1 /* 2 * thinkpad_acpi.c - ThinkPad ACPI Extras 3 * 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 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #define TPACPI_VERSION "0.25" 27 #define TPACPI_SYSFS_VERSION 0x020700 28 29 /* 30 * Changelog: 31 * 2007-10-20 changelog trimmed down 32 * 33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 34 * drivers/misc. 35 * 36 * 2006-11-22 0.13 new maintainer 37 * changelog now lives in git commit history, and will 38 * not be updated further in-file. 39 * 40 * 2005-03-17 0.11 support for 600e, 770x 41 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 42 * 43 * 2005-01-16 0.9 use MODULE_VERSION 44 * thanks to Henrik Brix Andersen <brix@gentoo.org> 45 * fix parameter passing on module loading 46 * thanks to Rusty Russell <rusty@rustcorp.com.au> 47 * thanks to Jim Radford <radford@blackbean.org> 48 * 2004-11-08 0.8 fix init error case, don't return from a macro 49 * thanks to Chris Wright <chrisw@osdl.org> 50 */ 51 52 #include <linux/kernel.h> 53 #include <linux/module.h> 54 #include <linux/init.h> 55 #include <linux/types.h> 56 #include <linux/string.h> 57 #include <linux/list.h> 58 #include <linux/mutex.h> 59 #include <linux/sched.h> 60 #include <linux/kthread.h> 61 #include <linux/freezer.h> 62 #include <linux/delay.h> 63 #include <linux/slab.h> 64 #include <linux/nvram.h> 65 #include <linux/proc_fs.h> 66 #include <linux/seq_file.h> 67 #include <linux/sysfs.h> 68 #include <linux/backlight.h> 69 #include <linux/fb.h> 70 #include <linux/platform_device.h> 71 #include <linux/hwmon.h> 72 #include <linux/hwmon-sysfs.h> 73 #include <linux/input.h> 74 #include <linux/leds.h> 75 #include <linux/rfkill.h> 76 #include <linux/dmi.h> 77 #include <linux/jiffies.h> 78 #include <linux/workqueue.h> 79 #include <linux/acpi.h> 80 #include <linux/pci_ids.h> 81 #include <linux/thinkpad_acpi.h> 82 #include <sound/core.h> 83 #include <sound/control.h> 84 #include <sound/initval.h> 85 #include <asm/uaccess.h> 86 87 /* ThinkPad CMOS commands */ 88 #define TP_CMOS_VOLUME_DOWN 0 89 #define TP_CMOS_VOLUME_UP 1 90 #define TP_CMOS_VOLUME_MUTE 2 91 #define TP_CMOS_BRIGHTNESS_UP 4 92 #define TP_CMOS_BRIGHTNESS_DOWN 5 93 #define TP_CMOS_THINKLIGHT_ON 12 94 #define TP_CMOS_THINKLIGHT_OFF 13 95 96 /* NVRAM Addresses */ 97 enum tp_nvram_addr { 98 TP_NVRAM_ADDR_HK2 = 0x57, 99 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 100 TP_NVRAM_ADDR_VIDEO = 0x59, 101 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 102 TP_NVRAM_ADDR_MIXER = 0x60, 103 }; 104 105 /* NVRAM bit masks */ 106 enum { 107 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 108 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 109 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 110 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 111 TP_NVRAM_MASK_THINKLIGHT = 0x10, 112 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 113 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 114 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 115 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 116 TP_NVRAM_MASK_MUTE = 0x40, 117 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 118 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 119 TP_NVRAM_POS_LEVEL_VOLUME = 0, 120 }; 121 122 /* Misc NVRAM-related */ 123 enum { 124 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 125 }; 126 127 /* ACPI HIDs */ 128 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 129 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 130 #define TPACPI_ACPI_EC_HID "PNP0C09" 131 132 /* Input IDs */ 133 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 134 #define TPACPI_HKEY_INPUT_VERSION 0x4101 135 136 /* ACPI \WGSV commands */ 137 enum { 138 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 139 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 140 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 141 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 142 }; 143 144 /* TP_ACPI_WGSV_GET_STATE bits */ 145 enum { 146 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 147 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 148 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 149 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 150 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 151 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 152 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 153 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 154 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 155 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 156 }; 157 158 /* HKEY events */ 159 enum tpacpi_hkey_event_t { 160 /* Hotkey-related */ 161 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 162 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 163 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 164 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 165 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 166 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 167 168 /* Reasons for waking up from S3/S4 */ 169 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 170 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 171 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 172 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 173 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 174 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 175 176 /* Auto-sleep after eject request */ 177 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 178 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 179 180 /* Misc bay events */ 181 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 182 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 183 or port replicator */ 184 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 185 dock or port replicator */ 186 187 /* User-interface events */ 188 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 189 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 190 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 191 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 192 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 193 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 194 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 195 196 /* Key-related user-interface events */ 197 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 198 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 199 200 /* Thermal events */ 201 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 202 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 203 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 204 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 205 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 206 207 /* AC-related events */ 208 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 209 210 /* Misc */ 211 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 212 }; 213 214 /**************************************************************************** 215 * Main driver 216 */ 217 218 #define TPACPI_NAME "thinkpad" 219 #define TPACPI_DESC "ThinkPad ACPI Extras" 220 #define TPACPI_FILE TPACPI_NAME "_acpi" 221 #define TPACPI_URL "http://ibm-acpi.sf.net/" 222 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 223 224 #define TPACPI_PROC_DIR "ibm" 225 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 226 #define TPACPI_DRVR_NAME TPACPI_FILE 227 #define TPACPI_DRVR_SHORTNAME "tpacpi" 228 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 229 230 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 231 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 232 233 #define TPACPI_MAX_ACPI_ARGS 3 234 235 /* Debugging printk groups */ 236 #define TPACPI_DBG_ALL 0xffff 237 #define TPACPI_DBG_DISCLOSETASK 0x8000 238 #define TPACPI_DBG_INIT 0x0001 239 #define TPACPI_DBG_EXIT 0x0002 240 #define TPACPI_DBG_RFKILL 0x0004 241 #define TPACPI_DBG_HKEY 0x0008 242 #define TPACPI_DBG_FAN 0x0010 243 #define TPACPI_DBG_BRGHT 0x0020 244 #define TPACPI_DBG_MIXER 0x0040 245 246 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 247 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 248 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 249 250 251 /**************************************************************************** 252 * Driver-wide structs and misc. variables 253 */ 254 255 struct ibm_struct; 256 257 struct tp_acpi_drv_struct { 258 const struct acpi_device_id *hid; 259 struct acpi_driver *driver; 260 261 void (*notify) (struct ibm_struct *, u32); 262 acpi_handle *handle; 263 u32 type; 264 struct acpi_device *device; 265 }; 266 267 struct ibm_struct { 268 char *name; 269 270 int (*read) (struct seq_file *); 271 int (*write) (char *); 272 void (*exit) (void); 273 void (*resume) (void); 274 void (*suspend) (void); 275 void (*shutdown) (void); 276 277 struct list_head all_drivers; 278 279 struct tp_acpi_drv_struct *acpi; 280 281 struct { 282 u8 acpi_driver_registered:1; 283 u8 acpi_notify_installed:1; 284 u8 proc_created:1; 285 u8 init_called:1; 286 u8 experimental:1; 287 } flags; 288 }; 289 290 struct ibm_init_struct { 291 char param[32]; 292 293 int (*init) (struct ibm_init_struct *); 294 umode_t base_procfs_mode; 295 struct ibm_struct *data; 296 }; 297 298 static struct { 299 u32 bluetooth:1; 300 u32 hotkey:1; 301 u32 hotkey_mask:1; 302 u32 hotkey_wlsw:1; 303 u32 hotkey_tablet:1; 304 u32 light:1; 305 u32 light_status:1; 306 u32 bright_acpimode:1; 307 u32 bright_unkfw:1; 308 u32 wan:1; 309 u32 uwb:1; 310 u32 fan_ctrl_status_undef:1; 311 u32 second_fan:1; 312 u32 beep_needs_two_args:1; 313 u32 mixer_no_level_control:1; 314 u32 input_device_registered:1; 315 u32 platform_drv_registered:1; 316 u32 platform_drv_attrs_registered:1; 317 u32 sensors_pdrv_registered:1; 318 u32 sensors_pdrv_attrs_registered:1; 319 u32 sensors_pdev_attrs_registered:1; 320 u32 hotkey_poll_active:1; 321 } tp_features; 322 323 static struct { 324 u16 hotkey_mask_ff:1; 325 u16 volume_ctrl_forbidden:1; 326 } tp_warned; 327 328 struct thinkpad_id_data { 329 unsigned int vendor; /* ThinkPad vendor: 330 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 331 332 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 333 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 334 335 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 336 u16 ec_model; 337 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 338 u16 ec_release; 339 340 char *model_str; /* ThinkPad T43 */ 341 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 342 }; 343 static struct thinkpad_id_data thinkpad_id; 344 345 static enum { 346 TPACPI_LIFE_INIT = 0, 347 TPACPI_LIFE_RUNNING, 348 TPACPI_LIFE_EXITING, 349 } tpacpi_lifecycle; 350 351 static int experimental; 352 static u32 dbg_level; 353 354 static struct workqueue_struct *tpacpi_wq; 355 356 enum led_status_t { 357 TPACPI_LED_OFF = 0, 358 TPACPI_LED_ON, 359 TPACPI_LED_BLINK, 360 }; 361 362 /* Special LED class that can defer work */ 363 struct tpacpi_led_classdev { 364 struct led_classdev led_classdev; 365 struct work_struct work; 366 enum led_status_t new_state; 367 int led; 368 }; 369 370 /* brightness level capabilities */ 371 static unsigned int bright_maxlvl; /* 0 = unknown */ 372 373 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 374 static int dbg_wlswemul; 375 static bool tpacpi_wlsw_emulstate; 376 static int dbg_bluetoothemul; 377 static bool tpacpi_bluetooth_emulstate; 378 static int dbg_wwanemul; 379 static bool tpacpi_wwan_emulstate; 380 static int dbg_uwbemul; 381 static bool tpacpi_uwb_emulstate; 382 #endif 383 384 385 /************************************************************************* 386 * Debugging helpers 387 */ 388 389 #define dbg_printk(a_dbg_level, format, arg...) \ 390 do { \ 391 if (dbg_level & (a_dbg_level)) \ 392 printk(KERN_DEBUG pr_fmt("%s: " format), \ 393 __func__, ##arg); \ 394 } while (0) 395 396 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 397 #define vdbg_printk dbg_printk 398 static const char *str_supported(int is_supported); 399 #else 400 static inline const char *str_supported(int is_supported) { return ""; } 401 #define vdbg_printk(a_dbg_level, format, arg...) \ 402 no_printk(format, ##arg) 403 #endif 404 405 static void tpacpi_log_usertask(const char * const what) 406 { 407 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 408 what, task_tgid_vnr(current)); 409 } 410 411 #define tpacpi_disclose_usertask(what, format, arg...) \ 412 do { \ 413 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 414 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 415 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 416 what, task_tgid_vnr(current), ## arg); \ 417 } \ 418 } while (0) 419 420 /* 421 * Quirk handling helpers 422 * 423 * ThinkPad IDs and versions seen in the field so far 424 * are two-characters from the set [0-9A-Z], i.e. base 36. 425 * 426 * We use values well outside that range as specials. 427 */ 428 429 #define TPACPI_MATCH_ANY 0xffffU 430 #define TPACPI_MATCH_UNKNOWN 0U 431 432 /* TPID('1', 'Y') == 0x5931 */ 433 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 434 435 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 436 { .vendor = PCI_VENDOR_ID_IBM, \ 437 .bios = TPID(__id1, __id2), \ 438 .ec = TPACPI_MATCH_ANY, \ 439 .quirks = (__quirk) } 440 441 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 442 { .vendor = PCI_VENDOR_ID_LENOVO, \ 443 .bios = TPID(__id1, __id2), \ 444 .ec = TPACPI_MATCH_ANY, \ 445 .quirks = (__quirk) } 446 447 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 448 { .vendor = PCI_VENDOR_ID_LENOVO, \ 449 .bios = TPACPI_MATCH_ANY, \ 450 .ec = TPID(__id1, __id2), \ 451 .quirks = (__quirk) } 452 453 struct tpacpi_quirk { 454 unsigned int vendor; 455 u16 bios; 456 u16 ec; 457 unsigned long quirks; 458 }; 459 460 /** 461 * tpacpi_check_quirks() - search BIOS/EC version on a list 462 * @qlist: array of &struct tpacpi_quirk 463 * @qlist_size: number of elements in @qlist 464 * 465 * Iterates over a quirks list until one is found that matches the 466 * ThinkPad's vendor, BIOS and EC model. 467 * 468 * Returns 0 if nothing matches, otherwise returns the quirks field of 469 * the matching &struct tpacpi_quirk entry. 470 * 471 * The match criteria is: vendor, ec and bios much match. 472 */ 473 static unsigned long __init tpacpi_check_quirks( 474 const struct tpacpi_quirk *qlist, 475 unsigned int qlist_size) 476 { 477 while (qlist_size) { 478 if ((qlist->vendor == thinkpad_id.vendor || 479 qlist->vendor == TPACPI_MATCH_ANY) && 480 (qlist->bios == thinkpad_id.bios_model || 481 qlist->bios == TPACPI_MATCH_ANY) && 482 (qlist->ec == thinkpad_id.ec_model || 483 qlist->ec == TPACPI_MATCH_ANY)) 484 return qlist->quirks; 485 486 qlist_size--; 487 qlist++; 488 } 489 return 0; 490 } 491 492 static inline bool __pure __init tpacpi_is_lenovo(void) 493 { 494 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 495 } 496 497 static inline bool __pure __init tpacpi_is_ibm(void) 498 { 499 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 500 } 501 502 /**************************************************************************** 503 **************************************************************************** 504 * 505 * ACPI Helpers and device model 506 * 507 **************************************************************************** 508 ****************************************************************************/ 509 510 /************************************************************************* 511 * ACPI basic handles 512 */ 513 514 static acpi_handle root_handle; 515 static acpi_handle ec_handle; 516 517 #define TPACPI_HANDLE(object, parent, paths...) \ 518 static acpi_handle object##_handle; \ 519 static const acpi_handle * const object##_parent __initconst = \ 520 &parent##_handle; \ 521 static char *object##_paths[] __initdata = { paths } 522 523 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 524 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 525 526 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 527 /* T4x, X31, X40 */ 528 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 529 "\\CMS", /* R40, R40e */ 530 ); /* all others */ 531 532 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 533 "^HKEY", /* R30, R31 */ 534 "HKEY", /* all others */ 535 ); /* 570 */ 536 537 /************************************************************************* 538 * ACPI helpers 539 */ 540 541 static int acpi_evalf(acpi_handle handle, 542 int *res, char *method, char *fmt, ...) 543 { 544 char *fmt0 = fmt; 545 struct acpi_object_list params; 546 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 547 struct acpi_buffer result, *resultp; 548 union acpi_object out_obj; 549 acpi_status status; 550 va_list ap; 551 char res_type; 552 int success; 553 int quiet; 554 555 if (!*fmt) { 556 pr_err("acpi_evalf() called with empty format\n"); 557 return 0; 558 } 559 560 if (*fmt == 'q') { 561 quiet = 1; 562 fmt++; 563 } else 564 quiet = 0; 565 566 res_type = *(fmt++); 567 568 params.count = 0; 569 params.pointer = &in_objs[0]; 570 571 va_start(ap, fmt); 572 while (*fmt) { 573 char c = *(fmt++); 574 switch (c) { 575 case 'd': /* int */ 576 in_objs[params.count].integer.value = va_arg(ap, int); 577 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 578 break; 579 /* add more types as needed */ 580 default: 581 pr_err("acpi_evalf() called " 582 "with invalid format character '%c'\n", c); 583 va_end(ap); 584 return 0; 585 } 586 } 587 va_end(ap); 588 589 if (res_type != 'v') { 590 result.length = sizeof(out_obj); 591 result.pointer = &out_obj; 592 resultp = &result; 593 } else 594 resultp = NULL; 595 596 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 597 598 switch (res_type) { 599 case 'd': /* int */ 600 success = (status == AE_OK && 601 out_obj.type == ACPI_TYPE_INTEGER); 602 if (success && res) 603 *res = out_obj.integer.value; 604 break; 605 case 'v': /* void */ 606 success = status == AE_OK; 607 break; 608 /* add more types as needed */ 609 default: 610 pr_err("acpi_evalf() called " 611 "with invalid format character '%c'\n", res_type); 612 return 0; 613 } 614 615 if (!success && !quiet) 616 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 617 method, fmt0, acpi_format_exception(status)); 618 619 return success; 620 } 621 622 static int acpi_ec_read(int i, u8 *p) 623 { 624 int v; 625 626 if (ecrd_handle) { 627 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 628 return 0; 629 *p = v; 630 } else { 631 if (ec_read(i, p) < 0) 632 return 0; 633 } 634 635 return 1; 636 } 637 638 static int acpi_ec_write(int i, u8 v) 639 { 640 if (ecwr_handle) { 641 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 642 return 0; 643 } else { 644 if (ec_write(i, v) < 0) 645 return 0; 646 } 647 648 return 1; 649 } 650 651 static int issue_thinkpad_cmos_command(int cmos_cmd) 652 { 653 if (!cmos_handle) 654 return -ENXIO; 655 656 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 657 return -EIO; 658 659 return 0; 660 } 661 662 /************************************************************************* 663 * ACPI device model 664 */ 665 666 #define TPACPI_ACPIHANDLE_INIT(object) \ 667 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 668 object##_paths, ARRAY_SIZE(object##_paths)) 669 670 static void __init drv_acpi_handle_init(const char *name, 671 acpi_handle *handle, const acpi_handle parent, 672 char **paths, const int num_paths) 673 { 674 int i; 675 acpi_status status; 676 677 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 678 name); 679 680 for (i = 0; i < num_paths; i++) { 681 status = acpi_get_handle(parent, paths[i], handle); 682 if (ACPI_SUCCESS(status)) { 683 dbg_printk(TPACPI_DBG_INIT, 684 "Found ACPI handle %s for %s\n", 685 paths[i], name); 686 return; 687 } 688 } 689 690 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 691 name); 692 *handle = NULL; 693 } 694 695 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 696 u32 level, void *context, void **return_value) 697 { 698 struct acpi_device *dev; 699 if (!strcmp(context, "video")) { 700 if (acpi_bus_get_device(handle, &dev)) 701 return AE_OK; 702 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 703 return AE_OK; 704 } 705 706 *(acpi_handle *)return_value = handle; 707 708 return AE_CTRL_TERMINATE; 709 } 710 711 static void __init tpacpi_acpi_handle_locate(const char *name, 712 const char *hid, 713 acpi_handle *handle) 714 { 715 acpi_status status; 716 acpi_handle device_found; 717 718 BUG_ON(!name || !handle); 719 vdbg_printk(TPACPI_DBG_INIT, 720 "trying to locate ACPI handle for %s, using HID %s\n", 721 name, hid ? hid : "NULL"); 722 723 memset(&device_found, 0, sizeof(device_found)); 724 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 725 (void *)name, &device_found); 726 727 *handle = NULL; 728 729 if (ACPI_SUCCESS(status)) { 730 *handle = device_found; 731 dbg_printk(TPACPI_DBG_INIT, 732 "Found ACPI handle for %s\n", name); 733 } else { 734 vdbg_printk(TPACPI_DBG_INIT, 735 "Could not locate an ACPI handle for %s: %s\n", 736 name, acpi_format_exception(status)); 737 } 738 } 739 740 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 741 { 742 struct ibm_struct *ibm = data; 743 744 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 745 return; 746 747 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 748 return; 749 750 ibm->acpi->notify(ibm, event); 751 } 752 753 static int __init setup_acpi_notify(struct ibm_struct *ibm) 754 { 755 acpi_status status; 756 int rc; 757 758 BUG_ON(!ibm->acpi); 759 760 if (!*ibm->acpi->handle) 761 return 0; 762 763 vdbg_printk(TPACPI_DBG_INIT, 764 "setting up ACPI notify for %s\n", ibm->name); 765 766 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 767 if (rc < 0) { 768 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 769 return -ENODEV; 770 } 771 772 ibm->acpi->device->driver_data = ibm; 773 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 774 TPACPI_ACPI_EVENT_PREFIX, 775 ibm->name); 776 777 status = acpi_install_notify_handler(*ibm->acpi->handle, 778 ibm->acpi->type, dispatch_acpi_notify, ibm); 779 if (ACPI_FAILURE(status)) { 780 if (status == AE_ALREADY_EXISTS) { 781 pr_notice("another device driver is already " 782 "handling %s events\n", ibm->name); 783 } else { 784 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 785 ibm->name, acpi_format_exception(status)); 786 } 787 return -ENODEV; 788 } 789 ibm->flags.acpi_notify_installed = 1; 790 return 0; 791 } 792 793 static int __init tpacpi_device_add(struct acpi_device *device) 794 { 795 return 0; 796 } 797 798 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 799 { 800 int rc; 801 802 dbg_printk(TPACPI_DBG_INIT, 803 "registering %s as an ACPI driver\n", ibm->name); 804 805 BUG_ON(!ibm->acpi); 806 807 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 808 if (!ibm->acpi->driver) { 809 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 810 return -ENOMEM; 811 } 812 813 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 814 ibm->acpi->driver->ids = ibm->acpi->hid; 815 816 ibm->acpi->driver->ops.add = &tpacpi_device_add; 817 818 rc = acpi_bus_register_driver(ibm->acpi->driver); 819 if (rc < 0) { 820 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 821 ibm->name, rc); 822 kfree(ibm->acpi->driver); 823 ibm->acpi->driver = NULL; 824 } else if (!rc) 825 ibm->flags.acpi_driver_registered = 1; 826 827 return rc; 828 } 829 830 831 /**************************************************************************** 832 **************************************************************************** 833 * 834 * Procfs Helpers 835 * 836 **************************************************************************** 837 ****************************************************************************/ 838 839 static int dispatch_proc_show(struct seq_file *m, void *v) 840 { 841 struct ibm_struct *ibm = m->private; 842 843 if (!ibm || !ibm->read) 844 return -EINVAL; 845 return ibm->read(m); 846 } 847 848 static int dispatch_proc_open(struct inode *inode, struct file *file) 849 { 850 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 851 } 852 853 static ssize_t dispatch_proc_write(struct file *file, 854 const char __user *userbuf, 855 size_t count, loff_t *pos) 856 { 857 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 858 char *kernbuf; 859 int ret; 860 861 if (!ibm || !ibm->write) 862 return -EINVAL; 863 if (count > PAGE_SIZE - 2) 864 return -EINVAL; 865 866 kernbuf = kmalloc(count + 2, GFP_KERNEL); 867 if (!kernbuf) 868 return -ENOMEM; 869 870 if (copy_from_user(kernbuf, userbuf, count)) { 871 kfree(kernbuf); 872 return -EFAULT; 873 } 874 875 kernbuf[count] = 0; 876 strcat(kernbuf, ","); 877 ret = ibm->write(kernbuf); 878 if (ret == 0) 879 ret = count; 880 881 kfree(kernbuf); 882 883 return ret; 884 } 885 886 static const struct file_operations dispatch_proc_fops = { 887 .owner = THIS_MODULE, 888 .open = dispatch_proc_open, 889 .read = seq_read, 890 .llseek = seq_lseek, 891 .release = single_release, 892 .write = dispatch_proc_write, 893 }; 894 895 static char *next_cmd(char **cmds) 896 { 897 char *start = *cmds; 898 char *end; 899 900 while ((end = strchr(start, ',')) && end == start) 901 start = end + 1; 902 903 if (!end) 904 return NULL; 905 906 *end = 0; 907 *cmds = end + 1; 908 return start; 909 } 910 911 912 /**************************************************************************** 913 **************************************************************************** 914 * 915 * Device model: input, hwmon and platform 916 * 917 **************************************************************************** 918 ****************************************************************************/ 919 920 static struct platform_device *tpacpi_pdev; 921 static struct platform_device *tpacpi_sensors_pdev; 922 static struct device *tpacpi_hwmon; 923 static struct input_dev *tpacpi_inputdev; 924 static struct mutex tpacpi_inputdev_send_mutex; 925 static LIST_HEAD(tpacpi_all_drivers); 926 927 #ifdef CONFIG_PM_SLEEP 928 static int tpacpi_suspend_handler(struct device *dev) 929 { 930 struct ibm_struct *ibm, *itmp; 931 932 list_for_each_entry_safe(ibm, itmp, 933 &tpacpi_all_drivers, 934 all_drivers) { 935 if (ibm->suspend) 936 (ibm->suspend)(); 937 } 938 939 return 0; 940 } 941 942 static int tpacpi_resume_handler(struct device *dev) 943 { 944 struct ibm_struct *ibm, *itmp; 945 946 list_for_each_entry_safe(ibm, itmp, 947 &tpacpi_all_drivers, 948 all_drivers) { 949 if (ibm->resume) 950 (ibm->resume)(); 951 } 952 953 return 0; 954 } 955 #endif 956 957 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 958 tpacpi_suspend_handler, tpacpi_resume_handler); 959 960 static void tpacpi_shutdown_handler(struct platform_device *pdev) 961 { 962 struct ibm_struct *ibm, *itmp; 963 964 list_for_each_entry_safe(ibm, itmp, 965 &tpacpi_all_drivers, 966 all_drivers) { 967 if (ibm->shutdown) 968 (ibm->shutdown)(); 969 } 970 } 971 972 static struct platform_driver tpacpi_pdriver = { 973 .driver = { 974 .name = TPACPI_DRVR_NAME, 975 .owner = THIS_MODULE, 976 .pm = &tpacpi_pm, 977 }, 978 .shutdown = tpacpi_shutdown_handler, 979 }; 980 981 static struct platform_driver tpacpi_hwmon_pdriver = { 982 .driver = { 983 .name = TPACPI_HWMON_DRVR_NAME, 984 .owner = THIS_MODULE, 985 }, 986 }; 987 988 /************************************************************************* 989 * sysfs support helpers 990 */ 991 992 struct attribute_set { 993 unsigned int members, max_members; 994 struct attribute_group group; 995 }; 996 997 struct attribute_set_obj { 998 struct attribute_set s; 999 struct attribute *a; 1000 } __attribute__((packed)); 1001 1002 static struct attribute_set *create_attr_set(unsigned int max_members, 1003 const char *name) 1004 { 1005 struct attribute_set_obj *sobj; 1006 1007 if (max_members == 0) 1008 return NULL; 1009 1010 /* Allocates space for implicit NULL at the end too */ 1011 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1012 max_members * sizeof(struct attribute *), 1013 GFP_KERNEL); 1014 if (!sobj) 1015 return NULL; 1016 sobj->s.max_members = max_members; 1017 sobj->s.group.attrs = &sobj->a; 1018 sobj->s.group.name = name; 1019 1020 return &sobj->s; 1021 } 1022 1023 #define destroy_attr_set(_set) \ 1024 kfree(_set); 1025 1026 /* not multi-threaded safe, use it in a single thread per set */ 1027 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1028 { 1029 if (!s || !attr) 1030 return -EINVAL; 1031 1032 if (s->members >= s->max_members) 1033 return -ENOMEM; 1034 1035 s->group.attrs[s->members] = attr; 1036 s->members++; 1037 1038 return 0; 1039 } 1040 1041 static int add_many_to_attr_set(struct attribute_set *s, 1042 struct attribute **attr, 1043 unsigned int count) 1044 { 1045 int i, res; 1046 1047 for (i = 0; i < count; i++) { 1048 res = add_to_attr_set(s, attr[i]); 1049 if (res) 1050 return res; 1051 } 1052 1053 return 0; 1054 } 1055 1056 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1057 { 1058 sysfs_remove_group(kobj, &s->group); 1059 destroy_attr_set(s); 1060 } 1061 1062 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1063 sysfs_create_group(_kobj, &_attr_set->group) 1064 1065 static int parse_strtoul(const char *buf, 1066 unsigned long max, unsigned long *value) 1067 { 1068 char *endp; 1069 1070 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1071 endp = skip_spaces(endp); 1072 if (*endp || *value > max) 1073 return -EINVAL; 1074 1075 return 0; 1076 } 1077 1078 static void tpacpi_disable_brightness_delay(void) 1079 { 1080 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1081 pr_notice("ACPI backlight control delay disabled\n"); 1082 } 1083 1084 static void printk_deprecated_attribute(const char * const what, 1085 const char * const details) 1086 { 1087 tpacpi_log_usertask("deprecated sysfs attribute"); 1088 pr_warn("WARNING: sysfs attribute %s is deprecated and " 1089 "will be removed. %s\n", 1090 what, details); 1091 } 1092 1093 /************************************************************************* 1094 * rfkill and radio control support helpers 1095 */ 1096 1097 /* 1098 * ThinkPad-ACPI firmware handling model: 1099 * 1100 * WLSW (master wireless switch) is event-driven, and is common to all 1101 * firmware-controlled radios. It cannot be controlled, just monitored, 1102 * as expected. It overrides all radio state in firmware 1103 * 1104 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1105 * (TODO: verify how WLSW interacts with the returned radio state). 1106 * 1107 * The only time there are shadow radio state changes, is when 1108 * masked-off hotkeys are used. 1109 */ 1110 1111 /* 1112 * Internal driver API for radio state: 1113 * 1114 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1115 * bool: true means radio blocked (off) 1116 */ 1117 enum tpacpi_rfkill_state { 1118 TPACPI_RFK_RADIO_OFF = 0, 1119 TPACPI_RFK_RADIO_ON 1120 }; 1121 1122 /* rfkill switches */ 1123 enum tpacpi_rfk_id { 1124 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1125 TPACPI_RFK_WWAN_SW_ID, 1126 TPACPI_RFK_UWB_SW_ID, 1127 TPACPI_RFK_SW_MAX 1128 }; 1129 1130 static const char *tpacpi_rfkill_names[] = { 1131 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1132 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1133 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1134 [TPACPI_RFK_SW_MAX] = NULL 1135 }; 1136 1137 /* ThinkPad-ACPI rfkill subdriver */ 1138 struct tpacpi_rfk { 1139 struct rfkill *rfkill; 1140 enum tpacpi_rfk_id id; 1141 const struct tpacpi_rfk_ops *ops; 1142 }; 1143 1144 struct tpacpi_rfk_ops { 1145 /* firmware interface */ 1146 int (*get_status)(void); 1147 int (*set_status)(const enum tpacpi_rfkill_state); 1148 }; 1149 1150 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1151 1152 /* Query FW and update rfkill sw state for a given rfkill switch */ 1153 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1154 { 1155 int status; 1156 1157 if (!tp_rfk) 1158 return -ENODEV; 1159 1160 status = (tp_rfk->ops->get_status)(); 1161 if (status < 0) 1162 return status; 1163 1164 rfkill_set_sw_state(tp_rfk->rfkill, 1165 (status == TPACPI_RFK_RADIO_OFF)); 1166 1167 return status; 1168 } 1169 1170 /* Query FW and update rfkill sw state for all rfkill switches */ 1171 static void tpacpi_rfk_update_swstate_all(void) 1172 { 1173 unsigned int i; 1174 1175 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1176 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1177 } 1178 1179 /* 1180 * Sync the HW-blocking state of all rfkill switches, 1181 * do notice it causes the rfkill core to schedule uevents 1182 */ 1183 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1184 { 1185 unsigned int i; 1186 struct tpacpi_rfk *tp_rfk; 1187 1188 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1189 tp_rfk = tpacpi_rfkill_switches[i]; 1190 if (tp_rfk) { 1191 if (rfkill_set_hw_state(tp_rfk->rfkill, 1192 blocked)) { 1193 /* ignore -- we track sw block */ 1194 } 1195 } 1196 } 1197 } 1198 1199 /* Call to get the WLSW state from the firmware */ 1200 static int hotkey_get_wlsw(void); 1201 1202 /* Call to query WLSW state and update all rfkill switches */ 1203 static bool tpacpi_rfk_check_hwblock_state(void) 1204 { 1205 int res = hotkey_get_wlsw(); 1206 int hw_blocked; 1207 1208 /* When unknown or unsupported, we have to assume it is unblocked */ 1209 if (res < 0) 1210 return false; 1211 1212 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1213 tpacpi_rfk_update_hwblock_state(hw_blocked); 1214 1215 return hw_blocked; 1216 } 1217 1218 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1219 { 1220 struct tpacpi_rfk *tp_rfk = data; 1221 int res; 1222 1223 dbg_printk(TPACPI_DBG_RFKILL, 1224 "request to change radio state to %s\n", 1225 blocked ? "blocked" : "unblocked"); 1226 1227 /* try to set radio state */ 1228 res = (tp_rfk->ops->set_status)(blocked ? 