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 #include <acpi/video.h> 87 88 /* ThinkPad CMOS commands */ 89 #define TP_CMOS_VOLUME_DOWN 0 90 #define TP_CMOS_VOLUME_UP 1 91 #define TP_CMOS_VOLUME_MUTE 2 92 #define TP_CMOS_BRIGHTNESS_UP 4 93 #define TP_CMOS_BRIGHTNESS_DOWN 5 94 #define TP_CMOS_THINKLIGHT_ON 12 95 #define TP_CMOS_THINKLIGHT_OFF 13 96 97 /* NVRAM Addresses */ 98 enum tp_nvram_addr { 99 TP_NVRAM_ADDR_HK2 = 0x57, 100 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 101 TP_NVRAM_ADDR_VIDEO = 0x59, 102 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 103 TP_NVRAM_ADDR_MIXER = 0x60, 104 }; 105 106 /* NVRAM bit masks */ 107 enum { 108 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 109 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 110 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 111 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 112 TP_NVRAM_MASK_THINKLIGHT = 0x10, 113 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 114 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 115 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 116 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 117 TP_NVRAM_MASK_MUTE = 0x40, 118 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 119 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 120 TP_NVRAM_POS_LEVEL_VOLUME = 0, 121 }; 122 123 /* Misc NVRAM-related */ 124 enum { 125 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 126 }; 127 128 /* ACPI HIDs */ 129 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 130 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 131 #define TPACPI_ACPI_EC_HID "PNP0C09" 132 133 /* Input IDs */ 134 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 135 #define TPACPI_HKEY_INPUT_VERSION 0x4101 136 137 /* ACPI \WGSV commands */ 138 enum { 139 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 140 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 141 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 142 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 143 }; 144 145 /* TP_ACPI_WGSV_GET_STATE bits */ 146 enum { 147 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 148 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 149 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 150 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 151 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 152 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 153 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 154 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 155 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 156 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 157 }; 158 159 /* HKEY events */ 160 enum tpacpi_hkey_event_t { 161 /* Hotkey-related */ 162 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 163 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 164 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 165 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 166 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 167 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 168 169 /* Reasons for waking up from S3/S4 */ 170 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 171 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 172 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 173 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 174 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 175 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 176 177 /* Auto-sleep after eject request */ 178 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 179 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 180 181 /* Misc bay events */ 182 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 183 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 184 or port replicator */ 185 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 186 dock or port replicator */ 187 188 /* User-interface events */ 189 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 190 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 191 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 192 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 193 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 194 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 195 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 196 197 /* Key-related user-interface events */ 198 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 199 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 200 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */ 201 202 /* Thermal events */ 203 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 204 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 205 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 206 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 207 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 208 209 /* AC-related events */ 210 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 211 212 /* Misc */ 213 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 214 }; 215 216 /**************************************************************************** 217 * Main driver 218 */ 219 220 #define TPACPI_NAME "thinkpad" 221 #define TPACPI_DESC "ThinkPad ACPI Extras" 222 #define TPACPI_FILE TPACPI_NAME "_acpi" 223 #define TPACPI_URL "http://ibm-acpi.sf.net/" 224 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 225 226 #define TPACPI_PROC_DIR "ibm" 227 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 228 #define TPACPI_DRVR_NAME TPACPI_FILE 229 #define TPACPI_DRVR_SHORTNAME "tpacpi" 230 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 231 232 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 233 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 234 235 #define TPACPI_MAX_ACPI_ARGS 3 236 237 /* Debugging printk groups */ 238 #define TPACPI_DBG_ALL 0xffff 239 #define TPACPI_DBG_DISCLOSETASK 0x8000 240 #define TPACPI_DBG_INIT 0x0001 241 #define TPACPI_DBG_EXIT 0x0002 242 #define TPACPI_DBG_RFKILL 0x0004 243 #define TPACPI_DBG_HKEY 0x0008 244 #define TPACPI_DBG_FAN 0x0010 245 #define TPACPI_DBG_BRGHT 0x0020 246 #define TPACPI_DBG_MIXER 0x0040 247 248 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 249 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 250 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 251 252 253 /**************************************************************************** 254 * Driver-wide structs and misc. variables 255 */ 256 257 struct ibm_struct; 258 259 struct tp_acpi_drv_struct { 260 const struct acpi_device_id *hid; 261 struct acpi_driver *driver; 262 263 void (*notify) (struct ibm_struct *, u32); 264 acpi_handle *handle; 265 u32 type; 266 struct acpi_device *device; 267 }; 268 269 struct ibm_struct { 270 char *name; 271 272 int (*read) (struct seq_file *); 273 int (*write) (char *); 274 void (*exit) (void); 275 void (*resume) (void); 276 void (*suspend) (void); 277 void (*shutdown) (void); 278 279 struct list_head all_drivers; 280 281 struct tp_acpi_drv_struct *acpi; 282 283 struct { 284 u8 acpi_driver_registered:1; 285 u8 acpi_notify_installed:1; 286 u8 proc_created:1; 287 u8 init_called:1; 288 u8 experimental:1; 289 } flags; 290 }; 291 292 struct ibm_init_struct { 293 char param[32]; 294 295 int (*init) (struct ibm_init_struct *); 296 umode_t base_procfs_mode; 297 struct ibm_struct *data; 298 }; 299 300 static struct { 301 u32 bluetooth:1; 302 u32 hotkey:1; 303 u32 hotkey_mask:1; 304 u32 hotkey_wlsw:1; 305 u32 hotkey_tablet:1; 306 u32 kbdlight:1; 307 u32 light:1; 308 u32 light_status:1; 309 u32 bright_acpimode:1; 310 u32 bright_unkfw:1; 311 u32 wan:1; 312 u32 uwb:1; 313 u32 fan_ctrl_status_undef:1; 314 u32 second_fan:1; 315 u32 beep_needs_two_args:1; 316 u32 mixer_no_level_control:1; 317 u32 input_device_registered:1; 318 u32 platform_drv_registered:1; 319 u32 platform_drv_attrs_registered:1; 320 u32 sensors_pdrv_registered:1; 321 u32 sensors_pdrv_attrs_registered:1; 322 u32 sensors_pdev_attrs_registered:1; 323 u32 hotkey_poll_active:1; 324 u32 has_adaptive_kbd:1; 325 } tp_features; 326 327 static struct { 328 u16 hotkey_mask_ff:1; 329 u16 volume_ctrl_forbidden:1; 330 } tp_warned; 331 332 struct thinkpad_id_data { 333 unsigned int vendor; /* ThinkPad vendor: 334 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 335 336 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 337 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 338 339 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 340 u16 ec_model; 341 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 342 u16 ec_release; 343 344 char *model_str; /* ThinkPad T43 */ 345 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 346 }; 347 static struct thinkpad_id_data thinkpad_id; 348 349 static enum { 350 TPACPI_LIFE_INIT = 0, 351 TPACPI_LIFE_RUNNING, 352 TPACPI_LIFE_EXITING, 353 } tpacpi_lifecycle; 354 355 static int experimental; 356 static u32 dbg_level; 357 358 static struct workqueue_struct *tpacpi_wq; 359 360 enum led_status_t { 361 TPACPI_LED_OFF = 0, 362 TPACPI_LED_ON, 363 TPACPI_LED_BLINK, 364 }; 365 366 /* Special LED class that can defer work */ 367 struct tpacpi_led_classdev { 368 struct led_classdev led_classdev; 369 struct work_struct work; 370 enum led_status_t new_state; 371 int led; 372 }; 373 374 /* brightness level capabilities */ 375 static unsigned int bright_maxlvl; /* 0 = unknown */ 376 377 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 378 static int dbg_wlswemul; 379 static bool tpacpi_wlsw_emulstate; 380 static int dbg_bluetoothemul; 381 static bool tpacpi_bluetooth_emulstate; 382 static int dbg_wwanemul; 383 static bool tpacpi_wwan_emulstate; 384 static int dbg_uwbemul; 385 static bool tpacpi_uwb_emulstate; 386 #endif 387 388 389 /************************************************************************* 390 * Debugging helpers 391 */ 392 393 #define dbg_printk(a_dbg_level, format, arg...) \ 394 do { \ 395 if (dbg_level & (a_dbg_level)) \ 396 printk(KERN_DEBUG pr_fmt("%s: " format), \ 397 __func__, ##arg); \ 398 } while (0) 399 400 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 401 #define vdbg_printk dbg_printk 402 static const char *str_supported(int is_supported); 403 #else 404 static inline const char *str_supported(int is_supported) { return ""; } 405 #define vdbg_printk(a_dbg_level, format, arg...) \ 406 do { if (0) no_printk(format, ##arg); } while (0) 407 #endif 408 409 static void tpacpi_log_usertask(const char * const what) 410 { 411 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 412 what, task_tgid_vnr(current)); 413 } 414 415 #define tpacpi_disclose_usertask(what, format, arg...) \ 416 do { \ 417 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 418 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 419 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 420 what, task_tgid_vnr(current), ## arg); \ 421 } \ 422 } while (0) 423 424 /* 425 * Quirk handling helpers 426 * 427 * ThinkPad IDs and versions seen in the field so far 428 * are two-characters from the set [0-9A-Z], i.e. base 36. 429 * 430 * We use values well outside that range as specials. 431 */ 432 433 #define TPACPI_MATCH_ANY 0xffffU 434 #define TPACPI_MATCH_UNKNOWN 0U 435 436 /* TPID('1', 'Y') == 0x5931 */ 437 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 438 439 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 440 { .vendor = PCI_VENDOR_ID_IBM, \ 441 .bios = TPID(__id1, __id2), \ 442 .ec = TPACPI_MATCH_ANY, \ 443 .quirks = (__quirk) } 444 445 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 446 { .vendor = PCI_VENDOR_ID_LENOVO, \ 447 .bios = TPID(__id1, __id2), \ 448 .ec = TPACPI_MATCH_ANY, \ 449 .quirks = (__quirk) } 450 451 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 452 { .vendor = PCI_VENDOR_ID_LENOVO, \ 453 .bios = TPACPI_MATCH_ANY, \ 454 .ec = TPID(__id1, __id2), \ 455 .quirks = (__quirk) } 456 457 struct tpacpi_quirk { 458 unsigned int vendor; 459 u16 bios; 460 u16 ec; 461 unsigned long quirks; 462 }; 463 464 /** 465 * tpacpi_check_quirks() - search BIOS/EC version on a list 466 * @qlist: array of &struct tpacpi_quirk 467 * @qlist_size: number of elements in @qlist 468 * 469 * Iterates over a quirks list until one is found that matches the 470 * ThinkPad's vendor, BIOS and EC model. 471 * 472 * Returns 0 if nothing matches, otherwise returns the quirks field of 473 * the matching &struct tpacpi_quirk entry. 474 * 475 * The match criteria is: vendor, ec and bios much match. 476 */ 477 static unsigned long __init tpacpi_check_quirks( 478 const struct tpacpi_quirk *qlist, 479 unsigned int qlist_size) 480 { 481 while (qlist_size) { 482 if ((qlist->vendor == thinkpad_id.vendor || 483 qlist->vendor == TPACPI_MATCH_ANY) && 484 (qlist->bios == thinkpad_id.bios_model || 485 qlist->bios == TPACPI_MATCH_ANY) && 486 (qlist->ec == thinkpad_id.ec_model || 487 qlist->ec == TPACPI_MATCH_ANY)) 488 return qlist->quirks; 489 490 qlist_size--; 491 qlist++; 492 } 493 return 0; 494 } 495 496 static inline bool __pure __init tpacpi_is_lenovo(void) 497 { 498 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 499 } 500 501 static inline bool __pure __init tpacpi_is_ibm(void) 502 { 503 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 504 } 505 506 /**************************************************************************** 507 **************************************************************************** 508 * 509 * ACPI Helpers and device model 510 * 511 **************************************************************************** 512 ****************************************************************************/ 513 514 /************************************************************************* 515 * ACPI basic handles 516 */ 517 518 static acpi_handle root_handle; 519 static acpi_handle ec_handle; 520 521 #define TPACPI_HANDLE(object, parent, paths...) \ 522 static acpi_handle object##_handle; \ 523 static const acpi_handle * const object##_parent __initconst = \ 524 &parent##_handle; \ 525 static char *object##_paths[] __initdata = { paths } 526 527 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 528 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 529 530 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 531 /* T4x, X31, X40 */ 532 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 533 "\\CMS", /* R40, R40e */ 534 ); /* all others */ 535 536 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 537 "^HKEY", /* R30, R31 */ 538 "HKEY", /* all others */ 539 ); /* 570 */ 540 541 /************************************************************************* 542 * ACPI helpers 543 */ 544 545 static int acpi_evalf(acpi_handle handle, 546 int *res, char *method, char *fmt, ...) 547 { 548 char *fmt0 = fmt; 549 struct acpi_object_list params; 550 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 551 struct acpi_buffer result, *resultp; 552 union acpi_object out_obj; 553 acpi_status status; 554 va_list ap; 555 char res_type; 556 int success; 557 int quiet; 558 559 if (!*fmt) { 560 pr_err("acpi_evalf() called with empty format\n"); 561 return 0; 562 } 563 564 if (*fmt == 'q') { 565 quiet = 1; 566 fmt++; 567 } else 568 quiet = 0; 569 570 res_type = *(fmt++); 571 572 params.count = 0; 573 params.pointer = &in_objs[0]; 574 575 va_start(ap, fmt); 576 while (*fmt) { 577 char c = *(fmt++); 578 switch (c) { 579 case 'd': /* int */ 580 in_objs[params.count].integer.value = va_arg(ap, int); 581 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 582 break; 583 /* add more types as needed */ 584 default: 585 pr_err("acpi_evalf() called " 586 "with invalid format character '%c'\n", c); 587 va_end(ap); 588 return 0; 589 } 590 } 591 va_end(ap); 592 593 if (res_type != 'v') { 594 result.length = sizeof(out_obj); 595 result.pointer = &out_obj; 596 resultp = &result; 597 } else 598 resultp = NULL; 599 600 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 601 602 switch (res_type) { 603 case 'd': /* int */ 604 success = (status == AE_OK && 605 out_obj.type == ACPI_TYPE_INTEGER); 606 if (success && res) 607 *res = out_obj.integer.value; 608 break; 609 case 'v': /* void */ 610 success = status == AE_OK; 611 break; 612 /* add more types as needed */ 613 default: 614 pr_err("acpi_evalf() called " 615 "with invalid format character '%c'\n", res_type); 616 return 0; 617 } 618 619 if (!success && !quiet) 620 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 621 method, fmt0, acpi_format_exception(status)); 622 623 return success; 624 } 625 626 static int acpi_ec_read(int i, u8 *p) 627 { 628 int v; 629 630 if (ecrd_handle) { 631 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 632 return 0; 633 *p = v; 634 } else { 635 if (ec_read(i, p) < 0) 636 return 0; 637 } 638 639 return 1; 640 } 641 642 static int acpi_ec_write(int i, u8 v) 643 { 644 if (ecwr_handle) { 645 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 646 return 0; 647 } else { 648 if (ec_write(i, v) < 0) 649 return 0; 650 } 651 652 return 1; 653 } 654 655 static int issue_thinkpad_cmos_command(int cmos_cmd) 656 { 657 if (!cmos_handle) 658 return -ENXIO; 659 660 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 661 return -EIO; 662 663 return 0; 664 } 665 666 /************************************************************************* 667 * ACPI device model 668 */ 669 670 #define TPACPI_ACPIHANDLE_INIT(object) \ 671 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 672 object##_paths, ARRAY_SIZE(object##_paths)) 673 674 static void __init drv_acpi_handle_init(const char *name, 675 acpi_handle *handle, const acpi_handle parent, 676 char **paths, const int num_paths) 677 { 678 int i; 679 acpi_status status; 680 681 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 682 name); 683 684 for (i = 0; i < num_paths; i++) { 685 status = acpi_get_handle(parent, paths[i], handle); 686 if (ACPI_SUCCESS(status)) { 687 dbg_printk(TPACPI_DBG_INIT, 688 "Found ACPI handle %s for %s\n", 689 paths[i], name); 690 return; 691 } 692 } 693 694 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 695 name); 696 *handle = NULL; 697 } 698 699 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 700 u32 level, void *context, void **return_value) 701 { 702 struct acpi_device *dev; 703 if (!strcmp(context, "video")) { 704 if (acpi_bus_get_device(handle, &dev)) 705 return AE_OK; 706 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 707 return AE_OK; 708 } 709 710 *(acpi_handle *)return_value = handle; 711 712 return AE_CTRL_TERMINATE; 713 } 714 715 static void __init tpacpi_acpi_handle_locate(const char *name, 716 const char *hid, 717 acpi_handle *handle) 718 { 719 acpi_status status; 720 acpi_handle device_found; 721 722 BUG_ON(!name || !handle); 723 vdbg_printk(TPACPI_DBG_INIT, 724 "trying to locate ACPI handle for %s, using HID %s\n", 725 name, hid ? hid : "NULL"); 726 727 memset(&device_found, 0, sizeof(device_found)); 728 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 729 (void *)name, &device_found); 730 731 *handle = NULL; 732 733 if (ACPI_SUCCESS(status)) { 734 *handle = device_found; 735 dbg_printk(TPACPI_DBG_INIT, 736 "Found ACPI handle for %s\n", name); 737 } else { 738 vdbg_printk(TPACPI_DBG_INIT, 739 "Could not locate an ACPI handle for %s: %s\n", 740 name, acpi_format_exception(status)); 741 } 742 } 743 744 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 745 { 746 struct ibm_struct *ibm = data; 747 748 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 749 return; 750 751 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 752 return; 753 754 ibm->acpi->notify(ibm, event); 755 } 756 757 static int __init setup_acpi_notify(struct ibm_struct *ibm) 758 { 759 acpi_status status; 760 int rc; 761 762 BUG_ON(!ibm->acpi); 763 764 if (!*ibm->acpi->handle) 765 return 0; 766 767 vdbg_printk(TPACPI_DBG_INIT, 768 "setting up ACPI notify for %s\n", ibm->name); 769 770 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 771 if (rc < 0) { 772 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 773 return -ENODEV; 774 } 775 776 ibm->acpi->device->driver_data = ibm; 777 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 778 TPACPI_ACPI_EVENT_PREFIX, 779 ibm->name); 780 781 status = acpi_install_notify_handler(*ibm->acpi->handle, 782 ibm->acpi->type, dispatch_acpi_notify, ibm); 783 if (ACPI_FAILURE(status)) { 784 if (status == AE_ALREADY_EXISTS) { 785 pr_notice("another device driver is already " 786 "handling %s events\n", ibm->name); 787 } else { 788 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 789 ibm->name, acpi_format_exception(status)); 790 } 791 return -ENODEV; 792 } 793 ibm->flags.acpi_notify_installed = 1; 794 return 0; 795 } 796 797 static int __init tpacpi_device_add(struct acpi_device *device) 798 { 799 return 0; 800 } 801 802 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 803 { 804 int rc; 805 806 dbg_printk(TPACPI_DBG_INIT, 807 "registering %s as an ACPI driver\n", ibm->name); 808 809 BUG_ON(!ibm->acpi); 810 811 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 812 if (!ibm->acpi->driver) { 813 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 814 return -ENOMEM; 815 } 816 817 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 818 ibm->acpi->driver->ids = ibm->acpi->hid; 819 820 ibm->acpi->driver->ops.add = &tpacpi_device_add; 821 822 rc = acpi_bus_register_driver(ibm->acpi->driver); 823 if (rc < 0) { 824 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 825 ibm->name, rc); 826 kfree(ibm->acpi->driver); 827 ibm->acpi->driver = NULL; 828 } else if (!rc) 829 ibm->flags.acpi_driver_registered = 1; 830 831 return rc; 832 } 833 834 835 /**************************************************************************** 836 **************************************************************************** 837 * 838 * Procfs Helpers 839 * 840 **************************************************************************** 841 ****************************************************************************/ 842 843 static int dispatch_proc_show(struct seq_file *m, void *v) 844 { 845 struct ibm_struct *ibm = m->private; 846 847 if (!ibm || !ibm->read) 848 return -EINVAL; 849 return ibm->read(m); 850 } 851 852 static int dispatch_proc_open(struct inode *inode, struct file *file) 853 { 854 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 855 } 856 857 static ssize_t dispatch_proc_write(struct file *file, 858 const char __user *userbuf, 859 size_t count, loff_t *pos) 860 { 861 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 862 char *kernbuf; 863 int ret; 864 865 if (!ibm || !ibm->write) 866 return -EINVAL; 867 if (count > PAGE_SIZE - 2) 868 return -EINVAL; 869 870 kernbuf = kmalloc(count + 2, GFP_KERNEL); 871 if (!kernbuf) 872 return -ENOMEM; 873 874 if (copy_from_user(kernbuf, userbuf, count)) { 875 kfree(kernbuf); 876 return -EFAULT; 877 } 878 879 kernbuf[count] = 0; 880 strcat(kernbuf, ","); 881 ret = ibm->write(kernbuf); 882 if (ret == 0) 883 ret = count; 884 885 kfree(kernbuf); 886 887 return ret; 888 } 889 890 static const struct file_operations dispatch_proc_fops = { 891 .owner = THIS_MODULE, 892 .open = dispatch_proc_open, 893 .read = seq_read, 894 .llseek = seq_lseek, 895 .release = single_release, 896 .write = dispatch_proc_write, 897 }; 898 899 static char *next_cmd(char **cmds) 900 { 901 char *start = *cmds; 902 char *end; 903 904 while ((end = strchr(start, ',')) && end == start) 905 start = end + 1; 906 907 if (!end) 908 return NULL; 909 910 *end = 0; 911 *cmds = end + 1; 912 return start; 913 } 914 915 916 /**************************************************************************** 917 **************************************************************************** 918 * 919 * Device model: input, hwmon and platform 920 * 921 **************************************************************************** 922 ****************************************************************************/ 923 924 static struct platform_device *tpacpi_pdev; 925 static struct platform_device *tpacpi_sensors_pdev; 926 static struct device *tpacpi_hwmon; 927 static struct input_dev *tpacpi_inputdev; 928 static struct mutex tpacpi_inputdev_send_mutex; 929 static LIST_HEAD(tpacpi_all_drivers); 930 931 #ifdef CONFIG_PM_SLEEP 932 static int tpacpi_suspend_handler(struct device *dev) 933 { 934 struct ibm_struct *ibm, *itmp; 935 936 list_for_each_entry_safe(ibm, itmp, 937 &tpacpi_all_drivers, 938 all_drivers) { 939 if (ibm->suspend) 940 (ibm->suspend)(); 941 } 942 943 return 0; 944 } 945 946 static int tpacpi_resume_handler(struct device *dev) 947 { 948 struct ibm_struct *ibm, *itmp; 949 950 list_for_each_entry_safe(ibm, itmp, 951 &tpacpi_all_drivers, 952 all_drivers) { 953 if (ibm->resume) 954 (ibm->resume)(); 955 } 956 957 return 0; 958 } 959 #endif 960 961 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 962 tpacpi_suspend_handler, tpacpi_resume_handler); 963 964 static void tpacpi_shutdown_handler(struct platform_device *pdev) 965 { 966 struct ibm_struct *ibm, *itmp; 967 968 list_for_each_entry_safe(ibm, itmp, 969 &tpacpi_all_drivers, 970 all_drivers) { 971 if (ibm->shutdown) 972 (ibm->shutdown)(); 973 } 974 } 975 976 static struct platform_driver tpacpi_pdriver = { 977 .driver = { 978 .name = TPACPI_DRVR_NAME, 979 .pm = &tpacpi_pm, 980 }, 981 .shutdown = tpacpi_shutdown_handler, 982 }; 983 984 static struct platform_driver tpacpi_hwmon_pdriver = { 985 .driver = { 986 .name = TPACPI_HWMON_DRVR_NAME, 987 }, 988 }; 989 990 /************************************************************************* 991 * sysfs support helpers 992 */ 993 994 struct attribute_set { 995 unsigned int members, max_members; 996 struct attribute_group group; 997 }; 998 999 struct attribute_set_obj { 1000 struct attribute_set s; 1001 struct attribute *a; 1002 } __attribute__((packed)); 1003 1004 static struct attribute_set *create_attr_set(unsigned int max_members, 1005 const char *name) 1006 { 1007 struct attribute_set_obj *sobj; 1008 1009 if (max_members == 0) 1010 return NULL; 1011 1012 /* Allocates space for implicit NULL at the end too */ 1013 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1014 max_members * sizeof(struct attribute *), 1015 GFP_KERNEL); 1016 if (!sobj) 1017 return NULL; 1018 sobj->s.max_members = max_members; 1019 sobj->s.group.attrs = &sobj->a; 1020 sobj->s.group.name = name; 1021 1022 return &sobj->s; 1023 } 1024 1025 #define destroy_attr_set(_set) \ 1026 kfree(_set); 1027 1028 /* not multi-threaded safe, use it in a single thread per set */ 1029 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1030 { 1031 if (!s || !attr) 1032 return -EINVAL; 1033 1034 if (s->members >= s->max_members) 1035 return -ENOMEM; 1036 1037 s->group.attrs[s->members] = attr; 1038 s->members++; 1039 1040 return 0; 1041 } 1042 1043 static int add_many_to_attr_set(struct attribute_set *s, 1044 struct attribute **attr, 1045 unsigned int count) 1046 { 1047 int i, res; 1048 1049 for (i = 0; i < count; i++) { 1050 res = add_to_attr_set(s, attr[i]); 1051 if (res) 1052 return res; 1053 } 1054 1055 return 0; 1056 } 1057 1058 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1059 { 1060 sysfs_remove_group(kobj, &s->group); 1061 destroy_attr_set(s); 1062 } 1063 1064 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1065 sysfs_create_group(_kobj, &_attr_set->group) 1066 1067 static int parse_strtoul(const char *buf, 1068 unsigned long max, unsigned long *value) 1069 { 1070 char *endp; 1071 1072 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1073 endp = skip_spaces(endp); 1074 if (*endp || *value > max) 1075 return -EINVAL; 1076 1077 return 0; 1078 } 1079 1080 static void tpacpi_disable_brightness_delay(void) 1081 { 1082 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1083 pr_notice("ACPI backlight control delay disabled\n"); 1084 } 1085 1086 static void printk_deprecated_attribute(const char * const what, 1087 const char * const details) 1088 { 1089 tpacpi_log_usertask("deprecated sysfs attribute"); 1090 pr_warn("WARNING: sysfs attribute %s is deprecated and " 1091 "will be removed. %s\n", 1092 what, details); 1093 } 1094 1095 /************************************************************************* 1096 * rfkill and radio control support helpers 1097 */ 1098 1099 /* 1100 * ThinkPad-ACPI firmware handling model: 1101 * 1102 * WLSW (master wireless switch) is event-driven, and is common to all 1103 * firmware-controlled radios. It cannot be controlled, just monitored, 1104 * as expected. It overrides all radio state in firmware 1105 * 1106 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1107 * (TODO: verify how WLSW interacts with the returned radio state). 1108 * 1109 * The only time there are shadow radio state changes, is when 1110 * masked-off hotkeys are used. 1111 */ 1112 1113 /* 1114 * Internal driver API for radio state: 1115 * 1116 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1117 * bool: true means radio blocked (off) 1118 */ 1119 enum tpacpi_rfkill_state { 1120 TPACPI_RFK_RADIO_OFF = 0, 1121 TPACPI_RFK_RADIO_ON 1122 }; 1123 1124 /* rfkill switches */ 1125 enum tpacpi_rfk_id { 1126 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1127 TPACPI_RFK_WWAN_SW_ID, 1128 TPACPI_RFK_UWB_SW_ID, 1129 TPACPI_RFK_SW_MAX 1130 }; 1131 1132 static const char *tpacpi_rfkill_names[] = { 1133 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1134 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1135 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1136 [TPACPI_RFK_SW_MAX] = NULL 1137 }; 1138 1139 /* ThinkPad-ACPI rfkill subdriver */ 1140 struct tpacpi_rfk { 1141 struct rfkill *rfkill; 1142 enum tpacpi_rfk_id id; 1143 const struct tpacpi_rfk_ops *ops; 1144 }; 1145 1146 struct tpacpi_rfk_ops { 1147 /* firmware interface */ 1148 int (*get_status)(void); 1149 int (*set_status)(const enum tpacpi_rfkill_state); 1150 }; 1151 1152 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1153 1154 /* Query FW and update rfkill sw state for a given rfkill switch */ 1155 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1156 { 1157 int status; 1158 1159 if (!tp_rfk) 1160 return -ENODEV; 1161 1162 status = (tp_rfk->ops->get_status)(); 1163 if (status < 0) 1164 return status; 1165 1166 rfkill_set_sw_state(tp_rfk->rfkill, 1167 (status == TPACPI_RFK_RADIO_OFF)); 1168 1169 return status; 1170 } 1171 1172 /* Query FW and update rfkill sw state for all rfkill switches */ 1173 static void tpacpi_rfk_update_swstate_all(void) 1174 { 1175 unsigned int i; 1176 1177 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1178 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1179 } 1180 1181 /* 1182 * Sync the HW-blocking state of all rfkill switches, 1183 * do notice it causes the rfkill core to schedule uevents 1184 */ 1185 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1186 { 1187 unsigned int i; 1188 struct tpacpi_rfk *tp_rfk; 1189 1190 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1191 tp_rfk = tpacpi_rfkill_switches[i]; 1192 if (tp_rfk) { 1193 if (rfkill_set_hw_state(tp_rfk->rfkill, 1194 blocked)) { 1195 /* ignore -- we track sw block */ 1196 } 1197 } 1198 } 1199 } 1200 1201 /* Call to get the WLSW state from the firmware */ 1202 static int hotkey_get_wlsw(void); 1203 1204 /* Call to query WLSW state and update all rfkill switches */ 1205 static bool tpacpi_rfk_check_hwblock_state(void) 1206 { 1207 int res = hotkey_get_wlsw(); 1208 int hw_blocked; 1209 1210 /* When unknown or unsupported, we have to assume it is unblocked */ 1211 if (res < 0) 1212 return false; 1213 1214 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1215 tpacpi_rfk_update_hwblock_state(hw_blocked); 1216 1217 return hw_blocked; 1218 } 1219 1220 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1221 { 1222 struct tpacpi_rfk *tp_rfk = data; 1223 int res; 1224 1225 dbg_printk(TPACPI_DBG_RFKILL, 1226 "request to change radio state to %s\n", 1227 blocked ? "blocked" : "unblocked"); 1228 1229 /* try to set radio state */ 1230 res = (tp_rfk->ops->set_status)(blocked ? 1231 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1232 1233 /* and update the rfkill core with whatever the FW really did */ 1234 tpacpi_rfk_update_swstate(tp_rfk); 1235 1236 return (res < 0) ? res : 0; 1237 } 1238 1239 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1240 .set_block = tpacpi_rfk_hook_set_block, 1241 }; 1242 1243 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1244 const struct tpacpi_rfk_ops *tp_rfkops, 1245 const enum rfkill_type rfktype, 1246 const char *name, 1247 const bool set_default) 1248 { 1249 struct tpacpi_rfk *atp_rfk; 1250 int res; 1251 bool sw_state = false; 1252 bool hw_state; 1253 int sw_status; 1254 1255 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1256 1257 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1258 if (atp_rfk) 1259 atp_rfk->rfkill = rfkill_alloc(name, 1260 &tpacpi_pdev->dev, 1261 rfktype, 1262 &tpacpi_rfk_rfkill_ops, 1263 atp_rfk); 1264 if (!atp_rfk || !atp_rfk->rfkill) { 1265 pr_err("failed to allocate memory for rfkill class\n"); 1266 kfree(atp_rfk); 1267 return -ENOMEM; 1268 } 1269 1270 atp_rfk->id = id; 1271 atp_rfk->ops = tp_rfkops; 1272 1273 sw_status = (tp_rfkops->get_status)(); 1274 if (sw_status < 0) { 1275 pr_err("failed to read initial state for %s, error %d\n", 1276 name, sw_status); 1277 } else { 1278 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1279 if (set_default) { 1280 /* try to keep the initial state, since we ask the 1281 * firmware to preserve it across S5 in NVRAM */ 1282 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1283 } 1284 } 1285 hw_state = tpacpi_rfk_check_hwblock_state(); 1286 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1287 1288 res = rfkill_register(atp_rfk->rfkill); 1289 if (res < 0) { 1290 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1291 rfkill_destroy(atp_rfk->rfkill); 1292 kfree(atp_rfk); 1293 return res; 1294 } 1295 1296 tpacpi_rfkill_switches[id] = atp_rfk; 1297 1298 pr_info("rfkill switch %s: radio is %sblocked\n", 1299 name, (sw_state || hw_state) ? "" : "un"); 1300 return 0; 1301 } 1302 1303 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1304 { 1305 struct tpacpi_rfk *tp_rfk; 1306 1307 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1308 1309 tp_rfk = tpacpi_rfkill_switches[id]; 1310 if (tp_rfk) { 1311 rfkill_unregister(tp_rfk->rfkill); 1312 rfkill_destroy(tp_rfk->rfkill); 1313 tpacpi_rfkill_switches[id] = NULL; 1314 kfree(tp_rfk); 1315 } 1316 } 1317 1318 static void printk_deprecated_rfkill_attribute(const char * const what) 1319 { 1320 printk_deprecated_attribute(what, 1321 "Please switch to generic rfkill before year 2010"); 1322 } 1323 1324 /* sysfs <radio> enable ------------------------------------------------ */ 1325 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1326 struct device_attribute *attr, 1327 char *buf) 1328 { 1329 int status; 1330 1331 printk_deprecated_rfkill_attribute(attr->attr.name); 1332 1333 /* This is in the ABI... */ 1334 if (tpacpi_rfk_check_hwblock_state()) { 1335 status = TPACPI_RFK_RADIO_OFF; 1336 } else { 1337 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1338 if (status < 0) 1339 return status; 1340 } 1341 1342 return snprintf(buf, PAGE_SIZE, "%d\n", 1343 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1344 } 1345 1346 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1347 struct device_attribute *attr, 1348 const char *buf, size_t count) 1349 { 1350 unsigned long t; 1351 int res; 1352 1353 printk_deprecated_rfkill_attribute(attr->attr.name); 1354 1355 if (parse_strtoul(buf, 1, &t)) 1356 return -EINVAL; 1357 1358 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1359 1360 /* This is in the ABI... */ 1361 if (tpacpi_rfk_check_hwblock_state() && !!t) 1362 return -EPERM; 1363 1364 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1365 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1366 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1367 1368 return (res < 0) ? res : count; 1369 } 1370 1371 /* procfs -------------------------------------------------------------- */ 1372 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1373 { 1374 if (id >= TPACPI_RFK_SW_MAX) 1375 seq_printf(m, "status:\t\tnot supported\n"); 1376 else { 1377 int status; 1378 1379 /* This is in the ABI... */ 1380 if (tpacpi_rfk_check_hwblock_state()) { 1381 status = TPACPI_RFK_RADIO_OFF; 1382 } else { 1383 status = tpacpi_rfk_update_swstate( 1384 tpacpi_rfkill_switches[id]); 1385 if (status < 0) 1386 return status; 1387 } 1388 1389 seq_printf(m, "status:\t\t%s\n", 1390 (status == TPACPI_RFK_RADIO_ON) ? 