1 /* 2 * thinkpad_acpi.c - ThinkPad ACPI Extras 3 * 4 * 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net> 6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #define TPACPI_VERSION "0.24" 27 #define TPACPI_SYSFS_VERSION 0x020700 28 29 /* 30 * Changelog: 31 * 2007-10-20 changelog trimmed down 32 * 33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 34 * drivers/misc. 35 * 36 * 2006-11-22 0.13 new maintainer 37 * changelog now lives in git commit history, and will 38 * not be updated further in-file. 39 * 40 * 2005-03-17 0.11 support for 600e, 770x 41 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 42 * 43 * 2005-01-16 0.9 use MODULE_VERSION 44 * thanks to Henrik Brix Andersen <brix@gentoo.org> 45 * fix parameter passing on module loading 46 * thanks to Rusty Russell <rusty@rustcorp.com.au> 47 * thanks to Jim Radford <radford@blackbean.org> 48 * 2004-11-08 0.8 fix init error case, don't return from a macro 49 * thanks to Chris Wright <chrisw@osdl.org> 50 */ 51 52 #include <linux/kernel.h> 53 #include <linux/module.h> 54 #include <linux/init.h> 55 #include <linux/types.h> 56 #include <linux/string.h> 57 #include <linux/list.h> 58 #include <linux/mutex.h> 59 #include <linux/sched.h> 60 #include <linux/kthread.h> 61 #include <linux/freezer.h> 62 #include <linux/delay.h> 63 #include <linux/slab.h> 64 65 #include <linux/nvram.h> 66 #include <linux/proc_fs.h> 67 #include <linux/seq_file.h> 68 #include <linux/sysfs.h> 69 #include <linux/backlight.h> 70 #include <linux/fb.h> 71 #include <linux/platform_device.h> 72 #include <linux/hwmon.h> 73 #include <linux/hwmon-sysfs.h> 74 #include <linux/input.h> 75 #include <linux/leds.h> 76 #include <linux/rfkill.h> 77 #include <asm/uaccess.h> 78 79 #include <linux/dmi.h> 80 #include <linux/jiffies.h> 81 #include <linux/workqueue.h> 82 83 #include <sound/core.h> 84 #include <sound/control.h> 85 #include <sound/initval.h> 86 87 #include <acpi/acpi_drivers.h> 88 89 #include <linux/pci_ids.h> 90 91 92 /* ThinkPad CMOS commands */ 93 #define TP_CMOS_VOLUME_DOWN 0 94 #define TP_CMOS_VOLUME_UP 1 95 #define TP_CMOS_VOLUME_MUTE 2 96 #define TP_CMOS_BRIGHTNESS_UP 4 97 #define TP_CMOS_BRIGHTNESS_DOWN 5 98 #define TP_CMOS_THINKLIGHT_ON 12 99 #define TP_CMOS_THINKLIGHT_OFF 13 100 101 /* NVRAM Addresses */ 102 enum tp_nvram_addr { 103 TP_NVRAM_ADDR_HK2 = 0x57, 104 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 105 TP_NVRAM_ADDR_VIDEO = 0x59, 106 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 107 TP_NVRAM_ADDR_MIXER = 0x60, 108 }; 109 110 /* NVRAM bit masks */ 111 enum { 112 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 113 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 114 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 115 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 116 TP_NVRAM_MASK_THINKLIGHT = 0x10, 117 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 118 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 119 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 120 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 121 TP_NVRAM_MASK_MUTE = 0x40, 122 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 123 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 124 TP_NVRAM_POS_LEVEL_VOLUME = 0, 125 }; 126 127 /* Misc NVRAM-related */ 128 enum { 129 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 130 }; 131 132 /* ACPI HIDs */ 133 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 134 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 135 #define TPACPI_ACPI_EC_HID "PNP0C09" 136 137 /* Input IDs */ 138 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 139 #define TPACPI_HKEY_INPUT_VERSION 0x4101 140 141 /* ACPI \WGSV commands */ 142 enum { 143 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 144 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 145 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 146 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 147 }; 148 149 /* TP_ACPI_WGSV_GET_STATE bits */ 150 enum { 151 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 152 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 153 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 154 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 155 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 156 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 157 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 158 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 159 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 160 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 161 }; 162 163 /* HKEY events */ 164 enum tpacpi_hkey_event_t { 165 /* Hotkey-related */ 166 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 167 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 168 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 169 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 170 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 171 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 172 173 /* Reasons for waking up from S3/S4 */ 174 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 175 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 176 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 177 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 178 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 179 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 180 181 /* Auto-sleep after eject request */ 182 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 183 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 184 185 /* Misc bay events */ 186 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 187 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 188 or port replicator */ 189 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 190 dock or port replicator */ 191 192 /* User-interface events */ 193 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 194 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 195 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 196 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 197 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 198 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 199 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 200 201 /* Key-related user-interface events */ 202 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 203 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 204 205 /* Thermal events */ 206 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 207 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 208 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 209 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 210 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 211 212 TP_HKEY_EV_UNK_6040 = 0x6040, /* Related to AC change? 213 some sort of APM hint, 214 W520 */ 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) (pm_message_t state); 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 mode_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 u32 hotkey_tablet:1; 310 u32 light:1; 311 u32 light_status:1; 312 u32 bright_acpimode:1; 313 u32 bright_unkfw:1; 314 u32 wan:1; 315 u32 uwb:1; 316 u32 fan_ctrl_status_undef:1; 317 u32 second_fan:1; 318 u32 beep_needs_two_args:1; 319 u32 mixer_no_level_control:1; 320 u32 input_device_registered:1; 321 u32 platform_drv_registered:1; 322 u32 platform_drv_attrs_registered:1; 323 u32 sensors_pdrv_registered:1; 324 u32 sensors_pdrv_attrs_registered:1; 325 u32 sensors_pdev_attrs_registered:1; 326 u32 hotkey_poll_active:1; 327 } tp_features; 328 329 static struct { 330 u16 hotkey_mask_ff:1; 331 u16 volume_ctrl_forbidden:1; 332 } tp_warned; 333 334 struct thinkpad_id_data { 335 unsigned int vendor; /* ThinkPad vendor: 336 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 337 338 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 339 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 340 341 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 342 u16 ec_model; 343 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 344 u16 ec_release; 345 346 char *model_str; /* ThinkPad T43 */ 347 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 348 }; 349 static struct thinkpad_id_data thinkpad_id; 350 351 static enum { 352 TPACPI_LIFE_INIT = 0, 353 TPACPI_LIFE_RUNNING, 354 TPACPI_LIFE_EXITING, 355 } tpacpi_lifecycle; 356 357 static int experimental; 358 static u32 dbg_level; 359 360 static struct workqueue_struct *tpacpi_wq; 361 362 enum led_status_t { 363 TPACPI_LED_OFF = 0, 364 TPACPI_LED_ON, 365 TPACPI_LED_BLINK, 366 }; 367 368 /* Special LED class that can defer work */ 369 struct tpacpi_led_classdev { 370 struct led_classdev led_classdev; 371 struct work_struct work; 372 enum led_status_t new_state; 373 unsigned int led; 374 }; 375 376 /* brightness level capabilities */ 377 static unsigned int bright_maxlvl; /* 0 = unknown */ 378 379 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 380 static int dbg_wlswemul; 381 static int tpacpi_wlsw_emulstate; 382 static int dbg_bluetoothemul; 383 static int tpacpi_bluetooth_emulstate; 384 static int dbg_wwanemul; 385 static int tpacpi_wwan_emulstate; 386 static int dbg_uwbemul; 387 static int tpacpi_uwb_emulstate; 388 #endif 389 390 391 /************************************************************************* 392 * Debugging helpers 393 */ 394 395 #define dbg_printk(a_dbg_level, format, arg...) \ 396 do { \ 397 if (dbg_level & (a_dbg_level)) \ 398 printk(KERN_DEBUG pr_fmt("%s: " format), \ 399 __func__, ##arg); \ 400 } while (0) 401 402 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 403 #define vdbg_printk dbg_printk 404 static const char *str_supported(int is_supported); 405 #else 406 static inline const char *str_supported(int is_supported) { return ""; } 407 #define vdbg_printk(a_dbg_level, format, arg...) \ 408 no_printk(format, ##arg) 409 #endif 410 411 static void tpacpi_log_usertask(const char * const what) 412 { 413 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 414 what, task_tgid_vnr(current)); 415 } 416 417 #define tpacpi_disclose_usertask(what, format, arg...) \ 418 do { \ 419 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 420 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 421 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 422 what, task_tgid_vnr(current), ## arg); \ 423 } \ 424 } while (0) 425 426 /* 427 * Quirk handling helpers 428 * 429 * ThinkPad IDs and versions seen in the field so far 430 * are two-characters from the set [0-9A-Z], i.e. base 36. 431 * 432 * We use values well outside that range as specials. 433 */ 434 435 #define TPACPI_MATCH_ANY 0xffffU 436 #define TPACPI_MATCH_UNKNOWN 0U 437 438 /* TPID('1', 'Y') == 0x5931 */ 439 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 440 441 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 442 { .vendor = PCI_VENDOR_ID_IBM, \ 443 .bios = TPID(__id1, __id2), \ 444 .ec = TPACPI_MATCH_ANY, \ 445 .quirks = (__quirk) } 446 447 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 448 { .vendor = PCI_VENDOR_ID_LENOVO, \ 449 .bios = TPID(__id1, __id2), \ 450 .ec = TPACPI_MATCH_ANY, \ 451 .quirks = (__quirk) } 452 453 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 454 { .vendor = PCI_VENDOR_ID_LENOVO, \ 455 .bios = TPACPI_MATCH_ANY, \ 456 .ec = TPID(__id1, __id2), \ 457 .quirks = (__quirk) } 458 459 struct tpacpi_quirk { 460 unsigned int vendor; 461 u16 bios; 462 u16 ec; 463 unsigned long quirks; 464 }; 465 466 /** 467 * tpacpi_check_quirks() - search BIOS/EC version on a list 468 * @qlist: array of &struct tpacpi_quirk 469 * @qlist_size: number of elements in @qlist 470 * 471 * Iterates over a quirks list until one is found that matches the 472 * ThinkPad's vendor, BIOS and EC model. 473 * 474 * Returns 0 if nothing matches, otherwise returns the quirks field of 475 * the matching &struct tpacpi_quirk entry. 476 * 477 * The match criteria is: vendor, ec and bios much match. 478 */ 479 static unsigned long __init tpacpi_check_quirks( 480 const struct tpacpi_quirk *qlist, 481 unsigned int qlist_size) 482 { 483 while (qlist_size) { 484 if ((qlist->vendor == thinkpad_id.vendor || 485 qlist->vendor == TPACPI_MATCH_ANY) && 486 (qlist->bios == thinkpad_id.bios_model || 487 qlist->bios == TPACPI_MATCH_ANY) && 488 (qlist->ec == thinkpad_id.ec_model || 489 qlist->ec == TPACPI_MATCH_ANY)) 490 return qlist->quirks; 491 492 qlist_size--; 493 qlist++; 494 } 495 return 0; 496 } 497 498 static inline bool __pure __init tpacpi_is_lenovo(void) 499 { 500 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 501 } 502 503 static inline bool __pure __init tpacpi_is_ibm(void) 504 { 505 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 506 } 507 508 /**************************************************************************** 509 **************************************************************************** 510 * 511 * ACPI Helpers and device model 512 * 513 **************************************************************************** 514 ****************************************************************************/ 515 516 /************************************************************************* 517 * ACPI basic handles 518 */ 519 520 static acpi_handle root_handle; 521 static acpi_handle ec_handle; 522 523 #define TPACPI_HANDLE(object, parent, paths...) \ 524 static acpi_handle object##_handle; \ 525 static const acpi_handle *object##_parent __initdata = \ 526 &parent##_handle; \ 527 static char *object##_paths[] __initdata = { paths } 528 529 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 530 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 531 532 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 533 /* T4x, X31, X40 */ 534 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 535 "\\CMS", /* R40, R40e */ 536 ); /* all others */ 537 538 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 539 "^HKEY", /* R30, R31 */ 540 "HKEY", /* all others */ 541 ); /* 570 */ 542 543 /************************************************************************* 544 * ACPI helpers 545 */ 546 547 static int acpi_evalf(acpi_handle handle, 548 void *res, char *method, char *fmt, ...) 549 { 550 char *fmt0 = fmt; 551 struct acpi_object_list params; 552 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 553 struct acpi_buffer result, *resultp; 554 union acpi_object out_obj; 555 acpi_status status; 556 va_list ap; 557 char res_type; 558 int success; 559 int quiet; 560 561 if (!*fmt) { 562 pr_err("acpi_evalf() called with empty format\n"); 563 return 0; 564 } 565 566 if (*fmt == 'q') { 567 quiet = 1; 568 fmt++; 569 } else 570 quiet = 0; 571 572 res_type = *(fmt++); 573 574 params.count = 0; 575 params.pointer = &in_objs[0]; 576 577 va_start(ap, fmt); 578 while (*fmt) { 579 char c = *(fmt++); 580 switch (c) { 581 case 'd': /* int */ 582 in_objs[params.count].integer.value = va_arg(ap, int); 583 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 584 break; 585 /* add more types as needed */ 586 default: 587 pr_err("acpi_evalf() called " 588 "with invalid format character '%c'\n", c); 589 va_end(ap); 590 return 0; 591 } 592 } 593 va_end(ap); 594 595 if (res_type != 'v') { 596 result.length = sizeof(out_obj); 597 result.pointer = &out_obj; 598 resultp = &result; 599 } else 600 resultp = NULL; 601 602 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 603 604 switch (res_type) { 605 case 'd': /* int */ 606 success = (status == AE_OK && 607 out_obj.type == ACPI_TYPE_INTEGER); 608 if (success && res) 609 *(int *)res = out_obj.integer.value; 610 break; 611 case 'v': /* void */ 612 success = status == AE_OK; 613 break; 614 /* add more types as needed */ 615 default: 616 pr_err("acpi_evalf() called " 617 "with invalid format character '%c'\n", res_type); 618 return 0; 619 } 620 621 if (!success && !quiet) 622 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 623 method, fmt0, acpi_format_exception(status)); 624 625 return success; 626 } 627 628 static int acpi_ec_read(int i, u8 *p) 629 { 630 int v; 631 632 if (ecrd_handle) { 633 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 634 return 0; 635 *p = v; 636 } else { 637 if (ec_read(i, p) < 0) 638 return 0; 639 } 640 641 return 1; 642 } 643 644 static int acpi_ec_write(int i, u8 v) 645 { 646 if (ecwr_handle) { 647 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 648 return 0; 649 } else { 650 if (ec_write(i, v) < 0) 651 return 0; 652 } 653 654 return 1; 655 } 656 657 static int issue_thinkpad_cmos_command(int cmos_cmd) 658 { 659 if (!cmos_handle) 660 return -ENXIO; 661 662 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 663 return -EIO; 664 665 return 0; 666 } 667 668 /************************************************************************* 669 * ACPI device model 670 */ 671 672 #define TPACPI_ACPIHANDLE_INIT(object) \ 673 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 674 object##_paths, ARRAY_SIZE(object##_paths)) 675 676 static void __init drv_acpi_handle_init(const char *name, 677 acpi_handle *handle, const acpi_handle parent, 678 char **paths, const int num_paths) 679 { 680 int i; 681 acpi_status status; 682 683 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 684 name); 685 686 for (i = 0; i < num_paths; i++) { 687 status = acpi_get_handle(parent, paths[i], handle); 688 if (ACPI_SUCCESS(status)) { 689 dbg_printk(TPACPI_DBG_INIT, 690 "Found ACPI handle %s for %s\n", 691 paths[i], name); 692 return; 693 } 694 } 695 696 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 697 name); 698 *handle = NULL; 699 } 700 701 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 702 u32 level, void *context, void **return_value) 703 { 704 *(acpi_handle *)return_value = handle; 705 706 return AE_CTRL_TERMINATE; 707 } 708 709 static void __init tpacpi_acpi_handle_locate(const char *name, 710 const char *hid, 711 acpi_handle *handle) 712 { 713 acpi_status status; 714 acpi_handle device_found; 715 716 BUG_ON(!name || !hid || !handle); 717 vdbg_printk(TPACPI_DBG_INIT, 718 "trying to locate ACPI handle for %s, using HID %s\n", 719 name, hid); 720 721 memset(&device_found, 0, sizeof(device_found)); 722 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 723 (void *)name, &device_found); 724 725 *handle = NULL; 726 727 if (ACPI_SUCCESS(status)) { 728 *handle = device_found; 729 dbg_printk(TPACPI_DBG_INIT, 730 "Found ACPI handle for %s\n", name); 731 } else { 732 vdbg_printk(TPACPI_DBG_INIT, 733 "Could not locate an ACPI handle for %s: %s\n", 734 name, acpi_format_exception(status)); 735 } 736 } 737 738 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 739 { 740 struct ibm_struct *ibm = data; 741 742 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 743 return; 744 745 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 746 return; 747 748 ibm->acpi->notify(ibm, event); 749 } 750 751 static int __init setup_acpi_notify(struct ibm_struct *ibm) 752 { 753 acpi_status status; 754 int rc; 755 756 BUG_ON(!ibm->acpi); 757 758 if (!*ibm->acpi->handle) 759 return 0; 760 761 vdbg_printk(TPACPI_DBG_INIT, 762 "setting up ACPI notify for %s\n", ibm->name); 763 764 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 765 if (rc < 0) { 766 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 767 return -ENODEV; 768 } 769 770 ibm->acpi->device->driver_data = ibm; 771 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 772 TPACPI_ACPI_EVENT_PREFIX, 773 ibm->name); 774 775 status = acpi_install_notify_handler(*ibm->acpi->handle, 776 ibm->acpi->type, dispatch_acpi_notify, ibm); 777 if (ACPI_FAILURE(status)) { 778 if (status == AE_ALREADY_EXISTS) { 779 pr_notice("another device driver is already " 780 "handling %s events\n", ibm->name); 781 } else { 782 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 783 ibm->name, acpi_format_exception(status)); 784 } 785 return -ENODEV; 786 } 787 ibm->flags.acpi_notify_installed = 1; 788 return 0; 789 } 790 791 static int __init tpacpi_device_add(struct acpi_device *device) 792 { 793 return 0; 794 } 795 796 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 797 { 798 int rc; 799 800 dbg_printk(TPACPI_DBG_INIT, 801 "registering %s as an ACPI driver\n", ibm->name); 802 803 BUG_ON(!ibm->acpi); 804 805 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 806 if (!ibm->acpi->driver) { 807 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 808 return -ENOMEM; 809 } 810 811 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 812 ibm->acpi->driver->ids = ibm->acpi->hid; 813 814 ibm->acpi->driver->ops.add = &tpacpi_device_add; 815 816 rc = acpi_bus_register_driver(ibm->acpi->driver); 817 if (rc < 0) { 818 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 819 ibm->name, rc); 820 kfree(ibm->acpi->driver); 821 ibm->acpi->driver = NULL; 822 } else if (!rc) 823 ibm->flags.acpi_driver_registered = 1; 824 825 return rc; 826 } 827 828 829 /**************************************************************************** 830 **************************************************************************** 831 * 832 * Procfs Helpers 833 * 834 **************************************************************************** 835 ****************************************************************************/ 836 837 static int dispatch_proc_show(struct seq_file *m, void *v) 838 { 839 struct ibm_struct *ibm = m->private; 840 841 if (!ibm || !ibm->read) 842 return -EINVAL; 843 return ibm->read(m); 844 } 845 846 static int dispatch_proc_open(struct inode *inode, struct file *file) 847 { 848 return single_open(file, dispatch_proc_show, PDE(inode)->data); 849 } 850 851 static ssize_t dispatch_proc_write(struct file *file, 852 const char __user *userbuf, 853 size_t count, loff_t *pos) 854 { 855 struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data; 856 char *kernbuf; 857 int ret; 858 859 if (!ibm || !ibm->write) 860 return -EINVAL; 861 if (count > PAGE_SIZE - 2) 862 return -EINVAL; 863 864 kernbuf = kmalloc(count + 2, GFP_KERNEL); 865 if (!kernbuf) 866 return -ENOMEM; 867 868 if (copy_from_user(kernbuf, userbuf, count)) { 869 kfree(kernbuf); 870 return -EFAULT; 871 } 872 873 kernbuf[count] = 0; 874 strcat(kernbuf, ","); 875 ret = ibm->write(kernbuf); 876 if (ret == 0) 877 ret = count; 878 879 kfree(kernbuf); 880 881 return ret; 882 } 883 884 static const struct file_operations dispatch_proc_fops = { 885 .owner = THIS_MODULE, 886 .open = dispatch_proc_open, 887 .read = seq_read, 888 .llseek = seq_lseek, 889 .release = single_release, 890 .write = dispatch_proc_write, 891 }; 892 893 static char *next_cmd(char **cmds) 894 { 895 char *start = *cmds; 896 char *end; 897 898 while ((end = strchr(start, ',')) && end == start) 899 start = end + 1; 900 901 if (!end) 902 return NULL; 903 904 *end = 0; 905 *cmds = end + 1; 906 return start; 907 } 908 909 910 /**************************************************************************** 911 **************************************************************************** 912 * 913 * Device model: input, hwmon and platform 914 * 915 **************************************************************************** 916 ****************************************************************************/ 917 918 static struct platform_device *tpacpi_pdev; 919 static struct platform_device *tpacpi_sensors_pdev; 920 static struct device *tpacpi_hwmon; 921 static struct input_dev *tpacpi_inputdev; 922 static struct mutex tpacpi_inputdev_send_mutex; 923 static LIST_HEAD(tpacpi_all_drivers); 924 925 static int tpacpi_suspend_handler(struct platform_device *pdev, 926 pm_message_t state) 927 { 928 struct ibm_struct *ibm, *itmp; 929 930 list_for_each_entry_safe(ibm, itmp, 931 &tpacpi_all_drivers, 932 all_drivers) { 933 if (ibm->suspend) 934 (ibm->suspend)(state); 935 } 936 937 return 0; 938 } 939 940 static int tpacpi_resume_handler(struct platform_device *pdev) 941 { 942 struct ibm_struct *ibm, *itmp; 943 944 list_for_each_entry_safe(ibm, itmp, 945 &tpacpi_all_drivers, 946 all_drivers) { 947 if (ibm->resume) 948 (ibm->resume)(); 949 } 950 951 return 0; 952 } 953 954 static void tpacpi_shutdown_handler(struct platform_device *pdev) 955 { 956 struct ibm_struct *ibm, *itmp; 957 958 list_for_each_entry_safe(ibm, itmp, 959 &tpacpi_all_drivers, 960 all_drivers) { 961 if (ibm->shutdown) 962 (ibm->shutdown)(); 963 } 964 } 965 966 static struct platform_driver tpacpi_pdriver = { 967 .driver = { 968 .name = TPACPI_DRVR_NAME, 969 .owner = THIS_MODULE, 970 }, 971 .suspend = tpacpi_suspend_handler, 972 .resume = tpacpi_resume_handler, 973 .shutdown = tpacpi_shutdown_handler, 974 }; 975 976 static struct platform_driver tpacpi_hwmon_pdriver = { 977 .driver = { 978 .name = TPACPI_HWMON_DRVR_NAME, 979 .owner = THIS_MODULE, 980 }, 981 }; 982 983 /************************************************************************* 984 * sysfs support helpers 985 */ 986 987 struct attribute_set { 988 unsigned int members, max_members; 989 struct attribute_group group; 990 }; 991 992 struct attribute_set_obj { 993 struct attribute_set s; 994 struct attribute *a; 995 } __attribute__((packed)); 996 997 static struct attribute_set *create_attr_set(unsigned int max_members, 998 const char *name) 999 { 1000 struct attribute_set_obj *sobj; 1001 1002 if (max_members == 0) 1003 return NULL; 1004 1005 /* Allocates space for implicit NULL at the end too */ 1006 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1007 max_members * sizeof(struct attribute *), 1008 GFP_KERNEL); 1009 if (!sobj) 1010 return NULL; 1011 sobj->s.max_members = max_members; 1012 sobj->s.group.attrs = &sobj->a; 1013 sobj->s.group.name = name; 1014 1015 return &sobj->s; 1016 } 1017 1018 #define destroy_attr_set(_set) \ 1019 kfree(_set); 1020 1021 /* not multi-threaded safe, use it in a single thread per set */ 1022 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1023 { 1024 if (!s || !attr) 1025 return -EINVAL; 1026 1027 if (s->members >= s->max_members) 1028 return -ENOMEM; 1029 1030 s->group.attrs[s->members] = attr; 1031 s->members++; 1032 1033 return 0; 1034 } 1035 1036 static int add_many_to_attr_set(struct attribute_set *s, 1037 struct attribute **attr, 1038 unsigned int count) 1039 { 1040 int i, res; 1041 1042 for (i = 0; i < count; i++) { 1043 res = add_to_attr_set(s, attr[i]); 1044 if (res) 1045 return res; 1046 } 1047 1048 return 0; 1049 } 1050 1051 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1052 { 1053 sysfs_remove_group(kobj, &s->group); 1054 destroy_attr_set(s); 1055 } 1056 1057 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1058 sysfs_create_group(_kobj, &_attr_set->group) 1059 1060 static int parse_strtoul(const char *buf, 1061 unsigned long max, unsigned long *value) 1062 { 1063 char *endp; 1064 1065 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1066 endp = skip_spaces(endp); 1067 if (*endp || *value > max) 1068 return -EINVAL; 1069 1070 return 0; 1071 } 1072 1073 static void tpacpi_disable_brightness_delay(void) 1074 { 1075 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1076 pr_notice("ACPI backlight control delay disabled\n"); 1077 } 1078 1079 static void printk_deprecated_attribute(const char * const what, 1080 const char * const details) 1081 { 1082 tpacpi_log_usertask("deprecated sysfs attribute"); 1083 pr_warn("WARNING: sysfs attribute %s is deprecated and " 1084 "will be removed. %s\n", 1085 what, details); 1086 } 1087 1088 /************************************************************************* 1089 * rfkill and radio control support helpers 1090 */ 1091 1092 /* 1093 * ThinkPad-ACPI firmware handling model: 1094 * 1095 * WLSW (master wireless switch) is event-driven, and is common to all 1096 * firmware-controlled radios. It cannot be controlled, just monitored, 1097 * as expected. It overrides all radio state in firmware 1098 * 1099 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1100 * (TODO: verify how WLSW interacts with the returned radio state). 1101 * 1102 * The only time there are shadow radio state changes, is when 1103 * masked-off hotkeys are used. 1104 */ 1105 1106 /* 1107 * Internal driver API for radio state: 1108 * 1109 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1110 * bool: true means radio blocked (off) 1111 */ 1112 enum tpacpi_rfkill_state { 1113 TPACPI_RFK_RADIO_OFF = 0, 1114 TPACPI_RFK_RADIO_ON 1115 }; 1116 1117 /* rfkill switches */ 1118 enum tpacpi_rfk_id { 1119 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1120 TPACPI_RFK_WWAN_SW_ID, 1121 TPACPI_RFK_UWB_SW_ID, 1122 TPACPI_RFK_SW_MAX 1123 }; 1124 1125 static const char *tpacpi_rfkill_names[] = { 1126 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1127 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1128 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1129 [TPACPI_RFK_SW_MAX] = NULL 1130 }; 1131 1132 /* ThinkPad-ACPI rfkill subdriver */ 1133 struct tpacpi_rfk { 1134 struct rfkill *rfkill; 1135 enum tpacpi_rfk_id id; 1136 const struct tpacpi_rfk_ops *ops; 1137 }; 1138 1139 struct tpacpi_rfk_ops { 1140 /* firmware interface */ 1141 int (*get_status)(void); 1142 int (*set_status)(const enum tpacpi_rfkill_state); 1143 }; 1144 1145 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1146 1147 /* Query FW and update rfkill sw state for a given rfkill switch */ 1148 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1149 { 1150 int status; 1151 1152 if (!tp_rfk) 1153 return -ENODEV; 1154 1155 status = (tp_rfk->ops->get_status)(); 1156 if (status < 0) 1157 return status; 1158 1159 rfkill_set_sw_state(tp_rfk->rfkill, 1160 (status == TPACPI_RFK_RADIO_OFF)); 1161 1162 return status; 1163 } 1164 1165 /* Query FW and update rfkill sw state for all rfkill switches */ 1166 static void tpacpi_rfk_update_swstate_all(void) 1167 { 1168 unsigned int i; 1169 1170 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1171 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1172 } 1173 1174 /* 1175 * Sync the HW-blocking state of all rfkill switches, 1176 * do notice it causes the rfkill core to schedule uevents 1177 */ 1178 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1179 { 1180 unsigned int i; 1181 struct tpacpi_rfk *tp_rfk; 1182 1183 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1184 tp_rfk = tpacpi_rfkill_switches[i]; 1185 if (tp_rfk) { 1186 if (rfkill_set_hw_state(tp_rfk->rfkill, 1187 blocked)) { 1188 /* ignore -- we track sw block */ 1189 } 1190 } 1191 } 1192 } 1193 1194 /* Call to get the WLSW state from the firmware */ 1195 static int hotkey_get_wlsw(void); 1196 1197 /* Call to query WLSW state and update all rfkill switches */ 1198 static bool tpacpi_rfk_check_hwblock_state(void) 1199 { 1200 int res = hotkey_get_wlsw(); 1201 int hw_blocked; 1202 1203 /* When unknown or unsupported, we have to assume it is unblocked */ 1204 if (res < 0) 1205 return false; 1206 1207 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1208 tpacpi_rfk_update_hwblock_state(hw_blocked); 1209 1210 return hw_blocked; 1211 } 1212 1213 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1214 { 1215 struct tpacpi_rfk *tp_rfk = data; 1216 int res; 1217 1218 dbg_printk(TPACPI_DBG_RFKILL, 1219 "request to change radio state to %s\n", 1220 blocked ? "blocked" : "unblocked"); 1221 1222 /* try to set radio state */ 1223 res = (tp_rfk->ops->set_status)(blocked ? 