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 "0.24" 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 65 #include <linux/nvram.h> 66 #include <linux/proc_fs.h> 67 #include <linux/seq_file.h> 68 #include <linux/sysfs.h> 69 #include <linux/backlight.h> 70 #include <linux/fb.h> 71 #include <linux/platform_device.h> 72 #include <linux/hwmon.h> 73 #include <linux/hwmon-sysfs.h> 74 #include <linux/input.h> 75 #include <linux/leds.h> 76 #include <linux/rfkill.h> 77 #include <asm/uaccess.h> 78 79 #include <linux/dmi.h> 80 #include <linux/jiffies.h> 81 #include <linux/workqueue.h> 82 83 #include <sound/core.h> 84 #include <sound/control.h> 85 #include <sound/initval.h> 86 87 #include <acpi/acpi_drivers.h> 88 89 #include <linux/pci_ids.h> 90 91 92 /* ThinkPad CMOS commands */ 93 #define TP_CMOS_VOLUME_DOWN 0 94 #define TP_CMOS_VOLUME_UP 1 95 #define TP_CMOS_VOLUME_MUTE 2 96 #define TP_CMOS_BRIGHTNESS_UP 4 97 #define TP_CMOS_BRIGHTNESS_DOWN 5 98 #define TP_CMOS_THINKLIGHT_ON 12 99 #define TP_CMOS_THINKLIGHT_OFF 13 100 101 /* NVRAM Addresses */ 102 enum tp_nvram_addr { 103 TP_NVRAM_ADDR_HK2 = 0x57, 104 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 105 TP_NVRAM_ADDR_VIDEO = 0x59, 106 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 107 TP_NVRAM_ADDR_MIXER = 0x60, 108 }; 109 110 /* NVRAM bit masks */ 111 enum { 112 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 113 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 114 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 115 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 116 TP_NVRAM_MASK_THINKLIGHT = 0x10, 117 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 118 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 119 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 120 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 121 TP_NVRAM_MASK_MUTE = 0x40, 122 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 123 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 124 TP_NVRAM_POS_LEVEL_VOLUME = 0, 125 }; 126 127 /* Misc NVRAM-related */ 128 enum { 129 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 130 }; 131 132 /* ACPI HIDs */ 133 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 134 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 135 #define TPACPI_ACPI_EC_HID "PNP0C09" 136 137 /* Input IDs */ 138 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 139 #define TPACPI_HKEY_INPUT_VERSION 0x4101 140 141 /* ACPI \WGSV commands */ 142 enum { 143 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 144 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 145 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 146 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 147 }; 148 149 /* TP_ACPI_WGSV_GET_STATE bits */ 150 enum { 151 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 152 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 153 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 154 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 155 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 156 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 157 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 158 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 159 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 160 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 161 }; 162 163 /* HKEY events */ 164 enum tpacpi_hkey_event_t { 165 /* Hotkey-related */ 166 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 167 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 168 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 169 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 170 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 171 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 172 173 /* Reasons for waking up from S3/S4 */ 174 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 175 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 176 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 177 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 178 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 179 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 180 181 /* Auto-sleep after eject request */ 182 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 183 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 184 185 /* Misc bay events */ 186 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 187 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 188 or port replicator */ 189 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 190 dock or port replicator */ 191 192 /* User-interface events */ 193 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 194 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 195 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 196 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 197 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 198 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 199 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 200 201 /* Key-related user-interface events */ 202 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 203 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 204 205 /* Thermal events */ 206 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 207 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 208 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 209 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 210 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 211 212 /* AC-related events */ 213 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 214 215 /* Misc */ 216 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 217 }; 218 219 /**************************************************************************** 220 * Main driver 221 */ 222 223 #define TPACPI_NAME "thinkpad" 224 #define TPACPI_DESC "ThinkPad ACPI Extras" 225 #define TPACPI_FILE TPACPI_NAME "_acpi" 226 #define TPACPI_URL "http://ibm-acpi.sf.net/" 227 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 228 229 #define TPACPI_PROC_DIR "ibm" 230 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 231 #define TPACPI_DRVR_NAME TPACPI_FILE 232 #define TPACPI_DRVR_SHORTNAME "tpacpi" 233 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 234 235 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 236 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 237 238 #define TPACPI_MAX_ACPI_ARGS 3 239 240 /* Debugging printk groups */ 241 #define TPACPI_DBG_ALL 0xffff 242 #define TPACPI_DBG_DISCLOSETASK 0x8000 243 #define TPACPI_DBG_INIT 0x0001 244 #define TPACPI_DBG_EXIT 0x0002 245 #define TPACPI_DBG_RFKILL 0x0004 246 #define TPACPI_DBG_HKEY 0x0008 247 #define TPACPI_DBG_FAN 0x0010 248 #define TPACPI_DBG_BRGHT 0x0020 249 #define TPACPI_DBG_MIXER 0x0040 250 251 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 252 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 253 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 254 255 256 /**************************************************************************** 257 * Driver-wide structs and misc. variables 258 */ 259 260 struct ibm_struct; 261 262 struct tp_acpi_drv_struct { 263 const struct acpi_device_id *hid; 264 struct acpi_driver *driver; 265 266 void (*notify) (struct ibm_struct *, u32); 267 acpi_handle *handle; 268 u32 type; 269 struct acpi_device *device; 270 }; 271 272 struct ibm_struct { 273 char *name; 274 275 int (*read) (struct seq_file *); 276 int (*write) (char *); 277 void (*exit) (void); 278 void (*resume) (void); 279 void (*suspend) (void); 280 void (*shutdown) (void); 281 282 struct list_head all_drivers; 283 284 struct tp_acpi_drv_struct *acpi; 285 286 struct { 287 u8 acpi_driver_registered:1; 288 u8 acpi_notify_installed:1; 289 u8 proc_created:1; 290 u8 init_called:1; 291 u8 experimental:1; 292 } flags; 293 }; 294 295 struct ibm_init_struct { 296 char param[32]; 297 298 int (*init) (struct ibm_init_struct *); 299 umode_t base_procfs_mode; 300 struct ibm_struct *data; 301 }; 302 303 static struct { 304 u32 bluetooth:1; 305 u32 hotkey:1; 306 u32 hotkey_mask:1; 307 u32 hotkey_wlsw:1; 308 u32 hotkey_tablet:1; 309 u32 light:1; 310 u32 light_status:1; 311 u32 bright_acpimode:1; 312 u32 bright_unkfw:1; 313 u32 wan:1; 314 u32 uwb:1; 315 u32 fan_ctrl_status_undef:1; 316 u32 second_fan:1; 317 u32 beep_needs_two_args:1; 318 u32 mixer_no_level_control:1; 319 u32 input_device_registered:1; 320 u32 platform_drv_registered:1; 321 u32 platform_drv_attrs_registered:1; 322 u32 sensors_pdrv_registered:1; 323 u32 sensors_pdrv_attrs_registered:1; 324 u32 sensors_pdev_attrs_registered:1; 325 u32 hotkey_poll_active:1; 326 } tp_features; 327 328 static struct { 329 u16 hotkey_mask_ff:1; 330 u16 volume_ctrl_forbidden:1; 331 } tp_warned; 332 333 struct thinkpad_id_data { 334 unsigned int vendor; /* ThinkPad vendor: 335 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 336 337 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 338 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 339 340 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 341 u16 ec_model; 342 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 343 u16 ec_release; 344 345 char *model_str; /* ThinkPad T43 */ 346 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 347 }; 348 static struct thinkpad_id_data thinkpad_id; 349 350 static enum { 351 TPACPI_LIFE_INIT = 0, 352 TPACPI_LIFE_RUNNING, 353 TPACPI_LIFE_EXITING, 354 } tpacpi_lifecycle; 355 356 static int experimental; 357 static u32 dbg_level; 358 359 static struct workqueue_struct *tpacpi_wq; 360 361 enum led_status_t { 362 TPACPI_LED_OFF = 0, 363 TPACPI_LED_ON, 364 TPACPI_LED_BLINK, 365 }; 366 367 /* Special LED class that can defer work */ 368 struct tpacpi_led_classdev { 369 struct led_classdev led_classdev; 370 struct work_struct work; 371 enum led_status_t new_state; 372 unsigned int led; 373 }; 374 375 /* brightness level capabilities */ 376 static unsigned int bright_maxlvl; /* 0 = unknown */ 377 378 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 379 static int dbg_wlswemul; 380 static bool tpacpi_wlsw_emulstate; 381 static int dbg_bluetoothemul; 382 static bool tpacpi_bluetooth_emulstate; 383 static int dbg_wwanemul; 384 static bool tpacpi_wwan_emulstate; 385 static int dbg_uwbemul; 386 static bool tpacpi_uwb_emulstate; 387 #endif 388 389 390 /************************************************************************* 391 * Debugging helpers 392 */ 393 394 #define dbg_printk(a_dbg_level, format, arg...) \ 395 do { \ 396 if (dbg_level & (a_dbg_level)) \ 397 printk(KERN_DEBUG pr_fmt("%s: " format), \ 398 __func__, ##arg); \ 399 } while (0) 400 401 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 402 #define vdbg_printk dbg_printk 403 static const char *str_supported(int is_supported); 404 #else 405 static inline const char *str_supported(int is_supported) { return ""; } 406 #define vdbg_printk(a_dbg_level, format, arg...) \ 407 no_printk(format, ##arg) 408 #endif 409 410 static void tpacpi_log_usertask(const char * const what) 411 { 412 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 413 what, task_tgid_vnr(current)); 414 } 415 416 #define tpacpi_disclose_usertask(what, format, arg...) \ 417 do { \ 418 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 419 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 420 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 421 what, task_tgid_vnr(current), ## arg); \ 422 } \ 423 } while (0) 424 425 /* 426 * Quirk handling helpers 427 * 428 * ThinkPad IDs and versions seen in the field so far 429 * are two-characters from the set [0-9A-Z], i.e. base 36. 430 * 431 * We use values well outside that range as specials. 432 */ 433 434 #define TPACPI_MATCH_ANY 0xffffU 435 #define TPACPI_MATCH_UNKNOWN 0U 436 437 /* TPID('1', 'Y') == 0x5931 */ 438 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 439 440 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 441 { .vendor = PCI_VENDOR_ID_IBM, \ 442 .bios = TPID(__id1, __id2), \ 443 .ec = TPACPI_MATCH_ANY, \ 444 .quirks = (__quirk) } 445 446 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 447 { .vendor = PCI_VENDOR_ID_LENOVO, \ 448 .bios = TPID(__id1, __id2), \ 449 .ec = TPACPI_MATCH_ANY, \ 450 .quirks = (__quirk) } 451 452 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 453 { .vendor = PCI_VENDOR_ID_LENOVO, \ 454 .bios = TPACPI_MATCH_ANY, \ 455 .ec = TPID(__id1, __id2), \ 456 .quirks = (__quirk) } 457 458 struct tpacpi_quirk { 459 unsigned int vendor; 460 u16 bios; 461 u16 ec; 462 unsigned long quirks; 463 }; 464 465 /** 466 * tpacpi_check_quirks() - search BIOS/EC version on a list 467 * @qlist: array of &struct tpacpi_quirk 468 * @qlist_size: number of elements in @qlist 469 * 470 * Iterates over a quirks list until one is found that matches the 471 * ThinkPad's vendor, BIOS and EC model. 472 * 473 * Returns 0 if nothing matches, otherwise returns the quirks field of 474 * the matching &struct tpacpi_quirk entry. 475 * 476 * The match criteria is: vendor, ec and bios much match. 477 */ 478 static unsigned long __init tpacpi_check_quirks( 479 const struct tpacpi_quirk *qlist, 480 unsigned int qlist_size) 481 { 482 while (qlist_size) { 483 if ((qlist->vendor == thinkpad_id.vendor || 484 qlist->vendor == TPACPI_MATCH_ANY) && 485 (qlist->bios == thinkpad_id.bios_model || 486 qlist->bios == TPACPI_MATCH_ANY) && 487 (qlist->ec == thinkpad_id.ec_model || 488 qlist->ec == TPACPI_MATCH_ANY)) 489 return qlist->quirks; 490 491 qlist_size--; 492 qlist++; 493 } 494 return 0; 495 } 496 497 static inline bool __pure __init tpacpi_is_lenovo(void) 498 { 499 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 500 } 501 502 static inline bool __pure __init tpacpi_is_ibm(void) 503 { 504 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 505 } 506 507 /**************************************************************************** 508 **************************************************************************** 509 * 510 * ACPI Helpers and device model 511 * 512 **************************************************************************** 513 ****************************************************************************/ 514 515 /************************************************************************* 516 * ACPI basic handles 517 */ 518 519 static acpi_handle root_handle; 520 static acpi_handle ec_handle; 521 522 #define TPACPI_HANDLE(object, parent, paths...) \ 523 static acpi_handle object##_handle; \ 524 static const acpi_handle * const object##_parent __initconst = \ 525 &parent##_handle; \ 526 static char *object##_paths[] __initdata = { paths } 527 528 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 529 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 530 531 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 532 /* T4x, X31, X40 */ 533 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 534 "\\CMS", /* R40, R40e */ 535 ); /* all others */ 536 537 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 538 "^HKEY", /* R30, R31 */ 539 "HKEY", /* all others */ 540 ); /* 570 */ 541 542 /************************************************************************* 543 * ACPI helpers 544 */ 545 546 static int acpi_evalf(acpi_handle handle, 547 int *res, char *method, char *fmt, ...) 548 { 549 char *fmt0 = fmt; 550 struct acpi_object_list params; 551 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 552 struct acpi_buffer result, *resultp; 553 union acpi_object out_obj; 554 acpi_status status; 555 va_list ap; 556 char res_type; 557 int success; 558 int quiet; 559 560 if (!*fmt) { 561 pr_err("acpi_evalf() called with empty format\n"); 562 return 0; 563 } 564 565 if (*fmt == 'q') { 566 quiet = 1; 567 fmt++; 568 } else 569 quiet = 0; 570 571 res_type = *(fmt++); 572 573 params.count = 0; 574 params.pointer = &in_objs[0]; 575 576 va_start(ap, fmt); 577 while (*fmt) { 578 char c = *(fmt++); 579 switch (c) { 580 case 'd': /* int */ 581 in_objs[params.count].integer.value = va_arg(ap, int); 582 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 583 break; 584 /* add more types as needed */ 585 default: 586 pr_err("acpi_evalf() called " 587 "with invalid format character '%c'\n", c); 588 va_end(ap); 589 return 0; 590 } 591 } 592 va_end(ap); 593 594 if (res_type != 'v') { 595 result.length = sizeof(out_obj); 596 result.pointer = &out_obj; 597 resultp = &result; 598 } else 599 resultp = NULL; 600 601 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 602 603 switch (res_type) { 604 case 'd': /* int */ 605 success = (status == AE_OK && 606 out_obj.type == ACPI_TYPE_INTEGER); 607 if (success && res) 608 *res = out_obj.integer.value; 609 break; 610 case 'v': /* void */ 611 success = status == AE_OK; 612 break; 613 /* add more types as needed */ 614 default: 615 pr_err("acpi_evalf() called " 616 "with invalid format character '%c'\n", res_type); 617 return 0; 618 } 619 620 if (!success && !quiet) 621 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 622 method, fmt0, acpi_format_exception(status)); 623 624 return success; 625 } 626 627 static int acpi_ec_read(int i, u8 *p) 628 { 629 int v; 630 631 if (ecrd_handle) { 632 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 633 return 0; 634 *p = v; 635 } else { 636 if (ec_read(i, p) < 0) 637 return 0; 638 } 639 640 return 1; 641 } 642 643 static int acpi_ec_write(int i, u8 v) 644 { 645 if (ecwr_handle) { 646 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 647 return 0; 648 } else { 649 if (ec_write(i, v) < 0) 650 return 0; 651 } 652 653 return 1; 654 } 655 656 static int issue_thinkpad_cmos_command(int cmos_cmd) 657 { 658 if (!cmos_handle) 659 return -ENXIO; 660 661 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 662 return -EIO; 663 664 return 0; 665 } 666 667 /************************************************************************* 668 * ACPI device model 669 */ 670 671 #define TPACPI_ACPIHANDLE_INIT(object) \ 672 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 673 object##_paths, ARRAY_SIZE(object##_paths)) 674 675 static void __init drv_acpi_handle_init(const char *name, 676 acpi_handle *handle, const acpi_handle parent, 677 char **paths, const int num_paths) 678 { 679 int i; 680 acpi_status status; 681 682 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 683 name); 684 685 for (i = 0; i < num_paths; i++) { 686 status = acpi_get_handle(parent, paths[i], handle); 687 if (ACPI_SUCCESS(status)) { 688 dbg_printk(TPACPI_DBG_INIT, 689 "Found ACPI handle %s for %s\n", 690 paths[i], name); 691 return; 692 } 693 } 694 695 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 696 name); 697 *handle = NULL; 698 } 699 700 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 701 u32 level, void *context, void **return_value) 702 { 703 *(acpi_handle *)return_value = handle; 704 705 return AE_CTRL_TERMINATE; 706 } 707 708 static void __init tpacpi_acpi_handle_locate(const char *name, 709 const char *hid, 710 acpi_handle *handle) 711 { 712 acpi_status status; 713 acpi_handle device_found; 714 715 BUG_ON(!name || !hid || !handle); 716 vdbg_printk(TPACPI_DBG_INIT, 717 "trying to locate ACPI handle for %s, using HID %s\n", 718 name, hid); 719 720 memset(&device_found, 0, sizeof(device_found)); 721 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 722 (void *)name, &device_found); 723 724 *handle = NULL; 725 726 if (ACPI_SUCCESS(status)) { 727 *handle = device_found; 728 dbg_printk(TPACPI_DBG_INIT, 729 "Found ACPI handle for %s\n", name); 730 } else { 731 vdbg_printk(TPACPI_DBG_INIT, 732 "Could not locate an ACPI handle for %s: %s\n", 733 name, acpi_format_exception(status)); 734 } 735 } 736 737 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 738 { 739 struct ibm_struct *ibm = data; 740 741 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 742 return; 743 744 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 745 return; 746 747 ibm->acpi->notify(ibm, event); 748 } 749 750 static int __init setup_acpi_notify(struct ibm_struct *ibm) 751 { 752 acpi_status status; 753 int rc; 754 755 BUG_ON(!ibm->acpi); 756 757 if (!*ibm->acpi->handle) 758 return 0; 759 760 vdbg_printk(TPACPI_DBG_INIT, 761 "setting up ACPI notify for %s\n", ibm->name); 762 763 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 764 if (rc < 0) { 765 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 766 return -ENODEV; 767 } 768 769 ibm->acpi->device->driver_data = ibm; 770 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 771 TPACPI_ACPI_EVENT_PREFIX, 772 ibm->name); 773 774 status = acpi_install_notify_handler(*ibm->acpi->handle, 775 ibm->acpi->type, dispatch_acpi_notify, ibm); 776 if (ACPI_FAILURE(status)) { 777 if (status == AE_ALREADY_EXISTS) { 778 pr_notice("another device driver is already " 779 "handling %s events\n", ibm->name); 780 } else { 781 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 782 ibm->name, acpi_format_exception(status)); 783 } 784 return -ENODEV; 785 } 786 ibm->flags.acpi_notify_installed = 1; 787 return 0; 788 } 789 790 static int __init tpacpi_device_add(struct acpi_device *device) 791 { 792 return 0; 793 } 794 795 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 796 { 797 int rc; 798 799 dbg_printk(TPACPI_DBG_INIT, 800 "registering %s as an ACPI driver\n", ibm->name); 801 802 BUG_ON(!ibm->acpi); 803 804 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 805 if (!ibm->acpi->driver) { 806 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 807 return -ENOMEM; 808 } 809 810 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 811 ibm->acpi->driver->ids = ibm->acpi->hid; 812 813 ibm->acpi->driver->ops.add = &tpacpi_device_add; 814 815 rc = acpi_bus_register_driver(ibm->acpi->driver); 816 if (rc < 0) { 817 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 818 ibm->name, rc); 819 kfree(ibm->acpi->driver); 820 ibm->acpi->driver = NULL; 821 } else if (!rc) 822 ibm->flags.acpi_driver_registered = 1; 823 824 return rc; 825 } 826 827 828 /**************************************************************************** 829 **************************************************************************** 830 * 831 * Procfs Helpers 832 * 833 **************************************************************************** 834 ****************************************************************************/ 835 836 static int dispatch_proc_show(struct seq_file *m, void *v) 837 { 838 struct ibm_struct *ibm = m->private; 839 840 if (!ibm || !ibm->read) 841 return -EINVAL; 842 return ibm->read(m); 843 } 844 845 static int dispatch_proc_open(struct inode *inode, struct file *file) 846 { 847 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 848 } 849 850 static ssize_t dispatch_proc_write(struct file *file, 851 const char __user *userbuf, 852 size_t count, loff_t *pos) 853 { 854 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 855 char *kernbuf; 856 int ret; 857 858 if (!ibm || !ibm->write) 859 return -EINVAL; 860 if (count > PAGE_SIZE - 2) 861 return -EINVAL; 862 863 kernbuf = kmalloc(count + 2, GFP_KERNEL); 864 if (!kernbuf) 865 return -ENOMEM; 866 867 if (copy_from_user(kernbuf, userbuf, count)) { 868 kfree(kernbuf); 869 return -EFAULT; 870 } 871 872 kernbuf[count] = 0; 873 strcat(kernbuf, ","); 874 ret = ibm->write(kernbuf); 875 if (ret == 0) 876 ret = count; 877 878 kfree(kernbuf); 879 880 return ret; 881 } 882 883 static const struct file_operations dispatch_proc_fops = { 884 .owner = THIS_MODULE, 885 .open = dispatch_proc_open, 886 .read = seq_read, 887 .llseek = seq_lseek, 888 .release = single_release, 889 .write = dispatch_proc_write, 890 }; 891 892 static char *next_cmd(char **cmds) 893 { 894 char *start = *cmds; 895 char *end; 896 897 while ((end = strchr(start, ',')) && end == start) 898 start = end + 1; 899 900 if (!end) 901 return NULL; 902 903 *end = 0; 904 *cmds = end + 1; 905 return start; 906 } 907 908 909 /**************************************************************************** 910 **************************************************************************** 911 * 912 * Device model: input, hwmon and platform 913 * 914 **************************************************************************** 915 ****************************************************************************/ 916 917 static struct platform_device *tpacpi_pdev; 918 static struct platform_device *tpacpi_sensors_pdev; 919 static struct device *tpacpi_hwmon; 920 static struct input_dev *tpacpi_inputdev; 921 static struct mutex tpacpi_inputdev_send_mutex; 922 static LIST_HEAD(tpacpi_all_drivers); 923 924 #ifdef CONFIG_PM_SLEEP 925 static int tpacpi_suspend_handler(struct device *dev) 926 { 927 struct ibm_struct *ibm, *itmp; 928 929 list_for_each_entry_safe(ibm, itmp, 930 &tpacpi_all_drivers, 931 all_drivers) { 932 if (ibm->suspend) 933 (ibm->suspend)(); 934 } 935 936 return 0; 937 } 938 939 static int tpacpi_resume_handler(struct device *dev) 940 { 941 struct ibm_struct *ibm, *itmp; 942 943 list_for_each_entry_safe(ibm, itmp, 944 &tpacpi_all_drivers, 945 all_drivers) { 946 if (ibm->resume) 947 (ibm->resume)(); 948 } 949 950 return 0; 951 } 952 #endif 953 954 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 955 tpacpi_suspend_handler, tpacpi_resume_handler); 956 957 static void tpacpi_shutdown_handler(struct platform_device *pdev) 958 { 959 struct ibm_struct *ibm, *itmp; 960 961 list_for_each_entry_safe(ibm, itmp, 962 &tpacpi_all_drivers, 963 all_drivers) { 964 if (ibm->shutdown) 965 (ibm->shutdown)(); 966 } 967 } 968 969 static struct platform_driver tpacpi_pdriver = { 970 .driver = { 971 .name = TPACPI_DRVR_NAME, 972 .owner = THIS_MODULE, 973 .pm = &tpacpi_pm, 974 }, 975 .shutdown = tpacpi_shutdown_handler, 976 }; 977 978 static struct platform_driver tpacpi_hwmon_pdriver = { 979 .driver = { 980 .name = TPACPI_HWMON_DRVR_NAME, 981 .owner = THIS_MODULE, 982 }, 983 }; 984 985 /************************************************************************* 986 * sysfs support helpers 987 */ 988 989 struct attribute_set { 990 unsigned int members, max_members; 991 struct attribute_group group; 992 }; 993 994 struct attribute_set_obj { 995 struct attribute_set s; 996 struct attribute *a; 997 } __attribute__((packed)); 998 999 static struct attribute_set *create_attr_set(unsigned int max_members, 1000 const char *name) 1001 { 1002 struct attribute_set_obj *sobj; 1003 1004 if (max_members == 0) 1005 return NULL; 1006 1007 /* Allocates space for implicit NULL at the end too */ 1008 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1009 max_members * sizeof(struct attribute *), 1010 GFP_KERNEL); 1011 if (!sobj) 1012 return NULL; 1013 sobj->s.max_members = max_members; 1014 sobj->s.group.attrs = &sobj->a; 1015 sobj->s.group.name = name; 1016 1017 return &sobj->s; 1018 } 1019 1020 #define destroy_attr_set(_set) \ 1021 kfree(_set); 1022 1023 /* not multi-threaded safe, use it in a single thread per set */ 1024 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1025 { 1026 if (!s || !attr) 1027 return -EINVAL; 1028 1029 if (s->members >= s->max_members) 1030 return -ENOMEM; 1031 1032 s->group.attrs[s->members] = attr; 1033 s->members++; 1034 1035 return 0; 1036 } 1037 1038 static int add_many_to_attr_set(struct attribute_set *s, 1039 struct attribute **attr, 1040 unsigned int count) 1041 { 1042 int i, res; 1043 1044 for (i = 0; i < count; i++) { 1045 res = add_to_attr_set(s, attr[i]); 1046 if (res) 1047 return res; 1048 } 1049 1050 return 0; 1051 } 1052 1053 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1054 { 1055 sysfs_remove_group(kobj, &s->group); 1056 destroy_attr_set(s); 1057 } 1058 1059 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1060 sysfs_create_group(_kobj, &_attr_set->group) 1061 1062 static int parse_strtoul(const char *buf, 1063 unsigned long max, unsigned long *value) 1064 { 1065 char *endp; 1066 1067 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1068 endp = skip_spaces(endp); 1069 if (*endp || *value > max) 1070 return -EINVAL; 1071 1072 return 0; 1073 } 1074 1075 static void tpacpi_disable_brightness_delay(void) 1076 { 1077 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1078 pr_notice("ACPI backlight control delay disabled\n"); 1079 } 1080 1081 static void printk_deprecated_attribute(const char * const what, 1082 const char * const details) 1083 { 1084 tpacpi_log_usertask("deprecated sysfs attribute"); 1085 pr_warn("WARNING: sysfs attribute %s is deprecated and " 1086 "will be removed. %s\n", 1087 what, details); 1088 } 1089 1090 /************************************************************************* 1091 * rfkill and radio control support helpers 1092 */ 1093 1094 /* 1095 * ThinkPad-ACPI firmware handling model: 1096 * 1097 * WLSW (master wireless switch) is event-driven, and is common to all 1098 * firmware-controlled radios. It cannot be controlled, just monitored, 1099 * as expected. It overrides all radio state in firmware 1100 * 1101 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1102 * (TODO: verify how WLSW interacts with the returned radio state). 1103 * 1104 * The only time there are shadow radio state changes, is when 1105 * masked-off hotkeys are used. 1106 */ 1107 1108 /* 1109 * Internal driver API for radio state: 1110 * 1111 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1112 * bool: true means radio blocked (off) 1113 */ 1114 enum tpacpi_rfkill_state { 1115 TPACPI_RFK_RADIO_OFF = 0, 1116 TPACPI_RFK_RADIO_ON 1117 }; 1118 1119 /* rfkill switches */ 1120 enum tpacpi_rfk_id { 1121 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1122 TPACPI_RFK_WWAN_SW_ID, 1123 TPACPI_RFK_UWB_SW_ID, 1124 TPACPI_RFK_SW_MAX 1125 }; 1126 1127 static const char *tpacpi_rfkill_names[] = { 1128 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1129 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1130 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1131 [TPACPI_RFK_SW_MAX] = NULL 1132 }; 1133 1134 /* ThinkPad-ACPI rfkill subdriver */ 1135 struct tpacpi_rfk { 1136 struct rfkill *rfkill; 1137 enum tpacpi_rfk_id id; 1138 const struct tpacpi_rfk_ops *ops; 1139 }; 1140 1141 struct tpacpi_rfk_ops { 1142 /* firmware interface */ 1143 int (*get_status)(void); 1144 int (*set_status)(const enum tpacpi_rfkill_state); 1145 }; 1146 1147 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1148 1149 /* Query FW and update rfkill sw state for a given rfkill switch */ 1150 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1151 { 1152 int status; 1153 1154 if (!tp_rfk) 1155 return -ENODEV; 1156 1157 status = (tp_rfk->ops->get_status)(); 1158 if (status < 0) 1159 return status; 1160 1161 rfkill_set_sw_state(tp_rfk->rfkill, 1162 (status == TPACPI_RFK_RADIO_OFF)); 1163 1164 return status; 1165 } 1166 1167 /* Query FW and update rfkill sw state for all rfkill switches */ 1168 static void tpacpi_rfk_update_swstate_all(void) 1169 { 1170 unsigned int i; 1171 1172 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1173 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1174 } 1175 1176 /* 1177 * Sync the HW-blocking state of all rfkill switches, 1178 * do notice it causes the rfkill core to schedule uevents 1179 */ 1180 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1181 { 1182 unsigned int i; 1183 struct tpacpi_rfk *tp_rfk; 1184 1185 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1186 tp_rfk = tpacpi_rfkill_switches[i]; 1187 if (tp_rfk) { 1188 if (rfkill_set_hw_state(tp_rfk->rfkill, 1189 blocked)) { 1190 /* ignore -- we track sw block */ 1191 } 1192 } 1193 } 1194 } 1195 1196 /* Call to get the WLSW state from the firmware */ 1197 static int hotkey_get_wlsw(void); 1198 1199 /* Call to query WLSW state and update all rfkill switches */ 1200 static bool tpacpi_rfk_check_hwblock_state(void) 1201 { 1202 int res = hotkey_get_wlsw(); 1203 int hw_blocked; 1204 1205 /* When unknown or unsupported, we have to assume it is unblocked */ 1206 if (res < 0) 1207 return false; 1208 1209 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1210 tpacpi_rfk_update_hwblock_state(hw_blocked); 1211 1212 return hw_blocked; 1213 } 1214 1215 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1216 { 1217 struct tpacpi_rfk *tp_rfk = data; 1218 int res; 1219 1220 dbg_printk(TPACPI_DBG_RFKILL, 1221 "request to change radio state to %s\n", 1222 blocked ? "blocked" : "unblocked"); 1223 1224 /* try to set radio state */ 1225 res = (tp_rfk->ops->set_status)(blocked ? 