) (void); 277 void (*resume) (void); 278 void (*suspend) (void); 279 void (*shutdown) (void); 280 281 struct list_head all_drivers; 282 283 struct tp_acpi_drv_struct *acpi; 284 285 struct { 286 u8 acpi_driver_registered:1; 287 u8 acpi_notify_installed:1; 288 u8 proc_created:1; 289 u8 init_called:1; 290 u8 experimental:1; 291 } flags; 292 }; 293 294 struct ibm_init_struct { 295 char param[32]; 296 297 int (*init) (struct ibm_init_struct *); 298 umode_t base_procfs_mode; 299 struct ibm_struct *data; 300 }; 301 302 static struct { 303 u32 bluetooth:1; 304 u32 hotkey:1; 305 u32 hotkey_mask:1; 306 u32 hotkey_wlsw:1; 307 enum { 308 TP_HOTKEY_TABLET_NONE = 0, 309 TP_HOTKEY_TABLET_USES_MHKG, 310 TP_HOTKEY_TABLET_USES_GMMS, 311 } hotkey_tablet; 312 u32 kbdlight:1; 313 u32 light:1; 314 u32 light_status:1; 315 u32 bright_acpimode:1; 316 u32 bright_unkfw:1; 317 u32 wan:1; 318 u32 uwb:1; 319 u32 fan_ctrl_status_undef:1; 320 u32 second_fan:1; 321 u32 beep_needs_two_args:1; 322 u32 mixer_no_level_control:1; 323 u32 battery_force_primary:1; 324 u32 input_device_registered:1; 325 u32 platform_drv_registered:1; 326 u32 platform_drv_attrs_registered:1; 327 u32 sensors_pdrv_registered:1; 328 u32 sensors_pdrv_attrs_registered:1; 329 u32 sensors_pdev_attrs_registered:1; 330 u32 hotkey_poll_active:1; 331 u32 has_adaptive_kbd:1; 332 } tp_features; 333 334 static struct { 335 u16 hotkey_mask_ff:1; 336 u16 volume_ctrl_forbidden:1; 337 } tp_warned; 338 339 struct thinkpad_id_data { 340 unsigned int vendor; /* ThinkPad vendor: 341 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 342 343 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 344 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 345 346 u32 bios_model; /* 1Y = 0x3159, 0 = unknown */ 347 u32 ec_model; 348 u16 bios_release; /* 1ZETK1WW = 0x4b31, 0 = unknown */ 349 u16 ec_release; 350 351 char *model_str; /* ThinkPad T43 */ 352 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 353 }; 354 static struct thinkpad_id_data thinkpad_id; 355 356 static enum { 357 TPACPI_LIFE_INIT = 0, 358 TPACPI_LIFE_RUNNING, 359 TPACPI_LIFE_EXITING, 360 } tpacpi_lifecycle; 361 362 static int experimental; 363 static u32 dbg_level; 364 365 static struct workqueue_struct *tpacpi_wq; 366 367 enum led_status_t { 368 TPACPI_LED_OFF = 0, 369 TPACPI_LED_ON, 370 TPACPI_LED_BLINK, 371 }; 372 373 /* tpacpi LED class */ 374 struct tpacpi_led_classdev { 375 struct led_classdev led_classdev; 376 int led; 377 }; 378 379 /* brightness level capabilities */ 380 static unsigned int bright_maxlvl; /* 0 = unknown */ 381 382 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 383 static int dbg_wlswemul; 384 static bool tpacpi_wlsw_emulstate; 385 static int dbg_bluetoothemul; 386 static bool tpacpi_bluetooth_emulstate; 387 static int dbg_wwanemul; 388 static bool tpacpi_wwan_emulstate; 389 static int dbg_uwbemul; 390 static bool tpacpi_uwb_emulstate; 391 #endif 392 393 394 /************************************************************************* 395 * Debugging helpers 396 */ 397 398 #define dbg_printk(a_dbg_level, format, arg...) \ 399 do { \ 400 if (dbg_level & (a_dbg_level)) \ 401 printk(KERN_DEBUG pr_fmt("%s: " format), \ 402 __func__, ##arg); \ 403 } while (0) 404 405 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 406 #define vdbg_printk dbg_printk 407 static const char *str_supported(int is_supported); 408 #else 409 static inline const char *str_supported(int is_supported) { return ""; } 410 #define vdbg_printk(a_dbg_level, format, arg...) \ 411 do { if (0) no_printk(format, ##arg); } while (0) 412 #endif 413 414 static void tpacpi_log_usertask(const char * const what) 415 { 416 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 417 what, task_tgid_vnr(current)); 418 } 419 420 #define tpacpi_disclose_usertask(what, format, arg...) \ 421 do { \ 422 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 423 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 424 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 425 what, task_tgid_vnr(current), ## arg); \ 426 } \ 427 } while (0) 428 429 /* 430 * Quirk handling helpers 431 * 432 * ThinkPad IDs and versions seen in the field so far are 433 * two or three characters from the set [0-9A-Z], i.e. base 36. 434 * 435 * We use values well outside that range as specials. 436 */ 437 438 #define TPACPI_MATCH_ANY 0xffffffffU 439 #define TPACPI_MATCH_ANY_VERSION 0xffffU 440 #define TPACPI_MATCH_UNKNOWN 0U 441 442 /* TPID('1', 'Y') == 0x3159 */ 443 #define TPID(__c1, __c2) (((__c1) << 8) | (__c2)) 444 #define TPID3(__c1, __c2, __c3) (((__c1) << 16) | ((__c2) << 8) | (__c3)) 445 #define TPVER TPID 446 447 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 448 { .vendor = PCI_VENDOR_ID_IBM, \ 449 .bios = TPID(__id1, __id2), \ 450 .ec = TPACPI_MATCH_ANY, \ 451 .quirks = (__quirk) } 452 453 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 454 { .vendor = PCI_VENDOR_ID_LENOVO, \ 455 .bios = TPID(__id1, __id2), \ 456 .ec = TPACPI_MATCH_ANY, \ 457 .quirks = (__quirk) } 458 459 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \ 460 { .vendor = PCI_VENDOR_ID_LENOVO, \ 461 .bios = TPID3(__id1, __id2, __id3), \ 462 .ec = TPACPI_MATCH_ANY, \ 463 .quirks = (__quirk) } 464 465 #define TPACPI_QEC_IBM(__id1, __id2, __quirk) \ 466 { .vendor = PCI_VENDOR_ID_IBM, \ 467 .bios = TPACPI_MATCH_ANY, \ 468 .ec = TPID(__id1, __id2), \ 469 .quirks = (__quirk) } 470 471 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 472 { .vendor = PCI_VENDOR_ID_LENOVO, \ 473 .bios = TPACPI_MATCH_ANY, \ 474 .ec = TPID(__id1, __id2), \ 475 .quirks = (__quirk) } 476 477 struct tpacpi_quirk { 478 unsigned int vendor; 479 u32 bios; 480 u32 ec; 481 unsigned long quirks; 482 }; 483 484 /** 485 * tpacpi_check_quirks() - search BIOS/EC version on a list 486 * @qlist: array of &struct tpacpi_quirk 487 * @qlist_size: number of elements in @qlist 488 * 489 * Iterates over a quirks list until one is found that matches the 490 * ThinkPad's vendor, BIOS and EC model. 491 * 492 * Returns 0 if nothing matches, otherwise returns the quirks field of 493 * the matching &struct tpacpi_quirk entry. 494 * 495 * The match criteria is: vendor, ec and bios much match. 496 */ 497 static unsigned long __init tpacpi_check_quirks( 498 const struct tpacpi_quirk *qlist, 499 unsigned int qlist_size) 500 { 501 while (qlist_size) { 502 if ((qlist->vendor == thinkpad_id.vendor || 503 qlist->vendor == TPACPI_MATCH_ANY) && 504 (qlist->bios == thinkpad_id.bios_model || 505 qlist->bios == TPACPI_MATCH_ANY) && 506 (qlist->ec == thinkpad_id.ec_model || 507 qlist->ec == TPACPI_MATCH_ANY)) 508 return qlist->quirks; 509 510 qlist_size--; 511 qlist++; 512 } 513 return 0; 514 } 515 516 static inline bool __pure __init tpacpi_is_lenovo(void) 517 { 518 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 519 } 520 521 static inline bool __pure __init tpacpi_is_ibm(void) 522 { 523 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 524 } 525 526 /**************************************************************************** 527 **************************************************************************** 528 * 529 * ACPI Helpers and device model 530 * 531 **************************************************************************** 532 ****************************************************************************/ 533 534 /************************************************************************* 535 * ACPI basic handles 536 */ 537 538 static acpi_handle root_handle; 539 static acpi_handle ec_handle; 540 541 #define TPACPI_HANDLE(object, parent, paths...) \ 542 static acpi_handle object##_handle; \ 543 static const acpi_handle * const object##_parent __initconst = \ 544 &parent##_handle; \ 545 static char *object##_paths[] __initdata = { paths } 546 547 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 548 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 549 550 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 551 /* T4x, X31, X40 */ 552 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 553 "\\CMS", /* R40, R40e */ 554 ); /* all others */ 555 556 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 557 "^HKEY", /* R30, R31 */ 558 "HKEY", /* all others */ 559 ); /* 570 */ 560 561 /************************************************************************* 562 * ACPI helpers 563 */ 564 565 static int acpi_evalf(acpi_handle handle, 566 int *res, char *method, char *fmt, ...) 567 { 568 char *fmt0 = fmt; 569 struct acpi_object_list params; 570 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 571 struct acpi_buffer result, *resultp; 572 union acpi_object out_obj; 573 acpi_status status; 574 va_list ap; 575 char res_type; 576 int success; 577 int quiet; 578 579 if (!*fmt) { 580 pr_err("acpi_evalf() called with empty format\n"); 581 return 0; 582 } 583 584 if (*fmt == 'q') { 585 quiet = 1; 586 fmt++; 587 } else 588 quiet = 0; 589 590 res_type = *(fmt++); 591 592 params.count = 0; 593 params.pointer = &in_objs[0]; 594 595 va_start(ap, fmt); 596 while (*fmt) { 597 char c = *(fmt++); 598 switch (c) { 599 case 'd': /* int */ 600 in_objs[params.count].integer.value = va_arg(ap, int); 601 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 602 break; 603 /* add more types as needed */ 604 default: 605 pr_err("acpi_evalf() called with invalid format character '%c'\n", 606 c); 607 va_end(ap); 608 return 0; 609 } 610 } 611 va_end(ap); 612 613 if (res_type != 'v') { 614 result.length = sizeof(out_obj); 615 result.pointer = &out_obj; 616 resultp = &result; 617 } else 618 resultp = NULL; 619 620 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 621 622 switch (res_type) { 623 case 'd': /* int */ 624 success = (status == AE_OK && 625 out_obj.type == ACPI_TYPE_INTEGER); 626 if (success && res) 627 *res = out_obj.integer.value; 628 break; 629 case 'v': /* void */ 630 success = status == AE_OK; 631 break; 632 /* add more types as needed */ 633 default: 634 pr_err("acpi_evalf() called with invalid format character '%c'\n", 635 res_type); 636 return 0; 637 } 638 639 if (!success && !quiet) 640 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 641 method, fmt0, acpi_format_exception(status)); 642 643 return success; 644 } 645 646 static int acpi_ec_read(int i, u8 *p) 647 { 648 int v; 649 650 if (ecrd_handle) { 651 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 652 return 0; 653 *p = v; 654 } else { 655 if (ec_read(i, p) < 0) 656 return 0; 657 } 658 659 return 1; 660 } 661 662 static int acpi_ec_write(int i, u8 v) 663 { 664 if (ecwr_handle) { 665 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 666 return 0; 667 } else { 668 if (ec_write(i, v) < 0) 669 return 0; 670 } 671 672 return 1; 673 } 674 675 static int issue_thinkpad_cmos_command(int cmos_cmd) 676 { 677 if (!cmos_handle) 678 return -ENXIO; 679 680 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 681 return -EIO; 682 683 return 0; 684 } 685 686 /************************************************************************* 687 * ACPI device model 688 */ 689 690 #define TPACPI_ACPIHANDLE_INIT(object) \ 691 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 692 object##_paths, ARRAY_SIZE(object##_paths)) 693 694 static void __init drv_acpi_handle_init(const char *name, 695 acpi_handle *handle, const acpi_handle parent, 696 char **paths, const int num_paths) 697 { 698 int i; 699 acpi_status status; 700 701 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 702 name); 703 704 for (i = 0; i < num_paths; i++) { 705 status = acpi_get_handle(parent, paths[i], handle); 706 if (ACPI_SUCCESS(status)) { 707 dbg_printk(TPACPI_DBG_INIT, 708 "Found ACPI handle %s for %s\n", 709 paths[i], name); 710 return; 711 } 712 } 713 714 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 715 name); 716 *handle = NULL; 717 } 718 719 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 720 u32 level, void *context, void **return_value) 721 { 722 struct acpi_device *dev; 723 if (!strcmp(context, "video")) { 724 if (acpi_bus_get_device(handle, &dev)) 725 return AE_OK; 726 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 727 return AE_OK; 728 } 729 730 *(acpi_handle *)return_value = handle; 731 732 return AE_CTRL_TERMINATE; 733 } 734 735 static void __init tpacpi_acpi_handle_locate(const char *name, 736 const char *hid, 737 acpi_handle *handle) 738 { 739 acpi_status status; 740 acpi_handle device_found; 741 742 BUG_ON(!name || !handle); 743 vdbg_printk(TPACPI_DBG_INIT, 744 "trying to locate ACPI handle for %s, using HID %s\n", 745 name, hid ? hid : "NULL"); 746 747 memset(&device_found, 0, sizeof(device_found)); 748 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 749 (void *)name, &device_found); 750 751 *handle = NULL; 752 753 if (ACPI_SUCCESS(status)) { 754 *handle = device_found; 755 dbg_printk(TPACPI_DBG_INIT, 756 "Found ACPI handle for %s\n", name); 757 } else { 758 vdbg_printk(TPACPI_DBG_INIT, 759 "Could not locate an ACPI handle for %s: %s\n", 760 name, acpi_format_exception(status)); 761 } 762 } 763 764 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 765 { 766 struct ibm_struct *ibm = data; 767 768 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 769 return; 770 771 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 772 return; 773 774 ibm->acpi->notify(ibm, event); 775 } 776 777 static int __init setup_acpi_notify(struct ibm_struct *ibm) 778 { 779 acpi_status status; 780 int rc; 781 782 BUG_ON(!ibm->acpi); 783 784 if (!*ibm->acpi->handle) 785 return 0; 786 787 vdbg_printk(TPACPI_DBG_INIT, 788 "setting up ACPI notify for %s\n", ibm->name); 789 790 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 791 if (rc < 0) { 792 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 793 return -ENODEV; 794 } 795 796 ibm->acpi->device->driver_data = ibm; 797 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 798 TPACPI_ACPI_EVENT_PREFIX, 799 ibm->name); 800 801 status = acpi_install_notify_handler(*ibm->acpi->handle, 802 ibm->acpi->type, dispatch_acpi_notify, ibm); 803 if (ACPI_FAILURE(status)) { 804 if (status == AE_ALREADY_EXISTS) { 805 pr_notice("another device driver is already handling %s events\n", 806 ibm->name); 807 } else { 808 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 809 ibm->name, acpi_format_exception(status)); 810 } 811 return -ENODEV; 812 } 813 ibm->flags.acpi_notify_installed = 1; 814 return 0; 815 } 816 817 static int __init tpacpi_device_add(struct acpi_device *device) 818 { 819 return 0; 820 } 821 822 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 823 { 824 int rc; 825 826 dbg_printk(TPACPI_DBG_INIT, 827 "registering %s as an ACPI driver\n", ibm->name); 828 829 BUG_ON(!ibm->acpi); 830 831 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 832 if (!ibm->acpi->driver) { 833 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 834 return -ENOMEM; 835 } 836 837 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 838 ibm->acpi->driver->ids = ibm->acpi->hid; 839 840 ibm->acpi->driver->ops.add = &tpacpi_device_add; 841 842 rc = acpi_bus_register_driver(ibm->acpi->driver); 843 if (rc < 0) { 844 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 845 ibm->name, rc); 846 kfree(ibm->acpi->driver); 847 ibm->acpi->driver = NULL; 848 } else if (!rc) 849 ibm->flags.acpi_driver_registered = 1; 850 851 return rc; 852 } 853 854 855 /**************************************************************************** 856 **************************************************************************** 857 * 858 * Procfs Helpers 859 * 860 **************************************************************************** 861 ****************************************************************************/ 862 863 static int dispatch_proc_show(struct seq_file *m, void *v) 864 { 865 struct ibm_struct *ibm = m->private; 866 867 if (!ibm || !ibm->read) 868 return -EINVAL; 869 return ibm->read(m); 870 } 871 872 static int dispatch_proc_open(struct inode *inode, struct file *file) 873 { 874 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 875 } 876 877 static ssize_t dispatch_proc_write(struct file *file, 878 const char __user *userbuf, 879 size_t count, loff_t *pos) 880 { 881 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 882 char *kernbuf; 883 int ret; 884 885 if (!ibm || !ibm->write) 886 return -EINVAL; 887 if (count > PAGE_SIZE - 2) 888 return -EINVAL; 889 890 kernbuf = kmalloc(count + 2, GFP_KERNEL); 891 if (!kernbuf) 892 return -ENOMEM; 893 894 if (copy_from_user(kernbuf, userbuf, count)) { 895 kfree(kernbuf); 896 return -EFAULT; 897 } 898 899 kernbuf[count] = 0; 900 strcat(kernbuf, ","); 901 ret = ibm->write(kernbuf); 902 if (ret == 0) 903 ret = count; 904 905 kfree(kernbuf); 906 907 return ret; 908 } 909 910 static const struct file_operations dispatch_proc_fops = { 911 .owner = THIS_MODULE, 912 .open = dispatch_proc_open, 913 .read = seq_read, 914 .llseek = seq_lseek, 915 .release = single_release, 916 .write = dispatch_proc_write, 917 }; 918 919 static char *next_cmd(char **cmds) 920 { 921 char *start = *cmds; 922 char *end; 923 924 while ((end = strchr(start, ',')) && end == start) 925 start = end + 1; 926 927 if (!end) 928 return NULL; 929 930 *end = 0; 931 *cmds = end + 1; 932 return start; 933 } 934 935 936 /**************************************************************************** 937 **************************************************************************** 938 * 939 * Device model: input, hwmon and platform 940 * 941 **************************************************************************** 942 ****************************************************************************/ 943 944 static struct platform_device *tpacpi_pdev; 945 static struct platform_device *tpacpi_sensors_pdev; 946 static struct device *tpacpi_hwmon; 947 static struct input_dev *tpacpi_inputdev; 948 static struct mutex tpacpi_inputdev_send_mutex; 949 static LIST_HEAD(tpacpi_all_drivers); 950 951 #ifdef CONFIG_PM_SLEEP 952 static int tpacpi_suspend_handler(struct device *dev) 953 { 954 struct ibm_struct *ibm, *itmp; 955 956 list_for_each_entry_safe(ibm, itmp, 957 &tpacpi_all_drivers, 958 all_drivers) { 959 if (ibm->suspend) 960 (ibm->suspend)(); 961 } 962 963 return 0; 964 } 965 966 static int tpacpi_resume_handler(struct device *dev) 967 { 968 struct ibm_struct *ibm, *itmp; 969 970 list_for_each_entry_safe(ibm, itmp, 971 &tpacpi_all_drivers, 972 all_drivers) { 973 if (ibm->resume) 974 (ibm->resume)(); 975 } 976 977 return 0; 978 } 979 #endif 980 981 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 982 tpacpi_suspend_handler, tpacpi_resume_handler); 983 984 static void tpacpi_shutdown_handler(struct platform_device *pdev) 985 { 986 struct ibm_struct *ibm, *itmp; 987 988 list_for_each_entry_safe(ibm, itmp, 989 &tpacpi_all_drivers, 990 all_drivers) { 991 if (ibm->shutdown) 992 (ibm->shutdown)(); 993 } 994 } 995 996 static struct platform_driver tpacpi_pdriver = { 997 .driver = { 998 .name = TPACPI_DRVR_NAME, 999 .pm = &tpacpi_pm, 1000 }, 1001 .shutdown = tpacpi_shutdown_handler, 1002 }; 1003 1004 static struct platform_driver tpacpi_hwmon_pdriver = { 1005 .driver = { 1006 .name = TPACPI_HWMON_DRVR_NAME, 1007 }, 1008 }; 1009 1010 /************************************************************************* 1011 * sysfs support helpers 1012 */ 1013 1014 struct attribute_set { 1015 unsigned int members, max_members; 1016 struct attribute_group group; 1017 }; 1018 1019 struct attribute_set_obj { 1020 struct attribute_set s; 1021 struct attribute *a; 1022 } __attribute__((packed)); 1023 1024 static struct attribute_set *create_attr_set(unsigned int max_members, 1025 const char *name) 1026 { 1027 struct attribute_set_obj *sobj; 1028 1029 if (max_members == 0) 1030 return NULL; 1031 1032 /* Allocates space for implicit NULL at the end too */ 1033 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1034 max_members * sizeof(struct attribute *), 1035 GFP_KERNEL); 1036 if (!sobj) 1037 return NULL; 1038 sobj->s.max_members = max_members; 1039 sobj->s.group.attrs = &sobj->a; 1040 sobj->s.group.name = name; 1041 1042 return &sobj->s; 1043 } 1044 1045 #define destroy_attr_set(_set) \ 1046 kfree(_set); 1047 1048 /* not multi-threaded safe, use it in a single thread per set */ 1049 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1050 { 1051 if (!s || !attr) 1052 return -EINVAL; 1053 1054 if (s->members >= s->max_members) 1055 return -ENOMEM; 1056 1057 s->group.attrs[s->members] = attr; 1058 s->members++; 1059 1060 return 0; 1061 } 1062 1063 static int add_many_to_attr_set(struct attribute_set *s, 1064 struct attribute **attr, 1065 unsigned int count) 1066 { 1067 int i, res; 1068 1069 for (i = 0; i < count; i++) { 1070 res = add_to_attr_set(s, attr[i]); 1071 if (res) 1072 return res; 1073 } 1074 1075 return 0; 1076 } 1077 1078 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1079 { 1080 sysfs_remove_group(kobj, &s->group); 1081 destroy_attr_set(s); 1082 } 1083 1084 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1085 sysfs_create_group(_kobj, &_attr_set->group) 1086 1087 static int parse_strtoul(const char *buf, 1088 unsigned long max, unsigned long *value) 1089 { 1090 char *endp; 1091 1092 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1093 endp = skip_spaces(endp); 1094 if (*endp || *value > max) 1095 return -EINVAL; 1096 1097 return 0; 1098 } 1099 1100 static void tpacpi_disable_brightness_delay(void) 1101 { 1102 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1103 pr_notice("ACPI backlight control delay disabled\n"); 1104 } 1105 1106 static void printk_deprecated_attribute(const char * const what, 1107 const char * const details) 1108 { 1109 tpacpi_log_usertask("deprecated sysfs attribute"); 1110 pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n", 1111 what, details); 1112 } 1113 1114 /************************************************************************* 1115 * rfkill and radio control support helpers 1116 */ 1117 1118 /* 1119 * ThinkPad-ACPI firmware handling model: 1120 * 1121 * WLSW (master wireless switch) is event-driven, and is common to all 1122 * firmware-controlled radios. It cannot be controlled, just monitored, 1123 * as expected. It overrides all radio state in firmware 1124 * 1125 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1126 * (TODO: verify how WLSW interacts with the returned radio state). 1127 * 1128 * The only time there are shadow radio state changes, is when 1129 * masked-off hotkeys are used. 1130 */ 1131 1132 /* 1133 * Internal driver API for radio state: 1134 * 1135 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1136 * bool: true means radio blocked (off) 1137 */ 1138 enum tpacpi_rfkill_state { 1139 TPACPI_RFK_RADIO_OFF = 0, 1140 TPACPI_RFK_RADIO_ON 1141 }; 1142 1143 /* rfkill switches */ 1144 enum tpacpi_rfk_id { 1145 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1146 TPACPI_RFK_WWAN_SW_ID, 1147 TPACPI_RFK_UWB_SW_ID, 1148 TPACPI_RFK_SW_MAX 1149 }; 1150 1151 static const char *tpacpi_rfkill_names[] = { 1152 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1153 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1154 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1155 [TPACPI_RFK_SW_MAX] = NULL 1156 }; 1157 1158 /* ThinkPad-ACPI rfkill subdriver */ 1159 struct tpacpi_rfk { 1160 struct rfkill *rfkill; 1161 enum tpacpi_rfk_id id; 1162 const struct tpacpi_rfk_ops *ops; 1163 }; 1164 1165 struct tpacpi_rfk_ops { 1166 /* firmware interface */ 1167 int (*get_status)(void); 1168 int (*set_status)(const enum tpacpi_rfkill_state); 1169 }; 1170 1171 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1172 1173 /* Query FW and update rfkill sw state for a given rfkill switch */ 1174 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1175 { 1176 int status; 1177 1178 if (!tp_rfk) 1179 return -ENODEV; 1180 1181 status = (tp_rfk->ops->get_status)(); 1182 if (status < 0) 1183 return status; 1184 1185 rfkill_set_sw_state(tp_rfk->rfkill, 1186 (status == TPACPI_RFK_RADIO_OFF)); 1187 1188 return status; 1189 } 1190 1191 /* Query FW and update rfkill sw state for all rfkill switches */ 1192 static void tpacpi_rfk_update_swstate_all(void) 1193 { 1194 unsigned int i; 1195 1196 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1197 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1198 } 1199 1200 /* 1201 * Sync the HW-blocking state of all rfkill switches, 1202 * do notice it causes the rfkill core to schedule uevents 1203 */ 1204 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1205 { 1206 unsigned int i; 1207 struct tpacpi_rfk *tp_rfk; 1208 1209 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1210 tp_rfk = tpacpi_rfkill_switches[i]; 1211 if (tp_rfk) { 1212 if (rfkill_set_hw_state(tp_rfk->rfkill, 1213 blocked)) { 1214 /* ignore -- we track sw block */ 1215 } 1216 } 1217 } 1218 } 1219 1220 /* Call to get the WLSW state from the firmware */ 1221 static int hotkey_get_wlsw(void); 1222 1223 /* Call to query WLSW state and update all rfkill switches */ 1224 static bool tpacpi_rfk_check_hwblock_state(void) 1225 { 1226 int res = hotkey_get_wlsw(); 1227 int hw_blocked; 1228 1229 /* When unknown or unsupported, we have to assume it is unblocked */ 1230 if (res < 0) 1231 return false; 1232 1233 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1234 tpacpi_rfk_update_hwblock_state(hw_blocked); 1235 1236 return hw_blocked; 1237 } 1238 1239 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1240 { 1241 struct tpacpi_rfk *tp_rfk = data; 1242 int res; 1243 1244 dbg_printk(TPACPI_DBG_RFKILL, 1245 "request to change radio state to %s\n", 1246 blocked ? "blocked" : "unblocked"); 1247 1248 /* try to set radio state */ 1249 res = (tp_rfk->ops->set_status)(blocked ? 1250 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1251 1252 /* and update the rfkill core with whatever the FW really did */ 1253 tpacpi_rfk_update_swstate(tp_rfk); 1254 1255 return (res < 0) ? res : 0; 1256 } 1257 1258 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1259 .set_block = tpacpi_rfk_hook_set_block, 1260 }; 1261 1262 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1263 const struct tpacpi_rfk_ops *tp_rfkops, 1264 const enum rfkill_type rfktype, 1265 const char *name, 1266 const bool set_default) 1267 { 1268 struct tpacpi_rfk *atp_rfk; 1269 int res; 1270 bool sw_state = false; 1271 bool hw_state; 1272 int sw_status; 1273 1274 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1275 1276 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1277 if (atp_rfk) 1278 atp_rfk->rfkill = rfkill_alloc(name, 1279 &tpacpi_pdev->dev, 1280 rfktype, 1281 &tpacpi_rfk_rfkill_ops, 1282 atp_rfk); 1283 if (!atp_rfk || !atp_rfk->rfkill) { 1284 pr_err("failed to allocate memory for rfkill class\n"); 1285 kfree(atp_rfk); 1286 return -ENOMEM; 1287 } 1288 1289 atp_rfk->id = id; 1290 atp_rfk->ops = tp_rfkops; 1291 1292 sw_status = (tp_rfkops->get_status)(); 1293 if (sw_status < 0) { 1294 pr_err("failed to read initial state for %s, error %d\n", 1295 name, sw_status); 1296 } else { 1297 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1298 if (set_default) { 1299 /* try to keep the initial state, since we ask the 1300 * firmware to preserve it across S5 in NVRAM */ 1301 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1302 } 1303 } 1304 hw_state = tpacpi_rfk_check_hwblock_state(); 1305 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1306 1307 res = rfkill_register(atp_rfk->rfkill); 1308 if (res < 0) { 1309 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1310 rfkill_destroy(atp_rfk->rfkill); 1311 kfree(atp_rfk); 1312 return res; 1313 } 1314 1315 tpacpi_rfkill_switches[id] = atp_rfk; 1316 1317 pr_info("rfkill switch %s: radio is %sblocked\n", 1318 name, (sw_state || hw_state) ? "" : "un"); 1319 return 0; 1320 } 1321 1322 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1323 { 1324 struct tpacpi_rfk *tp_rfk; 1325 1326 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1327 1328 tp_rfk = tpacpi_rfkill_switches[id]; 1329 if (tp_rfk) { 1330 rfkill_unregister(tp_rfk->rfkill); 1331 rfkill_destroy(tp_rfk->rfkill); 1332 tpacpi_rfkill_switches[id] = NULL; 1333 kfree(tp_rfk); 1334 } 1335 } 1336 1337 static void printk_deprecated_rfkill_attribute(const char * const what) 1338 { 1339 printk_deprecated_attribute(what, 1340 "Please switch to generic rfkill before year 2010"); 1341 } 1342 1343 /* sysfs <radio> enable ------------------------------------------------ */ 1344 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1345 struct device_attribute *attr, 1346 char *buf) 1347 { 1348 int status; 1349 1350 printk_deprecated_rfkill_attribute(attr->attr.name); 1351 1352 /* This is in the ABI... */ 1353 if (tpacpi_rfk_check_hwblock_state()) { 1354 status = TPACPI_RFK_RADIO_OFF; 1355 } else { 1356 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1357 if (status < 0) 1358 return status; 1359 } 1360 1361 return snprintf(buf, PAGE_SIZE, "%d\n", 1362 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1363 } 1364 1365 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1366 struct device_attribute *attr, 1367 const char *buf, size_t count) 1368 { 1369 unsigned long t; 1370 int res; 1371 1372 printk_deprecated_rfkill_attribute(attr->attr.name); 1373 1374 if (parse_strtoul(buf, 1, &t)) 1375 return -EINVAL; 1376 1377 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1378 1379 /* This is in the ABI... */ 1380 if (tpacpi_rfk_check_hwblock_state() && !!t) 1381 return -EPERM; 1382 1383 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1384 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1385 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1386 1387 return (res < 0) ? res : count; 1388 } 1389 1390 /* procfs -------------------------------------------------------------- */ 1391 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1392 { 1393 if (id >= TPACPI_RFK_SW_MAX) 1394 seq_printf(m, "status:\t\tnot supported\n"); 1395 else { 1396 int status; 1397 1398 /* This is in the ABI... */ 1399 if (tpacpi_rfk_check_hwblock_state()) { 1400 status = TPACPI_RFK_RADIO_OFF; 1401 } else { 1402 status = tpacpi_rfk_update_swstate( 1403 tpacpi_rfkill_switches[id]); 1404 if (status < 0) 1405 return status; 1406 } 1407 1408 seq_printf(m, "status:\t\t%s\n", 1409 (status == TPACPI_RFK_RADIO_ON) ? 1410 "enabled" : "disabled"); 1411 seq_printf(m, "commands:\tenable, disable\n"); 1412 } 1413 1414 return 0; 1415 } 1416 1417 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1418 { 1419 char *cmd; 1420 int status = -1; 1421 int res = 0; 1422 1423 if (id >= TPACPI_RFK_SW_MAX) 1424 return -ENODEV; 1425 1426 while ((cmd = next_cmd(&buf))) { 1427 if (strlencmp(cmd, "enable") == 0) 1428 status = TPACPI_RFK_RADIO_ON; 1429 else if (strlencmp(cmd, "disable") == 0) 1430 status = TPACPI_RFK_RADIO_OFF; 1431 else 1432 return -EINVAL; 1433 } 1434 1435 if (status != -1) { 1436 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1437 (status == TPACPI_RFK_RADIO_ON) ? 1438 "enable" : "disable", 1439 tpacpi_rfkill_names[id]); 1440 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1441 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1442 } 1443 1444 return res; 1445 } 1446 1447 /************************************************************************* 1448 * thinkpad-acpi driver attributes 1449 */ 1450 1451 /* interface_version --------------------------------------------------- */ 1452 static ssize_t interface_version_show(struct device_driver *drv, char *buf) 1453 { 1454 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1455 } 1456 static DRIVER_ATTR_RO(interface_version); 1457 1458 /* debug_level --------------------------------------------------------- */ 1459 static ssize_t debug_level_show(struct device_driver *drv, char *buf) 1460 { 1461 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1462 } 1463 1464 static ssize_t debug_level_store(struct device_driver *drv, const char *buf, 1465 size_t count) 1466 { 1467 unsigned long t; 1468 1469 if (parse_strtoul(buf, 0xffff, &t)) 1470 return -EINVAL; 1471 1472 dbg_level = t; 1473 1474 return count; 1475 } 1476 static DRIVER_ATTR_RW(debug_level); 1477 1478 /* version ------------------------------------------------------------- */ 1479 static ssize_t version_show(struct device_driver *drv, char *buf) 1480 { 1481 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1482 TPACPI_DESC, TPACPI_VERSION); 1483 } 1484 static DRIVER_ATTR_RO(version); 1485 1486 /* --------------------------------------------------------------------- */ 1487 1488 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1489 1490 /* wlsw_emulstate ------------------------------------------------------ */ 1491 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf) 1492 { 1493 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1494 } 1495 1496 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf, 1497 size_t count) 1498 { 1499 unsigned long t; 1500 1501 if (parse_strtoul(buf, 1, &t)) 1502 return -EINVAL; 1503 1504 if (tpacpi_wlsw_emulstate != !!t) { 1505 tpacpi_wlsw_emulstate = !!t; 1506 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1507 } 1508 1509 return count; 1510 } 1511 static DRIVER_ATTR_RW(wlsw_emulstate); 1512 1513 /* bluetooth_emulstate ------------------------------------------------- */ 1514 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf) 1515 { 1516 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1517 } 1518 1519 static ssize_t bluetooth_emulstate_store(struct device_driver *drv, 1520 const char *buf, size_t count) 1521 { 1522 unsigned long t; 1523 1524 if (parse_strtoul(buf, 1, &t)) 1525 return -EINVAL; 1526 1527 tpacpi_bluetooth_emulstate = !!t; 1528 1529 return count; 1530 } 1531 static DRIVER_ATTR_RW(bluetooth_emulstate); 1532 1533 /* wwan_emulstate ------------------------------------------------- */ 1534 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf) 1535 { 1536 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1537 } 1538 1539 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf, 1540 size_t count) 1541 { 1542 unsigned long t; 1543 1544 if (parse_strtoul(buf, 1, &t)) 1545 return -EINVAL; 1546 1547 tpacpi_wwan_emulstate = !!t; 1548 1549 return count; 1550 } 1551 static DRIVER_ATTR_RW(wwan_emulstate); 1552 1553 /* uwb_emulstate ------------------------------------------------- */ 1554 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf) 1555 { 1556 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1557 } 1558 1559 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf, 1560 size_t count) 1561 { 1562 unsigned long t; 1563 1564 if (parse_strtoul(buf, 1, &t)) 1565 return -EINVAL; 1566 1567 tpacpi_uwb_emulstate = !!t; 1568 1569 return count; 1570 } 1571 static DRIVER_ATTR_RW(uwb_emulstate); 1572 #endif 1573 1574 /* --------------------------------------------------------------------- */ 1575 1576 static struct driver_attribute *tpacpi_driver_attributes[] = { 1577 &driver_attr_debug_level, &driver_attr_version, 1578 &driver_attr_interface_version, 1579 }; 1580 1581 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1582 { 1583 int i, res; 1584 1585 i = 0; 1586 res = 0; 1587 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1588 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1589 i++; 1590 } 1591 1592 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1593 if (!res && dbg_wlswemul) 1594 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1595 if (!res && dbg_bluetoothemul) 1596 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1597 if (!res && dbg_wwanemul) 1598 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1599 if (!res && dbg_uwbemul) 1600 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1601 #endif 1602 1603 return res; 1604 } 1605 1606 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1607 { 1608 int i; 1609 1610 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1611 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1612 1613 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1614 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1615 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1616 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1617 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1618 #endif 1619 } 1620 1621 /************************************************************************* 1622 * Firmware Data 1623 */ 1624 1625 /* 1626 * Table of recommended minimum BIOS versions 1627 * 1628 * Reasons for listing: 1629 * 1. Stable BIOS, listed because the unknown amount of 1630 * bugs and bad ACPI behaviour on older versions 1631 * 1632 * 2. BIOS or EC fw with known bugs that trigger on Linux 1633 * 1634 * 3. BIOS with known reduced functionality in older versions 1635 * 1636 * We recommend the latest BIOS and EC version. 1637 * We only support the latest BIOS and EC fw version as a rule. 1638 * 1639 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1640 * Information from users in ThinkWiki 1641 * 1642 * WARNING: we use this table also to detect that the machine is 1643 * a ThinkPad in some cases, so don't remove entries lightly. 