1 /* 2 * thinkpad_acpi.c - ThinkPad ACPI Extras 3 * 4 * 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net> 6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #define TPACPI_VERSION "0.25" 27 #define TPACPI_SYSFS_VERSION 0x020700 28 29 /* 30 * Changelog: 31 * 2007-10-20 changelog trimmed down 32 * 33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 34 * drivers/misc. 35 * 36 * 2006-11-22 0.13 new maintainer 37 * changelog now lives in git commit history, and will 38 * not be updated further in-file. 39 * 40 * 2005-03-17 0.11 support for 600e, 770x 41 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 42 * 43 * 2005-01-16 0.9 use MODULE_VERSION 44 * thanks to Henrik Brix Andersen <brix@gentoo.org> 45 * fix parameter passing on module loading 46 * thanks to Rusty Russell <rusty@rustcorp.com.au> 47 * thanks to Jim Radford <radford@blackbean.org> 48 * 2004-11-08 0.8 fix init error case, don't return from a macro 49 * thanks to Chris Wright <chrisw@osdl.org> 50 */ 51 52 #include <linux/kernel.h> 53 #include <linux/module.h> 54 #include <linux/init.h> 55 #include <linux/types.h> 56 #include <linux/string.h> 57 #include <linux/list.h> 58 #include <linux/mutex.h> 59 #include <linux/sched.h> 60 #include <linux/kthread.h> 61 #include <linux/freezer.h> 62 #include <linux/delay.h> 63 #include <linux/slab.h> 64 #include <linux/nvram.h> 65 #include <linux/proc_fs.h> 66 #include <linux/seq_file.h> 67 #include <linux/sysfs.h> 68 #include <linux/backlight.h> 69 #include <linux/fb.h> 70 #include <linux/platform_device.h> 71 #include <linux/hwmon.h> 72 #include <linux/hwmon-sysfs.h> 73 #include <linux/input.h> 74 #include <linux/leds.h> 75 #include <linux/rfkill.h> 76 #include <linux/dmi.h> 77 #include <linux/jiffies.h> 78 #include <linux/workqueue.h> 79 #include <linux/acpi.h> 80 #include <linux/pci_ids.h> 81 #include <linux/thinkpad_acpi.h> 82 #include <sound/core.h> 83 #include <sound/control.h> 84 #include <sound/initval.h> 85 #include <asm/uaccess.h> 86 #include <acpi/video.h> 87 88 /* ThinkPad CMOS commands */ 89 #define TP_CMOS_VOLUME_DOWN 0 90 #define TP_CMOS_VOLUME_UP 1 91 #define TP_CMOS_VOLUME_MUTE 2 92 #define TP_CMOS_BRIGHTNESS_UP 4 93 #define TP_CMOS_BRIGHTNESS_DOWN 5 94 #define TP_CMOS_THINKLIGHT_ON 12 95 #define TP_CMOS_THINKLIGHT_OFF 13 96 97 /* NVRAM Addresses */ 98 enum tp_nvram_addr { 99 TP_NVRAM_ADDR_HK2 = 0x57, 100 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 101 TP_NVRAM_ADDR_VIDEO = 0x59, 102 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 103 TP_NVRAM_ADDR_MIXER = 0x60, 104 }; 105 106 /* NVRAM bit masks */ 107 enum { 108 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 109 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 110 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 111 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 112 TP_NVRAM_MASK_THINKLIGHT = 0x10, 113 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 114 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 115 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 116 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 117 TP_NVRAM_MASK_MUTE = 0x40, 118 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 119 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 120 TP_NVRAM_POS_LEVEL_VOLUME = 0, 121 }; 122 123 /* Misc NVRAM-related */ 124 enum { 125 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 126 }; 127 128 /* ACPI HIDs */ 129 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 130 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 131 #define TPACPI_ACPI_EC_HID "PNP0C09" 132 133 /* Input IDs */ 134 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 135 #define TPACPI_HKEY_INPUT_VERSION 0x4101 136 137 /* ACPI \WGSV commands */ 138 enum { 139 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 140 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 141 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 142 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 143 }; 144 145 /* TP_ACPI_WGSV_GET_STATE bits */ 146 enum { 147 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 148 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 149 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 150 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 151 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 152 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 153 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 154 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 155 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 156 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 157 }; 158 159 /* HKEY events */ 160 enum tpacpi_hkey_event_t { 161 /* Hotkey-related */ 162 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 163 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 164 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 165 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 166 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 167 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 168 169 /* Reasons for waking up from S3/S4 */ 170 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 171 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 172 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 173 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 174 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 175 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 176 177 /* Auto-sleep after eject request */ 178 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 179 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 180 181 /* Misc bay events */ 182 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 183 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 184 or port replicator */ 185 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 186 dock or port replicator */ 187 188 /* User-interface events */ 189 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 190 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 191 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 192 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 193 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 194 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 195 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 196 197 /* Key-related user-interface events */ 198 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 199 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 200 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */ 201 202 /* Thermal events */ 203 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 204 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 205 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 206 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 207 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 208 209 /* AC-related events */ 210 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 211 212 /* Misc */ 213 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 214 }; 215 216 /**************************************************************************** 217 * Main driver 218 */ 219 220 #define TPACPI_NAME "thinkpad" 221 #define TPACPI_DESC "ThinkPad ACPI Extras" 222 #define TPACPI_FILE TPACPI_NAME "_acpi" 223 #define TPACPI_URL "http://ibm-acpi.sf.net/" 224 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 225 226 #define TPACPI_PROC_DIR "ibm" 227 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 228 #define TPACPI_DRVR_NAME TPACPI_FILE 229 #define TPACPI_DRVR_SHORTNAME "tpacpi" 230 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 231 232 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 233 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 234 235 #define TPACPI_MAX_ACPI_ARGS 3 236 237 /* Debugging printk groups */ 238 #define TPACPI_DBG_ALL 0xffff 239 #define TPACPI_DBG_DISCLOSETASK 0x8000 240 #define TPACPI_DBG_INIT 0x0001 241 #define TPACPI_DBG_EXIT 0x0002 242 #define TPACPI_DBG_RFKILL 0x0004 243 #define TPACPI_DBG_HKEY 0x0008 244 #define TPACPI_DBG_FAN 0x0010 245 #define TPACPI_DBG_BRGHT 0x0020 246 #define TPACPI_DBG_MIXER 0x0040 247 248 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 249 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 250 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 251 252 253 /**************************************************************************** 254 * Driver-wide structs and misc. variables 255 */ 256 257 struct ibm_struct; 258 259 struct tp_acpi_drv_struct { 260 const struct acpi_device_id *hid; 261 struct acpi_driver *driver; 262 263 void (*notify) (struct ibm_struct *, u32); 264 acpi_handle *handle; 265 u32 type; 266 struct acpi_device *device; 267 }; 268 269 struct ibm_struct { 270 char *name; 271 272 int (*read) (struct seq_file *); 273 int (*write) (char *); 274 void (*exit) (void); 275 void (*resume) (void); 276 void (*suspend) (void); 277 void (*shutdown) (void); 278 279 struct list_head all_drivers; 280 281 struct tp_acpi_drv_struct *acpi; 282 283 struct { 284 u8 acpi_driver_registered:1; 285 u8 acpi_notify_installed:1; 286 u8 proc_created:1; 287 u8 init_called:1; 288 u8 experimental:1; 289 } flags; 290 }; 291 292 struct ibm_init_struct { 293 char param[32]; 294 295 int (*init) (struct ibm_init_struct *); 296 umode_t base_procfs_mode; 297 struct ibm_struct *data; 298 }; 299 300 static struct { 301 u32 bluetooth:1; 302 u32 hotkey:1; 303 u32 hotkey_mask:1; 304 u32 hotkey_wlsw:1; 305 u32 hotkey_tablet:1; 306 u32 kbdlight:1; 307 u32 light:1; 308 u32 light_status:1; 309 u32 bright_acpimode:1; 310 u32 bright_unkfw:1; 311 u32 wan:1; 312 u32 uwb:1; 313 u32 fan_ctrl_status_undef:1; 314 u32 second_fan:1; 315 u32 beep_needs_two_args:1; 316 u32 mixer_no_level_control:1; 317 u32 input_device_registered:1; 318 u32 platform_drv_registered:1; 319 u32 platform_drv_attrs_registered:1; 320 u32 sensors_pdrv_registered:1; 321 u32 sensors_pdrv_attrs_registered:1; 322 u32 sensors_pdev_attrs_registered:1; 323 u32 hotkey_poll_active:1; 324 u32 has_adaptive_kbd:1; 325 } tp_features; 326 327 static struct { 328 u16 hotkey_mask_ff:1; 329 u16 volume_ctrl_forbidden:1; 330 } tp_warned; 331 332 struct thinkpad_id_data { 333 unsigned int vendor; /* ThinkPad vendor: 334 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 335 336 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 337 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 338 339 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 340 u16 ec_model; 341 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 342 u16 ec_release; 343 344 char *model_str; /* ThinkPad T43 */ 345 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 346 }; 347 static struct thinkpad_id_data thinkpad_id; 348 349 static enum { 350 TPACPI_LIFE_INIT = 0, 351 TPACPI_LIFE_RUNNING, 352 TPACPI_LIFE_EXITING, 353 } tpacpi_lifecycle; 354 355 static int experimental; 356 static u32 dbg_level; 357 358 static struct workqueue_struct *tpacpi_wq; 359 360 enum led_status_t { 361 TPACPI_LED_OFF = 0, 362 TPACPI_LED_ON, 363 TPACPI_LED_BLINK, 364 }; 365 366 /* Special LED class that can defer work */ 367 struct tpacpi_led_classdev { 368 struct led_classdev led_classdev; 369 struct work_struct work; 370 enum led_status_t new_state; 371 int led; 372 }; 373 374 /* brightness level capabilities */ 375 static unsigned int bright_maxlvl; /* 0 = unknown */ 376 377 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 378 static int dbg_wlswemul; 379 static bool tpacpi_wlsw_emulstate; 380 static int dbg_bluetoothemul; 381 static bool tpacpi_bluetooth_emulstate; 382 static int dbg_wwanemul; 383 static bool tpacpi_wwan_emulstate; 384 static int dbg_uwbemul; 385 static bool tpacpi_uwb_emulstate; 386 #endif 387 388 389 /************************************************************************* 390 * Debugging helpers 391 */ 392 393 #define dbg_printk(a_dbg_level, format, arg...) \ 394 do { \ 395 if (dbg_level & (a_dbg_level)) \ 396 printk(KERN_DEBUG pr_fmt("%s: " format), \ 397 __func__, ##arg); \ 398 } while (0) 399 400 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 401 #define vdbg_printk dbg_printk 402 static const char *str_supported(int is_supported); 403 #else 404 static inline const char *str_supported(int is_supported) { return ""; } 405 #define vdbg_printk(a_dbg_level, format, arg...) \ 406 do { if (0) no_printk(format, ##arg); } while (0) 407 #endif 408 409 static void tpacpi_log_usertask(const char * const what) 410 { 411 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 412 what, task_tgid_vnr(current)); 413 } 414 415 #define tpacpi_disclose_usertask(what, format, arg...) \ 416 do { \ 417 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 418 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 419 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 420 what, task_tgid_vnr(current), ## arg); \ 421 } \ 422 } while (0) 423 424 /* 425 * Quirk handling helpers 426 * 427 * ThinkPad IDs and versions seen in the field so far 428 * are two-characters from the set [0-9A-Z], i.e. base 36. 429 * 430 * We use values well outside that range as specials. 431 */ 432 433 #define TPACPI_MATCH_ANY 0xffffU 434 #define TPACPI_MATCH_UNKNOWN 0U 435 436 /* TPID('1', 'Y') == 0x5931 */ 437 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 438 439 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 440 { .vendor = PCI_VENDOR_ID_IBM, \ 441 .bios = TPID(__id1, __id2), \ 442 .ec = TPACPI_MATCH_ANY, \ 443 .quirks = (__quirk) } 444 445 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 446 { .vendor = PCI_VENDOR_ID_LENOVO, \ 447 .bios = TPID(__id1, __id2), \ 448 .ec = TPACPI_MATCH_ANY, \ 449 .quirks = (__quirk) } 450 451 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 452 { .vendor = PCI_VENDOR_ID_LENOVO, \ 453 .bios = TPACPI_MATCH_ANY, \ 454 .ec = TPID(__id1, __id2), \ 455 .quirks = (__quirk) } 456 457 struct tpacpi_quirk { 458 unsigned int vendor; 459 u16 bios; 460 u16 ec; 461 unsigned long quirks; 462 }; 463 464 /** 465 * tpacpi_check_quirks() - search BIOS/EC version on a list 466 * @qlist: array of &struct tpacpi_quirk 467 * @qlist_size: number of elements in @qlist 468 * 469 * Iterates over a quirks list until one is found that matches the 470 * ThinkPad's vendor, BIOS and EC model. 471 * 472 * Returns 0 if nothing matches, otherwise returns the quirks field of 473 * the matching &struct tpacpi_quirk entry. 474 * 475 * The match criteria is: vendor, ec and bios much match. 476 */ 477 static unsigned long __init tpacpi_check_quirks( 478 const struct tpacpi_quirk *qlist, 479 unsigned int qlist_size) 480 { 481 while (qlist_size) { 482 if ((qlist->vendor == thinkpad_id.vendor || 483 qlist->vendor == TPACPI_MATCH_ANY) && 484 (qlist->bios == thinkpad_id.bios_model || 485 qlist->bios == TPACPI_MATCH_ANY) && 486 (qlist->ec == thinkpad_id.ec_model || 487 qlist->ec == TPACPI_MATCH_ANY)) 488 return qlist->quirks; 489 490 qlist_size--; 491 qlist++; 492 } 493 return 0; 494 } 495 496 static inline bool __pure __init tpacpi_is_lenovo(void) 497 { 498 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 499 } 500 501 static inline bool __pure __init tpacpi_is_ibm(void) 502 { 503 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 504 } 505 506 /**************************************************************************** 507 **************************************************************************** 508 * 509 * ACPI Helpers and device model 510 * 511 **************************************************************************** 512 ****************************************************************************/ 513 514 /************************************************************************* 515 * ACPI basic handles 516 */ 517 518 static acpi_handle root_handle; 519 static acpi_handle ec_handle; 520 521 #define TPACPI_HANDLE(object, parent, paths...) \ 522 static acpi_handle object##_handle; \ 523 static const acpi_handle * const object##_parent __initconst = \ 524 &parent##_handle; \ 525 static char *object##_paths[] __initdata = { paths } 526 527 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 528 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 529 530 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 531 /* T4x, X31, X40 */ 532 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 533 "\\CMS", /* R40, R40e */ 534 ); /* all others */ 535 536 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 537 "^HKEY", /* R30, R31 */ 538 "HKEY", /* all others */ 539 ); /* 570 */ 540 541 /************************************************************************* 542 * ACPI helpers 543 */ 544 545 static int acpi_evalf(acpi_handle handle, 546 int *res, char *method, char *fmt, ...) 547 { 548 char *fmt0 = fmt; 549 struct acpi_object_list params; 550 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 551 struct acpi_buffer result, *resultp; 552 union acpi_object out_obj; 553 acpi_status status; 554 va_list ap; 555 char res_type; 556 int success; 557 int quiet; 558 559 if (!*fmt) { 560 pr_err("acpi_evalf() called with empty format\n"); 561 return 0; 562 } 563 564 if (*fmt == 'q') { 565 quiet = 1; 566 fmt++; 567 } else 568 quiet = 0; 569 570 res_type = *(fmt++); 571 572 params.count = 0; 573 params.pointer = &in_objs[0]; 574 575 va_start(ap, fmt); 576 while (*fmt) { 577 char c = *(fmt++); 578 switch (c) { 579 case 'd': /* int */ 580 in_objs[params.count].integer.value = va_arg(ap, int); 581 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 582 break; 583 /* add more types as needed */ 584 default: 585 pr_err("acpi_evalf() called " 586 "with invalid format character '%c'\n", c); 587 va_end(ap); 588 return 0; 589 } 590 } 591 va_end(ap); 592 593 if (res_type != 'v') { 594 result.length = sizeof(out_obj); 595 result.pointer = &out_obj; 596 resultp = &result; 597 } else 598 resultp = NULL; 599 600 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 601 602 switch (res_type) { 603 case 'd': /* int */ 604 success = (status == AE_OK && 605 out_obj.type == ACPI_TYPE_INTEGER); 606 if (success && res) 607 *res = out_obj.integer.value; 608 break; 609 case 'v': /* void */ 610 success = status == AE_OK; 611 break; 612 /* add more types as needed */ 613 default: 614 pr_err("acpi_evalf() called " 615 "with invalid format character '%c'\n", res_type); 616 return 0; 617 } 618 619 if (!success && !quiet) 620 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 621 method, fmt0, acpi_format_exception(status)); 622 623 return success; 624 } 625 626 static int acpi_ec_read(int i, u8 *p) 627 { 628 int v; 629 630 if (ecrd_handle) { 631 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 632 return 0; 633 *p = v; 634 } else { 635 if (ec_read(i, p) < 0) 636 return 0; 637 } 638 639 return 1; 640 } 641 642 static int acpi_ec_write(int i, u8 v) 643 { 644 if (ecwr_handle) { 645 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 646 return 0; 647 } else { 648 if (ec_write(i, v) < 0) 649 return 0; 650 } 651 652 return 1; 653 } 654 655 static int issue_thinkpad_cmos_command(int cmos_cmd) 656 { 657 if (!cmos_handle) 658 return -ENXIO; 659 660 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 661 return -EIO; 662 663 return 0; 664 } 665 666 /************************************************************************* 667 * ACPI device model 668 */ 669 670 #define TPACPI_ACPIHANDLE_INIT(object) \ 671 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 672 object##_paths, ARRAY_SIZE(object##_paths)) 673 674 static void __init drv_acpi_handle_init(const char *name, 675 acpi_handle *handle, const acpi_handle parent, 676 char **paths, const int num_paths) 677 { 678 int i; 679 acpi_status status; 680 681 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 682 name); 683 684 for (i = 0; i < num_paths; i++) { 685 status = acpi_get_handle(parent, paths[i], handle); 686 if (ACPI_SUCCESS(status)) { 687 dbg_printk(TPACPI_DBG_INIT, 688 "Found ACPI handle %s for %s\n", 689 paths[i], name); 690 return; 691 } 692 } 693 694 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 695 name); 696 *handle = NULL; 697 } 698 699 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 700 u32 level, void *context, void **return_value) 701 { 702 struct acpi_device *dev; 703 if (!strcmp(context, "video")) { 704 if (acpi_bus_get_device(handle, &dev)) 705 return AE_OK; 706 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 707 return AE_OK; 708 } 709 710 *(acpi_handle *)return_value = handle; 711 712 return AE_CTRL_TERMINATE; 713 } 714 715 static void __init tpacpi_acpi_handle_locate(const char *name, 716 const char *hid, 717 acpi_handle *handle) 718 { 719 acpi_status status; 720 acpi_handle device_found; 721 722 BUG_ON(!name || !handle); 723 vdbg_printk(TPACPI_DBG_INIT, 724 "trying to locate ACPI handle for %s, using HID %s\n", 725 name, hid ? hid : "NULL"); 726 727 memset(&device_found, 0, sizeof(device_found)); 728 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 729 (void *)name, &device_found); 730 731 *handle = NULL; 732 733 if (ACPI_SUCCESS(status)) { 734 *handle = device_found; 735 dbg_printk(TPACPI_DBG_INIT, 736 "Found ACPI handle for %s\n", name); 737 } else { 738 vdbg_printk(TPACPI_DBG_INIT, 739 "Could not locate an ACPI handle for %s: %s\n", 740 name, acpi_format_exception(status)); 741 } 742 } 743 744 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 745 { 746 struct ibm_struct *ibm = data; 747 748 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 749 return; 750 751 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 752 return; 753 754 ibm->acpi->notify(ibm, event); 755 } 756 757 static int __init setup_acpi_notify(struct ibm_struct *ibm) 758 { 759 acpi_status status; 760 int rc; 761 762 BUG_ON(!ibm->acpi); 763 764 if (!*ibm->acpi->handle) 765 return 0; 766 767 vdbg_printk(TPACPI_DBG_INIT, 768 "setting up ACPI notify for %s\n", ibm->name); 769 770 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 771 if (rc < 0) { 772 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 773 return -ENODEV; 774 } 775 776 ibm->acpi->device->driver_data = ibm; 777 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 778 TPACPI_ACPI_EVENT_PREFIX, 779 ibm->name); 780 781 status = acpi_install_notify_handler(*ibm->acpi->handle, 782 ibm->acpi->type, dispatch_acpi_notify, ibm); 783 if (ACPI_FAILURE(status)) { 784 if (status == AE_ALREADY_EXISTS) { 785 pr_notice("another device driver is already " 786 "handling %s events\n", ibm->name); 787 } else { 788 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 789 ibm->name, acpi_format_exception(status)); 790 } 791 return -ENODEV; 792 } 793 ibm->flags.acpi_notify_installed = 1; 794 return 0; 795 } 796 797 static int __init tpacpi_device_add(struct acpi_device *device) 798 { 799 return 0; 800 } 801 802 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 803 { 804 int rc; 805 806 dbg_printk(TPACPI_DBG_INIT, 807 "registering %s as an ACPI driver\n", ibm->name); 808 809 BUG_ON(!ibm->acpi); 810 811 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 812 if (!ibm->acpi->driver) { 813 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 814 return -ENOMEM; 815 } 816 817 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 818 ibm->acpi->driver->ids = ibm->acpi->hid; 819 820 ibm->acpi->driver->ops.add = &tpacpi_device_add; 821 822 rc = acpi_bus_register_driver(ibm->acpi->driver); 823 if (rc < 0) { 824 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 825 ibm->name, rc); 826 kfree(ibm->acpi->driver); 827 ibm->acpi->driver = NULL; 828 } else if (!rc) 829 ibm->flags.acpi_driver_registered = 1; 830 831 return rc; 832 } 833 834 835 /**************************************************************************** 836 **************************************************************************** 837 * 838 * Procfs Helpers 839 * 840 **************************************************************************** 841 ****************************************************************************/ 842 843 static int dispatch_proc_show(struct seq_file *m, void *v) 844 { 845 struct ibm_struct *ibm = m->private; 846 847 if (!ibm || !ibm->read) 848 return -EINVAL; 849 return ibm->read(m); 850 } 851 852 static int dispatch_proc_open(struct inode *inode, struct file *file) 853 { 854 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 855 } 856 857 static ssize_t dispatch_proc_write(struct file *file, 858 const char __user *userbuf, 859 size_t count, loff_t *pos) 860 { 861 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 862 char *kernbuf; 863 int ret; 864 865 if (!ibm || !ibm->write) 866 return -EINVAL; 867 if (count > PAGE_SIZE - 2) 868 return -EINVAL; 869 870 kernbuf = kmalloc(count + 2, GFP_KERNEL); 871 if (!kernbuf) 872 return -ENOMEM; 873 874 if (copy_from_user(kernbuf, userbuf, count)) { 875 kfree(kernbuf); 876 return -EFAULT; 877 } 878 879 kernbuf[count] = 0; 880 strcat(kernbuf, ","); 881 ret = ibm->write(kernbuf); 882 if (ret == 0) 883 ret = count; 884 885 kfree(kernbuf); 886 887 return ret; 888 } 889 890 static const struct file_operations dispatch_proc_fops = { 891 .owner = THIS_MODULE, 892 .open = dispatch_proc_open, 893 .read = seq_read, 894 .llseek = seq_lseek, 895 .release = single_release, 896 .write = dispatch_proc_write, 897 }; 898 899 static char *next_cmd(char **cmds) 900 { 901 char *start = *cmds; 902 char *end; 903 904 while ((end = strchr(start, ',')) && end == start) 905 start = end + 1; 906 907 if (!end) 908 return NULL; 909 910 *end = 0; 911 *cmds = end + 1; 912 return start; 913 } 914 915 916 /**************************************************************************** 917 **************************************************************************** 918 * 919 * Device model: input, hwmon and platform 920 * 921 **************************************************************************** 922 ****************************************************************************/ 923 924 static struct platform_device *tpacpi_pdev; 925 static struct platform_device *tpacpi_sensors_pdev; 926 static struct device *tpacpi_hwmon; 927 static struct input_dev *tpacpi_inputdev; 928 static struct mutex tpacpi_inputdev_send_mutex; 929 static LIST_HEAD(tpacpi_all_drivers); 930 931 #ifdef CONFIG_PM_SLEEP 932 static int tpacpi_suspend_handler(struct device *dev) 933 { 934 struct ibm_struct *ibm, *itmp; 935 936 list_for_each_entry_safe(ibm, itmp, 937 &tpacpi_all_drivers, 938 all_drivers) { 939 if (ibm->suspend) 940 (ibm->suspend)(); 941 } 942 943 return 0; 944 } 945 946 static int tpacpi_resume_handler(struct device *dev) 947 { 948 struct ibm_struct *ibm, *itmp; 949 950 list_for_each_entry_safe(ibm, itmp, 951 &tpacpi_all_drivers, 952 all_drivers) { 953 if (ibm->resume) 954 (ibm->resume)(); 955 } 956 957 return 0; 958 } 959 #endif 960 961 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 962 tpacpi_suspend_handler, tpacpi_resume_handler); 963 964 static void tpacpi_shutdown_handler(struct platform_device *pdev) 965 { 966 struct ibm_struct *ibm, *itmp; 967 968 list_for_each_entry_safe(ibm, itmp, 969 &tpacpi_all_drivers, 970 all_drivers) { 971 if (ibm->shutdown) 972 (ibm->shutdown)(); 973 } 974 } 975 976 static struct platform_driver tpacpi_pdriver = { 977 .driver = { 978 .name = TPACPI_DRVR_NAME, 979 .pm = &tpacpi_pm, 980 }, 981 .shutdown = tpacpi_shutdown_handler, 982 }; 983 984 static struct platform_driver tpacpi_hwmon_pdriver = { 985 .driver = { 986 .name = TPACPI_HWMON_DRVR_NAME, 987 }, 988 }; 989 990 /************************************************************************* 991 * sysfs support helpers 992 */ 993 994 struct attribute_set { 995 unsigned int members, max_members; 996 struct attribute_group group; 997 }; 998 999 struct attribute_set_obj { 1000 struct attribute_set s; 1001 struct attribute *a; 1002 } __attribute__((packed)); 1003 1004 static struct attribute_set *create_attr_set(unsigned int max_members, 1005 const char *name) 1006 { 1007 struct attribute_set_obj *sobj; 1008 1009 if (max_members == 0) 1010 return NULL; 1011 1012 /* Allocates space for implicit NULL at the end too */ 1013 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1014 max_members * sizeof(struct attribute *), 1015 GFP_KERNEL); 1016 if (!sobj) 1017 return NULL; 1018 sobj->s.max_members = max_members; 1019 sobj->s.group.attrs = &sobj->a; 1020 sobj->s.group.name = name; 1021 1022 return &sobj->s; 1023 } 1024 1025 #define destroy_attr_set(_set) \ 1026 kfree(_set); 1027 1028 /* not multi-threaded safe, use it in a single thread per set */ 1029 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1030 { 1031 if (!s || !attr) 1032 return -EINVAL; 1033 1034 if (s->members >= s->max_members) 1035 return -ENOMEM; 1036 1037 s->group.attrs[s->members] = attr; 1038 s->members++; 1039 1040 return 0; 1041 } 1042 1043 static int add_many_to_attr_set(struct attribute_set *s, 1044 struct attribute **attr, 1045 unsigned int count) 1046 { 1047 int i, res; 1048 1049 for (i = 0; i < count; i++) { 1050 res = add_to_attr_set(s, attr[i]); 1051 if (res) 1052 return res; 1053 } 1054 1055 return 0; 1056 } 1057 1058 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1059 { 1060 sysfs_remove_group(kobj, &s->group); 1061 destroy_attr_set(s); 1062 } 1063 1064 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1065 sysfs_create_group(_kobj, &_attr_set->group) 1066 1067 static int parse_strtoul(const char *buf, 1068 unsigned long max, unsigned long *value) 1069 { 1070 char *endp; 1071 1072 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1073 endp = skip_spaces(endp); 1074 if (*endp || *value > max) 1075 return -EINVAL; 1076 1077 return 0; 1078 } 1079 1080 static void tpacpi_disable_brightness_delay(void) 1081 { 1082 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1083 pr_notice("ACPI backlight control delay disabled\n"); 1084 } 1085 1086 static void printk_deprecated_attribute(const char * const what, 1087 const char * const details) 1088 { 1089 tpacpi_log_usertask("deprecated sysfs attribute"); 1090 pr_warn("WARNING: sysfs attribute %s is deprecated and " 1091 "will be removed. %s\n", 1092 what, details); 1093 } 1094 1095 /************************************************************************* 1096 * rfkill and radio control support helpers 1097 */ 1098 1099 /* 1100 * ThinkPad-ACPI firmware handling model: 1101 * 1102 * WLSW (master wireless switch) is event-driven, and is common to all 1103 * firmware-controlled radios. It cannot be controlled, just monitored, 1104 * as expected. It overrides all radio state in firmware 1105 * 1106 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1107 * (TODO: verify how WLSW interacts with the returned radio state). 1108 * 1109 * The only time there are shadow radio state changes, is when 1110 * masked-off hotkeys are used. 1111 */ 1112 1113 /* 1114 * Internal driver API for radio state: 1115 * 1116 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1117 * bool: true means radio blocked (off) 1118 */ 1119 enum tpacpi_rfkill_state { 1120 TPACPI_RFK_RADIO_OFF = 0, 1121 TPACPI_RFK_RADIO_ON 1122 }; 1123 1124 /* rfkill switches */ 1125 enum tpacpi_rfk_id { 1126 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1127 TPACPI_RFK_WWAN_SW_ID, 1128 TPACPI_RFK_UWB_SW_ID, 1129 TPACPI_RFK_SW_MAX 1130 }; 1131 1132 static const char *tpacpi_rfkill_names[] = { 1133 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1134 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1135 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1136 [TPACPI_RFK_SW_MAX] = NULL 1137 }; 1138 1139 /* ThinkPad-ACPI rfkill subdriver */ 1140 struct tpacpi_rfk { 1141 struct rfkill *rfkill; 1142 enum tpacpi_rfk_id id; 1143 const struct tpacpi_rfk_ops *ops; 1144 }; 1145 1146 struct tpacpi_rfk_ops { 1147 /* firmware interface */ 1148 int (*get_status)(void); 1149 int (*set_status)(const enum tpacpi_rfkill_state); 1150 }; 1151 1152 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1153 1154 /* Query FW and update rfkill sw state for a given rfkill switch */ 1155 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1156 { 1157 int status; 1158 1159 if (!tp_rfk) 1160 return -ENODEV; 1161 1162 status = (tp_rfk->ops->get_status)(); 1163 if (status < 0) 1164 return status; 1165 1166 rfkill_set_sw_state(tp_rfk->rfkill, 1167 (status == TPACPI_RFK_RADIO_OFF)); 1168 1169 return status; 1170 } 1171 1172 /* Query FW and update rfkill sw state for all rfkill switches */ 1173 static void tpacpi_rfk_update_swstate_all(void) 1174 { 1175 unsigned int i; 1176 1177 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1178 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1179 } 1180 1181 /* 1182 * Sync the HW-blocking state of all rfkill switches, 1183 * do notice it causes the rfkill core to schedule uevents 1184 */ 1185 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1186 { 1187 unsigned int i; 1188 struct tpacpi_rfk *tp_rfk; 1189 1190 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1191 tp_rfk = tpacpi_rfkill_switches[i]; 1192 if (tp_rfk) { 1193 if (rfkill_set_hw_state(tp_rfk->rfkill, 1194 blocked)) { 1195 /* ignore -- we track sw block */ 1196 } 1197 } 1198 } 1199 } 1200 1201 /* Call to get the WLSW state from the firmware */ 1202 static int hotkey_get_wlsw(void); 1203 1204 /* Call to query WLSW state and update all rfkill switches */ 1205 static bool tpacpi_rfk_check_hwblock_state(void) 1206 { 1207 int res = hotkey_get_wlsw(); 1208 int hw_blocked; 1209 1210 /* When unknown or unsupported, we have to assume it is unblocked */ 1211 if (res < 0) 1212 return false; 1213 1214 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1215 tpacpi_rfk_update_hwblock_state(hw_blocked); 1216 1217 return hw_blocked; 1218 } 1219 1220 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1221 { 1222 struct tpacpi_rfk *tp_rfk = data; 1223 int res; 1224 1225 dbg_printk(TPACPI_DBG_RFKILL, 1226 "request to change radio state to %s\n", 1227 blocked ? "blocked" : "unblocked"); 1228 1229 /* try to set radio state */ 1230 res = (tp_rfk->ops->set_status)(blocked ? 