1229 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1230 1231 /* and update the rfkill core with whatever the FW really did */ 1232 tpacpi_rfk_update_swstate(tp_rfk); 1233 1234 return (res < 0) ? res : 0; 1235 } 1236 1237 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1238 .set_block = tpacpi_rfk_hook_set_block, 1239 }; 1240 1241 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1242 const struct tpacpi_rfk_ops *tp_rfkops, 1243 const enum rfkill_type rfktype, 1244 const char *name, 1245 const bool set_default) 1246 { 1247 struct tpacpi_rfk *atp_rfk; 1248 int res; 1249 bool sw_state = false; 1250 bool hw_state; 1251 int sw_status; 1252 1253 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1254 1255 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1256 if (atp_rfk) 1257 atp_rfk->rfkill = rfkill_alloc(name, 1258 &tpacpi_pdev->dev, 1259 rfktype, 1260 &tpacpi_rfk_rfkill_ops, 1261 atp_rfk); 1262 if (!atp_rfk || !atp_rfk->rfkill) { 1263 pr_err("failed to allocate memory for rfkill class\n"); 1264 kfree(atp_rfk); 1265 return -ENOMEM; 1266 } 1267 1268 atp_rfk->id = id; 1269 atp_rfk->ops = tp_rfkops; 1270 1271 sw_status = (tp_rfkops->get_status)(); 1272 if (sw_status < 0) { 1273 pr_err("failed to read initial state for %s, error %d\n", 1274 name, sw_status); 1275 } else { 1276 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1277 if (set_default) { 1278 /* try to keep the initial state, since we ask the 1279 * firmware to preserve it across S5 in NVRAM */ 1280 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1281 } 1282 } 1283 hw_state = tpacpi_rfk_check_hwblock_state(); 1284 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1285 1286 res = rfkill_register(atp_rfk->rfkill); 1287 if (res < 0) { 1288 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1289 rfkill_destroy(atp_rfk->rfkill); 1290 kfree(atp_rfk); 1291 return res; 1292 } 1293 1294 tpacpi_rfkill_switches[id] = atp_rfk; 1295 1296 pr_info("rfkill switch %s: radio is %sblocked\n", 1297 name, (sw_state || hw_state) ? "" : "un"); 1298 return 0; 1299 } 1300 1301 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1302 { 1303 struct tpacpi_rfk *tp_rfk; 1304 1305 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1306 1307 tp_rfk = tpacpi_rfkill_switches[id]; 1308 if (tp_rfk) { 1309 rfkill_unregister(tp_rfk->rfkill); 1310 rfkill_destroy(tp_rfk->rfkill); 1311 tpacpi_rfkill_switches[id] = NULL; 1312 kfree(tp_rfk); 1313 } 1314 } 1315 1316 static void printk_deprecated_rfkill_attribute(const char * const what) 1317 { 1318 printk_deprecated_attribute(what, 1319 "Please switch to generic rfkill before year 2010"); 1320 } 1321 1322 /* sysfs <radio> enable ------------------------------------------------ */ 1323 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1324 struct device_attribute *attr, 1325 char *buf) 1326 { 1327 int status; 1328 1329 printk_deprecated_rfkill_attribute(attr->attr.name); 1330 1331 /* This is in the ABI... */ 1332 if (tpacpi_rfk_check_hwblock_state()) { 1333 status = TPACPI_RFK_RADIO_OFF; 1334 } else { 1335 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1336 if (status < 0) 1337 return status; 1338 } 1339 1340 return snprintf(buf, PAGE_SIZE, "%d\n", 1341 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1342 } 1343 1344 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1345 struct device_attribute *attr, 1346 const char *buf, size_t count) 1347 { 1348 unsigned long t; 1349 int res; 1350 1351 printk_deprecated_rfkill_attribute(attr->attr.name); 1352 1353 if (parse_strtoul(buf, 1, &t)) 1354 return -EINVAL; 1355 1356 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1357 1358 /* This is in the ABI... */ 1359 if (tpacpi_rfk_check_hwblock_state() && !!t) 1360 return -EPERM; 1361 1362 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1363 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1364 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1365 1366 return (res < 0) ? res : count; 1367 } 1368 1369 /* procfs -------------------------------------------------------------- */ 1370 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1371 { 1372 if (id >= TPACPI_RFK_SW_MAX) 1373 seq_printf(m, "status:\t\tnot supported\n"); 1374 else { 1375 int status; 1376 1377 /* This is in the ABI... */ 1378 if (tpacpi_rfk_check_hwblock_state()) { 1379 status = TPACPI_RFK_RADIO_OFF; 1380 } else { 1381 status = tpacpi_rfk_update_swstate( 1382 tpacpi_rfkill_switches[id]); 1383 if (status < 0) 1384 return status; 1385 } 1386 1387 seq_printf(m, "status:\t\t%s\n", 1388 (status == TPACPI_RFK_RADIO_ON) ? 1389 "enabled" : "disabled"); 1390 seq_printf(m, "commands:\tenable, disable\n"); 1391 } 1392 1393 return 0; 1394 } 1395 1396 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1397 { 1398 char *cmd; 1399 int status = -1; 1400 int res = 0; 1401 1402 if (id >= TPACPI_RFK_SW_MAX) 1403 return -ENODEV; 1404 1405 while ((cmd = next_cmd(&buf))) { 1406 if (strlencmp(cmd, "enable") == 0) 1407 status = TPACPI_RFK_RADIO_ON; 1408 else if (strlencmp(cmd, "disable") == 0) 1409 status = TPACPI_RFK_RADIO_OFF; 1410 else 1411 return -EINVAL; 1412 } 1413 1414 if (status != -1) { 1415 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1416 (status == TPACPI_RFK_RADIO_ON) ? 1417 "enable" : "disable", 1418 tpacpi_rfkill_names[id]); 1419 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1420 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1421 } 1422 1423 return res; 1424 } 1425 1426 /************************************************************************* 1427 * thinkpad-acpi driver attributes 1428 */ 1429 1430 /* interface_version --------------------------------------------------- */ 1431 static ssize_t tpacpi_driver_interface_version_show( 1432 struct device_driver *drv, 1433 char *buf) 1434 { 1435 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1436 } 1437 1438 static DRIVER_ATTR(interface_version, S_IRUGO, 1439 tpacpi_driver_interface_version_show, NULL); 1440 1441 /* debug_level --------------------------------------------------------- */ 1442 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1443 char *buf) 1444 { 1445 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1446 } 1447 1448 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1449 const char *buf, size_t count) 1450 { 1451 unsigned long t; 1452 1453 if (parse_strtoul(buf, 0xffff, &t)) 1454 return -EINVAL; 1455 1456 dbg_level = t; 1457 1458 return count; 1459 } 1460 1461 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1462 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1463 1464 /* version ------------------------------------------------------------- */ 1465 static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1466 char *buf) 1467 { 1468 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1469 TPACPI_DESC, TPACPI_VERSION); 1470 } 1471 1472 static DRIVER_ATTR(version, S_IRUGO, 1473 tpacpi_driver_version_show, NULL); 1474 1475 /* --------------------------------------------------------------------- */ 1476 1477 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1478 1479 /* wlsw_emulstate ------------------------------------------------------ */ 1480 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1481 char *buf) 1482 { 1483 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1484 } 1485 1486 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1487 const char *buf, size_t count) 1488 { 1489 unsigned long t; 1490 1491 if (parse_strtoul(buf, 1, &t)) 1492 return -EINVAL; 1493 1494 if (tpacpi_wlsw_emulstate != !!t) { 1495 tpacpi_wlsw_emulstate = !!t; 1496 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1497 } 1498 1499 return count; 1500 } 1501 1502 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1503 tpacpi_driver_wlsw_emulstate_show, 1504 tpacpi_driver_wlsw_emulstate_store); 1505 1506 /* bluetooth_emulstate ------------------------------------------------- */ 1507 static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1508 struct device_driver *drv, 1509 char *buf) 1510 { 1511 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1512 } 1513 1514 static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1515 struct device_driver *drv, 1516 const char *buf, size_t count) 1517 { 1518 unsigned long t; 1519 1520 if (parse_strtoul(buf, 1, &t)) 1521 return -EINVAL; 1522 1523 tpacpi_bluetooth_emulstate = !!t; 1524 1525 return count; 1526 } 1527 1528 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1529 tpacpi_driver_bluetooth_emulstate_show, 1530 tpacpi_driver_bluetooth_emulstate_store); 1531 1532 /* wwan_emulstate ------------------------------------------------- */ 1533 static ssize_t tpacpi_driver_wwan_emulstate_show( 1534 struct device_driver *drv, 1535 char *buf) 1536 { 1537 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1538 } 1539 1540 static ssize_t tpacpi_driver_wwan_emulstate_store( 1541 struct device_driver *drv, 1542 const char *buf, size_t count) 1543 { 1544 unsigned long t; 1545 1546 if (parse_strtoul(buf, 1, &t)) 1547 return -EINVAL; 1548 1549 tpacpi_wwan_emulstate = !!t; 1550 1551 return count; 1552 } 1553 1554 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1555 tpacpi_driver_wwan_emulstate_show, 1556 tpacpi_driver_wwan_emulstate_store); 1557 1558 /* uwb_emulstate ------------------------------------------------- */ 1559 static ssize_t tpacpi_driver_uwb_emulstate_show( 1560 struct device_driver *drv, 1561 char *buf) 1562 { 1563 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1564 } 1565 1566 static ssize_t tpacpi_driver_uwb_emulstate_store( 1567 struct device_driver *drv, 1568 const char *buf, size_t count) 1569 { 1570 unsigned long t; 1571 1572 if (parse_strtoul(buf, 1, &t)) 1573 return -EINVAL; 1574 1575 tpacpi_uwb_emulstate = !!t; 1576 1577 return count; 1578 } 1579 1580 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1581 tpacpi_driver_uwb_emulstate_show, 1582 tpacpi_driver_uwb_emulstate_store); 1583 #endif 1584 1585 /* --------------------------------------------------------------------- */ 1586 1587 static struct driver_attribute *tpacpi_driver_attributes[] = { 1588 &driver_attr_debug_level, &driver_attr_version, 1589 &driver_attr_interface_version, 1590 }; 1591 1592 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1593 { 1594 int i, res; 1595 1596 i = 0; 1597 res = 0; 1598 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1599 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1600 i++; 1601 } 1602 1603 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1604 if (!res && dbg_wlswemul) 1605 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1606 if (!res && dbg_bluetoothemul) 1607 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1608 if (!res && dbg_wwanemul) 1609 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1610 if (!res && dbg_uwbemul) 1611 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1612 #endif 1613 1614 return res; 1615 } 1616 1617 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1618 { 1619 int i; 1620 1621 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1622 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1623 1624 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1625 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1626 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1627 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1628 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1629 #endif 1630 } 1631 1632 /************************************************************************* 1633 * Firmware Data 1634 */ 1635 1636 /* 1637 * Table of recommended minimum BIOS versions 1638 * 1639 * Reasons for listing: 1640 * 1. Stable BIOS, listed because the unknown amount of 1641 * bugs and bad ACPI behaviour on older versions 1642 * 1643 * 2. BIOS or EC fw with known bugs that trigger on Linux 1644 * 1645 * 3. BIOS with known reduced functionality in older versions 1646 * 1647 * We recommend the latest BIOS and EC version. 1648 * We only support the latest BIOS and EC fw version as a rule. 1649 * 1650 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1651 * Information from users in ThinkWiki 1652 * 1653 * WARNING: we use this table also to detect that the machine is 1654 * a ThinkPad in some cases, so don't remove entries lightly. 1655 */ 1656 1657 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1658 { .vendor = (__v), \ 1659 .bios = TPID(__id1, __id2), \ 1660 .ec = TPACPI_MATCH_ANY, \ 1661 .quirks = TPACPI_MATCH_ANY << 16 \ 1662 | (__bv1) << 8 | (__bv2) } 1663 1664 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1665 __eid, __ev1, __ev2) \ 1666 { .vendor = (__v), \ 1667 .bios = TPID(__bid1, __bid2), \ 1668 .ec = __eid, \ 1669 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1670 | (__bv1) << 8 | (__bv2) } 1671 1672 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1673 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1674 1675 /* Outdated IBM BIOSes often lack the EC id string */ 1676 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1677 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1678 __bv1, __bv2, TPID(__id1, __id2), \ 1679 __ev1, __ev2), \ 1680 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1681 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1682 __ev1, __ev2) 1683 1684 /* Outdated IBM BIOSes often lack the EC id string */ 1685 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1686 __eid1, __eid2, __ev1, __ev2) \ 1687 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1688 __bv1, __bv2, TPID(__eid1, __eid2), \ 1689 __ev1, __ev2), \ 1690 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1691 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1692 __ev1, __ev2) 1693 1694 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1695 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1696 1697 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1698 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1699 __bv1, __bv2, TPID(__id1, __id2), \ 1700 __ev1, __ev2) 1701 1702 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1703 __eid1, __eid2, __ev1, __ev2) \ 1704 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1705 __bv1, __bv2, TPID(__eid1, __eid2), \ 1706 __ev1, __ev2) 1707 1708 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1709 /* Numeric models ------------------ */ 1710 /* FW MODEL BIOS VERS */ 1711 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1712 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1713 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1714 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1715 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1716 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1717 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1718 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1719 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1720 1721 /* A-series ------------------------- */ 1722 /* FW MODEL BIOS VERS EC VERS */ 1723 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1724 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1725 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1726 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1727 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1728 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1729 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1730 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1731 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1732 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1733 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1734 1735 /* G-series ------------------------- */ 1736 /* FW MODEL BIOS VERS */ 1737 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1738 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1739 1740 /* R-series, T-series --------------- */ 1741 /* FW MODEL BIOS VERS EC VERS */ 1742 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1743 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1744 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1745 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1746 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1747 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1748 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1749 T40/p, T41/p, T42/p (1) */ 1750 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1751 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1752 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1753 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1754 1755 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1756 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1757 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1758 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1759 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1760 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1761 1762 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1763 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1764 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1765 1766 /* BIOS FW BIOS VERS EC FW EC VERS */ 1767 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1768 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1769 1770 /* X-series ------------------------- */ 1771 /* FW MODEL BIOS VERS EC VERS */ 1772 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1773 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1774 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1775 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1776 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1777 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1778 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1779 1780 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1781 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1782 1783 /* (0) - older versions lack DMI EC fw string and functionality */ 1784 /* (1) - older versions known to lack functionality */ 1785 }; 1786 1787 #undef TPV_QL1 1788 #undef TPV_QL0 1789 #undef TPV_QI2 1790 #undef TPV_QI1 1791 #undef TPV_QI0 1792 #undef TPV_Q_X 1793 #undef TPV_Q 1794 1795 static void __init tpacpi_check_outdated_fw(void) 1796 { 1797 unsigned long fwvers; 1798 u16 ec_version, bios_version; 1799 1800 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1801 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1802 1803 if (!fwvers) 1804 return; 1805 1806 bios_version = fwvers & 0xffffU; 1807 ec_version = (fwvers >> 16) & 0xffffU; 1808 1809 /* note that unknown versions are set to 0x0000 and we use that */ 1810 if ((bios_version > thinkpad_id.bios_release) || 1811 (ec_version > thinkpad_id.ec_release && 1812 ec_version != TPACPI_MATCH_ANY)) { 1813 /* 1814 * The changelogs would let us track down the exact 1815 * reason, but it is just too much of a pain to track 1816 * it. We only list BIOSes that are either really 1817 * broken, or really stable to begin with, so it is 1818 * best if the user upgrades the firmware anyway. 1819 */ 1820 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1821 pr_warn("WARNING: This firmware may be missing critical bug " 1822 "fixes and/or important features\n"); 1823 } 1824 } 1825 1826 static bool __init tpacpi_is_fw_known(void) 1827 { 1828 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1829 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1830 } 1831 1832 /**************************************************************************** 1833 **************************************************************************** 1834 * 1835 * Subdrivers 1836 * 1837 **************************************************************************** 1838 ****************************************************************************/ 1839 1840 /************************************************************************* 1841 * thinkpad-acpi metadata subdriver 1842 */ 1843 1844 static int thinkpad_acpi_driver_read(struct seq_file *m) 1845 { 1846 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1847 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1848 return 0; 1849 } 1850 1851 static struct ibm_struct thinkpad_acpi_driver_data = { 1852 .name = "driver", 1853 .read = thinkpad_acpi_driver_read, 1854 }; 1855 1856 /************************************************************************* 1857 * Hotkey subdriver 1858 */ 1859 1860 /* 1861 * ThinkPad firmware event model 1862 * 1863 * The ThinkPad firmware has two main event interfaces: normal ACPI 1864 * notifications (which follow the ACPI standard), and a private event 1865 * interface. 1866 * 1867 * The private event interface also issues events for the hotkeys. As 1868 * the driver gained features, the event handling code ended up being 1869 * built around the hotkey subdriver. This will need to be refactored 1870 * to a more formal event API eventually. 1871 * 1872 * Some "hotkeys" are actually supposed to be used as event reports, 1873 * such as "brightness has changed", "volume has changed", depending on 1874 * the ThinkPad model and how the firmware is operating. 1875 * 1876 * Unlike other classes, hotkey-class events have mask/unmask control on 1877 * non-ancient firmware. However, how it behaves changes a lot with the 1878 * firmware model and version. 1879 */ 1880 1881 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1882 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1883 TP_ACPI_HOTKEYSCAN_FNF2, 1884 TP_ACPI_HOTKEYSCAN_FNF3, 1885 TP_ACPI_HOTKEYSCAN_FNF4, 1886 TP_ACPI_HOTKEYSCAN_FNF5, 1887 TP_ACPI_HOTKEYSCAN_FNF6, 1888 TP_ACPI_HOTKEYSCAN_FNF7, 1889 TP_ACPI_HOTKEYSCAN_FNF8, 1890 TP_ACPI_HOTKEYSCAN_FNF9, 1891 TP_ACPI_HOTKEYSCAN_FNF10, 1892 TP_ACPI_HOTKEYSCAN_FNF11, 1893 TP_ACPI_HOTKEYSCAN_FNF12, 1894 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1895 TP_ACPI_HOTKEYSCAN_FNINSERT, 1896 TP_ACPI_HOTKEYSCAN_FNDELETE, 1897 TP_ACPI_HOTKEYSCAN_FNHOME, 1898 TP_ACPI_HOTKEYSCAN_FNEND, 1899 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1900 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1901 TP_ACPI_HOTKEYSCAN_FNSPACE, 1902 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1903 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1904 TP_ACPI_HOTKEYSCAN_MUTE, 1905 TP_ACPI_HOTKEYSCAN_THINKPAD, 1906 TP_ACPI_HOTKEYSCAN_UNK1, 1907 TP_ACPI_HOTKEYSCAN_UNK2, 1908 TP_ACPI_HOTKEYSCAN_UNK3, 1909 TP_ACPI_HOTKEYSCAN_UNK4, 1910 TP_ACPI_HOTKEYSCAN_UNK5, 1911 TP_ACPI_HOTKEYSCAN_UNK6, 1912 TP_ACPI_HOTKEYSCAN_UNK7, 1913 TP_ACPI_HOTKEYSCAN_UNK8, 1914 1915 /* Hotkey keymap size */ 1916 TPACPI_HOTKEY_MAP_LEN 1917 }; 1918 1919 enum { /* Keys/events available through NVRAM polling */ 1920 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1921 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1922 }; 1923 1924 enum { /* Positions of some of the keys in hotkey masks */ 1925 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1926 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1927 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1928 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1929 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1930 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1931 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1932 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1933 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1934 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1935 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1936 }; 1937 1938 enum { /* NVRAM to ACPI HKEY group map */ 1939 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1940 TP_ACPI_HKEY_ZOOM_MASK | 1941 TP_ACPI_HKEY_DISPSWTCH_MASK | 1942 TP_ACPI_HKEY_HIBERNATE_MASK, 1943 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1944 TP_ACPI_HKEY_BRGHTDWN_MASK, 1945 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1946 TP_ACPI_HKEY_VOLDWN_MASK | 1947 TP_ACPI_HKEY_MUTE_MASK, 1948 }; 1949 1950 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1951 struct tp_nvram_state { 1952 u16 thinkpad_toggle:1; 1953 u16 zoom_toggle:1; 1954 u16 display_toggle:1; 1955 u16 thinklight_toggle:1; 1956 u16 hibernate_toggle:1; 1957 u16 displayexp_toggle:1; 1958 u16 display_state:1; 1959 u16 brightness_toggle:1; 1960 u16 volume_toggle:1; 1961 u16 mute:1; 1962 1963 u8 brightness_level; 1964 u8 volume_level; 1965 }; 1966 1967 /* kthread for the hotkey poller */ 1968 static struct task_struct *tpacpi_hotkey_task; 1969 1970 /* 1971 * Acquire mutex to write poller control variables as an 1972 * atomic block. 1973 * 1974 * Increment hotkey_config_change when changing them if you 1975 * want the kthread to forget old state. 1976 * 1977 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1978 */ 1979 static struct mutex hotkey_thread_data_mutex; 1980 static unsigned int hotkey_config_change; 1981 1982 /* 1983 * hotkey poller control variables 1984 * 1985 * Must be atomic or readers will also need to acquire mutex 1986 * 1987 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1988 * should be used only when the changes need to be taken as 1989 * a block, OR when one needs to force the kthread to forget 1990 * old state. 1991 */ 1992 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 1993 static unsigned int hotkey_poll_freq = 10; /* Hz */ 1994 1995 #define HOTKEY_CONFIG_CRITICAL_START \ 1996 do { \ 1997 mutex_lock(&hotkey_thread_data_mutex); \ 1998 hotkey_config_change++; \ 1999 } while (0); 2000 #define HOTKEY_CONFIG_CRITICAL_END \ 2001 mutex_unlock(&hotkey_thread_data_mutex); 2002 2003 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2004 2005 #define hotkey_source_mask 0U 2006 #define HOTKEY_CONFIG_CRITICAL_START 2007 #define HOTKEY_CONFIG_CRITICAL_END 2008 2009 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2010 2011 static struct mutex hotkey_mutex; 2012 2013 static enum { /* Reasons for waking up */ 2014 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2015 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2016 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2017 } hotkey_wakeup_reason; 2018 2019 static int hotkey_autosleep_ack; 2020 2021 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2022 static u32 hotkey_all_mask; /* all events supported in fw */ 2023 static u32 hotkey_reserved_mask; /* events better left disabled */ 2024 static u32 hotkey_driver_mask; /* events needed by the driver */ 2025 static u32 hotkey_user_mask; /* events visible to userspace */ 2026 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2027 2028 static u16 *hotkey_keycode_map; 2029 2030 static struct attribute_set *hotkey_dev_attributes; 2031 2032 static void tpacpi_driver_event(const unsigned int hkey_event); 2033 static void hotkey_driver_event(const unsigned int scancode); 2034 static void hotkey_poll_setup(const bool may_warn); 2035 2036 /* HKEY.MHKG() return bits */ 2037 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2038 2039 static int hotkey_get_wlsw(void) 2040 { 2041 int status; 2042 2043 if (!tp_features.hotkey_wlsw) 2044 return -ENODEV; 2045 2046 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2047 if (dbg_wlswemul) 2048 return (tpacpi_wlsw_emulstate) ? 2049 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2050 #endif 2051 2052 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2053 return -EIO; 2054 2055 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2056 } 2057 2058 static int hotkey_get_tablet_mode(int *status) 2059 { 2060 int s; 2061 2062 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2063 return -EIO; 2064 2065 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2066 return 0; 2067 } 2068 2069 /* 2070 * Reads current event mask from firmware, and updates 2071 * hotkey_acpi_mask accordingly. Also resets any bits 2072 * from hotkey_user_mask that are unavailable to be 2073 * delivered (shadow requirement of the userspace ABI). 2074 * 2075 * Call with hotkey_mutex held 2076 */ 2077 static int hotkey_mask_get(void) 2078 { 2079 if (tp_features.hotkey_mask) { 2080 u32 m = 0; 2081 2082 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2083 return -EIO; 2084 2085 hotkey_acpi_mask = m; 2086 } else { 2087 /* no mask support doesn't mean no event support... */ 2088 hotkey_acpi_mask = hotkey_all_mask; 2089 } 2090 2091 /* sync userspace-visible mask */ 2092 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2093 2094 return 0; 2095 } 2096 2097 void static hotkey_mask_warn_incomplete_mask(void) 2098 { 2099 /* log only what the user can fix... */ 2100 const u32 wantedmask = hotkey_driver_mask & 2101 ~(hotkey_acpi_mask | hotkey_source_mask) & 2102 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2103 2104 if (wantedmask) 2105 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2106 } 2107 2108 /* 2109 * Set the firmware mask when supported 2110 * 2111 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2112 * 2113 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2114 * 2115 * Call with hotkey_mutex held 2116 */ 2117 static int hotkey_mask_set(u32 mask) 2118 { 2119 int i; 2120 int rc = 0; 2121 2122 const u32 fwmask = mask & ~hotkey_source_mask; 2123 2124 if (tp_features.hotkey_mask) { 2125 for (i = 0; i < 32; i++) { 2126 if (!acpi_evalf(hkey_handle, 2127 NULL, "MHKM", "vdd", i + 1, 2128 !!(mask & (1 << i)))) { 2129 rc = -EIO; 2130 break; 2131 } 2132 } 2133 } 2134 2135 /* 2136 * We *must* make an inconditional call to hotkey_mask_get to 2137 * refresh hotkey_acpi_mask and update hotkey_user_mask 2138 * 2139 * Take the opportunity to also log when we cannot _enable_ 2140 * a given event. 2141 */ 2142 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2143 pr_notice("asked for hotkey mask 0x%08x, but " 2144 "firmware forced it to 0x%08x\n", 2145 fwmask, hotkey_acpi_mask); 2146 } 2147 2148 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2149 hotkey_mask_warn_incomplete_mask(); 2150 2151 return rc; 2152 } 2153 2154 /* 2155 * Sets hotkey_user_mask and tries to set the firmware mask 2156 * 2157 * Call with hotkey_mutex held 2158 */ 2159 static int hotkey_user_mask_set(const u32 mask) 2160 { 2161 int rc; 2162 2163 /* Give people a chance to notice they are doing something that 2164 * is bound to go boom on their users sooner or later */ 2165 if (!tp_warned.hotkey_mask_ff && 2166 (mask == 0xffff || mask == 0xffffff || 2167 mask == 0xffffffff)) { 2168 tp_warned.hotkey_mask_ff = 1; 2169 pr_notice("setting the hotkey mask to 0x%08x is likely " 2170 "not the best way to go about it\n", mask); 2171 pr_notice("please consider using the driver defaults, " 2172 "and refer to up-to-date thinkpad-acpi " 2173 "documentation\n"); 2174 } 2175 2176 /* Try to enable what the user asked for, plus whatever we need. 2177 * this syncs everything but won't enable bits in hotkey_user_mask */ 2178 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2179 2180 /* Enable the available bits in hotkey_user_mask */ 2181 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2182 2183 return rc; 2184 } 2185 2186 /* 2187 * Sets the driver hotkey mask. 2188 * 2189 * Can be called even if the hotkey subdriver is inactive 2190 */ 2191 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2192 { 2193 int rc; 2194 2195 /* Do the right thing if hotkey_init has not been called yet */ 2196 if (!tp_features.hotkey) { 2197 hotkey_driver_mask = mask; 2198 return 0; 2199 } 2200 2201 mutex_lock(&hotkey_mutex); 2202 2203 HOTKEY_CONFIG_CRITICAL_START 2204 hotkey_driver_mask = mask; 2205 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2206 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2207 #endif 2208 HOTKEY_CONFIG_CRITICAL_END 2209 2210 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2211 ~hotkey_source_mask); 2212 hotkey_poll_setup(true); 2213 2214 mutex_unlock(&hotkey_mutex); 2215 2216 return rc; 2217 } 2218 2219 static int hotkey_status_get(int *status) 2220 { 2221 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2222 return -EIO; 2223 2224 return 0; 2225 } 2226 2227 static int hotkey_status_set(bool enable) 2228 { 2229 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2230 return -EIO; 2231 2232 return 0; 2233 } 2234 2235 static void tpacpi_input_send_tabletsw(void) 2236 { 2237 int state; 2238 2239 if (tp_features.hotkey_tablet && 2240 !hotkey_get_tablet_mode(&state)) { 2241 mutex_lock(&tpacpi_inputdev_send_mutex); 2242 2243 input_report_switch(tpacpi_inputdev, 2244 SW_TABLET_MODE, !!state); 2245 input_sync(tpacpi_inputdev); 2246 2247 mutex_unlock(&tpacpi_inputdev_send_mutex); 2248 } 2249 } 2250 2251 /* Do NOT call without validating scancode first */ 2252 static void tpacpi_input_send_key(const unsigned int scancode) 2253 { 2254 const unsigned int keycode = hotkey_keycode_map[scancode]; 2255 2256 if (keycode != KEY_RESERVED) { 2257 mutex_lock(&tpacpi_inputdev_send_mutex); 2258 2259 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2260 input_report_key(tpacpi_inputdev, keycode, 1); 2261 input_sync(tpacpi_inputdev); 2262 2263 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2264 input_report_key(tpacpi_inputdev, keycode, 0); 2265 input_sync(tpacpi_inputdev); 2266 2267 mutex_unlock(&tpacpi_inputdev_send_mutex); 2268 } 2269 } 2270 2271 /* Do NOT call without validating scancode first */ 2272 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2273 { 2274 hotkey_driver_event(scancode); 2275 if (hotkey_user_mask & (1 << scancode)) 2276 tpacpi_input_send_key(scancode); 2277 } 2278 2279 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2280 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2281 2282 /* Do NOT call without validating scancode first */ 2283 static void tpacpi_hotkey_send_key(unsigned int scancode) 2284 { 2285 tpacpi_input_send_key_masked(scancode); 2286 } 2287 2288 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2289 { 2290 u8 d; 2291 2292 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2293 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2294 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2295 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2296 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2297 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2298 } 2299 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2300 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2301 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2302 } 2303 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2304 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2305 n->displayexp_toggle = 2306 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2307 } 2308 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2309 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2310 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2311 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2312 n->brightness_toggle = 2313 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2314 } 2315 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2316 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2317 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2318 >> TP_NVRAM_POS_LEVEL_VOLUME; 2319 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2320 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2321 } 2322 } 2323 2324 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2325 do { \ 2326 if ((event_mask & (1 << __scancode)) && \ 2327 oldn->__member != newn->__member) \ 2328 tpacpi_hotkey_send_key(__scancode); \ 2329 } while (0) 2330 2331 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2332 do { \ 2333 if (event_mask & (1 << __scancode)) \ 2334 tpacpi_hotkey_send_key(__scancode); \ 2335 } while (0) 2336 2337 static void issue_volchange(const unsigned int oldvol, 2338 const unsigned int newvol, 2339 const u32 event_mask) 2340 { 2341 unsigned int i = oldvol; 2342 2343 while (i > newvol) { 2344 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2345 i--; 2346 } 2347 while (i < newvol) { 2348 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2349 i++; 2350 } 2351 } 2352 2353 static void issue_brightnesschange(const unsigned int oldbrt, 2354 const unsigned int newbrt, 2355 const u32 event_mask) 2356 { 2357 unsigned int i = oldbrt; 2358 2359 while (i > newbrt) { 2360 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2361 i--; 2362 } 2363 while (i < newbrt) { 2364 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2365 i++; 2366 } 2367 } 2368 2369 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2370 struct tp_nvram_state *newn, 2371 const u32 event_mask) 2372 { 2373 2374 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2375 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2376 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2377 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2378 2379 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2380 2381 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2382 2383 /* 2384 * Handle volume 2385 * 2386 * This code is supposed to duplicate the IBM firmware behaviour: 2387 * - Pressing MUTE issues mute hotkey message, even when already mute 2388 * - Pressing Volume up/down issues volume up/down hotkey messages, 2389 * even when already at maximum or minimum volume 2390 * - The act of unmuting issues volume up/down notification, 2391 * depending which key was used to unmute 2392 * 2393 * We are constrained to what the NVRAM can tell us, which is not much 2394 * and certainly not enough if more than one volume hotkey was pressed 2395 * since the last poll cycle. 