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_adaptive_all_mask; /* all adaptive events supported in fw */ 2047 static u32 hotkey_reserved_mask; /* events better left disabled */ 2048 static u32 hotkey_driver_mask; /* events needed by the driver */ 2049 static u32 hotkey_user_mask; /* events visible to userspace */ 2050 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2051 2052 static u16 *hotkey_keycode_map; 2053 2054 static struct attribute_set *hotkey_dev_attributes; 2055 2056 static void tpacpi_driver_event(const unsigned int hkey_event); 2057 static void hotkey_driver_event(const unsigned int scancode); 2058 static void hotkey_poll_setup(const bool may_warn); 2059 2060 /* HKEY.MHKG() return bits */ 2061 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2062 2063 static int hotkey_get_wlsw(void) 2064 { 2065 int status; 2066 2067 if (!tp_features.hotkey_wlsw) 2068 return -ENODEV; 2069 2070 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2071 if (dbg_wlswemul) 2072 return (tpacpi_wlsw_emulstate) ? 2073 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2074 #endif 2075 2076 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2077 return -EIO; 2078 2079 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2080 } 2081 2082 static int hotkey_get_tablet_mode(int *status) 2083 { 2084 int s; 2085 2086 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2087 return -EIO; 2088 2089 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2090 return 0; 2091 } 2092 2093 /* 2094 * Reads current event mask from firmware, and updates 2095 * hotkey_acpi_mask accordingly. Also resets any bits 2096 * from hotkey_user_mask that are unavailable to be 2097 * delivered (shadow requirement of the userspace ABI). 2098 * 2099 * Call with hotkey_mutex held 2100 */ 2101 static int hotkey_mask_get(void) 2102 { 2103 if (tp_features.hotkey_mask) { 2104 u32 m = 0; 2105 2106 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2107 return -EIO; 2108 2109 hotkey_acpi_mask = m; 2110 } else { 2111 /* no mask support doesn't mean no event support... */ 2112 hotkey_acpi_mask = hotkey_all_mask; 2113 } 2114 2115 /* sync userspace-visible mask */ 2116 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2117 2118 return 0; 2119 } 2120 2121 static void hotkey_mask_warn_incomplete_mask(void) 2122 { 2123 /* log only what the user can fix... */ 2124 const u32 wantedmask = hotkey_driver_mask & 2125 ~(hotkey_acpi_mask | hotkey_source_mask) & 2126 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2127 2128 if (wantedmask) 2129 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2130 } 2131 2132 /* 2133 * Set the firmware mask when supported 2134 * 2135 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2136 * 2137 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2138 * 2139 * Call with hotkey_mutex held 2140 */ 2141 static int hotkey_mask_set(u32 mask) 2142 { 2143 int i; 2144 int rc = 0; 2145 2146 const u32 fwmask = mask & ~hotkey_source_mask; 2147 2148 if (tp_features.hotkey_mask) { 2149 for (i = 0; i < 32; i++) { 2150 if (!acpi_evalf(hkey_handle, 2151 NULL, "MHKM", "vdd", i + 1, 2152 !!(mask & (1 << i)))) { 2153 rc = -EIO; 2154 break; 2155 } 2156 } 2157 } 2158 2159 /* 2160 * We *must* make an inconditional call to hotkey_mask_get to 2161 * refresh hotkey_acpi_mask and update hotkey_user_mask 2162 * 2163 * Take the opportunity to also log when we cannot _enable_ 2164 * a given event. 2165 */ 2166 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2167 pr_notice("asked for hotkey mask 0x%08x, but " 2168 "firmware forced it to 0x%08x\n", 2169 fwmask, hotkey_acpi_mask); 2170 } 2171 2172 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2173 hotkey_mask_warn_incomplete_mask(); 2174 2175 return rc; 2176 } 2177 2178 /* 2179 * Sets hotkey_user_mask and tries to set the firmware mask 2180 * 2181 * Call with hotkey_mutex held 2182 */ 2183 static int hotkey_user_mask_set(const u32 mask) 2184 { 2185 int rc; 2186 2187 /* Give people a chance to notice they are doing something that 2188 * is bound to go boom on their users sooner or later */ 2189 if (!tp_warned.hotkey_mask_ff && 2190 (mask == 0xffff || mask == 0xffffff || 2191 mask == 0xffffffff)) { 2192 tp_warned.hotkey_mask_ff = 1; 2193 pr_notice("setting the hotkey mask to 0x%08x is likely " 2194 "not the best way to go about it\n", mask); 2195 pr_notice("please consider using the driver defaults, " 2196 "and refer to up-to-date thinkpad-acpi " 2197 "documentation\n"); 2198 } 2199 2200 /* Try to enable what the user asked for, plus whatever we need. 2201 * this syncs everything but won't enable bits in hotkey_user_mask */ 2202 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2203 2204 /* Enable the available bits in hotkey_user_mask */ 2205 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2206 2207 return rc; 2208 } 2209 2210 /* 2211 * Sets the driver hotkey mask. 2212 * 2213 * Can be called even if the hotkey subdriver is inactive 2214 */ 2215 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2216 { 2217 int rc; 2218 2219 /* Do the right thing if hotkey_init has not been called yet */ 2220 if (!tp_features.hotkey) { 2221 hotkey_driver_mask = mask; 2222 return 0; 2223 } 2224 2225 mutex_lock(&hotkey_mutex); 2226 2227 HOTKEY_CONFIG_CRITICAL_START 2228 hotkey_driver_mask = mask; 2229 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2230 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2231 #endif 2232 HOTKEY_CONFIG_CRITICAL_END 2233 2234 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2235 ~hotkey_source_mask); 2236 hotkey_poll_setup(true); 2237 2238 mutex_unlock(&hotkey_mutex); 2239 2240 return rc; 2241 } 2242 2243 static int hotkey_status_get(int *status) 2244 { 2245 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2246 return -EIO; 2247 2248 return 0; 2249 } 2250 2251 static int hotkey_status_set(bool enable) 2252 { 2253 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2254 return -EIO; 2255 2256 return 0; 2257 } 2258 2259 static void tpacpi_input_send_tabletsw(void) 2260 { 2261 int state; 2262 2263 if (tp_features.hotkey_tablet && 2264 !hotkey_get_tablet_mode(&state)) { 2265 mutex_lock(&tpacpi_inputdev_send_mutex); 2266 2267 input_report_switch(tpacpi_inputdev, 2268 SW_TABLET_MODE, !!state); 2269 input_sync(tpacpi_inputdev); 2270 2271 mutex_unlock(&tpacpi_inputdev_send_mutex); 2272 } 2273 } 2274 2275 /* Do NOT call without validating scancode first */ 2276 static void tpacpi_input_send_key(const unsigned int scancode) 2277 { 2278 const unsigned int keycode = hotkey_keycode_map[scancode]; 2279 2280 if (keycode != KEY_RESERVED) { 2281 mutex_lock(&tpacpi_inputdev_send_mutex); 2282 2283 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2284 input_report_key(tpacpi_inputdev, keycode, 1); 2285 input_sync(tpacpi_inputdev); 2286 2287 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2288 input_report_key(tpacpi_inputdev, keycode, 0); 2289 input_sync(tpacpi_inputdev); 2290 2291 mutex_unlock(&tpacpi_inputdev_send_mutex); 2292 } 2293 } 2294 2295 /* Do NOT call without validating scancode first */ 2296 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2297 { 2298 hotkey_driver_event(scancode); 2299 if (hotkey_user_mask & (1 << scancode)) 2300 tpacpi_input_send_key(scancode); 2301 } 2302 2303 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2304 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2305 2306 /* Do NOT call without validating scancode first */ 2307 static void tpacpi_hotkey_send_key(unsigned int scancode) 2308 { 2309 tpacpi_input_send_key_masked(scancode); 2310 } 2311 2312 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2313 { 2314 u8 d; 2315 2316 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2317 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2318 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2319 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2320 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2321 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2322 } 2323 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2324 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2325 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2326 } 2327 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2328 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2329 n->displayexp_toggle = 2330 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2331 } 2332 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2333 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2334 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2335 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2336 n->brightness_toggle = 2337 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2338 } 2339 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2340 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2341 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2342 >> TP_NVRAM_POS_LEVEL_VOLUME; 2343 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2344 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2345 } 2346 } 2347 2348 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2349 do { \ 2350 if ((event_mask & (1 << __scancode)) && \ 2351 oldn->__member != newn->__member) \ 2352 tpacpi_hotkey_send_key(__scancode); \ 2353 } while (0) 2354 2355 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2356 do { \ 2357 if (event_mask & (1 << __scancode)) \ 2358 tpacpi_hotkey_send_key(__scancode); \ 2359 } while (0) 2360 2361 static void issue_volchange(const unsigned int oldvol, 2362 const unsigned int newvol, 2363 const u32 event_mask) 2364 { 2365 unsigned int i = oldvol; 2366 2367 while (i > newvol) { 2368 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2369 i--; 2370 } 2371 while (i < newvol) { 2372 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2373 i++; 2374 } 2375 } 2376 2377 static void issue_brightnesschange(const unsigned int oldbrt, 2378 const unsigned int newbrt, 2379 const u32 event_mask) 2380 { 2381 unsigned int i = oldbrt; 2382 2383 while (i > newbrt) { 2384 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2385 i--; 2386 } 2387 while (i < newbrt) { 2388 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2389 i++; 2390 } 2391 } 2392 2393 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2394 struct tp_nvram_state *newn, 2395 const u32 event_mask) 2396 { 2397 2398 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2399 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2400 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2401 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2402 2403 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2404 2405 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2406 2407 /* 2408 * Handle volume 2409 * 2410 * This code is supposed to duplicate the IBM firmware behaviour: 2411 * - Pressing MUTE issues mute hotkey message, even when already mute 2412 * - Pressing Volume up/down issues volume up/down hotkey messages, 2413 * even when already at maximum or minimum volume 2414 * - The act of unmuting issues volume up/down notification, 2415 * depending which key was used to unmute 2416 * 2417 * We are constrained to what the NVRAM can tell us, which is not much 2418 * and certainly not enough if more than one volume hotkey was pressed 2419 * since the last poll cycle. 2420 * 2421 * Just to make our life interesting, some newer Lenovo ThinkPads have 2422 * bugs in the BIOS and may fail to update volume_toggle properly. 2423 */ 2424 if (newn->mute) { 2425 /* muted */ 2426 if (!oldn->mute || 2427 oldn->volume_toggle != newn->volume_toggle || 2428 oldn->volume_level != newn->volume_level) { 2429 /* recently muted, or repeated mute keypress, or 2430 * multiple presses ending in mute */ 2431 issue_volchange(oldn->volume_level, newn->volume_level, 2432 event_mask); 2433 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2434 } 2435 } else { 2436 /* unmute */ 2437 if (oldn->mute) { 2438 /* recently unmuted, issue 'unmute' keypress */ 2439 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2440 } 2441 if (oldn->volume_level != newn->volume_level) { 2442 issue_volchange(oldn->volume_level, newn->volume_level, 2443 event_mask); 2444 } else if (oldn->volume_toggle != newn->volume_toggle) { 2445 /* repeated vol up/down keypress at end of scale ? */ 2446 if (newn->volume_level == 0) 2447 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2448 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2449 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2450 } 2451 } 2452 2453 /* handle brightness */ 2454 if (oldn->brightness_level != newn->brightness_level) { 2455 issue_brightnesschange(oldn->brightness_level, 2456 newn->brightness_level, event_mask); 2457 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2458 /* repeated key presses that didn't change state */ 2459 if (newn->brightness_level == 0) 2460 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2461 else if (newn->brightness_level >= bright_maxlvl 2462 && !tp_features.bright_unkfw) 2463 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2464 } 2465 2466 #undef TPACPI_COMPARE_KEY 2467 #undef TPACPI_MAY_SEND_KEY 2468 } 2469 2470 /* 2471 * Polling driver 2472 * 2473 * We track all events in hotkey_source_mask all the time, since 2474 * most of them are edge-based. We only issue those requested by 2475 * hotkey_user_mask or hotkey_driver_mask, though. 2476 */ 2477 static int hotkey_kthread(void *data) 2478 { 2479 struct tp_nvram_state s[2]; 2480 u32 poll_mask, event_mask; 2481 unsigned int si, so; 2482 unsigned long t; 2483 unsigned int change_detector; 2484 unsigned int poll_freq; 2485 bool was_frozen; 2486 2487 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2488 goto exit; 2489 2490 set_freezable(); 2491 2492 so = 0; 2493 si = 1; 2494 t = 0; 2495 2496 /* Initial state for compares */ 2497 mutex_lock(&hotkey_thread_data_mutex); 2498 change_detector = hotkey_config_change; 2499 poll_mask = hotkey_source_mask; 2500 event_mask = hotkey_source_mask & 2501 (hotkey_driver_mask | hotkey_user_mask); 2502 poll_freq = hotkey_poll_freq; 2503 mutex_unlock(&hotkey_thread_data_mutex); 2504 hotkey_read_nvram(&s[so], poll_mask); 2505 2506 while (!kthread_should_stop()) { 2507 if (t == 0) { 2508 if (likely(poll_freq)) 2509 t = 1000/poll_freq; 2510 else 2511 t = 100; /* should never happen... */ 2512 } 2513 t = msleep_interruptible(t); 2514 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2515 break; 2516 2517 if (t > 0 && !was_frozen) 2518 continue; 2519 2520 mutex_lock(&hotkey_thread_data_mutex); 2521 if (was_frozen || hotkey_config_change != change_detector) { 2522 /* forget old state on thaw or config change */ 2523 si = so; 2524 t = 0; 2525 change_detector = hotkey_config_change; 2526 } 2527 poll_mask = hotkey_source_mask; 2528 event_mask = hotkey_source_mask & 2529 (hotkey_driver_mask | hotkey_user_mask); 2530 poll_freq = hotkey_poll_freq; 2531 mutex_unlock(&hotkey_thread_data_mutex); 2532 2533 if (likely(poll_mask)) { 2534 hotkey_read_nvram(&s[si], poll_mask); 2535 if (likely(si != so)) { 2536 hotkey_compare_and_issue_event(&s[so], &s[si], 2537 event_mask); 2538 } 2539 } 2540 2541 so = si; 2542 si ^= 1; 2543 } 2544 2545 exit: 2546 return 0; 2547 } 2548 2549 /* call with hotkey_mutex held */ 2550 static void hotkey_poll_stop_sync(void) 2551 { 2552 if (tpacpi_hotkey_task) { 2553 kthread_stop(tpacpi_hotkey_task); 2554 tpacpi_hotkey_task = NULL; 2555 } 2556 } 2557 2558 /* call with hotkey_mutex held */ 2559 static void hotkey_poll_setup(const bool may_warn) 2560 { 2561 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2562 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2563 2564 if (hotkey_poll_freq > 0 && 2565 (poll_driver_mask || 2566 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2567 if (!tpacpi_hotkey_task) { 2568 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2569 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2570 if (IS_ERR(tpacpi_hotkey_task)) { 2571 tpacpi_hotkey_task = NULL; 2572 pr_err("could not create kernel thread " 2573 "for hotkey polling\n"); 2574 } 2575 } 2576 } else { 2577 hotkey_poll_stop_sync(); 2578 if (may_warn && (poll_driver_mask || poll_user_mask) && 2579 hotkey_poll_freq == 0) { 2580 pr_notice("hot keys 0x%08x and/or events 0x%08x " 2581 "require polling, which is currently " 2582 "disabled\n", 2583 poll_user_mask, poll_driver_mask); 2584 } 2585 } 2586 } 2587 2588 static void hotkey_poll_setup_safe(const bool may_warn) 2589 { 2590 mutex_lock(&hotkey_mutex); 2591 hotkey_poll_setup(may_warn); 2592 mutex_unlock(&hotkey_mutex); 2593 } 2594 2595 /* call with hotkey_mutex held */ 2596 static void hotkey_poll_set_freq(unsigned int freq) 2597 { 2598 if (!freq) 2599 hotkey_poll_stop_sync(); 2600 2601 hotkey_poll_freq = freq; 2602 } 2603 2604 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2605 2606 static void hotkey_poll_setup(const bool __unused) 2607 { 2608 } 2609 2610 static void hotkey_poll_setup_safe(const bool __unused) 2611 { 2612 } 2613 2614 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2615 2616 static int hotkey_inputdev_open(struct input_dev *dev) 2617 { 2618 switch (tpacpi_lifecycle) { 2619 case TPACPI_LIFE_INIT: 2620 case TPACPI_LIFE_RUNNING: 2621 hotkey_poll_setup_safe(false); 2622 return 0; 2623 case TPACPI_LIFE_EXITING: 2624 return -EBUSY; 2625 } 2626 2627 /* Should only happen if tpacpi_lifecycle is corrupt */ 2628 BUG(); 2629 return -EBUSY; 2630 } 2631 2632 static void hotkey_inputdev_close(struct input_dev *dev) 2633 { 2634 /* disable hotkey polling when possible */ 2635 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2636 !(hotkey_source_mask & hotkey_driver_mask)) 2637 hotkey_poll_setup_safe(false); 2638 } 2639 2640 /* sysfs hotkey enable ------------------------------------------------- */ 2641 static ssize_t hotkey_enable_show(struct device *dev, 2642 struct device_attribute *attr, 2643 char *buf) 2644 { 2645 int res, status; 2646 2647 printk_deprecated_attribute("hotkey_enable", 2648 "Hotkey reporting is always enabled"); 2649 2650 res = hotkey_status_get(&status); 2651 if (res) 2652 return res; 2653 2654 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2655 } 2656 2657 static ssize_t hotkey_enable_store(struct device *dev, 2658 struct device_attribute *attr, 2659 const char *buf, size_t count) 2660 { 2661 unsigned long t; 2662 2663 printk_deprecated_attribute("hotkey_enable", 2664 "Hotkeys can be disabled through hotkey_mask"); 2665 2666 if (parse_strtoul(buf, 1, &t)) 2667 return -EINVAL; 2668 2669 if (t == 0) 2670 return -EPERM; 2671 2672 return count; 2673 } 2674 2675 static DEVICE_ATTR_RW(hotkey_enable); 2676 2677 /* sysfs hotkey mask --------------------------------------------------- */ 2678 static ssize_t hotkey_mask_show(struct device *dev, 2679 struct device_attribute *attr, 2680 char *buf) 2681 { 2682 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2683 } 2684 2685 static ssize_t hotkey_mask_store(struct device *dev, 2686 struct device_attribute *attr, 2687 const char *buf, size_t count) 2688 { 2689 unsigned long t; 2690 int res; 2691 2692 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2693 return -EINVAL; 2694 2695 if (mutex_lock_killable(&hotkey_mutex)) 2696 return -ERESTARTSYS; 2697 2698 res = hotkey_user_mask_set(t); 2699 2700 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2701 hotkey_poll_setup(true); 2702 #endif 2703 2704 mutex_unlock(&hotkey_mutex); 2705 2706 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2707 2708 return (res) ? res : count; 2709 } 2710 2711 static DEVICE_ATTR_RW(hotkey_mask); 2712 2713 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2714 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2715 struct device_attribute *attr, 2716 char *buf) 2717 { 2718 return sprintf(buf, "0\n"); 2719 } 2720 2721 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2722 2723 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2724 static ssize_t hotkey_bios_mask_show(struct device *dev, 2725 struct device_attribute *attr, 2726 char *buf) 2727 { 2728 printk_deprecated_attribute("hotkey_bios_mask", 2729 "This attribute is useless."); 2730 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2731 } 2732 2733 static DEVICE_ATTR_RO(hotkey_bios_mask); 2734 2735 /* sysfs hotkey all_mask ----------------------------------------------- */ 2736 static ssize_t hotkey_all_mask_show(struct device *dev, 2737 struct device_attribute *attr, 2738 char *buf) 2739 { 2740 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2741 hotkey_all_mask | hotkey_source_mask); 2742 } 2743 2744 static DEVICE_ATTR_RO(hotkey_all_mask); 2745 2746 /* sysfs hotkey all_mask ----------------------------------------------- */ 2747 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev, 2748 struct device_attribute *attr, 2749 char *buf) 2750 { 2751 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2752 hotkey_adaptive_all_mask | hotkey_source_mask); 2753 } 2754 2755 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask); 2756 2757 /* sysfs hotkey recommended_mask --------------------------------------- */ 2758 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2759 struct device_attribute *attr, 2760 char *buf) 2761 { 2762 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2763 (hotkey_all_mask | hotkey_source_mask) 2764 & ~hotkey_reserved_mask); 2765 } 2766 2767 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2768 2769 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2770 2771 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2772 static ssize_t hotkey_source_mask_show(struct device *dev, 2773 struct device_attribute *attr, 2774 char *buf) 2775 { 2776 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2777 } 2778 2779 static ssize_t hotkey_source_mask_store(struct device *dev, 2780 struct device_attribute *attr, 2781 const char *buf, size_t count) 2782 { 2783 unsigned long t; 2784 u32 r_ev; 2785 int rc; 2786 2787 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2788 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2789 return -EINVAL; 2790 2791 if (mutex_lock_killable(&hotkey_mutex)) 2792 return -ERESTARTSYS; 2793 2794 HOTKEY_CONFIG_CRITICAL_START 2795 hotkey_source_mask = t; 2796 HOTKEY_CONFIG_CRITICAL_END 2797 2798 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2799 ~hotkey_source_mask); 2800 hotkey_poll_setup(true); 2801 2802 /* check if events needed by the driver got disabled */ 2803 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2804 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2805 2806 mutex_unlock(&hotkey_mutex); 2807 2808 if (rc < 0) 2809 pr_err("hotkey_source_mask: " 2810 "failed to update the firmware event mask!\n"); 2811 2812 if (r_ev) 2813 pr_notice("hotkey_source_mask: " 2814 "some important events were disabled: 0x%04x\n", 2815 r_ev); 2816 2817 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2818 2819 return (rc < 0) ? rc : count; 2820 } 2821 2822 static DEVICE_ATTR_RW(hotkey_source_mask); 2823 2824 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2825 static ssize_t hotkey_poll_freq_show(struct device *dev, 2826 struct device_attribute *attr, 2827 char *buf) 2828 { 2829 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2830 } 2831 2832 static ssize_t hotkey_poll_freq_store(struct device *dev, 2833 struct device_attribute *attr, 2834 const char *buf, size_t count) 2835 { 2836 unsigned long t; 2837 2838 if (parse_strtoul(buf, 25, &t)) 2839 return -EINVAL; 2840 2841 if (mutex_lock_killable(&hotkey_mutex)) 2842 return -ERESTARTSYS; 2843 2844 hotkey_poll_set_freq(t); 2845 hotkey_poll_setup(true); 2846 2847 mutex_unlock(&hotkey_mutex); 2848 2849 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2850 2851 return count; 2852 } 2853 2854 static DEVICE_ATTR_RW(hotkey_poll_freq); 2855 2856 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2857 2858 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2859 static ssize_t hotkey_radio_sw_show(struct device *dev, 2860 struct device_attribute *attr, 2861 char *buf) 2862 { 2863 int res; 2864 res = hotkey_get_wlsw(); 2865 if (res < 0) 2866 return res; 2867 2868 /* Opportunistic update */ 2869 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2870 2871 return snprintf(buf, PAGE_SIZE, "%d\n", 2872 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2873 } 2874 2875 static DEVICE_ATTR_RO(hotkey_radio_sw); 2876 2877 static void hotkey_radio_sw_notify_change(void) 2878 { 2879 if (tp_features.hotkey_wlsw) 2880 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2881 "hotkey_radio_sw"); 2882 } 2883 2884 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2885 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2886 struct device_attribute *attr, 2887 char *buf) 2888 { 2889 int res, s; 2890 res = hotkey_get_tablet_mode(&s); 2891 if (res < 0) 2892 return res; 2893 2894 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2895 } 2896 2897 static DEVICE_ATTR_RO(hotkey_tablet_mode); 2898 2899 static void hotkey_tablet_mode_notify_change(void) 2900 { 2901 if (tp_features.hotkey_tablet) 2902 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2903 "hotkey_tablet_mode"); 2904 } 2905 2906 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2907 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2908 struct device_attribute *attr, 2909 char *buf) 2910 { 2911 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2912 } 2913 2914 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2915 2916 static void hotkey_wakeup_reason_notify_change(void) 2917 { 2918 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2919 "wakeup_reason"); 2920 } 2921 2922 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2923 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2924 struct device_attribute *attr, 2925 char *buf) 2926 { 2927 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2928 } 2929 2930 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 2931 hotkey_wakeup_hotunplug_complete_show, NULL); 2932 2933 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2934 { 2935 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2936 "wakeup_hotunplug_complete"); 2937 } 2938 2939 /* sysfs adaptive kbd mode --------------------------------------------- */ 2940 2941 static int adaptive_keyboard_get_mode(void); 2942 static int adaptive_keyboard_set_mode(int new_mode); 2943 2944 enum ADAPTIVE_KEY_MODE { 2945 HOME_MODE, 2946 WEB_BROWSER_MODE, 2947 WEB_CONFERENCE_MODE, 2948 FUNCTION_MODE, 2949 LAYFLAT_MODE 2950 }; 2951 2952 static ssize_t adaptive_kbd_mode_show(struct device *dev, 2953 struct device_attribute *attr, 2954 char *buf) 2955 { 2956 int current_mode; 2957 2958 current_mode = adaptive_keyboard_get_mode(); 2959 if (current_mode < 0) 2960 return current_mode; 2961 2962 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 2963 } 2964 2965 static ssize_t adaptive_kbd_mode_store(struct device *dev, 2966 struct device_attribute *attr, 2967 const char *buf, size_t count) 2968 { 2969 unsigned long t; 2970 int res; 2971 2972 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 2973 return -EINVAL; 2974 2975 res = adaptive_keyboard_set_mode(t); 2976 return (res < 0) ? res : count; 2977 } 2978 2979 static DEVICE_ATTR_RW(adaptive_kbd_mode); 2980 2981 static struct attribute *adaptive_kbd_attributes[] = { 2982 &dev_attr_adaptive_kbd_mode.attr, 2983 NULL 2984 }; 2985 2986 static const struct attribute_group adaptive_kbd_attr_group = { 2987 .attrs = adaptive_kbd_attributes, 2988 }; 2989 2990 /* --------------------------------------------------------------------- */ 2991 2992 static struct attribute *hotkey_attributes[] __initdata = { 2993 &dev_attr_hotkey_enable.attr, 2994 &dev_attr_hotkey_bios_enabled.attr, 2995 &dev_attr_hotkey_bios_mask.attr, 2996 &dev_attr_wakeup_reason.attr, 2997 &dev_attr_wakeup_hotunplug_complete.attr, 2998 &dev_attr_hotkey_mask.attr, 2999 &dev_attr_hotkey_all_mask.attr, 3000 &dev_attr_hotkey_adaptive_all_mask.attr, 3001 &dev_attr_hotkey_recommended_mask.attr, 3002 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3003 &dev_attr_hotkey_source_mask.attr, 3004 &dev_attr_hotkey_poll_freq.attr, 3005 #endif 3006 }; 3007 3008 /* 3009 * Sync both the hw and sw blocking state of all switches 3010 */ 3011 static void tpacpi_send_radiosw_update(void) 3012 { 3013 int wlsw; 3014 3015 /* 3016 * We must sync all rfkill controllers *before* issuing any 3017 * rfkill input events, or we will race the rfkill core input 3018 * handler. 