1 /* 2 * thinkpad_acpi.c - ThinkPad ACPI Extras 3 * 4 * 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net> 6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #define TPACPI_VERSION "0.25" 27 #define TPACPI_SYSFS_VERSION 0x020700 28 29 /* 30 * Changelog: 31 * 2007-10-20 changelog trimmed down 32 * 33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 34 * drivers/misc. 35 * 36 * 2006-11-22 0.13 new maintainer 37 * changelog now lives in git commit history, and will 38 * not be updated further in-file. 39 * 40 * 2005-03-17 0.11 support for 600e, 770x 41 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 42 * 43 * 2005-01-16 0.9 use MODULE_VERSION 44 * thanks to Henrik Brix Andersen <brix@gentoo.org> 45 * fix parameter passing on module loading 46 * thanks to Rusty Russell <rusty@rustcorp.com.au> 47 * thanks to Jim Radford <radford@blackbean.org> 48 * 2004-11-08 0.8 fix init error case, don't return from a macro 49 * thanks to Chris Wright <chrisw@osdl.org> 50 */ 51 52 #include <linux/kernel.h> 53 #include <linux/module.h> 54 #include <linux/init.h> 55 #include <linux/types.h> 56 #include <linux/string.h> 57 #include <linux/list.h> 58 #include <linux/mutex.h> 59 #include <linux/sched.h> 60 #include <linux/kthread.h> 61 #include <linux/freezer.h> 62 #include <linux/delay.h> 63 #include <linux/slab.h> 64 #include <linux/nvram.h> 65 #include <linux/proc_fs.h> 66 #include <linux/seq_file.h> 67 #include <linux/sysfs.h> 68 #include <linux/backlight.h> 69 #include <linux/fb.h> 70 #include <linux/platform_device.h> 71 #include <linux/hwmon.h> 72 #include <linux/hwmon-sysfs.h> 73 #include <linux/input.h> 74 #include <linux/leds.h> 75 #include <linux/rfkill.h> 76 #include <linux/dmi.h> 77 #include <linux/jiffies.h> 78 #include <linux/workqueue.h> 79 #include <linux/acpi.h> 80 #include <linux/pci_ids.h> 81 #include <linux/thinkpad_acpi.h> 82 #include <sound/core.h> 83 #include <sound/control.h> 84 #include <sound/initval.h> 85 #include <asm/uaccess.h> 86 87 /* ThinkPad CMOS commands */ 88 #define TP_CMOS_VOLUME_DOWN 0 89 #define TP_CMOS_VOLUME_UP 1 90 #define TP_CMOS_VOLUME_MUTE 2 91 #define TP_CMOS_BRIGHTNESS_UP 4 92 #define TP_CMOS_BRIGHTNESS_DOWN 5 93 #define TP_CMOS_THINKLIGHT_ON 12 94 #define TP_CMOS_THINKLIGHT_OFF 13 95 96 /* NVRAM Addresses */ 97 enum tp_nvram_addr { 98 TP_NVRAM_ADDR_HK2 = 0x57, 99 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 100 TP_NVRAM_ADDR_VIDEO = 0x59, 101 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 102 TP_NVRAM_ADDR_MIXER = 0x60, 103 }; 104 105 /* NVRAM bit masks */ 106 enum { 107 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 108 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 109 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 110 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 111 TP_NVRAM_MASK_THINKLIGHT = 0x10, 112 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 113 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 114 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 115 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 116 TP_NVRAM_MASK_MUTE = 0x40, 117 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 118 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 119 TP_NVRAM_POS_LEVEL_VOLUME = 0, 120 }; 121 122 /* Misc NVRAM-related */ 123 enum { 124 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 125 }; 126 127 /* ACPI HIDs */ 128 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 129 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 130 #define TPACPI_ACPI_EC_HID "PNP0C09" 131 132 /* Input IDs */ 133 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 134 #define TPACPI_HKEY_INPUT_VERSION 0x4101 135 136 /* ACPI \WGSV commands */ 137 enum { 138 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 139 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 140 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 141 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 142 }; 143 144 /* TP_ACPI_WGSV_GET_STATE bits */ 145 enum { 146 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 147 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 148 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 149 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 150 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 151 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 152 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 153 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 154 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 155 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 156 }; 157 158 /* HKEY events */ 159 enum tpacpi_hkey_event_t { 160 /* Hotkey-related */ 161 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 162 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 163 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 164 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 165 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 166 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 167 168 /* Reasons for waking up from S3/S4 */ 169 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 170 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 171 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 172 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 173 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 174 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 175 176 /* Auto-sleep after eject request */ 177 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 178 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 179 180 /* Misc bay events */ 181 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 182 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 183 or port replicator */ 184 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 185 dock or port replicator */ 186 187 /* User-interface events */ 188 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 189 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 190 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 191 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 192 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 193 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 194 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 195 196 /* Key-related user-interface events */ 197 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 198 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 199 200 /* Thermal events */ 201 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 202 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 203 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 204 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 205 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 206 207 /* AC-related events */ 208 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 209 210 /* Misc */ 211 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 212 }; 213 214 /**************************************************************************** 215 * Main driver 216 */ 217 218 #define TPACPI_NAME "thinkpad" 219 #define TPACPI_DESC "ThinkPad ACPI Extras" 220 #define TPACPI_FILE TPACPI_NAME "_acpi" 221 #define TPACPI_URL "http://ibm-acpi.sf.net/" 222 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 223 224 #define TPACPI_PROC_DIR "ibm" 225 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 226 #define TPACPI_DRVR_NAME TPACPI_FILE 227 #define TPACPI_DRVR_SHORTNAME "tpacpi" 228 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 229 230 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 231 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 232 233 #define TPACPI_MAX_ACPI_ARGS 3 234 235 /* Debugging printk groups */ 236 #define TPACPI_DBG_ALL 0xffff 237 #define TPACPI_DBG_DISCLOSETASK 0x8000 238 #define TPACPI_DBG_INIT 0x0001 239 #define TPACPI_DBG_EXIT 0x0002 240 #define TPACPI_DBG_RFKILL 0x0004 241 #define TPACPI_DBG_HKEY 0x0008 242 #define TPACPI_DBG_FAN 0x0010 243 #define TPACPI_DBG_BRGHT 0x0020 244 #define TPACPI_DBG_MIXER 0x0040 245 246 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 247 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 248 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 249 250 251 /**************************************************************************** 252 * Driver-wide structs and misc. variables 253 */ 254 255 struct ibm_struct; 256 257 struct tp_acpi_drv_struct { 258 const struct acpi_device_id *hid; 259 struct acpi_driver *driver; 260 261 void (*notify) (struct ibm_struct *, u32); 262 acpi_handle *handle; 263 u32 type; 264 struct acpi_device *device; 265 }; 266 267 struct ibm_struct { 268 char *name; 269 270 int (*read) (struct seq_file *); 271 int (*write) (char *); 272 void (*exit) (void); 273 void (*resume) (void); 274 void (*suspend) (void); 275 void (*shutdown) (void); 276 277 struct list_head all_drivers; 278 279 struct tp_acpi_drv_struct *acpi; 280 281 struct { 282 u8 acpi_driver_registered:1; 283 u8 acpi_notify_installed:1; 284 u8 proc_created:1; 285 u8 init_called:1; 286 u8 experimental:1; 287 } flags; 288 }; 289 290 struct ibm_init_struct { 291 char param[32]; 292 293 int (*init) (struct ibm_init_struct *); 294 umode_t base_procfs_mode; 295 struct ibm_struct *data; 296 }; 297 298 static struct { 299 u32 bluetooth:1; 300 u32 hotkey:1; 301 u32 hotkey_mask:1; 302 u32 hotkey_wlsw:1; 303 u32 hotkey_tablet:1; 304 u32 light:1; 305 u32 light_status:1; 306 u32 bright_acpimode:1; 307 u32 bright_unkfw:1; 308 u32 wan:1; 309 u32 uwb:1; 310 u32 fan_ctrl_status_undef:1; 311 u32 second_fan:1; 312 u32 beep_needs_two_args:1; 313 u32 mixer_no_level_control:1; 314 u32 input_device_registered:1; 315 u32 platform_drv_registered:1; 316 u32 platform_drv_attrs_registered:1; 317 u32 sensors_pdrv_registered:1; 318 u32 sensors_pdrv_attrs_registered:1; 319 u32 sensors_pdev_attrs_registered:1; 320 u32 hotkey_poll_active:1; 321 } tp_features; 322 323 static struct { 324 u16 hotkey_mask_ff:1; 325 u16 volume_ctrl_forbidden:1; 326 } tp_warned; 327 328 struct thinkpad_id_data { 329 unsigned int vendor; /* ThinkPad vendor: 330 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 331 332 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 333 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 334 335 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 336 u16 ec_model; 337 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 338 u16 ec_release; 339 340 char *model_str; /* ThinkPad T43 */ 341 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 342 }; 343 static struct thinkpad_id_data thinkpad_id; 344 345 static enum { 346 TPACPI_LIFE_INIT = 0, 347 TPACPI_LIFE_RUNNING, 348 TPACPI_LIFE_EXITING, 349 } tpacpi_lifecycle; 350 351 static int experimental; 352 static u32 dbg_level; 353 354 static struct workqueue_struct *tpacpi_wq; 355 356 enum led_status_t { 357 TPACPI_LED_OFF = 0, 358 TPACPI_LED_ON, 359 TPACPI_LED_BLINK, 360 }; 361 362 /* Special LED class that can defer work */ 363 struct tpacpi_led_classdev { 364 struct led_classdev led_classdev; 365 struct work_struct work; 366 enum led_status_t new_state; 367 int led; 368 }; 369 370 /* brightness level capabilities */ 371 static unsigned int bright_maxlvl; /* 0 = unknown */ 372 373 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 374 static int dbg_wlswemul; 375 static bool tpacpi_wlsw_emulstate; 376 static int dbg_bluetoothemul; 377 static bool tpacpi_bluetooth_emulstate; 378 static int dbg_wwanemul; 379 static bool tpacpi_wwan_emulstate; 380 static int dbg_uwbemul; 381 static bool tpacpi_uwb_emulstate; 382 #endif 383 384 385 /************************************************************************* 386 * Debugging helpers 387 */ 388 389 #define dbg_printk(a_dbg_level, format, arg...) \ 390 do { \ 391 if (dbg_level & (a_dbg_level)) \ 392 printk(KERN_DEBUG pr_fmt("%s: " format), \ 393 __func__, ##arg); \ 394 } while (0) 395 396 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 397 #define vdbg_printk dbg_printk 398 static const char *str_supported(int is_supported); 399 #else 400 static inline const char *str_supported(int is_supported) { return ""; } 401 #define vdbg_printk(a_dbg_level, format, arg...) \ 402 no_printk(format, ##arg) 403 #endif 404 405 static void tpacpi_log_usertask(const char * const what) 406 { 407 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 408 what, task_tgid_vnr(current)); 409 } 410 411 #define tpacpi_disclose_usertask(what, format, arg...) \ 412 do { \ 413 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 414 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 415 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 416 what, task_tgid_vnr(current), ## arg); \ 417 } \ 418 } while (0) 419 420 /* 421 * Quirk handling helpers 422 * 423 * ThinkPad IDs and versions seen in the field so far 424 * are two-characters from the set [0-9A-Z], i.e. base 36. 425 * 426 * We use values well outside that range as specials. 427 */ 428 429 #define TPACPI_MATCH_ANY 0xffffU 430 #define TPACPI_MATCH_UNKNOWN 0U 431 432 /* TPID('1', 'Y') == 0x5931 */ 433 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 434 435 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 436 { .vendor = PCI_VENDOR_ID_IBM, \ 437 .bios = TPID(__id1, __id2), \ 438 .ec = TPACPI_MATCH_ANY, \ 439 .quirks = (__quirk) } 440 441 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 442 { .vendor = PCI_VENDOR_ID_LENOVO, \ 443 .bios = TPID(__id1, __id2), \ 444 .ec = TPACPI_MATCH_ANY, \ 445 .quirks = (__quirk) } 446 447 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 448 { .vendor = PCI_VENDOR_ID_LENOVO, \ 449 .bios = TPACPI_MATCH_ANY, \ 450 .ec = TPID(__id1, __id2), \ 451 .quirks = (__quirk) } 452 453 struct tpacpi_quirk { 454 unsigned int vendor; 455 u16 bios; 456 u16 ec; 457 unsigned long quirks; 458 }; 459 460 /** 461 * tpacpi_check_quirks() - search BIOS/EC version on a list 462 * @qlist: array of &struct tpacpi_quirk 463 * @qlist_size: number of elements in @qlist 464 * 465 * Iterates over a quirks list until one is found that matches the 466 * ThinkPad's vendor, BIOS and EC model. 467 * 468 * Returns 0 if nothing matches, otherwise returns the quirks field of 469 * the matching &struct tpacpi_quirk entry. 470 * 471 * The match criteria is: vendor, ec and bios much match. 472 */ 473 static unsigned long __init tpacpi_check_quirks( 474 const struct tpacpi_quirk *qlist, 475 unsigned int qlist_size) 476 { 477 while (qlist_size) { 478 if ((qlist->vendor == thinkpad_id.vendor || 479 qlist->vendor == TPACPI_MATCH_ANY) && 480 (qlist->bios == thinkpad_id.bios_model || 481 qlist->bios == TPACPI_MATCH_ANY) && 482 (qlist->ec == thinkpad_id.ec_model || 483 qlist->ec == TPACPI_MATCH_ANY)) 484 return qlist->quirks; 485 486 qlist_size--; 487 qlist++; 488 } 489 return 0; 490 } 491 492 static inline bool __pure __init tpacpi_is_lenovo(void) 493 { 494 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 495 } 496 497 static inline bool __pure __init tpacpi_is_ibm(void) 498 { 499 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 500 } 501 502 /**************************************************************************** 503 **************************************************************************** 504 * 505 * ACPI Helpers and device model 506 * 507 **************************************************************************** 508 ****************************************************************************/ 509 510 /************************************************************************* 511 * ACPI basic handles 512 */ 513 514 static acpi_handle root_handle; 515 static acpi_handle ec_handle; 516 517 #define TPACPI_HANDLE(object, parent, paths...) \ 518 static acpi_handle object##_handle; \ 519 static const acpi_handle * const object##_parent __initconst = \ 520 &parent##_handle; \ 521 static char *object##_paths[] __initdata = { paths } 522 523 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 524 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 525 526 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 527 /* T4x, X31, X40 */ 528 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 529 "\\CMS", /* R40, R40e */ 530 ); /* all others */ 531 532 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 533 "^HKEY", /* R30, R31 */ 534 "HKEY", /* all others */ 535 ); /* 570 */ 536 537 /************************************************************************* 538 * ACPI helpers 539 */ 540 541 static int acpi_evalf(acpi_handle handle, 542 int *res, char *method, char *fmt, ...) 543 { 544 char *fmt0 = fmt; 545 struct acpi_object_list params; 546 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 547 struct acpi_buffer result, *resultp; 548 union acpi_object out_obj; 549 acpi_status status; 550 va_list ap; 551 char res_type; 552 int success; 553 int quiet; 554 555 if (!*fmt) { 556 pr_err("acpi_evalf() called with empty format\n"); 557 return 0; 558 } 559 560 if (*fmt == 'q') { 561 quiet = 1; 562 fmt++; 563 } else 564 quiet = 0; 565 566 res_type = *(fmt++); 567 568 params.count = 0; 569 params.pointer = &in_objs[0]; 570 571 va_start(ap, fmt); 572 while (*fmt) { 573 char c = *(fmt++); 574 switch (c) { 575 case 'd': /* int */ 576 in_objs[params.count].integer.value = va_arg(ap, int); 577 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 578 break; 579 /* add more types as needed */ 580 default: 581 pr_err("acpi_evalf() called " 582 "with invalid format character '%c'\n", c); 583 va_end(ap); 584 return 0; 585 } 586 } 587 va_end(ap); 588 589 if (res_type != 'v') { 590 result.length = sizeof(out_obj); 591 result.pointer = &out_obj; 592 resultp = &result; 593 } else 594 resultp = NULL; 595 596 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 597 598 switch (res_type) { 599 case 'd': /* int */ 600 success = (status == AE_OK && 601 out_obj.type == ACPI_TYPE_INTEGER); 602 if (success && res) 603 *res = out_obj.integer.value; 604 break; 605 case 'v': /* void */ 606 success = status == AE_OK; 607 break; 608 /* add more types as needed */ 609 default: 610 pr_err("acpi_evalf() called " 611 "with invalid format character '%c'\n", res_type); 612 return 0; 613 } 614 615 if (!success && !quiet) 616 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 617 method, fmt0, acpi_format_exception(status)); 618 619 return success; 620 } 621 622 static int acpi_ec_read(int i, u8 *p) 623 { 624 int v; 625 626 if (ecrd_handle) { 627 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 628 return 0; 629 *p = v; 630 } else { 631 if (ec_read(i, p) < 0) 632 return 0; 633 } 634 635 return 1; 636 } 637 638 static int acpi_ec_write(int i, u8 v) 639 { 640 if (ecwr_handle) { 641 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 642 return 0; 643 } else { 644 if (ec_write(i, v) < 0) 645 return 0; 646 } 647 648 return 1; 649 } 650 651 static int issue_thinkpad_cmos_command(int cmos_cmd) 652 { 653 if (!cmos_handle) 654 return -ENXIO; 655 656 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 657 return -EIO; 658 659 return 0; 660 } 661 662 /************************************************************************* 663 * ACPI device model 664 */ 665 666 #define TPACPI_ACPIHANDLE_INIT(object) \ 667 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 668 object##_paths, ARRAY_SIZE(object##_paths)) 669 670 static void __init drv_acpi_handle_init(const char *name, 671 acpi_handle *handle, const acpi_handle parent, 672 char **paths, const int num_paths) 673 { 674 int i; 675 acpi_status status; 676 677 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 678 name); 679 680 for (i = 0; i < num_paths; i++) { 681 status = acpi_get_handle(parent, paths[i], handle); 682 if (ACPI_SUCCESS(status)) { 683 dbg_printk(TPACPI_DBG_INIT, 684 "Found ACPI handle %s for %s\n", 685 paths[i], name); 686 return; 687 } 688 } 689 690 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 691 name); 692 *handle = NULL; 693 } 694 695 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 696 u32 level, void *context, void **return_value) 697 { 698 struct acpi_device *dev; 699 if (!strcmp(context, "video")) { 700 if (acpi_bus_get_device(handle, &dev)) 701 return AE_OK; 702 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 703 return AE_OK; 704 } 705 706 *(acpi_handle *)return_value = handle; 707 708 return AE_CTRL_TERMINATE; 709 } 710 711 static void __init tpacpi_acpi_handle_locate(const char *name, 712 const char *hid, 713 acpi_handle *handle) 714 { 715 acpi_status status; 716 acpi_handle device_found; 717 718 BUG_ON(!name || !handle); 719 vdbg_printk(TPACPI_DBG_INIT, 720 "trying to locate ACPI handle for %s, using HID %s\n", 721 name, hid ? hid : "NULL"); 722 723 memset(&device_found, 0, sizeof(device_found)); 724 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 725 (void *)name, &device_found); 726 727 *handle = NULL; 728 729 if (ACPI_SUCCESS(status)) { 730 *handle = device_found; 731 dbg_printk(TPACPI_DBG_INIT, 732 "Found ACPI handle for %s\n", name); 733 } else { 734 vdbg_printk(TPACPI_DBG_INIT, 735 "Could not locate an ACPI handle for %s: %s\n", 736 name, acpi_format_exception(status)); 737 } 738 } 739 740 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 741 { 742 struct ibm_struct *ibm = data; 743 744 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 745 return; 746 747 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 748 return; 749 750 ibm->acpi->notify(ibm, event); 751 } 752 753 static int __init setup_acpi_notify(struct ibm_struct *ibm) 754 { 755 acpi_status status; 756 int rc; 757 758 BUG_ON(!ibm->acpi); 759 760 if (!*ibm->acpi->handle) 761 return 0; 762 763 vdbg_printk(TPACPI_DBG_INIT, 764 "setting up ACPI notify for %s\n", ibm->name); 765 766 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 767 if (rc < 0) { 768 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 769 return -ENODEV; 770 } 771 772 ibm->acpi->device->driver_data = ibm; 773 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 774 TPACPI_ACPI_EVENT_PREFIX, 775 ibm->name); 776 777 status = acpi_install_notify_handler(*ibm->acpi->handle, 778 ibm->acpi->type, dispatch_acpi_notify, ibm); 779 if (ACPI_FAILURE(status)) { 780 if (status == AE_ALREADY_EXISTS) { 781 pr_notice("another device driver is already " 782 "handling %s events\n", ibm->name); 783 } else { 784 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 785 ibm->name, acpi_format_exception(status)); 786 } 787 return -ENODEV; 788 } 789 ibm->flags.acpi_notify_installed = 1; 790 return 0; 791 } 792 793 static int __init tpacpi_device_add(struct acpi_device *device) 794 { 795 return 0; 796 } 797 798 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 799 { 800 int rc; 801 802 dbg_printk(TPACPI_DBG_INIT, 803 "registering %s as an ACPI driver\n", ibm->name); 804 805 BUG_ON(!ibm->acpi); 806 807 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 808 if (!ibm->acpi->driver) { 809 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 810 return -ENOMEM; 811 } 812 813 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 814 ibm->acpi->driver->ids = ibm->acpi->hid; 815 816 ibm->acpi->driver->ops.add = &tpacpi_device_add; 817 818 rc = acpi_bus_register_driver(ibm->acpi->driver); 819 if (rc < 0) { 820 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 821 ibm->name, rc); 822 kfree(ibm->acpi->driver); 823 ibm->acpi->driver = NULL; 824 } else if (!rc) 825 ibm->flags.acpi_driver_registered = 1; 826 827 return rc; 828 } 829 830 831 /**************************************************************************** 832 **************************************************************************** 833 * 834 * Procfs Helpers 835 * 836 **************************************************************************** 837 ****************************************************************************/ 838 839 static int dispatch_proc_show(struct seq_file *m, void *v) 840 { 841 struct ibm_struct *ibm = m->private; 842 843 if (!ibm || !ibm->read) 844 return -EINVAL; 845 return ibm->read(m); 846 } 847 848 static int dispatch_proc_open(struct inode *inode, struct file *file) 849 { 850 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 851 } 852 853 static ssize_t dispatch_proc_write(struct file *file, 854 const char __user *userbuf, 855 size_t count, loff_t *pos) 856 { 857 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 858 char *kernbuf; 859 int ret; 860 861 if (!ibm || !ibm->write) 862 return -EINVAL; 863 if (count > PAGE_SIZE - 2) 864 return -EINVAL; 865 866 kernbuf = kmalloc(count + 2, GFP_KERNEL); 867 if (!kernbuf) 868 return -ENOMEM; 869 870 if (copy_from_user(kernbuf, userbuf, count)) { 871 kfree(kernbuf); 872 return -EFAULT; 873 } 874 875 kernbuf[count] = 0; 876 strcat(kernbuf, ","); 877 ret = ibm->write(kernbuf); 878 if (ret == 0) 879 ret = count; 880 881 kfree(kernbuf); 882 883 return ret; 884 } 885 886 static const struct file_operations dispatch_proc_fops = { 887 .owner = THIS_MODULE, 888 .open = dispatch_proc_open, 889 .read = seq_read, 890 .llseek = seq_lseek, 891 .release = single_release, 892 .write = dispatch_proc_write, 893 }; 894 895 static char *next_cmd(char **cmds) 896 { 897 char *start = *cmds; 898 char *end; 899 900 while ((end = strchr(start, ',')) && end == start) 901 start = end + 1; 902 903 if (!end) 904 return NULL; 905 906 *end = 0; 907 *cmds = end + 1; 908 return start; 909 } 910 911 912 /**************************************************************************** 913 **************************************************************************** 914 * 915 * Device model: input, hwmon and platform 916 * 917 **************************************************************************** 918 ****************************************************************************/ 919 920 static struct platform_device *tpacpi_pdev; 921 static struct platform_device *tpacpi_sensors_pdev; 922 static struct device *tpacpi_hwmon; 923 static struct input_dev *tpacpi_inputdev; 924 static struct mutex tpacpi_inputdev_send_mutex; 925 static LIST_HEAD(tpacpi_all_drivers); 926 927 #ifdef CONFIG_PM_SLEEP 928 static int tpacpi_suspend_handler(struct device *dev) 929 { 930 struct ibm_struct *ibm, *itmp; 931 932 list_for_each_entry_safe(ibm, itmp, 933 &tpacpi_all_drivers, 934 all_drivers) { 935 if (ibm->suspend) 936 (ibm->suspend)(); 937 } 938 939 return 0; 940 } 941 942 static int tpacpi_resume_handler(struct device *dev) 943 { 944 struct ibm_struct *ibm, *itmp; 945 946 list_for_each_entry_safe(ibm, itmp, 947 &tpacpi_all_drivers, 948 all_drivers) { 949 if (ibm->resume) 950 (ibm->resume)(); 951 } 952 953 return 0; 954 } 955 #endif 956 957 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 958 tpacpi_suspend_handler, tpacpi_resume_handler); 959 960 static void tpacpi_shutdown_handler(struct platform_device *pdev) 961 { 962 struct ibm_struct *ibm, *itmp; 963 964 list_for_each_entry_safe(ibm, itmp, 965 &tpacpi_all_drivers, 966 all_drivers) { 967 if (ibm->shutdown) 968 (ibm->shutdown)(); 969 } 970 } 971 972 static struct platform_driver tpacpi_pdriver = { 973 .driver = { 974 .name = TPACPI_DRVR_NAME, 975 .pm = &tpacpi_pm, 976 }, 977 .shutdown = tpacpi_shutdown_handler, 978 }; 979 980 static struct platform_driver tpacpi_hwmon_pdriver = { 981 .driver = { 982 .name = TPACPI_HWMON_DRVR_NAME, 983 }, 984 }; 985 986 /************************************************************************* 987 * sysfs support helpers 988 */ 989 990 struct attribute_set { 991 unsigned int members, max_members; 992 struct attribute_group group; 993 }; 994 995 struct attribute_set_obj { 996 struct attribute_set s; 997 struct attribute *a; 998 } __attribute__((packed)); 999 1000 static struct attribute_set *create_attr_set(unsigned int max_members, 1001 const char *name) 1002 { 1003 struct attribute_set_obj *sobj; 1004 1005 if (max_members == 0) 1006 return NULL; 1007 1008 /* Allocates space for implicit NULL at the end too */ 1009 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1010 max_members * sizeof(struct attribute *), 1011 GFP_KERNEL); 1012 if (!sobj) 1013 return NULL; 1014 sobj->s.max_members = max_members; 1015 sobj->s.group.attrs = &sobj->a; 1016 sobj->s.group.name = name; 1017 1018 return &sobj->s; 1019 } 1020 1021 #define destroy_attr_set(_set) \ 1022 kfree(_set); 1023 1024 /* not multi-threaded safe, use it in a single thread per set */ 1025 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1026 { 1027 if (!s || !attr) 1028 return -EINVAL; 1029 1030 if (s->members >= s->max_members) 1031 return -ENOMEM; 1032 1033 s->group.attrs[s->members] = attr; 1034 s->members++; 1035 1036 return 0; 1037 } 1038 1039 static int add_many_to_attr_set(struct attribute_set *s, 1040 struct attribute **attr, 1041 unsigned int count) 1042 { 1043 int i, res; 1044 1045 for (i = 0; i < count; i++) { 1046 res = add_to_attr_set(s, attr[i]); 1047 if (res) 1048 return res; 1049 } 1050 1051 return 0; 1052 } 1053 1054 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1055 { 1056 sysfs_remove_group(kobj, &s->group); 1057 destroy_attr_set(s); 1058 } 1059 1060 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1061 sysfs_create_group(_kobj, &_attr_set->group) 1062 1063 static int parse_strtoul(const char *buf, 1064 unsigned long max, unsigned long *value) 1065 { 1066 char *endp; 1067 1068 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1069 endp = skip_spaces(endp); 1070 if (*endp || *value > max) 1071 return -EINVAL; 1072 1073 return 0; 1074 } 1075 1076 static void tpacpi_disable_brightness_delay(void) 1077 { 1078 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1079 pr_notice("ACPI backlight control delay disabled\n"); 1080 } 1081 1082 static void printk_deprecated_attribute(const char * const what, 1083 const char * const details) 1084 { 1085 tpacpi_log_usertask("deprecated sysfs attribute"); 1086 pr_warn("WARNING: sysfs attribute %s is deprecated and " 1087 "will be removed. %s\n", 1088 what, details); 1089 } 1090 1091 /************************************************************************* 1092 * rfkill and radio control support helpers 1093 */ 1094 1095 /* 1096 * ThinkPad-ACPI firmware handling model: 1097 * 1098 * WLSW (master wireless switch) is event-driven, and is common to all 1099 * firmware-controlled radios. It cannot be controlled, just monitored, 1100 * as expected. It overrides all radio state in firmware 1101 * 1102 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1103 * (TODO: verify how WLSW interacts with the returned radio state). 1104 * 1105 * The only time there are shadow radio state changes, is when 1106 * masked-off hotkeys are used. 1107 */ 1108 1109 /* 1110 * Internal driver API for radio state: 1111 * 1112 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1113 * bool: true means radio blocked (off) 1114 */ 1115 enum tpacpi_rfkill_state { 1116 TPACPI_RFK_RADIO_OFF = 0, 1117 TPACPI_RFK_RADIO_ON 1118 }; 1119 1120 /* rfkill switches */ 1121 enum tpacpi_rfk_id { 1122 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1123 TPACPI_RFK_WWAN_SW_ID, 1124 TPACPI_RFK_UWB_SW_ID, 1125 TPACPI_RFK_SW_MAX 1126 }; 1127 1128 static const char *tpacpi_rfkill_names[] = { 1129 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1130 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1131 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1132 [TPACPI_RFK_SW_MAX] = NULL 1133 }; 1134 1135 /* ThinkPad-ACPI rfkill subdriver */ 1136 struct tpacpi_rfk { 1137 struct rfkill *rfkill; 1138 enum tpacpi_rfk_id id; 1139 const struct tpacpi_rfk_ops *ops; 1140 }; 1141 1142 struct tpacpi_rfk_ops { 1143 /* firmware interface */ 1144 int (*get_status)(void); 1145 int (*set_status)(const enum tpacpi_rfkill_state); 1146 }; 1147 1148 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1149 1150 /* Query FW and update rfkill sw state for a given rfkill switch */ 1151 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1152 { 1153 int status; 1154 1155 if (!tp_rfk) 1156 return -ENODEV; 1157 1158 status = (tp_rfk->ops->get_status)(); 1159 if (status < 0) 1160 return status; 1161 1162 rfkill_set_sw_state(tp_rfk->rfkill, 1163 (status == TPACPI_RFK_RADIO_OFF)); 1164 1165 return status; 1166 } 1167 1168 /* Query FW and update rfkill sw state for all rfkill switches */ 1169 static void tpacpi_rfk_update_swstate_all(void) 1170 { 1171 unsigned int i; 1172 1173 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1174 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1175 } 1176 1177 /* 1178 * Sync the HW-blocking state of all rfkill switches, 1179 * do notice it causes the rfkill core to schedule uevents 1180 */ 1181 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1182 { 1183 unsigned int i; 1184 struct tpacpi_rfk *tp_rfk; 1185 1186 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1187 tp_rfk = tpacpi_rfkill_switches[i]; 1188 if (tp_rfk) { 1189 if (rfkill_set_hw_state(tp_rfk->rfkill, 1190 blocked)) { 1191 /* ignore -- we track sw block */ 1192 } 1193 } 1194 } 1195 } 1196 1197 /* Call to get the WLSW state from the firmware */ 1198 static int hotkey_get_wlsw(void); 1199 1200 /* Call to query WLSW state and update all rfkill switches */ 1201 static bool tpacpi_rfk_check_hwblock_state(void) 1202 { 1203 int res = hotkey_get_wlsw(); 1204 int hw_blocked; 1205 1206 /* When unknown or unsupported, we have to assume it is unblocked */ 1207 if (res < 0) 1208 return false; 1209 1210 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1211 tpacpi_rfk_update_hwblock_state(hw_blocked); 1212 1213 return hw_blocked; 1214 } 1215 1216 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1217 { 1218 struct tpacpi_rfk *tp_rfk = data; 1219 int res; 1220 1221 dbg_printk(TPACPI_DBG_RFKILL, 1222 "request to change radio state to %s\n", 1223 blocked ? "blocked" : "unblocked"); 1224 1225 /* try to set radio state */ 1226 res = (tp_rfk->ops->set_status)(blocked ? 