thinkpad_acpi.c revision 5451a923bbdcff6ae665947e120af7238b21a9d2
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 "0.23" 25#define TPACPI_SYSFS_VERSION 0x020600 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 62#include <linux/nvram.h> 63#include <linux/proc_fs.h> 64#include <linux/sysfs.h> 65#include <linux/backlight.h> 66#include <linux/fb.h> 67#include <linux/platform_device.h> 68#include <linux/hwmon.h> 69#include <linux/hwmon-sysfs.h> 70#include <linux/input.h> 71#include <linux/leds.h> 72#include <linux/rfkill.h> 73#include <asm/uaccess.h> 74 75#include <linux/dmi.h> 76#include <linux/jiffies.h> 77#include <linux/workqueue.h> 78 79#include <acpi/acpi_drivers.h> 80 81#include <linux/pci_ids.h> 82 83 84/* ThinkPad CMOS commands */ 85#define TP_CMOS_VOLUME_DOWN 0 86#define TP_CMOS_VOLUME_UP 1 87#define TP_CMOS_VOLUME_MUTE 2 88#define TP_CMOS_BRIGHTNESS_UP 4 89#define TP_CMOS_BRIGHTNESS_DOWN 5 90#define TP_CMOS_THINKLIGHT_ON 12 91#define TP_CMOS_THINKLIGHT_OFF 13 92 93/* NVRAM Addresses */ 94enum tp_nvram_addr { 95 TP_NVRAM_ADDR_HK2 = 0x57, 96 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 97 TP_NVRAM_ADDR_VIDEO = 0x59, 98 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 99 TP_NVRAM_ADDR_MIXER = 0x60, 100}; 101 102/* NVRAM bit masks */ 103enum { 104 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 105 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 106 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 107 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 108 TP_NVRAM_MASK_THINKLIGHT = 0x10, 109 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 110 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 111 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 112 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 113 TP_NVRAM_MASK_MUTE = 0x40, 114 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 115 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 116 TP_NVRAM_POS_LEVEL_VOLUME = 0, 117}; 118 119/* ACPI HIDs */ 120#define TPACPI_ACPI_HKEY_HID "IBM0068" 121 122/* Input IDs */ 123#define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 124#define TPACPI_HKEY_INPUT_VERSION 0x4101 125 126/* ACPI \WGSV commands */ 127enum { 128 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 129 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 130 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 131 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 132}; 133 134/* TP_ACPI_WGSV_GET_STATE bits */ 135enum { 136 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 137 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 138 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 139 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 140 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 141 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 142 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 143 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 144 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 145 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 146}; 147 148/* HKEY events */ 149enum tpacpi_hkey_event_t { 150 /* Hotkey-related */ 151 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 152 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 153 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 154 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 155 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 156 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 157 158 /* Reasons for waking up from S3/S4 */ 159 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 160 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 161 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 162 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 163 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 164 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 165 166 /* Auto-sleep after eject request */ 167 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 168 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 169 170 /* Misc bay events */ 171 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 172 173 /* User-interface events */ 174 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 175 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 176 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 177 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 178 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 179 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 180 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 181 182 /* Thermal events */ 183 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 184 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 185 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 186 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 187 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 188 189 /* Misc */ 190 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 191}; 192 193/**************************************************************************** 194 * Main driver 195 */ 196 197#define TPACPI_NAME "thinkpad" 198#define TPACPI_DESC "ThinkPad ACPI Extras" 199#define TPACPI_FILE TPACPI_NAME "_acpi" 200#define TPACPI_URL "http://ibm-acpi.sf.net/" 201#define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 202 203#define TPACPI_PROC_DIR "ibm" 204#define TPACPI_ACPI_EVENT_PREFIX "ibm" 205#define TPACPI_DRVR_NAME TPACPI_FILE 206#define TPACPI_DRVR_SHORTNAME "tpacpi" 207#define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 208 209#define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 210#define TPACPI_WORKQUEUE_NAME "ktpacpid" 211 212#define TPACPI_MAX_ACPI_ARGS 3 213 214/* printk headers */ 215#define TPACPI_LOG TPACPI_FILE ": " 216#define TPACPI_EMERG KERN_EMERG TPACPI_LOG 217#define TPACPI_ALERT KERN_ALERT TPACPI_LOG 218#define TPACPI_CRIT KERN_CRIT TPACPI_LOG 219#define TPACPI_ERR KERN_ERR TPACPI_LOG 220#define TPACPI_WARN KERN_WARNING TPACPI_LOG 221#define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG 222#define TPACPI_INFO KERN_INFO TPACPI_LOG 223#define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG 224 225/* Debugging printk groups */ 226#define TPACPI_DBG_ALL 0xffff 227#define TPACPI_DBG_DISCLOSETASK 0x8000 228#define TPACPI_DBG_INIT 0x0001 229#define TPACPI_DBG_EXIT 0x0002 230#define TPACPI_DBG_RFKILL 0x0004 231#define TPACPI_DBG_HKEY 0x0008 232#define TPACPI_DBG_FAN 0x0010 233#define TPACPI_DBG_BRGHT 0x0020 234 235#define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 236#define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 237#define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 238 239 240/**************************************************************************** 241 * Driver-wide structs and misc. variables 242 */ 243 244struct ibm_struct; 245 246struct tp_acpi_drv_struct { 247 const struct acpi_device_id *hid; 248 struct acpi_driver *driver; 249 250 void (*notify) (struct ibm_struct *, u32); 251 acpi_handle *handle; 252 u32 type; 253 struct acpi_device *device; 254}; 255 256struct ibm_struct { 257 char *name; 258 259 int (*read) (char *); 260 int (*write) (char *); 261 void (*exit) (void); 262 void (*resume) (void); 263 void (*suspend) (pm_message_t state); 264 void (*shutdown) (void); 265 266 struct list_head all_drivers; 267 268 struct tp_acpi_drv_struct *acpi; 269 270 struct { 271 u8 acpi_driver_registered:1; 272 u8 acpi_notify_installed:1; 273 u8 proc_created:1; 274 u8 init_called:1; 275 u8 experimental:1; 276 } flags; 277}; 278 279struct ibm_init_struct { 280 char param[32]; 281 282 int (*init) (struct ibm_init_struct *); 283 struct ibm_struct *data; 284}; 285 286static struct { 287 u32 bluetooth:1; 288 u32 hotkey:1; 289 u32 hotkey_mask:1; 290 u32 hotkey_wlsw:1; 291 u32 hotkey_tablet:1; 292 u32 light:1; 293 u32 light_status:1; 294 u32 bright_16levels:1; 295 u32 bright_acpimode:1; 296 u32 wan:1; 297 u32 uwb:1; 298 u32 fan_ctrl_status_undef:1; 299 u32 second_fan:1; 300 u32 beep_needs_two_args:1; 301 u32 input_device_registered:1; 302 u32 platform_drv_registered:1; 303 u32 platform_drv_attrs_registered:1; 304 u32 sensors_pdrv_registered:1; 305 u32 sensors_pdrv_attrs_registered:1; 306 u32 sensors_pdev_attrs_registered:1; 307 u32 hotkey_poll_active:1; 308} tp_features; 309 310static struct { 311 u16 hotkey_mask_ff:1; 312} tp_warned; 313 314struct thinkpad_id_data { 315 unsigned int vendor; /* ThinkPad vendor: 316 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 317 318 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 319 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 320 321 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 322 u16 ec_model; 323 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 324 u16 ec_release; 325 326 char *model_str; /* ThinkPad T43 */ 327 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 328}; 329static struct thinkpad_id_data thinkpad_id; 330 331static enum { 332 TPACPI_LIFE_INIT = 0, 333 TPACPI_LIFE_RUNNING, 334 TPACPI_LIFE_EXITING, 335} tpacpi_lifecycle; 336 337static int experimental; 338static u32 dbg_level; 339 340static struct workqueue_struct *tpacpi_wq; 341 342enum led_status_t { 343 TPACPI_LED_OFF = 0, 344 TPACPI_LED_ON, 345 TPACPI_LED_BLINK, 346}; 347 348/* Special LED class that can defer work */ 349struct tpacpi_led_classdev { 350 struct led_classdev led_classdev; 351 struct work_struct work; 352 enum led_status_t new_state; 353 unsigned int led; 354}; 355 356#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 357static int dbg_wlswemul; 358static int tpacpi_wlsw_emulstate; 359static int dbg_bluetoothemul; 360static int tpacpi_bluetooth_emulstate; 361static int dbg_wwanemul; 362static int tpacpi_wwan_emulstate; 363static int dbg_uwbemul; 364static int tpacpi_uwb_emulstate; 365#endif 366 367 368/************************************************************************* 369 * Debugging helpers 370 */ 371 372#define dbg_printk(a_dbg_level, format, arg...) \ 373 do { if (dbg_level & (a_dbg_level)) \ 374 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \ 375 } while (0) 376 377#ifdef CONFIG_THINKPAD_ACPI_DEBUG 378#define vdbg_printk dbg_printk 379static const char *str_supported(int is_supported); 380#else 381#define vdbg_printk(a_dbg_level, format, arg...) \ 382 do { } while (0) 383#endif 384 385static void tpacpi_log_usertask(const char * const what) 386{ 387 printk(TPACPI_DEBUG "%s: access by process with PID %d\n", 388 what, task_tgid_vnr(current)); 389} 390 391#define tpacpi_disclose_usertask(what, format, arg...) \ 392 do { \ 393 if (unlikely( \ 394 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 395 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 396 printk(TPACPI_DEBUG "%s: PID %d: " format, \ 397 what, task_tgid_vnr(current), ## arg); \ 398 } \ 399 } while (0) 400 401/* 402 * Quirk handling helpers 403 * 404 * ThinkPad IDs and versions seen in the field so far 405 * are two-characters from the set [0-9A-Z], i.e. base 36. 406 * 407 * We use values well outside that range as specials. 408 */ 409 410#define TPACPI_MATCH_ANY 0xffffU 411#define TPACPI_MATCH_UNKNOWN 0U 412 413/* TPID('1', 'Y') == 0x5931 */ 414#define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 415 416#define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 417 { .vendor = PCI_VENDOR_ID_IBM, \ 418 .bios = TPID(__id1, __id2), \ 419 .ec = TPACPI_MATCH_ANY, \ 420 .quirks = (__quirk) } 421 422#define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 423 { .vendor = PCI_VENDOR_ID_LENOVO, \ 424 .bios = TPID(__id1, __id2), \ 425 .ec = TPACPI_MATCH_ANY, \ 426 .quirks = (__quirk) } 427 428struct tpacpi_quirk { 429 unsigned int vendor; 430 u16 bios; 431 u16 ec; 432 unsigned long quirks; 433}; 434 435/** 436 * tpacpi_check_quirks() - search BIOS/EC version on a list 437 * @qlist: array of &struct tpacpi_quirk 438 * @qlist_size: number of elements in @qlist 439 * 440 * Iterates over a quirks list until one is found that matches the 441 * ThinkPad's vendor, BIOS and EC model. 442 * 443 * Returns 0 if nothing matches, otherwise returns the quirks field of 444 * the matching &struct tpacpi_quirk entry. 445 * 446 * The match criteria is: vendor, ec and bios much match. 447 */ 448static unsigned long __init tpacpi_check_quirks( 449 const struct tpacpi_quirk *qlist, 450 unsigned int qlist_size) 451{ 452 while (qlist_size) { 453 if ((qlist->vendor == thinkpad_id.vendor || 454 qlist->vendor == TPACPI_MATCH_ANY) && 455 (qlist->bios == thinkpad_id.bios_model || 456 qlist->bios == TPACPI_MATCH_ANY) && 457 (qlist->ec == thinkpad_id.ec_model || 458 qlist->ec == TPACPI_MATCH_ANY)) 459 return qlist->quirks; 460 461 qlist_size--; 462 qlist++; 463 } 464 return 0; 465} 466 467 468/**************************************************************************** 469 **************************************************************************** 470 * 471 * ACPI Helpers and device model 472 * 473 **************************************************************************** 474 ****************************************************************************/ 475 476/************************************************************************* 477 * ACPI basic handles 478 */ 479 480static acpi_handle root_handle; 481 482#define TPACPI_HANDLE(object, parent, paths...) \ 483 static acpi_handle object##_handle; \ 484 static acpi_handle *object##_parent = &parent##_handle; \ 485 static char *object##_path; \ 486 static char *object##_paths[] = { paths } 487 488TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0", /* 240, 240x */ 489 "\\_SB.PCI.ISA.EC", /* 570 */ 490 "\\_SB.PCI0.ISA0.EC0", /* 600e/x, 770e, 770x */ 491 "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */ 492 "\\_SB.PCI0.AD4S.EC0", /* i1400, R30 */ 493 "\\_SB.PCI0.ICH3.EC0", /* R31 */ 494 "\\_SB.PCI0.LPC.EC", /* all others */ 495 ); 496 497TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 498TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 499 500TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 501 /* T4x, X31, X40 */ 502 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 503 "\\CMS", /* R40, R40e */ 504 ); /* all others */ 505 506TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 507 "^HKEY", /* R30, R31 */ 508 "HKEY", /* all others */ 509 ); /* 570 */ 510 511TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */ 512 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 513 "\\_SB.PCI0.VID0", /* 770e */ 514 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 515 "\\_SB.PCI0.AGP.VID", /* all others */ 516 ); /* R30, R31 */ 517 518 519/************************************************************************* 520 * ACPI helpers 521 */ 522 523static int acpi_evalf(acpi_handle handle, 524 void *res, char *method, char *fmt, ...) 525{ 526 char *fmt0 = fmt; 527 struct acpi_object_list params; 528 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 529 struct acpi_buffer result, *resultp; 530 union acpi_object out_obj; 531 acpi_status status; 532 va_list ap; 533 char res_type; 534 int success; 535 int quiet; 536 537 if (!*fmt) { 538 printk(TPACPI_ERR "acpi_evalf() called with empty format\n"); 539 return 0; 540 } 541 542 if (*fmt == 'q') { 543 quiet = 1; 544 fmt++; 545 } else 546 quiet = 0; 547 548 res_type = *(fmt++); 549 550 params.count = 0; 551 params.pointer = &in_objs[0]; 552 553 va_start(ap, fmt); 554 while (*fmt) { 555 char c = *(fmt++); 556 switch (c) { 557 case 'd': /* int */ 558 in_objs[params.count].integer.value = va_arg(ap, int); 559 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 560 break; 561 /* add more types as needed */ 562 default: 563 printk(TPACPI_ERR "acpi_evalf() called " 564 "with invalid format character '%c'\n", c); 565 return 0; 566 } 567 } 568 va_end(ap); 569 570 if (res_type != 'v') { 571 result.length = sizeof(out_obj); 572 result.pointer = &out_obj; 573 resultp = &result; 574 } else 575 resultp = NULL; 576 577 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 578 579 switch (res_type) { 580 case 'd': /* int */ 581 if (res) 582 *(int *)res = out_obj.integer.value; 583 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER; 584 break; 585 case 'v': /* void */ 586 success = status == AE_OK; 587 break; 588 /* add more types as needed */ 589 default: 590 printk(TPACPI_ERR "acpi_evalf() called " 591 "with invalid format character '%c'\n", res_type); 592 return 0; 593 } 594 595 if (!success && !quiet) 596 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n", 597 method, fmt0, status); 598 599 return success; 600} 601 602static int acpi_ec_read(int i, u8 *p) 603{ 604 int v; 605 606 if (ecrd_handle) { 607 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 608 return 0; 609 *p = v; 610 } else { 611 if (ec_read(i, p) < 0) 612 return 0; 613 } 614 615 return 1; 616} 617 618static int acpi_ec_write(int i, u8 v) 619{ 620 if (ecwr_handle) { 621 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 622 return 0; 623 } else { 624 if (ec_write(i, v) < 0) 625 return 0; 626 } 627 628 return 1; 629} 630 631static int issue_thinkpad_cmos_command(int cmos_cmd) 632{ 633 if (!cmos_handle) 634 return -ENXIO; 635 636 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 637 return -EIO; 638 639 return 0; 640} 641 642/************************************************************************* 643 * ACPI device model 644 */ 645 646#define TPACPI_ACPIHANDLE_INIT(object) \ 647 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 648 object##_paths, ARRAY_SIZE(object##_paths), &object##_path) 649 650static void drv_acpi_handle_init(char *name, 651 acpi_handle *handle, acpi_handle parent, 652 char **paths, int num_paths, char **path) 653{ 654 int i; 655 acpi_status status; 656 657 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 658 name); 659 660 for (i = 0; i < num_paths; i++) { 661 status = acpi_get_handle(parent, paths[i], handle); 662 if (ACPI_SUCCESS(status)) { 663 *path = paths[i]; 664 dbg_printk(TPACPI_DBG_INIT, 665 "Found ACPI handle %s for %s\n", 666 *path, name); 667 return; 668 } 669 } 670 671 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 672 name); 673 *handle = NULL; 674} 675 676static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 677{ 678 struct ibm_struct *ibm = data; 679 680 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 681 return; 682 683 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 684 return; 685 686 ibm->acpi->notify(ibm, event); 687} 688 689static int __init setup_acpi_notify(struct ibm_struct *ibm) 690{ 691 acpi_status status; 692 int rc; 693 694 BUG_ON(!ibm->acpi); 695 696 if (!*ibm->acpi->handle) 697 return 0; 698 699 vdbg_printk(TPACPI_DBG_INIT, 700 "setting up ACPI notify for %s\n", ibm->name); 701 702 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 703 if (rc < 0) { 704 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n", 705 ibm->name, rc); 706 return -ENODEV; 707 } 708 709 ibm->acpi->device->driver_data = ibm; 710 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 711 TPACPI_ACPI_EVENT_PREFIX, 712 ibm->name); 713 714 status = acpi_install_notify_handler(*ibm->acpi->handle, 715 ibm->acpi->type, dispatch_acpi_notify, ibm); 716 if (ACPI_FAILURE(status)) { 717 if (status == AE_ALREADY_EXISTS) { 718 printk(TPACPI_NOTICE 719 "another device driver is already " 720 "handling %s events\n", ibm->name); 721 } else { 722 printk(TPACPI_ERR 723 "acpi_install_notify_handler(%s) failed: %d\n", 724 ibm->name, status); 725 } 726 return -ENODEV; 727 } 728 ibm->flags.acpi_notify_installed = 1; 729 return 0; 730} 731 732static int __init tpacpi_device_add(struct acpi_device *device) 733{ 734 return 0; 735} 736 737static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 738{ 739 int rc; 740 741 dbg_printk(TPACPI_DBG_INIT, 742 "registering %s as an ACPI driver\n", ibm->name); 743 744 BUG_ON(!ibm->acpi); 745 746 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 747 if (!ibm->acpi->driver) { 748 printk(TPACPI_ERR 749 "failed to allocate memory for ibm->acpi->driver\n"); 750 return -ENOMEM; 751 } 752 753 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 754 ibm->acpi->driver->ids = ibm->acpi->hid; 755 756 ibm->acpi->driver->ops.add = &tpacpi_device_add; 757 758 rc = acpi_bus_register_driver(ibm->acpi->driver); 759 if (rc < 0) { 760 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n", 761 ibm->name, rc); 762 kfree(ibm->acpi->driver); 763 ibm->acpi->driver = NULL; 764 } else if (!rc) 765 ibm->flags.acpi_driver_registered = 1; 766 767 return rc; 768} 769 770 771/**************************************************************************** 772 **************************************************************************** 773 * 774 * Procfs Helpers 775 * 776 **************************************************************************** 777 ****************************************************************************/ 778 779static int dispatch_procfs_read(char *page, char **start, off_t off, 780 int count, int *eof, void *data) 781{ 782 struct ibm_struct *ibm = data; 783 int len; 784 785 if (!ibm || !ibm->read) 786 return -EINVAL; 787 788 len = ibm->read(page); 789 if (len < 0) 790 return len; 791 792 if (len <= off + count) 793 *eof = 1; 794 *start = page + off; 795 len -= off; 796 if (len > count) 797 len = count; 798 if (len < 0) 799 len = 0; 800 801 return len; 802} 803 804static int dispatch_procfs_write(struct file *file, 805 const char __user *userbuf, 806 unsigned long count, void *data) 807{ 808 struct ibm_struct *ibm = data; 809 char *kernbuf; 810 int ret; 811 812 if (!ibm || !ibm->write) 813 return -EINVAL; 814 if (count > PAGE_SIZE - 2) 815 return -EINVAL; 816 817 kernbuf = kmalloc(count + 2, GFP_KERNEL); 818 if (!kernbuf) 819 return -ENOMEM; 820 821 if (copy_from_user(kernbuf, userbuf, count)) { 822 kfree(kernbuf); 823 return -EFAULT; 824 } 825 826 kernbuf[count] = 0; 827 strcat(kernbuf, ","); 828 ret = ibm->write(kernbuf); 829 if (ret == 0) 830 ret = count; 831 832 kfree(kernbuf); 833 834 return ret; 835} 836 837static char *next_cmd(char **cmds) 838{ 839 char *start = *cmds; 840 char *end; 841 842 while ((end = strchr(start, ',')) && end == start) 843 start = end + 1; 844 845 if (!end) 846 return NULL; 847 848 *end = 0; 849 *cmds = end + 1; 850 return start; 851} 852 853 854/**************************************************************************** 855 **************************************************************************** 856 * 857 * Device model: input, hwmon and platform 858 * 859 **************************************************************************** 860 ****************************************************************************/ 861 862static struct platform_device *tpacpi_pdev; 863static struct platform_device *tpacpi_sensors_pdev; 864static struct device *tpacpi_hwmon; 865static struct input_dev *tpacpi_inputdev; 866static struct mutex tpacpi_inputdev_send_mutex; 867static LIST_HEAD(tpacpi_all_drivers); 868 869static int tpacpi_suspend_handler(struct platform_device *pdev, 870 pm_message_t state) 871{ 872 struct ibm_struct *ibm, *itmp; 873 874 list_for_each_entry_safe(ibm, itmp, 875 &tpacpi_all_drivers, 876 all_drivers) { 877 if (ibm->suspend) 878 (ibm->suspend)(state); 879 } 880 881 return 0; 882} 883 884static int tpacpi_resume_handler(struct platform_device *pdev) 885{ 886 struct ibm_struct *ibm, *itmp; 887 888 list_for_each_entry_safe(ibm, itmp, 889 &tpacpi_all_drivers, 890 all_drivers) { 891 if (ibm->resume) 892 (ibm->resume)(); 893 } 894 895 return 0; 896} 897 898static void tpacpi_shutdown_handler(struct platform_device *pdev) 899{ 900 struct ibm_struct *ibm, *itmp; 901 902 list_for_each_entry_safe(ibm, itmp, 903 &tpacpi_all_drivers, 904 all_drivers) { 905 if (ibm->shutdown) 906 (ibm->shutdown)(); 907 } 908} 909 910static struct platform_driver tpacpi_pdriver = { 911 .driver = { 912 .name = TPACPI_DRVR_NAME, 913 .owner = THIS_MODULE, 914 }, 915 .suspend = tpacpi_suspend_handler, 916 .resume = tpacpi_resume_handler, 917 .shutdown = tpacpi_shutdown_handler, 918}; 919 920static struct platform_driver tpacpi_hwmon_pdriver = { 921 .driver = { 922 .name = TPACPI_HWMON_DRVR_NAME, 923 .owner = THIS_MODULE, 924 }, 925}; 926 927/************************************************************************* 928 * sysfs support helpers 929 */ 930 931struct attribute_set { 932 unsigned int members, max_members; 933 struct attribute_group group; 934}; 935 936struct attribute_set_obj { 937 struct attribute_set s; 938 struct attribute *a; 939} __attribute__((packed)); 940 941static struct attribute_set *create_attr_set(unsigned int max_members, 942 const char *name) 943{ 944 struct attribute_set_obj *sobj; 945 946 if (max_members == 0) 947 return NULL; 948 949 /* Allocates space for implicit NULL at the end too */ 950 sobj = kzalloc(sizeof(struct attribute_set_obj) + 951 max_members * sizeof(struct attribute *), 952 GFP_KERNEL); 953 if (!sobj) 954 return NULL; 955 sobj->s.max_members = max_members; 956 sobj->s.group.attrs = &sobj->a; 957 sobj->s.group.name = name; 958 959 return &sobj->s; 960} 961 962#define destroy_attr_set(_set) \ 963 kfree(_set); 964 965/* not multi-threaded safe, use it in a single thread per set */ 966static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 967{ 968 if (!s || !attr) 969 return -EINVAL; 970 971 if (s->members >= s->max_members) 972 return -ENOMEM; 973 974 s->group.attrs[s->members] = attr; 975 s->members++; 976 977 return 0; 978} 979 980static int add_many_to_attr_set(struct attribute_set *s, 981 struct attribute **attr, 982 unsigned int count) 983{ 984 int i, res; 985 986 for (i = 0; i < count; i++) { 987 res = add_to_attr_set(s, attr[i]); 988 if (res) 989 return res; 990 } 991 992 return 0; 993} 994 995static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 996{ 997 sysfs_remove_group(kobj, &s->group); 998 destroy_attr_set(s); 999} 1000 1001#define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1002 sysfs_create_group(_kobj, &_attr_set->group) 1003 1004static int parse_strtoul(const char *buf, 1005 unsigned long max, unsigned long *value) 1006{ 1007 char *endp; 1008 1009 while (*buf && isspace(*buf)) 1010 buf++; 1011 *value = simple_strtoul(buf, &endp, 0); 1012 while (*endp && isspace(*endp)) 1013 endp++; 1014 if (*endp || *value > max) 1015 return -EINVAL; 1016 1017 return 0; 1018} 1019 1020static void tpacpi_disable_brightness_delay(void) 1021{ 1022 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1023 printk(TPACPI_NOTICE 1024 "ACPI backlight control delay disabled\n"); 1025} 1026 1027static int __init tpacpi_query_bcl_levels(acpi_handle handle) 1028{ 1029 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 1030 union acpi_object *obj; 1031 int rc; 1032 1033 if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) { 1034 obj = (union acpi_object *)buffer.pointer; 1035 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 1036 printk(TPACPI_ERR "Unknown _BCL data, " 1037 "please report this to %s\n", TPACPI_MAIL); 1038 rc = 0; 1039 } else { 1040 rc = obj->package.count; 1041 } 1042 } else { 1043 return 0; 1044 } 1045 1046 kfree(buffer.pointer); 1047 return rc; 1048} 1049 1050static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle, 1051 u32 lvl, void *context, void **rv) 1052{ 1053 char name[ACPI_PATH_SEGMENT_LENGTH]; 1054 struct acpi_buffer buffer = { sizeof(name), &name }; 1055 1056 if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) && 1057 !strncmp("_BCL", name, sizeof(name) - 1)) { 1058 BUG_ON(!rv || !*rv); 1059 **(int **)rv = tpacpi_query_bcl_levels(handle); 1060 return AE_CTRL_TERMINATE; 1061 } else { 1062 return AE_OK; 1063 } 1064} 1065 1066/* 1067 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 1068 */ 1069static int __init tpacpi_check_std_acpi_brightness_support(void) 1070{ 1071 int status; 1072 int bcl_levels = 0; 1073 void *bcl_ptr = &bcl_levels; 1074 1075 if (!vid_handle) { 1076 TPACPI_ACPIHANDLE_INIT(vid); 1077 } 1078 if (!vid_handle) 1079 return 0; 1080 1081 /* 1082 * Search for a _BCL method, and execute it. This is safe on all 1083 * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista 1084 * BIOS in ACPI backlight control mode. We do NOT have to care 1085 * about calling the _BCL method in an enabled video device, any 1086 * will do for our purposes. 1087 */ 1088 1089 status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3, 1090 tpacpi_acpi_walk_find_bcl, NULL, 1091 &bcl_ptr); 1092 1093 if (ACPI_SUCCESS(status) && bcl_levels > 2) { 1094 tp_features.bright_acpimode = 1; 1095 return (bcl_levels - 2); 1096 } 1097 1098 return 0; 1099} 1100 1101static void printk_deprecated_attribute(const char * const what, 1102 const char * const details) 1103{ 1104 tpacpi_log_usertask("deprecated sysfs attribute"); 1105 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and " 1106 "will be removed. %s\n", 1107 what, details); 1108} 1109 1110/************************************************************************* 1111 * rfkill and radio control support helpers 1112 */ 1113 1114/* 1115 * ThinkPad-ACPI firmware handling model: 1116 * 1117 * WLSW (master wireless switch) is event-driven, and is common to all 1118 * firmware-controlled radios. It cannot be controlled, just monitored, 1119 * as expected. It overrides all radio state in firmware 1120 * 1121 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1122 * (TODO: verify how WLSW interacts with the returned radio state). 