3019 * 3020 * tpacpi_inputdev_send_mutex works as a synchronization point 3021 * for the above. 3022 * 3023 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3024 */ 3025 3026 wlsw = hotkey_get_wlsw(); 3027 3028 /* Sync hw blocking state first if it is hw-blocked */ 3029 if (wlsw == TPACPI_RFK_RADIO_OFF) 3030 tpacpi_rfk_update_hwblock_state(true); 3031 3032 /* Sync sw blocking state */ 3033 tpacpi_rfk_update_swstate_all(); 3034 3035 /* Sync hw blocking state last if it is hw-unblocked */ 3036 if (wlsw == TPACPI_RFK_RADIO_ON) 3037 tpacpi_rfk_update_hwblock_state(false); 3038 3039 /* Issue rfkill input event for WLSW switch */ 3040 if (!(wlsw < 0)) { 3041 mutex_lock(&tpacpi_inputdev_send_mutex); 3042 3043 input_report_switch(tpacpi_inputdev, 3044 SW_RFKILL_ALL, (wlsw > 0)); 3045 input_sync(tpacpi_inputdev); 3046 3047 mutex_unlock(&tpacpi_inputdev_send_mutex); 3048 } 3049 3050 /* 3051 * this can be unconditional, as we will poll state again 3052 * if userspace uses the notify to read data 3053 */ 3054 hotkey_radio_sw_notify_change(); 3055 } 3056 3057 static void hotkey_exit(void) 3058 { 3059 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3060 mutex_lock(&hotkey_mutex); 3061 hotkey_poll_stop_sync(); 3062 mutex_unlock(&hotkey_mutex); 3063 #endif 3064 3065 if (hotkey_dev_attributes) 3066 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3067 3068 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3069 "restoring original HKEY status and mask\n"); 3070 /* yes, there is a bitwise or below, we want the 3071 * functions to be called even if one of them fail */ 3072 if (((tp_features.hotkey_mask && 3073 hotkey_mask_set(hotkey_orig_mask)) | 3074 hotkey_status_set(false)) != 0) 3075 pr_err("failed to restore hot key mask " 3076 "to BIOS defaults\n"); 3077 } 3078 3079 static void __init hotkey_unmap(const unsigned int scancode) 3080 { 3081 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3082 clear_bit(hotkey_keycode_map[scancode], 3083 tpacpi_inputdev->keybit); 3084 hotkey_keycode_map[scancode] = KEY_RESERVED; 3085 } 3086 } 3087 3088 /* 3089 * HKEY quirks: 3090 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3091 */ 3092 3093 #define TPACPI_HK_Q_INIMASK 0x0001 3094 3095 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3096 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3097 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3098 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3099 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3100 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3101 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3102 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3103 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3104 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3105 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3106 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3107 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3108 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3109 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3110 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3111 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3112 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3113 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3114 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3115 }; 3116 3117 typedef u16 tpacpi_keymap_entry_t; 3118 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3119 3120 static int __init hotkey_init(struct ibm_init_struct *iibm) 3121 { 3122 /* Requirements for changing the default keymaps: 3123 * 3124 * 1. Many of the keys are mapped to KEY_RESERVED for very 3125 * good reasons. Do not change them unless you have deep 3126 * knowledge on the IBM and Lenovo ThinkPad firmware for 3127 * the various ThinkPad models. The driver behaves 3128 * differently for KEY_RESERVED: such keys have their 3129 * hot key mask *unset* in mask_recommended, and also 3130 * in the initial hot key mask programmed into the 3131 * firmware at driver load time, which means the firm- 3132 * ware may react very differently if you change them to 3133 * something else; 3134 * 3135 * 2. You must be subscribed to the linux-thinkpad and 3136 * ibm-acpi-devel mailing lists, and you should read the 3137 * list archives since 2007 if you want to change the 3138 * keymaps. This requirement exists so that you will 3139 * know the past history of problems with the thinkpad- 3140 * acpi driver keymaps, and also that you will be 3141 * listening to any bug reports; 3142 * 3143 * 3. Do not send thinkpad-acpi specific patches directly to 3144 * for merging, *ever*. Send them to the linux-acpi 3145 * mailinglist for comments. Merging is to be done only 3146 * through acpi-test and the ACPI maintainer. 3147 * 3148 * If the above is too much to ask, don't change the keymap. 3149 * Ask the thinkpad-acpi maintainer to do it, instead. 3150 */ 3151 3152 enum keymap_index { 3153 TPACPI_KEYMAP_IBM_GENERIC = 0, 3154 TPACPI_KEYMAP_LENOVO_GENERIC, 3155 }; 3156 3157 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3158 /* Generic keymap for IBM ThinkPads */ 3159 [TPACPI_KEYMAP_IBM_GENERIC] = { 3160 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3161 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3162 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3163 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3164 3165 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3166 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3167 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3168 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3169 3170 /* brightness: firmware always reacts to them */ 3171 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3172 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3173 3174 /* Thinklight: firmware always react to it */ 3175 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3176 3177 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3178 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3179 3180 /* Volume: firmware always react to it and reprograms 3181 * the built-in *extra* mixer. Never map it to control 3182 * another mixer by default. */ 3183 KEY_RESERVED, /* 0x14: VOLUME UP */ 3184 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3185 KEY_RESERVED, /* 0x16: MUTE */ 3186 3187 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3188 3189 /* (assignments unknown, please report if found) */ 3190 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3191 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3192 3193 /* No assignments, only used for Adaptive keyboards. */ 3194 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3195 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3196 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3197 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3198 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3199 }, 3200 3201 /* Generic keymap for Lenovo ThinkPads */ 3202 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3203 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3204 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3205 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3206 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3207 3208 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3209 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3210 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3211 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3212 3213 /* These should be enabled --only-- when ACPI video 3214 * is disabled (i.e. in "vendor" mode), and are handled 3215 * in a special way by the init code */ 3216 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3217 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3218 3219 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3220 3221 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3222 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3223 3224 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3225 * react to it and reprograms the built-in *extra* mixer. 3226 * Never map it to control another mixer by default. 3227 * 3228 * T60?, T61, R60?, R61: firmware and EC tries to send 3229 * these over the regular keyboard, so these are no-ops, 3230 * but there are still weird bugs re. MUTE, so do not 3231 * change unless you get test reports from all Lenovo 3232 * models. May cause the BIOS to interfere with the 3233 * HDA mixer. 3234 */ 3235 KEY_RESERVED, /* 0x14: VOLUME UP */ 3236 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3237 KEY_RESERVED, /* 0x16: MUTE */ 3238 3239 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3240 3241 /* (assignments unknown, please report if found) */ 3242 KEY_UNKNOWN, KEY_UNKNOWN, 3243 3244 /* 3245 * The mic mute button only sends 0x1a. It does not 3246 * automatically mute the mic or change the mute light. 3247 */ 3248 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3249 3250 /* (assignments unknown, please report if found) */ 3251 KEY_UNKNOWN, 3252 3253 /* Extra keys in use since the X240 / T440 / T540 */ 3254 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3255 3256 /* 3257 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3258 * The first item in this list is the Mute button which is 3259 * emitted with 0x103 through 3260 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3261 * symbol is held. 3262 * We'll need to offset those by 0x20. 3263 */ 3264 KEY_RESERVED, /* Mute held, 0x103 */ 3265 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3266 KEY_RESERVED, /* Clipping tool */ 3267 KEY_RESERVED, /* Cloud */ 3268 KEY_RESERVED, 3269 KEY_VOICECOMMAND, /* Voice */ 3270 KEY_RESERVED, 3271 KEY_RESERVED, /* Gestures */ 3272 KEY_RESERVED, 3273 KEY_RESERVED, 3274 KEY_RESERVED, 3275 KEY_CONFIG, /* Settings */ 3276 KEY_RESERVED, /* New tab */ 3277 KEY_REFRESH, /* Reload */ 3278 KEY_BACK, /* Back */ 3279 KEY_RESERVED, /* Microphone down */ 3280 KEY_RESERVED, /* Microphone up */ 3281 KEY_RESERVED, /* Microphone cancellation */ 3282 KEY_RESERVED, /* Camera mode */ 3283 KEY_RESERVED, /* Rotate display, 0x116 */ 3284 }, 3285 }; 3286 3287 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3288 /* Generic maps (fallback) */ 3289 { 3290 .vendor = PCI_VENDOR_ID_IBM, 3291 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3292 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3293 }, 3294 { 3295 .vendor = PCI_VENDOR_ID_LENOVO, 3296 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3297 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3298 }, 3299 }; 3300 3301 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3302 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3303 3304 int res, i; 3305 int status; 3306 int hkeyv; 3307 bool radiosw_state = false; 3308 bool tabletsw_state = false; 3309 3310 unsigned long quirks; 3311 unsigned long keymap_id; 3312 3313 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3314 "initializing hotkey subdriver\n"); 3315 3316 BUG_ON(!tpacpi_inputdev); 3317 BUG_ON(tpacpi_inputdev->open != NULL || 3318 tpacpi_inputdev->close != NULL); 3319 3320 TPACPI_ACPIHANDLE_INIT(hkey); 3321 mutex_init(&hotkey_mutex); 3322 3323 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3324 mutex_init(&hotkey_thread_data_mutex); 3325 #endif 3326 3327 /* hotkey not supported on 570 */ 3328 tp_features.hotkey = hkey_handle != NULL; 3329 3330 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3331 "hotkeys are %s\n", 3332 str_supported(tp_features.hotkey)); 3333 3334 if (!tp_features.hotkey) 3335 return 1; 3336 3337 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3338 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3339 3340 tpacpi_disable_brightness_delay(); 3341 3342 /* MUST have enough space for all attributes to be added to 3343 * hotkey_dev_attributes */ 3344 hotkey_dev_attributes = create_attr_set( 3345 ARRAY_SIZE(hotkey_attributes) + 2, 3346 NULL); 3347 if (!hotkey_dev_attributes) 3348 return -ENOMEM; 3349 res = add_many_to_attr_set(hotkey_dev_attributes, 3350 hotkey_attributes, 3351 ARRAY_SIZE(hotkey_attributes)); 3352 if (res) 3353 goto err_exit; 3354 3355 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3356 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3357 for HKEY interface version 0x100 */ 3358 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3359 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3360 "firmware HKEY interface version: 0x%x\n", 3361 hkeyv); 3362 3363 switch (hkeyv >> 8) { 3364 case 1: 3365 /* 3366 * MHKV 0x100 in A31, R40, R40e, 3367 * T4x, X31, and later 3368 */ 3369 3370 /* Paranoia check AND init hotkey_all_mask */ 3371 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3372 "MHKA", "qd")) { 3373 pr_err("missing MHKA handler, please report this to %s\n", 3374 TPACPI_MAIL); 3375 /* Fallback: pre-init for FN+F3,F4,F12 */ 3376 hotkey_all_mask = 0x080cU; 3377 } else { 3378 tp_features.hotkey_mask = 1; 3379 } 3380 break; 3381 3382 case 2: 3383 /* 3384 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3385 */ 3386 3387 /* Paranoia check AND init hotkey_all_mask */ 3388 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3389 "MHKA", "dd", 1)) { 3390 pr_err("missing MHKA handler, please report this to %s\n", 3391 TPACPI_MAIL); 3392 /* Fallback: pre-init for FN+F3,F4,F12 */ 3393 hotkey_all_mask = 0x080cU; 3394 } else { 3395 tp_features.hotkey_mask = 1; 3396 } 3397 3398 /* 3399 * Check if we have an adaptive keyboard, like on the 3400 * Lenovo Carbon X1 2014 (2nd Gen). 3401 */ 3402 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3403 "MHKA", "dd", 2)) { 3404 if (hotkey_adaptive_all_mask != 0) { 3405 tp_features.has_adaptive_kbd = true; 3406 res = sysfs_create_group( 3407 &tpacpi_pdev->dev.kobj, 3408 &adaptive_kbd_attr_group); 3409 if (res) 3410 goto err_exit; 3411 } 3412 } else { 3413 tp_features.has_adaptive_kbd = false; 3414 hotkey_adaptive_all_mask = 0x0U; 3415 } 3416 break; 3417 3418 default: 3419 pr_err("unknown version of the HKEY interface: 0x%x\n", 3420 hkeyv); 3421 pr_err("please report this to %s\n", TPACPI_MAIL); 3422 break; 3423 } 3424 } 3425 3426 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3427 "hotkey masks are %s\n", 3428 str_supported(tp_features.hotkey_mask)); 3429 3430 /* Init hotkey_all_mask if not initialized yet */ 3431 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3432 (quirks & TPACPI_HK_Q_INIMASK)) 3433 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3434 3435 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3436 if (tp_features.hotkey_mask) { 3437 /* hotkey_source_mask *must* be zero for 3438 * the first hotkey_mask_get to return hotkey_orig_mask */ 3439 res = hotkey_mask_get(); 3440 if (res) 3441 goto err_exit; 3442 3443 hotkey_orig_mask = hotkey_acpi_mask; 3444 } else { 3445 hotkey_orig_mask = hotkey_all_mask; 3446 hotkey_acpi_mask = hotkey_all_mask; 3447 } 3448 3449 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3450 if (dbg_wlswemul) { 3451 tp_features.hotkey_wlsw = 1; 3452 radiosw_state = !!tpacpi_wlsw_emulstate; 3453 pr_info("radio switch emulation enabled\n"); 3454 } else 3455 #endif 3456 /* Not all thinkpads have a hardware radio switch */ 3457 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3458 tp_features.hotkey_wlsw = 1; 3459 radiosw_state = !!status; 3460 pr_info("radio switch found; radios are %s\n", 3461 enabled(status, 0)); 3462 } 3463 if (tp_features.hotkey_wlsw) 3464 res = add_to_attr_set(hotkey_dev_attributes, 3465 &dev_attr_hotkey_radio_sw.attr); 3466 3467 /* For X41t, X60t, X61t Tablets... */ 3468 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3469 tp_features.hotkey_tablet = 1; 3470 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); 3471 pr_info("possible tablet mode switch found; " 3472 "ThinkPad in %s mode\n", 3473 (tabletsw_state) ? "tablet" : "laptop"); 3474 res = add_to_attr_set(hotkey_dev_attributes, 3475 &dev_attr_hotkey_tablet_mode.attr); 3476 } 3477 3478 if (!res) 3479 res = register_attr_set_with_sysfs( 3480 hotkey_dev_attributes, 3481 &tpacpi_pdev->dev.kobj); 3482 if (res) 3483 goto err_exit; 3484 3485 /* Set up key map */ 3486 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3487 GFP_KERNEL); 3488 if (!hotkey_keycode_map) { 3489 pr_err("failed to allocate memory for key map\n"); 3490 res = -ENOMEM; 3491 goto err_exit; 3492 } 3493 3494 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3495 ARRAY_SIZE(tpacpi_keymap_qtable)); 3496 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3497 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3498 "using keymap number %lu\n", keymap_id); 3499 3500 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3501 TPACPI_HOTKEY_MAP_SIZE); 3502 3503 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3504 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3505 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3506 tpacpi_inputdev->keycode = hotkey_keycode_map; 3507 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3508 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3509 input_set_capability(tpacpi_inputdev, EV_KEY, 3510 hotkey_keycode_map[i]); 3511 } else { 3512 if (i < sizeof(hotkey_reserved_mask)*8) 3513 hotkey_reserved_mask |= 1 << i; 3514 } 3515 } 3516 3517 if (tp_features.hotkey_wlsw) { 3518 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3519 input_report_switch(tpacpi_inputdev, 3520 SW_RFKILL_ALL, radiosw_state); 3521 } 3522 if (tp_features.hotkey_tablet) { 3523 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3524 input_report_switch(tpacpi_inputdev, 3525 SW_TABLET_MODE, tabletsw_state); 3526 } 3527 3528 /* Do not issue duplicate brightness change events to 3529 * userspace. tpacpi_detect_brightness_capabilities() must have 3530 * been called before this point */ 3531 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3532 pr_info("This ThinkPad has standard ACPI backlight " 3533 "brightness control, supported by the ACPI " 3534 "video driver\n"); 3535 pr_notice("Disabling thinkpad-acpi brightness events " 3536 "by default...\n"); 3537 3538 /* Disable brightness up/down on Lenovo thinkpads when 3539 * ACPI is handling them, otherwise it is plain impossible 3540 * for userspace to do something even remotely sane */ 3541 hotkey_reserved_mask |= 3542 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3543 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3544 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3545 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3546 } 3547 3548 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3549 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3550 & ~hotkey_all_mask 3551 & ~hotkey_reserved_mask; 3552 3553 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3554 "hotkey source mask 0x%08x, polling freq %u\n", 3555 hotkey_source_mask, hotkey_poll_freq); 3556 #endif 3557 3558 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3559 "enabling firmware HKEY event interface...\n"); 3560 res = hotkey_status_set(true); 3561 if (res) { 3562 hotkey_exit(); 3563 return res; 3564 } 3565 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3566 | hotkey_driver_mask) 3567 & ~hotkey_source_mask); 3568 if (res < 0 && res != -ENXIO) { 3569 hotkey_exit(); 3570 return res; 3571 } 3572 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3573 & ~hotkey_reserved_mask; 3574 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3575 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3576 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3577 3578 tpacpi_inputdev->open = &hotkey_inputdev_open; 3579 tpacpi_inputdev->close = &hotkey_inputdev_close; 3580 3581 hotkey_poll_setup_safe(true); 3582 3583 return 0; 3584 3585 err_exit: 3586 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3587 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3588 &adaptive_kbd_attr_group); 3589 3590 hotkey_dev_attributes = NULL; 3591 3592 return (res < 0) ? res : 1; 3593 } 3594 3595 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3596 * mode, Web conference mode, Function mode and Lay-flat mode. 3597 * We support Home mode and Function mode currently. 3598 * 3599 * Will consider support rest of modes in future. 3600 * 3601 */ 3602 static const int adaptive_keyboard_modes[] = { 3603 HOME_MODE, 3604 /* WEB_BROWSER_MODE = 2, 3605 WEB_CONFERENCE_MODE = 3, */ 3606 FUNCTION_MODE 3607 }; 3608 3609 #define DFR_CHANGE_ROW 0x101 3610 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3611 #define FIRST_ADAPTIVE_KEY 0x103 3612 #define ADAPTIVE_KEY_OFFSET 0x020 3613 3614 /* press Fn key a while second, it will switch to Function Mode. Then 3615 * release Fn key, previous mode be restored. 3616 */ 3617 static bool adaptive_keyboard_mode_is_saved; 3618 static int adaptive_keyboard_prev_mode; 3619 3620 static int adaptive_keyboard_get_mode(void) 3621 { 3622 int mode = 0; 3623 3624 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3625 pr_err("Cannot read adaptive keyboard mode\n"); 3626 return -EIO; 3627 } 3628 3629 return mode; 3630 } 3631 3632 static int adaptive_keyboard_set_mode(int new_mode) 3633 { 3634 if (new_mode < 0 || 3635 new_mode > LAYFLAT_MODE) 3636 return -EINVAL; 3637 3638 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3639 pr_err("Cannot set adaptive keyboard mode\n"); 3640 return -EIO; 3641 } 3642 3643 return 0; 3644 } 3645 3646 static int adaptive_keyboard_get_next_mode(int mode) 3647 { 3648 size_t i; 3649 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3650 3651 for (i = 0; i <= max_mode; i++) { 3652 if (adaptive_keyboard_modes[i] == mode) 3653 break; 3654 } 3655 3656 if (i >= max_mode) 3657 i = 0; 3658 else 3659 i++; 3660 3661 return adaptive_keyboard_modes[i]; 3662 } 3663 3664 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3665 { 3666 int current_mode = 0; 3667 int new_mode = 0; 3668 int keycode; 3669 3670 switch (scancode) { 3671 case DFR_CHANGE_ROW: 3672 if (adaptive_keyboard_mode_is_saved) { 3673 new_mode = adaptive_keyboard_prev_mode; 3674 adaptive_keyboard_mode_is_saved = false; 3675 } else { 3676 current_mode = adaptive_keyboard_get_mode(); 3677 if (current_mode < 0) 3678 return false; 3679 new_mode = adaptive_keyboard_get_next_mode( 3680 current_mode); 3681 } 3682 3683 if (adaptive_keyboard_set_mode(new_mode) < 0) 3684 return false; 3685 3686 return true; 3687 3688 case DFR_SHOW_QUICKVIEW_ROW: 3689 current_mode = adaptive_keyboard_get_mode(); 3690 if (current_mode < 0) 3691 return false; 3692 3693 adaptive_keyboard_prev_mode = current_mode; 3694 adaptive_keyboard_mode_is_saved = true; 3695 3696 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3697 return false; 3698 return true; 3699 3700 default: 3701 if (scancode < FIRST_ADAPTIVE_KEY || 3702 scancode >= FIRST_ADAPTIVE_KEY + TPACPI_HOTKEY_MAP_LEN - 3703 ADAPTIVE_KEY_OFFSET) { 3704 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3705 scancode); 3706 return false; 3707 } 3708 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + ADAPTIVE_KEY_OFFSET]; 3709 if (keycode != KEY_RESERVED) { 3710 mutex_lock(&tpacpi_inputdev_send_mutex); 3711 3712 input_report_key(tpacpi_inputdev, keycode, 1); 3713 input_sync(tpacpi_inputdev); 3714 3715 input_report_key(tpacpi_inputdev, keycode, 0); 3716 input_sync(tpacpi_inputdev); 3717 3718 mutex_unlock(&tpacpi_inputdev_send_mutex); 3719 } 3720 return true; 3721 } 3722 } 3723 3724 static bool hotkey_notify_hotkey(const u32 hkey, 3725 bool *send_acpi_ev, 3726 bool *ignore_acpi_ev) 3727 { 3728 /* 0x1000-0x1FFF: key presses */ 3729 unsigned int scancode = hkey & 0xfff; 3730 *send_acpi_ev = true; 3731 *ignore_acpi_ev = false; 3732 3733 /* HKEY event 0x1001 is scancode 0x00 */ 3734 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3735 scancode--; 3736 if (!(hotkey_source_mask & (1 << scancode))) { 3737 tpacpi_input_send_key_masked(scancode); 3738 *send_acpi_ev = false; 3739 } else { 3740 *ignore_acpi_ev = true; 3741 } 3742 return true; 3743 } else { 3744 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3745 } 3746 return false; 3747 } 3748 3749 static bool hotkey_notify_wakeup(const u32 hkey, 3750 bool *send_acpi_ev, 3751 bool *ignore_acpi_ev) 3752 { 3753 /* 0x2000-0x2FFF: Wakeup reason */ 3754 *send_acpi_ev = true; 3755 *ignore_acpi_ev = false; 3756 3757 switch (hkey) { 3758 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3759 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3760 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3761 *ignore_acpi_ev = true; 3762 break; 3763 3764 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3765 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3766 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3767 *ignore_acpi_ev = true; 3768 break; 3769 3770 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3771 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3772 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3773 /* how to auto-heal: */ 3774 /* 2313: woke up from S3, go to S4/S5 */ 3775 /* 2413: woke up from S4, go to S5 */ 3776 break; 3777 3778 default: 3779 return false; 3780 } 3781 3782 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3783 pr_info("woke up due to a hot-unplug request...\n"); 3784 hotkey_wakeup_reason_notify_change(); 3785 } 3786 return true; 3787 } 3788 3789 static bool hotkey_notify_dockevent(const u32 hkey, 3790 bool *send_acpi_ev, 3791 bool *ignore_acpi_ev) 3792 { 3793 /* 0x4000-0x4FFF: dock-related events */ 3794 *send_acpi_ev = true; 3795 *ignore_acpi_ev = false; 3796 3797 switch (hkey) { 3798 case TP_HKEY_EV_UNDOCK_ACK: 3799 /* ACPI undock operation completed after wakeup */ 3800 hotkey_autosleep_ack = 1; 3801 pr_info("undocked\n"); 3802 hotkey_wakeup_hotunplug_complete_notify_change(); 3803 return true; 3804 3805 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3806 pr_info("docked into hotplug port replicator\n"); 3807 return true; 3808 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3809 pr_info("undocked from hotplug port replicator\n"); 3810 return true; 3811 3812 default: 3813 return false; 3814 } 3815 } 3816 3817 static bool hotkey_notify_usrevent(const u32 hkey, 3818 bool *send_acpi_ev, 3819 bool *ignore_acpi_ev) 3820 { 3821 /* 0x5000-0x5FFF: human interface helpers */ 3822 *send_acpi_ev = true; 3823 *ignore_acpi_ev = false; 3824 3825 switch (hkey) { 3826 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3827 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3828 return true; 3829 3830 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3831 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3832 tpacpi_input_send_tabletsw(); 3833 hotkey_tablet_mode_notify_change(); 3834 *send_acpi_ev = false; 3835 return true; 3836 3837 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3838 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3839 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3840 /* do not propagate these events */ 3841 *ignore_acpi_ev = true; 3842 return true; 3843 3844 default: 3845 return false; 3846 } 3847 } 3848 3849 static void thermal_dump_all_sensors(void); 3850 3851 static bool hotkey_notify_6xxx(const u32 hkey, 3852 bool *send_acpi_ev, 3853 bool *ignore_acpi_ev) 3854 { 3855 bool known = true; 3856 3857 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 3858 *send_acpi_ev = true; 3859 *ignore_acpi_ev = false; 3860 3861 switch (hkey) { 3862 case TP_HKEY_EV_THM_TABLE_CHANGED: 3863 pr_info("EC reports that Thermal Table has changed\n"); 3864 /* recommended action: do nothing, we don't have 3865 * Lenovo ATM information */ 3866 return true; 3867 case TP_HKEY_EV_ALARM_BAT_HOT: 3868 pr_crit("THERMAL ALARM: battery is too hot!