1644 */ 1645 1646 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1647 { .vendor = (__v), \ 1648 .bios = TPID(__id1, __id2), \ 1649 .ec = TPACPI_MATCH_ANY, \ 1650 .quirks = TPACPI_MATCH_ANY_VERSION << 16 \ 1651 | TPVER(__bv1, __bv2) } 1652 1653 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1654 __eid, __ev1, __ev2) \ 1655 { .vendor = (__v), \ 1656 .bios = TPID(__bid1, __bid2), \ 1657 .ec = __eid, \ 1658 .quirks = TPVER(__ev1, __ev2) << 16 \ 1659 | TPVER(__bv1, __bv2) } 1660 1661 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1662 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1663 1664 /* Outdated IBM BIOSes often lack the EC id string */ 1665 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1666 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1667 __bv1, __bv2, TPID(__id1, __id2), \ 1668 __ev1, __ev2), \ 1669 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1670 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1671 __ev1, __ev2) 1672 1673 /* Outdated IBM BIOSes often lack the EC id string */ 1674 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1675 __eid1, __eid2, __ev1, __ev2) \ 1676 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1677 __bv1, __bv2, TPID(__eid1, __eid2), \ 1678 __ev1, __ev2), \ 1679 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1680 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1681 __ev1, __ev2) 1682 1683 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1684 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1685 1686 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1687 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1688 __bv1, __bv2, TPID(__id1, __id2), \ 1689 __ev1, __ev2) 1690 1691 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1692 __eid1, __eid2, __ev1, __ev2) \ 1693 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1694 __bv1, __bv2, TPID(__eid1, __eid2), \ 1695 __ev1, __ev2) 1696 1697 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1698 /* Numeric models ------------------ */ 1699 /* FW MODEL BIOS VERS */ 1700 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1701 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1702 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1703 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1704 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1705 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1706 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1707 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1708 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1709 1710 /* A-series ------------------------- */ 1711 /* FW MODEL BIOS VERS EC VERS */ 1712 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1713 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1714 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1715 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1716 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1717 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1718 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1719 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1720 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1721 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1722 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1723 1724 /* G-series ------------------------- */ 1725 /* FW MODEL BIOS VERS */ 1726 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1727 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1728 1729 /* R-series, T-series --------------- */ 1730 /* FW MODEL BIOS VERS EC VERS */ 1731 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1732 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1733 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1734 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1735 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1736 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1737 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1738 T40/p, T41/p, T42/p (1) */ 1739 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1740 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1741 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1742 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1743 1744 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1745 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1746 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1747 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1748 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1749 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1750 1751 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1752 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1753 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1754 1755 /* BIOS FW BIOS VERS EC FW EC VERS */ 1756 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1757 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1758 1759 /* X-series ------------------------- */ 1760 /* FW MODEL BIOS VERS EC VERS */ 1761 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1762 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1763 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1764 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1765 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1766 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1767 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1768 1769 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1770 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1771 1772 /* (0) - older versions lack DMI EC fw string and functionality */ 1773 /* (1) - older versions known to lack functionality */ 1774 }; 1775 1776 #undef TPV_QL1 1777 #undef TPV_QL0 1778 #undef TPV_QI2 1779 #undef TPV_QI1 1780 #undef TPV_QI0 1781 #undef TPV_Q_X 1782 #undef TPV_Q 1783 1784 static void __init tpacpi_check_outdated_fw(void) 1785 { 1786 unsigned long fwvers; 1787 u16 ec_version, bios_version; 1788 1789 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1790 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1791 1792 if (!fwvers) 1793 return; 1794 1795 bios_version = fwvers & 0xffffU; 1796 ec_version = (fwvers >> 16) & 0xffffU; 1797 1798 /* note that unknown versions are set to 0x0000 and we use that */ 1799 if ((bios_version > thinkpad_id.bios_release) || 1800 (ec_version > thinkpad_id.ec_release && 1801 ec_version != TPACPI_MATCH_ANY_VERSION)) { 1802 /* 1803 * The changelogs would let us track down the exact 1804 * reason, but it is just too much of a pain to track 1805 * it. We only list BIOSes that are either really 1806 * broken, or really stable to begin with, so it is 1807 * best if the user upgrades the firmware anyway. 1808 */ 1809 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1810 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n"); 1811 } 1812 } 1813 1814 static bool __init tpacpi_is_fw_known(void) 1815 { 1816 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1817 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1818 } 1819 1820 /**************************************************************************** 1821 **************************************************************************** 1822 * 1823 * Subdrivers 1824 * 1825 **************************************************************************** 1826 ****************************************************************************/ 1827 1828 /************************************************************************* 1829 * thinkpad-acpi metadata subdriver 1830 */ 1831 1832 static int thinkpad_acpi_driver_read(struct seq_file *m) 1833 { 1834 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1835 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1836 return 0; 1837 } 1838 1839 static struct ibm_struct thinkpad_acpi_driver_data = { 1840 .name = "driver", 1841 .read = thinkpad_acpi_driver_read, 1842 }; 1843 1844 /************************************************************************* 1845 * Hotkey subdriver 1846 */ 1847 1848 /* 1849 * ThinkPad firmware event model 1850 * 1851 * The ThinkPad firmware has two main event interfaces: normal ACPI 1852 * notifications (which follow the ACPI standard), and a private event 1853 * interface. 1854 * 1855 * The private event interface also issues events for the hotkeys. As 1856 * the driver gained features, the event handling code ended up being 1857 * built around the hotkey subdriver. This will need to be refactored 1858 * to a more formal event API eventually. 1859 * 1860 * Some "hotkeys" are actually supposed to be used as event reports, 1861 * such as "brightness has changed", "volume has changed", depending on 1862 * the ThinkPad model and how the firmware is operating. 1863 * 1864 * Unlike other classes, hotkey-class events have mask/unmask control on 1865 * non-ancient firmware. However, how it behaves changes a lot with the 1866 * firmware model and version. 1867 */ 1868 1869 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1870 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1871 TP_ACPI_HOTKEYSCAN_FNF2, 1872 TP_ACPI_HOTKEYSCAN_FNF3, 1873 TP_ACPI_HOTKEYSCAN_FNF4, 1874 TP_ACPI_HOTKEYSCAN_FNF5, 1875 TP_ACPI_HOTKEYSCAN_FNF6, 1876 TP_ACPI_HOTKEYSCAN_FNF7, 1877 TP_ACPI_HOTKEYSCAN_FNF8, 1878 TP_ACPI_HOTKEYSCAN_FNF9, 1879 TP_ACPI_HOTKEYSCAN_FNF10, 1880 TP_ACPI_HOTKEYSCAN_FNF11, 1881 TP_ACPI_HOTKEYSCAN_FNF12, 1882 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1883 TP_ACPI_HOTKEYSCAN_FNINSERT, 1884 TP_ACPI_HOTKEYSCAN_FNDELETE, 1885 TP_ACPI_HOTKEYSCAN_FNHOME, 1886 TP_ACPI_HOTKEYSCAN_FNEND, 1887 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1888 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1889 TP_ACPI_HOTKEYSCAN_FNSPACE, 1890 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1891 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1892 TP_ACPI_HOTKEYSCAN_MUTE, 1893 TP_ACPI_HOTKEYSCAN_THINKPAD, 1894 TP_ACPI_HOTKEYSCAN_UNK1, 1895 TP_ACPI_HOTKEYSCAN_UNK2, 1896 TP_ACPI_HOTKEYSCAN_UNK3, 1897 TP_ACPI_HOTKEYSCAN_UNK4, 1898 TP_ACPI_HOTKEYSCAN_UNK5, 1899 TP_ACPI_HOTKEYSCAN_UNK6, 1900 TP_ACPI_HOTKEYSCAN_UNK7, 1901 TP_ACPI_HOTKEYSCAN_UNK8, 1902 1903 /* Adaptive keyboard keycodes */ 1904 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1905 TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1906 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1907 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1908 TP_ACPI_HOTKEYSCAN_CLOUD, 1909 TP_ACPI_HOTKEYSCAN_UNK9, 1910 TP_ACPI_HOTKEYSCAN_VOICE, 1911 TP_ACPI_HOTKEYSCAN_UNK10, 1912 TP_ACPI_HOTKEYSCAN_GESTURES, 1913 TP_ACPI_HOTKEYSCAN_UNK11, 1914 TP_ACPI_HOTKEYSCAN_UNK12, 1915 TP_ACPI_HOTKEYSCAN_UNK13, 1916 TP_ACPI_HOTKEYSCAN_CONFIG, 1917 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1918 TP_ACPI_HOTKEYSCAN_RELOAD, 1919 TP_ACPI_HOTKEYSCAN_BACK, 1920 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1921 TP_ACPI_HOTKEYSCAN_MIC_UP, 1922 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1923 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1924 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1925 1926 /* Lenovo extended keymap, starting at 0x1300 */ 1927 TP_ACPI_HOTKEYSCAN_EXTENDED_START, 1928 /* first new observed key (star, favorites) is 0x1311 */ 1929 TP_ACPI_HOTKEYSCAN_STAR = 69, 1930 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2, 1931 TP_ACPI_HOTKEYSCAN_CALCULATOR, 1932 TP_ACPI_HOTKEYSCAN_BLUETOOTH, 1933 TP_ACPI_HOTKEYSCAN_KEYBOARD, 1934 1935 /* Hotkey keymap size */ 1936 TPACPI_HOTKEY_MAP_LEN 1937 }; 1938 1939 enum { /* Keys/events available through NVRAM polling */ 1940 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1941 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1942 }; 1943 1944 enum { /* Positions of some of the keys in hotkey masks */ 1945 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1946 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1947 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1948 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1949 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1950 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1951 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1952 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1953 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1954 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1955 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1956 }; 1957 1958 enum { /* NVRAM to ACPI HKEY group map */ 1959 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1960 TP_ACPI_HKEY_ZOOM_MASK | 1961 TP_ACPI_HKEY_DISPSWTCH_MASK | 1962 TP_ACPI_HKEY_HIBERNATE_MASK, 1963 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1964 TP_ACPI_HKEY_BRGHTDWN_MASK, 1965 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1966 TP_ACPI_HKEY_VOLDWN_MASK | 1967 TP_ACPI_HKEY_MUTE_MASK, 1968 }; 1969 1970 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1971 struct tp_nvram_state { 1972 u16 thinkpad_toggle:1; 1973 u16 zoom_toggle:1; 1974 u16 display_toggle:1; 1975 u16 thinklight_toggle:1; 1976 u16 hibernate_toggle:1; 1977 u16 displayexp_toggle:1; 1978 u16 display_state:1; 1979 u16 brightness_toggle:1; 1980 u16 volume_toggle:1; 1981 u16 mute:1; 1982 1983 u8 brightness_level; 1984 u8 volume_level; 1985 }; 1986 1987 /* kthread for the hotkey poller */ 1988 static struct task_struct *tpacpi_hotkey_task; 1989 1990 /* 1991 * Acquire mutex to write poller control variables as an 1992 * atomic block. 1993 * 1994 * Increment hotkey_config_change when changing them if you 1995 * want the kthread to forget old state. 1996 * 1997 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1998 */ 1999 static struct mutex hotkey_thread_data_mutex; 2000 static unsigned int hotkey_config_change; 2001 2002 /* 2003 * hotkey poller control variables 2004 * 2005 * Must be atomic or readers will also need to acquire mutex 2006 * 2007 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2008 * should be used only when the changes need to be taken as 2009 * a block, OR when one needs to force the kthread to forget 2010 * old state. 2011 */ 2012 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2013 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2014 2015 #define HOTKEY_CONFIG_CRITICAL_START \ 2016 do { \ 2017 mutex_lock(&hotkey_thread_data_mutex); \ 2018 hotkey_config_change++; \ 2019 } while (0); 2020 #define HOTKEY_CONFIG_CRITICAL_END \ 2021 mutex_unlock(&hotkey_thread_data_mutex); 2022 2023 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2024 2025 #define hotkey_source_mask 0U 2026 #define HOTKEY_CONFIG_CRITICAL_START 2027 #define HOTKEY_CONFIG_CRITICAL_END 2028 2029 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2030 2031 static struct mutex hotkey_mutex; 2032 2033 static enum { /* Reasons for waking up */ 2034 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2035 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2036 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2037 } hotkey_wakeup_reason; 2038 2039 static int hotkey_autosleep_ack; 2040 2041 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2042 static u32 hotkey_all_mask; /* all events supported in fw */ 2043 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */ 2044 static u32 hotkey_reserved_mask; /* events better left disabled */ 2045 static u32 hotkey_driver_mask; /* events needed by the driver */ 2046 static u32 hotkey_user_mask; /* events visible to userspace */ 2047 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2048 2049 static u16 *hotkey_keycode_map; 2050 2051 static struct attribute_set *hotkey_dev_attributes; 2052 2053 static void tpacpi_driver_event(const unsigned int hkey_event); 2054 static void hotkey_driver_event(const unsigned int scancode); 2055 static void hotkey_poll_setup(const bool may_warn); 2056 2057 /* HKEY.MHKG() return bits */ 2058 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2059 enum { 2060 TP_ACPI_MULTI_MODE_INVALID = 0, 2061 TP_ACPI_MULTI_MODE_UNKNOWN = 1 << 0, 2062 TP_ACPI_MULTI_MODE_LAPTOP = 1 << 1, 2063 TP_ACPI_MULTI_MODE_TABLET = 1 << 2, 2064 TP_ACPI_MULTI_MODE_FLAT = 1 << 3, 2065 TP_ACPI_MULTI_MODE_STAND = 1 << 4, 2066 TP_ACPI_MULTI_MODE_TENT = 1 << 5, 2067 TP_ACPI_MULTI_MODE_STAND_TENT = 1 << 6, 2068 }; 2069 2070 enum { 2071 /* The following modes are considered tablet mode for the purpose of 2072 * reporting the status to userspace. i.e. in all these modes it makes 2073 * sense to disable the laptop input devices such as touchpad and 2074 * keyboard. 2075 */ 2076 TP_ACPI_MULTI_MODE_TABLET_LIKE = TP_ACPI_MULTI_MODE_TABLET | 2077 TP_ACPI_MULTI_MODE_STAND | 2078 TP_ACPI_MULTI_MODE_TENT | 2079 TP_ACPI_MULTI_MODE_STAND_TENT, 2080 }; 2081 2082 static int hotkey_get_wlsw(void) 2083 { 2084 int status; 2085 2086 if (!tp_features.hotkey_wlsw) 2087 return -ENODEV; 2088 2089 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2090 if (dbg_wlswemul) 2091 return (tpacpi_wlsw_emulstate) ? 2092 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2093 #endif 2094 2095 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2096 return -EIO; 2097 2098 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2099 } 2100 2101 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode) 2102 { 2103 int type = (s >> 16) & 0xffff; 2104 int value = s & 0xffff; 2105 int mode = TP_ACPI_MULTI_MODE_INVALID; 2106 int valid_modes = 0; 2107 2108 if (has_tablet_mode) 2109 *has_tablet_mode = 0; 2110 2111 switch (type) { 2112 case 1: 2113 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2114 TP_ACPI_MULTI_MODE_TABLET | 2115 TP_ACPI_MULTI_MODE_STAND_TENT; 2116 break; 2117 case 2: 2118 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2119 TP_ACPI_MULTI_MODE_FLAT | 2120 TP_ACPI_MULTI_MODE_TABLET | 2121 TP_ACPI_MULTI_MODE_STAND | 2122 TP_ACPI_MULTI_MODE_TENT; 2123 break; 2124 case 3: 2125 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2126 TP_ACPI_MULTI_MODE_FLAT; 2127 break; 2128 case 4: 2129 case 5: 2130 /* In mode 4, FLAT is not specified as a valid mode. However, 2131 * it can be seen at least on the X1 Yoga 2nd Generation. 2132 */ 2133 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2134 TP_ACPI_MULTI_MODE_FLAT | 2135 TP_ACPI_MULTI_MODE_TABLET | 2136 TP_ACPI_MULTI_MODE_STAND | 2137 TP_ACPI_MULTI_MODE_TENT; 2138 break; 2139 default: 2140 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n", 2141 type, value, TPACPI_MAIL); 2142 return 0; 2143 } 2144 2145 if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE)) 2146 *has_tablet_mode = 1; 2147 2148 switch (value) { 2149 case 1: 2150 mode = TP_ACPI_MULTI_MODE_LAPTOP; 2151 break; 2152 case 2: 2153 mode = TP_ACPI_MULTI_MODE_FLAT; 2154 break; 2155 case 3: 2156 mode = TP_ACPI_MULTI_MODE_TABLET; 2157 break; 2158 case 4: 2159 if (type == 1) 2160 mode = TP_ACPI_MULTI_MODE_STAND_TENT; 2161 else 2162 mode = TP_ACPI_MULTI_MODE_STAND; 2163 break; 2164 case 5: 2165 mode = TP_ACPI_MULTI_MODE_TENT; 2166 break; 2167 default: 2168 if (type == 5 && value == 0xffff) { 2169 pr_warn("Multi mode status is undetected, assuming laptop\n"); 2170 return 0; 2171 } 2172 } 2173 2174 if (!(mode & valid_modes)) { 2175 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n", 2176 value, type, TPACPI_MAIL); 2177 return 0; 2178 } 2179 2180 return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE); 2181 } 2182 2183 static int hotkey_get_tablet_mode(int *status) 2184 { 2185 int s; 2186 2187 switch (tp_features.hotkey_tablet) { 2188 case TP_HOTKEY_TABLET_USES_MHKG: 2189 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2190 return -EIO; 2191 2192 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2193 break; 2194 case TP_HOTKEY_TABLET_USES_GMMS: 2195 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0)) 2196 return -EIO; 2197 2198 *status = hotkey_gmms_get_tablet_mode(s, NULL); 2199 break; 2200 default: 2201 break; 2202 } 2203 2204 return 0; 2205 } 2206 2207 /* 2208 * Reads current event mask from firmware, and updates 2209 * hotkey_acpi_mask accordingly. Also resets any bits 2210 * from hotkey_user_mask that are unavailable to be 2211 * delivered (shadow requirement of the userspace ABI). 2212 * 2213 * Call with hotkey_mutex held 2214 */ 2215 static int hotkey_mask_get(void) 2216 { 2217 if (tp_features.hotkey_mask) { 2218 u32 m = 0; 2219 2220 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2221 return -EIO; 2222 2223 hotkey_acpi_mask = m; 2224 } else { 2225 /* no mask support doesn't mean no event support... */ 2226 hotkey_acpi_mask = hotkey_all_mask; 2227 } 2228 2229 /* sync userspace-visible mask */ 2230 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2231 2232 return 0; 2233 } 2234 2235 static void hotkey_mask_warn_incomplete_mask(void) 2236 { 2237 /* log only what the user can fix... */ 2238 const u32 wantedmask = hotkey_driver_mask & 2239 ~(hotkey_acpi_mask | hotkey_source_mask) & 2240 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2241 2242 if (wantedmask) 2243 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2244 } 2245 2246 /* 2247 * Set the firmware mask when supported 2248 * 2249 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2250 * 2251 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2252 * 2253 * Call with hotkey_mutex held 2254 */ 2255 static int hotkey_mask_set(u32 mask) 2256 { 2257 int i; 2258 int rc = 0; 2259 2260 const u32 fwmask = mask & ~hotkey_source_mask; 2261 2262 if (tp_features.hotkey_mask) { 2263 for (i = 0; i < 32; i++) { 2264 if (!acpi_evalf(hkey_handle, 2265 NULL, "MHKM", "vdd", i + 1, 2266 !!(mask & (1 << i)))) { 2267 rc = -EIO; 2268 break; 2269 } 2270 } 2271 } 2272 2273 /* 2274 * We *must* make an inconditional call to hotkey_mask_get to 2275 * refresh hotkey_acpi_mask and update hotkey_user_mask 2276 * 2277 * Take the opportunity to also log when we cannot _enable_ 2278 * a given event. 2279 */ 2280 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2281 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n", 2282 fwmask, hotkey_acpi_mask); 2283 } 2284 2285 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2286 hotkey_mask_warn_incomplete_mask(); 2287 2288 return rc; 2289 } 2290 2291 /* 2292 * Sets hotkey_user_mask and tries to set the firmware mask 2293 * 2294 * Call with hotkey_mutex held 2295 */ 2296 static int hotkey_user_mask_set(const u32 mask) 2297 { 2298 int rc; 2299 2300 /* Give people a chance to notice they are doing something that 2301 * is bound to go boom on their users sooner or later */ 2302 if (!tp_warned.hotkey_mask_ff && 2303 (mask == 0xffff || mask == 0xffffff || 2304 mask == 0xffffffff)) { 2305 tp_warned.hotkey_mask_ff = 1; 2306 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n", 2307 mask); 2308 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n"); 2309 } 2310 2311 /* Try to enable what the user asked for, plus whatever we need. 2312 * this syncs everything but won't enable bits in hotkey_user_mask */ 2313 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2314 2315 /* Enable the available bits in hotkey_user_mask */ 2316 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2317 2318 return rc; 2319 } 2320 2321 /* 2322 * Sets the driver hotkey mask. 2323 * 2324 * Can be called even if the hotkey subdriver is inactive 2325 */ 2326 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2327 { 2328 int rc; 2329 2330 /* Do the right thing if hotkey_init has not been called yet */ 2331 if (!tp_features.hotkey) { 2332 hotkey_driver_mask = mask; 2333 return 0; 2334 } 2335 2336 mutex_lock(&hotkey_mutex); 2337 2338 HOTKEY_CONFIG_CRITICAL_START 2339 hotkey_driver_mask = mask; 2340 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2341 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2342 #endif 2343 HOTKEY_CONFIG_CRITICAL_END 2344 2345 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2346 ~hotkey_source_mask); 2347 hotkey_poll_setup(true); 2348 2349 mutex_unlock(&hotkey_mutex); 2350 2351 return rc; 2352 } 2353 2354 static int hotkey_status_get(int *status) 2355 { 2356 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2357 return -EIO; 2358 2359 return 0; 2360 } 2361 2362 static int hotkey_status_set(bool enable) 2363 { 2364 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2365 return -EIO; 2366 2367 return 0; 2368 } 2369 2370 static void tpacpi_input_send_tabletsw(void) 2371 { 2372 int state; 2373 2374 if (tp_features.hotkey_tablet && 2375 !hotkey_get_tablet_mode(&state)) { 2376 mutex_lock(&tpacpi_inputdev_send_mutex); 2377 2378 input_report_switch(tpacpi_inputdev, 2379 SW_TABLET_MODE, !!state); 2380 input_sync(tpacpi_inputdev); 2381 2382 mutex_unlock(&tpacpi_inputdev_send_mutex); 2383 } 2384 } 2385 2386 /* Do NOT call without validating scancode first */ 2387 static void tpacpi_input_send_key(const unsigned int scancode) 2388 { 2389 const unsigned int keycode = hotkey_keycode_map[scancode]; 2390 2391 if (keycode != KEY_RESERVED) { 2392 mutex_lock(&tpacpi_inputdev_send_mutex); 2393 2394 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2395 input_report_key(tpacpi_inputdev, keycode, 1); 2396 input_sync(tpacpi_inputdev); 2397 2398 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2399 input_report_key(tpacpi_inputdev, keycode, 0); 2400 input_sync(tpacpi_inputdev); 2401 2402 mutex_unlock(&tpacpi_inputdev_send_mutex); 2403 } 2404 } 2405 2406 /* Do NOT call without validating scancode first */ 2407 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2408 { 2409 hotkey_driver_event(scancode); 2410 if (hotkey_user_mask & (1 << scancode)) 2411 tpacpi_input_send_key(scancode); 2412 } 2413 2414 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2415 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2416 2417 /* Do NOT call without validating scancode first */ 2418 static void tpacpi_hotkey_send_key(unsigned int scancode) 2419 { 2420 tpacpi_input_send_key_masked(scancode); 2421 } 2422 2423 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2424 { 2425 u8 d; 2426 2427 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2428 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2429 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2430 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2431 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2432 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2433 } 2434 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) { 2435 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2436 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2437 } 2438 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2439 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2440 n->displayexp_toggle = 2441 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2442 } 2443 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2444 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2445 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2446 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2447 n->brightness_toggle = 2448 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2449 } 2450 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2451 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2452 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2453 >> TP_NVRAM_POS_LEVEL_VOLUME; 2454 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2455 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2456 } 2457 } 2458 2459 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2460 do { \ 2461 if ((event_mask & (1 << __scancode)) && \ 2462 oldn->__member != newn->__member) \ 2463 tpacpi_hotkey_send_key(__scancode); \ 2464 } while (0) 2465 2466 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2467 do { \ 2468 if (event_mask & (1 << __scancode)) \ 2469 tpacpi_hotkey_send_key(__scancode); \ 2470 } while (0) 2471 2472 static void issue_volchange(const unsigned int oldvol, 2473 const unsigned int newvol, 2474 const u32 event_mask) 2475 { 2476 unsigned int i = oldvol; 2477 2478 while (i > newvol) { 2479 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2480 i--; 2481 } 2482 while (i < newvol) { 2483 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2484 i++; 2485 } 2486 } 2487 2488 static void issue_brightnesschange(const unsigned int oldbrt, 2489 const unsigned int newbrt, 2490 const u32 event_mask) 2491 { 2492 unsigned int i = oldbrt; 2493 2494 while (i > newbrt) { 2495 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2496 i--; 2497 } 2498 while (i < newbrt) { 2499 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2500 i++; 2501 } 2502 } 2503 2504 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2505 struct tp_nvram_state *newn, 2506 const u32 event_mask) 2507 { 2508 2509 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2510 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2511 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2512 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2513 2514 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2515 2516 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2517 2518 /* 2519 * Handle volume 2520 * 2521 * This code is supposed to duplicate the IBM firmware behaviour: 2522 * - Pressing MUTE issues mute hotkey message, even when already mute 2523 * - Pressing Volume up/down issues volume up/down hotkey messages, 2524 * even when already at maximum or minimum volume 2525 * - The act of unmuting issues volume up/down notification, 2526 * depending which key was used to unmute 2527 * 2528 * We are constrained to what the NVRAM can tell us, which is not much 2529 * and certainly not enough if more than one volume hotkey was pressed 2530 * since the last poll cycle. 2531 * 2532 * Just to make our life interesting, some newer Lenovo ThinkPads have 2533 * bugs in the BIOS and may fail to update volume_toggle properly. 2534 */ 2535 if (newn->mute) { 2536 /* muted */ 2537 if (!oldn->mute || 2538 oldn->volume_toggle != newn->volume_toggle || 2539 oldn->volume_level != newn->volume_level) { 2540 /* recently muted, or repeated mute keypress, or 2541 * multiple presses ending in mute */ 2542 issue_volchange(oldn->volume_level, newn->volume_level, 2543 event_mask); 2544 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2545 } 2546 } else { 2547 /* unmute */ 2548 if (oldn->mute) { 2549 /* recently unmuted, issue 'unmute' keypress */ 2550 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2551 } 2552 if (oldn->volume_level != newn->volume_level) { 2553 issue_volchange(oldn->volume_level, newn->volume_level, 2554 event_mask); 2555 } else if (oldn->volume_toggle != newn->volume_toggle) { 2556 /* repeated vol up/down keypress at end of scale ? */ 2557 if (newn->volume_level == 0) 2558 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2559 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2560 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2561 } 2562 } 2563 2564 /* handle brightness */ 2565 if (oldn->brightness_level != newn->brightness_level) { 2566 issue_brightnesschange(oldn->brightness_level, 2567 newn->brightness_level, event_mask); 2568 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2569 /* repeated key presses that didn't change state */ 2570 if (newn->brightness_level == 0) 2571 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2572 else if (newn->brightness_level >= bright_maxlvl 2573 && !tp_features.bright_unkfw) 2574 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2575 } 2576 2577 #undef TPACPI_COMPARE_KEY 2578 #undef TPACPI_MAY_SEND_KEY 2579 } 2580 2581 /* 2582 * Polling driver 2583 * 2584 * We track all events in hotkey_source_mask all the time, since 2585 * most of them are edge-based. We only issue those requested by 2586 * hotkey_user_mask or hotkey_driver_mask, though. 2587 */ 2588 static int hotkey_kthread(void *data) 2589 { 2590 struct tp_nvram_state s[2]; 2591 u32 poll_mask, event_mask; 2592 unsigned int si, so; 2593 unsigned long t; 2594 unsigned int change_detector; 2595 unsigned int poll_freq; 2596 bool was_frozen; 2597 2598 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2599 goto exit; 2600 2601 set_freezable(); 2602 2603 so = 0; 2604 si = 1; 2605 t = 0; 2606 2607 /* Initial state for compares */ 2608 mutex_lock(&hotkey_thread_data_mutex); 2609 change_detector = hotkey_config_change; 2610 poll_mask = hotkey_source_mask; 2611 event_mask = hotkey_source_mask & 2612 (hotkey_driver_mask | hotkey_user_mask); 2613 poll_freq = hotkey_poll_freq; 2614 mutex_unlock(&hotkey_thread_data_mutex); 2615 hotkey_read_nvram(&s[so], poll_mask); 2616 2617 while (!kthread_should_stop()) { 2618 if (t == 0) { 2619 if (likely(poll_freq)) 2620 t = 1000/poll_freq; 2621 else 2622 t = 100; /* should never happen... */ 2623 } 2624 t = msleep_interruptible(t); 2625 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2626 break; 2627 2628 if (t > 0 && !was_frozen) 2629 continue; 2630 2631 mutex_lock(&hotkey_thread_data_mutex); 2632 if (was_frozen || hotkey_config_change != change_detector) { 2633 /* forget old state on thaw or config change */ 2634 si = so; 2635 t = 0; 2636 change_detector = hotkey_config_change; 2637 } 2638 poll_mask = hotkey_source_mask; 2639 event_mask = hotkey_source_mask & 2640 (hotkey_driver_mask | hotkey_user_mask); 2641 poll_freq = hotkey_poll_freq; 2642 mutex_unlock(&hotkey_thread_data_mutex); 2643 2644 if (likely(poll_mask)) { 2645 hotkey_read_nvram(&s[si], poll_mask); 2646 if (likely(si != so)) { 2647 hotkey_compare_and_issue_event(&s[so], &s[si], 2648 event_mask); 2649 } 2650 } 2651 2652 so = si; 2653 si ^= 1; 2654 } 2655 2656 exit: 2657 return 0; 2658 } 2659 2660 /* call with hotkey_mutex held */ 2661 static void hotkey_poll_stop_sync(void) 2662 { 2663 if (tpacpi_hotkey_task) { 2664 kthread_stop(tpacpi_hotkey_task); 2665 tpacpi_hotkey_task = NULL; 2666 } 2667 } 2668 2669 /* call with hotkey_mutex held */ 2670 static void hotkey_poll_setup(const bool may_warn) 2671 { 2672 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2673 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2674 2675 if (hotkey_poll_freq > 0 && 2676 (poll_driver_mask || 2677 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2678 if (!tpacpi_hotkey_task) { 2679 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2680 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2681 if (IS_ERR(tpacpi_hotkey_task)) { 2682 tpacpi_hotkey_task = NULL; 2683 pr_err("could not create kernel thread for hotkey polling\n"); 2684 } 2685 } 2686 } else { 2687 hotkey_poll_stop_sync(); 2688 if (may_warn && (poll_driver_mask || poll_user_mask) && 2689 hotkey_poll_freq == 0) { 2690 pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n", 2691 poll_user_mask, poll_driver_mask); 2692 } 2693 } 2694 } 2695 2696 static void hotkey_poll_setup_safe(const bool may_warn) 2697 { 2698 mutex_lock(&hotkey_mutex); 2699 hotkey_poll_setup(may_warn); 2700 mutex_unlock(&hotkey_mutex); 2701 } 2702 2703 /* call with hotkey_mutex held */ 2704 static void hotkey_poll_set_freq(unsigned int freq) 2705 { 2706 if (!freq) 2707 hotkey_poll_stop_sync(); 2708 2709 hotkey_poll_freq = freq; 2710 } 2711 2712 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2713 2714 static void hotkey_poll_setup(const bool __unused) 2715 { 2716 } 2717 2718 static void hotkey_poll_setup_safe(const bool __unused) 2719 { 2720 } 2721 2722 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2723 2724 static int hotkey_inputdev_open(struct input_dev *dev) 2725 { 2726 switch (tpacpi_lifecycle) { 2727 case TPACPI_LIFE_INIT: 2728 case TPACPI_LIFE_RUNNING: 2729 hotkey_poll_setup_safe(false); 2730 return 0; 2731 case TPACPI_LIFE_EXITING: 2732 return -EBUSY; 2733 } 2734 2735 /* Should only happen if tpacpi_lifecycle is corrupt */ 2736 BUG(); 2737 return -EBUSY; 2738 } 2739 2740 static void hotkey_inputdev_close(struct input_dev *dev) 2741 { 2742 /* disable hotkey polling when possible */ 2743 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2744 !