1224 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1225 1226 /* and update the rfkill core with whatever the FW really did */ 1227 tpacpi_rfk_update_swstate(tp_rfk); 1228 1229 return (res < 0) ? res : 0; 1230 } 1231 1232 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1233 .set_block = tpacpi_rfk_hook_set_block, 1234 }; 1235 1236 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1237 const struct tpacpi_rfk_ops *tp_rfkops, 1238 const enum rfkill_type rfktype, 1239 const char *name, 1240 const bool set_default) 1241 { 1242 struct tpacpi_rfk *atp_rfk; 1243 int res; 1244 bool sw_state = false; 1245 bool hw_state; 1246 int sw_status; 1247 1248 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1249 1250 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1251 if (atp_rfk) 1252 atp_rfk->rfkill = rfkill_alloc(name, 1253 &tpacpi_pdev->dev, 1254 rfktype, 1255 &tpacpi_rfk_rfkill_ops, 1256 atp_rfk); 1257 if (!atp_rfk || !atp_rfk->rfkill) { 1258 pr_err("failed to allocate memory for rfkill class\n"); 1259 kfree(atp_rfk); 1260 return -ENOMEM; 1261 } 1262 1263 atp_rfk->id = id; 1264 atp_rfk->ops = tp_rfkops; 1265 1266 sw_status = (tp_rfkops->get_status)(); 1267 if (sw_status < 0) { 1268 pr_err("failed to read initial state for %s, error %d\n", 1269 name, sw_status); 1270 } else { 1271 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1272 if (set_default) { 1273 /* try to keep the initial state, since we ask the 1274 * firmware to preserve it across S5 in NVRAM */ 1275 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1276 } 1277 } 1278 hw_state = tpacpi_rfk_check_hwblock_state(); 1279 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1280 1281 res = rfkill_register(atp_rfk->rfkill); 1282 if (res < 0) { 1283 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1284 rfkill_destroy(atp_rfk->rfkill); 1285 kfree(atp_rfk); 1286 return res; 1287 } 1288 1289 tpacpi_rfkill_switches[id] = atp_rfk; 1290 1291 pr_info("rfkill switch %s: radio is %sblocked\n", 1292 name, (sw_state || hw_state) ? "" : "un"); 1293 return 0; 1294 } 1295 1296 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1297 { 1298 struct tpacpi_rfk *tp_rfk; 1299 1300 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1301 1302 tp_rfk = tpacpi_rfkill_switches[id]; 1303 if (tp_rfk) { 1304 rfkill_unregister(tp_rfk->rfkill); 1305 rfkill_destroy(tp_rfk->rfkill); 1306 tpacpi_rfkill_switches[id] = NULL; 1307 kfree(tp_rfk); 1308 } 1309 } 1310 1311 static void printk_deprecated_rfkill_attribute(const char * const what) 1312 { 1313 printk_deprecated_attribute(what, 1314 "Please switch to generic rfkill before year 2010"); 1315 } 1316 1317 /* sysfs <radio> enable ------------------------------------------------ */ 1318 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1319 struct device_attribute *attr, 1320 char *buf) 1321 { 1322 int status; 1323 1324 printk_deprecated_rfkill_attribute(attr->attr.name); 1325 1326 /* This is in the ABI... */ 1327 if (tpacpi_rfk_check_hwblock_state()) { 1328 status = TPACPI_RFK_RADIO_OFF; 1329 } else { 1330 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1331 if (status < 0) 1332 return status; 1333 } 1334 1335 return snprintf(buf, PAGE_SIZE, "%d\n", 1336 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1337 } 1338 1339 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1340 struct device_attribute *attr, 1341 const char *buf, size_t count) 1342 { 1343 unsigned long t; 1344 int res; 1345 1346 printk_deprecated_rfkill_attribute(attr->attr.name); 1347 1348 if (parse_strtoul(buf, 1, &t)) 1349 return -EINVAL; 1350 1351 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1352 1353 /* This is in the ABI... */ 1354 if (tpacpi_rfk_check_hwblock_state() && !!t) 1355 return -EPERM; 1356 1357 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1358 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1359 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1360 1361 return (res < 0) ? res : count; 1362 } 1363 1364 /* procfs -------------------------------------------------------------- */ 1365 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1366 { 1367 if (id >= TPACPI_RFK_SW_MAX) 1368 seq_printf(m, "status:\t\tnot supported\n"); 1369 else { 1370 int status; 1371 1372 /* This is in the ABI... */ 1373 if (tpacpi_rfk_check_hwblock_state()) { 1374 status = TPACPI_RFK_RADIO_OFF; 1375 } else { 1376 status = tpacpi_rfk_update_swstate( 1377 tpacpi_rfkill_switches[id]); 1378 if (status < 0) 1379 return status; 1380 } 1381 1382 seq_printf(m, "status:\t\t%s\n", 1383 (status == TPACPI_RFK_RADIO_ON) ? 1384 "enabled" : "disabled"); 1385 seq_printf(m, "commands:\tenable, disable\n"); 1386 } 1387 1388 return 0; 1389 } 1390 1391 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1392 { 1393 char *cmd; 1394 int status = -1; 1395 int res = 0; 1396 1397 if (id >= TPACPI_RFK_SW_MAX) 1398 return -ENODEV; 1399 1400 while ((cmd = next_cmd(&buf))) { 1401 if (strlencmp(cmd, "enable") == 0) 1402 status = TPACPI_RFK_RADIO_ON; 1403 else if (strlencmp(cmd, "disable") == 0) 1404 status = TPACPI_RFK_RADIO_OFF; 1405 else 1406 return -EINVAL; 1407 } 1408 1409 if (status != -1) { 1410 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1411 (status == TPACPI_RFK_RADIO_ON) ? 1412 "enable" : "disable", 1413 tpacpi_rfkill_names[id]); 1414 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1415 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1416 } 1417 1418 return res; 1419 } 1420 1421 /************************************************************************* 1422 * thinkpad-acpi driver attributes 1423 */ 1424 1425 /* interface_version --------------------------------------------------- */ 1426 static ssize_t tpacpi_driver_interface_version_show( 1427 struct device_driver *drv, 1428 char *buf) 1429 { 1430 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1431 } 1432 1433 static DRIVER_ATTR(interface_version, S_IRUGO, 1434 tpacpi_driver_interface_version_show, NULL); 1435 1436 /* debug_level --------------------------------------------------------- */ 1437 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1438 char *buf) 1439 { 1440 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1441 } 1442 1443 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1444 const char *buf, size_t count) 1445 { 1446 unsigned long t; 1447 1448 if (parse_strtoul(buf, 0xffff, &t)) 1449 return -EINVAL; 1450 1451 dbg_level = t; 1452 1453 return count; 1454 } 1455 1456 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1457 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1458 1459 /* version ------------------------------------------------------------- */ 1460 static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1461 char *buf) 1462 { 1463 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1464 TPACPI_DESC, TPACPI_VERSION); 1465 } 1466 1467 static DRIVER_ATTR(version, S_IRUGO, 1468 tpacpi_driver_version_show, NULL); 1469 1470 /* --------------------------------------------------------------------- */ 1471 1472 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1473 1474 /* wlsw_emulstate ------------------------------------------------------ */ 1475 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1476 char *buf) 1477 { 1478 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1479 } 1480 1481 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1482 const char *buf, size_t count) 1483 { 1484 unsigned long t; 1485 1486 if (parse_strtoul(buf, 1, &t)) 1487 return -EINVAL; 1488 1489 if (tpacpi_wlsw_emulstate != !!t) { 1490 tpacpi_wlsw_emulstate = !!t; 1491 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1492 } 1493 1494 return count; 1495 } 1496 1497 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1498 tpacpi_driver_wlsw_emulstate_show, 1499 tpacpi_driver_wlsw_emulstate_store); 1500 1501 /* bluetooth_emulstate ------------------------------------------------- */ 1502 static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1503 struct device_driver *drv, 1504 char *buf) 1505 { 1506 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1507 } 1508 1509 static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1510 struct device_driver *drv, 1511 const char *buf, size_t count) 1512 { 1513 unsigned long t; 1514 1515 if (parse_strtoul(buf, 1, &t)) 1516 return -EINVAL; 1517 1518 tpacpi_bluetooth_emulstate = !!t; 1519 1520 return count; 1521 } 1522 1523 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1524 tpacpi_driver_bluetooth_emulstate_show, 1525 tpacpi_driver_bluetooth_emulstate_store); 1526 1527 /* wwan_emulstate ------------------------------------------------- */ 1528 static ssize_t tpacpi_driver_wwan_emulstate_show( 1529 struct device_driver *drv, 1530 char *buf) 1531 { 1532 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1533 } 1534 1535 static ssize_t tpacpi_driver_wwan_emulstate_store( 1536 struct device_driver *drv, 1537 const char *buf, size_t count) 1538 { 1539 unsigned long t; 1540 1541 if (parse_strtoul(buf, 1, &t)) 1542 return -EINVAL; 1543 1544 tpacpi_wwan_emulstate = !!t; 1545 1546 return count; 1547 } 1548 1549 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1550 tpacpi_driver_wwan_emulstate_show, 1551 tpacpi_driver_wwan_emulstate_store); 1552 1553 /* uwb_emulstate ------------------------------------------------- */ 1554 static ssize_t tpacpi_driver_uwb_emulstate_show( 1555 struct device_driver *drv, 1556 char *buf) 1557 { 1558 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1559 } 1560 1561 static ssize_t tpacpi_driver_uwb_emulstate_store( 1562 struct device_driver *drv, 1563 const char *buf, size_t count) 1564 { 1565 unsigned long t; 1566 1567 if (parse_strtoul(buf, 1, &t)) 1568 return -EINVAL; 1569 1570 tpacpi_uwb_emulstate = !!t; 1571 1572 return count; 1573 } 1574 1575 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1576 tpacpi_driver_uwb_emulstate_show, 1577 tpacpi_driver_uwb_emulstate_store); 1578 #endif 1579 1580 /* --------------------------------------------------------------------- */ 1581 1582 static struct driver_attribute *tpacpi_driver_attributes[] = { 1583 &driver_attr_debug_level, &driver_attr_version, 1584 &driver_attr_interface_version, 1585 }; 1586 1587 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1588 { 1589 int i, res; 1590 1591 i = 0; 1592 res = 0; 1593 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1594 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1595 i++; 1596 } 1597 1598 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1599 if (!res && dbg_wlswemul) 1600 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1601 if (!res && dbg_bluetoothemul) 1602 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1603 if (!res && dbg_wwanemul) 1604 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1605 if (!res && dbg_uwbemul) 1606 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1607 #endif 1608 1609 return res; 1610 } 1611 1612 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1613 { 1614 int i; 1615 1616 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1617 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1618 1619 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1620 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1621 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1622 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1623 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1624 #endif 1625 } 1626 1627 /************************************************************************* 1628 * Firmware Data 1629 */ 1630 1631 /* 1632 * Table of recommended minimum BIOS versions 1633 * 1634 * Reasons for listing: 1635 * 1. Stable BIOS, listed because the unknown amount of 1636 * bugs and bad ACPI behaviour on older versions 1637 * 1638 * 2. BIOS or EC fw with known bugs that trigger on Linux 1639 * 1640 * 3. BIOS with known reduced functionality in older versions 1641 * 1642 * We recommend the latest BIOS and EC version. 1643 * We only support the latest BIOS and EC fw version as a rule. 1644 * 1645 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1646 * Information from users in ThinkWiki 1647 * 1648 * WARNING: we use this table also to detect that the machine is 1649 * a ThinkPad in some cases, so don't remove entries lightly. 1650 */ 1651 1652 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1653 { .vendor = (__v), \ 1654 .bios = TPID(__id1, __id2), \ 1655 .ec = TPACPI_MATCH_ANY, \ 1656 .quirks = TPACPI_MATCH_ANY << 16 \ 1657 | (__bv1) << 8 | (__bv2) } 1658 1659 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1660 __eid, __ev1, __ev2) \ 1661 { .vendor = (__v), \ 1662 .bios = TPID(__bid1, __bid2), \ 1663 .ec = __eid, \ 1664 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1665 | (__bv1) << 8 | (__bv2) } 1666 1667 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1668 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1669 1670 /* Outdated IBM BIOSes often lack the EC id string */ 1671 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1672 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1673 __bv1, __bv2, TPID(__id1, __id2), \ 1674 __ev1, __ev2), \ 1675 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1676 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1677 __ev1, __ev2) 1678 1679 /* Outdated IBM BIOSes often lack the EC id string */ 1680 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1681 __eid1, __eid2, __ev1, __ev2) \ 1682 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1683 __bv1, __bv2, TPID(__eid1, __eid2), \ 1684 __ev1, __ev2), \ 1685 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1686 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1687 __ev1, __ev2) 1688 1689 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1690 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1691 1692 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1693 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1694 __bv1, __bv2, TPID(__id1, __id2), \ 1695 __ev1, __ev2) 1696 1697 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1698 __eid1, __eid2, __ev1, __ev2) \ 1699 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1700 __bv1, __bv2, TPID(__eid1, __eid2), \ 1701 __ev1, __ev2) 1702 1703 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1704 /* Numeric models ------------------ */ 1705 /* FW MODEL BIOS VERS */ 1706 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1707 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1708 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1709 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1710 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1711 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1712 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1713 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1714 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1715 1716 /* A-series ------------------------- */ 1717 /* FW MODEL BIOS VERS EC VERS */ 1718 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1719 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1720 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1721 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1722 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1723 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1724 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1725 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1726 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1727 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1728 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1729 1730 /* G-series ------------------------- */ 1731 /* FW MODEL BIOS VERS */ 1732 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1733 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1734 1735 /* R-series, T-series --------------- */ 1736 /* FW MODEL BIOS VERS EC VERS */ 1737 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1738 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1739 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1740 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1741 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1742 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1743 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1744 T40/p, T41/p, T42/p (1) */ 1745 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1746 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1747 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1748 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1749 1750 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1751 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1752 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1753 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1754 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1755 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1756 1757 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1758 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1759 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1760 1761 /* BIOS FW BIOS VERS EC FW EC VERS */ 1762 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1763 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1764 1765 /* X-series ------------------------- */ 1766 /* FW MODEL BIOS VERS EC VERS */ 1767 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1768 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1769 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1770 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1771 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1772 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1773 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1774 1775 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1776 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1777 1778 /* (0) - older versions lack DMI EC fw string and functionality */ 1779 /* (1) - older versions known to lack functionality */ 1780 }; 1781 1782 #undef TPV_QL1 1783 #undef TPV_QL0 1784 #undef TPV_QI2 1785 #undef TPV_QI1 1786 #undef TPV_QI0 1787 #undef TPV_Q_X 1788 #undef TPV_Q 1789 1790 static void __init tpacpi_check_outdated_fw(void) 1791 { 1792 unsigned long fwvers; 1793 u16 ec_version, bios_version; 1794 1795 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1796 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1797 1798 if (!fwvers) 1799 return; 1800 1801 bios_version = fwvers & 0xffffU; 1802 ec_version = (fwvers >> 16) & 0xffffU; 1803 1804 /* note that unknown versions are set to 0x0000 and we use that */ 1805 if ((bios_version > thinkpad_id.bios_release) || 1806 (ec_version > thinkpad_id.ec_release && 1807 ec_version != TPACPI_MATCH_ANY)) { 1808 /* 1809 * The changelogs would let us track down the exact 1810 * reason, but it is just too much of a pain to track 1811 * it. We only list BIOSes that are either really 1812 * broken, or really stable to begin with, so it is 1813 * best if the user upgrades the firmware anyway. 1814 */ 1815 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1816 pr_warn("WARNING: This firmware may be missing critical bug " 1817 "fixes and/or important features\n"); 1818 } 1819 } 1820 1821 static bool __init tpacpi_is_fw_known(void) 1822 { 1823 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1824 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1825 } 1826 1827 /**************************************************************************** 1828 **************************************************************************** 1829 * 1830 * Subdrivers 1831 * 1832 **************************************************************************** 1833 ****************************************************************************/ 1834 1835 /************************************************************************* 1836 * thinkpad-acpi metadata subdriver 1837 */ 1838 1839 static int thinkpad_acpi_driver_read(struct seq_file *m) 1840 { 1841 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1842 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1843 return 0; 1844 } 1845 1846 static struct ibm_struct thinkpad_acpi_driver_data = { 1847 .name = "driver", 1848 .read = thinkpad_acpi_driver_read, 1849 }; 1850 1851 /************************************************************************* 1852 * Hotkey subdriver 1853 */ 1854 1855 /* 1856 * ThinkPad firmware event model 1857 * 1858 * The ThinkPad firmware has two main event interfaces: normal ACPI 1859 * notifications (which follow the ACPI standard), and a private event 1860 * interface. 1861 * 1862 * The private event interface also issues events for the hotkeys. As 1863 * the driver gained features, the event handling code ended up being 1864 * built around the hotkey subdriver. This will need to be refactored 1865 * to a more formal event API eventually. 1866 * 1867 * Some "hotkeys" are actually supposed to be used as event reports, 1868 * such as "brightness has changed", "volume has changed", depending on 1869 * the ThinkPad model and how the firmware is operating. 1870 * 1871 * Unlike other classes, hotkey-class events have mask/unmask control on 1872 * non-ancient firmware. However, how it behaves changes a lot with the 1873 * firmware model and version. 1874 */ 1875 1876 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1877 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1878 TP_ACPI_HOTKEYSCAN_FNF2, 1879 TP_ACPI_HOTKEYSCAN_FNF3, 1880 TP_ACPI_HOTKEYSCAN_FNF4, 1881 TP_ACPI_HOTKEYSCAN_FNF5, 1882 TP_ACPI_HOTKEYSCAN_FNF6, 1883 TP_ACPI_HOTKEYSCAN_FNF7, 1884 TP_ACPI_HOTKEYSCAN_FNF8, 1885 TP_ACPI_HOTKEYSCAN_FNF9, 1886 TP_ACPI_HOTKEYSCAN_FNF10, 1887 TP_ACPI_HOTKEYSCAN_FNF11, 1888 TP_ACPI_HOTKEYSCAN_FNF12, 1889 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1890 TP_ACPI_HOTKEYSCAN_FNINSERT, 1891 TP_ACPI_HOTKEYSCAN_FNDELETE, 1892 TP_ACPI_HOTKEYSCAN_FNHOME, 1893 TP_ACPI_HOTKEYSCAN_FNEND, 1894 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1895 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1896 TP_ACPI_HOTKEYSCAN_FNSPACE, 1897 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1898 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1899 TP_ACPI_HOTKEYSCAN_MUTE, 1900 TP_ACPI_HOTKEYSCAN_THINKPAD, 1901 TP_ACPI_HOTKEYSCAN_UNK1, 1902 TP_ACPI_HOTKEYSCAN_UNK2, 1903 TP_ACPI_HOTKEYSCAN_UNK3, 1904 TP_ACPI_HOTKEYSCAN_UNK4, 1905 TP_ACPI_HOTKEYSCAN_UNK5, 1906 TP_ACPI_HOTKEYSCAN_UNK6, 1907 TP_ACPI_HOTKEYSCAN_UNK7, 1908 TP_ACPI_HOTKEYSCAN_UNK8, 1909 1910 /* Hotkey keymap size */ 1911 TPACPI_HOTKEY_MAP_LEN 1912 }; 1913 1914 enum { /* Keys/events available through NVRAM polling */ 1915 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1916 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1917 }; 1918 1919 enum { /* Positions of some of the keys in hotkey masks */ 1920 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1921 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1922 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1923 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1924 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1925 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1926 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1927 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1928 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1929 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1930 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1931 }; 1932 1933 enum { /* NVRAM to ACPI HKEY group map */ 1934 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1935 TP_ACPI_HKEY_ZOOM_MASK | 1936 TP_ACPI_HKEY_DISPSWTCH_MASK | 1937 TP_ACPI_HKEY_HIBERNATE_MASK, 1938 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1939 TP_ACPI_HKEY_BRGHTDWN_MASK, 1940 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1941 TP_ACPI_HKEY_VOLDWN_MASK | 1942 TP_ACPI_HKEY_MUTE_MASK, 1943 }; 1944 1945 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1946 struct tp_nvram_state { 1947 u16 thinkpad_toggle:1; 1948 u16 zoom_toggle:1; 1949 u16 display_toggle:1; 1950 u16 thinklight_toggle:1; 1951 u16 hibernate_toggle:1; 1952 u16 displayexp_toggle:1; 1953 u16 display_state:1; 1954 u16 brightness_toggle:1; 1955 u16 volume_toggle:1; 1956 u16 mute:1; 1957 1958 u8 brightness_level; 1959 u8 volume_level; 1960 }; 1961 1962 /* kthread for the hotkey poller */ 1963 static struct task_struct *tpacpi_hotkey_task; 1964 1965 /* Acquired while the poller kthread is running, use to sync start/stop */ 1966 static struct mutex hotkey_thread_mutex; 1967 1968 /* 1969 * Acquire mutex to write poller control variables as an 1970 * atomic block. 1971 * 1972 * Increment hotkey_config_change when changing them if you 1973 * want the kthread to forget old state. 1974 * 1975 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1976 */ 1977 static struct mutex hotkey_thread_data_mutex; 1978 static unsigned int hotkey_config_change; 1979 1980 /* 1981 * hotkey poller control variables 1982 * 1983 * Must be atomic or readers will also need to acquire mutex 1984 * 1985 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1986 * should be used only when the changes need to be taken as 1987 * a block, OR when one needs to force the kthread to forget 1988 * old state. 1989 */ 1990 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 1991 static unsigned int hotkey_poll_freq = 10; /* Hz */ 1992 1993 #define HOTKEY_CONFIG_CRITICAL_START \ 1994 do { \ 1995 mutex_lock(&hotkey_thread_data_mutex); \ 1996 hotkey_config_change++; \ 1997 } while (0); 1998 #define HOTKEY_CONFIG_CRITICAL_END \ 1999 mutex_unlock(&hotkey_thread_data_mutex); 2000 2001 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2002 2003 #define hotkey_source_mask 0U 2004 #define HOTKEY_CONFIG_CRITICAL_START 2005 #define HOTKEY_CONFIG_CRITICAL_END 2006 2007 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2008 2009 static struct mutex hotkey_mutex; 2010 2011 static enum { /* Reasons for waking up */ 2012 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2013 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2014 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2015 } hotkey_wakeup_reason; 2016 2017 static int hotkey_autosleep_ack; 2018 2019 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2020 static u32 hotkey_all_mask; /* all events supported in fw */ 2021 static u32 hotkey_reserved_mask; /* events better left disabled */ 2022 static u32 hotkey_driver_mask; /* events needed by the driver */ 2023 static u32 hotkey_user_mask; /* events visible to userspace */ 2024 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2025 2026 static unsigned int hotkey_report_mode; 2027 2028 static u16 *hotkey_keycode_map; 2029 2030 static struct attribute_set *hotkey_dev_attributes; 2031 2032 static void tpacpi_driver_event(const unsigned int hkey_event); 2033 static void hotkey_driver_event(const unsigned int scancode); 2034 static void hotkey_poll_setup(const bool may_warn); 2035 2036 /* HKEY.MHKG() return bits */ 2037 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2038 2039 static int hotkey_get_wlsw(void) 2040 { 2041 int status; 2042 2043 if (!tp_features.hotkey_wlsw) 2044 return -ENODEV; 2045 2046 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2047 if (dbg_wlswemul) 2048 return (tpacpi_wlsw_emulstate) ? 2049 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2050 #endif 2051 2052 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2053 return -EIO; 2054 2055 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2056 } 2057 2058 static int hotkey_get_tablet_mode(int *status) 2059 { 2060 int s; 2061 2062 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2063 return -EIO; 2064 2065 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2066 return 0; 2067 } 2068 2069 /* 2070 * Reads current event mask from firmware, and updates 2071 * hotkey_acpi_mask accordingly. Also resets any bits 2072 * from hotkey_user_mask that are unavailable to be 2073 * delivered (shadow requirement of the userspace ABI). 2074 * 2075 * Call with hotkey_mutex held 2076 */ 2077 static int hotkey_mask_get(void) 2078 { 2079 if (tp_features.hotkey_mask) { 2080 u32 m = 0; 2081 2082 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2083 return -EIO; 2084 2085 hotkey_acpi_mask = m; 2086 } else { 2087 /* no mask support doesn't mean no event support... */ 2088 hotkey_acpi_mask = hotkey_all_mask; 2089 } 2090 2091 /* sync userspace-visible mask */ 2092 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2093 2094 return 0; 2095 } 2096 2097 void static hotkey_mask_warn_incomplete_mask(void) 2098 { 2099 /* log only what the user can fix... */ 2100 const u32 wantedmask = hotkey_driver_mask & 2101 ~(hotkey_acpi_mask | hotkey_source_mask) & 2102 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2103 2104 if (wantedmask) 2105 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2106 } 2107 2108 /* 2109 * Set the firmware mask when supported 2110 * 2111 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2112 * 2113 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2114 * 2115 * Call with hotkey_mutex held 2116 */ 2117 static int hotkey_mask_set(u32 mask) 2118 { 2119 int i; 2120 int rc = 0; 2121 2122 const u32 fwmask = mask & ~hotkey_source_mask; 2123 2124 if (tp_features.hotkey_mask) { 2125 for (i = 0; i < 32; i++) { 2126 if (!acpi_evalf(hkey_handle, 2127 NULL, "MHKM", "vdd", i + 1, 2128 !!(mask & (1 << i)))) { 2129 rc = -EIO; 2130 break; 2131 } 2132 } 2133 } 2134 2135 /* 2136 * We *must* make an inconditional call to hotkey_mask_get to 2137 * refresh hotkey_acpi_mask and update hotkey_user_mask 2138 * 2139 * Take the opportunity to also log when we cannot _enable_ 2140 * a given event. 2141 */ 2142 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2143 pr_notice("asked for hotkey mask 0x%08x, but " 2144 "firmware forced it to 0x%08x\n", 2145 fwmask, hotkey_acpi_mask); 2146 } 2147 2148 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2149 hotkey_mask_warn_incomplete_mask(); 2150 2151 return rc; 2152 } 2153 2154 /* 2155 * Sets hotkey_user_mask and tries to set the firmware mask 2156 * 2157 * Call with hotkey_mutex held 2158 */ 2159 static int hotkey_user_mask_set(const u32 mask) 2160 { 2161 int rc; 2162 2163 /* Give people a chance to notice they are doing something that 2164 * is bound to go boom on their users sooner or later */ 2165 if (!tp_warned.hotkey_mask_ff && 2166 (mask == 0xffff || mask == 0xffffff || 2167 mask == 0xffffffff)) { 2168 tp_warned.hotkey_mask_ff = 1; 2169 pr_notice("setting the hotkey mask to 0x%08x is likely " 2170 "not the best way to go about it\n", mask); 2171 pr_notice("please consider using the driver defaults, " 2172 "and refer to up-to-date thinkpad-acpi " 2173 "documentation\n"); 2174 } 2175 2176 /* Try to enable what the user asked for, plus whatever we need. 2177 * this syncs everything but won't enable bits in hotkey_user_mask */ 2178 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2179 2180 /* Enable the available bits in hotkey_user_mask */ 2181 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2182 2183 return rc; 2184 } 2185 2186 /* 2187 * Sets the driver hotkey mask. 2188 * 2189 * Can be called even if the hotkey subdriver is inactive 2190 */ 2191 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2192 { 2193 int rc; 2194 2195 /* Do the right thing if hotkey_init has not been called yet */ 2196 if (!tp_features.hotkey) { 2197 hotkey_driver_mask = mask; 2198 return 0; 2199 } 2200 2201 mutex_lock(&hotkey_mutex); 2202 2203 HOTKEY_CONFIG_CRITICAL_START 2204 hotkey_driver_mask = mask; 2205 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2206 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2207 #endif 2208 HOTKEY_CONFIG_CRITICAL_END 2209 2210 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2211 ~hotkey_source_mask); 2212 hotkey_poll_setup(true); 2213 2214 mutex_unlock(&hotkey_mutex); 2215 2216 return rc; 2217 } 2218 2219 static int hotkey_status_get(int *status) 2220 { 2221 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2222 return -EIO; 2223 2224 return 0; 2225 } 2226 2227 static int hotkey_status_set(bool enable) 2228 { 2229 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2230 return -EIO; 2231 2232 return 0; 2233 } 2234 2235 static void tpacpi_input_send_tabletsw(void) 2236 { 2237 int state; 2238 2239 if (tp_features.hotkey_tablet && 2240 !hotkey_get_tablet_mode(&state)) { 2241 mutex_lock(&tpacpi_inputdev_send_mutex); 2242 2243 input_report_switch(tpacpi_inputdev, 2244 SW_TABLET_MODE, !!state); 2245 input_sync(tpacpi_inputdev); 2246 2247 mutex_unlock(&tpacpi_inputdev_send_mutex); 2248 } 2249 } 2250 2251 /* Do NOT call without validating scancode first */ 2252 static void tpacpi_input_send_key(const unsigned int scancode) 2253 { 2254 const unsigned int keycode = hotkey_keycode_map[scancode]; 2255 2256 if (keycode != KEY_RESERVED) { 2257 mutex_lock(&tpacpi_inputdev_send_mutex); 2258 2259 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2260 input_report_key(tpacpi_inputdev, keycode, 1); 2261 input_sync(tpacpi_inputdev); 2262 2263 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2264 input_report_key(tpacpi_inputdev, keycode, 0); 2265 input_sync(tpacpi_inputdev); 2266 2267 mutex_unlock(&tpacpi_inputdev_send_mutex); 2268 } 2269 } 2270 2271 /* Do NOT call without validating scancode first */ 2272 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2273 { 2274 hotkey_driver_event(scancode); 2275 if (hotkey_user_mask & (1 << scancode)) 2276 tpacpi_input_send_key(scancode); 2277 } 2278 2279 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2280 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2281 2282 /* Do NOT call without validating scancode first */ 2283 static void tpacpi_hotkey_send_key(unsigned int scancode) 2284 { 2285 tpacpi_input_send_key_masked(scancode); 2286 if (hotkey_report_mode < 2) { 2287 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device, 2288 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode); 2289 } 2290 } 2291 2292 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2293 { 2294 u8 d; 2295 2296 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2297 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2298 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2299 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2300 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2301 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2302 } 2303 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2304 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2305 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2306 } 2307 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2308 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2309 n->displayexp_toggle = 2310 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2311 } 2312 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2313 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2314 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2315 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2316 n->brightness_toggle = 2317 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2318 } 2319 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2320 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2321 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2322 >> TP_NVRAM_POS_LEVEL_VOLUME; 2323 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2324 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2325 } 2326 } 2327 2328 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2329 struct tp_nvram_state *newn, 2330 const u32 event_mask) 2331 { 2332 2333 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2334 do { \ 2335 if ((event_mask & (1 << __scancode)) && \ 2336 oldn->__member != newn->__member) \ 2337 tpacpi_hotkey_send_key(__scancode); \ 2338 } while (0) 2339 2340 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2341 do { \ 2342 if (event_mask & (1 << __scancode)) \ 2343 tpacpi_hotkey_send_key(__scancode); \ 2344 } while (0) 2345 2346 void issue_volchange(const unsigned int oldvol, 2347 const unsigned int newvol) 2348 { 2349 unsigned int i = oldvol; 2350 2351 while (i > newvol) { 2352 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2353 i--; 2354 } 2355 while (i < newvol) { 2356 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2357 i++; 2358 } 2359 } 2360 2361 void issue_brightnesschange(const unsigned int oldbrt, 2362 const unsigned int newbrt) 2363 { 2364 unsigned int i = oldbrt; 2365 2366 while (i > newbrt) { 2367 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2368 i--; 2369 } 2370 while (i < newbrt) { 2371 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2372 i++; 2373 } 2374 } 2375 2376 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2377 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2378 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2379 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2380 2381 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2382 2383 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2384 2385 /* 2386 * Handle volume 2387 * 2388 * This code is supposed to duplicate the IBM firmware behaviour: 2389 * - Pressing MUTE issues mute hotkey message, even when already mute 2390 * - Pressing Volume up/down issues volume up/down hotkey messages, 2391 * even when already at maximum or minimum volume 2392 * - The act of unmuting issues volume up/down notification, 2393 * depending which key was used to unmute 2394 * 2395 * We are constrained to what the NVRAM can tell us, which is not much 2396 * and certainly not enough if more than one volume hotkey was pressed 2397 * since the last poll cycle. 