1 /* 2 * thinkpad_acpi.c - ThinkPad ACPI Extras 3 * 4 * 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net> 6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #define TPACPI_VERSION "0.25" 27 #define TPACPI_SYSFS_VERSION 0x020700 28 29 /* 30 * Changelog: 31 * 2007-10-20 changelog trimmed down 32 * 33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 34 * drivers/misc. 35 * 36 * 2006-11-22 0.13 new maintainer 37 * changelog now lives in git commit history, and will 38 * not be updated further in-file. 39 * 40 * 2005-03-17 0.11 support for 600e, 770x 41 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 42 * 43 * 2005-01-16 0.9 use MODULE_VERSION 44 * thanks to Henrik Brix Andersen <brix@gentoo.org> 45 * fix parameter passing on module loading 46 * thanks to Rusty Russell <rusty@rustcorp.com.au> 47 * thanks to Jim Radford <radford@blackbean.org> 48 * 2004-11-08 0.8 fix init error case, don't return from a macro 49 * thanks to Chris Wright <chrisw@osdl.org> 50 */ 51 52 #include <linux/kernel.h> 53 #include <linux/module.h> 54 #include <linux/init.h> 55 #include <linux/types.h> 56 #include <linux/string.h> 57 #include <linux/list.h> 58 #include <linux/mutex.h> 59 #include <linux/sched.h> 60 #include <linux/kthread.h> 61 #include <linux/freezer.h> 62 #include <linux/delay.h> 63 #include <linux/slab.h> 64 #include <linux/nvram.h> 65 #include <linux/proc_fs.h> 66 #include <linux/seq_file.h> 67 #include <linux/sysfs.h> 68 #include <linux/backlight.h> 69 #include <linux/fb.h> 70 #include <linux/platform_device.h> 71 #include <linux/hwmon.h> 72 #include <linux/hwmon-sysfs.h> 73 #include <linux/input.h> 74 #include <linux/leds.h> 75 #include <linux/rfkill.h> 76 #include <linux/dmi.h> 77 #include <linux/jiffies.h> 78 #include <linux/workqueue.h> 79 #include <linux/acpi.h> 80 #include <linux/pci_ids.h> 81 #include <linux/thinkpad_acpi.h> 82 #include <sound/core.h> 83 #include <sound/control.h> 84 #include <sound/initval.h> 85 #include <linux/uaccess.h> 86 #include <acpi/video.h> 87 88 /* ThinkPad CMOS commands */ 89 #define TP_CMOS_VOLUME_DOWN 0 90 #define TP_CMOS_VOLUME_UP 1 91 #define TP_CMOS_VOLUME_MUTE 2 92 #define TP_CMOS_BRIGHTNESS_UP 4 93 #define TP_CMOS_BRIGHTNESS_DOWN 5 94 #define TP_CMOS_THINKLIGHT_ON 12 95 #define TP_CMOS_THINKLIGHT_OFF 13 96 97 /* NVRAM Addresses */ 98 enum tp_nvram_addr { 99 TP_NVRAM_ADDR_HK2 = 0x57, 100 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 101 TP_NVRAM_ADDR_VIDEO = 0x59, 102 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 103 TP_NVRAM_ADDR_MIXER = 0x60, 104 }; 105 106 /* NVRAM bit masks */ 107 enum { 108 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 109 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 110 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 111 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 112 TP_NVRAM_MASK_THINKLIGHT = 0x10, 113 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 114 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 115 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 116 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 117 TP_NVRAM_MASK_MUTE = 0x40, 118 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 119 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 120 TP_NVRAM_POS_LEVEL_VOLUME = 0, 121 }; 122 123 /* Misc NVRAM-related */ 124 enum { 125 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 126 }; 127 128 /* ACPI HIDs */ 129 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 130 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 131 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID "LEN0268" 132 #define TPACPI_ACPI_EC_HID "PNP0C09" 133 134 /* Input IDs */ 135 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 136 #define TPACPI_HKEY_INPUT_VERSION 0x4101 137 138 /* ACPI \WGSV commands */ 139 enum { 140 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 141 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 142 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 143 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 144 }; 145 146 /* TP_ACPI_WGSV_GET_STATE bits */ 147 enum { 148 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 149 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 150 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 151 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 152 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 153 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 154 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 155 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 156 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 157 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 158 }; 159 160 /* HKEY events */ 161 enum tpacpi_hkey_event_t { 162 /* Hotkey-related */ 163 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 164 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 165 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 166 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 167 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 168 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 169 170 /* Reasons for waking up from S3/S4 */ 171 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 172 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 173 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 174 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 175 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 176 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 177 178 /* Auto-sleep after eject request */ 179 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 180 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 181 182 /* Misc bay events */ 183 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 184 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 185 or port replicator */ 186 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 187 dock or port replicator */ 188 189 /* User-interface events */ 190 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 191 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 192 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 193 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 194 TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016): 195 * enter/leave tablet mode 196 */ 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 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */ 205 206 /* Thermal events */ 207 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 208 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 209 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 210 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 211 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 212 213 /* AC-related events */ 214 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 215 216 /* Misc */ 217 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 218 }; 219 220 /**************************************************************************** 221 * Main driver 222 */ 223 224 #define TPACPI_NAME "thinkpad" 225 #define TPACPI_DESC "ThinkPad ACPI Extras" 226 #define TPACPI_FILE TPACPI_NAME "_acpi" 227 #define TPACPI_URL "http://ibm-acpi.sf.net/" 228 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 229 230 #define TPACPI_PROC_DIR "ibm" 231 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 232 #define TPACPI_DRVR_NAME TPACPI_FILE 233 #define TPACPI_DRVR_SHORTNAME "tpacpi" 234 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 235 236 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 237 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 238 239 #define TPACPI_MAX_ACPI_ARGS 3 240 241 /* Debugging printk groups */ 242 #define TPACPI_DBG_ALL 0xffff 243 #define TPACPI_DBG_DISCLOSETASK 0x8000 244 #define TPACPI_DBG_INIT 0x0001 245 #define TPACPI_DBG_EXIT 0x0002 246 #define TPACPI_DBG_RFKILL 0x0004 247 #define TPACPI_DBG_HKEY 0x0008 248 #define TPACPI_DBG_FAN 0x0010 249 #define TPACPI_DBG_BRGHT 0x0020 250 #define TPACPI_DBG_MIXER 0x0040 251 252 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 253 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 254 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 255 256 257 /**************************************************************************** 258 * Driver-wide structs and misc. variables 259 */ 260 261 struct ibm_struct; 262 263 struct tp_acpi_drv_struct { 264 const struct acpi_device_id *hid; 265 struct acpi_driver *driver; 266 267 void (*notify) (struct ibm_struct *, u32); 268 acpi_handle *handle; 269 u32 type; 270 struct acpi_device *device; 271 }; 272 273 struct ibm_struct { 274 char *name; 275 276 int (*read) (struct seq_file *); 277 int (*write) (char *); 278 void (*exit) (void); 279 void (*resume) (void); 280 void (*suspend) (void); 281 void (*shutdown) (void); 282 283 struct list_head all_drivers; 284 285 struct tp_acpi_drv_struct *acpi; 286 287 struct { 288 u8 acpi_driver_registered:1; 289 u8 acpi_notify_installed:1; 290 u8 proc_created:1; 291 u8 init_called:1; 292 u8 experimental:1; 293 } flags; 294 }; 295 296 struct ibm_init_struct { 297 char param[32]; 298 299 int (*init) (struct ibm_init_struct *); 300 umode_t base_procfs_mode; 301 struct ibm_struct *data; 302 }; 303 304 static struct { 305 u32 bluetooth:1; 306 u32 hotkey:1; 307 u32 hotkey_mask:1; 308 u32 hotkey_wlsw:1; 309 enum { 310 TP_HOTKEY_TABLET_NONE = 0, 311 TP_HOTKEY_TABLET_USES_MHKG, 312 /* X1 Yoga 2016, seen on BIOS N1FET44W */ 313 TP_HOTKEY_TABLET_USES_CMMD, 314 } hotkey_tablet; 315 u32 kbdlight:1; 316 u32 light:1; 317 u32 light_status:1; 318 u32 bright_acpimode:1; 319 u32 bright_unkfw:1; 320 u32 wan:1; 321 u32 uwb:1; 322 u32 fan_ctrl_status_undef:1; 323 u32 second_fan:1; 324 u32 beep_needs_two_args:1; 325 u32 mixer_no_level_control:1; 326 u32 input_device_registered:1; 327 u32 platform_drv_registered:1; 328 u32 platform_drv_attrs_registered:1; 329 u32 sensors_pdrv_registered:1; 330 u32 sensors_pdrv_attrs_registered:1; 331 u32 sensors_pdev_attrs_registered:1; 332 u32 hotkey_poll_active:1; 333 u32 has_adaptive_kbd:1; 334 } tp_features; 335 336 static struct { 337 u16 hotkey_mask_ff:1; 338 u16 volume_ctrl_forbidden:1; 339 } tp_warned; 340 341 struct thinkpad_id_data { 342 unsigned int vendor; /* ThinkPad vendor: 343 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 344 345 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 346 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 347 348 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 349 u16 ec_model; 350 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 351 u16 ec_release; 352 353 char *model_str; /* ThinkPad T43 */ 354 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 355 }; 356 static struct thinkpad_id_data thinkpad_id; 357 358 static enum { 359 TPACPI_LIFE_INIT = 0, 360 TPACPI_LIFE_RUNNING, 361 TPACPI_LIFE_EXITING, 362 } tpacpi_lifecycle; 363 364 static int experimental; 365 static u32 dbg_level; 366 367 static struct workqueue_struct *tpacpi_wq; 368 369 enum led_status_t { 370 TPACPI_LED_OFF = 0, 371 TPACPI_LED_ON, 372 TPACPI_LED_BLINK, 373 }; 374 375 /* Special LED class that can defer work */ 376 struct tpacpi_led_classdev { 377 struct led_classdev led_classdev; 378 struct work_struct work; 379 enum led_status_t new_state; 380 int led; 381 }; 382 383 /* brightness level capabilities */ 384 static unsigned int bright_maxlvl; /* 0 = unknown */ 385 386 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 387 static int dbg_wlswemul; 388 static bool tpacpi_wlsw_emulstate; 389 static int dbg_bluetoothemul; 390 static bool tpacpi_bluetooth_emulstate; 391 static int dbg_wwanemul; 392 static bool tpacpi_wwan_emulstate; 393 static int dbg_uwbemul; 394 static bool tpacpi_uwb_emulstate; 395 #endif 396 397 398 /************************************************************************* 399 * Debugging helpers 400 */ 401 402 #define dbg_printk(a_dbg_level, format, arg...) \ 403 do { \ 404 if (dbg_level & (a_dbg_level)) \ 405 printk(KERN_DEBUG pr_fmt("%s: " format), \ 406 __func__, ##arg); \ 407 } while (0) 408 409 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 410 #define vdbg_printk dbg_printk 411 static const char *str_supported(int is_supported); 412 #else 413 static inline const char *str_supported(int is_supported) { return ""; } 414 #define vdbg_printk(a_dbg_level, format, arg...) \ 415 do { if (0) no_printk(format, ##arg); } while (0) 416 #endif 417 418 static void tpacpi_log_usertask(const char * const what) 419 { 420 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 421 what, task_tgid_vnr(current)); 422 } 423 424 #define tpacpi_disclose_usertask(what, format, arg...) \ 425 do { \ 426 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 427 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 428 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 429 what, task_tgid_vnr(current), ## arg); \ 430 } \ 431 } while (0) 432 433 /* 434 * Quirk handling helpers 435 * 436 * ThinkPad IDs and versions seen in the field so far 437 * are two-characters from the set [0-9A-Z], i.e. base 36. 438 * 439 * We use values well outside that range as specials. 440 */ 441 442 #define TPACPI_MATCH_ANY 0xffffU 443 #define TPACPI_MATCH_UNKNOWN 0U 444 445 /* TPID('1', 'Y') == 0x5931 */ 446 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 447 448 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 449 { .vendor = PCI_VENDOR_ID_IBM, \ 450 .bios = TPID(__id1, __id2), \ 451 .ec = TPACPI_MATCH_ANY, \ 452 .quirks = (__quirk) } 453 454 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 455 { .vendor = PCI_VENDOR_ID_LENOVO, \ 456 .bios = TPID(__id1, __id2), \ 457 .ec = TPACPI_MATCH_ANY, \ 458 .quirks = (__quirk) } 459 460 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 461 { .vendor = PCI_VENDOR_ID_LENOVO, \ 462 .bios = TPACPI_MATCH_ANY, \ 463 .ec = TPID(__id1, __id2), \ 464 .quirks = (__quirk) } 465 466 struct tpacpi_quirk { 467 unsigned int vendor; 468 u16 bios; 469 u16 ec; 470 unsigned long quirks; 471 }; 472 473 /** 474 * tpacpi_check_quirks() - search BIOS/EC version on a list 475 * @qlist: array of &struct tpacpi_quirk 476 * @qlist_size: number of elements in @qlist 477 * 478 * Iterates over a quirks list until one is found that matches the 479 * ThinkPad's vendor, BIOS and EC model. 480 * 481 * Returns 0 if nothing matches, otherwise returns the quirks field of 482 * the matching &struct tpacpi_quirk entry. 483 * 484 * The match criteria is: vendor, ec and bios much match. 485 */ 486 static unsigned long __init tpacpi_check_quirks( 487 const struct tpacpi_quirk *qlist, 488 unsigned int qlist_size) 489 { 490 while (qlist_size) { 491 if ((qlist->vendor == thinkpad_id.vendor || 492 qlist->vendor == TPACPI_MATCH_ANY) && 493 (qlist->bios == thinkpad_id.bios_model || 494 qlist->bios == TPACPI_MATCH_ANY) && 495 (qlist->ec == thinkpad_id.ec_model || 496 qlist->ec == TPACPI_MATCH_ANY)) 497 return qlist->quirks; 498 499 qlist_size--; 500 qlist++; 501 } 502 return 0; 503 } 504 505 static inline bool __pure __init tpacpi_is_lenovo(void) 506 { 507 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 508 } 509 510 static inline bool __pure __init tpacpi_is_ibm(void) 511 { 512 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 513 } 514 515 /**************************************************************************** 516 **************************************************************************** 517 * 518 * ACPI Helpers and device model 519 * 520 **************************************************************************** 521 ****************************************************************************/ 522 523 /************************************************************************* 524 * ACPI basic handles 525 */ 526 527 static acpi_handle root_handle; 528 static acpi_handle ec_handle; 529 530 #define TPACPI_HANDLE(object, parent, paths...) \ 531 static acpi_handle object##_handle; \ 532 static const acpi_handle * const object##_parent __initconst = \ 533 &parent##_handle; \ 534 static char *object##_paths[] __initdata = { paths } 535 536 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 537 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 538 539 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 540 /* T4x, X31, X40 */ 541 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 542 "\\CMS", /* R40, R40e */ 543 ); /* all others */ 544 545 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 546 "^HKEY", /* R30, R31 */ 547 "HKEY", /* all others */ 548 ); /* 570 */ 549 550 /************************************************************************* 551 * ACPI helpers 552 */ 553 554 static int acpi_evalf(acpi_handle handle, 555 int *res, char *method, char *fmt, ...) 556 { 557 char *fmt0 = fmt; 558 struct acpi_object_list params; 559 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 560 struct acpi_buffer result, *resultp; 561 union acpi_object out_obj; 562 acpi_status status; 563 va_list ap; 564 char res_type; 565 int success; 566 int quiet; 567 568 if (!*fmt) { 569 pr_err("acpi_evalf() called with empty format\n"); 570 return 0; 571 } 572 573 if (*fmt == 'q') { 574 quiet = 1; 575 fmt++; 576 } else 577 quiet = 0; 578 579 res_type = *(fmt++); 580 581 params.count = 0; 582 params.pointer = &in_objs[0]; 583 584 va_start(ap, fmt); 585 while (*fmt) { 586 char c = *(fmt++); 587 switch (c) { 588 case 'd': /* int */ 589 in_objs[params.count].integer.value = va_arg(ap, int); 590 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 591 break; 592 /* add more types as needed */ 593 default: 594 pr_err("acpi_evalf() called " 595 "with invalid format character '%c'\n", c); 596 va_end(ap); 597 return 0; 598 } 599 } 600 va_end(ap); 601 602 if (res_type != 'v') { 603 result.length = sizeof(out_obj); 604 result.pointer = &out_obj; 605 resultp = &result; 606 } else 607 resultp = NULL; 608 609 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 610 611 switch (res_type) { 612 case 'd': /* int */ 613 success = (status == AE_OK && 614 out_obj.type == ACPI_TYPE_INTEGER); 615 if (success && res) 616 *res = out_obj.integer.value; 617 break; 618 case 'v': /* void */ 619 success = status == AE_OK; 620 break; 621 /* add more types as needed */ 622 default: 623 pr_err("acpi_evalf() called " 624 "with invalid format character '%c'\n", res_type); 625 return 0; 626 } 627 628 if (!success && !quiet) 629 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 630 method, fmt0, acpi_format_exception(status)); 631 632 return success; 633 } 634 635 static int acpi_ec_read(int i, u8 *p) 636 { 637 int v; 638 639 if (ecrd_handle) { 640 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 641 return 0; 642 *p = v; 643 } else { 644 if (ec_read(i, p) < 0) 645 return 0; 646 } 647 648 return 1; 649 } 650 651 static int acpi_ec_write(int i, u8 v) 652 { 653 if (ecwr_handle) { 654 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 655 return 0; 656 } else { 657 if (ec_write(i, v) < 0) 658 return 0; 659 } 660 661 return 1; 662 } 663 664 static int issue_thinkpad_cmos_command(int cmos_cmd) 665 { 666 if (!cmos_handle) 667 return -ENXIO; 668 669 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 670 return -EIO; 671 672 return 0; 673 } 674 675 /************************************************************************* 676 * ACPI device model 677 */ 678 679 #define TPACPI_ACPIHANDLE_INIT(object) \ 680 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 681 object##_paths, ARRAY_SIZE(object##_paths)) 682 683 static void __init drv_acpi_handle_init(const char *name, 684 acpi_handle *handle, const acpi_handle parent, 685 char **paths, const int num_paths) 686 { 687 int i; 688 acpi_status status; 689 690 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 691 name); 692 693 for (i = 0; i < num_paths; i++) { 694 status = acpi_get_handle(parent, paths[i], handle); 695 if (ACPI_SUCCESS(status)) { 696 dbg_printk(TPACPI_DBG_INIT, 697 "Found ACPI handle %s for %s\n", 698 paths[i], name); 699 return; 700 } 701 } 702 703 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 704 name); 705 *handle = NULL; 706 } 707 708 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 709 u32 level, void *context, void **return_value) 710 { 711 struct acpi_device *dev; 712 if (!strcmp(context, "video")) { 713 if (acpi_bus_get_device(handle, &dev)) 714 return AE_OK; 715 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 716 return AE_OK; 717 } 718 719 *(acpi_handle *)return_value = handle; 720 721 return AE_CTRL_TERMINATE; 722 } 723 724 static void __init tpacpi_acpi_handle_locate(const char *name, 725 const char *hid, 726 acpi_handle *handle) 727 { 728 acpi_status status; 729 acpi_handle device_found; 730 731 BUG_ON(!name || !handle); 732 vdbg_printk(TPACPI_DBG_INIT, 733 "trying to locate ACPI handle for %s, using HID %s\n", 734 name, hid ? hid : "NULL"); 735 736 memset(&device_found, 0, sizeof(device_found)); 737 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 738 (void *)name, &device_found); 739 740 *handle = NULL; 741 742 if (ACPI_SUCCESS(status)) { 743 *handle = device_found; 744 dbg_printk(TPACPI_DBG_INIT, 745 "Found ACPI handle for %s\n", name); 746 } else { 747 vdbg_printk(TPACPI_DBG_INIT, 748 "Could not locate an ACPI handle for %s: %s\n", 749 name, acpi_format_exception(status)); 750 } 751 } 752 753 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 754 { 755 struct ibm_struct *ibm = data; 756 757 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 758 return; 759 760 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 761 return; 762 763 ibm->acpi->notify(ibm, event); 764 } 765 766 static int __init setup_acpi_notify(struct ibm_struct *ibm) 767 { 768 acpi_status status; 769 int rc; 770 771 BUG_ON(!ibm->acpi); 772 773 if (!*ibm->acpi->handle) 774 return 0; 775 776 vdbg_printk(TPACPI_DBG_INIT, 777 "setting up ACPI notify for %s\n", ibm->name); 778 779 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 780 if (rc < 0) { 781 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 782 return -ENODEV; 783 } 784 785 ibm->acpi->device->driver_data = ibm; 786 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 787 TPACPI_ACPI_EVENT_PREFIX, 788 ibm->name); 789 790 status = acpi_install_notify_handler(*ibm->acpi->handle, 791 ibm->acpi->type, dispatch_acpi_notify, ibm); 792 if (ACPI_FAILURE(status)) { 793 if (status == AE_ALREADY_EXISTS) { 794 pr_notice("another device driver is already " 795 "handling %s events\n", ibm->name); 796 } else { 797 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 798 ibm->name, acpi_format_exception(status)); 799 } 800 return -ENODEV; 801 } 802 ibm->flags.acpi_notify_installed = 1; 803 return 0; 804 } 805 806 static int __init tpacpi_device_add(struct acpi_device *device) 807 { 808 return 0; 809 } 810 811 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 812 { 813 int rc; 814 815 dbg_printk(TPACPI_DBG_INIT, 816 "registering %s as an ACPI driver\n", ibm->name); 817 818 BUG_ON(!ibm->acpi); 819 820 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 821 if (!ibm->acpi->driver) { 822 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 823 return -ENOMEM; 824 } 825 826 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 827 ibm->acpi->driver->ids = ibm->acpi->hid; 828 829 ibm->acpi->driver->ops.add = &tpacpi_device_add; 830 831 rc = acpi_bus_register_driver(ibm->acpi->driver); 832 if (rc < 0) { 833 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 834 ibm->name, rc); 835 kfree(ibm->acpi->driver); 836 ibm->acpi->driver = NULL; 837 } else if (!rc) 838 ibm->flags.acpi_driver_registered = 1; 839 840 return rc; 841 } 842 843 844 /**************************************************************************** 845 **************************************************************************** 846 * 847 * Procfs Helpers 848 * 849 **************************************************************************** 850 ****************************************************************************/ 851 852 static int dispatch_proc_show(struct seq_file *m, void *v) 853 { 854 struct ibm_struct *ibm = m->private; 855 856 if (!ibm || !ibm->read) 857 return -EINVAL; 858 return ibm->read(m); 859 } 860 861 static int dispatch_proc_open(struct inode *inode, struct file *file) 862 { 863 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 864 } 865 866 static ssize_t dispatch_proc_write(struct file *file, 867 const char __user *userbuf, 868 size_t count, loff_t *pos) 869 { 870 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 871 char *kernbuf; 872 int ret; 873 874 if (!ibm || !ibm->write) 875 return -EINVAL; 876 if (count > PAGE_SIZE - 2) 877 return -EINVAL; 878 879 kernbuf = kmalloc(count + 2, GFP_KERNEL); 880 if (!kernbuf) 881 return -ENOMEM; 882 883 if (copy_from_user(kernbuf, userbuf, count)) { 884 kfree(kernbuf); 885 return -EFAULT; 886 } 887 888 kernbuf[count] = 0; 889 strcat(kernbuf, ","); 890 ret = ibm->write(kernbuf); 891 if (ret == 0) 892 ret = count; 893 894 kfree(kernbuf); 895 896 return ret; 897 } 898 899 static const struct file_operations dispatch_proc_fops = { 900 .owner = THIS_MODULE, 901 .open = dispatch_proc_open, 902 .read = seq_read, 903 .llseek = seq_lseek, 904 .release = single_release, 905 .write = dispatch_proc_write, 906 }; 907 908 static char *next_cmd(char **cmds) 909 { 910 char *start = *cmds; 911 char *end; 912 913 while ((end = strchr(start, ',')) && end == start) 914 start = end + 1; 915 916 if (!end) 917 return NULL; 918 919 *end = 0; 920 *cmds = end + 1; 921 return start; 922 } 923 924 925 /**************************************************************************** 926 **************************************************************************** 927 * 928 * Device model: input, hwmon and platform 929 * 930 **************************************************************************** 931 ****************************************************************************/ 932 933 static struct platform_device *tpacpi_pdev; 934 static struct platform_device *tpacpi_sensors_pdev; 935 static struct device *tpacpi_hwmon; 936 static struct input_dev *tpacpi_inputdev; 937 static struct mutex tpacpi_inputdev_send_mutex; 938 static LIST_HEAD(tpacpi_all_drivers); 939 940 #ifdef CONFIG_PM_SLEEP 941 static int tpacpi_suspend_handler(struct device *dev) 942 { 943 struct ibm_struct *ibm, *itmp; 944 945 list_for_each_entry_safe(ibm, itmp, 946 &tpacpi_all_drivers, 947 all_drivers) { 948 if (ibm->suspend) 949 (ibm->suspend)(); 950 } 951 952 return 0; 953 } 954 955 static int tpacpi_resume_handler(struct device *dev) 956 { 957 struct ibm_struct *ibm, *itmp; 958 959 list_for_each_entry_safe(ibm, itmp, 960 &tpacpi_all_drivers, 961 all_drivers) { 962 if (ibm->resume) 963 (ibm->resume)(); 964 } 965 966 return 0; 967 } 968 #endif 969 970 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 971 tpacpi_suspend_handler, tpacpi_resume_handler); 972 973 static void tpacpi_shutdown_handler(struct platform_device *pdev) 974 { 975 struct ibm_struct *ibm, *itmp; 976 977 list_for_each_entry_safe(ibm, itmp, 978 &tpacpi_all_drivers, 979 all_drivers) { 980 if (ibm->shutdown) 981 (ibm->shutdown)(); 982 } 983 } 984 985 static struct platform_driver tpacpi_pdriver = { 986 .driver = { 987 .name = TPACPI_DRVR_NAME, 988 .pm = &tpacpi_pm, 989 }, 990 .shutdown = tpacpi_shutdown_handler, 991 }; 992 993 static struct platform_driver tpacpi_hwmon_pdriver = { 994 .driver = { 995 .name = TPACPI_HWMON_DRVR_NAME, 996 }, 997 }; 998 999 /************************************************************************* 1000 * sysfs support helpers 1001 */ 1002 1003 struct attribute_set { 1004 unsigned int members, max_members; 1005 struct attribute_group group; 1006 }; 1007 1008 struct attribute_set_obj { 1009 struct attribute_set s; 1010 struct attribute *a; 1011 } __attribute__((packed)); 1012 1013 static struct attribute_set *create_attr_set(unsigned int max_members, 1014 const char *name) 1015 { 1016 struct attribute_set_obj *sobj; 1017 1018 if (max_members == 0) 1019 return NULL; 1020 1021 /* Allocates space for implicit NULL at the end too */ 1022 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1023 max_members * sizeof(struct attribute *), 1024 GFP_KERNEL); 1025 if (!sobj) 1026 return NULL; 1027 sobj->s.max_members = max_members; 1028 sobj->s.group.attrs = &sobj->a; 1029 sobj->s.group.name = name; 1030 1031 return &sobj->s; 1032 } 1033 1034 #define destroy_attr_set(_set) \ 1035 kfree(_set); 1036 1037 /* not multi-threaded safe, use it in a single thread per set */ 1038 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1039 { 1040 if (!s || !attr) 1041 return -EINVAL; 1042 1043 if (s->members >= s->max_members) 1044 return -ENOMEM; 1045 1046 s->group.attrs[s->members] = attr; 1047 s->members++; 1048 1049 return 0; 1050 } 1051 1052 static int add_many_to_attr_set(struct attribute_set *s, 1053 struct attribute **attr, 1054 unsigned int count) 1055 { 1056 int i, res; 1057 1058 for (i = 0; i < count; i++) { 1059 res = add_to_attr_set(s, attr[i]); 1060 if (res) 1061 return res; 1062 } 1063 1064 return 0; 1065 } 1066 1067 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1068 { 1069 sysfs_remove_group(kobj, &s->group); 1070 destroy_attr_set(s); 1071 } 1072 1073 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1074 sysfs_create_group(_kobj, &_attr_set->group) 1075 1076 static int parse_strtoul(const char *buf, 1077 unsigned long max, unsigned long *value) 1078 { 1079 char *endp; 1080 1081 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1082 endp = skip_spaces(endp); 1083 if (*endp || *value > max) 1084 return -EINVAL; 1085 1086 return 0; 1087 } 1088 1089 static void tpacpi_disable_brightness_delay(void) 1090 { 1091 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1092 pr_notice("ACPI backlight control delay disabled\n"); 1093 } 1094 1095 static void printk_deprecated_attribute(const char * const what, 1096 const char * const details) 1097 { 1098 tpacpi_log_usertask("deprecated sysfs attribute"); 1099 pr_warn("WARNING: sysfs attribute %s is deprecated and " 1100 "will be removed. %s\n", 1101 what, details); 1102 } 1103 1104 /************************************************************************* 1105 * rfkill and radio control support helpers 1106 */ 1107 1108 /* 1109 * ThinkPad-ACPI firmware handling model: 1110 * 1111 * WLSW (master wireless switch) is event-driven, and is common to all 1112 * firmware-controlled radios. It cannot be controlled, just monitored, 1113 * as expected. It overrides all radio state in firmware 1114 * 1115 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1116 * (TODO: verify how WLSW interacts with the returned radio state). 1117 * 1118 * The only time there are shadow radio state changes, is when 1119 * masked-off hotkeys are used. 1120 */ 1121 1122 /* 1123 * Internal driver API for radio state: 1124 * 1125 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1126 * bool: true means radio blocked (off) 1127 */ 1128 enum tpacpi_rfkill_state { 1129 TPACPI_RFK_RADIO_OFF = 0, 1130 TPACPI_RFK_RADIO_ON 1131 }; 1132 1133 /* rfkill switches */ 1134 enum tpacpi_rfk_id { 1135 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1136 TPACPI_RFK_WWAN_SW_ID, 1137 TPACPI_RFK_UWB_SW_ID, 1138 TPACPI_RFK_SW_MAX 1139 }; 1140 1141 static const char *tpacpi_rfkill_names[] = { 1142 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1143 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1144 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1145 [TPACPI_RFK_SW_MAX] = NULL 1146 }; 1147 1148 /* ThinkPad-ACPI rfkill subdriver */ 1149 struct tpacpi_rfk { 1150 struct rfkill *rfkill; 1151 enum tpacpi_rfk_id id; 1152 const struct tpacpi_rfk_ops *ops; 1153 }; 1154 1155 struct tpacpi_rfk_ops { 1156 /* firmware interface */ 1157 int (*get_status)(void); 1158 int (*set_status)(const enum tpacpi_rfkill_state); 1159 }; 1160 1161 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1162 1163 /* Query FW and update rfkill sw state for a given rfkill switch */ 1164 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1165 { 1166 int status; 1167 1168 if (!tp_rfk) 1169 return -ENODEV; 1170 1171 status = (tp_rfk->ops->get_status)(); 1172 if (status < 0) 1173 return status; 1174 1175 rfkill_set_sw_state(tp_rfk->rfkill, 1176 (status == TPACPI_RFK_RADIO_OFF)); 1177 1178 return status; 1179 } 1180 1181 /* Query FW and update rfkill sw state for all rfkill switches */ 1182 static void tpacpi_rfk_update_swstate_all(void) 1183 { 1184 unsigned int i; 1185 1186 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1187 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1188 } 1189 1190 /* 1191 * Sync the HW-blocking state of all rfkill switches, 1192 * do notice it causes the rfkill core to schedule uevents 1193 */ 1194 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1195 { 1196 unsigned int i; 1197 struct tpacpi_rfk *tp_rfk; 1198 1199 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1200 tp_rfk = tpacpi_rfkill_switches[i]; 1201 if (tp_rfk) { 1202 if (rfkill_set_hw_state(tp_rfk->rfkill, 1203 blocked)) { 1204 /* ignore -- we track sw block */ 1205 } 1206 } 1207 } 1208 } 1209 1210 /* Call to get the WLSW state from the firmware */ 1211 static int hotkey_get_wlsw(void); 1212 1213 /* Call to query WLSW state and update all rfkill switches */ 1214 static bool tpacpi_rfk_check_hwblock_state(void) 1215 { 1216 int res = hotkey_get_wlsw(); 1217 int hw_blocked; 1218 1219 /* When unknown or unsupported, we have to assume it is unblocked */ 1220 if (res < 0) 1221 return false; 1222 1223 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1224 tpacpi_rfk_update_hwblock_state(hw_blocked); 1225 1226 return hw_blocked; 1227 } 1228 1229 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1230 { 1231 struct tpacpi_rfk *tp_rfk = data; 1232 int res; 1233 1234 dbg_printk(TPACPI_DBG_RFKILL, 1235 "request to change radio state to %s\n", 1236 blocked ? "blocked" : "unblocked"); 1237 1238 /* try to set radio state */ 1239 res = (tp_rfk->ops->set_status)(blocked ? 