1227 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1228 1229 /* and update the rfkill core with whatever the FW really did */ 1230 tpacpi_rfk_update_swstate(tp_rfk); 1231 1232 return (res < 0) ? res : 0; 1233 } 1234 1235 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1236 .set_block = tpacpi_rfk_hook_set_block, 1237 }; 1238 1239 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1240 const struct tpacpi_rfk_ops *tp_rfkops, 1241 const enum rfkill_type rfktype, 1242 const char *name, 1243 const bool set_default) 1244 { 1245 struct tpacpi_rfk *atp_rfk; 1246 int res; 1247 bool sw_state = false; 1248 bool hw_state; 1249 int sw_status; 1250 1251 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1252 1253 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1254 if (atp_rfk) 1255 atp_rfk->rfkill = rfkill_alloc(name, 1256 &tpacpi_pdev->dev, 1257 rfktype, 1258 &tpacpi_rfk_rfkill_ops, 1259 atp_rfk); 1260 if (!atp_rfk || !atp_rfk->rfkill) { 1261 pr_err("failed to allocate memory for rfkill class\n"); 1262 kfree(atp_rfk); 1263 return -ENOMEM; 1264 } 1265 1266 atp_rfk->id = id; 1267 atp_rfk->ops = tp_rfkops; 1268 1269 sw_status = (tp_rfkops->get_status)(); 1270 if (sw_status < 0) { 1271 pr_err("failed to read initial state for %s, error %d\n", 1272 name, sw_status); 1273 } else { 1274 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1275 if (set_default) { 1276 /* try to keep the initial state, since we ask the 1277 * firmware to preserve it across S5 in NVRAM */ 1278 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1279 } 1280 } 1281 hw_state = tpacpi_rfk_check_hwblock_state(); 1282 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1283 1284 res = rfkill_register(atp_rfk->rfkill); 1285 if (res < 0) { 1286 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1287 rfkill_destroy(atp_rfk->rfkill); 1288 kfree(atp_rfk); 1289 return res; 1290 } 1291 1292 tpacpi_rfkill_switches[id] = atp_rfk; 1293 1294 pr_info("rfkill switch %s: radio is %sblocked\n", 1295 name, (sw_state || hw_state) ? "" : "un"); 1296 return 0; 1297 } 1298 1299 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1300 { 1301 struct tpacpi_rfk *tp_rfk; 1302 1303 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1304 1305 tp_rfk = tpacpi_rfkill_switches[id]; 1306 if (tp_rfk) { 1307 rfkill_unregister(tp_rfk->rfkill); 1308 rfkill_destroy(tp_rfk->rfkill); 1309 tpacpi_rfkill_switches[id] = NULL; 1310 kfree(tp_rfk); 1311 } 1312 } 1313 1314 static void printk_deprecated_rfkill_attribute(const char * const what) 1315 { 1316 printk_deprecated_attribute(what, 1317 "Please switch to generic rfkill before year 2010"); 1318 } 1319 1320 /* sysfs <radio> enable ------------------------------------------------ */ 1321 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1322 struct device_attribute *attr, 1323 char *buf) 1324 { 1325 int status; 1326 1327 printk_deprecated_rfkill_attribute(attr->attr.name); 1328 1329 /* This is in the ABI... */ 1330 if (tpacpi_rfk_check_hwblock_state()) { 1331 status = TPACPI_RFK_RADIO_OFF; 1332 } else { 1333 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1334 if (status < 0) 1335 return status; 1336 } 1337 1338 return snprintf(buf, PAGE_SIZE, "%d\n", 1339 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1340 } 1341 1342 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1343 struct device_attribute *attr, 1344 const char *buf, size_t count) 1345 { 1346 unsigned long t; 1347 int res; 1348 1349 printk_deprecated_rfkill_attribute(attr->attr.name); 1350 1351 if (parse_strtoul(buf, 1, &t)) 1352 return -EINVAL; 1353 1354 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1355 1356 /* This is in the ABI... */ 1357 if (tpacpi_rfk_check_hwblock_state() && !!t) 1358 return -EPERM; 1359 1360 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1361 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1362 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1363 1364 return (res < 0) ? res : count; 1365 } 1366 1367 /* procfs -------------------------------------------------------------- */ 1368 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1369 { 1370 if (id >= TPACPI_RFK_SW_MAX) 1371 seq_printf(m, "status:\t\tnot supported\n"); 1372 else { 1373 int status; 1374 1375 /* This is in the ABI... */ 1376 if (tpacpi_rfk_check_hwblock_state()) { 1377 status = TPACPI_RFK_RADIO_OFF; 1378 } else { 1379 status = tpacpi_rfk_update_swstate( 1380 tpacpi_rfkill_switches[id]); 1381 if (status < 0) 1382 return status; 1383 } 1384 1385 seq_printf(m, "status:\t\t%s\n", 1386 (status == TPACPI_RFK_RADIO_ON) ? 1387 "enabled" : "disabled"); 1388 seq_printf(m, "commands:\tenable, disable\n"); 1389 } 1390 1391 return 0; 1392 } 1393 1394 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1395 { 1396 char *cmd; 1397 int status = -1; 1398 int res = 0; 1399 1400 if (id >= TPACPI_RFK_SW_MAX) 1401 return -ENODEV; 1402 1403 while ((cmd = next_cmd(&buf))) { 1404 if (strlencmp(cmd, "enable") == 0) 1405 status = TPACPI_RFK_RADIO_ON; 1406 else if (strlencmp(cmd, "disable") == 0) 1407 status = TPACPI_RFK_RADIO_OFF; 1408 else 1409 return -EINVAL; 1410 } 1411 1412 if (status != -1) { 1413 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1414 (status == TPACPI_RFK_RADIO_ON) ? 1415 "enable" : "disable", 1416 tpacpi_rfkill_names[id]); 1417 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1418 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1419 } 1420 1421 return res; 1422 } 1423 1424 /************************************************************************* 1425 * thinkpad-acpi driver attributes 1426 */ 1427 1428 /* interface_version --------------------------------------------------- */ 1429 static ssize_t tpacpi_driver_interface_version_show( 1430 struct device_driver *drv, 1431 char *buf) 1432 { 1433 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1434 } 1435 1436 static DRIVER_ATTR(interface_version, S_IRUGO, 1437 tpacpi_driver_interface_version_show, NULL); 1438 1439 /* debug_level --------------------------------------------------------- */ 1440 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1441 char *buf) 1442 { 1443 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1444 } 1445 1446 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1447 const char *buf, size_t count) 1448 { 1449 unsigned long t; 1450 1451 if (parse_strtoul(buf, 0xffff, &t)) 1452 return -EINVAL; 1453 1454 dbg_level = t; 1455 1456 return count; 1457 } 1458 1459 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1460 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1461 1462 /* version ------------------------------------------------------------- */ 1463 static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1464 char *buf) 1465 { 1466 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1467 TPACPI_DESC, TPACPI_VERSION); 1468 } 1469 1470 static DRIVER_ATTR(version, S_IRUGO, 1471 tpacpi_driver_version_show, NULL); 1472 1473 /* --------------------------------------------------------------------- */ 1474 1475 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1476 1477 /* wlsw_emulstate ------------------------------------------------------ */ 1478 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1479 char *buf) 1480 { 1481 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1482 } 1483 1484 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1485 const char *buf, size_t count) 1486 { 1487 unsigned long t; 1488 1489 if (parse_strtoul(buf, 1, &t)) 1490 return -EINVAL; 1491 1492 if (tpacpi_wlsw_emulstate != !!t) { 1493 tpacpi_wlsw_emulstate = !!t; 1494 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1495 } 1496 1497 return count; 1498 } 1499 1500 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1501 tpacpi_driver_wlsw_emulstate_show, 1502 tpacpi_driver_wlsw_emulstate_store); 1503 1504 /* bluetooth_emulstate ------------------------------------------------- */ 1505 static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1506 struct device_driver *drv, 1507 char *buf) 1508 { 1509 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1510 } 1511 1512 static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1513 struct device_driver *drv, 1514 const char *buf, size_t count) 1515 { 1516 unsigned long t; 1517 1518 if (parse_strtoul(buf, 1, &t)) 1519 return -EINVAL; 1520 1521 tpacpi_bluetooth_emulstate = !!t; 1522 1523 return count; 1524 } 1525 1526 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1527 tpacpi_driver_bluetooth_emulstate_show, 1528 tpacpi_driver_bluetooth_emulstate_store); 1529 1530 /* wwan_emulstate ------------------------------------------------- */ 1531 static ssize_t tpacpi_driver_wwan_emulstate_show( 1532 struct device_driver *drv, 1533 char *buf) 1534 { 1535 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1536 } 1537 1538 static ssize_t tpacpi_driver_wwan_emulstate_store( 1539 struct device_driver *drv, 1540 const char *buf, size_t count) 1541 { 1542 unsigned long t; 1543 1544 if (parse_strtoul(buf, 1, &t)) 1545 return -EINVAL; 1546 1547 tpacpi_wwan_emulstate = !!t; 1548 1549 return count; 1550 } 1551 1552 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1553 tpacpi_driver_wwan_emulstate_show, 1554 tpacpi_driver_wwan_emulstate_store); 1555 1556 /* uwb_emulstate ------------------------------------------------- */ 1557 static ssize_t tpacpi_driver_uwb_emulstate_show( 1558 struct device_driver *drv, 1559 char *buf) 1560 { 1561 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1562 } 1563 1564 static ssize_t tpacpi_driver_uwb_emulstate_store( 1565 struct device_driver *drv, 1566 const char *buf, size_t count) 1567 { 1568 unsigned long t; 1569 1570 if (parse_strtoul(buf, 1, &t)) 1571 return -EINVAL; 1572 1573 tpacpi_uwb_emulstate = !!t; 1574 1575 return count; 1576 } 1577 1578 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1579 tpacpi_driver_uwb_emulstate_show, 1580 tpacpi_driver_uwb_emulstate_store); 1581 #endif 1582 1583 /* --------------------------------------------------------------------- */ 1584 1585 static struct driver_attribute *tpacpi_driver_attributes[] = { 1586 &driver_attr_debug_level, &driver_attr_version, 1587 &driver_attr_interface_version, 1588 }; 1589 1590 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1591 { 1592 int i, res; 1593 1594 i = 0; 1595 res = 0; 1596 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1597 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1598 i++; 1599 } 1600 1601 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1602 if (!res && dbg_wlswemul) 1603 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1604 if (!res && dbg_bluetoothemul) 1605 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1606 if (!res && dbg_wwanemul) 1607 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1608 if (!res && dbg_uwbemul) 1609 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1610 #endif 1611 1612 return res; 1613 } 1614 1615 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1616 { 1617 int i; 1618 1619 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1620 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1621 1622 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1623 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1624 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1625 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1626 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1627 #endif 1628 } 1629 1630 /************************************************************************* 1631 * Firmware Data 1632 */ 1633 1634 /* 1635 * Table of recommended minimum BIOS versions 1636 * 1637 * Reasons for listing: 1638 * 1. Stable BIOS, listed because the unknown amount of 1639 * bugs and bad ACPI behaviour on older versions 1640 * 1641 * 2. BIOS or EC fw with known bugs that trigger on Linux 1642 * 1643 * 3. BIOS with known reduced functionality in older versions 1644 * 1645 * We recommend the latest BIOS and EC version. 1646 * We only support the latest BIOS and EC fw version as a rule. 1647 * 1648 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1649 * Information from users in ThinkWiki 1650 * 1651 * WARNING: we use this table also to detect that the machine is 1652 * a ThinkPad in some cases, so don't remove entries lightly. 1653 */ 1654 1655 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1656 { .vendor = (__v), \ 1657 .bios = TPID(__id1, __id2), \ 1658 .ec = TPACPI_MATCH_ANY, \ 1659 .quirks = TPACPI_MATCH_ANY << 16 \ 1660 | (__bv1) << 8 | (__bv2) } 1661 1662 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1663 __eid, __ev1, __ev2) \ 1664 { .vendor = (__v), \ 1665 .bios = TPID(__bid1, __bid2), \ 1666 .ec = __eid, \ 1667 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1668 | (__bv1) << 8 | (__bv2) } 1669 1670 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1671 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1672 1673 /* Outdated IBM BIOSes often lack the EC id string */ 1674 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1675 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1676 __bv1, __bv2, TPID(__id1, __id2), \ 1677 __ev1, __ev2), \ 1678 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1679 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1680 __ev1, __ev2) 1681 1682 /* Outdated IBM BIOSes often lack the EC id string */ 1683 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1684 __eid1, __eid2, __ev1, __ev2) \ 1685 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1686 __bv1, __bv2, TPID(__eid1, __eid2), \ 1687 __ev1, __ev2), \ 1688 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1689 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1690 __ev1, __ev2) 1691 1692 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1693 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1694 1695 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1696 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1697 __bv1, __bv2, TPID(__id1, __id2), \ 1698 __ev1, __ev2) 1699 1700 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1701 __eid1, __eid2, __ev1, __ev2) \ 1702 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1703 __bv1, __bv2, TPID(__eid1, __eid2), \ 1704 __ev1, __ev2) 1705 1706 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1707 /* Numeric models ------------------ */ 1708 /* FW MODEL BIOS VERS */ 1709 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1710 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1711 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1712 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1713 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1714 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1715 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1716 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1717 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1718 1719 /* A-series ------------------------- */ 1720 /* FW MODEL BIOS VERS EC VERS */ 1721 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1722 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1723 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1724 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1725 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1726 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1727 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1728 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1729 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1730 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1731 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1732 1733 /* G-series ------------------------- */ 1734 /* FW MODEL BIOS VERS */ 1735 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1736 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1737 1738 /* R-series, T-series --------------- */ 1739 /* FW MODEL BIOS VERS EC VERS */ 1740 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1741 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1742 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1743 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1744 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1745 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1746 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1747 T40/p, T41/p, T42/p (1) */ 1748 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1749 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1750 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1751 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1752 1753 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1754 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1755 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1756 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1757 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1758 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1759 1760 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1761 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1762 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1763 1764 /* BIOS FW BIOS VERS EC FW EC VERS */ 1765 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1766 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1767 1768 /* X-series ------------------------- */ 1769 /* FW MODEL BIOS VERS EC VERS */ 1770 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1771 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1772 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1773 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1774 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1775 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1776 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1777 1778 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1779 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1780 1781 /* (0) - older versions lack DMI EC fw string and functionality */ 1782 /* (1) - older versions known to lack functionality */ 1783 }; 1784 1785 #undef TPV_QL1 1786 #undef TPV_QL0 1787 #undef TPV_QI2 1788 #undef TPV_QI1 1789 #undef TPV_QI0 1790 #undef TPV_Q_X 1791 #undef TPV_Q 1792 1793 static void __init tpacpi_check_outdated_fw(void) 1794 { 1795 unsigned long fwvers; 1796 u16 ec_version, bios_version; 1797 1798 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1799 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1800 1801 if (!fwvers) 1802 return; 1803 1804 bios_version = fwvers & 0xffffU; 1805 ec_version = (fwvers >> 16) & 0xffffU; 1806 1807 /* note that unknown versions are set to 0x0000 and we use that */ 1808 if ((bios_version > thinkpad_id.bios_release) || 1809 (ec_version > thinkpad_id.ec_release && 1810 ec_version != TPACPI_MATCH_ANY)) { 1811 /* 1812 * The changelogs would let us track down the exact 1813 * reason, but it is just too much of a pain to track 1814 * it. We only list BIOSes that are either really 1815 * broken, or really stable to begin with, so it is 1816 * best if the user upgrades the firmware anyway. 1817 */ 1818 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1819 pr_warn("WARNING: This firmware may be missing critical bug " 1820 "fixes and/or important features\n"); 1821 } 1822 } 1823 1824 static bool __init tpacpi_is_fw_known(void) 1825 { 1826 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1827 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1828 } 1829 1830 /**************************************************************************** 1831 **************************************************************************** 1832 * 1833 * Subdrivers 1834 * 1835 **************************************************************************** 1836 ****************************************************************************/ 1837 1838 /************************************************************************* 1839 * thinkpad-acpi metadata subdriver 1840 */ 1841 1842 static int thinkpad_acpi_driver_read(struct seq_file *m) 1843 { 1844 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1845 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1846 return 0; 1847 } 1848 1849 static struct ibm_struct thinkpad_acpi_driver_data = { 1850 .name = "driver", 1851 .read = thinkpad_acpi_driver_read, 1852 }; 1853 1854 /************************************************************************* 1855 * Hotkey subdriver 1856 */ 1857 1858 /* 1859 * ThinkPad firmware event model 1860 * 1861 * The ThinkPad firmware has two main event interfaces: normal ACPI 1862 * notifications (which follow the ACPI standard), and a private event 1863 * interface. 1864 * 1865 * The private event interface also issues events for the hotkeys. As 1866 * the driver gained features, the event handling code ended up being 1867 * built around the hotkey subdriver. This will need to be refactored 1868 * to a more formal event API eventually. 1869 * 1870 * Some "hotkeys" are actually supposed to be used as event reports, 1871 * such as "brightness has changed", "volume has changed", depending on 1872 * the ThinkPad model and how the firmware is operating. 1873 * 1874 * Unlike other classes, hotkey-class events have mask/unmask control on 1875 * non-ancient firmware. However, how it behaves changes a lot with the 1876 * firmware model and version. 1877 */ 1878 1879 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1880 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1881 TP_ACPI_HOTKEYSCAN_FNF2, 1882 TP_ACPI_HOTKEYSCAN_FNF3, 1883 TP_ACPI_HOTKEYSCAN_FNF4, 1884 TP_ACPI_HOTKEYSCAN_FNF5, 1885 TP_ACPI_HOTKEYSCAN_FNF6, 1886 TP_ACPI_HOTKEYSCAN_FNF7, 1887 TP_ACPI_HOTKEYSCAN_FNF8, 1888 TP_ACPI_HOTKEYSCAN_FNF9, 1889 TP_ACPI_HOTKEYSCAN_FNF10, 1890 TP_ACPI_HOTKEYSCAN_FNF11, 1891 TP_ACPI_HOTKEYSCAN_FNF12, 1892 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1893 TP_ACPI_HOTKEYSCAN_FNINSERT, 1894 TP_ACPI_HOTKEYSCAN_FNDELETE, 1895 TP_ACPI_HOTKEYSCAN_FNHOME, 1896 TP_ACPI_HOTKEYSCAN_FNEND, 1897 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1898 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1899 TP_ACPI_HOTKEYSCAN_FNSPACE, 1900 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1901 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1902 TP_ACPI_HOTKEYSCAN_MUTE, 1903 TP_ACPI_HOTKEYSCAN_THINKPAD, 1904 TP_ACPI_HOTKEYSCAN_UNK1, 1905 TP_ACPI_HOTKEYSCAN_UNK2, 1906 TP_ACPI_HOTKEYSCAN_UNK3, 1907 TP_ACPI_HOTKEYSCAN_UNK4, 1908 TP_ACPI_HOTKEYSCAN_UNK5, 1909 TP_ACPI_HOTKEYSCAN_UNK6, 1910 TP_ACPI_HOTKEYSCAN_UNK7, 1911 TP_ACPI_HOTKEYSCAN_UNK8, 1912 1913 /* Hotkey keymap size */ 1914 TPACPI_HOTKEY_MAP_LEN 1915 }; 1916 1917 enum { /* Keys/events available through NVRAM polling */ 1918 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1919 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1920 }; 1921 1922 enum { /* Positions of some of the keys in hotkey masks */ 1923 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1924 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1925 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1926 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1927 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1928 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1929 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1930 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1931 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1932 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1933 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1934 }; 1935 1936 enum { /* NVRAM to ACPI HKEY group map */ 1937 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1938 TP_ACPI_HKEY_ZOOM_MASK | 1939 TP_ACPI_HKEY_DISPSWTCH_MASK | 1940 TP_ACPI_HKEY_HIBERNATE_MASK, 1941 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1942 TP_ACPI_HKEY_BRGHTDWN_MASK, 1943 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1944 TP_ACPI_HKEY_VOLDWN_MASK | 1945 TP_ACPI_HKEY_MUTE_MASK, 1946 }; 1947 1948 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1949 struct tp_nvram_state { 1950 u16 thinkpad_toggle:1; 1951 u16 zoom_toggle:1; 1952 u16 display_toggle:1; 1953 u16 thinklight_toggle:1; 1954 u16 hibernate_toggle:1; 1955 u16 displayexp_toggle:1; 1956 u16 display_state:1; 1957 u16 brightness_toggle:1; 1958 u16 volume_toggle:1; 1959 u16 mute:1; 1960 1961 u8 brightness_level; 1962 u8 volume_level; 1963 }; 1964 1965 /* kthread for the hotkey poller */ 1966 static struct task_struct *tpacpi_hotkey_task; 1967 1968 /* 1969 * Acquire mutex to write poller control variables as an 1970 * atomic block. 1971 * 1972 * Increment hotkey_config_change when changing them if you 1973 * want the kthread to forget old state. 1974 * 1975 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1976 */ 1977 static struct mutex hotkey_thread_data_mutex; 1978 static unsigned int hotkey_config_change; 1979 1980 /* 1981 * hotkey poller control variables 1982 * 1983 * Must be atomic or readers will also need to acquire mutex 1984 * 1985 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1986 * should be used only when the changes need to be taken as 1987 * a block, OR when one needs to force the kthread to forget 1988 * old state. 1989 */ 1990 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 1991 static unsigned int hotkey_poll_freq = 10; /* Hz */ 1992 1993 #define HOTKEY_CONFIG_CRITICAL_START \ 1994 do { \ 1995 mutex_lock(&hotkey_thread_data_mutex); \ 1996 hotkey_config_change++; \ 1997 } while (0); 1998 #define HOTKEY_CONFIG_CRITICAL_END \ 1999 mutex_unlock(&hotkey_thread_data_mutex); 2000 2001 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2002 2003 #define hotkey_source_mask 0U 2004 #define HOTKEY_CONFIG_CRITICAL_START 2005 #define HOTKEY_CONFIG_CRITICAL_END 2006 2007 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2008 2009 static struct mutex hotkey_mutex; 2010 2011 static enum { /* Reasons for waking up */ 2012 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2013 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2014 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2015 } hotkey_wakeup_reason; 2016 2017 static int hotkey_autosleep_ack; 2018 2019 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2020 static u32 hotkey_all_mask; /* all events supported in fw */ 2021 static u32 hotkey_reserved_mask; /* events better left disabled */ 2022 static u32 hotkey_driver_mask; /* events needed by the driver */ 2023 static u32 hotkey_user_mask; /* events visible to userspace */ 2024 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2025 2026 static u16 *hotkey_keycode_map; 2027 2028 static struct attribute_set *hotkey_dev_attributes; 2029 2030 static void tpacpi_driver_event(const unsigned int hkey_event); 2031 static void hotkey_driver_event(const unsigned int scancode); 2032 static void hotkey_poll_setup(const bool may_warn); 2033 2034 /* HKEY.MHKG() return bits */ 2035 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2036 2037 static int hotkey_get_wlsw(void) 2038 { 2039 int status; 2040 2041 if (!tp_features.hotkey_wlsw) 2042 return -ENODEV; 2043 2044 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2045 if (dbg_wlswemul) 2046 return (tpacpi_wlsw_emulstate) ? 2047 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2048 #endif 2049 2050 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2051 return -EIO; 2052 2053 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2054 } 2055 2056 static int hotkey_get_tablet_mode(int *status) 2057 { 2058 int s; 2059 2060 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2061 return -EIO; 2062 2063 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2064 return 0; 2065 } 2066 2067 /* 2068 * Reads current event mask from firmware, and updates 2069 * hotkey_acpi_mask accordingly. Also resets any bits 2070 * from hotkey_user_mask that are unavailable to be 2071 * delivered (shadow requirement of the userspace ABI). 2072 * 2073 * Call with hotkey_mutex held 2074 */ 2075 static int hotkey_mask_get(void) 2076 { 2077 if (tp_features.hotkey_mask) { 2078 u32 m = 0; 2079 2080 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2081 return -EIO; 2082 2083 hotkey_acpi_mask = m; 2084 } else { 2085 /* no mask support doesn't mean no event support... */ 2086 hotkey_acpi_mask = hotkey_all_mask; 2087 } 2088 2089 /* sync userspace-visible mask */ 2090 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2091 2092 return 0; 2093 } 2094 2095 void static hotkey_mask_warn_incomplete_mask(void) 2096 { 2097 /* log only what the user can fix... */ 2098 const u32 wantedmask = hotkey_driver_mask & 2099 ~(hotkey_acpi_mask | hotkey_source_mask) & 2100 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2101 2102 if (wantedmask) 2103 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2104 } 2105 2106 /* 2107 * Set the firmware mask when supported 2108 * 2109 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2110 * 2111 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2112 * 2113 * Call with hotkey_mutex held 2114 */ 2115 static int hotkey_mask_set(u32 mask) 2116 { 2117 int i; 2118 int rc = 0; 2119 2120 const u32 fwmask = mask & ~hotkey_source_mask; 2121 2122 if (tp_features.hotkey_mask) { 2123 for (i = 0; i < 32; i++) { 2124 if (!acpi_evalf(hkey_handle, 2125 NULL, "MHKM", "vdd", i + 1, 2126 !!(mask & (1 << i)))) { 2127 rc = -EIO; 2128 break; 2129 } 2130 } 2131 } 2132 2133 /* 2134 * We *must* make an inconditional call to hotkey_mask_get to 2135 * refresh hotkey_acpi_mask and update hotkey_user_mask 2136 * 2137 * Take the opportunity to also log when we cannot _enable_ 2138 * a given event. 2139 */ 2140 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2141 pr_notice("asked for hotkey mask 0x%08x, but " 2142 "firmware forced it to 0x%08x\n", 2143 fwmask, hotkey_acpi_mask); 2144 } 2145 2146 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2147 hotkey_mask_warn_incomplete_mask(); 2148 2149 return rc; 2150 } 2151 2152 /* 2153 * Sets hotkey_user_mask and tries to set the firmware mask 2154 * 2155 * Call with hotkey_mutex held 2156 */ 2157 static int hotkey_user_mask_set(const u32 mask) 2158 { 2159 int rc; 2160 2161 /* Give people a chance to notice they are doing something that 2162 * is bound to go boom on their users sooner or later */ 2163 if (!tp_warned.hotkey_mask_ff && 2164 (mask == 0xffff || mask == 0xffffff || 2165 mask == 0xffffffff)) { 2166 tp_warned.hotkey_mask_ff = 1; 2167 pr_notice("setting the hotkey mask to 0x%08x is likely " 2168 "not the best way to go about it\n", mask); 2169 pr_notice("please consider using the driver defaults, " 2170 "and refer to up-to-date thinkpad-acpi " 2171 "documentation\n"); 2172 } 2173 2174 /* Try to enable what the user asked for, plus whatever we need. 2175 * this syncs everything but won't enable bits in hotkey_user_mask */ 2176 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2177 2178 /* Enable the available bits in hotkey_user_mask */ 2179 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2180 2181 return rc; 2182 } 2183 2184 /* 2185 * Sets the driver hotkey mask. 2186 * 2187 * Can be called even if the hotkey subdriver is inactive 2188 */ 2189 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2190 { 2191 int rc; 2192 2193 /* Do the right thing if hotkey_init has not been called yet */ 2194 if (!tp_features.hotkey) { 2195 hotkey_driver_mask = mask; 2196 return 0; 2197 } 2198 2199 mutex_lock(&hotkey_mutex); 2200 2201 HOTKEY_CONFIG_CRITICAL_START 2202 hotkey_driver_mask = mask; 2203 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2204 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2205 #endif 2206 HOTKEY_CONFIG_CRITICAL_END 2207 2208 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2209 ~hotkey_source_mask); 2210 hotkey_poll_setup(true); 2211 2212 mutex_unlock(&hotkey_mutex); 2213 2214 return rc; 2215 } 2216 2217 static int hotkey_status_get(int *status) 2218 { 2219 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2220 return -EIO; 2221 2222 return 0; 2223 } 2224 2225 static int hotkey_status_set(bool enable) 2226 { 2227 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2228 return -EIO; 2229 2230 return 0; 2231 } 2232 2233 static void tpacpi_input_send_tabletsw(void) 2234 { 2235 int state; 2236 2237 if (tp_features.hotkey_tablet && 2238 !hotkey_get_tablet_mode(&state)) { 2239 mutex_lock(&tpacpi_inputdev_send_mutex); 2240 2241 input_report_switch(tpacpi_inputdev, 2242 SW_TABLET_MODE, !!state); 2243 input_sync(tpacpi_inputdev); 2244 2245 mutex_unlock(&tpacpi_inputdev_send_mutex); 2246 } 2247 } 2248 2249 /* Do NOT call without validating scancode first */ 2250 static void tpacpi_input_send_key(const unsigned int scancode) 2251 { 2252 const unsigned int keycode = hotkey_keycode_map[scancode]; 2253 2254 if (keycode != KEY_RESERVED) { 2255 mutex_lock(&tpacpi_inputdev_send_mutex); 2256 2257 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2258 input_report_key(tpacpi_inputdev, keycode, 1); 2259 input_sync(tpacpi_inputdev); 2260 2261 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2262 input_report_key(tpacpi_inputdev, keycode, 0); 2263 input_sync(tpacpi_inputdev); 2264 2265 mutex_unlock(&tpacpi_inputdev_send_mutex); 2266 } 2267 } 2268 2269 /* Do NOT call without validating scancode first */ 2270 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2271 { 2272 hotkey_driver_event(scancode); 2273 if (hotkey_user_mask & (1 << scancode)) 2274 tpacpi_input_send_key(scancode); 2275 } 2276 2277 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2278 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2279 2280 /* Do NOT call without validating scancode first */ 2281 static void tpacpi_hotkey_send_key(unsigned int scancode) 2282 { 2283 tpacpi_input_send_key_masked(scancode); 2284 } 2285 2286 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2287 { 2288 u8 d; 2289 2290 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2291 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2292 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2293 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2294 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2295 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2296 } 2297 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2298 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2299 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2300 } 2301 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2302 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2303 n->displayexp_toggle = 2304 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2305 } 2306 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2307 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2308 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2309 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2310 n->brightness_toggle = 2311 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2312 } 2313 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2314 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2315 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2316 >> TP_NVRAM_POS_LEVEL_VOLUME; 2317 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2318 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2319 } 2320 } 2321 2322 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2323 do { \ 2324 if ((event_mask & (1 << __scancode)) && \ 2325 oldn->__member != newn->__member) \ 2326 tpacpi_hotkey_send_key(__scancode); \ 2327 } while (0) 2328 2329 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2330 do { \ 2331 if (event_mask & (1 << __scancode)) \ 2332 tpacpi_hotkey_send_key(__scancode); \ 2333 } while (0) 2334 2335 static void issue_volchange(const unsigned int oldvol, 2336 const unsigned int newvol, 2337 const u32 event_mask) 2338 { 2339 unsigned int i = oldvol; 2340 2341 while (i > newvol) { 2342 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2343 i--; 2344 } 2345 while (i < newvol) { 2346 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2347 i++; 2348 } 2349 } 2350 2351 static void issue_brightnesschange(const unsigned int oldbrt, 2352 const unsigned int newbrt, 2353 const u32 event_mask) 2354 { 2355 unsigned int i = oldbrt; 2356 2357 while (i > newbrt) { 2358 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2359 i--; 2360 } 2361 while (i < newbrt) { 2362 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2363 i++; 2364 } 2365 } 2366 2367 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2368 struct tp_nvram_state *newn, 2369 const u32 event_mask) 2370 { 2371 2372 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2373 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2374 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2375 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2376 2377 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2378 2379 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2380 2381 /* 2382 * Handle volume 2383 * 2384 * This code is supposed to duplicate the IBM firmware behaviour: 2385 * - Pressing MUTE issues mute hotkey message, even when already mute 2386 * - Pressing Volume up/down issues volume up/down hotkey messages, 2387 * even when already at maximum or minimum volume 2388 * - The act of unmuting issues volume up/down notification, 2389 * depending which key was used to unmute 2390 * 2391 * We are constrained to what the NVRAM can tell us, which is not much 2392 * and certainly not enough if more than one volume hotkey was pressed 2393 * since the last poll cycle. 