1226 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1227 1228 /* and update the rfkill core with whatever the FW really did */ 1229 tpacpi_rfk_update_swstate(tp_rfk); 1230 1231 return (res < 0) ? res : 0; 1232 } 1233 1234 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1235 .set_block = tpacpi_rfk_hook_set_block, 1236 }; 1237 1238 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1239 const struct tpacpi_rfk_ops *tp_rfkops, 1240 const enum rfkill_type rfktype, 1241 const char *name, 1242 const bool set_default) 1243 { 1244 struct tpacpi_rfk *atp_rfk; 1245 int res; 1246 bool sw_state = false; 1247 bool hw_state; 1248 int sw_status; 1249 1250 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1251 1252 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1253 if (atp_rfk) 1254 atp_rfk->rfkill = rfkill_alloc(name, 1255 &tpacpi_pdev->dev, 1256 rfktype, 1257 &tpacpi_rfk_rfkill_ops, 1258 atp_rfk); 1259 if (!atp_rfk || !atp_rfk->rfkill) { 1260 pr_err("failed to allocate memory for rfkill class\n"); 1261 kfree(atp_rfk); 1262 return -ENOMEM; 1263 } 1264 1265 atp_rfk->id = id; 1266 atp_rfk->ops = tp_rfkops; 1267 1268 sw_status = (tp_rfkops->get_status)(); 1269 if (sw_status < 0) { 1270 pr_err("failed to read initial state for %s, error %d\n", 1271 name, sw_status); 1272 } else { 1273 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1274 if (set_default) { 1275 /* try to keep the initial state, since we ask the 1276 * firmware to preserve it across S5 in NVRAM */ 1277 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1278 } 1279 } 1280 hw_state = tpacpi_rfk_check_hwblock_state(); 1281 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1282 1283 res = rfkill_register(atp_rfk->rfkill); 1284 if (res < 0) { 1285 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1286 rfkill_destroy(atp_rfk->rfkill); 1287 kfree(atp_rfk); 1288 return res; 1289 } 1290 1291 tpacpi_rfkill_switches[id] = atp_rfk; 1292 1293 pr_info("rfkill switch %s: radio is %sblocked\n", 1294 name, (sw_state || hw_state) ? "" : "un"); 1295 return 0; 1296 } 1297 1298 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1299 { 1300 struct tpacpi_rfk *tp_rfk; 1301 1302 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1303 1304 tp_rfk = tpacpi_rfkill_switches[id]; 1305 if (tp_rfk) { 1306 rfkill_unregister(tp_rfk->rfkill); 1307 rfkill_destroy(tp_rfk->rfkill); 1308 tpacpi_rfkill_switches[id] = NULL; 1309 kfree(tp_rfk); 1310 } 1311 } 1312 1313 static void printk_deprecated_rfkill_attribute(const char * const what) 1314 { 1315 printk_deprecated_attribute(what, 1316 "Please switch to generic rfkill before year 2010"); 1317 } 1318 1319 /* sysfs <radio> enable ------------------------------------------------ */ 1320 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1321 struct device_attribute *attr, 1322 char *buf) 1323 { 1324 int status; 1325 1326 printk_deprecated_rfkill_attribute(attr->attr.name); 1327 1328 /* This is in the ABI... */ 1329 if (tpacpi_rfk_check_hwblock_state()) { 1330 status = TPACPI_RFK_RADIO_OFF; 1331 } else { 1332 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1333 if (status < 0) 1334 return status; 1335 } 1336 1337 return snprintf(buf, PAGE_SIZE, "%d\n", 1338 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1339 } 1340 1341 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1342 struct device_attribute *attr, 1343 const char *buf, size_t count) 1344 { 1345 unsigned long t; 1346 int res; 1347 1348 printk_deprecated_rfkill_attribute(attr->attr.name); 1349 1350 if (parse_strtoul(buf, 1, &t)) 1351 return -EINVAL; 1352 1353 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1354 1355 /* This is in the ABI... */ 1356 if (tpacpi_rfk_check_hwblock_state() && !!t) 1357 return -EPERM; 1358 1359 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1360 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1361 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1362 1363 return (res < 0) ? res : count; 1364 } 1365 1366 /* procfs -------------------------------------------------------------- */ 1367 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1368 { 1369 if (id >= TPACPI_RFK_SW_MAX) 1370 seq_printf(m, "status:\t\tnot supported\n"); 1371 else { 1372 int status; 1373 1374 /* This is in the ABI... */ 1375 if (tpacpi_rfk_check_hwblock_state()) { 1376 status = TPACPI_RFK_RADIO_OFF; 1377 } else { 1378 status = tpacpi_rfk_update_swstate( 1379 tpacpi_rfkill_switches[id]); 1380 if (status < 0) 1381 return status; 1382 } 1383 1384 seq_printf(m, "status:\t\t%s\n", 1385 (status == TPACPI_RFK_RADIO_ON) ? 1386 "enabled" : "disabled"); 1387 seq_printf(m, "commands:\tenable, disable\n"); 1388 } 1389 1390 return 0; 1391 } 1392 1393 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1394 { 1395 char *cmd; 1396 int status = -1; 1397 int res = 0; 1398 1399 if (id >= TPACPI_RFK_SW_MAX) 1400 return -ENODEV; 1401 1402 while ((cmd = next_cmd(&buf))) { 1403 if (strlencmp(cmd, "enable") == 0) 1404 status = TPACPI_RFK_RADIO_ON; 1405 else if (strlencmp(cmd, "disable") == 0) 1406 status = TPACPI_RFK_RADIO_OFF; 1407 else 1408 return -EINVAL; 1409 } 1410 1411 if (status != -1) { 1412 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1413 (status == TPACPI_RFK_RADIO_ON) ? 1414 "enable" : "disable", 1415 tpacpi_rfkill_names[id]); 1416 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1417 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1418 } 1419 1420 return res; 1421 } 1422 1423 /************************************************************************* 1424 * thinkpad-acpi driver attributes 1425 */ 1426 1427 /* interface_version --------------------------------------------------- */ 1428 static ssize_t tpacpi_driver_interface_version_show( 1429 struct device_driver *drv, 1430 char *buf) 1431 { 1432 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1433 } 1434 1435 static DRIVER_ATTR(interface_version, S_IRUGO, 1436 tpacpi_driver_interface_version_show, NULL); 1437 1438 /* debug_level --------------------------------------------------------- */ 1439 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1440 char *buf) 1441 { 1442 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1443 } 1444 1445 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1446 const char *buf, size_t count) 1447 { 1448 unsigned long t; 1449 1450 if (parse_strtoul(buf, 0xffff, &t)) 1451 return -EINVAL; 1452 1453 dbg_level = t; 1454 1455 return count; 1456 } 1457 1458 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1459 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1460 1461 /* version ------------------------------------------------------------- */ 1462 static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1463 char *buf) 1464 { 1465 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1466 TPACPI_DESC, TPACPI_VERSION); 1467 } 1468 1469 static DRIVER_ATTR(version, S_IRUGO, 1470 tpacpi_driver_version_show, NULL); 1471 1472 /* --------------------------------------------------------------------- */ 1473 1474 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1475 1476 /* wlsw_emulstate ------------------------------------------------------ */ 1477 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1478 char *buf) 1479 { 1480 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1481 } 1482 1483 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1484 const char *buf, size_t count) 1485 { 1486 unsigned long t; 1487 1488 if (parse_strtoul(buf, 1, &t)) 1489 return -EINVAL; 1490 1491 if (tpacpi_wlsw_emulstate != !!t) { 1492 tpacpi_wlsw_emulstate = !!t; 1493 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1494 } 1495 1496 return count; 1497 } 1498 1499 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1500 tpacpi_driver_wlsw_emulstate_show, 1501 tpacpi_driver_wlsw_emulstate_store); 1502 1503 /* bluetooth_emulstate ------------------------------------------------- */ 1504 static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1505 struct device_driver *drv, 1506 char *buf) 1507 { 1508 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1509 } 1510 1511 static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1512 struct device_driver *drv, 1513 const char *buf, size_t count) 1514 { 1515 unsigned long t; 1516 1517 if (parse_strtoul(buf, 1, &t)) 1518 return -EINVAL; 1519 1520 tpacpi_bluetooth_emulstate = !!t; 1521 1522 return count; 1523 } 1524 1525 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1526 tpacpi_driver_bluetooth_emulstate_show, 1527 tpacpi_driver_bluetooth_emulstate_store); 1528 1529 /* wwan_emulstate ------------------------------------------------- */ 1530 static ssize_t tpacpi_driver_wwan_emulstate_show( 1531 struct device_driver *drv, 1532 char *buf) 1533 { 1534 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1535 } 1536 1537 static ssize_t tpacpi_driver_wwan_emulstate_store( 1538 struct device_driver *drv, 1539 const char *buf, size_t count) 1540 { 1541 unsigned long t; 1542 1543 if (parse_strtoul(buf, 1, &t)) 1544 return -EINVAL; 1545 1546 tpacpi_wwan_emulstate = !!t; 1547 1548 return count; 1549 } 1550 1551 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1552 tpacpi_driver_wwan_emulstate_show, 1553 tpacpi_driver_wwan_emulstate_store); 1554 1555 /* uwb_emulstate ------------------------------------------------- */ 1556 static ssize_t tpacpi_driver_uwb_emulstate_show( 1557 struct device_driver *drv, 1558 char *buf) 1559 { 1560 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1561 } 1562 1563 static ssize_t tpacpi_driver_uwb_emulstate_store( 1564 struct device_driver *drv, 1565 const char *buf, size_t count) 1566 { 1567 unsigned long t; 1568 1569 if (parse_strtoul(buf, 1, &t)) 1570 return -EINVAL; 1571 1572 tpacpi_uwb_emulstate = !!t; 1573 1574 return count; 1575 } 1576 1577 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1578 tpacpi_driver_uwb_emulstate_show, 1579 tpacpi_driver_uwb_emulstate_store); 1580 #endif 1581 1582 /* --------------------------------------------------------------------- */ 1583 1584 static struct driver_attribute *tpacpi_driver_attributes[] = { 1585 &driver_attr_debug_level, &driver_attr_version, 1586 &driver_attr_interface_version, 1587 }; 1588 1589 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1590 { 1591 int i, res; 1592 1593 i = 0; 1594 res = 0; 1595 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1596 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1597 i++; 1598 } 1599 1600 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1601 if (!res && dbg_wlswemul) 1602 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1603 if (!res && dbg_bluetoothemul) 1604 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1605 if (!res && dbg_wwanemul) 1606 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1607 if (!res && dbg_uwbemul) 1608 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1609 #endif 1610 1611 return res; 1612 } 1613 1614 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1615 { 1616 int i; 1617 1618 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1619 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1620 1621 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1622 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1623 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1624 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1625 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1626 #endif 1627 } 1628 1629 /************************************************************************* 1630 * Firmware Data 1631 */ 1632 1633 /* 1634 * Table of recommended minimum BIOS versions 1635 * 1636 * Reasons for listing: 1637 * 1. Stable BIOS, listed because the unknown amount of 1638 * bugs and bad ACPI behaviour on older versions 1639 * 1640 * 2. BIOS or EC fw with known bugs that trigger on Linux 1641 * 1642 * 3. BIOS with known reduced functionality in older versions 1643 * 1644 * We recommend the latest BIOS and EC version. 1645 * We only support the latest BIOS and EC fw version as a rule. 1646 * 1647 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1648 * Information from users in ThinkWiki 1649 * 1650 * WARNING: we use this table also to detect that the machine is 1651 * a ThinkPad in some cases, so don't remove entries lightly. 1652 */ 1653 1654 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1655 { .vendor = (__v), \ 1656 .bios = TPID(__id1, __id2), \ 1657 .ec = TPACPI_MATCH_ANY, \ 1658 .quirks = TPACPI_MATCH_ANY << 16 \ 1659 | (__bv1) << 8 | (__bv2) } 1660 1661 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1662 __eid, __ev1, __ev2) \ 1663 { .vendor = (__v), \ 1664 .bios = TPID(__bid1, __bid2), \ 1665 .ec = __eid, \ 1666 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1667 | (__bv1) << 8 | (__bv2) } 1668 1669 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1670 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1671 1672 /* Outdated IBM BIOSes often lack the EC id string */ 1673 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1674 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1675 __bv1, __bv2, TPID(__id1, __id2), \ 1676 __ev1, __ev2), \ 1677 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1678 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1679 __ev1, __ev2) 1680 1681 /* Outdated IBM BIOSes often lack the EC id string */ 1682 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1683 __eid1, __eid2, __ev1, __ev2) \ 1684 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1685 __bv1, __bv2, TPID(__eid1, __eid2), \ 1686 __ev1, __ev2), \ 1687 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1688 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1689 __ev1, __ev2) 1690 1691 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1692 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1693 1694 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1695 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1696 __bv1, __bv2, TPID(__id1, __id2), \ 1697 __ev1, __ev2) 1698 1699 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1700 __eid1, __eid2, __ev1, __ev2) \ 1701 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1702 __bv1, __bv2, TPID(__eid1, __eid2), \ 1703 __ev1, __ev2) 1704 1705 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1706 /* Numeric models ------------------ */ 1707 /* FW MODEL BIOS VERS */ 1708 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1709 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1710 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1711 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1712 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1713 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1714 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1715 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1716 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1717 1718 /* A-series ------------------------- */ 1719 /* FW MODEL BIOS VERS EC VERS */ 1720 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1721 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1722 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1723 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1724 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1725 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1726 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1727 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1728 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1729 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1730 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1731 1732 /* G-series ------------------------- */ 1733 /* FW MODEL BIOS VERS */ 1734 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1735 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1736 1737 /* R-series, T-series --------------- */ 1738 /* FW MODEL BIOS VERS EC VERS */ 1739 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1740 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1741 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1742 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1743 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1744 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1745 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1746 T40/p, T41/p, T42/p (1) */ 1747 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1748 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1749 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1750 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1751 1752 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1753 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1754 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1755 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1756 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1757 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1758 1759 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1760 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1761 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1762 1763 /* BIOS FW BIOS VERS EC FW EC VERS */ 1764 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1765 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1766 1767 /* X-series ------------------------- */ 1768 /* FW MODEL BIOS VERS EC VERS */ 1769 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1770 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1771 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1772 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1773 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1774 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1775 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1776 1777 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1778 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1779 1780 /* (0) - older versions lack DMI EC fw string and functionality */ 1781 /* (1) - older versions known to lack functionality */ 1782 }; 1783 1784 #undef TPV_QL1 1785 #undef TPV_QL0 1786 #undef TPV_QI2 1787 #undef TPV_QI1 1788 #undef TPV_QI0 1789 #undef TPV_Q_X 1790 #undef TPV_Q 1791 1792 static void __init tpacpi_check_outdated_fw(void) 1793 { 1794 unsigned long fwvers; 1795 u16 ec_version, bios_version; 1796 1797 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1798 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1799 1800 if (!fwvers) 1801 return; 1802 1803 bios_version = fwvers & 0xffffU; 1804 ec_version = (fwvers >> 16) & 0xffffU; 1805 1806 /* note that unknown versions are set to 0x0000 and we use that */ 1807 if ((bios_version > thinkpad_id.bios_release) || 1808 (ec_version > thinkpad_id.ec_release && 1809 ec_version != TPACPI_MATCH_ANY)) { 1810 /* 1811 * The changelogs would let us track down the exact 1812 * reason, but it is just too much of a pain to track 1813 * it. We only list BIOSes that are either really 1814 * broken, or really stable to begin with, so it is 1815 * best if the user upgrades the firmware anyway. 1816 */ 1817 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1818 pr_warn("WARNING: This firmware may be missing critical bug " 1819 "fixes and/or important features\n"); 1820 } 1821 } 1822 1823 static bool __init tpacpi_is_fw_known(void) 1824 { 1825 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1826 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1827 } 1828 1829 /**************************************************************************** 1830 **************************************************************************** 1831 * 1832 * Subdrivers 1833 * 1834 **************************************************************************** 1835 ****************************************************************************/ 1836 1837 /************************************************************************* 1838 * thinkpad-acpi metadata subdriver 1839 */ 1840 1841 static int thinkpad_acpi_driver_read(struct seq_file *m) 1842 { 1843 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1844 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1845 return 0; 1846 } 1847 1848 static struct ibm_struct thinkpad_acpi_driver_data = { 1849 .name = "driver", 1850 .read = thinkpad_acpi_driver_read, 1851 }; 1852 1853 /************************************************************************* 1854 * Hotkey subdriver 1855 */ 1856 1857 /* 1858 * ThinkPad firmware event model 1859 * 1860 * The ThinkPad firmware has two main event interfaces: normal ACPI 1861 * notifications (which follow the ACPI standard), and a private event 1862 * interface. 1863 * 1864 * The private event interface also issues events for the hotkeys. As 1865 * the driver gained features, the event handling code ended up being 1866 * built around the hotkey subdriver. This will need to be refactored 1867 * to a more formal event API eventually. 1868 * 1869 * Some "hotkeys" are actually supposed to be used as event reports, 1870 * such as "brightness has changed", "volume has changed", depending on 1871 * the ThinkPad model and how the firmware is operating. 1872 * 1873 * Unlike other classes, hotkey-class events have mask/unmask control on 1874 * non-ancient firmware. However, how it behaves changes a lot with the 1875 * firmware model and version. 1876 */ 1877 1878 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1879 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1880 TP_ACPI_HOTKEYSCAN_FNF2, 1881 TP_ACPI_HOTKEYSCAN_FNF3, 1882 TP_ACPI_HOTKEYSCAN_FNF4, 1883 TP_ACPI_HOTKEYSCAN_FNF5, 1884 TP_ACPI_HOTKEYSCAN_FNF6, 1885 TP_ACPI_HOTKEYSCAN_FNF7, 1886 TP_ACPI_HOTKEYSCAN_FNF8, 1887 TP_ACPI_HOTKEYSCAN_FNF9, 1888 TP_ACPI_HOTKEYSCAN_FNF10, 1889 TP_ACPI_HOTKEYSCAN_FNF11, 1890 TP_ACPI_HOTKEYSCAN_FNF12, 1891 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1892 TP_ACPI_HOTKEYSCAN_FNINSERT, 1893 TP_ACPI_HOTKEYSCAN_FNDELETE, 1894 TP_ACPI_HOTKEYSCAN_FNHOME, 1895 TP_ACPI_HOTKEYSCAN_FNEND, 1896 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1897 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1898 TP_ACPI_HOTKEYSCAN_FNSPACE, 1899 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1900 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1901 TP_ACPI_HOTKEYSCAN_MUTE, 1902 TP_ACPI_HOTKEYSCAN_THINKPAD, 1903 TP_ACPI_HOTKEYSCAN_UNK1, 1904 TP_ACPI_HOTKEYSCAN_UNK2, 1905 TP_ACPI_HOTKEYSCAN_UNK3, 1906 TP_ACPI_HOTKEYSCAN_UNK4, 1907 TP_ACPI_HOTKEYSCAN_UNK5, 1908 TP_ACPI_HOTKEYSCAN_UNK6, 1909 TP_ACPI_HOTKEYSCAN_UNK7, 1910 TP_ACPI_HOTKEYSCAN_UNK8, 1911 1912 /* Hotkey keymap size */ 1913 TPACPI_HOTKEY_MAP_LEN 1914 }; 1915 1916 enum { /* Keys/events available through NVRAM polling */ 1917 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1918 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1919 }; 1920 1921 enum { /* Positions of some of the keys in hotkey masks */ 1922 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1923 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1924 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1925 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1926 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1927 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1928 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1929 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1930 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1931 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1932 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1933 }; 1934 1935 enum { /* NVRAM to ACPI HKEY group map */ 1936 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1937 TP_ACPI_HKEY_ZOOM_MASK | 1938 TP_ACPI_HKEY_DISPSWTCH_MASK | 1939 TP_ACPI_HKEY_HIBERNATE_MASK, 1940 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1941 TP_ACPI_HKEY_BRGHTDWN_MASK, 1942 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1943 TP_ACPI_HKEY_VOLDWN_MASK | 1944 TP_ACPI_HKEY_MUTE_MASK, 1945 }; 1946 1947 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1948 struct tp_nvram_state { 1949 u16 thinkpad_toggle:1; 1950 u16 zoom_toggle:1; 1951 u16 display_toggle:1; 1952 u16 thinklight_toggle:1; 1953 u16 hibernate_toggle:1; 1954 u16 displayexp_toggle:1; 1955 u16 display_state:1; 1956 u16 brightness_toggle:1; 1957 u16 volume_toggle:1; 1958 u16 mute:1; 1959 1960 u8 brightness_level; 1961 u8 volume_level; 1962 }; 1963 1964 /* kthread for the hotkey poller */ 1965 static struct task_struct *tpacpi_hotkey_task; 1966 1967 /* 1968 * Acquire mutex to write poller control variables as an 1969 * atomic block. 1970 * 1971 * Increment hotkey_config_change when changing them if you 1972 * want the kthread to forget old state. 1973 * 1974 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1975 */ 1976 static struct mutex hotkey_thread_data_mutex; 1977 static unsigned int hotkey_config_change; 1978 1979 /* 1980 * hotkey poller control variables 1981 * 1982 * Must be atomic or readers will also need to acquire mutex 1983 * 1984 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1985 * should be used only when the changes need to be taken as 1986 * a block, OR when one needs to force the kthread to forget 1987 * old state. 1988 */ 1989 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 1990 static unsigned int hotkey_poll_freq = 10; /* Hz */ 1991 1992 #define HOTKEY_CONFIG_CRITICAL_START \ 1993 do { \ 1994 mutex_lock(&hotkey_thread_data_mutex); \ 1995 hotkey_config_change++; \ 1996 } while (0); 1997 #define HOTKEY_CONFIG_CRITICAL_END \ 1998 mutex_unlock(&hotkey_thread_data_mutex); 1999 2000 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2001 2002 #define hotkey_source_mask 0U 2003 #define HOTKEY_CONFIG_CRITICAL_START 2004 #define HOTKEY_CONFIG_CRITICAL_END 2005 2006 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2007 2008 static struct mutex hotkey_mutex; 2009 2010 static enum { /* Reasons for waking up */ 2011 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2012 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2013 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2014 } hotkey_wakeup_reason; 2015 2016 static int hotkey_autosleep_ack; 2017 2018 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2019 static u32 hotkey_all_mask; /* all events supported in fw */ 2020 static u32 hotkey_reserved_mask; /* events better left disabled */ 2021 static u32 hotkey_driver_mask; /* events needed by the driver */ 2022 static u32 hotkey_user_mask; /* events visible to userspace */ 2023 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2024 2025 static unsigned int hotkey_report_mode; 2026 2027 static u16 *hotkey_keycode_map; 2028 2029 static struct attribute_set *hotkey_dev_attributes; 2030 2031 static void tpacpi_driver_event(const unsigned int hkey_event); 2032 static void hotkey_driver_event(const unsigned int scancode); 2033 static void hotkey_poll_setup(const bool may_warn); 2034 2035 /* HKEY.MHKG() return bits */ 2036 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2037 2038 static int hotkey_get_wlsw(void) 2039 { 2040 int status; 2041 2042 if (!tp_features.hotkey_wlsw) 2043 return -ENODEV; 2044 2045 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2046 if (dbg_wlswemul) 2047 return (tpacpi_wlsw_emulstate) ? 2048 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2049 #endif 2050 2051 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2052 return -EIO; 2053 2054 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2055 } 2056 2057 static int hotkey_get_tablet_mode(int *status) 2058 { 2059 int s; 2060 2061 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2062 return -EIO; 2063 2064 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2065 return 0; 2066 } 2067 2068 /* 2069 * Reads current event mask from firmware, and updates 2070 * hotkey_acpi_mask accordingly. Also resets any bits 2071 * from hotkey_user_mask that are unavailable to be 2072 * delivered (shadow requirement of the userspace ABI). 2073 * 2074 * Call with hotkey_mutex held 2075 */ 2076 static int hotkey_mask_get(void) 2077 { 2078 if (tp_features.hotkey_mask) { 2079 u32 m = 0; 2080 2081 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2082 return -EIO; 2083 2084 hotkey_acpi_mask = m; 2085 } else { 2086 /* no mask support doesn't mean no event support... */ 2087 hotkey_acpi_mask = hotkey_all_mask; 2088 } 2089 2090 /* sync userspace-visible mask */ 2091 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2092 2093 return 0; 2094 } 2095 2096 void static hotkey_mask_warn_incomplete_mask(void) 2097 { 2098 /* log only what the user can fix... */ 2099 const u32 wantedmask = hotkey_driver_mask & 2100 ~(hotkey_acpi_mask | hotkey_source_mask) & 2101 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2102 2103 if (wantedmask) 2104 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2105 } 2106 2107 /* 2108 * Set the firmware mask when supported 2109 * 2110 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2111 * 2112 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2113 * 2114 * Call with hotkey_mutex held 2115 */ 2116 static int hotkey_mask_set(u32 mask) 2117 { 2118 int i; 2119 int rc = 0; 2120 2121 const u32 fwmask = mask & ~hotkey_source_mask; 2122 2123 if (tp_features.hotkey_mask) { 2124 for (i = 0; i < 32; i++) { 2125 if (!acpi_evalf(hkey_handle, 2126 NULL, "MHKM", "vdd", i + 1, 2127 !!(mask & (1 << i)))) { 2128 rc = -EIO; 2129 break; 2130 } 2131 } 2132 } 2133 2134 /* 2135 * We *must* make an inconditional call to hotkey_mask_get to 2136 * refresh hotkey_acpi_mask and update hotkey_user_mask 2137 * 2138 * Take the opportunity to also log when we cannot _enable_ 2139 * a given event. 2140 */ 2141 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2142 pr_notice("asked for hotkey mask 0x%08x, but " 2143 "firmware forced it to 0x%08x\n", 2144 fwmask, hotkey_acpi_mask); 2145 } 2146 2147 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2148 hotkey_mask_warn_incomplete_mask(); 2149 2150 return rc; 2151 } 2152 2153 /* 2154 * Sets hotkey_user_mask and tries to set the firmware mask 2155 * 2156 * Call with hotkey_mutex held 2157 */ 2158 static int hotkey_user_mask_set(const u32 mask) 2159 { 2160 int rc; 2161 2162 /* Give people a chance to notice they are doing something that 2163 * is bound to go boom on their users sooner or later */ 2164 if (!tp_warned.hotkey_mask_ff && 2165 (mask == 0xffff || mask == 0xffffff || 2166 mask == 0xffffffff)) { 2167 tp_warned.hotkey_mask_ff = 1; 2168 pr_notice("setting the hotkey mask to 0x%08x is likely " 2169 "not the best way to go about it\n", mask); 2170 pr_notice("please consider using the driver defaults, " 2171 "and refer to up-to-date thinkpad-acpi " 2172 "documentation\n"); 2173 } 2174 2175 /* Try to enable what the user asked for, plus whatever we need. 2176 * this syncs everything but won't enable bits in hotkey_user_mask */ 2177 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2178 2179 /* Enable the available bits in hotkey_user_mask */ 2180 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2181 2182 return rc; 2183 } 2184 2185 /* 2186 * Sets the driver hotkey mask. 2187 * 2188 * Can be called even if the hotkey subdriver is inactive 2189 */ 2190 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2191 { 2192 int rc; 2193 2194 /* Do the right thing if hotkey_init has not been called yet */ 2195 if (!tp_features.hotkey) { 2196 hotkey_driver_mask = mask; 2197 return 0; 2198 } 2199 2200 mutex_lock(&hotkey_mutex); 2201 2202 HOTKEY_CONFIG_CRITICAL_START 2203 hotkey_driver_mask = mask; 2204 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2205 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2206 #endif 2207 HOTKEY_CONFIG_CRITICAL_END 2208 2209 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2210 ~hotkey_source_mask); 2211 hotkey_poll_setup(true); 2212 2213 mutex_unlock(&hotkey_mutex); 2214 2215 return rc; 2216 } 2217 2218 static int hotkey_status_get(int *status) 2219 { 2220 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2221 return -EIO; 2222 2223 return 0; 2224 } 2225 2226 static int hotkey_status_set(bool enable) 2227 { 2228 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2229 return -EIO; 2230 2231 return 0; 2232 } 2233 2234 static void tpacpi_input_send_tabletsw(void) 2235 { 2236 int state; 2237 2238 if (tp_features.hotkey_tablet && 2239 !hotkey_get_tablet_mode(&state)) { 2240 mutex_lock(&tpacpi_inputdev_send_mutex); 2241 2242 input_report_switch(tpacpi_inputdev, 2243 SW_TABLET_MODE, !!state); 2244 input_sync(tpacpi_inputdev); 2245 2246 mutex_unlock(&tpacpi_inputdev_send_mutex); 2247 } 2248 } 2249 2250 /* Do NOT call without validating scancode first */ 2251 static void tpacpi_input_send_key(const unsigned int scancode) 2252 { 2253 const unsigned int keycode = hotkey_keycode_map[scancode]; 2254 2255 if (keycode != KEY_RESERVED) { 2256 mutex_lock(&tpacpi_inputdev_send_mutex); 2257 2258 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2259 input_report_key(tpacpi_inputdev, keycode, 1); 2260 input_sync(tpacpi_inputdev); 2261 2262 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2263 input_report_key(tpacpi_inputdev, keycode, 0); 2264 input_sync(tpacpi_inputdev); 2265 2266 mutex_unlock(&tpacpi_inputdev_send_mutex); 2267 } 2268 } 2269 2270 /* Do NOT call without validating scancode first */ 2271 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2272 { 2273 hotkey_driver_event(scancode); 2274 if (hotkey_user_mask & (1 << scancode)) 2275 tpacpi_input_send_key(scancode); 2276 } 2277 2278 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2279 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2280 2281 /* Do NOT call without validating scancode first */ 2282 static void tpacpi_hotkey_send_key(unsigned int scancode) 2283 { 2284 tpacpi_input_send_key_masked(scancode); 2285 if (hotkey_report_mode < 2) { 2286 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device, 2287 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode); 2288 } 2289 } 2290 2291 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2292 { 2293 u8 d; 2294 2295 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2296 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2297 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2298 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2299 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2300 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2301 } 2302 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2303 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2304 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2305 } 2306 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2307 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2308 n->displayexp_toggle = 2309 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2310 } 2311 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2312 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2313 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2314 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2315 n->brightness_toggle = 2316 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2317 } 2318 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2319 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2320 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2321 >> TP_NVRAM_POS_LEVEL_VOLUME; 2322 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2323 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2324 } 2325 } 2326 2327 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2328 struct tp_nvram_state *newn, 2329 const u32 event_mask) 2330 { 2331 2332 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2333 do { \ 2334 if ((event_mask & (1 << __scancode)) && \ 2335 oldn->__member != newn->__member) \ 2336 tpacpi_hotkey_send_key(__scancode); \ 2337 } while (0) 2338 2339 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2340 do { \ 2341 if (event_mask & (1 << __scancode)) \ 2342 tpacpi_hotkey_send_key(__scancode); \ 2343 } while (0) 2344 2345 void issue_volchange(const unsigned int oldvol, 2346 const unsigned int newvol) 2347 { 2348 unsigned int i = oldvol; 2349 2350 while (i > newvol) { 2351 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2352 i--; 2353 } 2354 while (i < newvol) { 2355 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2356 i++; 2357 } 2358 } 2359 2360 void issue_brightnesschange(const unsigned int oldbrt, 2361 const unsigned int newbrt) 2362 { 2363 unsigned int i = oldbrt; 2364 2365 while (i > newbrt) { 2366 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2367 i--; 2368 } 2369 while (i < newbrt) { 2370 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2371 i++; 2372 } 2373 } 2374 2375 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2376 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2377 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2378 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2379 2380 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2381 2382 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2383 2384 /* 2385 * Handle volume 2386 * 2387 * This code is supposed to duplicate the IBM firmware behaviour: 2388 * - Pressing MUTE issues mute hotkey message, even when already mute 2389 * - Pressing Volume up/down issues volume up/down hotkey messages, 2390 * even when already at maximum or minimum volume 2391 * - The act of unmuting issues volume up/down notification, 2392 * depending which key was used to unmute 2393 * 2394 * We are constrained to what the NVRAM can tell us, which is not much 2395 * and certainly not enough if more than one volume hotkey was pressed 2396 * since the last poll cycle. 