1231 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1232 1233 /* and update the rfkill core with whatever the FW really did */ 1234 tpacpi_rfk_update_swstate(tp_rfk); 1235 1236 return (res < 0) ? res : 0; 1237 } 1238 1239 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1240 .set_block = tpacpi_rfk_hook_set_block, 1241 }; 1242 1243 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1244 const struct tpacpi_rfk_ops *tp_rfkops, 1245 const enum rfkill_type rfktype, 1246 const char *name, 1247 const bool set_default) 1248 { 1249 struct tpacpi_rfk *atp_rfk; 1250 int res; 1251 bool sw_state = false; 1252 bool hw_state; 1253 int sw_status; 1254 1255 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1256 1257 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1258 if (atp_rfk) 1259 atp_rfk->rfkill = rfkill_alloc(name, 1260 &tpacpi_pdev->dev, 1261 rfktype, 1262 &tpacpi_rfk_rfkill_ops, 1263 atp_rfk); 1264 if (!atp_rfk || !atp_rfk->rfkill) { 1265 pr_err("failed to allocate memory for rfkill class\n"); 1266 kfree(atp_rfk); 1267 return -ENOMEM; 1268 } 1269 1270 atp_rfk->id = id; 1271 atp_rfk->ops = tp_rfkops; 1272 1273 sw_status = (tp_rfkops->get_status)(); 1274 if (sw_status < 0) { 1275 pr_err("failed to read initial state for %s, error %d\n", 1276 name, sw_status); 1277 } else { 1278 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1279 if (set_default) { 1280 /* try to keep the initial state, since we ask the 1281 * firmware to preserve it across S5 in NVRAM */ 1282 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1283 } 1284 } 1285 hw_state = tpacpi_rfk_check_hwblock_state(); 1286 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1287 1288 res = rfkill_register(atp_rfk->rfkill); 1289 if (res < 0) { 1290 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1291 rfkill_destroy(atp_rfk->rfkill); 1292 kfree(atp_rfk); 1293 return res; 1294 } 1295 1296 tpacpi_rfkill_switches[id] = atp_rfk; 1297 1298 pr_info("rfkill switch %s: radio is %sblocked\n", 1299 name, (sw_state || hw_state) ? "" : "un"); 1300 return 0; 1301 } 1302 1303 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1304 { 1305 struct tpacpi_rfk *tp_rfk; 1306 1307 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1308 1309 tp_rfk = tpacpi_rfkill_switches[id]; 1310 if (tp_rfk) { 1311 rfkill_unregister(tp_rfk->rfkill); 1312 rfkill_destroy(tp_rfk->rfkill); 1313 tpacpi_rfkill_switches[id] = NULL; 1314 kfree(tp_rfk); 1315 } 1316 } 1317 1318 static void printk_deprecated_rfkill_attribute(const char * const what) 1319 { 1320 printk_deprecated_attribute(what, 1321 "Please switch to generic rfkill before year 2010"); 1322 } 1323 1324 /* sysfs <radio> enable ------------------------------------------------ */ 1325 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1326 struct device_attribute *attr, 1327 char *buf) 1328 { 1329 int status; 1330 1331 printk_deprecated_rfkill_attribute(attr->attr.name); 1332 1333 /* This is in the ABI... */ 1334 if (tpacpi_rfk_check_hwblock_state()) { 1335 status = TPACPI_RFK_RADIO_OFF; 1336 } else { 1337 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1338 if (status < 0) 1339 return status; 1340 } 1341 1342 return snprintf(buf, PAGE_SIZE, "%d\n", 1343 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1344 } 1345 1346 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1347 struct device_attribute *attr, 1348 const char *buf, size_t count) 1349 { 1350 unsigned long t; 1351 int res; 1352 1353 printk_deprecated_rfkill_attribute(attr->attr.name); 1354 1355 if (parse_strtoul(buf, 1, &t)) 1356 return -EINVAL; 1357 1358 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1359 1360 /* This is in the ABI... */ 1361 if (tpacpi_rfk_check_hwblock_state() && !!t) 1362 return -EPERM; 1363 1364 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1365 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1366 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1367 1368 return (res < 0) ? res : count; 1369 } 1370 1371 /* procfs -------------------------------------------------------------- */ 1372 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1373 { 1374 if (id >= TPACPI_RFK_SW_MAX) 1375 seq_printf(m, "status:\t\tnot supported\n"); 1376 else { 1377 int status; 1378 1379 /* This is in the ABI... */ 1380 if (tpacpi_rfk_check_hwblock_state()) { 1381 status = TPACPI_RFK_RADIO_OFF; 1382 } else { 1383 status = tpacpi_rfk_update_swstate( 1384 tpacpi_rfkill_switches[id]); 1385 if (status < 0) 1386 return status; 1387 } 1388 1389 seq_printf(m, "status:\t\t%s\n", 1390 (status == TPACPI_RFK_RADIO_ON) ? 1391 "enabled" : "disabled"); 1392 seq_printf(m, "commands:\tenable, disable\n"); 1393 } 1394 1395 return 0; 1396 } 1397 1398 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1399 { 1400 char *cmd; 1401 int status = -1; 1402 int res = 0; 1403 1404 if (id >= TPACPI_RFK_SW_MAX) 1405 return -ENODEV; 1406 1407 while ((cmd = next_cmd(&buf))) { 1408 if (strlencmp(cmd, "enable") == 0) 1409 status = TPACPI_RFK_RADIO_ON; 1410 else if (strlencmp(cmd, "disable") == 0) 1411 status = TPACPI_RFK_RADIO_OFF; 1412 else 1413 return -EINVAL; 1414 } 1415 1416 if (status != -1) { 1417 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1418 (status == TPACPI_RFK_RADIO_ON) ? 1419 "enable" : "disable", 1420 tpacpi_rfkill_names[id]); 1421 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1422 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1423 } 1424 1425 return res; 1426 } 1427 1428 /************************************************************************* 1429 * thinkpad-acpi driver attributes 1430 */ 1431 1432 /* interface_version --------------------------------------------------- */ 1433 static ssize_t tpacpi_driver_interface_version_show( 1434 struct device_driver *drv, 1435 char *buf) 1436 { 1437 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1438 } 1439 1440 static DRIVER_ATTR(interface_version, S_IRUGO, 1441 tpacpi_driver_interface_version_show, NULL); 1442 1443 /* debug_level --------------------------------------------------------- */ 1444 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1445 char *buf) 1446 { 1447 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1448 } 1449 1450 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1451 const char *buf, size_t count) 1452 { 1453 unsigned long t; 1454 1455 if (parse_strtoul(buf, 0xffff, &t)) 1456 return -EINVAL; 1457 1458 dbg_level = t; 1459 1460 return count; 1461 } 1462 1463 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1464 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1465 1466 /* version ------------------------------------------------------------- */ 1467 static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1468 char *buf) 1469 { 1470 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1471 TPACPI_DESC, TPACPI_VERSION); 1472 } 1473 1474 static DRIVER_ATTR(version, S_IRUGO, 1475 tpacpi_driver_version_show, NULL); 1476 1477 /* --------------------------------------------------------------------- */ 1478 1479 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1480 1481 /* wlsw_emulstate ------------------------------------------------------ */ 1482 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1483 char *buf) 1484 { 1485 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1486 } 1487 1488 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1489 const char *buf, size_t count) 1490 { 1491 unsigned long t; 1492 1493 if (parse_strtoul(buf, 1, &t)) 1494 return -EINVAL; 1495 1496 if (tpacpi_wlsw_emulstate != !!t) { 1497 tpacpi_wlsw_emulstate = !!t; 1498 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1499 } 1500 1501 return count; 1502 } 1503 1504 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1505 tpacpi_driver_wlsw_emulstate_show, 1506 tpacpi_driver_wlsw_emulstate_store); 1507 1508 /* bluetooth_emulstate ------------------------------------------------- */ 1509 static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1510 struct device_driver *drv, 1511 char *buf) 1512 { 1513 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1514 } 1515 1516 static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1517 struct device_driver *drv, 1518 const char *buf, size_t count) 1519 { 1520 unsigned long t; 1521 1522 if (parse_strtoul(buf, 1, &t)) 1523 return -EINVAL; 1524 1525 tpacpi_bluetooth_emulstate = !!t; 1526 1527 return count; 1528 } 1529 1530 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1531 tpacpi_driver_bluetooth_emulstate_show, 1532 tpacpi_driver_bluetooth_emulstate_store); 1533 1534 /* wwan_emulstate ------------------------------------------------- */ 1535 static ssize_t tpacpi_driver_wwan_emulstate_show( 1536 struct device_driver *drv, 1537 char *buf) 1538 { 1539 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1540 } 1541 1542 static ssize_t tpacpi_driver_wwan_emulstate_store( 1543 struct device_driver *drv, 1544 const char *buf, size_t count) 1545 { 1546 unsigned long t; 1547 1548 if (parse_strtoul(buf, 1, &t)) 1549 return -EINVAL; 1550 1551 tpacpi_wwan_emulstate = !!t; 1552 1553 return count; 1554 } 1555 1556 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1557 tpacpi_driver_wwan_emulstate_show, 1558 tpacpi_driver_wwan_emulstate_store); 1559 1560 /* uwb_emulstate ------------------------------------------------- */ 1561 static ssize_t tpacpi_driver_uwb_emulstate_show( 1562 struct device_driver *drv, 1563 char *buf) 1564 { 1565 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1566 } 1567 1568 static ssize_t tpacpi_driver_uwb_emulstate_store( 1569 struct device_driver *drv, 1570 const char *buf, size_t count) 1571 { 1572 unsigned long t; 1573 1574 if (parse_strtoul(buf, 1, &t)) 1575 return -EINVAL; 1576 1577 tpacpi_uwb_emulstate = !!t; 1578 1579 return count; 1580 } 1581 1582 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1583 tpacpi_driver_uwb_emulstate_show, 1584 tpacpi_driver_uwb_emulstate_store); 1585 #endif 1586 1587 /* --------------------------------------------------------------------- */ 1588 1589 static struct driver_attribute *tpacpi_driver_attributes[] = { 1590 &driver_attr_debug_level, &driver_attr_version, 1591 &driver_attr_interface_version, 1592 }; 1593 1594 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1595 { 1596 int i, res; 1597 1598 i = 0; 1599 res = 0; 1600 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1601 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1602 i++; 1603 } 1604 1605 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1606 if (!res && dbg_wlswemul) 1607 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1608 if (!res && dbg_bluetoothemul) 1609 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1610 if (!res && dbg_wwanemul) 1611 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1612 if (!res && dbg_uwbemul) 1613 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1614 #endif 1615 1616 return res; 1617 } 1618 1619 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1620 { 1621 int i; 1622 1623 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1624 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1625 1626 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1627 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1628 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1629 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1630 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1631 #endif 1632 } 1633 1634 /************************************************************************* 1635 * Firmware Data 1636 */ 1637 1638 /* 1639 * Table of recommended minimum BIOS versions 1640 * 1641 * Reasons for listing: 1642 * 1. Stable BIOS, listed because the unknown amount of 1643 * bugs and bad ACPI behaviour on older versions 1644 * 1645 * 2. BIOS or EC fw with known bugs that trigger on Linux 1646 * 1647 * 3. BIOS with known reduced functionality in older versions 1648 * 1649 * We recommend the latest BIOS and EC version. 1650 * We only support the latest BIOS and EC fw version as a rule. 1651 * 1652 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1653 * Information from users in ThinkWiki 1654 * 1655 * WARNING: we use this table also to detect that the machine is 1656 * a ThinkPad in some cases, so don't remove entries lightly. 1657 */ 1658 1659 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1660 { .vendor = (__v), \ 1661 .bios = TPID(__id1, __id2), \ 1662 .ec = TPACPI_MATCH_ANY, \ 1663 .quirks = TPACPI_MATCH_ANY << 16 \ 1664 | (__bv1) << 8 | (__bv2) } 1665 1666 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1667 __eid, __ev1, __ev2) \ 1668 { .vendor = (__v), \ 1669 .bios = TPID(__bid1, __bid2), \ 1670 .ec = __eid, \ 1671 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1672 | (__bv1) << 8 | (__bv2) } 1673 1674 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1675 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1676 1677 /* Outdated IBM BIOSes often lack the EC id string */ 1678 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1679 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1680 __bv1, __bv2, TPID(__id1, __id2), \ 1681 __ev1, __ev2), \ 1682 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1683 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1684 __ev1, __ev2) 1685 1686 /* Outdated IBM BIOSes often lack the EC id string */ 1687 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1688 __eid1, __eid2, __ev1, __ev2) \ 1689 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1690 __bv1, __bv2, TPID(__eid1, __eid2), \ 1691 __ev1, __ev2), \ 1692 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1693 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1694 __ev1, __ev2) 1695 1696 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1697 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1698 1699 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1700 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1701 __bv1, __bv2, TPID(__id1, __id2), \ 1702 __ev1, __ev2) 1703 1704 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1705 __eid1, __eid2, __ev1, __ev2) \ 1706 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1707 __bv1, __bv2, TPID(__eid1, __eid2), \ 1708 __ev1, __ev2) 1709 1710 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1711 /* Numeric models ------------------ */ 1712 /* FW MODEL BIOS VERS */ 1713 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1714 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1715 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1716 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1717 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1718 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1719 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1720 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1721 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1722 1723 /* A-series ------------------------- */ 1724 /* FW MODEL BIOS VERS EC VERS */ 1725 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1726 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1727 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1728 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1729 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1730 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1731 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1732 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1733 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1734 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1735 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1736 1737 /* G-series ------------------------- */ 1738 /* FW MODEL BIOS VERS */ 1739 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1740 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1741 1742 /* R-series, T-series --------------- */ 1743 /* FW MODEL BIOS VERS EC VERS */ 1744 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1745 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1746 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1747 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1748 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1749 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1750 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1751 T40/p, T41/p, T42/p (1) */ 1752 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1753 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1754 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1755 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1756 1757 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1758 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1759 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1760 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1761 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1762 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1763 1764 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1765 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1766 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1767 1768 /* BIOS FW BIOS VERS EC FW EC VERS */ 1769 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1770 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1771 1772 /* X-series ------------------------- */ 1773 /* FW MODEL BIOS VERS EC VERS */ 1774 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1775 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1776 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1777 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1778 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1779 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1780 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1781 1782 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1783 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1784 1785 /* (0) - older versions lack DMI EC fw string and functionality */ 1786 /* (1) - older versions known to lack functionality */ 1787 }; 1788 1789 #undef TPV_QL1 1790 #undef TPV_QL0 1791 #undef TPV_QI2 1792 #undef TPV_QI1 1793 #undef TPV_QI0 1794 #undef TPV_Q_X 1795 #undef TPV_Q 1796 1797 static void __init tpacpi_check_outdated_fw(void) 1798 { 1799 unsigned long fwvers; 1800 u16 ec_version, bios_version; 1801 1802 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1803 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1804 1805 if (!fwvers) 1806 return; 1807 1808 bios_version = fwvers & 0xffffU; 1809 ec_version = (fwvers >> 16) & 0xffffU; 1810 1811 /* note that unknown versions are set to 0x0000 and we use that */ 1812 if ((bios_version > thinkpad_id.bios_release) || 1813 (ec_version > thinkpad_id.ec_release && 1814 ec_version != TPACPI_MATCH_ANY)) { 1815 /* 1816 * The changelogs would let us track down the exact 1817 * reason, but it is just too much of a pain to track 1818 * it. We only list BIOSes that are either really 1819 * broken, or really stable to begin with, so it is 1820 * best if the user upgrades the firmware anyway. 1821 */ 1822 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1823 pr_warn("WARNING: This firmware may be missing critical bug " 1824 "fixes and/or important features\n"); 1825 } 1826 } 1827 1828 static bool __init tpacpi_is_fw_known(void) 1829 { 1830 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1831 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1832 } 1833 1834 /**************************************************************************** 1835 **************************************************************************** 1836 * 1837 * Subdrivers 1838 * 1839 **************************************************************************** 1840 ****************************************************************************/ 1841 1842 /************************************************************************* 1843 * thinkpad-acpi metadata subdriver 1844 */ 1845 1846 static int thinkpad_acpi_driver_read(struct seq_file *m) 1847 { 1848 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1849 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1850 return 0; 1851 } 1852 1853 static struct ibm_struct thinkpad_acpi_driver_data = { 1854 .name = "driver", 1855 .read = thinkpad_acpi_driver_read, 1856 }; 1857 1858 /************************************************************************* 1859 * Hotkey subdriver 1860 */ 1861 1862 /* 1863 * ThinkPad firmware event model 1864 * 1865 * The ThinkPad firmware has two main event interfaces: normal ACPI 1866 * notifications (which follow the ACPI standard), and a private event 1867 * interface. 1868 * 1869 * The private event interface also issues events for the hotkeys. As 1870 * the driver gained features, the event handling code ended up being 1871 * built around the hotkey subdriver. This will need to be refactored 1872 * to a more formal event API eventually. 1873 * 1874 * Some "hotkeys" are actually supposed to be used as event reports, 1875 * such as "brightness has changed", "volume has changed", depending on 1876 * the ThinkPad model and how the firmware is operating. 1877 * 1878 * Unlike other classes, hotkey-class events have mask/unmask control on 1879 * non-ancient firmware. However, how it behaves changes a lot with the 1880 * firmware model and version. 1881 */ 1882 1883 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1884 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1885 TP_ACPI_HOTKEYSCAN_FNF2, 1886 TP_ACPI_HOTKEYSCAN_FNF3, 1887 TP_ACPI_HOTKEYSCAN_FNF4, 1888 TP_ACPI_HOTKEYSCAN_FNF5, 1889 TP_ACPI_HOTKEYSCAN_FNF6, 1890 TP_ACPI_HOTKEYSCAN_FNF7, 1891 TP_ACPI_HOTKEYSCAN_FNF8, 1892 TP_ACPI_HOTKEYSCAN_FNF9, 1893 TP_ACPI_HOTKEYSCAN_FNF10, 1894 TP_ACPI_HOTKEYSCAN_FNF11, 1895 TP_ACPI_HOTKEYSCAN_FNF12, 1896 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1897 TP_ACPI_HOTKEYSCAN_FNINSERT, 1898 TP_ACPI_HOTKEYSCAN_FNDELETE, 1899 TP_ACPI_HOTKEYSCAN_FNHOME, 1900 TP_ACPI_HOTKEYSCAN_FNEND, 1901 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1902 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1903 TP_ACPI_HOTKEYSCAN_FNSPACE, 1904 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1905 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1906 TP_ACPI_HOTKEYSCAN_MUTE, 1907 TP_ACPI_HOTKEYSCAN_THINKPAD, 1908 TP_ACPI_HOTKEYSCAN_UNK1, 1909 TP_ACPI_HOTKEYSCAN_UNK2, 1910 TP_ACPI_HOTKEYSCAN_UNK3, 1911 TP_ACPI_HOTKEYSCAN_UNK4, 1912 TP_ACPI_HOTKEYSCAN_UNK5, 1913 TP_ACPI_HOTKEYSCAN_UNK6, 1914 TP_ACPI_HOTKEYSCAN_UNK7, 1915 TP_ACPI_HOTKEYSCAN_UNK8, 1916 1917 TP_ACPI_HOTKEYSCAN_MUTE2, 1918 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1919 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1920 TP_ACPI_HOTKEYSCAN_CLOUD, 1921 TP_ACPI_HOTKEYSCAN_UNK9, 1922 TP_ACPI_HOTKEYSCAN_VOICE, 1923 TP_ACPI_HOTKEYSCAN_UNK10, 1924 TP_ACPI_HOTKEYSCAN_GESTURES, 1925 TP_ACPI_HOTKEYSCAN_UNK11, 1926 TP_ACPI_HOTKEYSCAN_UNK12, 1927 TP_ACPI_HOTKEYSCAN_UNK13, 1928 TP_ACPI_HOTKEYSCAN_CONFIG, 1929 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1930 TP_ACPI_HOTKEYSCAN_RELOAD, 1931 TP_ACPI_HOTKEYSCAN_BACK, 1932 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1933 TP_ACPI_HOTKEYSCAN_MIC_UP, 1934 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1935 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1936 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1937 1938 /* Hotkey keymap size */ 1939 TPACPI_HOTKEY_MAP_LEN 1940 }; 1941 1942 enum { /* Keys/events available through NVRAM polling */ 1943 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1944 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1945 }; 1946 1947 enum { /* Positions of some of the keys in hotkey masks */ 1948 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1949 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1950 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1951 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1952 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1953 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1954 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1955 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1956 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1957 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1958 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1959 }; 1960 1961 enum { /* NVRAM to ACPI HKEY group map */ 1962 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1963 TP_ACPI_HKEY_ZOOM_MASK | 1964 TP_ACPI_HKEY_DISPSWTCH_MASK | 1965 TP_ACPI_HKEY_HIBERNATE_MASK, 1966 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1967 TP_ACPI_HKEY_BRGHTDWN_MASK, 1968 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1969 TP_ACPI_HKEY_VOLDWN_MASK | 1970 TP_ACPI_HKEY_MUTE_MASK, 1971 }; 1972 1973 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1974 struct tp_nvram_state { 1975 u16 thinkpad_toggle:1; 1976 u16 zoom_toggle:1; 1977 u16 display_toggle:1; 1978 u16 thinklight_toggle:1; 1979 u16 hibernate_toggle:1; 1980 u16 displayexp_toggle:1; 1981 u16 display_state:1; 1982 u16 brightness_toggle:1; 1983 u16 volume_toggle:1; 1984 u16 mute:1; 1985 1986 u8 brightness_level; 1987 u8 volume_level; 1988 }; 1989 1990 /* kthread for the hotkey poller */ 1991 static struct task_struct *tpacpi_hotkey_task; 1992 1993 /* 1994 * Acquire mutex to write poller control variables as an 1995 * atomic block. 1996 * 1997 * Increment hotkey_config_change when changing them if you 1998 * want the kthread to forget old state. 1999 * 2000 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2001 */ 2002 static struct mutex hotkey_thread_data_mutex; 2003 static unsigned int hotkey_config_change; 2004 2005 /* 2006 * hotkey poller control variables 2007 * 2008 * Must be atomic or readers will also need to acquire mutex 2009 * 2010 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2011 * should be used only when the changes need to be taken as 2012 * a block, OR when one needs to force the kthread to forget 2013 * old state. 2014 */ 2015 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2016 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2017 2018 #define HOTKEY_CONFIG_CRITICAL_START \ 2019 do { \ 2020 mutex_lock(&hotkey_thread_data_mutex); \ 2021 hotkey_config_change++; \ 2022 } while (0); 2023 #define HOTKEY_CONFIG_CRITICAL_END \ 2024 mutex_unlock(&hotkey_thread_data_mutex); 2025 2026 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2027 2028 #define hotkey_source_mask 0U 2029 #define HOTKEY_CONFIG_CRITICAL_START 2030 #define HOTKEY_CONFIG_CRITICAL_END 2031 2032 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2033 2034 static struct mutex hotkey_mutex; 2035 2036 static enum { /* Reasons for waking up */ 2037 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2038 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2039 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2040 } hotkey_wakeup_reason; 2041 2042 static int hotkey_autosleep_ack; 2043 2044 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2045 static u32 hotkey_all_mask; /* all events supported in fw */ 2046 static u32 hotkey_reserved_mask; /* events better left disabled */ 2047 static u32 hotkey_driver_mask; /* events needed by the driver */ 2048 static u32 hotkey_user_mask; /* events visible to userspace */ 2049 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2050 2051 static u16 *hotkey_keycode_map; 2052 2053 static struct attribute_set *hotkey_dev_attributes; 2054 2055 static void tpacpi_driver_event(const unsigned int hkey_event); 2056 static void hotkey_driver_event(const unsigned int scancode); 2057 static void hotkey_poll_setup(const bool may_warn); 2058 2059 /* HKEY.MHKG() return bits */ 2060 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2061 2062 static int hotkey_get_wlsw(void) 2063 { 2064 int status; 2065 2066 if (!tp_features.hotkey_wlsw) 2067 return -ENODEV; 2068 2069 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2070 if (dbg_wlswemul) 2071 return (tpacpi_wlsw_emulstate) ? 2072 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2073 #endif 2074 2075 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2076 return -EIO; 2077 2078 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2079 } 2080 2081 static int hotkey_get_tablet_mode(int *status) 2082 { 2083 int s; 2084 2085 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2086 return -EIO; 2087 2088 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2089 return 0; 2090 } 2091 2092 /* 2093 * Reads current event mask from firmware, and updates 2094 * hotkey_acpi_mask accordingly. Also resets any bits 2095 * from hotkey_user_mask that are unavailable to be 2096 * delivered (shadow requirement of the userspace ABI). 2097 * 2098 * Call with hotkey_mutex held 2099 */ 2100 static int hotkey_mask_get(void) 2101 { 2102 if (tp_features.hotkey_mask) { 2103 u32 m = 0; 2104 2105 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2106 return -EIO; 2107 2108 hotkey_acpi_mask = m; 2109 } else { 2110 /* no mask support doesn't mean no event support... */ 2111 hotkey_acpi_mask = hotkey_all_mask; 2112 } 2113 2114 /* sync userspace-visible mask */ 2115 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2116 2117 return 0; 2118 } 2119 2120 static void hotkey_mask_warn_incomplete_mask(void) 2121 { 2122 /* log only what the user can fix... */ 2123 const u32 wantedmask = hotkey_driver_mask & 2124 ~(hotkey_acpi_mask | hotkey_source_mask) & 2125 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2126 2127 if (wantedmask) 2128 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2129 } 2130 2131 /* 2132 * Set the firmware mask when supported 2133 * 2134 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2135 * 2136 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2137 * 2138 * Call with hotkey_mutex held 2139 */ 2140 static int hotkey_mask_set(u32 mask) 2141 { 2142 int i; 2143 int rc = 0; 2144 2145 const u32 fwmask = mask & ~hotkey_source_mask; 2146 2147 if (tp_features.hotkey_mask) { 2148 for (i = 0; i < 32; i++) { 2149 if (!acpi_evalf(hkey_handle, 2150 NULL, "MHKM", "vdd", i + 1, 2151 !!(mask & (1 << i)))) { 2152 rc = -EIO; 2153 break; 2154 } 2155 } 2156 } 2157 2158 /* 2159 * We *must* make an inconditional call to hotkey_mask_get to 2160 * refresh hotkey_acpi_mask and update hotkey_user_mask 2161 * 2162 * Take the opportunity to also log when we cannot _enable_ 2163 * a given event. 2164 */ 2165 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2166 pr_notice("asked for hotkey mask 0x%08x, but " 2167 "firmware forced it to 0x%08x\n", 2168 fwmask, hotkey_acpi_mask); 2169 } 2170 2171 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2172 hotkey_mask_warn_incomplete_mask(); 2173 2174 return rc; 2175 } 2176 2177 /* 2178 * Sets hotkey_user_mask and tries to set the firmware mask 2179 * 2180 * Call with hotkey_mutex held 2181 */ 2182 static int hotkey_user_mask_set(const u32 mask) 2183 { 2184 int rc; 2185 2186 /* Give people a chance to notice they are doing something that 2187 * is bound to go boom on their users sooner or later */ 2188 if (!tp_warned.hotkey_mask_ff && 2189 (mask == 0xffff || mask == 0xffffff || 2190 mask == 0xffffffff)) { 2191 tp_warned.hotkey_mask_ff = 1; 2192 pr_notice("setting the hotkey mask to 0x%08x is likely " 2193 "not the best way to go about it\n", mask); 2194 pr_notice("please consider using the driver defaults, " 2195 "and refer to up-to-date thinkpad-acpi " 2196 "documentation\n"); 2197 } 2198 2199 /* Try to enable what the user asked for, plus whatever we need. 2200 * this syncs everything but won't enable bits in hotkey_user_mask */ 2201 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2202 2203 /* Enable the available bits in hotkey_user_mask */ 2204 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2205 2206 return rc; 2207 } 2208 2209 /* 2210 * Sets the driver hotkey mask. 2211 * 2212 * Can be called even if the hotkey subdriver is inactive 2213 */ 2214 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2215 { 2216 int rc; 2217 2218 /* Do the right thing if hotkey_init has not been called yet */ 2219 if (!tp_features.hotkey) { 2220 hotkey_driver_mask = mask; 2221 return 0; 2222 } 2223 2224 mutex_lock(&hotkey_mutex); 2225 2226 HOTKEY_CONFIG_CRITICAL_START 2227 hotkey_driver_mask = mask; 2228 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2229 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2230 #endif 2231 HOTKEY_CONFIG_CRITICAL_END 2232 2233 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2234 ~hotkey_source_mask); 2235 hotkey_poll_setup(true); 2236 2237 mutex_unlock(&hotkey_mutex); 2238 2239 return rc; 2240 } 2241 2242 static int hotkey_status_get(int *status) 2243 { 2244 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2245 return -EIO; 2246 2247 return 0; 2248 } 2249 2250 static int hotkey_status_set(bool enable) 2251 { 2252 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2253 return -EIO; 2254 2255 return 0; 2256 } 2257 2258 static void tpacpi_input_send_tabletsw(void) 2259 { 2260 int state; 2261 2262 if (tp_features.hotkey_tablet && 2263 !hotkey_get_tablet_mode(&state)) { 2264 mutex_lock(&tpacpi_inputdev_send_mutex); 2265 2266 input_report_switch(tpacpi_inputdev, 2267 SW_TABLET_MODE, !!state); 2268 input_sync(tpacpi_inputdev); 2269 2270 mutex_unlock(&tpacpi_inputdev_send_mutex); 2271 } 2272 } 2273 2274 /* Do NOT call without validating scancode first */ 2275 static void tpacpi_input_send_key(const unsigned int scancode) 2276 { 2277 const unsigned int keycode = hotkey_keycode_map[scancode]; 2278 2279 if (keycode != KEY_RESERVED) { 2280 mutex_lock(&tpacpi_inputdev_send_mutex); 2281 2282 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2283 input_report_key(tpacpi_inputdev, keycode, 1); 2284 input_sync(tpacpi_inputdev); 2285 2286 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2287 input_report_key(tpacpi_inputdev, keycode, 0); 2288 input_sync(tpacpi_inputdev); 2289 2290 mutex_unlock(&tpacpi_inputdev_send_mutex); 2291 } 2292 } 2293 2294 /* Do NOT call without validating scancode first */ 2295 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2296 { 2297 hotkey_driver_event(scancode); 2298 if (hotkey_user_mask & (1 << scancode)) 2299 tpacpi_input_send_key(scancode); 2300 } 2301 2302 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2303 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2304 2305 /* Do NOT call without validating scancode first */ 2306 static void tpacpi_hotkey_send_key(unsigned int scancode) 2307 { 2308 tpacpi_input_send_key_masked(scancode); 2309 } 2310 2311 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2312 { 2313 u8 d; 2314 2315 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2316 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2317 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2318 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2319 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2320 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2321 } 2322 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2323 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2324 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2325 } 2326 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2327 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2328 n->displayexp_toggle = 2329 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2330 } 2331 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2332 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2333 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2334 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2335 n->brightness_toggle = 2336 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2337 } 2338 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2339 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2340 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2341 >> TP_NVRAM_POS_LEVEL_VOLUME; 2342 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2343 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2344 } 2345 } 2346 2347 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2348 do { \ 2349 if ((event_mask & (1 << __scancode)) && \ 2350 oldn->__member != newn->__member) \ 2351 tpacpi_hotkey_send_key(__scancode); \ 2352 } while (0) 2353 2354 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2355 do { \ 2356 if (event_mask & (1 << __scancode)) \ 2357 tpacpi_hotkey_send_key(__scancode); \ 2358 } while (0) 2359 2360 static void issue_volchange(const unsigned int oldvol, 2361 const unsigned int newvol, 2362 const u32 event_mask) 2363 { 2364 unsigned int i = oldvol; 2365 2366 while (i > newvol) { 2367 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2368 i--; 2369 } 2370 while (i < newvol) { 2371 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2372 i++; 2373 } 2374 } 2375 2376 static void issue_brightnesschange(const unsigned int oldbrt, 2377 const unsigned int newbrt, 2378 const u32 event_mask) 2379 { 2380 unsigned int i = oldbrt; 2381 2382 while (i > newbrt) { 2383 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2384 i--; 2385 } 2386 while (i < newbrt) { 2387 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2388 i++; 2389 } 2390 } 2391 2392 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2393 struct tp_nvram_state *newn, 2394 const u32 event_mask) 2395 { 2396 2397 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2398 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2399 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2400 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2401 2402 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2403 2404 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2405 2406 /* 2407 * Handle volume 2408 * 2409 * This code is supposed to duplicate the IBM firmware behaviour: 2410 * - Pressing MUTE issues mute hotkey message, even when already mute 2411 * - Pressing Volume up/down issues volume up/down hotkey messages, 2412 * even when already at maximum or minimum volume 2413 * - The act of unmuting issues volume up/down notification, 2414 * depending which key was used to unmute 2415 * 2416 * We are constrained to what the NVRAM can tell us, which is not much 2417 * and certainly not enough if more than one volume hotkey was pressed 2418 * since the last poll cycle. 