2396 * 2397 * Just to make our life interesting, some newer Lenovo ThinkPads have 2398 * bugs in the BIOS and may fail to update volume_toggle properly. 2399 */ 2400 if (newn->mute) { 2401 /* muted */ 2402 if (!oldn->mute || 2403 oldn->volume_toggle != newn->volume_toggle || 2404 oldn->volume_level != newn->volume_level) { 2405 /* recently muted, or repeated mute keypress, or 2406 * multiple presses ending in mute */ 2407 issue_volchange(oldn->volume_level, newn->volume_level, 2408 event_mask); 2409 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2410 } 2411 } else { 2412 /* unmute */ 2413 if (oldn->mute) { 2414 /* recently unmuted, issue 'unmute' keypress */ 2415 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2416 } 2417 if (oldn->volume_level != newn->volume_level) { 2418 issue_volchange(oldn->volume_level, newn->volume_level, 2419 event_mask); 2420 } else if (oldn->volume_toggle != newn->volume_toggle) { 2421 /* repeated vol up/down keypress at end of scale ? */ 2422 if (newn->volume_level == 0) 2423 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2424 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2425 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2426 } 2427 } 2428 2429 /* handle brightness */ 2430 if (oldn->brightness_level != newn->brightness_level) { 2431 issue_brightnesschange(oldn->brightness_level, 2432 newn->brightness_level, event_mask); 2433 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2434 /* repeated key presses that didn't change state */ 2435 if (newn->brightness_level == 0) 2436 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2437 else if (newn->brightness_level >= bright_maxlvl 2438 && !tp_features.bright_unkfw) 2439 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2440 } 2441 2442 #undef TPACPI_COMPARE_KEY 2443 #undef TPACPI_MAY_SEND_KEY 2444 } 2445 2446 /* 2447 * Polling driver 2448 * 2449 * We track all events in hotkey_source_mask all the time, since 2450 * most of them are edge-based. We only issue those requested by 2451 * hotkey_user_mask or hotkey_driver_mask, though. 2452 */ 2453 static int hotkey_kthread(void *data) 2454 { 2455 struct tp_nvram_state s[2]; 2456 u32 poll_mask, event_mask; 2457 unsigned int si, so; 2458 unsigned long t; 2459 unsigned int change_detector; 2460 unsigned int poll_freq; 2461 bool was_frozen; 2462 2463 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2464 goto exit; 2465 2466 set_freezable(); 2467 2468 so = 0; 2469 si = 1; 2470 t = 0; 2471 2472 /* Initial state for compares */ 2473 mutex_lock(&hotkey_thread_data_mutex); 2474 change_detector = hotkey_config_change; 2475 poll_mask = hotkey_source_mask; 2476 event_mask = hotkey_source_mask & 2477 (hotkey_driver_mask | hotkey_user_mask); 2478 poll_freq = hotkey_poll_freq; 2479 mutex_unlock(&hotkey_thread_data_mutex); 2480 hotkey_read_nvram(&s[so], poll_mask); 2481 2482 while (!kthread_should_stop()) { 2483 if (t == 0) { 2484 if (likely(poll_freq)) 2485 t = 1000/poll_freq; 2486 else 2487 t = 100; /* should never happen... */ 2488 } 2489 t = msleep_interruptible(t); 2490 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2491 break; 2492 2493 if (t > 0 && !was_frozen) 2494 continue; 2495 2496 mutex_lock(&hotkey_thread_data_mutex); 2497 if (was_frozen || hotkey_config_change != change_detector) { 2498 /* forget old state on thaw or config change */ 2499 si = so; 2500 t = 0; 2501 change_detector = hotkey_config_change; 2502 } 2503 poll_mask = hotkey_source_mask; 2504 event_mask = hotkey_source_mask & 2505 (hotkey_driver_mask | hotkey_user_mask); 2506 poll_freq = hotkey_poll_freq; 2507 mutex_unlock(&hotkey_thread_data_mutex); 2508 2509 if (likely(poll_mask)) { 2510 hotkey_read_nvram(&s[si], poll_mask); 2511 if (likely(si != so)) { 2512 hotkey_compare_and_issue_event(&s[so], &s[si], 2513 event_mask); 2514 } 2515 } 2516 2517 so = si; 2518 si ^= 1; 2519 } 2520 2521 exit: 2522 return 0; 2523 } 2524 2525 /* call with hotkey_mutex held */ 2526 static void hotkey_poll_stop_sync(void) 2527 { 2528 if (tpacpi_hotkey_task) { 2529 kthread_stop(tpacpi_hotkey_task); 2530 tpacpi_hotkey_task = NULL; 2531 } 2532 } 2533 2534 /* call with hotkey_mutex held */ 2535 static void hotkey_poll_setup(const bool may_warn) 2536 { 2537 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2538 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2539 2540 if (hotkey_poll_freq > 0 && 2541 (poll_driver_mask || 2542 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2543 if (!tpacpi_hotkey_task) { 2544 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2545 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2546 if (IS_ERR(tpacpi_hotkey_task)) { 2547 tpacpi_hotkey_task = NULL; 2548 pr_err("could not create kernel thread " 2549 "for hotkey polling\n"); 2550 } 2551 } 2552 } else { 2553 hotkey_poll_stop_sync(); 2554 if (may_warn && (poll_driver_mask || poll_user_mask) && 2555 hotkey_poll_freq == 0) { 2556 pr_notice("hot keys 0x%08x and/or events 0x%08x " 2557 "require polling, which is currently " 2558 "disabled\n", 2559 poll_user_mask, poll_driver_mask); 2560 } 2561 } 2562 } 2563 2564 static void hotkey_poll_setup_safe(const bool may_warn) 2565 { 2566 mutex_lock(&hotkey_mutex); 2567 hotkey_poll_setup(may_warn); 2568 mutex_unlock(&hotkey_mutex); 2569 } 2570 2571 /* call with hotkey_mutex held */ 2572 static void hotkey_poll_set_freq(unsigned int freq) 2573 { 2574 if (!freq) 2575 hotkey_poll_stop_sync(); 2576 2577 hotkey_poll_freq = freq; 2578 } 2579 2580 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2581 2582 static void hotkey_poll_setup(const bool __unused) 2583 { 2584 } 2585 2586 static void hotkey_poll_setup_safe(const bool __unused) 2587 { 2588 } 2589 2590 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2591 2592 static int hotkey_inputdev_open(struct input_dev *dev) 2593 { 2594 switch (tpacpi_lifecycle) { 2595 case TPACPI_LIFE_INIT: 2596 case TPACPI_LIFE_RUNNING: 2597 hotkey_poll_setup_safe(false); 2598 return 0; 2599 case TPACPI_LIFE_EXITING: 2600 return -EBUSY; 2601 } 2602 2603 /* Should only happen if tpacpi_lifecycle is corrupt */ 2604 BUG(); 2605 return -EBUSY; 2606 } 2607 2608 static void hotkey_inputdev_close(struct input_dev *dev) 2609 { 2610 /* disable hotkey polling when possible */ 2611 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2612 !(hotkey_source_mask & hotkey_driver_mask)) 2613 hotkey_poll_setup_safe(false); 2614 } 2615 2616 /* sysfs hotkey enable ------------------------------------------------- */ 2617 static ssize_t hotkey_enable_show(struct device *dev, 2618 struct device_attribute *attr, 2619 char *buf) 2620 { 2621 int res, status; 2622 2623 printk_deprecated_attribute("hotkey_enable", 2624 "Hotkey reporting is always enabled"); 2625 2626 res = hotkey_status_get(&status); 2627 if (res) 2628 return res; 2629 2630 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2631 } 2632 2633 static ssize_t hotkey_enable_store(struct device *dev, 2634 struct device_attribute *attr, 2635 const char *buf, size_t count) 2636 { 2637 unsigned long t; 2638 2639 printk_deprecated_attribute("hotkey_enable", 2640 "Hotkeys can be disabled through hotkey_mask"); 2641 2642 if (parse_strtoul(buf, 1, &t)) 2643 return -EINVAL; 2644 2645 if (t == 0) 2646 return -EPERM; 2647 2648 return count; 2649 } 2650 2651 static struct device_attribute dev_attr_hotkey_enable = 2652 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO, 2653 hotkey_enable_show, hotkey_enable_store); 2654 2655 /* sysfs hotkey mask --------------------------------------------------- */ 2656 static ssize_t hotkey_mask_show(struct device *dev, 2657 struct device_attribute *attr, 2658 char *buf) 2659 { 2660 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2661 } 2662 2663 static ssize_t hotkey_mask_store(struct device *dev, 2664 struct device_attribute *attr, 2665 const char *buf, size_t count) 2666 { 2667 unsigned long t; 2668 int res; 2669 2670 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2671 return -EINVAL; 2672 2673 if (mutex_lock_killable(&hotkey_mutex)) 2674 return -ERESTARTSYS; 2675 2676 res = hotkey_user_mask_set(t); 2677 2678 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2679 hotkey_poll_setup(true); 2680 #endif 2681 2682 mutex_unlock(&hotkey_mutex); 2683 2684 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2685 2686 return (res) ? res : count; 2687 } 2688 2689 static struct device_attribute dev_attr_hotkey_mask = 2690 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO, 2691 hotkey_mask_show, hotkey_mask_store); 2692 2693 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2694 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2695 struct device_attribute *attr, 2696 char *buf) 2697 { 2698 return sprintf(buf, "0\n"); 2699 } 2700 2701 static struct device_attribute dev_attr_hotkey_bios_enabled = 2702 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL); 2703 2704 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2705 static ssize_t hotkey_bios_mask_show(struct device *dev, 2706 struct device_attribute *attr, 2707 char *buf) 2708 { 2709 printk_deprecated_attribute("hotkey_bios_mask", 2710 "This attribute is useless."); 2711 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2712 } 2713 2714 static struct device_attribute dev_attr_hotkey_bios_mask = 2715 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL); 2716 2717 /* sysfs hotkey all_mask ----------------------------------------------- */ 2718 static ssize_t hotkey_all_mask_show(struct device *dev, 2719 struct device_attribute *attr, 2720 char *buf) 2721 { 2722 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2723 hotkey_all_mask | hotkey_source_mask); 2724 } 2725 2726 static struct device_attribute dev_attr_hotkey_all_mask = 2727 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL); 2728 2729 /* sysfs hotkey recommended_mask --------------------------------------- */ 2730 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2731 struct device_attribute *attr, 2732 char *buf) 2733 { 2734 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2735 (hotkey_all_mask | hotkey_source_mask) 2736 & ~hotkey_reserved_mask); 2737 } 2738 2739 static struct device_attribute dev_attr_hotkey_recommended_mask = 2740 __ATTR(hotkey_recommended_mask, S_IRUGO, 2741 hotkey_recommended_mask_show, NULL); 2742 2743 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2744 2745 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2746 static ssize_t hotkey_source_mask_show(struct device *dev, 2747 struct device_attribute *attr, 2748 char *buf) 2749 { 2750 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2751 } 2752 2753 static ssize_t hotkey_source_mask_store(struct device *dev, 2754 struct device_attribute *attr, 2755 const char *buf, size_t count) 2756 { 2757 unsigned long t; 2758 u32 r_ev; 2759 int rc; 2760 2761 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2762 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2763 return -EINVAL; 2764 2765 if (mutex_lock_killable(&hotkey_mutex)) 2766 return -ERESTARTSYS; 2767 2768 HOTKEY_CONFIG_CRITICAL_START 2769 hotkey_source_mask = t; 2770 HOTKEY_CONFIG_CRITICAL_END 2771 2772 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2773 ~hotkey_source_mask); 2774 hotkey_poll_setup(true); 2775 2776 /* check if events needed by the driver got disabled */ 2777 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2778 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2779 2780 mutex_unlock(&hotkey_mutex); 2781 2782 if (rc < 0) 2783 pr_err("hotkey_source_mask: " 2784 "failed to update the firmware event mask!\n"); 2785 2786 if (r_ev) 2787 pr_notice("hotkey_source_mask: " 2788 "some important events were disabled: 0x%04x\n", 2789 r_ev); 2790 2791 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2792 2793 return (rc < 0) ? rc : count; 2794 } 2795 2796 static struct device_attribute dev_attr_hotkey_source_mask = 2797 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO, 2798 hotkey_source_mask_show, hotkey_source_mask_store); 2799 2800 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2801 static ssize_t hotkey_poll_freq_show(struct device *dev, 2802 struct device_attribute *attr, 2803 char *buf) 2804 { 2805 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2806 } 2807 2808 static ssize_t hotkey_poll_freq_store(struct device *dev, 2809 struct device_attribute *attr, 2810 const char *buf, size_t count) 2811 { 2812 unsigned long t; 2813 2814 if (parse_strtoul(buf, 25, &t)) 2815 return -EINVAL; 2816 2817 if (mutex_lock_killable(&hotkey_mutex)) 2818 return -ERESTARTSYS; 2819 2820 hotkey_poll_set_freq(t); 2821 hotkey_poll_setup(true); 2822 2823 mutex_unlock(&hotkey_mutex); 2824 2825 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2826 2827 return count; 2828 } 2829 2830 static struct device_attribute dev_attr_hotkey_poll_freq = 2831 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO, 2832 hotkey_poll_freq_show, hotkey_poll_freq_store); 2833 2834 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2835 2836 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2837 static ssize_t hotkey_radio_sw_show(struct device *dev, 2838 struct device_attribute *attr, 2839 char *buf) 2840 { 2841 int res; 2842 res = hotkey_get_wlsw(); 2843 if (res < 0) 2844 return res; 2845 2846 /* Opportunistic update */ 2847 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2848 2849 return snprintf(buf, PAGE_SIZE, "%d\n", 2850 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2851 } 2852 2853 static struct device_attribute dev_attr_hotkey_radio_sw = 2854 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL); 2855 2856 static void hotkey_radio_sw_notify_change(void) 2857 { 2858 if (tp_features.hotkey_wlsw) 2859 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2860 "hotkey_radio_sw"); 2861 } 2862 2863 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2864 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2865 struct device_attribute *attr, 2866 char *buf) 2867 { 2868 int res, s; 2869 res = hotkey_get_tablet_mode(&s); 2870 if (res < 0) 2871 return res; 2872 2873 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2874 } 2875 2876 static struct device_attribute dev_attr_hotkey_tablet_mode = 2877 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL); 2878 2879 static void hotkey_tablet_mode_notify_change(void) 2880 { 2881 if (tp_features.hotkey_tablet) 2882 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2883 "hotkey_tablet_mode"); 2884 } 2885 2886 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2887 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2888 struct device_attribute *attr, 2889 char *buf) 2890 { 2891 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2892 } 2893 2894 static struct device_attribute dev_attr_hotkey_wakeup_reason = 2895 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2896 2897 static void hotkey_wakeup_reason_notify_change(void) 2898 { 2899 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2900 "wakeup_reason"); 2901 } 2902 2903 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2904 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2905 struct device_attribute *attr, 2906 char *buf) 2907 { 2908 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2909 } 2910 2911 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete = 2912 __ATTR(wakeup_hotunplug_complete, S_IRUGO, 2913 hotkey_wakeup_hotunplug_complete_show, NULL); 2914 2915 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2916 { 2917 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2918 "wakeup_hotunplug_complete"); 2919 } 2920 2921 /* --------------------------------------------------------------------- */ 2922 2923 static struct attribute *hotkey_attributes[] __initdata = { 2924 &dev_attr_hotkey_enable.attr, 2925 &dev_attr_hotkey_bios_enabled.attr, 2926 &dev_attr_hotkey_bios_mask.attr, 2927 &dev_attr_hotkey_wakeup_reason.attr, 2928 &dev_attr_hotkey_wakeup_hotunplug_complete.attr, 2929 &dev_attr_hotkey_mask.attr, 2930 &dev_attr_hotkey_all_mask.attr, 2931 &dev_attr_hotkey_recommended_mask.attr, 2932 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2933 &dev_attr_hotkey_source_mask.attr, 2934 &dev_attr_hotkey_poll_freq.attr, 2935 #endif 2936 }; 2937 2938 /* 2939 * Sync both the hw and sw blocking state of all switches 2940 */ 2941 static void tpacpi_send_radiosw_update(void) 2942 { 2943 int wlsw; 2944 2945 /* 2946 * We must sync all rfkill controllers *before* issuing any 2947 * rfkill input events, or we will race the rfkill core input 2948 * handler. 2949 * 2950 * tpacpi_inputdev_send_mutex works as a synchronization point 2951 * for the above. 2952 * 2953 * We optimize to avoid numerous calls to hotkey_get_wlsw. 2954 */ 2955 2956 wlsw = hotkey_get_wlsw(); 2957 2958 /* Sync hw blocking state first if it is hw-blocked */ 2959 if (wlsw == TPACPI_RFK_RADIO_OFF) 2960 tpacpi_rfk_update_hwblock_state(true); 2961 2962 /* Sync sw blocking state */ 2963 tpacpi_rfk_update_swstate_all(); 2964 2965 /* Sync hw blocking state last if it is hw-unblocked */ 2966 if (wlsw == TPACPI_RFK_RADIO_ON) 2967 tpacpi_rfk_update_hwblock_state(false); 2968 2969 /* Issue rfkill input event for WLSW switch */ 2970 if (!(wlsw < 0)) { 2971 mutex_lock(&tpacpi_inputdev_send_mutex); 2972 2973 input_report_switch(tpacpi_inputdev, 2974 SW_RFKILL_ALL, (wlsw > 0)); 2975 input_sync(tpacpi_inputdev); 2976 2977 mutex_unlock(&tpacpi_inputdev_send_mutex); 2978 } 2979 2980 /* 2981 * this can be unconditional, as we will poll state again 2982 * if userspace uses the notify to read data 2983 */ 2984 hotkey_radio_sw_notify_change(); 2985 } 2986 2987 static void hotkey_exit(void) 2988 { 2989 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2990 mutex_lock(&hotkey_mutex); 2991 hotkey_poll_stop_sync(); 2992 mutex_unlock(&hotkey_mutex); 2993 #endif 2994 2995 if (hotkey_dev_attributes) 2996 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 2997 2998 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 2999 "restoring original HKEY status and mask\n"); 3000 /* yes, there is a bitwise or below, we want the 3001 * functions to be called even if one of them fail */ 3002 if (((tp_features.hotkey_mask && 3003 hotkey_mask_set(hotkey_orig_mask)) | 3004 hotkey_status_set(false)) != 0) 3005 pr_err("failed to restore hot key mask " 3006 "to BIOS defaults\n"); 3007 } 3008 3009 static void __init hotkey_unmap(const unsigned int scancode) 3010 { 3011 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3012 clear_bit(hotkey_keycode_map[scancode], 3013 tpacpi_inputdev->keybit); 3014 hotkey_keycode_map[scancode] = KEY_RESERVED; 3015 } 3016 } 3017 3018 /* 3019 * HKEY quirks: 3020 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3021 */ 3022 3023 #define TPACPI_HK_Q_INIMASK 0x0001 3024 3025 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3026 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3027 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3028 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3029 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3030 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3031 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3032 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3033 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3034 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3035 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3036 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3037 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3038 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3039 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3040 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3041 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3042 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3043 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3044 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3045 }; 3046 3047 typedef u16 tpacpi_keymap_entry_t; 3048 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3049 3050 static int __init hotkey_init(struct ibm_init_struct *iibm) 3051 { 3052 /* Requirements for changing the default keymaps: 3053 * 3054 * 1. Many of the keys are mapped to KEY_RESERVED for very 3055 * good reasons. Do not change them unless you have deep 3056 * knowledge on the IBM and Lenovo ThinkPad firmware for 3057 * the various ThinkPad models. The driver behaves 3058 * differently for KEY_RESERVED: such keys have their 3059 * hot key mask *unset* in mask_recommended, and also 3060 * in the initial hot key mask programmed into the 3061 * firmware at driver load time, which means the firm- 3062 * ware may react very differently if you change them to 3063 * something else; 3064 * 3065 * 2. You must be subscribed to the linux-thinkpad and 3066 * ibm-acpi-devel mailing lists, and you should read the 3067 * list archives since 2007 if you want to change the 3068 * keymaps. This requirement exists so that you will 3069 * know the past history of problems with the thinkpad- 3070 * acpi driver keymaps, and also that you will be 3071 * listening to any bug reports; 3072 * 3073 * 3. Do not send thinkpad-acpi specific patches directly to 3074 * for merging, *ever*. Send them to the linux-acpi 3075 * mailinglist for comments. Merging is to be done only 3076 * through acpi-test and the ACPI maintainer. 3077 * 3078 * If the above is too much to ask, don't change the keymap. 3079 * Ask the thinkpad-acpi maintainer to do it, instead. 3080 */ 3081 3082 enum keymap_index { 3083 TPACPI_KEYMAP_IBM_GENERIC = 0, 3084 TPACPI_KEYMAP_LENOVO_GENERIC, 3085 }; 3086 3087 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3088 /* Generic keymap for IBM ThinkPads */ 3089 [TPACPI_KEYMAP_IBM_GENERIC] = { 3090 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3091 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3092 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3093 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3094 3095 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3096 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3097 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3098 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3099 3100 /* brightness: firmware always reacts to them */ 3101 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3102 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3103 3104 /* Thinklight: firmware always react to it */ 3105 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3106 3107 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3108 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3109 3110 /* Volume: firmware always react to it and reprograms 3111 * the built-in *extra* mixer. Never map it to control 3112 * another mixer by default. */ 3113 KEY_RESERVED, /* 0x14: VOLUME UP */ 3114 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3115 KEY_RESERVED, /* 0x16: MUTE */ 3116 3117 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3118 3119 /* (assignments unknown, please report if found) */ 3120 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3121 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3122 }, 3123 3124 /* Generic keymap for Lenovo ThinkPads */ 3125 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3126 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3127 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3128 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3129 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3130 3131 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3132 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3133 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3134 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3135 3136 /* These should be enabled --only-- when ACPI video 3137 * is disabled (i.e. in "vendor" mode), and are handled 3138 * in a special way by the init code */ 3139 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3140 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3141 3142 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3143 3144 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3145 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3146 3147 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3148 * react to it and reprograms the built-in *extra* mixer. 3149 * Never map it to control another mixer by default. 3150 * 3151 * T60?, T61, R60?, R61: firmware and EC tries to send 3152 * these over the regular keyboard, so these are no-ops, 3153 * but there are still weird bugs re. MUTE, so do not 3154 * change unless you get test reports from all Lenovo 3155 * models. May cause the BIOS to interfere with the 3156 * HDA mixer. 3157 */ 3158 KEY_RESERVED, /* 0x14: VOLUME UP */ 3159 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3160 KEY_RESERVED, /* 0x16: MUTE */ 3161 3162 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3163 3164 /* (assignments unknown, please report if found) */ 3165 KEY_UNKNOWN, KEY_UNKNOWN, 3166 3167 /* 3168 * The mic mute button only sends 0x1a. It does not 3169 * automatically mute the mic or change the mute light. 3170 */ 3171 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3172 3173 /* (assignments unknown, please report if found) */ 3174 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3175 KEY_UNKNOWN, 3176 }, 3177 }; 3178 3179 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3180 /* Generic maps (fallback) */ 3181 { 3182 .vendor = PCI_VENDOR_ID_IBM, 3183 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3184 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3185 }, 3186 { 3187 .vendor = PCI_VENDOR_ID_LENOVO, 3188 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3189 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3190 }, 3191 }; 3192 3193 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3194 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3195 3196 int res, i; 3197 int status; 3198 int hkeyv; 3199 bool radiosw_state = false; 3200 bool tabletsw_state = false; 3201 3202 unsigned long quirks; 3203 unsigned long keymap_id; 3204 3205 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3206 "initializing hotkey subdriver\n"); 3207 3208 BUG_ON(!tpacpi_inputdev); 3209 BUG_ON(tpacpi_inputdev->open != NULL || 3210 tpacpi_inputdev->close != NULL); 3211 3212 TPACPI_ACPIHANDLE_INIT(hkey); 3213 mutex_init(&hotkey_mutex); 3214 3215 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3216 mutex_init(&hotkey_thread_data_mutex); 3217 #endif 3218 3219 /* hotkey not supported on 570 */ 3220 tp_features.hotkey = hkey_handle != NULL; 3221 3222 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3223 "hotkeys are %s\n", 3224 str_supported(tp_features.hotkey)); 3225 3226 if (!tp_features.hotkey) 3227 return 1; 3228 3229 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3230 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3231 3232 tpacpi_disable_brightness_delay(); 3233 3234 /* MUST have enough space for all attributes to be added to 3235 * hotkey_dev_attributes */ 3236 hotkey_dev_attributes = create_attr_set( 3237 ARRAY_SIZE(hotkey_attributes) + 2, 3238 NULL); 3239 if (!hotkey_dev_attributes) 3240 return -ENOMEM; 3241 res = add_many_to_attr_set(hotkey_dev_attributes, 3242 hotkey_attributes, 3243 ARRAY_SIZE(hotkey_attributes)); 3244 if (res) 3245 goto err_exit; 3246 3247 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3248 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3249 for HKEY interface version 0x100 */ 3250 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3251 if ((hkeyv >> 8) != 1) { 3252 pr_err("unknown version of the HKEY interface: 0x%x\n", 3253 hkeyv); 3254 pr_err("please report this to %s\n", TPACPI_MAIL); 3255 } else { 3256 /* 3257 * MHKV 0x100 in A31, R40, R40e, 3258 * T4x, X31, and later 3259 */ 3260 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3261 "firmware HKEY interface version: 0x%x\n", 3262 hkeyv); 3263 3264 /* Paranoia check AND init hotkey_all_mask */ 3265 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3266 "MHKA", "qd")) { 3267 pr_err("missing MHKA handler, " 3268 "please report this to %s\n", 3269 TPACPI_MAIL); 3270 /* Fallback: pre-init for FN+F3,F4,F12 */ 3271 hotkey_all_mask = 0x080cU; 3272 } else { 3273 tp_features.hotkey_mask = 1; 3274 } 3275 } 3276 } 3277 3278 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3279 "hotkey masks are %s\n", 3280 str_supported(tp_features.hotkey_mask)); 3281 3282 /* Init hotkey_all_mask if not initialized yet */ 3283 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3284 (quirks & TPACPI_HK_Q_INIMASK)) 3285 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3286 3287 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3288 if (tp_features.hotkey_mask) { 3289 /* hotkey_source_mask *must* be zero for 3290 * the first hotkey_mask_get to return hotkey_orig_mask */ 3291 res = hotkey_mask_get(); 3292 if (res) 3293 goto err_exit; 3294 3295 hotkey_orig_mask = hotkey_acpi_mask; 3296 } else { 3297 hotkey_orig_mask = hotkey_all_mask; 3298 hotkey_acpi_mask = hotkey_all_mask; 3299 } 3300 3301 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3302 if (dbg_wlswemul) { 3303 tp_features.hotkey_wlsw = 1; 3304 radiosw_state = !!tpacpi_wlsw_emulstate; 3305 pr_info("radio switch emulation enabled\n"); 3306 } else 3307 #endif 3308 /* Not all thinkpads have a hardware radio switch */ 3309 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3310 tp_features.hotkey_wlsw = 1; 3311 radiosw_state = !!status; 3312 pr_info("radio switch found; radios are %s\n", 3313 enabled(status, 0)); 3314 } 3315 if (tp_features.hotkey_wlsw) 3316 res = add_to_attr_set(hotkey_dev_attributes, 3317 &dev_attr_hotkey_radio_sw.attr); 3318 3319 /* For X41t, X60t, X61t Tablets... */ 3320 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3321 tp_features.hotkey_tablet = 1; 3322 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); 3323 pr_info("possible tablet mode switch found; " 3324 "ThinkPad in %s mode\n", 3325 (tabletsw_state) ? "tablet" : "laptop"); 3326 res = add_to_attr_set(hotkey_dev_attributes, 3327 &dev_attr_hotkey_tablet_mode.attr); 3328 } 3329 3330 if (!res) 3331 res = register_attr_set_with_sysfs( 3332 hotkey_dev_attributes, 3333 &tpacpi_pdev->dev.kobj); 3334 if (res) 3335 goto err_exit; 3336 3337 /* Set up key map */ 3338 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3339 GFP_KERNEL); 3340 if (!hotkey_keycode_map) { 3341 pr_err("failed to allocate memory for key map\n"); 3342 res = -ENOMEM; 3343 goto err_exit; 3344 } 3345 3346 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3347 ARRAY_SIZE(tpacpi_keymap_qtable)); 3348 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3349 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3350 "using keymap number %lu\n", keymap_id); 3351 3352 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3353 TPACPI_HOTKEY_MAP_SIZE); 3354 3355 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3356 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3357 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3358 tpacpi_inputdev->keycode = hotkey_keycode_map; 3359 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3360 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3361 input_set_capability(tpacpi_inputdev, EV_KEY, 3362 hotkey_keycode_map[i]); 3363 } else { 3364 if (i < sizeof(hotkey_reserved_mask)*8) 3365 hotkey_reserved_mask |= 1 << i; 3366 } 3367 } 3368 3369 if (tp_features.hotkey_wlsw) { 3370 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3371 input_report_switch(tpacpi_inputdev, 3372 SW_RFKILL_ALL, radiosw_state); 3373 } 3374 if (tp_features.hotkey_tablet) { 3375 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3376 input_report_switch(tpacpi_inputdev, 3377 SW_TABLET_MODE, tabletsw_state); 3378 } 3379 3380 /* Do not issue duplicate brightness change events to 3381 * userspace. tpacpi_detect_brightness_capabilities() must have 3382 * been called before this point */ 3383 if (acpi_video_backlight_support()) { 3384 pr_info("This ThinkPad has standard ACPI backlight " 3385 "brightness control, supported by the ACPI " 3386 "video driver\n"); 3387 pr_notice("Disabling thinkpad-acpi brightness events " 3388 "by default...