2398 * 2399 * Just to make our life interesting, some newer Lenovo ThinkPads have 2400 * bugs in the BIOS and may fail to update volume_toggle properly. 2401 */ 2402 if (newn->mute) { 2403 /* muted */ 2404 if (!oldn->mute || 2405 oldn->volume_toggle != newn->volume_toggle || 2406 oldn->volume_level != newn->volume_level) { 2407 /* recently muted, or repeated mute keypress, or 2408 * multiple presses ending in mute */ 2409 issue_volchange(oldn->volume_level, newn->volume_level); 2410 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2411 } 2412 } else { 2413 /* unmute */ 2414 if (oldn->mute) { 2415 /* recently unmuted, issue 'unmute' keypress */ 2416 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2417 } 2418 if (oldn->volume_level != newn->volume_level) { 2419 issue_volchange(oldn->volume_level, newn->volume_level); 2420 } else if (oldn->volume_toggle != newn->volume_toggle) { 2421 /* repeated vol up/down keypress at end of scale ? */ 2422 if (newn->volume_level == 0) 2423 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2424 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2425 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2426 } 2427 } 2428 2429 /* handle brightness */ 2430 if (oldn->brightness_level != newn->brightness_level) { 2431 issue_brightnesschange(oldn->brightness_level, 2432 newn->brightness_level); 2433 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2434 /* repeated key presses that didn't change state */ 2435 if (newn->brightness_level == 0) 2436 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2437 else if (newn->brightness_level >= bright_maxlvl 2438 && !tp_features.bright_unkfw) 2439 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2440 } 2441 2442 #undef TPACPI_COMPARE_KEY 2443 #undef TPACPI_MAY_SEND_KEY 2444 } 2445 2446 /* 2447 * Polling driver 2448 * 2449 * We track all events in hotkey_source_mask all the time, since 2450 * most of them are edge-based. We only issue those requested by 2451 * hotkey_user_mask or hotkey_driver_mask, though. 2452 */ 2453 static int hotkey_kthread(void *data) 2454 { 2455 struct tp_nvram_state s[2]; 2456 u32 poll_mask, event_mask; 2457 unsigned int si, so; 2458 unsigned long t; 2459 unsigned int change_detector, must_reset; 2460 unsigned int poll_freq; 2461 2462 mutex_lock(&hotkey_thread_mutex); 2463 2464 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2465 goto exit; 2466 2467 set_freezable(); 2468 2469 so = 0; 2470 si = 1; 2471 t = 0; 2472 2473 /* Initial state for compares */ 2474 mutex_lock(&hotkey_thread_data_mutex); 2475 change_detector = hotkey_config_change; 2476 poll_mask = hotkey_source_mask; 2477 event_mask = hotkey_source_mask & 2478 (hotkey_driver_mask | hotkey_user_mask); 2479 poll_freq = hotkey_poll_freq; 2480 mutex_unlock(&hotkey_thread_data_mutex); 2481 hotkey_read_nvram(&s[so], poll_mask); 2482 2483 while (!kthread_should_stop()) { 2484 if (t == 0) { 2485 if (likely(poll_freq)) 2486 t = 1000/poll_freq; 2487 else 2488 t = 100; /* should never happen... */ 2489 } 2490 t = msleep_interruptible(t); 2491 if (unlikely(kthread_should_stop())) 2492 break; 2493 must_reset = try_to_freeze(); 2494 if (t > 0 && !must_reset) 2495 continue; 2496 2497 mutex_lock(&hotkey_thread_data_mutex); 2498 if (must_reset || hotkey_config_change != change_detector) { 2499 /* forget old state on thaw or config change */ 2500 si = so; 2501 t = 0; 2502 change_detector = hotkey_config_change; 2503 } 2504 poll_mask = hotkey_source_mask; 2505 event_mask = hotkey_source_mask & 2506 (hotkey_driver_mask | hotkey_user_mask); 2507 poll_freq = hotkey_poll_freq; 2508 mutex_unlock(&hotkey_thread_data_mutex); 2509 2510 if (likely(poll_mask)) { 2511 hotkey_read_nvram(&s[si], poll_mask); 2512 if (likely(si != so)) { 2513 hotkey_compare_and_issue_event(&s[so], &s[si], 2514 event_mask); 2515 } 2516 } 2517 2518 so = si; 2519 si ^= 1; 2520 } 2521 2522 exit: 2523 mutex_unlock(&hotkey_thread_mutex); 2524 return 0; 2525 } 2526 2527 /* call with hotkey_mutex held */ 2528 static void hotkey_poll_stop_sync(void) 2529 { 2530 if (tpacpi_hotkey_task) { 2531 if (frozen(tpacpi_hotkey_task) || 2532 freezing(tpacpi_hotkey_task)) 2533 thaw_process(tpacpi_hotkey_task); 2534 2535 kthread_stop(tpacpi_hotkey_task); 2536 tpacpi_hotkey_task = NULL; 2537 mutex_lock(&hotkey_thread_mutex); 2538 /* at this point, the thread did exit */ 2539 mutex_unlock(&hotkey_thread_mutex); 2540 } 2541 } 2542 2543 /* call with hotkey_mutex held */ 2544 static void hotkey_poll_setup(const bool may_warn) 2545 { 2546 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2547 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2548 2549 if (hotkey_poll_freq > 0 && 2550 (poll_driver_mask || 2551 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2552 if (!tpacpi_hotkey_task) { 2553 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2554 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2555 if (IS_ERR(tpacpi_hotkey_task)) { 2556 tpacpi_hotkey_task = NULL; 2557 pr_err("could not create kernel thread " 2558 "for hotkey polling\n"); 2559 } 2560 } 2561 } else { 2562 hotkey_poll_stop_sync(); 2563 if (may_warn && (poll_driver_mask || poll_user_mask) && 2564 hotkey_poll_freq == 0) { 2565 pr_notice("hot keys 0x%08x and/or events 0x%08x " 2566 "require polling, which is currently " 2567 "disabled\n", 2568 poll_user_mask, poll_driver_mask); 2569 } 2570 } 2571 } 2572 2573 static void hotkey_poll_setup_safe(const bool may_warn) 2574 { 2575 mutex_lock(&hotkey_mutex); 2576 hotkey_poll_setup(may_warn); 2577 mutex_unlock(&hotkey_mutex); 2578 } 2579 2580 /* call with hotkey_mutex held */ 2581 static void hotkey_poll_set_freq(unsigned int freq) 2582 { 2583 if (!freq) 2584 hotkey_poll_stop_sync(); 2585 2586 hotkey_poll_freq = freq; 2587 } 2588 2589 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2590 2591 static void hotkey_poll_setup(const bool __unused) 2592 { 2593 } 2594 2595 static void hotkey_poll_setup_safe(const bool __unused) 2596 { 2597 } 2598 2599 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2600 2601 static int hotkey_inputdev_open(struct input_dev *dev) 2602 { 2603 switch (tpacpi_lifecycle) { 2604 case TPACPI_LIFE_INIT: 2605 case TPACPI_LIFE_RUNNING: 2606 hotkey_poll_setup_safe(false); 2607 return 0; 2608 case TPACPI_LIFE_EXITING: 2609 return -EBUSY; 2610 } 2611 2612 /* Should only happen if tpacpi_lifecycle is corrupt */ 2613 BUG(); 2614 return -EBUSY; 2615 } 2616 2617 static void hotkey_inputdev_close(struct input_dev *dev) 2618 { 2619 /* disable hotkey polling when possible */ 2620 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2621 !(hotkey_source_mask & hotkey_driver_mask)) 2622 hotkey_poll_setup_safe(false); 2623 } 2624 2625 /* sysfs hotkey enable ------------------------------------------------- */ 2626 static ssize_t hotkey_enable_show(struct device *dev, 2627 struct device_attribute *attr, 2628 char *buf) 2629 { 2630 int res, status; 2631 2632 printk_deprecated_attribute("hotkey_enable", 2633 "Hotkey reporting is always enabled"); 2634 2635 res = hotkey_status_get(&status); 2636 if (res) 2637 return res; 2638 2639 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2640 } 2641 2642 static ssize_t hotkey_enable_store(struct device *dev, 2643 struct device_attribute *attr, 2644 const char *buf, size_t count) 2645 { 2646 unsigned long t; 2647 2648 printk_deprecated_attribute("hotkey_enable", 2649 "Hotkeys can be disabled through hotkey_mask"); 2650 2651 if (parse_strtoul(buf, 1, &t)) 2652 return -EINVAL; 2653 2654 if (t == 0) 2655 return -EPERM; 2656 2657 return count; 2658 } 2659 2660 static struct device_attribute dev_attr_hotkey_enable = 2661 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO, 2662 hotkey_enable_show, hotkey_enable_store); 2663 2664 /* sysfs hotkey mask --------------------------------------------------- */ 2665 static ssize_t hotkey_mask_show(struct device *dev, 2666 struct device_attribute *attr, 2667 char *buf) 2668 { 2669 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2670 } 2671 2672 static ssize_t hotkey_mask_store(struct device *dev, 2673 struct device_attribute *attr, 2674 const char *buf, size_t count) 2675 { 2676 unsigned long t; 2677 int res; 2678 2679 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2680 return -EINVAL; 2681 2682 if (mutex_lock_killable(&hotkey_mutex)) 2683 return -ERESTARTSYS; 2684 2685 res = hotkey_user_mask_set(t); 2686 2687 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2688 hotkey_poll_setup(true); 2689 #endif 2690 2691 mutex_unlock(&hotkey_mutex); 2692 2693 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2694 2695 return (res) ? res : count; 2696 } 2697 2698 static struct device_attribute dev_attr_hotkey_mask = 2699 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO, 2700 hotkey_mask_show, hotkey_mask_store); 2701 2702 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2703 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2704 struct device_attribute *attr, 2705 char *buf) 2706 { 2707 return sprintf(buf, "0\n"); 2708 } 2709 2710 static struct device_attribute dev_attr_hotkey_bios_enabled = 2711 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL); 2712 2713 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2714 static ssize_t hotkey_bios_mask_show(struct device *dev, 2715 struct device_attribute *attr, 2716 char *buf) 2717 { 2718 printk_deprecated_attribute("hotkey_bios_mask", 2719 "This attribute is useless."); 2720 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2721 } 2722 2723 static struct device_attribute dev_attr_hotkey_bios_mask = 2724 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL); 2725 2726 /* sysfs hotkey all_mask ----------------------------------------------- */ 2727 static ssize_t hotkey_all_mask_show(struct device *dev, 2728 struct device_attribute *attr, 2729 char *buf) 2730 { 2731 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2732 hotkey_all_mask | hotkey_source_mask); 2733 } 2734 2735 static struct device_attribute dev_attr_hotkey_all_mask = 2736 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL); 2737 2738 /* sysfs hotkey recommended_mask --------------------------------------- */ 2739 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2740 struct device_attribute *attr, 2741 char *buf) 2742 { 2743 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2744 (hotkey_all_mask | hotkey_source_mask) 2745 & ~hotkey_reserved_mask); 2746 } 2747 2748 static struct device_attribute dev_attr_hotkey_recommended_mask = 2749 __ATTR(hotkey_recommended_mask, S_IRUGO, 2750 hotkey_recommended_mask_show, NULL); 2751 2752 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2753 2754 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2755 static ssize_t hotkey_source_mask_show(struct device *dev, 2756 struct device_attribute *attr, 2757 char *buf) 2758 { 2759 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2760 } 2761 2762 static ssize_t hotkey_source_mask_store(struct device *dev, 2763 struct device_attribute *attr, 2764 const char *buf, size_t count) 2765 { 2766 unsigned long t; 2767 u32 r_ev; 2768 int rc; 2769 2770 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2771 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2772 return -EINVAL; 2773 2774 if (mutex_lock_killable(&hotkey_mutex)) 2775 return -ERESTARTSYS; 2776 2777 HOTKEY_CONFIG_CRITICAL_START 2778 hotkey_source_mask = t; 2779 HOTKEY_CONFIG_CRITICAL_END 2780 2781 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2782 ~hotkey_source_mask); 2783 hotkey_poll_setup(true); 2784 2785 /* check if events needed by the driver got disabled */ 2786 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2787 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2788 2789 mutex_unlock(&hotkey_mutex); 2790 2791 if (rc < 0) 2792 pr_err("hotkey_source_mask: " 2793 "failed to update the firmware event mask!\n"); 2794 2795 if (r_ev) 2796 pr_notice("hotkey_source_mask: " 2797 "some important events were disabled: 0x%04x\n", 2798 r_ev); 2799 2800 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2801 2802 return (rc < 0) ? rc : count; 2803 } 2804 2805 static struct device_attribute dev_attr_hotkey_source_mask = 2806 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO, 2807 hotkey_source_mask_show, hotkey_source_mask_store); 2808 2809 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2810 static ssize_t hotkey_poll_freq_show(struct device *dev, 2811 struct device_attribute *attr, 2812 char *buf) 2813 { 2814 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2815 } 2816 2817 static ssize_t hotkey_poll_freq_store(struct device *dev, 2818 struct device_attribute *attr, 2819 const char *buf, size_t count) 2820 { 2821 unsigned long t; 2822 2823 if (parse_strtoul(buf, 25, &t)) 2824 return -EINVAL; 2825 2826 if (mutex_lock_killable(&hotkey_mutex)) 2827 return -ERESTARTSYS; 2828 2829 hotkey_poll_set_freq(t); 2830 hotkey_poll_setup(true); 2831 2832 mutex_unlock(&hotkey_mutex); 2833 2834 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2835 2836 return count; 2837 } 2838 2839 static struct device_attribute dev_attr_hotkey_poll_freq = 2840 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO, 2841 hotkey_poll_freq_show, hotkey_poll_freq_store); 2842 2843 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2844 2845 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2846 static ssize_t hotkey_radio_sw_show(struct device *dev, 2847 struct device_attribute *attr, 2848 char *buf) 2849 { 2850 int res; 2851 res = hotkey_get_wlsw(); 2852 if (res < 0) 2853 return res; 2854 2855 /* Opportunistic update */ 2856 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2857 2858 return snprintf(buf, PAGE_SIZE, "%d\n", 2859 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2860 } 2861 2862 static struct device_attribute dev_attr_hotkey_radio_sw = 2863 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL); 2864 2865 static void hotkey_radio_sw_notify_change(void) 2866 { 2867 if (tp_features.hotkey_wlsw) 2868 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2869 "hotkey_radio_sw"); 2870 } 2871 2872 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2873 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2874 struct device_attribute *attr, 2875 char *buf) 2876 { 2877 int res, s; 2878 res = hotkey_get_tablet_mode(&s); 2879 if (res < 0) 2880 return res; 2881 2882 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2883 } 2884 2885 static struct device_attribute dev_attr_hotkey_tablet_mode = 2886 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL); 2887 2888 static void hotkey_tablet_mode_notify_change(void) 2889 { 2890 if (tp_features.hotkey_tablet) 2891 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2892 "hotkey_tablet_mode"); 2893 } 2894 2895 /* sysfs hotkey report_mode -------------------------------------------- */ 2896 static ssize_t hotkey_report_mode_show(struct device *dev, 2897 struct device_attribute *attr, 2898 char *buf) 2899 { 2900 return snprintf(buf, PAGE_SIZE, "%d\n", 2901 (hotkey_report_mode != 0) ? hotkey_report_mode : 1); 2902 } 2903 2904 static struct device_attribute dev_attr_hotkey_report_mode = 2905 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL); 2906 2907 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2908 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2909 struct device_attribute *attr, 2910 char *buf) 2911 { 2912 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2913 } 2914 2915 static struct device_attribute dev_attr_hotkey_wakeup_reason = 2916 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2917 2918 static void hotkey_wakeup_reason_notify_change(void) 2919 { 2920 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2921 "wakeup_reason"); 2922 } 2923 2924 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2925 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2926 struct device_attribute *attr, 2927 char *buf) 2928 { 2929 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2930 } 2931 2932 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete = 2933 __ATTR(wakeup_hotunplug_complete, S_IRUGO, 2934 hotkey_wakeup_hotunplug_complete_show, NULL); 2935 2936 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2937 { 2938 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2939 "wakeup_hotunplug_complete"); 2940 } 2941 2942 /* --------------------------------------------------------------------- */ 2943 2944 static struct attribute *hotkey_attributes[] __initdata = { 2945 &dev_attr_hotkey_enable.attr, 2946 &dev_attr_hotkey_bios_enabled.attr, 2947 &dev_attr_hotkey_bios_mask.attr, 2948 &dev_attr_hotkey_report_mode.attr, 2949 &dev_attr_hotkey_wakeup_reason.attr, 2950 &dev_attr_hotkey_wakeup_hotunplug_complete.attr, 2951 &dev_attr_hotkey_mask.attr, 2952 &dev_attr_hotkey_all_mask.attr, 2953 &dev_attr_hotkey_recommended_mask.attr, 2954 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2955 &dev_attr_hotkey_source_mask.attr, 2956 &dev_attr_hotkey_poll_freq.attr, 2957 #endif 2958 }; 2959 2960 /* 2961 * Sync both the hw and sw blocking state of all switches 2962 */ 2963 static void tpacpi_send_radiosw_update(void) 2964 { 2965 int wlsw; 2966 2967 /* 2968 * We must sync all rfkill controllers *before* issuing any 2969 * rfkill input events, or we will race the rfkill core input 2970 * handler. 2971 * 2972 * tpacpi_inputdev_send_mutex works as a synchronization point 2973 * for the above. 2974 * 2975 * We optimize to avoid numerous calls to hotkey_get_wlsw. 2976 */ 2977 2978 wlsw = hotkey_get_wlsw(); 2979 2980 /* Sync hw blocking state first if it is hw-blocked */ 2981 if (wlsw == TPACPI_RFK_RADIO_OFF) 2982 tpacpi_rfk_update_hwblock_state(true); 2983 2984 /* Sync sw blocking state */ 2985 tpacpi_rfk_update_swstate_all(); 2986 2987 /* Sync hw blocking state last if it is hw-unblocked */ 2988 if (wlsw == TPACPI_RFK_RADIO_ON) 2989 tpacpi_rfk_update_hwblock_state(false); 2990 2991 /* Issue rfkill input event for WLSW switch */ 2992 if (!(wlsw < 0)) { 2993 mutex_lock(&tpacpi_inputdev_send_mutex); 2994 2995 input_report_switch(tpacpi_inputdev, 2996 SW_RFKILL_ALL, (wlsw > 0)); 2997 input_sync(tpacpi_inputdev); 2998 2999 mutex_unlock(&tpacpi_inputdev_send_mutex); 3000 } 3001 3002 /* 3003 * this can be unconditional, as we will poll state again 3004 * if userspace uses the notify to read data 3005 */ 3006 hotkey_radio_sw_notify_change(); 3007 } 3008 3009 static void hotkey_exit(void) 3010 { 3011 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3012 mutex_lock(&hotkey_mutex); 3013 hotkey_poll_stop_sync(); 3014 mutex_unlock(&hotkey_mutex); 3015 #endif 3016 3017 if (hotkey_dev_attributes) 3018 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3019 3020 kfree(hotkey_keycode_map); 3021 3022 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3023 "restoring original HKEY status and mask\n"); 3024 /* yes, there is a bitwise or below, we want the 3025 * functions to be called even if one of them fail */ 3026 if (((tp_features.hotkey_mask && 3027 hotkey_mask_set(hotkey_orig_mask)) | 3028 hotkey_status_set(false)) != 0) 3029 pr_err("failed to restore hot key mask " 3030 "to BIOS defaults\n"); 3031 } 3032 3033 static void __init hotkey_unmap(const unsigned int scancode) 3034 { 3035 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3036 clear_bit(hotkey_keycode_map[scancode], 3037 tpacpi_inputdev->keybit); 3038 hotkey_keycode_map[scancode] = KEY_RESERVED; 3039 } 3040 } 3041 3042 /* 3043 * HKEY quirks: 3044 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3045 */ 3046 3047 #define TPACPI_HK_Q_INIMASK 0x0001 3048 3049 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3050 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3051 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3052 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3053 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3054 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3055 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3056 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3057 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3058 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3059 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3060 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3061 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3062 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3063 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3064 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3065 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3066 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3067 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3068 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3069 }; 3070 3071 typedef u16 tpacpi_keymap_entry_t; 3072 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3073 3074 static int __init hotkey_init(struct ibm_init_struct *iibm) 3075 { 3076 /* Requirements for changing the default keymaps: 3077 * 3078 * 1. Many of the keys are mapped to KEY_RESERVED for very 3079 * good reasons. Do not change them unless you have deep 3080 * knowledge on the IBM and Lenovo ThinkPad firmware for 3081 * the various ThinkPad models. The driver behaves 3082 * differently for KEY_RESERVED: such keys have their 3083 * hot key mask *unset* in mask_recommended, and also 3084 * in the initial hot key mask programmed into the 3085 * firmware at driver load time, which means the firm- 3086 * ware may react very differently if you change them to 3087 * something else; 3088 * 3089 * 2. You must be subscribed to the linux-thinkpad and 3090 * ibm-acpi-devel mailing lists, and you should read the 3091 * list archives since 2007 if you want to change the 3092 * keymaps. This requirement exists so that you will 3093 * know the past history of problems with the thinkpad- 3094 * acpi driver keymaps, and also that you will be 3095 * listening to any bug reports; 3096 * 3097 * 3. Do not send thinkpad-acpi specific patches directly to 3098 * for merging, *ever*. Send them to the linux-acpi 3099 * mailinglist for comments. Merging is to be done only 3100 * through acpi-test and the ACPI maintainer. 3101 * 3102 * If the above is too much to ask, don't change the keymap. 3103 * Ask the thinkpad-acpi maintainer to do it, instead. 3104 */ 3105 3106 enum keymap_index { 3107 TPACPI_KEYMAP_IBM_GENERIC = 0, 3108 TPACPI_KEYMAP_LENOVO_GENERIC, 3109 }; 3110 3111 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3112 /* Generic keymap for IBM ThinkPads */ 3113 [TPACPI_KEYMAP_IBM_GENERIC] = { 3114 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3115 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3116 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3117 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3118 3119 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3120 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3121 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3122 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3123 3124 /* brightness: firmware always reacts to them */ 3125 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3126 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3127 3128 /* Thinklight: firmware always react to it */ 3129 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3130 3131 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3132 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3133 3134 /* Volume: firmware always react to it and reprograms 3135 * the built-in *extra* mixer. Never map it to control 3136 * another mixer by default. */ 3137 KEY_RESERVED, /* 0x14: VOLUME UP */ 3138 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3139 KEY_RESERVED, /* 0x16: MUTE */ 3140 3141 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3142 3143 /* (assignments unknown, please report if found) */ 3144 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3145 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3146 }, 3147 3148 /* Generic keymap for Lenovo ThinkPads */ 3149 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3150 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3151 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3152 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3153 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3154 3155 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3156 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3157 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3158 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3159 3160 /* These should be enabled --only-- when ACPI video 3161 * is disabled (i.e. in "vendor" mode), and are handled 3162 * in a special way by the init code */ 3163 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3164 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3165 3166 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3167 3168 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3169 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3170 3171 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3172 * react to it and reprograms the built-in *extra* mixer. 3173 * Never map it to control another mixer by default. 3174 * 3175 * T60?, T61, R60?, R61: firmware and EC tries to send 3176 * these over the regular keyboard, so these are no-ops, 3177 * but there are still weird bugs re. MUTE, so do not 3178 * change unless you get test reports from all Lenovo 3179 * models. May cause the BIOS to interfere with the 3180 * HDA mixer. 3181 */ 3182 KEY_RESERVED, /* 0x14: VOLUME UP */ 3183 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3184 KEY_RESERVED, /* 0x16: MUTE */ 3185 3186 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3187 3188 /* (assignments unknown, please report if found) */ 3189 KEY_UNKNOWN, KEY_UNKNOWN, 3190 3191 /* 3192 * The mic mute button only sends 0x1a. It does not 3193 * automatically mute the mic or change the mute light. 3194 */ 3195 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3196 3197 /* (assignments unknown, please report if found) */ 3198 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3199 KEY_UNKNOWN, 3200 }, 3201 }; 3202 3203 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3204 /* Generic maps (fallback) */ 3205 { 3206 .vendor = PCI_VENDOR_ID_IBM, 3207 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3208 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3209 }, 3210 { 3211 .vendor = PCI_VENDOR_ID_LENOVO, 3212 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3213 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3214 }, 3215 }; 3216 3217 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3218 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3219 3220 int res, i; 3221 int status; 3222 int hkeyv; 3223 bool radiosw_state = false; 3224 bool tabletsw_state = false; 3225 3226 unsigned long quirks; 3227 unsigned long keymap_id; 3228 3229 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3230 "initializing hotkey subdriver\n"); 3231 3232 BUG_ON(!tpacpi_inputdev); 3233 BUG_ON(tpacpi_inputdev->open != NULL || 3234 tpacpi_inputdev->close != NULL); 3235 3236 TPACPI_ACPIHANDLE_INIT(hkey); 3237 mutex_init(&hotkey_mutex); 3238 3239 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3240 mutex_init(&hotkey_thread_mutex); 3241 mutex_init(&hotkey_thread_data_mutex); 3242 #endif 3243 3244 /* hotkey not supported on 570 */ 3245 tp_features.hotkey = hkey_handle != NULL; 3246 3247 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3248 "hotkeys are %s\n", 3249 str_supported(tp_features.hotkey)); 3250 3251 if (!tp_features.hotkey) 3252 return 1; 3253 3254 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3255 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3256 3257 tpacpi_disable_brightness_delay(); 3258 3259 /* MUST have enough space for all attributes to be added to 3260 * hotkey_dev_attributes */ 3261 hotkey_dev_attributes = create_attr_set( 3262 ARRAY_SIZE(hotkey_attributes) + 2, 3263 NULL); 3264 if (!hotkey_dev_attributes) 3265 return -ENOMEM; 3266 res = add_many_to_attr_set(hotkey_dev_attributes, 3267 hotkey_attributes, 3268 ARRAY_SIZE(hotkey_attributes)); 3269 if (res) 3270 goto err_exit; 3271 3272 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3273 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3274 for HKEY interface version 0x100 */ 3275 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3276 if ((hkeyv >> 8) != 1) { 3277 pr_err("unknown version of the HKEY interface: 0x%x\n", 3278 hkeyv); 3279 pr_err("please report this to %s\n", TPACPI_MAIL); 3280 } else { 3281 /* 3282 * MHKV 0x100 in A31, R40, R40e, 3283 * T4x, X31, and later 3284 */ 3285 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3286 "firmware HKEY interface version: 0x%x\n", 3287 hkeyv); 3288 3289 /* Paranoia check AND init hotkey_all_mask */ 3290 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3291 "MHKA", "qd")) { 3292 pr_err("missing MHKA handler, " 3293 "please report this to %s\n", 3294 TPACPI_MAIL); 3295 /* Fallback: pre-init for FN+F3,F4,F12 */ 3296 hotkey_all_mask = 0x080cU; 3297 } else { 3298 tp_features.hotkey_mask = 1; 3299 } 3300 } 3301 } 3302 3303 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3304 "hotkey masks are %s\n", 3305 str_supported(tp_features.hotkey_mask)); 3306 3307 /* Init hotkey_all_mask if not initialized yet */ 3308 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3309 (quirks & TPACPI_HK_Q_INIMASK)) 3310 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3311 3312 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3313 if (tp_features.hotkey_mask) { 3314 /* hotkey_source_mask *must* be zero for 3315 * the first hotkey_mask_get to return hotkey_orig_mask */ 3316 res = hotkey_mask_get(); 3317 if (res) 3318 goto err_exit; 3319 3320 hotkey_orig_mask = hotkey_acpi_mask; 3321 } else { 3322 hotkey_orig_mask = hotkey_all_mask; 3323 hotkey_acpi_mask = hotkey_all_mask; 3324 } 3325 3326 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3327 if (dbg_wlswemul) { 3328 tp_features.hotkey_wlsw = 1; 3329 radiosw_state = !!tpacpi_wlsw_emulstate; 3330 pr_info("radio switch emulation enabled\n"); 3331 } else 3332 #endif 3333 /* Not all thinkpads have a hardware radio switch */ 3334 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3335 tp_features.hotkey_wlsw = 1; 3336 radiosw_state = !!status; 3337 pr_info("radio switch found; radios are %s\n", 3338 enabled(status, 0)); 3339 } 3340 if (tp_features.hotkey_wlsw) 3341 res = add_to_attr_set(hotkey_dev_attributes, 3342 &dev_attr_hotkey_radio_sw.attr); 3343 3344 /* For X41t, X60t, X61t Tablets... */ 3345 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3346 tp_features.hotkey_tablet = 1; 3347 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); 3348 pr_info("possible tablet mode switch found; " 3349 "ThinkPad in %s mode\n", 3350 (tabletsw_state) ? "tablet" : "laptop"); 3351 res = add_to_attr_set(hotkey_dev_attributes, 3352 &dev_attr_hotkey_tablet_mode.attr); 3353 } 3354 3355 if (!res) 3356 res = register_attr_set_with_sysfs( 3357 hotkey_dev_attributes, 3358 &tpacpi_pdev->dev.kobj); 3359 if (res) 3360 goto err_exit; 3361 3362 /* Set up key map */ 3363 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3364 GFP_KERNEL); 3365 if (!hotkey_keycode_map) { 3366 pr_err("failed to allocate memory for key map\n"); 3367 res = -ENOMEM; 3368 goto err_exit; 3369 } 3370 3371 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3372 ARRAY_SIZE(tpacpi_keymap_qtable)); 3373 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3374 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3375 "using keymap number %lu\n", keymap_id); 3376 3377 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3378 TPACPI_HOTKEY_MAP_SIZE); 3379 3380 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3381 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3382 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3383 tpacpi_inputdev->keycode = hotkey_keycode_map; 3384 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3385 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3386 input_set_capability(tpacpi_inputdev, EV_KEY, 3387 hotkey_keycode_map[i]); 3388 } else { 3389 if (i < sizeof(hotkey_reserved_mask)*8) 3390 hotkey_reserved_mask |= 1 << i; 3391 } 3392 } 3393 3394 if (tp_features.hotkey_wlsw) { 3395 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3396 input_report_switch(tpacpi_inputdev, 3397 SW_RFKILL_ALL, radiosw_state); 3398 } 3399 if (tp_features.hotkey_tablet) { 3400 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3401 input_report_switch(tpacpi_inputdev, 3402 SW_TABLET_MODE, tabletsw_state); 3403 } 3404 3405 /* Do not issue duplicate brightness change events to 3406 * userspace. tpacpi_detect_brightness_capabilities() must have 3407 * been called before this point */ 3408 if (tp_features.bright_acpimode && acpi_video_backlight_support()) { 3409 pr_info("This ThinkPad has standard ACPI backlight " 3410 "brightness control, supported by the ACPI " 3411 "video driver\n"); 3412 pr_notice("Disabling thinkpad-acpi brightness events " 3413 "by default...