1123 * 1124 * The only time there are shadow radio state changes, is when 1125 * masked-off hotkeys are used. 1126 */ 1127 1128/* 1129 * Internal driver API for radio state: 1130 * 1131 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1132 * bool: true means radio blocked (off) 1133 */ 1134enum tpacpi_rfkill_state { 1135 TPACPI_RFK_RADIO_OFF = 0, 1136 TPACPI_RFK_RADIO_ON 1137}; 1138 1139/* rfkill switches */ 1140enum tpacpi_rfk_id { 1141 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1142 TPACPI_RFK_WWAN_SW_ID, 1143 TPACPI_RFK_UWB_SW_ID, 1144 TPACPI_RFK_SW_MAX 1145}; 1146 1147static const char *tpacpi_rfkill_names[] = { 1148 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1149 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1150 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1151 [TPACPI_RFK_SW_MAX] = NULL 1152}; 1153 1154/* ThinkPad-ACPI rfkill subdriver */ 1155struct tpacpi_rfk { 1156 struct rfkill *rfkill; 1157 enum tpacpi_rfk_id id; 1158 const struct tpacpi_rfk_ops *ops; 1159}; 1160 1161struct tpacpi_rfk_ops { 1162 /* firmware interface */ 1163 int (*get_status)(void); 1164 int (*set_status)(const enum tpacpi_rfkill_state); 1165}; 1166 1167static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1168 1169/* Query FW and update rfkill sw state for a given rfkill switch */ 1170static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1171{ 1172 int status; 1173 1174 if (!tp_rfk) 1175 return -ENODEV; 1176 1177 status = (tp_rfk->ops->get_status)(); 1178 if (status < 0) 1179 return status; 1180 1181 rfkill_set_sw_state(tp_rfk->rfkill, 1182 (status == TPACPI_RFK_RADIO_OFF)); 1183 1184 return status; 1185} 1186 1187/* Query FW and update rfkill sw state for all rfkill switches */ 1188static void tpacpi_rfk_update_swstate_all(void) 1189{ 1190 unsigned int i; 1191 1192 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1193 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1194} 1195 1196/* 1197 * Sync the HW-blocking state of all rfkill switches, 1198 * do notice it causes the rfkill core to schedule uevents 1199 */ 1200static void tpacpi_rfk_update_hwblock_state(bool blocked) 1201{ 1202 unsigned int i; 1203 struct tpacpi_rfk *tp_rfk; 1204 1205 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1206 tp_rfk = tpacpi_rfkill_switches[i]; 1207 if (tp_rfk) { 1208 if (rfkill_set_hw_state(tp_rfk->rfkill, 1209 blocked)) { 1210 /* ignore -- we track sw block */ 1211 } 1212 } 1213 } 1214} 1215 1216/* Call to get the WLSW state from the firmware */ 1217static int hotkey_get_wlsw(void); 1218 1219/* Call to query WLSW state and update all rfkill switches */ 1220static bool tpacpi_rfk_check_hwblock_state(void) 1221{ 1222 int res = hotkey_get_wlsw(); 1223 int hw_blocked; 1224 1225 /* When unknown or unsupported, we have to assume it is unblocked */ 1226 if (res < 0) 1227 return false; 1228 1229 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1230 tpacpi_rfk_update_hwblock_state(hw_blocked); 1231 1232 return hw_blocked; 1233} 1234 1235static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1236{ 1237 struct tpacpi_rfk *tp_rfk = data; 1238 int res; 1239 1240 dbg_printk(TPACPI_DBG_RFKILL, 1241 "request to change radio state to %s\n", 1242 blocked ? "blocked" : "unblocked"); 1243 1244 /* try to set radio state */ 1245 res = (tp_rfk->ops->set_status)(blocked ? 1246 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1247 1248 /* and update the rfkill core with whatever the FW really did */ 1249 tpacpi_rfk_update_swstate(tp_rfk); 1250 1251 return (res < 0) ? res : 0; 1252} 1253 1254static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1255 .set_block = tpacpi_rfk_hook_set_block, 1256}; 1257 1258static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1259 const struct tpacpi_rfk_ops *tp_rfkops, 1260 const enum rfkill_type rfktype, 1261 const char *name, 1262 const bool set_default) 1263{ 1264 struct tpacpi_rfk *atp_rfk; 1265 int res; 1266 bool sw_state = false; 1267 bool hw_state; 1268 int sw_status; 1269 1270 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1271 1272 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1273 if (atp_rfk) 1274 atp_rfk->rfkill = rfkill_alloc(name, 1275 &tpacpi_pdev->dev, 1276 rfktype, 1277 &tpacpi_rfk_rfkill_ops, 1278 atp_rfk); 1279 if (!atp_rfk || !atp_rfk->rfkill) { 1280 printk(TPACPI_ERR 1281 "failed to allocate memory for rfkill class\n"); 1282 kfree(atp_rfk); 1283 return -ENOMEM; 1284 } 1285 1286 atp_rfk->id = id; 1287 atp_rfk->ops = tp_rfkops; 1288 1289 sw_status = (tp_rfkops->get_status)(); 1290 if (sw_status < 0) { 1291 printk(TPACPI_ERR 1292 "failed to read initial state for %s, error %d\n", 1293 name, sw_status); 1294 } else { 1295 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1296 if (set_default) { 1297 /* try to keep the initial state, since we ask the 1298 * firmware to preserve it across S5 in NVRAM */ 1299 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1300 } 1301 } 1302 hw_state = tpacpi_rfk_check_hwblock_state(); 1303 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1304 1305 res = rfkill_register(atp_rfk->rfkill); 1306 if (res < 0) { 1307 printk(TPACPI_ERR 1308 "failed to register %s rfkill switch: %d\n", 1309 name, res); 1310 rfkill_destroy(atp_rfk->rfkill); 1311 kfree(atp_rfk); 1312 return res; 1313 } 1314 1315 tpacpi_rfkill_switches[id] = atp_rfk; 1316 1317 printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n", 1318 name, (sw_state || hw_state) ? "" : "un"); 1319 return 0; 1320} 1321 1322static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1323{ 1324 struct tpacpi_rfk *tp_rfk; 1325 1326 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1327 1328 tp_rfk = tpacpi_rfkill_switches[id]; 1329 if (tp_rfk) { 1330 rfkill_unregister(tp_rfk->rfkill); 1331 rfkill_destroy(tp_rfk->rfkill); 1332 tpacpi_rfkill_switches[id] = NULL; 1333 kfree(tp_rfk); 1334 } 1335} 1336 1337static void printk_deprecated_rfkill_attribute(const char * const what) 1338{ 1339 printk_deprecated_attribute(what, 1340 "Please switch to generic rfkill before year 2010"); 1341} 1342 1343/* sysfs <radio> enable ------------------------------------------------ */ 1344static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1345 struct device_attribute *attr, 1346 char *buf) 1347{ 1348 int status; 1349 1350 printk_deprecated_rfkill_attribute(attr->attr.name); 1351 1352 /* This is in the ABI... */ 1353 if (tpacpi_rfk_check_hwblock_state()) { 1354 status = TPACPI_RFK_RADIO_OFF; 1355 } else { 1356 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1357 if (status < 0) 1358 return status; 1359 } 1360 1361 return snprintf(buf, PAGE_SIZE, "%d\n", 1362 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1363} 1364 1365static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1366 struct device_attribute *attr, 1367 const char *buf, size_t count) 1368{ 1369 unsigned long t; 1370 int res; 1371 1372 printk_deprecated_rfkill_attribute(attr->attr.name); 1373 1374 if (parse_strtoul(buf, 1, &t)) 1375 return -EINVAL; 1376 1377 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1378 1379 /* This is in the ABI... */ 1380 if (tpacpi_rfk_check_hwblock_state() && !!t) 1381 return -EPERM; 1382 1383 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1384 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1385 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1386 1387 return (res < 0) ? res : count; 1388} 1389 1390/* procfs -------------------------------------------------------------- */ 1391static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p) 1392{ 1393 int len = 0; 1394 1395 if (id >= TPACPI_RFK_SW_MAX) 1396 len += sprintf(p + len, "status:\t\tnot supported\n"); 1397 else { 1398 int status; 1399 1400 /* This is in the ABI... */ 1401 if (tpacpi_rfk_check_hwblock_state()) { 1402 status = TPACPI_RFK_RADIO_OFF; 1403 } else { 1404 status = tpacpi_rfk_update_swstate( 1405 tpacpi_rfkill_switches[id]); 1406 if (status < 0) 1407 return status; 1408 } 1409 1410 len += sprintf(p + len, "status:\t\t%s\n", 1411 (status == TPACPI_RFK_RADIO_ON) ? 1412 "enabled" : "disabled"); 1413 len += sprintf(p + len, "commands:\tenable, disable\n"); 1414 } 1415 1416 return len; 1417} 1418 1419static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1420{ 1421 char *cmd; 1422 int status = -1; 1423 int res = 0; 1424 1425 if (id >= TPACPI_RFK_SW_MAX) 1426 return -ENODEV; 1427 1428 while ((cmd = next_cmd(&buf))) { 1429 if (strlencmp(cmd, "enable") == 0) 1430 status = TPACPI_RFK_RADIO_ON; 1431 else if (strlencmp(cmd, "disable") == 0) 1432 status = TPACPI_RFK_RADIO_OFF; 1433 else 1434 return -EINVAL; 1435 } 1436 1437 if (status != -1) { 1438 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1439 (status == TPACPI_RFK_RADIO_ON) ? 1440 "enable" : "disable", 1441 tpacpi_rfkill_names[id]); 1442 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1443 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1444 } 1445 1446 return res; 1447} 1448 1449/************************************************************************* 1450 * thinkpad-acpi driver attributes 1451 */ 1452 1453/* interface_version --------------------------------------------------- */ 1454static ssize_t tpacpi_driver_interface_version_show( 1455 struct device_driver *drv, 1456 char *buf) 1457{ 1458 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1459} 1460 1461static DRIVER_ATTR(interface_version, S_IRUGO, 1462 tpacpi_driver_interface_version_show, NULL); 1463 1464/* debug_level --------------------------------------------------------- */ 1465static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1466 char *buf) 1467{ 1468 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1469} 1470 1471static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1472 const char *buf, size_t count) 1473{ 1474 unsigned long t; 1475 1476 if (parse_strtoul(buf, 0xffff, &t)) 1477 return -EINVAL; 1478 1479 dbg_level = t; 1480 1481 return count; 1482} 1483 1484static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1485 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1486 1487/* version ------------------------------------------------------------- */ 1488static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1489 char *buf) 1490{ 1491 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1492 TPACPI_DESC, TPACPI_VERSION); 1493} 1494 1495static DRIVER_ATTR(version, S_IRUGO, 1496 tpacpi_driver_version_show, NULL); 1497 1498/* --------------------------------------------------------------------- */ 1499 1500#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1501 1502/* wlsw_emulstate ------------------------------------------------------ */ 1503static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1504 char *buf) 1505{ 1506 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1507} 1508 1509static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1510 const char *buf, size_t count) 1511{ 1512 unsigned long t; 1513 1514 if (parse_strtoul(buf, 1, &t)) 1515 return -EINVAL; 1516 1517 if (tpacpi_wlsw_emulstate != !!t) { 1518 tpacpi_wlsw_emulstate = !!t; 1519 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1520 } 1521 1522 return count; 1523} 1524 1525static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1526 tpacpi_driver_wlsw_emulstate_show, 1527 tpacpi_driver_wlsw_emulstate_store); 1528 1529/* bluetooth_emulstate ------------------------------------------------- */ 1530static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1531 struct device_driver *drv, 1532 char *buf) 1533{ 1534 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1535} 1536 1537static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1538 struct device_driver *drv, 1539 const char *buf, size_t count) 1540{ 1541 unsigned long t; 1542 1543 if (parse_strtoul(buf, 1, &t)) 1544 return -EINVAL; 1545 1546 tpacpi_bluetooth_emulstate = !!t; 1547 1548 return count; 1549} 1550 1551static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1552 tpacpi_driver_bluetooth_emulstate_show, 1553 tpacpi_driver_bluetooth_emulstate_store); 1554 1555/* wwan_emulstate ------------------------------------------------- */ 1556static ssize_t tpacpi_driver_wwan_emulstate_show( 1557 struct device_driver *drv, 1558 char *buf) 1559{ 1560 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1561} 1562 1563static ssize_t tpacpi_driver_wwan_emulstate_store( 1564 struct device_driver *drv, 1565 const char *buf, size_t count) 1566{ 1567 unsigned long t; 1568 1569 if (parse_strtoul(buf, 1, &t)) 1570 return -EINVAL; 1571 1572 tpacpi_wwan_emulstate = !!t; 1573 1574 return count; 1575} 1576 1577static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1578 tpacpi_driver_wwan_emulstate_show, 1579 tpacpi_driver_wwan_emulstate_store); 1580 1581/* uwb_emulstate ------------------------------------------------- */ 1582static ssize_t tpacpi_driver_uwb_emulstate_show( 1583 struct device_driver *drv, 1584 char *buf) 1585{ 1586 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1587} 1588 1589static ssize_t tpacpi_driver_uwb_emulstate_store( 1590 struct device_driver *drv, 1591 const char *buf, size_t count) 1592{ 1593 unsigned long t; 1594 1595 if (parse_strtoul(buf, 1, &t)) 1596 return -EINVAL; 1597 1598 tpacpi_uwb_emulstate = !!t; 1599 1600 return count; 1601} 1602 1603static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1604 tpacpi_driver_uwb_emulstate_show, 1605 tpacpi_driver_uwb_emulstate_store); 1606#endif 1607 1608/* --------------------------------------------------------------------- */ 1609 1610static struct driver_attribute *tpacpi_driver_attributes[] = { 1611 &driver_attr_debug_level, &driver_attr_version, 1612 &driver_attr_interface_version, 1613}; 1614 1615static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1616{ 1617 int i, res; 1618 1619 i = 0; 1620 res = 0; 1621 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1622 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1623 i++; 1624 } 1625 1626#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1627 if (!res && dbg_wlswemul) 1628 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1629 if (!res && dbg_bluetoothemul) 1630 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1631 if (!res && dbg_wwanemul) 1632 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1633 if (!res && dbg_uwbemul) 1634 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1635#endif 1636 1637 return res; 1638} 1639 1640static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1641{ 1642 int i; 1643 1644 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1645 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1646 1647#ifdef THINKPAD_ACPI_DEBUGFACILITIES 1648 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1649 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1650 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1651 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1652#endif 1653} 1654 1655/************************************************************************* 1656 * Firmware Data 1657 */ 1658 1659/* 1660 * Table of recommended minimum BIOS versions 1661 * 1662 * Reasons for listing: 1663 * 1. Stable BIOS, listed because the unknown ammount of 1664 * bugs and bad ACPI behaviour on older versions 1665 * 1666 * 2. BIOS or EC fw with known bugs that trigger on Linux 1667 * 1668 * 3. BIOS with known reduced functionality in older versions 1669 * 1670 * We recommend the latest BIOS and EC version. 1671 * We only support the latest BIOS and EC fw version as a rule. 1672 * 1673 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1674 * Information from users in ThinkWiki 1675 * 1676 * WARNING: we use this table also to detect that the machine is 1677 * a ThinkPad in some cases, so don't remove entries lightly. 1678 */ 1679 1680#define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1681 { .vendor = (__v), \ 1682 .bios = TPID(__id1, __id2), \ 1683 .ec = TPACPI_MATCH_ANY, \ 1684 .quirks = TPACPI_MATCH_ANY << 16 \ 1685 | (__bv1) << 8 | (__bv2) } 1686 1687#define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1688 __eid, __ev1, __ev2) \ 1689 { .vendor = (__v), \ 1690 .bios = TPID(__bid1, __bid2), \ 1691 .ec = __eid, \ 1692 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1693 | (__bv1) << 8 | (__bv2) } 1694 1695#define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1696 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1697 1698/* Outdated IBM BIOSes often lack the EC id string */ 1699#define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1700 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1701 __bv1, __bv2, TPID(__id1, __id2), \ 1702 __ev1, __ev2), \ 1703 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1704 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1705 __ev1, __ev2) 1706 1707/* Outdated IBM BIOSes often lack the EC id string */ 1708#define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1709 __eid1, __eid2, __ev1, __ev2) \ 1710 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1711 __bv1, __bv2, TPID(__eid1, __eid2), \ 1712 __ev1, __ev2), \ 1713 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1714 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1715 __ev1, __ev2) 1716 1717#define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1718 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1719 1720#define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1721 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1722 __bv1, __bv2, TPID(__id1, __id2), \ 1723 __ev1, __ev2) 1724 1725#define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1726 __eid1, __eid2, __ev1, __ev2) \ 1727 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1728 __bv1, __bv2, TPID(__eid1, __eid2), \ 1729 __ev1, __ev2) 1730 1731static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1732 /* Numeric models ------------------ */ 1733 /* FW MODEL BIOS VERS */ 1734 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1735 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1736 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1737 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1738 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1739 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1740 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1741 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1742 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1743 1744 /* A-series ------------------------- */ 1745 /* FW MODEL BIOS VERS EC VERS */ 1746 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1747 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1748 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1749 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1750 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1751 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1752 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1753 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1754 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1755 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1756 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1757 1758 /* G-series ------------------------- */ 1759 /* FW MODEL BIOS VERS */ 1760 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1761 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1762 1763 /* R-series, T-series --------------- */ 1764 /* FW MODEL BIOS VERS EC VERS */ 1765 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1766 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1767 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1768 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1769 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1770 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1771 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1772 T40/p, T41/p, T42/p (1) */ 1773 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1774 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1775 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1776 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1777 1778 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1779 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1780 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1781 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1782 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1783 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1784 1785 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1786 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1787 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1788 1789 /* BIOS FW BIOS VERS EC FW EC VERS */ 1790 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1791 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1792 1793 /* X-series ------------------------- */ 1794 /* FW MODEL BIOS VERS EC VERS */ 1795 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1796 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1797 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1798 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1799 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1800 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1801 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1802 1803 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1804 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1805 1806 /* (0) - older versions lack DMI EC fw string and functionality */ 1807 /* (1) - older versions known to lack functionality */ 1808}; 1809 1810#undef TPV_QL1 1811#undef TPV_QL0 1812#undef TPV_QI2 1813#undef TPV_QI1 1814#undef TPV_QI0 1815#undef TPV_Q_X 1816#undef TPV_Q 1817 1818static void __init tpacpi_check_outdated_fw(void) 1819{ 1820 unsigned long fwvers; 1821 u16 ec_version, bios_version; 1822 1823 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1824 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1825 1826 if (!fwvers) 1827 return; 1828 1829 bios_version = fwvers & 0xffffU; 1830 ec_version = (fwvers >> 16) & 0xffffU; 1831 1832 /* note that unknown versions are set to 0x0000 and we use that */ 1833 if ((bios_version > thinkpad_id.bios_release) || 1834 (ec_version > thinkpad_id.ec_release && 1835 ec_version != TPACPI_MATCH_ANY)) { 1836 /* 1837 * The changelogs would let us track down the exact 1838 * reason, but it is just too much of a pain to track 1839 * it. We only list BIOSes that are either really 1840 * broken, or really stable to begin with, so it is 1841 * best if the user upgrades the firmware anyway. 1842 */ 1843 printk(TPACPI_WARN 1844 "WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1845 printk(TPACPI_WARN 1846 "WARNING: This firmware may be missing critical bug " 1847 "fixes and/or important features\n"); 1848 } 1849} 1850 1851static bool __init tpacpi_is_fw_known(void) 1852{ 1853 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1854 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1855} 1856 1857/**************************************************************************** 1858 **************************************************************************** 1859 * 1860 * Subdrivers 1861 * 1862 **************************************************************************** 1863 ****************************************************************************/ 1864 1865/************************************************************************* 1866 * thinkpad-acpi init subdriver 1867 */ 1868 1869static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm) 1870{ 1871 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 1872 printk(TPACPI_INFO "%s\n", TPACPI_URL); 1873 1874 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n", 1875 (thinkpad_id.bios_version_str) ? 1876 thinkpad_id.bios_version_str : "unknown", 1877 (thinkpad_id.ec_version_str) ? 1878 thinkpad_id.ec_version_str : "unknown"); 1879 1880 if (thinkpad_id.vendor && thinkpad_id.model_str) 1881 printk(TPACPI_INFO "%s %s, model %s\n", 1882 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 1883 "IBM" : ((thinkpad_id.vendor == 1884 PCI_VENDOR_ID_LENOVO) ? 1885 "Lenovo" : "Unknown vendor"), 1886 thinkpad_id.model_str, 1887 (thinkpad_id.nummodel_str) ? 1888 thinkpad_id.nummodel_str : "unknown"); 1889 1890 tpacpi_check_outdated_fw(); 1891 return 0; 1892} 1893 1894static int thinkpad_acpi_driver_read(char *p) 1895{ 1896 int len = 0; 1897 1898 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC); 1899 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION); 1900 1901 return len; 1902} 1903 1904static struct ibm_struct thinkpad_acpi_driver_data = { 1905 .name = "driver", 1906 .read = thinkpad_acpi_driver_read, 1907}; 1908 1909/************************************************************************* 1910 * Hotkey subdriver 1911 */ 1912 1913/* 1914 * ThinkPad firmware event model 1915 * 1916 * The ThinkPad firmware has two main event interfaces: normal ACPI 1917 * notifications (which follow the ACPI standard), and a private event 1918 * interface. 1919 * 1920 * The private event interface also issues events for the hotkeys. As 1921 * the driver gained features, the event handling code ended up being 1922 * built around the hotkey subdriver. This will need to be refactored 1923 * to a more formal event API eventually. 1924 * 1925 * Some "hotkeys" are actually supposed to be used as event reports, 1926 * such as "brightness has changed", "volume has changed", depending on 1927 * the ThinkPad model and how the firmware is operating. 1928 * 1929 * Unlike other classes, hotkey-class events have mask/unmask control on 1930 * non-ancient firmware. However, how it behaves changes a lot with the 1931 * firmware model and version. 1932 */ 1933 1934enum { /* hot key scan codes (derived from ACPI DSDT) */ 1935 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1936 TP_ACPI_HOTKEYSCAN_FNF2, 1937 TP_ACPI_HOTKEYSCAN_FNF3, 1938 TP_ACPI_HOTKEYSCAN_FNF4, 1939 TP_ACPI_HOTKEYSCAN_FNF5, 1940 TP_ACPI_HOTKEYSCAN_FNF6, 1941 TP_ACPI_HOTKEYSCAN_FNF7, 1942 TP_ACPI_HOTKEYSCAN_FNF8, 1943 TP_ACPI_HOTKEYSCAN_FNF9, 1944 TP_ACPI_HOTKEYSCAN_FNF10, 1945 TP_ACPI_HOTKEYSCAN_FNF11, 1946 TP_ACPI_HOTKEYSCAN_FNF12, 1947 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1948 TP_ACPI_HOTKEYSCAN_FNINSERT, 1949 TP_ACPI_HOTKEYSCAN_FNDELETE, 1950 TP_ACPI_HOTKEYSCAN_FNHOME, 1951 TP_ACPI_HOTKEYSCAN_FNEND, 1952 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1953 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1954 TP_ACPI_HOTKEYSCAN_FNSPACE, 1955 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1956 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1957 TP_ACPI_HOTKEYSCAN_MUTE, 1958 TP_ACPI_HOTKEYSCAN_THINKPAD, 1959}; 1960 1961enum { /* Keys/events available through NVRAM polling */ 1962 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1963 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1964}; 1965 1966enum { /* Positions of some of the keys in hotkey masks */ 1967 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1968 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1969 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1970 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1971 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1972 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1973 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1974 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1975 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1976 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1977 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1978}; 1979 1980enum { /* NVRAM to ACPI HKEY group map */ 1981 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1982 TP_ACPI_HKEY_ZOOM_MASK | 1983 TP_ACPI_HKEY_DISPSWTCH_MASK | 1984 TP_ACPI_HKEY_HIBERNATE_MASK, 1985 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1986 TP_ACPI_HKEY_BRGHTDWN_MASK, 1987 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1988 TP_ACPI_HKEY_VOLDWN_MASK | 1989 TP_ACPI_HKEY_MUTE_MASK, 1990}; 1991 1992#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1993struct tp_nvram_state { 1994 u16 thinkpad_toggle:1; 1995 u16 zoom_toggle:1; 1996 u16 display_toggle:1; 1997 u16 thinklight_toggle:1; 1998 u16 hibernate_toggle:1; 1999 u16 displayexp_toggle:1; 2000 u16 display_state:1; 2001 u16 brightness_toggle:1; 2002 u16 volume_toggle:1; 2003 u16 mute:1; 2004 2005 u8 brightness_level; 2006 u8 volume_level; 2007}; 2008 2009/* kthread for the hotkey poller */ 2010static struct task_struct *tpacpi_hotkey_task; 2011 2012/* Acquired while the poller kthread is running, use to sync start/stop */ 2013static struct mutex hotkey_thread_mutex; 2014 2015/* 2016 * Acquire mutex to write poller control variables as an 2017 * atomic block. 2018 * 2019 * Increment hotkey_config_change when changing them if you 2020 * want the kthread to forget old state. 2021 * 2022 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2023 */ 2024static struct mutex hotkey_thread_data_mutex; 2025static unsigned int hotkey_config_change; 2026 2027/* 2028 * hotkey poller control variables 2029 * 2030 * Must be atomic or readers will also need to acquire mutex 2031 * 2032 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2033 * should be used only when the changes need to be taken as 2034 * a block, OR when one needs to force the kthread to forget 2035 * old state. 