2419 * 2420 * Just to make our life interesting, some newer Lenovo ThinkPads have 2421 * bugs in the BIOS and may fail to update volume_toggle properly. 2422 */ 2423 if (newn->mute) { 2424 /* muted */ 2425 if (!oldn->mute || 2426 oldn->volume_toggle != newn->volume_toggle || 2427 oldn->volume_level != newn->volume_level) { 2428 /* recently muted, or repeated mute keypress, or 2429 * multiple presses ending in mute */ 2430 issue_volchange(oldn->volume_level, newn->volume_level, 2431 event_mask); 2432 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2433 } 2434 } else { 2435 /* unmute */ 2436 if (oldn->mute) { 2437 /* recently unmuted, issue 'unmute' keypress */ 2438 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2439 } 2440 if (oldn->volume_level != newn->volume_level) { 2441 issue_volchange(oldn->volume_level, newn->volume_level, 2442 event_mask); 2443 } else if (oldn->volume_toggle != newn->volume_toggle) { 2444 /* repeated vol up/down keypress at end of scale ? */ 2445 if (newn->volume_level == 0) 2446 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2447 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2448 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2449 } 2450 } 2451 2452 /* handle brightness */ 2453 if (oldn->brightness_level != newn->brightness_level) { 2454 issue_brightnesschange(oldn->brightness_level, 2455 newn->brightness_level, event_mask); 2456 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2457 /* repeated key presses that didn't change state */ 2458 if (newn->brightness_level == 0) 2459 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2460 else if (newn->brightness_level >= bright_maxlvl 2461 && !tp_features.bright_unkfw) 2462 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2463 } 2464 2465 #undef TPACPI_COMPARE_KEY 2466 #undef TPACPI_MAY_SEND_KEY 2467 } 2468 2469 /* 2470 * Polling driver 2471 * 2472 * We track all events in hotkey_source_mask all the time, since 2473 * most of them are edge-based. We only issue those requested by 2474 * hotkey_user_mask or hotkey_driver_mask, though. 2475 */ 2476 static int hotkey_kthread(void *data) 2477 { 2478 struct tp_nvram_state s[2]; 2479 u32 poll_mask, event_mask; 2480 unsigned int si, so; 2481 unsigned long t; 2482 unsigned int change_detector; 2483 unsigned int poll_freq; 2484 bool was_frozen; 2485 2486 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2487 goto exit; 2488 2489 set_freezable(); 2490 2491 so = 0; 2492 si = 1; 2493 t = 0; 2494 2495 /* Initial state for compares */ 2496 mutex_lock(&hotkey_thread_data_mutex); 2497 change_detector = hotkey_config_change; 2498 poll_mask = hotkey_source_mask; 2499 event_mask = hotkey_source_mask & 2500 (hotkey_driver_mask | hotkey_user_mask); 2501 poll_freq = hotkey_poll_freq; 2502 mutex_unlock(&hotkey_thread_data_mutex); 2503 hotkey_read_nvram(&s[so], poll_mask); 2504 2505 while (!kthread_should_stop()) { 2506 if (t == 0) { 2507 if (likely(poll_freq)) 2508 t = 1000/poll_freq; 2509 else 2510 t = 100; /* should never happen... */ 2511 } 2512 t = msleep_interruptible(t); 2513 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2514 break; 2515 2516 if (t > 0 && !was_frozen) 2517 continue; 2518 2519 mutex_lock(&hotkey_thread_data_mutex); 2520 if (was_frozen || hotkey_config_change != change_detector) { 2521 /* forget old state on thaw or config change */ 2522 si = so; 2523 t = 0; 2524 change_detector = hotkey_config_change; 2525 } 2526 poll_mask = hotkey_source_mask; 2527 event_mask = hotkey_source_mask & 2528 (hotkey_driver_mask | hotkey_user_mask); 2529 poll_freq = hotkey_poll_freq; 2530 mutex_unlock(&hotkey_thread_data_mutex); 2531 2532 if (likely(poll_mask)) { 2533 hotkey_read_nvram(&s[si], poll_mask); 2534 if (likely(si != so)) { 2535 hotkey_compare_and_issue_event(&s[so], &s[si], 2536 event_mask); 2537 } 2538 } 2539 2540 so = si; 2541 si ^= 1; 2542 } 2543 2544 exit: 2545 return 0; 2546 } 2547 2548 /* call with hotkey_mutex held */ 2549 static void hotkey_poll_stop_sync(void) 2550 { 2551 if (tpacpi_hotkey_task) { 2552 kthread_stop(tpacpi_hotkey_task); 2553 tpacpi_hotkey_task = NULL; 2554 } 2555 } 2556 2557 /* call with hotkey_mutex held */ 2558 static void hotkey_poll_setup(const bool may_warn) 2559 { 2560 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2561 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2562 2563 if (hotkey_poll_freq > 0 && 2564 (poll_driver_mask || 2565 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2566 if (!tpacpi_hotkey_task) { 2567 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2568 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2569 if (IS_ERR(tpacpi_hotkey_task)) { 2570 tpacpi_hotkey_task = NULL; 2571 pr_err("could not create kernel thread " 2572 "for hotkey polling\n"); 2573 } 2574 } 2575 } else { 2576 hotkey_poll_stop_sync(); 2577 if (may_warn && (poll_driver_mask || poll_user_mask) && 2578 hotkey_poll_freq == 0) { 2579 pr_notice("hot keys 0x%08x and/or events 0x%08x " 2580 "require polling, which is currently " 2581 "disabled\n", 2582 poll_user_mask, poll_driver_mask); 2583 } 2584 } 2585 } 2586 2587 static void hotkey_poll_setup_safe(const bool may_warn) 2588 { 2589 mutex_lock(&hotkey_mutex); 2590 hotkey_poll_setup(may_warn); 2591 mutex_unlock(&hotkey_mutex); 2592 } 2593 2594 /* call with hotkey_mutex held */ 2595 static void hotkey_poll_set_freq(unsigned int freq) 2596 { 2597 if (!freq) 2598 hotkey_poll_stop_sync(); 2599 2600 hotkey_poll_freq = freq; 2601 } 2602 2603 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2604 2605 static void hotkey_poll_setup(const bool __unused) 2606 { 2607 } 2608 2609 static void hotkey_poll_setup_safe(const bool __unused) 2610 { 2611 } 2612 2613 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2614 2615 static int hotkey_inputdev_open(struct input_dev *dev) 2616 { 2617 switch (tpacpi_lifecycle) { 2618 case TPACPI_LIFE_INIT: 2619 case TPACPI_LIFE_RUNNING: 2620 hotkey_poll_setup_safe(false); 2621 return 0; 2622 case TPACPI_LIFE_EXITING: 2623 return -EBUSY; 2624 } 2625 2626 /* Should only happen if tpacpi_lifecycle is corrupt */ 2627 BUG(); 2628 return -EBUSY; 2629 } 2630 2631 static void hotkey_inputdev_close(struct input_dev *dev) 2632 { 2633 /* disable hotkey polling when possible */ 2634 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2635 !(hotkey_source_mask & hotkey_driver_mask)) 2636 hotkey_poll_setup_safe(false); 2637 } 2638 2639 /* sysfs hotkey enable ------------------------------------------------- */ 2640 static ssize_t hotkey_enable_show(struct device *dev, 2641 struct device_attribute *attr, 2642 char *buf) 2643 { 2644 int res, status; 2645 2646 printk_deprecated_attribute("hotkey_enable", 2647 "Hotkey reporting is always enabled"); 2648 2649 res = hotkey_status_get(&status); 2650 if (res) 2651 return res; 2652 2653 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2654 } 2655 2656 static ssize_t hotkey_enable_store(struct device *dev, 2657 struct device_attribute *attr, 2658 const char *buf, size_t count) 2659 { 2660 unsigned long t; 2661 2662 printk_deprecated_attribute("hotkey_enable", 2663 "Hotkeys can be disabled through hotkey_mask"); 2664 2665 if (parse_strtoul(buf, 1, &t)) 2666 return -EINVAL; 2667 2668 if (t == 0) 2669 return -EPERM; 2670 2671 return count; 2672 } 2673 2674 static DEVICE_ATTR_RW(hotkey_enable); 2675 2676 /* sysfs hotkey mask --------------------------------------------------- */ 2677 static ssize_t hotkey_mask_show(struct device *dev, 2678 struct device_attribute *attr, 2679 char *buf) 2680 { 2681 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2682 } 2683 2684 static ssize_t hotkey_mask_store(struct device *dev, 2685 struct device_attribute *attr, 2686 const char *buf, size_t count) 2687 { 2688 unsigned long t; 2689 int res; 2690 2691 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2692 return -EINVAL; 2693 2694 if (mutex_lock_killable(&hotkey_mutex)) 2695 return -ERESTARTSYS; 2696 2697 res = hotkey_user_mask_set(t); 2698 2699 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2700 hotkey_poll_setup(true); 2701 #endif 2702 2703 mutex_unlock(&hotkey_mutex); 2704 2705 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2706 2707 return (res) ? res : count; 2708 } 2709 2710 static DEVICE_ATTR_RW(hotkey_mask); 2711 2712 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2713 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2714 struct device_attribute *attr, 2715 char *buf) 2716 { 2717 return sprintf(buf, "0\n"); 2718 } 2719 2720 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2721 2722 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2723 static ssize_t hotkey_bios_mask_show(struct device *dev, 2724 struct device_attribute *attr, 2725 char *buf) 2726 { 2727 printk_deprecated_attribute("hotkey_bios_mask", 2728 "This attribute is useless."); 2729 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2730 } 2731 2732 static DEVICE_ATTR_RO(hotkey_bios_mask); 2733 2734 /* sysfs hotkey all_mask ----------------------------------------------- */ 2735 static ssize_t hotkey_all_mask_show(struct device *dev, 2736 struct device_attribute *attr, 2737 char *buf) 2738 { 2739 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2740 hotkey_all_mask | hotkey_source_mask); 2741 } 2742 2743 static DEVICE_ATTR_RO(hotkey_all_mask); 2744 2745 /* sysfs hotkey recommended_mask --------------------------------------- */ 2746 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2747 struct device_attribute *attr, 2748 char *buf) 2749 { 2750 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2751 (hotkey_all_mask | hotkey_source_mask) 2752 & ~hotkey_reserved_mask); 2753 } 2754 2755 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2756 2757 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2758 2759 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2760 static ssize_t hotkey_source_mask_show(struct device *dev, 2761 struct device_attribute *attr, 2762 char *buf) 2763 { 2764 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2765 } 2766 2767 static ssize_t hotkey_source_mask_store(struct device *dev, 2768 struct device_attribute *attr, 2769 const char *buf, size_t count) 2770 { 2771 unsigned long t; 2772 u32 r_ev; 2773 int rc; 2774 2775 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2776 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2777 return -EINVAL; 2778 2779 if (mutex_lock_killable(&hotkey_mutex)) 2780 return -ERESTARTSYS; 2781 2782 HOTKEY_CONFIG_CRITICAL_START 2783 hotkey_source_mask = t; 2784 HOTKEY_CONFIG_CRITICAL_END 2785 2786 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2787 ~hotkey_source_mask); 2788 hotkey_poll_setup(true); 2789 2790 /* check if events needed by the driver got disabled */ 2791 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2792 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2793 2794 mutex_unlock(&hotkey_mutex); 2795 2796 if (rc < 0) 2797 pr_err("hotkey_source_mask: " 2798 "failed to update the firmware event mask!\n"); 2799 2800 if (r_ev) 2801 pr_notice("hotkey_source_mask: " 2802 "some important events were disabled: 0x%04x\n", 2803 r_ev); 2804 2805 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2806 2807 return (rc < 0) ? rc : count; 2808 } 2809 2810 static DEVICE_ATTR_RW(hotkey_source_mask); 2811 2812 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2813 static ssize_t hotkey_poll_freq_show(struct device *dev, 2814 struct device_attribute *attr, 2815 char *buf) 2816 { 2817 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2818 } 2819 2820 static ssize_t hotkey_poll_freq_store(struct device *dev, 2821 struct device_attribute *attr, 2822 const char *buf, size_t count) 2823 { 2824 unsigned long t; 2825 2826 if (parse_strtoul(buf, 25, &t)) 2827 return -EINVAL; 2828 2829 if (mutex_lock_killable(&hotkey_mutex)) 2830 return -ERESTARTSYS; 2831 2832 hotkey_poll_set_freq(t); 2833 hotkey_poll_setup(true); 2834 2835 mutex_unlock(&hotkey_mutex); 2836 2837 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2838 2839 return count; 2840 } 2841 2842 static DEVICE_ATTR_RW(hotkey_poll_freq); 2843 2844 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2845 2846 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2847 static ssize_t hotkey_radio_sw_show(struct device *dev, 2848 struct device_attribute *attr, 2849 char *buf) 2850 { 2851 int res; 2852 res = hotkey_get_wlsw(); 2853 if (res < 0) 2854 return res; 2855 2856 /* Opportunistic update */ 2857 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2858 2859 return snprintf(buf, PAGE_SIZE, "%d\n", 2860 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2861 } 2862 2863 static DEVICE_ATTR_RO(hotkey_radio_sw); 2864 2865 static void hotkey_radio_sw_notify_change(void) 2866 { 2867 if (tp_features.hotkey_wlsw) 2868 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2869 "hotkey_radio_sw"); 2870 } 2871 2872 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2873 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2874 struct device_attribute *attr, 2875 char *buf) 2876 { 2877 int res, s; 2878 res = hotkey_get_tablet_mode(&s); 2879 if (res < 0) 2880 return res; 2881 2882 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2883 } 2884 2885 static DEVICE_ATTR_RO(hotkey_tablet_mode); 2886 2887 static void hotkey_tablet_mode_notify_change(void) 2888 { 2889 if (tp_features.hotkey_tablet) 2890 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2891 "hotkey_tablet_mode"); 2892 } 2893 2894 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2895 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2896 struct device_attribute *attr, 2897 char *buf) 2898 { 2899 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2900 } 2901 2902 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2903 2904 static void hotkey_wakeup_reason_notify_change(void) 2905 { 2906 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2907 "wakeup_reason"); 2908 } 2909 2910 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2911 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2912 struct device_attribute *attr, 2913 char *buf) 2914 { 2915 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2916 } 2917 2918 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 2919 hotkey_wakeup_hotunplug_complete_show, NULL); 2920 2921 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2922 { 2923 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2924 "wakeup_hotunplug_complete"); 2925 } 2926 2927 /* sysfs adaptive kbd mode --------------------------------------------- */ 2928 2929 static int adaptive_keyboard_get_mode(void); 2930 static int adaptive_keyboard_set_mode(int new_mode); 2931 2932 enum ADAPTIVE_KEY_MODE { 2933 HOME_MODE, 2934 WEB_BROWSER_MODE, 2935 WEB_CONFERENCE_MODE, 2936 FUNCTION_MODE, 2937 LAYFLAT_MODE 2938 }; 2939 2940 static ssize_t adaptive_kbd_mode_show(struct device *dev, 2941 struct device_attribute *attr, 2942 char *buf) 2943 { 2944 int current_mode; 2945 2946 current_mode = adaptive_keyboard_get_mode(); 2947 if (current_mode < 0) 2948 return current_mode; 2949 2950 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 2951 } 2952 2953 static ssize_t adaptive_kbd_mode_store(struct device *dev, 2954 struct device_attribute *attr, 2955 const char *buf, size_t count) 2956 { 2957 unsigned long t; 2958 int res; 2959 2960 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 2961 return -EINVAL; 2962 2963 res = adaptive_keyboard_set_mode(t); 2964 return (res < 0) ? res : count; 2965 } 2966 2967 static DEVICE_ATTR_RW(adaptive_kbd_mode); 2968 2969 static struct attribute *adaptive_kbd_attributes[] = { 2970 &dev_attr_adaptive_kbd_mode.attr, 2971 NULL 2972 }; 2973 2974 static const struct attribute_group adaptive_kbd_attr_group = { 2975 .attrs = adaptive_kbd_attributes, 2976 }; 2977 2978 /* --------------------------------------------------------------------- */ 2979 2980 static struct attribute *hotkey_attributes[] __initdata = { 2981 &dev_attr_hotkey_enable.attr, 2982 &dev_attr_hotkey_bios_enabled.attr, 2983 &dev_attr_hotkey_bios_mask.attr, 2984 &dev_attr_wakeup_reason.attr, 2985 &dev_attr_wakeup_hotunplug_complete.attr, 2986 &dev_attr_hotkey_mask.attr, 2987 &dev_attr_hotkey_all_mask.attr, 2988 &dev_attr_hotkey_recommended_mask.attr, 2989 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2990 &dev_attr_hotkey_source_mask.attr, 2991 &dev_attr_hotkey_poll_freq.attr, 2992 #endif 2993 }; 2994 2995 /* 2996 * Sync both the hw and sw blocking state of all switches 2997 */ 2998 static void tpacpi_send_radiosw_update(void) 2999 { 3000 int wlsw; 3001 3002 /* 3003 * We must sync all rfkill controllers *before* issuing any 3004 * rfkill input events, or we will race the rfkill core input 3005 * handler. 3006 * 3007 * tpacpi_inputdev_send_mutex works as a synchronization point 3008 * for the above. 3009 * 3010 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3011 */ 3012 3013 wlsw = hotkey_get_wlsw(); 3014 3015 /* Sync hw blocking state first if it is hw-blocked */ 3016 if (wlsw == TPACPI_RFK_RADIO_OFF) 3017 tpacpi_rfk_update_hwblock_state(true); 3018 3019 /* Sync sw blocking state */ 3020 tpacpi_rfk_update_swstate_all(); 3021 3022 /* Sync hw blocking state last if it is hw-unblocked */ 3023 if (wlsw == TPACPI_RFK_RADIO_ON) 3024 tpacpi_rfk_update_hwblock_state(false); 3025 3026 /* Issue rfkill input event for WLSW switch */ 3027 if (!(wlsw < 0)) { 3028 mutex_lock(&tpacpi_inputdev_send_mutex); 3029 3030 input_report_switch(tpacpi_inputdev, 3031 SW_RFKILL_ALL, (wlsw > 0)); 3032 input_sync(tpacpi_inputdev); 3033 3034 mutex_unlock(&tpacpi_inputdev_send_mutex); 3035 } 3036 3037 /* 3038 * this can be unconditional, as we will poll state again 3039 * if userspace uses the notify to read data 3040 */ 3041 hotkey_radio_sw_notify_change(); 3042 } 3043 3044 static void hotkey_exit(void) 3045 { 3046 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3047 mutex_lock(&hotkey_mutex); 3048 hotkey_poll_stop_sync(); 3049 mutex_unlock(&hotkey_mutex); 3050 #endif 3051 3052 if (hotkey_dev_attributes) 3053 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3054 3055 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3056 "restoring original HKEY status and mask\n"); 3057 /* yes, there is a bitwise or below, we want the 3058 * functions to be called even if one of them fail */ 3059 if (((tp_features.hotkey_mask && 3060 hotkey_mask_set(hotkey_orig_mask)) | 3061 hotkey_status_set(false)) != 0) 3062 pr_err("failed to restore hot key mask " 3063 "to BIOS defaults\n"); 3064 } 3065 3066 static void __init hotkey_unmap(const unsigned int scancode) 3067 { 3068 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3069 clear_bit(hotkey_keycode_map[scancode], 3070 tpacpi_inputdev->keybit); 3071 hotkey_keycode_map[scancode] = KEY_RESERVED; 3072 } 3073 } 3074 3075 /* 3076 * HKEY quirks: 3077 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3078 */ 3079 3080 #define TPACPI_HK_Q_INIMASK 0x0001 3081 3082 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3083 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3084 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3085 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3086 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3087 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3088 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3089 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3090 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3091 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3092 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3093 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3094 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3095 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3096 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3097 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3098 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3099 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3100 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3101 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3102 }; 3103 3104 typedef u16 tpacpi_keymap_entry_t; 3105 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3106 3107 static int __init hotkey_init(struct ibm_init_struct *iibm) 3108 { 3109 /* Requirements for changing the default keymaps: 3110 * 3111 * 1. Many of the keys are mapped to KEY_RESERVED for very 3112 * good reasons. Do not change them unless you have deep 3113 * knowledge on the IBM and Lenovo ThinkPad firmware for 3114 * the various ThinkPad models. The driver behaves 3115 * differently for KEY_RESERVED: such keys have their 3116 * hot key mask *unset* in mask_recommended, and also 3117 * in the initial hot key mask programmed into the 3118 * firmware at driver load time, which means the firm- 3119 * ware may react very differently if you change them to 3120 * something else; 3121 * 3122 * 2. You must be subscribed to the linux-thinkpad and 3123 * ibm-acpi-devel mailing lists, and you should read the 3124 * list archives since 2007 if you want to change the 3125 * keymaps. This requirement exists so that you will 3126 * know the past history of problems with the thinkpad- 3127 * acpi driver keymaps, and also that you will be 3128 * listening to any bug reports; 3129 * 3130 * 3. Do not send thinkpad-acpi specific patches directly to 3131 * for merging, *ever*. Send them to the linux-acpi 3132 * mailinglist for comments. Merging is to be done only 3133 * through acpi-test and the ACPI maintainer. 3134 * 3135 * If the above is too much to ask, don't change the keymap. 3136 * Ask the thinkpad-acpi maintainer to do it, instead. 3137 */ 3138 3139 enum keymap_index { 3140 TPACPI_KEYMAP_IBM_GENERIC = 0, 3141 TPACPI_KEYMAP_LENOVO_GENERIC, 3142 }; 3143 3144 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3145 /* Generic keymap for IBM ThinkPads */ 3146 [TPACPI_KEYMAP_IBM_GENERIC] = { 3147 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3148 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3149 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3150 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3151 3152 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3153 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3154 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3155 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3156 3157 /* brightness: firmware always reacts to them */ 3158 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3159 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3160 3161 /* Thinklight: firmware always react to it */ 3162 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3163 3164 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3165 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3166 3167 /* Volume: firmware always react to it and reprograms 3168 * the built-in *extra* mixer. Never map it to control 3169 * another mixer by default. */ 3170 KEY_RESERVED, /* 0x14: VOLUME UP */ 3171 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3172 KEY_RESERVED, /* 0x16: MUTE */ 3173 3174 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3175 3176 /* (assignments unknown, please report if found) */ 3177 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3178 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3179 3180 /* No assignments, only used for Adaptive keyboards. */ 3181 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3182 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3183 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3184 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3185 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3186 }, 3187 3188 /* Generic keymap for Lenovo ThinkPads */ 3189 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3190 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3191 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3192 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3193 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3194 3195 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3196 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3197 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3198 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3199 3200 /* These should be enabled --only-- when ACPI video 3201 * is disabled (i.e. in "vendor" mode), and are handled 3202 * in a special way by the init code */ 3203 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3204 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3205 3206 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3207 3208 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3209 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3210 3211 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3212 * react to it and reprograms the built-in *extra* mixer. 3213 * Never map it to control another mixer by default. 3214 * 3215 * T60?, T61, R60?, R61: firmware and EC tries to send 3216 * these over the regular keyboard, so these are no-ops, 3217 * but there are still weird bugs re. MUTE, so do not 3218 * change unless you get test reports from all Lenovo 3219 * models. May cause the BIOS to interfere with the 3220 * HDA mixer. 3221 */ 3222 KEY_RESERVED, /* 0x14: VOLUME UP */ 3223 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3224 KEY_RESERVED, /* 0x16: MUTE */ 3225 3226 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3227 3228 /* (assignments unknown, please report if found) */ 3229 KEY_UNKNOWN, KEY_UNKNOWN, 3230 3231 /* 3232 * The mic mute button only sends 0x1a. It does not 3233 * automatically mute the mic or change the mute light. 3234 */ 3235 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3236 3237 /* (assignments unknown, please report if found) */ 3238 KEY_UNKNOWN, 3239 3240 /* Extra keys in use since the X240 / T440 / T540 */ 3241 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3242 3243 /* 3244 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3245 * The first item in this list is the Mute button which is 3246 * emitted with 0x103 through 3247 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3248 * symbol is held. 3249 * We'll need to offset those by 0x20. 3250 */ 3251 KEY_RESERVED, /* Mute held, 0x103 */ 3252 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3253 KEY_RESERVED, /* Clipping tool */ 3254 KEY_RESERVED, /* Cloud */ 3255 KEY_RESERVED, 3256 KEY_VOICECOMMAND, /* Voice */ 3257 KEY_RESERVED, 3258 KEY_RESERVED, /* Gestures */ 3259 KEY_RESERVED, 3260 KEY_RESERVED, 3261 KEY_RESERVED, 3262 KEY_CONFIG, /* Settings */ 3263 KEY_RESERVED, /* New tab */ 3264 KEY_REFRESH, /* Reload */ 3265 KEY_BACK, /* Back */ 3266 KEY_RESERVED, /* Microphone down */ 3267 KEY_RESERVED, /* Microphone up */ 3268 KEY_RESERVED, /* Microphone cancellation */ 3269 KEY_RESERVED, /* Camera mode */ 3270 KEY_RESERVED, /* Rotate display, 0x116 */ 3271 }, 3272 }; 3273 3274 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3275 /* Generic maps (fallback) */ 3276 { 3277 .vendor = PCI_VENDOR_ID_IBM, 3278 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3279 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3280 }, 3281 { 3282 .vendor = PCI_VENDOR_ID_LENOVO, 3283 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3284 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3285 }, 3286 }; 3287 3288 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3289 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3290 3291 int res, i; 3292 int status; 3293 int hkeyv; 3294 bool radiosw_state = false; 3295 bool tabletsw_state = false; 3296 3297 unsigned long quirks; 3298 unsigned long keymap_id; 3299 3300 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3301 "initializing hotkey subdriver\n"); 3302 3303 BUG_ON(!tpacpi_inputdev); 3304 BUG_ON(tpacpi_inputdev->open != NULL || 3305 tpacpi_inputdev->close != NULL); 3306 3307 TPACPI_ACPIHANDLE_INIT(hkey); 3308 mutex_init(&hotkey_mutex); 3309 3310 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3311 mutex_init(&hotkey_thread_data_mutex); 3312 #endif 3313 3314 /* hotkey not supported on 570 */ 3315 tp_features.hotkey = hkey_handle != NULL; 3316 3317 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3318 "hotkeys are %s\n", 3319 str_supported(tp_features.hotkey)); 3320 3321 if (!tp_features.hotkey) 3322 return 1; 3323 3324 /* 3325 * Check if we have an adaptive keyboard, like on the 3326 * Lenovo Carbon X1 2014 (2nd Gen). 3327 */ 3328 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3329 if ((hkeyv >> 8) == 2) { 3330 tp_features.has_adaptive_kbd = true; 3331 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 3332 &adaptive_kbd_attr_group); 3333 if (res) 3334 goto err_exit; 3335 } 3336 } 3337 3338 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3339 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3340 3341 tpacpi_disable_brightness_delay(); 3342 3343 /* MUST have enough space for all attributes to be added to 3344 * hotkey_dev_attributes */ 3345 hotkey_dev_attributes = create_attr_set( 3346 ARRAY_SIZE(hotkey_attributes) + 2, 3347 NULL); 3348 if (!hotkey_dev_attributes) 3349 return -ENOMEM; 3350 res = add_many_to_attr_set(hotkey_dev_attributes, 3351 hotkey_attributes, 3352 ARRAY_SIZE(hotkey_attributes)); 3353 if (res) 3354 goto err_exit; 3355 3356 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3357 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3358 for HKEY interface version 0x100 */ 3359 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3360 if ((hkeyv >> 8) != 1) { 3361 pr_err("unknown version of the HKEY interface: 0x%x\n", 3362 hkeyv); 3363 pr_err("please report this to %s\n", TPACPI_MAIL); 3364 } else { 3365 /* 3366 * MHKV 0x100 in A31, R40, R40e, 3367 * T4x, X31, and later 3368 */ 3369 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3370 "firmware HKEY interface version: 0x%x\n", 3371 hkeyv); 3372 3373 /* Paranoia check AND init hotkey_all_mask */ 3374 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3375 "MHKA", "qd")) { 3376 pr_err("missing MHKA handler, " 3377 "please report this to %s\n", 3378 TPACPI_MAIL); 3379 /* Fallback: pre-init for FN+F3,F4,F12 */ 3380 hotkey_all_mask = 0x080cU; 3381 } else { 3382 tp_features.hotkey_mask = 1; 3383 } 3384 } 3385 } 3386 3387 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3388 "hotkey masks are %s\n", 3389 str_supported(tp_features.hotkey_mask)); 3390 3391 /* Init hotkey_all_mask if not initialized yet */ 3392 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3393 (quirks & TPACPI_HK_Q_INIMASK)) 3394 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3395 3396 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3397 if (tp_features.hotkey_mask) { 3398 /* hotkey_source_mask *must* be zero for 3399 * the first hotkey_mask_get to return hotkey_orig_mask */ 3400 res = hotkey_mask_get(); 3401 if (res) 3402 goto err_exit; 3403 3404 hotkey_orig_mask = hotkey_acpi_mask; 3405 } else { 3406 hotkey_orig_mask = hotkey_all_mask; 3407 hotkey_acpi_mask = hotkey_all_mask; 3408 } 3409 3410 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3411 if (dbg_wlswemul) { 3412 tp_features.hotkey_wlsw = 1; 3413 radiosw_state = !!tpacpi_wlsw_emulstate; 3414 pr_info("radio switch emulation enabled\n"); 3415 } else 3416 #endif 3417 /* Not all thinkpads have a hardware radio switch */ 3418 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3419 tp_features.hotkey_wlsw = 1; 3420 radiosw_state = !!status; 3421 pr_info("radio switch found; radios are %s\n", 3422 enabled(status, 0)); 3423 } 3424 if (tp_features.hotkey_wlsw) 3425 res = add_to_attr_set(hotkey_dev_attributes, 3426 &dev_attr_hotkey_radio_sw.attr); 3427 3428 /* For X41t, X60t, X61t Tablets... */ 3429 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3430 tp_features.hotkey_tablet = 1; 3431 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); 3432 pr_info("possible tablet mode switch found; " 3433 "ThinkPad in %s mode\n", 3434 (tabletsw_state) ? "tablet" : "laptop"); 3435 res = add_to_attr_set(hotkey_dev_attributes, 3436 &dev_attr_hotkey_tablet_mode.attr); 3437 } 3438 3439 if (!res) 3440 res = register_attr_set_with_sysfs( 3441 hotkey_dev_attributes, 3442 &tpacpi_pdev->dev.kobj); 3443 if (res) 3444 goto err_exit; 3445 3446 /* Set up key map */ 3447 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3448 GFP_KERNEL); 3449 if (!hotkey_keycode_map) { 3450 pr_err("failed to allocate memory for key map\n"); 3451 res = -ENOMEM; 3452 goto err_exit; 3453 } 3454 3455 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3456 ARRAY_SIZE(tpacpi_keymap_qtable)); 3457 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3458 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3459 "using keymap number %lu\n", keymap_id); 3460 3461 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3462 TPACPI_HOTKEY_MAP_SIZE); 3463 3464 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3465 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3466 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3467 tpacpi_inputdev->keycode = hotkey_keycode_map; 3468 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3469 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3470 input_set_capability(tpacpi_inputdev, EV_KEY, 3471 hotkey_keycode_map[i]); 3472 } else { 3473 if (i < sizeof(hotkey_reserved_mask)*8) 3474 hotkey_reserved_mask |= 1 << i; 3475 } 3476 } 3477 3478 if (tp_features.hotkey_wlsw) { 3479 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3480 input_report_switch(tpacpi_inputdev, 3481 SW_RFKILL_ALL, radiosw_state); 3482 } 3483 if (tp_features.hotkey_tablet) { 3484 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3485 input_report_switch(tpacpi_inputdev, 3486 SW_TABLET_MODE, tabletsw_state); 3487 } 3488 3489 /* Do not issue duplicate brightness change events to 3490 * userspace. tpacpi_detect_brightness_capabilities() must have 3491 * been called before this point */ 3492 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3493 pr_info("This ThinkPad has standard ACPI backlight " 3494 "brightness control, supported by the ACPI " 3495 "video driver\n"); 3496 pr_notice("Disabling thinkpad-acpi brightness events " 3497 "by default...