\n"); 3389 3390 /* Disable brightness up/down on Lenovo thinkpads when 3391 * ACPI is handling them, otherwise it is plain impossible 3392 * for userspace to do something even remotely sane */ 3393 hotkey_reserved_mask |= 3394 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3395 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3396 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3397 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3398 } 3399 3400 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3401 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3402 & ~hotkey_all_mask 3403 & ~hotkey_reserved_mask; 3404 3405 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3406 "hotkey source mask 0x%08x, polling freq %u\n", 3407 hotkey_source_mask, hotkey_poll_freq); 3408 #endif 3409 3410 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3411 "enabling firmware HKEY event interface...\n"); 3412 res = hotkey_status_set(true); 3413 if (res) { 3414 hotkey_exit(); 3415 return res; 3416 } 3417 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3418 | hotkey_driver_mask) 3419 & ~hotkey_source_mask); 3420 if (res < 0 && res != -ENXIO) { 3421 hotkey_exit(); 3422 return res; 3423 } 3424 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3425 & ~hotkey_reserved_mask; 3426 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3427 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3428 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3429 3430 tpacpi_inputdev->open = &hotkey_inputdev_open; 3431 tpacpi_inputdev->close = &hotkey_inputdev_close; 3432 3433 hotkey_poll_setup_safe(true); 3434 3435 return 0; 3436 3437 err_exit: 3438 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3439 hotkey_dev_attributes = NULL; 3440 3441 return (res < 0)? res : 1; 3442 } 3443 3444 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3445 * mode, Web conference mode, Function mode and Lay-flat mode. 3446 * We support Home mode and Function mode currently. 3447 * 3448 * Will consider support rest of modes in future. 3449 * 3450 */ 3451 enum ADAPTIVE_KEY_MODE { 3452 HOME_MODE, 3453 WEB_BROWSER_MODE, 3454 WEB_CONFERENCE_MODE, 3455 FUNCTION_MODE, 3456 LAYFLAT_MODE 3457 }; 3458 3459 const int adaptive_keyboard_modes[] = { 3460 HOME_MODE, 3461 /* WEB_BROWSER_MODE = 2, 3462 WEB_CONFERENCE_MODE = 3, */ 3463 FUNCTION_MODE 3464 }; 3465 3466 #define DFR_CHANGE_ROW 0x101 3467 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3468 3469 /* press Fn key a while second, it will switch to Function Mode. Then 3470 * release Fn key, previous mode be restored. 3471 */ 3472 static bool adaptive_keyboard_mode_is_saved; 3473 static int adaptive_keyboard_prev_mode; 3474 3475 static int adaptive_keyboard_get_next_mode(int mode) 3476 { 3477 size_t i; 3478 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3479 3480 for (i = 0; i <= max_mode; i++) { 3481 if (adaptive_keyboard_modes[i] == mode) 3482 break; 3483 } 3484 3485 if (i >= max_mode) 3486 i = 0; 3487 else 3488 i++; 3489 3490 return adaptive_keyboard_modes[i]; 3491 } 3492 3493 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3494 { 3495 u32 current_mode = 0; 3496 int new_mode = 0; 3497 3498 switch (scancode) { 3499 case DFR_CHANGE_ROW: 3500 if (adaptive_keyboard_mode_is_saved) { 3501 new_mode = adaptive_keyboard_prev_mode; 3502 adaptive_keyboard_mode_is_saved = false; 3503 } else { 3504 if (!acpi_evalf( 3505 hkey_handle, ¤t_mode, 3506 "GTRW", "dd", 0)) { 3507 pr_err("Cannot read adaptive keyboard mode\n"); 3508 return false; 3509 } else { 3510 new_mode = adaptive_keyboard_get_next_mode( 3511 current_mode); 3512 } 3513 } 3514 3515 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3516 pr_err("Cannot set adaptive keyboard mode\n"); 3517 return false; 3518 } 3519 3520 return true; 3521 3522 case DFR_SHOW_QUICKVIEW_ROW: 3523 if (!acpi_evalf(hkey_handle, 3524 &adaptive_keyboard_prev_mode, 3525 "GTRW", "dd", 0)) { 3526 pr_err("Cannot read adaptive keyboard mode\n"); 3527 return false; 3528 } else { 3529 adaptive_keyboard_mode_is_saved = true; 3530 3531 if (!acpi_evalf(hkey_handle, 3532 NULL, "STRW", "vd", FUNCTION_MODE)) { 3533 pr_err("Cannot set adaptive keyboard mode\n"); 3534 return false; 3535 } 3536 } 3537 return true; 3538 3539 default: 3540 return false; 3541 } 3542 } 3543 3544 static bool hotkey_notify_hotkey(const u32 hkey, 3545 bool *send_acpi_ev, 3546 bool *ignore_acpi_ev) 3547 { 3548 /* 0x1000-0x1FFF: key presses */ 3549 unsigned int scancode = hkey & 0xfff; 3550 *send_acpi_ev = true; 3551 *ignore_acpi_ev = false; 3552 3553 /* HKEY event 0x1001 is scancode 0x00 */ 3554 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3555 scancode--; 3556 if (!(hotkey_source_mask & (1 << scancode))) { 3557 tpacpi_input_send_key_masked(scancode); 3558 *send_acpi_ev = false; 3559 } else { 3560 *ignore_acpi_ev = true; 3561 } 3562 return true; 3563 } else { 3564 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3565 } 3566 return false; 3567 } 3568 3569 static bool hotkey_notify_wakeup(const u32 hkey, 3570 bool *send_acpi_ev, 3571 bool *ignore_acpi_ev) 3572 { 3573 /* 0x2000-0x2FFF: Wakeup reason */ 3574 *send_acpi_ev = true; 3575 *ignore_acpi_ev = false; 3576 3577 switch (hkey) { 3578 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3579 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3580 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3581 *ignore_acpi_ev = true; 3582 break; 3583 3584 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3585 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3586 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3587 *ignore_acpi_ev = true; 3588 break; 3589 3590 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3591 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3592 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3593 /* how to auto-heal: */ 3594 /* 2313: woke up from S3, go to S4/S5 */ 3595 /* 2413: woke up from S4, go to S5 */ 3596 break; 3597 3598 default: 3599 return false; 3600 } 3601 3602 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3603 pr_info("woke up due to a hot-unplug request...\n"); 3604 hotkey_wakeup_reason_notify_change(); 3605 } 3606 return true; 3607 } 3608 3609 static bool hotkey_notify_dockevent(const u32 hkey, 3610 bool *send_acpi_ev, 3611 bool *ignore_acpi_ev) 3612 { 3613 /* 0x4000-0x4FFF: dock-related events */ 3614 *send_acpi_ev = true; 3615 *ignore_acpi_ev = false; 3616 3617 switch (hkey) { 3618 case TP_HKEY_EV_UNDOCK_ACK: 3619 /* ACPI undock operation completed after wakeup */ 3620 hotkey_autosleep_ack = 1; 3621 pr_info("undocked\n"); 3622 hotkey_wakeup_hotunplug_complete_notify_change(); 3623 return true; 3624 3625 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3626 pr_info("docked into hotplug port replicator\n"); 3627 return true; 3628 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3629 pr_info("undocked from hotplug port replicator\n"); 3630 return true; 3631 3632 default: 3633 return false; 3634 } 3635 } 3636 3637 static bool hotkey_notify_usrevent(const u32 hkey, 3638 bool *send_acpi_ev, 3639 bool *ignore_acpi_ev) 3640 { 3641 /* 0x5000-0x5FFF: human interface helpers */ 3642 *send_acpi_ev = true; 3643 *ignore_acpi_ev = false; 3644 3645 switch (hkey) { 3646 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3647 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3648 return true; 3649 3650 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3651 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3652 tpacpi_input_send_tabletsw(); 3653 hotkey_tablet_mode_notify_change(); 3654 *send_acpi_ev = false; 3655 return true; 3656 3657 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3658 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3659 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3660 /* do not propagate these events */ 3661 *ignore_acpi_ev = true; 3662 return true; 3663 3664 default: 3665 return false; 3666 } 3667 } 3668 3669 static void thermal_dump_all_sensors(void); 3670 3671 static bool hotkey_notify_6xxx(const u32 hkey, 3672 bool *send_acpi_ev, 3673 bool *ignore_acpi_ev) 3674 { 3675 bool known = true; 3676 3677 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 3678 *send_acpi_ev = true; 3679 *ignore_acpi_ev = false; 3680 3681 switch (hkey) { 3682 case TP_HKEY_EV_THM_TABLE_CHANGED: 3683 pr_info("EC reports that Thermal Table has changed\n"); 3684 /* recommended action: do nothing, we don't have 3685 * Lenovo ATM information */ 3686 return true; 3687 case TP_HKEY_EV_ALARM_BAT_HOT: 3688 pr_crit("THERMAL ALARM: battery is too hot!\n"); 3689 /* recommended action: warn user through gui */ 3690 break; 3691 case TP_HKEY_EV_ALARM_BAT_XHOT: 3692 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 3693 /* recommended action: immediate sleep/hibernate */ 3694 break; 3695 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3696 pr_crit("THERMAL ALARM: " 3697 "a sensor reports something is too hot!\n"); 3698 /* recommended action: warn user through gui, that */ 3699 /* some internal component is too hot */ 3700 break; 3701 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3702 pr_alert("THERMAL EMERGENCY: " 3703 "a sensor reports something is extremely hot!\n"); 3704 /* recommended action: immediate sleep/hibernate */ 3705 break; 3706 case TP_HKEY_EV_AC_CHANGED: 3707 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 3708 * AC status changed; can be triggered by plugging or 3709 * unplugging AC adapter, docking or undocking. */ 3710 3711 /* fallthrough */ 3712 3713 case TP_HKEY_EV_KEY_NUMLOCK: 3714 case TP_HKEY_EV_KEY_FN: 3715 /* key press events, we just ignore them as long as the EC 3716 * is still reporting them in the normal keyboard stream */ 3717 *send_acpi_ev = false; 3718 *ignore_acpi_ev = true; 3719 return true; 3720 3721 default: 3722 pr_warn("unknown possible thermal alarm or keyboard event received\n"); 3723 known = false; 3724 } 3725 3726 thermal_dump_all_sensors(); 3727 3728 return known; 3729 } 3730 3731 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3732 { 3733 u32 hkey; 3734 bool send_acpi_ev; 3735 bool ignore_acpi_ev; 3736 bool known_ev; 3737 3738 if (event != 0x80) { 3739 pr_err("unknown HKEY notification event %d\n", event); 3740 /* forward it to userspace, maybe it knows how to handle it */ 3741 acpi_bus_generate_netlink_event( 3742 ibm->acpi->device->pnp.device_class, 3743 dev_name(&ibm->acpi->device->dev), 3744 event, 0); 3745 return; 3746 } 3747 3748 while (1) { 3749 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3750 pr_err("failed to retrieve HKEY event\n"); 3751 return; 3752 } 3753 3754 if (hkey == 0) { 3755 /* queue empty */ 3756 return; 3757 } 3758 3759 send_acpi_ev = true; 3760 ignore_acpi_ev = false; 3761 3762 switch (hkey >> 12) { 3763 case 1: 3764 /* 0x1000-0x1FFF: key presses */ 3765 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3766 &ignore_acpi_ev); 3767 break; 3768 case 2: 3769 /* 0x2000-0x2FFF: Wakeup reason */ 3770 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3771 &ignore_acpi_ev); 3772 break; 3773 case 3: 3774 /* 0x3000-0x3FFF: bay-related wakeups */ 3775 switch (hkey) { 3776 case TP_HKEY_EV_BAYEJ_ACK: 3777 hotkey_autosleep_ack = 1; 3778 pr_info("bay ejected\n"); 3779 hotkey_wakeup_hotunplug_complete_notify_change(); 3780 known_ev = true; 3781 break; 3782 case TP_HKEY_EV_OPTDRV_EJ: 3783 /* FIXME: kick libata if SATA link offline */ 3784 known_ev = true; 3785 break; 3786 default: 3787 known_ev = false; 3788 } 3789 break; 3790 case 4: 3791 /* 0x4000-0x4FFF: dock-related events */ 3792 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 3793 &ignore_acpi_ev); 3794 break; 3795 case 5: 3796 /* 0x5000-0x5FFF: human interface helpers */ 3797 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3798 &ignore_acpi_ev); 3799 break; 3800 case 6: 3801 /* 0x6000-0x6FFF: thermal alarms/notices and 3802 * keyboard events */ 3803 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 3804 &ignore_acpi_ev); 3805 break; 3806 case 7: 3807 /* 0x7000-0x7FFF: misc */ 3808 if (tp_features.hotkey_wlsw && 3809 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3810 tpacpi_send_radiosw_update(); 3811 send_acpi_ev = 0; 3812 known_ev = true; 3813 break; 3814 } 3815 /* fallthrough to default */ 3816 default: 3817 known_ev = false; 3818 } 3819 if (!known_ev) { 3820 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 3821 pr_notice("please report the conditions when this " 3822 "event happened to %s\n", TPACPI_MAIL); 3823 } 3824 3825 /* netlink events */ 3826 if (!ignore_acpi_ev && send_acpi_ev) { 3827 acpi_bus_generate_netlink_event( 3828 ibm->acpi->device->pnp.device_class, 3829 dev_name(&ibm->acpi->device->dev), 3830 event, hkey); 3831 } 3832 } 3833 } 3834 3835 static void hotkey_suspend(void) 3836 { 3837 int hkeyv; 3838 3839 /* Do these on suspend, we get the events on early resume! */ 3840 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 3841 hotkey_autosleep_ack = 0; 3842 3843 /* save previous mode of adaptive keyboard of X1 Carbon */ 3844 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3845 if ((hkeyv >> 8) == 2) { 3846 if (!acpi_evalf(hkey_handle, 3847 &adaptive_keyboard_prev_mode, 3848 "GTRW", "dd", 0)) { 3849 pr_err("Cannot read adaptive keyboard mode.\n"); 3850 } 3851 } 3852 } 3853 } 3854 3855 static void hotkey_resume(void) 3856 { 3857 int hkeyv; 3858 3859 tpacpi_disable_brightness_delay(); 3860 3861 if (hotkey_status_set(true) < 0 || 3862 hotkey_mask_set(hotkey_acpi_mask) < 0) 3863 pr_err("error while attempting to reset the event " 3864 "firmware interface\n"); 3865 3866 tpacpi_send_radiosw_update(); 3867 hotkey_tablet_mode_notify_change(); 3868 hotkey_wakeup_reason_notify_change(); 3869 hotkey_wakeup_hotunplug_complete_notify_change(); 3870 hotkey_poll_setup_safe(false); 3871 3872 /* restore previous mode of adapive keyboard of X1 Carbon */ 3873 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3874 if ((hkeyv >> 8) == 2) { 3875 if (!acpi_evalf(hkey_handle, 3876 NULL, 3877 "STRW", "vd", 3878 adaptive_keyboard_prev_mode)) { 3879 pr_err("Cannot set adaptive keyboard mode.\n"); 3880 } 3881 } 3882 } 3883 } 3884 3885 /* procfs -------------------------------------------------------------- */ 3886 static int hotkey_read(struct seq_file *m) 3887 { 3888 int res, status; 3889 3890 if (!tp_features.hotkey) { 3891 seq_printf(m, "status:\t\tnot supported\n"); 3892 return 0; 3893 } 3894 3895 if (mutex_lock_killable(&hotkey_mutex)) 3896 return -ERESTARTSYS; 3897 res = hotkey_status_get(&status); 3898 if (!res) 3899 res = hotkey_mask_get(); 3900 mutex_unlock(&hotkey_mutex); 3901 if (res) 3902 return res; 3903 3904 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 3905 if (hotkey_all_mask) { 3906 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 3907 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 3908 } else { 3909 seq_printf(m, "mask:\t\tnot supported\n"); 3910 seq_printf(m, "commands:\tenable, disable, reset\n"); 3911 } 3912 3913 return 0; 3914 } 3915 3916 static void hotkey_enabledisable_warn(bool enable) 3917 { 3918 tpacpi_log_usertask("procfs hotkey enable/disable"); 3919 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 3920 pr_fmt("hotkey enable/disable functionality has been " 3921 "removed from the driver. " 3922 "Hotkeys are always enabled.\n"))) 3923 pr_err("Please remove the hotkey=enable module " 3924 "parameter, it is deprecated. " 3925 "Hotkeys are always enabled.\n"); 3926 } 3927 3928 static int hotkey_write(char *buf) 3929 { 3930 int res; 3931 u32 mask; 3932 char *cmd; 3933 3934 if (!tp_features.hotkey) 3935 return -ENODEV; 3936 3937 if (mutex_lock_killable(&hotkey_mutex)) 3938 return -ERESTARTSYS; 3939 3940 mask = hotkey_user_mask; 3941 3942 res = 0; 3943 while ((cmd = next_cmd(&buf))) { 3944 if (strlencmp(cmd, "enable") == 0) { 3945 hotkey_enabledisable_warn(1); 3946 } else if (strlencmp(cmd, "disable") == 0) { 3947 hotkey_enabledisable_warn(0); 3948 res = -EPERM; 3949 } else if (strlencmp(cmd, "reset") == 0) { 3950 mask = (hotkey_all_mask | hotkey_source_mask) 3951 & ~hotkey_reserved_mask; 3952 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 3953 /* mask set */ 3954 } else if (sscanf(cmd, "%x", &mask) == 1) { 3955 /* mask set */ 3956 } else { 3957 res = -EINVAL; 3958 goto errexit; 3959 } 3960 } 3961 3962 if (!res) { 3963 tpacpi_disclose_usertask("procfs hotkey", 3964 "set mask to 0x%08x\n", mask); 3965 res = hotkey_user_mask_set(mask); 3966 } 3967 3968 errexit: 3969 mutex_unlock(&hotkey_mutex); 3970 return res; 3971 } 3972 3973 static const struct acpi_device_id ibm_htk_device_ids[] = { 3974 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 3975 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 3976 {"", 0}, 3977 }; 3978 3979 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 3980 .hid = ibm_htk_device_ids, 3981 .notify = hotkey_notify, 3982 .handle = &hkey_handle, 3983 .type = ACPI_DEVICE_NOTIFY, 3984 }; 3985 3986 static struct ibm_struct hotkey_driver_data = { 3987 .name = "hotkey", 3988 .read = hotkey_read, 3989 .write = hotkey_write, 3990 .exit = hotkey_exit, 3991 .resume = hotkey_resume, 3992 .suspend = hotkey_suspend, 3993 .acpi = &ibm_hotkey_acpidriver, 3994 }; 3995 3996 /************************************************************************* 3997 * Bluetooth subdriver 3998 */ 3999 4000 enum { 4001 /* ACPI GBDC/SBDC bits */ 4002 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4003 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4004 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4005 0 = disable, 1 = enable */ 4006 }; 4007 4008 enum { 4009 /* ACPI \BLTH commands */ 4010 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4011 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4012 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4013 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4014 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4015 }; 4016 4017 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4018 4019 static int bluetooth_get_status(void) 4020 { 4021 int status; 4022 4023 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4024 if (dbg_bluetoothemul) 4025 return (tpacpi_bluetooth_emulstate) ? 4026 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4027 #endif 4028 4029 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4030 return -EIO; 4031 4032 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4033 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4034 } 4035 4036 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4037 { 4038 int status; 4039 4040 vdbg_printk(TPACPI_DBG_RFKILL, 4041 "will attempt to %s bluetooth\n", 4042 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4043 4044 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4045 if (dbg_bluetoothemul) { 4046 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4047 return 0; 4048 } 4049 #endif 4050 4051 if (state == TPACPI_RFK_RADIO_ON) 4052 status = TP_ACPI_BLUETOOTH_RADIOSSW 4053 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4054 else 4055 status = 0; 4056 4057 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4058 return -EIO; 4059 4060 return 0; 4061 } 4062 4063 /* sysfs bluetooth enable ---------------------------------------------- */ 4064 static ssize_t bluetooth_enable_show(struct device *dev, 4065 struct device_attribute *attr, 4066 char *buf) 4067 { 4068 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4069 attr, buf); 4070 } 4071 4072 static ssize_t bluetooth_enable_store(struct device *dev, 4073 struct device_attribute *attr, 4074 const char *buf, size_t count) 4075 { 4076 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4077 attr, buf, count); 4078 } 4079 4080 static struct device_attribute dev_attr_bluetooth_enable = 4081 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO, 4082 bluetooth_enable_show, bluetooth_enable_store); 4083 4084 /* --------------------------------------------------------------------- */ 4085 4086 static struct attribute *bluetooth_attributes[] = { 4087 &dev_attr_bluetooth_enable.attr, 4088 NULL 4089 }; 4090 4091 static const struct attribute_group bluetooth_attr_group = { 4092 .attrs = bluetooth_attributes, 4093 }; 4094 4095 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4096 .get_status = bluetooth_get_status, 4097 .set_status = bluetooth_set_status, 4098 }; 4099 4100 static void bluetooth_shutdown(void) 4101 { 4102 /* Order firmware to save current state to NVRAM */ 4103 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4104 TP_ACPI_BLTH_SAVE_STATE)) 4105 pr_notice("failed to save bluetooth state to NVRAM\n"); 4106 else 4107 vdbg_printk(TPACPI_DBG_RFKILL, 4108 "bluetooth state saved to NVRAM\n"); 4109 } 4110 4111 static void bluetooth_exit(void) 4112 { 4113 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4114 &bluetooth_attr_group); 4115 4116 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4117 4118 bluetooth_shutdown(); 4119 } 4120 4121 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4122 { 4123 int res; 4124 int status = 0; 4125 4126 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4127 "initializing bluetooth subdriver\n"); 4128 4129 TPACPI_ACPIHANDLE_INIT(hkey); 4130 4131 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4132 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4133 tp_features.bluetooth = hkey_handle && 4134 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4135 4136 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4137 "bluetooth is %s, status 0x%02x\n", 4138 str_supported(tp_features.bluetooth), 4139 status); 4140 4141 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4142 if (dbg_bluetoothemul) { 4143 tp_features.bluetooth = 1; 4144 pr_info("bluetooth switch emulation enabled\n"); 4145 } else 4146 #endif 4147 if (tp_features.bluetooth && 4148 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4149 /* no bluetooth hardware present in system */ 4150 tp_features.bluetooth = 0; 4151 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4152 "bluetooth hardware not installed\n"); 4153 } 4154 4155 if (!tp_features.bluetooth) 4156 return 1; 4157 4158 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4159 &bluetooth_tprfk_ops, 4160 RFKILL_TYPE_BLUETOOTH, 4161 TPACPI_RFK_BLUETOOTH_SW_NAME, 4162 true); 4163 if (res) 4164 return res; 4165 4166 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4167 &bluetooth_attr_group); 4168 if (res) { 4169 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4170 return res; 4171 } 4172 4173 return 0; 4174 } 4175 4176 /* procfs -------------------------------------------------------------- */ 4177 static int bluetooth_read(struct seq_file *m) 4178 { 4179 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4180 } 4181 4182 static int bluetooth_write(char *buf) 4183 { 4184 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4185 } 4186 4187 static struct ibm_struct bluetooth_driver_data = { 4188 .name = "bluetooth", 4189 .read = bluetooth_read, 4190 .write = bluetooth_write, 4191 .exit = bluetooth_exit, 4192 .shutdown = bluetooth_shutdown, 4193 }; 4194 4195 /************************************************************************* 4196 * Wan subdriver 4197 */ 4198 4199 enum { 4200 /* ACPI GWAN/SWAN bits */ 4201 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4202 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4203 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4204 0 = disable, 1 = enable */ 4205 }; 4206 4207 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4208 4209 static int wan_get_status(void) 4210 { 4211 int status; 4212 4213 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4214 if (dbg_wwanemul) 4215 return (tpacpi_wwan_emulstate) ? 4216 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4217 #endif 4218 4219 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4220 return -EIO; 4221 4222 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4223 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4224 } 4225 4226 static int wan_set_status(enum tpacpi_rfkill_state state) 4227 { 4228 int status; 4229 4230 vdbg_printk(TPACPI_DBG_RFKILL, 4231 "will attempt to %s wwan\n", 4232 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4233 4234 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4235 if (dbg_wwanemul) { 4236 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4237 return 0; 4238 } 4239 #endif 4240 4241 if (state == TPACPI_RFK_RADIO_ON) 4242 status = TP_ACPI_WANCARD_RADIOSSW 4243 | TP_ACPI_WANCARD_RESUMECTRL; 4244 else 4245 status = 0; 4246 4247 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4248 return -EIO; 4249 4250 return 0; 4251 } 4252 4253 /* sysfs wan enable ---------------------------------------------------- */ 4254 static ssize_t wan_enable_show(struct device *dev, 4255 struct device_attribute *attr, 4256 char *buf) 4257 { 4258 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4259 attr, buf); 4260 } 4261 4262 static ssize_t wan_enable_store(struct device *dev, 4263 struct device_attribute *attr, 4264 const char *buf, size_t count) 4265 { 4266 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4267 attr, buf, count); 4268 } 4269 4270 static struct device_attribute dev_attr_wan_enable = 4271 __ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4272 wan_enable_show, wan_enable_store); 4273 4274 /* --------------------------------------------------------------------- */ 4275 4276 static struct attribute *wan_attributes[] = { 4277 &dev_attr_wan_enable.attr, 4278 NULL 4279 }; 4280 4281 static const struct attribute_group wan_attr_group = { 4282 .attrs = wan_attributes, 4283 }; 4284 4285 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4286 .get_status = wan_get_status, 4287 .set_status = wan_set_status, 4288 }; 4289 4290 static void wan_shutdown(void) 4291 { 4292 /* Order firmware to save current state to NVRAM */ 4293 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4294 TP_ACPI_WGSV_SAVE_STATE)) 4295 pr_notice("failed to save WWAN state to NVRAM\n"); 4296 else 4297 vdbg_printk(TPACPI_DBG_RFKILL, 4298 "WWAN state saved to NVRAM\n"); 4299 } 4300 4301 static void wan_exit(void) 4302 { 4303 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4304 &wan_attr_group); 4305 4306 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4307 4308 wan_shutdown(); 4309 } 4310 4311 static int __init wan_init(struct ibm_init_struct *iibm) 4312 { 4313 int res; 4314 int status = 0; 4315 4316 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4317 "initializing wan subdriver\n"); 4318 4319 TPACPI_ACPIHANDLE_INIT(hkey); 4320 4321 tp_features.wan = hkey_handle && 4322 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4323 4324 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4325 "wan is %s, status 0x%02x\n", 4326 str_supported(tp_features.wan), 4327 status); 4328 4329 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4330 if (dbg_wwanemul) { 4331 tp_features.wan = 1; 4332 pr_info("wwan switch emulation enabled\n"); 4333 } else 4334 #endif 4335 if (tp_features.wan && 4336 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4337 /* no wan hardware present in system */ 4338 tp_features.wan = 0; 4339 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4340 "wan hardware not installed\n"); 4341 } 4342 4343 if (!tp_features.wan) 4344 return 1; 4345 4346 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4347 &wan_tprfk_ops, 4348 RFKILL_TYPE_WWAN, 4349 TPACPI_RFK_WWAN_SW_NAME, 4350 true); 4351 if (res) 4352 return res; 4353 4354 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4355 &wan_attr_group); 4356 4357 if (res) { 4358 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4359 return res; 4360 } 4361 4362 return 0; 4363 } 4364 4365 /* procfs -------------------------------------------------------------- */ 4366 static int wan_read(struct seq_file *m) 4367 { 4368 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4369 } 4370 4371 static int wan_write(char *buf) 4372 { 4373 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4374 } 4375 4376 static struct ibm_struct wan_driver_data = { 4377 .name = "wan", 4378 .read = wan_read, 4379 .write = wan_write, 4380 .exit = wan_exit, 4381 .shutdown = wan_shutdown, 4382 }; 4383 4384 /************************************************************************* 4385 * UWB subdriver 4386 */ 4387 4388 enum { 4389 /* ACPI GUWB/SUWB bits */ 4390 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4391 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4392 }; 4393 4394 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4395 4396 static int uwb_get_status(void) 4397 { 4398 int status; 4399 4400 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4401 if (dbg_uwbemul) 4402 return (tpacpi_uwb_emulstate) ? 4403 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4404 #endif 4405 4406 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4407 return -EIO; 4408 4409 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4410 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4411 } 4412 4413 static int uwb_set_status(enum tpacpi_rfkill_state state) 4414 { 4415 int status; 4416 4417 vdbg_printk(TPACPI_DBG_RFKILL, 4418 "will attempt to %s UWB\n", 4419 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4420 4421 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4422 if (dbg_uwbemul) { 4423 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4424 return 0; 4425 } 4426 #endif 4427 4428 if (state == TPACPI_RFK_RADIO_ON) 4429 status = TP_ACPI_UWB_RADIOSSW; 4430 else 4431 status = 0; 4432 4433 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4434 return -EIO; 4435 4436 return 0; 4437 } 4438 4439 /* --------------------------------------------------------------------- */ 4440 4441 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4442 .get_status = uwb_get_status, 4443 .set_status = uwb_set_status, 4444 }; 4445 4446 static void uwb_exit(void) 4447 { 4448 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4449 } 4450 4451 static int __init uwb_init(struct ibm_init_struct *iibm) 4452 { 4453 int res; 4454 int status = 0; 4455 4456 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4457 "initializing uwb subdriver\n"); 4458 4459 TPACPI_ACPIHANDLE_INIT(hkey); 4460 4461 tp_features.uwb = hkey_handle && 4462 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4463 4464 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4465 "uwb is %s, status 0x%02x\n", 4466 str_supported(tp_features.uwb), 4467 status); 4468 4469 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4470 if (dbg_uwbemul) { 4471 tp_features.uwb = 1; 4472 pr_info("uwb switch emulation enabled\n"); 4473 } else 4474 #endif 4475 if (tp_features.uwb && 4476 !