(hotkey_source_mask & hotkey_driver_mask)) 2745 hotkey_poll_setup_safe(false); 2746 } 2747 2748 /* sysfs hotkey enable ------------------------------------------------- */ 2749 static ssize_t hotkey_enable_show(struct device *dev, 2750 struct device_attribute *attr, 2751 char *buf) 2752 { 2753 int res, status; 2754 2755 printk_deprecated_attribute("hotkey_enable", 2756 "Hotkey reporting is always enabled"); 2757 2758 res = hotkey_status_get(&status); 2759 if (res) 2760 return res; 2761 2762 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2763 } 2764 2765 static ssize_t hotkey_enable_store(struct device *dev, 2766 struct device_attribute *attr, 2767 const char *buf, size_t count) 2768 { 2769 unsigned long t; 2770 2771 printk_deprecated_attribute("hotkey_enable", 2772 "Hotkeys can be disabled through hotkey_mask"); 2773 2774 if (parse_strtoul(buf, 1, &t)) 2775 return -EINVAL; 2776 2777 if (t == 0) 2778 return -EPERM; 2779 2780 return count; 2781 } 2782 2783 static DEVICE_ATTR_RW(hotkey_enable); 2784 2785 /* sysfs hotkey mask --------------------------------------------------- */ 2786 static ssize_t hotkey_mask_show(struct device *dev, 2787 struct device_attribute *attr, 2788 char *buf) 2789 { 2790 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2791 } 2792 2793 static ssize_t hotkey_mask_store(struct device *dev, 2794 struct device_attribute *attr, 2795 const char *buf, size_t count) 2796 { 2797 unsigned long t; 2798 int res; 2799 2800 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2801 return -EINVAL; 2802 2803 if (mutex_lock_killable(&hotkey_mutex)) 2804 return -ERESTARTSYS; 2805 2806 res = hotkey_user_mask_set(t); 2807 2808 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2809 hotkey_poll_setup(true); 2810 #endif 2811 2812 mutex_unlock(&hotkey_mutex); 2813 2814 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2815 2816 return (res) ? res : count; 2817 } 2818 2819 static DEVICE_ATTR_RW(hotkey_mask); 2820 2821 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2822 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2823 struct device_attribute *attr, 2824 char *buf) 2825 { 2826 return sprintf(buf, "0\n"); 2827 } 2828 2829 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2830 2831 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2832 static ssize_t hotkey_bios_mask_show(struct device *dev, 2833 struct device_attribute *attr, 2834 char *buf) 2835 { 2836 printk_deprecated_attribute("hotkey_bios_mask", 2837 "This attribute is useless."); 2838 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2839 } 2840 2841 static DEVICE_ATTR_RO(hotkey_bios_mask); 2842 2843 /* sysfs hotkey all_mask ----------------------------------------------- */ 2844 static ssize_t hotkey_all_mask_show(struct device *dev, 2845 struct device_attribute *attr, 2846 char *buf) 2847 { 2848 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2849 hotkey_all_mask | hotkey_source_mask); 2850 } 2851 2852 static DEVICE_ATTR_RO(hotkey_all_mask); 2853 2854 /* sysfs hotkey all_mask ----------------------------------------------- */ 2855 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev, 2856 struct device_attribute *attr, 2857 char *buf) 2858 { 2859 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2860 hotkey_adaptive_all_mask | hotkey_source_mask); 2861 } 2862 2863 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask); 2864 2865 /* sysfs hotkey recommended_mask --------------------------------------- */ 2866 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2867 struct device_attribute *attr, 2868 char *buf) 2869 { 2870 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2871 (hotkey_all_mask | hotkey_source_mask) 2872 & ~hotkey_reserved_mask); 2873 } 2874 2875 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2876 2877 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2878 2879 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2880 static ssize_t hotkey_source_mask_show(struct device *dev, 2881 struct device_attribute *attr, 2882 char *buf) 2883 { 2884 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2885 } 2886 2887 static ssize_t hotkey_source_mask_store(struct device *dev, 2888 struct device_attribute *attr, 2889 const char *buf, size_t count) 2890 { 2891 unsigned long t; 2892 u32 r_ev; 2893 int rc; 2894 2895 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2896 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2897 return -EINVAL; 2898 2899 if (mutex_lock_killable(&hotkey_mutex)) 2900 return -ERESTARTSYS; 2901 2902 HOTKEY_CONFIG_CRITICAL_START 2903 hotkey_source_mask = t; 2904 HOTKEY_CONFIG_CRITICAL_END 2905 2906 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2907 ~hotkey_source_mask); 2908 hotkey_poll_setup(true); 2909 2910 /* check if events needed by the driver got disabled */ 2911 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2912 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2913 2914 mutex_unlock(&hotkey_mutex); 2915 2916 if (rc < 0) 2917 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n"); 2918 2919 if (r_ev) 2920 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n", 2921 r_ev); 2922 2923 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2924 2925 return (rc < 0) ? rc : count; 2926 } 2927 2928 static DEVICE_ATTR_RW(hotkey_source_mask); 2929 2930 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2931 static ssize_t hotkey_poll_freq_show(struct device *dev, 2932 struct device_attribute *attr, 2933 char *buf) 2934 { 2935 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2936 } 2937 2938 static ssize_t hotkey_poll_freq_store(struct device *dev, 2939 struct device_attribute *attr, 2940 const char *buf, size_t count) 2941 { 2942 unsigned long t; 2943 2944 if (parse_strtoul(buf, 25, &t)) 2945 return -EINVAL; 2946 2947 if (mutex_lock_killable(&hotkey_mutex)) 2948 return -ERESTARTSYS; 2949 2950 hotkey_poll_set_freq(t); 2951 hotkey_poll_setup(true); 2952 2953 mutex_unlock(&hotkey_mutex); 2954 2955 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2956 2957 return count; 2958 } 2959 2960 static DEVICE_ATTR_RW(hotkey_poll_freq); 2961 2962 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2963 2964 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2965 static ssize_t hotkey_radio_sw_show(struct device *dev, 2966 struct device_attribute *attr, 2967 char *buf) 2968 { 2969 int res; 2970 res = hotkey_get_wlsw(); 2971 if (res < 0) 2972 return res; 2973 2974 /* Opportunistic update */ 2975 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2976 2977 return snprintf(buf, PAGE_SIZE, "%d\n", 2978 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2979 } 2980 2981 static DEVICE_ATTR_RO(hotkey_radio_sw); 2982 2983 static void hotkey_radio_sw_notify_change(void) 2984 { 2985 if (tp_features.hotkey_wlsw) 2986 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2987 "hotkey_radio_sw"); 2988 } 2989 2990 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2991 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2992 struct device_attribute *attr, 2993 char *buf) 2994 { 2995 int res, s; 2996 res = hotkey_get_tablet_mode(&s); 2997 if (res < 0) 2998 return res; 2999 3000 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 3001 } 3002 3003 static DEVICE_ATTR_RO(hotkey_tablet_mode); 3004 3005 static void hotkey_tablet_mode_notify_change(void) 3006 { 3007 if (tp_features.hotkey_tablet) 3008 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3009 "hotkey_tablet_mode"); 3010 } 3011 3012 /* sysfs wakeup reason (pollable) -------------------------------------- */ 3013 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 3014 struct device_attribute *attr, 3015 char *buf) 3016 { 3017 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 3018 } 3019 3020 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 3021 3022 static void hotkey_wakeup_reason_notify_change(void) 3023 { 3024 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3025 "wakeup_reason"); 3026 } 3027 3028 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 3029 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 3030 struct device_attribute *attr, 3031 char *buf) 3032 { 3033 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 3034 } 3035 3036 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 3037 hotkey_wakeup_hotunplug_complete_show, NULL); 3038 3039 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 3040 { 3041 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3042 "wakeup_hotunplug_complete"); 3043 } 3044 3045 /* sysfs adaptive kbd mode --------------------------------------------- */ 3046 3047 static int adaptive_keyboard_get_mode(void); 3048 static int adaptive_keyboard_set_mode(int new_mode); 3049 3050 enum ADAPTIVE_KEY_MODE { 3051 HOME_MODE, 3052 WEB_BROWSER_MODE, 3053 WEB_CONFERENCE_MODE, 3054 FUNCTION_MODE, 3055 LAYFLAT_MODE 3056 }; 3057 3058 static ssize_t adaptive_kbd_mode_show(struct device *dev, 3059 struct device_attribute *attr, 3060 char *buf) 3061 { 3062 int current_mode; 3063 3064 current_mode = adaptive_keyboard_get_mode(); 3065 if (current_mode < 0) 3066 return current_mode; 3067 3068 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 3069 } 3070 3071 static ssize_t adaptive_kbd_mode_store(struct device *dev, 3072 struct device_attribute *attr, 3073 const char *buf, size_t count) 3074 { 3075 unsigned long t; 3076 int res; 3077 3078 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 3079 return -EINVAL; 3080 3081 res = adaptive_keyboard_set_mode(t); 3082 return (res < 0) ? res : count; 3083 } 3084 3085 static DEVICE_ATTR_RW(adaptive_kbd_mode); 3086 3087 static struct attribute *adaptive_kbd_attributes[] = { 3088 &dev_attr_adaptive_kbd_mode.attr, 3089 NULL 3090 }; 3091 3092 static const struct attribute_group adaptive_kbd_attr_group = { 3093 .attrs = adaptive_kbd_attributes, 3094 }; 3095 3096 /* --------------------------------------------------------------------- */ 3097 3098 static struct attribute *hotkey_attributes[] __initdata = { 3099 &dev_attr_hotkey_enable.attr, 3100 &dev_attr_hotkey_bios_enabled.attr, 3101 &dev_attr_hotkey_bios_mask.attr, 3102 &dev_attr_wakeup_reason.attr, 3103 &dev_attr_wakeup_hotunplug_complete.attr, 3104 &dev_attr_hotkey_mask.attr, 3105 &dev_attr_hotkey_all_mask.attr, 3106 &dev_attr_hotkey_adaptive_all_mask.attr, 3107 &dev_attr_hotkey_recommended_mask.attr, 3108 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3109 &dev_attr_hotkey_source_mask.attr, 3110 &dev_attr_hotkey_poll_freq.attr, 3111 #endif 3112 }; 3113 3114 /* 3115 * Sync both the hw and sw blocking state of all switches 3116 */ 3117 static void tpacpi_send_radiosw_update(void) 3118 { 3119 int wlsw; 3120 3121 /* 3122 * We must sync all rfkill controllers *before* issuing any 3123 * rfkill input events, or we will race the rfkill core input 3124 * handler. 3125 * 3126 * tpacpi_inputdev_send_mutex works as a synchronization point 3127 * for the above. 3128 * 3129 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3130 */ 3131 3132 wlsw = hotkey_get_wlsw(); 3133 3134 /* Sync hw blocking state first if it is hw-blocked */ 3135 if (wlsw == TPACPI_RFK_RADIO_OFF) 3136 tpacpi_rfk_update_hwblock_state(true); 3137 3138 /* Sync sw blocking state */ 3139 tpacpi_rfk_update_swstate_all(); 3140 3141 /* Sync hw blocking state last if it is hw-unblocked */ 3142 if (wlsw == TPACPI_RFK_RADIO_ON) 3143 tpacpi_rfk_update_hwblock_state(false); 3144 3145 /* Issue rfkill input event for WLSW switch */ 3146 if (!(wlsw < 0)) { 3147 mutex_lock(&tpacpi_inputdev_send_mutex); 3148 3149 input_report_switch(tpacpi_inputdev, 3150 SW_RFKILL_ALL, (wlsw > 0)); 3151 input_sync(tpacpi_inputdev); 3152 3153 mutex_unlock(&tpacpi_inputdev_send_mutex); 3154 } 3155 3156 /* 3157 * this can be unconditional, as we will poll state again 3158 * if userspace uses the notify to read data 3159 */ 3160 hotkey_radio_sw_notify_change(); 3161 } 3162 3163 static void hotkey_exit(void) 3164 { 3165 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3166 mutex_lock(&hotkey_mutex); 3167 hotkey_poll_stop_sync(); 3168 mutex_unlock(&hotkey_mutex); 3169 #endif 3170 3171 if (hotkey_dev_attributes) 3172 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3173 3174 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3175 "restoring original HKEY status and mask\n"); 3176 /* yes, there is a bitwise or below, we want the 3177 * functions to be called even if one of them fail */ 3178 if (((tp_features.hotkey_mask && 3179 hotkey_mask_set(hotkey_orig_mask)) | 3180 hotkey_status_set(false)) != 0) 3181 pr_err("failed to restore hot key mask to BIOS defaults\n"); 3182 } 3183 3184 static void __init hotkey_unmap(const unsigned int scancode) 3185 { 3186 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3187 clear_bit(hotkey_keycode_map[scancode], 3188 tpacpi_inputdev->keybit); 3189 hotkey_keycode_map[scancode] = KEY_RESERVED; 3190 } 3191 } 3192 3193 /* 3194 * HKEY quirks: 3195 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3196 */ 3197 3198 #define TPACPI_HK_Q_INIMASK 0x0001 3199 3200 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3201 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3202 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3203 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3204 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3205 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3206 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3207 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3208 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3209 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3210 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3211 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3212 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3213 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3214 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3215 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3216 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3217 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3218 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3219 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3220 }; 3221 3222 typedef u16 tpacpi_keymap_entry_t; 3223 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3224 3225 static int hotkey_init_tablet_mode(void) 3226 { 3227 int in_tablet_mode = 0, res; 3228 char *type = NULL; 3229 3230 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) { 3231 int has_tablet_mode; 3232 3233 in_tablet_mode = hotkey_gmms_get_tablet_mode(res, 3234 &has_tablet_mode); 3235 if (has_tablet_mode) 3236 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS; 3237 type = "GMMS"; 3238 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { 3239 /* For X41t, X60t, X61t Tablets... */ 3240 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; 3241 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); 3242 type = "MHKG"; 3243 } 3244 3245 if (!tp_features.hotkey_tablet) 3246 return 0; 3247 3248 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", 3249 type, in_tablet_mode ? "tablet" : "laptop"); 3250 3251 res = add_to_attr_set(hotkey_dev_attributes, 3252 &dev_attr_hotkey_tablet_mode.attr); 3253 if (res) 3254 return -1; 3255 3256 return in_tablet_mode; 3257 } 3258 3259 static int __init hotkey_init(struct ibm_init_struct *iibm) 3260 { 3261 /* Requirements for changing the default keymaps: 3262 * 3263 * 1. Many of the keys are mapped to KEY_RESERVED for very 3264 * good reasons. Do not change them unless you have deep 3265 * knowledge on the IBM and Lenovo ThinkPad firmware for 3266 * the various ThinkPad models. The driver behaves 3267 * differently for KEY_RESERVED: such keys have their 3268 * hot key mask *unset* in mask_recommended, and also 3269 * in the initial hot key mask programmed into the 3270 * firmware at driver load time, which means the firm- 3271 * ware may react very differently if you change them to 3272 * something else; 3273 * 3274 * 2. You must be subscribed to the linux-thinkpad and 3275 * ibm-acpi-devel mailing lists, and you should read the 3276 * list archives since 2007 if you want to change the 3277 * keymaps. This requirement exists so that you will 3278 * know the past history of problems with the thinkpad- 3279 * acpi driver keymaps, and also that you will be 3280 * listening to any bug reports; 3281 * 3282 * 3. Do not send thinkpad-acpi specific patches directly to 3283 * for merging, *ever*. Send them to the linux-acpi 3284 * mailinglist for comments. Merging is to be done only 3285 * through acpi-test and the ACPI maintainer. 3286 * 3287 * If the above is too much to ask, don't change the keymap. 3288 * Ask the thinkpad-acpi maintainer to do it, instead. 3289 */ 3290 3291 enum keymap_index { 3292 TPACPI_KEYMAP_IBM_GENERIC = 0, 3293 TPACPI_KEYMAP_LENOVO_GENERIC, 3294 }; 3295 3296 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3297 /* Generic keymap for IBM ThinkPads */ 3298 [TPACPI_KEYMAP_IBM_GENERIC] = { 3299 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3300 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3301 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3302 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3303 3304 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3305 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3306 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3307 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3308 3309 /* brightness: firmware always reacts to them */ 3310 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3311 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3312 3313 /* Thinklight: firmware always react to it */ 3314 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3315 3316 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3317 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3318 3319 /* Volume: firmware always react to it and reprograms 3320 * the built-in *extra* mixer. Never map it to control 3321 * another mixer by default. */ 3322 KEY_RESERVED, /* 0x14: VOLUME UP */ 3323 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3324 KEY_RESERVED, /* 0x16: MUTE */ 3325 3326 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3327 3328 /* (assignments unknown, please report if found) */ 3329 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3330 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3331 3332 /* No assignments, only used for Adaptive keyboards. */ 3333 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3334 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3335 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3336 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3337 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3338 3339 /* No assignment, used for newer Lenovo models */ 3340 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3341 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3342 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3343 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3344 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3345 KEY_UNKNOWN, KEY_UNKNOWN 3346 3347 }, 3348 3349 /* Generic keymap for Lenovo ThinkPads */ 3350 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3351 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3352 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3353 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3354 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3355 3356 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3357 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3358 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3359 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3360 3361 /* These should be enabled --only-- when ACPI video 3362 * is disabled (i.e. in "vendor" mode), and are handled 3363 * in a special way by the init code */ 3364 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3365 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3366 3367 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3368 3369 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3370 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3371 3372 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3373 * react to it and reprograms the built-in *extra* mixer. 3374 * Never map it to control another mixer by default. 3375 * 3376 * T60?, T61, R60?, R61: firmware and EC tries to send 3377 * these over the regular keyboard, so these are no-ops, 3378 * but there are still weird bugs re. MUTE, so do not 3379 * change unless you get test reports from all Lenovo 3380 * models. May cause the BIOS to interfere with the 3381 * HDA mixer. 3382 */ 3383 KEY_RESERVED, /* 0x14: VOLUME UP */ 3384 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3385 KEY_RESERVED, /* 0x16: MUTE */ 3386 3387 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3388 3389 /* (assignments unknown, please report if found) */ 3390 KEY_UNKNOWN, KEY_UNKNOWN, 3391 3392 /* 3393 * The mic mute button only sends 0x1a. It does not 3394 * automatically mute the mic or change the mute light. 3395 */ 3396 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3397 3398 /* (assignments unknown, please report if found) */ 3399 KEY_UNKNOWN, 3400 3401 /* Extra keys in use since the X240 / T440 / T540 */ 3402 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3403 3404 /* 3405 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3406 * The first item in this list is the Mute button which is 3407 * emitted with 0x103 through 3408 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3409 * symbol is held. 3410 * We'll need to offset those by 0x20. 3411 */ 3412 KEY_RESERVED, /* Mute held, 0x103 */ 3413 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3414 KEY_RESERVED, /* Clipping tool */ 3415 KEY_RESERVED, /* Cloud */ 3416 KEY_RESERVED, 3417 KEY_VOICECOMMAND, /* Voice */ 3418 KEY_RESERVED, 3419 KEY_RESERVED, /* Gestures */ 3420 KEY_RESERVED, 3421 KEY_RESERVED, 3422 KEY_RESERVED, 3423 KEY_CONFIG, /* Settings */ 3424 KEY_RESERVED, /* New tab */ 3425 KEY_REFRESH, /* Reload */ 3426 KEY_BACK, /* Back */ 3427 KEY_RESERVED, /* Microphone down */ 3428 KEY_RESERVED, /* Microphone up */ 3429 KEY_RESERVED, /* Microphone cancellation */ 3430 KEY_RESERVED, /* Camera mode */ 3431 KEY_RESERVED, /* Rotate display, 0x116 */ 3432 3433 /* 3434 * These are found in 2017 models (e.g. T470s, X270). 3435 * The lowest known value is 0x311, which according to 3436 * the manual should launch a user defined favorite 3437 * application. 3438 * 3439 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START, 3440 * corresponding to 0x34. 3441 */ 3442 3443 /* (assignments unknown, please report if found) */ 3444 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3445 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3446 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3447 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3448 KEY_UNKNOWN, 3449 3450 KEY_BOOKMARKS, /* Favorite app, 0x311 */ 3451 KEY_RESERVED, /* Clipping tool */ 3452 KEY_CALC, /* Calculator (above numpad, P52) */ 3453 KEY_BLUETOOTH, /* Bluetooth */ 3454 KEY_KEYBOARD /* Keyboard, 0x315 */ 3455 }, 3456 }; 3457 3458 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3459 /* Generic maps (fallback) */ 3460 { 3461 .vendor = PCI_VENDOR_ID_IBM, 3462 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3463 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3464 }, 3465 { 3466 .vendor = PCI_VENDOR_ID_LENOVO, 3467 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3468 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3469 }, 3470 }; 3471 3472 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3473 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3474 3475 int res, i; 3476 int status; 3477 int hkeyv; 3478 bool radiosw_state = false; 3479 bool tabletsw_state = false; 3480 3481 unsigned long quirks; 3482 unsigned long keymap_id; 3483 3484 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3485 "initializing hotkey subdriver\n"); 3486 3487 BUG_ON(!tpacpi_inputdev); 3488 BUG_ON(tpacpi_inputdev->open != NULL || 3489 tpacpi_inputdev->close != NULL); 3490 3491 TPACPI_ACPIHANDLE_INIT(hkey); 3492 mutex_init(&hotkey_mutex); 3493 3494 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3495 mutex_init(&hotkey_thread_data_mutex); 3496 #endif 3497 3498 /* hotkey not supported on 570 */ 3499 tp_features.hotkey = hkey_handle != NULL; 3500 3501 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3502 "hotkeys are %s\n", 3503 str_supported(tp_features.hotkey)); 3504 3505 if (!tp_features.hotkey) 3506 return 1; 3507 3508 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3509 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3510 3511 tpacpi_disable_brightness_delay(); 3512 3513 /* MUST have enough space for all attributes to be added to 3514 * hotkey_dev_attributes */ 3515 hotkey_dev_attributes = create_attr_set( 3516 ARRAY_SIZE(hotkey_attributes) + 2, 3517 NULL); 3518 if (!hotkey_dev_attributes) 3519 return -ENOMEM; 3520 res = add_many_to_attr_set(hotkey_dev_attributes, 3521 hotkey_attributes, 3522 ARRAY_SIZE(hotkey_attributes)); 3523 if (res) 3524 goto err_exit; 3525 3526 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3527 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3528 for HKEY interface version 0x100 */ 3529 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3530 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3531 "firmware HKEY interface version: 0x%x\n", 3532 hkeyv); 3533 3534 switch (hkeyv >> 8) { 3535 case 1: 3536 /* 3537 * MHKV 0x100 in A31, R40, R40e, 3538 * T4x, X31, and later 3539 */ 3540 3541 /* Paranoia check AND init hotkey_all_mask */ 3542 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3543 "MHKA", "qd")) { 3544 pr_err("missing MHKA handler, please report this to %s\n", 3545 TPACPI_MAIL); 3546 /* Fallback: pre-init for FN+F3,F4,F12 */ 3547 hotkey_all_mask = 0x080cU; 3548 } else { 3549 tp_features.hotkey_mask = 1; 3550 } 3551 break; 3552 3553 case 2: 3554 /* 3555 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3556 */ 3557 3558 /* Paranoia check AND init hotkey_all_mask */ 3559 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3560 "MHKA", "dd", 1)) { 3561 pr_err("missing MHKA handler, please report this to %s\n", 3562 TPACPI_MAIL); 3563 /* Fallback: pre-init for FN+F3,F4,F12 */ 3564 hotkey_all_mask = 0x080cU; 3565 } else { 3566 tp_features.hotkey_mask = 1; 3567 } 3568 3569 /* 3570 * Check if we have an adaptive keyboard, like on the 3571 * Lenovo Carbon X1 2014 (2nd Gen). 3572 */ 3573 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3574 "MHKA", "dd", 2)) { 3575 if (hotkey_adaptive_all_mask != 0) { 3576 tp_features.has_adaptive_kbd = true; 3577 res = sysfs_create_group( 3578 &tpacpi_pdev->dev.kobj, 3579 &adaptive_kbd_attr_group); 3580 if (res) 3581 goto err_exit; 3582 } 3583 } else { 3584 tp_features.has_adaptive_kbd = false; 3585 hotkey_adaptive_all_mask = 0x0U; 3586 } 3587 break; 3588 3589 default: 3590 pr_err("unknown version of the HKEY interface: 0x%x\n", 3591 hkeyv); 3592 pr_err("please report this to %s\n", TPACPI_MAIL); 3593 break; 3594 } 3595 } 3596 3597 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3598 "hotkey masks are %s\n", 3599 str_supported(tp_features.hotkey_mask)); 3600 3601 /* Init hotkey_all_mask if not initialized yet */ 3602 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3603 (quirks & TPACPI_HK_Q_INIMASK)) 3604 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3605 3606 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3607 if (tp_features.hotkey_mask) { 3608 /* hotkey_source_mask *must* be zero for 3609 * the first hotkey_mask_get to return hotkey_orig_mask */ 3610 res = hotkey_mask_get(); 3611 if (res) 3612 goto err_exit; 3613 3614 hotkey_orig_mask = hotkey_acpi_mask; 3615 } else { 3616 hotkey_orig_mask = hotkey_all_mask; 3617 hotkey_acpi_mask = hotkey_all_mask; 3618 } 3619 3620 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3621 if (dbg_wlswemul) { 3622 tp_features.hotkey_wlsw = 1; 3623 radiosw_state = !!tpacpi_wlsw_emulstate; 3624 pr_info("radio switch emulation enabled\n"); 3625 } else 3626 #endif 3627 /* Not all thinkpads have a hardware radio switch */ 3628 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3629 tp_features.hotkey_wlsw = 1; 3630 radiosw_state = !!status; 3631 pr_info("radio switch found; radios are %s\n", 3632 enabled(status, 0)); 3633 } 3634 if (tp_features.hotkey_wlsw) 3635 res = add_to_attr_set(hotkey_dev_attributes, 3636 &dev_attr_hotkey_radio_sw.attr); 3637 3638 res = hotkey_init_tablet_mode(); 3639 if (res < 0) 3640 goto err_exit; 3641 3642 tabletsw_state = res; 3643 3644 res = register_attr_set_with_sysfs(hotkey_dev_attributes, 3645 &tpacpi_pdev->dev.kobj); 3646 if (res) 3647 goto err_exit; 3648 3649 /* Set up key map */ 3650 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3651 GFP_KERNEL); 3652 if (!hotkey_keycode_map) { 3653 pr_err("failed to allocate memory for key map\n"); 3654 res = -ENOMEM; 3655 goto err_exit; 3656 } 3657 3658 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3659 ARRAY_SIZE(tpacpi_keymap_qtable)); 3660 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3661 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3662 "using keymap number %lu\n", keymap_id); 3663 3664 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3665 TPACPI_HOTKEY_MAP_SIZE); 3666 3667 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3668 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3669 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3670 tpacpi_inputdev->keycode = hotkey_keycode_map; 3671 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3672 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3673 input_set_capability(tpacpi_inputdev, EV_KEY, 3674 hotkey_keycode_map[i]); 3675 } else { 3676 if (i < sizeof(hotkey_reserved_mask)*8) 3677 hotkey_reserved_mask |= 1 << i; 3678 } 3679 } 3680 3681 if (tp_features.hotkey_wlsw) { 3682 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3683 input_report_switch(tpacpi_inputdev, 3684 SW_RFKILL_ALL, radiosw_state); 3685 } 3686 if (tp_features.hotkey_tablet) { 3687 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3688 input_report_switch(tpacpi_inputdev, 3689 SW_TABLET_MODE, tabletsw_state); 3690 } 3691 3692 /* Do not issue duplicate brightness change events to 3693 * userspace. tpacpi_detect_brightness_capabilities() must have 3694 * been called before this point */ 3695 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3696 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n"); 3697 pr_notice("Disabling thinkpad-acpi brightness events by default...\n"); 3698 3699 /* Disable brightness up/down on Lenovo thinkpads when 3700 * ACPI is handling them, otherwise it is plain impossible 3701 * for userspace to do something even remotely sane */ 3702 hotkey_reserved_mask |= 3703 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3704 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3705 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3706 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3707 } 3708 3709 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3710 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3711 & ~hotkey_all_mask 3712 & ~hotkey_reserved_mask; 3713 3714 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3715 "hotkey source mask 0x%08x, polling freq %u\n", 3716 hotkey_source_mask, hotkey_poll_freq); 3717 #endif 3718 3719 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3720 "enabling firmware HKEY event interface...\n"); 3721 res = hotkey_status_set(true); 3722 if (res) { 3723 hotkey_exit(); 3724 return res; 3725 } 3726 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3727 | hotkey_driver_mask) 3728 & ~hotkey_source_mask); 3729 if (res < 0 && res != -ENXIO) { 3730 hotkey_exit(); 3731 return res; 3732 } 3733 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3734 & ~hotkey_reserved_mask; 3735 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3736 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3737 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3738 3739 tpacpi_inputdev->open = &hotkey_inputdev_open; 3740 tpacpi_inputdev->close = &hotkey_inputdev_close; 3741 3742 hotkey_poll_setup_safe(true); 3743 3744 return 0; 3745 3746 err_exit: 3747 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3748 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3749 &adaptive_kbd_attr_group); 3750 3751 hotkey_dev_attributes = NULL; 3752 3753 return (res < 0) ? res : 1; 3754 } 3755 3756 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3757 * mode, Web conference mode, Function mode and Lay-flat mode. 3758 * We support Home mode and Function mode currently. 3759 * 3760 * Will consider support rest of modes in future. 3761 * 3762 */ 3763 static const int adaptive_keyboard_modes[] = { 3764 HOME_MODE, 3765 /* WEB_BROWSER_MODE = 2, 3766 WEB_CONFERENCE_MODE = 3, */ 3767 FUNCTION_MODE 3768 }; 3769 3770 #define DFR_CHANGE_ROW 0x101 3771 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3772 #define FIRST_ADAPTIVE_KEY 0x103 3773 3774 /* press Fn key a while second, it will switch to Function Mode. Then 3775 * release Fn key, previous mode be restored. 3776 */ 3777 static bool adaptive_keyboard_mode_is_saved; 3778 static int adaptive_keyboard_prev_mode; 3779 3780 static int adaptive_keyboard_get_mode(void) 3781 { 3782 int mode = 0; 3783 3784 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3785 pr_err("Cannot read adaptive keyboard mode\n"); 3786 return -EIO; 3787 } 3788 3789 return mode; 3790 } 3791 3792 static int adaptive_keyboard_set_mode(int new_mode) 3793 { 3794 if (new_mode < 0 || 3795 new_mode > LAYFLAT_MODE) 3796 return -EINVAL; 3797 3798 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3799 pr_err("Cannot set adaptive keyboard mode\n"); 3800 return -EIO; 3801 } 3802 3803 return 0; 3804 } 3805 3806 static int adaptive_keyboard_get_next_mode(int mode) 3807 { 3808 size_t i; 3809 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3810 3811 for (i = 0; i <= max_mode; i++) { 3812 if (adaptive_keyboard_modes[i] == mode) 3813 break; 3814 } 3815 3816 if (i >= max_mode) 3817 i = 0; 3818 else 3819 i++; 3820 3821 return adaptive_keyboard_modes[i]; 3822 } 3823 3824 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3825 { 3826 int current_mode = 0; 3827 int new_mode = 0; 3828 int keycode; 3829 3830 switch (scancode) { 3831 case DFR_CHANGE_ROW: 3832 if (adaptive_keyboard_mode_is_saved) { 3833 new_mode = adaptive_keyboard_prev_mode; 3834 adaptive_keyboard_mode_is_saved = false; 3835 } else { 3836 current_mode = adaptive_keyboard_get_mode(); 3837 if (current_mode < 0) 3838 return false; 3839 new_mode = adaptive_keyboard_get_next_mode( 3840 current_mode); 3841 } 3842 3843 if (adaptive_keyboard_set_mode(new_mode) < 0) 3844 return false; 3845 3846 return true; 3847 3848 case DFR_SHOW_QUICKVIEW_ROW: 3849 current_mode = adaptive_keyboard_get_mode(); 3850 if (current_mode < 0) 3851 return false; 3852 3853 adaptive_keyboard_prev_mode = current_mode; 3854 adaptive_keyboard_mode_is_saved = true; 3855 3856 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3857 return false; 3858 return true; 3859 3860 default: 3861 if (scancode < FIRST_ADAPTIVE_KEY || 3862 scancode >= FIRST_ADAPTIVE_KEY + 3863 TP_ACPI_HOTKEYSCAN_EXTENDED_START - 3864 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3865 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3866 scancode); 3867 return false; 3868 } 3869 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + 3870 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START]; 3871 if (keycode != KEY_RESERVED) { 3872 mutex_lock(&tpacpi_inputdev_send_mutex); 3873 3874 input_report_key(tpacpi_inputdev, keycode, 1); 3875 input_sync(tpacpi_inputdev); 3876 3877 input_report_key(tpacpi_inputdev, keycode, 0); 3878 input_sync(tpacpi_inputdev); 3879 3880 mutex_unlock(&tpacpi_inputdev_send_mutex); 3881 } 3882 return true; 3883 } 3884 } 3885 3886 static bool hotkey_notify_hotkey(const u32 hkey, 3887 bool *send_acpi_ev, 3888 bool *ignore_acpi_ev) 3889 { 3890 /* 0x1000-0x1FFF: key presses */ 3891 unsigned int scancode = hkey & 0xfff; 3892 *send_acpi_ev = true; 3893 *ignore_acpi_ev = false; 3894 3895 /* 3896 * Original events are in the 0x10XX range, the adaptive keyboard 3897 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017 3898 * models, additional keys are emitted through 0x13XX. 3899 */ 3900 switch ((hkey >> 8) & 0xf) { 3901 case 0: 3902 if (scancode > 0 && 3903 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3904 /* HKEY event 0x1001 is scancode 0x00 */ 3905 scancode--; 3906 if (!(hotkey_source_mask & (1 << scancode))) { 3907 tpacpi_input_send_key_masked(scancode); 3908 *send_acpi_ev = false; 3909 } else { 3910 *ignore_acpi_ev = true; 3911 } 3912 return true; 3913 } 3914 break; 3915 3916 case 1: 3917 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3918 3919 case 3: 3920 /* Extended keycodes start at 0x300 and our offset into the map 3921 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode 3922 * will be positive, but might not be in the correct range. 3923 */ 3924 scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START); 3925 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START && 3926 scancode < TPACPI_HOTKEY_MAP_LEN) { 3927 tpacpi_input_send_key(scancode); 3928 return true; 3929 } 3930 break; 3931 } 3932 3933 return false; 3934 } 3935 3936 static bool hotkey_notify_wakeup(const u32 hkey, 3937 bool *send_acpi_ev, 3938 bool *ignore_acpi_ev) 3939 { 3940 /* 0x2000-0x2FFF: Wakeup reason */ 3941 *send_acpi_ev = true; 3942 *ignore_acpi_ev = false; 3943 3944 switch (hkey) { 3945 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3946 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3947 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3948 *ignore_acpi_ev = true; 3949 break; 3950 3951 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3952 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3953 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3954 *ignore_acpi_ev = true; 3955 break; 3956 3957 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3958 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3959 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3960 /* how to auto-heal: */ 3961 /* 2313: woke up from S3, go to S4/S5 */ 3962 /* 2413: woke up from S4, go to S5 */ 3963 break; 3964 3965 default: 3966 return false; 3967 } 3968 3969 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3970 pr_info("woke up due to a hot-unplug request...