2394 * 2395 * Just to make our life interesting, some newer Lenovo ThinkPads have 2396 * bugs in the BIOS and may fail to update volume_toggle properly. 2397 */ 2398 if (newn->mute) { 2399 /* muted */ 2400 if (!oldn->mute || 2401 oldn->volume_toggle != newn->volume_toggle || 2402 oldn->volume_level != newn->volume_level) { 2403 /* recently muted, or repeated mute keypress, or 2404 * multiple presses ending in mute */ 2405 issue_volchange(oldn->volume_level, newn->volume_level, 2406 event_mask); 2407 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2408 } 2409 } else { 2410 /* unmute */ 2411 if (oldn->mute) { 2412 /* recently unmuted, issue 'unmute' keypress */ 2413 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2414 } 2415 if (oldn->volume_level != newn->volume_level) { 2416 issue_volchange(oldn->volume_level, newn->volume_level, 2417 event_mask); 2418 } else if (oldn->volume_toggle != newn->volume_toggle) { 2419 /* repeated vol up/down keypress at end of scale ? */ 2420 if (newn->volume_level == 0) 2421 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2422 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2423 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2424 } 2425 } 2426 2427 /* handle brightness */ 2428 if (oldn->brightness_level != newn->brightness_level) { 2429 issue_brightnesschange(oldn->brightness_level, 2430 newn->brightness_level, event_mask); 2431 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2432 /* repeated key presses that didn't change state */ 2433 if (newn->brightness_level == 0) 2434 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2435 else if (newn->brightness_level >= bright_maxlvl 2436 && !tp_features.bright_unkfw) 2437 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2438 } 2439 2440 #undef TPACPI_COMPARE_KEY 2441 #undef TPACPI_MAY_SEND_KEY 2442 } 2443 2444 /* 2445 * Polling driver 2446 * 2447 * We track all events in hotkey_source_mask all the time, since 2448 * most of them are edge-based. We only issue those requested by 2449 * hotkey_user_mask or hotkey_driver_mask, though. 2450 */ 2451 static int hotkey_kthread(void *data) 2452 { 2453 struct tp_nvram_state s[2]; 2454 u32 poll_mask, event_mask; 2455 unsigned int si, so; 2456 unsigned long t; 2457 unsigned int change_detector; 2458 unsigned int poll_freq; 2459 bool was_frozen; 2460 2461 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2462 goto exit; 2463 2464 set_freezable(); 2465 2466 so = 0; 2467 si = 1; 2468 t = 0; 2469 2470 /* Initial state for compares */ 2471 mutex_lock(&hotkey_thread_data_mutex); 2472 change_detector = hotkey_config_change; 2473 poll_mask = hotkey_source_mask; 2474 event_mask = hotkey_source_mask & 2475 (hotkey_driver_mask | hotkey_user_mask); 2476 poll_freq = hotkey_poll_freq; 2477 mutex_unlock(&hotkey_thread_data_mutex); 2478 hotkey_read_nvram(&s[so], poll_mask); 2479 2480 while (!kthread_should_stop()) { 2481 if (t == 0) { 2482 if (likely(poll_freq)) 2483 t = 1000/poll_freq; 2484 else 2485 t = 100; /* should never happen... */ 2486 } 2487 t = msleep_interruptible(t); 2488 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2489 break; 2490 2491 if (t > 0 && !was_frozen) 2492 continue; 2493 2494 mutex_lock(&hotkey_thread_data_mutex); 2495 if (was_frozen || hotkey_config_change != change_detector) { 2496 /* forget old state on thaw or config change */ 2497 si = so; 2498 t = 0; 2499 change_detector = hotkey_config_change; 2500 } 2501 poll_mask = hotkey_source_mask; 2502 event_mask = hotkey_source_mask & 2503 (hotkey_driver_mask | hotkey_user_mask); 2504 poll_freq = hotkey_poll_freq; 2505 mutex_unlock(&hotkey_thread_data_mutex); 2506 2507 if (likely(poll_mask)) { 2508 hotkey_read_nvram(&s[si], poll_mask); 2509 if (likely(si != so)) { 2510 hotkey_compare_and_issue_event(&s[so], &s[si], 2511 event_mask); 2512 } 2513 } 2514 2515 so = si; 2516 si ^= 1; 2517 } 2518 2519 exit: 2520 return 0; 2521 } 2522 2523 /* call with hotkey_mutex held */ 2524 static void hotkey_poll_stop_sync(void) 2525 { 2526 if (tpacpi_hotkey_task) { 2527 kthread_stop(tpacpi_hotkey_task); 2528 tpacpi_hotkey_task = NULL; 2529 } 2530 } 2531 2532 /* call with hotkey_mutex held */ 2533 static void hotkey_poll_setup(const bool may_warn) 2534 { 2535 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2536 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2537 2538 if (hotkey_poll_freq > 0 && 2539 (poll_driver_mask || 2540 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2541 if (!tpacpi_hotkey_task) { 2542 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2543 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2544 if (IS_ERR(tpacpi_hotkey_task)) { 2545 tpacpi_hotkey_task = NULL; 2546 pr_err("could not create kernel thread " 2547 "for hotkey polling\n"); 2548 } 2549 } 2550 } else { 2551 hotkey_poll_stop_sync(); 2552 if (may_warn && (poll_driver_mask || poll_user_mask) && 2553 hotkey_poll_freq == 0) { 2554 pr_notice("hot keys 0x%08x and/or events 0x%08x " 2555 "require polling, which is currently " 2556 "disabled\n", 2557 poll_user_mask, poll_driver_mask); 2558 } 2559 } 2560 } 2561 2562 static void hotkey_poll_setup_safe(const bool may_warn) 2563 { 2564 mutex_lock(&hotkey_mutex); 2565 hotkey_poll_setup(may_warn); 2566 mutex_unlock(&hotkey_mutex); 2567 } 2568 2569 /* call with hotkey_mutex held */ 2570 static void hotkey_poll_set_freq(unsigned int freq) 2571 { 2572 if (!freq) 2573 hotkey_poll_stop_sync(); 2574 2575 hotkey_poll_freq = freq; 2576 } 2577 2578 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2579 2580 static void hotkey_poll_setup(const bool __unused) 2581 { 2582 } 2583 2584 static void hotkey_poll_setup_safe(const bool __unused) 2585 { 2586 } 2587 2588 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2589 2590 static int hotkey_inputdev_open(struct input_dev *dev) 2591 { 2592 switch (tpacpi_lifecycle) { 2593 case TPACPI_LIFE_INIT: 2594 case TPACPI_LIFE_RUNNING: 2595 hotkey_poll_setup_safe(false); 2596 return 0; 2597 case TPACPI_LIFE_EXITING: 2598 return -EBUSY; 2599 } 2600 2601 /* Should only happen if tpacpi_lifecycle is corrupt */ 2602 BUG(); 2603 return -EBUSY; 2604 } 2605 2606 static void hotkey_inputdev_close(struct input_dev *dev) 2607 { 2608 /* disable hotkey polling when possible */ 2609 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2610 !(hotkey_source_mask & hotkey_driver_mask)) 2611 hotkey_poll_setup_safe(false); 2612 } 2613 2614 /* sysfs hotkey enable ------------------------------------------------- */ 2615 static ssize_t hotkey_enable_show(struct device *dev, 2616 struct device_attribute *attr, 2617 char *buf) 2618 { 2619 int res, status; 2620 2621 printk_deprecated_attribute("hotkey_enable", 2622 "Hotkey reporting is always enabled"); 2623 2624 res = hotkey_status_get(&status); 2625 if (res) 2626 return res; 2627 2628 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2629 } 2630 2631 static ssize_t hotkey_enable_store(struct device *dev, 2632 struct device_attribute *attr, 2633 const char *buf, size_t count) 2634 { 2635 unsigned long t; 2636 2637 printk_deprecated_attribute("hotkey_enable", 2638 "Hotkeys can be disabled through hotkey_mask"); 2639 2640 if (parse_strtoul(buf, 1, &t)) 2641 return -EINVAL; 2642 2643 if (t == 0) 2644 return -EPERM; 2645 2646 return count; 2647 } 2648 2649 static struct device_attribute dev_attr_hotkey_enable = 2650 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO, 2651 hotkey_enable_show, hotkey_enable_store); 2652 2653 /* sysfs hotkey mask --------------------------------------------------- */ 2654 static ssize_t hotkey_mask_show(struct device *dev, 2655 struct device_attribute *attr, 2656 char *buf) 2657 { 2658 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2659 } 2660 2661 static ssize_t hotkey_mask_store(struct device *dev, 2662 struct device_attribute *attr, 2663 const char *buf, size_t count) 2664 { 2665 unsigned long t; 2666 int res; 2667 2668 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2669 return -EINVAL; 2670 2671 if (mutex_lock_killable(&hotkey_mutex)) 2672 return -ERESTARTSYS; 2673 2674 res = hotkey_user_mask_set(t); 2675 2676 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2677 hotkey_poll_setup(true); 2678 #endif 2679 2680 mutex_unlock(&hotkey_mutex); 2681 2682 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2683 2684 return (res) ? res : count; 2685 } 2686 2687 static struct device_attribute dev_attr_hotkey_mask = 2688 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO, 2689 hotkey_mask_show, hotkey_mask_store); 2690 2691 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2692 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2693 struct device_attribute *attr, 2694 char *buf) 2695 { 2696 return sprintf(buf, "0\n"); 2697 } 2698 2699 static struct device_attribute dev_attr_hotkey_bios_enabled = 2700 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL); 2701 2702 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2703 static ssize_t hotkey_bios_mask_show(struct device *dev, 2704 struct device_attribute *attr, 2705 char *buf) 2706 { 2707 printk_deprecated_attribute("hotkey_bios_mask", 2708 "This attribute is useless."); 2709 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2710 } 2711 2712 static struct device_attribute dev_attr_hotkey_bios_mask = 2713 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL); 2714 2715 /* sysfs hotkey all_mask ----------------------------------------------- */ 2716 static ssize_t hotkey_all_mask_show(struct device *dev, 2717 struct device_attribute *attr, 2718 char *buf) 2719 { 2720 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2721 hotkey_all_mask | hotkey_source_mask); 2722 } 2723 2724 static struct device_attribute dev_attr_hotkey_all_mask = 2725 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL); 2726 2727 /* sysfs hotkey recommended_mask --------------------------------------- */ 2728 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2729 struct device_attribute *attr, 2730 char *buf) 2731 { 2732 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2733 (hotkey_all_mask | hotkey_source_mask) 2734 & ~hotkey_reserved_mask); 2735 } 2736 2737 static struct device_attribute dev_attr_hotkey_recommended_mask = 2738 __ATTR(hotkey_recommended_mask, S_IRUGO, 2739 hotkey_recommended_mask_show, NULL); 2740 2741 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2742 2743 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2744 static ssize_t hotkey_source_mask_show(struct device *dev, 2745 struct device_attribute *attr, 2746 char *buf) 2747 { 2748 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2749 } 2750 2751 static ssize_t hotkey_source_mask_store(struct device *dev, 2752 struct device_attribute *attr, 2753 const char *buf, size_t count) 2754 { 2755 unsigned long t; 2756 u32 r_ev; 2757 int rc; 2758 2759 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2760 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2761 return -EINVAL; 2762 2763 if (mutex_lock_killable(&hotkey_mutex)) 2764 return -ERESTARTSYS; 2765 2766 HOTKEY_CONFIG_CRITICAL_START 2767 hotkey_source_mask = t; 2768 HOTKEY_CONFIG_CRITICAL_END 2769 2770 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2771 ~hotkey_source_mask); 2772 hotkey_poll_setup(true); 2773 2774 /* check if events needed by the driver got disabled */ 2775 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2776 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2777 2778 mutex_unlock(&hotkey_mutex); 2779 2780 if (rc < 0) 2781 pr_err("hotkey_source_mask: " 2782 "failed to update the firmware event mask!\n"); 2783 2784 if (r_ev) 2785 pr_notice("hotkey_source_mask: " 2786 "some important events were disabled: 0x%04x\n", 2787 r_ev); 2788 2789 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2790 2791 return (rc < 0) ? rc : count; 2792 } 2793 2794 static struct device_attribute dev_attr_hotkey_source_mask = 2795 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO, 2796 hotkey_source_mask_show, hotkey_source_mask_store); 2797 2798 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2799 static ssize_t hotkey_poll_freq_show(struct device *dev, 2800 struct device_attribute *attr, 2801 char *buf) 2802 { 2803 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2804 } 2805 2806 static ssize_t hotkey_poll_freq_store(struct device *dev, 2807 struct device_attribute *attr, 2808 const char *buf, size_t count) 2809 { 2810 unsigned long t; 2811 2812 if (parse_strtoul(buf, 25, &t)) 2813 return -EINVAL; 2814 2815 if (mutex_lock_killable(&hotkey_mutex)) 2816 return -ERESTARTSYS; 2817 2818 hotkey_poll_set_freq(t); 2819 hotkey_poll_setup(true); 2820 2821 mutex_unlock(&hotkey_mutex); 2822 2823 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2824 2825 return count; 2826 } 2827 2828 static struct device_attribute dev_attr_hotkey_poll_freq = 2829 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO, 2830 hotkey_poll_freq_show, hotkey_poll_freq_store); 2831 2832 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2833 2834 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2835 static ssize_t hotkey_radio_sw_show(struct device *dev, 2836 struct device_attribute *attr, 2837 char *buf) 2838 { 2839 int res; 2840 res = hotkey_get_wlsw(); 2841 if (res < 0) 2842 return res; 2843 2844 /* Opportunistic update */ 2845 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2846 2847 return snprintf(buf, PAGE_SIZE, "%d\n", 2848 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2849 } 2850 2851 static struct device_attribute dev_attr_hotkey_radio_sw = 2852 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL); 2853 2854 static void hotkey_radio_sw_notify_change(void) 2855 { 2856 if (tp_features.hotkey_wlsw) 2857 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2858 "hotkey_radio_sw"); 2859 } 2860 2861 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2862 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2863 struct device_attribute *attr, 2864 char *buf) 2865 { 2866 int res, s; 2867 res = hotkey_get_tablet_mode(&s); 2868 if (res < 0) 2869 return res; 2870 2871 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2872 } 2873 2874 static struct device_attribute dev_attr_hotkey_tablet_mode = 2875 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL); 2876 2877 static void hotkey_tablet_mode_notify_change(void) 2878 { 2879 if (tp_features.hotkey_tablet) 2880 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2881 "hotkey_tablet_mode"); 2882 } 2883 2884 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2885 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2886 struct device_attribute *attr, 2887 char *buf) 2888 { 2889 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2890 } 2891 2892 static struct device_attribute dev_attr_hotkey_wakeup_reason = 2893 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2894 2895 static void hotkey_wakeup_reason_notify_change(void) 2896 { 2897 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2898 "wakeup_reason"); 2899 } 2900 2901 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2902 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2903 struct device_attribute *attr, 2904 char *buf) 2905 { 2906 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2907 } 2908 2909 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete = 2910 __ATTR(wakeup_hotunplug_complete, S_IRUGO, 2911 hotkey_wakeup_hotunplug_complete_show, NULL); 2912 2913 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2914 { 2915 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2916 "wakeup_hotunplug_complete"); 2917 } 2918 2919 /* --------------------------------------------------------------------- */ 2920 2921 static struct attribute *hotkey_attributes[] __initdata = { 2922 &dev_attr_hotkey_enable.attr, 2923 &dev_attr_hotkey_bios_enabled.attr, 2924 &dev_attr_hotkey_bios_mask.attr, 2925 &dev_attr_hotkey_wakeup_reason.attr, 2926 &dev_attr_hotkey_wakeup_hotunplug_complete.attr, 2927 &dev_attr_hotkey_mask.attr, 2928 &dev_attr_hotkey_all_mask.attr, 2929 &dev_attr_hotkey_recommended_mask.attr, 2930 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2931 &dev_attr_hotkey_source_mask.attr, 2932 &dev_attr_hotkey_poll_freq.attr, 2933 #endif 2934 }; 2935 2936 /* 2937 * Sync both the hw and sw blocking state of all switches 2938 */ 2939 static void tpacpi_send_radiosw_update(void) 2940 { 2941 int wlsw; 2942 2943 /* 2944 * We must sync all rfkill controllers *before* issuing any 2945 * rfkill input events, or we will race the rfkill core input 2946 * handler. 2947 * 2948 * tpacpi_inputdev_send_mutex works as a synchronization point 2949 * for the above. 2950 * 2951 * We optimize to avoid numerous calls to hotkey_get_wlsw. 2952 */ 2953 2954 wlsw = hotkey_get_wlsw(); 2955 2956 /* Sync hw blocking state first if it is hw-blocked */ 2957 if (wlsw == TPACPI_RFK_RADIO_OFF) 2958 tpacpi_rfk_update_hwblock_state(true); 2959 2960 /* Sync sw blocking state */ 2961 tpacpi_rfk_update_swstate_all(); 2962 2963 /* Sync hw blocking state last if it is hw-unblocked */ 2964 if (wlsw == TPACPI_RFK_RADIO_ON) 2965 tpacpi_rfk_update_hwblock_state(false); 2966 2967 /* Issue rfkill input event for WLSW switch */ 2968 if (!(wlsw < 0)) { 2969 mutex_lock(&tpacpi_inputdev_send_mutex); 2970 2971 input_report_switch(tpacpi_inputdev, 2972 SW_RFKILL_ALL, (wlsw > 0)); 2973 input_sync(tpacpi_inputdev); 2974 2975 mutex_unlock(&tpacpi_inputdev_send_mutex); 2976 } 2977 2978 /* 2979 * this can be unconditional, as we will poll state again 2980 * if userspace uses the notify to read data 2981 */ 2982 hotkey_radio_sw_notify_change(); 2983 } 2984 2985 static void hotkey_exit(void) 2986 { 2987 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2988 mutex_lock(&hotkey_mutex); 2989 hotkey_poll_stop_sync(); 2990 mutex_unlock(&hotkey_mutex); 2991 #endif 2992 2993 if (hotkey_dev_attributes) 2994 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 2995 2996 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 2997 "restoring original HKEY status and mask\n"); 2998 /* yes, there is a bitwise or below, we want the 2999 * functions to be called even if one of them fail */ 3000 if (((tp_features.hotkey_mask && 3001 hotkey_mask_set(hotkey_orig_mask)) | 3002 hotkey_status_set(false)) != 0) 3003 pr_err("failed to restore hot key mask " 3004 "to BIOS defaults\n"); 3005 } 3006 3007 static void __init hotkey_unmap(const unsigned int scancode) 3008 { 3009 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3010 clear_bit(hotkey_keycode_map[scancode], 3011 tpacpi_inputdev->keybit); 3012 hotkey_keycode_map[scancode] = KEY_RESERVED; 3013 } 3014 } 3015 3016 /* 3017 * HKEY quirks: 3018 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3019 */ 3020 3021 #define TPACPI_HK_Q_INIMASK 0x0001 3022 3023 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3024 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3025 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3026 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3027 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3028 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3029 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3030 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3031 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3032 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3033 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3034 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3035 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3036 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3037 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3038 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3039 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3040 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3041 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3042 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3043 }; 3044 3045 typedef u16 tpacpi_keymap_entry_t; 3046 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3047 3048 static int __init hotkey_init(struct ibm_init_struct *iibm) 3049 { 3050 /* Requirements for changing the default keymaps: 3051 * 3052 * 1. Many of the keys are mapped to KEY_RESERVED for very 3053 * good reasons. Do not change them unless you have deep 3054 * knowledge on the IBM and Lenovo ThinkPad firmware for 3055 * the various ThinkPad models. The driver behaves 3056 * differently for KEY_RESERVED: such keys have their 3057 * hot key mask *unset* in mask_recommended, and also 3058 * in the initial hot key mask programmed into the 3059 * firmware at driver load time, which means the firm- 3060 * ware may react very differently if you change them to 3061 * something else; 3062 * 3063 * 2. You must be subscribed to the linux-thinkpad and 3064 * ibm-acpi-devel mailing lists, and you should read the 3065 * list archives since 2007 if you want to change the 3066 * keymaps. This requirement exists so that you will 3067 * know the past history of problems with the thinkpad- 3068 * acpi driver keymaps, and also that you will be 3069 * listening to any bug reports; 3070 * 3071 * 3. Do not send thinkpad-acpi specific patches directly to 3072 * for merging, *ever*. Send them to the linux-acpi 3073 * mailinglist for comments. Merging is to be done only 3074 * through acpi-test and the ACPI maintainer. 3075 * 3076 * If the above is too much to ask, don't change the keymap. 3077 * Ask the thinkpad-acpi maintainer to do it, instead. 3078 */ 3079 3080 enum keymap_index { 3081 TPACPI_KEYMAP_IBM_GENERIC = 0, 3082 TPACPI_KEYMAP_LENOVO_GENERIC, 3083 }; 3084 3085 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3086 /* Generic keymap for IBM ThinkPads */ 3087 [TPACPI_KEYMAP_IBM_GENERIC] = { 3088 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3089 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3090 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3091 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3092 3093 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3094 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3095 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3096 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3097 3098 /* brightness: firmware always reacts to them */ 3099 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3100 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3101 3102 /* Thinklight: firmware always react to it */ 3103 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3104 3105 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3106 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3107 3108 /* Volume: firmware always react to it and reprograms 3109 * the built-in *extra* mixer. Never map it to control 3110 * another mixer by default. */ 3111 KEY_RESERVED, /* 0x14: VOLUME UP */ 3112 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3113 KEY_RESERVED, /* 0x16: MUTE */ 3114 3115 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3116 3117 /* (assignments unknown, please report if found) */ 3118 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3119 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3120 }, 3121 3122 /* Generic keymap for Lenovo ThinkPads */ 3123 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3124 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3125 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3126 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3127 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3128 3129 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3130 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3131 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3132 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3133 3134 /* These should be enabled --only-- when ACPI video 3135 * is disabled (i.e. in "vendor" mode), and are handled 3136 * in a special way by the init code */ 3137 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3138 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3139 3140 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3141 3142 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3143 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3144 3145 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3146 * react to it and reprograms the built-in *extra* mixer. 3147 * Never map it to control another mixer by default. 3148 * 3149 * T60?, T61, R60?, R61: firmware and EC tries to send 3150 * these over the regular keyboard, so these are no-ops, 3151 * but there are still weird bugs re. MUTE, so do not 3152 * change unless you get test reports from all Lenovo 3153 * models. May cause the BIOS to interfere with the 3154 * HDA mixer. 3155 */ 3156 KEY_RESERVED, /* 0x14: VOLUME UP */ 3157 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3158 KEY_RESERVED, /* 0x16: MUTE */ 3159 3160 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3161 3162 /* (assignments unknown, please report if found) */ 3163 KEY_UNKNOWN, KEY_UNKNOWN, 3164 3165 /* 3166 * The mic mute button only sends 0x1a. It does not 3167 * automatically mute the mic or change the mute light. 3168 */ 3169 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3170 3171 /* (assignments unknown, please report if found) */ 3172 KEY_UNKNOWN, 3173 3174 /* Extra keys in use since the X240 / T440 / T540 */ 3175 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3176 }, 3177 }; 3178 3179 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3180 /* Generic maps (fallback) */ 3181 { 3182 .vendor = PCI_VENDOR_ID_IBM, 3183 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3184 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3185 }, 3186 { 3187 .vendor = PCI_VENDOR_ID_LENOVO, 3188 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3189 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3190 }, 3191 }; 3192 3193 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3194 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3195 3196 int res, i; 3197 int status; 3198 int hkeyv; 3199 bool radiosw_state = false; 3200 bool tabletsw_state = false; 3201 3202 unsigned long quirks; 3203 unsigned long keymap_id; 3204 3205 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3206 "initializing hotkey subdriver\n"); 3207 3208 BUG_ON(!tpacpi_inputdev); 3209 BUG_ON(tpacpi_inputdev->open != NULL || 3210 tpacpi_inputdev->close != NULL); 3211 3212 TPACPI_ACPIHANDLE_INIT(hkey); 3213 mutex_init(&hotkey_mutex); 3214 3215 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3216 mutex_init(&hotkey_thread_data_mutex); 3217 #endif 3218 3219 /* hotkey not supported on 570 */ 3220 tp_features.hotkey = hkey_handle != NULL; 3221 3222 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3223 "hotkeys are %s\n", 3224 str_supported(tp_features.hotkey)); 3225 3226 if (!tp_features.hotkey) 3227 return 1; 3228 3229 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3230 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3231 3232 tpacpi_disable_brightness_delay(); 3233 3234 /* MUST have enough space for all attributes to be added to 3235 * hotkey_dev_attributes */ 3236 hotkey_dev_attributes = create_attr_set( 3237 ARRAY_SIZE(hotkey_attributes) + 2, 3238 NULL); 3239 if (!hotkey_dev_attributes) 3240 return -ENOMEM; 3241 res = add_many_to_attr_set(hotkey_dev_attributes, 3242 hotkey_attributes, 3243 ARRAY_SIZE(hotkey_attributes)); 3244 if (res) 3245 goto err_exit; 3246 3247 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3248 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3249 for HKEY interface version 0x100 */ 3250 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3251 if ((hkeyv >> 8) != 1) { 3252 pr_err("unknown version of the HKEY interface: 0x%x\n", 3253 hkeyv); 3254 pr_err("please report this to %s\n", TPACPI_MAIL); 3255 } else { 3256 /* 3257 * MHKV 0x100 in A31, R40, R40e, 3258 * T4x, X31, and later 3259 */ 3260 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3261 "firmware HKEY interface version: 0x%x\n", 3262 hkeyv); 3263 3264 /* Paranoia check AND init hotkey_all_mask */ 3265 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3266 "MHKA", "qd")) { 3267 pr_err("missing MHKA handler, " 3268 "please report this to %s\n", 3269 TPACPI_MAIL); 3270 /* Fallback: pre-init for FN+F3,F4,F12 */ 3271 hotkey_all_mask = 0x080cU; 3272 } else { 3273 tp_features.hotkey_mask = 1; 3274 } 3275 } 3276 } 3277 3278 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3279 "hotkey masks are %s\n", 3280 str_supported(tp_features.hotkey_mask)); 3281 3282 /* Init hotkey_all_mask if not initialized yet */ 3283 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3284 (quirks & TPACPI_HK_Q_INIMASK)) 3285 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3286 3287 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3288 if (tp_features.hotkey_mask) { 3289 /* hotkey_source_mask *must* be zero for 3290 * the first hotkey_mask_get to return hotkey_orig_mask */ 3291 res = hotkey_mask_get(); 3292 if (res) 3293 goto err_exit; 3294 3295 hotkey_orig_mask = hotkey_acpi_mask; 3296 } else { 3297 hotkey_orig_mask = hotkey_all_mask; 3298 hotkey_acpi_mask = hotkey_all_mask; 3299 } 3300 3301 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3302 if (dbg_wlswemul) { 3303 tp_features.hotkey_wlsw = 1; 3304 radiosw_state = !!tpacpi_wlsw_emulstate; 3305 pr_info("radio switch emulation enabled\n"); 3306 } else 3307 #endif 3308 /* Not all thinkpads have a hardware radio switch */ 3309 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3310 tp_features.hotkey_wlsw = 1; 3311 radiosw_state = !!status; 3312 pr_info("radio switch found; radios are %s\n", 3313 enabled(status, 0)); 3314 } 3315 if (tp_features.hotkey_wlsw) 3316 res = add_to_attr_set(hotkey_dev_attributes, 3317 &dev_attr_hotkey_radio_sw.attr); 3318 3319 /* For X41t, X60t, X61t Tablets... */ 3320 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3321 tp_features.hotkey_tablet = 1; 3322 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); 3323 pr_info("possible tablet mode switch found; " 3324 "ThinkPad in %s mode\n", 3325 (tabletsw_state) ? "tablet" : "laptop"); 3326 res = add_to_attr_set(hotkey_dev_attributes, 3327 &dev_attr_hotkey_tablet_mode.attr); 3328 } 3329 3330 if (!res) 3331 res = register_attr_set_with_sysfs( 3332 hotkey_dev_attributes, 3333 &tpacpi_pdev->dev.kobj); 3334 if (res) 3335 goto err_exit; 3336 3337 /* Set up key map */ 3338 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3339 GFP_KERNEL); 3340 if (!hotkey_keycode_map) { 3341 pr_err("failed to allocate memory for key map\n"); 3342 res = -ENOMEM; 3343 goto err_exit; 3344 } 3345 3346 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3347 ARRAY_SIZE(tpacpi_keymap_qtable)); 3348 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3349 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3350 "using keymap number %lu\n", keymap_id); 3351 3352 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3353 TPACPI_HOTKEY_MAP_SIZE); 3354 3355 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3356 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3357 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3358 tpacpi_inputdev->keycode = hotkey_keycode_map; 3359 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3360 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3361 input_set_capability(tpacpi_inputdev, EV_KEY, 3362 hotkey_keycode_map[i]); 3363 } else { 3364 if (i < sizeof(hotkey_reserved_mask)*8) 3365 hotkey_reserved_mask |= 1 << i; 3366 } 3367 } 3368 3369 if (tp_features.hotkey_wlsw) { 3370 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3371 input_report_switch(tpacpi_inputdev, 3372 SW_RFKILL_ALL, radiosw_state); 3373 } 3374 if (tp_features.hotkey_tablet) { 3375 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3376 input_report_switch(tpacpi_inputdev, 3377 SW_TABLET_MODE, tabletsw_state); 3378 } 3379 3380 /* Do not issue duplicate brightness change events to 3381 * userspace. tpacpi_detect_brightness_capabilities() must have 3382 * been called before this point */ 3383 if (acpi_video_backlight_support()) { 3384 pr_info("This ThinkPad has standard ACPI backlight " 3385 "brightness control, supported by the ACPI " 3386 "video driver\n"); 3387 pr_notice("Disabling thinkpad-acpi brightness events " 3388 "by default...