(status & TP_ACPI_UWB_HWPRESENT)) { 4477 /* no uwb hardware present in system */ 4478 tp_features.uwb = 0; 4479 dbg_printk(TPACPI_DBG_INIT, 4480 "uwb hardware not installed\n"); 4481 } 4482 4483 if (!tp_features.uwb) 4484 return 1; 4485 4486 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4487 &uwb_tprfk_ops, 4488 RFKILL_TYPE_UWB, 4489 TPACPI_RFK_UWB_SW_NAME, 4490 false); 4491 return res; 4492 } 4493 4494 static struct ibm_struct uwb_driver_data = { 4495 .name = "uwb", 4496 .exit = uwb_exit, 4497 .flags.experimental = 1, 4498 }; 4499 4500 /************************************************************************* 4501 * Video subdriver 4502 */ 4503 4504 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4505 4506 enum video_access_mode { 4507 TPACPI_VIDEO_NONE = 0, 4508 TPACPI_VIDEO_570, /* 570 */ 4509 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4510 TPACPI_VIDEO_NEW, /* all others */ 4511 }; 4512 4513 enum { /* video status flags, based on VIDEO_570 */ 4514 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4515 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4516 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4517 }; 4518 4519 enum { /* TPACPI_VIDEO_570 constants */ 4520 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4521 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4522 * video_status_flags */ 4523 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4524 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4525 }; 4526 4527 static enum video_access_mode video_supported; 4528 static int video_orig_autosw; 4529 4530 static int video_autosw_get(void); 4531 static int video_autosw_set(int enable); 4532 4533 TPACPI_HANDLE(vid, root, 4534 "\\_SB.PCI.AGP.VGA", /* 570 */ 4535 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4536 "\\_SB.PCI0.VID0", /* 770e */ 4537 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4538 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4539 "\\_SB.PCI0.AGP.VID", /* all others */ 4540 ); /* R30, R31 */ 4541 4542 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4543 4544 static int __init video_init(struct ibm_init_struct *iibm) 4545 { 4546 int ivga; 4547 4548 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4549 4550 TPACPI_ACPIHANDLE_INIT(vid); 4551 if (tpacpi_is_ibm()) 4552 TPACPI_ACPIHANDLE_INIT(vid2); 4553 4554 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4555 /* G41, assume IVGA doesn't change */ 4556 vid_handle = vid2_handle; 4557 4558 if (!vid_handle) 4559 /* video switching not supported on R30, R31 */ 4560 video_supported = TPACPI_VIDEO_NONE; 4561 else if (tpacpi_is_ibm() && 4562 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4563 /* 570 */ 4564 video_supported = TPACPI_VIDEO_570; 4565 else if (tpacpi_is_ibm() && 4566 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4567 /* 600e/x, 770e, 770x */ 4568 video_supported = TPACPI_VIDEO_770; 4569 else 4570 /* all others */ 4571 video_supported = TPACPI_VIDEO_NEW; 4572 4573 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4574 str_supported(video_supported != TPACPI_VIDEO_NONE), 4575 video_supported); 4576 4577 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1; 4578 } 4579 4580 static void video_exit(void) 4581 { 4582 dbg_printk(TPACPI_DBG_EXIT, 4583 "restoring original video autoswitch mode\n"); 4584 if (video_autosw_set(video_orig_autosw)) 4585 pr_err("error while trying to restore original " 4586 "video autoswitch mode\n"); 4587 } 4588 4589 static int video_outputsw_get(void) 4590 { 4591 int status = 0; 4592 int i; 4593 4594 switch (video_supported) { 4595 case TPACPI_VIDEO_570: 4596 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4597 TP_ACPI_VIDEO_570_PHSCMD)) 4598 return -EIO; 4599 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4600 break; 4601 case TPACPI_VIDEO_770: 4602 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4603 return -EIO; 4604 if (i) 4605 status |= TP_ACPI_VIDEO_S_LCD; 4606 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4607 return -EIO; 4608 if (i) 4609 status |= TP_ACPI_VIDEO_S_CRT; 4610 break; 4611 case TPACPI_VIDEO_NEW: 4612 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4613 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4614 return -EIO; 4615 if (i) 4616 status |= TP_ACPI_VIDEO_S_CRT; 4617 4618 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4619 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4620 return -EIO; 4621 if (i) 4622 status |= TP_ACPI_VIDEO_S_LCD; 4623 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4624 return -EIO; 4625 if (i) 4626 status |= TP_ACPI_VIDEO_S_DVI; 4627 break; 4628 default: 4629 return -ENOSYS; 4630 } 4631 4632 return status; 4633 } 4634 4635 static int video_outputsw_set(int status) 4636 { 4637 int autosw; 4638 int res = 0; 4639 4640 switch (video_supported) { 4641 case TPACPI_VIDEO_570: 4642 res = acpi_evalf(NULL, NULL, 4643 "\\_SB.PHS2", "vdd", 4644 TP_ACPI_VIDEO_570_PHS2CMD, 4645 status | TP_ACPI_VIDEO_570_PHS2SET); 4646 break; 4647 case TPACPI_VIDEO_770: 4648 autosw = video_autosw_get(); 4649 if (autosw < 0) 4650 return autosw; 4651 4652 res = video_autosw_set(1); 4653 if (res) 4654 return res; 4655 res = acpi_evalf(vid_handle, NULL, 4656 "ASWT", "vdd", status * 0x100, 0); 4657 if (!autosw && video_autosw_set(autosw)) { 4658 pr_err("video auto-switch left enabled due to error\n"); 4659 return -EIO; 4660 } 4661 break; 4662 case TPACPI_VIDEO_NEW: 4663 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4664 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4665 break; 4666 default: 4667 return -ENOSYS; 4668 } 4669 4670 return (res)? 0 : -EIO; 4671 } 4672 4673 static int video_autosw_get(void) 4674 { 4675 int autosw = 0; 4676 4677 switch (video_supported) { 4678 case TPACPI_VIDEO_570: 4679 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4680 return -EIO; 4681 break; 4682 case TPACPI_VIDEO_770: 4683 case TPACPI_VIDEO_NEW: 4684 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4685 return -EIO; 4686 break; 4687 default: 4688 return -ENOSYS; 4689 } 4690 4691 return autosw & 1; 4692 } 4693 4694 static int video_autosw_set(int enable) 4695 { 4696 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0)) 4697 return -EIO; 4698 return 0; 4699 } 4700 4701 static int video_outputsw_cycle(void) 4702 { 4703 int autosw = video_autosw_get(); 4704 int res; 4705 4706 if (autosw < 0) 4707 return autosw; 4708 4709 switch (video_supported) { 4710 case TPACPI_VIDEO_570: 4711 res = video_autosw_set(1); 4712 if (res) 4713 return res; 4714 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4715 break; 4716 case TPACPI_VIDEO_770: 4717 case TPACPI_VIDEO_NEW: 4718 res = video_autosw_set(1); 4719 if (res) 4720 return res; 4721 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4722 break; 4723 default: 4724 return -ENOSYS; 4725 } 4726 if (!autosw && video_autosw_set(autosw)) { 4727 pr_err("video auto-switch left enabled due to error\n"); 4728 return -EIO; 4729 } 4730 4731 return (res)? 0 : -EIO; 4732 } 4733 4734 static int video_expand_toggle(void) 4735 { 4736 switch (video_supported) { 4737 case TPACPI_VIDEO_570: 4738 return acpi_evalf(ec_handle, NULL, "_Q17", "v")? 4739 0 : -EIO; 4740 case TPACPI_VIDEO_770: 4741 return acpi_evalf(vid_handle, NULL, "VEXP", "v")? 4742 0 : -EIO; 4743 case TPACPI_VIDEO_NEW: 4744 return acpi_evalf(NULL, NULL, "\\VEXP", "v")? 4745 0 : -EIO; 4746 default: 4747 return -ENOSYS; 4748 } 4749 /* not reached */ 4750 } 4751 4752 static int video_read(struct seq_file *m) 4753 { 4754 int status, autosw; 4755 4756 if (video_supported == TPACPI_VIDEO_NONE) { 4757 seq_printf(m, "status:\t\tnot supported\n"); 4758 return 0; 4759 } 4760 4761 /* Even reads can crash X.org, so... */ 4762 if (!capable(CAP_SYS_ADMIN)) 4763 return -EPERM; 4764 4765 status = video_outputsw_get(); 4766 if (status < 0) 4767 return status; 4768 4769 autosw = video_autosw_get(); 4770 if (autosw < 0) 4771 return autosw; 4772 4773 seq_printf(m, "status:\t\tsupported\n"); 4774 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4775 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4776 if (video_supported == TPACPI_VIDEO_NEW) 4777 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 4778 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 4779 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 4780 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 4781 if (video_supported == TPACPI_VIDEO_NEW) 4782 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 4783 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 4784 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 4785 4786 return 0; 4787 } 4788 4789 static int video_write(char *buf) 4790 { 4791 char *cmd; 4792 int enable, disable, status; 4793 int res; 4794 4795 if (video_supported == TPACPI_VIDEO_NONE) 4796 return -ENODEV; 4797 4798 /* Even reads can crash X.org, let alone writes... */ 4799 if (!capable(CAP_SYS_ADMIN)) 4800 return -EPERM; 4801 4802 enable = 0; 4803 disable = 0; 4804 4805 while ((cmd = next_cmd(&buf))) { 4806 if (strlencmp(cmd, "lcd_enable") == 0) { 4807 enable |= TP_ACPI_VIDEO_S_LCD; 4808 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4809 disable |= TP_ACPI_VIDEO_S_LCD; 4810 } else if (strlencmp(cmd, "crt_enable") == 0) { 4811 enable |= TP_ACPI_VIDEO_S_CRT; 4812 } else if (strlencmp(cmd, "crt_disable") == 0) { 4813 disable |= TP_ACPI_VIDEO_S_CRT; 4814 } else if (video_supported == TPACPI_VIDEO_NEW && 4815 strlencmp(cmd, "dvi_enable") == 0) { 4816 enable |= TP_ACPI_VIDEO_S_DVI; 4817 } else if (video_supported == TPACPI_VIDEO_NEW && 4818 strlencmp(cmd, "dvi_disable") == 0) { 4819 disable |= TP_ACPI_VIDEO_S_DVI; 4820 } else if (strlencmp(cmd, "auto_enable") == 0) { 4821 res = video_autosw_set(1); 4822 if (res) 4823 return res; 4824 } else if (strlencmp(cmd, "auto_disable") == 0) { 4825 res = video_autosw_set(0); 4826 if (res) 4827 return res; 4828 } else if (strlencmp(cmd, "video_switch") == 0) { 4829 res = video_outputsw_cycle(); 4830 if (res) 4831 return res; 4832 } else if (strlencmp(cmd, "expand_toggle") == 0) { 4833 res = video_expand_toggle(); 4834 if (res) 4835 return res; 4836 } else 4837 return -EINVAL; 4838 } 4839 4840 if (enable || disable) { 4841 status = video_outputsw_get(); 4842 if (status < 0) 4843 return status; 4844 res = video_outputsw_set((status & ~disable) | enable); 4845 if (res) 4846 return res; 4847 } 4848 4849 return 0; 4850 } 4851 4852 static struct ibm_struct video_driver_data = { 4853 .name = "video", 4854 .read = video_read, 4855 .write = video_write, 4856 .exit = video_exit, 4857 }; 4858 4859 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 4860 4861 /************************************************************************* 4862 * Light (thinklight) subdriver 4863 */ 4864 4865 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 4866 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 4867 4868 static int light_get_status(void) 4869 { 4870 int status = 0; 4871 4872 if (tp_features.light_status) { 4873 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 4874 return -EIO; 4875 return (!!status); 4876 } 4877 4878 return -ENXIO; 4879 } 4880 4881 static int light_set_status(int status) 4882 { 4883 int rc; 4884 4885 if (tp_features.light) { 4886 if (cmos_handle) { 4887 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 4888 (status)? 4889 TP_CMOS_THINKLIGHT_ON : 4890 TP_CMOS_THINKLIGHT_OFF); 4891 } else { 4892 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 4893 (status)? 1 : 0); 4894 } 4895 return (rc)? 0 : -EIO; 4896 } 4897 4898 return -ENXIO; 4899 } 4900 4901 static void light_set_status_worker(struct work_struct *work) 4902 { 4903 struct tpacpi_led_classdev *data = 4904 container_of(work, struct tpacpi_led_classdev, work); 4905 4906 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 4907 light_set_status((data->new_state != TPACPI_LED_OFF)); 4908 } 4909 4910 static void light_sysfs_set(struct led_classdev *led_cdev, 4911 enum led_brightness brightness) 4912 { 4913 struct tpacpi_led_classdev *data = 4914 container_of(led_cdev, 4915 struct tpacpi_led_classdev, 4916 led_classdev); 4917 data->new_state = (brightness != LED_OFF) ? 4918 TPACPI_LED_ON : TPACPI_LED_OFF; 4919 queue_work(tpacpi_wq, &data->work); 4920 } 4921 4922 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 4923 { 4924 return (light_get_status() == 1)? LED_FULL : LED_OFF; 4925 } 4926 4927 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 4928 .led_classdev = { 4929 .name = "tpacpi::thinklight", 4930 .brightness_set = &light_sysfs_set, 4931 .brightness_get = &light_sysfs_get, 4932 } 4933 }; 4934 4935 static int __init light_init(struct ibm_init_struct *iibm) 4936 { 4937 int rc; 4938 4939 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 4940 4941 if (tpacpi_is_ibm()) { 4942 TPACPI_ACPIHANDLE_INIT(ledb); 4943 TPACPI_ACPIHANDLE_INIT(lght); 4944 } 4945 TPACPI_ACPIHANDLE_INIT(cmos); 4946 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 4947 4948 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 4949 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 4950 4951 if (tp_features.light) 4952 /* light status not supported on 4953 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 4954 tp_features.light_status = 4955 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 4956 4957 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 4958 str_supported(tp_features.light), 4959 str_supported(tp_features.light_status)); 4960 4961 if (!tp_features.light) 4962 return 1; 4963 4964 rc = led_classdev_register(&tpacpi_pdev->dev, 4965 &tpacpi_led_thinklight.led_classdev); 4966 4967 if (rc < 0) { 4968 tp_features.light = 0; 4969 tp_features.light_status = 0; 4970 } else { 4971 rc = 0; 4972 } 4973 4974 return rc; 4975 } 4976 4977 static void light_exit(void) 4978 { 4979 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 4980 flush_workqueue(tpacpi_wq); 4981 } 4982 4983 static int light_read(struct seq_file *m) 4984 { 4985 int status; 4986 4987 if (!tp_features.light) { 4988 seq_printf(m, "status:\t\tnot supported\n"); 4989 } else if (!tp_features.light_status) { 4990 seq_printf(m, "status:\t\tunknown\n"); 4991 seq_printf(m, "commands:\ton, off\n"); 4992 } else { 4993 status = light_get_status(); 4994 if (status < 0) 4995 return status; 4996 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 4997 seq_printf(m, "commands:\ton, off\n"); 4998 } 4999 5000 return 0; 5001 } 5002 5003 static int light_write(char *buf) 5004 { 5005 char *cmd; 5006 int newstatus = 0; 5007 5008 if (!tp_features.light) 5009 return -ENODEV; 5010 5011 while ((cmd = next_cmd(&buf))) { 5012 if (strlencmp(cmd, "on") == 0) { 5013 newstatus = 1; 5014 } else if (strlencmp(cmd, "off") == 0) { 5015 newstatus = 0; 5016 } else 5017 return -EINVAL; 5018 } 5019 5020 return light_set_status(newstatus); 5021 } 5022 5023 static struct ibm_struct light_driver_data = { 5024 .name = "light", 5025 .read = light_read, 5026 .write = light_write, 5027 .exit = light_exit, 5028 }; 5029 5030 /************************************************************************* 5031 * CMOS subdriver 5032 */ 5033 5034 /* sysfs cmos_command -------------------------------------------------- */ 5035 static ssize_t cmos_command_store(struct device *dev, 5036 struct device_attribute *attr, 5037 const char *buf, size_t count) 5038 { 5039 unsigned long cmos_cmd; 5040 int res; 5041 5042 if (parse_strtoul(buf, 21, &cmos_cmd)) 5043 return -EINVAL; 5044 5045 res = issue_thinkpad_cmos_command(cmos_cmd); 5046 return (res)? res : count; 5047 } 5048 5049 static struct device_attribute dev_attr_cmos_command = 5050 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store); 5051 5052 /* --------------------------------------------------------------------- */ 5053 5054 static int __init cmos_init(struct ibm_init_struct *iibm) 5055 { 5056 int res; 5057 5058 vdbg_printk(TPACPI_DBG_INIT, 5059 "initializing cmos commands subdriver\n"); 5060 5061 TPACPI_ACPIHANDLE_INIT(cmos); 5062 5063 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5064 str_supported(cmos_handle != NULL)); 5065 5066 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5067 if (res) 5068 return res; 5069 5070 return (cmos_handle)? 0 : 1; 5071 } 5072 5073 static void cmos_exit(void) 5074 { 5075 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5076 } 5077 5078 static int cmos_read(struct seq_file *m) 5079 { 5080 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5081 R30, R31, T20-22, X20-21 */ 5082 if (!cmos_handle) 5083 seq_printf(m, "status:\t\tnot supported\n"); 5084 else { 5085 seq_printf(m, "status:\t\tsupported\n"); 5086 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5087 } 5088 5089 return 0; 5090 } 5091 5092 static int cmos_write(char *buf) 5093 { 5094 char *cmd; 5095 int cmos_cmd, res; 5096 5097 while ((cmd = next_cmd(&buf))) { 5098 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5099 cmos_cmd >= 0 && cmos_cmd <= 21) { 5100 /* cmos_cmd set */ 5101 } else 5102 return -EINVAL; 5103 5104 res = issue_thinkpad_cmos_command(cmos_cmd); 5105 if (res) 5106 return res; 5107 } 5108 5109 return 0; 5110 } 5111 5112 static struct ibm_struct cmos_driver_data = { 5113 .name = "cmos", 5114 .read = cmos_read, 5115 .write = cmos_write, 5116 .exit = cmos_exit, 5117 }; 5118 5119 /************************************************************************* 5120 * LED subdriver 5121 */ 5122 5123 enum led_access_mode { 5124 TPACPI_LED_NONE = 0, 5125 TPACPI_LED_570, /* 570 */ 5126 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5127 TPACPI_LED_NEW, /* all others */ 5128 }; 5129 5130 enum { /* For TPACPI_LED_OLD */ 5131 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5132 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5133 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5134 }; 5135 5136 static enum led_access_mode led_supported; 5137 5138 static acpi_handle led_handle; 5139 5140 #define TPACPI_LED_NUMLEDS 16 5141 static struct tpacpi_led_classdev *tpacpi_leds; 5142 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5143 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5144 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5145 "tpacpi::power", 5146 "tpacpi:orange:batt", 5147 "tpacpi:green:batt", 5148 "tpacpi::dock_active", 5149 "tpacpi::bay_active", 5150 "tpacpi::dock_batt", 5151 "tpacpi::unknown_led", 5152 "tpacpi::standby", 5153 "tpacpi::dock_status1", 5154 "tpacpi::dock_status2", 5155 "tpacpi::unknown_led2", 5156 "tpacpi::unknown_led3", 5157 "tpacpi::thinkvantage", 5158 }; 5159 #define TPACPI_SAFE_LEDS 0x1081U 5160 5161 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5162 { 5163 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5164 return false; 5165 #else 5166 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5167 #endif 5168 } 5169 5170 static int led_get_status(const unsigned int led) 5171 { 5172 int status; 5173 enum led_status_t led_s; 5174 5175 switch (led_supported) { 5176 case TPACPI_LED_570: 5177 if (!acpi_evalf(ec_handle, 5178 &status, "GLED", "dd", 1 << led)) 5179 return -EIO; 5180 led_s = (status == 0)? 5181 TPACPI_LED_OFF : 5182 ((status == 1)? 5183 TPACPI_LED_ON : 5184 TPACPI_LED_BLINK); 5185 tpacpi_led_state_cache[led] = led_s; 5186 return led_s; 5187 default: 5188 return -ENXIO; 5189 } 5190 5191 /* not reached */ 5192 } 5193 5194 static int led_set_status(const unsigned int led, 5195 const enum led_status_t ledstatus) 5196 { 5197 /* off, on, blink. Index is led_status_t */ 5198 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5199 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5200 5201 int rc = 0; 5202 5203 switch (led_supported) { 5204 case TPACPI_LED_570: 5205 /* 570 */ 5206 if (unlikely(led > 7)) 5207 return -EINVAL; 5208 if (unlikely(tpacpi_is_led_restricted(led))) 5209 return -EPERM; 5210 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5211 (1 << led), led_sled_arg1[ledstatus])) 5212 rc = -EIO; 5213 break; 5214 case TPACPI_LED_OLD: 5215 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5216 if (unlikely(led > 7)) 5217 return -EINVAL; 5218 if (unlikely(tpacpi_is_led_restricted(led))) 5219 return -EPERM; 5220 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5221 if (rc >= 0) 5222 rc = ec_write(TPACPI_LED_EC_HLBL, 5223 (ledstatus == TPACPI_LED_BLINK) << led); 5224 if (rc >= 0) 5225 rc = ec_write(TPACPI_LED_EC_HLCL, 5226 (ledstatus != TPACPI_LED_OFF) << led); 5227 break; 5228 case TPACPI_LED_NEW: 5229 /* all others */ 5230 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5231 return -EINVAL; 5232 if (unlikely(tpacpi_is_led_restricted(led))) 5233 return -EPERM; 5234 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5235 led, led_led_arg1[ledstatus])) 5236 rc = -EIO; 5237 break; 5238 default: 5239 rc = -ENXIO; 5240 } 5241 5242 if (!rc) 5243 tpacpi_led_state_cache[led] = ledstatus; 5244 5245 return rc; 5246 } 5247 5248 static void led_set_status_worker(struct work_struct *work) 5249 { 5250 struct tpacpi_led_classdev *data = 5251 container_of(work, struct tpacpi_led_classdev, work); 5252 5253 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5254 led_set_status(data->led, data->new_state); 5255 } 5256 5257 static void led_sysfs_set(struct led_classdev *led_cdev, 5258 enum led_brightness brightness) 5259 { 5260 struct tpacpi_led_classdev *data = container_of(led_cdev, 5261 struct tpacpi_led_classdev, led_classdev); 5262 5263 if (brightness == LED_OFF) 5264 data->new_state = TPACPI_LED_OFF; 5265 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5266 data->new_state = TPACPI_LED_ON; 5267 else 5268 data->new_state = TPACPI_LED_BLINK; 5269 5270 queue_work(tpacpi_wq, &data->work); 5271 } 5272 5273 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5274 unsigned long *delay_on, unsigned long *delay_off) 5275 { 5276 struct tpacpi_led_classdev *data = container_of(led_cdev, 5277 struct tpacpi_led_classdev, led_classdev); 5278 5279 /* Can we choose the flash rate? */ 5280 if (*delay_on == 0 && *delay_off == 0) { 5281 /* yes. set them to the hardware blink rate (1 Hz) */ 5282 *delay_on = 500; /* ms */ 5283 *delay_off = 500; /* ms */ 5284 } else if ((*delay_on != 500) || (*delay_off != 500)) 5285 return -EINVAL; 5286 5287 data->new_state = TPACPI_LED_BLINK; 5288 queue_work(tpacpi_wq, &data->work); 5289 5290 return 0; 5291 } 5292 5293 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5294 { 5295 int rc; 5296 5297 struct tpacpi_led_classdev *data = container_of(led_cdev, 5298 struct tpacpi_led_classdev, led_classdev); 5299 5300 rc = led_get_status(data->led); 5301 5302 if (rc == TPACPI_LED_OFF || rc < 0) 5303 rc = LED_OFF; /* no error handling in led class :( */ 5304 else 5305 rc = LED_FULL; 5306 5307 return rc; 5308 } 5309 5310 static void led_exit(void) 5311 { 5312 unsigned int i; 5313 5314 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5315 if (tpacpi_leds[i].led_classdev.name) 5316 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5317 } 5318 5319 flush_workqueue(tpacpi_wq); 5320 kfree(tpacpi_leds); 5321 } 5322 5323 static int __init tpacpi_init_led(unsigned int led) 5324 { 5325 int rc; 5326 5327 tpacpi_leds[led].led = led; 5328 5329 /* LEDs with no name don't get registered */ 5330 if (!tpacpi_led_names[led]) 5331 return 0; 5332 5333 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5334 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5335 if (led_supported == TPACPI_LED_570) 5336 tpacpi_leds[led].led_classdev.brightness_get = 5337 &led_sysfs_get; 5338 5339 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5340 5341 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5342 5343 rc = led_classdev_register(&tpacpi_pdev->dev, 5344 &tpacpi_leds[led].led_classdev); 5345 if (rc < 0) 5346 tpacpi_leds[led].led_classdev.name = NULL; 5347 5348 return rc; 5349 } 5350 5351 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5352 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5353 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5354 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5355 5356 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5357 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5358 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5359 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5360 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5361 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5362 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5363 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5364 5365 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5366 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5367 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5368 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5369 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5370 5371 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5372 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5373 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5374 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5375 5376 /* (1) - may have excess leds enabled on MSB */ 5377 5378 /* Defaults (order matters, keep last, don't reorder!) */ 5379 { /* Lenovo */ 5380 .vendor = PCI_VENDOR_ID_LENOVO, 5381 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5382 .quirks = 0x1fffU, 5383 }, 5384 { /* IBM ThinkPads with no EC version string */ 5385 .vendor = PCI_VENDOR_ID_IBM, 5386 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5387 .quirks = 0x00ffU, 5388 }, 5389 { /* IBM ThinkPads with EC version string */ 5390 .vendor = PCI_VENDOR_ID_IBM, 5391 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5392 .quirks = 0x00bfU, 5393 }, 5394 }; 5395 5396 #undef TPACPI_LEDQ_IBM 5397 #undef TPACPI_LEDQ_LNV 5398 5399 static enum led_access_mode __init led_init_detect_mode(void) 5400 { 5401 acpi_status status; 5402 5403 if (tpacpi_is_ibm()) { 5404 /* 570 */ 5405 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5406 if (ACPI_SUCCESS(status)) 5407 return TPACPI_LED_570; 5408 5409 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5410 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5411 if (ACPI_SUCCESS(status)) 5412 return TPACPI_LED_OLD; 5413 } 5414 5415 /* most others */ 5416 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5417 if (ACPI_SUCCESS(status)) 5418 return TPACPI_LED_NEW; 5419 5420 /* R30, R31, and unknown firmwares */ 5421 led_handle = NULL; 5422 return TPACPI_LED_NONE; 5423 } 5424 5425 static int __init led_init(struct ibm_init_struct *iibm) 5426 { 5427 unsigned int i; 5428 int rc; 5429 unsigned long useful_leds; 5430 5431 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5432 5433 led_supported = led_init_detect_mode(); 5434 5435 if (led_supported != TPACPI_LED_NONE) { 5436 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5437 ARRAY_SIZE(led_useful_qtable)); 5438 5439 if (!useful_leds) { 5440 led_handle = NULL; 5441 led_supported = TPACPI_LED_NONE; 5442 } 5443 } 5444 5445 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5446 str_supported(led_supported), led_supported); 5447 5448 if (led_supported == TPACPI_LED_NONE) 5449 return 1; 5450 5451 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5452 GFP_KERNEL); 5453 if (!tpacpi_leds) { 5454 pr_err("Out of memory for LED data\n"); 5455 return -ENOMEM; 5456 } 5457 5458 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5459 tpacpi_leds[i].led = -1; 5460 5461 if (!tpacpi_is_led_restricted(i) && 5462 test_bit(i, &useful_leds)) { 5463 rc = tpacpi_init_led(i); 5464 if (rc < 0) { 5465 led_exit(); 5466 return rc; 5467 } 5468 } 5469 } 5470 5471 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5472 pr_notice("warning: userspace override of important " 5473 "firmware LEDs is enabled\n"); 5474 #endif 5475 return 0; 5476 } 5477 5478 #define str_led_status(s) \ 5479 ((s) == TPACPI_LED_OFF ? "off" : \ 5480 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5481 5482 static int led_read(struct seq_file *m) 5483 { 5484 if (!led_supported) { 5485 seq_printf(m, "status:\t\tnot supported\n"); 5486 return 0; 5487 } 5488 seq_printf(m, "status:\t\tsupported\n"); 5489 5490 if (led_supported == TPACPI_LED_570) { 5491 /* 570 */ 5492 int i, status; 5493 for (i = 0; i < 8; i++) { 5494 status = led_get_status(i); 5495 if (status < 0) 5496 return -EIO; 5497 seq_printf(m, "%d:\t\t%s\n", 5498 i, str_led_status(status)); 5499 } 5500 } 5501 5502 seq_printf(m, "commands:\t" 5503 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5504 5505 return 0; 5506 } 5507 5508 static int led_write(char *buf) 5509 { 5510 char *cmd; 5511 int led, rc; 5512 enum led_status_t s; 5513 5514 if (!led_supported) 5515 return -ENODEV; 5516 5517 while ((cmd = next_cmd(&buf))) { 5518 if (sscanf(cmd, "%d", &led) != 1) 5519 return -EINVAL; 5520 5521 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 5522 tpacpi_leds[led].led < 0) 5523 return -ENODEV; 5524 5525 if (strstr(cmd, "off")) { 5526 s = TPACPI_LED_OFF; 5527 } else if (strstr(cmd, "on")) { 5528 s = TPACPI_LED_ON; 5529 } else if (strstr(cmd, "blink")) { 5530 s = TPACPI_LED_BLINK; 5531 } else { 5532 return -EINVAL; 5533 } 5534 5535 rc = led_set_status(led, s); 5536 if (rc < 0) 5537 return rc; 5538 } 5539 5540 return 0; 5541 } 5542 5543 static struct ibm_struct led_driver_data = { 5544 .name = "led", 5545 .read = led_read, 5546 .write = led_write, 5547 .exit = led_exit, 5548 }; 5549 5550 /************************************************************************* 5551 * Beep subdriver 5552 */ 5553 5554 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5555 5556 #define TPACPI_BEEP_Q1 0x0001 5557 5558 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5559 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5560 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5561 }; 5562 5563 static int __init beep_init(struct ibm_init_struct *iibm) 5564 { 5565 unsigned long quirks; 5566 5567 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5568 5569 TPACPI_ACPIHANDLE_INIT(beep); 5570 5571 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5572 str_supported(beep_handle != NULL)); 5573 5574 quirks = tpacpi_check_quirks(beep_quirk_table, 5575 ARRAY_SIZE(beep_quirk_table)); 5576 5577 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5578 5579 return (beep_handle)? 0 : 1; 5580 } 5581 5582 static int beep_read(struct seq_file *m) 5583 { 5584 if (!beep_handle) 5585 seq_printf(m, "status:\t\tnot supported\n"); 5586 else { 5587 seq_printf(m, "status:\t\tsupported\n"); 5588 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5589 } 5590 5591 return 0; 5592 } 5593 5594 static int beep_write(char *buf) 5595 { 5596 char *cmd; 5597 int beep_cmd; 5598 5599 if (!beep_handle) 5600 return -ENODEV; 5601 5602 while ((cmd = next_cmd(&buf))) { 5603 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 5604 beep_cmd >= 0 && beep_cmd <= 17) { 5605 /* beep_cmd set */ 5606 } else 5607 return -EINVAL; 5608 if (tp_features.beep_needs_two_args) { 5609 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 5610 beep_cmd, 0)) 5611 return -EIO; 5612 } else { 5613 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 5614 beep_cmd)) 5615 return -EIO; 5616 } 5617 } 5618 5619 return 0; 5620 } 5621 5622 static struct ibm_struct beep_driver_data = { 5623 .name = "beep", 5624 .read = beep_read, 5625 .write = beep_write, 5626 }; 5627 5628 /************************************************************************* 5629 * Thermal subdriver 5630 */ 5631 5632 enum thermal_access_mode { 5633 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 5634 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 5635 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 5636 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 5637 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 5638 }; 5639 5640 enum { /* TPACPI_THERMAL_TPEC_* */ 5641 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 5642 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 5643 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 5644 5645 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 5646 }; 5647 5648 5649 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 5650 struct ibm_thermal_sensors_struct { 5651 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 5652 }; 5653 5654 static enum thermal_access_mode thermal_read_mode; 5655 5656 /* idx is zero-based */ 5657 static int thermal_get_sensor(int idx, s32 *value) 5658 { 5659 int t; 5660 s8 tmp; 5661 char tmpi[5]; 5662 5663 t = TP_EC_THERMAL_TMP0; 5664 5665 switch (thermal_read_mode) { 5666 #if TPACPI_MAX_THERMAL_SENSORS >= 16 5667 case TPACPI_THERMAL_TPEC_16: 5668 if (idx >= 8 && idx <= 15) { 5669 t = TP_EC_THERMAL_TMP8; 5670 idx -= 8; 5671 } 5672 /* fallthrough */ 5673 #endif 5674 case TPACPI_THERMAL_TPEC_8: 5675 if (idx <= 7) { 5676 if (!acpi_ec_read(t + idx, &tmp)) 5677 return -EIO; 5678 *value = tmp * 1000; 5679 return 0; 5680 } 5681 break; 5682 5683 case TPACPI_THERMAL_ACPI_UPDT: 5684 if (idx <= 7) { 5685 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5686 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 5687 return -EIO; 5688 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5689 return -EIO; 5690 *value = (t - 2732) * 100; 5691 return 0; 5692 } 5693 break; 5694 5695 case TPACPI_THERMAL_ACPI_TMP07: 5696 if (idx <= 7) { 5697 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5698 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5699 return -EIO; 5700 if (t > 127 || t < -127) 5701 t = TP_EC_THERMAL_TMP_NA; 5702 *value = t * 1000; 5703 return 0; 5704 } 5705 break; 5706 5707 case TPACPI_THERMAL_NONE: 5708 default: 5709 return -ENOSYS; 5710 } 5711 5712 return -EINVAL; 5713 } 5714 5715 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 5716 { 5717 int res, i; 5718 int n; 5719 5720 n = 8; 5721 i = 0; 5722 5723 if (!s) 5724 return -EINVAL; 5725 5726 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 5727 n = 16; 5728 5729 for (i = 0 ; i < n; i++) { 5730 res = thermal_get_sensor(i, &s->temp[i]); 5731 if (res) 5732 return res; 5733 } 5734 5735 return n; 5736 } 5737 5738 static void thermal_dump_all_sensors(void) 5739 { 5740 int n, i; 5741 struct ibm_thermal_sensors_struct t; 5742 5743 n = thermal_get_sensors(&t); 5744 if (n <= 0) 5745 return; 5746 5747 pr_notice("temperatures (Celsius):"); 5748 5749 for (i = 0; i < n; i++) { 5750 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 5751 pr_cont(" %d", (int)(t.temp[i] / 1000)); 5752 else 5753 pr_cont(" N/A"); 5754 } 5755 5756 pr_cont("\n"); 5757 } 5758 5759 /* sysfs temp##_input -------------------------------------------------- */ 5760 5761 static ssize_t thermal_temp_input_show(struct device *dev, 5762 struct device_attribute *attr, 5763 char *buf) 5764 { 5765 struct sensor_device_attribute *sensor_attr = 5766 to_sensor_dev_attr(attr); 5767 int idx = sensor_attr->index; 5768 s32 value; 5769 int res; 5770 5771 res = thermal_get_sensor(idx, &value); 5772 if (res) 5773 return res; 5774 if (value == TPACPI_THERMAL_SENSOR_NA) 5775 return -ENXIO; 5776 5777 return snprintf(buf, PAGE_SIZE, "%d\n", value); 5778 } 5779 5780 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 5781 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 5782 thermal_temp_input_show, NULL, _idxB) 5783 5784 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 5785 THERMAL_SENSOR_ATTR_TEMP(1, 0), 5786 THERMAL_SENSOR_ATTR_TEMP(2, 1), 5787 THERMAL_SENSOR_ATTR_TEMP(3, 2), 5788 THERMAL_SENSOR_ATTR_TEMP(4, 3), 5789 THERMAL_SENSOR_ATTR_TEMP(5, 4), 5790 THERMAL_SENSOR_ATTR_TEMP(6, 5), 5791 THERMAL_SENSOR_ATTR_TEMP(7, 6), 5792 THERMAL_SENSOR_ATTR_TEMP(8, 7), 5793 THERMAL_SENSOR_ATTR_TEMP(9, 8), 5794 THERMAL_SENSOR_ATTR_TEMP(10, 9), 5795 THERMAL_SENSOR_ATTR_TEMP(11, 10), 5796 THERMAL_SENSOR_ATTR_TEMP(12, 11), 5797 THERMAL_SENSOR_ATTR_TEMP(13, 12), 5798 THERMAL_SENSOR_ATTR_TEMP(14, 13), 5799 THERMAL_SENSOR_ATTR_TEMP(15, 14), 5800 THERMAL_SENSOR_ATTR_TEMP(16, 15), 5801 }; 5802 5803 #define THERMAL_ATTRS(X) \ 5804 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 5805 5806 static struct attribute *thermal_temp_input_attr[] = { 5807 THERMAL_ATTRS(8), 5808 THERMAL_ATTRS(9), 5809 THERMAL_ATTRS(10), 5810 THERMAL_ATTRS(11), 5811 THERMAL_ATTRS(12), 5812 THERMAL_ATTRS(13), 5813 THERMAL_ATTRS(14), 5814 THERMAL_ATTRS(15), 5815 THERMAL_ATTRS(0), 5816 THERMAL_ATTRS(1), 5817 THERMAL_ATTRS(2), 5818 THERMAL_ATTRS(3), 5819 THERMAL_ATTRS(4), 5820 THERMAL_ATTRS(5), 5821 THERMAL_ATTRS(6), 5822 THERMAL_ATTRS(7), 5823 NULL 5824 }; 5825 5826 static const struct attribute_group thermal_temp_input16_group = { 5827 .attrs = thermal_temp_input_attr 5828 }; 5829 5830 static const struct attribute_group thermal_temp_input8_group = { 5831 .attrs = &thermal_temp_input_attr[8] 5832 }; 5833 5834 #undef THERMAL_SENSOR_ATTR_TEMP 5835 #undef THERMAL_ATTRS 5836 5837 /* --------------------------------------------------------------------- */ 5838 5839 static int __init thermal_init(struct ibm_init_struct *iibm) 5840 { 5841 u8 t, ta1, ta2; 5842 int i; 5843 int acpi_tmp7; 5844 int res; 5845 5846 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 5847 5848 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 5849 5850 if (thinkpad_id.ec_model) { 5851 /* 5852 * Direct EC access mode: sensors at registers 5853 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 5854 * non-implemented, thermal sensors return 0x80 when 5855 * not available 5856 */ 5857 5858 ta1 = ta2 = 0; 5859 for (i = 0; i < 8; i++) { 5860 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 5861 ta1 |= t; 5862 } else { 5863 ta1 = 0; 5864 break; 5865 } 5866 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 5867 ta2 |= t; 5868 } else { 5869 ta1 = 0; 5870 break; 5871 } 5872 } 5873 if (ta1 == 0) { 5874 /* This is sheer paranoia, but we handle it anyway */ 5875 if (acpi_tmp7) { 5876 pr_err("ThinkPad ACPI EC access misbehaving, " 5877 "falling back to ACPI TMPx access " 5878 "mode\n"); 5879 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5880 } else { 5881 pr_err("ThinkPad ACPI EC access misbehaving, " 5882 "disabling thermal sensors access\n"); 5883 thermal_read_mode = TPACPI_THERMAL_NONE; 5884 } 5885 } else { 5886 thermal_read_mode = 5887 (ta2 != 0) ? 