\n"); 3971 hotkey_wakeup_reason_notify_change(); 3972 } 3973 return true; 3974 } 3975 3976 static bool hotkey_notify_dockevent(const u32 hkey, 3977 bool *send_acpi_ev, 3978 bool *ignore_acpi_ev) 3979 { 3980 /* 0x4000-0x4FFF: dock-related events */ 3981 *send_acpi_ev = true; 3982 *ignore_acpi_ev = false; 3983 3984 switch (hkey) { 3985 case TP_HKEY_EV_UNDOCK_ACK: 3986 /* ACPI undock operation completed after wakeup */ 3987 hotkey_autosleep_ack = 1; 3988 pr_info("undocked\n"); 3989 hotkey_wakeup_hotunplug_complete_notify_change(); 3990 return true; 3991 3992 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3993 pr_info("docked into hotplug port replicator\n"); 3994 return true; 3995 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3996 pr_info("undocked from hotplug port replicator\n"); 3997 return true; 3998 3999 default: 4000 return false; 4001 } 4002 } 4003 4004 static bool hotkey_notify_usrevent(const u32 hkey, 4005 bool *send_acpi_ev, 4006 bool *ignore_acpi_ev) 4007 { 4008 /* 0x5000-0x5FFF: human interface helpers */ 4009 *send_acpi_ev = true; 4010 *ignore_acpi_ev = false; 4011 4012 switch (hkey) { 4013 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 4014 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 4015 return true; 4016 4017 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 4018 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 4019 tpacpi_input_send_tabletsw(); 4020 hotkey_tablet_mode_notify_change(); 4021 *send_acpi_ev = false; 4022 return true; 4023 4024 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 4025 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 4026 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 4027 /* do not propagate these events */ 4028 *ignore_acpi_ev = true; 4029 return true; 4030 4031 default: 4032 return false; 4033 } 4034 } 4035 4036 static void thermal_dump_all_sensors(void); 4037 4038 static bool hotkey_notify_6xxx(const u32 hkey, 4039 bool *send_acpi_ev, 4040 bool *ignore_acpi_ev) 4041 { 4042 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 4043 *send_acpi_ev = true; 4044 *ignore_acpi_ev = false; 4045 4046 switch (hkey) { 4047 case TP_HKEY_EV_THM_TABLE_CHANGED: 4048 pr_debug("EC reports: Thermal Table has changed\n"); 4049 /* recommended action: do nothing, we don't have 4050 * Lenovo ATM information */ 4051 return true; 4052 case TP_HKEY_EV_THM_CSM_COMPLETED: 4053 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n"); 4054 /* recommended action: do nothing, we don't have 4055 * Lenovo ATM information */ 4056 return true; 4057 case TP_HKEY_EV_THM_TRANSFM_CHANGED: 4058 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n"); 4059 /* recommended action: do nothing, we don't have 4060 * Lenovo ATM information */ 4061 return true; 4062 case TP_HKEY_EV_ALARM_BAT_HOT: 4063 pr_crit("THERMAL ALARM: battery is too hot!\n"); 4064 /* recommended action: warn user through gui */ 4065 break; 4066 case TP_HKEY_EV_ALARM_BAT_XHOT: 4067 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 4068 /* recommended action: immediate sleep/hibernate */ 4069 break; 4070 case TP_HKEY_EV_ALARM_SENSOR_HOT: 4071 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n"); 4072 /* recommended action: warn user through gui, that */ 4073 /* some internal component is too hot */ 4074 break; 4075 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 4076 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n"); 4077 /* recommended action: immediate sleep/hibernate */ 4078 break; 4079 case TP_HKEY_EV_AC_CHANGED: 4080 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 4081 * AC status changed; can be triggered by plugging or 4082 * unplugging AC adapter, docking or undocking. */ 4083 4084 /* fallthrough */ 4085 4086 case TP_HKEY_EV_KEY_NUMLOCK: 4087 case TP_HKEY_EV_KEY_FN: 4088 case TP_HKEY_EV_KEY_FN_ESC: 4089 /* key press events, we just ignore them as long as the EC 4090 * is still reporting them in the normal keyboard stream */ 4091 *send_acpi_ev = false; 4092 *ignore_acpi_ev = true; 4093 return true; 4094 4095 case TP_HKEY_EV_TABLET_CHANGED: 4096 tpacpi_input_send_tabletsw(); 4097 hotkey_tablet_mode_notify_change(); 4098 *send_acpi_ev = false; 4099 return true; 4100 4101 case TP_HKEY_EV_PALM_DETECTED: 4102 case TP_HKEY_EV_PALM_UNDETECTED: 4103 /* palm detected hovering the keyboard, forward to user-space 4104 * via netlink for consumption */ 4105 return true; 4106 4107 default: 4108 /* report simply as unknown, no sensor dump */ 4109 return false; 4110 } 4111 4112 thermal_dump_all_sensors(); 4113 return true; 4114 } 4115 4116 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 4117 { 4118 u32 hkey; 4119 bool send_acpi_ev; 4120 bool ignore_acpi_ev; 4121 bool known_ev; 4122 4123 if (event != 0x80) { 4124 pr_err("unknown HKEY notification event %d\n", event); 4125 /* forward it to userspace, maybe it knows how to handle it */ 4126 acpi_bus_generate_netlink_event( 4127 ibm->acpi->device->pnp.device_class, 4128 dev_name(&ibm->acpi->device->dev), 4129 event, 0); 4130 return; 4131 } 4132 4133 while (1) { 4134 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 4135 pr_err("failed to retrieve HKEY event\n"); 4136 return; 4137 } 4138 4139 if (hkey == 0) { 4140 /* queue empty */ 4141 return; 4142 } 4143 4144 send_acpi_ev = true; 4145 ignore_acpi_ev = false; 4146 4147 switch (hkey >> 12) { 4148 case 1: 4149 /* 0x1000-0x1FFF: key presses */ 4150 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 4151 &ignore_acpi_ev); 4152 break; 4153 case 2: 4154 /* 0x2000-0x2FFF: Wakeup reason */ 4155 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 4156 &ignore_acpi_ev); 4157 break; 4158 case 3: 4159 /* 0x3000-0x3FFF: bay-related wakeups */ 4160 switch (hkey) { 4161 case TP_HKEY_EV_BAYEJ_ACK: 4162 hotkey_autosleep_ack = 1; 4163 pr_info("bay ejected\n"); 4164 hotkey_wakeup_hotunplug_complete_notify_change(); 4165 known_ev = true; 4166 break; 4167 case TP_HKEY_EV_OPTDRV_EJ: 4168 /* FIXME: kick libata if SATA link offline */ 4169 known_ev = true; 4170 break; 4171 default: 4172 known_ev = false; 4173 } 4174 break; 4175 case 4: 4176 /* 0x4000-0x4FFF: dock-related events */ 4177 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 4178 &ignore_acpi_ev); 4179 break; 4180 case 5: 4181 /* 0x5000-0x5FFF: human interface helpers */ 4182 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 4183 &ignore_acpi_ev); 4184 break; 4185 case 6: 4186 /* 0x6000-0x6FFF: thermal alarms/notices and 4187 * keyboard events */ 4188 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 4189 &ignore_acpi_ev); 4190 break; 4191 case 7: 4192 /* 0x7000-0x7FFF: misc */ 4193 if (tp_features.hotkey_wlsw && 4194 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 4195 tpacpi_send_radiosw_update(); 4196 send_acpi_ev = 0; 4197 known_ev = true; 4198 break; 4199 } 4200 /* fallthrough - to default */ 4201 default: 4202 known_ev = false; 4203 } 4204 if (!known_ev) { 4205 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4206 pr_notice("please report the conditions when this event happened to %s\n", 4207 TPACPI_MAIL); 4208 } 4209 4210 /* netlink events */ 4211 if (!ignore_acpi_ev && send_acpi_ev) { 4212 acpi_bus_generate_netlink_event( 4213 ibm->acpi->device->pnp.device_class, 4214 dev_name(&ibm->acpi->device->dev), 4215 event, hkey); 4216 } 4217 } 4218 } 4219 4220 static void hotkey_suspend(void) 4221 { 4222 /* Do these on suspend, we get the events on early resume! */ 4223 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4224 hotkey_autosleep_ack = 0; 4225 4226 /* save previous mode of adaptive keyboard of X1 Carbon */ 4227 if (tp_features.has_adaptive_kbd) { 4228 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4229 "GTRW", "dd", 0)) { 4230 pr_err("Cannot read adaptive keyboard mode.\n"); 4231 } 4232 } 4233 } 4234 4235 static void hotkey_resume(void) 4236 { 4237 tpacpi_disable_brightness_delay(); 4238 4239 if (hotkey_status_set(true) < 0 || 4240 hotkey_mask_set(hotkey_acpi_mask) < 0) 4241 pr_err("error while attempting to reset the event firmware interface\n"); 4242 4243 tpacpi_send_radiosw_update(); 4244 hotkey_tablet_mode_notify_change(); 4245 hotkey_wakeup_reason_notify_change(); 4246 hotkey_wakeup_hotunplug_complete_notify_change(); 4247 hotkey_poll_setup_safe(false); 4248 4249 /* restore previous mode of adapive keyboard of X1 Carbon */ 4250 if (tp_features.has_adaptive_kbd) { 4251 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4252 adaptive_keyboard_prev_mode)) { 4253 pr_err("Cannot set adaptive keyboard mode.\n"); 4254 } 4255 } 4256 } 4257 4258 /* procfs -------------------------------------------------------------- */ 4259 static int hotkey_read(struct seq_file *m) 4260 { 4261 int res, status; 4262 4263 if (!tp_features.hotkey) { 4264 seq_printf(m, "status:\t\tnot supported\n"); 4265 return 0; 4266 } 4267 4268 if (mutex_lock_killable(&hotkey_mutex)) 4269 return -ERESTARTSYS; 4270 res = hotkey_status_get(&status); 4271 if (!res) 4272 res = hotkey_mask_get(); 4273 mutex_unlock(&hotkey_mutex); 4274 if (res) 4275 return res; 4276 4277 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4278 if (hotkey_all_mask) { 4279 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4280 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4281 } else { 4282 seq_printf(m, "mask:\t\tnot supported\n"); 4283 seq_printf(m, "commands:\tenable, disable, reset\n"); 4284 } 4285 4286 return 0; 4287 } 4288 4289 static void hotkey_enabledisable_warn(bool enable) 4290 { 4291 tpacpi_log_usertask("procfs hotkey enable/disable"); 4292 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4293 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n"))) 4294 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n"); 4295 } 4296 4297 static int hotkey_write(char *buf) 4298 { 4299 int res; 4300 u32 mask; 4301 char *cmd; 4302 4303 if (!tp_features.hotkey) 4304 return -ENODEV; 4305 4306 if (mutex_lock_killable(&hotkey_mutex)) 4307 return -ERESTARTSYS; 4308 4309 mask = hotkey_user_mask; 4310 4311 res = 0; 4312 while ((cmd = next_cmd(&buf))) { 4313 if (strlencmp(cmd, "enable") == 0) { 4314 hotkey_enabledisable_warn(1); 4315 } else if (strlencmp(cmd, "disable") == 0) { 4316 hotkey_enabledisable_warn(0); 4317 res = -EPERM; 4318 } else if (strlencmp(cmd, "reset") == 0) { 4319 mask = (hotkey_all_mask | hotkey_source_mask) 4320 & ~hotkey_reserved_mask; 4321 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4322 /* mask set */ 4323 } else if (sscanf(cmd, "%x", &mask) == 1) { 4324 /* mask set */ 4325 } else { 4326 res = -EINVAL; 4327 goto errexit; 4328 } 4329 } 4330 4331 if (!res) { 4332 tpacpi_disclose_usertask("procfs hotkey", 4333 "set mask to 0x%08x\n", mask); 4334 res = hotkey_user_mask_set(mask); 4335 } 4336 4337 errexit: 4338 mutex_unlock(&hotkey_mutex); 4339 return res; 4340 } 4341 4342 static const struct acpi_device_id ibm_htk_device_ids[] = { 4343 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4344 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4345 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0}, 4346 {"", 0}, 4347 }; 4348 4349 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4350 .hid = ibm_htk_device_ids, 4351 .notify = hotkey_notify, 4352 .handle = &hkey_handle, 4353 .type = ACPI_DEVICE_NOTIFY, 4354 }; 4355 4356 static struct ibm_struct hotkey_driver_data = { 4357 .name = "hotkey", 4358 .read = hotkey_read, 4359 .write = hotkey_write, 4360 .exit = hotkey_exit, 4361 .resume = hotkey_resume, 4362 .suspend = hotkey_suspend, 4363 .acpi = &ibm_hotkey_acpidriver, 4364 }; 4365 4366 /************************************************************************* 4367 * Bluetooth subdriver 4368 */ 4369 4370 enum { 4371 /* ACPI GBDC/SBDC bits */ 4372 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4373 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4374 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4375 0 = disable, 1 = enable */ 4376 }; 4377 4378 enum { 4379 /* ACPI \BLTH commands */ 4380 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4381 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4382 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4383 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4384 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4385 }; 4386 4387 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4388 4389 static int bluetooth_get_status(void) 4390 { 4391 int status; 4392 4393 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4394 if (dbg_bluetoothemul) 4395 return (tpacpi_bluetooth_emulstate) ? 4396 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4397 #endif 4398 4399 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4400 return -EIO; 4401 4402 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4403 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4404 } 4405 4406 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4407 { 4408 int status; 4409 4410 vdbg_printk(TPACPI_DBG_RFKILL, 4411 "will attempt to %s bluetooth\n", 4412 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4413 4414 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4415 if (dbg_bluetoothemul) { 4416 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4417 return 0; 4418 } 4419 #endif 4420 4421 if (state == TPACPI_RFK_RADIO_ON) 4422 status = TP_ACPI_BLUETOOTH_RADIOSSW 4423 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4424 else 4425 status = 0; 4426 4427 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4428 return -EIO; 4429 4430 return 0; 4431 } 4432 4433 /* sysfs bluetooth enable ---------------------------------------------- */ 4434 static ssize_t bluetooth_enable_show(struct device *dev, 4435 struct device_attribute *attr, 4436 char *buf) 4437 { 4438 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4439 attr, buf); 4440 } 4441 4442 static ssize_t bluetooth_enable_store(struct device *dev, 4443 struct device_attribute *attr, 4444 const char *buf, size_t count) 4445 { 4446 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4447 attr, buf, count); 4448 } 4449 4450 static DEVICE_ATTR_RW(bluetooth_enable); 4451 4452 /* --------------------------------------------------------------------- */ 4453 4454 static struct attribute *bluetooth_attributes[] = { 4455 &dev_attr_bluetooth_enable.attr, 4456 NULL 4457 }; 4458 4459 static const struct attribute_group bluetooth_attr_group = { 4460 .attrs = bluetooth_attributes, 4461 }; 4462 4463 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4464 .get_status = bluetooth_get_status, 4465 .set_status = bluetooth_set_status, 4466 }; 4467 4468 static void bluetooth_shutdown(void) 4469 { 4470 /* Order firmware to save current state to NVRAM */ 4471 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4472 TP_ACPI_BLTH_SAVE_STATE)) 4473 pr_notice("failed to save bluetooth state to NVRAM\n"); 4474 else 4475 vdbg_printk(TPACPI_DBG_RFKILL, 4476 "bluetooth state saved to NVRAM\n"); 4477 } 4478 4479 static void bluetooth_exit(void) 4480 { 4481 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4482 &bluetooth_attr_group); 4483 4484 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4485 4486 bluetooth_shutdown(); 4487 } 4488 4489 static const struct dmi_system_id bt_fwbug_list[] __initconst = { 4490 { 4491 .ident = "ThinkPad E485", 4492 .matches = { 4493 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4494 DMI_MATCH(DMI_BOARD_NAME, "20KU"), 4495 }, 4496 }, 4497 { 4498 .ident = "ThinkPad E585", 4499 .matches = { 4500 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4501 DMI_MATCH(DMI_BOARD_NAME, "20KV"), 4502 }, 4503 }, 4504 { 4505 .ident = "ThinkPad A285 - 20MW", 4506 .matches = { 4507 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4508 DMI_MATCH(DMI_BOARD_NAME, "20MW"), 4509 }, 4510 }, 4511 { 4512 .ident = "ThinkPad A285 - 20MX", 4513 .matches = { 4514 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4515 DMI_MATCH(DMI_BOARD_NAME, "20MX"), 4516 }, 4517 }, 4518 { 4519 .ident = "ThinkPad A485 - 20MU", 4520 .matches = { 4521 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4522 DMI_MATCH(DMI_BOARD_NAME, "20MU"), 4523 }, 4524 }, 4525 { 4526 .ident = "ThinkPad A485 - 20MV", 4527 .matches = { 4528 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4529 DMI_MATCH(DMI_BOARD_NAME, "20MV"), 4530 }, 4531 }, 4532 {} 4533 }; 4534 4535 static const struct pci_device_id fwbug_cards_ids[] __initconst = { 4536 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) }, 4537 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) }, 4538 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) }, 4539 {} 4540 }; 4541 4542 4543 static int __init have_bt_fwbug(void) 4544 { 4545 /* 4546 * Some AMD based ThinkPads have a firmware bug that calling 4547 * "GBDC" will cause bluetooth on Intel wireless cards blocked 4548 */ 4549 if (dmi_check_system(bt_fwbug_list) && pci_dev_present(fwbug_cards_ids)) { 4550 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4551 FW_BUG "disable bluetooth subdriver for Intel cards\n"); 4552 return 1; 4553 } else 4554 return 0; 4555 } 4556 4557 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4558 { 4559 int res; 4560 int status = 0; 4561 4562 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4563 "initializing bluetooth subdriver\n"); 4564 4565 TPACPI_ACPIHANDLE_INIT(hkey); 4566 4567 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4568 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4569 tp_features.bluetooth = !have_bt_fwbug() && hkey_handle && 4570 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4571 4572 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4573 "bluetooth is %s, status 0x%02x\n", 4574 str_supported(tp_features.bluetooth), 4575 status); 4576 4577 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4578 if (dbg_bluetoothemul) { 4579 tp_features.bluetooth = 1; 4580 pr_info("bluetooth switch emulation enabled\n"); 4581 } else 4582 #endif 4583 if (tp_features.bluetooth && 4584 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4585 /* no bluetooth hardware present in system */ 4586 tp_features.bluetooth = 0; 4587 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4588 "bluetooth hardware not installed\n"); 4589 } 4590 4591 if (!tp_features.bluetooth) 4592 return 1; 4593 4594 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4595 &bluetooth_tprfk_ops, 4596 RFKILL_TYPE_BLUETOOTH, 4597 TPACPI_RFK_BLUETOOTH_SW_NAME, 4598 true); 4599 if (res) 4600 return res; 4601 4602 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4603 &bluetooth_attr_group); 4604 if (res) { 4605 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4606 return res; 4607 } 4608 4609 return 0; 4610 } 4611 4612 /* procfs -------------------------------------------------------------- */ 4613 static int bluetooth_read(struct seq_file *m) 4614 { 4615 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4616 } 4617 4618 static int bluetooth_write(char *buf) 4619 { 4620 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4621 } 4622 4623 static struct ibm_struct bluetooth_driver_data = { 4624 .name = "bluetooth", 4625 .read = bluetooth_read, 4626 .write = bluetooth_write, 4627 .exit = bluetooth_exit, 4628 .shutdown = bluetooth_shutdown, 4629 }; 4630 4631 /************************************************************************* 4632 * Wan subdriver 4633 */ 4634 4635 enum { 4636 /* ACPI GWAN/SWAN bits */ 4637 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4638 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4639 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4640 0 = disable, 1 = enable */ 4641 }; 4642 4643 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4644 4645 static int wan_get_status(void) 4646 { 4647 int status; 4648 4649 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4650 if (dbg_wwanemul) 4651 return (tpacpi_wwan_emulstate) ? 4652 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4653 #endif 4654 4655 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4656 return -EIO; 4657 4658 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4659 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4660 } 4661 4662 static int wan_set_status(enum tpacpi_rfkill_state state) 4663 { 4664 int status; 4665 4666 vdbg_printk(TPACPI_DBG_RFKILL, 4667 "will attempt to %s wwan\n", 4668 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4669 4670 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4671 if (dbg_wwanemul) { 4672 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4673 return 0; 4674 } 4675 #endif 4676 4677 if (state == TPACPI_RFK_RADIO_ON) 4678 status = TP_ACPI_WANCARD_RADIOSSW 4679 | TP_ACPI_WANCARD_RESUMECTRL; 4680 else 4681 status = 0; 4682 4683 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4684 return -EIO; 4685 4686 return 0; 4687 } 4688 4689 /* sysfs wan enable ---------------------------------------------------- */ 4690 static ssize_t wan_enable_show(struct device *dev, 4691 struct device_attribute *attr, 4692 char *buf) 4693 { 4694 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4695 attr, buf); 4696 } 4697 4698 static ssize_t wan_enable_store(struct device *dev, 4699 struct device_attribute *attr, 4700 const char *buf, size_t count) 4701 { 4702 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4703 attr, buf, count); 4704 } 4705 4706 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4707 wan_enable_show, wan_enable_store); 4708 4709 /* --------------------------------------------------------------------- */ 4710 4711 static struct attribute *wan_attributes[] = { 4712 &dev_attr_wwan_enable.attr, 4713 NULL 4714 }; 4715 4716 static const struct attribute_group wan_attr_group = { 4717 .attrs = wan_attributes, 4718 }; 4719 4720 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4721 .get_status = wan_get_status, 4722 .set_status = wan_set_status, 4723 }; 4724 4725 static void wan_shutdown(void) 4726 { 4727 /* Order firmware to save current state to NVRAM */ 4728 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4729 TP_ACPI_WGSV_SAVE_STATE)) 4730 pr_notice("failed to save WWAN state to NVRAM\n"); 4731 else 4732 vdbg_printk(TPACPI_DBG_RFKILL, 4733 "WWAN state saved to NVRAM\n"); 4734 } 4735 4736 static void wan_exit(void) 4737 { 4738 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4739 &wan_attr_group); 4740 4741 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4742 4743 wan_shutdown(); 4744 } 4745 4746 static int __init wan_init(struct ibm_init_struct *iibm) 4747 { 4748 int res; 4749 int status = 0; 4750 4751 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4752 "initializing wan subdriver\n"); 4753 4754 TPACPI_ACPIHANDLE_INIT(hkey); 4755 4756 tp_features.wan = hkey_handle && 4757 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4758 4759 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4760 "wan is %s, status 0x%02x\n", 4761 str_supported(tp_features.wan), 4762 status); 4763 4764 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4765 if (dbg_wwanemul) { 4766 tp_features.wan = 1; 4767 pr_info("wwan switch emulation enabled\n"); 4768 } else 4769 #endif 4770 if (tp_features.wan && 4771 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4772 /* no wan hardware present in system */ 4773 tp_features.wan = 0; 4774 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4775 "wan hardware not installed\n"); 4776 } 4777 4778 if (!tp_features.wan) 4779 return 1; 4780 4781 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4782 &wan_tprfk_ops, 4783 RFKILL_TYPE_WWAN, 4784 TPACPI_RFK_WWAN_SW_NAME, 4785 true); 4786 if (res) 4787 return res; 4788 4789 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4790 &wan_attr_group); 4791 4792 if (res) { 4793 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4794 return res; 4795 } 4796 4797 return 0; 4798 } 4799 4800 /* procfs -------------------------------------------------------------- */ 4801 static int wan_read(struct seq_file *m) 4802 { 4803 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4804 } 4805 4806 static int wan_write(char *buf) 4807 { 4808 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4809 } 4810 4811 static struct ibm_struct wan_driver_data = { 4812 .name = "wan", 4813 .read = wan_read, 4814 .write = wan_write, 4815 .exit = wan_exit, 4816 .shutdown = wan_shutdown, 4817 }; 4818 4819 /************************************************************************* 4820 * UWB subdriver 4821 */ 4822 4823 enum { 4824 /* ACPI GUWB/SUWB bits */ 4825 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4826 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4827 }; 4828 4829 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4830 4831 static int uwb_get_status(void) 4832 { 4833 int status; 4834 4835 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4836 if (dbg_uwbemul) 4837 return (tpacpi_uwb_emulstate) ? 4838 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4839 #endif 4840 4841 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4842 return -EIO; 4843 4844 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4845 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4846 } 4847 4848 static int uwb_set_status(enum tpacpi_rfkill_state state) 4849 { 4850 int status; 4851 4852 vdbg_printk(TPACPI_DBG_RFKILL, 4853 "will attempt to %s UWB\n", 4854 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4855 4856 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4857 if (dbg_uwbemul) { 4858 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4859 return 0; 4860 } 4861 #endif 4862 4863 if (state == TPACPI_RFK_RADIO_ON) 4864 status = TP_ACPI_UWB_RADIOSSW; 4865 else 4866 status = 0; 4867 4868 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4869 return -EIO; 4870 4871 return 0; 4872 } 4873 4874 /* --------------------------------------------------------------------- */ 4875 4876 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4877 .get_status = uwb_get_status, 4878 .set_status = uwb_set_status, 4879 }; 4880 4881 static void uwb_exit(void) 4882 { 4883 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4884 } 4885 4886 static int __init uwb_init(struct ibm_init_struct *iibm) 4887 { 4888 int res; 4889 int status = 0; 4890 4891 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4892 "initializing uwb subdriver\n"); 4893 4894 TPACPI_ACPIHANDLE_INIT(hkey); 4895 4896 tp_features.uwb = hkey_handle && 4897 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4898 4899 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4900 "uwb is %s, status 0x%02x\n", 4901 str_supported(tp_features.uwb), 4902 status); 4903 4904 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4905 if (dbg_uwbemul) { 4906 tp_features.uwb = 1; 4907 pr_info("uwb switch emulation enabled\n"); 4908 } else 4909 #endif 4910 if (tp_features.uwb && 4911 !(status & TP_ACPI_UWB_HWPRESENT)) { 4912 /* no uwb hardware present in system */ 4913 tp_features.uwb = 0; 4914 dbg_printk(TPACPI_DBG_INIT, 4915 "uwb hardware not installed\n"); 4916 } 4917 4918 if (!tp_features.uwb) 4919 return 1; 4920 4921 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4922 &uwb_tprfk_ops, 4923 RFKILL_TYPE_UWB, 4924 TPACPI_RFK_UWB_SW_NAME, 4925 false); 4926 return res; 4927 } 4928 4929 static struct ibm_struct uwb_driver_data = { 4930 .name = "uwb", 4931 .exit = uwb_exit, 4932 .flags.experimental = 1, 4933 }; 4934 4935 /************************************************************************* 4936 * Video subdriver 4937 */ 4938 4939 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4940 4941 enum video_access_mode { 4942 TPACPI_VIDEO_NONE = 0, 4943 TPACPI_VIDEO_570, /* 570 */ 4944 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4945 TPACPI_VIDEO_NEW, /* all others */ 4946 }; 4947 4948 enum { /* video status flags, based on VIDEO_570 */ 4949 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4950 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4951 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4952 }; 4953 4954 enum { /* TPACPI_VIDEO_570 constants */ 4955 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4956 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4957 * video_status_flags */ 4958 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4959 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4960 }; 4961 4962 static enum video_access_mode video_supported; 4963 static int video_orig_autosw; 4964 4965 static int video_autosw_get(void); 4966 static int video_autosw_set(int enable); 4967 4968 TPACPI_HANDLE(vid, root, 4969 "\\_SB.PCI.AGP.VGA", /* 570 */ 4970 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4971 "\\_SB.PCI0.VID0", /* 770e */ 4972 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4973 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4974 "\\_SB.PCI0.AGP.VID", /* all others */ 4975 ); /* R30, R31 */ 4976 4977 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4978 4979 static int __init video_init(struct ibm_init_struct *iibm) 4980 { 4981 int ivga; 4982 4983 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4984 4985 TPACPI_ACPIHANDLE_INIT(vid); 4986 if (tpacpi_is_ibm()) 4987 TPACPI_ACPIHANDLE_INIT(vid2); 4988 4989 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4990 /* G41, assume IVGA doesn't change */ 4991 vid_handle = vid2_handle; 4992 4993 if (!vid_handle) 4994 /* video switching not supported on R30, R31 */ 4995 video_supported = TPACPI_VIDEO_NONE; 4996 else if (tpacpi_is_ibm() && 4997 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4998 /* 570 */ 4999 video_supported = TPACPI_VIDEO_570; 5000 else if (tpacpi_is_ibm() && 5001 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 5002 /* 600e/x, 770e, 770x */ 5003 video_supported = TPACPI_VIDEO_770; 5004 else 5005 /* all others */ 5006 video_supported = TPACPI_VIDEO_NEW; 5007 5008 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 5009 str_supported(video_supported != TPACPI_VIDEO_NONE), 5010 video_supported); 5011 5012 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 5013 } 5014 5015 static void video_exit(void) 5016 { 5017 dbg_printk(TPACPI_DBG_EXIT, 5018 "restoring original video autoswitch mode\n"); 5019 if (video_autosw_set(video_orig_autosw)) 5020 pr_err("error while trying to restore original video autoswitch mode\n"); 5021 } 5022 5023 static int video_outputsw_get(void) 5024 { 5025 int status = 0; 5026 int i; 5027 5028 switch (video_supported) { 5029 case TPACPI_VIDEO_570: 5030 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 5031 TP_ACPI_VIDEO_570_PHSCMD)) 5032 return -EIO; 5033 status = i & TP_ACPI_VIDEO_570_PHSMASK; 5034 break; 5035 case TPACPI_VIDEO_770: 5036 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 5037 return -EIO; 5038 if (i) 5039 status |= TP_ACPI_VIDEO_S_LCD; 5040 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 5041 return -EIO; 5042 if (i) 5043 status |= TP_ACPI_VIDEO_S_CRT; 5044 break; 5045 case TPACPI_VIDEO_NEW: 5046 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 5047 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 5048 return -EIO; 5049 if (i) 5050 status |= TP_ACPI_VIDEO_S_CRT; 5051 5052 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 5053 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 5054 return -EIO; 5055 if (i) 5056 status |= TP_ACPI_VIDEO_S_LCD; 5057 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 5058 return -EIO; 5059 if (i) 5060 status |= TP_ACPI_VIDEO_S_DVI; 5061 break; 5062 default: 5063 return -ENOSYS; 5064 } 5065 5066 return status; 5067 } 5068 5069 static int video_outputsw_set(int status) 5070 { 5071 int autosw; 5072 int res = 0; 5073 5074 switch (video_supported) { 5075 case TPACPI_VIDEO_570: 5076 res = acpi_evalf(NULL, NULL, 5077 "\\_SB.PHS2", "vdd", 5078 TP_ACPI_VIDEO_570_PHS2CMD, 5079 status | TP_ACPI_VIDEO_570_PHS2SET); 5080 break; 5081 case TPACPI_VIDEO_770: 5082 autosw = video_autosw_get(); 5083 if (autosw < 0) 5084 return autosw; 5085 5086 res = video_autosw_set(1); 5087 if (res) 5088 return res; 5089 res = acpi_evalf(vid_handle, NULL, 5090 "ASWT", "vdd", status * 0x100, 0); 5091 if (!autosw && video_autosw_set(autosw)) { 5092 pr_err("video auto-switch left enabled due to error\n"); 5093 return -EIO; 5094 } 5095 break; 5096 case TPACPI_VIDEO_NEW: 5097 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 5098 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 5099 break; 5100 default: 5101 return -ENOSYS; 5102 } 5103 5104 return (res) ? 0 : -EIO; 5105 } 5106 5107 static int video_autosw_get(void) 5108 { 5109 int autosw = 0; 5110 5111 switch (video_supported) { 5112 case TPACPI_VIDEO_570: 5113 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 5114 return -EIO; 5115 break; 5116 case TPACPI_VIDEO_770: 5117 case TPACPI_VIDEO_NEW: 5118 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 5119 return -EIO; 5120 break; 5121 default: 5122 return -ENOSYS; 5123 } 5124 5125 return autosw & 1; 5126 } 5127 5128 static int video_autosw_set(int enable) 5129 { 5130 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 5131 return -EIO; 5132 return 0; 5133 } 5134 5135 static int video_outputsw_cycle(void) 5136 { 5137 int autosw = video_autosw_get(); 5138 int res; 5139 5140 if (autosw < 0) 5141 return autosw; 5142 5143 switch (video_supported) { 5144 case TPACPI_VIDEO_570: 5145 res = video_autosw_set(1); 5146 if (res) 5147 return res; 5148 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 5149 break; 5150 case TPACPI_VIDEO_770: 5151 case TPACPI_VIDEO_NEW: 5152 res = video_autosw_set(1); 5153 if (res) 5154 return res; 5155 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 5156 break; 5157 default: 5158 return -ENOSYS; 5159 } 5160 if (!autosw && video_autosw_set(autosw)) { 5161 pr_err("video auto-switch left enabled due to error\n"); 5162 return -EIO; 5163 } 5164 5165 return (res) ? 