\n"); 3869 /* recommended action: warn user through gui */ 3870 break; 3871 case TP_HKEY_EV_ALARM_BAT_XHOT: 3872 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 3873 /* recommended action: immediate sleep/hibernate */ 3874 break; 3875 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3876 pr_crit("THERMAL ALARM: " 3877 "a sensor reports something is too hot!\n"); 3878 /* recommended action: warn user through gui, that */ 3879 /* some internal component is too hot */ 3880 break; 3881 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3882 pr_alert("THERMAL EMERGENCY: " 3883 "a sensor reports something is extremely hot!\n"); 3884 /* recommended action: immediate sleep/hibernate */ 3885 break; 3886 case TP_HKEY_EV_AC_CHANGED: 3887 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 3888 * AC status changed; can be triggered by plugging or 3889 * unplugging AC adapter, docking or undocking. */ 3890 3891 /* fallthrough */ 3892 3893 case TP_HKEY_EV_KEY_NUMLOCK: 3894 case TP_HKEY_EV_KEY_FN: 3895 case TP_HKEY_EV_KEY_FN_ESC: 3896 /* key press events, we just ignore them as long as the EC 3897 * is still reporting them in the normal keyboard stream */ 3898 *send_acpi_ev = false; 3899 *ignore_acpi_ev = true; 3900 return true; 3901 3902 default: 3903 pr_warn("unknown possible thermal alarm or keyboard event received\n"); 3904 known = false; 3905 } 3906 3907 thermal_dump_all_sensors(); 3908 3909 return known; 3910 } 3911 3912 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3913 { 3914 u32 hkey; 3915 bool send_acpi_ev; 3916 bool ignore_acpi_ev; 3917 bool known_ev; 3918 3919 if (event != 0x80) { 3920 pr_err("unknown HKEY notification event %d\n", event); 3921 /* forward it to userspace, maybe it knows how to handle it */ 3922 acpi_bus_generate_netlink_event( 3923 ibm->acpi->device->pnp.device_class, 3924 dev_name(&ibm->acpi->device->dev), 3925 event, 0); 3926 return; 3927 } 3928 3929 while (1) { 3930 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3931 pr_err("failed to retrieve HKEY event\n"); 3932 return; 3933 } 3934 3935 if (hkey == 0) { 3936 /* queue empty */ 3937 return; 3938 } 3939 3940 send_acpi_ev = true; 3941 ignore_acpi_ev = false; 3942 3943 switch (hkey >> 12) { 3944 case 1: 3945 /* 0x1000-0x1FFF: key presses */ 3946 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3947 &ignore_acpi_ev); 3948 break; 3949 case 2: 3950 /* 0x2000-0x2FFF: Wakeup reason */ 3951 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3952 &ignore_acpi_ev); 3953 break; 3954 case 3: 3955 /* 0x3000-0x3FFF: bay-related wakeups */ 3956 switch (hkey) { 3957 case TP_HKEY_EV_BAYEJ_ACK: 3958 hotkey_autosleep_ack = 1; 3959 pr_info("bay ejected\n"); 3960 hotkey_wakeup_hotunplug_complete_notify_change(); 3961 known_ev = true; 3962 break; 3963 case TP_HKEY_EV_OPTDRV_EJ: 3964 /* FIXME: kick libata if SATA link offline */ 3965 known_ev = true; 3966 break; 3967 default: 3968 known_ev = false; 3969 } 3970 break; 3971 case 4: 3972 /* 0x4000-0x4FFF: dock-related events */ 3973 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 3974 &ignore_acpi_ev); 3975 break; 3976 case 5: 3977 /* 0x5000-0x5FFF: human interface helpers */ 3978 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3979 &ignore_acpi_ev); 3980 break; 3981 case 6: 3982 /* 0x6000-0x6FFF: thermal alarms/notices and 3983 * keyboard events */ 3984 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 3985 &ignore_acpi_ev); 3986 break; 3987 case 7: 3988 /* 0x7000-0x7FFF: misc */ 3989 if (tp_features.hotkey_wlsw && 3990 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3991 tpacpi_send_radiosw_update(); 3992 send_acpi_ev = 0; 3993 known_ev = true; 3994 break; 3995 } 3996 /* fallthrough to default */ 3997 default: 3998 known_ev = false; 3999 } 4000 if (!known_ev) { 4001 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4002 pr_notice("please report the conditions when this " 4003 "event happened to %s\n", TPACPI_MAIL); 4004 } 4005 4006 /* netlink events */ 4007 if (!ignore_acpi_ev && send_acpi_ev) { 4008 acpi_bus_generate_netlink_event( 4009 ibm->acpi->device->pnp.device_class, 4010 dev_name(&ibm->acpi->device->dev), 4011 event, hkey); 4012 } 4013 } 4014 } 4015 4016 static void hotkey_suspend(void) 4017 { 4018 /* Do these on suspend, we get the events on early resume! */ 4019 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4020 hotkey_autosleep_ack = 0; 4021 4022 /* save previous mode of adaptive keyboard of X1 Carbon */ 4023 if (tp_features.has_adaptive_kbd) { 4024 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4025 "GTRW", "dd", 0)) { 4026 pr_err("Cannot read adaptive keyboard mode.\n"); 4027 } 4028 } 4029 } 4030 4031 static void hotkey_resume(void) 4032 { 4033 tpacpi_disable_brightness_delay(); 4034 4035 if (hotkey_status_set(true) < 0 || 4036 hotkey_mask_set(hotkey_acpi_mask) < 0) 4037 pr_err("error while attempting to reset the event " 4038 "firmware interface\n"); 4039 4040 tpacpi_send_radiosw_update(); 4041 hotkey_tablet_mode_notify_change(); 4042 hotkey_wakeup_reason_notify_change(); 4043 hotkey_wakeup_hotunplug_complete_notify_change(); 4044 hotkey_poll_setup_safe(false); 4045 4046 /* restore previous mode of adapive keyboard of X1 Carbon */ 4047 if (tp_features.has_adaptive_kbd) { 4048 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4049 adaptive_keyboard_prev_mode)) { 4050 pr_err("Cannot set adaptive keyboard mode.\n"); 4051 } 4052 } 4053 } 4054 4055 /* procfs -------------------------------------------------------------- */ 4056 static int hotkey_read(struct seq_file *m) 4057 { 4058 int res, status; 4059 4060 if (!tp_features.hotkey) { 4061 seq_printf(m, "status:\t\tnot supported\n"); 4062 return 0; 4063 } 4064 4065 if (mutex_lock_killable(&hotkey_mutex)) 4066 return -ERESTARTSYS; 4067 res = hotkey_status_get(&status); 4068 if (!res) 4069 res = hotkey_mask_get(); 4070 mutex_unlock(&hotkey_mutex); 4071 if (res) 4072 return res; 4073 4074 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4075 if (hotkey_all_mask) { 4076 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4077 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4078 } else { 4079 seq_printf(m, "mask:\t\tnot supported\n"); 4080 seq_printf(m, "commands:\tenable, disable, reset\n"); 4081 } 4082 4083 return 0; 4084 } 4085 4086 static void hotkey_enabledisable_warn(bool enable) 4087 { 4088 tpacpi_log_usertask("procfs hotkey enable/disable"); 4089 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4090 pr_fmt("hotkey enable/disable functionality has been " 4091 "removed from the driver. " 4092 "Hotkeys are always enabled.\n"))) 4093 pr_err("Please remove the hotkey=enable module " 4094 "parameter, it is deprecated. " 4095 "Hotkeys are always enabled.\n"); 4096 } 4097 4098 static int hotkey_write(char *buf) 4099 { 4100 int res; 4101 u32 mask; 4102 char *cmd; 4103 4104 if (!tp_features.hotkey) 4105 return -ENODEV; 4106 4107 if (mutex_lock_killable(&hotkey_mutex)) 4108 return -ERESTARTSYS; 4109 4110 mask = hotkey_user_mask; 4111 4112 res = 0; 4113 while ((cmd = next_cmd(&buf))) { 4114 if (strlencmp(cmd, "enable") == 0) { 4115 hotkey_enabledisable_warn(1); 4116 } else if (strlencmp(cmd, "disable") == 0) { 4117 hotkey_enabledisable_warn(0); 4118 res = -EPERM; 4119 } else if (strlencmp(cmd, "reset") == 0) { 4120 mask = (hotkey_all_mask | hotkey_source_mask) 4121 & ~hotkey_reserved_mask; 4122 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4123 /* mask set */ 4124 } else if (sscanf(cmd, "%x", &mask) == 1) { 4125 /* mask set */ 4126 } else { 4127 res = -EINVAL; 4128 goto errexit; 4129 } 4130 } 4131 4132 if (!res) { 4133 tpacpi_disclose_usertask("procfs hotkey", 4134 "set mask to 0x%08x\n", mask); 4135 res = hotkey_user_mask_set(mask); 4136 } 4137 4138 errexit: 4139 mutex_unlock(&hotkey_mutex); 4140 return res; 4141 } 4142 4143 static const struct acpi_device_id ibm_htk_device_ids[] = { 4144 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4145 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4146 {"", 0}, 4147 }; 4148 4149 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4150 .hid = ibm_htk_device_ids, 4151 .notify = hotkey_notify, 4152 .handle = &hkey_handle, 4153 .type = ACPI_DEVICE_NOTIFY, 4154 }; 4155 4156 static struct ibm_struct hotkey_driver_data = { 4157 .name = "hotkey", 4158 .read = hotkey_read, 4159 .write = hotkey_write, 4160 .exit = hotkey_exit, 4161 .resume = hotkey_resume, 4162 .suspend = hotkey_suspend, 4163 .acpi = &ibm_hotkey_acpidriver, 4164 }; 4165 4166 /************************************************************************* 4167 * Bluetooth subdriver 4168 */ 4169 4170 enum { 4171 /* ACPI GBDC/SBDC bits */ 4172 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4173 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4174 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4175 0 = disable, 1 = enable */ 4176 }; 4177 4178 enum { 4179 /* ACPI \BLTH commands */ 4180 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4181 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4182 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4183 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4184 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4185 }; 4186 4187 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4188 4189 static int bluetooth_get_status(void) 4190 { 4191 int status; 4192 4193 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4194 if (dbg_bluetoothemul) 4195 return (tpacpi_bluetooth_emulstate) ? 4196 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4197 #endif 4198 4199 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4200 return -EIO; 4201 4202 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4203 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4204 } 4205 4206 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4207 { 4208 int status; 4209 4210 vdbg_printk(TPACPI_DBG_RFKILL, 4211 "will attempt to %s bluetooth\n", 4212 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4213 4214 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4215 if (dbg_bluetoothemul) { 4216 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4217 return 0; 4218 } 4219 #endif 4220 4221 if (state == TPACPI_RFK_RADIO_ON) 4222 status = TP_ACPI_BLUETOOTH_RADIOSSW 4223 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4224 else 4225 status = 0; 4226 4227 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4228 return -EIO; 4229 4230 return 0; 4231 } 4232 4233 /* sysfs bluetooth enable ---------------------------------------------- */ 4234 static ssize_t bluetooth_enable_show(struct device *dev, 4235 struct device_attribute *attr, 4236 char *buf) 4237 { 4238 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4239 attr, buf); 4240 } 4241 4242 static ssize_t bluetooth_enable_store(struct device *dev, 4243 struct device_attribute *attr, 4244 const char *buf, size_t count) 4245 { 4246 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4247 attr, buf, count); 4248 } 4249 4250 static DEVICE_ATTR_RW(bluetooth_enable); 4251 4252 /* --------------------------------------------------------------------- */ 4253 4254 static struct attribute *bluetooth_attributes[] = { 4255 &dev_attr_bluetooth_enable.attr, 4256 NULL 4257 }; 4258 4259 static const struct attribute_group bluetooth_attr_group = { 4260 .attrs = bluetooth_attributes, 4261 }; 4262 4263 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4264 .get_status = bluetooth_get_status, 4265 .set_status = bluetooth_set_status, 4266 }; 4267 4268 static void bluetooth_shutdown(void) 4269 { 4270 /* Order firmware to save current state to NVRAM */ 4271 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4272 TP_ACPI_BLTH_SAVE_STATE)) 4273 pr_notice("failed to save bluetooth state to NVRAM\n"); 4274 else 4275 vdbg_printk(TPACPI_DBG_RFKILL, 4276 "bluetooth state saved to NVRAM\n"); 4277 } 4278 4279 static void bluetooth_exit(void) 4280 { 4281 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4282 &bluetooth_attr_group); 4283 4284 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4285 4286 bluetooth_shutdown(); 4287 } 4288 4289 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4290 { 4291 int res; 4292 int status = 0; 4293 4294 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4295 "initializing bluetooth subdriver\n"); 4296 4297 TPACPI_ACPIHANDLE_INIT(hkey); 4298 4299 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4300 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4301 tp_features.bluetooth = hkey_handle && 4302 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4303 4304 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4305 "bluetooth is %s, status 0x%02x\n", 4306 str_supported(tp_features.bluetooth), 4307 status); 4308 4309 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4310 if (dbg_bluetoothemul) { 4311 tp_features.bluetooth = 1; 4312 pr_info("bluetooth switch emulation enabled\n"); 4313 } else 4314 #endif 4315 if (tp_features.bluetooth && 4316 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4317 /* no bluetooth hardware present in system */ 4318 tp_features.bluetooth = 0; 4319 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4320 "bluetooth hardware not installed\n"); 4321 } 4322 4323 if (!tp_features.bluetooth) 4324 return 1; 4325 4326 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4327 &bluetooth_tprfk_ops, 4328 RFKILL_TYPE_BLUETOOTH, 4329 TPACPI_RFK_BLUETOOTH_SW_NAME, 4330 true); 4331 if (res) 4332 return res; 4333 4334 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4335 &bluetooth_attr_group); 4336 if (res) { 4337 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4338 return res; 4339 } 4340 4341 return 0; 4342 } 4343 4344 /* procfs -------------------------------------------------------------- */ 4345 static int bluetooth_read(struct seq_file *m) 4346 { 4347 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4348 } 4349 4350 static int bluetooth_write(char *buf) 4351 { 4352 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4353 } 4354 4355 static struct ibm_struct bluetooth_driver_data = { 4356 .name = "bluetooth", 4357 .read = bluetooth_read, 4358 .write = bluetooth_write, 4359 .exit = bluetooth_exit, 4360 .shutdown = bluetooth_shutdown, 4361 }; 4362 4363 /************************************************************************* 4364 * Wan subdriver 4365 */ 4366 4367 enum { 4368 /* ACPI GWAN/SWAN bits */ 4369 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4370 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4371 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4372 0 = disable, 1 = enable */ 4373 }; 4374 4375 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4376 4377 static int wan_get_status(void) 4378 { 4379 int status; 4380 4381 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4382 if (dbg_wwanemul) 4383 return (tpacpi_wwan_emulstate) ? 4384 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4385 #endif 4386 4387 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4388 return -EIO; 4389 4390 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4391 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4392 } 4393 4394 static int wan_set_status(enum tpacpi_rfkill_state state) 4395 { 4396 int status; 4397 4398 vdbg_printk(TPACPI_DBG_RFKILL, 4399 "will attempt to %s wwan\n", 4400 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4401 4402 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4403 if (dbg_wwanemul) { 4404 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4405 return 0; 4406 } 4407 #endif 4408 4409 if (state == TPACPI_RFK_RADIO_ON) 4410 status = TP_ACPI_WANCARD_RADIOSSW 4411 | TP_ACPI_WANCARD_RESUMECTRL; 4412 else 4413 status = 0; 4414 4415 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4416 return -EIO; 4417 4418 return 0; 4419 } 4420 4421 /* sysfs wan enable ---------------------------------------------------- */ 4422 static ssize_t wan_enable_show(struct device *dev, 4423 struct device_attribute *attr, 4424 char *buf) 4425 { 4426 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4427 attr, buf); 4428 } 4429 4430 static ssize_t wan_enable_store(struct device *dev, 4431 struct device_attribute *attr, 4432 const char *buf, size_t count) 4433 { 4434 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4435 attr, buf, count); 4436 } 4437 4438 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4439 wan_enable_show, wan_enable_store); 4440 4441 /* --------------------------------------------------------------------- */ 4442 4443 static struct attribute *wan_attributes[] = { 4444 &dev_attr_wwan_enable.attr, 4445 NULL 4446 }; 4447 4448 static const struct attribute_group wan_attr_group = { 4449 .attrs = wan_attributes, 4450 }; 4451 4452 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4453 .get_status = wan_get_status, 4454 .set_status = wan_set_status, 4455 }; 4456 4457 static void wan_shutdown(void) 4458 { 4459 /* Order firmware to save current state to NVRAM */ 4460 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4461 TP_ACPI_WGSV_SAVE_STATE)) 4462 pr_notice("failed to save WWAN state to NVRAM\n"); 4463 else 4464 vdbg_printk(TPACPI_DBG_RFKILL, 4465 "WWAN state saved to NVRAM\n"); 4466 } 4467 4468 static void wan_exit(void) 4469 { 4470 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4471 &wan_attr_group); 4472 4473 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4474 4475 wan_shutdown(); 4476 } 4477 4478 static int __init wan_init(struct ibm_init_struct *iibm) 4479 { 4480 int res; 4481 int status = 0; 4482 4483 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4484 "initializing wan subdriver\n"); 4485 4486 TPACPI_ACPIHANDLE_INIT(hkey); 4487 4488 tp_features.wan = hkey_handle && 4489 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4490 4491 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4492 "wan is %s, status 0x%02x\n", 4493 str_supported(tp_features.wan), 4494 status); 4495 4496 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4497 if (dbg_wwanemul) { 4498 tp_features.wan = 1; 4499 pr_info("wwan switch emulation enabled\n"); 4500 } else 4501 #endif 4502 if (tp_features.wan && 4503 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4504 /* no wan hardware present in system */ 4505 tp_features.wan = 0; 4506 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4507 "wan hardware not installed\n"); 4508 } 4509 4510 if (!tp_features.wan) 4511 return 1; 4512 4513 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4514 &wan_tprfk_ops, 4515 RFKILL_TYPE_WWAN, 4516 TPACPI_RFK_WWAN_SW_NAME, 4517 true); 4518 if (res) 4519 return res; 4520 4521 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4522 &wan_attr_group); 4523 4524 if (res) { 4525 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4526 return res; 4527 } 4528 4529 return 0; 4530 } 4531 4532 /* procfs -------------------------------------------------------------- */ 4533 static int wan_read(struct seq_file *m) 4534 { 4535 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4536 } 4537 4538 static int wan_write(char *buf) 4539 { 4540 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4541 } 4542 4543 static struct ibm_struct wan_driver_data = { 4544 .name = "wan", 4545 .read = wan_read, 4546 .write = wan_write, 4547 .exit = wan_exit, 4548 .shutdown = wan_shutdown, 4549 }; 4550 4551 /************************************************************************* 4552 * UWB subdriver 4553 */ 4554 4555 enum { 4556 /* ACPI GUWB/SUWB bits */ 4557 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4558 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4559 }; 4560 4561 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4562 4563 static int uwb_get_status(void) 4564 { 4565 int status; 4566 4567 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4568 if (dbg_uwbemul) 4569 return (tpacpi_uwb_emulstate) ? 4570 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4571 #endif 4572 4573 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4574 return -EIO; 4575 4576 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4577 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4578 } 4579 4580 static int uwb_set_status(enum tpacpi_rfkill_state state) 4581 { 4582 int status; 4583 4584 vdbg_printk(TPACPI_DBG_RFKILL, 4585 "will attempt to %s UWB\n", 4586 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4587 4588 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4589 if (dbg_uwbemul) { 4590 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4591 return 0; 4592 } 4593 #endif 4594 4595 if (state == TPACPI_RFK_RADIO_ON) 4596 status = TP_ACPI_UWB_RADIOSSW; 4597 else 4598 status = 0; 4599 4600 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4601 return -EIO; 4602 4603 return 0; 4604 } 4605 4606 /* --------------------------------------------------------------------- */ 4607 4608 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4609 .get_status = uwb_get_status, 4610 .set_status = uwb_set_status, 4611 }; 4612 4613 static void uwb_exit(void) 4614 { 4615 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4616 } 4617 4618 static int __init uwb_init(struct ibm_init_struct *iibm) 4619 { 4620 int res; 4621 int status = 0; 4622 4623 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4624 "initializing uwb subdriver\n"); 4625 4626 TPACPI_ACPIHANDLE_INIT(hkey); 4627 4628 tp_features.uwb = hkey_handle && 4629 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4630 4631 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4632 "uwb is %s, status 0x%02x\n", 4633 str_supported(tp_features.uwb), 4634 status); 4635 4636 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4637 if (dbg_uwbemul) { 4638 tp_features.uwb = 1; 4639 pr_info("uwb switch emulation enabled\n"); 4640 } else 4641 #endif 4642 if (tp_features.uwb && 4643 !(status & TP_ACPI_UWB_HWPRESENT)) { 4644 /* no uwb hardware present in system */ 4645 tp_features.uwb = 0; 4646 dbg_printk(TPACPI_DBG_INIT, 4647 "uwb hardware not installed\n"); 4648 } 4649 4650 if (!tp_features.uwb) 4651 return 1; 4652 4653 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4654 &uwb_tprfk_ops, 4655 RFKILL_TYPE_UWB, 4656 TPACPI_RFK_UWB_SW_NAME, 4657 false); 4658 return res; 4659 } 4660 4661 static struct ibm_struct uwb_driver_data = { 4662 .name = "uwb", 4663 .exit = uwb_exit, 4664 .flags.experimental = 1, 4665 }; 4666 4667 /************************************************************************* 4668 * Video subdriver 4669 */ 4670 4671 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4672 4673 enum video_access_mode { 4674 TPACPI_VIDEO_NONE = 0, 4675 TPACPI_VIDEO_570, /* 570 */ 4676 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4677 TPACPI_VIDEO_NEW, /* all others */ 4678 }; 4679 4680 enum { /* video status flags, based on VIDEO_570 */ 4681 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4682 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4683 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4684 }; 4685 4686 enum { /* TPACPI_VIDEO_570 constants */ 4687 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4688 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4689 * video_status_flags */ 4690 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4691 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4692 }; 4693 4694 static enum video_access_mode video_supported; 4695 static int video_orig_autosw; 4696 4697 static int video_autosw_get(void); 4698 static int video_autosw_set(int enable); 4699 4700 TPACPI_HANDLE(vid, root, 4701 "\\_SB.PCI.AGP.VGA", /* 570 */ 4702 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4703 "\\_SB.PCI0.VID0", /* 770e */ 4704 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4705 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4706 "\\_SB.PCI0.AGP.VID", /* all others */ 4707 ); /* R30, R31 */ 4708 4709 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4710 4711 static int __init video_init(struct ibm_init_struct *iibm) 4712 { 4713 int ivga; 4714 4715 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4716 4717 TPACPI_ACPIHANDLE_INIT(vid); 4718 if (tpacpi_is_ibm()) 4719 TPACPI_ACPIHANDLE_INIT(vid2); 4720 4721 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4722 /* G41, assume IVGA doesn't change */ 4723 vid_handle = vid2_handle; 4724 4725 if (!vid_handle) 4726 /* video switching not supported on R30, R31 */ 4727 video_supported = TPACPI_VIDEO_NONE; 4728 else if (tpacpi_is_ibm() && 4729 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4730 /* 570 */ 4731 video_supported = TPACPI_VIDEO_570; 4732 else if (tpacpi_is_ibm() && 4733 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4734 /* 600e/x, 770e, 770x */ 4735 video_supported = TPACPI_VIDEO_770; 4736 else 4737 /* all others */ 4738 video_supported = TPACPI_VIDEO_NEW; 4739 4740 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4741 str_supported(video_supported != TPACPI_VIDEO_NONE), 4742 video_supported); 4743 4744 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 4745 } 4746 4747 static void video_exit(void) 4748 { 4749 dbg_printk(TPACPI_DBG_EXIT, 4750 "restoring original video autoswitch mode\n"); 4751 if (video_autosw_set(video_orig_autosw)) 4752 pr_err("error while trying to restore original " 4753 "video autoswitch mode\n"); 4754 } 4755 4756 static int video_outputsw_get(void) 4757 { 4758 int status = 0; 4759 int i; 4760 4761 switch (video_supported) { 4762 case TPACPI_VIDEO_570: 4763 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4764 TP_ACPI_VIDEO_570_PHSCMD)) 4765 return -EIO; 4766 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4767 break; 4768 case TPACPI_VIDEO_770: 4769 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4770 return -EIO; 4771 if (i) 4772 status |= TP_ACPI_VIDEO_S_LCD; 4773 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4774 return -EIO; 4775 if (i) 4776 status |= TP_ACPI_VIDEO_S_CRT; 4777 break; 4778 case TPACPI_VIDEO_NEW: 4779 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4780 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4781 return -EIO; 4782 if (i) 4783 status |= TP_ACPI_VIDEO_S_CRT; 4784 4785 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4786 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4787 return -EIO; 4788 if (i) 4789 status |= TP_ACPI_VIDEO_S_LCD; 4790 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4791 return -EIO; 4792 if (i) 4793 status |= TP_ACPI_VIDEO_S_DVI; 4794 break; 4795 default: 4796 return -ENOSYS; 4797 } 4798 4799 return status; 4800 } 4801 4802 static int video_outputsw_set(int status) 4803 { 4804 int autosw; 4805 int res = 0; 4806 4807 switch (video_supported) { 4808 case TPACPI_VIDEO_570: 4809 res = acpi_evalf(NULL, NULL, 4810 "\\_SB.PHS2", "vdd", 4811 TP_ACPI_VIDEO_570_PHS2CMD, 4812 status | TP_ACPI_VIDEO_570_PHS2SET); 4813 break; 4814 case TPACPI_VIDEO_770: 4815 autosw = video_autosw_get(); 4816 if (autosw < 0) 4817 return autosw; 4818 4819 res = video_autosw_set(1); 4820 if (res) 4821 return res; 4822 res = acpi_evalf(vid_handle, NULL, 4823 "ASWT", "vdd", status * 0x100, 0); 4824 if (!autosw && video_autosw_set(autosw)) { 4825 pr_err("video auto-switch left enabled due to error\n"); 4826 return -EIO; 4827 } 4828 break; 4829 case TPACPI_VIDEO_NEW: 4830 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4831 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4832 break; 4833 default: 4834 return -ENOSYS; 4835 } 4836 4837 return (res) ? 