1240 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1241 1242 /* and update the rfkill core with whatever the FW really did */ 1243 tpacpi_rfk_update_swstate(tp_rfk); 1244 1245 return (res < 0) ? res : 0; 1246 } 1247 1248 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1249 .set_block = tpacpi_rfk_hook_set_block, 1250 }; 1251 1252 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1253 const struct tpacpi_rfk_ops *tp_rfkops, 1254 const enum rfkill_type rfktype, 1255 const char *name, 1256 const bool set_default) 1257 { 1258 struct tpacpi_rfk *atp_rfk; 1259 int res; 1260 bool sw_state = false; 1261 bool hw_state; 1262 int sw_status; 1263 1264 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1265 1266 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1267 if (atp_rfk) 1268 atp_rfk->rfkill = rfkill_alloc(name, 1269 &tpacpi_pdev->dev, 1270 rfktype, 1271 &tpacpi_rfk_rfkill_ops, 1272 atp_rfk); 1273 if (!atp_rfk || !atp_rfk->rfkill) { 1274 pr_err("failed to allocate memory for rfkill class\n"); 1275 kfree(atp_rfk); 1276 return -ENOMEM; 1277 } 1278 1279 atp_rfk->id = id; 1280 atp_rfk->ops = tp_rfkops; 1281 1282 sw_status = (tp_rfkops->get_status)(); 1283 if (sw_status < 0) { 1284 pr_err("failed to read initial state for %s, error %d\n", 1285 name, sw_status); 1286 } else { 1287 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1288 if (set_default) { 1289 /* try to keep the initial state, since we ask the 1290 * firmware to preserve it across S5 in NVRAM */ 1291 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1292 } 1293 } 1294 hw_state = tpacpi_rfk_check_hwblock_state(); 1295 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1296 1297 res = rfkill_register(atp_rfk->rfkill); 1298 if (res < 0) { 1299 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1300 rfkill_destroy(atp_rfk->rfkill); 1301 kfree(atp_rfk); 1302 return res; 1303 } 1304 1305 tpacpi_rfkill_switches[id] = atp_rfk; 1306 1307 pr_info("rfkill switch %s: radio is %sblocked\n", 1308 name, (sw_state || hw_state) ? "" : "un"); 1309 return 0; 1310 } 1311 1312 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1313 { 1314 struct tpacpi_rfk *tp_rfk; 1315 1316 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1317 1318 tp_rfk = tpacpi_rfkill_switches[id]; 1319 if (tp_rfk) { 1320 rfkill_unregister(tp_rfk->rfkill); 1321 rfkill_destroy(tp_rfk->rfkill); 1322 tpacpi_rfkill_switches[id] = NULL; 1323 kfree(tp_rfk); 1324 } 1325 } 1326 1327 static void printk_deprecated_rfkill_attribute(const char * const what) 1328 { 1329 printk_deprecated_attribute(what, 1330 "Please switch to generic rfkill before year 2010"); 1331 } 1332 1333 /* sysfs <radio> enable ------------------------------------------------ */ 1334 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1335 struct device_attribute *attr, 1336 char *buf) 1337 { 1338 int status; 1339 1340 printk_deprecated_rfkill_attribute(attr->attr.name); 1341 1342 /* This is in the ABI... */ 1343 if (tpacpi_rfk_check_hwblock_state()) { 1344 status = TPACPI_RFK_RADIO_OFF; 1345 } else { 1346 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1347 if (status < 0) 1348 return status; 1349 } 1350 1351 return snprintf(buf, PAGE_SIZE, "%d\n", 1352 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1353 } 1354 1355 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1356 struct device_attribute *attr, 1357 const char *buf, size_t count) 1358 { 1359 unsigned long t; 1360 int res; 1361 1362 printk_deprecated_rfkill_attribute(attr->attr.name); 1363 1364 if (parse_strtoul(buf, 1, &t)) 1365 return -EINVAL; 1366 1367 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1368 1369 /* This is in the ABI... */ 1370 if (tpacpi_rfk_check_hwblock_state() && !!t) 1371 return -EPERM; 1372 1373 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1374 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1375 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1376 1377 return (res < 0) ? res : count; 1378 } 1379 1380 /* procfs -------------------------------------------------------------- */ 1381 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1382 { 1383 if (id >= TPACPI_RFK_SW_MAX) 1384 seq_printf(m, "status:\t\tnot supported\n"); 1385 else { 1386 int status; 1387 1388 /* This is in the ABI... */ 1389 if (tpacpi_rfk_check_hwblock_state()) { 1390 status = TPACPI_RFK_RADIO_OFF; 1391 } else { 1392 status = tpacpi_rfk_update_swstate( 1393 tpacpi_rfkill_switches[id]); 1394 if (status < 0) 1395 return status; 1396 } 1397 1398 seq_printf(m, "status:\t\t%s\n", 1399 (status == TPACPI_RFK_RADIO_ON) ? 1400 "enabled" : "disabled"); 1401 seq_printf(m, "commands:\tenable, disable\n"); 1402 } 1403 1404 return 0; 1405 } 1406 1407 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1408 { 1409 char *cmd; 1410 int status = -1; 1411 int res = 0; 1412 1413 if (id >= TPACPI_RFK_SW_MAX) 1414 return -ENODEV; 1415 1416 while ((cmd = next_cmd(&buf))) { 1417 if (strlencmp(cmd, "enable") == 0) 1418 status = TPACPI_RFK_RADIO_ON; 1419 else if (strlencmp(cmd, "disable") == 0) 1420 status = TPACPI_RFK_RADIO_OFF; 1421 else 1422 return -EINVAL; 1423 } 1424 1425 if (status != -1) { 1426 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1427 (status == TPACPI_RFK_RADIO_ON) ? 1428 "enable" : "disable", 1429 tpacpi_rfkill_names[id]); 1430 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1431 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1432 } 1433 1434 return res; 1435 } 1436 1437 /************************************************************************* 1438 * thinkpad-acpi driver attributes 1439 */ 1440 1441 /* interface_version --------------------------------------------------- */ 1442 static ssize_t tpacpi_driver_interface_version_show( 1443 struct device_driver *drv, 1444 char *buf) 1445 { 1446 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1447 } 1448 1449 static DRIVER_ATTR(interface_version, S_IRUGO, 1450 tpacpi_driver_interface_version_show, NULL); 1451 1452 /* debug_level --------------------------------------------------------- */ 1453 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1454 char *buf) 1455 { 1456 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1457 } 1458 1459 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1460 const char *buf, size_t count) 1461 { 1462 unsigned long t; 1463 1464 if (parse_strtoul(buf, 0xffff, &t)) 1465 return -EINVAL; 1466 1467 dbg_level = t; 1468 1469 return count; 1470 } 1471 1472 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1473 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1474 1475 /* version ------------------------------------------------------------- */ 1476 static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1477 char *buf) 1478 { 1479 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1480 TPACPI_DESC, TPACPI_VERSION); 1481 } 1482 1483 static DRIVER_ATTR(version, S_IRUGO, 1484 tpacpi_driver_version_show, NULL); 1485 1486 /* --------------------------------------------------------------------- */ 1487 1488 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1489 1490 /* wlsw_emulstate ------------------------------------------------------ */ 1491 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1492 char *buf) 1493 { 1494 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1495 } 1496 1497 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1498 const char *buf, size_t count) 1499 { 1500 unsigned long t; 1501 1502 if (parse_strtoul(buf, 1, &t)) 1503 return -EINVAL; 1504 1505 if (tpacpi_wlsw_emulstate != !!t) { 1506 tpacpi_wlsw_emulstate = !!t; 1507 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1508 } 1509 1510 return count; 1511 } 1512 1513 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1514 tpacpi_driver_wlsw_emulstate_show, 1515 tpacpi_driver_wlsw_emulstate_store); 1516 1517 /* bluetooth_emulstate ------------------------------------------------- */ 1518 static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1519 struct device_driver *drv, 1520 char *buf) 1521 { 1522 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1523 } 1524 1525 static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1526 struct device_driver *drv, 1527 const char *buf, size_t count) 1528 { 1529 unsigned long t; 1530 1531 if (parse_strtoul(buf, 1, &t)) 1532 return -EINVAL; 1533 1534 tpacpi_bluetooth_emulstate = !!t; 1535 1536 return count; 1537 } 1538 1539 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1540 tpacpi_driver_bluetooth_emulstate_show, 1541 tpacpi_driver_bluetooth_emulstate_store); 1542 1543 /* wwan_emulstate ------------------------------------------------- */ 1544 static ssize_t tpacpi_driver_wwan_emulstate_show( 1545 struct device_driver *drv, 1546 char *buf) 1547 { 1548 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1549 } 1550 1551 static ssize_t tpacpi_driver_wwan_emulstate_store( 1552 struct device_driver *drv, 1553 const char *buf, size_t count) 1554 { 1555 unsigned long t; 1556 1557 if (parse_strtoul(buf, 1, &t)) 1558 return -EINVAL; 1559 1560 tpacpi_wwan_emulstate = !!t; 1561 1562 return count; 1563 } 1564 1565 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1566 tpacpi_driver_wwan_emulstate_show, 1567 tpacpi_driver_wwan_emulstate_store); 1568 1569 /* uwb_emulstate ------------------------------------------------- */ 1570 static ssize_t tpacpi_driver_uwb_emulstate_show( 1571 struct device_driver *drv, 1572 char *buf) 1573 { 1574 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1575 } 1576 1577 static ssize_t tpacpi_driver_uwb_emulstate_store( 1578 struct device_driver *drv, 1579 const char *buf, size_t count) 1580 { 1581 unsigned long t; 1582 1583 if (parse_strtoul(buf, 1, &t)) 1584 return -EINVAL; 1585 1586 tpacpi_uwb_emulstate = !!t; 1587 1588 return count; 1589 } 1590 1591 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1592 tpacpi_driver_uwb_emulstate_show, 1593 tpacpi_driver_uwb_emulstate_store); 1594 #endif 1595 1596 /* --------------------------------------------------------------------- */ 1597 1598 static struct driver_attribute *tpacpi_driver_attributes[] = { 1599 &driver_attr_debug_level, &driver_attr_version, 1600 &driver_attr_interface_version, 1601 }; 1602 1603 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1604 { 1605 int i, res; 1606 1607 i = 0; 1608 res = 0; 1609 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1610 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1611 i++; 1612 } 1613 1614 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1615 if (!res && dbg_wlswemul) 1616 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1617 if (!res && dbg_bluetoothemul) 1618 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1619 if (!res && dbg_wwanemul) 1620 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1621 if (!res && dbg_uwbemul) 1622 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1623 #endif 1624 1625 return res; 1626 } 1627 1628 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1629 { 1630 int i; 1631 1632 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1633 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1634 1635 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1636 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1637 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1638 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1639 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1640 #endif 1641 } 1642 1643 /************************************************************************* 1644 * Firmware Data 1645 */ 1646 1647 /* 1648 * Table of recommended minimum BIOS versions 1649 * 1650 * Reasons for listing: 1651 * 1. Stable BIOS, listed because the unknown amount of 1652 * bugs and bad ACPI behaviour on older versions 1653 * 1654 * 2. BIOS or EC fw with known bugs that trigger on Linux 1655 * 1656 * 3. BIOS with known reduced functionality in older versions 1657 * 1658 * We recommend the latest BIOS and EC version. 1659 * We only support the latest BIOS and EC fw version as a rule. 1660 * 1661 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1662 * Information from users in ThinkWiki 1663 * 1664 * WARNING: we use this table also to detect that the machine is 1665 * a ThinkPad in some cases, so don't remove entries lightly. 1666 */ 1667 1668 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1669 { .vendor = (__v), \ 1670 .bios = TPID(__id1, __id2), \ 1671 .ec = TPACPI_MATCH_ANY, \ 1672 .quirks = TPACPI_MATCH_ANY << 16 \ 1673 | (__bv1) << 8 | (__bv2) } 1674 1675 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1676 __eid, __ev1, __ev2) \ 1677 { .vendor = (__v), \ 1678 .bios = TPID(__bid1, __bid2), \ 1679 .ec = __eid, \ 1680 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1681 | (__bv1) << 8 | (__bv2) } 1682 1683 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1684 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1685 1686 /* Outdated IBM BIOSes often lack the EC id string */ 1687 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1688 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1689 __bv1, __bv2, TPID(__id1, __id2), \ 1690 __ev1, __ev2), \ 1691 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1692 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1693 __ev1, __ev2) 1694 1695 /* Outdated IBM BIOSes often lack the EC id string */ 1696 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1697 __eid1, __eid2, __ev1, __ev2) \ 1698 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1699 __bv1, __bv2, TPID(__eid1, __eid2), \ 1700 __ev1, __ev2), \ 1701 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1702 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1703 __ev1, __ev2) 1704 1705 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1706 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1707 1708 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1709 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1710 __bv1, __bv2, TPID(__id1, __id2), \ 1711 __ev1, __ev2) 1712 1713 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1714 __eid1, __eid2, __ev1, __ev2) \ 1715 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1716 __bv1, __bv2, TPID(__eid1, __eid2), \ 1717 __ev1, __ev2) 1718 1719 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1720 /* Numeric models ------------------ */ 1721 /* FW MODEL BIOS VERS */ 1722 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1723 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1724 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1725 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1726 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1727 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1728 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1729 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1730 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1731 1732 /* A-series ------------------------- */ 1733 /* FW MODEL BIOS VERS EC VERS */ 1734 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1735 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1736 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1737 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1738 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1739 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1740 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1741 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1742 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1743 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1744 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1745 1746 /* G-series ------------------------- */ 1747 /* FW MODEL BIOS VERS */ 1748 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1749 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1750 1751 /* R-series, T-series --------------- */ 1752 /* FW MODEL BIOS VERS EC VERS */ 1753 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1754 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1755 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1756 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1757 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1758 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1759 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1760 T40/p, T41/p, T42/p (1) */ 1761 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1762 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1763 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1764 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1765 1766 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1767 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1768 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1769 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1770 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1771 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1772 1773 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1774 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1775 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1776 1777 /* BIOS FW BIOS VERS EC FW EC VERS */ 1778 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1779 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1780 1781 /* X-series ------------------------- */ 1782 /* FW MODEL BIOS VERS EC VERS */ 1783 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1784 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1785 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1786 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1787 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1788 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1789 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1790 1791 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1792 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1793 1794 /* (0) - older versions lack DMI EC fw string and functionality */ 1795 /* (1) - older versions known to lack functionality */ 1796 }; 1797 1798 #undef TPV_QL1 1799 #undef TPV_QL0 1800 #undef TPV_QI2 1801 #undef TPV_QI1 1802 #undef TPV_QI0 1803 #undef TPV_Q_X 1804 #undef TPV_Q 1805 1806 static void __init tpacpi_check_outdated_fw(void) 1807 { 1808 unsigned long fwvers; 1809 u16 ec_version, bios_version; 1810 1811 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1812 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1813 1814 if (!fwvers) 1815 return; 1816 1817 bios_version = fwvers & 0xffffU; 1818 ec_version = (fwvers >> 16) & 0xffffU; 1819 1820 /* note that unknown versions are set to 0x0000 and we use that */ 1821 if ((bios_version > thinkpad_id.bios_release) || 1822 (ec_version > thinkpad_id.ec_release && 1823 ec_version != TPACPI_MATCH_ANY)) { 1824 /* 1825 * The changelogs would let us track down the exact 1826 * reason, but it is just too much of a pain to track 1827 * it. We only list BIOSes that are either really 1828 * broken, or really stable to begin with, so it is 1829 * best if the user upgrades the firmware anyway. 1830 */ 1831 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1832 pr_warn("WARNING: This firmware may be missing critical bug " 1833 "fixes and/or important features\n"); 1834 } 1835 } 1836 1837 static bool __init tpacpi_is_fw_known(void) 1838 { 1839 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1840 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1841 } 1842 1843 /**************************************************************************** 1844 **************************************************************************** 1845 * 1846 * Subdrivers 1847 * 1848 **************************************************************************** 1849 ****************************************************************************/ 1850 1851 /************************************************************************* 1852 * thinkpad-acpi metadata subdriver 1853 */ 1854 1855 static int thinkpad_acpi_driver_read(struct seq_file *m) 1856 { 1857 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1858 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1859 return 0; 1860 } 1861 1862 static struct ibm_struct thinkpad_acpi_driver_data = { 1863 .name = "driver", 1864 .read = thinkpad_acpi_driver_read, 1865 }; 1866 1867 /************************************************************************* 1868 * Hotkey subdriver 1869 */ 1870 1871 /* 1872 * ThinkPad firmware event model 1873 * 1874 * The ThinkPad firmware has two main event interfaces: normal ACPI 1875 * notifications (which follow the ACPI standard), and a private event 1876 * interface. 1877 * 1878 * The private event interface also issues events for the hotkeys. As 1879 * the driver gained features, the event handling code ended up being 1880 * built around the hotkey subdriver. This will need to be refactored 1881 * to a more formal event API eventually. 1882 * 1883 * Some "hotkeys" are actually supposed to be used as event reports, 1884 * such as "brightness has changed", "volume has changed", depending on 1885 * the ThinkPad model and how the firmware is operating. 1886 * 1887 * Unlike other classes, hotkey-class events have mask/unmask control on 1888 * non-ancient firmware. However, how it behaves changes a lot with the 1889 * firmware model and version. 1890 */ 1891 1892 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1893 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1894 TP_ACPI_HOTKEYSCAN_FNF2, 1895 TP_ACPI_HOTKEYSCAN_FNF3, 1896 TP_ACPI_HOTKEYSCAN_FNF4, 1897 TP_ACPI_HOTKEYSCAN_FNF5, 1898 TP_ACPI_HOTKEYSCAN_FNF6, 1899 TP_ACPI_HOTKEYSCAN_FNF7, 1900 TP_ACPI_HOTKEYSCAN_FNF8, 1901 TP_ACPI_HOTKEYSCAN_FNF9, 1902 TP_ACPI_HOTKEYSCAN_FNF10, 1903 TP_ACPI_HOTKEYSCAN_FNF11, 1904 TP_ACPI_HOTKEYSCAN_FNF12, 1905 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1906 TP_ACPI_HOTKEYSCAN_FNINSERT, 1907 TP_ACPI_HOTKEYSCAN_FNDELETE, 1908 TP_ACPI_HOTKEYSCAN_FNHOME, 1909 TP_ACPI_HOTKEYSCAN_FNEND, 1910 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1911 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1912 TP_ACPI_HOTKEYSCAN_FNSPACE, 1913 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1914 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1915 TP_ACPI_HOTKEYSCAN_MUTE, 1916 TP_ACPI_HOTKEYSCAN_THINKPAD, 1917 TP_ACPI_HOTKEYSCAN_UNK1, 1918 TP_ACPI_HOTKEYSCAN_UNK2, 1919 TP_ACPI_HOTKEYSCAN_UNK3, 1920 TP_ACPI_HOTKEYSCAN_UNK4, 1921 TP_ACPI_HOTKEYSCAN_UNK5, 1922 TP_ACPI_HOTKEYSCAN_UNK6, 1923 TP_ACPI_HOTKEYSCAN_UNK7, 1924 TP_ACPI_HOTKEYSCAN_UNK8, 1925 1926 TP_ACPI_HOTKEYSCAN_MUTE2, 1927 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1928 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1929 TP_ACPI_HOTKEYSCAN_CLOUD, 1930 TP_ACPI_HOTKEYSCAN_UNK9, 1931 TP_ACPI_HOTKEYSCAN_VOICE, 1932 TP_ACPI_HOTKEYSCAN_UNK10, 1933 TP_ACPI_HOTKEYSCAN_GESTURES, 1934 TP_ACPI_HOTKEYSCAN_UNK11, 1935 TP_ACPI_HOTKEYSCAN_UNK12, 1936 TP_ACPI_HOTKEYSCAN_UNK13, 1937 TP_ACPI_HOTKEYSCAN_CONFIG, 1938 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1939 TP_ACPI_HOTKEYSCAN_RELOAD, 1940 TP_ACPI_HOTKEYSCAN_BACK, 1941 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1942 TP_ACPI_HOTKEYSCAN_MIC_UP, 1943 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1944 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1945 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1946 1947 /* Hotkey keymap size */ 1948 TPACPI_HOTKEY_MAP_LEN 1949 }; 1950 1951 enum { /* Keys/events available through NVRAM polling */ 1952 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1953 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1954 }; 1955 1956 enum { /* Positions of some of the keys in hotkey masks */ 1957 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1958 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1959 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1960 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1961 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1962 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1963 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1964 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1965 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1966 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1967 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1968 }; 1969 1970 enum { /* NVRAM to ACPI HKEY group map */ 1971 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1972 TP_ACPI_HKEY_ZOOM_MASK | 1973 TP_ACPI_HKEY_DISPSWTCH_MASK | 1974 TP_ACPI_HKEY_HIBERNATE_MASK, 1975 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1976 TP_ACPI_HKEY_BRGHTDWN_MASK, 1977 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1978 TP_ACPI_HKEY_VOLDWN_MASK | 1979 TP_ACPI_HKEY_MUTE_MASK, 1980 }; 1981 1982 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1983 struct tp_nvram_state { 1984 u16 thinkpad_toggle:1; 1985 u16 zoom_toggle:1; 1986 u16 display_toggle:1; 1987 u16 thinklight_toggle:1; 1988 u16 hibernate_toggle:1; 1989 u16 displayexp_toggle:1; 1990 u16 display_state:1; 1991 u16 brightness_toggle:1; 1992 u16 volume_toggle:1; 1993 u16 mute:1; 1994 1995 u8 brightness_level; 1996 u8 volume_level; 1997 }; 1998 1999 /* kthread for the hotkey poller */ 2000 static struct task_struct *tpacpi_hotkey_task; 2001 2002 /* 2003 * Acquire mutex to write poller control variables as an 2004 * atomic block. 2005 * 2006 * Increment hotkey_config_change when changing them if you 2007 * want the kthread to forget old state. 2008 * 2009 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2010 */ 2011 static struct mutex hotkey_thread_data_mutex; 2012 static unsigned int hotkey_config_change; 2013 2014 /* 2015 * hotkey poller control variables 2016 * 2017 * Must be atomic or readers will also need to acquire mutex 2018 * 2019 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2020 * should be used only when the changes need to be taken as 2021 * a block, OR when one needs to force the kthread to forget 2022 * old state. 2023 */ 2024 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2025 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2026 2027 #define HOTKEY_CONFIG_CRITICAL_START \ 2028 do { \ 2029 mutex_lock(&hotkey_thread_data_mutex); \ 2030 hotkey_config_change++; \ 2031 } while (0); 2032 #define HOTKEY_CONFIG_CRITICAL_END \ 2033 mutex_unlock(&hotkey_thread_data_mutex); 2034 2035 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2036 2037 #define hotkey_source_mask 0U 2038 #define HOTKEY_CONFIG_CRITICAL_START 2039 #define HOTKEY_CONFIG_CRITICAL_END 2040 2041 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2042 2043 static struct mutex hotkey_mutex; 2044 2045 static enum { /* Reasons for waking up */ 2046 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2047 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2048 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2049 } hotkey_wakeup_reason; 2050 2051 static int hotkey_autosleep_ack; 2052 2053 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2054 static u32 hotkey_all_mask; /* all events supported in fw */ 2055 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */ 2056 static u32 hotkey_reserved_mask; /* events better left disabled */ 2057 static u32 hotkey_driver_mask; /* events needed by the driver */ 2058 static u32 hotkey_user_mask; /* events visible to userspace */ 2059 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2060 2061 static u16 *hotkey_keycode_map; 2062 2063 static struct attribute_set *hotkey_dev_attributes; 2064 2065 static void tpacpi_driver_event(const unsigned int hkey_event); 2066 static void hotkey_driver_event(const unsigned int scancode); 2067 static void hotkey_poll_setup(const bool may_warn); 2068 2069 /* HKEY.MHKG() return bits */ 2070 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2071 /* ThinkPad X1 Yoga (2016) */ 2072 #define TP_EC_CMMD_TABLET_MODE 0x6 2073 2074 static int hotkey_get_wlsw(void) 2075 { 2076 int status; 2077 2078 if (!tp_features.hotkey_wlsw) 2079 return -ENODEV; 2080 2081 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2082 if (dbg_wlswemul) 2083 return (tpacpi_wlsw_emulstate) ? 2084 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2085 #endif 2086 2087 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2088 return -EIO; 2089 2090 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2091 } 2092 2093 static int hotkey_get_tablet_mode(int *status) 2094 { 2095 int s; 2096 2097 switch (tp_features.hotkey_tablet) { 2098 case TP_HOTKEY_TABLET_USES_MHKG: 2099 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2100 return -EIO; 2101 2102 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2103 break; 2104 case TP_HOTKEY_TABLET_USES_CMMD: 2105 if (!acpi_evalf(ec_handle, &s, "CMMD", "d")) 2106 return -EIO; 2107 2108 *status = (s == TP_EC_CMMD_TABLET_MODE); 2109 break; 2110 default: 2111 break; 2112 } 2113 2114 return 0; 2115 } 2116 2117 /* 2118 * Reads current event mask from firmware, and updates 2119 * hotkey_acpi_mask accordingly. Also resets any bits 2120 * from hotkey_user_mask that are unavailable to be 2121 * delivered (shadow requirement of the userspace ABI). 2122 * 2123 * Call with hotkey_mutex held 2124 */ 2125 static int hotkey_mask_get(void) 2126 { 2127 if (tp_features.hotkey_mask) { 2128 u32 m = 0; 2129 2130 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2131 return -EIO; 2132 2133 hotkey_acpi_mask = m; 2134 } else { 2135 /* no mask support doesn't mean no event support... */ 2136 hotkey_acpi_mask = hotkey_all_mask; 2137 } 2138 2139 /* sync userspace-visible mask */ 2140 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2141 2142 return 0; 2143 } 2144 2145 static void hotkey_mask_warn_incomplete_mask(void) 2146 { 2147 /* log only what the user can fix... */ 2148 const u32 wantedmask = hotkey_driver_mask & 2149 ~(hotkey_acpi_mask | hotkey_source_mask) & 2150 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2151 2152 if (wantedmask) 2153 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2154 } 2155 2156 /* 2157 * Set the firmware mask when supported 2158 * 2159 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2160 * 2161 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2162 * 2163 * Call with hotkey_mutex held 2164 */ 2165 static int hotkey_mask_set(u32 mask) 2166 { 2167 int i; 2168 int rc = 0; 2169 2170 const u32 fwmask = mask & ~hotkey_source_mask; 2171 2172 if (tp_features.hotkey_mask) { 2173 for (i = 0; i < 32; i++) { 2174 if (!acpi_evalf(hkey_handle, 2175 NULL, "MHKM", "vdd", i + 1, 2176 !!(mask & (1 << i)))) { 2177 rc = -EIO; 2178 break; 2179 } 2180 } 2181 } 2182 2183 /* 2184 * We *must* make an inconditional call to hotkey_mask_get to 2185 * refresh hotkey_acpi_mask and update hotkey_user_mask 2186 * 2187 * Take the opportunity to also log when we cannot _enable_ 2188 * a given event. 2189 */ 2190 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2191 pr_notice("asked for hotkey mask 0x%08x, but " 2192 "firmware forced it to 0x%08x\n", 2193 fwmask, hotkey_acpi_mask); 2194 } 2195 2196 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2197 hotkey_mask_warn_incomplete_mask(); 2198 2199 return rc; 2200 } 2201 2202 /* 2203 * Sets hotkey_user_mask and tries to set the firmware mask 2204 * 2205 * Call with hotkey_mutex held 2206 */ 2207 static int hotkey_user_mask_set(const u32 mask) 2208 { 2209 int rc; 2210 2211 /* Give people a chance to notice they are doing something that 2212 * is bound to go boom on their users sooner or later */ 2213 if (!tp_warned.hotkey_mask_ff && 2214 (mask == 0xffff || mask == 0xffffff || 2215 mask == 0xffffffff)) { 2216 tp_warned.hotkey_mask_ff = 1; 2217 pr_notice("setting the hotkey mask to 0x%08x is likely " 2218 "not the best way to go about it\n", mask); 2219 pr_notice("please consider using the driver defaults, " 2220 "and refer to up-to-date thinkpad-acpi " 2221 "documentation\n"); 2222 } 2223 2224 /* Try to enable what the user asked for, plus whatever we need. 2225 * this syncs everything but won't enable bits in hotkey_user_mask */ 2226 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2227 2228 /* Enable the available bits in hotkey_user_mask */ 2229 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2230 2231 return rc; 2232 } 2233 2234 /* 2235 * Sets the driver hotkey mask. 2236 * 2237 * Can be called even if the hotkey subdriver is inactive 2238 */ 2239 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2240 { 2241 int rc; 2242 2243 /* Do the right thing if hotkey_init has not been called yet */ 2244 if (!tp_features.hotkey) { 2245 hotkey_driver_mask = mask; 2246 return 0; 2247 } 2248 2249 mutex_lock(&hotkey_mutex); 2250 2251 HOTKEY_CONFIG_CRITICAL_START 2252 hotkey_driver_mask = mask; 2253 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2254 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2255 #endif 2256 HOTKEY_CONFIG_CRITICAL_END 2257 2258 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2259 ~hotkey_source_mask); 2260 hotkey_poll_setup(true); 2261 2262 mutex_unlock(&hotkey_mutex); 2263 2264 return rc; 2265 } 2266 2267 static int hotkey_status_get(int *status) 2268 { 2269 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2270 return -EIO; 2271 2272 return 0; 2273 } 2274 2275 static int hotkey_status_set(bool enable) 2276 { 2277 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2278 return -EIO; 2279 2280 return 0; 2281 } 2282 2283 static void tpacpi_input_send_tabletsw(void) 2284 { 2285 int state; 2286 2287 if (tp_features.hotkey_tablet && 2288 !hotkey_get_tablet_mode(&state)) { 2289 mutex_lock(&tpacpi_inputdev_send_mutex); 2290 2291 input_report_switch(tpacpi_inputdev, 2292 SW_TABLET_MODE, !!state); 2293 input_sync(tpacpi_inputdev); 2294 2295 mutex_unlock(&tpacpi_inputdev_send_mutex); 2296 } 2297 } 2298 2299 /* Do NOT call without validating scancode first */ 2300 static void tpacpi_input_send_key(const unsigned int scancode) 2301 { 2302 const unsigned int keycode = hotkey_keycode_map[scancode]; 2303 2304 if (keycode != KEY_RESERVED) { 2305 mutex_lock(&tpacpi_inputdev_send_mutex); 2306 2307 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2308 input_report_key(tpacpi_inputdev, keycode, 1); 2309 input_sync(tpacpi_inputdev); 2310 2311 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2312 input_report_key(tpacpi_inputdev, keycode, 0); 2313 input_sync(tpacpi_inputdev); 2314 2315 mutex_unlock(&tpacpi_inputdev_send_mutex); 2316 } 2317 } 2318 2319 /* Do NOT call without validating scancode first */ 2320 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2321 { 2322 hotkey_driver_event(scancode); 2323 if (hotkey_user_mask & (1 << scancode)) 2324 tpacpi_input_send_key(scancode); 2325 } 2326 2327 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2328 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2329 2330 /* Do NOT call without validating scancode first */ 2331 static void tpacpi_hotkey_send_key(unsigned int scancode) 2332 { 2333 tpacpi_input_send_key_masked(scancode); 2334 } 2335 2336 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2337 { 2338 u8 d; 2339 2340 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2341 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2342 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2343 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2344 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2345 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2346 } 2347 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2348 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2349 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2350 } 2351 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2352 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2353 n->displayexp_toggle = 2354 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2355 } 2356 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2357 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2358 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2359 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2360 n->brightness_toggle = 2361 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2362 } 2363 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2364 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2365 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2366 >> TP_NVRAM_POS_LEVEL_VOLUME; 2367 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2368 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2369 } 2370 } 2371 2372 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2373 do { \ 2374 if ((event_mask & (1 << __scancode)) && \ 2375 oldn->__member != newn->__member) \ 2376 tpacpi_hotkey_send_key(__scancode); \ 2377 } while (0) 2378 2379 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2380 do { \ 2381 if (event_mask & (1 << __scancode)) \ 2382 tpacpi_hotkey_send_key(__scancode); \ 2383 } while (0) 2384 2385 static void issue_volchange(const unsigned int oldvol, 2386 const unsigned int newvol, 2387 const u32 event_mask) 2388 { 2389 unsigned int i = oldvol; 2390 2391 while (i > newvol) { 2392 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2393 i--; 2394 } 2395 while (i < newvol) { 2396 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2397 i++; 2398 } 2399 } 2400 2401 static void issue_brightnesschange(const unsigned int oldbrt, 2402 const unsigned int newbrt, 2403 const u32 event_mask) 2404 { 2405 unsigned int i = oldbrt; 2406 2407 while (i > newbrt) { 2408 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2409 i--; 2410 } 2411 while (i < newbrt) { 2412 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2413 i++; 2414 } 2415 } 2416 2417 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2418 struct tp_nvram_state *newn, 2419 const u32 event_mask) 2420 { 2421 2422 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2423 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2424 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2425 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2426 2427 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2428 2429 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2430 2431 /* 2432 * Handle volume 2433 * 2434 * This code is supposed to duplicate the IBM firmware behaviour: 2435 * - Pressing MUTE issues mute hotkey message, even when already mute 2436 * - Pressing Volume up/down issues volume up/down hotkey messages, 2437 * even when already at maximum or minimum volume 2438 * - The act of unmuting issues volume up/down notification, 2439 * depending which key was used to unmute 2440 * 2441 * We are constrained to what the NVRAM can tell us, which is not much 2442 * and certainly not enough if more than one volume hotkey was pressed 2443 * since the last poll cycle. 