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 TPACPI_VERSION "0.24" 25#define TPACPI_SYSFS_VERSION 0x020700 26 27/* 28 * Changelog: 29 * 2007-10-20 changelog trimmed down 30 * 31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 32 * drivers/misc. 33 * 34 * 2006-11-22 0.13 new maintainer 35 * changelog now lives in git commit history, and will 36 * not be updated further in-file. 37 * 38 * 2005-03-17 0.11 support for 600e, 770x 39 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 40 * 41 * 2005-01-16 0.9 use MODULE_VERSION 42 * thanks to Henrik Brix Andersen <brix@gentoo.org> 43 * fix parameter passing on module loading 44 * thanks to Rusty Russell <rusty@rustcorp.com.au> 45 * thanks to Jim Radford <radford@blackbean.org> 46 * 2004-11-08 0.8 fix init error case, don't return from a macro 47 * thanks to Chris Wright <chrisw@osdl.org> 48 */ 49 50#include <linux/kernel.h> 51#include <linux/module.h> 52#include <linux/init.h> 53#include <linux/types.h> 54#include <linux/string.h> 55#include <linux/list.h> 56#include <linux/mutex.h> 57#include <linux/sched.h> 58#include <linux/kthread.h> 59#include <linux/freezer.h> 60#include <linux/delay.h> 61#include <linux/slab.h> 62 63#include <linux/nvram.h> 64#include <linux/proc_fs.h> 65#include <linux/seq_file.h> 66#include <linux/sysfs.h> 67#include <linux/backlight.h> 68#include <linux/fb.h> 69#include <linux/platform_device.h> 70#include <linux/hwmon.h> 71#include <linux/hwmon-sysfs.h> 72#include <linux/input.h> 73#include <linux/leds.h> 74#include <linux/rfkill.h> 75#include <asm/uaccess.h> 76 77#include <linux/dmi.h> 78#include <linux/jiffies.h> 79#include <linux/workqueue.h> 80 81#include <sound/core.h> 82#include <sound/control.h> 83#include <sound/initval.h> 84 85#include <acpi/acpi_drivers.h> 86 87#include <linux/pci_ids.h> 88 89 90/* ThinkPad CMOS commands */ 91#define TP_CMOS_VOLUME_DOWN 0 92#define TP_CMOS_VOLUME_UP 1 93#define TP_CMOS_VOLUME_MUTE 2 94#define TP_CMOS_BRIGHTNESS_UP 4 95#define TP_CMOS_BRIGHTNESS_DOWN 5 96#define TP_CMOS_THINKLIGHT_ON 12 97#define TP_CMOS_THINKLIGHT_OFF 13 98 99/* NVRAM Addresses */ 100enum tp_nvram_addr { 101 TP_NVRAM_ADDR_HK2 = 0x57, 102 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 103 TP_NVRAM_ADDR_VIDEO = 0x59, 104 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 105 TP_NVRAM_ADDR_MIXER = 0x60, 106}; 107 108/* NVRAM bit masks */ 109enum { 110 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 111 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 112 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 113 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 114 TP_NVRAM_MASK_THINKLIGHT = 0x10, 115 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 116 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 117 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 118 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 119 TP_NVRAM_MASK_MUTE = 0x40, 120 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 121 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 122 TP_NVRAM_POS_LEVEL_VOLUME = 0, 123}; 124 125/* Misc NVRAM-related */ 126enum { 127 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 128}; 129 130/* ACPI HIDs */ 131#define TPACPI_ACPI_HKEY_HID "IBM0068" 132#define TPACPI_ACPI_EC_HID "PNP0C09" 133 134/* Input IDs */ 135#define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 136#define TPACPI_HKEY_INPUT_VERSION 0x4101 137 138/* ACPI \WGSV commands */ 139enum { 140 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 141 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 142 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 143 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 144}; 145 146/* TP_ACPI_WGSV_GET_STATE bits */ 147enum { 148 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 149 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 150 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 151 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 152 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 153 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 154 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 155 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 156 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 157 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 158}; 159 160/* HKEY events */ 161enum tpacpi_hkey_event_t { 162 /* Hotkey-related */ 163 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 164 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 165 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 166 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 167 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 168 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 169 170 /* Reasons for waking up from S3/S4 */ 171 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 172 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 173 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 174 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 175 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 176 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 177 178 /* Auto-sleep after eject request */ 179 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 180 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 181 182 /* Misc bay events */ 183 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 184 185 /* User-interface events */ 186 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 187 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 188 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 189 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 190 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 191 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 192 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 193 194 /* Thermal events */ 195 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 196 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 197 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 198 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 199 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 200 201 /* Misc */ 202 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 203}; 204 205/**************************************************************************** 206 * Main driver 207 */ 208 209#define TPACPI_NAME "thinkpad" 210#define TPACPI_DESC "ThinkPad ACPI Extras" 211#define TPACPI_FILE TPACPI_NAME "_acpi" 212#define TPACPI_URL "http://ibm-acpi.sf.net/" 213#define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 214 215#define TPACPI_PROC_DIR "ibm" 216#define TPACPI_ACPI_EVENT_PREFIX "ibm" 217#define TPACPI_DRVR_NAME TPACPI_FILE 218#define TPACPI_DRVR_SHORTNAME "tpacpi" 219#define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 220 221#define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 222#define TPACPI_WORKQUEUE_NAME "ktpacpid" 223 224#define TPACPI_MAX_ACPI_ARGS 3 225 226/* printk headers */ 227#define TPACPI_LOG TPACPI_FILE ": " 228#define TPACPI_EMERG KERN_EMERG TPACPI_LOG 229#define TPACPI_ALERT KERN_ALERT TPACPI_LOG 230#define TPACPI_CRIT KERN_CRIT TPACPI_LOG 231#define TPACPI_ERR KERN_ERR TPACPI_LOG 232#define TPACPI_WARN KERN_WARNING TPACPI_LOG 233#define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG 234#define TPACPI_INFO KERN_INFO TPACPI_LOG 235#define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG 236 237/* Debugging printk groups */ 238#define TPACPI_DBG_ALL 0xffff 239#define TPACPI_DBG_DISCLOSETASK 0x8000 240#define TPACPI_DBG_INIT 0x0001 241#define TPACPI_DBG_EXIT 0x0002 242#define TPACPI_DBG_RFKILL 0x0004 243#define TPACPI_DBG_HKEY 0x0008 244#define TPACPI_DBG_FAN 0x0010 245#define TPACPI_DBG_BRGHT 0x0020 246#define TPACPI_DBG_MIXER 0x0040 247 248#define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 249#define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 250#define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 251 252 253/**************************************************************************** 254 * Driver-wide structs and misc. variables 255 */ 256 257struct ibm_struct; 258 259struct tp_acpi_drv_struct { 260 const struct acpi_device_id *hid; 261 struct acpi_driver *driver; 262 263 void (*notify) (struct ibm_struct *, u32); 264 acpi_handle *handle; 265 u32 type; 266 struct acpi_device *device; 267}; 268 269struct ibm_struct { 270 char *name; 271 272 int (*read) (struct seq_file *); 273 int (*write) (char *); 274 void (*exit) (void); 275 void (*resume) (void); 276 void (*suspend) (pm_message_t state); 277 void (*shutdown) (void); 278 279 struct list_head all_drivers; 280 281 struct tp_acpi_drv_struct *acpi; 282 283 struct { 284 u8 acpi_driver_registered:1; 285 u8 acpi_notify_installed:1; 286 u8 proc_created:1; 287 u8 init_called:1; 288 u8 experimental:1; 289 } flags; 290}; 291 292struct ibm_init_struct { 293 char param[32]; 294 295 int (*init) (struct ibm_init_struct *); 296 mode_t base_procfs_mode; 297 struct ibm_struct *data; 298}; 299 300static struct { 301 u32 bluetooth:1; 302 u32 hotkey:1; 303 u32 hotkey_mask:1; 304 u32 hotkey_wlsw:1; 305 u32 hotkey_tablet:1; 306 u32 light:1; 307 u32 light_status:1; 308 u32 bright_acpimode:1; 309 u32 bright_unkfw:1; 310 u32 wan:1; 311 u32 uwb:1; 312 u32 fan_ctrl_status_undef:1; 313 u32 second_fan:1; 314 u32 beep_needs_two_args:1; 315 u32 mixer_no_level_control:1; 316 u32 input_device_registered:1; 317 u32 platform_drv_registered:1; 318 u32 platform_drv_attrs_registered:1; 319 u32 sensors_pdrv_registered:1; 320 u32 sensors_pdrv_attrs_registered:1; 321 u32 sensors_pdev_attrs_registered:1; 322 u32 hotkey_poll_active:1; 323} tp_features; 324 325static struct { 326 u16 hotkey_mask_ff:1; 327 u16 volume_ctrl_forbidden:1; 328} tp_warned; 329 330struct thinkpad_id_data { 331 unsigned int vendor; /* ThinkPad vendor: 332 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 333 334 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 335 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 336 337 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 338 u16 ec_model; 339 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 340 u16 ec_release; 341 342 char *model_str; /* ThinkPad T43 */ 343 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 344}; 345static struct thinkpad_id_data thinkpad_id; 346 347static enum { 348 TPACPI_LIFE_INIT = 0, 349 TPACPI_LIFE_RUNNING, 350 TPACPI_LIFE_EXITING, 351} tpacpi_lifecycle; 352 353static int experimental; 354static u32 dbg_level; 355 356static struct workqueue_struct *tpacpi_wq; 357 358enum led_status_t { 359 TPACPI_LED_OFF = 0, 360 TPACPI_LED_ON, 361 TPACPI_LED_BLINK, 362}; 363 364/* Special LED class that can defer work */ 365struct tpacpi_led_classdev { 366 struct led_classdev led_classdev; 367 struct work_struct work; 368 enum led_status_t new_state; 369 unsigned int led; 370}; 371 372/* brightness level capabilities */ 373static unsigned int bright_maxlvl; /* 0 = unknown */ 374 375#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 376static int dbg_wlswemul; 377static int tpacpi_wlsw_emulstate; 378static int dbg_bluetoothemul; 379static int tpacpi_bluetooth_emulstate; 380static int dbg_wwanemul; 381static int tpacpi_wwan_emulstate; 382static int dbg_uwbemul; 383static int tpacpi_uwb_emulstate; 384#endif 385 386 387/************************************************************************* 388 * Debugging helpers 389 */ 390 391#define dbg_printk(a_dbg_level, format, arg...) \ 392 do { if (dbg_level & (a_dbg_level)) \ 393 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \ 394 } while (0) 395 396#ifdef CONFIG_THINKPAD_ACPI_DEBUG 397#define vdbg_printk dbg_printk 398static const char *str_supported(int is_supported); 399#else 400#define vdbg_printk(a_dbg_level, format, arg...) \ 401 do { } while (0) 402#endif 403 404static void tpacpi_log_usertask(const char * const what) 405{ 406 printk(TPACPI_DEBUG "%s: access by process with PID %d\n", 407 what, task_tgid_vnr(current)); 408} 409 410#define tpacpi_disclose_usertask(what, format, arg...) \ 411 do { \ 412 if (unlikely( \ 413 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 414 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 415 printk(TPACPI_DEBUG "%s: PID %d: " format, \ 416 what, task_tgid_vnr(current), ## arg); \ 417 } \ 418 } while (0) 419 420/* 421 * Quirk handling helpers 422 * 423 * ThinkPad IDs and versions seen in the field so far 424 * are two-characters from the set [0-9A-Z], i.e. base 36. 425 * 426 * We use values well outside that range as specials. 427 */ 428 429#define TPACPI_MATCH_ANY 0xffffU 430#define TPACPI_MATCH_UNKNOWN 0U 431 432/* TPID('1', 'Y') == 0x5931 */ 433#define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 434 435#define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 436 { .vendor = PCI_VENDOR_ID_IBM, \ 437 .bios = TPID(__id1, __id2), \ 438 .ec = TPACPI_MATCH_ANY, \ 439 .quirks = (__quirk) } 440 441#define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 442 { .vendor = PCI_VENDOR_ID_LENOVO, \ 443 .bios = TPID(__id1, __id2), \ 444 .ec = TPACPI_MATCH_ANY, \ 445 .quirks = (__quirk) } 446 447#define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 448 { .vendor = PCI_VENDOR_ID_LENOVO, \ 449 .bios = TPACPI_MATCH_ANY, \ 450 .ec = TPID(__id1, __id2), \ 451 .quirks = (__quirk) } 452 453struct tpacpi_quirk { 454 unsigned int vendor; 455 u16 bios; 456 u16 ec; 457 unsigned long quirks; 458}; 459 460/** 461 * tpacpi_check_quirks() - search BIOS/EC version on a list 462 * @qlist: array of &struct tpacpi_quirk 463 * @qlist_size: number of elements in @qlist 464 * 465 * Iterates over a quirks list until one is found that matches the 466 * ThinkPad's vendor, BIOS and EC model. 467 * 468 * Returns 0 if nothing matches, otherwise returns the quirks field of 469 * the matching &struct tpacpi_quirk entry. 470 * 471 * The match criteria is: vendor, ec and bios much match. 472 */ 473static unsigned long __init tpacpi_check_quirks( 474 const struct tpacpi_quirk *qlist, 475 unsigned int qlist_size) 476{ 477 while (qlist_size) { 478 if ((qlist->vendor == thinkpad_id.vendor || 479 qlist->vendor == TPACPI_MATCH_ANY) && 480 (qlist->bios == thinkpad_id.bios_model || 481 qlist->bios == TPACPI_MATCH_ANY) && 482 (qlist->ec == thinkpad_id.ec_model || 483 qlist->ec == TPACPI_MATCH_ANY)) 484 return qlist->quirks; 485 486 qlist_size--; 487 qlist++; 488 } 489 return 0; 490} 491 492static inline bool __pure __init tpacpi_is_lenovo(void) 493{ 494 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 495} 496 497static inline bool __pure __init tpacpi_is_ibm(void) 498{ 499 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 500} 501 502/**************************************************************************** 503 **************************************************************************** 504 * 505 * ACPI Helpers and device model 506 * 507 **************************************************************************** 508 ****************************************************************************/ 509 510/************************************************************************* 511 * ACPI basic handles 512 */ 513 514static acpi_handle root_handle; 515static acpi_handle ec_handle; 516 517#define TPACPI_HANDLE(object, parent, paths...) \ 518 static acpi_handle object##_handle; \ 519 static const acpi_handle *object##_parent __initdata = \ 520 &parent##_handle; \ 521 static char *object##_paths[] __initdata = { paths } 522 523TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 524TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 525 526TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 527 /* T4x, X31, X40 */ 528 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 529 "\\CMS", /* R40, R40e */ 530 ); /* all others */ 531 532TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 533 "^HKEY", /* R30, R31 */ 534 "HKEY", /* all others */ 535 ); /* 570 */ 536 537TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */ 538 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 539 "\\_SB.PCI0.VID0", /* 770e */ 540 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 541 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 542 "\\_SB.PCI0.AGP.VID", /* all others */ 543 ); /* R30, R31 */ 544 545 546/************************************************************************* 547 * ACPI helpers 548 */ 549 550static int acpi_evalf(acpi_handle handle, 551 void *res, char *method, char *fmt, ...) 552{ 553 char *fmt0 = fmt; 554 struct acpi_object_list params; 555 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 556 struct acpi_buffer result, *resultp; 557 union acpi_object out_obj; 558 acpi_status status; 559 va_list ap; 560 char res_type; 561 int success; 562 int quiet; 563 564 if (!*fmt) { 565 printk(TPACPI_ERR "acpi_evalf() called with empty format\n"); 566 return 0; 567 } 568 569 if (*fmt == 'q') { 570 quiet = 1; 571 fmt++; 572 } else 573 quiet = 0; 574 575 res_type = *(fmt++); 576 577 params.count = 0; 578 params.pointer = &in_objs[0]; 579 580 va_start(ap, fmt); 581 while (*fmt) { 582 char c = *(fmt++); 583 switch (c) { 584 case 'd': /* int */ 585 in_objs[params.count].integer.value = va_arg(ap, int); 586 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 587 break; 588 /* add more types as needed */ 589 default: 590 printk(TPACPI_ERR "acpi_evalf() called " 591 "with invalid format character '%c'\n", c); 592 return 0; 593 } 594 } 595 va_end(ap); 596 597 if (res_type != 'v') { 598 result.length = sizeof(out_obj); 599 result.pointer = &out_obj; 600 resultp = &result; 601 } else 602 resultp = NULL; 603 604 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 605 606 switch (res_type) { 607 case 'd': /* int */ 608 success = (status == AE_OK && 609 out_obj.type == ACPI_TYPE_INTEGER); 610 if (success && res) 611 *(int *)res = out_obj.integer.value; 612 break; 613 case 'v': /* void */ 614 success = status == AE_OK; 615 break; 616 /* add more types as needed */ 617 default: 618 printk(TPACPI_ERR "acpi_evalf() called " 619 "with invalid format character '%c'\n", res_type); 620 return 0; 621 } 622 623 if (!success && !quiet) 624 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %s\n", 625 method, fmt0, acpi_format_exception(status)); 626 627 return success; 628} 629 630static int acpi_ec_read(int i, u8 *p) 631{ 632 int v; 633 634 if (ecrd_handle) { 635 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 636 return 0; 637 *p = v; 638 } else { 639 if (ec_read(i, p) < 0) 640 return 0; 641 } 642 643 return 1; 644} 645 646static int acpi_ec_write(int i, u8 v) 647{ 648 if (ecwr_handle) { 649 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 650 return 0; 651 } else { 652 if (ec_write(i, v) < 0) 653 return 0; 654 } 655 656 return 1; 657} 658 659static int issue_thinkpad_cmos_command(int cmos_cmd) 660{ 661 if (!cmos_handle) 662 return -ENXIO; 663 664 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 665 return -EIO; 666 667 return 0; 668} 669 670/************************************************************************* 671 * ACPI device model 672 */ 673 674#define TPACPI_ACPIHANDLE_INIT(object) \ 675 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 676 object##_paths, ARRAY_SIZE(object##_paths)) 677 678static void __init drv_acpi_handle_init(const char *name, 679 acpi_handle *handle, const acpi_handle parent, 680 char **paths, const int num_paths) 681{ 682 int i; 683 acpi_status status; 684 685 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 686 name); 687 688 for (i = 0; i < num_paths; i++) { 689 status = acpi_get_handle(parent, paths[i], handle); 690 if (ACPI_SUCCESS(status)) { 691 dbg_printk(TPACPI_DBG_INIT, 692 "Found ACPI handle %s for %s\n", 693 paths[i], name); 694 return; 695 } 696 } 697 698 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 699 name); 700 *handle = NULL; 701} 702 703static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 704 u32 level, void *context, void **return_value) 705{ 706 *(acpi_handle *)return_value = handle; 707 708 return AE_CTRL_TERMINATE; 709} 710 711static void __init tpacpi_acpi_handle_locate(const char *name, 712 const char *hid, 713 acpi_handle *handle) 714{ 715 acpi_status status; 716 acpi_handle device_found; 717 718 BUG_ON(!name || !hid || !handle); 719 vdbg_printk(TPACPI_DBG_INIT, 720 "trying to locate ACPI handle for %s, using HID %s\n", 721 name, hid); 722 723 memset(&device_found, 0, sizeof(device_found)); 724 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 725 (void *)name, &device_found); 726 727 *handle = NULL; 728 729 if (ACPI_SUCCESS(status)) { 730 *handle = device_found; 731 dbg_printk(TPACPI_DBG_INIT, 732 "Found ACPI handle for %s\n", name); 733 } else { 734 vdbg_printk(TPACPI_DBG_INIT, 735 "Could not locate an ACPI handle for %s: %s\n", 736 name, acpi_format_exception(status)); 737 } 738} 739 740static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 741{ 742 struct ibm_struct *ibm = data; 743 744 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 745 return; 746 747 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 748 return; 749 750 ibm->acpi->notify(ibm, event); 751} 752 753static int __init setup_acpi_notify(struct ibm_struct *ibm) 754{ 755 acpi_status status; 756 int rc; 757 758 BUG_ON(!ibm->acpi); 759 760 if (!*ibm->acpi->handle) 761 return 0; 762 763 vdbg_printk(TPACPI_DBG_INIT, 764 "setting up ACPI notify for %s\n", ibm->name); 765 766 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 767 if (rc < 0) { 768 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n", 769 ibm->name, rc); 770 return -ENODEV; 771 } 772 773 ibm->acpi->device->driver_data = ibm; 774 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 775 TPACPI_ACPI_EVENT_PREFIX, 776 ibm->name); 777 778 status = acpi_install_notify_handler(*ibm->acpi->handle, 779 ibm->acpi->type, dispatch_acpi_notify, ibm); 780 if (ACPI_FAILURE(status)) { 781 if (status == AE_ALREADY_EXISTS) { 782 printk(TPACPI_NOTICE 783 "another device driver is already " 784 "handling %s events\n", ibm->name); 785 } else { 786 printk(TPACPI_ERR 787 "acpi_install_notify_handler(%s) failed: %s\n", 788 ibm->name, acpi_format_exception(status)); 789 } 790 return -ENODEV; 791 } 792 ibm->flags.acpi_notify_installed = 1; 793 return 0; 794} 795 796static int __init tpacpi_device_add(struct acpi_device *device) 797{ 798 return 0; 799} 800 801static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 802{ 803 int rc; 804 805 dbg_printk(TPACPI_DBG_INIT, 806 "registering %s as an ACPI driver\n", ibm->name); 807 808 BUG_ON(!ibm->acpi); 809 810 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 811 if (!ibm->acpi->driver) { 812 printk(TPACPI_ERR 813 "failed to allocate memory for ibm->acpi->driver\n"); 814 return -ENOMEM; 815 } 816 817 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 818 ibm->acpi->driver->ids = ibm->acpi->hid; 819 820 ibm->acpi->driver->ops.add = &tpacpi_device_add; 821 822 rc = acpi_bus_register_driver(ibm->acpi->driver); 823 if (rc < 0) { 824 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n", 825 ibm->name, rc); 826 kfree(ibm->acpi->driver); 827 ibm->acpi->driver = NULL; 828 } else if (!rc) 829 ibm->flags.acpi_driver_registered = 1; 830 831 return rc; 832} 833 834 835/**************************************************************************** 836 **************************************************************************** 837 * 838 * Procfs Helpers 839 * 840 **************************************************************************** 841 ****************************************************************************/ 842 843static int dispatch_proc_show(struct seq_file *m, void *v) 844{ 845 struct ibm_struct *ibm = m->private; 846 847 if (!ibm || !ibm->read) 848 return -EINVAL; 849 return ibm->read(m); 850} 851 852static int dispatch_proc_open(struct inode *inode, struct file *file) 853{ 854 return single_open(file, dispatch_proc_show, PDE(inode)->data); 855} 856 857static ssize_t dispatch_proc_write(struct file *file, 858 const char __user *userbuf, 859 size_t count, loff_t *pos) 860{ 861 struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data; 862 char *kernbuf; 863 int ret; 864 865 if (!ibm || !ibm->write) 866 return -EINVAL; 867 if (count > PAGE_SIZE - 2) 868 return -EINVAL; 869 870 kernbuf = kmalloc(count + 2, GFP_KERNEL); 871 if (!kernbuf) 872 return -ENOMEM; 873 874 if (copy_from_user(kernbuf, userbuf, count)) { 875 kfree(kernbuf); 876 return -EFAULT; 877 } 878 879 kernbuf[count] = 0; 880 strcat(kernbuf, ","); 881 ret = ibm->write(kernbuf); 882 if (ret == 0) 883 ret = count; 884 885 kfree(kernbuf); 886 887 return ret; 888} 889 890static const struct file_operations dispatch_proc_fops = { 891 .owner = THIS_MODULE, 892 .open = dispatch_proc_open, 893 .read = seq_read, 894 .llseek = seq_lseek, 895 .release = single_release, 896 .write = dispatch_proc_write, 897}; 898 899static char *next_cmd(char **cmds) 900{ 901 char *start = *cmds; 902 char *end; 903 904 while ((end = strchr(start, ',')) && end == start) 905 start = end + 1; 906 907 if (!end) 908 return NULL; 909 910 *end = 0; 911 *cmds = end + 1; 912 return start; 913} 914 915 916/**************************************************************************** 917 **************************************************************************** 918 * 919 * Device model: input, hwmon and platform 920 * 921 **************************************************************************** 922 ****************************************************************************/ 923 924static struct platform_device *tpacpi_pdev; 925static struct platform_device *tpacpi_sensors_pdev; 926static struct device *tpacpi_hwmon; 927static struct input_dev *tpacpi_inputdev; 928static struct mutex tpacpi_inputdev_send_mutex; 929static LIST_HEAD(tpacpi_all_drivers); 930 931static int tpacpi_suspend_handler(struct platform_device *pdev, 932 pm_message_t state) 933{ 934 struct ibm_struct *ibm, *itmp; 935 936 list_for_each_entry_safe(ibm, itmp, 937 &tpacpi_all_drivers, 938 all_drivers) { 939 if (ibm->suspend) 940 (ibm->suspend)(state); 941 } 942 943 return 0; 944} 945 946static int tpacpi_resume_handler(struct platform_device *pdev) 947{ 948 struct ibm_struct *ibm, *itmp; 949 950 list_for_each_entry_safe(ibm, itmp, 951 &tpacpi_all_drivers, 952 all_drivers) { 953 if (ibm->resume) 954 (ibm->resume)(); 955 } 956 957 return 0; 958} 959 960static void tpacpi_shutdown_handler(struct platform_device *pdev) 961{ 962 struct ibm_struct *ibm, *itmp; 963 964 list_for_each_entry_safe(ibm, itmp, 965 &tpacpi_all_drivers, 966 all_drivers) { 967 if (ibm->shutdown) 968 (ibm->shutdown)(); 969 } 970} 971 972static struct platform_driver tpacpi_pdriver = { 973 .driver = { 974 .name = TPACPI_DRVR_NAME, 975 .owner = THIS_MODULE, 976 }, 977 .suspend = tpacpi_suspend_handler, 978 .resume = tpacpi_resume_handler, 979 .shutdown = tpacpi_shutdown_handler, 980}; 981 982static struct platform_driver tpacpi_hwmon_pdriver = { 983 .driver = { 984 .name = TPACPI_HWMON_DRVR_NAME, 985 .owner = THIS_MODULE, 986 }, 987}; 988 989/************************************************************************* 990 * sysfs support helpers 991 */ 992 993struct attribute_set { 994 unsigned int members, max_members; 995 struct attribute_group group; 996}; 997 998struct attribute_set_obj { 999 struct attribute_set s; 1000 struct attribute *a; 1001} __attribute__((packed)); 1002 1003static struct attribute_set *create_attr_set(unsigned int max_members, 1004 const char *name) 1005{ 1006 struct attribute_set_obj *sobj; 1007 1008 if (max_members == 0) 1009 return NULL; 1010 1011 /* Allocates space for implicit NULL at the end too */ 1012 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1013 max_members * sizeof(struct attribute *), 1014 GFP_KERNEL); 1015 if (!sobj) 1016 return NULL; 1017 sobj->s.max_members = max_members; 1018 sobj->s.group.attrs = &sobj->a; 1019 sobj->s.group.name = name; 1020 1021 return &sobj->s; 1022} 1023 1024#define destroy_attr_set(_set) \ 1025 kfree(_set); 1026 1027/* not multi-threaded safe, use it in a single thread per set */ 1028static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1029{ 1030 if (!s || !attr) 1031 return -EINVAL; 1032 1033 if (s->members >= s->max_members) 1034 return -ENOMEM; 1035 1036 s->group.attrs[s->members] = attr; 1037 s->members++; 1038 1039 return 0; 1040} 1041 1042static int add_many_to_attr_set(struct attribute_set *s, 1043 struct attribute **attr, 1044 unsigned int count) 1045{ 1046 int i, res; 1047 1048 for (i = 0; i < count; i++) { 1049 res = add_to_attr_set(s, attr[i]); 1050 if (res) 1051 return res; 1052 } 1053 1054 return 0; 1055} 1056 1057static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1058{ 1059 sysfs_remove_group(kobj, &s->group); 1060 destroy_attr_set(s); 1061} 1062 1063#define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1064 sysfs_create_group(_kobj, &_attr_set->group) 1065 1066static int parse_strtoul(const char *buf, 1067 unsigned long max, unsigned long *value) 1068{ 1069 char *endp; 1070 1071 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1072 endp = skip_spaces(endp); 1073 if (*endp || *value > max) 1074 return -EINVAL; 1075 1076 return 0; 1077} 1078 1079static void tpacpi_disable_brightness_delay(void) 1080{ 1081 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1082 printk(TPACPI_NOTICE 1083 "ACPI backlight control delay disabled\n"); 1084} 1085 1086static void printk_deprecated_attribute(const char * const what, 1087 const char * const details) 1088{ 1089 tpacpi_log_usertask("deprecated sysfs attribute"); 1090 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and " 1091 "will be removed. %s\n", 1092 what, details); 1093} 1094 1095/************************************************************************* 1096 * rfkill and radio control support helpers 1097 */ 1098 1099/* 1100 * ThinkPad-ACPI firmware handling model: 1101 * 1102 * WLSW (master wireless switch) is event-driven, and is common to all 1103 * firmware-controlled radios. It cannot be controlled, just monitored, 1104 * as expected. It overrides all radio state in firmware 1105 * 1106 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1107 * (TODO: verify how WLSW interacts with the returned radio state). 1108 * 1109 * The only time there are shadow radio state changes, is when 1110 * masked-off hotkeys are used. 1111 */ 1112 1113/* 1114 * Internal driver API for radio state: 1115 * 1116 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1117 * bool: true means radio blocked (off) 1118 */ 1119enum tpacpi_rfkill_state { 1120 TPACPI_RFK_RADIO_OFF = 0, 1121 TPACPI_RFK_RADIO_ON 1122}; 1123 1124/* rfkill switches */ 1125enum tpacpi_rfk_id { 1126 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1127 TPACPI_RFK_WWAN_SW_ID, 1128 TPACPI_RFK_UWB_SW_ID, 1129 TPACPI_RFK_SW_MAX 1130}; 1131 1132static const char *tpacpi_rfkill_names[] = { 1133 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1134 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1135 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1136 [TPACPI_RFK_SW_MAX] = NULL 1137}; 1138 1139/* ThinkPad-ACPI rfkill subdriver */ 1140struct tpacpi_rfk { 1141 struct rfkill *rfkill; 1142 enum tpacpi_rfk_id id; 1143 const struct tpacpi_rfk_ops *ops; 1144}; 1145 1146struct tpacpi_rfk_ops { 1147 /* firmware interface */ 1148 int (*get_status)(void); 1149 int (*set_status)(const enum tpacpi_rfkill_state); 1150}; 1151 1152static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1153 1154/* Query FW and update rfkill sw state for a given rfkill switch */ 1155static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1156{ 1157 int status; 1158 1159 if (!tp_rfk) 1160 return -ENODEV; 1161 1162 status = (tp_rfk->ops->get_status)(); 1163 if (status < 0) 1164 return status; 1165 1166 rfkill_set_sw_state(tp_rfk->rfkill, 1167 (status == TPACPI_RFK_RADIO_OFF)); 1168 1169 return status; 1170} 1171 1172/* Query FW and update rfkill sw state for all rfkill switches */ 1173static void tpacpi_rfk_update_swstate_all(void) 1174{ 1175 unsigned int i; 1176 1177 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1178 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1179} 1180 1181/* 1182 * Sync the HW-blocking state of all rfkill switches, 1183 * do notice it causes the rfkill core to schedule uevents 1184 */ 1185static void tpacpi_rfk_update_hwblock_state(bool blocked) 1186{ 1187 unsigned int i; 1188 struct tpacpi_rfk *tp_rfk; 1189 1190 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1191 tp_rfk = tpacpi_rfkill_switches[i]; 1192 if (tp_rfk) { 1193 if (rfkill_set_hw_state(tp_rfk->rfkill, 1194 blocked)) { 1195 /* ignore -- we track sw block */ 1196 } 1197 } 1198 } 1199} 1200 1201/* Call to get the WLSW state from the firmware */ 1202static int hotkey_get_wlsw(void); 1203 1204/* Call to query WLSW state and update all rfkill switches */ 1205static bool tpacpi_rfk_check_hwblock_state(void) 1206{ 1207 int res = hotkey_get_wlsw(); 1208 int hw_blocked; 1209 1210 /* When unknown or unsupported, we have to assume it is unblocked */ 1211 if (res < 0) 1212 return false; 1213 1214 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1215 tpacpi_rfk_update_hwblock_state(hw_blocked); 1216 1217 return hw_blocked; 1218} 1219 1220static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1221{ 1222 struct tpacpi_rfk *tp_rfk = data; 1223 int res; 1224 1225 dbg_printk(TPACPI_DBG_RFKILL, 1226 "request to change radio state to %s\n", 1227 blocked ? "blocked" : "unblocked"); 1228 1229 /* try to set radio state */ 1230 res = (tp_rfk->ops->set_status)(blocked ? 