\n"); 3389 3390 /* Disable brightness up/down on Lenovo thinkpads when 3391 * ACPI is handling them, otherwise it is plain impossible 3392 * for userspace to do something even remotely sane */ 3393 hotkey_reserved_mask |= 3394 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3395 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3396 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3397 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3398 } 3399 3400 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3401 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3402 & ~hotkey_all_mask 3403 & ~hotkey_reserved_mask; 3404 3405 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3406 "hotkey source mask 0x%08x, polling freq %u\n", 3407 hotkey_source_mask, hotkey_poll_freq); 3408 #endif 3409 3410 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3411 "enabling firmware HKEY event interface...\n"); 3412 res = hotkey_status_set(true); 3413 if (res) { 3414 hotkey_exit(); 3415 return res; 3416 } 3417 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3418 | hotkey_driver_mask) 3419 & ~hotkey_source_mask); 3420 if (res < 0 && res != -ENXIO) { 3421 hotkey_exit(); 3422 return res; 3423 } 3424 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3425 & ~hotkey_reserved_mask; 3426 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3427 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3428 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3429 3430 tpacpi_inputdev->open = &hotkey_inputdev_open; 3431 tpacpi_inputdev->close = &hotkey_inputdev_close; 3432 3433 hotkey_poll_setup_safe(true); 3434 3435 return 0; 3436 3437 err_exit: 3438 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3439 hotkey_dev_attributes = NULL; 3440 3441 return (res < 0) ? res : 1; 3442 } 3443 3444 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3445 * mode, Web conference mode, Function mode and Lay-flat mode. 3446 * We support Home mode and Function mode currently. 3447 * 3448 * Will consider support rest of modes in future. 3449 * 3450 */ 3451 enum ADAPTIVE_KEY_MODE { 3452 HOME_MODE, 3453 WEB_BROWSER_MODE, 3454 WEB_CONFERENCE_MODE, 3455 FUNCTION_MODE, 3456 LAYFLAT_MODE 3457 }; 3458 3459 const int adaptive_keyboard_modes[] = { 3460 HOME_MODE, 3461 /* WEB_BROWSER_MODE = 2, 3462 WEB_CONFERENCE_MODE = 3, */ 3463 FUNCTION_MODE 3464 }; 3465 3466 #define DFR_CHANGE_ROW 0x101 3467 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3468 3469 /* press Fn key a while second, it will switch to Function Mode. Then 3470 * release Fn key, previous mode be restored. 3471 */ 3472 static bool adaptive_keyboard_mode_is_saved; 3473 static int adaptive_keyboard_prev_mode; 3474 3475 static int adaptive_keyboard_get_next_mode(int mode) 3476 { 3477 size_t i; 3478 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3479 3480 for (i = 0; i <= max_mode; i++) { 3481 if (adaptive_keyboard_modes[i] == mode) 3482 break; 3483 } 3484 3485 if (i >= max_mode) 3486 i = 0; 3487 else 3488 i++; 3489 3490 return adaptive_keyboard_modes[i]; 3491 } 3492 3493 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3494 { 3495 u32 current_mode = 0; 3496 int new_mode = 0; 3497 3498 switch (scancode) { 3499 case DFR_CHANGE_ROW: 3500 if (adaptive_keyboard_mode_is_saved) { 3501 new_mode = adaptive_keyboard_prev_mode; 3502 adaptive_keyboard_mode_is_saved = false; 3503 } else { 3504 if (!acpi_evalf( 3505 hkey_handle, ¤t_mode, 3506 "GTRW", "dd", 0)) { 3507 pr_err("Cannot read adaptive keyboard mode\n"); 3508 return false; 3509 } else { 3510 new_mode = adaptive_keyboard_get_next_mode( 3511 current_mode); 3512 } 3513 } 3514 3515 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3516 pr_err("Cannot set adaptive keyboard mode\n"); 3517 return false; 3518 } 3519 3520 return true; 3521 3522 case DFR_SHOW_QUICKVIEW_ROW: 3523 if (!acpi_evalf(hkey_handle, 3524 &adaptive_keyboard_prev_mode, 3525 "GTRW", "dd", 0)) { 3526 pr_err("Cannot read adaptive keyboard mode\n"); 3527 return false; 3528 } else { 3529 adaptive_keyboard_mode_is_saved = true; 3530 3531 if (!acpi_evalf(hkey_handle, 3532 NULL, "STRW", "vd", FUNCTION_MODE)) { 3533 pr_err("Cannot set adaptive keyboard mode\n"); 3534 return false; 3535 } 3536 } 3537 return true; 3538 3539 default: 3540 return false; 3541 } 3542 } 3543 3544 static bool hotkey_notify_hotkey(const u32 hkey, 3545 bool *send_acpi_ev, 3546 bool *ignore_acpi_ev) 3547 { 3548 /* 0x1000-0x1FFF: key presses */ 3549 unsigned int scancode = hkey & 0xfff; 3550 *send_acpi_ev = true; 3551 *ignore_acpi_ev = false; 3552 3553 /* HKEY event 0x1001 is scancode 0x00 */ 3554 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3555 scancode--; 3556 if (!(hotkey_source_mask & (1 << scancode))) { 3557 tpacpi_input_send_key_masked(scancode); 3558 *send_acpi_ev = false; 3559 } else { 3560 *ignore_acpi_ev = true; 3561 } 3562 return true; 3563 } else { 3564 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3565 } 3566 return false; 3567 } 3568 3569 static bool hotkey_notify_wakeup(const u32 hkey, 3570 bool *send_acpi_ev, 3571 bool *ignore_acpi_ev) 3572 { 3573 /* 0x2000-0x2FFF: Wakeup reason */ 3574 *send_acpi_ev = true; 3575 *ignore_acpi_ev = false; 3576 3577 switch (hkey) { 3578 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3579 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3580 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3581 *ignore_acpi_ev = true; 3582 break; 3583 3584 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3585 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3586 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3587 *ignore_acpi_ev = true; 3588 break; 3589 3590 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3591 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3592 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3593 /* how to auto-heal: */ 3594 /* 2313: woke up from S3, go to S4/S5 */ 3595 /* 2413: woke up from S4, go to S5 */ 3596 break; 3597 3598 default: 3599 return false; 3600 } 3601 3602 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3603 pr_info("woke up due to a hot-unplug request...\n"); 3604 hotkey_wakeup_reason_notify_change(); 3605 } 3606 return true; 3607 } 3608 3609 static bool hotkey_notify_dockevent(const u32 hkey, 3610 bool *send_acpi_ev, 3611 bool *ignore_acpi_ev) 3612 { 3613 /* 0x4000-0x4FFF: dock-related events */ 3614 *send_acpi_ev = true; 3615 *ignore_acpi_ev = false; 3616 3617 switch (hkey) { 3618 case TP_HKEY_EV_UNDOCK_ACK: 3619 /* ACPI undock operation completed after wakeup */ 3620 hotkey_autosleep_ack = 1; 3621 pr_info("undocked\n"); 3622 hotkey_wakeup_hotunplug_complete_notify_change(); 3623 return true; 3624 3625 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3626 pr_info("docked into hotplug port replicator\n"); 3627 return true; 3628 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3629 pr_info("undocked from hotplug port replicator\n"); 3630 return true; 3631 3632 default: 3633 return false; 3634 } 3635 } 3636 3637 static bool hotkey_notify_usrevent(const u32 hkey, 3638 bool *send_acpi_ev, 3639 bool *ignore_acpi_ev) 3640 { 3641 /* 0x5000-0x5FFF: human interface helpers */ 3642 *send_acpi_ev = true; 3643 *ignore_acpi_ev = false; 3644 3645 switch (hkey) { 3646 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3647 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3648 return true; 3649 3650 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3651 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3652 tpacpi_input_send_tabletsw(); 3653 hotkey_tablet_mode_notify_change(); 3654 *send_acpi_ev = false; 3655 return true; 3656 3657 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3658 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3659 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3660 /* do not propagate these events */ 3661 *ignore_acpi_ev = true; 3662 return true; 3663 3664 default: 3665 return false; 3666 } 3667 } 3668 3669 static void thermal_dump_all_sensors(void); 3670 3671 static bool hotkey_notify_6xxx(const u32 hkey, 3672 bool *send_acpi_ev, 3673 bool *ignore_acpi_ev) 3674 { 3675 bool known = true; 3676 3677 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 3678 *send_acpi_ev = true; 3679 *ignore_acpi_ev = false; 3680 3681 switch (hkey) { 3682 case TP_HKEY_EV_THM_TABLE_CHANGED: 3683 pr_info("EC reports that Thermal Table has changed\n"); 3684 /* recommended action: do nothing, we don't have 3685 * Lenovo ATM information */ 3686 return true; 3687 case TP_HKEY_EV_ALARM_BAT_HOT: 3688 pr_crit("THERMAL ALARM: battery is too hot!\n"); 3689 /* recommended action: warn user through gui */ 3690 break; 3691 case TP_HKEY_EV_ALARM_BAT_XHOT: 3692 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 3693 /* recommended action: immediate sleep/hibernate */ 3694 break; 3695 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3696 pr_crit("THERMAL ALARM: " 3697 "a sensor reports something is too hot!\n"); 3698 /* recommended action: warn user through gui, that */ 3699 /* some internal component is too hot */ 3700 break; 3701 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3702 pr_alert("THERMAL EMERGENCY: " 3703 "a sensor reports something is extremely hot!\n"); 3704 /* recommended action: immediate sleep/hibernate */ 3705 break; 3706 case TP_HKEY_EV_AC_CHANGED: 3707 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 3708 * AC status changed; can be triggered by plugging or 3709 * unplugging AC adapter, docking or undocking. */ 3710 3711 /* fallthrough */ 3712 3713 case TP_HKEY_EV_KEY_NUMLOCK: 3714 case TP_HKEY_EV_KEY_FN: 3715 /* key press events, we just ignore them as long as the EC 3716 * is still reporting them in the normal keyboard stream */ 3717 *send_acpi_ev = false; 3718 *ignore_acpi_ev = true; 3719 return true; 3720 3721 default: 3722 pr_warn("unknown possible thermal alarm or keyboard event received\n"); 3723 known = false; 3724 } 3725 3726 thermal_dump_all_sensors(); 3727 3728 return known; 3729 } 3730 3731 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3732 { 3733 u32 hkey; 3734 bool send_acpi_ev; 3735 bool ignore_acpi_ev; 3736 bool known_ev; 3737 3738 if (event != 0x80) { 3739 pr_err("unknown HKEY notification event %d\n", event); 3740 /* forward it to userspace, maybe it knows how to handle it */ 3741 acpi_bus_generate_netlink_event( 3742 ibm->acpi->device->pnp.device_class, 3743 dev_name(&ibm->acpi->device->dev), 3744 event, 0); 3745 return; 3746 } 3747 3748 while (1) { 3749 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3750 pr_err("failed to retrieve HKEY event\n"); 3751 return; 3752 } 3753 3754 if (hkey == 0) { 3755 /* queue empty */ 3756 return; 3757 } 3758 3759 send_acpi_ev = true; 3760 ignore_acpi_ev = false; 3761 3762 switch (hkey >> 12) { 3763 case 1: 3764 /* 0x1000-0x1FFF: key presses */ 3765 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3766 &ignore_acpi_ev); 3767 break; 3768 case 2: 3769 /* 0x2000-0x2FFF: Wakeup reason */ 3770 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3771 &ignore_acpi_ev); 3772 break; 3773 case 3: 3774 /* 0x3000-0x3FFF: bay-related wakeups */ 3775 switch (hkey) { 3776 case TP_HKEY_EV_BAYEJ_ACK: 3777 hotkey_autosleep_ack = 1; 3778 pr_info("bay ejected\n"); 3779 hotkey_wakeup_hotunplug_complete_notify_change(); 3780 known_ev = true; 3781 break; 3782 case TP_HKEY_EV_OPTDRV_EJ: 3783 /* FIXME: kick libata if SATA link offline */ 3784 known_ev = true; 3785 break; 3786 default: 3787 known_ev = false; 3788 } 3789 break; 3790 case 4: 3791 /* 0x4000-0x4FFF: dock-related events */ 3792 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 3793 &ignore_acpi_ev); 3794 break; 3795 case 5: 3796 /* 0x5000-0x5FFF: human interface helpers */ 3797 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3798 &ignore_acpi_ev); 3799 break; 3800 case 6: 3801 /* 0x6000-0x6FFF: thermal alarms/notices and 3802 * keyboard events */ 3803 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 3804 &ignore_acpi_ev); 3805 break; 3806 case 7: 3807 /* 0x7000-0x7FFF: misc */ 3808 if (tp_features.hotkey_wlsw && 3809 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3810 tpacpi_send_radiosw_update(); 3811 send_acpi_ev = 0; 3812 known_ev = true; 3813 break; 3814 } 3815 /* fallthrough to default */ 3816 default: 3817 known_ev = false; 3818 } 3819 if (!known_ev) { 3820 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 3821 pr_notice("please report the conditions when this " 3822 "event happened to %s\n", TPACPI_MAIL); 3823 } 3824 3825 /* netlink events */ 3826 if (!ignore_acpi_ev && send_acpi_ev) { 3827 acpi_bus_generate_netlink_event( 3828 ibm->acpi->device->pnp.device_class, 3829 dev_name(&ibm->acpi->device->dev), 3830 event, hkey); 3831 } 3832 } 3833 } 3834 3835 static void hotkey_suspend(void) 3836 { 3837 int hkeyv; 3838 3839 /* Do these on suspend, we get the events on early resume! */ 3840 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 3841 hotkey_autosleep_ack = 0; 3842 3843 /* save previous mode of adaptive keyboard of X1 Carbon */ 3844 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3845 if ((hkeyv >> 8) == 2) { 3846 if (!acpi_evalf(hkey_handle, 3847 &adaptive_keyboard_prev_mode, 3848 "GTRW", "dd", 0)) { 3849 pr_err("Cannot read adaptive keyboard mode.\n"); 3850 } 3851 } 3852 } 3853 } 3854 3855 static void hotkey_resume(void) 3856 { 3857 int hkeyv; 3858 3859 tpacpi_disable_brightness_delay(); 3860 3861 if (hotkey_status_set(true) < 0 || 3862 hotkey_mask_set(hotkey_acpi_mask) < 0) 3863 pr_err("error while attempting to reset the event " 3864 "firmware interface\n"); 3865 3866 tpacpi_send_radiosw_update(); 3867 hotkey_tablet_mode_notify_change(); 3868 hotkey_wakeup_reason_notify_change(); 3869 hotkey_wakeup_hotunplug_complete_notify_change(); 3870 hotkey_poll_setup_safe(false); 3871 3872 /* restore previous mode of adapive keyboard of X1 Carbon */ 3873 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3874 if ((hkeyv >> 8) == 2) { 3875 if (!acpi_evalf(hkey_handle, 3876 NULL, 3877 "STRW", "vd", 3878 adaptive_keyboard_prev_mode)) { 3879 pr_err("Cannot set adaptive keyboard mode.\n"); 3880 } 3881 } 3882 } 3883 } 3884 3885 /* procfs -------------------------------------------------------------- */ 3886 static int hotkey_read(struct seq_file *m) 3887 { 3888 int res, status; 3889 3890 if (!tp_features.hotkey) { 3891 seq_printf(m, "status:\t\tnot supported\n"); 3892 return 0; 3893 } 3894 3895 if (mutex_lock_killable(&hotkey_mutex)) 3896 return -ERESTARTSYS; 3897 res = hotkey_status_get(&status); 3898 if (!res) 3899 res = hotkey_mask_get(); 3900 mutex_unlock(&hotkey_mutex); 3901 if (res) 3902 return res; 3903 3904 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 3905 if (hotkey_all_mask) { 3906 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 3907 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 3908 } else { 3909 seq_printf(m, "mask:\t\tnot supported\n"); 3910 seq_printf(m, "commands:\tenable, disable, reset\n"); 3911 } 3912 3913 return 0; 3914 } 3915 3916 static void hotkey_enabledisable_warn(bool enable) 3917 { 3918 tpacpi_log_usertask("procfs hotkey enable/disable"); 3919 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 3920 pr_fmt("hotkey enable/disable functionality has been " 3921 "removed from the driver. " 3922 "Hotkeys are always enabled.\n"))) 3923 pr_err("Please remove the hotkey=enable module " 3924 "parameter, it is deprecated. " 3925 "Hotkeys are always enabled.\n"); 3926 } 3927 3928 static int hotkey_write(char *buf) 3929 { 3930 int res; 3931 u32 mask; 3932 char *cmd; 3933 3934 if (!tp_features.hotkey) 3935 return -ENODEV; 3936 3937 if (mutex_lock_killable(&hotkey_mutex)) 3938 return -ERESTARTSYS; 3939 3940 mask = hotkey_user_mask; 3941 3942 res = 0; 3943 while ((cmd = next_cmd(&buf))) { 3944 if (strlencmp(cmd, "enable") == 0) { 3945 hotkey_enabledisable_warn(1); 3946 } else if (strlencmp(cmd, "disable") == 0) { 3947 hotkey_enabledisable_warn(0); 3948 res = -EPERM; 3949 } else if (strlencmp(cmd, "reset") == 0) { 3950 mask = (hotkey_all_mask | hotkey_source_mask) 3951 & ~hotkey_reserved_mask; 3952 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 3953 /* mask set */ 3954 } else if (sscanf(cmd, "%x", &mask) == 1) { 3955 /* mask set */ 3956 } else { 3957 res = -EINVAL; 3958 goto errexit; 3959 } 3960 } 3961 3962 if (!res) { 3963 tpacpi_disclose_usertask("procfs hotkey", 3964 "set mask to 0x%08x\n", mask); 3965 res = hotkey_user_mask_set(mask); 3966 } 3967 3968 errexit: 3969 mutex_unlock(&hotkey_mutex); 3970 return res; 3971 } 3972 3973 static const struct acpi_device_id ibm_htk_device_ids[] = { 3974 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 3975 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 3976 {"", 0}, 3977 }; 3978 3979 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 3980 .hid = ibm_htk_device_ids, 3981 .notify = hotkey_notify, 3982 .handle = &hkey_handle, 3983 .type = ACPI_DEVICE_NOTIFY, 3984 }; 3985 3986 static struct ibm_struct hotkey_driver_data = { 3987 .name = "hotkey", 3988 .read = hotkey_read, 3989 .write = hotkey_write, 3990 .exit = hotkey_exit, 3991 .resume = hotkey_resume, 3992 .suspend = hotkey_suspend, 3993 .acpi = &ibm_hotkey_acpidriver, 3994 }; 3995 3996 /************************************************************************* 3997 * Bluetooth subdriver 3998 */ 3999 4000 enum { 4001 /* ACPI GBDC/SBDC bits */ 4002 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4003 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4004 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4005 0 = disable, 1 = enable */ 4006 }; 4007 4008 enum { 4009 /* ACPI \BLTH commands */ 4010 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4011 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4012 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4013 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4014 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4015 }; 4016 4017 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4018 4019 static int bluetooth_get_status(void) 4020 { 4021 int status; 4022 4023 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4024 if (dbg_bluetoothemul) 4025 return (tpacpi_bluetooth_emulstate) ? 4026 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4027 #endif 4028 4029 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4030 return -EIO; 4031 4032 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4033 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4034 } 4035 4036 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4037 { 4038 int status; 4039 4040 vdbg_printk(TPACPI_DBG_RFKILL, 4041 "will attempt to %s bluetooth\n", 4042 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4043 4044 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4045 if (dbg_bluetoothemul) { 4046 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4047 return 0; 4048 } 4049 #endif 4050 4051 if (state == TPACPI_RFK_RADIO_ON) 4052 status = TP_ACPI_BLUETOOTH_RADIOSSW 4053 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4054 else 4055 status = 0; 4056 4057 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4058 return -EIO; 4059 4060 return 0; 4061 } 4062 4063 /* sysfs bluetooth enable ---------------------------------------------- */ 4064 static ssize_t bluetooth_enable_show(struct device *dev, 4065 struct device_attribute *attr, 4066 char *buf) 4067 { 4068 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4069 attr, buf); 4070 } 4071 4072 static ssize_t bluetooth_enable_store(struct device *dev, 4073 struct device_attribute *attr, 4074 const char *buf, size_t count) 4075 { 4076 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4077 attr, buf, count); 4078 } 4079 4080 static struct device_attribute dev_attr_bluetooth_enable = 4081 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO, 4082 bluetooth_enable_show, bluetooth_enable_store); 4083 4084 /* --------------------------------------------------------------------- */ 4085 4086 static struct attribute *bluetooth_attributes[] = { 4087 &dev_attr_bluetooth_enable.attr, 4088 NULL 4089 }; 4090 4091 static const struct attribute_group bluetooth_attr_group = { 4092 .attrs = bluetooth_attributes, 4093 }; 4094 4095 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4096 .get_status = bluetooth_get_status, 4097 .set_status = bluetooth_set_status, 4098 }; 4099 4100 static void bluetooth_shutdown(void) 4101 { 4102 /* Order firmware to save current state to NVRAM */ 4103 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4104 TP_ACPI_BLTH_SAVE_STATE)) 4105 pr_notice("failed to save bluetooth state to NVRAM\n"); 4106 else 4107 vdbg_printk(TPACPI_DBG_RFKILL, 4108 "bluetooth state saved to NVRAM\n"); 4109 } 4110 4111 static void bluetooth_exit(void) 4112 { 4113 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4114 &bluetooth_attr_group); 4115 4116 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4117 4118 bluetooth_shutdown(); 4119 } 4120 4121 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4122 { 4123 int res; 4124 int status = 0; 4125 4126 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4127 "initializing bluetooth subdriver\n"); 4128 4129 TPACPI_ACPIHANDLE_INIT(hkey); 4130 4131 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4132 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4133 tp_features.bluetooth = hkey_handle && 4134 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4135 4136 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4137 "bluetooth is %s, status 0x%02x\n", 4138 str_supported(tp_features.bluetooth), 4139 status); 4140 4141 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4142 if (dbg_bluetoothemul) { 4143 tp_features.bluetooth = 1; 4144 pr_info("bluetooth switch emulation enabled\n"); 4145 } else 4146 #endif 4147 if (tp_features.bluetooth && 4148 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4149 /* no bluetooth hardware present in system */ 4150 tp_features.bluetooth = 0; 4151 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4152 "bluetooth hardware not installed\n"); 4153 } 4154 4155 if (!tp_features.bluetooth) 4156 return 1; 4157 4158 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4159 &bluetooth_tprfk_ops, 4160 RFKILL_TYPE_BLUETOOTH, 4161 TPACPI_RFK_BLUETOOTH_SW_NAME, 4162 true); 4163 if (res) 4164 return res; 4165 4166 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4167 &bluetooth_attr_group); 4168 if (res) { 4169 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4170 return res; 4171 } 4172 4173 return 0; 4174 } 4175 4176 /* procfs -------------------------------------------------------------- */ 4177 static int bluetooth_read(struct seq_file *m) 4178 { 4179 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4180 } 4181 4182 static int bluetooth_write(char *buf) 4183 { 4184 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4185 } 4186 4187 static struct ibm_struct bluetooth_driver_data = { 4188 .name = "bluetooth", 4189 .read = bluetooth_read, 4190 .write = bluetooth_write, 4191 .exit = bluetooth_exit, 4192 .shutdown = bluetooth_shutdown, 4193 }; 4194 4195 /************************************************************************* 4196 * Wan subdriver 4197 */ 4198 4199 enum { 4200 /* ACPI GWAN/SWAN bits */ 4201 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4202 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4203 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4204 0 = disable, 1 = enable */ 4205 }; 4206 4207 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4208 4209 static int wan_get_status(void) 4210 { 4211 int status; 4212 4213 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4214 if (dbg_wwanemul) 4215 return (tpacpi_wwan_emulstate) ? 4216 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4217 #endif 4218 4219 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4220 return -EIO; 4221 4222 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4223 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4224 } 4225 4226 static int wan_set_status(enum tpacpi_rfkill_state state) 4227 { 4228 int status; 4229 4230 vdbg_printk(TPACPI_DBG_RFKILL, 4231 "will attempt to %s wwan\n", 4232 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4233 4234 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4235 if (dbg_wwanemul) { 4236 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4237 return 0; 4238 } 4239 #endif 4240 4241 if (state == TPACPI_RFK_RADIO_ON) 4242 status = TP_ACPI_WANCARD_RADIOSSW 4243 | TP_ACPI_WANCARD_RESUMECTRL; 4244 else 4245 status = 0; 4246 4247 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4248 return -EIO; 4249 4250 return 0; 4251 } 4252 4253 /* sysfs wan enable ---------------------------------------------------- */ 4254 static ssize_t wan_enable_show(struct device *dev, 4255 struct device_attribute *attr, 4256 char *buf) 4257 { 4258 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4259 attr, buf); 4260 } 4261 4262 static ssize_t wan_enable_store(struct device *dev, 4263 struct device_attribute *attr, 4264 const char *buf, size_t count) 4265 { 4266 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4267 attr, buf, count); 4268 } 4269 4270 static struct device_attribute dev_attr_wan_enable = 4271 __ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4272 wan_enable_show, wan_enable_store); 4273 4274 /* --------------------------------------------------------------------- */ 4275 4276 static struct attribute *wan_attributes[] = { 4277 &dev_attr_wan_enable.attr, 4278 NULL 4279 }; 4280 4281 static const struct attribute_group wan_attr_group = { 4282 .attrs = wan_attributes, 4283 }; 4284 4285 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4286 .get_status = wan_get_status, 4287 .set_status = wan_set_status, 4288 }; 4289 4290 static void wan_shutdown(void) 4291 { 4292 /* Order firmware to save current state to NVRAM */ 4293 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4294 TP_ACPI_WGSV_SAVE_STATE)) 4295 pr_notice("failed to save WWAN state to NVRAM\n"); 4296 else 4297 vdbg_printk(TPACPI_DBG_RFKILL, 4298 "WWAN state saved to NVRAM\n"); 4299 } 4300 4301 static void wan_exit(void) 4302 { 4303 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4304 &wan_attr_group); 4305 4306 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4307 4308 wan_shutdown(); 4309 } 4310 4311 static int __init wan_init(struct ibm_init_struct *iibm) 4312 { 4313 int res; 4314 int status = 0; 4315 4316 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4317 "initializing wan subdriver\n"); 4318 4319 TPACPI_ACPIHANDLE_INIT(hkey); 4320 4321 tp_features.wan = hkey_handle && 4322 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4323 4324 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4325 "wan is %s, status 0x%02x\n", 4326 str_supported(tp_features.wan), 4327 status); 4328 4329 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4330 if (dbg_wwanemul) { 4331 tp_features.wan = 1; 4332 pr_info("wwan switch emulation enabled\n"); 4333 } else 4334 #endif 4335 if (tp_features.wan && 4336 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4337 /* no wan hardware present in system */ 4338 tp_features.wan = 0; 4339 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4340 "wan hardware not installed\n"); 4341 } 4342 4343 if (!tp_features.wan) 4344 return 1; 4345 4346 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4347 &wan_tprfk_ops, 4348 RFKILL_TYPE_WWAN, 4349 TPACPI_RFK_WWAN_SW_NAME, 4350 true); 4351 if (res) 4352 return res; 4353 4354 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4355 &wan_attr_group); 4356 4357 if (res) { 4358 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4359 return res; 4360 } 4361 4362 return 0; 4363 } 4364 4365 /* procfs -------------------------------------------------------------- */ 4366 static int wan_read(struct seq_file *m) 4367 { 4368 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4369 } 4370 4371 static int wan_write(char *buf) 4372 { 4373 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4374 } 4375 4376 static struct ibm_struct wan_driver_data = { 4377 .name = "wan", 4378 .read = wan_read, 4379 .write = wan_write, 4380 .exit = wan_exit, 4381 .shutdown = wan_shutdown, 4382 }; 4383 4384 /************************************************************************* 4385 * UWB subdriver 4386 */ 4387 4388 enum { 4389 /* ACPI GUWB/SUWB bits */ 4390 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4391 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4392 }; 4393 4394 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4395 4396 static int uwb_get_status(void) 4397 { 4398 int status; 4399 4400 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4401 if (dbg_uwbemul) 4402 return (tpacpi_uwb_emulstate) ? 4403 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4404 #endif 4405 4406 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4407 return -EIO; 4408 4409 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4410 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4411 } 4412 4413 static int uwb_set_status(enum tpacpi_rfkill_state state) 4414 { 4415 int status; 4416 4417 vdbg_printk(TPACPI_DBG_RFKILL, 4418 "will attempt to %s UWB\n", 4419 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4420 4421 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4422 if (dbg_uwbemul) { 4423 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4424 return 0; 4425 } 4426 #endif 4427 4428 if (state == TPACPI_RFK_RADIO_ON) 4429 status = TP_ACPI_UWB_RADIOSSW; 4430 else 4431 status = 0; 4432 4433 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4434 return -EIO; 4435 4436 return 0; 4437 } 4438 4439 /* --------------------------------------------------------------------- */ 4440 4441 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4442 .get_status = uwb_get_status, 4443 .set_status = uwb_set_status, 4444 }; 4445 4446 static void uwb_exit(void) 4447 { 4448 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4449 } 4450 4451 static int __init uwb_init(struct ibm_init_struct *iibm) 4452 { 4453 int res; 4454 int status = 0; 4455 4456 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4457 "initializing uwb subdriver\n"); 4458 4459 TPACPI_ACPIHANDLE_INIT(hkey); 4460 4461 tp_features.uwb = hkey_handle && 4462 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4463 4464 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4465 "uwb is %s, status 0x%02x\n", 4466 str_supported(tp_features.uwb), 4467 status); 4468 4469 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4470 if (dbg_uwbemul) { 4471 tp_features.uwb = 1; 4472 pr_info("uwb switch emulation enabled\n"); 4473 } else 4474 #endif 4475 if (tp_features.uwb && 4476 !(status & TP_ACPI_UWB_HWPRESENT)) { 4477 /* no uwb hardware present in system */ 4478 tp_features.uwb = 0; 4479 dbg_printk(TPACPI_DBG_INIT, 4480 "uwb hardware not installed\n"); 4481 } 4482 4483 if (!tp_features.uwb) 4484 return 1; 4485 4486 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4487 &uwb_tprfk_ops, 4488 RFKILL_TYPE_UWB, 4489 TPACPI_RFK_UWB_SW_NAME, 4490 false); 4491 return res; 4492 } 4493 4494 static struct ibm_struct uwb_driver_data = { 4495 .name = "uwb", 4496 .exit = uwb_exit, 4497 .flags.experimental = 1, 4498 }; 4499 4500 /************************************************************************* 4501 * Video subdriver 4502 */ 4503 4504 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4505 4506 enum video_access_mode { 4507 TPACPI_VIDEO_NONE = 0, 4508 TPACPI_VIDEO_570, /* 570 */ 4509 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4510 TPACPI_VIDEO_NEW, /* all others */ 4511 }; 4512 4513 enum { /* video status flags, based on VIDEO_570 */ 4514 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4515 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4516 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4517 }; 4518 4519 enum { /* TPACPI_VIDEO_570 constants */ 4520 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4521 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4522 * video_status_flags */ 4523 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4524 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4525 }; 4526 4527 static enum video_access_mode video_supported; 4528 static int video_orig_autosw; 4529 4530 static int video_autosw_get(void); 4531 static int video_autosw_set(int enable); 4532 4533 TPACPI_HANDLE(vid, root, 4534 "\\_SB.PCI.AGP.VGA", /* 570 */ 4535 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4536 "\\_SB.PCI0.VID0", /* 770e */ 4537 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4538 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4539 "\\_SB.PCI0.AGP.VID", /* all others */ 4540 ); /* R30, R31 */ 4541 4542 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4543 4544 static int __init video_init(struct ibm_init_struct *iibm) 4545 { 4546 int ivga; 4547 4548 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4549 4550 TPACPI_ACPIHANDLE_INIT(vid); 4551 if (tpacpi_is_ibm()) 4552 TPACPI_ACPIHANDLE_INIT(vid2); 4553 4554 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4555 /* G41, assume IVGA doesn't change */ 4556 vid_handle = vid2_handle; 4557 4558 if (!vid_handle) 4559 /* video switching not supported on R30, R31 */ 4560 video_supported = TPACPI_VIDEO_NONE; 4561 else if (tpacpi_is_ibm() && 4562 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4563 /* 570 */ 4564 video_supported = TPACPI_VIDEO_570; 4565 else if (tpacpi_is_ibm() && 4566 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4567 /* 600e/x, 770e, 770x */ 4568 video_supported = TPACPI_VIDEO_770; 4569 else 4570 /* all others */ 4571 video_supported = TPACPI_VIDEO_NEW; 4572 4573 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4574 str_supported(video_supported != TPACPI_VIDEO_NONE), 4575 video_supported); 4576 4577 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 4578 } 4579 4580 static void video_exit(void) 4581 { 4582 dbg_printk(TPACPI_DBG_EXIT, 4583 "restoring original video autoswitch mode\n"); 4584 if (video_autosw_set(video_orig_autosw)) 4585 pr_err("error while trying to restore original " 4586 "video autoswitch mode\n"); 4587 } 4588 4589 static int video_outputsw_get(void) 4590 { 4591 int status = 0; 4592 int i; 4593 4594 switch (video_supported) { 4595 case TPACPI_VIDEO_570: 4596 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4597 TP_ACPI_VIDEO_570_PHSCMD)) 4598 return -EIO; 4599 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4600 break; 4601 case TPACPI_VIDEO_770: 4602 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4603 return -EIO; 4604 if (i) 4605 status |= TP_ACPI_VIDEO_S_LCD; 4606 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4607 return -EIO; 4608 if (i) 4609 status |= TP_ACPI_VIDEO_S_CRT; 4610 break; 4611 case TPACPI_VIDEO_NEW: 4612 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4613 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4614 return -EIO; 4615 if (i) 4616 status |= TP_ACPI_VIDEO_S_CRT; 4617 4618 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4619 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4620 return -EIO; 4621 if (i) 4622 status |= TP_ACPI_VIDEO_S_LCD; 4623 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4624 return -EIO; 4625 if (i) 4626 status |= TP_ACPI_VIDEO_S_DVI; 4627 break; 4628 default: 4629 return -ENOSYS; 4630 } 4631 4632 return status; 4633 } 4634 4635 static int video_outputsw_set(int status) 4636 { 4637 int autosw; 4638 int res = 0; 4639 4640 switch (video_supported) { 4641 case TPACPI_VIDEO_570: 4642 res = acpi_evalf(NULL, NULL, 4643 "\\_SB.PHS2", "vdd", 4644 TP_ACPI_VIDEO_570_PHS2CMD, 4645 status | TP_ACPI_VIDEO_570_PHS2SET); 4646 break; 4647 case TPACPI_VIDEO_770: 4648 autosw = video_autosw_get(); 4649 if (autosw < 0) 4650 return autosw; 4651 4652 res = video_autosw_set(1); 4653 if (res) 4654 return res; 4655 res = acpi_evalf(vid_handle, NULL, 4656 "ASWT", "vdd", status * 0x100, 0); 4657 if (!autosw && video_autosw_set(autosw)) { 4658 pr_err("video auto-switch left enabled due to error\n"); 4659 return -EIO; 4660 } 4661 break; 4662 case TPACPI_VIDEO_NEW: 4663 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4664 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4665 break; 4666 default: 4667 return -ENOSYS; 4668 } 4669 4670 return (res) ? 