\n"); 3414 3415 /* Disable brightness up/down on Lenovo thinkpads when 3416 * ACPI is handling them, otherwise it is plain impossible 3417 * for userspace to do something even remotely sane */ 3418 hotkey_reserved_mask |= 3419 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3420 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3421 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3422 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3423 } 3424 3425 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3426 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3427 & ~hotkey_all_mask 3428 & ~hotkey_reserved_mask; 3429 3430 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3431 "hotkey source mask 0x%08x, polling freq %u\n", 3432 hotkey_source_mask, hotkey_poll_freq); 3433 #endif 3434 3435 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3436 "enabling firmware HKEY event interface...\n"); 3437 res = hotkey_status_set(true); 3438 if (res) { 3439 hotkey_exit(); 3440 return res; 3441 } 3442 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3443 | hotkey_driver_mask) 3444 & ~hotkey_source_mask); 3445 if (res < 0 && res != -ENXIO) { 3446 hotkey_exit(); 3447 return res; 3448 } 3449 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3450 & ~hotkey_reserved_mask; 3451 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3452 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3453 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3454 3455 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3456 "legacy ibm/hotkey event reporting over procfs %s\n", 3457 (hotkey_report_mode < 2) ? 3458 "enabled" : "disabled"); 3459 3460 tpacpi_inputdev->open = &hotkey_inputdev_open; 3461 tpacpi_inputdev->close = &hotkey_inputdev_close; 3462 3463 hotkey_poll_setup_safe(true); 3464 3465 return 0; 3466 3467 err_exit: 3468 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3469 hotkey_dev_attributes = NULL; 3470 3471 return (res < 0)? res : 1; 3472 } 3473 3474 static bool hotkey_notify_hotkey(const u32 hkey, 3475 bool *send_acpi_ev, 3476 bool *ignore_acpi_ev) 3477 { 3478 /* 0x1000-0x1FFF: key presses */ 3479 unsigned int scancode = hkey & 0xfff; 3480 *send_acpi_ev = true; 3481 *ignore_acpi_ev = false; 3482 3483 /* HKEY event 0x1001 is scancode 0x00 */ 3484 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3485 scancode--; 3486 if (!(hotkey_source_mask & (1 << scancode))) { 3487 tpacpi_input_send_key_masked(scancode); 3488 *send_acpi_ev = false; 3489 } else { 3490 *ignore_acpi_ev = true; 3491 } 3492 return true; 3493 } 3494 return false; 3495 } 3496 3497 static bool hotkey_notify_wakeup(const u32 hkey, 3498 bool *send_acpi_ev, 3499 bool *ignore_acpi_ev) 3500 { 3501 /* 0x2000-0x2FFF: Wakeup reason */ 3502 *send_acpi_ev = true; 3503 *ignore_acpi_ev = false; 3504 3505 switch (hkey) { 3506 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3507 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3508 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3509 *ignore_acpi_ev = true; 3510 break; 3511 3512 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3513 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3514 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3515 *ignore_acpi_ev = true; 3516 break; 3517 3518 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3519 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3520 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3521 /* how to auto-heal: */ 3522 /* 2313: woke up from S3, go to S4/S5 */ 3523 /* 2413: woke up from S4, go to S5 */ 3524 break; 3525 3526 default: 3527 return false; 3528 } 3529 3530 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3531 pr_info("woke up due to a hot-unplug request...\n"); 3532 hotkey_wakeup_reason_notify_change(); 3533 } 3534 return true; 3535 } 3536 3537 static bool hotkey_notify_dockevent(const u32 hkey, 3538 bool *send_acpi_ev, 3539 bool *ignore_acpi_ev) 3540 { 3541 /* 0x4000-0x4FFF: dock-related events */ 3542 *send_acpi_ev = true; 3543 *ignore_acpi_ev = false; 3544 3545 switch (hkey) { 3546 case TP_HKEY_EV_UNDOCK_ACK: 3547 /* ACPI undock operation completed after wakeup */ 3548 hotkey_autosleep_ack = 1; 3549 pr_info("undocked\n"); 3550 hotkey_wakeup_hotunplug_complete_notify_change(); 3551 return true; 3552 3553 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3554 pr_info("docked into hotplug port replicator\n"); 3555 return true; 3556 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3557 pr_info("undocked from hotplug port replicator\n"); 3558 return true; 3559 3560 default: 3561 return false; 3562 } 3563 } 3564 3565 static bool hotkey_notify_usrevent(const u32 hkey, 3566 bool *send_acpi_ev, 3567 bool *ignore_acpi_ev) 3568 { 3569 /* 0x5000-0x5FFF: human interface helpers */ 3570 *send_acpi_ev = true; 3571 *ignore_acpi_ev = false; 3572 3573 switch (hkey) { 3574 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3575 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3576 return true; 3577 3578 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3579 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3580 tpacpi_input_send_tabletsw(); 3581 hotkey_tablet_mode_notify_change(); 3582 *send_acpi_ev = false; 3583 return true; 3584 3585 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3586 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3587 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3588 /* do not propagate these events */ 3589 *ignore_acpi_ev = true; 3590 return true; 3591 3592 default: 3593 return false; 3594 } 3595 } 3596 3597 static void thermal_dump_all_sensors(void); 3598 3599 static bool hotkey_notify_6xxx(const u32 hkey, 3600 bool *send_acpi_ev, 3601 bool *ignore_acpi_ev) 3602 { 3603 bool known = true; 3604 3605 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 3606 *send_acpi_ev = true; 3607 *ignore_acpi_ev = false; 3608 3609 switch (hkey) { 3610 case TP_HKEY_EV_THM_TABLE_CHANGED: 3611 pr_info("EC reports that Thermal Table has changed\n"); 3612 /* recommended action: do nothing, we don't have 3613 * Lenovo ATM information */ 3614 return true; 3615 case TP_HKEY_EV_ALARM_BAT_HOT: 3616 pr_crit("THERMAL ALARM: battery is too hot!\n"); 3617 /* recommended action: warn user through gui */ 3618 break; 3619 case TP_HKEY_EV_ALARM_BAT_XHOT: 3620 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 3621 /* recommended action: immediate sleep/hibernate */ 3622 break; 3623 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3624 pr_crit("THERMAL ALARM: " 3625 "a sensor reports something is too hot!\n"); 3626 /* recommended action: warn user through gui, that */ 3627 /* some internal component is too hot */ 3628 break; 3629 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3630 pr_alert("THERMAL EMERGENCY: " 3631 "a sensor reports something is extremely hot!\n"); 3632 /* recommended action: immediate sleep/hibernate */ 3633 break; 3634 3635 case TP_HKEY_EV_KEY_NUMLOCK: 3636 case TP_HKEY_EV_KEY_FN: 3637 /* key press events, we just ignore them as long as the EC 3638 * is still reporting them in the normal keyboard stream */ 3639 *send_acpi_ev = false; 3640 *ignore_acpi_ev = true; 3641 return true; 3642 3643 default: 3644 pr_warn("unknown possible thermal alarm or keyboard event received\n"); 3645 known = false; 3646 } 3647 3648 thermal_dump_all_sensors(); 3649 3650 return known; 3651 } 3652 3653 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3654 { 3655 u32 hkey; 3656 bool send_acpi_ev; 3657 bool ignore_acpi_ev; 3658 bool known_ev; 3659 3660 if (event != 0x80) { 3661 pr_err("unknown HKEY notification event %d\n", event); 3662 /* forward it to userspace, maybe it knows how to handle it */ 3663 acpi_bus_generate_netlink_event( 3664 ibm->acpi->device->pnp.device_class, 3665 dev_name(&ibm->acpi->device->dev), 3666 event, 0); 3667 return; 3668 } 3669 3670 while (1) { 3671 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3672 pr_err("failed to retrieve HKEY event\n"); 3673 return; 3674 } 3675 3676 if (hkey == 0) { 3677 /* queue empty */ 3678 return; 3679 } 3680 3681 send_acpi_ev = true; 3682 ignore_acpi_ev = false; 3683 3684 switch (hkey >> 12) { 3685 case 1: 3686 /* 0x1000-0x1FFF: key presses */ 3687 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3688 &ignore_acpi_ev); 3689 break; 3690 case 2: 3691 /* 0x2000-0x2FFF: Wakeup reason */ 3692 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3693 &ignore_acpi_ev); 3694 break; 3695 case 3: 3696 /* 0x3000-0x3FFF: bay-related wakeups */ 3697 switch (hkey) { 3698 case TP_HKEY_EV_BAYEJ_ACK: 3699 hotkey_autosleep_ack = 1; 3700 pr_info("bay ejected\n"); 3701 hotkey_wakeup_hotunplug_complete_notify_change(); 3702 known_ev = true; 3703 break; 3704 case TP_HKEY_EV_OPTDRV_EJ: 3705 /* FIXME: kick libata if SATA link offline */ 3706 known_ev = true; 3707 break; 3708 default: 3709 known_ev = false; 3710 } 3711 break; 3712 case 4: 3713 /* 0x4000-0x4FFF: dock-related events */ 3714 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 3715 &ignore_acpi_ev); 3716 break; 3717 case 5: 3718 /* 0x5000-0x5FFF: human interface helpers */ 3719 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3720 &ignore_acpi_ev); 3721 break; 3722 case 6: 3723 /* 0x6000-0x6FFF: thermal alarms/notices and 3724 * keyboard events */ 3725 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 3726 &ignore_acpi_ev); 3727 break; 3728 case 7: 3729 /* 0x7000-0x7FFF: misc */ 3730 if (tp_features.hotkey_wlsw && 3731 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3732 tpacpi_send_radiosw_update(); 3733 send_acpi_ev = 0; 3734 known_ev = true; 3735 break; 3736 } 3737 /* fallthrough to default */ 3738 default: 3739 known_ev = false; 3740 } 3741 if (!known_ev) { 3742 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 3743 pr_notice("please report the conditions when this " 3744 "event happened to %s\n", TPACPI_MAIL); 3745 } 3746 3747 /* Legacy events */ 3748 if (!ignore_acpi_ev && 3749 (send_acpi_ev || hotkey_report_mode < 2)) { 3750 acpi_bus_generate_proc_event(ibm->acpi->device, 3751 event, hkey); 3752 } 3753 3754 /* netlink events */ 3755 if (!ignore_acpi_ev && send_acpi_ev) { 3756 acpi_bus_generate_netlink_event( 3757 ibm->acpi->device->pnp.device_class, 3758 dev_name(&ibm->acpi->device->dev), 3759 event, hkey); 3760 } 3761 } 3762 } 3763 3764 static void hotkey_suspend(pm_message_t state) 3765 { 3766 /* Do these on suspend, we get the events on early resume! */ 3767 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 3768 hotkey_autosleep_ack = 0; 3769 } 3770 3771 static void hotkey_resume(void) 3772 { 3773 tpacpi_disable_brightness_delay(); 3774 3775 if (hotkey_status_set(true) < 0 || 3776 hotkey_mask_set(hotkey_acpi_mask) < 0) 3777 pr_err("error while attempting to reset the event " 3778 "firmware interface\n"); 3779 3780 tpacpi_send_radiosw_update(); 3781 hotkey_tablet_mode_notify_change(); 3782 hotkey_wakeup_reason_notify_change(); 3783 hotkey_wakeup_hotunplug_complete_notify_change(); 3784 hotkey_poll_setup_safe(false); 3785 } 3786 3787 /* procfs -------------------------------------------------------------- */ 3788 static int hotkey_read(struct seq_file *m) 3789 { 3790 int res, status; 3791 3792 if (!tp_features.hotkey) { 3793 seq_printf(m, "status:\t\tnot supported\n"); 3794 return 0; 3795 } 3796 3797 if (mutex_lock_killable(&hotkey_mutex)) 3798 return -ERESTARTSYS; 3799 res = hotkey_status_get(&status); 3800 if (!res) 3801 res = hotkey_mask_get(); 3802 mutex_unlock(&hotkey_mutex); 3803 if (res) 3804 return res; 3805 3806 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 3807 if (hotkey_all_mask) { 3808 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 3809 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 3810 } else { 3811 seq_printf(m, "mask:\t\tnot supported\n"); 3812 seq_printf(m, "commands:\tenable, disable, reset\n"); 3813 } 3814 3815 return 0; 3816 } 3817 3818 static void hotkey_enabledisable_warn(bool enable) 3819 { 3820 tpacpi_log_usertask("procfs hotkey enable/disable"); 3821 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 3822 pr_fmt("hotkey enable/disable functionality has been " 3823 "removed from the driver. " 3824 "Hotkeys are always enabled.\n"))) 3825 pr_err("Please remove the hotkey=enable module " 3826 "parameter, it is deprecated. " 3827 "Hotkeys are always enabled.\n"); 3828 } 3829 3830 static int hotkey_write(char *buf) 3831 { 3832 int res; 3833 u32 mask; 3834 char *cmd; 3835 3836 if (!tp_features.hotkey) 3837 return -ENODEV; 3838 3839 if (mutex_lock_killable(&hotkey_mutex)) 3840 return -ERESTARTSYS; 3841 3842 mask = hotkey_user_mask; 3843 3844 res = 0; 3845 while ((cmd = next_cmd(&buf))) { 3846 if (strlencmp(cmd, "enable") == 0) { 3847 hotkey_enabledisable_warn(1); 3848 } else if (strlencmp(cmd, "disable") == 0) { 3849 hotkey_enabledisable_warn(0); 3850 res = -EPERM; 3851 } else if (strlencmp(cmd, "reset") == 0) { 3852 mask = (hotkey_all_mask | hotkey_source_mask) 3853 & ~hotkey_reserved_mask; 3854 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 3855 /* mask set */ 3856 } else if (sscanf(cmd, "%x", &mask) == 1) { 3857 /* mask set */ 3858 } else { 3859 res = -EINVAL; 3860 goto errexit; 3861 } 3862 } 3863 3864 if (!res) { 3865 tpacpi_disclose_usertask("procfs hotkey", 3866 "set mask to 0x%08x\n", mask); 3867 res = hotkey_user_mask_set(mask); 3868 } 3869 3870 errexit: 3871 mutex_unlock(&hotkey_mutex); 3872 return res; 3873 } 3874 3875 static const struct acpi_device_id ibm_htk_device_ids[] = { 3876 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 3877 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 3878 {"", 0}, 3879 }; 3880 3881 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 3882 .hid = ibm_htk_device_ids, 3883 .notify = hotkey_notify, 3884 .handle = &hkey_handle, 3885 .type = ACPI_DEVICE_NOTIFY, 3886 }; 3887 3888 static struct ibm_struct hotkey_driver_data = { 3889 .name = "hotkey", 3890 .read = hotkey_read, 3891 .write = hotkey_write, 3892 .exit = hotkey_exit, 3893 .resume = hotkey_resume, 3894 .suspend = hotkey_suspend, 3895 .acpi = &ibm_hotkey_acpidriver, 3896 }; 3897 3898 /************************************************************************* 3899 * Bluetooth subdriver 3900 */ 3901 3902 enum { 3903 /* ACPI GBDC/SBDC bits */ 3904 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 3905 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 3906 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 3907 0 = disable, 1 = enable */ 3908 }; 3909 3910 enum { 3911 /* ACPI \BLTH commands */ 3912 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 3913 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 3914 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 3915 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 3916 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 3917 }; 3918 3919 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 3920 3921 static int bluetooth_get_status(void) 3922 { 3923 int status; 3924 3925 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3926 if (dbg_bluetoothemul) 3927 return (tpacpi_bluetooth_emulstate) ? 3928 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3929 #endif 3930 3931 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 3932 return -EIO; 3933 3934 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 3935 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3936 } 3937 3938 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 3939 { 3940 int status; 3941 3942 vdbg_printk(TPACPI_DBG_RFKILL, 3943 "will attempt to %s bluetooth\n", 3944 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 3945 3946 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3947 if (dbg_bluetoothemul) { 3948 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 3949 return 0; 3950 } 3951 #endif 3952 3953 if (state == TPACPI_RFK_RADIO_ON) 3954 status = TP_ACPI_BLUETOOTH_RADIOSSW 3955 | TP_ACPI_BLUETOOTH_RESUMECTRL; 3956 else 3957 status = 0; 3958 3959 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 3960 return -EIO; 3961 3962 return 0; 3963 } 3964 3965 /* sysfs bluetooth enable ---------------------------------------------- */ 3966 static ssize_t bluetooth_enable_show(struct device *dev, 3967 struct device_attribute *attr, 3968 char *buf) 3969 { 3970 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 3971 attr, buf); 3972 } 3973 3974 static ssize_t bluetooth_enable_store(struct device *dev, 3975 struct device_attribute *attr, 3976 const char *buf, size_t count) 3977 { 3978 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 3979 attr, buf, count); 3980 } 3981 3982 static struct device_attribute dev_attr_bluetooth_enable = 3983 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO, 3984 bluetooth_enable_show, bluetooth_enable_store); 3985 3986 /* --------------------------------------------------------------------- */ 3987 3988 static struct attribute *bluetooth_attributes[] = { 3989 &dev_attr_bluetooth_enable.attr, 3990 NULL 3991 }; 3992 3993 static const struct attribute_group bluetooth_attr_group = { 3994 .attrs = bluetooth_attributes, 3995 }; 3996 3997 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 3998 .get_status = bluetooth_get_status, 3999 .set_status = bluetooth_set_status, 4000 }; 4001 4002 static void bluetooth_shutdown(void) 4003 { 4004 /* Order firmware to save current state to NVRAM */ 4005 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4006 TP_ACPI_BLTH_SAVE_STATE)) 4007 pr_notice("failed to save bluetooth state to NVRAM\n"); 4008 else 4009 vdbg_printk(TPACPI_DBG_RFKILL, 4010 "bluetooth state saved to NVRAM\n"); 4011 } 4012 4013 static void bluetooth_exit(void) 4014 { 4015 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4016 &bluetooth_attr_group); 4017 4018 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4019 4020 bluetooth_shutdown(); 4021 } 4022 4023 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4024 { 4025 int res; 4026 int status = 0; 4027 4028 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4029 "initializing bluetooth subdriver\n"); 4030 4031 TPACPI_ACPIHANDLE_INIT(hkey); 4032 4033 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4034 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4035 tp_features.bluetooth = hkey_handle && 4036 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4037 4038 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4039 "bluetooth is %s, status 0x%02x\n", 4040 str_supported(tp_features.bluetooth), 4041 status); 4042 4043 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4044 if (dbg_bluetoothemul) { 4045 tp_features.bluetooth = 1; 4046 pr_info("bluetooth switch emulation enabled\n"); 4047 } else 4048 #endif 4049 if (tp_features.bluetooth && 4050 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4051 /* no bluetooth hardware present in system */ 4052 tp_features.bluetooth = 0; 4053 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4054 "bluetooth hardware not installed\n"); 4055 } 4056 4057 if (!tp_features.bluetooth) 4058 return 1; 4059 4060 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4061 &bluetooth_tprfk_ops, 4062 RFKILL_TYPE_BLUETOOTH, 4063 TPACPI_RFK_BLUETOOTH_SW_NAME, 4064 true); 4065 if (res) 4066 return res; 4067 4068 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4069 &bluetooth_attr_group); 4070 if (res) { 4071 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4072 return res; 4073 } 4074 4075 return 0; 4076 } 4077 4078 /* procfs -------------------------------------------------------------- */ 4079 static int bluetooth_read(struct seq_file *m) 4080 { 4081 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4082 } 4083 4084 static int bluetooth_write(char *buf) 4085 { 4086 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4087 } 4088 4089 static struct ibm_struct bluetooth_driver_data = { 4090 .name = "bluetooth", 4091 .read = bluetooth_read, 4092 .write = bluetooth_write, 4093 .exit = bluetooth_exit, 4094 .shutdown = bluetooth_shutdown, 4095 }; 4096 4097 /************************************************************************* 4098 * Wan subdriver 4099 */ 4100 4101 enum { 4102 /* ACPI GWAN/SWAN bits */ 4103 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4104 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4105 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4106 0 = disable, 1 = enable */ 4107 }; 4108 4109 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4110 4111 static int wan_get_status(void) 4112 { 4113 int status; 4114 4115 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4116 if (dbg_wwanemul) 4117 return (tpacpi_wwan_emulstate) ? 4118 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4119 #endif 4120 4121 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4122 return -EIO; 4123 4124 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4125 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4126 } 4127 4128 static int wan_set_status(enum tpacpi_rfkill_state state) 4129 { 4130 int status; 4131 4132 vdbg_printk(TPACPI_DBG_RFKILL, 4133 "will attempt to %s wwan\n", 4134 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4135 4136 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4137 if (dbg_wwanemul) { 4138 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4139 return 0; 4140 } 4141 #endif 4142 4143 if (state == TPACPI_RFK_RADIO_ON) 4144 status = TP_ACPI_WANCARD_RADIOSSW 4145 | TP_ACPI_WANCARD_RESUMECTRL; 4146 else 4147 status = 0; 4148 4149 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4150 return -EIO; 4151 4152 return 0; 4153 } 4154 4155 /* sysfs wan enable ---------------------------------------------------- */ 4156 static ssize_t wan_enable_show(struct device *dev, 4157 struct device_attribute *attr, 4158 char *buf) 4159 { 4160 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4161 attr, buf); 4162 } 4163 4164 static ssize_t wan_enable_store(struct device *dev, 4165 struct device_attribute *attr, 4166 const char *buf, size_t count) 4167 { 4168 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4169 attr, buf, count); 4170 } 4171 4172 static struct device_attribute dev_attr_wan_enable = 4173 __ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4174 wan_enable_show, wan_enable_store); 4175 4176 /* --------------------------------------------------------------------- */ 4177 4178 static struct attribute *wan_attributes[] = { 4179 &dev_attr_wan_enable.attr, 4180 NULL 4181 }; 4182 4183 static const struct attribute_group wan_attr_group = { 4184 .attrs = wan_attributes, 4185 }; 4186 4187 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4188 .get_status = wan_get_status, 4189 .set_status = wan_set_status, 4190 }; 4191 4192 static void wan_shutdown(void) 4193 { 4194 /* Order firmware to save current state to NVRAM */ 4195 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4196 TP_ACPI_WGSV_SAVE_STATE)) 4197 pr_notice("failed to save WWAN state to NVRAM\n"); 4198 else 4199 vdbg_printk(TPACPI_DBG_RFKILL, 4200 "WWAN state saved to NVRAM\n"); 4201 } 4202 4203 static void wan_exit(void) 4204 { 4205 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4206 &wan_attr_group); 4207 4208 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4209 4210 wan_shutdown(); 4211 } 4212 4213 static int __init wan_init(struct ibm_init_struct *iibm) 4214 { 4215 int res; 4216 int status = 0; 4217 4218 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4219 "initializing wan subdriver\n"); 4220 4221 TPACPI_ACPIHANDLE_INIT(hkey); 4222 4223 tp_features.wan = hkey_handle && 4224 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4225 4226 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4227 "wan is %s, status 0x%02x\n", 4228 str_supported(tp_features.wan), 4229 status); 4230 4231 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4232 if (dbg_wwanemul) { 4233 tp_features.wan = 1; 4234 pr_info("wwan switch emulation enabled\n"); 4235 } else 4236 #endif 4237 if (tp_features.wan && 4238 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4239 /* no wan hardware present in system */ 4240 tp_features.wan = 0; 4241 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4242 "wan hardware not installed\n"); 4243 } 4244 4245 if (!tp_features.wan) 4246 return 1; 4247 4248 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4249 &wan_tprfk_ops, 4250 RFKILL_TYPE_WWAN, 4251 TPACPI_RFK_WWAN_SW_NAME, 4252 true); 4253 if (res) 4254 return res; 4255 4256 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4257 &wan_attr_group); 4258 4259 if (res) { 4260 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4261 return res; 4262 } 4263 4264 return 0; 4265 } 4266 4267 /* procfs -------------------------------------------------------------- */ 4268 static int wan_read(struct seq_file *m) 4269 { 4270 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4271 } 4272 4273 static int wan_write(char *buf) 4274 { 4275 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4276 } 4277 4278 static struct ibm_struct wan_driver_data = { 4279 .name = "wan", 4280 .read = wan_read, 4281 .write = wan_write, 4282 .exit = wan_exit, 4283 .shutdown = wan_shutdown, 4284 }; 4285 4286 /************************************************************************* 4287 * UWB subdriver 4288 */ 4289 4290 enum { 4291 /* ACPI GUWB/SUWB bits */ 4292 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4293 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4294 }; 4295 4296 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4297 4298 static int uwb_get_status(void) 4299 { 4300 int status; 4301 4302 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4303 if (dbg_uwbemul) 4304 return (tpacpi_uwb_emulstate) ? 4305 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4306 #endif 4307 4308 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4309 return -EIO; 4310 4311 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4312 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4313 } 4314 4315 static int uwb_set_status(enum tpacpi_rfkill_state state) 4316 { 4317 int status; 4318 4319 vdbg_printk(TPACPI_DBG_RFKILL, 4320 "will attempt to %s UWB\n", 4321 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4322 4323 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4324 if (dbg_uwbemul) { 4325 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4326 return 0; 4327 } 4328 #endif 4329 4330 if (state == TPACPI_RFK_RADIO_ON) 4331 status = TP_ACPI_UWB_RADIOSSW; 4332 else 4333 status = 0; 4334 4335 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4336 return -EIO; 4337 4338 return 0; 4339 } 4340 4341 /* --------------------------------------------------------------------- */ 4342 4343 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4344 .get_status = uwb_get_status, 4345 .set_status = uwb_set_status, 4346 }; 4347 4348 static void uwb_exit(void) 4349 { 4350 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4351 } 4352 4353 static int __init uwb_init(struct ibm_init_struct *iibm) 4354 { 4355 int res; 4356 int status = 0; 4357 4358 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4359 "initializing uwb subdriver\n"); 4360 4361 TPACPI_ACPIHANDLE_INIT(hkey); 4362 4363 tp_features.uwb = hkey_handle && 4364 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4365 4366 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4367 "uwb is %s, status 0x%02x\n", 4368 str_supported(tp_features.uwb), 4369 status); 4370 4371 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4372 if (dbg_uwbemul) { 4373 tp_features.uwb = 1; 4374 pr_info("uwb switch emulation enabled\n"); 4375 } else 4376 #endif 4377 if (tp_features.uwb && 4378 !