2444 * 2445 * Just to make our life interesting, some newer Lenovo ThinkPads have 2446 * bugs in the BIOS and may fail to update volume_toggle properly. 2447 */ 2448 if (newn->mute) { 2449 /* muted */ 2450 if (!oldn->mute || 2451 oldn->volume_toggle != newn->volume_toggle || 2452 oldn->volume_level != newn->volume_level) { 2453 /* recently muted, or repeated mute keypress, or 2454 * multiple presses ending in mute */ 2455 issue_volchange(oldn->volume_level, newn->volume_level, 2456 event_mask); 2457 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2458 } 2459 } else { 2460 /* unmute */ 2461 if (oldn->mute) { 2462 /* recently unmuted, issue 'unmute' keypress */ 2463 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2464 } 2465 if (oldn->volume_level != newn->volume_level) { 2466 issue_volchange(oldn->volume_level, newn->volume_level, 2467 event_mask); 2468 } else if (oldn->volume_toggle != newn->volume_toggle) { 2469 /* repeated vol up/down keypress at end of scale ? */ 2470 if (newn->volume_level == 0) 2471 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2472 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2473 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2474 } 2475 } 2476 2477 /* handle brightness */ 2478 if (oldn->brightness_level != newn->brightness_level) { 2479 issue_brightnesschange(oldn->brightness_level, 2480 newn->brightness_level, event_mask); 2481 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2482 /* repeated key presses that didn't change state */ 2483 if (newn->brightness_level == 0) 2484 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2485 else if (newn->brightness_level >= bright_maxlvl 2486 && !tp_features.bright_unkfw) 2487 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2488 } 2489 2490 #undef TPACPI_COMPARE_KEY 2491 #undef TPACPI_MAY_SEND_KEY 2492 } 2493 2494 /* 2495 * Polling driver 2496 * 2497 * We track all events in hotkey_source_mask all the time, since 2498 * most of them are edge-based. We only issue those requested by 2499 * hotkey_user_mask or hotkey_driver_mask, though. 2500 */ 2501 static int hotkey_kthread(void *data) 2502 { 2503 struct tp_nvram_state s[2]; 2504 u32 poll_mask, event_mask; 2505 unsigned int si, so; 2506 unsigned long t; 2507 unsigned int change_detector; 2508 unsigned int poll_freq; 2509 bool was_frozen; 2510 2511 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2512 goto exit; 2513 2514 set_freezable(); 2515 2516 so = 0; 2517 si = 1; 2518 t = 0; 2519 2520 /* Initial state for compares */ 2521 mutex_lock(&hotkey_thread_data_mutex); 2522 change_detector = hotkey_config_change; 2523 poll_mask = hotkey_source_mask; 2524 event_mask = hotkey_source_mask & 2525 (hotkey_driver_mask | hotkey_user_mask); 2526 poll_freq = hotkey_poll_freq; 2527 mutex_unlock(&hotkey_thread_data_mutex); 2528 hotkey_read_nvram(&s[so], poll_mask); 2529 2530 while (!kthread_should_stop()) { 2531 if (t == 0) { 2532 if (likely(poll_freq)) 2533 t = 1000/poll_freq; 2534 else 2535 t = 100; /* should never happen... */ 2536 } 2537 t = msleep_interruptible(t); 2538 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2539 break; 2540 2541 if (t > 0 && !was_frozen) 2542 continue; 2543 2544 mutex_lock(&hotkey_thread_data_mutex); 2545 if (was_frozen || hotkey_config_change != change_detector) { 2546 /* forget old state on thaw or config change */ 2547 si = so; 2548 t = 0; 2549 change_detector = hotkey_config_change; 2550 } 2551 poll_mask = hotkey_source_mask; 2552 event_mask = hotkey_source_mask & 2553 (hotkey_driver_mask | hotkey_user_mask); 2554 poll_freq = hotkey_poll_freq; 2555 mutex_unlock(&hotkey_thread_data_mutex); 2556 2557 if (likely(poll_mask)) { 2558 hotkey_read_nvram(&s[si], poll_mask); 2559 if (likely(si != so)) { 2560 hotkey_compare_and_issue_event(&s[so], &s[si], 2561 event_mask); 2562 } 2563 } 2564 2565 so = si; 2566 si ^= 1; 2567 } 2568 2569 exit: 2570 return 0; 2571 } 2572 2573 /* call with hotkey_mutex held */ 2574 static void hotkey_poll_stop_sync(void) 2575 { 2576 if (tpacpi_hotkey_task) { 2577 kthread_stop(tpacpi_hotkey_task); 2578 tpacpi_hotkey_task = NULL; 2579 } 2580 } 2581 2582 /* call with hotkey_mutex held */ 2583 static void hotkey_poll_setup(const bool may_warn) 2584 { 2585 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2586 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2587 2588 if (hotkey_poll_freq > 0 && 2589 (poll_driver_mask || 2590 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2591 if (!tpacpi_hotkey_task) { 2592 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2593 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2594 if (IS_ERR(tpacpi_hotkey_task)) { 2595 tpacpi_hotkey_task = NULL; 2596 pr_err("could not create kernel thread " 2597 "for hotkey polling\n"); 2598 } 2599 } 2600 } else { 2601 hotkey_poll_stop_sync(); 2602 if (may_warn && (poll_driver_mask || poll_user_mask) && 2603 hotkey_poll_freq == 0) { 2604 pr_notice("hot keys 0x%08x and/or events 0x%08x " 2605 "require polling, which is currently " 2606 "disabled\n", 2607 poll_user_mask, poll_driver_mask); 2608 } 2609 } 2610 } 2611 2612 static void hotkey_poll_setup_safe(const bool may_warn) 2613 { 2614 mutex_lock(&hotkey_mutex); 2615 hotkey_poll_setup(may_warn); 2616 mutex_unlock(&hotkey_mutex); 2617 } 2618 2619 /* call with hotkey_mutex held */ 2620 static void hotkey_poll_set_freq(unsigned int freq) 2621 { 2622 if (!freq) 2623 hotkey_poll_stop_sync(); 2624 2625 hotkey_poll_freq = freq; 2626 } 2627 2628 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2629 2630 static void hotkey_poll_setup(const bool __unused) 2631 { 2632 } 2633 2634 static void hotkey_poll_setup_safe(const bool __unused) 2635 { 2636 } 2637 2638 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2639 2640 static int hotkey_inputdev_open(struct input_dev *dev) 2641 { 2642 switch (tpacpi_lifecycle) { 2643 case TPACPI_LIFE_INIT: 2644 case TPACPI_LIFE_RUNNING: 2645 hotkey_poll_setup_safe(false); 2646 return 0; 2647 case TPACPI_LIFE_EXITING: 2648 return -EBUSY; 2649 } 2650 2651 /* Should only happen if tpacpi_lifecycle is corrupt */ 2652 BUG(); 2653 return -EBUSY; 2654 } 2655 2656 static void hotkey_inputdev_close(struct input_dev *dev) 2657 { 2658 /* disable hotkey polling when possible */ 2659 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2660 !(hotkey_source_mask & hotkey_driver_mask)) 2661 hotkey_poll_setup_safe(false); 2662 } 2663 2664 /* sysfs hotkey enable ------------------------------------------------- */ 2665 static ssize_t hotkey_enable_show(struct device *dev, 2666 struct device_attribute *attr, 2667 char *buf) 2668 { 2669 int res, status; 2670 2671 printk_deprecated_attribute("hotkey_enable", 2672 "Hotkey reporting is always enabled"); 2673 2674 res = hotkey_status_get(&status); 2675 if (res) 2676 return res; 2677 2678 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2679 } 2680 2681 static ssize_t hotkey_enable_store(struct device *dev, 2682 struct device_attribute *attr, 2683 const char *buf, size_t count) 2684 { 2685 unsigned long t; 2686 2687 printk_deprecated_attribute("hotkey_enable", 2688 "Hotkeys can be disabled through hotkey_mask"); 2689 2690 if (parse_strtoul(buf, 1, &t)) 2691 return -EINVAL; 2692 2693 if (t == 0) 2694 return -EPERM; 2695 2696 return count; 2697 } 2698 2699 static DEVICE_ATTR_RW(hotkey_enable); 2700 2701 /* sysfs hotkey mask --------------------------------------------------- */ 2702 static ssize_t hotkey_mask_show(struct device *dev, 2703 struct device_attribute *attr, 2704 char *buf) 2705 { 2706 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2707 } 2708 2709 static ssize_t hotkey_mask_store(struct device *dev, 2710 struct device_attribute *attr, 2711 const char *buf, size_t count) 2712 { 2713 unsigned long t; 2714 int res; 2715 2716 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2717 return -EINVAL; 2718 2719 if (mutex_lock_killable(&hotkey_mutex)) 2720 return -ERESTARTSYS; 2721 2722 res = hotkey_user_mask_set(t); 2723 2724 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2725 hotkey_poll_setup(true); 2726 #endif 2727 2728 mutex_unlock(&hotkey_mutex); 2729 2730 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2731 2732 return (res) ? res : count; 2733 } 2734 2735 static DEVICE_ATTR_RW(hotkey_mask); 2736 2737 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2738 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2739 struct device_attribute *attr, 2740 char *buf) 2741 { 2742 return sprintf(buf, "0\n"); 2743 } 2744 2745 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2746 2747 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2748 static ssize_t hotkey_bios_mask_show(struct device *dev, 2749 struct device_attribute *attr, 2750 char *buf) 2751 { 2752 printk_deprecated_attribute("hotkey_bios_mask", 2753 "This attribute is useless."); 2754 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2755 } 2756 2757 static DEVICE_ATTR_RO(hotkey_bios_mask); 2758 2759 /* sysfs hotkey all_mask ----------------------------------------------- */ 2760 static ssize_t hotkey_all_mask_show(struct device *dev, 2761 struct device_attribute *attr, 2762 char *buf) 2763 { 2764 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2765 hotkey_all_mask | hotkey_source_mask); 2766 } 2767 2768 static DEVICE_ATTR_RO(hotkey_all_mask); 2769 2770 /* sysfs hotkey all_mask ----------------------------------------------- */ 2771 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev, 2772 struct device_attribute *attr, 2773 char *buf) 2774 { 2775 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2776 hotkey_adaptive_all_mask | hotkey_source_mask); 2777 } 2778 2779 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask); 2780 2781 /* sysfs hotkey recommended_mask --------------------------------------- */ 2782 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2783 struct device_attribute *attr, 2784 char *buf) 2785 { 2786 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2787 (hotkey_all_mask | hotkey_source_mask) 2788 & ~hotkey_reserved_mask); 2789 } 2790 2791 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2792 2793 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2794 2795 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2796 static ssize_t hotkey_source_mask_show(struct device *dev, 2797 struct device_attribute *attr, 2798 char *buf) 2799 { 2800 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2801 } 2802 2803 static ssize_t hotkey_source_mask_store(struct device *dev, 2804 struct device_attribute *attr, 2805 const char *buf, size_t count) 2806 { 2807 unsigned long t; 2808 u32 r_ev; 2809 int rc; 2810 2811 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2812 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2813 return -EINVAL; 2814 2815 if (mutex_lock_killable(&hotkey_mutex)) 2816 return -ERESTARTSYS; 2817 2818 HOTKEY_CONFIG_CRITICAL_START 2819 hotkey_source_mask = t; 2820 HOTKEY_CONFIG_CRITICAL_END 2821 2822 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2823 ~hotkey_source_mask); 2824 hotkey_poll_setup(true); 2825 2826 /* check if events needed by the driver got disabled */ 2827 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2828 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2829 2830 mutex_unlock(&hotkey_mutex); 2831 2832 if (rc < 0) 2833 pr_err("hotkey_source_mask: " 2834 "failed to update the firmware event mask!\n"); 2835 2836 if (r_ev) 2837 pr_notice("hotkey_source_mask: " 2838 "some important events were disabled: 0x%04x\n", 2839 r_ev); 2840 2841 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2842 2843 return (rc < 0) ? rc : count; 2844 } 2845 2846 static DEVICE_ATTR_RW(hotkey_source_mask); 2847 2848 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2849 static ssize_t hotkey_poll_freq_show(struct device *dev, 2850 struct device_attribute *attr, 2851 char *buf) 2852 { 2853 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2854 } 2855 2856 static ssize_t hotkey_poll_freq_store(struct device *dev, 2857 struct device_attribute *attr, 2858 const char *buf, size_t count) 2859 { 2860 unsigned long t; 2861 2862 if (parse_strtoul(buf, 25, &t)) 2863 return -EINVAL; 2864 2865 if (mutex_lock_killable(&hotkey_mutex)) 2866 return -ERESTARTSYS; 2867 2868 hotkey_poll_set_freq(t); 2869 hotkey_poll_setup(true); 2870 2871 mutex_unlock(&hotkey_mutex); 2872 2873 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2874 2875 return count; 2876 } 2877 2878 static DEVICE_ATTR_RW(hotkey_poll_freq); 2879 2880 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2881 2882 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2883 static ssize_t hotkey_radio_sw_show(struct device *dev, 2884 struct device_attribute *attr, 2885 char *buf) 2886 { 2887 int res; 2888 res = hotkey_get_wlsw(); 2889 if (res < 0) 2890 return res; 2891 2892 /* Opportunistic update */ 2893 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2894 2895 return snprintf(buf, PAGE_SIZE, "%d\n", 2896 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2897 } 2898 2899 static DEVICE_ATTR_RO(hotkey_radio_sw); 2900 2901 static void hotkey_radio_sw_notify_change(void) 2902 { 2903 if (tp_features.hotkey_wlsw) 2904 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2905 "hotkey_radio_sw"); 2906 } 2907 2908 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2909 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2910 struct device_attribute *attr, 2911 char *buf) 2912 { 2913 int res, s; 2914 res = hotkey_get_tablet_mode(&s); 2915 if (res < 0) 2916 return res; 2917 2918 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2919 } 2920 2921 static DEVICE_ATTR_RO(hotkey_tablet_mode); 2922 2923 static void hotkey_tablet_mode_notify_change(void) 2924 { 2925 if (tp_features.hotkey_tablet) 2926 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2927 "hotkey_tablet_mode"); 2928 } 2929 2930 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2931 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2932 struct device_attribute *attr, 2933 char *buf) 2934 { 2935 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2936 } 2937 2938 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2939 2940 static void hotkey_wakeup_reason_notify_change(void) 2941 { 2942 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2943 "wakeup_reason"); 2944 } 2945 2946 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2947 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2948 struct device_attribute *attr, 2949 char *buf) 2950 { 2951 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2952 } 2953 2954 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 2955 hotkey_wakeup_hotunplug_complete_show, NULL); 2956 2957 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2958 { 2959 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2960 "wakeup_hotunplug_complete"); 2961 } 2962 2963 /* sysfs adaptive kbd mode --------------------------------------------- */ 2964 2965 static int adaptive_keyboard_get_mode(void); 2966 static int adaptive_keyboard_set_mode(int new_mode); 2967 2968 enum ADAPTIVE_KEY_MODE { 2969 HOME_MODE, 2970 WEB_BROWSER_MODE, 2971 WEB_CONFERENCE_MODE, 2972 FUNCTION_MODE, 2973 LAYFLAT_MODE 2974 }; 2975 2976 static ssize_t adaptive_kbd_mode_show(struct device *dev, 2977 struct device_attribute *attr, 2978 char *buf) 2979 { 2980 int current_mode; 2981 2982 current_mode = adaptive_keyboard_get_mode(); 2983 if (current_mode < 0) 2984 return current_mode; 2985 2986 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 2987 } 2988 2989 static ssize_t adaptive_kbd_mode_store(struct device *dev, 2990 struct device_attribute *attr, 2991 const char *buf, size_t count) 2992 { 2993 unsigned long t; 2994 int res; 2995 2996 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 2997 return -EINVAL; 2998 2999 res = adaptive_keyboard_set_mode(t); 3000 return (res < 0) ? res : count; 3001 } 3002 3003 static DEVICE_ATTR_RW(adaptive_kbd_mode); 3004 3005 static struct attribute *adaptive_kbd_attributes[] = { 3006 &dev_attr_adaptive_kbd_mode.attr, 3007 NULL 3008 }; 3009 3010 static const struct attribute_group adaptive_kbd_attr_group = { 3011 .attrs = adaptive_kbd_attributes, 3012 }; 3013 3014 /* --------------------------------------------------------------------- */ 3015 3016 static struct attribute *hotkey_attributes[] __initdata = { 3017 &dev_attr_hotkey_enable.attr, 3018 &dev_attr_hotkey_bios_enabled.attr, 3019 &dev_attr_hotkey_bios_mask.attr, 3020 &dev_attr_wakeup_reason.attr, 3021 &dev_attr_wakeup_hotunplug_complete.attr, 3022 &dev_attr_hotkey_mask.attr, 3023 &dev_attr_hotkey_all_mask.attr, 3024 &dev_attr_hotkey_adaptive_all_mask.attr, 3025 &dev_attr_hotkey_recommended_mask.attr, 3026 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3027 &dev_attr_hotkey_source_mask.attr, 3028 &dev_attr_hotkey_poll_freq.attr, 3029 #endif 3030 }; 3031 3032 /* 3033 * Sync both the hw and sw blocking state of all switches 3034 */ 3035 static void tpacpi_send_radiosw_update(void) 3036 { 3037 int wlsw; 3038 3039 /* 3040 * We must sync all rfkill controllers *before* issuing any 3041 * rfkill input events, or we will race the rfkill core input 3042 * handler. 3043 * 3044 * tpacpi_inputdev_send_mutex works as a synchronization point 3045 * for the above. 3046 * 3047 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3048 */ 3049 3050 wlsw = hotkey_get_wlsw(); 3051 3052 /* Sync hw blocking state first if it is hw-blocked */ 3053 if (wlsw == TPACPI_RFK_RADIO_OFF) 3054 tpacpi_rfk_update_hwblock_state(true); 3055 3056 /* Sync sw blocking state */ 3057 tpacpi_rfk_update_swstate_all(); 3058 3059 /* Sync hw blocking state last if it is hw-unblocked */ 3060 if (wlsw == TPACPI_RFK_RADIO_ON) 3061 tpacpi_rfk_update_hwblock_state(false); 3062 3063 /* Issue rfkill input event for WLSW switch */ 3064 if (!(wlsw < 0)) { 3065 mutex_lock(&tpacpi_inputdev_send_mutex); 3066 3067 input_report_switch(tpacpi_inputdev, 3068 SW_RFKILL_ALL, (wlsw > 0)); 3069 input_sync(tpacpi_inputdev); 3070 3071 mutex_unlock(&tpacpi_inputdev_send_mutex); 3072 } 3073 3074 /* 3075 * this can be unconditional, as we will poll state again 3076 * if userspace uses the notify to read data 3077 */ 3078 hotkey_radio_sw_notify_change(); 3079 } 3080 3081 static void hotkey_exit(void) 3082 { 3083 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3084 mutex_lock(&hotkey_mutex); 3085 hotkey_poll_stop_sync(); 3086 mutex_unlock(&hotkey_mutex); 3087 #endif 3088 3089 if (hotkey_dev_attributes) 3090 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3091 3092 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3093 "restoring original HKEY status and mask\n"); 3094 /* yes, there is a bitwise or below, we want the 3095 * functions to be called even if one of them fail */ 3096 if (((tp_features.hotkey_mask && 3097 hotkey_mask_set(hotkey_orig_mask)) | 3098 hotkey_status_set(false)) != 0) 3099 pr_err("failed to restore hot key mask " 3100 "to BIOS defaults\n"); 3101 } 3102 3103 static void __init hotkey_unmap(const unsigned int scancode) 3104 { 3105 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3106 clear_bit(hotkey_keycode_map[scancode], 3107 tpacpi_inputdev->keybit); 3108 hotkey_keycode_map[scancode] = KEY_RESERVED; 3109 } 3110 } 3111 3112 /* 3113 * HKEY quirks: 3114 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3115 */ 3116 3117 #define TPACPI_HK_Q_INIMASK 0x0001 3118 3119 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3120 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3121 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3122 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3123 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3124 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3125 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3126 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3127 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3128 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3129 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3130 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3131 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3132 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3133 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3134 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3135 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3136 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3137 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3138 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3139 }; 3140 3141 typedef u16 tpacpi_keymap_entry_t; 3142 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3143 3144 static int hotkey_init_tablet_mode(void) 3145 { 3146 int in_tablet_mode = 0, res; 3147 char *type = NULL; 3148 3149 if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { 3150 /* For X41t, X60t, X61t Tablets... */ 3151 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; 3152 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); 3153 type = "MHKG"; 3154 } else if (acpi_evalf(ec_handle, &res, "CMMD", "qd")) { 3155 /* For X1 Yoga (2016) */ 3156 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_CMMD; 3157 in_tablet_mode = res == TP_EC_CMMD_TABLET_MODE; 3158 type = "CMMD"; 3159 } 3160 3161 if (!tp_features.hotkey_tablet) 3162 return 0; 3163 3164 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", 3165 type, in_tablet_mode ? "tablet" : "laptop"); 3166 3167 res = add_to_attr_set(hotkey_dev_attributes, 3168 &dev_attr_hotkey_tablet_mode.attr); 3169 if (res) 3170 return -1; 3171 3172 return in_tablet_mode; 3173 } 3174 3175 static int __init hotkey_init(struct ibm_init_struct *iibm) 3176 { 3177 /* Requirements for changing the default keymaps: 3178 * 3179 * 1. Many of the keys are mapped to KEY_RESERVED for very 3180 * good reasons. Do not change them unless you have deep 3181 * knowledge on the IBM and Lenovo ThinkPad firmware for 3182 * the various ThinkPad models. The driver behaves 3183 * differently for KEY_RESERVED: such keys have their 3184 * hot key mask *unset* in mask_recommended, and also 3185 * in the initial hot key mask programmed into the 3186 * firmware at driver load time, which means the firm- 3187 * ware may react very differently if you change them to 3188 * something else; 3189 * 3190 * 2. You must be subscribed to the linux-thinkpad and 3191 * ibm-acpi-devel mailing lists, and you should read the 3192 * list archives since 2007 if you want to change the 3193 * keymaps. This requirement exists so that you will 3194 * know the past history of problems with the thinkpad- 3195 * acpi driver keymaps, and also that you will be 3196 * listening to any bug reports; 3197 * 3198 * 3. Do not send thinkpad-acpi specific patches directly to 3199 * for merging, *ever*. Send them to the linux-acpi 3200 * mailinglist for comments. Merging is to be done only 3201 * through acpi-test and the ACPI maintainer. 3202 * 3203 * If the above is too much to ask, don't change the keymap. 3204 * Ask the thinkpad-acpi maintainer to do it, instead. 3205 */ 3206 3207 enum keymap_index { 3208 TPACPI_KEYMAP_IBM_GENERIC = 0, 3209 TPACPI_KEYMAP_LENOVO_GENERIC, 3210 }; 3211 3212 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3213 /* Generic keymap for IBM ThinkPads */ 3214 [TPACPI_KEYMAP_IBM_GENERIC] = { 3215 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3216 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3217 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3218 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3219 3220 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3221 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3222 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3223 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3224 3225 /* brightness: firmware always reacts to them */ 3226 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3227 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3228 3229 /* Thinklight: firmware always react to it */ 3230 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3231 3232 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3233 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3234 3235 /* Volume: firmware always react to it and reprograms 3236 * the built-in *extra* mixer. Never map it to control 3237 * another mixer by default. */ 3238 KEY_RESERVED, /* 0x14: VOLUME UP */ 3239 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3240 KEY_RESERVED, /* 0x16: MUTE */ 3241 3242 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3243 3244 /* (assignments unknown, please report if found) */ 3245 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3246 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3247 3248 /* No assignments, only used for Adaptive keyboards. */ 3249 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3250 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3251 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3252 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3253 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3254 }, 3255 3256 /* Generic keymap for Lenovo ThinkPads */ 3257 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3258 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3259 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3260 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3261 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3262 3263 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3264 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3265 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3266 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3267 3268 /* These should be enabled --only-- when ACPI video 3269 * is disabled (i.e. in "vendor" mode), and are handled 3270 * in a special way by the init code */ 3271 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3272 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3273 3274 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3275 3276 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3277 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3278 3279 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3280 * react to it and reprograms the built-in *extra* mixer. 3281 * Never map it to control another mixer by default. 3282 * 3283 * T60?, T61, R60?, R61: firmware and EC tries to send 3284 * these over the regular keyboard, so these are no-ops, 3285 * but there are still weird bugs re. MUTE, so do not 3286 * change unless you get test reports from all Lenovo 3287 * models. May cause the BIOS to interfere with the 3288 * HDA mixer. 3289 */ 3290 KEY_RESERVED, /* 0x14: VOLUME UP */ 3291 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3292 KEY_RESERVED, /* 0x16: MUTE */ 3293 3294 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3295 3296 /* (assignments unknown, please report if found) */ 3297 KEY_UNKNOWN, KEY_UNKNOWN, 3298 3299 /* 3300 * The mic mute button only sends 0x1a. It does not 3301 * automatically mute the mic or change the mute light. 3302 */ 3303 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3304 3305 /* (assignments unknown, please report if found) */ 3306 KEY_UNKNOWN, 3307 3308 /* Extra keys in use since the X240 / T440 / T540 */ 3309 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3310 3311 /* 3312 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3313 * The first item in this list is the Mute button which is 3314 * emitted with 0x103 through 3315 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3316 * symbol is held. 3317 * We'll need to offset those by 0x20. 3318 */ 3319 KEY_RESERVED, /* Mute held, 0x103 */ 3320 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3321 KEY_RESERVED, /* Clipping tool */ 3322 KEY_RESERVED, /* Cloud */ 3323 KEY_RESERVED, 3324 KEY_VOICECOMMAND, /* Voice */ 3325 KEY_RESERVED, 3326 KEY_RESERVED, /* Gestures */ 3327 KEY_RESERVED, 3328 KEY_RESERVED, 3329 KEY_RESERVED, 3330 KEY_CONFIG, /* Settings */ 3331 KEY_RESERVED, /* New tab */ 3332 KEY_REFRESH, /* Reload */ 3333 KEY_BACK, /* Back */ 3334 KEY_RESERVED, /* Microphone down */ 3335 KEY_RESERVED, /* Microphone up */ 3336 KEY_RESERVED, /* Microphone cancellation */ 3337 KEY_RESERVED, /* Camera mode */ 3338 KEY_RESERVED, /* Rotate display, 0x116 */ 3339 }, 3340 }; 3341 3342 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3343 /* Generic maps (fallback) */ 3344 { 3345 .vendor = PCI_VENDOR_ID_IBM, 3346 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3347 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3348 }, 3349 { 3350 .vendor = PCI_VENDOR_ID_LENOVO, 3351 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3352 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3353 }, 3354 }; 3355 3356 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3357 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3358 3359 int res, i; 3360 int status; 3361 int hkeyv; 3362 bool radiosw_state = false; 3363 bool tabletsw_state = false; 3364 3365 unsigned long quirks; 3366 unsigned long keymap_id; 3367 3368 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3369 "initializing hotkey subdriver\n"); 3370 3371 BUG_ON(!tpacpi_inputdev); 3372 BUG_ON(tpacpi_inputdev->open != NULL || 3373 tpacpi_inputdev->close != NULL); 3374 3375 TPACPI_ACPIHANDLE_INIT(hkey); 3376 mutex_init(&hotkey_mutex); 3377 3378 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3379 mutex_init(&hotkey_thread_data_mutex); 3380 #endif 3381 3382 /* hotkey not supported on 570 */ 3383 tp_features.hotkey = hkey_handle != NULL; 3384 3385 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3386 "hotkeys are %s\n", 3387 str_supported(tp_features.hotkey)); 3388 3389 if (!tp_features.hotkey) 3390 return 1; 3391 3392 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3393 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3394 3395 tpacpi_disable_brightness_delay(); 3396 3397 /* MUST have enough space for all attributes to be added to 3398 * hotkey_dev_attributes */ 3399 hotkey_dev_attributes = create_attr_set( 3400 ARRAY_SIZE(hotkey_attributes) + 2, 3401 NULL); 3402 if (!hotkey_dev_attributes) 3403 return -ENOMEM; 3404 res = add_many_to_attr_set(hotkey_dev_attributes, 3405 hotkey_attributes, 3406 ARRAY_SIZE(hotkey_attributes)); 3407 if (res) 3408 goto err_exit; 3409 3410 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3411 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3412 for HKEY interface version 0x100 */ 3413 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3414 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3415 "firmware HKEY interface version: 0x%x\n", 3416 hkeyv); 3417 3418 switch (hkeyv >> 8) { 3419 case 1: 3420 /* 3421 * MHKV 0x100 in A31, R40, R40e, 3422 * T4x, X31, and later 3423 */ 3424 3425 /* Paranoia check AND init hotkey_all_mask */ 3426 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3427 "MHKA", "qd")) { 3428 pr_err("missing MHKA handler, please report this to %s\n", 3429 TPACPI_MAIL); 3430 /* Fallback: pre-init for FN+F3,F4,F12 */ 3431 hotkey_all_mask = 0x080cU; 3432 } else { 3433 tp_features.hotkey_mask = 1; 3434 } 3435 break; 3436 3437 case 2: 3438 /* 3439 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3440 */ 3441 3442 /* Paranoia check AND init hotkey_all_mask */ 3443 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3444 "MHKA", "dd", 1)) { 3445 pr_err("missing MHKA handler, please report this to %s\n", 3446 TPACPI_MAIL); 3447 /* Fallback: pre-init for FN+F3,F4,F12 */ 3448 hotkey_all_mask = 0x080cU; 3449 } else { 3450 tp_features.hotkey_mask = 1; 3451 } 3452 3453 /* 3454 * Check if we have an adaptive keyboard, like on the 3455 * Lenovo Carbon X1 2014 (2nd Gen). 3456 */ 3457 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3458 "MHKA", "dd", 2)) { 3459 if (hotkey_adaptive_all_mask != 0) { 3460 tp_features.has_adaptive_kbd = true; 3461 res = sysfs_create_group( 3462 &tpacpi_pdev->dev.kobj, 3463 &adaptive_kbd_attr_group); 3464 if (res) 3465 goto err_exit; 3466 } 3467 } else { 3468 tp_features.has_adaptive_kbd = false; 3469 hotkey_adaptive_all_mask = 0x0U; 3470 } 3471 break; 3472 3473 default: 3474 pr_err("unknown version of the HKEY interface: 0x%x\n", 3475 hkeyv); 3476 pr_err("please report this to %s\n", TPACPI_MAIL); 3477 break; 3478 } 3479 } 3480 3481 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3482 "hotkey masks are %s\n", 3483 str_supported(tp_features.hotkey_mask)); 3484 3485 /* Init hotkey_all_mask if not initialized yet */ 3486 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3487 (quirks & TPACPI_HK_Q_INIMASK)) 3488 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3489 3490 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3491 if (tp_features.hotkey_mask) { 3492 /* hotkey_source_mask *must* be zero for 3493 * the first hotkey_mask_get to return hotkey_orig_mask */ 3494 res = hotkey_mask_get(); 3495 if (res) 3496 goto err_exit; 3497 3498 hotkey_orig_mask = hotkey_acpi_mask; 3499 } else { 3500 hotkey_orig_mask = hotkey_all_mask; 3501 hotkey_acpi_mask = hotkey_all_mask; 3502 } 3503 3504 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3505 if (dbg_wlswemul) { 3506 tp_features.hotkey_wlsw = 1; 3507 radiosw_state = !!tpacpi_wlsw_emulstate; 3508 pr_info("radio switch emulation enabled\n"); 3509 } else 3510 #endif 3511 /* Not all thinkpads have a hardware radio switch */ 3512 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3513 tp_features.hotkey_wlsw = 1; 3514 radiosw_state = !!status; 3515 pr_info("radio switch found; radios are %s\n", 3516 enabled(status, 0)); 3517 } 3518 if (tp_features.hotkey_wlsw) 3519 res = add_to_attr_set(hotkey_dev_attributes, 3520 &dev_attr_hotkey_radio_sw.attr); 3521 3522 res = hotkey_init_tablet_mode(); 3523 if (res < 0) 3524 goto err_exit; 3525 3526 tabletsw_state = res; 3527 3528 res = register_attr_set_with_sysfs(hotkey_dev_attributes, 3529 &tpacpi_pdev->dev.kobj); 3530 if (res) 3531 goto err_exit; 3532 3533 /* Set up key map */ 3534 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3535 GFP_KERNEL); 3536 if (!hotkey_keycode_map) { 3537 pr_err("failed to allocate memory for key map\n"); 3538 res = -ENOMEM; 3539 goto err_exit; 3540 } 3541 3542 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3543 ARRAY_SIZE(tpacpi_keymap_qtable)); 3544 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3545 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3546 "using keymap number %lu\n", keymap_id); 3547 3548 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3549 TPACPI_HOTKEY_MAP_SIZE); 3550 3551 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3552 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3553 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3554 tpacpi_inputdev->keycode = hotkey_keycode_map; 3555 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3556 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3557 input_set_capability(tpacpi_inputdev, EV_KEY, 3558 hotkey_keycode_map[i]); 3559 } else { 3560 if (i < sizeof(hotkey_reserved_mask)*8) 3561 hotkey_reserved_mask |= 1 << i; 3562 } 3563 } 3564 3565 if (tp_features.hotkey_wlsw) { 3566 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3567 input_report_switch(tpacpi_inputdev, 3568 SW_RFKILL_ALL, radiosw_state); 3569 } 3570 if (tp_features.hotkey_tablet) { 3571 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3572 input_report_switch(tpacpi_inputdev, 3573 SW_TABLET_MODE, tabletsw_state); 3574 } 3575 3576 /* Do not issue duplicate brightness change events to 3577 * userspace. tpacpi_detect_brightness_capabilities() must have 3578 * been called before this point */ 3579 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3580 pr_info("This ThinkPad has standard ACPI backlight " 3581 "brightness control, supported by the ACPI " 3582 "video driver\n"); 3583 pr_notice("Disabling thinkpad-acpi brightness events " 3584 "by default...