2397 * 2398 * Just to make our life interesting, some newer Lenovo ThinkPads have 2399 * bugs in the BIOS and may fail to update volume_toggle properly. 2400 */ 2401 if (newn->mute) { 2402 /* muted */ 2403 if (!oldn->mute || 2404 oldn->volume_toggle != newn->volume_toggle || 2405 oldn->volume_level != newn->volume_level) { 2406 /* recently muted, or repeated mute keypress, or 2407 * multiple presses ending in mute */ 2408 issue_volchange(oldn->volume_level, newn->volume_level); 2409 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2410 } 2411 } else { 2412 /* unmute */ 2413 if (oldn->mute) { 2414 /* recently unmuted, issue 'unmute' keypress */ 2415 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2416 } 2417 if (oldn->volume_level != newn->volume_level) { 2418 issue_volchange(oldn->volume_level, newn->volume_level); 2419 } else if (oldn->volume_toggle != newn->volume_toggle) { 2420 /* repeated vol up/down keypress at end of scale ? */ 2421 if (newn->volume_level == 0) 2422 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2423 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2424 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2425 } 2426 } 2427 2428 /* handle brightness */ 2429 if (oldn->brightness_level != newn->brightness_level) { 2430 issue_brightnesschange(oldn->brightness_level, 2431 newn->brightness_level); 2432 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2433 /* repeated key presses that didn't change state */ 2434 if (newn->brightness_level == 0) 2435 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2436 else if (newn->brightness_level >= bright_maxlvl 2437 && !tp_features.bright_unkfw) 2438 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2439 } 2440 2441 #undef TPACPI_COMPARE_KEY 2442 #undef TPACPI_MAY_SEND_KEY 2443 } 2444 2445 /* 2446 * Polling driver 2447 * 2448 * We track all events in hotkey_source_mask all the time, since 2449 * most of them are edge-based. We only issue those requested by 2450 * hotkey_user_mask or hotkey_driver_mask, though. 2451 */ 2452 static int hotkey_kthread(void *data) 2453 { 2454 struct tp_nvram_state s[2]; 2455 u32 poll_mask, event_mask; 2456 unsigned int si, so; 2457 unsigned long t; 2458 unsigned int change_detector; 2459 unsigned int poll_freq; 2460 bool was_frozen; 2461 2462 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2463 goto exit; 2464 2465 set_freezable(); 2466 2467 so = 0; 2468 si = 1; 2469 t = 0; 2470 2471 /* Initial state for compares */ 2472 mutex_lock(&hotkey_thread_data_mutex); 2473 change_detector = hotkey_config_change; 2474 poll_mask = hotkey_source_mask; 2475 event_mask = hotkey_source_mask & 2476 (hotkey_driver_mask | hotkey_user_mask); 2477 poll_freq = hotkey_poll_freq; 2478 mutex_unlock(&hotkey_thread_data_mutex); 2479 hotkey_read_nvram(&s[so], poll_mask); 2480 2481 while (!kthread_should_stop()) { 2482 if (t == 0) { 2483 if (likely(poll_freq)) 2484 t = 1000/poll_freq; 2485 else 2486 t = 100; /* should never happen... */ 2487 } 2488 t = msleep_interruptible(t); 2489 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2490 break; 2491 2492 if (t > 0 && !was_frozen) 2493 continue; 2494 2495 mutex_lock(&hotkey_thread_data_mutex); 2496 if (was_frozen || hotkey_config_change != change_detector) { 2497 /* forget old state on thaw or config change */ 2498 si = so; 2499 t = 0; 2500 change_detector = hotkey_config_change; 2501 } 2502 poll_mask = hotkey_source_mask; 2503 event_mask = hotkey_source_mask & 2504 (hotkey_driver_mask | hotkey_user_mask); 2505 poll_freq = hotkey_poll_freq; 2506 mutex_unlock(&hotkey_thread_data_mutex); 2507 2508 if (likely(poll_mask)) { 2509 hotkey_read_nvram(&s[si], poll_mask); 2510 if (likely(si != so)) { 2511 hotkey_compare_and_issue_event(&s[so], &s[si], 2512 event_mask); 2513 } 2514 } 2515 2516 so = si; 2517 si ^= 1; 2518 } 2519 2520 exit: 2521 return 0; 2522 } 2523 2524 /* call with hotkey_mutex held */ 2525 static void hotkey_poll_stop_sync(void) 2526 { 2527 if (tpacpi_hotkey_task) { 2528 kthread_stop(tpacpi_hotkey_task); 2529 tpacpi_hotkey_task = NULL; 2530 } 2531 } 2532 2533 /* call with hotkey_mutex held */ 2534 static void hotkey_poll_setup(const bool may_warn) 2535 { 2536 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2537 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2538 2539 if (hotkey_poll_freq > 0 && 2540 (poll_driver_mask || 2541 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2542 if (!tpacpi_hotkey_task) { 2543 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2544 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2545 if (IS_ERR(tpacpi_hotkey_task)) { 2546 tpacpi_hotkey_task = NULL; 2547 pr_err("could not create kernel thread " 2548 "for hotkey polling\n"); 2549 } 2550 } 2551 } else { 2552 hotkey_poll_stop_sync(); 2553 if (may_warn && (poll_driver_mask || poll_user_mask) && 2554 hotkey_poll_freq == 0) { 2555 pr_notice("hot keys 0x%08x and/or events 0x%08x " 2556 "require polling, which is currently " 2557 "disabled\n", 2558 poll_user_mask, poll_driver_mask); 2559 } 2560 } 2561 } 2562 2563 static void hotkey_poll_setup_safe(const bool may_warn) 2564 { 2565 mutex_lock(&hotkey_mutex); 2566 hotkey_poll_setup(may_warn); 2567 mutex_unlock(&hotkey_mutex); 2568 } 2569 2570 /* call with hotkey_mutex held */ 2571 static void hotkey_poll_set_freq(unsigned int freq) 2572 { 2573 if (!freq) 2574 hotkey_poll_stop_sync(); 2575 2576 hotkey_poll_freq = freq; 2577 } 2578 2579 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2580 2581 static void hotkey_poll_setup(const bool __unused) 2582 { 2583 } 2584 2585 static void hotkey_poll_setup_safe(const bool __unused) 2586 { 2587 } 2588 2589 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2590 2591 static int hotkey_inputdev_open(struct input_dev *dev) 2592 { 2593 switch (tpacpi_lifecycle) { 2594 case TPACPI_LIFE_INIT: 2595 case TPACPI_LIFE_RUNNING: 2596 hotkey_poll_setup_safe(false); 2597 return 0; 2598 case TPACPI_LIFE_EXITING: 2599 return -EBUSY; 2600 } 2601 2602 /* Should only happen if tpacpi_lifecycle is corrupt */ 2603 BUG(); 2604 return -EBUSY; 2605 } 2606 2607 static void hotkey_inputdev_close(struct input_dev *dev) 2608 { 2609 /* disable hotkey polling when possible */ 2610 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2611 !(hotkey_source_mask & hotkey_driver_mask)) 2612 hotkey_poll_setup_safe(false); 2613 } 2614 2615 /* sysfs hotkey enable ------------------------------------------------- */ 2616 static ssize_t hotkey_enable_show(struct device *dev, 2617 struct device_attribute *attr, 2618 char *buf) 2619 { 2620 int res, status; 2621 2622 printk_deprecated_attribute("hotkey_enable", 2623 "Hotkey reporting is always enabled"); 2624 2625 res = hotkey_status_get(&status); 2626 if (res) 2627 return res; 2628 2629 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2630 } 2631 2632 static ssize_t hotkey_enable_store(struct device *dev, 2633 struct device_attribute *attr, 2634 const char *buf, size_t count) 2635 { 2636 unsigned long t; 2637 2638 printk_deprecated_attribute("hotkey_enable", 2639 "Hotkeys can be disabled through hotkey_mask"); 2640 2641 if (parse_strtoul(buf, 1, &t)) 2642 return -EINVAL; 2643 2644 if (t == 0) 2645 return -EPERM; 2646 2647 return count; 2648 } 2649 2650 static struct device_attribute dev_attr_hotkey_enable = 2651 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO, 2652 hotkey_enable_show, hotkey_enable_store); 2653 2654 /* sysfs hotkey mask --------------------------------------------------- */ 2655 static ssize_t hotkey_mask_show(struct device *dev, 2656 struct device_attribute *attr, 2657 char *buf) 2658 { 2659 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2660 } 2661 2662 static ssize_t hotkey_mask_store(struct device *dev, 2663 struct device_attribute *attr, 2664 const char *buf, size_t count) 2665 { 2666 unsigned long t; 2667 int res; 2668 2669 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2670 return -EINVAL; 2671 2672 if (mutex_lock_killable(&hotkey_mutex)) 2673 return -ERESTARTSYS; 2674 2675 res = hotkey_user_mask_set(t); 2676 2677 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2678 hotkey_poll_setup(true); 2679 #endif 2680 2681 mutex_unlock(&hotkey_mutex); 2682 2683 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2684 2685 return (res) ? res : count; 2686 } 2687 2688 static struct device_attribute dev_attr_hotkey_mask = 2689 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO, 2690 hotkey_mask_show, hotkey_mask_store); 2691 2692 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2693 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2694 struct device_attribute *attr, 2695 char *buf) 2696 { 2697 return sprintf(buf, "0\n"); 2698 } 2699 2700 static struct device_attribute dev_attr_hotkey_bios_enabled = 2701 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL); 2702 2703 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2704 static ssize_t hotkey_bios_mask_show(struct device *dev, 2705 struct device_attribute *attr, 2706 char *buf) 2707 { 2708 printk_deprecated_attribute("hotkey_bios_mask", 2709 "This attribute is useless."); 2710 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2711 } 2712 2713 static struct device_attribute dev_attr_hotkey_bios_mask = 2714 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL); 2715 2716 /* sysfs hotkey all_mask ----------------------------------------------- */ 2717 static ssize_t hotkey_all_mask_show(struct device *dev, 2718 struct device_attribute *attr, 2719 char *buf) 2720 { 2721 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2722 hotkey_all_mask | hotkey_source_mask); 2723 } 2724 2725 static struct device_attribute dev_attr_hotkey_all_mask = 2726 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL); 2727 2728 /* sysfs hotkey recommended_mask --------------------------------------- */ 2729 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2730 struct device_attribute *attr, 2731 char *buf) 2732 { 2733 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2734 (hotkey_all_mask | hotkey_source_mask) 2735 & ~hotkey_reserved_mask); 2736 } 2737 2738 static struct device_attribute dev_attr_hotkey_recommended_mask = 2739 __ATTR(hotkey_recommended_mask, S_IRUGO, 2740 hotkey_recommended_mask_show, NULL); 2741 2742 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2743 2744 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2745 static ssize_t hotkey_source_mask_show(struct device *dev, 2746 struct device_attribute *attr, 2747 char *buf) 2748 { 2749 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2750 } 2751 2752 static ssize_t hotkey_source_mask_store(struct device *dev, 2753 struct device_attribute *attr, 2754 const char *buf, size_t count) 2755 { 2756 unsigned long t; 2757 u32 r_ev; 2758 int rc; 2759 2760 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2761 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2762 return -EINVAL; 2763 2764 if (mutex_lock_killable(&hotkey_mutex)) 2765 return -ERESTARTSYS; 2766 2767 HOTKEY_CONFIG_CRITICAL_START 2768 hotkey_source_mask = t; 2769 HOTKEY_CONFIG_CRITICAL_END 2770 2771 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2772 ~hotkey_source_mask); 2773 hotkey_poll_setup(true); 2774 2775 /* check if events needed by the driver got disabled */ 2776 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2777 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2778 2779 mutex_unlock(&hotkey_mutex); 2780 2781 if (rc < 0) 2782 pr_err("hotkey_source_mask: " 2783 "failed to update the firmware event mask!\n"); 2784 2785 if (r_ev) 2786 pr_notice("hotkey_source_mask: " 2787 "some important events were disabled: 0x%04x\n", 2788 r_ev); 2789 2790 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2791 2792 return (rc < 0) ? rc : count; 2793 } 2794 2795 static struct device_attribute dev_attr_hotkey_source_mask = 2796 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO, 2797 hotkey_source_mask_show, hotkey_source_mask_store); 2798 2799 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2800 static ssize_t hotkey_poll_freq_show(struct device *dev, 2801 struct device_attribute *attr, 2802 char *buf) 2803 { 2804 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2805 } 2806 2807 static ssize_t hotkey_poll_freq_store(struct device *dev, 2808 struct device_attribute *attr, 2809 const char *buf, size_t count) 2810 { 2811 unsigned long t; 2812 2813 if (parse_strtoul(buf, 25, &t)) 2814 return -EINVAL; 2815 2816 if (mutex_lock_killable(&hotkey_mutex)) 2817 return -ERESTARTSYS; 2818 2819 hotkey_poll_set_freq(t); 2820 hotkey_poll_setup(true); 2821 2822 mutex_unlock(&hotkey_mutex); 2823 2824 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2825 2826 return count; 2827 } 2828 2829 static struct device_attribute dev_attr_hotkey_poll_freq = 2830 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO, 2831 hotkey_poll_freq_show, hotkey_poll_freq_store); 2832 2833 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2834 2835 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2836 static ssize_t hotkey_radio_sw_show(struct device *dev, 2837 struct device_attribute *attr, 2838 char *buf) 2839 { 2840 int res; 2841 res = hotkey_get_wlsw(); 2842 if (res < 0) 2843 return res; 2844 2845 /* Opportunistic update */ 2846 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2847 2848 return snprintf(buf, PAGE_SIZE, "%d\n", 2849 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2850 } 2851 2852 static struct device_attribute dev_attr_hotkey_radio_sw = 2853 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL); 2854 2855 static void hotkey_radio_sw_notify_change(void) 2856 { 2857 if (tp_features.hotkey_wlsw) 2858 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2859 "hotkey_radio_sw"); 2860 } 2861 2862 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2863 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2864 struct device_attribute *attr, 2865 char *buf) 2866 { 2867 int res, s; 2868 res = hotkey_get_tablet_mode(&s); 2869 if (res < 0) 2870 return res; 2871 2872 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2873 } 2874 2875 static struct device_attribute dev_attr_hotkey_tablet_mode = 2876 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL); 2877 2878 static void hotkey_tablet_mode_notify_change(void) 2879 { 2880 if (tp_features.hotkey_tablet) 2881 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2882 "hotkey_tablet_mode"); 2883 } 2884 2885 /* sysfs hotkey report_mode -------------------------------------------- */ 2886 static ssize_t hotkey_report_mode_show(struct device *dev, 2887 struct device_attribute *attr, 2888 char *buf) 2889 { 2890 return snprintf(buf, PAGE_SIZE, "%d\n", 2891 (hotkey_report_mode != 0) ? hotkey_report_mode : 1); 2892 } 2893 2894 static struct device_attribute dev_attr_hotkey_report_mode = 2895 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL); 2896 2897 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2898 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2899 struct device_attribute *attr, 2900 char *buf) 2901 { 2902 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2903 } 2904 2905 static struct device_attribute dev_attr_hotkey_wakeup_reason = 2906 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2907 2908 static void hotkey_wakeup_reason_notify_change(void) 2909 { 2910 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2911 "wakeup_reason"); 2912 } 2913 2914 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2915 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2916 struct device_attribute *attr, 2917 char *buf) 2918 { 2919 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2920 } 2921 2922 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete = 2923 __ATTR(wakeup_hotunplug_complete, S_IRUGO, 2924 hotkey_wakeup_hotunplug_complete_show, NULL); 2925 2926 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2927 { 2928 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2929 "wakeup_hotunplug_complete"); 2930 } 2931 2932 /* --------------------------------------------------------------------- */ 2933 2934 static struct attribute *hotkey_attributes[] __initdata = { 2935 &dev_attr_hotkey_enable.attr, 2936 &dev_attr_hotkey_bios_enabled.attr, 2937 &dev_attr_hotkey_bios_mask.attr, 2938 &dev_attr_hotkey_report_mode.attr, 2939 &dev_attr_hotkey_wakeup_reason.attr, 2940 &dev_attr_hotkey_wakeup_hotunplug_complete.attr, 2941 &dev_attr_hotkey_mask.attr, 2942 &dev_attr_hotkey_all_mask.attr, 2943 &dev_attr_hotkey_recommended_mask.attr, 2944 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2945 &dev_attr_hotkey_source_mask.attr, 2946 &dev_attr_hotkey_poll_freq.attr, 2947 #endif 2948 }; 2949 2950 /* 2951 * Sync both the hw and sw blocking state of all switches 2952 */ 2953 static void tpacpi_send_radiosw_update(void) 2954 { 2955 int wlsw; 2956 2957 /* 2958 * We must sync all rfkill controllers *before* issuing any 2959 * rfkill input events, or we will race the rfkill core input 2960 * handler. 2961 * 2962 * tpacpi_inputdev_send_mutex works as a synchronization point 2963 * for the above. 2964 * 2965 * We optimize to avoid numerous calls to hotkey_get_wlsw. 2966 */ 2967 2968 wlsw = hotkey_get_wlsw(); 2969 2970 /* Sync hw blocking state first if it is hw-blocked */ 2971 if (wlsw == TPACPI_RFK_RADIO_OFF) 2972 tpacpi_rfk_update_hwblock_state(true); 2973 2974 /* Sync sw blocking state */ 2975 tpacpi_rfk_update_swstate_all(); 2976 2977 /* Sync hw blocking state last if it is hw-unblocked */ 2978 if (wlsw == TPACPI_RFK_RADIO_ON) 2979 tpacpi_rfk_update_hwblock_state(false); 2980 2981 /* Issue rfkill input event for WLSW switch */ 2982 if (!(wlsw < 0)) { 2983 mutex_lock(&tpacpi_inputdev_send_mutex); 2984 2985 input_report_switch(tpacpi_inputdev, 2986 SW_RFKILL_ALL, (wlsw > 0)); 2987 input_sync(tpacpi_inputdev); 2988 2989 mutex_unlock(&tpacpi_inputdev_send_mutex); 2990 } 2991 2992 /* 2993 * this can be unconditional, as we will poll state again 2994 * if userspace uses the notify to read data 2995 */ 2996 hotkey_radio_sw_notify_change(); 2997 } 2998 2999 static void hotkey_exit(void) 3000 { 3001 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3002 mutex_lock(&hotkey_mutex); 3003 hotkey_poll_stop_sync(); 3004 mutex_unlock(&hotkey_mutex); 3005 #endif 3006 3007 if (hotkey_dev_attributes) 3008 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3009 3010 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3011 "restoring original HKEY status and mask\n"); 3012 /* yes, there is a bitwise or below, we want the 3013 * functions to be called even if one of them fail */ 3014 if (((tp_features.hotkey_mask && 3015 hotkey_mask_set(hotkey_orig_mask)) | 3016 hotkey_status_set(false)) != 0) 3017 pr_err("failed to restore hot key mask " 3018 "to BIOS defaults\n"); 3019 } 3020 3021 static void __init hotkey_unmap(const unsigned int scancode) 3022 { 3023 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3024 clear_bit(hotkey_keycode_map[scancode], 3025 tpacpi_inputdev->keybit); 3026 hotkey_keycode_map[scancode] = KEY_RESERVED; 3027 } 3028 } 3029 3030 /* 3031 * HKEY quirks: 3032 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3033 */ 3034 3035 #define TPACPI_HK_Q_INIMASK 0x0001 3036 3037 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3038 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3039 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3040 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3041 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3042 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3043 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3044 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3045 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3046 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3047 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3048 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3049 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3050 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3051 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3052 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3053 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3054 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3055 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3056 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3057 }; 3058 3059 typedef u16 tpacpi_keymap_entry_t; 3060 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3061 3062 static int __init hotkey_init(struct ibm_init_struct *iibm) 3063 { 3064 /* Requirements for changing the default keymaps: 3065 * 3066 * 1. Many of the keys are mapped to KEY_RESERVED for very 3067 * good reasons. Do not change them unless you have deep 3068 * knowledge on the IBM and Lenovo ThinkPad firmware for 3069 * the various ThinkPad models. The driver behaves 3070 * differently for KEY_RESERVED: such keys have their 3071 * hot key mask *unset* in mask_recommended, and also 3072 * in the initial hot key mask programmed into the 3073 * firmware at driver load time, which means the firm- 3074 * ware may react very differently if you change them to 3075 * something else; 3076 * 3077 * 2. You must be subscribed to the linux-thinkpad and 3078 * ibm-acpi-devel mailing lists, and you should read the 3079 * list archives since 2007 if you want to change the 3080 * keymaps. This requirement exists so that you will 3081 * know the past history of problems with the thinkpad- 3082 * acpi driver keymaps, and also that you will be 3083 * listening to any bug reports; 3084 * 3085 * 3. Do not send thinkpad-acpi specific patches directly to 3086 * for merging, *ever*. Send them to the linux-acpi 3087 * mailinglist for comments. Merging is to be done only 3088 * through acpi-test and the ACPI maintainer. 3089 * 3090 * If the above is too much to ask, don't change the keymap. 3091 * Ask the thinkpad-acpi maintainer to do it, instead. 3092 */ 3093 3094 enum keymap_index { 3095 TPACPI_KEYMAP_IBM_GENERIC = 0, 3096 TPACPI_KEYMAP_LENOVO_GENERIC, 3097 }; 3098 3099 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3100 /* Generic keymap for IBM ThinkPads */ 3101 [TPACPI_KEYMAP_IBM_GENERIC] = { 3102 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3103 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3104 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3105 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3106 3107 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3108 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3109 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3110 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3111 3112 /* brightness: firmware always reacts to them */ 3113 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3114 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3115 3116 /* Thinklight: firmware always react to it */ 3117 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3118 3119 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3120 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3121 3122 /* Volume: firmware always react to it and reprograms 3123 * the built-in *extra* mixer. Never map it to control 3124 * another mixer by default. */ 3125 KEY_RESERVED, /* 0x14: VOLUME UP */ 3126 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3127 KEY_RESERVED, /* 0x16: MUTE */ 3128 3129 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3130 3131 /* (assignments unknown, please report if found) */ 3132 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3133 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3134 }, 3135 3136 /* Generic keymap for Lenovo ThinkPads */ 3137 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3138 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3139 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3140 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3141 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3142 3143 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3144 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3145 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3146 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3147 3148 /* These should be enabled --only-- when ACPI video 3149 * is disabled (i.e. in "vendor" mode), and are handled 3150 * in a special way by the init code */ 3151 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3152 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3153 3154 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3155 3156 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3157 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3158 3159 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3160 * react to it and reprograms the built-in *extra* mixer. 3161 * Never map it to control another mixer by default. 3162 * 3163 * T60?, T61, R60?, R61: firmware and EC tries to send 3164 * these over the regular keyboard, so these are no-ops, 3165 * but there are still weird bugs re. MUTE, so do not 3166 * change unless you get test reports from all Lenovo 3167 * models. May cause the BIOS to interfere with the 3168 * HDA mixer. 3169 */ 3170 KEY_RESERVED, /* 0x14: VOLUME UP */ 3171 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3172 KEY_RESERVED, /* 0x16: MUTE */ 3173 3174 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3175 3176 /* (assignments unknown, please report if found) */ 3177 KEY_UNKNOWN, KEY_UNKNOWN, 3178 3179 /* 3180 * The mic mute button only sends 0x1a. It does not 3181 * automatically mute the mic or change the mute light. 3182 */ 3183 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3184 3185 /* (assignments unknown, please report if found) */ 3186 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3187 KEY_UNKNOWN, 3188 }, 3189 }; 3190 3191 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3192 /* Generic maps (fallback) */ 3193 { 3194 .vendor = PCI_VENDOR_ID_IBM, 3195 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3196 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3197 }, 3198 { 3199 .vendor = PCI_VENDOR_ID_LENOVO, 3200 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3201 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3202 }, 3203 }; 3204 3205 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3206 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3207 3208 int res, i; 3209 int status; 3210 int hkeyv; 3211 bool radiosw_state = false; 3212 bool tabletsw_state = false; 3213 3214 unsigned long quirks; 3215 unsigned long keymap_id; 3216 3217 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3218 "initializing hotkey subdriver\n"); 3219 3220 BUG_ON(!tpacpi_inputdev); 3221 BUG_ON(tpacpi_inputdev->open != NULL || 3222 tpacpi_inputdev->close != NULL); 3223 3224 TPACPI_ACPIHANDLE_INIT(hkey); 3225 mutex_init(&hotkey_mutex); 3226 3227 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3228 mutex_init(&hotkey_thread_data_mutex); 3229 #endif 3230 3231 /* hotkey not supported on 570 */ 3232 tp_features.hotkey = hkey_handle != NULL; 3233 3234 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3235 "hotkeys are %s\n", 3236 str_supported(tp_features.hotkey)); 3237 3238 if (!tp_features.hotkey) 3239 return 1; 3240 3241 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3242 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3243 3244 tpacpi_disable_brightness_delay(); 3245 3246 /* MUST have enough space for all attributes to be added to 3247 * hotkey_dev_attributes */ 3248 hotkey_dev_attributes = create_attr_set( 3249 ARRAY_SIZE(hotkey_attributes) + 2, 3250 NULL); 3251 if (!hotkey_dev_attributes) 3252 return -ENOMEM; 3253 res = add_many_to_attr_set(hotkey_dev_attributes, 3254 hotkey_attributes, 3255 ARRAY_SIZE(hotkey_attributes)); 3256 if (res) 3257 goto err_exit; 3258 3259 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3260 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3261 for HKEY interface version 0x100 */ 3262 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3263 if ((hkeyv >> 8) != 1) { 3264 pr_err("unknown version of the HKEY interface: 0x%x\n", 3265 hkeyv); 3266 pr_err("please report this to %s\n", TPACPI_MAIL); 3267 } else { 3268 /* 3269 * MHKV 0x100 in A31, R40, R40e, 3270 * T4x, X31, and later 3271 */ 3272 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3273 "firmware HKEY interface version: 0x%x\n", 3274 hkeyv); 3275 3276 /* Paranoia check AND init hotkey_all_mask */ 3277 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3278 "MHKA", "qd")) { 3279 pr_err("missing MHKA handler, " 3280 "please report this to %s\n", 3281 TPACPI_MAIL); 3282 /* Fallback: pre-init for FN+F3,F4,F12 */ 3283 hotkey_all_mask = 0x080cU; 3284 } else { 3285 tp_features.hotkey_mask = 1; 3286 } 3287 } 3288 } 3289 3290 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3291 "hotkey masks are %s\n", 3292 str_supported(tp_features.hotkey_mask)); 3293 3294 /* Init hotkey_all_mask if not initialized yet */ 3295 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3296 (quirks & TPACPI_HK_Q_INIMASK)) 3297 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3298 3299 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3300 if (tp_features.hotkey_mask) { 3301 /* hotkey_source_mask *must* be zero for 3302 * the first hotkey_mask_get to return hotkey_orig_mask */ 3303 res = hotkey_mask_get(); 3304 if (res) 3305 goto err_exit; 3306 3307 hotkey_orig_mask = hotkey_acpi_mask; 3308 } else { 3309 hotkey_orig_mask = hotkey_all_mask; 3310 hotkey_acpi_mask = hotkey_all_mask; 3311 } 3312 3313 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3314 if (dbg_wlswemul) { 3315 tp_features.hotkey_wlsw = 1; 3316 radiosw_state = !!tpacpi_wlsw_emulstate; 3317 pr_info("radio switch emulation enabled\n"); 3318 } else 3319 #endif 3320 /* Not all thinkpads have a hardware radio switch */ 3321 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3322 tp_features.hotkey_wlsw = 1; 3323 radiosw_state = !!status; 3324 pr_info("radio switch found; radios are %s\n", 3325 enabled(status, 0)); 3326 } 3327 if (tp_features.hotkey_wlsw) 3328 res = add_to_attr_set(hotkey_dev_attributes, 3329 &dev_attr_hotkey_radio_sw.attr); 3330 3331 /* For X41t, X60t, X61t Tablets... */ 3332 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3333 tp_features.hotkey_tablet = 1; 3334 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); 3335 pr_info("possible tablet mode switch found; " 3336 "ThinkPad in %s mode\n", 3337 (tabletsw_state) ? "tablet" : "laptop"); 3338 res = add_to_attr_set(hotkey_dev_attributes, 3339 &dev_attr_hotkey_tablet_mode.attr); 3340 } 3341 3342 if (!res) 3343 res = register_attr_set_with_sysfs( 3344 hotkey_dev_attributes, 3345 &tpacpi_pdev->dev.kobj); 3346 if (res) 3347 goto err_exit; 3348 3349 /* Set up key map */ 3350 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3351 GFP_KERNEL); 3352 if (!hotkey_keycode_map) { 3353 pr_err("failed to allocate memory for key map\n"); 3354 res = -ENOMEM; 3355 goto err_exit; 3356 } 3357 3358 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3359 ARRAY_SIZE(tpacpi_keymap_qtable)); 3360 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3361 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3362 "using keymap number %lu\n", keymap_id); 3363 3364 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3365 TPACPI_HOTKEY_MAP_SIZE); 3366 3367 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3368 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3369 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3370 tpacpi_inputdev->keycode = hotkey_keycode_map; 3371 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3372 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3373 input_set_capability(tpacpi_inputdev, EV_KEY, 3374 hotkey_keycode_map[i]); 3375 } else { 3376 if (i < sizeof(hotkey_reserved_mask)*8) 3377 hotkey_reserved_mask |= 1 << i; 3378 } 3379 } 3380 3381 if (tp_features.hotkey_wlsw) { 3382 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3383 input_report_switch(tpacpi_inputdev, 3384 SW_RFKILL_ALL, radiosw_state); 3385 } 3386 if (tp_features.hotkey_tablet) { 3387 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3388 input_report_switch(tpacpi_inputdev, 3389 SW_TABLET_MODE, tabletsw_state); 3390 } 3391 3392 /* Do not issue duplicate brightness change events to 3393 * userspace. tpacpi_detect_brightness_capabilities() must have 3394 * been called before this point */ 3395 if (acpi_video_backlight_support()) { 3396 pr_info("This ThinkPad has standard ACPI backlight " 3397 "brightness control, supported by the ACPI " 3398 "video driver\n"); 3399 pr_notice("Disabling thinkpad-acpi brightness events " 3400 "by default...