0 : -EIO; 4671 } 4672 4673 static int video_autosw_get(void) 4674 { 4675 int autosw = 0; 4676 4677 switch (video_supported) { 4678 case TPACPI_VIDEO_570: 4679 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4680 return -EIO; 4681 break; 4682 case TPACPI_VIDEO_770: 4683 case TPACPI_VIDEO_NEW: 4684 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4685 return -EIO; 4686 break; 4687 default: 4688 return -ENOSYS; 4689 } 4690 4691 return autosw & 1; 4692 } 4693 4694 static int video_autosw_set(int enable) 4695 { 4696 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 4697 return -EIO; 4698 return 0; 4699 } 4700 4701 static int video_outputsw_cycle(void) 4702 { 4703 int autosw = video_autosw_get(); 4704 int res; 4705 4706 if (autosw < 0) 4707 return autosw; 4708 4709 switch (video_supported) { 4710 case TPACPI_VIDEO_570: 4711 res = video_autosw_set(1); 4712 if (res) 4713 return res; 4714 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4715 break; 4716 case TPACPI_VIDEO_770: 4717 case TPACPI_VIDEO_NEW: 4718 res = video_autosw_set(1); 4719 if (res) 4720 return res; 4721 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4722 break; 4723 default: 4724 return -ENOSYS; 4725 } 4726 if (!autosw && video_autosw_set(autosw)) { 4727 pr_err("video auto-switch left enabled due to error\n"); 4728 return -EIO; 4729 } 4730 4731 return (res) ? 0 : -EIO; 4732 } 4733 4734 static int video_expand_toggle(void) 4735 { 4736 switch (video_supported) { 4737 case TPACPI_VIDEO_570: 4738 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 4739 0 : -EIO; 4740 case TPACPI_VIDEO_770: 4741 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 4742 0 : -EIO; 4743 case TPACPI_VIDEO_NEW: 4744 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 4745 0 : -EIO; 4746 default: 4747 return -ENOSYS; 4748 } 4749 /* not reached */ 4750 } 4751 4752 static int video_read(struct seq_file *m) 4753 { 4754 int status, autosw; 4755 4756 if (video_supported == TPACPI_VIDEO_NONE) { 4757 seq_printf(m, "status:\t\tnot supported\n"); 4758 return 0; 4759 } 4760 4761 /* Even reads can crash X.org, so... */ 4762 if (!capable(CAP_SYS_ADMIN)) 4763 return -EPERM; 4764 4765 status = video_outputsw_get(); 4766 if (status < 0) 4767 return status; 4768 4769 autosw = video_autosw_get(); 4770 if (autosw < 0) 4771 return autosw; 4772 4773 seq_printf(m, "status:\t\tsupported\n"); 4774 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4775 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4776 if (video_supported == TPACPI_VIDEO_NEW) 4777 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 4778 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 4779 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 4780 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 4781 if (video_supported == TPACPI_VIDEO_NEW) 4782 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 4783 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 4784 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 4785 4786 return 0; 4787 } 4788 4789 static int video_write(char *buf) 4790 { 4791 char *cmd; 4792 int enable, disable, status; 4793 int res; 4794 4795 if (video_supported == TPACPI_VIDEO_NONE) 4796 return -ENODEV; 4797 4798 /* Even reads can crash X.org, let alone writes... */ 4799 if (!capable(CAP_SYS_ADMIN)) 4800 return -EPERM; 4801 4802 enable = 0; 4803 disable = 0; 4804 4805 while ((cmd = next_cmd(&buf))) { 4806 if (strlencmp(cmd, "lcd_enable") == 0) { 4807 enable |= TP_ACPI_VIDEO_S_LCD; 4808 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4809 disable |= TP_ACPI_VIDEO_S_LCD; 4810 } else if (strlencmp(cmd, "crt_enable") == 0) { 4811 enable |= TP_ACPI_VIDEO_S_CRT; 4812 } else if (strlencmp(cmd, "crt_disable") == 0) { 4813 disable |= TP_ACPI_VIDEO_S_CRT; 4814 } else if (video_supported == TPACPI_VIDEO_NEW && 4815 strlencmp(cmd, "dvi_enable") == 0) { 4816 enable |= TP_ACPI_VIDEO_S_DVI; 4817 } else if (video_supported == TPACPI_VIDEO_NEW && 4818 strlencmp(cmd, "dvi_disable") == 0) { 4819 disable |= TP_ACPI_VIDEO_S_DVI; 4820 } else if (strlencmp(cmd, "auto_enable") == 0) { 4821 res = video_autosw_set(1); 4822 if (res) 4823 return res; 4824 } else if (strlencmp(cmd, "auto_disable") == 0) { 4825 res = video_autosw_set(0); 4826 if (res) 4827 return res; 4828 } else if (strlencmp(cmd, "video_switch") == 0) { 4829 res = video_outputsw_cycle(); 4830 if (res) 4831 return res; 4832 } else if (strlencmp(cmd, "expand_toggle") == 0) { 4833 res = video_expand_toggle(); 4834 if (res) 4835 return res; 4836 } else 4837 return -EINVAL; 4838 } 4839 4840 if (enable || disable) { 4841 status = video_outputsw_get(); 4842 if (status < 0) 4843 return status; 4844 res = video_outputsw_set((status & ~disable) | enable); 4845 if (res) 4846 return res; 4847 } 4848 4849 return 0; 4850 } 4851 4852 static struct ibm_struct video_driver_data = { 4853 .name = "video", 4854 .read = video_read, 4855 .write = video_write, 4856 .exit = video_exit, 4857 }; 4858 4859 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 4860 4861 /************************************************************************* 4862 * Light (thinklight) subdriver 4863 */ 4864 4865 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 4866 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 4867 4868 static int light_get_status(void) 4869 { 4870 int status = 0; 4871 4872 if (tp_features.light_status) { 4873 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 4874 return -EIO; 4875 return (!!status); 4876 } 4877 4878 return -ENXIO; 4879 } 4880 4881 static int light_set_status(int status) 4882 { 4883 int rc; 4884 4885 if (tp_features.light) { 4886 if (cmos_handle) { 4887 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 4888 (status) ? 4889 TP_CMOS_THINKLIGHT_ON : 4890 TP_CMOS_THINKLIGHT_OFF); 4891 } else { 4892 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 4893 (status) ? 1 : 0); 4894 } 4895 return (rc) ? 0 : -EIO; 4896 } 4897 4898 return -ENXIO; 4899 } 4900 4901 static void light_set_status_worker(struct work_struct *work) 4902 { 4903 struct tpacpi_led_classdev *data = 4904 container_of(work, struct tpacpi_led_classdev, work); 4905 4906 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 4907 light_set_status((data->new_state != TPACPI_LED_OFF)); 4908 } 4909 4910 static void light_sysfs_set(struct led_classdev *led_cdev, 4911 enum led_brightness brightness) 4912 { 4913 struct tpacpi_led_classdev *data = 4914 container_of(led_cdev, 4915 struct tpacpi_led_classdev, 4916 led_classdev); 4917 data->new_state = (brightness != LED_OFF) ? 4918 TPACPI_LED_ON : TPACPI_LED_OFF; 4919 queue_work(tpacpi_wq, &data->work); 4920 } 4921 4922 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 4923 { 4924 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 4925 } 4926 4927 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 4928 .led_classdev = { 4929 .name = "tpacpi::thinklight", 4930 .brightness_set = &light_sysfs_set, 4931 .brightness_get = &light_sysfs_get, 4932 } 4933 }; 4934 4935 static int __init light_init(struct ibm_init_struct *iibm) 4936 { 4937 int rc; 4938 4939 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 4940 4941 if (tpacpi_is_ibm()) { 4942 TPACPI_ACPIHANDLE_INIT(ledb); 4943 TPACPI_ACPIHANDLE_INIT(lght); 4944 } 4945 TPACPI_ACPIHANDLE_INIT(cmos); 4946 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 4947 4948 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 4949 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 4950 4951 if (tp_features.light) 4952 /* light status not supported on 4953 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 4954 tp_features.light_status = 4955 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 4956 4957 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 4958 str_supported(tp_features.light), 4959 str_supported(tp_features.light_status)); 4960 4961 if (!tp_features.light) 4962 return 1; 4963 4964 rc = led_classdev_register(&tpacpi_pdev->dev, 4965 &tpacpi_led_thinklight.led_classdev); 4966 4967 if (rc < 0) { 4968 tp_features.light = 0; 4969 tp_features.light_status = 0; 4970 } else { 4971 rc = 0; 4972 } 4973 4974 return rc; 4975 } 4976 4977 static void light_exit(void) 4978 { 4979 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 4980 flush_workqueue(tpacpi_wq); 4981 } 4982 4983 static int light_read(struct seq_file *m) 4984 { 4985 int status; 4986 4987 if (!tp_features.light) { 4988 seq_printf(m, "status:\t\tnot supported\n"); 4989 } else if (!tp_features.light_status) { 4990 seq_printf(m, "status:\t\tunknown\n"); 4991 seq_printf(m, "commands:\ton, off\n"); 4992 } else { 4993 status = light_get_status(); 4994 if (status < 0) 4995 return status; 4996 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 4997 seq_printf(m, "commands:\ton, off\n"); 4998 } 4999 5000 return 0; 5001 } 5002 5003 static int light_write(char *buf) 5004 { 5005 char *cmd; 5006 int newstatus = 0; 5007 5008 if (!tp_features.light) 5009 return -ENODEV; 5010 5011 while ((cmd = next_cmd(&buf))) { 5012 if (strlencmp(cmd, "on") == 0) { 5013 newstatus = 1; 5014 } else if (strlencmp(cmd, "off") == 0) { 5015 newstatus = 0; 5016 } else 5017 return -EINVAL; 5018 } 5019 5020 return light_set_status(newstatus); 5021 } 5022 5023 static struct ibm_struct light_driver_data = { 5024 .name = "light", 5025 .read = light_read, 5026 .write = light_write, 5027 .exit = light_exit, 5028 }; 5029 5030 /************************************************************************* 5031 * CMOS subdriver 5032 */ 5033 5034 /* sysfs cmos_command -------------------------------------------------- */ 5035 static ssize_t cmos_command_store(struct device *dev, 5036 struct device_attribute *attr, 5037 const char *buf, size_t count) 5038 { 5039 unsigned long cmos_cmd; 5040 int res; 5041 5042 if (parse_strtoul(buf, 21, &cmos_cmd)) 5043 return -EINVAL; 5044 5045 res = issue_thinkpad_cmos_command(cmos_cmd); 5046 return (res) ? res : count; 5047 } 5048 5049 static struct device_attribute dev_attr_cmos_command = 5050 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store); 5051 5052 /* --------------------------------------------------------------------- */ 5053 5054 static int __init cmos_init(struct ibm_init_struct *iibm) 5055 { 5056 int res; 5057 5058 vdbg_printk(TPACPI_DBG_INIT, 5059 "initializing cmos commands subdriver\n"); 5060 5061 TPACPI_ACPIHANDLE_INIT(cmos); 5062 5063 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5064 str_supported(cmos_handle != NULL)); 5065 5066 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5067 if (res) 5068 return res; 5069 5070 return (cmos_handle) ? 0 : 1; 5071 } 5072 5073 static void cmos_exit(void) 5074 { 5075 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5076 } 5077 5078 static int cmos_read(struct seq_file *m) 5079 { 5080 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5081 R30, R31, T20-22, X20-21 */ 5082 if (!cmos_handle) 5083 seq_printf(m, "status:\t\tnot supported\n"); 5084 else { 5085 seq_printf(m, "status:\t\tsupported\n"); 5086 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5087 } 5088 5089 return 0; 5090 } 5091 5092 static int cmos_write(char *buf) 5093 { 5094 char *cmd; 5095 int cmos_cmd, res; 5096 5097 while ((cmd = next_cmd(&buf))) { 5098 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5099 cmos_cmd >= 0 && cmos_cmd <= 21) { 5100 /* cmos_cmd set */ 5101 } else 5102 return -EINVAL; 5103 5104 res = issue_thinkpad_cmos_command(cmos_cmd); 5105 if (res) 5106 return res; 5107 } 5108 5109 return 0; 5110 } 5111 5112 static struct ibm_struct cmos_driver_data = { 5113 .name = "cmos", 5114 .read = cmos_read, 5115 .write = cmos_write, 5116 .exit = cmos_exit, 5117 }; 5118 5119 /************************************************************************* 5120 * LED subdriver 5121 */ 5122 5123 enum led_access_mode { 5124 TPACPI_LED_NONE = 0, 5125 TPACPI_LED_570, /* 570 */ 5126 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5127 TPACPI_LED_NEW, /* all others */ 5128 }; 5129 5130 enum { /* For TPACPI_LED_OLD */ 5131 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5132 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5133 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5134 }; 5135 5136 static enum led_access_mode led_supported; 5137 5138 static acpi_handle led_handle; 5139 5140 #define TPACPI_LED_NUMLEDS 16 5141 static struct tpacpi_led_classdev *tpacpi_leds; 5142 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5143 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5144 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5145 "tpacpi::power", 5146 "tpacpi:orange:batt", 5147 "tpacpi:green:batt", 5148 "tpacpi::dock_active", 5149 "tpacpi::bay_active", 5150 "tpacpi::dock_batt", 5151 "tpacpi::unknown_led", 5152 "tpacpi::standby", 5153 "tpacpi::dock_status1", 5154 "tpacpi::dock_status2", 5155 "tpacpi::unknown_led2", 5156 "tpacpi::unknown_led3", 5157 "tpacpi::thinkvantage", 5158 }; 5159 #define TPACPI_SAFE_LEDS 0x1081U 5160 5161 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5162 { 5163 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5164 return false; 5165 #else 5166 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5167 #endif 5168 } 5169 5170 static int led_get_status(const unsigned int led) 5171 { 5172 int status; 5173 enum led_status_t led_s; 5174 5175 switch (led_supported) { 5176 case TPACPI_LED_570: 5177 if (!acpi_evalf(ec_handle, 5178 &status, "GLED", "dd", 1 << led)) 5179 return -EIO; 5180 led_s = (status == 0) ? 5181 TPACPI_LED_OFF : 5182 ((status == 1) ? 5183 TPACPI_LED_ON : 5184 TPACPI_LED_BLINK); 5185 tpacpi_led_state_cache[led] = led_s; 5186 return led_s; 5187 default: 5188 return -ENXIO; 5189 } 5190 5191 /* not reached */ 5192 } 5193 5194 static int led_set_status(const unsigned int led, 5195 const enum led_status_t ledstatus) 5196 { 5197 /* off, on, blink. Index is led_status_t */ 5198 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5199 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5200 5201 int rc = 0; 5202 5203 switch (led_supported) { 5204 case TPACPI_LED_570: 5205 /* 570 */ 5206 if (unlikely(led > 7)) 5207 return -EINVAL; 5208 if (unlikely(tpacpi_is_led_restricted(led))) 5209 return -EPERM; 5210 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5211 (1 << led), led_sled_arg1[ledstatus])) 5212 rc = -EIO; 5213 break; 5214 case TPACPI_LED_OLD: 5215 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5216 if (unlikely(led > 7)) 5217 return -EINVAL; 5218 if (unlikely(tpacpi_is_led_restricted(led))) 5219 return -EPERM; 5220 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5221 if (rc >= 0) 5222 rc = ec_write(TPACPI_LED_EC_HLBL, 5223 (ledstatus == TPACPI_LED_BLINK) << led); 5224 if (rc >= 0) 5225 rc = ec_write(TPACPI_LED_EC_HLCL, 5226 (ledstatus != TPACPI_LED_OFF) << led); 5227 break; 5228 case TPACPI_LED_NEW: 5229 /* all others */ 5230 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5231 return -EINVAL; 5232 if (unlikely(tpacpi_is_led_restricted(led))) 5233 return -EPERM; 5234 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5235 led, led_led_arg1[ledstatus])) 5236 rc = -EIO; 5237 break; 5238 default: 5239 rc = -ENXIO; 5240 } 5241 5242 if (!rc) 5243 tpacpi_led_state_cache[led] = ledstatus; 5244 5245 return rc; 5246 } 5247 5248 static void led_set_status_worker(struct work_struct *work) 5249 { 5250 struct tpacpi_led_classdev *data = 5251 container_of(work, struct tpacpi_led_classdev, work); 5252 5253 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5254 led_set_status(data->led, data->new_state); 5255 } 5256 5257 static void led_sysfs_set(struct led_classdev *led_cdev, 5258 enum led_brightness brightness) 5259 { 5260 struct tpacpi_led_classdev *data = container_of(led_cdev, 5261 struct tpacpi_led_classdev, led_classdev); 5262 5263 if (brightness == LED_OFF) 5264 data->new_state = TPACPI_LED_OFF; 5265 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5266 data->new_state = TPACPI_LED_ON; 5267 else 5268 data->new_state = TPACPI_LED_BLINK; 5269 5270 queue_work(tpacpi_wq, &data->work); 5271 } 5272 5273 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5274 unsigned long *delay_on, unsigned long *delay_off) 5275 { 5276 struct tpacpi_led_classdev *data = container_of(led_cdev, 5277 struct tpacpi_led_classdev, led_classdev); 5278 5279 /* Can we choose the flash rate? */ 5280 if (*delay_on == 0 && *delay_off == 0) { 5281 /* yes. set them to the hardware blink rate (1 Hz) */ 5282 *delay_on = 500; /* ms */ 5283 *delay_off = 500; /* ms */ 5284 } else if ((*delay_on != 500) || (*delay_off != 500)) 5285 return -EINVAL; 5286 5287 data->new_state = TPACPI_LED_BLINK; 5288 queue_work(tpacpi_wq, &data->work); 5289 5290 return 0; 5291 } 5292 5293 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5294 { 5295 int rc; 5296 5297 struct tpacpi_led_classdev *data = container_of(led_cdev, 5298 struct tpacpi_led_classdev, led_classdev); 5299 5300 rc = led_get_status(data->led); 5301 5302 if (rc == TPACPI_LED_OFF || rc < 0) 5303 rc = LED_OFF; /* no error handling in led class :( */ 5304 else 5305 rc = LED_FULL; 5306 5307 return rc; 5308 } 5309 5310 static void led_exit(void) 5311 { 5312 unsigned int i; 5313 5314 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5315 if (tpacpi_leds[i].led_classdev.name) 5316 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5317 } 5318 5319 flush_workqueue(tpacpi_wq); 5320 kfree(tpacpi_leds); 5321 } 5322 5323 static int __init tpacpi_init_led(unsigned int led) 5324 { 5325 int rc; 5326 5327 tpacpi_leds[led].led = led; 5328 5329 /* LEDs with no name don't get registered */ 5330 if (!tpacpi_led_names[led]) 5331 return 0; 5332 5333 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5334 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5335 if (led_supported == TPACPI_LED_570) 5336 tpacpi_leds[led].led_classdev.brightness_get = 5337 &led_sysfs_get; 5338 5339 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5340 5341 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5342 5343 rc = led_classdev_register(&tpacpi_pdev->dev, 5344 &tpacpi_leds[led].led_classdev); 5345 if (rc < 0) 5346 tpacpi_leds[led].led_classdev.name = NULL; 5347 5348 return rc; 5349 } 5350 5351 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5352 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5353 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5354 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5355 5356 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5357 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5358 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5359 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5360 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5361 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5362 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5363 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5364 5365 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5366 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5367 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5368 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5369 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5370 5371 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5372 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5373 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5374 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5375 5376 /* (1) - may have excess leds enabled on MSB */ 5377 5378 /* Defaults (order matters, keep last, don't reorder!) */ 5379 { /* Lenovo */ 5380 .vendor = PCI_VENDOR_ID_LENOVO, 5381 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5382 .quirks = 0x1fffU, 5383 }, 5384 { /* IBM ThinkPads with no EC version string */ 5385 .vendor = PCI_VENDOR_ID_IBM, 5386 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5387 .quirks = 0x00ffU, 5388 }, 5389 { /* IBM ThinkPads with EC version string */ 5390 .vendor = PCI_VENDOR_ID_IBM, 5391 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5392 .quirks = 0x00bfU, 5393 }, 5394 }; 5395 5396 #undef TPACPI_LEDQ_IBM 5397 #undef TPACPI_LEDQ_LNV 5398 5399 static enum led_access_mode __init led_init_detect_mode(void) 5400 { 5401 acpi_status status; 5402 5403 if (tpacpi_is_ibm()) { 5404 /* 570 */ 5405 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5406 if (ACPI_SUCCESS(status)) 5407 return TPACPI_LED_570; 5408 5409 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5410 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5411 if (ACPI_SUCCESS(status)) 5412 return TPACPI_LED_OLD; 5413 } 5414 5415 /* most others */ 5416 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5417 if (ACPI_SUCCESS(status)) 5418 return TPACPI_LED_NEW; 5419 5420 /* R30, R31, and unknown firmwares */ 5421 led_handle = NULL; 5422 return TPACPI_LED_NONE; 5423 } 5424 5425 static int __init led_init(struct ibm_init_struct *iibm) 5426 { 5427 unsigned int i; 5428 int rc; 5429 unsigned long useful_leds; 5430 5431 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5432 5433 led_supported = led_init_detect_mode(); 5434 5435 if (led_supported != TPACPI_LED_NONE) { 5436 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5437 ARRAY_SIZE(led_useful_qtable)); 5438 5439 if (!useful_leds) { 5440 led_handle = NULL; 5441 led_supported = TPACPI_LED_NONE; 5442 } 5443 } 5444 5445 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5446 str_supported(led_supported), led_supported); 5447 5448 if (led_supported == TPACPI_LED_NONE) 5449 return 1; 5450 5451 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5452 GFP_KERNEL); 5453 if (!tpacpi_leds) { 5454 pr_err("Out of memory for LED data\n"); 5455 return -ENOMEM; 5456 } 5457 5458 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5459 tpacpi_leds[i].led = -1; 5460 5461 if (!tpacpi_is_led_restricted(i) && 5462 test_bit(i, &useful_leds)) { 5463 rc = tpacpi_init_led(i); 5464 if (rc < 0) { 5465 led_exit(); 5466 return rc; 5467 } 5468 } 5469 } 5470 5471 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5472 pr_notice("warning: userspace override of important " 5473 "firmware LEDs is enabled\n"); 5474 #endif 5475 return 0; 5476 } 5477 5478 #define str_led_status(s) \ 5479 ((s) == TPACPI_LED_OFF ? "off" : \ 5480 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5481 5482 static int led_read(struct seq_file *m) 5483 { 5484 if (!led_supported) { 5485 seq_printf(m, "status:\t\tnot supported\n"); 5486 return 0; 5487 } 5488 seq_printf(m, "status:\t\tsupported\n"); 5489 5490 if (led_supported == TPACPI_LED_570) { 5491 /* 570 */ 5492 int i, status; 5493 for (i = 0; i < 8; i++) { 5494 status = led_get_status(i); 5495 if (status < 0) 5496 return -EIO; 5497 seq_printf(m, "%d:\t\t%s\n", 5498 i, str_led_status(status)); 5499 } 5500 } 5501 5502 seq_printf(m, "commands:\t" 5503 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5504 5505 return 0; 5506 } 5507 5508 static int led_write(char *buf) 5509 { 5510 char *cmd; 5511 int led, rc; 5512 enum led_status_t s; 5513 5514 if (!led_supported) 5515 return -ENODEV; 5516 5517 while ((cmd = next_cmd(&buf))) { 5518 if (sscanf(cmd, "%d", &led) != 1) 5519 return -EINVAL; 5520 5521 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 5522 tpacpi_leds[led].led < 0) 5523 return -ENODEV; 5524 5525 if (strstr(cmd, "off")) { 5526 s = TPACPI_LED_OFF; 5527 } else if (strstr(cmd, "on")) { 5528 s = TPACPI_LED_ON; 5529 } else if (strstr(cmd, "blink")) { 5530 s = TPACPI_LED_BLINK; 5531 } else { 5532 return -EINVAL; 5533 } 5534 5535 rc = led_set_status(led, s); 5536 if (rc < 0) 5537 return rc; 5538 } 5539 5540 return 0; 5541 } 5542 5543 static struct ibm_struct led_driver_data = { 5544 .name = "led", 5545 .read = led_read, 5546 .write = led_write, 5547 .exit = led_exit, 5548 }; 5549 5550 /************************************************************************* 5551 * Beep subdriver 5552 */ 5553 5554 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5555 5556 #define TPACPI_BEEP_Q1 0x0001 5557 5558 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5559 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5560 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5561 }; 5562 5563 static int __init beep_init(struct ibm_init_struct *iibm) 5564 { 5565 unsigned long quirks; 5566 5567 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5568 5569 TPACPI_ACPIHANDLE_INIT(beep); 5570 5571 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5572 str_supported(beep_handle != NULL)); 5573 5574 quirks = tpacpi_check_quirks(beep_quirk_table, 5575 ARRAY_SIZE(beep_quirk_table)); 5576 5577 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5578 5579 return (beep_handle) ? 0 : 1; 5580 } 5581 5582 static int beep_read(struct seq_file *m) 5583 { 5584 if (!beep_handle) 5585 seq_printf(m, "status:\t\tnot supported\n"); 5586 else { 5587 seq_printf(m, "status:\t\tsupported\n"); 5588 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5589 } 5590 5591 return 0; 5592 } 5593 5594 static int beep_write(char *buf) 5595 { 5596 char *cmd; 5597 int beep_cmd; 5598 5599 if (!beep_handle) 5600 return -ENODEV; 5601 5602 while ((cmd = next_cmd(&buf))) { 5603 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 5604 beep_cmd >= 0 && beep_cmd <= 17) { 5605 /* beep_cmd set */ 5606 } else 5607 return -EINVAL; 5608 if (tp_features.beep_needs_two_args) { 5609 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 5610 beep_cmd, 0)) 5611 return -EIO; 5612 } else { 5613 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 5614 beep_cmd)) 5615 return -EIO; 5616 } 5617 } 5618 5619 return 0; 5620 } 5621 5622 static struct ibm_struct beep_driver_data = { 5623 .name = "beep", 5624 .read = beep_read, 5625 .write = beep_write, 5626 }; 5627 5628 /************************************************************************* 5629 * Thermal subdriver 5630 */ 5631 5632 enum thermal_access_mode { 5633 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 5634 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 5635 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 5636 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 5637 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 5638 }; 5639 5640 enum { /* TPACPI_THERMAL_TPEC_* */ 5641 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 5642 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 5643 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 5644 5645 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 5646 }; 5647 5648 5649 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 5650 struct ibm_thermal_sensors_struct { 5651 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 5652 }; 5653 5654 static enum thermal_access_mode thermal_read_mode; 5655 5656 /* idx is zero-based */ 5657 static int thermal_get_sensor(int idx, s32 *value) 5658 { 5659 int t; 5660 s8 tmp; 5661 char tmpi[5]; 5662 5663 t = TP_EC_THERMAL_TMP0; 5664 5665 switch (thermal_read_mode) { 5666 #if TPACPI_MAX_THERMAL_SENSORS >= 16 5667 case TPACPI_THERMAL_TPEC_16: 5668 if (idx >= 8 && idx <= 15) { 5669 t = TP_EC_THERMAL_TMP8; 5670 idx -= 8; 5671 } 5672 /* fallthrough */ 5673 #endif 5674 case TPACPI_THERMAL_TPEC_8: 5675 if (idx <= 7) { 5676 if (!acpi_ec_read(t + idx, &tmp)) 5677 return -EIO; 5678 *value = tmp * 1000; 5679 return 0; 5680 } 5681 break; 5682 5683 case TPACPI_THERMAL_ACPI_UPDT: 5684 if (idx <= 7) { 5685 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5686 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 5687 return -EIO; 5688 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5689 return -EIO; 5690 *value = (t - 2732) * 100; 5691 return 0; 5692 } 5693 break; 5694 5695 case TPACPI_THERMAL_ACPI_TMP07: 5696 if (idx <= 7) { 5697 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5698 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5699 return -EIO; 5700 if (t > 127 || t < -127) 5701 t = TP_EC_THERMAL_TMP_NA; 5702 *value = t * 1000; 5703 return 0; 5704 } 5705 break; 5706 5707 case TPACPI_THERMAL_NONE: 5708 default: 5709 return -ENOSYS; 5710 } 5711 5712 return -EINVAL; 5713 } 5714 5715 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 5716 { 5717 int res, i; 5718 int n; 5719 5720 n = 8; 5721 i = 0; 5722 5723 if (!s) 5724 return -EINVAL; 5725 5726 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 5727 n = 16; 5728 5729 for (i = 0 ; i < n; i++) { 5730 res = thermal_get_sensor(i, &s->temp[i]); 5731 if (res) 5732 return res; 5733 } 5734 5735 return n; 5736 } 5737 5738 static void thermal_dump_all_sensors(void) 5739 { 5740 int n, i; 5741 struct ibm_thermal_sensors_struct t; 5742 5743 n = thermal_get_sensors(&t); 5744 if (n <= 0) 5745 return; 5746 5747 pr_notice("temperatures (Celsius):"); 5748 5749 for (i = 0; i < n; i++) { 5750 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 5751 pr_cont(" %d", (int)(t.temp[i] / 1000)); 5752 else 5753 pr_cont(" N/A"); 5754 } 5755 5756 pr_cont("\n"); 5757 } 5758 5759 /* sysfs temp##_input -------------------------------------------------- */ 5760 5761 static ssize_t thermal_temp_input_show(struct device *dev, 5762 struct device_attribute *attr, 5763 char *buf) 5764 { 5765 struct sensor_device_attribute *sensor_attr = 5766 to_sensor_dev_attr(attr); 5767 int idx = sensor_attr->index; 5768 s32 value; 5769 int res; 5770 5771 res = thermal_get_sensor(idx, &value); 5772 if (res) 5773 return res; 5774 if (value == TPACPI_THERMAL_SENSOR_NA) 5775 return -ENXIO; 5776 5777 return snprintf(buf, PAGE_SIZE, "%d\n", value); 5778 } 5779 5780 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 5781 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 5782 thermal_temp_input_show, NULL, _idxB) 5783 5784 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 5785 THERMAL_SENSOR_ATTR_TEMP(1, 0), 5786 THERMAL_SENSOR_ATTR_TEMP(2, 1), 5787 THERMAL_SENSOR_ATTR_TEMP(3, 2), 5788 THERMAL_SENSOR_ATTR_TEMP(4, 3), 5789 THERMAL_SENSOR_ATTR_TEMP(5, 4), 5790 THERMAL_SENSOR_ATTR_TEMP(6, 5), 5791 THERMAL_SENSOR_ATTR_TEMP(7, 6), 5792 THERMAL_SENSOR_ATTR_TEMP(8, 7), 5793 THERMAL_SENSOR_ATTR_TEMP(9, 8), 5794 THERMAL_SENSOR_ATTR_TEMP(10, 9), 5795 THERMAL_SENSOR_ATTR_TEMP(11, 10), 5796 THERMAL_SENSOR_ATTR_TEMP(12, 11), 5797 THERMAL_SENSOR_ATTR_TEMP(13, 12), 5798 THERMAL_SENSOR_ATTR_TEMP(14, 13), 5799 THERMAL_SENSOR_ATTR_TEMP(15, 14), 5800 THERMAL_SENSOR_ATTR_TEMP(16, 15), 5801 }; 5802 5803 #define THERMAL_ATTRS(X) \ 5804 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 5805 5806 static struct attribute *thermal_temp_input_attr[] = { 5807 THERMAL_ATTRS(8), 5808 THERMAL_ATTRS(9), 5809 THERMAL_ATTRS(10), 5810 THERMAL_ATTRS(11), 5811 THERMAL_ATTRS(12), 5812 THERMAL_ATTRS(13), 5813 THERMAL_ATTRS(14), 5814 THERMAL_ATTRS(15), 5815 THERMAL_ATTRS(0), 5816 THERMAL_ATTRS(1), 5817 THERMAL_ATTRS(2), 5818 THERMAL_ATTRS(3), 5819 THERMAL_ATTRS(4), 5820 THERMAL_ATTRS(5), 5821 THERMAL_ATTRS(6), 5822 THERMAL_ATTRS(7), 5823 NULL 5824 }; 5825 5826 static const struct attribute_group thermal_temp_input16_group = { 5827 .attrs = thermal_temp_input_attr 5828 }; 5829 5830 static const struct attribute_group thermal_temp_input8_group = { 5831 .attrs = &thermal_temp_input_attr[8] 5832 }; 5833 5834 #undef THERMAL_SENSOR_ATTR_TEMP 5835 #undef THERMAL_ATTRS 5836 5837 /* --------------------------------------------------------------------- */ 5838 5839 static int __init thermal_init(struct ibm_init_struct *iibm) 5840 { 5841 u8 t, ta1, ta2; 5842 int i; 5843 int acpi_tmp7; 5844 int res; 5845 5846 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 5847 5848 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 5849 5850 if (thinkpad_id.ec_model) { 5851 /* 5852 * Direct EC access mode: sensors at registers 5853 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 5854 * non-implemented, thermal sensors return 0x80 when 5855 * not available 5856 */ 5857 5858 ta1 = ta2 = 0; 5859 for (i = 0; i < 8; i++) { 5860 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 5861 ta1 |= t; 5862 } else { 5863 ta1 = 0; 5864 break; 5865 } 5866 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 5867 ta2 |= t; 5868 } else { 5869 ta1 = 0; 5870 break; 5871 } 5872 } 5873 if (ta1 == 0) { 5874 /* This is sheer paranoia, but we handle it anyway */ 5875 if (acpi_tmp7) { 5876 pr_err("ThinkPad ACPI EC access misbehaving, " 5877 "falling back to ACPI TMPx access " 5878 "mode\n"); 5879 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5880 } else { 5881 pr_err("ThinkPad ACPI EC access misbehaving, " 5882 "disabling thermal sensors access\n"); 5883 thermal_read_mode = TPACPI_THERMAL_NONE; 5884 } 5885 } else { 5886 thermal_read_mode = 5887 (ta2 != 0) ? 