\n"); 3585 3586 /* Disable brightness up/down on Lenovo thinkpads when 3587 * ACPI is handling them, otherwise it is plain impossible 3588 * for userspace to do something even remotely sane */ 3589 hotkey_reserved_mask |= 3590 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3591 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3592 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3593 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3594 } 3595 3596 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3597 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3598 & ~hotkey_all_mask 3599 & ~hotkey_reserved_mask; 3600 3601 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3602 "hotkey source mask 0x%08x, polling freq %u\n", 3603 hotkey_source_mask, hotkey_poll_freq); 3604 #endif 3605 3606 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3607 "enabling firmware HKEY event interface...\n"); 3608 res = hotkey_status_set(true); 3609 if (res) { 3610 hotkey_exit(); 3611 return res; 3612 } 3613 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3614 | hotkey_driver_mask) 3615 & ~hotkey_source_mask); 3616 if (res < 0 && res != -ENXIO) { 3617 hotkey_exit(); 3618 return res; 3619 } 3620 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3621 & ~hotkey_reserved_mask; 3622 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3623 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3624 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3625 3626 tpacpi_inputdev->open = &hotkey_inputdev_open; 3627 tpacpi_inputdev->close = &hotkey_inputdev_close; 3628 3629 hotkey_poll_setup_safe(true); 3630 3631 return 0; 3632 3633 err_exit: 3634 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3635 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3636 &adaptive_kbd_attr_group); 3637 3638 hotkey_dev_attributes = NULL; 3639 3640 return (res < 0) ? res : 1; 3641 } 3642 3643 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3644 * mode, Web conference mode, Function mode and Lay-flat mode. 3645 * We support Home mode and Function mode currently. 3646 * 3647 * Will consider support rest of modes in future. 3648 * 3649 */ 3650 static const int adaptive_keyboard_modes[] = { 3651 HOME_MODE, 3652 /* WEB_BROWSER_MODE = 2, 3653 WEB_CONFERENCE_MODE = 3, */ 3654 FUNCTION_MODE 3655 }; 3656 3657 #define DFR_CHANGE_ROW 0x101 3658 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3659 #define FIRST_ADAPTIVE_KEY 0x103 3660 #define ADAPTIVE_KEY_OFFSET 0x020 3661 3662 /* press Fn key a while second, it will switch to Function Mode. Then 3663 * release Fn key, previous mode be restored. 3664 */ 3665 static bool adaptive_keyboard_mode_is_saved; 3666 static int adaptive_keyboard_prev_mode; 3667 3668 static int adaptive_keyboard_get_mode(void) 3669 { 3670 int mode = 0; 3671 3672 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3673 pr_err("Cannot read adaptive keyboard mode\n"); 3674 return -EIO; 3675 } 3676 3677 return mode; 3678 } 3679 3680 static int adaptive_keyboard_set_mode(int new_mode) 3681 { 3682 if (new_mode < 0 || 3683 new_mode > LAYFLAT_MODE) 3684 return -EINVAL; 3685 3686 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3687 pr_err("Cannot set adaptive keyboard mode\n"); 3688 return -EIO; 3689 } 3690 3691 return 0; 3692 } 3693 3694 static int adaptive_keyboard_get_next_mode(int mode) 3695 { 3696 size_t i; 3697 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3698 3699 for (i = 0; i <= max_mode; i++) { 3700 if (adaptive_keyboard_modes[i] == mode) 3701 break; 3702 } 3703 3704 if (i >= max_mode) 3705 i = 0; 3706 else 3707 i++; 3708 3709 return adaptive_keyboard_modes[i]; 3710 } 3711 3712 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3713 { 3714 int current_mode = 0; 3715 int new_mode = 0; 3716 int keycode; 3717 3718 switch (scancode) { 3719 case DFR_CHANGE_ROW: 3720 if (adaptive_keyboard_mode_is_saved) { 3721 new_mode = adaptive_keyboard_prev_mode; 3722 adaptive_keyboard_mode_is_saved = false; 3723 } else { 3724 current_mode = adaptive_keyboard_get_mode(); 3725 if (current_mode < 0) 3726 return false; 3727 new_mode = adaptive_keyboard_get_next_mode( 3728 current_mode); 3729 } 3730 3731 if (adaptive_keyboard_set_mode(new_mode) < 0) 3732 return false; 3733 3734 return true; 3735 3736 case DFR_SHOW_QUICKVIEW_ROW: 3737 current_mode = adaptive_keyboard_get_mode(); 3738 if (current_mode < 0) 3739 return false; 3740 3741 adaptive_keyboard_prev_mode = current_mode; 3742 adaptive_keyboard_mode_is_saved = true; 3743 3744 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3745 return false; 3746 return true; 3747 3748 default: 3749 if (scancode < FIRST_ADAPTIVE_KEY || 3750 scancode >= FIRST_ADAPTIVE_KEY + TPACPI_HOTKEY_MAP_LEN - 3751 ADAPTIVE_KEY_OFFSET) { 3752 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3753 scancode); 3754 return false; 3755 } 3756 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + ADAPTIVE_KEY_OFFSET]; 3757 if (keycode != KEY_RESERVED) { 3758 mutex_lock(&tpacpi_inputdev_send_mutex); 3759 3760 input_report_key(tpacpi_inputdev, keycode, 1); 3761 input_sync(tpacpi_inputdev); 3762 3763 input_report_key(tpacpi_inputdev, keycode, 0); 3764 input_sync(tpacpi_inputdev); 3765 3766 mutex_unlock(&tpacpi_inputdev_send_mutex); 3767 } 3768 return true; 3769 } 3770 } 3771 3772 static bool hotkey_notify_hotkey(const u32 hkey, 3773 bool *send_acpi_ev, 3774 bool *ignore_acpi_ev) 3775 { 3776 /* 0x1000-0x1FFF: key presses */ 3777 unsigned int scancode = hkey & 0xfff; 3778 *send_acpi_ev = true; 3779 *ignore_acpi_ev = false; 3780 3781 /* HKEY event 0x1001 is scancode 0x00 */ 3782 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3783 scancode--; 3784 if (!(hotkey_source_mask & (1 << scancode))) { 3785 tpacpi_input_send_key_masked(scancode); 3786 *send_acpi_ev = false; 3787 } else { 3788 *ignore_acpi_ev = true; 3789 } 3790 return true; 3791 } else { 3792 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3793 } 3794 return false; 3795 } 3796 3797 static bool hotkey_notify_wakeup(const u32 hkey, 3798 bool *send_acpi_ev, 3799 bool *ignore_acpi_ev) 3800 { 3801 /* 0x2000-0x2FFF: Wakeup reason */ 3802 *send_acpi_ev = true; 3803 *ignore_acpi_ev = false; 3804 3805 switch (hkey) { 3806 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3807 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3808 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3809 *ignore_acpi_ev = true; 3810 break; 3811 3812 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3813 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3814 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3815 *ignore_acpi_ev = true; 3816 break; 3817 3818 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3819 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3820 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3821 /* how to auto-heal: */ 3822 /* 2313: woke up from S3, go to S4/S5 */ 3823 /* 2413: woke up from S4, go to S5 */ 3824 break; 3825 3826 default: 3827 return false; 3828 } 3829 3830 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3831 pr_info("woke up due to a hot-unplug request...\n"); 3832 hotkey_wakeup_reason_notify_change(); 3833 } 3834 return true; 3835 } 3836 3837 static bool hotkey_notify_dockevent(const u32 hkey, 3838 bool *send_acpi_ev, 3839 bool *ignore_acpi_ev) 3840 { 3841 /* 0x4000-0x4FFF: dock-related events */ 3842 *send_acpi_ev = true; 3843 *ignore_acpi_ev = false; 3844 3845 switch (hkey) { 3846 case TP_HKEY_EV_UNDOCK_ACK: 3847 /* ACPI undock operation completed after wakeup */ 3848 hotkey_autosleep_ack = 1; 3849 pr_info("undocked\n"); 3850 hotkey_wakeup_hotunplug_complete_notify_change(); 3851 return true; 3852 3853 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3854 pr_info("docked into hotplug port replicator\n"); 3855 return true; 3856 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3857 pr_info("undocked from hotplug port replicator\n"); 3858 return true; 3859 3860 default: 3861 return false; 3862 } 3863 } 3864 3865 static bool hotkey_notify_usrevent(const u32 hkey, 3866 bool *send_acpi_ev, 3867 bool *ignore_acpi_ev) 3868 { 3869 /* 0x5000-0x5FFF: human interface helpers */ 3870 *send_acpi_ev = true; 3871 *ignore_acpi_ev = false; 3872 3873 switch (hkey) { 3874 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3875 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3876 return true; 3877 3878 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3879 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3880 tpacpi_input_send_tabletsw(); 3881 hotkey_tablet_mode_notify_change(); 3882 *send_acpi_ev = false; 3883 return true; 3884 3885 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3886 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3887 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3888 /* do not propagate these events */ 3889 *ignore_acpi_ev = true; 3890 return true; 3891 3892 default: 3893 return false; 3894 } 3895 } 3896 3897 static void thermal_dump_all_sensors(void); 3898 3899 static bool hotkey_notify_6xxx(const u32 hkey, 3900 bool *send_acpi_ev, 3901 bool *ignore_acpi_ev) 3902 { 3903 bool known = true; 3904 3905 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 3906 *send_acpi_ev = true; 3907 *ignore_acpi_ev = false; 3908 3909 switch (hkey) { 3910 case TP_HKEY_EV_THM_TABLE_CHANGED: 3911 pr_info("EC reports that Thermal Table has changed\n"); 3912 /* recommended action: do nothing, we don't have 3913 * Lenovo ATM information */ 3914 return true; 3915 case TP_HKEY_EV_ALARM_BAT_HOT: 3916 pr_crit("THERMAL ALARM: battery is too hot!\n"); 3917 /* recommended action: warn user through gui */ 3918 break; 3919 case TP_HKEY_EV_ALARM_BAT_XHOT: 3920 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 3921 /* recommended action: immediate sleep/hibernate */ 3922 break; 3923 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3924 pr_crit("THERMAL ALARM: " 3925 "a sensor reports something is too hot!\n"); 3926 /* recommended action: warn user through gui, that */ 3927 /* some internal component is too hot */ 3928 break; 3929 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3930 pr_alert("THERMAL EMERGENCY: " 3931 "a sensor reports something is extremely hot!\n"); 3932 /* recommended action: immediate sleep/hibernate */ 3933 break; 3934 case TP_HKEY_EV_AC_CHANGED: 3935 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 3936 * AC status changed; can be triggered by plugging or 3937 * unplugging AC adapter, docking or undocking. */ 3938 3939 /* fallthrough */ 3940 3941 case TP_HKEY_EV_KEY_NUMLOCK: 3942 case TP_HKEY_EV_KEY_FN: 3943 case TP_HKEY_EV_KEY_FN_ESC: 3944 /* key press events, we just ignore them as long as the EC 3945 * is still reporting them in the normal keyboard stream */ 3946 *send_acpi_ev = false; 3947 *ignore_acpi_ev = true; 3948 return true; 3949 3950 case TP_HKEY_EV_TABLET_CHANGED: 3951 tpacpi_input_send_tabletsw(); 3952 hotkey_tablet_mode_notify_change(); 3953 *send_acpi_ev = false; 3954 break; 3955 3956 default: 3957 pr_warn("unknown possible thermal alarm or keyboard event received\n"); 3958 known = false; 3959 } 3960 3961 thermal_dump_all_sensors(); 3962 3963 return known; 3964 } 3965 3966 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3967 { 3968 u32 hkey; 3969 bool send_acpi_ev; 3970 bool ignore_acpi_ev; 3971 bool known_ev; 3972 3973 if (event != 0x80) { 3974 pr_err("unknown HKEY notification event %d\n", event); 3975 /* forward it to userspace, maybe it knows how to handle it */ 3976 acpi_bus_generate_netlink_event( 3977 ibm->acpi->device->pnp.device_class, 3978 dev_name(&ibm->acpi->device->dev), 3979 event, 0); 3980 return; 3981 } 3982 3983 while (1) { 3984 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3985 pr_err("failed to retrieve HKEY event\n"); 3986 return; 3987 } 3988 3989 if (hkey == 0) { 3990 /* queue empty */ 3991 return; 3992 } 3993 3994 send_acpi_ev = true; 3995 ignore_acpi_ev = false; 3996 3997 switch (hkey >> 12) { 3998 case 1: 3999 /* 0x1000-0x1FFF: key presses */ 4000 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 4001 &ignore_acpi_ev); 4002 break; 4003 case 2: 4004 /* 0x2000-0x2FFF: Wakeup reason */ 4005 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 4006 &ignore_acpi_ev); 4007 break; 4008 case 3: 4009 /* 0x3000-0x3FFF: bay-related wakeups */ 4010 switch (hkey) { 4011 case TP_HKEY_EV_BAYEJ_ACK: 4012 hotkey_autosleep_ack = 1; 4013 pr_info("bay ejected\n"); 4014 hotkey_wakeup_hotunplug_complete_notify_change(); 4015 known_ev = true; 4016 break; 4017 case TP_HKEY_EV_OPTDRV_EJ: 4018 /* FIXME: kick libata if SATA link offline */ 4019 known_ev = true; 4020 break; 4021 default: 4022 known_ev = false; 4023 } 4024 break; 4025 case 4: 4026 /* 0x4000-0x4FFF: dock-related events */ 4027 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 4028 &ignore_acpi_ev); 4029 break; 4030 case 5: 4031 /* 0x5000-0x5FFF: human interface helpers */ 4032 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 4033 &ignore_acpi_ev); 4034 break; 4035 case 6: 4036 /* 0x6000-0x6FFF: thermal alarms/notices and 4037 * keyboard events */ 4038 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 4039 &ignore_acpi_ev); 4040 break; 4041 case 7: 4042 /* 0x7000-0x7FFF: misc */ 4043 if (tp_features.hotkey_wlsw && 4044 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 4045 tpacpi_send_radiosw_update(); 4046 send_acpi_ev = 0; 4047 known_ev = true; 4048 break; 4049 } 4050 /* fallthrough to default */ 4051 default: 4052 known_ev = false; 4053 } 4054 if (!known_ev) { 4055 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4056 pr_notice("please report the conditions when this " 4057 "event happened to %s\n", TPACPI_MAIL); 4058 } 4059 4060 /* netlink events */ 4061 if (!ignore_acpi_ev && send_acpi_ev) { 4062 acpi_bus_generate_netlink_event( 4063 ibm->acpi->device->pnp.device_class, 4064 dev_name(&ibm->acpi->device->dev), 4065 event, hkey); 4066 } 4067 } 4068 } 4069 4070 static void hotkey_suspend(void) 4071 { 4072 /* Do these on suspend, we get the events on early resume! */ 4073 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4074 hotkey_autosleep_ack = 0; 4075 4076 /* save previous mode of adaptive keyboard of X1 Carbon */ 4077 if (tp_features.has_adaptive_kbd) { 4078 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4079 "GTRW", "dd", 0)) { 4080 pr_err("Cannot read adaptive keyboard mode.\n"); 4081 } 4082 } 4083 } 4084 4085 static void hotkey_resume(void) 4086 { 4087 tpacpi_disable_brightness_delay(); 4088 4089 if (hotkey_status_set(true) < 0 || 4090 hotkey_mask_set(hotkey_acpi_mask) < 0) 4091 pr_err("error while attempting to reset the event " 4092 "firmware interface\n"); 4093 4094 tpacpi_send_radiosw_update(); 4095 hotkey_tablet_mode_notify_change(); 4096 hotkey_wakeup_reason_notify_change(); 4097 hotkey_wakeup_hotunplug_complete_notify_change(); 4098 hotkey_poll_setup_safe(false); 4099 4100 /* restore previous mode of adapive keyboard of X1 Carbon */ 4101 if (tp_features.has_adaptive_kbd) { 4102 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4103 adaptive_keyboard_prev_mode)) { 4104 pr_err("Cannot set adaptive keyboard mode.\n"); 4105 } 4106 } 4107 } 4108 4109 /* procfs -------------------------------------------------------------- */ 4110 static int hotkey_read(struct seq_file *m) 4111 { 4112 int res, status; 4113 4114 if (!tp_features.hotkey) { 4115 seq_printf(m, "status:\t\tnot supported\n"); 4116 return 0; 4117 } 4118 4119 if (mutex_lock_killable(&hotkey_mutex)) 4120 return -ERESTARTSYS; 4121 res = hotkey_status_get(&status); 4122 if (!res) 4123 res = hotkey_mask_get(); 4124 mutex_unlock(&hotkey_mutex); 4125 if (res) 4126 return res; 4127 4128 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4129 if (hotkey_all_mask) { 4130 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4131 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4132 } else { 4133 seq_printf(m, "mask:\t\tnot supported\n"); 4134 seq_printf(m, "commands:\tenable, disable, reset\n"); 4135 } 4136 4137 return 0; 4138 } 4139 4140 static void hotkey_enabledisable_warn(bool enable) 4141 { 4142 tpacpi_log_usertask("procfs hotkey enable/disable"); 4143 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4144 pr_fmt("hotkey enable/disable functionality has been " 4145 "removed from the driver. " 4146 "Hotkeys are always enabled.\n"))) 4147 pr_err("Please remove the hotkey=enable module " 4148 "parameter, it is deprecated. " 4149 "Hotkeys are always enabled.\n"); 4150 } 4151 4152 static int hotkey_write(char *buf) 4153 { 4154 int res; 4155 u32 mask; 4156 char *cmd; 4157 4158 if (!tp_features.hotkey) 4159 return -ENODEV; 4160 4161 if (mutex_lock_killable(&hotkey_mutex)) 4162 return -ERESTARTSYS; 4163 4164 mask = hotkey_user_mask; 4165 4166 res = 0; 4167 while ((cmd = next_cmd(&buf))) { 4168 if (strlencmp(cmd, "enable") == 0) { 4169 hotkey_enabledisable_warn(1); 4170 } else if (strlencmp(cmd, "disable") == 0) { 4171 hotkey_enabledisable_warn(0); 4172 res = -EPERM; 4173 } else if (strlencmp(cmd, "reset") == 0) { 4174 mask = (hotkey_all_mask | hotkey_source_mask) 4175 & ~hotkey_reserved_mask; 4176 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4177 /* mask set */ 4178 } else if (sscanf(cmd, "%x", &mask) == 1) { 4179 /* mask set */ 4180 } else { 4181 res = -EINVAL; 4182 goto errexit; 4183 } 4184 } 4185 4186 if (!res) { 4187 tpacpi_disclose_usertask("procfs hotkey", 4188 "set mask to 0x%08x\n", mask); 4189 res = hotkey_user_mask_set(mask); 4190 } 4191 4192 errexit: 4193 mutex_unlock(&hotkey_mutex); 4194 return res; 4195 } 4196 4197 static const struct acpi_device_id ibm_htk_device_ids[] = { 4198 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4199 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4200 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0}, 4201 {"", 0}, 4202 }; 4203 4204 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4205 .hid = ibm_htk_device_ids, 4206 .notify = hotkey_notify, 4207 .handle = &hkey_handle, 4208 .type = ACPI_DEVICE_NOTIFY, 4209 }; 4210 4211 static struct ibm_struct hotkey_driver_data = { 4212 .name = "hotkey", 4213 .read = hotkey_read, 4214 .write = hotkey_write, 4215 .exit = hotkey_exit, 4216 .resume = hotkey_resume, 4217 .suspend = hotkey_suspend, 4218 .acpi = &ibm_hotkey_acpidriver, 4219 }; 4220 4221 /************************************************************************* 4222 * Bluetooth subdriver 4223 */ 4224 4225 enum { 4226 /* ACPI GBDC/SBDC bits */ 4227 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4228 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4229 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4230 0 = disable, 1 = enable */ 4231 }; 4232 4233 enum { 4234 /* ACPI \BLTH commands */ 4235 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4236 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4237 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4238 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4239 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4240 }; 4241 4242 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4243 4244 static int bluetooth_get_status(void) 4245 { 4246 int status; 4247 4248 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4249 if (dbg_bluetoothemul) 4250 return (tpacpi_bluetooth_emulstate) ? 4251 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4252 #endif 4253 4254 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4255 return -EIO; 4256 4257 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4258 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4259 } 4260 4261 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4262 { 4263 int status; 4264 4265 vdbg_printk(TPACPI_DBG_RFKILL, 4266 "will attempt to %s bluetooth\n", 4267 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4268 4269 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4270 if (dbg_bluetoothemul) { 4271 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4272 return 0; 4273 } 4274 #endif 4275 4276 if (state == TPACPI_RFK_RADIO_ON) 4277 status = TP_ACPI_BLUETOOTH_RADIOSSW 4278 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4279 else 4280 status = 0; 4281 4282 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4283 return -EIO; 4284 4285 return 0; 4286 } 4287 4288 /* sysfs bluetooth enable ---------------------------------------------- */ 4289 static ssize_t bluetooth_enable_show(struct device *dev, 4290 struct device_attribute *attr, 4291 char *buf) 4292 { 4293 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4294 attr, buf); 4295 } 4296 4297 static ssize_t bluetooth_enable_store(struct device *dev, 4298 struct device_attribute *attr, 4299 const char *buf, size_t count) 4300 { 4301 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4302 attr, buf, count); 4303 } 4304 4305 static DEVICE_ATTR_RW(bluetooth_enable); 4306 4307 /* --------------------------------------------------------------------- */ 4308 4309 static struct attribute *bluetooth_attributes[] = { 4310 &dev_attr_bluetooth_enable.attr, 4311 NULL 4312 }; 4313 4314 static const struct attribute_group bluetooth_attr_group = { 4315 .attrs = bluetooth_attributes, 4316 }; 4317 4318 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4319 .get_status = bluetooth_get_status, 4320 .set_status = bluetooth_set_status, 4321 }; 4322 4323 static void bluetooth_shutdown(void) 4324 { 4325 /* Order firmware to save current state to NVRAM */ 4326 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4327 TP_ACPI_BLTH_SAVE_STATE)) 4328 pr_notice("failed to save bluetooth state to NVRAM\n"); 4329 else 4330 vdbg_printk(TPACPI_DBG_RFKILL, 4331 "bluetooth state saved to NVRAM\n"); 4332 } 4333 4334 static void bluetooth_exit(void) 4335 { 4336 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4337 &bluetooth_attr_group); 4338 4339 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4340 4341 bluetooth_shutdown(); 4342 } 4343 4344 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4345 { 4346 int res; 4347 int status = 0; 4348 4349 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4350 "initializing bluetooth subdriver\n"); 4351 4352 TPACPI_ACPIHANDLE_INIT(hkey); 4353 4354 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4355 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4356 tp_features.bluetooth = hkey_handle && 4357 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4358 4359 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4360 "bluetooth is %s, status 0x%02x\n", 4361 str_supported(tp_features.bluetooth), 4362 status); 4363 4364 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4365 if (dbg_bluetoothemul) { 4366 tp_features.bluetooth = 1; 4367 pr_info("bluetooth switch emulation enabled\n"); 4368 } else 4369 #endif 4370 if (tp_features.bluetooth && 4371 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4372 /* no bluetooth hardware present in system */ 4373 tp_features.bluetooth = 0; 4374 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4375 "bluetooth hardware not installed\n"); 4376 } 4377 4378 if (!tp_features.bluetooth) 4379 return 1; 4380 4381 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4382 &bluetooth_tprfk_ops, 4383 RFKILL_TYPE_BLUETOOTH, 4384 TPACPI_RFK_BLUETOOTH_SW_NAME, 4385 true); 4386 if (res) 4387 return res; 4388 4389 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4390 &bluetooth_attr_group); 4391 if (res) { 4392 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4393 return res; 4394 } 4395 4396 return 0; 4397 } 4398 4399 /* procfs -------------------------------------------------------------- */ 4400 static int bluetooth_read(struct seq_file *m) 4401 { 4402 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4403 } 4404 4405 static int bluetooth_write(char *buf) 4406 { 4407 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4408 } 4409 4410 static struct ibm_struct bluetooth_driver_data = { 4411 .name = "bluetooth", 4412 .read = bluetooth_read, 4413 .write = bluetooth_write, 4414 .exit = bluetooth_exit, 4415 .shutdown = bluetooth_shutdown, 4416 }; 4417 4418 /************************************************************************* 4419 * Wan subdriver 4420 */ 4421 4422 enum { 4423 /* ACPI GWAN/SWAN bits */ 4424 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4425 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4426 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4427 0 = disable, 1 = enable */ 4428 }; 4429 4430 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4431 4432 static int wan_get_status(void) 4433 { 4434 int status; 4435 4436 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4437 if (dbg_wwanemul) 4438 return (tpacpi_wwan_emulstate) ? 4439 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4440 #endif 4441 4442 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4443 return -EIO; 4444 4445 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4446 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4447 } 4448 4449 static int wan_set_status(enum tpacpi_rfkill_state state) 4450 { 4451 int status; 4452 4453 vdbg_printk(TPACPI_DBG_RFKILL, 4454 "will attempt to %s wwan\n", 4455 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4456 4457 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4458 if (dbg_wwanemul) { 4459 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4460 return 0; 4461 } 4462 #endif 4463 4464 if (state == TPACPI_RFK_RADIO_ON) 4465 status = TP_ACPI_WANCARD_RADIOSSW 4466 | TP_ACPI_WANCARD_RESUMECTRL; 4467 else 4468 status = 0; 4469 4470 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4471 return -EIO; 4472 4473 return 0; 4474 } 4475 4476 /* sysfs wan enable ---------------------------------------------------- */ 4477 static ssize_t wan_enable_show(struct device *dev, 4478 struct device_attribute *attr, 4479 char *buf) 4480 { 4481 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4482 attr, buf); 4483 } 4484 4485 static ssize_t wan_enable_store(struct device *dev, 4486 struct device_attribute *attr, 4487 const char *buf, size_t count) 4488 { 4489 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4490 attr, buf, count); 4491 } 4492 4493 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4494 wan_enable_show, wan_enable_store); 4495 4496 /* --------------------------------------------------------------------- */ 4497 4498 static struct attribute *wan_attributes[] = { 4499 &dev_attr_wwan_enable.attr, 4500 NULL 4501 }; 4502 4503 static const struct attribute_group wan_attr_group = { 4504 .attrs = wan_attributes, 4505 }; 4506 4507 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4508 .get_status = wan_get_status, 4509 .set_status = wan_set_status, 4510 }; 4511 4512 static void wan_shutdown(void) 4513 { 4514 /* Order firmware to save current state to NVRAM */ 4515 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4516 TP_ACPI_WGSV_SAVE_STATE)) 4517 pr_notice("failed to save WWAN state to NVRAM\n"); 4518 else 4519 vdbg_printk(TPACPI_DBG_RFKILL, 4520 "WWAN state saved to NVRAM\n"); 4521 } 4522 4523 static void wan_exit(void) 4524 { 4525 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4526 &wan_attr_group); 4527 4528 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4529 4530 wan_shutdown(); 4531 } 4532 4533 static int __init wan_init(struct ibm_init_struct *iibm) 4534 { 4535 int res; 4536 int status = 0; 4537 4538 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4539 "initializing wan subdriver\n"); 4540 4541 TPACPI_ACPIHANDLE_INIT(hkey); 4542 4543 tp_features.wan = hkey_handle && 4544 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4545 4546 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4547 "wan is %s, status 0x%02x\n", 4548 str_supported(tp_features.wan), 4549 status); 4550 4551 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4552 if (dbg_wwanemul) { 4553 tp_features.wan = 1; 4554 pr_info("wwan switch emulation enabled\n"); 4555 } else 4556 #endif 4557 if (tp_features.wan && 4558 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4559 /* no wan hardware present in system */ 4560 tp_features.wan = 0; 4561 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4562 "wan hardware not installed\n"); 4563 } 4564 4565 if (!tp_features.wan) 4566 return 1; 4567 4568 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4569 &wan_tprfk_ops, 4570 RFKILL_TYPE_WWAN, 4571 TPACPI_RFK_WWAN_SW_NAME, 4572 true); 4573 if (res) 4574 return res; 4575 4576 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4577 &wan_attr_group); 4578 4579 if (res) { 4580 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4581 return res; 4582 } 4583 4584 return 0; 4585 } 4586 4587 /* procfs -------------------------------------------------------------- */ 4588 static int wan_read(struct seq_file *m) 4589 { 4590 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4591 } 4592 4593 static int wan_write(char *buf) 4594 { 4595 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4596 } 4597 4598 static struct ibm_struct wan_driver_data = { 4599 .name = "wan", 4600 .read = wan_read, 4601 .write = wan_write, 4602 .exit = wan_exit, 4603 .shutdown = wan_shutdown, 4604 }; 4605 4606 /************************************************************************* 4607 * UWB subdriver 4608 */ 4609 4610 enum { 4611 /* ACPI GUWB/SUWB bits */ 4612 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4613 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4614 }; 4615 4616 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4617 4618 static int uwb_get_status(void) 4619 { 4620 int status; 4621 4622 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4623 if (dbg_uwbemul) 4624 return (tpacpi_uwb_emulstate) ? 4625 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4626 #endif 4627 4628 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4629 return -EIO; 4630 4631 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4632 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4633 } 4634 4635 static int uwb_set_status(enum tpacpi_rfkill_state state) 4636 { 4637 int status; 4638 4639 vdbg_printk(TPACPI_DBG_RFKILL, 4640 "will attempt to %s UWB\n", 4641 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4642 4643 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4644 if (dbg_uwbemul) { 4645 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4646 return 0; 4647 } 4648 #endif 4649 4650 if (state == TPACPI_RFK_RADIO_ON) 4651 status = TP_ACPI_UWB_RADIOSSW; 4652 else 4653 status = 0; 4654 4655 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4656 return -EIO; 4657 4658 return 0; 4659 } 4660 4661 /* --------------------------------------------------------------------- */ 4662 4663 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4664 .get_status = uwb_get_status, 4665 .set_status = uwb_set_status, 4666 }; 4667 4668 static void uwb_exit(void) 4669 { 4670 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4671 } 4672 4673 static int __init uwb_init(struct ibm_init_struct *iibm) 4674 { 4675 int res; 4676 int status = 0; 4677 4678 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4679 "initializing uwb subdriver\n"); 4680 4681 TPACPI_ACPIHANDLE_INIT(hkey); 4682 4683 tp_features.uwb = hkey_handle && 4684 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4685 4686 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4687 "uwb is %s, status 0x%02x\n", 4688 str_supported(tp_features.uwb), 4689 status); 4690 4691 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4692 if (dbg_uwbemul) { 4693 tp_features.uwb = 1; 4694 pr_info("uwb switch emulation enabled\n"); 4695 } else 4696 #endif 4697 if (tp_features.uwb && 4698 !