\n"); 3498 3499 /* Disable brightness up/down on Lenovo thinkpads when 3500 * ACPI is handling them, otherwise it is plain impossible 3501 * for userspace to do something even remotely sane */ 3502 hotkey_reserved_mask |= 3503 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3504 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3505 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3506 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3507 } 3508 3509 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3510 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3511 & ~hotkey_all_mask 3512 & ~hotkey_reserved_mask; 3513 3514 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3515 "hotkey source mask 0x%08x, polling freq %u\n", 3516 hotkey_source_mask, hotkey_poll_freq); 3517 #endif 3518 3519 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3520 "enabling firmware HKEY event interface...\n"); 3521 res = hotkey_status_set(true); 3522 if (res) { 3523 hotkey_exit(); 3524 return res; 3525 } 3526 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3527 | hotkey_driver_mask) 3528 & ~hotkey_source_mask); 3529 if (res < 0 && res != -ENXIO) { 3530 hotkey_exit(); 3531 return res; 3532 } 3533 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3534 & ~hotkey_reserved_mask; 3535 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3536 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3537 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3538 3539 tpacpi_inputdev->open = &hotkey_inputdev_open; 3540 tpacpi_inputdev->close = &hotkey_inputdev_close; 3541 3542 hotkey_poll_setup_safe(true); 3543 3544 return 0; 3545 3546 err_exit: 3547 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3548 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3549 &adaptive_kbd_attr_group); 3550 3551 hotkey_dev_attributes = NULL; 3552 3553 return (res < 0) ? res : 1; 3554 } 3555 3556 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3557 * mode, Web conference mode, Function mode and Lay-flat mode. 3558 * We support Home mode and Function mode currently. 3559 * 3560 * Will consider support rest of modes in future. 3561 * 3562 */ 3563 static const int adaptive_keyboard_modes[] = { 3564 HOME_MODE, 3565 /* WEB_BROWSER_MODE = 2, 3566 WEB_CONFERENCE_MODE = 3, */ 3567 FUNCTION_MODE 3568 }; 3569 3570 #define DFR_CHANGE_ROW 0x101 3571 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3572 #define FIRST_ADAPTIVE_KEY 0x103 3573 #define ADAPTIVE_KEY_OFFSET 0x020 3574 3575 /* press Fn key a while second, it will switch to Function Mode. Then 3576 * release Fn key, previous mode be restored. 3577 */ 3578 static bool adaptive_keyboard_mode_is_saved; 3579 static int adaptive_keyboard_prev_mode; 3580 3581 static int adaptive_keyboard_get_mode(void) 3582 { 3583 int mode = 0; 3584 3585 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3586 pr_err("Cannot read adaptive keyboard mode\n"); 3587 return -EIO; 3588 } 3589 3590 return mode; 3591 } 3592 3593 static int adaptive_keyboard_set_mode(int new_mode) 3594 { 3595 if (new_mode < 0 || 3596 new_mode > LAYFLAT_MODE) 3597 return -EINVAL; 3598 3599 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3600 pr_err("Cannot set adaptive keyboard mode\n"); 3601 return -EIO; 3602 } 3603 3604 return 0; 3605 } 3606 3607 static int adaptive_keyboard_get_next_mode(int mode) 3608 { 3609 size_t i; 3610 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3611 3612 for (i = 0; i <= max_mode; i++) { 3613 if (adaptive_keyboard_modes[i] == mode) 3614 break; 3615 } 3616 3617 if (i >= max_mode) 3618 i = 0; 3619 else 3620 i++; 3621 3622 return adaptive_keyboard_modes[i]; 3623 } 3624 3625 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3626 { 3627 int current_mode = 0; 3628 int new_mode = 0; 3629 int keycode; 3630 3631 switch (scancode) { 3632 case DFR_CHANGE_ROW: 3633 if (adaptive_keyboard_mode_is_saved) { 3634 new_mode = adaptive_keyboard_prev_mode; 3635 adaptive_keyboard_mode_is_saved = false; 3636 } else { 3637 current_mode = adaptive_keyboard_get_mode(); 3638 if (current_mode < 0) 3639 return false; 3640 new_mode = adaptive_keyboard_get_next_mode( 3641 current_mode); 3642 } 3643 3644 if (adaptive_keyboard_set_mode(new_mode) < 0) 3645 return false; 3646 3647 return true; 3648 3649 case DFR_SHOW_QUICKVIEW_ROW: 3650 current_mode = adaptive_keyboard_get_mode(); 3651 if (current_mode < 0) 3652 return false; 3653 3654 adaptive_keyboard_prev_mode = current_mode; 3655 adaptive_keyboard_mode_is_saved = true; 3656 3657 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3658 return false; 3659 return true; 3660 3661 default: 3662 if (scancode < FIRST_ADAPTIVE_KEY || 3663 scancode >= FIRST_ADAPTIVE_KEY + TPACPI_HOTKEY_MAP_LEN - 3664 ADAPTIVE_KEY_OFFSET) { 3665 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3666 scancode); 3667 return false; 3668 } 3669 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + ADAPTIVE_KEY_OFFSET]; 3670 if (keycode != KEY_RESERVED) { 3671 mutex_lock(&tpacpi_inputdev_send_mutex); 3672 3673 input_report_key(tpacpi_inputdev, keycode, 1); 3674 input_sync(tpacpi_inputdev); 3675 3676 input_report_key(tpacpi_inputdev, keycode, 0); 3677 input_sync(tpacpi_inputdev); 3678 3679 mutex_unlock(&tpacpi_inputdev_send_mutex); 3680 } 3681 return true; 3682 } 3683 } 3684 3685 static bool hotkey_notify_hotkey(const u32 hkey, 3686 bool *send_acpi_ev, 3687 bool *ignore_acpi_ev) 3688 { 3689 /* 0x1000-0x1FFF: key presses */ 3690 unsigned int scancode = hkey & 0xfff; 3691 *send_acpi_ev = true; 3692 *ignore_acpi_ev = false; 3693 3694 /* HKEY event 0x1001 is scancode 0x00 */ 3695 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3696 scancode--; 3697 if (!(hotkey_source_mask & (1 << scancode))) { 3698 tpacpi_input_send_key_masked(scancode); 3699 *send_acpi_ev = false; 3700 } else { 3701 *ignore_acpi_ev = true; 3702 } 3703 return true; 3704 } else { 3705 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3706 } 3707 return false; 3708 } 3709 3710 static bool hotkey_notify_wakeup(const u32 hkey, 3711 bool *send_acpi_ev, 3712 bool *ignore_acpi_ev) 3713 { 3714 /* 0x2000-0x2FFF: Wakeup reason */ 3715 *send_acpi_ev = true; 3716 *ignore_acpi_ev = false; 3717 3718 switch (hkey) { 3719 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3720 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3721 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3722 *ignore_acpi_ev = true; 3723 break; 3724 3725 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3726 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3727 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3728 *ignore_acpi_ev = true; 3729 break; 3730 3731 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3732 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3733 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3734 /* how to auto-heal: */ 3735 /* 2313: woke up from S3, go to S4/S5 */ 3736 /* 2413: woke up from S4, go to S5 */ 3737 break; 3738 3739 default: 3740 return false; 3741 } 3742 3743 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3744 pr_info("woke up due to a hot-unplug request...\n"); 3745 hotkey_wakeup_reason_notify_change(); 3746 } 3747 return true; 3748 } 3749 3750 static bool hotkey_notify_dockevent(const u32 hkey, 3751 bool *send_acpi_ev, 3752 bool *ignore_acpi_ev) 3753 { 3754 /* 0x4000-0x4FFF: dock-related events */ 3755 *send_acpi_ev = true; 3756 *ignore_acpi_ev = false; 3757 3758 switch (hkey) { 3759 case TP_HKEY_EV_UNDOCK_ACK: 3760 /* ACPI undock operation completed after wakeup */ 3761 hotkey_autosleep_ack = 1; 3762 pr_info("undocked\n"); 3763 hotkey_wakeup_hotunplug_complete_notify_change(); 3764 return true; 3765 3766 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3767 pr_info("docked into hotplug port replicator\n"); 3768 return true; 3769 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3770 pr_info("undocked from hotplug port replicator\n"); 3771 return true; 3772 3773 default: 3774 return false; 3775 } 3776 } 3777 3778 static bool hotkey_notify_usrevent(const u32 hkey, 3779 bool *send_acpi_ev, 3780 bool *ignore_acpi_ev) 3781 { 3782 /* 0x5000-0x5FFF: human interface helpers */ 3783 *send_acpi_ev = true; 3784 *ignore_acpi_ev = false; 3785 3786 switch (hkey) { 3787 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3788 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3789 return true; 3790 3791 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3792 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3793 tpacpi_input_send_tabletsw(); 3794 hotkey_tablet_mode_notify_change(); 3795 *send_acpi_ev = false; 3796 return true; 3797 3798 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3799 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3800 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3801 /* do not propagate these events */ 3802 *ignore_acpi_ev = true; 3803 return true; 3804 3805 default: 3806 return false; 3807 } 3808 } 3809 3810 static void thermal_dump_all_sensors(void); 3811 3812 static bool hotkey_notify_6xxx(const u32 hkey, 3813 bool *send_acpi_ev, 3814 bool *ignore_acpi_ev) 3815 { 3816 bool known = true; 3817 3818 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 3819 *send_acpi_ev = true; 3820 *ignore_acpi_ev = false; 3821 3822 switch (hkey) { 3823 case TP_HKEY_EV_THM_TABLE_CHANGED: 3824 pr_info("EC reports that Thermal Table has changed\n"); 3825 /* recommended action: do nothing, we don't have 3826 * Lenovo ATM information */ 3827 return true; 3828 case TP_HKEY_EV_ALARM_BAT_HOT: 3829 pr_crit("THERMAL ALARM: battery is too hot!\n"); 3830 /* recommended action: warn user through gui */ 3831 break; 3832 case TP_HKEY_EV_ALARM_BAT_XHOT: 3833 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 3834 /* recommended action: immediate sleep/hibernate */ 3835 break; 3836 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3837 pr_crit("THERMAL ALARM: " 3838 "a sensor reports something is too hot!\n"); 3839 /* recommended action: warn user through gui, that */ 3840 /* some internal component is too hot */ 3841 break; 3842 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3843 pr_alert("THERMAL EMERGENCY: " 3844 "a sensor reports something is extremely hot!\n"); 3845 /* recommended action: immediate sleep/hibernate */ 3846 break; 3847 case TP_HKEY_EV_AC_CHANGED: 3848 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 3849 * AC status changed; can be triggered by plugging or 3850 * unplugging AC adapter, docking or undocking. */ 3851 3852 /* fallthrough */ 3853 3854 case TP_HKEY_EV_KEY_NUMLOCK: 3855 case TP_HKEY_EV_KEY_FN: 3856 case TP_HKEY_EV_KEY_FN_ESC: 3857 /* key press events, we just ignore them as long as the EC 3858 * is still reporting them in the normal keyboard stream */ 3859 *send_acpi_ev = false; 3860 *ignore_acpi_ev = true; 3861 return true; 3862 3863 default: 3864 pr_warn("unknown possible thermal alarm or keyboard event received\n"); 3865 known = false; 3866 } 3867 3868 thermal_dump_all_sensors(); 3869 3870 return known; 3871 } 3872 3873 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3874 { 3875 u32 hkey; 3876 bool send_acpi_ev; 3877 bool ignore_acpi_ev; 3878 bool known_ev; 3879 3880 if (event != 0x80) { 3881 pr_err("unknown HKEY notification event %d\n", event); 3882 /* forward it to userspace, maybe it knows how to handle it */ 3883 acpi_bus_generate_netlink_event( 3884 ibm->acpi->device->pnp.device_class, 3885 dev_name(&ibm->acpi->device->dev), 3886 event, 0); 3887 return; 3888 } 3889 3890 while (1) { 3891 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3892 pr_err("failed to retrieve HKEY event\n"); 3893 return; 3894 } 3895 3896 if (hkey == 0) { 3897 /* queue empty */ 3898 return; 3899 } 3900 3901 send_acpi_ev = true; 3902 ignore_acpi_ev = false; 3903 3904 switch (hkey >> 12) { 3905 case 1: 3906 /* 0x1000-0x1FFF: key presses */ 3907 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3908 &ignore_acpi_ev); 3909 break; 3910 case 2: 3911 /* 0x2000-0x2FFF: Wakeup reason */ 3912 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3913 &ignore_acpi_ev); 3914 break; 3915 case 3: 3916 /* 0x3000-0x3FFF: bay-related wakeups */ 3917 switch (hkey) { 3918 case TP_HKEY_EV_BAYEJ_ACK: 3919 hotkey_autosleep_ack = 1; 3920 pr_info("bay ejected\n"); 3921 hotkey_wakeup_hotunplug_complete_notify_change(); 3922 known_ev = true; 3923 break; 3924 case TP_HKEY_EV_OPTDRV_EJ: 3925 /* FIXME: kick libata if SATA link offline */ 3926 known_ev = true; 3927 break; 3928 default: 3929 known_ev = false; 3930 } 3931 break; 3932 case 4: 3933 /* 0x4000-0x4FFF: dock-related events */ 3934 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 3935 &ignore_acpi_ev); 3936 break; 3937 case 5: 3938 /* 0x5000-0x5FFF: human interface helpers */ 3939 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3940 &ignore_acpi_ev); 3941 break; 3942 case 6: 3943 /* 0x6000-0x6FFF: thermal alarms/notices and 3944 * keyboard events */ 3945 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 3946 &ignore_acpi_ev); 3947 break; 3948 case 7: 3949 /* 0x7000-0x7FFF: misc */ 3950 if (tp_features.hotkey_wlsw && 3951 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3952 tpacpi_send_radiosw_update(); 3953 send_acpi_ev = 0; 3954 known_ev = true; 3955 break; 3956 } 3957 /* fallthrough to default */ 3958 default: 3959 known_ev = false; 3960 } 3961 if (!known_ev) { 3962 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 3963 pr_notice("please report the conditions when this " 3964 "event happened to %s\n", TPACPI_MAIL); 3965 } 3966 3967 /* netlink events */ 3968 if (!ignore_acpi_ev && send_acpi_ev) { 3969 acpi_bus_generate_netlink_event( 3970 ibm->acpi->device->pnp.device_class, 3971 dev_name(&ibm->acpi->device->dev), 3972 event, hkey); 3973 } 3974 } 3975 } 3976 3977 static void hotkey_suspend(void) 3978 { 3979 /* Do these on suspend, we get the events on early resume! */ 3980 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 3981 hotkey_autosleep_ack = 0; 3982 3983 /* save previous mode of adaptive keyboard of X1 Carbon */ 3984 if (tp_features.has_adaptive_kbd) { 3985 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 3986 "GTRW", "dd", 0)) { 3987 pr_err("Cannot read adaptive keyboard mode.\n"); 3988 } 3989 } 3990 } 3991 3992 static void hotkey_resume(void) 3993 { 3994 tpacpi_disable_brightness_delay(); 3995 3996 if (hotkey_status_set(true) < 0 || 3997 hotkey_mask_set(hotkey_acpi_mask) < 0) 3998 pr_err("error while attempting to reset the event " 3999 "firmware interface\n"); 4000 4001 tpacpi_send_radiosw_update(); 4002 hotkey_tablet_mode_notify_change(); 4003 hotkey_wakeup_reason_notify_change(); 4004 hotkey_wakeup_hotunplug_complete_notify_change(); 4005 hotkey_poll_setup_safe(false); 4006 4007 /* restore previous mode of adapive keyboard of X1 Carbon */ 4008 if (tp_features.has_adaptive_kbd) { 4009 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4010 adaptive_keyboard_prev_mode)) { 4011 pr_err("Cannot set adaptive keyboard mode.\n"); 4012 } 4013 } 4014 } 4015 4016 /* procfs -------------------------------------------------------------- */ 4017 static int hotkey_read(struct seq_file *m) 4018 { 4019 int res, status; 4020 4021 if (!tp_features.hotkey) { 4022 seq_printf(m, "status:\t\tnot supported\n"); 4023 return 0; 4024 } 4025 4026 if (mutex_lock_killable(&hotkey_mutex)) 4027 return -ERESTARTSYS; 4028 res = hotkey_status_get(&status); 4029 if (!res) 4030 res = hotkey_mask_get(); 4031 mutex_unlock(&hotkey_mutex); 4032 if (res) 4033 return res; 4034 4035 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4036 if (hotkey_all_mask) { 4037 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4038 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4039 } else { 4040 seq_printf(m, "mask:\t\tnot supported\n"); 4041 seq_printf(m, "commands:\tenable, disable, reset\n"); 4042 } 4043 4044 return 0; 4045 } 4046 4047 static void hotkey_enabledisable_warn(bool enable) 4048 { 4049 tpacpi_log_usertask("procfs hotkey enable/disable"); 4050 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4051 pr_fmt("hotkey enable/disable functionality has been " 4052 "removed from the driver. " 4053 "Hotkeys are always enabled.\n"))) 4054 pr_err("Please remove the hotkey=enable module " 4055 "parameter, it is deprecated. " 4056 "Hotkeys are always enabled.\n"); 4057 } 4058 4059 static int hotkey_write(char *buf) 4060 { 4061 int res; 4062 u32 mask; 4063 char *cmd; 4064 4065 if (!tp_features.hotkey) 4066 return -ENODEV; 4067 4068 if (mutex_lock_killable(&hotkey_mutex)) 4069 return -ERESTARTSYS; 4070 4071 mask = hotkey_user_mask; 4072 4073 res = 0; 4074 while ((cmd = next_cmd(&buf))) { 4075 if (strlencmp(cmd, "enable") == 0) { 4076 hotkey_enabledisable_warn(1); 4077 } else if (strlencmp(cmd, "disable") == 0) { 4078 hotkey_enabledisable_warn(0); 4079 res = -EPERM; 4080 } else if (strlencmp(cmd, "reset") == 0) { 4081 mask = (hotkey_all_mask | hotkey_source_mask) 4082 & ~hotkey_reserved_mask; 4083 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4084 /* mask set */ 4085 } else if (sscanf(cmd, "%x", &mask) == 1) { 4086 /* mask set */ 4087 } else { 4088 res = -EINVAL; 4089 goto errexit; 4090 } 4091 } 4092 4093 if (!res) { 4094 tpacpi_disclose_usertask("procfs hotkey", 4095 "set mask to 0x%08x\n", mask); 4096 res = hotkey_user_mask_set(mask); 4097 } 4098 4099 errexit: 4100 mutex_unlock(&hotkey_mutex); 4101 return res; 4102 } 4103 4104 static const struct acpi_device_id ibm_htk_device_ids[] = { 4105 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4106 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4107 {"", 0}, 4108 }; 4109 4110 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4111 .hid = ibm_htk_device_ids, 4112 .notify = hotkey_notify, 4113 .handle = &hkey_handle, 4114 .type = ACPI_DEVICE_NOTIFY, 4115 }; 4116 4117 static struct ibm_struct hotkey_driver_data = { 4118 .name = "hotkey", 4119 .read = hotkey_read, 4120 .write = hotkey_write, 4121 .exit = hotkey_exit, 4122 .resume = hotkey_resume, 4123 .suspend = hotkey_suspend, 4124 .acpi = &ibm_hotkey_acpidriver, 4125 }; 4126 4127 /************************************************************************* 4128 * Bluetooth subdriver 4129 */ 4130 4131 enum { 4132 /* ACPI GBDC/SBDC bits */ 4133 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4134 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4135 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4136 0 = disable, 1 = enable */ 4137 }; 4138 4139 enum { 4140 /* ACPI \BLTH commands */ 4141 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4142 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4143 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4144 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4145 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4146 }; 4147 4148 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4149 4150 static int bluetooth_get_status(void) 4151 { 4152 int status; 4153 4154 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4155 if (dbg_bluetoothemul) 4156 return (tpacpi_bluetooth_emulstate) ? 4157 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4158 #endif 4159 4160 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4161 return -EIO; 4162 4163 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4164 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4165 } 4166 4167 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4168 { 4169 int status; 4170 4171 vdbg_printk(TPACPI_DBG_RFKILL, 4172 "will attempt to %s bluetooth\n", 4173 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4174 4175 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4176 if (dbg_bluetoothemul) { 4177 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4178 return 0; 4179 } 4180 #endif 4181 4182 if (state == TPACPI_RFK_RADIO_ON) 4183 status = TP_ACPI_BLUETOOTH_RADIOSSW 4184 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4185 else 4186 status = 0; 4187 4188 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4189 return -EIO; 4190 4191 return 0; 4192 } 4193 4194 /* sysfs bluetooth enable ---------------------------------------------- */ 4195 static ssize_t bluetooth_enable_show(struct device *dev, 4196 struct device_attribute *attr, 4197 char *buf) 4198 { 4199 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4200 attr, buf); 4201 } 4202 4203 static ssize_t bluetooth_enable_store(struct device *dev, 4204 struct device_attribute *attr, 4205 const char *buf, size_t count) 4206 { 4207 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4208 attr, buf, count); 4209 } 4210 4211 static DEVICE_ATTR_RW(bluetooth_enable); 4212 4213 /* --------------------------------------------------------------------- */ 4214 4215 static struct attribute *bluetooth_attributes[] = { 4216 &dev_attr_bluetooth_enable.attr, 4217 NULL 4218 }; 4219 4220 static const struct attribute_group bluetooth_attr_group = { 4221 .attrs = bluetooth_attributes, 4222 }; 4223 4224 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4225 .get_status = bluetooth_get_status, 4226 .set_status = bluetooth_set_status, 4227 }; 4228 4229 static void bluetooth_shutdown(void) 4230 { 4231 /* Order firmware to save current state to NVRAM */ 4232 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4233 TP_ACPI_BLTH_SAVE_STATE)) 4234 pr_notice("failed to save bluetooth state to NVRAM\n"); 4235 else 4236 vdbg_printk(TPACPI_DBG_RFKILL, 4237 "bluetooth state saved to NVRAM\n"); 4238 } 4239 4240 static void bluetooth_exit(void) 4241 { 4242 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4243 &bluetooth_attr_group); 4244 4245 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4246 4247 bluetooth_shutdown(); 4248 } 4249 4250 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4251 { 4252 int res; 4253 int status = 0; 4254 4255 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4256 "initializing bluetooth subdriver\n"); 4257 4258 TPACPI_ACPIHANDLE_INIT(hkey); 4259 4260 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4261 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4262 tp_features.bluetooth = hkey_handle && 4263 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4264 4265 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4266 "bluetooth is %s, status 0x%02x\n", 4267 str_supported(tp_features.bluetooth), 4268 status); 4269 4270 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4271 if (dbg_bluetoothemul) { 4272 tp_features.bluetooth = 1; 4273 pr_info("bluetooth switch emulation enabled\n"); 4274 } else 4275 #endif 4276 if (tp_features.bluetooth && 4277 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4278 /* no bluetooth hardware present in system */ 4279 tp_features.bluetooth = 0; 4280 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4281 "bluetooth hardware not installed\n"); 4282 } 4283 4284 if (!tp_features.bluetooth) 4285 return 1; 4286 4287 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4288 &bluetooth_tprfk_ops, 4289 RFKILL_TYPE_BLUETOOTH, 4290 TPACPI_RFK_BLUETOOTH_SW_NAME, 4291 true); 4292 if (res) 4293 return res; 4294 4295 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4296 &bluetooth_attr_group); 4297 if (res) { 4298 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4299 return res; 4300 } 4301 4302 return 0; 4303 } 4304 4305 /* procfs -------------------------------------------------------------- */ 4306 static int bluetooth_read(struct seq_file *m) 4307 { 4308 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4309 } 4310 4311 static int bluetooth_write(char *buf) 4312 { 4313 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4314 } 4315 4316 static struct ibm_struct bluetooth_driver_data = { 4317 .name = "bluetooth", 4318 .read = bluetooth_read, 4319 .write = bluetooth_write, 4320 .exit = bluetooth_exit, 4321 .shutdown = bluetooth_shutdown, 4322 }; 4323 4324 /************************************************************************* 4325 * Wan subdriver 4326 */ 4327 4328 enum { 4329 /* ACPI GWAN/SWAN bits */ 4330 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4331 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4332 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4333 0 = disable, 1 = enable */ 4334 }; 4335 4336 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4337 4338 static int wan_get_status(void) 4339 { 4340 int status; 4341 4342 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4343 if (dbg_wwanemul) 4344 return (tpacpi_wwan_emulstate) ? 4345 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4346 #endif 4347 4348 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4349 return -EIO; 4350 4351 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4352 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4353 } 4354 4355 static int wan_set_status(enum tpacpi_rfkill_state state) 4356 { 4357 int status; 4358 4359 vdbg_printk(TPACPI_DBG_RFKILL, 4360 "will attempt to %s wwan\n", 4361 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4362 4363 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4364 if (dbg_wwanemul) { 4365 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4366 return 0; 4367 } 4368 #endif 4369 4370 if (state == TPACPI_RFK_RADIO_ON) 4371 status = TP_ACPI_WANCARD_RADIOSSW 4372 | TP_ACPI_WANCARD_RESUMECTRL; 4373 else 4374 status = 0; 4375 4376 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4377 return -EIO; 4378 4379 return 0; 4380 } 4381 4382 /* sysfs wan enable ---------------------------------------------------- */ 4383 static ssize_t wan_enable_show(struct device *dev, 4384 struct device_attribute *attr, 4385 char *buf) 4386 { 4387 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4388 attr, buf); 4389 } 4390 4391 static ssize_t wan_enable_store(struct device *dev, 4392 struct device_attribute *attr, 4393 const char *buf, size_t count) 4394 { 4395 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4396 attr, buf, count); 4397 } 4398 4399 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4400 wan_enable_show, wan_enable_store); 4401 4402 /* --------------------------------------------------------------------- */ 4403 4404 static struct attribute *wan_attributes[] = { 4405 &dev_attr_wwan_enable.attr, 4406 NULL 4407 }; 4408 4409 static const struct attribute_group wan_attr_group = { 4410 .attrs = wan_attributes, 4411 }; 4412 4413 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4414 .get_status = wan_get_status, 4415 .set_status = wan_set_status, 4416 }; 4417 4418 static void wan_shutdown(void) 4419 { 4420 /* Order firmware to save current state to NVRAM */ 4421 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4422 TP_ACPI_WGSV_SAVE_STATE)) 4423 pr_notice("failed to save WWAN state to NVRAM\n"); 4424 else 4425 vdbg_printk(TPACPI_DBG_RFKILL, 4426 "WWAN state saved to NVRAM\n"); 4427 } 4428 4429 static void wan_exit(void) 4430 { 4431 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4432 &wan_attr_group); 4433 4434 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4435 4436 wan_shutdown(); 4437 } 4438 4439 static int __init wan_init(struct ibm_init_struct *iibm) 4440 { 4441 int res; 4442 int status = 0; 4443 4444 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4445 "initializing wan subdriver\n"); 4446 4447 TPACPI_ACPIHANDLE_INIT(hkey); 4448 4449 tp_features.wan = hkey_handle && 4450 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4451 4452 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4453 "wan is %s, status 0x%02x\n", 4454 str_supported(tp_features.wan), 4455 status); 4456 4457 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4458 if (dbg_wwanemul) { 4459 tp_features.wan = 1; 4460 pr_info("wwan switch emulation enabled\n"); 4461 } else 4462 #endif 4463 if (tp_features.wan && 4464 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4465 /* no wan hardware present in system */ 4466 tp_features.wan = 0; 4467 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4468 "wan hardware not installed\n"); 4469 } 4470 4471 if (!tp_features.wan) 4472 return 1; 4473 4474 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4475 &wan_tprfk_ops, 4476 RFKILL_TYPE_WWAN, 4477 TPACPI_RFK_WWAN_SW_NAME, 4478 true); 4479 if (res) 4480 return res; 4481 4482 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4483 &wan_attr_group); 4484 4485 if (res) { 4486 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4487 return res; 4488 } 4489 4490 return 0; 4491 } 4492 4493 /* procfs -------------------------------------------------------------- */ 4494 static int wan_read(struct seq_file *m) 4495 { 4496 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4497 } 4498 4499 static int wan_write(char *buf) 4500 { 4501 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4502 } 4503 4504 static struct ibm_struct wan_driver_data = { 4505 .name = "wan", 4506 .read = wan_read, 4507 .write = wan_write, 4508 .exit = wan_exit, 4509 .shutdown = wan_shutdown, 4510 }; 4511 4512 /************************************************************************* 4513 * UWB subdriver 4514 */ 4515 4516 enum { 4517 /* ACPI GUWB/SUWB bits */ 4518 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4519 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4520 }; 4521 4522 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4523 4524 static int uwb_get_status(void) 4525 { 4526 int status; 4527 4528 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4529 if (dbg_uwbemul) 4530 return (tpacpi_uwb_emulstate) ? 4531 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4532 #endif 4533 4534 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4535 return -EIO; 4536 4537 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4538 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4539 } 4540 4541 static int uwb_set_status(enum tpacpi_rfkill_state state) 4542 { 4543 int status; 4544 4545 vdbg_printk(TPACPI_DBG_RFKILL, 4546 "will attempt to %s UWB\n", 4547 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4548 4549 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4550 if (dbg_uwbemul) { 4551 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4552 return 0; 4553 } 4554 #endif 4555 4556 if (state == TPACPI_RFK_RADIO_ON) 4557 status = TP_ACPI_UWB_RADIOSSW; 4558 else 4559 status = 0; 4560 4561 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4562 return -EIO; 4563 4564 return 0; 4565 } 4566 4567 /* --------------------------------------------------------------------- */ 4568 4569 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4570 .get_status = uwb_get_status, 4571 .set_status = uwb_set_status, 4572 }; 4573 4574 static void uwb_exit(void) 4575 { 4576 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4577 } 4578 4579 static int __init uwb_init(struct ibm_init_struct *iibm) 4580 { 4581 int res; 4582 int status = 0; 4583 4584 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4585 "initializing uwb subdriver\n"); 4586 4587 TPACPI_ACPIHANDLE_INIT(hkey); 4588 4589 tp_features.uwb = hkey_handle && 4590 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4591 4592 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4593 "uwb is %s, status 0x%02x\n", 4594 str_supported(tp_features.uwb), 4595 status); 4596 4597 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4598 if (dbg_uwbemul) { 4599 tp_features.uwb = 1; 4600 pr_info("uwb switch emulation enabled\n"); 4601 } else 4602 #endif 4603 if (tp_features.uwb && 4604 !(status & TP_ACPI_UWB_HWPRESENT)) { 4605 /* no uwb hardware present in system */ 4606 tp_features.uwb = 0; 4607 dbg_printk(TPACPI_DBG_INIT, 4608 "uwb hardware not installed\n"); 4609 } 4610 4611 if (!tp_features.uwb) 4612 return 1; 4613 4614 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4615 &uwb_tprfk_ops, 4616 RFKILL_TYPE_UWB, 4617 TPACPI_RFK_UWB_SW_NAME, 4618 false); 4619 return res; 4620 } 4621 4622 static struct ibm_struct uwb_driver_data = { 4623 .name = "uwb", 4624 .exit = uwb_exit, 4625 .flags.experimental = 1, 4626 }; 4627 4628 /************************************************************************* 4629 * Video subdriver 4630 */ 4631 4632 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4633 4634 enum video_access_mode { 4635 TPACPI_VIDEO_NONE = 0, 4636 TPACPI_VIDEO_570, /* 570 */ 4637 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4638 TPACPI_VIDEO_NEW, /* all others */ 4639 }; 4640 4641 enum { /* video status flags, based on VIDEO_570 */ 4642 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4643 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4644 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4645 }; 4646 4647 enum { /* TPACPI_VIDEO_570 constants */ 4648 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4649 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4650 * video_status_flags */ 4651 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4652 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4653 }; 4654 4655 static enum video_access_mode video_supported; 4656 static int video_orig_autosw; 4657 4658 static int video_autosw_get(void); 4659 static int video_autosw_set(int enable); 4660 4661 TPACPI_HANDLE(vid, root, 4662 "\\_SB.PCI.AGP.VGA", /* 570 */ 4663 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4664 "\\_SB.PCI0.VID0", /* 770e */ 4665 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4666 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4667 "\\_SB.PCI0.AGP.VID", /* all others */ 4668 ); /* R30, R31 */ 4669 4670 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4671 4672 static int __init video_init(struct ibm_init_struct *iibm) 4673 { 4674 int ivga; 4675 4676 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4677 4678 TPACPI_ACPIHANDLE_INIT(vid); 4679 if (tpacpi_is_ibm()) 4680 TPACPI_ACPIHANDLE_INIT(vid2); 4681 4682 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4683 /* G41, assume IVGA doesn't change */ 4684 vid_handle = vid2_handle; 4685 4686 if (!vid_handle) 4687 /* video switching not supported on R30, R31 */ 4688 video_supported = TPACPI_VIDEO_NONE; 4689 else if (tpacpi_is_ibm() && 4690 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4691 /* 570 */ 4692 video_supported = TPACPI_VIDEO_570; 4693 else if (tpacpi_is_ibm() && 4694 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4695 /* 600e/x, 770e, 770x */ 4696 video_supported = TPACPI_VIDEO_770; 4697 else 4698 /* all others */ 4699 video_supported = TPACPI_VIDEO_NEW; 4700 4701 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4702 str_supported(video_supported != TPACPI_VIDEO_NONE), 4703 video_supported); 4704 4705 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 4706 } 4707 4708 static void video_exit(void) 4709 { 4710 dbg_printk(TPACPI_DBG_EXIT, 4711 "restoring original video autoswitch mode\n"); 4712 if (video_autosw_set(video_orig_autosw)) 4713 pr_err("error while trying to restore original " 4714 "video autoswitch mode\n"); 4715 } 4716 4717 static int video_outputsw_get(void) 4718 { 4719 int status = 0; 4720 int i; 4721 4722 switch (video_supported) { 4723 case TPACPI_VIDEO_570: 4724 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4725 TP_ACPI_VIDEO_570_PHSCMD)) 4726 return -EIO; 4727 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4728 break; 4729 case TPACPI_VIDEO_770: 4730 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4731 return -EIO; 4732 if (i) 4733 status |= TP_ACPI_VIDEO_S_LCD; 4734 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4735 return -EIO; 4736 if (i) 4737 status |= TP_ACPI_VIDEO_S_CRT; 4738 break; 4739 case TPACPI_VIDEO_NEW: 4740 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4741 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4742 return -EIO; 4743 if (i) 4744 status |= TP_ACPI_VIDEO_S_CRT; 4745 4746 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4747 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4748 return -EIO; 4749 if (i) 4750 status |= TP_ACPI_VIDEO_S_LCD; 4751 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4752 return -EIO; 4753 if (i) 4754 status |= TP_ACPI_VIDEO_S_DVI; 4755 break; 4756 default: 4757 return -ENOSYS; 4758 } 4759 4760 return status; 4761 } 4762 4763 static int video_outputsw_set(int status) 4764 { 4765 int autosw; 4766 int res = 0; 4767 4768 switch (video_supported) { 4769 case TPACPI_VIDEO_570: 4770 res = acpi_evalf(NULL, NULL, 4771 "\\_SB.PHS2", "vdd", 4772 TP_ACPI_VIDEO_570_PHS2CMD, 4773 status | TP_ACPI_VIDEO_570_PHS2SET); 4774 break; 4775 case TPACPI_VIDEO_770: 4776 autosw = video_autosw_get(); 4777 if (autosw < 0) 4778 return autosw; 4779 4780 res = video_autosw_set(1); 4781 if (res) 4782 return res; 4783 res = acpi_evalf(vid_handle, NULL, 4784 "ASWT", "vdd", status * 0x100, 0); 4785 if (!autosw && video_autosw_set(autosw)) { 4786 pr_err("video auto-switch left enabled due to error\n"); 4787 return -EIO; 4788 } 4789 break; 4790 case TPACPI_VIDEO_NEW: 4791 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4792 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4793 break; 4794 default: 4795 return -ENOSYS; 4796 } 4797 4798 return (res) ? 