\n"); 3401 3402 /* Disable brightness up/down on Lenovo thinkpads when 3403 * ACPI is handling them, otherwise it is plain impossible 3404 * for userspace to do something even remotely sane */ 3405 hotkey_reserved_mask |= 3406 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3407 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3408 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3409 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3410 } 3411 3412 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3413 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3414 & ~hotkey_all_mask 3415 & ~hotkey_reserved_mask; 3416 3417 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3418 "hotkey source mask 0x%08x, polling freq %u\n", 3419 hotkey_source_mask, hotkey_poll_freq); 3420 #endif 3421 3422 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3423 "enabling firmware HKEY event interface...\n"); 3424 res = hotkey_status_set(true); 3425 if (res) { 3426 hotkey_exit(); 3427 return res; 3428 } 3429 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3430 | hotkey_driver_mask) 3431 & ~hotkey_source_mask); 3432 if (res < 0 && res != -ENXIO) { 3433 hotkey_exit(); 3434 return res; 3435 } 3436 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3437 & ~hotkey_reserved_mask; 3438 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3439 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3440 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3441 3442 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3443 "legacy ibm/hotkey event reporting over procfs %s\n", 3444 (hotkey_report_mode < 2) ? 3445 "enabled" : "disabled"); 3446 3447 tpacpi_inputdev->open = &hotkey_inputdev_open; 3448 tpacpi_inputdev->close = &hotkey_inputdev_close; 3449 3450 hotkey_poll_setup_safe(true); 3451 3452 return 0; 3453 3454 err_exit: 3455 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3456 hotkey_dev_attributes = NULL; 3457 3458 return (res < 0)? res : 1; 3459 } 3460 3461 static bool hotkey_notify_hotkey(const u32 hkey, 3462 bool *send_acpi_ev, 3463 bool *ignore_acpi_ev) 3464 { 3465 /* 0x1000-0x1FFF: key presses */ 3466 unsigned int scancode = hkey & 0xfff; 3467 *send_acpi_ev = true; 3468 *ignore_acpi_ev = false; 3469 3470 /* HKEY event 0x1001 is scancode 0x00 */ 3471 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3472 scancode--; 3473 if (!(hotkey_source_mask & (1 << scancode))) { 3474 tpacpi_input_send_key_masked(scancode); 3475 *send_acpi_ev = false; 3476 } else { 3477 *ignore_acpi_ev = true; 3478 } 3479 return true; 3480 } 3481 return false; 3482 } 3483 3484 static bool hotkey_notify_wakeup(const u32 hkey, 3485 bool *send_acpi_ev, 3486 bool *ignore_acpi_ev) 3487 { 3488 /* 0x2000-0x2FFF: Wakeup reason */ 3489 *send_acpi_ev = true; 3490 *ignore_acpi_ev = false; 3491 3492 switch (hkey) { 3493 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3494 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3495 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3496 *ignore_acpi_ev = true; 3497 break; 3498 3499 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3500 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3501 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3502 *ignore_acpi_ev = true; 3503 break; 3504 3505 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3506 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3507 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3508 /* how to auto-heal: */ 3509 /* 2313: woke up from S3, go to S4/S5 */ 3510 /* 2413: woke up from S4, go to S5 */ 3511 break; 3512 3513 default: 3514 return false; 3515 } 3516 3517 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3518 pr_info("woke up due to a hot-unplug request...\n"); 3519 hotkey_wakeup_reason_notify_change(); 3520 } 3521 return true; 3522 } 3523 3524 static bool hotkey_notify_dockevent(const u32 hkey, 3525 bool *send_acpi_ev, 3526 bool *ignore_acpi_ev) 3527 { 3528 /* 0x4000-0x4FFF: dock-related events */ 3529 *send_acpi_ev = true; 3530 *ignore_acpi_ev = false; 3531 3532 switch (hkey) { 3533 case TP_HKEY_EV_UNDOCK_ACK: 3534 /* ACPI undock operation completed after wakeup */ 3535 hotkey_autosleep_ack = 1; 3536 pr_info("undocked\n"); 3537 hotkey_wakeup_hotunplug_complete_notify_change(); 3538 return true; 3539 3540 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3541 pr_info("docked into hotplug port replicator\n"); 3542 return true; 3543 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3544 pr_info("undocked from hotplug port replicator\n"); 3545 return true; 3546 3547 default: 3548 return false; 3549 } 3550 } 3551 3552 static bool hotkey_notify_usrevent(const u32 hkey, 3553 bool *send_acpi_ev, 3554 bool *ignore_acpi_ev) 3555 { 3556 /* 0x5000-0x5FFF: human interface helpers */ 3557 *send_acpi_ev = true; 3558 *ignore_acpi_ev = false; 3559 3560 switch (hkey) { 3561 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3562 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3563 return true; 3564 3565 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3566 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3567 tpacpi_input_send_tabletsw(); 3568 hotkey_tablet_mode_notify_change(); 3569 *send_acpi_ev = false; 3570 return true; 3571 3572 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3573 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3574 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3575 /* do not propagate these events */ 3576 *ignore_acpi_ev = true; 3577 return true; 3578 3579 default: 3580 return false; 3581 } 3582 } 3583 3584 static void thermal_dump_all_sensors(void); 3585 3586 static bool hotkey_notify_6xxx(const u32 hkey, 3587 bool *send_acpi_ev, 3588 bool *ignore_acpi_ev) 3589 { 3590 bool known = true; 3591 3592 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 3593 *send_acpi_ev = true; 3594 *ignore_acpi_ev = false; 3595 3596 switch (hkey) { 3597 case TP_HKEY_EV_THM_TABLE_CHANGED: 3598 pr_info("EC reports that Thermal Table has changed\n"); 3599 /* recommended action: do nothing, we don't have 3600 * Lenovo ATM information */ 3601 return true; 3602 case TP_HKEY_EV_ALARM_BAT_HOT: 3603 pr_crit("THERMAL ALARM: battery is too hot!\n"); 3604 /* recommended action: warn user through gui */ 3605 break; 3606 case TP_HKEY_EV_ALARM_BAT_XHOT: 3607 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 3608 /* recommended action: immediate sleep/hibernate */ 3609 break; 3610 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3611 pr_crit("THERMAL ALARM: " 3612 "a sensor reports something is too hot!\n"); 3613 /* recommended action: warn user through gui, that */ 3614 /* some internal component is too hot */ 3615 break; 3616 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3617 pr_alert("THERMAL EMERGENCY: " 3618 "a sensor reports something is extremely hot!\n"); 3619 /* recommended action: immediate sleep/hibernate */ 3620 break; 3621 case TP_HKEY_EV_AC_CHANGED: 3622 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 3623 * AC status changed; can be triggered by plugging or 3624 * unplugging AC adapter, docking or undocking. */ 3625 3626 /* fallthrough */ 3627 3628 case TP_HKEY_EV_KEY_NUMLOCK: 3629 case TP_HKEY_EV_KEY_FN: 3630 /* key press events, we just ignore them as long as the EC 3631 * is still reporting them in the normal keyboard stream */ 3632 *send_acpi_ev = false; 3633 *ignore_acpi_ev = true; 3634 return true; 3635 3636 default: 3637 pr_warn("unknown possible thermal alarm or keyboard event received\n"); 3638 known = false; 3639 } 3640 3641 thermal_dump_all_sensors(); 3642 3643 return known; 3644 } 3645 3646 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3647 { 3648 u32 hkey; 3649 bool send_acpi_ev; 3650 bool ignore_acpi_ev; 3651 bool known_ev; 3652 3653 if (event != 0x80) { 3654 pr_err("unknown HKEY notification event %d\n", event); 3655 /* forward it to userspace, maybe it knows how to handle it */ 3656 acpi_bus_generate_netlink_event( 3657 ibm->acpi->device->pnp.device_class, 3658 dev_name(&ibm->acpi->device->dev), 3659 event, 0); 3660 return; 3661 } 3662 3663 while (1) { 3664 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3665 pr_err("failed to retrieve HKEY event\n"); 3666 return; 3667 } 3668 3669 if (hkey == 0) { 3670 /* queue empty */ 3671 return; 3672 } 3673 3674 send_acpi_ev = true; 3675 ignore_acpi_ev = false; 3676 3677 switch (hkey >> 12) { 3678 case 1: 3679 /* 0x1000-0x1FFF: key presses */ 3680 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3681 &ignore_acpi_ev); 3682 break; 3683 case 2: 3684 /* 0x2000-0x2FFF: Wakeup reason */ 3685 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3686 &ignore_acpi_ev); 3687 break; 3688 case 3: 3689 /* 0x3000-0x3FFF: bay-related wakeups */ 3690 switch (hkey) { 3691 case TP_HKEY_EV_BAYEJ_ACK: 3692 hotkey_autosleep_ack = 1; 3693 pr_info("bay ejected\n"); 3694 hotkey_wakeup_hotunplug_complete_notify_change(); 3695 known_ev = true; 3696 break; 3697 case TP_HKEY_EV_OPTDRV_EJ: 3698 /* FIXME: kick libata if SATA link offline */ 3699 known_ev = true; 3700 break; 3701 default: 3702 known_ev = false; 3703 } 3704 break; 3705 case 4: 3706 /* 0x4000-0x4FFF: dock-related events */ 3707 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 3708 &ignore_acpi_ev); 3709 break; 3710 case 5: 3711 /* 0x5000-0x5FFF: human interface helpers */ 3712 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3713 &ignore_acpi_ev); 3714 break; 3715 case 6: 3716 /* 0x6000-0x6FFF: thermal alarms/notices and 3717 * keyboard events */ 3718 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 3719 &ignore_acpi_ev); 3720 break; 3721 case 7: 3722 /* 0x7000-0x7FFF: misc */ 3723 if (tp_features.hotkey_wlsw && 3724 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3725 tpacpi_send_radiosw_update(); 3726 send_acpi_ev = 0; 3727 known_ev = true; 3728 break; 3729 } 3730 /* fallthrough to default */ 3731 default: 3732 known_ev = false; 3733 } 3734 if (!known_ev) { 3735 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 3736 pr_notice("please report the conditions when this " 3737 "event happened to %s\n", TPACPI_MAIL); 3738 } 3739 3740 /* Legacy events */ 3741 if (!ignore_acpi_ev && 3742 (send_acpi_ev || hotkey_report_mode < 2)) { 3743 acpi_bus_generate_proc_event(ibm->acpi->device, 3744 event, hkey); 3745 } 3746 3747 /* netlink events */ 3748 if (!ignore_acpi_ev && send_acpi_ev) { 3749 acpi_bus_generate_netlink_event( 3750 ibm->acpi->device->pnp.device_class, 3751 dev_name(&ibm->acpi->device->dev), 3752 event, hkey); 3753 } 3754 } 3755 } 3756 3757 static void hotkey_suspend(void) 3758 { 3759 /* Do these on suspend, we get the events on early resume! */ 3760 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 3761 hotkey_autosleep_ack = 0; 3762 } 3763 3764 static void hotkey_resume(void) 3765 { 3766 tpacpi_disable_brightness_delay(); 3767 3768 if (hotkey_status_set(true) < 0 || 3769 hotkey_mask_set(hotkey_acpi_mask) < 0) 3770 pr_err("error while attempting to reset the event " 3771 "firmware interface\n"); 3772 3773 tpacpi_send_radiosw_update(); 3774 hotkey_tablet_mode_notify_change(); 3775 hotkey_wakeup_reason_notify_change(); 3776 hotkey_wakeup_hotunplug_complete_notify_change(); 3777 hotkey_poll_setup_safe(false); 3778 } 3779 3780 /* procfs -------------------------------------------------------------- */ 3781 static int hotkey_read(struct seq_file *m) 3782 { 3783 int res, status; 3784 3785 if (!tp_features.hotkey) { 3786 seq_printf(m, "status:\t\tnot supported\n"); 3787 return 0; 3788 } 3789 3790 if (mutex_lock_killable(&hotkey_mutex)) 3791 return -ERESTARTSYS; 3792 res = hotkey_status_get(&status); 3793 if (!res) 3794 res = hotkey_mask_get(); 3795 mutex_unlock(&hotkey_mutex); 3796 if (res) 3797 return res; 3798 3799 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 3800 if (hotkey_all_mask) { 3801 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 3802 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 3803 } else { 3804 seq_printf(m, "mask:\t\tnot supported\n"); 3805 seq_printf(m, "commands:\tenable, disable, reset\n"); 3806 } 3807 3808 return 0; 3809 } 3810 3811 static void hotkey_enabledisable_warn(bool enable) 3812 { 3813 tpacpi_log_usertask("procfs hotkey enable/disable"); 3814 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 3815 pr_fmt("hotkey enable/disable functionality has been " 3816 "removed from the driver. " 3817 "Hotkeys are always enabled.\n"))) 3818 pr_err("Please remove the hotkey=enable module " 3819 "parameter, it is deprecated. " 3820 "Hotkeys are always enabled.\n"); 3821 } 3822 3823 static int hotkey_write(char *buf) 3824 { 3825 int res; 3826 u32 mask; 3827 char *cmd; 3828 3829 if (!tp_features.hotkey) 3830 return -ENODEV; 3831 3832 if (mutex_lock_killable(&hotkey_mutex)) 3833 return -ERESTARTSYS; 3834 3835 mask = hotkey_user_mask; 3836 3837 res = 0; 3838 while ((cmd = next_cmd(&buf))) { 3839 if (strlencmp(cmd, "enable") == 0) { 3840 hotkey_enabledisable_warn(1); 3841 } else if (strlencmp(cmd, "disable") == 0) { 3842 hotkey_enabledisable_warn(0); 3843 res = -EPERM; 3844 } else if (strlencmp(cmd, "reset") == 0) { 3845 mask = (hotkey_all_mask | hotkey_source_mask) 3846 & ~hotkey_reserved_mask; 3847 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 3848 /* mask set */ 3849 } else if (sscanf(cmd, "%x", &mask) == 1) { 3850 /* mask set */ 3851 } else { 3852 res = -EINVAL; 3853 goto errexit; 3854 } 3855 } 3856 3857 if (!res) { 3858 tpacpi_disclose_usertask("procfs hotkey", 3859 "set mask to 0x%08x\n", mask); 3860 res = hotkey_user_mask_set(mask); 3861 } 3862 3863 errexit: 3864 mutex_unlock(&hotkey_mutex); 3865 return res; 3866 } 3867 3868 static const struct acpi_device_id ibm_htk_device_ids[] = { 3869 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 3870 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 3871 {"", 0}, 3872 }; 3873 3874 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 3875 .hid = ibm_htk_device_ids, 3876 .notify = hotkey_notify, 3877 .handle = &hkey_handle, 3878 .type = ACPI_DEVICE_NOTIFY, 3879 }; 3880 3881 static struct ibm_struct hotkey_driver_data = { 3882 .name = "hotkey", 3883 .read = hotkey_read, 3884 .write = hotkey_write, 3885 .exit = hotkey_exit, 3886 .resume = hotkey_resume, 3887 .suspend = hotkey_suspend, 3888 .acpi = &ibm_hotkey_acpidriver, 3889 }; 3890 3891 /************************************************************************* 3892 * Bluetooth subdriver 3893 */ 3894 3895 enum { 3896 /* ACPI GBDC/SBDC bits */ 3897 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 3898 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 3899 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 3900 0 = disable, 1 = enable */ 3901 }; 3902 3903 enum { 3904 /* ACPI \BLTH commands */ 3905 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 3906 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 3907 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 3908 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 3909 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 3910 }; 3911 3912 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 3913 3914 static int bluetooth_get_status(void) 3915 { 3916 int status; 3917 3918 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3919 if (dbg_bluetoothemul) 3920 return (tpacpi_bluetooth_emulstate) ? 3921 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3922 #endif 3923 3924 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 3925 return -EIO; 3926 3927 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 3928 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3929 } 3930 3931 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 3932 { 3933 int status; 3934 3935 vdbg_printk(TPACPI_DBG_RFKILL, 3936 "will attempt to %s bluetooth\n", 3937 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 3938 3939 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3940 if (dbg_bluetoothemul) { 3941 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 3942 return 0; 3943 } 3944 #endif 3945 3946 if (state == TPACPI_RFK_RADIO_ON) 3947 status = TP_ACPI_BLUETOOTH_RADIOSSW 3948 | TP_ACPI_BLUETOOTH_RESUMECTRL; 3949 else 3950 status = 0; 3951 3952 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 3953 return -EIO; 3954 3955 return 0; 3956 } 3957 3958 /* sysfs bluetooth enable ---------------------------------------------- */ 3959 static ssize_t bluetooth_enable_show(struct device *dev, 3960 struct device_attribute *attr, 3961 char *buf) 3962 { 3963 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 3964 attr, buf); 3965 } 3966 3967 static ssize_t bluetooth_enable_store(struct device *dev, 3968 struct device_attribute *attr, 3969 const char *buf, size_t count) 3970 { 3971 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 3972 attr, buf, count); 3973 } 3974 3975 static struct device_attribute dev_attr_bluetooth_enable = 3976 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO, 3977 bluetooth_enable_show, bluetooth_enable_store); 3978 3979 /* --------------------------------------------------------------------- */ 3980 3981 static struct attribute *bluetooth_attributes[] = { 3982 &dev_attr_bluetooth_enable.attr, 3983 NULL 3984 }; 3985 3986 static const struct attribute_group bluetooth_attr_group = { 3987 .attrs = bluetooth_attributes, 3988 }; 3989 3990 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 3991 .get_status = bluetooth_get_status, 3992 .set_status = bluetooth_set_status, 3993 }; 3994 3995 static void bluetooth_shutdown(void) 3996 { 3997 /* Order firmware to save current state to NVRAM */ 3998 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 3999 TP_ACPI_BLTH_SAVE_STATE)) 4000 pr_notice("failed to save bluetooth state to NVRAM\n"); 4001 else 4002 vdbg_printk(TPACPI_DBG_RFKILL, 4003 "bluetooth state saved to NVRAM\n"); 4004 } 4005 4006 static void bluetooth_exit(void) 4007 { 4008 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4009 &bluetooth_attr_group); 4010 4011 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4012 4013 bluetooth_shutdown(); 4014 } 4015 4016 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4017 { 4018 int res; 4019 int status = 0; 4020 4021 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4022 "initializing bluetooth subdriver\n"); 4023 4024 TPACPI_ACPIHANDLE_INIT(hkey); 4025 4026 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4027 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4028 tp_features.bluetooth = hkey_handle && 4029 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4030 4031 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4032 "bluetooth is %s, status 0x%02x\n", 4033 str_supported(tp_features.bluetooth), 4034 status); 4035 4036 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4037 if (dbg_bluetoothemul) { 4038 tp_features.bluetooth = 1; 4039 pr_info("bluetooth switch emulation enabled\n"); 4040 } else 4041 #endif 4042 if (tp_features.bluetooth && 4043 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4044 /* no bluetooth hardware present in system */ 4045 tp_features.bluetooth = 0; 4046 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4047 "bluetooth hardware not installed\n"); 4048 } 4049 4050 if (!tp_features.bluetooth) 4051 return 1; 4052 4053 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4054 &bluetooth_tprfk_ops, 4055 RFKILL_TYPE_BLUETOOTH, 4056 TPACPI_RFK_BLUETOOTH_SW_NAME, 4057 true); 4058 if (res) 4059 return res; 4060 4061 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4062 &bluetooth_attr_group); 4063 if (res) { 4064 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4065 return res; 4066 } 4067 4068 return 0; 4069 } 4070 4071 /* procfs -------------------------------------------------------------- */ 4072 static int bluetooth_read(struct seq_file *m) 4073 { 4074 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4075 } 4076 4077 static int bluetooth_write(char *buf) 4078 { 4079 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4080 } 4081 4082 static struct ibm_struct bluetooth_driver_data = { 4083 .name = "bluetooth", 4084 .read = bluetooth_read, 4085 .write = bluetooth_write, 4086 .exit = bluetooth_exit, 4087 .shutdown = bluetooth_shutdown, 4088 }; 4089 4090 /************************************************************************* 4091 * Wan subdriver 4092 */ 4093 4094 enum { 4095 /* ACPI GWAN/SWAN bits */ 4096 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4097 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4098 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4099 0 = disable, 1 = enable */ 4100 }; 4101 4102 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4103 4104 static int wan_get_status(void) 4105 { 4106 int status; 4107 4108 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4109 if (dbg_wwanemul) 4110 return (tpacpi_wwan_emulstate) ? 4111 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4112 #endif 4113 4114 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4115 return -EIO; 4116 4117 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4118 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4119 } 4120 4121 static int wan_set_status(enum tpacpi_rfkill_state state) 4122 { 4123 int status; 4124 4125 vdbg_printk(TPACPI_DBG_RFKILL, 4126 "will attempt to %s wwan\n", 4127 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4128 4129 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4130 if (dbg_wwanemul) { 4131 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4132 return 0; 4133 } 4134 #endif 4135 4136 if (state == TPACPI_RFK_RADIO_ON) 4137 status = TP_ACPI_WANCARD_RADIOSSW 4138 | TP_ACPI_WANCARD_RESUMECTRL; 4139 else 4140 status = 0; 4141 4142 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4143 return -EIO; 4144 4145 return 0; 4146 } 4147 4148 /* sysfs wan enable ---------------------------------------------------- */ 4149 static ssize_t wan_enable_show(struct device *dev, 4150 struct device_attribute *attr, 4151 char *buf) 4152 { 4153 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4154 attr, buf); 4155 } 4156 4157 static ssize_t wan_enable_store(struct device *dev, 4158 struct device_attribute *attr, 4159 const char *buf, size_t count) 4160 { 4161 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4162 attr, buf, count); 4163 } 4164 4165 static struct device_attribute dev_attr_wan_enable = 4166 __ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4167 wan_enable_show, wan_enable_store); 4168 4169 /* --------------------------------------------------------------------- */ 4170 4171 static struct attribute *wan_attributes[] = { 4172 &dev_attr_wan_enable.attr, 4173 NULL 4174 }; 4175 4176 static const struct attribute_group wan_attr_group = { 4177 .attrs = wan_attributes, 4178 }; 4179 4180 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4181 .get_status = wan_get_status, 4182 .set_status = wan_set_status, 4183 }; 4184 4185 static void wan_shutdown(void) 4186 { 4187 /* Order firmware to save current state to NVRAM */ 4188 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4189 TP_ACPI_WGSV_SAVE_STATE)) 4190 pr_notice("failed to save WWAN state to NVRAM\n"); 4191 else 4192 vdbg_printk(TPACPI_DBG_RFKILL, 4193 "WWAN state saved to NVRAM\n"); 4194 } 4195 4196 static void wan_exit(void) 4197 { 4198 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4199 &wan_attr_group); 4200 4201 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4202 4203 wan_shutdown(); 4204 } 4205 4206 static int __init wan_init(struct ibm_init_struct *iibm) 4207 { 4208 int res; 4209 int status = 0; 4210 4211 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4212 "initializing wan subdriver\n"); 4213 4214 TPACPI_ACPIHANDLE_INIT(hkey); 4215 4216 tp_features.wan = hkey_handle && 4217 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4218 4219 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4220 "wan is %s, status 0x%02x\n", 4221 str_supported(tp_features.wan), 4222 status); 4223 4224 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4225 if (dbg_wwanemul) { 4226 tp_features.wan = 1; 4227 pr_info("wwan switch emulation enabled\n"); 4228 } else 4229 #endif 4230 if (tp_features.wan && 4231 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4232 /* no wan hardware present in system */ 4233 tp_features.wan = 0; 4234 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4235 "wan hardware not installed\n"); 4236 } 4237 4238 if (!tp_features.wan) 4239 return 1; 4240 4241 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4242 &wan_tprfk_ops, 4243 RFKILL_TYPE_WWAN, 4244 TPACPI_RFK_WWAN_SW_NAME, 4245 true); 4246 if (res) 4247 return res; 4248 4249 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4250 &wan_attr_group); 4251 4252 if (res) { 4253 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4254 return res; 4255 } 4256 4257 return 0; 4258 } 4259 4260 /* procfs -------------------------------------------------------------- */ 4261 static int wan_read(struct seq_file *m) 4262 { 4263 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4264 } 4265 4266 static int wan_write(char *buf) 4267 { 4268 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4269 } 4270 4271 static struct ibm_struct wan_driver_data = { 4272 .name = "wan", 4273 .read = wan_read, 4274 .write = wan_write, 4275 .exit = wan_exit, 4276 .shutdown = wan_shutdown, 4277 }; 4278 4279 /************************************************************************* 4280 * UWB subdriver 4281 */ 4282 4283 enum { 4284 /* ACPI GUWB/SUWB bits */ 4285 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4286 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4287 }; 4288 4289 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4290 4291 static int uwb_get_status(void) 4292 { 4293 int status; 4294 4295 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4296 if (dbg_uwbemul) 4297 return (tpacpi_uwb_emulstate) ? 4298 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4299 #endif 4300 4301 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4302 return -EIO; 4303 4304 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4305 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4306 } 4307 4308 static int uwb_set_status(enum tpacpi_rfkill_state state) 4309 { 4310 int status; 4311 4312 vdbg_printk(TPACPI_DBG_RFKILL, 4313 "will attempt to %s UWB\n", 4314 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4315 4316 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4317 if (dbg_uwbemul) { 4318 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4319 return 0; 4320 } 4321 #endif 4322 4323 if (state == TPACPI_RFK_RADIO_ON) 4324 status = TP_ACPI_UWB_RADIOSSW; 4325 else 4326 status = 0; 4327 4328 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4329 return -EIO; 4330 4331 return 0; 4332 } 4333 4334 /* --------------------------------------------------------------------- */ 4335 4336 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4337 .get_status = uwb_get_status, 4338 .set_status = uwb_set_status, 4339 }; 4340 4341 static void uwb_exit(void) 4342 { 4343 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4344 } 4345 4346 static int __init uwb_init(struct ibm_init_struct *iibm) 4347 { 4348 int res; 4349 int status = 0; 4350 4351 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4352 "initializing uwb subdriver\n"); 4353 4354 TPACPI_ACPIHANDLE_INIT(hkey); 4355 4356 tp_features.uwb = hkey_handle && 4357 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4358 4359 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4360 "uwb is %s, status 0x%02x\n", 4361 str_supported(tp_features.uwb), 4362 status); 4363 4364 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4365 if (dbg_uwbemul) { 4366 tp_features.uwb = 1; 4367 pr_info("uwb switch emulation enabled\n"); 4368 } else 4369 #endif 4370 if (tp_features.uwb && 4371 !