(status & TP_ACPI_UWB_HWPRESENT)) { 4699 /* no uwb hardware present in system */ 4700 tp_features.uwb = 0; 4701 dbg_printk(TPACPI_DBG_INIT, 4702 "uwb hardware not installed\n"); 4703 } 4704 4705 if (!tp_features.uwb) 4706 return 1; 4707 4708 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4709 &uwb_tprfk_ops, 4710 RFKILL_TYPE_UWB, 4711 TPACPI_RFK_UWB_SW_NAME, 4712 false); 4713 return res; 4714 } 4715 4716 static struct ibm_struct uwb_driver_data = { 4717 .name = "uwb", 4718 .exit = uwb_exit, 4719 .flags.experimental = 1, 4720 }; 4721 4722 /************************************************************************* 4723 * Video subdriver 4724 */ 4725 4726 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4727 4728 enum video_access_mode { 4729 TPACPI_VIDEO_NONE = 0, 4730 TPACPI_VIDEO_570, /* 570 */ 4731 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4732 TPACPI_VIDEO_NEW, /* all others */ 4733 }; 4734 4735 enum { /* video status flags, based on VIDEO_570 */ 4736 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4737 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4738 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4739 }; 4740 4741 enum { /* TPACPI_VIDEO_570 constants */ 4742 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4743 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4744 * video_status_flags */ 4745 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4746 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4747 }; 4748 4749 static enum video_access_mode video_supported; 4750 static int video_orig_autosw; 4751 4752 static int video_autosw_get(void); 4753 static int video_autosw_set(int enable); 4754 4755 TPACPI_HANDLE(vid, root, 4756 "\\_SB.PCI.AGP.VGA", /* 570 */ 4757 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4758 "\\_SB.PCI0.VID0", /* 770e */ 4759 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4760 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4761 "\\_SB.PCI0.AGP.VID", /* all others */ 4762 ); /* R30, R31 */ 4763 4764 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4765 4766 static int __init video_init(struct ibm_init_struct *iibm) 4767 { 4768 int ivga; 4769 4770 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4771 4772 TPACPI_ACPIHANDLE_INIT(vid); 4773 if (tpacpi_is_ibm()) 4774 TPACPI_ACPIHANDLE_INIT(vid2); 4775 4776 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4777 /* G41, assume IVGA doesn't change */ 4778 vid_handle = vid2_handle; 4779 4780 if (!vid_handle) 4781 /* video switching not supported on R30, R31 */ 4782 video_supported = TPACPI_VIDEO_NONE; 4783 else if (tpacpi_is_ibm() && 4784 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4785 /* 570 */ 4786 video_supported = TPACPI_VIDEO_570; 4787 else if (tpacpi_is_ibm() && 4788 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4789 /* 600e/x, 770e, 770x */ 4790 video_supported = TPACPI_VIDEO_770; 4791 else 4792 /* all others */ 4793 video_supported = TPACPI_VIDEO_NEW; 4794 4795 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4796 str_supported(video_supported != TPACPI_VIDEO_NONE), 4797 video_supported); 4798 4799 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 4800 } 4801 4802 static void video_exit(void) 4803 { 4804 dbg_printk(TPACPI_DBG_EXIT, 4805 "restoring original video autoswitch mode\n"); 4806 if (video_autosw_set(video_orig_autosw)) 4807 pr_err("error while trying to restore original " 4808 "video autoswitch mode\n"); 4809 } 4810 4811 static int video_outputsw_get(void) 4812 { 4813 int status = 0; 4814 int i; 4815 4816 switch (video_supported) { 4817 case TPACPI_VIDEO_570: 4818 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4819 TP_ACPI_VIDEO_570_PHSCMD)) 4820 return -EIO; 4821 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4822 break; 4823 case TPACPI_VIDEO_770: 4824 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4825 return -EIO; 4826 if (i) 4827 status |= TP_ACPI_VIDEO_S_LCD; 4828 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4829 return -EIO; 4830 if (i) 4831 status |= TP_ACPI_VIDEO_S_CRT; 4832 break; 4833 case TPACPI_VIDEO_NEW: 4834 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4835 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4836 return -EIO; 4837 if (i) 4838 status |= TP_ACPI_VIDEO_S_CRT; 4839 4840 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4841 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4842 return -EIO; 4843 if (i) 4844 status |= TP_ACPI_VIDEO_S_LCD; 4845 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4846 return -EIO; 4847 if (i) 4848 status |= TP_ACPI_VIDEO_S_DVI; 4849 break; 4850 default: 4851 return -ENOSYS; 4852 } 4853 4854 return status; 4855 } 4856 4857 static int video_outputsw_set(int status) 4858 { 4859 int autosw; 4860 int res = 0; 4861 4862 switch (video_supported) { 4863 case TPACPI_VIDEO_570: 4864 res = acpi_evalf(NULL, NULL, 4865 "\\_SB.PHS2", "vdd", 4866 TP_ACPI_VIDEO_570_PHS2CMD, 4867 status | TP_ACPI_VIDEO_570_PHS2SET); 4868 break; 4869 case TPACPI_VIDEO_770: 4870 autosw = video_autosw_get(); 4871 if (autosw < 0) 4872 return autosw; 4873 4874 res = video_autosw_set(1); 4875 if (res) 4876 return res; 4877 res = acpi_evalf(vid_handle, NULL, 4878 "ASWT", "vdd", status * 0x100, 0); 4879 if (!autosw && video_autosw_set(autosw)) { 4880 pr_err("video auto-switch left enabled due to error\n"); 4881 return -EIO; 4882 } 4883 break; 4884 case TPACPI_VIDEO_NEW: 4885 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4886 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4887 break; 4888 default: 4889 return -ENOSYS; 4890 } 4891 4892 return (res) ? 0 : -EIO; 4893 } 4894 4895 static int video_autosw_get(void) 4896 { 4897 int autosw = 0; 4898 4899 switch (video_supported) { 4900 case TPACPI_VIDEO_570: 4901 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4902 return -EIO; 4903 break; 4904 case TPACPI_VIDEO_770: 4905 case TPACPI_VIDEO_NEW: 4906 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4907 return -EIO; 4908 break; 4909 default: 4910 return -ENOSYS; 4911 } 4912 4913 return autosw & 1; 4914 } 4915 4916 static int video_autosw_set(int enable) 4917 { 4918 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 4919 return -EIO; 4920 return 0; 4921 } 4922 4923 static int video_outputsw_cycle(void) 4924 { 4925 int autosw = video_autosw_get(); 4926 int res; 4927 4928 if (autosw < 0) 4929 return autosw; 4930 4931 switch (video_supported) { 4932 case TPACPI_VIDEO_570: 4933 res = video_autosw_set(1); 4934 if (res) 4935 return res; 4936 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4937 break; 4938 case TPACPI_VIDEO_770: 4939 case TPACPI_VIDEO_NEW: 4940 res = video_autosw_set(1); 4941 if (res) 4942 return res; 4943 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4944 break; 4945 default: 4946 return -ENOSYS; 4947 } 4948 if (!autosw && video_autosw_set(autosw)) { 4949 pr_err("video auto-switch left enabled due to error\n"); 4950 return -EIO; 4951 } 4952 4953 return (res) ? 0 : -EIO; 4954 } 4955 4956 static int video_expand_toggle(void) 4957 { 4958 switch (video_supported) { 4959 case TPACPI_VIDEO_570: 4960 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 4961 0 : -EIO; 4962 case TPACPI_VIDEO_770: 4963 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 4964 0 : -EIO; 4965 case TPACPI_VIDEO_NEW: 4966 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 4967 0 : -EIO; 4968 default: 4969 return -ENOSYS; 4970 } 4971 /* not reached */ 4972 } 4973 4974 static int video_read(struct seq_file *m) 4975 { 4976 int status, autosw; 4977 4978 if (video_supported == TPACPI_VIDEO_NONE) { 4979 seq_printf(m, "status:\t\tnot supported\n"); 4980 return 0; 4981 } 4982 4983 /* Even reads can crash X.org, so... */ 4984 if (!capable(CAP_SYS_ADMIN)) 4985 return -EPERM; 4986 4987 status = video_outputsw_get(); 4988 if (status < 0) 4989 return status; 4990 4991 autosw = video_autosw_get(); 4992 if (autosw < 0) 4993 return autosw; 4994 4995 seq_printf(m, "status:\t\tsupported\n"); 4996 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4997 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4998 if (video_supported == TPACPI_VIDEO_NEW) 4999 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 5000 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 5001 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5002 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5003 if (video_supported == TPACPI_VIDEO_NEW) 5004 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5005 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5006 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5007 5008 return 0; 5009 } 5010 5011 static int video_write(char *buf) 5012 { 5013 char *cmd; 5014 int enable, disable, status; 5015 int res; 5016 5017 if (video_supported == TPACPI_VIDEO_NONE) 5018 return -ENODEV; 5019 5020 /* Even reads can crash X.org, let alone writes... */ 5021 if (!capable(CAP_SYS_ADMIN)) 5022 return -EPERM; 5023 5024 enable = 0; 5025 disable = 0; 5026 5027 while ((cmd = next_cmd(&buf))) { 5028 if (strlencmp(cmd, "lcd_enable") == 0) { 5029 enable |= TP_ACPI_VIDEO_S_LCD; 5030 } else if (strlencmp(cmd, "lcd_disable") == 0) { 5031 disable |= TP_ACPI_VIDEO_S_LCD; 5032 } else if (strlencmp(cmd, "crt_enable") == 0) { 5033 enable |= TP_ACPI_VIDEO_S_CRT; 5034 } else if (strlencmp(cmd, "crt_disable") == 0) { 5035 disable |= TP_ACPI_VIDEO_S_CRT; 5036 } else if (video_supported == TPACPI_VIDEO_NEW && 5037 strlencmp(cmd, "dvi_enable") == 0) { 5038 enable |= TP_ACPI_VIDEO_S_DVI; 5039 } else if (video_supported == TPACPI_VIDEO_NEW && 5040 strlencmp(cmd, "dvi_disable") == 0) { 5041 disable |= TP_ACPI_VIDEO_S_DVI; 5042 } else if (strlencmp(cmd, "auto_enable") == 0) { 5043 res = video_autosw_set(1); 5044 if (res) 5045 return res; 5046 } else if (strlencmp(cmd, "auto_disable") == 0) { 5047 res = video_autosw_set(0); 5048 if (res) 5049 return res; 5050 } else if (strlencmp(cmd, "video_switch") == 0) { 5051 res = video_outputsw_cycle(); 5052 if (res) 5053 return res; 5054 } else if (strlencmp(cmd, "expand_toggle") == 0) { 5055 res = video_expand_toggle(); 5056 if (res) 5057 return res; 5058 } else 5059 return -EINVAL; 5060 } 5061 5062 if (enable || disable) { 5063 status = video_outputsw_get(); 5064 if (status < 0) 5065 return status; 5066 res = video_outputsw_set((status & ~disable) | enable); 5067 if (res) 5068 return res; 5069 } 5070 5071 return 0; 5072 } 5073 5074 static struct ibm_struct video_driver_data = { 5075 .name = "video", 5076 .read = video_read, 5077 .write = video_write, 5078 .exit = video_exit, 5079 }; 5080 5081 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5082 5083 /************************************************************************* 5084 * Keyboard backlight subdriver 5085 */ 5086 5087 static int kbdlight_set_level(int level) 5088 { 5089 if (!hkey_handle) 5090 return -ENXIO; 5091 5092 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5093 return -EIO; 5094 5095 return 0; 5096 } 5097 5098 static int kbdlight_set_level_and_update(int level); 5099 5100 static int kbdlight_get_level(void) 5101 { 5102 int status = 0; 5103 5104 if (!hkey_handle) 5105 return -ENXIO; 5106 5107 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5108 return -EIO; 5109 5110 if (status < 0) 5111 return status; 5112 5113 return status & 0x3; 5114 } 5115 5116 static bool kbdlight_is_supported(void) 5117 { 5118 int status = 0; 5119 5120 if (!hkey_handle) 5121 return false; 5122 5123 if (!acpi_has_method(hkey_handle, "MLCG")) { 5124 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5125 return false; 5126 } 5127 5128 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5129 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5130 return false; 5131 } 5132 5133 if (status < 0) { 5134 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5135 return false; 5136 } 5137 5138 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5139 /* 5140 * Guessed test for keyboard backlight: 5141 * 5142 * Machines with backlight keyboard return: 5143 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5144 * b110100010010000000XX - ThinkPad x230 5145 * b010100000010000000XX - ThinkPad x240 5146 * b010100000010000000XX - ThinkPad W541 5147 * (XX is current backlight level) 5148 * 5149 * Machines without backlight keyboard return: 5150 * b10100001000000000000 - ThinkPad x230 5151 * b10110001000000000000 - ThinkPad E430 5152 * b00000000000000000000 - ThinkPad E450 5153 * 5154 * Candidate BITs for detection test (XOR): 5155 * b01000000001000000000 5156 * ^ 5157 */ 5158 return status & BIT(9); 5159 } 5160 5161 static void kbdlight_set_worker(struct work_struct *work) 5162 { 5163 struct tpacpi_led_classdev *data = 5164 container_of(work, struct tpacpi_led_classdev, work); 5165 5166 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5167 kbdlight_set_level_and_update(data->new_state); 5168 } 5169 5170 static void kbdlight_sysfs_set(struct led_classdev *led_cdev, 5171 enum led_brightness brightness) 5172 { 5173 struct tpacpi_led_classdev *data = 5174 container_of(led_cdev, 5175 struct tpacpi_led_classdev, 5176 led_classdev); 5177 data->new_state = brightness; 5178 queue_work(tpacpi_wq, &data->work); 5179 } 5180 5181 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5182 { 5183 int level; 5184 5185 level = kbdlight_get_level(); 5186 if (level < 0) 5187 return 0; 5188 5189 return level; 5190 } 5191 5192 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5193 .led_classdev = { 5194 .name = "tpacpi::kbd_backlight", 5195 .max_brightness = 2, 5196 .brightness_set = &kbdlight_sysfs_set, 5197 .brightness_get = &kbdlight_sysfs_get, 5198 } 5199 }; 5200 5201 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5202 { 5203 int rc; 5204 5205 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5206 5207 TPACPI_ACPIHANDLE_INIT(hkey); 5208 INIT_WORK(&tpacpi_led_kbdlight.work, kbdlight_set_worker); 5209 5210 if (!kbdlight_is_supported()) { 5211 tp_features.kbdlight = 0; 5212 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5213 return 1; 5214 } 5215 5216 tp_features.kbdlight = 1; 5217 5218 rc = led_classdev_register(&tpacpi_pdev->dev, 5219 &tpacpi_led_kbdlight.led_classdev); 5220 if (rc < 0) { 5221 tp_features.kbdlight = 0; 5222 return rc; 5223 } 5224 5225 return 0; 5226 } 5227 5228 static void kbdlight_exit(void) 5229 { 5230 if (tp_features.kbdlight) 5231 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5232 flush_workqueue(tpacpi_wq); 5233 } 5234 5235 static int kbdlight_set_level_and_update(int level) 5236 { 5237 int ret; 5238 struct led_classdev *led_cdev; 5239 5240 ret = kbdlight_set_level(level); 5241 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5242 5243 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5244 led_cdev->brightness = level; 5245 5246 return ret; 5247 } 5248 5249 static int kbdlight_read(struct seq_file *m) 5250 { 5251 int level; 5252 5253 if (!tp_features.kbdlight) { 5254 seq_printf(m, "status:\t\tnot supported\n"); 5255 } else { 5256 level = kbdlight_get_level(); 5257 if (level < 0) 5258 seq_printf(m, "status:\t\terror %d\n", level); 5259 else 5260 seq_printf(m, "status:\t\t%d\n", level); 5261 seq_printf(m, "commands:\t0, 1, 2\n"); 5262 } 5263 5264 return 0; 5265 } 5266 5267 static int kbdlight_write(char *buf) 5268 { 5269 char *cmd; 5270 int level = -1; 5271 5272 if (!tp_features.kbdlight) 5273 return -ENODEV; 5274 5275 while ((cmd = next_cmd(&buf))) { 5276 if (strlencmp(cmd, "0") == 0) 5277 level = 0; 5278 else if (strlencmp(cmd, "1") == 0) 5279 level = 1; 5280 else if (strlencmp(cmd, "2") == 0) 5281 level = 2; 5282 else 5283 return -EINVAL; 5284 } 5285 5286 if (level == -1) 5287 return -EINVAL; 5288 5289 return kbdlight_set_level_and_update(level); 5290 } 5291 5292 static void kbdlight_suspend(void) 5293 { 5294 struct led_classdev *led_cdev; 5295 5296 if (!tp_features.kbdlight) 5297 return; 5298 5299 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5300 led_update_brightness(led_cdev); 5301 led_classdev_suspend(led_cdev); 5302 } 5303 5304 static void kbdlight_resume(void) 5305 { 5306 if (!tp_features.kbdlight) 5307 return; 5308 5309 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5310 } 5311 5312 static struct ibm_struct kbdlight_driver_data = { 5313 .name = "kbdlight", 5314 .read = kbdlight_read, 5315 .write = kbdlight_write, 5316 .suspend = kbdlight_suspend, 5317 .resume = kbdlight_resume, 5318 .exit = kbdlight_exit, 5319 }; 5320 5321 /************************************************************************* 5322 * Light (thinklight) subdriver 5323 */ 5324 5325 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5326 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5327 5328 static int light_get_status(void) 5329 { 5330 int status = 0; 5331 5332 if (tp_features.light_status) { 5333 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5334 return -EIO; 5335 return (!!status); 5336 } 5337 5338 return -ENXIO; 5339 } 5340 5341 static int light_set_status(int status) 5342 { 5343 int rc; 5344 5345 if (tp_features.light) { 5346 if (cmos_handle) { 5347 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5348 (status) ? 5349 TP_CMOS_THINKLIGHT_ON : 5350 TP_CMOS_THINKLIGHT_OFF); 5351 } else { 5352 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5353 (status) ? 1 : 0); 5354 } 5355 return (rc) ? 0 : -EIO; 5356 } 5357 5358 return -ENXIO; 5359 } 5360 5361 static void light_set_status_worker(struct work_struct *work) 5362 { 5363 struct tpacpi_led_classdev *data = 5364 container_of(work, struct tpacpi_led_classdev, work); 5365 5366 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5367 light_set_status((data->new_state != TPACPI_LED_OFF)); 5368 } 5369 5370 static void light_sysfs_set(struct led_classdev *led_cdev, 5371 enum led_brightness brightness) 5372 { 5373 struct tpacpi_led_classdev *data = 5374 container_of(led_cdev, 5375 struct tpacpi_led_classdev, 5376 led_classdev); 5377 data->new_state = (brightness != LED_OFF) ? 5378 TPACPI_LED_ON : TPACPI_LED_OFF; 5379 queue_work(tpacpi_wq, &data->work); 5380 } 5381 5382 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5383 { 5384 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5385 } 5386 5387 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5388 .led_classdev = { 5389 .name = "tpacpi::thinklight", 5390 .brightness_set = &light_sysfs_set, 5391 .brightness_get = &light_sysfs_get, 5392 } 5393 }; 5394 5395 static int __init light_init(struct ibm_init_struct *iibm) 5396 { 5397 int rc; 5398 5399 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5400 5401 if (tpacpi_is_ibm()) { 5402 TPACPI_ACPIHANDLE_INIT(ledb); 5403 TPACPI_ACPIHANDLE_INIT(lght); 5404 } 5405 TPACPI_ACPIHANDLE_INIT(cmos); 5406 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 5407 5408 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5409 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5410 5411 if (tp_features.light) 5412 /* light status not supported on 5413 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5414 tp_features.light_status = 5415 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5416 5417 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5418 str_supported(tp_features.light), 5419 str_supported(tp_features.light_status)); 5420 5421 if (!tp_features.light) 5422 return 1; 5423 5424 rc = led_classdev_register(&tpacpi_pdev->dev, 5425 &tpacpi_led_thinklight.led_classdev); 5426 5427 if (rc < 0) { 5428 tp_features.light = 0; 5429 tp_features.light_status = 0; 5430 } else { 5431 rc = 0; 5432 } 5433 5434 return rc; 5435 } 5436 5437 static void light_exit(void) 5438 { 5439 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5440 flush_workqueue(tpacpi_wq); 5441 } 5442 5443 static int light_read(struct seq_file *m) 5444 { 5445 int status; 5446 5447 if (!tp_features.light) { 5448 seq_printf(m, "status:\t\tnot supported\n"); 5449 } else if (!tp_features.light_status) { 5450 seq_printf(m, "status:\t\tunknown\n"); 5451 seq_printf(m, "commands:\ton, off\n"); 5452 } else { 5453 status = light_get_status(); 5454 if (status < 0) 5455 return status; 5456 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5457 seq_printf(m, "commands:\ton, off\n"); 5458 } 5459 5460 return 0; 5461 } 5462 5463 static int light_write(char *buf) 5464 { 5465 char *cmd; 5466 int newstatus = 0; 5467 5468 if (!tp_features.light) 5469 return -ENODEV; 5470 5471 while ((cmd = next_cmd(&buf))) { 5472 if (strlencmp(cmd, "on") == 0) { 5473 newstatus = 1; 5474 } else if (strlencmp(cmd, "off") == 0) { 5475 newstatus = 0; 5476 } else 5477 return -EINVAL; 5478 } 5479 5480 return light_set_status(newstatus); 5481 } 5482 5483 static struct ibm_struct light_driver_data = { 5484 .name = "light", 5485 .read = light_read, 5486 .write = light_write, 5487 .exit = light_exit, 5488 }; 5489 5490 /************************************************************************* 5491 * CMOS subdriver 5492 */ 5493 5494 /* sysfs cmos_command -------------------------------------------------- */ 5495 static ssize_t cmos_command_store(struct device *dev, 5496 struct device_attribute *attr, 5497 const char *buf, size_t count) 5498 { 5499 unsigned long cmos_cmd; 5500 int res; 5501 5502 if (parse_strtoul(buf, 21, &cmos_cmd)) 5503 return -EINVAL; 5504 5505 res = issue_thinkpad_cmos_command(cmos_cmd); 5506 return (res) ? res : count; 5507 } 5508 5509 static DEVICE_ATTR_WO(cmos_command); 5510 5511 /* --------------------------------------------------------------------- */ 5512 5513 static int __init cmos_init(struct ibm_init_struct *iibm) 5514 { 5515 int res; 5516 5517 vdbg_printk(TPACPI_DBG_INIT, 5518 "initializing cmos commands subdriver\n"); 5519 5520 TPACPI_ACPIHANDLE_INIT(cmos); 5521 5522 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5523 str_supported(cmos_handle != NULL)); 5524 5525 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5526 if (res) 5527 return res; 5528 5529 return (cmos_handle) ? 0 : 1; 5530 } 5531 5532 static void cmos_exit(void) 5533 { 5534 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5535 } 5536 5537 static int cmos_read(struct seq_file *m) 5538 { 5539 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5540 R30, R31, T20-22, X20-21 */ 5541 if (!cmos_handle) 5542 seq_printf(m, "status:\t\tnot supported\n"); 5543 else { 5544 seq_printf(m, "status:\t\tsupported\n"); 5545 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5546 } 5547 5548 return 0; 5549 } 5550 5551 static int cmos_write(char *buf) 5552 { 5553 char *cmd; 5554 int cmos_cmd, res; 5555 5556 while ((cmd = next_cmd(&buf))) { 5557 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5558 cmos_cmd >= 0 && cmos_cmd <= 21) { 5559 /* cmos_cmd set */ 5560 } else 5561 return -EINVAL; 5562 5563 res = issue_thinkpad_cmos_command(cmos_cmd); 5564 if (res) 5565 return res; 5566 } 5567 5568 return 0; 5569 } 5570 5571 static struct ibm_struct cmos_driver_data = { 5572 .name = "cmos", 5573 .read = cmos_read, 5574 .write = cmos_write, 5575 .exit = cmos_exit, 5576 }; 5577 5578 /************************************************************************* 5579 * LED subdriver 5580 */ 5581 5582 enum led_access_mode { 5583 TPACPI_LED_NONE = 0, 5584 TPACPI_LED_570, /* 570 */ 5585 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5586 TPACPI_LED_NEW, /* all others */ 5587 }; 5588 5589 enum { /* For TPACPI_LED_OLD */ 5590 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5591 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5592 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5593 }; 5594 5595 static enum led_access_mode led_supported; 5596 5597 static acpi_handle led_handle; 5598 5599 #define TPACPI_LED_NUMLEDS 16 5600 static struct tpacpi_led_classdev *tpacpi_leds; 5601 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5602 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5603 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5604 "tpacpi::power", 5605 "tpacpi:orange:batt", 5606 "tpacpi:green:batt", 5607 "tpacpi::dock_active", 5608 "tpacpi::bay_active", 5609 "tpacpi::dock_batt", 5610 "tpacpi::unknown_led", 5611 "tpacpi::standby", 5612 "tpacpi::dock_status1", 5613 "tpacpi::dock_status2", 5614 "tpacpi::unknown_led2", 5615 "tpacpi::unknown_led3", 5616 "tpacpi::thinkvantage", 5617 }; 5618 #define TPACPI_SAFE_LEDS 0x1081U 5619 5620 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5621 { 5622 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5623 return false; 5624 #else 5625 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5626 #endif 5627 } 5628 5629 static int led_get_status(const unsigned int led) 5630 { 5631 int status; 5632 enum led_status_t led_s; 5633 5634 switch (led_supported) { 5635 case TPACPI_LED_570: 5636 if (!acpi_evalf(ec_handle, 5637 &status, "GLED", "dd", 1 << led)) 5638 return -EIO; 5639 led_s = (status == 0) ? 5640 TPACPI_LED_OFF : 5641 ((status == 1) ? 5642 TPACPI_LED_ON : 5643 TPACPI_LED_BLINK); 5644 tpacpi_led_state_cache[led] = led_s; 5645 return led_s; 5646 default: 5647 return -ENXIO; 5648 } 5649 5650 /* not reached */ 5651 } 5652 5653 static int led_set_status(const unsigned int led, 5654 const enum led_status_t ledstatus) 5655 { 5656 /* off, on, blink. Index is led_status_t */ 5657 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5658 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5659 5660 int rc = 0; 5661 5662 switch (led_supported) { 5663 case TPACPI_LED_570: 5664 /* 570 */ 5665 if (unlikely(led > 7)) 5666 return -EINVAL; 5667 if (unlikely(tpacpi_is_led_restricted(led))) 5668 return -EPERM; 5669 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5670 (1 << led), led_sled_arg1[ledstatus])) 5671 rc = -EIO; 5672 break; 5673 case TPACPI_LED_OLD: 5674 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5675 if (unlikely(led > 7)) 5676 return -EINVAL; 5677 if (unlikely(tpacpi_is_led_restricted(led))) 5678 return -EPERM; 5679 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5680 if (rc >= 0) 5681 rc = ec_write(TPACPI_LED_EC_HLBL, 5682 (ledstatus == TPACPI_LED_BLINK) << led); 5683 if (rc >= 0) 5684 rc = ec_write(TPACPI_LED_EC_HLCL, 5685 (ledstatus != TPACPI_LED_OFF) << led); 5686 break; 5687 case TPACPI_LED_NEW: 5688 /* all others */ 5689 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5690 return -EINVAL; 5691 if (unlikely(tpacpi_is_led_restricted(led))) 5692 return -EPERM; 5693 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5694 led, led_led_arg1[ledstatus])) 5695 rc = -EIO; 5696 break; 5697 default: 5698 rc = -ENXIO; 5699 } 5700 5701 if (!rc) 5702 tpacpi_led_state_cache[led] = ledstatus; 5703 5704 return rc; 5705 } 5706 5707 static void led_set_status_worker(struct work_struct *work) 5708 { 5709 struct tpacpi_led_classdev *data = 5710 container_of(work, struct tpacpi_led_classdev, work); 5711 5712 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5713 led_set_status(data->led, data->new_state); 5714 } 5715 5716 static void led_sysfs_set(struct led_classdev *led_cdev, 5717 enum led_brightness brightness) 5718 { 5719 struct tpacpi_led_classdev *data = container_of(led_cdev, 5720 struct tpacpi_led_classdev, led_classdev); 5721 5722 if (brightness == LED_OFF) 5723 data->new_state = TPACPI_LED_OFF; 5724 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5725 data->new_state = TPACPI_LED_ON; 5726 else 5727 data->new_state = TPACPI_LED_BLINK; 5728 5729 queue_work(tpacpi_wq, &data->work); 5730 } 5731 5732 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5733 unsigned long *delay_on, unsigned long *delay_off) 5734 { 5735 struct tpacpi_led_classdev *data = container_of(led_cdev, 5736 struct tpacpi_led_classdev, led_classdev); 5737 5738 /* Can we choose the flash rate? */ 5739 if (*delay_on == 0 && *delay_off == 0) { 5740 /* yes. set them to the hardware blink rate (1 Hz) */ 5741 *delay_on = 500; /* ms */ 5742 *delay_off = 500; /* ms */ 5743 } else if ((*delay_on != 500) || (*delay_off != 500)) 5744 return -EINVAL; 5745 5746 data->new_state = TPACPI_LED_BLINK; 5747 queue_work(tpacpi_wq, &data->work); 5748 5749 return 0; 5750 } 5751 5752 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5753 { 5754 int rc; 5755 5756 struct tpacpi_led_classdev *data = container_of(led_cdev, 5757 struct tpacpi_led_classdev, led_classdev); 5758 5759 rc = led_get_status(data->led); 5760 5761 if (rc == TPACPI_LED_OFF || rc < 0) 5762 rc = LED_OFF; /* no error handling in led class :( */ 5763 else 5764 rc = LED_FULL; 5765 5766 return rc; 5767 } 5768 5769 static void led_exit(void) 5770 { 5771 unsigned int i; 5772 5773 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5774 if (tpacpi_leds[i].led_classdev.name) 5775 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5776 } 5777 5778 flush_workqueue(tpacpi_wq); 5779 kfree(tpacpi_leds); 5780 } 5781 5782 static int __init tpacpi_init_led(unsigned int led) 5783 { 5784 int rc; 5785 5786 tpacpi_leds[led].led = led; 5787 5788 /* LEDs with no name don't get registered */ 5789 if (!tpacpi_led_names[led]) 5790 return 0; 5791 5792 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5793 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5794 if (led_supported == TPACPI_LED_570) 5795 tpacpi_leds[led].led_classdev.brightness_get = 5796 &led_sysfs_get; 5797 5798 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5799 5800 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5801 5802 rc = led_classdev_register(&tpacpi_pdev->dev, 5803 &tpacpi_leds[led].led_classdev); 5804 if (rc < 0) 5805 tpacpi_leds[led].led_classdev.name = NULL; 5806 5807 return rc; 5808 } 5809 5810 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5811 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5812 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5813 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5814 5815 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5816 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5817 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5818 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5819 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5820 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5821 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5822 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5823 5824 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5825 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5826 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5827 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5828 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5829 5830 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5831 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5832 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5833 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5834 5835 /* (1) - may have excess leds enabled on MSB */ 5836 5837 /* Defaults (order matters, keep last, don't reorder!) */ 5838 { /* Lenovo */ 5839 .vendor = PCI_VENDOR_ID_LENOVO, 5840 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5841 .quirks = 0x1fffU, 5842 }, 5843 { /* IBM ThinkPads with no EC version string */ 5844 .vendor = PCI_VENDOR_ID_IBM, 5845 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5846 .quirks = 0x00ffU, 5847 }, 5848 { /* IBM ThinkPads with EC version string */ 5849 .vendor = PCI_VENDOR_ID_IBM, 5850 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5851 .quirks = 0x00bfU, 5852 }, 5853 }; 5854 5855 #undef TPACPI_LEDQ_IBM 5856 #undef TPACPI_LEDQ_LNV 5857 5858 static enum led_access_mode __init led_init_detect_mode(void) 5859 { 5860 acpi_status status; 5861 5862 if (tpacpi_is_ibm()) { 5863 /* 570 */ 5864 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5865 if (ACPI_SUCCESS(status)) 5866 return TPACPI_LED_570; 5867 5868 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5869 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5870 if (ACPI_SUCCESS(status)) 5871 return TPACPI_LED_OLD; 5872 } 5873 5874 /* most others */ 5875 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5876 if (ACPI_SUCCESS(status)) 5877 return TPACPI_LED_NEW; 5878 5879 /* R30, R31, and unknown firmwares */ 5880 led_handle = NULL; 5881 return TPACPI_LED_NONE; 5882 } 5883 5884 static int __init led_init(struct ibm_init_struct *iibm) 5885 { 5886 unsigned int i; 5887 int rc; 5888 unsigned long useful_leds; 5889 5890 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5891 5892 led_supported = led_init_detect_mode(); 5893 5894 if (led_supported != TPACPI_LED_NONE) { 5895 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5896 ARRAY_SIZE(led_useful_qtable)); 5897 5898 if (!useful_leds) { 5899 led_handle = NULL; 5900 led_supported = TPACPI_LED_NONE; 5901 } 5902 } 5903 5904 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5905 str_supported(led_supported), led_supported); 5906 5907 if (led_supported == TPACPI_LED_NONE) 5908 return 1; 5909 5910 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5911 GFP_KERNEL); 5912 if (!tpacpi_leds) { 5913 pr_err("Out of memory for LED data\n"); 5914 return -ENOMEM; 5915 } 5916 5917 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5918 tpacpi_leds[i].led = -1; 5919 5920 if (!tpacpi_is_led_restricted(i) && 5921 test_bit(i, &useful_leds)) { 5922 rc = tpacpi_init_led(i); 5923 if (rc < 0) { 5924 led_exit(); 5925 return rc; 5926 } 5927 } 5928 } 5929 5930 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5931 pr_notice("warning: userspace override of important " 5932 "firmware LEDs is enabled\n"); 5933 #endif 5934 return 0; 5935 } 5936 5937 #define str_led_status(s) \ 5938 ((s) == TPACPI_LED_OFF ? "off" : \ 5939 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5940 5941 static int led_read(struct seq_file *m) 5942 { 5943 if (!led_supported) { 5944 seq_printf(m, "status:\t\tnot supported\n"); 5945 return 0; 5946 } 5947 seq_printf(m, "status:\t\tsupported\n"); 5948 5949 if (led_supported == TPACPI_LED_570) { 5950 /* 570 */ 5951 int i, status; 5952 for (i = 0; i < 8; i++) { 5953 status = led_get_status(i); 5954 if (status < 0) 5955 return -EIO; 5956 seq_printf(m, "%d:\t\t%s\n", 5957 i, str_led_status(status)); 5958 } 5959 } 5960 5961 seq_printf(m, "commands:\t" 5962 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5963 5964 return 0; 5965 } 5966 5967 static int led_write(char *buf) 5968 { 5969 char *cmd; 5970 int led, rc; 5971 enum led_status_t s; 5972 5973 if (!led_supported) 5974 return -ENODEV; 5975 5976 while ((cmd = next_cmd(&buf))) { 5977 if (sscanf(cmd, "%d", &led) != 1) 5978 return -EINVAL; 5979 5980 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 5981 tpacpi_leds[led].led < 0) 5982 return -ENODEV; 5983 5984 if (strstr(cmd, "off")) { 5985 s = TPACPI_LED_OFF; 5986 } else if (strstr(cmd, "on")) { 5987 s = TPACPI_LED_ON; 5988 } else if (strstr(cmd, "blink")) { 5989 s = TPACPI_LED_BLINK; 5990 } else { 5991 return -EINVAL; 5992 } 5993 5994 rc = led_set_status(led, s); 5995 if (rc < 0) 5996 return rc; 5997 } 5998 5999 return 0; 6000 } 6001 6002 static struct ibm_struct led_driver_data = { 6003 .name = "led", 6004 .read = led_read, 6005 .write = led_write, 6006 .exit = led_exit, 6007 }; 6008 6009 /************************************************************************* 6010 * Beep subdriver 6011 */ 6012 6013 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 6014 6015 #define TPACPI_BEEP_Q1 0x0001 6016 6017 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 6018 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 6019 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 6020 }; 6021 6022 static int __init beep_init(struct ibm_init_struct *iibm) 6023 { 6024 unsigned long quirks; 6025 6026 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 6027 6028 TPACPI_ACPIHANDLE_INIT(beep); 6029 6030 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 6031 str_supported(beep_handle != NULL)); 6032 6033 quirks = tpacpi_check_quirks(beep_quirk_table, 6034 ARRAY_SIZE(beep_quirk_table)); 6035 6036 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6037 6038 return (beep_handle) ? 