0 : -EIO; 4799 } 4800 4801 static int video_autosw_get(void) 4802 { 4803 int autosw = 0; 4804 4805 switch (video_supported) { 4806 case TPACPI_VIDEO_570: 4807 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4808 return -EIO; 4809 break; 4810 case TPACPI_VIDEO_770: 4811 case TPACPI_VIDEO_NEW: 4812 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4813 return -EIO; 4814 break; 4815 default: 4816 return -ENOSYS; 4817 } 4818 4819 return autosw & 1; 4820 } 4821 4822 static int video_autosw_set(int enable) 4823 { 4824 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 4825 return -EIO; 4826 return 0; 4827 } 4828 4829 static int video_outputsw_cycle(void) 4830 { 4831 int autosw = video_autosw_get(); 4832 int res; 4833 4834 if (autosw < 0) 4835 return autosw; 4836 4837 switch (video_supported) { 4838 case TPACPI_VIDEO_570: 4839 res = video_autosw_set(1); 4840 if (res) 4841 return res; 4842 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4843 break; 4844 case TPACPI_VIDEO_770: 4845 case TPACPI_VIDEO_NEW: 4846 res = video_autosw_set(1); 4847 if (res) 4848 return res; 4849 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4850 break; 4851 default: 4852 return -ENOSYS; 4853 } 4854 if (!autosw && video_autosw_set(autosw)) { 4855 pr_err("video auto-switch left enabled due to error\n"); 4856 return -EIO; 4857 } 4858 4859 return (res) ? 0 : -EIO; 4860 } 4861 4862 static int video_expand_toggle(void) 4863 { 4864 switch (video_supported) { 4865 case TPACPI_VIDEO_570: 4866 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 4867 0 : -EIO; 4868 case TPACPI_VIDEO_770: 4869 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 4870 0 : -EIO; 4871 case TPACPI_VIDEO_NEW: 4872 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 4873 0 : -EIO; 4874 default: 4875 return -ENOSYS; 4876 } 4877 /* not reached */ 4878 } 4879 4880 static int video_read(struct seq_file *m) 4881 { 4882 int status, autosw; 4883 4884 if (video_supported == TPACPI_VIDEO_NONE) { 4885 seq_printf(m, "status:\t\tnot supported\n"); 4886 return 0; 4887 } 4888 4889 /* Even reads can crash X.org, so... */ 4890 if (!capable(CAP_SYS_ADMIN)) 4891 return -EPERM; 4892 4893 status = video_outputsw_get(); 4894 if (status < 0) 4895 return status; 4896 4897 autosw = video_autosw_get(); 4898 if (autosw < 0) 4899 return autosw; 4900 4901 seq_printf(m, "status:\t\tsupported\n"); 4902 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4903 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4904 if (video_supported == TPACPI_VIDEO_NEW) 4905 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 4906 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 4907 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 4908 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 4909 if (video_supported == TPACPI_VIDEO_NEW) 4910 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 4911 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 4912 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 4913 4914 return 0; 4915 } 4916 4917 static int video_write(char *buf) 4918 { 4919 char *cmd; 4920 int enable, disable, status; 4921 int res; 4922 4923 if (video_supported == TPACPI_VIDEO_NONE) 4924 return -ENODEV; 4925 4926 /* Even reads can crash X.org, let alone writes... */ 4927 if (!capable(CAP_SYS_ADMIN)) 4928 return -EPERM; 4929 4930 enable = 0; 4931 disable = 0; 4932 4933 while ((cmd = next_cmd(&buf))) { 4934 if (strlencmp(cmd, "lcd_enable") == 0) { 4935 enable |= TP_ACPI_VIDEO_S_LCD; 4936 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4937 disable |= TP_ACPI_VIDEO_S_LCD; 4938 } else if (strlencmp(cmd, "crt_enable") == 0) { 4939 enable |= TP_ACPI_VIDEO_S_CRT; 4940 } else if (strlencmp(cmd, "crt_disable") == 0) { 4941 disable |= TP_ACPI_VIDEO_S_CRT; 4942 } else if (video_supported == TPACPI_VIDEO_NEW && 4943 strlencmp(cmd, "dvi_enable") == 0) { 4944 enable |= TP_ACPI_VIDEO_S_DVI; 4945 } else if (video_supported == TPACPI_VIDEO_NEW && 4946 strlencmp(cmd, "dvi_disable") == 0) { 4947 disable |= TP_ACPI_VIDEO_S_DVI; 4948 } else if (strlencmp(cmd, "auto_enable") == 0) { 4949 res = video_autosw_set(1); 4950 if (res) 4951 return res; 4952 } else if (strlencmp(cmd, "auto_disable") == 0) { 4953 res = video_autosw_set(0); 4954 if (res) 4955 return res; 4956 } else if (strlencmp(cmd, "video_switch") == 0) { 4957 res = video_outputsw_cycle(); 4958 if (res) 4959 return res; 4960 } else if (strlencmp(cmd, "expand_toggle") == 0) { 4961 res = video_expand_toggle(); 4962 if (res) 4963 return res; 4964 } else 4965 return -EINVAL; 4966 } 4967 4968 if (enable || disable) { 4969 status = video_outputsw_get(); 4970 if (status < 0) 4971 return status; 4972 res = video_outputsw_set((status & ~disable) | enable); 4973 if (res) 4974 return res; 4975 } 4976 4977 return 0; 4978 } 4979 4980 static struct ibm_struct video_driver_data = { 4981 .name = "video", 4982 .read = video_read, 4983 .write = video_write, 4984 .exit = video_exit, 4985 }; 4986 4987 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 4988 4989 /************************************************************************* 4990 * Keyboard backlight subdriver 4991 */ 4992 4993 static int kbdlight_set_level(int level) 4994 { 4995 if (!hkey_handle) 4996 return -ENXIO; 4997 4998 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 4999 return -EIO; 5000 5001 return 0; 5002 } 5003 5004 static int kbdlight_get_level(void) 5005 { 5006 int status = 0; 5007 5008 if (!hkey_handle) 5009 return -ENXIO; 5010 5011 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5012 return -EIO; 5013 5014 if (status < 0) 5015 return status; 5016 5017 return status & 0x3; 5018 } 5019 5020 static bool kbdlight_is_supported(void) 5021 { 5022 int status = 0; 5023 5024 if (!hkey_handle) 5025 return false; 5026 5027 if (!acpi_has_method(hkey_handle, "MLCG")) { 5028 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5029 return false; 5030 } 5031 5032 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5033 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5034 return false; 5035 } 5036 5037 if (status < 0) { 5038 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5039 return false; 5040 } 5041 5042 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5043 /* 5044 * Guessed test for keyboard backlight: 5045 * 5046 * Machines with backlight keyboard return: 5047 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5048 * b110100010010000000XX - ThinkPad x230 5049 * b010100000010000000XX - ThinkPad x240 5050 * b010100000010000000XX - ThinkPad W541 5051 * (XX is current backlight level) 5052 * 5053 * Machines without backlight keyboard return: 5054 * b10100001000000000000 - ThinkPad x230 5055 * b10110001000000000000 - ThinkPad E430 5056 * b00000000000000000000 - ThinkPad E450 5057 * 5058 * Candidate BITs for detection test (XOR): 5059 * b01000000001000000000 5060 * ^ 5061 */ 5062 return status & BIT(9); 5063 } 5064 5065 static void kbdlight_set_worker(struct work_struct *work) 5066 { 5067 struct tpacpi_led_classdev *data = 5068 container_of(work, struct tpacpi_led_classdev, work); 5069 5070 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5071 kbdlight_set_level(data->new_state); 5072 } 5073 5074 static void kbdlight_sysfs_set(struct led_classdev *led_cdev, 5075 enum led_brightness brightness) 5076 { 5077 struct tpacpi_led_classdev *data = 5078 container_of(led_cdev, 5079 struct tpacpi_led_classdev, 5080 led_classdev); 5081 data->new_state = brightness; 5082 queue_work(tpacpi_wq, &data->work); 5083 } 5084 5085 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5086 { 5087 int level; 5088 5089 level = kbdlight_get_level(); 5090 if (level < 0) 5091 return 0; 5092 5093 return level; 5094 } 5095 5096 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5097 .led_classdev = { 5098 .name = "tpacpi::kbd_backlight", 5099 .max_brightness = 2, 5100 .brightness_set = &kbdlight_sysfs_set, 5101 .brightness_get = &kbdlight_sysfs_get, 5102 .flags = LED_CORE_SUSPENDRESUME, 5103 } 5104 }; 5105 5106 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5107 { 5108 int rc; 5109 5110 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5111 5112 TPACPI_ACPIHANDLE_INIT(hkey); 5113 INIT_WORK(&tpacpi_led_kbdlight.work, kbdlight_set_worker); 5114 5115 if (!kbdlight_is_supported()) { 5116 tp_features.kbdlight = 0; 5117 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5118 return 1; 5119 } 5120 5121 tp_features.kbdlight = 1; 5122 5123 rc = led_classdev_register(&tpacpi_pdev->dev, 5124 &tpacpi_led_kbdlight.led_classdev); 5125 if (rc < 0) { 5126 tp_features.kbdlight = 0; 5127 return rc; 5128 } 5129 5130 return 0; 5131 } 5132 5133 static void kbdlight_exit(void) 5134 { 5135 if (tp_features.kbdlight) 5136 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5137 flush_workqueue(tpacpi_wq); 5138 } 5139 5140 static int kbdlight_read(struct seq_file *m) 5141 { 5142 int level; 5143 5144 if (!tp_features.kbdlight) { 5145 seq_printf(m, "status:\t\tnot supported\n"); 5146 } else { 5147 level = kbdlight_get_level(); 5148 if (level < 0) 5149 seq_printf(m, "status:\t\terror %d\n", level); 5150 else 5151 seq_printf(m, "status:\t\t%d\n", level); 5152 seq_printf(m, "commands:\t0, 1, 2\n"); 5153 } 5154 5155 return 0; 5156 } 5157 5158 static int kbdlight_write(char *buf) 5159 { 5160 char *cmd; 5161 int level = -1; 5162 5163 if (!tp_features.kbdlight) 5164 return -ENODEV; 5165 5166 while ((cmd = next_cmd(&buf))) { 5167 if (strlencmp(cmd, "0") == 0) 5168 level = 0; 5169 else if (strlencmp(cmd, "1") == 0) 5170 level = 1; 5171 else if (strlencmp(cmd, "2") == 0) 5172 level = 2; 5173 else 5174 return -EINVAL; 5175 } 5176 5177 if (level == -1) 5178 return -EINVAL; 5179 5180 return kbdlight_set_level(level); 5181 } 5182 5183 static struct ibm_struct kbdlight_driver_data = { 5184 .name = "kbdlight", 5185 .read = kbdlight_read, 5186 .write = kbdlight_write, 5187 .exit = kbdlight_exit, 5188 }; 5189 5190 /************************************************************************* 5191 * Light (thinklight) subdriver 5192 */ 5193 5194 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5195 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5196 5197 static int light_get_status(void) 5198 { 5199 int status = 0; 5200 5201 if (tp_features.light_status) { 5202 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5203 return -EIO; 5204 return (!!status); 5205 } 5206 5207 return -ENXIO; 5208 } 5209 5210 static int light_set_status(int status) 5211 { 5212 int rc; 5213 5214 if (tp_features.light) { 5215 if (cmos_handle) { 5216 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5217 (status) ? 5218 TP_CMOS_THINKLIGHT_ON : 5219 TP_CMOS_THINKLIGHT_OFF); 5220 } else { 5221 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5222 (status) ? 1 : 0); 5223 } 5224 return (rc) ? 0 : -EIO; 5225 } 5226 5227 return -ENXIO; 5228 } 5229 5230 static void light_set_status_worker(struct work_struct *work) 5231 { 5232 struct tpacpi_led_classdev *data = 5233 container_of(work, struct tpacpi_led_classdev, work); 5234 5235 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5236 light_set_status((data->new_state != TPACPI_LED_OFF)); 5237 } 5238 5239 static void light_sysfs_set(struct led_classdev *led_cdev, 5240 enum led_brightness brightness) 5241 { 5242 struct tpacpi_led_classdev *data = 5243 container_of(led_cdev, 5244 struct tpacpi_led_classdev, 5245 led_classdev); 5246 data->new_state = (brightness != LED_OFF) ? 5247 TPACPI_LED_ON : TPACPI_LED_OFF; 5248 queue_work(tpacpi_wq, &data->work); 5249 } 5250 5251 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5252 { 5253 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5254 } 5255 5256 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5257 .led_classdev = { 5258 .name = "tpacpi::thinklight", 5259 .brightness_set = &light_sysfs_set, 5260 .brightness_get = &light_sysfs_get, 5261 } 5262 }; 5263 5264 static int __init light_init(struct ibm_init_struct *iibm) 5265 { 5266 int rc; 5267 5268 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5269 5270 if (tpacpi_is_ibm()) { 5271 TPACPI_ACPIHANDLE_INIT(ledb); 5272 TPACPI_ACPIHANDLE_INIT(lght); 5273 } 5274 TPACPI_ACPIHANDLE_INIT(cmos); 5275 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 5276 5277 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5278 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5279 5280 if (tp_features.light) 5281 /* light status not supported on 5282 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5283 tp_features.light_status = 5284 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5285 5286 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5287 str_supported(tp_features.light), 5288 str_supported(tp_features.light_status)); 5289 5290 if (!tp_features.light) 5291 return 1; 5292 5293 rc = led_classdev_register(&tpacpi_pdev->dev, 5294 &tpacpi_led_thinklight.led_classdev); 5295 5296 if (rc < 0) { 5297 tp_features.light = 0; 5298 tp_features.light_status = 0; 5299 } else { 5300 rc = 0; 5301 } 5302 5303 return rc; 5304 } 5305 5306 static void light_exit(void) 5307 { 5308 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5309 flush_workqueue(tpacpi_wq); 5310 } 5311 5312 static int light_read(struct seq_file *m) 5313 { 5314 int status; 5315 5316 if (!tp_features.light) { 5317 seq_printf(m, "status:\t\tnot supported\n"); 5318 } else if (!tp_features.light_status) { 5319 seq_printf(m, "status:\t\tunknown\n"); 5320 seq_printf(m, "commands:\ton, off\n"); 5321 } else { 5322 status = light_get_status(); 5323 if (status < 0) 5324 return status; 5325 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5326 seq_printf(m, "commands:\ton, off\n"); 5327 } 5328 5329 return 0; 5330 } 5331 5332 static int light_write(char *buf) 5333 { 5334 char *cmd; 5335 int newstatus = 0; 5336 5337 if (!tp_features.light) 5338 return -ENODEV; 5339 5340 while ((cmd = next_cmd(&buf))) { 5341 if (strlencmp(cmd, "on") == 0) { 5342 newstatus = 1; 5343 } else if (strlencmp(cmd, "off") == 0) { 5344 newstatus = 0; 5345 } else 5346 return -EINVAL; 5347 } 5348 5349 return light_set_status(newstatus); 5350 } 5351 5352 static struct ibm_struct light_driver_data = { 5353 .name = "light", 5354 .read = light_read, 5355 .write = light_write, 5356 .exit = light_exit, 5357 }; 5358 5359 /************************************************************************* 5360 * CMOS subdriver 5361 */ 5362 5363 /* sysfs cmos_command -------------------------------------------------- */ 5364 static ssize_t cmos_command_store(struct device *dev, 5365 struct device_attribute *attr, 5366 const char *buf, size_t count) 5367 { 5368 unsigned long cmos_cmd; 5369 int res; 5370 5371 if (parse_strtoul(buf, 21, &cmos_cmd)) 5372 return -EINVAL; 5373 5374 res = issue_thinkpad_cmos_command(cmos_cmd); 5375 return (res) ? res : count; 5376 } 5377 5378 static DEVICE_ATTR_WO(cmos_command); 5379 5380 /* --------------------------------------------------------------------- */ 5381 5382 static int __init cmos_init(struct ibm_init_struct *iibm) 5383 { 5384 int res; 5385 5386 vdbg_printk(TPACPI_DBG_INIT, 5387 "initializing cmos commands subdriver\n"); 5388 5389 TPACPI_ACPIHANDLE_INIT(cmos); 5390 5391 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5392 str_supported(cmos_handle != NULL)); 5393 5394 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5395 if (res) 5396 return res; 5397 5398 return (cmos_handle) ? 0 : 1; 5399 } 5400 5401 static void cmos_exit(void) 5402 { 5403 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5404 } 5405 5406 static int cmos_read(struct seq_file *m) 5407 { 5408 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5409 R30, R31, T20-22, X20-21 */ 5410 if (!cmos_handle) 5411 seq_printf(m, "status:\t\tnot supported\n"); 5412 else { 5413 seq_printf(m, "status:\t\tsupported\n"); 5414 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5415 } 5416 5417 return 0; 5418 } 5419 5420 static int cmos_write(char *buf) 5421 { 5422 char *cmd; 5423 int cmos_cmd, res; 5424 5425 while ((cmd = next_cmd(&buf))) { 5426 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5427 cmos_cmd >= 0 && cmos_cmd <= 21) { 5428 /* cmos_cmd set */ 5429 } else 5430 return -EINVAL; 5431 5432 res = issue_thinkpad_cmos_command(cmos_cmd); 5433 if (res) 5434 return res; 5435 } 5436 5437 return 0; 5438 } 5439 5440 static struct ibm_struct cmos_driver_data = { 5441 .name = "cmos", 5442 .read = cmos_read, 5443 .write = cmos_write, 5444 .exit = cmos_exit, 5445 }; 5446 5447 /************************************************************************* 5448 * LED subdriver 5449 */ 5450 5451 enum led_access_mode { 5452 TPACPI_LED_NONE = 0, 5453 TPACPI_LED_570, /* 570 */ 5454 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5455 TPACPI_LED_NEW, /* all others */ 5456 }; 5457 5458 enum { /* For TPACPI_LED_OLD */ 5459 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5460 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5461 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5462 }; 5463 5464 static enum led_access_mode led_supported; 5465 5466 static acpi_handle led_handle; 5467 5468 #define TPACPI_LED_NUMLEDS 16 5469 static struct tpacpi_led_classdev *tpacpi_leds; 5470 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5471 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5472 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5473 "tpacpi::power", 5474 "tpacpi:orange:batt", 5475 "tpacpi:green:batt", 5476 "tpacpi::dock_active", 5477 "tpacpi::bay_active", 5478 "tpacpi::dock_batt", 5479 "tpacpi::unknown_led", 5480 "tpacpi::standby", 5481 "tpacpi::dock_status1", 5482 "tpacpi::dock_status2", 5483 "tpacpi::unknown_led2", 5484 "tpacpi::unknown_led3", 5485 "tpacpi::thinkvantage", 5486 }; 5487 #define TPACPI_SAFE_LEDS 0x1081U 5488 5489 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5490 { 5491 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5492 return false; 5493 #else 5494 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5495 #endif 5496 } 5497 5498 static int led_get_status(const unsigned int led) 5499 { 5500 int status; 5501 enum led_status_t led_s; 5502 5503 switch (led_supported) { 5504 case TPACPI_LED_570: 5505 if (!acpi_evalf(ec_handle, 5506 &status, "GLED", "dd", 1 << led)) 5507 return -EIO; 5508 led_s = (status == 0) ? 5509 TPACPI_LED_OFF : 5510 ((status == 1) ? 5511 TPACPI_LED_ON : 5512 TPACPI_LED_BLINK); 5513 tpacpi_led_state_cache[led] = led_s; 5514 return led_s; 5515 default: 5516 return -ENXIO; 5517 } 5518 5519 /* not reached */ 5520 } 5521 5522 static int led_set_status(const unsigned int led, 5523 const enum led_status_t ledstatus) 5524 { 5525 /* off, on, blink. Index is led_status_t */ 5526 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5527 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5528 5529 int rc = 0; 5530 5531 switch (led_supported) { 5532 case TPACPI_LED_570: 5533 /* 570 */ 5534 if (unlikely(led > 7)) 5535 return -EINVAL; 5536 if (unlikely(tpacpi_is_led_restricted(led))) 5537 return -EPERM; 5538 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5539 (1 << led), led_sled_arg1[ledstatus])) 5540 rc = -EIO; 5541 break; 5542 case TPACPI_LED_OLD: 5543 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5544 if (unlikely(led > 7)) 5545 return -EINVAL; 5546 if (unlikely(tpacpi_is_led_restricted(led))) 5547 return -EPERM; 5548 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5549 if (rc >= 0) 5550 rc = ec_write(TPACPI_LED_EC_HLBL, 5551 (ledstatus == TPACPI_LED_BLINK) << led); 5552 if (rc >= 0) 5553 rc = ec_write(TPACPI_LED_EC_HLCL, 5554 (ledstatus != TPACPI_LED_OFF) << led); 5555 break; 5556 case TPACPI_LED_NEW: 5557 /* all others */ 5558 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5559 return -EINVAL; 5560 if (unlikely(tpacpi_is_led_restricted(led))) 5561 return -EPERM; 5562 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5563 led, led_led_arg1[ledstatus])) 5564 rc = -EIO; 5565 break; 5566 default: 5567 rc = -ENXIO; 5568 } 5569 5570 if (!rc) 5571 tpacpi_led_state_cache[led] = ledstatus; 5572 5573 return rc; 5574 } 5575 5576 static void led_set_status_worker(struct work_struct *work) 5577 { 5578 struct tpacpi_led_classdev *data = 5579 container_of(work, struct tpacpi_led_classdev, work); 5580 5581 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5582 led_set_status(data->led, data->new_state); 5583 } 5584 5585 static void led_sysfs_set(struct led_classdev *led_cdev, 5586 enum led_brightness brightness) 5587 { 5588 struct tpacpi_led_classdev *data = container_of(led_cdev, 5589 struct tpacpi_led_classdev, led_classdev); 5590 5591 if (brightness == LED_OFF) 5592 data->new_state = TPACPI_LED_OFF; 5593 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5594 data->new_state = TPACPI_LED_ON; 5595 else 5596 data->new_state = TPACPI_LED_BLINK; 5597 5598 queue_work(tpacpi_wq, &data->work); 5599 } 5600 5601 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5602 unsigned long *delay_on, unsigned long *delay_off) 5603 { 5604 struct tpacpi_led_classdev *data = container_of(led_cdev, 5605 struct tpacpi_led_classdev, led_classdev); 5606 5607 /* Can we choose the flash rate? */ 5608 if (*delay_on == 0 && *delay_off == 0) { 5609 /* yes. set them to the hardware blink rate (1 Hz) */ 5610 *delay_on = 500; /* ms */ 5611 *delay_off = 500; /* ms */ 5612 } else if ((*delay_on != 500) || (*delay_off != 500)) 5613 return -EINVAL; 5614 5615 data->new_state = TPACPI_LED_BLINK; 5616 queue_work(tpacpi_wq, &data->work); 5617 5618 return 0; 5619 } 5620 5621 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5622 { 5623 int rc; 5624 5625 struct tpacpi_led_classdev *data = container_of(led_cdev, 5626 struct tpacpi_led_classdev, led_classdev); 5627 5628 rc = led_get_status(data->led); 5629 5630 if (rc == TPACPI_LED_OFF || rc < 0) 5631 rc = LED_OFF; /* no error handling in led class :( */ 5632 else 5633 rc = LED_FULL; 5634 5635 return rc; 5636 } 5637 5638 static void led_exit(void) 5639 { 5640 unsigned int i; 5641 5642 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5643 if (tpacpi_leds[i].led_classdev.name) 5644 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5645 } 5646 5647 flush_workqueue(tpacpi_wq); 5648 kfree(tpacpi_leds); 5649 } 5650 5651 static int __init tpacpi_init_led(unsigned int led) 5652 { 5653 int rc; 5654 5655 tpacpi_leds[led].led = led; 5656 5657 /* LEDs with no name don't get registered */ 5658 if (!tpacpi_led_names[led]) 5659 return 0; 5660 5661 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5662 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5663 if (led_supported == TPACPI_LED_570) 5664 tpacpi_leds[led].led_classdev.brightness_get = 5665 &led_sysfs_get; 5666 5667 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5668 5669 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5670 5671 rc = led_classdev_register(&tpacpi_pdev->dev, 5672 &tpacpi_leds[led].led_classdev); 5673 if (rc < 0) 5674 tpacpi_leds[led].led_classdev.name = NULL; 5675 5676 return rc; 5677 } 5678 5679 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5680 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5681 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5682 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5683 5684 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5685 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5686 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5687 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5688 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5689 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5690 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5691 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5692 5693 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5694 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5695 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5696 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5697 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5698 5699 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5700 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5701 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5702 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5703 5704 /* (1) - may have excess leds enabled on MSB */ 5705 5706 /* Defaults (order matters, keep last, don't reorder!) */ 5707 { /* Lenovo */ 5708 .vendor = PCI_VENDOR_ID_LENOVO, 5709 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5710 .quirks = 0x1fffU, 5711 }, 5712 { /* IBM ThinkPads with no EC version string */ 5713 .vendor = PCI_VENDOR_ID_IBM, 5714 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5715 .quirks = 0x00ffU, 5716 }, 5717 { /* IBM ThinkPads with EC version string */ 5718 .vendor = PCI_VENDOR_ID_IBM, 5719 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5720 .quirks = 0x00bfU, 5721 }, 5722 }; 5723 5724 #undef TPACPI_LEDQ_IBM 5725 #undef TPACPI_LEDQ_LNV 5726 5727 static enum led_access_mode __init led_init_detect_mode(void) 5728 { 5729 acpi_status status; 5730 5731 if (tpacpi_is_ibm()) { 5732 /* 570 */ 5733 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5734 if (ACPI_SUCCESS(status)) 5735 return TPACPI_LED_570; 5736 5737 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5738 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5739 if (ACPI_SUCCESS(status)) 5740 return TPACPI_LED_OLD; 5741 } 5742 5743 /* most others */ 5744 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5745 if (ACPI_SUCCESS(status)) 5746 return TPACPI_LED_NEW; 5747 5748 /* R30, R31, and unknown firmwares */ 5749 led_handle = NULL; 5750 return TPACPI_LED_NONE; 5751 } 5752 5753 static int __init led_init(struct ibm_init_struct *iibm) 5754 { 5755 unsigned int i; 5756 int rc; 5757 unsigned long useful_leds; 5758 5759 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5760 5761 led_supported = led_init_detect_mode(); 5762 5763 if (led_supported != TPACPI_LED_NONE) { 5764 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5765 ARRAY_SIZE(led_useful_qtable)); 5766 5767 if (!useful_leds) { 5768 led_handle = NULL; 5769 led_supported = TPACPI_LED_NONE; 5770 } 5771 } 5772 5773 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5774 str_supported(led_supported), led_supported); 5775 5776 if (led_supported == TPACPI_LED_NONE) 5777 return 1; 5778 5779 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5780 GFP_KERNEL); 5781 if (!tpacpi_leds) { 5782 pr_err("Out of memory for LED data\n"); 5783 return -ENOMEM; 5784 } 5785 5786 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5787 tpacpi_leds[i].led = -1; 5788 5789 if (!tpacpi_is_led_restricted(i) && 5790 test_bit(i, &useful_leds)) { 5791 rc = tpacpi_init_led(i); 5792 if (rc < 0) { 5793 led_exit(); 5794 return rc; 5795 } 5796 } 5797 } 5798 5799 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5800 pr_notice("warning: userspace override of important " 5801 "firmware LEDs is enabled\n"); 5802 #endif 5803 return 0; 5804 } 5805 5806 #define str_led_status(s) \ 5807 ((s) == TPACPI_LED_OFF ? "off" : \ 5808 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5809 5810 static int led_read(struct seq_file *m) 5811 { 5812 if (!led_supported) { 5813 seq_printf(m, "status:\t\tnot supported\n"); 5814 return 0; 5815 } 5816 seq_printf(m, "status:\t\tsupported\n"); 5817 5818 if (led_supported == TPACPI_LED_570) { 5819 /* 570 */ 5820 int i, status; 5821 for (i = 0; i < 8; i++) { 5822 status = led_get_status(i); 5823 if (status < 0) 5824 return -EIO; 5825 seq_printf(m, "%d:\t\t%s\n", 5826 i, str_led_status(status)); 5827 } 5828 } 5829 5830 seq_printf(m, "commands:\t" 5831 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5832 5833 return 0; 5834 } 5835 5836 static int led_write(char *buf) 5837 { 5838 char *cmd; 5839 int led, rc; 5840 enum led_status_t s; 5841 5842 if (!led_supported) 5843 return -ENODEV; 5844 5845 while ((cmd = next_cmd(&buf))) { 5846 if (sscanf(cmd, "%d", &led) != 1) 5847 return -EINVAL; 5848 5849 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 5850 tpacpi_leds[led].led < 0) 5851 return -ENODEV; 5852 5853 if (strstr(cmd, "off")) { 5854 s = TPACPI_LED_OFF; 5855 } else if (strstr(cmd, "on")) { 5856 s = TPACPI_LED_ON; 5857 } else if (strstr(cmd, "blink")) { 5858 s = TPACPI_LED_BLINK; 5859 } else { 5860 return -EINVAL; 5861 } 5862 5863 rc = led_set_status(led, s); 5864 if (rc < 0) 5865 return rc; 5866 } 5867 5868 return 0; 5869 } 5870 5871 static struct ibm_struct led_driver_data = { 5872 .name = "led", 5873 .read = led_read, 5874 .write = led_write, 5875 .exit = led_exit, 5876 }; 5877 5878 /************************************************************************* 5879 * Beep subdriver 5880 */ 5881 5882 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5883 5884 #define TPACPI_BEEP_Q1 0x0001 5885 5886 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5887 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5888 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5889 }; 5890 5891 static int __init beep_init(struct ibm_init_struct *iibm) 5892 { 5893 unsigned long quirks; 5894 5895 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5896 5897 TPACPI_ACPIHANDLE_INIT(beep); 5898 5899 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5900 str_supported(beep_handle != NULL)); 5901 5902 quirks = tpacpi_check_quirks(beep_quirk_table, 5903 ARRAY_SIZE(beep_quirk_table)); 5904 5905 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5906 5907 return (beep_handle) ? 