1231 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1232 1233 /* and update the rfkill core with whatever the FW really did */ 1234 tpacpi_rfk_update_swstate(tp_rfk); 1235 1236 return (res < 0) ? res : 0; 1237} 1238 1239static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1240 .set_block = tpacpi_rfk_hook_set_block, 1241}; 1242 1243static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1244 const struct tpacpi_rfk_ops *tp_rfkops, 1245 const enum rfkill_type rfktype, 1246 const char *name, 1247 const bool set_default) 1248{ 1249 struct tpacpi_rfk *atp_rfk; 1250 int res; 1251 bool sw_state = false; 1252 bool hw_state; 1253 int sw_status; 1254 1255 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1256 1257 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1258 if (atp_rfk) 1259 atp_rfk->rfkill = rfkill_alloc(name, 1260 &tpacpi_pdev->dev, 1261 rfktype, 1262 &tpacpi_rfk_rfkill_ops, 1263 atp_rfk); 1264 if (!atp_rfk || !atp_rfk->rfkill) { 1265 printk(TPACPI_ERR 1266 "failed to allocate memory for rfkill class\n"); 1267 kfree(atp_rfk); 1268 return -ENOMEM; 1269 } 1270 1271 atp_rfk->id = id; 1272 atp_rfk->ops = tp_rfkops; 1273 1274 sw_status = (tp_rfkops->get_status)(); 1275 if (sw_status < 0) { 1276 printk(TPACPI_ERR 1277 "failed to read initial state for %s, error %d\n", 1278 name, sw_status); 1279 } else { 1280 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1281 if (set_default) { 1282 /* try to keep the initial state, since we ask the 1283 * firmware to preserve it across S5 in NVRAM */ 1284 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1285 } 1286 } 1287 hw_state = tpacpi_rfk_check_hwblock_state(); 1288 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1289 1290 res = rfkill_register(atp_rfk->rfkill); 1291 if (res < 0) { 1292 printk(TPACPI_ERR 1293 "failed to register %s rfkill switch: %d\n", 1294 name, res); 1295 rfkill_destroy(atp_rfk->rfkill); 1296 kfree(atp_rfk); 1297 return res; 1298 } 1299 1300 tpacpi_rfkill_switches[id] = atp_rfk; 1301 1302 printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n", 1303 name, (sw_state || hw_state) ? "" : "un"); 1304 return 0; 1305} 1306 1307static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1308{ 1309 struct tpacpi_rfk *tp_rfk; 1310 1311 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1312 1313 tp_rfk = tpacpi_rfkill_switches[id]; 1314 if (tp_rfk) { 1315 rfkill_unregister(tp_rfk->rfkill); 1316 rfkill_destroy(tp_rfk->rfkill); 1317 tpacpi_rfkill_switches[id] = NULL; 1318 kfree(tp_rfk); 1319 } 1320} 1321 1322static void printk_deprecated_rfkill_attribute(const char * const what) 1323{ 1324 printk_deprecated_attribute(what, 1325 "Please switch to generic rfkill before year 2010"); 1326} 1327 1328/* sysfs <radio> enable ------------------------------------------------ */ 1329static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1330 struct device_attribute *attr, 1331 char *buf) 1332{ 1333 int status; 1334 1335 printk_deprecated_rfkill_attribute(attr->attr.name); 1336 1337 /* This is in the ABI... */ 1338 if (tpacpi_rfk_check_hwblock_state()) { 1339 status = TPACPI_RFK_RADIO_OFF; 1340 } else { 1341 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1342 if (status < 0) 1343 return status; 1344 } 1345 1346 return snprintf(buf, PAGE_SIZE, "%d\n", 1347 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1348} 1349 1350static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1351 struct device_attribute *attr, 1352 const char *buf, size_t count) 1353{ 1354 unsigned long t; 1355 int res; 1356 1357 printk_deprecated_rfkill_attribute(attr->attr.name); 1358 1359 if (parse_strtoul(buf, 1, &t)) 1360 return -EINVAL; 1361 1362 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1363 1364 /* This is in the ABI... */ 1365 if (tpacpi_rfk_check_hwblock_state() && !!t) 1366 return -EPERM; 1367 1368 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1369 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1370 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1371 1372 return (res < 0) ? res : count; 1373} 1374 1375/* procfs -------------------------------------------------------------- */ 1376static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1377{ 1378 if (id >= TPACPI_RFK_SW_MAX) 1379 seq_printf(m, "status:\t\tnot supported\n"); 1380 else { 1381 int status; 1382 1383 /* This is in the ABI... */ 1384 if (tpacpi_rfk_check_hwblock_state()) { 1385 status = TPACPI_RFK_RADIO_OFF; 1386 } else { 1387 status = tpacpi_rfk_update_swstate( 1388 tpacpi_rfkill_switches[id]); 1389 if (status < 0) 1390 return status; 1391 } 1392 1393 seq_printf(m, "status:\t\t%s\n", 1394 (status == TPACPI_RFK_RADIO_ON) ? 1395 "enabled" : "disabled"); 1396 seq_printf(m, "commands:\tenable, disable\n"); 1397 } 1398 1399 return 0; 1400} 1401 1402static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1403{ 1404 char *cmd; 1405 int status = -1; 1406 int res = 0; 1407 1408 if (id >= TPACPI_RFK_SW_MAX) 1409 return -ENODEV; 1410 1411 while ((cmd = next_cmd(&buf))) { 1412 if (strlencmp(cmd, "enable") == 0) 1413 status = TPACPI_RFK_RADIO_ON; 1414 else if (strlencmp(cmd, "disable") == 0) 1415 status = TPACPI_RFK_RADIO_OFF; 1416 else 1417 return -EINVAL; 1418 } 1419 1420 if (status != -1) { 1421 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1422 (status == TPACPI_RFK_RADIO_ON) ? 1423 "enable" : "disable", 1424 tpacpi_rfkill_names[id]); 1425 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1426 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1427 } 1428 1429 return res; 1430} 1431 1432/************************************************************************* 1433 * thinkpad-acpi driver attributes 1434 */ 1435 1436/* interface_version --------------------------------------------------- */ 1437static ssize_t tpacpi_driver_interface_version_show( 1438 struct device_driver *drv, 1439 char *buf) 1440{ 1441 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1442} 1443 1444static DRIVER_ATTR(interface_version, S_IRUGO, 1445 tpacpi_driver_interface_version_show, NULL); 1446 1447/* debug_level --------------------------------------------------------- */ 1448static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1449 char *buf) 1450{ 1451 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1452} 1453 1454static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1455 const char *buf, size_t count) 1456{ 1457 unsigned long t; 1458 1459 if (parse_strtoul(buf, 0xffff, &t)) 1460 return -EINVAL; 1461 1462 dbg_level = t; 1463 1464 return count; 1465} 1466 1467static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1468 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1469 1470/* version ------------------------------------------------------------- */ 1471static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1472 char *buf) 1473{ 1474 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1475 TPACPI_DESC, TPACPI_VERSION); 1476} 1477 1478static DRIVER_ATTR(version, S_IRUGO, 1479 tpacpi_driver_version_show, NULL); 1480 1481/* --------------------------------------------------------------------- */ 1482 1483#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1484 1485/* wlsw_emulstate ------------------------------------------------------ */ 1486static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1487 char *buf) 1488{ 1489 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1490} 1491 1492static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1493 const char *buf, size_t count) 1494{ 1495 unsigned long t; 1496 1497 if (parse_strtoul(buf, 1, &t)) 1498 return -EINVAL; 1499 1500 if (tpacpi_wlsw_emulstate != !!t) { 1501 tpacpi_wlsw_emulstate = !!t; 1502 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1503 } 1504 1505 return count; 1506} 1507 1508static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1509 tpacpi_driver_wlsw_emulstate_show, 1510 tpacpi_driver_wlsw_emulstate_store); 1511 1512/* bluetooth_emulstate ------------------------------------------------- */ 1513static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1514 struct device_driver *drv, 1515 char *buf) 1516{ 1517 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1518} 1519 1520static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1521 struct device_driver *drv, 1522 const char *buf, size_t count) 1523{ 1524 unsigned long t; 1525 1526 if (parse_strtoul(buf, 1, &t)) 1527 return -EINVAL; 1528 1529 tpacpi_bluetooth_emulstate = !!t; 1530 1531 return count; 1532} 1533 1534static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1535 tpacpi_driver_bluetooth_emulstate_show, 1536 tpacpi_driver_bluetooth_emulstate_store); 1537 1538/* wwan_emulstate ------------------------------------------------- */ 1539static ssize_t tpacpi_driver_wwan_emulstate_show( 1540 struct device_driver *drv, 1541 char *buf) 1542{ 1543 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1544} 1545 1546static ssize_t tpacpi_driver_wwan_emulstate_store( 1547 struct device_driver *drv, 1548 const char *buf, size_t count) 1549{ 1550 unsigned long t; 1551 1552 if (parse_strtoul(buf, 1, &t)) 1553 return -EINVAL; 1554 1555 tpacpi_wwan_emulstate = !!t; 1556 1557 return count; 1558} 1559 1560static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1561 tpacpi_driver_wwan_emulstate_show, 1562 tpacpi_driver_wwan_emulstate_store); 1563 1564/* uwb_emulstate ------------------------------------------------- */ 1565static ssize_t tpacpi_driver_uwb_emulstate_show( 1566 struct device_driver *drv, 1567 char *buf) 1568{ 1569 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1570} 1571 1572static ssize_t tpacpi_driver_uwb_emulstate_store( 1573 struct device_driver *drv, 1574 const char *buf, size_t count) 1575{ 1576 unsigned long t; 1577 1578 if (parse_strtoul(buf, 1, &t)) 1579 return -EINVAL; 1580 1581 tpacpi_uwb_emulstate = !!t; 1582 1583 return count; 1584} 1585 1586static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1587 tpacpi_driver_uwb_emulstate_show, 1588 tpacpi_driver_uwb_emulstate_store); 1589#endif 1590 1591/* --------------------------------------------------------------------- */ 1592 1593static struct driver_attribute *tpacpi_driver_attributes[] = { 1594 &driver_attr_debug_level, &driver_attr_version, 1595 &driver_attr_interface_version, 1596}; 1597 1598static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1599{ 1600 int i, res; 1601 1602 i = 0; 1603 res = 0; 1604 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1605 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1606 i++; 1607 } 1608 1609#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1610 if (!res && dbg_wlswemul) 1611 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1612 if (!res && dbg_bluetoothemul) 1613 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1614 if (!res && dbg_wwanemul) 1615 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1616 if (!res && dbg_uwbemul) 1617 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1618#endif 1619 1620 return res; 1621} 1622 1623static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1624{ 1625 int i; 1626 1627 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1628 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1629 1630#ifdef THINKPAD_ACPI_DEBUGFACILITIES 1631 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1632 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1633 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1634 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1635#endif 1636} 1637 1638/************************************************************************* 1639 * Firmware Data 1640 */ 1641 1642/* 1643 * Table of recommended minimum BIOS versions 1644 * 1645 * Reasons for listing: 1646 * 1. Stable BIOS, listed because the unknown amount of 1647 * bugs and bad ACPI behaviour on older versions 1648 * 1649 * 2. BIOS or EC fw with known bugs that trigger on Linux 1650 * 1651 * 3. BIOS with known reduced functionality in older versions 1652 * 1653 * We recommend the latest BIOS and EC version. 1654 * We only support the latest BIOS and EC fw version as a rule. 1655 * 1656 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1657 * Information from users in ThinkWiki 1658 * 1659 * WARNING: we use this table also to detect that the machine is 1660 * a ThinkPad in some cases, so don't remove entries lightly. 1661 */ 1662 1663#define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1664 { .vendor = (__v), \ 1665 .bios = TPID(__id1, __id2), \ 1666 .ec = TPACPI_MATCH_ANY, \ 1667 .quirks = TPACPI_MATCH_ANY << 16 \ 1668 | (__bv1) << 8 | (__bv2) } 1669 1670#define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1671 __eid, __ev1, __ev2) \ 1672 { .vendor = (__v), \ 1673 .bios = TPID(__bid1, __bid2), \ 1674 .ec = __eid, \ 1675 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1676 | (__bv1) << 8 | (__bv2) } 1677 1678#define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1679 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1680 1681/* Outdated IBM BIOSes often lack the EC id string */ 1682#define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1683 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1684 __bv1, __bv2, TPID(__id1, __id2), \ 1685 __ev1, __ev2), \ 1686 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1687 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1688 __ev1, __ev2) 1689 1690/* Outdated IBM BIOSes often lack the EC id string */ 1691#define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1692 __eid1, __eid2, __ev1, __ev2) \ 1693 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1694 __bv1, __bv2, TPID(__eid1, __eid2), \ 1695 __ev1, __ev2), \ 1696 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1697 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1698 __ev1, __ev2) 1699 1700#define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1701 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1702 1703#define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1704 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1705 __bv1, __bv2, TPID(__id1, __id2), \ 1706 __ev1, __ev2) 1707 1708#define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1709 __eid1, __eid2, __ev1, __ev2) \ 1710 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1711 __bv1, __bv2, TPID(__eid1, __eid2), \ 1712 __ev1, __ev2) 1713 1714static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1715 /* Numeric models ------------------ */ 1716 /* FW MODEL BIOS VERS */ 1717 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1718 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1719 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1720 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1721 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1722 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1723 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1724 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1725 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1726 1727 /* A-series ------------------------- */ 1728 /* FW MODEL BIOS VERS EC VERS */ 1729 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1730 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1731 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1732 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1733 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1734 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1735 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1736 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1737 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1738 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1739 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1740 1741 /* G-series ------------------------- */ 1742 /* FW MODEL BIOS VERS */ 1743 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1744 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1745 1746 /* R-series, T-series --------------- */ 1747 /* FW MODEL BIOS VERS EC VERS */ 1748 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1749 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1750 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1751 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1752 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1753 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1754 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1755 T40/p, T41/p, T42/p (1) */ 1756 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1757 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1758 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1759 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1760 1761 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1762 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1763 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1764 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1765 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1766 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1767 1768 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1769 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1770 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1771 1772 /* BIOS FW BIOS VERS EC FW EC VERS */ 1773 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1774 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1775 1776 /* X-series ------------------------- */ 1777 /* FW MODEL BIOS VERS EC VERS */ 1778 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1779 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1780 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1781 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1782 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1783 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1784 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1785 1786 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1787 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1788 1789 /* (0) - older versions lack DMI EC fw string and functionality */ 1790 /* (1) - older versions known to lack functionality */ 1791}; 1792 1793#undef TPV_QL1 1794#undef TPV_QL0 1795#undef TPV_QI2 1796#undef TPV_QI1 1797#undef TPV_QI0 1798#undef TPV_Q_X 1799#undef TPV_Q 1800 1801static void __init tpacpi_check_outdated_fw(void) 1802{ 1803 unsigned long fwvers; 1804 u16 ec_version, bios_version; 1805 1806 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1807 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1808 1809 if (!fwvers) 1810 return; 1811 1812 bios_version = fwvers & 0xffffU; 1813 ec_version = (fwvers >> 16) & 0xffffU; 1814 1815 /* note that unknown versions are set to 0x0000 and we use that */ 1816 if ((bios_version > thinkpad_id.bios_release) || 1817 (ec_version > thinkpad_id.ec_release && 1818 ec_version != TPACPI_MATCH_ANY)) { 1819 /* 1820 * The changelogs would let us track down the exact 1821 * reason, but it is just too much of a pain to track 1822 * it. We only list BIOSes that are either really 1823 * broken, or really stable to begin with, so it is 1824 * best if the user upgrades the firmware anyway. 1825 */ 1826 printk(TPACPI_WARN 1827 "WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1828 printk(TPACPI_WARN 1829 "WARNING: This firmware may be missing critical bug " 1830 "fixes and/or important features\n"); 1831 } 1832} 1833 1834static bool __init tpacpi_is_fw_known(void) 1835{ 1836 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1837 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1838} 1839 1840/**************************************************************************** 1841 **************************************************************************** 1842 * 1843 * Subdrivers 1844 * 1845 **************************************************************************** 1846 ****************************************************************************/ 1847 1848/************************************************************************* 1849 * thinkpad-acpi metadata subdriver 1850 */ 1851 1852static int thinkpad_acpi_driver_read(struct seq_file *m) 1853{ 1854 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1855 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1856 return 0; 1857} 1858 1859static struct ibm_struct thinkpad_acpi_driver_data = { 1860 .name = "driver", 1861 .read = thinkpad_acpi_driver_read, 1862}; 1863 1864/************************************************************************* 1865 * Hotkey subdriver 1866 */ 1867 1868/* 1869 * ThinkPad firmware event model 1870 * 1871 * The ThinkPad firmware has two main event interfaces: normal ACPI 1872 * notifications (which follow the ACPI standard), and a private event 1873 * interface. 1874 * 1875 * The private event interface also issues events for the hotkeys. As 1876 * the driver gained features, the event handling code ended up being 1877 * built around the hotkey subdriver. This will need to be refactored 1878 * to a more formal event API eventually. 1879 * 1880 * Some "hotkeys" are actually supposed to be used as event reports, 1881 * such as "brightness has changed", "volume has changed", depending on 1882 * the ThinkPad model and how the firmware is operating. 1883 * 1884 * Unlike other classes, hotkey-class events have mask/unmask control on 1885 * non-ancient firmware. However, how it behaves changes a lot with the 1886 * firmware model and version. 1887 */ 1888 1889enum { /* hot key scan codes (derived from ACPI DSDT) */ 1890 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1891 TP_ACPI_HOTKEYSCAN_FNF2, 1892 TP_ACPI_HOTKEYSCAN_FNF3, 1893 TP_ACPI_HOTKEYSCAN_FNF4, 1894 TP_ACPI_HOTKEYSCAN_FNF5, 1895 TP_ACPI_HOTKEYSCAN_FNF6, 1896 TP_ACPI_HOTKEYSCAN_FNF7, 1897 TP_ACPI_HOTKEYSCAN_FNF8, 1898 TP_ACPI_HOTKEYSCAN_FNF9, 1899 TP_ACPI_HOTKEYSCAN_FNF10, 1900 TP_ACPI_HOTKEYSCAN_FNF11, 1901 TP_ACPI_HOTKEYSCAN_FNF12, 1902 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1903 TP_ACPI_HOTKEYSCAN_FNINSERT, 1904 TP_ACPI_HOTKEYSCAN_FNDELETE, 1905 TP_ACPI_HOTKEYSCAN_FNHOME, 1906 TP_ACPI_HOTKEYSCAN_FNEND, 1907 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1908 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1909 TP_ACPI_HOTKEYSCAN_FNSPACE, 1910 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1911 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1912 TP_ACPI_HOTKEYSCAN_MUTE, 1913 TP_ACPI_HOTKEYSCAN_THINKPAD, 1914 TP_ACPI_HOTKEYSCAN_UNK1, 1915 TP_ACPI_HOTKEYSCAN_UNK2, 1916 TP_ACPI_HOTKEYSCAN_UNK3, 1917 TP_ACPI_HOTKEYSCAN_UNK4, 1918 TP_ACPI_HOTKEYSCAN_UNK5, 1919 TP_ACPI_HOTKEYSCAN_UNK6, 1920 TP_ACPI_HOTKEYSCAN_UNK7, 1921 TP_ACPI_HOTKEYSCAN_UNK8, 1922 1923 /* Hotkey keymap size */ 1924 TPACPI_HOTKEY_MAP_LEN 1925}; 1926 1927enum { /* Keys/events available through NVRAM polling */ 1928 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1929 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1930}; 1931 1932enum { /* Positions of some of the keys in hotkey masks */ 1933 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1934 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1935 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1936 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1937 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1938 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1939 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1940 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1941 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1942 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1943 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1944}; 1945 1946enum { /* NVRAM to ACPI HKEY group map */ 1947 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1948 TP_ACPI_HKEY_ZOOM_MASK | 1949 TP_ACPI_HKEY_DISPSWTCH_MASK | 1950 TP_ACPI_HKEY_HIBERNATE_MASK, 1951 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1952 TP_ACPI_HKEY_BRGHTDWN_MASK, 1953 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1954 TP_ACPI_HKEY_VOLDWN_MASK | 1955 TP_ACPI_HKEY_MUTE_MASK, 1956}; 1957 1958#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1959struct tp_nvram_state { 1960 u16 thinkpad_toggle:1; 1961 u16 zoom_toggle:1; 1962 u16 display_toggle:1; 1963 u16 thinklight_toggle:1; 1964 u16 hibernate_toggle:1; 1965 u16 displayexp_toggle:1; 1966 u16 display_state:1; 1967 u16 brightness_toggle:1; 1968 u16 volume_toggle:1; 1969 u16 mute:1; 1970 1971 u8 brightness_level; 1972 u8 volume_level; 1973}; 1974 1975/* kthread for the hotkey poller */ 1976static struct task_struct *tpacpi_hotkey_task; 1977 1978/* Acquired while the poller kthread is running, use to sync start/stop */ 1979static struct mutex hotkey_thread_mutex; 1980 1981/* 1982 * Acquire mutex to write poller control variables as an 1983 * atomic block. 1984 * 1985 * Increment hotkey_config_change when changing them if you 1986 * want the kthread to forget old state. 1987 * 1988 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1989 */ 1990static struct mutex hotkey_thread_data_mutex; 1991static unsigned int hotkey_config_change; 1992 1993/* 1994 * hotkey poller control variables 1995 * 1996 * Must be atomic or readers will also need to acquire mutex 1997 * 1998 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1999 * should be used only when the changes need to be taken as 2000 * a block, OR when one needs to force the kthread to forget 2001 * old state. 2002 */ 2003static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2004static unsigned int hotkey_poll_freq = 10; /* Hz */ 2005 2006#define HOTKEY_CONFIG_CRITICAL_START \ 2007 do { \ 2008 mutex_lock(&hotkey_thread_data_mutex); \ 2009 hotkey_config_change++; \ 2010 } while (0); 2011#define HOTKEY_CONFIG_CRITICAL_END \ 2012 mutex_unlock(&hotkey_thread_data_mutex); 2013 2014#else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2015 2016#define hotkey_source_mask 0U 2017#define HOTKEY_CONFIG_CRITICAL_START 2018#define HOTKEY_CONFIG_CRITICAL_END 2019 2020#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2021 2022static struct mutex hotkey_mutex; 2023 2024static enum { /* Reasons for waking up */ 2025 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2026 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2027 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2028} hotkey_wakeup_reason; 2029 2030static int hotkey_autosleep_ack; 2031 2032static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2033static u32 hotkey_all_mask; /* all events supported in fw */ 2034static u32 hotkey_reserved_mask; /* events better left disabled */ 2035static u32 hotkey_driver_mask; /* events needed by the driver */ 2036static u32 hotkey_user_mask; /* events visible to userspace */ 2037static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2038 2039static unsigned int hotkey_report_mode; 2040 2041static u16 *hotkey_keycode_map; 2042 2043static struct attribute_set *hotkey_dev_attributes; 2044 2045static void tpacpi_driver_event(const unsigned int hkey_event); 2046static void hotkey_driver_event(const unsigned int scancode); 2047static void hotkey_poll_setup(const bool may_warn); 2048 2049/* HKEY.MHKG() return bits */ 2050#define TP_HOTKEY_TABLET_MASK (1 << 3) 2051 2052static int hotkey_get_wlsw(void) 2053{ 2054 int status; 2055 2056 if (!tp_features.hotkey_wlsw) 2057 return -ENODEV; 2058 2059#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2060 if (dbg_wlswemul) 2061 return (tpacpi_wlsw_emulstate) ? 2062 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2063#endif 2064 2065 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2066 return -EIO; 2067 2068 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2069} 2070 2071static int hotkey_get_tablet_mode(int *status) 2072{ 2073 int s; 2074 2075 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2076 return -EIO; 2077 2078 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2079 return 0; 2080} 2081 2082/* 2083 * Reads current event mask from firmware, and updates 2084 * hotkey_acpi_mask accordingly. Also resets any bits 2085 * from hotkey_user_mask that are unavailable to be 2086 * delivered (shadow requirement of the userspace ABI). 2087 * 2088 * Call with hotkey_mutex held 2089 */ 2090static int hotkey_mask_get(void) 2091{ 2092 if (tp_features.hotkey_mask) { 2093 u32 m = 0; 2094 2095 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2096 return -EIO; 2097 2098 hotkey_acpi_mask = m; 2099 } else { 2100 /* no mask support doesn't mean no event support... */ 2101 hotkey_acpi_mask = hotkey_all_mask; 2102 } 2103 2104 /* sync userspace-visible mask */ 2105 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2106 2107 return 0; 2108} 2109 2110void static hotkey_mask_warn_incomplete_mask(void) 2111{ 2112 /* log only what the user can fix... */ 2113 const u32 wantedmask = hotkey_driver_mask & 2114 ~(hotkey_acpi_mask | hotkey_source_mask) & 2115 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2116 2117 if (wantedmask) 2118 printk(TPACPI_NOTICE 2119 "required events 0x%08x not enabled!\n", 2120 wantedmask); 2121} 2122 2123/* 2124 * Set the firmware mask when supported 2125 * 2126 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2127 * 2128 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2129 * 2130 * Call with hotkey_mutex held 2131 */ 2132static int hotkey_mask_set(u32 mask) 2133{ 2134 int i; 2135 int rc = 0; 2136 2137 const u32 fwmask = mask & ~hotkey_source_mask; 2138 2139 if (tp_features.hotkey_mask) { 2140 for (i = 0; i < 32; i++) { 2141 if (!acpi_evalf(hkey_handle, 2142 NULL, "MHKM", "vdd", i + 1, 2143 !!(mask & (1 << i)))) { 2144 rc = -EIO; 2145 break; 2146 } 2147 } 2148 } 2149 2150 /* 2151 * We *must* make an inconditional call to hotkey_mask_get to 2152 * refresh hotkey_acpi_mask and update hotkey_user_mask 2153 * 2154 * Take the opportunity to also log when we cannot _enable_ 2155 * a given event. 