0 : 1; 6039 } 6040 6041 static int beep_read(struct seq_file *m) 6042 { 6043 if (!beep_handle) 6044 seq_printf(m, "status:\t\tnot supported\n"); 6045 else { 6046 seq_printf(m, "status:\t\tsupported\n"); 6047 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6048 } 6049 6050 return 0; 6051 } 6052 6053 static int beep_write(char *buf) 6054 { 6055 char *cmd; 6056 int beep_cmd; 6057 6058 if (!beep_handle) 6059 return -ENODEV; 6060 6061 while ((cmd = next_cmd(&buf))) { 6062 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6063 beep_cmd >= 0 && beep_cmd <= 17) { 6064 /* beep_cmd set */ 6065 } else 6066 return -EINVAL; 6067 if (tp_features.beep_needs_two_args) { 6068 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6069 beep_cmd, 0)) 6070 return -EIO; 6071 } else { 6072 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6073 beep_cmd)) 6074 return -EIO; 6075 } 6076 } 6077 6078 return 0; 6079 } 6080 6081 static struct ibm_struct beep_driver_data = { 6082 .name = "beep", 6083 .read = beep_read, 6084 .write = beep_write, 6085 }; 6086 6087 /************************************************************************* 6088 * Thermal subdriver 6089 */ 6090 6091 enum thermal_access_mode { 6092 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6093 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6094 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6095 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6096 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6097 }; 6098 6099 enum { /* TPACPI_THERMAL_TPEC_* */ 6100 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6101 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6102 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6103 6104 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6105 }; 6106 6107 6108 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6109 struct ibm_thermal_sensors_struct { 6110 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6111 }; 6112 6113 static enum thermal_access_mode thermal_read_mode; 6114 6115 /* idx is zero-based */ 6116 static int thermal_get_sensor(int idx, s32 *value) 6117 { 6118 int t; 6119 s8 tmp; 6120 char tmpi[5]; 6121 6122 t = TP_EC_THERMAL_TMP0; 6123 6124 switch (thermal_read_mode) { 6125 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6126 case TPACPI_THERMAL_TPEC_16: 6127 if (idx >= 8 && idx <= 15) { 6128 t = TP_EC_THERMAL_TMP8; 6129 idx -= 8; 6130 } 6131 /* fallthrough */ 6132 #endif 6133 case TPACPI_THERMAL_TPEC_8: 6134 if (idx <= 7) { 6135 if (!acpi_ec_read(t + idx, &tmp)) 6136 return -EIO; 6137 *value = tmp * 1000; 6138 return 0; 6139 } 6140 break; 6141 6142 case TPACPI_THERMAL_ACPI_UPDT: 6143 if (idx <= 7) { 6144 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6145 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6146 return -EIO; 6147 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6148 return -EIO; 6149 *value = (t - 2732) * 100; 6150 return 0; 6151 } 6152 break; 6153 6154 case TPACPI_THERMAL_ACPI_TMP07: 6155 if (idx <= 7) { 6156 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6157 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6158 return -EIO; 6159 if (t > 127 || t < -127) 6160 t = TP_EC_THERMAL_TMP_NA; 6161 *value = t * 1000; 6162 return 0; 6163 } 6164 break; 6165 6166 case TPACPI_THERMAL_NONE: 6167 default: 6168 return -ENOSYS; 6169 } 6170 6171 return -EINVAL; 6172 } 6173 6174 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6175 { 6176 int res, i; 6177 int n; 6178 6179 n = 8; 6180 i = 0; 6181 6182 if (!s) 6183 return -EINVAL; 6184 6185 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6186 n = 16; 6187 6188 for (i = 0 ; i < n; i++) { 6189 res = thermal_get_sensor(i, &s->temp[i]); 6190 if (res) 6191 return res; 6192 } 6193 6194 return n; 6195 } 6196 6197 static void thermal_dump_all_sensors(void) 6198 { 6199 int n, i; 6200 struct ibm_thermal_sensors_struct t; 6201 6202 n = thermal_get_sensors(&t); 6203 if (n <= 0) 6204 return; 6205 6206 pr_notice("temperatures (Celsius):"); 6207 6208 for (i = 0; i < n; i++) { 6209 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6210 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6211 else 6212 pr_cont(" N/A"); 6213 } 6214 6215 pr_cont("\n"); 6216 } 6217 6218 /* sysfs temp##_input -------------------------------------------------- */ 6219 6220 static ssize_t thermal_temp_input_show(struct device *dev, 6221 struct device_attribute *attr, 6222 char *buf) 6223 { 6224 struct sensor_device_attribute *sensor_attr = 6225 to_sensor_dev_attr(attr); 6226 int idx = sensor_attr->index; 6227 s32 value; 6228 int res; 6229 6230 res = thermal_get_sensor(idx, &value); 6231 if (res) 6232 return res; 6233 if (value == TPACPI_THERMAL_SENSOR_NA) 6234 return -ENXIO; 6235 6236 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6237 } 6238 6239 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6240 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6241 thermal_temp_input_show, NULL, _idxB) 6242 6243 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6244 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6245 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6246 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6247 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6248 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6249 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6250 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6251 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6252 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6253 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6254 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6255 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6256 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6257 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6258 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6259 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6260 }; 6261 6262 #define THERMAL_ATTRS(X) \ 6263 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6264 6265 static struct attribute *thermal_temp_input_attr[] = { 6266 THERMAL_ATTRS(8), 6267 THERMAL_ATTRS(9), 6268 THERMAL_ATTRS(10), 6269 THERMAL_ATTRS(11), 6270 THERMAL_ATTRS(12), 6271 THERMAL_ATTRS(13), 6272 THERMAL_ATTRS(14), 6273 THERMAL_ATTRS(15), 6274 THERMAL_ATTRS(0), 6275 THERMAL_ATTRS(1), 6276 THERMAL_ATTRS(2), 6277 THERMAL_ATTRS(3), 6278 THERMAL_ATTRS(4), 6279 THERMAL_ATTRS(5), 6280 THERMAL_ATTRS(6), 6281 THERMAL_ATTRS(7), 6282 NULL 6283 }; 6284 6285 static const struct attribute_group thermal_temp_input16_group = { 6286 .attrs = thermal_temp_input_attr 6287 }; 6288 6289 static const struct attribute_group thermal_temp_input8_group = { 6290 .attrs = &thermal_temp_input_attr[8] 6291 }; 6292 6293 #undef THERMAL_SENSOR_ATTR_TEMP 6294 #undef THERMAL_ATTRS 6295 6296 /* --------------------------------------------------------------------- */ 6297 6298 static int __init thermal_init(struct ibm_init_struct *iibm) 6299 { 6300 u8 t, ta1, ta2; 6301 int i; 6302 int acpi_tmp7; 6303 int res; 6304 6305 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6306 6307 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6308 6309 if (thinkpad_id.ec_model) { 6310 /* 6311 * Direct EC access mode: sensors at registers 6312 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6313 * non-implemented, thermal sensors return 0x80 when 6314 * not available 6315 */ 6316 6317 ta1 = ta2 = 0; 6318 for (i = 0; i < 8; i++) { 6319 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6320 ta1 |= t; 6321 } else { 6322 ta1 = 0; 6323 break; 6324 } 6325 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6326 ta2 |= t; 6327 } else { 6328 ta1 = 0; 6329 break; 6330 } 6331 } 6332 if (ta1 == 0) { 6333 /* This is sheer paranoia, but we handle it anyway */ 6334 if (acpi_tmp7) { 6335 pr_err("ThinkPad ACPI EC access misbehaving, " 6336 "falling back to ACPI TMPx access " 6337 "mode\n"); 6338 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6339 } else { 6340 pr_err("ThinkPad ACPI EC access misbehaving, " 6341 "disabling thermal sensors access\n"); 6342 thermal_read_mode = TPACPI_THERMAL_NONE; 6343 } 6344 } else { 6345 thermal_read_mode = 6346 (ta2 != 0) ? 6347 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6348 } 6349 } else if (acpi_tmp7) { 6350 if (tpacpi_is_ibm() && 6351 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6352 /* 600e/x, 770e, 770x */ 6353 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6354 } else { 6355 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6356 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6357 } 6358 } else { 6359 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6360 thermal_read_mode = TPACPI_THERMAL_NONE; 6361 } 6362 6363 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6364 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6365 thermal_read_mode); 6366 6367 switch (thermal_read_mode) { 6368 case TPACPI_THERMAL_TPEC_16: 6369 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 6370 &thermal_temp_input16_group); 6371 if (res) 6372 return res; 6373 break; 6374 case TPACPI_THERMAL_TPEC_8: 6375 case TPACPI_THERMAL_ACPI_TMP07: 6376 case TPACPI_THERMAL_ACPI_UPDT: 6377 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 6378 &thermal_temp_input8_group); 6379 if (res) 6380 return res; 6381 break; 6382 case TPACPI_THERMAL_NONE: 6383 default: 6384 return 1; 6385 } 6386 6387 return 0; 6388 } 6389 6390 static void thermal_exit(void) 6391 { 6392 switch (thermal_read_mode) { 6393 case TPACPI_THERMAL_TPEC_16: 6394 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 6395 &thermal_temp_input16_group); 6396 break; 6397 case TPACPI_THERMAL_TPEC_8: 6398 case TPACPI_THERMAL_ACPI_TMP07: 6399 case TPACPI_THERMAL_ACPI_UPDT: 6400 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 6401 &thermal_temp_input8_group); 6402 break; 6403 case TPACPI_THERMAL_NONE: 6404 default: 6405 break; 6406 } 6407 } 6408 6409 static int thermal_read(struct seq_file *m) 6410 { 6411 int n, i; 6412 struct ibm_thermal_sensors_struct t; 6413 6414 n = thermal_get_sensors(&t); 6415 if (unlikely(n < 0)) 6416 return n; 6417 6418 seq_printf(m, "temperatures:\t"); 6419 6420 if (n > 0) { 6421 for (i = 0; i < (n - 1); i++) 6422 seq_printf(m, "%d ", t.temp[i] / 1000); 6423 seq_printf(m, "%d\n", t.temp[i] / 1000); 6424 } else 6425 seq_printf(m, "not supported\n"); 6426 6427 return 0; 6428 } 6429 6430 static struct ibm_struct thermal_driver_data = { 6431 .name = "thermal", 6432 .read = thermal_read, 6433 .exit = thermal_exit, 6434 }; 6435 6436 /************************************************************************* 6437 * Backlight/brightness subdriver 6438 */ 6439 6440 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6441 6442 /* 6443 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6444 * CMOS NVRAM byte 0x5E, bits 0-3. 6445 * 6446 * EC HBRV (0x31) has the following layout 6447 * Bit 7: unknown function 6448 * Bit 6: unknown function 6449 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6450 * Bit 4: must be set to zero to avoid problems 6451 * Bit 3-0: backlight brightness level 6452 * 6453 * brightness_get_raw returns status data in the HBRV layout 6454 * 6455 * WARNING: The X61 has been verified to use HBRV for something else, so 6456 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6457 * testing on the very early *60 Lenovo models... 6458 */ 6459 6460 enum { 6461 TP_EC_BACKLIGHT = 0x31, 6462 6463 /* TP_EC_BACKLIGHT bitmasks */ 6464 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6465 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6466 TP_EC_BACKLIGHT_MAPSW = 0x20, 6467 }; 6468 6469 enum tpacpi_brightness_access_mode { 6470 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6471 TPACPI_BRGHT_MODE_EC, /* EC control */ 6472 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6473 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6474 TPACPI_BRGHT_MODE_MAX 6475 }; 6476 6477 static struct backlight_device *ibm_backlight_device; 6478 6479 static enum tpacpi_brightness_access_mode brightness_mode = 6480 TPACPI_BRGHT_MODE_MAX; 6481 6482 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6483 6484 static struct mutex brightness_mutex; 6485 6486 /* NVRAM brightness access, 6487 * call with brightness_mutex held! */ 6488 static unsigned int tpacpi_brightness_nvram_get(void) 6489 { 6490 u8 lnvram; 6491 6492 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6493 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6494 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6495 lnvram &= bright_maxlvl; 6496 6497 return lnvram; 6498 } 6499 6500 static void tpacpi_brightness_checkpoint_nvram(void) 6501 { 6502 u8 lec = 0; 6503 u8 b_nvram; 6504 6505 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6506 return; 6507 6508 vdbg_printk(TPACPI_DBG_BRGHT, 6509 "trying to checkpoint backlight level to NVRAM...\n"); 6510 6511 if (mutex_lock_killable(&brightness_mutex) < 0) 6512 return; 6513 6514 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6515 goto unlock; 6516 lec &= TP_EC_BACKLIGHT_LVLMSK; 6517 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6518 6519 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6520 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6521 /* NVRAM needs update */ 6522 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6523 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6524 b_nvram |= lec; 6525 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6526 dbg_printk(TPACPI_DBG_BRGHT, 6527 "updated NVRAM backlight level to %u (0x%02x)\n", 6528 (unsigned int) lec, (unsigned int) b_nvram); 6529 } else 6530 vdbg_printk(TPACPI_DBG_BRGHT, 6531 "NVRAM backlight level already is %u (0x%02x)\n", 6532 (unsigned int) lec, (unsigned int) b_nvram); 6533 6534 unlock: 6535 mutex_unlock(&brightness_mutex); 6536 } 6537 6538 6539 /* call with brightness_mutex held! */ 6540 static int tpacpi_brightness_get_raw(int *status) 6541 { 6542 u8 lec = 0; 6543 6544 switch (brightness_mode) { 6545 case TPACPI_BRGHT_MODE_UCMS_STEP: 6546 *status = tpacpi_brightness_nvram_get(); 6547 return 0; 6548 case TPACPI_BRGHT_MODE_EC: 6549 case TPACPI_BRGHT_MODE_ECNVRAM: 6550 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6551 return -EIO; 6552 *status = lec; 6553 return 0; 6554 default: 6555 return -ENXIO; 6556 } 6557 } 6558 6559 /* call with brightness_mutex held! */ 6560 /* do NOT call with illegal backlight level value */ 6561 static int tpacpi_brightness_set_ec(unsigned int value) 6562 { 6563 u8 lec = 0; 6564 6565 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6566 return -EIO; 6567 6568 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6569 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6570 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6571 return -EIO; 6572 6573 return 0; 6574 } 6575 6576 /* call with brightness_mutex held! */ 6577 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6578 { 6579 int cmos_cmd, inc; 6580 unsigned int current_value, i; 6581 6582 current_value = tpacpi_brightness_nvram_get(); 6583 6584 if (value == current_value) 6585 return 0; 6586 6587 cmos_cmd = (value > current_value) ? 6588 TP_CMOS_BRIGHTNESS_UP : 6589 TP_CMOS_BRIGHTNESS_DOWN; 6590 inc = (value > current_value) ? 1 : -1; 6591 6592 for (i = current_value; i != value; i += inc) 6593 if (issue_thinkpad_cmos_command(cmos_cmd)) 6594 return -EIO; 6595 6596 return 0; 6597 } 6598 6599 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6600 static int brightness_set(unsigned int value) 6601 { 6602 int res; 6603 6604 if (value > bright_maxlvl) 6605 return -EINVAL; 6606 6607 vdbg_printk(TPACPI_DBG_BRGHT, 6608 "set backlight level to %d\n", value); 6609 6610 res = mutex_lock_killable(&brightness_mutex); 6611 if (res < 0) 6612 return res; 6613 6614 switch (brightness_mode) { 6615 case TPACPI_BRGHT_MODE_EC: 6616 case TPACPI_BRGHT_MODE_ECNVRAM: 6617 res = tpacpi_brightness_set_ec(value); 6618 break; 6619 case TPACPI_BRGHT_MODE_UCMS_STEP: 6620 res = tpacpi_brightness_set_ucmsstep(value); 6621 break; 6622 default: 6623 res = -ENXIO; 6624 } 6625 6626 mutex_unlock(&brightness_mutex); 6627 return res; 6628 } 6629 6630 /* sysfs backlight class ----------------------------------------------- */ 6631 6632 static int brightness_update_status(struct backlight_device *bd) 6633 { 6634 unsigned int level = 6635 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6636 bd->props.power == FB_BLANK_UNBLANK) ? 6637 bd->props.brightness : 0; 6638 6639 dbg_printk(TPACPI_DBG_BRGHT, 6640 "backlight: attempt to set level to %d\n", 6641 level); 6642 6643 /* it is the backlight class's job (caller) to handle 6644 * EINTR and other errors properly */ 6645 return brightness_set(level); 6646 } 6647 6648 static int brightness_get(struct backlight_device *bd) 6649 { 6650 int status, res; 6651 6652 res = mutex_lock_killable(&brightness_mutex); 6653 if (res < 0) 6654 return 0; 6655 6656 res = tpacpi_brightness_get_raw(&status); 6657 6658 mutex_unlock(&brightness_mutex); 6659 6660 if (res < 0) 6661 return 0; 6662 6663 return status & TP_EC_BACKLIGHT_LVLMSK; 6664 } 6665 6666 static void tpacpi_brightness_notify_change(void) 6667 { 6668 backlight_force_update(ibm_backlight_device, 6669 BACKLIGHT_UPDATE_HOTKEY); 6670 } 6671 6672 static const struct backlight_ops ibm_backlight_data = { 6673 .get_brightness = brightness_get, 6674 .update_status = brightness_update_status, 6675 }; 6676 6677 /* --------------------------------------------------------------------- */ 6678 6679 /* 6680 * Call _BCL method of video device. On some ThinkPads this will 6681 * switch the firmware to the ACPI brightness control mode. 6682 */ 6683 6684 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6685 { 6686 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6687 union acpi_object *obj; 6688 struct acpi_device *device, *child; 6689 int rc; 6690 6691 if (acpi_bus_get_device(handle, &device)) 6692 return 0; 6693 6694 rc = 0; 6695 list_for_each_entry(child, &device->children, node) { 6696 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6697 NULL, &buffer); 6698 if (ACPI_FAILURE(status)) 6699 continue; 6700 6701 obj = (union acpi_object *)buffer.pointer; 6702 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6703 pr_err("Unknown _BCL data, please report this to %s\n", 6704 TPACPI_MAIL); 6705 rc = 0; 6706 } else { 6707 rc = obj->package.count; 6708 } 6709 break; 6710 } 6711 6712 kfree(buffer.pointer); 6713 return rc; 6714 } 6715 6716 6717 /* 6718 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6719 */ 6720 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6721 { 6722 acpi_handle video_device; 6723 int bcl_levels = 0; 6724 6725 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6726 if (video_device) 6727 bcl_levels = tpacpi_query_bcl_levels(video_device); 6728 6729 tp_features.bright_acpimode = (bcl_levels > 0); 6730 6731 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6732 } 6733 6734 /* 6735 * These are only useful for models that have only one possibility 6736 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6737 * these quirks. 6738 */ 6739 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6740 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6741 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6742 6743 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6744 /* Models with ATI GPUs known to require ECNVRAM mode */ 6745 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6746 6747 /* Models with ATI GPUs that can use ECNVRAM */ 6748 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6749 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6750 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6751 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6752 6753 /* Models with Intel Extreme Graphics 2 */ 6754 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6755 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6756 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6757 6758 /* Models with Intel GMA900 */ 6759 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6760 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6761 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6762 }; 6763 6764 /* 6765 * Returns < 0 for error, otherwise sets tp_features.bright_* 6766 * and bright_maxlvl. 6767 */ 6768 static void __init tpacpi_detect_brightness_capabilities(void) 6769 { 6770 unsigned int b; 6771 6772 vdbg_printk(TPACPI_DBG_INIT, 6773 "detecting firmware brightness interface capabilities\n"); 6774 6775 /* we could run a quirks check here (same table used by 6776 * brightness_init) if needed */ 6777 6778 /* 6779 * We always attempt to detect acpi support, so as to switch 6780 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6781 * going to publish a backlight interface 6782 */ 6783 b = tpacpi_check_std_acpi_brightness_support(); 6784 switch (b) { 6785 case 16: 6786 bright_maxlvl = 15; 6787 break; 6788 case 8: 6789 case 0: 6790 bright_maxlvl = 7; 6791 break; 6792 default: 6793 tp_features.bright_unkfw = 1; 6794 bright_maxlvl = b - 1; 6795 } 6796 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6797 } 6798 6799 static int __init brightness_init(struct ibm_init_struct *iibm) 6800 { 6801 struct backlight_properties props; 6802 int b; 6803 unsigned long quirks; 6804 6805 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6806 6807 mutex_init(&brightness_mutex); 6808 6809 quirks = tpacpi_check_quirks(brightness_quirk_table, 6810 ARRAY_SIZE(brightness_quirk_table)); 6811 6812 /* tpacpi_detect_brightness_capabilities() must have run already */ 6813 6814 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6815 if (tp_features.bright_unkfw) 6816 return 1; 6817 6818 if (!brightness_enable) { 6819 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6820 "brightness support disabled by " 6821 "module parameter\n"); 6822 return 1; 6823 } 6824 6825 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6826 if (brightness_enable > 1) { 6827 pr_info("Standard ACPI backlight interface " 6828 "available, not loading native one\n"); 6829 return 1; 6830 } else if (brightness_enable == 1) { 6831 pr_warn("Cannot enable backlight brightness support, " 6832 "ACPI is already handling it. Refer to the " 6833 "acpi_backlight kernel parameter.\n"); 6834 return 1; 6835 } 6836 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6837 pr_notice("Standard ACPI backlight interface not " 6838 "available, thinkpad_acpi native " 6839 "brightness control enabled\n"); 6840 } 6841 6842 /* 6843 * Check for module parameter bogosity, note that we 6844 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6845 * able to detect "unspecified" 6846 */ 6847 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6848 return -EINVAL; 6849 6850 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6851 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6852 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6853 if (quirks & TPACPI_BRGHT_Q_EC) 6854 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6855 else 6856 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6857 6858 dbg_printk(TPACPI_DBG_BRGHT, 6859 "driver auto-selected brightness_mode=%d\n", 6860 brightness_mode); 6861 } 6862 6863 /* Safety */ 6864 if (!tpacpi_is_ibm() && 6865 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6866 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6867 return -EINVAL; 6868 6869 if (tpacpi_brightness_get_raw(&b) < 0) 6870 return 1; 6871 6872 memset(&props, 0, sizeof(struct backlight_properties)); 6873 props.type = BACKLIGHT_PLATFORM; 6874 props.max_brightness = bright_maxlvl; 6875 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6876 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6877 NULL, NULL, 6878 &ibm_backlight_data, 6879 &props); 6880 if (IS_ERR(ibm_backlight_device)) { 6881 int rc = PTR_ERR(ibm_backlight_device); 6882 ibm_backlight_device = NULL; 6883 pr_err("Could not register backlight device\n"); 6884 return rc; 6885 } 6886 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6887 "brightness is supported\n"); 6888 6889 if (quirks & TPACPI_BRGHT_Q_ASK) { 6890 pr_notice("brightness: will use unverified default: " 6891 "brightness_mode=%d\n", brightness_mode); 6892 pr_notice("brightness: please report to %s whether it works well " 6893 "or not on your ThinkPad\n", TPACPI_MAIL); 6894 } 6895 6896 /* Added by mistake in early 2007. Probably useless, but it could 6897 * be working around some unknown firmware problem where the value 6898 * read at startup doesn't match the real hardware state... so leave 6899 * it in place just in case */ 6900 backlight_update_status(ibm_backlight_device); 6901 6902 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6903 "brightness: registering brightness hotkeys " 6904 "as change notification\n"); 6905 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6906 | TP_ACPI_HKEY_BRGHTUP_MASK 6907 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6908 return 0; 6909 } 6910 6911 static void brightness_suspend(void) 6912 { 6913 tpacpi_brightness_checkpoint_nvram(); 6914 } 6915 6916 static void brightness_shutdown(void) 6917 { 6918 tpacpi_brightness_checkpoint_nvram(); 6919 } 6920 6921 static void brightness_exit(void) 6922 { 6923 if (ibm_backlight_device) { 6924 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6925 "calling backlight_device_unregister()\n"); 6926 backlight_device_unregister(ibm_backlight_device); 6927 } 6928 6929 tpacpi_brightness_checkpoint_nvram(); 6930 } 6931 6932 static int brightness_read(struct seq_file *m) 6933 { 6934 int level; 6935 6936 level = brightness_get(NULL); 6937 if (level < 0) { 6938 seq_printf(m, "level:\t\tunreadable\n"); 6939 } else { 6940 seq_printf(m, "level:\t\t%d\n", level); 6941 seq_printf(m, "commands:\tup, down\n"); 6942 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6943 bright_maxlvl); 6944 } 6945 6946 return 0; 6947 } 6948 6949 static int brightness_write(char *buf) 6950 { 6951 int level; 6952 int rc; 6953 char *cmd; 6954 6955 level = brightness_get(NULL); 6956 if (level < 0) 6957 return level; 6958 6959 while ((cmd = next_cmd(&buf))) { 6960 if (strlencmp(cmd, "up") == 0) { 6961 if (level < bright_maxlvl) 6962 level++; 6963 } else if (strlencmp(cmd, "down") == 0) { 6964 if (level > 0) 6965 level--; 6966 } else if (sscanf(cmd, "level %d", &level) == 1 && 6967 level >= 0 && level <= bright_maxlvl) { 6968 /* new level set */ 6969 } else 6970 return -EINVAL; 6971 } 6972 6973 tpacpi_disclose_usertask("procfs brightness", 6974 "set level to %d\n", level); 6975 6976 /* 6977 * Now we know what the final level should be, so we try to set it. 6978 * Doing it this way makes the syscall restartable in case of EINTR 6979 */ 6980 rc = brightness_set(level); 6981 if (!rc && ibm_backlight_device) 6982 backlight_force_update(ibm_backlight_device, 6983 BACKLIGHT_UPDATE_SYSFS); 6984 return (rc == -EINTR) ? -ERESTARTSYS : rc; 6985 } 6986 6987 static struct ibm_struct brightness_driver_data = { 6988 .name = "brightness", 6989 .read = brightness_read, 6990 .write = brightness_write, 6991 .exit = brightness_exit, 6992 .suspend = brightness_suspend, 6993 .shutdown = brightness_shutdown, 6994 }; 6995 6996 /************************************************************************* 6997 * Volume subdriver 6998 */ 6999 7000 /* 7001 * IBM ThinkPads have a simple volume controller with MUTE gating. 7002 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 7003 * 7004 * Since the *61 series (and probably also the later *60 series), Lenovo 7005 * ThinkPads only implement the MUTE gate. 7006 * 7007 * EC register 0x30 7008 * Bit 6: MUTE (1 mutes sound) 7009 * Bit 3-0: Volume 7010 * Other bits should be zero as far as we know. 7011 * 7012 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 7013 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 7014 * such as bit 7 which is used to detect repeated presses of MUTE, 7015 * and we leave them unchanged. 7016 * 7017 * On newer Lenovo ThinkPads, the EC can automatically change the volume 7018 * in response to user input. Unfortunately, this rarely works well. 7019 * The laptop changes the state of its internal MUTE gate and, on some 7020 * models, sends KEY_MUTE, causing any user code that responds to the 7021 * mute button to get confused. The hardware MUTE gate is also 7022 * unnecessary, since user code can handle the mute button without 7023 * kernel or EC help. 7024 * 7025 * To avoid confusing userspace, we simply disable all EC-based mute 7026 * and volume controls when possible. 7027 */ 7028 7029 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 7030 7031 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 7032 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 7033 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7034 7035 #if SNDRV_CARDS <= 32 7036 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7037 #else 7038 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7039 #endif 7040 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7041 static char *alsa_id = "ThinkPadEC"; 7042 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7043 7044 struct tpacpi_alsa_data { 7045 struct snd_card *card; 7046 struct snd_ctl_elem_id *ctl_mute_id; 7047 struct snd_ctl_elem_id *ctl_vol_id; 7048 }; 7049 7050 static struct snd_card *alsa_card; 7051 7052 enum { 7053 TP_EC_AUDIO = 0x30, 7054 7055 /* TP_EC_AUDIO bits */ 7056 TP_EC_AUDIO_MUTESW = 6, 7057 7058 /* TP_EC_AUDIO bitmasks */ 7059 TP_EC_AUDIO_LVL_MSK = 0x0F, 7060 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7061 7062 /* Maximum volume */ 7063 TP_EC_VOLUME_MAX = 14, 7064 }; 7065 7066 enum tpacpi_volume_access_mode { 7067 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7068 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7069 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7070 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7071 TPACPI_VOL_MODE_MAX 7072 }; 7073 7074 enum tpacpi_volume_capabilities { 7075 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7076 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7077 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7078 TPACPI_VOL_CAP_MAX 7079 }; 7080 7081 enum tpacpi_mute_btn_mode { 7082 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7083 /* We don't know what mode 1 is. */ 7084 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7085 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7086 }; 7087 7088 static enum tpacpi_volume_access_mode volume_mode = 7089 TPACPI_VOL_MODE_MAX; 7090 7091 static enum tpacpi_volume_capabilities volume_capabilities; 7092 static bool volume_control_allowed; 7093 static bool software_mute_requested = true; 7094 static bool software_mute_active; 7095 static int software_mute_orig_mode; 7096 7097 /* 7098 * Used to syncronize writers to TP_EC_AUDIO and 7099 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7100 */ 7101 static struct mutex volume_mutex; 7102 7103 static void tpacpi_volume_checkpoint_nvram(void) 7104 { 7105 u8 lec = 0; 7106 u8 b_nvram; 7107 u8 ec_mask; 7108 7109 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7110 return; 7111 if (!volume_control_allowed) 7112 return; 7113 if (software_mute_active) 7114 return; 7115 7116 vdbg_printk(TPACPI_DBG_MIXER, 7117 "trying to checkpoint mixer state to NVRAM...\n"); 7118 7119 if (tp_features.mixer_no_level_control) 7120 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7121 else 7122 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7123 7124 if (mutex_lock_killable(&volume_mutex) < 0) 7125 return; 7126 7127 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7128 goto unlock; 7129 lec &= ec_mask; 7130 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7131 7132 if (lec != (b_nvram & ec_mask)) { 7133 /* NVRAM needs update */ 7134 b_nvram &= ~ec_mask; 7135 b_nvram |= lec; 7136 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7137 dbg_printk(TPACPI_DBG_MIXER, 7138 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7139 (unsigned int) lec, (unsigned int) b_nvram); 7140 } else { 7141 vdbg_printk(TPACPI_DBG_MIXER, 7142 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7143 (unsigned int) lec, (unsigned int) b_nvram); 7144 } 7145 7146 unlock: 7147 mutex_unlock(&volume_mutex); 7148 } 7149 7150 static int volume_get_status_ec(u8 *status) 7151 { 7152 u8 s; 7153 7154 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7155 return -EIO; 7156 7157 *status = s; 7158 7159 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7160 7161 return 0; 7162 } 7163 7164 static int volume_get_status(u8 *status) 7165 { 7166 return volume_get_status_ec(status); 7167 } 7168 7169 static int volume_set_status_ec(const u8 status) 7170 { 7171 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7172 return -EIO; 7173 7174 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7175 7176 /* 7177 * On X200s, and possibly on others, it can take a while for 7178 * reads to become correct. 7179 */ 7180 msleep(1); 7181 7182 return 0; 7183 } 7184 7185 static int volume_set_status(const u8 status) 7186 { 7187 return volume_set_status_ec(status); 7188 } 7189 7190 /* returns < 0 on error, 0 on no change, 1 on change */ 7191 static int __volume_set_mute_ec(const bool mute) 7192 { 7193 int rc; 7194 u8 s, n; 7195 7196 if (mutex_lock_killable(&volume_mutex) < 0) 7197 return -EINTR; 7198 7199 rc = volume_get_status_ec(&s); 7200 if (rc) 7201 goto unlock; 7202 7203 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7204 s & ~TP_EC_AUDIO_MUTESW_MSK; 7205 7206 if (n != s) { 7207 rc = volume_set_status_ec(n); 7208 if (!rc) 7209 rc = 1; 7210 } 7211 7212 unlock: 7213 mutex_unlock(&volume_mutex); 7214 return rc; 7215 } 7216 7217 static int volume_alsa_set_mute(const bool mute) 7218 { 7219 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7220 (mute) ? "" : "un"); 7221 return __volume_set_mute_ec(mute); 7222 } 7223 7224 static int volume_set_mute(const bool mute) 7225 { 7226 int rc; 7227 7228 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7229 (mute) ? "" : "un"); 7230 7231 rc = __volume_set_mute_ec(mute); 7232 return (rc < 0) ? rc : 0; 7233 } 7234 7235 /* returns < 0 on error, 0 on no change, 1 on change */ 7236 static int __volume_set_volume_ec(const u8 vol) 7237 { 7238 int rc; 7239 u8 s, n; 7240 7241 if (vol > TP_EC_VOLUME_MAX) 7242 return -EINVAL; 7243 7244 if (mutex_lock_killable(&volume_mutex) < 0) 7245 return -EINTR; 7246 7247 rc = volume_get_status_ec(&s); 7248 if (rc) 7249 goto unlock; 7250 7251 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7252 7253 if (n != s) { 7254 rc = volume_set_status_ec(n); 7255 if (!rc) 7256 rc = 1; 7257 } 7258 7259 unlock: 7260 mutex_unlock(&volume_mutex); 7261 return rc; 7262 } 7263 7264 static int volume_set_software_mute(bool startup) 7265 { 7266 int result; 7267 7268 if (!tpacpi_is_lenovo()) 7269 return -ENODEV; 7270 7271 if (startup) { 7272 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7273 "HAUM", "qd")) 7274 return -EIO; 7275 7276 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7277 "Initial HAUM setting was %d\n", 7278 software_mute_orig_mode); 7279 } 7280 7281 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7282 (int)TP_EC_MUTE_BTN_NONE)) 7283 return -EIO; 7284 7285 if (result != TP_EC_MUTE_BTN_NONE) 7286 pr_warn("Unexpected SAUM result %d\n", 7287 result); 7288 7289 /* 7290 * In software mute mode, the standard codec controls take 7291 * precendence, so we unmute the ThinkPad HW switch at 7292 * startup. Just on case there are SAUM-capable ThinkPads 7293 * with level controls, set max HW volume as well. 7294 */ 7295 if (tp_features.mixer_no_level_control) 7296 result = volume_set_mute(false); 7297 else 7298 result = volume_set_status(TP_EC_VOLUME_MAX); 7299 7300 if (result != 0) 7301 pr_warn("Failed to unmute the HW mute switch\n"); 7302 7303 return 0; 7304 } 7305 7306 static void volume_exit_software_mute(void) 7307 { 7308 int r; 7309 7310 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7311 || r != software_mute_orig_mode) 7312 pr_warn("Failed to restore mute mode\n"); 7313 } 7314 7315 static int volume_alsa_set_volume(const u8 vol) 7316 { 7317 dbg_printk(TPACPI_DBG_MIXER, 7318 "ALSA: trying to set volume level to %hu\n", vol); 7319 return __volume_set_volume_ec(vol); 7320 } 7321 7322 static void volume_alsa_notify_change(void) 7323 { 7324 struct tpacpi_alsa_data *d; 7325 7326 if (alsa_card && alsa_card->private_data) { 7327 d = alsa_card->private_data; 7328 if (d->ctl_mute_id) 7329 snd_ctl_notify(alsa_card, 7330 SNDRV_CTL_EVENT_MASK_VALUE, 7331 d->ctl_mute_id); 7332 if (d->ctl_vol_id) 7333 snd_ctl_notify(alsa_card, 7334 SNDRV_CTL_EVENT_MASK_VALUE, 7335 d->ctl_vol_id); 7336 } 7337 } 7338 7339 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7340 struct snd_ctl_elem_info *uinfo) 7341 { 7342 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7343 uinfo->count = 1; 7344 uinfo->value.integer.min = 0; 7345 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7346 return 0; 7347 } 7348 7349 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7350 struct snd_ctl_elem_value *ucontrol) 7351 { 7352 u8 s; 7353 int rc; 7354 7355 rc = volume_get_status(&s); 7356 if (rc < 0) 7357 return rc; 7358 7359 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7360 return 0; 7361 } 7362 7363 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7364 struct snd_ctl_elem_value *ucontrol) 7365 { 7366 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7367 ucontrol->value.integer.value[0]); 7368 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7369 } 7370 7371 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7372 7373 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7374 struct snd_ctl_elem_value *ucontrol) 7375 { 7376 u8 s; 7377 int rc; 7378 7379 rc = volume_get_status(&s); 7380 if (rc < 0) 7381 return rc; 7382 7383 ucontrol->value.integer.value[0] = 7384 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7385 return 0; 7386 } 7387 7388 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7389 struct snd_ctl_elem_value *ucontrol) 7390 { 7391 tpacpi_disclose_usertask("ALSA", "%smute\n", 7392 ucontrol->value.integer.value[0] ? 