5888 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 5889 } 5890 } else if (acpi_tmp7) { 5891 if (tpacpi_is_ibm() && 5892 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 5893 /* 600e/x, 770e, 770x */ 5894 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 5895 } else { 5896 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 5897 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5898 } 5899 } else { 5900 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 5901 thermal_read_mode = TPACPI_THERMAL_NONE; 5902 } 5903 5904 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 5905 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 5906 thermal_read_mode); 5907 5908 switch (thermal_read_mode) { 5909 case TPACPI_THERMAL_TPEC_16: 5910 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5911 &thermal_temp_input16_group); 5912 if (res) 5913 return res; 5914 break; 5915 case TPACPI_THERMAL_TPEC_8: 5916 case TPACPI_THERMAL_ACPI_TMP07: 5917 case TPACPI_THERMAL_ACPI_UPDT: 5918 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5919 &thermal_temp_input8_group); 5920 if (res) 5921 return res; 5922 break; 5923 case TPACPI_THERMAL_NONE: 5924 default: 5925 return 1; 5926 } 5927 5928 return 0; 5929 } 5930 5931 static void thermal_exit(void) 5932 { 5933 switch (thermal_read_mode) { 5934 case TPACPI_THERMAL_TPEC_16: 5935 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5936 &thermal_temp_input16_group); 5937 break; 5938 case TPACPI_THERMAL_TPEC_8: 5939 case TPACPI_THERMAL_ACPI_TMP07: 5940 case TPACPI_THERMAL_ACPI_UPDT: 5941 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5942 &thermal_temp_input8_group); 5943 break; 5944 case TPACPI_THERMAL_NONE: 5945 default: 5946 break; 5947 } 5948 } 5949 5950 static int thermal_read(struct seq_file *m) 5951 { 5952 int n, i; 5953 struct ibm_thermal_sensors_struct t; 5954 5955 n = thermal_get_sensors(&t); 5956 if (unlikely(n < 0)) 5957 return n; 5958 5959 seq_printf(m, "temperatures:\t"); 5960 5961 if (n > 0) { 5962 for (i = 0; i < (n - 1); i++) 5963 seq_printf(m, "%d ", t.temp[i] / 1000); 5964 seq_printf(m, "%d\n", t.temp[i] / 1000); 5965 } else 5966 seq_printf(m, "not supported\n"); 5967 5968 return 0; 5969 } 5970 5971 static struct ibm_struct thermal_driver_data = { 5972 .name = "thermal", 5973 .read = thermal_read, 5974 .exit = thermal_exit, 5975 }; 5976 5977 /************************************************************************* 5978 * Backlight/brightness subdriver 5979 */ 5980 5981 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 5982 5983 /* 5984 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 5985 * CMOS NVRAM byte 0x5E, bits 0-3. 5986 * 5987 * EC HBRV (0x31) has the following layout 5988 * Bit 7: unknown function 5989 * Bit 6: unknown function 5990 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 5991 * Bit 4: must be set to zero to avoid problems 5992 * Bit 3-0: backlight brightness level 5993 * 5994 * brightness_get_raw returns status data in the HBRV layout 5995 * 5996 * WARNING: The X61 has been verified to use HBRV for something else, so 5997 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 5998 * testing on the very early *60 Lenovo models... 5999 */ 6000 6001 enum { 6002 TP_EC_BACKLIGHT = 0x31, 6003 6004 /* TP_EC_BACKLIGHT bitmasks */ 6005 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6006 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6007 TP_EC_BACKLIGHT_MAPSW = 0x20, 6008 }; 6009 6010 enum tpacpi_brightness_access_mode { 6011 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6012 TPACPI_BRGHT_MODE_EC, /* EC control */ 6013 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6014 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6015 TPACPI_BRGHT_MODE_MAX 6016 }; 6017 6018 static struct backlight_device *ibm_backlight_device; 6019 6020 static enum tpacpi_brightness_access_mode brightness_mode = 6021 TPACPI_BRGHT_MODE_MAX; 6022 6023 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6024 6025 static struct mutex brightness_mutex; 6026 6027 /* NVRAM brightness access, 6028 * call with brightness_mutex held! */ 6029 static unsigned int tpacpi_brightness_nvram_get(void) 6030 { 6031 u8 lnvram; 6032 6033 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6034 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6035 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6036 lnvram &= bright_maxlvl; 6037 6038 return lnvram; 6039 } 6040 6041 static void tpacpi_brightness_checkpoint_nvram(void) 6042 { 6043 u8 lec = 0; 6044 u8 b_nvram; 6045 6046 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6047 return; 6048 6049 vdbg_printk(TPACPI_DBG_BRGHT, 6050 "trying to checkpoint backlight level to NVRAM...\n"); 6051 6052 if (mutex_lock_killable(&brightness_mutex) < 0) 6053 return; 6054 6055 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6056 goto unlock; 6057 lec &= TP_EC_BACKLIGHT_LVLMSK; 6058 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6059 6060 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6061 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6062 /* NVRAM needs update */ 6063 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6064 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6065 b_nvram |= lec; 6066 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6067 dbg_printk(TPACPI_DBG_BRGHT, 6068 "updated NVRAM backlight level to %u (0x%02x)\n", 6069 (unsigned int) lec, (unsigned int) b_nvram); 6070 } else 6071 vdbg_printk(TPACPI_DBG_BRGHT, 6072 "NVRAM backlight level already is %u (0x%02x)\n", 6073 (unsigned int) lec, (unsigned int) b_nvram); 6074 6075 unlock: 6076 mutex_unlock(&brightness_mutex); 6077 } 6078 6079 6080 /* call with brightness_mutex held! */ 6081 static int tpacpi_brightness_get_raw(int *status) 6082 { 6083 u8 lec = 0; 6084 6085 switch (brightness_mode) { 6086 case TPACPI_BRGHT_MODE_UCMS_STEP: 6087 *status = tpacpi_brightness_nvram_get(); 6088 return 0; 6089 case TPACPI_BRGHT_MODE_EC: 6090 case TPACPI_BRGHT_MODE_ECNVRAM: 6091 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6092 return -EIO; 6093 *status = lec; 6094 return 0; 6095 default: 6096 return -ENXIO; 6097 } 6098 } 6099 6100 /* call with brightness_mutex held! */ 6101 /* do NOT call with illegal backlight level value */ 6102 static int tpacpi_brightness_set_ec(unsigned int value) 6103 { 6104 u8 lec = 0; 6105 6106 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6107 return -EIO; 6108 6109 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6110 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6111 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6112 return -EIO; 6113 6114 return 0; 6115 } 6116 6117 /* call with brightness_mutex held! */ 6118 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6119 { 6120 int cmos_cmd, inc; 6121 unsigned int current_value, i; 6122 6123 current_value = tpacpi_brightness_nvram_get(); 6124 6125 if (value == current_value) 6126 return 0; 6127 6128 cmos_cmd = (value > current_value) ? 6129 TP_CMOS_BRIGHTNESS_UP : 6130 TP_CMOS_BRIGHTNESS_DOWN; 6131 inc = (value > current_value) ? 1 : -1; 6132 6133 for (i = current_value; i != value; i += inc) 6134 if (issue_thinkpad_cmos_command(cmos_cmd)) 6135 return -EIO; 6136 6137 return 0; 6138 } 6139 6140 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6141 static int brightness_set(unsigned int value) 6142 { 6143 int res; 6144 6145 if (value > bright_maxlvl || value < 0) 6146 return -EINVAL; 6147 6148 vdbg_printk(TPACPI_DBG_BRGHT, 6149 "set backlight level to %d\n", value); 6150 6151 res = mutex_lock_killable(&brightness_mutex); 6152 if (res < 0) 6153 return res; 6154 6155 switch (brightness_mode) { 6156 case TPACPI_BRGHT_MODE_EC: 6157 case TPACPI_BRGHT_MODE_ECNVRAM: 6158 res = tpacpi_brightness_set_ec(value); 6159 break; 6160 case TPACPI_BRGHT_MODE_UCMS_STEP: 6161 res = tpacpi_brightness_set_ucmsstep(value); 6162 break; 6163 default: 6164 res = -ENXIO; 6165 } 6166 6167 mutex_unlock(&brightness_mutex); 6168 return res; 6169 } 6170 6171 /* sysfs backlight class ----------------------------------------------- */ 6172 6173 static int brightness_update_status(struct backlight_device *bd) 6174 { 6175 unsigned int level = 6176 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6177 bd->props.power == FB_BLANK_UNBLANK) ? 6178 bd->props.brightness : 0; 6179 6180 dbg_printk(TPACPI_DBG_BRGHT, 6181 "backlight: attempt to set level to %d\n", 6182 level); 6183 6184 /* it is the backlight class's job (caller) to handle 6185 * EINTR and other errors properly */ 6186 return brightness_set(level); 6187 } 6188 6189 static int brightness_get(struct backlight_device *bd) 6190 { 6191 int status, res; 6192 6193 res = mutex_lock_killable(&brightness_mutex); 6194 if (res < 0) 6195 return 0; 6196 6197 res = tpacpi_brightness_get_raw(&status); 6198 6199 mutex_unlock(&brightness_mutex); 6200 6201 if (res < 0) 6202 return 0; 6203 6204 return status & TP_EC_BACKLIGHT_LVLMSK; 6205 } 6206 6207 static void tpacpi_brightness_notify_change(void) 6208 { 6209 backlight_force_update(ibm_backlight_device, 6210 BACKLIGHT_UPDATE_HOTKEY); 6211 } 6212 6213 static const struct backlight_ops ibm_backlight_data = { 6214 .get_brightness = brightness_get, 6215 .update_status = brightness_update_status, 6216 }; 6217 6218 /* --------------------------------------------------------------------- */ 6219 6220 /* 6221 * Call _BCL method of video device. On some ThinkPads this will 6222 * switch the firmware to the ACPI brightness control mode. 6223 */ 6224 6225 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6226 { 6227 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6228 union acpi_object *obj; 6229 struct acpi_device *device, *child; 6230 int rc; 6231 6232 if (acpi_bus_get_device(handle, &device)) 6233 return 0; 6234 6235 rc = 0; 6236 list_for_each_entry(child, &device->children, node) { 6237 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6238 NULL, &buffer); 6239 if (ACPI_FAILURE(status)) 6240 continue; 6241 6242 obj = (union acpi_object *)buffer.pointer; 6243 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6244 pr_err("Unknown _BCL data, please report this to %s\n", 6245 TPACPI_MAIL); 6246 rc = 0; 6247 } else { 6248 rc = obj->package.count; 6249 } 6250 break; 6251 } 6252 6253 kfree(buffer.pointer); 6254 return rc; 6255 } 6256 6257 6258 /* 6259 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6260 */ 6261 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6262 { 6263 acpi_handle video_device; 6264 int bcl_levels = 0; 6265 6266 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6267 if (video_device) 6268 bcl_levels = tpacpi_query_bcl_levels(video_device); 6269 6270 tp_features.bright_acpimode = (bcl_levels > 0); 6271 6272 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6273 } 6274 6275 /* 6276 * These are only useful for models that have only one possibility 6277 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6278 * these quirks. 6279 */ 6280 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6281 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6282 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6283 6284 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6285 /* Models with ATI GPUs known to require ECNVRAM mode */ 6286 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6287 6288 /* Models with ATI GPUs that can use ECNVRAM */ 6289 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6290 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6291 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6292 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6293 6294 /* Models with Intel Extreme Graphics 2 */ 6295 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6296 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6297 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6298 6299 /* Models with Intel GMA900 */ 6300 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6301 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6302 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6303 }; 6304 6305 /* 6306 * Returns < 0 for error, otherwise sets tp_features.bright_* 6307 * and bright_maxlvl. 6308 */ 6309 static void __init tpacpi_detect_brightness_capabilities(void) 6310 { 6311 unsigned int b; 6312 6313 vdbg_printk(TPACPI_DBG_INIT, 6314 "detecting firmware brightness interface capabilities\n"); 6315 6316 /* we could run a quirks check here (same table used by 6317 * brightness_init) if needed */ 6318 6319 /* 6320 * We always attempt to detect acpi support, so as to switch 6321 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6322 * going to publish a backlight interface 6323 */ 6324 b = tpacpi_check_std_acpi_brightness_support(); 6325 switch (b) { 6326 case 16: 6327 bright_maxlvl = 15; 6328 pr_info("detected a 16-level brightness capable ThinkPad\n"); 6329 break; 6330 case 8: 6331 case 0: 6332 bright_maxlvl = 7; 6333 pr_info("detected a 8-level brightness capable ThinkPad\n"); 6334 break; 6335 default: 6336 pr_err("Unsupported brightness interface, " 6337 "please contact %s\n", TPACPI_MAIL); 6338 tp_features.bright_unkfw = 1; 6339 bright_maxlvl = b - 1; 6340 } 6341 } 6342 6343 static int __init brightness_init(struct ibm_init_struct *iibm) 6344 { 6345 struct backlight_properties props; 6346 int b; 6347 unsigned long quirks; 6348 6349 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6350 6351 mutex_init(&brightness_mutex); 6352 6353 quirks = tpacpi_check_quirks(brightness_quirk_table, 6354 ARRAY_SIZE(brightness_quirk_table)); 6355 6356 /* tpacpi_detect_brightness_capabilities() must have run already */ 6357 6358 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6359 if (tp_features.bright_unkfw) 6360 return 1; 6361 6362 if (!brightness_enable) { 6363 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6364 "brightness support disabled by " 6365 "module parameter\n"); 6366 return 1; 6367 } 6368 6369 if (acpi_video_backlight_support()) { 6370 if (brightness_enable > 1) { 6371 pr_info("Standard ACPI backlight interface " 6372 "available, not loading native one\n"); 6373 return 1; 6374 } else if (brightness_enable == 1) { 6375 pr_warn("Cannot enable backlight brightness support, " 6376 "ACPI is already handling it. Refer to the " 6377 "acpi_backlight kernel parameter.\n"); 6378 return 1; 6379 } 6380 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6381 pr_notice("Standard ACPI backlight interface not " 6382 "available, thinkpad_acpi native " 6383 "brightness control enabled\n"); 6384 } 6385 6386 /* 6387 * Check for module parameter bogosity, note that we 6388 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6389 * able to detect "unspecified" 6390 */ 6391 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6392 return -EINVAL; 6393 6394 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6395 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6396 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6397 if (quirks & TPACPI_BRGHT_Q_EC) 6398 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6399 else 6400 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6401 6402 dbg_printk(TPACPI_DBG_BRGHT, 6403 "driver auto-selected brightness_mode=%d\n", 6404 brightness_mode); 6405 } 6406 6407 /* Safety */ 6408 if (!tpacpi_is_ibm() && 6409 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6410 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6411 return -EINVAL; 6412 6413 if (tpacpi_brightness_get_raw(&b) < 0) 6414 return 1; 6415 6416 memset(&props, 0, sizeof(struct backlight_properties)); 6417 props.type = BACKLIGHT_PLATFORM; 6418 props.max_brightness = bright_maxlvl; 6419 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6420 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6421 NULL, NULL, 6422 &ibm_backlight_data, 6423 &props); 6424 if (IS_ERR(ibm_backlight_device)) { 6425 int rc = PTR_ERR(ibm_backlight_device); 6426 ibm_backlight_device = NULL; 6427 pr_err("Could not register backlight device\n"); 6428 return rc; 6429 } 6430 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6431 "brightness is supported\n"); 6432 6433 if (quirks & TPACPI_BRGHT_Q_ASK) { 6434 pr_notice("brightness: will use unverified default: " 6435 "brightness_mode=%d\n", brightness_mode); 6436 pr_notice("brightness: please report to %s whether it works well " 6437 "or not on your ThinkPad\n", TPACPI_MAIL); 6438 } 6439 6440 /* Added by mistake in early 2007. Probably useless, but it could 6441 * be working around some unknown firmware problem where the value 6442 * read at startup doesn't match the real hardware state... so leave 6443 * it in place just in case */ 6444 backlight_update_status(ibm_backlight_device); 6445 6446 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6447 "brightness: registering brightness hotkeys " 6448 "as change notification\n"); 6449 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6450 | TP_ACPI_HKEY_BRGHTUP_MASK 6451 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6452 return 0; 6453 } 6454 6455 static void brightness_suspend(void) 6456 { 6457 tpacpi_brightness_checkpoint_nvram(); 6458 } 6459 6460 static void brightness_shutdown(void) 6461 { 6462 tpacpi_brightness_checkpoint_nvram(); 6463 } 6464 6465 static void brightness_exit(void) 6466 { 6467 if (ibm_backlight_device) { 6468 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6469 "calling backlight_device_unregister()\n"); 6470 backlight_device_unregister(ibm_backlight_device); 6471 } 6472 6473 tpacpi_brightness_checkpoint_nvram(); 6474 } 6475 6476 static int brightness_read(struct seq_file *m) 6477 { 6478 int level; 6479 6480 level = brightness_get(NULL); 6481 if (level < 0) { 6482 seq_printf(m, "level:\t\tunreadable\n"); 6483 } else { 6484 seq_printf(m, "level:\t\t%d\n", level); 6485 seq_printf(m, "commands:\tup, down\n"); 6486 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6487 bright_maxlvl); 6488 } 6489 6490 return 0; 6491 } 6492 6493 static int brightness_write(char *buf) 6494 { 6495 int level; 6496 int rc; 6497 char *cmd; 6498 6499 level = brightness_get(NULL); 6500 if (level < 0) 6501 return level; 6502 6503 while ((cmd = next_cmd(&buf))) { 6504 if (strlencmp(cmd, "up") == 0) { 6505 if (level < bright_maxlvl) 6506 level++; 6507 } else if (strlencmp(cmd, "down") == 0) { 6508 if (level > 0) 6509 level--; 6510 } else if (sscanf(cmd, "level %d", &level) == 1 && 6511 level >= 0 && level <= bright_maxlvl) { 6512 /* new level set */ 6513 } else 6514 return -EINVAL; 6515 } 6516 6517 tpacpi_disclose_usertask("procfs brightness", 6518 "set level to %d\n", level); 6519 6520 /* 6521 * Now we know what the final level should be, so we try to set it. 6522 * Doing it this way makes the syscall restartable in case of EINTR 6523 */ 6524 rc = brightness_set(level); 6525 if (!rc && ibm_backlight_device) 6526 backlight_force_update(ibm_backlight_device, 6527 BACKLIGHT_UPDATE_SYSFS); 6528 return (rc == -EINTR)? -ERESTARTSYS : rc; 6529 } 6530 6531 static struct ibm_struct brightness_driver_data = { 6532 .name = "brightness", 6533 .read = brightness_read, 6534 .write = brightness_write, 6535 .exit = brightness_exit, 6536 .suspend = brightness_suspend, 6537 .shutdown = brightness_shutdown, 6538 }; 6539 6540 /************************************************************************* 6541 * Volume subdriver 6542 */ 6543 6544 /* 6545 * IBM ThinkPads have a simple volume controller with MUTE gating. 6546 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 6547 * 6548 * Since the *61 series (and probably also the later *60 series), Lenovo 6549 * ThinkPads only implement the MUTE gate. 6550 * 6551 * EC register 0x30 6552 * Bit 6: MUTE (1 mutes sound) 6553 * Bit 3-0: Volume 6554 * Other bits should be zero as far as we know. 6555 * 6556 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 6557 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 6558 * such as bit 7 which is used to detect repeated presses of MUTE, 6559 * and we leave them unchanged. 6560 */ 6561 6562 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 6563 6564 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 6565 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 6566 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 6567 6568 #if SNDRV_CARDS <= 32 6569 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 6570 #else 6571 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 6572 #endif 6573 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 6574 static char *alsa_id = "ThinkPadEC"; 6575 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 6576 6577 struct tpacpi_alsa_data { 6578 struct snd_card *card; 6579 struct snd_ctl_elem_id *ctl_mute_id; 6580 struct snd_ctl_elem_id *ctl_vol_id; 6581 }; 6582 6583 static struct snd_card *alsa_card; 6584 6585 enum { 6586 TP_EC_AUDIO = 0x30, 6587 6588 /* TP_EC_AUDIO bits */ 6589 TP_EC_AUDIO_MUTESW = 6, 6590 6591 /* TP_EC_AUDIO bitmasks */ 6592 TP_EC_AUDIO_LVL_MSK = 0x0F, 6593 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 6594 6595 /* Maximum volume */ 6596 TP_EC_VOLUME_MAX = 14, 6597 }; 6598 6599 enum tpacpi_volume_access_mode { 6600 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 6601 TPACPI_VOL_MODE_EC, /* Pure EC control */ 6602 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 6603 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6604 TPACPI_VOL_MODE_MAX 6605 }; 6606 6607 enum tpacpi_volume_capabilities { 6608 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 6609 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 6610 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 6611 TPACPI_VOL_CAP_MAX 6612 }; 6613 6614 static enum tpacpi_volume_access_mode volume_mode = 6615 TPACPI_VOL_MODE_MAX; 6616 6617 static enum tpacpi_volume_capabilities volume_capabilities; 6618 static bool volume_control_allowed; 6619 6620 /* 6621 * Used to syncronize writers to TP_EC_AUDIO and 6622 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 6623 */ 6624 static struct mutex volume_mutex; 6625 6626 static void tpacpi_volume_checkpoint_nvram(void) 6627 { 6628 u8 lec = 0; 6629 u8 b_nvram; 6630 u8 ec_mask; 6631 6632 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 6633 return; 6634 if (!volume_control_allowed) 6635 return; 6636 6637 vdbg_printk(TPACPI_DBG_MIXER, 6638 "trying to checkpoint mixer state to NVRAM...\n"); 6639 6640 if (tp_features.mixer_no_level_control) 6641 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 6642 else 6643 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 6644 6645 if (mutex_lock_killable(&volume_mutex) < 0) 6646 return; 6647 6648 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 6649 goto unlock; 6650 lec &= ec_mask; 6651 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 6652 6653 if (lec != (b_nvram & ec_mask)) { 6654 /* NVRAM needs update */ 6655 b_nvram &= ~ec_mask; 6656 b_nvram |= lec; 6657 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 6658 dbg_printk(TPACPI_DBG_MIXER, 6659 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 6660 (unsigned int) lec, (unsigned int) b_nvram); 6661 } else { 6662 vdbg_printk(TPACPI_DBG_MIXER, 6663 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 6664 (unsigned int) lec, (unsigned int) b_nvram); 6665 } 6666 6667 unlock: 6668 mutex_unlock(&volume_mutex); 6669 } 6670 6671 static int volume_get_status_ec(u8 *status) 6672 { 6673 u8 s; 6674 6675 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 6676 return -EIO; 6677 6678 *status = s; 6679 6680 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 6681 6682 return 0; 6683 } 6684 6685 static int volume_get_status(u8 *status) 6686 { 6687 return volume_get_status_ec(status); 6688 } 6689 6690 static int volume_set_status_ec(const u8 status) 6691 { 6692 if (!acpi_ec_write(TP_EC_AUDIO, status)) 6693 return -EIO; 6694 6695 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 6696 6697 return 0; 6698 } 6699 6700 static int volume_set_status(const u8 status) 6701 { 6702 return volume_set_status_ec(status); 6703 } 6704 6705 /* returns < 0 on error, 0 on no change, 1 on change */ 6706 static int __volume_set_mute_ec(const bool mute) 6707 { 6708 int rc; 6709 u8 s, n; 6710 6711 if (mutex_lock_killable(&volume_mutex) < 0) 6712 return -EINTR; 6713 6714 rc = volume_get_status_ec(&s); 6715 if (rc) 6716 goto unlock; 6717 6718 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 6719 s & ~TP_EC_AUDIO_MUTESW_MSK; 6720 6721 if (n != s) { 6722 rc = volume_set_status_ec(n); 6723 if (!rc) 6724 rc = 1; 6725 } 6726 6727 unlock: 6728 mutex_unlock(&volume_mutex); 6729 return rc; 6730 } 6731 6732 static int volume_alsa_set_mute(const bool mute) 6733 { 6734 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 6735 (mute) ? "" : "un"); 6736 return __volume_set_mute_ec(mute); 6737 } 6738 6739 static int volume_set_mute(const bool mute) 6740 { 6741 int rc; 6742 6743 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 6744 (mute) ? "" : "un"); 6745 6746 rc = __volume_set_mute_ec(mute); 6747 return (rc < 0) ? rc : 0; 6748 } 6749 6750 /* returns < 0 on error, 0 on no change, 1 on change */ 6751 static int __volume_set_volume_ec(const u8 vol) 6752 { 6753 int rc; 6754 u8 s, n; 6755 6756 if (vol > TP_EC_VOLUME_MAX) 6757 return -EINVAL; 6758 6759 if (mutex_lock_killable(&volume_mutex) < 0) 6760 return -EINTR; 6761 6762 rc = volume_get_status_ec(&s); 6763 if (rc) 6764 goto unlock; 6765 6766 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 6767 6768 if (n != s) { 6769 rc = volume_set_status_ec(n); 6770 if (!rc) 6771 rc = 1; 6772 } 6773 6774 unlock: 6775 mutex_unlock(&volume_mutex); 6776 return rc; 6777 } 6778 6779 static int volume_alsa_set_volume(const u8 vol) 6780 { 6781 dbg_printk(TPACPI_DBG_MIXER, 6782 "ALSA: trying to set volume level to %hu\n", vol); 6783 return __volume_set_volume_ec(vol); 6784 } 6785 6786 static void volume_alsa_notify_change(void) 6787 { 6788 struct tpacpi_alsa_data *d; 6789 6790 if (alsa_card && alsa_card->private_data) { 6791 d = alsa_card->private_data; 6792 if (d->ctl_mute_id) 6793 snd_ctl_notify(alsa_card, 6794 SNDRV_CTL_EVENT_MASK_VALUE, 6795 d->ctl_mute_id); 6796 if (d->ctl_vol_id) 6797 snd_ctl_notify(alsa_card, 6798 SNDRV_CTL_EVENT_MASK_VALUE, 6799 d->ctl_vol_id); 6800 } 6801 } 6802 6803 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 6804 struct snd_ctl_elem_info *uinfo) 6805 { 6806 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 6807 uinfo->count = 1; 6808 uinfo->value.integer.min = 0; 6809 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 6810 return 0; 6811 } 6812 6813 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 6814 struct snd_ctl_elem_value *ucontrol) 6815 { 6816 u8 s; 6817 int rc; 6818 6819 rc = volume_get_status(&s); 6820 if (rc < 0) 6821 return rc; 6822 6823 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 6824 return 0; 6825 } 6826 6827 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 6828 struct snd_ctl_elem_value *ucontrol) 6829 { 6830 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 6831 ucontrol->value.integer.value[0]); 6832 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 6833 } 6834 6835 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 6836 6837 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 6838 struct snd_ctl_elem_value *ucontrol) 6839 { 6840 u8 s; 6841 int rc; 6842 6843 rc = volume_get_status(&s); 6844 if (rc < 0) 6845 return rc; 6846 6847 ucontrol->value.integer.value[0] = 6848 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 6849 return 0; 6850 } 6851 6852 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 6853 struct snd_ctl_elem_value *ucontrol) 6854 { 6855 tpacpi_disclose_usertask("ALSA", "%smute\n", 6856 ucontrol->value.integer.value[0] ? 6857 "un" : ""); 6858 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 6859 } 6860 6861 static struct snd_kcontrol_new volume_alsa_control_vol = { 6862 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6863 .name = "Console Playback Volume", 6864 .index = 0, 6865 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6866 .info = volume_alsa_vol_info, 6867 .get = volume_alsa_vol_get, 6868 }; 6869 6870 static struct snd_kcontrol_new volume_alsa_control_mute = { 6871 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6872 .name = "Console Playback Switch", 6873 .index = 0, 6874 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6875 .info = volume_alsa_mute_info, 6876 .get = volume_alsa_mute_get, 6877 }; 6878 6879 static void volume_suspend(void) 6880 { 6881 tpacpi_volume_checkpoint_nvram(); 6882 } 6883 6884 static void volume_resume(void) 6885 { 6886 volume_alsa_notify_change(); 6887 } 6888 6889 static void volume_shutdown(void) 6890 { 6891 tpacpi_volume_checkpoint_nvram(); 6892 } 6893 6894 static void volume_exit(void) 6895 { 6896 if (alsa_card) { 6897 snd_card_free(alsa_card); 6898 alsa_card = NULL; 6899 } 6900 6901 tpacpi_volume_checkpoint_nvram(); 6902 } 6903 6904 static int __init volume_create_alsa_mixer(void) 6905 { 6906 struct snd_card *card; 6907 struct tpacpi_alsa_data *data; 6908 struct snd_kcontrol *ctl_vol; 6909 struct snd_kcontrol *ctl_mute; 6910 int rc; 6911 6912 rc = snd_card_new(&tpacpi_pdev->dev, 6913 alsa_index, alsa_id, THIS_MODULE, 6914 sizeof(struct tpacpi_alsa_data), &card); 6915 if (rc < 0 || !card) { 6916 pr_err("Failed to create ALSA card structures: %d\n", rc); 6917 return 1; 6918 } 6919 6920 BUG_ON(!card->private_data); 6921 data = card->private_data; 6922 data->card = card; 6923 6924 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 6925 sizeof(card->driver)); 6926 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 6927 sizeof(card->shortname)); 6928 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 6929 (thinkpad_id.ec_version_str) ? 6930 thinkpad_id.ec_version_str : "(unknown)"); 6931 snprintf(card->longname, sizeof(card->longname), 6932 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 6933 (thinkpad_id.ec_version_str) ? 