2156 */ 2157 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2158 printk(TPACPI_NOTICE 2159 "asked for hotkey mask 0x%08x, but " 2160 "firmware forced it to 0x%08x\n", 2161 fwmask, hotkey_acpi_mask); 2162 } 2163 2164 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2165 hotkey_mask_warn_incomplete_mask(); 2166 2167 return rc; 2168} 2169 2170/* 2171 * Sets hotkey_user_mask and tries to set the firmware mask 2172 * 2173 * Call with hotkey_mutex held 2174 */ 2175static int hotkey_user_mask_set(const u32 mask) 2176{ 2177 int rc; 2178 2179 /* Give people a chance to notice they are doing something that 2180 * is bound to go boom on their users sooner or later */ 2181 if (!tp_warned.hotkey_mask_ff && 2182 (mask == 0xffff || mask == 0xffffff || 2183 mask == 0xffffffff)) { 2184 tp_warned.hotkey_mask_ff = 1; 2185 printk(TPACPI_NOTICE 2186 "setting the hotkey mask to 0x%08x is likely " 2187 "not the best way to go about it\n", mask); 2188 printk(TPACPI_NOTICE 2189 "please consider using the driver defaults, " 2190 "and refer to up-to-date thinkpad-acpi " 2191 "documentation\n"); 2192 } 2193 2194 /* Try to enable what the user asked for, plus whatever we need. 2195 * this syncs everything but won't enable bits in hotkey_user_mask */ 2196 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2197 2198 /* Enable the available bits in hotkey_user_mask */ 2199 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2200 2201 return rc; 2202} 2203 2204/* 2205 * Sets the driver hotkey mask. 2206 * 2207 * Can be called even if the hotkey subdriver is inactive 2208 */ 2209static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2210{ 2211 int rc; 2212 2213 /* Do the right thing if hotkey_init has not been called yet */ 2214 if (!tp_features.hotkey) { 2215 hotkey_driver_mask = mask; 2216 return 0; 2217 } 2218 2219 mutex_lock(&hotkey_mutex); 2220 2221 HOTKEY_CONFIG_CRITICAL_START 2222 hotkey_driver_mask = mask; 2223#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2224 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2225#endif 2226 HOTKEY_CONFIG_CRITICAL_END 2227 2228 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2229 ~hotkey_source_mask); 2230 hotkey_poll_setup(true); 2231 2232 mutex_unlock(&hotkey_mutex); 2233 2234 return rc; 2235} 2236 2237static int hotkey_status_get(int *status) 2238{ 2239 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2240 return -EIO; 2241 2242 return 0; 2243} 2244 2245static int hotkey_status_set(bool enable) 2246{ 2247 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2248 return -EIO; 2249 2250 return 0; 2251} 2252 2253static void tpacpi_input_send_tabletsw(void) 2254{ 2255 int state; 2256 2257 if (tp_features.hotkey_tablet && 2258 !hotkey_get_tablet_mode(&state)) { 2259 mutex_lock(&tpacpi_inputdev_send_mutex); 2260 2261 input_report_switch(tpacpi_inputdev, 2262 SW_TABLET_MODE, !!state); 2263 input_sync(tpacpi_inputdev); 2264 2265 mutex_unlock(&tpacpi_inputdev_send_mutex); 2266 } 2267} 2268 2269/* Do NOT call without validating scancode first */ 2270static void tpacpi_input_send_key(const unsigned int scancode) 2271{ 2272 const unsigned int keycode = hotkey_keycode_map[scancode]; 2273 2274 if (keycode != KEY_RESERVED) { 2275 mutex_lock(&tpacpi_inputdev_send_mutex); 2276 2277 input_report_key(tpacpi_inputdev, keycode, 1); 2278 if (keycode == KEY_UNKNOWN) 2279 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, 2280 scancode); 2281 input_sync(tpacpi_inputdev); 2282 2283 input_report_key(tpacpi_inputdev, keycode, 0); 2284 if (keycode == KEY_UNKNOWN) 2285 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, 2286 scancode); 2287 input_sync(tpacpi_inputdev); 2288 2289 mutex_unlock(&tpacpi_inputdev_send_mutex); 2290 } 2291} 2292 2293/* Do NOT call without validating scancode first */ 2294static void tpacpi_input_send_key_masked(const unsigned int scancode) 2295{ 2296 hotkey_driver_event(scancode); 2297 if (hotkey_user_mask & (1 << scancode)) 2298 tpacpi_input_send_key(scancode); 2299} 2300 2301#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2302static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2303 2304/* Do NOT call without validating scancode first */ 2305static void tpacpi_hotkey_send_key(unsigned int scancode) 2306{ 2307 tpacpi_input_send_key_masked(scancode); 2308 if (hotkey_report_mode < 2) { 2309 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device, 2310 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode); 2311 } 2312} 2313 2314static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2315{ 2316 u8 d; 2317 2318 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2319 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2320 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2321 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2322 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2323 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2324 } 2325 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2326 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2327 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2328 } 2329 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2330 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2331 n->displayexp_toggle = 2332 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2333 } 2334 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2335 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2336 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2337 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2338 n->brightness_toggle = 2339 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2340 } 2341 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2342 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2343 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2344 >> TP_NVRAM_POS_LEVEL_VOLUME; 2345 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2346 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2347 } 2348} 2349 2350static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2351 struct tp_nvram_state *newn, 2352 const u32 event_mask) 2353{ 2354 2355#define TPACPI_COMPARE_KEY(__scancode, __member) \ 2356 do { \ 2357 if ((event_mask & (1 << __scancode)) && \ 2358 oldn->__member != newn->__member) \ 2359 tpacpi_hotkey_send_key(__scancode); \ 2360 } while (0) 2361 2362#define TPACPI_MAY_SEND_KEY(__scancode) \ 2363 do { \ 2364 if (event_mask & (1 << __scancode)) \ 2365 tpacpi_hotkey_send_key(__scancode); \ 2366 } while (0) 2367 2368 void issue_volchange(const unsigned int oldvol, 2369 const unsigned int newvol) 2370 { 2371 unsigned int i = oldvol; 2372 2373 while (i > newvol) { 2374 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2375 i--; 2376 } 2377 while (i < newvol) { 2378 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2379 i++; 2380 } 2381 } 2382 2383 void issue_brightnesschange(const unsigned int oldbrt, 2384 const unsigned int newbrt) 2385 { 2386 unsigned int i = oldbrt; 2387 2388 while (i > newbrt) { 2389 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2390 i--; 2391 } 2392 while (i < newbrt) { 2393 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2394 i++; 2395 } 2396 } 2397 2398 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2399 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2400 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2401 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2402 2403 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2404 2405 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2406 2407 /* 2408 * Handle volume 2409 * 2410 * This code is supposed to duplicate the IBM firmware behaviour: 2411 * - Pressing MUTE issues mute hotkey message, even when already mute 2412 * - Pressing Volume up/down issues volume up/down hotkey messages, 2413 * even when already at maximum or minumum volume 2414 * - The act of unmuting issues volume up/down notification, 2415 * depending which key was used to unmute 2416 * 2417 * We are constrained to what the NVRAM can tell us, which is not much 2418 * and certainly not enough if more than one volume hotkey was pressed 2419 * since the last poll cycle. 2420 * 2421 * Just to make our life interesting, some newer Lenovo ThinkPads have 2422 * bugs in the BIOS and may fail to update volume_toggle properly. 2423 */ 2424 if (newn->mute) { 2425 /* muted */ 2426 if (!oldn->mute || 2427 oldn->volume_toggle != newn->volume_toggle || 2428 oldn->volume_level != newn->volume_level) { 2429 /* recently muted, or repeated mute keypress, or 2430 * multiple presses ending in mute */ 2431 issue_volchange(oldn->volume_level, newn->volume_level); 2432 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2433 } 2434 } else { 2435 /* unmute */ 2436 if (oldn->mute) { 2437 /* recently unmuted, issue 'unmute' keypress */ 2438 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2439 } 2440 if (oldn->volume_level != newn->volume_level) { 2441 issue_volchange(oldn->volume_level, newn->volume_level); 2442 } else if (oldn->volume_toggle != newn->volume_toggle) { 2443 /* repeated vol up/down keypress at end of scale ? */ 2444 if (newn->volume_level == 0) 2445 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2446 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2447 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2448 } 2449 } 2450 2451 /* handle brightness */ 2452 if (oldn->brightness_level != newn->brightness_level) { 2453 issue_brightnesschange(oldn->brightness_level, 2454 newn->brightness_level); 2455 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2456 /* repeated key presses that didn't change state */ 2457 if (newn->brightness_level == 0) 2458 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2459 else if (newn->brightness_level >= bright_maxlvl 2460 && !tp_features.bright_unkfw) 2461 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2462 } 2463 2464#undef TPACPI_COMPARE_KEY 2465#undef TPACPI_MAY_SEND_KEY 2466} 2467 2468/* 2469 * Polling driver 2470 * 2471 * We track all events in hotkey_source_mask all the time, since 2472 * most of them are edge-based. We only issue those requested by 2473 * hotkey_user_mask or hotkey_driver_mask, though. 2474 */ 2475static int hotkey_kthread(void *data) 2476{ 2477 struct tp_nvram_state s[2]; 2478 u32 poll_mask, event_mask; 2479 unsigned int si, so; 2480 unsigned long t; 2481 unsigned int change_detector, must_reset; 2482 unsigned int poll_freq; 2483 2484 mutex_lock(&hotkey_thread_mutex); 2485 2486 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2487 goto exit; 2488 2489 set_freezable(); 2490 2491 so = 0; 2492 si = 1; 2493 t = 0; 2494 2495 /* Initial state for compares */ 2496 mutex_lock(&hotkey_thread_data_mutex); 2497 change_detector = hotkey_config_change; 2498 poll_mask = hotkey_source_mask; 2499 event_mask = hotkey_source_mask & 2500 (hotkey_driver_mask | hotkey_user_mask); 2501 poll_freq = hotkey_poll_freq; 2502 mutex_unlock(&hotkey_thread_data_mutex); 2503 hotkey_read_nvram(&s[so], poll_mask); 2504 2505 while (!kthread_should_stop()) { 2506 if (t == 0) { 2507 if (likely(poll_freq)) 2508 t = 1000/poll_freq; 2509 else 2510 t = 100; /* should never happen... */ 2511 } 2512 t = msleep_interruptible(t); 2513 if (unlikely(kthread_should_stop())) 2514 break; 2515 must_reset = try_to_freeze(); 2516 if (t > 0 && !must_reset) 2517 continue; 2518 2519 mutex_lock(&hotkey_thread_data_mutex); 2520 if (must_reset || hotkey_config_change != change_detector) { 2521 /* forget old state on thaw or config change */ 2522 si = so; 2523 t = 0; 2524 change_detector = hotkey_config_change; 2525 } 2526 poll_mask = hotkey_source_mask; 2527 event_mask = hotkey_source_mask & 2528 (hotkey_driver_mask | hotkey_user_mask); 2529 poll_freq = hotkey_poll_freq; 2530 mutex_unlock(&hotkey_thread_data_mutex); 2531 2532 if (likely(poll_mask)) { 2533 hotkey_read_nvram(&s[si], poll_mask); 2534 if (likely(si != so)) { 2535 hotkey_compare_and_issue_event(&s[so], &s[si], 2536 event_mask); 2537 } 2538 } 2539 2540 so = si; 2541 si ^= 1; 2542 } 2543 2544exit: 2545 mutex_unlock(&hotkey_thread_mutex); 2546 return 0; 2547} 2548 2549/* call with hotkey_mutex held */ 2550static void hotkey_poll_stop_sync(void) 2551{ 2552 if (tpacpi_hotkey_task) { 2553 if (frozen(tpacpi_hotkey_task) || 2554 freezing(tpacpi_hotkey_task)) 2555 thaw_process(tpacpi_hotkey_task); 2556 2557 kthread_stop(tpacpi_hotkey_task); 2558 tpacpi_hotkey_task = NULL; 2559 mutex_lock(&hotkey_thread_mutex); 2560 /* at this point, the thread did exit */ 2561 mutex_unlock(&hotkey_thread_mutex); 2562 } 2563} 2564 2565/* call with hotkey_mutex held */ 2566static void hotkey_poll_setup(const bool may_warn) 2567{ 2568 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2569 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2570 2571 if (hotkey_poll_freq > 0 && 2572 (poll_driver_mask || 2573 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2574 if (!tpacpi_hotkey_task) { 2575 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2576 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2577 if (IS_ERR(tpacpi_hotkey_task)) { 2578 tpacpi_hotkey_task = NULL; 2579 printk(TPACPI_ERR 2580 "could not create kernel thread " 2581 "for hotkey polling\n"); 2582 } 2583 } 2584 } else { 2585 hotkey_poll_stop_sync(); 2586 if (may_warn && (poll_driver_mask || poll_user_mask) && 2587 hotkey_poll_freq == 0) { 2588 printk(TPACPI_NOTICE 2589 "hot keys 0x%08x and/or events 0x%08x " 2590 "require polling, which is currently " 2591 "disabled\n", 2592 poll_user_mask, poll_driver_mask); 2593 } 2594 } 2595} 2596 2597static void hotkey_poll_setup_safe(const bool may_warn) 2598{ 2599 mutex_lock(&hotkey_mutex); 2600 hotkey_poll_setup(may_warn); 2601 mutex_unlock(&hotkey_mutex); 2602} 2603 2604/* call with hotkey_mutex held */ 2605static void hotkey_poll_set_freq(unsigned int freq) 2606{ 2607 if (!freq) 2608 hotkey_poll_stop_sync(); 2609 2610 hotkey_poll_freq = freq; 2611} 2612 2613#else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2614 2615static void hotkey_poll_setup(const bool __unused) 2616{ 2617} 2618 2619static void hotkey_poll_setup_safe(const bool __unused) 2620{ 2621} 2622 2623#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2624 2625static int hotkey_inputdev_open(struct input_dev *dev) 2626{ 2627 switch (tpacpi_lifecycle) { 2628 case TPACPI_LIFE_INIT: 2629 case TPACPI_LIFE_RUNNING: 2630 hotkey_poll_setup_safe(false); 2631 return 0; 2632 case TPACPI_LIFE_EXITING: 2633 return -EBUSY; 2634 } 2635 2636 /* Should only happen if tpacpi_lifecycle is corrupt */ 2637 BUG(); 2638 return -EBUSY; 2639} 2640 2641static void hotkey_inputdev_close(struct input_dev *dev) 2642{ 2643 /* disable hotkey polling when possible */ 2644 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2645 !(hotkey_source_mask & hotkey_driver_mask)) 2646 hotkey_poll_setup_safe(false); 2647} 2648 2649/* sysfs hotkey enable ------------------------------------------------- */ 2650static ssize_t hotkey_enable_show(struct device *dev, 2651 struct device_attribute *attr, 2652 char *buf) 2653{ 2654 int res, status; 2655 2656 printk_deprecated_attribute("hotkey_enable", 2657 "Hotkey reporting is always enabled"); 2658 2659 res = hotkey_status_get(&status); 2660 if (res) 2661 return res; 2662 2663 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2664} 2665 2666static ssize_t hotkey_enable_store(struct device *dev, 2667 struct device_attribute *attr, 2668 const char *buf, size_t count) 2669{ 2670 unsigned long t; 2671 2672 printk_deprecated_attribute("hotkey_enable", 2673 "Hotkeys can be disabled through hotkey_mask"); 2674 2675 if (parse_strtoul(buf, 1, &t)) 2676 return -EINVAL; 2677 2678 if (t == 0) 2679 return -EPERM; 2680 2681 return count; 2682} 2683 2684static struct device_attribute dev_attr_hotkey_enable = 2685 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO, 2686 hotkey_enable_show, hotkey_enable_store); 2687 2688/* sysfs hotkey mask --------------------------------------------------- */ 2689static ssize_t hotkey_mask_show(struct device *dev, 2690 struct device_attribute *attr, 2691 char *buf) 2692{ 2693 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2694} 2695 2696static ssize_t hotkey_mask_store(struct device *dev, 2697 struct device_attribute *attr, 2698 const char *buf, size_t count) 2699{ 2700 unsigned long t; 2701 int res; 2702 2703 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2704 return -EINVAL; 2705 2706 if (mutex_lock_killable(&hotkey_mutex)) 2707 return -ERESTARTSYS; 2708 2709 res = hotkey_user_mask_set(t); 2710 2711#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2712 hotkey_poll_setup(true); 2713#endif 2714 2715 mutex_unlock(&hotkey_mutex); 2716 2717 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2718 2719 return (res) ? res : count; 2720} 2721 2722static struct device_attribute dev_attr_hotkey_mask = 2723 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO, 2724 hotkey_mask_show, hotkey_mask_store); 2725 2726/* sysfs hotkey bios_enabled ------------------------------------------- */ 2727static ssize_t hotkey_bios_enabled_show(struct device *dev, 2728 struct device_attribute *attr, 2729 char *buf) 2730{ 2731 return sprintf(buf, "0\n"); 2732} 2733 2734static struct device_attribute dev_attr_hotkey_bios_enabled = 2735 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL); 2736 2737/* sysfs hotkey bios_mask ---------------------------------------------- */ 2738static ssize_t hotkey_bios_mask_show(struct device *dev, 2739 struct device_attribute *attr, 2740 char *buf) 2741{ 2742 printk_deprecated_attribute("hotkey_bios_mask", 2743 "This attribute is useless."); 2744 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2745} 2746 2747static struct device_attribute dev_attr_hotkey_bios_mask = 2748 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL); 2749 2750/* sysfs hotkey all_mask ----------------------------------------------- */ 2751static ssize_t hotkey_all_mask_show(struct device *dev, 2752 struct device_attribute *attr, 2753 char *buf) 2754{ 2755 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2756 hotkey_all_mask | hotkey_source_mask); 2757} 2758 2759static struct device_attribute dev_attr_hotkey_all_mask = 2760 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL); 2761 2762/* sysfs hotkey recommended_mask --------------------------------------- */ 2763static ssize_t hotkey_recommended_mask_show(struct device *dev, 2764 struct device_attribute *attr, 2765 char *buf) 2766{ 2767 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2768 (hotkey_all_mask | hotkey_source_mask) 2769 & ~hotkey_reserved_mask); 2770} 2771 2772static struct device_attribute dev_attr_hotkey_recommended_mask = 2773 __ATTR(hotkey_recommended_mask, S_IRUGO, 2774 hotkey_recommended_mask_show, NULL); 2775 2776#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2777 2778/* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2779static ssize_t hotkey_source_mask_show(struct device *dev, 2780 struct device_attribute *attr, 2781 char *buf) 2782{ 2783 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2784} 2785 2786static ssize_t hotkey_source_mask_store(struct device *dev, 2787 struct device_attribute *attr, 2788 const char *buf, size_t count) 2789{ 2790 unsigned long t; 2791 u32 r_ev; 2792 int rc; 2793 2794 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2795 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2796 return -EINVAL; 2797 2798 if (mutex_lock_killable(&hotkey_mutex)) 2799 return -ERESTARTSYS; 2800 2801 HOTKEY_CONFIG_CRITICAL_START 2802 hotkey_source_mask = t; 2803 HOTKEY_CONFIG_CRITICAL_END 2804 2805 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2806 ~hotkey_source_mask); 2807 hotkey_poll_setup(true); 2808 2809 /* check if events needed by the driver got disabled */ 2810 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2811 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2812 2813 mutex_unlock(&hotkey_mutex); 2814 2815 if (rc < 0) 2816 printk(TPACPI_ERR "hotkey_source_mask: failed to update the" 2817 "firmware event mask!\n"); 2818 2819 if (r_ev) 2820 printk(TPACPI_NOTICE "hotkey_source_mask: " 2821 "some important events were disabled: " 2822 "0x%04x\n", r_ev); 2823 2824 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2825 2826 return (rc < 0) ? rc : count; 2827} 2828 2829static struct device_attribute dev_attr_hotkey_source_mask = 2830 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO, 2831 hotkey_source_mask_show, hotkey_source_mask_store); 2832 2833/* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2834static ssize_t hotkey_poll_freq_show(struct device *dev, 2835 struct device_attribute *attr, 2836 char *buf) 2837{ 2838 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2839} 2840 2841static ssize_t hotkey_poll_freq_store(struct device *dev, 2842 struct device_attribute *attr, 2843 const char *buf, size_t count) 2844{ 2845 unsigned long t; 2846 2847 if (parse_strtoul(buf, 25, &t)) 2848 return -EINVAL; 2849 2850 if (mutex_lock_killable(&hotkey_mutex)) 2851 return -ERESTARTSYS; 2852 2853 hotkey_poll_set_freq(t); 2854 hotkey_poll_setup(true); 2855 2856 mutex_unlock(&hotkey_mutex); 2857 2858 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2859 2860 return count; 2861} 2862 2863static struct device_attribute dev_attr_hotkey_poll_freq = 2864 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO, 2865 hotkey_poll_freq_show, hotkey_poll_freq_store); 2866 2867#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2868 2869/* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2870static ssize_t hotkey_radio_sw_show(struct device *dev, 2871 struct device_attribute *attr, 2872 char *buf) 2873{ 2874 int res; 2875 res = hotkey_get_wlsw(); 2876 if (res < 0) 2877 return res; 2878 2879 /* Opportunistic update */ 2880 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2881 2882 return snprintf(buf, PAGE_SIZE, "%d\n", 2883 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2884} 2885 2886static struct device_attribute dev_attr_hotkey_radio_sw = 2887 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL); 2888 2889static void hotkey_radio_sw_notify_change(void) 2890{ 2891 if (tp_features.hotkey_wlsw) 2892 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2893 "hotkey_radio_sw"); 2894} 2895 2896/* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2897static ssize_t hotkey_tablet_mode_show(struct device *dev, 2898 struct device_attribute *attr, 2899 char *buf) 2900{ 2901 int res, s; 2902 res = hotkey_get_tablet_mode(&s); 2903 if (res < 0) 2904 return res; 2905 2906 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2907} 2908 2909static struct device_attribute dev_attr_hotkey_tablet_mode = 2910 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL); 2911 2912static void hotkey_tablet_mode_notify_change(void) 2913{ 2914 if (tp_features.hotkey_tablet) 2915 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2916 "hotkey_tablet_mode"); 2917} 2918 2919/* sysfs hotkey report_mode -------------------------------------------- */ 2920static ssize_t hotkey_report_mode_show(struct device *dev, 2921 struct device_attribute *attr, 2922 char *buf) 2923{ 2924 return snprintf(buf, PAGE_SIZE, "%d\n", 2925 (hotkey_report_mode != 0) ? hotkey_report_mode : 1); 2926} 2927 2928static struct device_attribute dev_attr_hotkey_report_mode = 2929 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL); 2930 2931/* sysfs wakeup reason (pollable) -------------------------------------- */ 2932static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2933 struct device_attribute *attr, 2934 char *buf) 2935{ 2936 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2937} 2938 2939static struct device_attribute dev_attr_hotkey_wakeup_reason = 2940 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2941 2942static void hotkey_wakeup_reason_notify_change(void) 2943{ 2944 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2945 "wakeup_reason"); 2946} 2947 2948/* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2949static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2950 struct device_attribute *attr, 2951 char *buf) 2952{ 2953 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2954} 2955 2956static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete = 2957 __ATTR(wakeup_hotunplug_complete, S_IRUGO, 2958 hotkey_wakeup_hotunplug_complete_show, NULL); 2959 2960static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2961{ 2962 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2963 "wakeup_hotunplug_complete"); 2964} 2965 2966/* --------------------------------------------------------------------- */ 2967 2968static struct attribute *hotkey_attributes[] __initdata = { 2969 &dev_attr_hotkey_enable.attr, 2970 &dev_attr_hotkey_bios_enabled.attr, 2971 &dev_attr_hotkey_bios_mask.attr, 2972 &dev_attr_hotkey_report_mode.attr, 2973 &dev_attr_hotkey_wakeup_reason.attr, 2974 &dev_attr_hotkey_wakeup_hotunplug_complete.attr, 2975 &dev_attr_hotkey_mask.attr, 2976 &dev_attr_hotkey_all_mask.attr, 2977 &dev_attr_hotkey_recommended_mask.attr, 2978#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2979 &dev_attr_hotkey_source_mask.attr, 2980 &dev_attr_hotkey_poll_freq.attr, 2981#endif 2982}; 2983 2984/* 2985 * Sync both the hw and sw blocking state of all switches 2986 */ 2987static void tpacpi_send_radiosw_update(void) 2988{ 2989 int wlsw; 2990 2991 /* 2992 * We must sync all rfkill controllers *before* issuing any 2993 * rfkill input events, or we will race the rfkill core input 2994 * handler. 2995 * 2996 * tpacpi_inputdev_send_mutex works as a syncronization point 2997 * for the above. 2998 * 2999 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3000 */ 3001 3002 wlsw = hotkey_get_wlsw(); 3003 3004 /* Sync hw blocking state first if it is hw-blocked */ 3005 if (wlsw == TPACPI_RFK_RADIO_OFF) 3006 tpacpi_rfk_update_hwblock_state(true); 3007 3008 /* Sync sw blocking state */ 3009 tpacpi_rfk_update_swstate_all(); 3010 3011 /* Sync hw blocking state last if it is hw-unblocked */ 3012 if (wlsw == TPACPI_RFK_RADIO_ON) 3013 tpacpi_rfk_update_hwblock_state(false); 3014 3015 /* Issue rfkill input event for WLSW switch */ 3016 if (!(wlsw < 0)) { 3017 mutex_lock(&tpacpi_inputdev_send_mutex); 3018 3019 input_report_switch(tpacpi_inputdev, 3020 SW_RFKILL_ALL, (wlsw > 0)); 3021 input_sync(tpacpi_inputdev); 3022 3023 mutex_unlock(&tpacpi_inputdev_send_mutex); 3024 } 3025 3026 /* 3027 * this can be unconditional, as we will poll state again 3028 * if userspace uses the notify to read data 3029 */ 3030 hotkey_radio_sw_notify_change(); 3031} 3032 3033static void hotkey_exit(void) 3034{ 3035#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3036 mutex_lock(&hotkey_mutex); 3037 hotkey_poll_stop_sync(); 3038 mutex_unlock(&hotkey_mutex); 3039#endif 3040 3041 if (hotkey_dev_attributes) 3042 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3043 3044 kfree(hotkey_keycode_map); 3045 3046 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3047 "restoring original HKEY status and mask\n"); 3048 /* yes, there is a bitwise or below, we want the 3049 * functions to be called even if one of them fail */ 3050 if (((tp_features.hotkey_mask && 3051 hotkey_mask_set(hotkey_orig_mask)) | 3052 hotkey_status_set(false)) != 0) 3053 printk(TPACPI_ERR 3054 "failed to restore hot key mask " 3055 "to BIOS defaults\n"); 3056} 3057 3058static void __init hotkey_unmap(const unsigned int scancode) 3059{ 3060 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3061 clear_bit(hotkey_keycode_map[scancode], 3062 tpacpi_inputdev->keybit); 3063 hotkey_keycode_map[scancode] = KEY_RESERVED; 3064 } 3065} 3066 3067/* 3068 * HKEY quirks: 3069 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3070 */ 3071 3072#define TPACPI_HK_Q_INIMASK 0x0001 3073 3074static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3075 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3076 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3077 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3078 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3079 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3080 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3081 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3082 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3083 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3084 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3085 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3086 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3087 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3088 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3089 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3090 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3091 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3092 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3093 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3094}; 3095 3096typedef u16 tpacpi_keymap_entry_t; 3097typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3098 3099static int __init hotkey_init(struct ibm_init_struct *iibm) 3100{ 3101 /* Requirements for changing the default keymaps: 3102 * 3103 * 1. Many of the keys are mapped to KEY_RESERVED for very 3104 * good reasons. Do not change them unless you have deep 3105 * knowledge on the IBM and Lenovo ThinkPad firmware for 3106 * the various ThinkPad models. The driver behaves 3107 * differently for KEY_RESERVED: such keys have their 3108 * hot key mask *unset* in mask_recommended, and also 3109 * in the initial hot key mask programmed into the 3110 * firmware at driver load time, which means the firm- 3111 * ware may react very differently if you change them to 3112 * something else; 3113 * 3114 * 2. You must be subscribed to the linux-thinkpad and 3115 * ibm-acpi-devel mailing lists, and you should read the 3116 * list archives since 2007 if you want to change the 3117 * keymaps. This requirement exists so that you will 3118 * know the past history of problems with the thinkpad- 3119 * acpi driver keymaps, and also that you will be 3120 * listening to any bug reports; 3121 * 3122 * 3. Do not send thinkpad-acpi specific patches directly to 3123 * for merging, *ever*. Send them to the linux-acpi 3124 * mailinglist for comments. Merging is to be done only 3125 * through acpi-test and the ACPI maintainer. 3126 * 3127 * If the above is too much to ask, don't change the keymap. 3128 * Ask the thinkpad-acpi maintainer to do it, instead. 3129 */ 3130 3131 enum keymap_index { 3132 TPACPI_KEYMAP_IBM_GENERIC = 0, 3133 TPACPI_KEYMAP_LENOVO_GENERIC, 3134 }; 3135 3136 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3137 /* Generic keymap for IBM ThinkPads */ 3138 [TPACPI_KEYMAP_IBM_GENERIC] = { 3139 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3140 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3141 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3142 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3143 3144 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3145 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3146 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3147 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3148 3149 /* brightness: firmware always reacts to them */ 3150 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3151 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3152 3153 /* Thinklight: firmware always react to it */ 3154 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3155 3156 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3157 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3158 3159 /* Volume: firmware always react to it and reprograms 3160 * the built-in *extra* mixer. Never map it to control 3161 * another mixer by default. */ 3162 KEY_RESERVED, /* 0x14: VOLUME UP */ 3163 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3164 KEY_RESERVED, /* 0x16: MUTE */ 3165 3166 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3167 3168 /* (assignments unknown, please report if found) */ 3169 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3170 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3171 }, 3172 3173 /* Generic keymap for Lenovo ThinkPads */ 3174 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3175 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3176 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3177 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3178 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3179 3180 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3181 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3182 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3183 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3184 3185 /* These should be enabled --only-- when ACPI video 3186 * is disabled (i.e. in "vendor" mode), and are handled 3187 * in a special way by the init code */ 3188 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3189 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3190 3191 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3192 3193 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3194 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3195 3196 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3197 * react to it and reprograms the built-in *extra* mixer. 3198 * Never map it to control another mixer by default. 3199 * 3200 * T60?, T61, R60?, R61: firmware and EC tries to send 3201 * these over the regular keyboard, so these are no-ops, 3202 * but there are still weird bugs re. MUTE, so do not 3203 * change unless you get test reports from all Lenovo 3204 * models. May cause the BIOS to interfere with the 3205 * HDA mixer. 