1391 "enabled" : "disabled"); 1392 seq_printf(m, "commands:\tenable, disable\n"); 1393 } 1394 1395 return 0; 1396 } 1397 1398 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1399 { 1400 char *cmd; 1401 int status = -1; 1402 int res = 0; 1403 1404 if (id >= TPACPI_RFK_SW_MAX) 1405 return -ENODEV; 1406 1407 while ((cmd = next_cmd(&buf))) { 1408 if (strlencmp(cmd, "enable") == 0) 1409 status = TPACPI_RFK_RADIO_ON; 1410 else if (strlencmp(cmd, "disable") == 0) 1411 status = TPACPI_RFK_RADIO_OFF; 1412 else 1413 return -EINVAL; 1414 } 1415 1416 if (status != -1) { 1417 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1418 (status == TPACPI_RFK_RADIO_ON) ? 1419 "enable" : "disable", 1420 tpacpi_rfkill_names[id]); 1421 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1422 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1423 } 1424 1425 return res; 1426 } 1427 1428 /************************************************************************* 1429 * thinkpad-acpi driver attributes 1430 */ 1431 1432 /* interface_version --------------------------------------------------- */ 1433 static ssize_t tpacpi_driver_interface_version_show( 1434 struct device_driver *drv, 1435 char *buf) 1436 { 1437 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1438 } 1439 1440 static DRIVER_ATTR(interface_version, S_IRUGO, 1441 tpacpi_driver_interface_version_show, NULL); 1442 1443 /* debug_level --------------------------------------------------------- */ 1444 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1445 char *buf) 1446 { 1447 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1448 } 1449 1450 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1451 const char *buf, size_t count) 1452 { 1453 unsigned long t; 1454 1455 if (parse_strtoul(buf, 0xffff, &t)) 1456 return -EINVAL; 1457 1458 dbg_level = t; 1459 1460 return count; 1461 } 1462 1463 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1464 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1465 1466 /* version ------------------------------------------------------------- */ 1467 static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1468 char *buf) 1469 { 1470 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1471 TPACPI_DESC, TPACPI_VERSION); 1472 } 1473 1474 static DRIVER_ATTR(version, S_IRUGO, 1475 tpacpi_driver_version_show, NULL); 1476 1477 /* --------------------------------------------------------------------- */ 1478 1479 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1480 1481 /* wlsw_emulstate ------------------------------------------------------ */ 1482 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1483 char *buf) 1484 { 1485 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1486 } 1487 1488 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1489 const char *buf, size_t count) 1490 { 1491 unsigned long t; 1492 1493 if (parse_strtoul(buf, 1, &t)) 1494 return -EINVAL; 1495 1496 if (tpacpi_wlsw_emulstate != !!t) { 1497 tpacpi_wlsw_emulstate = !!t; 1498 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1499 } 1500 1501 return count; 1502 } 1503 1504 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1505 tpacpi_driver_wlsw_emulstate_show, 1506 tpacpi_driver_wlsw_emulstate_store); 1507 1508 /* bluetooth_emulstate ------------------------------------------------- */ 1509 static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1510 struct device_driver *drv, 1511 char *buf) 1512 { 1513 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1514 } 1515 1516 static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1517 struct device_driver *drv, 1518 const char *buf, size_t count) 1519 { 1520 unsigned long t; 1521 1522 if (parse_strtoul(buf, 1, &t)) 1523 return -EINVAL; 1524 1525 tpacpi_bluetooth_emulstate = !!t; 1526 1527 return count; 1528 } 1529 1530 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1531 tpacpi_driver_bluetooth_emulstate_show, 1532 tpacpi_driver_bluetooth_emulstate_store); 1533 1534 /* wwan_emulstate ------------------------------------------------- */ 1535 static ssize_t tpacpi_driver_wwan_emulstate_show( 1536 struct device_driver *drv, 1537 char *buf) 1538 { 1539 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1540 } 1541 1542 static ssize_t tpacpi_driver_wwan_emulstate_store( 1543 struct device_driver *drv, 1544 const char *buf, size_t count) 1545 { 1546 unsigned long t; 1547 1548 if (parse_strtoul(buf, 1, &t)) 1549 return -EINVAL; 1550 1551 tpacpi_wwan_emulstate = !!t; 1552 1553 return count; 1554 } 1555 1556 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1557 tpacpi_driver_wwan_emulstate_show, 1558 tpacpi_driver_wwan_emulstate_store); 1559 1560 /* uwb_emulstate ------------------------------------------------- */ 1561 static ssize_t tpacpi_driver_uwb_emulstate_show( 1562 struct device_driver *drv, 1563 char *buf) 1564 { 1565 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1566 } 1567 1568 static ssize_t tpacpi_driver_uwb_emulstate_store( 1569 struct device_driver *drv, 1570 const char *buf, size_t count) 1571 { 1572 unsigned long t; 1573 1574 if (parse_strtoul(buf, 1, &t)) 1575 return -EINVAL; 1576 1577 tpacpi_uwb_emulstate = !!t; 1578 1579 return count; 1580 } 1581 1582 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1583 tpacpi_driver_uwb_emulstate_show, 1584 tpacpi_driver_uwb_emulstate_store); 1585 #endif 1586 1587 /* --------------------------------------------------------------------- */ 1588 1589 static struct driver_attribute *tpacpi_driver_attributes[] = { 1590 &driver_attr_debug_level, &driver_attr_version, 1591 &driver_attr_interface_version, 1592 }; 1593 1594 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1595 { 1596 int i, res; 1597 1598 i = 0; 1599 res = 0; 1600 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1601 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1602 i++; 1603 } 1604 1605 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1606 if (!res && dbg_wlswemul) 1607 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1608 if (!res && dbg_bluetoothemul) 1609 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1610 if (!res && dbg_wwanemul) 1611 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1612 if (!res && dbg_uwbemul) 1613 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1614 #endif 1615 1616 return res; 1617 } 1618 1619 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1620 { 1621 int i; 1622 1623 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1624 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1625 1626 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1627 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1628 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1629 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1630 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1631 #endif 1632 } 1633 1634 /************************************************************************* 1635 * Firmware Data 1636 */ 1637 1638 /* 1639 * Table of recommended minimum BIOS versions 1640 * 1641 * Reasons for listing: 1642 * 1. Stable BIOS, listed because the unknown amount of 1643 * bugs and bad ACPI behaviour on older versions 1644 * 1645 * 2. BIOS or EC fw with known bugs that trigger on Linux 1646 * 1647 * 3. BIOS with known reduced functionality in older versions 1648 * 1649 * We recommend the latest BIOS and EC version. 1650 * We only support the latest BIOS and EC fw version as a rule. 1651 * 1652 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1653 * Information from users in ThinkWiki 1654 * 1655 * WARNING: we use this table also to detect that the machine is 1656 * a ThinkPad in some cases, so don't remove entries lightly. 1657 */ 1658 1659 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1660 { .vendor = (__v), \ 1661 .bios = TPID(__id1, __id2), \ 1662 .ec = TPACPI_MATCH_ANY, \ 1663 .quirks = TPACPI_MATCH_ANY << 16 \ 1664 | (__bv1) << 8 | (__bv2) } 1665 1666 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1667 __eid, __ev1, __ev2) \ 1668 { .vendor = (__v), \ 1669 .bios = TPID(__bid1, __bid2), \ 1670 .ec = __eid, \ 1671 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1672 | (__bv1) << 8 | (__bv2) } 1673 1674 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1675 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1676 1677 /* Outdated IBM BIOSes often lack the EC id string */ 1678 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1679 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1680 __bv1, __bv2, TPID(__id1, __id2), \ 1681 __ev1, __ev2), \ 1682 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1683 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1684 __ev1, __ev2) 1685 1686 /* Outdated IBM BIOSes often lack the EC id string */ 1687 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1688 __eid1, __eid2, __ev1, __ev2) \ 1689 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1690 __bv1, __bv2, TPID(__eid1, __eid2), \ 1691 __ev1, __ev2), \ 1692 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1693 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1694 __ev1, __ev2) 1695 1696 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1697 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1698 1699 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1700 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1701 __bv1, __bv2, TPID(__id1, __id2), \ 1702 __ev1, __ev2) 1703 1704 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1705 __eid1, __eid2, __ev1, __ev2) \ 1706 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1707 __bv1, __bv2, TPID(__eid1, __eid2), \ 1708 __ev1, __ev2) 1709 1710 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1711 /* Numeric models ------------------ */ 1712 /* FW MODEL BIOS VERS */ 1713 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1714 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1715 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1716 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1717 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1718 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1719 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1720 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1721 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1722 1723 /* A-series ------------------------- */ 1724 /* FW MODEL BIOS VERS EC VERS */ 1725 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1726 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1727 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1728 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1729 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1730 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1731 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1732 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1733 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1734 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1735 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1736 1737 /* G-series ------------------------- */ 1738 /* FW MODEL BIOS VERS */ 1739 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1740 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1741 1742 /* R-series, T-series --------------- */ 1743 /* FW MODEL BIOS VERS EC VERS */ 1744 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1745 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1746 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1747 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1748 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1749 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1750 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1751 T40/p, T41/p, T42/p (1) */ 1752 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1753 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1754 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1755 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1756 1757 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1758 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1759 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1760 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1761 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1762 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1763 1764 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1765 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1766 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1767 1768 /* BIOS FW BIOS VERS EC FW EC VERS */ 1769 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1770 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1771 1772 /* X-series ------------------------- */ 1773 /* FW MODEL BIOS VERS EC VERS */ 1774 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1775 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1776 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1777 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1778 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1779 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1780 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1781 1782 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1783 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1784 1785 /* (0) - older versions lack DMI EC fw string and functionality */ 1786 /* (1) - older versions known to lack functionality */ 1787 }; 1788 1789 #undef TPV_QL1 1790 #undef TPV_QL0 1791 #undef TPV_QI2 1792 #undef TPV_QI1 1793 #undef TPV_QI0 1794 #undef TPV_Q_X 1795 #undef TPV_Q 1796 1797 static void __init tpacpi_check_outdated_fw(void) 1798 { 1799 unsigned long fwvers; 1800 u16 ec_version, bios_version; 1801 1802 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1803 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1804 1805 if (!fwvers) 1806 return; 1807 1808 bios_version = fwvers & 0xffffU; 1809 ec_version = (fwvers >> 16) & 0xffffU; 1810 1811 /* note that unknown versions are set to 0x0000 and we use that */ 1812 if ((bios_version > thinkpad_id.bios_release) || 1813 (ec_version > thinkpad_id.ec_release && 1814 ec_version != TPACPI_MATCH_ANY)) { 1815 /* 1816 * The changelogs would let us track down the exact 1817 * reason, but it is just too much of a pain to track 1818 * it. We only list BIOSes that are either really 1819 * broken, or really stable to begin with, so it is 1820 * best if the user upgrades the firmware anyway. 1821 */ 1822 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1823 pr_warn("WARNING: This firmware may be missing critical bug " 1824 "fixes and/or important features\n"); 1825 } 1826 } 1827 1828 static bool __init tpacpi_is_fw_known(void) 1829 { 1830 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1831 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1832 } 1833 1834 /**************************************************************************** 1835 **************************************************************************** 1836 * 1837 * Subdrivers 1838 * 1839 **************************************************************************** 1840 ****************************************************************************/ 1841 1842 /************************************************************************* 1843 * thinkpad-acpi metadata subdriver 1844 */ 1845 1846 static int thinkpad_acpi_driver_read(struct seq_file *m) 1847 { 1848 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1849 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1850 return 0; 1851 } 1852 1853 static struct ibm_struct thinkpad_acpi_driver_data = { 1854 .name = "driver", 1855 .read = thinkpad_acpi_driver_read, 1856 }; 1857 1858 /************************************************************************* 1859 * Hotkey subdriver 1860 */ 1861 1862 /* 1863 * ThinkPad firmware event model 1864 * 1865 * The ThinkPad firmware has two main event interfaces: normal ACPI 1866 * notifications (which follow the ACPI standard), and a private event 1867 * interface. 1868 * 1869 * The private event interface also issues events for the hotkeys. As 1870 * the driver gained features, the event handling code ended up being 1871 * built around the hotkey subdriver. This will need to be refactored 1872 * to a more formal event API eventually. 1873 * 1874 * Some "hotkeys" are actually supposed to be used as event reports, 1875 * such as "brightness has changed", "volume has changed", depending on 1876 * the ThinkPad model and how the firmware is operating. 1877 * 1878 * Unlike other classes, hotkey-class events have mask/unmask control on 1879 * non-ancient firmware. However, how it behaves changes a lot with the 1880 * firmware model and version. 1881 */ 1882 1883 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1884 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1885 TP_ACPI_HOTKEYSCAN_FNF2, 1886 TP_ACPI_HOTKEYSCAN_FNF3, 1887 TP_ACPI_HOTKEYSCAN_FNF4, 1888 TP_ACPI_HOTKEYSCAN_FNF5, 1889 TP_ACPI_HOTKEYSCAN_FNF6, 1890 TP_ACPI_HOTKEYSCAN_FNF7, 1891 TP_ACPI_HOTKEYSCAN_FNF8, 1892 TP_ACPI_HOTKEYSCAN_FNF9, 1893 TP_ACPI_HOTKEYSCAN_FNF10, 1894 TP_ACPI_HOTKEYSCAN_FNF11, 1895 TP_ACPI_HOTKEYSCAN_FNF12, 1896 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1897 TP_ACPI_HOTKEYSCAN_FNINSERT, 1898 TP_ACPI_HOTKEYSCAN_FNDELETE, 1899 TP_ACPI_HOTKEYSCAN_FNHOME, 1900 TP_ACPI_HOTKEYSCAN_FNEND, 1901 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1902 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1903 TP_ACPI_HOTKEYSCAN_FNSPACE, 1904 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1905 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1906 TP_ACPI_HOTKEYSCAN_MUTE, 1907 TP_ACPI_HOTKEYSCAN_THINKPAD, 1908 TP_ACPI_HOTKEYSCAN_UNK1, 1909 TP_ACPI_HOTKEYSCAN_UNK2, 1910 TP_ACPI_HOTKEYSCAN_UNK3, 1911 TP_ACPI_HOTKEYSCAN_UNK4, 1912 TP_ACPI_HOTKEYSCAN_UNK5, 1913 TP_ACPI_HOTKEYSCAN_UNK6, 1914 TP_ACPI_HOTKEYSCAN_UNK7, 1915 TP_ACPI_HOTKEYSCAN_UNK8, 1916 1917 TP_ACPI_HOTKEYSCAN_MUTE2, 1918 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1919 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1920 TP_ACPI_HOTKEYSCAN_CLOUD, 1921 TP_ACPI_HOTKEYSCAN_UNK9, 1922 TP_ACPI_HOTKEYSCAN_VOICE, 1923 TP_ACPI_HOTKEYSCAN_UNK10, 1924 TP_ACPI_HOTKEYSCAN_GESTURES, 1925 TP_ACPI_HOTKEYSCAN_UNK11, 1926 TP_ACPI_HOTKEYSCAN_UNK12, 1927 TP_ACPI_HOTKEYSCAN_UNK13, 1928 TP_ACPI_HOTKEYSCAN_CONFIG, 1929 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1930 TP_ACPI_HOTKEYSCAN_RELOAD, 1931 TP_ACPI_HOTKEYSCAN_BACK, 1932 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1933 TP_ACPI_HOTKEYSCAN_MIC_UP, 1934 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1935 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1936 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1937 1938 /* Hotkey keymap size */ 1939 TPACPI_HOTKEY_MAP_LEN 1940 }; 1941 1942 enum { /* Keys/events available through NVRAM polling */ 1943 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1944 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1945 }; 1946 1947 enum { /* Positions of some of the keys in hotkey masks */ 1948 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1949 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1950 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1951 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1952 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1953 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1954 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1955 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1956 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1957 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1958 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1959 }; 1960 1961 enum { /* NVRAM to ACPI HKEY group map */ 1962 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1963 TP_ACPI_HKEY_ZOOM_MASK | 1964 TP_ACPI_HKEY_DISPSWTCH_MASK | 1965 TP_ACPI_HKEY_HIBERNATE_MASK, 1966 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1967 TP_ACPI_HKEY_BRGHTDWN_MASK, 1968 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1969 TP_ACPI_HKEY_VOLDWN_MASK | 1970 TP_ACPI_HKEY_MUTE_MASK, 1971 }; 1972 1973 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1974 struct tp_nvram_state { 1975 u16 thinkpad_toggle:1; 1976 u16 zoom_toggle:1; 1977 u16 display_toggle:1; 1978 u16 thinklight_toggle:1; 1979 u16 hibernate_toggle:1; 1980 u16 displayexp_toggle:1; 1981 u16 display_state:1; 1982 u16 brightness_toggle:1; 1983 u16 volume_toggle:1; 1984 u16 mute:1; 1985 1986 u8 brightness_level; 1987 u8 volume_level; 1988 }; 1989 1990 /* kthread for the hotkey poller */ 1991 static struct task_struct *tpacpi_hotkey_task; 1992 1993 /* 1994 * Acquire mutex to write poller control variables as an 1995 * atomic block. 1996 * 1997 * Increment hotkey_config_change when changing them if you 1998 * want the kthread to forget old state. 1999 * 2000 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2001 */ 2002 static struct mutex hotkey_thread_data_mutex; 2003 static unsigned int hotkey_config_change; 2004 2005 /* 2006 * hotkey poller control variables 2007 * 2008 * Must be atomic or readers will also need to acquire mutex 2009 * 2010 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2011 * should be used only when the changes need to be taken as 2012 * a block, OR when one needs to force the kthread to forget 2013 * old state. 2014 */ 2015 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2016 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2017 2018 #define HOTKEY_CONFIG_CRITICAL_START \ 2019 do { \ 2020 mutex_lock(&hotkey_thread_data_mutex); \ 2021 hotkey_config_change++; \ 2022 } while (0); 2023 #define HOTKEY_CONFIG_CRITICAL_END \ 2024 mutex_unlock(&hotkey_thread_data_mutex); 2025 2026 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2027 2028 #define hotkey_source_mask 0U 2029 #define HOTKEY_CONFIG_CRITICAL_START 2030 #define HOTKEY_CONFIG_CRITICAL_END 2031 2032 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2033 2034 static struct mutex hotkey_mutex; 2035 2036 static enum { /* Reasons for waking up */ 2037 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2038 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2039 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2040 } hotkey_wakeup_reason; 2041 2042 static int hotkey_autosleep_ack; 2043 2044 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2045 static u32 hotkey_all_mask; /* all events supported in fw */ 2046 static u32 hotkey_reserved_mask; /* events better left disabled */ 2047 static u32 hotkey_driver_mask; /* events needed by the driver */ 2048 static u32 hotkey_user_mask; /* events visible to userspace */ 2049 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2050 2051 static u16 *hotkey_keycode_map; 2052 2053 static struct attribute_set *hotkey_dev_attributes; 2054 2055 static void tpacpi_driver_event(const unsigned int hkey_event); 2056 static void hotkey_driver_event(const unsigned int scancode); 2057 static void hotkey_poll_setup(const bool may_warn); 2058 2059 /* HKEY.MHKG() return bits */ 2060 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2061 2062 static int hotkey_get_wlsw(void) 2063 { 2064 int status; 2065 2066 if (!tp_features.hotkey_wlsw) 2067 return -ENODEV; 2068 2069 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2070 if (dbg_wlswemul) 2071 return (tpacpi_wlsw_emulstate) ? 2072 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2073 #endif 2074 2075 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2076 return -EIO; 2077 2078 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2079 } 2080 2081 static int hotkey_get_tablet_mode(int *status) 2082 { 2083 int s; 2084 2085 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2086 return -EIO; 2087 2088 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2089 return 0; 2090 } 2091 2092 /* 2093 * Reads current event mask from firmware, and updates 2094 * hotkey_acpi_mask accordingly. Also resets any bits 2095 * from hotkey_user_mask that are unavailable to be 2096 * delivered (shadow requirement of the userspace ABI). 2097 * 2098 * Call with hotkey_mutex held 2099 */ 2100 static int hotkey_mask_get(void) 2101 { 2102 if (tp_features.hotkey_mask) { 2103 u32 m = 0; 2104 2105 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2106 return -EIO; 2107 2108 hotkey_acpi_mask = m; 2109 } else { 2110 /* no mask support doesn't mean no event support... */ 2111 hotkey_acpi_mask = hotkey_all_mask; 2112 } 2113 2114 /* sync userspace-visible mask */ 2115 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2116 2117 return 0; 2118 } 2119 2120 static void hotkey_mask_warn_incomplete_mask(void) 2121 { 2122 /* log only what the user can fix... */ 2123 const u32 wantedmask = hotkey_driver_mask & 2124 ~(hotkey_acpi_mask | hotkey_source_mask) & 2125 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2126 2127 if (wantedmask) 2128 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2129 } 2130 2131 /* 2132 * Set the firmware mask when supported 2133 * 2134 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2135 * 2136 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2137 * 2138 * Call with hotkey_mutex held 2139 */ 2140 static int hotkey_mask_set(u32 mask) 2141 { 2142 int i; 2143 int rc = 0; 2144 2145 const u32 fwmask = mask & ~hotkey_source_mask; 2146 2147 if (tp_features.hotkey_mask) { 2148 for (i = 0; i < 32; i++) { 2149 if (!acpi_evalf(hkey_handle, 2150 NULL, "MHKM", "vdd", i + 1, 2151 !!(mask & (1 << i)))) { 2152 rc = -EIO; 2153 break; 2154 } 2155 } 2156 } 2157 2158 /* 2159 * We *must* make an inconditional call to hotkey_mask_get to 2160 * refresh hotkey_acpi_mask and update hotkey_user_mask 2161 * 2162 * Take the opportunity to also log when we cannot _enable_ 2163 * a given event. 2164 */ 2165 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2166 pr_notice("asked for hotkey mask 0x%08x, but " 2167 "firmware forced it to 0x%08x\n", 2168 fwmask, hotkey_acpi_mask); 2169 } 2170 2171 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2172 hotkey_mask_warn_incomplete_mask(); 2173 2174 return rc; 2175 } 2176 2177 /* 2178 * Sets hotkey_user_mask and tries to set the firmware mask 2179 * 2180 * Call with hotkey_mutex held 2181 */ 2182 static int hotkey_user_mask_set(const u32 mask) 2183 { 2184 int rc; 2185 2186 /* Give people a chance to notice they are doing something that 2187 * is bound to go boom on their users sooner or later */ 2188 if (!tp_warned.hotkey_mask_ff && 2189 (mask == 0xffff || mask == 0xffffff || 2190 mask == 0xffffffff)) { 2191 tp_warned.hotkey_mask_ff = 1; 2192 pr_notice("setting the hotkey mask to 0x%08x is likely " 2193 "not the best way to go about it\n", mask); 2194 pr_notice("please consider using the driver defaults, " 2195 "and refer to up-to-date thinkpad-acpi " 2196 "documentation\n"); 2197 } 2198 2199 /* Try to enable what the user asked for, plus whatever we need. 2200 * this syncs everything but won't enable bits in hotkey_user_mask */ 2201 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2202 2203 /* Enable the available bits in hotkey_user_mask */ 2204 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2205 2206 return rc; 2207 } 2208 2209 /* 2210 * Sets the driver hotkey mask. 2211 * 2212 * Can be called even if the hotkey subdriver is inactive 2213 */ 2214 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2215 { 2216 int rc; 2217 2218 /* Do the right thing if hotkey_init has not been called yet */ 2219 if (!tp_features.hotkey) { 2220 hotkey_driver_mask = mask; 2221 return 0; 2222 } 2223 2224 mutex_lock(&hotkey_mutex); 2225 2226 HOTKEY_CONFIG_CRITICAL_START 2227 hotkey_driver_mask = mask; 2228 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2229 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2230 #endif 2231 HOTKEY_CONFIG_CRITICAL_END 2232 2233 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2234 ~hotkey_source_mask); 2235 hotkey_poll_setup(true); 2236 2237 mutex_unlock(&hotkey_mutex); 2238 2239 return rc; 2240 } 2241 2242 static int hotkey_status_get(int *status) 2243 { 2244 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2245 return -EIO; 2246 2247 return 0; 2248 } 2249 2250 static int hotkey_status_set(bool enable) 2251 { 2252 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2253 return -EIO; 2254 2255 return 0; 2256 } 2257 2258 static void tpacpi_input_send_tabletsw(void) 2259 { 2260 int state; 2261 2262 if (tp_features.hotkey_tablet && 2263 !hotkey_get_tablet_mode(&state)) { 2264 mutex_lock(&tpacpi_inputdev_send_mutex); 2265 2266 input_report_switch(tpacpi_inputdev, 2267 SW_TABLET_MODE, !!state); 2268 input_sync(tpacpi_inputdev); 2269 2270 mutex_unlock(&tpacpi_inputdev_send_mutex); 2271 } 2272 } 2273 2274 /* Do NOT call without validating scancode first */ 2275 static void tpacpi_input_send_key(const unsigned int scancode) 2276 { 2277 const unsigned int keycode = hotkey_keycode_map[scancode]; 2278 2279 if (keycode != KEY_RESERVED) { 2280 mutex_lock(&tpacpi_inputdev_send_mutex); 2281 2282 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2283 input_report_key(tpacpi_inputdev, keycode, 1); 2284 input_sync(tpacpi_inputdev); 2285 2286 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2287 input_report_key(tpacpi_inputdev, keycode, 0); 2288 input_sync(tpacpi_inputdev); 2289 2290 mutex_unlock(&tpacpi_inputdev_send_mutex); 2291 } 2292 } 2293 2294 /* Do NOT call without validating scancode first */ 2295 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2296 { 2297 hotkey_driver_event(scancode); 2298 if (hotkey_user_mask & (1 << scancode)) 2299 tpacpi_input_send_key(scancode); 2300 } 2301 2302 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2303 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2304 2305 /* Do NOT call without validating scancode first */ 2306 static void tpacpi_hotkey_send_key(unsigned int scancode) 2307 { 2308 tpacpi_input_send_key_masked(scancode); 2309 } 2310 2311 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2312 { 2313 u8 d; 2314 2315 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2316 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2317 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2318 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2319 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2320 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2321 } 2322 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2323 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2324 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2325 } 2326 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2327 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2328 n->displayexp_toggle = 2329 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2330 } 2331 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2332 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2333 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2334 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2335 n->brightness_toggle = 2336 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2337 } 2338 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2339 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2340 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2341 >> TP_NVRAM_POS_LEVEL_VOLUME; 2342 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2343 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2344 } 2345 } 2346 2347 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2348 do { \ 2349 if ((event_mask & (1 << __scancode)) && \ 2350 oldn->__member != newn->__member) \ 2351 tpacpi_hotkey_send_key(__scancode); \ 2352 } while (0) 2353 2354 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2355 do { \ 2356 if (event_mask & (1 << __scancode)) \ 2357 tpacpi_hotkey_send_key(__scancode); \ 2358 } while (0) 2359 2360 static void issue_volchange(const unsigned int oldvol, 2361 const unsigned int newvol, 2362 const u32 event_mask) 2363 { 2364 unsigned int i = oldvol; 2365 2366 while (i > newvol) { 2367 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2368 i--; 2369 } 2370 while (i < newvol) { 2371 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2372 i++; 2373 } 2374 } 2375 2376 static void issue_brightnesschange(const unsigned int oldbrt, 2377 const unsigned int newbrt, 2378 const u32 event_mask) 2379 { 2380 unsigned int i = oldbrt; 2381 2382 while (i > newbrt) { 2383 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2384 i--; 2385 } 2386 while (i < newbrt) { 2387 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2388 i++; 2389 } 2390 } 2391 2392 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2393 struct tp_nvram_state *newn, 2394 const u32 event_mask) 2395 { 2396 2397 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2398 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2399 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2400 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2401 2402 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2403 2404 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2405 2406 /* 2407 * Handle volume 2408 * 2409 * This code is supposed to duplicate the IBM firmware behaviour: 2410 * - Pressing MUTE issues mute hotkey message, even when already mute 2411 * - Pressing Volume up/down issues volume up/down hotkey messages, 2412 * even when already at maximum or minimum volume 2413 * - The act of unmuting issues volume up/down notification, 2414 * depending which key was used to unmute 2415 * 2416 * We are constrained to what the NVRAM can tell us, which is not much 2417 * and certainly not enough if more than one volume hotkey was pressed 2418 * since the last poll cycle. 2419 * 2420 * Just to make our life interesting, some newer Lenovo ThinkPads have 2421 * bugs in the BIOS and may fail to update volume_toggle properly. 