7393 "un" : ""); 7394 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7395 } 7396 7397 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7398 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7399 .name = "Console Playback Volume", 7400 .index = 0, 7401 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7402 .info = volume_alsa_vol_info, 7403 .get = volume_alsa_vol_get, 7404 }; 7405 7406 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7407 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7408 .name = "Console Playback Switch", 7409 .index = 0, 7410 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7411 .info = volume_alsa_mute_info, 7412 .get = volume_alsa_mute_get, 7413 }; 7414 7415 static void volume_suspend(void) 7416 { 7417 tpacpi_volume_checkpoint_nvram(); 7418 } 7419 7420 static void volume_resume(void) 7421 { 7422 if (software_mute_active) { 7423 if (volume_set_software_mute(false) < 0) 7424 pr_warn("Failed to restore software mute\n"); 7425 } else { 7426 volume_alsa_notify_change(); 7427 } 7428 } 7429 7430 static void volume_shutdown(void) 7431 { 7432 tpacpi_volume_checkpoint_nvram(); 7433 } 7434 7435 static void volume_exit(void) 7436 { 7437 if (alsa_card) { 7438 snd_card_free(alsa_card); 7439 alsa_card = NULL; 7440 } 7441 7442 tpacpi_volume_checkpoint_nvram(); 7443 7444 if (software_mute_active) 7445 volume_exit_software_mute(); 7446 } 7447 7448 static int __init volume_create_alsa_mixer(void) 7449 { 7450 struct snd_card *card; 7451 struct tpacpi_alsa_data *data; 7452 struct snd_kcontrol *ctl_vol; 7453 struct snd_kcontrol *ctl_mute; 7454 int rc; 7455 7456 rc = snd_card_new(&tpacpi_pdev->dev, 7457 alsa_index, alsa_id, THIS_MODULE, 7458 sizeof(struct tpacpi_alsa_data), &card); 7459 if (rc < 0 || !card) { 7460 pr_err("Failed to create ALSA card structures: %d\n", rc); 7461 return 1; 7462 } 7463 7464 BUG_ON(!card->private_data); 7465 data = card->private_data; 7466 data->card = card; 7467 7468 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7469 sizeof(card->driver)); 7470 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7471 sizeof(card->shortname)); 7472 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7473 (thinkpad_id.ec_version_str) ? 7474 thinkpad_id.ec_version_str : "(unknown)"); 7475 snprintf(card->longname, sizeof(card->longname), 7476 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7477 (thinkpad_id.ec_version_str) ? 7478 thinkpad_id.ec_version_str : "unknown"); 7479 7480 if (volume_control_allowed) { 7481 volume_alsa_control_vol.put = volume_alsa_vol_put; 7482 volume_alsa_control_vol.access = 7483 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7484 7485 volume_alsa_control_mute.put = volume_alsa_mute_put; 7486 volume_alsa_control_mute.access = 7487 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7488 } 7489 7490 if (!tp_features.mixer_no_level_control) { 7491 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7492 rc = snd_ctl_add(card, ctl_vol); 7493 if (rc < 0) { 7494 pr_err("Failed to create ALSA volume control: %d\n", 7495 rc); 7496 goto err_exit; 7497 } 7498 data->ctl_vol_id = &ctl_vol->id; 7499 } 7500 7501 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7502 rc = snd_ctl_add(card, ctl_mute); 7503 if (rc < 0) { 7504 pr_err("Failed to create ALSA mute control: %d\n", rc); 7505 goto err_exit; 7506 } 7507 data->ctl_mute_id = &ctl_mute->id; 7508 7509 rc = snd_card_register(card); 7510 if (rc < 0) { 7511 pr_err("Failed to register ALSA card: %d\n", rc); 7512 goto err_exit; 7513 } 7514 7515 alsa_card = card; 7516 return 0; 7517 7518 err_exit: 7519 snd_card_free(card); 7520 return 1; 7521 } 7522 7523 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7524 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7525 7526 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7527 /* Whitelist volume level on all IBM by default */ 7528 { .vendor = PCI_VENDOR_ID_IBM, 7529 .bios = TPACPI_MATCH_ANY, 7530 .ec = TPACPI_MATCH_ANY, 7531 .quirks = TPACPI_VOL_Q_LEVEL }, 7532 7533 /* Lenovo models with volume control (needs confirmation) */ 7534 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7535 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7536 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7537 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7538 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7539 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7540 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7541 7542 /* Whitelist mute-only on all Lenovo by default */ 7543 { .vendor = PCI_VENDOR_ID_LENOVO, 7544 .bios = TPACPI_MATCH_ANY, 7545 .ec = TPACPI_MATCH_ANY, 7546 .quirks = TPACPI_VOL_Q_MUTEONLY } 7547 }; 7548 7549 static int __init volume_init(struct ibm_init_struct *iibm) 7550 { 7551 unsigned long quirks; 7552 int rc; 7553 7554 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7555 7556 mutex_init(&volume_mutex); 7557 7558 /* 7559 * Check for module parameter bogosity, note that we 7560 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7561 * able to detect "unspecified" 7562 */ 7563 if (volume_mode > TPACPI_VOL_MODE_MAX) 7564 return -EINVAL; 7565 7566 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7567 pr_err("UCMS step volume mode not implemented, " 7568 "please contact %s\n", TPACPI_MAIL); 7569 return 1; 7570 } 7571 7572 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7573 return -EINVAL; 7574 7575 /* 7576 * The ALSA mixer is our primary interface. 7577 * When disabled, don't install the subdriver at all 7578 */ 7579 if (!alsa_enable) { 7580 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7581 "ALSA mixer disabled by parameter, " 7582 "not loading volume subdriver...\n"); 7583 return 1; 7584 } 7585 7586 quirks = tpacpi_check_quirks(volume_quirk_table, 7587 ARRAY_SIZE(volume_quirk_table)); 7588 7589 switch (volume_capabilities) { 7590 case TPACPI_VOL_CAP_AUTO: 7591 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7592 tp_features.mixer_no_level_control = 1; 7593 else if (quirks & TPACPI_VOL_Q_LEVEL) 7594 tp_features.mixer_no_level_control = 0; 7595 else 7596 return 1; /* no mixer */ 7597 break; 7598 case TPACPI_VOL_CAP_VOLMUTE: 7599 tp_features.mixer_no_level_control = 0; 7600 break; 7601 case TPACPI_VOL_CAP_MUTEONLY: 7602 tp_features.mixer_no_level_control = 1; 7603 break; 7604 default: 7605 return 1; 7606 } 7607 7608 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7609 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7610 "using user-supplied volume_capabilities=%d\n", 7611 volume_capabilities); 7612 7613 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7614 volume_mode == TPACPI_VOL_MODE_MAX) { 7615 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7616 7617 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7618 "driver auto-selected volume_mode=%d\n", 7619 volume_mode); 7620 } else { 7621 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7622 "using user-supplied volume_mode=%d\n", 7623 volume_mode); 7624 } 7625 7626 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7627 "mute is supported, volume control is %s\n", 7628 str_supported(!tp_features.mixer_no_level_control)); 7629 7630 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7631 software_mute_active = true; 7632 } else { 7633 rc = volume_create_alsa_mixer(); 7634 if (rc) { 7635 pr_err("Could not create the ALSA mixer interface\n"); 7636 return rc; 7637 } 7638 7639 pr_info("Console audio control enabled, mode: %s\n", 7640 (volume_control_allowed) ? 7641 "override (read/write)" : 7642 "monitor (read only)"); 7643 } 7644 7645 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7646 "registering volume hotkeys as change notification\n"); 7647 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7648 | TP_ACPI_HKEY_VOLUP_MASK 7649 | TP_ACPI_HKEY_VOLDWN_MASK 7650 | TP_ACPI_HKEY_MUTE_MASK); 7651 7652 return 0; 7653 } 7654 7655 static int volume_read(struct seq_file *m) 7656 { 7657 u8 status; 7658 7659 if (volume_get_status(&status) < 0) { 7660 seq_printf(m, "level:\t\tunreadable\n"); 7661 } else { 7662 if (tp_features.mixer_no_level_control) 7663 seq_printf(m, "level:\t\tunsupported\n"); 7664 else 7665 seq_printf(m, "level:\t\t%d\n", 7666 status & TP_EC_AUDIO_LVL_MSK); 7667 7668 seq_printf(m, "mute:\t\t%s\n", 7669 onoff(status, TP_EC_AUDIO_MUTESW)); 7670 7671 if (volume_control_allowed) { 7672 seq_printf(m, "commands:\tunmute, mute\n"); 7673 if (!tp_features.mixer_no_level_control) { 7674 seq_printf(m, 7675 "commands:\tup, down\n"); 7676 seq_printf(m, 7677 "commands:\tlevel <level>" 7678 " (<level> is 0-%d)\n", 7679 TP_EC_VOLUME_MAX); 7680 } 7681 } 7682 } 7683 7684 return 0; 7685 } 7686 7687 static int volume_write(char *buf) 7688 { 7689 u8 s; 7690 u8 new_level, new_mute; 7691 int l; 7692 char *cmd; 7693 int rc; 7694 7695 /* 7696 * We do allow volume control at driver startup, so that the 7697 * user can set initial state through the volume=... parameter hack. 7698 */ 7699 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7700 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7701 tp_warned.volume_ctrl_forbidden = 1; 7702 pr_notice("Console audio control in monitor mode, " 7703 "changes are not allowed\n"); 7704 pr_notice("Use the volume_control=1 module parameter " 7705 "to enable volume control\n"); 7706 } 7707 return -EPERM; 7708 } 7709 7710 rc = volume_get_status(&s); 7711 if (rc < 0) 7712 return rc; 7713 7714 new_level = s & TP_EC_AUDIO_LVL_MSK; 7715 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7716 7717 while ((cmd = next_cmd(&buf))) { 7718 if (!tp_features.mixer_no_level_control) { 7719 if (strlencmp(cmd, "up") == 0) { 7720 if (new_mute) 7721 new_mute = 0; 7722 else if (new_level < TP_EC_VOLUME_MAX) 7723 new_level++; 7724 continue; 7725 } else if (strlencmp(cmd, "down") == 0) { 7726 if (new_mute) 7727 new_mute = 0; 7728 else if (new_level > 0) 7729 new_level--; 7730 continue; 7731 } else if (sscanf(cmd, "level %u", &l) == 1 && 7732 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7733 new_level = l; 7734 continue; 7735 } 7736 } 7737 if (strlencmp(cmd, "mute") == 0) 7738 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7739 else if (strlencmp(cmd, "unmute") == 0) 7740 new_mute = 0; 7741 else 7742 return -EINVAL; 7743 } 7744 7745 if (tp_features.mixer_no_level_control) { 7746 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7747 new_mute ? "" : "un"); 7748 rc = volume_set_mute(!!new_mute); 7749 } else { 7750 tpacpi_disclose_usertask("procfs volume", 7751 "%smute and set level to %d\n", 7752 new_mute ? "" : "un", new_level); 7753 rc = volume_set_status(new_mute | new_level); 7754 } 7755 volume_alsa_notify_change(); 7756 7757 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7758 } 7759 7760 static struct ibm_struct volume_driver_data = { 7761 .name = "volume", 7762 .read = volume_read, 7763 .write = volume_write, 7764 .exit = volume_exit, 7765 .suspend = volume_suspend, 7766 .resume = volume_resume, 7767 .shutdown = volume_shutdown, 7768 }; 7769 7770 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7771 7772 #define alsa_card NULL 7773 7774 static inline void volume_alsa_notify_change(void) 7775 { 7776 } 7777 7778 static int __init volume_init(struct ibm_init_struct *iibm) 7779 { 7780 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7781 7782 return 1; 7783 } 7784 7785 static struct ibm_struct volume_driver_data = { 7786 .name = "volume", 7787 }; 7788 7789 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7790 7791 /************************************************************************* 7792 * Fan subdriver 7793 */ 7794 7795 /* 7796 * FAN ACCESS MODES 7797 * 7798 * TPACPI_FAN_RD_ACPI_GFAN: 7799 * ACPI GFAN method: returns fan level 7800 * 7801 * see TPACPI_FAN_WR_ACPI_SFAN 7802 * EC 0x2f (HFSP) not available if GFAN exists 7803 * 7804 * TPACPI_FAN_WR_ACPI_SFAN: 7805 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7806 * 7807 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7808 * it for writing. 7809 * 7810 * TPACPI_FAN_WR_TPEC: 7811 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7812 * Supported on almost all ThinkPads 7813 * 7814 * Fan speed changes of any sort (including those caused by the 7815 * disengaged mode) are usually done slowly by the firmware as the 7816 * maximum amount of fan duty cycle change per second seems to be 7817 * limited. 7818 * 7819 * Reading is not available if GFAN exists. 7820 * Writing is not available if SFAN exists. 7821 * 7822 * Bits 7823 * 7 automatic mode engaged; 7824 * (default operation mode of the ThinkPad) 7825 * fan level is ignored in this mode. 7826 * 6 full speed mode (takes precedence over bit 7); 7827 * not available on all thinkpads. May disable 7828 * the tachometer while the fan controller ramps up 7829 * the speed (which can take up to a few *minutes*). 7830 * Speeds up fan to 100% duty-cycle, which is far above 7831 * the standard RPM levels. It is not impossible that 7832 * it could cause hardware damage. 7833 * 5-3 unused in some models. Extra bits for fan level 7834 * in others, but still useless as all values above 7835 * 7 map to the same speed as level 7 in these models. 7836 * 2-0 fan level (0..7 usually) 7837 * 0x00 = stop 7838 * 0x07 = max (set when temperatures critical) 7839 * Some ThinkPads may have other levels, see 7840 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7841 * 7842 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7843 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7844 * does so, its initial value is meaningless (0x07). 7845 * 7846 * For firmware bugs, refer to: 7847 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7848 * 7849 * ---- 7850 * 7851 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7852 * Main fan tachometer reading (in RPM) 7853 * 7854 * This register is present on all ThinkPads with a new-style EC, and 7855 * it is known not to be present on the A21m/e, and T22, as there is 7856 * something else in offset 0x84 according to the ACPI DSDT. Other 7857 * ThinkPads from this same time period (and earlier) probably lack the 7858 * tachometer as well. 7859 * 7860 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7861 * was never fixed by IBM to report the EC firmware version string 7862 * probably support the tachometer (like the early X models), so 7863 * detecting it is quite hard. We need more data to know for sure. 7864 * 7865 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7866 * might result. 7867 * 7868 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7869 * mode. 7870 * 7871 * For firmware bugs, refer to: 7872 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7873 * 7874 * ---- 7875 * 7876 * ThinkPad EC register 0x31 bit 0 (only on select models) 7877 * 7878 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7879 * show the speed of the main fan. When bit 0 of EC register 0x31 7880 * is one, the tachometer registers show the speed of the auxiliary 7881 * fan. 7882 * 7883 * Fan control seems to affect both fans, regardless of the state 7884 * of this bit. 7885 * 7886 * So far, only the firmware for the X60/X61 non-tablet versions 7887 * seem to support this (firmware TP-7M). 7888 * 7889 * TPACPI_FAN_WR_ACPI_FANS: 7890 * ThinkPad X31, X40, X41. Not available in the X60. 7891 * 7892 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7893 * high speed. ACPI DSDT seems to map these three speeds to levels 7894 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7895 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7896 * 7897 * The speeds are stored on handles 7898 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7899 * 7900 * There are three default speed sets, accessible as handles: 7901 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7902 * 7903 * ACPI DSDT switches which set is in use depending on various 7904 * factors. 7905 * 7906 * TPACPI_FAN_WR_TPEC is also available and should be used to 7907 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7908 * but the ACPI tables just mention level 7. 7909 */ 7910 7911 enum { /* Fan control constants */ 7912 fan_status_offset = 0x2f, /* EC register 0x2f */ 7913 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7914 * 0x84 must be read before 0x85 */ 7915 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7916 bit 0 selects which fan is active */ 7917 7918 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7919 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7920 7921 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7922 }; 7923 7924 enum fan_status_access_mode { 7925 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7926 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7927 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7928 }; 7929 7930 enum fan_control_access_mode { 7931 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7932 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7933 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7934 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7935 }; 7936 7937 enum fan_control_commands { 7938 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7939 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7940 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7941 * and also watchdog cmd */ 7942 }; 7943 7944 static bool fan_control_allowed; 7945 7946 static enum fan_status_access_mode fan_status_access_mode; 7947 static enum fan_control_access_mode fan_control_access_mode; 7948 static enum fan_control_commands fan_control_commands; 7949 7950 static u8 fan_control_initial_status; 7951 static u8 fan_control_desired_level; 7952 static u8 fan_control_resume_level; 7953 static int fan_watchdog_maxinterval; 7954 7955 static struct mutex fan_mutex; 7956 7957 static void fan_watchdog_fire(struct work_struct *ignored); 7958 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7959 7960 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7961 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7962 "\\FSPD", /* 600e/x, 770e, 770x */ 7963 ); /* all others */ 7964 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7965 "JFNS", /* 770x-JL */ 7966 ); /* all others */ 7967 7968 /* 7969 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7970 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7971 * be in auto mode (0x80). 7972 * 7973 * This is corrected by any write to HFSP either by the driver, or 7974 * by the firmware. 7975 * 7976 * We assume 0x07 really means auto mode while this quirk is active, 7977 * as this is far more likely than the ThinkPad being in level 7, 7978 * which is only used by the firmware during thermal emergencies. 7979 * 7980 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7981 * TP-70 (T43, R52), which are known to be buggy. 7982 */ 7983 7984 static void fan_quirk1_setup(void) 7985 { 7986 if (fan_control_initial_status == 0x07) { 7987 pr_notice("fan_init: initial fan status is unknown, " 7988 "assuming it is in auto mode\n"); 7989 tp_features.fan_ctrl_status_undef = 1; 7990 } 7991 } 7992 7993 static void fan_quirk1_handle(u8 *fan_status) 7994 { 7995 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7996 if (*fan_status != fan_control_initial_status) { 7997 /* something changed the HFSP regisnter since 7998 * driver init time, so it is not undefined 7999 * anymore */ 8000 tp_features.fan_ctrl_status_undef = 0; 8001 } else { 8002 /* Return most likely status. In fact, it 8003 * might be the only possible status */ 8004 *fan_status = TP_EC_FAN_AUTO; 8005 } 8006 } 8007 } 8008 8009 /* Select main fan on X60/X61, NOOP on others */ 8010 static bool fan_select_fan1(void) 8011 { 8012 if (tp_features.second_fan) { 8013 u8 val; 8014 8015 if (ec_read(fan_select_offset, &val) < 0) 8016 return false; 8017 val &= 0xFEU; 8018 if (ec_write(fan_select_offset, val) < 0) 8019 return false; 8020 } 8021 return true; 8022 } 8023 8024 /* Select secondary fan on X60/X61 */ 8025 static bool fan_select_fan2(void) 8026 { 8027 u8 val; 8028 8029 if (!tp_features.second_fan) 8030 return false; 8031 8032 if (ec_read(fan_select_offset, &val) < 0) 8033 return false; 8034 val |= 0x01U; 8035 if (ec_write(fan_select_offset, val) < 0) 8036 return false; 8037 8038 return true; 8039 } 8040 8041 /* 8042 * Call with fan_mutex held 8043 */ 8044 static void fan_update_desired_level(u8 status) 8045 { 8046 if ((status & 8047 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8048 if (status > 7) 8049 fan_control_desired_level = 7; 8050 else 8051 fan_control_desired_level = status; 8052 } 8053 } 8054 8055 static int fan_get_status(u8 *status) 8056 { 8057 u8 s; 8058 8059 /* TODO: 8060 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8061 8062 switch (fan_status_access_mode) { 8063 case TPACPI_FAN_RD_ACPI_GFAN: { 8064 /* 570, 600e/x, 770e, 770x */ 8065 int res; 8066 8067 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8068 return -EIO; 8069 8070 if (likely(status)) 8071 *status = res & 0x07; 8072 8073 break; 8074 } 8075 case TPACPI_FAN_RD_TPEC: 8076 /* all except 570, 600e/x, 770e, 770x */ 8077 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8078 return -EIO; 8079 8080 if (likely(status)) { 8081 *status = s; 8082 fan_quirk1_handle(status); 8083 } 8084 8085 break; 8086 8087 default: 8088 return -ENXIO; 8089 } 8090 8091 return 0; 8092 } 8093 8094 static int fan_get_status_safe(u8 *status) 8095 { 8096 int rc; 8097 u8 s; 8098 8099 if (mutex_lock_killable(&fan_mutex)) 8100 return -ERESTARTSYS; 8101 rc = fan_get_status(&s); 8102 if (!rc) 8103 fan_update_desired_level(s); 8104 mutex_unlock(&fan_mutex); 8105 8106 if (rc) 8107 return rc; 8108 if (status) 8109 *status = s; 8110 8111 return 0; 8112 } 8113 8114 static int fan_get_speed(unsigned int *speed) 8115 { 8116 u8 hi, lo; 8117 8118 switch (fan_status_access_mode) { 8119 case TPACPI_FAN_RD_TPEC: 8120 /* all except 570, 600e/x, 770e, 770x */ 8121 if (unlikely(!fan_select_fan1())) 8122 return -EIO; 8123 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8124 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8125 return -EIO; 8126 8127 if (likely(speed)) 8128 *speed = (hi << 8) | lo; 8129 8130 break; 8131 8132 default: 8133 return -ENXIO; 8134 } 8135 8136 return 0; 8137 } 8138 8139 static int fan2_get_speed(unsigned int *speed) 8140 { 8141 u8 hi, lo; 8142 bool rc; 8143 8144 switch (fan_status_access_mode) { 8145 case TPACPI_FAN_RD_TPEC: 8146 /* all except 570, 600e/x, 770e, 770x */ 8147 if (unlikely(!fan_select_fan2())) 8148 return -EIO; 8149 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8150 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8151 fan_select_fan1(); /* play it safe */ 8152 if (rc) 8153 return -EIO; 8154 8155 if (likely(speed)) 8156 *speed = (hi << 8) | lo; 8157 8158 break; 8159 8160 default: 8161 return -ENXIO; 8162 } 8163 8164 return 0; 8165 } 8166 8167 static int fan_set_level(int level) 8168 { 8169 if (!fan_control_allowed) 8170 return -EPERM; 8171 8172 switch (fan_control_access_mode) { 8173 case TPACPI_FAN_WR_ACPI_SFAN: 8174 if (level >= 0 && level <= 7) { 8175 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8176 return -EIO; 8177 } else 8178 return -EINVAL; 8179 break; 8180 8181 case TPACPI_FAN_WR_ACPI_FANS: 8182 case TPACPI_FAN_WR_TPEC: 8183 if (!(level & TP_EC_FAN_AUTO) && 8184 !(level & TP_EC_FAN_FULLSPEED) && 8185 ((level < 0) || (level > 7))) 8186 return -EINVAL; 8187 8188 /* safety net should the EC not support AUTO 8189 * or FULLSPEED mode bits and just ignore them */ 8190 if (level & TP_EC_FAN_FULLSPEED) 8191 level |= 7; /* safety min speed 7 */ 8192 else if (level & TP_EC_FAN_AUTO) 8193 level |= 4; /* safety min speed 4 */ 8194 8195 if (!acpi_ec_write(fan_status_offset, level)) 8196 return -EIO; 8197 else 8198 tp_features.fan_ctrl_status_undef = 0; 8199 break; 8200 8201 default: 8202 return -ENXIO; 8203 } 8204 8205 vdbg_printk(TPACPI_DBG_FAN, 8206 "fan control: set fan control register to 0x%02x\n", level); 8207 return 0; 8208 } 8209 8210 static int fan_set_level_safe(int level) 8211 { 8212 int rc; 8213 8214 if (!fan_control_allowed) 8215 return -EPERM; 8216 8217 if (mutex_lock_killable(&fan_mutex)) 8218 return -ERESTARTSYS; 8219 8220 if (level == TPACPI_FAN_LAST_LEVEL) 8221 level = fan_control_desired_level; 8222 8223 rc = fan_set_level(level); 8224 if (!rc) 8225 fan_update_desired_level(level); 8226 8227 mutex_unlock(&fan_mutex); 8228 return rc; 8229 } 8230 8231 static int fan_set_enable(void) 8232 { 8233 u8 s; 8234 int rc; 8235 8236 if (!fan_control_allowed) 8237 return -EPERM; 8238 8239 if (mutex_lock_killable(&fan_mutex)) 8240 return -ERESTARTSYS; 8241 8242 switch (fan_control_access_mode) { 8243 case TPACPI_FAN_WR_ACPI_FANS: 8244 case TPACPI_FAN_WR_TPEC: 8245 rc = fan_get_status(&s); 8246 if (rc < 0) 8247 break; 8248 8249 /* Don't go out of emergency fan mode */ 8250 if (s != 7) { 8251 s &= 0x07; 8252 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8253 } 8254 8255 if (!acpi_ec_write(fan_status_offset, s)) 8256 rc = -EIO; 8257 else { 8258 tp_features.fan_ctrl_status_undef = 0; 8259 rc = 0; 8260 } 8261 break; 8262 8263 case TPACPI_FAN_WR_ACPI_SFAN: 8264 rc = fan_get_status(&s); 8265 if (rc < 0) 8266 break; 8267 8268 s &= 0x07; 8269 8270 /* Set fan to at least level 4 */ 8271 s |= 4; 8272 8273 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8274 rc = -EIO; 8275 else 8276 rc = 0; 8277 break; 8278 8279 default: 8280 rc = -ENXIO; 8281 } 8282 8283 mutex_unlock(&fan_mutex); 8284 8285 if (!rc) 8286 vdbg_printk(TPACPI_DBG_FAN, 8287 "fan control: set fan control register to 0x%02x\n", 8288 s); 8289 return rc; 8290 } 8291 8292 static int fan_set_disable(void) 8293 { 8294 int rc; 8295 8296 if (!fan_control_allowed) 8297 return -EPERM; 8298 8299 if (mutex_lock_killable(&fan_mutex)) 8300 return -ERESTARTSYS; 8301 8302 rc = 0; 8303 switch (fan_control_access_mode) { 8304 case TPACPI_FAN_WR_ACPI_FANS: 8305 case TPACPI_FAN_WR_TPEC: 8306 if (!acpi_ec_write(fan_status_offset, 0x00)) 8307 rc = -EIO; 8308 else { 8309 fan_control_desired_level = 0; 8310 tp_features.fan_ctrl_status_undef = 0; 8311 } 8312 break; 8313 8314 case TPACPI_FAN_WR_ACPI_SFAN: 8315 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8316 rc = -EIO; 8317 else 8318 fan_control_desired_level = 0; 8319 break; 8320 8321 default: 8322 rc = -ENXIO; 8323 } 8324 8325 if (!rc) 8326 vdbg_printk(TPACPI_DBG_FAN, 8327 "fan control: set fan control register to 0\n"); 8328 8329 mutex_unlock(&fan_mutex); 8330 return rc; 8331 } 8332 8333 static int fan_set_speed(int speed) 8334 { 8335 int rc; 8336 8337 if (!fan_control_allowed) 8338 return -EPERM; 8339 8340 if (mutex_lock_killable(&fan_mutex)) 8341 return -ERESTARTSYS; 8342 8343 rc = 0; 8344 switch (fan_control_access_mode) { 8345 case TPACPI_FAN_WR_ACPI_FANS: 8346 if (speed >= 0 && speed <= 65535) { 8347 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8348 speed, speed, speed)) 8349 rc = -EIO; 8350 } else 8351 rc = -EINVAL; 8352 break; 8353 8354 default: 8355 rc = -ENXIO; 8356 } 8357 8358 mutex_unlock(&fan_mutex); 8359 return rc; 8360 } 8361 8362 static void fan_watchdog_reset(void) 8363 { 8364 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8365 return; 8366 8367 if (fan_watchdog_maxinterval > 0 && 8368 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8369 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8370 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8371 else 8372 cancel_delayed_work(&fan_watchdog_task); 8373 } 8374 8375 static void fan_watchdog_fire(struct work_struct *ignored) 8376 { 8377 int rc; 8378 8379 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8380 return; 8381 8382 pr_notice("fan watchdog: enabling fan\n"); 8383 rc = fan_set_enable(); 8384 if (rc < 0) { 8385 pr_err("fan watchdog: error %d while enabling fan, " 8386 "will try again later...\n", -rc); 8387 /* reschedule for later */ 8388 fan_watchdog_reset(); 8389 } 8390 } 8391 8392 /* 8393 * SYSFS fan layout: hwmon compatible (device) 8394 * 8395 * pwm*_enable: 8396 * 0: "disengaged" mode 8397 * 1: manual mode 8398 * 2: native EC "auto" mode (recommended, hardware default) 8399 * 8400 * pwm*: set speed in manual mode, ignored otherwise. 8401 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8402 * interpolation. 8403 * 8404 * fan*_input: tachometer reading, RPM 8405 * 8406 * 8407 * SYSFS fan layout: extensions 8408 * 8409 * fan_watchdog (driver): 8410 * fan watchdog interval in seconds, 0 disables (default), max 120 8411 */ 8412 8413 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8414 static ssize_t fan_pwm1_enable_show(struct device *dev, 8415 struct device_attribute *attr, 8416 char *buf) 8417 { 8418 int res, mode; 8419 u8 status; 8420 8421 res = fan_get_status_safe(&status); 8422 if (res) 8423 return res; 8424 8425 if (status & TP_EC_FAN_FULLSPEED) { 8426 mode = 0; 8427 } else if (status & TP_EC_FAN_AUTO) { 8428 mode = 2; 8429 } else 8430 mode = 1; 8431 8432 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8433 } 8434 8435 static ssize_t fan_pwm1_enable_store(struct device *dev, 8436 struct device_attribute *attr, 8437 const char *buf, size_t count) 8438 { 8439 unsigned long t; 8440 int res, level; 8441 8442 if (parse_strtoul(buf, 2, &t)) 8443 return -EINVAL; 8444 8445 tpacpi_disclose_usertask("hwmon pwm1_enable", 8446 "set fan mode to %lu\n", t); 8447 8448 switch (t) { 8449 case 0: 8450 level = TP_EC_FAN_FULLSPEED; 8451 break; 8452 case 1: 8453 level = TPACPI_FAN_LAST_LEVEL; 8454 break; 8455 case 2: 8456 level = TP_EC_FAN_AUTO; 8457 break; 8458 case 3: 8459 /* reserved for software-controlled auto mode */ 8460 return -ENOSYS; 8461 default: 8462 return -EINVAL; 8463 } 8464 8465 res = fan_set_level_safe(level); 8466 if (res == -ENXIO) 8467 return -EINVAL; 8468 else if (res < 0) 8469 return res; 8470 8471 fan_watchdog_reset(); 8472 8473 return count; 8474 } 8475 8476 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8477 fan_pwm1_enable_show, fan_pwm1_enable_store); 8478 8479 /* sysfs fan pwm1 ------------------------------------------------------ */ 8480 static ssize_t fan_pwm1_show(struct device *dev, 8481 struct device_attribute *attr, 8482 char *buf) 8483 { 8484 int res; 8485 u8 status; 8486 8487 res = fan_get_status_safe(&status); 8488 if (res) 8489 return res; 8490 8491 if ((status & 8492 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8493 status = fan_control_desired_level; 8494 8495 if (status > 7) 8496 status = 7; 8497 8498 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8499 } 8500 8501 static ssize_t fan_pwm1_store(struct device *dev, 8502 struct device_attribute *attr, 8503 const char *buf, size_t count) 8504 { 8505 unsigned long s; 8506 int rc; 8507 u8 status, newlevel; 8508 8509 if (parse_strtoul(buf, 255, &s)) 8510 return -EINVAL; 8511 8512 tpacpi_disclose_usertask("hwmon pwm1", 8513 "set fan speed to %lu\n", s); 8514 8515 /* scale down from 0-255 to 0-7 */ 8516 newlevel = (s >> 5) & 0x07; 8517 8518 if (mutex_lock_killable(&fan_mutex)) 8519 return -ERESTARTSYS; 8520 8521 rc = fan_get_status(&status); 8522 if (!rc && (status & 8523 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8524 rc = fan_set_level(newlevel); 8525 if (rc == -ENXIO) 8526 rc = -EINVAL; 8527 else if (!rc) { 8528 fan_update_desired_level(newlevel); 8529 fan_watchdog_reset(); 8530 } 8531 } 8532 8533 mutex_unlock(&fan_mutex); 8534 return (rc) ? rc : count; 8535 } 8536 8537 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8538 8539 /* sysfs fan fan1_input ------------------------------------------------ */ 8540 static ssize_t fan_fan1_input_show(struct device *dev, 8541 struct device_attribute *attr, 8542 char *buf) 8543 { 8544 int res; 8545 unsigned int speed; 8546 8547 res = fan_get_speed(&speed); 8548 if (res < 0) 8549 return res; 8550 8551 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8552 } 8553 8554 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8555 8556 /* sysfs fan fan2_input ------------------------------------------------ */ 8557 static ssize_t fan_fan2_input_show(struct device *dev, 8558 struct device_attribute *attr, 8559 char *buf) 8560 { 8561 int res; 8562 unsigned int speed; 8563 8564 res = fan2_get_speed(&speed); 8565 if (res < 0) 8566 return res; 8567 8568 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8569 } 8570 8571 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8572 8573 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8574 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 8575 char *buf) 8576 { 8577 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8578 } 8579 8580 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 8581 const char *buf, size_t count) 8582 { 8583 unsigned long t; 8584 8585 if (parse_strtoul(buf, 120, &t)) 8586 return -EINVAL; 8587 8588 if (!fan_control_allowed) 8589 return -EPERM; 8590 8591 fan_watchdog_maxinterval = t; 8592 fan_watchdog_reset(); 8593 8594 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8595 8596 return count; 8597 } 8598 8599 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 8600 fan_fan_watchdog_show, fan_fan_watchdog_store); 8601 8602 /* --------------------------------------------------------------------- */ 8603 static struct attribute *fan_attributes[] = { 8604 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8605 &dev_attr_fan1_input.attr, 8606 NULL, /* for fan2_input */ 8607 NULL 8608 }; 8609 8610 static const struct attribute_group fan_attr_group = { 8611 .attrs = fan_attributes, 8612 }; 8613 8614 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8615 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8616 8617 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 8618 { .vendor = PCI_VENDOR_ID_IBM, \ 8619 .bios = TPACPI_MATCH_ANY, \ 8620 .ec = TPID(__id1, __id2), \ 8621 .quirks = __quirks } 8622 8623 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 8624 { .vendor = PCI_VENDOR_ID_LENOVO, \ 8625 .bios = TPACPI_MATCH_ANY, \ 8626 .ec = TPID(__id1, __id2), \ 8627 .quirks = __quirks } 8628 8629 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8630 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 8631 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 8632 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 8633 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 8634 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 8635 }; 8636 8637 #undef TPACPI_FAN_QL 8638 #undef TPACPI_FAN_QI 8639 8640 static int __init fan_init(struct ibm_init_struct *iibm) 8641 { 8642 int rc; 8643 unsigned long quirks; 8644 8645 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8646 "initializing fan subdriver\n"); 8647 8648 mutex_init(&fan_mutex); 8649 fan_status_access_mode = TPACPI_FAN_NONE; 8650 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8651 fan_control_commands = 0; 8652 fan_watchdog_maxinterval = 0; 8653 tp_features.fan_ctrl_status_undef = 0; 8654 tp_features.second_fan = 0; 8655 fan_control_desired_level = 7; 8656 8657 if (tpacpi_is_ibm()) { 8658 TPACPI_ACPIHANDLE_INIT(fans); 8659 TPACPI_ACPIHANDLE_INIT(gfan); 8660 TPACPI_ACPIHANDLE_INIT(sfan); 8661 } 8662 8663 quirks = tpacpi_check_quirks(fan_quirk_table, 8664 ARRAY_SIZE(fan_quirk_table)); 8665 8666 if (gfan_handle) { 8667 /* 570, 600e/x, 770e, 770x */ 8668 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8669 } else { 8670 /* all other ThinkPads: note that even old-style 8671 * ThinkPad ECs supports the fan control register */ 8672 if (likely(acpi_ec_read(fan_status_offset, 8673 &fan_control_initial_status))) { 8674 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8675 if (quirks & TPACPI_FAN_Q1) 8676 fan_quirk1_setup(); 8677 if (quirks & TPACPI_FAN_2FAN) { 8678 tp_features.second_fan = 1; 8679 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8680 "secondary fan support enabled\n"); 8681 } 8682 } else { 8683 pr_err("ThinkPad ACPI EC access misbehaving, " 8684 "fan status and control unavailable\n"); 8685 return 1; 8686 } 8687 } 8688 8689 if (sfan_handle) { 8690 /* 570, 770x-JL */ 8691 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8692 fan_control_commands |= 8693 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8694 } else { 8695 if (!gfan_handle) { 8696 /* gfan without sfan means no fan control */ 8697 /* all other models implement TP EC 0x2f control */ 8698 8699 if (fans_handle) { 8700 /* X31, X40, X41 */ 8701 fan_control_access_mode = 8702 TPACPI_FAN_WR_ACPI_FANS; 8703 fan_control_commands |= 8704 TPACPI_FAN_CMD_SPEED | 8705 TPACPI_FAN_CMD_LEVEL | 8706 TPACPI_FAN_CMD_ENABLE; 8707 } else { 8708 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8709 fan_control_commands |= 8710 TPACPI_FAN_CMD_LEVEL | 8711 TPACPI_FAN_CMD_ENABLE; 8712 } 8713 } 8714 } 8715 8716 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8717 "fan is %s, modes %d, %d\n", 8718 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8719 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8720 fan_status_access_mode, fan_control_access_mode); 8721 8722 /* fan control master switch */ 8723 if (!fan_control_allowed) { 8724 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8725 fan_control_commands = 0; 8726 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8727 "fan control features disabled by parameter\n"); 8728 } 8729 8730 /* update fan_control_desired_level */ 8731 if (fan_status_access_mode != TPACPI_FAN_NONE) 8732 fan_get_status_safe(NULL); 8733 8734 if (fan_status_access_mode != TPACPI_FAN_NONE || 8735 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8736 if (tp_features.second_fan) { 8737 /* attach second fan tachometer */ 8738 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8739 &dev_attr_fan2_input.attr; 8740 } 8741 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8742 &fan_attr_group); 8743 if (rc < 0) 8744 return rc; 8745 8746 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8747 &driver_attr_fan_watchdog); 8748 if (rc < 0) { 8749 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8750 &fan_attr_group); 8751 return rc; 8752 } 8753 return 0; 8754 } else 8755 return 1; 8756 } 8757 8758 static void fan_exit(void) 8759 { 8760 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8761 "cancelling any pending fan watchdog tasks\n"); 8762 8763 /* FIXME: can we really do this unconditionally? */ 8764 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8765 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8766 &driver_attr_fan_watchdog); 8767 8768 cancel_delayed_work(&fan_watchdog_task); 8769 flush_workqueue(tpacpi_wq); 8770 } 8771 8772 static void fan_suspend(void) 8773 { 8774 int rc; 8775 8776 if (!fan_control_allowed) 8777 return; 8778 8779 /* Store fan status in cache */ 8780 fan_control_resume_level = 0; 8781 rc = fan_get_status_safe(&fan_control_resume_level); 8782 if (rc < 0) 8783 pr_notice("failed to read fan level for later " 8784 "restore during resume: %d\n", rc); 8785 8786 /* if it is undefined, don't attempt to restore it. 8787 * KEEP THIS LAST */ 8788 if (tp_features.fan_ctrl_status_undef) 8789 fan_control_resume_level = 0; 8790 } 8791 8792 static void fan_resume(void) 8793 { 8794 u8 current_level = 7; 8795 bool do_set = false; 8796 int rc; 8797 8798 /* DSDT *always* updates status on resume */ 8799 tp_features.fan_ctrl_status_undef = 0; 8800 8801 if (!fan_control_allowed || 8802 !fan_control_resume_level || 8803 (fan_get_status_safe(¤t_level) < 0)) 8804 return; 8805 8806 switch (fan_control_access_mode) { 8807 case TPACPI_FAN_WR_ACPI_SFAN: 8808 /* never decrease fan level */ 8809 do_set = (fan_control_resume_level > current_level); 8810 break; 8811 case TPACPI_FAN_WR_ACPI_FANS: 8812 case TPACPI_FAN_WR_TPEC: 8813 /* never decrease fan level, scale is: 8814 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8815 * 8816 * We expect the firmware to set either 7 or AUTO, but we 8817 * handle FULLSPEED out of paranoia. 