0 : -EIO; 4838 } 4839 4840 static int video_autosw_get(void) 4841 { 4842 int autosw = 0; 4843 4844 switch (video_supported) { 4845 case TPACPI_VIDEO_570: 4846 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4847 return -EIO; 4848 break; 4849 case TPACPI_VIDEO_770: 4850 case TPACPI_VIDEO_NEW: 4851 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4852 return -EIO; 4853 break; 4854 default: 4855 return -ENOSYS; 4856 } 4857 4858 return autosw & 1; 4859 } 4860 4861 static int video_autosw_set(int enable) 4862 { 4863 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 4864 return -EIO; 4865 return 0; 4866 } 4867 4868 static int video_outputsw_cycle(void) 4869 { 4870 int autosw = video_autosw_get(); 4871 int res; 4872 4873 if (autosw < 0) 4874 return autosw; 4875 4876 switch (video_supported) { 4877 case TPACPI_VIDEO_570: 4878 res = video_autosw_set(1); 4879 if (res) 4880 return res; 4881 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4882 break; 4883 case TPACPI_VIDEO_770: 4884 case TPACPI_VIDEO_NEW: 4885 res = video_autosw_set(1); 4886 if (res) 4887 return res; 4888 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4889 break; 4890 default: 4891 return -ENOSYS; 4892 } 4893 if (!autosw && video_autosw_set(autosw)) { 4894 pr_err("video auto-switch left enabled due to error\n"); 4895 return -EIO; 4896 } 4897 4898 return (res) ? 0 : -EIO; 4899 } 4900 4901 static int video_expand_toggle(void) 4902 { 4903 switch (video_supported) { 4904 case TPACPI_VIDEO_570: 4905 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 4906 0 : -EIO; 4907 case TPACPI_VIDEO_770: 4908 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 4909 0 : -EIO; 4910 case TPACPI_VIDEO_NEW: 4911 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 4912 0 : -EIO; 4913 default: 4914 return -ENOSYS; 4915 } 4916 /* not reached */ 4917 } 4918 4919 static int video_read(struct seq_file *m) 4920 { 4921 int status, autosw; 4922 4923 if (video_supported == TPACPI_VIDEO_NONE) { 4924 seq_printf(m, "status:\t\tnot supported\n"); 4925 return 0; 4926 } 4927 4928 /* Even reads can crash X.org, so... */ 4929 if (!capable(CAP_SYS_ADMIN)) 4930 return -EPERM; 4931 4932 status = video_outputsw_get(); 4933 if (status < 0) 4934 return status; 4935 4936 autosw = video_autosw_get(); 4937 if (autosw < 0) 4938 return autosw; 4939 4940 seq_printf(m, "status:\t\tsupported\n"); 4941 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4942 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4943 if (video_supported == TPACPI_VIDEO_NEW) 4944 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 4945 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 4946 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 4947 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 4948 if (video_supported == TPACPI_VIDEO_NEW) 4949 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 4950 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 4951 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 4952 4953 return 0; 4954 } 4955 4956 static int video_write(char *buf) 4957 { 4958 char *cmd; 4959 int enable, disable, status; 4960 int res; 4961 4962 if (video_supported == TPACPI_VIDEO_NONE) 4963 return -ENODEV; 4964 4965 /* Even reads can crash X.org, let alone writes... */ 4966 if (!capable(CAP_SYS_ADMIN)) 4967 return -EPERM; 4968 4969 enable = 0; 4970 disable = 0; 4971 4972 while ((cmd = next_cmd(&buf))) { 4973 if (strlencmp(cmd, "lcd_enable") == 0) { 4974 enable |= TP_ACPI_VIDEO_S_LCD; 4975 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4976 disable |= TP_ACPI_VIDEO_S_LCD; 4977 } else if (strlencmp(cmd, "crt_enable") == 0) { 4978 enable |= TP_ACPI_VIDEO_S_CRT; 4979 } else if (strlencmp(cmd, "crt_disable") == 0) { 4980 disable |= TP_ACPI_VIDEO_S_CRT; 4981 } else if (video_supported == TPACPI_VIDEO_NEW && 4982 strlencmp(cmd, "dvi_enable") == 0) { 4983 enable |= TP_ACPI_VIDEO_S_DVI; 4984 } else if (video_supported == TPACPI_VIDEO_NEW && 4985 strlencmp(cmd, "dvi_disable") == 0) { 4986 disable |= TP_ACPI_VIDEO_S_DVI; 4987 } else if (strlencmp(cmd, "auto_enable") == 0) { 4988 res = video_autosw_set(1); 4989 if (res) 4990 return res; 4991 } else if (strlencmp(cmd, "auto_disable") == 0) { 4992 res = video_autosw_set(0); 4993 if (res) 4994 return res; 4995 } else if (strlencmp(cmd, "video_switch") == 0) { 4996 res = video_outputsw_cycle(); 4997 if (res) 4998 return res; 4999 } else if (strlencmp(cmd, "expand_toggle") == 0) { 5000 res = video_expand_toggle(); 5001 if (res) 5002 return res; 5003 } else 5004 return -EINVAL; 5005 } 5006 5007 if (enable || disable) { 5008 status = video_outputsw_get(); 5009 if (status < 0) 5010 return status; 5011 res = video_outputsw_set((status & ~disable) | enable); 5012 if (res) 5013 return res; 5014 } 5015 5016 return 0; 5017 } 5018 5019 static struct ibm_struct video_driver_data = { 5020 .name = "video", 5021 .read = video_read, 5022 .write = video_write, 5023 .exit = video_exit, 5024 }; 5025 5026 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5027 5028 /************************************************************************* 5029 * Keyboard backlight subdriver 5030 */ 5031 5032 static int kbdlight_set_level(int level) 5033 { 5034 if (!hkey_handle) 5035 return -ENXIO; 5036 5037 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5038 return -EIO; 5039 5040 return 0; 5041 } 5042 5043 static int kbdlight_set_level_and_update(int level); 5044 5045 static int kbdlight_get_level(void) 5046 { 5047 int status = 0; 5048 5049 if (!hkey_handle) 5050 return -ENXIO; 5051 5052 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5053 return -EIO; 5054 5055 if (status < 0) 5056 return status; 5057 5058 return status & 0x3; 5059 } 5060 5061 static bool kbdlight_is_supported(void) 5062 { 5063 int status = 0; 5064 5065 if (!hkey_handle) 5066 return false; 5067 5068 if (!acpi_has_method(hkey_handle, "MLCG")) { 5069 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5070 return false; 5071 } 5072 5073 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5074 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5075 return false; 5076 } 5077 5078 if (status < 0) { 5079 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5080 return false; 5081 } 5082 5083 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5084 /* 5085 * Guessed test for keyboard backlight: 5086 * 5087 * Machines with backlight keyboard return: 5088 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5089 * b110100010010000000XX - ThinkPad x230 5090 * b010100000010000000XX - ThinkPad x240 5091 * b010100000010000000XX - ThinkPad W541 5092 * (XX is current backlight level) 5093 * 5094 * Machines without backlight keyboard return: 5095 * b10100001000000000000 - ThinkPad x230 5096 * b10110001000000000000 - ThinkPad E430 5097 * b00000000000000000000 - ThinkPad E450 5098 * 5099 * Candidate BITs for detection test (XOR): 5100 * b01000000001000000000 5101 * ^ 5102 */ 5103 return status & BIT(9); 5104 } 5105 5106 static void kbdlight_set_worker(struct work_struct *work) 5107 { 5108 struct tpacpi_led_classdev *data = 5109 container_of(work, struct tpacpi_led_classdev, work); 5110 5111 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5112 kbdlight_set_level_and_update(data->new_state); 5113 } 5114 5115 static void kbdlight_sysfs_set(struct led_classdev *led_cdev, 5116 enum led_brightness brightness) 5117 { 5118 struct tpacpi_led_classdev *data = 5119 container_of(led_cdev, 5120 struct tpacpi_led_classdev, 5121 led_classdev); 5122 data->new_state = brightness; 5123 queue_work(tpacpi_wq, &data->work); 5124 } 5125 5126 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5127 { 5128 int level; 5129 5130 level = kbdlight_get_level(); 5131 if (level < 0) 5132 return 0; 5133 5134 return level; 5135 } 5136 5137 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5138 .led_classdev = { 5139 .name = "tpacpi::kbd_backlight", 5140 .max_brightness = 2, 5141 .brightness_set = &kbdlight_sysfs_set, 5142 .brightness_get = &kbdlight_sysfs_get, 5143 } 5144 }; 5145 5146 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5147 { 5148 int rc; 5149 5150 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5151 5152 TPACPI_ACPIHANDLE_INIT(hkey); 5153 INIT_WORK(&tpacpi_led_kbdlight.work, kbdlight_set_worker); 5154 5155 if (!kbdlight_is_supported()) { 5156 tp_features.kbdlight = 0; 5157 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5158 return 1; 5159 } 5160 5161 tp_features.kbdlight = 1; 5162 5163 rc = led_classdev_register(&tpacpi_pdev->dev, 5164 &tpacpi_led_kbdlight.led_classdev); 5165 if (rc < 0) { 5166 tp_features.kbdlight = 0; 5167 return rc; 5168 } 5169 5170 return 0; 5171 } 5172 5173 static void kbdlight_exit(void) 5174 { 5175 if (tp_features.kbdlight) 5176 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5177 flush_workqueue(tpacpi_wq); 5178 } 5179 5180 static int kbdlight_set_level_and_update(int level) 5181 { 5182 int ret; 5183 struct led_classdev *led_cdev; 5184 5185 ret = kbdlight_set_level(level); 5186 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5187 5188 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5189 led_cdev->brightness = level; 5190 5191 return ret; 5192 } 5193 5194 static int kbdlight_read(struct seq_file *m) 5195 { 5196 int level; 5197 5198 if (!tp_features.kbdlight) { 5199 seq_printf(m, "status:\t\tnot supported\n"); 5200 } else { 5201 level = kbdlight_get_level(); 5202 if (level < 0) 5203 seq_printf(m, "status:\t\terror %d\n", level); 5204 else 5205 seq_printf(m, "status:\t\t%d\n", level); 5206 seq_printf(m, "commands:\t0, 1, 2\n"); 5207 } 5208 5209 return 0; 5210 } 5211 5212 static int kbdlight_write(char *buf) 5213 { 5214 char *cmd; 5215 int level = -1; 5216 5217 if (!tp_features.kbdlight) 5218 return -ENODEV; 5219 5220 while ((cmd = next_cmd(&buf))) { 5221 if (strlencmp(cmd, "0") == 0) 5222 level = 0; 5223 else if (strlencmp(cmd, "1") == 0) 5224 level = 1; 5225 else if (strlencmp(cmd, "2") == 0) 5226 level = 2; 5227 else 5228 return -EINVAL; 5229 } 5230 5231 if (level == -1) 5232 return -EINVAL; 5233 5234 return kbdlight_set_level_and_update(level); 5235 } 5236 5237 static void kbdlight_suspend(void) 5238 { 5239 struct led_classdev *led_cdev; 5240 5241 if (!tp_features.kbdlight) 5242 return; 5243 5244 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5245 led_update_brightness(led_cdev); 5246 led_classdev_suspend(led_cdev); 5247 } 5248 5249 static void kbdlight_resume(void) 5250 { 5251 if (!tp_features.kbdlight) 5252 return; 5253 5254 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5255 } 5256 5257 static struct ibm_struct kbdlight_driver_data = { 5258 .name = "kbdlight", 5259 .read = kbdlight_read, 5260 .write = kbdlight_write, 5261 .suspend = kbdlight_suspend, 5262 .resume = kbdlight_resume, 5263 .exit = kbdlight_exit, 5264 }; 5265 5266 /************************************************************************* 5267 * Light (thinklight) subdriver 5268 */ 5269 5270 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5271 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5272 5273 static int light_get_status(void) 5274 { 5275 int status = 0; 5276 5277 if (tp_features.light_status) { 5278 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5279 return -EIO; 5280 return (!!status); 5281 } 5282 5283 return -ENXIO; 5284 } 5285 5286 static int light_set_status(int status) 5287 { 5288 int rc; 5289 5290 if (tp_features.light) { 5291 if (cmos_handle) { 5292 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5293 (status) ? 5294 TP_CMOS_THINKLIGHT_ON : 5295 TP_CMOS_THINKLIGHT_OFF); 5296 } else { 5297 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5298 (status) ? 1 : 0); 5299 } 5300 return (rc) ? 0 : -EIO; 5301 } 5302 5303 return -ENXIO; 5304 } 5305 5306 static void light_set_status_worker(struct work_struct *work) 5307 { 5308 struct tpacpi_led_classdev *data = 5309 container_of(work, struct tpacpi_led_classdev, work); 5310 5311 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5312 light_set_status((data->new_state != TPACPI_LED_OFF)); 5313 } 5314 5315 static void light_sysfs_set(struct led_classdev *led_cdev, 5316 enum led_brightness brightness) 5317 { 5318 struct tpacpi_led_classdev *data = 5319 container_of(led_cdev, 5320 struct tpacpi_led_classdev, 5321 led_classdev); 5322 data->new_state = (brightness != LED_OFF) ? 5323 TPACPI_LED_ON : TPACPI_LED_OFF; 5324 queue_work(tpacpi_wq, &data->work); 5325 } 5326 5327 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5328 { 5329 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5330 } 5331 5332 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5333 .led_classdev = { 5334 .name = "tpacpi::thinklight", 5335 .brightness_set = &light_sysfs_set, 5336 .brightness_get = &light_sysfs_get, 5337 } 5338 }; 5339 5340 static int __init light_init(struct ibm_init_struct *iibm) 5341 { 5342 int rc; 5343 5344 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5345 5346 if (tpacpi_is_ibm()) { 5347 TPACPI_ACPIHANDLE_INIT(ledb); 5348 TPACPI_ACPIHANDLE_INIT(lght); 5349 } 5350 TPACPI_ACPIHANDLE_INIT(cmos); 5351 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 5352 5353 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5354 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5355 5356 if (tp_features.light) 5357 /* light status not supported on 5358 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5359 tp_features.light_status = 5360 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5361 5362 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5363 str_supported(tp_features.light), 5364 str_supported(tp_features.light_status)); 5365 5366 if (!tp_features.light) 5367 return 1; 5368 5369 rc = led_classdev_register(&tpacpi_pdev->dev, 5370 &tpacpi_led_thinklight.led_classdev); 5371 5372 if (rc < 0) { 5373 tp_features.light = 0; 5374 tp_features.light_status = 0; 5375 } else { 5376 rc = 0; 5377 } 5378 5379 return rc; 5380 } 5381 5382 static void light_exit(void) 5383 { 5384 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5385 flush_workqueue(tpacpi_wq); 5386 } 5387 5388 static int light_read(struct seq_file *m) 5389 { 5390 int status; 5391 5392 if (!tp_features.light) { 5393 seq_printf(m, "status:\t\tnot supported\n"); 5394 } else if (!tp_features.light_status) { 5395 seq_printf(m, "status:\t\tunknown\n"); 5396 seq_printf(m, "commands:\ton, off\n"); 5397 } else { 5398 status = light_get_status(); 5399 if (status < 0) 5400 return status; 5401 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5402 seq_printf(m, "commands:\ton, off\n"); 5403 } 5404 5405 return 0; 5406 } 5407 5408 static int light_write(char *buf) 5409 { 5410 char *cmd; 5411 int newstatus = 0; 5412 5413 if (!tp_features.light) 5414 return -ENODEV; 5415 5416 while ((cmd = next_cmd(&buf))) { 5417 if (strlencmp(cmd, "on") == 0) { 5418 newstatus = 1; 5419 } else if (strlencmp(cmd, "off") == 0) { 5420 newstatus = 0; 5421 } else 5422 return -EINVAL; 5423 } 5424 5425 return light_set_status(newstatus); 5426 } 5427 5428 static struct ibm_struct light_driver_data = { 5429 .name = "light", 5430 .read = light_read, 5431 .write = light_write, 5432 .exit = light_exit, 5433 }; 5434 5435 /************************************************************************* 5436 * CMOS subdriver 5437 */ 5438 5439 /* sysfs cmos_command -------------------------------------------------- */ 5440 static ssize_t cmos_command_store(struct device *dev, 5441 struct device_attribute *attr, 5442 const char *buf, size_t count) 5443 { 5444 unsigned long cmos_cmd; 5445 int res; 5446 5447 if (parse_strtoul(buf, 21, &cmos_cmd)) 5448 return -EINVAL; 5449 5450 res = issue_thinkpad_cmos_command(cmos_cmd); 5451 return (res) ? res : count; 5452 } 5453 5454 static DEVICE_ATTR_WO(cmos_command); 5455 5456 /* --------------------------------------------------------------------- */ 5457 5458 static int __init cmos_init(struct ibm_init_struct *iibm) 5459 { 5460 int res; 5461 5462 vdbg_printk(TPACPI_DBG_INIT, 5463 "initializing cmos commands subdriver\n"); 5464 5465 TPACPI_ACPIHANDLE_INIT(cmos); 5466 5467 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5468 str_supported(cmos_handle != NULL)); 5469 5470 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5471 if (res) 5472 return res; 5473 5474 return (cmos_handle) ? 0 : 1; 5475 } 5476 5477 static void cmos_exit(void) 5478 { 5479 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5480 } 5481 5482 static int cmos_read(struct seq_file *m) 5483 { 5484 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5485 R30, R31, T20-22, X20-21 */ 5486 if (!cmos_handle) 5487 seq_printf(m, "status:\t\tnot supported\n"); 5488 else { 5489 seq_printf(m, "status:\t\tsupported\n"); 5490 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5491 } 5492 5493 return 0; 5494 } 5495 5496 static int cmos_write(char *buf) 5497 { 5498 char *cmd; 5499 int cmos_cmd, res; 5500 5501 while ((cmd = next_cmd(&buf))) { 5502 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5503 cmos_cmd >= 0 && cmos_cmd <= 21) { 5504 /* cmos_cmd set */ 5505 } else 5506 return -EINVAL; 5507 5508 res = issue_thinkpad_cmos_command(cmos_cmd); 5509 if (res) 5510 return res; 5511 } 5512 5513 return 0; 5514 } 5515 5516 static struct ibm_struct cmos_driver_data = { 5517 .name = "cmos", 5518 .read = cmos_read, 5519 .write = cmos_write, 5520 .exit = cmos_exit, 5521 }; 5522 5523 /************************************************************************* 5524 * LED subdriver 5525 */ 5526 5527 enum led_access_mode { 5528 TPACPI_LED_NONE = 0, 5529 TPACPI_LED_570, /* 570 */ 5530 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5531 TPACPI_LED_NEW, /* all others */ 5532 }; 5533 5534 enum { /* For TPACPI_LED_OLD */ 5535 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5536 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5537 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5538 }; 5539 5540 static enum led_access_mode led_supported; 5541 5542 static acpi_handle led_handle; 5543 5544 #define TPACPI_LED_NUMLEDS 16 5545 static struct tpacpi_led_classdev *tpacpi_leds; 5546 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5547 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5548 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5549 "tpacpi::power", 5550 "tpacpi:orange:batt", 5551 "tpacpi:green:batt", 5552 "tpacpi::dock_active", 5553 "tpacpi::bay_active", 5554 "tpacpi::dock_batt", 5555 "tpacpi::unknown_led", 5556 "tpacpi::standby", 5557 "tpacpi::dock_status1", 5558 "tpacpi::dock_status2", 5559 "tpacpi::unknown_led2", 5560 "tpacpi::unknown_led3", 5561 "tpacpi::thinkvantage", 5562 }; 5563 #define TPACPI_SAFE_LEDS 0x1081U 5564 5565 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5566 { 5567 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5568 return false; 5569 #else 5570 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5571 #endif 5572 } 5573 5574 static int led_get_status(const unsigned int led) 5575 { 5576 int status; 5577 enum led_status_t led_s; 5578 5579 switch (led_supported) { 5580 case TPACPI_LED_570: 5581 if (!acpi_evalf(ec_handle, 5582 &status, "GLED", "dd", 1 << led)) 5583 return -EIO; 5584 led_s = (status == 0) ? 5585 TPACPI_LED_OFF : 5586 ((status == 1) ? 5587 TPACPI_LED_ON : 5588 TPACPI_LED_BLINK); 5589 tpacpi_led_state_cache[led] = led_s; 5590 return led_s; 5591 default: 5592 return -ENXIO; 5593 } 5594 5595 /* not reached */ 5596 } 5597 5598 static int led_set_status(const unsigned int led, 5599 const enum led_status_t ledstatus) 5600 { 5601 /* off, on, blink. Index is led_status_t */ 5602 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5603 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5604 5605 int rc = 0; 5606 5607 switch (led_supported) { 5608 case TPACPI_LED_570: 5609 /* 570 */ 5610 if (unlikely(led > 7)) 5611 return -EINVAL; 5612 if (unlikely(tpacpi_is_led_restricted(led))) 5613 return -EPERM; 5614 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5615 (1 << led), led_sled_arg1[ledstatus])) 5616 rc = -EIO; 5617 break; 5618 case TPACPI_LED_OLD: 5619 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5620 if (unlikely(led > 7)) 5621 return -EINVAL; 5622 if (unlikely(tpacpi_is_led_restricted(led))) 5623 return -EPERM; 5624 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5625 if (rc >= 0) 5626 rc = ec_write(TPACPI_LED_EC_HLBL, 5627 (ledstatus == TPACPI_LED_BLINK) << led); 5628 if (rc >= 0) 5629 rc = ec_write(TPACPI_LED_EC_HLCL, 5630 (ledstatus != TPACPI_LED_OFF) << led); 5631 break; 5632 case TPACPI_LED_NEW: 5633 /* all others */ 5634 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5635 return -EINVAL; 5636 if (unlikely(tpacpi_is_led_restricted(led))) 5637 return -EPERM; 5638 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5639 led, led_led_arg1[ledstatus])) 5640 rc = -EIO; 5641 break; 5642 default: 5643 rc = -ENXIO; 5644 } 5645 5646 if (!rc) 5647 tpacpi_led_state_cache[led] = ledstatus; 5648 5649 return rc; 5650 } 5651 5652 static void led_set_status_worker(struct work_struct *work) 5653 { 5654 struct tpacpi_led_classdev *data = 5655 container_of(work, struct tpacpi_led_classdev, work); 5656 5657 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5658 led_set_status(data->led, data->new_state); 5659 } 5660 5661 static void led_sysfs_set(struct led_classdev *led_cdev, 5662 enum led_brightness brightness) 5663 { 5664 struct tpacpi_led_classdev *data = container_of(led_cdev, 5665 struct tpacpi_led_classdev, led_classdev); 5666 5667 if (brightness == LED_OFF) 5668 data->new_state = TPACPI_LED_OFF; 5669 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5670 data->new_state = TPACPI_LED_ON; 5671 else 5672 data->new_state = TPACPI_LED_BLINK; 5673 5674 queue_work(tpacpi_wq, &data->work); 5675 } 5676 5677 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5678 unsigned long *delay_on, unsigned long *delay_off) 5679 { 5680 struct tpacpi_led_classdev *data = container_of(led_cdev, 5681 struct tpacpi_led_classdev, led_classdev); 5682 5683 /* Can we choose the flash rate? */ 5684 if (*delay_on == 0 && *delay_off == 0) { 5685 /* yes. set them to the hardware blink rate (1 Hz) */ 5686 *delay_on = 500; /* ms */ 5687 *delay_off = 500; /* ms */ 5688 } else if ((*delay_on != 500) || (*delay_off != 500)) 5689 return -EINVAL; 5690 5691 data->new_state = TPACPI_LED_BLINK; 5692 queue_work(tpacpi_wq, &data->work); 5693 5694 return 0; 5695 } 5696 5697 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5698 { 5699 int rc; 5700 5701 struct tpacpi_led_classdev *data = container_of(led_cdev, 5702 struct tpacpi_led_classdev, led_classdev); 5703 5704 rc = led_get_status(data->led); 5705 5706 if (rc == TPACPI_LED_OFF || rc < 0) 5707 rc = LED_OFF; /* no error handling in led class :( */ 5708 else 5709 rc = LED_FULL; 5710 5711 return rc; 5712 } 5713 5714 static void led_exit(void) 5715 { 5716 unsigned int i; 5717 5718 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5719 if (tpacpi_leds[i].led_classdev.name) 5720 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5721 } 5722 5723 flush_workqueue(tpacpi_wq); 5724 kfree(tpacpi_leds); 5725 } 5726 5727 static int __init tpacpi_init_led(unsigned int led) 5728 { 5729 int rc; 5730 5731 tpacpi_leds[led].led = led; 5732 5733 /* LEDs with no name don't get registered */ 5734 if (!tpacpi_led_names[led]) 5735 return 0; 5736 5737 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5738 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5739 if (led_supported == TPACPI_LED_570) 5740 tpacpi_leds[led].led_classdev.brightness_get = 5741 &led_sysfs_get; 5742 5743 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5744 5745 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5746 5747 rc = led_classdev_register(&tpacpi_pdev->dev, 5748 &tpacpi_leds[led].led_classdev); 5749 if (rc < 0) 5750 tpacpi_leds[led].led_classdev.name = NULL; 5751 5752 return rc; 5753 } 5754 5755 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5756 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5757 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5758 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5759 5760 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5761 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5762 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5763 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5764 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5765 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5766 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5767 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5768 5769 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5770 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5771 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5772 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5773 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5774 5775 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5776 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5777 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5778 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5779 5780 /* (1) - may have excess leds enabled on MSB */ 5781 5782 /* Defaults (order matters, keep last, don't reorder!) */ 5783 { /* Lenovo */ 5784 .vendor = PCI_VENDOR_ID_LENOVO, 5785 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5786 .quirks = 0x1fffU, 5787 }, 5788 { /* IBM ThinkPads with no EC version string */ 5789 .vendor = PCI_VENDOR_ID_IBM, 5790 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5791 .quirks = 0x00ffU, 5792 }, 5793 { /* IBM ThinkPads with EC version string */ 5794 .vendor = PCI_VENDOR_ID_IBM, 5795 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5796 .quirks = 0x00bfU, 5797 }, 5798 }; 5799 5800 #undef TPACPI_LEDQ_IBM 5801 #undef TPACPI_LEDQ_LNV 5802 5803 static enum led_access_mode __init led_init_detect_mode(void) 5804 { 5805 acpi_status status; 5806 5807 if (tpacpi_is_ibm()) { 5808 /* 570 */ 5809 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5810 if (ACPI_SUCCESS(status)) 5811 return TPACPI_LED_570; 5812 5813 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5814 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5815 if (ACPI_SUCCESS(status)) 5816 return TPACPI_LED_OLD; 5817 } 5818 5819 /* most others */ 5820 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5821 if (ACPI_SUCCESS(status)) 5822 return TPACPI_LED_NEW; 5823 5824 /* R30, R31, and unknown firmwares */ 5825 led_handle = NULL; 5826 return TPACPI_LED_NONE; 5827 } 5828 5829 static int __init led_init(struct ibm_init_struct *iibm) 5830 { 5831 unsigned int i; 5832 int rc; 5833 unsigned long useful_leds; 5834 5835 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5836 5837 led_supported = led_init_detect_mode(); 5838 5839 if (led_supported != TPACPI_LED_NONE) { 5840 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5841 ARRAY_SIZE(led_useful_qtable)); 5842 5843 if (!useful_leds) { 5844 led_handle = NULL; 5845 led_supported = TPACPI_LED_NONE; 5846 } 5847 } 5848 5849 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5850 str_supported(led_supported), led_supported); 5851 5852 if (led_supported == TPACPI_LED_NONE) 5853 return 1; 5854 5855 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5856 GFP_KERNEL); 5857 if (!tpacpi_leds) { 5858 pr_err("Out of memory for LED data\n"); 5859 return -ENOMEM; 5860 } 5861 5862 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5863 tpacpi_leds[i].led = -1; 5864 5865 if (!tpacpi_is_led_restricted(i) && 5866 test_bit(i, &useful_leds)) { 5867 rc = tpacpi_init_led(i); 5868 if (rc < 0) { 5869 led_exit(); 5870 return rc; 5871 } 5872 } 5873 } 5874 5875 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5876 pr_notice("warning: userspace override of important " 5877 "firmware LEDs is enabled\n"); 5878 #endif 5879 return 0; 5880 } 5881 5882 #define str_led_status(s) \ 5883 ((s) == TPACPI_LED_OFF ? "off" : \ 5884 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5885 5886 static int led_read(struct seq_file *m) 5887 { 5888 if (!led_supported) { 5889 seq_printf(m, "status:\t\tnot supported\n"); 5890 return 0; 5891 } 5892 seq_printf(m, "status:\t\tsupported\n"); 5893 5894 if (led_supported == TPACPI_LED_570) { 5895 /* 570 */ 5896 int i, status; 5897 for (i = 0; i < 8; i++) { 5898 status = led_get_status(i); 5899 if (status < 0) 5900 return -EIO; 5901 seq_printf(m, "%d:\t\t%s\n", 5902 i, str_led_status(status)); 5903 } 5904 } 5905 5906 seq_printf(m, "commands:\t" 5907 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5908 5909 return 0; 5910 } 5911 5912 static int led_write(char *buf) 5913 { 5914 char *cmd; 5915 int led, rc; 5916 enum led_status_t s; 5917 5918 if (!led_supported) 5919 return -ENODEV; 5920 5921 while ((cmd = next_cmd(&buf))) { 5922 if (sscanf(cmd, "%d", &led) != 1) 5923 return -EINVAL; 5924 5925 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 5926 tpacpi_leds[led].led < 0) 5927 return -ENODEV; 5928 5929 if (strstr(cmd, "off")) { 5930 s = TPACPI_LED_OFF; 5931 } else if (strstr(cmd, "on")) { 5932 s = TPACPI_LED_ON; 5933 } else if (strstr(cmd, "blink")) { 5934 s = TPACPI_LED_BLINK; 5935 } else { 5936 return -EINVAL; 5937 } 5938 5939 rc = led_set_status(led, s); 5940 if (rc < 0) 5941 return rc; 5942 } 5943 5944 return 0; 5945 } 5946 5947 static struct ibm_struct led_driver_data = { 5948 .name = "led", 5949 .read = led_read, 5950 .write = led_write, 5951 .exit = led_exit, 5952 }; 5953 5954 /************************************************************************* 5955 * Beep subdriver 5956 */ 5957 5958 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5959 5960 #define TPACPI_BEEP_Q1 0x0001 5961 5962 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5963 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5964 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5965 }; 5966 5967 static int __init beep_init(struct ibm_init_struct *iibm) 5968 { 5969 unsigned long quirks; 5970 5971 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5972 5973 TPACPI_ACPIHANDLE_INIT(beep); 5974 5975 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5976 str_supported(beep_handle != NULL)); 5977 5978 quirks = tpacpi_check_quirks(beep_quirk_table, 5979 ARRAY_SIZE(beep_quirk_table)); 5980 5981 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5982 5983 return (beep_handle) ? 