2422 */ 2423 if (newn->mute) { 2424 /* muted */ 2425 if (!oldn->mute || 2426 oldn->volume_toggle != newn->volume_toggle || 2427 oldn->volume_level != newn->volume_level) { 2428 /* recently muted, or repeated mute keypress, or 2429 * multiple presses ending in mute */ 2430 issue_volchange(oldn->volume_level, newn->volume_level, 2431 event_mask); 2432 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2433 } 2434 } else { 2435 /* unmute */ 2436 if (oldn->mute) { 2437 /* recently unmuted, issue 'unmute' keypress */ 2438 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2439 } 2440 if (oldn->volume_level != newn->volume_level) { 2441 issue_volchange(oldn->volume_level, newn->volume_level, 2442 event_mask); 2443 } else if (oldn->volume_toggle != newn->volume_toggle) { 2444 /* repeated vol up/down keypress at end of scale ? */ 2445 if (newn->volume_level == 0) 2446 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2447 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2448 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2449 } 2450 } 2451 2452 /* handle brightness */ 2453 if (oldn->brightness_level != newn->brightness_level) { 2454 issue_brightnesschange(oldn->brightness_level, 2455 newn->brightness_level, event_mask); 2456 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2457 /* repeated key presses that didn't change state */ 2458 if (newn->brightness_level == 0) 2459 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2460 else if (newn->brightness_level >= bright_maxlvl 2461 && !tp_features.bright_unkfw) 2462 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2463 } 2464 2465 #undef TPACPI_COMPARE_KEY 2466 #undef TPACPI_MAY_SEND_KEY 2467 } 2468 2469 /* 2470 * Polling driver 2471 * 2472 * We track all events in hotkey_source_mask all the time, since 2473 * most of them are edge-based. We only issue those requested by 2474 * hotkey_user_mask or hotkey_driver_mask, though. 2475 */ 2476 static int hotkey_kthread(void *data) 2477 { 2478 struct tp_nvram_state s[2]; 2479 u32 poll_mask, event_mask; 2480 unsigned int si, so; 2481 unsigned long t; 2482 unsigned int change_detector; 2483 unsigned int poll_freq; 2484 bool was_frozen; 2485 2486 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2487 goto exit; 2488 2489 set_freezable(); 2490 2491 so = 0; 2492 si = 1; 2493 t = 0; 2494 2495 /* Initial state for compares */ 2496 mutex_lock(&hotkey_thread_data_mutex); 2497 change_detector = hotkey_config_change; 2498 poll_mask = hotkey_source_mask; 2499 event_mask = hotkey_source_mask & 2500 (hotkey_driver_mask | hotkey_user_mask); 2501 poll_freq = hotkey_poll_freq; 2502 mutex_unlock(&hotkey_thread_data_mutex); 2503 hotkey_read_nvram(&s[so], poll_mask); 2504 2505 while (!kthread_should_stop()) { 2506 if (t == 0) { 2507 if (likely(poll_freq)) 2508 t = 1000/poll_freq; 2509 else 2510 t = 100; /* should never happen... */ 2511 } 2512 t = msleep_interruptible(t); 2513 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2514 break; 2515 2516 if (t > 0 && !was_frozen) 2517 continue; 2518 2519 mutex_lock(&hotkey_thread_data_mutex); 2520 if (was_frozen || hotkey_config_change != change_detector) { 2521 /* forget old state on thaw or config change */ 2522 si = so; 2523 t = 0; 2524 change_detector = hotkey_config_change; 2525 } 2526 poll_mask = hotkey_source_mask; 2527 event_mask = hotkey_source_mask & 2528 (hotkey_driver_mask | hotkey_user_mask); 2529 poll_freq = hotkey_poll_freq; 2530 mutex_unlock(&hotkey_thread_data_mutex); 2531 2532 if (likely(poll_mask)) { 2533 hotkey_read_nvram(&s[si], poll_mask); 2534 if (likely(si != so)) { 2535 hotkey_compare_and_issue_event(&s[so], &s[si], 2536 event_mask); 2537 } 2538 } 2539 2540 so = si; 2541 si ^= 1; 2542 } 2543 2544 exit: 2545 return 0; 2546 } 2547 2548 /* call with hotkey_mutex held */ 2549 static void hotkey_poll_stop_sync(void) 2550 { 2551 if (tpacpi_hotkey_task) { 2552 kthread_stop(tpacpi_hotkey_task); 2553 tpacpi_hotkey_task = NULL; 2554 } 2555 } 2556 2557 /* call with hotkey_mutex held */ 2558 static void hotkey_poll_setup(const bool may_warn) 2559 { 2560 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2561 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2562 2563 if (hotkey_poll_freq > 0 && 2564 (poll_driver_mask || 2565 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2566 if (!tpacpi_hotkey_task) { 2567 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2568 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2569 if (IS_ERR(tpacpi_hotkey_task)) { 2570 tpacpi_hotkey_task = NULL; 2571 pr_err("could not create kernel thread " 2572 "for hotkey polling\n"); 2573 } 2574 } 2575 } else { 2576 hotkey_poll_stop_sync(); 2577 if (may_warn && (poll_driver_mask || poll_user_mask) && 2578 hotkey_poll_freq == 0) { 2579 pr_notice("hot keys 0x%08x and/or events 0x%08x " 2580 "require polling, which is currently " 2581 "disabled\n", 2582 poll_user_mask, poll_driver_mask); 2583 } 2584 } 2585 } 2586 2587 static void hotkey_poll_setup_safe(const bool may_warn) 2588 { 2589 mutex_lock(&hotkey_mutex); 2590 hotkey_poll_setup(may_warn); 2591 mutex_unlock(&hotkey_mutex); 2592 } 2593 2594 /* call with hotkey_mutex held */ 2595 static void hotkey_poll_set_freq(unsigned int freq) 2596 { 2597 if (!freq) 2598 hotkey_poll_stop_sync(); 2599 2600 hotkey_poll_freq = freq; 2601 } 2602 2603 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2604 2605 static void hotkey_poll_setup(const bool __unused) 2606 { 2607 } 2608 2609 static void hotkey_poll_setup_safe(const bool __unused) 2610 { 2611 } 2612 2613 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2614 2615 static int hotkey_inputdev_open(struct input_dev *dev) 2616 { 2617 switch (tpacpi_lifecycle) { 2618 case TPACPI_LIFE_INIT: 2619 case TPACPI_LIFE_RUNNING: 2620 hotkey_poll_setup_safe(false); 2621 return 0; 2622 case TPACPI_LIFE_EXITING: 2623 return -EBUSY; 2624 } 2625 2626 /* Should only happen if tpacpi_lifecycle is corrupt */ 2627 BUG(); 2628 return -EBUSY; 2629 } 2630 2631 static void hotkey_inputdev_close(struct input_dev *dev) 2632 { 2633 /* disable hotkey polling when possible */ 2634 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2635 !(hotkey_source_mask & hotkey_driver_mask)) 2636 hotkey_poll_setup_safe(false); 2637 } 2638 2639 /* sysfs hotkey enable ------------------------------------------------- */ 2640 static ssize_t hotkey_enable_show(struct device *dev, 2641 struct device_attribute *attr, 2642 char *buf) 2643 { 2644 int res, status; 2645 2646 printk_deprecated_attribute("hotkey_enable", 2647 "Hotkey reporting is always enabled"); 2648 2649 res = hotkey_status_get(&status); 2650 if (res) 2651 return res; 2652 2653 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2654 } 2655 2656 static ssize_t hotkey_enable_store(struct device *dev, 2657 struct device_attribute *attr, 2658 const char *buf, size_t count) 2659 { 2660 unsigned long t; 2661 2662 printk_deprecated_attribute("hotkey_enable", 2663 "Hotkeys can be disabled through hotkey_mask"); 2664 2665 if (parse_strtoul(buf, 1, &t)) 2666 return -EINVAL; 2667 2668 if (t == 0) 2669 return -EPERM; 2670 2671 return count; 2672 } 2673 2674 static DEVICE_ATTR_RW(hotkey_enable); 2675 2676 /* sysfs hotkey mask --------------------------------------------------- */ 2677 static ssize_t hotkey_mask_show(struct device *dev, 2678 struct device_attribute *attr, 2679 char *buf) 2680 { 2681 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2682 } 2683 2684 static ssize_t hotkey_mask_store(struct device *dev, 2685 struct device_attribute *attr, 2686 const char *buf, size_t count) 2687 { 2688 unsigned long t; 2689 int res; 2690 2691 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2692 return -EINVAL; 2693 2694 if (mutex_lock_killable(&hotkey_mutex)) 2695 return -ERESTARTSYS; 2696 2697 res = hotkey_user_mask_set(t); 2698 2699 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2700 hotkey_poll_setup(true); 2701 #endif 2702 2703 mutex_unlock(&hotkey_mutex); 2704 2705 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2706 2707 return (res) ? res : count; 2708 } 2709 2710 static DEVICE_ATTR_RW(hotkey_mask); 2711 2712 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2713 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2714 struct device_attribute *attr, 2715 char *buf) 2716 { 2717 return sprintf(buf, "0\n"); 2718 } 2719 2720 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2721 2722 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2723 static ssize_t hotkey_bios_mask_show(struct device *dev, 2724 struct device_attribute *attr, 2725 char *buf) 2726 { 2727 printk_deprecated_attribute("hotkey_bios_mask", 2728 "This attribute is useless."); 2729 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2730 } 2731 2732 static DEVICE_ATTR_RO(hotkey_bios_mask); 2733 2734 /* sysfs hotkey all_mask ----------------------------------------------- */ 2735 static ssize_t hotkey_all_mask_show(struct device *dev, 2736 struct device_attribute *attr, 2737 char *buf) 2738 { 2739 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2740 hotkey_all_mask | hotkey_source_mask); 2741 } 2742 2743 static DEVICE_ATTR_RO(hotkey_all_mask); 2744 2745 /* sysfs hotkey recommended_mask --------------------------------------- */ 2746 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2747 struct device_attribute *attr, 2748 char *buf) 2749 { 2750 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2751 (hotkey_all_mask | hotkey_source_mask) 2752 & ~hotkey_reserved_mask); 2753 } 2754 2755 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2756 2757 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2758 2759 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2760 static ssize_t hotkey_source_mask_show(struct device *dev, 2761 struct device_attribute *attr, 2762 char *buf) 2763 { 2764 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2765 } 2766 2767 static ssize_t hotkey_source_mask_store(struct device *dev, 2768 struct device_attribute *attr, 2769 const char *buf, size_t count) 2770 { 2771 unsigned long t; 2772 u32 r_ev; 2773 int rc; 2774 2775 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2776 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2777 return -EINVAL; 2778 2779 if (mutex_lock_killable(&hotkey_mutex)) 2780 return -ERESTARTSYS; 2781 2782 HOTKEY_CONFIG_CRITICAL_START 2783 hotkey_source_mask = t; 2784 HOTKEY_CONFIG_CRITICAL_END 2785 2786 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2787 ~hotkey_source_mask); 2788 hotkey_poll_setup(true); 2789 2790 /* check if events needed by the driver got disabled */ 2791 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2792 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2793 2794 mutex_unlock(&hotkey_mutex); 2795 2796 if (rc < 0) 2797 pr_err("hotkey_source_mask: " 2798 "failed to update the firmware event mask!\n"); 2799 2800 if (r_ev) 2801 pr_notice("hotkey_source_mask: " 2802 "some important events were disabled: 0x%04x\n", 2803 r_ev); 2804 2805 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2806 2807 return (rc < 0) ? rc : count; 2808 } 2809 2810 static DEVICE_ATTR_RW(hotkey_source_mask); 2811 2812 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2813 static ssize_t hotkey_poll_freq_show(struct device *dev, 2814 struct device_attribute *attr, 2815 char *buf) 2816 { 2817 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2818 } 2819 2820 static ssize_t hotkey_poll_freq_store(struct device *dev, 2821 struct device_attribute *attr, 2822 const char *buf, size_t count) 2823 { 2824 unsigned long t; 2825 2826 if (parse_strtoul(buf, 25, &t)) 2827 return -EINVAL; 2828 2829 if (mutex_lock_killable(&hotkey_mutex)) 2830 return -ERESTARTSYS; 2831 2832 hotkey_poll_set_freq(t); 2833 hotkey_poll_setup(true); 2834 2835 mutex_unlock(&hotkey_mutex); 2836 2837 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2838 2839 return count; 2840 } 2841 2842 static DEVICE_ATTR_RW(hotkey_poll_freq); 2843 2844 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2845 2846 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2847 static ssize_t hotkey_radio_sw_show(struct device *dev, 2848 struct device_attribute *attr, 2849 char *buf) 2850 { 2851 int res; 2852 res = hotkey_get_wlsw(); 2853 if (res < 0) 2854 return res; 2855 2856 /* Opportunistic update */ 2857 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2858 2859 return snprintf(buf, PAGE_SIZE, "%d\n", 2860 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2861 } 2862 2863 static DEVICE_ATTR_RO(hotkey_radio_sw); 2864 2865 static void hotkey_radio_sw_notify_change(void) 2866 { 2867 if (tp_features.hotkey_wlsw) 2868 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2869 "hotkey_radio_sw"); 2870 } 2871 2872 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2873 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2874 struct device_attribute *attr, 2875 char *buf) 2876 { 2877 int res, s; 2878 res = hotkey_get_tablet_mode(&s); 2879 if (res < 0) 2880 return res; 2881 2882 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2883 } 2884 2885 static DEVICE_ATTR_RO(hotkey_tablet_mode); 2886 2887 static void hotkey_tablet_mode_notify_change(void) 2888 { 2889 if (tp_features.hotkey_tablet) 2890 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2891 "hotkey_tablet_mode"); 2892 } 2893 2894 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2895 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2896 struct device_attribute *attr, 2897 char *buf) 2898 { 2899 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2900 } 2901 2902 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2903 2904 static void hotkey_wakeup_reason_notify_change(void) 2905 { 2906 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2907 "wakeup_reason"); 2908 } 2909 2910 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2911 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2912 struct device_attribute *attr, 2913 char *buf) 2914 { 2915 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2916 } 2917 2918 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 2919 hotkey_wakeup_hotunplug_complete_show, NULL); 2920 2921 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2922 { 2923 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2924 "wakeup_hotunplug_complete"); 2925 } 2926 2927 /* sysfs adaptive kbd mode --------------------------------------------- */ 2928 2929 static int adaptive_keyboard_get_mode(void); 2930 static int adaptive_keyboard_set_mode(int new_mode); 2931 2932 enum ADAPTIVE_KEY_MODE { 2933 HOME_MODE, 2934 WEB_BROWSER_MODE, 2935 WEB_CONFERENCE_MODE, 2936 FUNCTION_MODE, 2937 LAYFLAT_MODE 2938 }; 2939 2940 static ssize_t adaptive_kbd_mode_show(struct device *dev, 2941 struct device_attribute *attr, 2942 char *buf) 2943 { 2944 int current_mode; 2945 2946 current_mode = adaptive_keyboard_get_mode(); 2947 if (current_mode < 0) 2948 return current_mode; 2949 2950 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 2951 } 2952 2953 static ssize_t adaptive_kbd_mode_store(struct device *dev, 2954 struct device_attribute *attr, 2955 const char *buf, size_t count) 2956 { 2957 unsigned long t; 2958 int res; 2959 2960 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 2961 return -EINVAL; 2962 2963 res = adaptive_keyboard_set_mode(t); 2964 return (res < 0) ? res : count; 2965 } 2966 2967 static DEVICE_ATTR_RW(adaptive_kbd_mode); 2968 2969 static struct attribute *adaptive_kbd_attributes[] = { 2970 &dev_attr_adaptive_kbd_mode.attr, 2971 NULL 2972 }; 2973 2974 static const struct attribute_group adaptive_kbd_attr_group = { 2975 .attrs = adaptive_kbd_attributes, 2976 }; 2977 2978 /* --------------------------------------------------------------------- */ 2979 2980 static struct attribute *hotkey_attributes[] __initdata = { 2981 &dev_attr_hotkey_enable.attr, 2982 &dev_attr_hotkey_bios_enabled.attr, 2983 &dev_attr_hotkey_bios_mask.attr, 2984 &dev_attr_wakeup_reason.attr, 2985 &dev_attr_wakeup_hotunplug_complete.attr, 2986 &dev_attr_hotkey_mask.attr, 2987 &dev_attr_hotkey_all_mask.attr, 2988 &dev_attr_hotkey_recommended_mask.attr, 2989 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2990 &dev_attr_hotkey_source_mask.attr, 2991 &dev_attr_hotkey_poll_freq.attr, 2992 #endif 2993 }; 2994 2995 /* 2996 * Sync both the hw and sw blocking state of all switches 2997 */ 2998 static void tpacpi_send_radiosw_update(void) 2999 { 3000 int wlsw; 3001 3002 /* 3003 * We must sync all rfkill controllers *before* issuing any 3004 * rfkill input events, or we will race the rfkill core input 3005 * handler. 3006 * 3007 * tpacpi_inputdev_send_mutex works as a synchronization point 3008 * for the above. 3009 * 3010 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3011 */ 3012 3013 wlsw = hotkey_get_wlsw(); 3014 3015 /* Sync hw blocking state first if it is hw-blocked */ 3016 if (wlsw == TPACPI_RFK_RADIO_OFF) 3017 tpacpi_rfk_update_hwblock_state(true); 3018 3019 /* Sync sw blocking state */ 3020 tpacpi_rfk_update_swstate_all(); 3021 3022 /* Sync hw blocking state last if it is hw-unblocked */ 3023 if (wlsw == TPACPI_RFK_RADIO_ON) 3024 tpacpi_rfk_update_hwblock_state(false); 3025 3026 /* Issue rfkill input event for WLSW switch */ 3027 if (!(wlsw < 0)) { 3028 mutex_lock(&tpacpi_inputdev_send_mutex); 3029 3030 input_report_switch(tpacpi_inputdev, 3031 SW_RFKILL_ALL, (wlsw > 0)); 3032 input_sync(tpacpi_inputdev); 3033 3034 mutex_unlock(&tpacpi_inputdev_send_mutex); 3035 } 3036 3037 /* 3038 * this can be unconditional, as we will poll state again 3039 * if userspace uses the notify to read data 3040 */ 3041 hotkey_radio_sw_notify_change(); 3042 } 3043 3044 static void hotkey_exit(void) 3045 { 3046 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3047 mutex_lock(&hotkey_mutex); 3048 hotkey_poll_stop_sync(); 3049 mutex_unlock(&hotkey_mutex); 3050 #endif 3051 3052 if (hotkey_dev_attributes) 3053 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3054 3055 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3056 "restoring original HKEY status and mask\n"); 3057 /* yes, there is a bitwise or below, we want the 3058 * functions to be called even if one of them fail */ 3059 if (((tp_features.hotkey_mask && 3060 hotkey_mask_set(hotkey_orig_mask)) | 3061 hotkey_status_set(false)) != 0) 3062 pr_err("failed to restore hot key mask " 3063 "to BIOS defaults\n"); 3064 } 3065 3066 static void __init hotkey_unmap(const unsigned int scancode) 3067 { 3068 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3069 clear_bit(hotkey_keycode_map[scancode], 3070 tpacpi_inputdev->keybit); 3071 hotkey_keycode_map[scancode] = KEY_RESERVED; 3072 } 3073 } 3074 3075 /* 3076 * HKEY quirks: 3077 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3078 */ 3079 3080 #define TPACPI_HK_Q_INIMASK 0x0001 3081 3082 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3083 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3084 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3085 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3086 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3087 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3088 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3089 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3090 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3091 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3092 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3093 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3094 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3095 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3096 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3097 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3098 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3099 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3100 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3101 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3102 }; 3103 3104 typedef u16 tpacpi_keymap_entry_t; 3105 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3106 3107 static int __init hotkey_init(struct ibm_init_struct *iibm) 3108 { 3109 /* Requirements for changing the default keymaps: 3110 * 3111 * 1. Many of the keys are mapped to KEY_RESERVED for very 3112 * good reasons. Do not change them unless you have deep 3113 * knowledge on the IBM and Lenovo ThinkPad firmware for 3114 * the various ThinkPad models. The driver behaves 3115 * differently for KEY_RESERVED: such keys have their 3116 * hot key mask *unset* in mask_recommended, and also 3117 * in the initial hot key mask programmed into the 3118 * firmware at driver load time, which means the firm- 3119 * ware may react very differently if you change them to 3120 * something else; 3121 * 3122 * 2. You must be subscribed to the linux-thinkpad and 3123 * ibm-acpi-devel mailing lists, and you should read the 3124 * list archives since 2007 if you want to change the 3125 * keymaps. This requirement exists so that you will 3126 * know the past history of problems with the thinkpad- 3127 * acpi driver keymaps, and also that you will be 3128 * listening to any bug reports; 3129 * 3130 * 3. Do not send thinkpad-acpi specific patches directly to 3131 * for merging, *ever*. Send them to the linux-acpi 3132 * mailinglist for comments. Merging is to be done only 3133 * through acpi-test and the ACPI maintainer. 3134 * 3135 * If the above is too much to ask, don't change the keymap. 3136 * Ask the thinkpad-acpi maintainer to do it, instead. 3137 */ 3138 3139 enum keymap_index { 3140 TPACPI_KEYMAP_IBM_GENERIC = 0, 3141 TPACPI_KEYMAP_LENOVO_GENERIC, 3142 }; 3143 3144 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3145 /* Generic keymap for IBM ThinkPads */ 3146 [TPACPI_KEYMAP_IBM_GENERIC] = { 3147 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3148 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3149 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3150 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3151 3152 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3153 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3154 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3155 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3156 3157 /* brightness: firmware always reacts to them */ 3158 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3159 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3160 3161 /* Thinklight: firmware always react to it */ 3162 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3163 3164 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3165 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3166 3167 /* Volume: firmware always react to it and reprograms 3168 * the built-in *extra* mixer. Never map it to control 3169 * another mixer by default. */ 3170 KEY_RESERVED, /* 0x14: VOLUME UP */ 3171 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3172 KEY_RESERVED, /* 0x16: MUTE */ 3173 3174 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3175 3176 /* (assignments unknown, please report if found) */ 3177 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3178 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3179 3180 /* No assignments, only used for Adaptive keyboards. */ 3181 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3182 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3183 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3184 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3185 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3186 }, 3187 3188 /* Generic keymap for Lenovo ThinkPads */ 3189 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3190 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3191 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3192 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3193 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3194 3195 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3196 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3197 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3198 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3199 3200 /* These should be enabled --only-- when ACPI video 3201 * is disabled (i.e. in "vendor" mode), and are handled 3202 * in a special way by the init code */ 3203 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3204 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3205 3206 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3207 3208 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3209 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3210 3211 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3212 * react to it and reprograms the built-in *extra* mixer. 3213 * Never map it to control another mixer by default. 3214 * 3215 * T60?, T61, R60?, R61: firmware and EC tries to send 3216 * these over the regular keyboard, so these are no-ops, 3217 * but there are still weird bugs re. MUTE, so do not 3218 * change unless you get test reports from all Lenovo 3219 * models. May cause the BIOS to interfere with the 3220 * HDA mixer. 3221 */ 3222 KEY_RESERVED, /* 0x14: VOLUME UP */ 3223 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3224 KEY_RESERVED, /* 0x16: MUTE */ 3225 3226 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3227 3228 /* (assignments unknown, please report if found) */ 3229 KEY_UNKNOWN, KEY_UNKNOWN, 3230 3231 /* 3232 * The mic mute button only sends 0x1a. It does not 3233 * automatically mute the mic or change the mute light. 3234 */ 3235 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3236 3237 /* (assignments unknown, please report if found) */ 3238 KEY_UNKNOWN, 3239 3240 /* Extra keys in use since the X240 / T440 / T540 */ 3241 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3242 3243 /* 3244 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3245 * The first item in this list is the Mute button which is 3246 * emitted with 0x103 through 3247 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3248 * symbol is held. 3249 * We'll need to offset those by 0x20. 3250 */ 3251 KEY_RESERVED, /* Mute held, 0x103 */ 3252 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3253 KEY_RESERVED, /* Clipping tool */ 3254 KEY_RESERVED, /* Cloud */ 3255 KEY_RESERVED, 3256 KEY_VOICECOMMAND, /* Voice */ 3257 KEY_RESERVED, 3258 KEY_RESERVED, /* Gestures */ 3259 KEY_RESERVED, 3260 KEY_RESERVED, 3261 KEY_RESERVED, 3262 KEY_CONFIG, /* Settings */ 3263 KEY_RESERVED, /* New tab */ 3264 KEY_REFRESH, /* Reload */ 3265 KEY_BACK, /* Back */ 3266 KEY_RESERVED, /* Microphone down */ 3267 KEY_RESERVED, /* Microphone up */ 3268 KEY_RESERVED, /* Microphone cancellation */ 3269 KEY_RESERVED, /* Camera mode */ 3270 KEY_RESERVED, /* Rotate display, 0x116 */ 3271 }, 3272 }; 3273 3274 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3275 /* Generic maps (fallback) */ 3276 { 3277 .vendor = PCI_VENDOR_ID_IBM, 3278 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3279 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3280 }, 3281 { 3282 .vendor = PCI_VENDOR_ID_LENOVO, 3283 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3284 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3285 }, 3286 }; 3287 3288 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3289 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3290 3291 int res, i; 3292 int status; 3293 int hkeyv; 3294 bool radiosw_state = false; 3295 bool tabletsw_state = false; 3296 3297 unsigned long quirks; 3298 unsigned long keymap_id; 3299 3300 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3301 "initializing hotkey subdriver\n"); 3302 3303 BUG_ON(!tpacpi_inputdev); 3304 BUG_ON(tpacpi_inputdev->open != NULL || 3305 tpacpi_inputdev->close != NULL); 3306 3307 TPACPI_ACPIHANDLE_INIT(hkey); 3308 mutex_init(&hotkey_mutex); 3309 3310 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3311 mutex_init(&hotkey_thread_data_mutex); 3312 #endif 3313 3314 /* hotkey not supported on 570 */ 3315 tp_features.hotkey = hkey_handle != NULL; 3316 3317 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3318 "hotkeys are %s\n", 3319 str_supported(tp_features.hotkey)); 3320 3321 if (!tp_features.hotkey) 3322 return 1; 3323 3324 /* 3325 * Check if we have an adaptive keyboard, like on the 3326 * Lenovo Carbon X1 2014 (2nd Gen). 3327 */ 3328 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3329 if ((hkeyv >> 8) == 2) { 3330 tp_features.has_adaptive_kbd = true; 3331 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 3332 &adaptive_kbd_attr_group); 3333 if (res) 3334 goto err_exit; 3335 } 3336 } 3337 3338 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3339 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3340 3341 tpacpi_disable_brightness_delay(); 3342 3343 /* MUST have enough space for all attributes to be added to 3344 * hotkey_dev_attributes */ 3345 hotkey_dev_attributes = create_attr_set( 3346 ARRAY_SIZE(hotkey_attributes) + 2, 3347 NULL); 3348 if (!hotkey_dev_attributes) 3349 return -ENOMEM; 3350 res = add_many_to_attr_set(hotkey_dev_attributes, 3351 hotkey_attributes, 3352 ARRAY_SIZE(hotkey_attributes)); 3353 if (res) 3354 goto err_exit; 3355 3356 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3357 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3358 for HKEY interface version 0x100 */ 3359 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3360 if ((hkeyv >> 8) != 1) { 3361 pr_err("unknown version of the HKEY interface: 0x%x\n", 3362 hkeyv); 3363 pr_err("please report this to %s\n", TPACPI_MAIL); 3364 } else { 3365 /* 3366 * MHKV 0x100 in A31, R40, R40e, 3367 * T4x, X31, and later 3368 */ 3369 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3370 "firmware HKEY interface version: 0x%x\n", 3371 hkeyv); 3372 3373 /* Paranoia check AND init hotkey_all_mask */ 3374 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3375 "MHKA", "qd")) { 3376 pr_err("missing MHKA handler, " 3377 "please report this to %s\n", 3378 TPACPI_MAIL); 3379 /* Fallback: pre-init for FN+F3,F4,F12 */ 3380 hotkey_all_mask = 0x080cU; 3381 } else { 3382 tp_features.hotkey_mask = 1; 3383 } 3384 } 3385 } 3386 3387 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3388 "hotkey masks are %s\n", 3389 str_supported(tp_features.hotkey_mask)); 3390 3391 /* Init hotkey_all_mask if not initialized yet */ 3392 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3393 (quirks & TPACPI_HK_Q_INIMASK)) 3394 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3395 3396 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3397 if (tp_features.hotkey_mask) { 3398 /* hotkey_source_mask *must* be zero for 3399 * the first hotkey_mask_get to return hotkey_orig_mask */ 3400 res = hotkey_mask_get(); 3401 if (res) 3402 goto err_exit; 3403 3404 hotkey_orig_mask = hotkey_acpi_mask; 3405 } else { 3406 hotkey_orig_mask = hotkey_all_mask; 3407 hotkey_acpi_mask = hotkey_all_mask; 3408 } 3409 3410 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3411 if (dbg_wlswemul) { 3412 tp_features.hotkey_wlsw = 1; 3413 radiosw_state = !!tpacpi_wlsw_emulstate; 3414 pr_info("radio switch emulation enabled\n"); 3415 } else 3416 #endif 3417 /* Not all thinkpads have a hardware radio switch */ 3418 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3419 tp_features.hotkey_wlsw = 1; 3420 radiosw_state = !!status; 3421 pr_info("radio switch found; radios are %s\n", 3422 enabled(status, 0)); 3423 } 3424 if (tp_features.hotkey_wlsw) 3425 res = add_to_attr_set(hotkey_dev_attributes, 3426 &dev_attr_hotkey_radio_sw.attr); 3427 3428 /* For X41t, X60t, X61t Tablets... */ 3429 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3430 tp_features.hotkey_tablet = 1; 3431 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); 3432 pr_info("possible tablet mode switch found; " 3433 "ThinkPad in %s mode\n", 3434 (tabletsw_state) ? "tablet" : "laptop"); 3435 res = add_to_attr_set(hotkey_dev_attributes, 3436 &dev_attr_hotkey_tablet_mode.attr); 3437 } 3438 3439 if (!res) 3440 res = register_attr_set_with_sysfs( 3441 hotkey_dev_attributes, 3442 &tpacpi_pdev->dev.kobj); 3443 if (res) 3444 goto err_exit; 3445 3446 /* Set up key map */ 3447 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3448 GFP_KERNEL); 3449 if (!hotkey_keycode_map) { 3450 pr_err("failed to allocate memory for key map\n"); 3451 res = -ENOMEM; 3452 goto err_exit; 3453 } 3454 3455 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3456 ARRAY_SIZE(tpacpi_keymap_qtable)); 3457 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3458 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3459 "using keymap number %lu\n", keymap_id); 3460 3461 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3462 TPACPI_HOTKEY_MAP_SIZE); 3463 3464 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3465 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3466 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3467 tpacpi_inputdev->keycode = hotkey_keycode_map; 3468 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3469 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3470 input_set_capability(tpacpi_inputdev, EV_KEY, 3471 hotkey_keycode_map[i]); 3472 } else { 3473 if (i < sizeof(hotkey_reserved_mask)*8) 3474 hotkey_reserved_mask |= 1 << i; 3475 } 3476 } 3477 3478 if (tp_features.hotkey_wlsw) { 3479 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3480 input_report_switch(tpacpi_inputdev, 3481 SW_RFKILL_ALL, radiosw_state); 3482 } 3483 if (tp_features.hotkey_tablet) { 3484 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3485 input_report_switch(tpacpi_inputdev, 3486 SW_TABLET_MODE, tabletsw_state); 3487 } 3488 3489 /* Do not issue duplicate brightness change events to 3490 * userspace. tpacpi_detect_brightness_capabilities() must have 3491 * been called before this point */ 3492 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3493 pr_info("This ThinkPad has standard ACPI backlight " 3494 "brightness control, supported by the ACPI " 3495 "video driver\n"); 3496 pr_notice("Disabling thinkpad-acpi brightness events " 3497 "by default...\n"); 3498 3499 /* Disable brightness up/down on Lenovo thinkpads when 3500 * ACPI is handling them, otherwise it is plain impossible 3501 * for userspace to do something even remotely sane */ 3502 hotkey_reserved_mask |= 3503 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3504 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3505 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3506 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3507 } 3508 3509 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3510 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3511 & ~hotkey_all_mask 3512 & ~hotkey_reserved_mask; 3513 3514 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3515 "hotkey source mask 0x%08x, polling freq %u\n", 3516 hotkey_source_mask, hotkey_poll_freq); 3517 #endif 3518 3519 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3520 "enabling firmware HKEY event interface...