2036 */ 2037static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2038static unsigned int hotkey_poll_freq = 10; /* Hz */ 2039 2040#define HOTKEY_CONFIG_CRITICAL_START \ 2041 do { \ 2042 mutex_lock(&hotkey_thread_data_mutex); \ 2043 hotkey_config_change++; \ 2044 } while (0); 2045#define HOTKEY_CONFIG_CRITICAL_END \ 2046 mutex_unlock(&hotkey_thread_data_mutex); 2047 2048#else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2049 2050#define hotkey_source_mask 0U 2051#define HOTKEY_CONFIG_CRITICAL_START 2052#define HOTKEY_CONFIG_CRITICAL_END 2053 2054#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2055 2056static struct mutex hotkey_mutex; 2057 2058static enum { /* Reasons for waking up */ 2059 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2060 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2061 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2062} hotkey_wakeup_reason; 2063 2064static int hotkey_autosleep_ack; 2065 2066static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2067static u32 hotkey_all_mask; /* all events supported in fw */ 2068static u32 hotkey_reserved_mask; /* events better left disabled */ 2069static u32 hotkey_driver_mask; /* events needed by the driver */ 2070static u32 hotkey_user_mask; /* events visible to userspace */ 2071static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2072 2073static unsigned int hotkey_report_mode; 2074 2075static u16 *hotkey_keycode_map; 2076 2077static struct attribute_set *hotkey_dev_attributes; 2078 2079static void tpacpi_driver_event(const unsigned int hkey_event); 2080static void hotkey_driver_event(const unsigned int scancode); 2081 2082/* HKEY.MHKG() return bits */ 2083#define TP_HOTKEY_TABLET_MASK (1 << 3) 2084 2085static int hotkey_get_wlsw(void) 2086{ 2087 int status; 2088 2089 if (!tp_features.hotkey_wlsw) 2090 return -ENODEV; 2091 2092#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2093 if (dbg_wlswemul) 2094 return (tpacpi_wlsw_emulstate) ? 2095 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2096#endif 2097 2098 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2099 return -EIO; 2100 2101 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2102} 2103 2104static int hotkey_get_tablet_mode(int *status) 2105{ 2106 int s; 2107 2108 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2109 return -EIO; 2110 2111 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2112 return 0; 2113} 2114 2115/* 2116 * Reads current event mask from firmware, and updates 2117 * hotkey_acpi_mask accordingly. Also resets any bits 2118 * from hotkey_user_mask that are unavailable to be 2119 * delivered (shadow requirement of the userspace ABI). 2120 * 2121 * Call with hotkey_mutex held 2122 */ 2123static int hotkey_mask_get(void) 2124{ 2125 if (tp_features.hotkey_mask) { 2126 u32 m = 0; 2127 2128 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2129 return -EIO; 2130 2131 hotkey_acpi_mask = m; 2132 } else { 2133 /* no mask support doesn't mean no event support... */ 2134 hotkey_acpi_mask = hotkey_all_mask; 2135 } 2136 2137 /* sync userspace-visible mask */ 2138 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2139 2140 return 0; 2141} 2142 2143void static hotkey_mask_warn_incomplete_mask(void) 2144{ 2145 /* log only what the user can fix... */ 2146 const u32 wantedmask = hotkey_driver_mask & 2147 ~(hotkey_acpi_mask | hotkey_source_mask) & 2148 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2149 2150 if (wantedmask) 2151 printk(TPACPI_NOTICE 2152 "required events 0x%08x not enabled!\n", 2153 wantedmask); 2154} 2155 2156/* 2157 * Set the firmware mask when supported 2158 * 2159 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2160 * 2161 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2162 * 2163 * Call with hotkey_mutex held 2164 */ 2165static int hotkey_mask_set(u32 mask) 2166{ 2167 int i; 2168 int rc = 0; 2169 2170 const u32 fwmask = mask & ~hotkey_source_mask; 2171 2172 if (tp_features.hotkey_mask) { 2173 for (i = 0; i < 32; i++) { 2174 if (!acpi_evalf(hkey_handle, 2175 NULL, "MHKM", "vdd", i + 1, 2176 !!(mask & (1 << i)))) { 2177 rc = -EIO; 2178 break; 2179 } 2180 } 2181 } 2182 2183 /* 2184 * We *must* make an inconditional call to hotkey_mask_get to 2185 * refresh hotkey_acpi_mask and update hotkey_user_mask 2186 * 2187 * Take the opportunity to also log when we cannot _enable_ 2188 * a given event. 2189 */ 2190 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2191 printk(TPACPI_NOTICE 2192 "asked for hotkey mask 0x%08x, but " 2193 "firmware forced it to 0x%08x\n", 2194 fwmask, hotkey_acpi_mask); 2195 } 2196 2197 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2198 hotkey_mask_warn_incomplete_mask(); 2199 2200 return rc; 2201} 2202 2203/* 2204 * Sets hotkey_user_mask and tries to set the firmware mask 2205 * 2206 * Call with hotkey_mutex held 2207 */ 2208static int hotkey_user_mask_set(const u32 mask) 2209{ 2210 int rc; 2211 2212 /* Give people a chance to notice they are doing something that 2213 * is bound to go boom on their users sooner or later */ 2214 if (!tp_warned.hotkey_mask_ff && 2215 (mask == 0xffff || mask == 0xffffff || 2216 mask == 0xffffffff)) { 2217 tp_warned.hotkey_mask_ff = 1; 2218 printk(TPACPI_NOTICE 2219 "setting the hotkey mask to 0x%08x is likely " 2220 "not the best way to go about it\n", mask); 2221 printk(TPACPI_NOTICE 2222 "please consider using the driver defaults, " 2223 "and refer to up-to-date thinkpad-acpi " 2224 "documentation\n"); 2225 } 2226 2227 /* Try to enable what the user asked for, plus whatever we need. 2228 * this syncs everything but won't enable bits in hotkey_user_mask */ 2229 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2230 2231 /* Enable the available bits in hotkey_user_mask */ 2232 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2233 2234 return rc; 2235} 2236 2237/* 2238 * Sets the driver hotkey mask. 2239 * 2240 * Can be called even if the hotkey subdriver is inactive 2241 */ 2242static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2243{ 2244 int rc; 2245 2246 /* Do the right thing if hotkey_init has not been called yet */ 2247 if (!tp_features.hotkey) { 2248 hotkey_driver_mask = mask; 2249 return 0; 2250 } 2251 2252 mutex_lock(&hotkey_mutex); 2253 2254 HOTKEY_CONFIG_CRITICAL_START 2255 hotkey_driver_mask = mask; 2256#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2257 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2258#endif 2259 HOTKEY_CONFIG_CRITICAL_END 2260 2261 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2262 ~hotkey_source_mask); 2263 mutex_unlock(&hotkey_mutex); 2264 2265 return rc; 2266} 2267 2268static int hotkey_status_get(int *status) 2269{ 2270 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2271 return -EIO; 2272 2273 return 0; 2274} 2275 2276static int hotkey_status_set(bool enable) 2277{ 2278 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2279 return -EIO; 2280 2281 return 0; 2282} 2283 2284static void tpacpi_input_send_tabletsw(void) 2285{ 2286 int state; 2287 2288 if (tp_features.hotkey_tablet && 2289 !hotkey_get_tablet_mode(&state)) { 2290 mutex_lock(&tpacpi_inputdev_send_mutex); 2291 2292 input_report_switch(tpacpi_inputdev, 2293 SW_TABLET_MODE, !!state); 2294 input_sync(tpacpi_inputdev); 2295 2296 mutex_unlock(&tpacpi_inputdev_send_mutex); 2297 } 2298} 2299 2300/* Do NOT call without validating scancode first */ 2301static void tpacpi_input_send_key(const unsigned int scancode) 2302{ 2303 const unsigned int keycode = hotkey_keycode_map[scancode]; 2304 2305 if (keycode != KEY_RESERVED) { 2306 mutex_lock(&tpacpi_inputdev_send_mutex); 2307 2308 input_report_key(tpacpi_inputdev, keycode, 1); 2309 if (keycode == KEY_UNKNOWN) 2310 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, 2311 scancode); 2312 input_sync(tpacpi_inputdev); 2313 2314 input_report_key(tpacpi_inputdev, keycode, 0); 2315 if (keycode == KEY_UNKNOWN) 2316 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, 2317 scancode); 2318 input_sync(tpacpi_inputdev); 2319 2320 mutex_unlock(&tpacpi_inputdev_send_mutex); 2321 } 2322} 2323 2324/* Do NOT call without validating scancode first */ 2325static void tpacpi_input_send_key_masked(const unsigned int scancode) 2326{ 2327 hotkey_driver_event(scancode); 2328 if (hotkey_user_mask & (1 << scancode)) 2329 tpacpi_input_send_key(scancode); 2330} 2331 2332#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2333static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2334 2335/* Do NOT call without validating scancode first */ 2336static void tpacpi_hotkey_send_key(unsigned int scancode) 2337{ 2338 tpacpi_input_send_key_masked(scancode); 2339 if (hotkey_report_mode < 2) { 2340 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device, 2341 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode); 2342 } 2343} 2344 2345static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2346{ 2347 u8 d; 2348 2349 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2350 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2351 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2352 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2353 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2354 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2355 } 2356 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2357 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2358 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2359 } 2360 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2361 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2362 n->displayexp_toggle = 2363 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2364 } 2365 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2366 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2367 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2368 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2369 n->brightness_toggle = 2370 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2371 } 2372 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2373 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2374 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2375 >> TP_NVRAM_POS_LEVEL_VOLUME; 2376 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2377 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2378 } 2379} 2380 2381static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2382 struct tp_nvram_state *newn, 2383 const u32 event_mask) 2384{ 2385 2386#define TPACPI_COMPARE_KEY(__scancode, __member) \ 2387 do { \ 2388 if ((event_mask & (1 << __scancode)) && \ 2389 oldn->__member != newn->__member) \ 2390 tpacpi_hotkey_send_key(__scancode); \ 2391 } while (0) 2392 2393#define TPACPI_MAY_SEND_KEY(__scancode) \ 2394 do { \ 2395 if (event_mask & (1 << __scancode)) \ 2396 tpacpi_hotkey_send_key(__scancode); \ 2397 } while (0) 2398 2399 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2400 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2401 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2402 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2403 2404 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2405 2406 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2407 2408 /* handle volume */ 2409 if (oldn->volume_toggle != newn->volume_toggle) { 2410 if (oldn->mute != newn->mute) { 2411 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2412 } 2413 if (oldn->volume_level > newn->volume_level) { 2414 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2415 } else if (oldn->volume_level < newn->volume_level) { 2416 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2417 } else if (oldn->mute == newn->mute) { 2418 /* repeated key presses that didn't change state */ 2419 if (newn->mute) { 2420 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2421 } else if (newn->volume_level != 0) { 2422 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2423 } else { 2424 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2425 } 2426 } 2427 } 2428 2429 /* handle brightness */ 2430 if (oldn->brightness_toggle != newn->brightness_toggle) { 2431 if (oldn->brightness_level < newn->brightness_level) { 2432 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2433 } else if (oldn->brightness_level > newn->brightness_level) { 2434 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2435 } else { 2436 /* repeated key presses that didn't change state */ 2437 if (newn->brightness_level != 0) { 2438 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2439 } else { 2440 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2441 } 2442 } 2443 } 2444 2445#undef TPACPI_COMPARE_KEY 2446#undef TPACPI_MAY_SEND_KEY 2447} 2448 2449/* 2450 * Polling driver 2451 * 2452 * We track all events in hotkey_source_mask all the time, since 2453 * most of them are edge-based. We only issue those requested by 2454 * hotkey_user_mask or hotkey_driver_mask, though. 2455 */ 2456static int hotkey_kthread(void *data) 2457{ 2458 struct tp_nvram_state s[2]; 2459 u32 poll_mask, event_mask; 2460 unsigned int si, so; 2461 unsigned long t; 2462 unsigned int change_detector, must_reset; 2463 unsigned int poll_freq; 2464 2465 mutex_lock(&hotkey_thread_mutex); 2466 2467 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2468 goto exit; 2469 2470 set_freezable(); 2471 2472 so = 0; 2473 si = 1; 2474 t = 0; 2475 2476 /* Initial state for compares */ 2477 mutex_lock(&hotkey_thread_data_mutex); 2478 change_detector = hotkey_config_change; 2479 poll_mask = hotkey_source_mask; 2480 event_mask = hotkey_source_mask & 2481 (hotkey_driver_mask | hotkey_user_mask); 2482 poll_freq = hotkey_poll_freq; 2483 mutex_unlock(&hotkey_thread_data_mutex); 2484 hotkey_read_nvram(&s[so], poll_mask); 2485 2486 while (!kthread_should_stop()) { 2487 if (t == 0) { 2488 if (likely(poll_freq)) 2489 t = 1000/poll_freq; 2490 else 2491 t = 100; /* should never happen... */ 2492 } 2493 t = msleep_interruptible(t); 2494 if (unlikely(kthread_should_stop())) 2495 break; 2496 must_reset = try_to_freeze(); 2497 if (t > 0 && !must_reset) 2498 continue; 2499 2500 mutex_lock(&hotkey_thread_data_mutex); 2501 if (must_reset || hotkey_config_change != change_detector) { 2502 /* forget old state on thaw or config change */ 2503 si = so; 2504 t = 0; 2505 change_detector = hotkey_config_change; 2506 } 2507 poll_mask = hotkey_source_mask; 2508 event_mask = hotkey_source_mask & 2509 (hotkey_driver_mask | hotkey_user_mask); 2510 poll_freq = hotkey_poll_freq; 2511 mutex_unlock(&hotkey_thread_data_mutex); 2512 2513 if (likely(poll_mask)) { 2514 hotkey_read_nvram(&s[si], poll_mask); 2515 if (likely(si != so)) { 2516 hotkey_compare_and_issue_event(&s[so], &s[si], 2517 event_mask); 2518 } 2519 } 2520 2521 so = si; 2522 si ^= 1; 2523 } 2524 2525exit: 2526 mutex_unlock(&hotkey_thread_mutex); 2527 return 0; 2528} 2529 2530/* call with hotkey_mutex held */ 2531static void hotkey_poll_stop_sync(void) 2532{ 2533 if (tpacpi_hotkey_task) { 2534 if (frozen(tpacpi_hotkey_task) || 2535 freezing(tpacpi_hotkey_task)) 2536 thaw_process(tpacpi_hotkey_task); 2537 2538 kthread_stop(tpacpi_hotkey_task); 2539 tpacpi_hotkey_task = NULL; 2540 mutex_lock(&hotkey_thread_mutex); 2541 /* at this point, the thread did exit */ 2542 mutex_unlock(&hotkey_thread_mutex); 2543 } 2544} 2545 2546/* call with hotkey_mutex held */ 2547static void hotkey_poll_setup(bool may_warn) 2548{ 2549 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2550 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2551 2552 if (hotkey_poll_freq > 0 && 2553 (poll_driver_mask || 2554 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2555 if (!tpacpi_hotkey_task) { 2556 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2557 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2558 if (IS_ERR(tpacpi_hotkey_task)) { 2559 tpacpi_hotkey_task = NULL; 2560 printk(TPACPI_ERR 2561 "could not create kernel thread " 2562 "for hotkey polling\n"); 2563 } 2564 } 2565 } else { 2566 hotkey_poll_stop_sync(); 2567 if (may_warn && (poll_driver_mask || poll_user_mask) && 2568 hotkey_poll_freq == 0) { 2569 printk(TPACPI_NOTICE 2570 "hot keys 0x%08x and/or events 0x%08x " 2571 "require polling, which is currently " 2572 "disabled\n", 2573 poll_user_mask, poll_driver_mask); 2574 } 2575 } 2576} 2577 2578static void hotkey_poll_setup_safe(bool may_warn) 2579{ 2580 mutex_lock(&hotkey_mutex); 2581 hotkey_poll_setup(may_warn); 2582 mutex_unlock(&hotkey_mutex); 2583} 2584 2585/* call with hotkey_mutex held */ 2586static void hotkey_poll_set_freq(unsigned int freq) 2587{ 2588 if (!freq) 2589 hotkey_poll_stop_sync(); 2590 2591 hotkey_poll_freq = freq; 2592} 2593 2594#else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2595 2596static void hotkey_poll_setup_safe(bool __unused) 2597{ 2598} 2599 2600#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2601 2602static int hotkey_inputdev_open(struct input_dev *dev) 2603{ 2604 switch (tpacpi_lifecycle) { 2605 case TPACPI_LIFE_INIT: 2606 /* 2607 * hotkey_init will call hotkey_poll_setup_safe 2608 * at the appropriate moment 2609 */ 2610 return 0; 2611 case TPACPI_LIFE_EXITING: 2612 return -EBUSY; 2613 case TPACPI_LIFE_RUNNING: 2614 hotkey_poll_setup_safe(false); 2615 return 0; 2616 } 2617 2618 /* Should only happen if tpacpi_lifecycle is corrupt */ 2619 BUG(); 2620 return -EBUSY; 2621} 2622 2623static void hotkey_inputdev_close(struct input_dev *dev) 2624{ 2625 /* disable hotkey polling when possible */ 2626 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING && 2627 !(hotkey_source_mask & hotkey_driver_mask)) 2628 hotkey_poll_setup_safe(false); 2629} 2630 2631/* sysfs hotkey enable ------------------------------------------------- */ 2632static ssize_t hotkey_enable_show(struct device *dev, 2633 struct device_attribute *attr, 2634 char *buf) 2635{ 2636 int res, status; 2637 2638 printk_deprecated_attribute("hotkey_enable", 2639 "Hotkey reporting is always enabled"); 2640 2641 res = hotkey_status_get(&status); 2642 if (res) 2643 return res; 2644 2645 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2646} 2647 2648static ssize_t hotkey_enable_store(struct device *dev, 2649 struct device_attribute *attr, 2650 const char *buf, size_t count) 2651{ 2652 unsigned long t; 2653 2654 printk_deprecated_attribute("hotkey_enable", 2655 "Hotkeys can be disabled through hotkey_mask"); 2656 2657 if (parse_strtoul(buf, 1, &t)) 2658 return -EINVAL; 2659 2660 if (t == 0) 2661 return -EPERM; 2662 2663 return count; 2664} 2665 2666static struct device_attribute dev_attr_hotkey_enable = 2667 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO, 2668 hotkey_enable_show, hotkey_enable_store); 2669 2670/* sysfs hotkey mask --------------------------------------------------- */ 2671static ssize_t hotkey_mask_show(struct device *dev, 2672 struct device_attribute *attr, 2673 char *buf) 2674{ 2675 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2676} 2677 2678static ssize_t hotkey_mask_store(struct device *dev, 2679 struct device_attribute *attr, 2680 const char *buf, size_t count) 2681{ 2682 unsigned long t; 2683 int res; 2684 2685 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2686 return -EINVAL; 2687 2688 if (mutex_lock_killable(&hotkey_mutex)) 2689 return -ERESTARTSYS; 2690 2691 res = hotkey_user_mask_set(t); 2692 2693#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2694 hotkey_poll_setup(true); 2695#endif 2696 2697 mutex_unlock(&hotkey_mutex); 2698 2699 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2700 2701 return (res) ? res : count; 2702} 2703 2704static struct device_attribute dev_attr_hotkey_mask = 2705 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO, 2706 hotkey_mask_show, hotkey_mask_store); 2707 2708/* sysfs hotkey bios_enabled ------------------------------------------- */ 2709static ssize_t hotkey_bios_enabled_show(struct device *dev, 2710 struct device_attribute *attr, 2711 char *buf) 2712{ 2713 return sprintf(buf, "0\n"); 2714} 2715 2716static struct device_attribute dev_attr_hotkey_bios_enabled = 2717 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL); 2718 2719/* sysfs hotkey bios_mask ---------------------------------------------- */ 2720static ssize_t hotkey_bios_mask_show(struct device *dev, 2721 struct device_attribute *attr, 2722 char *buf) 2723{ 2724 printk_deprecated_attribute("hotkey_bios_mask", 2725 "This attribute is useless."); 2726 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2727} 2728 2729static struct device_attribute dev_attr_hotkey_bios_mask = 2730 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL); 2731 2732/* sysfs hotkey all_mask ----------------------------------------------- */ 2733static ssize_t hotkey_all_mask_show(struct device *dev, 2734 struct device_attribute *attr, 2735 char *buf) 2736{ 2737 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2738 hotkey_all_mask | hotkey_source_mask); 2739} 2740 2741static struct device_attribute dev_attr_hotkey_all_mask = 2742 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL); 2743 2744/* sysfs hotkey recommended_mask --------------------------------------- */ 2745static ssize_t hotkey_recommended_mask_show(struct device *dev, 2746 struct device_attribute *attr, 2747 char *buf) 2748{ 2749 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2750 (hotkey_all_mask | hotkey_source_mask) 2751 & ~hotkey_reserved_mask); 2752} 2753 2754static struct device_attribute dev_attr_hotkey_recommended_mask = 2755 __ATTR(hotkey_recommended_mask, S_IRUGO, 2756 hotkey_recommended_mask_show, NULL); 2757 2758#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2759 2760/* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2761static ssize_t hotkey_source_mask_show(struct device *dev, 2762 struct device_attribute *attr, 2763 char *buf) 2764{ 2765 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2766} 2767 2768static ssize_t hotkey_source_mask_store(struct device *dev, 2769 struct device_attribute *attr, 2770 const char *buf, size_t count) 2771{ 2772 unsigned long t; 2773 u32 r_ev; 2774 int rc; 2775 2776 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2777 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2778 return -EINVAL; 2779 2780 if (mutex_lock_killable(&hotkey_mutex)) 2781 return -ERESTARTSYS; 2782 2783 HOTKEY_CONFIG_CRITICAL_START 2784 hotkey_source_mask = t; 2785 HOTKEY_CONFIG_CRITICAL_END 2786 2787 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2788 ~hotkey_source_mask); 2789 hotkey_poll_setup(true); 2790 2791 /* check if events needed by the driver got disabled */ 2792 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2793 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2794 2795 mutex_unlock(&hotkey_mutex); 2796 2797 if (rc < 0) 2798 printk(TPACPI_ERR "hotkey_source_mask: failed to update the" 2799 "firmware event mask!\n"); 2800 2801 if (r_ev) 2802 printk(TPACPI_NOTICE "hotkey_source_mask: " 2803 "some important events were disabled: " 2804 "0x%04x\n", r_ev); 2805 2806 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2807 2808 return (rc < 0) ? rc : count; 2809} 2810 2811static struct device_attribute dev_attr_hotkey_source_mask = 2812 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO, 2813 hotkey_source_mask_show, hotkey_source_mask_store); 2814 2815/* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2816static ssize_t hotkey_poll_freq_show(struct device *dev, 2817 struct device_attribute *attr, 2818 char *buf) 2819{ 2820 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2821} 2822 2823static ssize_t hotkey_poll_freq_store(struct device *dev, 2824 struct device_attribute *attr, 2825 const char *buf, size_t count) 2826{ 2827 unsigned long t; 2828 2829 if (parse_strtoul(buf, 25, &t)) 2830 return -EINVAL; 2831 2832 if (mutex_lock_killable(&hotkey_mutex)) 2833 return -ERESTARTSYS; 2834 2835 hotkey_poll_set_freq(t); 2836 hotkey_poll_setup(true); 2837 2838 mutex_unlock(&hotkey_mutex); 2839 2840 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2841 2842 return count; 2843} 2844 2845static struct device_attribute dev_attr_hotkey_poll_freq = 2846 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO, 2847 hotkey_poll_freq_show, hotkey_poll_freq_store); 2848 2849#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2850 2851/* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2852static ssize_t hotkey_radio_sw_show(struct device *dev, 2853 struct device_attribute *attr, 2854 char *buf) 2855{ 2856 int res; 2857 res = hotkey_get_wlsw(); 2858 if (res < 0) 2859 return res; 2860 2861 /* Opportunistic update */ 2862 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2863 2864 return snprintf(buf, PAGE_SIZE, "%d\n", 2865 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2866} 2867 2868static struct device_attribute dev_attr_hotkey_radio_sw = 2869 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL); 2870 2871static void hotkey_radio_sw_notify_change(void) 2872{ 2873 if (tp_features.hotkey_wlsw) 2874 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2875 "hotkey_radio_sw"); 2876} 2877 2878/* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2879static ssize_t hotkey_tablet_mode_show(struct device *dev, 2880 struct device_attribute *attr, 2881 char *buf) 2882{ 2883 int res, s; 2884 res = hotkey_get_tablet_mode(&s); 2885 if (res < 0) 2886 return res; 2887 2888 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2889} 2890 2891static struct device_attribute dev_attr_hotkey_tablet_mode = 2892 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL); 2893 2894static void hotkey_tablet_mode_notify_change(void) 2895{ 2896 if (tp_features.hotkey_tablet) 2897 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2898 "hotkey_tablet_mode"); 2899} 2900 2901/* sysfs hotkey report_mode -------------------------------------------- */ 2902static ssize_t hotkey_report_mode_show(struct device *dev, 2903 struct device_attribute *attr, 2904 char *buf) 2905{ 2906 return snprintf(buf, PAGE_SIZE, "%d\n", 2907 (hotkey_report_mode != 0) ? hotkey_report_mode : 1); 2908} 2909 2910static struct device_attribute dev_attr_hotkey_report_mode = 2911 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL); 2912 2913/* sysfs wakeup reason (pollable) -------------------------------------- */ 2914static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2915 struct device_attribute *attr, 2916 char *buf) 2917{ 2918 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2919} 2920 2921static struct device_attribute dev_attr_hotkey_wakeup_reason = 2922 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2923 2924static void hotkey_wakeup_reason_notify_change(void) 2925{ 2926 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2927 "wakeup_reason"); 2928} 2929 2930/* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2931static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2932 struct device_attribute *attr, 2933 char *buf) 2934{ 2935 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2936} 2937 2938static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete = 2939 __ATTR(wakeup_hotunplug_complete, S_IRUGO, 2940 hotkey_wakeup_hotunplug_complete_show, NULL); 2941 2942static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2943{ 2944 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2945 "wakeup_hotunplug_complete"); 2946} 2947 2948/* --------------------------------------------------------------------- */ 2949 2950static struct attribute *hotkey_attributes[] __initdata = { 2951 &dev_attr_hotkey_enable.attr, 2952 &dev_attr_hotkey_bios_enabled.attr, 2953 &dev_attr_hotkey_bios_mask.attr, 2954 &dev_attr_hotkey_report_mode.attr, 2955 &dev_attr_hotkey_wakeup_reason.attr, 2956 &dev_attr_hotkey_wakeup_hotunplug_complete.attr, 2957 &dev_attr_hotkey_mask.attr, 2958 &dev_attr_hotkey_all_mask.attr, 2959 &dev_attr_hotkey_recommended_mask.attr, 2960#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2961 &dev_attr_hotkey_source_mask.attr, 2962 &dev_attr_hotkey_poll_freq.attr, 2963#endif 2964}; 2965 2966/* 2967 * Sync both the hw and sw blocking state of all switches 2968 */ 2969static void tpacpi_send_radiosw_update(void) 2970{ 2971 int wlsw; 2972 2973 /* 2974 * We must sync all rfkill controllers *before* issuing any 2975 * rfkill input events, or we will race the rfkill core input 2976 * handler. 2977 * 2978 * tpacpi_inputdev_send_mutex works as a syncronization point 2979 * for the above. 2980 * 2981 * We optimize to avoid numerous calls to hotkey_get_wlsw. 2982 */ 2983 2984 wlsw = hotkey_get_wlsw(); 2985 2986 /* Sync hw blocking state first if it is hw-blocked */ 2987 if (wlsw == TPACPI_RFK_RADIO_OFF) 2988 tpacpi_rfk_update_hwblock_state(true); 2989 2990 /* Sync sw blocking state */ 2991 tpacpi_rfk_update_swstate_all(); 2992 2993 /* Sync hw blocking state last if it is hw-unblocked */ 2994 if (wlsw == TPACPI_RFK_RADIO_ON) 2995 tpacpi_rfk_update_hwblock_state(false); 2996 2997 /* Issue rfkill input event for WLSW switch */ 2998 if (!