6934 thinkpad_id.ec_version_str : "unknown"); 6935 6936 if (volume_control_allowed) { 6937 volume_alsa_control_vol.put = volume_alsa_vol_put; 6938 volume_alsa_control_vol.access = 6939 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6940 6941 volume_alsa_control_mute.put = volume_alsa_mute_put; 6942 volume_alsa_control_mute.access = 6943 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6944 } 6945 6946 if (!tp_features.mixer_no_level_control) { 6947 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 6948 rc = snd_ctl_add(card, ctl_vol); 6949 if (rc < 0) { 6950 pr_err("Failed to create ALSA volume control: %d\n", 6951 rc); 6952 goto err_exit; 6953 } 6954 data->ctl_vol_id = &ctl_vol->id; 6955 } 6956 6957 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 6958 rc = snd_ctl_add(card, ctl_mute); 6959 if (rc < 0) { 6960 pr_err("Failed to create ALSA mute control: %d\n", rc); 6961 goto err_exit; 6962 } 6963 data->ctl_mute_id = &ctl_mute->id; 6964 6965 rc = snd_card_register(card); 6966 if (rc < 0) { 6967 pr_err("Failed to register ALSA card: %d\n", rc); 6968 goto err_exit; 6969 } 6970 6971 alsa_card = card; 6972 return 0; 6973 6974 err_exit: 6975 snd_card_free(card); 6976 return 1; 6977 } 6978 6979 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 6980 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 6981 6982 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 6983 /* Whitelist volume level on all IBM by default */ 6984 { .vendor = PCI_VENDOR_ID_IBM, 6985 .bios = TPACPI_MATCH_ANY, 6986 .ec = TPACPI_MATCH_ANY, 6987 .quirks = TPACPI_VOL_Q_LEVEL }, 6988 6989 /* Lenovo models with volume control (needs confirmation) */ 6990 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 6991 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 6992 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 6993 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 6994 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 6995 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 6996 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 6997 6998 /* Whitelist mute-only on all Lenovo by default */ 6999 { .vendor = PCI_VENDOR_ID_LENOVO, 7000 .bios = TPACPI_MATCH_ANY, 7001 .ec = TPACPI_MATCH_ANY, 7002 .quirks = TPACPI_VOL_Q_MUTEONLY } 7003 }; 7004 7005 static int __init volume_init(struct ibm_init_struct *iibm) 7006 { 7007 unsigned long quirks; 7008 int rc; 7009 7010 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7011 7012 mutex_init(&volume_mutex); 7013 7014 /* 7015 * Check for module parameter bogosity, note that we 7016 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7017 * able to detect "unspecified" 7018 */ 7019 if (volume_mode > TPACPI_VOL_MODE_MAX) 7020 return -EINVAL; 7021 7022 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7023 pr_err("UCMS step volume mode not implemented, " 7024 "please contact %s\n", TPACPI_MAIL); 7025 return 1; 7026 } 7027 7028 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7029 return -EINVAL; 7030 7031 /* 7032 * The ALSA mixer is our primary interface. 7033 * When disabled, don't install the subdriver at all 7034 */ 7035 if (!alsa_enable) { 7036 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7037 "ALSA mixer disabled by parameter, " 7038 "not loading volume subdriver...\n"); 7039 return 1; 7040 } 7041 7042 quirks = tpacpi_check_quirks(volume_quirk_table, 7043 ARRAY_SIZE(volume_quirk_table)); 7044 7045 switch (volume_capabilities) { 7046 case TPACPI_VOL_CAP_AUTO: 7047 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7048 tp_features.mixer_no_level_control = 1; 7049 else if (quirks & TPACPI_VOL_Q_LEVEL) 7050 tp_features.mixer_no_level_control = 0; 7051 else 7052 return 1; /* no mixer */ 7053 break; 7054 case TPACPI_VOL_CAP_VOLMUTE: 7055 tp_features.mixer_no_level_control = 0; 7056 break; 7057 case TPACPI_VOL_CAP_MUTEONLY: 7058 tp_features.mixer_no_level_control = 1; 7059 break; 7060 default: 7061 return 1; 7062 } 7063 7064 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7065 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7066 "using user-supplied volume_capabilities=%d\n", 7067 volume_capabilities); 7068 7069 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7070 volume_mode == TPACPI_VOL_MODE_MAX) { 7071 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7072 7073 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7074 "driver auto-selected volume_mode=%d\n", 7075 volume_mode); 7076 } else { 7077 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7078 "using user-supplied volume_mode=%d\n", 7079 volume_mode); 7080 } 7081 7082 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7083 "mute is supported, volume control is %s\n", 7084 str_supported(!tp_features.mixer_no_level_control)); 7085 7086 rc = volume_create_alsa_mixer(); 7087 if (rc) { 7088 pr_err("Could not create the ALSA mixer interface\n"); 7089 return rc; 7090 } 7091 7092 pr_info("Console audio control enabled, mode: %s\n", 7093 (volume_control_allowed) ? 7094 "override (read/write)" : 7095 "monitor (read only)"); 7096 7097 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7098 "registering volume hotkeys as change notification\n"); 7099 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7100 | TP_ACPI_HKEY_VOLUP_MASK 7101 | TP_ACPI_HKEY_VOLDWN_MASK 7102 | TP_ACPI_HKEY_MUTE_MASK); 7103 7104 return 0; 7105 } 7106 7107 static int volume_read(struct seq_file *m) 7108 { 7109 u8 status; 7110 7111 if (volume_get_status(&status) < 0) { 7112 seq_printf(m, "level:\t\tunreadable\n"); 7113 } else { 7114 if (tp_features.mixer_no_level_control) 7115 seq_printf(m, "level:\t\tunsupported\n"); 7116 else 7117 seq_printf(m, "level:\t\t%d\n", 7118 status & TP_EC_AUDIO_LVL_MSK); 7119 7120 seq_printf(m, "mute:\t\t%s\n", 7121 onoff(status, TP_EC_AUDIO_MUTESW)); 7122 7123 if (volume_control_allowed) { 7124 seq_printf(m, "commands:\tunmute, mute\n"); 7125 if (!tp_features.mixer_no_level_control) { 7126 seq_printf(m, 7127 "commands:\tup, down\n"); 7128 seq_printf(m, 7129 "commands:\tlevel <level>" 7130 " (<level> is 0-%d)\n", 7131 TP_EC_VOLUME_MAX); 7132 } 7133 } 7134 } 7135 7136 return 0; 7137 } 7138 7139 static int volume_write(char *buf) 7140 { 7141 u8 s; 7142 u8 new_level, new_mute; 7143 int l; 7144 char *cmd; 7145 int rc; 7146 7147 /* 7148 * We do allow volume control at driver startup, so that the 7149 * user can set initial state through the volume=... parameter hack. 7150 */ 7151 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7152 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7153 tp_warned.volume_ctrl_forbidden = 1; 7154 pr_notice("Console audio control in monitor mode, " 7155 "changes are not allowed\n"); 7156 pr_notice("Use the volume_control=1 module parameter " 7157 "to enable volume control\n"); 7158 } 7159 return -EPERM; 7160 } 7161 7162 rc = volume_get_status(&s); 7163 if (rc < 0) 7164 return rc; 7165 7166 new_level = s & TP_EC_AUDIO_LVL_MSK; 7167 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7168 7169 while ((cmd = next_cmd(&buf))) { 7170 if (!tp_features.mixer_no_level_control) { 7171 if (strlencmp(cmd, "up") == 0) { 7172 if (new_mute) 7173 new_mute = 0; 7174 else if (new_level < TP_EC_VOLUME_MAX) 7175 new_level++; 7176 continue; 7177 } else if (strlencmp(cmd, "down") == 0) { 7178 if (new_mute) 7179 new_mute = 0; 7180 else if (new_level > 0) 7181 new_level--; 7182 continue; 7183 } else if (sscanf(cmd, "level %u", &l) == 1 && 7184 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7185 new_level = l; 7186 continue; 7187 } 7188 } 7189 if (strlencmp(cmd, "mute") == 0) 7190 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7191 else if (strlencmp(cmd, "unmute") == 0) 7192 new_mute = 0; 7193 else 7194 return -EINVAL; 7195 } 7196 7197 if (tp_features.mixer_no_level_control) { 7198 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7199 new_mute ? "" : "un"); 7200 rc = volume_set_mute(!!new_mute); 7201 } else { 7202 tpacpi_disclose_usertask("procfs volume", 7203 "%smute and set level to %d\n", 7204 new_mute ? "" : "un", new_level); 7205 rc = volume_set_status(new_mute | new_level); 7206 } 7207 volume_alsa_notify_change(); 7208 7209 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7210 } 7211 7212 static struct ibm_struct volume_driver_data = { 7213 .name = "volume", 7214 .read = volume_read, 7215 .write = volume_write, 7216 .exit = volume_exit, 7217 .suspend = volume_suspend, 7218 .resume = volume_resume, 7219 .shutdown = volume_shutdown, 7220 }; 7221 7222 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7223 7224 #define alsa_card NULL 7225 7226 static void inline volume_alsa_notify_change(void) 7227 { 7228 } 7229 7230 static int __init volume_init(struct ibm_init_struct *iibm) 7231 { 7232 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7233 7234 return 1; 7235 } 7236 7237 static struct ibm_struct volume_driver_data = { 7238 .name = "volume", 7239 }; 7240 7241 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7242 7243 /************************************************************************* 7244 * Fan subdriver 7245 */ 7246 7247 /* 7248 * FAN ACCESS MODES 7249 * 7250 * TPACPI_FAN_RD_ACPI_GFAN: 7251 * ACPI GFAN method: returns fan level 7252 * 7253 * see TPACPI_FAN_WR_ACPI_SFAN 7254 * EC 0x2f (HFSP) not available if GFAN exists 7255 * 7256 * TPACPI_FAN_WR_ACPI_SFAN: 7257 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7258 * 7259 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7260 * it for writing. 7261 * 7262 * TPACPI_FAN_WR_TPEC: 7263 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7264 * Supported on almost all ThinkPads 7265 * 7266 * Fan speed changes of any sort (including those caused by the 7267 * disengaged mode) are usually done slowly by the firmware as the 7268 * maximum amount of fan duty cycle change per second seems to be 7269 * limited. 7270 * 7271 * Reading is not available if GFAN exists. 7272 * Writing is not available if SFAN exists. 7273 * 7274 * Bits 7275 * 7 automatic mode engaged; 7276 * (default operation mode of the ThinkPad) 7277 * fan level is ignored in this mode. 7278 * 6 full speed mode (takes precedence over bit 7); 7279 * not available on all thinkpads. May disable 7280 * the tachometer while the fan controller ramps up 7281 * the speed (which can take up to a few *minutes*). 7282 * Speeds up fan to 100% duty-cycle, which is far above 7283 * the standard RPM levels. It is not impossible that 7284 * it could cause hardware damage. 7285 * 5-3 unused in some models. Extra bits for fan level 7286 * in others, but still useless as all values above 7287 * 7 map to the same speed as level 7 in these models. 7288 * 2-0 fan level (0..7 usually) 7289 * 0x00 = stop 7290 * 0x07 = max (set when temperatures critical) 7291 * Some ThinkPads may have other levels, see 7292 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7293 * 7294 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7295 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7296 * does so, its initial value is meaningless (0x07). 7297 * 7298 * For firmware bugs, refer to: 7299 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7300 * 7301 * ---- 7302 * 7303 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7304 * Main fan tachometer reading (in RPM) 7305 * 7306 * This register is present on all ThinkPads with a new-style EC, and 7307 * it is known not to be present on the A21m/e, and T22, as there is 7308 * something else in offset 0x84 according to the ACPI DSDT. Other 7309 * ThinkPads from this same time period (and earlier) probably lack the 7310 * tachometer as well. 7311 * 7312 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7313 * was never fixed by IBM to report the EC firmware version string 7314 * probably support the tachometer (like the early X models), so 7315 * detecting it is quite hard. We need more data to know for sure. 7316 * 7317 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7318 * might result. 7319 * 7320 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7321 * mode. 7322 * 7323 * For firmware bugs, refer to: 7324 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7325 * 7326 * ---- 7327 * 7328 * ThinkPad EC register 0x31 bit 0 (only on select models) 7329 * 7330 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7331 * show the speed of the main fan. When bit 0 of EC register 0x31 7332 * is one, the tachometer registers show the speed of the auxiliary 7333 * fan. 7334 * 7335 * Fan control seems to affect both fans, regardless of the state 7336 * of this bit. 7337 * 7338 * So far, only the firmware for the X60/X61 non-tablet versions 7339 * seem to support this (firmware TP-7M). 7340 * 7341 * TPACPI_FAN_WR_ACPI_FANS: 7342 * ThinkPad X31, X40, X41. Not available in the X60. 7343 * 7344 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7345 * high speed. ACPI DSDT seems to map these three speeds to levels 7346 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7347 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7348 * 7349 * The speeds are stored on handles 7350 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7351 * 7352 * There are three default speed sets, accessible as handles: 7353 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7354 * 7355 * ACPI DSDT switches which set is in use depending on various 7356 * factors. 7357 * 7358 * TPACPI_FAN_WR_TPEC is also available and should be used to 7359 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7360 * but the ACPI tables just mention level 7. 7361 */ 7362 7363 enum { /* Fan control constants */ 7364 fan_status_offset = 0x2f, /* EC register 0x2f */ 7365 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7366 * 0x84 must be read before 0x85 */ 7367 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7368 bit 0 selects which fan is active */ 7369 7370 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7371 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7372 7373 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7374 }; 7375 7376 enum fan_status_access_mode { 7377 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7378 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7379 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7380 }; 7381 7382 enum fan_control_access_mode { 7383 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7384 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7385 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7386 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7387 }; 7388 7389 enum fan_control_commands { 7390 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7391 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7392 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7393 * and also watchdog cmd */ 7394 }; 7395 7396 static bool fan_control_allowed; 7397 7398 static enum fan_status_access_mode fan_status_access_mode; 7399 static enum fan_control_access_mode fan_control_access_mode; 7400 static enum fan_control_commands fan_control_commands; 7401 7402 static u8 fan_control_initial_status; 7403 static u8 fan_control_desired_level; 7404 static u8 fan_control_resume_level; 7405 static int fan_watchdog_maxinterval; 7406 7407 static struct mutex fan_mutex; 7408 7409 static void fan_watchdog_fire(struct work_struct *ignored); 7410 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7411 7412 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7413 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7414 "\\FSPD", /* 600e/x, 770e, 770x */ 7415 ); /* all others */ 7416 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7417 "JFNS", /* 770x-JL */ 7418 ); /* all others */ 7419 7420 /* 7421 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7422 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7423 * be in auto mode (0x80). 7424 * 7425 * This is corrected by any write to HFSP either by the driver, or 7426 * by the firmware. 7427 * 7428 * We assume 0x07 really means auto mode while this quirk is active, 7429 * as this is far more likely than the ThinkPad being in level 7, 7430 * which is only used by the firmware during thermal emergencies. 7431 * 7432 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7433 * TP-70 (T43, R52), which are known to be buggy. 7434 */ 7435 7436 static void fan_quirk1_setup(void) 7437 { 7438 if (fan_control_initial_status == 0x07) { 7439 pr_notice("fan_init: initial fan status is unknown, " 7440 "assuming it is in auto mode\n"); 7441 tp_features.fan_ctrl_status_undef = 1; 7442 } 7443 } 7444 7445 static void fan_quirk1_handle(u8 *fan_status) 7446 { 7447 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7448 if (*fan_status != fan_control_initial_status) { 7449 /* something changed the HFSP regisnter since 7450 * driver init time, so it is not undefined 7451 * anymore */ 7452 tp_features.fan_ctrl_status_undef = 0; 7453 } else { 7454 /* Return most likely status. In fact, it 7455 * might be the only possible status */ 7456 *fan_status = TP_EC_FAN_AUTO; 7457 } 7458 } 7459 } 7460 7461 /* Select main fan on X60/X61, NOOP on others */ 7462 static bool fan_select_fan1(void) 7463 { 7464 if (tp_features.second_fan) { 7465 u8 val; 7466 7467 if (ec_read(fan_select_offset, &val) < 0) 7468 return false; 7469 val &= 0xFEU; 7470 if (ec_write(fan_select_offset, val) < 0) 7471 return false; 7472 } 7473 return true; 7474 } 7475 7476 /* Select secondary fan on X60/X61 */ 7477 static bool fan_select_fan2(void) 7478 { 7479 u8 val; 7480 7481 if (!tp_features.second_fan) 7482 return false; 7483 7484 if (ec_read(fan_select_offset, &val) < 0) 7485 return false; 7486 val |= 0x01U; 7487 if (ec_write(fan_select_offset, val) < 0) 7488 return false; 7489 7490 return true; 7491 } 7492 7493 /* 7494 * Call with fan_mutex held 7495 */ 7496 static void fan_update_desired_level(u8 status) 7497 { 7498 if ((status & 7499 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7500 if (status > 7) 7501 fan_control_desired_level = 7; 7502 else 7503 fan_control_desired_level = status; 7504 } 7505 } 7506 7507 static int fan_get_status(u8 *status) 7508 { 7509 u8 s; 7510 7511 /* TODO: 7512 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 7513 7514 switch (fan_status_access_mode) { 7515 case TPACPI_FAN_RD_ACPI_GFAN: { 7516 /* 570, 600e/x, 770e, 770x */ 7517 int res; 7518 7519 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 7520 return -EIO; 7521 7522 if (likely(status)) 7523 *status = res & 0x07; 7524 7525 break; 7526 } 7527 case TPACPI_FAN_RD_TPEC: 7528 /* all except 570, 600e/x, 770e, 770x */ 7529 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 7530 return -EIO; 7531 7532 if (likely(status)) { 7533 *status = s; 7534 fan_quirk1_handle(status); 7535 } 7536 7537 break; 7538 7539 default: 7540 return -ENXIO; 7541 } 7542 7543 return 0; 7544 } 7545 7546 static int fan_get_status_safe(u8 *status) 7547 { 7548 int rc; 7549 u8 s; 7550 7551 if (mutex_lock_killable(&fan_mutex)) 7552 return -ERESTARTSYS; 7553 rc = fan_get_status(&s); 7554 if (!rc) 7555 fan_update_desired_level(s); 7556 mutex_unlock(&fan_mutex); 7557 7558 if (status) 7559 *status = s; 7560 7561 return rc; 7562 } 7563 7564 static int fan_get_speed(unsigned int *speed) 7565 { 7566 u8 hi, lo; 7567 7568 switch (fan_status_access_mode) { 7569 case TPACPI_FAN_RD_TPEC: 7570 /* all except 570, 600e/x, 770e, 770x */ 7571 if (unlikely(!fan_select_fan1())) 7572 return -EIO; 7573 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 7574 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 7575 return -EIO; 7576 7577 if (likely(speed)) 7578 *speed = (hi << 8) | lo; 7579 7580 break; 7581 7582 default: 7583 return -ENXIO; 7584 } 7585 7586 return 0; 7587 } 7588 7589 static int fan2_get_speed(unsigned int *speed) 7590 { 7591 u8 hi, lo; 7592 bool rc; 7593 7594 switch (fan_status_access_mode) { 7595 case TPACPI_FAN_RD_TPEC: 7596 /* all except 570, 600e/x, 770e, 770x */ 7597 if (unlikely(!fan_select_fan2())) 7598 return -EIO; 7599 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 7600 !acpi_ec_read(fan_rpm_offset + 1, &hi); 7601 fan_select_fan1(); /* play it safe */ 7602 if (rc) 7603 return -EIO; 7604 7605 if (likely(speed)) 7606 *speed = (hi << 8) | lo; 7607 7608 break; 7609 7610 default: 7611 return -ENXIO; 7612 } 7613 7614 return 0; 7615 } 7616 7617 static int fan_set_level(int level) 7618 { 7619 if (!fan_control_allowed) 7620 return -EPERM; 7621 7622 switch (fan_control_access_mode) { 7623 case TPACPI_FAN_WR_ACPI_SFAN: 7624 if (level >= 0 && level <= 7) { 7625 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 7626 return -EIO; 7627 } else 7628 return -EINVAL; 7629 break; 7630 7631 case TPACPI_FAN_WR_ACPI_FANS: 7632 case TPACPI_FAN_WR_TPEC: 7633 if (!(level & TP_EC_FAN_AUTO) && 7634 !(level & TP_EC_FAN_FULLSPEED) && 7635 ((level < 0) || (level > 7))) 7636 return -EINVAL; 7637 7638 /* safety net should the EC not support AUTO 7639 * or FULLSPEED mode bits and just ignore them */ 7640 if (level & TP_EC_FAN_FULLSPEED) 7641 level |= 7; /* safety min speed 7 */ 7642 else if (level & TP_EC_FAN_AUTO) 7643 level |= 4; /* safety min speed 4 */ 7644 7645 if (!acpi_ec_write(fan_status_offset, level)) 7646 return -EIO; 7647 else 7648 tp_features.fan_ctrl_status_undef = 0; 7649 break; 7650 7651 default: 7652 return -ENXIO; 7653 } 7654 7655 vdbg_printk(TPACPI_DBG_FAN, 7656 "fan control: set fan control register to 0x%02x\n", level); 7657 return 0; 7658 } 7659 7660 static int fan_set_level_safe(int level) 7661 { 7662 int rc; 7663 7664 if (!fan_control_allowed) 7665 return -EPERM; 7666 7667 if (mutex_lock_killable(&fan_mutex)) 7668 return -ERESTARTSYS; 7669 7670 if (level == TPACPI_FAN_LAST_LEVEL) 7671 level = fan_control_desired_level; 7672 7673 rc = fan_set_level(level); 7674 if (!rc) 7675 fan_update_desired_level(level); 7676 7677 mutex_unlock(&fan_mutex); 7678 return rc; 7679 } 7680 7681 static int fan_set_enable(void) 7682 { 7683 u8 s; 7684 int rc; 7685 7686 if (!fan_control_allowed) 7687 return -EPERM; 7688 7689 if (mutex_lock_killable(&fan_mutex)) 7690 return -ERESTARTSYS; 7691 7692 switch (fan_control_access_mode) { 7693 case TPACPI_FAN_WR_ACPI_FANS: 7694 case TPACPI_FAN_WR_TPEC: 7695 rc = fan_get_status(&s); 7696 if (rc < 0) 7697 break; 7698 7699 /* Don't go out of emergency fan mode */ 7700 if (s != 7) { 7701 s &= 0x07; 7702 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 7703 } 7704 7705 if (!acpi_ec_write(fan_status_offset, s)) 7706 rc = -EIO; 7707 else { 7708 tp_features.fan_ctrl_status_undef = 0; 7709 rc = 0; 7710 } 7711 break; 7712 7713 case TPACPI_FAN_WR_ACPI_SFAN: 7714 rc = fan_get_status(&s); 7715 if (rc < 0) 7716 break; 7717 7718 s &= 0x07; 7719 7720 /* Set fan to at least level 4 */ 7721 s |= 4; 7722 7723 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 7724 rc = -EIO; 7725 else 7726 rc = 0; 7727 break; 7728 7729 default: 7730 rc = -ENXIO; 7731 } 7732 7733 mutex_unlock(&fan_mutex); 7734 7735 if (!rc) 7736 vdbg_printk(TPACPI_DBG_FAN, 7737 "fan control: set fan control register to 0x%02x\n", 7738 s); 7739 return rc; 7740 } 7741 7742 static int fan_set_disable(void) 7743 { 7744 int rc; 7745 7746 if (!fan_control_allowed) 7747 return -EPERM; 7748 7749 if (mutex_lock_killable(&fan_mutex)) 7750 return -ERESTARTSYS; 7751 7752 rc = 0; 7753 switch (fan_control_access_mode) { 7754 case TPACPI_FAN_WR_ACPI_FANS: 7755 case TPACPI_FAN_WR_TPEC: 7756 if (!acpi_ec_write(fan_status_offset, 0x00)) 7757 rc = -EIO; 7758 else { 7759 fan_control_desired_level = 0; 7760 tp_features.fan_ctrl_status_undef = 0; 7761 } 7762 break; 7763 7764 case TPACPI_FAN_WR_ACPI_SFAN: 7765 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 7766 rc = -EIO; 7767 else 7768 fan_control_desired_level = 0; 7769 break; 7770 7771 default: 7772 rc = -ENXIO; 7773 } 7774 7775 if (!rc) 7776 vdbg_printk(TPACPI_DBG_FAN, 7777 "fan control: set fan control register to 0\n"); 7778 7779 mutex_unlock(&fan_mutex); 7780 return rc; 7781 } 7782 7783 static int fan_set_speed(int speed) 7784 { 7785 int rc; 7786 7787 if (!fan_control_allowed) 7788 return -EPERM; 7789 7790 if (mutex_lock_killable(&fan_mutex)) 7791 return -ERESTARTSYS; 7792 7793 rc = 0; 7794 switch (fan_control_access_mode) { 7795 case TPACPI_FAN_WR_ACPI_FANS: 7796 if (speed >= 0 && speed <= 65535) { 7797 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 7798 speed, speed, speed)) 7799 rc = -EIO; 7800 } else 7801 rc = -EINVAL; 7802 break; 7803 7804 default: 7805 rc = -ENXIO; 7806 } 7807 7808 mutex_unlock(&fan_mutex); 7809 return rc; 7810 } 7811 7812 static void fan_watchdog_reset(void) 7813 { 7814 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 7815 return; 7816 7817 if (fan_watchdog_maxinterval > 0 && 7818 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 7819 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 7820 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 7821 else 7822 cancel_delayed_work(&fan_watchdog_task); 7823 } 7824 7825 static void fan_watchdog_fire(struct work_struct *ignored) 7826 { 7827 int rc; 7828 7829 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 7830 return; 7831 7832 pr_notice("fan watchdog: enabling fan\n"); 7833 rc = fan_set_enable(); 7834 if (rc < 0) { 7835 pr_err("fan watchdog: error %d while enabling fan, " 7836 "will try again later...\n", -rc); 7837 /* reschedule for later */ 7838 fan_watchdog_reset(); 7839 } 7840 } 7841 7842 /* 7843 * SYSFS fan layout: hwmon compatible (device) 7844 * 7845 * pwm*_enable: 7846 * 0: "disengaged" mode 7847 * 1: manual mode 7848 * 2: native EC "auto" mode (recommended, hardware default) 7849 * 7850 * pwm*: set speed in manual mode, ignored otherwise. 7851 * 0 is level 0; 255 is level 7. Intermediate points done with linear 7852 * interpolation. 7853 * 7854 * fan*_input: tachometer reading, RPM 7855 * 7856 * 7857 * SYSFS fan layout: extensions 7858 * 7859 * fan_watchdog (driver): 7860 * fan watchdog interval in seconds, 0 disables (default), max 120 7861 */ 7862 7863 /* sysfs fan pwm1_enable ----------------------------------------------- */ 7864 static ssize_t fan_pwm1_enable_show(struct device *dev, 7865 struct device_attribute *attr, 7866 char *buf) 7867 { 7868 int res, mode; 7869 u8 status; 7870 7871 res = fan_get_status_safe(&status); 7872 if (res) 7873 return res; 7874 7875 if (status & TP_EC_FAN_FULLSPEED) { 7876 mode = 0; 7877 } else if (status & TP_EC_FAN_AUTO) { 7878 mode = 2; 7879 } else 7880 mode = 1; 7881 7882 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 7883 } 7884 7885 static ssize_t fan_pwm1_enable_store(struct device *dev, 7886 struct device_attribute *attr, 7887 const char *buf, size_t count) 7888 { 7889 unsigned long t; 7890 int res, level; 7891 7892 if (parse_strtoul(buf, 2, &t)) 7893 return -EINVAL; 7894 7895 tpacpi_disclose_usertask("hwmon pwm1_enable", 7896 "set fan mode to %lu\n", t); 7897 7898 switch (t) { 7899 case 0: 7900 level = TP_EC_FAN_FULLSPEED; 7901 break; 7902 case 1: 7903 level = TPACPI_FAN_LAST_LEVEL; 7904 break; 7905 case 2: 7906 level = TP_EC_FAN_AUTO; 7907 break; 7908 case 3: 7909 /* reserved for software-controlled auto mode */ 7910 return -ENOSYS; 7911 default: 7912 return -EINVAL; 7913 } 7914 7915 res = fan_set_level_safe(level); 7916 if (res == -ENXIO) 7917 return -EINVAL; 7918 else if (res < 0) 7919 return res; 7920 7921 fan_watchdog_reset(); 7922 7923 return count; 7924 } 7925 7926 static struct device_attribute dev_attr_fan_pwm1_enable = 7927 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 7928 fan_pwm1_enable_show, fan_pwm1_enable_store); 7929 7930 /* sysfs fan pwm1 ------------------------------------------------------ */ 7931 static ssize_t fan_pwm1_show(struct device *dev, 7932 struct device_attribute *attr, 7933 char *buf) 7934 { 7935 int res; 7936 u8 status; 7937 7938 res = fan_get_status_safe(&status); 7939 if (res) 7940 return res; 7941 7942 if ((status & 7943 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 7944 status = fan_control_desired_level; 7945 7946 if (status > 7) 7947 status = 7; 7948 7949 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 7950 } 7951 7952 static ssize_t fan_pwm1_store(struct device *dev, 7953 struct device_attribute *attr, 7954 const char *buf, size_t count) 7955 { 7956 unsigned long s; 7957 int rc; 7958 u8 status, newlevel; 7959 7960 if (parse_strtoul(buf, 255, &s)) 7961 return -EINVAL; 7962 7963 tpacpi_disclose_usertask("hwmon pwm1", 7964 "set fan speed to %lu\n", s); 7965 7966 /* scale down from 0-255 to 0-7 */ 7967 newlevel = (s >> 5) & 0x07; 7968 7969 if (mutex_lock_killable(&fan_mutex)) 7970 return -ERESTARTSYS; 7971 7972 rc = fan_get_status(&status); 7973 if (!rc && (status & 7974 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7975 rc = fan_set_level(newlevel); 7976 if (rc == -ENXIO) 7977 rc = -EINVAL; 7978 else if (!rc) { 7979 fan_update_desired_level(newlevel); 7980 fan_watchdog_reset(); 7981 } 7982 } 7983 7984 mutex_unlock(&fan_mutex); 7985 return (rc)? rc : count; 7986 } 7987 7988 static struct device_attribute dev_attr_fan_pwm1 = 7989 __ATTR(pwm1, S_IWUSR | S_IRUGO, 7990 fan_pwm1_show, fan_pwm1_store); 7991 7992 /* sysfs fan fan1_input ------------------------------------------------ */ 7993 static ssize_t fan_fan1_input_show(struct device *dev, 7994 struct device_attribute *attr, 7995 char *buf) 7996 { 7997 int res; 7998 unsigned int speed; 7999 8000 res = fan_get_speed(&speed); 8001 if (res < 0) 8002 return res; 8003 8004 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8005 } 8006 8007 static struct device_attribute dev_attr_fan_fan1_input = 8008 __ATTR(fan1_input, S_IRUGO, 8009 fan_fan1_input_show, NULL); 8010 8011 /* sysfs fan fan2_input ------------------------------------------------ */ 8012 static ssize_t fan_fan2_input_show(struct device *dev, 8013 struct device_attribute *attr, 8014 char *buf) 8015 { 8016 int res; 8017 unsigned int speed; 8018 8019 res = fan2_get_speed(&speed); 8020 if (res < 0) 8021 return res; 8022 8023 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8024 } 8025 8026 static struct device_attribute dev_attr_fan_fan2_input = 8027 __ATTR(fan2_input, S_IRUGO, 8028 fan_fan2_input_show, NULL); 8029 8030 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8031 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 8032 char *buf) 8033 { 8034 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8035 } 8036 8037 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 8038 const char *buf, size_t count) 8039 { 8040 unsigned long t; 8041 8042 if (parse_strtoul(buf, 120, &t)) 8043 return -EINVAL; 8044 8045 if (!fan_control_allowed) 8046 return -EPERM; 8047 8048 fan_watchdog_maxinterval = t; 8049 fan_watchdog_reset(); 8050 8051 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8052 8053 return count; 8054 } 8055 8056 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 8057 fan_fan_watchdog_show, fan_fan_watchdog_store); 8058 8059 /* --------------------------------------------------------------------- */ 8060 static struct attribute *fan_attributes[] = { 8061 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr, 8062 &dev_attr_fan_fan1_input.attr, 8063 NULL, /* for fan2_input */ 8064 NULL 8065 }; 8066 8067 static const struct attribute_group fan_attr_group = { 8068 .attrs = fan_attributes, 8069 }; 8070 8071 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8072 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8073 8074 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 8075 { .vendor = PCI_VENDOR_ID_IBM, \ 8076 .bios = TPACPI_MATCH_ANY, \ 8077 .ec = TPID(__id1, __id2), \ 8078 .quirks = __quirks } 8079 8080 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 8081 { .vendor = PCI_VENDOR_ID_LENOVO, \ 8082 .bios = TPACPI_MATCH_ANY, \ 8083 .ec = TPID(__id1, __id2), \ 8084 .quirks = __quirks } 8085 8086 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8087 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 8088 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 8089 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 8090 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 8091 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 8092 }; 8093 8094 #undef TPACPI_FAN_QL 8095 #undef TPACPI_FAN_QI 8096 8097 static int __init fan_init(struct ibm_init_struct *iibm) 8098 { 8099 int rc; 8100 unsigned long quirks; 8101 8102 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8103 "initializing fan subdriver\n"); 8104 8105 mutex_init(&fan_mutex); 8106 fan_status_access_mode = TPACPI_FAN_NONE; 8107 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8108 fan_control_commands = 0; 8109 fan_watchdog_maxinterval = 0; 8110 tp_features.fan_ctrl_status_undef = 0; 8111 tp_features.second_fan = 0; 8112 fan_control_desired_level = 7; 8113 8114 if (tpacpi_is_ibm()) { 8115 TPACPI_ACPIHANDLE_INIT(fans); 8116 TPACPI_ACPIHANDLE_INIT(gfan); 8117 TPACPI_ACPIHANDLE_INIT(sfan); 8118 } 8119 8120 quirks = tpacpi_check_quirks(fan_quirk_table, 8121 ARRAY_SIZE(fan_quirk_table)); 8122 8123 if (gfan_handle) { 8124 /* 570, 600e/x, 770e, 770x */ 8125 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8126 } else { 8127 /* all other ThinkPads: note that even old-style 8128 * ThinkPad ECs supports the fan control register */ 8129 if (likely(acpi_ec_read(fan_status_offset, 8130 &fan_control_initial_status))) { 8131 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8132 if (quirks & TPACPI_FAN_Q1) 8133 fan_quirk1_setup(); 8134 if (quirks & TPACPI_FAN_2FAN) { 8135 tp_features.second_fan = 1; 8136 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8137 "secondary fan support enabled\n"); 8138 } 8139 } else { 8140 pr_err("ThinkPad ACPI EC access misbehaving, " 8141 "fan status and control unavailable\n"); 8142 return 1; 8143 } 8144 } 8145 8146 if (sfan_handle) { 8147 /* 570, 770x-JL */ 8148 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8149 fan_control_commands |= 8150 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8151 } else { 8152 if (!gfan_handle) { 8153 /* gfan without sfan means no fan control */ 8154 /* all other models implement TP EC 0x2f control */ 8155 8156 if (fans_handle) { 8157 /* X31, X40, X41 */ 8158 fan_control_access_mode = 8159 TPACPI_FAN_WR_ACPI_FANS; 8160 fan_control_commands |= 8161 TPACPI_FAN_CMD_SPEED | 8162 TPACPI_FAN_CMD_LEVEL | 8163 TPACPI_FAN_CMD_ENABLE; 8164 } else { 8165 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8166 fan_control_commands |= 8167 TPACPI_FAN_CMD_LEVEL | 8168 TPACPI_FAN_CMD_ENABLE; 8169 } 8170 } 8171 } 8172 8173 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8174 "fan is %s, modes %d, %d\n", 8175 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8176 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8177 fan_status_access_mode, fan_control_access_mode); 8178 8179 /* fan control master switch */ 8180 if (!fan_control_allowed) { 8181 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8182 fan_control_commands = 0; 8183 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8184 "fan control features disabled by parameter\n"); 8185 } 8186 8187 /* update fan_control_desired_level */ 8188 if (fan_status_access_mode != TPACPI_FAN_NONE) 8189 fan_get_status_safe(NULL); 8190 8191 if (fan_status_access_mode != TPACPI_FAN_NONE || 8192 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8193 if (tp_features.second_fan) { 8194 /* attach second fan tachometer */ 8195 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8196 &dev_attr_fan_fan2_input.attr; 8197 } 8198 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8199 &fan_attr_group); 8200 if (rc < 0) 8201 return rc; 8202 8203 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8204 &driver_attr_fan_watchdog); 8205 if (rc < 0) { 8206 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8207 &fan_attr_group); 8208 return rc; 8209 } 8210 return 0; 8211 } else 8212 return 1; 8213 } 8214 8215 static void fan_exit(void) 8216 { 8217 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8218 "cancelling any pending fan watchdog tasks\n"); 8219 8220 /* FIXME: can we really do this unconditionally? */ 8221 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8222 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8223 &driver_attr_fan_watchdog); 8224 8225 cancel_delayed_work(&fan_watchdog_task); 8226 flush_workqueue(tpacpi_wq); 8227 } 8228 8229 static void fan_suspend(void) 8230 { 8231 int rc; 8232 8233 if (!fan_control_allowed) 8234 return; 8235 8236 /* Store fan status in cache */ 8237 fan_control_resume_level = 0; 8238 rc = fan_get_status_safe(&fan_control_resume_level); 8239 if (rc < 0) 8240 pr_notice("failed to read fan level for later " 8241 "restore during resume: %d\n", rc); 8242 8243 /* if it is undefined, don't attempt to restore it. 8244 * KEEP THIS LAST */ 8245 if (tp_features.fan_ctrl_status_undef) 8246 fan_control_resume_level = 0; 8247 } 8248 8249 static void fan_resume(void) 8250 { 8251 u8 current_level = 7; 8252 bool do_set = false; 8253 int rc; 8254 8255 /* DSDT *always* updates status on resume */ 8256 tp_features.fan_ctrl_status_undef = 0; 8257 8258 if (!fan_control_allowed || 8259 !fan_control_resume_level || 8260 (fan_get_status_safe(¤t_level) < 0)) 8261 return; 8262 8263 switch (fan_control_access_mode) { 8264 case TPACPI_FAN_WR_ACPI_SFAN: 8265 /* never decrease fan level */ 8266 do_set = (fan_control_resume_level > current_level); 8267 break; 8268 case TPACPI_FAN_WR_ACPI_FANS: 8269 case TPACPI_FAN_WR_TPEC: 8270 /* never decrease fan level, scale is: 8271 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8272 * 8273 * We expect the firmware to set either 7 or AUTO, but we 8274 * handle FULLSPEED out of paranoia. 