\n"); 3521 res = hotkey_status_set(true); 3522 if (res) { 3523 hotkey_exit(); 3524 return res; 3525 } 3526 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3527 | hotkey_driver_mask) 3528 & ~hotkey_source_mask); 3529 if (res < 0 && res != -ENXIO) { 3530 hotkey_exit(); 3531 return res; 3532 } 3533 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3534 & ~hotkey_reserved_mask; 3535 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3536 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3537 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3538 3539 tpacpi_inputdev->open = &hotkey_inputdev_open; 3540 tpacpi_inputdev->close = &hotkey_inputdev_close; 3541 3542 hotkey_poll_setup_safe(true); 3543 3544 return 0; 3545 3546 err_exit: 3547 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3548 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3549 &adaptive_kbd_attr_group); 3550 3551 hotkey_dev_attributes = NULL; 3552 3553 return (res < 0) ? res : 1; 3554 } 3555 3556 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3557 * mode, Web conference mode, Function mode and Lay-flat mode. 3558 * We support Home mode and Function mode currently. 3559 * 3560 * Will consider support rest of modes in future. 3561 * 3562 */ 3563 static const int adaptive_keyboard_modes[] = { 3564 HOME_MODE, 3565 /* WEB_BROWSER_MODE = 2, 3566 WEB_CONFERENCE_MODE = 3, */ 3567 FUNCTION_MODE 3568 }; 3569 3570 #define DFR_CHANGE_ROW 0x101 3571 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3572 #define FIRST_ADAPTIVE_KEY 0x103 3573 #define ADAPTIVE_KEY_OFFSET 0x020 3574 3575 /* press Fn key a while second, it will switch to Function Mode. Then 3576 * release Fn key, previous mode be restored. 3577 */ 3578 static bool adaptive_keyboard_mode_is_saved; 3579 static int adaptive_keyboard_prev_mode; 3580 3581 static int adaptive_keyboard_get_mode(void) 3582 { 3583 int mode = 0; 3584 3585 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3586 pr_err("Cannot read adaptive keyboard mode\n"); 3587 return -EIO; 3588 } 3589 3590 return mode; 3591 } 3592 3593 static int adaptive_keyboard_set_mode(int new_mode) 3594 { 3595 if (new_mode < 0 || 3596 new_mode > LAYFLAT_MODE) 3597 return -EINVAL; 3598 3599 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3600 pr_err("Cannot set adaptive keyboard mode\n"); 3601 return -EIO; 3602 } 3603 3604 return 0; 3605 } 3606 3607 static int adaptive_keyboard_get_next_mode(int mode) 3608 { 3609 size_t i; 3610 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3611 3612 for (i = 0; i <= max_mode; i++) { 3613 if (adaptive_keyboard_modes[i] == mode) 3614 break; 3615 } 3616 3617 if (i >= max_mode) 3618 i = 0; 3619 else 3620 i++; 3621 3622 return adaptive_keyboard_modes[i]; 3623 } 3624 3625 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3626 { 3627 int current_mode = 0; 3628 int new_mode = 0; 3629 int keycode; 3630 3631 switch (scancode) { 3632 case DFR_CHANGE_ROW: 3633 if (adaptive_keyboard_mode_is_saved) { 3634 new_mode = adaptive_keyboard_prev_mode; 3635 adaptive_keyboard_mode_is_saved = false; 3636 } else { 3637 current_mode = adaptive_keyboard_get_mode(); 3638 if (current_mode < 0) 3639 return false; 3640 new_mode = adaptive_keyboard_get_next_mode( 3641 current_mode); 3642 } 3643 3644 if (adaptive_keyboard_set_mode(new_mode) < 0) 3645 return false; 3646 3647 return true; 3648 3649 case DFR_SHOW_QUICKVIEW_ROW: 3650 current_mode = adaptive_keyboard_get_mode(); 3651 if (current_mode < 0) 3652 return false; 3653 3654 adaptive_keyboard_prev_mode = current_mode; 3655 adaptive_keyboard_mode_is_saved = true; 3656 3657 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3658 return false; 3659 return true; 3660 3661 default: 3662 if (scancode < FIRST_ADAPTIVE_KEY || 3663 scancode >= FIRST_ADAPTIVE_KEY + TPACPI_HOTKEY_MAP_LEN - 3664 ADAPTIVE_KEY_OFFSET) { 3665 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3666 scancode); 3667 return false; 3668 } 3669 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + ADAPTIVE_KEY_OFFSET]; 3670 if (keycode != KEY_RESERVED) { 3671 mutex_lock(&tpacpi_inputdev_send_mutex); 3672 3673 input_report_key(tpacpi_inputdev, keycode, 1); 3674 input_sync(tpacpi_inputdev); 3675 3676 input_report_key(tpacpi_inputdev, keycode, 0); 3677 input_sync(tpacpi_inputdev); 3678 3679 mutex_unlock(&tpacpi_inputdev_send_mutex); 3680 } 3681 return true; 3682 } 3683 } 3684 3685 static bool hotkey_notify_hotkey(const u32 hkey, 3686 bool *send_acpi_ev, 3687 bool *ignore_acpi_ev) 3688 { 3689 /* 0x1000-0x1FFF: key presses */ 3690 unsigned int scancode = hkey & 0xfff; 3691 *send_acpi_ev = true; 3692 *ignore_acpi_ev = false; 3693 3694 /* HKEY event 0x1001 is scancode 0x00 */ 3695 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3696 scancode--; 3697 if (!(hotkey_source_mask & (1 << scancode))) { 3698 tpacpi_input_send_key_masked(scancode); 3699 *send_acpi_ev = false; 3700 } else { 3701 *ignore_acpi_ev = true; 3702 } 3703 return true; 3704 } else { 3705 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3706 } 3707 return false; 3708 } 3709 3710 static bool hotkey_notify_wakeup(const u32 hkey, 3711 bool *send_acpi_ev, 3712 bool *ignore_acpi_ev) 3713 { 3714 /* 0x2000-0x2FFF: Wakeup reason */ 3715 *send_acpi_ev = true; 3716 *ignore_acpi_ev = false; 3717 3718 switch (hkey) { 3719 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3720 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3721 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3722 *ignore_acpi_ev = true; 3723 break; 3724 3725 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3726 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3727 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3728 *ignore_acpi_ev = true; 3729 break; 3730 3731 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3732 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3733 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3734 /* how to auto-heal: */ 3735 /* 2313: woke up from S3, go to S4/S5 */ 3736 /* 2413: woke up from S4, go to S5 */ 3737 break; 3738 3739 default: 3740 return false; 3741 } 3742 3743 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3744 pr_info("woke up due to a hot-unplug request...\n"); 3745 hotkey_wakeup_reason_notify_change(); 3746 } 3747 return true; 3748 } 3749 3750 static bool hotkey_notify_dockevent(const u32 hkey, 3751 bool *send_acpi_ev, 3752 bool *ignore_acpi_ev) 3753 { 3754 /* 0x4000-0x4FFF: dock-related events */ 3755 *send_acpi_ev = true; 3756 *ignore_acpi_ev = false; 3757 3758 switch (hkey) { 3759 case TP_HKEY_EV_UNDOCK_ACK: 3760 /* ACPI undock operation completed after wakeup */ 3761 hotkey_autosleep_ack = 1; 3762 pr_info("undocked\n"); 3763 hotkey_wakeup_hotunplug_complete_notify_change(); 3764 return true; 3765 3766 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3767 pr_info("docked into hotplug port replicator\n"); 3768 return true; 3769 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3770 pr_info("undocked from hotplug port replicator\n"); 3771 return true; 3772 3773 default: 3774 return false; 3775 } 3776 } 3777 3778 static bool hotkey_notify_usrevent(const u32 hkey, 3779 bool *send_acpi_ev, 3780 bool *ignore_acpi_ev) 3781 { 3782 /* 0x5000-0x5FFF: human interface helpers */ 3783 *send_acpi_ev = true; 3784 *ignore_acpi_ev = false; 3785 3786 switch (hkey) { 3787 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3788 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3789 return true; 3790 3791 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3792 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3793 tpacpi_input_send_tabletsw(); 3794 hotkey_tablet_mode_notify_change(); 3795 *send_acpi_ev = false; 3796 return true; 3797 3798 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3799 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3800 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3801 /* do not propagate these events */ 3802 *ignore_acpi_ev = true; 3803 return true; 3804 3805 default: 3806 return false; 3807 } 3808 } 3809 3810 static void thermal_dump_all_sensors(void); 3811 3812 static bool hotkey_notify_6xxx(const u32 hkey, 3813 bool *send_acpi_ev, 3814 bool *ignore_acpi_ev) 3815 { 3816 bool known = true; 3817 3818 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 3819 *send_acpi_ev = true; 3820 *ignore_acpi_ev = false; 3821 3822 switch (hkey) { 3823 case TP_HKEY_EV_THM_TABLE_CHANGED: 3824 pr_info("EC reports that Thermal Table has changed\n"); 3825 /* recommended action: do nothing, we don't have 3826 * Lenovo ATM information */ 3827 return true; 3828 case TP_HKEY_EV_ALARM_BAT_HOT: 3829 pr_crit("THERMAL ALARM: battery is too hot!\n"); 3830 /* recommended action: warn user through gui */ 3831 break; 3832 case TP_HKEY_EV_ALARM_BAT_XHOT: 3833 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 3834 /* recommended action: immediate sleep/hibernate */ 3835 break; 3836 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3837 pr_crit("THERMAL ALARM: " 3838 "a sensor reports something is too hot!\n"); 3839 /* recommended action: warn user through gui, that */ 3840 /* some internal component is too hot */ 3841 break; 3842 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3843 pr_alert("THERMAL EMERGENCY: " 3844 "a sensor reports something is extremely hot!\n"); 3845 /* recommended action: immediate sleep/hibernate */ 3846 break; 3847 case TP_HKEY_EV_AC_CHANGED: 3848 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 3849 * AC status changed; can be triggered by plugging or 3850 * unplugging AC adapter, docking or undocking. */ 3851 3852 /* fallthrough */ 3853 3854 case TP_HKEY_EV_KEY_NUMLOCK: 3855 case TP_HKEY_EV_KEY_FN: 3856 case TP_HKEY_EV_KEY_FN_ESC: 3857 /* key press events, we just ignore them as long as the EC 3858 * is still reporting them in the normal keyboard stream */ 3859 *send_acpi_ev = false; 3860 *ignore_acpi_ev = true; 3861 return true; 3862 3863 default: 3864 pr_warn("unknown possible thermal alarm or keyboard event received\n"); 3865 known = false; 3866 } 3867 3868 thermal_dump_all_sensors(); 3869 3870 return known; 3871 } 3872 3873 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3874 { 3875 u32 hkey; 3876 bool send_acpi_ev; 3877 bool ignore_acpi_ev; 3878 bool known_ev; 3879 3880 if (event != 0x80) { 3881 pr_err("unknown HKEY notification event %d\n", event); 3882 /* forward it to userspace, maybe it knows how to handle it */ 3883 acpi_bus_generate_netlink_event( 3884 ibm->acpi->device->pnp.device_class, 3885 dev_name(&ibm->acpi->device->dev), 3886 event, 0); 3887 return; 3888 } 3889 3890 while (1) { 3891 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3892 pr_err("failed to retrieve HKEY event\n"); 3893 return; 3894 } 3895 3896 if (hkey == 0) { 3897 /* queue empty */ 3898 return; 3899 } 3900 3901 send_acpi_ev = true; 3902 ignore_acpi_ev = false; 3903 3904 switch (hkey >> 12) { 3905 case 1: 3906 /* 0x1000-0x1FFF: key presses */ 3907 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3908 &ignore_acpi_ev); 3909 break; 3910 case 2: 3911 /* 0x2000-0x2FFF: Wakeup reason */ 3912 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3913 &ignore_acpi_ev); 3914 break; 3915 case 3: 3916 /* 0x3000-0x3FFF: bay-related wakeups */ 3917 switch (hkey) { 3918 case TP_HKEY_EV_BAYEJ_ACK: 3919 hotkey_autosleep_ack = 1; 3920 pr_info("bay ejected\n"); 3921 hotkey_wakeup_hotunplug_complete_notify_change(); 3922 known_ev = true; 3923 break; 3924 case TP_HKEY_EV_OPTDRV_EJ: 3925 /* FIXME: kick libata if SATA link offline */ 3926 known_ev = true; 3927 break; 3928 default: 3929 known_ev = false; 3930 } 3931 break; 3932 case 4: 3933 /* 0x4000-0x4FFF: dock-related events */ 3934 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 3935 &ignore_acpi_ev); 3936 break; 3937 case 5: 3938 /* 0x5000-0x5FFF: human interface helpers */ 3939 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3940 &ignore_acpi_ev); 3941 break; 3942 case 6: 3943 /* 0x6000-0x6FFF: thermal alarms/notices and 3944 * keyboard events */ 3945 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 3946 &ignore_acpi_ev); 3947 break; 3948 case 7: 3949 /* 0x7000-0x7FFF: misc */ 3950 if (tp_features.hotkey_wlsw && 3951 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3952 tpacpi_send_radiosw_update(); 3953 send_acpi_ev = 0; 3954 known_ev = true; 3955 break; 3956 } 3957 /* fallthrough to default */ 3958 default: 3959 known_ev = false; 3960 } 3961 if (!known_ev) { 3962 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 3963 pr_notice("please report the conditions when this " 3964 "event happened to %s\n", TPACPI_MAIL); 3965 } 3966 3967 /* netlink events */ 3968 if (!ignore_acpi_ev && send_acpi_ev) { 3969 acpi_bus_generate_netlink_event( 3970 ibm->acpi->device->pnp.device_class, 3971 dev_name(&ibm->acpi->device->dev), 3972 event, hkey); 3973 } 3974 } 3975 } 3976 3977 static void hotkey_suspend(void) 3978 { 3979 /* Do these on suspend, we get the events on early resume! */ 3980 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 3981 hotkey_autosleep_ack = 0; 3982 3983 /* save previous mode of adaptive keyboard of X1 Carbon */ 3984 if (tp_features.has_adaptive_kbd) { 3985 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 3986 "GTRW", "dd", 0)) { 3987 pr_err("Cannot read adaptive keyboard mode.\n"); 3988 } 3989 } 3990 } 3991 3992 static void hotkey_resume(void) 3993 { 3994 tpacpi_disable_brightness_delay(); 3995 3996 if (hotkey_status_set(true) < 0 || 3997 hotkey_mask_set(hotkey_acpi_mask) < 0) 3998 pr_err("error while attempting to reset the event " 3999 "firmware interface\n"); 4000 4001 tpacpi_send_radiosw_update(); 4002 hotkey_tablet_mode_notify_change(); 4003 hotkey_wakeup_reason_notify_change(); 4004 hotkey_wakeup_hotunplug_complete_notify_change(); 4005 hotkey_poll_setup_safe(false); 4006 4007 /* restore previous mode of adapive keyboard of X1 Carbon */ 4008 if (tp_features.has_adaptive_kbd) { 4009 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4010 adaptive_keyboard_prev_mode)) { 4011 pr_err("Cannot set adaptive keyboard mode.\n"); 4012 } 4013 } 4014 } 4015 4016 /* procfs -------------------------------------------------------------- */ 4017 static int hotkey_read(struct seq_file *m) 4018 { 4019 int res, status; 4020 4021 if (!tp_features.hotkey) { 4022 seq_printf(m, "status:\t\tnot supported\n"); 4023 return 0; 4024 } 4025 4026 if (mutex_lock_killable(&hotkey_mutex)) 4027 return -ERESTARTSYS; 4028 res = hotkey_status_get(&status); 4029 if (!res) 4030 res = hotkey_mask_get(); 4031 mutex_unlock(&hotkey_mutex); 4032 if (res) 4033 return res; 4034 4035 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4036 if (hotkey_all_mask) { 4037 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4038 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4039 } else { 4040 seq_printf(m, "mask:\t\tnot supported\n"); 4041 seq_printf(m, "commands:\tenable, disable, reset\n"); 4042 } 4043 4044 return 0; 4045 } 4046 4047 static void hotkey_enabledisable_warn(bool enable) 4048 { 4049 tpacpi_log_usertask("procfs hotkey enable/disable"); 4050 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4051 pr_fmt("hotkey enable/disable functionality has been " 4052 "removed from the driver. " 4053 "Hotkeys are always enabled.\n"))) 4054 pr_err("Please remove the hotkey=enable module " 4055 "parameter, it is deprecated. " 4056 "Hotkeys are always enabled.\n"); 4057 } 4058 4059 static int hotkey_write(char *buf) 4060 { 4061 int res; 4062 u32 mask; 4063 char *cmd; 4064 4065 if (!tp_features.hotkey) 4066 return -ENODEV; 4067 4068 if (mutex_lock_killable(&hotkey_mutex)) 4069 return -ERESTARTSYS; 4070 4071 mask = hotkey_user_mask; 4072 4073 res = 0; 4074 while ((cmd = next_cmd(&buf))) { 4075 if (strlencmp(cmd, "enable") == 0) { 4076 hotkey_enabledisable_warn(1); 4077 } else if (strlencmp(cmd, "disable") == 0) { 4078 hotkey_enabledisable_warn(0); 4079 res = -EPERM; 4080 } else if (strlencmp(cmd, "reset") == 0) { 4081 mask = (hotkey_all_mask | hotkey_source_mask) 4082 & ~hotkey_reserved_mask; 4083 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4084 /* mask set */ 4085 } else if (sscanf(cmd, "%x", &mask) == 1) { 4086 /* mask set */ 4087 } else { 4088 res = -EINVAL; 4089 goto errexit; 4090 } 4091 } 4092 4093 if (!res) { 4094 tpacpi_disclose_usertask("procfs hotkey", 4095 "set mask to 0x%08x\n", mask); 4096 res = hotkey_user_mask_set(mask); 4097 } 4098 4099 errexit: 4100 mutex_unlock(&hotkey_mutex); 4101 return res; 4102 } 4103 4104 static const struct acpi_device_id ibm_htk_device_ids[] = { 4105 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4106 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4107 {"", 0}, 4108 }; 4109 4110 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4111 .hid = ibm_htk_device_ids, 4112 .notify = hotkey_notify, 4113 .handle = &hkey_handle, 4114 .type = ACPI_DEVICE_NOTIFY, 4115 }; 4116 4117 static struct ibm_struct hotkey_driver_data = { 4118 .name = "hotkey", 4119 .read = hotkey_read, 4120 .write = hotkey_write, 4121 .exit = hotkey_exit, 4122 .resume = hotkey_resume, 4123 .suspend = hotkey_suspend, 4124 .acpi = &ibm_hotkey_acpidriver, 4125 }; 4126 4127 /************************************************************************* 4128 * Bluetooth subdriver 4129 */ 4130 4131 enum { 4132 /* ACPI GBDC/SBDC bits */ 4133 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4134 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4135 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4136 0 = disable, 1 = enable */ 4137 }; 4138 4139 enum { 4140 /* ACPI \BLTH commands */ 4141 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4142 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4143 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4144 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4145 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4146 }; 4147 4148 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4149 4150 static int bluetooth_get_status(void) 4151 { 4152 int status; 4153 4154 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4155 if (dbg_bluetoothemul) 4156 return (tpacpi_bluetooth_emulstate) ? 4157 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4158 #endif 4159 4160 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4161 return -EIO; 4162 4163 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4164 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4165 } 4166 4167 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4168 { 4169 int status; 4170 4171 vdbg_printk(TPACPI_DBG_RFKILL, 4172 "will attempt to %s bluetooth\n", 4173 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4174 4175 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4176 if (dbg_bluetoothemul) { 4177 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4178 return 0; 4179 } 4180 #endif 4181 4182 if (state == TPACPI_RFK_RADIO_ON) 4183 status = TP_ACPI_BLUETOOTH_RADIOSSW 4184 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4185 else 4186 status = 0; 4187 4188 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4189 return -EIO; 4190 4191 return 0; 4192 } 4193 4194 /* sysfs bluetooth enable ---------------------------------------------- */ 4195 static ssize_t bluetooth_enable_show(struct device *dev, 4196 struct device_attribute *attr, 4197 char *buf) 4198 { 4199 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4200 attr, buf); 4201 } 4202 4203 static ssize_t bluetooth_enable_store(struct device *dev, 4204 struct device_attribute *attr, 4205 const char *buf, size_t count) 4206 { 4207 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4208 attr, buf, count); 4209 } 4210 4211 static DEVICE_ATTR_RW(bluetooth_enable); 4212 4213 /* --------------------------------------------------------------------- */ 4214 4215 static struct attribute *bluetooth_attributes[] = { 4216 &dev_attr_bluetooth_enable.attr, 4217 NULL 4218 }; 4219 4220 static const struct attribute_group bluetooth_attr_group = { 4221 .attrs = bluetooth_attributes, 4222 }; 4223 4224 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4225 .get_status = bluetooth_get_status, 4226 .set_status = bluetooth_set_status, 4227 }; 4228 4229 static void bluetooth_shutdown(void) 4230 { 4231 /* Order firmware to save current state to NVRAM */ 4232 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4233 TP_ACPI_BLTH_SAVE_STATE)) 4234 pr_notice("failed to save bluetooth state to NVRAM\n"); 4235 else 4236 vdbg_printk(TPACPI_DBG_RFKILL, 4237 "bluetooth state saved to NVRAM\n"); 4238 } 4239 4240 static void bluetooth_exit(void) 4241 { 4242 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4243 &bluetooth_attr_group); 4244 4245 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4246 4247 bluetooth_shutdown(); 4248 } 4249 4250 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4251 { 4252 int res; 4253 int status = 0; 4254 4255 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4256 "initializing bluetooth subdriver\n"); 4257 4258 TPACPI_ACPIHANDLE_INIT(hkey); 4259 4260 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4261 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4262 tp_features.bluetooth = hkey_handle && 4263 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4264 4265 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4266 "bluetooth is %s, status 0x%02x\n", 4267 str_supported(tp_features.bluetooth), 4268 status); 4269 4270 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4271 if (dbg_bluetoothemul) { 4272 tp_features.bluetooth = 1; 4273 pr_info("bluetooth switch emulation enabled\n"); 4274 } else 4275 #endif 4276 if (tp_features.bluetooth && 4277 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4278 /* no bluetooth hardware present in system */ 4279 tp_features.bluetooth = 0; 4280 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4281 "bluetooth hardware not installed\n"); 4282 } 4283 4284 if (!tp_features.bluetooth) 4285 return 1; 4286 4287 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4288 &bluetooth_tprfk_ops, 4289 RFKILL_TYPE_BLUETOOTH, 4290 TPACPI_RFK_BLUETOOTH_SW_NAME, 4291 true); 4292 if (res) 4293 return res; 4294 4295 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4296 &bluetooth_attr_group); 4297 if (res) { 4298 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4299 return res; 4300 } 4301 4302 return 0; 4303 } 4304 4305 /* procfs -------------------------------------------------------------- */ 4306 static int bluetooth_read(struct seq_file *m) 4307 { 4308 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4309 } 4310 4311 static int bluetooth_write(char *buf) 4312 { 4313 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4314 } 4315 4316 static struct ibm_struct bluetooth_driver_data = { 4317 .name = "bluetooth", 4318 .read = bluetooth_read, 4319 .write = bluetooth_write, 4320 .exit = bluetooth_exit, 4321 .shutdown = bluetooth_shutdown, 4322 }; 4323 4324 /************************************************************************* 4325 * Wan subdriver 4326 */ 4327 4328 enum { 4329 /* ACPI GWAN/SWAN bits */ 4330 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4331 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4332 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4333 0 = disable, 1 = enable */ 4334 }; 4335 4336 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4337 4338 static int wan_get_status(void) 4339 { 4340 int status; 4341 4342 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4343 if (dbg_wwanemul) 4344 return (tpacpi_wwan_emulstate) ? 4345 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4346 #endif 4347 4348 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4349 return -EIO; 4350 4351 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4352 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4353 } 4354 4355 static int wan_set_status(enum tpacpi_rfkill_state state) 4356 { 4357 int status; 4358 4359 vdbg_printk(TPACPI_DBG_RFKILL, 4360 "will attempt to %s wwan\n", 4361 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4362 4363 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4364 if (dbg_wwanemul) { 4365 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4366 return 0; 4367 } 4368 #endif 4369 4370 if (state == TPACPI_RFK_RADIO_ON) 4371 status = TP_ACPI_WANCARD_RADIOSSW 4372 | TP_ACPI_WANCARD_RESUMECTRL; 4373 else 4374 status = 0; 4375 4376 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4377 return -EIO; 4378 4379 return 0; 4380 } 4381 4382 /* sysfs wan enable ---------------------------------------------------- */ 4383 static ssize_t wan_enable_show(struct device *dev, 4384 struct device_attribute *attr, 4385 char *buf) 4386 { 4387 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4388 attr, buf); 4389 } 4390 4391 static ssize_t wan_enable_store(struct device *dev, 4392 struct device_attribute *attr, 4393 const char *buf, size_t count) 4394 { 4395 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4396 attr, buf, count); 4397 } 4398 4399 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4400 wan_enable_show, wan_enable_store); 4401 4402 /* --------------------------------------------------------------------- */ 4403 4404 static struct attribute *wan_attributes[] = { 4405 &dev_attr_wwan_enable.attr, 4406 NULL 4407 }; 4408 4409 static const struct attribute_group wan_attr_group = { 4410 .attrs = wan_attributes, 4411 }; 4412 4413 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4414 .get_status = wan_get_status, 4415 .set_status = wan_set_status, 4416 }; 4417 4418 static void wan_shutdown(void) 4419 { 4420 /* Order firmware to save current state to NVRAM */ 4421 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4422 TP_ACPI_WGSV_SAVE_STATE)) 4423 pr_notice("failed to save WWAN state to NVRAM\n"); 4424 else 4425 vdbg_printk(TPACPI_DBG_RFKILL, 4426 "WWAN state saved to NVRAM\n"); 4427 } 4428 4429 static void wan_exit(void) 4430 { 4431 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4432 &wan_attr_group); 4433 4434 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4435 4436 wan_shutdown(); 4437 } 4438 4439 static int __init wan_init(struct ibm_init_struct *iibm) 4440 { 4441 int res; 4442 int status = 0; 4443 4444 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4445 "initializing wan subdriver\n"); 4446 4447 TPACPI_ACPIHANDLE_INIT(hkey); 4448 4449 tp_features.wan = hkey_handle && 4450 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4451 4452 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4453 "wan is %s, status 0x%02x\n", 4454 str_supported(tp_features.wan), 4455 status); 4456 4457 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4458 if (dbg_wwanemul) { 4459 tp_features.wan = 1; 4460 pr_info("wwan switch emulation enabled\n"); 4461 } else 4462 #endif 4463 if (tp_features.wan && 4464 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4465 /* no wan hardware present in system */ 4466 tp_features.wan = 0; 4467 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4468 "wan hardware not installed\n"); 4469 } 4470 4471 if (!tp_features.wan) 4472 return 1; 4473 4474 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4475 &wan_tprfk_ops, 4476 RFKILL_TYPE_WWAN, 4477 TPACPI_RFK_WWAN_SW_NAME, 4478 true); 4479 if (res) 4480 return res; 4481 4482 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4483 &wan_attr_group); 4484 4485 if (res) { 4486 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4487 return res; 4488 } 4489 4490 return 0; 4491 } 4492 4493 /* procfs -------------------------------------------------------------- */ 4494 static int wan_read(struct seq_file *m) 4495 { 4496 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4497 } 4498 4499 static int wan_write(char *buf) 4500 { 4501 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4502 } 4503 4504 static struct ibm_struct wan_driver_data = { 4505 .name = "wan", 4506 .read = wan_read, 4507 .write = wan_write, 4508 .exit = wan_exit, 4509 .shutdown = wan_shutdown, 4510 }; 4511 4512 /************************************************************************* 4513 * UWB subdriver 4514 */ 4515 4516 enum { 4517 /* ACPI GUWB/SUWB bits */ 4518 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4519 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4520 }; 4521 4522 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4523 4524 static int uwb_get_status(void) 4525 { 4526 int status; 4527 4528 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4529 if (dbg_uwbemul) 4530 return (tpacpi_uwb_emulstate) ? 4531 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4532 #endif 4533 4534 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4535 return -EIO; 4536 4537 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4538 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4539 } 4540 4541 static int uwb_set_status(enum tpacpi_rfkill_state state) 4542 { 4543 int status; 4544 4545 vdbg_printk(TPACPI_DBG_RFKILL, 4546 "will attempt to %s UWB\n", 4547 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4548 4549 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4550 if (dbg_uwbemul) { 4551 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4552 return 0; 4553 } 4554 #endif 4555 4556 if (state == TPACPI_RFK_RADIO_ON) 4557 status = TP_ACPI_UWB_RADIOSSW; 4558 else 4559 status = 0; 4560 4561 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4562 return -EIO; 4563 4564 return 0; 4565 } 4566 4567 /* --------------------------------------------------------------------- */ 4568 4569 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4570 .get_status = uwb_get_status, 4571 .set_status = uwb_set_status, 4572 }; 4573 4574 static void uwb_exit(void) 4575 { 4576 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4577 } 4578 4579 static int __init uwb_init(struct ibm_init_struct *iibm) 4580 { 4581 int res; 4582 int status = 0; 4583 4584 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4585 "initializing uwb subdriver\n"); 4586 4587 TPACPI_ACPIHANDLE_INIT(hkey); 4588 4589 tp_features.uwb = hkey_handle && 4590 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4591 4592 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4593 "uwb is %s, status 0x%02x\n", 4594 str_supported(tp_features.uwb), 4595 status); 4596 4597 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4598 if (dbg_uwbemul) { 4599 tp_features.uwb = 1; 4600 pr_info("uwb switch emulation enabled\n"); 4601 } else 4602 #endif 4603 if (tp_features.uwb && 4604 !(status & TP_ACPI_UWB_HWPRESENT)) { 4605 /* no uwb hardware present in system */ 4606 tp_features.uwb = 0; 4607 dbg_printk(TPACPI_DBG_INIT, 4608 "uwb hardware not installed\n"); 4609 } 4610 4611 if (!tp_features.uwb) 4612 return 1; 4613 4614 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4615 &uwb_tprfk_ops, 4616 RFKILL_TYPE_UWB, 4617 TPACPI_RFK_UWB_SW_NAME, 4618 false); 4619 return res; 4620 } 4621 4622 static struct ibm_struct uwb_driver_data = { 4623 .name = "uwb", 4624 .exit = uwb_exit, 4625 .flags.experimental = 1, 4626 }; 4627 4628 /************************************************************************* 4629 * Video subdriver 4630 */ 4631 4632 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4633 4634 enum video_access_mode { 4635 TPACPI_VIDEO_NONE = 0, 4636 TPACPI_VIDEO_570, /* 570 */ 4637 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4638 TPACPI_VIDEO_NEW, /* all others */ 4639 }; 4640 4641 enum { /* video status flags, based on VIDEO_570 */ 4642 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4643 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4644 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4645 }; 4646 4647 enum { /* TPACPI_VIDEO_570 constants */ 4648 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4649 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4650 * video_status_flags */ 4651 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4652 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4653 }; 4654 4655 static enum video_access_mode video_supported; 4656 static int video_orig_autosw; 4657 4658 static int video_autosw_get(void); 4659 static int video_autosw_set(int enable); 4660 4661 TPACPI_HANDLE(vid, root, 4662 "\\_SB.PCI.AGP.VGA", /* 570 */ 4663 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4664 "\\_SB.PCI0.VID0", /* 770e */ 4665 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4666 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4667 "\\_SB.PCI0.AGP.VID", /* all others */ 4668 ); /* R30, R31 */ 4669 4670 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4671 4672 static int __init video_init(struct ibm_init_struct *iibm) 4673 { 4674 int ivga; 4675 4676 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4677 4678 TPACPI_ACPIHANDLE_INIT(vid); 4679 if (tpacpi_is_ibm()) 4680 TPACPI_ACPIHANDLE_INIT(vid2); 4681 4682 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4683 /* G41, assume IVGA doesn't change */ 4684 vid_handle = vid2_handle; 4685 4686 if (!vid_handle) 4687 /* video switching not supported on R30, R31 */ 4688 video_supported = TPACPI_VIDEO_NONE; 4689 else if (tpacpi_is_ibm() && 4690 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4691 /* 570 */ 4692 video_supported = TPACPI_VIDEO_570; 4693 else if (tpacpi_is_ibm() && 4694 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4695 /* 600e/x, 770e, 770x */ 4696 video_supported = TPACPI_VIDEO_770; 4697 else 4698 /* all others */ 4699 video_supported = TPACPI_VIDEO_NEW; 4700 4701 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4702 str_supported(video_supported != TPACPI_VIDEO_NONE), 4703 video_supported); 4704 4705 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 4706 } 4707 4708 static void video_exit(void) 4709 { 4710 dbg_printk(TPACPI_DBG_EXIT, 4711 "restoring original video autoswitch mode\n"); 4712 if (video_autosw_set(video_orig_autosw)) 4713 pr_err("error while trying to restore original " 4714 "video autoswitch mode\n"); 4715 } 4716 4717 static int video_outputsw_get(void) 4718 { 4719 int status = 0; 4720 int i; 4721 4722 switch (video_supported) { 4723 case TPACPI_VIDEO_570: 4724 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4725 TP_ACPI_VIDEO_570_PHSCMD)) 4726 return -EIO; 4727 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4728 break; 4729 case TPACPI_VIDEO_770: 4730 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4731 return -EIO; 4732 if (i) 4733 status |= TP_ACPI_VIDEO_S_LCD; 4734 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4735 return -EIO; 4736 if (i) 4737 status |= TP_ACPI_VIDEO_S_CRT; 4738 break; 4739 case TPACPI_VIDEO_NEW: 4740 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4741 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4742 return -EIO; 4743 if (i) 4744 status |= TP_ACPI_VIDEO_S_CRT; 4745 4746 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4747 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4748 return -EIO; 4749 if (i) 4750 status |= TP_ACPI_VIDEO_S_LCD; 4751 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4752 return -EIO; 4753 if (i) 4754 status |= TP_ACPI_VIDEO_S_DVI; 4755 break; 4756 default: 4757 return -ENOSYS; 4758 } 4759 4760 return status; 4761 } 4762 4763 static int video_outputsw_set(int status) 4764 { 4765 int autosw; 4766 int res = 0; 4767 4768 switch (video_supported) { 4769 case TPACPI_VIDEO_570: 4770 res = acpi_evalf(NULL, NULL, 4771 "\\_SB.PHS2", "vdd", 4772 TP_ACPI_VIDEO_570_PHS2CMD, 4773 status | TP_ACPI_VIDEO_570_PHS2SET); 4774 break; 4775 case TPACPI_VIDEO_770: 4776 autosw = video_autosw_get(); 4777 if (autosw < 0) 4778 return autosw; 4779 4780 res = video_autosw_set(1); 4781 if (res) 4782 return res; 4783 res = acpi_evalf(vid_handle, NULL, 4784 "ASWT", "vdd", status * 0x100, 0); 4785 if (!autosw && video_autosw_set(autosw)) { 4786 pr_err("video auto-switch left enabled due to error\n"); 4787 return -EIO; 4788 } 4789 break; 4790 case TPACPI_VIDEO_NEW: 4791 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4792 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4793 break; 4794 default: 4795 return -ENOSYS; 4796 } 4797 4798 return (res) ? 