(wlsw < 0)) { 2999 mutex_lock(&tpacpi_inputdev_send_mutex); 3000 3001 input_report_switch(tpacpi_inputdev, 3002 SW_RFKILL_ALL, (wlsw > 0)); 3003 input_sync(tpacpi_inputdev); 3004 3005 mutex_unlock(&tpacpi_inputdev_send_mutex); 3006 } 3007 3008 /* 3009 * this can be unconditional, as we will poll state again 3010 * if userspace uses the notify to read data 3011 */ 3012 hotkey_radio_sw_notify_change(); 3013} 3014 3015static void hotkey_exit(void) 3016{ 3017#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3018 mutex_lock(&hotkey_mutex); 3019 hotkey_poll_stop_sync(); 3020 mutex_unlock(&hotkey_mutex); 3021#endif 3022 3023 if (hotkey_dev_attributes) 3024 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3025 3026 kfree(hotkey_keycode_map); 3027 3028 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3029 "restoring original HKEY status and mask\n"); 3030 /* yes, there is a bitwise or below, we want the 3031 * functions to be called even if one of them fail */ 3032 if (((tp_features.hotkey_mask && 3033 hotkey_mask_set(hotkey_orig_mask)) | 3034 hotkey_status_set(false)) != 0) 3035 printk(TPACPI_ERR 3036 "failed to restore hot key mask " 3037 "to BIOS defaults\n"); 3038} 3039 3040static void __init hotkey_unmap(const unsigned int scancode) 3041{ 3042 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3043 clear_bit(hotkey_keycode_map[scancode], 3044 tpacpi_inputdev->keybit); 3045 hotkey_keycode_map[scancode] = KEY_RESERVED; 3046 } 3047} 3048 3049/* 3050 * HKEY quirks: 3051 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3052 */ 3053 3054#define TPACPI_HK_Q_INIMASK 0x0001 3055 3056static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3057 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3058 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3059 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3060 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3061 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3062 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3063 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3064 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3065 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3066 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3067 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3068 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3069 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3070 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3071 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3072 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3073 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3074 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3075 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3076}; 3077 3078static int __init hotkey_init(struct ibm_init_struct *iibm) 3079{ 3080 /* Requirements for changing the default keymaps: 3081 * 3082 * 1. Many of the keys are mapped to KEY_RESERVED for very 3083 * good reasons. Do not change them unless you have deep 3084 * knowledge on the IBM and Lenovo ThinkPad firmware for 3085 * the various ThinkPad models. The driver behaves 3086 * differently for KEY_RESERVED: such keys have their 3087 * hot key mask *unset* in mask_recommended, and also 3088 * in the initial hot key mask programmed into the 3089 * firmware at driver load time, which means the firm- 3090 * ware may react very differently if you change them to 3091 * something else; 3092 * 3093 * 2. You must be subscribed to the linux-thinkpad and 3094 * ibm-acpi-devel mailing lists, and you should read the 3095 * list archives since 2007 if you want to change the 3096 * keymaps. This requirement exists so that you will 3097 * know the past history of problems with the thinkpad- 3098 * acpi driver keymaps, and also that you will be 3099 * listening to any bug reports; 3100 * 3101 * 3. Do not send thinkpad-acpi specific patches directly to 3102 * for merging, *ever*. Send them to the linux-acpi 3103 * mailinglist for comments. Merging is to be done only 3104 * through acpi-test and the ACPI maintainer. 3105 * 3106 * If the above is too much to ask, don't change the keymap. 3107 * Ask the thinkpad-acpi maintainer to do it, instead. 3108 */ 3109 static u16 ibm_keycode_map[] __initdata = { 3110 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3111 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP, 3112 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3113 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3114 3115 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3116 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3117 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3118 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3119 3120 /* brightness: firmware always reacts to them */ 3121 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3122 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3123 3124 /* Thinklight: firmware always react to it */ 3125 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3126 3127 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3128 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3129 3130 /* Volume: firmware always react to it and reprograms 3131 * the built-in *extra* mixer. Never map it to control 3132 * another mixer by default. */ 3133 KEY_RESERVED, /* 0x14: VOLUME UP */ 3134 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3135 KEY_RESERVED, /* 0x16: MUTE */ 3136 3137 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3138 3139 /* (assignments unknown, please report if found) */ 3140 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3141 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3142 }; 3143 static u16 lenovo_keycode_map[] __initdata = { 3144 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3145 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3146 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3147 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3148 3149 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3150 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3151 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3152 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3153 3154 /* These should be enabled --only-- when ACPI video 3155 * is disabled (i.e. in "vendor" mode), and are handled 3156 * in a special way by the init code */ 3157 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3158 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3159 3160 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3161 3162 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3163 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3164 3165 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3166 * react to it and reprograms the built-in *extra* mixer. 3167 * Never map it to control another mixer by default. 3168 * 3169 * T60?, T61, R60?, R61: firmware and EC tries to send 3170 * these over the regular keyboard, so these are no-ops, 3171 * but there are still weird bugs re. MUTE, so do not 3172 * change unless you get test reports from all Lenovo 3173 * models. May cause the BIOS to interfere with the 3174 * HDA mixer. 3175 */ 3176 KEY_RESERVED, /* 0x14: VOLUME UP */ 3177 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3178 KEY_RESERVED, /* 0x16: MUTE */ 3179 3180 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3181 3182 /* (assignments unknown, please report if found) */ 3183 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3184 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3185 }; 3186 3187#define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map) 3188#define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map) 3189#define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0]) 3190 3191 int res, i; 3192 int status; 3193 int hkeyv; 3194 bool radiosw_state = false; 3195 bool tabletsw_state = false; 3196 3197 unsigned long quirks; 3198 3199 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3200 "initializing hotkey subdriver\n"); 3201 3202 BUG_ON(!tpacpi_inputdev); 3203 BUG_ON(tpacpi_inputdev->open != NULL || 3204 tpacpi_inputdev->close != NULL); 3205 3206 TPACPI_ACPIHANDLE_INIT(hkey); 3207 mutex_init(&hotkey_mutex); 3208 3209#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3210 mutex_init(&hotkey_thread_mutex); 3211 mutex_init(&hotkey_thread_data_mutex); 3212#endif 3213 3214 /* hotkey not supported on 570 */ 3215 tp_features.hotkey = hkey_handle != NULL; 3216 3217 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3218 "hotkeys are %s\n", 3219 str_supported(tp_features.hotkey)); 3220 3221 if (!tp_features.hotkey) 3222 return 1; 3223 3224 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3225 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3226 3227 tpacpi_disable_brightness_delay(); 3228 3229 /* MUST have enough space for all attributes to be added to 3230 * hotkey_dev_attributes */ 3231 hotkey_dev_attributes = create_attr_set( 3232 ARRAY_SIZE(hotkey_attributes) + 2, 3233 NULL); 3234 if (!hotkey_dev_attributes) 3235 return -ENOMEM; 3236 res = add_many_to_attr_set(hotkey_dev_attributes, 3237 hotkey_attributes, 3238 ARRAY_SIZE(hotkey_attributes)); 3239 if (res) 3240 goto err_exit; 3241 3242 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3243 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3244 for HKEY interface version 0x100 */ 3245 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3246 if ((hkeyv >> 8) != 1) { 3247 printk(TPACPI_ERR "unknown version of the " 3248 "HKEY interface: 0x%x\n", hkeyv); 3249 printk(TPACPI_ERR "please report this to %s\n", 3250 TPACPI_MAIL); 3251 } else { 3252 /* 3253 * MHKV 0x100 in A31, R40, R40e, 3254 * T4x, X31, and later 3255 */ 3256 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3257 "firmware HKEY interface version: 0x%x\n", 3258 hkeyv); 3259 3260 /* Paranoia check AND init hotkey_all_mask */ 3261 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3262 "MHKA", "qd")) { 3263 printk(TPACPI_ERR 3264 "missing MHKA handler, " 3265 "please report this to %s\n", 3266 TPACPI_MAIL); 3267 /* Fallback: pre-init for FN+F3,F4,F12 */ 3268 hotkey_all_mask = 0x080cU; 3269 } else { 3270 tp_features.hotkey_mask = 1; 3271 } 3272 } 3273 } 3274 3275 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3276 "hotkey masks are %s\n", 3277 str_supported(tp_features.hotkey_mask)); 3278 3279 /* Init hotkey_all_mask if not initialized yet */ 3280 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3281 (quirks & TPACPI_HK_Q_INIMASK)) 3282 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3283 3284 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3285 if (tp_features.hotkey_mask) { 3286 /* hotkey_source_mask *must* be zero for 3287 * the first hotkey_mask_get to return hotkey_orig_mask */ 3288 res = hotkey_mask_get(); 3289 if (res) 3290 goto err_exit; 3291 3292 hotkey_orig_mask = hotkey_acpi_mask; 3293 } else { 3294 hotkey_orig_mask = hotkey_all_mask; 3295 hotkey_acpi_mask = hotkey_all_mask; 3296 } 3297 3298#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3299 if (dbg_wlswemul) { 3300 tp_features.hotkey_wlsw = 1; 3301 radiosw_state = !!tpacpi_wlsw_emulstate; 3302 printk(TPACPI_INFO 3303 "radio switch emulation enabled\n"); 3304 } else 3305#endif 3306 /* Not all thinkpads have a hardware radio switch */ 3307 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3308 tp_features.hotkey_wlsw = 1; 3309 radiosw_state = !!status; 3310 printk(TPACPI_INFO 3311 "radio switch found; radios are %s\n", 3312 enabled(status, 0)); 3313 } 3314 if (tp_features.hotkey_wlsw) 3315 res = add_to_attr_set(hotkey_dev_attributes, 3316 &dev_attr_hotkey_radio_sw.attr); 3317 3318 /* For X41t, X60t, X61t Tablets... */ 3319 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3320 tp_features.hotkey_tablet = 1; 3321 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); 3322 printk(TPACPI_INFO 3323 "possible tablet mode switch found; " 3324 "ThinkPad in %s mode\n", 3325 (tabletsw_state) ? "tablet" : "laptop"); 3326 res = add_to_attr_set(hotkey_dev_attributes, 3327 &dev_attr_hotkey_tablet_mode.attr); 3328 } 3329 3330 if (!res) 3331 res = register_attr_set_with_sysfs( 3332 hotkey_dev_attributes, 3333 &tpacpi_pdev->dev.kobj); 3334 if (res) 3335 goto err_exit; 3336 3337 /* Set up key map */ 3338 3339 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3340 GFP_KERNEL); 3341 if (!hotkey_keycode_map) { 3342 printk(TPACPI_ERR 3343 "failed to allocate memory for key map\n"); 3344 res = -ENOMEM; 3345 goto err_exit; 3346 } 3347 3348 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) { 3349 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3350 "using Lenovo default hot key map\n"); 3351 memcpy(hotkey_keycode_map, &lenovo_keycode_map, 3352 TPACPI_HOTKEY_MAP_SIZE); 3353 } else { 3354 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3355 "using IBM default hot key map\n"); 3356 memcpy(hotkey_keycode_map, &ibm_keycode_map, 3357 TPACPI_HOTKEY_MAP_SIZE); 3358 } 3359 3360 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3361 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3362 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3363 tpacpi_inputdev->keycode = hotkey_keycode_map; 3364 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3365 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3366 input_set_capability(tpacpi_inputdev, EV_KEY, 3367 hotkey_keycode_map[i]); 3368 } else { 3369 if (i < sizeof(hotkey_reserved_mask)*8) 3370 hotkey_reserved_mask |= 1 << i; 3371 } 3372 } 3373 3374 if (tp_features.hotkey_wlsw) { 3375 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3376 input_report_switch(tpacpi_inputdev, 3377 SW_RFKILL_ALL, radiosw_state); 3378 } 3379 if (tp_features.hotkey_tablet) { 3380 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3381 input_report_switch(tpacpi_inputdev, 3382 SW_TABLET_MODE, tabletsw_state); 3383 } 3384 3385 /* Do not issue duplicate brightness change events to 3386 * userspace */ 3387 if (!tp_features.bright_acpimode) 3388 /* update bright_acpimode... */ 3389 tpacpi_check_std_acpi_brightness_support(); 3390 3391 if (tp_features.bright_acpimode && acpi_video_backlight_support()) { 3392 printk(TPACPI_INFO 3393 "This ThinkPad has standard ACPI backlight " 3394 "brightness control, supported by the ACPI " 3395 "video driver\n"); 3396 printk(TPACPI_NOTICE 3397 "Disabling thinkpad-acpi brightness events " 3398 "by default...\n"); 3399 3400 /* Disable brightness up/down on Lenovo thinkpads when 3401 * ACPI is handling them, otherwise it is plain impossible 3402 * for userspace to do something even remotely sane */ 3403 hotkey_reserved_mask |= 3404 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3405 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3406 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3407 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3408 } 3409 3410#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3411 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3412 & ~hotkey_all_mask 3413 & ~hotkey_reserved_mask; 3414 3415 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3416 "hotkey source mask 0x%08x, polling freq %u\n", 3417 hotkey_source_mask, hotkey_poll_freq); 3418#endif 3419 3420 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3421 "enabling firmware HKEY event interface...\n"); 3422 res = hotkey_status_set(true); 3423 if (res) { 3424 hotkey_exit(); 3425 return res; 3426 } 3427 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3428 | hotkey_driver_mask) 3429 & ~hotkey_source_mask); 3430 if (res < 0 && res != -ENXIO) { 3431 hotkey_exit(); 3432 return res; 3433 } 3434 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3435 & ~hotkey_reserved_mask; 3436 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3437 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3438 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3439 3440 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3441 "legacy ibm/hotkey event reporting over procfs %s\n", 3442 (hotkey_report_mode < 2) ? 3443 "enabled" : "disabled"); 3444 3445 tpacpi_inputdev->open = &hotkey_inputdev_open; 3446 tpacpi_inputdev->close = &hotkey_inputdev_close; 3447 3448 hotkey_poll_setup_safe(true); 3449 3450 return 0; 3451 3452err_exit: 3453 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3454 hotkey_dev_attributes = NULL; 3455 3456 return (res < 0)? res : 1; 3457} 3458 3459static bool hotkey_notify_hotkey(const u32 hkey, 3460 bool *send_acpi_ev, 3461 bool *ignore_acpi_ev) 3462{ 3463 /* 0x1000-0x1FFF: key presses */ 3464 unsigned int scancode = hkey & 0xfff; 3465 *send_acpi_ev = true; 3466 *ignore_acpi_ev = false; 3467 3468 if (scancode > 0 && scancode < 0x21) { 3469 scancode--; 3470 if (!(hotkey_source_mask & (1 << scancode))) { 3471 tpacpi_input_send_key_masked(scancode); 3472 *send_acpi_ev = false; 3473 } else { 3474 *ignore_acpi_ev = true; 3475 } 3476 return true; 3477 } 3478 return false; 3479} 3480 3481static bool hotkey_notify_wakeup(const u32 hkey, 3482 bool *send_acpi_ev, 3483 bool *ignore_acpi_ev) 3484{ 3485 /* 0x2000-0x2FFF: Wakeup reason */ 3486 *send_acpi_ev = true; 3487 *ignore_acpi_ev = false; 3488 3489 switch (hkey) { 3490 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3491 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3492 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3493 *ignore_acpi_ev = true; 3494 break; 3495 3496 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3497 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3498 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3499 *ignore_acpi_ev = true; 3500 break; 3501 3502 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3503 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3504 printk(TPACPI_ALERT 3505 "EMERGENCY WAKEUP: battery almost empty\n"); 3506 /* how to auto-heal: */ 3507 /* 2313: woke up from S3, go to S4/S5 */ 3508 /* 2413: woke up from S4, go to S5 */ 3509 break; 3510 3511 default: 3512 return false; 3513 } 3514 3515 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3516 printk(TPACPI_INFO 3517 "woke up due to a hot-unplug " 3518 "request...\n"); 3519 hotkey_wakeup_reason_notify_change(); 3520 } 3521 return true; 3522} 3523 3524static bool hotkey_notify_usrevent(const u32 hkey, 3525 bool *send_acpi_ev, 3526 bool *ignore_acpi_ev) 3527{ 3528 /* 0x5000-0x5FFF: human interface helpers */ 3529 *send_acpi_ev = true; 3530 *ignore_acpi_ev = false; 3531 3532 switch (hkey) { 3533 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3534 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3535 return true; 3536 3537 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3538 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3539 tpacpi_input_send_tabletsw(); 3540 hotkey_tablet_mode_notify_change(); 3541 *send_acpi_ev = false; 3542 return true; 3543 3544 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3545 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3546 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3547 /* do not propagate these events */ 3548 *ignore_acpi_ev = true; 3549 return true; 3550 3551 default: 3552 return false; 3553 } 3554} 3555 3556static void thermal_dump_all_sensors(void); 3557 3558static bool hotkey_notify_thermal(const u32 hkey, 3559 bool *send_acpi_ev, 3560 bool *ignore_acpi_ev) 3561{ 3562 bool known = true; 3563 3564 /* 0x6000-0x6FFF: thermal alarms */ 3565 *send_acpi_ev = true; 3566 *ignore_acpi_ev = false; 3567 3568 switch (hkey) { 3569 case TP_HKEY_EV_THM_TABLE_CHANGED: 3570 printk(TPACPI_INFO 3571 "EC reports that Thermal Table has changed\n"); 3572 /* recommended action: do nothing, we don't have 3573 * Lenovo ATM information */ 3574 return true; 3575 case TP_HKEY_EV_ALARM_BAT_HOT: 3576 printk(TPACPI_CRIT 3577 "THERMAL ALARM: battery is too hot!\n"); 3578 /* recommended action: warn user through gui */ 3579 break; 3580 case TP_HKEY_EV_ALARM_BAT_XHOT: 3581 printk(TPACPI_ALERT 3582 "THERMAL EMERGENCY: battery is extremely hot!\n"); 3583 /* recommended action: immediate sleep/hibernate */ 3584 break; 3585 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3586 printk(TPACPI_CRIT 3587 "THERMAL ALARM: " 3588 "a sensor reports something is too hot!\n"); 3589 /* recommended action: warn user through gui, that */ 3590 /* some internal component is too hot */ 3591 break; 3592 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3593 printk(TPACPI_ALERT 3594 "THERMAL EMERGENCY: " 3595 "a sensor reports something is extremely hot!\n"); 3596 /* recommended action: immediate sleep/hibernate */ 3597 break; 3598 default: 3599 printk(TPACPI_ALERT 3600 "THERMAL ALERT: unknown thermal alarm received\n"); 3601 known = false; 3602 } 3603 3604 thermal_dump_all_sensors(); 3605 3606 return known; 3607} 3608 3609static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3610{ 3611 u32 hkey; 3612 bool send_acpi_ev; 3613 bool ignore_acpi_ev; 3614 bool known_ev; 3615 3616 if (event != 0x80) { 3617 printk(TPACPI_ERR 3618 "unknown HKEY notification event %d\n", event); 3619 /* forward it to userspace, maybe it knows how to handle it */ 3620 acpi_bus_generate_netlink_event( 3621 ibm->acpi->device->pnp.device_class, 3622 dev_name(&ibm->acpi->device->dev), 3623 event, 0); 3624 return; 3625 } 3626 3627 while (1) { 3628 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3629 printk(TPACPI_ERR "failed to retrieve HKEY event\n"); 3630 return; 3631 } 3632 3633 if (hkey == 0) { 3634 /* queue empty */ 3635 return; 3636 } 3637 3638 send_acpi_ev = true; 3639 ignore_acpi_ev = false; 3640 3641 switch (hkey >> 12) { 3642 case 1: 3643 /* 0x1000-0x1FFF: key presses */ 3644 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3645 &ignore_acpi_ev); 3646 break; 3647 case 2: 3648 /* 0x2000-0x2FFF: Wakeup reason */ 3649 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3650 &ignore_acpi_ev); 3651 break; 3652 case 3: 3653 /* 0x3000-0x3FFF: bay-related wakeups */ 3654 if (hkey == TP_HKEY_EV_BAYEJ_ACK) { 3655 hotkey_autosleep_ack = 1; 3656 printk(TPACPI_INFO 3657 "bay ejected\n"); 3658 hotkey_wakeup_hotunplug_complete_notify_change(); 3659 known_ev = true; 3660 } else { 3661 known_ev = false; 3662 } 3663 break; 3664 case 4: 3665 /* 0x4000-0x4FFF: dock-related wakeups */ 3666 if (hkey == TP_HKEY_EV_UNDOCK_ACK) { 3667 hotkey_autosleep_ack = 1; 3668 printk(TPACPI_INFO 3669 "undocked\n"); 3670 hotkey_wakeup_hotunplug_complete_notify_change(); 3671 known_ev = true; 3672 } else { 3673 known_ev = false; 3674 } 3675 break; 3676 case 5: 3677 /* 0x5000-0x5FFF: human interface helpers */ 3678 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3679 &ignore_acpi_ev); 3680 break; 3681 case 6: 3682 /* 0x6000-0x6FFF: thermal alarms */ 3683 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev, 3684 &ignore_acpi_ev); 3685 break; 3686 case 7: 3687 /* 0x7000-0x7FFF: misc */ 3688 if (tp_features.hotkey_wlsw && 3689 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3690 tpacpi_send_radiosw_update(); 3691 send_acpi_ev = 0; 3692 known_ev = true; 3693 break; 3694 } 3695 /* fallthrough to default */ 3696 default: 3697 known_ev = false; 3698 } 3699 if (!known_ev) { 3700 printk(TPACPI_NOTICE 3701 "unhandled HKEY event 0x%04x\n", hkey); 3702 printk(TPACPI_NOTICE 3703 "please report the conditions when this " 3704 "event happened to %s\n", TPACPI_MAIL); 3705 } 3706 3707 /* Legacy events */ 3708 if (!ignore_acpi_ev && 3709 (send_acpi_ev || hotkey_report_mode < 2)) { 3710 acpi_bus_generate_proc_event(ibm->acpi->device, 3711 event, hkey); 3712 } 3713 3714 /* netlink events */ 3715 if (!ignore_acpi_ev && send_acpi_ev) { 3716 acpi_bus_generate_netlink_event( 3717 ibm->acpi->device->pnp.device_class, 3718 dev_name(&ibm->acpi->device->dev), 3719 event, hkey); 3720 } 3721 } 3722} 3723 3724static void hotkey_suspend(pm_message_t state) 3725{ 3726 /* Do these on suspend, we get the events on early resume! */ 3727 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 3728 hotkey_autosleep_ack = 0; 3729} 3730 3731static void hotkey_resume(void) 3732{ 3733 tpacpi_disable_brightness_delay(); 3734 3735 if (hotkey_status_set(true) < 0 || 3736 hotkey_mask_set(hotkey_acpi_mask) < 0) 3737 printk(TPACPI_ERR 3738 "error while attempting to reset the event " 3739 "firmware interface\n"); 3740 3741 tpacpi_send_radiosw_update(); 3742 hotkey_tablet_mode_notify_change(); 3743 hotkey_wakeup_reason_notify_change(); 3744 hotkey_wakeup_hotunplug_complete_notify_change(); 3745 hotkey_poll_setup_safe(false); 3746} 3747 3748/* procfs -------------------------------------------------------------- */ 3749static int hotkey_read(char *p) 3750{ 3751 int res, status; 3752 int len = 0; 3753 3754 if (!tp_features.hotkey) { 3755 len += sprintf(p + len, "status:\t\tnot supported\n"); 3756 return len; 3757 } 3758 3759 if (mutex_lock_killable(&hotkey_mutex)) 3760 return -ERESTARTSYS; 3761 res = hotkey_status_get(&status); 3762 if (!res) 3763 res = hotkey_mask_get(); 3764 mutex_unlock(&hotkey_mutex); 3765 if (res) 3766 return res; 3767 3768 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0)); 3769 if (hotkey_all_mask) { 3770 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_user_mask); 3771 len += sprintf(p + len, 3772 "commands:\tenable, disable, reset, <mask>\n"); 3773 } else { 3774 len += sprintf(p + len, "mask:\t\tnot supported\n"); 3775 len += sprintf(p + len, "commands:\tenable, disable, reset\n"); 3776 } 3777 3778 return len; 3779} 3780 3781static void hotkey_enabledisable_warn(bool enable) 3782{ 3783 tpacpi_log_usertask("procfs hotkey enable/disable"); 3784 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 3785 TPACPI_WARN 3786 "hotkey enable/disable functionality has been " 3787 "removed from the driver. Hotkeys are always " 3788 "enabled\n")) 3789 printk(TPACPI_ERR 3790 "Please remove the hotkey=enable module " 3791 "parameter, it is deprecated. Hotkeys are always " 3792 "enabled\n"); 3793} 3794 3795static int hotkey_write(char *buf) 3796{ 3797 int res; 3798 u32 mask; 3799 char *cmd; 3800 3801 if (!tp_features.hotkey) 3802 return -ENODEV; 3803 3804 if (mutex_lock_killable(&hotkey_mutex)) 3805 return -ERESTARTSYS; 3806 3807 mask = hotkey_user_mask; 3808 3809 res = 0; 3810 while ((cmd = next_cmd(&buf))) { 3811 if (strlencmp(cmd, "enable") == 0) { 3812 hotkey_enabledisable_warn(1); 3813 } else if (strlencmp(cmd, "disable") == 0) { 3814 hotkey_enabledisable_warn(0); 3815 res = -EPERM; 3816 } else if (strlencmp(cmd, "reset") == 0) { 3817 mask = (hotkey_all_mask | hotkey_source_mask) 3818 & ~hotkey_reserved_mask; 3819 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 3820 /* mask set */ 3821 } else if (sscanf(cmd, "%x", &mask) == 1) { 3822 /* mask set */ 3823 } else { 3824 res = -EINVAL; 3825 goto errexit; 3826 } 3827 } 3828 3829 if (!res) { 3830 tpacpi_disclose_usertask("procfs hotkey", 3831 "set mask to 0x%08x\n", mask); 3832 res = hotkey_user_mask_set(mask); 3833 } 3834 3835errexit: 3836 mutex_unlock(&hotkey_mutex); 3837 return res; 3838} 3839 3840static const struct acpi_device_id ibm_htk_device_ids[] = { 3841 {TPACPI_ACPI_HKEY_HID, 0}, 3842 {"", 0}, 3843}; 3844 3845static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 3846 .hid = ibm_htk_device_ids, 3847 .notify = hotkey_notify, 3848 .handle = &hkey_handle, 3849 .type = ACPI_DEVICE_NOTIFY, 3850}; 3851 3852static struct ibm_struct hotkey_driver_data = { 3853 .name = "hotkey", 3854 .read = hotkey_read, 3855 .write = hotkey_write, 3856 .exit = hotkey_exit, 3857 .resume = hotkey_resume, 3858 .suspend = hotkey_suspend, 3859 .acpi = &ibm_hotkey_acpidriver, 3860}; 3861 3862/************************************************************************* 3863 * Bluetooth subdriver 3864 */ 3865 3866enum { 3867 /* ACPI GBDC/SBDC bits */ 3868 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 3869 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 3870 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 3871 off / last state */ 3872}; 3873 3874enum { 3875 /* ACPI \BLTH commands */ 3876 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 3877 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 3878 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 3879 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 3880 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 3881}; 3882 3883#define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 3884 3885static int bluetooth_get_status(void) 3886{ 3887 int status; 3888 3889#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3890 if (dbg_bluetoothemul) 3891 return (tpacpi_bluetooth_emulstate) ? 3892 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3893#endif 3894 3895 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 3896 return -EIO; 3897 3898 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 3899 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3900} 3901 3902static int bluetooth_set_status(enum tpacpi_rfkill_state state) 3903{ 3904 int status; 3905 3906 vdbg_printk(TPACPI_DBG_RFKILL, 3907 "will attempt to %s bluetooth\n", 3908 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 3909 3910#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3911 if (dbg_bluetoothemul) { 3912 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 3913 return 0; 3914 } 3915#endif 3916 3917 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */ 3918 status = TP_ACPI_BLUETOOTH_RESUMECTRL; 3919 if (state == TPACPI_RFK_RADIO_ON) 3920 status |= TP_ACPI_BLUETOOTH_RADIOSSW; 3921 3922 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 3923 return -EIO; 3924 3925 return 0; 3926} 3927 3928/* sysfs bluetooth enable ---------------------------------------------- */ 3929static ssize_t bluetooth_enable_show(struct device *dev, 3930 struct device_attribute *attr, 3931 char *buf) 3932{ 3933 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 3934 attr, buf); 3935} 3936 3937static ssize_t bluetooth_enable_store(struct device *dev, 3938 struct device_attribute *attr, 3939 const char *buf, size_t count) 3940{ 3941 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 3942 attr, buf, count); 3943} 3944 3945static struct device_attribute dev_attr_bluetooth_enable = 3946 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO, 3947 bluetooth_enable_show, bluetooth_enable_store); 3948 3949/* --------------------------------------------------------------------- */ 3950 3951static struct attribute *bluetooth_attributes[] = { 3952 &dev_attr_bluetooth_enable.attr, 3953 NULL 3954}; 3955 3956static const struct attribute_group bluetooth_attr_group = { 3957 .attrs = bluetooth_attributes, 3958}; 3959 3960static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 3961 .get_status = bluetooth_get_status, 3962 .set_status = bluetooth_set_status, 3963}; 3964 3965static void bluetooth_shutdown(void) 3966{ 3967 /* Order firmware to save current state to NVRAM */ 3968 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 3969 TP_ACPI_BLTH_SAVE_STATE)) 3970 printk(TPACPI_NOTICE 3971 "failed to save bluetooth state to NVRAM\n"); 3972 else 3973 vdbg_printk(TPACPI_DBG_RFKILL, 3974 "bluestooth state saved to NVRAM\n"); 3975} 3976 3977static void bluetooth_exit(void) 3978{ 3979 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3980 &bluetooth_attr_group); 3981 3982 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 3983 3984 bluetooth_shutdown(); 3985} 3986 3987static int __init bluetooth_init(struct ibm_init_struct *iibm) 3988{ 3989 int res; 3990 int status = 0; 3991 3992 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 3993 "initializing bluetooth subdriver\n"); 3994 3995 TPACPI_ACPIHANDLE_INIT(hkey); 3996 3997 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 3998 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 3999 tp_features.bluetooth = hkey_handle && 4000 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4001 4002 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4003 "bluetooth is %s, status 0x%02x\n", 4004 str_supported(tp_features.bluetooth), 4005 status); 4006 4007#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4008 if (dbg_bluetoothemul) { 4009 tp_features.bluetooth = 1; 4010 printk(TPACPI_INFO 4011 "bluetooth switch emulation enabled\n"); 4012 } else 4013#endif 4014 if (tp_features.bluetooth && 4015 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4016 /* no bluetooth hardware present in system */ 4017 tp_features.bluetooth = 0; 4018 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4019 "bluetooth hardware not installed\n"); 4020 } 4021 4022 if (!tp_features.bluetooth) 4023 return 1; 4024 4025 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4026 &bluetooth_tprfk_ops, 4027 RFKILL_TYPE_BLUETOOTH, 4028 TPACPI_RFK_BLUETOOTH_SW_NAME, 4029 true); 4030 if (res) 4031 return res; 4032 4033 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4034 &bluetooth_attr_group); 4035 if (res) { 4036 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4037 return res; 4038 } 4039 4040 return 0; 4041} 4042 4043/* procfs -------------------------------------------------------------- */ 4044static int bluetooth_read(char *p) 4045{ 4046 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p); 4047} 4048 4049static int bluetooth_write(char *buf) 4050{ 4051 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4052} 4053 4054static struct ibm_struct bluetooth_driver_data = { 4055 .name = "bluetooth", 4056 .read = bluetooth_read, 4057 .write = bluetooth_write, 4058 .exit = bluetooth_exit, 4059 .shutdown = bluetooth_shutdown, 4060}; 4061 4062/************************************************************************* 4063 * Wan subdriver 4064 */ 4065 4066enum { 4067 /* ACPI GWAN/SWAN bits */ 4068 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4069 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4070 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4071 off / last state */ 4072}; 4073 4074#define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4075 4076static int wan_get_status(void) 4077{ 4078 int status; 4079 4080#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4081 if (dbg_wwanemul) 4082 return (tpacpi_wwan_emulstate) ? 