0 : 1; 5908 } 5909 5910 static int beep_read(struct seq_file *m) 5911 { 5912 if (!beep_handle) 5913 seq_printf(m, "status:\t\tnot supported\n"); 5914 else { 5915 seq_printf(m, "status:\t\tsupported\n"); 5916 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5917 } 5918 5919 return 0; 5920 } 5921 5922 static int beep_write(char *buf) 5923 { 5924 char *cmd; 5925 int beep_cmd; 5926 5927 if (!beep_handle) 5928 return -ENODEV; 5929 5930 while ((cmd = next_cmd(&buf))) { 5931 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 5932 beep_cmd >= 0 && beep_cmd <= 17) { 5933 /* beep_cmd set */ 5934 } else 5935 return -EINVAL; 5936 if (tp_features.beep_needs_two_args) { 5937 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 5938 beep_cmd, 0)) 5939 return -EIO; 5940 } else { 5941 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 5942 beep_cmd)) 5943 return -EIO; 5944 } 5945 } 5946 5947 return 0; 5948 } 5949 5950 static struct ibm_struct beep_driver_data = { 5951 .name = "beep", 5952 .read = beep_read, 5953 .write = beep_write, 5954 }; 5955 5956 /************************************************************************* 5957 * Thermal subdriver 5958 */ 5959 5960 enum thermal_access_mode { 5961 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 5962 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 5963 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 5964 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 5965 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 5966 }; 5967 5968 enum { /* TPACPI_THERMAL_TPEC_* */ 5969 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 5970 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 5971 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 5972 5973 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 5974 }; 5975 5976 5977 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 5978 struct ibm_thermal_sensors_struct { 5979 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 5980 }; 5981 5982 static enum thermal_access_mode thermal_read_mode; 5983 5984 /* idx is zero-based */ 5985 static int thermal_get_sensor(int idx, s32 *value) 5986 { 5987 int t; 5988 s8 tmp; 5989 char tmpi[5]; 5990 5991 t = TP_EC_THERMAL_TMP0; 5992 5993 switch (thermal_read_mode) { 5994 #if TPACPI_MAX_THERMAL_SENSORS >= 16 5995 case TPACPI_THERMAL_TPEC_16: 5996 if (idx >= 8 && idx <= 15) { 5997 t = TP_EC_THERMAL_TMP8; 5998 idx -= 8; 5999 } 6000 /* fallthrough */ 6001 #endif 6002 case TPACPI_THERMAL_TPEC_8: 6003 if (idx <= 7) { 6004 if (!acpi_ec_read(t + idx, &tmp)) 6005 return -EIO; 6006 *value = tmp * 1000; 6007 return 0; 6008 } 6009 break; 6010 6011 case TPACPI_THERMAL_ACPI_UPDT: 6012 if (idx <= 7) { 6013 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6014 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6015 return -EIO; 6016 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6017 return -EIO; 6018 *value = (t - 2732) * 100; 6019 return 0; 6020 } 6021 break; 6022 6023 case TPACPI_THERMAL_ACPI_TMP07: 6024 if (idx <= 7) { 6025 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6026 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6027 return -EIO; 6028 if (t > 127 || t < -127) 6029 t = TP_EC_THERMAL_TMP_NA; 6030 *value = t * 1000; 6031 return 0; 6032 } 6033 break; 6034 6035 case TPACPI_THERMAL_NONE: 6036 default: 6037 return -ENOSYS; 6038 } 6039 6040 return -EINVAL; 6041 } 6042 6043 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6044 { 6045 int res, i; 6046 int n; 6047 6048 n = 8; 6049 i = 0; 6050 6051 if (!s) 6052 return -EINVAL; 6053 6054 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6055 n = 16; 6056 6057 for (i = 0 ; i < n; i++) { 6058 res = thermal_get_sensor(i, &s->temp[i]); 6059 if (res) 6060 return res; 6061 } 6062 6063 return n; 6064 } 6065 6066 static void thermal_dump_all_sensors(void) 6067 { 6068 int n, i; 6069 struct ibm_thermal_sensors_struct t; 6070 6071 n = thermal_get_sensors(&t); 6072 if (n <= 0) 6073 return; 6074 6075 pr_notice("temperatures (Celsius):"); 6076 6077 for (i = 0; i < n; i++) { 6078 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6079 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6080 else 6081 pr_cont(" N/A"); 6082 } 6083 6084 pr_cont("\n"); 6085 } 6086 6087 /* sysfs temp##_input -------------------------------------------------- */ 6088 6089 static ssize_t thermal_temp_input_show(struct device *dev, 6090 struct device_attribute *attr, 6091 char *buf) 6092 { 6093 struct sensor_device_attribute *sensor_attr = 6094 to_sensor_dev_attr(attr); 6095 int idx = sensor_attr->index; 6096 s32 value; 6097 int res; 6098 6099 res = thermal_get_sensor(idx, &value); 6100 if (res) 6101 return res; 6102 if (value == TPACPI_THERMAL_SENSOR_NA) 6103 return -ENXIO; 6104 6105 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6106 } 6107 6108 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6109 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6110 thermal_temp_input_show, NULL, _idxB) 6111 6112 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6113 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6114 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6115 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6116 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6117 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6118 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6119 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6120 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6121 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6122 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6123 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6124 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6125 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6126 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6127 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6128 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6129 }; 6130 6131 #define THERMAL_ATTRS(X) \ 6132 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6133 6134 static struct attribute *thermal_temp_input_attr[] = { 6135 THERMAL_ATTRS(8), 6136 THERMAL_ATTRS(9), 6137 THERMAL_ATTRS(10), 6138 THERMAL_ATTRS(11), 6139 THERMAL_ATTRS(12), 6140 THERMAL_ATTRS(13), 6141 THERMAL_ATTRS(14), 6142 THERMAL_ATTRS(15), 6143 THERMAL_ATTRS(0), 6144 THERMAL_ATTRS(1), 6145 THERMAL_ATTRS(2), 6146 THERMAL_ATTRS(3), 6147 THERMAL_ATTRS(4), 6148 THERMAL_ATTRS(5), 6149 THERMAL_ATTRS(6), 6150 THERMAL_ATTRS(7), 6151 NULL 6152 }; 6153 6154 static const struct attribute_group thermal_temp_input16_group = { 6155 .attrs = thermal_temp_input_attr 6156 }; 6157 6158 static const struct attribute_group thermal_temp_input8_group = { 6159 .attrs = &thermal_temp_input_attr[8] 6160 }; 6161 6162 #undef THERMAL_SENSOR_ATTR_TEMP 6163 #undef THERMAL_ATTRS 6164 6165 /* --------------------------------------------------------------------- */ 6166 6167 static int __init thermal_init(struct ibm_init_struct *iibm) 6168 { 6169 u8 t, ta1, ta2; 6170 int i; 6171 int acpi_tmp7; 6172 int res; 6173 6174 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6175 6176 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6177 6178 if (thinkpad_id.ec_model) { 6179 /* 6180 * Direct EC access mode: sensors at registers 6181 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6182 * non-implemented, thermal sensors return 0x80 when 6183 * not available 6184 */ 6185 6186 ta1 = ta2 = 0; 6187 for (i = 0; i < 8; i++) { 6188 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6189 ta1 |= t; 6190 } else { 6191 ta1 = 0; 6192 break; 6193 } 6194 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6195 ta2 |= t; 6196 } else { 6197 ta1 = 0; 6198 break; 6199 } 6200 } 6201 if (ta1 == 0) { 6202 /* This is sheer paranoia, but we handle it anyway */ 6203 if (acpi_tmp7) { 6204 pr_err("ThinkPad ACPI EC access misbehaving, " 6205 "falling back to ACPI TMPx access " 6206 "mode\n"); 6207 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6208 } else { 6209 pr_err("ThinkPad ACPI EC access misbehaving, " 6210 "disabling thermal sensors access\n"); 6211 thermal_read_mode = TPACPI_THERMAL_NONE; 6212 } 6213 } else { 6214 thermal_read_mode = 6215 (ta2 != 0) ? 6216 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6217 } 6218 } else if (acpi_tmp7) { 6219 if (tpacpi_is_ibm() && 6220 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6221 /* 600e/x, 770e, 770x */ 6222 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6223 } else { 6224 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6225 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6226 } 6227 } else { 6228 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6229 thermal_read_mode = TPACPI_THERMAL_NONE; 6230 } 6231 6232 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6233 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6234 thermal_read_mode); 6235 6236 switch (thermal_read_mode) { 6237 case TPACPI_THERMAL_TPEC_16: 6238 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 6239 &thermal_temp_input16_group); 6240 if (res) 6241 return res; 6242 break; 6243 case TPACPI_THERMAL_TPEC_8: 6244 case TPACPI_THERMAL_ACPI_TMP07: 6245 case TPACPI_THERMAL_ACPI_UPDT: 6246 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 6247 &thermal_temp_input8_group); 6248 if (res) 6249 return res; 6250 break; 6251 case TPACPI_THERMAL_NONE: 6252 default: 6253 return 1; 6254 } 6255 6256 return 0; 6257 } 6258 6259 static void thermal_exit(void) 6260 { 6261 switch (thermal_read_mode) { 6262 case TPACPI_THERMAL_TPEC_16: 6263 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 6264 &thermal_temp_input16_group); 6265 break; 6266 case TPACPI_THERMAL_TPEC_8: 6267 case TPACPI_THERMAL_ACPI_TMP07: 6268 case TPACPI_THERMAL_ACPI_UPDT: 6269 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 6270 &thermal_temp_input8_group); 6271 break; 6272 case TPACPI_THERMAL_NONE: 6273 default: 6274 break; 6275 } 6276 } 6277 6278 static int thermal_read(struct seq_file *m) 6279 { 6280 int n, i; 6281 struct ibm_thermal_sensors_struct t; 6282 6283 n = thermal_get_sensors(&t); 6284 if (unlikely(n < 0)) 6285 return n; 6286 6287 seq_printf(m, "temperatures:\t"); 6288 6289 if (n > 0) { 6290 for (i = 0; i < (n - 1); i++) 6291 seq_printf(m, "%d ", t.temp[i] / 1000); 6292 seq_printf(m, "%d\n", t.temp[i] / 1000); 6293 } else 6294 seq_printf(m, "not supported\n"); 6295 6296 return 0; 6297 } 6298 6299 static struct ibm_struct thermal_driver_data = { 6300 .name = "thermal", 6301 .read = thermal_read, 6302 .exit = thermal_exit, 6303 }; 6304 6305 /************************************************************************* 6306 * Backlight/brightness subdriver 6307 */ 6308 6309 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6310 6311 /* 6312 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6313 * CMOS NVRAM byte 0x5E, bits 0-3. 6314 * 6315 * EC HBRV (0x31) has the following layout 6316 * Bit 7: unknown function 6317 * Bit 6: unknown function 6318 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6319 * Bit 4: must be set to zero to avoid problems 6320 * Bit 3-0: backlight brightness level 6321 * 6322 * brightness_get_raw returns status data in the HBRV layout 6323 * 6324 * WARNING: The X61 has been verified to use HBRV for something else, so 6325 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6326 * testing on the very early *60 Lenovo models... 6327 */ 6328 6329 enum { 6330 TP_EC_BACKLIGHT = 0x31, 6331 6332 /* TP_EC_BACKLIGHT bitmasks */ 6333 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6334 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6335 TP_EC_BACKLIGHT_MAPSW = 0x20, 6336 }; 6337 6338 enum tpacpi_brightness_access_mode { 6339 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6340 TPACPI_BRGHT_MODE_EC, /* EC control */ 6341 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6342 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6343 TPACPI_BRGHT_MODE_MAX 6344 }; 6345 6346 static struct backlight_device *ibm_backlight_device; 6347 6348 static enum tpacpi_brightness_access_mode brightness_mode = 6349 TPACPI_BRGHT_MODE_MAX; 6350 6351 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6352 6353 static struct mutex brightness_mutex; 6354 6355 /* NVRAM brightness access, 6356 * call with brightness_mutex held! */ 6357 static unsigned int tpacpi_brightness_nvram_get(void) 6358 { 6359 u8 lnvram; 6360 6361 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6362 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6363 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6364 lnvram &= bright_maxlvl; 6365 6366 return lnvram; 6367 } 6368 6369 static void tpacpi_brightness_checkpoint_nvram(void) 6370 { 6371 u8 lec = 0; 6372 u8 b_nvram; 6373 6374 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6375 return; 6376 6377 vdbg_printk(TPACPI_DBG_BRGHT, 6378 "trying to checkpoint backlight level to NVRAM...\n"); 6379 6380 if (mutex_lock_killable(&brightness_mutex) < 0) 6381 return; 6382 6383 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6384 goto unlock; 6385 lec &= TP_EC_BACKLIGHT_LVLMSK; 6386 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6387 6388 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6389 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6390 /* NVRAM needs update */ 6391 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6392 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6393 b_nvram |= lec; 6394 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6395 dbg_printk(TPACPI_DBG_BRGHT, 6396 "updated NVRAM backlight level to %u (0x%02x)\n", 6397 (unsigned int) lec, (unsigned int) b_nvram); 6398 } else 6399 vdbg_printk(TPACPI_DBG_BRGHT, 6400 "NVRAM backlight level already is %u (0x%02x)\n", 6401 (unsigned int) lec, (unsigned int) b_nvram); 6402 6403 unlock: 6404 mutex_unlock(&brightness_mutex); 6405 } 6406 6407 6408 /* call with brightness_mutex held! */ 6409 static int tpacpi_brightness_get_raw(int *status) 6410 { 6411 u8 lec = 0; 6412 6413 switch (brightness_mode) { 6414 case TPACPI_BRGHT_MODE_UCMS_STEP: 6415 *status = tpacpi_brightness_nvram_get(); 6416 return 0; 6417 case TPACPI_BRGHT_MODE_EC: 6418 case TPACPI_BRGHT_MODE_ECNVRAM: 6419 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6420 return -EIO; 6421 *status = lec; 6422 return 0; 6423 default: 6424 return -ENXIO; 6425 } 6426 } 6427 6428 /* call with brightness_mutex held! */ 6429 /* do NOT call with illegal backlight level value */ 6430 static int tpacpi_brightness_set_ec(unsigned int value) 6431 { 6432 u8 lec = 0; 6433 6434 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6435 return -EIO; 6436 6437 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6438 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6439 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6440 return -EIO; 6441 6442 return 0; 6443 } 6444 6445 /* call with brightness_mutex held! */ 6446 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6447 { 6448 int cmos_cmd, inc; 6449 unsigned int current_value, i; 6450 6451 current_value = tpacpi_brightness_nvram_get(); 6452 6453 if (value == current_value) 6454 return 0; 6455 6456 cmos_cmd = (value > current_value) ? 6457 TP_CMOS_BRIGHTNESS_UP : 6458 TP_CMOS_BRIGHTNESS_DOWN; 6459 inc = (value > current_value) ? 1 : -1; 6460 6461 for (i = current_value; i != value; i += inc) 6462 if (issue_thinkpad_cmos_command(cmos_cmd)) 6463 return -EIO; 6464 6465 return 0; 6466 } 6467 6468 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6469 static int brightness_set(unsigned int value) 6470 { 6471 int res; 6472 6473 if (value > bright_maxlvl) 6474 return -EINVAL; 6475 6476 vdbg_printk(TPACPI_DBG_BRGHT, 6477 "set backlight level to %d\n", value); 6478 6479 res = mutex_lock_killable(&brightness_mutex); 6480 if (res < 0) 6481 return res; 6482 6483 switch (brightness_mode) { 6484 case TPACPI_BRGHT_MODE_EC: 6485 case TPACPI_BRGHT_MODE_ECNVRAM: 6486 res = tpacpi_brightness_set_ec(value); 6487 break; 6488 case TPACPI_BRGHT_MODE_UCMS_STEP: 6489 res = tpacpi_brightness_set_ucmsstep(value); 6490 break; 6491 default: 6492 res = -ENXIO; 6493 } 6494 6495 mutex_unlock(&brightness_mutex); 6496 return res; 6497 } 6498 6499 /* sysfs backlight class ----------------------------------------------- */ 6500 6501 static int brightness_update_status(struct backlight_device *bd) 6502 { 6503 unsigned int level = 6504 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6505 bd->props.power == FB_BLANK_UNBLANK) ? 6506 bd->props.brightness : 0; 6507 6508 dbg_printk(TPACPI_DBG_BRGHT, 6509 "backlight: attempt to set level to %d\n", 6510 level); 6511 6512 /* it is the backlight class's job (caller) to handle 6513 * EINTR and other errors properly */ 6514 return brightness_set(level); 6515 } 6516 6517 static int brightness_get(struct backlight_device *bd) 6518 { 6519 int status, res; 6520 6521 res = mutex_lock_killable(&brightness_mutex); 6522 if (res < 0) 6523 return 0; 6524 6525 res = tpacpi_brightness_get_raw(&status); 6526 6527 mutex_unlock(&brightness_mutex); 6528 6529 if (res < 0) 6530 return 0; 6531 6532 return status & TP_EC_BACKLIGHT_LVLMSK; 6533 } 6534 6535 static void tpacpi_brightness_notify_change(void) 6536 { 6537 backlight_force_update(ibm_backlight_device, 6538 BACKLIGHT_UPDATE_HOTKEY); 6539 } 6540 6541 static const struct backlight_ops ibm_backlight_data = { 6542 .get_brightness = brightness_get, 6543 .update_status = brightness_update_status, 6544 }; 6545 6546 /* --------------------------------------------------------------------- */ 6547 6548 /* 6549 * Call _BCL method of video device. On some ThinkPads this will 6550 * switch the firmware to the ACPI brightness control mode. 6551 */ 6552 6553 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6554 { 6555 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6556 union acpi_object *obj; 6557 struct acpi_device *device, *child; 6558 int rc; 6559 6560 if (acpi_bus_get_device(handle, &device)) 6561 return 0; 6562 6563 rc = 0; 6564 list_for_each_entry(child, &device->children, node) { 6565 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6566 NULL, &buffer); 6567 if (ACPI_FAILURE(status)) 6568 continue; 6569 6570 obj = (union acpi_object *)buffer.pointer; 6571 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6572 pr_err("Unknown _BCL data, please report this to %s\n", 6573 TPACPI_MAIL); 6574 rc = 0; 6575 } else { 6576 rc = obj->package.count; 6577 } 6578 break; 6579 } 6580 6581 kfree(buffer.pointer); 6582 return rc; 6583 } 6584 6585 6586 /* 6587 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6588 */ 6589 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6590 { 6591 acpi_handle video_device; 6592 int bcl_levels = 0; 6593 6594 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6595 if (video_device) 6596 bcl_levels = tpacpi_query_bcl_levels(video_device); 6597 6598 tp_features.bright_acpimode = (bcl_levels > 0); 6599 6600 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6601 } 6602 6603 /* 6604 * These are only useful for models that have only one possibility 6605 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6606 * these quirks. 6607 */ 6608 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6609 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6610 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6611 6612 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6613 /* Models with ATI GPUs known to require ECNVRAM mode */ 6614 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6615 6616 /* Models with ATI GPUs that can use ECNVRAM */ 6617 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6618 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6619 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6620 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6621 6622 /* Models with Intel Extreme Graphics 2 */ 6623 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6624 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6625 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6626 6627 /* Models with Intel GMA900 */ 6628 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6629 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6630 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6631 }; 6632 6633 /* 6634 * Returns < 0 for error, otherwise sets tp_features.bright_* 6635 * and bright_maxlvl. 6636 */ 6637 static void __init tpacpi_detect_brightness_capabilities(void) 6638 { 6639 unsigned int b; 6640 6641 vdbg_printk(TPACPI_DBG_INIT, 6642 "detecting firmware brightness interface capabilities\n"); 6643 6644 /* we could run a quirks check here (same table used by 6645 * brightness_init) if needed */ 6646 6647 /* 6648 * We always attempt to detect acpi support, so as to switch 6649 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6650 * going to publish a backlight interface 6651 */ 6652 b = tpacpi_check_std_acpi_brightness_support(); 6653 switch (b) { 6654 case 16: 6655 bright_maxlvl = 15; 6656 pr_info("detected a 16-level brightness capable ThinkPad\n"); 6657 break; 6658 case 8: 6659 case 0: 6660 bright_maxlvl = 7; 6661 pr_info("detected a 8-level brightness capable ThinkPad\n"); 6662 break; 6663 default: 6664 pr_info("Unsupported brightness interface\n"); 6665 tp_features.bright_unkfw = 1; 6666 bright_maxlvl = b - 1; 6667 } 6668 } 6669 6670 static int __init brightness_init(struct ibm_init_struct *iibm) 6671 { 6672 struct backlight_properties props; 6673 int b; 6674 unsigned long quirks; 6675 6676 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6677 6678 mutex_init(&brightness_mutex); 6679 6680 quirks = tpacpi_check_quirks(brightness_quirk_table, 6681 ARRAY_SIZE(brightness_quirk_table)); 6682 6683 /* tpacpi_detect_brightness_capabilities() must have run already */ 6684 6685 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6686 if (tp_features.bright_unkfw) 6687 return 1; 6688 6689 if (!brightness_enable) { 6690 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6691 "brightness support disabled by " 6692 "module parameter\n"); 6693 return 1; 6694 } 6695 6696 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6697 if (brightness_enable > 1) { 6698 pr_info("Standard ACPI backlight interface " 6699 "available, not loading native one\n"); 6700 return 1; 6701 } else if (brightness_enable == 1) { 6702 pr_warn("Cannot enable backlight brightness support, " 6703 "ACPI is already handling it. Refer to the " 6704 "acpi_backlight kernel parameter.\n"); 6705 return 1; 6706 } 6707 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6708 pr_notice("Standard ACPI backlight interface not " 6709 "available, thinkpad_acpi native " 6710 "brightness control enabled\n"); 6711 } 6712 6713 /* 6714 * Check for module parameter bogosity, note that we 6715 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6716 * able to detect "unspecified" 6717 */ 6718 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6719 return -EINVAL; 6720 6721 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6722 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6723 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6724 if (quirks & TPACPI_BRGHT_Q_EC) 6725 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6726 else 6727 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6728 6729 dbg_printk(TPACPI_DBG_BRGHT, 6730 "driver auto-selected brightness_mode=%d\n", 6731 brightness_mode); 6732 } 6733 6734 /* Safety */ 6735 if (!tpacpi_is_ibm() && 6736 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6737 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6738 return -EINVAL; 6739 6740 if (tpacpi_brightness_get_raw(&b) < 0) 6741 return 1; 6742 6743 memset(&props, 0, sizeof(struct backlight_properties)); 6744 props.type = BACKLIGHT_PLATFORM; 6745 props.max_brightness = bright_maxlvl; 6746 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6747 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6748 NULL, NULL, 6749 &ibm_backlight_data, 6750 &props); 6751 if (IS_ERR(ibm_backlight_device)) { 6752 int rc = PTR_ERR(ibm_backlight_device); 6753 ibm_backlight_device = NULL; 6754 pr_err("Could not register backlight device\n"); 6755 return rc; 6756 } 6757 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6758 "brightness is supported\n"); 6759 6760 if (quirks & TPACPI_BRGHT_Q_ASK) { 6761 pr_notice("brightness: will use unverified default: " 6762 "brightness_mode=%d\n", brightness_mode); 6763 pr_notice("brightness: please report to %s whether it works well " 6764 "or not on your ThinkPad\n", TPACPI_MAIL); 6765 } 6766 6767 /* Added by mistake in early 2007. Probably useless, but it could 6768 * be working around some unknown firmware problem where the value 6769 * read at startup doesn't match the real hardware state... so leave 6770 * it in place just in case */ 6771 backlight_update_status(ibm_backlight_device); 6772 6773 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6774 "brightness: registering brightness hotkeys " 6775 "as change notification\n"); 6776 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6777 | TP_ACPI_HKEY_BRGHTUP_MASK 6778 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6779 return 0; 6780 } 6781 6782 static void brightness_suspend(void) 6783 { 6784 tpacpi_brightness_checkpoint_nvram(); 6785 } 6786 6787 static void brightness_shutdown(void) 6788 { 6789 tpacpi_brightness_checkpoint_nvram(); 6790 } 6791 6792 static void brightness_exit(void) 6793 { 6794 if (ibm_backlight_device) { 6795 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6796 "calling backlight_device_unregister()\n"); 6797 backlight_device_unregister(ibm_backlight_device); 6798 } 6799 6800 tpacpi_brightness_checkpoint_nvram(); 6801 } 6802 6803 static int brightness_read(struct seq_file *m) 6804 { 6805 int level; 6806 6807 level = brightness_get(NULL); 6808 if (level < 0) { 6809 seq_printf(m, "level:\t\tunreadable\n"); 6810 } else { 6811 seq_printf(m, "level:\t\t%d\n", level); 6812 seq_printf(m, "commands:\tup, down\n"); 6813 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6814 bright_maxlvl); 6815 } 6816 6817 return 0; 6818 } 6819 6820 static int brightness_write(char *buf) 6821 { 6822 int level; 6823 int rc; 6824 char *cmd; 6825 6826 level = brightness_get(NULL); 6827 if (level < 0) 6828 return level; 6829 6830 while ((cmd = next_cmd(&buf))) { 6831 if (strlencmp(cmd, "up") == 0) { 6832 if (level < bright_maxlvl) 6833 level++; 6834 } else if (strlencmp(cmd, "down") == 0) { 6835 if (level > 0) 6836 level--; 6837 } else if (sscanf(cmd, "level %d", &level) == 1 && 6838 level >= 0 && level <= bright_maxlvl) { 6839 /* new level set */ 6840 } else 6841 return -EINVAL; 6842 } 6843 6844 tpacpi_disclose_usertask("procfs brightness", 6845 "set level to %d\n", level); 6846 6847 /* 6848 * Now we know what the final level should be, so we try to set it. 6849 * Doing it this way makes the syscall restartable in case of EINTR 6850 */ 6851 rc = brightness_set(level); 6852 if (!rc && ibm_backlight_device) 6853 backlight_force_update(ibm_backlight_device, 6854 BACKLIGHT_UPDATE_SYSFS); 6855 return (rc == -EINTR) ? -ERESTARTSYS : rc; 6856 } 6857 6858 static struct ibm_struct brightness_driver_data = { 6859 .name = "brightness", 6860 .read = brightness_read, 6861 .write = brightness_write, 6862 .exit = brightness_exit, 6863 .suspend = brightness_suspend, 6864 .shutdown = brightness_shutdown, 6865 }; 6866 6867 /************************************************************************* 6868 * Volume subdriver 6869 */ 6870 6871 /* 6872 * IBM ThinkPads have a simple volume controller with MUTE gating. 6873 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 6874 * 6875 * Since the *61 series (and probably also the later *60 series), Lenovo 6876 * ThinkPads only implement the MUTE gate. 6877 * 6878 * EC register 0x30 6879 * Bit 6: MUTE (1 mutes sound) 6880 * Bit 3-0: Volume 6881 * Other bits should be zero as far as we know. 6882 * 6883 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 6884 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 6885 * such as bit 7 which is used to detect repeated presses of MUTE, 6886 * and we leave them unchanged. 6887 * 6888 * On newer Lenovo ThinkPads, the EC can automatically change the volume 6889 * in response to user input. Unfortunately, this rarely works well. 6890 * The laptop changes the state of its internal MUTE gate and, on some 6891 * models, sends KEY_MUTE, causing any user code that responds to the 6892 * mute button to get confused. The hardware MUTE gate is also 6893 * unnecessary, since user code can handle the mute button without 6894 * kernel or EC help. 6895 * 6896 * To avoid confusing userspace, we simply disable all EC-based mute 6897 * and volume controls when possible. 6898 */ 6899 6900 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 6901 6902 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 6903 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 6904 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 6905 6906 #if SNDRV_CARDS <= 32 6907 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 6908 #else 6909 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 6910 #endif 6911 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 6912 static char *alsa_id = "ThinkPadEC"; 6913 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 6914 6915 struct tpacpi_alsa_data { 6916 struct snd_card *card; 6917 struct snd_ctl_elem_id *ctl_mute_id; 6918 struct snd_ctl_elem_id *ctl_vol_id; 6919 }; 6920 6921 static struct snd_card *alsa_card; 6922 6923 enum { 6924 TP_EC_AUDIO = 0x30, 6925 6926 /* TP_EC_AUDIO bits */ 6927 TP_EC_AUDIO_MUTESW = 6, 6928 6929 /* TP_EC_AUDIO bitmasks */ 6930 TP_EC_AUDIO_LVL_MSK = 0x0F, 6931 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 6932 6933 /* Maximum volume */ 6934 TP_EC_VOLUME_MAX = 14, 6935 }; 6936 6937 enum tpacpi_volume_access_mode { 6938 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 6939 TPACPI_VOL_MODE_EC, /* Pure EC control */ 6940 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 6941 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6942 TPACPI_VOL_MODE_MAX 6943 }; 6944 6945 enum tpacpi_volume_capabilities { 6946 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 6947 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 6948 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 6949 TPACPI_VOL_CAP_MAX 6950 }; 6951 6952 enum tpacpi_mute_btn_mode { 6953 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 6954 /* We don't know what mode 1 is. */ 6955 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 6956 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 6957 }; 6958 6959 static enum tpacpi_volume_access_mode volume_mode = 6960 TPACPI_VOL_MODE_MAX; 6961 6962 static enum tpacpi_volume_capabilities volume_capabilities; 6963 static bool volume_control_allowed; 6964 static bool software_mute_requested = true; 6965 static bool software_mute_active; 6966 static int software_mute_orig_mode; 6967 6968 /* 6969 * Used to syncronize writers to TP_EC_AUDIO and 6970 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 6971 */ 6972 static struct mutex volume_mutex; 6973 6974 static void tpacpi_volume_checkpoint_nvram(void) 6975 { 6976 u8 lec = 0; 6977 u8 b_nvram; 6978 u8 ec_mask; 6979 6980 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 6981 return; 6982 if (!volume_control_allowed) 6983 return; 6984 if (software_mute_active) 6985 return; 6986 6987 vdbg_printk(TPACPI_DBG_MIXER, 6988 "trying to checkpoint mixer state to NVRAM...\n"); 6989 6990 if (tp_features.mixer_no_level_control) 6991 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 6992 else 6993 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 6994 6995 if (mutex_lock_killable(&volume_mutex) < 0) 6996 return; 6997 6998 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 6999 goto unlock; 7000 lec &= ec_mask; 7001 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7002 7003 if (lec != (b_nvram & ec_mask)) { 7004 /* NVRAM needs update */ 7005 b_nvram &= ~ec_mask; 7006 b_nvram |= lec; 7007 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7008 dbg_printk(TPACPI_DBG_MIXER, 7009 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7010 (unsigned int) lec, (unsigned int) b_nvram); 7011 } else { 7012 vdbg_printk(TPACPI_DBG_MIXER, 7013 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7014 (unsigned int) lec, (unsigned int) b_nvram); 7015 } 7016 7017 unlock: 7018 mutex_unlock(&volume_mutex); 7019 } 7020 7021 static int volume_get_status_ec(u8 *status) 7022 { 7023 u8 s; 7024 7025 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7026 return -EIO; 7027 7028 *status = s; 7029 7030 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7031 7032 return 0; 7033 } 7034 7035 static int volume_get_status(u8 *status) 7036 { 7037 return volume_get_status_ec(status); 7038 } 7039 7040 static int volume_set_status_ec(const u8 status) 7041 { 7042 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7043 return -EIO; 7044 7045 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7046 7047 /* 7048 * On X200s, and possibly on others, it can take a while for 7049 * reads to become correct. 7050 */ 7051 msleep(1); 7052 7053 return 0; 7054 } 7055 7056 static int volume_set_status(const u8 status) 7057 { 7058 return volume_set_status_ec(status); 7059 } 7060 7061 /* returns < 0 on error, 0 on no change, 1 on change */ 7062 static int __volume_set_mute_ec(const bool mute) 7063 { 7064 int rc; 7065 u8 s, n; 7066 7067 if (mutex_lock_killable(&volume_mutex) < 0) 7068 return -EINTR; 7069 7070 rc = volume_get_status_ec(&s); 7071 if (rc) 7072 goto unlock; 7073 7074 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7075 s & ~TP_EC_AUDIO_MUTESW_MSK; 7076 7077 if (n != s) { 7078 rc = volume_set_status_ec(n); 7079 if (!rc) 7080 rc = 1; 7081 } 7082 7083 unlock: 7084 mutex_unlock(&volume_mutex); 7085 return rc; 7086 } 7087 7088 static int volume_alsa_set_mute(const bool mute) 7089 { 7090 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7091 (mute) ? "" : "un"); 7092 return __volume_set_mute_ec(mute); 7093 } 7094 7095 static int volume_set_mute(const bool mute) 7096 { 7097 int rc; 7098 7099 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7100 (mute) ? "" : "un"); 7101 7102 rc = __volume_set_mute_ec(mute); 7103 return (rc < 0) ? rc : 0; 7104 } 7105 7106 /* returns < 0 on error, 0 on no change, 1 on change */ 7107 static int __volume_set_volume_ec(const u8 vol) 7108 { 7109 int rc; 7110 u8 s, n; 7111 7112 if (vol > TP_EC_VOLUME_MAX) 7113 return -EINVAL; 7114 7115 if (mutex_lock_killable(&volume_mutex) < 0) 7116 return -EINTR; 7117 7118 rc = volume_get_status_ec(&s); 7119 if (rc) 7120 goto unlock; 7121 7122 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7123 7124 if (n != s) { 7125 rc = volume_set_status_ec(n); 7126 if (!rc) 7127 rc = 1; 7128 } 7129 7130 unlock: 7131 mutex_unlock(&volume_mutex); 7132 return rc; 7133 } 7134 7135 static int volume_set_software_mute(bool startup) 7136 { 7137 int result; 7138 7139 if (!tpacpi_is_lenovo()) 7140 return -ENODEV; 7141 7142 if (startup) { 7143 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7144 "HAUM", "qd")) 7145 return -EIO; 7146 7147 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7148 "Initial HAUM setting was %d\n", 7149 software_mute_orig_mode); 7150 } 7151 7152 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7153 (int)TP_EC_MUTE_BTN_NONE)) 7154 return -EIO; 7155 7156 if (result != TP_EC_MUTE_BTN_NONE) 7157 pr_warn("Unexpected SAUM result %d\n", 7158 result); 7159 7160 /* 7161 * In software mute mode, the standard codec controls take 7162 * precendence, so we unmute the ThinkPad HW switch at 7163 * startup. Just on case there are SAUM-capable ThinkPads 7164 * with level controls, set max HW volume as well. 7165 */ 7166 if (tp_features.mixer_no_level_control) 7167 result = volume_set_mute(false); 7168 else 7169 result = volume_set_status(TP_EC_VOLUME_MAX); 7170 7171 if (result != 0) 7172 pr_warn("Failed to unmute the HW mute switch\n"); 7173 7174 return 0; 7175 } 7176 7177 static void volume_exit_software_mute(void) 7178 { 7179 int r; 7180 7181 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7182 || r != software_mute_orig_mode) 7183 pr_warn("Failed to restore mute mode\n"); 7184 } 7185 7186 static int volume_alsa_set_volume(const u8 vol) 7187 { 7188 dbg_printk(TPACPI_DBG_MIXER, 7189 "ALSA: trying to set volume level to %hu\n", vol); 7190 return __volume_set_volume_ec(vol); 7191 } 7192 7193 static void volume_alsa_notify_change(void) 7194 { 7195 struct tpacpi_alsa_data *d; 7196 7197 if (alsa_card && alsa_card->private_data) { 7198 d = alsa_card->private_data; 7199 if (d->ctl_mute_id) 7200 snd_ctl_notify(alsa_card, 7201 SNDRV_CTL_EVENT_MASK_VALUE, 7202 d->ctl_mute_id); 7203 if (d->ctl_vol_id) 7204 snd_ctl_notify(alsa_card, 7205 SNDRV_CTL_EVENT_MASK_VALUE, 7206 d->ctl_vol_id); 7207 } 7208 } 7209 7210 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7211 struct snd_ctl_elem_info *uinfo) 7212 { 7213 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7214 uinfo->count = 1; 7215 uinfo->value.integer.min = 0; 7216 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7217 return 0; 7218 } 7219 7220 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7221 struct snd_ctl_elem_value *ucontrol) 7222 { 7223 u8 s; 7224 int rc; 7225 7226 rc = volume_get_status(&s); 7227 if (rc < 0) 7228 return rc; 7229 7230 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7231 return 0; 7232 } 7233 7234 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7235 struct snd_ctl_elem_value *ucontrol) 7236 { 7237 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7238 ucontrol->value.integer.value[0]); 7239 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7240 } 7241 7242 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7243 7244 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7245 struct snd_ctl_elem_value *ucontrol) 7246 { 7247 u8 s; 7248 int rc; 7249 7250 rc = volume_get_status(&s); 7251 if (rc < 0) 7252 return rc; 7253 7254 ucontrol->value.integer.value[0] = 7255 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7256 return 0; 7257 } 7258 7259 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7260 struct snd_ctl_elem_value *ucontrol) 7261 { 7262 tpacpi_disclose_usertask("ALSA", "%smute\n", 7263 ucontrol->value.integer.value[0] ? 