0 : -EIO; 4799 } 4800 4801 static int video_autosw_get(void) 4802 { 4803 int autosw = 0; 4804 4805 switch (video_supported) { 4806 case TPACPI_VIDEO_570: 4807 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4808 return -EIO; 4809 break; 4810 case TPACPI_VIDEO_770: 4811 case TPACPI_VIDEO_NEW: 4812 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4813 return -EIO; 4814 break; 4815 default: 4816 return -ENOSYS; 4817 } 4818 4819 return autosw & 1; 4820 } 4821 4822 static int video_autosw_set(int enable) 4823 { 4824 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 4825 return -EIO; 4826 return 0; 4827 } 4828 4829 static int video_outputsw_cycle(void) 4830 { 4831 int autosw = video_autosw_get(); 4832 int res; 4833 4834 if (autosw < 0) 4835 return autosw; 4836 4837 switch (video_supported) { 4838 case TPACPI_VIDEO_570: 4839 res = video_autosw_set(1); 4840 if (res) 4841 return res; 4842 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4843 break; 4844 case TPACPI_VIDEO_770: 4845 case TPACPI_VIDEO_NEW: 4846 res = video_autosw_set(1); 4847 if (res) 4848 return res; 4849 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4850 break; 4851 default: 4852 return -ENOSYS; 4853 } 4854 if (!autosw && video_autosw_set(autosw)) { 4855 pr_err("video auto-switch left enabled due to error\n"); 4856 return -EIO; 4857 } 4858 4859 return (res) ? 0 : -EIO; 4860 } 4861 4862 static int video_expand_toggle(void) 4863 { 4864 switch (video_supported) { 4865 case TPACPI_VIDEO_570: 4866 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 4867 0 : -EIO; 4868 case TPACPI_VIDEO_770: 4869 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 4870 0 : -EIO; 4871 case TPACPI_VIDEO_NEW: 4872 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 4873 0 : -EIO; 4874 default: 4875 return -ENOSYS; 4876 } 4877 /* not reached */ 4878 } 4879 4880 static int video_read(struct seq_file *m) 4881 { 4882 int status, autosw; 4883 4884 if (video_supported == TPACPI_VIDEO_NONE) { 4885 seq_printf(m, "status:\t\tnot supported\n"); 4886 return 0; 4887 } 4888 4889 /* Even reads can crash X.org, so... */ 4890 if (!capable(CAP_SYS_ADMIN)) 4891 return -EPERM; 4892 4893 status = video_outputsw_get(); 4894 if (status < 0) 4895 return status; 4896 4897 autosw = video_autosw_get(); 4898 if (autosw < 0) 4899 return autosw; 4900 4901 seq_printf(m, "status:\t\tsupported\n"); 4902 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4903 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4904 if (video_supported == TPACPI_VIDEO_NEW) 4905 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 4906 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 4907 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 4908 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 4909 if (video_supported == TPACPI_VIDEO_NEW) 4910 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 4911 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 4912 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 4913 4914 return 0; 4915 } 4916 4917 static int video_write(char *buf) 4918 { 4919 char *cmd; 4920 int enable, disable, status; 4921 int res; 4922 4923 if (video_supported == TPACPI_VIDEO_NONE) 4924 return -ENODEV; 4925 4926 /* Even reads can crash X.org, let alone writes... */ 4927 if (!capable(CAP_SYS_ADMIN)) 4928 return -EPERM; 4929 4930 enable = 0; 4931 disable = 0; 4932 4933 while ((cmd = next_cmd(&buf))) { 4934 if (strlencmp(cmd, "lcd_enable") == 0) { 4935 enable |= TP_ACPI_VIDEO_S_LCD; 4936 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4937 disable |= TP_ACPI_VIDEO_S_LCD; 4938 } else if (strlencmp(cmd, "crt_enable") == 0) { 4939 enable |= TP_ACPI_VIDEO_S_CRT; 4940 } else if (strlencmp(cmd, "crt_disable") == 0) { 4941 disable |= TP_ACPI_VIDEO_S_CRT; 4942 } else if (video_supported == TPACPI_VIDEO_NEW && 4943 strlencmp(cmd, "dvi_enable") == 0) { 4944 enable |= TP_ACPI_VIDEO_S_DVI; 4945 } else if (video_supported == TPACPI_VIDEO_NEW && 4946 strlencmp(cmd, "dvi_disable") == 0) { 4947 disable |= TP_ACPI_VIDEO_S_DVI; 4948 } else if (strlencmp(cmd, "auto_enable") == 0) { 4949 res = video_autosw_set(1); 4950 if (res) 4951 return res; 4952 } else if (strlencmp(cmd, "auto_disable") == 0) { 4953 res = video_autosw_set(0); 4954 if (res) 4955 return res; 4956 } else if (strlencmp(cmd, "video_switch") == 0) { 4957 res = video_outputsw_cycle(); 4958 if (res) 4959 return res; 4960 } else if (strlencmp(cmd, "expand_toggle") == 0) { 4961 res = video_expand_toggle(); 4962 if (res) 4963 return res; 4964 } else 4965 return -EINVAL; 4966 } 4967 4968 if (enable || disable) { 4969 status = video_outputsw_get(); 4970 if (status < 0) 4971 return status; 4972 res = video_outputsw_set((status & ~disable) | enable); 4973 if (res) 4974 return res; 4975 } 4976 4977 return 0; 4978 } 4979 4980 static struct ibm_struct video_driver_data = { 4981 .name = "video", 4982 .read = video_read, 4983 .write = video_write, 4984 .exit = video_exit, 4985 }; 4986 4987 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 4988 4989 /************************************************************************* 4990 * Keyboard backlight subdriver 4991 */ 4992 4993 static int kbdlight_set_level(int level) 4994 { 4995 if (!hkey_handle) 4996 return -ENXIO; 4997 4998 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 4999 return -EIO; 5000 5001 return 0; 5002 } 5003 5004 static int kbdlight_set_level_and_update(int level); 5005 5006 static int kbdlight_get_level(void) 5007 { 5008 int status = 0; 5009 5010 if (!hkey_handle) 5011 return -ENXIO; 5012 5013 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5014 return -EIO; 5015 5016 if (status < 0) 5017 return status; 5018 5019 return status & 0x3; 5020 } 5021 5022 static bool kbdlight_is_supported(void) 5023 { 5024 int status = 0; 5025 5026 if (!hkey_handle) 5027 return false; 5028 5029 if (!acpi_has_method(hkey_handle, "MLCG")) { 5030 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5031 return false; 5032 } 5033 5034 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5035 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5036 return false; 5037 } 5038 5039 if (status < 0) { 5040 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5041 return false; 5042 } 5043 5044 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5045 /* 5046 * Guessed test for keyboard backlight: 5047 * 5048 * Machines with backlight keyboard return: 5049 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5050 * b110100010010000000XX - ThinkPad x230 5051 * b010100000010000000XX - ThinkPad x240 5052 * b010100000010000000XX - ThinkPad W541 5053 * (XX is current backlight level) 5054 * 5055 * Machines without backlight keyboard return: 5056 * b10100001000000000000 - ThinkPad x230 5057 * b10110001000000000000 - ThinkPad E430 5058 * b00000000000000000000 - ThinkPad E450 5059 * 5060 * Candidate BITs for detection test (XOR): 5061 * b01000000001000000000 5062 * ^ 5063 */ 5064 return status & BIT(9); 5065 } 5066 5067 static void kbdlight_set_worker(struct work_struct *work) 5068 { 5069 struct tpacpi_led_classdev *data = 5070 container_of(work, struct tpacpi_led_classdev, work); 5071 5072 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5073 kbdlight_set_level_and_update(data->new_state); 5074 } 5075 5076 static void kbdlight_sysfs_set(struct led_classdev *led_cdev, 5077 enum led_brightness brightness) 5078 { 5079 struct tpacpi_led_classdev *data = 5080 container_of(led_cdev, 5081 struct tpacpi_led_classdev, 5082 led_classdev); 5083 data->new_state = brightness; 5084 queue_work(tpacpi_wq, &data->work); 5085 } 5086 5087 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5088 { 5089 int level; 5090 5091 level = kbdlight_get_level(); 5092 if (level < 0) 5093 return 0; 5094 5095 return level; 5096 } 5097 5098 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5099 .led_classdev = { 5100 .name = "tpacpi::kbd_backlight", 5101 .max_brightness = 2, 5102 .brightness_set = &kbdlight_sysfs_set, 5103 .brightness_get = &kbdlight_sysfs_get, 5104 } 5105 }; 5106 5107 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5108 { 5109 int rc; 5110 5111 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5112 5113 TPACPI_ACPIHANDLE_INIT(hkey); 5114 INIT_WORK(&tpacpi_led_kbdlight.work, kbdlight_set_worker); 5115 5116 if (!kbdlight_is_supported()) { 5117 tp_features.kbdlight = 0; 5118 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5119 return 1; 5120 } 5121 5122 tp_features.kbdlight = 1; 5123 5124 rc = led_classdev_register(&tpacpi_pdev->dev, 5125 &tpacpi_led_kbdlight.led_classdev); 5126 if (rc < 0) { 5127 tp_features.kbdlight = 0; 5128 return rc; 5129 } 5130 5131 return 0; 5132 } 5133 5134 static void kbdlight_exit(void) 5135 { 5136 if (tp_features.kbdlight) 5137 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5138 flush_workqueue(tpacpi_wq); 5139 } 5140 5141 static int kbdlight_set_level_and_update(int level) 5142 { 5143 int ret; 5144 struct led_classdev *led_cdev; 5145 5146 ret = kbdlight_set_level(level); 5147 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5148 5149 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5150 led_cdev->brightness = level; 5151 5152 return ret; 5153 } 5154 5155 static int kbdlight_read(struct seq_file *m) 5156 { 5157 int level; 5158 5159 if (!tp_features.kbdlight) { 5160 seq_printf(m, "status:\t\tnot supported\n"); 5161 } else { 5162 level = kbdlight_get_level(); 5163 if (level < 0) 5164 seq_printf(m, "status:\t\terror %d\n", level); 5165 else 5166 seq_printf(m, "status:\t\t%d\n", level); 5167 seq_printf(m, "commands:\t0, 1, 2\n"); 5168 } 5169 5170 return 0; 5171 } 5172 5173 static int kbdlight_write(char *buf) 5174 { 5175 char *cmd; 5176 int level = -1; 5177 5178 if (!tp_features.kbdlight) 5179 return -ENODEV; 5180 5181 while ((cmd = next_cmd(&buf))) { 5182 if (strlencmp(cmd, "0") == 0) 5183 level = 0; 5184 else if (strlencmp(cmd, "1") == 0) 5185 level = 1; 5186 else if (strlencmp(cmd, "2") == 0) 5187 level = 2; 5188 else 5189 return -EINVAL; 5190 } 5191 5192 if (level == -1) 5193 return -EINVAL; 5194 5195 return kbdlight_set_level_and_update(level); 5196 } 5197 5198 static void kbdlight_suspend(void) 5199 { 5200 struct led_classdev *led_cdev; 5201 5202 if (!tp_features.kbdlight) 5203 return; 5204 5205 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5206 led_update_brightness(led_cdev); 5207 led_classdev_suspend(led_cdev); 5208 } 5209 5210 static void kbdlight_resume(void) 5211 { 5212 if (!tp_features.kbdlight) 5213 return; 5214 5215 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5216 } 5217 5218 static struct ibm_struct kbdlight_driver_data = { 5219 .name = "kbdlight", 5220 .read = kbdlight_read, 5221 .write = kbdlight_write, 5222 .suspend = kbdlight_suspend, 5223 .resume = kbdlight_resume, 5224 .exit = kbdlight_exit, 5225 }; 5226 5227 /************************************************************************* 5228 * Light (thinklight) subdriver 5229 */ 5230 5231 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5232 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5233 5234 static int light_get_status(void) 5235 { 5236 int status = 0; 5237 5238 if (tp_features.light_status) { 5239 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5240 return -EIO; 5241 return (!!status); 5242 } 5243 5244 return -ENXIO; 5245 } 5246 5247 static int light_set_status(int status) 5248 { 5249 int rc; 5250 5251 if (tp_features.light) { 5252 if (cmos_handle) { 5253 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5254 (status) ? 5255 TP_CMOS_THINKLIGHT_ON : 5256 TP_CMOS_THINKLIGHT_OFF); 5257 } else { 5258 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5259 (status) ? 1 : 0); 5260 } 5261 return (rc) ? 0 : -EIO; 5262 } 5263 5264 return -ENXIO; 5265 } 5266 5267 static void light_set_status_worker(struct work_struct *work) 5268 { 5269 struct tpacpi_led_classdev *data = 5270 container_of(work, struct tpacpi_led_classdev, work); 5271 5272 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5273 light_set_status((data->new_state != TPACPI_LED_OFF)); 5274 } 5275 5276 static void light_sysfs_set(struct led_classdev *led_cdev, 5277 enum led_brightness brightness) 5278 { 5279 struct tpacpi_led_classdev *data = 5280 container_of(led_cdev, 5281 struct tpacpi_led_classdev, 5282 led_classdev); 5283 data->new_state = (brightness != LED_OFF) ? 5284 TPACPI_LED_ON : TPACPI_LED_OFF; 5285 queue_work(tpacpi_wq, &data->work); 5286 } 5287 5288 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5289 { 5290 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5291 } 5292 5293 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5294 .led_classdev = { 5295 .name = "tpacpi::thinklight", 5296 .brightness_set = &light_sysfs_set, 5297 .brightness_get = &light_sysfs_get, 5298 } 5299 }; 5300 5301 static int __init light_init(struct ibm_init_struct *iibm) 5302 { 5303 int rc; 5304 5305 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5306 5307 if (tpacpi_is_ibm()) { 5308 TPACPI_ACPIHANDLE_INIT(ledb); 5309 TPACPI_ACPIHANDLE_INIT(lght); 5310 } 5311 TPACPI_ACPIHANDLE_INIT(cmos); 5312 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 5313 5314 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5315 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5316 5317 if (tp_features.light) 5318 /* light status not supported on 5319 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5320 tp_features.light_status = 5321 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5322 5323 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5324 str_supported(tp_features.light), 5325 str_supported(tp_features.light_status)); 5326 5327 if (!tp_features.light) 5328 return 1; 5329 5330 rc = led_classdev_register(&tpacpi_pdev->dev, 5331 &tpacpi_led_thinklight.led_classdev); 5332 5333 if (rc < 0) { 5334 tp_features.light = 0; 5335 tp_features.light_status = 0; 5336 } else { 5337 rc = 0; 5338 } 5339 5340 return rc; 5341 } 5342 5343 static void light_exit(void) 5344 { 5345 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5346 flush_workqueue(tpacpi_wq); 5347 } 5348 5349 static int light_read(struct seq_file *m) 5350 { 5351 int status; 5352 5353 if (!tp_features.light) { 5354 seq_printf(m, "status:\t\tnot supported\n"); 5355 } else if (!tp_features.light_status) { 5356 seq_printf(m, "status:\t\tunknown\n"); 5357 seq_printf(m, "commands:\ton, off\n"); 5358 } else { 5359 status = light_get_status(); 5360 if (status < 0) 5361 return status; 5362 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5363 seq_printf(m, "commands:\ton, off\n"); 5364 } 5365 5366 return 0; 5367 } 5368 5369 static int light_write(char *buf) 5370 { 5371 char *cmd; 5372 int newstatus = 0; 5373 5374 if (!tp_features.light) 5375 return -ENODEV; 5376 5377 while ((cmd = next_cmd(&buf))) { 5378 if (strlencmp(cmd, "on") == 0) { 5379 newstatus = 1; 5380 } else if (strlencmp(cmd, "off") == 0) { 5381 newstatus = 0; 5382 } else 5383 return -EINVAL; 5384 } 5385 5386 return light_set_status(newstatus); 5387 } 5388 5389 static struct ibm_struct light_driver_data = { 5390 .name = "light", 5391 .read = light_read, 5392 .write = light_write, 5393 .exit = light_exit, 5394 }; 5395 5396 /************************************************************************* 5397 * CMOS subdriver 5398 */ 5399 5400 /* sysfs cmos_command -------------------------------------------------- */ 5401 static ssize_t cmos_command_store(struct device *dev, 5402 struct device_attribute *attr, 5403 const char *buf, size_t count) 5404 { 5405 unsigned long cmos_cmd; 5406 int res; 5407 5408 if (parse_strtoul(buf, 21, &cmos_cmd)) 5409 return -EINVAL; 5410 5411 res = issue_thinkpad_cmos_command(cmos_cmd); 5412 return (res) ? res : count; 5413 } 5414 5415 static DEVICE_ATTR_WO(cmos_command); 5416 5417 /* --------------------------------------------------------------------- */ 5418 5419 static int __init cmos_init(struct ibm_init_struct *iibm) 5420 { 5421 int res; 5422 5423 vdbg_printk(TPACPI_DBG_INIT, 5424 "initializing cmos commands subdriver\n"); 5425 5426 TPACPI_ACPIHANDLE_INIT(cmos); 5427 5428 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5429 str_supported(cmos_handle != NULL)); 5430 5431 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5432 if (res) 5433 return res; 5434 5435 return (cmos_handle) ? 0 : 1; 5436 } 5437 5438 static void cmos_exit(void) 5439 { 5440 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5441 } 5442 5443 static int cmos_read(struct seq_file *m) 5444 { 5445 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5446 R30, R31, T20-22, X20-21 */ 5447 if (!cmos_handle) 5448 seq_printf(m, "status:\t\tnot supported\n"); 5449 else { 5450 seq_printf(m, "status:\t\tsupported\n"); 5451 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5452 } 5453 5454 return 0; 5455 } 5456 5457 static int cmos_write(char *buf) 5458 { 5459 char *cmd; 5460 int cmos_cmd, res; 5461 5462 while ((cmd = next_cmd(&buf))) { 5463 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5464 cmos_cmd >= 0 && cmos_cmd <= 21) { 5465 /* cmos_cmd set */ 5466 } else 5467 return -EINVAL; 5468 5469 res = issue_thinkpad_cmos_command(cmos_cmd); 5470 if (res) 5471 return res; 5472 } 5473 5474 return 0; 5475 } 5476 5477 static struct ibm_struct cmos_driver_data = { 5478 .name = "cmos", 5479 .read = cmos_read, 5480 .write = cmos_write, 5481 .exit = cmos_exit, 5482 }; 5483 5484 /************************************************************************* 5485 * LED subdriver 5486 */ 5487 5488 enum led_access_mode { 5489 TPACPI_LED_NONE = 0, 5490 TPACPI_LED_570, /* 570 */ 5491 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5492 TPACPI_LED_NEW, /* all others */ 5493 }; 5494 5495 enum { /* For TPACPI_LED_OLD */ 5496 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5497 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5498 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5499 }; 5500 5501 static enum led_access_mode led_supported; 5502 5503 static acpi_handle led_handle; 5504 5505 #define TPACPI_LED_NUMLEDS 16 5506 static struct tpacpi_led_classdev *tpacpi_leds; 5507 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5508 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5509 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5510 "tpacpi::power", 5511 "tpacpi:orange:batt", 5512 "tpacpi:green:batt", 5513 "tpacpi::dock_active", 5514 "tpacpi::bay_active", 5515 "tpacpi::dock_batt", 5516 "tpacpi::unknown_led", 5517 "tpacpi::standby", 5518 "tpacpi::dock_status1", 5519 "tpacpi::dock_status2", 5520 "tpacpi::unknown_led2", 5521 "tpacpi::unknown_led3", 5522 "tpacpi::thinkvantage", 5523 }; 5524 #define TPACPI_SAFE_LEDS 0x1081U 5525 5526 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5527 { 5528 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5529 return false; 5530 #else 5531 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5532 #endif 5533 } 5534 5535 static int led_get_status(const unsigned int led) 5536 { 5537 int status; 5538 enum led_status_t led_s; 5539 5540 switch (led_supported) { 5541 case TPACPI_LED_570: 5542 if (!acpi_evalf(ec_handle, 5543 &status, "GLED", "dd", 1 << led)) 5544 return -EIO; 5545 led_s = (status == 0) ? 5546 TPACPI_LED_OFF : 5547 ((status == 1) ? 5548 TPACPI_LED_ON : 5549 TPACPI_LED_BLINK); 5550 tpacpi_led_state_cache[led] = led_s; 5551 return led_s; 5552 default: 5553 return -ENXIO; 5554 } 5555 5556 /* not reached */ 5557 } 5558 5559 static int led_set_status(const unsigned int led, 5560 const enum led_status_t ledstatus) 5561 { 5562 /* off, on, blink. Index is led_status_t */ 5563 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5564 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5565 5566 int rc = 0; 5567 5568 switch (led_supported) { 5569 case TPACPI_LED_570: 5570 /* 570 */ 5571 if (unlikely(led > 7)) 5572 return -EINVAL; 5573 if (unlikely(tpacpi_is_led_restricted(led))) 5574 return -EPERM; 5575 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5576 (1 << led), led_sled_arg1[ledstatus])) 5577 rc = -EIO; 5578 break; 5579 case TPACPI_LED_OLD: 5580 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5581 if (unlikely(led > 7)) 5582 return -EINVAL; 5583 if (unlikely(tpacpi_is_led_restricted(led))) 5584 return -EPERM; 5585 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5586 if (rc >= 0) 5587 rc = ec_write(TPACPI_LED_EC_HLBL, 5588 (ledstatus == TPACPI_LED_BLINK) << led); 5589 if (rc >= 0) 5590 rc = ec_write(TPACPI_LED_EC_HLCL, 5591 (ledstatus != TPACPI_LED_OFF) << led); 5592 break; 5593 case TPACPI_LED_NEW: 5594 /* all others */ 5595 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5596 return -EINVAL; 5597 if (unlikely(tpacpi_is_led_restricted(led))) 5598 return -EPERM; 5599 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5600 led, led_led_arg1[ledstatus])) 5601 rc = -EIO; 5602 break; 5603 default: 5604 rc = -ENXIO; 5605 } 5606 5607 if (!rc) 5608 tpacpi_led_state_cache[led] = ledstatus; 5609 5610 return rc; 5611 } 5612 5613 static void led_set_status_worker(struct work_struct *work) 5614 { 5615 struct tpacpi_led_classdev *data = 5616 container_of(work, struct tpacpi_led_classdev, work); 5617 5618 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5619 led_set_status(data->led, data->new_state); 5620 } 5621 5622 static void led_sysfs_set(struct led_classdev *led_cdev, 5623 enum led_brightness brightness) 5624 { 5625 struct tpacpi_led_classdev *data = container_of(led_cdev, 5626 struct tpacpi_led_classdev, led_classdev); 5627 5628 if (brightness == LED_OFF) 5629 data->new_state = TPACPI_LED_OFF; 5630 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5631 data->new_state = TPACPI_LED_ON; 5632 else 5633 data->new_state = TPACPI_LED_BLINK; 5634 5635 queue_work(tpacpi_wq, &data->work); 5636 } 5637 5638 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5639 unsigned long *delay_on, unsigned long *delay_off) 5640 { 5641 struct tpacpi_led_classdev *data = container_of(led_cdev, 5642 struct tpacpi_led_classdev, led_classdev); 5643 5644 /* Can we choose the flash rate? */ 5645 if (*delay_on == 0 && *delay_off == 0) { 5646 /* yes. set them to the hardware blink rate (1 Hz) */ 5647 *delay_on = 500; /* ms */ 5648 *delay_off = 500; /* ms */ 5649 } else if ((*delay_on != 500) || (*delay_off != 500)) 5650 return -EINVAL; 5651 5652 data->new_state = TPACPI_LED_BLINK; 5653 queue_work(tpacpi_wq, &data->work); 5654 5655 return 0; 5656 } 5657 5658 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5659 { 5660 int rc; 5661 5662 struct tpacpi_led_classdev *data = container_of(led_cdev, 5663 struct tpacpi_led_classdev, led_classdev); 5664 5665 rc = led_get_status(data->led); 5666 5667 if (rc == TPACPI_LED_OFF || rc < 0) 5668 rc = LED_OFF; /* no error handling in led class :( */ 5669 else 5670 rc = LED_FULL; 5671 5672 return rc; 5673 } 5674 5675 static void led_exit(void) 5676 { 5677 unsigned int i; 5678 5679 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5680 if (tpacpi_leds[i].led_classdev.name) 5681 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5682 } 5683 5684 flush_workqueue(tpacpi_wq); 5685 kfree(tpacpi_leds); 5686 } 5687 5688 static int __init tpacpi_init_led(unsigned int led) 5689 { 5690 int rc; 5691 5692 tpacpi_leds[led].led = led; 5693 5694 /* LEDs with no name don't get registered */ 5695 if (!tpacpi_led_names[led]) 5696 return 0; 5697 5698 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5699 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5700 if (led_supported == TPACPI_LED_570) 5701 tpacpi_leds[led].led_classdev.brightness_get = 5702 &led_sysfs_get; 5703 5704 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5705 5706 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5707 5708 rc = led_classdev_register(&tpacpi_pdev->dev, 5709 &tpacpi_leds[led].led_classdev); 5710 if (rc < 0) 5711 tpacpi_leds[led].led_classdev.name = NULL; 5712 5713 return rc; 5714 } 5715 5716 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5717 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5718 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5719 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5720 5721 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5722 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5723 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5724 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5725 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5726 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5727 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5728 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5729 5730 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5731 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5732 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5733 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5734 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5735 5736 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5737 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5738 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5739 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5740 5741 /* (1) - may have excess leds enabled on MSB */ 5742 5743 /* Defaults (order matters, keep last, don't reorder!) */ 5744 { /* Lenovo */ 5745 .vendor = PCI_VENDOR_ID_LENOVO, 5746 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5747 .quirks = 0x1fffU, 5748 }, 5749 { /* IBM ThinkPads with no EC version string */ 5750 .vendor = PCI_VENDOR_ID_IBM, 5751 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5752 .quirks = 0x00ffU, 5753 }, 5754 { /* IBM ThinkPads with EC version string */ 5755 .vendor = PCI_VENDOR_ID_IBM, 5756 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5757 .quirks = 0x00bfU, 5758 }, 5759 }; 5760 5761 #undef TPACPI_LEDQ_IBM 5762 #undef TPACPI_LEDQ_LNV 5763 5764 static enum led_access_mode __init led_init_detect_mode(void) 5765 { 5766 acpi_status status; 5767 5768 if (tpacpi_is_ibm()) { 5769 /* 570 */ 5770 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5771 if (ACPI_SUCCESS(status)) 5772 return TPACPI_LED_570; 5773 5774 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5775 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5776 if (ACPI_SUCCESS(status)) 5777 return TPACPI_LED_OLD; 5778 } 5779 5780 /* most others */ 5781 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5782 if (ACPI_SUCCESS(status)) 5783 return TPACPI_LED_NEW; 5784 5785 /* R30, R31, and unknown firmwares */ 5786 led_handle = NULL; 5787 return TPACPI_LED_NONE; 5788 } 5789 5790 static int __init led_init(struct ibm_init_struct *iibm) 5791 { 5792 unsigned int i; 5793 int rc; 5794 unsigned long useful_leds; 5795 5796 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5797 5798 led_supported = led_init_detect_mode(); 5799 5800 if (led_supported != TPACPI_LED_NONE) { 5801 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5802 ARRAY_SIZE(led_useful_qtable)); 5803 5804 if (!useful_leds) { 5805 led_handle = NULL; 5806 led_supported = TPACPI_LED_NONE; 5807 } 5808 } 5809 5810 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5811 str_supported(led_supported), led_supported); 5812 5813 if (led_supported == TPACPI_LED_NONE) 5814 return 1; 5815 5816 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5817 GFP_KERNEL); 5818 if (!tpacpi_leds) { 5819 pr_err("Out of memory for LED data\n"); 5820 return -ENOMEM; 5821 } 5822 5823 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5824 tpacpi_leds[i].led = -1; 5825 5826 if (!tpacpi_is_led_restricted(i) && 5827 test_bit(i, &useful_leds)) { 5828 rc = tpacpi_init_led(i); 5829 if (rc < 0) { 5830 led_exit(); 5831 return rc; 5832 } 5833 } 5834 } 5835 5836 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5837 pr_notice("warning: userspace override of important " 5838 "firmware LEDs is enabled\n"); 5839 #endif 5840 return 0; 5841 } 5842 5843 #define str_led_status(s) \ 5844 ((s) == TPACPI_LED_OFF ? "off" : \ 5845 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5846 5847 static int led_read(struct seq_file *m) 5848 { 5849 if (!led_supported) { 5850 seq_printf(m, "status:\t\tnot supported\n"); 5851 return 0; 5852 } 5853 seq_printf(m, "status:\t\tsupported\n"); 5854 5855 if (led_supported == TPACPI_LED_570) { 5856 /* 570 */ 5857 int i, status; 5858 for (i = 0; i < 8; i++) { 5859 status = led_get_status(i); 5860 if (status < 0) 5861 return -EIO; 5862 seq_printf(m, "%d:\t\t%s\n", 5863 i, str_led_status(status)); 5864 } 5865 } 5866 5867 seq_printf(m, "commands:\t" 5868 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5869 5870 return 0; 5871 } 5872 5873 static int led_write(char *buf) 5874 { 5875 char *cmd; 5876 int led, rc; 5877 enum led_status_t s; 5878 5879 if (!led_supported) 5880 return -ENODEV; 5881 5882 while ((cmd = next_cmd(&buf))) { 5883 if (sscanf(cmd, "%d", &led) != 1) 5884 return -EINVAL; 5885 5886 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 5887 tpacpi_leds[led].led < 0) 5888 return -ENODEV; 5889 5890 if (strstr(cmd, "off")) { 5891 s = TPACPI_LED_OFF; 5892 } else if (strstr(cmd, "on")) { 5893 s = TPACPI_LED_ON; 5894 } else if (strstr(cmd, "blink")) { 5895 s = TPACPI_LED_BLINK; 5896 } else { 5897 return -EINVAL; 5898 } 5899 5900 rc = led_set_status(led, s); 5901 if (rc < 0) 5902 return rc; 5903 } 5904 5905 return 0; 5906 } 5907 5908 static struct ibm_struct led_driver_data = { 5909 .name = "led", 5910 .read = led_read, 5911 .write = led_write, 5912 .exit = led_exit, 5913 }; 5914 5915 /************************************************************************* 5916 * Beep subdriver 5917 */ 5918 5919 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5920 5921 #define TPACPI_BEEP_Q1 0x0001 5922 5923 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5924 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5925 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5926 }; 5927 5928 static int __init beep_init(struct ibm_init_struct *iibm) 5929 { 5930 unsigned long quirks; 5931 5932 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5933 5934 TPACPI_ACPIHANDLE_INIT(beep); 5935 5936 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5937 str_supported(beep_handle != NULL)); 5938 5939 quirks = tpacpi_check_quirks(beep_quirk_table, 5940 ARRAY_SIZE(beep_quirk_table)); 5941 5942 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5943 5944 return (beep_handle) ? 0 : 1; 5945 } 5946 5947 static int beep_read(struct seq_file *m) 5948 { 5949 if (!beep_handle) 5950 seq_printf(m, "status:\t\tnot supported\n"); 5951 else { 5952 seq_printf(m, "status:\t\tsupported\n"); 5953 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5954 } 5955 5956 return 0; 5957 } 5958 5959 static int beep_write(char *buf) 5960 { 5961 char *cmd; 5962 int beep_cmd; 5963 5964 if (!beep_handle) 5965 return -ENODEV; 5966 5967 while ((cmd = next_cmd(&buf))) { 5968 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 5969 beep_cmd >= 0 && beep_cmd <= 17) { 5970 /* beep_cmd set */ 5971 } else 5972 return -EINVAL; 5973 if (tp_features.beep_needs_two_args) { 5974 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 5975 beep_cmd, 0)) 5976 return -EIO; 5977 } else { 5978 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 5979 beep_cmd)) 5980 return -EIO; 5981 } 5982 } 5983 5984 return 0; 5985 } 5986 5987 static struct ibm_struct beep_driver_data = { 5988 .name = "beep", 5989 .read = beep_read, 5990 .write = beep_write, 5991 }; 5992 5993 /************************************************************************* 5994 * Thermal subdriver 5995 */ 5996 5997 enum thermal_access_mode { 5998 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 5999 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6000 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6001 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6002 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6003 }; 6004 6005 enum { /* TPACPI_THERMAL_TPEC_* */ 6006 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6007 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6008 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6009 6010 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6011 }; 6012 6013 6014 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6015 struct ibm_thermal_sensors_struct { 6016 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6017 }; 6018 6019 static enum thermal_access_mode thermal_read_mode; 6020 6021 /* idx is zero-based */ 6022 static int thermal_get_sensor(int idx, s32 *value) 6023 { 6024 int t; 6025 s8 tmp; 6026 char tmpi[5]; 6027 6028 t = TP_EC_THERMAL_TMP0; 6029 6030 switch (thermal_read_mode) { 6031 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6032 case TPACPI_THERMAL_TPEC_16: 6033 if (idx >= 8 && idx <= 15) { 6034 t = TP_EC_THERMAL_TMP8; 6035 idx -= 8; 6036 } 6037 /* fallthrough */ 6038 #endif 6039 case TPACPI_THERMAL_TPEC_8: 6040 if (idx <= 7) { 6041 if (!acpi_ec_read(t + idx, &tmp)) 6042 return -EIO; 6043 *value = tmp * 1000; 6044 return 0; 6045 } 6046 break; 6047 6048 case TPACPI_THERMAL_ACPI_UPDT: 6049 if (idx <= 7) { 6050 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6051 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6052 return -EIO; 6053 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6054 return -EIO; 6055 *value = (t - 2732) * 100; 6056 return 0; 6057 } 6058 break; 6059 6060 case TPACPI_THERMAL_ACPI_TMP07: 6061 if (idx <= 7) { 6062 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6063 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6064 return -EIO; 6065 if (t > 127 || t < -127) 6066 t = TP_EC_THERMAL_TMP_NA; 6067 *value = t * 1000; 6068 return 0; 6069 } 6070 break; 6071 6072 case TPACPI_THERMAL_NONE: 6073 default: 6074 return -ENOSYS; 6075 } 6076 6077 return -EINVAL; 6078 } 6079 6080 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6081 { 6082 int res, i; 6083 int n; 6084 6085 n = 8; 6086 i = 0; 6087 6088 if (!s) 6089 return -EINVAL; 6090 6091 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6092 n = 16; 6093 6094 for (i = 0 ; i < n; i++) { 6095 res = thermal_get_sensor(i, &s->temp[i]); 6096 if (res) 6097 return res; 6098 } 6099 6100 return n; 6101 } 6102 6103 static void thermal_dump_all_sensors(void) 6104 { 6105 int n, i; 6106 struct ibm_thermal_sensors_struct t; 6107 6108 n = thermal_get_sensors(&t); 6109 if (n <= 0) 6110 return; 6111 6112 pr_notice("temperatures (Celsius):"); 6113 6114 for (i = 0; i < n; i++) { 6115 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6116 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6117 else 6118 pr_cont(" N/A"); 6119 } 6120 6121 pr_cont("\n"); 6122 } 6123 6124 /* sysfs temp##_input -------------------------------------------------- */ 6125 6126 static ssize_t thermal_temp_input_show(struct device *dev, 6127 struct device_attribute *attr, 6128 char *buf) 6129 { 6130 struct sensor_device_attribute *sensor_attr = 6131 to_sensor_dev_attr(attr); 6132 int idx = sensor_attr->index; 6133 s32 value; 6134 int res; 6135 6136 res = thermal_get_sensor(idx, &value); 6137 if (res) 6138 return res; 6139 if (value == TPACPI_THERMAL_SENSOR_NA) 6140 return -ENXIO; 6141 6142 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6143 } 6144 6145 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6146 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6147 thermal_temp_input_show, NULL, _idxB) 6148 6149 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6150 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6151 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6152 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6153 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6154 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6155 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6156 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6157 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6158 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6159 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6160 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6161 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6162 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6163 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6164 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6165 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6166 }; 6167 6168 #define THERMAL_ATTRS(X) \ 6169 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6170 6171 static struct attribute *thermal_temp_input_attr[] = { 6172 THERMAL_ATTRS(8), 6173 THERMAL_ATTRS(9), 6174 THERMAL_ATTRS(10), 6175 THERMAL_ATTRS(11), 6176 THERMAL_ATTRS(12), 6177 THERMAL_ATTRS(13), 6178 THERMAL_ATTRS(14), 6179 THERMAL_ATTRS(15), 6180 THERMAL_ATTRS(0), 6181 THERMAL_ATTRS(1), 6182 THERMAL_ATTRS(2), 6183 THERMAL_ATTRS(3), 6184 THERMAL_ATTRS(4), 6185 THERMAL_ATTRS(5), 6186 THERMAL_ATTRS(6), 6187 THERMAL_ATTRS(7), 6188 NULL 6189 }; 6190 6191 static const struct attribute_group thermal_temp_input16_group = { 6192 .attrs = thermal_temp_input_attr 6193 }; 6194 6195 static const struct attribute_group thermal_temp_input8_group = { 6196 .attrs = &thermal_temp_input_attr[8] 6197 }; 6198 6199 #undef THERMAL_SENSOR_ATTR_TEMP 6200 #undef THERMAL_ATTRS 6201 6202 /* --------------------------------------------------------------------- */ 6203 6204 static int __init thermal_init(struct ibm_init_struct *iibm) 6205 { 6206 u8 t, ta1, ta2; 6207 int i; 6208 int acpi_tmp7; 6209 int res; 6210 6211 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6212 6213 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6214 6215 if (thinkpad_id.ec_model) { 6216 /* 6217 * Direct EC access mode: sensors at registers 6218 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6219 * non-implemented, thermal sensors return 0x80 when 6220 * not available 6221 */ 6222 6223 ta1 = ta2 = 0; 6224 for (i = 0; i < 8; i++) { 6225 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6226 ta1 |= t; 6227 } else { 6228 ta1 = 0; 6229 break; 6230 } 6231 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6232 ta2 |= t; 6233 } else { 6234 ta1 = 0; 6235 break; 6236 } 6237 } 6238 if (ta1 == 0) { 6239 /* This is sheer paranoia, but we handle it anyway */ 6240 if (acpi_tmp7) { 6241 pr_err("ThinkPad ACPI EC access misbehaving, " 6242 "falling back to ACPI TMPx access " 6243 "mode\n"); 6244 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6245 } else { 6246 pr_err("ThinkPad ACPI EC access misbehaving, " 6247 "disabling thermal sensors access\n"); 6248 thermal_read_mode = TPACPI_THERMAL_NONE; 6249 } 6250 } else { 6251 thermal_read_mode = 6252 (ta2 != 0) ? 