5888 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 5889 } 5890 } else if (acpi_tmp7) { 5891 if (tpacpi_is_ibm() && 5892 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 5893 /* 600e/x, 770e, 770x */ 5894 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 5895 } else { 5896 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 5897 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5898 } 5899 } else { 5900 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 5901 thermal_read_mode = TPACPI_THERMAL_NONE; 5902 } 5903 5904 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 5905 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 5906 thermal_read_mode); 5907 5908 switch (thermal_read_mode) { 5909 case TPACPI_THERMAL_TPEC_16: 5910 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5911 &thermal_temp_input16_group); 5912 if (res) 5913 return res; 5914 break; 5915 case TPACPI_THERMAL_TPEC_8: 5916 case TPACPI_THERMAL_ACPI_TMP07: 5917 case TPACPI_THERMAL_ACPI_UPDT: 5918 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5919 &thermal_temp_input8_group); 5920 if (res) 5921 return res; 5922 break; 5923 case TPACPI_THERMAL_NONE: 5924 default: 5925 return 1; 5926 } 5927 5928 return 0; 5929 } 5930 5931 static void thermal_exit(void) 5932 { 5933 switch (thermal_read_mode) { 5934 case TPACPI_THERMAL_TPEC_16: 5935 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5936 &thermal_temp_input16_group); 5937 break; 5938 case TPACPI_THERMAL_TPEC_8: 5939 case TPACPI_THERMAL_ACPI_TMP07: 5940 case TPACPI_THERMAL_ACPI_UPDT: 5941 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5942 &thermal_temp_input8_group); 5943 break; 5944 case TPACPI_THERMAL_NONE: 5945 default: 5946 break; 5947 } 5948 } 5949 5950 static int thermal_read(struct seq_file *m) 5951 { 5952 int n, i; 5953 struct ibm_thermal_sensors_struct t; 5954 5955 n = thermal_get_sensors(&t); 5956 if (unlikely(n < 0)) 5957 return n; 5958 5959 seq_printf(m, "temperatures:\t"); 5960 5961 if (n > 0) { 5962 for (i = 0; i < (n - 1); i++) 5963 seq_printf(m, "%d ", t.temp[i] / 1000); 5964 seq_printf(m, "%d\n", t.temp[i] / 1000); 5965 } else 5966 seq_printf(m, "not supported\n"); 5967 5968 return 0; 5969 } 5970 5971 static struct ibm_struct thermal_driver_data = { 5972 .name = "thermal", 5973 .read = thermal_read, 5974 .exit = thermal_exit, 5975 }; 5976 5977 /************************************************************************* 5978 * Backlight/brightness subdriver 5979 */ 5980 5981 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 5982 5983 /* 5984 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 5985 * CMOS NVRAM byte 0x5E, bits 0-3. 5986 * 5987 * EC HBRV (0x31) has the following layout 5988 * Bit 7: unknown function 5989 * Bit 6: unknown function 5990 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 5991 * Bit 4: must be set to zero to avoid problems 5992 * Bit 3-0: backlight brightness level 5993 * 5994 * brightness_get_raw returns status data in the HBRV layout 5995 * 5996 * WARNING: The X61 has been verified to use HBRV for something else, so 5997 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 5998 * testing on the very early *60 Lenovo models... 5999 */ 6000 6001 enum { 6002 TP_EC_BACKLIGHT = 0x31, 6003 6004 /* TP_EC_BACKLIGHT bitmasks */ 6005 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6006 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6007 TP_EC_BACKLIGHT_MAPSW = 0x20, 6008 }; 6009 6010 enum tpacpi_brightness_access_mode { 6011 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6012 TPACPI_BRGHT_MODE_EC, /* EC control */ 6013 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6014 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6015 TPACPI_BRGHT_MODE_MAX 6016 }; 6017 6018 static struct backlight_device *ibm_backlight_device; 6019 6020 static enum tpacpi_brightness_access_mode brightness_mode = 6021 TPACPI_BRGHT_MODE_MAX; 6022 6023 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6024 6025 static struct mutex brightness_mutex; 6026 6027 /* NVRAM brightness access, 6028 * call with brightness_mutex held! */ 6029 static unsigned int tpacpi_brightness_nvram_get(void) 6030 { 6031 u8 lnvram; 6032 6033 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6034 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6035 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6036 lnvram &= bright_maxlvl; 6037 6038 return lnvram; 6039 } 6040 6041 static void tpacpi_brightness_checkpoint_nvram(void) 6042 { 6043 u8 lec = 0; 6044 u8 b_nvram; 6045 6046 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6047 return; 6048 6049 vdbg_printk(TPACPI_DBG_BRGHT, 6050 "trying to checkpoint backlight level to NVRAM...\n"); 6051 6052 if (mutex_lock_killable(&brightness_mutex) < 0) 6053 return; 6054 6055 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6056 goto unlock; 6057 lec &= TP_EC_BACKLIGHT_LVLMSK; 6058 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6059 6060 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6061 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6062 /* NVRAM needs update */ 6063 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6064 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6065 b_nvram |= lec; 6066 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6067 dbg_printk(TPACPI_DBG_BRGHT, 6068 "updated NVRAM backlight level to %u (0x%02x)\n", 6069 (unsigned int) lec, (unsigned int) b_nvram); 6070 } else 6071 vdbg_printk(TPACPI_DBG_BRGHT, 6072 "NVRAM backlight level already is %u (0x%02x)\n", 6073 (unsigned int) lec, (unsigned int) b_nvram); 6074 6075 unlock: 6076 mutex_unlock(&brightness_mutex); 6077 } 6078 6079 6080 /* call with brightness_mutex held! */ 6081 static int tpacpi_brightness_get_raw(int *status) 6082 { 6083 u8 lec = 0; 6084 6085 switch (brightness_mode) { 6086 case TPACPI_BRGHT_MODE_UCMS_STEP: 6087 *status = tpacpi_brightness_nvram_get(); 6088 return 0; 6089 case TPACPI_BRGHT_MODE_EC: 6090 case TPACPI_BRGHT_MODE_ECNVRAM: 6091 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6092 return -EIO; 6093 *status = lec; 6094 return 0; 6095 default: 6096 return -ENXIO; 6097 } 6098 } 6099 6100 /* call with brightness_mutex held! */ 6101 /* do NOT call with illegal backlight level value */ 6102 static int tpacpi_brightness_set_ec(unsigned int value) 6103 { 6104 u8 lec = 0; 6105 6106 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6107 return -EIO; 6108 6109 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6110 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6111 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6112 return -EIO; 6113 6114 return 0; 6115 } 6116 6117 /* call with brightness_mutex held! */ 6118 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6119 { 6120 int cmos_cmd, inc; 6121 unsigned int current_value, i; 6122 6123 current_value = tpacpi_brightness_nvram_get(); 6124 6125 if (value == current_value) 6126 return 0; 6127 6128 cmos_cmd = (value > current_value) ? 6129 TP_CMOS_BRIGHTNESS_UP : 6130 TP_CMOS_BRIGHTNESS_DOWN; 6131 inc = (value > current_value) ? 1 : -1; 6132 6133 for (i = current_value; i != value; i += inc) 6134 if (issue_thinkpad_cmos_command(cmos_cmd)) 6135 return -EIO; 6136 6137 return 0; 6138 } 6139 6140 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6141 static int brightness_set(unsigned int value) 6142 { 6143 int res; 6144 6145 if (value > bright_maxlvl) 6146 return -EINVAL; 6147 6148 vdbg_printk(TPACPI_DBG_BRGHT, 6149 "set backlight level to %d\n", value); 6150 6151 res = mutex_lock_killable(&brightness_mutex); 6152 if (res < 0) 6153 return res; 6154 6155 switch (brightness_mode) { 6156 case TPACPI_BRGHT_MODE_EC: 6157 case TPACPI_BRGHT_MODE_ECNVRAM: 6158 res = tpacpi_brightness_set_ec(value); 6159 break; 6160 case TPACPI_BRGHT_MODE_UCMS_STEP: 6161 res = tpacpi_brightness_set_ucmsstep(value); 6162 break; 6163 default: 6164 res = -ENXIO; 6165 } 6166 6167 mutex_unlock(&brightness_mutex); 6168 return res; 6169 } 6170 6171 /* sysfs backlight class ----------------------------------------------- */ 6172 6173 static int brightness_update_status(struct backlight_device *bd) 6174 { 6175 unsigned int level = 6176 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6177 bd->props.power == FB_BLANK_UNBLANK) ? 6178 bd->props.brightness : 0; 6179 6180 dbg_printk(TPACPI_DBG_BRGHT, 6181 "backlight: attempt to set level to %d\n", 6182 level); 6183 6184 /* it is the backlight class's job (caller) to handle 6185 * EINTR and other errors properly */ 6186 return brightness_set(level); 6187 } 6188 6189 static int brightness_get(struct backlight_device *bd) 6190 { 6191 int status, res; 6192 6193 res = mutex_lock_killable(&brightness_mutex); 6194 if (res < 0) 6195 return 0; 6196 6197 res = tpacpi_brightness_get_raw(&status); 6198 6199 mutex_unlock(&brightness_mutex); 6200 6201 if (res < 0) 6202 return 0; 6203 6204 return status & TP_EC_BACKLIGHT_LVLMSK; 6205 } 6206 6207 static void tpacpi_brightness_notify_change(void) 6208 { 6209 backlight_force_update(ibm_backlight_device, 6210 BACKLIGHT_UPDATE_HOTKEY); 6211 } 6212 6213 static const struct backlight_ops ibm_backlight_data = { 6214 .get_brightness = brightness_get, 6215 .update_status = brightness_update_status, 6216 }; 6217 6218 /* --------------------------------------------------------------------- */ 6219 6220 /* 6221 * Call _BCL method of video device. On some ThinkPads this will 6222 * switch the firmware to the ACPI brightness control mode. 6223 */ 6224 6225 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6226 { 6227 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6228 union acpi_object *obj; 6229 struct acpi_device *device, *child; 6230 int rc; 6231 6232 if (acpi_bus_get_device(handle, &device)) 6233 return 0; 6234 6235 rc = 0; 6236 list_for_each_entry(child, &device->children, node) { 6237 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6238 NULL, &buffer); 6239 if (ACPI_FAILURE(status)) 6240 continue; 6241 6242 obj = (union acpi_object *)buffer.pointer; 6243 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6244 pr_err("Unknown _BCL data, please report this to %s\n", 6245 TPACPI_MAIL); 6246 rc = 0; 6247 } else { 6248 rc = obj->package.count; 6249 } 6250 break; 6251 } 6252 6253 kfree(buffer.pointer); 6254 return rc; 6255 } 6256 6257 6258 /* 6259 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6260 */ 6261 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6262 { 6263 acpi_handle video_device; 6264 int bcl_levels = 0; 6265 6266 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6267 if (video_device) 6268 bcl_levels = tpacpi_query_bcl_levels(video_device); 6269 6270 tp_features.bright_acpimode = (bcl_levels > 0); 6271 6272 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6273 } 6274 6275 /* 6276 * These are only useful for models that have only one possibility 6277 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6278 * these quirks. 6279 */ 6280 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6281 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6282 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6283 6284 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6285 /* Models with ATI GPUs known to require ECNVRAM mode */ 6286 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6287 6288 /* Models with ATI GPUs that can use ECNVRAM */ 6289 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6290 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6291 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6292 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6293 6294 /* Models with Intel Extreme Graphics 2 */ 6295 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6296 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6297 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6298 6299 /* Models with Intel GMA900 */ 6300 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6301 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6302 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6303 }; 6304 6305 /* 6306 * Returns < 0 for error, otherwise sets tp_features.bright_* 6307 * and bright_maxlvl. 6308 */ 6309 static void __init tpacpi_detect_brightness_capabilities(void) 6310 { 6311 unsigned int b; 6312 6313 vdbg_printk(TPACPI_DBG_INIT, 6314 "detecting firmware brightness interface capabilities\n"); 6315 6316 /* we could run a quirks check here (same table used by 6317 * brightness_init) if needed */ 6318 6319 /* 6320 * We always attempt to detect acpi support, so as to switch 6321 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6322 * going to publish a backlight interface 6323 */ 6324 b = tpacpi_check_std_acpi_brightness_support(); 6325 switch (b) { 6326 case 16: 6327 bright_maxlvl = 15; 6328 pr_info("detected a 16-level brightness capable ThinkPad\n"); 6329 break; 6330 case 8: 6331 case 0: 6332 bright_maxlvl = 7; 6333 pr_info("detected a 8-level brightness capable ThinkPad\n"); 6334 break; 6335 default: 6336 pr_err("Unsupported brightness interface, " 6337 "please contact %s\n", TPACPI_MAIL); 6338 tp_features.bright_unkfw = 1; 6339 bright_maxlvl = b - 1; 6340 } 6341 } 6342 6343 static int __init brightness_init(struct ibm_init_struct *iibm) 6344 { 6345 struct backlight_properties props; 6346 int b; 6347 unsigned long quirks; 6348 6349 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6350 6351 mutex_init(&brightness_mutex); 6352 6353 quirks = tpacpi_check_quirks(brightness_quirk_table, 6354 ARRAY_SIZE(brightness_quirk_table)); 6355 6356 /* tpacpi_detect_brightness_capabilities() must have run already */ 6357 6358 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6359 if (tp_features.bright_unkfw) 6360 return 1; 6361 6362 if (!brightness_enable) { 6363 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6364 "brightness support disabled by " 6365 "module parameter\n"); 6366 return 1; 6367 } 6368 6369 if (acpi_video_backlight_support()) { 6370 if (brightness_enable > 1) { 6371 pr_info("Standard ACPI backlight interface " 6372 "available, not loading native one\n"); 6373 return 1; 6374 } else if (brightness_enable == 1) { 6375 pr_warn("Cannot enable backlight brightness support, " 6376 "ACPI is already handling it. Refer to the " 6377 "acpi_backlight kernel parameter.\n"); 6378 return 1; 6379 } 6380 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6381 pr_notice("Standard ACPI backlight interface not " 6382 "available, thinkpad_acpi native " 6383 "brightness control enabled\n"); 6384 } 6385 6386 /* 6387 * Check for module parameter bogosity, note that we 6388 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6389 * able to detect "unspecified" 6390 */ 6391 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6392 return -EINVAL; 6393 6394 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6395 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6396 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6397 if (quirks & TPACPI_BRGHT_Q_EC) 6398 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6399 else 6400 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6401 6402 dbg_printk(TPACPI_DBG_BRGHT, 6403 "driver auto-selected brightness_mode=%d\n", 6404 brightness_mode); 6405 } 6406 6407 /* Safety */ 6408 if (!tpacpi_is_ibm() && 6409 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6410 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6411 return -EINVAL; 6412 6413 if (tpacpi_brightness_get_raw(&b) < 0) 6414 return 1; 6415 6416 memset(&props, 0, sizeof(struct backlight_properties)); 6417 props.type = BACKLIGHT_PLATFORM; 6418 props.max_brightness = bright_maxlvl; 6419 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6420 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6421 NULL, NULL, 6422 &ibm_backlight_data, 6423 &props); 6424 if (IS_ERR(ibm_backlight_device)) { 6425 int rc = PTR_ERR(ibm_backlight_device); 6426 ibm_backlight_device = NULL; 6427 pr_err("Could not register backlight device\n"); 6428 return rc; 6429 } 6430 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6431 "brightness is supported\n"); 6432 6433 if (quirks & TPACPI_BRGHT_Q_ASK) { 6434 pr_notice("brightness: will use unverified default: " 6435 "brightness_mode=%d\n", brightness_mode); 6436 pr_notice("brightness: please report to %s whether it works well " 6437 "or not on your ThinkPad\n", TPACPI_MAIL); 6438 } 6439 6440 /* Added by mistake in early 2007. Probably useless, but it could 6441 * be working around some unknown firmware problem where the value 6442 * read at startup doesn't match the real hardware state... so leave 6443 * it in place just in case */ 6444 backlight_update_status(ibm_backlight_device); 6445 6446 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6447 "brightness: registering brightness hotkeys " 6448 "as change notification\n"); 6449 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6450 | TP_ACPI_HKEY_BRGHTUP_MASK 6451 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6452 return 0; 6453 } 6454 6455 static void brightness_suspend(void) 6456 { 6457 tpacpi_brightness_checkpoint_nvram(); 6458 } 6459 6460 static void brightness_shutdown(void) 6461 { 6462 tpacpi_brightness_checkpoint_nvram(); 6463 } 6464 6465 static void brightness_exit(void) 6466 { 6467 if (ibm_backlight_device) { 6468 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6469 "calling backlight_device_unregister()\n"); 6470 backlight_device_unregister(ibm_backlight_device); 6471 } 6472 6473 tpacpi_brightness_checkpoint_nvram(); 6474 } 6475 6476 static int brightness_read(struct seq_file *m) 6477 { 6478 int level; 6479 6480 level = brightness_get(NULL); 6481 if (level < 0) { 6482 seq_printf(m, "level:\t\tunreadable\n"); 6483 } else { 6484 seq_printf(m, "level:\t\t%d\n", level); 6485 seq_printf(m, "commands:\tup, down\n"); 6486 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6487 bright_maxlvl); 6488 } 6489 6490 return 0; 6491 } 6492 6493 static int brightness_write(char *buf) 6494 { 6495 int level; 6496 int rc; 6497 char *cmd; 6498 6499 level = brightness_get(NULL); 6500 if (level < 0) 6501 return level; 6502 6503 while ((cmd = next_cmd(&buf))) { 6504 if (strlencmp(cmd, "up") == 0) { 6505 if (level < bright_maxlvl) 6506 level++; 6507 } else if (strlencmp(cmd, "down") == 0) { 6508 if (level > 0) 6509 level--; 6510 } else if (sscanf(cmd, "level %d", &level) == 1 && 6511 level >= 0 && level <= bright_maxlvl) { 6512 /* new level set */ 6513 } else 6514 return -EINVAL; 6515 } 6516 6517 tpacpi_disclose_usertask("procfs brightness", 6518 "set level to %d\n", level); 6519 6520 /* 6521 * Now we know what the final level should be, so we try to set it. 6522 * Doing it this way makes the syscall restartable in case of EINTR 6523 */ 6524 rc = brightness_set(level); 6525 if (!rc && ibm_backlight_device) 6526 backlight_force_update(ibm_backlight_device, 6527 BACKLIGHT_UPDATE_SYSFS); 6528 return (rc == -EINTR) ? -ERESTARTSYS : rc; 6529 } 6530 6531 static struct ibm_struct brightness_driver_data = { 6532 .name = "brightness", 6533 .read = brightness_read, 6534 .write = brightness_write, 6535 .exit = brightness_exit, 6536 .suspend = brightness_suspend, 6537 .shutdown = brightness_shutdown, 6538 }; 6539 6540 /************************************************************************* 6541 * Volume subdriver 6542 */ 6543 6544 /* 6545 * IBM ThinkPads have a simple volume controller with MUTE gating. 6546 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 6547 * 6548 * Since the *61 series (and probably also the later *60 series), Lenovo 6549 * ThinkPads only implement the MUTE gate. 6550 * 6551 * EC register 0x30 6552 * Bit 6: MUTE (1 mutes sound) 6553 * Bit 3-0: Volume 6554 * Other bits should be zero as far as we know. 6555 * 6556 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 6557 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 6558 * such as bit 7 which is used to detect repeated presses of MUTE, 6559 * and we leave them unchanged. 6560 * 6561 * On newer Lenovo ThinkPads, the EC can automatically change the volume 6562 * in response to user input. Unfortunately, this rarely works well. 6563 * The laptop changes the state of its internal MUTE gate and, on some 6564 * models, sends KEY_MUTE, causing any user code that responds to the 6565 * mute button to get confused. The hardware MUTE gate is also 6566 * unnecessary, since user code can handle the mute button without 6567 * kernel or EC help. 6568 * 6569 * To avoid confusing userspace, we simply disable all EC-based mute 6570 * and volume controls when possible. 6571 */ 6572 6573 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 6574 6575 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 6576 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 6577 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 6578 6579 #if SNDRV_CARDS <= 32 6580 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 6581 #else 6582 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 6583 #endif 6584 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 6585 static char *alsa_id = "ThinkPadEC"; 6586 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 6587 6588 struct tpacpi_alsa_data { 6589 struct snd_card *card; 6590 struct snd_ctl_elem_id *ctl_mute_id; 6591 struct snd_ctl_elem_id *ctl_vol_id; 6592 }; 6593 6594 static struct snd_card *alsa_card; 6595 6596 enum { 6597 TP_EC_AUDIO = 0x30, 6598 6599 /* TP_EC_AUDIO bits */ 6600 TP_EC_AUDIO_MUTESW = 6, 6601 6602 /* TP_EC_AUDIO bitmasks */ 6603 TP_EC_AUDIO_LVL_MSK = 0x0F, 6604 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 6605 6606 /* Maximum volume */ 6607 TP_EC_VOLUME_MAX = 14, 6608 }; 6609 6610 enum tpacpi_volume_access_mode { 6611 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 6612 TPACPI_VOL_MODE_EC, /* Pure EC control */ 6613 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 6614 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6615 TPACPI_VOL_MODE_MAX 6616 }; 6617 6618 enum tpacpi_volume_capabilities { 6619 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 6620 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 6621 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 6622 TPACPI_VOL_CAP_MAX 6623 }; 6624 6625 enum tpacpi_mute_btn_mode { 6626 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 6627 /* We don't know what mode 1 is. */ 6628 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 6629 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 6630 }; 6631 6632 static enum tpacpi_volume_access_mode volume_mode = 6633 TPACPI_VOL_MODE_MAX; 6634 6635 static enum tpacpi_volume_capabilities volume_capabilities; 6636 static bool volume_control_allowed; 6637 static bool software_mute_requested = true; 6638 static bool software_mute_active; 6639 static int software_mute_orig_mode; 6640 6641 /* 6642 * Used to syncronize writers to TP_EC_AUDIO and 6643 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 6644 */ 6645 static struct mutex volume_mutex; 6646 6647 static void tpacpi_volume_checkpoint_nvram(void) 6648 { 6649 u8 lec = 0; 6650 u8 b_nvram; 6651 u8 ec_mask; 6652 6653 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 6654 return; 6655 if (!volume_control_allowed) 6656 return; 6657 if (software_mute_active) 6658 return; 6659 6660 vdbg_printk(TPACPI_DBG_MIXER, 6661 "trying to checkpoint mixer state to NVRAM...\n"); 6662 6663 if (tp_features.mixer_no_level_control) 6664 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 6665 else 6666 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 6667 6668 if (mutex_lock_killable(&volume_mutex) < 0) 6669 return; 6670 6671 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 6672 goto unlock; 6673 lec &= ec_mask; 6674 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 6675 6676 if (lec != (b_nvram & ec_mask)) { 6677 /* NVRAM needs update */ 6678 b_nvram &= ~ec_mask; 6679 b_nvram |= lec; 6680 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 6681 dbg_printk(TPACPI_DBG_MIXER, 6682 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 6683 (unsigned int) lec, (unsigned int) b_nvram); 6684 } else { 6685 vdbg_printk(TPACPI_DBG_MIXER, 6686 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 6687 (unsigned int) lec, (unsigned int) b_nvram); 6688 } 6689 6690 unlock: 6691 mutex_unlock(&volume_mutex); 6692 } 6693 6694 static int volume_get_status_ec(u8 *status) 6695 { 6696 u8 s; 6697 6698 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 6699 return -EIO; 6700 6701 *status = s; 6702 6703 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 6704 6705 return 0; 6706 } 6707 6708 static int volume_get_status(u8 *status) 6709 { 6710 return volume_get_status_ec(status); 6711 } 6712 6713 static int volume_set_status_ec(const u8 status) 6714 { 6715 if (!acpi_ec_write(TP_EC_AUDIO, status)) 6716 return -EIO; 6717 6718 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 6719 6720 /* 6721 * On X200s, and possibly on others, it can take a while for 6722 * reads to become correct. 6723 */ 6724 msleep(1); 6725 6726 return 0; 6727 } 6728 6729 static int volume_set_status(const u8 status) 6730 { 6731 return volume_set_status_ec(status); 6732 } 6733 6734 /* returns < 0 on error, 0 on no change, 1 on change */ 6735 static int __volume_set_mute_ec(const bool mute) 6736 { 6737 int rc; 6738 u8 s, n; 6739 6740 if (mutex_lock_killable(&volume_mutex) < 0) 6741 return -EINTR; 6742 6743 rc = volume_get_status_ec(&s); 6744 if (rc) 6745 goto unlock; 6746 6747 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 6748 s & ~TP_EC_AUDIO_MUTESW_MSK; 6749 6750 if (n != s) { 6751 rc = volume_set_status_ec(n); 6752 if (!rc) 6753 rc = 1; 6754 } 6755 6756 unlock: 6757 mutex_unlock(&volume_mutex); 6758 return rc; 6759 } 6760 6761 static int volume_alsa_set_mute(const bool mute) 6762 { 6763 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 6764 (mute) ? "" : "un"); 6765 return __volume_set_mute_ec(mute); 6766 } 6767 6768 static int volume_set_mute(const bool mute) 6769 { 6770 int rc; 6771 6772 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 6773 (mute) ? "" : "un"); 6774 6775 rc = __volume_set_mute_ec(mute); 6776 return (rc < 0) ? rc : 0; 6777 } 6778 6779 /* returns < 0 on error, 0 on no change, 1 on change */ 6780 static int __volume_set_volume_ec(const u8 vol) 6781 { 6782 int rc; 6783 u8 s, n; 6784 6785 if (vol > TP_EC_VOLUME_MAX) 6786 return -EINVAL; 6787 6788 if (mutex_lock_killable(&volume_mutex) < 0) 6789 return -EINTR; 6790 6791 rc = volume_get_status_ec(&s); 6792 if (rc) 6793 goto unlock; 6794 6795 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 6796 6797 if (n != s) { 6798 rc = volume_set_status_ec(n); 6799 if (!rc) 6800 rc = 1; 6801 } 6802 6803 unlock: 6804 mutex_unlock(&volume_mutex); 6805 return rc; 6806 } 6807 6808 static int volume_set_software_mute(bool startup) 6809 { 6810 int result; 6811 6812 if (!tpacpi_is_lenovo()) 6813 return -ENODEV; 6814 6815 if (startup) { 6816 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 6817 "HAUM", "qd")) 6818 return -EIO; 6819 6820 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6821 "Initial HAUM setting was %d\n", 6822 software_mute_orig_mode); 6823 } 6824 6825 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 6826 (int)TP_EC_MUTE_BTN_NONE)) 6827 return -EIO; 6828 6829 if (result != TP_EC_MUTE_BTN_NONE) 6830 pr_warn("Unexpected SAUM result %d\n", 6831 result); 6832 6833 /* 6834 * In software mute mode, the standard codec controls take 6835 * precendence, so we unmute the ThinkPad HW switch at 6836 * startup. Just on case there are SAUM-capable ThinkPads 6837 * with level controls, set max HW volume as well. 6838 */ 6839 if (tp_features.mixer_no_level_control) 6840 result = volume_set_mute(false); 6841 else 6842 result = volume_set_status(TP_EC_VOLUME_MAX); 6843 6844 if (result != 0) 6845 pr_warn("Failed to unmute the HW mute switch\n"); 6846 6847 return 0; 6848 } 6849 6850 static void volume_exit_software_mute(void) 6851 { 6852 int r; 6853 6854 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 6855 || r != software_mute_orig_mode) 6856 pr_warn("Failed to restore mute mode\n"); 6857 } 6858 6859 static int volume_alsa_set_volume(const u8 vol) 6860 { 6861 dbg_printk(TPACPI_DBG_MIXER, 6862 "ALSA: trying to set volume level to %hu\n", vol); 6863 return __volume_set_volume_ec(vol); 6864 } 6865 6866 static void volume_alsa_notify_change(void) 6867 { 6868 struct tpacpi_alsa_data *d; 6869 6870 if (alsa_card && alsa_card->private_data) { 6871 d = alsa_card->private_data; 6872 if (d->ctl_mute_id) 6873 snd_ctl_notify(alsa_card, 6874 SNDRV_CTL_EVENT_MASK_VALUE, 6875 d->ctl_mute_id); 6876 if (d->ctl_vol_id) 6877 snd_ctl_notify(alsa_card, 6878 SNDRV_CTL_EVENT_MASK_VALUE, 6879 d->ctl_vol_id); 6880 } 6881 } 6882 6883 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 6884 struct snd_ctl_elem_info *uinfo) 6885 { 6886 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 6887 uinfo->count = 1; 6888 uinfo->value.integer.min = 0; 6889 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 6890 return 0; 6891 } 6892 6893 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 6894 struct snd_ctl_elem_value *ucontrol) 6895 { 6896 u8 s; 6897 int rc; 6898 6899 rc = volume_get_status(&s); 6900 if (rc < 0) 6901 return rc; 6902 6903 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 6904 return 0; 6905 } 6906 6907 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 6908 struct snd_ctl_elem_value *ucontrol) 6909 { 6910 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 6911 ucontrol->value.integer.value[0]); 6912 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 6913 } 6914 6915 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 6916 6917 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 6918 struct snd_ctl_elem_value *ucontrol) 6919 { 6920 u8 s; 6921 int rc; 6922 6923 rc = volume_get_status(&s); 6924 if (rc < 0) 6925 return rc; 6926 6927 ucontrol->value.integer.value[0] = 6928 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 6929 return 0; 6930 } 6931 6932 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 6933 struct snd_ctl_elem_value *ucontrol) 6934 { 6935 tpacpi_disclose_usertask("ALSA", "%smute\n", 6936 ucontrol->value.integer.value[0] ? 6937 "un" : ""); 6938 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 6939 } 6940 6941 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 6942 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6943 .name = "Console Playback Volume", 6944 .index = 0, 6945 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6946 .info = volume_alsa_vol_info, 6947 .get = volume_alsa_vol_get, 6948 }; 6949 6950 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 6951 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6952 .name = "Console Playback Switch", 6953 .index = 0, 6954 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6955 .info = volume_alsa_mute_info, 6956 .get = volume_alsa_mute_get, 6957 }; 6958 6959 static void volume_suspend(void) 6960 { 6961 tpacpi_volume_checkpoint_nvram(); 6962 } 6963 6964 static void volume_resume(void) 6965 { 6966 if (software_mute_active) { 6967 if (volume_set_software_mute(false) < 0) 6968 pr_warn("Failed to restore software mute\n"); 6969 } else { 6970 volume_alsa_notify_change(); 6971 } 6972 } 6973 6974 static void volume_shutdown(void) 6975 { 6976 tpacpi_volume_checkpoint_nvram(); 6977 } 6978 6979 static void volume_exit(void) 6980 { 6981 if (alsa_card) { 6982 snd_card_free(alsa_card); 6983 alsa_card = NULL; 6984 } 6985 6986 tpacpi_volume_checkpoint_nvram(); 6987 6988 if (software_mute_active) 6989 volume_exit_software_mute(); 6990 } 6991 6992 static int __init volume_create_alsa_mixer(void) 6993 { 6994 struct snd_card *card; 6995 struct tpacpi_alsa_data *data; 6996 struct snd_kcontrol *ctl_vol; 6997 struct snd_kcontrol *ctl_mute; 6998 int rc; 6999 7000 rc = snd_card_new(&tpacpi_pdev->dev, 7001 alsa_index, alsa_id, THIS_MODULE, 7002 sizeof(struct tpacpi_alsa_data), &card); 7003 if (rc < 0 || !card) { 7004 pr_err("Failed to create ALSA card structures: %d\n", rc); 7005 return 1; 7006 } 7007 7008 BUG_ON(!card->private_data); 7009 data = card->private_data; 7010 data->card = card; 7011 7012 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7013 sizeof(card->driver)); 7014 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7015 sizeof(card->shortname)); 7016 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7017 (thinkpad_id.ec_version_str) ? 7018 thinkpad_id.ec_version_str : "(unknown)"); 7019 snprintf(card->longname, sizeof(card->longname), 7020 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7021 (thinkpad_id.ec_version_str) ? 