0 : -EIO; 5166 } 5167 5168 static int video_expand_toggle(void) 5169 { 5170 switch (video_supported) { 5171 case TPACPI_VIDEO_570: 5172 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 5173 0 : -EIO; 5174 case TPACPI_VIDEO_770: 5175 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 5176 0 : -EIO; 5177 case TPACPI_VIDEO_NEW: 5178 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 5179 0 : -EIO; 5180 default: 5181 return -ENOSYS; 5182 } 5183 /* not reached */ 5184 } 5185 5186 static int video_read(struct seq_file *m) 5187 { 5188 int status, autosw; 5189 5190 if (video_supported == TPACPI_VIDEO_NONE) { 5191 seq_printf(m, "status:\t\tnot supported\n"); 5192 return 0; 5193 } 5194 5195 /* Even reads can crash X.org, so... */ 5196 if (!capable(CAP_SYS_ADMIN)) 5197 return -EPERM; 5198 5199 status = video_outputsw_get(); 5200 if (status < 0) 5201 return status; 5202 5203 autosw = video_autosw_get(); 5204 if (autosw < 0) 5205 return autosw; 5206 5207 seq_printf(m, "status:\t\tsupported\n"); 5208 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 5209 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 5210 if (video_supported == TPACPI_VIDEO_NEW) 5211 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 5212 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 5213 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5214 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5215 if (video_supported == TPACPI_VIDEO_NEW) 5216 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5217 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5218 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5219 5220 return 0; 5221 } 5222 5223 static int video_write(char *buf) 5224 { 5225 char *cmd; 5226 int enable, disable, status; 5227 int res; 5228 5229 if (video_supported == TPACPI_VIDEO_NONE) 5230 return -ENODEV; 5231 5232 /* Even reads can crash X.org, let alone writes... */ 5233 if (!capable(CAP_SYS_ADMIN)) 5234 return -EPERM; 5235 5236 enable = 0; 5237 disable = 0; 5238 5239 while ((cmd = next_cmd(&buf))) { 5240 if (strlencmp(cmd, "lcd_enable") == 0) { 5241 enable |= TP_ACPI_VIDEO_S_LCD; 5242 } else if (strlencmp(cmd, "lcd_disable") == 0) { 5243 disable |= TP_ACPI_VIDEO_S_LCD; 5244 } else if (strlencmp(cmd, "crt_enable") == 0) { 5245 enable |= TP_ACPI_VIDEO_S_CRT; 5246 } else if (strlencmp(cmd, "crt_disable") == 0) { 5247 disable |= TP_ACPI_VIDEO_S_CRT; 5248 } else if (video_supported == TPACPI_VIDEO_NEW && 5249 strlencmp(cmd, "dvi_enable") == 0) { 5250 enable |= TP_ACPI_VIDEO_S_DVI; 5251 } else if (video_supported == TPACPI_VIDEO_NEW && 5252 strlencmp(cmd, "dvi_disable") == 0) { 5253 disable |= TP_ACPI_VIDEO_S_DVI; 5254 } else if (strlencmp(cmd, "auto_enable") == 0) { 5255 res = video_autosw_set(1); 5256 if (res) 5257 return res; 5258 } else if (strlencmp(cmd, "auto_disable") == 0) { 5259 res = video_autosw_set(0); 5260 if (res) 5261 return res; 5262 } else if (strlencmp(cmd, "video_switch") == 0) { 5263 res = video_outputsw_cycle(); 5264 if (res) 5265 return res; 5266 } else if (strlencmp(cmd, "expand_toggle") == 0) { 5267 res = video_expand_toggle(); 5268 if (res) 5269 return res; 5270 } else 5271 return -EINVAL; 5272 } 5273 5274 if (enable || disable) { 5275 status = video_outputsw_get(); 5276 if (status < 0) 5277 return status; 5278 res = video_outputsw_set((status & ~disable) | enable); 5279 if (res) 5280 return res; 5281 } 5282 5283 return 0; 5284 } 5285 5286 static struct ibm_struct video_driver_data = { 5287 .name = "video", 5288 .read = video_read, 5289 .write = video_write, 5290 .exit = video_exit, 5291 }; 5292 5293 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5294 5295 /************************************************************************* 5296 * Keyboard backlight subdriver 5297 */ 5298 5299 static enum led_brightness kbdlight_brightness; 5300 static DEFINE_MUTEX(kbdlight_mutex); 5301 5302 static int kbdlight_set_level(int level) 5303 { 5304 int ret = 0; 5305 5306 if (!hkey_handle) 5307 return -ENXIO; 5308 5309 mutex_lock(&kbdlight_mutex); 5310 5311 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5312 ret = -EIO; 5313 else 5314 kbdlight_brightness = level; 5315 5316 mutex_unlock(&kbdlight_mutex); 5317 5318 return ret; 5319 } 5320 5321 static int kbdlight_get_level(void) 5322 { 5323 int status = 0; 5324 5325 if (!hkey_handle) 5326 return -ENXIO; 5327 5328 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5329 return -EIO; 5330 5331 if (status < 0) 5332 return status; 5333 5334 return status & 0x3; 5335 } 5336 5337 static bool kbdlight_is_supported(void) 5338 { 5339 int status = 0; 5340 5341 if (!hkey_handle) 5342 return false; 5343 5344 if (!acpi_has_method(hkey_handle, "MLCG")) { 5345 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5346 return false; 5347 } 5348 5349 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5350 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5351 return false; 5352 } 5353 5354 if (status < 0) { 5355 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5356 return false; 5357 } 5358 5359 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5360 /* 5361 * Guessed test for keyboard backlight: 5362 * 5363 * Machines with backlight keyboard return: 5364 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5365 * b110100010010000000XX - ThinkPad x230 5366 * b010100000010000000XX - ThinkPad x240 5367 * b010100000010000000XX - ThinkPad W541 5368 * (XX is current backlight level) 5369 * 5370 * Machines without backlight keyboard return: 5371 * b10100001000000000000 - ThinkPad x230 5372 * b10110001000000000000 - ThinkPad E430 5373 * b00000000000000000000 - ThinkPad E450 5374 * 5375 * Candidate BITs for detection test (XOR): 5376 * b01000000001000000000 5377 * ^ 5378 */ 5379 return status & BIT(9); 5380 } 5381 5382 static int kbdlight_sysfs_set(struct led_classdev *led_cdev, 5383 enum led_brightness brightness) 5384 { 5385 return kbdlight_set_level(brightness); 5386 } 5387 5388 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5389 { 5390 int level; 5391 5392 level = kbdlight_get_level(); 5393 if (level < 0) 5394 return 0; 5395 5396 return level; 5397 } 5398 5399 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5400 .led_classdev = { 5401 .name = "tpacpi::kbd_backlight", 5402 .max_brightness = 2, 5403 .flags = LED_BRIGHT_HW_CHANGED, 5404 .brightness_set_blocking = &kbdlight_sysfs_set, 5405 .brightness_get = &kbdlight_sysfs_get, 5406 } 5407 }; 5408 5409 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5410 { 5411 int rc; 5412 5413 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5414 5415 TPACPI_ACPIHANDLE_INIT(hkey); 5416 5417 if (!kbdlight_is_supported()) { 5418 tp_features.kbdlight = 0; 5419 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5420 return 1; 5421 } 5422 5423 kbdlight_brightness = kbdlight_sysfs_get(NULL); 5424 tp_features.kbdlight = 1; 5425 5426 rc = led_classdev_register(&tpacpi_pdev->dev, 5427 &tpacpi_led_kbdlight.led_classdev); 5428 if (rc < 0) { 5429 tp_features.kbdlight = 0; 5430 return rc; 5431 } 5432 5433 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask | 5434 TP_ACPI_HKEY_KBD_LIGHT_MASK); 5435 return 0; 5436 } 5437 5438 static void kbdlight_exit(void) 5439 { 5440 if (tp_features.kbdlight) 5441 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5442 } 5443 5444 static int kbdlight_set_level_and_update(int level) 5445 { 5446 int ret; 5447 struct led_classdev *led_cdev; 5448 5449 ret = kbdlight_set_level(level); 5450 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5451 5452 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5453 led_cdev->brightness = level; 5454 5455 return ret; 5456 } 5457 5458 static int kbdlight_read(struct seq_file *m) 5459 { 5460 int level; 5461 5462 if (!tp_features.kbdlight) { 5463 seq_printf(m, "status:\t\tnot supported\n"); 5464 } else { 5465 level = kbdlight_get_level(); 5466 if (level < 0) 5467 seq_printf(m, "status:\t\terror %d\n", level); 5468 else 5469 seq_printf(m, "status:\t\t%d\n", level); 5470 seq_printf(m, "commands:\t0, 1, 2\n"); 5471 } 5472 5473 return 0; 5474 } 5475 5476 static int kbdlight_write(char *buf) 5477 { 5478 char *cmd; 5479 int level = -1; 5480 5481 if (!tp_features.kbdlight) 5482 return -ENODEV; 5483 5484 while ((cmd = next_cmd(&buf))) { 5485 if (strlencmp(cmd, "0") == 0) 5486 level = 0; 5487 else if (strlencmp(cmd, "1") == 0) 5488 level = 1; 5489 else if (strlencmp(cmd, "2") == 0) 5490 level = 2; 5491 else 5492 return -EINVAL; 5493 } 5494 5495 if (level == -1) 5496 return -EINVAL; 5497 5498 return kbdlight_set_level_and_update(level); 5499 } 5500 5501 static void kbdlight_suspend(void) 5502 { 5503 struct led_classdev *led_cdev; 5504 5505 if (!tp_features.kbdlight) 5506 return; 5507 5508 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5509 led_update_brightness(led_cdev); 5510 led_classdev_suspend(led_cdev); 5511 } 5512 5513 static void kbdlight_resume(void) 5514 { 5515 if (!tp_features.kbdlight) 5516 return; 5517 5518 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5519 } 5520 5521 static struct ibm_struct kbdlight_driver_data = { 5522 .name = "kbdlight", 5523 .read = kbdlight_read, 5524 .write = kbdlight_write, 5525 .suspend = kbdlight_suspend, 5526 .resume = kbdlight_resume, 5527 .exit = kbdlight_exit, 5528 }; 5529 5530 /************************************************************************* 5531 * Light (thinklight) subdriver 5532 */ 5533 5534 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5535 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5536 5537 static int light_get_status(void) 5538 { 5539 int status = 0; 5540 5541 if (tp_features.light_status) { 5542 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5543 return -EIO; 5544 return (!!status); 5545 } 5546 5547 return -ENXIO; 5548 } 5549 5550 static int light_set_status(int status) 5551 { 5552 int rc; 5553 5554 if (tp_features.light) { 5555 if (cmos_handle) { 5556 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5557 (status) ? 5558 TP_CMOS_THINKLIGHT_ON : 5559 TP_CMOS_THINKLIGHT_OFF); 5560 } else { 5561 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5562 (status) ? 1 : 0); 5563 } 5564 return (rc) ? 0 : -EIO; 5565 } 5566 5567 return -ENXIO; 5568 } 5569 5570 static int light_sysfs_set(struct led_classdev *led_cdev, 5571 enum led_brightness brightness) 5572 { 5573 return light_set_status((brightness != LED_OFF) ? 5574 TPACPI_LED_ON : TPACPI_LED_OFF); 5575 } 5576 5577 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5578 { 5579 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5580 } 5581 5582 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5583 .led_classdev = { 5584 .name = "tpacpi::thinklight", 5585 .brightness_set_blocking = &light_sysfs_set, 5586 .brightness_get = &light_sysfs_get, 5587 } 5588 }; 5589 5590 static int __init light_init(struct ibm_init_struct *iibm) 5591 { 5592 int rc; 5593 5594 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5595 5596 if (tpacpi_is_ibm()) { 5597 TPACPI_ACPIHANDLE_INIT(ledb); 5598 TPACPI_ACPIHANDLE_INIT(lght); 5599 } 5600 TPACPI_ACPIHANDLE_INIT(cmos); 5601 5602 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5603 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5604 5605 if (tp_features.light) 5606 /* light status not supported on 5607 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5608 tp_features.light_status = 5609 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5610 5611 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5612 str_supported(tp_features.light), 5613 str_supported(tp_features.light_status)); 5614 5615 if (!tp_features.light) 5616 return 1; 5617 5618 rc = led_classdev_register(&tpacpi_pdev->dev, 5619 &tpacpi_led_thinklight.led_classdev); 5620 5621 if (rc < 0) { 5622 tp_features.light = 0; 5623 tp_features.light_status = 0; 5624 } else { 5625 rc = 0; 5626 } 5627 5628 return rc; 5629 } 5630 5631 static void light_exit(void) 5632 { 5633 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5634 } 5635 5636 static int light_read(struct seq_file *m) 5637 { 5638 int status; 5639 5640 if (!tp_features.light) { 5641 seq_printf(m, "status:\t\tnot supported\n"); 5642 } else if (!tp_features.light_status) { 5643 seq_printf(m, "status:\t\tunknown\n"); 5644 seq_printf(m, "commands:\ton, off\n"); 5645 } else { 5646 status = light_get_status(); 5647 if (status < 0) 5648 return status; 5649 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5650 seq_printf(m, "commands:\ton, off\n"); 5651 } 5652 5653 return 0; 5654 } 5655 5656 static int light_write(char *buf) 5657 { 5658 char *cmd; 5659 int newstatus = 0; 5660 5661 if (!tp_features.light) 5662 return -ENODEV; 5663 5664 while ((cmd = next_cmd(&buf))) { 5665 if (strlencmp(cmd, "on") == 0) { 5666 newstatus = 1; 5667 } else if (strlencmp(cmd, "off") == 0) { 5668 newstatus = 0; 5669 } else 5670 return -EINVAL; 5671 } 5672 5673 return light_set_status(newstatus); 5674 } 5675 5676 static struct ibm_struct light_driver_data = { 5677 .name = "light", 5678 .read = light_read, 5679 .write = light_write, 5680 .exit = light_exit, 5681 }; 5682 5683 /************************************************************************* 5684 * CMOS subdriver 5685 */ 5686 5687 /* sysfs cmos_command -------------------------------------------------- */ 5688 static ssize_t cmos_command_store(struct device *dev, 5689 struct device_attribute *attr, 5690 const char *buf, size_t count) 5691 { 5692 unsigned long cmos_cmd; 5693 int res; 5694 5695 if (parse_strtoul(buf, 21, &cmos_cmd)) 5696 return -EINVAL; 5697 5698 res = issue_thinkpad_cmos_command(cmos_cmd); 5699 return (res) ? res : count; 5700 } 5701 5702 static DEVICE_ATTR_WO(cmos_command); 5703 5704 /* --------------------------------------------------------------------- */ 5705 5706 static int __init cmos_init(struct ibm_init_struct *iibm) 5707 { 5708 int res; 5709 5710 vdbg_printk(TPACPI_DBG_INIT, 5711 "initializing cmos commands subdriver\n"); 5712 5713 TPACPI_ACPIHANDLE_INIT(cmos); 5714 5715 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5716 str_supported(cmos_handle != NULL)); 5717 5718 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5719 if (res) 5720 return res; 5721 5722 return (cmos_handle) ? 0 : 1; 5723 } 5724 5725 static void cmos_exit(void) 5726 { 5727 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5728 } 5729 5730 static int cmos_read(struct seq_file *m) 5731 { 5732 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5733 R30, R31, T20-22, X20-21 */ 5734 if (!cmos_handle) 5735 seq_printf(m, "status:\t\tnot supported\n"); 5736 else { 5737 seq_printf(m, "status:\t\tsupported\n"); 5738 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5739 } 5740 5741 return 0; 5742 } 5743 5744 static int cmos_write(char *buf) 5745 { 5746 char *cmd; 5747 int cmos_cmd, res; 5748 5749 while ((cmd = next_cmd(&buf))) { 5750 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5751 cmos_cmd >= 0 && cmos_cmd <= 21) { 5752 /* cmos_cmd set */ 5753 } else 5754 return -EINVAL; 5755 5756 res = issue_thinkpad_cmos_command(cmos_cmd); 5757 if (res) 5758 return res; 5759 } 5760 5761 return 0; 5762 } 5763 5764 static struct ibm_struct cmos_driver_data = { 5765 .name = "cmos", 5766 .read = cmos_read, 5767 .write = cmos_write, 5768 .exit = cmos_exit, 5769 }; 5770 5771 /************************************************************************* 5772 * LED subdriver 5773 */ 5774 5775 enum led_access_mode { 5776 TPACPI_LED_NONE = 0, 5777 TPACPI_LED_570, /* 570 */ 5778 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5779 TPACPI_LED_NEW, /* all others */ 5780 }; 5781 5782 enum { /* For TPACPI_LED_OLD */ 5783 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5784 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5785 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5786 }; 5787 5788 static enum led_access_mode led_supported; 5789 5790 static acpi_handle led_handle; 5791 5792 #define TPACPI_LED_NUMLEDS 16 5793 static struct tpacpi_led_classdev *tpacpi_leds; 5794 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5795 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5796 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5797 "tpacpi::power", 5798 "tpacpi:orange:batt", 5799 "tpacpi:green:batt", 5800 "tpacpi::dock_active", 5801 "tpacpi::bay_active", 5802 "tpacpi::dock_batt", 5803 "tpacpi::unknown_led", 5804 "tpacpi::standby", 5805 "tpacpi::dock_status1", 5806 "tpacpi::dock_status2", 5807 "tpacpi::unknown_led2", 5808 "tpacpi::unknown_led3", 5809 "tpacpi::thinkvantage", 5810 }; 5811 #define TPACPI_SAFE_LEDS 0x1081U 5812 5813 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5814 { 5815 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5816 return false; 5817 #else 5818 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5819 #endif 5820 } 5821 5822 static int led_get_status(const unsigned int led) 5823 { 5824 int status; 5825 enum led_status_t led_s; 5826 5827 switch (led_supported) { 5828 case TPACPI_LED_570: 5829 if (!acpi_evalf(ec_handle, 5830 &status, "GLED", "dd", 1 << led)) 5831 return -EIO; 5832 led_s = (status == 0) ? 5833 TPACPI_LED_OFF : 5834 ((status == 1) ? 5835 TPACPI_LED_ON : 5836 TPACPI_LED_BLINK); 5837 tpacpi_led_state_cache[led] = led_s; 5838 return led_s; 5839 default: 5840 return -ENXIO; 5841 } 5842 5843 /* not reached */ 5844 } 5845 5846 static int led_set_status(const unsigned int led, 5847 const enum led_status_t ledstatus) 5848 { 5849 /* off, on, blink. Index is led_status_t */ 5850 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5851 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5852 5853 int rc = 0; 5854 5855 switch (led_supported) { 5856 case TPACPI_LED_570: 5857 /* 570 */ 5858 if (unlikely(led > 7)) 5859 return -EINVAL; 5860 if (unlikely(tpacpi_is_led_restricted(led))) 5861 return -EPERM; 5862 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5863 (1 << led), led_sled_arg1[ledstatus])) 5864 return -EIO; 5865 break; 5866 case TPACPI_LED_OLD: 5867 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5868 if (unlikely(led > 7)) 5869 return -EINVAL; 5870 if (unlikely(tpacpi_is_led_restricted(led))) 5871 return -EPERM; 5872 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5873 if (rc >= 0) 5874 rc = ec_write(TPACPI_LED_EC_HLBL, 5875 (ledstatus == TPACPI_LED_BLINK) << led); 5876 if (rc >= 0) 5877 rc = ec_write(TPACPI_LED_EC_HLCL, 5878 (ledstatus != TPACPI_LED_OFF) << led); 5879 break; 5880 case TPACPI_LED_NEW: 5881 /* all others */ 5882 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5883 return -EINVAL; 5884 if (unlikely(tpacpi_is_led_restricted(led))) 5885 return -EPERM; 5886 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5887 led, led_led_arg1[ledstatus])) 5888 return -EIO; 5889 break; 5890 default: 5891 return -ENXIO; 5892 } 5893 5894 if (!rc) 5895 tpacpi_led_state_cache[led] = ledstatus; 5896 5897 return rc; 5898 } 5899 5900 static int led_sysfs_set(struct led_classdev *led_cdev, 5901 enum led_brightness brightness) 5902 { 5903 struct tpacpi_led_classdev *data = container_of(led_cdev, 5904 struct tpacpi_led_classdev, led_classdev); 5905 enum led_status_t new_state; 5906 5907 if (brightness == LED_OFF) 5908 new_state = TPACPI_LED_OFF; 5909 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5910 new_state = TPACPI_LED_ON; 5911 else 5912 new_state = TPACPI_LED_BLINK; 5913 5914 return led_set_status(data->led, new_state); 5915 } 5916 5917 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5918 unsigned long *delay_on, unsigned long *delay_off) 5919 { 5920 struct tpacpi_led_classdev *data = container_of(led_cdev, 5921 struct tpacpi_led_classdev, led_classdev); 5922 5923 /* Can we choose the flash rate? */ 5924 if (*delay_on == 0 && *delay_off == 0) { 5925 /* yes. set them to the hardware blink rate (1 Hz) */ 5926 *delay_on = 500; /* ms */ 5927 *delay_off = 500; /* ms */ 5928 } else if ((*delay_on != 500) || (*delay_off != 500)) 5929 return -EINVAL; 5930 5931 return led_set_status(data->led, TPACPI_LED_BLINK); 5932 } 5933 5934 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5935 { 5936 int rc; 5937 5938 struct tpacpi_led_classdev *data = container_of(led_cdev, 5939 struct tpacpi_led_classdev, led_classdev); 5940 5941 rc = led_get_status(data->led); 5942 5943 if (rc == TPACPI_LED_OFF || rc < 0) 5944 rc = LED_OFF; /* no error handling in led class :( */ 5945 else 5946 rc = LED_FULL; 5947 5948 return rc; 5949 } 5950 5951 static void led_exit(void) 5952 { 5953 unsigned int i; 5954 5955 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5956 if (tpacpi_leds[i].led_classdev.name) 5957 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5958 } 5959 5960 kfree(tpacpi_leds); 5961 } 5962 5963 static int __init tpacpi_init_led(unsigned int led) 5964 { 5965 int rc; 5966 5967 tpacpi_leds[led].led = led; 5968 5969 /* LEDs with no name don't get registered */ 5970 if (!tpacpi_led_names[led]) 5971 return 0; 5972 5973 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set; 5974 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5975 if (led_supported == TPACPI_LED_570) 5976 tpacpi_leds[led].led_classdev.brightness_get = 5977 &led_sysfs_get; 5978 5979 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5980 5981 rc = led_classdev_register(&tpacpi_pdev->dev, 5982 &tpacpi_leds[led].led_classdev); 5983 if (rc < 0) 5984 tpacpi_leds[led].led_classdev.name = NULL; 5985 5986 return rc; 5987 } 5988 5989 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5990 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5991 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5992 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5993 5994 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5995 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5996 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5997 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5998 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5999 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 6000 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 6001 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 6002 6003 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 6004 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 6005 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 6006 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 6007 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 6008 6009 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 6010 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 6011 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 6012 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 6013 6014 /* (1) - may have excess leds enabled on MSB */ 6015 6016 /* Defaults (order matters, keep last, don't reorder!) */ 6017 { /* Lenovo */ 6018 .vendor = PCI_VENDOR_ID_LENOVO, 6019 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 6020 .quirks = 0x1fffU, 6021 }, 6022 { /* IBM ThinkPads with no EC version string */ 6023 .vendor = PCI_VENDOR_ID_IBM, 6024 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 6025 .quirks = 0x00ffU, 6026 }, 6027 { /* IBM ThinkPads with EC version string */ 6028 .vendor = PCI_VENDOR_ID_IBM, 6029 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 6030 .quirks = 0x00bfU, 6031 }, 6032 }; 6033 6034 static enum led_access_mode __init led_init_detect_mode(void) 6035 { 6036 acpi_status status; 6037 6038 if (tpacpi_is_ibm()) { 6039 /* 570 */ 6040 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 6041 if (ACPI_SUCCESS(status)) 6042 return TPACPI_LED_570; 6043 6044 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 6045 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 6046 if (ACPI_SUCCESS(status)) 6047 return TPACPI_LED_OLD; 6048 } 6049 6050 /* most others */ 6051 status = acpi_get_handle(ec_handle, "LED", &led_handle); 6052 if (ACPI_SUCCESS(status)) 6053 return TPACPI_LED_NEW; 6054 6055 /* R30, R31, and unknown firmwares */ 6056 led_handle = NULL; 6057 return TPACPI_LED_NONE; 6058 } 6059 6060 static int __init led_init(struct ibm_init_struct *iibm) 6061 { 6062 unsigned int i; 6063 int rc; 6064 unsigned long useful_leds; 6065 6066 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 6067 6068 led_supported = led_init_detect_mode(); 6069 6070 if (led_supported != TPACPI_LED_NONE) { 6071 useful_leds = tpacpi_check_quirks(led_useful_qtable, 6072 ARRAY_SIZE(led_useful_qtable)); 6073 6074 if (!useful_leds) { 6075 led_handle = NULL; 6076 led_supported = TPACPI_LED_NONE; 6077 } 6078 } 6079 6080 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 6081 str_supported(led_supported), led_supported); 6082 6083 if (led_supported == TPACPI_LED_NONE) 6084 return 1; 6085 6086 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds), 6087 GFP_KERNEL); 6088 if (!tpacpi_leds) { 6089 pr_err("Out of memory for LED data\n"); 6090 return -ENOMEM; 6091 } 6092 6093 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 6094 tpacpi_leds[i].led = -1; 6095 6096 if (!tpacpi_is_led_restricted(i) && 6097 test_bit(i, &useful_leds)) { 6098 rc = tpacpi_init_led(i); 6099 if (rc < 0) { 6100 led_exit(); 6101 return rc; 6102 } 6103 } 6104 } 6105 6106 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 6107 pr_notice("warning: userspace override of important firmware LEDs is enabled\n"); 6108 #endif 6109 return 0; 6110 } 6111 6112 #define str_led_status(s) \ 6113 ((s) == TPACPI_LED_OFF ? "off" : \ 6114 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 6115 6116 static int led_read(struct seq_file *m) 6117 { 6118 if (!led_supported) { 6119 seq_printf(m, "status:\t\tnot supported\n"); 6120 return 0; 6121 } 6122 seq_printf(m, "status:\t\tsupported\n"); 6123 6124 if (led_supported == TPACPI_LED_570) { 6125 /* 570 */ 6126 int i, status; 6127 for (i = 0; i < 8; i++) { 6128 status = led_get_status(i); 6129 if (status < 0) 6130 return -EIO; 6131 seq_printf(m, "%d:\t\t%s\n", 6132 i, str_led_status(status)); 6133 } 6134 } 6135 6136 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 6137 6138 return 0; 6139 } 6140 6141 static int led_write(char *buf) 6142 { 6143 char *cmd; 6144 int led, rc; 6145 enum led_status_t s; 6146 6147 if (!led_supported) 6148 return -ENODEV; 6149 6150 while ((cmd = next_cmd(&buf))) { 6151 if (sscanf(cmd, "%d", &led) != 1) 6152 return -EINVAL; 6153 6154 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 6155 tpacpi_leds[led].led < 0) 6156 return -ENODEV; 6157 6158 if (strstr(cmd, "off")) { 6159 s = TPACPI_LED_OFF; 6160 } else if (strstr(cmd, "on")) { 6161 s = TPACPI_LED_ON; 6162 } else if (strstr(cmd, "blink")) { 6163 s = TPACPI_LED_BLINK; 6164 } else { 6165 return -EINVAL; 6166 } 6167 6168 rc = led_set_status(led, s); 6169 if (rc < 0) 6170 return rc; 6171 } 6172 6173 return 0; 6174 } 6175 6176 static struct ibm_struct led_driver_data = { 6177 .name = "led", 6178 .read = led_read, 6179 .write = led_write, 6180 .exit = led_exit, 6181 }; 6182 6183 /************************************************************************* 6184 * Beep subdriver 6185 */ 6186 6187 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 6188 6189 #define TPACPI_BEEP_Q1 0x0001 6190 6191 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 6192 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 6193 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 6194 }; 6195 6196 static int __init beep_init(struct ibm_init_struct *iibm) 6197 { 6198 unsigned long quirks; 6199 6200 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 6201 6202 TPACPI_ACPIHANDLE_INIT(beep); 6203 6204 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 6205 str_supported(beep_handle != NULL)); 6206 6207 quirks = tpacpi_check_quirks(beep_quirk_table, 6208 ARRAY_SIZE(beep_quirk_table)); 6209 6210 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6211 6212 return (beep_handle) ? 0 : 1; 6213 } 6214 6215 static int beep_read(struct seq_file *m) 6216 { 6217 if (!beep_handle) 6218 seq_printf(m, "status:\t\tnot supported\n"); 6219 else { 6220 seq_printf(m, "status:\t\tsupported\n"); 6221 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6222 } 6223 6224 return 0; 6225 } 6226 6227 static int beep_write(char *buf) 6228 { 6229 char *cmd; 6230 int beep_cmd; 6231 6232 if (!beep_handle) 6233 return -ENODEV; 6234 6235 while ((cmd = next_cmd(&buf))) { 6236 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6237 beep_cmd >= 0 && beep_cmd <= 17) { 6238 /* beep_cmd set */ 6239 } else 6240 return -EINVAL; 6241 if (tp_features.beep_needs_two_args) { 6242 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6243 beep_cmd, 0)) 6244 return -EIO; 6245 } else { 6246 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6247 beep_cmd)) 6248 return -EIO; 6249 } 6250 } 6251 6252 return 0; 6253 } 6254 6255 static struct ibm_struct beep_driver_data = { 6256 .name = "beep", 6257 .read = beep_read, 6258 .write = beep_write, 6259 }; 6260 6261 /************************************************************************* 6262 * Thermal subdriver 6263 */ 6264 6265 enum thermal_access_mode { 6266 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6267 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6268 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6269 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6270 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6271 }; 6272 6273 enum { /* TPACPI_THERMAL_TPEC_* */ 6274 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6275 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6276 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6277 6278 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6279 }; 6280 6281 6282 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6283 struct ibm_thermal_sensors_struct { 6284 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6285 }; 6286 6287 static enum thermal_access_mode thermal_read_mode; 6288 6289 /* idx is zero-based */ 6290 static int thermal_get_sensor(int idx, s32 *value) 6291 { 6292 int t; 6293 s8 tmp; 6294 char tmpi[5]; 6295 6296 t = TP_EC_THERMAL_TMP0; 6297 6298 switch (thermal_read_mode) { 6299 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6300 case TPACPI_THERMAL_TPEC_16: 6301 if (idx >= 8 && idx <= 15) { 6302 t = TP_EC_THERMAL_TMP8; 6303 idx -= 8; 6304 } 6305 #endif 6306 /* fallthrough */ 6307 case TPACPI_THERMAL_TPEC_8: 6308 if (idx <= 7) { 6309 if (!acpi_ec_read(t + idx, &tmp)) 6310 return -EIO; 6311 *value = tmp * 1000; 6312 return 0; 6313 } 6314 break; 6315 6316 case TPACPI_THERMAL_ACPI_UPDT: 6317 if (idx <= 7) { 6318 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6319 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6320 return -EIO; 6321 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6322 return -EIO; 6323 *value = (t - 2732) * 100; 6324 return 0; 6325 } 6326 break; 6327 6328 case TPACPI_THERMAL_ACPI_TMP07: 6329 if (idx <= 7) { 6330 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6331 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6332 return -EIO; 6333 if (t > 127 || t < -127) 6334 t = TP_EC_THERMAL_TMP_NA; 6335 *value = t * 1000; 6336 return 0; 6337 } 6338 break; 6339 6340 case TPACPI_THERMAL_NONE: 6341 default: 6342 return -ENOSYS; 6343 } 6344 6345 return -EINVAL; 6346 } 6347 6348 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6349 { 6350 int res, i; 6351 int n; 6352 6353 n = 8; 6354 i = 0; 6355 6356 if (!s) 6357 return -EINVAL; 6358 6359 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6360 n = 16; 6361 6362 for (i = 0 ; i < n; i++) { 6363 res = thermal_get_sensor(i, &s->temp[i]); 6364 if (res) 6365 return res; 6366 } 6367 6368 return n; 6369 } 6370 6371 static void thermal_dump_all_sensors(void) 6372 { 6373 int n, i; 6374 struct ibm_thermal_sensors_struct t; 6375 6376 n = thermal_get_sensors(&t); 6377 if (n <= 0) 6378 return; 6379 6380 pr_notice("temperatures (Celsius):"); 6381 6382 for (i = 0; i < n; i++) { 6383 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6384 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6385 else 6386 pr_cont(" N/A"); 6387 } 6388 6389 pr_cont("\n"); 6390 } 6391 6392 /* sysfs temp##_input -------------------------------------------------- */ 6393 6394 static ssize_t thermal_temp_input_show(struct device *dev, 6395 struct device_attribute *attr, 6396 char *buf) 6397 { 6398 struct sensor_device_attribute *sensor_attr = 6399 to_sensor_dev_attr(attr); 6400 int idx = sensor_attr->index; 6401 s32 value; 6402 int res; 6403 6404 res = thermal_get_sensor(idx, &value); 6405 if (res) 6406 return res; 6407 if (value == TPACPI_THERMAL_SENSOR_NA) 6408 return -ENXIO; 6409 6410 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6411 } 6412 6413 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6414 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6415 thermal_temp_input_show, NULL, _idxB) 6416 6417 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6418 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6419 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6420 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6421 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6422 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6423 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6424 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6425 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6426 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6427 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6428 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6429 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6430 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6431 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6432 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6433 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6434 }; 6435 6436 #define THERMAL_ATTRS(X) \ 6437 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6438 6439 static struct attribute *thermal_temp_input_attr[] = { 6440 THERMAL_ATTRS(8), 6441 THERMAL_ATTRS(9), 6442 THERMAL_ATTRS(10), 6443 THERMAL_ATTRS(11), 6444 THERMAL_ATTRS(12), 6445 THERMAL_ATTRS(13), 6446 THERMAL_ATTRS(14), 6447 THERMAL_ATTRS(15), 6448 THERMAL_ATTRS(0), 6449 THERMAL_ATTRS(1), 6450 THERMAL_ATTRS(2), 6451 THERMAL_ATTRS(3), 6452 THERMAL_ATTRS(4), 6453 THERMAL_ATTRS(5), 6454 THERMAL_ATTRS(6), 6455 THERMAL_ATTRS(7), 6456 NULL 6457 }; 6458 6459 static const struct attribute_group thermal_temp_input16_group = { 6460 .attrs = thermal_temp_input_attr 6461 }; 6462 6463 static const struct attribute_group thermal_temp_input8_group = { 6464 .attrs = &thermal_temp_input_attr[8] 6465 }; 6466 6467 #undef THERMAL_SENSOR_ATTR_TEMP 6468 #undef THERMAL_ATTRS 6469 6470 /* --------------------------------------------------------------------- */ 6471 6472 static int __init thermal_init(struct ibm_init_struct *iibm) 6473 { 6474 u8 t, ta1, ta2; 6475 int i; 6476 int acpi_tmp7; 6477 int res; 6478 6479 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6480 6481 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6482 6483 if (thinkpad_id.ec_model) { 6484 /* 6485 * Direct EC access mode: sensors at registers 6486 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6487 * non-implemented, thermal sensors return 0x80 when 6488 * not available 6489 */ 6490 6491 ta1 = ta2 = 0; 6492 for (i = 0; i < 8; i++) { 6493 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6494 ta1 |= t; 6495 } else { 6496 ta1 = 0; 6497 break; 6498 } 6499 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6500 ta2 |= t; 6501 } else { 6502 ta1 = 0; 6503 break; 6504 } 6505 } 6506 if (ta1 == 0) { 6507 /* This is sheer paranoia, but we handle it anyway */ 6508 if (acpi_tmp7) { 6509 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n"); 6510 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6511 } else { 6512 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n"); 6513 thermal_read_mode = TPACPI_THERMAL_NONE; 6514 } 6515 } else { 6516 thermal_read_mode = 6517 (ta2 != 0) ? 6518 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6519 } 6520 } else if (acpi_tmp7) { 6521 if (tpacpi_is_ibm() && 6522 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6523 /* 600e/x, 770e, 770x */ 6524 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6525 } else { 6526 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6527 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6528 } 6529 } else { 6530 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6531 thermal_read_mode = TPACPI_THERMAL_NONE; 6532 } 6533 6534 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6535 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6536 thermal_read_mode); 6537 6538 switch (thermal_read_mode) { 6539 case TPACPI_THERMAL_TPEC_16: 6540 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6541 &thermal_temp_input16_group); 6542 if (res) 6543 return res; 6544 break; 6545 case TPACPI_THERMAL_TPEC_8: 6546 case TPACPI_THERMAL_ACPI_TMP07: 6547 case TPACPI_THERMAL_ACPI_UPDT: 6548 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6549 &thermal_temp_input8_group); 6550 if (res) 6551 return res; 6552 break; 6553 case TPACPI_THERMAL_NONE: 6554 default: 6555 return 1; 6556 } 6557 6558 return 0; 6559 } 6560 6561 static void thermal_exit(void) 6562 { 6563 switch (thermal_read_mode) { 6564 case TPACPI_THERMAL_TPEC_16: 6565 sysfs_remove_group(&tpacpi_hwmon->kobj, 6566 &thermal_temp_input16_group); 6567 break; 6568 case TPACPI_THERMAL_TPEC_8: 6569 case TPACPI_THERMAL_ACPI_TMP07: 6570 case TPACPI_THERMAL_ACPI_UPDT: 6571 sysfs_remove_group(&tpacpi_hwmon->kobj, 6572 &thermal_temp_input8_group); 6573 break; 6574 case TPACPI_THERMAL_NONE: 6575 default: 6576 break; 6577 } 6578 } 6579 6580 static int thermal_read(struct seq_file *m) 6581 { 6582 int n, i; 6583 struct ibm_thermal_sensors_struct t; 6584 6585 n = thermal_get_sensors(&t); 6586 if (unlikely(n < 0)) 6587 return n; 6588 6589 seq_printf(m, "temperatures:\t"); 6590 6591 if (n > 0) { 6592 for (i = 0; i < (n - 1); i++) 6593 seq_printf(m, "%d ", t.temp[i] / 1000); 6594 seq_printf(m, "%d\n", t.temp[i] / 1000); 6595 } else 6596 seq_printf(m, "not supported\n"); 6597 6598 return 0; 6599 } 6600 6601 static struct ibm_struct thermal_driver_data = { 6602 .name = "thermal", 6603 .read = thermal_read, 6604 .exit = thermal_exit, 6605 }; 6606 6607 /************************************************************************* 6608 * Backlight/brightness subdriver 6609 */ 6610 6611 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6612 6613 /* 6614 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6615 * CMOS NVRAM byte 0x5E, bits 0-3. 6616 * 6617 * EC HBRV (0x31) has the following layout 6618 * Bit 7: unknown function 6619 * Bit 6: unknown function 6620 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6621 * Bit 4: must be set to zero to avoid problems 6622 * Bit 3-0: backlight brightness level 6623 * 6624 * brightness_get_raw returns status data in the HBRV layout 6625 * 6626 * WARNING: The X61 has been verified to use HBRV for something else, so 6627 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6628 * testing on the very early *60 Lenovo models... 