(status & TP_ACPI_UWB_HWPRESENT)) { 4372 /* no uwb hardware present in system */ 4373 tp_features.uwb = 0; 4374 dbg_printk(TPACPI_DBG_INIT, 4375 "uwb hardware not installed\n"); 4376 } 4377 4378 if (!tp_features.uwb) 4379 return 1; 4380 4381 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4382 &uwb_tprfk_ops, 4383 RFKILL_TYPE_UWB, 4384 TPACPI_RFK_UWB_SW_NAME, 4385 false); 4386 return res; 4387 } 4388 4389 static struct ibm_struct uwb_driver_data = { 4390 .name = "uwb", 4391 .exit = uwb_exit, 4392 .flags.experimental = 1, 4393 }; 4394 4395 /************************************************************************* 4396 * Video subdriver 4397 */ 4398 4399 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4400 4401 enum video_access_mode { 4402 TPACPI_VIDEO_NONE = 0, 4403 TPACPI_VIDEO_570, /* 570 */ 4404 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4405 TPACPI_VIDEO_NEW, /* all others */ 4406 }; 4407 4408 enum { /* video status flags, based on VIDEO_570 */ 4409 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4410 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4411 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4412 }; 4413 4414 enum { /* TPACPI_VIDEO_570 constants */ 4415 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4416 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4417 * video_status_flags */ 4418 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4419 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4420 }; 4421 4422 static enum video_access_mode video_supported; 4423 static int video_orig_autosw; 4424 4425 static int video_autosw_get(void); 4426 static int video_autosw_set(int enable); 4427 4428 TPACPI_HANDLE(vid, root, 4429 "\\_SB.PCI.AGP.VGA", /* 570 */ 4430 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4431 "\\_SB.PCI0.VID0", /* 770e */ 4432 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4433 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4434 "\\_SB.PCI0.AGP.VID", /* all others */ 4435 ); /* R30, R31 */ 4436 4437 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4438 4439 static int __init video_init(struct ibm_init_struct *iibm) 4440 { 4441 int ivga; 4442 4443 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4444 4445 TPACPI_ACPIHANDLE_INIT(vid); 4446 if (tpacpi_is_ibm()) 4447 TPACPI_ACPIHANDLE_INIT(vid2); 4448 4449 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4450 /* G41, assume IVGA doesn't change */ 4451 vid_handle = vid2_handle; 4452 4453 if (!vid_handle) 4454 /* video switching not supported on R30, R31 */ 4455 video_supported = TPACPI_VIDEO_NONE; 4456 else if (tpacpi_is_ibm() && 4457 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4458 /* 570 */ 4459 video_supported = TPACPI_VIDEO_570; 4460 else if (tpacpi_is_ibm() && 4461 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4462 /* 600e/x, 770e, 770x */ 4463 video_supported = TPACPI_VIDEO_770; 4464 else 4465 /* all others */ 4466 video_supported = TPACPI_VIDEO_NEW; 4467 4468 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4469 str_supported(video_supported != TPACPI_VIDEO_NONE), 4470 video_supported); 4471 4472 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1; 4473 } 4474 4475 static void video_exit(void) 4476 { 4477 dbg_printk(TPACPI_DBG_EXIT, 4478 "restoring original video autoswitch mode\n"); 4479 if (video_autosw_set(video_orig_autosw)) 4480 pr_err("error while trying to restore original " 4481 "video autoswitch mode\n"); 4482 } 4483 4484 static int video_outputsw_get(void) 4485 { 4486 int status = 0; 4487 int i; 4488 4489 switch (video_supported) { 4490 case TPACPI_VIDEO_570: 4491 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4492 TP_ACPI_VIDEO_570_PHSCMD)) 4493 return -EIO; 4494 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4495 break; 4496 case TPACPI_VIDEO_770: 4497 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4498 return -EIO; 4499 if (i) 4500 status |= TP_ACPI_VIDEO_S_LCD; 4501 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4502 return -EIO; 4503 if (i) 4504 status |= TP_ACPI_VIDEO_S_CRT; 4505 break; 4506 case TPACPI_VIDEO_NEW: 4507 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4508 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4509 return -EIO; 4510 if (i) 4511 status |= TP_ACPI_VIDEO_S_CRT; 4512 4513 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4514 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4515 return -EIO; 4516 if (i) 4517 status |= TP_ACPI_VIDEO_S_LCD; 4518 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4519 return -EIO; 4520 if (i) 4521 status |= TP_ACPI_VIDEO_S_DVI; 4522 break; 4523 default: 4524 return -ENOSYS; 4525 } 4526 4527 return status; 4528 } 4529 4530 static int video_outputsw_set(int status) 4531 { 4532 int autosw; 4533 int res = 0; 4534 4535 switch (video_supported) { 4536 case TPACPI_VIDEO_570: 4537 res = acpi_evalf(NULL, NULL, 4538 "\\_SB.PHS2", "vdd", 4539 TP_ACPI_VIDEO_570_PHS2CMD, 4540 status | TP_ACPI_VIDEO_570_PHS2SET); 4541 break; 4542 case TPACPI_VIDEO_770: 4543 autosw = video_autosw_get(); 4544 if (autosw < 0) 4545 return autosw; 4546 4547 res = video_autosw_set(1); 4548 if (res) 4549 return res; 4550 res = acpi_evalf(vid_handle, NULL, 4551 "ASWT", "vdd", status * 0x100, 0); 4552 if (!autosw && video_autosw_set(autosw)) { 4553 pr_err("video auto-switch left enabled due to error\n"); 4554 return -EIO; 4555 } 4556 break; 4557 case TPACPI_VIDEO_NEW: 4558 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4559 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4560 break; 4561 default: 4562 return -ENOSYS; 4563 } 4564 4565 return (res)? 0 : -EIO; 4566 } 4567 4568 static int video_autosw_get(void) 4569 { 4570 int autosw = 0; 4571 4572 switch (video_supported) { 4573 case TPACPI_VIDEO_570: 4574 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4575 return -EIO; 4576 break; 4577 case TPACPI_VIDEO_770: 4578 case TPACPI_VIDEO_NEW: 4579 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4580 return -EIO; 4581 break; 4582 default: 4583 return -ENOSYS; 4584 } 4585 4586 return autosw & 1; 4587 } 4588 4589 static int video_autosw_set(int enable) 4590 { 4591 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0)) 4592 return -EIO; 4593 return 0; 4594 } 4595 4596 static int video_outputsw_cycle(void) 4597 { 4598 int autosw = video_autosw_get(); 4599 int res; 4600 4601 if (autosw < 0) 4602 return autosw; 4603 4604 switch (video_supported) { 4605 case TPACPI_VIDEO_570: 4606 res = video_autosw_set(1); 4607 if (res) 4608 return res; 4609 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4610 break; 4611 case TPACPI_VIDEO_770: 4612 case TPACPI_VIDEO_NEW: 4613 res = video_autosw_set(1); 4614 if (res) 4615 return res; 4616 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4617 break; 4618 default: 4619 return -ENOSYS; 4620 } 4621 if (!autosw && video_autosw_set(autosw)) { 4622 pr_err("video auto-switch left enabled due to error\n"); 4623 return -EIO; 4624 } 4625 4626 return (res)? 0 : -EIO; 4627 } 4628 4629 static int video_expand_toggle(void) 4630 { 4631 switch (video_supported) { 4632 case TPACPI_VIDEO_570: 4633 return acpi_evalf(ec_handle, NULL, "_Q17", "v")? 4634 0 : -EIO; 4635 case TPACPI_VIDEO_770: 4636 return acpi_evalf(vid_handle, NULL, "VEXP", "v")? 4637 0 : -EIO; 4638 case TPACPI_VIDEO_NEW: 4639 return acpi_evalf(NULL, NULL, "\\VEXP", "v")? 4640 0 : -EIO; 4641 default: 4642 return -ENOSYS; 4643 } 4644 /* not reached */ 4645 } 4646 4647 static int video_read(struct seq_file *m) 4648 { 4649 int status, autosw; 4650 4651 if (video_supported == TPACPI_VIDEO_NONE) { 4652 seq_printf(m, "status:\t\tnot supported\n"); 4653 return 0; 4654 } 4655 4656 /* Even reads can crash X.org, so... */ 4657 if (!capable(CAP_SYS_ADMIN)) 4658 return -EPERM; 4659 4660 status = video_outputsw_get(); 4661 if (status < 0) 4662 return status; 4663 4664 autosw = video_autosw_get(); 4665 if (autosw < 0) 4666 return autosw; 4667 4668 seq_printf(m, "status:\t\tsupported\n"); 4669 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4670 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4671 if (video_supported == TPACPI_VIDEO_NEW) 4672 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 4673 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 4674 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 4675 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 4676 if (video_supported == TPACPI_VIDEO_NEW) 4677 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 4678 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 4679 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 4680 4681 return 0; 4682 } 4683 4684 static int video_write(char *buf) 4685 { 4686 char *cmd; 4687 int enable, disable, status; 4688 int res; 4689 4690 if (video_supported == TPACPI_VIDEO_NONE) 4691 return -ENODEV; 4692 4693 /* Even reads can crash X.org, let alone writes... */ 4694 if (!capable(CAP_SYS_ADMIN)) 4695 return -EPERM; 4696 4697 enable = 0; 4698 disable = 0; 4699 4700 while ((cmd = next_cmd(&buf))) { 4701 if (strlencmp(cmd, "lcd_enable") == 0) { 4702 enable |= TP_ACPI_VIDEO_S_LCD; 4703 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4704 disable |= TP_ACPI_VIDEO_S_LCD; 4705 } else if (strlencmp(cmd, "crt_enable") == 0) { 4706 enable |= TP_ACPI_VIDEO_S_CRT; 4707 } else if (strlencmp(cmd, "crt_disable") == 0) { 4708 disable |= TP_ACPI_VIDEO_S_CRT; 4709 } else if (video_supported == TPACPI_VIDEO_NEW && 4710 strlencmp(cmd, "dvi_enable") == 0) { 4711 enable |= TP_ACPI_VIDEO_S_DVI; 4712 } else if (video_supported == TPACPI_VIDEO_NEW && 4713 strlencmp(cmd, "dvi_disable") == 0) { 4714 disable |= TP_ACPI_VIDEO_S_DVI; 4715 } else if (strlencmp(cmd, "auto_enable") == 0) { 4716 res = video_autosw_set(1); 4717 if (res) 4718 return res; 4719 } else if (strlencmp(cmd, "auto_disable") == 0) { 4720 res = video_autosw_set(0); 4721 if (res) 4722 return res; 4723 } else if (strlencmp(cmd, "video_switch") == 0) { 4724 res = video_outputsw_cycle(); 4725 if (res) 4726 return res; 4727 } else if (strlencmp(cmd, "expand_toggle") == 0) { 4728 res = video_expand_toggle(); 4729 if (res) 4730 return res; 4731 } else 4732 return -EINVAL; 4733 } 4734 4735 if (enable || disable) { 4736 status = video_outputsw_get(); 4737 if (status < 0) 4738 return status; 4739 res = video_outputsw_set((status & ~disable) | enable); 4740 if (res) 4741 return res; 4742 } 4743 4744 return 0; 4745 } 4746 4747 static struct ibm_struct video_driver_data = { 4748 .name = "video", 4749 .read = video_read, 4750 .write = video_write, 4751 .exit = video_exit, 4752 }; 4753 4754 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 4755 4756 /************************************************************************* 4757 * Light (thinklight) subdriver 4758 */ 4759 4760 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 4761 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 4762 4763 static int light_get_status(void) 4764 { 4765 int status = 0; 4766 4767 if (tp_features.light_status) { 4768 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 4769 return -EIO; 4770 return (!!status); 4771 } 4772 4773 return -ENXIO; 4774 } 4775 4776 static int light_set_status(int status) 4777 { 4778 int rc; 4779 4780 if (tp_features.light) { 4781 if (cmos_handle) { 4782 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 4783 (status)? 4784 TP_CMOS_THINKLIGHT_ON : 4785 TP_CMOS_THINKLIGHT_OFF); 4786 } else { 4787 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 4788 (status)? 1 : 0); 4789 } 4790 return (rc)? 0 : -EIO; 4791 } 4792 4793 return -ENXIO; 4794 } 4795 4796 static void light_set_status_worker(struct work_struct *work) 4797 { 4798 struct tpacpi_led_classdev *data = 4799 container_of(work, struct tpacpi_led_classdev, work); 4800 4801 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 4802 light_set_status((data->new_state != TPACPI_LED_OFF)); 4803 } 4804 4805 static void light_sysfs_set(struct led_classdev *led_cdev, 4806 enum led_brightness brightness) 4807 { 4808 struct tpacpi_led_classdev *data = 4809 container_of(led_cdev, 4810 struct tpacpi_led_classdev, 4811 led_classdev); 4812 data->new_state = (brightness != LED_OFF) ? 4813 TPACPI_LED_ON : TPACPI_LED_OFF; 4814 queue_work(tpacpi_wq, &data->work); 4815 } 4816 4817 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 4818 { 4819 return (light_get_status() == 1)? LED_FULL : LED_OFF; 4820 } 4821 4822 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 4823 .led_classdev = { 4824 .name = "tpacpi::thinklight", 4825 .brightness_set = &light_sysfs_set, 4826 .brightness_get = &light_sysfs_get, 4827 } 4828 }; 4829 4830 static int __init light_init(struct ibm_init_struct *iibm) 4831 { 4832 int rc; 4833 4834 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 4835 4836 if (tpacpi_is_ibm()) { 4837 TPACPI_ACPIHANDLE_INIT(ledb); 4838 TPACPI_ACPIHANDLE_INIT(lght); 4839 } 4840 TPACPI_ACPIHANDLE_INIT(cmos); 4841 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 4842 4843 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 4844 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 4845 4846 if (tp_features.light) 4847 /* light status not supported on 4848 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 4849 tp_features.light_status = 4850 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 4851 4852 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 4853 str_supported(tp_features.light), 4854 str_supported(tp_features.light_status)); 4855 4856 if (!tp_features.light) 4857 return 1; 4858 4859 rc = led_classdev_register(&tpacpi_pdev->dev, 4860 &tpacpi_led_thinklight.led_classdev); 4861 4862 if (rc < 0) { 4863 tp_features.light = 0; 4864 tp_features.light_status = 0; 4865 } else { 4866 rc = 0; 4867 } 4868 4869 return rc; 4870 } 4871 4872 static void light_exit(void) 4873 { 4874 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 4875 flush_workqueue(tpacpi_wq); 4876 } 4877 4878 static int light_read(struct seq_file *m) 4879 { 4880 int status; 4881 4882 if (!tp_features.light) { 4883 seq_printf(m, "status:\t\tnot supported\n"); 4884 } else if (!tp_features.light_status) { 4885 seq_printf(m, "status:\t\tunknown\n"); 4886 seq_printf(m, "commands:\ton, off\n"); 4887 } else { 4888 status = light_get_status(); 4889 if (status < 0) 4890 return status; 4891 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 4892 seq_printf(m, "commands:\ton, off\n"); 4893 } 4894 4895 return 0; 4896 } 4897 4898 static int light_write(char *buf) 4899 { 4900 char *cmd; 4901 int newstatus = 0; 4902 4903 if (!tp_features.light) 4904 return -ENODEV; 4905 4906 while ((cmd = next_cmd(&buf))) { 4907 if (strlencmp(cmd, "on") == 0) { 4908 newstatus = 1; 4909 } else if (strlencmp(cmd, "off") == 0) { 4910 newstatus = 0; 4911 } else 4912 return -EINVAL; 4913 } 4914 4915 return light_set_status(newstatus); 4916 } 4917 4918 static struct ibm_struct light_driver_data = { 4919 .name = "light", 4920 .read = light_read, 4921 .write = light_write, 4922 .exit = light_exit, 4923 }; 4924 4925 /************************************************************************* 4926 * CMOS subdriver 4927 */ 4928 4929 /* sysfs cmos_command -------------------------------------------------- */ 4930 static ssize_t cmos_command_store(struct device *dev, 4931 struct device_attribute *attr, 4932 const char *buf, size_t count) 4933 { 4934 unsigned long cmos_cmd; 4935 int res; 4936 4937 if (parse_strtoul(buf, 21, &cmos_cmd)) 4938 return -EINVAL; 4939 4940 res = issue_thinkpad_cmos_command(cmos_cmd); 4941 return (res)? res : count; 4942 } 4943 4944 static struct device_attribute dev_attr_cmos_command = 4945 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store); 4946 4947 /* --------------------------------------------------------------------- */ 4948 4949 static int __init cmos_init(struct ibm_init_struct *iibm) 4950 { 4951 int res; 4952 4953 vdbg_printk(TPACPI_DBG_INIT, 4954 "initializing cmos commands subdriver\n"); 4955 4956 TPACPI_ACPIHANDLE_INIT(cmos); 4957 4958 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 4959 str_supported(cmos_handle != NULL)); 4960 4961 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4962 if (res) 4963 return res; 4964 4965 return (cmos_handle)? 0 : 1; 4966 } 4967 4968 static void cmos_exit(void) 4969 { 4970 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4971 } 4972 4973 static int cmos_read(struct seq_file *m) 4974 { 4975 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4976 R30, R31, T20-22, X20-21 */ 4977 if (!cmos_handle) 4978 seq_printf(m, "status:\t\tnot supported\n"); 4979 else { 4980 seq_printf(m, "status:\t\tsupported\n"); 4981 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 4982 } 4983 4984 return 0; 4985 } 4986 4987 static int cmos_write(char *buf) 4988 { 4989 char *cmd; 4990 int cmos_cmd, res; 4991 4992 while ((cmd = next_cmd(&buf))) { 4993 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 4994 cmos_cmd >= 0 && cmos_cmd <= 21) { 4995 /* cmos_cmd set */ 4996 } else 4997 return -EINVAL; 4998 4999 res = issue_thinkpad_cmos_command(cmos_cmd); 5000 if (res) 5001 return res; 5002 } 5003 5004 return 0; 5005 } 5006 5007 static struct ibm_struct cmos_driver_data = { 5008 .name = "cmos", 5009 .read = cmos_read, 5010 .write = cmos_write, 5011 .exit = cmos_exit, 5012 }; 5013 5014 /************************************************************************* 5015 * LED subdriver 5016 */ 5017 5018 enum led_access_mode { 5019 TPACPI_LED_NONE = 0, 5020 TPACPI_LED_570, /* 570 */ 5021 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5022 TPACPI_LED_NEW, /* all others */ 5023 }; 5024 5025 enum { /* For TPACPI_LED_OLD */ 5026 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5027 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5028 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5029 }; 5030 5031 static enum led_access_mode led_supported; 5032 5033 static acpi_handle led_handle; 5034 5035 #define TPACPI_LED_NUMLEDS 16 5036 static struct tpacpi_led_classdev *tpacpi_leds; 5037 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5038 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5039 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5040 "tpacpi::power", 5041 "tpacpi:orange:batt", 5042 "tpacpi:green:batt", 5043 "tpacpi::dock_active", 5044 "tpacpi::bay_active", 5045 "tpacpi::dock_batt", 5046 "tpacpi::unknown_led", 5047 "tpacpi::standby", 5048 "tpacpi::dock_status1", 5049 "tpacpi::dock_status2", 5050 "tpacpi::unknown_led2", 5051 "tpacpi::unknown_led3", 5052 "tpacpi::thinkvantage", 5053 }; 5054 #define TPACPI_SAFE_LEDS 0x1081U 5055 5056 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5057 { 5058 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5059 return false; 5060 #else 5061 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5062 #endif 5063 } 5064 5065 static int led_get_status(const unsigned int led) 5066 { 5067 int status; 5068 enum led_status_t led_s; 5069 5070 switch (led_supported) { 5071 case TPACPI_LED_570: 5072 if (!acpi_evalf(ec_handle, 5073 &status, "GLED", "dd", 1 << led)) 5074 return -EIO; 5075 led_s = (status == 0)? 5076 TPACPI_LED_OFF : 5077 ((status == 1)? 5078 TPACPI_LED_ON : 5079 TPACPI_LED_BLINK); 5080 tpacpi_led_state_cache[led] = led_s; 5081 return led_s; 5082 default: 5083 return -ENXIO; 5084 } 5085 5086 /* not reached */ 5087 } 5088 5089 static int led_set_status(const unsigned int led, 5090 const enum led_status_t ledstatus) 5091 { 5092 /* off, on, blink. Index is led_status_t */ 5093 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5094 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5095 5096 int rc = 0; 5097 5098 switch (led_supported) { 5099 case TPACPI_LED_570: 5100 /* 570 */ 5101 if (unlikely(led > 7)) 5102 return -EINVAL; 5103 if (unlikely(tpacpi_is_led_restricted(led))) 5104 return -EPERM; 5105 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5106 (1 << led), led_sled_arg1[ledstatus])) 5107 rc = -EIO; 5108 break; 5109 case TPACPI_LED_OLD: 5110 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5111 if (unlikely(led > 7)) 5112 return -EINVAL; 5113 if (unlikely(tpacpi_is_led_restricted(led))) 5114 return -EPERM; 5115 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5116 if (rc >= 0) 5117 rc = ec_write(TPACPI_LED_EC_HLBL, 5118 (ledstatus == TPACPI_LED_BLINK) << led); 5119 if (rc >= 0) 5120 rc = ec_write(TPACPI_LED_EC_HLCL, 5121 (ledstatus != TPACPI_LED_OFF) << led); 5122 break; 5123 case TPACPI_LED_NEW: 5124 /* all others */ 5125 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5126 return -EINVAL; 5127 if (unlikely(tpacpi_is_led_restricted(led))) 5128 return -EPERM; 5129 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5130 led, led_led_arg1[ledstatus])) 5131 rc = -EIO; 5132 break; 5133 default: 5134 rc = -ENXIO; 5135 } 5136 5137 if (!rc) 5138 tpacpi_led_state_cache[led] = ledstatus; 5139 5140 return rc; 5141 } 5142 5143 static void led_set_status_worker(struct work_struct *work) 5144 { 5145 struct tpacpi_led_classdev *data = 5146 container_of(work, struct tpacpi_led_classdev, work); 5147 5148 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5149 led_set_status(data->led, data->new_state); 5150 } 5151 5152 static void led_sysfs_set(struct led_classdev *led_cdev, 5153 enum led_brightness brightness) 5154 { 5155 struct tpacpi_led_classdev *data = container_of(led_cdev, 5156 struct tpacpi_led_classdev, led_classdev); 5157 5158 if (brightness == LED_OFF) 5159 data->new_state = TPACPI_LED_OFF; 5160 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5161 data->new_state = TPACPI_LED_ON; 5162 else 5163 data->new_state = TPACPI_LED_BLINK; 5164 5165 queue_work(tpacpi_wq, &data->work); 5166 } 5167 5168 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5169 unsigned long *delay_on, unsigned long *delay_off) 5170 { 5171 struct tpacpi_led_classdev *data = container_of(led_cdev, 5172 struct tpacpi_led_classdev, led_classdev); 5173 5174 /* Can we choose the flash rate? */ 5175 if (*delay_on == 0 && *delay_off == 0) { 5176 /* yes. set them to the hardware blink rate (1 Hz) */ 5177 *delay_on = 500; /* ms */ 5178 *delay_off = 500; /* ms */ 5179 } else if ((*delay_on != 500) || (*delay_off != 500)) 5180 return -EINVAL; 5181 5182 data->new_state = TPACPI_LED_BLINK; 5183 queue_work(tpacpi_wq, &data->work); 5184 5185 return 0; 5186 } 5187 5188 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5189 { 5190 int rc; 5191 5192 struct tpacpi_led_classdev *data = container_of(led_cdev, 5193 struct tpacpi_led_classdev, led_classdev); 5194 5195 rc = led_get_status(data->led); 5196 5197 if (rc == TPACPI_LED_OFF || rc < 0) 5198 rc = LED_OFF; /* no error handling in led class :( */ 5199 else 5200 rc = LED_FULL; 5201 5202 return rc; 5203 } 5204 5205 static void led_exit(void) 5206 { 5207 unsigned int i; 5208 5209 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5210 if (tpacpi_leds[i].led_classdev.name) 5211 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5212 } 5213 5214 flush_workqueue(tpacpi_wq); 5215 kfree(tpacpi_leds); 5216 } 5217 5218 static int __init tpacpi_init_led(unsigned int led) 5219 { 5220 int rc; 5221 5222 tpacpi_leds[led].led = led; 5223 5224 /* LEDs with no name don't get registered */ 5225 if (!tpacpi_led_names[led]) 5226 return 0; 5227 5228 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5229 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5230 if (led_supported == TPACPI_LED_570) 5231 tpacpi_leds[led].led_classdev.brightness_get = 5232 &led_sysfs_get; 5233 5234 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5235 5236 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5237 5238 rc = led_classdev_register(&tpacpi_pdev->dev, 5239 &tpacpi_leds[led].led_classdev); 5240 if (rc < 0) 5241 tpacpi_leds[led].led_classdev.name = NULL; 5242 5243 return rc; 5244 } 5245 5246 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5247 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5248 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5249 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5250 5251 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5252 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5253 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5254 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5255 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5256 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5257 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5258 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5259 5260 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5261 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5262 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5263 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5264 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5265 5266 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5267 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5268 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5269 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5270 5271 /* (1) - may have excess leds enabled on MSB */ 5272 5273 /* Defaults (order matters, keep last, don't reorder!) */ 5274 { /* Lenovo */ 5275 .vendor = PCI_VENDOR_ID_LENOVO, 5276 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5277 .quirks = 0x1fffU, 5278 }, 5279 { /* IBM ThinkPads with no EC version string */ 5280 .vendor = PCI_VENDOR_ID_IBM, 5281 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5282 .quirks = 0x00ffU, 5283 }, 5284 { /* IBM ThinkPads with EC version string */ 5285 .vendor = PCI_VENDOR_ID_IBM, 5286 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5287 .quirks = 0x00bfU, 5288 }, 5289 }; 5290 5291 #undef TPACPI_LEDQ_IBM 5292 #undef TPACPI_LEDQ_LNV 5293 5294 static enum led_access_mode __init led_init_detect_mode(void) 5295 { 5296 acpi_status status; 5297 5298 if (tpacpi_is_ibm()) { 5299 /* 570 */ 5300 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5301 if (ACPI_SUCCESS(status)) 5302 return TPACPI_LED_570; 5303 5304 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5305 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5306 if (ACPI_SUCCESS(status)) 5307 return TPACPI_LED_OLD; 5308 } 5309 5310 /* most others */ 5311 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5312 if (ACPI_SUCCESS(status)) 5313 return TPACPI_LED_NEW; 5314 5315 /* R30, R31, and unknown firmwares */ 5316 led_handle = NULL; 5317 return TPACPI_LED_NONE; 5318 } 5319 5320 static int __init led_init(struct ibm_init_struct *iibm) 5321 { 5322 unsigned int i; 5323 int rc; 5324 unsigned long useful_leds; 5325 5326 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5327 5328 led_supported = led_init_detect_mode(); 5329 5330 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5331 str_supported(led_supported), led_supported); 5332 5333 if (led_supported == TPACPI_LED_NONE) 5334 return 1; 5335 5336 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5337 GFP_KERNEL); 5338 if (!tpacpi_leds) { 5339 pr_err("Out of memory for LED data\n"); 5340 return -ENOMEM; 5341 } 5342 5343 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5344 ARRAY_SIZE(led_useful_qtable)); 5345 5346 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5347 if (!tpacpi_is_led_restricted(i) && 5348 test_bit(i, &useful_leds)) { 5349 rc = tpacpi_init_led(i); 5350 if (rc < 0) { 5351 led_exit(); 5352 return rc; 5353 } 5354 } 5355 } 5356 5357 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5358 pr_notice("warning: userspace override of important " 5359 "firmware LEDs is enabled\n"); 5360 #endif 5361 return 0; 5362 } 5363 5364 #define str_led_status(s) \ 5365 ((s) == TPACPI_LED_OFF ? "off" : \ 5366 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5367 5368 static int led_read(struct seq_file *m) 5369 { 5370 if (!led_supported) { 5371 seq_printf(m, "status:\t\tnot supported\n"); 5372 return 0; 5373 } 5374 seq_printf(m, "status:\t\tsupported\n"); 5375 5376 if (led_supported == TPACPI_LED_570) { 5377 /* 570 */ 5378 int i, status; 5379 for (i = 0; i < 8; i++) { 5380 status = led_get_status(i); 5381 if (status < 0) 5382 return -EIO; 5383 seq_printf(m, "%d:\t\t%s\n", 5384 i, str_led_status(status)); 5385 } 5386 } 5387 5388 seq_printf(m, "commands:\t" 5389 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5390 5391 return 0; 5392 } 5393 5394 static int led_write(char *buf) 5395 { 5396 char *cmd; 5397 int led, rc; 5398 enum led_status_t s; 5399 5400 if (!led_supported) 5401 return -ENODEV; 5402 5403 while ((cmd = next_cmd(&buf))) { 5404 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15) 5405 return -EINVAL; 5406 5407 if (strstr(cmd, "off")) { 5408 s = TPACPI_LED_OFF; 5409 } else if (strstr(cmd, "on")) { 5410 s = TPACPI_LED_ON; 5411 } else if (strstr(cmd, "blink")) { 5412 s = TPACPI_LED_BLINK; 5413 } else { 5414 return -EINVAL; 5415 } 5416 5417 rc = led_set_status(led, s); 5418 if (rc < 0) 5419 return rc; 5420 } 5421 5422 return 0; 5423 } 5424 5425 static struct ibm_struct led_driver_data = { 5426 .name = "led", 5427 .read = led_read, 5428 .write = led_write, 5429 .exit = led_exit, 5430 }; 5431 5432 /************************************************************************* 5433 * Beep subdriver 5434 */ 5435 5436 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5437 5438 #define TPACPI_BEEP_Q1 0x0001 5439 5440 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5441 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5442 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5443 }; 5444 5445 static int __init beep_init(struct ibm_init_struct *iibm) 5446 { 5447 unsigned long quirks; 5448 5449 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5450 5451 TPACPI_ACPIHANDLE_INIT(beep); 5452 5453 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5454 str_supported(beep_handle != NULL)); 5455 5456 quirks = tpacpi_check_quirks(beep_quirk_table, 5457 ARRAY_SIZE(beep_quirk_table)); 5458 5459 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5460 5461 return (beep_handle)? 0 : 1; 5462 } 5463 5464 static int beep_read(struct seq_file *m) 5465 { 5466 if (!beep_handle) 5467 seq_printf(m, "status:\t\tnot supported\n"); 5468 else { 5469 seq_printf(m, "status:\t\tsupported\n"); 5470 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5471 } 5472 5473 return 0; 5474 } 5475 5476 static int beep_write(char *buf) 5477 { 5478 char *cmd; 5479 int beep_cmd; 5480 5481 if (!beep_handle) 5482 return -ENODEV; 5483 5484 while ((cmd = next_cmd(&buf))) { 5485 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 5486 beep_cmd >= 0 && beep_cmd <= 17) { 5487 /* beep_cmd set */ 5488 } else 5489 return -EINVAL; 5490 if (tp_features.beep_needs_two_args) { 5491 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 5492 beep_cmd, 0)) 5493 return -EIO; 5494 } else { 5495 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 5496 beep_cmd)) 5497 return -EIO; 5498 } 5499 } 5500 5501 return 0; 5502 } 5503 5504 static struct ibm_struct beep_driver_data = { 5505 .name = "beep", 5506 .read = beep_read, 5507 .write = beep_write, 5508 }; 5509 5510 /************************************************************************* 5511 * Thermal subdriver 5512 */ 5513 5514 enum thermal_access_mode { 5515 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 5516 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 5517 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 5518 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 5519 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 5520 }; 5521 5522 enum { /* TPACPI_THERMAL_TPEC_* */ 5523 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 5524 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 5525 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 5526 5527 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 5528 }; 5529 5530 5531 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 5532 struct ibm_thermal_sensors_struct { 5533 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 5534 }; 5535 5536 static enum thermal_access_mode thermal_read_mode; 5537 5538 /* idx is zero-based */ 5539 static int thermal_get_sensor(int idx, s32 *value) 5540 { 5541 int t; 5542 s8 tmp; 5543 char tmpi[5]; 5544 5545 t = TP_EC_THERMAL_TMP0; 5546 5547 switch (thermal_read_mode) { 5548 #if TPACPI_MAX_THERMAL_SENSORS >= 16 5549 case TPACPI_THERMAL_TPEC_16: 5550 if (idx >= 8 && idx <= 15) { 5551 t = TP_EC_THERMAL_TMP8; 5552 idx -= 8; 5553 } 5554 /* fallthrough */ 5555 #endif 5556 case TPACPI_THERMAL_TPEC_8: 5557 if (idx <= 7) { 5558 if (!acpi_ec_read(t + idx, &tmp)) 5559 return -EIO; 5560 *value = tmp * 1000; 5561 return 0; 5562 } 5563 break; 5564 5565 case TPACPI_THERMAL_ACPI_UPDT: 5566 if (idx <= 7) { 5567 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5568 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 5569 return -EIO; 5570 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5571 return -EIO; 5572 *value = (t - 2732) * 100; 5573 return 0; 5574 } 5575 break; 5576 5577 case TPACPI_THERMAL_ACPI_TMP07: 5578 if (idx <= 7) { 5579 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5580 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5581 return -EIO; 5582 if (t > 127 || t < -127) 5583 t = TP_EC_THERMAL_TMP_NA; 5584 *value = t * 1000; 5585 return 0; 5586 } 5587 break; 5588 5589 case TPACPI_THERMAL_NONE: 5590 default: 5591 return -ENOSYS; 5592 } 5593 5594 return -EINVAL; 5595 } 5596 5597 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 5598 { 5599 int res, i; 5600 int n; 5601 5602 n = 8; 5603 i = 0; 5604 5605 if (!s) 5606 return -EINVAL; 5607 5608 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 5609 n = 16; 5610 5611 for (i = 0 ; i < n; i++) { 5612 res = thermal_get_sensor(i, &s->temp[i]); 5613 if (res) 5614 return res; 5615 } 5616 5617 return n; 5618 } 5619 5620 static void thermal_dump_all_sensors(void) 5621 { 5622 int n, i; 5623 struct ibm_thermal_sensors_struct t; 5624 5625 n = thermal_get_sensors(&t); 5626 if (n <= 0) 5627 return; 5628 5629 pr_notice("temperatures (Celsius):"); 5630 5631 for (i = 0; i < n; i++) { 5632 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 5633 pr_cont(" %d", (int)(t.temp[i] / 1000)); 5634 else 5635 pr_cont(" N/A"); 5636 } 5637 5638 pr_cont("\n"); 5639 } 5640 5641 /* sysfs temp##_input -------------------------------------------------- */ 5642 5643 static ssize_t thermal_temp_input_show(struct device *dev, 5644 struct device_attribute *attr, 5645 char *buf) 5646 { 5647 struct sensor_device_attribute *sensor_attr = 5648 to_sensor_dev_attr(attr); 5649 int idx = sensor_attr->index; 5650 s32 value; 5651 int res; 5652 5653 res = thermal_get_sensor(idx, &value); 5654 if (res) 5655 return res; 5656 if (value == TPACPI_THERMAL_SENSOR_NA) 5657 return -ENXIO; 5658 5659 return snprintf(buf, PAGE_SIZE, "%d\n", value); 5660 } 5661 5662 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 5663 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 5664 thermal_temp_input_show, NULL, _idxB) 5665 5666 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 5667 THERMAL_SENSOR_ATTR_TEMP(1, 0), 5668 THERMAL_SENSOR_ATTR_TEMP(2, 1), 5669 THERMAL_SENSOR_ATTR_TEMP(3, 2), 5670 THERMAL_SENSOR_ATTR_TEMP(4, 3), 5671 THERMAL_SENSOR_ATTR_TEMP(5, 4), 5672 THERMAL_SENSOR_ATTR_TEMP(6, 5), 5673 THERMAL_SENSOR_ATTR_TEMP(7, 6), 5674 THERMAL_SENSOR_ATTR_TEMP(8, 7), 5675 THERMAL_SENSOR_ATTR_TEMP(9, 8), 5676 THERMAL_SENSOR_ATTR_TEMP(10, 9), 5677 THERMAL_SENSOR_ATTR_TEMP(11, 10), 5678 THERMAL_SENSOR_ATTR_TEMP(12, 11), 5679 THERMAL_SENSOR_ATTR_TEMP(13, 12), 5680 THERMAL_SENSOR_ATTR_TEMP(14, 13), 5681 THERMAL_SENSOR_ATTR_TEMP(15, 14), 5682 THERMAL_SENSOR_ATTR_TEMP(16, 15), 5683 }; 5684 5685 #define THERMAL_ATTRS(X) \ 5686 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 5687 5688 static struct attribute *thermal_temp_input_attr[] = { 5689 THERMAL_ATTRS(8), 5690 THERMAL_ATTRS(9), 5691 THERMAL_ATTRS(10), 5692 THERMAL_ATTRS(11), 5693 THERMAL_ATTRS(12), 5694 THERMAL_ATTRS(13), 5695 THERMAL_ATTRS(14), 5696 THERMAL_ATTRS(15), 5697 THERMAL_ATTRS(0), 5698 THERMAL_ATTRS(1), 5699 THERMAL_ATTRS(2), 5700 THERMAL_ATTRS(3), 5701 THERMAL_ATTRS(4), 5702 THERMAL_ATTRS(5), 5703 THERMAL_ATTRS(6), 5704 THERMAL_ATTRS(7), 5705 NULL 5706 }; 5707 5708 static const struct attribute_group thermal_temp_input16_group = { 5709 .attrs = thermal_temp_input_attr 5710 }; 5711 5712 static const struct attribute_group thermal_temp_input8_group = { 5713 .attrs = &thermal_temp_input_attr[8] 5714 }; 5715 5716 #undef THERMAL_SENSOR_ATTR_TEMP 5717 #undef THERMAL_ATTRS 5718 5719 /* --------------------------------------------------------------------- */ 5720 5721 static int __init thermal_init(struct ibm_init_struct *iibm) 5722 { 5723 u8 t, ta1, ta2; 5724 int i; 5725 int acpi_tmp7; 5726 int res; 5727 5728 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 5729 5730 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 5731 5732 if (thinkpad_id.ec_model) { 5733 /* 5734 * Direct EC access mode: sensors at registers 5735 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 5736 * non-implemented, thermal sensors return 0x80 when 5737 * not available 5738 */ 5739 5740 ta1 = ta2 = 0; 5741 for (i = 0; i < 8; i++) { 5742 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 5743 ta1 |= t; 5744 } else { 5745 ta1 = 0; 5746 break; 5747 } 5748 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 5749 ta2 |= t; 5750 } else { 5751 ta1 = 0; 5752 break; 5753 } 5754 } 5755 if (ta1 == 0) { 5756 /* This is sheer paranoia, but we handle it anyway */ 5757 if (acpi_tmp7) { 5758 pr_err("ThinkPad ACPI EC access misbehaving, " 5759 "falling back to ACPI TMPx access " 5760 "mode\n"); 5761 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5762 } else { 5763 pr_err("ThinkPad ACPI EC access misbehaving, " 5764 "disabling thermal sensors access\n"); 5765 thermal_read_mode = TPACPI_THERMAL_NONE; 5766 } 5767 } else { 5768 thermal_read_mode = 5769 (ta2 != 0) ? 