7022 thinkpad_id.ec_version_str : "unknown"); 7023 7024 if (volume_control_allowed) { 7025 volume_alsa_control_vol.put = volume_alsa_vol_put; 7026 volume_alsa_control_vol.access = 7027 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7028 7029 volume_alsa_control_mute.put = volume_alsa_mute_put; 7030 volume_alsa_control_mute.access = 7031 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7032 } 7033 7034 if (!tp_features.mixer_no_level_control) { 7035 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7036 rc = snd_ctl_add(card, ctl_vol); 7037 if (rc < 0) { 7038 pr_err("Failed to create ALSA volume control: %d\n", 7039 rc); 7040 goto err_exit; 7041 } 7042 data->ctl_vol_id = &ctl_vol->id; 7043 } 7044 7045 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7046 rc = snd_ctl_add(card, ctl_mute); 7047 if (rc < 0) { 7048 pr_err("Failed to create ALSA mute control: %d\n", rc); 7049 goto err_exit; 7050 } 7051 data->ctl_mute_id = &ctl_mute->id; 7052 7053 rc = snd_card_register(card); 7054 if (rc < 0) { 7055 pr_err("Failed to register ALSA card: %d\n", rc); 7056 goto err_exit; 7057 } 7058 7059 alsa_card = card; 7060 return 0; 7061 7062 err_exit: 7063 snd_card_free(card); 7064 return 1; 7065 } 7066 7067 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7068 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7069 7070 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7071 /* Whitelist volume level on all IBM by default */ 7072 { .vendor = PCI_VENDOR_ID_IBM, 7073 .bios = TPACPI_MATCH_ANY, 7074 .ec = TPACPI_MATCH_ANY, 7075 .quirks = TPACPI_VOL_Q_LEVEL }, 7076 7077 /* Lenovo models with volume control (needs confirmation) */ 7078 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7079 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7080 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7081 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7082 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7083 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7084 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7085 7086 /* Whitelist mute-only on all Lenovo by default */ 7087 { .vendor = PCI_VENDOR_ID_LENOVO, 7088 .bios = TPACPI_MATCH_ANY, 7089 .ec = TPACPI_MATCH_ANY, 7090 .quirks = TPACPI_VOL_Q_MUTEONLY } 7091 }; 7092 7093 static int __init volume_init(struct ibm_init_struct *iibm) 7094 { 7095 unsigned long quirks; 7096 int rc; 7097 7098 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7099 7100 mutex_init(&volume_mutex); 7101 7102 /* 7103 * Check for module parameter bogosity, note that we 7104 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7105 * able to detect "unspecified" 7106 */ 7107 if (volume_mode > TPACPI_VOL_MODE_MAX) 7108 return -EINVAL; 7109 7110 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7111 pr_err("UCMS step volume mode not implemented, " 7112 "please contact %s\n", TPACPI_MAIL); 7113 return 1; 7114 } 7115 7116 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7117 return -EINVAL; 7118 7119 /* 7120 * The ALSA mixer is our primary interface. 7121 * When disabled, don't install the subdriver at all 7122 */ 7123 if (!alsa_enable) { 7124 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7125 "ALSA mixer disabled by parameter, " 7126 "not loading volume subdriver...\n"); 7127 return 1; 7128 } 7129 7130 quirks = tpacpi_check_quirks(volume_quirk_table, 7131 ARRAY_SIZE(volume_quirk_table)); 7132 7133 switch (volume_capabilities) { 7134 case TPACPI_VOL_CAP_AUTO: 7135 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7136 tp_features.mixer_no_level_control = 1; 7137 else if (quirks & TPACPI_VOL_Q_LEVEL) 7138 tp_features.mixer_no_level_control = 0; 7139 else 7140 return 1; /* no mixer */ 7141 break; 7142 case TPACPI_VOL_CAP_VOLMUTE: 7143 tp_features.mixer_no_level_control = 0; 7144 break; 7145 case TPACPI_VOL_CAP_MUTEONLY: 7146 tp_features.mixer_no_level_control = 1; 7147 break; 7148 default: 7149 return 1; 7150 } 7151 7152 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7153 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7154 "using user-supplied volume_capabilities=%d\n", 7155 volume_capabilities); 7156 7157 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7158 volume_mode == TPACPI_VOL_MODE_MAX) { 7159 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7160 7161 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7162 "driver auto-selected volume_mode=%d\n", 7163 volume_mode); 7164 } else { 7165 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7166 "using user-supplied volume_mode=%d\n", 7167 volume_mode); 7168 } 7169 7170 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7171 "mute is supported, volume control is %s\n", 7172 str_supported(!tp_features.mixer_no_level_control)); 7173 7174 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7175 software_mute_active = true; 7176 } else { 7177 rc = volume_create_alsa_mixer(); 7178 if (rc) { 7179 pr_err("Could not create the ALSA mixer interface\n"); 7180 return rc; 7181 } 7182 7183 pr_info("Console audio control enabled, mode: %s\n", 7184 (volume_control_allowed) ? 7185 "override (read/write)" : 7186 "monitor (read only)"); 7187 } 7188 7189 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7190 "registering volume hotkeys as change notification\n"); 7191 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7192 | TP_ACPI_HKEY_VOLUP_MASK 7193 | TP_ACPI_HKEY_VOLDWN_MASK 7194 | TP_ACPI_HKEY_MUTE_MASK); 7195 7196 return 0; 7197 } 7198 7199 static int volume_read(struct seq_file *m) 7200 { 7201 u8 status; 7202 7203 if (volume_get_status(&status) < 0) { 7204 seq_printf(m, "level:\t\tunreadable\n"); 7205 } else { 7206 if (tp_features.mixer_no_level_control) 7207 seq_printf(m, "level:\t\tunsupported\n"); 7208 else 7209 seq_printf(m, "level:\t\t%d\n", 7210 status & TP_EC_AUDIO_LVL_MSK); 7211 7212 seq_printf(m, "mute:\t\t%s\n", 7213 onoff(status, TP_EC_AUDIO_MUTESW)); 7214 7215 if (volume_control_allowed) { 7216 seq_printf(m, "commands:\tunmute, mute\n"); 7217 if (!tp_features.mixer_no_level_control) { 7218 seq_printf(m, 7219 "commands:\tup, down\n"); 7220 seq_printf(m, 7221 "commands:\tlevel <level>" 7222 " (<level> is 0-%d)\n", 7223 TP_EC_VOLUME_MAX); 7224 } 7225 } 7226 } 7227 7228 return 0; 7229 } 7230 7231 static int volume_write(char *buf) 7232 { 7233 u8 s; 7234 u8 new_level, new_mute; 7235 int l; 7236 char *cmd; 7237 int rc; 7238 7239 /* 7240 * We do allow volume control at driver startup, so that the 7241 * user can set initial state through the volume=... parameter hack. 7242 */ 7243 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7244 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7245 tp_warned.volume_ctrl_forbidden = 1; 7246 pr_notice("Console audio control in monitor mode, " 7247 "changes are not allowed\n"); 7248 pr_notice("Use the volume_control=1 module parameter " 7249 "to enable volume control\n"); 7250 } 7251 return -EPERM; 7252 } 7253 7254 rc = volume_get_status(&s); 7255 if (rc < 0) 7256 return rc; 7257 7258 new_level = s & TP_EC_AUDIO_LVL_MSK; 7259 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7260 7261 while ((cmd = next_cmd(&buf))) { 7262 if (!tp_features.mixer_no_level_control) { 7263 if (strlencmp(cmd, "up") == 0) { 7264 if (new_mute) 7265 new_mute = 0; 7266 else if (new_level < TP_EC_VOLUME_MAX) 7267 new_level++; 7268 continue; 7269 } else if (strlencmp(cmd, "down") == 0) { 7270 if (new_mute) 7271 new_mute = 0; 7272 else if (new_level > 0) 7273 new_level--; 7274 continue; 7275 } else if (sscanf(cmd, "level %u", &l) == 1 && 7276 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7277 new_level = l; 7278 continue; 7279 } 7280 } 7281 if (strlencmp(cmd, "mute") == 0) 7282 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7283 else if (strlencmp(cmd, "unmute") == 0) 7284 new_mute = 0; 7285 else 7286 return -EINVAL; 7287 } 7288 7289 if (tp_features.mixer_no_level_control) { 7290 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7291 new_mute ? "" : "un"); 7292 rc = volume_set_mute(!!new_mute); 7293 } else { 7294 tpacpi_disclose_usertask("procfs volume", 7295 "%smute and set level to %d\n", 7296 new_mute ? "" : "un", new_level); 7297 rc = volume_set_status(new_mute | new_level); 7298 } 7299 volume_alsa_notify_change(); 7300 7301 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7302 } 7303 7304 static struct ibm_struct volume_driver_data = { 7305 .name = "volume", 7306 .read = volume_read, 7307 .write = volume_write, 7308 .exit = volume_exit, 7309 .suspend = volume_suspend, 7310 .resume = volume_resume, 7311 .shutdown = volume_shutdown, 7312 }; 7313 7314 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7315 7316 #define alsa_card NULL 7317 7318 static void inline volume_alsa_notify_change(void) 7319 { 7320 } 7321 7322 static int __init volume_init(struct ibm_init_struct *iibm) 7323 { 7324 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7325 7326 return 1; 7327 } 7328 7329 static struct ibm_struct volume_driver_data = { 7330 .name = "volume", 7331 }; 7332 7333 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7334 7335 /************************************************************************* 7336 * Fan subdriver 7337 */ 7338 7339 /* 7340 * FAN ACCESS MODES 7341 * 7342 * TPACPI_FAN_RD_ACPI_GFAN: 7343 * ACPI GFAN method: returns fan level 7344 * 7345 * see TPACPI_FAN_WR_ACPI_SFAN 7346 * EC 0x2f (HFSP) not available if GFAN exists 7347 * 7348 * TPACPI_FAN_WR_ACPI_SFAN: 7349 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7350 * 7351 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7352 * it for writing. 7353 * 7354 * TPACPI_FAN_WR_TPEC: 7355 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7356 * Supported on almost all ThinkPads 7357 * 7358 * Fan speed changes of any sort (including those caused by the 7359 * disengaged mode) are usually done slowly by the firmware as the 7360 * maximum amount of fan duty cycle change per second seems to be 7361 * limited. 7362 * 7363 * Reading is not available if GFAN exists. 7364 * Writing is not available if SFAN exists. 7365 * 7366 * Bits 7367 * 7 automatic mode engaged; 7368 * (default operation mode of the ThinkPad) 7369 * fan level is ignored in this mode. 7370 * 6 full speed mode (takes precedence over bit 7); 7371 * not available on all thinkpads. May disable 7372 * the tachometer while the fan controller ramps up 7373 * the speed (which can take up to a few *minutes*). 7374 * Speeds up fan to 100% duty-cycle, which is far above 7375 * the standard RPM levels. It is not impossible that 7376 * it could cause hardware damage. 7377 * 5-3 unused in some models. Extra bits for fan level 7378 * in others, but still useless as all values above 7379 * 7 map to the same speed as level 7 in these models. 7380 * 2-0 fan level (0..7 usually) 7381 * 0x00 = stop 7382 * 0x07 = max (set when temperatures critical) 7383 * Some ThinkPads may have other levels, see 7384 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7385 * 7386 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7387 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7388 * does so, its initial value is meaningless (0x07). 7389 * 7390 * For firmware bugs, refer to: 7391 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7392 * 7393 * ---- 7394 * 7395 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7396 * Main fan tachometer reading (in RPM) 7397 * 7398 * This register is present on all ThinkPads with a new-style EC, and 7399 * it is known not to be present on the A21m/e, and T22, as there is 7400 * something else in offset 0x84 according to the ACPI DSDT. Other 7401 * ThinkPads from this same time period (and earlier) probably lack the 7402 * tachometer as well. 7403 * 7404 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7405 * was never fixed by IBM to report the EC firmware version string 7406 * probably support the tachometer (like the early X models), so 7407 * detecting it is quite hard. We need more data to know for sure. 7408 * 7409 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7410 * might result. 7411 * 7412 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7413 * mode. 7414 * 7415 * For firmware bugs, refer to: 7416 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7417 * 7418 * ---- 7419 * 7420 * ThinkPad EC register 0x31 bit 0 (only on select models) 7421 * 7422 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7423 * show the speed of the main fan. When bit 0 of EC register 0x31 7424 * is one, the tachometer registers show the speed of the auxiliary 7425 * fan. 7426 * 7427 * Fan control seems to affect both fans, regardless of the state 7428 * of this bit. 7429 * 7430 * So far, only the firmware for the X60/X61 non-tablet versions 7431 * seem to support this (firmware TP-7M). 7432 * 7433 * TPACPI_FAN_WR_ACPI_FANS: 7434 * ThinkPad X31, X40, X41. Not available in the X60. 7435 * 7436 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7437 * high speed. ACPI DSDT seems to map these three speeds to levels 7438 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7439 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7440 * 7441 * The speeds are stored on handles 7442 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7443 * 7444 * There are three default speed sets, accessible as handles: 7445 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7446 * 7447 * ACPI DSDT switches which set is in use depending on various 7448 * factors. 7449 * 7450 * TPACPI_FAN_WR_TPEC is also available and should be used to 7451 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7452 * but the ACPI tables just mention level 7. 7453 */ 7454 7455 enum { /* Fan control constants */ 7456 fan_status_offset = 0x2f, /* EC register 0x2f */ 7457 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7458 * 0x84 must be read before 0x85 */ 7459 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7460 bit 0 selects which fan is active */ 7461 7462 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7463 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7464 7465 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7466 }; 7467 7468 enum fan_status_access_mode { 7469 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7470 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7471 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7472 }; 7473 7474 enum fan_control_access_mode { 7475 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7476 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7477 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7478 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7479 }; 7480 7481 enum fan_control_commands { 7482 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7483 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7484 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7485 * and also watchdog cmd */ 7486 }; 7487 7488 static bool fan_control_allowed; 7489 7490 static enum fan_status_access_mode fan_status_access_mode; 7491 static enum fan_control_access_mode fan_control_access_mode; 7492 static enum fan_control_commands fan_control_commands; 7493 7494 static u8 fan_control_initial_status; 7495 static u8 fan_control_desired_level; 7496 static u8 fan_control_resume_level; 7497 static int fan_watchdog_maxinterval; 7498 7499 static struct mutex fan_mutex; 7500 7501 static void fan_watchdog_fire(struct work_struct *ignored); 7502 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7503 7504 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7505 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7506 "\\FSPD", /* 600e/x, 770e, 770x */ 7507 ); /* all others */ 7508 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7509 "JFNS", /* 770x-JL */ 7510 ); /* all others */ 7511 7512 /* 7513 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7514 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7515 * be in auto mode (0x80). 7516 * 7517 * This is corrected by any write to HFSP either by the driver, or 7518 * by the firmware. 7519 * 7520 * We assume 0x07 really means auto mode while this quirk is active, 7521 * as this is far more likely than the ThinkPad being in level 7, 7522 * which is only used by the firmware during thermal emergencies. 7523 * 7524 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7525 * TP-70 (T43, R52), which are known to be buggy. 7526 */ 7527 7528 static void fan_quirk1_setup(void) 7529 { 7530 if (fan_control_initial_status == 0x07) { 7531 pr_notice("fan_init: initial fan status is unknown, " 7532 "assuming it is in auto mode\n"); 7533 tp_features.fan_ctrl_status_undef = 1; 7534 } 7535 } 7536 7537 static void fan_quirk1_handle(u8 *fan_status) 7538 { 7539 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7540 if (*fan_status != fan_control_initial_status) { 7541 /* something changed the HFSP regisnter since 7542 * driver init time, so it is not undefined 7543 * anymore */ 7544 tp_features.fan_ctrl_status_undef = 0; 7545 } else { 7546 /* Return most likely status. In fact, it 7547 * might be the only possible status */ 7548 *fan_status = TP_EC_FAN_AUTO; 7549 } 7550 } 7551 } 7552 7553 /* Select main fan on X60/X61, NOOP on others */ 7554 static bool fan_select_fan1(void) 7555 { 7556 if (tp_features.second_fan) { 7557 u8 val; 7558 7559 if (ec_read(fan_select_offset, &val) < 0) 7560 return false; 7561 val &= 0xFEU; 7562 if (ec_write(fan_select_offset, val) < 0) 7563 return false; 7564 } 7565 return true; 7566 } 7567 7568 /* Select secondary fan on X60/X61 */ 7569 static bool fan_select_fan2(void) 7570 { 7571 u8 val; 7572 7573 if (!tp_features.second_fan) 7574 return false; 7575 7576 if (ec_read(fan_select_offset, &val) < 0) 7577 return false; 7578 val |= 0x01U; 7579 if (ec_write(fan_select_offset, val) < 0) 7580 return false; 7581 7582 return true; 7583 } 7584 7585 /* 7586 * Call with fan_mutex held 7587 */ 7588 static void fan_update_desired_level(u8 status) 7589 { 7590 if ((status & 7591 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7592 if (status > 7) 7593 fan_control_desired_level = 7; 7594 else 7595 fan_control_desired_level = status; 7596 } 7597 } 7598 7599 static int fan_get_status(u8 *status) 7600 { 7601 u8 s; 7602 7603 /* TODO: 7604 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 7605 7606 switch (fan_status_access_mode) { 7607 case TPACPI_FAN_RD_ACPI_GFAN: { 7608 /* 570, 600e/x, 770e, 770x */ 7609 int res; 7610 7611 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 7612 return -EIO; 7613 7614 if (likely(status)) 7615 *status = res & 0x07; 7616 7617 break; 7618 } 7619 case TPACPI_FAN_RD_TPEC: 7620 /* all except 570, 600e/x, 770e, 770x */ 7621 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 7622 return -EIO; 7623 7624 if (likely(status)) { 7625 *status = s; 7626 fan_quirk1_handle(status); 7627 } 7628 7629 break; 7630 7631 default: 7632 return -ENXIO; 7633 } 7634 7635 return 0; 7636 } 7637 7638 static int fan_get_status_safe(u8 *status) 7639 { 7640 int rc; 7641 u8 s; 7642 7643 if (mutex_lock_killable(&fan_mutex)) 7644 return -ERESTARTSYS; 7645 rc = fan_get_status(&s); 7646 if (!rc) 7647 fan_update_desired_level(s); 7648 mutex_unlock(&fan_mutex); 7649 7650 if (status) 7651 *status = s; 7652 7653 return rc; 7654 } 7655 7656 static int fan_get_speed(unsigned int *speed) 7657 { 7658 u8 hi, lo; 7659 7660 switch (fan_status_access_mode) { 7661 case TPACPI_FAN_RD_TPEC: 7662 /* all except 570, 600e/x, 770e, 770x */ 7663 if (unlikely(!fan_select_fan1())) 7664 return -EIO; 7665 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 7666 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 7667 return -EIO; 7668 7669 if (likely(speed)) 7670 *speed = (hi << 8) | lo; 7671 7672 break; 7673 7674 default: 7675 return -ENXIO; 7676 } 7677 7678 return 0; 7679 } 7680 7681 static int fan2_get_speed(unsigned int *speed) 7682 { 7683 u8 hi, lo; 7684 bool rc; 7685 7686 switch (fan_status_access_mode) { 7687 case TPACPI_FAN_RD_TPEC: 7688 /* all except 570, 600e/x, 770e, 770x */ 7689 if (unlikely(!fan_select_fan2())) 7690 return -EIO; 7691 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 7692 !acpi_ec_read(fan_rpm_offset + 1, &hi); 7693 fan_select_fan1(); /* play it safe */ 7694 if (rc) 7695 return -EIO; 7696 7697 if (likely(speed)) 7698 *speed = (hi << 8) | lo; 7699 7700 break; 7701 7702 default: 7703 return -ENXIO; 7704 } 7705 7706 return 0; 7707 } 7708 7709 static int fan_set_level(int level) 7710 { 7711 if (!fan_control_allowed) 7712 return -EPERM; 7713 7714 switch (fan_control_access_mode) { 7715 case TPACPI_FAN_WR_ACPI_SFAN: 7716 if (level >= 0 && level <= 7) { 7717 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 7718 return -EIO; 7719 } else 7720 return -EINVAL; 7721 break; 7722 7723 case TPACPI_FAN_WR_ACPI_FANS: 7724 case TPACPI_FAN_WR_TPEC: 7725 if (!(level & TP_EC_FAN_AUTO) && 7726 !(level & TP_EC_FAN_FULLSPEED) && 7727 ((level < 0) || (level > 7))) 7728 return -EINVAL; 7729 7730 /* safety net should the EC not support AUTO 7731 * or FULLSPEED mode bits and just ignore them */ 7732 if (level & TP_EC_FAN_FULLSPEED) 7733 level |= 7; /* safety min speed 7 */ 7734 else if (level & TP_EC_FAN_AUTO) 7735 level |= 4; /* safety min speed 4 */ 7736 7737 if (!acpi_ec_write(fan_status_offset, level)) 7738 return -EIO; 7739 else 7740 tp_features.fan_ctrl_status_undef = 0; 7741 break; 7742 7743 default: 7744 return -ENXIO; 7745 } 7746 7747 vdbg_printk(TPACPI_DBG_FAN, 7748 "fan control: set fan control register to 0x%02x\n", level); 7749 return 0; 7750 } 7751 7752 static int fan_set_level_safe(int level) 7753 { 7754 int rc; 7755 7756 if (!fan_control_allowed) 7757 return -EPERM; 7758 7759 if (mutex_lock_killable(&fan_mutex)) 7760 return -ERESTARTSYS; 7761 7762 if (level == TPACPI_FAN_LAST_LEVEL) 7763 level = fan_control_desired_level; 7764 7765 rc = fan_set_level(level); 7766 if (!rc) 7767 fan_update_desired_level(level); 7768 7769 mutex_unlock(&fan_mutex); 7770 return rc; 7771 } 7772 7773 static int fan_set_enable(void) 7774 { 7775 u8 s; 7776 int rc; 7777 7778 if (!fan_control_allowed) 7779 return -EPERM; 7780 7781 if (mutex_lock_killable(&fan_mutex)) 7782 return -ERESTARTSYS; 7783 7784 switch (fan_control_access_mode) { 7785 case TPACPI_FAN_WR_ACPI_FANS: 7786 case TPACPI_FAN_WR_TPEC: 7787 rc = fan_get_status(&s); 7788 if (rc < 0) 7789 break; 7790 7791 /* Don't go out of emergency fan mode */ 7792 if (s != 7) { 7793 s &= 0x07; 7794 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 7795 } 7796 7797 if (!acpi_ec_write(fan_status_offset, s)) 7798 rc = -EIO; 7799 else { 7800 tp_features.fan_ctrl_status_undef = 0; 7801 rc = 0; 7802 } 7803 break; 7804 7805 case TPACPI_FAN_WR_ACPI_SFAN: 7806 rc = fan_get_status(&s); 7807 if (rc < 0) 7808 break; 7809 7810 s &= 0x07; 7811 7812 /* Set fan to at least level 4 */ 7813 s |= 4; 7814 7815 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 7816 rc = -EIO; 7817 else 7818 rc = 0; 7819 break; 7820 7821 default: 7822 rc = -ENXIO; 7823 } 7824 7825 mutex_unlock(&fan_mutex); 7826 7827 if (!rc) 7828 vdbg_printk(TPACPI_DBG_FAN, 7829 "fan control: set fan control register to 0x%02x\n", 7830 s); 7831 return rc; 7832 } 7833 7834 static int fan_set_disable(void) 7835 { 7836 int rc; 7837 7838 if (!fan_control_allowed) 7839 return -EPERM; 7840 7841 if (mutex_lock_killable(&fan_mutex)) 7842 return -ERESTARTSYS; 7843 7844 rc = 0; 7845 switch (fan_control_access_mode) { 7846 case TPACPI_FAN_WR_ACPI_FANS: 7847 case TPACPI_FAN_WR_TPEC: 7848 if (!acpi_ec_write(fan_status_offset, 0x00)) 7849 rc = -EIO; 7850 else { 7851 fan_control_desired_level = 0; 7852 tp_features.fan_ctrl_status_undef = 0; 7853 } 7854 break; 7855 7856 case TPACPI_FAN_WR_ACPI_SFAN: 7857 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 7858 rc = -EIO; 7859 else 7860 fan_control_desired_level = 0; 7861 break; 7862 7863 default: 7864 rc = -ENXIO; 7865 } 7866 7867 if (!rc) 7868 vdbg_printk(TPACPI_DBG_FAN, 7869 "fan control: set fan control register to 0\n"); 7870 7871 mutex_unlock(&fan_mutex); 7872 return rc; 7873 } 7874 7875 static int fan_set_speed(int speed) 7876 { 7877 int rc; 7878 7879 if (!fan_control_allowed) 7880 return -EPERM; 7881 7882 if (mutex_lock_killable(&fan_mutex)) 7883 return -ERESTARTSYS; 7884 7885 rc = 0; 7886 switch (fan_control_access_mode) { 7887 case TPACPI_FAN_WR_ACPI_FANS: 7888 if (speed >= 0 && speed <= 65535) { 7889 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 7890 speed, speed, speed)) 7891 rc = -EIO; 7892 } else 7893 rc = -EINVAL; 7894 break; 7895 7896 default: 7897 rc = -ENXIO; 7898 } 7899 7900 mutex_unlock(&fan_mutex); 7901 return rc; 7902 } 7903 7904 static void fan_watchdog_reset(void) 7905 { 7906 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 7907 return; 7908 7909 if (fan_watchdog_maxinterval > 0 && 7910 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 7911 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 7912 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 7913 else 7914 cancel_delayed_work(&fan_watchdog_task); 7915 } 7916 7917 static void fan_watchdog_fire(struct work_struct *ignored) 7918 { 7919 int rc; 7920 7921 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 7922 return; 7923 7924 pr_notice("fan watchdog: enabling fan\n"); 7925 rc = fan_set_enable(); 7926 if (rc < 0) { 7927 pr_err("fan watchdog: error %d while enabling fan, " 7928 "will try again later...\n", -rc); 7929 /* reschedule for later */ 7930 fan_watchdog_reset(); 7931 } 7932 } 7933 7934 /* 7935 * SYSFS fan layout: hwmon compatible (device) 7936 * 7937 * pwm*_enable: 7938 * 0: "disengaged" mode 7939 * 1: manual mode 7940 * 2: native EC "auto" mode (recommended, hardware default) 7941 * 7942 * pwm*: set speed in manual mode, ignored otherwise. 7943 * 0 is level 0; 255 is level 7. Intermediate points done with linear 7944 * interpolation. 7945 * 7946 * fan*_input: tachometer reading, RPM 7947 * 7948 * 7949 * SYSFS fan layout: extensions 7950 * 7951 * fan_watchdog (driver): 7952 * fan watchdog interval in seconds, 0 disables (default), max 120 7953 */ 7954 7955 /* sysfs fan pwm1_enable ----------------------------------------------- */ 7956 static ssize_t fan_pwm1_enable_show(struct device *dev, 7957 struct device_attribute *attr, 7958 char *buf) 7959 { 7960 int res, mode; 7961 u8 status; 7962 7963 res = fan_get_status_safe(&status); 7964 if (res) 7965 return res; 7966 7967 if (status & TP_EC_FAN_FULLSPEED) { 7968 mode = 0; 7969 } else if (status & TP_EC_FAN_AUTO) { 7970 mode = 2; 7971 } else 7972 mode = 1; 7973 7974 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 7975 } 7976 7977 static ssize_t fan_pwm1_enable_store(struct device *dev, 7978 struct device_attribute *attr, 7979 const char *buf, size_t count) 7980 { 7981 unsigned long t; 7982 int res, level; 7983 7984 if (parse_strtoul(buf, 2, &t)) 7985 return -EINVAL; 7986 7987 tpacpi_disclose_usertask("hwmon pwm1_enable", 7988 "set fan mode to %lu\n", t); 7989 7990 switch (t) { 7991 case 0: 7992 level = TP_EC_FAN_FULLSPEED; 7993 break; 7994 case 1: 7995 level = TPACPI_FAN_LAST_LEVEL; 7996 break; 7997 case 2: 7998 level = TP_EC_FAN_AUTO; 7999 break; 8000 case 3: 8001 /* reserved for software-controlled auto mode */ 8002 return -ENOSYS; 8003 default: 8004 return -EINVAL; 8005 } 8006 8007 res = fan_set_level_safe(level); 8008 if (res == -ENXIO) 8009 return -EINVAL; 8010 else if (res < 0) 8011 return res; 8012 8013 fan_watchdog_reset(); 8014 8015 return count; 8016 } 8017 8018 static struct device_attribute dev_attr_fan_pwm1_enable = 8019 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8020 fan_pwm1_enable_show, fan_pwm1_enable_store); 8021 8022 /* sysfs fan pwm1 ------------------------------------------------------ */ 8023 static ssize_t fan_pwm1_show(struct device *dev, 8024 struct device_attribute *attr, 8025 char *buf) 8026 { 8027 int res; 8028 u8 status; 8029 8030 res = fan_get_status_safe(&status); 8031 if (res) 8032 return res; 8033 8034 if ((status & 8035 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8036 status = fan_control_desired_level; 8037 8038 if (status > 7) 8039 status = 7; 8040 8041 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8042 } 8043 8044 static ssize_t fan_pwm1_store(struct device *dev, 8045 struct device_attribute *attr, 8046 const char *buf, size_t count) 8047 { 8048 unsigned long s; 8049 int rc; 8050 u8 status, newlevel; 8051 8052 if (parse_strtoul(buf, 255, &s)) 8053 return -EINVAL; 8054 8055 tpacpi_disclose_usertask("hwmon pwm1", 8056 "set fan speed to %lu\n", s); 8057 8058 /* scale down from 0-255 to 0-7 */ 8059 newlevel = (s >> 5) & 0x07; 8060 8061 if (mutex_lock_killable(&fan_mutex)) 8062 return -ERESTARTSYS; 8063 8064 rc = fan_get_status(&status); 8065 if (!rc && (status & 8066 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8067 rc = fan_set_level(newlevel); 8068 if (rc == -ENXIO) 8069 rc = -EINVAL; 8070 else if (!rc) { 8071 fan_update_desired_level(newlevel); 8072 fan_watchdog_reset(); 8073 } 8074 } 8075 8076 mutex_unlock(&fan_mutex); 8077 return (rc) ? rc : count; 8078 } 8079 8080 static struct device_attribute dev_attr_fan_pwm1 = 8081 __ATTR(pwm1, S_IWUSR | S_IRUGO, 8082 fan_pwm1_show, fan_pwm1_store); 8083 8084 /* sysfs fan fan1_input ------------------------------------------------ */ 8085 static ssize_t fan_fan1_input_show(struct device *dev, 8086 struct device_attribute *attr, 8087 char *buf) 8088 { 8089 int res; 8090 unsigned int speed; 8091 8092 res = fan_get_speed(&speed); 8093 if (res < 0) 8094 return res; 8095 8096 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8097 } 8098 8099 static struct device_attribute dev_attr_fan_fan1_input = 8100 __ATTR(fan1_input, S_IRUGO, 8101 fan_fan1_input_show, NULL); 8102 8103 /* sysfs fan fan2_input ------------------------------------------------ */ 8104 static ssize_t fan_fan2_input_show(struct device *dev, 8105 struct device_attribute *attr, 8106 char *buf) 8107 { 8108 int res; 8109 unsigned int speed; 8110 8111 res = fan2_get_speed(&speed); 8112 if (res < 0) 8113 return res; 8114 8115 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8116 } 8117 8118 static struct device_attribute dev_attr_fan_fan2_input = 8119 __ATTR(fan2_input, S_IRUGO, 8120 fan_fan2_input_show, NULL); 8121 8122 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8123 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 8124 char *buf) 8125 { 8126 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8127 } 8128 8129 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 8130 const char *buf, size_t count) 8131 { 8132 unsigned long t; 8133 8134 if (parse_strtoul(buf, 120, &t)) 8135 return -EINVAL; 8136 8137 if (!fan_control_allowed) 8138 return -EPERM; 8139 8140 fan_watchdog_maxinterval = t; 8141 fan_watchdog_reset(); 8142 8143 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8144 8145 return count; 8146 } 8147 8148 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 8149 fan_fan_watchdog_show, fan_fan_watchdog_store); 8150 8151 /* --------------------------------------------------------------------- */ 8152 static struct attribute *fan_attributes[] = { 8153 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr, 8154 &dev_attr_fan_fan1_input.attr, 8155 NULL, /* for fan2_input */ 8156 NULL 8157 }; 8158 8159 static const struct attribute_group fan_attr_group = { 8160 .attrs = fan_attributes, 8161 }; 8162 8163 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8164 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8165 8166 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 8167 { .vendor = PCI_VENDOR_ID_IBM, \ 8168 .bios = TPACPI_MATCH_ANY, \ 8169 .ec = TPID(__id1, __id2), \ 8170 .quirks = __quirks } 8171 8172 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 8173 { .vendor = PCI_VENDOR_ID_LENOVO, \ 8174 .bios = TPACPI_MATCH_ANY, \ 8175 .ec = TPID(__id1, __id2), \ 8176 .quirks = __quirks } 8177 8178 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8179 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 8180 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 8181 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 8182 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 8183 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 8184 }; 8185 8186 #undef TPACPI_FAN_QL 8187 #undef TPACPI_FAN_QI 8188 8189 static int __init fan_init(struct ibm_init_struct *iibm) 8190 { 8191 int rc; 8192 unsigned long quirks; 8193 8194 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8195 "initializing fan subdriver\n"); 8196 8197 mutex_init(&fan_mutex); 8198 fan_status_access_mode = TPACPI_FAN_NONE; 8199 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8200 fan_control_commands = 0; 8201 fan_watchdog_maxinterval = 0; 8202 tp_features.fan_ctrl_status_undef = 0; 8203 tp_features.second_fan = 0; 8204 fan_control_desired_level = 7; 8205 8206 if (tpacpi_is_ibm()) { 8207 TPACPI_ACPIHANDLE_INIT(fans); 8208 TPACPI_ACPIHANDLE_INIT(gfan); 8209 TPACPI_ACPIHANDLE_INIT(sfan); 8210 } 8211 8212 quirks = tpacpi_check_quirks(fan_quirk_table, 8213 ARRAY_SIZE(fan_quirk_table)); 8214 8215 if (gfan_handle) { 8216 /* 570, 600e/x, 770e, 770x */ 8217 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8218 } else { 8219 /* all other ThinkPads: note that even old-style 8220 * ThinkPad ECs supports the fan control register */ 8221 if (likely(acpi_ec_read(fan_status_offset, 8222 &fan_control_initial_status))) { 8223 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8224 if (quirks & TPACPI_FAN_Q1) 8225 fan_quirk1_setup(); 8226 if (quirks & TPACPI_FAN_2FAN) { 8227 tp_features.second_fan = 1; 8228 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8229 "secondary fan support enabled\n"); 8230 } 8231 } else { 8232 pr_err("ThinkPad ACPI EC access misbehaving, " 8233 "fan status and control unavailable\n"); 8234 return 1; 8235 } 8236 } 8237 8238 if (sfan_handle) { 8239 /* 570, 770x-JL */ 8240 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8241 fan_control_commands |= 8242 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8243 } else { 8244 if (!gfan_handle) { 8245 /* gfan without sfan means no fan control */ 8246 /* all other models implement TP EC 0x2f control */ 8247 8248 if (fans_handle) { 8249 /* X31, X40, X41 */ 8250 fan_control_access_mode = 8251 TPACPI_FAN_WR_ACPI_FANS; 8252 fan_control_commands |= 8253 TPACPI_FAN_CMD_SPEED | 8254 TPACPI_FAN_CMD_LEVEL | 8255 TPACPI_FAN_CMD_ENABLE; 8256 } else { 8257 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8258 fan_control_commands |= 8259 TPACPI_FAN_CMD_LEVEL | 8260 TPACPI_FAN_CMD_ENABLE; 8261 } 8262 } 8263 } 8264 8265 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8266 "fan is %s, modes %d, %d\n", 8267 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8268 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8269 fan_status_access_mode, fan_control_access_mode); 8270 8271 /* fan control master switch */ 8272 if (!fan_control_allowed) { 8273 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8274 fan_control_commands = 0; 8275 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8276 "fan control features disabled by parameter\n"); 8277 } 8278 8279 /* update fan_control_desired_level */ 8280 if (fan_status_access_mode != TPACPI_FAN_NONE) 8281 fan_get_status_safe(NULL); 8282 8283 if (fan_status_access_mode != TPACPI_FAN_NONE || 8284 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8285 if (tp_features.second_fan) { 8286 /* attach second fan tachometer */ 8287 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8288 &dev_attr_fan_fan2_input.attr; 8289 } 8290 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8291 &fan_attr_group); 8292 if (rc < 0) 8293 return rc; 8294 8295 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8296 &driver_attr_fan_watchdog); 8297 if (rc < 0) { 8298 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8299 &fan_attr_group); 8300 return rc; 8301 } 8302 return 0; 8303 } else 8304 return 1; 8305 } 8306 8307 static void fan_exit(void) 8308 { 8309 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8310 "cancelling any pending fan watchdog tasks\n"); 8311 8312 /* FIXME: can we really do this unconditionally? */ 8313 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8314 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8315 &driver_attr_fan_watchdog); 8316 8317 cancel_delayed_work(&fan_watchdog_task); 8318 flush_workqueue(tpacpi_wq); 8319 } 8320 8321 static void fan_suspend(void) 8322 { 8323 int rc; 8324 8325 if (!fan_control_allowed) 8326 return; 8327 8328 /* Store fan status in cache */ 8329 fan_control_resume_level = 0; 8330 rc = fan_get_status_safe(&fan_control_resume_level); 8331 if (rc < 0) 8332 pr_notice("failed to read fan level for later " 8333 "restore during resume: %d\n", rc); 8334 8335 /* if it is undefined, don't attempt to restore it. 8336 * KEEP THIS LAST */ 8337 if (tp_features.fan_ctrl_status_undef) 8338 fan_control_resume_level = 0; 8339 } 8340 8341 static void fan_resume(void) 8342 { 8343 u8 current_level = 7; 8344 bool do_set = false; 8345 int rc; 8346 8347 /* DSDT *always* updates status on resume */ 8348 tp_features.fan_ctrl_status_undef = 0; 8349 8350 if (!fan_control_allowed || 8351 !fan_control_resume_level || 8352 (fan_get_status_safe(¤t_level) < 0)) 8353 return; 8354 8355 switch (fan_control_access_mode) { 8356 case TPACPI_FAN_WR_ACPI_SFAN: 8357 /* never decrease fan level */ 8358 do_set = (fan_control_resume_level > current_level); 8359 break; 8360 case TPACPI_FAN_WR_ACPI_FANS: 8361 case TPACPI_FAN_WR_TPEC: 8362 /* never decrease fan level, scale is: 8363 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8364 * 8365 * We expect the firmware to set either 7 or AUTO, but we 8366 * handle FULLSPEED out of paranoia. 