6253 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6254 } 6255 } else if (acpi_tmp7) { 6256 if (tpacpi_is_ibm() && 6257 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6258 /* 600e/x, 770e, 770x */ 6259 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6260 } else { 6261 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6262 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6263 } 6264 } else { 6265 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6266 thermal_read_mode = TPACPI_THERMAL_NONE; 6267 } 6268 6269 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6270 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6271 thermal_read_mode); 6272 6273 switch (thermal_read_mode) { 6274 case TPACPI_THERMAL_TPEC_16: 6275 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 6276 &thermal_temp_input16_group); 6277 if (res) 6278 return res; 6279 break; 6280 case TPACPI_THERMAL_TPEC_8: 6281 case TPACPI_THERMAL_ACPI_TMP07: 6282 case TPACPI_THERMAL_ACPI_UPDT: 6283 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 6284 &thermal_temp_input8_group); 6285 if (res) 6286 return res; 6287 break; 6288 case TPACPI_THERMAL_NONE: 6289 default: 6290 return 1; 6291 } 6292 6293 return 0; 6294 } 6295 6296 static void thermal_exit(void) 6297 { 6298 switch (thermal_read_mode) { 6299 case TPACPI_THERMAL_TPEC_16: 6300 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 6301 &thermal_temp_input16_group); 6302 break; 6303 case TPACPI_THERMAL_TPEC_8: 6304 case TPACPI_THERMAL_ACPI_TMP07: 6305 case TPACPI_THERMAL_ACPI_UPDT: 6306 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 6307 &thermal_temp_input8_group); 6308 break; 6309 case TPACPI_THERMAL_NONE: 6310 default: 6311 break; 6312 } 6313 } 6314 6315 static int thermal_read(struct seq_file *m) 6316 { 6317 int n, i; 6318 struct ibm_thermal_sensors_struct t; 6319 6320 n = thermal_get_sensors(&t); 6321 if (unlikely(n < 0)) 6322 return n; 6323 6324 seq_printf(m, "temperatures:\t"); 6325 6326 if (n > 0) { 6327 for (i = 0; i < (n - 1); i++) 6328 seq_printf(m, "%d ", t.temp[i] / 1000); 6329 seq_printf(m, "%d\n", t.temp[i] / 1000); 6330 } else 6331 seq_printf(m, "not supported\n"); 6332 6333 return 0; 6334 } 6335 6336 static struct ibm_struct thermal_driver_data = { 6337 .name = "thermal", 6338 .read = thermal_read, 6339 .exit = thermal_exit, 6340 }; 6341 6342 /************************************************************************* 6343 * Backlight/brightness subdriver 6344 */ 6345 6346 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6347 6348 /* 6349 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6350 * CMOS NVRAM byte 0x5E, bits 0-3. 6351 * 6352 * EC HBRV (0x31) has the following layout 6353 * Bit 7: unknown function 6354 * Bit 6: unknown function 6355 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6356 * Bit 4: must be set to zero to avoid problems 6357 * Bit 3-0: backlight brightness level 6358 * 6359 * brightness_get_raw returns status data in the HBRV layout 6360 * 6361 * WARNING: The X61 has been verified to use HBRV for something else, so 6362 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6363 * testing on the very early *60 Lenovo models... 6364 */ 6365 6366 enum { 6367 TP_EC_BACKLIGHT = 0x31, 6368 6369 /* TP_EC_BACKLIGHT bitmasks */ 6370 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6371 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6372 TP_EC_BACKLIGHT_MAPSW = 0x20, 6373 }; 6374 6375 enum tpacpi_brightness_access_mode { 6376 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6377 TPACPI_BRGHT_MODE_EC, /* EC control */ 6378 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6379 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6380 TPACPI_BRGHT_MODE_MAX 6381 }; 6382 6383 static struct backlight_device *ibm_backlight_device; 6384 6385 static enum tpacpi_brightness_access_mode brightness_mode = 6386 TPACPI_BRGHT_MODE_MAX; 6387 6388 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6389 6390 static struct mutex brightness_mutex; 6391 6392 /* NVRAM brightness access, 6393 * call with brightness_mutex held! */ 6394 static unsigned int tpacpi_brightness_nvram_get(void) 6395 { 6396 u8 lnvram; 6397 6398 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6399 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6400 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6401 lnvram &= bright_maxlvl; 6402 6403 return lnvram; 6404 } 6405 6406 static void tpacpi_brightness_checkpoint_nvram(void) 6407 { 6408 u8 lec = 0; 6409 u8 b_nvram; 6410 6411 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6412 return; 6413 6414 vdbg_printk(TPACPI_DBG_BRGHT, 6415 "trying to checkpoint backlight level to NVRAM...\n"); 6416 6417 if (mutex_lock_killable(&brightness_mutex) < 0) 6418 return; 6419 6420 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6421 goto unlock; 6422 lec &= TP_EC_BACKLIGHT_LVLMSK; 6423 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6424 6425 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6426 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6427 /* NVRAM needs update */ 6428 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6429 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6430 b_nvram |= lec; 6431 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6432 dbg_printk(TPACPI_DBG_BRGHT, 6433 "updated NVRAM backlight level to %u (0x%02x)\n", 6434 (unsigned int) lec, (unsigned int) b_nvram); 6435 } else 6436 vdbg_printk(TPACPI_DBG_BRGHT, 6437 "NVRAM backlight level already is %u (0x%02x)\n", 6438 (unsigned int) lec, (unsigned int) b_nvram); 6439 6440 unlock: 6441 mutex_unlock(&brightness_mutex); 6442 } 6443 6444 6445 /* call with brightness_mutex held! */ 6446 static int tpacpi_brightness_get_raw(int *status) 6447 { 6448 u8 lec = 0; 6449 6450 switch (brightness_mode) { 6451 case TPACPI_BRGHT_MODE_UCMS_STEP: 6452 *status = tpacpi_brightness_nvram_get(); 6453 return 0; 6454 case TPACPI_BRGHT_MODE_EC: 6455 case TPACPI_BRGHT_MODE_ECNVRAM: 6456 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6457 return -EIO; 6458 *status = lec; 6459 return 0; 6460 default: 6461 return -ENXIO; 6462 } 6463 } 6464 6465 /* call with brightness_mutex held! */ 6466 /* do NOT call with illegal backlight level value */ 6467 static int tpacpi_brightness_set_ec(unsigned int value) 6468 { 6469 u8 lec = 0; 6470 6471 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6472 return -EIO; 6473 6474 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6475 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6476 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6477 return -EIO; 6478 6479 return 0; 6480 } 6481 6482 /* call with brightness_mutex held! */ 6483 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6484 { 6485 int cmos_cmd, inc; 6486 unsigned int current_value, i; 6487 6488 current_value = tpacpi_brightness_nvram_get(); 6489 6490 if (value == current_value) 6491 return 0; 6492 6493 cmos_cmd = (value > current_value) ? 6494 TP_CMOS_BRIGHTNESS_UP : 6495 TP_CMOS_BRIGHTNESS_DOWN; 6496 inc = (value > current_value) ? 1 : -1; 6497 6498 for (i = current_value; i != value; i += inc) 6499 if (issue_thinkpad_cmos_command(cmos_cmd)) 6500 return -EIO; 6501 6502 return 0; 6503 } 6504 6505 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6506 static int brightness_set(unsigned int value) 6507 { 6508 int res; 6509 6510 if (value > bright_maxlvl) 6511 return -EINVAL; 6512 6513 vdbg_printk(TPACPI_DBG_BRGHT, 6514 "set backlight level to %d\n", value); 6515 6516 res = mutex_lock_killable(&brightness_mutex); 6517 if (res < 0) 6518 return res; 6519 6520 switch (brightness_mode) { 6521 case TPACPI_BRGHT_MODE_EC: 6522 case TPACPI_BRGHT_MODE_ECNVRAM: 6523 res = tpacpi_brightness_set_ec(value); 6524 break; 6525 case TPACPI_BRGHT_MODE_UCMS_STEP: 6526 res = tpacpi_brightness_set_ucmsstep(value); 6527 break; 6528 default: 6529 res = -ENXIO; 6530 } 6531 6532 mutex_unlock(&brightness_mutex); 6533 return res; 6534 } 6535 6536 /* sysfs backlight class ----------------------------------------------- */ 6537 6538 static int brightness_update_status(struct backlight_device *bd) 6539 { 6540 unsigned int level = 6541 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6542 bd->props.power == FB_BLANK_UNBLANK) ? 6543 bd->props.brightness : 0; 6544 6545 dbg_printk(TPACPI_DBG_BRGHT, 6546 "backlight: attempt to set level to %d\n", 6547 level); 6548 6549 /* it is the backlight class's job (caller) to handle 6550 * EINTR and other errors properly */ 6551 return brightness_set(level); 6552 } 6553 6554 static int brightness_get(struct backlight_device *bd) 6555 { 6556 int status, res; 6557 6558 res = mutex_lock_killable(&brightness_mutex); 6559 if (res < 0) 6560 return 0; 6561 6562 res = tpacpi_brightness_get_raw(&status); 6563 6564 mutex_unlock(&brightness_mutex); 6565 6566 if (res < 0) 6567 return 0; 6568 6569 return status & TP_EC_BACKLIGHT_LVLMSK; 6570 } 6571 6572 static void tpacpi_brightness_notify_change(void) 6573 { 6574 backlight_force_update(ibm_backlight_device, 6575 BACKLIGHT_UPDATE_HOTKEY); 6576 } 6577 6578 static const struct backlight_ops ibm_backlight_data = { 6579 .get_brightness = brightness_get, 6580 .update_status = brightness_update_status, 6581 }; 6582 6583 /* --------------------------------------------------------------------- */ 6584 6585 /* 6586 * Call _BCL method of video device. On some ThinkPads this will 6587 * switch the firmware to the ACPI brightness control mode. 6588 */ 6589 6590 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6591 { 6592 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6593 union acpi_object *obj; 6594 struct acpi_device *device, *child; 6595 int rc; 6596 6597 if (acpi_bus_get_device(handle, &device)) 6598 return 0; 6599 6600 rc = 0; 6601 list_for_each_entry(child, &device->children, node) { 6602 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6603 NULL, &buffer); 6604 if (ACPI_FAILURE(status)) 6605 continue; 6606 6607 obj = (union acpi_object *)buffer.pointer; 6608 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6609 pr_err("Unknown _BCL data, please report this to %s\n", 6610 TPACPI_MAIL); 6611 rc = 0; 6612 } else { 6613 rc = obj->package.count; 6614 } 6615 break; 6616 } 6617 6618 kfree(buffer.pointer); 6619 return rc; 6620 } 6621 6622 6623 /* 6624 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6625 */ 6626 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6627 { 6628 acpi_handle video_device; 6629 int bcl_levels = 0; 6630 6631 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6632 if (video_device) 6633 bcl_levels = tpacpi_query_bcl_levels(video_device); 6634 6635 tp_features.bright_acpimode = (bcl_levels > 0); 6636 6637 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6638 } 6639 6640 /* 6641 * These are only useful for models that have only one possibility 6642 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6643 * these quirks. 6644 */ 6645 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6646 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6647 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6648 6649 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6650 /* Models with ATI GPUs known to require ECNVRAM mode */ 6651 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6652 6653 /* Models with ATI GPUs that can use ECNVRAM */ 6654 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6655 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6656 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6657 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6658 6659 /* Models with Intel Extreme Graphics 2 */ 6660 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6661 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6662 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6663 6664 /* Models with Intel GMA900 */ 6665 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6666 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6667 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6668 }; 6669 6670 /* 6671 * Returns < 0 for error, otherwise sets tp_features.bright_* 6672 * and bright_maxlvl. 6673 */ 6674 static void __init tpacpi_detect_brightness_capabilities(void) 6675 { 6676 unsigned int b; 6677 6678 vdbg_printk(TPACPI_DBG_INIT, 6679 "detecting firmware brightness interface capabilities\n"); 6680 6681 /* we could run a quirks check here (same table used by 6682 * brightness_init) if needed */ 6683 6684 /* 6685 * We always attempt to detect acpi support, so as to switch 6686 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6687 * going to publish a backlight interface 6688 */ 6689 b = tpacpi_check_std_acpi_brightness_support(); 6690 switch (b) { 6691 case 16: 6692 bright_maxlvl = 15; 6693 break; 6694 case 8: 6695 case 0: 6696 bright_maxlvl = 7; 6697 break; 6698 default: 6699 tp_features.bright_unkfw = 1; 6700 bright_maxlvl = b - 1; 6701 } 6702 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6703 } 6704 6705 static int __init brightness_init(struct ibm_init_struct *iibm) 6706 { 6707 struct backlight_properties props; 6708 int b; 6709 unsigned long quirks; 6710 6711 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6712 6713 mutex_init(&brightness_mutex); 6714 6715 quirks = tpacpi_check_quirks(brightness_quirk_table, 6716 ARRAY_SIZE(brightness_quirk_table)); 6717 6718 /* tpacpi_detect_brightness_capabilities() must have run already */ 6719 6720 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6721 if (tp_features.bright_unkfw) 6722 return 1; 6723 6724 if (!brightness_enable) { 6725 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6726 "brightness support disabled by " 6727 "module parameter\n"); 6728 return 1; 6729 } 6730 6731 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6732 if (brightness_enable > 1) { 6733 pr_info("Standard ACPI backlight interface " 6734 "available, not loading native one\n"); 6735 return 1; 6736 } else if (brightness_enable == 1) { 6737 pr_warn("Cannot enable backlight brightness support, " 6738 "ACPI is already handling it. Refer to the " 6739 "acpi_backlight kernel parameter.\n"); 6740 return 1; 6741 } 6742 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6743 pr_notice("Standard ACPI backlight interface not " 6744 "available, thinkpad_acpi native " 6745 "brightness control enabled\n"); 6746 } 6747 6748 /* 6749 * Check for module parameter bogosity, note that we 6750 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6751 * able to detect "unspecified" 6752 */ 6753 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6754 return -EINVAL; 6755 6756 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6757 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6758 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6759 if (quirks & TPACPI_BRGHT_Q_EC) 6760 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6761 else 6762 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6763 6764 dbg_printk(TPACPI_DBG_BRGHT, 6765 "driver auto-selected brightness_mode=%d\n", 6766 brightness_mode); 6767 } 6768 6769 /* Safety */ 6770 if (!tpacpi_is_ibm() && 6771 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6772 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6773 return -EINVAL; 6774 6775 if (tpacpi_brightness_get_raw(&b) < 0) 6776 return 1; 6777 6778 memset(&props, 0, sizeof(struct backlight_properties)); 6779 props.type = BACKLIGHT_PLATFORM; 6780 props.max_brightness = bright_maxlvl; 6781 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6782 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6783 NULL, NULL, 6784 &ibm_backlight_data, 6785 &props); 6786 if (IS_ERR(ibm_backlight_device)) { 6787 int rc = PTR_ERR(ibm_backlight_device); 6788 ibm_backlight_device = NULL; 6789 pr_err("Could not register backlight device\n"); 6790 return rc; 6791 } 6792 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6793 "brightness is supported\n"); 6794 6795 if (quirks & TPACPI_BRGHT_Q_ASK) { 6796 pr_notice("brightness: will use unverified default: " 6797 "brightness_mode=%d\n", brightness_mode); 6798 pr_notice("brightness: please report to %s whether it works well " 6799 "or not on your ThinkPad\n", TPACPI_MAIL); 6800 } 6801 6802 /* Added by mistake in early 2007. Probably useless, but it could 6803 * be working around some unknown firmware problem where the value 6804 * read at startup doesn't match the real hardware state... so leave 6805 * it in place just in case */ 6806 backlight_update_status(ibm_backlight_device); 6807 6808 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6809 "brightness: registering brightness hotkeys " 6810 "as change notification\n"); 6811 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6812 | TP_ACPI_HKEY_BRGHTUP_MASK 6813 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6814 return 0; 6815 } 6816 6817 static void brightness_suspend(void) 6818 { 6819 tpacpi_brightness_checkpoint_nvram(); 6820 } 6821 6822 static void brightness_shutdown(void) 6823 { 6824 tpacpi_brightness_checkpoint_nvram(); 6825 } 6826 6827 static void brightness_exit(void) 6828 { 6829 if (ibm_backlight_device) { 6830 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6831 "calling backlight_device_unregister()\n"); 6832 backlight_device_unregister(ibm_backlight_device); 6833 } 6834 6835 tpacpi_brightness_checkpoint_nvram(); 6836 } 6837 6838 static int brightness_read(struct seq_file *m) 6839 { 6840 int level; 6841 6842 level = brightness_get(NULL); 6843 if (level < 0) { 6844 seq_printf(m, "level:\t\tunreadable\n"); 6845 } else { 6846 seq_printf(m, "level:\t\t%d\n", level); 6847 seq_printf(m, "commands:\tup, down\n"); 6848 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6849 bright_maxlvl); 6850 } 6851 6852 return 0; 6853 } 6854 6855 static int brightness_write(char *buf) 6856 { 6857 int level; 6858 int rc; 6859 char *cmd; 6860 6861 level = brightness_get(NULL); 6862 if (level < 0) 6863 return level; 6864 6865 while ((cmd = next_cmd(&buf))) { 6866 if (strlencmp(cmd, "up") == 0) { 6867 if (level < bright_maxlvl) 6868 level++; 6869 } else if (strlencmp(cmd, "down") == 0) { 6870 if (level > 0) 6871 level--; 6872 } else if (sscanf(cmd, "level %d", &level) == 1 && 6873 level >= 0 && level <= bright_maxlvl) { 6874 /* new level set */ 6875 } else 6876 return -EINVAL; 6877 } 6878 6879 tpacpi_disclose_usertask("procfs brightness", 6880 "set level to %d\n", level); 6881 6882 /* 6883 * Now we know what the final level should be, so we try to set it. 6884 * Doing it this way makes the syscall restartable in case of EINTR 6885 */ 6886 rc = brightness_set(level); 6887 if (!rc && ibm_backlight_device) 6888 backlight_force_update(ibm_backlight_device, 6889 BACKLIGHT_UPDATE_SYSFS); 6890 return (rc == -EINTR) ? -ERESTARTSYS : rc; 6891 } 6892 6893 static struct ibm_struct brightness_driver_data = { 6894 .name = "brightness", 6895 .read = brightness_read, 6896 .write = brightness_write, 6897 .exit = brightness_exit, 6898 .suspend = brightness_suspend, 6899 .shutdown = brightness_shutdown, 6900 }; 6901 6902 /************************************************************************* 6903 * Volume subdriver 6904 */ 6905 6906 /* 6907 * IBM ThinkPads have a simple volume controller with MUTE gating. 6908 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 6909 * 6910 * Since the *61 series (and probably also the later *60 series), Lenovo 6911 * ThinkPads only implement the MUTE gate. 6912 * 6913 * EC register 0x30 6914 * Bit 6: MUTE (1 mutes sound) 6915 * Bit 3-0: Volume 6916 * Other bits should be zero as far as we know. 6917 * 6918 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 6919 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 6920 * such as bit 7 which is used to detect repeated presses of MUTE, 6921 * and we leave them unchanged. 6922 * 6923 * On newer Lenovo ThinkPads, the EC can automatically change the volume 6924 * in response to user input. Unfortunately, this rarely works well. 6925 * The laptop changes the state of its internal MUTE gate and, on some 6926 * models, sends KEY_MUTE, causing any user code that responds to the 6927 * mute button to get confused. The hardware MUTE gate is also 6928 * unnecessary, since user code can handle the mute button without 6929 * kernel or EC help. 6930 * 6931 * To avoid confusing userspace, we simply disable all EC-based mute 6932 * and volume controls when possible. 6933 */ 6934 6935 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 6936 6937 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 6938 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 6939 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 6940 6941 #if SNDRV_CARDS <= 32 6942 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 6943 #else 6944 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 6945 #endif 6946 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 6947 static char *alsa_id = "ThinkPadEC"; 6948 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 6949 6950 struct tpacpi_alsa_data { 6951 struct snd_card *card; 6952 struct snd_ctl_elem_id *ctl_mute_id; 6953 struct snd_ctl_elem_id *ctl_vol_id; 6954 }; 6955 6956 static struct snd_card *alsa_card; 6957 6958 enum { 6959 TP_EC_AUDIO = 0x30, 6960 6961 /* TP_EC_AUDIO bits */ 6962 TP_EC_AUDIO_MUTESW = 6, 6963 6964 /* TP_EC_AUDIO bitmasks */ 6965 TP_EC_AUDIO_LVL_MSK = 0x0F, 6966 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 6967 6968 /* Maximum volume */ 6969 TP_EC_VOLUME_MAX = 14, 6970 }; 6971 6972 enum tpacpi_volume_access_mode { 6973 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 6974 TPACPI_VOL_MODE_EC, /* Pure EC control */ 6975 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 6976 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6977 TPACPI_VOL_MODE_MAX 6978 }; 6979 6980 enum tpacpi_volume_capabilities { 6981 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 6982 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 6983 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 6984 TPACPI_VOL_CAP_MAX 6985 }; 6986 6987 enum tpacpi_mute_btn_mode { 6988 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 6989 /* We don't know what mode 1 is. */ 6990 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 6991 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 6992 }; 6993 6994 static enum tpacpi_volume_access_mode volume_mode = 6995 TPACPI_VOL_MODE_MAX; 6996 6997 static enum tpacpi_volume_capabilities volume_capabilities; 6998 static bool volume_control_allowed; 6999 static bool software_mute_requested = true; 7000 static bool software_mute_active; 7001 static int software_mute_orig_mode; 7002 7003 /* 7004 * Used to syncronize writers to TP_EC_AUDIO and 7005 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7006 */ 7007 static struct mutex volume_mutex; 7008 7009 static void tpacpi_volume_checkpoint_nvram(void) 7010 { 7011 u8 lec = 0; 7012 u8 b_nvram; 7013 u8 ec_mask; 7014 7015 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7016 return; 7017 if (!volume_control_allowed) 7018 return; 7019 if (software_mute_active) 7020 return; 7021 7022 vdbg_printk(TPACPI_DBG_MIXER, 7023 "trying to checkpoint mixer state to NVRAM...\n"); 7024 7025 if (tp_features.mixer_no_level_control) 7026 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7027 else 7028 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7029 7030 if (mutex_lock_killable(&volume_mutex) < 0) 7031 return; 7032 7033 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7034 goto unlock; 7035 lec &= ec_mask; 7036 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7037 7038 if (lec != (b_nvram & ec_mask)) { 7039 /* NVRAM needs update */ 7040 b_nvram &= ~ec_mask; 7041 b_nvram |= lec; 7042 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7043 dbg_printk(TPACPI_DBG_MIXER, 7044 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7045 (unsigned int) lec, (unsigned int) b_nvram); 7046 } else { 7047 vdbg_printk(TPACPI_DBG_MIXER, 7048 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7049 (unsigned int) lec, (unsigned int) b_nvram); 7050 } 7051 7052 unlock: 7053 mutex_unlock(&volume_mutex); 7054 } 7055 7056 static int volume_get_status_ec(u8 *status) 7057 { 7058 u8 s; 7059 7060 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7061 return -EIO; 7062 7063 *status = s; 7064 7065 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7066 7067 return 0; 7068 } 7069 7070 static int volume_get_status(u8 *status) 7071 { 7072 return volume_get_status_ec(status); 7073 } 7074 7075 static int volume_set_status_ec(const u8 status) 7076 { 7077 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7078 return -EIO; 7079 7080 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7081 7082 /* 7083 * On X200s, and possibly on others, it can take a while for 7084 * reads to become correct. 7085 */ 7086 msleep(1); 7087 7088 return 0; 7089 } 7090 7091 static int volume_set_status(const u8 status) 7092 { 7093 return volume_set_status_ec(status); 7094 } 7095 7096 /* returns < 0 on error, 0 on no change, 1 on change */ 7097 static int __volume_set_mute_ec(const bool mute) 7098 { 7099 int rc; 7100 u8 s, n; 7101 7102 if (mutex_lock_killable(&volume_mutex) < 0) 7103 return -EINTR; 7104 7105 rc = volume_get_status_ec(&s); 7106 if (rc) 7107 goto unlock; 7108 7109 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7110 s & ~TP_EC_AUDIO_MUTESW_MSK; 7111 7112 if (n != s) { 7113 rc = volume_set_status_ec(n); 7114 if (!rc) 7115 rc = 1; 7116 } 7117 7118 unlock: 7119 mutex_unlock(&volume_mutex); 7120 return rc; 7121 } 7122 7123 static int volume_alsa_set_mute(const bool mute) 7124 { 7125 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7126 (mute) ? "" : "un"); 7127 return __volume_set_mute_ec(mute); 7128 } 7129 7130 static int volume_set_mute(const bool mute) 7131 { 7132 int rc; 7133 7134 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7135 (mute) ? "" : "un"); 7136 7137 rc = __volume_set_mute_ec(mute); 7138 return (rc < 0) ? rc : 0; 7139 } 7140 7141 /* returns < 0 on error, 0 on no change, 1 on change */ 7142 static int __volume_set_volume_ec(const u8 vol) 7143 { 7144 int rc; 7145 u8 s, n; 7146 7147 if (vol > TP_EC_VOLUME_MAX) 7148 return -EINVAL; 7149 7150 if (mutex_lock_killable(&volume_mutex) < 0) 7151 return -EINTR; 7152 7153 rc = volume_get_status_ec(&s); 7154 if (rc) 7155 goto unlock; 7156 7157 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7158 7159 if (n != s) { 7160 rc = volume_set_status_ec(n); 7161 if (!rc) 7162 rc = 1; 7163 } 7164 7165 unlock: 7166 mutex_unlock(&volume_mutex); 7167 return rc; 7168 } 7169 7170 static int volume_set_software_mute(bool startup) 7171 { 7172 int result; 7173 7174 if (!tpacpi_is_lenovo()) 7175 return -ENODEV; 7176 7177 if (startup) { 7178 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7179 "HAUM", "qd")) 7180 return -EIO; 7181 7182 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7183 "Initial HAUM setting was %d\n", 7184 software_mute_orig_mode); 7185 } 7186 7187 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7188 (int)TP_EC_MUTE_BTN_NONE)) 7189 return -EIO; 7190 7191 if (result != TP_EC_MUTE_BTN_NONE) 7192 pr_warn("Unexpected SAUM result %d\n", 7193 result); 7194 7195 /* 7196 * In software mute mode, the standard codec controls take 7197 * precendence, so we unmute the ThinkPad HW switch at 7198 * startup. Just on case there are SAUM-capable ThinkPads 7199 * with level controls, set max HW volume as well. 7200 */ 7201 if (tp_features.mixer_no_level_control) 7202 result = volume_set_mute(false); 7203 else 7204 result = volume_set_status(TP_EC_VOLUME_MAX); 7205 7206 if (result != 0) 7207 pr_warn("Failed to unmute the HW mute switch\n"); 7208 7209 return 0; 7210 } 7211 7212 static void volume_exit_software_mute(void) 7213 { 7214 int r; 7215 7216 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7217 || r != software_mute_orig_mode) 7218 pr_warn("Failed to restore mute mode\n"); 7219 } 7220 7221 static int volume_alsa_set_volume(const u8 vol) 7222 { 7223 dbg_printk(TPACPI_DBG_MIXER, 7224 "ALSA: trying to set volume level to %hu\n", vol); 7225 return __volume_set_volume_ec(vol); 7226 } 7227 7228 static void volume_alsa_notify_change(void) 7229 { 7230 struct tpacpi_alsa_data *d; 7231 7232 if (alsa_card && alsa_card->private_data) { 7233 d = alsa_card->private_data; 7234 if (d->ctl_mute_id) 7235 snd_ctl_notify(alsa_card, 7236 SNDRV_CTL_EVENT_MASK_VALUE, 7237 d->ctl_mute_id); 7238 if (d->ctl_vol_id) 7239 snd_ctl_notify(alsa_card, 7240 SNDRV_CTL_EVENT_MASK_VALUE, 7241 d->ctl_vol_id); 7242 } 7243 } 7244 7245 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7246 struct snd_ctl_elem_info *uinfo) 7247 { 7248 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7249 uinfo->count = 1; 7250 uinfo->value.integer.min = 0; 7251 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7252 return 0; 7253 } 7254 7255 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7256 struct snd_ctl_elem_value *ucontrol) 7257 { 7258 u8 s; 7259 int rc; 7260 7261 rc = volume_get_status(&s); 7262 if (rc < 0) 7263 return rc; 7264 7265 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7266 return 0; 7267 } 7268 7269 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7270 struct snd_ctl_elem_value *ucontrol) 7271 { 7272 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7273 ucontrol->value.integer.value[0]); 7274 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7275 } 7276 7277 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7278 7279 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7280 struct snd_ctl_elem_value *ucontrol) 7281 { 7282 u8 s; 7283 int rc; 7284 7285 rc = volume_get_status(&s); 7286 if (rc < 0) 7287 return rc; 7288 7289 ucontrol->value.integer.value[0] = 7290 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7291 return 0; 7292 } 7293 7294 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7295 struct snd_ctl_elem_value *ucontrol) 7296 { 7297 tpacpi_disclose_usertask("ALSA", "%smute\n", 7298 ucontrol->value.integer.value[0] ? 7299 "un" : ""); 7300 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7301 } 7302 7303 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7304 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7305 .name = "Console Playback Volume", 7306 .index = 0, 7307 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7308 .info = volume_alsa_vol_info, 7309 .get = volume_alsa_vol_get, 7310 }; 7311 7312 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7313 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7314 .name = "Console Playback Switch", 7315 .index = 0, 7316 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7317 .info = volume_alsa_mute_info, 7318 .get = volume_alsa_mute_get, 7319 }; 7320 7321 static void volume_suspend(void) 7322 { 7323 tpacpi_volume_checkpoint_nvram(); 7324 } 7325 7326 static void volume_resume(void) 7327 { 7328 if (software_mute_active) { 7329 if (volume_set_software_mute(false) < 0) 7330 pr_warn("Failed to restore software mute\n"); 7331 } else { 7332 volume_alsa_notify_change(); 7333 } 7334 } 7335 7336 static void volume_shutdown(void) 7337 { 7338 tpacpi_volume_checkpoint_nvram(); 7339 } 7340 7341 static void volume_exit(void) 7342 { 7343 if (alsa_card) { 7344 snd_card_free(alsa_card); 7345 alsa_card = NULL; 7346 } 7347 7348 tpacpi_volume_checkpoint_nvram(); 7349 7350 if (software_mute_active) 7351 volume_exit_software_mute(); 7352 } 7353 7354 static int __init volume_create_alsa_mixer(void) 7355 { 7356 struct snd_card *card; 7357 struct tpacpi_alsa_data *data; 7358 struct snd_kcontrol *ctl_vol; 7359 struct snd_kcontrol *ctl_mute; 7360 int rc; 7361 7362 rc = snd_card_new(&tpacpi_pdev->dev, 7363 alsa_index, alsa_id, THIS_MODULE, 7364 sizeof(struct tpacpi_alsa_data), &card); 7365 if (rc < 0 || !card) { 7366 pr_err("Failed to create ALSA card structures: %d\n", rc); 7367 return 1; 7368 } 7369 7370 BUG_ON(!card->private_data); 7371 data = card->private_data; 7372 data->card = card; 7373 7374 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7375 sizeof(card->driver)); 7376 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7377 sizeof(card->shortname)); 7378 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7379 (thinkpad_id.ec_version_str) ? 