5770 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 5771 } 5772 } else if (acpi_tmp7) { 5773 if (tpacpi_is_ibm() && 5774 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 5775 /* 600e/x, 770e, 770x */ 5776 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 5777 } else { 5778 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 5779 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5780 } 5781 } else { 5782 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 5783 thermal_read_mode = TPACPI_THERMAL_NONE; 5784 } 5785 5786 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 5787 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 5788 thermal_read_mode); 5789 5790 switch (thermal_read_mode) { 5791 case TPACPI_THERMAL_TPEC_16: 5792 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5793 &thermal_temp_input16_group); 5794 if (res) 5795 return res; 5796 break; 5797 case TPACPI_THERMAL_TPEC_8: 5798 case TPACPI_THERMAL_ACPI_TMP07: 5799 case TPACPI_THERMAL_ACPI_UPDT: 5800 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5801 &thermal_temp_input8_group); 5802 if (res) 5803 return res; 5804 break; 5805 case TPACPI_THERMAL_NONE: 5806 default: 5807 return 1; 5808 } 5809 5810 return 0; 5811 } 5812 5813 static void thermal_exit(void) 5814 { 5815 switch (thermal_read_mode) { 5816 case TPACPI_THERMAL_TPEC_16: 5817 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5818 &thermal_temp_input16_group); 5819 break; 5820 case TPACPI_THERMAL_TPEC_8: 5821 case TPACPI_THERMAL_ACPI_TMP07: 5822 case TPACPI_THERMAL_ACPI_UPDT: 5823 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5824 &thermal_temp_input8_group); 5825 break; 5826 case TPACPI_THERMAL_NONE: 5827 default: 5828 break; 5829 } 5830 } 5831 5832 static int thermal_read(struct seq_file *m) 5833 { 5834 int n, i; 5835 struct ibm_thermal_sensors_struct t; 5836 5837 n = thermal_get_sensors(&t); 5838 if (unlikely(n < 0)) 5839 return n; 5840 5841 seq_printf(m, "temperatures:\t"); 5842 5843 if (n > 0) { 5844 for (i = 0; i < (n - 1); i++) 5845 seq_printf(m, "%d ", t.temp[i] / 1000); 5846 seq_printf(m, "%d\n", t.temp[i] / 1000); 5847 } else 5848 seq_printf(m, "not supported\n"); 5849 5850 return 0; 5851 } 5852 5853 static struct ibm_struct thermal_driver_data = { 5854 .name = "thermal", 5855 .read = thermal_read, 5856 .exit = thermal_exit, 5857 }; 5858 5859 /************************************************************************* 5860 * Backlight/brightness subdriver 5861 */ 5862 5863 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 5864 5865 /* 5866 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 5867 * CMOS NVRAM byte 0x5E, bits 0-3. 5868 * 5869 * EC HBRV (0x31) has the following layout 5870 * Bit 7: unknown function 5871 * Bit 6: unknown function 5872 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 5873 * Bit 4: must be set to zero to avoid problems 5874 * Bit 3-0: backlight brightness level 5875 * 5876 * brightness_get_raw returns status data in the HBRV layout 5877 * 5878 * WARNING: The X61 has been verified to use HBRV for something else, so 5879 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 5880 * testing on the very early *60 Lenovo models... 5881 */ 5882 5883 enum { 5884 TP_EC_BACKLIGHT = 0x31, 5885 5886 /* TP_EC_BACKLIGHT bitmasks */ 5887 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 5888 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 5889 TP_EC_BACKLIGHT_MAPSW = 0x20, 5890 }; 5891 5892 enum tpacpi_brightness_access_mode { 5893 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 5894 TPACPI_BRGHT_MODE_EC, /* EC control */ 5895 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 5896 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 5897 TPACPI_BRGHT_MODE_MAX 5898 }; 5899 5900 static struct backlight_device *ibm_backlight_device; 5901 5902 static enum tpacpi_brightness_access_mode brightness_mode = 5903 TPACPI_BRGHT_MODE_MAX; 5904 5905 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 5906 5907 static struct mutex brightness_mutex; 5908 5909 /* NVRAM brightness access, 5910 * call with brightness_mutex held! */ 5911 static unsigned int tpacpi_brightness_nvram_get(void) 5912 { 5913 u8 lnvram; 5914 5915 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 5916 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5917 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 5918 lnvram &= bright_maxlvl; 5919 5920 return lnvram; 5921 } 5922 5923 static void tpacpi_brightness_checkpoint_nvram(void) 5924 { 5925 u8 lec = 0; 5926 u8 b_nvram; 5927 5928 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 5929 return; 5930 5931 vdbg_printk(TPACPI_DBG_BRGHT, 5932 "trying to checkpoint backlight level to NVRAM...\n"); 5933 5934 if (mutex_lock_killable(&brightness_mutex) < 0) 5935 return; 5936 5937 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5938 goto unlock; 5939 lec &= TP_EC_BACKLIGHT_LVLMSK; 5940 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 5941 5942 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5943 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 5944 /* NVRAM needs update */ 5945 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 5946 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 5947 b_nvram |= lec; 5948 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 5949 dbg_printk(TPACPI_DBG_BRGHT, 5950 "updated NVRAM backlight level to %u (0x%02x)\n", 5951 (unsigned int) lec, (unsigned int) b_nvram); 5952 } else 5953 vdbg_printk(TPACPI_DBG_BRGHT, 5954 "NVRAM backlight level already is %u (0x%02x)\n", 5955 (unsigned int) lec, (unsigned int) b_nvram); 5956 5957 unlock: 5958 mutex_unlock(&brightness_mutex); 5959 } 5960 5961 5962 /* call with brightness_mutex held! */ 5963 static int tpacpi_brightness_get_raw(int *status) 5964 { 5965 u8 lec = 0; 5966 5967 switch (brightness_mode) { 5968 case TPACPI_BRGHT_MODE_UCMS_STEP: 5969 *status = tpacpi_brightness_nvram_get(); 5970 return 0; 5971 case TPACPI_BRGHT_MODE_EC: 5972 case TPACPI_BRGHT_MODE_ECNVRAM: 5973 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5974 return -EIO; 5975 *status = lec; 5976 return 0; 5977 default: 5978 return -ENXIO; 5979 } 5980 } 5981 5982 /* call with brightness_mutex held! */ 5983 /* do NOT call with illegal backlight level value */ 5984 static int tpacpi_brightness_set_ec(unsigned int value) 5985 { 5986 u8 lec = 0; 5987 5988 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5989 return -EIO; 5990 5991 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 5992 (lec & TP_EC_BACKLIGHT_CMDMSK) | 5993 (value & TP_EC_BACKLIGHT_LVLMSK)))) 5994 return -EIO; 5995 5996 return 0; 5997 } 5998 5999 /* call with brightness_mutex held! */ 6000 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6001 { 6002 int cmos_cmd, inc; 6003 unsigned int current_value, i; 6004 6005 current_value = tpacpi_brightness_nvram_get(); 6006 6007 if (value == current_value) 6008 return 0; 6009 6010 cmos_cmd = (value > current_value) ? 6011 TP_CMOS_BRIGHTNESS_UP : 6012 TP_CMOS_BRIGHTNESS_DOWN; 6013 inc = (value > current_value) ? 1 : -1; 6014 6015 for (i = current_value; i != value; i += inc) 6016 if (issue_thinkpad_cmos_command(cmos_cmd)) 6017 return -EIO; 6018 6019 return 0; 6020 } 6021 6022 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6023 static int brightness_set(unsigned int value) 6024 { 6025 int res; 6026 6027 if (value > bright_maxlvl || value < 0) 6028 return -EINVAL; 6029 6030 vdbg_printk(TPACPI_DBG_BRGHT, 6031 "set backlight level to %d\n", value); 6032 6033 res = mutex_lock_killable(&brightness_mutex); 6034 if (res < 0) 6035 return res; 6036 6037 switch (brightness_mode) { 6038 case TPACPI_BRGHT_MODE_EC: 6039 case TPACPI_BRGHT_MODE_ECNVRAM: 6040 res = tpacpi_brightness_set_ec(value); 6041 break; 6042 case TPACPI_BRGHT_MODE_UCMS_STEP: 6043 res = tpacpi_brightness_set_ucmsstep(value); 6044 break; 6045 default: 6046 res = -ENXIO; 6047 } 6048 6049 mutex_unlock(&brightness_mutex); 6050 return res; 6051 } 6052 6053 /* sysfs backlight class ----------------------------------------------- */ 6054 6055 static int brightness_update_status(struct backlight_device *bd) 6056 { 6057 unsigned int level = 6058 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6059 bd->props.power == FB_BLANK_UNBLANK) ? 6060 bd->props.brightness : 0; 6061 6062 dbg_printk(TPACPI_DBG_BRGHT, 6063 "backlight: attempt to set level to %d\n", 6064 level); 6065 6066 /* it is the backlight class's job (caller) to handle 6067 * EINTR and other errors properly */ 6068 return brightness_set(level); 6069 } 6070 6071 static int brightness_get(struct backlight_device *bd) 6072 { 6073 int status, res; 6074 6075 res = mutex_lock_killable(&brightness_mutex); 6076 if (res < 0) 6077 return 0; 6078 6079 res = tpacpi_brightness_get_raw(&status); 6080 6081 mutex_unlock(&brightness_mutex); 6082 6083 if (res < 0) 6084 return 0; 6085 6086 return status & TP_EC_BACKLIGHT_LVLMSK; 6087 } 6088 6089 static void tpacpi_brightness_notify_change(void) 6090 { 6091 backlight_force_update(ibm_backlight_device, 6092 BACKLIGHT_UPDATE_HOTKEY); 6093 } 6094 6095 static const struct backlight_ops ibm_backlight_data = { 6096 .get_brightness = brightness_get, 6097 .update_status = brightness_update_status, 6098 }; 6099 6100 /* --------------------------------------------------------------------- */ 6101 6102 /* 6103 * Call _BCL method of video device. On some ThinkPads this will 6104 * switch the firmware to the ACPI brightness control mode. 6105 */ 6106 6107 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6108 { 6109 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6110 union acpi_object *obj; 6111 int rc; 6112 6113 if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) { 6114 obj = (union acpi_object *)buffer.pointer; 6115 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6116 pr_err("Unknown _BCL data, please report this to %s\n", 6117 TPACPI_MAIL); 6118 rc = 0; 6119 } else { 6120 rc = obj->package.count; 6121 } 6122 } else { 6123 return 0; 6124 } 6125 6126 kfree(buffer.pointer); 6127 return rc; 6128 } 6129 6130 6131 /* 6132 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6133 */ 6134 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6135 { 6136 acpi_handle video_device; 6137 int bcl_levels = 0; 6138 6139 tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device); 6140 if (video_device) 6141 bcl_levels = tpacpi_query_bcl_levels(video_device); 6142 6143 tp_features.bright_acpimode = (bcl_levels > 0); 6144 6145 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6146 } 6147 6148 /* 6149 * These are only useful for models that have only one possibility 6150 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6151 * these quirks. 6152 */ 6153 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6154 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6155 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6156 6157 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6158 /* Models with ATI GPUs known to require ECNVRAM mode */ 6159 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6160 6161 /* Models with ATI GPUs that can use ECNVRAM */ 6162 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6163 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6164 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6165 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6166 6167 /* Models with Intel Extreme Graphics 2 */ 6168 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6169 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6170 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6171 6172 /* Models with Intel GMA900 */ 6173 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6174 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6175 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6176 }; 6177 6178 /* 6179 * Returns < 0 for error, otherwise sets tp_features.bright_* 6180 * and bright_maxlvl. 6181 */ 6182 static void __init tpacpi_detect_brightness_capabilities(void) 6183 { 6184 unsigned int b; 6185 6186 vdbg_printk(TPACPI_DBG_INIT, 6187 "detecting firmware brightness interface capabilities\n"); 6188 6189 /* we could run a quirks check here (same table used by 6190 * brightness_init) if needed */ 6191 6192 /* 6193 * We always attempt to detect acpi support, so as to switch 6194 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6195 * going to publish a backlight interface 6196 */ 6197 b = tpacpi_check_std_acpi_brightness_support(); 6198 switch (b) { 6199 case 16: 6200 bright_maxlvl = 15; 6201 pr_info("detected a 16-level brightness capable ThinkPad\n"); 6202 break; 6203 case 8: 6204 case 0: 6205 bright_maxlvl = 7; 6206 pr_info("detected a 8-level brightness capable ThinkPad\n"); 6207 break; 6208 default: 6209 pr_err("Unsupported brightness interface, " 6210 "please contact %s\n", TPACPI_MAIL); 6211 tp_features.bright_unkfw = 1; 6212 bright_maxlvl = b - 1; 6213 } 6214 } 6215 6216 static int __init brightness_init(struct ibm_init_struct *iibm) 6217 { 6218 struct backlight_properties props; 6219 int b; 6220 unsigned long quirks; 6221 6222 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6223 6224 mutex_init(&brightness_mutex); 6225 6226 quirks = tpacpi_check_quirks(brightness_quirk_table, 6227 ARRAY_SIZE(brightness_quirk_table)); 6228 6229 /* tpacpi_detect_brightness_capabilities() must have run already */ 6230 6231 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6232 if (tp_features.bright_unkfw) 6233 return 1; 6234 6235 if (!brightness_enable) { 6236 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6237 "brightness support disabled by " 6238 "module parameter\n"); 6239 return 1; 6240 } 6241 6242 if (acpi_video_backlight_support()) { 6243 if (brightness_enable > 1) { 6244 pr_info("Standard ACPI backlight interface " 6245 "available, not loading native one\n"); 6246 return 1; 6247 } else if (brightness_enable == 1) { 6248 pr_warn("Cannot enable backlight brightness support, " 6249 "ACPI is already handling it. Refer to the " 6250 "acpi_backlight kernel parameter.\n"); 6251 return 1; 6252 } 6253 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6254 pr_notice("Standard ACPI backlight interface not " 6255 "available, thinkpad_acpi native " 6256 "brightness control enabled\n"); 6257 } 6258 6259 /* 6260 * Check for module parameter bogosity, note that we 6261 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6262 * able to detect "unspecified" 6263 */ 6264 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6265 return -EINVAL; 6266 6267 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6268 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6269 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6270 if (quirks & TPACPI_BRGHT_Q_EC) 6271 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6272 else 6273 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6274 6275 dbg_printk(TPACPI_DBG_BRGHT, 6276 "driver auto-selected brightness_mode=%d\n", 6277 brightness_mode); 6278 } 6279 6280 /* Safety */ 6281 if (!tpacpi_is_ibm() && 6282 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6283 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6284 return -EINVAL; 6285 6286 if (tpacpi_brightness_get_raw(&b) < 0) 6287 return 1; 6288 6289 memset(&props, 0, sizeof(struct backlight_properties)); 6290 props.type = BACKLIGHT_PLATFORM; 6291 props.max_brightness = bright_maxlvl; 6292 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6293 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6294 NULL, NULL, 6295 &ibm_backlight_data, 6296 &props); 6297 if (IS_ERR(ibm_backlight_device)) { 6298 int rc = PTR_ERR(ibm_backlight_device); 6299 ibm_backlight_device = NULL; 6300 pr_err("Could not register backlight device\n"); 6301 return rc; 6302 } 6303 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6304 "brightness is supported\n"); 6305 6306 if (quirks & TPACPI_BRGHT_Q_ASK) { 6307 pr_notice("brightness: will use unverified default: " 6308 "brightness_mode=%d\n", brightness_mode); 6309 pr_notice("brightness: please report to %s whether it works well " 6310 "or not on your ThinkPad\n", TPACPI_MAIL); 6311 } 6312 6313 /* Added by mistake in early 2007. Probably useless, but it could 6314 * be working around some unknown firmware problem where the value 6315 * read at startup doesn't match the real hardware state... so leave 6316 * it in place just in case */ 6317 backlight_update_status(ibm_backlight_device); 6318 6319 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6320 "brightness: registering brightness hotkeys " 6321 "as change notification\n"); 6322 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6323 | TP_ACPI_HKEY_BRGHTUP_MASK 6324 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6325 return 0; 6326 } 6327 6328 static void brightness_suspend(void) 6329 { 6330 tpacpi_brightness_checkpoint_nvram(); 6331 } 6332 6333 static void brightness_shutdown(void) 6334 { 6335 tpacpi_brightness_checkpoint_nvram(); 6336 } 6337 6338 static void brightness_exit(void) 6339 { 6340 if (ibm_backlight_device) { 6341 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6342 "calling backlight_device_unregister()\n"); 6343 backlight_device_unregister(ibm_backlight_device); 6344 } 6345 6346 tpacpi_brightness_checkpoint_nvram(); 6347 } 6348 6349 static int brightness_read(struct seq_file *m) 6350 { 6351 int level; 6352 6353 level = brightness_get(NULL); 6354 if (level < 0) { 6355 seq_printf(m, "level:\t\tunreadable\n"); 6356 } else { 6357 seq_printf(m, "level:\t\t%d\n", level); 6358 seq_printf(m, "commands:\tup, down\n"); 6359 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6360 bright_maxlvl); 6361 } 6362 6363 return 0; 6364 } 6365 6366 static int brightness_write(char *buf) 6367 { 6368 int level; 6369 int rc; 6370 char *cmd; 6371 6372 level = brightness_get(NULL); 6373 if (level < 0) 6374 return level; 6375 6376 while ((cmd = next_cmd(&buf))) { 6377 if (strlencmp(cmd, "up") == 0) { 6378 if (level < bright_maxlvl) 6379 level++; 6380 } else if (strlencmp(cmd, "down") == 0) { 6381 if (level > 0) 6382 level--; 6383 } else if (sscanf(cmd, "level %d", &level) == 1 && 6384 level >= 0 && level <= bright_maxlvl) { 6385 /* new level set */ 6386 } else 6387 return -EINVAL; 6388 } 6389 6390 tpacpi_disclose_usertask("procfs brightness", 6391 "set level to %d\n", level); 6392 6393 /* 6394 * Now we know what the final level should be, so we try to set it. 6395 * Doing it this way makes the syscall restartable in case of EINTR 6396 */ 6397 rc = brightness_set(level); 6398 if (!rc && ibm_backlight_device) 6399 backlight_force_update(ibm_backlight_device, 6400 BACKLIGHT_UPDATE_SYSFS); 6401 return (rc == -EINTR)? -ERESTARTSYS : rc; 6402 } 6403 6404 static struct ibm_struct brightness_driver_data = { 6405 .name = "brightness", 6406 .read = brightness_read, 6407 .write = brightness_write, 6408 .exit = brightness_exit, 6409 .suspend = brightness_suspend, 6410 .shutdown = brightness_shutdown, 6411 }; 6412 6413 /************************************************************************* 6414 * Volume subdriver 6415 */ 6416 6417 /* 6418 * IBM ThinkPads have a simple volume controller with MUTE gating. 6419 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 6420 * 6421 * Since the *61 series (and probably also the later *60 series), Lenovo 6422 * ThinkPads only implement the MUTE gate. 6423 * 6424 * EC register 0x30 6425 * Bit 6: MUTE (1 mutes sound) 6426 * Bit 3-0: Volume 6427 * Other bits should be zero as far as we know. 6428 * 6429 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 6430 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 6431 * such as bit 7 which is used to detect repeated presses of MUTE, 6432 * and we leave them unchanged. 6433 */ 6434 6435 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 6436 6437 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 6438 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 6439 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 6440 6441 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */ 6442 static char *alsa_id = "ThinkPadEC"; 6443 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 6444 6445 struct tpacpi_alsa_data { 6446 struct snd_card *card; 6447 struct snd_ctl_elem_id *ctl_mute_id; 6448 struct snd_ctl_elem_id *ctl_vol_id; 6449 }; 6450 6451 static struct snd_card *alsa_card; 6452 6453 enum { 6454 TP_EC_AUDIO = 0x30, 6455 6456 /* TP_EC_AUDIO bits */ 6457 TP_EC_AUDIO_MUTESW = 6, 6458 6459 /* TP_EC_AUDIO bitmasks */ 6460 TP_EC_AUDIO_LVL_MSK = 0x0F, 6461 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 6462 6463 /* Maximum volume */ 6464 TP_EC_VOLUME_MAX = 14, 6465 }; 6466 6467 enum tpacpi_volume_access_mode { 6468 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 6469 TPACPI_VOL_MODE_EC, /* Pure EC control */ 6470 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 6471 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6472 TPACPI_VOL_MODE_MAX 6473 }; 6474 6475 enum tpacpi_volume_capabilities { 6476 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 6477 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 6478 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 6479 TPACPI_VOL_CAP_MAX 6480 }; 6481 6482 static enum tpacpi_volume_access_mode volume_mode = 6483 TPACPI_VOL_MODE_MAX; 6484 6485 static enum tpacpi_volume_capabilities volume_capabilities; 6486 static bool volume_control_allowed; 6487 6488 /* 6489 * Used to syncronize writers to TP_EC_AUDIO and 6490 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 6491 */ 6492 static struct mutex volume_mutex; 6493 6494 static void tpacpi_volume_checkpoint_nvram(void) 6495 { 6496 u8 lec = 0; 6497 u8 b_nvram; 6498 u8 ec_mask; 6499 6500 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 6501 return; 6502 if (!volume_control_allowed) 6503 return; 6504 6505 vdbg_printk(TPACPI_DBG_MIXER, 6506 "trying to checkpoint mixer state to NVRAM...\n"); 6507 6508 if (tp_features.mixer_no_level_control) 6509 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 6510 else 6511 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 6512 6513 if (mutex_lock_killable(&volume_mutex) < 0) 6514 return; 6515 6516 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 6517 goto unlock; 6518 lec &= ec_mask; 6519 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 6520 6521 if (lec != (b_nvram & ec_mask)) { 6522 /* NVRAM needs update */ 6523 b_nvram &= ~ec_mask; 6524 b_nvram |= lec; 6525 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 6526 dbg_printk(TPACPI_DBG_MIXER, 6527 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 6528 (unsigned int) lec, (unsigned int) b_nvram); 6529 } else { 6530 vdbg_printk(TPACPI_DBG_MIXER, 6531 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 6532 (unsigned int) lec, (unsigned int) b_nvram); 6533 } 6534 6535 unlock: 6536 mutex_unlock(&volume_mutex); 6537 } 6538 6539 static int volume_get_status_ec(u8 *status) 6540 { 6541 u8 s; 6542 6543 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 6544 return -EIO; 6545 6546 *status = s; 6547 6548 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 6549 6550 return 0; 6551 } 6552 6553 static int volume_get_status(u8 *status) 6554 { 6555 return volume_get_status_ec(status); 6556 } 6557 6558 static int volume_set_status_ec(const u8 status) 6559 { 6560 if (!acpi_ec_write(TP_EC_AUDIO, status)) 6561 return -EIO; 6562 6563 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 6564 6565 return 0; 6566 } 6567 6568 static int volume_set_status(const u8 status) 6569 { 6570 return volume_set_status_ec(status); 6571 } 6572 6573 /* returns < 0 on error, 0 on no change, 1 on change */ 6574 static int __volume_set_mute_ec(const bool mute) 6575 { 6576 int rc; 6577 u8 s, n; 6578 6579 if (mutex_lock_killable(&volume_mutex) < 0) 6580 return -EINTR; 6581 6582 rc = volume_get_status_ec(&s); 6583 if (rc) 6584 goto unlock; 6585 6586 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 6587 s & ~TP_EC_AUDIO_MUTESW_MSK; 6588 6589 if (n != s) { 6590 rc = volume_set_status_ec(n); 6591 if (!rc) 6592 rc = 1; 6593 } 6594 6595 unlock: 6596 mutex_unlock(&volume_mutex); 6597 return rc; 6598 } 6599 6600 static int volume_alsa_set_mute(const bool mute) 6601 { 6602 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 6603 (mute) ? "" : "un"); 6604 return __volume_set_mute_ec(mute); 6605 } 6606 6607 static int volume_set_mute(const bool mute) 6608 { 6609 int rc; 6610 6611 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 6612 (mute) ? "" : "un"); 6613 6614 rc = __volume_set_mute_ec(mute); 6615 return (rc < 0) ? rc : 0; 6616 } 6617 6618 /* returns < 0 on error, 0 on no change, 1 on change */ 6619 static int __volume_set_volume_ec(const u8 vol) 6620 { 6621 int rc; 6622 u8 s, n; 6623 6624 if (vol > TP_EC_VOLUME_MAX) 6625 return -EINVAL; 6626 6627 if (mutex_lock_killable(&volume_mutex) < 0) 6628 return -EINTR; 6629 6630 rc = volume_get_status_ec(&s); 6631 if (rc) 6632 goto unlock; 6633 6634 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 6635 6636 if (n != s) { 6637 rc = volume_set_status_ec(n); 6638 if (!rc) 6639 rc = 1; 6640 } 6641 6642 unlock: 6643 mutex_unlock(&volume_mutex); 6644 return rc; 6645 } 6646 6647 static int volume_alsa_set_volume(const u8 vol) 6648 { 6649 dbg_printk(TPACPI_DBG_MIXER, 6650 "ALSA: trying to set volume level to %hu\n", vol); 6651 return __volume_set_volume_ec(vol); 6652 } 6653 6654 static void volume_alsa_notify_change(void) 6655 { 6656 struct tpacpi_alsa_data *d; 6657 6658 if (alsa_card && alsa_card->private_data) { 6659 d = alsa_card->private_data; 6660 if (d->ctl_mute_id) 6661 snd_ctl_notify(alsa_card, 6662 SNDRV_CTL_EVENT_MASK_VALUE, 6663 d->ctl_mute_id); 6664 if (d->ctl_vol_id) 6665 snd_ctl_notify(alsa_card, 6666 SNDRV_CTL_EVENT_MASK_VALUE, 6667 d->ctl_vol_id); 6668 } 6669 } 6670 6671 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 6672 struct snd_ctl_elem_info *uinfo) 6673 { 6674 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 6675 uinfo->count = 1; 6676 uinfo->value.integer.min = 0; 6677 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 6678 return 0; 6679 } 6680 6681 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 6682 struct snd_ctl_elem_value *ucontrol) 6683 { 6684 u8 s; 6685 int rc; 6686 6687 rc = volume_get_status(&s); 6688 if (rc < 0) 6689 return rc; 6690 6691 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 6692 return 0; 6693 } 6694 6695 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 6696 struct snd_ctl_elem_value *ucontrol) 6697 { 6698 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 6699 ucontrol->value.integer.value[0]); 6700 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 6701 } 6702 6703 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 6704 6705 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 6706 struct snd_ctl_elem_value *ucontrol) 6707 { 6708 u8 s; 6709 int rc; 6710 6711 rc = volume_get_status(&s); 6712 if (rc < 0) 6713 return rc; 6714 6715 ucontrol->value.integer.value[0] = 6716 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 6717 return 0; 6718 } 6719 6720 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 6721 struct snd_ctl_elem_value *ucontrol) 6722 { 6723 tpacpi_disclose_usertask("ALSA", "%smute\n", 6724 ucontrol->value.integer.value[0] ? 6725 "un" : ""); 6726 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 6727 } 6728 6729 static struct snd_kcontrol_new volume_alsa_control_vol = { 6730 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6731 .name = "Console Playback Volume", 6732 .index = 0, 6733 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6734 .info = volume_alsa_vol_info, 6735 .get = volume_alsa_vol_get, 6736 }; 6737 6738 static struct snd_kcontrol_new volume_alsa_control_mute = { 6739 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6740 .name = "Console Playback Switch", 6741 .index = 0, 6742 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6743 .info = volume_alsa_mute_info, 6744 .get = volume_alsa_mute_get, 6745 }; 6746 6747 static void volume_suspend(void) 6748 { 6749 tpacpi_volume_checkpoint_nvram(); 6750 } 6751 6752 static void volume_resume(void) 6753 { 6754 volume_alsa_notify_change(); 6755 } 6756 6757 static void volume_shutdown(void) 6758 { 6759 tpacpi_volume_checkpoint_nvram(); 6760 } 6761 6762 static void volume_exit(void) 6763 { 6764 if (alsa_card) { 6765 snd_card_free(alsa_card); 6766 alsa_card = NULL; 6767 } 6768 6769 tpacpi_volume_checkpoint_nvram(); 6770 } 6771 6772 static int __init volume_create_alsa_mixer(void) 6773 { 6774 struct snd_card *card; 6775 struct tpacpi_alsa_data *data; 6776 struct snd_kcontrol *ctl_vol; 6777 struct snd_kcontrol *ctl_mute; 6778 int rc; 6779 6780 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE, 6781 sizeof(struct tpacpi_alsa_data), &card); 6782 if (rc < 0 || !card) { 6783 pr_err("Failed to create ALSA card structures: %d\n", rc); 6784 return 1; 6785 } 6786 6787 BUG_ON(!card->private_data); 6788 data = card->private_data; 6789 data->card = card; 6790 6791 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 6792 sizeof(card->driver)); 6793 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 6794 sizeof(card->shortname)); 6795 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 6796 (thinkpad_id.ec_version_str) ? 6797 thinkpad_id.ec_version_str : "(unknown)"); 6798 snprintf(card->longname, sizeof(card->longname), 6799 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 6800 (thinkpad_id.ec_version_str) ? 