8367 * 8368 * So, we can safely only restore FULLSPEED or 7, anything 8369 * else could slow the fan. Restoring AUTO is useless, at 8370 * best that's exactly what the DSDT already set (it is the 8371 * slower it uses). 8372 * 8373 * Always keep in mind that the DSDT *will* have set the 8374 * fans to what the vendor supposes is the best level. We 8375 * muck with it only to speed the fan up. 8376 */ 8377 if (fan_control_resume_level != 7 && 8378 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8379 return; 8380 else 8381 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8382 (current_level != fan_control_resume_level); 8383 break; 8384 default: 8385 return; 8386 } 8387 if (do_set) { 8388 pr_notice("restoring fan level to 0x%02x\n", 8389 fan_control_resume_level); 8390 rc = fan_set_level_safe(fan_control_resume_level); 8391 if (rc < 0) 8392 pr_notice("failed to restore fan level: %d\n", rc); 8393 } 8394 } 8395 8396 static int fan_read(struct seq_file *m) 8397 { 8398 int rc; 8399 u8 status; 8400 unsigned int speed = 0; 8401 8402 switch (fan_status_access_mode) { 8403 case TPACPI_FAN_RD_ACPI_GFAN: 8404 /* 570, 600e/x, 770e, 770x */ 8405 rc = fan_get_status_safe(&status); 8406 if (rc < 0) 8407 return rc; 8408 8409 seq_printf(m, "status:\t\t%s\n" 8410 "level:\t\t%d\n", 8411 (status != 0) ? "enabled" : "disabled", status); 8412 break; 8413 8414 case TPACPI_FAN_RD_TPEC: 8415 /* all except 570, 600e/x, 770e, 770x */ 8416 rc = fan_get_status_safe(&status); 8417 if (rc < 0) 8418 return rc; 8419 8420 seq_printf(m, "status:\t\t%s\n", 8421 (status != 0) ? "enabled" : "disabled"); 8422 8423 rc = fan_get_speed(&speed); 8424 if (rc < 0) 8425 return rc; 8426 8427 seq_printf(m, "speed:\t\t%d\n", speed); 8428 8429 if (status & TP_EC_FAN_FULLSPEED) 8430 /* Disengaged mode takes precedence */ 8431 seq_printf(m, "level:\t\tdisengaged\n"); 8432 else if (status & TP_EC_FAN_AUTO) 8433 seq_printf(m, "level:\t\tauto\n"); 8434 else 8435 seq_printf(m, "level:\t\t%d\n", status); 8436 break; 8437 8438 case TPACPI_FAN_NONE: 8439 default: 8440 seq_printf(m, "status:\t\tnot supported\n"); 8441 } 8442 8443 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8444 seq_printf(m, "commands:\tlevel <level>"); 8445 8446 switch (fan_control_access_mode) { 8447 case TPACPI_FAN_WR_ACPI_SFAN: 8448 seq_printf(m, " (<level> is 0-7)\n"); 8449 break; 8450 8451 default: 8452 seq_printf(m, " (<level> is 0-7, " 8453 "auto, disengaged, full-speed)\n"); 8454 break; 8455 } 8456 } 8457 8458 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8459 seq_printf(m, "commands:\tenable, disable\n" 8460 "commands:\twatchdog <timeout> (<timeout> " 8461 "is 0 (off), 1-120 (seconds))\n"); 8462 8463 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8464 seq_printf(m, "commands:\tspeed <speed>" 8465 " (<speed> is 0-65535)\n"); 8466 8467 return 0; 8468 } 8469 8470 static int fan_write_cmd_level(const char *cmd, int *rc) 8471 { 8472 int level; 8473 8474 if (strlencmp(cmd, "level auto") == 0) 8475 level = TP_EC_FAN_AUTO; 8476 else if ((strlencmp(cmd, "level disengaged") == 0) | 8477 (strlencmp(cmd, "level full-speed") == 0)) 8478 level = TP_EC_FAN_FULLSPEED; 8479 else if (sscanf(cmd, "level %d", &level) != 1) 8480 return 0; 8481 8482 *rc = fan_set_level_safe(level); 8483 if (*rc == -ENXIO) 8484 pr_err("level command accepted for unsupported access mode %d\n", 8485 fan_control_access_mode); 8486 else if (!*rc) 8487 tpacpi_disclose_usertask("procfs fan", 8488 "set level to %d\n", level); 8489 8490 return 1; 8491 } 8492 8493 static int fan_write_cmd_enable(const char *cmd, int *rc) 8494 { 8495 if (strlencmp(cmd, "enable") != 0) 8496 return 0; 8497 8498 *rc = fan_set_enable(); 8499 if (*rc == -ENXIO) 8500 pr_err("enable command accepted for unsupported access mode %d\n", 8501 fan_control_access_mode); 8502 else if (!*rc) 8503 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8504 8505 return 1; 8506 } 8507 8508 static int fan_write_cmd_disable(const char *cmd, int *rc) 8509 { 8510 if (strlencmp(cmd, "disable") != 0) 8511 return 0; 8512 8513 *rc = fan_set_disable(); 8514 if (*rc == -ENXIO) 8515 pr_err("disable command accepted for unsupported access mode %d\n", 8516 fan_control_access_mode); 8517 else if (!*rc) 8518 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8519 8520 return 1; 8521 } 8522 8523 static int fan_write_cmd_speed(const char *cmd, int *rc) 8524 { 8525 int speed; 8526 8527 /* TODO: 8528 * Support speed <low> <medium> <high> ? */ 8529 8530 if (sscanf(cmd, "speed %d", &speed) != 1) 8531 return 0; 8532 8533 *rc = fan_set_speed(speed); 8534 if (*rc == -ENXIO) 8535 pr_err("speed command accepted for unsupported access mode %d\n", 8536 fan_control_access_mode); 8537 else if (!*rc) 8538 tpacpi_disclose_usertask("procfs fan", 8539 "set speed to %d\n", speed); 8540 8541 return 1; 8542 } 8543 8544 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8545 { 8546 int interval; 8547 8548 if (sscanf(cmd, "watchdog %d", &interval) != 1) 8549 return 0; 8550 8551 if (interval < 0 || interval > 120) 8552 *rc = -EINVAL; 8553 else { 8554 fan_watchdog_maxinterval = interval; 8555 tpacpi_disclose_usertask("procfs fan", 8556 "set watchdog timer to %d\n", 8557 interval); 8558 } 8559 8560 return 1; 8561 } 8562 8563 static int fan_write(char *buf) 8564 { 8565 char *cmd; 8566 int rc = 0; 8567 8568 while (!rc && (cmd = next_cmd(&buf))) { 8569 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 8570 fan_write_cmd_level(cmd, &rc)) && 8571 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 8572 (fan_write_cmd_enable(cmd, &rc) || 8573 fan_write_cmd_disable(cmd, &rc) || 8574 fan_write_cmd_watchdog(cmd, &rc))) && 8575 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 8576 fan_write_cmd_speed(cmd, &rc)) 8577 ) 8578 rc = -EINVAL; 8579 else if (!rc) 8580 fan_watchdog_reset(); 8581 } 8582 8583 return rc; 8584 } 8585 8586 static struct ibm_struct fan_driver_data = { 8587 .name = "fan", 8588 .read = fan_read, 8589 .write = fan_write, 8590 .exit = fan_exit, 8591 .suspend = fan_suspend, 8592 .resume = fan_resume, 8593 }; 8594 8595 /************************************************************************* 8596 * Mute LED subdriver 8597 */ 8598 8599 8600 struct tp_led_table { 8601 acpi_string name; 8602 int on_value; 8603 int off_value; 8604 int state; 8605 }; 8606 8607 static struct tp_led_table led_tables[] = { 8608 [TPACPI_LED_MUTE] = { 8609 .name = "SSMS", 8610 .on_value = 1, 8611 .off_value = 0, 8612 }, 8613 [TPACPI_LED_MICMUTE] = { 8614 .name = "MMTS", 8615 .on_value = 2, 8616 .off_value = 0, 8617 }, 8618 }; 8619 8620 static int mute_led_on_off(struct tp_led_table *t, bool state) 8621 { 8622 acpi_handle temp; 8623 int output; 8624 8625 if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) { 8626 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 8627 return -EIO; 8628 } 8629 8630 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 8631 state ? t->on_value : t->off_value)) 8632 return -EIO; 8633 8634 t->state = state; 8635 return state; 8636 } 8637 8638 int tpacpi_led_set(int whichled, bool on) 8639 { 8640 struct tp_led_table *t; 8641 8642 if (whichled < 0 || whichled >= TPACPI_LED_MAX) 8643 return -EINVAL; 8644 8645 t = &led_tables[whichled]; 8646 if (t->state < 0 || t->state == on) 8647 return t->state; 8648 return mute_led_on_off(t, on); 8649 } 8650 EXPORT_SYMBOL_GPL(tpacpi_led_set); 8651 8652 static int mute_led_init(struct ibm_init_struct *iibm) 8653 { 8654 acpi_handle temp; 8655 int i; 8656 8657 for (i = 0; i < TPACPI_LED_MAX; i++) { 8658 struct tp_led_table *t = &led_tables[i]; 8659 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) 8660 mute_led_on_off(t, false); 8661 else 8662 t->state = -ENODEV; 8663 } 8664 return 0; 8665 } 8666 8667 static void mute_led_exit(void) 8668 { 8669 int i; 8670 8671 for (i = 0; i < TPACPI_LED_MAX; i++) 8672 tpacpi_led_set(i, false); 8673 } 8674 8675 static void mute_led_resume(void) 8676 { 8677 int i; 8678 8679 for (i = 0; i < TPACPI_LED_MAX; i++) { 8680 struct tp_led_table *t = &led_tables[i]; 8681 if (t->state >= 0) 8682 mute_led_on_off(t, t->state); 8683 } 8684 } 8685 8686 static struct ibm_struct mute_led_driver_data = { 8687 .name = "mute_led", 8688 .exit = mute_led_exit, 8689 .resume = mute_led_resume, 8690 }; 8691 8692 /**************************************************************************** 8693 **************************************************************************** 8694 * 8695 * Infrastructure 8696 * 8697 **************************************************************************** 8698 ****************************************************************************/ 8699 8700 /* 8701 * HKEY event callout for other subdrivers go here 8702 * (yes, it is ugly, but it is quick, safe, and gets the job done 8703 */ 8704 static void tpacpi_driver_event(const unsigned int hkey_event) 8705 { 8706 if (ibm_backlight_device) { 8707 switch (hkey_event) { 8708 case TP_HKEY_EV_BRGHT_UP: 8709 case TP_HKEY_EV_BRGHT_DOWN: 8710 tpacpi_brightness_notify_change(); 8711 } 8712 } 8713 if (alsa_card) { 8714 switch (hkey_event) { 8715 case TP_HKEY_EV_VOL_UP: 8716 case TP_HKEY_EV_VOL_DOWN: 8717 case TP_HKEY_EV_VOL_MUTE: 8718 volume_alsa_notify_change(); 8719 } 8720 } 8721 } 8722 8723 static void hotkey_driver_event(const unsigned int scancode) 8724 { 8725 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 8726 } 8727 8728 /* sysfs name ---------------------------------------------------------- */ 8729 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 8730 struct device_attribute *attr, 8731 char *buf) 8732 { 8733 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 8734 } 8735 8736 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name = 8737 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 8738 8739 /* --------------------------------------------------------------------- */ 8740 8741 /* /proc support */ 8742 static struct proc_dir_entry *proc_dir; 8743 8744 /* 8745 * Module and infrastructure proble, init and exit handling 8746 */ 8747 8748 static bool force_load; 8749 8750 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 8751 static const char * __init str_supported(int is_supported) 8752 { 8753 static char text_unsupported[] __initdata = "not supported"; 8754 8755 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 8756 } 8757 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 8758 8759 static void ibm_exit(struct ibm_struct *ibm) 8760 { 8761 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 8762 8763 list_del_init(&ibm->all_drivers); 8764 8765 if (ibm->flags.acpi_notify_installed) { 8766 dbg_printk(TPACPI_DBG_EXIT, 8767 "%s: acpi_remove_notify_handler\n", ibm->name); 8768 BUG_ON(!ibm->acpi); 8769 acpi_remove_notify_handler(*ibm->acpi->handle, 8770 ibm->acpi->type, 8771 dispatch_acpi_notify); 8772 ibm->flags.acpi_notify_installed = 0; 8773 } 8774 8775 if (ibm->flags.proc_created) { 8776 dbg_printk(TPACPI_DBG_EXIT, 8777 "%s: remove_proc_entry\n", ibm->name); 8778 remove_proc_entry(ibm->name, proc_dir); 8779 ibm->flags.proc_created = 0; 8780 } 8781 8782 if (ibm->flags.acpi_driver_registered) { 8783 dbg_printk(TPACPI_DBG_EXIT, 8784 "%s: acpi_bus_unregister_driver\n", ibm->name); 8785 BUG_ON(!ibm->acpi); 8786 acpi_bus_unregister_driver(ibm->acpi->driver); 8787 kfree(ibm->acpi->driver); 8788 ibm->acpi->driver = NULL; 8789 ibm->flags.acpi_driver_registered = 0; 8790 } 8791 8792 if (ibm->flags.init_called && ibm->exit) { 8793 ibm->exit(); 8794 ibm->flags.init_called = 0; 8795 } 8796 8797 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 8798 } 8799 8800 static int __init ibm_init(struct ibm_init_struct *iibm) 8801 { 8802 int ret; 8803 struct ibm_struct *ibm = iibm->data; 8804 struct proc_dir_entry *entry; 8805 8806 BUG_ON(ibm == NULL); 8807 8808 INIT_LIST_HEAD(&ibm->all_drivers); 8809 8810 if (ibm->flags.experimental && !experimental) 8811 return 0; 8812 8813 dbg_printk(TPACPI_DBG_INIT, 8814 "probing for %s\n", ibm->name); 8815 8816 if (iibm->init) { 8817 ret = iibm->init(iibm); 8818 if (ret > 0) 8819 return 0; /* probe failed */ 8820 if (ret) 8821 return ret; 8822 8823 ibm->flags.init_called = 1; 8824 } 8825 8826 if (ibm->acpi) { 8827 if (ibm->acpi->hid) { 8828 ret = register_tpacpi_subdriver(ibm); 8829 if (ret) 8830 goto err_out; 8831 } 8832 8833 if (ibm->acpi->notify) { 8834 ret = setup_acpi_notify(ibm); 8835 if (ret == -ENODEV) { 8836 pr_notice("disabling subdriver %s\n", 8837 ibm->name); 8838 ret = 0; 8839 goto err_out; 8840 } 8841 if (ret < 0) 8842 goto err_out; 8843 } 8844 } 8845 8846 dbg_printk(TPACPI_DBG_INIT, 8847 "%s installed\n", ibm->name); 8848 8849 if (ibm->read) { 8850 umode_t mode = iibm->base_procfs_mode; 8851 8852 if (!mode) 8853 mode = S_IRUGO; 8854 if (ibm->write) 8855 mode |= S_IWUSR; 8856 entry = proc_create_data(ibm->name, mode, proc_dir, 8857 &dispatch_proc_fops, ibm); 8858 if (!entry) { 8859 pr_err("unable to create proc entry %s\n", ibm->name); 8860 ret = -ENODEV; 8861 goto err_out; 8862 } 8863 ibm->flags.proc_created = 1; 8864 } 8865 8866 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 8867 8868 return 0; 8869 8870 err_out: 8871 dbg_printk(TPACPI_DBG_INIT, 8872 "%s: at error exit path with result %d\n", 8873 ibm->name, ret); 8874 8875 ibm_exit(ibm); 8876 return (ret < 0) ? ret : 0; 8877 } 8878 8879 /* Probing */ 8880 8881 static bool __pure __init tpacpi_is_fw_digit(const char c) 8882 { 8883 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 8884 } 8885 8886 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */ 8887 static bool __pure __init tpacpi_is_valid_fw_id(const char * const s, 8888 const char t) 8889 { 8890 return s && strlen(s) >= 8 && 8891 tpacpi_is_fw_digit(s[0]) && 8892 tpacpi_is_fw_digit(s[1]) && 8893 s[2] == t && 8894 (s[3] == 'T' || s[3] == 'N') && 8895 tpacpi_is_fw_digit(s[4]) && 8896 tpacpi_is_fw_digit(s[5]); 8897 } 8898 8899 /* returns 0 - probe ok, or < 0 - probe error. 8900 * Probe ok doesn't mean thinkpad found. 8901 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 8902 static int __must_check __init get_thinkpad_model_data( 8903 struct thinkpad_id_data *tp) 8904 { 8905 const struct dmi_device *dev = NULL; 8906 char ec_fw_string[18]; 8907 char const *s; 8908 8909 if (!tp) 8910 return -EINVAL; 8911 8912 memset(tp, 0, sizeof(*tp)); 8913 8914 if (dmi_name_in_vendors("IBM")) 8915 tp->vendor = PCI_VENDOR_ID_IBM; 8916 else if (dmi_name_in_vendors("LENOVO")) 8917 tp->vendor = PCI_VENDOR_ID_LENOVO; 8918 else 8919 return 0; 8920 8921 s = dmi_get_system_info(DMI_BIOS_VERSION); 8922 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 8923 if (s && !tp->bios_version_str) 8924 return -ENOMEM; 8925 8926 /* Really ancient ThinkPad 240X will fail this, which is fine */ 8927 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') || 8928 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C'))) 8929 return 0; 8930 8931 tp->bios_model = tp->bios_version_str[0] 8932 | (tp->bios_version_str[1] << 8); 8933 tp->bios_release = (tp->bios_version_str[4] << 8) 8934 | tp->bios_version_str[5]; 8935 8936 /* 8937 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 8938 * X32 or newer, all Z series; Some models must have an 8939 * up-to-date BIOS or they will not be detected. 8940 * 8941 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 8942 */ 8943 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 8944 if (sscanf(dev->name, 8945 "IBM ThinkPad Embedded Controller -[%17c", 8946 ec_fw_string) == 1) { 8947 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 8948 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 8949 8950 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 8951 if (!tp->ec_version_str) 8952 return -ENOMEM; 8953 8954 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 8955 tp->ec_model = ec_fw_string[0] 8956 | (ec_fw_string[1] << 8); 8957 tp->ec_release = (ec_fw_string[4] << 8) 8958 | ec_fw_string[5]; 8959 } else { 8960 pr_notice("ThinkPad firmware release %s " 8961 "doesn't match the known patterns\n", 8962 ec_fw_string); 8963 pr_notice("please report this to %s\n", 8964 TPACPI_MAIL); 8965 } 8966 break; 8967 } 8968 } 8969 8970 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 8971 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 8972 tp->model_str = kstrdup(s, GFP_KERNEL); 8973 if (!tp->model_str) 8974 return -ENOMEM; 8975 } else { 8976 s = dmi_get_system_info(DMI_BIOS_VENDOR); 8977 if (s && !(strncasecmp(s, "Lenovo", 6))) { 8978 tp->model_str = kstrdup(s, GFP_KERNEL); 8979 if (!tp->model_str) 8980 return -ENOMEM; 8981 } 8982 } 8983 8984 s = dmi_get_system_info(DMI_PRODUCT_NAME); 8985 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 8986 if (s && !tp->nummodel_str) 8987 return -ENOMEM; 8988 8989 return 0; 8990 } 8991 8992 static int __init probe_for_thinkpad(void) 8993 { 8994 int is_thinkpad; 8995 8996 if (acpi_disabled) 8997 return -ENODEV; 8998 8999 /* It would be dangerous to run the driver in this case */ 9000 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 9001 return -ENODEV; 9002 9003 /* 9004 * Non-ancient models have better DMI tagging, but very old models 9005 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 9006 */ 9007 is_thinkpad = (thinkpad_id.model_str != NULL) || 9008 (thinkpad_id.ec_model != 0) || 9009 tpacpi_is_fw_known(); 9010 9011 /* The EC handler is required */ 9012 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 9013 if (!ec_handle) { 9014 if (is_thinkpad) 9015 pr_err("Not yet supported ThinkPad detected!\n"); 9016 return -ENODEV; 9017 } 9018 9019 if (!is_thinkpad && !force_load) 9020 return -ENODEV; 9021 9022 return 0; 9023 } 9024 9025 static void __init thinkpad_acpi_init_banner(void) 9026 { 9027 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 9028 pr_info("%s\n", TPACPI_URL); 9029 9030 pr_info("ThinkPad BIOS %s, EC %s\n", 9031 (thinkpad_id.bios_version_str) ? 9032 thinkpad_id.bios_version_str : "unknown", 9033 (thinkpad_id.ec_version_str) ? 9034 thinkpad_id.ec_version_str : "unknown"); 9035 9036 BUG_ON(!thinkpad_id.vendor); 9037 9038 if (thinkpad_id.model_str) 9039 pr_info("%s %s, model %s\n", 9040 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 9041 "IBM" : ((thinkpad_id.vendor == 9042 PCI_VENDOR_ID_LENOVO) ? 9043 "Lenovo" : "Unknown vendor"), 9044 thinkpad_id.model_str, 9045 (thinkpad_id.nummodel_str) ? 9046 thinkpad_id.nummodel_str : "unknown"); 9047 } 9048 9049 /* Module init, exit, parameters */ 9050 9051 static struct ibm_init_struct ibms_init[] __initdata = { 9052 { 9053 .data = &thinkpad_acpi_driver_data, 9054 }, 9055 { 9056 .init = hotkey_init, 9057 .data = &hotkey_driver_data, 9058 }, 9059 { 9060 .init = bluetooth_init, 9061 .data = &bluetooth_driver_data, 9062 }, 9063 { 9064 .init = wan_init, 9065 .data = &wan_driver_data, 9066 }, 9067 { 9068 .init = uwb_init, 9069 .data = &uwb_driver_data, 9070 }, 9071 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 9072 { 9073 .init = video_init, 9074 .base_procfs_mode = S_IRUSR, 9075 .data = &video_driver_data, 9076 }, 9077 #endif 9078 { 9079 .init = light_init, 9080 .data = &light_driver_data, 9081 }, 9082 { 9083 .init = cmos_init, 9084 .data = &cmos_driver_data, 9085 }, 9086 { 9087 .init = led_init, 9088 .data = &led_driver_data, 9089 }, 9090 { 9091 .init = beep_init, 9092 .data = &beep_driver_data, 9093 }, 9094 { 9095 .init = thermal_init, 9096 .data = &thermal_driver_data, 9097 }, 9098 { 9099 .init = brightness_init, 9100 .data = &brightness_driver_data, 9101 }, 9102 { 9103 .init = volume_init, 9104 .data = &volume_driver_data, 9105 }, 9106 { 9107 .init = fan_init, 9108 .data = &fan_driver_data, 9109 }, 9110 { 9111 .init = mute_led_init, 9112 .data = &mute_led_driver_data, 9113 }, 9114 }; 9115 9116 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 9117 { 9118 unsigned int i; 9119 struct ibm_struct *ibm; 9120 9121 if (!kp || !kp->name || !val) 9122 return -EINVAL; 9123 9124 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9125 ibm = ibms_init[i].data; 9126 WARN_ON(ibm == NULL); 9127 9128 if (!ibm || !ibm->name) 9129 continue; 9130 9131 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 9132 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 9133 return -ENOSPC; 9134 strcpy(ibms_init[i].param, val); 9135 strcat(ibms_init[i].param, ","); 9136 return 0; 9137 } 9138 } 9139 9140 return -EINVAL; 9141 } 9142 9143 module_param(experimental, int, 0444); 9144 MODULE_PARM_DESC(experimental, 9145 "Enables experimental features when non-zero"); 9146 9147 module_param_named(debug, dbg_level, uint, 0); 9148 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 9149 9150 module_param(force_load, bool, 0444); 9151 MODULE_PARM_DESC(force_load, 9152 "Attempts to load the driver even on a " 9153 "mis-identified ThinkPad when true"); 9154 9155 module_param_named(fan_control, fan_control_allowed, bool, 0444); 9156 MODULE_PARM_DESC(fan_control, 9157 "Enables setting fan parameters features when true"); 9158 9159 module_param_named(brightness_mode, brightness_mode, uint, 0444); 9160 MODULE_PARM_DESC(brightness_mode, 9161 "Selects brightness control strategy: " 9162 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 9163 9164 module_param(brightness_enable, uint, 0444); 9165 MODULE_PARM_DESC(brightness_enable, 9166 "Enables backlight control when 1, disables when 0"); 9167 9168 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 9169 module_param_named(volume_mode, volume_mode, uint, 0444); 9170 MODULE_PARM_DESC(volume_mode, 9171 "Selects volume control strategy: " 9172 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 9173 9174 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 9175 MODULE_PARM_DESC(volume_capabilities, 9176 "Selects the mixer capabilites: " 9177 "0=auto, 1=volume and mute, 2=mute only"); 9178 9179 module_param_named(volume_control, volume_control_allowed, bool, 0444); 9180 MODULE_PARM_DESC(volume_control, 9181 "Enables software override for the console audio " 9182 "control when true"); 9183 9184 module_param_named(software_mute, software_mute_requested, bool, 0444); 9185 MODULE_PARM_DESC(software_mute, 9186 "Request full software mute control"); 9187 9188 /* ALSA module API parameters */ 9189 module_param_named(index, alsa_index, int, 0444); 9190 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 9191 module_param_named(id, alsa_id, charp, 0444); 9192 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 9193 module_param_named(enable, alsa_enable, bool, 0444); 9194 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 9195 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 9196 9197 #define TPACPI_PARAM(feature) \ 9198 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 9199 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 9200 "at module load, see documentation") 9201 9202 TPACPI_PARAM(hotkey); 9203 TPACPI_PARAM(bluetooth); 9204 TPACPI_PARAM(video); 9205 TPACPI_PARAM(light); 9206 TPACPI_PARAM(cmos); 9207 TPACPI_PARAM(led); 9208 TPACPI_PARAM(beep); 9209 TPACPI_PARAM(brightness); 9210 TPACPI_PARAM(volume); 9211 TPACPI_PARAM(fan); 9212 9213 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 9214 module_param(dbg_wlswemul, uint, 0444); 9215 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 9216 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 9217 MODULE_PARM_DESC(wlsw_state, 9218 "Initial state of the emulated WLSW switch"); 9219 9220 module_param(dbg_bluetoothemul, uint, 0444); 9221 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 9222 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 9223 MODULE_PARM_DESC(bluetooth_state, 9224 "Initial state of the emulated bluetooth switch"); 9225 9226 module_param(dbg_wwanemul, uint, 0444); 9227 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 9228 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 9229 MODULE_PARM_DESC(wwan_state, 9230 "Initial state of the emulated WWAN switch"); 9231 9232 module_param(dbg_uwbemul, uint, 0444); 9233 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 9234 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 9235 MODULE_PARM_DESC(uwb_state, 9236 "Initial state of the emulated UWB switch"); 9237 #endif 9238 9239 static void thinkpad_acpi_module_exit(void) 9240 { 9241 struct ibm_struct *ibm, *itmp; 9242 9243 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 9244 9245 list_for_each_entry_safe_reverse(ibm, itmp, 9246 &tpacpi_all_drivers, 9247 all_drivers) { 9248 ibm_exit(ibm); 9249 } 9250 9251 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 9252 9253 if (tpacpi_inputdev) { 9254 if (tp_features.input_device_registered) 9255 input_unregister_device(tpacpi_inputdev); 9256 else 9257 input_free_device(tpacpi_inputdev); 9258 kfree(hotkey_keycode_map); 9259 } 9260 9261 if (tpacpi_hwmon) 9262 hwmon_device_unregister(tpacpi_hwmon); 9263 9264 if (tp_features.sensors_pdev_attrs_registered) 9265 device_remove_file(&tpacpi_sensors_pdev->dev, 9266 &dev_attr_thinkpad_acpi_pdev_name); 9267 if (tpacpi_sensors_pdev) 9268 platform_device_unregister(tpacpi_sensors_pdev); 9269 if (tpacpi_pdev) 9270 platform_device_unregister(tpacpi_pdev); 9271 9272 if (tp_features.sensors_pdrv_attrs_registered) 9273 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 9274 if (tp_features.platform_drv_attrs_registered) 9275 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 9276 9277 if (tp_features.sensors_pdrv_registered) 9278 platform_driver_unregister(&tpacpi_hwmon_pdriver); 9279 9280 if (tp_features.platform_drv_registered) 9281 platform_driver_unregister(&tpacpi_pdriver); 9282 9283 if (proc_dir) 9284 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 9285 9286 if (tpacpi_wq) 9287 destroy_workqueue(tpacpi_wq); 9288 9289 kfree(thinkpad_id.bios_version_str); 9290 kfree(thinkpad_id.ec_version_str); 9291 kfree(thinkpad_id.model_str); 9292 kfree(thinkpad_id.nummodel_str); 9293 } 9294 9295 9296 static int __init thinkpad_acpi_module_init(void) 9297 { 9298 int ret, i; 9299 9300 tpacpi_lifecycle = TPACPI_LIFE_INIT; 9301 9302 /* Driver-level probe */ 9303 9304 ret = get_thinkpad_model_data(&thinkpad_id); 9305 if (ret) { 9306 pr_err("unable to get DMI data: %d\n", ret); 9307 thinkpad_acpi_module_exit(); 9308 return ret; 9309 } 9310 ret = probe_for_thinkpad(); 9311 if (ret) { 9312 thinkpad_acpi_module_exit(); 9313 return ret; 9314 } 9315 9316 /* Driver initialization */ 9317 9318 thinkpad_acpi_init_banner(); 9319 tpacpi_check_outdated_fw(); 9320 9321 TPACPI_ACPIHANDLE_INIT(ecrd); 9322 TPACPI_ACPIHANDLE_INIT(ecwr); 9323 9324 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 9325 if (!tpacpi_wq) { 9326 thinkpad_acpi_module_exit(); 9327 return -ENOMEM; 9328 } 9329 9330 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 9331 if (!proc_dir) { 9332 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 9333 thinkpad_acpi_module_exit(); 9334 return -ENODEV; 9335 } 9336 9337 ret = platform_driver_register(&tpacpi_pdriver); 9338 if (ret) { 9339 pr_err("unable to register main platform driver\n"); 9340 thinkpad_acpi_module_exit(); 9341 return ret; 9342 } 9343 tp_features.platform_drv_registered = 1; 9344 9345 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 9346 if (ret) { 9347 pr_err("unable to register hwmon platform driver\n"); 9348 thinkpad_acpi_module_exit(); 9349 return ret; 9350 } 9351 tp_features.sensors_pdrv_registered = 1; 9352 9353 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 9354 if (!ret) { 9355 tp_features.platform_drv_attrs_registered = 1; 9356 ret = tpacpi_create_driver_attributes( 9357 &tpacpi_hwmon_pdriver.driver); 9358 } 9359 if (ret) { 9360 pr_err("unable to create sysfs driver attributes\n"); 9361 thinkpad_acpi_module_exit(); 9362 return ret; 9363 } 9364 tp_features.sensors_pdrv_attrs_registered = 1; 9365 9366 9367 /* Device initialization */ 9368 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9369 NULL, 0); 9370 if (IS_ERR(tpacpi_pdev)) { 9371 ret = PTR_ERR(tpacpi_pdev); 9372 tpacpi_pdev = NULL; 9373 pr_err("unable to register platform device\n"); 9374 thinkpad_acpi_module_exit(); 9375 return ret; 9376 } 9377 tpacpi_sensors_pdev = platform_device_register_simple( 9378 TPACPI_HWMON_DRVR_NAME, 9379 -1, NULL, 0); 9380 if (IS_ERR(tpacpi_sensors_pdev)) { 9381 ret = PTR_ERR(tpacpi_sensors_pdev); 9382 tpacpi_sensors_pdev = NULL; 9383 pr_err("unable to register hwmon platform device\n"); 9384 thinkpad_acpi_module_exit(); 9385 return ret; 9386 } 9387 ret = device_create_file(&tpacpi_sensors_pdev->dev, 9388 &dev_attr_thinkpad_acpi_pdev_name); 9389 if (ret) { 9390 pr_err("unable to create sysfs hwmon device attributes\n"); 9391 thinkpad_acpi_module_exit(); 9392 return ret; 9393 } 9394 tp_features.sensors_pdev_attrs_registered = 1; 9395 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9396 if (IS_ERR(tpacpi_hwmon)) { 9397 ret = PTR_ERR(tpacpi_hwmon); 9398 tpacpi_hwmon = NULL; 9399 pr_err("unable to register hwmon device\n"); 9400 thinkpad_acpi_module_exit(); 9401 return ret; 9402 } 9403 mutex_init(&tpacpi_inputdev_send_mutex); 9404 tpacpi_inputdev = input_allocate_device(); 9405 if (!tpacpi_inputdev) { 9406 thinkpad_acpi_module_exit(); 9407 return -ENOMEM; 9408 } else { 9409 /* Prepare input device, but don't register */ 9410 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9411 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9412 tpacpi_inputdev->id.bustype = BUS_HOST; 9413 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9414 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9415 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9416 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9417 } 9418 9419 /* Init subdriver dependencies */ 9420 tpacpi_detect_brightness_capabilities(); 9421 9422 /* Init subdrivers */ 9423 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9424 ret = ibm_init(&ibms_init[i]); 9425 if (ret >= 0 && *ibms_init[i].param) 9426 ret = ibms_init[i].data->write(ibms_init[i].param); 9427 if (ret < 0) { 9428 thinkpad_acpi_module_exit(); 9429 return ret; 9430 } 9431 } 9432 9433 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9434 9435 ret = input_register_device(tpacpi_inputdev); 9436 if (ret < 0) { 9437 pr_err("unable to register input device\n"); 9438 thinkpad_acpi_module_exit(); 9439 return ret; 9440 } else { 9441 tp_features.input_device_registered = 1; 9442 } 9443 9444 return 0; 9445 } 9446 9447 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9448 9449 /* 9450 * This will autoload the driver in almost every ThinkPad 9451 * in widespread use. 9452 * 9453 * Only _VERY_ old models, like the 240, 240x and 570 lack 9454 * the HKEY event interface. 9455 */ 9456 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9457 9458 /* 9459 * DMI matching for module autoloading 9460 * 9461 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9462 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9463 * 9464 * Only models listed in thinkwiki will be supported, so add yours 9465 * if it is not there yet. 9466 */ 9467 #define IBM_BIOS_MODULE_ALIAS(__type) \ 9468 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9469 9470 /* Ancient thinkpad BIOSes have to be identified by 9471 * BIOS type or model number, and there are far less 9472 * BIOS types than model numbers... */ 9473 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9474 9475 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9476 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9477 MODULE_DESCRIPTION(TPACPI_DESC); 9478 MODULE_VERSION(TPACPI_VERSION); 9479 MODULE_LICENSE("GPL"); 9480 9481 module_init(thinkpad_acpi_module_init); 9482 module_exit(thinkpad_acpi_module_exit); 9483