3206 */ 3207 KEY_RESERVED, /* 0x14: VOLUME UP */ 3208 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3209 KEY_RESERVED, /* 0x16: MUTE */ 3210 3211 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3212 3213 /* (assignments unknown, please report if found) */ 3214 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3215 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3216 }, 3217 }; 3218 3219 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3220 /* Generic maps (fallback) */ 3221 { 3222 .vendor = PCI_VENDOR_ID_IBM, 3223 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3224 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3225 }, 3226 { 3227 .vendor = PCI_VENDOR_ID_LENOVO, 3228 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3229 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3230 }, 3231 }; 3232 3233#define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3234#define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3235 3236 int res, i; 3237 int status; 3238 int hkeyv; 3239 bool radiosw_state = false; 3240 bool tabletsw_state = false; 3241 3242 unsigned long quirks; 3243 unsigned long keymap_id; 3244 3245 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3246 "initializing hotkey subdriver\n"); 3247 3248 BUG_ON(!tpacpi_inputdev); 3249 BUG_ON(tpacpi_inputdev->open != NULL || 3250 tpacpi_inputdev->close != NULL); 3251 3252 TPACPI_ACPIHANDLE_INIT(hkey); 3253 mutex_init(&hotkey_mutex); 3254 3255#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3256 mutex_init(&hotkey_thread_mutex); 3257 mutex_init(&hotkey_thread_data_mutex); 3258#endif 3259 3260 /* hotkey not supported on 570 */ 3261 tp_features.hotkey = hkey_handle != NULL; 3262 3263 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3264 "hotkeys are %s\n", 3265 str_supported(tp_features.hotkey)); 3266 3267 if (!tp_features.hotkey) 3268 return 1; 3269 3270 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3271 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3272 3273 tpacpi_disable_brightness_delay(); 3274 3275 /* MUST have enough space for all attributes to be added to 3276 * hotkey_dev_attributes */ 3277 hotkey_dev_attributes = create_attr_set( 3278 ARRAY_SIZE(hotkey_attributes) + 2, 3279 NULL); 3280 if (!hotkey_dev_attributes) 3281 return -ENOMEM; 3282 res = add_many_to_attr_set(hotkey_dev_attributes, 3283 hotkey_attributes, 3284 ARRAY_SIZE(hotkey_attributes)); 3285 if (res) 3286 goto err_exit; 3287 3288 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3289 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3290 for HKEY interface version 0x100 */ 3291 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3292 if ((hkeyv >> 8) != 1) { 3293 printk(TPACPI_ERR "unknown version of the " 3294 "HKEY interface: 0x%x\n", hkeyv); 3295 printk(TPACPI_ERR "please report this to %s\n", 3296 TPACPI_MAIL); 3297 } else { 3298 /* 3299 * MHKV 0x100 in A31, R40, R40e, 3300 * T4x, X31, and later 3301 */ 3302 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3303 "firmware HKEY interface version: 0x%x\n", 3304 hkeyv); 3305 3306 /* Paranoia check AND init hotkey_all_mask */ 3307 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3308 "MHKA", "qd")) { 3309 printk(TPACPI_ERR 3310 "missing MHKA handler, " 3311 "please report this to %s\n", 3312 TPACPI_MAIL); 3313 /* Fallback: pre-init for FN+F3,F4,F12 */ 3314 hotkey_all_mask = 0x080cU; 3315 } else { 3316 tp_features.hotkey_mask = 1; 3317 } 3318 } 3319 } 3320 3321 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3322 "hotkey masks are %s\n", 3323 str_supported(tp_features.hotkey_mask)); 3324 3325 /* Init hotkey_all_mask if not initialized yet */ 3326 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3327 (quirks & TPACPI_HK_Q_INIMASK)) 3328 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3329 3330 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3331 if (tp_features.hotkey_mask) { 3332 /* hotkey_source_mask *must* be zero for 3333 * the first hotkey_mask_get to return hotkey_orig_mask */ 3334 res = hotkey_mask_get(); 3335 if (res) 3336 goto err_exit; 3337 3338 hotkey_orig_mask = hotkey_acpi_mask; 3339 } else { 3340 hotkey_orig_mask = hotkey_all_mask; 3341 hotkey_acpi_mask = hotkey_all_mask; 3342 } 3343 3344#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3345 if (dbg_wlswemul) { 3346 tp_features.hotkey_wlsw = 1; 3347 radiosw_state = !!tpacpi_wlsw_emulstate; 3348 printk(TPACPI_INFO 3349 "radio switch emulation enabled\n"); 3350 } else 3351#endif 3352 /* Not all thinkpads have a hardware radio switch */ 3353 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3354 tp_features.hotkey_wlsw = 1; 3355 radiosw_state = !!status; 3356 printk(TPACPI_INFO 3357 "radio switch found; radios are %s\n", 3358 enabled(status, 0)); 3359 } 3360 if (tp_features.hotkey_wlsw) 3361 res = add_to_attr_set(hotkey_dev_attributes, 3362 &dev_attr_hotkey_radio_sw.attr); 3363 3364 /* For X41t, X60t, X61t Tablets... */ 3365 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3366 tp_features.hotkey_tablet = 1; 3367 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); 3368 printk(TPACPI_INFO 3369 "possible tablet mode switch found; " 3370 "ThinkPad in %s mode\n", 3371 (tabletsw_state) ? "tablet" : "laptop"); 3372 res = add_to_attr_set(hotkey_dev_attributes, 3373 &dev_attr_hotkey_tablet_mode.attr); 3374 } 3375 3376 if (!res) 3377 res = register_attr_set_with_sysfs( 3378 hotkey_dev_attributes, 3379 &tpacpi_pdev->dev.kobj); 3380 if (res) 3381 goto err_exit; 3382 3383 /* Set up key map */ 3384 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3385 GFP_KERNEL); 3386 if (!hotkey_keycode_map) { 3387 printk(TPACPI_ERR 3388 "failed to allocate memory for key map\n"); 3389 res = -ENOMEM; 3390 goto err_exit; 3391 } 3392 3393 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3394 ARRAY_SIZE(tpacpi_keymap_qtable)); 3395 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3396 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3397 "using keymap number %lu\n", keymap_id); 3398 3399 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3400 TPACPI_HOTKEY_MAP_SIZE); 3401 3402 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3403 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3404 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3405 tpacpi_inputdev->keycode = hotkey_keycode_map; 3406 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3407 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3408 input_set_capability(tpacpi_inputdev, EV_KEY, 3409 hotkey_keycode_map[i]); 3410 } else { 3411 if (i < sizeof(hotkey_reserved_mask)*8) 3412 hotkey_reserved_mask |= 1 << i; 3413 } 3414 } 3415 3416 if (tp_features.hotkey_wlsw) { 3417 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3418 input_report_switch(tpacpi_inputdev, 3419 SW_RFKILL_ALL, radiosw_state); 3420 } 3421 if (tp_features.hotkey_tablet) { 3422 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3423 input_report_switch(tpacpi_inputdev, 3424 SW_TABLET_MODE, tabletsw_state); 3425 } 3426 3427 /* Do not issue duplicate brightness change events to 3428 * userspace. tpacpi_detect_brightness_capabilities() must have 3429 * been called before this point */ 3430 if (tp_features.bright_acpimode && acpi_video_backlight_support()) { 3431 printk(TPACPI_INFO 3432 "This ThinkPad has standard ACPI backlight " 3433 "brightness control, supported by the ACPI " 3434 "video driver\n"); 3435 printk(TPACPI_NOTICE 3436 "Disabling thinkpad-acpi brightness events " 3437 "by default...\n"); 3438 3439 /* Disable brightness up/down on Lenovo thinkpads when 3440 * ACPI is handling them, otherwise it is plain impossible 3441 * for userspace to do something even remotely sane */ 3442 hotkey_reserved_mask |= 3443 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3444 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3445 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3446 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3447 } 3448 3449#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3450 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3451 & ~hotkey_all_mask 3452 & ~hotkey_reserved_mask; 3453 3454 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3455 "hotkey source mask 0x%08x, polling freq %u\n", 3456 hotkey_source_mask, hotkey_poll_freq); 3457#endif 3458 3459 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3460 "enabling firmware HKEY event interface...\n"); 3461 res = hotkey_status_set(true); 3462 if (res) { 3463 hotkey_exit(); 3464 return res; 3465 } 3466 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3467 | hotkey_driver_mask) 3468 & ~hotkey_source_mask); 3469 if (res < 0 && res != -ENXIO) { 3470 hotkey_exit(); 3471 return res; 3472 } 3473 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3474 & ~hotkey_reserved_mask; 3475 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3476 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3477 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3478 3479 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3480 "legacy ibm/hotkey event reporting over procfs %s\n", 3481 (hotkey_report_mode < 2) ? 3482 "enabled" : "disabled"); 3483 3484 tpacpi_inputdev->open = &hotkey_inputdev_open; 3485 tpacpi_inputdev->close = &hotkey_inputdev_close; 3486 3487 hotkey_poll_setup_safe(true); 3488 3489 return 0; 3490 3491err_exit: 3492 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3493 hotkey_dev_attributes = NULL; 3494 3495 return (res < 0)? res : 1; 3496} 3497 3498static bool hotkey_notify_hotkey(const u32 hkey, 3499 bool *send_acpi_ev, 3500 bool *ignore_acpi_ev) 3501{ 3502 /* 0x1000-0x1FFF: key presses */ 3503 unsigned int scancode = hkey & 0xfff; 3504 *send_acpi_ev = true; 3505 *ignore_acpi_ev = false; 3506 3507 /* HKEY event 0x1001 is scancode 0x00 */ 3508 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3509 scancode--; 3510 if (!(hotkey_source_mask & (1 << scancode))) { 3511 tpacpi_input_send_key_masked(scancode); 3512 *send_acpi_ev = false; 3513 } else { 3514 *ignore_acpi_ev = true; 3515 } 3516 return true; 3517 } 3518 return false; 3519} 3520 3521static bool hotkey_notify_wakeup(const u32 hkey, 3522 bool *send_acpi_ev, 3523 bool *ignore_acpi_ev) 3524{ 3525 /* 0x2000-0x2FFF: Wakeup reason */ 3526 *send_acpi_ev = true; 3527 *ignore_acpi_ev = false; 3528 3529 switch (hkey) { 3530 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3531 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3532 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3533 *ignore_acpi_ev = true; 3534 break; 3535 3536 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3537 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3538 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3539 *ignore_acpi_ev = true; 3540 break; 3541 3542 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3543 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3544 printk(TPACPI_ALERT 3545 "EMERGENCY WAKEUP: battery almost empty\n"); 3546 /* how to auto-heal: */ 3547 /* 2313: woke up from S3, go to S4/S5 */ 3548 /* 2413: woke up from S4, go to S5 */ 3549 break; 3550 3551 default: 3552 return false; 3553 } 3554 3555 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3556 printk(TPACPI_INFO 3557 "woke up due to a hot-unplug " 3558 "request...\n"); 3559 hotkey_wakeup_reason_notify_change(); 3560 } 3561 return true; 3562} 3563 3564static bool hotkey_notify_usrevent(const u32 hkey, 3565 bool *send_acpi_ev, 3566 bool *ignore_acpi_ev) 3567{ 3568 /* 0x5000-0x5FFF: human interface helpers */ 3569 *send_acpi_ev = true; 3570 *ignore_acpi_ev = false; 3571 3572 switch (hkey) { 3573 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3574 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3575 return true; 3576 3577 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3578 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3579 tpacpi_input_send_tabletsw(); 3580 hotkey_tablet_mode_notify_change(); 3581 *send_acpi_ev = false; 3582 return true; 3583 3584 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3585 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3586 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3587 /* do not propagate these events */ 3588 *ignore_acpi_ev = true; 3589 return true; 3590 3591 default: 3592 return false; 3593 } 3594} 3595 3596static void thermal_dump_all_sensors(void); 3597 3598static bool hotkey_notify_thermal(const u32 hkey, 3599 bool *send_acpi_ev, 3600 bool *ignore_acpi_ev) 3601{ 3602 bool known = true; 3603 3604 /* 0x6000-0x6FFF: thermal alarms */ 3605 *send_acpi_ev = true; 3606 *ignore_acpi_ev = false; 3607 3608 switch (hkey) { 3609 case TP_HKEY_EV_THM_TABLE_CHANGED: 3610 printk(TPACPI_INFO 3611 "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 printk(TPACPI_CRIT 3617 "THERMAL ALARM: battery is too hot!\n"); 3618 /* recommended action: warn user through gui */ 3619 break; 3620 case TP_HKEY_EV_ALARM_BAT_XHOT: 3621 printk(TPACPI_ALERT 3622 "THERMAL EMERGENCY: battery is extremely hot!\n"); 3623 /* recommended action: immediate sleep/hibernate */ 3624 break; 3625 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3626 printk(TPACPI_CRIT 3627 "THERMAL ALARM: " 3628 "a sensor reports something is too hot!\n"); 3629 /* recommended action: warn user through gui, that */ 3630 /* some internal component is too hot */ 3631 break; 3632 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3633 printk(TPACPI_ALERT 3634 "THERMAL EMERGENCY: " 3635 "a sensor reports something is extremely hot!\n"); 3636 /* recommended action: immediate sleep/hibernate */ 3637 break; 3638 default: 3639 printk(TPACPI_ALERT 3640 "THERMAL ALERT: unknown thermal alarm received\n"); 3641 known = false; 3642 } 3643 3644 thermal_dump_all_sensors(); 3645 3646 return known; 3647} 3648 3649static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3650{ 3651 u32 hkey; 3652 bool send_acpi_ev; 3653 bool ignore_acpi_ev; 3654 bool known_ev; 3655 3656 if (event != 0x80) { 3657 printk(TPACPI_ERR 3658 "unknown HKEY notification event %d\n", event); 3659 /* forward it to userspace, maybe it knows how to handle it */ 3660 acpi_bus_generate_netlink_event( 3661 ibm->acpi->device->pnp.device_class, 3662 dev_name(&ibm->acpi->device->dev), 3663 event, 0); 3664 return; 3665 } 3666 3667 while (1) { 3668 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3669 printk(TPACPI_ERR "failed to retrieve HKEY event\n"); 3670 return; 3671 } 3672 3673 if (hkey == 0) { 3674 /* queue empty */ 3675 return; 3676 } 3677 3678 send_acpi_ev = true; 3679 ignore_acpi_ev = false; 3680 3681 switch (hkey >> 12) { 3682 case 1: 3683 /* 0x1000-0x1FFF: key presses */ 3684 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3685 &ignore_acpi_ev); 3686 break; 3687 case 2: 3688 /* 0x2000-0x2FFF: Wakeup reason */ 3689 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3690 &ignore_acpi_ev); 3691 break; 3692 case 3: 3693 /* 0x3000-0x3FFF: bay-related wakeups */ 3694 switch (hkey) { 3695 case TP_HKEY_EV_BAYEJ_ACK: 3696 hotkey_autosleep_ack = 1; 3697 printk(TPACPI_INFO 3698 "bay ejected\n"); 3699 hotkey_wakeup_hotunplug_complete_notify_change(); 3700 known_ev = true; 3701 break; 3702 case TP_HKEY_EV_OPTDRV_EJ: 3703 known_ev = true; 3704 break; 3705 default: 3706 known_ev = false; 3707 } 3708 break; 3709 case 4: 3710 /* 0x4000-0x4FFF: dock-related wakeups */ 3711 if (hkey == TP_HKEY_EV_UNDOCK_ACK) { 3712 hotkey_autosleep_ack = 1; 3713 printk(TPACPI_INFO 3714 "undocked\n"); 3715 hotkey_wakeup_hotunplug_complete_notify_change(); 3716 known_ev = true; 3717 } else { 3718 known_ev = false; 3719 } 3720 break; 3721 case 5: 3722 /* 0x5000-0x5FFF: human interface helpers */ 3723 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3724 &ignore_acpi_ev); 3725 break; 3726 case 6: 3727 /* 0x6000-0x6FFF: thermal alarms */ 3728 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev, 3729 &ignore_acpi_ev); 3730 break; 3731 case 7: 3732 /* 0x7000-0x7FFF: misc */ 3733 if (tp_features.hotkey_wlsw && 3734 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3735 tpacpi_send_radiosw_update(); 3736 send_acpi_ev = 0; 3737 known_ev = true; 3738 break; 3739 } 3740 /* fallthrough to default */ 3741 default: 3742 known_ev = false; 3743 } 3744 if (!known_ev) { 3745 printk(TPACPI_NOTICE 3746 "unhandled HKEY event 0x%04x\n", hkey); 3747 printk(TPACPI_NOTICE 3748 "please report the conditions when this " 3749 "event happened to %s\n", TPACPI_MAIL); 3750 } 3751 3752 /* Legacy events */ 3753 if (!ignore_acpi_ev && 3754 (send_acpi_ev || hotkey_report_mode < 2)) { 3755 acpi_bus_generate_proc_event(ibm->acpi->device, 3756 event, hkey); 3757 } 3758 3759 /* netlink events */ 3760 if (!ignore_acpi_ev && send_acpi_ev) { 3761 acpi_bus_generate_netlink_event( 3762 ibm->acpi->device->pnp.device_class, 3763 dev_name(&ibm->acpi->device->dev), 3764 event, hkey); 3765 } 3766 } 3767} 3768 3769static void hotkey_suspend(pm_message_t state) 3770{ 3771 /* Do these on suspend, we get the events on early resume! */ 3772 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 3773 hotkey_autosleep_ack = 0; 3774} 3775 3776static void hotkey_resume(void) 3777{ 3778 tpacpi_disable_brightness_delay(); 3779 3780 if (hotkey_status_set(true) < 0 || 3781 hotkey_mask_set(hotkey_acpi_mask) < 0) 3782 printk(TPACPI_ERR 3783 "error while attempting to reset the event " 3784 "firmware interface\n"); 3785 3786 tpacpi_send_radiosw_update(); 3787 hotkey_tablet_mode_notify_change(); 3788 hotkey_wakeup_reason_notify_change(); 3789 hotkey_wakeup_hotunplug_complete_notify_change(); 3790 hotkey_poll_setup_safe(false); 3791} 3792 3793/* procfs -------------------------------------------------------------- */ 3794static int hotkey_read(struct seq_file *m) 3795{ 3796 int res, status; 3797 3798 if (!tp_features.hotkey) { 3799 seq_printf(m, "status:\t\tnot supported\n"); 3800 return 0; 3801 } 3802 3803 if (mutex_lock_killable(&hotkey_mutex)) 3804 return -ERESTARTSYS; 3805 res = hotkey_status_get(&status); 3806 if (!res) 3807 res = hotkey_mask_get(); 3808 mutex_unlock(&hotkey_mutex); 3809 if (res) 3810 return res; 3811 3812 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 3813 if (hotkey_all_mask) { 3814 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 3815 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 3816 } else { 3817 seq_printf(m, "mask:\t\tnot supported\n"); 3818 seq_printf(m, "commands:\tenable, disable, reset\n"); 3819 } 3820 3821 return 0; 3822} 3823 3824static void hotkey_enabledisable_warn(bool enable) 3825{ 3826 tpacpi_log_usertask("procfs hotkey enable/disable"); 3827 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 3828 TPACPI_WARN 3829 "hotkey enable/disable functionality has been " 3830 "removed from the driver. Hotkeys are always " 3831 "enabled\n")) 3832 printk(TPACPI_ERR 3833 "Please remove the hotkey=enable module " 3834 "parameter, it is deprecated. Hotkeys are always " 3835 "enabled\n"); 3836} 3837 3838static int hotkey_write(char *buf) 3839{ 3840 int res; 3841 u32 mask; 3842 char *cmd; 3843 3844 if (!tp_features.hotkey) 3845 return -ENODEV; 3846 3847 if (mutex_lock_killable(&hotkey_mutex)) 3848 return -ERESTARTSYS; 3849 3850 mask = hotkey_user_mask; 3851 3852 res = 0; 3853 while ((cmd = next_cmd(&buf))) { 3854 if (strlencmp(cmd, "enable") == 0) { 3855 hotkey_enabledisable_warn(1); 3856 } else if (strlencmp(cmd, "disable") == 0) { 3857 hotkey_enabledisable_warn(0); 3858 res = -EPERM; 3859 } else if (strlencmp(cmd, "reset") == 0) { 3860 mask = (hotkey_all_mask | hotkey_source_mask) 3861 & ~hotkey_reserved_mask; 3862 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 3863 /* mask set */ 3864 } else if (sscanf(cmd, "%x", &mask) == 1) { 3865 /* mask set */ 3866 } else { 3867 res = -EINVAL; 3868 goto errexit; 3869 } 3870 } 3871 3872 if (!res) { 3873 tpacpi_disclose_usertask("procfs hotkey", 3874 "set mask to 0x%08x\n", mask); 3875 res = hotkey_user_mask_set(mask); 3876 } 3877 3878errexit: 3879 mutex_unlock(&hotkey_mutex); 3880 return res; 3881} 3882 3883static const struct acpi_device_id ibm_htk_device_ids[] = { 3884 {TPACPI_ACPI_HKEY_HID, 0}, 3885 {"", 0}, 3886}; 3887 3888static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 3889 .hid = ibm_htk_device_ids, 3890 .notify = hotkey_notify, 3891 .handle = &hkey_handle, 3892 .type = ACPI_DEVICE_NOTIFY, 3893}; 3894 3895static struct ibm_struct hotkey_driver_data = { 3896 .name = "hotkey", 3897 .read = hotkey_read, 3898 .write = hotkey_write, 3899 .exit = hotkey_exit, 3900 .resume = hotkey_resume, 3901 .suspend = hotkey_suspend, 3902 .acpi = &ibm_hotkey_acpidriver, 3903}; 3904 3905/************************************************************************* 3906 * Bluetooth subdriver 3907 */ 3908 3909enum { 3910 /* ACPI GBDC/SBDC bits */ 3911 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 3912 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 3913 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 3914 0 = disable, 1 = enable */ 3915}; 3916 3917enum { 3918 /* ACPI \BLTH commands */ 3919 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 3920 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 3921 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 3922 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 3923 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 3924}; 3925 3926#define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 3927 3928static int bluetooth_get_status(void) 3929{ 3930 int status; 3931 3932#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3933 if (dbg_bluetoothemul) 3934 return (tpacpi_bluetooth_emulstate) ? 3935 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3936#endif 3937 3938 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 3939 return -EIO; 3940 3941 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 3942 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3943} 3944 3945static int bluetooth_set_status(enum tpacpi_rfkill_state state) 3946{ 3947 int status; 3948 3949 vdbg_printk(TPACPI_DBG_RFKILL, 3950 "will attempt to %s bluetooth\n", 3951 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 3952 3953#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3954 if (dbg_bluetoothemul) { 3955 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 3956 return 0; 3957 } 3958#endif 3959 3960 if (state == TPACPI_RFK_RADIO_ON) 3961 status = TP_ACPI_BLUETOOTH_RADIOSSW 3962 | TP_ACPI_BLUETOOTH_RESUMECTRL; 3963 else 3964 status = 0; 3965 3966 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 3967 return -EIO; 3968 3969 return 0; 3970} 3971 3972/* sysfs bluetooth enable ---------------------------------------------- */ 3973static ssize_t bluetooth_enable_show(struct device *dev, 3974 struct device_attribute *attr, 3975 char *buf) 3976{ 3977 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 3978 attr, buf); 3979} 3980 3981static ssize_t bluetooth_enable_store(struct device *dev, 3982 struct device_attribute *attr, 3983 const char *buf, size_t count) 3984{ 3985 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 3986 attr, buf, count); 3987} 3988 3989static struct device_attribute dev_attr_bluetooth_enable = 3990 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO, 3991 bluetooth_enable_show, bluetooth_enable_store); 3992 3993/* --------------------------------------------------------------------- */ 3994 3995static struct attribute *bluetooth_attributes[] = { 3996 &dev_attr_bluetooth_enable.attr, 3997 NULL 3998}; 3999 4000static const struct attribute_group bluetooth_attr_group = { 4001 .attrs = bluetooth_attributes, 4002}; 4003 4004static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4005 .get_status = bluetooth_get_status, 4006 .set_status = bluetooth_set_status, 4007}; 4008 4009static void bluetooth_shutdown(void) 4010{ 4011 /* Order firmware to save current state to NVRAM */ 4012 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4013 TP_ACPI_BLTH_SAVE_STATE)) 4014 printk(TPACPI_NOTICE 4015 "failed to save bluetooth state to NVRAM\n"); 4016 else 4017 vdbg_printk(TPACPI_DBG_RFKILL, 4018 "bluestooth state saved to NVRAM\n"); 4019} 4020 4021static void bluetooth_exit(void) 4022{ 4023 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4024 &bluetooth_attr_group); 4025 4026 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4027 4028 bluetooth_shutdown(); 4029} 4030 4031static int __init bluetooth_init(struct ibm_init_struct *iibm) 4032{ 4033 int res; 4034 int status = 0; 4035 4036 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4037 "initializing bluetooth subdriver\n"); 4038 4039 TPACPI_ACPIHANDLE_INIT(hkey); 4040 4041 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4042 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4043 tp_features.bluetooth = hkey_handle && 4044 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4045 4046 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4047 "bluetooth is %s, status 0x%02x\n", 4048 str_supported(tp_features.bluetooth), 4049 status); 4050 4051#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4052 if (dbg_bluetoothemul) { 4053 tp_features.bluetooth = 1; 4054 printk(TPACPI_INFO 4055 "bluetooth switch emulation enabled\n"); 4056 } else 4057#endif 4058 if (tp_features.bluetooth && 4059 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4060 /* no bluetooth hardware present in system */ 4061 tp_features.bluetooth = 0; 4062 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4063 "bluetooth hardware not installed\n"); 4064 } 4065 4066 if (!tp_features.bluetooth) 4067 return 1; 4068 4069 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4070 &bluetooth_tprfk_ops, 4071 RFKILL_TYPE_BLUETOOTH, 4072 TPACPI_RFK_BLUETOOTH_SW_NAME, 4073 true); 4074 if (res) 4075 return res; 4076 4077 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4078 &bluetooth_attr_group); 4079 if (res) { 4080 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4081 return res; 4082 } 4083 4084 return 0; 4085} 4086 4087/* procfs -------------------------------------------------------------- */ 4088static int bluetooth_read(struct seq_file *m) 4089{ 4090 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4091} 4092 4093static int bluetooth_write(char *buf) 4094{ 4095 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4096} 4097 4098static struct ibm_struct bluetooth_driver_data = { 4099 .name = "bluetooth", 4100 .read = bluetooth_read, 4101 .write = bluetooth_write, 4102 .exit = bluetooth_exit, 4103 .shutdown = bluetooth_shutdown, 4104}; 4105 4106/************************************************************************* 4107 * Wan subdriver 4108 */ 4109 4110enum { 4111 /* ACPI GWAN/SWAN bits */ 4112 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4113 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4114 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4115 0 = disable, 1 = enable */ 4116}; 4117 4118#define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4119 4120static int wan_get_status(void) 4121{ 4122 int status; 4123 4124#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4125 if (dbg_wwanemul) 4126 return (tpacpi_wwan_emulstate) ? 4127 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4128#endif 4129 4130 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4131 return -EIO; 4132 4133 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4134 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4135} 4136 4137static int wan_set_status(enum tpacpi_rfkill_state state) 4138{ 4139 int status; 4140 4141 vdbg_printk(TPACPI_DBG_RFKILL, 4142 "will attempt to %s wwan\n", 4143 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4144 4145#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4146 if (dbg_wwanemul) { 4147 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4148 return 0; 4149 } 4150#endif 4151 4152 if (state == TPACPI_RFK_RADIO_ON) 4153 status = TP_ACPI_WANCARD_RADIOSSW 4154 | TP_ACPI_WANCARD_RESUMECTRL; 4155 else 4156 status = 0; 4157 4158 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4159 return -EIO; 4160 4161 return 0; 4162} 4163 4164/* sysfs wan enable ---------------------------------------------------- */ 4165static ssize_t wan_enable_show(struct device *dev, 4166 struct device_attribute *attr, 4167 char *buf) 4168{ 4169 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4170 attr, buf); 4171} 4172 4173static ssize_t wan_enable_store(struct device *dev, 4174 struct device_attribute *attr, 4175 const char *buf, size_t count) 4176{ 4177 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4178 attr, buf, count); 4179} 4180 4181static struct device_attribute dev_attr_wan_enable = 4182 __ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4183 wan_enable_show, wan_enable_store); 4184 4185/* --------------------------------------------------------------------- */ 4186 4187static struct attribute *wan_attributes[] = { 4188 &dev_attr_wan_enable.attr, 4189 NULL 4190}; 4191 4192static const struct attribute_group wan_attr_group = { 4193 .attrs = wan_attributes, 4194}; 4195 4196static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4197 .get_status = wan_get_status, 4198 .set_status = wan_set_status, 4199}; 4200 4201static void wan_shutdown(void) 4202{ 4203 /* Order firmware to save current state to NVRAM */ 4204 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4205 TP_ACPI_WGSV_SAVE_STATE)) 4206 printk(TPACPI_NOTICE 4207 "failed to save WWAN state to NVRAM\n"); 4208 else 4209 vdbg_printk(TPACPI_DBG_RFKILL, 4210 "WWAN state saved to NVRAM\n"); 4211} 4212 4213static void wan_exit(void) 4214{ 4215 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4216 &wan_attr_group); 4217 4218 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4219 4220 wan_shutdown(); 4221} 4222 4223static int __init wan_init(struct ibm_init_struct *iibm) 4224{ 4225 int res; 4226 int status = 0; 4227 4228 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4229 "initializing wan subdriver\n"); 4230 4231 TPACPI_ACPIHANDLE_INIT(hkey); 4232 4233 tp_features.wan = hkey_handle && 4234 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4235 4236 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4237 "wan is %s, status 0x%02x\n", 4238 str_supported(tp_features.wan), 4239 status); 4240 4241#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4242 if (dbg_wwanemul) { 4243 tp_features.wan = 1; 4244 printk(TPACPI_INFO 4245 "wwan switch emulation enabled\n"); 4246 } else 4247#endif 4248 if (tp_features.wan && 4249 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4250 /* no wan hardware present in system */ 4251 tp_features.wan = 0; 4252 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4253 "wan hardware not installed\n"); 4254 } 4255 4256 if (!tp_features.wan) 4257 return 1; 4258 4259 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4260 &wan_tprfk_ops, 4261 RFKILL_TYPE_WWAN, 4262 TPACPI_RFK_WWAN_SW_NAME, 4263 true); 4264 if (res) 4265 return res; 4266 4267 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4268 &wan_attr_group); 4269 4270 if (res) { 4271 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4272 return res; 4273 } 4274 4275 return 0; 4276} 4277 4278/* procfs -------------------------------------------------------------- */ 4279static int wan_read(struct seq_file *m) 4280{ 4281 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4282} 4283 4284static int wan_write(char *buf) 4285{ 4286 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4287} 4288 4289static struct ibm_struct wan_driver_data = { 4290 .name = "wan", 4291 .read = wan_read, 4292 .write = wan_write, 4293 .exit = wan_exit, 4294 .shutdown = wan_shutdown, 4295}; 4296 4297/************************************************************************* 4298 * UWB subdriver 4299 */ 4300 4301enum { 4302 /* ACPI GUWB/SUWB bits */ 4303 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4304 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4305}; 4306 4307#define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4308 4309static int uwb_get_status(void) 4310{ 4311 int status; 4312 4313#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4314 if (dbg_uwbemul) 4315 return (tpacpi_uwb_emulstate) ? 4316 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4317#endif 4318 4319 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4320 return -EIO; 4321 4322 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4323 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4324} 4325 4326static int uwb_set_status(enum tpacpi_rfkill_state state) 4327{ 4328 int status; 4329 4330 vdbg_printk(TPACPI_DBG_RFKILL, 4331 "will attempt to %s UWB\n", 4332 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4333 4334#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4335 if (dbg_uwbemul) { 4336 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4337 return 0; 4338 } 4339#endif 4340 4341 if (state == TPACPI_RFK_RADIO_ON) 4342 status = TP_ACPI_UWB_RADIOSSW; 4343 else 4344 status = 0; 4345 4346 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4347 return -EIO; 4348 4349 return 0; 4350} 4351 4352/* --------------------------------------------------------------------- */ 4353 4354static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4355 .get_status = uwb_get_status, 4356 .set_status = uwb_set_status, 4357}; 4358 4359static void uwb_exit(void) 4360{ 4361 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4362} 4363 4364static int __init uwb_init(struct ibm_init_struct *iibm) 4365{ 4366 int res; 4367 int status = 0; 4368 4369 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4370 "initializing uwb subdriver\n"); 4371 4372 TPACPI_ACPIHANDLE_INIT(hkey); 4373 4374 tp_features.uwb = hkey_handle && 4375 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4376 4377 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4378 "uwb is %s, status 0x%02x\n", 4379 str_supported(tp_features.uwb), 4380 status); 4381 4382#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4383 if (dbg_uwbemul) { 4384 tp_features.uwb = 1; 4385 printk(TPACPI_INFO 4386 "uwb switch emulation enabled\n"); 4387 } else 4388#endif 4389 if (tp_features.uwb && 4390 !