6801 thinkpad_id.ec_version_str : "unknown"); 6802 6803 if (volume_control_allowed) { 6804 volume_alsa_control_vol.put = volume_alsa_vol_put; 6805 volume_alsa_control_vol.access = 6806 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6807 6808 volume_alsa_control_mute.put = volume_alsa_mute_put; 6809 volume_alsa_control_mute.access = 6810 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6811 } 6812 6813 if (!tp_features.mixer_no_level_control) { 6814 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 6815 rc = snd_ctl_add(card, ctl_vol); 6816 if (rc < 0) { 6817 pr_err("Failed to create ALSA volume control: %d\n", 6818 rc); 6819 goto err_exit; 6820 } 6821 data->ctl_vol_id = &ctl_vol->id; 6822 } 6823 6824 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 6825 rc = snd_ctl_add(card, ctl_mute); 6826 if (rc < 0) { 6827 pr_err("Failed to create ALSA mute control: %d\n", rc); 6828 goto err_exit; 6829 } 6830 data->ctl_mute_id = &ctl_mute->id; 6831 6832 snd_card_set_dev(card, &tpacpi_pdev->dev); 6833 rc = snd_card_register(card); 6834 if (rc < 0) { 6835 pr_err("Failed to register ALSA card: %d\n", rc); 6836 goto err_exit; 6837 } 6838 6839 alsa_card = card; 6840 return 0; 6841 6842 err_exit: 6843 snd_card_free(card); 6844 return 1; 6845 } 6846 6847 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 6848 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 6849 6850 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 6851 /* Whitelist volume level on all IBM by default */ 6852 { .vendor = PCI_VENDOR_ID_IBM, 6853 .bios = TPACPI_MATCH_ANY, 6854 .ec = TPACPI_MATCH_ANY, 6855 .quirks = TPACPI_VOL_Q_LEVEL }, 6856 6857 /* Lenovo models with volume control (needs confirmation) */ 6858 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 6859 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 6860 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 6861 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 6862 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 6863 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 6864 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 6865 6866 /* Whitelist mute-only on all Lenovo by default */ 6867 { .vendor = PCI_VENDOR_ID_LENOVO, 6868 .bios = TPACPI_MATCH_ANY, 6869 .ec = TPACPI_MATCH_ANY, 6870 .quirks = TPACPI_VOL_Q_MUTEONLY } 6871 }; 6872 6873 static int __init volume_init(struct ibm_init_struct *iibm) 6874 { 6875 unsigned long quirks; 6876 int rc; 6877 6878 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 6879 6880 mutex_init(&volume_mutex); 6881 6882 /* 6883 * Check for module parameter bogosity, note that we 6884 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 6885 * able to detect "unspecified" 6886 */ 6887 if (volume_mode > TPACPI_VOL_MODE_MAX) 6888 return -EINVAL; 6889 6890 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 6891 pr_err("UCMS step volume mode not implemented, " 6892 "please contact %s\n", TPACPI_MAIL); 6893 return 1; 6894 } 6895 6896 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 6897 return -EINVAL; 6898 6899 /* 6900 * The ALSA mixer is our primary interface. 6901 * When disabled, don't install the subdriver at all 6902 */ 6903 if (!alsa_enable) { 6904 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6905 "ALSA mixer disabled by parameter, " 6906 "not loading volume subdriver...\n"); 6907 return 1; 6908 } 6909 6910 quirks = tpacpi_check_quirks(volume_quirk_table, 6911 ARRAY_SIZE(volume_quirk_table)); 6912 6913 switch (volume_capabilities) { 6914 case TPACPI_VOL_CAP_AUTO: 6915 if (quirks & TPACPI_VOL_Q_MUTEONLY) 6916 tp_features.mixer_no_level_control = 1; 6917 else if (quirks & TPACPI_VOL_Q_LEVEL) 6918 tp_features.mixer_no_level_control = 0; 6919 else 6920 return 1; /* no mixer */ 6921 break; 6922 case TPACPI_VOL_CAP_VOLMUTE: 6923 tp_features.mixer_no_level_control = 0; 6924 break; 6925 case TPACPI_VOL_CAP_MUTEONLY: 6926 tp_features.mixer_no_level_control = 1; 6927 break; 6928 default: 6929 return 1; 6930 } 6931 6932 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 6933 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6934 "using user-supplied volume_capabilities=%d\n", 6935 volume_capabilities); 6936 6937 if (volume_mode == TPACPI_VOL_MODE_AUTO || 6938 volume_mode == TPACPI_VOL_MODE_MAX) { 6939 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 6940 6941 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6942 "driver auto-selected volume_mode=%d\n", 6943 volume_mode); 6944 } else { 6945 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6946 "using user-supplied volume_mode=%d\n", 6947 volume_mode); 6948 } 6949 6950 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6951 "mute is supported, volume control is %s\n", 6952 str_supported(!tp_features.mixer_no_level_control)); 6953 6954 rc = volume_create_alsa_mixer(); 6955 if (rc) { 6956 pr_err("Could not create the ALSA mixer interface\n"); 6957 return rc; 6958 } 6959 6960 pr_info("Console audio control enabled, mode: %s\n", 6961 (volume_control_allowed) ? 6962 "override (read/write)" : 6963 "monitor (read only)"); 6964 6965 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6966 "registering volume hotkeys as change notification\n"); 6967 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6968 | TP_ACPI_HKEY_VOLUP_MASK 6969 | TP_ACPI_HKEY_VOLDWN_MASK 6970 | TP_ACPI_HKEY_MUTE_MASK); 6971 6972 return 0; 6973 } 6974 6975 static int volume_read(struct seq_file *m) 6976 { 6977 u8 status; 6978 6979 if (volume_get_status(&status) < 0) { 6980 seq_printf(m, "level:\t\tunreadable\n"); 6981 } else { 6982 if (tp_features.mixer_no_level_control) 6983 seq_printf(m, "level:\t\tunsupported\n"); 6984 else 6985 seq_printf(m, "level:\t\t%d\n", 6986 status & TP_EC_AUDIO_LVL_MSK); 6987 6988 seq_printf(m, "mute:\t\t%s\n", 6989 onoff(status, TP_EC_AUDIO_MUTESW)); 6990 6991 if (volume_control_allowed) { 6992 seq_printf(m, "commands:\tunmute, mute\n"); 6993 if (!tp_features.mixer_no_level_control) { 6994 seq_printf(m, 6995 "commands:\tup, down\n"); 6996 seq_printf(m, 6997 "commands:\tlevel <level>" 6998 " (<level> is 0-%d)\n", 6999 TP_EC_VOLUME_MAX); 7000 } 7001 } 7002 } 7003 7004 return 0; 7005 } 7006 7007 static int volume_write(char *buf) 7008 { 7009 u8 s; 7010 u8 new_level, new_mute; 7011 int l; 7012 char *cmd; 7013 int rc; 7014 7015 /* 7016 * We do allow volume control at driver startup, so that the 7017 * user can set initial state through the volume=... parameter hack. 7018 */ 7019 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7020 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7021 tp_warned.volume_ctrl_forbidden = 1; 7022 pr_notice("Console audio control in monitor mode, " 7023 "changes are not allowed\n"); 7024 pr_notice("Use the volume_control=1 module parameter " 7025 "to enable volume control\n"); 7026 } 7027 return -EPERM; 7028 } 7029 7030 rc = volume_get_status(&s); 7031 if (rc < 0) 7032 return rc; 7033 7034 new_level = s & TP_EC_AUDIO_LVL_MSK; 7035 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7036 7037 while ((cmd = next_cmd(&buf))) { 7038 if (!tp_features.mixer_no_level_control) { 7039 if (strlencmp(cmd, "up") == 0) { 7040 if (new_mute) 7041 new_mute = 0; 7042 else if (new_level < TP_EC_VOLUME_MAX) 7043 new_level++; 7044 continue; 7045 } else if (strlencmp(cmd, "down") == 0) { 7046 if (new_mute) 7047 new_mute = 0; 7048 else if (new_level > 0) 7049 new_level--; 7050 continue; 7051 } else if (sscanf(cmd, "level %u", &l) == 1 && 7052 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7053 new_level = l; 7054 continue; 7055 } 7056 } 7057 if (strlencmp(cmd, "mute") == 0) 7058 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7059 else if (strlencmp(cmd, "unmute") == 0) 7060 new_mute = 0; 7061 else 7062 return -EINVAL; 7063 } 7064 7065 if (tp_features.mixer_no_level_control) { 7066 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7067 new_mute ? "" : "un"); 7068 rc = volume_set_mute(!!new_mute); 7069 } else { 7070 tpacpi_disclose_usertask("procfs volume", 7071 "%smute and set level to %d\n", 7072 new_mute ? "" : "un", new_level); 7073 rc = volume_set_status(new_mute | new_level); 7074 } 7075 volume_alsa_notify_change(); 7076 7077 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7078 } 7079 7080 static struct ibm_struct volume_driver_data = { 7081 .name = "volume", 7082 .read = volume_read, 7083 .write = volume_write, 7084 .exit = volume_exit, 7085 .suspend = volume_suspend, 7086 .resume = volume_resume, 7087 .shutdown = volume_shutdown, 7088 }; 7089 7090 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7091 7092 #define alsa_card NULL 7093 7094 static void inline volume_alsa_notify_change(void) 7095 { 7096 } 7097 7098 static int __init volume_init(struct ibm_init_struct *iibm) 7099 { 7100 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7101 7102 return 1; 7103 } 7104 7105 static struct ibm_struct volume_driver_data = { 7106 .name = "volume", 7107 }; 7108 7109 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7110 7111 /************************************************************************* 7112 * Fan subdriver 7113 */ 7114 7115 /* 7116 * FAN ACCESS MODES 7117 * 7118 * TPACPI_FAN_RD_ACPI_GFAN: 7119 * ACPI GFAN method: returns fan level 7120 * 7121 * see TPACPI_FAN_WR_ACPI_SFAN 7122 * EC 0x2f (HFSP) not available if GFAN exists 7123 * 7124 * TPACPI_FAN_WR_ACPI_SFAN: 7125 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7126 * 7127 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7128 * it for writing. 7129 * 7130 * TPACPI_FAN_WR_TPEC: 7131 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7132 * Supported on almost all ThinkPads 7133 * 7134 * Fan speed changes of any sort (including those caused by the 7135 * disengaged mode) are usually done slowly by the firmware as the 7136 * maximum amount of fan duty cycle change per second seems to be 7137 * limited. 7138 * 7139 * Reading is not available if GFAN exists. 7140 * Writing is not available if SFAN exists. 7141 * 7142 * Bits 7143 * 7 automatic mode engaged; 7144 * (default operation mode of the ThinkPad) 7145 * fan level is ignored in this mode. 7146 * 6 full speed mode (takes precedence over bit 7); 7147 * not available on all thinkpads. May disable 7148 * the tachometer while the fan controller ramps up 7149 * the speed (which can take up to a few *minutes*). 7150 * Speeds up fan to 100% duty-cycle, which is far above 7151 * the standard RPM levels. It is not impossible that 7152 * it could cause hardware damage. 7153 * 5-3 unused in some models. Extra bits for fan level 7154 * in others, but still useless as all values above 7155 * 7 map to the same speed as level 7 in these models. 7156 * 2-0 fan level (0..7 usually) 7157 * 0x00 = stop 7158 * 0x07 = max (set when temperatures critical) 7159 * Some ThinkPads may have other levels, see 7160 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7161 * 7162 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7163 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7164 * does so, its initial value is meaningless (0x07). 7165 * 7166 * For firmware bugs, refer to: 7167 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7168 * 7169 * ---- 7170 * 7171 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7172 * Main fan tachometer reading (in RPM) 7173 * 7174 * This register is present on all ThinkPads with a new-style EC, and 7175 * it is known not to be present on the A21m/e, and T22, as there is 7176 * something else in offset 0x84 according to the ACPI DSDT. Other 7177 * ThinkPads from this same time period (and earlier) probably lack the 7178 * tachometer as well. 7179 * 7180 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7181 * was never fixed by IBM to report the EC firmware version string 7182 * probably support the tachometer (like the early X models), so 7183 * detecting it is quite hard. We need more data to know for sure. 7184 * 7185 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7186 * might result. 7187 * 7188 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7189 * mode. 7190 * 7191 * For firmware bugs, refer to: 7192 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7193 * 7194 * ---- 7195 * 7196 * ThinkPad EC register 0x31 bit 0 (only on select models) 7197 * 7198 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7199 * show the speed of the main fan. When bit 0 of EC register 0x31 7200 * is one, the tachometer registers show the speed of the auxiliary 7201 * fan. 7202 * 7203 * Fan control seems to affect both fans, regardless of the state 7204 * of this bit. 7205 * 7206 * So far, only the firmware for the X60/X61 non-tablet versions 7207 * seem to support this (firmware TP-7M). 7208 * 7209 * TPACPI_FAN_WR_ACPI_FANS: 7210 * ThinkPad X31, X40, X41. Not available in the X60. 7211 * 7212 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7213 * high speed. ACPI DSDT seems to map these three speeds to levels 7214 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7215 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7216 * 7217 * The speeds are stored on handles 7218 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7219 * 7220 * There are three default speed sets, accessible as handles: 7221 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7222 * 7223 * ACPI DSDT switches which set is in use depending on various 7224 * factors. 7225 * 7226 * TPACPI_FAN_WR_TPEC is also available and should be used to 7227 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7228 * but the ACPI tables just mention level 7. 7229 */ 7230 7231 enum { /* Fan control constants */ 7232 fan_status_offset = 0x2f, /* EC register 0x2f */ 7233 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7234 * 0x84 must be read before 0x85 */ 7235 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7236 bit 0 selects which fan is active */ 7237 7238 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7239 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7240 7241 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7242 }; 7243 7244 enum fan_status_access_mode { 7245 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7246 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7247 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7248 }; 7249 7250 enum fan_control_access_mode { 7251 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7252 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7253 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7254 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7255 }; 7256 7257 enum fan_control_commands { 7258 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7259 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7260 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7261 * and also watchdog cmd */ 7262 }; 7263 7264 static bool fan_control_allowed; 7265 7266 static enum fan_status_access_mode fan_status_access_mode; 7267 static enum fan_control_access_mode fan_control_access_mode; 7268 static enum fan_control_commands fan_control_commands; 7269 7270 static u8 fan_control_initial_status; 7271 static u8 fan_control_desired_level; 7272 static u8 fan_control_resume_level; 7273 static int fan_watchdog_maxinterval; 7274 7275 static struct mutex fan_mutex; 7276 7277 static void fan_watchdog_fire(struct work_struct *ignored); 7278 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7279 7280 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7281 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7282 "\\FSPD", /* 600e/x, 770e, 770x */ 7283 ); /* all others */ 7284 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7285 "JFNS", /* 770x-JL */ 7286 ); /* all others */ 7287 7288 /* 7289 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7290 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7291 * be in auto mode (0x80). 7292 * 7293 * This is corrected by any write to HFSP either by the driver, or 7294 * by the firmware. 7295 * 7296 * We assume 0x07 really means auto mode while this quirk is active, 7297 * as this is far more likely than the ThinkPad being in level 7, 7298 * which is only used by the firmware during thermal emergencies. 7299 * 7300 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7301 * TP-70 (T43, R52), which are known to be buggy. 7302 */ 7303 7304 static void fan_quirk1_setup(void) 7305 { 7306 if (fan_control_initial_status == 0x07) { 7307 pr_notice("fan_init: initial fan status is unknown, " 7308 "assuming it is in auto mode\n"); 7309 tp_features.fan_ctrl_status_undef = 1; 7310 } 7311 } 7312 7313 static void fan_quirk1_handle(u8 *fan_status) 7314 { 7315 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7316 if (*fan_status != fan_control_initial_status) { 7317 /* something changed the HFSP regisnter since 7318 * driver init time, so it is not undefined 7319 * anymore */ 7320 tp_features.fan_ctrl_status_undef = 0; 7321 } else { 7322 /* Return most likely status. In fact, it 7323 * might be the only possible status */ 7324 *fan_status = TP_EC_FAN_AUTO; 7325 } 7326 } 7327 } 7328 7329 /* Select main fan on X60/X61, NOOP on others */ 7330 static bool fan_select_fan1(void) 7331 { 7332 if (tp_features.second_fan) { 7333 u8 val; 7334 7335 if (ec_read(fan_select_offset, &val) < 0) 7336 return false; 7337 val &= 0xFEU; 7338 if (ec_write(fan_select_offset, val) < 0) 7339 return false; 7340 } 7341 return true; 7342 } 7343 7344 /* Select secondary fan on X60/X61 */ 7345 static bool fan_select_fan2(void) 7346 { 7347 u8 val; 7348 7349 if (!tp_features.second_fan) 7350 return false; 7351 7352 if (ec_read(fan_select_offset, &val) < 0) 7353 return false; 7354 val |= 0x01U; 7355 if (ec_write(fan_select_offset, val) < 0) 7356 return false; 7357 7358 return true; 7359 } 7360 7361 /* 7362 * Call with fan_mutex held 7363 */ 7364 static void fan_update_desired_level(u8 status) 7365 { 7366 if ((status & 7367 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7368 if (status > 7) 7369 fan_control_desired_level = 7; 7370 else 7371 fan_control_desired_level = status; 7372 } 7373 } 7374 7375 static int fan_get_status(u8 *status) 7376 { 7377 u8 s; 7378 7379 /* TODO: 7380 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 7381 7382 switch (fan_status_access_mode) { 7383 case TPACPI_FAN_RD_ACPI_GFAN: { 7384 /* 570, 600e/x, 770e, 770x */ 7385 int res; 7386 7387 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 7388 return -EIO; 7389 7390 if (likely(status)) 7391 *status = res & 0x07; 7392 7393 break; 7394 } 7395 case TPACPI_FAN_RD_TPEC: 7396 /* all except 570, 600e/x, 770e, 770x */ 7397 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 7398 return -EIO; 7399 7400 if (likely(status)) { 7401 *status = s; 7402 fan_quirk1_handle(status); 7403 } 7404 7405 break; 7406 7407 default: 7408 return -ENXIO; 7409 } 7410 7411 return 0; 7412 } 7413 7414 static int fan_get_status_safe(u8 *status) 7415 { 7416 int rc; 7417 u8 s; 7418 7419 if (mutex_lock_killable(&fan_mutex)) 7420 return -ERESTARTSYS; 7421 rc = fan_get_status(&s); 7422 if (!rc) 7423 fan_update_desired_level(s); 7424 mutex_unlock(&fan_mutex); 7425 7426 if (status) 7427 *status = s; 7428 7429 return rc; 7430 } 7431 7432 static int fan_get_speed(unsigned int *speed) 7433 { 7434 u8 hi, lo; 7435 7436 switch (fan_status_access_mode) { 7437 case TPACPI_FAN_RD_TPEC: 7438 /* all except 570, 600e/x, 770e, 770x */ 7439 if (unlikely(!fan_select_fan1())) 7440 return -EIO; 7441 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 7442 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 7443 return -EIO; 7444 7445 if (likely(speed)) 7446 *speed = (hi << 8) | lo; 7447 7448 break; 7449 7450 default: 7451 return -ENXIO; 7452 } 7453 7454 return 0; 7455 } 7456 7457 static int fan2_get_speed(unsigned int *speed) 7458 { 7459 u8 hi, lo; 7460 bool rc; 7461 7462 switch (fan_status_access_mode) { 7463 case TPACPI_FAN_RD_TPEC: 7464 /* all except 570, 600e/x, 770e, 770x */ 7465 if (unlikely(!fan_select_fan2())) 7466 return -EIO; 7467 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 7468 !acpi_ec_read(fan_rpm_offset + 1, &hi); 7469 fan_select_fan1(); /* play it safe */ 7470 if (rc) 7471 return -EIO; 7472 7473 if (likely(speed)) 7474 *speed = (hi << 8) | lo; 7475 7476 break; 7477 7478 default: 7479 return -ENXIO; 7480 } 7481 7482 return 0; 7483 } 7484 7485 static int fan_set_level(int level) 7486 { 7487 if (!fan_control_allowed) 7488 return -EPERM; 7489 7490 switch (fan_control_access_mode) { 7491 case TPACPI_FAN_WR_ACPI_SFAN: 7492 if (level >= 0 && level <= 7) { 7493 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 7494 return -EIO; 7495 } else 7496 return -EINVAL; 7497 break; 7498 7499 case TPACPI_FAN_WR_ACPI_FANS: 7500 case TPACPI_FAN_WR_TPEC: 7501 if (!(level & TP_EC_FAN_AUTO) && 7502 !(level & TP_EC_FAN_FULLSPEED) && 7503 ((level < 0) || (level > 7))) 7504 return -EINVAL; 7505 7506 /* safety net should the EC not support AUTO 7507 * or FULLSPEED mode bits and just ignore them */ 7508 if (level & TP_EC_FAN_FULLSPEED) 7509 level |= 7; /* safety min speed 7 */ 7510 else if (level & TP_EC_FAN_AUTO) 7511 level |= 4; /* safety min speed 4 */ 7512 7513 if (!acpi_ec_write(fan_status_offset, level)) 7514 return -EIO; 7515 else 7516 tp_features.fan_ctrl_status_undef = 0; 7517 break; 7518 7519 default: 7520 return -ENXIO; 7521 } 7522 7523 vdbg_printk(TPACPI_DBG_FAN, 7524 "fan control: set fan control register to 0x%02x\n", level); 7525 return 0; 7526 } 7527 7528 static int fan_set_level_safe(int level) 7529 { 7530 int rc; 7531 7532 if (!fan_control_allowed) 7533 return -EPERM; 7534 7535 if (mutex_lock_killable(&fan_mutex)) 7536 return -ERESTARTSYS; 7537 7538 if (level == TPACPI_FAN_LAST_LEVEL) 7539 level = fan_control_desired_level; 7540 7541 rc = fan_set_level(level); 7542 if (!rc) 7543 fan_update_desired_level(level); 7544 7545 mutex_unlock(&fan_mutex); 7546 return rc; 7547 } 7548 7549 static int fan_set_enable(void) 7550 { 7551 u8 s; 7552 int rc; 7553 7554 if (!fan_control_allowed) 7555 return -EPERM; 7556 7557 if (mutex_lock_killable(&fan_mutex)) 7558 return -ERESTARTSYS; 7559 7560 switch (fan_control_access_mode) { 7561 case TPACPI_FAN_WR_ACPI_FANS: 7562 case TPACPI_FAN_WR_TPEC: 7563 rc = fan_get_status(&s); 7564 if (rc < 0) 7565 break; 7566 7567 /* Don't go out of emergency fan mode */ 7568 if (s != 7) { 7569 s &= 0x07; 7570 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 7571 } 7572 7573 if (!acpi_ec_write(fan_status_offset, s)) 7574 rc = -EIO; 7575 else { 7576 tp_features.fan_ctrl_status_undef = 0; 7577 rc = 0; 7578 } 7579 break; 7580 7581 case TPACPI_FAN_WR_ACPI_SFAN: 7582 rc = fan_get_status(&s); 7583 if (rc < 0) 7584 break; 7585 7586 s &= 0x07; 7587 7588 /* Set fan to at least level 4 */ 7589 s |= 4; 7590 7591 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 7592 rc = -EIO; 7593 else 7594 rc = 0; 7595 break; 7596 7597 default: 7598 rc = -ENXIO; 7599 } 7600 7601 mutex_unlock(&fan_mutex); 7602 7603 if (!rc) 7604 vdbg_printk(TPACPI_DBG_FAN, 7605 "fan control: set fan control register to 0x%02x\n", 7606 s); 7607 return rc; 7608 } 7609 7610 static int fan_set_disable(void) 7611 { 7612 int rc; 7613 7614 if (!fan_control_allowed) 7615 return -EPERM; 7616 7617 if (mutex_lock_killable(&fan_mutex)) 7618 return -ERESTARTSYS; 7619 7620 rc = 0; 7621 switch (fan_control_access_mode) { 7622 case TPACPI_FAN_WR_ACPI_FANS: 7623 case TPACPI_FAN_WR_TPEC: 7624 if (!acpi_ec_write(fan_status_offset, 0x00)) 7625 rc = -EIO; 7626 else { 7627 fan_control_desired_level = 0; 7628 tp_features.fan_ctrl_status_undef = 0; 7629 } 7630 break; 7631 7632 case TPACPI_FAN_WR_ACPI_SFAN: 7633 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 7634 rc = -EIO; 7635 else 7636 fan_control_desired_level = 0; 7637 break; 7638 7639 default: 7640 rc = -ENXIO; 7641 } 7642 7643 if (!rc) 7644 vdbg_printk(TPACPI_DBG_FAN, 7645 "fan control: set fan control register to 0\n"); 7646 7647 mutex_unlock(&fan_mutex); 7648 return rc; 7649 } 7650 7651 static int fan_set_speed(int speed) 7652 { 7653 int rc; 7654 7655 if (!fan_control_allowed) 7656 return -EPERM; 7657 7658 if (mutex_lock_killable(&fan_mutex)) 7659 return -ERESTARTSYS; 7660 7661 rc = 0; 7662 switch (fan_control_access_mode) { 7663 case TPACPI_FAN_WR_ACPI_FANS: 7664 if (speed >= 0 && speed <= 65535) { 7665 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 7666 speed, speed, speed)) 7667 rc = -EIO; 7668 } else 7669 rc = -EINVAL; 7670 break; 7671 7672 default: 7673 rc = -ENXIO; 7674 } 7675 7676 mutex_unlock(&fan_mutex); 7677 return rc; 7678 } 7679 7680 static void fan_watchdog_reset(void) 7681 { 7682 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 7683 return; 7684 7685 if (fan_watchdog_maxinterval > 0 && 7686 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 7687 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 7688 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 7689 else 7690 cancel_delayed_work(&fan_watchdog_task); 7691 } 7692 7693 static void fan_watchdog_fire(struct work_struct *ignored) 7694 { 7695 int rc; 7696 7697 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 7698 return; 7699 7700 pr_notice("fan watchdog: enabling fan\n"); 7701 rc = fan_set_enable(); 7702 if (rc < 0) { 7703 pr_err("fan watchdog: error %d while enabling fan, " 7704 "will try again later...\n", -rc); 7705 /* reschedule for later */ 7706 fan_watchdog_reset(); 7707 } 7708 } 7709 7710 /* 7711 * SYSFS fan layout: hwmon compatible (device) 7712 * 7713 * pwm*_enable: 7714 * 0: "disengaged" mode 7715 * 1: manual mode 7716 * 2: native EC "auto" mode (recommended, hardware default) 7717 * 7718 * pwm*: set speed in manual mode, ignored otherwise. 7719 * 0 is level 0; 255 is level 7. Intermediate points done with linear 7720 * interpolation. 7721 * 7722 * fan*_input: tachometer reading, RPM 7723 * 7724 * 7725 * SYSFS fan layout: extensions 7726 * 7727 * fan_watchdog (driver): 7728 * fan watchdog interval in seconds, 0 disables (default), max 120 7729 */ 7730 7731 /* sysfs fan pwm1_enable ----------------------------------------------- */ 7732 static ssize_t fan_pwm1_enable_show(struct device *dev, 7733 struct device_attribute *attr, 7734 char *buf) 7735 { 7736 int res, mode; 7737 u8 status; 7738 7739 res = fan_get_status_safe(&status); 7740 if (res) 7741 return res; 7742 7743 if (status & TP_EC_FAN_FULLSPEED) { 7744 mode = 0; 7745 } else if (status & TP_EC_FAN_AUTO) { 7746 mode = 2; 7747 } else 7748 mode = 1; 7749 7750 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 7751 } 7752 7753 static ssize_t fan_pwm1_enable_store(struct device *dev, 7754 struct device_attribute *attr, 7755 const char *buf, size_t count) 7756 { 7757 unsigned long t; 7758 int res, level; 7759 7760 if (parse_strtoul(buf, 2, &t)) 7761 return -EINVAL; 7762 7763 tpacpi_disclose_usertask("hwmon pwm1_enable", 7764 "set fan mode to %lu\n", t); 7765 7766 switch (t) { 7767 case 0: 7768 level = TP_EC_FAN_FULLSPEED; 7769 break; 7770 case 1: 7771 level = TPACPI_FAN_LAST_LEVEL; 7772 break; 7773 case 2: 7774 level = TP_EC_FAN_AUTO; 7775 break; 7776 case 3: 7777 /* reserved for software-controlled auto mode */ 7778 return -ENOSYS; 7779 default: 7780 return -EINVAL; 7781 } 7782 7783 res = fan_set_level_safe(level); 7784 if (res == -ENXIO) 7785 return -EINVAL; 7786 else if (res < 0) 7787 return res; 7788 7789 fan_watchdog_reset(); 7790 7791 return count; 7792 } 7793 7794 static struct device_attribute dev_attr_fan_pwm1_enable = 7795 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 7796 fan_pwm1_enable_show, fan_pwm1_enable_store); 7797 7798 /* sysfs fan pwm1 ------------------------------------------------------ */ 7799 static ssize_t fan_pwm1_show(struct device *dev, 7800 struct device_attribute *attr, 7801 char *buf) 7802 { 7803 int res; 7804 u8 status; 7805 7806 res = fan_get_status_safe(&status); 7807 if (res) 7808 return res; 7809 7810 if ((status & 7811 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 7812 status = fan_control_desired_level; 7813 7814 if (status > 7) 7815 status = 7; 7816 7817 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 7818 } 7819 7820 static ssize_t fan_pwm1_store(struct device *dev, 7821 struct device_attribute *attr, 7822 const char *buf, size_t count) 7823 { 7824 unsigned long s; 7825 int rc; 7826 u8 status, newlevel; 7827 7828 if (parse_strtoul(buf, 255, &s)) 7829 return -EINVAL; 7830 7831 tpacpi_disclose_usertask("hwmon pwm1", 7832 "set fan speed to %lu\n", s); 7833 7834 /* scale down from 0-255 to 0-7 */ 7835 newlevel = (s >> 5) & 0x07; 7836 7837 if (mutex_lock_killable(&fan_mutex)) 7838 return -ERESTARTSYS; 7839 7840 rc = fan_get_status(&status); 7841 if (!rc && (status & 7842 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7843 rc = fan_set_level(newlevel); 7844 if (rc == -ENXIO) 7845 rc = -EINVAL; 7846 else if (!rc) { 7847 fan_update_desired_level(newlevel); 7848 fan_watchdog_reset(); 7849 } 7850 } 7851 7852 mutex_unlock(&fan_mutex); 7853 return (rc)? rc : count; 7854 } 7855 7856 static struct device_attribute dev_attr_fan_pwm1 = 7857 __ATTR(pwm1, S_IWUSR | S_IRUGO, 7858 fan_pwm1_show, fan_pwm1_store); 7859 7860 /* sysfs fan fan1_input ------------------------------------------------ */ 7861 static ssize_t fan_fan1_input_show(struct device *dev, 7862 struct device_attribute *attr, 7863 char *buf) 7864 { 7865 int res; 7866 unsigned int speed; 7867 7868 res = fan_get_speed(&speed); 7869 if (res < 0) 7870 return res; 7871 7872 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7873 } 7874 7875 static struct device_attribute dev_attr_fan_fan1_input = 7876 __ATTR(fan1_input, S_IRUGO, 7877 fan_fan1_input_show, NULL); 7878 7879 /* sysfs fan fan2_input ------------------------------------------------ */ 7880 static ssize_t fan_fan2_input_show(struct device *dev, 7881 struct device_attribute *attr, 7882 char *buf) 7883 { 7884 int res; 7885 unsigned int speed; 7886 7887 res = fan2_get_speed(&speed); 7888 if (res < 0) 7889 return res; 7890 7891 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7892 } 7893 7894 static struct device_attribute dev_attr_fan_fan2_input = 7895 __ATTR(fan2_input, S_IRUGO, 7896 fan_fan2_input_show, NULL); 7897 7898 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 7899 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 7900 char *buf) 7901 { 7902 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 7903 } 7904 7905 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 7906 const char *buf, size_t count) 7907 { 7908 unsigned long t; 7909 7910 if (parse_strtoul(buf, 120, &t)) 7911 return -EINVAL; 7912 7913 if (!fan_control_allowed) 7914 return -EPERM; 7915 7916 fan_watchdog_maxinterval = t; 7917 fan_watchdog_reset(); 7918 7919 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 7920 7921 return count; 7922 } 7923 7924 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 7925 fan_fan_watchdog_show, fan_fan_watchdog_store); 7926 7927 /* --------------------------------------------------------------------- */ 7928 static struct attribute *fan_attributes[] = { 7929 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr, 7930 &dev_attr_fan_fan1_input.attr, 7931 NULL, /* for fan2_input */ 7932 NULL 7933 }; 7934 7935 static const struct attribute_group fan_attr_group = { 7936 .attrs = fan_attributes, 7937 }; 7938 7939 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 7940 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 7941 7942 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 7943 { .vendor = PCI_VENDOR_ID_IBM, \ 7944 .bios = TPACPI_MATCH_ANY, \ 7945 .ec = TPID(__id1, __id2), \ 7946 .quirks = __quirks } 7947 7948 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 7949 { .vendor = PCI_VENDOR_ID_LENOVO, \ 7950 .bios = TPACPI_MATCH_ANY, \ 7951 .ec = TPID(__id1, __id2), \ 7952 .quirks = __quirks } 7953 7954 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 7955 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 7956 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 7957 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 7958 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 7959 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 7960 }; 7961 7962 #undef TPACPI_FAN_QL 7963 #undef TPACPI_FAN_QI 7964 7965 static int __init fan_init(struct ibm_init_struct *iibm) 7966 { 7967 int rc; 7968 unsigned long quirks; 7969 7970 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 7971 "initializing fan subdriver\n"); 7972 7973 mutex_init(&fan_mutex); 7974 fan_status_access_mode = TPACPI_FAN_NONE; 7975 fan_control_access_mode = TPACPI_FAN_WR_NONE; 7976 fan_control_commands = 0; 7977 fan_watchdog_maxinterval = 0; 7978 tp_features.fan_ctrl_status_undef = 0; 7979 tp_features.second_fan = 0; 7980 fan_control_desired_level = 7; 7981 7982 if (tpacpi_is_ibm()) { 7983 TPACPI_ACPIHANDLE_INIT(fans); 7984 TPACPI_ACPIHANDLE_INIT(gfan); 7985 TPACPI_ACPIHANDLE_INIT(sfan); 7986 } 7987 7988 quirks = tpacpi_check_quirks(fan_quirk_table, 7989 ARRAY_SIZE(fan_quirk_table)); 7990 7991 if (gfan_handle) { 7992 /* 570, 600e/x, 770e, 770x */ 7993 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 7994 } else { 7995 /* all other ThinkPads: note that even old-style 7996 * ThinkPad ECs supports the fan control register */ 7997 if (likely(acpi_ec_read(fan_status_offset, 7998 &fan_control_initial_status))) { 7999 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8000 if (quirks & TPACPI_FAN_Q1) 8001 fan_quirk1_setup(); 8002 if (quirks & TPACPI_FAN_2FAN) { 8003 tp_features.second_fan = 1; 8004 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8005 "secondary fan support enabled\n"); 8006 } 8007 } else { 8008 pr_err("ThinkPad ACPI EC access misbehaving, " 8009 "fan status and control unavailable\n"); 8010 return 1; 8011 } 8012 } 8013 8014 if (sfan_handle) { 8015 /* 570, 770x-JL */ 8016 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8017 fan_control_commands |= 8018 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8019 } else { 8020 if (!gfan_handle) { 8021 /* gfan without sfan means no fan control */ 8022 /* all other models implement TP EC 0x2f control */ 8023 8024 if (fans_handle) { 8025 /* X31, X40, X41 */ 8026 fan_control_access_mode = 8027 TPACPI_FAN_WR_ACPI_FANS; 8028 fan_control_commands |= 8029 TPACPI_FAN_CMD_SPEED | 8030 TPACPI_FAN_CMD_LEVEL | 8031 TPACPI_FAN_CMD_ENABLE; 8032 } else { 8033 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8034 fan_control_commands |= 8035 TPACPI_FAN_CMD_LEVEL | 8036 TPACPI_FAN_CMD_ENABLE; 8037 } 8038 } 8039 } 8040 8041 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8042 "fan is %s, modes %d, %d\n", 8043 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8044 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8045 fan_status_access_mode, fan_control_access_mode); 8046 8047 /* fan control master switch */ 8048 if (!fan_control_allowed) { 8049 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8050 fan_control_commands = 0; 8051 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8052 "fan control features disabled by parameter\n"); 8053 } 8054 8055 /* update fan_control_desired_level */ 8056 if (fan_status_access_mode != TPACPI_FAN_NONE) 8057 fan_get_status_safe(NULL); 8058 8059 if (fan_status_access_mode != TPACPI_FAN_NONE || 8060 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8061 if (tp_features.second_fan) { 8062 /* attach second fan tachometer */ 8063 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8064 &dev_attr_fan_fan2_input.attr; 8065 } 8066 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8067 &fan_attr_group); 8068 if (rc < 0) 8069 return rc; 8070 8071 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8072 &driver_attr_fan_watchdog); 8073 if (rc < 0) { 8074 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8075 &fan_attr_group); 8076 return rc; 8077 } 8078 return 0; 8079 } else 8080 return 1; 8081 } 8082 8083 static void fan_exit(void) 8084 { 8085 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8086 "cancelling any pending fan watchdog tasks\n"); 8087 8088 /* FIXME: can we really do this unconditionally? */ 8089 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8090 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8091 &driver_attr_fan_watchdog); 8092 8093 cancel_delayed_work(&fan_watchdog_task); 8094 flush_workqueue(tpacpi_wq); 8095 } 8096 8097 static void fan_suspend(void) 8098 { 8099 int rc; 8100 8101 if (!fan_control_allowed) 8102 return; 8103 8104 /* Store fan status in cache */ 8105 fan_control_resume_level = 0; 8106 rc = fan_get_status_safe(&fan_control_resume_level); 8107 if (rc < 0) 8108 pr_notice("failed to read fan level for later " 8109 "restore during resume: %d\n", rc); 8110 8111 /* if it is undefined, don't attempt to restore it. 8112 * KEEP THIS LAST */ 8113 if (tp_features.fan_ctrl_status_undef) 8114 fan_control_resume_level = 0; 8115 } 8116 8117 static void fan_resume(void) 8118 { 8119 u8 current_level = 7; 8120 bool do_set = false; 8121 int rc; 8122 8123 /* DSDT *always* updates status on resume */ 8124 tp_features.fan_ctrl_status_undef = 0; 8125 8126 if (!fan_control_allowed || 8127 !fan_control_resume_level || 8128 (fan_get_status_safe(¤t_level) < 0)) 8129 return; 8130 8131 switch (fan_control_access_mode) { 8132 case TPACPI_FAN_WR_ACPI_SFAN: 8133 /* never decrease fan level */ 8134 do_set = (fan_control_resume_level > current_level); 8135 break; 8136 case TPACPI_FAN_WR_ACPI_FANS: 8137 case TPACPI_FAN_WR_TPEC: 8138 /* never decrease fan level, scale is: 8139 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8140 * 8141 * We expect the firmware to set either 7 or AUTO, but we 8142 * handle FULLSPEED out of paranoia. 