(status & TP_ACPI_UWB_HWPRESENT)) { 4379 /* no uwb hardware present in system */ 4380 tp_features.uwb = 0; 4381 dbg_printk(TPACPI_DBG_INIT, 4382 "uwb hardware not installed\n"); 4383 } 4384 4385 if (!tp_features.uwb) 4386 return 1; 4387 4388 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4389 &uwb_tprfk_ops, 4390 RFKILL_TYPE_UWB, 4391 TPACPI_RFK_UWB_SW_NAME, 4392 false); 4393 return res; 4394 } 4395 4396 static struct ibm_struct uwb_driver_data = { 4397 .name = "uwb", 4398 .exit = uwb_exit, 4399 .flags.experimental = 1, 4400 }; 4401 4402 /************************************************************************* 4403 * Video subdriver 4404 */ 4405 4406 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4407 4408 enum video_access_mode { 4409 TPACPI_VIDEO_NONE = 0, 4410 TPACPI_VIDEO_570, /* 570 */ 4411 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4412 TPACPI_VIDEO_NEW, /* all others */ 4413 }; 4414 4415 enum { /* video status flags, based on VIDEO_570 */ 4416 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4417 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4418 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4419 }; 4420 4421 enum { /* TPACPI_VIDEO_570 constants */ 4422 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4423 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4424 * video_status_flags */ 4425 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4426 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4427 }; 4428 4429 static enum video_access_mode video_supported; 4430 static int video_orig_autosw; 4431 4432 static int video_autosw_get(void); 4433 static int video_autosw_set(int enable); 4434 4435 TPACPI_HANDLE(vid, root, 4436 "\\_SB.PCI.AGP.VGA", /* 570 */ 4437 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4438 "\\_SB.PCI0.VID0", /* 770e */ 4439 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4440 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4441 "\\_SB.PCI0.AGP.VID", /* all others */ 4442 ); /* R30, R31 */ 4443 4444 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4445 4446 static int __init video_init(struct ibm_init_struct *iibm) 4447 { 4448 int ivga; 4449 4450 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4451 4452 TPACPI_ACPIHANDLE_INIT(vid); 4453 if (tpacpi_is_ibm()) 4454 TPACPI_ACPIHANDLE_INIT(vid2); 4455 4456 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4457 /* G41, assume IVGA doesn't change */ 4458 vid_handle = vid2_handle; 4459 4460 if (!vid_handle) 4461 /* video switching not supported on R30, R31 */ 4462 video_supported = TPACPI_VIDEO_NONE; 4463 else if (tpacpi_is_ibm() && 4464 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4465 /* 570 */ 4466 video_supported = TPACPI_VIDEO_570; 4467 else if (tpacpi_is_ibm() && 4468 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4469 /* 600e/x, 770e, 770x */ 4470 video_supported = TPACPI_VIDEO_770; 4471 else 4472 /* all others */ 4473 video_supported = TPACPI_VIDEO_NEW; 4474 4475 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4476 str_supported(video_supported != TPACPI_VIDEO_NONE), 4477 video_supported); 4478 4479 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1; 4480 } 4481 4482 static void video_exit(void) 4483 { 4484 dbg_printk(TPACPI_DBG_EXIT, 4485 "restoring original video autoswitch mode\n"); 4486 if (video_autosw_set(video_orig_autosw)) 4487 pr_err("error while trying to restore original " 4488 "video autoswitch mode\n"); 4489 } 4490 4491 static int video_outputsw_get(void) 4492 { 4493 int status = 0; 4494 int i; 4495 4496 switch (video_supported) { 4497 case TPACPI_VIDEO_570: 4498 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4499 TP_ACPI_VIDEO_570_PHSCMD)) 4500 return -EIO; 4501 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4502 break; 4503 case TPACPI_VIDEO_770: 4504 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4505 return -EIO; 4506 if (i) 4507 status |= TP_ACPI_VIDEO_S_LCD; 4508 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4509 return -EIO; 4510 if (i) 4511 status |= TP_ACPI_VIDEO_S_CRT; 4512 break; 4513 case TPACPI_VIDEO_NEW: 4514 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4515 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4516 return -EIO; 4517 if (i) 4518 status |= TP_ACPI_VIDEO_S_CRT; 4519 4520 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4521 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4522 return -EIO; 4523 if (i) 4524 status |= TP_ACPI_VIDEO_S_LCD; 4525 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4526 return -EIO; 4527 if (i) 4528 status |= TP_ACPI_VIDEO_S_DVI; 4529 break; 4530 default: 4531 return -ENOSYS; 4532 } 4533 4534 return status; 4535 } 4536 4537 static int video_outputsw_set(int status) 4538 { 4539 int autosw; 4540 int res = 0; 4541 4542 switch (video_supported) { 4543 case TPACPI_VIDEO_570: 4544 res = acpi_evalf(NULL, NULL, 4545 "\\_SB.PHS2", "vdd", 4546 TP_ACPI_VIDEO_570_PHS2CMD, 4547 status | TP_ACPI_VIDEO_570_PHS2SET); 4548 break; 4549 case TPACPI_VIDEO_770: 4550 autosw = video_autosw_get(); 4551 if (autosw < 0) 4552 return autosw; 4553 4554 res = video_autosw_set(1); 4555 if (res) 4556 return res; 4557 res = acpi_evalf(vid_handle, NULL, 4558 "ASWT", "vdd", status * 0x100, 0); 4559 if (!autosw && video_autosw_set(autosw)) { 4560 pr_err("video auto-switch left enabled due to error\n"); 4561 return -EIO; 4562 } 4563 break; 4564 case TPACPI_VIDEO_NEW: 4565 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4566 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4567 break; 4568 default: 4569 return -ENOSYS; 4570 } 4571 4572 return (res)? 0 : -EIO; 4573 } 4574 4575 static int video_autosw_get(void) 4576 { 4577 int autosw = 0; 4578 4579 switch (video_supported) { 4580 case TPACPI_VIDEO_570: 4581 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4582 return -EIO; 4583 break; 4584 case TPACPI_VIDEO_770: 4585 case TPACPI_VIDEO_NEW: 4586 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4587 return -EIO; 4588 break; 4589 default: 4590 return -ENOSYS; 4591 } 4592 4593 return autosw & 1; 4594 } 4595 4596 static int video_autosw_set(int enable) 4597 { 4598 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0)) 4599 return -EIO; 4600 return 0; 4601 } 4602 4603 static int video_outputsw_cycle(void) 4604 { 4605 int autosw = video_autosw_get(); 4606 int res; 4607 4608 if (autosw < 0) 4609 return autosw; 4610 4611 switch (video_supported) { 4612 case TPACPI_VIDEO_570: 4613 res = video_autosw_set(1); 4614 if (res) 4615 return res; 4616 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4617 break; 4618 case TPACPI_VIDEO_770: 4619 case TPACPI_VIDEO_NEW: 4620 res = video_autosw_set(1); 4621 if (res) 4622 return res; 4623 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4624 break; 4625 default: 4626 return -ENOSYS; 4627 } 4628 if (!autosw && video_autosw_set(autosw)) { 4629 pr_err("video auto-switch left enabled due to error\n"); 4630 return -EIO; 4631 } 4632 4633 return (res)? 0 : -EIO; 4634 } 4635 4636 static int video_expand_toggle(void) 4637 { 4638 switch (video_supported) { 4639 case TPACPI_VIDEO_570: 4640 return acpi_evalf(ec_handle, NULL, "_Q17", "v")? 4641 0 : -EIO; 4642 case TPACPI_VIDEO_770: 4643 return acpi_evalf(vid_handle, NULL, "VEXP", "v")? 4644 0 : -EIO; 4645 case TPACPI_VIDEO_NEW: 4646 return acpi_evalf(NULL, NULL, "\\VEXP", "v")? 4647 0 : -EIO; 4648 default: 4649 return -ENOSYS; 4650 } 4651 /* not reached */ 4652 } 4653 4654 static int video_read(struct seq_file *m) 4655 { 4656 int status, autosw; 4657 4658 if (video_supported == TPACPI_VIDEO_NONE) { 4659 seq_printf(m, "status:\t\tnot supported\n"); 4660 return 0; 4661 } 4662 4663 /* Even reads can crash X.org, so... */ 4664 if (!capable(CAP_SYS_ADMIN)) 4665 return -EPERM; 4666 4667 status = video_outputsw_get(); 4668 if (status < 0) 4669 return status; 4670 4671 autosw = video_autosw_get(); 4672 if (autosw < 0) 4673 return autosw; 4674 4675 seq_printf(m, "status:\t\tsupported\n"); 4676 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4677 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4678 if (video_supported == TPACPI_VIDEO_NEW) 4679 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 4680 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 4681 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 4682 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 4683 if (video_supported == TPACPI_VIDEO_NEW) 4684 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 4685 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 4686 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 4687 4688 return 0; 4689 } 4690 4691 static int video_write(char *buf) 4692 { 4693 char *cmd; 4694 int enable, disable, status; 4695 int res; 4696 4697 if (video_supported == TPACPI_VIDEO_NONE) 4698 return -ENODEV; 4699 4700 /* Even reads can crash X.org, let alone writes... */ 4701 if (!capable(CAP_SYS_ADMIN)) 4702 return -EPERM; 4703 4704 enable = 0; 4705 disable = 0; 4706 4707 while ((cmd = next_cmd(&buf))) { 4708 if (strlencmp(cmd, "lcd_enable") == 0) { 4709 enable |= TP_ACPI_VIDEO_S_LCD; 4710 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4711 disable |= TP_ACPI_VIDEO_S_LCD; 4712 } else if (strlencmp(cmd, "crt_enable") == 0) { 4713 enable |= TP_ACPI_VIDEO_S_CRT; 4714 } else if (strlencmp(cmd, "crt_disable") == 0) { 4715 disable |= TP_ACPI_VIDEO_S_CRT; 4716 } else if (video_supported == TPACPI_VIDEO_NEW && 4717 strlencmp(cmd, "dvi_enable") == 0) { 4718 enable |= TP_ACPI_VIDEO_S_DVI; 4719 } else if (video_supported == TPACPI_VIDEO_NEW && 4720 strlencmp(cmd, "dvi_disable") == 0) { 4721 disable |= TP_ACPI_VIDEO_S_DVI; 4722 } else if (strlencmp(cmd, "auto_enable") == 0) { 4723 res = video_autosw_set(1); 4724 if (res) 4725 return res; 4726 } else if (strlencmp(cmd, "auto_disable") == 0) { 4727 res = video_autosw_set(0); 4728 if (res) 4729 return res; 4730 } else if (strlencmp(cmd, "video_switch") == 0) { 4731 res = video_outputsw_cycle(); 4732 if (res) 4733 return res; 4734 } else if (strlencmp(cmd, "expand_toggle") == 0) { 4735 res = video_expand_toggle(); 4736 if (res) 4737 return res; 4738 } else 4739 return -EINVAL; 4740 } 4741 4742 if (enable || disable) { 4743 status = video_outputsw_get(); 4744 if (status < 0) 4745 return status; 4746 res = video_outputsw_set((status & ~disable) | enable); 4747 if (res) 4748 return res; 4749 } 4750 4751 return 0; 4752 } 4753 4754 static struct ibm_struct video_driver_data = { 4755 .name = "video", 4756 .read = video_read, 4757 .write = video_write, 4758 .exit = video_exit, 4759 }; 4760 4761 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 4762 4763 /************************************************************************* 4764 * Light (thinklight) subdriver 4765 */ 4766 4767 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 4768 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 4769 4770 static int light_get_status(void) 4771 { 4772 int status = 0; 4773 4774 if (tp_features.light_status) { 4775 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 4776 return -EIO; 4777 return (!!status); 4778 } 4779 4780 return -ENXIO; 4781 } 4782 4783 static int light_set_status(int status) 4784 { 4785 int rc; 4786 4787 if (tp_features.light) { 4788 if (cmos_handle) { 4789 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 4790 (status)? 4791 TP_CMOS_THINKLIGHT_ON : 4792 TP_CMOS_THINKLIGHT_OFF); 4793 } else { 4794 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 4795 (status)? 1 : 0); 4796 } 4797 return (rc)? 0 : -EIO; 4798 } 4799 4800 return -ENXIO; 4801 } 4802 4803 static void light_set_status_worker(struct work_struct *work) 4804 { 4805 struct tpacpi_led_classdev *data = 4806 container_of(work, struct tpacpi_led_classdev, work); 4807 4808 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 4809 light_set_status((data->new_state != TPACPI_LED_OFF)); 4810 } 4811 4812 static void light_sysfs_set(struct led_classdev *led_cdev, 4813 enum led_brightness brightness) 4814 { 4815 struct tpacpi_led_classdev *data = 4816 container_of(led_cdev, 4817 struct tpacpi_led_classdev, 4818 led_classdev); 4819 data->new_state = (brightness != LED_OFF) ? 4820 TPACPI_LED_ON : TPACPI_LED_OFF; 4821 queue_work(tpacpi_wq, &data->work); 4822 } 4823 4824 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 4825 { 4826 return (light_get_status() == 1)? LED_FULL : LED_OFF; 4827 } 4828 4829 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 4830 .led_classdev = { 4831 .name = "tpacpi::thinklight", 4832 .brightness_set = &light_sysfs_set, 4833 .brightness_get = &light_sysfs_get, 4834 } 4835 }; 4836 4837 static int __init light_init(struct ibm_init_struct *iibm) 4838 { 4839 int rc; 4840 4841 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 4842 4843 if (tpacpi_is_ibm()) { 4844 TPACPI_ACPIHANDLE_INIT(ledb); 4845 TPACPI_ACPIHANDLE_INIT(lght); 4846 } 4847 TPACPI_ACPIHANDLE_INIT(cmos); 4848 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 4849 4850 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 4851 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 4852 4853 if (tp_features.light) 4854 /* light status not supported on 4855 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 4856 tp_features.light_status = 4857 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 4858 4859 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 4860 str_supported(tp_features.light), 4861 str_supported(tp_features.light_status)); 4862 4863 if (!tp_features.light) 4864 return 1; 4865 4866 rc = led_classdev_register(&tpacpi_pdev->dev, 4867 &tpacpi_led_thinklight.led_classdev); 4868 4869 if (rc < 0) { 4870 tp_features.light = 0; 4871 tp_features.light_status = 0; 4872 } else { 4873 rc = 0; 4874 } 4875 4876 return rc; 4877 } 4878 4879 static void light_exit(void) 4880 { 4881 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 4882 if (work_pending(&tpacpi_led_thinklight.work)) 4883 flush_workqueue(tpacpi_wq); 4884 } 4885 4886 static int light_read(struct seq_file *m) 4887 { 4888 int status; 4889 4890 if (!tp_features.light) { 4891 seq_printf(m, "status:\t\tnot supported\n"); 4892 } else if (!tp_features.light_status) { 4893 seq_printf(m, "status:\t\tunknown\n"); 4894 seq_printf(m, "commands:\ton, off\n"); 4895 } else { 4896 status = light_get_status(); 4897 if (status < 0) 4898 return status; 4899 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 4900 seq_printf(m, "commands:\ton, off\n"); 4901 } 4902 4903 return 0; 4904 } 4905 4906 static int light_write(char *buf) 4907 { 4908 char *cmd; 4909 int newstatus = 0; 4910 4911 if (!tp_features.light) 4912 return -ENODEV; 4913 4914 while ((cmd = next_cmd(&buf))) { 4915 if (strlencmp(cmd, "on") == 0) { 4916 newstatus = 1; 4917 } else if (strlencmp(cmd, "off") == 0) { 4918 newstatus = 0; 4919 } else 4920 return -EINVAL; 4921 } 4922 4923 return light_set_status(newstatus); 4924 } 4925 4926 static struct ibm_struct light_driver_data = { 4927 .name = "light", 4928 .read = light_read, 4929 .write = light_write, 4930 .exit = light_exit, 4931 }; 4932 4933 /************************************************************************* 4934 * CMOS subdriver 4935 */ 4936 4937 /* sysfs cmos_command -------------------------------------------------- */ 4938 static ssize_t cmos_command_store(struct device *dev, 4939 struct device_attribute *attr, 4940 const char *buf, size_t count) 4941 { 4942 unsigned long cmos_cmd; 4943 int res; 4944 4945 if (parse_strtoul(buf, 21, &cmos_cmd)) 4946 return -EINVAL; 4947 4948 res = issue_thinkpad_cmos_command(cmos_cmd); 4949 return (res)? res : count; 4950 } 4951 4952 static struct device_attribute dev_attr_cmos_command = 4953 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store); 4954 4955 /* --------------------------------------------------------------------- */ 4956 4957 static int __init cmos_init(struct ibm_init_struct *iibm) 4958 { 4959 int res; 4960 4961 vdbg_printk(TPACPI_DBG_INIT, 4962 "initializing cmos commands subdriver\n"); 4963 4964 TPACPI_ACPIHANDLE_INIT(cmos); 4965 4966 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 4967 str_supported(cmos_handle != NULL)); 4968 4969 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4970 if (res) 4971 return res; 4972 4973 return (cmos_handle)? 0 : 1; 4974 } 4975 4976 static void cmos_exit(void) 4977 { 4978 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4979 } 4980 4981 static int cmos_read(struct seq_file *m) 4982 { 4983 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4984 R30, R31, T20-22, X20-21 */ 4985 if (!cmos_handle) 4986 seq_printf(m, "status:\t\tnot supported\n"); 4987 else { 4988 seq_printf(m, "status:\t\tsupported\n"); 4989 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 4990 } 4991 4992 return 0; 4993 } 4994 4995 static int cmos_write(char *buf) 4996 { 4997 char *cmd; 4998 int cmos_cmd, res; 4999 5000 while ((cmd = next_cmd(&buf))) { 5001 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5002 cmos_cmd >= 0 && cmos_cmd <= 21) { 5003 /* cmos_cmd set */ 5004 } else 5005 return -EINVAL; 5006 5007 res = issue_thinkpad_cmos_command(cmos_cmd); 5008 if (res) 5009 return res; 5010 } 5011 5012 return 0; 5013 } 5014 5015 static struct ibm_struct cmos_driver_data = { 5016 .name = "cmos", 5017 .read = cmos_read, 5018 .write = cmos_write, 5019 .exit = cmos_exit, 5020 }; 5021 5022 /************************************************************************* 5023 * LED subdriver 5024 */ 5025 5026 enum led_access_mode { 5027 TPACPI_LED_NONE = 0, 5028 TPACPI_LED_570, /* 570 */ 5029 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5030 TPACPI_LED_NEW, /* all others */ 5031 }; 5032 5033 enum { /* For TPACPI_LED_OLD */ 5034 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5035 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5036 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5037 }; 5038 5039 static enum led_access_mode led_supported; 5040 5041 static acpi_handle led_handle; 5042 5043 #define TPACPI_LED_NUMLEDS 16 5044 static struct tpacpi_led_classdev *tpacpi_leds; 5045 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5046 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5047 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5048 "tpacpi::power", 5049 "tpacpi:orange:batt", 5050 "tpacpi:green:batt", 5051 "tpacpi::dock_active", 5052 "tpacpi::bay_active", 5053 "tpacpi::dock_batt", 5054 "tpacpi::unknown_led", 5055 "tpacpi::standby", 5056 "tpacpi::dock_status1", 5057 "tpacpi::dock_status2", 5058 "tpacpi::unknown_led2", 5059 "tpacpi::unknown_led3", 5060 "tpacpi::thinkvantage", 5061 }; 5062 #define TPACPI_SAFE_LEDS 0x1081U 5063 5064 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5065 { 5066 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5067 return false; 5068 #else 5069 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5070 #endif 5071 } 5072 5073 static int led_get_status(const unsigned int led) 5074 { 5075 int status; 5076 enum led_status_t led_s; 5077 5078 switch (led_supported) { 5079 case TPACPI_LED_570: 5080 if (!acpi_evalf(ec_handle, 5081 &status, "GLED", "dd", 1 << led)) 5082 return -EIO; 5083 led_s = (status == 0)? 5084 TPACPI_LED_OFF : 5085 ((status == 1)? 5086 TPACPI_LED_ON : 5087 TPACPI_LED_BLINK); 5088 tpacpi_led_state_cache[led] = led_s; 5089 return led_s; 5090 default: 5091 return -ENXIO; 5092 } 5093 5094 /* not reached */ 5095 } 5096 5097 static int led_set_status(const unsigned int led, 5098 const enum led_status_t ledstatus) 5099 { 5100 /* off, on, blink. Index is led_status_t */ 5101 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5102 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5103 5104 int rc = 0; 5105 5106 switch (led_supported) { 5107 case TPACPI_LED_570: 5108 /* 570 */ 5109 if (unlikely(led > 7)) 5110 return -EINVAL; 5111 if (unlikely(tpacpi_is_led_restricted(led))) 5112 return -EPERM; 5113 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5114 (1 << led), led_sled_arg1[ledstatus])) 5115 rc = -EIO; 5116 break; 5117 case TPACPI_LED_OLD: 5118 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5119 if (unlikely(led > 7)) 5120 return -EINVAL; 5121 if (unlikely(tpacpi_is_led_restricted(led))) 5122 return -EPERM; 5123 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5124 if (rc >= 0) 5125 rc = ec_write(TPACPI_LED_EC_HLBL, 5126 (ledstatus == TPACPI_LED_BLINK) << led); 5127 if (rc >= 0) 5128 rc = ec_write(TPACPI_LED_EC_HLCL, 5129 (ledstatus != TPACPI_LED_OFF) << led); 5130 break; 5131 case TPACPI_LED_NEW: 5132 /* all others */ 5133 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5134 return -EINVAL; 5135 if (unlikely(tpacpi_is_led_restricted(led))) 5136 return -EPERM; 5137 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5138 led, led_led_arg1[ledstatus])) 5139 rc = -EIO; 5140 break; 5141 default: 5142 rc = -ENXIO; 5143 } 5144 5145 if (!rc) 5146 tpacpi_led_state_cache[led] = ledstatus; 5147 5148 return rc; 5149 } 5150 5151 static void led_set_status_worker(struct work_struct *work) 5152 { 5153 struct tpacpi_led_classdev *data = 5154 container_of(work, struct tpacpi_led_classdev, work); 5155 5156 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5157 led_set_status(data->led, data->new_state); 5158 } 5159 5160 static void led_sysfs_set(struct led_classdev *led_cdev, 5161 enum led_brightness brightness) 5162 { 5163 struct tpacpi_led_classdev *data = container_of(led_cdev, 5164 struct tpacpi_led_classdev, led_classdev); 5165 5166 if (brightness == LED_OFF) 5167 data->new_state = TPACPI_LED_OFF; 5168 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5169 data->new_state = TPACPI_LED_ON; 5170 else 5171 data->new_state = TPACPI_LED_BLINK; 5172 5173 queue_work(tpacpi_wq, &data->work); 5174 } 5175 5176 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5177 unsigned long *delay_on, unsigned long *delay_off) 5178 { 5179 struct tpacpi_led_classdev *data = container_of(led_cdev, 5180 struct tpacpi_led_classdev, led_classdev); 5181 5182 /* Can we choose the flash rate? */ 5183 if (*delay_on == 0 && *delay_off == 0) { 5184 /* yes. set them to the hardware blink rate (1 Hz) */ 5185 *delay_on = 500; /* ms */ 5186 *delay_off = 500; /* ms */ 5187 } else if ((*delay_on != 500) || (*delay_off != 500)) 5188 return -EINVAL; 5189 5190 data->new_state = TPACPI_LED_BLINK; 5191 queue_work(tpacpi_wq, &data->work); 5192 5193 return 0; 5194 } 5195 5196 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5197 { 5198 int rc; 5199 5200 struct tpacpi_led_classdev *data = container_of(led_cdev, 5201 struct tpacpi_led_classdev, led_classdev); 5202 5203 rc = led_get_status(data->led); 5204 5205 if (rc == TPACPI_LED_OFF || rc < 0) 5206 rc = LED_OFF; /* no error handling in led class :( */ 5207 else 5208 rc = LED_FULL; 5209 5210 return rc; 5211 } 5212 5213 static void led_exit(void) 5214 { 5215 unsigned int i; 5216 5217 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5218 if (tpacpi_leds[i].led_classdev.name) 5219 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5220 } 5221 5222 kfree(tpacpi_leds); 5223 } 5224 5225 static int __init tpacpi_init_led(unsigned int led) 5226 { 5227 int rc; 5228 5229 tpacpi_leds[led].led = led; 5230 5231 /* LEDs with no name don't get registered */ 5232 if (!tpacpi_led_names[led]) 5233 return 0; 5234 5235 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5236 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5237 if (led_supported == TPACPI_LED_570) 5238 tpacpi_leds[led].led_classdev.brightness_get = 5239 &led_sysfs_get; 5240 5241 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5242 5243 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5244 5245 rc = led_classdev_register(&tpacpi_pdev->dev, 5246 &tpacpi_leds[led].led_classdev); 5247 if (rc < 0) 5248 tpacpi_leds[led].led_classdev.name = NULL; 5249 5250 return rc; 5251 } 5252 5253 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5254 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5255 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5256 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5257 5258 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5259 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5260 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5261 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5262 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5263 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5264 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5265 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5266 5267 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5268 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5269 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5270 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5271 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5272 5273 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5274 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5275 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5276 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5277 5278 /* (1) - may have excess leds enabled on MSB */ 5279 5280 /* Defaults (order matters, keep last, don't reorder!) */ 5281 { /* Lenovo */ 5282 .vendor = PCI_VENDOR_ID_LENOVO, 5283 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5284 .quirks = 0x1fffU, 5285 }, 5286 { /* IBM ThinkPads with no EC version string */ 5287 .vendor = PCI_VENDOR_ID_IBM, 5288 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5289 .quirks = 0x00ffU, 5290 }, 5291 { /* IBM ThinkPads with EC version string */ 5292 .vendor = PCI_VENDOR_ID_IBM, 5293 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5294 .quirks = 0x00bfU, 5295 }, 5296 }; 5297 5298 #undef TPACPI_LEDQ_IBM 5299 #undef TPACPI_LEDQ_LNV 5300 5301 static enum led_access_mode __init led_init_detect_mode(void) 5302 { 5303 acpi_status status; 5304 5305 if (tpacpi_is_ibm()) { 5306 /* 570 */ 5307 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5308 if (ACPI_SUCCESS(status)) 5309 return TPACPI_LED_570; 5310 5311 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5312 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5313 if (ACPI_SUCCESS(status)) 5314 return TPACPI_LED_OLD; 5315 } 5316 5317 /* most others */ 5318 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5319 if (ACPI_SUCCESS(status)) 5320 return TPACPI_LED_NEW; 5321 5322 /* R30, R31, and unknown firmwares */ 5323 led_handle = NULL; 5324 return TPACPI_LED_NONE; 5325 } 5326 5327 static int __init led_init(struct ibm_init_struct *iibm) 5328 { 5329 unsigned int i; 5330 int rc; 5331 unsigned long useful_leds; 5332 5333 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5334 5335 led_supported = led_init_detect_mode(); 5336 5337 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5338 str_supported(led_supported), led_supported); 5339 5340 if (led_supported == TPACPI_LED_NONE) 5341 return 1; 5342 5343 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5344 GFP_KERNEL); 5345 if (!tpacpi_leds) { 5346 pr_err("Out of memory for LED data\n"); 5347 return -ENOMEM; 5348 } 5349 5350 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5351 ARRAY_SIZE(led_useful_qtable)); 5352 5353 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5354 if (!tpacpi_is_led_restricted(i) && 5355 test_bit(i, &useful_leds)) { 5356 rc = tpacpi_init_led(i); 5357 if (rc < 0) { 5358 led_exit(); 5359 return rc; 5360 } 5361 } 5362 } 5363 5364 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5365 pr_notice("warning: userspace override of important " 5366 "firmware LEDs is enabled\n"); 5367 #endif 5368 return 0; 5369 } 5370 5371 #define str_led_status(s) \ 5372 ((s) == TPACPI_LED_OFF ? "off" : \ 5373 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5374 5375 static int led_read(struct seq_file *m) 5376 { 5377 if (!led_supported) { 5378 seq_printf(m, "status:\t\tnot supported\n"); 5379 return 0; 5380 } 5381 seq_printf(m, "status:\t\tsupported\n"); 5382 5383 if (led_supported == TPACPI_LED_570) { 5384 /* 570 */ 5385 int i, status; 5386 for (i = 0; i < 8; i++) { 5387 status = led_get_status(i); 5388 if (status < 0) 5389 return -EIO; 5390 seq_printf(m, "%d:\t\t%s\n", 5391 i, str_led_status(status)); 5392 } 5393 } 5394 5395 seq_printf(m, "commands:\t" 5396 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5397 5398 return 0; 5399 } 5400 5401 static int led_write(char *buf) 5402 { 5403 char *cmd; 5404 int led, rc; 5405 enum led_status_t s; 5406 5407 if (!led_supported) 5408 return -ENODEV; 5409 5410 while ((cmd = next_cmd(&buf))) { 5411 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15) 5412 return -EINVAL; 5413 5414 if (strstr(cmd, "off")) { 5415 s = TPACPI_LED_OFF; 5416 } else if (strstr(cmd, "on")) { 5417 s = TPACPI_LED_ON; 5418 } else if (strstr(cmd, "blink")) { 5419 s = TPACPI_LED_BLINK; 5420 } else { 5421 return -EINVAL; 5422 } 5423 5424 rc = led_set_status(led, s); 5425 if (rc < 0) 5426 return rc; 5427 } 5428 5429 return 0; 5430 } 5431 5432 static struct ibm_struct led_driver_data = { 5433 .name = "led", 5434 .read = led_read, 5435 .write = led_write, 5436 .exit = led_exit, 5437 }; 5438 5439 /************************************************************************* 5440 * Beep subdriver 5441 */ 5442 5443 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5444 5445 #define TPACPI_BEEP_Q1 0x0001 5446 5447 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5448 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5449 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5450 }; 5451 5452 static int __init beep_init(struct ibm_init_struct *iibm) 5453 { 5454 unsigned long quirks; 5455 5456 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5457 5458 TPACPI_ACPIHANDLE_INIT(beep); 5459 5460 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5461 str_supported(beep_handle != NULL)); 5462 5463 quirks = tpacpi_check_quirks(beep_quirk_table, 5464 ARRAY_SIZE(beep_quirk_table)); 5465 5466 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5467 5468 return (beep_handle)? 0 : 1; 5469 } 5470 5471 static int beep_read(struct seq_file *m) 5472 { 5473 if (!beep_handle) 5474 seq_printf(m, "status:\t\tnot supported\n"); 5475 else { 5476 seq_printf(m, "status:\t\tsupported\n"); 5477 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5478 } 5479 5480 return 0; 5481 } 5482 5483 static int beep_write(char *buf) 5484 { 5485 char *cmd; 5486 int beep_cmd; 5487 5488 if (!beep_handle) 5489 return -ENODEV; 5490 5491 while ((cmd = next_cmd(&buf))) { 5492 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 5493 beep_cmd >= 0 && beep_cmd <= 17) { 5494 /* beep_cmd set */ 5495 } else 5496 return -EINVAL; 5497 if (tp_features.beep_needs_two_args) { 5498 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 5499 beep_cmd, 0)) 5500 return -EIO; 5501 } else { 5502 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 5503 beep_cmd)) 5504 return -EIO; 5505 } 5506 } 5507 5508 return 0; 5509 } 5510 5511 static struct ibm_struct beep_driver_data = { 5512 .name = "beep", 5513 .read = beep_read, 5514 .write = beep_write, 5515 }; 5516 5517 /************************************************************************* 5518 * Thermal subdriver 5519 */ 5520 5521 enum thermal_access_mode { 5522 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 5523 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 5524 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 5525 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 5526 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 5527 }; 5528 5529 enum { /* TPACPI_THERMAL_TPEC_* */ 5530 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 5531 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 5532 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 5533 5534 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 5535 }; 5536 5537 5538 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 5539 struct ibm_thermal_sensors_struct { 5540 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 5541 }; 5542 5543 static enum thermal_access_mode thermal_read_mode; 5544 5545 /* idx is zero-based */ 5546 static int thermal_get_sensor(int idx, s32 *value) 5547 { 5548 int t; 5549 s8 tmp; 5550 char tmpi[5]; 5551 5552 t = TP_EC_THERMAL_TMP0; 5553 5554 switch (thermal_read_mode) { 5555 #if TPACPI_MAX_THERMAL_SENSORS >= 16 5556 case TPACPI_THERMAL_TPEC_16: 5557 if (idx >= 8 && idx <= 15) { 5558 t = TP_EC_THERMAL_TMP8; 5559 idx -= 8; 5560 } 5561 /* fallthrough */ 5562 #endif 5563 case TPACPI_THERMAL_TPEC_8: 5564 if (idx <= 7) { 5565 if (!acpi_ec_read(t + idx, &tmp)) 5566 return -EIO; 5567 *value = tmp * 1000; 5568 return 0; 5569 } 5570 break; 5571 5572 case TPACPI_THERMAL_ACPI_UPDT: 5573 if (idx <= 7) { 5574 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5575 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 5576 return -EIO; 5577 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5578 return -EIO; 5579 *value = (t - 2732) * 100; 5580 return 0; 5581 } 5582 break; 5583 5584 case TPACPI_THERMAL_ACPI_TMP07: 5585 if (idx <= 7) { 5586 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5587 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5588 return -EIO; 5589 if (t > 127 || t < -127) 5590 t = TP_EC_THERMAL_TMP_NA; 5591 *value = t * 1000; 5592 return 0; 5593 } 5594 break; 5595 5596 case TPACPI_THERMAL_NONE: 5597 default: 5598 return -ENOSYS; 5599 } 5600 5601 return -EINVAL; 5602 } 5603 5604 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 5605 { 5606 int res, i; 5607 int n; 5608 5609 n = 8; 5610 i = 0; 5611 5612 if (!s) 5613 return -EINVAL; 5614 5615 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 5616 n = 16; 5617 5618 for (i = 0 ; i < n; i++) { 5619 res = thermal_get_sensor(i, &s->temp[i]); 5620 if (res) 5621 return res; 5622 } 5623 5624 return n; 5625 } 5626 5627 static void thermal_dump_all_sensors(void) 5628 { 5629 int n, i; 5630 struct ibm_thermal_sensors_struct t; 5631 5632 n = thermal_get_sensors(&t); 5633 if (n <= 0) 5634 return; 5635 5636 pr_notice("temperatures (Celsius):"); 5637 5638 for (i = 0; i < n; i++) { 5639 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 5640 pr_cont(" %d", (int)(t.temp[i] / 1000)); 5641 else 5642 pr_cont(" N/A"); 5643 } 5644 5645 pr_cont("\n"); 5646 } 5647 5648 /* sysfs temp##_input -------------------------------------------------- */ 5649 5650 static ssize_t thermal_temp_input_show(struct device *dev, 5651 struct device_attribute *attr, 5652 char *buf) 5653 { 5654 struct sensor_device_attribute *sensor_attr = 5655 to_sensor_dev_attr(attr); 5656 int idx = sensor_attr->index; 5657 s32 value; 5658 int res; 5659 5660 res = thermal_get_sensor(idx, &value); 5661 if (res) 5662 return res; 5663 if (value == TPACPI_THERMAL_SENSOR_NA) 5664 return -ENXIO; 5665 5666 return snprintf(buf, PAGE_SIZE, "%d\n", value); 5667 } 5668 5669 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 5670 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 5671 thermal_temp_input_show, NULL, _idxB) 5672 5673 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 5674 THERMAL_SENSOR_ATTR_TEMP(1, 0), 5675 THERMAL_SENSOR_ATTR_TEMP(2, 1), 5676 THERMAL_SENSOR_ATTR_TEMP(3, 2), 5677 THERMAL_SENSOR_ATTR_TEMP(4, 3), 5678 THERMAL_SENSOR_ATTR_TEMP(5, 4), 5679 THERMAL_SENSOR_ATTR_TEMP(6, 5), 5680 THERMAL_SENSOR_ATTR_TEMP(7, 6), 5681 THERMAL_SENSOR_ATTR_TEMP(8, 7), 5682 THERMAL_SENSOR_ATTR_TEMP(9, 8), 5683 THERMAL_SENSOR_ATTR_TEMP(10, 9), 5684 THERMAL_SENSOR_ATTR_TEMP(11, 10), 5685 THERMAL_SENSOR_ATTR_TEMP(12, 11), 5686 THERMAL_SENSOR_ATTR_TEMP(13, 12), 5687 THERMAL_SENSOR_ATTR_TEMP(14, 13), 5688 THERMAL_SENSOR_ATTR_TEMP(15, 14), 5689 THERMAL_SENSOR_ATTR_TEMP(16, 15), 5690 }; 5691 5692 #define THERMAL_ATTRS(X) \ 5693 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 5694 5695 static struct attribute *thermal_temp_input_attr[] = { 5696 THERMAL_ATTRS(8), 5697 THERMAL_ATTRS(9), 5698 THERMAL_ATTRS(10), 5699 THERMAL_ATTRS(11), 5700 THERMAL_ATTRS(12), 5701 THERMAL_ATTRS(13), 5702 THERMAL_ATTRS(14), 5703 THERMAL_ATTRS(15), 5704 THERMAL_ATTRS(0), 5705 THERMAL_ATTRS(1), 5706 THERMAL_ATTRS(2), 5707 THERMAL_ATTRS(3), 5708 THERMAL_ATTRS(4), 5709 THERMAL_ATTRS(5), 5710 THERMAL_ATTRS(6), 5711 THERMAL_ATTRS(7), 5712 NULL 5713 }; 5714 5715 static const struct attribute_group thermal_temp_input16_group = { 5716 .attrs = thermal_temp_input_attr 5717 }; 5718 5719 static const struct attribute_group thermal_temp_input8_group = { 5720 .attrs = &thermal_temp_input_attr[8] 5721 }; 5722 5723 #undef THERMAL_SENSOR_ATTR_TEMP 5724 #undef THERMAL_ATTRS 5725 5726 /* --------------------------------------------------------------------- */ 5727 5728 static int __init thermal_init(struct ibm_init_struct *iibm) 5729 { 5730 u8 t, ta1, ta2; 5731 int i; 5732 int acpi_tmp7; 5733 int res; 5734 5735 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 5736 5737 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 5738 5739 if (thinkpad_id.ec_model) { 5740 /* 5741 * Direct EC access mode: sensors at registers 5742 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 5743 * non-implemented, thermal sensors return 0x80 when 5744 * not available 5745 */ 5746 5747 ta1 = ta2 = 0; 5748 for (i = 0; i < 8; i++) { 5749 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 5750 ta1 |= t; 5751 } else { 5752 ta1 = 0; 5753 break; 5754 } 5755 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 5756 ta2 |= t; 5757 } else { 5758 ta1 = 0; 5759 break; 5760 } 5761 } 5762 if (ta1 == 0) { 5763 /* This is sheer paranoia, but we handle it anyway */ 5764 if (acpi_tmp7) { 5765 pr_err("ThinkPad ACPI EC access misbehaving, " 5766 "falling back to ACPI TMPx access " 5767 "mode\n"); 5768 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5769 } else { 5770 pr_err("ThinkPad ACPI EC access misbehaving, " 5771 "disabling thermal sensors access\n"); 5772 thermal_read_mode = TPACPI_THERMAL_NONE; 5773 } 5774 } else { 5775 thermal_read_mode = 5776 (ta2 != 0) ? 