4083 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4084#endif 4085 4086 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4087 return -EIO; 4088 4089 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4090 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4091} 4092 4093static int wan_set_status(enum tpacpi_rfkill_state state) 4094{ 4095 int status; 4096 4097 vdbg_printk(TPACPI_DBG_RFKILL, 4098 "will attempt to %s wwan\n", 4099 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4100 4101#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4102 if (dbg_wwanemul) { 4103 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4104 return 0; 4105 } 4106#endif 4107 4108 /* We make sure to set TP_ACPI_WANCARD_RESUMECTRL */ 4109 status = TP_ACPI_WANCARD_RESUMECTRL; 4110 if (state == TPACPI_RFK_RADIO_ON) 4111 status |= TP_ACPI_WANCARD_RADIOSSW; 4112 4113 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4114 return -EIO; 4115 4116 return 0; 4117} 4118 4119/* sysfs wan enable ---------------------------------------------------- */ 4120static ssize_t wan_enable_show(struct device *dev, 4121 struct device_attribute *attr, 4122 char *buf) 4123{ 4124 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4125 attr, buf); 4126} 4127 4128static ssize_t wan_enable_store(struct device *dev, 4129 struct device_attribute *attr, 4130 const char *buf, size_t count) 4131{ 4132 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4133 attr, buf, count); 4134} 4135 4136static struct device_attribute dev_attr_wan_enable = 4137 __ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4138 wan_enable_show, wan_enable_store); 4139 4140/* --------------------------------------------------------------------- */ 4141 4142static struct attribute *wan_attributes[] = { 4143 &dev_attr_wan_enable.attr, 4144 NULL 4145}; 4146 4147static const struct attribute_group wan_attr_group = { 4148 .attrs = wan_attributes, 4149}; 4150 4151static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4152 .get_status = wan_get_status, 4153 .set_status = wan_set_status, 4154}; 4155 4156static void wan_shutdown(void) 4157{ 4158 /* Order firmware to save current state to NVRAM */ 4159 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4160 TP_ACPI_WGSV_SAVE_STATE)) 4161 printk(TPACPI_NOTICE 4162 "failed to save WWAN state to NVRAM\n"); 4163 else 4164 vdbg_printk(TPACPI_DBG_RFKILL, 4165 "WWAN state saved to NVRAM\n"); 4166} 4167 4168static void wan_exit(void) 4169{ 4170 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4171 &wan_attr_group); 4172 4173 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4174 4175 wan_shutdown(); 4176} 4177 4178static int __init wan_init(struct ibm_init_struct *iibm) 4179{ 4180 int res; 4181 int status = 0; 4182 4183 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4184 "initializing wan subdriver\n"); 4185 4186 TPACPI_ACPIHANDLE_INIT(hkey); 4187 4188 tp_features.wan = hkey_handle && 4189 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4190 4191 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4192 "wan is %s, status 0x%02x\n", 4193 str_supported(tp_features.wan), 4194 status); 4195 4196#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4197 if (dbg_wwanemul) { 4198 tp_features.wan = 1; 4199 printk(TPACPI_INFO 4200 "wwan switch emulation enabled\n"); 4201 } else 4202#endif 4203 if (tp_features.wan && 4204 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4205 /* no wan hardware present in system */ 4206 tp_features.wan = 0; 4207 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4208 "wan hardware not installed\n"); 4209 } 4210 4211 if (!tp_features.wan) 4212 return 1; 4213 4214 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4215 &wan_tprfk_ops, 4216 RFKILL_TYPE_WWAN, 4217 TPACPI_RFK_WWAN_SW_NAME, 4218 true); 4219 if (res) 4220 return res; 4221 4222 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4223 &wan_attr_group); 4224 4225 if (res) { 4226 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4227 return res; 4228 } 4229 4230 return 0; 4231} 4232 4233/* procfs -------------------------------------------------------------- */ 4234static int wan_read(char *p) 4235{ 4236 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p); 4237} 4238 4239static int wan_write(char *buf) 4240{ 4241 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4242} 4243 4244static struct ibm_struct wan_driver_data = { 4245 .name = "wan", 4246 .read = wan_read, 4247 .write = wan_write, 4248 .exit = wan_exit, 4249 .shutdown = wan_shutdown, 4250}; 4251 4252/************************************************************************* 4253 * UWB subdriver 4254 */ 4255 4256enum { 4257 /* ACPI GUWB/SUWB bits */ 4258 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4259 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4260}; 4261 4262#define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4263 4264static int uwb_get_status(void) 4265{ 4266 int status; 4267 4268#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4269 if (dbg_uwbemul) 4270 return (tpacpi_uwb_emulstate) ? 4271 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4272#endif 4273 4274 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4275 return -EIO; 4276 4277 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4278 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4279} 4280 4281static int uwb_set_status(enum tpacpi_rfkill_state state) 4282{ 4283 int status; 4284 4285 vdbg_printk(TPACPI_DBG_RFKILL, 4286 "will attempt to %s UWB\n", 4287 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4288 4289#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4290 if (dbg_uwbemul) { 4291 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4292 return 0; 4293 } 4294#endif 4295 4296 if (state == TPACPI_RFK_RADIO_ON) 4297 status = TP_ACPI_UWB_RADIOSSW; 4298 else 4299 status = 0; 4300 4301 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4302 return -EIO; 4303 4304 return 0; 4305} 4306 4307/* --------------------------------------------------------------------- */ 4308 4309static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4310 .get_status = uwb_get_status, 4311 .set_status = uwb_set_status, 4312}; 4313 4314static void uwb_exit(void) 4315{ 4316 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4317} 4318 4319static int __init uwb_init(struct ibm_init_struct *iibm) 4320{ 4321 int res; 4322 int status = 0; 4323 4324 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4325 "initializing uwb subdriver\n"); 4326 4327 TPACPI_ACPIHANDLE_INIT(hkey); 4328 4329 tp_features.uwb = hkey_handle && 4330 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4331 4332 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4333 "uwb is %s, status 0x%02x\n", 4334 str_supported(tp_features.uwb), 4335 status); 4336 4337#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4338 if (dbg_uwbemul) { 4339 tp_features.uwb = 1; 4340 printk(TPACPI_INFO 4341 "uwb switch emulation enabled\n"); 4342 } else 4343#endif 4344 if (tp_features.uwb && 4345 !(status & TP_ACPI_UWB_HWPRESENT)) { 4346 /* no uwb hardware present in system */ 4347 tp_features.uwb = 0; 4348 dbg_printk(TPACPI_DBG_INIT, 4349 "uwb hardware not installed\n"); 4350 } 4351 4352 if (!tp_features.uwb) 4353 return 1; 4354 4355 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4356 &uwb_tprfk_ops, 4357 RFKILL_TYPE_UWB, 4358 TPACPI_RFK_UWB_SW_NAME, 4359 false); 4360 return res; 4361} 4362 4363static struct ibm_struct uwb_driver_data = { 4364 .name = "uwb", 4365 .exit = uwb_exit, 4366 .flags.experimental = 1, 4367}; 4368 4369/************************************************************************* 4370 * Video subdriver 4371 */ 4372 4373#ifdef CONFIG_THINKPAD_ACPI_VIDEO 4374 4375enum video_access_mode { 4376 TPACPI_VIDEO_NONE = 0, 4377 TPACPI_VIDEO_570, /* 570 */ 4378 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4379 TPACPI_VIDEO_NEW, /* all others */ 4380}; 4381 4382enum { /* video status flags, based on VIDEO_570 */ 4383 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4384 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4385 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4386}; 4387 4388enum { /* TPACPI_VIDEO_570 constants */ 4389 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4390 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4391 * video_status_flags */ 4392 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4393 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4394}; 4395 4396static enum video_access_mode video_supported; 4397static int video_orig_autosw; 4398 4399static int video_autosw_get(void); 4400static int video_autosw_set(int enable); 4401 4402TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4403 4404static int __init video_init(struct ibm_init_struct *iibm) 4405{ 4406 int ivga; 4407 4408 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4409 4410 TPACPI_ACPIHANDLE_INIT(vid); 4411 TPACPI_ACPIHANDLE_INIT(vid2); 4412 4413 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4414 /* G41, assume IVGA doesn't change */ 4415 vid_handle = vid2_handle; 4416 4417 if (!vid_handle) 4418 /* video switching not supported on R30, R31 */ 4419 video_supported = TPACPI_VIDEO_NONE; 4420 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4421 /* 570 */ 4422 video_supported = TPACPI_VIDEO_570; 4423 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4424 /* 600e/x, 770e, 770x */ 4425 video_supported = TPACPI_VIDEO_770; 4426 else 4427 /* all others */ 4428 video_supported = TPACPI_VIDEO_NEW; 4429 4430 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4431 str_supported(video_supported != TPACPI_VIDEO_NONE), 4432 video_supported); 4433 4434 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1; 4435} 4436 4437static void video_exit(void) 4438{ 4439 dbg_printk(TPACPI_DBG_EXIT, 4440 "restoring original video autoswitch mode\n"); 4441 if (video_autosw_set(video_orig_autosw)) 4442 printk(TPACPI_ERR "error while trying to restore original " 4443 "video autoswitch mode\n"); 4444} 4445 4446static int video_outputsw_get(void) 4447{ 4448 int status = 0; 4449 int i; 4450 4451 switch (video_supported) { 4452 case TPACPI_VIDEO_570: 4453 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4454 TP_ACPI_VIDEO_570_PHSCMD)) 4455 return -EIO; 4456 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4457 break; 4458 case TPACPI_VIDEO_770: 4459 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4460 return -EIO; 4461 if (i) 4462 status |= TP_ACPI_VIDEO_S_LCD; 4463 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4464 return -EIO; 4465 if (i) 4466 status |= TP_ACPI_VIDEO_S_CRT; 4467 break; 4468 case TPACPI_VIDEO_NEW: 4469 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4470 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4471 return -EIO; 4472 if (i) 4473 status |= TP_ACPI_VIDEO_S_CRT; 4474 4475 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4476 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4477 return -EIO; 4478 if (i) 4479 status |= TP_ACPI_VIDEO_S_LCD; 4480 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4481 return -EIO; 4482 if (i) 4483 status |= TP_ACPI_VIDEO_S_DVI; 4484 break; 4485 default: 4486 return -ENOSYS; 4487 } 4488 4489 return status; 4490} 4491 4492static int video_outputsw_set(int status) 4493{ 4494 int autosw; 4495 int res = 0; 4496 4497 switch (video_supported) { 4498 case TPACPI_VIDEO_570: 4499 res = acpi_evalf(NULL, NULL, 4500 "\\_SB.PHS2", "vdd", 4501 TP_ACPI_VIDEO_570_PHS2CMD, 4502 status | TP_ACPI_VIDEO_570_PHS2SET); 4503 break; 4504 case TPACPI_VIDEO_770: 4505 autosw = video_autosw_get(); 4506 if (autosw < 0) 4507 return autosw; 4508 4509 res = video_autosw_set(1); 4510 if (res) 4511 return res; 4512 res = acpi_evalf(vid_handle, NULL, 4513 "ASWT", "vdd", status * 0x100, 0); 4514 if (!autosw && video_autosw_set(autosw)) { 4515 printk(TPACPI_ERR 4516 "video auto-switch left enabled due to error\n"); 4517 return -EIO; 4518 } 4519 break; 4520 case TPACPI_VIDEO_NEW: 4521 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4522 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4523 break; 4524 default: 4525 return -ENOSYS; 4526 } 4527 4528 return (res)? 0 : -EIO; 4529} 4530 4531static int video_autosw_get(void) 4532{ 4533 int autosw = 0; 4534 4535 switch (video_supported) { 4536 case TPACPI_VIDEO_570: 4537 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4538 return -EIO; 4539 break; 4540 case TPACPI_VIDEO_770: 4541 case TPACPI_VIDEO_NEW: 4542 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4543 return -EIO; 4544 break; 4545 default: 4546 return -ENOSYS; 4547 } 4548 4549 return autosw & 1; 4550} 4551 4552static int video_autosw_set(int enable) 4553{ 4554 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0)) 4555 return -EIO; 4556 return 0; 4557} 4558 4559static int video_outputsw_cycle(void) 4560{ 4561 int autosw = video_autosw_get(); 4562 int res; 4563 4564 if (autosw < 0) 4565 return autosw; 4566 4567 switch (video_supported) { 4568 case TPACPI_VIDEO_570: 4569 res = video_autosw_set(1); 4570 if (res) 4571 return res; 4572 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4573 break; 4574 case TPACPI_VIDEO_770: 4575 case TPACPI_VIDEO_NEW: 4576 res = video_autosw_set(1); 4577 if (res) 4578 return res; 4579 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4580 break; 4581 default: 4582 return -ENOSYS; 4583 } 4584 if (!autosw && video_autosw_set(autosw)) { 4585 printk(TPACPI_ERR 4586 "video auto-switch left enabled due to error\n"); 4587 return -EIO; 4588 } 4589 4590 return (res)? 0 : -EIO; 4591} 4592 4593static int video_expand_toggle(void) 4594{ 4595 switch (video_supported) { 4596 case TPACPI_VIDEO_570: 4597 return acpi_evalf(ec_handle, NULL, "_Q17", "v")? 4598 0 : -EIO; 4599 case TPACPI_VIDEO_770: 4600 return acpi_evalf(vid_handle, NULL, "VEXP", "v")? 4601 0 : -EIO; 4602 case TPACPI_VIDEO_NEW: 4603 return acpi_evalf(NULL, NULL, "\\VEXP", "v")? 4604 0 : -EIO; 4605 default: 4606 return -ENOSYS; 4607 } 4608 /* not reached */ 4609} 4610 4611static int video_read(char *p) 4612{ 4613 int status, autosw; 4614 int len = 0; 4615 4616 if (video_supported == TPACPI_VIDEO_NONE) { 4617 len += sprintf(p + len, "status:\t\tnot supported\n"); 4618 return len; 4619 } 4620 4621 status = video_outputsw_get(); 4622 if (status < 0) 4623 return status; 4624 4625 autosw = video_autosw_get(); 4626 if (autosw < 0) 4627 return autosw; 4628 4629 len += sprintf(p + len, "status:\t\tsupported\n"); 4630 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0)); 4631 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1)); 4632 if (video_supported == TPACPI_VIDEO_NEW) 4633 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3)); 4634 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0)); 4635 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n"); 4636 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n"); 4637 if (video_supported == TPACPI_VIDEO_NEW) 4638 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n"); 4639 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n"); 4640 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n"); 4641 4642 return len; 4643} 4644 4645static int video_write(char *buf) 4646{ 4647 char *cmd; 4648 int enable, disable, status; 4649 int res; 4650 4651 if (video_supported == TPACPI_VIDEO_NONE) 4652 return -ENODEV; 4653 4654 enable = 0; 4655 disable = 0; 4656 4657 while ((cmd = next_cmd(&buf))) { 4658 if (strlencmp(cmd, "lcd_enable") == 0) { 4659 enable |= TP_ACPI_VIDEO_S_LCD; 4660 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4661 disable |= TP_ACPI_VIDEO_S_LCD; 4662 } else if (strlencmp(cmd, "crt_enable") == 0) { 4663 enable |= TP_ACPI_VIDEO_S_CRT; 4664 } else if (strlencmp(cmd, "crt_disable") == 0) { 4665 disable |= TP_ACPI_VIDEO_S_CRT; 4666 } else if (video_supported == TPACPI_VIDEO_NEW && 4667 strlencmp(cmd, "dvi_enable") == 0) { 4668 enable |= TP_ACPI_VIDEO_S_DVI; 4669 } else if (video_supported == TPACPI_VIDEO_NEW && 4670 strlencmp(cmd, "dvi_disable") == 0) { 4671 disable |= TP_ACPI_VIDEO_S_DVI; 4672 } else if (strlencmp(cmd, "auto_enable") == 0) { 4673 res = video_autosw_set(1); 4674 if (res) 4675 return res; 4676 } else if (strlencmp(cmd, "auto_disable") == 0) { 4677 res = video_autosw_set(0); 4678 if (res) 4679 return res; 4680 } else if (strlencmp(cmd, "video_switch") == 0) { 4681 res = video_outputsw_cycle(); 4682 if (res) 4683 return res; 4684 } else if (strlencmp(cmd, "expand_toggle") == 0) { 4685 res = video_expand_toggle(); 4686 if (res) 4687 return res; 4688 } else 4689 return -EINVAL; 4690 } 4691 4692 if (enable || disable) { 4693 status = video_outputsw_get(); 4694 if (status < 0) 4695 return status; 4696 res = video_outputsw_set((status & ~disable) | enable); 4697 if (res) 4698 return res; 4699 } 4700 4701 return 0; 4702} 4703 4704static struct ibm_struct video_driver_data = { 4705 .name = "video", 4706 .read = video_read, 4707 .write = video_write, 4708 .exit = video_exit, 4709}; 4710 4711#endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 4712 4713/************************************************************************* 4714 * Light (thinklight) subdriver 4715 */ 4716 4717TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 4718TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 4719 4720static int light_get_status(void) 4721{ 4722 int status = 0; 4723 4724 if (tp_features.light_status) { 4725 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 4726 return -EIO; 4727 return (!!status); 4728 } 4729 4730 return -ENXIO; 4731} 4732 4733static int light_set_status(int status) 4734{ 4735 int rc; 4736 4737 if (tp_features.light) { 4738 if (cmos_handle) { 4739 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 4740 (status)? 4741 TP_CMOS_THINKLIGHT_ON : 4742 TP_CMOS_THINKLIGHT_OFF); 4743 } else { 4744 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 4745 (status)? 1 : 0); 4746 } 4747 return (rc)? 0 : -EIO; 4748 } 4749 4750 return -ENXIO; 4751} 4752 4753static void light_set_status_worker(struct work_struct *work) 4754{ 4755 struct tpacpi_led_classdev *data = 4756 container_of(work, struct tpacpi_led_classdev, work); 4757 4758 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 4759 light_set_status((data->new_state != TPACPI_LED_OFF)); 4760} 4761 4762static void light_sysfs_set(struct led_classdev *led_cdev, 4763 enum led_brightness brightness) 4764{ 4765 struct tpacpi_led_classdev *data = 4766 container_of(led_cdev, 4767 struct tpacpi_led_classdev, 4768 led_classdev); 4769 data->new_state = (brightness != LED_OFF) ? 4770 TPACPI_LED_ON : TPACPI_LED_OFF; 4771 queue_work(tpacpi_wq, &data->work); 4772} 4773 4774static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 4775{ 4776 return (light_get_status() == 1)? LED_FULL : LED_OFF; 4777} 4778 4779static struct tpacpi_led_classdev tpacpi_led_thinklight = { 4780 .led_classdev = { 4781 .name = "tpacpi::thinklight", 4782 .brightness_set = &light_sysfs_set, 4783 .brightness_get = &light_sysfs_get, 4784 } 4785}; 4786 4787static int __init light_init(struct ibm_init_struct *iibm) 4788{ 4789 int rc; 4790 4791 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 4792 4793 TPACPI_ACPIHANDLE_INIT(ledb); 4794 TPACPI_ACPIHANDLE_INIT(lght); 4795 TPACPI_ACPIHANDLE_INIT(cmos); 4796 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 4797 4798 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 4799 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 4800 4801 if (tp_features.light) 4802 /* light status not supported on 4803 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 4804 tp_features.light_status = 4805 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 4806 4807 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 4808 str_supported(tp_features.light), 4809 str_supported(tp_features.light_status)); 4810 4811 if (!tp_features.light) 4812 return 1; 4813 4814 rc = led_classdev_register(&tpacpi_pdev->dev, 4815 &tpacpi_led_thinklight.led_classdev); 4816 4817 if (rc < 0) { 4818 tp_features.light = 0; 4819 tp_features.light_status = 0; 4820 } else { 4821 rc = 0; 4822 } 4823 4824 return rc; 4825} 4826 4827static void light_exit(void) 4828{ 4829 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 4830 if (work_pending(&tpacpi_led_thinklight.work)) 4831 flush_workqueue(tpacpi_wq); 4832} 4833 4834static int light_read(char *p) 4835{ 4836 int len = 0; 4837 int status; 4838 4839 if (!tp_features.light) { 4840 len += sprintf(p + len, "status:\t\tnot supported\n"); 4841 } else if (!tp_features.light_status) { 4842 len += sprintf(p + len, "status:\t\tunknown\n"); 4843 len += sprintf(p + len, "commands:\ton, off\n"); 4844 } else { 4845 status = light_get_status(); 4846 if (status < 0) 4847 return status; 4848 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0)); 4849 len += sprintf(p + len, "commands:\ton, off\n"); 4850 } 4851 4852 return len; 4853} 4854 4855static int light_write(char *buf) 4856{ 4857 char *cmd; 4858 int newstatus = 0; 4859 4860 if (!tp_features.light) 4861 return -ENODEV; 4862 4863 while ((cmd = next_cmd(&buf))) { 4864 if (strlencmp(cmd, "on") == 0) { 4865 newstatus = 1; 4866 } else if (strlencmp(cmd, "off") == 0) { 4867 newstatus = 0; 4868 } else 4869 return -EINVAL; 4870 } 4871 4872 return light_set_status(newstatus); 4873} 4874 4875static struct ibm_struct light_driver_data = { 4876 .name = "light", 4877 .read = light_read, 4878 .write = light_write, 4879 .exit = light_exit, 4880}; 4881 4882/************************************************************************* 4883 * CMOS subdriver 4884 */ 4885 4886/* sysfs cmos_command -------------------------------------------------- */ 4887static ssize_t cmos_command_store(struct device *dev, 4888 struct device_attribute *attr, 4889 const char *buf, size_t count) 4890{ 4891 unsigned long cmos_cmd; 4892 int res; 4893 4894 if (parse_strtoul(buf, 21, &cmos_cmd)) 4895 return -EINVAL; 4896 4897 res = issue_thinkpad_cmos_command(cmos_cmd); 4898 return (res)? res : count; 4899} 4900 4901static struct device_attribute dev_attr_cmos_command = 4902 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store); 4903 4904/* --------------------------------------------------------------------- */ 4905 4906static int __init cmos_init(struct ibm_init_struct *iibm) 4907{ 4908 int res; 4909 4910 vdbg_printk(TPACPI_DBG_INIT, 4911 "initializing cmos commands subdriver\n"); 4912 4913 TPACPI_ACPIHANDLE_INIT(cmos); 4914 4915 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 4916 str_supported(cmos_handle != NULL)); 4917 4918 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4919 if (res) 4920 return res; 4921 4922 return (cmos_handle)? 0 : 1; 4923} 4924 4925static void cmos_exit(void) 4926{ 4927 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4928} 4929 4930static int cmos_read(char *p) 4931{ 4932 int len = 0; 4933 4934 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4935 R30, R31, T20-22, X20-21 */ 4936 if (!cmos_handle) 4937 len += sprintf(p + len, "status:\t\tnot supported\n"); 4938 else { 4939 len += sprintf(p + len, "status:\t\tsupported\n"); 4940 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n"); 4941 } 4942 4943 return len; 4944} 4945 4946static int cmos_write(char *buf) 4947{ 4948 char *cmd; 4949 int cmos_cmd, res; 4950 4951 while ((cmd = next_cmd(&buf))) { 4952 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 4953 cmos_cmd >= 0 && cmos_cmd <= 21) { 4954 /* cmos_cmd set */ 4955 } else 4956 return -EINVAL; 4957 4958 res = issue_thinkpad_cmos_command(cmos_cmd); 4959 if (res) 4960 return res; 4961 } 4962 4963 return 0; 4964} 4965 4966static struct ibm_struct cmos_driver_data = { 4967 .name = "cmos", 4968 .read = cmos_read, 4969 .write = cmos_write, 4970 .exit = cmos_exit, 4971}; 4972 4973/************************************************************************* 4974 * LED subdriver 4975 */ 4976 4977enum led_access_mode { 4978 TPACPI_LED_NONE = 0, 4979 TPACPI_LED_570, /* 570 */ 4980 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 4981 TPACPI_LED_NEW, /* all others */ 4982}; 4983 4984enum { /* For TPACPI_LED_OLD */ 4985 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 4986 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 4987 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 4988}; 4989 4990static enum led_access_mode led_supported; 4991 4992TPACPI_HANDLE(led, ec, "SLED", /* 570 */ 4993 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */ 4994 /* T20-22, X20-21 */ 4995 "LED", /* all others */ 4996 ); /* R30, R31 */ 4997 4998#define TPACPI_LED_NUMLEDS 16 4999static struct tpacpi_led_classdev *tpacpi_leds; 5000static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5001static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5002 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5003 "tpacpi::power", 5004 "tpacpi:orange:batt", 5005 "tpacpi:green:batt", 5006 "tpacpi::dock_active", 5007 "tpacpi::bay_active", 5008 "tpacpi::dock_batt", 5009 "tpacpi::unknown_led", 5010 "tpacpi::standby", 5011 "tpacpi::dock_status1", 5012 "tpacpi::dock_status2", 5013 "tpacpi::unknown_led2", 5014 "tpacpi::unknown_led3", 5015 "tpacpi::thinkvantage", 5016}; 5017#define TPACPI_SAFE_LEDS 0x1081U 5018 5019static inline bool tpacpi_is_led_restricted(const unsigned int led) 5020{ 5021#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5022 return false; 5023#else 5024 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5025#endif 5026} 5027 5028static int led_get_status(const unsigned int led) 5029{ 5030 int status; 5031 enum led_status_t led_s; 5032 5033 switch (led_supported) { 5034 case TPACPI_LED_570: 5035 if (!acpi_evalf(ec_handle, 5036 &status, "GLED", "dd", 1 << led)) 5037 return -EIO; 5038 led_s = (status == 0)? 5039 TPACPI_LED_OFF : 5040 ((status == 1)? 