0 : 1; 5984 } 5985 5986 static int beep_read(struct seq_file *m) 5987 { 5988 if (!beep_handle) 5989 seq_printf(m, "status:\t\tnot supported\n"); 5990 else { 5991 seq_printf(m, "status:\t\tsupported\n"); 5992 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5993 } 5994 5995 return 0; 5996 } 5997 5998 static int beep_write(char *buf) 5999 { 6000 char *cmd; 6001 int beep_cmd; 6002 6003 if (!beep_handle) 6004 return -ENODEV; 6005 6006 while ((cmd = next_cmd(&buf))) { 6007 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6008 beep_cmd >= 0 && beep_cmd <= 17) { 6009 /* beep_cmd set */ 6010 } else 6011 return -EINVAL; 6012 if (tp_features.beep_needs_two_args) { 6013 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6014 beep_cmd, 0)) 6015 return -EIO; 6016 } else { 6017 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6018 beep_cmd)) 6019 return -EIO; 6020 } 6021 } 6022 6023 return 0; 6024 } 6025 6026 static struct ibm_struct beep_driver_data = { 6027 .name = "beep", 6028 .read = beep_read, 6029 .write = beep_write, 6030 }; 6031 6032 /************************************************************************* 6033 * Thermal subdriver 6034 */ 6035 6036 enum thermal_access_mode { 6037 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6038 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6039 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6040 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6041 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6042 }; 6043 6044 enum { /* TPACPI_THERMAL_TPEC_* */ 6045 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6046 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6047 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6048 6049 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6050 }; 6051 6052 6053 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6054 struct ibm_thermal_sensors_struct { 6055 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6056 }; 6057 6058 static enum thermal_access_mode thermal_read_mode; 6059 6060 /* idx is zero-based */ 6061 static int thermal_get_sensor(int idx, s32 *value) 6062 { 6063 int t; 6064 s8 tmp; 6065 char tmpi[5]; 6066 6067 t = TP_EC_THERMAL_TMP0; 6068 6069 switch (thermal_read_mode) { 6070 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6071 case TPACPI_THERMAL_TPEC_16: 6072 if (idx >= 8 && idx <= 15) { 6073 t = TP_EC_THERMAL_TMP8; 6074 idx -= 8; 6075 } 6076 /* fallthrough */ 6077 #endif 6078 case TPACPI_THERMAL_TPEC_8: 6079 if (idx <= 7) { 6080 if (!acpi_ec_read(t + idx, &tmp)) 6081 return -EIO; 6082 *value = tmp * 1000; 6083 return 0; 6084 } 6085 break; 6086 6087 case TPACPI_THERMAL_ACPI_UPDT: 6088 if (idx <= 7) { 6089 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6090 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6091 return -EIO; 6092 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6093 return -EIO; 6094 *value = (t - 2732) * 100; 6095 return 0; 6096 } 6097 break; 6098 6099 case TPACPI_THERMAL_ACPI_TMP07: 6100 if (idx <= 7) { 6101 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6102 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6103 return -EIO; 6104 if (t > 127 || t < -127) 6105 t = TP_EC_THERMAL_TMP_NA; 6106 *value = t * 1000; 6107 return 0; 6108 } 6109 break; 6110 6111 case TPACPI_THERMAL_NONE: 6112 default: 6113 return -ENOSYS; 6114 } 6115 6116 return -EINVAL; 6117 } 6118 6119 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6120 { 6121 int res, i; 6122 int n; 6123 6124 n = 8; 6125 i = 0; 6126 6127 if (!s) 6128 return -EINVAL; 6129 6130 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6131 n = 16; 6132 6133 for (i = 0 ; i < n; i++) { 6134 res = thermal_get_sensor(i, &s->temp[i]); 6135 if (res) 6136 return res; 6137 } 6138 6139 return n; 6140 } 6141 6142 static void thermal_dump_all_sensors(void) 6143 { 6144 int n, i; 6145 struct ibm_thermal_sensors_struct t; 6146 6147 n = thermal_get_sensors(&t); 6148 if (n <= 0) 6149 return; 6150 6151 pr_notice("temperatures (Celsius):"); 6152 6153 for (i = 0; i < n; i++) { 6154 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6155 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6156 else 6157 pr_cont(" N/A"); 6158 } 6159 6160 pr_cont("\n"); 6161 } 6162 6163 /* sysfs temp##_input -------------------------------------------------- */ 6164 6165 static ssize_t thermal_temp_input_show(struct device *dev, 6166 struct device_attribute *attr, 6167 char *buf) 6168 { 6169 struct sensor_device_attribute *sensor_attr = 6170 to_sensor_dev_attr(attr); 6171 int idx = sensor_attr->index; 6172 s32 value; 6173 int res; 6174 6175 res = thermal_get_sensor(idx, &value); 6176 if (res) 6177 return res; 6178 if (value == TPACPI_THERMAL_SENSOR_NA) 6179 return -ENXIO; 6180 6181 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6182 } 6183 6184 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6185 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6186 thermal_temp_input_show, NULL, _idxB) 6187 6188 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6189 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6190 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6191 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6192 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6193 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6194 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6195 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6196 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6197 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6198 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6199 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6200 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6201 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6202 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6203 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6204 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6205 }; 6206 6207 #define THERMAL_ATTRS(X) \ 6208 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6209 6210 static struct attribute *thermal_temp_input_attr[] = { 6211 THERMAL_ATTRS(8), 6212 THERMAL_ATTRS(9), 6213 THERMAL_ATTRS(10), 6214 THERMAL_ATTRS(11), 6215 THERMAL_ATTRS(12), 6216 THERMAL_ATTRS(13), 6217 THERMAL_ATTRS(14), 6218 THERMAL_ATTRS(15), 6219 THERMAL_ATTRS(0), 6220 THERMAL_ATTRS(1), 6221 THERMAL_ATTRS(2), 6222 THERMAL_ATTRS(3), 6223 THERMAL_ATTRS(4), 6224 THERMAL_ATTRS(5), 6225 THERMAL_ATTRS(6), 6226 THERMAL_ATTRS(7), 6227 NULL 6228 }; 6229 6230 static const struct attribute_group thermal_temp_input16_group = { 6231 .attrs = thermal_temp_input_attr 6232 }; 6233 6234 static const struct attribute_group thermal_temp_input8_group = { 6235 .attrs = &thermal_temp_input_attr[8] 6236 }; 6237 6238 #undef THERMAL_SENSOR_ATTR_TEMP 6239 #undef THERMAL_ATTRS 6240 6241 /* --------------------------------------------------------------------- */ 6242 6243 static int __init thermal_init(struct ibm_init_struct *iibm) 6244 { 6245 u8 t, ta1, ta2; 6246 int i; 6247 int acpi_tmp7; 6248 int res; 6249 6250 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6251 6252 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6253 6254 if (thinkpad_id.ec_model) { 6255 /* 6256 * Direct EC access mode: sensors at registers 6257 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6258 * non-implemented, thermal sensors return 0x80 when 6259 * not available 6260 */ 6261 6262 ta1 = ta2 = 0; 6263 for (i = 0; i < 8; i++) { 6264 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6265 ta1 |= t; 6266 } else { 6267 ta1 = 0; 6268 break; 6269 } 6270 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6271 ta2 |= t; 6272 } else { 6273 ta1 = 0; 6274 break; 6275 } 6276 } 6277 if (ta1 == 0) { 6278 /* This is sheer paranoia, but we handle it anyway */ 6279 if (acpi_tmp7) { 6280 pr_err("ThinkPad ACPI EC access misbehaving, " 6281 "falling back to ACPI TMPx access " 6282 "mode\n"); 6283 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6284 } else { 6285 pr_err("ThinkPad ACPI EC access misbehaving, " 6286 "disabling thermal sensors access\n"); 6287 thermal_read_mode = TPACPI_THERMAL_NONE; 6288 } 6289 } else { 6290 thermal_read_mode = 6291 (ta2 != 0) ? 6292 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6293 } 6294 } else if (acpi_tmp7) { 6295 if (tpacpi_is_ibm() && 6296 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6297 /* 600e/x, 770e, 770x */ 6298 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6299 } else { 6300 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6301 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6302 } 6303 } else { 6304 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6305 thermal_read_mode = TPACPI_THERMAL_NONE; 6306 } 6307 6308 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6309 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6310 thermal_read_mode); 6311 6312 switch (thermal_read_mode) { 6313 case TPACPI_THERMAL_TPEC_16: 6314 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 6315 &thermal_temp_input16_group); 6316 if (res) 6317 return res; 6318 break; 6319 case TPACPI_THERMAL_TPEC_8: 6320 case TPACPI_THERMAL_ACPI_TMP07: 6321 case TPACPI_THERMAL_ACPI_UPDT: 6322 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 6323 &thermal_temp_input8_group); 6324 if (res) 6325 return res; 6326 break; 6327 case TPACPI_THERMAL_NONE: 6328 default: 6329 return 1; 6330 } 6331 6332 return 0; 6333 } 6334 6335 static void thermal_exit(void) 6336 { 6337 switch (thermal_read_mode) { 6338 case TPACPI_THERMAL_TPEC_16: 6339 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 6340 &thermal_temp_input16_group); 6341 break; 6342 case TPACPI_THERMAL_TPEC_8: 6343 case TPACPI_THERMAL_ACPI_TMP07: 6344 case TPACPI_THERMAL_ACPI_UPDT: 6345 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 6346 &thermal_temp_input8_group); 6347 break; 6348 case TPACPI_THERMAL_NONE: 6349 default: 6350 break; 6351 } 6352 } 6353 6354 static int thermal_read(struct seq_file *m) 6355 { 6356 int n, i; 6357 struct ibm_thermal_sensors_struct t; 6358 6359 n = thermal_get_sensors(&t); 6360 if (unlikely(n < 0)) 6361 return n; 6362 6363 seq_printf(m, "temperatures:\t"); 6364 6365 if (n > 0) { 6366 for (i = 0; i < (n - 1); i++) 6367 seq_printf(m, "%d ", t.temp[i] / 1000); 6368 seq_printf(m, "%d\n", t.temp[i] / 1000); 6369 } else 6370 seq_printf(m, "not supported\n"); 6371 6372 return 0; 6373 } 6374 6375 static struct ibm_struct thermal_driver_data = { 6376 .name = "thermal", 6377 .read = thermal_read, 6378 .exit = thermal_exit, 6379 }; 6380 6381 /************************************************************************* 6382 * Backlight/brightness subdriver 6383 */ 6384 6385 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6386 6387 /* 6388 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6389 * CMOS NVRAM byte 0x5E, bits 0-3. 6390 * 6391 * EC HBRV (0x31) has the following layout 6392 * Bit 7: unknown function 6393 * Bit 6: unknown function 6394 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6395 * Bit 4: must be set to zero to avoid problems 6396 * Bit 3-0: backlight brightness level 6397 * 6398 * brightness_get_raw returns status data in the HBRV layout 6399 * 6400 * WARNING: The X61 has been verified to use HBRV for something else, so 6401 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6402 * testing on the very early *60 Lenovo models... 6403 */ 6404 6405 enum { 6406 TP_EC_BACKLIGHT = 0x31, 6407 6408 /* TP_EC_BACKLIGHT bitmasks */ 6409 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6410 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6411 TP_EC_BACKLIGHT_MAPSW = 0x20, 6412 }; 6413 6414 enum tpacpi_brightness_access_mode { 6415 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6416 TPACPI_BRGHT_MODE_EC, /* EC control */ 6417 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6418 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6419 TPACPI_BRGHT_MODE_MAX 6420 }; 6421 6422 static struct backlight_device *ibm_backlight_device; 6423 6424 static enum tpacpi_brightness_access_mode brightness_mode = 6425 TPACPI_BRGHT_MODE_MAX; 6426 6427 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6428 6429 static struct mutex brightness_mutex; 6430 6431 /* NVRAM brightness access, 6432 * call with brightness_mutex held! */ 6433 static unsigned int tpacpi_brightness_nvram_get(void) 6434 { 6435 u8 lnvram; 6436 6437 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6438 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6439 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6440 lnvram &= bright_maxlvl; 6441 6442 return lnvram; 6443 } 6444 6445 static void tpacpi_brightness_checkpoint_nvram(void) 6446 { 6447 u8 lec = 0; 6448 u8 b_nvram; 6449 6450 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6451 return; 6452 6453 vdbg_printk(TPACPI_DBG_BRGHT, 6454 "trying to checkpoint backlight level to NVRAM...\n"); 6455 6456 if (mutex_lock_killable(&brightness_mutex) < 0) 6457 return; 6458 6459 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6460 goto unlock; 6461 lec &= TP_EC_BACKLIGHT_LVLMSK; 6462 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6463 6464 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6465 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6466 /* NVRAM needs update */ 6467 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6468 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6469 b_nvram |= lec; 6470 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6471 dbg_printk(TPACPI_DBG_BRGHT, 6472 "updated NVRAM backlight level to %u (0x%02x)\n", 6473 (unsigned int) lec, (unsigned int) b_nvram); 6474 } else 6475 vdbg_printk(TPACPI_DBG_BRGHT, 6476 "NVRAM backlight level already is %u (0x%02x)\n", 6477 (unsigned int) lec, (unsigned int) b_nvram); 6478 6479 unlock: 6480 mutex_unlock(&brightness_mutex); 6481 } 6482 6483 6484 /* call with brightness_mutex held! */ 6485 static int tpacpi_brightness_get_raw(int *status) 6486 { 6487 u8 lec = 0; 6488 6489 switch (brightness_mode) { 6490 case TPACPI_BRGHT_MODE_UCMS_STEP: 6491 *status = tpacpi_brightness_nvram_get(); 6492 return 0; 6493 case TPACPI_BRGHT_MODE_EC: 6494 case TPACPI_BRGHT_MODE_ECNVRAM: 6495 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6496 return -EIO; 6497 *status = lec; 6498 return 0; 6499 default: 6500 return -ENXIO; 6501 } 6502 } 6503 6504 /* call with brightness_mutex held! */ 6505 /* do NOT call with illegal backlight level value */ 6506 static int tpacpi_brightness_set_ec(unsigned int value) 6507 { 6508 u8 lec = 0; 6509 6510 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6511 return -EIO; 6512 6513 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6514 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6515 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6516 return -EIO; 6517 6518 return 0; 6519 } 6520 6521 /* call with brightness_mutex held! */ 6522 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6523 { 6524 int cmos_cmd, inc; 6525 unsigned int current_value, i; 6526 6527 current_value = tpacpi_brightness_nvram_get(); 6528 6529 if (value == current_value) 6530 return 0; 6531 6532 cmos_cmd = (value > current_value) ? 6533 TP_CMOS_BRIGHTNESS_UP : 6534 TP_CMOS_BRIGHTNESS_DOWN; 6535 inc = (value > current_value) ? 1 : -1; 6536 6537 for (i = current_value; i != value; i += inc) 6538 if (issue_thinkpad_cmos_command(cmos_cmd)) 6539 return -EIO; 6540 6541 return 0; 6542 } 6543 6544 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6545 static int brightness_set(unsigned int value) 6546 { 6547 int res; 6548 6549 if (value > bright_maxlvl) 6550 return -EINVAL; 6551 6552 vdbg_printk(TPACPI_DBG_BRGHT, 6553 "set backlight level to %d\n", value); 6554 6555 res = mutex_lock_killable(&brightness_mutex); 6556 if (res < 0) 6557 return res; 6558 6559 switch (brightness_mode) { 6560 case TPACPI_BRGHT_MODE_EC: 6561 case TPACPI_BRGHT_MODE_ECNVRAM: 6562 res = tpacpi_brightness_set_ec(value); 6563 break; 6564 case TPACPI_BRGHT_MODE_UCMS_STEP: 6565 res = tpacpi_brightness_set_ucmsstep(value); 6566 break; 6567 default: 6568 res = -ENXIO; 6569 } 6570 6571 mutex_unlock(&brightness_mutex); 6572 return res; 6573 } 6574 6575 /* sysfs backlight class ----------------------------------------------- */ 6576 6577 static int brightness_update_status(struct backlight_device *bd) 6578 { 6579 unsigned int level = 6580 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6581 bd->props.power == FB_BLANK_UNBLANK) ? 6582 bd->props.brightness : 0; 6583 6584 dbg_printk(TPACPI_DBG_BRGHT, 6585 "backlight: attempt to set level to %d\n", 6586 level); 6587 6588 /* it is the backlight class's job (caller) to handle 6589 * EINTR and other errors properly */ 6590 return brightness_set(level); 6591 } 6592 6593 static int brightness_get(struct backlight_device *bd) 6594 { 6595 int status, res; 6596 6597 res = mutex_lock_killable(&brightness_mutex); 6598 if (res < 0) 6599 return 0; 6600 6601 res = tpacpi_brightness_get_raw(&status); 6602 6603 mutex_unlock(&brightness_mutex); 6604 6605 if (res < 0) 6606 return 0; 6607 6608 return status & TP_EC_BACKLIGHT_LVLMSK; 6609 } 6610 6611 static void tpacpi_brightness_notify_change(void) 6612 { 6613 backlight_force_update(ibm_backlight_device, 6614 BACKLIGHT_UPDATE_HOTKEY); 6615 } 6616 6617 static const struct backlight_ops ibm_backlight_data = { 6618 .get_brightness = brightness_get, 6619 .update_status = brightness_update_status, 6620 }; 6621 6622 /* --------------------------------------------------------------------- */ 6623 6624 /* 6625 * Call _BCL method of video device. On some ThinkPads this will 6626 * switch the firmware to the ACPI brightness control mode. 6627 */ 6628 6629 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6630 { 6631 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6632 union acpi_object *obj; 6633 struct acpi_device *device, *child; 6634 int rc; 6635 6636 if (acpi_bus_get_device(handle, &device)) 6637 return 0; 6638 6639 rc = 0; 6640 list_for_each_entry(child, &device->children, node) { 6641 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6642 NULL, &buffer); 6643 if (ACPI_FAILURE(status)) 6644 continue; 6645 6646 obj = (union acpi_object *)buffer.pointer; 6647 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6648 pr_err("Unknown _BCL data, please report this to %s\n", 6649 TPACPI_MAIL); 6650 rc = 0; 6651 } else { 6652 rc = obj->package.count; 6653 } 6654 break; 6655 } 6656 6657 kfree(buffer.pointer); 6658 return rc; 6659 } 6660 6661 6662 /* 6663 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6664 */ 6665 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6666 { 6667 acpi_handle video_device; 6668 int bcl_levels = 0; 6669 6670 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6671 if (video_device) 6672 bcl_levels = tpacpi_query_bcl_levels(video_device); 6673 6674 tp_features.bright_acpimode = (bcl_levels > 0); 6675 6676 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6677 } 6678 6679 /* 6680 * These are only useful for models that have only one possibility 6681 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6682 * these quirks. 6683 */ 6684 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6685 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6686 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6687 6688 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6689 /* Models with ATI GPUs known to require ECNVRAM mode */ 6690 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6691 6692 /* Models with ATI GPUs that can use ECNVRAM */ 6693 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6694 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6695 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6696 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6697 6698 /* Models with Intel Extreme Graphics 2 */ 6699 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6700 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6701 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6702 6703 /* Models with Intel GMA900 */ 6704 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6705 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6706 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6707 }; 6708 6709 /* 6710 * Returns < 0 for error, otherwise sets tp_features.bright_* 6711 * and bright_maxlvl. 6712 */ 6713 static void __init tpacpi_detect_brightness_capabilities(void) 6714 { 6715 unsigned int b; 6716 6717 vdbg_printk(TPACPI_DBG_INIT, 6718 "detecting firmware brightness interface capabilities\n"); 6719 6720 /* we could run a quirks check here (same table used by 6721 * brightness_init) if needed */ 6722 6723 /* 6724 * We always attempt to detect acpi support, so as to switch 6725 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6726 * going to publish a backlight interface 6727 */ 6728 b = tpacpi_check_std_acpi_brightness_support(); 6729 switch (b) { 6730 case 16: 6731 bright_maxlvl = 15; 6732 break; 6733 case 8: 6734 case 0: 6735 bright_maxlvl = 7; 6736 break; 6737 default: 6738 tp_features.bright_unkfw = 1; 6739 bright_maxlvl = b - 1; 6740 } 6741 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6742 } 6743 6744 static int __init brightness_init(struct ibm_init_struct *iibm) 6745 { 6746 struct backlight_properties props; 6747 int b; 6748 unsigned long quirks; 6749 6750 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6751 6752 mutex_init(&brightness_mutex); 6753 6754 quirks = tpacpi_check_quirks(brightness_quirk_table, 6755 ARRAY_SIZE(brightness_quirk_table)); 6756 6757 /* tpacpi_detect_brightness_capabilities() must have run already */ 6758 6759 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6760 if (tp_features.bright_unkfw) 6761 return 1; 6762 6763 if (!brightness_enable) { 6764 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6765 "brightness support disabled by " 6766 "module parameter\n"); 6767 return 1; 6768 } 6769 6770 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6771 if (brightness_enable > 1) { 6772 pr_info("Standard ACPI backlight interface " 6773 "available, not loading native one\n"); 6774 return 1; 6775 } else if (brightness_enable == 1) { 6776 pr_warn("Cannot enable backlight brightness support, " 6777 "ACPI is already handling it. Refer to the " 6778 "acpi_backlight kernel parameter.\n"); 6779 return 1; 6780 } 6781 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6782 pr_notice("Standard ACPI backlight interface not " 6783 "available, thinkpad_acpi native " 6784 "brightness control enabled\n"); 6785 } 6786 6787 /* 6788 * Check for module parameter bogosity, note that we 6789 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6790 * able to detect "unspecified" 6791 */ 6792 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6793 return -EINVAL; 6794 6795 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6796 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6797 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6798 if (quirks & TPACPI_BRGHT_Q_EC) 6799 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6800 else 6801 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6802 6803 dbg_printk(TPACPI_DBG_BRGHT, 6804 "driver auto-selected brightness_mode=%d\n", 6805 brightness_mode); 6806 } 6807 6808 /* Safety */ 6809 if (!tpacpi_is_ibm() && 6810 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6811 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6812 return -EINVAL; 6813 6814 if (tpacpi_brightness_get_raw(&b) < 0) 6815 return 1; 6816 6817 memset(&props, 0, sizeof(struct backlight_properties)); 6818 props.type = BACKLIGHT_PLATFORM; 6819 props.max_brightness = bright_maxlvl; 6820 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6821 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6822 NULL, NULL, 6823 &ibm_backlight_data, 6824 &props); 6825 if (IS_ERR(ibm_backlight_device)) { 6826 int rc = PTR_ERR(ibm_backlight_device); 6827 ibm_backlight_device = NULL; 6828 pr_err("Could not register backlight device\n"); 6829 return rc; 6830 } 6831 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6832 "brightness is supported\n"); 6833 6834 if (quirks & TPACPI_BRGHT_Q_ASK) { 6835 pr_notice("brightness: will use unverified default: " 6836 "brightness_mode=%d\n", brightness_mode); 6837 pr_notice("brightness: please report to %s whether it works well " 6838 "or not on your ThinkPad\n", TPACPI_MAIL); 6839 } 6840 6841 /* Added by mistake in early 2007. Probably useless, but it could 6842 * be working around some unknown firmware problem where the value 6843 * read at startup doesn't match the real hardware state... so leave 6844 * it in place just in case */ 6845 backlight_update_status(ibm_backlight_device); 6846 6847 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6848 "brightness: registering brightness hotkeys " 6849 "as change notification\n"); 6850 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6851 | TP_ACPI_HKEY_BRGHTUP_MASK 6852 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6853 return 0; 6854 } 6855 6856 static void brightness_suspend(void) 6857 { 6858 tpacpi_brightness_checkpoint_nvram(); 6859 } 6860 6861 static void brightness_shutdown(void) 6862 { 6863 tpacpi_brightness_checkpoint_nvram(); 6864 } 6865 6866 static void brightness_exit(void) 6867 { 6868 if (ibm_backlight_device) { 6869 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6870 "calling backlight_device_unregister()\n"); 6871 backlight_device_unregister(ibm_backlight_device); 6872 } 6873 6874 tpacpi_brightness_checkpoint_nvram(); 6875 } 6876 6877 static int brightness_read(struct seq_file *m) 6878 { 6879 int level; 6880 6881 level = brightness_get(NULL); 6882 if (level < 0) { 6883 seq_printf(m, "level:\t\tunreadable\n"); 6884 } else { 6885 seq_printf(m, "level:\t\t%d\n", level); 6886 seq_printf(m, "commands:\tup, down\n"); 6887 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6888 bright_maxlvl); 6889 } 6890 6891 return 0; 6892 } 6893 6894 static int brightness_write(char *buf) 6895 { 6896 int level; 6897 int rc; 6898 char *cmd; 6899 6900 level = brightness_get(NULL); 6901 if (level < 0) 6902 return level; 6903 6904 while ((cmd = next_cmd(&buf))) { 6905 if (strlencmp(cmd, "up") == 0) { 6906 if (level < bright_maxlvl) 6907 level++; 6908 } else if (strlencmp(cmd, "down") == 0) { 6909 if (level > 0) 6910 level--; 6911 } else if (sscanf(cmd, "level %d", &level) == 1 && 6912 level >= 0 && level <= bright_maxlvl) { 6913 /* new level set */ 6914 } else 6915 return -EINVAL; 6916 } 6917 6918 tpacpi_disclose_usertask("procfs brightness", 6919 "set level to %d\n", level); 6920 6921 /* 6922 * Now we know what the final level should be, so we try to set it. 6923 * Doing it this way makes the syscall restartable in case of EINTR 6924 */ 6925 rc = brightness_set(level); 6926 if (!rc && ibm_backlight_device) 6927 backlight_force_update(ibm_backlight_device, 6928 BACKLIGHT_UPDATE_SYSFS); 6929 return (rc == -EINTR) ? -ERESTARTSYS : rc; 6930 } 6931 6932 static struct ibm_struct brightness_driver_data = { 6933 .name = "brightness", 6934 .read = brightness_read, 6935 .write = brightness_write, 6936 .exit = brightness_exit, 6937 .suspend = brightness_suspend, 6938 .shutdown = brightness_shutdown, 6939 }; 6940 6941 /************************************************************************* 6942 * Volume subdriver 6943 */ 6944 6945 /* 6946 * IBM ThinkPads have a simple volume controller with MUTE gating. 