(status & TP_ACPI_UWB_HWPRESENT)) { 4391 /* no uwb hardware present in system */ 4392 tp_features.uwb = 0; 4393 dbg_printk(TPACPI_DBG_INIT, 4394 "uwb hardware not installed\n"); 4395 } 4396 4397 if (!tp_features.uwb) 4398 return 1; 4399 4400 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4401 &uwb_tprfk_ops, 4402 RFKILL_TYPE_UWB, 4403 TPACPI_RFK_UWB_SW_NAME, 4404 false); 4405 return res; 4406} 4407 4408static struct ibm_struct uwb_driver_data = { 4409 .name = "uwb", 4410 .exit = uwb_exit, 4411 .flags.experimental = 1, 4412}; 4413 4414/************************************************************************* 4415 * Video subdriver 4416 */ 4417 4418#ifdef CONFIG_THINKPAD_ACPI_VIDEO 4419 4420enum video_access_mode { 4421 TPACPI_VIDEO_NONE = 0, 4422 TPACPI_VIDEO_570, /* 570 */ 4423 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4424 TPACPI_VIDEO_NEW, /* all others */ 4425}; 4426 4427enum { /* video status flags, based on VIDEO_570 */ 4428 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4429 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4430 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4431}; 4432 4433enum { /* TPACPI_VIDEO_570 constants */ 4434 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4435 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4436 * video_status_flags */ 4437 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4438 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4439}; 4440 4441static enum video_access_mode video_supported; 4442static int video_orig_autosw; 4443 4444static int video_autosw_get(void); 4445static int video_autosw_set(int enable); 4446 4447TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4448 4449static int __init video_init(struct ibm_init_struct *iibm) 4450{ 4451 int ivga; 4452 4453 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4454 4455 TPACPI_ACPIHANDLE_INIT(vid); 4456 if (tpacpi_is_ibm()) 4457 TPACPI_ACPIHANDLE_INIT(vid2); 4458 4459 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4460 /* G41, assume IVGA doesn't change */ 4461 vid_handle = vid2_handle; 4462 4463 if (!vid_handle) 4464 /* video switching not supported on R30, R31 */ 4465 video_supported = TPACPI_VIDEO_NONE; 4466 else if (tpacpi_is_ibm() && 4467 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4468 /* 570 */ 4469 video_supported = TPACPI_VIDEO_570; 4470 else if (tpacpi_is_ibm() && 4471 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4472 /* 600e/x, 770e, 770x */ 4473 video_supported = TPACPI_VIDEO_770; 4474 else 4475 /* all others */ 4476 video_supported = TPACPI_VIDEO_NEW; 4477 4478 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4479 str_supported(video_supported != TPACPI_VIDEO_NONE), 4480 video_supported); 4481 4482 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1; 4483} 4484 4485static void video_exit(void) 4486{ 4487 dbg_printk(TPACPI_DBG_EXIT, 4488 "restoring original video autoswitch mode\n"); 4489 if (video_autosw_set(video_orig_autosw)) 4490 printk(TPACPI_ERR "error while trying to restore original " 4491 "video autoswitch mode\n"); 4492} 4493 4494static int video_outputsw_get(void) 4495{ 4496 int status = 0; 4497 int i; 4498 4499 switch (video_supported) { 4500 case TPACPI_VIDEO_570: 4501 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4502 TP_ACPI_VIDEO_570_PHSCMD)) 4503 return -EIO; 4504 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4505 break; 4506 case TPACPI_VIDEO_770: 4507 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4508 return -EIO; 4509 if (i) 4510 status |= TP_ACPI_VIDEO_S_LCD; 4511 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4512 return -EIO; 4513 if (i) 4514 status |= TP_ACPI_VIDEO_S_CRT; 4515 break; 4516 case TPACPI_VIDEO_NEW: 4517 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4518 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4519 return -EIO; 4520 if (i) 4521 status |= TP_ACPI_VIDEO_S_CRT; 4522 4523 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4524 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4525 return -EIO; 4526 if (i) 4527 status |= TP_ACPI_VIDEO_S_LCD; 4528 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4529 return -EIO; 4530 if (i) 4531 status |= TP_ACPI_VIDEO_S_DVI; 4532 break; 4533 default: 4534 return -ENOSYS; 4535 } 4536 4537 return status; 4538} 4539 4540static int video_outputsw_set(int status) 4541{ 4542 int autosw; 4543 int res = 0; 4544 4545 switch (video_supported) { 4546 case TPACPI_VIDEO_570: 4547 res = acpi_evalf(NULL, NULL, 4548 "\\_SB.PHS2", "vdd", 4549 TP_ACPI_VIDEO_570_PHS2CMD, 4550 status | TP_ACPI_VIDEO_570_PHS2SET); 4551 break; 4552 case TPACPI_VIDEO_770: 4553 autosw = video_autosw_get(); 4554 if (autosw < 0) 4555 return autosw; 4556 4557 res = video_autosw_set(1); 4558 if (res) 4559 return res; 4560 res = acpi_evalf(vid_handle, NULL, 4561 "ASWT", "vdd", status * 0x100, 0); 4562 if (!autosw && video_autosw_set(autosw)) { 4563 printk(TPACPI_ERR 4564 "video auto-switch left enabled due to error\n"); 4565 return -EIO; 4566 } 4567 break; 4568 case TPACPI_VIDEO_NEW: 4569 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4570 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4571 break; 4572 default: 4573 return -ENOSYS; 4574 } 4575 4576 return (res)? 0 : -EIO; 4577} 4578 4579static int video_autosw_get(void) 4580{ 4581 int autosw = 0; 4582 4583 switch (video_supported) { 4584 case TPACPI_VIDEO_570: 4585 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4586 return -EIO; 4587 break; 4588 case TPACPI_VIDEO_770: 4589 case TPACPI_VIDEO_NEW: 4590 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4591 return -EIO; 4592 break; 4593 default: 4594 return -ENOSYS; 4595 } 4596 4597 return autosw & 1; 4598} 4599 4600static int video_autosw_set(int enable) 4601{ 4602 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0)) 4603 return -EIO; 4604 return 0; 4605} 4606 4607static int video_outputsw_cycle(void) 4608{ 4609 int autosw = video_autosw_get(); 4610 int res; 4611 4612 if (autosw < 0) 4613 return autosw; 4614 4615 switch (video_supported) { 4616 case TPACPI_VIDEO_570: 4617 res = video_autosw_set(1); 4618 if (res) 4619 return res; 4620 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4621 break; 4622 case TPACPI_VIDEO_770: 4623 case TPACPI_VIDEO_NEW: 4624 res = video_autosw_set(1); 4625 if (res) 4626 return res; 4627 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4628 break; 4629 default: 4630 return -ENOSYS; 4631 } 4632 if (!autosw && video_autosw_set(autosw)) { 4633 printk(TPACPI_ERR 4634 "video auto-switch left enabled due to error\n"); 4635 return -EIO; 4636 } 4637 4638 return (res)? 0 : -EIO; 4639} 4640 4641static int video_expand_toggle(void) 4642{ 4643 switch (video_supported) { 4644 case TPACPI_VIDEO_570: 4645 return acpi_evalf(ec_handle, NULL, "_Q17", "v")? 4646 0 : -EIO; 4647 case TPACPI_VIDEO_770: 4648 return acpi_evalf(vid_handle, NULL, "VEXP", "v")? 4649 0 : -EIO; 4650 case TPACPI_VIDEO_NEW: 4651 return acpi_evalf(NULL, NULL, "\\VEXP", "v")? 4652 0 : -EIO; 4653 default: 4654 return -ENOSYS; 4655 } 4656 /* not reached */ 4657} 4658 4659static int video_read(struct seq_file *m) 4660{ 4661 int status, autosw; 4662 4663 if (video_supported == TPACPI_VIDEO_NONE) { 4664 seq_printf(m, "status:\t\tnot supported\n"); 4665 return 0; 4666 } 4667 4668 /* Even reads can crash X.org, so... */ 4669 if (!capable(CAP_SYS_ADMIN)) 4670 return -EPERM; 4671 4672 status = video_outputsw_get(); 4673 if (status < 0) 4674 return status; 4675 4676 autosw = video_autosw_get(); 4677 if (autosw < 0) 4678 return autosw; 4679 4680 seq_printf(m, "status:\t\tsupported\n"); 4681 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4682 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4683 if (video_supported == TPACPI_VIDEO_NEW) 4684 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 4685 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 4686 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 4687 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 4688 if (video_supported == TPACPI_VIDEO_NEW) 4689 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 4690 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 4691 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 4692 4693 return 0; 4694} 4695 4696static int video_write(char *buf) 4697{ 4698 char *cmd; 4699 int enable, disable, status; 4700 int res; 4701 4702 if (video_supported == TPACPI_VIDEO_NONE) 4703 return -ENODEV; 4704 4705 /* Even reads can crash X.org, let alone writes... */ 4706 if (!capable(CAP_SYS_ADMIN)) 4707 return -EPERM; 4708 4709 enable = 0; 4710 disable = 0; 4711 4712 while ((cmd = next_cmd(&buf))) { 4713 if (strlencmp(cmd, "lcd_enable") == 0) { 4714 enable |= TP_ACPI_VIDEO_S_LCD; 4715 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4716 disable |= TP_ACPI_VIDEO_S_LCD; 4717 } else if (strlencmp(cmd, "crt_enable") == 0) { 4718 enable |= TP_ACPI_VIDEO_S_CRT; 4719 } else if (strlencmp(cmd, "crt_disable") == 0) { 4720 disable |= TP_ACPI_VIDEO_S_CRT; 4721 } else if (video_supported == TPACPI_VIDEO_NEW && 4722 strlencmp(cmd, "dvi_enable") == 0) { 4723 enable |= TP_ACPI_VIDEO_S_DVI; 4724 } else if (video_supported == TPACPI_VIDEO_NEW && 4725 strlencmp(cmd, "dvi_disable") == 0) { 4726 disable |= TP_ACPI_VIDEO_S_DVI; 4727 } else if (strlencmp(cmd, "auto_enable") == 0) { 4728 res = video_autosw_set(1); 4729 if (res) 4730 return res; 4731 } else if (strlencmp(cmd, "auto_disable") == 0) { 4732 res = video_autosw_set(0); 4733 if (res) 4734 return res; 4735 } else if (strlencmp(cmd, "video_switch") == 0) { 4736 res = video_outputsw_cycle(); 4737 if (res) 4738 return res; 4739 } else if (strlencmp(cmd, "expand_toggle") == 0) { 4740 res = video_expand_toggle(); 4741 if (res) 4742 return res; 4743 } else 4744 return -EINVAL; 4745 } 4746 4747 if (enable || disable) { 4748 status = video_outputsw_get(); 4749 if (status < 0) 4750 return status; 4751 res = video_outputsw_set((status & ~disable) | enable); 4752 if (res) 4753 return res; 4754 } 4755 4756 return 0; 4757} 4758 4759static struct ibm_struct video_driver_data = { 4760 .name = "video", 4761 .read = video_read, 4762 .write = video_write, 4763 .exit = video_exit, 4764}; 4765 4766#endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 4767 4768/************************************************************************* 4769 * Light (thinklight) subdriver 4770 */ 4771 4772TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 4773TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 4774 4775static int light_get_status(void) 4776{ 4777 int status = 0; 4778 4779 if (tp_features.light_status) { 4780 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 4781 return -EIO; 4782 return (!!status); 4783 } 4784 4785 return -ENXIO; 4786} 4787 4788static int light_set_status(int status) 4789{ 4790 int rc; 4791 4792 if (tp_features.light) { 4793 if (cmos_handle) { 4794 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 4795 (status)? 4796 TP_CMOS_THINKLIGHT_ON : 4797 TP_CMOS_THINKLIGHT_OFF); 4798 } else { 4799 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 4800 (status)? 1 : 0); 4801 } 4802 return (rc)? 0 : -EIO; 4803 } 4804 4805 return -ENXIO; 4806} 4807 4808static void light_set_status_worker(struct work_struct *work) 4809{ 4810 struct tpacpi_led_classdev *data = 4811 container_of(work, struct tpacpi_led_classdev, work); 4812 4813 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 4814 light_set_status((data->new_state != TPACPI_LED_OFF)); 4815} 4816 4817static void light_sysfs_set(struct led_classdev *led_cdev, 4818 enum led_brightness brightness) 4819{ 4820 struct tpacpi_led_classdev *data = 4821 container_of(led_cdev, 4822 struct tpacpi_led_classdev, 4823 led_classdev); 4824 data->new_state = (brightness != LED_OFF) ? 4825 TPACPI_LED_ON : TPACPI_LED_OFF; 4826 queue_work(tpacpi_wq, &data->work); 4827} 4828 4829static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 4830{ 4831 return (light_get_status() == 1)? LED_FULL : LED_OFF; 4832} 4833 4834static struct tpacpi_led_classdev tpacpi_led_thinklight = { 4835 .led_classdev = { 4836 .name = "tpacpi::thinklight", 4837 .brightness_set = &light_sysfs_set, 4838 .brightness_get = &light_sysfs_get, 4839 } 4840}; 4841 4842static int __init light_init(struct ibm_init_struct *iibm) 4843{ 4844 int rc; 4845 4846 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 4847 4848 if (tpacpi_is_ibm()) { 4849 TPACPI_ACPIHANDLE_INIT(ledb); 4850 TPACPI_ACPIHANDLE_INIT(lght); 4851 } 4852 TPACPI_ACPIHANDLE_INIT(cmos); 4853 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 4854 4855 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 4856 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 4857 4858 if (tp_features.light) 4859 /* light status not supported on 4860 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 4861 tp_features.light_status = 4862 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 4863 4864 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 4865 str_supported(tp_features.light), 4866 str_supported(tp_features.light_status)); 4867 4868 if (!tp_features.light) 4869 return 1; 4870 4871 rc = led_classdev_register(&tpacpi_pdev->dev, 4872 &tpacpi_led_thinklight.led_classdev); 4873 4874 if (rc < 0) { 4875 tp_features.light = 0; 4876 tp_features.light_status = 0; 4877 } else { 4878 rc = 0; 4879 } 4880 4881 return rc; 4882} 4883 4884static void light_exit(void) 4885{ 4886 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 4887 if (work_pending(&tpacpi_led_thinklight.work)) 4888 flush_workqueue(tpacpi_wq); 4889} 4890 4891static int light_read(struct seq_file *m) 4892{ 4893 int status; 4894 4895 if (!tp_features.light) { 4896 seq_printf(m, "status:\t\tnot supported\n"); 4897 } else if (!tp_features.light_status) { 4898 seq_printf(m, "status:\t\tunknown\n"); 4899 seq_printf(m, "commands:\ton, off\n"); 4900 } else { 4901 status = light_get_status(); 4902 if (status < 0) 4903 return status; 4904 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 4905 seq_printf(m, "commands:\ton, off\n"); 4906 } 4907 4908 return 0; 4909} 4910 4911static int light_write(char *buf) 4912{ 4913 char *cmd; 4914 int newstatus = 0; 4915 4916 if (!tp_features.light) 4917 return -ENODEV; 4918 4919 while ((cmd = next_cmd(&buf))) { 4920 if (strlencmp(cmd, "on") == 0) { 4921 newstatus = 1; 4922 } else if (strlencmp(cmd, "off") == 0) { 4923 newstatus = 0; 4924 } else 4925 return -EINVAL; 4926 } 4927 4928 return light_set_status(newstatus); 4929} 4930 4931static struct ibm_struct light_driver_data = { 4932 .name = "light", 4933 .read = light_read, 4934 .write = light_write, 4935 .exit = light_exit, 4936}; 4937 4938/************************************************************************* 4939 * CMOS subdriver 4940 */ 4941 4942/* sysfs cmos_command -------------------------------------------------- */ 4943static ssize_t cmos_command_store(struct device *dev, 4944 struct device_attribute *attr, 4945 const char *buf, size_t count) 4946{ 4947 unsigned long cmos_cmd; 4948 int res; 4949 4950 if (parse_strtoul(buf, 21, &cmos_cmd)) 4951 return -EINVAL; 4952 4953 res = issue_thinkpad_cmos_command(cmos_cmd); 4954 return (res)? res : count; 4955} 4956 4957static struct device_attribute dev_attr_cmos_command = 4958 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store); 4959 4960/* --------------------------------------------------------------------- */ 4961 4962static int __init cmos_init(struct ibm_init_struct *iibm) 4963{ 4964 int res; 4965 4966 vdbg_printk(TPACPI_DBG_INIT, 4967 "initializing cmos commands subdriver\n"); 4968 4969 TPACPI_ACPIHANDLE_INIT(cmos); 4970 4971 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 4972 str_supported(cmos_handle != NULL)); 4973 4974 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4975 if (res) 4976 return res; 4977 4978 return (cmos_handle)? 0 : 1; 4979} 4980 4981static void cmos_exit(void) 4982{ 4983 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4984} 4985 4986static int cmos_read(struct seq_file *m) 4987{ 4988 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4989 R30, R31, T20-22, X20-21 */ 4990 if (!cmos_handle) 4991 seq_printf(m, "status:\t\tnot supported\n"); 4992 else { 4993 seq_printf(m, "status:\t\tsupported\n"); 4994 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 4995 } 4996 4997 return 0; 4998} 4999 5000static int cmos_write(char *buf) 5001{ 5002 char *cmd; 5003 int cmos_cmd, res; 5004 5005 while ((cmd = next_cmd(&buf))) { 5006 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5007 cmos_cmd >= 0 && cmos_cmd <= 21) { 5008 /* cmos_cmd set */ 5009 } else 5010 return -EINVAL; 5011 5012 res = issue_thinkpad_cmos_command(cmos_cmd); 5013 if (res) 5014 return res; 5015 } 5016 5017 return 0; 5018} 5019 5020static struct ibm_struct cmos_driver_data = { 5021 .name = "cmos", 5022 .read = cmos_read, 5023 .write = cmos_write, 5024 .exit = cmos_exit, 5025}; 5026 5027/************************************************************************* 5028 * LED subdriver 5029 */ 5030 5031enum led_access_mode { 5032 TPACPI_LED_NONE = 0, 5033 TPACPI_LED_570, /* 570 */ 5034 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5035 TPACPI_LED_NEW, /* all others */ 5036}; 5037 5038enum { /* For TPACPI_LED_OLD */ 5039 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5040 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5041 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5042}; 5043 5044static enum led_access_mode led_supported; 5045 5046static acpi_handle led_handle; 5047 5048#define TPACPI_LED_NUMLEDS 16 5049static struct tpacpi_led_classdev *tpacpi_leds; 5050static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5051static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5052 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5053 "tpacpi::power", 5054 "tpacpi:orange:batt", 5055 "tpacpi:green:batt", 5056 "tpacpi::dock_active", 5057 "tpacpi::bay_active", 5058 "tpacpi::dock_batt", 5059 "tpacpi::unknown_led", 5060 "tpacpi::standby", 5061 "tpacpi::dock_status1", 5062 "tpacpi::dock_status2", 5063 "tpacpi::unknown_led2", 5064 "tpacpi::unknown_led3", 5065 "tpacpi::thinkvantage", 5066}; 5067#define TPACPI_SAFE_LEDS 0x1081U 5068 5069static inline bool tpacpi_is_led_restricted(const unsigned int led) 5070{ 5071#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5072 return false; 5073#else 5074 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5075#endif 5076} 5077 5078static int led_get_status(const unsigned int led) 5079{ 5080 int status; 5081 enum led_status_t led_s; 5082 5083 switch (led_supported) { 5084 case TPACPI_LED_570: 5085 if (!acpi_evalf(ec_handle, 5086 &status, "GLED", "dd", 1 << led)) 5087 return -EIO; 5088 led_s = (status == 0)? 5089 TPACPI_LED_OFF : 5090 ((status == 1)? 5091 TPACPI_LED_ON : 5092 TPACPI_LED_BLINK); 5093 tpacpi_led_state_cache[led] = led_s; 5094 return led_s; 5095 default: 5096 return -ENXIO; 5097 } 5098 5099 /* not reached */ 5100} 5101 5102static int led_set_status(const unsigned int led, 5103 const enum led_status_t ledstatus) 5104{ 5105 /* off, on, blink. Index is led_status_t */ 5106 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5107 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5108 5109 int rc = 0; 5110 5111 switch (led_supported) { 5112 case TPACPI_LED_570: 5113 /* 570 */ 5114 if (unlikely(led > 7)) 5115 return -EINVAL; 5116 if (unlikely(tpacpi_is_led_restricted(led))) 5117 return -EPERM; 5118 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5119 (1 << led), led_sled_arg1[ledstatus])) 5120 rc = -EIO; 5121 break; 5122 case TPACPI_LED_OLD: 5123 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5124 if (unlikely(led > 7)) 5125 return -EINVAL; 5126 if (unlikely(tpacpi_is_led_restricted(led))) 5127 return -EPERM; 5128 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5129 if (rc >= 0) 5130 rc = ec_write(TPACPI_LED_EC_HLBL, 5131 (ledstatus == TPACPI_LED_BLINK) << led); 5132 if (rc >= 0) 5133 rc = ec_write(TPACPI_LED_EC_HLCL, 5134 (ledstatus != TPACPI_LED_OFF) << led); 5135 break; 5136 case TPACPI_LED_NEW: 5137 /* all others */ 5138 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5139 return -EINVAL; 5140 if (unlikely(tpacpi_is_led_restricted(led))) 5141 return -EPERM; 5142 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5143 led, led_led_arg1[ledstatus])) 5144 rc = -EIO; 5145 break; 5146 default: 5147 rc = -ENXIO; 5148 } 5149 5150 if (!rc) 5151 tpacpi_led_state_cache[led] = ledstatus; 5152 5153 return rc; 5154} 5155 5156static void led_set_status_worker(struct work_struct *work) 5157{ 5158 struct tpacpi_led_classdev *data = 5159 container_of(work, struct tpacpi_led_classdev, work); 5160 5161 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5162 led_set_status(data->led, data->new_state); 5163} 5164 5165static void led_sysfs_set(struct led_classdev *led_cdev, 5166 enum led_brightness brightness) 5167{ 5168 struct tpacpi_led_classdev *data = container_of(led_cdev, 5169 struct tpacpi_led_classdev, led_classdev); 5170 5171 if (brightness == LED_OFF) 5172 data->new_state = TPACPI_LED_OFF; 5173 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5174 data->new_state = TPACPI_LED_ON; 5175 else 5176 data->new_state = TPACPI_LED_BLINK; 5177 5178 queue_work(tpacpi_wq, &data->work); 5179} 5180 5181static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5182 unsigned long *delay_on, unsigned long *delay_off) 5183{ 5184 struct tpacpi_led_classdev *data = container_of(led_cdev, 5185 struct tpacpi_led_classdev, led_classdev); 5186 5187 /* Can we choose the flash rate? */ 5188 if (*delay_on == 0 && *delay_off == 0) { 5189 /* yes. set them to the hardware blink rate (1 Hz) */ 5190 *delay_on = 500; /* ms */ 5191 *delay_off = 500; /* ms */ 5192 } else if ((*delay_on != 500) || (*delay_off != 500)) 5193 return -EINVAL; 5194 5195 data->new_state = TPACPI_LED_BLINK; 5196 queue_work(tpacpi_wq, &data->work); 5197 5198 return 0; 5199} 5200 5201static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5202{ 5203 int rc; 5204 5205 struct tpacpi_led_classdev *data = container_of(led_cdev, 5206 struct tpacpi_led_classdev, led_classdev); 5207 5208 rc = led_get_status(data->led); 5209 5210 if (rc == TPACPI_LED_OFF || rc < 0) 5211 rc = LED_OFF; /* no error handling in led class :( */ 5212 else 5213 rc = LED_FULL; 5214 5215 return rc; 5216} 5217 5218static void led_exit(void) 5219{ 5220 unsigned int i; 5221 5222 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5223 if (tpacpi_leds[i].led_classdev.name) 5224 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5225 } 5226 5227 kfree(tpacpi_leds); 5228} 5229 5230static int __init tpacpi_init_led(unsigned int led) 5231{ 5232 int rc; 5233 5234 tpacpi_leds[led].led = led; 5235 5236 /* LEDs with no name don't get registered */ 5237 if (!tpacpi_led_names[led]) 5238 return 0; 5239 5240 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5241 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5242 if (led_supported == TPACPI_LED_570) 5243 tpacpi_leds[led].led_classdev.brightness_get = 5244 &led_sysfs_get; 5245 5246 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5247 5248 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5249 5250 rc = led_classdev_register(&tpacpi_pdev->dev, 5251 &tpacpi_leds[led].led_classdev); 5252 if (rc < 0) 5253 tpacpi_leds[led].led_classdev.name = NULL; 5254 5255 return rc; 5256} 5257 5258static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5259 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5260 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5261 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5262 5263 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5264 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5265 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5266 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5267 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5268 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5269 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5270 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5271 5272 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5273 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5274 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5275 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5276 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5277 5278 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5279 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5280 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5281 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5282 5283 /* (1) - may have excess leds enabled on MSB */ 5284 5285 /* Defaults (order matters, keep last, don't reorder!) */ 5286 { /* Lenovo */ 5287 .vendor = PCI_VENDOR_ID_LENOVO, 5288 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5289 .quirks = 0x1fffU, 5290 }, 5291 { /* IBM ThinkPads with no EC version string */ 5292 .vendor = PCI_VENDOR_ID_IBM, 5293 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5294 .quirks = 0x00ffU, 5295 }, 5296 { /* IBM ThinkPads with EC version string */ 5297 .vendor = PCI_VENDOR_ID_IBM, 5298 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5299 .quirks = 0x00bfU, 5300 }, 5301}; 5302 5303#undef TPACPI_LEDQ_IBM 5304#undef TPACPI_LEDQ_LNV 5305 5306static enum led_access_mode __init led_init_detect_mode(void) 5307{ 5308 acpi_status status; 5309 5310 if (tpacpi_is_ibm()) { 5311 /* 570 */ 5312 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5313 if (ACPI_SUCCESS(status)) 5314 return TPACPI_LED_570; 5315 5316 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5317 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5318 if (ACPI_SUCCESS(status)) 5319 return TPACPI_LED_OLD; 5320 } 5321 5322 /* most others */ 5323 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5324 if (ACPI_SUCCESS(status)) 5325 return TPACPI_LED_NEW; 5326 5327 /* R30, R31, and unknown firmwares */ 5328 led_handle = NULL; 5329 return TPACPI_LED_NONE; 5330} 5331 5332static int __init led_init(struct ibm_init_struct *iibm) 5333{ 5334 unsigned int i; 5335 int rc; 5336 unsigned long useful_leds; 5337 5338 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5339 5340 led_supported = led_init_detect_mode(); 5341 5342 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5343 str_supported(led_supported), led_supported); 5344 5345 if (led_supported == TPACPI_LED_NONE) 5346 return 1; 5347 5348 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5349 GFP_KERNEL); 5350 if (!tpacpi_leds) { 5351 printk(TPACPI_ERR "Out of memory for LED data\n"); 5352 return -ENOMEM; 5353 } 5354 5355 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5356 ARRAY_SIZE(led_useful_qtable)); 5357 5358 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5359 if (!tpacpi_is_led_restricted(i) && 5360 test_bit(i, &useful_leds)) { 5361 rc = tpacpi_init_led(i); 5362 if (rc < 0) { 5363 led_exit(); 5364 return rc; 5365 } 5366 } 5367 } 5368 5369#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5370 printk(TPACPI_NOTICE 5371 "warning: userspace override of important " 5372 "firmware LEDs is enabled\n"); 5373#endif 5374 return 0; 5375} 5376 5377#define str_led_status(s) \ 5378 ((s) == TPACPI_LED_OFF ? "off" : \ 5379 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5380 5381static int led_read(struct seq_file *m) 5382{ 5383 if (!led_supported) { 5384 seq_printf(m, "status:\t\tnot supported\n"); 5385 return 0; 5386 } 5387 seq_printf(m, "status:\t\tsupported\n"); 5388 5389 if (led_supported == TPACPI_LED_570) { 5390 /* 570 */ 5391 int i, status; 5392 for (i = 0; i < 8; i++) { 5393 status = led_get_status(i); 5394 if (status < 0) 5395 return -EIO; 5396 seq_printf(m, "%d:\t\t%s\n", 5397 i, str_led_status(status)); 5398 } 5399 } 5400 5401 seq_printf(m, "commands:\t" 5402 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5403 5404 return 0; 5405} 5406 5407static int led_write(char *buf) 5408{ 5409 char *cmd; 5410 int led, rc; 5411 enum led_status_t s; 5412 5413 if (!led_supported) 5414 return -ENODEV; 5415 5416 while ((cmd = next_cmd(&buf))) { 5417 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15) 5418 return -EINVAL; 5419 5420 if (strstr(cmd, "off")) { 5421 s = TPACPI_LED_OFF; 5422 } else if (strstr(cmd, "on")) { 5423 s = TPACPI_LED_ON; 5424 } else if (strstr(cmd, "blink")) { 5425 s = TPACPI_LED_BLINK; 5426 } else { 5427 return -EINVAL; 5428 } 5429 5430 rc = led_set_status(led, s); 5431 if (rc < 0) 5432 return rc; 5433 } 5434 5435 return 0; 5436} 5437 5438static struct ibm_struct led_driver_data = { 5439 .name = "led", 5440 .read = led_read, 5441 .write = led_write, 5442 .exit = led_exit, 5443}; 5444 5445/************************************************************************* 5446 * Beep subdriver 5447 */ 5448 5449TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5450 5451#define TPACPI_BEEP_Q1 0x0001 5452 5453static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5454 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5455 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5456}; 5457 5458static int __init beep_init(struct ibm_init_struct *iibm) 5459{ 5460 unsigned long quirks; 5461 5462 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5463 5464 TPACPI_ACPIHANDLE_INIT(beep); 5465 5466 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5467 str_supported(beep_handle != NULL)); 5468 5469 quirks = tpacpi_check_quirks(beep_quirk_table, 5470 ARRAY_SIZE(beep_quirk_table)); 5471 5472 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5473 5474 return (beep_handle)? 0 : 1; 5475} 5476 5477static int beep_read(struct seq_file *m) 5478{ 5479 if (!beep_handle) 5480 seq_printf(m, "status:\t\tnot supported\n"); 5481 else { 5482 seq_printf(m, "status:\t\tsupported\n"); 5483 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5484 } 5485 5486 return 0; 5487} 5488 5489static int beep_write(char *buf) 5490{ 5491 char *cmd; 5492 int beep_cmd; 5493 5494 if (!beep_handle) 5495 return -ENODEV; 5496 5497 while ((cmd = next_cmd(&buf))) { 5498 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 5499 beep_cmd >= 0 && beep_cmd <= 17) { 5500 /* beep_cmd set */ 5501 } else 5502 return -EINVAL; 5503 if (tp_features.beep_needs_two_args) { 5504 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 5505 beep_cmd, 0)) 5506 return -EIO; 5507 } else { 5508 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 5509 beep_cmd)) 5510 return -EIO; 5511 } 5512 } 5513 5514 return 0; 5515} 5516 5517static struct ibm_struct beep_driver_data = { 5518 .name = "beep", 5519 .read = beep_read, 5520 .write = beep_write, 5521}; 5522 5523/************************************************************************* 5524 * Thermal subdriver 5525 */ 5526 5527enum thermal_access_mode { 5528 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 5529 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 5530 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 5531 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 5532 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 5533}; 5534 5535enum { /* TPACPI_THERMAL_TPEC_* */ 5536 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 5537 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 5538 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 5539 5540 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 5541}; 5542 5543 5544#define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 5545struct ibm_thermal_sensors_struct { 5546 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 5547}; 5548 5549static enum thermal_access_mode thermal_read_mode; 5550 5551/* idx is zero-based */ 5552static int thermal_get_sensor(int idx, s32 *value) 5553{ 5554 int t; 5555 s8 tmp; 5556 char tmpi[5]; 5557 5558 t = TP_EC_THERMAL_TMP0; 5559 5560 switch (thermal_read_mode) { 5561#if TPACPI_MAX_THERMAL_SENSORS >= 16 5562 case TPACPI_THERMAL_TPEC_16: 5563 if (idx >= 8 && idx <= 15) { 5564 t = TP_EC_THERMAL_TMP8; 5565 idx -= 8; 5566 } 5567 /* fallthrough */ 5568#endif 5569 case TPACPI_THERMAL_TPEC_8: 5570 if (idx <= 7) { 5571 if (!acpi_ec_read(t + idx, &tmp)) 5572 return -EIO; 5573 *value = tmp * 1000; 5574 return 0; 5575 } 5576 break; 5577 5578 case TPACPI_THERMAL_ACPI_UPDT: 5579 if (idx <= 7) { 5580 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5581 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 5582 return -EIO; 5583 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5584 return -EIO; 5585 *value = (t - 2732) * 100; 5586 return 0; 5587 } 5588 break; 5589 5590 case TPACPI_THERMAL_ACPI_TMP07: 5591 if (idx <= 7) { 5592 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5593 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5594 return -EIO; 5595 if (t > 127 || t < -127) 5596 t = TP_EC_THERMAL_TMP_NA; 5597 *value = t * 1000; 5598 return 0; 5599 } 5600 break; 5601 5602 case TPACPI_THERMAL_NONE: 5603 default: 5604 return -ENOSYS; 5605 } 5606 5607 return -EINVAL; 5608} 5609 5610static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 5611{ 5612 int res, i; 5613 int n; 5614 5615 n = 8; 5616 i = 0; 5617 5618 if (!s) 5619 return -EINVAL; 5620 5621 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 5622 n = 16; 5623 5624 for (i = 0 ; i < n; i++) { 5625 res = thermal_get_sensor(i, &s->temp[i]); 5626 if (res) 5627 return res; 5628 } 5629 5630 return n; 5631} 5632 5633static void thermal_dump_all_sensors(void) 5634{ 5635 int n, i; 5636 struct ibm_thermal_sensors_struct t; 5637 5638 n = thermal_get_sensors(&t); 5639 if (n <= 0) 5640 return; 5641 5642 printk(TPACPI_NOTICE 5643 "temperatures (Celsius):"); 5644 5645 for (i = 0; i < n; i++) { 5646 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 5647 printk(KERN_CONT " %d", (int)(t.temp[i] / 1000)); 5648 else 5649 printk(KERN_CONT " N/A"); 5650 } 5651 5652 printk(KERN_CONT "\n"); 5653} 5654 5655/* sysfs temp##_input -------------------------------------------------- */ 5656 5657static ssize_t thermal_temp_input_show(struct device *dev, 5658 struct device_attribute *attr, 5659 char *buf) 5660{ 5661 struct sensor_device_attribute *sensor_attr = 5662 to_sensor_dev_attr(attr); 5663 int idx = sensor_attr->index; 5664 s32 value; 5665 int res; 5666 5667 res = thermal_get_sensor(idx, &value); 5668 if (res) 5669 return res; 5670 if (value == TPACPI_THERMAL_SENSOR_NA) 5671 return -ENXIO; 5672 5673 return snprintf(buf, PAGE_SIZE, "%d\n", value); 5674} 5675 5676#define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 5677 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 5678 thermal_temp_input_show, NULL, _idxB) 5679 5680static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 5681 THERMAL_SENSOR_ATTR_TEMP(1, 0), 5682 THERMAL_SENSOR_ATTR_TEMP(2, 1), 5683 THERMAL_SENSOR_ATTR_TEMP(3, 2), 5684 THERMAL_SENSOR_ATTR_TEMP(4, 3), 5685 THERMAL_SENSOR_ATTR_TEMP(5, 4), 5686 THERMAL_SENSOR_ATTR_TEMP(6, 5), 5687 THERMAL_SENSOR_ATTR_TEMP(7, 6), 5688 THERMAL_SENSOR_ATTR_TEMP(8, 7), 5689 THERMAL_SENSOR_ATTR_TEMP(9, 8), 5690 THERMAL_SENSOR_ATTR_TEMP(10, 9), 5691 THERMAL_SENSOR_ATTR_TEMP(11, 10), 5692 THERMAL_SENSOR_ATTR_TEMP(12, 11), 5693 THERMAL_SENSOR_ATTR_TEMP(13, 12), 5694 THERMAL_SENSOR_ATTR_TEMP(14, 13), 5695 THERMAL_SENSOR_ATTR_TEMP(15, 14), 5696 THERMAL_SENSOR_ATTR_TEMP(16, 15), 5697}; 5698 5699#define THERMAL_ATTRS(X) \ 5700 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 5701 5702static struct attribute *thermal_temp_input_attr[] = { 5703 THERMAL_ATTRS(8), 5704 THERMAL_ATTRS(9), 5705 THERMAL_ATTRS(10), 5706 THERMAL_ATTRS(11), 5707 THERMAL_ATTRS(12), 5708 THERMAL_ATTRS(13), 5709 THERMAL_ATTRS(14), 5710 THERMAL_ATTRS(15), 5711 THERMAL_ATTRS(0), 5712 THERMAL_ATTRS(1), 5713 THERMAL_ATTRS(2), 5714 THERMAL_ATTRS(3), 5715 THERMAL_ATTRS(4), 5716 THERMAL_ATTRS(5), 5717 THERMAL_ATTRS(6), 5718 THERMAL_ATTRS(7), 5719 NULL 5720}; 5721 5722static const struct attribute_group thermal_temp_input16_group = { 5723 .attrs = thermal_temp_input_attr 5724}; 5725 5726static const struct attribute_group thermal_temp_input8_group = { 5727 .attrs = &thermal_temp_input_attr[8] 5728}; 5729 5730#undef THERMAL_SENSOR_ATTR_TEMP 5731#undef THERMAL_ATTRS 5732 5733/* --------------------------------------------------------------------- */ 5734 5735static int __init thermal_init(struct ibm_init_struct *iibm) 5736{ 5737 u8 t, ta1, ta2; 5738 int i; 5739 int acpi_tmp7; 5740 int res; 5741 5742 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 5743 5744 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 5745 5746 if (thinkpad_id.ec_model) { 5747 /* 5748 * Direct EC access mode: sensors at registers 5749 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 5750 * non-implemented, thermal sensors return 0x80 when 5751 * not available 5752 */ 5753 5754 ta1 = ta2 = 0; 5755 for (i = 0; i < 8; i++) { 5756 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 5757 ta1 |= t; 5758 } else { 5759 ta1 = 0; 5760 break; 5761 } 5762 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 5763 ta2 |= t; 5764 } else { 5765 ta1 = 0; 5766 break; 5767 } 5768 } 5769 if (ta1 == 0) { 5770 /* This is sheer paranoia, but we handle it anyway */ 5771 if (acpi_tmp7) { 5772 printk(TPACPI_ERR 5773 "ThinkPad ACPI EC access misbehaving, " 5774 "falling back to ACPI TMPx access " 5775 "mode\n"); 5776 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5777 } else { 5778 printk(TPACPI_ERR 5779 "ThinkPad ACPI EC access misbehaving, " 5780 "disabling thermal sensors access\n"); 5781 thermal_read_mode = TPACPI_THERMAL_NONE; 5782 } 5783 } else { 5784 thermal_read_mode = 5785 (ta2 != 0) ? 