5041 TPACPI_LED_ON : 5042 TPACPI_LED_BLINK); 5043 tpacpi_led_state_cache[led] = led_s; 5044 return led_s; 5045 default: 5046 return -ENXIO; 5047 } 5048 5049 /* not reached */ 5050} 5051 5052static int led_set_status(const unsigned int led, 5053 const enum led_status_t ledstatus) 5054{ 5055 /* off, on, blink. Index is led_status_t */ 5056 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5057 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5058 5059 int rc = 0; 5060 5061 switch (led_supported) { 5062 case TPACPI_LED_570: 5063 /* 570 */ 5064 if (unlikely(led > 7)) 5065 return -EINVAL; 5066 if (unlikely(tpacpi_is_led_restricted(led))) 5067 return -EPERM; 5068 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5069 (1 << led), led_sled_arg1[ledstatus])) 5070 rc = -EIO; 5071 break; 5072 case TPACPI_LED_OLD: 5073 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5074 if (unlikely(led > 7)) 5075 return -EINVAL; 5076 if (unlikely(tpacpi_is_led_restricted(led))) 5077 return -EPERM; 5078 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5079 if (rc >= 0) 5080 rc = ec_write(TPACPI_LED_EC_HLBL, 5081 (ledstatus == TPACPI_LED_BLINK) << led); 5082 if (rc >= 0) 5083 rc = ec_write(TPACPI_LED_EC_HLCL, 5084 (ledstatus != TPACPI_LED_OFF) << led); 5085 break; 5086 case TPACPI_LED_NEW: 5087 /* all others */ 5088 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5089 return -EINVAL; 5090 if (unlikely(tpacpi_is_led_restricted(led))) 5091 return -EPERM; 5092 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5093 led, led_led_arg1[ledstatus])) 5094 rc = -EIO; 5095 break; 5096 default: 5097 rc = -ENXIO; 5098 } 5099 5100 if (!rc) 5101 tpacpi_led_state_cache[led] = ledstatus; 5102 5103 return rc; 5104} 5105 5106static void led_set_status_worker(struct work_struct *work) 5107{ 5108 struct tpacpi_led_classdev *data = 5109 container_of(work, struct tpacpi_led_classdev, work); 5110 5111 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5112 led_set_status(data->led, data->new_state); 5113} 5114 5115static void led_sysfs_set(struct led_classdev *led_cdev, 5116 enum led_brightness brightness) 5117{ 5118 struct tpacpi_led_classdev *data = container_of(led_cdev, 5119 struct tpacpi_led_classdev, led_classdev); 5120 5121 if (brightness == LED_OFF) 5122 data->new_state = TPACPI_LED_OFF; 5123 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5124 data->new_state = TPACPI_LED_ON; 5125 else 5126 data->new_state = TPACPI_LED_BLINK; 5127 5128 queue_work(tpacpi_wq, &data->work); 5129} 5130 5131static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5132 unsigned long *delay_on, unsigned long *delay_off) 5133{ 5134 struct tpacpi_led_classdev *data = container_of(led_cdev, 5135 struct tpacpi_led_classdev, led_classdev); 5136 5137 /* Can we choose the flash rate? */ 5138 if (*delay_on == 0 && *delay_off == 0) { 5139 /* yes. set them to the hardware blink rate (1 Hz) */ 5140 *delay_on = 500; /* ms */ 5141 *delay_off = 500; /* ms */ 5142 } else if ((*delay_on != 500) || (*delay_off != 500)) 5143 return -EINVAL; 5144 5145 data->new_state = TPACPI_LED_BLINK; 5146 queue_work(tpacpi_wq, &data->work); 5147 5148 return 0; 5149} 5150 5151static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5152{ 5153 int rc; 5154 5155 struct tpacpi_led_classdev *data = container_of(led_cdev, 5156 struct tpacpi_led_classdev, led_classdev); 5157 5158 rc = led_get_status(data->led); 5159 5160 if (rc == TPACPI_LED_OFF || rc < 0) 5161 rc = LED_OFF; /* no error handling in led class :( */ 5162 else 5163 rc = LED_FULL; 5164 5165 return rc; 5166} 5167 5168static void led_exit(void) 5169{ 5170 unsigned int i; 5171 5172 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5173 if (tpacpi_leds[i].led_classdev.name) 5174 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5175 } 5176 5177 kfree(tpacpi_leds); 5178} 5179 5180static int __init tpacpi_init_led(unsigned int led) 5181{ 5182 int rc; 5183 5184 tpacpi_leds[led].led = led; 5185 5186 /* LEDs with no name don't get registered */ 5187 if (!tpacpi_led_names[led]) 5188 return 0; 5189 5190 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5191 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5192 if (led_supported == TPACPI_LED_570) 5193 tpacpi_leds[led].led_classdev.brightness_get = 5194 &led_sysfs_get; 5195 5196 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5197 5198 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5199 5200 rc = led_classdev_register(&tpacpi_pdev->dev, 5201 &tpacpi_leds[led].led_classdev); 5202 if (rc < 0) 5203 tpacpi_leds[led].led_classdev.name = NULL; 5204 5205 return rc; 5206} 5207 5208static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5209 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5210 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5211 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5212 5213 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5214 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5215 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5216 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5217 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5218 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5219 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5220 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5221 5222 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5223 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5224 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5225 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5226 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5227 5228 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5229 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5230 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5231 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5232 5233 /* (1) - may have excess leds enabled on MSB */ 5234 5235 /* Defaults (order matters, keep last, don't reorder!) */ 5236 { /* Lenovo */ 5237 .vendor = PCI_VENDOR_ID_LENOVO, 5238 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5239 .quirks = 0x1fffU, 5240 }, 5241 { /* IBM ThinkPads with no EC version string */ 5242 .vendor = PCI_VENDOR_ID_IBM, 5243 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5244 .quirks = 0x00ffU, 5245 }, 5246 { /* IBM ThinkPads with EC version string */ 5247 .vendor = PCI_VENDOR_ID_IBM, 5248 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5249 .quirks = 0x00bfU, 5250 }, 5251}; 5252 5253#undef TPACPI_LEDQ_IBM 5254#undef TPACPI_LEDQ_LNV 5255 5256static int __init led_init(struct ibm_init_struct *iibm) 5257{ 5258 unsigned int i; 5259 int rc; 5260 unsigned long useful_leds; 5261 5262 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5263 5264 TPACPI_ACPIHANDLE_INIT(led); 5265 5266 if (!led_handle) 5267 /* led not supported on R30, R31 */ 5268 led_supported = TPACPI_LED_NONE; 5269 else if (strlencmp(led_path, "SLED") == 0) 5270 /* 570 */ 5271 led_supported = TPACPI_LED_570; 5272 else if (strlencmp(led_path, "SYSL") == 0) 5273 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5274 led_supported = TPACPI_LED_OLD; 5275 else 5276 /* all others */ 5277 led_supported = TPACPI_LED_NEW; 5278 5279 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5280 str_supported(led_supported), led_supported); 5281 5282 if (led_supported == TPACPI_LED_NONE) 5283 return 1; 5284 5285 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5286 GFP_KERNEL); 5287 if (!tpacpi_leds) { 5288 printk(TPACPI_ERR "Out of memory for LED data\n"); 5289 return -ENOMEM; 5290 } 5291 5292 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5293 ARRAY_SIZE(led_useful_qtable)); 5294 5295 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5296 if (!tpacpi_is_led_restricted(i) && 5297 test_bit(i, &useful_leds)) { 5298 rc = tpacpi_init_led(i); 5299 if (rc < 0) { 5300 led_exit(); 5301 return rc; 5302 } 5303 } 5304 } 5305 5306#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5307 printk(TPACPI_NOTICE 5308 "warning: userspace override of important " 5309 "firmware LEDs is enabled\n"); 5310#endif 5311 return 0; 5312} 5313 5314#define str_led_status(s) \ 5315 ((s) == TPACPI_LED_OFF ? "off" : \ 5316 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5317 5318static int led_read(char *p) 5319{ 5320 int len = 0; 5321 5322 if (!led_supported) { 5323 len += sprintf(p + len, "status:\t\tnot supported\n"); 5324 return len; 5325 } 5326 len += sprintf(p + len, "status:\t\tsupported\n"); 5327 5328 if (led_supported == TPACPI_LED_570) { 5329 /* 570 */ 5330 int i, status; 5331 for (i = 0; i < 8; i++) { 5332 status = led_get_status(i); 5333 if (status < 0) 5334 return -EIO; 5335 len += sprintf(p + len, "%d:\t\t%s\n", 5336 i, str_led_status(status)); 5337 } 5338 } 5339 5340 len += sprintf(p + len, "commands:\t" 5341 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5342 5343 return len; 5344} 5345 5346static int led_write(char *buf) 5347{ 5348 char *cmd; 5349 int led, rc; 5350 enum led_status_t s; 5351 5352 if (!led_supported) 5353 return -ENODEV; 5354 5355 while ((cmd = next_cmd(&buf))) { 5356 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15) 5357 return -EINVAL; 5358 5359 if (strstr(cmd, "off")) { 5360 s = TPACPI_LED_OFF; 5361 } else if (strstr(cmd, "on")) { 5362 s = TPACPI_LED_ON; 5363 } else if (strstr(cmd, "blink")) { 5364 s = TPACPI_LED_BLINK; 5365 } else { 5366 return -EINVAL; 5367 } 5368 5369 rc = led_set_status(led, s); 5370 if (rc < 0) 5371 return rc; 5372 } 5373 5374 return 0; 5375} 5376 5377static struct ibm_struct led_driver_data = { 5378 .name = "led", 5379 .read = led_read, 5380 .write = led_write, 5381 .exit = led_exit, 5382}; 5383 5384/************************************************************************* 5385 * Beep subdriver 5386 */ 5387 5388TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5389 5390#define TPACPI_BEEP_Q1 0x0001 5391 5392static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5393 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5394 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5395}; 5396 5397static int __init beep_init(struct ibm_init_struct *iibm) 5398{ 5399 unsigned long quirks; 5400 5401 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5402 5403 TPACPI_ACPIHANDLE_INIT(beep); 5404 5405 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5406 str_supported(beep_handle != NULL)); 5407 5408 quirks = tpacpi_check_quirks(beep_quirk_table, 5409 ARRAY_SIZE(beep_quirk_table)); 5410 5411 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5412 5413 return (beep_handle)? 0 : 1; 5414} 5415 5416static int beep_read(char *p) 5417{ 5418 int len = 0; 5419 5420 if (!beep_handle) 5421 len += sprintf(p + len, "status:\t\tnot supported\n"); 5422 else { 5423 len += sprintf(p + len, "status:\t\tsupported\n"); 5424 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5425 } 5426 5427 return len; 5428} 5429 5430static int beep_write(char *buf) 5431{ 5432 char *cmd; 5433 int beep_cmd; 5434 5435 if (!beep_handle) 5436 return -ENODEV; 5437 5438 while ((cmd = next_cmd(&buf))) { 5439 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 5440 beep_cmd >= 0 && beep_cmd <= 17) { 5441 /* beep_cmd set */ 5442 } else 5443 return -EINVAL; 5444 if (tp_features.beep_needs_two_args) { 5445 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 5446 beep_cmd, 0)) 5447 return -EIO; 5448 } else { 5449 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 5450 beep_cmd)) 5451 return -EIO; 5452 } 5453 } 5454 5455 return 0; 5456} 5457 5458static struct ibm_struct beep_driver_data = { 5459 .name = "beep", 5460 .read = beep_read, 5461 .write = beep_write, 5462}; 5463 5464/************************************************************************* 5465 * Thermal subdriver 5466 */ 5467 5468enum thermal_access_mode { 5469 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 5470 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 5471 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 5472 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 5473 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 5474}; 5475 5476enum { /* TPACPI_THERMAL_TPEC_* */ 5477 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 5478 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 5479 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 5480 5481 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 5482}; 5483 5484 5485#define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 5486struct ibm_thermal_sensors_struct { 5487 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 5488}; 5489 5490static enum thermal_access_mode thermal_read_mode; 5491 5492/* idx is zero-based */ 5493static int thermal_get_sensor(int idx, s32 *value) 5494{ 5495 int t; 5496 s8 tmp; 5497 char tmpi[5]; 5498 5499 t = TP_EC_THERMAL_TMP0; 5500 5501 switch (thermal_read_mode) { 5502#if TPACPI_MAX_THERMAL_SENSORS >= 16 5503 case TPACPI_THERMAL_TPEC_16: 5504 if (idx >= 8 && idx <= 15) { 5505 t = TP_EC_THERMAL_TMP8; 5506 idx -= 8; 5507 } 5508 /* fallthrough */ 5509#endif 5510 case TPACPI_THERMAL_TPEC_8: 5511 if (idx <= 7) { 5512 if (!acpi_ec_read(t + idx, &tmp)) 5513 return -EIO; 5514 *value = tmp * 1000; 5515 return 0; 5516 } 5517 break; 5518 5519 case TPACPI_THERMAL_ACPI_UPDT: 5520 if (idx <= 7) { 5521 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5522 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 5523 return -EIO; 5524 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5525 return -EIO; 5526 *value = (t - 2732) * 100; 5527 return 0; 5528 } 5529 break; 5530 5531 case TPACPI_THERMAL_ACPI_TMP07: 5532 if (idx <= 7) { 5533 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5534 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5535 return -EIO; 5536 if (t > 127 || t < -127) 5537 t = TP_EC_THERMAL_TMP_NA; 5538 *value = t * 1000; 5539 return 0; 5540 } 5541 break; 5542 5543 case TPACPI_THERMAL_NONE: 5544 default: 5545 return -ENOSYS; 5546 } 5547 5548 return -EINVAL; 5549} 5550 5551static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 5552{ 5553 int res, i; 5554 int n; 5555 5556 n = 8; 5557 i = 0; 5558 5559 if (!s) 5560 return -EINVAL; 5561 5562 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 5563 n = 16; 5564 5565 for (i = 0 ; i < n; i++) { 5566 res = thermal_get_sensor(i, &s->temp[i]); 5567 if (res) 5568 return res; 5569 } 5570 5571 return n; 5572} 5573 5574static void thermal_dump_all_sensors(void) 5575{ 5576 int n, i; 5577 struct ibm_thermal_sensors_struct t; 5578 5579 n = thermal_get_sensors(&t); 5580 if (n <= 0) 5581 return; 5582 5583 printk(TPACPI_NOTICE 5584 "temperatures (Celsius):"); 5585 5586 for (i = 0; i < n; i++) { 5587 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 5588 printk(KERN_CONT " %d", (int)(t.temp[i] / 1000)); 5589 else 5590 printk(KERN_CONT " N/A"); 5591 } 5592 5593 printk(KERN_CONT "\n"); 5594} 5595 5596/* sysfs temp##_input -------------------------------------------------- */ 5597 5598static ssize_t thermal_temp_input_show(struct device *dev, 5599 struct device_attribute *attr, 5600 char *buf) 5601{ 5602 struct sensor_device_attribute *sensor_attr = 5603 to_sensor_dev_attr(attr); 5604 int idx = sensor_attr->index; 5605 s32 value; 5606 int res; 5607 5608 res = thermal_get_sensor(idx, &value); 5609 if (res) 5610 return res; 5611 if (value == TPACPI_THERMAL_SENSOR_NA) 5612 return -ENXIO; 5613 5614 return snprintf(buf, PAGE_SIZE, "%d\n", value); 5615} 5616 5617#define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 5618 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 5619 thermal_temp_input_show, NULL, _idxB) 5620 5621static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 5622 THERMAL_SENSOR_ATTR_TEMP(1, 0), 5623 THERMAL_SENSOR_ATTR_TEMP(2, 1), 5624 THERMAL_SENSOR_ATTR_TEMP(3, 2), 5625 THERMAL_SENSOR_ATTR_TEMP(4, 3), 5626 THERMAL_SENSOR_ATTR_TEMP(5, 4), 5627 THERMAL_SENSOR_ATTR_TEMP(6, 5), 5628 THERMAL_SENSOR_ATTR_TEMP(7, 6), 5629 THERMAL_SENSOR_ATTR_TEMP(8, 7), 5630 THERMAL_SENSOR_ATTR_TEMP(9, 8), 5631 THERMAL_SENSOR_ATTR_TEMP(10, 9), 5632 THERMAL_SENSOR_ATTR_TEMP(11, 10), 5633 THERMAL_SENSOR_ATTR_TEMP(12, 11), 5634 THERMAL_SENSOR_ATTR_TEMP(13, 12), 5635 THERMAL_SENSOR_ATTR_TEMP(14, 13), 5636 THERMAL_SENSOR_ATTR_TEMP(15, 14), 5637 THERMAL_SENSOR_ATTR_TEMP(16, 15), 5638}; 5639 5640#define THERMAL_ATTRS(X) \ 5641 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 5642 5643static struct attribute *thermal_temp_input_attr[] = { 5644 THERMAL_ATTRS(8), 5645 THERMAL_ATTRS(9), 5646 THERMAL_ATTRS(10), 5647 THERMAL_ATTRS(11), 5648 THERMAL_ATTRS(12), 5649 THERMAL_ATTRS(13), 5650 THERMAL_ATTRS(14), 5651 THERMAL_ATTRS(15), 5652 THERMAL_ATTRS(0), 5653 THERMAL_ATTRS(1), 5654 THERMAL_ATTRS(2), 5655 THERMAL_ATTRS(3), 5656 THERMAL_ATTRS(4), 5657 THERMAL_ATTRS(5), 5658 THERMAL_ATTRS(6), 5659 THERMAL_ATTRS(7), 5660 NULL 5661}; 5662 5663static const struct attribute_group thermal_temp_input16_group = { 5664 .attrs = thermal_temp_input_attr 5665}; 5666 5667static const struct attribute_group thermal_temp_input8_group = { 5668 .attrs = &thermal_temp_input_attr[8] 5669}; 5670 5671#undef THERMAL_SENSOR_ATTR_TEMP 5672#undef THERMAL_ATTRS 5673 5674/* --------------------------------------------------------------------- */ 5675 5676static int __init thermal_init(struct ibm_init_struct *iibm) 5677{ 5678 u8 t, ta1, ta2; 5679 int i; 5680 int acpi_tmp7; 5681 int res; 5682 5683 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 5684 5685 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 5686 5687 if (thinkpad_id.ec_model) { 5688 /* 5689 * Direct EC access mode: sensors at registers 5690 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 5691 * non-implemented, thermal sensors return 0x80 when 5692 * not available 5693 */ 5694 5695 ta1 = ta2 = 0; 5696 for (i = 0; i < 8; i++) { 5697 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 5698 ta1 |= t; 5699 } else { 5700 ta1 = 0; 5701 break; 5702 } 5703 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 5704 ta2 |= t; 5705 } else { 5706 ta1 = 0; 5707 break; 5708 } 5709 } 5710 if (ta1 == 0) { 5711 /* This is sheer paranoia, but we handle it anyway */ 5712 if (acpi_tmp7) { 5713 printk(TPACPI_ERR 5714 "ThinkPad ACPI EC access misbehaving, " 5715 "falling back to ACPI TMPx access " 5716 "mode\n"); 5717 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5718 } else { 5719 printk(TPACPI_ERR 5720 "ThinkPad ACPI EC access misbehaving, " 5721 "disabling thermal sensors access\n"); 5722 thermal_read_mode = TPACPI_THERMAL_NONE; 5723 } 5724 } else { 5725 thermal_read_mode = 5726 (ta2 != 0) ? 5727 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 5728 } 5729 } else if (acpi_tmp7) { 5730 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 5731 /* 600e/x, 770e, 770x */ 5732 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 5733 } else { 5734 /* Standard ACPI TMPx access, max 8 sensors */ 5735 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5736 } 5737 } else { 5738 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 5739 thermal_read_mode = TPACPI_THERMAL_NONE; 5740 } 5741 5742 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 5743 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 5744 thermal_read_mode); 5745 5746 switch (thermal_read_mode) { 5747 case TPACPI_THERMAL_TPEC_16: 5748 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5749 &thermal_temp_input16_group); 5750 if (res) 5751 return res; 5752 break; 5753 case TPACPI_THERMAL_TPEC_8: 5754 case TPACPI_THERMAL_ACPI_TMP07: 5755 case TPACPI_THERMAL_ACPI_UPDT: 5756 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5757 &thermal_temp_input8_group); 5758 if (res) 5759 return res; 5760 break; 5761 case TPACPI_THERMAL_NONE: 5762 default: 5763 return 1; 5764 } 5765 5766 return 0; 5767} 5768 5769static void thermal_exit(void) 5770{ 5771 switch (thermal_read_mode) { 5772 case TPACPI_THERMAL_TPEC_16: 5773 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5774 &thermal_temp_input16_group); 5775 break; 5776 case TPACPI_THERMAL_TPEC_8: 5777 case TPACPI_THERMAL_ACPI_TMP07: 5778 case TPACPI_THERMAL_ACPI_UPDT: 5779 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5780 &thermal_temp_input16_group); 5781 break; 5782 case TPACPI_THERMAL_NONE: 5783 default: 5784 break; 5785 } 5786} 5787 5788static int thermal_read(char *p) 5789{ 5790 int len = 0; 5791 int n, i; 5792 struct ibm_thermal_sensors_struct t; 5793 5794 n = thermal_get_sensors(&t); 5795 if (unlikely(n < 0)) 5796 return n; 5797 5798 len += sprintf(p + len, "temperatures:\t"); 5799 5800 if (n > 0) { 5801 for (i = 0; i < (n - 1); i++) 5802 len += sprintf(p + len, "%d ", t.temp[i] / 1000); 5803 len += sprintf(p + len, "%d\n", t.temp[i] / 1000); 5804 } else 5805 len += sprintf(p + len, "not supported\n"); 5806 5807 return len; 5808} 5809 5810static struct ibm_struct thermal_driver_data = { 5811 .name = "thermal", 5812 .read = thermal_read, 5813 .exit = thermal_exit, 5814}; 5815 5816/************************************************************************* 5817 * EC Dump subdriver 5818 */ 5819 5820static u8 ecdump_regs[256]; 5821 5822static int ecdump_read(char *p) 5823{ 5824 int len = 0; 5825 int i, j; 5826 u8 v; 5827 5828 len += sprintf(p + len, "EC " 5829 " +00 +01 +02 +03 +04 +05 +06 +07" 5830 " +08 +09 +0a +0b +0c +0d +0e +0f\n"); 5831 for (i = 0; i < 256; i += 16) { 5832 len += sprintf(p + len, "EC 0x%02x:", i); 5833 for (j = 0; j < 16; j++) { 5834 if (!acpi_ec_read(i + j, &v)) 5835 break; 5836 if (v != ecdump_regs[i + j]) 5837 len += sprintf(p + len, " *%02x", v); 5838 else 5839 len += sprintf(p + len, " %02x", v); 5840 ecdump_regs[i + j] = v; 5841 } 5842 len += sprintf(p + len, "\n"); 5843 if (j != 16) 5844 break; 5845 } 5846 5847 /* These are way too dangerous to advertise openly... */ 5848#if 0 5849 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>" 5850 " (<offset> is 00-ff, <value> is 00-ff)\n"); 5851 len += sprintf(p + len, "commands:\t0x<offset> <value> " 5852 " (<offset> is 00-ff, <value> is 0-255)\n"); 5853#endif 5854 return len; 5855} 5856 5857static int ecdump_write(char *buf) 5858{ 5859 char *cmd; 5860 int i, v; 5861 5862 while ((cmd = next_cmd(&buf))) { 5863 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) { 5864 /* i and v set */ 5865 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) { 5866 /* i and v set */ 5867 } else 5868 return -EINVAL; 5869 if (i >= 0 && i < 256 && v >= 0 && v < 256) { 5870 if (!acpi_ec_write(i, v)) 5871 return -EIO; 5872 } else 5873 return -EINVAL; 5874 } 5875 5876 return 0; 5877} 5878 5879static struct ibm_struct ecdump_driver_data = { 5880 .name = "ecdump", 5881 .read = ecdump_read, 5882 .write = ecdump_write, 5883 .flags.experimental = 1, 5884}; 5885 5886/************************************************************************* 5887 * Backlight/brightness subdriver 5888 */ 5889 5890#define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 5891 5892/* 5893 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 5894 * CMOS NVRAM byte 0x5E, bits 0-3. 5895 * 5896 * EC HBRV (0x31) has the following layout 5897 * Bit 7: unknown function 5898 * Bit 6: unknown function 5899 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 5900 * Bit 4: must be set to zero to avoid problems 5901 * Bit 3-0: backlight brightness level 5902 * 5903 * brightness_get_raw returns status data in the HBRV layout 5904 * 5905 * WARNING: The X61 has been verified to use HBRV for something else, so 5906 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 5907 * testing on the very early *60 Lenovo models... 5908 */ 5909 5910enum { 5911 TP_EC_BACKLIGHT = 0x31, 5912 5913 /* TP_EC_BACKLIGHT bitmasks */ 5914 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 5915 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 5916 TP_EC_BACKLIGHT_MAPSW = 0x20, 5917}; 5918 5919enum tpacpi_brightness_access_mode { 5920 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 5921 TPACPI_BRGHT_MODE_EC, /* EC control */ 5922 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 5923 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 5924 TPACPI_BRGHT_MODE_MAX 5925}; 5926 5927static struct backlight_device *ibm_backlight_device; 5928 5929static enum tpacpi_brightness_access_mode brightness_mode = 5930 TPACPI_BRGHT_MODE_MAX; 5931 5932static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 5933 5934static struct mutex brightness_mutex; 5935 5936/* NVRAM brightness access, 5937 * call with brightness_mutex held! */ 5938static unsigned int tpacpi_brightness_nvram_get(void) 5939{ 5940 u8 lnvram; 5941 5942 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 5943 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5944 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 5945 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07; 5946 5947 return lnvram; 5948} 5949 5950static void tpacpi_brightness_checkpoint_nvram(void) 5951{ 5952 u8 lec = 0; 5953 u8 b_nvram; 5954 5955 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 5956 return; 5957 5958 vdbg_printk(TPACPI_DBG_BRGHT, 5959 "trying to checkpoint backlight level to NVRAM...\n"); 5960 5961 if (mutex_lock_killable(&brightness_mutex) < 0) 5962 return; 5963 5964 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5965 goto unlock; 5966 lec &= TP_EC_BACKLIGHT_LVLMSK; 5967 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 5968 5969 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5970 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 5971 /* NVRAM needs update */ 5972 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 5973 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 5974 b_nvram |= lec; 5975 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 5976 dbg_printk(TPACPI_DBG_BRGHT, 5977 "updated NVRAM backlight level to %u (0x%02x)\n", 5978 (unsigned int) lec, (unsigned int) b_nvram); 5979 } else 5980 vdbg_printk(TPACPI_DBG_BRGHT, 5981 "NVRAM backlight level already is %u (0x%02x)\n", 5982 (unsigned int) lec, (unsigned int) b_nvram); 5983 5984unlock: 5985 mutex_unlock(&brightness_mutex); 5986} 5987 5988 5989/* call with brightness_mutex held! */ 5990static int tpacpi_brightness_get_raw(int *status) 5991{ 5992 u8 lec = 0; 5993 5994 switch (brightness_mode) { 5995 case TPACPI_BRGHT_MODE_UCMS_STEP: 5996 *status = tpacpi_brightness_nvram_get(); 5997 return 0; 5998 case TPACPI_BRGHT_MODE_EC: 5999 case TPACPI_BRGHT_MODE_ECNVRAM: 6000 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6001 return -EIO; 6002 *status = lec; 6003 return 0; 6004 default: 6005 return -ENXIO; 6006 } 6007} 6008 6009/* call with brightness_mutex held! */ 6010/* do NOT call with illegal backlight level value */ 6011static int tpacpi_brightness_set_ec(unsigned int value) 6012{ 6013 u8 lec = 0; 6014 6015 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6016 return -EIO; 6017 6018 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6019 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6020 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6021 return -EIO; 6022 6023 return 0; 6024} 6025 6026/* call with brightness_mutex held! */ 6027static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6028{ 6029 int cmos_cmd, inc; 6030 unsigned int current_value, i; 6031 6032 current_value = tpacpi_brightness_nvram_get(); 6033 6034 if (value == current_value) 6035 return 0; 6036 6037 cmos_cmd = (value > current_value) ? 6038 TP_CMOS_BRIGHTNESS_UP : 6039 TP_CMOS_BRIGHTNESS_DOWN; 6040 inc = (value > current_value) ? 1 : -1; 6041 6042 for (i = current_value; i != value; i += inc) 6043 if (issue_thinkpad_cmos_command(cmos_cmd)) 6044 return -EIO; 6045 6046 return 0; 6047} 6048 6049/* May return EINTR which can always be mapped to ERESTARTSYS */ 6050static int brightness_set(unsigned int value) 6051{ 6052 int res; 6053 6054 if (value > ((tp_features.bright_16levels)? 15 : 7) || 6055 value < 0) 6056 return -EINVAL; 6057 6058 vdbg_printk(TPACPI_DBG_BRGHT, 6059 "set backlight level to %d\n", value); 6060 6061 res = mutex_lock_killable(&brightness_mutex); 6062 if (res < 0) 6063 return res; 6064 6065 switch (brightness_mode) { 6066 case TPACPI_BRGHT_MODE_EC: 6067 case TPACPI_BRGHT_MODE_ECNVRAM: 6068 res = tpacpi_brightness_set_ec(value); 6069 break; 6070 case TPACPI_BRGHT_MODE_UCMS_STEP: 6071 res = tpacpi_brightness_set_ucmsstep(value); 6072 break; 6073 default: 6074 res = -ENXIO; 6075 } 6076 6077 mutex_unlock(&brightness_mutex); 6078 return res; 6079} 6080 6081/* sysfs backlight class ----------------------------------------------- */ 6082 6083static int brightness_update_status(struct backlight_device *bd) 6084{ 6085 unsigned int level = 6086 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6087 bd->props.power == FB_BLANK_UNBLANK) ? 6088 bd->props.brightness : 0; 6089 6090 dbg_printk(TPACPI_DBG_BRGHT, 6091 "backlight: attempt to set level to %d\n", 6092 level); 6093 6094 /* it is the backlight class's job (caller) to handle 6095 * EINTR and other errors properly */ 6096 return brightness_set(level); 6097} 6098 6099static int brightness_get(struct backlight_device *bd) 6100{ 6101 int status, res; 6102 6103 res = mutex_lock_killable(&brightness_mutex); 6104 if (res < 0) 6105 return 0; 6106 6107 res = tpacpi_brightness_get_raw(&status); 6108 6109 mutex_unlock(&brightness_mutex); 6110 6111 if (res < 0) 6112 return 0; 6113 6114 return status & TP_EC_BACKLIGHT_LVLMSK; 6115} 6116 6117static void tpacpi_brightness_notify_change(void) 6118{ 6119 backlight_force_update(ibm_backlight_device, 6120 BACKLIGHT_UPDATE_HOTKEY); 6121} 6122 6123static struct backlight_ops ibm_backlight_data = { 6124 .get_brightness = brightness_get, 6125 .update_status = brightness_update_status, 6126}; 6127 6128/* --------------------------------------------------------------------- */ 6129 6130/* 6131 * These are only useful for models that have only one possibility 6132 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6133 * these quirks. 6134 */ 6135#define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6136#define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6137#define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6138 6139static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6140 /* Models with ATI GPUs known to require ECNVRAM mode */ 6141 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6142 6143 /* Models with ATI GPUs that can use ECNVRAM */ 6144 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), 6145 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6146 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6147 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6148 6149 /* Models with Intel Extreme Graphics 2 */ 6150 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), 6151 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6152 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6153 6154 /* Models with Intel GMA900 */ 6155 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6156 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6157 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6158}; 6159 6160static int __init brightness_init(struct ibm_init_struct *iibm) 6161{ 6162 int b; 6163 unsigned long quirks; 6164 6165 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6166 6167 mutex_init(&brightness_mutex); 6168 6169 quirks = tpacpi_check_quirks(brightness_quirk_table, 6170 ARRAY_SIZE(brightness_quirk_table)); 6171 6172 /* 6173 * We always attempt to detect acpi support, so as to switch 6174 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6175 * going to publish a backlight interface 6176 */ 6177 b = tpacpi_check_std_acpi_brightness_support(); 6178 if (b > 0) { 6179 6180 if (acpi_video_backlight_support()) { 6181 if (brightness_enable > 1) { 6182 printk(TPACPI_NOTICE 6183 "Standard ACPI backlight interface " 6184 "available, not loading native one.