6629 */ 6630 6631 enum { 6632 TP_EC_BACKLIGHT = 0x31, 6633 6634 /* TP_EC_BACKLIGHT bitmasks */ 6635 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6636 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6637 TP_EC_BACKLIGHT_MAPSW = 0x20, 6638 }; 6639 6640 enum tpacpi_brightness_access_mode { 6641 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6642 TPACPI_BRGHT_MODE_EC, /* EC control */ 6643 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6644 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6645 TPACPI_BRGHT_MODE_MAX 6646 }; 6647 6648 static struct backlight_device *ibm_backlight_device; 6649 6650 static enum tpacpi_brightness_access_mode brightness_mode = 6651 TPACPI_BRGHT_MODE_MAX; 6652 6653 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6654 6655 static struct mutex brightness_mutex; 6656 6657 /* NVRAM brightness access, 6658 * call with brightness_mutex held! */ 6659 static unsigned int tpacpi_brightness_nvram_get(void) 6660 { 6661 u8 lnvram; 6662 6663 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6664 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6665 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6666 lnvram &= bright_maxlvl; 6667 6668 return lnvram; 6669 } 6670 6671 static void tpacpi_brightness_checkpoint_nvram(void) 6672 { 6673 u8 lec = 0; 6674 u8 b_nvram; 6675 6676 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6677 return; 6678 6679 vdbg_printk(TPACPI_DBG_BRGHT, 6680 "trying to checkpoint backlight level to NVRAM...\n"); 6681 6682 if (mutex_lock_killable(&brightness_mutex) < 0) 6683 return; 6684 6685 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6686 goto unlock; 6687 lec &= TP_EC_BACKLIGHT_LVLMSK; 6688 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6689 6690 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6691 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6692 /* NVRAM needs update */ 6693 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6694 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6695 b_nvram |= lec; 6696 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6697 dbg_printk(TPACPI_DBG_BRGHT, 6698 "updated NVRAM backlight level to %u (0x%02x)\n", 6699 (unsigned int) lec, (unsigned int) b_nvram); 6700 } else 6701 vdbg_printk(TPACPI_DBG_BRGHT, 6702 "NVRAM backlight level already is %u (0x%02x)\n", 6703 (unsigned int) lec, (unsigned int) b_nvram); 6704 6705 unlock: 6706 mutex_unlock(&brightness_mutex); 6707 } 6708 6709 6710 /* call with brightness_mutex held! */ 6711 static int tpacpi_brightness_get_raw(int *status) 6712 { 6713 u8 lec = 0; 6714 6715 switch (brightness_mode) { 6716 case TPACPI_BRGHT_MODE_UCMS_STEP: 6717 *status = tpacpi_brightness_nvram_get(); 6718 return 0; 6719 case TPACPI_BRGHT_MODE_EC: 6720 case TPACPI_BRGHT_MODE_ECNVRAM: 6721 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6722 return -EIO; 6723 *status = lec; 6724 return 0; 6725 default: 6726 return -ENXIO; 6727 } 6728 } 6729 6730 /* call with brightness_mutex held! */ 6731 /* do NOT call with illegal backlight level value */ 6732 static int tpacpi_brightness_set_ec(unsigned int value) 6733 { 6734 u8 lec = 0; 6735 6736 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6737 return -EIO; 6738 6739 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6740 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6741 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6742 return -EIO; 6743 6744 return 0; 6745 } 6746 6747 /* call with brightness_mutex held! */ 6748 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6749 { 6750 int cmos_cmd, inc; 6751 unsigned int current_value, i; 6752 6753 current_value = tpacpi_brightness_nvram_get(); 6754 6755 if (value == current_value) 6756 return 0; 6757 6758 cmos_cmd = (value > current_value) ? 6759 TP_CMOS_BRIGHTNESS_UP : 6760 TP_CMOS_BRIGHTNESS_DOWN; 6761 inc = (value > current_value) ? 1 : -1; 6762 6763 for (i = current_value; i != value; i += inc) 6764 if (issue_thinkpad_cmos_command(cmos_cmd)) 6765 return -EIO; 6766 6767 return 0; 6768 } 6769 6770 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6771 static int brightness_set(unsigned int value) 6772 { 6773 int res; 6774 6775 if (value > bright_maxlvl) 6776 return -EINVAL; 6777 6778 vdbg_printk(TPACPI_DBG_BRGHT, 6779 "set backlight level to %d\n", value); 6780 6781 res = mutex_lock_killable(&brightness_mutex); 6782 if (res < 0) 6783 return res; 6784 6785 switch (brightness_mode) { 6786 case TPACPI_BRGHT_MODE_EC: 6787 case TPACPI_BRGHT_MODE_ECNVRAM: 6788 res = tpacpi_brightness_set_ec(value); 6789 break; 6790 case TPACPI_BRGHT_MODE_UCMS_STEP: 6791 res = tpacpi_brightness_set_ucmsstep(value); 6792 break; 6793 default: 6794 res = -ENXIO; 6795 } 6796 6797 mutex_unlock(&brightness_mutex); 6798 return res; 6799 } 6800 6801 /* sysfs backlight class ----------------------------------------------- */ 6802 6803 static int brightness_update_status(struct backlight_device *bd) 6804 { 6805 unsigned int level = 6806 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6807 bd->props.power == FB_BLANK_UNBLANK) ? 6808 bd->props.brightness : 0; 6809 6810 dbg_printk(TPACPI_DBG_BRGHT, 6811 "backlight: attempt to set level to %d\n", 6812 level); 6813 6814 /* it is the backlight class's job (caller) to handle 6815 * EINTR and other errors properly */ 6816 return brightness_set(level); 6817 } 6818 6819 static int brightness_get(struct backlight_device *bd) 6820 { 6821 int status, res; 6822 6823 res = mutex_lock_killable(&brightness_mutex); 6824 if (res < 0) 6825 return 0; 6826 6827 res = tpacpi_brightness_get_raw(&status); 6828 6829 mutex_unlock(&brightness_mutex); 6830 6831 if (res < 0) 6832 return 0; 6833 6834 return status & TP_EC_BACKLIGHT_LVLMSK; 6835 } 6836 6837 static void tpacpi_brightness_notify_change(void) 6838 { 6839 backlight_force_update(ibm_backlight_device, 6840 BACKLIGHT_UPDATE_HOTKEY); 6841 } 6842 6843 static const struct backlight_ops ibm_backlight_data = { 6844 .get_brightness = brightness_get, 6845 .update_status = brightness_update_status, 6846 }; 6847 6848 /* --------------------------------------------------------------------- */ 6849 6850 /* 6851 * Call _BCL method of video device. On some ThinkPads this will 6852 * switch the firmware to the ACPI brightness control mode. 6853 */ 6854 6855 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6856 { 6857 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6858 union acpi_object *obj; 6859 struct acpi_device *device, *child; 6860 int rc; 6861 6862 if (acpi_bus_get_device(handle, &device)) 6863 return 0; 6864 6865 rc = 0; 6866 list_for_each_entry(child, &device->children, node) { 6867 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6868 NULL, &buffer); 6869 if (ACPI_FAILURE(status)) 6870 continue; 6871 6872 obj = (union acpi_object *)buffer.pointer; 6873 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6874 pr_err("Unknown _BCL data, please report this to %s\n", 6875 TPACPI_MAIL); 6876 rc = 0; 6877 } else { 6878 rc = obj->package.count; 6879 } 6880 break; 6881 } 6882 6883 kfree(buffer.pointer); 6884 return rc; 6885 } 6886 6887 6888 /* 6889 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6890 */ 6891 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6892 { 6893 acpi_handle video_device; 6894 int bcl_levels = 0; 6895 6896 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6897 if (video_device) 6898 bcl_levels = tpacpi_query_bcl_levels(video_device); 6899 6900 tp_features.bright_acpimode = (bcl_levels > 0); 6901 6902 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6903 } 6904 6905 /* 6906 * These are only useful for models that have only one possibility 6907 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6908 * these quirks. 6909 */ 6910 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6911 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6912 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6913 6914 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6915 /* Models with ATI GPUs known to require ECNVRAM mode */ 6916 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6917 6918 /* Models with ATI GPUs that can use ECNVRAM */ 6919 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6920 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6921 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6922 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6923 6924 /* Models with Intel Extreme Graphics 2 */ 6925 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6926 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6927 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6928 6929 /* Models with Intel GMA900 */ 6930 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6931 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6932 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6933 }; 6934 6935 /* 6936 * Returns < 0 for error, otherwise sets tp_features.bright_* 6937 * and bright_maxlvl. 6938 */ 6939 static void __init tpacpi_detect_brightness_capabilities(void) 6940 { 6941 unsigned int b; 6942 6943 vdbg_printk(TPACPI_DBG_INIT, 6944 "detecting firmware brightness interface capabilities\n"); 6945 6946 /* we could run a quirks check here (same table used by 6947 * brightness_init) if needed */ 6948 6949 /* 6950 * We always attempt to detect acpi support, so as to switch 6951 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6952 * going to publish a backlight interface 6953 */ 6954 b = tpacpi_check_std_acpi_brightness_support(); 6955 switch (b) { 6956 case 16: 6957 bright_maxlvl = 15; 6958 break; 6959 case 8: 6960 case 0: 6961 bright_maxlvl = 7; 6962 break; 6963 default: 6964 tp_features.bright_unkfw = 1; 6965 bright_maxlvl = b - 1; 6966 } 6967 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6968 } 6969 6970 static int __init brightness_init(struct ibm_init_struct *iibm) 6971 { 6972 struct backlight_properties props; 6973 int b; 6974 unsigned long quirks; 6975 6976 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6977 6978 mutex_init(&brightness_mutex); 6979 6980 quirks = tpacpi_check_quirks(brightness_quirk_table, 6981 ARRAY_SIZE(brightness_quirk_table)); 6982 6983 /* tpacpi_detect_brightness_capabilities() must have run already */ 6984 6985 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6986 if (tp_features.bright_unkfw) 6987 return 1; 6988 6989 if (!brightness_enable) { 6990 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6991 "brightness support disabled by module parameter\n"); 6992 return 1; 6993 } 6994 6995 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6996 if (brightness_enable > 1) { 6997 pr_info("Standard ACPI backlight interface available, not loading native one\n"); 6998 return 1; 6999 } else if (brightness_enable == 1) { 7000 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n"); 7001 return 1; 7002 } 7003 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 7004 pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n"); 7005 } 7006 7007 /* 7008 * Check for module parameter bogosity, note that we 7009 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 7010 * able to detect "unspecified" 7011 */ 7012 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 7013 return -EINVAL; 7014 7015 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 7016 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 7017 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 7018 if (quirks & TPACPI_BRGHT_Q_EC) 7019 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 7020 else 7021 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 7022 7023 dbg_printk(TPACPI_DBG_BRGHT, 7024 "driver auto-selected brightness_mode=%d\n", 7025 brightness_mode); 7026 } 7027 7028 /* Safety */ 7029 if (!tpacpi_is_ibm() && 7030 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 7031 brightness_mode == TPACPI_BRGHT_MODE_EC)) 7032 return -EINVAL; 7033 7034 if (tpacpi_brightness_get_raw(&b) < 0) 7035 return 1; 7036 7037 memset(&props, 0, sizeof(struct backlight_properties)); 7038 props.type = BACKLIGHT_PLATFORM; 7039 props.max_brightness = bright_maxlvl; 7040 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 7041 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 7042 NULL, NULL, 7043 &ibm_backlight_data, 7044 &props); 7045 if (IS_ERR(ibm_backlight_device)) { 7046 int rc = PTR_ERR(ibm_backlight_device); 7047 ibm_backlight_device = NULL; 7048 pr_err("Could not register backlight device\n"); 7049 return rc; 7050 } 7051 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7052 "brightness is supported\n"); 7053 7054 if (quirks & TPACPI_BRGHT_Q_ASK) { 7055 pr_notice("brightness: will use unverified default: brightness_mode=%d\n", 7056 brightness_mode); 7057 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n", 7058 TPACPI_MAIL); 7059 } 7060 7061 /* Added by mistake in early 2007. Probably useless, but it could 7062 * be working around some unknown firmware problem where the value 7063 * read at startup doesn't match the real hardware state... so leave 7064 * it in place just in case */ 7065 backlight_update_status(ibm_backlight_device); 7066 7067 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7068 "brightness: registering brightness hotkeys as change notification\n"); 7069 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7070 | TP_ACPI_HKEY_BRGHTUP_MASK 7071 | TP_ACPI_HKEY_BRGHTDWN_MASK); 7072 return 0; 7073 } 7074 7075 static void brightness_suspend(void) 7076 { 7077 tpacpi_brightness_checkpoint_nvram(); 7078 } 7079 7080 static void brightness_shutdown(void) 7081 { 7082 tpacpi_brightness_checkpoint_nvram(); 7083 } 7084 7085 static void brightness_exit(void) 7086 { 7087 if (ibm_backlight_device) { 7088 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 7089 "calling backlight_device_unregister()\n"); 7090 backlight_device_unregister(ibm_backlight_device); 7091 } 7092 7093 tpacpi_brightness_checkpoint_nvram(); 7094 } 7095 7096 static int brightness_read(struct seq_file *m) 7097 { 7098 int level; 7099 7100 level = brightness_get(NULL); 7101 if (level < 0) { 7102 seq_printf(m, "level:\t\tunreadable\n"); 7103 } else { 7104 seq_printf(m, "level:\t\t%d\n", level); 7105 seq_printf(m, "commands:\tup, down\n"); 7106 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7107 bright_maxlvl); 7108 } 7109 7110 return 0; 7111 } 7112 7113 static int brightness_write(char *buf) 7114 { 7115 int level; 7116 int rc; 7117 char *cmd; 7118 7119 level = brightness_get(NULL); 7120 if (level < 0) 7121 return level; 7122 7123 while ((cmd = next_cmd(&buf))) { 7124 if (strlencmp(cmd, "up") == 0) { 7125 if (level < bright_maxlvl) 7126 level++; 7127 } else if (strlencmp(cmd, "down") == 0) { 7128 if (level > 0) 7129 level--; 7130 } else if (sscanf(cmd, "level %d", &level) == 1 && 7131 level >= 0 && level <= bright_maxlvl) { 7132 /* new level set */ 7133 } else 7134 return -EINVAL; 7135 } 7136 7137 tpacpi_disclose_usertask("procfs brightness", 7138 "set level to %d\n", level); 7139 7140 /* 7141 * Now we know what the final level should be, so we try to set it. 7142 * Doing it this way makes the syscall restartable in case of EINTR 7143 */ 7144 rc = brightness_set(level); 7145 if (!rc && ibm_backlight_device) 7146 backlight_force_update(ibm_backlight_device, 7147 BACKLIGHT_UPDATE_SYSFS); 7148 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7149 } 7150 7151 static struct ibm_struct brightness_driver_data = { 7152 .name = "brightness", 7153 .read = brightness_read, 7154 .write = brightness_write, 7155 .exit = brightness_exit, 7156 .suspend = brightness_suspend, 7157 .shutdown = brightness_shutdown, 7158 }; 7159 7160 /************************************************************************* 7161 * Volume subdriver 7162 */ 7163 7164 /* 7165 * IBM ThinkPads have a simple volume controller with MUTE gating. 7166 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 7167 * 7168 * Since the *61 series (and probably also the later *60 series), Lenovo 7169 * ThinkPads only implement the MUTE gate. 7170 * 7171 * EC register 0x30 7172 * Bit 6: MUTE (1 mutes sound) 7173 * Bit 3-0: Volume 7174 * Other bits should be zero as far as we know. 7175 * 7176 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 7177 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 7178 * such as bit 7 which is used to detect repeated presses of MUTE, 7179 * and we leave them unchanged. 7180 * 7181 * On newer Lenovo ThinkPads, the EC can automatically change the volume 7182 * in response to user input. Unfortunately, this rarely works well. 7183 * The laptop changes the state of its internal MUTE gate and, on some 7184 * models, sends KEY_MUTE, causing any user code that responds to the 7185 * mute button to get confused. The hardware MUTE gate is also 7186 * unnecessary, since user code can handle the mute button without 7187 * kernel or EC help. 7188 * 7189 * To avoid confusing userspace, we simply disable all EC-based mute 7190 * and volume controls when possible. 7191 */ 7192 7193 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 7194 7195 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 7196 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 7197 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7198 7199 #if SNDRV_CARDS <= 32 7200 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7201 #else 7202 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7203 #endif 7204 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7205 static char *alsa_id = "ThinkPadEC"; 7206 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7207 7208 struct tpacpi_alsa_data { 7209 struct snd_card *card; 7210 struct snd_ctl_elem_id *ctl_mute_id; 7211 struct snd_ctl_elem_id *ctl_vol_id; 7212 }; 7213 7214 static struct snd_card *alsa_card; 7215 7216 enum { 7217 TP_EC_AUDIO = 0x30, 7218 7219 /* TP_EC_AUDIO bits */ 7220 TP_EC_AUDIO_MUTESW = 6, 7221 7222 /* TP_EC_AUDIO bitmasks */ 7223 TP_EC_AUDIO_LVL_MSK = 0x0F, 7224 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7225 7226 /* Maximum volume */ 7227 TP_EC_VOLUME_MAX = 14, 7228 }; 7229 7230 enum tpacpi_volume_access_mode { 7231 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7232 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7233 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7234 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7235 TPACPI_VOL_MODE_MAX 7236 }; 7237 7238 enum tpacpi_volume_capabilities { 7239 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7240 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7241 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7242 TPACPI_VOL_CAP_MAX 7243 }; 7244 7245 enum tpacpi_mute_btn_mode { 7246 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7247 /* We don't know what mode 1 is. */ 7248 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7249 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7250 }; 7251 7252 static enum tpacpi_volume_access_mode volume_mode = 7253 TPACPI_VOL_MODE_MAX; 7254 7255 static enum tpacpi_volume_capabilities volume_capabilities; 7256 static bool volume_control_allowed; 7257 static bool software_mute_requested = true; 7258 static bool software_mute_active; 7259 static int software_mute_orig_mode; 7260 7261 /* 7262 * Used to syncronize writers to TP_EC_AUDIO and 7263 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7264 */ 7265 static struct mutex volume_mutex; 7266 7267 static void tpacpi_volume_checkpoint_nvram(void) 7268 { 7269 u8 lec = 0; 7270 u8 b_nvram; 7271 u8 ec_mask; 7272 7273 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7274 return; 7275 if (!volume_control_allowed) 7276 return; 7277 if (software_mute_active) 7278 return; 7279 7280 vdbg_printk(TPACPI_DBG_MIXER, 7281 "trying to checkpoint mixer state to NVRAM...\n"); 7282 7283 if (tp_features.mixer_no_level_control) 7284 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7285 else 7286 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7287 7288 if (mutex_lock_killable(&volume_mutex) < 0) 7289 return; 7290 7291 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7292 goto unlock; 7293 lec &= ec_mask; 7294 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7295 7296 if (lec != (b_nvram & ec_mask)) { 7297 /* NVRAM needs update */ 7298 b_nvram &= ~ec_mask; 7299 b_nvram |= lec; 7300 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7301 dbg_printk(TPACPI_DBG_MIXER, 7302 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7303 (unsigned int) lec, (unsigned int) b_nvram); 7304 } else { 7305 vdbg_printk(TPACPI_DBG_MIXER, 7306 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7307 (unsigned int) lec, (unsigned int) b_nvram); 7308 } 7309 7310 unlock: 7311 mutex_unlock(&volume_mutex); 7312 } 7313 7314 static int volume_get_status_ec(u8 *status) 7315 { 7316 u8 s; 7317 7318 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7319 return -EIO; 7320 7321 *status = s; 7322 7323 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7324 7325 return 0; 7326 } 7327 7328 static int volume_get_status(u8 *status) 7329 { 7330 return volume_get_status_ec(status); 7331 } 7332 7333 static int volume_set_status_ec(const u8 status) 7334 { 7335 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7336 return -EIO; 7337 7338 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7339 7340 /* 7341 * On X200s, and possibly on others, it can take a while for 7342 * reads to become correct. 7343 */ 7344 msleep(1); 7345 7346 return 0; 7347 } 7348 7349 static int volume_set_status(const u8 status) 7350 { 7351 return volume_set_status_ec(status); 7352 } 7353 7354 /* returns < 0 on error, 0 on no change, 1 on change */ 7355 static int __volume_set_mute_ec(const bool mute) 7356 { 7357 int rc; 7358 u8 s, n; 7359 7360 if (mutex_lock_killable(&volume_mutex) < 0) 7361 return -EINTR; 7362 7363 rc = volume_get_status_ec(&s); 7364 if (rc) 7365 goto unlock; 7366 7367 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7368 s & ~TP_EC_AUDIO_MUTESW_MSK; 7369 7370 if (n != s) { 7371 rc = volume_set_status_ec(n); 7372 if (!rc) 7373 rc = 1; 7374 } 7375 7376 unlock: 7377 mutex_unlock(&volume_mutex); 7378 return rc; 7379 } 7380 7381 static int volume_alsa_set_mute(const bool mute) 7382 { 7383 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7384 (mute) ? "" : "un"); 7385 return __volume_set_mute_ec(mute); 7386 } 7387 7388 static int volume_set_mute(const bool mute) 7389 { 7390 int rc; 7391 7392 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7393 (mute) ? "" : "un"); 7394 7395 rc = __volume_set_mute_ec(mute); 7396 return (rc < 0) ? rc : 0; 7397 } 7398 7399 /* returns < 0 on error, 0 on no change, 1 on change */ 7400 static int __volume_set_volume_ec(const u8 vol) 7401 { 7402 int rc; 7403 u8 s, n; 7404 7405 if (vol > TP_EC_VOLUME_MAX) 7406 return -EINVAL; 7407 7408 if (mutex_lock_killable(&volume_mutex) < 0) 7409 return -EINTR; 7410 7411 rc = volume_get_status_ec(&s); 7412 if (rc) 7413 goto unlock; 7414 7415 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7416 7417 if (n != s) { 7418 rc = volume_set_status_ec(n); 7419 if (!rc) 7420 rc = 1; 7421 } 7422 7423 unlock: 7424 mutex_unlock(&volume_mutex); 7425 return rc; 7426 } 7427 7428 static int volume_set_software_mute(bool startup) 7429 { 7430 int result; 7431 7432 if (!tpacpi_is_lenovo()) 7433 return -ENODEV; 7434 7435 if (startup) { 7436 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7437 "HAUM", "qd")) 7438 return -EIO; 7439 7440 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7441 "Initial HAUM setting was %d\n", 7442 software_mute_orig_mode); 7443 } 7444 7445 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7446 (int)TP_EC_MUTE_BTN_NONE)) 7447 return -EIO; 7448 7449 if (result != TP_EC_MUTE_BTN_NONE) 7450 pr_warn("Unexpected SAUM result %d\n", 7451 result); 7452 7453 /* 7454 * In software mute mode, the standard codec controls take 7455 * precendence, so we unmute the ThinkPad HW switch at 7456 * startup. Just on case there are SAUM-capable ThinkPads 7457 * with level controls, set max HW volume as well. 7458 */ 7459 if (tp_features.mixer_no_level_control) 7460 result = volume_set_mute(false); 7461 else 7462 result = volume_set_status(TP_EC_VOLUME_MAX); 7463 7464 if (result != 0) 7465 pr_warn("Failed to unmute the HW mute switch\n"); 7466 7467 return 0; 7468 } 7469 7470 static void volume_exit_software_mute(void) 7471 { 7472 int r; 7473 7474 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7475 || r != software_mute_orig_mode) 7476 pr_warn("Failed to restore mute mode\n"); 7477 } 7478 7479 static int volume_alsa_set_volume(const u8 vol) 7480 { 7481 dbg_printk(TPACPI_DBG_MIXER, 7482 "ALSA: trying to set volume level to %hu\n", vol); 7483 return __volume_set_volume_ec(vol); 7484 } 7485 7486 static void volume_alsa_notify_change(void) 7487 { 7488 struct tpacpi_alsa_data *d; 7489 7490 if (alsa_card && alsa_card->private_data) { 7491 d = alsa_card->private_data; 7492 if (d->ctl_mute_id) 7493 snd_ctl_notify(alsa_card, 7494 SNDRV_CTL_EVENT_MASK_VALUE, 7495 d->ctl_mute_id); 7496 if (d->ctl_vol_id) 7497 snd_ctl_notify(alsa_card, 7498 SNDRV_CTL_EVENT_MASK_VALUE, 7499 d->ctl_vol_id); 7500 } 7501 } 7502 7503 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7504 struct snd_ctl_elem_info *uinfo) 7505 { 7506 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7507 uinfo->count = 1; 7508 uinfo->value.integer.min = 0; 7509 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7510 return 0; 7511 } 7512 7513 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7514 struct snd_ctl_elem_value *ucontrol) 7515 { 7516 u8 s; 7517 int rc; 7518 7519 rc = volume_get_status(&s); 7520 if (rc < 0) 7521 return rc; 7522 7523 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7524 return 0; 7525 } 7526 7527 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7528 struct snd_ctl_elem_value *ucontrol) 7529 { 7530 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7531 ucontrol->value.integer.value[0]); 7532 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7533 } 7534 7535 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7536 7537 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7538 struct snd_ctl_elem_value *ucontrol) 7539 { 7540 u8 s; 7541 int rc; 7542 7543 rc = volume_get_status(&s); 7544 if (rc < 0) 7545 return rc; 7546 7547 ucontrol->value.integer.value[0] = 7548 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7549 return 0; 7550 } 7551 7552 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7553 struct snd_ctl_elem_value *ucontrol) 7554 { 7555 tpacpi_disclose_usertask("ALSA", "%smute\n", 7556 ucontrol->value.integer.value[0] ? 7557 "un" : ""); 7558 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7559 } 7560 7561 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7562 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7563 .name = "Console Playback Volume", 7564 .index = 0, 7565 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7566 .info = volume_alsa_vol_info, 7567 .get = volume_alsa_vol_get, 7568 }; 7569 7570 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7571 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7572 .name = "Console Playback Switch", 7573 .index = 0, 7574 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7575 .info = volume_alsa_mute_info, 7576 .get = volume_alsa_mute_get, 7577 }; 7578 7579 static void volume_suspend(void) 7580 { 7581 tpacpi_volume_checkpoint_nvram(); 7582 } 7583 7584 static void volume_resume(void) 7585 { 7586 if (software_mute_active) { 7587 if (volume_set_software_mute(false) < 0) 7588 pr_warn("Failed to restore software mute\n"); 7589 } else { 7590 volume_alsa_notify_change(); 7591 } 7592 } 7593 7594 static void volume_shutdown(void) 7595 { 7596 tpacpi_volume_checkpoint_nvram(); 7597 } 7598 7599 static void volume_exit(void) 7600 { 7601 if (alsa_card) { 7602 snd_card_free(alsa_card); 7603 alsa_card = NULL; 7604 } 7605 7606 tpacpi_volume_checkpoint_nvram(); 7607 7608 if (software_mute_active) 7609 volume_exit_software_mute(); 7610 } 7611 7612 static int __init volume_create_alsa_mixer(void) 7613 { 7614 struct snd_card *card; 7615 struct tpacpi_alsa_data *data; 7616 struct snd_kcontrol *ctl_vol; 7617 struct snd_kcontrol *ctl_mute; 7618 int rc; 7619 7620 rc = snd_card_new(&tpacpi_pdev->dev, 7621 alsa_index, alsa_id, THIS_MODULE, 7622 sizeof(struct tpacpi_alsa_data), &card); 7623 if (rc < 0 || !card) { 7624 pr_err("Failed to create ALSA card structures: %d\n", rc); 7625 return 1; 7626 } 7627 7628 BUG_ON(!card->private_data); 7629 data = card->private_data; 7630 data->card = card; 7631 7632 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7633 sizeof(card->driver)); 7634 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7635 sizeof(card->shortname)); 7636 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7637 (thinkpad_id.ec_version_str) ? 7638 thinkpad_id.ec_version_str : "(unknown)"); 7639 snprintf(card->longname, sizeof(card->longname), 7640 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7641 (thinkpad_id.ec_version_str) ? 7642 thinkpad_id.ec_version_str : "unknown"); 7643 7644 if (volume_control_allowed) { 7645 volume_alsa_control_vol.put = volume_alsa_vol_put; 7646 volume_alsa_control_vol.access = 7647 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7648 7649 volume_alsa_control_mute.put = volume_alsa_mute_put; 7650 volume_alsa_control_mute.access = 7651 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7652 } 7653 7654 if (!tp_features.mixer_no_level_control) { 7655 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7656 rc = snd_ctl_add(card, ctl_vol); 7657 if (rc < 0) { 7658 pr_err("Failed to create ALSA volume control: %d\n", 7659 rc); 7660 goto err_exit; 7661 } 7662 data->ctl_vol_id = &ctl_vol->id; 7663 } 7664 7665 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7666 rc = snd_ctl_add(card, ctl_mute); 7667 if (rc < 0) { 7668 pr_err("Failed to create ALSA mute control: %d\n", rc); 7669 goto err_exit; 7670 } 7671 data->ctl_mute_id = &ctl_mute->id; 7672 7673 rc = snd_card_register(card); 7674 if (rc < 0) { 7675 pr_err("Failed to register ALSA card: %d\n", rc); 7676 goto err_exit; 7677 } 7678 7679 alsa_card = card; 7680 return 0; 7681 7682 err_exit: 7683 snd_card_free(card); 7684 return 1; 7685 } 7686 7687 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7688 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7689 7690 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7691 /* Whitelist volume level on all IBM by default */ 7692 { .vendor = PCI_VENDOR_ID_IBM, 7693 .bios = TPACPI_MATCH_ANY, 7694 .ec = TPACPI_MATCH_ANY, 7695 .quirks = TPACPI_VOL_Q_LEVEL }, 7696 7697 /* Lenovo models with volume control (needs confirmation) */ 7698 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7699 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7700 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7701 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7702 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7703 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7704 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7705 7706 /* Whitelist mute-only on all Lenovo by default */ 7707 { .vendor = PCI_VENDOR_ID_LENOVO, 7708 .bios = TPACPI_MATCH_ANY, 7709 .ec = TPACPI_MATCH_ANY, 7710 .quirks = TPACPI_VOL_Q_MUTEONLY } 7711 }; 7712 7713 static int __init volume_init(struct ibm_init_struct *iibm) 7714 { 7715 unsigned long quirks; 7716 int rc; 7717 7718 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7719 7720 mutex_init(&volume_mutex); 7721 7722 /* 7723 * Check for module parameter bogosity, note that we 7724 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7725 * able to detect "unspecified" 7726 */ 7727 if (volume_mode > TPACPI_VOL_MODE_MAX) 7728 return -EINVAL; 7729 7730 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7731 pr_err("UCMS step volume mode not implemented, please contact %s\n", 7732 TPACPI_MAIL); 7733 return 1; 7734 } 7735 7736 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7737 return -EINVAL; 7738 7739 /* 7740 * The ALSA mixer is our primary interface. 7741 * When disabled, don't install the subdriver at all 7742 */ 7743 if (!alsa_enable) { 7744 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7745 "ALSA mixer disabled by parameter, not loading volume subdriver...\n"); 7746 return 1; 7747 } 7748 7749 quirks = tpacpi_check_quirks(volume_quirk_table, 7750 ARRAY_SIZE(volume_quirk_table)); 7751 7752 switch (volume_capabilities) { 7753 case TPACPI_VOL_CAP_AUTO: 7754 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7755 tp_features.mixer_no_level_control = 1; 7756 else if (quirks & TPACPI_VOL_Q_LEVEL) 7757 tp_features.mixer_no_level_control = 0; 7758 else 7759 return 1; /* no mixer */ 7760 break; 7761 case TPACPI_VOL_CAP_VOLMUTE: 7762 tp_features.mixer_no_level_control = 0; 7763 break; 7764 case TPACPI_VOL_CAP_MUTEONLY: 7765 tp_features.mixer_no_level_control = 1; 7766 break; 7767 default: 7768 return 1; 7769 } 7770 7771 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7772 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7773 "using user-supplied volume_capabilities=%d\n", 7774 volume_capabilities); 7775 7776 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7777 volume_mode == TPACPI_VOL_MODE_MAX) { 7778 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7779 7780 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7781 "driver auto-selected volume_mode=%d\n", 7782 volume_mode); 7783 } else { 7784 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7785 "using user-supplied volume_mode=%d\n", 7786 volume_mode); 7787 } 7788 7789 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7790 "mute is supported, volume control is %s\n", 7791 str_supported(!tp_features.mixer_no_level_control)); 7792 7793 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7794 software_mute_active = true; 7795 } else { 7796 rc = volume_create_alsa_mixer(); 7797 if (rc) { 7798 pr_err("Could not create the ALSA mixer interface\n"); 7799 return rc; 7800 } 7801 7802 pr_info("Console audio control enabled, mode: %s\n", 7803 (volume_control_allowed) ? 7804 "override (read/write)" : 7805 "monitor (read only)"); 7806 } 7807 7808 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7809 "registering volume hotkeys as change notification\n"); 7810 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7811 | TP_ACPI_HKEY_VOLUP_MASK 7812 | TP_ACPI_HKEY_VOLDWN_MASK 7813 | TP_ACPI_HKEY_MUTE_MASK); 7814 7815 return 0; 7816 } 7817 7818 static int volume_read(struct seq_file *m) 7819 { 7820 u8 status; 7821 7822 if (volume_get_status(&status) < 0) { 7823 seq_printf(m, "level:\t\tunreadable\n"); 7824 } else { 7825 if (tp_features.mixer_no_level_control) 7826 seq_printf(m, "level:\t\tunsupported\n"); 7827 else 7828 seq_printf(m, "level:\t\t%d\n", 7829 status & TP_EC_AUDIO_LVL_MSK); 7830 7831 seq_printf(m, "mute:\t\t%s\n", 7832 onoff(status, TP_EC_AUDIO_MUTESW)); 7833 7834 if (volume_control_allowed) { 7835 seq_printf(m, "commands:\tunmute, mute\n"); 7836 if (!tp_features.mixer_no_level_control) { 7837 seq_printf(m, "commands:\tup, down\n"); 7838 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7839 TP_EC_VOLUME_MAX); 7840 } 7841 } 7842 } 7843 7844 return 0; 7845 } 7846 7847 static int volume_write(char *buf) 7848 { 7849 u8 s; 7850 u8 new_level, new_mute; 7851 int l; 7852 char *cmd; 7853 int rc; 7854 7855 /* 7856 * We do allow volume control at driver startup, so that the 7857 * user can set initial state through the volume=... parameter hack. 7858 */ 7859 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7860 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7861 tp_warned.volume_ctrl_forbidden = 1; 7862 pr_notice("Console audio control in monitor mode, changes are not allowed\n"); 7863 pr_notice("Use the volume_control=1 module parameter to enable volume control\n"); 7864 } 7865 return -EPERM; 7866 } 7867 7868 rc = volume_get_status(&s); 7869 if (rc < 0) 7870 return rc; 7871 7872 new_level = s & TP_EC_AUDIO_LVL_MSK; 7873 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7874 7875 while ((cmd = next_cmd(&buf))) { 7876 if (!tp_features.mixer_no_level_control) { 7877 if (strlencmp(cmd, "up") == 0) { 7878 if (new_mute) 7879 new_mute = 0; 7880 else if (new_level < TP_EC_VOLUME_MAX) 7881 new_level++; 7882 continue; 7883 } else if (strlencmp(cmd, "down") == 0) { 7884 if (new_mute) 7885 new_mute = 0; 7886 else if (new_level > 0) 7887 new_level--; 7888 continue; 7889 } else if (sscanf(cmd, "level %u", &l) == 1 && 7890 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7891 new_level = l; 7892 continue; 7893 } 7894 } 7895 if (strlencmp(cmd, "mute") == 0) 7896 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7897 else if (strlencmp(cmd, "unmute") == 0) 7898 new_mute = 0; 7899 else 7900 return -EINVAL; 7901 } 7902 7903 if (tp_features.mixer_no_level_control) { 7904 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7905 new_mute ? "" : "un"); 7906 rc = volume_set_mute(!!new_mute); 7907 } else { 7908 tpacpi_disclose_usertask("procfs volume", 7909 "%smute and set level to %d\n", 7910 new_mute ? "" : "un", new_level); 7911 rc = volume_set_status(new_mute | new_level); 7912 } 7913 volume_alsa_notify_change(); 7914 7915 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7916 } 7917 7918 static struct ibm_struct volume_driver_data = { 7919 .name = "volume", 7920 .read = volume_read, 7921 .write = volume_write, 7922 .exit = volume_exit, 7923 .suspend = volume_suspend, 7924 .resume = volume_resume, 7925 .shutdown = volume_shutdown, 7926 }; 7927 7928 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7929 7930 #define alsa_card NULL 7931 7932 static inline void volume_alsa_notify_change(void) 7933 { 7934 } 7935 7936 static int __init volume_init(struct ibm_init_struct *iibm) 7937 { 7938 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7939 7940 return 1; 7941 } 7942 7943 static struct ibm_struct volume_driver_data = { 7944 .name = "volume", 7945 }; 7946 7947 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7948 7949 /************************************************************************* 7950 * Fan subdriver 7951 */ 7952 7953 /* 7954 * FAN ACCESS MODES 7955 * 7956 * TPACPI_FAN_RD_ACPI_GFAN: 7957 * ACPI GFAN method: returns fan level 7958 * 7959 * see TPACPI_FAN_WR_ACPI_SFAN 7960 * EC 0x2f (HFSP) not available if GFAN exists 7961 * 7962 * TPACPI_FAN_WR_ACPI_SFAN: 7963 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7964 * 7965 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7966 * it for writing. 