6947 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 6948 * 6949 * Since the *61 series (and probably also the later *60 series), Lenovo 6950 * ThinkPads only implement the MUTE gate. 6951 * 6952 * EC register 0x30 6953 * Bit 6: MUTE (1 mutes sound) 6954 * Bit 3-0: Volume 6955 * Other bits should be zero as far as we know. 6956 * 6957 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 6958 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 6959 * such as bit 7 which is used to detect repeated presses of MUTE, 6960 * and we leave them unchanged. 6961 * 6962 * On newer Lenovo ThinkPads, the EC can automatically change the volume 6963 * in response to user input. Unfortunately, this rarely works well. 6964 * The laptop changes the state of its internal MUTE gate and, on some 6965 * models, sends KEY_MUTE, causing any user code that responds to the 6966 * mute button to get confused. The hardware MUTE gate is also 6967 * unnecessary, since user code can handle the mute button without 6968 * kernel or EC help. 6969 * 6970 * To avoid confusing userspace, we simply disable all EC-based mute 6971 * and volume controls when possible. 6972 */ 6973 6974 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 6975 6976 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 6977 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 6978 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 6979 6980 #if SNDRV_CARDS <= 32 6981 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 6982 #else 6983 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 6984 #endif 6985 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 6986 static char *alsa_id = "ThinkPadEC"; 6987 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 6988 6989 struct tpacpi_alsa_data { 6990 struct snd_card *card; 6991 struct snd_ctl_elem_id *ctl_mute_id; 6992 struct snd_ctl_elem_id *ctl_vol_id; 6993 }; 6994 6995 static struct snd_card *alsa_card; 6996 6997 enum { 6998 TP_EC_AUDIO = 0x30, 6999 7000 /* TP_EC_AUDIO bits */ 7001 TP_EC_AUDIO_MUTESW = 6, 7002 7003 /* TP_EC_AUDIO bitmasks */ 7004 TP_EC_AUDIO_LVL_MSK = 0x0F, 7005 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7006 7007 /* Maximum volume */ 7008 TP_EC_VOLUME_MAX = 14, 7009 }; 7010 7011 enum tpacpi_volume_access_mode { 7012 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7013 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7014 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7015 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7016 TPACPI_VOL_MODE_MAX 7017 }; 7018 7019 enum tpacpi_volume_capabilities { 7020 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7021 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7022 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7023 TPACPI_VOL_CAP_MAX 7024 }; 7025 7026 enum tpacpi_mute_btn_mode { 7027 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7028 /* We don't know what mode 1 is. */ 7029 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7030 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7031 }; 7032 7033 static enum tpacpi_volume_access_mode volume_mode = 7034 TPACPI_VOL_MODE_MAX; 7035 7036 static enum tpacpi_volume_capabilities volume_capabilities; 7037 static bool volume_control_allowed; 7038 static bool software_mute_requested = true; 7039 static bool software_mute_active; 7040 static int software_mute_orig_mode; 7041 7042 /* 7043 * Used to syncronize writers to TP_EC_AUDIO and 7044 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7045 */ 7046 static struct mutex volume_mutex; 7047 7048 static void tpacpi_volume_checkpoint_nvram(void) 7049 { 7050 u8 lec = 0; 7051 u8 b_nvram; 7052 u8 ec_mask; 7053 7054 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7055 return; 7056 if (!volume_control_allowed) 7057 return; 7058 if (software_mute_active) 7059 return; 7060 7061 vdbg_printk(TPACPI_DBG_MIXER, 7062 "trying to checkpoint mixer state to NVRAM...\n"); 7063 7064 if (tp_features.mixer_no_level_control) 7065 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7066 else 7067 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7068 7069 if (mutex_lock_killable(&volume_mutex) < 0) 7070 return; 7071 7072 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7073 goto unlock; 7074 lec &= ec_mask; 7075 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7076 7077 if (lec != (b_nvram & ec_mask)) { 7078 /* NVRAM needs update */ 7079 b_nvram &= ~ec_mask; 7080 b_nvram |= lec; 7081 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7082 dbg_printk(TPACPI_DBG_MIXER, 7083 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7084 (unsigned int) lec, (unsigned int) b_nvram); 7085 } else { 7086 vdbg_printk(TPACPI_DBG_MIXER, 7087 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7088 (unsigned int) lec, (unsigned int) b_nvram); 7089 } 7090 7091 unlock: 7092 mutex_unlock(&volume_mutex); 7093 } 7094 7095 static int volume_get_status_ec(u8 *status) 7096 { 7097 u8 s; 7098 7099 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7100 return -EIO; 7101 7102 *status = s; 7103 7104 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7105 7106 return 0; 7107 } 7108 7109 static int volume_get_status(u8 *status) 7110 { 7111 return volume_get_status_ec(status); 7112 } 7113 7114 static int volume_set_status_ec(const u8 status) 7115 { 7116 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7117 return -EIO; 7118 7119 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7120 7121 /* 7122 * On X200s, and possibly on others, it can take a while for 7123 * reads to become correct. 7124 */ 7125 msleep(1); 7126 7127 return 0; 7128 } 7129 7130 static int volume_set_status(const u8 status) 7131 { 7132 return volume_set_status_ec(status); 7133 } 7134 7135 /* returns < 0 on error, 0 on no change, 1 on change */ 7136 static int __volume_set_mute_ec(const bool mute) 7137 { 7138 int rc; 7139 u8 s, n; 7140 7141 if (mutex_lock_killable(&volume_mutex) < 0) 7142 return -EINTR; 7143 7144 rc = volume_get_status_ec(&s); 7145 if (rc) 7146 goto unlock; 7147 7148 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7149 s & ~TP_EC_AUDIO_MUTESW_MSK; 7150 7151 if (n != s) { 7152 rc = volume_set_status_ec(n); 7153 if (!rc) 7154 rc = 1; 7155 } 7156 7157 unlock: 7158 mutex_unlock(&volume_mutex); 7159 return rc; 7160 } 7161 7162 static int volume_alsa_set_mute(const bool mute) 7163 { 7164 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7165 (mute) ? "" : "un"); 7166 return __volume_set_mute_ec(mute); 7167 } 7168 7169 static int volume_set_mute(const bool mute) 7170 { 7171 int rc; 7172 7173 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7174 (mute) ? "" : "un"); 7175 7176 rc = __volume_set_mute_ec(mute); 7177 return (rc < 0) ? rc : 0; 7178 } 7179 7180 /* returns < 0 on error, 0 on no change, 1 on change */ 7181 static int __volume_set_volume_ec(const u8 vol) 7182 { 7183 int rc; 7184 u8 s, n; 7185 7186 if (vol > TP_EC_VOLUME_MAX) 7187 return -EINVAL; 7188 7189 if (mutex_lock_killable(&volume_mutex) < 0) 7190 return -EINTR; 7191 7192 rc = volume_get_status_ec(&s); 7193 if (rc) 7194 goto unlock; 7195 7196 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7197 7198 if (n != s) { 7199 rc = volume_set_status_ec(n); 7200 if (!rc) 7201 rc = 1; 7202 } 7203 7204 unlock: 7205 mutex_unlock(&volume_mutex); 7206 return rc; 7207 } 7208 7209 static int volume_set_software_mute(bool startup) 7210 { 7211 int result; 7212 7213 if (!tpacpi_is_lenovo()) 7214 return -ENODEV; 7215 7216 if (startup) { 7217 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7218 "HAUM", "qd")) 7219 return -EIO; 7220 7221 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7222 "Initial HAUM setting was %d\n", 7223 software_mute_orig_mode); 7224 } 7225 7226 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7227 (int)TP_EC_MUTE_BTN_NONE)) 7228 return -EIO; 7229 7230 if (result != TP_EC_MUTE_BTN_NONE) 7231 pr_warn("Unexpected SAUM result %d\n", 7232 result); 7233 7234 /* 7235 * In software mute mode, the standard codec controls take 7236 * precendence, so we unmute the ThinkPad HW switch at 7237 * startup. Just on case there are SAUM-capable ThinkPads 7238 * with level controls, set max HW volume as well. 7239 */ 7240 if (tp_features.mixer_no_level_control) 7241 result = volume_set_mute(false); 7242 else 7243 result = volume_set_status(TP_EC_VOLUME_MAX); 7244 7245 if (result != 0) 7246 pr_warn("Failed to unmute the HW mute switch\n"); 7247 7248 return 0; 7249 } 7250 7251 static void volume_exit_software_mute(void) 7252 { 7253 int r; 7254 7255 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7256 || r != software_mute_orig_mode) 7257 pr_warn("Failed to restore mute mode\n"); 7258 } 7259 7260 static int volume_alsa_set_volume(const u8 vol) 7261 { 7262 dbg_printk(TPACPI_DBG_MIXER, 7263 "ALSA: trying to set volume level to %hu\n", vol); 7264 return __volume_set_volume_ec(vol); 7265 } 7266 7267 static void volume_alsa_notify_change(void) 7268 { 7269 struct tpacpi_alsa_data *d; 7270 7271 if (alsa_card && alsa_card->private_data) { 7272 d = alsa_card->private_data; 7273 if (d->ctl_mute_id) 7274 snd_ctl_notify(alsa_card, 7275 SNDRV_CTL_EVENT_MASK_VALUE, 7276 d->ctl_mute_id); 7277 if (d->ctl_vol_id) 7278 snd_ctl_notify(alsa_card, 7279 SNDRV_CTL_EVENT_MASK_VALUE, 7280 d->ctl_vol_id); 7281 } 7282 } 7283 7284 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7285 struct snd_ctl_elem_info *uinfo) 7286 { 7287 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7288 uinfo->count = 1; 7289 uinfo->value.integer.min = 0; 7290 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7291 return 0; 7292 } 7293 7294 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7295 struct snd_ctl_elem_value *ucontrol) 7296 { 7297 u8 s; 7298 int rc; 7299 7300 rc = volume_get_status(&s); 7301 if (rc < 0) 7302 return rc; 7303 7304 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7305 return 0; 7306 } 7307 7308 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7309 struct snd_ctl_elem_value *ucontrol) 7310 { 7311 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7312 ucontrol->value.integer.value[0]); 7313 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7314 } 7315 7316 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7317 7318 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7319 struct snd_ctl_elem_value *ucontrol) 7320 { 7321 u8 s; 7322 int rc; 7323 7324 rc = volume_get_status(&s); 7325 if (rc < 0) 7326 return rc; 7327 7328 ucontrol->value.integer.value[0] = 7329 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7330 return 0; 7331 } 7332 7333 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7334 struct snd_ctl_elem_value *ucontrol) 7335 { 7336 tpacpi_disclose_usertask("ALSA", "%smute\n", 7337 ucontrol->value.integer.value[0] ? 7338 "un" : ""); 7339 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7340 } 7341 7342 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7343 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7344 .name = "Console Playback Volume", 7345 .index = 0, 7346 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7347 .info = volume_alsa_vol_info, 7348 .get = volume_alsa_vol_get, 7349 }; 7350 7351 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7352 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7353 .name = "Console Playback Switch", 7354 .index = 0, 7355 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7356 .info = volume_alsa_mute_info, 7357 .get = volume_alsa_mute_get, 7358 }; 7359 7360 static void volume_suspend(void) 7361 { 7362 tpacpi_volume_checkpoint_nvram(); 7363 } 7364 7365 static void volume_resume(void) 7366 { 7367 if (software_mute_active) { 7368 if (volume_set_software_mute(false) < 0) 7369 pr_warn("Failed to restore software mute\n"); 7370 } else { 7371 volume_alsa_notify_change(); 7372 } 7373 } 7374 7375 static void volume_shutdown(void) 7376 { 7377 tpacpi_volume_checkpoint_nvram(); 7378 } 7379 7380 static void volume_exit(void) 7381 { 7382 if (alsa_card) { 7383 snd_card_free(alsa_card); 7384 alsa_card = NULL; 7385 } 7386 7387 tpacpi_volume_checkpoint_nvram(); 7388 7389 if (software_mute_active) 7390 volume_exit_software_mute(); 7391 } 7392 7393 static int __init volume_create_alsa_mixer(void) 7394 { 7395 struct snd_card *card; 7396 struct tpacpi_alsa_data *data; 7397 struct snd_kcontrol *ctl_vol; 7398 struct snd_kcontrol *ctl_mute; 7399 int rc; 7400 7401 rc = snd_card_new(&tpacpi_pdev->dev, 7402 alsa_index, alsa_id, THIS_MODULE, 7403 sizeof(struct tpacpi_alsa_data), &card); 7404 if (rc < 0 || !card) { 7405 pr_err("Failed to create ALSA card structures: %d\n", rc); 7406 return 1; 7407 } 7408 7409 BUG_ON(!card->private_data); 7410 data = card->private_data; 7411 data->card = card; 7412 7413 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7414 sizeof(card->driver)); 7415 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7416 sizeof(card->shortname)); 7417 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7418 (thinkpad_id.ec_version_str) ? 7419 thinkpad_id.ec_version_str : "(unknown)"); 7420 snprintf(card->longname, sizeof(card->longname), 7421 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7422 (thinkpad_id.ec_version_str) ? 7423 thinkpad_id.ec_version_str : "unknown"); 7424 7425 if (volume_control_allowed) { 7426 volume_alsa_control_vol.put = volume_alsa_vol_put; 7427 volume_alsa_control_vol.access = 7428 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7429 7430 volume_alsa_control_mute.put = volume_alsa_mute_put; 7431 volume_alsa_control_mute.access = 7432 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7433 } 7434 7435 if (!tp_features.mixer_no_level_control) { 7436 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7437 rc = snd_ctl_add(card, ctl_vol); 7438 if (rc < 0) { 7439 pr_err("Failed to create ALSA volume control: %d\n", 7440 rc); 7441 goto err_exit; 7442 } 7443 data->ctl_vol_id = &ctl_vol->id; 7444 } 7445 7446 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7447 rc = snd_ctl_add(card, ctl_mute); 7448 if (rc < 0) { 7449 pr_err("Failed to create ALSA mute control: %d\n", rc); 7450 goto err_exit; 7451 } 7452 data->ctl_mute_id = &ctl_mute->id; 7453 7454 rc = snd_card_register(card); 7455 if (rc < 0) { 7456 pr_err("Failed to register ALSA card: %d\n", rc); 7457 goto err_exit; 7458 } 7459 7460 alsa_card = card; 7461 return 0; 7462 7463 err_exit: 7464 snd_card_free(card); 7465 return 1; 7466 } 7467 7468 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7469 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7470 7471 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7472 /* Whitelist volume level on all IBM by default */ 7473 { .vendor = PCI_VENDOR_ID_IBM, 7474 .bios = TPACPI_MATCH_ANY, 7475 .ec = TPACPI_MATCH_ANY, 7476 .quirks = TPACPI_VOL_Q_LEVEL }, 7477 7478 /* Lenovo models with volume control (needs confirmation) */ 7479 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7480 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7481 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7482 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7483 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7484 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7485 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7486 7487 /* Whitelist mute-only on all Lenovo by default */ 7488 { .vendor = PCI_VENDOR_ID_LENOVO, 7489 .bios = TPACPI_MATCH_ANY, 7490 .ec = TPACPI_MATCH_ANY, 7491 .quirks = TPACPI_VOL_Q_MUTEONLY } 7492 }; 7493 7494 static int __init volume_init(struct ibm_init_struct *iibm) 7495 { 7496 unsigned long quirks; 7497 int rc; 7498 7499 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7500 7501 mutex_init(&volume_mutex); 7502 7503 /* 7504 * Check for module parameter bogosity, note that we 7505 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7506 * able to detect "unspecified" 7507 */ 7508 if (volume_mode > TPACPI_VOL_MODE_MAX) 7509 return -EINVAL; 7510 7511 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7512 pr_err("UCMS step volume mode not implemented, " 7513 "please contact %s\n", TPACPI_MAIL); 7514 return 1; 7515 } 7516 7517 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7518 return -EINVAL; 7519 7520 /* 7521 * The ALSA mixer is our primary interface. 7522 * When disabled, don't install the subdriver at all 7523 */ 7524 if (!alsa_enable) { 7525 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7526 "ALSA mixer disabled by parameter, " 7527 "not loading volume subdriver...\n"); 7528 return 1; 7529 } 7530 7531 quirks = tpacpi_check_quirks(volume_quirk_table, 7532 ARRAY_SIZE(volume_quirk_table)); 7533 7534 switch (volume_capabilities) { 7535 case TPACPI_VOL_CAP_AUTO: 7536 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7537 tp_features.mixer_no_level_control = 1; 7538 else if (quirks & TPACPI_VOL_Q_LEVEL) 7539 tp_features.mixer_no_level_control = 0; 7540 else 7541 return 1; /* no mixer */ 7542 break; 7543 case TPACPI_VOL_CAP_VOLMUTE: 7544 tp_features.mixer_no_level_control = 0; 7545 break; 7546 case TPACPI_VOL_CAP_MUTEONLY: 7547 tp_features.mixer_no_level_control = 1; 7548 break; 7549 default: 7550 return 1; 7551 } 7552 7553 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7554 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7555 "using user-supplied volume_capabilities=%d\n", 7556 volume_capabilities); 7557 7558 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7559 volume_mode == TPACPI_VOL_MODE_MAX) { 7560 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7561 7562 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7563 "driver auto-selected volume_mode=%d\n", 7564 volume_mode); 7565 } else { 7566 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7567 "using user-supplied volume_mode=%d\n", 7568 volume_mode); 7569 } 7570 7571 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7572 "mute is supported, volume control is %s\n", 7573 str_supported(!tp_features.mixer_no_level_control)); 7574 7575 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7576 software_mute_active = true; 7577 } else { 7578 rc = volume_create_alsa_mixer(); 7579 if (rc) { 7580 pr_err("Could not create the ALSA mixer interface\n"); 7581 return rc; 7582 } 7583 7584 pr_info("Console audio control enabled, mode: %s\n", 7585 (volume_control_allowed) ? 7586 "override (read/write)" : 7587 "monitor (read only)"); 7588 } 7589 7590 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7591 "registering volume hotkeys as change notification\n"); 7592 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7593 | TP_ACPI_HKEY_VOLUP_MASK 7594 | TP_ACPI_HKEY_VOLDWN_MASK 7595 | TP_ACPI_HKEY_MUTE_MASK); 7596 7597 return 0; 7598 } 7599 7600 static int volume_read(struct seq_file *m) 7601 { 7602 u8 status; 7603 7604 if (volume_get_status(&status) < 0) { 7605 seq_printf(m, "level:\t\tunreadable\n"); 7606 } else { 7607 if (tp_features.mixer_no_level_control) 7608 seq_printf(m, "level:\t\tunsupported\n"); 7609 else 7610 seq_printf(m, "level:\t\t%d\n", 7611 status & TP_EC_AUDIO_LVL_MSK); 7612 7613 seq_printf(m, "mute:\t\t%s\n", 7614 onoff(status, TP_EC_AUDIO_MUTESW)); 7615 7616 if (volume_control_allowed) { 7617 seq_printf(m, "commands:\tunmute, mute\n"); 7618 if (!tp_features.mixer_no_level_control) { 7619 seq_printf(m, 7620 "commands:\tup, down\n"); 7621 seq_printf(m, 7622 "commands:\tlevel <level>" 7623 " (<level> is 0-%d)\n", 7624 TP_EC_VOLUME_MAX); 7625 } 7626 } 7627 } 7628 7629 return 0; 7630 } 7631 7632 static int volume_write(char *buf) 7633 { 7634 u8 s; 7635 u8 new_level, new_mute; 7636 int l; 7637 char *cmd; 7638 int rc; 7639 7640 /* 7641 * We do allow volume control at driver startup, so that the 7642 * user can set initial state through the volume=... parameter hack. 7643 */ 7644 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7645 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7646 tp_warned.volume_ctrl_forbidden = 1; 7647 pr_notice("Console audio control in monitor mode, " 7648 "changes are not allowed\n"); 7649 pr_notice("Use the volume_control=1 module parameter " 7650 "to enable volume control\n"); 7651 } 7652 return -EPERM; 7653 } 7654 7655 rc = volume_get_status(&s); 7656 if (rc < 0) 7657 return rc; 7658 7659 new_level = s & TP_EC_AUDIO_LVL_MSK; 7660 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7661 7662 while ((cmd = next_cmd(&buf))) { 7663 if (!tp_features.mixer_no_level_control) { 7664 if (strlencmp(cmd, "up") == 0) { 7665 if (new_mute) 7666 new_mute = 0; 7667 else if (new_level < TP_EC_VOLUME_MAX) 7668 new_level++; 7669 continue; 7670 } else if (strlencmp(cmd, "down") == 0) { 7671 if (new_mute) 7672 new_mute = 0; 7673 else if (new_level > 0) 7674 new_level--; 7675 continue; 7676 } else if (sscanf(cmd, "level %u", &l) == 1 && 7677 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7678 new_level = l; 7679 continue; 7680 } 7681 } 7682 if (strlencmp(cmd, "mute") == 0) 7683 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7684 else if (strlencmp(cmd, "unmute") == 0) 7685 new_mute = 0; 7686 else 7687 return -EINVAL; 7688 } 7689 7690 if (tp_features.mixer_no_level_control) { 7691 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7692 new_mute ? "" : "un"); 7693 rc = volume_set_mute(!!new_mute); 7694 } else { 7695 tpacpi_disclose_usertask("procfs volume", 7696 "%smute and set level to %d\n", 7697 new_mute ? "" : "un", new_level); 7698 rc = volume_set_status(new_mute | new_level); 7699 } 7700 volume_alsa_notify_change(); 7701 7702 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7703 } 7704 7705 static struct ibm_struct volume_driver_data = { 7706 .name = "volume", 7707 .read = volume_read, 7708 .write = volume_write, 7709 .exit = volume_exit, 7710 .suspend = volume_suspend, 7711 .resume = volume_resume, 7712 .shutdown = volume_shutdown, 7713 }; 7714 7715 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7716 7717 #define alsa_card NULL 7718 7719 static void inline volume_alsa_notify_change(void) 7720 { 7721 } 7722 7723 static int __init volume_init(struct ibm_init_struct *iibm) 7724 { 7725 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7726 7727 return 1; 7728 } 7729 7730 static struct ibm_struct volume_driver_data = { 7731 .name = "volume", 7732 }; 7733 7734 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7735 7736 /************************************************************************* 7737 * Fan subdriver 7738 */ 7739 7740 /* 7741 * FAN ACCESS MODES 7742 * 7743 * TPACPI_FAN_RD_ACPI_GFAN: 7744 * ACPI GFAN method: returns fan level 7745 * 7746 * see TPACPI_FAN_WR_ACPI_SFAN 7747 * EC 0x2f (HFSP) not available if GFAN exists 7748 * 7749 * TPACPI_FAN_WR_ACPI_SFAN: 7750 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7751 * 7752 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7753 * it for writing. 7754 * 7755 * TPACPI_FAN_WR_TPEC: 7756 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7757 * Supported on almost all ThinkPads 7758 * 7759 * Fan speed changes of any sort (including those caused by the 7760 * disengaged mode) are usually done slowly by the firmware as the 7761 * maximum amount of fan duty cycle change per second seems to be 7762 * limited. 7763 * 7764 * Reading is not available if GFAN exists. 7765 * Writing is not available if SFAN exists. 7766 * 7767 * Bits 7768 * 7 automatic mode engaged; 7769 * (default operation mode of the ThinkPad) 7770 * fan level is ignored in this mode. 7771 * 6 full speed mode (takes precedence over bit 7); 7772 * not available on all thinkpads. May disable 7773 * the tachometer while the fan controller ramps up 7774 * the speed (which can take up to a few *minutes*). 7775 * Speeds up fan to 100% duty-cycle, which is far above 7776 * the standard RPM levels. It is not impossible that 7777 * it could cause hardware damage. 7778 * 5-3 unused in some models. Extra bits for fan level 7779 * in others, but still useless as all values above 7780 * 7 map to the same speed as level 7 in these models. 7781 * 2-0 fan level (0..7 usually) 7782 * 0x00 = stop 7783 * 0x07 = max (set when temperatures critical) 7784 * Some ThinkPads may have other levels, see 7785 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7786 * 7787 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7788 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7789 * does so, its initial value is meaningless (0x07). 7790 * 7791 * For firmware bugs, refer to: 7792 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7793 * 7794 * ---- 7795 * 7796 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7797 * Main fan tachometer reading (in RPM) 7798 * 7799 * This register is present on all ThinkPads with a new-style EC, and 7800 * it is known not to be present on the A21m/e, and T22, as there is 7801 * something else in offset 0x84 according to the ACPI DSDT. Other 7802 * ThinkPads from this same time period (and earlier) probably lack the 7803 * tachometer as well. 7804 * 7805 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7806 * was never fixed by IBM to report the EC firmware version string 7807 * probably support the tachometer (like the early X models), so 7808 * detecting it is quite hard. We need more data to know for sure. 7809 * 7810 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7811 * might result. 7812 * 7813 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7814 * mode. 7815 * 7816 * For firmware bugs, refer to: 7817 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7818 * 7819 * ---- 7820 * 7821 * ThinkPad EC register 0x31 bit 0 (only on select models) 7822 * 7823 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7824 * show the speed of the main fan. When bit 0 of EC register 0x31 7825 * is one, the tachometer registers show the speed of the auxiliary 7826 * fan. 7827 * 7828 * Fan control seems to affect both fans, regardless of the state 7829 * of this bit. 7830 * 7831 * So far, only the firmware for the X60/X61 non-tablet versions 7832 * seem to support this (firmware TP-7M). 7833 * 7834 * TPACPI_FAN_WR_ACPI_FANS: 7835 * ThinkPad X31, X40, X41. Not available in the X60. 7836 * 7837 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7838 * high speed. ACPI DSDT seems to map these three speeds to levels 7839 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7840 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7841 * 7842 * The speeds are stored on handles 7843 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7844 * 7845 * There are three default speed sets, accessible as handles: 7846 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7847 * 7848 * ACPI DSDT switches which set is in use depending on various 7849 * factors. 