\n"); 6185 return 1; 6186 } else if (brightness_enable == 1) { 6187 printk(TPACPI_NOTICE 6188 "Backlight control force enabled, even if standard " 6189 "ACPI backlight interface is available\n"); 6190 } 6191 } else { 6192 if (brightness_enable > 1) { 6193 printk(TPACPI_NOTICE 6194 "Standard ACPI backlight interface not " 6195 "available, thinkpad_acpi native " 6196 "brightness control enabled\n"); 6197 } 6198 } 6199 } 6200 6201 if (!brightness_enable) { 6202 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6203 "brightness support disabled by " 6204 "module parameter\n"); 6205 return 1; 6206 } 6207 6208 if (b > 16) { 6209 printk(TPACPI_ERR 6210 "Unsupported brightness interface, " 6211 "please contact %s\n", TPACPI_MAIL); 6212 return 1; 6213 } 6214 if (b == 16) 6215 tp_features.bright_16levels = 1; 6216 6217 /* 6218 * Check for module parameter bogosity, note that we 6219 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6220 * able to detect "unspecified" 6221 */ 6222 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6223 return -EINVAL; 6224 6225 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6226 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6227 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6228 if (quirks & TPACPI_BRGHT_Q_EC) 6229 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6230 else 6231 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6232 6233 dbg_printk(TPACPI_DBG_BRGHT, 6234 "driver auto-selected brightness_mode=%d\n", 6235 brightness_mode); 6236 } 6237 6238 /* Safety */ 6239 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM && 6240 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6241 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6242 return -EINVAL; 6243 6244 if (tpacpi_brightness_get_raw(&b) < 0) 6245 return 1; 6246 6247 if (tp_features.bright_16levels) 6248 printk(TPACPI_INFO 6249 "detected a 16-level brightness capable ThinkPad\n"); 6250 6251 ibm_backlight_device = backlight_device_register( 6252 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL, 6253 &ibm_backlight_data); 6254 if (IS_ERR(ibm_backlight_device)) { 6255 int rc = PTR_ERR(ibm_backlight_device); 6256 ibm_backlight_device = NULL; 6257 printk(TPACPI_ERR "Could not register backlight device\n"); 6258 return rc; 6259 } 6260 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6261 "brightness is supported\n"); 6262 6263 if (quirks & TPACPI_BRGHT_Q_ASK) { 6264 printk(TPACPI_NOTICE 6265 "brightness: will use unverified default: " 6266 "brightness_mode=%d\n", brightness_mode); 6267 printk(TPACPI_NOTICE 6268 "brightness: please report to %s whether it works well " 6269 "or not on your ThinkPad\n", TPACPI_MAIL); 6270 } 6271 6272 ibm_backlight_device->props.max_brightness = 6273 (tp_features.bright_16levels)? 15 : 7; 6274 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6275 backlight_update_status(ibm_backlight_device); 6276 6277 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6278 "brightness: registering brightness hotkeys " 6279 "as change notification\n"); 6280 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6281 | TP_ACPI_HKEY_BRGHTUP_MASK 6282 | TP_ACPI_HKEY_BRGHTDWN_MASK);; 6283 return 0; 6284} 6285 6286static void brightness_suspend(pm_message_t state) 6287{ 6288 tpacpi_brightness_checkpoint_nvram(); 6289} 6290 6291static void brightness_shutdown(void) 6292{ 6293 tpacpi_brightness_checkpoint_nvram(); 6294} 6295 6296static void brightness_exit(void) 6297{ 6298 if (ibm_backlight_device) { 6299 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6300 "calling backlight_device_unregister()\n"); 6301 backlight_device_unregister(ibm_backlight_device); 6302 } 6303 6304 tpacpi_brightness_checkpoint_nvram(); 6305} 6306 6307static int brightness_read(char *p) 6308{ 6309 int len = 0; 6310 int level; 6311 6312 level = brightness_get(NULL); 6313 if (level < 0) { 6314 len += sprintf(p + len, "level:\t\tunreadable\n"); 6315 } else { 6316 len += sprintf(p + len, "level:\t\t%d\n", level); 6317 len += sprintf(p + len, "commands:\tup, down\n"); 6318 len += sprintf(p + len, "commands:\tlevel <level>" 6319 " (<level> is 0-%d)\n", 6320 (tp_features.bright_16levels) ? 15 : 7); 6321 } 6322 6323 return len; 6324} 6325 6326static int brightness_write(char *buf) 6327{ 6328 int level; 6329 int rc; 6330 char *cmd; 6331 int max_level = (tp_features.bright_16levels) ? 15 : 7; 6332 6333 level = brightness_get(NULL); 6334 if (level < 0) 6335 return level; 6336 6337 while ((cmd = next_cmd(&buf))) { 6338 if (strlencmp(cmd, "up") == 0) { 6339 if (level < max_level) 6340 level++; 6341 } else if (strlencmp(cmd, "down") == 0) { 6342 if (level > 0) 6343 level--; 6344 } else if (sscanf(cmd, "level %d", &level) == 1 && 6345 level >= 0 && level <= max_level) { 6346 /* new level set */ 6347 } else 6348 return -EINVAL; 6349 } 6350 6351 tpacpi_disclose_usertask("procfs brightness", 6352 "set level to %d\n", level); 6353 6354 /* 6355 * Now we know what the final level should be, so we try to set it. 6356 * Doing it this way makes the syscall restartable in case of EINTR 6357 */ 6358 rc = brightness_set(level); 6359 if (!rc && ibm_backlight_device) 6360 backlight_force_update(ibm_backlight_device, 6361 BACKLIGHT_UPDATE_SYSFS); 6362 return (rc == -EINTR)? -ERESTARTSYS : rc; 6363} 6364 6365static struct ibm_struct brightness_driver_data = { 6366 .name = "brightness", 6367 .read = brightness_read, 6368 .write = brightness_write, 6369 .exit = brightness_exit, 6370 .suspend = brightness_suspend, 6371 .shutdown = brightness_shutdown, 6372}; 6373 6374/************************************************************************* 6375 * Volume subdriver 6376 */ 6377 6378static int volume_offset = 0x30; 6379 6380static int volume_read(char *p) 6381{ 6382 int len = 0; 6383 u8 level; 6384 6385 if (!acpi_ec_read(volume_offset, &level)) { 6386 len += sprintf(p + len, "level:\t\tunreadable\n"); 6387 } else { 6388 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf); 6389 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6)); 6390 len += sprintf(p + len, "commands:\tup, down, mute\n"); 6391 len += sprintf(p + len, "commands:\tlevel <level>" 6392 " (<level> is 0-15)\n"); 6393 } 6394 6395 return len; 6396} 6397 6398static int volume_write(char *buf) 6399{ 6400 int cmos_cmd, inc, i; 6401 u8 level, mute; 6402 int new_level, new_mute; 6403 char *cmd; 6404 6405 while ((cmd = next_cmd(&buf))) { 6406 if (!acpi_ec_read(volume_offset, &level)) 6407 return -EIO; 6408 new_mute = mute = level & 0x40; 6409 new_level = level = level & 0xf; 6410 6411 if (strlencmp(cmd, "up") == 0) { 6412 if (mute) 6413 new_mute = 0; 6414 else 6415 new_level = level == 15 ? 15 : level + 1; 6416 } else if (strlencmp(cmd, "down") == 0) { 6417 if (mute) 6418 new_mute = 0; 6419 else 6420 new_level = level == 0 ? 0 : level - 1; 6421 } else if (sscanf(cmd, "level %d", &new_level) == 1 && 6422 new_level >= 0 && new_level <= 15) { 6423 /* new_level set */ 6424 } else if (strlencmp(cmd, "mute") == 0) { 6425 new_mute = 0x40; 6426 } else 6427 return -EINVAL; 6428 6429 if (new_level != level) { 6430 /* mute doesn't change */ 6431 6432 cmos_cmd = (new_level > level) ? 6433 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN; 6434 inc = new_level > level ? 1 : -1; 6435 6436 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) || 6437 !acpi_ec_write(volume_offset, level))) 6438 return -EIO; 6439 6440 for (i = level; i != new_level; i += inc) 6441 if (issue_thinkpad_cmos_command(cmos_cmd) || 6442 !acpi_ec_write(volume_offset, i + inc)) 6443 return -EIO; 6444 6445 if (mute && 6446 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) || 6447 !acpi_ec_write(volume_offset, new_level + mute))) { 6448 return -EIO; 6449 } 6450 } 6451 6452 if (new_mute != mute) { 6453 /* level doesn't change */ 6454 6455 cmos_cmd = (new_mute) ? 6456 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP; 6457 6458 if (issue_thinkpad_cmos_command(cmos_cmd) || 6459 !acpi_ec_write(volume_offset, level + new_mute)) 6460 return -EIO; 6461 } 6462 } 6463 6464 return 0; 6465} 6466 6467static struct ibm_struct volume_driver_data = { 6468 .name = "volume", 6469 .read = volume_read, 6470 .write = volume_write, 6471}; 6472 6473/************************************************************************* 6474 * Fan subdriver 6475 */ 6476 6477/* 6478 * FAN ACCESS MODES 6479 * 6480 * TPACPI_FAN_RD_ACPI_GFAN: 6481 * ACPI GFAN method: returns fan level 6482 * 6483 * see TPACPI_FAN_WR_ACPI_SFAN 6484 * EC 0x2f (HFSP) not available if GFAN exists 6485 * 6486 * TPACPI_FAN_WR_ACPI_SFAN: 6487 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 6488 * 6489 * EC 0x2f (HFSP) might be available *for reading*, but do not use 6490 * it for writing. 6491 * 6492 * TPACPI_FAN_WR_TPEC: 6493 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 6494 * Supported on almost all ThinkPads 6495 * 6496 * Fan speed changes of any sort (including those caused by the 6497 * disengaged mode) are usually done slowly by the firmware as the 6498 * maximum ammount of fan duty cycle change per second seems to be 6499 * limited. 6500 * 6501 * Reading is not available if GFAN exists. 6502 * Writing is not available if SFAN exists. 6503 * 6504 * Bits 6505 * 7 automatic mode engaged; 6506 * (default operation mode of the ThinkPad) 6507 * fan level is ignored in this mode. 6508 * 6 full speed mode (takes precedence over bit 7); 6509 * not available on all thinkpads. May disable 6510 * the tachometer while the fan controller ramps up 6511 * the speed (which can take up to a few *minutes*). 6512 * Speeds up fan to 100% duty-cycle, which is far above 6513 * the standard RPM levels. It is not impossible that 6514 * it could cause hardware damage. 6515 * 5-3 unused in some models. Extra bits for fan level 6516 * in others, but still useless as all values above 6517 * 7 map to the same speed as level 7 in these models. 6518 * 2-0 fan level (0..7 usually) 6519 * 0x00 = stop 6520 * 0x07 = max (set when temperatures critical) 6521 * Some ThinkPads may have other levels, see 6522 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 6523 * 6524 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 6525 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT 6526 * does so, its initial value is meaningless (0x07). 6527 * 6528 * For firmware bugs, refer to: 6529 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 6530 * 6531 * ---- 6532 * 6533 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 6534 * Main fan tachometer reading (in RPM) 6535 * 6536 * This register is present on all ThinkPads with a new-style EC, and 6537 * it is known not to be present on the A21m/e, and T22, as there is 6538 * something else in offset 0x84 according to the ACPI DSDT. Other 6539 * ThinkPads from this same time period (and earlier) probably lack the 6540 * tachometer as well. 6541 * 6542 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 6543 * was never fixed by IBM to report the EC firmware version string 6544 * probably support the tachometer (like the early X models), so 6545 * detecting it is quite hard. We need more data to know for sure. 6546 * 6547 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 6548 * might result. 6549 * 6550 * FIRMWARE BUG: may go stale while the EC is switching to full speed 6551 * mode. 6552 * 6553 * For firmware bugs, refer to: 6554 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 6555 * 6556 * ---- 6557 * 6558 * ThinkPad EC register 0x31 bit 0 (only on select models) 6559 * 6560 * When bit 0 of EC register 0x31 is zero, the tachometer registers 6561 * show the speed of the main fan. When bit 0 of EC register 0x31 6562 * is one, the tachometer registers show the speed of the auxiliary 6563 * fan. 6564 * 6565 * Fan control seems to affect both fans, regardless of the state 6566 * of this bit. 6567 * 6568 * So far, only the firmware for the X60/X61 non-tablet versions 6569 * seem to support this (firmware TP-7M). 6570 * 6571 * TPACPI_FAN_WR_ACPI_FANS: 6572 * ThinkPad X31, X40, X41. Not available in the X60. 6573 * 6574 * FANS ACPI handle: takes three arguments: low speed, medium speed, 6575 * high speed. ACPI DSDT seems to map these three speeds to levels 6576 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 6577 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 6578 * 6579 * The speeds are stored on handles 6580 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 6581 * 6582 * There are three default speed sets, acessible as handles: 6583 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 6584 * 6585 * ACPI DSDT switches which set is in use depending on various 6586 * factors. 6587 * 6588 * TPACPI_FAN_WR_TPEC is also available and should be used to 6589 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 6590 * but the ACPI tables just mention level 7. 6591 */ 6592 6593enum { /* Fan control constants */ 6594 fan_status_offset = 0x2f, /* EC register 0x2f */ 6595 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 6596 * 0x84 must be read before 0x85 */ 6597 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 6598 bit 0 selects which fan is active */ 6599 6600 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 6601 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 6602 6603 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 6604}; 6605 6606enum fan_status_access_mode { 6607 TPACPI_FAN_NONE = 0, /* No fan status or control */ 6608 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 6609 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 6610}; 6611 6612enum fan_control_access_mode { 6613 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 6614 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 6615 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 6616 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 6617}; 6618 6619enum fan_control_commands { 6620 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 6621 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 6622 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 6623 * and also watchdog cmd */ 6624}; 6625 6626static int fan_control_allowed; 6627 6628static enum fan_status_access_mode fan_status_access_mode; 6629static enum fan_control_access_mode fan_control_access_mode; 6630static enum fan_control_commands fan_control_commands; 6631 6632static u8 fan_control_initial_status; 6633static u8 fan_control_desired_level; 6634static u8 fan_control_resume_level; 6635static int fan_watchdog_maxinterval; 6636 6637static struct mutex fan_mutex; 6638 6639static void fan_watchdog_fire(struct work_struct *ignored); 6640static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 6641 6642TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 6643TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 6644 "\\FSPD", /* 600e/x, 770e, 770x */ 6645 ); /* all others */ 6646TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 6647 "JFNS", /* 770x-JL */ 6648 ); /* all others */ 6649 6650/* 6651 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 6652 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 6653 * be in auto mode (0x80). 6654 * 6655 * This is corrected by any write to HFSP either by the driver, or 6656 * by the firmware. 6657 * 6658 * We assume 0x07 really means auto mode while this quirk is active, 6659 * as this is far more likely than the ThinkPad being in level 7, 6660 * which is only used by the firmware during thermal emergencies. 6661 * 6662 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 6663 * TP-70 (T43, R52), which are known to be buggy. 6664 */ 6665 6666static void fan_quirk1_setup(void) 6667{ 6668 if (fan_control_initial_status == 0x07) { 6669 printk(TPACPI_NOTICE 6670 "fan_init: initial fan status is unknown, " 6671 "assuming it is in auto mode\n"); 6672 tp_features.fan_ctrl_status_undef = 1; 6673 } 6674} 6675 6676static void fan_quirk1_handle(u8 *fan_status) 6677{ 6678 if (unlikely(tp_features.fan_ctrl_status_undef)) { 6679 if (*fan_status != fan_control_initial_status) { 6680 /* something changed the HFSP regisnter since 6681 * driver init time, so it is not undefined 6682 * anymore */ 6683 tp_features.fan_ctrl_status_undef = 0; 6684 } else { 6685 /* Return most likely status. In fact, it 6686 * might be the only possible status */ 6687 *fan_status = TP_EC_FAN_AUTO; 6688 } 6689 } 6690} 6691 6692/* Select main fan on X60/X61, NOOP on others */ 6693static bool fan_select_fan1(void) 6694{ 6695 if (tp_features.second_fan) { 6696 u8 val; 6697 6698 if (ec_read(fan_select_offset, &val) < 0) 6699 return false; 6700 val &= 0xFEU; 6701 if (ec_write(fan_select_offset, val) < 0) 6702 return false; 6703 } 6704 return true; 6705} 6706 6707/* Select secondary fan on X60/X61 */ 6708static bool fan_select_fan2(void) 6709{ 6710 u8 val; 6711 6712 if (!tp_features.second_fan) 6713 return false; 6714 6715 if (ec_read(fan_select_offset, &val) < 0) 6716 return false; 6717 val |= 0x01U; 6718 if (ec_write(fan_select_offset, val) < 0) 6719 return false; 6720 6721 return true; 6722} 6723 6724/* 6725 * Call with fan_mutex held 6726 */ 6727static void fan_update_desired_level(u8 status) 6728{ 6729 if ((status & 6730 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 6731 if (status > 7) 6732 fan_control_desired_level = 7; 6733 else 6734 fan_control_desired_level = status; 6735 } 6736} 6737 6738static int fan_get_status(u8 *status) 6739{ 6740 u8 s; 6741 6742 /* TODO: 6743 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 6744 6745 switch (fan_status_access_mode) { 6746 case TPACPI_FAN_RD_ACPI_GFAN: 6747 /* 570, 600e/x, 770e, 770x */ 6748 6749 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d"))) 6750 return -EIO; 6751 6752 if (likely(status)) 6753 *status = s & 0x07; 6754 6755 break; 6756 6757 case TPACPI_FAN_RD_TPEC: 6758 /* all except 570, 600e/x, 770e, 770x */ 6759 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 6760 return -EIO; 6761 6762 if (likely(status)) { 6763 *status = s; 6764 fan_quirk1_handle(status); 6765 } 6766 6767 break; 6768 6769 default: 6770 return -ENXIO; 6771 } 6772 6773 return 0; 6774} 6775 6776static int fan_get_status_safe(u8 *status) 6777{ 6778 int rc; 6779 u8 s; 6780 6781 if (mutex_lock_killable(&fan_mutex)) 6782 return -ERESTARTSYS; 6783 rc = fan_get_status(&s); 6784 if (!rc) 6785 fan_update_desired_level(s); 6786 mutex_unlock(&fan_mutex); 6787 6788 if (status) 6789 *status = s; 6790 6791 return rc; 6792} 6793 6794static int fan_get_speed(unsigned int *speed) 6795{ 6796 u8 hi, lo; 6797 6798 switch (fan_status_access_mode) { 6799 case TPACPI_FAN_RD_TPEC: 6800 /* all except 570, 600e/x, 770e, 770x */ 6801 if (unlikely(!fan_select_fan1())) 6802 return -EIO; 6803 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 6804 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 6805 return -EIO; 6806 6807 if (likely(speed)) 6808 *speed = (hi << 8) | lo; 6809 6810 break; 6811 6812 default: 6813 return -ENXIO; 6814 } 6815 6816 return 0; 6817} 6818 6819static int fan2_get_speed(unsigned int *speed) 6820{ 6821 u8 hi, lo; 6822 bool rc; 6823 6824 switch (fan_status_access_mode) { 6825 case TPACPI_FAN_RD_TPEC: 6826 /* all except 570, 600e/x, 770e, 770x */ 6827 if (unlikely(!fan_select_fan2())) 6828 return -EIO; 6829 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 6830 !acpi_ec_read(fan_rpm_offset + 1, &hi); 6831 fan_select_fan1(); /* play it safe */ 6832 if (rc) 6833 return -EIO; 6834 6835 if (likely(speed)) 6836 *speed = (hi << 8) | lo; 6837 6838 break; 6839 6840 default: 6841 return -ENXIO; 6842 } 6843 6844 return 0; 6845} 6846 6847static int fan_set_level(int level) 6848{ 6849 if (!fan_control_allowed) 6850 return -EPERM; 6851 6852 switch (fan_control_access_mode) { 6853 case TPACPI_FAN_WR_ACPI_SFAN: 6854 if (level >= 0 && level <= 7) { 6855 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 6856 return -EIO; 6857 } else 6858 return -EINVAL; 6859 break; 6860 6861 case TPACPI_FAN_WR_ACPI_FANS: 6862 case TPACPI_FAN_WR_TPEC: 6863 if (!(level & TP_EC_FAN_AUTO) && 6864 !(level & TP_EC_FAN_FULLSPEED) && 6865 ((level < 0) || (level > 7))) 6866 return -EINVAL; 6867 6868 /* safety net should the EC not support AUTO 6869 * or FULLSPEED mode bits and just ignore them */ 6870 if (level & TP_EC_FAN_FULLSPEED) 6871 level |= 7; /* safety min speed 7 */ 6872 else if (level & TP_EC_FAN_AUTO) 6873 level |= 4; /* safety min speed 4 */ 6874 6875 if (!acpi_ec_write(fan_status_offset, level)) 6876 return -EIO; 6877 else 6878 tp_features.fan_ctrl_status_undef = 0; 6879 break; 6880 6881 default: 6882 return -ENXIO; 6883 } 6884 6885 vdbg_printk(TPACPI_DBG_FAN, 6886 "fan control: set fan control register to 0x%02x\n", level); 6887 return 0; 6888} 6889 6890static int fan_set_level_safe(int level) 6891{ 6892 int rc; 6893 6894 if (!fan_control_allowed) 6895 return -EPERM; 6896 6897 if (mutex_lock_killable(&fan_mutex)) 6898 return -ERESTARTSYS; 6899 6900 if (level == TPACPI_FAN_LAST_LEVEL) 6901 level = fan_control_desired_level; 6902 6903 rc = fan_set_level(level); 6904 if (!rc) 6905 fan_update_desired_level(level); 6906 6907 mutex_unlock(&fan_mutex); 6908 return rc; 6909} 6910 6911static int fan_set_enable(void) 6912{ 6913 u8 s; 6914 int rc; 6915 6916 if (!fan_control_allowed) 6917 return -EPERM; 6918 6919 if (mutex_lock_killable(&fan_mutex)) 6920 return -ERESTARTSYS; 6921 6922 switch (fan_control_access_mode) { 6923 case TPACPI_FAN_WR_ACPI_FANS: 6924 case TPACPI_FAN_WR_TPEC: 6925 rc = fan_get_status(&s); 6926 if (rc < 0) 6927 break; 6928 6929 /* Don't go out of emergency fan mode */ 6930 if (s != 7) { 6931 s &= 0x07; 6932 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 6933 } 6934 6935 if (!acpi_ec_write(fan_status_offset, s)) 6936 rc = -EIO; 6937 else { 6938 tp_features.fan_ctrl_status_undef = 0; 6939 rc = 0; 6940 } 6941 break; 6942 6943 case TPACPI_FAN_WR_ACPI_SFAN: 6944 rc = fan_get_status(&s); 6945 if (rc < 0) 6946 break; 6947 6948 s &= 0x07; 6949 6950 /* Set fan to at least level 4 */ 6951 s |= 4; 6952 6953 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 6954 rc = -EIO; 6955 else 6956 rc = 0; 6957 break; 6958 6959 default: 6960 rc = -ENXIO; 6961 } 6962 6963 mutex_unlock(&fan_mutex); 6964 6965 if (!rc) 6966 vdbg_printk(TPACPI_DBG_FAN, 6967 "fan control: set fan control register to 0x%02x\n", 6968 s); 6969 return rc; 6970} 6971 6972static int fan_set_disable(void) 6973{ 6974 int rc; 6975 6976 if (!fan_control_allowed) 6977 return -EPERM; 6978 6979 if (mutex_lock_killable(&fan_mutex)) 6980 return -ERESTARTSYS; 6981 6982 rc = 0; 6983 switch (fan_control_access_mode) { 6984 case TPACPI_FAN_WR_ACPI_FANS: 6985 case TPACPI_FAN_WR_TPEC: 6986 if (!acpi_ec_write(fan_status_offset, 0x00)) 6987 rc = -EIO; 6988 else { 6989 fan_control_desired_level = 0; 6990 tp_features.fan_ctrl_status_undef = 0; 6991 } 6992 break; 6993 6994 case TPACPI_FAN_WR_ACPI_SFAN: 6995 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 6996 rc = -EIO; 6997 else 6998 fan_control_desired_level = 0; 6999 break; 7000 7001 default: 7002 rc = -ENXIO; 7003 } 7004 7005 if (!rc) 7006 vdbg_printk(TPACPI_DBG_FAN, 7007 "fan control: set fan control register to 0\n"); 7008 7009 mutex_unlock(&fan_mutex); 7010 return rc; 7011} 7012 7013static int fan_set_speed(int speed) 7014{ 7015 int rc; 7016 7017 if (!fan_control_allowed) 7018 return -EPERM; 7019 7020 if (mutex_lock_killable(&fan_mutex)) 7021 return -ERESTARTSYS; 7022 7023 rc = 0; 7024 switch (fan_control_access_mode) { 7025 case TPACPI_FAN_WR_ACPI_FANS: 7026 if (speed >= 0 && speed <= 65535) { 7027 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 7028 speed, speed, speed)) 7029 rc = -EIO; 7030 } else 7031 rc = -EINVAL; 7032 break; 7033 7034 default: 7035 rc = -ENXIO; 7036 } 7037 7038 mutex_unlock(&fan_mutex); 7039 return rc; 7040} 7041 7042static void fan_watchdog_reset(void) 7043{ 7044 static int fan_watchdog_active; 7045 7046 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 7047 return; 7048 7049 if (fan_watchdog_active) 7050 cancel_delayed_work(&fan_watchdog_task); 7051 7052 if (fan_watchdog_maxinterval > 0 && 7053 tpacpi_lifecycle != TPACPI_LIFE_EXITING) { 7054 fan_watchdog_active = 1; 7055 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task, 7056 msecs_to_jiffies(fan_watchdog_maxinterval 7057 * 1000))) { 7058 printk(TPACPI_ERR 7059 "failed to queue the fan watchdog, " 7060 "watchdog will not trigger\n"); 7061 } 7062 } else 7063 fan_watchdog_active = 0; 7064} 7065 7066static void fan_watchdog_fire(struct work_struct *ignored) 7067{ 7068 int rc; 7069 7070 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 7071 return; 7072 7073 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n"); 7074 rc = fan_set_enable(); 7075 if (rc < 0) { 7076 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, " 7077 "will try again later...\n", -rc); 7078 /* reschedule for later */ 7079 fan_watchdog_reset(); 7080 } 7081} 7082 7083/* 7084 * SYSFS fan layout: hwmon compatible (device) 7085 * 7086 * pwm*_enable: 7087 * 0: "disengaged" mode 7088 * 1: manual mode 7089 * 2: native EC "auto" mode (recommended, hardware default) 7090 * 7091 * pwm*: set speed in manual mode, ignored otherwise. 7092 * 0 is level 0; 255 is level 7. Intermediate points done with linear 7093 * interpolation. 