5777 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 5778 } 5779 } else if (acpi_tmp7) { 5780 if (tpacpi_is_ibm() && 5781 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 5782 /* 600e/x, 770e, 770x */ 5783 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 5784 } else { 5785 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 5786 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5787 } 5788 } else { 5789 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 5790 thermal_read_mode = TPACPI_THERMAL_NONE; 5791 } 5792 5793 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 5794 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 5795 thermal_read_mode); 5796 5797 switch (thermal_read_mode) { 5798 case TPACPI_THERMAL_TPEC_16: 5799 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5800 &thermal_temp_input16_group); 5801 if (res) 5802 return res; 5803 break; 5804 case TPACPI_THERMAL_TPEC_8: 5805 case TPACPI_THERMAL_ACPI_TMP07: 5806 case TPACPI_THERMAL_ACPI_UPDT: 5807 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5808 &thermal_temp_input8_group); 5809 if (res) 5810 return res; 5811 break; 5812 case TPACPI_THERMAL_NONE: 5813 default: 5814 return 1; 5815 } 5816 5817 return 0; 5818 } 5819 5820 static void thermal_exit(void) 5821 { 5822 switch (thermal_read_mode) { 5823 case TPACPI_THERMAL_TPEC_16: 5824 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5825 &thermal_temp_input16_group); 5826 break; 5827 case TPACPI_THERMAL_TPEC_8: 5828 case TPACPI_THERMAL_ACPI_TMP07: 5829 case TPACPI_THERMAL_ACPI_UPDT: 5830 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5831 &thermal_temp_input8_group); 5832 break; 5833 case TPACPI_THERMAL_NONE: 5834 default: 5835 break; 5836 } 5837 } 5838 5839 static int thermal_read(struct seq_file *m) 5840 { 5841 int n, i; 5842 struct ibm_thermal_sensors_struct t; 5843 5844 n = thermal_get_sensors(&t); 5845 if (unlikely(n < 0)) 5846 return n; 5847 5848 seq_printf(m, "temperatures:\t"); 5849 5850 if (n > 0) { 5851 for (i = 0; i < (n - 1); i++) 5852 seq_printf(m, "%d ", t.temp[i] / 1000); 5853 seq_printf(m, "%d\n", t.temp[i] / 1000); 5854 } else 5855 seq_printf(m, "not supported\n"); 5856 5857 return 0; 5858 } 5859 5860 static struct ibm_struct thermal_driver_data = { 5861 .name = "thermal", 5862 .read = thermal_read, 5863 .exit = thermal_exit, 5864 }; 5865 5866 /************************************************************************* 5867 * Backlight/brightness subdriver 5868 */ 5869 5870 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 5871 5872 /* 5873 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 5874 * CMOS NVRAM byte 0x5E, bits 0-3. 5875 * 5876 * EC HBRV (0x31) has the following layout 5877 * Bit 7: unknown function 5878 * Bit 6: unknown function 5879 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 5880 * Bit 4: must be set to zero to avoid problems 5881 * Bit 3-0: backlight brightness level 5882 * 5883 * brightness_get_raw returns status data in the HBRV layout 5884 * 5885 * WARNING: The X61 has been verified to use HBRV for something else, so 5886 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 5887 * testing on the very early *60 Lenovo models... 5888 */ 5889 5890 enum { 5891 TP_EC_BACKLIGHT = 0x31, 5892 5893 /* TP_EC_BACKLIGHT bitmasks */ 5894 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 5895 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 5896 TP_EC_BACKLIGHT_MAPSW = 0x20, 5897 }; 5898 5899 enum tpacpi_brightness_access_mode { 5900 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 5901 TPACPI_BRGHT_MODE_EC, /* EC control */ 5902 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 5903 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 5904 TPACPI_BRGHT_MODE_MAX 5905 }; 5906 5907 static struct backlight_device *ibm_backlight_device; 5908 5909 static enum tpacpi_brightness_access_mode brightness_mode = 5910 TPACPI_BRGHT_MODE_MAX; 5911 5912 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 5913 5914 static struct mutex brightness_mutex; 5915 5916 /* NVRAM brightness access, 5917 * call with brightness_mutex held! */ 5918 static unsigned int tpacpi_brightness_nvram_get(void) 5919 { 5920 u8 lnvram; 5921 5922 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 5923 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5924 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 5925 lnvram &= bright_maxlvl; 5926 5927 return lnvram; 5928 } 5929 5930 static void tpacpi_brightness_checkpoint_nvram(void) 5931 { 5932 u8 lec = 0; 5933 u8 b_nvram; 5934 5935 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 5936 return; 5937 5938 vdbg_printk(TPACPI_DBG_BRGHT, 5939 "trying to checkpoint backlight level to NVRAM...\n"); 5940 5941 if (mutex_lock_killable(&brightness_mutex) < 0) 5942 return; 5943 5944 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5945 goto unlock; 5946 lec &= TP_EC_BACKLIGHT_LVLMSK; 5947 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 5948 5949 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5950 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 5951 /* NVRAM needs update */ 5952 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 5953 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 5954 b_nvram |= lec; 5955 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 5956 dbg_printk(TPACPI_DBG_BRGHT, 5957 "updated NVRAM backlight level to %u (0x%02x)\n", 5958 (unsigned int) lec, (unsigned int) b_nvram); 5959 } else 5960 vdbg_printk(TPACPI_DBG_BRGHT, 5961 "NVRAM backlight level already is %u (0x%02x)\n", 5962 (unsigned int) lec, (unsigned int) b_nvram); 5963 5964 unlock: 5965 mutex_unlock(&brightness_mutex); 5966 } 5967 5968 5969 /* call with brightness_mutex held! */ 5970 static int tpacpi_brightness_get_raw(int *status) 5971 { 5972 u8 lec = 0; 5973 5974 switch (brightness_mode) { 5975 case TPACPI_BRGHT_MODE_UCMS_STEP: 5976 *status = tpacpi_brightness_nvram_get(); 5977 return 0; 5978 case TPACPI_BRGHT_MODE_EC: 5979 case TPACPI_BRGHT_MODE_ECNVRAM: 5980 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5981 return -EIO; 5982 *status = lec; 5983 return 0; 5984 default: 5985 return -ENXIO; 5986 } 5987 } 5988 5989 /* call with brightness_mutex held! */ 5990 /* do NOT call with illegal backlight level value */ 5991 static int tpacpi_brightness_set_ec(unsigned int value) 5992 { 5993 u8 lec = 0; 5994 5995 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5996 return -EIO; 5997 5998 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 5999 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6000 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6001 return -EIO; 6002 6003 return 0; 6004 } 6005 6006 /* call with brightness_mutex held! */ 6007 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6008 { 6009 int cmos_cmd, inc; 6010 unsigned int current_value, i; 6011 6012 current_value = tpacpi_brightness_nvram_get(); 6013 6014 if (value == current_value) 6015 return 0; 6016 6017 cmos_cmd = (value > current_value) ? 6018 TP_CMOS_BRIGHTNESS_UP : 6019 TP_CMOS_BRIGHTNESS_DOWN; 6020 inc = (value > current_value) ? 1 : -1; 6021 6022 for (i = current_value; i != value; i += inc) 6023 if (issue_thinkpad_cmos_command(cmos_cmd)) 6024 return -EIO; 6025 6026 return 0; 6027 } 6028 6029 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6030 static int brightness_set(unsigned int value) 6031 { 6032 int res; 6033 6034 if (value > bright_maxlvl || value < 0) 6035 return -EINVAL; 6036 6037 vdbg_printk(TPACPI_DBG_BRGHT, 6038 "set backlight level to %d\n", value); 6039 6040 res = mutex_lock_killable(&brightness_mutex); 6041 if (res < 0) 6042 return res; 6043 6044 switch (brightness_mode) { 6045 case TPACPI_BRGHT_MODE_EC: 6046 case TPACPI_BRGHT_MODE_ECNVRAM: 6047 res = tpacpi_brightness_set_ec(value); 6048 break; 6049 case TPACPI_BRGHT_MODE_UCMS_STEP: 6050 res = tpacpi_brightness_set_ucmsstep(value); 6051 break; 6052 default: 6053 res = -ENXIO; 6054 } 6055 6056 mutex_unlock(&brightness_mutex); 6057 return res; 6058 } 6059 6060 /* sysfs backlight class ----------------------------------------------- */ 6061 6062 static int brightness_update_status(struct backlight_device *bd) 6063 { 6064 unsigned int level = 6065 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6066 bd->props.power == FB_BLANK_UNBLANK) ? 6067 bd->props.brightness : 0; 6068 6069 dbg_printk(TPACPI_DBG_BRGHT, 6070 "backlight: attempt to set level to %d\n", 6071 level); 6072 6073 /* it is the backlight class's job (caller) to handle 6074 * EINTR and other errors properly */ 6075 return brightness_set(level); 6076 } 6077 6078 static int brightness_get(struct backlight_device *bd) 6079 { 6080 int status, res; 6081 6082 res = mutex_lock_killable(&brightness_mutex); 6083 if (res < 0) 6084 return 0; 6085 6086 res = tpacpi_brightness_get_raw(&status); 6087 6088 mutex_unlock(&brightness_mutex); 6089 6090 if (res < 0) 6091 return 0; 6092 6093 return status & TP_EC_BACKLIGHT_LVLMSK; 6094 } 6095 6096 static void tpacpi_brightness_notify_change(void) 6097 { 6098 backlight_force_update(ibm_backlight_device, 6099 BACKLIGHT_UPDATE_HOTKEY); 6100 } 6101 6102 static const struct backlight_ops ibm_backlight_data = { 6103 .get_brightness = brightness_get, 6104 .update_status = brightness_update_status, 6105 }; 6106 6107 /* --------------------------------------------------------------------- */ 6108 6109 /* 6110 * Call _BCL method of video device. On some ThinkPads this will 6111 * switch the firmware to the ACPI brightness control mode. 6112 */ 6113 6114 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6115 { 6116 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6117 union acpi_object *obj; 6118 int rc; 6119 6120 if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) { 6121 obj = (union acpi_object *)buffer.pointer; 6122 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6123 pr_err("Unknown _BCL data, please report this to %s\n", 6124 TPACPI_MAIL); 6125 rc = 0; 6126 } else { 6127 rc = obj->package.count; 6128 } 6129 } else { 6130 return 0; 6131 } 6132 6133 kfree(buffer.pointer); 6134 return rc; 6135 } 6136 6137 6138 /* 6139 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6140 */ 6141 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6142 { 6143 acpi_handle video_device; 6144 int bcl_levels = 0; 6145 6146 tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device); 6147 if (video_device) 6148 bcl_levels = tpacpi_query_bcl_levels(video_device); 6149 6150 tp_features.bright_acpimode = (bcl_levels > 0); 6151 6152 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6153 } 6154 6155 /* 6156 * These are only useful for models that have only one possibility 6157 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6158 * these quirks. 6159 */ 6160 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6161 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6162 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6163 6164 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6165 /* Models with ATI GPUs known to require ECNVRAM mode */ 6166 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6167 6168 /* Models with ATI GPUs that can use ECNVRAM */ 6169 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6170 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6171 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6172 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6173 6174 /* Models with Intel Extreme Graphics 2 */ 6175 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6176 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6177 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6178 6179 /* Models with Intel GMA900 */ 6180 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6181 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6182 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6183 }; 6184 6185 /* 6186 * Returns < 0 for error, otherwise sets tp_features.bright_* 6187 * and bright_maxlvl. 6188 */ 6189 static void __init tpacpi_detect_brightness_capabilities(void) 6190 { 6191 unsigned int b; 6192 6193 vdbg_printk(TPACPI_DBG_INIT, 6194 "detecting firmware brightness interface capabilities\n"); 6195 6196 /* we could run a quirks check here (same table used by 6197 * brightness_init) if needed */ 6198 6199 /* 6200 * We always attempt to detect acpi support, so as to switch 6201 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6202 * going to publish a backlight interface 6203 */ 6204 b = tpacpi_check_std_acpi_brightness_support(); 6205 switch (b) { 6206 case 16: 6207 bright_maxlvl = 15; 6208 pr_info("detected a 16-level brightness capable ThinkPad\n"); 6209 break; 6210 case 8: 6211 case 0: 6212 bright_maxlvl = 7; 6213 pr_info("detected a 8-level brightness capable ThinkPad\n"); 6214 break; 6215 default: 6216 pr_err("Unsupported brightness interface, " 6217 "please contact %s\n", TPACPI_MAIL); 6218 tp_features.bright_unkfw = 1; 6219 bright_maxlvl = b - 1; 6220 } 6221 } 6222 6223 static int __init brightness_init(struct ibm_init_struct *iibm) 6224 { 6225 struct backlight_properties props; 6226 int b; 6227 unsigned long quirks; 6228 6229 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6230 6231 mutex_init(&brightness_mutex); 6232 6233 quirks = tpacpi_check_quirks(brightness_quirk_table, 6234 ARRAY_SIZE(brightness_quirk_table)); 6235 6236 /* tpacpi_detect_brightness_capabilities() must have run already */ 6237 6238 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6239 if (tp_features.bright_unkfw) 6240 return 1; 6241 6242 if (!brightness_enable) { 6243 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6244 "brightness support disabled by " 6245 "module parameter\n"); 6246 return 1; 6247 } 6248 6249 if (acpi_video_backlight_support()) { 6250 if (brightness_enable > 1) { 6251 pr_info("Standard ACPI backlight interface " 6252 "available, not loading native one\n"); 6253 return 1; 6254 } else if (brightness_enable == 1) { 6255 pr_warn("Cannot enable backlight brightness support, " 6256 "ACPI is already handling it. Refer to the " 6257 "acpi_backlight kernel parameter.\n"); 6258 return 1; 6259 } 6260 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6261 pr_notice("Standard ACPI backlight interface not " 6262 "available, thinkpad_acpi native " 6263 "brightness control enabled\n"); 6264 } 6265 6266 /* 6267 * Check for module parameter bogosity, note that we 6268 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6269 * able to detect "unspecified" 6270 */ 6271 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6272 return -EINVAL; 6273 6274 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6275 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6276 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6277 if (quirks & TPACPI_BRGHT_Q_EC) 6278 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6279 else 6280 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6281 6282 dbg_printk(TPACPI_DBG_BRGHT, 6283 "driver auto-selected brightness_mode=%d\n", 6284 brightness_mode); 6285 } 6286 6287 /* Safety */ 6288 if (!tpacpi_is_ibm() && 6289 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6290 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6291 return -EINVAL; 6292 6293 if (tpacpi_brightness_get_raw(&b) < 0) 6294 return 1; 6295 6296 memset(&props, 0, sizeof(struct backlight_properties)); 6297 props.type = BACKLIGHT_PLATFORM; 6298 props.max_brightness = bright_maxlvl; 6299 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6300 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6301 NULL, NULL, 6302 &ibm_backlight_data, 6303 &props); 6304 if (IS_ERR(ibm_backlight_device)) { 6305 int rc = PTR_ERR(ibm_backlight_device); 6306 ibm_backlight_device = NULL; 6307 pr_err("Could not register backlight device\n"); 6308 return rc; 6309 } 6310 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6311 "brightness is supported\n"); 6312 6313 if (quirks & TPACPI_BRGHT_Q_ASK) { 6314 pr_notice("brightness: will use unverified default: " 6315 "brightness_mode=%d\n", brightness_mode); 6316 pr_notice("brightness: please report to %s whether it works well " 6317 "or not on your ThinkPad\n", TPACPI_MAIL); 6318 } 6319 6320 /* Added by mistake in early 2007. Probably useless, but it could 6321 * be working around some unknown firmware problem where the value 6322 * read at startup doesn't match the real hardware state... so leave 6323 * it in place just in case */ 6324 backlight_update_status(ibm_backlight_device); 6325 6326 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6327 "brightness: registering brightness hotkeys " 6328 "as change notification\n"); 6329 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6330 | TP_ACPI_HKEY_BRGHTUP_MASK 6331 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6332 return 0; 6333 } 6334 6335 static void brightness_suspend(pm_message_t state) 6336 { 6337 tpacpi_brightness_checkpoint_nvram(); 6338 } 6339 6340 static void brightness_shutdown(void) 6341 { 6342 tpacpi_brightness_checkpoint_nvram(); 6343 } 6344 6345 static void brightness_exit(void) 6346 { 6347 if (ibm_backlight_device) { 6348 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6349 "calling backlight_device_unregister()\n"); 6350 backlight_device_unregister(ibm_backlight_device); 6351 } 6352 6353 tpacpi_brightness_checkpoint_nvram(); 6354 } 6355 6356 static int brightness_read(struct seq_file *m) 6357 { 6358 int level; 6359 6360 level = brightness_get(NULL); 6361 if (level < 0) { 6362 seq_printf(m, "level:\t\tunreadable\n"); 6363 } else { 6364 seq_printf(m, "level:\t\t%d\n", level); 6365 seq_printf(m, "commands:\tup, down\n"); 6366 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6367 bright_maxlvl); 6368 } 6369 6370 return 0; 6371 } 6372 6373 static int brightness_write(char *buf) 6374 { 6375 int level; 6376 int rc; 6377 char *cmd; 6378 6379 level = brightness_get(NULL); 6380 if (level < 0) 6381 return level; 6382 6383 while ((cmd = next_cmd(&buf))) { 6384 if (strlencmp(cmd, "up") == 0) { 6385 if (level < bright_maxlvl) 6386 level++; 6387 } else if (strlencmp(cmd, "down") == 0) { 6388 if (level > 0) 6389 level--; 6390 } else if (sscanf(cmd, "level %d", &level) == 1 && 6391 level >= 0 && level <= bright_maxlvl) { 6392 /* new level set */ 6393 } else 6394 return -EINVAL; 6395 } 6396 6397 tpacpi_disclose_usertask("procfs brightness", 6398 "set level to %d\n", level); 6399 6400 /* 6401 * Now we know what the final level should be, so we try to set it. 6402 * Doing it this way makes the syscall restartable in case of EINTR 6403 */ 6404 rc = brightness_set(level); 6405 if (!rc && ibm_backlight_device) 6406 backlight_force_update(ibm_backlight_device, 6407 BACKLIGHT_UPDATE_SYSFS); 6408 return (rc == -EINTR)? -ERESTARTSYS : rc; 6409 } 6410 6411 static struct ibm_struct brightness_driver_data = { 6412 .name = "brightness", 6413 .read = brightness_read, 6414 .write = brightness_write, 6415 .exit = brightness_exit, 6416 .suspend = brightness_suspend, 6417 .shutdown = brightness_shutdown, 6418 }; 6419 6420 /************************************************************************* 6421 * Volume subdriver 6422 */ 6423 6424 /* 6425 * IBM ThinkPads have a simple volume controller with MUTE gating. 6426 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 6427 * 6428 * Since the *61 series (and probably also the later *60 series), Lenovo 6429 * ThinkPads only implement the MUTE gate. 6430 * 6431 * EC register 0x30 6432 * Bit 6: MUTE (1 mutes sound) 6433 * Bit 3-0: Volume 6434 * Other bits should be zero as far as we know. 6435 * 6436 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 6437 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 6438 * such as bit 7 which is used to detect repeated presses of MUTE, 6439 * and we leave them unchanged. 6440 */ 6441 6442 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 6443 6444 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 6445 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 6446 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 6447 6448 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */ 6449 static char *alsa_id = "ThinkPadEC"; 6450 static int alsa_enable = SNDRV_DEFAULT_ENABLE1; 6451 6452 struct tpacpi_alsa_data { 6453 struct snd_card *card; 6454 struct snd_ctl_elem_id *ctl_mute_id; 6455 struct snd_ctl_elem_id *ctl_vol_id; 6456 }; 6457 6458 static struct snd_card *alsa_card; 6459 6460 enum { 6461 TP_EC_AUDIO = 0x30, 6462 6463 /* TP_EC_AUDIO bits */ 6464 TP_EC_AUDIO_MUTESW = 6, 6465 6466 /* TP_EC_AUDIO bitmasks */ 6467 TP_EC_AUDIO_LVL_MSK = 0x0F, 6468 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 6469 6470 /* Maximum volume */ 6471 TP_EC_VOLUME_MAX = 14, 6472 }; 6473 6474 enum tpacpi_volume_access_mode { 6475 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 6476 TPACPI_VOL_MODE_EC, /* Pure EC control */ 6477 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 6478 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6479 TPACPI_VOL_MODE_MAX 6480 }; 6481 6482 enum tpacpi_volume_capabilities { 6483 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 6484 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 6485 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 6486 TPACPI_VOL_CAP_MAX 6487 }; 6488 6489 static enum tpacpi_volume_access_mode volume_mode = 6490 TPACPI_VOL_MODE_MAX; 6491 6492 static enum tpacpi_volume_capabilities volume_capabilities; 6493 static int volume_control_allowed; 6494 6495 /* 6496 * Used to syncronize writers to TP_EC_AUDIO and 6497 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 6498 */ 6499 static struct mutex volume_mutex; 6500 6501 static void tpacpi_volume_checkpoint_nvram(void) 6502 { 6503 u8 lec = 0; 6504 u8 b_nvram; 6505 u8 ec_mask; 6506 6507 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 6508 return; 6509 if (!volume_control_allowed) 6510 return; 6511 6512 vdbg_printk(TPACPI_DBG_MIXER, 6513 "trying to checkpoint mixer state to NVRAM...\n"); 6514 6515 if (tp_features.mixer_no_level_control) 6516 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 6517 else 6518 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 6519 6520 if (mutex_lock_killable(&volume_mutex) < 0) 6521 return; 6522 6523 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 6524 goto unlock; 6525 lec &= ec_mask; 6526 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 6527 6528 if (lec != (b_nvram & ec_mask)) { 6529 /* NVRAM needs update */ 6530 b_nvram &= ~ec_mask; 6531 b_nvram |= lec; 6532 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 6533 dbg_printk(TPACPI_DBG_MIXER, 6534 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 6535 (unsigned int) lec, (unsigned int) b_nvram); 6536 } else { 6537 vdbg_printk(TPACPI_DBG_MIXER, 6538 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 6539 (unsigned int) lec, (unsigned int) b_nvram); 6540 } 6541 6542 unlock: 6543 mutex_unlock(&volume_mutex); 6544 } 6545 6546 static int volume_get_status_ec(u8 *status) 6547 { 6548 u8 s; 6549 6550 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 6551 return -EIO; 6552 6553 *status = s; 6554 6555 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 6556 6557 return 0; 6558 } 6559 6560 static int volume_get_status(u8 *status) 6561 { 6562 return volume_get_status_ec(status); 6563 } 6564 6565 static int volume_set_status_ec(const u8 status) 6566 { 6567 if (!acpi_ec_write(TP_EC_AUDIO, status)) 6568 return -EIO; 6569 6570 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 6571 6572 return 0; 6573 } 6574 6575 static int volume_set_status(const u8 status) 6576 { 6577 return volume_set_status_ec(status); 6578 } 6579 6580 /* returns < 0 on error, 0 on no change, 1 on change */ 6581 static int __volume_set_mute_ec(const bool mute) 6582 { 6583 int rc; 6584 u8 s, n; 6585 6586 if (mutex_lock_killable(&volume_mutex) < 0) 6587 return -EINTR; 6588 6589 rc = volume_get_status_ec(&s); 6590 if (rc) 6591 goto unlock; 6592 6593 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 6594 s & ~TP_EC_AUDIO_MUTESW_MSK; 6595 6596 if (n != s) { 6597 rc = volume_set_status_ec(n); 6598 if (!rc) 6599 rc = 1; 6600 } 6601 6602 unlock: 6603 mutex_unlock(&volume_mutex); 6604 return rc; 6605 } 6606 6607 static int volume_alsa_set_mute(const bool mute) 6608 { 6609 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 6610 (mute) ? "" : "un"); 6611 return __volume_set_mute_ec(mute); 6612 } 6613 6614 static int volume_set_mute(const bool mute) 6615 { 6616 int rc; 6617 6618 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 6619 (mute) ? "" : "un"); 6620 6621 rc = __volume_set_mute_ec(mute); 6622 return (rc < 0) ? rc : 0; 6623 } 6624 6625 /* returns < 0 on error, 0 on no change, 1 on change */ 6626 static int __volume_set_volume_ec(const u8 vol) 6627 { 6628 int rc; 6629 u8 s, n; 6630 6631 if (vol > TP_EC_VOLUME_MAX) 6632 return -EINVAL; 6633 6634 if (mutex_lock_killable(&volume_mutex) < 0) 6635 return -EINTR; 6636 6637 rc = volume_get_status_ec(&s); 6638 if (rc) 6639 goto unlock; 6640 6641 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 6642 6643 if (n != s) { 6644 rc = volume_set_status_ec(n); 6645 if (!rc) 6646 rc = 1; 6647 } 6648 6649 unlock: 6650 mutex_unlock(&volume_mutex); 6651 return rc; 6652 } 6653 6654 static int volume_alsa_set_volume(const u8 vol) 6655 { 6656 dbg_printk(TPACPI_DBG_MIXER, 6657 "ALSA: trying to set volume level to %hu\n", vol); 6658 return __volume_set_volume_ec(vol); 6659 } 6660 6661 static void volume_alsa_notify_change(void) 6662 { 6663 struct tpacpi_alsa_data *d; 6664 6665 if (alsa_card && alsa_card->private_data) { 6666 d = alsa_card->private_data; 6667 if (d->ctl_mute_id) 6668 snd_ctl_notify(alsa_card, 6669 SNDRV_CTL_EVENT_MASK_VALUE, 6670 d->ctl_mute_id); 6671 if (d->ctl_vol_id) 6672 snd_ctl_notify(alsa_card, 6673 SNDRV_CTL_EVENT_MASK_VALUE, 6674 d->ctl_vol_id); 6675 } 6676 } 6677 6678 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 6679 struct snd_ctl_elem_info *uinfo) 6680 { 6681 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 6682 uinfo->count = 1; 6683 uinfo->value.integer.min = 0; 6684 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 6685 return 0; 6686 } 6687 6688 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 6689 struct snd_ctl_elem_value *ucontrol) 6690 { 6691 u8 s; 6692 int rc; 6693 6694 rc = volume_get_status(&s); 6695 if (rc < 0) 6696 return rc; 6697 6698 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 6699 return 0; 6700 } 6701 6702 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 6703 struct snd_ctl_elem_value *ucontrol) 6704 { 6705 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 6706 ucontrol->value.integer.value[0]); 6707 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 6708 } 6709 6710 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 6711 6712 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 6713 struct snd_ctl_elem_value *ucontrol) 6714 { 6715 u8 s; 6716 int rc; 6717 6718 rc = volume_get_status(&s); 6719 if (rc < 0) 6720 return rc; 6721 6722 ucontrol->value.integer.value[0] = 6723 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 6724 return 0; 6725 } 6726 6727 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 6728 struct snd_ctl_elem_value *ucontrol) 6729 { 6730 tpacpi_disclose_usertask("ALSA", "%smute\n", 6731 ucontrol->value.integer.value[0] ? 6732 "un" : ""); 6733 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 6734 } 6735 6736 static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = { 6737 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6738 .name = "Console Playback Volume", 6739 .index = 0, 6740 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6741 .info = volume_alsa_vol_info, 6742 .get = volume_alsa_vol_get, 6743 }; 6744 6745 static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = { 6746 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6747 .name = "Console Playback Switch", 6748 .index = 0, 6749 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6750 .info = volume_alsa_mute_info, 6751 .get = volume_alsa_mute_get, 6752 }; 6753 6754 static void volume_suspend(pm_message_t state) 6755 { 6756 tpacpi_volume_checkpoint_nvram(); 6757 } 6758 6759 static void volume_resume(void) 6760 { 6761 volume_alsa_notify_change(); 6762 } 6763 6764 static void volume_shutdown(void) 6765 { 6766 tpacpi_volume_checkpoint_nvram(); 6767 } 6768 6769 static void volume_exit(void) 6770 { 6771 if (alsa_card) { 6772 snd_card_free(alsa_card); 6773 alsa_card = NULL; 6774 } 6775 6776 tpacpi_volume_checkpoint_nvram(); 6777 } 6778 6779 static int __init volume_create_alsa_mixer(void) 6780 { 6781 struct snd_card *card; 6782 struct tpacpi_alsa_data *data; 6783 struct snd_kcontrol *ctl_vol; 6784 struct snd_kcontrol *ctl_mute; 6785 int rc; 6786 6787 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE, 6788 sizeof(struct tpacpi_alsa_data), &card); 6789 if (rc < 0 || !card) { 6790 pr_err("Failed to create ALSA card structures: %d\n", rc); 6791 return 1; 6792 } 6793 6794 BUG_ON(!card->private_data); 6795 data = card->private_data; 6796 data->card = card; 6797 6798 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 6799 sizeof(card->driver)); 6800 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 6801 sizeof(card->shortname)); 6802 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 6803 (thinkpad_id.ec_version_str) ? 6804 thinkpad_id.ec_version_str : "(unknown)"); 6805 snprintf(card->longname, sizeof(card->longname), 6806 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 6807 (thinkpad_id.ec_version_str) ? 