7967 * 7968 * TPACPI_FAN_WR_TPEC: 7969 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7970 * Supported on almost all ThinkPads 7971 * 7972 * Fan speed changes of any sort (including those caused by the 7973 * disengaged mode) are usually done slowly by the firmware as the 7974 * maximum amount of fan duty cycle change per second seems to be 7975 * limited. 7976 * 7977 * Reading is not available if GFAN exists. 7978 * Writing is not available if SFAN exists. 7979 * 7980 * Bits 7981 * 7 automatic mode engaged; 7982 * (default operation mode of the ThinkPad) 7983 * fan level is ignored in this mode. 7984 * 6 full speed mode (takes precedence over bit 7); 7985 * not available on all thinkpads. May disable 7986 * the tachometer while the fan controller ramps up 7987 * the speed (which can take up to a few *minutes*). 7988 * Speeds up fan to 100% duty-cycle, which is far above 7989 * the standard RPM levels. It is not impossible that 7990 * it could cause hardware damage. 7991 * 5-3 unused in some models. Extra bits for fan level 7992 * in others, but still useless as all values above 7993 * 7 map to the same speed as level 7 in these models. 7994 * 2-0 fan level (0..7 usually) 7995 * 0x00 = stop 7996 * 0x07 = max (set when temperatures critical) 7997 * Some ThinkPads may have other levels, see 7998 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7999 * 8000 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 8001 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 8002 * does so, its initial value is meaningless (0x07). 8003 * 8004 * For firmware bugs, refer to: 8005 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 8006 * 8007 * ---- 8008 * 8009 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 8010 * Main fan tachometer reading (in RPM) 8011 * 8012 * This register is present on all ThinkPads with a new-style EC, and 8013 * it is known not to be present on the A21m/e, and T22, as there is 8014 * something else in offset 0x84 according to the ACPI DSDT. Other 8015 * ThinkPads from this same time period (and earlier) probably lack the 8016 * tachometer as well. 8017 * 8018 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 8019 * was never fixed by IBM to report the EC firmware version string 8020 * probably support the tachometer (like the early X models), so 8021 * detecting it is quite hard. We need more data to know for sure. 8022 * 8023 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 8024 * might result. 8025 * 8026 * FIRMWARE BUG: may go stale while the EC is switching to full speed 8027 * mode. 8028 * 8029 * For firmware bugs, refer to: 8030 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 8031 * 8032 * ---- 8033 * 8034 * ThinkPad EC register 0x31 bit 0 (only on select models) 8035 * 8036 * When bit 0 of EC register 0x31 is zero, the tachometer registers 8037 * show the speed of the main fan. When bit 0 of EC register 0x31 8038 * is one, the tachometer registers show the speed of the auxiliary 8039 * fan. 8040 * 8041 * Fan control seems to affect both fans, regardless of the state 8042 * of this bit. 8043 * 8044 * So far, only the firmware for the X60/X61 non-tablet versions 8045 * seem to support this (firmware TP-7M). 8046 * 8047 * TPACPI_FAN_WR_ACPI_FANS: 8048 * ThinkPad X31, X40, X41. Not available in the X60. 8049 * 8050 * FANS ACPI handle: takes three arguments: low speed, medium speed, 8051 * high speed. ACPI DSDT seems to map these three speeds to levels 8052 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 8053 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 8054 * 8055 * The speeds are stored on handles 8056 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 8057 * 8058 * There are three default speed sets, accessible as handles: 8059 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 8060 * 8061 * ACPI DSDT switches which set is in use depending on various 8062 * factors. 8063 * 8064 * TPACPI_FAN_WR_TPEC is also available and should be used to 8065 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 8066 * but the ACPI tables just mention level 7. 8067 */ 8068 8069 enum { /* Fan control constants */ 8070 fan_status_offset = 0x2f, /* EC register 0x2f */ 8071 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 8072 * 0x84 must be read before 0x85 */ 8073 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 8074 bit 0 selects which fan is active */ 8075 8076 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 8077 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 8078 8079 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 8080 }; 8081 8082 enum fan_status_access_mode { 8083 TPACPI_FAN_NONE = 0, /* No fan status or control */ 8084 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 8085 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 8086 }; 8087 8088 enum fan_control_access_mode { 8089 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 8090 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 8091 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 8092 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 8093 }; 8094 8095 enum fan_control_commands { 8096 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 8097 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 8098 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 8099 * and also watchdog cmd */ 8100 }; 8101 8102 static bool fan_control_allowed; 8103 8104 static enum fan_status_access_mode fan_status_access_mode; 8105 static enum fan_control_access_mode fan_control_access_mode; 8106 static enum fan_control_commands fan_control_commands; 8107 8108 static u8 fan_control_initial_status; 8109 static u8 fan_control_desired_level; 8110 static u8 fan_control_resume_level; 8111 static int fan_watchdog_maxinterval; 8112 8113 static struct mutex fan_mutex; 8114 8115 static void fan_watchdog_fire(struct work_struct *ignored); 8116 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 8117 8118 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 8119 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 8120 "\\FSPD", /* 600e/x, 770e, 770x */ 8121 ); /* all others */ 8122 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 8123 "JFNS", /* 770x-JL */ 8124 ); /* all others */ 8125 8126 /* 8127 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 8128 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 8129 * be in auto mode (0x80). 8130 * 8131 * This is corrected by any write to HFSP either by the driver, or 8132 * by the firmware. 8133 * 8134 * We assume 0x07 really means auto mode while this quirk is active, 8135 * as this is far more likely than the ThinkPad being in level 7, 8136 * which is only used by the firmware during thermal emergencies. 8137 * 8138 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 8139 * TP-70 (T43, R52), which are known to be buggy. 8140 */ 8141 8142 static void fan_quirk1_setup(void) 8143 { 8144 if (fan_control_initial_status == 0x07) { 8145 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n"); 8146 tp_features.fan_ctrl_status_undef = 1; 8147 } 8148 } 8149 8150 static void fan_quirk1_handle(u8 *fan_status) 8151 { 8152 if (unlikely(tp_features.fan_ctrl_status_undef)) { 8153 if (*fan_status != fan_control_initial_status) { 8154 /* something changed the HFSP regisnter since 8155 * driver init time, so it is not undefined 8156 * anymore */ 8157 tp_features.fan_ctrl_status_undef = 0; 8158 } else { 8159 /* Return most likely status. In fact, it 8160 * might be the only possible status */ 8161 *fan_status = TP_EC_FAN_AUTO; 8162 } 8163 } 8164 } 8165 8166 /* Select main fan on X60/X61, NOOP on others */ 8167 static bool fan_select_fan1(void) 8168 { 8169 if (tp_features.second_fan) { 8170 u8 val; 8171 8172 if (ec_read(fan_select_offset, &val) < 0) 8173 return false; 8174 val &= 0xFEU; 8175 if (ec_write(fan_select_offset, val) < 0) 8176 return false; 8177 } 8178 return true; 8179 } 8180 8181 /* Select secondary fan on X60/X61 */ 8182 static bool fan_select_fan2(void) 8183 { 8184 u8 val; 8185 8186 if (!tp_features.second_fan) 8187 return false; 8188 8189 if (ec_read(fan_select_offset, &val) < 0) 8190 return false; 8191 val |= 0x01U; 8192 if (ec_write(fan_select_offset, val) < 0) 8193 return false; 8194 8195 return true; 8196 } 8197 8198 /* 8199 * Call with fan_mutex held 8200 */ 8201 static void fan_update_desired_level(u8 status) 8202 { 8203 if ((status & 8204 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8205 if (status > 7) 8206 fan_control_desired_level = 7; 8207 else 8208 fan_control_desired_level = status; 8209 } 8210 } 8211 8212 static int fan_get_status(u8 *status) 8213 { 8214 u8 s; 8215 8216 /* TODO: 8217 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8218 8219 switch (fan_status_access_mode) { 8220 case TPACPI_FAN_RD_ACPI_GFAN: { 8221 /* 570, 600e/x, 770e, 770x */ 8222 int res; 8223 8224 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8225 return -EIO; 8226 8227 if (likely(status)) 8228 *status = res & 0x07; 8229 8230 break; 8231 } 8232 case TPACPI_FAN_RD_TPEC: 8233 /* all except 570, 600e/x, 770e, 770x */ 8234 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8235 return -EIO; 8236 8237 if (likely(status)) { 8238 *status = s; 8239 fan_quirk1_handle(status); 8240 } 8241 8242 break; 8243 8244 default: 8245 return -ENXIO; 8246 } 8247 8248 return 0; 8249 } 8250 8251 static int fan_get_status_safe(u8 *status) 8252 { 8253 int rc; 8254 u8 s; 8255 8256 if (mutex_lock_killable(&fan_mutex)) 8257 return -ERESTARTSYS; 8258 rc = fan_get_status(&s); 8259 if (!rc) 8260 fan_update_desired_level(s); 8261 mutex_unlock(&fan_mutex); 8262 8263 if (rc) 8264 return rc; 8265 if (status) 8266 *status = s; 8267 8268 return 0; 8269 } 8270 8271 static int fan_get_speed(unsigned int *speed) 8272 { 8273 u8 hi, lo; 8274 8275 switch (fan_status_access_mode) { 8276 case TPACPI_FAN_RD_TPEC: 8277 /* all except 570, 600e/x, 770e, 770x */ 8278 if (unlikely(!fan_select_fan1())) 8279 return -EIO; 8280 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8281 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8282 return -EIO; 8283 8284 if (likely(speed)) 8285 *speed = (hi << 8) | lo; 8286 8287 break; 8288 8289 default: 8290 return -ENXIO; 8291 } 8292 8293 return 0; 8294 } 8295 8296 static int fan2_get_speed(unsigned int *speed) 8297 { 8298 u8 hi, lo; 8299 bool rc; 8300 8301 switch (fan_status_access_mode) { 8302 case TPACPI_FAN_RD_TPEC: 8303 /* all except 570, 600e/x, 770e, 770x */ 8304 if (unlikely(!fan_select_fan2())) 8305 return -EIO; 8306 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8307 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8308 fan_select_fan1(); /* play it safe */ 8309 if (rc) 8310 return -EIO; 8311 8312 if (likely(speed)) 8313 *speed = (hi << 8) | lo; 8314 8315 break; 8316 8317 default: 8318 return -ENXIO; 8319 } 8320 8321 return 0; 8322 } 8323 8324 static int fan_set_level(int level) 8325 { 8326 if (!fan_control_allowed) 8327 return -EPERM; 8328 8329 switch (fan_control_access_mode) { 8330 case TPACPI_FAN_WR_ACPI_SFAN: 8331 if (level >= 0 && level <= 7) { 8332 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8333 return -EIO; 8334 } else 8335 return -EINVAL; 8336 break; 8337 8338 case TPACPI_FAN_WR_ACPI_FANS: 8339 case TPACPI_FAN_WR_TPEC: 8340 if (!(level & TP_EC_FAN_AUTO) && 8341 !(level & TP_EC_FAN_FULLSPEED) && 8342 ((level < 0) || (level > 7))) 8343 return -EINVAL; 8344 8345 /* safety net should the EC not support AUTO 8346 * or FULLSPEED mode bits and just ignore them */ 8347 if (level & TP_EC_FAN_FULLSPEED) 8348 level |= 7; /* safety min speed 7 */ 8349 else if (level & TP_EC_FAN_AUTO) 8350 level |= 4; /* safety min speed 4 */ 8351 8352 if (!acpi_ec_write(fan_status_offset, level)) 8353 return -EIO; 8354 else 8355 tp_features.fan_ctrl_status_undef = 0; 8356 break; 8357 8358 default: 8359 return -ENXIO; 8360 } 8361 8362 vdbg_printk(TPACPI_DBG_FAN, 8363 "fan control: set fan control register to 0x%02x\n", level); 8364 return 0; 8365 } 8366 8367 static int fan_set_level_safe(int level) 8368 { 8369 int rc; 8370 8371 if (!fan_control_allowed) 8372 return -EPERM; 8373 8374 if (mutex_lock_killable(&fan_mutex)) 8375 return -ERESTARTSYS; 8376 8377 if (level == TPACPI_FAN_LAST_LEVEL) 8378 level = fan_control_desired_level; 8379 8380 rc = fan_set_level(level); 8381 if (!rc) 8382 fan_update_desired_level(level); 8383 8384 mutex_unlock(&fan_mutex); 8385 return rc; 8386 } 8387 8388 static int fan_set_enable(void) 8389 { 8390 u8 s; 8391 int rc; 8392 8393 if (!fan_control_allowed) 8394 return -EPERM; 8395 8396 if (mutex_lock_killable(&fan_mutex)) 8397 return -ERESTARTSYS; 8398 8399 switch (fan_control_access_mode) { 8400 case TPACPI_FAN_WR_ACPI_FANS: 8401 case TPACPI_FAN_WR_TPEC: 8402 rc = fan_get_status(&s); 8403 if (rc < 0) 8404 break; 8405 8406 /* Don't go out of emergency fan mode */ 8407 if (s != 7) { 8408 s &= 0x07; 8409 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8410 } 8411 8412 if (!acpi_ec_write(fan_status_offset, s)) 8413 rc = -EIO; 8414 else { 8415 tp_features.fan_ctrl_status_undef = 0; 8416 rc = 0; 8417 } 8418 break; 8419 8420 case TPACPI_FAN_WR_ACPI_SFAN: 8421 rc = fan_get_status(&s); 8422 if (rc < 0) 8423 break; 8424 8425 s &= 0x07; 8426 8427 /* Set fan to at least level 4 */ 8428 s |= 4; 8429 8430 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8431 rc = -EIO; 8432 else 8433 rc = 0; 8434 break; 8435 8436 default: 8437 rc = -ENXIO; 8438 } 8439 8440 mutex_unlock(&fan_mutex); 8441 8442 if (!rc) 8443 vdbg_printk(TPACPI_DBG_FAN, 8444 "fan control: set fan control register to 0x%02x\n", 8445 s); 8446 return rc; 8447 } 8448 8449 static int fan_set_disable(void) 8450 { 8451 int rc; 8452 8453 if (!fan_control_allowed) 8454 return -EPERM; 8455 8456 if (mutex_lock_killable(&fan_mutex)) 8457 return -ERESTARTSYS; 8458 8459 rc = 0; 8460 switch (fan_control_access_mode) { 8461 case TPACPI_FAN_WR_ACPI_FANS: 8462 case TPACPI_FAN_WR_TPEC: 8463 if (!acpi_ec_write(fan_status_offset, 0x00)) 8464 rc = -EIO; 8465 else { 8466 fan_control_desired_level = 0; 8467 tp_features.fan_ctrl_status_undef = 0; 8468 } 8469 break; 8470 8471 case TPACPI_FAN_WR_ACPI_SFAN: 8472 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8473 rc = -EIO; 8474 else 8475 fan_control_desired_level = 0; 8476 break; 8477 8478 default: 8479 rc = -ENXIO; 8480 } 8481 8482 if (!rc) 8483 vdbg_printk(TPACPI_DBG_FAN, 8484 "fan control: set fan control register to 0\n"); 8485 8486 mutex_unlock(&fan_mutex); 8487 return rc; 8488 } 8489 8490 static int fan_set_speed(int speed) 8491 { 8492 int rc; 8493 8494 if (!fan_control_allowed) 8495 return -EPERM; 8496 8497 if (mutex_lock_killable(&fan_mutex)) 8498 return -ERESTARTSYS; 8499 8500 rc = 0; 8501 switch (fan_control_access_mode) { 8502 case TPACPI_FAN_WR_ACPI_FANS: 8503 if (speed >= 0 && speed <= 65535) { 8504 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8505 speed, speed, speed)) 8506 rc = -EIO; 8507 } else 8508 rc = -EINVAL; 8509 break; 8510 8511 default: 8512 rc = -ENXIO; 8513 } 8514 8515 mutex_unlock(&fan_mutex); 8516 return rc; 8517 } 8518 8519 static void fan_watchdog_reset(void) 8520 { 8521 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8522 return; 8523 8524 if (fan_watchdog_maxinterval > 0 && 8525 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8526 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8527 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8528 else 8529 cancel_delayed_work(&fan_watchdog_task); 8530 } 8531 8532 static void fan_watchdog_fire(struct work_struct *ignored) 8533 { 8534 int rc; 8535 8536 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8537 return; 8538 8539 pr_notice("fan watchdog: enabling fan\n"); 8540 rc = fan_set_enable(); 8541 if (rc < 0) { 8542 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n", 8543 rc); 8544 /* reschedule for later */ 8545 fan_watchdog_reset(); 8546 } 8547 } 8548 8549 /* 8550 * SYSFS fan layout: hwmon compatible (device) 8551 * 8552 * pwm*_enable: 8553 * 0: "disengaged" mode 8554 * 1: manual mode 8555 * 2: native EC "auto" mode (recommended, hardware default) 8556 * 8557 * pwm*: set speed in manual mode, ignored otherwise. 8558 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8559 * interpolation. 8560 * 8561 * fan*_input: tachometer reading, RPM 8562 * 8563 * 8564 * SYSFS fan layout: extensions 8565 * 8566 * fan_watchdog (driver): 8567 * fan watchdog interval in seconds, 0 disables (default), max 120 8568 */ 8569 8570 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8571 static ssize_t fan_pwm1_enable_show(struct device *dev, 8572 struct device_attribute *attr, 8573 char *buf) 8574 { 8575 int res, mode; 8576 u8 status; 8577 8578 res = fan_get_status_safe(&status); 8579 if (res) 8580 return res; 8581 8582 if (status & TP_EC_FAN_FULLSPEED) { 8583 mode = 0; 8584 } else if (status & TP_EC_FAN_AUTO) { 8585 mode = 2; 8586 } else 8587 mode = 1; 8588 8589 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8590 } 8591 8592 static ssize_t fan_pwm1_enable_store(struct device *dev, 8593 struct device_attribute *attr, 8594 const char *buf, size_t count) 8595 { 8596 unsigned long t; 8597 int res, level; 8598 8599 if (parse_strtoul(buf, 2, &t)) 8600 return -EINVAL; 8601 8602 tpacpi_disclose_usertask("hwmon pwm1_enable", 8603 "set fan mode to %lu\n", t); 8604 8605 switch (t) { 8606 case 0: 8607 level = TP_EC_FAN_FULLSPEED; 8608 break; 8609 case 1: 8610 level = TPACPI_FAN_LAST_LEVEL; 8611 break; 8612 case 2: 8613 level = TP_EC_FAN_AUTO; 8614 break; 8615 case 3: 8616 /* reserved for software-controlled auto mode */ 8617 return -ENOSYS; 8618 default: 8619 return -EINVAL; 8620 } 8621 8622 res = fan_set_level_safe(level); 8623 if (res == -ENXIO) 8624 return -EINVAL; 8625 else if (res < 0) 8626 return res; 8627 8628 fan_watchdog_reset(); 8629 8630 return count; 8631 } 8632 8633 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8634 fan_pwm1_enable_show, fan_pwm1_enable_store); 8635 8636 /* sysfs fan pwm1 ------------------------------------------------------ */ 8637 static ssize_t fan_pwm1_show(struct device *dev, 8638 struct device_attribute *attr, 8639 char *buf) 8640 { 8641 int res; 8642 u8 status; 8643 8644 res = fan_get_status_safe(&status); 8645 if (res) 8646 return res; 8647 8648 if ((status & 8649 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8650 status = fan_control_desired_level; 8651 8652 if (status > 7) 8653 status = 7; 8654 8655 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8656 } 8657 8658 static ssize_t fan_pwm1_store(struct device *dev, 8659 struct device_attribute *attr, 8660 const char *buf, size_t count) 8661 { 8662 unsigned long s; 8663 int rc; 8664 u8 status, newlevel; 8665 8666 if (parse_strtoul(buf, 255, &s)) 8667 return -EINVAL; 8668 8669 tpacpi_disclose_usertask("hwmon pwm1", 8670 "set fan speed to %lu\n", s); 8671 8672 /* scale down from 0-255 to 0-7 */ 8673 newlevel = (s >> 5) & 0x07; 8674 8675 if (mutex_lock_killable(&fan_mutex)) 8676 return -ERESTARTSYS; 8677 8678 rc = fan_get_status(&status); 8679 if (!rc && (status & 8680 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8681 rc = fan_set_level(newlevel); 8682 if (rc == -ENXIO) 8683 rc = -EINVAL; 8684 else if (!rc) { 8685 fan_update_desired_level(newlevel); 8686 fan_watchdog_reset(); 8687 } 8688 } 8689 8690 mutex_unlock(&fan_mutex); 8691 return (rc) ? rc : count; 8692 } 8693 8694 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8695 8696 /* sysfs fan fan1_input ------------------------------------------------ */ 8697 static ssize_t fan_fan1_input_show(struct device *dev, 8698 struct device_attribute *attr, 8699 char *buf) 8700 { 8701 int res; 8702 unsigned int speed; 8703 8704 res = fan_get_speed(&speed); 8705 if (res < 0) 8706 return res; 8707 8708 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8709 } 8710 8711 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8712 8713 /* sysfs fan fan2_input ------------------------------------------------ */ 8714 static ssize_t fan_fan2_input_show(struct device *dev, 8715 struct device_attribute *attr, 8716 char *buf) 8717 { 8718 int res; 8719 unsigned int speed; 8720 8721 res = fan2_get_speed(&speed); 8722 if (res < 0) 8723 return res; 8724 8725 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8726 } 8727 8728 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8729 8730 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8731 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf) 8732 { 8733 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8734 } 8735 8736 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf, 8737 size_t count) 8738 { 8739 unsigned long t; 8740 8741 if (parse_strtoul(buf, 120, &t)) 8742 return -EINVAL; 8743 8744 if (!fan_control_allowed) 8745 return -EPERM; 8746 8747 fan_watchdog_maxinterval = t; 8748 fan_watchdog_reset(); 8749 8750 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8751 8752 return count; 8753 } 8754 static DRIVER_ATTR_RW(fan_watchdog); 8755 8756 /* --------------------------------------------------------------------- */ 8757 static struct attribute *fan_attributes[] = { 8758 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8759 &dev_attr_fan1_input.attr, 8760 NULL, /* for fan2_input */ 8761 NULL 8762 }; 8763 8764 static const struct attribute_group fan_attr_group = { 8765 .attrs = fan_attributes, 8766 }; 8767 8768 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8769 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8770 8771 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8772 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1), 8773 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1), 8774 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1), 8775 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1), 8776 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN), 8777 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN), 8778 }; 8779 8780 static int __init fan_init(struct ibm_init_struct *iibm) 8781 { 8782 int rc; 8783 unsigned long quirks; 8784 8785 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8786 "initializing fan subdriver\n"); 8787 8788 mutex_init(&fan_mutex); 8789 fan_status_access_mode = TPACPI_FAN_NONE; 8790 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8791 fan_control_commands = 0; 8792 fan_watchdog_maxinterval = 0; 8793 tp_features.fan_ctrl_status_undef = 0; 8794 tp_features.second_fan = 0; 8795 fan_control_desired_level = 7; 8796 8797 if (tpacpi_is_ibm()) { 8798 TPACPI_ACPIHANDLE_INIT(fans); 8799 TPACPI_ACPIHANDLE_INIT(gfan); 8800 TPACPI_ACPIHANDLE_INIT(sfan); 8801 } 8802 8803 quirks = tpacpi_check_quirks(fan_quirk_table, 8804 ARRAY_SIZE(fan_quirk_table)); 8805 8806 if (gfan_handle) { 8807 /* 570, 600e/x, 770e, 770x */ 8808 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8809 } else { 8810 /* all other ThinkPads: note that even old-style 8811 * ThinkPad ECs supports the fan control register */ 8812 if (likely(acpi_ec_read(fan_status_offset, 8813 &fan_control_initial_status))) { 8814 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8815 if (quirks & TPACPI_FAN_Q1) 8816 fan_quirk1_setup(); 8817 if (quirks & TPACPI_FAN_2FAN) { 8818 tp_features.second_fan = 1; 8819 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8820 "secondary fan support enabled\n"); 8821 } 8822 } else { 8823 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n"); 8824 return 1; 8825 } 8826 } 8827 8828 if (sfan_handle) { 8829 /* 570, 770x-JL */ 8830 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8831 fan_control_commands |= 8832 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8833 } else { 8834 if (!gfan_handle) { 8835 /* gfan without sfan means no fan control */ 8836 /* all other models implement TP EC 0x2f control */ 8837 8838 if (fans_handle) { 8839 /* X31, X40, X41 */ 8840 fan_control_access_mode = 8841 TPACPI_FAN_WR_ACPI_FANS; 8842 fan_control_commands |= 8843 TPACPI_FAN_CMD_SPEED | 8844 TPACPI_FAN_CMD_LEVEL | 8845 TPACPI_FAN_CMD_ENABLE; 8846 } else { 8847 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8848 fan_control_commands |= 8849 TPACPI_FAN_CMD_LEVEL | 8850 TPACPI_FAN_CMD_ENABLE; 8851 } 8852 } 8853 } 8854 8855 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8856 "fan is %s, modes %d, %d\n", 8857 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8858 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8859 fan_status_access_mode, fan_control_access_mode); 8860 8861 /* fan control master switch */ 8862 if (!fan_control_allowed) { 8863 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8864 fan_control_commands = 0; 8865 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8866 "fan control features disabled by parameter\n"); 8867 } 8868 8869 /* update fan_control_desired_level */ 8870 if (fan_status_access_mode != TPACPI_FAN_NONE) 8871 fan_get_status_safe(NULL); 8872 8873 if (fan_status_access_mode != TPACPI_FAN_NONE || 8874 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8875 if (tp_features.second_fan) { 8876 /* attach second fan tachometer */ 8877 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8878 &dev_attr_fan2_input.attr; 8879 } 8880 rc = sysfs_create_group(&tpacpi_hwmon->kobj, 8881 &fan_attr_group); 8882 if (rc < 0) 8883 return rc; 8884 8885 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8886 &driver_attr_fan_watchdog); 8887 if (rc < 0) { 8888 sysfs_remove_group(&tpacpi_hwmon->kobj, 8889 &fan_attr_group); 8890 return rc; 8891 } 8892 return 0; 8893 } else 8894 return 1; 8895 } 8896 8897 static void fan_exit(void) 8898 { 8899 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8900 "cancelling any pending fan watchdog tasks\n"); 8901 8902 /* FIXME: can we really do this unconditionally? */ 8903 sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group); 8904 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8905 &driver_attr_fan_watchdog); 8906 8907 cancel_delayed_work(&fan_watchdog_task); 8908 flush_workqueue(tpacpi_wq); 8909 } 8910 8911 static void fan_suspend(void) 8912 { 8913 int rc; 8914 8915 if (!fan_control_allowed) 8916 return; 8917 8918 /* Store fan status in cache */ 8919 fan_control_resume_level = 0; 8920 rc = fan_get_status_safe(&fan_control_resume_level); 8921 if (rc < 0) 8922 pr_notice("failed to read fan level for later restore during resume: %d\n", 8923 rc); 8924 8925 /* if it is undefined, don't attempt to restore it. 8926 * KEEP THIS LAST */ 8927 if (tp_features.fan_ctrl_status_undef) 8928 fan_control_resume_level = 0; 8929 } 8930 8931 static void fan_resume(void) 8932 { 8933 u8 current_level = 7; 8934 bool do_set = false; 8935 int rc; 8936 8937 /* DSDT *always* updates status on resume */ 8938 tp_features.fan_ctrl_status_undef = 0; 8939 8940 if (!fan_control_allowed || 8941 !fan_control_resume_level || 8942 (fan_get_status_safe(¤t_level) < 0)) 8943 return; 8944 8945 switch (fan_control_access_mode) { 8946 case TPACPI_FAN_WR_ACPI_SFAN: 8947 /* never decrease fan level */ 8948 do_set = (fan_control_resume_level > current_level); 8949 break; 8950 case TPACPI_FAN_WR_ACPI_FANS: 8951 case TPACPI_FAN_WR_TPEC: 8952 /* never decrease fan level, scale is: 8953 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8954 * 8955 * We expect the firmware to set either 7 or AUTO, but we 8956 * handle FULLSPEED out of paranoia. 8957 * 8958 * So, we can safely only restore FULLSPEED or 7, anything 8959 * else could slow the fan. Restoring AUTO is useless, at 8960 * best that's exactly what the DSDT already set (it is the 8961 * slower it uses). 8962 * 8963 * Always keep in mind that the DSDT *will* have set the 8964 * fans to what the vendor supposes is the best level. We 8965 * muck with it only to speed the fan up. 8966 */ 8967 if (fan_control_resume_level != 7 && 8968 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8969 return; 8970 else 8971 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8972 (current_level != fan_control_resume_level); 8973 break; 8974 default: 8975 return; 8976 } 8977 if (do_set) { 8978 pr_notice("restoring fan level to 0x%02x\n", 8979 fan_control_resume_level); 8980 rc = fan_set_level_safe(fan_control_resume_level); 8981 if (rc < 0) 8982 pr_notice("failed to restore fan level: %d\n", rc); 8983 } 8984 } 8985 8986 static int fan_read(struct seq_file *m) 8987 { 8988 int rc; 8989 u8 status; 8990 unsigned int speed = 0; 8991 8992 switch (fan_status_access_mode) { 8993 case TPACPI_FAN_RD_ACPI_GFAN: 8994 /* 570, 600e/x, 770e, 770x */ 8995 rc = fan_get_status_safe(&status); 8996 if (rc < 0) 8997 return rc; 8998 8999 seq_printf(m, "status:\t\t%s\n" 9000 "level:\t\t%d\n", 9001 (status != 0) ? "enabled" : "disabled", status); 9002 break; 9003 9004 case TPACPI_FAN_RD_TPEC: 9005 /* all except 570, 600e/x, 770e, 770x */ 9006 rc = fan_get_status_safe(&status); 9007 if (rc < 0) 9008 return rc; 9009 9010 seq_printf(m, "status:\t\t%s\n", 9011 (status != 0) ? "enabled" : "disabled"); 9012 9013 rc = fan_get_speed(&speed); 9014 if (rc < 0) 9015 return rc; 9016 9017 seq_printf(m, "speed:\t\t%d\n", speed); 9018 9019 if (status & TP_EC_FAN_FULLSPEED) 9020 /* Disengaged mode takes precedence */ 9021 seq_printf(m, "level:\t\tdisengaged\n"); 9022 else if (status & TP_EC_FAN_AUTO) 9023 seq_printf(m, "level:\t\tauto\n"); 9024 else 9025 seq_printf(m, "level:\t\t%d\n", status); 9026 break; 9027 9028 case TPACPI_FAN_NONE: 9029 default: 9030 seq_printf(m, "status:\t\tnot supported\n"); 9031 } 9032 9033 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 9034 seq_printf(m, "commands:\tlevel <level>"); 9035 9036 switch (fan_control_access_mode) { 9037 case TPACPI_FAN_WR_ACPI_SFAN: 9038 seq_printf(m, " (<level> is 0-7)\n"); 9039 break; 9040 9041 default: 9042 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n"); 9043 break; 9044 } 9045 } 9046 9047 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 9048 seq_printf(m, "commands:\tenable, disable\n" 9049 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n"); 9050 9051 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 9052 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n"); 9053 9054 return 0; 9055 } 9056 9057 static int fan_write_cmd_level(const char *cmd, int *rc) 9058 { 9059 int level; 9060 9061 if (strlencmp(cmd, "level auto") == 0) 9062 level = TP_EC_FAN_AUTO; 9063 else if ((strlencmp(cmd, "level disengaged") == 0) | 9064 (strlencmp(cmd, "level full-speed") == 0)) 9065 level = TP_EC_FAN_FULLSPEED; 9066 else if (sscanf(cmd, "level %d", &level) != 1) 9067 return 0; 9068 9069 *rc = fan_set_level_safe(level); 9070 if (*rc == -ENXIO) 9071 pr_err("level command accepted for unsupported access mode %d\n", 9072 fan_control_access_mode); 9073 else if (!*rc) 9074 tpacpi_disclose_usertask("procfs fan", 9075 "set level to %d\n", level); 9076 9077 return 1; 9078 } 9079 9080 static int fan_write_cmd_enable(const char *cmd, int *rc) 9081 { 9082 if (strlencmp(cmd, "enable") != 0) 9083 return 0; 9084 9085 *rc = fan_set_enable(); 9086 if (*rc == -ENXIO) 9087 pr_err("enable command accepted for unsupported access mode %d\n", 9088 fan_control_access_mode); 9089 else if (!*rc) 9090 tpacpi_disclose_usertask("procfs fan", "enable\n"); 9091 9092 return 1; 9093 } 9094 9095 static int fan_write_cmd_disable(const char *cmd, int *rc) 9096 { 9097 if (strlencmp(cmd, "disable") != 0) 9098 return 0; 9099 9100 *rc = fan_set_disable(); 9101 if (*rc == -ENXIO) 9102 pr_err("disable command accepted for unsupported access mode %d\n", 9103 fan_control_access_mode); 9104 else if (!*rc) 9105 tpacpi_disclose_usertask("procfs fan", "disable\n"); 9106 9107 return 1; 9108 } 9109 9110 static int fan_write_cmd_speed(const char *cmd, int *rc) 9111 { 9112 int speed; 9113 9114 /* TODO: 9115 * Support speed <low> <medium> <high> ? */ 9116 9117 if (sscanf(cmd, "speed %d", &speed) != 1) 9118 return 0; 9119 9120 *rc = fan_set_speed(speed); 9121 if (*rc == -ENXIO) 9122 pr_err("speed command accepted for unsupported access mode %d\n", 9123 fan_control_access_mode); 9124 else if (!*rc) 9125 tpacpi_disclose_usertask("procfs fan", 9126 "set speed to %d\n", speed); 9127 9128 return 1; 9129 } 9130 9131 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 9132 { 9133 int interval; 9134 9135 if (sscanf(cmd, "watchdog %d", &interval) != 1) 9136 return 0; 9137 9138 if (interval < 0 || interval > 120) 9139 *rc = -EINVAL; 9140 else { 9141 fan_watchdog_maxinterval = interval; 9142 tpacpi_disclose_usertask("procfs fan", 9143 "set watchdog timer to %d\n", 9144 interval); 9145 } 9146 9147 return 1; 9148 } 9149 9150 static int fan_write(char *buf) 9151 { 9152 char *cmd; 9153 int rc = 0; 9154 9155 while (!rc && (cmd = next_cmd(&buf))) { 9156 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 9157 fan_write_cmd_level(cmd, &rc)) && 9158 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 9159 (fan_write_cmd_enable(cmd, &rc) || 9160 fan_write_cmd_disable(cmd, &rc) || 9161 fan_write_cmd_watchdog(cmd, &rc))) && 9162 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 9163 fan_write_cmd_speed(cmd, &rc)) 9164 ) 9165 rc = -EINVAL; 9166 else if (!rc) 9167 fan_watchdog_reset(); 9168 } 9169 9170 return rc; 9171 } 9172 9173 static struct ibm_struct fan_driver_data = { 9174 .name = "fan", 9175 .read = fan_read, 9176 .write = fan_write, 9177 .exit = fan_exit, 9178 .suspend = fan_suspend, 9179 .resume = fan_resume, 9180 }; 9181 9182 /************************************************************************* 9183 * Mute LED subdriver 9184 */ 9185 9186 #define TPACPI_LED_MAX 2 9187 9188 struct tp_led_table { 9189 acpi_string name; 9190 int on_value; 9191 int off_value; 9192 int state; 9193 }; 9194 9195 static struct tp_led_table led_tables[TPACPI_LED_MAX] = { 9196 [LED_AUDIO_MUTE] = { 9197 .name = "SSMS", 9198 .on_value = 1, 9199 .off_value = 0, 9200 }, 9201 [LED_AUDIO_MICMUTE] = { 9202 .name = "MMTS", 9203 .on_value = 2, 9204 .off_value = 0, 9205 }, 9206 }; 9207 9208 static int mute_led_on_off(struct tp_led_table *t, bool state) 9209 { 9210 acpi_handle temp; 9211 int output; 9212 9213 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9214 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9215 return -EIO; 9216 } 9217 9218 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9219 state ? t->on_value : t->off_value)) 9220 return -EIO; 9221 9222 t->state = state; 9223 return state; 9224 } 9225 9226 static int tpacpi_led_set(int whichled, bool on) 9227 { 9228 struct tp_led_table *t; 9229 9230 t = &led_tables[whichled]; 9231 if (t->state < 0 || t->state == on) 9232 return t->state; 9233 return mute_led_on_off(t, on); 9234 } 9235 9236 static int tpacpi_led_mute_set(struct led_classdev *led_cdev, 9237 enum led_brightness brightness) 9238 { 9239 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF); 9240 } 9241 9242 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev, 9243 enum led_brightness brightness) 9244 { 9245 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF); 9246 } 9247 9248 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = { 9249 [LED_AUDIO_MUTE] = { 9250 .name = "platform::mute", 9251 .max_brightness = 1, 9252 .brightness_set_blocking = tpacpi_led_mute_set, 9253 .default_trigger = "audio-mute", 9254 }, 9255 [LED_AUDIO_MICMUTE] = { 9256 .name = "platform::micmute", 9257 .max_brightness = 1, 9258 .brightness_set_blocking = tpacpi_led_micmute_set, 9259 .default_trigger = "audio-micmute", 9260 }, 9261 }; 9262 9263 static int mute_led_init(struct ibm_init_struct *iibm) 9264 { 9265 acpi_handle temp; 9266 int i, err; 9267 9268 for (i = 0; i < TPACPI_LED_MAX; i++) { 9269 struct tp_led_table *t = &led_tables[i]; 9270 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9271 t->state = -ENODEV; 9272 continue; 9273 } 9274 9275 mute_led_cdev[i].brightness = ledtrig_audio_get(i); 9276 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]); 9277 if (err < 0) { 9278 while (i--) { 9279 if (led_tables[i].state >= 0) 9280 led_classdev_unregister(&mute_led_cdev[i]); 9281 } 9282 return err; 9283 } 9284 } 9285 return 0; 9286 } 9287 9288 static void mute_led_exit(void) 9289 { 9290 int i; 9291 9292 for (i = 0; i < TPACPI_LED_MAX; i++) { 9293 if (led_tables[i].state >= 0) { 9294 led_classdev_unregister(&mute_led_cdev[i]); 9295 tpacpi_led_set(i, false); 9296 } 9297 } 9298 } 9299 9300 static void mute_led_resume(void) 9301 { 9302 int i; 9303 9304 for (i = 0; i < TPACPI_LED_MAX; i++) { 9305 struct tp_led_table *t = &led_tables[i]; 9306 if (t->state >= 0) 9307 mute_led_on_off(t, t->state); 9308 } 9309 } 9310 9311 static struct ibm_struct mute_led_driver_data = { 9312 .name = "mute_led", 9313 .exit = mute_led_exit, 9314 .resume = mute_led_resume, 9315 }; 9316 9317 /* 9318 * Battery Wear Control Driver 9319 * Contact: Ognjen Galic <smclt30p@gmail.com> 9320 */ 9321 9322 /* Metadata */ 9323 9324 #define GET_START "BCTG" 9325 #define SET_START "BCCS" 9326 #define GET_STOP "BCSG" 9327 #define SET_STOP "BCSS" 9328 9329 #define START_ATTR "charge_start_threshold" 9330 #define STOP_ATTR "charge_stop_threshold" 9331 9332 enum { 9333 BAT_ANY = 0, 9334 BAT_PRIMARY = 1, 9335 BAT_SECONDARY = 2 9336 }; 9337 9338 enum { 9339 /* Error condition bit */ 9340 METHOD_ERR = BIT(31), 9341 }; 9342 9343 enum { 9344 /* This is used in the get/set helpers */ 9345 THRESHOLD_START, 9346 THRESHOLD_STOP, 9347 }; 9348 9349 struct tpacpi_battery_data { 9350 int charge_start; 9351 int start_support; 9352 int charge_stop; 9353 int stop_support; 9354 }; 9355 9356 struct tpacpi_battery_driver_data { 9357 struct tpacpi_battery_data batteries[3]; 9358 int individual_addressing; 9359 }; 9360 9361 static struct tpacpi_battery_driver_data battery_info; 9362 9363 /* ACPI helpers/functions/probes */ 9364 9365 /** 9366 * This evaluates a ACPI method call specific to the battery 9367 * ACPI extension. The specifics are that an error is marked 9368 * in the 32rd bit of the response, so we just check that here. 9369 */ 9370 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param) 9371 { 9372 int response; 9373 9374 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) { 9375 acpi_handle_err(hkey_handle, "%s: evaluate failed", method); 9376 return AE_ERROR; 9377 } 9378 if (response & METHOD_ERR) { 9379 acpi_handle_err(hkey_handle, 9380 "%s evaluated but flagged as error", method); 9381 return AE_ERROR; 9382 } 9383 *ret = response; 9384 return AE_OK; 9385 } 9386 9387 static int tpacpi_battery_get(int what, int battery, int *ret) 9388 { 9389 switch (what) { 9390 case THRESHOLD_START: 9391 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery)) 9392 return -ENODEV; 9393 9394 /* The value is in the low 8 bits of the response */ 9395 *ret = *ret & 0xFF; 9396 return 0; 9397 case THRESHOLD_STOP: 9398 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery)) 9399 return -ENODEV; 9400 /* Value is in lower 8 bits */ 9401 *ret = *ret & 0xFF; 9402 /* 9403 * On the stop value, if we return 0 that 9404 * does not make any sense. 