5786 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 5787 } 5788 } else if (acpi_tmp7) { 5789 if (tpacpi_is_ibm() && 5790 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 5791 /* 600e/x, 770e, 770x */ 5792 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 5793 } else { 5794 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 5795 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5796 } 5797 } else { 5798 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 5799 thermal_read_mode = TPACPI_THERMAL_NONE; 5800 } 5801 5802 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 5803 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 5804 thermal_read_mode); 5805 5806 switch (thermal_read_mode) { 5807 case TPACPI_THERMAL_TPEC_16: 5808 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5809 &thermal_temp_input16_group); 5810 if (res) 5811 return res; 5812 break; 5813 case TPACPI_THERMAL_TPEC_8: 5814 case TPACPI_THERMAL_ACPI_TMP07: 5815 case TPACPI_THERMAL_ACPI_UPDT: 5816 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5817 &thermal_temp_input8_group); 5818 if (res) 5819 return res; 5820 break; 5821 case TPACPI_THERMAL_NONE: 5822 default: 5823 return 1; 5824 } 5825 5826 return 0; 5827} 5828 5829static void thermal_exit(void) 5830{ 5831 switch (thermal_read_mode) { 5832 case TPACPI_THERMAL_TPEC_16: 5833 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5834 &thermal_temp_input16_group); 5835 break; 5836 case TPACPI_THERMAL_TPEC_8: 5837 case TPACPI_THERMAL_ACPI_TMP07: 5838 case TPACPI_THERMAL_ACPI_UPDT: 5839 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5840 &thermal_temp_input8_group); 5841 break; 5842 case TPACPI_THERMAL_NONE: 5843 default: 5844 break; 5845 } 5846} 5847 5848static int thermal_read(struct seq_file *m) 5849{ 5850 int n, i; 5851 struct ibm_thermal_sensors_struct t; 5852 5853 n = thermal_get_sensors(&t); 5854 if (unlikely(n < 0)) 5855 return n; 5856 5857 seq_printf(m, "temperatures:\t"); 5858 5859 if (n > 0) { 5860 for (i = 0; i < (n - 1); i++) 5861 seq_printf(m, "%d ", t.temp[i] / 1000); 5862 seq_printf(m, "%d\n", t.temp[i] / 1000); 5863 } else 5864 seq_printf(m, "not supported\n"); 5865 5866 return 0; 5867} 5868 5869static struct ibm_struct thermal_driver_data = { 5870 .name = "thermal", 5871 .read = thermal_read, 5872 .exit = thermal_exit, 5873}; 5874 5875/************************************************************************* 5876 * Backlight/brightness subdriver 5877 */ 5878 5879#define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 5880 5881/* 5882 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 5883 * CMOS NVRAM byte 0x5E, bits 0-3. 5884 * 5885 * EC HBRV (0x31) has the following layout 5886 * Bit 7: unknown function 5887 * Bit 6: unknown function 5888 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 5889 * Bit 4: must be set to zero to avoid problems 5890 * Bit 3-0: backlight brightness level 5891 * 5892 * brightness_get_raw returns status data in the HBRV layout 5893 * 5894 * WARNING: The X61 has been verified to use HBRV for something else, so 5895 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 5896 * testing on the very early *60 Lenovo models... 5897 */ 5898 5899enum { 5900 TP_EC_BACKLIGHT = 0x31, 5901 5902 /* TP_EC_BACKLIGHT bitmasks */ 5903 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 5904 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 5905 TP_EC_BACKLIGHT_MAPSW = 0x20, 5906}; 5907 5908enum tpacpi_brightness_access_mode { 5909 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 5910 TPACPI_BRGHT_MODE_EC, /* EC control */ 5911 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 5912 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 5913 TPACPI_BRGHT_MODE_MAX 5914}; 5915 5916static struct backlight_device *ibm_backlight_device; 5917 5918static enum tpacpi_brightness_access_mode brightness_mode = 5919 TPACPI_BRGHT_MODE_MAX; 5920 5921static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 5922 5923static struct mutex brightness_mutex; 5924 5925/* NVRAM brightness access, 5926 * call with brightness_mutex held! */ 5927static unsigned int tpacpi_brightness_nvram_get(void) 5928{ 5929 u8 lnvram; 5930 5931 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 5932 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5933 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 5934 lnvram &= bright_maxlvl; 5935 5936 return lnvram; 5937} 5938 5939static void tpacpi_brightness_checkpoint_nvram(void) 5940{ 5941 u8 lec = 0; 5942 u8 b_nvram; 5943 5944 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 5945 return; 5946 5947 vdbg_printk(TPACPI_DBG_BRGHT, 5948 "trying to checkpoint backlight level to NVRAM...\n"); 5949 5950 if (mutex_lock_killable(&brightness_mutex) < 0) 5951 return; 5952 5953 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5954 goto unlock; 5955 lec &= TP_EC_BACKLIGHT_LVLMSK; 5956 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 5957 5958 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5959 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 5960 /* NVRAM needs update */ 5961 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 5962 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 5963 b_nvram |= lec; 5964 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 5965 dbg_printk(TPACPI_DBG_BRGHT, 5966 "updated NVRAM backlight level to %u (0x%02x)\n", 5967 (unsigned int) lec, (unsigned int) b_nvram); 5968 } else 5969 vdbg_printk(TPACPI_DBG_BRGHT, 5970 "NVRAM backlight level already is %u (0x%02x)\n", 5971 (unsigned int) lec, (unsigned int) b_nvram); 5972 5973unlock: 5974 mutex_unlock(&brightness_mutex); 5975} 5976 5977 5978/* call with brightness_mutex held! */ 5979static int tpacpi_brightness_get_raw(int *status) 5980{ 5981 u8 lec = 0; 5982 5983 switch (brightness_mode) { 5984 case TPACPI_BRGHT_MODE_UCMS_STEP: 5985 *status = tpacpi_brightness_nvram_get(); 5986 return 0; 5987 case TPACPI_BRGHT_MODE_EC: 5988 case TPACPI_BRGHT_MODE_ECNVRAM: 5989 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5990 return -EIO; 5991 *status = lec; 5992 return 0; 5993 default: 5994 return -ENXIO; 5995 } 5996} 5997 5998/* call with brightness_mutex held! */ 5999/* do NOT call with illegal backlight level value */ 6000static int tpacpi_brightness_set_ec(unsigned int value) 6001{ 6002 u8 lec = 0; 6003 6004 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6005 return -EIO; 6006 6007 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6008 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6009 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6010 return -EIO; 6011 6012 return 0; 6013} 6014 6015/* call with brightness_mutex held! */ 6016static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6017{ 6018 int cmos_cmd, inc; 6019 unsigned int current_value, i; 6020 6021 current_value = tpacpi_brightness_nvram_get(); 6022 6023 if (value == current_value) 6024 return 0; 6025 6026 cmos_cmd = (value > current_value) ? 6027 TP_CMOS_BRIGHTNESS_UP : 6028 TP_CMOS_BRIGHTNESS_DOWN; 6029 inc = (value > current_value) ? 1 : -1; 6030 6031 for (i = current_value; i != value; i += inc) 6032 if (issue_thinkpad_cmos_command(cmos_cmd)) 6033 return -EIO; 6034 6035 return 0; 6036} 6037 6038/* May return EINTR which can always be mapped to ERESTARTSYS */ 6039static int brightness_set(unsigned int value) 6040{ 6041 int res; 6042 6043 if (value > bright_maxlvl || value < 0) 6044 return -EINVAL; 6045 6046 vdbg_printk(TPACPI_DBG_BRGHT, 6047 "set backlight level to %d\n", value); 6048 6049 res = mutex_lock_killable(&brightness_mutex); 6050 if (res < 0) 6051 return res; 6052 6053 switch (brightness_mode) { 6054 case TPACPI_BRGHT_MODE_EC: 6055 case TPACPI_BRGHT_MODE_ECNVRAM: 6056 res = tpacpi_brightness_set_ec(value); 6057 break; 6058 case TPACPI_BRGHT_MODE_UCMS_STEP: 6059 res = tpacpi_brightness_set_ucmsstep(value); 6060 break; 6061 default: 6062 res = -ENXIO; 6063 } 6064 6065 mutex_unlock(&brightness_mutex); 6066 return res; 6067} 6068 6069/* sysfs backlight class ----------------------------------------------- */ 6070 6071static int brightness_update_status(struct backlight_device *bd) 6072{ 6073 unsigned int level = 6074 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6075 bd->props.power == FB_BLANK_UNBLANK) ? 6076 bd->props.brightness : 0; 6077 6078 dbg_printk(TPACPI_DBG_BRGHT, 6079 "backlight: attempt to set level to %d\n", 6080 level); 6081 6082 /* it is the backlight class's job (caller) to handle 6083 * EINTR and other errors properly */ 6084 return brightness_set(level); 6085} 6086 6087static int brightness_get(struct backlight_device *bd) 6088{ 6089 int status, res; 6090 6091 res = mutex_lock_killable(&brightness_mutex); 6092 if (res < 0) 6093 return 0; 6094 6095 res = tpacpi_brightness_get_raw(&status); 6096 6097 mutex_unlock(&brightness_mutex); 6098 6099 if (res < 0) 6100 return 0; 6101 6102 return status & TP_EC_BACKLIGHT_LVLMSK; 6103} 6104 6105static void tpacpi_brightness_notify_change(void) 6106{ 6107 backlight_force_update(ibm_backlight_device, 6108 BACKLIGHT_UPDATE_HOTKEY); 6109} 6110 6111static struct backlight_ops ibm_backlight_data = { 6112 .get_brightness = brightness_get, 6113 .update_status = brightness_update_status, 6114}; 6115 6116/* --------------------------------------------------------------------- */ 6117 6118/* 6119 * Call _BCL method of video device. On some ThinkPads this will 6120 * switch the firmware to the ACPI brightness control mode. 6121 */ 6122 6123static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6124{ 6125 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6126 union acpi_object *obj; 6127 int rc; 6128 6129 if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) { 6130 obj = (union acpi_object *)buffer.pointer; 6131 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6132 printk(TPACPI_ERR "Unknown _BCL data, " 6133 "please report this to %s\n", TPACPI_MAIL); 6134 rc = 0; 6135 } else { 6136 rc = obj->package.count; 6137 } 6138 } else { 6139 return 0; 6140 } 6141 6142 kfree(buffer.pointer); 6143 return rc; 6144} 6145 6146 6147/* 6148 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6149 */ 6150static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6151{ 6152 acpi_handle video_device; 6153 int bcl_levels = 0; 6154 6155 tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device); 6156 if (video_device) 6157 bcl_levels = tpacpi_query_bcl_levels(video_device); 6158 6159 tp_features.bright_acpimode = (bcl_levels > 0); 6160 6161 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6162} 6163 6164/* 6165 * These are only useful for models that have only one possibility 6166 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6167 * these quirks. 6168 */ 6169#define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6170#define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6171#define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6172 6173static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6174 /* Models with ATI GPUs known to require ECNVRAM mode */ 6175 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6176 6177 /* Models with ATI GPUs that can use ECNVRAM */ 6178 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6179 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6180 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6181 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6182 6183 /* Models with Intel Extreme Graphics 2 */ 6184 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6185 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6186 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6187 6188 /* Models with Intel GMA900 */ 6189 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6190 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6191 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6192}; 6193 6194/* 6195 * Returns < 0 for error, otherwise sets tp_features.bright_* 6196 * and bright_maxlvl. 6197 */ 6198static void __init tpacpi_detect_brightness_capabilities(void) 6199{ 6200 unsigned int b; 6201 6202 vdbg_printk(TPACPI_DBG_INIT, 6203 "detecting firmware brightness interface capabilities\n"); 6204 6205 /* we could run a quirks check here (same table used by 6206 * brightness_init) if needed */ 6207 6208 /* 6209 * We always attempt to detect acpi support, so as to switch 6210 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6211 * going to publish a backlight interface 6212 */ 6213 b = tpacpi_check_std_acpi_brightness_support(); 6214 switch (b) { 6215 case 16: 6216 bright_maxlvl = 15; 6217 printk(TPACPI_INFO 6218 "detected a 16-level brightness capable ThinkPad\n"); 6219 break; 6220 case 8: 6221 case 0: 6222 bright_maxlvl = 7; 6223 printk(TPACPI_INFO 6224 "detected a 8-level brightness capable ThinkPad\n"); 6225 break; 6226 default: 6227 printk(TPACPI_ERR 6228 "Unsupported brightness interface, " 6229 "please contact %s\n", TPACPI_MAIL); 6230 tp_features.bright_unkfw = 1; 6231 bright_maxlvl = b - 1; 6232 } 6233} 6234 6235static int __init brightness_init(struct ibm_init_struct *iibm) 6236{ 6237 struct backlight_properties props; 6238 int b; 6239 unsigned long quirks; 6240 6241 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6242 6243 mutex_init(&brightness_mutex); 6244 6245 quirks = tpacpi_check_quirks(brightness_quirk_table, 6246 ARRAY_SIZE(brightness_quirk_table)); 6247 6248 /* tpacpi_detect_brightness_capabilities() must have run already */ 6249 6250 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6251 if (tp_features.bright_unkfw) 6252 return 1; 6253 6254 if (!brightness_enable) { 6255 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6256 "brightness support disabled by " 6257 "module parameter\n"); 6258 return 1; 6259 } 6260 6261 if (acpi_video_backlight_support()) { 6262 if (brightness_enable > 1) { 6263 printk(TPACPI_INFO 6264 "Standard ACPI backlight interface " 6265 "available, not loading native one.\n"); 6266 return 1; 6267 } else if (brightness_enable == 1) { 6268 printk(TPACPI_WARN 6269 "Cannot enable backlight brightness support, " 6270 "ACPI is already handling it. Refer to the " 6271 "acpi_backlight kernel parameter\n"); 6272 return 1; 6273 } 6274 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6275 printk(TPACPI_NOTICE 6276 "Standard ACPI backlight interface not " 6277 "available, thinkpad_acpi native " 6278 "brightness control enabled\n"); 6279 } 6280 6281 /* 6282 * Check for module parameter bogosity, note that we 6283 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6284 * able to detect "unspecified" 6285 */ 6286 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6287 return -EINVAL; 6288 6289 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6290 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6291 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6292 if (quirks & TPACPI_BRGHT_Q_EC) 6293 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6294 else 6295 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6296 6297 dbg_printk(TPACPI_DBG_BRGHT, 6298 "driver auto-selected brightness_mode=%d\n", 6299 brightness_mode); 6300 } 6301 6302 /* Safety */ 6303 if (!tpacpi_is_ibm() && 6304 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6305 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6306 return -EINVAL; 6307 6308 if (tpacpi_brightness_get_raw(&b) < 0) 6309 return 1; 6310 6311 memset(&props, 0, sizeof(struct backlight_properties)); 6312 props.max_brightness = bright_maxlvl; 6313 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6314 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6315 NULL, NULL, 6316 &ibm_backlight_data, 6317 &props); 6318 if (IS_ERR(ibm_backlight_device)) { 6319 int rc = PTR_ERR(ibm_backlight_device); 6320 ibm_backlight_device = NULL; 6321 printk(TPACPI_ERR "Could not register backlight device\n"); 6322 return rc; 6323 } 6324 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6325 "brightness is supported\n"); 6326 6327 if (quirks & TPACPI_BRGHT_Q_ASK) { 6328 printk(TPACPI_NOTICE 6329 "brightness: will use unverified default: " 6330 "brightness_mode=%d\n", brightness_mode); 6331 printk(TPACPI_NOTICE 6332 "brightness: please report to %s whether it works well " 6333 "or not on your ThinkPad\n", TPACPI_MAIL); 6334 } 6335 6336 /* Added by mistake in early 2007. Probably useless, but it could 6337 * be working around some unknown firmware problem where the value 6338 * read at startup doesn't match the real hardware state... so leave 6339 * it in place just in case */ 6340 backlight_update_status(ibm_backlight_device); 6341 6342 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6343 "brightness: registering brightness hotkeys " 6344 "as change notification\n"); 6345 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6346 | TP_ACPI_HKEY_BRGHTUP_MASK 6347 | TP_ACPI_HKEY_BRGHTDWN_MASK);; 6348 return 0; 6349} 6350 6351static void brightness_suspend(pm_message_t state) 6352{ 6353 tpacpi_brightness_checkpoint_nvram(); 6354} 6355 6356static void brightness_shutdown(void) 6357{ 6358 tpacpi_brightness_checkpoint_nvram(); 6359} 6360 6361static void brightness_exit(void) 6362{ 6363 if (ibm_backlight_device) { 6364 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6365 "calling backlight_device_unregister()\n"); 6366 backlight_device_unregister(ibm_backlight_device); 6367 } 6368 6369 tpacpi_brightness_checkpoint_nvram(); 6370} 6371 6372static int brightness_read(struct seq_file *m) 6373{ 6374 int level; 6375 6376 level = brightness_get(NULL); 6377 if (level < 0) { 6378 seq_printf(m, "level:\t\tunreadable\n"); 6379 } else { 6380 seq_printf(m, "level:\t\t%d\n", level); 6381 seq_printf(m, "commands:\tup, down\n"); 6382 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6383 bright_maxlvl); 6384 } 6385 6386 return 0; 6387} 6388 6389static int brightness_write(char *buf) 6390{ 6391 int level; 6392 int rc; 6393 char *cmd; 6394 6395 level = brightness_get(NULL); 6396 if (level < 0) 6397 return level; 6398 6399 while ((cmd = next_cmd(&buf))) { 6400 if (strlencmp(cmd, "up") == 0) { 6401 if (level < bright_maxlvl) 6402 level++; 6403 } else if (strlencmp(cmd, "down") == 0) { 6404 if (level > 0) 6405 level--; 6406 } else if (sscanf(cmd, "level %d", &level) == 1 && 6407 level >= 0 && level <= bright_maxlvl) { 6408 /* new level set */ 6409 } else 6410 return -EINVAL; 6411 } 6412 6413 tpacpi_disclose_usertask("procfs brightness", 6414 "set level to %d\n", level); 6415 6416 /* 6417 * Now we know what the final level should be, so we try to set it. 6418 * Doing it this way makes the syscall restartable in case of EINTR 6419 */ 6420 rc = brightness_set(level); 6421 if (!rc && ibm_backlight_device) 6422 backlight_force_update(ibm_backlight_device, 6423 BACKLIGHT_UPDATE_SYSFS); 6424 return (rc == -EINTR)? -ERESTARTSYS : rc; 6425} 6426 6427static struct ibm_struct brightness_driver_data = { 6428 .name = "brightness", 6429 .read = brightness_read, 6430 .write = brightness_write, 6431 .exit = brightness_exit, 6432 .suspend = brightness_suspend, 6433 .shutdown = brightness_shutdown, 6434}; 6435 6436/************************************************************************* 6437 * Volume subdriver 6438 */ 6439 6440/* 6441 * IBM ThinkPads have a simple volume controller with MUTE gating. 6442 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 6443 * 6444 * Since the *61 series (and probably also the later *60 series), Lenovo 6445 * ThinkPads only implement the MUTE gate. 6446 * 6447 * EC register 0x30 6448 * Bit 6: MUTE (1 mutes sound) 6449 * Bit 3-0: Volume 6450 * Other bits should be zero as far as we know. 6451 * 6452 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 6453 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 6454 * such as bit 7 which is used to detect repeated presses of MUTE, 6455 * and we leave them unchanged. 6456 */ 6457 6458#ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 6459 6460#define TPACPI_ALSA_DRVNAME "ThinkPad EC" 6461#define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 6462#define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 6463 6464static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */ 6465static char *alsa_id = "ThinkPadEC"; 6466static int alsa_enable = SNDRV_DEFAULT_ENABLE1; 6467 6468struct tpacpi_alsa_data { 6469 struct snd_card *card; 6470 struct snd_ctl_elem_id *ctl_mute_id; 6471 struct snd_ctl_elem_id *ctl_vol_id; 6472}; 6473 6474static struct snd_card *alsa_card; 6475 6476enum { 6477 TP_EC_AUDIO = 0x30, 6478 6479 /* TP_EC_AUDIO bits */ 6480 TP_EC_AUDIO_MUTESW = 6, 6481 6482 /* TP_EC_AUDIO bitmasks */ 6483 TP_EC_AUDIO_LVL_MSK = 0x0F, 6484 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 6485 6486 /* Maximum volume */ 6487 TP_EC_VOLUME_MAX = 14, 6488}; 6489 6490enum tpacpi_volume_access_mode { 6491 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 6492 TPACPI_VOL_MODE_EC, /* Pure EC control */ 6493 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 6494 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6495 TPACPI_VOL_MODE_MAX 6496}; 6497 6498enum tpacpi_volume_capabilities { 6499 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 6500 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 6501 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 6502 TPACPI_VOL_CAP_MAX 6503}; 6504 6505static enum tpacpi_volume_access_mode volume_mode = 6506 TPACPI_VOL_MODE_MAX; 6507 6508static enum tpacpi_volume_capabilities volume_capabilities; 6509static int volume_control_allowed; 6510 6511/* 6512 * Used to syncronize writers to TP_EC_AUDIO and 6513 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 6514 */ 6515static struct mutex volume_mutex; 6516 6517static void tpacpi_volume_checkpoint_nvram(void) 6518{ 6519 u8 lec = 0; 6520 u8 b_nvram; 6521 u8 ec_mask; 6522 6523 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 6524 return; 6525 if (!volume_control_allowed) 6526 return; 6527 6528 vdbg_printk(TPACPI_DBG_MIXER, 6529 "trying to checkpoint mixer state to NVRAM...\n"); 6530 6531 if (tp_features.mixer_no_level_control) 6532 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 6533 else 6534 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 6535 6536 if (mutex_lock_killable(&volume_mutex) < 0) 6537 return; 6538 6539 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 6540 goto unlock; 6541 lec &= ec_mask; 6542 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 6543 6544 if (lec != (b_nvram & ec_mask)) { 6545 /* NVRAM needs update */ 6546 b_nvram &= ~ec_mask; 6547 b_nvram |= lec; 6548 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 6549 dbg_printk(TPACPI_DBG_MIXER, 6550 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 6551 (unsigned int) lec, (unsigned int) b_nvram); 6552 } else { 6553 vdbg_printk(TPACPI_DBG_MIXER, 6554 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 6555 (unsigned int) lec, (unsigned int) b_nvram); 6556 } 6557 6558unlock: 6559 mutex_unlock(&volume_mutex); 6560} 6561 6562static int volume_get_status_ec(u8 *status) 6563{ 6564 u8 s; 6565 6566 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 6567 return -EIO; 6568 6569 *status = s; 6570 6571 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 6572 6573 return 0; 6574} 6575 6576static int volume_get_status(u8 *status) 6577{ 6578 return volume_get_status_ec(status); 6579} 6580 6581static int volume_set_status_ec(const u8 status) 6582{ 6583 if (!acpi_ec_write(TP_EC_AUDIO, status)) 6584 return -EIO; 6585 6586 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 6587 6588 return 0; 6589} 6590 6591static int volume_set_status(const u8 status) 6592{ 6593 return volume_set_status_ec(status); 6594} 6595 6596/* returns < 0 on error, 0 on no change, 1 on change */ 6597static int __volume_set_mute_ec(const bool mute) 6598{ 6599 int rc; 6600 u8 s, n; 6601 6602 if (mutex_lock_killable(&volume_mutex) < 0) 6603 return -EINTR; 6604 6605 rc = volume_get_status_ec(&s); 6606 if (rc) 6607 goto unlock; 6608 6609 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 6610 s & ~TP_EC_AUDIO_MUTESW_MSK; 6611 6612 if (n != s) { 6613 rc = volume_set_status_ec(n); 6614 if (!rc) 6615 rc = 1; 6616 } 6617 6618unlock: 6619 mutex_unlock(&volume_mutex); 6620 return rc; 6621} 6622 6623static int volume_alsa_set_mute(const bool mute) 6624{ 6625 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 6626 (mute) ? "" : "un"); 6627 return __volume_set_mute_ec(mute); 6628} 6629 6630static int volume_set_mute(const bool mute) 6631{ 6632 int rc; 6633 6634 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 6635 (mute) ? "" : "un"); 6636 6637 rc = __volume_set_mute_ec(mute); 6638 return (rc < 0) ? rc : 0; 6639} 6640 6641/* returns < 0 on error, 0 on no change, 1 on change */ 6642static int __volume_set_volume_ec(const u8 vol) 6643{ 6644 int rc; 6645 u8 s, n; 6646 6647 if (vol > TP_EC_VOLUME_MAX) 6648 return -EINVAL; 6649 6650 if (mutex_lock_killable(&volume_mutex) < 0) 6651 return -EINTR; 6652 6653 rc = volume_get_status_ec(&s); 6654 if (rc) 6655 goto unlock; 6656 6657 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 6658 6659 if (n != s) { 6660 rc = volume_set_status_ec(n); 6661 if (!rc) 6662 rc = 1; 6663 } 6664 6665unlock: 6666 mutex_unlock(&volume_mutex); 6667 return rc; 6668} 6669 6670static int volume_alsa_set_volume(const u8 vol) 6671{ 6672 dbg_printk(TPACPI_DBG_MIXER, 6673 "ALSA: trying to set volume level to %hu\n", vol); 6674 return __volume_set_volume_ec(vol); 6675} 6676 6677static void volume_alsa_notify_change(void) 6678{ 6679 struct tpacpi_alsa_data *d; 6680 6681 if (alsa_card && alsa_card->private_data) { 6682 d = alsa_card->private_data; 6683 if (d->ctl_mute_id) 6684 snd_ctl_notify(alsa_card, 6685 SNDRV_CTL_EVENT_MASK_VALUE, 6686 d->ctl_mute_id); 6687 if (d->ctl_vol_id) 6688 snd_ctl_notify(alsa_card, 6689 SNDRV_CTL_EVENT_MASK_VALUE, 6690 d->ctl_vol_id); 6691 } 6692} 6693 6694static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 6695 struct snd_ctl_elem_info *uinfo) 6696{ 6697 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 6698 uinfo->count = 1; 6699 uinfo->value.integer.min = 0; 6700 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 6701 return 0; 6702} 6703 6704static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 6705 struct snd_ctl_elem_value *ucontrol) 6706{ 6707 u8 s; 6708 int rc; 6709 6710 rc = volume_get_status(&s); 6711 if (rc < 0) 6712 return rc; 6713 6714 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 6715 return 0; 6716} 6717 6718static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 6719 struct snd_ctl_elem_value *ucontrol) 6720{ 6721 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 6722 ucontrol->value.integer.value[0]); 6723 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 6724} 6725 6726#define volume_alsa_mute_info snd_ctl_boolean_mono_info 6727 6728static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 6729 struct snd_ctl_elem_value *ucontrol) 6730{ 6731 u8 s; 6732 int rc; 6733 6734 rc = volume_get_status(&s); 6735 if (rc < 0) 6736 return rc; 6737 6738 ucontrol->value.integer.value[0] = 6739 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 6740 return 0; 6741} 6742 6743static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 6744 struct snd_ctl_elem_value *ucontrol) 6745{ 6746 tpacpi_disclose_usertask("ALSA", "%smute\n", 6747 ucontrol->value.integer.value[0] ? 6748 "un" : ""); 6749 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 6750} 6751 6752static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = { 6753 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6754 .name = "Console Playback Volume", 6755 .index = 0, 6756 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6757 .info = volume_alsa_vol_info, 6758 .get = volume_alsa_vol_get, 6759}; 6760 6761static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = { 6762 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6763 .name = "Console Playback Switch", 6764 .index = 0, 6765 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6766 .info = volume_alsa_mute_info, 6767 .get = volume_alsa_mute_get, 6768}; 6769 6770static void volume_suspend(pm_message_t state) 6771{ 6772 tpacpi_volume_checkpoint_nvram(); 6773} 6774 6775static void volume_resume(void) 6776{ 6777 volume_alsa_notify_change(); 6778} 6779 6780static void volume_shutdown(void) 6781{ 6782 tpacpi_volume_checkpoint_nvram(); 6783} 6784 6785static void volume_exit(void) 6786{ 6787 if (alsa_card) { 6788 snd_card_free(alsa_card); 6789 alsa_card = NULL; 6790 } 6791 6792 tpacpi_volume_checkpoint_nvram(); 6793} 6794 6795static int __init volume_create_alsa_mixer(void) 6796{ 6797 struct snd_card *card; 6798 struct tpacpi_alsa_data *data; 6799 struct snd_kcontrol *ctl_vol; 6800 struct snd_kcontrol *ctl_mute; 6801 int rc; 6802 6803 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE, 6804 sizeof(struct tpacpi_alsa_data), &card); 6805 if (rc < 0 || !card) { 6806 printk(TPACPI_ERR 6807 "Failed to create ALSA card structures: %d\n", rc); 6808 return 1; 6809 } 6810 6811 BUG_ON(!card->private_data); 6812 data = card->private_data; 6813 data->card = card; 6814 6815 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 6816 sizeof(card->driver)); 6817 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 6818 sizeof(card->shortname)); 6819 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 6820 (thinkpad_id.ec_version_str) ? 6821 thinkpad_id.ec_version_str : "(unknown)"); 6822 snprintf(card->longname, sizeof(card->longname), 6823 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 6824 (thinkpad_id.ec_version_str) ? 