8818 * 8819 * So, we can safely only restore FULLSPEED or 7, anything 8820 * else could slow the fan. Restoring AUTO is useless, at 8821 * best that's exactly what the DSDT already set (it is the 8822 * slower it uses). 8823 * 8824 * Always keep in mind that the DSDT *will* have set the 8825 * fans to what the vendor supposes is the best level. We 8826 * muck with it only to speed the fan up. 8827 */ 8828 if (fan_control_resume_level != 7 && 8829 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8830 return; 8831 else 8832 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8833 (current_level != fan_control_resume_level); 8834 break; 8835 default: 8836 return; 8837 } 8838 if (do_set) { 8839 pr_notice("restoring fan level to 0x%02x\n", 8840 fan_control_resume_level); 8841 rc = fan_set_level_safe(fan_control_resume_level); 8842 if (rc < 0) 8843 pr_notice("failed to restore fan level: %d\n", rc); 8844 } 8845 } 8846 8847 static int fan_read(struct seq_file *m) 8848 { 8849 int rc; 8850 u8 status; 8851 unsigned int speed = 0; 8852 8853 switch (fan_status_access_mode) { 8854 case TPACPI_FAN_RD_ACPI_GFAN: 8855 /* 570, 600e/x, 770e, 770x */ 8856 rc = fan_get_status_safe(&status); 8857 if (rc < 0) 8858 return rc; 8859 8860 seq_printf(m, "status:\t\t%s\n" 8861 "level:\t\t%d\n", 8862 (status != 0) ? "enabled" : "disabled", status); 8863 break; 8864 8865 case TPACPI_FAN_RD_TPEC: 8866 /* all except 570, 600e/x, 770e, 770x */ 8867 rc = fan_get_status_safe(&status); 8868 if (rc < 0) 8869 return rc; 8870 8871 seq_printf(m, "status:\t\t%s\n", 8872 (status != 0) ? "enabled" : "disabled"); 8873 8874 rc = fan_get_speed(&speed); 8875 if (rc < 0) 8876 return rc; 8877 8878 seq_printf(m, "speed:\t\t%d\n", speed); 8879 8880 if (status & TP_EC_FAN_FULLSPEED) 8881 /* Disengaged mode takes precedence */ 8882 seq_printf(m, "level:\t\tdisengaged\n"); 8883 else if (status & TP_EC_FAN_AUTO) 8884 seq_printf(m, "level:\t\tauto\n"); 8885 else 8886 seq_printf(m, "level:\t\t%d\n", status); 8887 break; 8888 8889 case TPACPI_FAN_NONE: 8890 default: 8891 seq_printf(m, "status:\t\tnot supported\n"); 8892 } 8893 8894 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8895 seq_printf(m, "commands:\tlevel <level>"); 8896 8897 switch (fan_control_access_mode) { 8898 case TPACPI_FAN_WR_ACPI_SFAN: 8899 seq_printf(m, " (<level> is 0-7)\n"); 8900 break; 8901 8902 default: 8903 seq_printf(m, " (<level> is 0-7, " 8904 "auto, disengaged, full-speed)\n"); 8905 break; 8906 } 8907 } 8908 8909 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8910 seq_printf(m, "commands:\tenable, disable\n" 8911 "commands:\twatchdog <timeout> (<timeout> " 8912 "is 0 (off), 1-120 (seconds))\n"); 8913 8914 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8915 seq_printf(m, "commands:\tspeed <speed>" 8916 " (<speed> is 0-65535)\n"); 8917 8918 return 0; 8919 } 8920 8921 static int fan_write_cmd_level(const char *cmd, int *rc) 8922 { 8923 int level; 8924 8925 if (strlencmp(cmd, "level auto") == 0) 8926 level = TP_EC_FAN_AUTO; 8927 else if ((strlencmp(cmd, "level disengaged") == 0) | 8928 (strlencmp(cmd, "level full-speed") == 0)) 8929 level = TP_EC_FAN_FULLSPEED; 8930 else if (sscanf(cmd, "level %d", &level) != 1) 8931 return 0; 8932 8933 *rc = fan_set_level_safe(level); 8934 if (*rc == -ENXIO) 8935 pr_err("level command accepted for unsupported access mode %d\n", 8936 fan_control_access_mode); 8937 else if (!*rc) 8938 tpacpi_disclose_usertask("procfs fan", 8939 "set level to %d\n", level); 8940 8941 return 1; 8942 } 8943 8944 static int fan_write_cmd_enable(const char *cmd, int *rc) 8945 { 8946 if (strlencmp(cmd, "enable") != 0) 8947 return 0; 8948 8949 *rc = fan_set_enable(); 8950 if (*rc == -ENXIO) 8951 pr_err("enable command accepted for unsupported access mode %d\n", 8952 fan_control_access_mode); 8953 else if (!*rc) 8954 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8955 8956 return 1; 8957 } 8958 8959 static int fan_write_cmd_disable(const char *cmd, int *rc) 8960 { 8961 if (strlencmp(cmd, "disable") != 0) 8962 return 0; 8963 8964 *rc = fan_set_disable(); 8965 if (*rc == -ENXIO) 8966 pr_err("disable command accepted for unsupported access mode %d\n", 8967 fan_control_access_mode); 8968 else if (!*rc) 8969 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8970 8971 return 1; 8972 } 8973 8974 static int fan_write_cmd_speed(const char *cmd, int *rc) 8975 { 8976 int speed; 8977 8978 /* TODO: 8979 * Support speed <low> <medium> <high> ? */ 8980 8981 if (sscanf(cmd, "speed %d", &speed) != 1) 8982 return 0; 8983 8984 *rc = fan_set_speed(speed); 8985 if (*rc == -ENXIO) 8986 pr_err("speed command accepted for unsupported access mode %d\n", 8987 fan_control_access_mode); 8988 else if (!*rc) 8989 tpacpi_disclose_usertask("procfs fan", 8990 "set speed to %d\n", speed); 8991 8992 return 1; 8993 } 8994 8995 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8996 { 8997 int interval; 8998 8999 if (sscanf(cmd, "watchdog %d", &interval) != 1) 9000 return 0; 9001 9002 if (interval < 0 || interval > 120) 9003 *rc = -EINVAL; 9004 else { 9005 fan_watchdog_maxinterval = interval; 9006 tpacpi_disclose_usertask("procfs fan", 9007 "set watchdog timer to %d\n", 9008 interval); 9009 } 9010 9011 return 1; 9012 } 9013 9014 static int fan_write(char *buf) 9015 { 9016 char *cmd; 9017 int rc = 0; 9018 9019 while (!rc && (cmd = next_cmd(&buf))) { 9020 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 9021 fan_write_cmd_level(cmd, &rc)) && 9022 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 9023 (fan_write_cmd_enable(cmd, &rc) || 9024 fan_write_cmd_disable(cmd, &rc) || 9025 fan_write_cmd_watchdog(cmd, &rc))) && 9026 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 9027 fan_write_cmd_speed(cmd, &rc)) 9028 ) 9029 rc = -EINVAL; 9030 else if (!rc) 9031 fan_watchdog_reset(); 9032 } 9033 9034 return rc; 9035 } 9036 9037 static struct ibm_struct fan_driver_data = { 9038 .name = "fan", 9039 .read = fan_read, 9040 .write = fan_write, 9041 .exit = fan_exit, 9042 .suspend = fan_suspend, 9043 .resume = fan_resume, 9044 }; 9045 9046 /************************************************************************* 9047 * Mute LED subdriver 9048 */ 9049 9050 9051 struct tp_led_table { 9052 acpi_string name; 9053 int on_value; 9054 int off_value; 9055 int state; 9056 }; 9057 9058 static struct tp_led_table led_tables[] = { 9059 [TPACPI_LED_MUTE] = { 9060 .name = "SSMS", 9061 .on_value = 1, 9062 .off_value = 0, 9063 }, 9064 [TPACPI_LED_MICMUTE] = { 9065 .name = "MMTS", 9066 .on_value = 2, 9067 .off_value = 0, 9068 }, 9069 }; 9070 9071 static int mute_led_on_off(struct tp_led_table *t, bool state) 9072 { 9073 acpi_handle temp; 9074 int output; 9075 9076 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9077 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9078 return -EIO; 9079 } 9080 9081 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9082 state ? t->on_value : t->off_value)) 9083 return -EIO; 9084 9085 t->state = state; 9086 return state; 9087 } 9088 9089 int tpacpi_led_set(int whichled, bool on) 9090 { 9091 struct tp_led_table *t; 9092 9093 if (whichled < 0 || whichled >= TPACPI_LED_MAX) 9094 return -EINVAL; 9095 9096 t = &led_tables[whichled]; 9097 if (t->state < 0 || t->state == on) 9098 return t->state; 9099 return mute_led_on_off(t, on); 9100 } 9101 EXPORT_SYMBOL_GPL(tpacpi_led_set); 9102 9103 static int mute_led_init(struct ibm_init_struct *iibm) 9104 { 9105 acpi_handle temp; 9106 int i; 9107 9108 for (i = 0; i < TPACPI_LED_MAX; i++) { 9109 struct tp_led_table *t = &led_tables[i]; 9110 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) 9111 mute_led_on_off(t, false); 9112 else 9113 t->state = -ENODEV; 9114 } 9115 return 0; 9116 } 9117 9118 static void mute_led_exit(void) 9119 { 9120 int i; 9121 9122 for (i = 0; i < TPACPI_LED_MAX; i++) 9123 tpacpi_led_set(i, false); 9124 } 9125 9126 static void mute_led_resume(void) 9127 { 9128 int i; 9129 9130 for (i = 0; i < TPACPI_LED_MAX; i++) { 9131 struct tp_led_table *t = &led_tables[i]; 9132 if (t->state >= 0) 9133 mute_led_on_off(t, t->state); 9134 } 9135 } 9136 9137 static struct ibm_struct mute_led_driver_data = { 9138 .name = "mute_led", 9139 .exit = mute_led_exit, 9140 .resume = mute_led_resume, 9141 }; 9142 9143 /**************************************************************************** 9144 **************************************************************************** 9145 * 9146 * Infrastructure 9147 * 9148 **************************************************************************** 9149 ****************************************************************************/ 9150 9151 /* 9152 * HKEY event callout for other subdrivers go here 9153 * (yes, it is ugly, but it is quick, safe, and gets the job done 9154 */ 9155 static void tpacpi_driver_event(const unsigned int hkey_event) 9156 { 9157 if (ibm_backlight_device) { 9158 switch (hkey_event) { 9159 case TP_HKEY_EV_BRGHT_UP: 9160 case TP_HKEY_EV_BRGHT_DOWN: 9161 tpacpi_brightness_notify_change(); 9162 } 9163 } 9164 if (alsa_card) { 9165 switch (hkey_event) { 9166 case TP_HKEY_EV_VOL_UP: 9167 case TP_HKEY_EV_VOL_DOWN: 9168 case TP_HKEY_EV_VOL_MUTE: 9169 volume_alsa_notify_change(); 9170 } 9171 } 9172 } 9173 9174 static void hotkey_driver_event(const unsigned int scancode) 9175 { 9176 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9177 } 9178 9179 /* sysfs name ---------------------------------------------------------- */ 9180 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 9181 struct device_attribute *attr, 9182 char *buf) 9183 { 9184 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 9185 } 9186 9187 static DEVICE_ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 9188 9189 /* --------------------------------------------------------------------- */ 9190 9191 /* /proc support */ 9192 static struct proc_dir_entry *proc_dir; 9193 9194 /* 9195 * Module and infrastructure proble, init and exit handling 9196 */ 9197 9198 static bool force_load; 9199 9200 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9201 static const char * __init str_supported(int is_supported) 9202 { 9203 static char text_unsupported[] __initdata = "not supported"; 9204 9205 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9206 } 9207 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9208 9209 static void ibm_exit(struct ibm_struct *ibm) 9210 { 9211 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9212 9213 list_del_init(&ibm->all_drivers); 9214 9215 if (ibm->flags.acpi_notify_installed) { 9216 dbg_printk(TPACPI_DBG_EXIT, 9217 "%s: acpi_remove_notify_handler\n", ibm->name); 9218 BUG_ON(!ibm->acpi); 9219 acpi_remove_notify_handler(*ibm->acpi->handle, 9220 ibm->acpi->type, 9221 dispatch_acpi_notify); 9222 ibm->flags.acpi_notify_installed = 0; 9223 } 9224 9225 if (ibm->flags.proc_created) { 9226 dbg_printk(TPACPI_DBG_EXIT, 9227 "%s: remove_proc_entry\n", ibm->name); 9228 remove_proc_entry(ibm->name, proc_dir); 9229 ibm->flags.proc_created = 0; 9230 } 9231 9232 if (ibm->flags.acpi_driver_registered) { 9233 dbg_printk(TPACPI_DBG_EXIT, 9234 "%s: acpi_bus_unregister_driver\n", ibm->name); 9235 BUG_ON(!ibm->acpi); 9236 acpi_bus_unregister_driver(ibm->acpi->driver); 9237 kfree(ibm->acpi->driver); 9238 ibm->acpi->driver = NULL; 9239 ibm->flags.acpi_driver_registered = 0; 9240 } 9241 9242 if (ibm->flags.init_called && ibm->exit) { 9243 ibm->exit(); 9244 ibm->flags.init_called = 0; 9245 } 9246 9247 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9248 } 9249 9250 static int __init ibm_init(struct ibm_init_struct *iibm) 9251 { 9252 int ret; 9253 struct ibm_struct *ibm = iibm->data; 9254 struct proc_dir_entry *entry; 9255 9256 BUG_ON(ibm == NULL); 9257 9258 INIT_LIST_HEAD(&ibm->all_drivers); 9259 9260 if (ibm->flags.experimental && !experimental) 9261 return 0; 9262 9263 dbg_printk(TPACPI_DBG_INIT, 9264 "probing for %s\n", ibm->name); 9265 9266 if (iibm->init) { 9267 ret = iibm->init(iibm); 9268 if (ret > 0) 9269 return 0; /* probe failed */ 9270 if (ret) 9271 return ret; 9272 9273 ibm->flags.init_called = 1; 9274 } 9275 9276 if (ibm->acpi) { 9277 if (ibm->acpi->hid) { 9278 ret = register_tpacpi_subdriver(ibm); 9279 if (ret) 9280 goto err_out; 9281 } 9282 9283 if (ibm->acpi->notify) { 9284 ret = setup_acpi_notify(ibm); 9285 if (ret == -ENODEV) { 9286 pr_notice("disabling subdriver %s\n", 9287 ibm->name); 9288 ret = 0; 9289 goto err_out; 9290 } 9291 if (ret < 0) 9292 goto err_out; 9293 } 9294 } 9295 9296 dbg_printk(TPACPI_DBG_INIT, 9297 "%s installed\n", ibm->name); 9298 9299 if (ibm->read) { 9300 umode_t mode = iibm->base_procfs_mode; 9301 9302 if (!mode) 9303 mode = S_IRUGO; 9304 if (ibm->write) 9305 mode |= S_IWUSR; 9306 entry = proc_create_data(ibm->name, mode, proc_dir, 9307 &dispatch_proc_fops, ibm); 9308 if (!entry) { 9309 pr_err("unable to create proc entry %s\n", ibm->name); 9310 ret = -ENODEV; 9311 goto err_out; 9312 } 9313 ibm->flags.proc_created = 1; 9314 } 9315 9316 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9317 9318 return 0; 9319 9320 err_out: 9321 dbg_printk(TPACPI_DBG_INIT, 9322 "%s: at error exit path with result %d\n", 9323 ibm->name, ret); 9324 9325 ibm_exit(ibm); 9326 return (ret < 0) ? ret : 0; 9327 } 9328 9329 /* Probing */ 9330 9331 static bool __pure __init tpacpi_is_fw_digit(const char c) 9332 { 9333 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 9334 } 9335 9336 static bool __pure __init tpacpi_is_valid_fw_id(const char * const s, 9337 const char t) 9338 { 9339 /* 9340 * Most models: xxyTkkWW (#.##c) 9341 * Ancient 570/600 and -SL lacks (#.##c) 9342 */ 9343 if (s && strlen(s) >= 8 && 9344 tpacpi_is_fw_digit(s[0]) && 9345 tpacpi_is_fw_digit(s[1]) && 9346 s[2] == t && 9347 (s[3] == 'T' || s[3] == 'N') && 9348 tpacpi_is_fw_digit(s[4]) && 9349 tpacpi_is_fw_digit(s[5])) 9350 return true; 9351 9352 /* New models: xxxyTkkW (#.##c); T550 and some others */ 9353 return s && strlen(s) >= 8 && 9354 tpacpi_is_fw_digit(s[0]) && 9355 tpacpi_is_fw_digit(s[1]) && 9356 tpacpi_is_fw_digit(s[2]) && 9357 s[3] == t && 9358 (s[4] == 'T' || s[4] == 'N') && 9359 tpacpi_is_fw_digit(s[5]) && 9360 tpacpi_is_fw_digit(s[6]); 9361 } 9362 9363 /* returns 0 - probe ok, or < 0 - probe error. 9364 * Probe ok doesn't mean thinkpad found. 9365 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 9366 static int __must_check __init get_thinkpad_model_data( 9367 struct thinkpad_id_data *tp) 9368 { 9369 const struct dmi_device *dev = NULL; 9370 char ec_fw_string[18]; 9371 char const *s; 9372 9373 if (!tp) 9374 return -EINVAL; 9375 9376 memset(tp, 0, sizeof(*tp)); 9377 9378 if (dmi_name_in_vendors("IBM")) 9379 tp->vendor = PCI_VENDOR_ID_IBM; 9380 else if (dmi_name_in_vendors("LENOVO")) 9381 tp->vendor = PCI_VENDOR_ID_LENOVO; 9382 else 9383 return 0; 9384 9385 s = dmi_get_system_info(DMI_BIOS_VERSION); 9386 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 9387 if (s && !tp->bios_version_str) 9388 return -ENOMEM; 9389 9390 /* Really ancient ThinkPad 240X will fail this, which is fine */ 9391 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') || 9392 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C'))) 9393 return 0; 9394 9395 tp->bios_model = tp->bios_version_str[0] 9396 | (tp->bios_version_str[1] << 8); 9397 tp->bios_release = (tp->bios_version_str[4] << 8) 9398 | tp->bios_version_str[5]; 9399 9400 /* 9401 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 9402 * X32 or newer, all Z series; Some models must have an 9403 * up-to-date BIOS or they will not be detected. 9404 * 9405 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9406 */ 9407 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 9408 if (sscanf(dev->name, 9409 "IBM ThinkPad Embedded Controller -[%17c", 9410 ec_fw_string) == 1) { 9411 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 9412 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 9413 9414 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 9415 if (!tp->ec_version_str) 9416 return -ENOMEM; 9417 9418 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 9419 tp->ec_model = ec_fw_string[0] 9420 | (ec_fw_string[1] << 8); 9421 tp->ec_release = (ec_fw_string[4] << 8) 9422 | ec_fw_string[5]; 9423 } else { 9424 pr_notice("ThinkPad firmware release %s " 9425 "doesn't match the known patterns\n", 9426 ec_fw_string); 9427 pr_notice("please report this to %s\n", 9428 TPACPI_MAIL); 9429 } 9430 break; 9431 } 9432 } 9433 9434 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 9435 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 9436 tp->model_str = kstrdup(s, GFP_KERNEL); 9437 if (!tp->model_str) 9438 return -ENOMEM; 9439 } else { 9440 s = dmi_get_system_info(DMI_BIOS_VENDOR); 9441 if (s && !(strncasecmp(s, "Lenovo", 6))) { 9442 tp->model_str = kstrdup(s, GFP_KERNEL); 9443 if (!tp->model_str) 9444 return -ENOMEM; 9445 } 9446 } 9447 9448 s = dmi_get_system_info(DMI_PRODUCT_NAME); 9449 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 9450 if (s && !tp->nummodel_str) 9451 return -ENOMEM; 9452 9453 return 0; 9454 } 9455 9456 static int __init probe_for_thinkpad(void) 9457 { 9458 int is_thinkpad; 9459 9460 if (acpi_disabled) 9461 return -ENODEV; 9462 9463 /* It would be dangerous to run the driver in this case */ 9464 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 9465 return -ENODEV; 9466 9467 /* 9468 * Non-ancient models have better DMI tagging, but very old models 9469 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 9470 */ 9471 is_thinkpad = (thinkpad_id.model_str != NULL) || 9472 (thinkpad_id.ec_model != 0) || 9473 tpacpi_is_fw_known(); 9474 9475 /* The EC handler is required */ 9476 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 9477 if (!ec_handle) { 9478 if (is_thinkpad) 9479 pr_err("Not yet supported ThinkPad detected!\n"); 9480 return -ENODEV; 9481 } 9482 9483 if (!is_thinkpad && !force_load) 9484 return -ENODEV; 9485 9486 return 0; 9487 } 9488 9489 static void __init thinkpad_acpi_init_banner(void) 9490 { 9491 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 9492 pr_info("%s\n", TPACPI_URL); 9493 9494 pr_info("ThinkPad BIOS %s, EC %s\n", 9495 (thinkpad_id.bios_version_str) ? 9496 thinkpad_id.bios_version_str : "unknown", 9497 (thinkpad_id.ec_version_str) ? 9498 thinkpad_id.ec_version_str : "unknown"); 9499 9500 BUG_ON(!thinkpad_id.vendor); 9501 9502 if (thinkpad_id.model_str) 9503 pr_info("%s %s, model %s\n", 9504 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 9505 "IBM" : ((thinkpad_id.vendor == 9506 PCI_VENDOR_ID_LENOVO) ? 9507 "Lenovo" : "Unknown vendor"), 9508 thinkpad_id.model_str, 9509 (thinkpad_id.nummodel_str) ? 9510 thinkpad_id.nummodel_str : "unknown"); 9511 } 9512 9513 /* Module init, exit, parameters */ 9514 9515 static struct ibm_init_struct ibms_init[] __initdata = { 9516 { 9517 .data = &thinkpad_acpi_driver_data, 9518 }, 9519 { 9520 .init = hotkey_init, 9521 .data = &hotkey_driver_data, 9522 }, 9523 { 9524 .init = bluetooth_init, 9525 .data = &bluetooth_driver_data, 9526 }, 9527 { 9528 .init = wan_init, 9529 .data = &wan_driver_data, 9530 }, 9531 { 9532 .init = uwb_init, 9533 .data = &uwb_driver_data, 9534 }, 9535 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 9536 { 9537 .init = video_init, 9538 .base_procfs_mode = S_IRUSR, 9539 .data = &video_driver_data, 9540 }, 9541 #endif 9542 { 9543 .init = kbdlight_init, 9544 .data = &kbdlight_driver_data, 9545 }, 9546 { 9547 .init = light_init, 9548 .data = &light_driver_data, 9549 }, 9550 { 9551 .init = cmos_init, 9552 .data = &cmos_driver_data, 9553 }, 9554 { 9555 .init = led_init, 9556 .data = &led_driver_data, 9557 }, 9558 { 9559 .init = beep_init, 9560 .data = &beep_driver_data, 9561 }, 9562 { 9563 .init = thermal_init, 9564 .data = &thermal_driver_data, 9565 }, 9566 { 9567 .init = brightness_init, 9568 .data = &brightness_driver_data, 9569 }, 9570 { 9571 .init = volume_init, 9572 .data = &volume_driver_data, 9573 }, 9574 { 9575 .init = fan_init, 9576 .data = &fan_driver_data, 9577 }, 9578 { 9579 .init = mute_led_init, 9580 .data = &mute_led_driver_data, 9581 }, 9582 }; 9583 9584 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 9585 { 9586 unsigned int i; 9587 struct ibm_struct *ibm; 9588 9589 if (!kp || !kp->name || !val) 9590 return -EINVAL; 9591 9592 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9593 ibm = ibms_init[i].data; 9594 WARN_ON(ibm == NULL); 9595 9596 if (!ibm || !ibm->name) 9597 continue; 9598 9599 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 9600 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 9601 return -ENOSPC; 9602 strcpy(ibms_init[i].param, val); 9603 strcat(ibms_init[i].param, ","); 9604 return 0; 9605 } 9606 } 9607 9608 return -EINVAL; 9609 } 9610 9611 module_param(experimental, int, 0444); 9612 MODULE_PARM_DESC(experimental, 9613 "Enables experimental features when non-zero"); 9614 9615 module_param_named(debug, dbg_level, uint, 0); 9616 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 9617 9618 module_param(force_load, bool, 0444); 9619 MODULE_PARM_DESC(force_load, 9620 "Attempts to load the driver even on a " 9621 "mis-identified ThinkPad when true"); 9622 9623 module_param_named(fan_control, fan_control_allowed, bool, 0444); 9624 MODULE_PARM_DESC(fan_control, 9625 "Enables setting fan parameters features when true"); 9626 9627 module_param_named(brightness_mode, brightness_mode, uint, 0444); 9628 MODULE_PARM_DESC(brightness_mode, 9629 "Selects brightness control strategy: " 9630 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 9631 9632 module_param(brightness_enable, uint, 0444); 9633 MODULE_PARM_DESC(brightness_enable, 9634 "Enables backlight control when 1, disables when 0"); 9635 9636 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 9637 module_param_named(volume_mode, volume_mode, uint, 0444); 9638 MODULE_PARM_DESC(volume_mode, 9639 "Selects volume control strategy: " 9640 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 9641 9642 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 9643 MODULE_PARM_DESC(volume_capabilities, 9644 "Selects the mixer capabilites: " 9645 "0=auto, 1=volume and mute, 2=mute only"); 9646 9647 module_param_named(volume_control, volume_control_allowed, bool, 0444); 9648 MODULE_PARM_DESC(volume_control, 9649 "Enables software override for the console audio " 9650 "control when true"); 9651 9652 module_param_named(software_mute, software_mute_requested, bool, 0444); 9653 MODULE_PARM_DESC(software_mute, 9654 "Request full software mute control"); 9655 9656 /* ALSA module API parameters */ 9657 module_param_named(index, alsa_index, int, 0444); 9658 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 9659 module_param_named(id, alsa_id, charp, 0444); 9660 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 9661 module_param_named(enable, alsa_enable, bool, 0444); 9662 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 9663 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 9664 9665 #define TPACPI_PARAM(feature) \ 9666 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 9667 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 9668 "at module load, see documentation") 9669 9670 TPACPI_PARAM(hotkey); 9671 TPACPI_PARAM(bluetooth); 9672 TPACPI_PARAM(video); 9673 TPACPI_PARAM(light); 9674 TPACPI_PARAM(cmos); 9675 TPACPI_PARAM(led); 9676 TPACPI_PARAM(beep); 9677 TPACPI_PARAM(brightness); 9678 TPACPI_PARAM(volume); 9679 TPACPI_PARAM(fan); 9680 9681 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 9682 module_param(dbg_wlswemul, uint, 0444); 9683 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 9684 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 9685 MODULE_PARM_DESC(wlsw_state, 9686 "Initial state of the emulated WLSW switch"); 9687 9688 module_param(dbg_bluetoothemul, uint, 0444); 9689 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 9690 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 9691 MODULE_PARM_DESC(bluetooth_state, 9692 "Initial state of the emulated bluetooth switch"); 9693 9694 module_param(dbg_wwanemul, uint, 0444); 9695 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 9696 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 9697 MODULE_PARM_DESC(wwan_state, 9698 "Initial state of the emulated WWAN switch"); 9699 9700 module_param(dbg_uwbemul, uint, 0444); 9701 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 9702 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 9703 MODULE_PARM_DESC(uwb_state, 9704 "Initial state of the emulated UWB switch"); 9705 #endif 9706 9707 static void thinkpad_acpi_module_exit(void) 9708 { 9709 struct ibm_struct *ibm, *itmp; 9710 9711 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 9712 9713 list_for_each_entry_safe_reverse(ibm, itmp, 9714 &tpacpi_all_drivers, 9715 all_drivers) { 9716 ibm_exit(ibm); 9717 } 9718 9719 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 9720 9721 if (tpacpi_inputdev) { 9722 if (tp_features.input_device_registered) 9723 input_unregister_device(tpacpi_inputdev); 9724 else 9725 input_free_device(tpacpi_inputdev); 9726 kfree(hotkey_keycode_map); 9727 } 9728 9729 if (tpacpi_hwmon) 9730 hwmon_device_unregister(tpacpi_hwmon); 9731 9732 if (tp_features.sensors_pdev_attrs_registered) 9733 device_remove_file(&tpacpi_sensors_pdev->dev, &dev_attr_name); 9734 if (tpacpi_sensors_pdev) 9735 platform_device_unregister(tpacpi_sensors_pdev); 9736 if (tpacpi_pdev) 9737 platform_device_unregister(tpacpi_pdev); 9738 9739 if (tp_features.sensors_pdrv_attrs_registered) 9740 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 9741 if (tp_features.platform_drv_attrs_registered) 9742 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 9743 9744 if (tp_features.sensors_pdrv_registered) 9745 platform_driver_unregister(&tpacpi_hwmon_pdriver); 9746 9747 if (tp_features.platform_drv_registered) 9748 platform_driver_unregister(&tpacpi_pdriver); 9749 9750 if (proc_dir) 9751 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 9752 9753 if (tpacpi_wq) 9754 destroy_workqueue(tpacpi_wq); 9755 9756 kfree(thinkpad_id.bios_version_str); 9757 kfree(thinkpad_id.ec_version_str); 9758 kfree(thinkpad_id.model_str); 9759 kfree(thinkpad_id.nummodel_str); 9760 } 9761 9762 9763 static int __init thinkpad_acpi_module_init(void) 9764 { 9765 int ret, i; 9766 9767 tpacpi_lifecycle = TPACPI_LIFE_INIT; 9768 9769 /* Driver-level probe */ 9770 9771 ret = get_thinkpad_model_data(&thinkpad_id); 9772 if (ret) { 9773 pr_err("unable to get DMI data: %d\n", ret); 9774 thinkpad_acpi_module_exit(); 9775 return ret; 9776 } 9777 ret = probe_for_thinkpad(); 9778 if (ret) { 9779 thinkpad_acpi_module_exit(); 9780 return ret; 9781 } 9782 9783 /* Driver initialization */ 9784 9785 thinkpad_acpi_init_banner(); 9786 tpacpi_check_outdated_fw(); 9787 9788 TPACPI_ACPIHANDLE_INIT(ecrd); 9789 TPACPI_ACPIHANDLE_INIT(ecwr); 9790 9791 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 9792 if (!tpacpi_wq) { 9793 thinkpad_acpi_module_exit(); 9794 return -ENOMEM; 9795 } 9796 9797 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 9798 if (!proc_dir) { 9799 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 9800 thinkpad_acpi_module_exit(); 9801 return -ENODEV; 9802 } 9803 9804 ret = platform_driver_register(&tpacpi_pdriver); 9805 if (ret) { 9806 pr_err("unable to register main platform driver\n"); 9807 thinkpad_acpi_module_exit(); 9808 return ret; 9809 } 9810 tp_features.platform_drv_registered = 1; 9811 9812 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 9813 if (ret) { 9814 pr_err("unable to register hwmon platform driver\n"); 9815 thinkpad_acpi_module_exit(); 9816 return ret; 9817 } 9818 tp_features.sensors_pdrv_registered = 1; 9819 9820 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 9821 if (!ret) { 9822 tp_features.platform_drv_attrs_registered = 1; 9823 ret = tpacpi_create_driver_attributes( 9824 &tpacpi_hwmon_pdriver.driver); 9825 } 9826 if (ret) { 9827 pr_err("unable to create sysfs driver attributes\n"); 9828 thinkpad_acpi_module_exit(); 9829 return ret; 9830 } 9831 tp_features.sensors_pdrv_attrs_registered = 1; 9832 9833 9834 /* Device initialization */ 9835 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9836 NULL, 0); 9837 if (IS_ERR(tpacpi_pdev)) { 9838 ret = PTR_ERR(tpacpi_pdev); 9839 tpacpi_pdev = NULL; 9840 pr_err("unable to register platform device\n"); 9841 thinkpad_acpi_module_exit(); 9842 return ret; 9843 } 9844 tpacpi_sensors_pdev = platform_device_register_simple( 9845 TPACPI_HWMON_DRVR_NAME, 9846 -1, NULL, 0); 9847 if (IS_ERR(tpacpi_sensors_pdev)) { 9848 ret = PTR_ERR(tpacpi_sensors_pdev); 9849 tpacpi_sensors_pdev = NULL; 9850 pr_err("unable to register hwmon platform device\n"); 9851 thinkpad_acpi_module_exit(); 9852 return ret; 9853 } 9854 ret = device_create_file(&tpacpi_sensors_pdev->dev, &dev_attr_name); 9855 if (ret) { 9856 pr_err("unable to create sysfs hwmon device attributes\n"); 9857 thinkpad_acpi_module_exit(); 9858 return ret; 9859 } 9860 tp_features.sensors_pdev_attrs_registered = 1; 9861 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9862 if (IS_ERR(tpacpi_hwmon)) { 9863 ret = PTR_ERR(tpacpi_hwmon); 9864 tpacpi_hwmon = NULL; 9865 pr_err("unable to register hwmon device\n"); 9866 thinkpad_acpi_module_exit(); 9867 return ret; 9868 } 9869 mutex_init(&tpacpi_inputdev_send_mutex); 9870 tpacpi_inputdev = input_allocate_device(); 9871 if (!tpacpi_inputdev) { 9872 thinkpad_acpi_module_exit(); 9873 return -ENOMEM; 9874 } else { 9875 /* Prepare input device, but don't register */ 9876 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9877 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9878 tpacpi_inputdev->id.bustype = BUS_HOST; 9879 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9880 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9881 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9882 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9883 } 9884 9885 /* Init subdriver dependencies */ 9886 tpacpi_detect_brightness_capabilities(); 9887 9888 /* Init subdrivers */ 9889 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9890 ret = ibm_init(&ibms_init[i]); 9891 if (ret >= 0 && *ibms_init[i].param) 9892 ret = ibms_init[i].data->write(ibms_init[i].param); 9893 if (ret < 0) { 9894 thinkpad_acpi_module_exit(); 9895 return ret; 9896 } 9897 } 9898 9899 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9900 9901 ret = input_register_device(tpacpi_inputdev); 9902 if (ret < 0) { 9903 pr_err("unable to register input device\n"); 9904 thinkpad_acpi_module_exit(); 9905 return ret; 9906 } else { 9907 tp_features.input_device_registered = 1; 9908 } 9909 9910 return 0; 9911 } 9912 9913 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9914 9915 /* 9916 * This will autoload the driver in almost every ThinkPad 9917 * in widespread use. 9918 * 9919 * Only _VERY_ old models, like the 240, 240x and 570 lack 9920 * the HKEY event interface. 9921 */ 9922 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9923 9924 /* 9925 * DMI matching for module autoloading 9926 * 9927 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9928 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9929 * 9930 * Only models listed in thinkwiki will be supported, so add yours 9931 * if it is not there yet. 9932 */ 9933 #define IBM_BIOS_MODULE_ALIAS(__type) \ 9934 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9935 9936 /* Ancient thinkpad BIOSes have to be identified by 9937 * BIOS type or model number, and there are far less 9938 * BIOS types than model numbers... */ 9939 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9940 9941 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9942 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9943 MODULE_DESCRIPTION(TPACPI_DESC); 9944 MODULE_VERSION(TPACPI_VERSION); 9945 MODULE_LICENSE("GPL"); 9946 9947 module_init(thinkpad_acpi_module_init); 9948 module_exit(thinkpad_acpi_module_exit); 9949