7380 thinkpad_id.ec_version_str : "(unknown)"); 7381 snprintf(card->longname, sizeof(card->longname), 7382 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7383 (thinkpad_id.ec_version_str) ? 7384 thinkpad_id.ec_version_str : "unknown"); 7385 7386 if (volume_control_allowed) { 7387 volume_alsa_control_vol.put = volume_alsa_vol_put; 7388 volume_alsa_control_vol.access = 7389 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7390 7391 volume_alsa_control_mute.put = volume_alsa_mute_put; 7392 volume_alsa_control_mute.access = 7393 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7394 } 7395 7396 if (!tp_features.mixer_no_level_control) { 7397 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7398 rc = snd_ctl_add(card, ctl_vol); 7399 if (rc < 0) { 7400 pr_err("Failed to create ALSA volume control: %d\n", 7401 rc); 7402 goto err_exit; 7403 } 7404 data->ctl_vol_id = &ctl_vol->id; 7405 } 7406 7407 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7408 rc = snd_ctl_add(card, ctl_mute); 7409 if (rc < 0) { 7410 pr_err("Failed to create ALSA mute control: %d\n", rc); 7411 goto err_exit; 7412 } 7413 data->ctl_mute_id = &ctl_mute->id; 7414 7415 rc = snd_card_register(card); 7416 if (rc < 0) { 7417 pr_err("Failed to register ALSA card: %d\n", rc); 7418 goto err_exit; 7419 } 7420 7421 alsa_card = card; 7422 return 0; 7423 7424 err_exit: 7425 snd_card_free(card); 7426 return 1; 7427 } 7428 7429 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7430 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7431 7432 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7433 /* Whitelist volume level on all IBM by default */ 7434 { .vendor = PCI_VENDOR_ID_IBM, 7435 .bios = TPACPI_MATCH_ANY, 7436 .ec = TPACPI_MATCH_ANY, 7437 .quirks = TPACPI_VOL_Q_LEVEL }, 7438 7439 /* Lenovo models with volume control (needs confirmation) */ 7440 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7441 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7442 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7443 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7444 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7445 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7446 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7447 7448 /* Whitelist mute-only on all Lenovo by default */ 7449 { .vendor = PCI_VENDOR_ID_LENOVO, 7450 .bios = TPACPI_MATCH_ANY, 7451 .ec = TPACPI_MATCH_ANY, 7452 .quirks = TPACPI_VOL_Q_MUTEONLY } 7453 }; 7454 7455 static int __init volume_init(struct ibm_init_struct *iibm) 7456 { 7457 unsigned long quirks; 7458 int rc; 7459 7460 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7461 7462 mutex_init(&volume_mutex); 7463 7464 /* 7465 * Check for module parameter bogosity, note that we 7466 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7467 * able to detect "unspecified" 7468 */ 7469 if (volume_mode > TPACPI_VOL_MODE_MAX) 7470 return -EINVAL; 7471 7472 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7473 pr_err("UCMS step volume mode not implemented, " 7474 "please contact %s\n", TPACPI_MAIL); 7475 return 1; 7476 } 7477 7478 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7479 return -EINVAL; 7480 7481 /* 7482 * The ALSA mixer is our primary interface. 7483 * When disabled, don't install the subdriver at all 7484 */ 7485 if (!alsa_enable) { 7486 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7487 "ALSA mixer disabled by parameter, " 7488 "not loading volume subdriver...\n"); 7489 return 1; 7490 } 7491 7492 quirks = tpacpi_check_quirks(volume_quirk_table, 7493 ARRAY_SIZE(volume_quirk_table)); 7494 7495 switch (volume_capabilities) { 7496 case TPACPI_VOL_CAP_AUTO: 7497 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7498 tp_features.mixer_no_level_control = 1; 7499 else if (quirks & TPACPI_VOL_Q_LEVEL) 7500 tp_features.mixer_no_level_control = 0; 7501 else 7502 return 1; /* no mixer */ 7503 break; 7504 case TPACPI_VOL_CAP_VOLMUTE: 7505 tp_features.mixer_no_level_control = 0; 7506 break; 7507 case TPACPI_VOL_CAP_MUTEONLY: 7508 tp_features.mixer_no_level_control = 1; 7509 break; 7510 default: 7511 return 1; 7512 } 7513 7514 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7515 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7516 "using user-supplied volume_capabilities=%d\n", 7517 volume_capabilities); 7518 7519 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7520 volume_mode == TPACPI_VOL_MODE_MAX) { 7521 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7522 7523 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7524 "driver auto-selected volume_mode=%d\n", 7525 volume_mode); 7526 } else { 7527 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7528 "using user-supplied volume_mode=%d\n", 7529 volume_mode); 7530 } 7531 7532 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7533 "mute is supported, volume control is %s\n", 7534 str_supported(!tp_features.mixer_no_level_control)); 7535 7536 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7537 software_mute_active = true; 7538 } else { 7539 rc = volume_create_alsa_mixer(); 7540 if (rc) { 7541 pr_err("Could not create the ALSA mixer interface\n"); 7542 return rc; 7543 } 7544 7545 pr_info("Console audio control enabled, mode: %s\n", 7546 (volume_control_allowed) ? 7547 "override (read/write)" : 7548 "monitor (read only)"); 7549 } 7550 7551 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7552 "registering volume hotkeys as change notification\n"); 7553 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7554 | TP_ACPI_HKEY_VOLUP_MASK 7555 | TP_ACPI_HKEY_VOLDWN_MASK 7556 | TP_ACPI_HKEY_MUTE_MASK); 7557 7558 return 0; 7559 } 7560 7561 static int volume_read(struct seq_file *m) 7562 { 7563 u8 status; 7564 7565 if (volume_get_status(&status) < 0) { 7566 seq_printf(m, "level:\t\tunreadable\n"); 7567 } else { 7568 if (tp_features.mixer_no_level_control) 7569 seq_printf(m, "level:\t\tunsupported\n"); 7570 else 7571 seq_printf(m, "level:\t\t%d\n", 7572 status & TP_EC_AUDIO_LVL_MSK); 7573 7574 seq_printf(m, "mute:\t\t%s\n", 7575 onoff(status, TP_EC_AUDIO_MUTESW)); 7576 7577 if (volume_control_allowed) { 7578 seq_printf(m, "commands:\tunmute, mute\n"); 7579 if (!tp_features.mixer_no_level_control) { 7580 seq_printf(m, 7581 "commands:\tup, down\n"); 7582 seq_printf(m, 7583 "commands:\tlevel <level>" 7584 " (<level> is 0-%d)\n", 7585 TP_EC_VOLUME_MAX); 7586 } 7587 } 7588 } 7589 7590 return 0; 7591 } 7592 7593 static int volume_write(char *buf) 7594 { 7595 u8 s; 7596 u8 new_level, new_mute; 7597 int l; 7598 char *cmd; 7599 int rc; 7600 7601 /* 7602 * We do allow volume control at driver startup, so that the 7603 * user can set initial state through the volume=... parameter hack. 7604 */ 7605 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7606 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7607 tp_warned.volume_ctrl_forbidden = 1; 7608 pr_notice("Console audio control in monitor mode, " 7609 "changes are not allowed\n"); 7610 pr_notice("Use the volume_control=1 module parameter " 7611 "to enable volume control\n"); 7612 } 7613 return -EPERM; 7614 } 7615 7616 rc = volume_get_status(&s); 7617 if (rc < 0) 7618 return rc; 7619 7620 new_level = s & TP_EC_AUDIO_LVL_MSK; 7621 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7622 7623 while ((cmd = next_cmd(&buf))) { 7624 if (!tp_features.mixer_no_level_control) { 7625 if (strlencmp(cmd, "up") == 0) { 7626 if (new_mute) 7627 new_mute = 0; 7628 else if (new_level < TP_EC_VOLUME_MAX) 7629 new_level++; 7630 continue; 7631 } else if (strlencmp(cmd, "down") == 0) { 7632 if (new_mute) 7633 new_mute = 0; 7634 else if (new_level > 0) 7635 new_level--; 7636 continue; 7637 } else if (sscanf(cmd, "level %u", &l) == 1 && 7638 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7639 new_level = l; 7640 continue; 7641 } 7642 } 7643 if (strlencmp(cmd, "mute") == 0) 7644 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7645 else if (strlencmp(cmd, "unmute") == 0) 7646 new_mute = 0; 7647 else 7648 return -EINVAL; 7649 } 7650 7651 if (tp_features.mixer_no_level_control) { 7652 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7653 new_mute ? "" : "un"); 7654 rc = volume_set_mute(!!new_mute); 7655 } else { 7656 tpacpi_disclose_usertask("procfs volume", 7657 "%smute and set level to %d\n", 7658 new_mute ? "" : "un", new_level); 7659 rc = volume_set_status(new_mute | new_level); 7660 } 7661 volume_alsa_notify_change(); 7662 7663 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7664 } 7665 7666 static struct ibm_struct volume_driver_data = { 7667 .name = "volume", 7668 .read = volume_read, 7669 .write = volume_write, 7670 .exit = volume_exit, 7671 .suspend = volume_suspend, 7672 .resume = volume_resume, 7673 .shutdown = volume_shutdown, 7674 }; 7675 7676 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7677 7678 #define alsa_card NULL 7679 7680 static void inline volume_alsa_notify_change(void) 7681 { 7682 } 7683 7684 static int __init volume_init(struct ibm_init_struct *iibm) 7685 { 7686 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7687 7688 return 1; 7689 } 7690 7691 static struct ibm_struct volume_driver_data = { 7692 .name = "volume", 7693 }; 7694 7695 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7696 7697 /************************************************************************* 7698 * Fan subdriver 7699 */ 7700 7701 /* 7702 * FAN ACCESS MODES 7703 * 7704 * TPACPI_FAN_RD_ACPI_GFAN: 7705 * ACPI GFAN method: returns fan level 7706 * 7707 * see TPACPI_FAN_WR_ACPI_SFAN 7708 * EC 0x2f (HFSP) not available if GFAN exists 7709 * 7710 * TPACPI_FAN_WR_ACPI_SFAN: 7711 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7712 * 7713 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7714 * it for writing. 7715 * 7716 * TPACPI_FAN_WR_TPEC: 7717 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7718 * Supported on almost all ThinkPads 7719 * 7720 * Fan speed changes of any sort (including those caused by the 7721 * disengaged mode) are usually done slowly by the firmware as the 7722 * maximum amount of fan duty cycle change per second seems to be 7723 * limited. 7724 * 7725 * Reading is not available if GFAN exists. 7726 * Writing is not available if SFAN exists. 7727 * 7728 * Bits 7729 * 7 automatic mode engaged; 7730 * (default operation mode of the ThinkPad) 7731 * fan level is ignored in this mode. 7732 * 6 full speed mode (takes precedence over bit 7); 7733 * not available on all thinkpads. May disable 7734 * the tachometer while the fan controller ramps up 7735 * the speed (which can take up to a few *minutes*). 7736 * Speeds up fan to 100% duty-cycle, which is far above 7737 * the standard RPM levels. It is not impossible that 7738 * it could cause hardware damage. 7739 * 5-3 unused in some models. Extra bits for fan level 7740 * in others, but still useless as all values above 7741 * 7 map to the same speed as level 7 in these models. 7742 * 2-0 fan level (0..7 usually) 7743 * 0x00 = stop 7744 * 0x07 = max (set when temperatures critical) 7745 * Some ThinkPads may have other levels, see 7746 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7747 * 7748 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7749 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7750 * does so, its initial value is meaningless (0x07). 7751 * 7752 * For firmware bugs, refer to: 7753 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7754 * 7755 * ---- 7756 * 7757 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7758 * Main fan tachometer reading (in RPM) 7759 * 7760 * This register is present on all ThinkPads with a new-style EC, and 7761 * it is known not to be present on the A21m/e, and T22, as there is 7762 * something else in offset 0x84 according to the ACPI DSDT. Other 7763 * ThinkPads from this same time period (and earlier) probably lack the 7764 * tachometer as well. 7765 * 7766 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7767 * was never fixed by IBM to report the EC firmware version string 7768 * probably support the tachometer (like the early X models), so 7769 * detecting it is quite hard. We need more data to know for sure. 7770 * 7771 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7772 * might result. 7773 * 7774 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7775 * mode. 7776 * 7777 * For firmware bugs, refer to: 7778 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7779 * 7780 * ---- 7781 * 7782 * ThinkPad EC register 0x31 bit 0 (only on select models) 7783 * 7784 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7785 * show the speed of the main fan. When bit 0 of EC register 0x31 7786 * is one, the tachometer registers show the speed of the auxiliary 7787 * fan. 7788 * 7789 * Fan control seems to affect both fans, regardless of the state 7790 * of this bit. 7791 * 7792 * So far, only the firmware for the X60/X61 non-tablet versions 7793 * seem to support this (firmware TP-7M). 7794 * 7795 * TPACPI_FAN_WR_ACPI_FANS: 7796 * ThinkPad X31, X40, X41. Not available in the X60. 7797 * 7798 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7799 * high speed. ACPI DSDT seems to map these three speeds to levels 7800 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7801 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7802 * 7803 * The speeds are stored on handles 7804 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7805 * 7806 * There are three default speed sets, accessible as handles: 7807 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7808 * 7809 * ACPI DSDT switches which set is in use depending on various 7810 * factors. 7811 * 7812 * TPACPI_FAN_WR_TPEC is also available and should be used to 7813 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7814 * but the ACPI tables just mention level 7. 7815 */ 7816 7817 enum { /* Fan control constants */ 7818 fan_status_offset = 0x2f, /* EC register 0x2f */ 7819 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7820 * 0x84 must be read before 0x85 */ 7821 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7822 bit 0 selects which fan is active */ 7823 7824 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7825 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7826 7827 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7828 }; 7829 7830 enum fan_status_access_mode { 7831 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7832 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7833 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7834 }; 7835 7836 enum fan_control_access_mode { 7837 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7838 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7839 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7840 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7841 }; 7842 7843 enum fan_control_commands { 7844 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7845 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7846 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7847 * and also watchdog cmd */ 7848 }; 7849 7850 static bool fan_control_allowed; 7851 7852 static enum fan_status_access_mode fan_status_access_mode; 7853 static enum fan_control_access_mode fan_control_access_mode; 7854 static enum fan_control_commands fan_control_commands; 7855 7856 static u8 fan_control_initial_status; 7857 static u8 fan_control_desired_level; 7858 static u8 fan_control_resume_level; 7859 static int fan_watchdog_maxinterval; 7860 7861 static struct mutex fan_mutex; 7862 7863 static void fan_watchdog_fire(struct work_struct *ignored); 7864 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7865 7866 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7867 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7868 "\\FSPD", /* 600e/x, 770e, 770x */ 7869 ); /* all others */ 7870 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7871 "JFNS", /* 770x-JL */ 7872 ); /* all others */ 7873 7874 /* 7875 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7876 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7877 * be in auto mode (0x80). 7878 * 7879 * This is corrected by any write to HFSP either by the driver, or 7880 * by the firmware. 7881 * 7882 * We assume 0x07 really means auto mode while this quirk is active, 7883 * as this is far more likely than the ThinkPad being in level 7, 7884 * which is only used by the firmware during thermal emergencies. 7885 * 7886 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7887 * TP-70 (T43, R52), which are known to be buggy. 7888 */ 7889 7890 static void fan_quirk1_setup(void) 7891 { 7892 if (fan_control_initial_status == 0x07) { 7893 pr_notice("fan_init: initial fan status is unknown, " 7894 "assuming it is in auto mode\n"); 7895 tp_features.fan_ctrl_status_undef = 1; 7896 } 7897 } 7898 7899 static void fan_quirk1_handle(u8 *fan_status) 7900 { 7901 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7902 if (*fan_status != fan_control_initial_status) { 7903 /* something changed the HFSP regisnter since 7904 * driver init time, so it is not undefined 7905 * anymore */ 7906 tp_features.fan_ctrl_status_undef = 0; 7907 } else { 7908 /* Return most likely status. In fact, it 7909 * might be the only possible status */ 7910 *fan_status = TP_EC_FAN_AUTO; 7911 } 7912 } 7913 } 7914 7915 /* Select main fan on X60/X61, NOOP on others */ 7916 static bool fan_select_fan1(void) 7917 { 7918 if (tp_features.second_fan) { 7919 u8 val; 7920 7921 if (ec_read(fan_select_offset, &val) < 0) 7922 return false; 7923 val &= 0xFEU; 7924 if (ec_write(fan_select_offset, val) < 0) 7925 return false; 7926 } 7927 return true; 7928 } 7929 7930 /* Select secondary fan on X60/X61 */ 7931 static bool fan_select_fan2(void) 7932 { 7933 u8 val; 7934 7935 if (!tp_features.second_fan) 7936 return false; 7937 7938 if (ec_read(fan_select_offset, &val) < 0) 7939 return false; 7940 val |= 0x01U; 7941 if (ec_write(fan_select_offset, val) < 0) 7942 return false; 7943 7944 return true; 7945 } 7946 7947 /* 7948 * Call with fan_mutex held 7949 */ 7950 static void fan_update_desired_level(u8 status) 7951 { 7952 if ((status & 7953 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7954 if (status > 7) 7955 fan_control_desired_level = 7; 7956 else 7957 fan_control_desired_level = status; 7958 } 7959 } 7960 7961 static int fan_get_status(u8 *status) 7962 { 7963 u8 s; 7964 7965 /* TODO: 7966 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 7967 7968 switch (fan_status_access_mode) { 7969 case TPACPI_FAN_RD_ACPI_GFAN: { 7970 /* 570, 600e/x, 770e, 770x */ 7971 int res; 7972 7973 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 7974 return -EIO; 7975 7976 if (likely(status)) 7977 *status = res & 0x07; 7978 7979 break; 7980 } 7981 case TPACPI_FAN_RD_TPEC: 7982 /* all except 570, 600e/x, 770e, 770x */ 7983 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 7984 return -EIO; 7985 7986 if (likely(status)) { 7987 *status = s; 7988 fan_quirk1_handle(status); 7989 } 7990 7991 break; 7992 7993 default: 7994 return -ENXIO; 7995 } 7996 7997 return 0; 7998 } 7999 8000 static int fan_get_status_safe(u8 *status) 8001 { 8002 int rc; 8003 u8 s; 8004 8005 if (mutex_lock_killable(&fan_mutex)) 8006 return -ERESTARTSYS; 8007 rc = fan_get_status(&s); 8008 if (!rc) 8009 fan_update_desired_level(s); 8010 mutex_unlock(&fan_mutex); 8011 8012 if (rc) 8013 return rc; 8014 if (status) 8015 *status = s; 8016 8017 return 0; 8018 } 8019 8020 static int fan_get_speed(unsigned int *speed) 8021 { 8022 u8 hi, lo; 8023 8024 switch (fan_status_access_mode) { 8025 case TPACPI_FAN_RD_TPEC: 8026 /* all except 570, 600e/x, 770e, 770x */ 8027 if (unlikely(!fan_select_fan1())) 8028 return -EIO; 8029 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8030 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8031 return -EIO; 8032 8033 if (likely(speed)) 8034 *speed = (hi << 8) | lo; 8035 8036 break; 8037 8038 default: 8039 return -ENXIO; 8040 } 8041 8042 return 0; 8043 } 8044 8045 static int fan2_get_speed(unsigned int *speed) 8046 { 8047 u8 hi, lo; 8048 bool rc; 8049 8050 switch (fan_status_access_mode) { 8051 case TPACPI_FAN_RD_TPEC: 8052 /* all except 570, 600e/x, 770e, 770x */ 8053 if (unlikely(!fan_select_fan2())) 8054 return -EIO; 8055 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8056 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8057 fan_select_fan1(); /* play it safe */ 8058 if (rc) 8059 return -EIO; 8060 8061 if (likely(speed)) 8062 *speed = (hi << 8) | lo; 8063 8064 break; 8065 8066 default: 8067 return -ENXIO; 8068 } 8069 8070 return 0; 8071 } 8072 8073 static int fan_set_level(int level) 8074 { 8075 if (!fan_control_allowed) 8076 return -EPERM; 8077 8078 switch (fan_control_access_mode) { 8079 case TPACPI_FAN_WR_ACPI_SFAN: 8080 if (level >= 0 && level <= 7) { 8081 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8082 return -EIO; 8083 } else 8084 return -EINVAL; 8085 break; 8086 8087 case TPACPI_FAN_WR_ACPI_FANS: 8088 case TPACPI_FAN_WR_TPEC: 8089 if (!(level & TP_EC_FAN_AUTO) && 8090 !(level & TP_EC_FAN_FULLSPEED) && 8091 ((level < 0) || (level > 7))) 8092 return -EINVAL; 8093 8094 /* safety net should the EC not support AUTO 8095 * or FULLSPEED mode bits and just ignore them */ 8096 if (level & TP_EC_FAN_FULLSPEED) 8097 level |= 7; /* safety min speed 7 */ 8098 else if (level & TP_EC_FAN_AUTO) 8099 level |= 4; /* safety min speed 4 */ 8100 8101 if (!acpi_ec_write(fan_status_offset, level)) 8102 return -EIO; 8103 else 8104 tp_features.fan_ctrl_status_undef = 0; 8105 break; 8106 8107 default: 8108 return -ENXIO; 8109 } 8110 8111 vdbg_printk(TPACPI_DBG_FAN, 8112 "fan control: set fan control register to 0x%02x\n", level); 8113 return 0; 8114 } 8115 8116 static int fan_set_level_safe(int level) 8117 { 8118 int rc; 8119 8120 if (!fan_control_allowed) 8121 return -EPERM; 8122 8123 if (mutex_lock_killable(&fan_mutex)) 8124 return -ERESTARTSYS; 8125 8126 if (level == TPACPI_FAN_LAST_LEVEL) 8127 level = fan_control_desired_level; 8128 8129 rc = fan_set_level(level); 8130 if (!rc) 8131 fan_update_desired_level(level); 8132 8133 mutex_unlock(&fan_mutex); 8134 return rc; 8135 } 8136 8137 static int fan_set_enable(void) 8138 { 8139 u8 s; 8140 int rc; 8141 8142 if (!fan_control_allowed) 8143 return -EPERM; 8144 8145 if (mutex_lock_killable(&fan_mutex)) 8146 return -ERESTARTSYS; 8147 8148 switch (fan_control_access_mode) { 8149 case TPACPI_FAN_WR_ACPI_FANS: 8150 case TPACPI_FAN_WR_TPEC: 8151 rc = fan_get_status(&s); 8152 if (rc < 0) 8153 break; 8154 8155 /* Don't go out of emergency fan mode */ 8156 if (s != 7) { 8157 s &= 0x07; 8158 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8159 } 8160 8161 if (!acpi_ec_write(fan_status_offset, s)) 8162 rc = -EIO; 8163 else { 8164 tp_features.fan_ctrl_status_undef = 0; 8165 rc = 0; 8166 } 8167 break; 8168 8169 case TPACPI_FAN_WR_ACPI_SFAN: 8170 rc = fan_get_status(&s); 8171 if (rc < 0) 8172 break; 8173 8174 s &= 0x07; 8175 8176 /* Set fan to at least level 4 */ 8177 s |= 4; 8178 8179 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8180 rc = -EIO; 8181 else 8182 rc = 0; 8183 break; 8184 8185 default: 8186 rc = -ENXIO; 8187 } 8188 8189 mutex_unlock(&fan_mutex); 8190 8191 if (!rc) 8192 vdbg_printk(TPACPI_DBG_FAN, 8193 "fan control: set fan control register to 0x%02x\n", 8194 s); 8195 return rc; 8196 } 8197 8198 static int fan_set_disable(void) 8199 { 8200 int rc; 8201 8202 if (!fan_control_allowed) 8203 return -EPERM; 8204 8205 if (mutex_lock_killable(&fan_mutex)) 8206 return -ERESTARTSYS; 8207 8208 rc = 0; 8209 switch (fan_control_access_mode) { 8210 case TPACPI_FAN_WR_ACPI_FANS: 8211 case TPACPI_FAN_WR_TPEC: 8212 if (!acpi_ec_write(fan_status_offset, 0x00)) 8213 rc = -EIO; 8214 else { 8215 fan_control_desired_level = 0; 8216 tp_features.fan_ctrl_status_undef = 0; 8217 } 8218 break; 8219 8220 case TPACPI_FAN_WR_ACPI_SFAN: 8221 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8222 rc = -EIO; 8223 else 8224 fan_control_desired_level = 0; 8225 break; 8226 8227 default: 8228 rc = -ENXIO; 8229 } 8230 8231 if (!rc) 8232 vdbg_printk(TPACPI_DBG_FAN, 8233 "fan control: set fan control register to 0\n"); 8234 8235 mutex_unlock(&fan_mutex); 8236 return rc; 8237 } 8238 8239 static int fan_set_speed(int speed) 8240 { 8241 int rc; 8242 8243 if (!fan_control_allowed) 8244 return -EPERM; 8245 8246 if (mutex_lock_killable(&fan_mutex)) 8247 return -ERESTARTSYS; 8248 8249 rc = 0; 8250 switch (fan_control_access_mode) { 8251 case TPACPI_FAN_WR_ACPI_FANS: 8252 if (speed >= 0 && speed <= 65535) { 8253 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8254 speed, speed, speed)) 8255 rc = -EIO; 8256 } else 8257 rc = -EINVAL; 8258 break; 8259 8260 default: 8261 rc = -ENXIO; 8262 } 8263 8264 mutex_unlock(&fan_mutex); 8265 return rc; 8266 } 8267 8268 static void fan_watchdog_reset(void) 8269 { 8270 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8271 return; 8272 8273 if (fan_watchdog_maxinterval > 0 && 8274 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8275 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8276 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8277 else 8278 cancel_delayed_work(&fan_watchdog_task); 8279 } 8280 8281 static void fan_watchdog_fire(struct work_struct *ignored) 8282 { 8283 int rc; 8284 8285 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8286 return; 8287 8288 pr_notice("fan watchdog: enabling fan\n"); 8289 rc = fan_set_enable(); 8290 if (rc < 0) { 8291 pr_err("fan watchdog: error %d while enabling fan, " 8292 "will try again later...\n", -rc); 8293 /* reschedule for later */ 8294 fan_watchdog_reset(); 8295 } 8296 } 8297 8298 /* 8299 * SYSFS fan layout: hwmon compatible (device) 8300 * 8301 * pwm*_enable: 8302 * 0: "disengaged" mode 8303 * 1: manual mode 8304 * 2: native EC "auto" mode (recommended, hardware default) 8305 * 8306 * pwm*: set speed in manual mode, ignored otherwise. 8307 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8308 * interpolation. 8309 * 8310 * fan*_input: tachometer reading, RPM 8311 * 8312 * 8313 * SYSFS fan layout: extensions 8314 * 8315 * fan_watchdog (driver): 8316 * fan watchdog interval in seconds, 0 disables (default), max 120 8317 */ 8318 8319 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8320 static ssize_t fan_pwm1_enable_show(struct device *dev, 8321 struct device_attribute *attr, 8322 char *buf) 8323 { 8324 int res, mode; 8325 u8 status; 8326 8327 res = fan_get_status_safe(&status); 8328 if (res) 8329 return res; 8330 8331 if (status & TP_EC_FAN_FULLSPEED) { 8332 mode = 0; 8333 } else if (status & TP_EC_FAN_AUTO) { 8334 mode = 2; 8335 } else 8336 mode = 1; 8337 8338 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8339 } 8340 8341 static ssize_t fan_pwm1_enable_store(struct device *dev, 8342 struct device_attribute *attr, 8343 const char *buf, size_t count) 8344 { 8345 unsigned long t; 8346 int res, level; 8347 8348 if (parse_strtoul(buf, 2, &t)) 8349 return -EINVAL; 8350 8351 tpacpi_disclose_usertask("hwmon pwm1_enable", 8352 "set fan mode to %lu\n", t); 8353 8354 switch (t) { 8355 case 0: 8356 level = TP_EC_FAN_FULLSPEED; 8357 break; 8358 case 1: 8359 level = TPACPI_FAN_LAST_LEVEL; 8360 break; 8361 case 2: 8362 level = TP_EC_FAN_AUTO; 8363 break; 8364 case 3: 8365 /* reserved for software-controlled auto mode */ 8366 return -ENOSYS; 8367 default: 8368 return -EINVAL; 8369 } 8370 8371 res = fan_set_level_safe(level); 8372 if (res == -ENXIO) 8373 return -EINVAL; 8374 else if (res < 0) 8375 return res; 8376 8377 fan_watchdog_reset(); 8378 8379 return count; 8380 } 8381 8382 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8383 fan_pwm1_enable_show, fan_pwm1_enable_store); 8384 8385 /* sysfs fan pwm1 ------------------------------------------------------ */ 8386 static ssize_t fan_pwm1_show(struct device *dev, 8387 struct device_attribute *attr, 8388 char *buf) 8389 { 8390 int res; 8391 u8 status; 8392 8393 res = fan_get_status_safe(&status); 8394 if (res) 8395 return res; 8396 8397 if ((status & 8398 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8399 status = fan_control_desired_level; 8400 8401 if (status > 7) 8402 status = 7; 8403 8404 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8405 } 8406 8407 static ssize_t fan_pwm1_store(struct device *dev, 8408 struct device_attribute *attr, 8409 const char *buf, size_t count) 8410 { 8411 unsigned long s; 8412 int rc; 8413 u8 status, newlevel; 8414 8415 if (parse_strtoul(buf, 255, &s)) 8416 return -EINVAL; 8417 8418 tpacpi_disclose_usertask("hwmon pwm1", 8419 "set fan speed to %lu\n", s); 8420 8421 /* scale down from 0-255 to 0-7 */ 8422 newlevel = (s >> 5) & 0x07; 8423 8424 if (mutex_lock_killable(&fan_mutex)) 8425 return -ERESTARTSYS; 8426 8427 rc = fan_get_status(&status); 8428 if (!rc && (status & 8429 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8430 rc = fan_set_level(newlevel); 8431 if (rc == -ENXIO) 8432 rc = -EINVAL; 8433 else if (!rc) { 8434 fan_update_desired_level(newlevel); 8435 fan_watchdog_reset(); 8436 } 8437 } 8438 8439 mutex_unlock(&fan_mutex); 8440 return (rc) ? rc : count; 8441 } 8442 8443 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8444 8445 /* sysfs fan fan1_input ------------------------------------------------ */ 8446 static ssize_t fan_fan1_input_show(struct device *dev, 8447 struct device_attribute *attr, 8448 char *buf) 8449 { 8450 int res; 8451 unsigned int speed; 8452 8453 res = fan_get_speed(&speed); 8454 if (res < 0) 8455 return res; 8456 8457 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8458 } 8459 8460 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8461 8462 /* sysfs fan fan2_input ------------------------------------------------ */ 8463 static ssize_t fan_fan2_input_show(struct device *dev, 8464 struct device_attribute *attr, 8465 char *buf) 8466 { 8467 int res; 8468 unsigned int speed; 8469 8470 res = fan2_get_speed(&speed); 8471 if (res < 0) 8472 return res; 8473 8474 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8475 } 8476 8477 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8478 8479 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8480 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 8481 char *buf) 8482 { 8483 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8484 } 8485 8486 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 8487 const char *buf, size_t count) 8488 { 8489 unsigned long t; 8490 8491 if (parse_strtoul(buf, 120, &t)) 8492 return -EINVAL; 8493 8494 if (!fan_control_allowed) 8495 return -EPERM; 8496 8497 fan_watchdog_maxinterval = t; 8498 fan_watchdog_reset(); 8499 8500 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8501 8502 return count; 8503 } 8504 8505 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 8506 fan_fan_watchdog_show, fan_fan_watchdog_store); 8507 8508 /* --------------------------------------------------------------------- */ 8509 static struct attribute *fan_attributes[] = { 8510 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8511 &dev_attr_fan1_input.attr, 8512 NULL, /* for fan2_input */ 8513 NULL 8514 }; 8515 8516 static const struct attribute_group fan_attr_group = { 8517 .attrs = fan_attributes, 8518 }; 8519 8520 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8521 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8522 8523 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 8524 { .vendor = PCI_VENDOR_ID_IBM, \ 8525 .bios = TPACPI_MATCH_ANY, \ 8526 .ec = TPID(__id1, __id2), \ 8527 .quirks = __quirks } 8528 8529 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 8530 { .vendor = PCI_VENDOR_ID_LENOVO, \ 8531 .bios = TPACPI_MATCH_ANY, \ 8532 .ec = TPID(__id1, __id2), \ 8533 .quirks = __quirks } 8534 8535 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8536 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 8537 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 8538 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 8539 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 8540 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 8541 }; 8542 8543 #undef TPACPI_FAN_QL 8544 #undef TPACPI_FAN_QI 8545 8546 static int __init fan_init(struct ibm_init_struct *iibm) 8547 { 8548 int rc; 8549 unsigned long quirks; 8550 8551 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8552 "initializing fan subdriver\n"); 8553 8554 mutex_init(&fan_mutex); 8555 fan_status_access_mode = TPACPI_FAN_NONE; 8556 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8557 fan_control_commands = 0; 8558 fan_watchdog_maxinterval = 0; 8559 tp_features.fan_ctrl_status_undef = 0; 8560 tp_features.second_fan = 0; 8561 fan_control_desired_level = 7; 8562 8563 if (tpacpi_is_ibm()) { 8564 TPACPI_ACPIHANDLE_INIT(fans); 8565 TPACPI_ACPIHANDLE_INIT(gfan); 8566 TPACPI_ACPIHANDLE_INIT(sfan); 8567 } 8568 8569 quirks = tpacpi_check_quirks(fan_quirk_table, 8570 ARRAY_SIZE(fan_quirk_table)); 8571 8572 if (gfan_handle) { 8573 /* 570, 600e/x, 770e, 770x */ 8574 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8575 } else { 8576 /* all other ThinkPads: note that even old-style 8577 * ThinkPad ECs supports the fan control register */ 8578 if (likely(acpi_ec_read(fan_status_offset, 8579 &fan_control_initial_status))) { 8580 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8581 if (quirks & TPACPI_FAN_Q1) 8582 fan_quirk1_setup(); 8583 if (quirks & TPACPI_FAN_2FAN) { 8584 tp_features.second_fan = 1; 8585 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8586 "secondary fan support enabled\n"); 8587 } 8588 } else { 8589 pr_err("ThinkPad ACPI EC access misbehaving, " 8590 "fan status and control unavailable\n"); 8591 return 1; 8592 } 8593 } 8594 8595 if (sfan_handle) { 8596 /* 570, 770x-JL */ 8597 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8598 fan_control_commands |= 8599 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8600 } else { 8601 if (!gfan_handle) { 8602 /* gfan without sfan means no fan control */ 8603 /* all other models implement TP EC 0x2f control */ 8604 8605 if (fans_handle) { 8606 /* X31, X40, X41 */ 8607 fan_control_access_mode = 8608 TPACPI_FAN_WR_ACPI_FANS; 8609 fan_control_commands |= 8610 TPACPI_FAN_CMD_SPEED | 8611 TPACPI_FAN_CMD_LEVEL | 8612 TPACPI_FAN_CMD_ENABLE; 8613 } else { 8614 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8615 fan_control_commands |= 8616 TPACPI_FAN_CMD_LEVEL | 8617 TPACPI_FAN_CMD_ENABLE; 8618 } 8619 } 8620 } 8621 8622 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8623 "fan is %s, modes %d, %d\n", 8624 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8625 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8626 fan_status_access_mode, fan_control_access_mode); 8627 8628 /* fan control master switch */ 8629 if (!fan_control_allowed) { 8630 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8631 fan_control_commands = 0; 8632 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8633 "fan control features disabled by parameter\n"); 8634 } 8635 8636 /* update fan_control_desired_level */ 8637 if (fan_status_access_mode != TPACPI_FAN_NONE) 8638 fan_get_status_safe(NULL); 8639 8640 if (fan_status_access_mode != TPACPI_FAN_NONE || 8641 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8642 if (tp_features.second_fan) { 8643 /* attach second fan tachometer */ 8644 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8645 &dev_attr_fan2_input.attr; 8646 } 8647 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8648 &fan_attr_group); 8649 if (rc < 0) 8650 return rc; 8651 8652 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8653 &driver_attr_fan_watchdog); 8654 if (rc < 0) { 8655 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8656 &fan_attr_group); 8657 return rc; 8658 } 8659 return 0; 8660 } else 8661 return 1; 8662 } 8663 8664 static void fan_exit(void) 8665 { 8666 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8667 "cancelling any pending fan watchdog tasks\n"); 8668 8669 /* FIXME: can we really do this unconditionally? */ 8670 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8671 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8672 &driver_attr_fan_watchdog); 8673 8674 cancel_delayed_work(&fan_watchdog_task); 8675 flush_workqueue(tpacpi_wq); 8676 } 8677 8678 static void fan_suspend(void) 8679 { 8680 int rc; 8681 8682 if (!fan_control_allowed) 8683 return; 8684 8685 /* Store fan status in cache */ 8686 fan_control_resume_level = 0; 8687 rc = fan_get_status_safe(&fan_control_resume_level); 8688 if (rc < 0) 8689 pr_notice("failed to read fan level for later " 8690 "restore during resume: %d\n", rc); 8691 8692 /* if it is undefined, don't attempt to restore it. 8693 * KEEP THIS LAST */ 8694 if (tp_features.fan_ctrl_status_undef) 8695 fan_control_resume_level = 0; 8696 } 8697 8698 static void fan_resume(void) 8699 { 8700 u8 current_level = 7; 8701 bool do_set = false; 8702 int rc; 8703 8704 /* DSDT *always* updates status on resume */ 8705 tp_features.fan_ctrl_status_undef = 0; 8706 8707 if (!fan_control_allowed || 8708 !fan_control_resume_level || 8709 (fan_get_status_safe(¤t_level) < 0)) 8710 return; 8711 8712 switch (fan_control_access_mode) { 8713 case TPACPI_FAN_WR_ACPI_SFAN: 8714 /* never decrease fan level */ 8715 do_set = (fan_control_resume_level > current_level); 8716 break; 8717 case TPACPI_FAN_WR_ACPI_FANS: 8718 case TPACPI_FAN_WR_TPEC: 8719 /* never decrease fan level, scale is: 8720 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8721 * 8722 * We expect the firmware to set either 7 or AUTO, but we 8723 * handle FULLSPEED out of paranoia. 