6825 thinkpad_id.ec_version_str : "unknown"); 6826 6827 if (volume_control_allowed) { 6828 volume_alsa_control_vol.put = volume_alsa_vol_put; 6829 volume_alsa_control_vol.access = 6830 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6831 6832 volume_alsa_control_mute.put = volume_alsa_mute_put; 6833 volume_alsa_control_mute.access = 6834 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6835 } 6836 6837 if (!tp_features.mixer_no_level_control) { 6838 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 6839 rc = snd_ctl_add(card, ctl_vol); 6840 if (rc < 0) { 6841 printk(TPACPI_ERR 6842 "Failed to create ALSA volume control: %d\n", 6843 rc); 6844 goto err_exit; 6845 } 6846 data->ctl_vol_id = &ctl_vol->id; 6847 } 6848 6849 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 6850 rc = snd_ctl_add(card, ctl_mute); 6851 if (rc < 0) { 6852 printk(TPACPI_ERR "Failed to create ALSA mute control: %d\n", 6853 rc); 6854 goto err_exit; 6855 } 6856 data->ctl_mute_id = &ctl_mute->id; 6857 6858 snd_card_set_dev(card, &tpacpi_pdev->dev); 6859 rc = snd_card_register(card); 6860 if (rc < 0) { 6861 printk(TPACPI_ERR "Failed to register ALSA card: %d\n", rc); 6862 goto err_exit; 6863 } 6864 6865 alsa_card = card; 6866 return 0; 6867 6868err_exit: 6869 snd_card_free(card); 6870 return 1; 6871} 6872 6873#define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 6874#define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 6875 6876static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 6877 /* Whitelist volume level on all IBM by default */ 6878 { .vendor = PCI_VENDOR_ID_IBM, 6879 .bios = TPACPI_MATCH_ANY, 6880 .ec = TPACPI_MATCH_ANY, 6881 .quirks = TPACPI_VOL_Q_LEVEL }, 6882 6883 /* Lenovo models with volume control (needs confirmation) */ 6884 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 6885 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 6886 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 6887 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 6888 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 6889 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 6890 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 6891 6892 /* Whitelist mute-only on all Lenovo by default */ 6893 { .vendor = PCI_VENDOR_ID_LENOVO, 6894 .bios = TPACPI_MATCH_ANY, 6895 .ec = TPACPI_MATCH_ANY, 6896 .quirks = TPACPI_VOL_Q_MUTEONLY } 6897}; 6898 6899static int __init volume_init(struct ibm_init_struct *iibm) 6900{ 6901 unsigned long quirks; 6902 int rc; 6903 6904 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 6905 6906 mutex_init(&volume_mutex); 6907 6908 /* 6909 * Check for module parameter bogosity, note that we 6910 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 6911 * able to detect "unspecified" 6912 */ 6913 if (volume_mode > TPACPI_VOL_MODE_MAX) 6914 return -EINVAL; 6915 6916 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 6917 printk(TPACPI_ERR 6918 "UCMS step volume mode not implemented, " 6919 "please contact %s\n", TPACPI_MAIL); 6920 return 1; 6921 } 6922 6923 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 6924 return -EINVAL; 6925 6926 /* 6927 * The ALSA mixer is our primary interface. 6928 * When disabled, don't install the subdriver at all 6929 */ 6930 if (!alsa_enable) { 6931 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6932 "ALSA mixer disabled by parameter, " 6933 "not loading volume subdriver...\n"); 6934 return 1; 6935 } 6936 6937 quirks = tpacpi_check_quirks(volume_quirk_table, 6938 ARRAY_SIZE(volume_quirk_table)); 6939 6940 switch (volume_capabilities) { 6941 case TPACPI_VOL_CAP_AUTO: 6942 if (quirks & TPACPI_VOL_Q_MUTEONLY) 6943 tp_features.mixer_no_level_control = 1; 6944 else if (quirks & TPACPI_VOL_Q_LEVEL) 6945 tp_features.mixer_no_level_control = 0; 6946 else 6947 return 1; /* no mixer */ 6948 break; 6949 case TPACPI_VOL_CAP_VOLMUTE: 6950 tp_features.mixer_no_level_control = 0; 6951 break; 6952 case TPACPI_VOL_CAP_MUTEONLY: 6953 tp_features.mixer_no_level_control = 1; 6954 break; 6955 default: 6956 return 1; 6957 } 6958 6959 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 6960 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6961 "using user-supplied volume_capabilities=%d\n", 6962 volume_capabilities); 6963 6964 if (volume_mode == TPACPI_VOL_MODE_AUTO || 6965 volume_mode == TPACPI_VOL_MODE_MAX) { 6966 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 6967 6968 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6969 "driver auto-selected volume_mode=%d\n", 6970 volume_mode); 6971 } else { 6972 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6973 "using user-supplied volume_mode=%d\n", 6974 volume_mode); 6975 } 6976 6977 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6978 "mute is supported, volume control is %s\n", 6979 str_supported(!tp_features.mixer_no_level_control)); 6980 6981 rc = volume_create_alsa_mixer(); 6982 if (rc) { 6983 printk(TPACPI_ERR 6984 "Could not create the ALSA mixer interface\n"); 6985 return rc; 6986 } 6987 6988 printk(TPACPI_INFO 6989 "Console audio control enabled, mode: %s\n", 6990 (volume_control_allowed) ? 6991 "override (read/write)" : 6992 "monitor (read only)"); 6993 6994 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6995 "registering volume hotkeys as change notification\n"); 6996 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6997 | TP_ACPI_HKEY_VOLUP_MASK 6998 | TP_ACPI_HKEY_VOLDWN_MASK 6999 | TP_ACPI_HKEY_MUTE_MASK); 7000 7001 return 0; 7002} 7003 7004static int volume_read(struct seq_file *m) 7005{ 7006 u8 status; 7007 7008 if (volume_get_status(&status) < 0) { 7009 seq_printf(m, "level:\t\tunreadable\n"); 7010 } else { 7011 if (tp_features.mixer_no_level_control) 7012 seq_printf(m, "level:\t\tunsupported\n"); 7013 else 7014 seq_printf(m, "level:\t\t%d\n", 7015 status & TP_EC_AUDIO_LVL_MSK); 7016 7017 seq_printf(m, "mute:\t\t%s\n", 7018 onoff(status, TP_EC_AUDIO_MUTESW)); 7019 7020 if (volume_control_allowed) { 7021 seq_printf(m, "commands:\tunmute, mute\n"); 7022 if (!tp_features.mixer_no_level_control) { 7023 seq_printf(m, 7024 "commands:\tup, down\n"); 7025 seq_printf(m, 7026 "commands:\tlevel <level>" 7027 " (<level> is 0-%d)\n", 7028 TP_EC_VOLUME_MAX); 7029 } 7030 } 7031 } 7032 7033 return 0; 7034} 7035 7036static int volume_write(char *buf) 7037{ 7038 u8 s; 7039 u8 new_level, new_mute; 7040 int l; 7041 char *cmd; 7042 int rc; 7043 7044 /* 7045 * We do allow volume control at driver startup, so that the 7046 * user can set initial state through the volume=... parameter hack. 7047 */ 7048 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7049 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7050 tp_warned.volume_ctrl_forbidden = 1; 7051 printk(TPACPI_NOTICE 7052 "Console audio control in monitor mode, " 7053 "changes are not allowed.\n"); 7054 printk(TPACPI_NOTICE 7055 "Use the volume_control=1 module parameter " 7056 "to enable volume control\n"); 7057 } 7058 return -EPERM; 7059 } 7060 7061 rc = volume_get_status(&s); 7062 if (rc < 0) 7063 return rc; 7064 7065 new_level = s & TP_EC_AUDIO_LVL_MSK; 7066 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7067 7068 while ((cmd = next_cmd(&buf))) { 7069 if (!tp_features.mixer_no_level_control) { 7070 if (strlencmp(cmd, "up") == 0) { 7071 if (new_mute) 7072 new_mute = 0; 7073 else if (new_level < TP_EC_VOLUME_MAX) 7074 new_level++; 7075 continue; 7076 } else if (strlencmp(cmd, "down") == 0) { 7077 if (new_mute) 7078 new_mute = 0; 7079 else if (new_level > 0) 7080 new_level--; 7081 continue; 7082 } else if (sscanf(cmd, "level %u", &l) == 1 && 7083 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7084 new_level = l; 7085 continue; 7086 } 7087 } 7088 if (strlencmp(cmd, "mute") == 0) 7089 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7090 else if (strlencmp(cmd, "unmute") == 0) 7091 new_mute = 0; 7092 else 7093 return -EINVAL; 7094 } 7095 7096 if (tp_features.mixer_no_level_control) { 7097 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7098 new_mute ? "" : "un"); 7099 rc = volume_set_mute(!!new_mute); 7100 } else { 7101 tpacpi_disclose_usertask("procfs volume", 7102 "%smute and set level to %d\n", 7103 new_mute ? "" : "un", new_level); 7104 rc = volume_set_status(new_mute | new_level); 7105 } 7106 volume_alsa_notify_change(); 7107 7108 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7109} 7110 7111static struct ibm_struct volume_driver_data = { 7112 .name = "volume", 7113 .read = volume_read, 7114 .write = volume_write, 7115 .exit = volume_exit, 7116 .suspend = volume_suspend, 7117 .resume = volume_resume, 7118 .shutdown = volume_shutdown, 7119}; 7120 7121#else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7122 7123#define alsa_card NULL 7124 7125static void inline volume_alsa_notify_change(void) 7126{ 7127} 7128 7129static int __init volume_init(struct ibm_init_struct *iibm) 7130{ 7131 printk(TPACPI_INFO 7132 "volume: disabled as there is no ALSA support in this kernel\n"); 7133 7134 return 1; 7135} 7136 7137static struct ibm_struct volume_driver_data = { 7138 .name = "volume", 7139}; 7140 7141#endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7142 7143/************************************************************************* 7144 * Fan subdriver 7145 */ 7146 7147/* 7148 * FAN ACCESS MODES 7149 * 7150 * TPACPI_FAN_RD_ACPI_GFAN: 7151 * ACPI GFAN method: returns fan level 7152 * 7153 * see TPACPI_FAN_WR_ACPI_SFAN 7154 * EC 0x2f (HFSP) not available if GFAN exists 7155 * 7156 * TPACPI_FAN_WR_ACPI_SFAN: 7157 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7158 * 7159 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7160 * it for writing. 7161 * 7162 * TPACPI_FAN_WR_TPEC: 7163 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7164 * Supported on almost all ThinkPads 7165 * 7166 * Fan speed changes of any sort (including those caused by the 7167 * disengaged mode) are usually done slowly by the firmware as the 7168 * maximum amount of fan duty cycle change per second seems to be 7169 * limited. 7170 * 7171 * Reading is not available if GFAN exists. 7172 * Writing is not available if SFAN exists. 7173 * 7174 * Bits 7175 * 7 automatic mode engaged; 7176 * (default operation mode of the ThinkPad) 7177 * fan level is ignored in this mode. 7178 * 6 full speed mode (takes precedence over bit 7); 7179 * not available on all thinkpads. May disable 7180 * the tachometer while the fan controller ramps up 7181 * the speed (which can take up to a few *minutes*). 7182 * Speeds up fan to 100% duty-cycle, which is far above 7183 * the standard RPM levels. It is not impossible that 7184 * it could cause hardware damage. 7185 * 5-3 unused in some models. Extra bits for fan level 7186 * in others, but still useless as all values above 7187 * 7 map to the same speed as level 7 in these models. 7188 * 2-0 fan level (0..7 usually) 7189 * 0x00 = stop 7190 * 0x07 = max (set when temperatures critical) 7191 * Some ThinkPads may have other levels, see 7192 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7193 * 7194 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7195 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT 7196 * does so, its initial value is meaningless (0x07). 7197 * 7198 * For firmware bugs, refer to: 7199 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7200 * 7201 * ---- 7202 * 7203 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7204 * Main fan tachometer reading (in RPM) 7205 * 7206 * This register is present on all ThinkPads with a new-style EC, and 7207 * it is known not to be present on the A21m/e, and T22, as there is 7208 * something else in offset 0x84 according to the ACPI DSDT. Other 7209 * ThinkPads from this same time period (and earlier) probably lack the 7210 * tachometer as well. 7211 * 7212 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7213 * was never fixed by IBM to report the EC firmware version string 7214 * probably support the tachometer (like the early X models), so 7215 * detecting it is quite hard. We need more data to know for sure. 7216 * 7217 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7218 * might result. 7219 * 7220 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7221 * mode. 7222 * 7223 * For firmware bugs, refer to: 7224 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7225 * 7226 * ---- 7227 * 7228 * ThinkPad EC register 0x31 bit 0 (only on select models) 7229 * 7230 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7231 * show the speed of the main fan. When bit 0 of EC register 0x31 7232 * is one, the tachometer registers show the speed of the auxiliary 7233 * fan. 7234 * 7235 * Fan control seems to affect both fans, regardless of the state 7236 * of this bit. 7237 * 7238 * So far, only the firmware for the X60/X61 non-tablet versions 7239 * seem to support this (firmware TP-7M). 7240 * 7241 * TPACPI_FAN_WR_ACPI_FANS: 7242 * ThinkPad X31, X40, X41. Not available in the X60. 7243 * 7244 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7245 * high speed. ACPI DSDT seems to map these three speeds to levels 7246 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7247 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7248 * 7249 * The speeds are stored on handles 7250 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7251 * 7252 * There are three default speed sets, accessible as handles: 7253 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7254 * 7255 * ACPI DSDT switches which set is in use depending on various 7256 * factors. 7257 * 7258 * TPACPI_FAN_WR_TPEC is also available and should be used to 7259 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7260 * but the ACPI tables just mention level 7. 7261 */ 7262 7263enum { /* Fan control constants */ 7264 fan_status_offset = 0x2f, /* EC register 0x2f */ 7265 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7266 * 0x84 must be read before 0x85 */ 7267 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7268 bit 0 selects which fan is active */ 7269 7270 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7271 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7272 7273 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7274}; 7275 7276enum fan_status_access_mode { 7277 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7278 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7279 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7280}; 7281 7282enum fan_control_access_mode { 7283 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7284 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7285 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7286 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7287}; 7288 7289enum fan_control_commands { 7290 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7291 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7292 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7293 * and also watchdog cmd */ 7294}; 7295 7296static int fan_control_allowed; 7297 7298static enum fan_status_access_mode fan_status_access_mode; 7299static enum fan_control_access_mode fan_control_access_mode; 7300static enum fan_control_commands fan_control_commands; 7301 7302static u8 fan_control_initial_status; 7303static u8 fan_control_desired_level; 7304static u8 fan_control_resume_level; 7305static int fan_watchdog_maxinterval; 7306 7307static struct mutex fan_mutex; 7308 7309static void fan_watchdog_fire(struct work_struct *ignored); 7310static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7311 7312TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7313TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7314 "\\FSPD", /* 600e/x, 770e, 770x */ 7315 ); /* all others */ 7316TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7317 "JFNS", /* 770x-JL */ 7318 ); /* all others */ 7319 7320/* 7321 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7322 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7323 * be in auto mode (0x80). 7324 * 7325 * This is corrected by any write to HFSP either by the driver, or 7326 * by the firmware. 7327 * 7328 * We assume 0x07 really means auto mode while this quirk is active, 7329 * as this is far more likely than the ThinkPad being in level 7, 7330 * which is only used by the firmware during thermal emergencies. 7331 * 7332 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7333 * TP-70 (T43, R52), which are known to be buggy. 7334 */ 7335 7336static void fan_quirk1_setup(void) 7337{ 7338 if (fan_control_initial_status == 0x07) { 7339 printk(TPACPI_NOTICE 7340 "fan_init: initial fan status is unknown, " 7341 "assuming it is in auto mode\n"); 7342 tp_features.fan_ctrl_status_undef = 1; 7343 } 7344} 7345 7346static void fan_quirk1_handle(u8 *fan_status) 7347{ 7348 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7349 if (*fan_status != fan_control_initial_status) { 7350 /* something changed the HFSP regisnter since 7351 * driver init time, so it is not undefined 7352 * anymore */ 7353 tp_features.fan_ctrl_status_undef = 0; 7354 } else { 7355 /* Return most likely status. In fact, it 7356 * might be the only possible status */ 7357 *fan_status = TP_EC_FAN_AUTO; 7358 } 7359 } 7360} 7361 7362/* Select main fan on X60/X61, NOOP on others */ 7363static bool fan_select_fan1(void) 7364{ 7365 if (tp_features.second_fan) { 7366 u8 val; 7367 7368 if (ec_read(fan_select_offset, &val) < 0) 7369 return false; 7370 val &= 0xFEU; 7371 if (ec_write(fan_select_offset, val) < 0) 7372 return false; 7373 } 7374 return true; 7375} 7376 7377/* Select secondary fan on X60/X61 */ 7378static bool fan_select_fan2(void) 7379{ 7380 u8 val; 7381 7382 if (!tp_features.second_fan) 7383 return false; 7384 7385 if (ec_read(fan_select_offset, &val) < 0) 7386 return false; 7387 val |= 0x01U; 7388 if (ec_write(fan_select_offset, val) < 0) 7389 return false; 7390 7391 return true; 7392} 7393 7394/* 7395 * Call with fan_mutex held 7396 */ 7397static void fan_update_desired_level(u8 status) 7398{ 7399 if ((status & 7400 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7401 if (status > 7) 7402 fan_control_desired_level = 7; 7403 else 7404 fan_control_desired_level = status; 7405 } 7406} 7407 7408static int fan_get_status(u8 *status) 7409{ 7410 u8 s; 7411 7412 /* TODO: 7413 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 7414 7415 switch (fan_status_access_mode) { 7416 case TPACPI_FAN_RD_ACPI_GFAN: 7417 /* 570, 600e/x, 770e, 770x */ 7418 7419 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d"))) 7420 return -EIO; 7421 7422 if (likely(status)) 7423 *status = s & 0x07; 7424 7425 break; 7426 7427 case TPACPI_FAN_RD_TPEC: 7428 /* all except 570, 600e/x, 770e, 770x */ 7429 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 7430 return -EIO; 7431 7432 if (likely(status)) { 7433 *status = s; 7434 fan_quirk1_handle(status); 7435 } 7436 7437 break; 7438 7439 default: 7440 return -ENXIO; 7441 } 7442 7443 return 0; 7444} 7445 7446static int fan_get_status_safe(u8 *status) 7447{ 7448 int rc; 7449 u8 s; 7450 7451 if (mutex_lock_killable(&fan_mutex)) 7452 return -ERESTARTSYS; 7453 rc = fan_get_status(&s); 7454 if (!rc) 7455 fan_update_desired_level(s); 7456 mutex_unlock(&fan_mutex); 7457 7458 if (status) 7459 *status = s; 7460 7461 return rc; 7462} 7463 7464static int fan_get_speed(unsigned int *speed) 7465{ 7466 u8 hi, lo; 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_fan1())) 7472 return -EIO; 7473 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 7474 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 7475 return -EIO; 7476 7477 if (likely(speed)) 7478 *speed = (hi << 8) | lo; 7479 7480 break; 7481 7482 default: 7483 return -ENXIO; 7484 } 7485 7486 return 0; 7487} 7488 7489static int fan2_get_speed(unsigned int *speed) 7490{ 7491 u8 hi, lo; 7492 bool rc; 7493 7494 switch (fan_status_access_mode) { 7495 case TPACPI_FAN_RD_TPEC: 7496 /* all except 570, 600e/x, 770e, 770x */ 7497 if (unlikely(!fan_select_fan2())) 7498 return -EIO; 7499 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 7500 !acpi_ec_read(fan_rpm_offset + 1, &hi); 7501 fan_select_fan1(); /* play it safe */ 7502 if (rc) 7503 return -EIO; 7504 7505 if (likely(speed)) 7506 *speed = (hi << 8) | lo; 7507 7508 break; 7509 7510 default: 7511 return -ENXIO; 7512 } 7513 7514 return 0; 7515} 7516 7517static int fan_set_level(int level) 7518{ 7519 if (!fan_control_allowed) 7520 return -EPERM; 7521 7522 switch (fan_control_access_mode) { 7523 case TPACPI_FAN_WR_ACPI_SFAN: 7524 if (level >= 0 && level <= 7) { 7525 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 7526 return -EIO; 7527 } else 7528 return -EINVAL; 7529 break; 7530 7531 case TPACPI_FAN_WR_ACPI_FANS: 7532 case TPACPI_FAN_WR_TPEC: 7533 if (!(level & TP_EC_FAN_AUTO) && 7534 !(level & TP_EC_FAN_FULLSPEED) && 7535 ((level < 0) || (level > 7))) 7536 return -EINVAL; 7537 7538 /* safety net should the EC not support AUTO 7539 * or FULLSPEED mode bits and just ignore them */ 7540 if (level & TP_EC_FAN_FULLSPEED) 7541 level |= 7; /* safety min speed 7 */ 7542 else if (level & TP_EC_FAN_AUTO) 7543 level |= 4; /* safety min speed 4 */ 7544 7545 if (!acpi_ec_write(fan_status_offset, level)) 7546 return -EIO; 7547 else 7548 tp_features.fan_ctrl_status_undef = 0; 7549 break; 7550 7551 default: 7552 return -ENXIO; 7553 } 7554 7555 vdbg_printk(TPACPI_DBG_FAN, 7556 "fan control: set fan control register to 0x%02x\n", level); 7557 return 0; 7558} 7559 7560static int fan_set_level_safe(int level) 7561{ 7562 int rc; 7563 7564 if (!fan_control_allowed) 7565 return -EPERM; 7566 7567 if (mutex_lock_killable(&fan_mutex)) 7568 return -ERESTARTSYS; 7569 7570 if (level == TPACPI_FAN_LAST_LEVEL) 7571 level = fan_control_desired_level; 7572 7573 rc = fan_set_level(level); 7574 if (!rc) 7575 fan_update_desired_level(level); 7576 7577 mutex_unlock(&fan_mutex); 7578 return rc; 7579} 7580 7581static int fan_set_enable(void) 7582{ 7583 u8 s; 7584 int rc; 7585 7586 if (!fan_control_allowed) 7587 return -EPERM; 7588 7589 if (mutex_lock_killable(&fan_mutex)) 7590 return -ERESTARTSYS; 7591 7592 switch (fan_control_access_mode) { 7593 case TPACPI_FAN_WR_ACPI_FANS: 7594 case TPACPI_FAN_WR_TPEC: 7595 rc = fan_get_status(&s); 7596 if (rc < 0) 7597 break; 7598 7599 /* Don't go out of emergency fan mode */ 7600 if (s != 7) { 7601 s &= 0x07; 7602 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 7603 } 7604 7605 if (!acpi_ec_write(fan_status_offset, s)) 7606 rc = -EIO; 7607 else { 7608 tp_features.fan_ctrl_status_undef = 0; 7609 rc = 0; 7610 } 7611 break; 7612 7613 case TPACPI_FAN_WR_ACPI_SFAN: 7614 rc = fan_get_status(&s); 7615 if (rc < 0) 7616 break; 7617 7618 s &= 0x07; 7619 7620 /* Set fan to at least level 4 */ 7621 s |= 4; 7622 7623 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 7624 rc = -EIO; 7625 else 7626 rc = 0; 7627 break; 7628 7629 default: 7630 rc = -ENXIO; 7631 } 7632 7633 mutex_unlock(&fan_mutex); 7634 7635 if (!rc) 7636 vdbg_printk(TPACPI_DBG_FAN, 7637 "fan control: set fan control register to 0x%02x\n", 7638 s); 7639 return rc; 7640} 7641 7642static int fan_set_disable(void) 7643{ 7644 int rc; 7645 7646 if (!fan_control_allowed) 7647 return -EPERM; 7648 7649 if (mutex_lock_killable(&fan_mutex)) 7650 return -ERESTARTSYS; 7651 7652 rc = 0; 7653 switch (fan_control_access_mode) { 7654 case TPACPI_FAN_WR_ACPI_FANS: 7655 case TPACPI_FAN_WR_TPEC: 7656 if (!acpi_ec_write(fan_status_offset, 0x00)) 7657 rc = -EIO; 7658 else { 7659 fan_control_desired_level = 0; 7660 tp_features.fan_ctrl_status_undef = 0; 7661 } 7662 break; 7663 7664 case TPACPI_FAN_WR_ACPI_SFAN: 7665 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 7666 rc = -EIO; 7667 else 7668 fan_control_desired_level = 0; 7669 break; 7670 7671 default: 7672 rc = -ENXIO; 7673 } 7674 7675 if (!rc) 7676 vdbg_printk(TPACPI_DBG_FAN, 7677 "fan control: set fan control register to 0\n"); 7678 7679 mutex_unlock(&fan_mutex); 7680 return rc; 7681} 7682 7683static int fan_set_speed(int speed) 7684{ 7685 int rc; 7686 7687 if (!fan_control_allowed) 7688 return -EPERM; 7689 7690 if (mutex_lock_killable(&fan_mutex)) 7691 return -ERESTARTSYS; 7692 7693 rc = 0; 7694 switch (fan_control_access_mode) { 7695 case TPACPI_FAN_WR_ACPI_FANS: 7696 if (speed >= 0 && speed <= 65535) { 7697 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 7698 speed, speed, speed)) 7699 rc = -EIO; 7700 } else 7701 rc = -EINVAL; 7702 break; 7703 7704 default: 7705 rc = -ENXIO; 7706 } 7707 7708 mutex_unlock(&fan_mutex); 7709 return rc; 7710} 7711 7712static void fan_watchdog_reset(void) 7713{ 7714 static int fan_watchdog_active; 7715 7716 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 7717 return; 7718 7719 if (fan_watchdog_active) 7720 cancel_delayed_work(&fan_watchdog_task); 7721 7722 if (fan_watchdog_maxinterval > 0 && 7723 tpacpi_lifecycle != TPACPI_LIFE_EXITING) { 7724 fan_watchdog_active = 1; 7725 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task, 7726 msecs_to_jiffies(fan_watchdog_maxinterval 7727 * 1000))) { 7728 printk(TPACPI_ERR 7729 "failed to queue the fan watchdog, " 7730 "watchdog will not trigger\n"); 7731 } 7732 } else 7733 fan_watchdog_active = 0; 7734} 7735 7736static void fan_watchdog_fire(struct work_struct *ignored) 7737{ 7738 int rc; 7739 7740 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 7741 return; 7742 7743 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n"); 7744 rc = fan_set_enable(); 7745 if (rc < 0) { 7746 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, " 7747 "will try again later...\n", -rc); 7748 /* reschedule for later */ 7749 fan_watchdog_reset(); 7750 } 7751} 7752 7753/* 7754 * SYSFS fan layout: hwmon compatible (device) 7755 * 7756 * pwm*_enable: 7757 * 0: "disengaged" mode 7758 * 1: manual mode 7759 * 2: native EC "auto" mode (recommended, hardware default) 7760 * 7761 * pwm*: set speed in manual mode, ignored otherwise. 7762 * 0 is level 0; 255 is level 7. Intermediate points done with linear 7763 * interpolation. 7764 * 7765 * fan*_input: tachometer reading, RPM 7766 * 7767 * 7768 * SYSFS fan layout: extensions 7769 * 7770 * fan_watchdog (driver): 7771 * fan watchdog interval in seconds, 0 disables (default), max 120 7772 */ 7773 7774/* sysfs fan pwm1_enable ----------------------------------------------- */ 7775static ssize_t fan_pwm1_enable_show(struct device *dev, 7776 struct device_attribute *attr, 7777 char *buf) 7778{ 7779 int res, mode; 7780 u8 status; 7781 7782 res = fan_get_status_safe(&status); 7783 if (res) 7784 return res; 7785 7786 if (status & TP_EC_FAN_FULLSPEED) { 7787 mode = 0; 7788 } else if (status & TP_EC_FAN_AUTO) { 7789 mode = 2; 7790 } else 7791 mode = 1; 7792 7793 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 7794} 7795 7796static ssize_t fan_pwm1_enable_store(struct device *dev, 7797 struct device_attribute *attr, 7798 const char *buf, size_t count) 7799{ 7800 unsigned long t; 7801 int res, level; 7802 7803 if (parse_strtoul(buf, 2, &t)) 7804 return -EINVAL; 7805 7806 tpacpi_disclose_usertask("hwmon pwm1_enable", 7807 "set fan mode to %lu\n", t); 7808 7809 switch (t) { 7810 case 0: 7811 level = TP_EC_FAN_FULLSPEED; 7812 break; 7813 case 1: 7814 level = TPACPI_FAN_LAST_LEVEL; 7815 break; 7816 case 2: 7817 level = TP_EC_FAN_AUTO; 7818 break; 7819 case 3: 7820 /* reserved for software-controlled auto mode */ 7821 return -ENOSYS; 7822 default: 7823 return -EINVAL; 7824 } 7825 7826 res = fan_set_level_safe(level); 7827 if (res == -ENXIO) 7828 return -EINVAL; 7829 else if (res < 0) 7830 return res; 7831 7832 fan_watchdog_reset(); 7833 7834 return count; 7835} 7836 7837static struct device_attribute dev_attr_fan_pwm1_enable = 7838 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 7839 fan_pwm1_enable_show, fan_pwm1_enable_store); 7840 7841/* sysfs fan pwm1 ------------------------------------------------------ */ 7842static ssize_t fan_pwm1_show(struct device *dev, 7843 struct device_attribute *attr, 7844 char *buf) 7845{ 7846 int res; 7847 u8 status; 7848 7849 res = fan_get_status_safe(&status); 7850 if (res) 7851 return res; 7852 7853 if ((status & 7854 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 7855 status = fan_control_desired_level; 7856 7857 if (status > 7) 7858 status = 7; 7859 7860 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 7861} 7862 7863static ssize_t fan_pwm1_store(struct device *dev, 7864 struct device_attribute *attr, 7865 const char *buf, size_t count) 7866{ 7867 unsigned long s; 7868 int rc; 7869 u8 status, newlevel; 7870 7871 if (parse_strtoul(buf, 255, &s)) 7872 return -EINVAL; 7873 7874 tpacpi_disclose_usertask("hwmon pwm1", 7875 "set fan speed to %lu\n", s); 7876 7877 /* scale down from 0-255 to 0-7 */ 7878 newlevel = (s >> 5) & 0x07; 7879 7880 if (mutex_lock_killable(&fan_mutex)) 7881 return -ERESTARTSYS; 7882 7883 rc = fan_get_status(&status); 7884 if (!rc && (status & 7885 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7886 rc = fan_set_level(newlevel); 7887 if (rc == -ENXIO) 7888 rc = -EINVAL; 7889 else if (!rc) { 7890 fan_update_desired_level(newlevel); 7891 fan_watchdog_reset(); 7892 } 7893 } 7894 7895 mutex_unlock(&fan_mutex); 7896 return (rc)? rc : count; 7897} 7898 7899static struct device_attribute dev_attr_fan_pwm1 = 7900 __ATTR(pwm1, S_IWUSR | S_IRUGO, 7901 fan_pwm1_show, fan_pwm1_store); 7902 7903/* sysfs fan fan1_input ------------------------------------------------ */ 7904static ssize_t fan_fan1_input_show(struct device *dev, 7905 struct device_attribute *attr, 7906 char *buf) 7907{ 7908 int res; 7909 unsigned int speed; 7910 7911 res = fan_get_speed(&speed); 7912 if (res < 0) 7913 return res; 7914 7915 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7916} 7917 7918static struct device_attribute dev_attr_fan_fan1_input = 7919 __ATTR(fan1_input, S_IRUGO, 7920 fan_fan1_input_show, NULL); 7921 7922/* sysfs fan fan2_input ------------------------------------------------ */ 7923static ssize_t fan_fan2_input_show(struct device *dev, 7924 struct device_attribute *attr, 7925 char *buf) 7926{ 7927 int res; 7928 unsigned int speed; 7929 7930 res = fan2_get_speed(&speed); 7931 if (res < 0) 7932 return res; 7933 7934 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7935} 7936 7937static struct device_attribute dev_attr_fan_fan2_input = 7938 __ATTR(fan2_input, S_IRUGO, 7939 fan_fan2_input_show, NULL); 7940 7941/* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 7942static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 7943 char *buf) 7944{ 7945 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 7946} 7947 7948static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 7949 const char *buf, size_t count) 7950{ 7951 unsigned long t; 7952 7953 if (parse_strtoul(buf, 120, &t)) 7954 return -EINVAL; 7955 7956 if (!fan_control_allowed) 7957 return -EPERM; 7958 7959 fan_watchdog_maxinterval = t; 7960 fan_watchdog_reset(); 7961 7962 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 7963 7964 return count; 7965} 7966 7967static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 7968 fan_fan_watchdog_show, fan_fan_watchdog_store); 7969 7970/* --------------------------------------------------------------------- */ 7971static struct attribute *fan_attributes[] = { 7972 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr, 7973 &dev_attr_fan_fan1_input.attr, 7974 NULL, /* for fan2_input */ 7975 NULL 7976}; 7977 7978static const struct attribute_group fan_attr_group = { 7979 .attrs = fan_attributes, 7980}; 7981 7982#define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 7983#define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 7984 7985#define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 7986 { .vendor = PCI_VENDOR_ID_IBM, \ 7987 .bios = TPACPI_MATCH_ANY, \ 7988 .ec = TPID(__id1, __id2), \ 7989 .quirks = __quirks } 7990 7991#define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 7992 { .vendor = PCI_VENDOR_ID_LENOVO, \ 7993 .bios = TPACPI_MATCH_ANY, \ 7994 .ec = TPID(__id1, __id2), \ 7995 .quirks = __quirks } 7996 7997static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 7998 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 7999 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 8000 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 8001 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 8002 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 8003}; 8004 8005#undef TPACPI_FAN_QL 8006#undef TPACPI_FAN_QI 8007 8008static int __init fan_init(struct ibm_init_struct *iibm) 8009{ 8010 int rc; 8011 unsigned long quirks; 8012 8013 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8014 "initializing fan subdriver\n"); 8015 8016 mutex_init(&fan_mutex); 8017 fan_status_access_mode = TPACPI_FAN_NONE; 8018 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8019 fan_control_commands = 0; 8020 fan_watchdog_maxinterval = 0; 8021 tp_features.fan_ctrl_status_undef = 0; 8022 tp_features.second_fan = 0; 8023 fan_control_desired_level = 7; 8024 8025 if (tpacpi_is_ibm()) { 8026 TPACPI_ACPIHANDLE_INIT(fans); 8027 TPACPI_ACPIHANDLE_INIT(gfan); 8028 TPACPI_ACPIHANDLE_INIT(sfan); 8029 } 8030 8031 quirks = tpacpi_check_quirks(fan_quirk_table, 8032 ARRAY_SIZE(fan_quirk_table)); 8033 8034 if (gfan_handle) { 8035 /* 570, 600e/x, 770e, 770x */ 8036 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8037 } else { 8038 /* all other ThinkPads: note that even old-style 8039 * ThinkPad ECs supports the fan control register */ 8040 if (likely(acpi_ec_read(fan_status_offset, 8041 &fan_control_initial_status))) { 8042 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8043 if (quirks & TPACPI_FAN_Q1) 8044 fan_quirk1_setup(); 8045 if (quirks & TPACPI_FAN_2FAN) { 8046 tp_features.second_fan = 1; 8047 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8048 "secondary fan support enabled\n"); 8049 } 8050 } else { 8051 printk(TPACPI_ERR 8052 "ThinkPad ACPI EC access misbehaving, " 8053 "fan status and control unavailable\n"); 8054 return 1; 8055 } 8056 } 8057 8058 if (sfan_handle) { 8059 /* 570, 770x-JL */ 8060 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8061 fan_control_commands |= 8062 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8063 } else { 8064 if (!gfan_handle) { 8065 /* gfan without sfan means no fan control */ 8066 /* all other models implement TP EC 0x2f control */ 8067 8068 if (fans_handle) { 8069 /* X31, X40, X41 */ 8070 fan_control_access_mode = 8071 TPACPI_FAN_WR_ACPI_FANS; 8072 fan_control_commands |= 8073 TPACPI_FAN_CMD_SPEED | 8074 TPACPI_FAN_CMD_LEVEL | 8075 TPACPI_FAN_CMD_ENABLE; 8076 } else { 8077 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8078 fan_control_commands |= 8079 TPACPI_FAN_CMD_LEVEL | 8080 TPACPI_FAN_CMD_ENABLE; 8081 } 8082 } 8083 } 8084 8085 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8086 "fan is %s, modes %d, %d\n", 8087 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8088 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8089 fan_status_access_mode, fan_control_access_mode); 8090 8091 /* fan control master switch */ 8092 if (!fan_control_allowed) { 8093 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8094 fan_control_commands = 0; 8095 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8096 "fan control features disabled by parameter\n"); 8097 } 8098 8099 /* update fan_control_desired_level */ 8100 if (fan_status_access_mode != TPACPI_FAN_NONE) 8101 fan_get_status_safe(NULL); 8102 8103 if (fan_status_access_mode != TPACPI_FAN_NONE || 8104 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8105 if (tp_features.second_fan) { 8106 /* attach second fan tachometer */ 8107 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8108 &dev_attr_fan_fan2_input.attr; 8109 } 8110 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8111 &fan_attr_group); 8112 if (rc < 0) 8113 return rc; 8114 8115 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8116 &driver_attr_fan_watchdog); 8117 if (rc < 0) { 8118 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8119 &fan_attr_group); 8120 return rc; 8121 } 8122 return 0; 8123 } else 8124 return 1; 8125} 8126 8127static void fan_exit(void) 8128{ 8129 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8130 "cancelling any pending fan watchdog tasks\n"); 8131 8132 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8133 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8134 &driver_attr_fan_watchdog); 8135 8136 cancel_delayed_work(&fan_watchdog_task); 8137 flush_workqueue(tpacpi_wq); 8138} 8139 8140static void fan_suspend(pm_message_t state) 8141{ 8142 int rc; 8143 8144 if (!fan_control_allowed) 8145 return; 8146 8147 /* Store fan status in cache */ 8148 fan_control_resume_level = 0; 8149 rc = fan_get_status_safe(&fan_control_resume_level); 8150 if (rc < 0) 8151 printk(TPACPI_NOTICE 8152 "failed to read fan level for later " 8153 "restore during resume: %d\n", rc); 8154 8155 /* if it is undefined, don't attempt to restore it. 8156 * KEEP THIS LAST */ 8157 if (tp_features.fan_ctrl_status_undef) 8158 fan_control_resume_level = 0; 8159} 8160 8161static void fan_resume(void) 8162{ 8163 u8 current_level = 7; 8164 bool do_set = false; 8165 int rc; 8166 8167 /* DSDT *always* updates status on resume */ 8168 tp_features.fan_ctrl_status_undef = 0; 8169 8170 if (!fan_control_allowed || 8171 !fan_control_resume_level || 8172 (fan_get_status_safe(¤t_level) < 0)) 8173 return; 8174 8175 switch (fan_control_access_mode) { 8176 case TPACPI_FAN_WR_ACPI_SFAN: 8177 /* never decrease fan level */ 8178 do_set = (fan_control_resume_level > current_level); 8179 break; 8180 case TPACPI_FAN_WR_ACPI_FANS: 8181 case TPACPI_FAN_WR_TPEC: 8182 /* never decrease fan level, scale is: 8183 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8184 * 8185 * We expect the firmware to set either 7 or AUTO, but we 8186 * handle FULLSPEED out of paranoia. 