0 means Default, which 9405 * means that charging stops at 100%, so we return 9406 * that. 9407 */ 9408 if (*ret == 0) 9409 *ret = 100; 9410 return 0; 9411 default: 9412 pr_crit("wrong parameter: %d", what); 9413 return -EINVAL; 9414 } 9415 } 9416 9417 static int tpacpi_battery_set(int what, int battery, int value) 9418 { 9419 int param, ret; 9420 /* The first 8 bits are the value of the threshold */ 9421 param = value; 9422 /* The battery ID is in bits 8-9, 2 bits */ 9423 param |= battery << 8; 9424 9425 switch (what) { 9426 case THRESHOLD_START: 9427 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) { 9428 pr_err("failed to set charge threshold on battery %d", 9429 battery); 9430 return -ENODEV; 9431 } 9432 return 0; 9433 case THRESHOLD_STOP: 9434 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) { 9435 pr_err("failed to set stop threshold: %d", battery); 9436 return -ENODEV; 9437 } 9438 return 0; 9439 default: 9440 pr_crit("wrong parameter: %d", what); 9441 return -EINVAL; 9442 } 9443 } 9444 9445 static int tpacpi_battery_probe(int battery) 9446 { 9447 int ret = 0; 9448 9449 memset(&battery_info.batteries[battery], 0, 9450 sizeof(battery_info.batteries[battery])); 9451 9452 /* 9453 * 1) Get the current start threshold 9454 * 2) Check for support 9455 * 3) Get the current stop threshold 9456 * 4) Check for support 9457 */ 9458 if (acpi_has_method(hkey_handle, GET_START)) { 9459 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { 9460 pr_err("Error probing battery %d\n", battery); 9461 return -ENODEV; 9462 } 9463 /* Individual addressing is in bit 9 */ 9464 if (ret & BIT(9)) 9465 battery_info.individual_addressing = true; 9466 /* Support is marked in bit 8 */ 9467 if (ret & BIT(8)) 9468 battery_info.batteries[battery].start_support = 1; 9469 else 9470 return -ENODEV; 9471 if (tpacpi_battery_get(THRESHOLD_START, battery, 9472 &battery_info.batteries[battery].charge_start)) { 9473 pr_err("Error probing battery %d\n", battery); 9474 return -ENODEV; 9475 } 9476 } 9477 if (acpi_has_method(hkey_handle, GET_STOP)) { 9478 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) { 9479 pr_err("Error probing battery stop; %d\n", battery); 9480 return -ENODEV; 9481 } 9482 /* Support is marked in bit 8 */ 9483 if (ret & BIT(8)) 9484 battery_info.batteries[battery].stop_support = 1; 9485 else 9486 return -ENODEV; 9487 if (tpacpi_battery_get(THRESHOLD_STOP, battery, 9488 &battery_info.batteries[battery].charge_stop)) { 9489 pr_err("Error probing battery stop: %d\n", battery); 9490 return -ENODEV; 9491 } 9492 } 9493 pr_info("battery %d registered (start %d, stop %d)", 9494 battery, 9495 battery_info.batteries[battery].charge_start, 9496 battery_info.batteries[battery].charge_stop); 9497 9498 return 0; 9499 } 9500 9501 /* General helper functions */ 9502 9503 static int tpacpi_battery_get_id(const char *battery_name) 9504 { 9505 9506 if (strcmp(battery_name, "BAT0") == 0 || 9507 tp_features.battery_force_primary) 9508 return BAT_PRIMARY; 9509 if (strcmp(battery_name, "BAT1") == 0) 9510 return BAT_SECONDARY; 9511 /* 9512 * If for some reason the battery is not BAT0 nor is it 9513 * BAT1, we will assume it's the default, first battery, 9514 * AKA primary. 9515 */ 9516 pr_warn("unknown battery %s, assuming primary", battery_name); 9517 return BAT_PRIMARY; 9518 } 9519 9520 /* sysfs interface */ 9521 9522 static ssize_t tpacpi_battery_store(int what, 9523 struct device *dev, 9524 const char *buf, size_t count) 9525 { 9526 struct power_supply *supply = to_power_supply(dev); 9527 unsigned long value; 9528 int battery, rval; 9529 /* 9530 * Some systems have support for more than 9531 * one battery. If that is the case, 9532 * tpacpi_battery_probe marked that addressing 9533 * them individually is supported, so we do that 9534 * based on the device struct. 9535 * 9536 * On systems that are not supported, we assume 9537 * the primary as most of the ACPI calls fail 9538 * with "Any Battery" as the parameter. 9539 */ 9540 if (battery_info.individual_addressing) 9541 /* BAT_PRIMARY or BAT_SECONDARY */ 9542 battery = tpacpi_battery_get_id(supply->desc->name); 9543 else 9544 battery = BAT_PRIMARY; 9545 9546 rval = kstrtoul(buf, 10, &value); 9547 if (rval) 9548 return rval; 9549 9550 switch (what) { 9551 case THRESHOLD_START: 9552 if (!battery_info.batteries[battery].start_support) 9553 return -ENODEV; 9554 /* valid values are [0, 99] */ 9555 if (value < 0 || value > 99) 9556 return -EINVAL; 9557 if (value > battery_info.batteries[battery].charge_stop) 9558 return -EINVAL; 9559 if (tpacpi_battery_set(THRESHOLD_START, battery, value)) 9560 return -ENODEV; 9561 battery_info.batteries[battery].charge_start = value; 9562 return count; 9563 9564 case THRESHOLD_STOP: 9565 if (!battery_info.batteries[battery].stop_support) 9566 return -ENODEV; 9567 /* valid values are [1, 100] */ 9568 if (value < 1 || value > 100) 9569 return -EINVAL; 9570 if (value < battery_info.batteries[battery].charge_start) 9571 return -EINVAL; 9572 battery_info.batteries[battery].charge_stop = value; 9573 /* 9574 * When 100 is passed to stop, we need to flip 9575 * it to 0 as that the EC understands that as 9576 * "Default", which will charge to 100% 9577 */ 9578 if (value == 100) 9579 value = 0; 9580 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value)) 9581 return -EINVAL; 9582 return count; 9583 default: 9584 pr_crit("Wrong parameter: %d", what); 9585 return -EINVAL; 9586 } 9587 return count; 9588 } 9589 9590 static ssize_t tpacpi_battery_show(int what, 9591 struct device *dev, 9592 char *buf) 9593 { 9594 struct power_supply *supply = to_power_supply(dev); 9595 int ret, battery; 9596 /* 9597 * Some systems have support for more than 9598 * one battery. If that is the case, 9599 * tpacpi_battery_probe marked that addressing 9600 * them individually is supported, so we; 9601 * based on the device struct. 9602 * 9603 * On systems that are not supported, we assume 9604 * the primary as most of the ACPI calls fail 9605 * with "Any Battery" as the parameter. 9606 */ 9607 if (battery_info.individual_addressing) 9608 /* BAT_PRIMARY or BAT_SECONDARY */ 9609 battery = tpacpi_battery_get_id(supply->desc->name); 9610 else 9611 battery = BAT_PRIMARY; 9612 if (tpacpi_battery_get(what, battery, &ret)) 9613 return -ENODEV; 9614 return sprintf(buf, "%d\n", ret); 9615 } 9616 9617 static ssize_t charge_start_threshold_show(struct device *device, 9618 struct device_attribute *attr, 9619 char *buf) 9620 { 9621 return tpacpi_battery_show(THRESHOLD_START, device, buf); 9622 } 9623 9624 static ssize_t charge_stop_threshold_show(struct device *device, 9625 struct device_attribute *attr, 9626 char *buf) 9627 { 9628 return tpacpi_battery_show(THRESHOLD_STOP, device, buf); 9629 } 9630 9631 static ssize_t charge_start_threshold_store(struct device *dev, 9632 struct device_attribute *attr, 9633 const char *buf, size_t count) 9634 { 9635 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count); 9636 } 9637 9638 static ssize_t charge_stop_threshold_store(struct device *dev, 9639 struct device_attribute *attr, 9640 const char *buf, size_t count) 9641 { 9642 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count); 9643 } 9644 9645 static DEVICE_ATTR_RW(charge_start_threshold); 9646 static DEVICE_ATTR_RW(charge_stop_threshold); 9647 9648 static struct attribute *tpacpi_battery_attrs[] = { 9649 &dev_attr_charge_start_threshold.attr, 9650 &dev_attr_charge_stop_threshold.attr, 9651 NULL, 9652 }; 9653 9654 ATTRIBUTE_GROUPS(tpacpi_battery); 9655 9656 /* ACPI battery hooking */ 9657 9658 static int tpacpi_battery_add(struct power_supply *battery) 9659 { 9660 int batteryid = tpacpi_battery_get_id(battery->desc->name); 9661 9662 if (tpacpi_battery_probe(batteryid)) 9663 return -ENODEV; 9664 if (device_add_groups(&battery->dev, tpacpi_battery_groups)) 9665 return -ENODEV; 9666 return 0; 9667 } 9668 9669 static int tpacpi_battery_remove(struct power_supply *battery) 9670 { 9671 device_remove_groups(&battery->dev, tpacpi_battery_groups); 9672 return 0; 9673 } 9674 9675 static struct acpi_battery_hook battery_hook = { 9676 .add_battery = tpacpi_battery_add, 9677 .remove_battery = tpacpi_battery_remove, 9678 .name = "ThinkPad Battery Extension", 9679 }; 9680 9681 /* Subdriver init/exit */ 9682 9683 static const struct tpacpi_quirk battery_quirk_table[] __initconst = { 9684 /* 9685 * Individual addressing is broken on models that expose the 9686 * primary battery as BAT1. 9687 */ 9688 TPACPI_Q_LNV('J', '7', true), /* B5400 */ 9689 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */ 9690 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */ 9691 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */ 9692 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */ 9693 }; 9694 9695 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm) 9696 { 9697 memset(&battery_info, 0, sizeof(battery_info)); 9698 9699 tp_features.battery_force_primary = tpacpi_check_quirks( 9700 battery_quirk_table, 9701 ARRAY_SIZE(battery_quirk_table)); 9702 9703 battery_hook_register(&battery_hook); 9704 return 0; 9705 } 9706 9707 static void tpacpi_battery_exit(void) 9708 { 9709 battery_hook_unregister(&battery_hook); 9710 } 9711 9712 static struct ibm_struct battery_driver_data = { 9713 .name = "battery", 9714 .exit = tpacpi_battery_exit, 9715 }; 9716 9717 /**************************************************************************** 9718 **************************************************************************** 9719 * 9720 * Infrastructure 9721 * 9722 **************************************************************************** 9723 ****************************************************************************/ 9724 9725 /* 9726 * HKEY event callout for other subdrivers go here 9727 * (yes, it is ugly, but it is quick, safe, and gets the job done 9728 */ 9729 static void tpacpi_driver_event(const unsigned int hkey_event) 9730 { 9731 if (ibm_backlight_device) { 9732 switch (hkey_event) { 9733 case TP_HKEY_EV_BRGHT_UP: 9734 case TP_HKEY_EV_BRGHT_DOWN: 9735 tpacpi_brightness_notify_change(); 9736 } 9737 } 9738 if (alsa_card) { 9739 switch (hkey_event) { 9740 case TP_HKEY_EV_VOL_UP: 9741 case TP_HKEY_EV_VOL_DOWN: 9742 case TP_HKEY_EV_VOL_MUTE: 9743 volume_alsa_notify_change(); 9744 } 9745 } 9746 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) { 9747 enum led_brightness brightness; 9748 9749 mutex_lock(&kbdlight_mutex); 9750 9751 /* 9752 * Check the brightness actually changed, setting the brightness 9753 * through kbdlight_set_level() also triggers this event. 9754 */ 9755 brightness = kbdlight_sysfs_get(NULL); 9756 if (kbdlight_brightness != brightness) { 9757 kbdlight_brightness = brightness; 9758 led_classdev_notify_brightness_hw_changed( 9759 &tpacpi_led_kbdlight.led_classdev, brightness); 9760 } 9761 9762 mutex_unlock(&kbdlight_mutex); 9763 } 9764 } 9765 9766 static void hotkey_driver_event(const unsigned int scancode) 9767 { 9768 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9769 } 9770 9771 /* --------------------------------------------------------------------- */ 9772 9773 /* /proc support */ 9774 static struct proc_dir_entry *proc_dir; 9775 9776 /* 9777 * Module and infrastructure proble, init and exit handling 9778 */ 9779 9780 static bool force_load; 9781 9782 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9783 static const char * __init str_supported(int is_supported) 9784 { 9785 static char text_unsupported[] __initdata = "not supported"; 9786 9787 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9788 } 9789 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9790 9791 static void ibm_exit(struct ibm_struct *ibm) 9792 { 9793 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9794 9795 list_del_init(&ibm->all_drivers); 9796 9797 if (ibm->flags.acpi_notify_installed) { 9798 dbg_printk(TPACPI_DBG_EXIT, 9799 "%s: acpi_remove_notify_handler\n", ibm->name); 9800 BUG_ON(!ibm->acpi); 9801 acpi_remove_notify_handler(*ibm->acpi->handle, 9802 ibm->acpi->type, 9803 dispatch_acpi_notify); 9804 ibm->flags.acpi_notify_installed = 0; 9805 } 9806 9807 if (ibm->flags.proc_created) { 9808 dbg_printk(TPACPI_DBG_EXIT, 9809 "%s: remove_proc_entry\n", ibm->name); 9810 remove_proc_entry(ibm->name, proc_dir); 9811 ibm->flags.proc_created = 0; 9812 } 9813 9814 if (ibm->flags.acpi_driver_registered) { 9815 dbg_printk(TPACPI_DBG_EXIT, 9816 "%s: acpi_bus_unregister_driver\n", ibm->name); 9817 BUG_ON(!ibm->acpi); 9818 acpi_bus_unregister_driver(ibm->acpi->driver); 9819 kfree(ibm->acpi->driver); 9820 ibm->acpi->driver = NULL; 9821 ibm->flags.acpi_driver_registered = 0; 9822 } 9823 9824 if (ibm->flags.init_called && ibm->exit) { 9825 ibm->exit(); 9826 ibm->flags.init_called = 0; 9827 } 9828 9829 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9830 } 9831 9832 static int __init ibm_init(struct ibm_init_struct *iibm) 9833 { 9834 int ret; 9835 struct ibm_struct *ibm = iibm->data; 9836 struct proc_dir_entry *entry; 9837 9838 BUG_ON(ibm == NULL); 9839 9840 INIT_LIST_HEAD(&ibm->all_drivers); 9841 9842 if (ibm->flags.experimental && !experimental) 9843 return 0; 9844 9845 dbg_printk(TPACPI_DBG_INIT, 9846 "probing for %s\n", ibm->name); 9847 9848 if (iibm->init) { 9849 ret = iibm->init(iibm); 9850 if (ret > 0) 9851 return 0; /* probe failed */ 9852 if (ret) 9853 return ret; 9854 9855 ibm->flags.init_called = 1; 9856 } 9857 9858 if (ibm->acpi) { 9859 if (ibm->acpi->hid) { 9860 ret = register_tpacpi_subdriver(ibm); 9861 if (ret) 9862 goto err_out; 9863 } 9864 9865 if (ibm->acpi->notify) { 9866 ret = setup_acpi_notify(ibm); 9867 if (ret == -ENODEV) { 9868 pr_notice("disabling subdriver %s\n", 9869 ibm->name); 9870 ret = 0; 9871 goto err_out; 9872 } 9873 if (ret < 0) 9874 goto err_out; 9875 } 9876 } 9877 9878 dbg_printk(TPACPI_DBG_INIT, 9879 "%s installed\n", ibm->name); 9880 9881 if (ibm->read) { 9882 umode_t mode = iibm->base_procfs_mode; 9883 9884 if (!mode) 9885 mode = S_IRUGO; 9886 if (ibm->write) 9887 mode |= S_IWUSR; 9888 entry = proc_create_data(ibm->name, mode, proc_dir, 9889 &dispatch_proc_fops, ibm); 9890 if (!entry) { 9891 pr_err("unable to create proc entry %s\n", ibm->name); 9892 ret = -ENODEV; 9893 goto err_out; 9894 } 9895 ibm->flags.proc_created = 1; 9896 } 9897 9898 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9899 9900 return 0; 9901 9902 err_out: 9903 dbg_printk(TPACPI_DBG_INIT, 9904 "%s: at error exit path with result %d\n", 9905 ibm->name, ret); 9906 9907 ibm_exit(ibm); 9908 return (ret < 0) ? ret : 0; 9909 } 9910 9911 /* Probing */ 9912 9913 static char __init tpacpi_parse_fw_id(const char * const s, 9914 u32 *model, u16 *release) 9915 { 9916 int i; 9917 9918 if (!s || strlen(s) < 8) 9919 goto invalid; 9920 9921 for (i = 0; i < 8; i++) 9922 if (!((s[i] >= '0' && s[i] <= '9') || 9923 (s[i] >= 'A' && s[i] <= 'Z'))) 9924 goto invalid; 9925 9926 /* 9927 * Most models: xxyTkkWW (#.##c) 9928 * Ancient 570/600 and -SL lacks (#.##c) 9929 */ 9930 if (s[3] == 'T' || s[3] == 'N') { 9931 *model = TPID(s[0], s[1]); 9932 *release = TPVER(s[4], s[5]); 9933 return s[2]; 9934 9935 /* New models: xxxyTkkW (#.##c); T550 and some others */ 9936 } else if (s[4] == 'T' || s[4] == 'N') { 9937 *model = TPID3(s[0], s[1], s[2]); 9938 *release = TPVER(s[5], s[6]); 9939 return s[3]; 9940 } 9941 9942 invalid: 9943 return '\0'; 9944 } 9945 9946 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private) 9947 { 9948 char *ec_fw_string = (char *) private; 9949 const char *dmi_data = (const char *)dm; 9950 /* 9951 * ThinkPad Embedded Controller Program Table on newer models 9952 * 9953 * Offset | Name | Width | Description 9954 * ---------------------------------------------------- 9955 * 0x00 | Type | BYTE | 0x8C 9956 * 0x01 | Length | BYTE | 9957 * 0x02 | Handle | WORD | Varies 9958 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO" 9959 * 0x0A | OEM struct offset | BYTE | 0x0B 9960 * 0x0B | OEM struct number | BYTE | 0x07, for this structure 9961 * 0x0C | OEM struct revision | BYTE | 0x01, for this format 9962 * 0x0D | ECP version ID | STR ID | 9963 * 0x0E | ECP release date | STR ID | 9964 */ 9965 9966 /* Return if data structure not match */ 9967 if (dm->type != 140 || dm->length < 0x0F || 9968 memcmp(dmi_data + 4, "LENOVO", 6) != 0 || 9969 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 || 9970 dmi_data[0x0C] != 0x01) 9971 return; 9972 9973 /* fwstr is the first 8byte string */ 9974 strncpy(ec_fw_string, dmi_data + 0x0F, 8); 9975 } 9976 9977 /* returns 0 - probe ok, or < 0 - probe error. 9978 * Probe ok doesn't mean thinkpad found. 9979 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 9980 static int __must_check __init get_thinkpad_model_data( 9981 struct thinkpad_id_data *tp) 9982 { 9983 const struct dmi_device *dev = NULL; 9984 char ec_fw_string[18] = {0}; 9985 char const *s; 9986 char t; 9987 9988 if (!tp) 9989 return -EINVAL; 9990 9991 memset(tp, 0, sizeof(*tp)); 9992 9993 if (dmi_name_in_vendors("IBM")) 9994 tp->vendor = PCI_VENDOR_ID_IBM; 9995 else if (dmi_name_in_vendors("LENOVO")) 9996 tp->vendor = PCI_VENDOR_ID_LENOVO; 9997 else 9998 return 0; 9999 10000 s = dmi_get_system_info(DMI_BIOS_VERSION); 10001 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 10002 if (s && !tp->bios_version_str) 10003 return -ENOMEM; 10004 10005 /* Really ancient ThinkPad 240X will fail this, which is fine */ 10006 t = tpacpi_parse_fw_id(tp->bios_version_str, 10007 &tp->bios_model, &tp->bios_release); 10008 if (t != 'E' && t != 'C') 10009 return 0; 10010 10011 /* 10012 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 10013 * X32 or newer, all Z series; Some models must have an 10014 * up-to-date BIOS or they will not be detected. 10015 * 10016 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10017 */ 10018 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 10019 if (sscanf(dev->name, 10020 "IBM ThinkPad Embedded Controller -[%17c", 10021 ec_fw_string) == 1) { 10022 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 10023 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 10024 break; 10025 } 10026 } 10027 10028 /* Newer ThinkPads have different EC program info table */ 10029 if (!ec_fw_string[0]) 10030 dmi_walk(find_new_ec_fwstr, &ec_fw_string); 10031 10032 if (ec_fw_string[0]) { 10033 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 10034 if (!tp->ec_version_str) 10035 return -ENOMEM; 10036 10037 t = tpacpi_parse_fw_id(ec_fw_string, 10038 &tp->ec_model, &tp->ec_release); 10039 if (t != 'H') { 10040 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n", 10041 ec_fw_string); 10042 pr_notice("please report this to %s\n", TPACPI_MAIL); 10043 } 10044 } 10045 10046 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 10047 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 10048 tp->model_str = kstrdup(s, GFP_KERNEL); 10049 if (!tp->model_str) 10050 return -ENOMEM; 10051 } else { 10052 s = dmi_get_system_info(DMI_BIOS_VENDOR); 10053 if (s && !(strncasecmp(s, "Lenovo", 6))) { 10054 tp->model_str = kstrdup(s, GFP_KERNEL); 10055 if (!tp->model_str) 10056 return -ENOMEM; 10057 } 10058 } 10059 10060 s = dmi_get_system_info(DMI_PRODUCT_NAME); 10061 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 10062 if (s && !tp->nummodel_str) 10063 return -ENOMEM; 10064 10065 return 0; 10066 } 10067 10068 static int __init probe_for_thinkpad(void) 10069 { 10070 int is_thinkpad; 10071 10072 if (acpi_disabled) 10073 return -ENODEV; 10074 10075 /* It would be dangerous to run the driver in this case */ 10076 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 10077 return -ENODEV; 10078 10079 /* 10080 * Non-ancient models have better DMI tagging, but very old models 10081 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 10082 */ 10083 is_thinkpad = (thinkpad_id.model_str != NULL) || 10084 (thinkpad_id.ec_model != 0) || 10085 tpacpi_is_fw_known(); 10086 10087 /* The EC handler is required */ 10088 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 10089 if (!ec_handle) { 10090 if (is_thinkpad) 10091 pr_err("Not yet supported ThinkPad detected!\n"); 10092 return -ENODEV; 10093 } 10094 10095 if (!is_thinkpad && !force_load) 10096 return -ENODEV; 10097 10098 return 0; 10099 } 10100 10101 static void __init thinkpad_acpi_init_banner(void) 10102 { 10103 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 10104 pr_info("%s\n", TPACPI_URL); 10105 10106 pr_info("ThinkPad BIOS %s, EC %s\n", 10107 (thinkpad_id.bios_version_str) ? 10108 thinkpad_id.bios_version_str : "unknown", 10109 (thinkpad_id.ec_version_str) ? 10110 thinkpad_id.ec_version_str : "unknown"); 10111 10112 BUG_ON(!thinkpad_id.vendor); 10113 10114 if (thinkpad_id.model_str) 10115 pr_info("%s %s, model %s\n", 10116 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 10117 "IBM" : ((thinkpad_id.vendor == 10118 PCI_VENDOR_ID_LENOVO) ? 10119 "Lenovo" : "Unknown vendor"), 10120 thinkpad_id.model_str, 10121 (thinkpad_id.nummodel_str) ? 10122 thinkpad_id.nummodel_str : "unknown"); 10123 } 10124 10125 /* Module init, exit, parameters */ 10126 10127 static struct ibm_init_struct ibms_init[] __initdata = { 10128 { 10129 .data = &thinkpad_acpi_driver_data, 10130 }, 10131 { 10132 .init = hotkey_init, 10133 .data = &hotkey_driver_data, 10134 }, 10135 { 10136 .init = bluetooth_init, 10137 .data = &bluetooth_driver_data, 10138 }, 10139 { 10140 .init = wan_init, 10141 .data = &wan_driver_data, 10142 }, 10143 { 10144 .init = uwb_init, 10145 .data = &uwb_driver_data, 10146 }, 10147 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 10148 { 10149 .init = video_init, 10150 .base_procfs_mode = S_IRUSR, 10151 .data = &video_driver_data, 10152 }, 10153 #endif 10154 { 10155 .init = kbdlight_init, 10156 .data = &kbdlight_driver_data, 10157 }, 10158 { 10159 .init = light_init, 10160 .data = &light_driver_data, 10161 }, 10162 { 10163 .init = cmos_init, 10164 .data = &cmos_driver_data, 10165 }, 10166 { 10167 .init = led_init, 10168 .data = &led_driver_data, 10169 }, 10170 { 10171 .init = beep_init, 10172 .data = &beep_driver_data, 10173 }, 10174 { 10175 .init = thermal_init, 10176 .data = &thermal_driver_data, 10177 }, 10178 { 10179 .init = brightness_init, 10180 .data = &brightness_driver_data, 10181 }, 10182 { 10183 .init = volume_init, 10184 .data = &volume_driver_data, 10185 }, 10186 { 10187 .init = fan_init, 10188 .data = &fan_driver_data, 10189 }, 10190 { 10191 .init = mute_led_init, 10192 .data = &mute_led_driver_data, 10193 }, 10194 { 10195 .init = tpacpi_battery_init, 10196 .data = &battery_driver_data, 10197 }, 10198 }; 10199 10200 static int __init set_ibm_param(const char *val, const struct kernel_param *kp) 10201 { 10202 unsigned int i; 10203 struct ibm_struct *ibm; 10204 10205 if (!kp || !kp->name || !val) 10206 return -EINVAL; 10207 10208 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10209 ibm = ibms_init[i].data; 10210 WARN_ON(ibm == NULL); 10211 10212 if (!ibm || !ibm->name) 10213 continue; 10214 10215 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 10216 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 10217 return -ENOSPC; 10218 strcpy(ibms_init[i].param, val); 10219 strcat(ibms_init[i].param, ","); 10220 return 0; 10221 } 10222 } 10223 10224 return -EINVAL; 10225 } 10226 10227 module_param(experimental, int, 0444); 10228 MODULE_PARM_DESC(experimental, 10229 "Enables experimental features when non-zero"); 10230 10231 module_param_named(debug, dbg_level, uint, 0); 10232 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 10233 10234 module_param(force_load, bool, 0444); 10235 MODULE_PARM_DESC(force_load, 10236 "Attempts to load the driver even on a mis-identified ThinkPad when true"); 10237 10238 module_param_named(fan_control, fan_control_allowed, bool, 0444); 10239 MODULE_PARM_DESC(fan_control, 10240 "Enables setting fan parameters features when true"); 10241 10242 module_param_named(brightness_mode, brightness_mode, uint, 0444); 10243 MODULE_PARM_DESC(brightness_mode, 10244 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 10245 10246 module_param(brightness_enable, uint, 0444); 10247 MODULE_PARM_DESC(brightness_enable, 10248 "Enables backlight control when 1, disables when 0"); 10249 10250 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 10251 module_param_named(volume_mode, volume_mode, uint, 0444); 10252 MODULE_PARM_DESC(volume_mode, 10253 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 10254 10255 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 10256 MODULE_PARM_DESC(volume_capabilities, 10257 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only"); 10258 10259 module_param_named(volume_control, volume_control_allowed, bool, 0444); 10260 MODULE_PARM_DESC(volume_control, 10261 "Enables software override for the console audio control when true"); 10262 10263 module_param_named(software_mute, software_mute_requested, bool, 0444); 10264 MODULE_PARM_DESC(software_mute, 10265 "Request full software mute control"); 10266 10267 /* ALSA module API parameters */ 10268 module_param_named(index, alsa_index, int, 0444); 10269 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 10270 module_param_named(id, alsa_id, charp, 0444); 10271 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 10272 module_param_named(enable, alsa_enable, bool, 0444); 10273 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 10274 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 10275 10276 /* The module parameter can't be read back, that's why 0 is used here */ 10277 #define TPACPI_PARAM(feature) \ 10278 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 10279 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation") 10280 10281 TPACPI_PARAM(hotkey); 10282 TPACPI_PARAM(bluetooth); 10283 TPACPI_PARAM(video); 10284 TPACPI_PARAM(light); 10285 TPACPI_PARAM(cmos); 10286 TPACPI_PARAM(led); 10287 TPACPI_PARAM(beep); 10288 TPACPI_PARAM(brightness); 10289 TPACPI_PARAM(volume); 10290 TPACPI_PARAM(fan); 10291 10292 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10293 module_param(dbg_wlswemul, uint, 0444); 10294 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 10295 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 10296 MODULE_PARM_DESC(wlsw_state, 10297 "Initial state of the emulated WLSW switch"); 10298 10299 module_param(dbg_bluetoothemul, uint, 0444); 10300 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 10301 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 10302 MODULE_PARM_DESC(bluetooth_state, 10303 "Initial state of the emulated bluetooth switch"); 10304 10305 module_param(dbg_wwanemul, uint, 0444); 10306 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 10307 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 10308 MODULE_PARM_DESC(wwan_state, 10309 "Initial state of the emulated WWAN switch"); 10310 10311 module_param(dbg_uwbemul, uint, 0444); 10312 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 10313 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 10314 MODULE_PARM_DESC(uwb_state, 10315 "Initial state of the emulated UWB switch"); 10316 #endif 10317 10318 static void thinkpad_acpi_module_exit(void) 10319 { 10320 struct ibm_struct *ibm, *itmp; 10321 10322 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 10323 10324 list_for_each_entry_safe_reverse(ibm, itmp, 10325 &tpacpi_all_drivers, 10326 all_drivers) { 10327 ibm_exit(ibm); 10328 } 10329 10330 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 10331 10332 if (tpacpi_inputdev) { 10333 if (tp_features.input_device_registered) 10334 input_unregister_device(tpacpi_inputdev); 10335 else 10336 input_free_device(tpacpi_inputdev); 10337 kfree(hotkey_keycode_map); 10338 } 10339 10340 if (tpacpi_hwmon) 10341 hwmon_device_unregister(tpacpi_hwmon); 10342 10343 if (tpacpi_sensors_pdev) 10344 platform_device_unregister(tpacpi_sensors_pdev); 10345 if (tpacpi_pdev) 10346 platform_device_unregister(tpacpi_pdev); 10347 10348 if (tp_features.sensors_pdrv_attrs_registered) 10349 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 10350 if (tp_features.platform_drv_attrs_registered) 10351 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 10352 10353 if (tp_features.sensors_pdrv_registered) 10354 platform_driver_unregister(&tpacpi_hwmon_pdriver); 10355 10356 if (tp_features.platform_drv_registered) 10357 platform_driver_unregister(&tpacpi_pdriver); 10358 10359 if (proc_dir) 10360 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 10361 10362 if (tpacpi_wq) 10363 destroy_workqueue(tpacpi_wq); 10364 10365 kfree(thinkpad_id.bios_version_str); 10366 kfree(thinkpad_id.ec_version_str); 10367 kfree(thinkpad_id.model_str); 10368 kfree(thinkpad_id.nummodel_str); 10369 } 10370 10371 10372 static int __init thinkpad_acpi_module_init(void) 10373 { 10374 int ret, i; 10375 10376 tpacpi_lifecycle = TPACPI_LIFE_INIT; 10377 10378 /* Driver-level probe */ 10379 10380 ret = get_thinkpad_model_data(&thinkpad_id); 10381 if (ret) { 10382 pr_err("unable to get DMI data: %d\n", ret); 10383 thinkpad_acpi_module_exit(); 10384 return ret; 10385 } 10386 ret = probe_for_thinkpad(); 10387 if (ret) { 10388 thinkpad_acpi_module_exit(); 10389 return ret; 10390 } 10391 10392 /* Driver initialization */ 10393 10394 thinkpad_acpi_init_banner(); 10395 tpacpi_check_outdated_fw(); 10396 10397 TPACPI_ACPIHANDLE_INIT(ecrd); 10398 TPACPI_ACPIHANDLE_INIT(ecwr); 10399 10400 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 10401 if (!tpacpi_wq) { 10402 thinkpad_acpi_module_exit(); 10403 return -ENOMEM; 10404 } 10405 10406 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 10407 if (!proc_dir) { 10408 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 10409 thinkpad_acpi_module_exit(); 10410 return -ENODEV; 10411 } 10412 10413 ret = platform_driver_register(&tpacpi_pdriver); 10414 if (ret) { 10415 pr_err("unable to register main platform driver\n"); 10416 thinkpad_acpi_module_exit(); 10417 return ret; 10418 } 10419 tp_features.platform_drv_registered = 1; 10420 10421 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 10422 if (ret) { 10423 pr_err("unable to register hwmon platform driver\n"); 10424 thinkpad_acpi_module_exit(); 10425 return ret; 10426 } 10427 tp_features.sensors_pdrv_registered = 1; 10428 10429 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 10430 if (!ret) { 10431 tp_features.platform_drv_attrs_registered = 1; 10432 ret = tpacpi_create_driver_attributes( 10433 &tpacpi_hwmon_pdriver.driver); 10434 } 10435 if (ret) { 10436 pr_err("unable to create sysfs driver attributes\n"); 10437 thinkpad_acpi_module_exit(); 10438 return ret; 10439 } 10440 tp_features.sensors_pdrv_attrs_registered = 1; 10441 10442 10443 /* Device initialization */ 10444 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 10445 NULL, 0); 10446 if (IS_ERR(tpacpi_pdev)) { 10447 ret = PTR_ERR(tpacpi_pdev); 10448 tpacpi_pdev = NULL; 10449 pr_err("unable to register platform device\n"); 10450 thinkpad_acpi_module_exit(); 10451 return ret; 10452 } 10453 tpacpi_sensors_pdev = platform_device_register_simple( 10454 TPACPI_HWMON_DRVR_NAME, 10455 -1, NULL, 0); 10456 if (IS_ERR(tpacpi_sensors_pdev)) { 10457 ret = PTR_ERR(tpacpi_sensors_pdev); 10458 tpacpi_sensors_pdev = NULL; 10459 pr_err("unable to register hwmon platform device\n"); 10460 thinkpad_acpi_module_exit(); 10461 return ret; 10462 } 10463 tp_features.sensors_pdev_attrs_registered = 1; 10464 tpacpi_hwmon = hwmon_device_register_with_groups( 10465 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL); 10466 10467 if (IS_ERR(tpacpi_hwmon)) { 10468 ret = PTR_ERR(tpacpi_hwmon); 10469 tpacpi_hwmon = NULL; 10470 pr_err("unable to register hwmon device\n"); 10471 thinkpad_acpi_module_exit(); 10472 return ret; 10473 } 10474 mutex_init(&tpacpi_inputdev_send_mutex); 10475 tpacpi_inputdev = input_allocate_device(); 10476 if (!tpacpi_inputdev) { 10477 thinkpad_acpi_module_exit(); 10478 return -ENOMEM; 10479 } else { 10480 /* Prepare input device, but don't register */ 10481 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 10482 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 10483 tpacpi_inputdev->id.bustype = BUS_HOST; 10484 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 10485 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 10486 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 10487 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 10488 } 10489 10490 /* Init subdriver dependencies */ 10491 tpacpi_detect_brightness_capabilities(); 10492 10493 /* Init subdrivers */ 10494 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10495 ret = ibm_init(&ibms_init[i]); 10496 if (ret >= 0 && *ibms_init[i].param) 10497 ret = ibms_init[i].data->write(ibms_init[i].param); 10498 if (ret < 0) { 10499 thinkpad_acpi_module_exit(); 10500 return ret; 10501 } 10502 } 10503 10504 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 10505 10506 ret = input_register_device(tpacpi_inputdev); 10507 if (ret < 0) { 10508 pr_err("unable to register input device\n"); 10509 thinkpad_acpi_module_exit(); 10510 return ret; 10511 } else { 10512 tp_features.input_device_registered = 1; 10513 } 10514 10515 return 0; 10516 } 10517 10518 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 10519 10520 /* 10521 * This will autoload the driver in almost every ThinkPad 10522 * in widespread use. 10523 * 10524 * Only _VERY_ old models, like the 240, 240x and 570 lack 10525 * the HKEY event interface. 10526 */ 10527 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 10528 10529 /* 10530 * DMI matching for module autoloading 10531 * 10532 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10533 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 10534 * 10535 * Only models listed in thinkwiki will be supported, so add yours 10536 * if it is not there yet. 10537 */ 10538 #define IBM_BIOS_MODULE_ALIAS(__type) \ 10539 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 10540 10541 /* Ancient thinkpad BIOSes have to be identified by 10542 * BIOS type or model number, and there are far less 10543 * BIOS types than model numbers... */ 10544 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 10545 10546 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 10547 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 10548 MODULE_DESCRIPTION(TPACPI_DESC); 10549 MODULE_VERSION(TPACPI_VERSION); 10550 MODULE_LICENSE("GPL"); 10551 10552 module_init(thinkpad_acpi_module_init); 10553 module_exit(thinkpad_acpi_module_exit); 10554