7850 * 7851 * TPACPI_FAN_WR_TPEC is also available and should be used to 7852 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7853 * but the ACPI tables just mention level 7. 7854 */ 7855 7856 enum { /* Fan control constants */ 7857 fan_status_offset = 0x2f, /* EC register 0x2f */ 7858 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7859 * 0x84 must be read before 0x85 */ 7860 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7861 bit 0 selects which fan is active */ 7862 7863 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7864 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7865 7866 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7867 }; 7868 7869 enum fan_status_access_mode { 7870 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7871 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7872 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7873 }; 7874 7875 enum fan_control_access_mode { 7876 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7877 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7878 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7879 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7880 }; 7881 7882 enum fan_control_commands { 7883 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7884 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7885 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7886 * and also watchdog cmd */ 7887 }; 7888 7889 static bool fan_control_allowed; 7890 7891 static enum fan_status_access_mode fan_status_access_mode; 7892 static enum fan_control_access_mode fan_control_access_mode; 7893 static enum fan_control_commands fan_control_commands; 7894 7895 static u8 fan_control_initial_status; 7896 static u8 fan_control_desired_level; 7897 static u8 fan_control_resume_level; 7898 static int fan_watchdog_maxinterval; 7899 7900 static struct mutex fan_mutex; 7901 7902 static void fan_watchdog_fire(struct work_struct *ignored); 7903 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7904 7905 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7906 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7907 "\\FSPD", /* 600e/x, 770e, 770x */ 7908 ); /* all others */ 7909 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7910 "JFNS", /* 770x-JL */ 7911 ); /* all others */ 7912 7913 /* 7914 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7915 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7916 * be in auto mode (0x80). 7917 * 7918 * This is corrected by any write to HFSP either by the driver, or 7919 * by the firmware. 7920 * 7921 * We assume 0x07 really means auto mode while this quirk is active, 7922 * as this is far more likely than the ThinkPad being in level 7, 7923 * which is only used by the firmware during thermal emergencies. 7924 * 7925 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7926 * TP-70 (T43, R52), which are known to be buggy. 7927 */ 7928 7929 static void fan_quirk1_setup(void) 7930 { 7931 if (fan_control_initial_status == 0x07) { 7932 pr_notice("fan_init: initial fan status is unknown, " 7933 "assuming it is in auto mode\n"); 7934 tp_features.fan_ctrl_status_undef = 1; 7935 } 7936 } 7937 7938 static void fan_quirk1_handle(u8 *fan_status) 7939 { 7940 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7941 if (*fan_status != fan_control_initial_status) { 7942 /* something changed the HFSP regisnter since 7943 * driver init time, so it is not undefined 7944 * anymore */ 7945 tp_features.fan_ctrl_status_undef = 0; 7946 } else { 7947 /* Return most likely status. In fact, it 7948 * might be the only possible status */ 7949 *fan_status = TP_EC_FAN_AUTO; 7950 } 7951 } 7952 } 7953 7954 /* Select main fan on X60/X61, NOOP on others */ 7955 static bool fan_select_fan1(void) 7956 { 7957 if (tp_features.second_fan) { 7958 u8 val; 7959 7960 if (ec_read(fan_select_offset, &val) < 0) 7961 return false; 7962 val &= 0xFEU; 7963 if (ec_write(fan_select_offset, val) < 0) 7964 return false; 7965 } 7966 return true; 7967 } 7968 7969 /* Select secondary fan on X60/X61 */ 7970 static bool fan_select_fan2(void) 7971 { 7972 u8 val; 7973 7974 if (!tp_features.second_fan) 7975 return false; 7976 7977 if (ec_read(fan_select_offset, &val) < 0) 7978 return false; 7979 val |= 0x01U; 7980 if (ec_write(fan_select_offset, val) < 0) 7981 return false; 7982 7983 return true; 7984 } 7985 7986 /* 7987 * Call with fan_mutex held 7988 */ 7989 static void fan_update_desired_level(u8 status) 7990 { 7991 if ((status & 7992 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7993 if (status > 7) 7994 fan_control_desired_level = 7; 7995 else 7996 fan_control_desired_level = status; 7997 } 7998 } 7999 8000 static int fan_get_status(u8 *status) 8001 { 8002 u8 s; 8003 8004 /* TODO: 8005 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8006 8007 switch (fan_status_access_mode) { 8008 case TPACPI_FAN_RD_ACPI_GFAN: { 8009 /* 570, 600e/x, 770e, 770x */ 8010 int res; 8011 8012 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8013 return -EIO; 8014 8015 if (likely(status)) 8016 *status = res & 0x07; 8017 8018 break; 8019 } 8020 case TPACPI_FAN_RD_TPEC: 8021 /* all except 570, 600e/x, 770e, 770x */ 8022 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8023 return -EIO; 8024 8025 if (likely(status)) { 8026 *status = s; 8027 fan_quirk1_handle(status); 8028 } 8029 8030 break; 8031 8032 default: 8033 return -ENXIO; 8034 } 8035 8036 return 0; 8037 } 8038 8039 static int fan_get_status_safe(u8 *status) 8040 { 8041 int rc; 8042 u8 s; 8043 8044 if (mutex_lock_killable(&fan_mutex)) 8045 return -ERESTARTSYS; 8046 rc = fan_get_status(&s); 8047 if (!rc) 8048 fan_update_desired_level(s); 8049 mutex_unlock(&fan_mutex); 8050 8051 if (rc) 8052 return rc; 8053 if (status) 8054 *status = s; 8055 8056 return 0; 8057 } 8058 8059 static int fan_get_speed(unsigned int *speed) 8060 { 8061 u8 hi, lo; 8062 8063 switch (fan_status_access_mode) { 8064 case TPACPI_FAN_RD_TPEC: 8065 /* all except 570, 600e/x, 770e, 770x */ 8066 if (unlikely(!fan_select_fan1())) 8067 return -EIO; 8068 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8069 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8070 return -EIO; 8071 8072 if (likely(speed)) 8073 *speed = (hi << 8) | lo; 8074 8075 break; 8076 8077 default: 8078 return -ENXIO; 8079 } 8080 8081 return 0; 8082 } 8083 8084 static int fan2_get_speed(unsigned int *speed) 8085 { 8086 u8 hi, lo; 8087 bool rc; 8088 8089 switch (fan_status_access_mode) { 8090 case TPACPI_FAN_RD_TPEC: 8091 /* all except 570, 600e/x, 770e, 770x */ 8092 if (unlikely(!fan_select_fan2())) 8093 return -EIO; 8094 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8095 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8096 fan_select_fan1(); /* play it safe */ 8097 if (rc) 8098 return -EIO; 8099 8100 if (likely(speed)) 8101 *speed = (hi << 8) | lo; 8102 8103 break; 8104 8105 default: 8106 return -ENXIO; 8107 } 8108 8109 return 0; 8110 } 8111 8112 static int fan_set_level(int level) 8113 { 8114 if (!fan_control_allowed) 8115 return -EPERM; 8116 8117 switch (fan_control_access_mode) { 8118 case TPACPI_FAN_WR_ACPI_SFAN: 8119 if (level >= 0 && level <= 7) { 8120 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8121 return -EIO; 8122 } else 8123 return -EINVAL; 8124 break; 8125 8126 case TPACPI_FAN_WR_ACPI_FANS: 8127 case TPACPI_FAN_WR_TPEC: 8128 if (!(level & TP_EC_FAN_AUTO) && 8129 !(level & TP_EC_FAN_FULLSPEED) && 8130 ((level < 0) || (level > 7))) 8131 return -EINVAL; 8132 8133 /* safety net should the EC not support AUTO 8134 * or FULLSPEED mode bits and just ignore them */ 8135 if (level & TP_EC_FAN_FULLSPEED) 8136 level |= 7; /* safety min speed 7 */ 8137 else if (level & TP_EC_FAN_AUTO) 8138 level |= 4; /* safety min speed 4 */ 8139 8140 if (!acpi_ec_write(fan_status_offset, level)) 8141 return -EIO; 8142 else 8143 tp_features.fan_ctrl_status_undef = 0; 8144 break; 8145 8146 default: 8147 return -ENXIO; 8148 } 8149 8150 vdbg_printk(TPACPI_DBG_FAN, 8151 "fan control: set fan control register to 0x%02x\n", level); 8152 return 0; 8153 } 8154 8155 static int fan_set_level_safe(int level) 8156 { 8157 int rc; 8158 8159 if (!fan_control_allowed) 8160 return -EPERM; 8161 8162 if (mutex_lock_killable(&fan_mutex)) 8163 return -ERESTARTSYS; 8164 8165 if (level == TPACPI_FAN_LAST_LEVEL) 8166 level = fan_control_desired_level; 8167 8168 rc = fan_set_level(level); 8169 if (!rc) 8170 fan_update_desired_level(level); 8171 8172 mutex_unlock(&fan_mutex); 8173 return rc; 8174 } 8175 8176 static int fan_set_enable(void) 8177 { 8178 u8 s; 8179 int rc; 8180 8181 if (!fan_control_allowed) 8182 return -EPERM; 8183 8184 if (mutex_lock_killable(&fan_mutex)) 8185 return -ERESTARTSYS; 8186 8187 switch (fan_control_access_mode) { 8188 case TPACPI_FAN_WR_ACPI_FANS: 8189 case TPACPI_FAN_WR_TPEC: 8190 rc = fan_get_status(&s); 8191 if (rc < 0) 8192 break; 8193 8194 /* Don't go out of emergency fan mode */ 8195 if (s != 7) { 8196 s &= 0x07; 8197 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8198 } 8199 8200 if (!acpi_ec_write(fan_status_offset, s)) 8201 rc = -EIO; 8202 else { 8203 tp_features.fan_ctrl_status_undef = 0; 8204 rc = 0; 8205 } 8206 break; 8207 8208 case TPACPI_FAN_WR_ACPI_SFAN: 8209 rc = fan_get_status(&s); 8210 if (rc < 0) 8211 break; 8212 8213 s &= 0x07; 8214 8215 /* Set fan to at least level 4 */ 8216 s |= 4; 8217 8218 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8219 rc = -EIO; 8220 else 8221 rc = 0; 8222 break; 8223 8224 default: 8225 rc = -ENXIO; 8226 } 8227 8228 mutex_unlock(&fan_mutex); 8229 8230 if (!rc) 8231 vdbg_printk(TPACPI_DBG_FAN, 8232 "fan control: set fan control register to 0x%02x\n", 8233 s); 8234 return rc; 8235 } 8236 8237 static int fan_set_disable(void) 8238 { 8239 int rc; 8240 8241 if (!fan_control_allowed) 8242 return -EPERM; 8243 8244 if (mutex_lock_killable(&fan_mutex)) 8245 return -ERESTARTSYS; 8246 8247 rc = 0; 8248 switch (fan_control_access_mode) { 8249 case TPACPI_FAN_WR_ACPI_FANS: 8250 case TPACPI_FAN_WR_TPEC: 8251 if (!acpi_ec_write(fan_status_offset, 0x00)) 8252 rc = -EIO; 8253 else { 8254 fan_control_desired_level = 0; 8255 tp_features.fan_ctrl_status_undef = 0; 8256 } 8257 break; 8258 8259 case TPACPI_FAN_WR_ACPI_SFAN: 8260 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8261 rc = -EIO; 8262 else 8263 fan_control_desired_level = 0; 8264 break; 8265 8266 default: 8267 rc = -ENXIO; 8268 } 8269 8270 if (!rc) 8271 vdbg_printk(TPACPI_DBG_FAN, 8272 "fan control: set fan control register to 0\n"); 8273 8274 mutex_unlock(&fan_mutex); 8275 return rc; 8276 } 8277 8278 static int fan_set_speed(int speed) 8279 { 8280 int rc; 8281 8282 if (!fan_control_allowed) 8283 return -EPERM; 8284 8285 if (mutex_lock_killable(&fan_mutex)) 8286 return -ERESTARTSYS; 8287 8288 rc = 0; 8289 switch (fan_control_access_mode) { 8290 case TPACPI_FAN_WR_ACPI_FANS: 8291 if (speed >= 0 && speed <= 65535) { 8292 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8293 speed, speed, speed)) 8294 rc = -EIO; 8295 } else 8296 rc = -EINVAL; 8297 break; 8298 8299 default: 8300 rc = -ENXIO; 8301 } 8302 8303 mutex_unlock(&fan_mutex); 8304 return rc; 8305 } 8306 8307 static void fan_watchdog_reset(void) 8308 { 8309 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8310 return; 8311 8312 if (fan_watchdog_maxinterval > 0 && 8313 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8314 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8315 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8316 else 8317 cancel_delayed_work(&fan_watchdog_task); 8318 } 8319 8320 static void fan_watchdog_fire(struct work_struct *ignored) 8321 { 8322 int rc; 8323 8324 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8325 return; 8326 8327 pr_notice("fan watchdog: enabling fan\n"); 8328 rc = fan_set_enable(); 8329 if (rc < 0) { 8330 pr_err("fan watchdog: error %d while enabling fan, " 8331 "will try again later...\n", -rc); 8332 /* reschedule for later */ 8333 fan_watchdog_reset(); 8334 } 8335 } 8336 8337 /* 8338 * SYSFS fan layout: hwmon compatible (device) 8339 * 8340 * pwm*_enable: 8341 * 0: "disengaged" mode 8342 * 1: manual mode 8343 * 2: native EC "auto" mode (recommended, hardware default) 8344 * 8345 * pwm*: set speed in manual mode, ignored otherwise. 8346 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8347 * interpolation. 8348 * 8349 * fan*_input: tachometer reading, RPM 8350 * 8351 * 8352 * SYSFS fan layout: extensions 8353 * 8354 * fan_watchdog (driver): 8355 * fan watchdog interval in seconds, 0 disables (default), max 120 8356 */ 8357 8358 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8359 static ssize_t fan_pwm1_enable_show(struct device *dev, 8360 struct device_attribute *attr, 8361 char *buf) 8362 { 8363 int res, mode; 8364 u8 status; 8365 8366 res = fan_get_status_safe(&status); 8367 if (res) 8368 return res; 8369 8370 if (status & TP_EC_FAN_FULLSPEED) { 8371 mode = 0; 8372 } else if (status & TP_EC_FAN_AUTO) { 8373 mode = 2; 8374 } else 8375 mode = 1; 8376 8377 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8378 } 8379 8380 static ssize_t fan_pwm1_enable_store(struct device *dev, 8381 struct device_attribute *attr, 8382 const char *buf, size_t count) 8383 { 8384 unsigned long t; 8385 int res, level; 8386 8387 if (parse_strtoul(buf, 2, &t)) 8388 return -EINVAL; 8389 8390 tpacpi_disclose_usertask("hwmon pwm1_enable", 8391 "set fan mode to %lu\n", t); 8392 8393 switch (t) { 8394 case 0: 8395 level = TP_EC_FAN_FULLSPEED; 8396 break; 8397 case 1: 8398 level = TPACPI_FAN_LAST_LEVEL; 8399 break; 8400 case 2: 8401 level = TP_EC_FAN_AUTO; 8402 break; 8403 case 3: 8404 /* reserved for software-controlled auto mode */ 8405 return -ENOSYS; 8406 default: 8407 return -EINVAL; 8408 } 8409 8410 res = fan_set_level_safe(level); 8411 if (res == -ENXIO) 8412 return -EINVAL; 8413 else if (res < 0) 8414 return res; 8415 8416 fan_watchdog_reset(); 8417 8418 return count; 8419 } 8420 8421 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8422 fan_pwm1_enable_show, fan_pwm1_enable_store); 8423 8424 /* sysfs fan pwm1 ------------------------------------------------------ */ 8425 static ssize_t fan_pwm1_show(struct device *dev, 8426 struct device_attribute *attr, 8427 char *buf) 8428 { 8429 int res; 8430 u8 status; 8431 8432 res = fan_get_status_safe(&status); 8433 if (res) 8434 return res; 8435 8436 if ((status & 8437 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8438 status = fan_control_desired_level; 8439 8440 if (status > 7) 8441 status = 7; 8442 8443 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8444 } 8445 8446 static ssize_t fan_pwm1_store(struct device *dev, 8447 struct device_attribute *attr, 8448 const char *buf, size_t count) 8449 { 8450 unsigned long s; 8451 int rc; 8452 u8 status, newlevel; 8453 8454 if (parse_strtoul(buf, 255, &s)) 8455 return -EINVAL; 8456 8457 tpacpi_disclose_usertask("hwmon pwm1", 8458 "set fan speed to %lu\n", s); 8459 8460 /* scale down from 0-255 to 0-7 */ 8461 newlevel = (s >> 5) & 0x07; 8462 8463 if (mutex_lock_killable(&fan_mutex)) 8464 return -ERESTARTSYS; 8465 8466 rc = fan_get_status(&status); 8467 if (!rc && (status & 8468 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8469 rc = fan_set_level(newlevel); 8470 if (rc == -ENXIO) 8471 rc = -EINVAL; 8472 else if (!rc) { 8473 fan_update_desired_level(newlevel); 8474 fan_watchdog_reset(); 8475 } 8476 } 8477 8478 mutex_unlock(&fan_mutex); 8479 return (rc) ? rc : count; 8480 } 8481 8482 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8483 8484 /* sysfs fan fan1_input ------------------------------------------------ */ 8485 static ssize_t fan_fan1_input_show(struct device *dev, 8486 struct device_attribute *attr, 8487 char *buf) 8488 { 8489 int res; 8490 unsigned int speed; 8491 8492 res = fan_get_speed(&speed); 8493 if (res < 0) 8494 return res; 8495 8496 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8497 } 8498 8499 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8500 8501 /* sysfs fan fan2_input ------------------------------------------------ */ 8502 static ssize_t fan_fan2_input_show(struct device *dev, 8503 struct device_attribute *attr, 8504 char *buf) 8505 { 8506 int res; 8507 unsigned int speed; 8508 8509 res = fan2_get_speed(&speed); 8510 if (res < 0) 8511 return res; 8512 8513 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8514 } 8515 8516 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8517 8518 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8519 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 8520 char *buf) 8521 { 8522 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8523 } 8524 8525 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 8526 const char *buf, size_t count) 8527 { 8528 unsigned long t; 8529 8530 if (parse_strtoul(buf, 120, &t)) 8531 return -EINVAL; 8532 8533 if (!fan_control_allowed) 8534 return -EPERM; 8535 8536 fan_watchdog_maxinterval = t; 8537 fan_watchdog_reset(); 8538 8539 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8540 8541 return count; 8542 } 8543 8544 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 8545 fan_fan_watchdog_show, fan_fan_watchdog_store); 8546 8547 /* --------------------------------------------------------------------- */ 8548 static struct attribute *fan_attributes[] = { 8549 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8550 &dev_attr_fan1_input.attr, 8551 NULL, /* for fan2_input */ 8552 NULL 8553 }; 8554 8555 static const struct attribute_group fan_attr_group = { 8556 .attrs = fan_attributes, 8557 }; 8558 8559 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8560 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8561 8562 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 8563 { .vendor = PCI_VENDOR_ID_IBM, \ 8564 .bios = TPACPI_MATCH_ANY, \ 8565 .ec = TPID(__id1, __id2), \ 8566 .quirks = __quirks } 8567 8568 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 8569 { .vendor = PCI_VENDOR_ID_LENOVO, \ 8570 .bios = TPACPI_MATCH_ANY, \ 8571 .ec = TPID(__id1, __id2), \ 8572 .quirks = __quirks } 8573 8574 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8575 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 8576 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 8577 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 8578 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 8579 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 8580 }; 8581 8582 #undef TPACPI_FAN_QL 8583 #undef TPACPI_FAN_QI 8584 8585 static int __init fan_init(struct ibm_init_struct *iibm) 8586 { 8587 int rc; 8588 unsigned long quirks; 8589 8590 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8591 "initializing fan subdriver\n"); 8592 8593 mutex_init(&fan_mutex); 8594 fan_status_access_mode = TPACPI_FAN_NONE; 8595 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8596 fan_control_commands = 0; 8597 fan_watchdog_maxinterval = 0; 8598 tp_features.fan_ctrl_status_undef = 0; 8599 tp_features.second_fan = 0; 8600 fan_control_desired_level = 7; 8601 8602 if (tpacpi_is_ibm()) { 8603 TPACPI_ACPIHANDLE_INIT(fans); 8604 TPACPI_ACPIHANDLE_INIT(gfan); 8605 TPACPI_ACPIHANDLE_INIT(sfan); 8606 } 8607 8608 quirks = tpacpi_check_quirks(fan_quirk_table, 8609 ARRAY_SIZE(fan_quirk_table)); 8610 8611 if (gfan_handle) { 8612 /* 570, 600e/x, 770e, 770x */ 8613 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8614 } else { 8615 /* all other ThinkPads: note that even old-style 8616 * ThinkPad ECs supports the fan control register */ 8617 if (likely(acpi_ec_read(fan_status_offset, 8618 &fan_control_initial_status))) { 8619 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8620 if (quirks & TPACPI_FAN_Q1) 8621 fan_quirk1_setup(); 8622 if (quirks & TPACPI_FAN_2FAN) { 8623 tp_features.second_fan = 1; 8624 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8625 "secondary fan support enabled\n"); 8626 } 8627 } else { 8628 pr_err("ThinkPad ACPI EC access misbehaving, " 8629 "fan status and control unavailable\n"); 8630 return 1; 8631 } 8632 } 8633 8634 if (sfan_handle) { 8635 /* 570, 770x-JL */ 8636 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8637 fan_control_commands |= 8638 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8639 } else { 8640 if (!gfan_handle) { 8641 /* gfan without sfan means no fan control */ 8642 /* all other models implement TP EC 0x2f control */ 8643 8644 if (fans_handle) { 8645 /* X31, X40, X41 */ 8646 fan_control_access_mode = 8647 TPACPI_FAN_WR_ACPI_FANS; 8648 fan_control_commands |= 8649 TPACPI_FAN_CMD_SPEED | 8650 TPACPI_FAN_CMD_LEVEL | 8651 TPACPI_FAN_CMD_ENABLE; 8652 } else { 8653 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8654 fan_control_commands |= 8655 TPACPI_FAN_CMD_LEVEL | 8656 TPACPI_FAN_CMD_ENABLE; 8657 } 8658 } 8659 } 8660 8661 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8662 "fan is %s, modes %d, %d\n", 8663 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8664 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8665 fan_status_access_mode, fan_control_access_mode); 8666 8667 /* fan control master switch */ 8668 if (!fan_control_allowed) { 8669 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8670 fan_control_commands = 0; 8671 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8672 "fan control features disabled by parameter\n"); 8673 } 8674 8675 /* update fan_control_desired_level */ 8676 if (fan_status_access_mode != TPACPI_FAN_NONE) 8677 fan_get_status_safe(NULL); 8678 8679 if (fan_status_access_mode != TPACPI_FAN_NONE || 8680 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8681 if (tp_features.second_fan) { 8682 /* attach second fan tachometer */ 8683 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8684 &dev_attr_fan2_input.attr; 8685 } 8686 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8687 &fan_attr_group); 8688 if (rc < 0) 8689 return rc; 8690 8691 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8692 &driver_attr_fan_watchdog); 8693 if (rc < 0) { 8694 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8695 &fan_attr_group); 8696 return rc; 8697 } 8698 return 0; 8699 } else 8700 return 1; 8701 } 8702 8703 static void fan_exit(void) 8704 { 8705 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8706 "cancelling any pending fan watchdog tasks\n"); 8707 8708 /* FIXME: can we really do this unconditionally? */ 8709 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8710 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8711 &driver_attr_fan_watchdog); 8712 8713 cancel_delayed_work(&fan_watchdog_task); 8714 flush_workqueue(tpacpi_wq); 8715 } 8716 8717 static void fan_suspend(void) 8718 { 8719 int rc; 8720 8721 if (!fan_control_allowed) 8722 return; 8723 8724 /* Store fan status in cache */ 8725 fan_control_resume_level = 0; 8726 rc = fan_get_status_safe(&fan_control_resume_level); 8727 if (rc < 0) 8728 pr_notice("failed to read fan level for later " 8729 "restore during resume: %d\n", rc); 8730 8731 /* if it is undefined, don't attempt to restore it. 8732 * KEEP THIS LAST */ 8733 if (tp_features.fan_ctrl_status_undef) 8734 fan_control_resume_level = 0; 8735 } 8736 8737 static void fan_resume(void) 8738 { 8739 u8 current_level = 7; 8740 bool do_set = false; 8741 int rc; 8742 8743 /* DSDT *always* updates status on resume */ 8744 tp_features.fan_ctrl_status_undef = 0; 8745 8746 if (!fan_control_allowed || 8747 !fan_control_resume_level || 8748 (fan_get_status_safe(¤t_level) < 0)) 8749 return; 8750 8751 switch (fan_control_access_mode) { 8752 case TPACPI_FAN_WR_ACPI_SFAN: 8753 /* never decrease fan level */ 8754 do_set = (fan_control_resume_level > current_level); 8755 break; 8756 case TPACPI_FAN_WR_ACPI_FANS: 8757 case TPACPI_FAN_WR_TPEC: 8758 /* never decrease fan level, scale is: 8759 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8760 * 8761 * We expect the firmware to set either 7 or AUTO, but we 8762 * handle FULLSPEED out of paranoia. 8763 * 8764 * So, we can safely only restore FULLSPEED or 7, anything 8765 * else could slow the fan. Restoring AUTO is useless, at 8766 * best that's exactly what the DSDT already set (it is the 8767 * slower it uses). 8768 * 8769 * Always keep in mind that the DSDT *will* have set the 8770 * fans to what the vendor supposes is the best level. We 8771 * muck with it only to speed the fan up. 8772 */ 8773 if (fan_control_resume_level != 7 && 8774 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8775 return; 8776 else 8777 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8778 (current_level != fan_control_resume_level); 8779 break; 8780 default: 8781 return; 8782 } 8783 if (do_set) { 8784 pr_notice("restoring fan level to 0x%02x\n", 8785 fan_control_resume_level); 8786 rc = fan_set_level_safe(fan_control_resume_level); 8787 if (rc < 0) 8788 pr_notice("failed to restore fan level: %d\n", rc); 8789 } 8790 } 8791 8792 static int fan_read(struct seq_file *m) 8793 { 8794 int rc; 8795 u8 status; 8796 unsigned int speed = 0; 8797 8798 switch (fan_status_access_mode) { 8799 case TPACPI_FAN_RD_ACPI_GFAN: 8800 /* 570, 600e/x, 770e, 770x */ 8801 rc = fan_get_status_safe(&status); 8802 if (rc < 0) 8803 return rc; 8804 8805 seq_printf(m, "status:\t\t%s\n" 8806 "level:\t\t%d\n", 8807 (status != 0) ? "enabled" : "disabled", status); 8808 break; 8809 8810 case TPACPI_FAN_RD_TPEC: 8811 /* all except 570, 600e/x, 770e, 770x */ 8812 rc = fan_get_status_safe(&status); 8813 if (rc < 0) 8814 return rc; 8815 8816 seq_printf(m, "status:\t\t%s\n", 8817 (status != 0) ? "enabled" : "disabled"); 8818 8819 rc = fan_get_speed(&speed); 8820 if (rc < 0) 8821 return rc; 8822 8823 seq_printf(m, "speed:\t\t%d\n", speed); 8824 8825 if (status & TP_EC_FAN_FULLSPEED) 8826 /* Disengaged mode takes precedence */ 8827 seq_printf(m, "level:\t\tdisengaged\n"); 8828 else if (status & TP_EC_FAN_AUTO) 8829 seq_printf(m, "level:\t\tauto\n"); 8830 else 8831 seq_printf(m, "level:\t\t%d\n", status); 8832 break; 8833 8834 case TPACPI_FAN_NONE: 8835 default: 8836 seq_printf(m, "status:\t\tnot supported\n"); 8837 } 8838 8839 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8840 seq_printf(m, "commands:\tlevel <level>"); 8841 8842 switch (fan_control_access_mode) { 8843 case TPACPI_FAN_WR_ACPI_SFAN: 8844 seq_printf(m, " (<level> is 0-7)\n"); 8845 break; 8846 8847 default: 8848 seq_printf(m, " (<level> is 0-7, " 8849 "auto, disengaged, full-speed)\n"); 8850 break; 8851 } 8852 } 8853 8854 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8855 seq_printf(m, "commands:\tenable, disable\n" 8856 "commands:\twatchdog <timeout> (<timeout> " 8857 "is 0 (off), 1-120 (seconds))\n"); 8858 8859 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8860 seq_printf(m, "commands:\tspeed <speed>" 8861 " (<speed> is 0-65535)\n"); 8862 8863 return 0; 8864 } 8865 8866 static int fan_write_cmd_level(const char *cmd, int *rc) 8867 { 8868 int level; 8869 8870 if (strlencmp(cmd, "level auto") == 0) 8871 level = TP_EC_FAN_AUTO; 8872 else if ((strlencmp(cmd, "level disengaged") == 0) | 8873 (strlencmp(cmd, "level full-speed") == 0)) 8874 level = TP_EC_FAN_FULLSPEED; 8875 else if (sscanf(cmd, "level %d", &level) != 1) 8876 return 0; 8877 8878 *rc = fan_set_level_safe(level); 8879 if (*rc == -ENXIO) 8880 pr_err("level command accepted for unsupported access mode %d\n", 8881 fan_control_access_mode); 8882 else if (!*rc) 8883 tpacpi_disclose_usertask("procfs fan", 8884 "set level to %d\n", level); 8885 8886 return 1; 8887 } 8888 8889 static int fan_write_cmd_enable(const char *cmd, int *rc) 8890 { 8891 if (strlencmp(cmd, "enable") != 0) 8892 return 0; 8893 8894 *rc = fan_set_enable(); 8895 if (*rc == -ENXIO) 8896 pr_err("enable command accepted for unsupported access mode %d\n", 8897 fan_control_access_mode); 8898 else if (!