8724 * 8725 * So, we can safely only restore FULLSPEED or 7, anything 8726 * else could slow the fan. Restoring AUTO is useless, at 8727 * best that's exactly what the DSDT already set (it is the 8728 * slower it uses). 8729 * 8730 * Always keep in mind that the DSDT *will* have set the 8731 * fans to what the vendor supposes is the best level. We 8732 * muck with it only to speed the fan up. 8733 */ 8734 if (fan_control_resume_level != 7 && 8735 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8736 return; 8737 else 8738 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8739 (current_level != fan_control_resume_level); 8740 break; 8741 default: 8742 return; 8743 } 8744 if (do_set) { 8745 pr_notice("restoring fan level to 0x%02x\n", 8746 fan_control_resume_level); 8747 rc = fan_set_level_safe(fan_control_resume_level); 8748 if (rc < 0) 8749 pr_notice("failed to restore fan level: %d\n", rc); 8750 } 8751 } 8752 8753 static int fan_read(struct seq_file *m) 8754 { 8755 int rc; 8756 u8 status; 8757 unsigned int speed = 0; 8758 8759 switch (fan_status_access_mode) { 8760 case TPACPI_FAN_RD_ACPI_GFAN: 8761 /* 570, 600e/x, 770e, 770x */ 8762 rc = fan_get_status_safe(&status); 8763 if (rc < 0) 8764 return rc; 8765 8766 seq_printf(m, "status:\t\t%s\n" 8767 "level:\t\t%d\n", 8768 (status != 0) ? "enabled" : "disabled", status); 8769 break; 8770 8771 case TPACPI_FAN_RD_TPEC: 8772 /* all except 570, 600e/x, 770e, 770x */ 8773 rc = fan_get_status_safe(&status); 8774 if (rc < 0) 8775 return rc; 8776 8777 seq_printf(m, "status:\t\t%s\n", 8778 (status != 0) ? "enabled" : "disabled"); 8779 8780 rc = fan_get_speed(&speed); 8781 if (rc < 0) 8782 return rc; 8783 8784 seq_printf(m, "speed:\t\t%d\n", speed); 8785 8786 if (status & TP_EC_FAN_FULLSPEED) 8787 /* Disengaged mode takes precedence */ 8788 seq_printf(m, "level:\t\tdisengaged\n"); 8789 else if (status & TP_EC_FAN_AUTO) 8790 seq_printf(m, "level:\t\tauto\n"); 8791 else 8792 seq_printf(m, "level:\t\t%d\n", status); 8793 break; 8794 8795 case TPACPI_FAN_NONE: 8796 default: 8797 seq_printf(m, "status:\t\tnot supported\n"); 8798 } 8799 8800 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8801 seq_printf(m, "commands:\tlevel <level>"); 8802 8803 switch (fan_control_access_mode) { 8804 case TPACPI_FAN_WR_ACPI_SFAN: 8805 seq_printf(m, " (<level> is 0-7)\n"); 8806 break; 8807 8808 default: 8809 seq_printf(m, " (<level> is 0-7, " 8810 "auto, disengaged, full-speed)\n"); 8811 break; 8812 } 8813 } 8814 8815 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8816 seq_printf(m, "commands:\tenable, disable\n" 8817 "commands:\twatchdog <timeout> (<timeout> " 8818 "is 0 (off), 1-120 (seconds))\n"); 8819 8820 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8821 seq_printf(m, "commands:\tspeed <speed>" 8822 " (<speed> is 0-65535)\n"); 8823 8824 return 0; 8825 } 8826 8827 static int fan_write_cmd_level(const char *cmd, int *rc) 8828 { 8829 int level; 8830 8831 if (strlencmp(cmd, "level auto") == 0) 8832 level = TP_EC_FAN_AUTO; 8833 else if ((strlencmp(cmd, "level disengaged") == 0) | 8834 (strlencmp(cmd, "level full-speed") == 0)) 8835 level = TP_EC_FAN_FULLSPEED; 8836 else if (sscanf(cmd, "level %d", &level) != 1) 8837 return 0; 8838 8839 *rc = fan_set_level_safe(level); 8840 if (*rc == -ENXIO) 8841 pr_err("level command accepted for unsupported access mode %d\n", 8842 fan_control_access_mode); 8843 else if (!*rc) 8844 tpacpi_disclose_usertask("procfs fan", 8845 "set level to %d\n", level); 8846 8847 return 1; 8848 } 8849 8850 static int fan_write_cmd_enable(const char *cmd, int *rc) 8851 { 8852 if (strlencmp(cmd, "enable") != 0) 8853 return 0; 8854 8855 *rc = fan_set_enable(); 8856 if (*rc == -ENXIO) 8857 pr_err("enable command accepted for unsupported access mode %d\n", 8858 fan_control_access_mode); 8859 else if (!*rc) 8860 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8861 8862 return 1; 8863 } 8864 8865 static int fan_write_cmd_disable(const char *cmd, int *rc) 8866 { 8867 if (strlencmp(cmd, "disable") != 0) 8868 return 0; 8869 8870 *rc = fan_set_disable(); 8871 if (*rc == -ENXIO) 8872 pr_err("disable command accepted for unsupported access mode %d\n", 8873 fan_control_access_mode); 8874 else if (!*rc) 8875 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8876 8877 return 1; 8878 } 8879 8880 static int fan_write_cmd_speed(const char *cmd, int *rc) 8881 { 8882 int speed; 8883 8884 /* TODO: 8885 * Support speed <low> <medium> <high> ? */ 8886 8887 if (sscanf(cmd, "speed %d", &speed) != 1) 8888 return 0; 8889 8890 *rc = fan_set_speed(speed); 8891 if (*rc == -ENXIO) 8892 pr_err("speed command accepted for unsupported access mode %d\n", 8893 fan_control_access_mode); 8894 else if (!*rc) 8895 tpacpi_disclose_usertask("procfs fan", 8896 "set speed to %d\n", speed); 8897 8898 return 1; 8899 } 8900 8901 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8902 { 8903 int interval; 8904 8905 if (sscanf(cmd, "watchdog %d", &interval) != 1) 8906 return 0; 8907 8908 if (interval < 0 || interval > 120) 8909 *rc = -EINVAL; 8910 else { 8911 fan_watchdog_maxinterval = interval; 8912 tpacpi_disclose_usertask("procfs fan", 8913 "set watchdog timer to %d\n", 8914 interval); 8915 } 8916 8917 return 1; 8918 } 8919 8920 static int fan_write(char *buf) 8921 { 8922 char *cmd; 8923 int rc = 0; 8924 8925 while (!rc && (cmd = next_cmd(&buf))) { 8926 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 8927 fan_write_cmd_level(cmd, &rc)) && 8928 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 8929 (fan_write_cmd_enable(cmd, &rc) || 8930 fan_write_cmd_disable(cmd, &rc) || 8931 fan_write_cmd_watchdog(cmd, &rc))) && 8932 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 8933 fan_write_cmd_speed(cmd, &rc)) 8934 ) 8935 rc = -EINVAL; 8936 else if (!rc) 8937 fan_watchdog_reset(); 8938 } 8939 8940 return rc; 8941 } 8942 8943 static struct ibm_struct fan_driver_data = { 8944 .name = "fan", 8945 .read = fan_read, 8946 .write = fan_write, 8947 .exit = fan_exit, 8948 .suspend = fan_suspend, 8949 .resume = fan_resume, 8950 }; 8951 8952 /************************************************************************* 8953 * Mute LED subdriver 8954 */ 8955 8956 8957 struct tp_led_table { 8958 acpi_string name; 8959 int on_value; 8960 int off_value; 8961 int state; 8962 }; 8963 8964 static struct tp_led_table led_tables[] = { 8965 [TPACPI_LED_MUTE] = { 8966 .name = "SSMS", 8967 .on_value = 1, 8968 .off_value = 0, 8969 }, 8970 [TPACPI_LED_MICMUTE] = { 8971 .name = "MMTS", 8972 .on_value = 2, 8973 .off_value = 0, 8974 }, 8975 }; 8976 8977 static int mute_led_on_off(struct tp_led_table *t, bool state) 8978 { 8979 acpi_handle temp; 8980 int output; 8981 8982 if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) { 8983 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 8984 return -EIO; 8985 } 8986 8987 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 8988 state ? t->on_value : t->off_value)) 8989 return -EIO; 8990 8991 t->state = state; 8992 return state; 8993 } 8994 8995 int tpacpi_led_set(int whichled, bool on) 8996 { 8997 struct tp_led_table *t; 8998 8999 if (whichled < 0 || whichled >= TPACPI_LED_MAX) 9000 return -EINVAL; 9001 9002 t = &led_tables[whichled]; 9003 if (t->state < 0 || t->state == on) 9004 return t->state; 9005 return mute_led_on_off(t, on); 9006 } 9007 EXPORT_SYMBOL_GPL(tpacpi_led_set); 9008 9009 static int mute_led_init(struct ibm_init_struct *iibm) 9010 { 9011 acpi_handle temp; 9012 int i; 9013 9014 for (i = 0; i < TPACPI_LED_MAX; i++) { 9015 struct tp_led_table *t = &led_tables[i]; 9016 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) 9017 mute_led_on_off(t, false); 9018 else 9019 t->state = -ENODEV; 9020 } 9021 return 0; 9022 } 9023 9024 static void mute_led_exit(void) 9025 { 9026 int i; 9027 9028 for (i = 0; i < TPACPI_LED_MAX; i++) 9029 tpacpi_led_set(i, false); 9030 } 9031 9032 static void mute_led_resume(void) 9033 { 9034 int i; 9035 9036 for (i = 0; i < TPACPI_LED_MAX; i++) { 9037 struct tp_led_table *t = &led_tables[i]; 9038 if (t->state >= 0) 9039 mute_led_on_off(t, t->state); 9040 } 9041 } 9042 9043 static struct ibm_struct mute_led_driver_data = { 9044 .name = "mute_led", 9045 .exit = mute_led_exit, 9046 .resume = mute_led_resume, 9047 }; 9048 9049 /**************************************************************************** 9050 **************************************************************************** 9051 * 9052 * Infrastructure 9053 * 9054 **************************************************************************** 9055 ****************************************************************************/ 9056 9057 /* 9058 * HKEY event callout for other subdrivers go here 9059 * (yes, it is ugly, but it is quick, safe, and gets the job done 9060 */ 9061 static void tpacpi_driver_event(const unsigned int hkey_event) 9062 { 9063 if (ibm_backlight_device) { 9064 switch (hkey_event) { 9065 case TP_HKEY_EV_BRGHT_UP: 9066 case TP_HKEY_EV_BRGHT_DOWN: 9067 tpacpi_brightness_notify_change(); 9068 } 9069 } 9070 if (alsa_card) { 9071 switch (hkey_event) { 9072 case TP_HKEY_EV_VOL_UP: 9073 case TP_HKEY_EV_VOL_DOWN: 9074 case TP_HKEY_EV_VOL_MUTE: 9075 volume_alsa_notify_change(); 9076 } 9077 } 9078 } 9079 9080 static void hotkey_driver_event(const unsigned int scancode) 9081 { 9082 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9083 } 9084 9085 /* sysfs name ---------------------------------------------------------- */ 9086 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 9087 struct device_attribute *attr, 9088 char *buf) 9089 { 9090 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 9091 } 9092 9093 static DEVICE_ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 9094 9095 /* --------------------------------------------------------------------- */ 9096 9097 /* /proc support */ 9098 static struct proc_dir_entry *proc_dir; 9099 9100 /* 9101 * Module and infrastructure proble, init and exit handling 9102 */ 9103 9104 static bool force_load; 9105 9106 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9107 static const char * __init str_supported(int is_supported) 9108 { 9109 static char text_unsupported[] __initdata = "not supported"; 9110 9111 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9112 } 9113 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9114 9115 static void ibm_exit(struct ibm_struct *ibm) 9116 { 9117 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9118 9119 list_del_init(&ibm->all_drivers); 9120 9121 if (ibm->flags.acpi_notify_installed) { 9122 dbg_printk(TPACPI_DBG_EXIT, 9123 "%s: acpi_remove_notify_handler\n", ibm->name); 9124 BUG_ON(!ibm->acpi); 9125 acpi_remove_notify_handler(*ibm->acpi->handle, 9126 ibm->acpi->type, 9127 dispatch_acpi_notify); 9128 ibm->flags.acpi_notify_installed = 0; 9129 } 9130 9131 if (ibm->flags.proc_created) { 9132 dbg_printk(TPACPI_DBG_EXIT, 9133 "%s: remove_proc_entry\n", ibm->name); 9134 remove_proc_entry(ibm->name, proc_dir); 9135 ibm->flags.proc_created = 0; 9136 } 9137 9138 if (ibm->flags.acpi_driver_registered) { 9139 dbg_printk(TPACPI_DBG_EXIT, 9140 "%s: acpi_bus_unregister_driver\n", ibm->name); 9141 BUG_ON(!ibm->acpi); 9142 acpi_bus_unregister_driver(ibm->acpi->driver); 9143 kfree(ibm->acpi->driver); 9144 ibm->acpi->driver = NULL; 9145 ibm->flags.acpi_driver_registered = 0; 9146 } 9147 9148 if (ibm->flags.init_called && ibm->exit) { 9149 ibm->exit(); 9150 ibm->flags.init_called = 0; 9151 } 9152 9153 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9154 } 9155 9156 static int __init ibm_init(struct ibm_init_struct *iibm) 9157 { 9158 int ret; 9159 struct ibm_struct *ibm = iibm->data; 9160 struct proc_dir_entry *entry; 9161 9162 BUG_ON(ibm == NULL); 9163 9164 INIT_LIST_HEAD(&ibm->all_drivers); 9165 9166 if (ibm->flags.experimental && !experimental) 9167 return 0; 9168 9169 dbg_printk(TPACPI_DBG_INIT, 9170 "probing for %s\n", ibm->name); 9171 9172 if (iibm->init) { 9173 ret = iibm->init(iibm); 9174 if (ret > 0) 9175 return 0; /* probe failed */ 9176 if (ret) 9177 return ret; 9178 9179 ibm->flags.init_called = 1; 9180 } 9181 9182 if (ibm->acpi) { 9183 if (ibm->acpi->hid) { 9184 ret = register_tpacpi_subdriver(ibm); 9185 if (ret) 9186 goto err_out; 9187 } 9188 9189 if (ibm->acpi->notify) { 9190 ret = setup_acpi_notify(ibm); 9191 if (ret == -ENODEV) { 9192 pr_notice("disabling subdriver %s\n", 9193 ibm->name); 9194 ret = 0; 9195 goto err_out; 9196 } 9197 if (ret < 0) 9198 goto err_out; 9199 } 9200 } 9201 9202 dbg_printk(TPACPI_DBG_INIT, 9203 "%s installed\n", ibm->name); 9204 9205 if (ibm->read) { 9206 umode_t mode = iibm->base_procfs_mode; 9207 9208 if (!mode) 9209 mode = S_IRUGO; 9210 if (ibm->write) 9211 mode |= S_IWUSR; 9212 entry = proc_create_data(ibm->name, mode, proc_dir, 9213 &dispatch_proc_fops, ibm); 9214 if (!entry) { 9215 pr_err("unable to create proc entry %s\n", ibm->name); 9216 ret = -ENODEV; 9217 goto err_out; 9218 } 9219 ibm->flags.proc_created = 1; 9220 } 9221 9222 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9223 9224 return 0; 9225 9226 err_out: 9227 dbg_printk(TPACPI_DBG_INIT, 9228 "%s: at error exit path with result %d\n", 9229 ibm->name, ret); 9230 9231 ibm_exit(ibm); 9232 return (ret < 0) ? ret : 0; 9233 } 9234 9235 /* Probing */ 9236 9237 static bool __pure __init tpacpi_is_fw_digit(const char c) 9238 { 9239 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 9240 } 9241 9242 static bool __pure __init tpacpi_is_valid_fw_id(const char * const s, 9243 const char t) 9244 { 9245 /* 9246 * Most models: xxyTkkWW (#.##c) 9247 * Ancient 570/600 and -SL lacks (#.##c) 9248 */ 9249 if (s && strlen(s) >= 8 && 9250 tpacpi_is_fw_digit(s[0]) && 9251 tpacpi_is_fw_digit(s[1]) && 9252 s[2] == t && 9253 (s[3] == 'T' || s[3] == 'N') && 9254 tpacpi_is_fw_digit(s[4]) && 9255 tpacpi_is_fw_digit(s[5])) 9256 return true; 9257 9258 /* New models: xxxyTkkW (#.##c); T550 and some others */ 9259 return s && strlen(s) >= 8 && 9260 tpacpi_is_fw_digit(s[0]) && 9261 tpacpi_is_fw_digit(s[1]) && 9262 tpacpi_is_fw_digit(s[2]) && 9263 s[3] == t && 9264 (s[4] == 'T' || s[4] == 'N') && 9265 tpacpi_is_fw_digit(s[5]) && 9266 tpacpi_is_fw_digit(s[6]); 9267 } 9268 9269 /* returns 0 - probe ok, or < 0 - probe error. 9270 * Probe ok doesn't mean thinkpad found. 9271 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 9272 static int __must_check __init get_thinkpad_model_data( 9273 struct thinkpad_id_data *tp) 9274 { 9275 const struct dmi_device *dev = NULL; 9276 char ec_fw_string[18]; 9277 char const *s; 9278 9279 if (!tp) 9280 return -EINVAL; 9281 9282 memset(tp, 0, sizeof(*tp)); 9283 9284 if (dmi_name_in_vendors("IBM")) 9285 tp->vendor = PCI_VENDOR_ID_IBM; 9286 else if (dmi_name_in_vendors("LENOVO")) 9287 tp->vendor = PCI_VENDOR_ID_LENOVO; 9288 else 9289 return 0; 9290 9291 s = dmi_get_system_info(DMI_BIOS_VERSION); 9292 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 9293 if (s && !tp->bios_version_str) 9294 return -ENOMEM; 9295 9296 /* Really ancient ThinkPad 240X will fail this, which is fine */ 9297 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') || 9298 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C'))) 9299 return 0; 9300 9301 tp->bios_model = tp->bios_version_str[0] 9302 | (tp->bios_version_str[1] << 8); 9303 tp->bios_release = (tp->bios_version_str[4] << 8) 9304 | tp->bios_version_str[5]; 9305 9306 /* 9307 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 9308 * X32 or newer, all Z series; Some models must have an 9309 * up-to-date BIOS or they will not be detected. 9310 * 9311 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9312 */ 9313 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 9314 if (sscanf(dev->name, 9315 "IBM ThinkPad Embedded Controller -[%17c", 9316 ec_fw_string) == 1) { 9317 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 9318 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 9319 9320 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 9321 if (!tp->ec_version_str) 9322 return -ENOMEM; 9323 9324 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 9325 tp->ec_model = ec_fw_string[0] 9326 | (ec_fw_string[1] << 8); 9327 tp->ec_release = (ec_fw_string[4] << 8) 9328 | ec_fw_string[5]; 9329 } else { 9330 pr_notice("ThinkPad firmware release %s " 9331 "doesn't match the known patterns\n", 9332 ec_fw_string); 9333 pr_notice("please report this to %s\n", 9334 TPACPI_MAIL); 9335 } 9336 break; 9337 } 9338 } 9339 9340 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 9341 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 9342 tp->model_str = kstrdup(s, GFP_KERNEL); 9343 if (!tp->model_str) 9344 return -ENOMEM; 9345 } else { 9346 s = dmi_get_system_info(DMI_BIOS_VENDOR); 9347 if (s && !(strncasecmp(s, "Lenovo", 6))) { 9348 tp->model_str = kstrdup(s, GFP_KERNEL); 9349 if (!tp->model_str) 9350 return -ENOMEM; 9351 } 9352 } 9353 9354 s = dmi_get_system_info(DMI_PRODUCT_NAME); 9355 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 9356 if (s && !tp->nummodel_str) 9357 return -ENOMEM; 9358 9359 return 0; 9360 } 9361 9362 static int __init probe_for_thinkpad(void) 9363 { 9364 int is_thinkpad; 9365 9366 if (acpi_disabled) 9367 return -ENODEV; 9368 9369 /* It would be dangerous to run the driver in this case */ 9370 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 9371 return -ENODEV; 9372 9373 /* 9374 * Non-ancient models have better DMI tagging, but very old models 9375 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 9376 */ 9377 is_thinkpad = (thinkpad_id.model_str != NULL) || 9378 (thinkpad_id.ec_model != 0) || 9379 tpacpi_is_fw_known(); 9380 9381 /* The EC handler is required */ 9382 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 9383 if (!ec_handle) { 9384 if (is_thinkpad) 9385 pr_err("Not yet supported ThinkPad detected!\n"); 9386 return -ENODEV; 9387 } 9388 9389 if (!is_thinkpad && !force_load) 9390 return -ENODEV; 9391 9392 return 0; 9393 } 9394 9395 static void __init thinkpad_acpi_init_banner(void) 9396 { 9397 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 9398 pr_info("%s\n", TPACPI_URL); 9399 9400 pr_info("ThinkPad BIOS %s, EC %s\n", 9401 (thinkpad_id.bios_version_str) ? 9402 thinkpad_id.bios_version_str : "unknown", 9403 (thinkpad_id.ec_version_str) ? 9404 thinkpad_id.ec_version_str : "unknown"); 9405 9406 BUG_ON(!thinkpad_id.vendor); 9407 9408 if (thinkpad_id.model_str) 9409 pr_info("%s %s, model %s\n", 9410 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 9411 "IBM" : ((thinkpad_id.vendor == 9412 PCI_VENDOR_ID_LENOVO) ? 9413 "Lenovo" : "Unknown vendor"), 9414 thinkpad_id.model_str, 9415 (thinkpad_id.nummodel_str) ? 9416 thinkpad_id.nummodel_str : "unknown"); 9417 } 9418 9419 /* Module init, exit, parameters */ 9420 9421 static struct ibm_init_struct ibms_init[] __initdata = { 9422 { 9423 .data = &thinkpad_acpi_driver_data, 9424 }, 9425 { 9426 .init = hotkey_init, 9427 .data = &hotkey_driver_data, 9428 }, 9429 { 9430 .init = bluetooth_init, 9431 .data = &bluetooth_driver_data, 9432 }, 9433 { 9434 .init = wan_init, 9435 .data = &wan_driver_data, 9436 }, 9437 { 9438 .init = uwb_init, 9439 .data = &uwb_driver_data, 9440 }, 9441 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 9442 { 9443 .init = video_init, 9444 .base_procfs_mode = S_IRUSR, 9445 .data = &video_driver_data, 9446 }, 9447 #endif 9448 { 9449 .init = kbdlight_init, 9450 .data = &kbdlight_driver_data, 9451 }, 9452 { 9453 .init = light_init, 9454 .data = &light_driver_data, 9455 }, 9456 { 9457 .init = cmos_init, 9458 .data = &cmos_driver_data, 9459 }, 9460 { 9461 .init = led_init, 9462 .data = &led_driver_data, 9463 }, 9464 { 9465 .init = beep_init, 9466 .data = &beep_driver_data, 9467 }, 9468 { 9469 .init = thermal_init, 9470 .data = &thermal_driver_data, 9471 }, 9472 { 9473 .init = brightness_init, 9474 .data = &brightness_driver_data, 9475 }, 9476 { 9477 .init = volume_init, 9478 .data = &volume_driver_data, 9479 }, 9480 { 9481 .init = fan_init, 9482 .data = &fan_driver_data, 9483 }, 9484 { 9485 .init = mute_led_init, 9486 .data = &mute_led_driver_data, 9487 }, 9488 }; 9489 9490 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 9491 { 9492 unsigned int i; 9493 struct ibm_struct *ibm; 9494 9495 if (!kp || !kp->name || !val) 9496 return -EINVAL; 9497 9498 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9499 ibm = ibms_init[i].data; 9500 WARN_ON(ibm == NULL); 9501 9502 if (!ibm || !ibm->name) 9503 continue; 9504 9505 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 9506 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 9507 return -ENOSPC; 9508 strcpy(ibms_init[i].param, val); 9509 strcat(ibms_init[i].param, ","); 9510 return 0; 9511 } 9512 } 9513 9514 return -EINVAL; 9515 } 9516 9517 module_param(experimental, int, 0444); 9518 MODULE_PARM_DESC(experimental, 9519 "Enables experimental features when non-zero"); 9520 9521 module_param_named(debug, dbg_level, uint, 0); 9522 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 9523 9524 module_param(force_load, bool, 0444); 9525 MODULE_PARM_DESC(force_load, 9526 "Attempts to load the driver even on a " 9527 "mis-identified ThinkPad when true"); 9528 9529 module_param_named(fan_control, fan_control_allowed, bool, 0444); 9530 MODULE_PARM_DESC(fan_control, 9531 "Enables setting fan parameters features when true"); 9532 9533 module_param_named(brightness_mode, brightness_mode, uint, 0444); 9534 MODULE_PARM_DESC(brightness_mode, 9535 "Selects brightness control strategy: " 9536 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 9537 9538 module_param(brightness_enable, uint, 0444); 9539 MODULE_PARM_DESC(brightness_enable, 9540 "Enables backlight control when 1, disables when 0"); 9541 9542 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 9543 module_param_named(volume_mode, volume_mode, uint, 0444); 9544 MODULE_PARM_DESC(volume_mode, 9545 "Selects volume control strategy: " 9546 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 9547 9548 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 9549 MODULE_PARM_DESC(volume_capabilities, 9550 "Selects the mixer capabilites: " 9551 "0=auto, 1=volume and mute, 2=mute only"); 9552 9553 module_param_named(volume_control, volume_control_allowed, bool, 0444); 9554 MODULE_PARM_DESC(volume_control, 9555 "Enables software override for the console audio " 9556 "control when true"); 9557 9558 module_param_named(software_mute, software_mute_requested, bool, 0444); 9559 MODULE_PARM_DESC(software_mute, 9560 "Request full software mute control"); 9561 9562 /* ALSA module API parameters */ 9563 module_param_named(index, alsa_index, int, 0444); 9564 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 9565 module_param_named(id, alsa_id, charp, 0444); 9566 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 9567 module_param_named(enable, alsa_enable, bool, 0444); 9568 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 9569 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 9570 9571 #define TPACPI_PARAM(feature) \ 9572 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 9573 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 9574 "at module load, see documentation") 9575 9576 TPACPI_PARAM(hotkey); 9577 TPACPI_PARAM(bluetooth); 9578 TPACPI_PARAM(video); 9579 TPACPI_PARAM(light); 9580 TPACPI_PARAM(cmos); 9581 TPACPI_PARAM(led); 9582 TPACPI_PARAM(beep); 9583 TPACPI_PARAM(brightness); 9584 TPACPI_PARAM(volume); 9585 TPACPI_PARAM(fan); 9586 9587 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 9588 module_param(dbg_wlswemul, uint, 0444); 9589 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 9590 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 9591 MODULE_PARM_DESC(wlsw_state, 9592 "Initial state of the emulated WLSW switch"); 9593 9594 module_param(dbg_bluetoothemul, uint, 0444); 9595 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 9596 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 9597 MODULE_PARM_DESC(bluetooth_state, 9598 "Initial state of the emulated bluetooth switch"); 9599 9600 module_param(dbg_wwanemul, uint, 0444); 9601 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 9602 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 9603 MODULE_PARM_DESC(wwan_state, 9604 "Initial state of the emulated WWAN switch"); 9605 9606 module_param(dbg_uwbemul, uint, 0444); 9607 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 9608 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 9609 MODULE_PARM_DESC(uwb_state, 9610 "Initial state of the emulated UWB switch"); 9611 #endif 9612 9613 static void thinkpad_acpi_module_exit(void) 9614 { 9615 struct ibm_struct *ibm, *itmp; 9616 9617 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 9618 9619 list_for_each_entry_safe_reverse(ibm, itmp, 9620 &tpacpi_all_drivers, 9621 all_drivers) { 9622 ibm_exit(ibm); 9623 } 9624 9625 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 9626 9627 if (tpacpi_inputdev) { 9628 if (tp_features.input_device_registered) 9629 input_unregister_device(tpacpi_inputdev); 9630 else 9631 input_free_device(tpacpi_inputdev); 9632 kfree(hotkey_keycode_map); 9633 } 9634 9635 if (tpacpi_hwmon) 9636 hwmon_device_unregister(tpacpi_hwmon); 9637 9638 if (tp_features.sensors_pdev_attrs_registered) 9639 device_remove_file(&tpacpi_sensors_pdev->dev, &dev_attr_name); 9640 if (tpacpi_sensors_pdev) 9641 platform_device_unregister(tpacpi_sensors_pdev); 9642 if (tpacpi_pdev) 9643 platform_device_unregister(tpacpi_pdev); 9644 9645 if (tp_features.sensors_pdrv_attrs_registered) 9646 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 9647 if (tp_features.platform_drv_attrs_registered) 9648 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 9649 9650 if (tp_features.sensors_pdrv_registered) 9651 platform_driver_unregister(&tpacpi_hwmon_pdriver); 9652 9653 if (tp_features.platform_drv_registered) 9654 platform_driver_unregister(&tpacpi_pdriver); 9655 9656 if (proc_dir) 9657 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 9658 9659 if (tpacpi_wq) 9660 destroy_workqueue(tpacpi_wq); 9661 9662 kfree(thinkpad_id.bios_version_str); 9663 kfree(thinkpad_id.ec_version_str); 9664 kfree(thinkpad_id.model_str); 9665 kfree(thinkpad_id.nummodel_str); 9666 } 9667 9668 9669 static int __init thinkpad_acpi_module_init(void) 9670 { 9671 int ret, i; 9672 9673 tpacpi_lifecycle = TPACPI_LIFE_INIT; 9674 9675 /* Driver-level probe */ 9676 9677 ret = get_thinkpad_model_data(&thinkpad_id); 9678 if (ret) { 9679 pr_err("unable to get DMI data: %d\n", ret); 9680 thinkpad_acpi_module_exit(); 9681 return ret; 9682 } 9683 ret = probe_for_thinkpad(); 9684 if (ret) { 9685 thinkpad_acpi_module_exit(); 9686 return ret; 9687 } 9688 9689 /* Driver initialization */ 9690 9691 thinkpad_acpi_init_banner(); 9692 tpacpi_check_outdated_fw(); 9693 9694 TPACPI_ACPIHANDLE_INIT(ecrd); 9695 TPACPI_ACPIHANDLE_INIT(ecwr); 9696 9697 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 9698 if (!tpacpi_wq) { 9699 thinkpad_acpi_module_exit(); 9700 return -ENOMEM; 9701 } 9702 9703 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 9704 if (!proc_dir) { 9705 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 9706 thinkpad_acpi_module_exit(); 9707 return -ENODEV; 9708 } 9709 9710 ret = platform_driver_register(&tpacpi_pdriver); 9711 if (ret) { 9712 pr_err("unable to register main platform driver\n"); 9713 thinkpad_acpi_module_exit(); 9714 return ret; 9715 } 9716 tp_features.platform_drv_registered = 1; 9717 9718 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 9719 if (ret) { 9720 pr_err("unable to register hwmon platform driver\n"); 9721 thinkpad_acpi_module_exit(); 9722 return ret; 9723 } 9724 tp_features.sensors_pdrv_registered = 1; 9725 9726 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 9727 if (!ret) { 9728 tp_features.platform_drv_attrs_registered = 1; 9729 ret = tpacpi_create_driver_attributes( 9730 &tpacpi_hwmon_pdriver.driver); 9731 } 9732 if (ret) { 9733 pr_err("unable to create sysfs driver attributes\n"); 9734 thinkpad_acpi_module_exit(); 9735 return ret; 9736 } 9737 tp_features.sensors_pdrv_attrs_registered = 1; 9738 9739 9740 /* Device initialization */ 9741 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9742 NULL, 0); 9743 if (IS_ERR(tpacpi_pdev)) { 9744 ret = PTR_ERR(tpacpi_pdev); 9745 tpacpi_pdev = NULL; 9746 pr_err("unable to register platform device\n"); 9747 thinkpad_acpi_module_exit(); 9748 return ret; 9749 } 9750 tpacpi_sensors_pdev = platform_device_register_simple( 9751 TPACPI_HWMON_DRVR_NAME, 9752 -1, NULL, 0); 9753 if (IS_ERR(tpacpi_sensors_pdev)) { 9754 ret = PTR_ERR(tpacpi_sensors_pdev); 9755 tpacpi_sensors_pdev = NULL; 9756 pr_err("unable to register hwmon platform device\n"); 9757 thinkpad_acpi_module_exit(); 9758 return ret; 9759 } 9760 ret = device_create_file(&tpacpi_sensors_pdev->dev, &dev_attr_name); 9761 if (ret) { 9762 pr_err("unable to create sysfs hwmon device attributes\n"); 9763 thinkpad_acpi_module_exit(); 9764 return ret; 9765 } 9766 tp_features.sensors_pdev_attrs_registered = 1; 9767 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9768 if (IS_ERR(tpacpi_hwmon)) { 9769 ret = PTR_ERR(tpacpi_hwmon); 9770 tpacpi_hwmon = NULL; 9771 pr_err("unable to register hwmon device\n"); 9772 thinkpad_acpi_module_exit(); 9773 return ret; 9774 } 9775 mutex_init(&tpacpi_inputdev_send_mutex); 9776 tpacpi_inputdev = input_allocate_device(); 9777 if (!tpacpi_inputdev) { 9778 thinkpad_acpi_module_exit(); 9779 return -ENOMEM; 9780 } else { 9781 /* Prepare input device, but don't register */ 9782 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9783 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9784 tpacpi_inputdev->id.bustype = BUS_HOST; 9785 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9786 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9787 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9788 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9789 } 9790 9791 /* Init subdriver dependencies */ 9792 tpacpi_detect_brightness_capabilities(); 9793 9794 /* Init subdrivers */ 9795 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9796 ret = ibm_init(&ibms_init[i]); 9797 if (ret >= 0 && *ibms_init[i].param) 9798 ret = ibms_init[i].data->write(ibms_init[i].param); 9799 if (ret < 0) { 9800 thinkpad_acpi_module_exit(); 9801 return ret; 9802 } 9803 } 9804 9805 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9806 9807 ret = input_register_device(tpacpi_inputdev); 9808 if (ret < 0) { 9809 pr_err("unable to register input device\n"); 9810 thinkpad_acpi_module_exit(); 9811 return ret; 9812 } else { 9813 tp_features.input_device_registered = 1; 9814 } 9815 9816 return 0; 9817 } 9818 9819 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9820 9821 /* 9822 * This will autoload the driver in almost every ThinkPad 9823 * in widespread use. 9824 * 9825 * Only _VERY_ old models, like the 240, 240x and 570 lack 9826 * the HKEY event interface. 9827 */ 9828 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9829 9830 /* 9831 * DMI matching for module autoloading 9832 * 9833 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9834 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9835 * 9836 * Only models listed in thinkwiki will be supported, so add yours 9837 * if it is not there yet. 9838 */ 9839 #define IBM_BIOS_MODULE_ALIAS(__type) \ 9840 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9841 9842 /* Ancient thinkpad BIOSes have to be identified by 9843 * BIOS type or model number, and there are far less 9844 * BIOS types than model numbers... */ 9845 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9846 9847 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9848 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9849 MODULE_DESCRIPTION(TPACPI_DESC); 9850 MODULE_VERSION(TPACPI_VERSION); 9851 MODULE_LICENSE("GPL"); 9852 9853 module_init(thinkpad_acpi_module_init); 9854 module_exit(thinkpad_acpi_module_exit); 9855