7264 "un" : ""); 7265 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7266 } 7267 7268 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7269 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7270 .name = "Console Playback Volume", 7271 .index = 0, 7272 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7273 .info = volume_alsa_vol_info, 7274 .get = volume_alsa_vol_get, 7275 }; 7276 7277 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7278 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7279 .name = "Console Playback Switch", 7280 .index = 0, 7281 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7282 .info = volume_alsa_mute_info, 7283 .get = volume_alsa_mute_get, 7284 }; 7285 7286 static void volume_suspend(void) 7287 { 7288 tpacpi_volume_checkpoint_nvram(); 7289 } 7290 7291 static void volume_resume(void) 7292 { 7293 if (software_mute_active) { 7294 if (volume_set_software_mute(false) < 0) 7295 pr_warn("Failed to restore software mute\n"); 7296 } else { 7297 volume_alsa_notify_change(); 7298 } 7299 } 7300 7301 static void volume_shutdown(void) 7302 { 7303 tpacpi_volume_checkpoint_nvram(); 7304 } 7305 7306 static void volume_exit(void) 7307 { 7308 if (alsa_card) { 7309 snd_card_free(alsa_card); 7310 alsa_card = NULL; 7311 } 7312 7313 tpacpi_volume_checkpoint_nvram(); 7314 7315 if (software_mute_active) 7316 volume_exit_software_mute(); 7317 } 7318 7319 static int __init volume_create_alsa_mixer(void) 7320 { 7321 struct snd_card *card; 7322 struct tpacpi_alsa_data *data; 7323 struct snd_kcontrol *ctl_vol; 7324 struct snd_kcontrol *ctl_mute; 7325 int rc; 7326 7327 rc = snd_card_new(&tpacpi_pdev->dev, 7328 alsa_index, alsa_id, THIS_MODULE, 7329 sizeof(struct tpacpi_alsa_data), &card); 7330 if (rc < 0 || !card) { 7331 pr_err("Failed to create ALSA card structures: %d\n", rc); 7332 return 1; 7333 } 7334 7335 BUG_ON(!card->private_data); 7336 data = card->private_data; 7337 data->card = card; 7338 7339 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7340 sizeof(card->driver)); 7341 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7342 sizeof(card->shortname)); 7343 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7344 (thinkpad_id.ec_version_str) ? 7345 thinkpad_id.ec_version_str : "(unknown)"); 7346 snprintf(card->longname, sizeof(card->longname), 7347 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7348 (thinkpad_id.ec_version_str) ? 7349 thinkpad_id.ec_version_str : "unknown"); 7350 7351 if (volume_control_allowed) { 7352 volume_alsa_control_vol.put = volume_alsa_vol_put; 7353 volume_alsa_control_vol.access = 7354 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7355 7356 volume_alsa_control_mute.put = volume_alsa_mute_put; 7357 volume_alsa_control_mute.access = 7358 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7359 } 7360 7361 if (!tp_features.mixer_no_level_control) { 7362 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7363 rc = snd_ctl_add(card, ctl_vol); 7364 if (rc < 0) { 7365 pr_err("Failed to create ALSA volume control: %d\n", 7366 rc); 7367 goto err_exit; 7368 } 7369 data->ctl_vol_id = &ctl_vol->id; 7370 } 7371 7372 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7373 rc = snd_ctl_add(card, ctl_mute); 7374 if (rc < 0) { 7375 pr_err("Failed to create ALSA mute control: %d\n", rc); 7376 goto err_exit; 7377 } 7378 data->ctl_mute_id = &ctl_mute->id; 7379 7380 rc = snd_card_register(card); 7381 if (rc < 0) { 7382 pr_err("Failed to register ALSA card: %d\n", rc); 7383 goto err_exit; 7384 } 7385 7386 alsa_card = card; 7387 return 0; 7388 7389 err_exit: 7390 snd_card_free(card); 7391 return 1; 7392 } 7393 7394 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7395 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7396 7397 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7398 /* Whitelist volume level on all IBM by default */ 7399 { .vendor = PCI_VENDOR_ID_IBM, 7400 .bios = TPACPI_MATCH_ANY, 7401 .ec = TPACPI_MATCH_ANY, 7402 .quirks = TPACPI_VOL_Q_LEVEL }, 7403 7404 /* Lenovo models with volume control (needs confirmation) */ 7405 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7406 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7407 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7408 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7409 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7410 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7411 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7412 7413 /* Whitelist mute-only on all Lenovo by default */ 7414 { .vendor = PCI_VENDOR_ID_LENOVO, 7415 .bios = TPACPI_MATCH_ANY, 7416 .ec = TPACPI_MATCH_ANY, 7417 .quirks = TPACPI_VOL_Q_MUTEONLY } 7418 }; 7419 7420 static int __init volume_init(struct ibm_init_struct *iibm) 7421 { 7422 unsigned long quirks; 7423 int rc; 7424 7425 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7426 7427 mutex_init(&volume_mutex); 7428 7429 /* 7430 * Check for module parameter bogosity, note that we 7431 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7432 * able to detect "unspecified" 7433 */ 7434 if (volume_mode > TPACPI_VOL_MODE_MAX) 7435 return -EINVAL; 7436 7437 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7438 pr_err("UCMS step volume mode not implemented, " 7439 "please contact %s\n", TPACPI_MAIL); 7440 return 1; 7441 } 7442 7443 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7444 return -EINVAL; 7445 7446 /* 7447 * The ALSA mixer is our primary interface. 7448 * When disabled, don't install the subdriver at all 7449 */ 7450 if (!alsa_enable) { 7451 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7452 "ALSA mixer disabled by parameter, " 7453 "not loading volume subdriver...\n"); 7454 return 1; 7455 } 7456 7457 quirks = tpacpi_check_quirks(volume_quirk_table, 7458 ARRAY_SIZE(volume_quirk_table)); 7459 7460 switch (volume_capabilities) { 7461 case TPACPI_VOL_CAP_AUTO: 7462 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7463 tp_features.mixer_no_level_control = 1; 7464 else if (quirks & TPACPI_VOL_Q_LEVEL) 7465 tp_features.mixer_no_level_control = 0; 7466 else 7467 return 1; /* no mixer */ 7468 break; 7469 case TPACPI_VOL_CAP_VOLMUTE: 7470 tp_features.mixer_no_level_control = 0; 7471 break; 7472 case TPACPI_VOL_CAP_MUTEONLY: 7473 tp_features.mixer_no_level_control = 1; 7474 break; 7475 default: 7476 return 1; 7477 } 7478 7479 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7480 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7481 "using user-supplied volume_capabilities=%d\n", 7482 volume_capabilities); 7483 7484 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7485 volume_mode == TPACPI_VOL_MODE_MAX) { 7486 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7487 7488 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7489 "driver auto-selected volume_mode=%d\n", 7490 volume_mode); 7491 } else { 7492 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7493 "using user-supplied volume_mode=%d\n", 7494 volume_mode); 7495 } 7496 7497 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7498 "mute is supported, volume control is %s\n", 7499 str_supported(!tp_features.mixer_no_level_control)); 7500 7501 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7502 software_mute_active = true; 7503 } else { 7504 rc = volume_create_alsa_mixer(); 7505 if (rc) { 7506 pr_err("Could not create the ALSA mixer interface\n"); 7507 return rc; 7508 } 7509 7510 pr_info("Console audio control enabled, mode: %s\n", 7511 (volume_control_allowed) ? 7512 "override (read/write)" : 7513 "monitor (read only)"); 7514 } 7515 7516 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7517 "registering volume hotkeys as change notification\n"); 7518 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7519 | TP_ACPI_HKEY_VOLUP_MASK 7520 | TP_ACPI_HKEY_VOLDWN_MASK 7521 | TP_ACPI_HKEY_MUTE_MASK); 7522 7523 return 0; 7524 } 7525 7526 static int volume_read(struct seq_file *m) 7527 { 7528 u8 status; 7529 7530 if (volume_get_status(&status) < 0) { 7531 seq_printf(m, "level:\t\tunreadable\n"); 7532 } else { 7533 if (tp_features.mixer_no_level_control) 7534 seq_printf(m, "level:\t\tunsupported\n"); 7535 else 7536 seq_printf(m, "level:\t\t%d\n", 7537 status & TP_EC_AUDIO_LVL_MSK); 7538 7539 seq_printf(m, "mute:\t\t%s\n", 7540 onoff(status, TP_EC_AUDIO_MUTESW)); 7541 7542 if (volume_control_allowed) { 7543 seq_printf(m, "commands:\tunmute, mute\n"); 7544 if (!tp_features.mixer_no_level_control) { 7545 seq_printf(m, 7546 "commands:\tup, down\n"); 7547 seq_printf(m, 7548 "commands:\tlevel <level>" 7549 " (<level> is 0-%d)\n", 7550 TP_EC_VOLUME_MAX); 7551 } 7552 } 7553 } 7554 7555 return 0; 7556 } 7557 7558 static int volume_write(char *buf) 7559 { 7560 u8 s; 7561 u8 new_level, new_mute; 7562 int l; 7563 char *cmd; 7564 int rc; 7565 7566 /* 7567 * We do allow volume control at driver startup, so that the 7568 * user can set initial state through the volume=... parameter hack. 7569 */ 7570 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7571 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7572 tp_warned.volume_ctrl_forbidden = 1; 7573 pr_notice("Console audio control in monitor mode, " 7574 "changes are not allowed\n"); 7575 pr_notice("Use the volume_control=1 module parameter " 7576 "to enable volume control\n"); 7577 } 7578 return -EPERM; 7579 } 7580 7581 rc = volume_get_status(&s); 7582 if (rc < 0) 7583 return rc; 7584 7585 new_level = s & TP_EC_AUDIO_LVL_MSK; 7586 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7587 7588 while ((cmd = next_cmd(&buf))) { 7589 if (!tp_features.mixer_no_level_control) { 7590 if (strlencmp(cmd, "up") == 0) { 7591 if (new_mute) 7592 new_mute = 0; 7593 else if (new_level < TP_EC_VOLUME_MAX) 7594 new_level++; 7595 continue; 7596 } else if (strlencmp(cmd, "down") == 0) { 7597 if (new_mute) 7598 new_mute = 0; 7599 else if (new_level > 0) 7600 new_level--; 7601 continue; 7602 } else if (sscanf(cmd, "level %u", &l) == 1 && 7603 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7604 new_level = l; 7605 continue; 7606 } 7607 } 7608 if (strlencmp(cmd, "mute") == 0) 7609 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7610 else if (strlencmp(cmd, "unmute") == 0) 7611 new_mute = 0; 7612 else 7613 return -EINVAL; 7614 } 7615 7616 if (tp_features.mixer_no_level_control) { 7617 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7618 new_mute ? "" : "un"); 7619 rc = volume_set_mute(!!new_mute); 7620 } else { 7621 tpacpi_disclose_usertask("procfs volume", 7622 "%smute and set level to %d\n", 7623 new_mute ? "" : "un", new_level); 7624 rc = volume_set_status(new_mute | new_level); 7625 } 7626 volume_alsa_notify_change(); 7627 7628 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7629 } 7630 7631 static struct ibm_struct volume_driver_data = { 7632 .name = "volume", 7633 .read = volume_read, 7634 .write = volume_write, 7635 .exit = volume_exit, 7636 .suspend = volume_suspend, 7637 .resume = volume_resume, 7638 .shutdown = volume_shutdown, 7639 }; 7640 7641 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7642 7643 #define alsa_card NULL 7644 7645 static void inline volume_alsa_notify_change(void) 7646 { 7647 } 7648 7649 static int __init volume_init(struct ibm_init_struct *iibm) 7650 { 7651 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7652 7653 return 1; 7654 } 7655 7656 static struct ibm_struct volume_driver_data = { 7657 .name = "volume", 7658 }; 7659 7660 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7661 7662 /************************************************************************* 7663 * Fan subdriver 7664 */ 7665 7666 /* 7667 * FAN ACCESS MODES 7668 * 7669 * TPACPI_FAN_RD_ACPI_GFAN: 7670 * ACPI GFAN method: returns fan level 7671 * 7672 * see TPACPI_FAN_WR_ACPI_SFAN 7673 * EC 0x2f (HFSP) not available if GFAN exists 7674 * 7675 * TPACPI_FAN_WR_ACPI_SFAN: 7676 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7677 * 7678 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7679 * it for writing. 7680 * 7681 * TPACPI_FAN_WR_TPEC: 7682 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7683 * Supported on almost all ThinkPads 7684 * 7685 * Fan speed changes of any sort (including those caused by the 7686 * disengaged mode) are usually done slowly by the firmware as the 7687 * maximum amount of fan duty cycle change per second seems to be 7688 * limited. 7689 * 7690 * Reading is not available if GFAN exists. 7691 * Writing is not available if SFAN exists. 7692 * 7693 * Bits 7694 * 7 automatic mode engaged; 7695 * (default operation mode of the ThinkPad) 7696 * fan level is ignored in this mode. 7697 * 6 full speed mode (takes precedence over bit 7); 7698 * not available on all thinkpads. May disable 7699 * the tachometer while the fan controller ramps up 7700 * the speed (which can take up to a few *minutes*). 7701 * Speeds up fan to 100% duty-cycle, which is far above 7702 * the standard RPM levels. It is not impossible that 7703 * it could cause hardware damage. 7704 * 5-3 unused in some models. Extra bits for fan level 7705 * in others, but still useless as all values above 7706 * 7 map to the same speed as level 7 in these models. 7707 * 2-0 fan level (0..7 usually) 7708 * 0x00 = stop 7709 * 0x07 = max (set when temperatures critical) 7710 * Some ThinkPads may have other levels, see 7711 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7712 * 7713 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7714 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7715 * does so, its initial value is meaningless (0x07). 7716 * 7717 * For firmware bugs, refer to: 7718 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7719 * 7720 * ---- 7721 * 7722 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7723 * Main fan tachometer reading (in RPM) 7724 * 7725 * This register is present on all ThinkPads with a new-style EC, and 7726 * it is known not to be present on the A21m/e, and T22, as there is 7727 * something else in offset 0x84 according to the ACPI DSDT. Other 7728 * ThinkPads from this same time period (and earlier) probably lack the 7729 * tachometer as well. 7730 * 7731 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7732 * was never fixed by IBM to report the EC firmware version string 7733 * probably support the tachometer (like the early X models), so 7734 * detecting it is quite hard. We need more data to know for sure. 7735 * 7736 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7737 * might result. 7738 * 7739 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7740 * mode. 7741 * 7742 * For firmware bugs, refer to: 7743 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7744 * 7745 * ---- 7746 * 7747 * ThinkPad EC register 0x31 bit 0 (only on select models) 7748 * 7749 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7750 * show the speed of the main fan. When bit 0 of EC register 0x31 7751 * is one, the tachometer registers show the speed of the auxiliary 7752 * fan. 7753 * 7754 * Fan control seems to affect both fans, regardless of the state 7755 * of this bit. 7756 * 7757 * So far, only the firmware for the X60/X61 non-tablet versions 7758 * seem to support this (firmware TP-7M). 7759 * 7760 * TPACPI_FAN_WR_ACPI_FANS: 7761 * ThinkPad X31, X40, X41. Not available in the X60. 7762 * 7763 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7764 * high speed. ACPI DSDT seems to map these three speeds to levels 7765 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7766 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7767 * 7768 * The speeds are stored on handles 7769 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7770 * 7771 * There are three default speed sets, accessible as handles: 7772 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7773 * 7774 * ACPI DSDT switches which set is in use depending on various 7775 * factors. 7776 * 7777 * TPACPI_FAN_WR_TPEC is also available and should be used to 7778 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7779 * but the ACPI tables just mention level 7. 7780 */ 7781 7782 enum { /* Fan control constants */ 7783 fan_status_offset = 0x2f, /* EC register 0x2f */ 7784 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7785 * 0x84 must be read before 0x85 */ 7786 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7787 bit 0 selects which fan is active */ 7788 7789 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7790 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7791 7792 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7793 }; 7794 7795 enum fan_status_access_mode { 7796 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7797 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7798 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7799 }; 7800 7801 enum fan_control_access_mode { 7802 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7803 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7804 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7805 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7806 }; 7807 7808 enum fan_control_commands { 7809 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7810 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7811 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7812 * and also watchdog cmd */ 7813 }; 7814 7815 static bool fan_control_allowed; 7816 7817 static enum fan_status_access_mode fan_status_access_mode; 7818 static enum fan_control_access_mode fan_control_access_mode; 7819 static enum fan_control_commands fan_control_commands; 7820 7821 static u8 fan_control_initial_status; 7822 static u8 fan_control_desired_level; 7823 static u8 fan_control_resume_level; 7824 static int fan_watchdog_maxinterval; 7825 7826 static struct mutex fan_mutex; 7827 7828 static void fan_watchdog_fire(struct work_struct *ignored); 7829 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7830 7831 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7832 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7833 "\\FSPD", /* 600e/x, 770e, 770x */ 7834 ); /* all others */ 7835 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7836 "JFNS", /* 770x-JL */ 7837 ); /* all others */ 7838 7839 /* 7840 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7841 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7842 * be in auto mode (0x80). 7843 * 7844 * This is corrected by any write to HFSP either by the driver, or 7845 * by the firmware. 7846 * 7847 * We assume 0x07 really means auto mode while this quirk is active, 7848 * as this is far more likely than the ThinkPad being in level 7, 7849 * which is only used by the firmware during thermal emergencies. 7850 * 7851 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7852 * TP-70 (T43, R52), which are known to be buggy. 7853 */ 7854 7855 static void fan_quirk1_setup(void) 7856 { 7857 if (fan_control_initial_status == 0x07) { 7858 pr_notice("fan_init: initial fan status is unknown, " 7859 "assuming it is in auto mode\n"); 7860 tp_features.fan_ctrl_status_undef = 1; 7861 } 7862 } 7863 7864 static void fan_quirk1_handle(u8 *fan_status) 7865 { 7866 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7867 if (*fan_status != fan_control_initial_status) { 7868 /* something changed the HFSP regisnter since 7869 * driver init time, so it is not undefined 7870 * anymore */ 7871 tp_features.fan_ctrl_status_undef = 0; 7872 } else { 7873 /* Return most likely status. In fact, it 7874 * might be the only possible status */ 7875 *fan_status = TP_EC_FAN_AUTO; 7876 } 7877 } 7878 } 7879 7880 /* Select main fan on X60/X61, NOOP on others */ 7881 static bool fan_select_fan1(void) 7882 { 7883 if (tp_features.second_fan) { 7884 u8 val; 7885 7886 if (ec_read(fan_select_offset, &val) < 0) 7887 return false; 7888 val &= 0xFEU; 7889 if (ec_write(fan_select_offset, val) < 0) 7890 return false; 7891 } 7892 return true; 7893 } 7894 7895 /* Select secondary fan on X60/X61 */ 7896 static bool fan_select_fan2(void) 7897 { 7898 u8 val; 7899 7900 if (!tp_features.second_fan) 7901 return false; 7902 7903 if (ec_read(fan_select_offset, &val) < 0) 7904 return false; 7905 val |= 0x01U; 7906 if (ec_write(fan_select_offset, val) < 0) 7907 return false; 7908 7909 return true; 7910 } 7911 7912 /* 7913 * Call with fan_mutex held 7914 */ 7915 static void fan_update_desired_level(u8 status) 7916 { 7917 if ((status & 7918 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7919 if (status > 7) 7920 fan_control_desired_level = 7; 7921 else 7922 fan_control_desired_level = status; 7923 } 7924 } 7925 7926 static int fan_get_status(u8 *status) 7927 { 7928 u8 s; 7929 7930 /* TODO: 7931 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 7932 7933 switch (fan_status_access_mode) { 7934 case TPACPI_FAN_RD_ACPI_GFAN: { 7935 /* 570, 600e/x, 770e, 770x */ 7936 int res; 7937 7938 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 7939 return -EIO; 7940 7941 if (likely(status)) 7942 *status = res & 0x07; 7943 7944 break; 7945 } 7946 case TPACPI_FAN_RD_TPEC: 7947 /* all except 570, 600e/x, 770e, 770x */ 7948 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 7949 return -EIO; 7950 7951 if (likely(status)) { 7952 *status = s; 7953 fan_quirk1_handle(status); 7954 } 7955 7956 break; 7957 7958 default: 7959 return -ENXIO; 7960 } 7961 7962 return 0; 7963 } 7964 7965 static int fan_get_status_safe(u8 *status) 7966 { 7967 int rc; 7968 u8 s; 7969 7970 if (mutex_lock_killable(&fan_mutex)) 7971 return -ERESTARTSYS; 7972 rc = fan_get_status(&s); 7973 if (!rc) 7974 fan_update_desired_level(s); 7975 mutex_unlock(&fan_mutex); 7976 7977 if (status) 7978 *status = s; 7979 7980 return rc; 7981 } 7982 7983 static int fan_get_speed(unsigned int *speed) 7984 { 7985 u8 hi, lo; 7986 7987 switch (fan_status_access_mode) { 7988 case TPACPI_FAN_RD_TPEC: 7989 /* all except 570, 600e/x, 770e, 770x */ 7990 if (unlikely(!fan_select_fan1())) 7991 return -EIO; 7992 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 7993 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 7994 return -EIO; 7995 7996 if (likely(speed)) 7997 *speed = (hi << 8) | lo; 7998 7999 break; 8000 8001 default: 8002 return -ENXIO; 8003 } 8004 8005 return 0; 8006 } 8007 8008 static int fan2_get_speed(unsigned int *speed) 8009 { 8010 u8 hi, lo; 8011 bool rc; 8012 8013 switch (fan_status_access_mode) { 8014 case TPACPI_FAN_RD_TPEC: 8015 /* all except 570, 600e/x, 770e, 770x */ 8016 if (unlikely(!fan_select_fan2())) 8017 return -EIO; 8018 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8019 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8020 fan_select_fan1(); /* play it safe */ 8021 if (rc) 8022 return -EIO; 8023 8024 if (likely(speed)) 8025 *speed = (hi << 8) | lo; 8026 8027 break; 8028 8029 default: 8030 return -ENXIO; 8031 } 8032 8033 return 0; 8034 } 8035 8036 static int fan_set_level(int level) 8037 { 8038 if (!fan_control_allowed) 8039 return -EPERM; 8040 8041 switch (fan_control_access_mode) { 8042 case TPACPI_FAN_WR_ACPI_SFAN: 8043 if (level >= 0 && level <= 7) { 8044 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8045 return -EIO; 8046 } else 8047 return -EINVAL; 8048 break; 8049 8050 case TPACPI_FAN_WR_ACPI_FANS: 8051 case TPACPI_FAN_WR_TPEC: 8052 if (!(level & TP_EC_FAN_AUTO) && 8053 !(level & TP_EC_FAN_FULLSPEED) && 8054 ((level < 0) || (level > 7))) 8055 return -EINVAL; 8056 8057 /* safety net should the EC not support AUTO 8058 * or FULLSPEED mode bits and just ignore them */ 8059 if (level & TP_EC_FAN_FULLSPEED) 8060 level |= 7; /* safety min speed 7 */ 8061 else if (level & TP_EC_FAN_AUTO) 8062 level |= 4; /* safety min speed 4 */ 8063 8064 if (!acpi_ec_write(fan_status_offset, level)) 8065 return -EIO; 8066 else 8067 tp_features.fan_ctrl_status_undef = 0; 8068 break; 8069 8070 default: 8071 return -ENXIO; 8072 } 8073 8074 vdbg_printk(TPACPI_DBG_FAN, 8075 "fan control: set fan control register to 0x%02x\n", level); 8076 return 0; 8077 } 8078 8079 static int fan_set_level_safe(int level) 8080 { 8081 int rc; 8082 8083 if (!fan_control_allowed) 8084 return -EPERM; 8085 8086 if (mutex_lock_killable(&fan_mutex)) 8087 return -ERESTARTSYS; 8088 8089 if (level == TPACPI_FAN_LAST_LEVEL) 8090 level = fan_control_desired_level; 8091 8092 rc = fan_set_level(level); 8093 if (!rc) 8094 fan_update_desired_level(level); 8095 8096 mutex_unlock(&fan_mutex); 8097 return rc; 8098 } 8099 8100 static int fan_set_enable(void) 8101 { 8102 u8 s; 8103 int rc; 8104 8105 if (!fan_control_allowed) 8106 return -EPERM; 8107 8108 if (mutex_lock_killable(&fan_mutex)) 8109 return -ERESTARTSYS; 8110 8111 switch (fan_control_access_mode) { 8112 case TPACPI_FAN_WR_ACPI_FANS: 8113 case TPACPI_FAN_WR_TPEC: 8114 rc = fan_get_status(&s); 8115 if (rc < 0) 8116 break; 8117 8118 /* Don't go out of emergency fan mode */ 8119 if (s != 7) { 8120 s &= 0x07; 8121 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8122 } 8123 8124 if (!acpi_ec_write(fan_status_offset, s)) 8125 rc = -EIO; 8126 else { 8127 tp_features.fan_ctrl_status_undef = 0; 8128 rc = 0; 8129 } 8130 break; 8131 8132 case TPACPI_FAN_WR_ACPI_SFAN: 8133 rc = fan_get_status(&s); 8134 if (rc < 0) 8135 break; 8136 8137 s &= 0x07; 8138 8139 /* Set fan to at least level 4 */ 8140 s |= 4; 8141 8142 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8143 rc = -EIO; 8144 else 8145 rc = 0; 8146 break; 8147 8148 default: 8149 rc = -ENXIO; 8150 } 8151 8152 mutex_unlock(&fan_mutex); 8153 8154 if (!rc) 8155 vdbg_printk(TPACPI_DBG_FAN, 8156 "fan control: set fan control register to 0x%02x\n", 8157 s); 8158 return rc; 8159 } 8160 8161 static int fan_set_disable(void) 8162 { 8163 int rc; 8164 8165 if (!fan_control_allowed) 8166 return -EPERM; 8167 8168 if (mutex_lock_killable(&fan_mutex)) 8169 return -ERESTARTSYS; 8170 8171 rc = 0; 8172 switch (fan_control_access_mode) { 8173 case TPACPI_FAN_WR_ACPI_FANS: 8174 case TPACPI_FAN_WR_TPEC: 8175 if (!acpi_ec_write(fan_status_offset, 0x00)) 8176 rc = -EIO; 8177 else { 8178 fan_control_desired_level = 0; 8179 tp_features.fan_ctrl_status_undef = 0; 8180 } 8181 break; 8182 8183 case TPACPI_FAN_WR_ACPI_SFAN: 8184 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8185 rc = -EIO; 8186 else 8187 fan_control_desired_level = 0; 8188 break; 8189 8190 default: 8191 rc = -ENXIO; 8192 } 8193 8194 if (!rc) 8195 vdbg_printk(TPACPI_DBG_FAN, 8196 "fan control: set fan control register to 0\n"); 8197 8198 mutex_unlock(&fan_mutex); 8199 return rc; 8200 } 8201 8202 static int fan_set_speed(int speed) 8203 { 8204 int rc; 8205 8206 if (!fan_control_allowed) 8207 return -EPERM; 8208 8209 if (mutex_lock_killable(&fan_mutex)) 8210 return -ERESTARTSYS; 8211 8212 rc = 0; 8213 switch (fan_control_access_mode) { 8214 case TPACPI_FAN_WR_ACPI_FANS: 8215 if (speed >= 0 && speed <= 65535) { 8216 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8217 speed, speed, speed)) 8218 rc = -EIO; 8219 } else 8220 rc = -EINVAL; 8221 break; 8222 8223 default: 8224 rc = -ENXIO; 8225 } 8226 8227 mutex_unlock(&fan_mutex); 8228 return rc; 8229 } 8230 8231 static void fan_watchdog_reset(void) 8232 { 8233 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8234 return; 8235 8236 if (fan_watchdog_maxinterval > 0 && 8237 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8238 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8239 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8240 else 8241 cancel_delayed_work(&fan_watchdog_task); 8242 } 8243 8244 static void fan_watchdog_fire(struct work_struct *ignored) 8245 { 8246 int rc; 8247 8248 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8249 return; 8250 8251 pr_notice("fan watchdog: enabling fan\n"); 8252 rc = fan_set_enable(); 8253 if (rc < 0) { 8254 pr_err("fan watchdog: error %d while enabling fan, " 8255 "will try again later...\n", -rc); 8256 /* reschedule for later */ 8257 fan_watchdog_reset(); 8258 } 8259 } 8260 8261 /* 8262 * SYSFS fan layout: hwmon compatible (device) 8263 * 8264 * pwm*_enable: 8265 * 0: "disengaged" mode 8266 * 1: manual mode 8267 * 2: native EC "auto" mode (recommended, hardware default) 8268 * 8269 * pwm*: set speed in manual mode, ignored otherwise. 8270 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8271 * interpolation. 8272 * 8273 * fan*_input: tachometer reading, RPM 8274 * 8275 * 8276 * SYSFS fan layout: extensions 8277 * 8278 * fan_watchdog (driver): 8279 * fan watchdog interval in seconds, 0 disables (default), max 120 8280 */ 8281 8282 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8283 static ssize_t fan_pwm1_enable_show(struct device *dev, 8284 struct device_attribute *attr, 8285 char *buf) 8286 { 8287 int res, mode; 8288 u8 status; 8289 8290 res = fan_get_status_safe(&status); 8291 if (res) 8292 return res; 8293 8294 if (status & TP_EC_FAN_FULLSPEED) { 8295 mode = 0; 8296 } else if (status & TP_EC_FAN_AUTO) { 8297 mode = 2; 8298 } else 8299 mode = 1; 8300 8301 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8302 } 8303 8304 static ssize_t fan_pwm1_enable_store(struct device *dev, 8305 struct device_attribute *attr, 8306 const char *buf, size_t count) 8307 { 8308 unsigned long t; 8309 int res, level; 8310 8311 if (parse_strtoul(buf, 2, &t)) 8312 return -EINVAL; 8313 8314 tpacpi_disclose_usertask("hwmon pwm1_enable", 8315 "set fan mode to %lu\n", t); 8316 8317 switch (t) { 8318 case 0: 8319 level = TP_EC_FAN_FULLSPEED; 8320 break; 8321 case 1: 8322 level = TPACPI_FAN_LAST_LEVEL; 8323 break; 8324 case 2: 8325 level = TP_EC_FAN_AUTO; 8326 break; 8327 case 3: 8328 /* reserved for software-controlled auto mode */ 8329 return -ENOSYS; 8330 default: 8331 return -EINVAL; 8332 } 8333 8334 res = fan_set_level_safe(level); 8335 if (res == -ENXIO) 8336 return -EINVAL; 8337 else if (res < 0) 8338 return res; 8339 8340 fan_watchdog_reset(); 8341 8342 return count; 8343 } 8344 8345 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8346 fan_pwm1_enable_show, fan_pwm1_enable_store); 8347 8348 /* sysfs fan pwm1 ------------------------------------------------------ */ 8349 static ssize_t fan_pwm1_show(struct device *dev, 8350 struct device_attribute *attr, 8351 char *buf) 8352 { 8353 int res; 8354 u8 status; 8355 8356 res = fan_get_status_safe(&status); 8357 if (res) 8358 return res; 8359 8360 if ((status & 8361 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8362 status = fan_control_desired_level; 8363 8364 if (status > 7) 8365 status = 7; 8366 8367 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8368 } 8369 8370 static ssize_t fan_pwm1_store(struct device *dev, 8371 struct device_attribute *attr, 8372 const char *buf, size_t count) 8373 { 8374 unsigned long s; 8375 int rc; 8376 u8 status, newlevel; 8377 8378 if (parse_strtoul(buf, 255, &s)) 8379 return -EINVAL; 8380 8381 tpacpi_disclose_usertask("hwmon pwm1", 8382 "set fan speed to %lu\n", s); 8383 8384 /* scale down from 0-255 to 0-7 */ 8385 newlevel = (s >> 5) & 0x07; 8386 8387 if (mutex_lock_killable(&fan_mutex)) 8388 return -ERESTARTSYS; 8389 8390 rc = fan_get_status(&status); 8391 if (!rc && (status & 8392 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8393 rc = fan_set_level(newlevel); 8394 if (rc == -ENXIO) 8395 rc = -EINVAL; 8396 else if (!rc) { 8397 fan_update_desired_level(newlevel); 8398 fan_watchdog_reset(); 8399 } 8400 } 8401 8402 mutex_unlock(&fan_mutex); 8403 return (rc) ? rc : count; 8404 } 8405 8406 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8407 8408 /* sysfs fan fan1_input ------------------------------------------------ */ 8409 static ssize_t fan_fan1_input_show(struct device *dev, 8410 struct device_attribute *attr, 8411 char *buf) 8412 { 8413 int res; 8414 unsigned int speed; 8415 8416 res = fan_get_speed(&speed); 8417 if (res < 0) 8418 return res; 8419 8420 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8421 } 8422 8423 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8424 8425 /* sysfs fan fan2_input ------------------------------------------------ */ 8426 static ssize_t fan_fan2_input_show(struct device *dev, 8427 struct device_attribute *attr, 8428 char *buf) 8429 { 8430 int res; 8431 unsigned int speed; 8432 8433 res = fan2_get_speed(&speed); 8434 if (res < 0) 8435 return res; 8436 8437 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8438 } 8439 8440 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8441 8442 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8443 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 8444 char *buf) 8445 { 8446 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8447 } 8448 8449 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 8450 const char *buf, size_t count) 8451 { 8452 unsigned long t; 8453 8454 if (parse_strtoul(buf, 120, &t)) 8455 return -EINVAL; 8456 8457 if (!fan_control_allowed) 8458 return -EPERM; 8459 8460 fan_watchdog_maxinterval = t; 8461 fan_watchdog_reset(); 8462 8463 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8464 8465 return count; 8466 } 8467 8468 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 8469 fan_fan_watchdog_show, fan_fan_watchdog_store); 8470 8471 /* --------------------------------------------------------------------- */ 8472 static struct attribute *fan_attributes[] = { 8473 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8474 &dev_attr_fan1_input.attr, 8475 NULL, /* for fan2_input */ 8476 NULL 8477 }; 8478 8479 static const struct attribute_group fan_attr_group = { 8480 .attrs = fan_attributes, 8481 }; 8482 8483 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8484 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8485 8486 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 8487 { .vendor = PCI_VENDOR_ID_IBM, \ 8488 .bios = TPACPI_MATCH_ANY, \ 8489 .ec = TPID(__id1, __id2), \ 8490 .quirks = __quirks } 8491 8492 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 8493 { .vendor = PCI_VENDOR_ID_LENOVO, \ 8494 .bios = TPACPI_MATCH_ANY, \ 8495 .ec = TPID(__id1, __id2), \ 8496 .quirks = __quirks } 8497 8498 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8499 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 8500 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 8501 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 8502 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 8503 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 8504 }; 8505 8506 #undef TPACPI_FAN_QL 8507 #undef TPACPI_FAN_QI 8508 8509 static int __init fan_init(struct ibm_init_struct *iibm) 8510 { 8511 int rc; 8512 unsigned long quirks; 8513 8514 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8515 "initializing fan subdriver\n"); 8516 8517 mutex_init(&fan_mutex); 8518 fan_status_access_mode = TPACPI_FAN_NONE; 8519 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8520 fan_control_commands = 0; 8521 fan_watchdog_maxinterval = 0; 8522 tp_features.fan_ctrl_status_undef = 0; 8523 tp_features.second_fan = 0; 8524 fan_control_desired_level = 7; 8525 8526 if (tpacpi_is_ibm()) { 8527 TPACPI_ACPIHANDLE_INIT(fans); 8528 TPACPI_ACPIHANDLE_INIT(gfan); 8529 TPACPI_ACPIHANDLE_INIT(sfan); 8530 } 8531 8532 quirks = tpacpi_check_quirks(fan_quirk_table, 8533 ARRAY_SIZE(fan_quirk_table)); 8534 8535 if (gfan_handle) { 8536 /* 570, 600e/x, 770e, 770x */ 8537 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8538 } else { 8539 /* all other ThinkPads: note that even old-style 8540 * ThinkPad ECs supports the fan control register */ 8541 if (likely(acpi_ec_read(fan_status_offset, 8542 &fan_control_initial_status))) { 8543 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8544 if (quirks & TPACPI_FAN_Q1) 8545 fan_quirk1_setup(); 8546 if (quirks & TPACPI_FAN_2FAN) { 8547 tp_features.second_fan = 1; 8548 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8549 "secondary fan support enabled\n"); 8550 } 8551 } else { 8552 pr_err("ThinkPad ACPI EC access misbehaving, " 8553 "fan status and control unavailable\n"); 8554 return 1; 8555 } 8556 } 8557 8558 if (sfan_handle) { 8559 /* 570, 770x-JL */ 8560 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8561 fan_control_commands |= 8562 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8563 } else { 8564 if (!gfan_handle) { 8565 /* gfan without sfan means no fan control */ 8566 /* all other models implement TP EC 0x2f control */ 8567 8568 if (fans_handle) { 8569 /* X31, X40, X41 */ 8570 fan_control_access_mode = 8571 TPACPI_FAN_WR_ACPI_FANS; 8572 fan_control_commands |= 8573 TPACPI_FAN_CMD_SPEED | 8574 TPACPI_FAN_CMD_LEVEL | 8575 TPACPI_FAN_CMD_ENABLE; 8576 } else { 8577 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8578 fan_control_commands |= 8579 TPACPI_FAN_CMD_LEVEL | 8580 TPACPI_FAN_CMD_ENABLE; 8581 } 8582 } 8583 } 8584 8585 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8586 "fan is %s, modes %d, %d\n", 8587 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8588 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8589 fan_status_access_mode, fan_control_access_mode); 8590 8591 /* fan control master switch */ 8592 if (!fan_control_allowed) { 8593 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8594 fan_control_commands = 0; 8595 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8596 "fan control features disabled by parameter\n"); 8597 } 8598 8599 /* update fan_control_desired_level */ 8600 if (fan_status_access_mode != TPACPI_FAN_NONE) 8601 fan_get_status_safe(NULL); 8602 8603 if (fan_status_access_mode != TPACPI_FAN_NONE || 8604 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8605 if (tp_features.second_fan) { 8606 /* attach second fan tachometer */ 8607 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8608 &dev_attr_fan2_input.attr; 8609 } 8610 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8611 &fan_attr_group); 8612 if (rc < 0) 8613 return rc; 8614 8615 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8616 &driver_attr_fan_watchdog); 8617 if (rc < 0) { 8618 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8619 &fan_attr_group); 8620 return rc; 8621 } 8622 return 0; 8623 } else 8624 return 1; 8625 } 8626 8627 static void fan_exit(void) 8628 { 8629 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8630 "cancelling any pending fan watchdog tasks\n"); 8631 8632 /* FIXME: can we really do this unconditionally? */ 8633 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8634 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8635 &driver_attr_fan_watchdog); 8636 8637 cancel_delayed_work(&fan_watchdog_task); 8638 flush_workqueue(tpacpi_wq); 8639 } 8640 8641 static void fan_suspend(void) 8642 { 8643 int rc; 8644 8645 if (!fan_control_allowed) 8646 return; 8647 8648 /* Store fan status in cache */ 8649 fan_control_resume_level = 0; 8650 rc = fan_get_status_safe(&fan_control_resume_level); 8651 if (rc < 0) 8652 pr_notice("failed to read fan level for later " 8653 "restore during resume: %d\n", rc); 8654 8655 /* if it is undefined, don't attempt to restore it. 8656 * KEEP THIS LAST */ 8657 if (tp_features.fan_ctrl_status_undef) 8658 fan_control_resume_level = 0; 8659 } 8660 8661 static void fan_resume(void) 8662 { 8663 u8 current_level = 7; 8664 bool do_set = false; 8665 int rc; 8666 8667 /* DSDT *always* updates status on resume */ 8668 tp_features.fan_ctrl_status_undef = 0; 8669 8670 if (!fan_control_allowed || 8671 !fan_control_resume_level || 8672 (fan_get_status_safe(¤t_level) < 0)) 8673 return; 8674 8675 switch (fan_control_access_mode) { 8676 case TPACPI_FAN_WR_ACPI_SFAN: 8677 /* never decrease fan level */ 8678 do_set = (fan_control_resume_level > current_level); 8679 break; 8680 case TPACPI_FAN_WR_ACPI_FANS: 8681 case TPACPI_FAN_WR_TPEC: 8682 /* never decrease fan level, scale is: 8683 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8684 * 8685 * We expect the firmware to set either 7 or AUTO, but we 8686 * handle FULLSPEED out of paranoia. 