6808 thinkpad_id.ec_version_str : "unknown"); 6809 6810 if (volume_control_allowed) { 6811 volume_alsa_control_vol.put = volume_alsa_vol_put; 6812 volume_alsa_control_vol.access = 6813 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6814 6815 volume_alsa_control_mute.put = volume_alsa_mute_put; 6816 volume_alsa_control_mute.access = 6817 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6818 } 6819 6820 if (!tp_features.mixer_no_level_control) { 6821 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 6822 rc = snd_ctl_add(card, ctl_vol); 6823 if (rc < 0) { 6824 pr_err("Failed to create ALSA volume control: %d\n", 6825 rc); 6826 goto err_exit; 6827 } 6828 data->ctl_vol_id = &ctl_vol->id; 6829 } 6830 6831 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 6832 rc = snd_ctl_add(card, ctl_mute); 6833 if (rc < 0) { 6834 pr_err("Failed to create ALSA mute control: %d\n", rc); 6835 goto err_exit; 6836 } 6837 data->ctl_mute_id = &ctl_mute->id; 6838 6839 snd_card_set_dev(card, &tpacpi_pdev->dev); 6840 rc = snd_card_register(card); 6841 if (rc < 0) { 6842 pr_err("Failed to register ALSA card: %d\n", rc); 6843 goto err_exit; 6844 } 6845 6846 alsa_card = card; 6847 return 0; 6848 6849 err_exit: 6850 snd_card_free(card); 6851 return 1; 6852 } 6853 6854 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 6855 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 6856 6857 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 6858 /* Whitelist volume level on all IBM by default */ 6859 { .vendor = PCI_VENDOR_ID_IBM, 6860 .bios = TPACPI_MATCH_ANY, 6861 .ec = TPACPI_MATCH_ANY, 6862 .quirks = TPACPI_VOL_Q_LEVEL }, 6863 6864 /* Lenovo models with volume control (needs confirmation) */ 6865 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 6866 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 6867 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 6868 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 6869 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 6870 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 6871 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 6872 6873 /* Whitelist mute-only on all Lenovo by default */ 6874 { .vendor = PCI_VENDOR_ID_LENOVO, 6875 .bios = TPACPI_MATCH_ANY, 6876 .ec = TPACPI_MATCH_ANY, 6877 .quirks = TPACPI_VOL_Q_MUTEONLY } 6878 }; 6879 6880 static int __init volume_init(struct ibm_init_struct *iibm) 6881 { 6882 unsigned long quirks; 6883 int rc; 6884 6885 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 6886 6887 mutex_init(&volume_mutex); 6888 6889 /* 6890 * Check for module parameter bogosity, note that we 6891 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 6892 * able to detect "unspecified" 6893 */ 6894 if (volume_mode > TPACPI_VOL_MODE_MAX) 6895 return -EINVAL; 6896 6897 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 6898 pr_err("UCMS step volume mode not implemented, " 6899 "please contact %s\n", TPACPI_MAIL); 6900 return 1; 6901 } 6902 6903 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 6904 return -EINVAL; 6905 6906 /* 6907 * The ALSA mixer is our primary interface. 6908 * When disabled, don't install the subdriver at all 6909 */ 6910 if (!alsa_enable) { 6911 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6912 "ALSA mixer disabled by parameter, " 6913 "not loading volume subdriver...\n"); 6914 return 1; 6915 } 6916 6917 quirks = tpacpi_check_quirks(volume_quirk_table, 6918 ARRAY_SIZE(volume_quirk_table)); 6919 6920 switch (volume_capabilities) { 6921 case TPACPI_VOL_CAP_AUTO: 6922 if (quirks & TPACPI_VOL_Q_MUTEONLY) 6923 tp_features.mixer_no_level_control = 1; 6924 else if (quirks & TPACPI_VOL_Q_LEVEL) 6925 tp_features.mixer_no_level_control = 0; 6926 else 6927 return 1; /* no mixer */ 6928 break; 6929 case TPACPI_VOL_CAP_VOLMUTE: 6930 tp_features.mixer_no_level_control = 0; 6931 break; 6932 case TPACPI_VOL_CAP_MUTEONLY: 6933 tp_features.mixer_no_level_control = 1; 6934 break; 6935 default: 6936 return 1; 6937 } 6938 6939 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 6940 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6941 "using user-supplied volume_capabilities=%d\n", 6942 volume_capabilities); 6943 6944 if (volume_mode == TPACPI_VOL_MODE_AUTO || 6945 volume_mode == TPACPI_VOL_MODE_MAX) { 6946 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 6947 6948 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6949 "driver auto-selected volume_mode=%d\n", 6950 volume_mode); 6951 } else { 6952 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6953 "using user-supplied volume_mode=%d\n", 6954 volume_mode); 6955 } 6956 6957 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6958 "mute is supported, volume control is %s\n", 6959 str_supported(!tp_features.mixer_no_level_control)); 6960 6961 rc = volume_create_alsa_mixer(); 6962 if (rc) { 6963 pr_err("Could not create the ALSA mixer interface\n"); 6964 return rc; 6965 } 6966 6967 pr_info("Console audio control enabled, mode: %s\n", 6968 (volume_control_allowed) ? 6969 "override (read/write)" : 6970 "monitor (read only)"); 6971 6972 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6973 "registering volume hotkeys as change notification\n"); 6974 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6975 | TP_ACPI_HKEY_VOLUP_MASK 6976 | TP_ACPI_HKEY_VOLDWN_MASK 6977 | TP_ACPI_HKEY_MUTE_MASK); 6978 6979 return 0; 6980 } 6981 6982 static int volume_read(struct seq_file *m) 6983 { 6984 u8 status; 6985 6986 if (volume_get_status(&status) < 0) { 6987 seq_printf(m, "level:\t\tunreadable\n"); 6988 } else { 6989 if (tp_features.mixer_no_level_control) 6990 seq_printf(m, "level:\t\tunsupported\n"); 6991 else 6992 seq_printf(m, "level:\t\t%d\n", 6993 status & TP_EC_AUDIO_LVL_MSK); 6994 6995 seq_printf(m, "mute:\t\t%s\n", 6996 onoff(status, TP_EC_AUDIO_MUTESW)); 6997 6998 if (volume_control_allowed) { 6999 seq_printf(m, "commands:\tunmute, mute\n"); 7000 if (!tp_features.mixer_no_level_control) { 7001 seq_printf(m, 7002 "commands:\tup, down\n"); 7003 seq_printf(m, 7004 "commands:\tlevel <level>" 7005 " (<level> is 0-%d)\n", 7006 TP_EC_VOLUME_MAX); 7007 } 7008 } 7009 } 7010 7011 return 0; 7012 } 7013 7014 static int volume_write(char *buf) 7015 { 7016 u8 s; 7017 u8 new_level, new_mute; 7018 int l; 7019 char *cmd; 7020 int rc; 7021 7022 /* 7023 * We do allow volume control at driver startup, so that the 7024 * user can set initial state through the volume=... parameter hack. 7025 */ 7026 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7027 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7028 tp_warned.volume_ctrl_forbidden = 1; 7029 pr_notice("Console audio control in monitor mode, " 7030 "changes are not allowed\n"); 7031 pr_notice("Use the volume_control=1 module parameter " 7032 "to enable volume control\n"); 7033 } 7034 return -EPERM; 7035 } 7036 7037 rc = volume_get_status(&s); 7038 if (rc < 0) 7039 return rc; 7040 7041 new_level = s & TP_EC_AUDIO_LVL_MSK; 7042 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7043 7044 while ((cmd = next_cmd(&buf))) { 7045 if (!tp_features.mixer_no_level_control) { 7046 if (strlencmp(cmd, "up") == 0) { 7047 if (new_mute) 7048 new_mute = 0; 7049 else if (new_level < TP_EC_VOLUME_MAX) 7050 new_level++; 7051 continue; 7052 } else if (strlencmp(cmd, "down") == 0) { 7053 if (new_mute) 7054 new_mute = 0; 7055 else if (new_level > 0) 7056 new_level--; 7057 continue; 7058 } else if (sscanf(cmd, "level %u", &l) == 1 && 7059 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7060 new_level = l; 7061 continue; 7062 } 7063 } 7064 if (strlencmp(cmd, "mute") == 0) 7065 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7066 else if (strlencmp(cmd, "unmute") == 0) 7067 new_mute = 0; 7068 else 7069 return -EINVAL; 7070 } 7071 7072 if (tp_features.mixer_no_level_control) { 7073 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7074 new_mute ? "" : "un"); 7075 rc = volume_set_mute(!!new_mute); 7076 } else { 7077 tpacpi_disclose_usertask("procfs volume", 7078 "%smute and set level to %d\n", 7079 new_mute ? "" : "un", new_level); 7080 rc = volume_set_status(new_mute | new_level); 7081 } 7082 volume_alsa_notify_change(); 7083 7084 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7085 } 7086 7087 static struct ibm_struct volume_driver_data = { 7088 .name = "volume", 7089 .read = volume_read, 7090 .write = volume_write, 7091 .exit = volume_exit, 7092 .suspend = volume_suspend, 7093 .resume = volume_resume, 7094 .shutdown = volume_shutdown, 7095 }; 7096 7097 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7098 7099 #define alsa_card NULL 7100 7101 static void inline volume_alsa_notify_change(void) 7102 { 7103 } 7104 7105 static int __init volume_init(struct ibm_init_struct *iibm) 7106 { 7107 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7108 7109 return 1; 7110 } 7111 7112 static struct ibm_struct volume_driver_data = { 7113 .name = "volume", 7114 }; 7115 7116 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7117 7118 /************************************************************************* 7119 * Fan subdriver 7120 */ 7121 7122 /* 7123 * FAN ACCESS MODES 7124 * 7125 * TPACPI_FAN_RD_ACPI_GFAN: 7126 * ACPI GFAN method: returns fan level 7127 * 7128 * see TPACPI_FAN_WR_ACPI_SFAN 7129 * EC 0x2f (HFSP) not available if GFAN exists 7130 * 7131 * TPACPI_FAN_WR_ACPI_SFAN: 7132 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7133 * 7134 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7135 * it for writing. 7136 * 7137 * TPACPI_FAN_WR_TPEC: 7138 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7139 * Supported on almost all ThinkPads 7140 * 7141 * Fan speed changes of any sort (including those caused by the 7142 * disengaged mode) are usually done slowly by the firmware as the 7143 * maximum amount of fan duty cycle change per second seems to be 7144 * limited. 7145 * 7146 * Reading is not available if GFAN exists. 7147 * Writing is not available if SFAN exists. 7148 * 7149 * Bits 7150 * 7 automatic mode engaged; 7151 * (default operation mode of the ThinkPad) 7152 * fan level is ignored in this mode. 7153 * 6 full speed mode (takes precedence over bit 7); 7154 * not available on all thinkpads. May disable 7155 * the tachometer while the fan controller ramps up 7156 * the speed (which can take up to a few *minutes*). 7157 * Speeds up fan to 100% duty-cycle, which is far above 7158 * the standard RPM levels. It is not impossible that 7159 * it could cause hardware damage. 7160 * 5-3 unused in some models. Extra bits for fan level 7161 * in others, but still useless as all values above 7162 * 7 map to the same speed as level 7 in these models. 7163 * 2-0 fan level (0..7 usually) 7164 * 0x00 = stop 7165 * 0x07 = max (set when temperatures critical) 7166 * Some ThinkPads may have other levels, see 7167 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7168 * 7169 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7170 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7171 * does so, its initial value is meaningless (0x07). 7172 * 7173 * For firmware bugs, refer to: 7174 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7175 * 7176 * ---- 7177 * 7178 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7179 * Main fan tachometer reading (in RPM) 7180 * 7181 * This register is present on all ThinkPads with a new-style EC, and 7182 * it is known not to be present on the A21m/e, and T22, as there is 7183 * something else in offset 0x84 according to the ACPI DSDT. Other 7184 * ThinkPads from this same time period (and earlier) probably lack the 7185 * tachometer as well. 7186 * 7187 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7188 * was never fixed by IBM to report the EC firmware version string 7189 * probably support the tachometer (like the early X models), so 7190 * detecting it is quite hard. We need more data to know for sure. 7191 * 7192 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7193 * might result. 7194 * 7195 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7196 * mode. 7197 * 7198 * For firmware bugs, refer to: 7199 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7200 * 7201 * ---- 7202 * 7203 * ThinkPad EC register 0x31 bit 0 (only on select models) 7204 * 7205 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7206 * show the speed of the main fan. When bit 0 of EC register 0x31 7207 * is one, the tachometer registers show the speed of the auxiliary 7208 * fan. 7209 * 7210 * Fan control seems to affect both fans, regardless of the state 7211 * of this bit. 7212 * 7213 * So far, only the firmware for the X60/X61 non-tablet versions 7214 * seem to support this (firmware TP-7M). 7215 * 7216 * TPACPI_FAN_WR_ACPI_FANS: 7217 * ThinkPad X31, X40, X41. Not available in the X60. 7218 * 7219 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7220 * high speed. ACPI DSDT seems to map these three speeds to levels 7221 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7222 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7223 * 7224 * The speeds are stored on handles 7225 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7226 * 7227 * There are three default speed sets, accessible as handles: 7228 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7229 * 7230 * ACPI DSDT switches which set is in use depending on various 7231 * factors. 7232 * 7233 * TPACPI_FAN_WR_TPEC is also available and should be used to 7234 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7235 * but the ACPI tables just mention level 7. 7236 */ 7237 7238 enum { /* Fan control constants */ 7239 fan_status_offset = 0x2f, /* EC register 0x2f */ 7240 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7241 * 0x84 must be read before 0x85 */ 7242 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7243 bit 0 selects which fan is active */ 7244 7245 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7246 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7247 7248 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7249 }; 7250 7251 enum fan_status_access_mode { 7252 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7253 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7254 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7255 }; 7256 7257 enum fan_control_access_mode { 7258 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7259 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7260 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7261 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7262 }; 7263 7264 enum fan_control_commands { 7265 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7266 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7267 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7268 * and also watchdog cmd */ 7269 }; 7270 7271 static int fan_control_allowed; 7272 7273 static enum fan_status_access_mode fan_status_access_mode; 7274 static enum fan_control_access_mode fan_control_access_mode; 7275 static enum fan_control_commands fan_control_commands; 7276 7277 static u8 fan_control_initial_status; 7278 static u8 fan_control_desired_level; 7279 static u8 fan_control_resume_level; 7280 static int fan_watchdog_maxinterval; 7281 7282 static struct mutex fan_mutex; 7283 7284 static void fan_watchdog_fire(struct work_struct *ignored); 7285 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7286 7287 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7288 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7289 "\\FSPD", /* 600e/x, 770e, 770x */ 7290 ); /* all others */ 7291 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7292 "JFNS", /* 770x-JL */ 7293 ); /* all others */ 7294 7295 /* 7296 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7297 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7298 * be in auto mode (0x80). 7299 * 7300 * This is corrected by any write to HFSP either by the driver, or 7301 * by the firmware. 7302 * 7303 * We assume 0x07 really means auto mode while this quirk is active, 7304 * as this is far more likely than the ThinkPad being in level 7, 7305 * which is only used by the firmware during thermal emergencies. 7306 * 7307 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7308 * TP-70 (T43, R52), which are known to be buggy. 7309 */ 7310 7311 static void fan_quirk1_setup(void) 7312 { 7313 if (fan_control_initial_status == 0x07) { 7314 pr_notice("fan_init: initial fan status is unknown, " 7315 "assuming it is in auto mode\n"); 7316 tp_features.fan_ctrl_status_undef = 1; 7317 } 7318 } 7319 7320 static void fan_quirk1_handle(u8 *fan_status) 7321 { 7322 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7323 if (*fan_status != fan_control_initial_status) { 7324 /* something changed the HFSP regisnter since 7325 * driver init time, so it is not undefined 7326 * anymore */ 7327 tp_features.fan_ctrl_status_undef = 0; 7328 } else { 7329 /* Return most likely status. In fact, it 7330 * might be the only possible status */ 7331 *fan_status = TP_EC_FAN_AUTO; 7332 } 7333 } 7334 } 7335 7336 /* Select main fan on X60/X61, NOOP on others */ 7337 static bool fan_select_fan1(void) 7338 { 7339 if (tp_features.second_fan) { 7340 u8 val; 7341 7342 if (ec_read(fan_select_offset, &val) < 0) 7343 return false; 7344 val &= 0xFEU; 7345 if (ec_write(fan_select_offset, val) < 0) 7346 return false; 7347 } 7348 return true; 7349 } 7350 7351 /* Select secondary fan on X60/X61 */ 7352 static bool fan_select_fan2(void) 7353 { 7354 u8 val; 7355 7356 if (!tp_features.second_fan) 7357 return false; 7358 7359 if (ec_read(fan_select_offset, &val) < 0) 7360 return false; 7361 val |= 0x01U; 7362 if (ec_write(fan_select_offset, val) < 0) 7363 return false; 7364 7365 return true; 7366 } 7367 7368 /* 7369 * Call with fan_mutex held 7370 */ 7371 static void fan_update_desired_level(u8 status) 7372 { 7373 if ((status & 7374 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7375 if (status > 7) 7376 fan_control_desired_level = 7; 7377 else 7378 fan_control_desired_level = status; 7379 } 7380 } 7381 7382 static int fan_get_status(u8 *status) 7383 { 7384 u8 s; 7385 7386 /* TODO: 7387 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 7388 7389 switch (fan_status_access_mode) { 7390 case TPACPI_FAN_RD_ACPI_GFAN: 7391 /* 570, 600e/x, 770e, 770x */ 7392 7393 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d"))) 7394 return -EIO; 7395 7396 if (likely(status)) 7397 *status = s & 0x07; 7398 7399 break; 7400 7401 case TPACPI_FAN_RD_TPEC: 7402 /* all except 570, 600e/x, 770e, 770x */ 7403 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 7404 return -EIO; 7405 7406 if (likely(status)) { 7407 *status = s; 7408 fan_quirk1_handle(status); 7409 } 7410 7411 break; 7412 7413 default: 7414 return -ENXIO; 7415 } 7416 7417 return 0; 7418 } 7419 7420 static int fan_get_status_safe(u8 *status) 7421 { 7422 int rc; 7423 u8 s; 7424 7425 if (mutex_lock_killable(&fan_mutex)) 7426 return -ERESTARTSYS; 7427 rc = fan_get_status(&s); 7428 if (!rc) 7429 fan_update_desired_level(s); 7430 mutex_unlock(&fan_mutex); 7431 7432 if (status) 7433 *status = s; 7434 7435 return rc; 7436 } 7437 7438 static int fan_get_speed(unsigned int *speed) 7439 { 7440 u8 hi, lo; 7441 7442 switch (fan_status_access_mode) { 7443 case TPACPI_FAN_RD_TPEC: 7444 /* all except 570, 600e/x, 770e, 770x */ 7445 if (unlikely(!fan_select_fan1())) 7446 return -EIO; 7447 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 7448 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 7449 return -EIO; 7450 7451 if (likely(speed)) 7452 *speed = (hi << 8) | lo; 7453 7454 break; 7455 7456 default: 7457 return -ENXIO; 7458 } 7459 7460 return 0; 7461 } 7462 7463 static int fan2_get_speed(unsigned int *speed) 7464 { 7465 u8 hi, lo; 7466 bool rc; 7467 7468 switch (fan_status_access_mode) { 7469 case TPACPI_FAN_RD_TPEC: 7470 /* all except 570, 600e/x, 770e, 770x */ 7471 if (unlikely(!fan_select_fan2())) 7472 return -EIO; 7473 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 7474 !acpi_ec_read(fan_rpm_offset + 1, &hi); 7475 fan_select_fan1(); /* play it safe */ 7476 if (rc) 7477 return -EIO; 7478 7479 if (likely(speed)) 7480 *speed = (hi << 8) | lo; 7481 7482 break; 7483 7484 default: 7485 return -ENXIO; 7486 } 7487 7488 return 0; 7489 } 7490 7491 static int fan_set_level(int level) 7492 { 7493 if (!fan_control_allowed) 7494 return -EPERM; 7495 7496 switch (fan_control_access_mode) { 7497 case TPACPI_FAN_WR_ACPI_SFAN: 7498 if (level >= 0 && level <= 7) { 7499 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 7500 return -EIO; 7501 } else 7502 return -EINVAL; 7503 break; 7504 7505 case TPACPI_FAN_WR_ACPI_FANS: 7506 case TPACPI_FAN_WR_TPEC: 7507 if (!(level & TP_EC_FAN_AUTO) && 7508 !(level & TP_EC_FAN_FULLSPEED) && 7509 ((level < 0) || (level > 7))) 7510 return -EINVAL; 7511 7512 /* safety net should the EC not support AUTO 7513 * or FULLSPEED mode bits and just ignore them */ 7514 if (level & TP_EC_FAN_FULLSPEED) 7515 level |= 7; /* safety min speed 7 */ 7516 else if (level & TP_EC_FAN_AUTO) 7517 level |= 4; /* safety min speed 4 */ 7518 7519 if (!acpi_ec_write(fan_status_offset, level)) 7520 return -EIO; 7521 else 7522 tp_features.fan_ctrl_status_undef = 0; 7523 break; 7524 7525 default: 7526 return -ENXIO; 7527 } 7528 7529 vdbg_printk(TPACPI_DBG_FAN, 7530 "fan control: set fan control register to 0x%02x\n", level); 7531 return 0; 7532 } 7533 7534 static int fan_set_level_safe(int level) 7535 { 7536 int rc; 7537 7538 if (!fan_control_allowed) 7539 return -EPERM; 7540 7541 if (mutex_lock_killable(&fan_mutex)) 7542 return -ERESTARTSYS; 7543 7544 if (level == TPACPI_FAN_LAST_LEVEL) 7545 level = fan_control_desired_level; 7546 7547 rc = fan_set_level(level); 7548 if (!rc) 7549 fan_update_desired_level(level); 7550 7551 mutex_unlock(&fan_mutex); 7552 return rc; 7553 } 7554 7555 static int fan_set_enable(void) 7556 { 7557 u8 s; 7558 int rc; 7559 7560 if (!fan_control_allowed) 7561 return -EPERM; 7562 7563 if (mutex_lock_killable(&fan_mutex)) 7564 return -ERESTARTSYS; 7565 7566 switch (fan_control_access_mode) { 7567 case TPACPI_FAN_WR_ACPI_FANS: 7568 case TPACPI_FAN_WR_TPEC: 7569 rc = fan_get_status(&s); 7570 if (rc < 0) 7571 break; 7572 7573 /* Don't go out of emergency fan mode */ 7574 if (s != 7) { 7575 s &= 0x07; 7576 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 7577 } 7578 7579 if (!acpi_ec_write(fan_status_offset, s)) 7580 rc = -EIO; 7581 else { 7582 tp_features.fan_ctrl_status_undef = 0; 7583 rc = 0; 7584 } 7585 break; 7586 7587 case TPACPI_FAN_WR_ACPI_SFAN: 7588 rc = fan_get_status(&s); 7589 if (rc < 0) 7590 break; 7591 7592 s &= 0x07; 7593 7594 /* Set fan to at least level 4 */ 7595 s |= 4; 7596 7597 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 7598 rc = -EIO; 7599 else 7600 rc = 0; 7601 break; 7602 7603 default: 7604 rc = -ENXIO; 7605 } 7606 7607 mutex_unlock(&fan_mutex); 7608 7609 if (!rc) 7610 vdbg_printk(TPACPI_DBG_FAN, 7611 "fan control: set fan control register to 0x%02x\n", 7612 s); 7613 return rc; 7614 } 7615 7616 static int fan_set_disable(void) 7617 { 7618 int rc; 7619 7620 if (!fan_control_allowed) 7621 return -EPERM; 7622 7623 if (mutex_lock_killable(&fan_mutex)) 7624 return -ERESTARTSYS; 7625 7626 rc = 0; 7627 switch (fan_control_access_mode) { 7628 case TPACPI_FAN_WR_ACPI_FANS: 7629 case TPACPI_FAN_WR_TPEC: 7630 if (!acpi_ec_write(fan_status_offset, 0x00)) 7631 rc = -EIO; 7632 else { 7633 fan_control_desired_level = 0; 7634 tp_features.fan_ctrl_status_undef = 0; 7635 } 7636 break; 7637 7638 case TPACPI_FAN_WR_ACPI_SFAN: 7639 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 7640 rc = -EIO; 7641 else 7642 fan_control_desired_level = 0; 7643 break; 7644 7645 default: 7646 rc = -ENXIO; 7647 } 7648 7649 if (!rc) 7650 vdbg_printk(TPACPI_DBG_FAN, 7651 "fan control: set fan control register to 0\n"); 7652 7653 mutex_unlock(&fan_mutex); 7654 return rc; 7655 } 7656 7657 static int fan_set_speed(int speed) 7658 { 7659 int rc; 7660 7661 if (!fan_control_allowed) 7662 return -EPERM; 7663 7664 if (mutex_lock_killable(&fan_mutex)) 7665 return -ERESTARTSYS; 7666 7667 rc = 0; 7668 switch (fan_control_access_mode) { 7669 case TPACPI_FAN_WR_ACPI_FANS: 7670 if (speed >= 0 && speed <= 65535) { 7671 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 7672 speed, speed, speed)) 7673 rc = -EIO; 7674 } else 7675 rc = -EINVAL; 7676 break; 7677 7678 default: 7679 rc = -ENXIO; 7680 } 7681 7682 mutex_unlock(&fan_mutex); 7683 return rc; 7684 } 7685 7686 static void fan_watchdog_reset(void) 7687 { 7688 static int fan_watchdog_active; 7689 7690 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 7691 return; 7692 7693 if (fan_watchdog_active) 7694 cancel_delayed_work(&fan_watchdog_task); 7695 7696 if (fan_watchdog_maxinterval > 0 && 7697 tpacpi_lifecycle != TPACPI_LIFE_EXITING) { 7698 fan_watchdog_active = 1; 7699 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task, 7700 msecs_to_jiffies(fan_watchdog_maxinterval 7701 * 1000))) { 7702 pr_err("failed to queue the fan watchdog, " 7703 "watchdog will not trigger\n"); 7704 } 7705 } else 7706 fan_watchdog_active = 0; 7707 } 7708 7709 static void fan_watchdog_fire(struct work_struct *ignored) 7710 { 7711 int rc; 7712 7713 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 7714 return; 7715 7716 pr_notice("fan watchdog: enabling fan\n"); 7717 rc = fan_set_enable(); 7718 if (rc < 0) { 7719 pr_err("fan watchdog: error %d while enabling fan, " 7720 "will try again later...\n", -rc); 7721 /* reschedule for later */ 7722 fan_watchdog_reset(); 7723 } 7724 } 7725 7726 /* 7727 * SYSFS fan layout: hwmon compatible (device) 7728 * 7729 * pwm*_enable: 7730 * 0: "disengaged" mode 7731 * 1: manual mode 7732 * 2: native EC "auto" mode (recommended, hardware default) 7733 * 7734 * pwm*: set speed in manual mode, ignored otherwise. 7735 * 0 is level 0; 255 is level 7. Intermediate points done with linear 7736 * interpolation. 7737 * 7738 * fan*_input: tachometer reading, RPM 7739 * 7740 * 7741 * SYSFS fan layout: extensions 7742 * 7743 * fan_watchdog (driver): 7744 * fan watchdog interval in seconds, 0 disables (default), max 120 7745 */ 7746 7747 /* sysfs fan pwm1_enable ----------------------------------------------- */ 7748 static ssize_t fan_pwm1_enable_show(struct device *dev, 7749 struct device_attribute *attr, 7750 char *buf) 7751 { 7752 int res, mode; 7753 u8 status; 7754 7755 res = fan_get_status_safe(&status); 7756 if (res) 7757 return res; 7758 7759 if (status & TP_EC_FAN_FULLSPEED) { 7760 mode = 0; 7761 } else if (status & TP_EC_FAN_AUTO) { 7762 mode = 2; 7763 } else 7764 mode = 1; 7765 7766 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 7767 } 7768 7769 static ssize_t fan_pwm1_enable_store(struct device *dev, 7770 struct device_attribute *attr, 7771 const char *buf, size_t count) 7772 { 7773 unsigned long t; 7774 int res, level; 7775 7776 if (parse_strtoul(buf, 2, &t)) 7777 return -EINVAL; 7778 7779 tpacpi_disclose_usertask("hwmon pwm1_enable", 7780 "set fan mode to %lu\n", t); 7781 7782 switch (t) { 7783 case 0: 7784 level = TP_EC_FAN_FULLSPEED; 7785 break; 7786 case 1: 7787 level = TPACPI_FAN_LAST_LEVEL; 7788 break; 7789 case 2: 7790 level = TP_EC_FAN_AUTO; 7791 break; 7792 case 3: 7793 /* reserved for software-controlled auto mode */ 7794 return -ENOSYS; 7795 default: 7796 return -EINVAL; 7797 } 7798 7799 res = fan_set_level_safe(level); 7800 if (res == -ENXIO) 7801 return -EINVAL; 7802 else if (res < 0) 7803 return res; 7804 7805 fan_watchdog_reset(); 7806 7807 return count; 7808 } 7809 7810 static struct device_attribute dev_attr_fan_pwm1_enable = 7811 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 7812 fan_pwm1_enable_show, fan_pwm1_enable_store); 7813 7814 /* sysfs fan pwm1 ------------------------------------------------------ */ 7815 static ssize_t fan_pwm1_show(struct device *dev, 7816 struct device_attribute *attr, 7817 char *buf) 7818 { 7819 int res; 7820 u8 status; 7821 7822 res = fan_get_status_safe(&status); 7823 if (res) 7824 return res; 7825 7826 if ((status & 7827 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 7828 status = fan_control_desired_level; 7829 7830 if (status > 7) 7831 status = 7; 7832 7833 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 7834 } 7835 7836 static ssize_t fan_pwm1_store(struct device *dev, 7837 struct device_attribute *attr, 7838 const char *buf, size_t count) 7839 { 7840 unsigned long s; 7841 int rc; 7842 u8 status, newlevel; 7843 7844 if (parse_strtoul(buf, 255, &s)) 7845 return -EINVAL; 7846 7847 tpacpi_disclose_usertask("hwmon pwm1", 7848 "set fan speed to %lu\n", s); 7849 7850 /* scale down from 0-255 to 0-7 */ 7851 newlevel = (s >> 5) & 0x07; 7852 7853 if (mutex_lock_killable(&fan_mutex)) 7854 return -ERESTARTSYS; 7855 7856 rc = fan_get_status(&status); 7857 if (!rc && (status & 7858 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7859 rc = fan_set_level(newlevel); 7860 if (rc == -ENXIO) 7861 rc = -EINVAL; 7862 else if (!rc) { 7863 fan_update_desired_level(newlevel); 7864 fan_watchdog_reset(); 7865 } 7866 } 7867 7868 mutex_unlock(&fan_mutex); 7869 return (rc)? rc : count; 7870 } 7871 7872 static struct device_attribute dev_attr_fan_pwm1 = 7873 __ATTR(pwm1, S_IWUSR | S_IRUGO, 7874 fan_pwm1_show, fan_pwm1_store); 7875 7876 /* sysfs fan fan1_input ------------------------------------------------ */ 7877 static ssize_t fan_fan1_input_show(struct device *dev, 7878 struct device_attribute *attr, 7879 char *buf) 7880 { 7881 int res; 7882 unsigned int speed; 7883 7884 res = fan_get_speed(&speed); 7885 if (res < 0) 7886 return res; 7887 7888 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7889 } 7890 7891 static struct device_attribute dev_attr_fan_fan1_input = 7892 __ATTR(fan1_input, S_IRUGO, 7893 fan_fan1_input_show, NULL); 7894 7895 /* sysfs fan fan2_input ------------------------------------------------ */ 7896 static ssize_t fan_fan2_input_show(struct device *dev, 7897 struct device_attribute *attr, 7898 char *buf) 7899 { 7900 int res; 7901 unsigned int speed; 7902 7903 res = fan2_get_speed(&speed); 7904 if (res < 0) 7905 return res; 7906 7907 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7908 } 7909 7910 static struct device_attribute dev_attr_fan_fan2_input = 7911 __ATTR(fan2_input, S_IRUGO, 7912 fan_fan2_input_show, NULL); 7913 7914 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 7915 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 7916 char *buf) 7917 { 7918 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 7919 } 7920 7921 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 7922 const char *buf, size_t count) 7923 { 7924 unsigned long t; 7925 7926 if (parse_strtoul(buf, 120, &t)) 7927 return -EINVAL; 7928 7929 if (!fan_control_allowed) 7930 return -EPERM; 7931 7932 fan_watchdog_maxinterval = t; 7933 fan_watchdog_reset(); 7934 7935 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 7936 7937 return count; 7938 } 7939 7940 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 7941 fan_fan_watchdog_show, fan_fan_watchdog_store); 7942 7943 /* --------------------------------------------------------------------- */ 7944 static struct attribute *fan_attributes[] = { 7945 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr, 7946 &dev_attr_fan_fan1_input.attr, 7947 NULL, /* for fan2_input */ 7948 NULL 7949 }; 7950 7951 static const struct attribute_group fan_attr_group = { 7952 .attrs = fan_attributes, 7953 }; 7954 7955 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 7956 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 7957 7958 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 7959 { .vendor = PCI_VENDOR_ID_IBM, \ 7960 .bios = TPACPI_MATCH_ANY, \ 7961 .ec = TPID(__id1, __id2), \ 7962 .quirks = __quirks } 7963 7964 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 7965 { .vendor = PCI_VENDOR_ID_LENOVO, \ 7966 .bios = TPACPI_MATCH_ANY, \ 7967 .ec = TPID(__id1, __id2), \ 7968 .quirks = __quirks } 7969 7970 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 7971 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 7972 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 7973 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 7974 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 7975 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 7976 }; 7977 7978 #undef TPACPI_FAN_QL 7979 #undef TPACPI_FAN_QI 7980 7981 static int __init fan_init(struct ibm_init_struct *iibm) 7982 { 7983 int rc; 7984 unsigned long quirks; 7985 7986 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 7987 "initializing fan subdriver\n"); 7988 7989 mutex_init(&fan_mutex); 7990 fan_status_access_mode = TPACPI_FAN_NONE; 7991 fan_control_access_mode = TPACPI_FAN_WR_NONE; 7992 fan_control_commands = 0; 7993 fan_watchdog_maxinterval = 0; 7994 tp_features.fan_ctrl_status_undef = 0; 7995 tp_features.second_fan = 0; 7996 fan_control_desired_level = 7; 7997 7998 if (tpacpi_is_ibm()) { 7999 TPACPI_ACPIHANDLE_INIT(fans); 8000 TPACPI_ACPIHANDLE_INIT(gfan); 8001 TPACPI_ACPIHANDLE_INIT(sfan); 8002 } 8003 8004 quirks = tpacpi_check_quirks(fan_quirk_table, 8005 ARRAY_SIZE(fan_quirk_table)); 8006 8007 if (gfan_handle) { 8008 /* 570, 600e/x, 770e, 770x */ 8009 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8010 } else { 8011 /* all other ThinkPads: note that even old-style 8012 * ThinkPad ECs supports the fan control register */ 8013 if (likely(acpi_ec_read(fan_status_offset, 8014 &fan_control_initial_status))) { 8015 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8016 if (quirks & TPACPI_FAN_Q1) 8017 fan_quirk1_setup(); 8018 if (quirks & TPACPI_FAN_2FAN) { 8019 tp_features.second_fan = 1; 8020 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8021 "secondary fan support enabled\n"); 8022 } 8023 } else { 8024 pr_err("ThinkPad ACPI EC access misbehaving, " 8025 "fan status and control unavailable\n"); 8026 return 1; 8027 } 8028 } 8029 8030 if (sfan_handle) { 8031 /* 570, 770x-JL */ 8032 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8033 fan_control_commands |= 8034 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8035 } else { 8036 if (!gfan_handle) { 8037 /* gfan without sfan means no fan control */ 8038 /* all other models implement TP EC 0x2f control */ 8039 8040 if (fans_handle) { 8041 /* X31, X40, X41 */ 8042 fan_control_access_mode = 8043 TPACPI_FAN_WR_ACPI_FANS; 8044 fan_control_commands |= 8045 TPACPI_FAN_CMD_SPEED | 8046 TPACPI_FAN_CMD_LEVEL | 8047 TPACPI_FAN_CMD_ENABLE; 8048 } else { 8049 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8050 fan_control_commands |= 8051 TPACPI_FAN_CMD_LEVEL | 8052 TPACPI_FAN_CMD_ENABLE; 8053 } 8054 } 8055 } 8056 8057 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8058 "fan is %s, modes %d, %d\n", 8059 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8060 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8061 fan_status_access_mode, fan_control_access_mode); 8062 8063 /* fan control master switch */ 8064 if (!fan_control_allowed) { 8065 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8066 fan_control_commands = 0; 8067 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8068 "fan control features disabled by parameter\n"); 8069 } 8070 8071 /* update fan_control_desired_level */ 8072 if (fan_status_access_mode != TPACPI_FAN_NONE) 8073 fan_get_status_safe(NULL); 8074 8075 if (fan_status_access_mode != TPACPI_FAN_NONE || 8076 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8077 if (tp_features.second_fan) { 8078 /* attach second fan tachometer */ 8079 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8080 &dev_attr_fan_fan2_input.attr; 8081 } 8082 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8083 &fan_attr_group); 8084 if (rc < 0) 8085 return rc; 8086 8087 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8088 &driver_attr_fan_watchdog); 8089 if (rc < 0) { 8090 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8091 &fan_attr_group); 8092 return rc; 8093 } 8094 return 0; 8095 } else 8096 return 1; 8097 } 8098 8099 static void fan_exit(void) 8100 { 8101 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8102 "cancelling any pending fan watchdog tasks\n"); 8103 8104 /* FIXME: can we really do this unconditionally? */ 8105 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8106 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8107 &driver_attr_fan_watchdog); 8108 8109 cancel_delayed_work(&fan_watchdog_task); 8110 flush_workqueue(tpacpi_wq); 8111 } 8112 8113 static void fan_suspend(pm_message_t state) 8114 { 8115 int rc; 8116 8117 if (!fan_control_allowed) 8118 return; 8119 8120 /* Store fan status in cache */ 8121 fan_control_resume_level = 0; 8122 rc = fan_get_status_safe(&fan_control_resume_level); 8123 if (rc < 0) 8124 pr_notice("failed to read fan level for later " 8125 "restore during resume: %d\n", rc); 8126 8127 /* if it is undefined, don't attempt to restore it. 8128 * KEEP THIS LAST */ 8129 if (tp_features.fan_ctrl_status_undef) 8130 fan_control_resume_level = 0; 8131 } 8132 8133 static void fan_resume(void) 8134 { 8135 u8 current_level = 7; 8136 bool do_set = false; 8137 int rc; 8138 8139 /* DSDT *always* updates status on resume */ 8140 tp_features.fan_ctrl_status_undef = 0; 8141 8142 if (!fan_control_allowed || 8143 !fan_control_resume_level || 8144 (fan_get_status_safe(¤t_level) < 0)) 8145 return; 8146 8147 switch (fan_control_access_mode) { 8148 case TPACPI_FAN_WR_ACPI_SFAN: 8149 /* never decrease fan level */ 8150 do_set = (fan_control_resume_level > current_level); 8151 break; 8152 case TPACPI_FAN_WR_ACPI_FANS: 8153 case TPACPI_FAN_WR_TPEC: 8154 /* never decrease fan level, scale is: 8155 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8156 * 8157 * We expect the firmware to set either 7 or AUTO, but we 8158 * handle FULLSPEED out of paranoia. 