8143 * 8144 * So, we can safely only restore FULLSPEED or 7, anything 8145 * else could slow the fan. Restoring AUTO is useless, at 8146 * best that's exactly what the DSDT already set (it is the 8147 * slower it uses). 8148 * 8149 * Always keep in mind that the DSDT *will* have set the 8150 * fans to what the vendor supposes is the best level. We 8151 * muck with it only to speed the fan up. 8152 */ 8153 if (fan_control_resume_level != 7 && 8154 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8155 return; 8156 else 8157 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8158 (current_level != fan_control_resume_level); 8159 break; 8160 default: 8161 return; 8162 } 8163 if (do_set) { 8164 pr_notice("restoring fan level to 0x%02x\n", 8165 fan_control_resume_level); 8166 rc = fan_set_level_safe(fan_control_resume_level); 8167 if (rc < 0) 8168 pr_notice("failed to restore fan level: %d\n", rc); 8169 } 8170 } 8171 8172 static int fan_read(struct seq_file *m) 8173 { 8174 int rc; 8175 u8 status; 8176 unsigned int speed = 0; 8177 8178 switch (fan_status_access_mode) { 8179 case TPACPI_FAN_RD_ACPI_GFAN: 8180 /* 570, 600e/x, 770e, 770x */ 8181 rc = fan_get_status_safe(&status); 8182 if (rc < 0) 8183 return rc; 8184 8185 seq_printf(m, "status:\t\t%s\n" 8186 "level:\t\t%d\n", 8187 (status != 0) ? "enabled" : "disabled", status); 8188 break; 8189 8190 case TPACPI_FAN_RD_TPEC: 8191 /* all except 570, 600e/x, 770e, 770x */ 8192 rc = fan_get_status_safe(&status); 8193 if (rc < 0) 8194 return rc; 8195 8196 seq_printf(m, "status:\t\t%s\n", 8197 (status != 0) ? "enabled" : "disabled"); 8198 8199 rc = fan_get_speed(&speed); 8200 if (rc < 0) 8201 return rc; 8202 8203 seq_printf(m, "speed:\t\t%d\n", speed); 8204 8205 if (status & TP_EC_FAN_FULLSPEED) 8206 /* Disengaged mode takes precedence */ 8207 seq_printf(m, "level:\t\tdisengaged\n"); 8208 else if (status & TP_EC_FAN_AUTO) 8209 seq_printf(m, "level:\t\tauto\n"); 8210 else 8211 seq_printf(m, "level:\t\t%d\n", status); 8212 break; 8213 8214 case TPACPI_FAN_NONE: 8215 default: 8216 seq_printf(m, "status:\t\tnot supported\n"); 8217 } 8218 8219 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8220 seq_printf(m, "commands:\tlevel <level>"); 8221 8222 switch (fan_control_access_mode) { 8223 case TPACPI_FAN_WR_ACPI_SFAN: 8224 seq_printf(m, " (<level> is 0-7)\n"); 8225 break; 8226 8227 default: 8228 seq_printf(m, " (<level> is 0-7, " 8229 "auto, disengaged, full-speed)\n"); 8230 break; 8231 } 8232 } 8233 8234 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8235 seq_printf(m, "commands:\tenable, disable\n" 8236 "commands:\twatchdog <timeout> (<timeout> " 8237 "is 0 (off), 1-120 (seconds))\n"); 8238 8239 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8240 seq_printf(m, "commands:\tspeed <speed>" 8241 " (<speed> is 0-65535)\n"); 8242 8243 return 0; 8244 } 8245 8246 static int fan_write_cmd_level(const char *cmd, int *rc) 8247 { 8248 int level; 8249 8250 if (strlencmp(cmd, "level auto") == 0) 8251 level = TP_EC_FAN_AUTO; 8252 else if ((strlencmp(cmd, "level disengaged") == 0) | 8253 (strlencmp(cmd, "level full-speed") == 0)) 8254 level = TP_EC_FAN_FULLSPEED; 8255 else if (sscanf(cmd, "level %d", &level) != 1) 8256 return 0; 8257 8258 *rc = fan_set_level_safe(level); 8259 if (*rc == -ENXIO) 8260 pr_err("level command accepted for unsupported access mode %d\n", 8261 fan_control_access_mode); 8262 else if (!*rc) 8263 tpacpi_disclose_usertask("procfs fan", 8264 "set level to %d\n", level); 8265 8266 return 1; 8267 } 8268 8269 static int fan_write_cmd_enable(const char *cmd, int *rc) 8270 { 8271 if (strlencmp(cmd, "enable") != 0) 8272 return 0; 8273 8274 *rc = fan_set_enable(); 8275 if (*rc == -ENXIO) 8276 pr_err("enable command accepted for unsupported access mode %d\n", 8277 fan_control_access_mode); 8278 else if (!*rc) 8279 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8280 8281 return 1; 8282 } 8283 8284 static int fan_write_cmd_disable(const char *cmd, int *rc) 8285 { 8286 if (strlencmp(cmd, "disable") != 0) 8287 return 0; 8288 8289 *rc = fan_set_disable(); 8290 if (*rc == -ENXIO) 8291 pr_err("disable command accepted for unsupported access mode %d\n", 8292 fan_control_access_mode); 8293 else if (!*rc) 8294 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8295 8296 return 1; 8297 } 8298 8299 static int fan_write_cmd_speed(const char *cmd, int *rc) 8300 { 8301 int speed; 8302 8303 /* TODO: 8304 * Support speed <low> <medium> <high> ? */ 8305 8306 if (sscanf(cmd, "speed %d", &speed) != 1) 8307 return 0; 8308 8309 *rc = fan_set_speed(speed); 8310 if (*rc == -ENXIO) 8311 pr_err("speed command accepted for unsupported access mode %d\n", 8312 fan_control_access_mode); 8313 else if (!*rc) 8314 tpacpi_disclose_usertask("procfs fan", 8315 "set speed to %d\n", speed); 8316 8317 return 1; 8318 } 8319 8320 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8321 { 8322 int interval; 8323 8324 if (sscanf(cmd, "watchdog %d", &interval) != 1) 8325 return 0; 8326 8327 if (interval < 0 || interval > 120) 8328 *rc = -EINVAL; 8329 else { 8330 fan_watchdog_maxinterval = interval; 8331 tpacpi_disclose_usertask("procfs fan", 8332 "set watchdog timer to %d\n", 8333 interval); 8334 } 8335 8336 return 1; 8337 } 8338 8339 static int fan_write(char *buf) 8340 { 8341 char *cmd; 8342 int rc = 0; 8343 8344 while (!rc && (cmd = next_cmd(&buf))) { 8345 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 8346 fan_write_cmd_level(cmd, &rc)) && 8347 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 8348 (fan_write_cmd_enable(cmd, &rc) || 8349 fan_write_cmd_disable(cmd, &rc) || 8350 fan_write_cmd_watchdog(cmd, &rc))) && 8351 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 8352 fan_write_cmd_speed(cmd, &rc)) 8353 ) 8354 rc = -EINVAL; 8355 else if (!rc) 8356 fan_watchdog_reset(); 8357 } 8358 8359 return rc; 8360 } 8361 8362 static struct ibm_struct fan_driver_data = { 8363 .name = "fan", 8364 .read = fan_read, 8365 .write = fan_write, 8366 .exit = fan_exit, 8367 .suspend = fan_suspend, 8368 .resume = fan_resume, 8369 }; 8370 8371 /**************************************************************************** 8372 **************************************************************************** 8373 * 8374 * Infrastructure 8375 * 8376 **************************************************************************** 8377 ****************************************************************************/ 8378 8379 /* 8380 * HKEY event callout for other subdrivers go here 8381 * (yes, it is ugly, but it is quick, safe, and gets the job done 8382 */ 8383 static void tpacpi_driver_event(const unsigned int hkey_event) 8384 { 8385 if (ibm_backlight_device) { 8386 switch (hkey_event) { 8387 case TP_HKEY_EV_BRGHT_UP: 8388 case TP_HKEY_EV_BRGHT_DOWN: 8389 tpacpi_brightness_notify_change(); 8390 } 8391 } 8392 if (alsa_card) { 8393 switch (hkey_event) { 8394 case TP_HKEY_EV_VOL_UP: 8395 case TP_HKEY_EV_VOL_DOWN: 8396 case TP_HKEY_EV_VOL_MUTE: 8397 volume_alsa_notify_change(); 8398 } 8399 } 8400 } 8401 8402 static void hotkey_driver_event(const unsigned int scancode) 8403 { 8404 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 8405 } 8406 8407 /* sysfs name ---------------------------------------------------------- */ 8408 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 8409 struct device_attribute *attr, 8410 char *buf) 8411 { 8412 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 8413 } 8414 8415 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name = 8416 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 8417 8418 /* --------------------------------------------------------------------- */ 8419 8420 /* /proc support */ 8421 static struct proc_dir_entry *proc_dir; 8422 8423 /* 8424 * Module and infrastructure proble, init and exit handling 8425 */ 8426 8427 static bool force_load; 8428 8429 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 8430 static const char * __init str_supported(int is_supported) 8431 { 8432 static char text_unsupported[] __initdata = "not supported"; 8433 8434 return (is_supported)? &text_unsupported[4] : &text_unsupported[0]; 8435 } 8436 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 8437 8438 static void ibm_exit(struct ibm_struct *ibm) 8439 { 8440 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 8441 8442 list_del_init(&ibm->all_drivers); 8443 8444 if (ibm->flags.acpi_notify_installed) { 8445 dbg_printk(TPACPI_DBG_EXIT, 8446 "%s: acpi_remove_notify_handler\n", ibm->name); 8447 BUG_ON(!ibm->acpi); 8448 acpi_remove_notify_handler(*ibm->acpi->handle, 8449 ibm->acpi->type, 8450 dispatch_acpi_notify); 8451 ibm->flags.acpi_notify_installed = 0; 8452 } 8453 8454 if (ibm->flags.proc_created) { 8455 dbg_printk(TPACPI_DBG_EXIT, 8456 "%s: remove_proc_entry\n", ibm->name); 8457 remove_proc_entry(ibm->name, proc_dir); 8458 ibm->flags.proc_created = 0; 8459 } 8460 8461 if (ibm->flags.acpi_driver_registered) { 8462 dbg_printk(TPACPI_DBG_EXIT, 8463 "%s: acpi_bus_unregister_driver\n", ibm->name); 8464 BUG_ON(!ibm->acpi); 8465 acpi_bus_unregister_driver(ibm->acpi->driver); 8466 kfree(ibm->acpi->driver); 8467 ibm->acpi->driver = NULL; 8468 ibm->flags.acpi_driver_registered = 0; 8469 } 8470 8471 if (ibm->flags.init_called && ibm->exit) { 8472 ibm->exit(); 8473 ibm->flags.init_called = 0; 8474 } 8475 8476 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 8477 } 8478 8479 static int __init ibm_init(struct ibm_init_struct *iibm) 8480 { 8481 int ret; 8482 struct ibm_struct *ibm = iibm->data; 8483 struct proc_dir_entry *entry; 8484 8485 BUG_ON(ibm == NULL); 8486 8487 INIT_LIST_HEAD(&ibm->all_drivers); 8488 8489 if (ibm->flags.experimental && !experimental) 8490 return 0; 8491 8492 dbg_printk(TPACPI_DBG_INIT, 8493 "probing for %s\n", ibm->name); 8494 8495 if (iibm->init) { 8496 ret = iibm->init(iibm); 8497 if (ret > 0) 8498 return 0; /* probe failed */ 8499 if (ret) 8500 return ret; 8501 8502 ibm->flags.init_called = 1; 8503 } 8504 8505 if (ibm->acpi) { 8506 if (ibm->acpi->hid) { 8507 ret = register_tpacpi_subdriver(ibm); 8508 if (ret) 8509 goto err_out; 8510 } 8511 8512 if (ibm->acpi->notify) { 8513 ret = setup_acpi_notify(ibm); 8514 if (ret == -ENODEV) { 8515 pr_notice("disabling subdriver %s\n", 8516 ibm->name); 8517 ret = 0; 8518 goto err_out; 8519 } 8520 if (ret < 0) 8521 goto err_out; 8522 } 8523 } 8524 8525 dbg_printk(TPACPI_DBG_INIT, 8526 "%s installed\n", ibm->name); 8527 8528 if (ibm->read) { 8529 umode_t mode = iibm->base_procfs_mode; 8530 8531 if (!mode) 8532 mode = S_IRUGO; 8533 if (ibm->write) 8534 mode |= S_IWUSR; 8535 entry = proc_create_data(ibm->name, mode, proc_dir, 8536 &dispatch_proc_fops, ibm); 8537 if (!entry) { 8538 pr_err("unable to create proc entry %s\n", ibm->name); 8539 ret = -ENODEV; 8540 goto err_out; 8541 } 8542 ibm->flags.proc_created = 1; 8543 } 8544 8545 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 8546 8547 return 0; 8548 8549 err_out: 8550 dbg_printk(TPACPI_DBG_INIT, 8551 "%s: at error exit path with result %d\n", 8552 ibm->name, ret); 8553 8554 ibm_exit(ibm); 8555 return (ret < 0)? ret : 0; 8556 } 8557 8558 /* Probing */ 8559 8560 static bool __pure __init tpacpi_is_fw_digit(const char c) 8561 { 8562 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 8563 } 8564 8565 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */ 8566 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s, 8567 const char t) 8568 { 8569 return s && strlen(s) >= 8 && 8570 tpacpi_is_fw_digit(s[0]) && 8571 tpacpi_is_fw_digit(s[1]) && 8572 s[2] == t && 8573 (s[3] == 'T' || s[3] == 'N') && 8574 tpacpi_is_fw_digit(s[4]) && 8575 tpacpi_is_fw_digit(s[5]); 8576 } 8577 8578 /* returns 0 - probe ok, or < 0 - probe error. 8579 * Probe ok doesn't mean thinkpad found. 8580 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 8581 static int __must_check __init get_thinkpad_model_data( 8582 struct thinkpad_id_data *tp) 8583 { 8584 const struct dmi_device *dev = NULL; 8585 char ec_fw_string[18]; 8586 char const *s; 8587 8588 if (!tp) 8589 return -EINVAL; 8590 8591 memset(tp, 0, sizeof(*tp)); 8592 8593 if (dmi_name_in_vendors("IBM")) 8594 tp->vendor = PCI_VENDOR_ID_IBM; 8595 else if (dmi_name_in_vendors("LENOVO")) 8596 tp->vendor = PCI_VENDOR_ID_LENOVO; 8597 else 8598 return 0; 8599 8600 s = dmi_get_system_info(DMI_BIOS_VERSION); 8601 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 8602 if (s && !tp->bios_version_str) 8603 return -ENOMEM; 8604 8605 /* Really ancient ThinkPad 240X will fail this, which is fine */ 8606 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') || 8607 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C'))) 8608 return 0; 8609 8610 tp->bios_model = tp->bios_version_str[0] 8611 | (tp->bios_version_str[1] << 8); 8612 tp->bios_release = (tp->bios_version_str[4] << 8) 8613 | tp->bios_version_str[5]; 8614 8615 /* 8616 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 8617 * X32 or newer, all Z series; Some models must have an 8618 * up-to-date BIOS or they will not be detected. 8619 * 8620 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 8621 */ 8622 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 8623 if (sscanf(dev->name, 8624 "IBM ThinkPad Embedded Controller -[%17c", 8625 ec_fw_string) == 1) { 8626 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 8627 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 8628 8629 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 8630 if (!tp->ec_version_str) 8631 return -ENOMEM; 8632 8633 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 8634 tp->ec_model = ec_fw_string[0] 8635 | (ec_fw_string[1] << 8); 8636 tp->ec_release = (ec_fw_string[4] << 8) 8637 | ec_fw_string[5]; 8638 } else { 8639 pr_notice("ThinkPad firmware release %s " 8640 "doesn't match the known patterns\n", 8641 ec_fw_string); 8642 pr_notice("please report this to %s\n", 8643 TPACPI_MAIL); 8644 } 8645 break; 8646 } 8647 } 8648 8649 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 8650 if (s && !(strnicmp(s, "ThinkPad", 8) && strnicmp(s, "Lenovo", 6))) { 8651 tp->model_str = kstrdup(s, GFP_KERNEL); 8652 if (!tp->model_str) 8653 return -ENOMEM; 8654 } else { 8655 s = dmi_get_system_info(DMI_BIOS_VENDOR); 8656 if (s && !(strnicmp(s, "Lenovo", 6))) { 8657 tp->model_str = kstrdup(s, GFP_KERNEL); 8658 if (!tp->model_str) 8659 return -ENOMEM; 8660 } 8661 } 8662 8663 s = dmi_get_system_info(DMI_PRODUCT_NAME); 8664 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 8665 if (s && !tp->nummodel_str) 8666 return -ENOMEM; 8667 8668 return 0; 8669 } 8670 8671 static int __init probe_for_thinkpad(void) 8672 { 8673 int is_thinkpad; 8674 8675 if (acpi_disabled) 8676 return -ENODEV; 8677 8678 /* It would be dangerous to run the driver in this case */ 8679 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 8680 return -ENODEV; 8681 8682 /* 8683 * Non-ancient models have better DMI tagging, but very old models 8684 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 8685 */ 8686 is_thinkpad = (thinkpad_id.model_str != NULL) || 8687 (thinkpad_id.ec_model != 0) || 8688 tpacpi_is_fw_known(); 8689 8690 /* The EC handler is required */ 8691 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 8692 if (!ec_handle) { 8693 if (is_thinkpad) 8694 pr_err("Not yet supported ThinkPad detected!\n"); 8695 return -ENODEV; 8696 } 8697 8698 if (!is_thinkpad && !force_load) 8699 return -ENODEV; 8700 8701 return 0; 8702 } 8703 8704 static void __init thinkpad_acpi_init_banner(void) 8705 { 8706 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 8707 pr_info("%s\n", TPACPI_URL); 8708 8709 pr_info("ThinkPad BIOS %s, EC %s\n", 8710 (thinkpad_id.bios_version_str) ? 8711 thinkpad_id.bios_version_str : "unknown", 8712 (thinkpad_id.ec_version_str) ? 8713 thinkpad_id.ec_version_str : "unknown"); 8714 8715 BUG_ON(!thinkpad_id.vendor); 8716 8717 if (thinkpad_id.model_str) 8718 pr_info("%s %s, model %s\n", 8719 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 8720 "IBM" : ((thinkpad_id.vendor == 8721 PCI_VENDOR_ID_LENOVO) ? 8722 "Lenovo" : "Unknown vendor"), 8723 thinkpad_id.model_str, 8724 (thinkpad_id.nummodel_str) ? 8725 thinkpad_id.nummodel_str : "unknown"); 8726 } 8727 8728 /* Module init, exit, parameters */ 8729 8730 static struct ibm_init_struct ibms_init[] __initdata = { 8731 { 8732 .data = &thinkpad_acpi_driver_data, 8733 }, 8734 { 8735 .init = hotkey_init, 8736 .data = &hotkey_driver_data, 8737 }, 8738 { 8739 .init = bluetooth_init, 8740 .data = &bluetooth_driver_data, 8741 }, 8742 { 8743 .init = wan_init, 8744 .data = &wan_driver_data, 8745 }, 8746 { 8747 .init = uwb_init, 8748 .data = &uwb_driver_data, 8749 }, 8750 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 8751 { 8752 .init = video_init, 8753 .base_procfs_mode = S_IRUSR, 8754 .data = &video_driver_data, 8755 }, 8756 #endif 8757 { 8758 .init = light_init, 8759 .data = &light_driver_data, 8760 }, 8761 { 8762 .init = cmos_init, 8763 .data = &cmos_driver_data, 8764 }, 8765 { 8766 .init = led_init, 8767 .data = &led_driver_data, 8768 }, 8769 { 8770 .init = beep_init, 8771 .data = &beep_driver_data, 8772 }, 8773 { 8774 .init = thermal_init, 8775 .data = &thermal_driver_data, 8776 }, 8777 { 8778 .init = brightness_init, 8779 .data = &brightness_driver_data, 8780 }, 8781 { 8782 .init = volume_init, 8783 .data = &volume_driver_data, 8784 }, 8785 { 8786 .init = fan_init, 8787 .data = &fan_driver_data, 8788 }, 8789 }; 8790 8791 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 8792 { 8793 unsigned int i; 8794 struct ibm_struct *ibm; 8795 8796 if (!kp || !kp->name || !val) 8797 return -EINVAL; 8798 8799 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 8800 ibm = ibms_init[i].data; 8801 WARN_ON(ibm == NULL); 8802 8803 if (!ibm || !ibm->name) 8804 continue; 8805 8806 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 8807 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 8808 return -ENOSPC; 8809 strcpy(ibms_init[i].param, val); 8810 strcat(ibms_init[i].param, ","); 8811 return 0; 8812 } 8813 } 8814 8815 return -EINVAL; 8816 } 8817 8818 module_param(experimental, int, 0444); 8819 MODULE_PARM_DESC(experimental, 8820 "Enables experimental features when non-zero"); 8821 8822 module_param_named(debug, dbg_level, uint, 0); 8823 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 8824 8825 module_param(force_load, bool, 0444); 8826 MODULE_PARM_DESC(force_load, 8827 "Attempts to load the driver even on a " 8828 "mis-identified ThinkPad when true"); 8829 8830 module_param_named(fan_control, fan_control_allowed, bool, 0444); 8831 MODULE_PARM_DESC(fan_control, 8832 "Enables setting fan parameters features when true"); 8833 8834 module_param_named(brightness_mode, brightness_mode, uint, 0444); 8835 MODULE_PARM_DESC(brightness_mode, 8836 "Selects brightness control strategy: " 8837 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 8838 8839 module_param(brightness_enable, uint, 0444); 8840 MODULE_PARM_DESC(brightness_enable, 8841 "Enables backlight control when 1, disables when 0"); 8842 8843 module_param(hotkey_report_mode, uint, 0444); 8844 MODULE_PARM_DESC(hotkey_report_mode, 8845 "used for backwards compatibility with userspace, " 8846 "see documentation"); 8847 8848 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 8849 module_param_named(volume_mode, volume_mode, uint, 0444); 8850 MODULE_PARM_DESC(volume_mode, 8851 "Selects volume control strategy: " 8852 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 8853 8854 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 8855 MODULE_PARM_DESC(volume_capabilities, 8856 "Selects the mixer capabilites: " 8857 "0=auto, 1=volume and mute, 2=mute only"); 8858 8859 module_param_named(volume_control, volume_control_allowed, bool, 0444); 8860 MODULE_PARM_DESC(volume_control, 8861 "Enables software override for the console audio " 8862 "control when true"); 8863 8864 /* ALSA module API parameters */ 8865 module_param_named(index, alsa_index, int, 0444); 8866 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 8867 module_param_named(id, alsa_id, charp, 0444); 8868 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 8869 module_param_named(enable, alsa_enable, bool, 0444); 8870 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 8871 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 8872 8873 #define TPACPI_PARAM(feature) \ 8874 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 8875 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 8876 "at module load, see documentation") 8877 8878 TPACPI_PARAM(hotkey); 8879 TPACPI_PARAM(bluetooth); 8880 TPACPI_PARAM(video); 8881 TPACPI_PARAM(light); 8882 TPACPI_PARAM(cmos); 8883 TPACPI_PARAM(led); 8884 TPACPI_PARAM(beep); 8885 TPACPI_PARAM(brightness); 8886 TPACPI_PARAM(volume); 8887 TPACPI_PARAM(fan); 8888 8889 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 8890 module_param(dbg_wlswemul, uint, 0444); 8891 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 8892 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 8893 MODULE_PARM_DESC(wlsw_state, 8894 "Initial state of the emulated WLSW switch"); 8895 8896 module_param(dbg_bluetoothemul, uint, 0444); 8897 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 8898 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 8899 MODULE_PARM_DESC(bluetooth_state, 8900 "Initial state of the emulated bluetooth switch"); 8901 8902 module_param(dbg_wwanemul, uint, 0444); 8903 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 8904 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 8905 MODULE_PARM_DESC(wwan_state, 8906 "Initial state of the emulated WWAN switch"); 8907 8908 module_param(dbg_uwbemul, uint, 0444); 8909 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 8910 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 8911 MODULE_PARM_DESC(uwb_state, 8912 "Initial state of the emulated UWB switch"); 8913 #endif 8914 8915 static void thinkpad_acpi_module_exit(void) 8916 { 8917 struct ibm_struct *ibm, *itmp; 8918 8919 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 8920 8921 list_for_each_entry_safe_reverse(ibm, itmp, 8922 &tpacpi_all_drivers, 8923 all_drivers) { 8924 ibm_exit(ibm); 8925 } 8926 8927 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 8928 8929 if (tpacpi_inputdev) { 8930 if (tp_features.input_device_registered) 8931 input_unregister_device(tpacpi_inputdev); 8932 else 8933 input_free_device(tpacpi_inputdev); 8934 kfree(hotkey_keycode_map); 8935 } 8936 8937 if (tpacpi_hwmon) 8938 hwmon_device_unregister(tpacpi_hwmon); 8939 8940 if (tp_features.sensors_pdev_attrs_registered) 8941 device_remove_file(&tpacpi_sensors_pdev->dev, 8942 &dev_attr_thinkpad_acpi_pdev_name); 8943 if (tpacpi_sensors_pdev) 8944 platform_device_unregister(tpacpi_sensors_pdev); 8945 if (tpacpi_pdev) 8946 platform_device_unregister(tpacpi_pdev); 8947 8948 if (tp_features.sensors_pdrv_attrs_registered) 8949 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 8950 if (tp_features.platform_drv_attrs_registered) 8951 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 8952 8953 if (tp_features.sensors_pdrv_registered) 8954 platform_driver_unregister(&tpacpi_hwmon_pdriver); 8955 8956 if (tp_features.platform_drv_registered) 8957 platform_driver_unregister(&tpacpi_pdriver); 8958 8959 if (proc_dir) 8960 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 8961 8962 if (tpacpi_wq) 8963 destroy_workqueue(tpacpi_wq); 8964 8965 kfree(thinkpad_id.bios_version_str); 8966 kfree(thinkpad_id.ec_version_str); 8967 kfree(thinkpad_id.model_str); 8968 kfree(thinkpad_id.nummodel_str); 8969 } 8970 8971 8972 static int __init thinkpad_acpi_module_init(void) 8973 { 8974 int ret, i; 8975 8976 tpacpi_lifecycle = TPACPI_LIFE_INIT; 8977 8978 /* Parameter checking */ 8979 if (hotkey_report_mode > 2) 8980 return -EINVAL; 8981 8982 /* Driver-level probe */ 8983 8984 ret = get_thinkpad_model_data(&thinkpad_id); 8985 if (ret) { 8986 pr_err("unable to get DMI data: %d\n", ret); 8987 thinkpad_acpi_module_exit(); 8988 return ret; 8989 } 8990 ret = probe_for_thinkpad(); 8991 if (ret) { 8992 thinkpad_acpi_module_exit(); 8993 return ret; 8994 } 8995 8996 /* Driver initialization */ 8997 8998 thinkpad_acpi_init_banner(); 8999 tpacpi_check_outdated_fw(); 9000 9001 TPACPI_ACPIHANDLE_INIT(ecrd); 9002 TPACPI_ACPIHANDLE_INIT(ecwr); 9003 9004 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 9005 if (!tpacpi_wq) { 9006 thinkpad_acpi_module_exit(); 9007 return -ENOMEM; 9008 } 9009 9010 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 9011 if (!proc_dir) { 9012 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 9013 thinkpad_acpi_module_exit(); 9014 return -ENODEV; 9015 } 9016 9017 ret = platform_driver_register(&tpacpi_pdriver); 9018 if (ret) { 9019 pr_err("unable to register main platform driver\n"); 9020 thinkpad_acpi_module_exit(); 9021 return ret; 9022 } 9023 tp_features.platform_drv_registered = 1; 9024 9025 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 9026 if (ret) { 9027 pr_err("unable to register hwmon platform driver\n"); 9028 thinkpad_acpi_module_exit(); 9029 return ret; 9030 } 9031 tp_features.sensors_pdrv_registered = 1; 9032 9033 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 9034 if (!ret) { 9035 tp_features.platform_drv_attrs_registered = 1; 9036 ret = tpacpi_create_driver_attributes( 9037 &tpacpi_hwmon_pdriver.driver); 9038 } 9039 if (ret) { 9040 pr_err("unable to create sysfs driver attributes\n"); 9041 thinkpad_acpi_module_exit(); 9042 return ret; 9043 } 9044 tp_features.sensors_pdrv_attrs_registered = 1; 9045 9046 9047 /* Device initialization */ 9048 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9049 NULL, 0); 9050 if (IS_ERR(tpacpi_pdev)) { 9051 ret = PTR_ERR(tpacpi_pdev); 9052 tpacpi_pdev = NULL; 9053 pr_err("unable to register platform device\n"); 9054 thinkpad_acpi_module_exit(); 9055 return ret; 9056 } 9057 tpacpi_sensors_pdev = platform_device_register_simple( 9058 TPACPI_HWMON_DRVR_NAME, 9059 -1, NULL, 0); 9060 if (IS_ERR(tpacpi_sensors_pdev)) { 9061 ret = PTR_ERR(tpacpi_sensors_pdev); 9062 tpacpi_sensors_pdev = NULL; 9063 pr_err("unable to register hwmon platform device\n"); 9064 thinkpad_acpi_module_exit(); 9065 return ret; 9066 } 9067 ret = device_create_file(&tpacpi_sensors_pdev->dev, 9068 &dev_attr_thinkpad_acpi_pdev_name); 9069 if (ret) { 9070 pr_err("unable to create sysfs hwmon device attributes\n"); 9071 thinkpad_acpi_module_exit(); 9072 return ret; 9073 } 9074 tp_features.sensors_pdev_attrs_registered = 1; 9075 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9076 if (IS_ERR(tpacpi_hwmon)) { 9077 ret = PTR_ERR(tpacpi_hwmon); 9078 tpacpi_hwmon = NULL; 9079 pr_err("unable to register hwmon device\n"); 9080 thinkpad_acpi_module_exit(); 9081 return ret; 9082 } 9083 mutex_init(&tpacpi_inputdev_send_mutex); 9084 tpacpi_inputdev = input_allocate_device(); 9085 if (!tpacpi_inputdev) { 9086 pr_err("unable to allocate input device\n"); 9087 thinkpad_acpi_module_exit(); 9088 return -ENOMEM; 9089 } else { 9090 /* Prepare input device, but don't register */ 9091 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9092 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9093 tpacpi_inputdev->id.bustype = BUS_HOST; 9094 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9095 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9096 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9097 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9098 } 9099 9100 /* Init subdriver dependencies */ 9101 tpacpi_detect_brightness_capabilities(); 9102 9103 /* Init subdrivers */ 9104 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9105 ret = ibm_init(&ibms_init[i]); 9106 if (ret >= 0 && *ibms_init[i].param) 9107 ret = ibms_init[i].data->write(ibms_init[i].param); 9108 if (ret < 0) { 9109 thinkpad_acpi_module_exit(); 9110 return ret; 9111 } 9112 } 9113 9114 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9115 9116 ret = input_register_device(tpacpi_inputdev); 9117 if (ret < 0) { 9118 pr_err("unable to register input device\n"); 9119 thinkpad_acpi_module_exit(); 9120 return ret; 9121 } else { 9122 tp_features.input_device_registered = 1; 9123 } 9124 9125 return 0; 9126 } 9127 9128 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9129 9130 /* 9131 * This will autoload the driver in almost every ThinkPad 9132 * in widespread use. 9133 * 9134 * Only _VERY_ old models, like the 240, 240x and 570 lack 9135 * the HKEY event interface. 9136 */ 9137 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9138 9139 /* 9140 * DMI matching for module autoloading 9141 * 9142 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9143 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9144 * 9145 * Only models listed in thinkwiki will be supported, so add yours 9146 * if it is not there yet. 9147 */ 9148 #define IBM_BIOS_MODULE_ALIAS(__type) \ 9149 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9150 9151 /* Ancient thinkpad BIOSes have to be identified by 9152 * BIOS type or model number, and there are far less 9153 * BIOS types than model numbers... */ 9154 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9155 9156 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9157 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9158 MODULE_DESCRIPTION(TPACPI_DESC); 9159 MODULE_VERSION(TPACPI_VERSION); 9160 MODULE_LICENSE("GPL"); 9161 9162 module_init(thinkpad_acpi_module_init); 9163 module_exit(thinkpad_acpi_module_exit); 9164