8687 * 8688 * So, we can safely only restore FULLSPEED or 7, anything 8689 * else could slow the fan. Restoring AUTO is useless, at 8690 * best that's exactly what the DSDT already set (it is the 8691 * slower it uses). 8692 * 8693 * Always keep in mind that the DSDT *will* have set the 8694 * fans to what the vendor supposes is the best level. We 8695 * muck with it only to speed the fan up. 8696 */ 8697 if (fan_control_resume_level != 7 && 8698 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8699 return; 8700 else 8701 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8702 (current_level != fan_control_resume_level); 8703 break; 8704 default: 8705 return; 8706 } 8707 if (do_set) { 8708 pr_notice("restoring fan level to 0x%02x\n", 8709 fan_control_resume_level); 8710 rc = fan_set_level_safe(fan_control_resume_level); 8711 if (rc < 0) 8712 pr_notice("failed to restore fan level: %d\n", rc); 8713 } 8714 } 8715 8716 static int fan_read(struct seq_file *m) 8717 { 8718 int rc; 8719 u8 status; 8720 unsigned int speed = 0; 8721 8722 switch (fan_status_access_mode) { 8723 case TPACPI_FAN_RD_ACPI_GFAN: 8724 /* 570, 600e/x, 770e, 770x */ 8725 rc = fan_get_status_safe(&status); 8726 if (rc < 0) 8727 return rc; 8728 8729 seq_printf(m, "status:\t\t%s\n" 8730 "level:\t\t%d\n", 8731 (status != 0) ? "enabled" : "disabled", status); 8732 break; 8733 8734 case TPACPI_FAN_RD_TPEC: 8735 /* all except 570, 600e/x, 770e, 770x */ 8736 rc = fan_get_status_safe(&status); 8737 if (rc < 0) 8738 return rc; 8739 8740 seq_printf(m, "status:\t\t%s\n", 8741 (status != 0) ? "enabled" : "disabled"); 8742 8743 rc = fan_get_speed(&speed); 8744 if (rc < 0) 8745 return rc; 8746 8747 seq_printf(m, "speed:\t\t%d\n", speed); 8748 8749 if (status & TP_EC_FAN_FULLSPEED) 8750 /* Disengaged mode takes precedence */ 8751 seq_printf(m, "level:\t\tdisengaged\n"); 8752 else if (status & TP_EC_FAN_AUTO) 8753 seq_printf(m, "level:\t\tauto\n"); 8754 else 8755 seq_printf(m, "level:\t\t%d\n", status); 8756 break; 8757 8758 case TPACPI_FAN_NONE: 8759 default: 8760 seq_printf(m, "status:\t\tnot supported\n"); 8761 } 8762 8763 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8764 seq_printf(m, "commands:\tlevel <level>"); 8765 8766 switch (fan_control_access_mode) { 8767 case TPACPI_FAN_WR_ACPI_SFAN: 8768 seq_printf(m, " (<level> is 0-7)\n"); 8769 break; 8770 8771 default: 8772 seq_printf(m, " (<level> is 0-7, " 8773 "auto, disengaged, full-speed)\n"); 8774 break; 8775 } 8776 } 8777 8778 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8779 seq_printf(m, "commands:\tenable, disable\n" 8780 "commands:\twatchdog <timeout> (<timeout> " 8781 "is 0 (off), 1-120 (seconds))\n"); 8782 8783 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8784 seq_printf(m, "commands:\tspeed <speed>" 8785 " (<speed> is 0-65535)\n"); 8786 8787 return 0; 8788 } 8789 8790 static int fan_write_cmd_level(const char *cmd, int *rc) 8791 { 8792 int level; 8793 8794 if (strlencmp(cmd, "level auto") == 0) 8795 level = TP_EC_FAN_AUTO; 8796 else if ((strlencmp(cmd, "level disengaged") == 0) | 8797 (strlencmp(cmd, "level full-speed") == 0)) 8798 level = TP_EC_FAN_FULLSPEED; 8799 else if (sscanf(cmd, "level %d", &level) != 1) 8800 return 0; 8801 8802 *rc = fan_set_level_safe(level); 8803 if (*rc == -ENXIO) 8804 pr_err("level command accepted for unsupported access mode %d\n", 8805 fan_control_access_mode); 8806 else if (!*rc) 8807 tpacpi_disclose_usertask("procfs fan", 8808 "set level to %d\n", level); 8809 8810 return 1; 8811 } 8812 8813 static int fan_write_cmd_enable(const char *cmd, int *rc) 8814 { 8815 if (strlencmp(cmd, "enable") != 0) 8816 return 0; 8817 8818 *rc = fan_set_enable(); 8819 if (*rc == -ENXIO) 8820 pr_err("enable command accepted for unsupported access mode %d\n", 8821 fan_control_access_mode); 8822 else if (!*rc) 8823 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8824 8825 return 1; 8826 } 8827 8828 static int fan_write_cmd_disable(const char *cmd, int *rc) 8829 { 8830 if (strlencmp(cmd, "disable") != 0) 8831 return 0; 8832 8833 *rc = fan_set_disable(); 8834 if (*rc == -ENXIO) 8835 pr_err("disable command accepted for unsupported access mode %d\n", 8836 fan_control_access_mode); 8837 else if (!*rc) 8838 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8839 8840 return 1; 8841 } 8842 8843 static int fan_write_cmd_speed(const char *cmd, int *rc) 8844 { 8845 int speed; 8846 8847 /* TODO: 8848 * Support speed <low> <medium> <high> ? */ 8849 8850 if (sscanf(cmd, "speed %d", &speed) != 1) 8851 return 0; 8852 8853 *rc = fan_set_speed(speed); 8854 if (*rc == -ENXIO) 8855 pr_err("speed command accepted for unsupported access mode %d\n", 8856 fan_control_access_mode); 8857 else if (!*rc) 8858 tpacpi_disclose_usertask("procfs fan", 8859 "set speed to %d\n", speed); 8860 8861 return 1; 8862 } 8863 8864 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8865 { 8866 int interval; 8867 8868 if (sscanf(cmd, "watchdog %d", &interval) != 1) 8869 return 0; 8870 8871 if (interval < 0 || interval > 120) 8872 *rc = -EINVAL; 8873 else { 8874 fan_watchdog_maxinterval = interval; 8875 tpacpi_disclose_usertask("procfs fan", 8876 "set watchdog timer to %d\n", 8877 interval); 8878 } 8879 8880 return 1; 8881 } 8882 8883 static int fan_write(char *buf) 8884 { 8885 char *cmd; 8886 int rc = 0; 8887 8888 while (!rc && (cmd = next_cmd(&buf))) { 8889 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 8890 fan_write_cmd_level(cmd, &rc)) && 8891 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 8892 (fan_write_cmd_enable(cmd, &rc) || 8893 fan_write_cmd_disable(cmd, &rc) || 8894 fan_write_cmd_watchdog(cmd, &rc))) && 8895 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 8896 fan_write_cmd_speed(cmd, &rc)) 8897 ) 8898 rc = -EINVAL; 8899 else if (!rc) 8900 fan_watchdog_reset(); 8901 } 8902 8903 return rc; 8904 } 8905 8906 static struct ibm_struct fan_driver_data = { 8907 .name = "fan", 8908 .read = fan_read, 8909 .write = fan_write, 8910 .exit = fan_exit, 8911 .suspend = fan_suspend, 8912 .resume = fan_resume, 8913 }; 8914 8915 /************************************************************************* 8916 * Mute LED subdriver 8917 */ 8918 8919 8920 struct tp_led_table { 8921 acpi_string name; 8922 int on_value; 8923 int off_value; 8924 int state; 8925 }; 8926 8927 static struct tp_led_table led_tables[] = { 8928 [TPACPI_LED_MUTE] = { 8929 .name = "SSMS", 8930 .on_value = 1, 8931 .off_value = 0, 8932 }, 8933 [TPACPI_LED_MICMUTE] = { 8934 .name = "MMTS", 8935 .on_value = 2, 8936 .off_value = 0, 8937 }, 8938 }; 8939 8940 static int mute_led_on_off(struct tp_led_table *t, bool state) 8941 { 8942 acpi_handle temp; 8943 int output; 8944 8945 if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) { 8946 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 8947 return -EIO; 8948 } 8949 8950 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 8951 state ? t->on_value : t->off_value)) 8952 return -EIO; 8953 8954 t->state = state; 8955 return state; 8956 } 8957 8958 int tpacpi_led_set(int whichled, bool on) 8959 { 8960 struct tp_led_table *t; 8961 8962 if (whichled < 0 || whichled >= TPACPI_LED_MAX) 8963 return -EINVAL; 8964 8965 t = &led_tables[whichled]; 8966 if (t->state < 0 || t->state == on) 8967 return t->state; 8968 return mute_led_on_off(t, on); 8969 } 8970 EXPORT_SYMBOL_GPL(tpacpi_led_set); 8971 8972 static int mute_led_init(struct ibm_init_struct *iibm) 8973 { 8974 acpi_handle temp; 8975 int i; 8976 8977 for (i = 0; i < TPACPI_LED_MAX; i++) { 8978 struct tp_led_table *t = &led_tables[i]; 8979 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) 8980 mute_led_on_off(t, false); 8981 else 8982 t->state = -ENODEV; 8983 } 8984 return 0; 8985 } 8986 8987 static void mute_led_exit(void) 8988 { 8989 int i; 8990 8991 for (i = 0; i < TPACPI_LED_MAX; i++) 8992 tpacpi_led_set(i, false); 8993 } 8994 8995 static void mute_led_resume(void) 8996 { 8997 int i; 8998 8999 for (i = 0; i < TPACPI_LED_MAX; i++) { 9000 struct tp_led_table *t = &led_tables[i]; 9001 if (t->state >= 0) 9002 mute_led_on_off(t, t->state); 9003 } 9004 } 9005 9006 static struct ibm_struct mute_led_driver_data = { 9007 .name = "mute_led", 9008 .exit = mute_led_exit, 9009 .resume = mute_led_resume, 9010 }; 9011 9012 /**************************************************************************** 9013 **************************************************************************** 9014 * 9015 * Infrastructure 9016 * 9017 **************************************************************************** 9018 ****************************************************************************/ 9019 9020 /* 9021 * HKEY event callout for other subdrivers go here 9022 * (yes, it is ugly, but it is quick, safe, and gets the job done 9023 */ 9024 static void tpacpi_driver_event(const unsigned int hkey_event) 9025 { 9026 if (ibm_backlight_device) { 9027 switch (hkey_event) { 9028 case TP_HKEY_EV_BRGHT_UP: 9029 case TP_HKEY_EV_BRGHT_DOWN: 9030 tpacpi_brightness_notify_change(); 9031 } 9032 } 9033 if (alsa_card) { 9034 switch (hkey_event) { 9035 case TP_HKEY_EV_VOL_UP: 9036 case TP_HKEY_EV_VOL_DOWN: 9037 case TP_HKEY_EV_VOL_MUTE: 9038 volume_alsa_notify_change(); 9039 } 9040 } 9041 } 9042 9043 static void hotkey_driver_event(const unsigned int scancode) 9044 { 9045 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9046 } 9047 9048 /* sysfs name ---------------------------------------------------------- */ 9049 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 9050 struct device_attribute *attr, 9051 char *buf) 9052 { 9053 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 9054 } 9055 9056 static DEVICE_ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 9057 9058 /* --------------------------------------------------------------------- */ 9059 9060 /* /proc support */ 9061 static struct proc_dir_entry *proc_dir; 9062 9063 /* 9064 * Module and infrastructure proble, init and exit handling 9065 */ 9066 9067 static bool force_load; 9068 9069 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9070 static const char * __init str_supported(int is_supported) 9071 { 9072 static char text_unsupported[] __initdata = "not supported"; 9073 9074 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9075 } 9076 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9077 9078 static void ibm_exit(struct ibm_struct *ibm) 9079 { 9080 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9081 9082 list_del_init(&ibm->all_drivers); 9083 9084 if (ibm->flags.acpi_notify_installed) { 9085 dbg_printk(TPACPI_DBG_EXIT, 9086 "%s: acpi_remove_notify_handler\n", ibm->name); 9087 BUG_ON(!ibm->acpi); 9088 acpi_remove_notify_handler(*ibm->acpi->handle, 9089 ibm->acpi->type, 9090 dispatch_acpi_notify); 9091 ibm->flags.acpi_notify_installed = 0; 9092 } 9093 9094 if (ibm->flags.proc_created) { 9095 dbg_printk(TPACPI_DBG_EXIT, 9096 "%s: remove_proc_entry\n", ibm->name); 9097 remove_proc_entry(ibm->name, proc_dir); 9098 ibm->flags.proc_created = 0; 9099 } 9100 9101 if (ibm->flags.acpi_driver_registered) { 9102 dbg_printk(TPACPI_DBG_EXIT, 9103 "%s: acpi_bus_unregister_driver\n", ibm->name); 9104 BUG_ON(!ibm->acpi); 9105 acpi_bus_unregister_driver(ibm->acpi->driver); 9106 kfree(ibm->acpi->driver); 9107 ibm->acpi->driver = NULL; 9108 ibm->flags.acpi_driver_registered = 0; 9109 } 9110 9111 if (ibm->flags.init_called && ibm->exit) { 9112 ibm->exit(); 9113 ibm->flags.init_called = 0; 9114 } 9115 9116 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9117 } 9118 9119 static int __init ibm_init(struct ibm_init_struct *iibm) 9120 { 9121 int ret; 9122 struct ibm_struct *ibm = iibm->data; 9123 struct proc_dir_entry *entry; 9124 9125 BUG_ON(ibm == NULL); 9126 9127 INIT_LIST_HEAD(&ibm->all_drivers); 9128 9129 if (ibm->flags.experimental && !experimental) 9130 return 0; 9131 9132 dbg_printk(TPACPI_DBG_INIT, 9133 "probing for %s\n", ibm->name); 9134 9135 if (iibm->init) { 9136 ret = iibm->init(iibm); 9137 if (ret > 0) 9138 return 0; /* probe failed */ 9139 if (ret) 9140 return ret; 9141 9142 ibm->flags.init_called = 1; 9143 } 9144 9145 if (ibm->acpi) { 9146 if (ibm->acpi->hid) { 9147 ret = register_tpacpi_subdriver(ibm); 9148 if (ret) 9149 goto err_out; 9150 } 9151 9152 if (ibm->acpi->notify) { 9153 ret = setup_acpi_notify(ibm); 9154 if (ret == -ENODEV) { 9155 pr_notice("disabling subdriver %s\n", 9156 ibm->name); 9157 ret = 0; 9158 goto err_out; 9159 } 9160 if (ret < 0) 9161 goto err_out; 9162 } 9163 } 9164 9165 dbg_printk(TPACPI_DBG_INIT, 9166 "%s installed\n", ibm->name); 9167 9168 if (ibm->read) { 9169 umode_t mode = iibm->base_procfs_mode; 9170 9171 if (!mode) 9172 mode = S_IRUGO; 9173 if (ibm->write) 9174 mode |= S_IWUSR; 9175 entry = proc_create_data(ibm->name, mode, proc_dir, 9176 &dispatch_proc_fops, ibm); 9177 if (!entry) { 9178 pr_err("unable to create proc entry %s\n", ibm->name); 9179 ret = -ENODEV; 9180 goto err_out; 9181 } 9182 ibm->flags.proc_created = 1; 9183 } 9184 9185 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9186 9187 return 0; 9188 9189 err_out: 9190 dbg_printk(TPACPI_DBG_INIT, 9191 "%s: at error exit path with result %d\n", 9192 ibm->name, ret); 9193 9194 ibm_exit(ibm); 9195 return (ret < 0) ? ret : 0; 9196 } 9197 9198 /* Probing */ 9199 9200 static bool __pure __init tpacpi_is_fw_digit(const char c) 9201 { 9202 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 9203 } 9204 9205 static bool __pure __init tpacpi_is_valid_fw_id(const char * const s, 9206 const char t) 9207 { 9208 /* 9209 * Most models: xxyTkkWW (#.##c) 9210 * Ancient 570/600 and -SL lacks (#.##c) 9211 */ 9212 if (s && strlen(s) >= 8 && 9213 tpacpi_is_fw_digit(s[0]) && 9214 tpacpi_is_fw_digit(s[1]) && 9215 s[2] == t && 9216 (s[3] == 'T' || s[3] == 'N') && 9217 tpacpi_is_fw_digit(s[4]) && 9218 tpacpi_is_fw_digit(s[5])) 9219 return true; 9220 9221 /* New models: xxxyTkkW (#.##c); T550 and some others */ 9222 return s && strlen(s) >= 8 && 9223 tpacpi_is_fw_digit(s[0]) && 9224 tpacpi_is_fw_digit(s[1]) && 9225 tpacpi_is_fw_digit(s[2]) && 9226 s[3] == t && 9227 (s[4] == 'T' || s[4] == 'N') && 9228 tpacpi_is_fw_digit(s[5]) && 9229 tpacpi_is_fw_digit(s[6]); 9230 } 9231 9232 /* returns 0 - probe ok, or < 0 - probe error. 9233 * Probe ok doesn't mean thinkpad found. 9234 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 9235 static int __must_check __init get_thinkpad_model_data( 9236 struct thinkpad_id_data *tp) 9237 { 9238 const struct dmi_device *dev = NULL; 9239 char ec_fw_string[18]; 9240 char const *s; 9241 9242 if (!tp) 9243 return -EINVAL; 9244 9245 memset(tp, 0, sizeof(*tp)); 9246 9247 if (dmi_name_in_vendors("IBM")) 9248 tp->vendor = PCI_VENDOR_ID_IBM; 9249 else if (dmi_name_in_vendors("LENOVO")) 9250 tp->vendor = PCI_VENDOR_ID_LENOVO; 9251 else 9252 return 0; 9253 9254 s = dmi_get_system_info(DMI_BIOS_VERSION); 9255 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 9256 if (s && !tp->bios_version_str) 9257 return -ENOMEM; 9258 9259 /* Really ancient ThinkPad 240X will fail this, which is fine */ 9260 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') || 9261 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C'))) 9262 return 0; 9263 9264 tp->bios_model = tp->bios_version_str[0] 9265 | (tp->bios_version_str[1] << 8); 9266 tp->bios_release = (tp->bios_version_str[4] << 8) 9267 | tp->bios_version_str[5]; 9268 9269 /* 9270 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 9271 * X32 or newer, all Z series; Some models must have an 9272 * up-to-date BIOS or they will not be detected. 9273 * 9274 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9275 */ 9276 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 9277 if (sscanf(dev->name, 9278 "IBM ThinkPad Embedded Controller -[%17c", 9279 ec_fw_string) == 1) { 9280 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 9281 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 9282 9283 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 9284 if (!tp->ec_version_str) 9285 return -ENOMEM; 9286 9287 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 9288 tp->ec_model = ec_fw_string[0] 9289 | (ec_fw_string[1] << 8); 9290 tp->ec_release = (ec_fw_string[4] << 8) 9291 | ec_fw_string[5]; 9292 } else { 9293 pr_notice("ThinkPad firmware release %s " 9294 "doesn't match the known patterns\n", 9295 ec_fw_string); 9296 pr_notice("please report this to %s\n", 9297 TPACPI_MAIL); 9298 } 9299 break; 9300 } 9301 } 9302 9303 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 9304 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 9305 tp->model_str = kstrdup(s, GFP_KERNEL); 9306 if (!tp->model_str) 9307 return -ENOMEM; 9308 } else { 9309 s = dmi_get_system_info(DMI_BIOS_VENDOR); 9310 if (s && !(strncasecmp(s, "Lenovo", 6))) { 9311 tp->model_str = kstrdup(s, GFP_KERNEL); 9312 if (!tp->model_str) 9313 return -ENOMEM; 9314 } 9315 } 9316 9317 s = dmi_get_system_info(DMI_PRODUCT_NAME); 9318 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 9319 if (s && !tp->nummodel_str) 9320 return -ENOMEM; 9321 9322 return 0; 9323 } 9324 9325 static int __init probe_for_thinkpad(void) 9326 { 9327 int is_thinkpad; 9328 9329 if (acpi_disabled) 9330 return -ENODEV; 9331 9332 /* It would be dangerous to run the driver in this case */ 9333 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 9334 return -ENODEV; 9335 9336 /* 9337 * Non-ancient models have better DMI tagging, but very old models 9338 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 9339 */ 9340 is_thinkpad = (thinkpad_id.model_str != NULL) || 9341 (thinkpad_id.ec_model != 0) || 9342 tpacpi_is_fw_known(); 9343 9344 /* The EC handler is required */ 9345 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 9346 if (!ec_handle) { 9347 if (is_thinkpad) 9348 pr_err("Not yet supported ThinkPad detected!\n"); 9349 return -ENODEV; 9350 } 9351 9352 if (!is_thinkpad && !force_load) 9353 return -ENODEV; 9354 9355 return 0; 9356 } 9357 9358 static void __init thinkpad_acpi_init_banner(void) 9359 { 9360 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 9361 pr_info("%s\n", TPACPI_URL); 9362 9363 pr_info("ThinkPad BIOS %s, EC %s\n", 9364 (thinkpad_id.bios_version_str) ? 9365 thinkpad_id.bios_version_str : "unknown", 9366 (thinkpad_id.ec_version_str) ? 9367 thinkpad_id.ec_version_str : "unknown"); 9368 9369 BUG_ON(!thinkpad_id.vendor); 9370 9371 if (thinkpad_id.model_str) 9372 pr_info("%s %s, model %s\n", 9373 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 9374 "IBM" : ((thinkpad_id.vendor == 9375 PCI_VENDOR_ID_LENOVO) ? 9376 "Lenovo" : "Unknown vendor"), 9377 thinkpad_id.model_str, 9378 (thinkpad_id.nummodel_str) ? 9379 thinkpad_id.nummodel_str : "unknown"); 9380 } 9381 9382 /* Module init, exit, parameters */ 9383 9384 static struct ibm_init_struct ibms_init[] __initdata = { 9385 { 9386 .data = &thinkpad_acpi_driver_data, 9387 }, 9388 { 9389 .init = hotkey_init, 9390 .data = &hotkey_driver_data, 9391 }, 9392 { 9393 .init = bluetooth_init, 9394 .data = &bluetooth_driver_data, 9395 }, 9396 { 9397 .init = wan_init, 9398 .data = &wan_driver_data, 9399 }, 9400 { 9401 .init = uwb_init, 9402 .data = &uwb_driver_data, 9403 }, 9404 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 9405 { 9406 .init = video_init, 9407 .base_procfs_mode = S_IRUSR, 9408 .data = &video_driver_data, 9409 }, 9410 #endif 9411 { 9412 .init = kbdlight_init, 9413 .data = &kbdlight_driver_data, 9414 }, 9415 { 9416 .init = light_init, 9417 .data = &light_driver_data, 9418 }, 9419 { 9420 .init = cmos_init, 9421 .data = &cmos_driver_data, 9422 }, 9423 { 9424 .init = led_init, 9425 .data = &led_driver_data, 9426 }, 9427 { 9428 .init = beep_init, 9429 .data = &beep_driver_data, 9430 }, 9431 { 9432 .init = thermal_init, 9433 .data = &thermal_driver_data, 9434 }, 9435 { 9436 .init = brightness_init, 9437 .data = &brightness_driver_data, 9438 }, 9439 { 9440 .init = volume_init, 9441 .data = &volume_driver_data, 9442 }, 9443 { 9444 .init = fan_init, 9445 .data = &fan_driver_data, 9446 }, 9447 { 9448 .init = mute_led_init, 9449 .data = &mute_led_driver_data, 9450 }, 9451 }; 9452 9453 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 9454 { 9455 unsigned int i; 9456 struct ibm_struct *ibm; 9457 9458 if (!kp || !kp->name || !val) 9459 return -EINVAL; 9460 9461 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9462 ibm = ibms_init[i].data; 9463 WARN_ON(ibm == NULL); 9464 9465 if (!ibm || !ibm->name) 9466 continue; 9467 9468 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 9469 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 9470 return -ENOSPC; 9471 strcpy(ibms_init[i].param, val); 9472 strcat(ibms_init[i].param, ","); 9473 return 0; 9474 } 9475 } 9476 9477 return -EINVAL; 9478 } 9479 9480 module_param(experimental, int, 0444); 9481 MODULE_PARM_DESC(experimental, 9482 "Enables experimental features when non-zero"); 9483 9484 module_param_named(debug, dbg_level, uint, 0); 9485 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 9486 9487 module_param(force_load, bool, 0444); 9488 MODULE_PARM_DESC(force_load, 9489 "Attempts to load the driver even on a " 9490 "mis-identified ThinkPad when true"); 9491 9492 module_param_named(fan_control, fan_control_allowed, bool, 0444); 9493 MODULE_PARM_DESC(fan_control, 9494 "Enables setting fan parameters features when true"); 9495 9496 module_param_named(brightness_mode, brightness_mode, uint, 0444); 9497 MODULE_PARM_DESC(brightness_mode, 9498 "Selects brightness control strategy: " 9499 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 9500 9501 module_param(brightness_enable, uint, 0444); 9502 MODULE_PARM_DESC(brightness_enable, 9503 "Enables backlight control when 1, disables when 0"); 9504 9505 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 9506 module_param_named(volume_mode, volume_mode, uint, 0444); 9507 MODULE_PARM_DESC(volume_mode, 9508 "Selects volume control strategy: " 9509 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 9510 9511 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 9512 MODULE_PARM_DESC(volume_capabilities, 9513 "Selects the mixer capabilites: " 9514 "0=auto, 1=volume and mute, 2=mute only"); 9515 9516 module_param_named(volume_control, volume_control_allowed, bool, 0444); 9517 MODULE_PARM_DESC(volume_control, 9518 "Enables software override for the console audio " 9519 "control when true"); 9520 9521 module_param_named(software_mute, software_mute_requested, bool, 0444); 9522 MODULE_PARM_DESC(software_mute, 9523 "Request full software mute control"); 9524 9525 /* ALSA module API parameters */ 9526 module_param_named(index, alsa_index, int, 0444); 9527 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 9528 module_param_named(id, alsa_id, charp, 0444); 9529 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 9530 module_param_named(enable, alsa_enable, bool, 0444); 9531 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 9532 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 9533 9534 #define TPACPI_PARAM(feature) \ 9535 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 9536 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 9537 "at module load, see documentation") 9538 9539 TPACPI_PARAM(hotkey); 9540 TPACPI_PARAM(bluetooth); 9541 TPACPI_PARAM(video); 9542 TPACPI_PARAM(light); 9543 TPACPI_PARAM(cmos); 9544 TPACPI_PARAM(led); 9545 TPACPI_PARAM(beep); 9546 TPACPI_PARAM(brightness); 9547 TPACPI_PARAM(volume); 9548 TPACPI_PARAM(fan); 9549 9550 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 9551 module_param(dbg_wlswemul, uint, 0444); 9552 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 9553 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 9554 MODULE_PARM_DESC(wlsw_state, 9555 "Initial state of the emulated WLSW switch"); 9556 9557 module_param(dbg_bluetoothemul, uint, 0444); 9558 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 9559 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 9560 MODULE_PARM_DESC(bluetooth_state, 9561 "Initial state of the emulated bluetooth switch"); 9562 9563 module_param(dbg_wwanemul, uint, 0444); 9564 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 9565 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 9566 MODULE_PARM_DESC(wwan_state, 9567 "Initial state of the emulated WWAN switch"); 9568 9569 module_param(dbg_uwbemul, uint, 0444); 9570 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 9571 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 9572 MODULE_PARM_DESC(uwb_state, 9573 "Initial state of the emulated UWB switch"); 9574 #endif 9575 9576 static void thinkpad_acpi_module_exit(void) 9577 { 9578 struct ibm_struct *ibm, *itmp; 9579 9580 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 9581 9582 list_for_each_entry_safe_reverse(ibm, itmp, 9583 &tpacpi_all_drivers, 9584 all_drivers) { 9585 ibm_exit(ibm); 9586 } 9587 9588 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 9589 9590 if (tpacpi_inputdev) { 9591 if (tp_features.input_device_registered) 9592 input_unregister_device(tpacpi_inputdev); 9593 else 9594 input_free_device(tpacpi_inputdev); 9595 kfree(hotkey_keycode_map); 9596 } 9597 9598 if (tpacpi_hwmon) 9599 hwmon_device_unregister(tpacpi_hwmon); 9600 9601 if (tp_features.sensors_pdev_attrs_registered) 9602 device_remove_file(&tpacpi_sensors_pdev->dev, &dev_attr_name); 9603 if (tpacpi_sensors_pdev) 9604 platform_device_unregister(tpacpi_sensors_pdev); 9605 if (tpacpi_pdev) 9606 platform_device_unregister(tpacpi_pdev); 9607 9608 if (tp_features.sensors_pdrv_attrs_registered) 9609 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 9610 if (tp_features.platform_drv_attrs_registered) 9611 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 9612 9613 if (tp_features.sensors_pdrv_registered) 9614 platform_driver_unregister(&tpacpi_hwmon_pdriver); 9615 9616 if (tp_features.platform_drv_registered) 9617 platform_driver_unregister(&tpacpi_pdriver); 9618 9619 if (proc_dir) 9620 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 9621 9622 if (tpacpi_wq) 9623 destroy_workqueue(tpacpi_wq); 9624 9625 kfree(thinkpad_id.bios_version_str); 9626 kfree(thinkpad_id.ec_version_str); 9627 kfree(thinkpad_id.model_str); 9628 kfree(thinkpad_id.nummodel_str); 9629 } 9630 9631 9632 static int __init thinkpad_acpi_module_init(void) 9633 { 9634 int ret, i; 9635 9636 tpacpi_lifecycle = TPACPI_LIFE_INIT; 9637 9638 /* Driver-level probe */ 9639 9640 ret = get_thinkpad_model_data(&thinkpad_id); 9641 if (ret) { 9642 pr_err("unable to get DMI data: %d\n", ret); 9643 thinkpad_acpi_module_exit(); 9644 return ret; 9645 } 9646 ret = probe_for_thinkpad(); 9647 if (ret) { 9648 thinkpad_acpi_module_exit(); 9649 return ret; 9650 } 9651 9652 /* Driver initialization */ 9653 9654 thinkpad_acpi_init_banner(); 9655 tpacpi_check_outdated_fw(); 9656 9657 TPACPI_ACPIHANDLE_INIT(ecrd); 9658 TPACPI_ACPIHANDLE_INIT(ecwr); 9659 9660 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 9661 if (!tpacpi_wq) { 9662 thinkpad_acpi_module_exit(); 9663 return -ENOMEM; 9664 } 9665 9666 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 9667 if (!proc_dir) { 9668 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 9669 thinkpad_acpi_module_exit(); 9670 return -ENODEV; 9671 } 9672 9673 ret = platform_driver_register(&tpacpi_pdriver); 9674 if (ret) { 9675 pr_err("unable to register main platform driver\n"); 9676 thinkpad_acpi_module_exit(); 9677 return ret; 9678 } 9679 tp_features.platform_drv_registered = 1; 9680 9681 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 9682 if (ret) { 9683 pr_err("unable to register hwmon platform driver\n"); 9684 thinkpad_acpi_module_exit(); 9685 return ret; 9686 } 9687 tp_features.sensors_pdrv_registered = 1; 9688 9689 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 9690 if (!ret) { 9691 tp_features.platform_drv_attrs_registered = 1; 9692 ret = tpacpi_create_driver_attributes( 9693 &tpacpi_hwmon_pdriver.driver); 9694 } 9695 if (ret) { 9696 pr_err("unable to create sysfs driver attributes\n"); 9697 thinkpad_acpi_module_exit(); 9698 return ret; 9699 } 9700 tp_features.sensors_pdrv_attrs_registered = 1; 9701 9702 9703 /* Device initialization */ 9704 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9705 NULL, 0); 9706 if (IS_ERR(tpacpi_pdev)) { 9707 ret = PTR_ERR(tpacpi_pdev); 9708 tpacpi_pdev = NULL; 9709 pr_err("unable to register platform device\n"); 9710 thinkpad_acpi_module_exit(); 9711 return ret; 9712 } 9713 tpacpi_sensors_pdev = platform_device_register_simple( 9714 TPACPI_HWMON_DRVR_NAME, 9715 -1, NULL, 0); 9716 if (IS_ERR(tpacpi_sensors_pdev)) { 9717 ret = PTR_ERR(tpacpi_sensors_pdev); 9718 tpacpi_sensors_pdev = NULL; 9719 pr_err("unable to register hwmon platform device\n"); 9720 thinkpad_acpi_module_exit(); 9721 return ret; 9722 } 9723 ret = device_create_file(&tpacpi_sensors_pdev->dev, &dev_attr_name); 9724 if (ret) { 9725 pr_err("unable to create sysfs hwmon device attributes\n"); 9726 thinkpad_acpi_module_exit(); 9727 return ret; 9728 } 9729 tp_features.sensors_pdev_attrs_registered = 1; 9730 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9731 if (IS_ERR(tpacpi_hwmon)) { 9732 ret = PTR_ERR(tpacpi_hwmon); 9733 tpacpi_hwmon = NULL; 9734 pr_err("unable to register hwmon device\n"); 9735 thinkpad_acpi_module_exit(); 9736 return ret; 9737 } 9738 mutex_init(&tpacpi_inputdev_send_mutex); 9739 tpacpi_inputdev = input_allocate_device(); 9740 if (!tpacpi_inputdev) { 9741 thinkpad_acpi_module_exit(); 9742 return -ENOMEM; 9743 } else { 9744 /* Prepare input device, but don't register */ 9745 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9746 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9747 tpacpi_inputdev->id.bustype = BUS_HOST; 9748 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9749 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9750 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9751 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9752 } 9753 9754 /* Init subdriver dependencies */ 9755 tpacpi_detect_brightness_capabilities(); 9756 9757 /* Init subdrivers */ 9758 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9759 ret = ibm_init(&ibms_init[i]); 9760 if (ret >= 0 && *ibms_init[i].param) 9761 ret = ibms_init[i].data->write(ibms_init[i].param); 9762 if (ret < 0) { 9763 thinkpad_acpi_module_exit(); 9764 return ret; 9765 } 9766 } 9767 9768 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9769 9770 ret = input_register_device(tpacpi_inputdev); 9771 if (ret < 0) { 9772 pr_err("unable to register input device\n"); 9773 thinkpad_acpi_module_exit(); 9774 return ret; 9775 } else { 9776 tp_features.input_device_registered = 1; 9777 } 9778 9779 return 0; 9780 } 9781 9782 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9783 9784 /* 9785 * This will autoload the driver in almost every ThinkPad 9786 * in widespread use. 9787 * 9788 * Only _VERY_ old models, like the 240, 240x and 570 lack 9789 * the HKEY event interface. 9790 */ 9791 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9792 9793 /* 9794 * DMI matching for module autoloading 9795 * 9796 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9797 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9798 * 9799 * Only models listed in thinkwiki will be supported, so add yours 9800 * if it is not there yet. 9801 */ 9802 #define IBM_BIOS_MODULE_ALIAS(__type) \ 9803 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9804 9805 /* Ancient thinkpad BIOSes have to be identified by 9806 * BIOS type or model number, and there are far less 9807 * BIOS types than model numbers... */ 9808 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9809 9810 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9811 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9812 MODULE_DESCRIPTION(TPACPI_DESC); 9813 MODULE_VERSION(TPACPI_VERSION); 9814 MODULE_LICENSE("GPL"); 9815 9816 module_init(thinkpad_acpi_module_init); 9817 module_exit(thinkpad_acpi_module_exit); 9818