8159 * 8160 * So, we can safely only restore FULLSPEED or 7, anything 8161 * else could slow the fan. Restoring AUTO is useless, at 8162 * best that's exactly what the DSDT already set (it is the 8163 * slower it uses). 8164 * 8165 * Always keep in mind that the DSDT *will* have set the 8166 * fans to what the vendor supposes is the best level. We 8167 * muck with it only to speed the fan up. 8168 */ 8169 if (fan_control_resume_level != 7 && 8170 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8171 return; 8172 else 8173 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8174 (current_level != fan_control_resume_level); 8175 break; 8176 default: 8177 return; 8178 } 8179 if (do_set) { 8180 pr_notice("restoring fan level to 0x%02x\n", 8181 fan_control_resume_level); 8182 rc = fan_set_level_safe(fan_control_resume_level); 8183 if (rc < 0) 8184 pr_notice("failed to restore fan level: %d\n", rc); 8185 } 8186 } 8187 8188 static int fan_read(struct seq_file *m) 8189 { 8190 int rc; 8191 u8 status; 8192 unsigned int speed = 0; 8193 8194 switch (fan_status_access_mode) { 8195 case TPACPI_FAN_RD_ACPI_GFAN: 8196 /* 570, 600e/x, 770e, 770x */ 8197 rc = fan_get_status_safe(&status); 8198 if (rc < 0) 8199 return rc; 8200 8201 seq_printf(m, "status:\t\t%s\n" 8202 "level:\t\t%d\n", 8203 (status != 0) ? "enabled" : "disabled", status); 8204 break; 8205 8206 case TPACPI_FAN_RD_TPEC: 8207 /* all except 570, 600e/x, 770e, 770x */ 8208 rc = fan_get_status_safe(&status); 8209 if (rc < 0) 8210 return rc; 8211 8212 seq_printf(m, "status:\t\t%s\n", 8213 (status != 0) ? "enabled" : "disabled"); 8214 8215 rc = fan_get_speed(&speed); 8216 if (rc < 0) 8217 return rc; 8218 8219 seq_printf(m, "speed:\t\t%d\n", speed); 8220 8221 if (status & TP_EC_FAN_FULLSPEED) 8222 /* Disengaged mode takes precedence */ 8223 seq_printf(m, "level:\t\tdisengaged\n"); 8224 else if (status & TP_EC_FAN_AUTO) 8225 seq_printf(m, "level:\t\tauto\n"); 8226 else 8227 seq_printf(m, "level:\t\t%d\n", status); 8228 break; 8229 8230 case TPACPI_FAN_NONE: 8231 default: 8232 seq_printf(m, "status:\t\tnot supported\n"); 8233 } 8234 8235 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8236 seq_printf(m, "commands:\tlevel <level>"); 8237 8238 switch (fan_control_access_mode) { 8239 case TPACPI_FAN_WR_ACPI_SFAN: 8240 seq_printf(m, " (<level> is 0-7)\n"); 8241 break; 8242 8243 default: 8244 seq_printf(m, " (<level> is 0-7, " 8245 "auto, disengaged, full-speed)\n"); 8246 break; 8247 } 8248 } 8249 8250 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8251 seq_printf(m, "commands:\tenable, disable\n" 8252 "commands:\twatchdog <timeout> (<timeout> " 8253 "is 0 (off), 1-120 (seconds))\n"); 8254 8255 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8256 seq_printf(m, "commands:\tspeed <speed>" 8257 " (<speed> is 0-65535)\n"); 8258 8259 return 0; 8260 } 8261 8262 static int fan_write_cmd_level(const char *cmd, int *rc) 8263 { 8264 int level; 8265 8266 if (strlencmp(cmd, "level auto") == 0) 8267 level = TP_EC_FAN_AUTO; 8268 else if ((strlencmp(cmd, "level disengaged") == 0) | 8269 (strlencmp(cmd, "level full-speed") == 0)) 8270 level = TP_EC_FAN_FULLSPEED; 8271 else if (sscanf(cmd, "level %d", &level) != 1) 8272 return 0; 8273 8274 *rc = fan_set_level_safe(level); 8275 if (*rc == -ENXIO) 8276 pr_err("level command accepted for unsupported access mode %d\n", 8277 fan_control_access_mode); 8278 else if (!*rc) 8279 tpacpi_disclose_usertask("procfs fan", 8280 "set level to %d\n", level); 8281 8282 return 1; 8283 } 8284 8285 static int fan_write_cmd_enable(const char *cmd, int *rc) 8286 { 8287 if (strlencmp(cmd, "enable") != 0) 8288 return 0; 8289 8290 *rc = fan_set_enable(); 8291 if (*rc == -ENXIO) 8292 pr_err("enable command accepted for unsupported access mode %d\n", 8293 fan_control_access_mode); 8294 else if (!*rc) 8295 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8296 8297 return 1; 8298 } 8299 8300 static int fan_write_cmd_disable(const char *cmd, int *rc) 8301 { 8302 if (strlencmp(cmd, "disable") != 0) 8303 return 0; 8304 8305 *rc = fan_set_disable(); 8306 if (*rc == -ENXIO) 8307 pr_err("disable command accepted for unsupported access mode %d\n", 8308 fan_control_access_mode); 8309 else if (!*rc) 8310 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8311 8312 return 1; 8313 } 8314 8315 static int fan_write_cmd_speed(const char *cmd, int *rc) 8316 { 8317 int speed; 8318 8319 /* TODO: 8320 * Support speed <low> <medium> <high> ? */ 8321 8322 if (sscanf(cmd, "speed %d", &speed) != 1) 8323 return 0; 8324 8325 *rc = fan_set_speed(speed); 8326 if (*rc == -ENXIO) 8327 pr_err("speed command accepted for unsupported access mode %d\n", 8328 fan_control_access_mode); 8329 else if (!*rc) 8330 tpacpi_disclose_usertask("procfs fan", 8331 "set speed to %d\n", speed); 8332 8333 return 1; 8334 } 8335 8336 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8337 { 8338 int interval; 8339 8340 if (sscanf(cmd, "watchdog %d", &interval) != 1) 8341 return 0; 8342 8343 if (interval < 0 || interval > 120) 8344 *rc = -EINVAL; 8345 else { 8346 fan_watchdog_maxinterval = interval; 8347 tpacpi_disclose_usertask("procfs fan", 8348 "set watchdog timer to %d\n", 8349 interval); 8350 } 8351 8352 return 1; 8353 } 8354 8355 static int fan_write(char *buf) 8356 { 8357 char *cmd; 8358 int rc = 0; 8359 8360 while (!rc && (cmd = next_cmd(&buf))) { 8361 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 8362 fan_write_cmd_level(cmd, &rc)) && 8363 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 8364 (fan_write_cmd_enable(cmd, &rc) || 8365 fan_write_cmd_disable(cmd, &rc) || 8366 fan_write_cmd_watchdog(cmd, &rc))) && 8367 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 8368 fan_write_cmd_speed(cmd, &rc)) 8369 ) 8370 rc = -EINVAL; 8371 else if (!rc) 8372 fan_watchdog_reset(); 8373 } 8374 8375 return rc; 8376 } 8377 8378 static struct ibm_struct fan_driver_data = { 8379 .name = "fan", 8380 .read = fan_read, 8381 .write = fan_write, 8382 .exit = fan_exit, 8383 .suspend = fan_suspend, 8384 .resume = fan_resume, 8385 }; 8386 8387 /**************************************************************************** 8388 **************************************************************************** 8389 * 8390 * Infrastructure 8391 * 8392 **************************************************************************** 8393 ****************************************************************************/ 8394 8395 /* 8396 * HKEY event callout for other subdrivers go here 8397 * (yes, it is ugly, but it is quick, safe, and gets the job done 8398 */ 8399 static void tpacpi_driver_event(const unsigned int hkey_event) 8400 { 8401 if (ibm_backlight_device) { 8402 switch (hkey_event) { 8403 case TP_HKEY_EV_BRGHT_UP: 8404 case TP_HKEY_EV_BRGHT_DOWN: 8405 tpacpi_brightness_notify_change(); 8406 } 8407 } 8408 if (alsa_card) { 8409 switch (hkey_event) { 8410 case TP_HKEY_EV_VOL_UP: 8411 case TP_HKEY_EV_VOL_DOWN: 8412 case TP_HKEY_EV_VOL_MUTE: 8413 volume_alsa_notify_change(); 8414 } 8415 } 8416 } 8417 8418 static void hotkey_driver_event(const unsigned int scancode) 8419 { 8420 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 8421 } 8422 8423 /* sysfs name ---------------------------------------------------------- */ 8424 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 8425 struct device_attribute *attr, 8426 char *buf) 8427 { 8428 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 8429 } 8430 8431 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name = 8432 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 8433 8434 /* --------------------------------------------------------------------- */ 8435 8436 /* /proc support */ 8437 static struct proc_dir_entry *proc_dir; 8438 8439 /* 8440 * Module and infrastructure proble, init and exit handling 8441 */ 8442 8443 static int force_load; 8444 8445 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 8446 static const char * __init str_supported(int is_supported) 8447 { 8448 static char text_unsupported[] __initdata = "not supported"; 8449 8450 return (is_supported)? &text_unsupported[4] : &text_unsupported[0]; 8451 } 8452 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 8453 8454 static void ibm_exit(struct ibm_struct *ibm) 8455 { 8456 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 8457 8458 list_del_init(&ibm->all_drivers); 8459 8460 if (ibm->flags.acpi_notify_installed) { 8461 dbg_printk(TPACPI_DBG_EXIT, 8462 "%s: acpi_remove_notify_handler\n", ibm->name); 8463 BUG_ON(!ibm->acpi); 8464 acpi_remove_notify_handler(*ibm->acpi->handle, 8465 ibm->acpi->type, 8466 dispatch_acpi_notify); 8467 ibm->flags.acpi_notify_installed = 0; 8468 } 8469 8470 if (ibm->flags.proc_created) { 8471 dbg_printk(TPACPI_DBG_EXIT, 8472 "%s: remove_proc_entry\n", ibm->name); 8473 remove_proc_entry(ibm->name, proc_dir); 8474 ibm->flags.proc_created = 0; 8475 } 8476 8477 if (ibm->flags.acpi_driver_registered) { 8478 dbg_printk(TPACPI_DBG_EXIT, 8479 "%s: acpi_bus_unregister_driver\n", ibm->name); 8480 BUG_ON(!ibm->acpi); 8481 acpi_bus_unregister_driver(ibm->acpi->driver); 8482 kfree(ibm->acpi->driver); 8483 ibm->acpi->driver = NULL; 8484 ibm->flags.acpi_driver_registered = 0; 8485 } 8486 8487 if (ibm->flags.init_called && ibm->exit) { 8488 ibm->exit(); 8489 ibm->flags.init_called = 0; 8490 } 8491 8492 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 8493 } 8494 8495 static int __init ibm_init(struct ibm_init_struct *iibm) 8496 { 8497 int ret; 8498 struct ibm_struct *ibm = iibm->data; 8499 struct proc_dir_entry *entry; 8500 8501 BUG_ON(ibm == NULL); 8502 8503 INIT_LIST_HEAD(&ibm->all_drivers); 8504 8505 if (ibm->flags.experimental && !experimental) 8506 return 0; 8507 8508 dbg_printk(TPACPI_DBG_INIT, 8509 "probing for %s\n", ibm->name); 8510 8511 if (iibm->init) { 8512 ret = iibm->init(iibm); 8513 if (ret > 0) 8514 return 0; /* probe failed */ 8515 if (ret) 8516 return ret; 8517 8518 ibm->flags.init_called = 1; 8519 } 8520 8521 if (ibm->acpi) { 8522 if (ibm->acpi->hid) { 8523 ret = register_tpacpi_subdriver(ibm); 8524 if (ret) 8525 goto err_out; 8526 } 8527 8528 if (ibm->acpi->notify) { 8529 ret = setup_acpi_notify(ibm); 8530 if (ret == -ENODEV) { 8531 pr_notice("disabling subdriver %s\n", 8532 ibm->name); 8533 ret = 0; 8534 goto err_out; 8535 } 8536 if (ret < 0) 8537 goto err_out; 8538 } 8539 } 8540 8541 dbg_printk(TPACPI_DBG_INIT, 8542 "%s installed\n", ibm->name); 8543 8544 if (ibm->read) { 8545 mode_t mode = iibm->base_procfs_mode; 8546 8547 if (!mode) 8548 mode = S_IRUGO; 8549 if (ibm->write) 8550 mode |= S_IWUSR; 8551 entry = proc_create_data(ibm->name, mode, proc_dir, 8552 &dispatch_proc_fops, ibm); 8553 if (!entry) { 8554 pr_err("unable to create proc entry %s\n", ibm->name); 8555 ret = -ENODEV; 8556 goto err_out; 8557 } 8558 ibm->flags.proc_created = 1; 8559 } 8560 8561 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 8562 8563 return 0; 8564 8565 err_out: 8566 dbg_printk(TPACPI_DBG_INIT, 8567 "%s: at error exit path with result %d\n", 8568 ibm->name, ret); 8569 8570 ibm_exit(ibm); 8571 return (ret < 0)? ret : 0; 8572 } 8573 8574 /* Probing */ 8575 8576 static bool __pure __init tpacpi_is_fw_digit(const char c) 8577 { 8578 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 8579 } 8580 8581 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */ 8582 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s, 8583 const char t) 8584 { 8585 return s && strlen(s) >= 8 && 8586 tpacpi_is_fw_digit(s[0]) && 8587 tpacpi_is_fw_digit(s[1]) && 8588 s[2] == t && s[3] == 'T' && 8589 tpacpi_is_fw_digit(s[4]) && 8590 tpacpi_is_fw_digit(s[5]); 8591 } 8592 8593 /* returns 0 - probe ok, or < 0 - probe error. 8594 * Probe ok doesn't mean thinkpad found. 8595 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 8596 static int __must_check __init get_thinkpad_model_data( 8597 struct thinkpad_id_data *tp) 8598 { 8599 const struct dmi_device *dev = NULL; 8600 char ec_fw_string[18]; 8601 char const *s; 8602 8603 if (!tp) 8604 return -EINVAL; 8605 8606 memset(tp, 0, sizeof(*tp)); 8607 8608 if (dmi_name_in_vendors("IBM")) 8609 tp->vendor = PCI_VENDOR_ID_IBM; 8610 else if (dmi_name_in_vendors("LENOVO")) 8611 tp->vendor = PCI_VENDOR_ID_LENOVO; 8612 else 8613 return 0; 8614 8615 s = dmi_get_system_info(DMI_BIOS_VERSION); 8616 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 8617 if (s && !tp->bios_version_str) 8618 return -ENOMEM; 8619 8620 /* Really ancient ThinkPad 240X will fail this, which is fine */ 8621 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E')) 8622 return 0; 8623 8624 tp->bios_model = tp->bios_version_str[0] 8625 | (tp->bios_version_str[1] << 8); 8626 tp->bios_release = (tp->bios_version_str[4] << 8) 8627 | tp->bios_version_str[5]; 8628 8629 /* 8630 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 8631 * X32 or newer, all Z series; Some models must have an 8632 * up-to-date BIOS or they will not be detected. 8633 * 8634 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 8635 */ 8636 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 8637 if (sscanf(dev->name, 8638 "IBM ThinkPad Embedded Controller -[%17c", 8639 ec_fw_string) == 1) { 8640 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 8641 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 8642 8643 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 8644 if (!tp->ec_version_str) 8645 return -ENOMEM; 8646 8647 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 8648 tp->ec_model = ec_fw_string[0] 8649 | (ec_fw_string[1] << 8); 8650 tp->ec_release = (ec_fw_string[4] << 8) 8651 | ec_fw_string[5]; 8652 } else { 8653 pr_notice("ThinkPad firmware release %s " 8654 "doesn't match the known patterns\n", 8655 ec_fw_string); 8656 pr_notice("please report this to %s\n", 8657 TPACPI_MAIL); 8658 } 8659 break; 8660 } 8661 } 8662 8663 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 8664 if (s && !strnicmp(s, "ThinkPad", 8)) { 8665 tp->model_str = kstrdup(s, GFP_KERNEL); 8666 if (!tp->model_str) 8667 return -ENOMEM; 8668 } 8669 8670 s = dmi_get_system_info(DMI_PRODUCT_NAME); 8671 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 8672 if (s && !tp->nummodel_str) 8673 return -ENOMEM; 8674 8675 return 0; 8676 } 8677 8678 static int __init probe_for_thinkpad(void) 8679 { 8680 int is_thinkpad; 8681 8682 if (acpi_disabled) 8683 return -ENODEV; 8684 8685 /* It would be dangerous to run the driver in this case */ 8686 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 8687 return -ENODEV; 8688 8689 /* 8690 * Non-ancient models have better DMI tagging, but very old models 8691 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 8692 */ 8693 is_thinkpad = (thinkpad_id.model_str != NULL) || 8694 (thinkpad_id.ec_model != 0) || 8695 tpacpi_is_fw_known(); 8696 8697 /* The EC handler is required */ 8698 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 8699 if (!ec_handle) { 8700 if (is_thinkpad) 8701 pr_err("Not yet supported ThinkPad detected!\n"); 8702 return -ENODEV; 8703 } 8704 8705 if (!is_thinkpad && !force_load) 8706 return -ENODEV; 8707 8708 return 0; 8709 } 8710 8711 static void __init thinkpad_acpi_init_banner(void) 8712 { 8713 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 8714 pr_info("%s\n", TPACPI_URL); 8715 8716 pr_info("ThinkPad BIOS %s, EC %s\n", 8717 (thinkpad_id.bios_version_str) ? 8718 thinkpad_id.bios_version_str : "unknown", 8719 (thinkpad_id.ec_version_str) ? 8720 thinkpad_id.ec_version_str : "unknown"); 8721 8722 BUG_ON(!thinkpad_id.vendor); 8723 8724 if (thinkpad_id.model_str) 8725 pr_info("%s %s, model %s\n", 8726 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 8727 "IBM" : ((thinkpad_id.vendor == 8728 PCI_VENDOR_ID_LENOVO) ? 8729 "Lenovo" : "Unknown vendor"), 8730 thinkpad_id.model_str, 8731 (thinkpad_id.nummodel_str) ? 8732 thinkpad_id.nummodel_str : "unknown"); 8733 } 8734 8735 /* Module init, exit, parameters */ 8736 8737 static struct ibm_init_struct ibms_init[] __initdata = { 8738 { 8739 .data = &thinkpad_acpi_driver_data, 8740 }, 8741 { 8742 .init = hotkey_init, 8743 .data = &hotkey_driver_data, 8744 }, 8745 { 8746 .init = bluetooth_init, 8747 .data = &bluetooth_driver_data, 8748 }, 8749 { 8750 .init = wan_init, 8751 .data = &wan_driver_data, 8752 }, 8753 { 8754 .init = uwb_init, 8755 .data = &uwb_driver_data, 8756 }, 8757 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 8758 { 8759 .init = video_init, 8760 .base_procfs_mode = S_IRUSR, 8761 .data = &video_driver_data, 8762 }, 8763 #endif 8764 { 8765 .init = light_init, 8766 .data = &light_driver_data, 8767 }, 8768 { 8769 .init = cmos_init, 8770 .data = &cmos_driver_data, 8771 }, 8772 { 8773 .init = led_init, 8774 .data = &led_driver_data, 8775 }, 8776 { 8777 .init = beep_init, 8778 .data = &beep_driver_data, 8779 }, 8780 { 8781 .init = thermal_init, 8782 .data = &thermal_driver_data, 8783 }, 8784 { 8785 .init = brightness_init, 8786 .data = &brightness_driver_data, 8787 }, 8788 { 8789 .init = volume_init, 8790 .data = &volume_driver_data, 8791 }, 8792 { 8793 .init = fan_init, 8794 .data = &fan_driver_data, 8795 }, 8796 }; 8797 8798 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 8799 { 8800 unsigned int i; 8801 struct ibm_struct *ibm; 8802 8803 if (!kp || !kp->name || !val) 8804 return -EINVAL; 8805 8806 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 8807 ibm = ibms_init[i].data; 8808 WARN_ON(ibm == NULL); 8809 8810 if (!ibm || !ibm->name) 8811 continue; 8812 8813 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 8814 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 8815 return -ENOSPC; 8816 strcpy(ibms_init[i].param, val); 8817 strcat(ibms_init[i].param, ","); 8818 return 0; 8819 } 8820 } 8821 8822 return -EINVAL; 8823 } 8824 8825 module_param(experimental, int, 0444); 8826 MODULE_PARM_DESC(experimental, 8827 "Enables experimental features when non-zero"); 8828 8829 module_param_named(debug, dbg_level, uint, 0); 8830 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 8831 8832 module_param(force_load, bool, 0444); 8833 MODULE_PARM_DESC(force_load, 8834 "Attempts to load the driver even on a " 8835 "mis-identified ThinkPad when true"); 8836 8837 module_param_named(fan_control, fan_control_allowed, bool, 0444); 8838 MODULE_PARM_DESC(fan_control, 8839 "Enables setting fan parameters features when true"); 8840 8841 module_param_named(brightness_mode, brightness_mode, uint, 0444); 8842 MODULE_PARM_DESC(brightness_mode, 8843 "Selects brightness control strategy: " 8844 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 8845 8846 module_param(brightness_enable, uint, 0444); 8847 MODULE_PARM_DESC(brightness_enable, 8848 "Enables backlight control when 1, disables when 0"); 8849 8850 module_param(hotkey_report_mode, uint, 0444); 8851 MODULE_PARM_DESC(hotkey_report_mode, 8852 "used for backwards compatibility with userspace, " 8853 "see documentation"); 8854 8855 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 8856 module_param_named(volume_mode, volume_mode, uint, 0444); 8857 MODULE_PARM_DESC(volume_mode, 8858 "Selects volume control strategy: " 8859 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 8860 8861 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 8862 MODULE_PARM_DESC(volume_capabilities, 8863 "Selects the mixer capabilites: " 8864 "0=auto, 1=volume and mute, 2=mute only"); 8865 8866 module_param_named(volume_control, volume_control_allowed, bool, 0444); 8867 MODULE_PARM_DESC(volume_control, 8868 "Enables software override for the console audio " 8869 "control when true"); 8870 8871 /* ALSA module API parameters */ 8872 module_param_named(index, alsa_index, int, 0444); 8873 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 8874 module_param_named(id, alsa_id, charp, 0444); 8875 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 8876 module_param_named(enable, alsa_enable, bool, 0444); 8877 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 8878 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 8879 8880 #define TPACPI_PARAM(feature) \ 8881 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 8882 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 8883 "at module load, see documentation") 8884 8885 TPACPI_PARAM(hotkey); 8886 TPACPI_PARAM(bluetooth); 8887 TPACPI_PARAM(video); 8888 TPACPI_PARAM(light); 8889 TPACPI_PARAM(cmos); 8890 TPACPI_PARAM(led); 8891 TPACPI_PARAM(beep); 8892 TPACPI_PARAM(brightness); 8893 TPACPI_PARAM(volume); 8894 TPACPI_PARAM(fan); 8895 8896 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 8897 module_param(dbg_wlswemul, uint, 0444); 8898 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 8899 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 8900 MODULE_PARM_DESC(wlsw_state, 8901 "Initial state of the emulated WLSW switch"); 8902 8903 module_param(dbg_bluetoothemul, uint, 0444); 8904 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 8905 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 8906 MODULE_PARM_DESC(bluetooth_state, 8907 "Initial state of the emulated bluetooth switch"); 8908 8909 module_param(dbg_wwanemul, uint, 0444); 8910 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 8911 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 8912 MODULE_PARM_DESC(wwan_state, 8913 "Initial state of the emulated WWAN switch"); 8914 8915 module_param(dbg_uwbemul, uint, 0444); 8916 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 8917 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 8918 MODULE_PARM_DESC(uwb_state, 8919 "Initial state of the emulated UWB switch"); 8920 #endif 8921 8922 static void thinkpad_acpi_module_exit(void) 8923 { 8924 struct ibm_struct *ibm, *itmp; 8925 8926 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 8927 8928 list_for_each_entry_safe_reverse(ibm, itmp, 8929 &tpacpi_all_drivers, 8930 all_drivers) { 8931 ibm_exit(ibm); 8932 } 8933 8934 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 8935 8936 if (tpacpi_inputdev) { 8937 if (tp_features.input_device_registered) 8938 input_unregister_device(tpacpi_inputdev); 8939 else 8940 input_free_device(tpacpi_inputdev); 8941 } 8942 8943 if (tpacpi_hwmon) 8944 hwmon_device_unregister(tpacpi_hwmon); 8945 8946 if (tp_features.sensors_pdev_attrs_registered) 8947 device_remove_file(&tpacpi_sensors_pdev->dev, 8948 &dev_attr_thinkpad_acpi_pdev_name); 8949 if (tpacpi_sensors_pdev) 8950 platform_device_unregister(tpacpi_sensors_pdev); 8951 if (tpacpi_pdev) 8952 platform_device_unregister(tpacpi_pdev); 8953 8954 if (tp_features.sensors_pdrv_attrs_registered) 8955 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 8956 if (tp_features.platform_drv_attrs_registered) 8957 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 8958 8959 if (tp_features.sensors_pdrv_registered) 8960 platform_driver_unregister(&tpacpi_hwmon_pdriver); 8961 8962 if (tp_features.platform_drv_registered) 8963 platform_driver_unregister(&tpacpi_pdriver); 8964 8965 if (proc_dir) 8966 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 8967 8968 if (tpacpi_wq) 8969 destroy_workqueue(tpacpi_wq); 8970 8971 kfree(thinkpad_id.bios_version_str); 8972 kfree(thinkpad_id.ec_version_str); 8973 kfree(thinkpad_id.model_str); 8974 } 8975 8976 8977 static int __init thinkpad_acpi_module_init(void) 8978 { 8979 int ret, i; 8980 8981 tpacpi_lifecycle = TPACPI_LIFE_INIT; 8982 8983 /* Parameter checking */ 8984 if (hotkey_report_mode > 2) 8985 return -EINVAL; 8986 8987 /* Driver-level probe */ 8988 8989 ret = get_thinkpad_model_data(&thinkpad_id); 8990 if (ret) { 8991 pr_err("unable to get DMI data: %d\n", ret); 8992 thinkpad_acpi_module_exit(); 8993 return ret; 8994 } 8995 ret = probe_for_thinkpad(); 8996 if (ret) { 8997 thinkpad_acpi_module_exit(); 8998 return ret; 8999 } 9000 9001 /* Driver initialization */ 9002 9003 thinkpad_acpi_init_banner(); 9004 tpacpi_check_outdated_fw(); 9005 9006 TPACPI_ACPIHANDLE_INIT(ecrd); 9007 TPACPI_ACPIHANDLE_INIT(ecwr); 9008 9009 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 9010 if (!tpacpi_wq) { 9011 thinkpad_acpi_module_exit(); 9012 return -ENOMEM; 9013 } 9014 9015 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 9016 if (!proc_dir) { 9017 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 9018 thinkpad_acpi_module_exit(); 9019 return -ENODEV; 9020 } 9021 9022 ret = platform_driver_register(&tpacpi_pdriver); 9023 if (ret) { 9024 pr_err("unable to register main platform driver\n"); 9025 thinkpad_acpi_module_exit(); 9026 return ret; 9027 } 9028 tp_features.platform_drv_registered = 1; 9029 9030 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 9031 if (ret) { 9032 pr_err("unable to register hwmon platform driver\n"); 9033 thinkpad_acpi_module_exit(); 9034 return ret; 9035 } 9036 tp_features.sensors_pdrv_registered = 1; 9037 9038 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 9039 if (!ret) { 9040 tp_features.platform_drv_attrs_registered = 1; 9041 ret = tpacpi_create_driver_attributes( 9042 &tpacpi_hwmon_pdriver.driver); 9043 } 9044 if (ret) { 9045 pr_err("unable to create sysfs driver attributes\n"); 9046 thinkpad_acpi_module_exit(); 9047 return ret; 9048 } 9049 tp_features.sensors_pdrv_attrs_registered = 1; 9050 9051 9052 /* Device initialization */ 9053 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9054 NULL, 0); 9055 if (IS_ERR(tpacpi_pdev)) { 9056 ret = PTR_ERR(tpacpi_pdev); 9057 tpacpi_pdev = NULL; 9058 pr_err("unable to register platform device\n"); 9059 thinkpad_acpi_module_exit(); 9060 return ret; 9061 } 9062 tpacpi_sensors_pdev = platform_device_register_simple( 9063 TPACPI_HWMON_DRVR_NAME, 9064 -1, NULL, 0); 9065 if (IS_ERR(tpacpi_sensors_pdev)) { 9066 ret = PTR_ERR(tpacpi_sensors_pdev); 9067 tpacpi_sensors_pdev = NULL; 9068 pr_err("unable to register hwmon platform device\n"); 9069 thinkpad_acpi_module_exit(); 9070 return ret; 9071 } 9072 ret = device_create_file(&tpacpi_sensors_pdev->dev, 9073 &dev_attr_thinkpad_acpi_pdev_name); 9074 if (ret) { 9075 pr_err("unable to create sysfs hwmon device attributes\n"); 9076 thinkpad_acpi_module_exit(); 9077 return ret; 9078 } 9079 tp_features.sensors_pdev_attrs_registered = 1; 9080 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9081 if (IS_ERR(tpacpi_hwmon)) { 9082 ret = PTR_ERR(tpacpi_hwmon); 9083 tpacpi_hwmon = NULL; 9084 pr_err("unable to register hwmon device\n"); 9085 thinkpad_acpi_module_exit(); 9086 return ret; 9087 } 9088 mutex_init(&tpacpi_inputdev_send_mutex); 9089 tpacpi_inputdev = input_allocate_device(); 9090 if (!tpacpi_inputdev) { 9091 pr_err("unable to allocate input device\n"); 9092 thinkpad_acpi_module_exit(); 9093 return -ENOMEM; 9094 } else { 9095 /* Prepare input device, but don't register */ 9096 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9097 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9098 tpacpi_inputdev->id.bustype = BUS_HOST; 9099 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9100 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9101 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9102 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9103 } 9104 9105 /* Init subdriver dependencies */ 9106 tpacpi_detect_brightness_capabilities(); 9107 9108 /* Init subdrivers */ 9109 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9110 ret = ibm_init(&ibms_init[i]); 9111 if (ret >= 0 && *ibms_init[i].param) 9112 ret = ibms_init[i].data->write(ibms_init[i].param); 9113 if (ret < 0) { 9114 thinkpad_acpi_module_exit(); 9115 return ret; 9116 } 9117 } 9118 9119 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9120 9121 ret = input_register_device(tpacpi_inputdev); 9122 if (ret < 0) { 9123 pr_err("unable to register input device\n"); 9124 thinkpad_acpi_module_exit(); 9125 return ret; 9126 } else { 9127 tp_features.input_device_registered = 1; 9128 } 9129 9130 return 0; 9131 } 9132 9133 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9134 9135 /* 9136 * This will autoload the driver in almost every ThinkPad 9137 * in widespread use. 9138 * 9139 * Only _VERY_ old models, like the 240, 240x and 570 lack 9140 * the HKEY event interface. 9141 */ 9142 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9143 9144 /* 9145 * DMI matching for module autoloading 9146 * 9147 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9148 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9149 * 9150 * Only models listed in thinkwiki will be supported, so add yours 9151 * if it is not there yet. 9152 */ 9153 #define IBM_BIOS_MODULE_ALIAS(__type) \ 9154 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9155 9156 /* Ancient thinkpad BIOSes have to be identified by 9157 * BIOS type or model number, and there are far less 9158 * BIOS types than model numbers... */ 9159 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9160 9161 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9162 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9163 MODULE_DESCRIPTION(TPACPI_DESC); 9164 MODULE_VERSION(TPACPI_VERSION); 9165 MODULE_LICENSE("GPL"); 9166 9167 module_init(thinkpad_acpi_module_init); 9168 module_exit(thinkpad_acpi_module_exit); 9169