8187 * 8188 * So, we can safely only restore FULLSPEED or 7, anything 8189 * else could slow the fan. Restoring AUTO is useless, at 8190 * best that's exactly what the DSDT already set (it is the 8191 * slower it uses). 8192 * 8193 * Always keep in mind that the DSDT *will* have set the 8194 * fans to what the vendor supposes is the best level. We 8195 * muck with it only to speed the fan up. 8196 */ 8197 if (fan_control_resume_level != 7 && 8198 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8199 return; 8200 else 8201 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8202 (current_level != fan_control_resume_level); 8203 break; 8204 default: 8205 return; 8206 } 8207 if (do_set) { 8208 printk(TPACPI_NOTICE 8209 "restoring fan level to 0x%02x\n", 8210 fan_control_resume_level); 8211 rc = fan_set_level_safe(fan_control_resume_level); 8212 if (rc < 0) 8213 printk(TPACPI_NOTICE 8214 "failed to restore fan level: %d\n", rc); 8215 } 8216} 8217 8218static int fan_read(struct seq_file *m) 8219{ 8220 int rc; 8221 u8 status; 8222 unsigned int speed = 0; 8223 8224 switch (fan_status_access_mode) { 8225 case TPACPI_FAN_RD_ACPI_GFAN: 8226 /* 570, 600e/x, 770e, 770x */ 8227 rc = fan_get_status_safe(&status); 8228 if (rc < 0) 8229 return rc; 8230 8231 seq_printf(m, "status:\t\t%s\n" 8232 "level:\t\t%d\n", 8233 (status != 0) ? "enabled" : "disabled", status); 8234 break; 8235 8236 case TPACPI_FAN_RD_TPEC: 8237 /* all except 570, 600e/x, 770e, 770x */ 8238 rc = fan_get_status_safe(&status); 8239 if (rc < 0) 8240 return rc; 8241 8242 seq_printf(m, "status:\t\t%s\n", 8243 (status != 0) ? "enabled" : "disabled"); 8244 8245 rc = fan_get_speed(&speed); 8246 if (rc < 0) 8247 return rc; 8248 8249 seq_printf(m, "speed:\t\t%d\n", speed); 8250 8251 if (status & TP_EC_FAN_FULLSPEED) 8252 /* Disengaged mode takes precedence */ 8253 seq_printf(m, "level:\t\tdisengaged\n"); 8254 else if (status & TP_EC_FAN_AUTO) 8255 seq_printf(m, "level:\t\tauto\n"); 8256 else 8257 seq_printf(m, "level:\t\t%d\n", status); 8258 break; 8259 8260 case TPACPI_FAN_NONE: 8261 default: 8262 seq_printf(m, "status:\t\tnot supported\n"); 8263 } 8264 8265 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8266 seq_printf(m, "commands:\tlevel <level>"); 8267 8268 switch (fan_control_access_mode) { 8269 case TPACPI_FAN_WR_ACPI_SFAN: 8270 seq_printf(m, " (<level> is 0-7)\n"); 8271 break; 8272 8273 default: 8274 seq_printf(m, " (<level> is 0-7, " 8275 "auto, disengaged, full-speed)\n"); 8276 break; 8277 } 8278 } 8279 8280 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8281 seq_printf(m, "commands:\tenable, disable\n" 8282 "commands:\twatchdog <timeout> (<timeout> " 8283 "is 0 (off), 1-120 (seconds))\n"); 8284 8285 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8286 seq_printf(m, "commands:\tspeed <speed>" 8287 " (<speed> is 0-65535)\n"); 8288 8289 return 0; 8290} 8291 8292static int fan_write_cmd_level(const char *cmd, int *rc) 8293{ 8294 int level; 8295 8296 if (strlencmp(cmd, "level auto") == 0) 8297 level = TP_EC_FAN_AUTO; 8298 else if ((strlencmp(cmd, "level disengaged") == 0) | 8299 (strlencmp(cmd, "level full-speed") == 0)) 8300 level = TP_EC_FAN_FULLSPEED; 8301 else if (sscanf(cmd, "level %d", &level) != 1) 8302 return 0; 8303 8304 *rc = fan_set_level_safe(level); 8305 if (*rc == -ENXIO) 8306 printk(TPACPI_ERR "level command accepted for unsupported " 8307 "access mode %d", fan_control_access_mode); 8308 else if (!*rc) 8309 tpacpi_disclose_usertask("procfs fan", 8310 "set level to %d\n", level); 8311 8312 return 1; 8313} 8314 8315static int fan_write_cmd_enable(const char *cmd, int *rc) 8316{ 8317 if (strlencmp(cmd, "enable") != 0) 8318 return 0; 8319 8320 *rc = fan_set_enable(); 8321 if (*rc == -ENXIO) 8322 printk(TPACPI_ERR "enable command accepted for unsupported " 8323 "access mode %d", fan_control_access_mode); 8324 else if (!*rc) 8325 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8326 8327 return 1; 8328} 8329 8330static int fan_write_cmd_disable(const char *cmd, int *rc) 8331{ 8332 if (strlencmp(cmd, "disable") != 0) 8333 return 0; 8334 8335 *rc = fan_set_disable(); 8336 if (*rc == -ENXIO) 8337 printk(TPACPI_ERR "disable command accepted for unsupported " 8338 "access mode %d", fan_control_access_mode); 8339 else if (!*rc) 8340 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8341 8342 return 1; 8343} 8344 8345static int fan_write_cmd_speed(const char *cmd, int *rc) 8346{ 8347 int speed; 8348 8349 /* TODO: 8350 * Support speed <low> <medium> <high> ? */ 8351 8352 if (sscanf(cmd, "speed %d", &speed) != 1) 8353 return 0; 8354 8355 *rc = fan_set_speed(speed); 8356 if (*rc == -ENXIO) 8357 printk(TPACPI_ERR "speed command accepted for unsupported " 8358 "access mode %d", fan_control_access_mode); 8359 else if (!*rc) 8360 tpacpi_disclose_usertask("procfs fan", 8361 "set speed to %d\n", speed); 8362 8363 return 1; 8364} 8365 8366static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8367{ 8368 int interval; 8369 8370 if (sscanf(cmd, "watchdog %d", &interval) != 1) 8371 return 0; 8372 8373 if (interval < 0 || interval > 120) 8374 *rc = -EINVAL; 8375 else { 8376 fan_watchdog_maxinterval = interval; 8377 tpacpi_disclose_usertask("procfs fan", 8378 "set watchdog timer to %d\n", 8379 interval); 8380 } 8381 8382 return 1; 8383} 8384 8385static int fan_write(char *buf) 8386{ 8387 char *cmd; 8388 int rc = 0; 8389 8390 while (!rc && (cmd = next_cmd(&buf))) { 8391 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 8392 fan_write_cmd_level(cmd, &rc)) && 8393 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 8394 (fan_write_cmd_enable(cmd, &rc) || 8395 fan_write_cmd_disable(cmd, &rc) || 8396 fan_write_cmd_watchdog(cmd, &rc))) && 8397 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 8398 fan_write_cmd_speed(cmd, &rc)) 8399 ) 8400 rc = -EINVAL; 8401 else if (!rc) 8402 fan_watchdog_reset(); 8403 } 8404 8405 return rc; 8406} 8407 8408static struct ibm_struct fan_driver_data = { 8409 .name = "fan", 8410 .read = fan_read, 8411 .write = fan_write, 8412 .exit = fan_exit, 8413 .suspend = fan_suspend, 8414 .resume = fan_resume, 8415}; 8416 8417/**************************************************************************** 8418 **************************************************************************** 8419 * 8420 * Infrastructure 8421 * 8422 **************************************************************************** 8423 ****************************************************************************/ 8424 8425/* 8426 * HKEY event callout for other subdrivers go here 8427 * (yes, it is ugly, but it is quick, safe, and gets the job done 8428 */ 8429static void tpacpi_driver_event(const unsigned int hkey_event) 8430{ 8431 if (ibm_backlight_device) { 8432 switch (hkey_event) { 8433 case TP_HKEY_EV_BRGHT_UP: 8434 case TP_HKEY_EV_BRGHT_DOWN: 8435 tpacpi_brightness_notify_change(); 8436 } 8437 } 8438 if (alsa_card) { 8439 switch (hkey_event) { 8440 case TP_HKEY_EV_VOL_UP: 8441 case TP_HKEY_EV_VOL_DOWN: 8442 case TP_HKEY_EV_VOL_MUTE: 8443 volume_alsa_notify_change(); 8444 } 8445 } 8446} 8447 8448static void hotkey_driver_event(const unsigned int scancode) 8449{ 8450 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 8451} 8452 8453/* sysfs name ---------------------------------------------------------- */ 8454static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 8455 struct device_attribute *attr, 8456 char *buf) 8457{ 8458 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 8459} 8460 8461static struct device_attribute dev_attr_thinkpad_acpi_pdev_name = 8462 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 8463 8464/* --------------------------------------------------------------------- */ 8465 8466/* /proc support */ 8467static struct proc_dir_entry *proc_dir; 8468 8469/* 8470 * Module and infrastructure proble, init and exit handling 8471 */ 8472 8473static int force_load; 8474 8475#ifdef CONFIG_THINKPAD_ACPI_DEBUG 8476static const char * __init str_supported(int is_supported) 8477{ 8478 static char text_unsupported[] __initdata = "not supported"; 8479 8480 return (is_supported)? &text_unsupported[4] : &text_unsupported[0]; 8481} 8482#endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 8483 8484static void ibm_exit(struct ibm_struct *ibm) 8485{ 8486 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 8487 8488 list_del_init(&ibm->all_drivers); 8489 8490 if (ibm->flags.acpi_notify_installed) { 8491 dbg_printk(TPACPI_DBG_EXIT, 8492 "%s: acpi_remove_notify_handler\n", ibm->name); 8493 BUG_ON(!ibm->acpi); 8494 acpi_remove_notify_handler(*ibm->acpi->handle, 8495 ibm->acpi->type, 8496 dispatch_acpi_notify); 8497 ibm->flags.acpi_notify_installed = 0; 8498 ibm->flags.acpi_notify_installed = 0; 8499 } 8500 8501 if (ibm->flags.proc_created) { 8502 dbg_printk(TPACPI_DBG_EXIT, 8503 "%s: remove_proc_entry\n", ibm->name); 8504 remove_proc_entry(ibm->name, proc_dir); 8505 ibm->flags.proc_created = 0; 8506 } 8507 8508 if (ibm->flags.acpi_driver_registered) { 8509 dbg_printk(TPACPI_DBG_EXIT, 8510 "%s: acpi_bus_unregister_driver\n", ibm->name); 8511 BUG_ON(!ibm->acpi); 8512 acpi_bus_unregister_driver(ibm->acpi->driver); 8513 kfree(ibm->acpi->driver); 8514 ibm->acpi->driver = NULL; 8515 ibm->flags.acpi_driver_registered = 0; 8516 } 8517 8518 if (ibm->flags.init_called && ibm->exit) { 8519 ibm->exit(); 8520 ibm->flags.init_called = 0; 8521 } 8522 8523 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 8524} 8525 8526static int __init ibm_init(struct ibm_init_struct *iibm) 8527{ 8528 int ret; 8529 struct ibm_struct *ibm = iibm->data; 8530 struct proc_dir_entry *entry; 8531 8532 BUG_ON(ibm == NULL); 8533 8534 INIT_LIST_HEAD(&ibm->all_drivers); 8535 8536 if (ibm->flags.experimental && !experimental) 8537 return 0; 8538 8539 dbg_printk(TPACPI_DBG_INIT, 8540 "probing for %s\n", ibm->name); 8541 8542 if (iibm->init) { 8543 ret = iibm->init(iibm); 8544 if (ret > 0) 8545 return 0; /* probe failed */ 8546 if (ret) 8547 return ret; 8548 8549 ibm->flags.init_called = 1; 8550 } 8551 8552 if (ibm->acpi) { 8553 if (ibm->acpi->hid) { 8554 ret = register_tpacpi_subdriver(ibm); 8555 if (ret) 8556 goto err_out; 8557 } 8558 8559 if (ibm->acpi->notify) { 8560 ret = setup_acpi_notify(ibm); 8561 if (ret == -ENODEV) { 8562 printk(TPACPI_NOTICE "disabling subdriver %s\n", 8563 ibm->name); 8564 ret = 0; 8565 goto err_out; 8566 } 8567 if (ret < 0) 8568 goto err_out; 8569 } 8570 } 8571 8572 dbg_printk(TPACPI_DBG_INIT, 8573 "%s installed\n", ibm->name); 8574 8575 if (ibm->read) { 8576 mode_t mode = iibm->base_procfs_mode; 8577 8578 if (!mode) 8579 mode = S_IRUGO; 8580 if (ibm->write) 8581 mode |= S_IWUSR; 8582 entry = proc_create_data(ibm->name, mode, proc_dir, 8583 &dispatch_proc_fops, ibm); 8584 if (!entry) { 8585 printk(TPACPI_ERR "unable to create proc entry %s\n", 8586 ibm->name); 8587 ret = -ENODEV; 8588 goto err_out; 8589 } 8590 ibm->flags.proc_created = 1; 8591 } 8592 8593 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 8594 8595 return 0; 8596 8597err_out: 8598 dbg_printk(TPACPI_DBG_INIT, 8599 "%s: at error exit path with result %d\n", 8600 ibm->name, ret); 8601 8602 ibm_exit(ibm); 8603 return (ret < 0)? ret : 0; 8604} 8605 8606/* Probing */ 8607 8608static bool __pure __init tpacpi_is_fw_digit(const char c) 8609{ 8610 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 8611} 8612 8613/* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */ 8614static bool __pure __init tpacpi_is_valid_fw_id(const char* const s, 8615 const char t) 8616{ 8617 return s && strlen(s) >= 8 && 8618 tpacpi_is_fw_digit(s[0]) && 8619 tpacpi_is_fw_digit(s[1]) && 8620 s[2] == t && s[3] == 'T' && 8621 tpacpi_is_fw_digit(s[4]) && 8622 tpacpi_is_fw_digit(s[5]) && 8623 s[6] == 'W' && s[7] == 'W'; 8624} 8625 8626/* returns 0 - probe ok, or < 0 - probe error. 8627 * Probe ok doesn't mean thinkpad found. 8628 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 8629static int __must_check __init get_thinkpad_model_data( 8630 struct thinkpad_id_data *tp) 8631{ 8632 const struct dmi_device *dev = NULL; 8633 char ec_fw_string[18]; 8634 char const *s; 8635 8636 if (!tp) 8637 return -EINVAL; 8638 8639 memset(tp, 0, sizeof(*tp)); 8640 8641 if (dmi_name_in_vendors("IBM")) 8642 tp->vendor = PCI_VENDOR_ID_IBM; 8643 else if (dmi_name_in_vendors("LENOVO")) 8644 tp->vendor = PCI_VENDOR_ID_LENOVO; 8645 else 8646 return 0; 8647 8648 s = dmi_get_system_info(DMI_BIOS_VERSION); 8649 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 8650 if (s && !tp->bios_version_str) 8651 return -ENOMEM; 8652 8653 /* Really ancient ThinkPad 240X will fail this, which is fine */ 8654 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E')) 8655 return 0; 8656 8657 tp->bios_model = tp->bios_version_str[0] 8658 | (tp->bios_version_str[1] << 8); 8659 tp->bios_release = (tp->bios_version_str[4] << 8) 8660 | tp->bios_version_str[5]; 8661 8662 /* 8663 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 8664 * X32 or newer, all Z series; Some models must have an 8665 * up-to-date BIOS or they will not be detected. 8666 * 8667 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 8668 */ 8669 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 8670 if (sscanf(dev->name, 8671 "IBM ThinkPad Embedded Controller -[%17c", 8672 ec_fw_string) == 1) { 8673 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 8674 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 8675 8676 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 8677 if (!tp->ec_version_str) 8678 return -ENOMEM; 8679 8680 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 8681 tp->ec_model = ec_fw_string[0] 8682 | (ec_fw_string[1] << 8); 8683 tp->ec_release = (ec_fw_string[4] << 8) 8684 | ec_fw_string[5]; 8685 } else { 8686 printk(TPACPI_NOTICE 8687 "ThinkPad firmware release %s " 8688 "doesn't match the known patterns\n", 8689 ec_fw_string); 8690 printk(TPACPI_NOTICE 8691 "please report this to %s\n", 8692 TPACPI_MAIL); 8693 } 8694 break; 8695 } 8696 } 8697 8698 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 8699 if (s && !strnicmp(s, "ThinkPad", 8)) { 8700 tp->model_str = kstrdup(s, GFP_KERNEL); 8701 if (!tp->model_str) 8702 return -ENOMEM; 8703 } 8704 8705 s = dmi_get_system_info(DMI_PRODUCT_NAME); 8706 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 8707 if (s && !tp->nummodel_str) 8708 return -ENOMEM; 8709 8710 return 0; 8711} 8712 8713static int __init probe_for_thinkpad(void) 8714{ 8715 int is_thinkpad; 8716 8717 if (acpi_disabled) 8718 return -ENODEV; 8719 8720 /* It would be dangerous to run the driver in this case */ 8721 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 8722 return -ENODEV; 8723 8724 /* 8725 * Non-ancient models have better DMI tagging, but very old models 8726 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 8727 */ 8728 is_thinkpad = (thinkpad_id.model_str != NULL) || 8729 (thinkpad_id.ec_model != 0) || 8730 tpacpi_is_fw_known(); 8731 8732 /* The EC handler is required */ 8733 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 8734 if (!ec_handle) { 8735 if (is_thinkpad) 8736 printk(TPACPI_ERR 8737 "Not yet supported ThinkPad detected!\n"); 8738 return -ENODEV; 8739 } 8740 8741 if (!is_thinkpad && !force_load) 8742 return -ENODEV; 8743 8744 return 0; 8745} 8746 8747static void __init thinkpad_acpi_init_banner(void) 8748{ 8749 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 8750 printk(TPACPI_INFO "%s\n", TPACPI_URL); 8751 8752 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n", 8753 (thinkpad_id.bios_version_str) ? 8754 thinkpad_id.bios_version_str : "unknown", 8755 (thinkpad_id.ec_version_str) ? 8756 thinkpad_id.ec_version_str : "unknown"); 8757 8758 BUG_ON(!thinkpad_id.vendor); 8759 8760 if (thinkpad_id.model_str) 8761 printk(TPACPI_INFO "%s %s, model %s\n", 8762 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 8763 "IBM" : ((thinkpad_id.vendor == 8764 PCI_VENDOR_ID_LENOVO) ? 8765 "Lenovo" : "Unknown vendor"), 8766 thinkpad_id.model_str, 8767 (thinkpad_id.nummodel_str) ? 8768 thinkpad_id.nummodel_str : "unknown"); 8769} 8770 8771/* Module init, exit, parameters */ 8772 8773static struct ibm_init_struct ibms_init[] __initdata = { 8774 { 8775 .data = &thinkpad_acpi_driver_data, 8776 }, 8777 { 8778 .init = hotkey_init, 8779 .data = &hotkey_driver_data, 8780 }, 8781 { 8782 .init = bluetooth_init, 8783 .data = &bluetooth_driver_data, 8784 }, 8785 { 8786 .init = wan_init, 8787 .data = &wan_driver_data, 8788 }, 8789 { 8790 .init = uwb_init, 8791 .data = &uwb_driver_data, 8792 }, 8793#ifdef CONFIG_THINKPAD_ACPI_VIDEO 8794 { 8795 .init = video_init, 8796 .base_procfs_mode = S_IRUSR, 8797 .data = &video_driver_data, 8798 }, 8799#endif 8800 { 8801 .init = light_init, 8802 .data = &light_driver_data, 8803 }, 8804 { 8805 .init = cmos_init, 8806 .data = &cmos_driver_data, 8807 }, 8808 { 8809 .init = led_init, 8810 .data = &led_driver_data, 8811 }, 8812 { 8813 .init = beep_init, 8814 .data = &beep_driver_data, 8815 }, 8816 { 8817 .init = thermal_init, 8818 .data = &thermal_driver_data, 8819 }, 8820 { 8821 .init = brightness_init, 8822 .data = &brightness_driver_data, 8823 }, 8824 { 8825 .init = volume_init, 8826 .data = &volume_driver_data, 8827 }, 8828 { 8829 .init = fan_init, 8830 .data = &fan_driver_data, 8831 }, 8832}; 8833 8834static int __init set_ibm_param(const char *val, struct kernel_param *kp) 8835{ 8836 unsigned int i; 8837 struct ibm_struct *ibm; 8838 8839 if (!kp || !kp->name || !val) 8840 return -EINVAL; 8841 8842 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 8843 ibm = ibms_init[i].data; 8844 WARN_ON(ibm == NULL); 8845 8846 if (!ibm || !ibm->name) 8847 continue; 8848 8849 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 8850 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 8851 return -ENOSPC; 8852 strcpy(ibms_init[i].param, val); 8853 strcat(ibms_init[i].param, ","); 8854 return 0; 8855 } 8856 } 8857 8858 return -EINVAL; 8859} 8860 8861module_param(experimental, int, 0444); 8862MODULE_PARM_DESC(experimental, 8863 "Enables experimental features when non-zero"); 8864 8865module_param_named(debug, dbg_level, uint, 0); 8866MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 8867 8868module_param(force_load, bool, 0444); 8869MODULE_PARM_DESC(force_load, 8870 "Attempts to load the driver even on a " 8871 "mis-identified ThinkPad when true"); 8872 8873module_param_named(fan_control, fan_control_allowed, bool, 0444); 8874MODULE_PARM_DESC(fan_control, 8875 "Enables setting fan parameters features when true"); 8876 8877module_param_named(brightness_mode, brightness_mode, uint, 0444); 8878MODULE_PARM_DESC(brightness_mode, 8879 "Selects brightness control strategy: " 8880 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 8881 8882module_param(brightness_enable, uint, 0444); 8883MODULE_PARM_DESC(brightness_enable, 8884 "Enables backlight control when 1, disables when 0"); 8885 8886module_param(hotkey_report_mode, uint, 0444); 8887MODULE_PARM_DESC(hotkey_report_mode, 8888 "used for backwards compatibility with userspace, " 8889 "see documentation"); 8890 8891#ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 8892module_param_named(volume_mode, volume_mode, uint, 0444); 8893MODULE_PARM_DESC(volume_mode, 8894 "Selects volume control strategy: " 8895 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 8896 8897module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 8898MODULE_PARM_DESC(volume_capabilities, 8899 "Selects the mixer capabilites: " 8900 "0=auto, 1=volume and mute, 2=mute only"); 8901 8902module_param_named(volume_control, volume_control_allowed, bool, 0444); 8903MODULE_PARM_DESC(volume_control, 8904 "Enables software override for the console audio " 8905 "control when true"); 8906 8907/* ALSA module API parameters */ 8908module_param_named(index, alsa_index, int, 0444); 8909MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 8910module_param_named(id, alsa_id, charp, 0444); 8911MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 8912module_param_named(enable, alsa_enable, bool, 0444); 8913MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 8914#endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 8915 8916#define TPACPI_PARAM(feature) \ 8917 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 8918 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 8919 "at module load, see documentation") 8920 8921TPACPI_PARAM(hotkey); 8922TPACPI_PARAM(bluetooth); 8923TPACPI_PARAM(video); 8924TPACPI_PARAM(light); 8925TPACPI_PARAM(cmos); 8926TPACPI_PARAM(led); 8927TPACPI_PARAM(beep); 8928TPACPI_PARAM(brightness); 8929TPACPI_PARAM(volume); 8930TPACPI_PARAM(fan); 8931 8932#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 8933module_param(dbg_wlswemul, uint, 0444); 8934MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 8935module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 8936MODULE_PARM_DESC(wlsw_state, 8937 "Initial state of the emulated WLSW switch"); 8938 8939module_param(dbg_bluetoothemul, uint, 0444); 8940MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 8941module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 8942MODULE_PARM_DESC(bluetooth_state, 8943 "Initial state of the emulated bluetooth switch"); 8944 8945module_param(dbg_wwanemul, uint, 0444); 8946MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 8947module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 8948MODULE_PARM_DESC(wwan_state, 8949 "Initial state of the emulated WWAN switch"); 8950 8951module_param(dbg_uwbemul, uint, 0444); 8952MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 8953module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 8954MODULE_PARM_DESC(uwb_state, 8955 "Initial state of the emulated UWB switch"); 8956#endif 8957 8958static void thinkpad_acpi_module_exit(void) 8959{ 8960 struct ibm_struct *ibm, *itmp; 8961 8962 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 8963 8964 list_for_each_entry_safe_reverse(ibm, itmp, 8965 &tpacpi_all_drivers, 8966 all_drivers) { 8967 ibm_exit(ibm); 8968 } 8969 8970 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 8971 8972 if (tpacpi_inputdev) { 8973 if (tp_features.input_device_registered) 8974 input_unregister_device(tpacpi_inputdev); 8975 else 8976 input_free_device(tpacpi_inputdev); 8977 } 8978 8979 if (tpacpi_hwmon) 8980 hwmon_device_unregister(tpacpi_hwmon); 8981 8982 if (tp_features.sensors_pdev_attrs_registered) 8983 device_remove_file(&tpacpi_sensors_pdev->dev, 8984 &dev_attr_thinkpad_acpi_pdev_name); 8985 if (tpacpi_sensors_pdev) 8986 platform_device_unregister(tpacpi_sensors_pdev); 8987 if (tpacpi_pdev) 8988 platform_device_unregister(tpacpi_pdev); 8989 8990 if (tp_features.sensors_pdrv_attrs_registered) 8991 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 8992 if (tp_features.platform_drv_attrs_registered) 8993 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 8994 8995 if (tp_features.sensors_pdrv_registered) 8996 platform_driver_unregister(&tpacpi_hwmon_pdriver); 8997 8998 if (tp_features.platform_drv_registered) 8999 platform_driver_unregister(&tpacpi_pdriver); 9000 9001 if (proc_dir) 9002 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 9003 9004 if (tpacpi_wq) 9005 destroy_workqueue(tpacpi_wq); 9006 9007 kfree(thinkpad_id.bios_version_str); 9008 kfree(thinkpad_id.ec_version_str); 9009 kfree(thinkpad_id.model_str); 9010} 9011 9012 9013static int __init thinkpad_acpi_module_init(void) 9014{ 9015 int ret, i; 9016 9017 tpacpi_lifecycle = TPACPI_LIFE_INIT; 9018 9019 /* Parameter checking */ 9020 if (hotkey_report_mode > 2) 9021 return -EINVAL; 9022 9023 /* Driver-level probe */ 9024 9025 ret = get_thinkpad_model_data(&thinkpad_id); 9026 if (ret) { 9027 printk(TPACPI_ERR 9028 "unable to get DMI data: %d\n", ret); 9029 thinkpad_acpi_module_exit(); 9030 return ret; 9031 } 9032 ret = probe_for_thinkpad(); 9033 if (ret) { 9034 thinkpad_acpi_module_exit(); 9035 return ret; 9036 } 9037 9038 /* Driver initialization */ 9039 9040 thinkpad_acpi_init_banner(); 9041 tpacpi_check_outdated_fw(); 9042 9043 TPACPI_ACPIHANDLE_INIT(ecrd); 9044 TPACPI_ACPIHANDLE_INIT(ecwr); 9045 9046 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 9047 if (!tpacpi_wq) { 9048 thinkpad_acpi_module_exit(); 9049 return -ENOMEM; 9050 } 9051 9052 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 9053 if (!proc_dir) { 9054 printk(TPACPI_ERR 9055 "unable to create proc dir " TPACPI_PROC_DIR); 9056 thinkpad_acpi_module_exit(); 9057 return -ENODEV; 9058 } 9059 9060 ret = platform_driver_register(&tpacpi_pdriver); 9061 if (ret) { 9062 printk(TPACPI_ERR 9063 "unable to register main platform driver\n"); 9064 thinkpad_acpi_module_exit(); 9065 return ret; 9066 } 9067 tp_features.platform_drv_registered = 1; 9068 9069 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 9070 if (ret) { 9071 printk(TPACPI_ERR 9072 "unable to register hwmon platform driver\n"); 9073 thinkpad_acpi_module_exit(); 9074 return ret; 9075 } 9076 tp_features.sensors_pdrv_registered = 1; 9077 9078 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 9079 if (!ret) { 9080 tp_features.platform_drv_attrs_registered = 1; 9081 ret = tpacpi_create_driver_attributes( 9082 &tpacpi_hwmon_pdriver.driver); 9083 } 9084 if (ret) { 9085 printk(TPACPI_ERR 9086 "unable to create sysfs driver attributes\n"); 9087 thinkpad_acpi_module_exit(); 9088 return ret; 9089 } 9090 tp_features.sensors_pdrv_attrs_registered = 1; 9091 9092 9093 /* Device initialization */ 9094 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9095 NULL, 0); 9096 if (IS_ERR(tpacpi_pdev)) { 9097 ret = PTR_ERR(tpacpi_pdev); 9098 tpacpi_pdev = NULL; 9099 printk(TPACPI_ERR "unable to register platform device\n"); 9100 thinkpad_acpi_module_exit(); 9101 return ret; 9102 } 9103 tpacpi_sensors_pdev = platform_device_register_simple( 9104 TPACPI_HWMON_DRVR_NAME, 9105 -1, NULL, 0); 9106 if (IS_ERR(tpacpi_sensors_pdev)) { 9107 ret = PTR_ERR(tpacpi_sensors_pdev); 9108 tpacpi_sensors_pdev = NULL; 9109 printk(TPACPI_ERR 9110 "unable to register hwmon platform device\n"); 9111 thinkpad_acpi_module_exit(); 9112 return ret; 9113 } 9114 ret = device_create_file(&tpacpi_sensors_pdev->dev, 9115 &dev_attr_thinkpad_acpi_pdev_name); 9116 if (ret) { 9117 printk(TPACPI_ERR 9118 "unable to create sysfs hwmon device attributes\n"); 9119 thinkpad_acpi_module_exit(); 9120 return ret; 9121 } 9122 tp_features.sensors_pdev_attrs_registered = 1; 9123 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9124 if (IS_ERR(tpacpi_hwmon)) { 9125 ret = PTR_ERR(tpacpi_hwmon); 9126 tpacpi_hwmon = NULL; 9127 printk(TPACPI_ERR "unable to register hwmon device\n"); 9128 thinkpad_acpi_module_exit(); 9129 return ret; 9130 } 9131 mutex_init(&tpacpi_inputdev_send_mutex); 9132 tpacpi_inputdev = input_allocate_device(); 9133 if (!tpacpi_inputdev) { 9134 printk(TPACPI_ERR "unable to allocate input device\n"); 9135 thinkpad_acpi_module_exit(); 9136 return -ENOMEM; 9137 } else { 9138 /* Prepare input device, but don't register */ 9139 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9140 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9141 tpacpi_inputdev->id.bustype = BUS_HOST; 9142 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9143 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9144 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9145 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9146 } 9147 9148 /* Init subdriver dependencies */ 9149 tpacpi_detect_brightness_capabilities(); 9150 9151 /* Init subdrivers */ 9152 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9153 ret = ibm_init(&ibms_init[i]); 9154 if (ret >= 0 && *ibms_init[i].param) 9155 ret = ibms_init[i].data->write(ibms_init[i].param); 9156 if (ret < 0) { 9157 thinkpad_acpi_module_exit(); 9158 return ret; 9159 } 9160 } 9161 9162 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9163 9164 ret = input_register_device(tpacpi_inputdev); 9165 if (ret < 0) { 9166 printk(TPACPI_ERR "unable to register input device\n"); 9167 thinkpad_acpi_module_exit(); 9168 return ret; 9169 } else { 9170 tp_features.input_device_registered = 1; 9171 } 9172 9173 return 0; 9174} 9175 9176MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9177 9178/* 9179 * This will autoload the driver in almost every ThinkPad 9180 * in widespread use. 9181 * 9182 * Only _VERY_ old models, like the 240, 240x and 570 lack 9183 * the HKEY event interface. 9184 */ 9185MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9186 9187/* 9188 * DMI matching for module autoloading 9189 * 9190 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9191 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9192 * 9193 * Only models listed in thinkwiki will be supported, so add yours 9194 * if it is not there yet. 9195 */ 9196#define IBM_BIOS_MODULE_ALIAS(__type) \ 9197 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9198 9199/* Ancient thinkpad BIOSes have to be identified by 9200 * BIOS type or model number, and there are far less 9201 * BIOS types than model numbers... */ 9202IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9203 9204MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9205MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9206MODULE_DESCRIPTION(TPACPI_DESC); 9207MODULE_VERSION(TPACPI_VERSION); 9208MODULE_LICENSE("GPL"); 9209 9210module_init(thinkpad_acpi_module_init); 9211module_exit(thinkpad_acpi_module_exit); 9212