8275 * 8276 * So, we can safely only restore FULLSPEED or 7, anything 8277 * else could slow the fan. Restoring AUTO is useless, at 8278 * best that's exactly what the DSDT already set (it is the 8279 * slower it uses). 8280 * 8281 * Always keep in mind that the DSDT *will* have set the 8282 * fans to what the vendor supposes is the best level. We 8283 * muck with it only to speed the fan up. 8284 */ 8285 if (fan_control_resume_level != 7 && 8286 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8287 return; 8288 else 8289 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8290 (current_level != fan_control_resume_level); 8291 break; 8292 default: 8293 return; 8294 } 8295 if (do_set) { 8296 pr_notice("restoring fan level to 0x%02x\n", 8297 fan_control_resume_level); 8298 rc = fan_set_level_safe(fan_control_resume_level); 8299 if (rc < 0) 8300 pr_notice("failed to restore fan level: %d\n", rc); 8301 } 8302 } 8303 8304 static int fan_read(struct seq_file *m) 8305 { 8306 int rc; 8307 u8 status; 8308 unsigned int speed = 0; 8309 8310 switch (fan_status_access_mode) { 8311 case TPACPI_FAN_RD_ACPI_GFAN: 8312 /* 570, 600e/x, 770e, 770x */ 8313 rc = fan_get_status_safe(&status); 8314 if (rc < 0) 8315 return rc; 8316 8317 seq_printf(m, "status:\t\t%s\n" 8318 "level:\t\t%d\n", 8319 (status != 0) ? "enabled" : "disabled", status); 8320 break; 8321 8322 case TPACPI_FAN_RD_TPEC: 8323 /* all except 570, 600e/x, 770e, 770x */ 8324 rc = fan_get_status_safe(&status); 8325 if (rc < 0) 8326 return rc; 8327 8328 seq_printf(m, "status:\t\t%s\n", 8329 (status != 0) ? "enabled" : "disabled"); 8330 8331 rc = fan_get_speed(&speed); 8332 if (rc < 0) 8333 return rc; 8334 8335 seq_printf(m, "speed:\t\t%d\n", speed); 8336 8337 if (status & TP_EC_FAN_FULLSPEED) 8338 /* Disengaged mode takes precedence */ 8339 seq_printf(m, "level:\t\tdisengaged\n"); 8340 else if (status & TP_EC_FAN_AUTO) 8341 seq_printf(m, "level:\t\tauto\n"); 8342 else 8343 seq_printf(m, "level:\t\t%d\n", status); 8344 break; 8345 8346 case TPACPI_FAN_NONE: 8347 default: 8348 seq_printf(m, "status:\t\tnot supported\n"); 8349 } 8350 8351 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8352 seq_printf(m, "commands:\tlevel <level>"); 8353 8354 switch (fan_control_access_mode) { 8355 case TPACPI_FAN_WR_ACPI_SFAN: 8356 seq_printf(m, " (<level> is 0-7)\n"); 8357 break; 8358 8359 default: 8360 seq_printf(m, " (<level> is 0-7, " 8361 "auto, disengaged, full-speed)\n"); 8362 break; 8363 } 8364 } 8365 8366 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8367 seq_printf(m, "commands:\tenable, disable\n" 8368 "commands:\twatchdog <timeout> (<timeout> " 8369 "is 0 (off), 1-120 (seconds))\n"); 8370 8371 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8372 seq_printf(m, "commands:\tspeed <speed>" 8373 " (<speed> is 0-65535)\n"); 8374 8375 return 0; 8376 } 8377 8378 static int fan_write_cmd_level(const char *cmd, int *rc) 8379 { 8380 int level; 8381 8382 if (strlencmp(cmd, "level auto") == 0) 8383 level = TP_EC_FAN_AUTO; 8384 else if ((strlencmp(cmd, "level disengaged") == 0) | 8385 (strlencmp(cmd, "level full-speed") == 0)) 8386 level = TP_EC_FAN_FULLSPEED; 8387 else if (sscanf(cmd, "level %d", &level) != 1) 8388 return 0; 8389 8390 *rc = fan_set_level_safe(level); 8391 if (*rc == -ENXIO) 8392 pr_err("level command accepted for unsupported access mode %d\n", 8393 fan_control_access_mode); 8394 else if (!*rc) 8395 tpacpi_disclose_usertask("procfs fan", 8396 "set level to %d\n", level); 8397 8398 return 1; 8399 } 8400 8401 static int fan_write_cmd_enable(const char *cmd, int *rc) 8402 { 8403 if (strlencmp(cmd, "enable") != 0) 8404 return 0; 8405 8406 *rc = fan_set_enable(); 8407 if (*rc == -ENXIO) 8408 pr_err("enable command accepted for unsupported access mode %d\n", 8409 fan_control_access_mode); 8410 else if (!*rc) 8411 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8412 8413 return 1; 8414 } 8415 8416 static int fan_write_cmd_disable(const char *cmd, int *rc) 8417 { 8418 if (strlencmp(cmd, "disable") != 0) 8419 return 0; 8420 8421 *rc = fan_set_disable(); 8422 if (*rc == -ENXIO) 8423 pr_err("disable command accepted for unsupported access mode %d\n", 8424 fan_control_access_mode); 8425 else if (!*rc) 8426 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8427 8428 return 1; 8429 } 8430 8431 static int fan_write_cmd_speed(const char *cmd, int *rc) 8432 { 8433 int speed; 8434 8435 /* TODO: 8436 * Support speed <low> <medium> <high> ? */ 8437 8438 if (sscanf(cmd, "speed %d", &speed) != 1) 8439 return 0; 8440 8441 *rc = fan_set_speed(speed); 8442 if (*rc == -ENXIO) 8443 pr_err("speed command accepted for unsupported access mode %d\n", 8444 fan_control_access_mode); 8445 else if (!*rc) 8446 tpacpi_disclose_usertask("procfs fan", 8447 "set speed to %d\n", speed); 8448 8449 return 1; 8450 } 8451 8452 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8453 { 8454 int interval; 8455 8456 if (sscanf(cmd, "watchdog %d", &interval) != 1) 8457 return 0; 8458 8459 if (interval < 0 || interval > 120) 8460 *rc = -EINVAL; 8461 else { 8462 fan_watchdog_maxinterval = interval; 8463 tpacpi_disclose_usertask("procfs fan", 8464 "set watchdog timer to %d\n", 8465 interval); 8466 } 8467 8468 return 1; 8469 } 8470 8471 static int fan_write(char *buf) 8472 { 8473 char *cmd; 8474 int rc = 0; 8475 8476 while (!rc && (cmd = next_cmd(&buf))) { 8477 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 8478 fan_write_cmd_level(cmd, &rc)) && 8479 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 8480 (fan_write_cmd_enable(cmd, &rc) || 8481 fan_write_cmd_disable(cmd, &rc) || 8482 fan_write_cmd_watchdog(cmd, &rc))) && 8483 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 8484 fan_write_cmd_speed(cmd, &rc)) 8485 ) 8486 rc = -EINVAL; 8487 else if (!rc) 8488 fan_watchdog_reset(); 8489 } 8490 8491 return rc; 8492 } 8493 8494 static struct ibm_struct fan_driver_data = { 8495 .name = "fan", 8496 .read = fan_read, 8497 .write = fan_write, 8498 .exit = fan_exit, 8499 .suspend = fan_suspend, 8500 .resume = fan_resume, 8501 }; 8502 8503 /************************************************************************* 8504 * Mute LED subdriver 8505 */ 8506 8507 8508 struct tp_led_table { 8509 acpi_string name; 8510 int on_value; 8511 int off_value; 8512 int state; 8513 }; 8514 8515 static struct tp_led_table led_tables[] = { 8516 [TPACPI_LED_MUTE] = { 8517 .name = "SSMS", 8518 .on_value = 1, 8519 .off_value = 0, 8520 }, 8521 [TPACPI_LED_MICMUTE] = { 8522 .name = "MMTS", 8523 .on_value = 2, 8524 .off_value = 0, 8525 }, 8526 }; 8527 8528 static int mute_led_on_off(struct tp_led_table *t, bool state) 8529 { 8530 acpi_handle temp; 8531 int output; 8532 8533 if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) { 8534 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 8535 return -EIO; 8536 } 8537 8538 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 8539 state ? t->on_value : t->off_value)) 8540 return -EIO; 8541 8542 t->state = state; 8543 return state; 8544 } 8545 8546 int tpacpi_led_set(int whichled, bool on) 8547 { 8548 struct tp_led_table *t; 8549 8550 if (whichled < 0 || whichled >= TPACPI_LED_MAX) 8551 return -EINVAL; 8552 8553 t = &led_tables[whichled]; 8554 if (t->state < 0 || t->state == on) 8555 return t->state; 8556 return mute_led_on_off(t, on); 8557 } 8558 EXPORT_SYMBOL_GPL(tpacpi_led_set); 8559 8560 static int mute_led_init(struct ibm_init_struct *iibm) 8561 { 8562 acpi_handle temp; 8563 int i; 8564 8565 for (i = 0; i < TPACPI_LED_MAX; i++) { 8566 struct tp_led_table *t = &led_tables[i]; 8567 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) 8568 mute_led_on_off(t, false); 8569 else 8570 t->state = -ENODEV; 8571 } 8572 return 0; 8573 } 8574 8575 static void mute_led_exit(void) 8576 { 8577 int i; 8578 8579 for (i = 0; i < TPACPI_LED_MAX; i++) 8580 tpacpi_led_set(i, false); 8581 } 8582 8583 static void mute_led_resume(void) 8584 { 8585 int i; 8586 8587 for (i = 0; i < TPACPI_LED_MAX; i++) { 8588 struct tp_led_table *t = &led_tables[i]; 8589 if (t->state >= 0) 8590 mute_led_on_off(t, t->state); 8591 } 8592 } 8593 8594 static struct ibm_struct mute_led_driver_data = { 8595 .name = "mute_led", 8596 .exit = mute_led_exit, 8597 .resume = mute_led_resume, 8598 }; 8599 8600 /**************************************************************************** 8601 **************************************************************************** 8602 * 8603 * Infrastructure 8604 * 8605 **************************************************************************** 8606 ****************************************************************************/ 8607 8608 /* 8609 * HKEY event callout for other subdrivers go here 8610 * (yes, it is ugly, but it is quick, safe, and gets the job done 8611 */ 8612 static void tpacpi_driver_event(const unsigned int hkey_event) 8613 { 8614 if (ibm_backlight_device) { 8615 switch (hkey_event) { 8616 case TP_HKEY_EV_BRGHT_UP: 8617 case TP_HKEY_EV_BRGHT_DOWN: 8618 tpacpi_brightness_notify_change(); 8619 } 8620 } 8621 if (alsa_card) { 8622 switch (hkey_event) { 8623 case TP_HKEY_EV_VOL_UP: 8624 case TP_HKEY_EV_VOL_DOWN: 8625 case TP_HKEY_EV_VOL_MUTE: 8626 volume_alsa_notify_change(); 8627 } 8628 } 8629 } 8630 8631 static void hotkey_driver_event(const unsigned int scancode) 8632 { 8633 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 8634 } 8635 8636 /* sysfs name ---------------------------------------------------------- */ 8637 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 8638 struct device_attribute *attr, 8639 char *buf) 8640 { 8641 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 8642 } 8643 8644 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name = 8645 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 8646 8647 /* --------------------------------------------------------------------- */ 8648 8649 /* /proc support */ 8650 static struct proc_dir_entry *proc_dir; 8651 8652 /* 8653 * Module and infrastructure proble, init and exit handling 8654 */ 8655 8656 static bool force_load; 8657 8658 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 8659 static const char * __init str_supported(int is_supported) 8660 { 8661 static char text_unsupported[] __initdata = "not supported"; 8662 8663 return (is_supported)? &text_unsupported[4] : &text_unsupported[0]; 8664 } 8665 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 8666 8667 static void ibm_exit(struct ibm_struct *ibm) 8668 { 8669 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 8670 8671 list_del_init(&ibm->all_drivers); 8672 8673 if (ibm->flags.acpi_notify_installed) { 8674 dbg_printk(TPACPI_DBG_EXIT, 8675 "%s: acpi_remove_notify_handler\n", ibm->name); 8676 BUG_ON(!ibm->acpi); 8677 acpi_remove_notify_handler(*ibm->acpi->handle, 8678 ibm->acpi->type, 8679 dispatch_acpi_notify); 8680 ibm->flags.acpi_notify_installed = 0; 8681 } 8682 8683 if (ibm->flags.proc_created) { 8684 dbg_printk(TPACPI_DBG_EXIT, 8685 "%s: remove_proc_entry\n", ibm->name); 8686 remove_proc_entry(ibm->name, proc_dir); 8687 ibm->flags.proc_created = 0; 8688 } 8689 8690 if (ibm->flags.acpi_driver_registered) { 8691 dbg_printk(TPACPI_DBG_EXIT, 8692 "%s: acpi_bus_unregister_driver\n", ibm->name); 8693 BUG_ON(!ibm->acpi); 8694 acpi_bus_unregister_driver(ibm->acpi->driver); 8695 kfree(ibm->acpi->driver); 8696 ibm->acpi->driver = NULL; 8697 ibm->flags.acpi_driver_registered = 0; 8698 } 8699 8700 if (ibm->flags.init_called && ibm->exit) { 8701 ibm->exit(); 8702 ibm->flags.init_called = 0; 8703 } 8704 8705 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 8706 } 8707 8708 static int __init ibm_init(struct ibm_init_struct *iibm) 8709 { 8710 int ret; 8711 struct ibm_struct *ibm = iibm->data; 8712 struct proc_dir_entry *entry; 8713 8714 BUG_ON(ibm == NULL); 8715 8716 INIT_LIST_HEAD(&ibm->all_drivers); 8717 8718 if (ibm->flags.experimental && !experimental) 8719 return 0; 8720 8721 dbg_printk(TPACPI_DBG_INIT, 8722 "probing for %s\n", ibm->name); 8723 8724 if (iibm->init) { 8725 ret = iibm->init(iibm); 8726 if (ret > 0) 8727 return 0; /* probe failed */ 8728 if (ret) 8729 return ret; 8730 8731 ibm->flags.init_called = 1; 8732 } 8733 8734 if (ibm->acpi) { 8735 if (ibm->acpi->hid) { 8736 ret = register_tpacpi_subdriver(ibm); 8737 if (ret) 8738 goto err_out; 8739 } 8740 8741 if (ibm->acpi->notify) { 8742 ret = setup_acpi_notify(ibm); 8743 if (ret == -ENODEV) { 8744 pr_notice("disabling subdriver %s\n", 8745 ibm->name); 8746 ret = 0; 8747 goto err_out; 8748 } 8749 if (ret < 0) 8750 goto err_out; 8751 } 8752 } 8753 8754 dbg_printk(TPACPI_DBG_INIT, 8755 "%s installed\n", ibm->name); 8756 8757 if (ibm->read) { 8758 umode_t mode = iibm->base_procfs_mode; 8759 8760 if (!mode) 8761 mode = S_IRUGO; 8762 if (ibm->write) 8763 mode |= S_IWUSR; 8764 entry = proc_create_data(ibm->name, mode, proc_dir, 8765 &dispatch_proc_fops, ibm); 8766 if (!entry) { 8767 pr_err("unable to create proc entry %s\n", ibm->name); 8768 ret = -ENODEV; 8769 goto err_out; 8770 } 8771 ibm->flags.proc_created = 1; 8772 } 8773 8774 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 8775 8776 return 0; 8777 8778 err_out: 8779 dbg_printk(TPACPI_DBG_INIT, 8780 "%s: at error exit path with result %d\n", 8781 ibm->name, ret); 8782 8783 ibm_exit(ibm); 8784 return (ret < 0)? ret : 0; 8785 } 8786 8787 /* Probing */ 8788 8789 static bool __pure __init tpacpi_is_fw_digit(const char c) 8790 { 8791 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 8792 } 8793 8794 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */ 8795 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s, 8796 const char t) 8797 { 8798 return s && strlen(s) >= 8 && 8799 tpacpi_is_fw_digit(s[0]) && 8800 tpacpi_is_fw_digit(s[1]) && 8801 s[2] == t && 8802 (s[3] == 'T' || s[3] == 'N') && 8803 tpacpi_is_fw_digit(s[4]) && 8804 tpacpi_is_fw_digit(s[5]); 8805 } 8806 8807 /* returns 0 - probe ok, or < 0 - probe error. 8808 * Probe ok doesn't mean thinkpad found. 8809 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 8810 static int __must_check __init get_thinkpad_model_data( 8811 struct thinkpad_id_data *tp) 8812 { 8813 const struct dmi_device *dev = NULL; 8814 char ec_fw_string[18]; 8815 char const *s; 8816 8817 if (!tp) 8818 return -EINVAL; 8819 8820 memset(tp, 0, sizeof(*tp)); 8821 8822 if (dmi_name_in_vendors("IBM")) 8823 tp->vendor = PCI_VENDOR_ID_IBM; 8824 else if (dmi_name_in_vendors("LENOVO")) 8825 tp->vendor = PCI_VENDOR_ID_LENOVO; 8826 else 8827 return 0; 8828 8829 s = dmi_get_system_info(DMI_BIOS_VERSION); 8830 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 8831 if (s && !tp->bios_version_str) 8832 return -ENOMEM; 8833 8834 /* Really ancient ThinkPad 240X will fail this, which is fine */ 8835 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') || 8836 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C'))) 8837 return 0; 8838 8839 tp->bios_model = tp->bios_version_str[0] 8840 | (tp->bios_version_str[1] << 8); 8841 tp->bios_release = (tp->bios_version_str[4] << 8) 8842 | tp->bios_version_str[5]; 8843 8844 /* 8845 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 8846 * X32 or newer, all Z series; Some models must have an 8847 * up-to-date BIOS or they will not be detected. 8848 * 8849 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 8850 */ 8851 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 8852 if (sscanf(dev->name, 8853 "IBM ThinkPad Embedded Controller -[%17c", 8854 ec_fw_string) == 1) { 8855 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 8856 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 8857 8858 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 8859 if (!tp->ec_version_str) 8860 return -ENOMEM; 8861 8862 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 8863 tp->ec_model = ec_fw_string[0] 8864 | (ec_fw_string[1] << 8); 8865 tp->ec_release = (ec_fw_string[4] << 8) 8866 | ec_fw_string[5]; 8867 } else { 8868 pr_notice("ThinkPad firmware release %s " 8869 "doesn't match the known patterns\n", 8870 ec_fw_string); 8871 pr_notice("please report this to %s\n", 8872 TPACPI_MAIL); 8873 } 8874 break; 8875 } 8876 } 8877 8878 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 8879 if (s && !(strnicmp(s, "ThinkPad", 8) && strnicmp(s, "Lenovo", 6))) { 8880 tp->model_str = kstrdup(s, GFP_KERNEL); 8881 if (!tp->model_str) 8882 return -ENOMEM; 8883 } else { 8884 s = dmi_get_system_info(DMI_BIOS_VENDOR); 8885 if (s && !(strnicmp(s, "Lenovo", 6))) { 8886 tp->model_str = kstrdup(s, GFP_KERNEL); 8887 if (!tp->model_str) 8888 return -ENOMEM; 8889 } 8890 } 8891 8892 s = dmi_get_system_info(DMI_PRODUCT_NAME); 8893 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 8894 if (s && !tp->nummodel_str) 8895 return -ENOMEM; 8896 8897 return 0; 8898 } 8899 8900 static int __init probe_for_thinkpad(void) 8901 { 8902 int is_thinkpad; 8903 8904 if (acpi_disabled) 8905 return -ENODEV; 8906 8907 /* It would be dangerous to run the driver in this case */ 8908 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 8909 return -ENODEV; 8910 8911 /* 8912 * Non-ancient models have better DMI tagging, but very old models 8913 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 8914 */ 8915 is_thinkpad = (thinkpad_id.model_str != NULL) || 8916 (thinkpad_id.ec_model != 0) || 8917 tpacpi_is_fw_known(); 8918 8919 /* The EC handler is required */ 8920 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 8921 if (!ec_handle) { 8922 if (is_thinkpad) 8923 pr_err("Not yet supported ThinkPad detected!\n"); 8924 return -ENODEV; 8925 } 8926 8927 if (!is_thinkpad && !force_load) 8928 return -ENODEV; 8929 8930 return 0; 8931 } 8932 8933 static void __init thinkpad_acpi_init_banner(void) 8934 { 8935 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 8936 pr_info("%s\n", TPACPI_URL); 8937 8938 pr_info("ThinkPad BIOS %s, EC %s\n", 8939 (thinkpad_id.bios_version_str) ? 8940 thinkpad_id.bios_version_str : "unknown", 8941 (thinkpad_id.ec_version_str) ? 8942 thinkpad_id.ec_version_str : "unknown"); 8943 8944 BUG_ON(!thinkpad_id.vendor); 8945 8946 if (thinkpad_id.model_str) 8947 pr_info("%s %s, model %s\n", 8948 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 8949 "IBM" : ((thinkpad_id.vendor == 8950 PCI_VENDOR_ID_LENOVO) ? 8951 "Lenovo" : "Unknown vendor"), 8952 thinkpad_id.model_str, 8953 (thinkpad_id.nummodel_str) ? 8954 thinkpad_id.nummodel_str : "unknown"); 8955 } 8956 8957 /* Module init, exit, parameters */ 8958 8959 static struct ibm_init_struct ibms_init[] __initdata = { 8960 { 8961 .data = &thinkpad_acpi_driver_data, 8962 }, 8963 { 8964 .init = hotkey_init, 8965 .data = &hotkey_driver_data, 8966 }, 8967 { 8968 .init = bluetooth_init, 8969 .data = &bluetooth_driver_data, 8970 }, 8971 { 8972 .init = wan_init, 8973 .data = &wan_driver_data, 8974 }, 8975 { 8976 .init = uwb_init, 8977 .data = &uwb_driver_data, 8978 }, 8979 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 8980 { 8981 .init = video_init, 8982 .base_procfs_mode = S_IRUSR, 8983 .data = &video_driver_data, 8984 }, 8985 #endif 8986 { 8987 .init = light_init, 8988 .data = &light_driver_data, 8989 }, 8990 { 8991 .init = cmos_init, 8992 .data = &cmos_driver_data, 8993 }, 8994 { 8995 .init = led_init, 8996 .data = &led_driver_data, 8997 }, 8998 { 8999 .init = beep_init, 9000 .data = &beep_driver_data, 9001 }, 9002 { 9003 .init = thermal_init, 9004 .data = &thermal_driver_data, 9005 }, 9006 { 9007 .init = brightness_init, 9008 .data = &brightness_driver_data, 9009 }, 9010 { 9011 .init = volume_init, 9012 .data = &volume_driver_data, 9013 }, 9014 { 9015 .init = fan_init, 9016 .data = &fan_driver_data, 9017 }, 9018 { 9019 .init = mute_led_init, 9020 .data = &mute_led_driver_data, 9021 }, 9022 }; 9023 9024 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 9025 { 9026 unsigned int i; 9027 struct ibm_struct *ibm; 9028 9029 if (!kp || !kp->name || !val) 9030 return -EINVAL; 9031 9032 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9033 ibm = ibms_init[i].data; 9034 WARN_ON(ibm == NULL); 9035 9036 if (!ibm || !ibm->name) 9037 continue; 9038 9039 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 9040 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 9041 return -ENOSPC; 9042 strcpy(ibms_init[i].param, val); 9043 strcat(ibms_init[i].param, ","); 9044 return 0; 9045 } 9046 } 9047 9048 return -EINVAL; 9049 } 9050 9051 module_param(experimental, int, 0444); 9052 MODULE_PARM_DESC(experimental, 9053 "Enables experimental features when non-zero"); 9054 9055 module_param_named(debug, dbg_level, uint, 0); 9056 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 9057 9058 module_param(force_load, bool, 0444); 9059 MODULE_PARM_DESC(force_load, 9060 "Attempts to load the driver even on a " 9061 "mis-identified ThinkPad when true"); 9062 9063 module_param_named(fan_control, fan_control_allowed, bool, 0444); 9064 MODULE_PARM_DESC(fan_control, 9065 "Enables setting fan parameters features when true"); 9066 9067 module_param_named(brightness_mode, brightness_mode, uint, 0444); 9068 MODULE_PARM_DESC(brightness_mode, 9069 "Selects brightness control strategy: " 9070 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 9071 9072 module_param(brightness_enable, uint, 0444); 9073 MODULE_PARM_DESC(brightness_enable, 9074 "Enables backlight control when 1, disables when 0"); 9075 9076 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 9077 module_param_named(volume_mode, volume_mode, uint, 0444); 9078 MODULE_PARM_DESC(volume_mode, 9079 "Selects volume control strategy: " 9080 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 9081 9082 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 9083 MODULE_PARM_DESC(volume_capabilities, 9084 "Selects the mixer capabilites: " 9085 "0=auto, 1=volume and mute, 2=mute only"); 9086 9087 module_param_named(volume_control, volume_control_allowed, bool, 0444); 9088 MODULE_PARM_DESC(volume_control, 9089 "Enables software override for the console audio " 9090 "control when true"); 9091 9092 /* ALSA module API parameters */ 9093 module_param_named(index, alsa_index, int, 0444); 9094 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 9095 module_param_named(id, alsa_id, charp, 0444); 9096 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 9097 module_param_named(enable, alsa_enable, bool, 0444); 9098 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 9099 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 9100 9101 #define TPACPI_PARAM(feature) \ 9102 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 9103 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 9104 "at module load, see documentation") 9105 9106 TPACPI_PARAM(hotkey); 9107 TPACPI_PARAM(bluetooth); 9108 TPACPI_PARAM(video); 9109 TPACPI_PARAM(light); 9110 TPACPI_PARAM(cmos); 9111 TPACPI_PARAM(led); 9112 TPACPI_PARAM(beep); 9113 TPACPI_PARAM(brightness); 9114 TPACPI_PARAM(volume); 9115 TPACPI_PARAM(fan); 9116 9117 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 9118 module_param(dbg_wlswemul, uint, 0444); 9119 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 9120 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 9121 MODULE_PARM_DESC(wlsw_state, 9122 "Initial state of the emulated WLSW switch"); 9123 9124 module_param(dbg_bluetoothemul, uint, 0444); 9125 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 9126 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 9127 MODULE_PARM_DESC(bluetooth_state, 9128 "Initial state of the emulated bluetooth switch"); 9129 9130 module_param(dbg_wwanemul, uint, 0444); 9131 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 9132 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 9133 MODULE_PARM_DESC(wwan_state, 9134 "Initial state of the emulated WWAN switch"); 9135 9136 module_param(dbg_uwbemul, uint, 0444); 9137 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 9138 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 9139 MODULE_PARM_DESC(uwb_state, 9140 "Initial state of the emulated UWB switch"); 9141 #endif 9142 9143 static void thinkpad_acpi_module_exit(void) 9144 { 9145 struct ibm_struct *ibm, *itmp; 9146 9147 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 9148 9149 list_for_each_entry_safe_reverse(ibm, itmp, 9150 &tpacpi_all_drivers, 9151 all_drivers) { 9152 ibm_exit(ibm); 9153 } 9154 9155 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 9156 9157 if (tpacpi_inputdev) { 9158 if (tp_features.input_device_registered) 9159 input_unregister_device(tpacpi_inputdev); 9160 else 9161 input_free_device(tpacpi_inputdev); 9162 kfree(hotkey_keycode_map); 9163 } 9164 9165 if (tpacpi_hwmon) 9166 hwmon_device_unregister(tpacpi_hwmon); 9167 9168 if (tp_features.sensors_pdev_attrs_registered) 9169 device_remove_file(&tpacpi_sensors_pdev->dev, 9170 &dev_attr_thinkpad_acpi_pdev_name); 9171 if (tpacpi_sensors_pdev) 9172 platform_device_unregister(tpacpi_sensors_pdev); 9173 if (tpacpi_pdev) 9174 platform_device_unregister(tpacpi_pdev); 9175 9176 if (tp_features.sensors_pdrv_attrs_registered) 9177 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 9178 if (tp_features.platform_drv_attrs_registered) 9179 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 9180 9181 if (tp_features.sensors_pdrv_registered) 9182 platform_driver_unregister(&tpacpi_hwmon_pdriver); 9183 9184 if (tp_features.platform_drv_registered) 9185 platform_driver_unregister(&tpacpi_pdriver); 9186 9187 if (proc_dir) 9188 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 9189 9190 if (tpacpi_wq) 9191 destroy_workqueue(tpacpi_wq); 9192 9193 kfree(thinkpad_id.bios_version_str); 9194 kfree(thinkpad_id.ec_version_str); 9195 kfree(thinkpad_id.model_str); 9196 kfree(thinkpad_id.nummodel_str); 9197 } 9198 9199 9200 static int __init thinkpad_acpi_module_init(void) 9201 { 9202 int ret, i; 9203 9204 tpacpi_lifecycle = TPACPI_LIFE_INIT; 9205 9206 /* Driver-level probe */ 9207 9208 ret = get_thinkpad_model_data(&thinkpad_id); 9209 if (ret) { 9210 pr_err("unable to get DMI data: %d\n", ret); 9211 thinkpad_acpi_module_exit(); 9212 return ret; 9213 } 9214 ret = probe_for_thinkpad(); 9215 if (ret) { 9216 thinkpad_acpi_module_exit(); 9217 return ret; 9218 } 9219 9220 /* Driver initialization */ 9221 9222 thinkpad_acpi_init_banner(); 9223 tpacpi_check_outdated_fw(); 9224 9225 TPACPI_ACPIHANDLE_INIT(ecrd); 9226 TPACPI_ACPIHANDLE_INIT(ecwr); 9227 9228 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 9229 if (!tpacpi_wq) { 9230 thinkpad_acpi_module_exit(); 9231 return -ENOMEM; 9232 } 9233 9234 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 9235 if (!proc_dir) { 9236 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 9237 thinkpad_acpi_module_exit(); 9238 return -ENODEV; 9239 } 9240 9241 ret = platform_driver_register(&tpacpi_pdriver); 9242 if (ret) { 9243 pr_err("unable to register main platform driver\n"); 9244 thinkpad_acpi_module_exit(); 9245 return ret; 9246 } 9247 tp_features.platform_drv_registered = 1; 9248 9249 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 9250 if (ret) { 9251 pr_err("unable to register hwmon platform driver\n"); 9252 thinkpad_acpi_module_exit(); 9253 return ret; 9254 } 9255 tp_features.sensors_pdrv_registered = 1; 9256 9257 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 9258 if (!ret) { 9259 tp_features.platform_drv_attrs_registered = 1; 9260 ret = tpacpi_create_driver_attributes( 9261 &tpacpi_hwmon_pdriver.driver); 9262 } 9263 if (ret) { 9264 pr_err("unable to create sysfs driver attributes\n"); 9265 thinkpad_acpi_module_exit(); 9266 return ret; 9267 } 9268 tp_features.sensors_pdrv_attrs_registered = 1; 9269 9270 9271 /* Device initialization */ 9272 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9273 NULL, 0); 9274 if (IS_ERR(tpacpi_pdev)) { 9275 ret = PTR_ERR(tpacpi_pdev); 9276 tpacpi_pdev = NULL; 9277 pr_err("unable to register platform device\n"); 9278 thinkpad_acpi_module_exit(); 9279 return ret; 9280 } 9281 tpacpi_sensors_pdev = platform_device_register_simple( 9282 TPACPI_HWMON_DRVR_NAME, 9283 -1, NULL, 0); 9284 if (IS_ERR(tpacpi_sensors_pdev)) { 9285 ret = PTR_ERR(tpacpi_sensors_pdev); 9286 tpacpi_sensors_pdev = NULL; 9287 pr_err("unable to register hwmon platform device\n"); 9288 thinkpad_acpi_module_exit(); 9289 return ret; 9290 } 9291 ret = device_create_file(&tpacpi_sensors_pdev->dev, 9292 &dev_attr_thinkpad_acpi_pdev_name); 9293 if (ret) { 9294 pr_err("unable to create sysfs hwmon device attributes\n"); 9295 thinkpad_acpi_module_exit(); 9296 return ret; 9297 } 9298 tp_features.sensors_pdev_attrs_registered = 1; 9299 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9300 if (IS_ERR(tpacpi_hwmon)) { 9301 ret = PTR_ERR(tpacpi_hwmon); 9302 tpacpi_hwmon = NULL; 9303 pr_err("unable to register hwmon device\n"); 9304 thinkpad_acpi_module_exit(); 9305 return ret; 9306 } 9307 mutex_init(&tpacpi_inputdev_send_mutex); 9308 tpacpi_inputdev = input_allocate_device(); 9309 if (!tpacpi_inputdev) { 9310 thinkpad_acpi_module_exit(); 9311 return -ENOMEM; 9312 } else { 9313 /* Prepare input device, but don't register */ 9314 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9315 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9316 tpacpi_inputdev->id.bustype = BUS_HOST; 9317 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9318 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9319 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9320 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9321 } 9322 9323 /* Init subdriver dependencies */ 9324 tpacpi_detect_brightness_capabilities(); 9325 9326 /* Init subdrivers */ 9327 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9328 ret = ibm_init(&ibms_init[i]); 9329 if (ret >= 0 && *ibms_init[i].param) 9330 ret = ibms_init[i].data->write(ibms_init[i].param); 9331 if (ret < 0) { 9332 thinkpad_acpi_module_exit(); 9333 return ret; 9334 } 9335 } 9336 9337 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9338 9339 ret = input_register_device(tpacpi_inputdev); 9340 if (ret < 0) { 9341 pr_err("unable to register input device\n"); 9342 thinkpad_acpi_module_exit(); 9343 return ret; 9344 } else { 9345 tp_features.input_device_registered = 1; 9346 } 9347 9348 return 0; 9349 } 9350 9351 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9352 9353 /* 9354 * This will autoload the driver in almost every ThinkPad 9355 * in widespread use. 9356 * 9357 * Only _VERY_ old models, like the 240, 240x and 570 lack 9358 * the HKEY event interface. 9359 */ 9360 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9361 9362 /* 9363 * DMI matching for module autoloading 9364 * 9365 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9366 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9367 * 9368 * Only models listed in thinkwiki will be supported, so add yours 9369 * if it is not there yet. 9370 */ 9371 #define IBM_BIOS_MODULE_ALIAS(__type) \ 9372 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9373 9374 /* Ancient thinkpad BIOSes have to be identified by 9375 * BIOS type or model number, and there are far less 9376 * BIOS types than model numbers... */ 9377 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9378 9379 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9380 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9381 MODULE_DESCRIPTION(TPACPI_DESC); 9382 MODULE_VERSION(TPACPI_VERSION); 9383 MODULE_LICENSE("GPL"); 9384 9385 module_init(thinkpad_acpi_module_init); 9386 module_exit(thinkpad_acpi_module_exit); 9387