*rc) 8899 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8900 8901 return 1; 8902 } 8903 8904 static int fan_write_cmd_disable(const char *cmd, int *rc) 8905 { 8906 if (strlencmp(cmd, "disable") != 0) 8907 return 0; 8908 8909 *rc = fan_set_disable(); 8910 if (*rc == -ENXIO) 8911 pr_err("disable command accepted for unsupported access mode %d\n", 8912 fan_control_access_mode); 8913 else if (!*rc) 8914 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8915 8916 return 1; 8917 } 8918 8919 static int fan_write_cmd_speed(const char *cmd, int *rc) 8920 { 8921 int speed; 8922 8923 /* TODO: 8924 * Support speed <low> <medium> <high> ? */ 8925 8926 if (sscanf(cmd, "speed %d", &speed) != 1) 8927 return 0; 8928 8929 *rc = fan_set_speed(speed); 8930 if (*rc == -ENXIO) 8931 pr_err("speed command accepted for unsupported access mode %d\n", 8932 fan_control_access_mode); 8933 else if (!*rc) 8934 tpacpi_disclose_usertask("procfs fan", 8935 "set speed to %d\n", speed); 8936 8937 return 1; 8938 } 8939 8940 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8941 { 8942 int interval; 8943 8944 if (sscanf(cmd, "watchdog %d", &interval) != 1) 8945 return 0; 8946 8947 if (interval < 0 || interval > 120) 8948 *rc = -EINVAL; 8949 else { 8950 fan_watchdog_maxinterval = interval; 8951 tpacpi_disclose_usertask("procfs fan", 8952 "set watchdog timer to %d\n", 8953 interval); 8954 } 8955 8956 return 1; 8957 } 8958 8959 static int fan_write(char *buf) 8960 { 8961 char *cmd; 8962 int rc = 0; 8963 8964 while (!rc && (cmd = next_cmd(&buf))) { 8965 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 8966 fan_write_cmd_level(cmd, &rc)) && 8967 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 8968 (fan_write_cmd_enable(cmd, &rc) || 8969 fan_write_cmd_disable(cmd, &rc) || 8970 fan_write_cmd_watchdog(cmd, &rc))) && 8971 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 8972 fan_write_cmd_speed(cmd, &rc)) 8973 ) 8974 rc = -EINVAL; 8975 else if (!rc) 8976 fan_watchdog_reset(); 8977 } 8978 8979 return rc; 8980 } 8981 8982 static struct ibm_struct fan_driver_data = { 8983 .name = "fan", 8984 .read = fan_read, 8985 .write = fan_write, 8986 .exit = fan_exit, 8987 .suspend = fan_suspend, 8988 .resume = fan_resume, 8989 }; 8990 8991 /************************************************************************* 8992 * Mute LED subdriver 8993 */ 8994 8995 8996 struct tp_led_table { 8997 acpi_string name; 8998 int on_value; 8999 int off_value; 9000 int state; 9001 }; 9002 9003 static struct tp_led_table led_tables[] = { 9004 [TPACPI_LED_MUTE] = { 9005 .name = "SSMS", 9006 .on_value = 1, 9007 .off_value = 0, 9008 }, 9009 [TPACPI_LED_MICMUTE] = { 9010 .name = "MMTS", 9011 .on_value = 2, 9012 .off_value = 0, 9013 }, 9014 }; 9015 9016 static int mute_led_on_off(struct tp_led_table *t, bool state) 9017 { 9018 acpi_handle temp; 9019 int output; 9020 9021 if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) { 9022 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9023 return -EIO; 9024 } 9025 9026 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9027 state ? t->on_value : t->off_value)) 9028 return -EIO; 9029 9030 t->state = state; 9031 return state; 9032 } 9033 9034 int tpacpi_led_set(int whichled, bool on) 9035 { 9036 struct tp_led_table *t; 9037 9038 if (whichled < 0 || whichled >= TPACPI_LED_MAX) 9039 return -EINVAL; 9040 9041 t = &led_tables[whichled]; 9042 if (t->state < 0 || t->state == on) 9043 return t->state; 9044 return mute_led_on_off(t, on); 9045 } 9046 EXPORT_SYMBOL_GPL(tpacpi_led_set); 9047 9048 static int mute_led_init(struct ibm_init_struct *iibm) 9049 { 9050 acpi_handle temp; 9051 int i; 9052 9053 for (i = 0; i < TPACPI_LED_MAX; i++) { 9054 struct tp_led_table *t = &led_tables[i]; 9055 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) 9056 mute_led_on_off(t, false); 9057 else 9058 t->state = -ENODEV; 9059 } 9060 return 0; 9061 } 9062 9063 static void mute_led_exit(void) 9064 { 9065 int i; 9066 9067 for (i = 0; i < TPACPI_LED_MAX; i++) 9068 tpacpi_led_set(i, false); 9069 } 9070 9071 static void mute_led_resume(void) 9072 { 9073 int i; 9074 9075 for (i = 0; i < TPACPI_LED_MAX; i++) { 9076 struct tp_led_table *t = &led_tables[i]; 9077 if (t->state >= 0) 9078 mute_led_on_off(t, t->state); 9079 } 9080 } 9081 9082 static struct ibm_struct mute_led_driver_data = { 9083 .name = "mute_led", 9084 .exit = mute_led_exit, 9085 .resume = mute_led_resume, 9086 }; 9087 9088 /**************************************************************************** 9089 **************************************************************************** 9090 * 9091 * Infrastructure 9092 * 9093 **************************************************************************** 9094 ****************************************************************************/ 9095 9096 /* 9097 * HKEY event callout for other subdrivers go here 9098 * (yes, it is ugly, but it is quick, safe, and gets the job done 9099 */ 9100 static void tpacpi_driver_event(const unsigned int hkey_event) 9101 { 9102 if (ibm_backlight_device) { 9103 switch (hkey_event) { 9104 case TP_HKEY_EV_BRGHT_UP: 9105 case TP_HKEY_EV_BRGHT_DOWN: 9106 tpacpi_brightness_notify_change(); 9107 } 9108 } 9109 if (alsa_card) { 9110 switch (hkey_event) { 9111 case TP_HKEY_EV_VOL_UP: 9112 case TP_HKEY_EV_VOL_DOWN: 9113 case TP_HKEY_EV_VOL_MUTE: 9114 volume_alsa_notify_change(); 9115 } 9116 } 9117 } 9118 9119 static void hotkey_driver_event(const unsigned int scancode) 9120 { 9121 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9122 } 9123 9124 /* sysfs name ---------------------------------------------------------- */ 9125 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 9126 struct device_attribute *attr, 9127 char *buf) 9128 { 9129 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 9130 } 9131 9132 static DEVICE_ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 9133 9134 /* --------------------------------------------------------------------- */ 9135 9136 /* /proc support */ 9137 static struct proc_dir_entry *proc_dir; 9138 9139 /* 9140 * Module and infrastructure proble, init and exit handling 9141 */ 9142 9143 static bool force_load; 9144 9145 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9146 static const char * __init str_supported(int is_supported) 9147 { 9148 static char text_unsupported[] __initdata = "not supported"; 9149 9150 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9151 } 9152 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9153 9154 static void ibm_exit(struct ibm_struct *ibm) 9155 { 9156 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9157 9158 list_del_init(&ibm->all_drivers); 9159 9160 if (ibm->flags.acpi_notify_installed) { 9161 dbg_printk(TPACPI_DBG_EXIT, 9162 "%s: acpi_remove_notify_handler\n", ibm->name); 9163 BUG_ON(!ibm->acpi); 9164 acpi_remove_notify_handler(*ibm->acpi->handle, 9165 ibm->acpi->type, 9166 dispatch_acpi_notify); 9167 ibm->flags.acpi_notify_installed = 0; 9168 } 9169 9170 if (ibm->flags.proc_created) { 9171 dbg_printk(TPACPI_DBG_EXIT, 9172 "%s: remove_proc_entry\n", ibm->name); 9173 remove_proc_entry(ibm->name, proc_dir); 9174 ibm->flags.proc_created = 0; 9175 } 9176 9177 if (ibm->flags.acpi_driver_registered) { 9178 dbg_printk(TPACPI_DBG_EXIT, 9179 "%s: acpi_bus_unregister_driver\n", ibm->name); 9180 BUG_ON(!ibm->acpi); 9181 acpi_bus_unregister_driver(ibm->acpi->driver); 9182 kfree(ibm->acpi->driver); 9183 ibm->acpi->driver = NULL; 9184 ibm->flags.acpi_driver_registered = 0; 9185 } 9186 9187 if (ibm->flags.init_called && ibm->exit) { 9188 ibm->exit(); 9189 ibm->flags.init_called = 0; 9190 } 9191 9192 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9193 } 9194 9195 static int __init ibm_init(struct ibm_init_struct *iibm) 9196 { 9197 int ret; 9198 struct ibm_struct *ibm = iibm->data; 9199 struct proc_dir_entry *entry; 9200 9201 BUG_ON(ibm == NULL); 9202 9203 INIT_LIST_HEAD(&ibm->all_drivers); 9204 9205 if (ibm->flags.experimental && !experimental) 9206 return 0; 9207 9208 dbg_printk(TPACPI_DBG_INIT, 9209 "probing for %s\n", ibm->name); 9210 9211 if (iibm->init) { 9212 ret = iibm->init(iibm); 9213 if (ret > 0) 9214 return 0; /* probe failed */ 9215 if (ret) 9216 return ret; 9217 9218 ibm->flags.init_called = 1; 9219 } 9220 9221 if (ibm->acpi) { 9222 if (ibm->acpi->hid) { 9223 ret = register_tpacpi_subdriver(ibm); 9224 if (ret) 9225 goto err_out; 9226 } 9227 9228 if (ibm->acpi->notify) { 9229 ret = setup_acpi_notify(ibm); 9230 if (ret == -ENODEV) { 9231 pr_notice("disabling subdriver %s\n", 9232 ibm->name); 9233 ret = 0; 9234 goto err_out; 9235 } 9236 if (ret < 0) 9237 goto err_out; 9238 } 9239 } 9240 9241 dbg_printk(TPACPI_DBG_INIT, 9242 "%s installed\n", ibm->name); 9243 9244 if (ibm->read) { 9245 umode_t mode = iibm->base_procfs_mode; 9246 9247 if (!mode) 9248 mode = S_IRUGO; 9249 if (ibm->write) 9250 mode |= S_IWUSR; 9251 entry = proc_create_data(ibm->name, mode, proc_dir, 9252 &dispatch_proc_fops, ibm); 9253 if (!entry) { 9254 pr_err("unable to create proc entry %s\n", ibm->name); 9255 ret = -ENODEV; 9256 goto err_out; 9257 } 9258 ibm->flags.proc_created = 1; 9259 } 9260 9261 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9262 9263 return 0; 9264 9265 err_out: 9266 dbg_printk(TPACPI_DBG_INIT, 9267 "%s: at error exit path with result %d\n", 9268 ibm->name, ret); 9269 9270 ibm_exit(ibm); 9271 return (ret < 0) ? ret : 0; 9272 } 9273 9274 /* Probing */ 9275 9276 static bool __pure __init tpacpi_is_fw_digit(const char c) 9277 { 9278 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 9279 } 9280 9281 static bool __pure __init tpacpi_is_valid_fw_id(const char * const s, 9282 const char t) 9283 { 9284 /* 9285 * Most models: xxyTkkWW (#.##c) 9286 * Ancient 570/600 and -SL lacks (#.##c) 9287 */ 9288 if (s && strlen(s) >= 8 && 9289 tpacpi_is_fw_digit(s[0]) && 9290 tpacpi_is_fw_digit(s[1]) && 9291 s[2] == t && 9292 (s[3] == 'T' || s[3] == 'N') && 9293 tpacpi_is_fw_digit(s[4]) && 9294 tpacpi_is_fw_digit(s[5])) 9295 return true; 9296 9297 /* New models: xxxyTkkW (#.##c); T550 and some others */ 9298 return s && strlen(s) >= 8 && 9299 tpacpi_is_fw_digit(s[0]) && 9300 tpacpi_is_fw_digit(s[1]) && 9301 tpacpi_is_fw_digit(s[2]) && 9302 s[3] == t && 9303 (s[4] == 'T' || s[4] == 'N') && 9304 tpacpi_is_fw_digit(s[5]) && 9305 tpacpi_is_fw_digit(s[6]); 9306 } 9307 9308 /* returns 0 - probe ok, or < 0 - probe error. 9309 * Probe ok doesn't mean thinkpad found. 9310 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 9311 static int __must_check __init get_thinkpad_model_data( 9312 struct thinkpad_id_data *tp) 9313 { 9314 const struct dmi_device *dev = NULL; 9315 char ec_fw_string[18]; 9316 char const *s; 9317 9318 if (!tp) 9319 return -EINVAL; 9320 9321 memset(tp, 0, sizeof(*tp)); 9322 9323 if (dmi_name_in_vendors("IBM")) 9324 tp->vendor = PCI_VENDOR_ID_IBM; 9325 else if (dmi_name_in_vendors("LENOVO")) 9326 tp->vendor = PCI_VENDOR_ID_LENOVO; 9327 else 9328 return 0; 9329 9330 s = dmi_get_system_info(DMI_BIOS_VERSION); 9331 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 9332 if (s && !tp->bios_version_str) 9333 return -ENOMEM; 9334 9335 /* Really ancient ThinkPad 240X will fail this, which is fine */ 9336 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') || 9337 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C'))) 9338 return 0; 9339 9340 tp->bios_model = tp->bios_version_str[0] 9341 | (tp->bios_version_str[1] << 8); 9342 tp->bios_release = (tp->bios_version_str[4] << 8) 9343 | tp->bios_version_str[5]; 9344 9345 /* 9346 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 9347 * X32 or newer, all Z series; Some models must have an 9348 * up-to-date BIOS or they will not be detected. 9349 * 9350 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9351 */ 9352 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 9353 if (sscanf(dev->name, 9354 "IBM ThinkPad Embedded Controller -[%17c", 9355 ec_fw_string) == 1) { 9356 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 9357 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 9358 9359 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 9360 if (!tp->ec_version_str) 9361 return -ENOMEM; 9362 9363 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 9364 tp->ec_model = ec_fw_string[0] 9365 | (ec_fw_string[1] << 8); 9366 tp->ec_release = (ec_fw_string[4] << 8) 9367 | ec_fw_string[5]; 9368 } else { 9369 pr_notice("ThinkPad firmware release %s " 9370 "doesn't match the known patterns\n", 9371 ec_fw_string); 9372 pr_notice("please report this to %s\n", 9373 TPACPI_MAIL); 9374 } 9375 break; 9376 } 9377 } 9378 9379 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 9380 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 9381 tp->model_str = kstrdup(s, GFP_KERNEL); 9382 if (!tp->model_str) 9383 return -ENOMEM; 9384 } else { 9385 s = dmi_get_system_info(DMI_BIOS_VENDOR); 9386 if (s && !(strncasecmp(s, "Lenovo", 6))) { 9387 tp->model_str = kstrdup(s, GFP_KERNEL); 9388 if (!tp->model_str) 9389 return -ENOMEM; 9390 } 9391 } 9392 9393 s = dmi_get_system_info(DMI_PRODUCT_NAME); 9394 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 9395 if (s && !tp->nummodel_str) 9396 return -ENOMEM; 9397 9398 return 0; 9399 } 9400 9401 static int __init probe_for_thinkpad(void) 9402 { 9403 int is_thinkpad; 9404 9405 if (acpi_disabled) 9406 return -ENODEV; 9407 9408 /* It would be dangerous to run the driver in this case */ 9409 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 9410 return -ENODEV; 9411 9412 /* 9413 * Non-ancient models have better DMI tagging, but very old models 9414 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 9415 */ 9416 is_thinkpad = (thinkpad_id.model_str != NULL) || 9417 (thinkpad_id.ec_model != 0) || 9418 tpacpi_is_fw_known(); 9419 9420 /* The EC handler is required */ 9421 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 9422 if (!ec_handle) { 9423 if (is_thinkpad) 9424 pr_err("Not yet supported ThinkPad detected!\n"); 9425 return -ENODEV; 9426 } 9427 9428 if (!is_thinkpad && !force_load) 9429 return -ENODEV; 9430 9431 return 0; 9432 } 9433 9434 static void __init thinkpad_acpi_init_banner(void) 9435 { 9436 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 9437 pr_info("%s\n", TPACPI_URL); 9438 9439 pr_info("ThinkPad BIOS %s, EC %s\n", 9440 (thinkpad_id.bios_version_str) ? 9441 thinkpad_id.bios_version_str : "unknown", 9442 (thinkpad_id.ec_version_str) ? 9443 thinkpad_id.ec_version_str : "unknown"); 9444 9445 BUG_ON(!thinkpad_id.vendor); 9446 9447 if (thinkpad_id.model_str) 9448 pr_info("%s %s, model %s\n", 9449 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 9450 "IBM" : ((thinkpad_id.vendor == 9451 PCI_VENDOR_ID_LENOVO) ? 9452 "Lenovo" : "Unknown vendor"), 9453 thinkpad_id.model_str, 9454 (thinkpad_id.nummodel_str) ? 9455 thinkpad_id.nummodel_str : "unknown"); 9456 } 9457 9458 /* Module init, exit, parameters */ 9459 9460 static struct ibm_init_struct ibms_init[] __initdata = { 9461 { 9462 .data = &thinkpad_acpi_driver_data, 9463 }, 9464 { 9465 .init = hotkey_init, 9466 .data = &hotkey_driver_data, 9467 }, 9468 { 9469 .init = bluetooth_init, 9470 .data = &bluetooth_driver_data, 9471 }, 9472 { 9473 .init = wan_init, 9474 .data = &wan_driver_data, 9475 }, 9476 { 9477 .init = uwb_init, 9478 .data = &uwb_driver_data, 9479 }, 9480 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 9481 { 9482 .init = video_init, 9483 .base_procfs_mode = S_IRUSR, 9484 .data = &video_driver_data, 9485 }, 9486 #endif 9487 { 9488 .init = kbdlight_init, 9489 .data = &kbdlight_driver_data, 9490 }, 9491 { 9492 .init = light_init, 9493 .data = &light_driver_data, 9494 }, 9495 { 9496 .init = cmos_init, 9497 .data = &cmos_driver_data, 9498 }, 9499 { 9500 .init = led_init, 9501 .data = &led_driver_data, 9502 }, 9503 { 9504 .init = beep_init, 9505 .data = &beep_driver_data, 9506 }, 9507 { 9508 .init = thermal_init, 9509 .data = &thermal_driver_data, 9510 }, 9511 { 9512 .init = brightness_init, 9513 .data = &brightness_driver_data, 9514 }, 9515 { 9516 .init = volume_init, 9517 .data = &volume_driver_data, 9518 }, 9519 { 9520 .init = fan_init, 9521 .data = &fan_driver_data, 9522 }, 9523 { 9524 .init = mute_led_init, 9525 .data = &mute_led_driver_data, 9526 }, 9527 }; 9528 9529 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 9530 { 9531 unsigned int i; 9532 struct ibm_struct *ibm; 9533 9534 if (!kp || !kp->name || !val) 9535 return -EINVAL; 9536 9537 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9538 ibm = ibms_init[i].data; 9539 WARN_ON(ibm == NULL); 9540 9541 if (!ibm || !ibm->name) 9542 continue; 9543 9544 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 9545 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 9546 return -ENOSPC; 9547 strcpy(ibms_init[i].param, val); 9548 strcat(ibms_init[i].param, ","); 9549 return 0; 9550 } 9551 } 9552 9553 return -EINVAL; 9554 } 9555 9556 module_param(experimental, int, 0444); 9557 MODULE_PARM_DESC(experimental, 9558 "Enables experimental features when non-zero"); 9559 9560 module_param_named(debug, dbg_level, uint, 0); 9561 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 9562 9563 module_param(force_load, bool, 0444); 9564 MODULE_PARM_DESC(force_load, 9565 "Attempts to load the driver even on a " 9566 "mis-identified ThinkPad when true"); 9567 9568 module_param_named(fan_control, fan_control_allowed, bool, 0444); 9569 MODULE_PARM_DESC(fan_control, 9570 "Enables setting fan parameters features when true"); 9571 9572 module_param_named(brightness_mode, brightness_mode, uint, 0444); 9573 MODULE_PARM_DESC(brightness_mode, 9574 "Selects brightness control strategy: " 9575 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 9576 9577 module_param(brightness_enable, uint, 0444); 9578 MODULE_PARM_DESC(brightness_enable, 9579 "Enables backlight control when 1, disables when 0"); 9580 9581 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 9582 module_param_named(volume_mode, volume_mode, uint, 0444); 9583 MODULE_PARM_DESC(volume_mode, 9584 "Selects volume control strategy: " 9585 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 9586 9587 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 9588 MODULE_PARM_DESC(volume_capabilities, 9589 "Selects the mixer capabilites: " 9590 "0=auto, 1=volume and mute, 2=mute only"); 9591 9592 module_param_named(volume_control, volume_control_allowed, bool, 0444); 9593 MODULE_PARM_DESC(volume_control, 9594 "Enables software override for the console audio " 9595 "control when true"); 9596 9597 module_param_named(software_mute, software_mute_requested, bool, 0444); 9598 MODULE_PARM_DESC(software_mute, 9599 "Request full software mute control"); 9600 9601 /* ALSA module API parameters */ 9602 module_param_named(index, alsa_index, int, 0444); 9603 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 9604 module_param_named(id, alsa_id, charp, 0444); 9605 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 9606 module_param_named(enable, alsa_enable, bool, 0444); 9607 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 9608 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 9609 9610 #define TPACPI_PARAM(feature) \ 9611 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 9612 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 9613 "at module load, see documentation") 9614 9615 TPACPI_PARAM(hotkey); 9616 TPACPI_PARAM(bluetooth); 9617 TPACPI_PARAM(video); 9618 TPACPI_PARAM(light); 9619 TPACPI_PARAM(cmos); 9620 TPACPI_PARAM(led); 9621 TPACPI_PARAM(beep); 9622 TPACPI_PARAM(brightness); 9623 TPACPI_PARAM(volume); 9624 TPACPI_PARAM(fan); 9625 9626 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 9627 module_param(dbg_wlswemul, uint, 0444); 9628 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 9629 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 9630 MODULE_PARM_DESC(wlsw_state, 9631 "Initial state of the emulated WLSW switch"); 9632 9633 module_param(dbg_bluetoothemul, uint, 0444); 9634 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 9635 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 9636 MODULE_PARM_DESC(bluetooth_state, 9637 "Initial state of the emulated bluetooth switch"); 9638 9639 module_param(dbg_wwanemul, uint, 0444); 9640 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 9641 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 9642 MODULE_PARM_DESC(wwan_state, 9643 "Initial state of the emulated WWAN switch"); 9644 9645 module_param(dbg_uwbemul, uint, 0444); 9646 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 9647 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 9648 MODULE_PARM_DESC(uwb_state, 9649 "Initial state of the emulated UWB switch"); 9650 #endif 9651 9652 static void thinkpad_acpi_module_exit(void) 9653 { 9654 struct ibm_struct *ibm, *itmp; 9655 9656 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 9657 9658 list_for_each_entry_safe_reverse(ibm, itmp, 9659 &tpacpi_all_drivers, 9660 all_drivers) { 9661 ibm_exit(ibm); 9662 } 9663 9664 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 9665 9666 if (tpacpi_inputdev) { 9667 if (tp_features.input_device_registered) 9668 input_unregister_device(tpacpi_inputdev); 9669 else 9670 input_free_device(tpacpi_inputdev); 9671 kfree(hotkey_keycode_map); 9672 } 9673 9674 if (tpacpi_hwmon) 9675 hwmon_device_unregister(tpacpi_hwmon); 9676 9677 if (tp_features.sensors_pdev_attrs_registered) 9678 device_remove_file(&tpacpi_sensors_pdev->dev, &dev_attr_name); 9679 if (tpacpi_sensors_pdev) 9680 platform_device_unregister(tpacpi_sensors_pdev); 9681 if (tpacpi_pdev) 9682 platform_device_unregister(tpacpi_pdev); 9683 9684 if (tp_features.sensors_pdrv_attrs_registered) 9685 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 9686 if (tp_features.platform_drv_attrs_registered) 9687 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 9688 9689 if (tp_features.sensors_pdrv_registered) 9690 platform_driver_unregister(&tpacpi_hwmon_pdriver); 9691 9692 if (tp_features.platform_drv_registered) 9693 platform_driver_unregister(&tpacpi_pdriver); 9694 9695 if (proc_dir) 9696 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 9697 9698 if (tpacpi_wq) 9699 destroy_workqueue(tpacpi_wq); 9700 9701 kfree(thinkpad_id.bios_version_str); 9702 kfree(thinkpad_id.ec_version_str); 9703 kfree(thinkpad_id.model_str); 9704 kfree(thinkpad_id.nummodel_str); 9705 } 9706 9707 9708 static int __init thinkpad_acpi_module_init(void) 9709 { 9710 int ret, i; 9711 9712 tpacpi_lifecycle = TPACPI_LIFE_INIT; 9713 9714 /* Driver-level probe */ 9715 9716 ret = get_thinkpad_model_data(&thinkpad_id); 9717 if (ret) { 9718 pr_err("unable to get DMI data: %d\n", ret); 9719 thinkpad_acpi_module_exit(); 9720 return ret; 9721 } 9722 ret = probe_for_thinkpad(); 9723 if (ret) { 9724 thinkpad_acpi_module_exit(); 9725 return ret; 9726 } 9727 9728 /* Driver initialization */ 9729 9730 thinkpad_acpi_init_banner(); 9731 tpacpi_check_outdated_fw(); 9732 9733 TPACPI_ACPIHANDLE_INIT(ecrd); 9734 TPACPI_ACPIHANDLE_INIT(ecwr); 9735 9736 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 9737 if (!tpacpi_wq) { 9738 thinkpad_acpi_module_exit(); 9739 return -ENOMEM; 9740 } 9741 9742 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 9743 if (!proc_dir) { 9744 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 9745 thinkpad_acpi_module_exit(); 9746 return -ENODEV; 9747 } 9748 9749 ret = platform_driver_register(&tpacpi_pdriver); 9750 if (ret) { 9751 pr_err("unable to register main platform driver\n"); 9752 thinkpad_acpi_module_exit(); 9753 return ret; 9754 } 9755 tp_features.platform_drv_registered = 1; 9756 9757 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 9758 if (ret) { 9759 pr_err("unable to register hwmon platform driver\n"); 9760 thinkpad_acpi_module_exit(); 9761 return ret; 9762 } 9763 tp_features.sensors_pdrv_registered = 1; 9764 9765 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 9766 if (!ret) { 9767 tp_features.platform_drv_attrs_registered = 1; 9768 ret = tpacpi_create_driver_attributes( 9769 &tpacpi_hwmon_pdriver.driver); 9770 } 9771 if (ret) { 9772 pr_err("unable to create sysfs driver attributes\n"); 9773 thinkpad_acpi_module_exit(); 9774 return ret; 9775 } 9776 tp_features.sensors_pdrv_attrs_registered = 1; 9777 9778 9779 /* Device initialization */ 9780 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9781 NULL, 0); 9782 if (IS_ERR(tpacpi_pdev)) { 9783 ret = PTR_ERR(tpacpi_pdev); 9784 tpacpi_pdev = NULL; 9785 pr_err("unable to register platform device\n"); 9786 thinkpad_acpi_module_exit(); 9787 return ret; 9788 } 9789 tpacpi_sensors_pdev = platform_device_register_simple( 9790 TPACPI_HWMON_DRVR_NAME, 9791 -1, NULL, 0); 9792 if (IS_ERR(tpacpi_sensors_pdev)) { 9793 ret = PTR_ERR(tpacpi_sensors_pdev); 9794 tpacpi_sensors_pdev = NULL; 9795 pr_err("unable to register hwmon platform device\n"); 9796 thinkpad_acpi_module_exit(); 9797 return ret; 9798 } 9799 ret = device_create_file(&tpacpi_sensors_pdev->dev, &dev_attr_name); 9800 if (ret) { 9801 pr_err("unable to create sysfs hwmon device attributes\n"); 9802 thinkpad_acpi_module_exit(); 9803 return ret; 9804 } 9805 tp_features.sensors_pdev_attrs_registered = 1; 9806 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9807 if (IS_ERR(tpacpi_hwmon)) { 9808 ret = PTR_ERR(tpacpi_hwmon); 9809 tpacpi_hwmon = NULL; 9810 pr_err("unable to register hwmon device\n"); 9811 thinkpad_acpi_module_exit(); 9812 return ret; 9813 } 9814 mutex_init(&tpacpi_inputdev_send_mutex); 9815 tpacpi_inputdev = input_allocate_device(); 9816 if (!tpacpi_inputdev) { 9817 thinkpad_acpi_module_exit(); 9818 return -ENOMEM; 9819 } else { 9820 /* Prepare input device, but don't register */ 9821 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9822 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9823 tpacpi_inputdev->id.bustype = BUS_HOST; 9824 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9825 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9826 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9827 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9828 } 9829 9830 /* Init subdriver dependencies */ 9831 tpacpi_detect_brightness_capabilities(); 9832 9833 /* Init subdrivers */ 9834 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9835 ret = ibm_init(&ibms_init[i]); 9836 if (ret >= 0 && *ibms_init[i].param) 9837 ret = ibms_init[i].data->write(ibms_init[i].param); 9838 if (ret < 0) { 9839 thinkpad_acpi_module_exit(); 9840 return ret; 9841 } 9842 } 9843 9844 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9845 9846 ret = input_register_device(tpacpi_inputdev); 9847 if (ret < 0) { 9848 pr_err("unable to register input device\n"); 9849 thinkpad_acpi_module_exit(); 9850 return ret; 9851 } else { 9852 tp_features.input_device_registered = 1; 9853 } 9854 9855 return 0; 9856 } 9857 9858 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9859 9860 /* 9861 * This will autoload the driver in almost every ThinkPad 9862 * in widespread use. 9863 * 9864 * Only _VERY_ old models, like the 240, 240x and 570 lack 9865 * the HKEY event interface. 9866 */ 9867 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9868 9869 /* 9870 * DMI matching for module autoloading 9871 * 9872 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9873 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9874 * 9875 * Only models listed in thinkwiki will be supported, so add yours 9876 * if it is not there yet. 9877 */ 9878 #define IBM_BIOS_MODULE_ALIAS(__type) \ 9879 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9880 9881 /* Ancient thinkpad BIOSes have to be identified by 9882 * BIOS type or model number, and there are far less 9883 * BIOS types than model numbers... */ 9884 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9885 9886 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9887 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9888 MODULE_DESCRIPTION(TPACPI_DESC); 9889 MODULE_VERSION(TPACPI_VERSION); 9890 MODULE_LICENSE("GPL"); 9891 9892 module_init(thinkpad_acpi_module_init); 9893 module_exit(thinkpad_acpi_module_exit); 9894