7094 * 7095 * fan*_input: tachometer reading, RPM 7096 * 7097 * 7098 * SYSFS fan layout: extensions 7099 * 7100 * fan_watchdog (driver): 7101 * fan watchdog interval in seconds, 0 disables (default), max 120 7102 */ 7103 7104/* sysfs fan pwm1_enable ----------------------------------------------- */ 7105static ssize_t fan_pwm1_enable_show(struct device *dev, 7106 struct device_attribute *attr, 7107 char *buf) 7108{ 7109 int res, mode; 7110 u8 status; 7111 7112 res = fan_get_status_safe(&status); 7113 if (res) 7114 return res; 7115 7116 if (status & TP_EC_FAN_FULLSPEED) { 7117 mode = 0; 7118 } else if (status & TP_EC_FAN_AUTO) { 7119 mode = 2; 7120 } else 7121 mode = 1; 7122 7123 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 7124} 7125 7126static ssize_t fan_pwm1_enable_store(struct device *dev, 7127 struct device_attribute *attr, 7128 const char *buf, size_t count) 7129{ 7130 unsigned long t; 7131 int res, level; 7132 7133 if (parse_strtoul(buf, 2, &t)) 7134 return -EINVAL; 7135 7136 tpacpi_disclose_usertask("hwmon pwm1_enable", 7137 "set fan mode to %lu\n", t); 7138 7139 switch (t) { 7140 case 0: 7141 level = TP_EC_FAN_FULLSPEED; 7142 break; 7143 case 1: 7144 level = TPACPI_FAN_LAST_LEVEL; 7145 break; 7146 case 2: 7147 level = TP_EC_FAN_AUTO; 7148 break; 7149 case 3: 7150 /* reserved for software-controlled auto mode */ 7151 return -ENOSYS; 7152 default: 7153 return -EINVAL; 7154 } 7155 7156 res = fan_set_level_safe(level); 7157 if (res == -ENXIO) 7158 return -EINVAL; 7159 else if (res < 0) 7160 return res; 7161 7162 fan_watchdog_reset(); 7163 7164 return count; 7165} 7166 7167static struct device_attribute dev_attr_fan_pwm1_enable = 7168 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 7169 fan_pwm1_enable_show, fan_pwm1_enable_store); 7170 7171/* sysfs fan pwm1 ------------------------------------------------------ */ 7172static ssize_t fan_pwm1_show(struct device *dev, 7173 struct device_attribute *attr, 7174 char *buf) 7175{ 7176 int res; 7177 u8 status; 7178 7179 res = fan_get_status_safe(&status); 7180 if (res) 7181 return res; 7182 7183 if ((status & 7184 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 7185 status = fan_control_desired_level; 7186 7187 if (status > 7) 7188 status = 7; 7189 7190 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 7191} 7192 7193static ssize_t fan_pwm1_store(struct device *dev, 7194 struct device_attribute *attr, 7195 const char *buf, size_t count) 7196{ 7197 unsigned long s; 7198 int rc; 7199 u8 status, newlevel; 7200 7201 if (parse_strtoul(buf, 255, &s)) 7202 return -EINVAL; 7203 7204 tpacpi_disclose_usertask("hwmon pwm1", 7205 "set fan speed to %lu\n", s); 7206 7207 /* scale down from 0-255 to 0-7 */ 7208 newlevel = (s >> 5) & 0x07; 7209 7210 if (mutex_lock_killable(&fan_mutex)) 7211 return -ERESTARTSYS; 7212 7213 rc = fan_get_status(&status); 7214 if (!rc && (status & 7215 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7216 rc = fan_set_level(newlevel); 7217 if (rc == -ENXIO) 7218 rc = -EINVAL; 7219 else if (!rc) { 7220 fan_update_desired_level(newlevel); 7221 fan_watchdog_reset(); 7222 } 7223 } 7224 7225 mutex_unlock(&fan_mutex); 7226 return (rc)? rc : count; 7227} 7228 7229static struct device_attribute dev_attr_fan_pwm1 = 7230 __ATTR(pwm1, S_IWUSR | S_IRUGO, 7231 fan_pwm1_show, fan_pwm1_store); 7232 7233/* sysfs fan fan1_input ------------------------------------------------ */ 7234static ssize_t fan_fan1_input_show(struct device *dev, 7235 struct device_attribute *attr, 7236 char *buf) 7237{ 7238 int res; 7239 unsigned int speed; 7240 7241 res = fan_get_speed(&speed); 7242 if (res < 0) 7243 return res; 7244 7245 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7246} 7247 7248static struct device_attribute dev_attr_fan_fan1_input = 7249 __ATTR(fan1_input, S_IRUGO, 7250 fan_fan1_input_show, NULL); 7251 7252/* sysfs fan fan2_input ------------------------------------------------ */ 7253static ssize_t fan_fan2_input_show(struct device *dev, 7254 struct device_attribute *attr, 7255 char *buf) 7256{ 7257 int res; 7258 unsigned int speed; 7259 7260 res = fan2_get_speed(&speed); 7261 if (res < 0) 7262 return res; 7263 7264 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7265} 7266 7267static struct device_attribute dev_attr_fan_fan2_input = 7268 __ATTR(fan2_input, S_IRUGO, 7269 fan_fan2_input_show, NULL); 7270 7271/* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 7272static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 7273 char *buf) 7274{ 7275 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 7276} 7277 7278static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 7279 const char *buf, size_t count) 7280{ 7281 unsigned long t; 7282 7283 if (parse_strtoul(buf, 120, &t)) 7284 return -EINVAL; 7285 7286 if (!fan_control_allowed) 7287 return -EPERM; 7288 7289 fan_watchdog_maxinterval = t; 7290 fan_watchdog_reset(); 7291 7292 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 7293 7294 return count; 7295} 7296 7297static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 7298 fan_fan_watchdog_show, fan_fan_watchdog_store); 7299 7300/* --------------------------------------------------------------------- */ 7301static struct attribute *fan_attributes[] = { 7302 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr, 7303 &dev_attr_fan_fan1_input.attr, 7304 NULL, /* for fan2_input */ 7305 NULL 7306}; 7307 7308static const struct attribute_group fan_attr_group = { 7309 .attrs = fan_attributes, 7310}; 7311 7312#define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 7313#define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 7314 7315#define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 7316 { .vendor = PCI_VENDOR_ID_IBM, \ 7317 .bios = TPACPI_MATCH_ANY, \ 7318 .ec = TPID(__id1, __id2), \ 7319 .quirks = __quirks } 7320 7321#define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 7322 { .vendor = PCI_VENDOR_ID_LENOVO, \ 7323 .bios = TPACPI_MATCH_ANY, \ 7324 .ec = TPID(__id1, __id2), \ 7325 .quirks = __quirks } 7326 7327static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 7328 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 7329 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 7330 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 7331 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 7332 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 7333}; 7334 7335#undef TPACPI_FAN_QL 7336#undef TPACPI_FAN_QI 7337 7338static int __init fan_init(struct ibm_init_struct *iibm) 7339{ 7340 int rc; 7341 unsigned long quirks; 7342 7343 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 7344 "initializing fan subdriver\n"); 7345 7346 mutex_init(&fan_mutex); 7347 fan_status_access_mode = TPACPI_FAN_NONE; 7348 fan_control_access_mode = TPACPI_FAN_WR_NONE; 7349 fan_control_commands = 0; 7350 fan_watchdog_maxinterval = 0; 7351 tp_features.fan_ctrl_status_undef = 0; 7352 tp_features.second_fan = 0; 7353 fan_control_desired_level = 7; 7354 7355 TPACPI_ACPIHANDLE_INIT(fans); 7356 TPACPI_ACPIHANDLE_INIT(gfan); 7357 TPACPI_ACPIHANDLE_INIT(sfan); 7358 7359 quirks = tpacpi_check_quirks(fan_quirk_table, 7360 ARRAY_SIZE(fan_quirk_table)); 7361 7362 if (gfan_handle) { 7363 /* 570, 600e/x, 770e, 770x */ 7364 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 7365 } else { 7366 /* all other ThinkPads: note that even old-style 7367 * ThinkPad ECs supports the fan control register */ 7368 if (likely(acpi_ec_read(fan_status_offset, 7369 &fan_control_initial_status))) { 7370 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 7371 if (quirks & TPACPI_FAN_Q1) 7372 fan_quirk1_setup(); 7373 if (quirks & TPACPI_FAN_2FAN) { 7374 tp_features.second_fan = 1; 7375 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 7376 "secondary fan support enabled\n"); 7377 } 7378 } else { 7379 printk(TPACPI_ERR 7380 "ThinkPad ACPI EC access misbehaving, " 7381 "fan status and control unavailable\n"); 7382 return 1; 7383 } 7384 } 7385 7386 if (sfan_handle) { 7387 /* 570, 770x-JL */ 7388 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 7389 fan_control_commands |= 7390 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 7391 } else { 7392 if (!gfan_handle) { 7393 /* gfan without sfan means no fan control */ 7394 /* all other models implement TP EC 0x2f control */ 7395 7396 if (fans_handle) { 7397 /* X31, X40, X41 */ 7398 fan_control_access_mode = 7399 TPACPI_FAN_WR_ACPI_FANS; 7400 fan_control_commands |= 7401 TPACPI_FAN_CMD_SPEED | 7402 TPACPI_FAN_CMD_LEVEL | 7403 TPACPI_FAN_CMD_ENABLE; 7404 } else { 7405 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 7406 fan_control_commands |= 7407 TPACPI_FAN_CMD_LEVEL | 7408 TPACPI_FAN_CMD_ENABLE; 7409 } 7410 } 7411 } 7412 7413 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 7414 "fan is %s, modes %d, %d\n", 7415 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 7416 fan_control_access_mode != TPACPI_FAN_WR_NONE), 7417 fan_status_access_mode, fan_control_access_mode); 7418 7419 /* fan control master switch */ 7420 if (!fan_control_allowed) { 7421 fan_control_access_mode = TPACPI_FAN_WR_NONE; 7422 fan_control_commands = 0; 7423 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 7424 "fan control features disabled by parameter\n"); 7425 } 7426 7427 /* update fan_control_desired_level */ 7428 if (fan_status_access_mode != TPACPI_FAN_NONE) 7429 fan_get_status_safe(NULL); 7430 7431 if (fan_status_access_mode != TPACPI_FAN_NONE || 7432 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 7433 if (tp_features.second_fan) { 7434 /* attach second fan tachometer */ 7435 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 7436 &dev_attr_fan_fan2_input.attr; 7437 } 7438 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 7439 &fan_attr_group); 7440 if (rc < 0) 7441 return rc; 7442 7443 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 7444 &driver_attr_fan_watchdog); 7445 if (rc < 0) { 7446 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 7447 &fan_attr_group); 7448 return rc; 7449 } 7450 return 0; 7451 } else 7452 return 1; 7453} 7454 7455static void fan_exit(void) 7456{ 7457 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 7458 "cancelling any pending fan watchdog tasks\n"); 7459 7460 /* FIXME: can we really do this unconditionally? */ 7461 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 7462 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 7463 &driver_attr_fan_watchdog); 7464 7465 cancel_delayed_work(&fan_watchdog_task); 7466 flush_workqueue(tpacpi_wq); 7467} 7468 7469static void fan_suspend(pm_message_t state) 7470{ 7471 int rc; 7472 7473 if (!fan_control_allowed) 7474 return; 7475 7476 /* Store fan status in cache */ 7477 fan_control_resume_level = 0; 7478 rc = fan_get_status_safe(&fan_control_resume_level); 7479 if (rc < 0) 7480 printk(TPACPI_NOTICE 7481 "failed to read fan level for later " 7482 "restore during resume: %d\n", rc); 7483 7484 /* if it is undefined, don't attempt to restore it. 7485 * KEEP THIS LAST */ 7486 if (tp_features.fan_ctrl_status_undef) 7487 fan_control_resume_level = 0; 7488} 7489 7490static void fan_resume(void) 7491{ 7492 u8 current_level = 7; 7493 bool do_set = false; 7494 int rc; 7495 7496 /* DSDT *always* updates status on resume */ 7497 tp_features.fan_ctrl_status_undef = 0; 7498 7499 if (!fan_control_allowed || 7500 !fan_control_resume_level || 7501 (fan_get_status_safe(¤t_level) < 0)) 7502 return; 7503 7504 switch (fan_control_access_mode) { 7505 case TPACPI_FAN_WR_ACPI_SFAN: 7506 /* never decrease fan level */ 7507 do_set = (fan_control_resume_level > current_level); 7508 break; 7509 case TPACPI_FAN_WR_ACPI_FANS: 7510 case TPACPI_FAN_WR_TPEC: 7511 /* never decrease fan level, scale is: 7512 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 7513 * 7514 * We expect the firmware to set either 7 or AUTO, but we 7515 * handle FULLSPEED out of paranoia. 7516 * 7517 * So, we can safely only restore FULLSPEED or 7, anything 7518 * else could slow the fan. Restoring AUTO is useless, at 7519 * best that's exactly what the DSDT already set (it is the 7520 * slower it uses). 7521 * 7522 * Always keep in mind that the DSDT *will* have set the 7523 * fans to what the vendor supposes is the best level. We 7524 * muck with it only to speed the fan up. 7525 */ 7526 if (fan_control_resume_level != 7 && 7527 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 7528 return; 7529 else 7530 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 7531 (current_level != fan_control_resume_level); 7532 break; 7533 default: 7534 return; 7535 } 7536 if (do_set) { 7537 printk(TPACPI_NOTICE 7538 "restoring fan level to 0x%02x\n", 7539 fan_control_resume_level); 7540 rc = fan_set_level_safe(fan_control_resume_level); 7541 if (rc < 0) 7542 printk(TPACPI_NOTICE 7543 "failed to restore fan level: %d\n", rc); 7544 } 7545} 7546 7547static int fan_read(char *p) 7548{ 7549 int len = 0; 7550 int rc; 7551 u8 status; 7552 unsigned int speed = 0; 7553 7554 switch (fan_status_access_mode) { 7555 case TPACPI_FAN_RD_ACPI_GFAN: 7556 /* 570, 600e/x, 770e, 770x */ 7557 rc = fan_get_status_safe(&status); 7558 if (rc < 0) 7559 return rc; 7560 7561 len += sprintf(p + len, "status:\t\t%s\n" 7562 "level:\t\t%d\n", 7563 (status != 0) ? "enabled" : "disabled", status); 7564 break; 7565 7566 case TPACPI_FAN_RD_TPEC: 7567 /* all except 570, 600e/x, 770e, 770x */ 7568 rc = fan_get_status_safe(&status); 7569 if (rc < 0) 7570 return rc; 7571 7572 len += sprintf(p + len, "status:\t\t%s\n", 7573 (status != 0) ? "enabled" : "disabled"); 7574 7575 rc = fan_get_speed(&speed); 7576 if (rc < 0) 7577 return rc; 7578 7579 len += sprintf(p + len, "speed:\t\t%d\n", speed); 7580 7581 if (status & TP_EC_FAN_FULLSPEED) 7582 /* Disengaged mode takes precedence */ 7583 len += sprintf(p + len, "level:\t\tdisengaged\n"); 7584 else if (status & TP_EC_FAN_AUTO) 7585 len += sprintf(p + len, "level:\t\tauto\n"); 7586 else 7587 len += sprintf(p + len, "level:\t\t%d\n", status); 7588 break; 7589 7590 case TPACPI_FAN_NONE: 7591 default: 7592 len += sprintf(p + len, "status:\t\tnot supported\n"); 7593 } 7594 7595 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 7596 len += sprintf(p + len, "commands:\tlevel <level>"); 7597 7598 switch (fan_control_access_mode) { 7599 case TPACPI_FAN_WR_ACPI_SFAN: 7600 len += sprintf(p + len, " (<level> is 0-7)\n"); 7601 break; 7602 7603 default: 7604 len += sprintf(p + len, " (<level> is 0-7, " 7605 "auto, disengaged, full-speed)\n"); 7606 break; 7607 } 7608 } 7609 7610 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 7611 len += sprintf(p + len, "commands:\tenable, disable\n" 7612 "commands:\twatchdog <timeout> (<timeout> " 7613 "is 0 (off), 1-120 (seconds))\n"); 7614 7615 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 7616 len += sprintf(p + len, "commands:\tspeed <speed>" 7617 " (<speed> is 0-65535)\n"); 7618 7619 return len; 7620} 7621 7622static int fan_write_cmd_level(const char *cmd, int *rc) 7623{ 7624 int level; 7625 7626 if (strlencmp(cmd, "level auto") == 0) 7627 level = TP_EC_FAN_AUTO; 7628 else if ((strlencmp(cmd, "level disengaged") == 0) | 7629 (strlencmp(cmd, "level full-speed") == 0)) 7630 level = TP_EC_FAN_FULLSPEED; 7631 else if (sscanf(cmd, "level %d", &level) != 1) 7632 return 0; 7633 7634 *rc = fan_set_level_safe(level); 7635 if (*rc == -ENXIO) 7636 printk(TPACPI_ERR "level command accepted for unsupported " 7637 "access mode %d", fan_control_access_mode); 7638 else if (!*rc) 7639 tpacpi_disclose_usertask("procfs fan", 7640 "set level to %d\n", level); 7641 7642 return 1; 7643} 7644 7645static int fan_write_cmd_enable(const char *cmd, int *rc) 7646{ 7647 if (strlencmp(cmd, "enable") != 0) 7648 return 0; 7649 7650 *rc = fan_set_enable(); 7651 if (*rc == -ENXIO) 7652 printk(TPACPI_ERR "enable command accepted for unsupported " 7653 "access mode %d", fan_control_access_mode); 7654 else if (!*rc) 7655 tpacpi_disclose_usertask("procfs fan", "enable\n"); 7656 7657 return 1; 7658} 7659 7660static int fan_write_cmd_disable(const char *cmd, int *rc) 7661{ 7662 if (strlencmp(cmd, "disable") != 0) 7663 return 0; 7664 7665 *rc = fan_set_disable(); 7666 if (*rc == -ENXIO) 7667 printk(TPACPI_ERR "disable command accepted for unsupported " 7668 "access mode %d", fan_control_access_mode); 7669 else if (!*rc) 7670 tpacpi_disclose_usertask("procfs fan", "disable\n"); 7671 7672 return 1; 7673} 7674 7675static int fan_write_cmd_speed(const char *cmd, int *rc) 7676{ 7677 int speed; 7678 7679 /* TODO: 7680 * Support speed <low> <medium> <high> ? */ 7681 7682 if (sscanf(cmd, "speed %d", &speed) != 1) 7683 return 0; 7684 7685 *rc = fan_set_speed(speed); 7686 if (*rc == -ENXIO) 7687 printk(TPACPI_ERR "speed command accepted for unsupported " 7688 "access mode %d", fan_control_access_mode); 7689 else if (!*rc) 7690 tpacpi_disclose_usertask("procfs fan", 7691 "set speed to %d\n", speed); 7692 7693 return 1; 7694} 7695 7696static int fan_write_cmd_watchdog(const char *cmd, int *rc) 7697{ 7698 int interval; 7699 7700 if (sscanf(cmd, "watchdog %d", &interval) != 1) 7701 return 0; 7702 7703 if (interval < 0 || interval > 120) 7704 *rc = -EINVAL; 7705 else { 7706 fan_watchdog_maxinterval = interval; 7707 tpacpi_disclose_usertask("procfs fan", 7708 "set watchdog timer to %d\n", 7709 interval); 7710 } 7711 7712 return 1; 7713} 7714 7715static int fan_write(char *buf) 7716{ 7717 char *cmd; 7718 int rc = 0; 7719 7720 while (!rc && (cmd = next_cmd(&buf))) { 7721 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 7722 fan_write_cmd_level(cmd, &rc)) && 7723 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 7724 (fan_write_cmd_enable(cmd, &rc) || 7725 fan_write_cmd_disable(cmd, &rc) || 7726 fan_write_cmd_watchdog(cmd, &rc))) && 7727 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 7728 fan_write_cmd_speed(cmd, &rc)) 7729 ) 7730 rc = -EINVAL; 7731 else if (!rc) 7732 fan_watchdog_reset(); 7733 } 7734 7735 return rc; 7736} 7737 7738static struct ibm_struct fan_driver_data = { 7739 .name = "fan", 7740 .read = fan_read, 7741 .write = fan_write, 7742 .exit = fan_exit, 7743 .suspend = fan_suspend, 7744 .resume = fan_resume, 7745}; 7746 7747/**************************************************************************** 7748 **************************************************************************** 7749 * 7750 * Infrastructure 7751 * 7752 **************************************************************************** 7753 ****************************************************************************/ 7754 7755/* 7756 * HKEY event callout for other subdrivers go here 7757 * (yes, it is ugly, but it is quick, safe, and gets the job done 7758 */ 7759static void tpacpi_driver_event(const unsigned int hkey_event) 7760{ 7761 if (ibm_backlight_device) { 7762 switch (hkey_event) { 7763 case TP_HKEY_EV_BRGHT_UP: 7764 case TP_HKEY_EV_BRGHT_DOWN: 7765 tpacpi_brightness_notify_change(); 7766 } 7767 } 7768} 7769 7770 7771 7772static void hotkey_driver_event(const unsigned int scancode) 7773{ 7774 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 7775} 7776 7777/* sysfs name ---------------------------------------------------------- */ 7778static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 7779 struct device_attribute *attr, 7780 char *buf) 7781{ 7782 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 7783} 7784 7785static struct device_attribute dev_attr_thinkpad_acpi_pdev_name = 7786 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 7787 7788/* --------------------------------------------------------------------- */ 7789 7790/* /proc support */ 7791static struct proc_dir_entry *proc_dir; 7792 7793/* 7794 * Module and infrastructure proble, init and exit handling 7795 */ 7796 7797static int force_load; 7798 7799#ifdef CONFIG_THINKPAD_ACPI_DEBUG 7800static const char * __init str_supported(int is_supported) 7801{ 7802 static char text_unsupported[] __initdata = "not supported"; 7803 7804 return (is_supported)? &text_unsupported[4] : &text_unsupported[0]; 7805} 7806#endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 7807 7808static void ibm_exit(struct ibm_struct *ibm) 7809{ 7810 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 7811 7812 list_del_init(&ibm->all_drivers); 7813 7814 if (ibm->flags.acpi_notify_installed) { 7815 dbg_printk(TPACPI_DBG_EXIT, 7816 "%s: acpi_remove_notify_handler\n", ibm->name); 7817 BUG_ON(!ibm->acpi); 7818 acpi_remove_notify_handler(*ibm->acpi->handle, 7819 ibm->acpi->type, 7820 dispatch_acpi_notify); 7821 ibm->flags.acpi_notify_installed = 0; 7822 ibm->flags.acpi_notify_installed = 0; 7823 } 7824 7825 if (ibm->flags.proc_created) { 7826 dbg_printk(TPACPI_DBG_EXIT, 7827 "%s: remove_proc_entry\n", ibm->name); 7828 remove_proc_entry(ibm->name, proc_dir); 7829 ibm->flags.proc_created = 0; 7830 } 7831 7832 if (ibm->flags.acpi_driver_registered) { 7833 dbg_printk(TPACPI_DBG_EXIT, 7834 "%s: acpi_bus_unregister_driver\n", ibm->name); 7835 BUG_ON(!ibm->acpi); 7836 acpi_bus_unregister_driver(ibm->acpi->driver); 7837 kfree(ibm->acpi->driver); 7838 ibm->acpi->driver = NULL; 7839 ibm->flags.acpi_driver_registered = 0; 7840 } 7841 7842 if (ibm->flags.init_called && ibm->exit) { 7843 ibm->exit(); 7844 ibm->flags.init_called = 0; 7845 } 7846 7847 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 7848} 7849 7850static int __init ibm_init(struct ibm_init_struct *iibm) 7851{ 7852 int ret; 7853 struct ibm_struct *ibm = iibm->data; 7854 struct proc_dir_entry *entry; 7855 7856 BUG_ON(ibm == NULL); 7857 7858 INIT_LIST_HEAD(&ibm->all_drivers); 7859 7860 if (ibm->flags.experimental && !experimental) 7861 return 0; 7862 7863 dbg_printk(TPACPI_DBG_INIT, 7864 "probing for %s\n", ibm->name); 7865 7866 if (iibm->init) { 7867 ret = iibm->init(iibm); 7868 if (ret > 0) 7869 return 0; /* probe failed */ 7870 if (ret) 7871 return ret; 7872 7873 ibm->flags.init_called = 1; 7874 } 7875 7876 if (ibm->acpi) { 7877 if (ibm->acpi->hid) { 7878 ret = register_tpacpi_subdriver(ibm); 7879 if (ret) 7880 goto err_out; 7881 } 7882 7883 if (ibm->acpi->notify) { 7884 ret = setup_acpi_notify(ibm); 7885 if (ret == -ENODEV) { 7886 printk(TPACPI_NOTICE "disabling subdriver %s\n", 7887 ibm->name); 7888 ret = 0; 7889 goto err_out; 7890 } 7891 if (ret < 0) 7892 goto err_out; 7893 } 7894 } 7895 7896 dbg_printk(TPACPI_DBG_INIT, 7897 "%s installed\n", ibm->name); 7898 7899 if (ibm->read) { 7900 entry = create_proc_entry(ibm->name, 7901 S_IFREG | S_IRUGO | S_IWUSR, 7902 proc_dir); 7903 if (!entry) { 7904 printk(TPACPI_ERR "unable to create proc entry %s\n", 7905 ibm->name); 7906 ret = -ENODEV; 7907 goto err_out; 7908 } 7909 entry->data = ibm; 7910 entry->read_proc = &dispatch_procfs_read; 7911 if (ibm->write) 7912 entry->write_proc = &dispatch_procfs_write; 7913 ibm->flags.proc_created = 1; 7914 } 7915 7916 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 7917 7918 return 0; 7919 7920err_out: 7921 dbg_printk(TPACPI_DBG_INIT, 7922 "%s: at error exit path with result %d\n", 7923 ibm->name, ret); 7924 7925 ibm_exit(ibm); 7926 return (ret < 0)? ret : 0; 7927} 7928 7929/* Probing */ 7930 7931static bool __pure __init tpacpi_is_fw_digit(const char c) 7932{ 7933 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 7934} 7935 7936/* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */ 7937static bool __pure __init tpacpi_is_valid_fw_id(const char* const s, 7938 const char t) 7939{ 7940 return s && strlen(s) >= 8 && 7941 tpacpi_is_fw_digit(s[0]) && 7942 tpacpi_is_fw_digit(s[1]) && 7943 s[2] == t && s[3] == 'T' && 7944 tpacpi_is_fw_digit(s[4]) && 7945 tpacpi_is_fw_digit(s[5]) && 7946 s[6] == 'W' && s[7] == 'W'; 7947} 7948 7949/* returns 0 - probe ok, or < 0 - probe error. 7950 * Probe ok doesn't mean thinkpad found. 7951 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 7952static int __must_check __init get_thinkpad_model_data( 7953 struct thinkpad_id_data *tp) 7954{ 7955 const struct dmi_device *dev = NULL; 7956 char ec_fw_string[18]; 7957 char const *s; 7958 7959 if (!tp) 7960 return -EINVAL; 7961 7962 memset(tp, 0, sizeof(*tp)); 7963 7964 if (dmi_name_in_vendors("IBM")) 7965 tp->vendor = PCI_VENDOR_ID_IBM; 7966 else if (dmi_name_in_vendors("LENOVO")) 7967 tp->vendor = PCI_VENDOR_ID_LENOVO; 7968 else 7969 return 0; 7970 7971 s = dmi_get_system_info(DMI_BIOS_VERSION); 7972 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 7973 if (s && !tp->bios_version_str) 7974 return -ENOMEM; 7975 7976 /* Really ancient ThinkPad 240X will fail this, which is fine */ 7977 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E')) 7978 return 0; 7979 7980 tp->bios_model = tp->bios_version_str[0] 7981 | (tp->bios_version_str[1] << 8); 7982 tp->bios_release = (tp->bios_version_str[4] << 8) 7983 | tp->bios_version_str[5]; 7984 7985 /* 7986 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 7987 * X32 or newer, all Z series; Some models must have an 7988 * up-to-date BIOS or they will not be detected. 7989 * 7990 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 7991 */ 7992 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 7993 if (sscanf(dev->name, 7994 "IBM ThinkPad Embedded Controller -[%17c", 7995 ec_fw_string) == 1) { 7996 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 7997 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 7998 7999 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 8000 if (!tp->ec_version_str) 8001 return -ENOMEM; 8002 8003 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 8004 tp->ec_model = ec_fw_string[0] 8005 | (ec_fw_string[1] << 8); 8006 tp->ec_release = (ec_fw_string[4] << 8) 8007 | ec_fw_string[5]; 8008 } else { 8009 printk(TPACPI_NOTICE 8010 "ThinkPad firmware release %s " 8011 "doesn't match the known patterns\n", 8012 ec_fw_string); 8013 printk(TPACPI_NOTICE 8014 "please report this to %s\n", 8015 TPACPI_MAIL); 8016 } 8017 break; 8018 } 8019 } 8020 8021 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 8022 if (s && !strnicmp(s, "ThinkPad", 8)) { 8023 tp->model_str = kstrdup(s, GFP_KERNEL); 8024 if (!tp->model_str) 8025 return -ENOMEM; 8026 } 8027 8028 s = dmi_get_system_info(DMI_PRODUCT_NAME); 8029 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 8030 if (s && !tp->nummodel_str) 8031 return -ENOMEM; 8032 8033 return 0; 8034} 8035 8036static int __init probe_for_thinkpad(void) 8037{ 8038 int is_thinkpad; 8039 8040 if (acpi_disabled) 8041 return -ENODEV; 8042 8043 /* 8044 * Non-ancient models have better DMI tagging, but very old models 8045 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 8046 */ 8047 is_thinkpad = (thinkpad_id.model_str != NULL) || 8048 (thinkpad_id.ec_model != 0) || 8049 tpacpi_is_fw_known(); 8050 8051 /* ec is required because many other handles are relative to it */ 8052 TPACPI_ACPIHANDLE_INIT(ec); 8053 if (!ec_handle) { 8054 if (is_thinkpad) 8055 printk(TPACPI_ERR 8056 "Not yet supported ThinkPad detected!\n"); 8057 return -ENODEV; 8058 } 8059 8060 if (!is_thinkpad && !force_load) 8061 return -ENODEV; 8062 8063 return 0; 8064} 8065 8066 8067/* Module init, exit, parameters */ 8068 8069static struct ibm_init_struct ibms_init[] __initdata = { 8070 { 8071 .init = thinkpad_acpi_driver_init, 8072 .data = &thinkpad_acpi_driver_data, 8073 }, 8074 { 8075 .init = hotkey_init, 8076 .data = &hotkey_driver_data, 8077 }, 8078 { 8079 .init = bluetooth_init, 8080 .data = &bluetooth_driver_data, 8081 }, 8082 { 8083 .init = wan_init, 8084 .data = &wan_driver_data, 8085 }, 8086 { 8087 .init = uwb_init, 8088 .data = &uwb_driver_data, 8089 }, 8090#ifdef CONFIG_THINKPAD_ACPI_VIDEO 8091 { 8092 .init = video_init, 8093 .data = &video_driver_data, 8094 }, 8095#endif 8096 { 8097 .init = light_init, 8098 .data = &light_driver_data, 8099 }, 8100 { 8101 .init = cmos_init, 8102 .data = &cmos_driver_data, 8103 }, 8104 { 8105 .init = led_init, 8106 .data = &led_driver_data, 8107 }, 8108 { 8109 .init = beep_init, 8110 .data = &beep_driver_data, 8111 }, 8112 { 8113 .init = thermal_init, 8114 .data = &thermal_driver_data, 8115 }, 8116 { 8117 .data = &ecdump_driver_data, 8118 }, 8119 { 8120 .init = brightness_init, 8121 .data = &brightness_driver_data, 8122 }, 8123 { 8124 .data = &volume_driver_data, 8125 }, 8126 { 8127 .init = fan_init, 8128 .data = &fan_driver_data, 8129 }, 8130}; 8131 8132static int __init set_ibm_param(const char *val, struct kernel_param *kp) 8133{ 8134 unsigned int i; 8135 struct ibm_struct *ibm; 8136 8137 if (!kp || !kp->name || !val) 8138 return -EINVAL; 8139 8140 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 8141 ibm = ibms_init[i].data; 8142 WARN_ON(ibm == NULL); 8143 8144 if (!ibm || !ibm->name) 8145 continue; 8146 8147 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 8148 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 8149 return -ENOSPC; 8150 strcpy(ibms_init[i].param, val); 8151 strcat(ibms_init[i].param, ","); 8152 return 0; 8153 } 8154 } 8155 8156 return -EINVAL; 8157} 8158 8159module_param(experimental, int, 0444); 8160MODULE_PARM_DESC(experimental, 8161 "Enables experimental features when non-zero"); 8162 8163module_param_named(debug, dbg_level, uint, 0); 8164MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 8165 8166module_param(force_load, bool, 0444); 8167MODULE_PARM_DESC(force_load, 8168 "Attempts to load the driver even on a " 8169 "mis-identified ThinkPad when true"); 8170 8171module_param_named(fan_control, fan_control_allowed, bool, 0444); 8172MODULE_PARM_DESC(fan_control, 8173 "Enables setting fan parameters features when true"); 8174 8175module_param_named(brightness_mode, brightness_mode, uint, 0444); 8176MODULE_PARM_DESC(brightness_mode, 8177 "Selects brightness control strategy: " 8178 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 8179 8180module_param(brightness_enable, uint, 0444); 8181MODULE_PARM_DESC(brightness_enable, 8182 "Enables backlight control when 1, disables when 0"); 8183 8184module_param(hotkey_report_mode, uint, 0444); 8185MODULE_PARM_DESC(hotkey_report_mode, 8186 "used for backwards compatibility with userspace, " 8187 "see documentation"); 8188 8189#define TPACPI_PARAM(feature) \ 8190 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 8191 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 8192 "at module load, see documentation") 8193 8194TPACPI_PARAM(hotkey); 8195TPACPI_PARAM(bluetooth); 8196TPACPI_PARAM(video); 8197TPACPI_PARAM(light); 8198TPACPI_PARAM(cmos); 8199TPACPI_PARAM(led); 8200TPACPI_PARAM(beep); 8201TPACPI_PARAM(ecdump); 8202TPACPI_PARAM(brightness); 8203TPACPI_PARAM(volume); 8204TPACPI_PARAM(fan); 8205 8206#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 8207module_param(dbg_wlswemul, uint, 0444); 8208MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 8209module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 8210MODULE_PARM_DESC(wlsw_state, 8211 "Initial state of the emulated WLSW switch"); 8212 8213module_param(dbg_bluetoothemul, uint, 0444); 8214MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 8215module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 8216MODULE_PARM_DESC(bluetooth_state, 8217 "Initial state of the emulated bluetooth switch"); 8218 8219module_param(dbg_wwanemul, uint, 0444); 8220MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 8221module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 8222MODULE_PARM_DESC(wwan_state, 8223 "Initial state of the emulated WWAN switch"); 8224 8225module_param(dbg_uwbemul, uint, 0444); 8226MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 8227module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 8228MODULE_PARM_DESC(uwb_state, 8229 "Initial state of the emulated UWB switch"); 8230#endif 8231 8232static void thinkpad_acpi_module_exit(void) 8233{ 8234 struct ibm_struct *ibm, *itmp; 8235 8236 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 8237 8238 list_for_each_entry_safe_reverse(ibm, itmp, 8239 &tpacpi_all_drivers, 8240 all_drivers) { 8241 ibm_exit(ibm); 8242 } 8243 8244 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 8245 8246 if (tpacpi_inputdev) { 8247 if (tp_features.input_device_registered) 8248 input_unregister_device(tpacpi_inputdev); 8249 else 8250 input_free_device(tpacpi_inputdev); 8251 } 8252 8253 if (tpacpi_hwmon) 8254 hwmon_device_unregister(tpacpi_hwmon); 8255 8256 if (tp_features.sensors_pdev_attrs_registered) 8257 device_remove_file(&tpacpi_sensors_pdev->dev, 8258 &dev_attr_thinkpad_acpi_pdev_name); 8259 if (tpacpi_sensors_pdev) 8260 platform_device_unregister(tpacpi_sensors_pdev); 8261 if (tpacpi_pdev) 8262 platform_device_unregister(tpacpi_pdev); 8263 8264 if (tp_features.sensors_pdrv_attrs_registered) 8265 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 8266 if (tp_features.platform_drv_attrs_registered) 8267 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 8268 8269 if (tp_features.sensors_pdrv_registered) 8270 platform_driver_unregister(&tpacpi_hwmon_pdriver); 8271 8272 if (tp_features.platform_drv_registered) 8273 platform_driver_unregister(&tpacpi_pdriver); 8274 8275 if (proc_dir) 8276 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 8277 8278 if (tpacpi_wq) 8279 destroy_workqueue(tpacpi_wq); 8280 8281 kfree(thinkpad_id.bios_version_str); 8282 kfree(thinkpad_id.ec_version_str); 8283 kfree(thinkpad_id.model_str); 8284} 8285 8286 8287static int __init thinkpad_acpi_module_init(void) 8288{ 8289 int ret, i; 8290 8291 tpacpi_lifecycle = TPACPI_LIFE_INIT; 8292 8293 /* Parameter checking */ 8294 if (hotkey_report_mode > 2) 8295 return -EINVAL; 8296 8297 /* Driver-level probe */ 8298 8299 ret = get_thinkpad_model_data(&thinkpad_id); 8300 if (ret) { 8301 printk(TPACPI_ERR 8302 "unable to get DMI data: %d\n", ret); 8303 thinkpad_acpi_module_exit(); 8304 return ret; 8305 } 8306 ret = probe_for_thinkpad(); 8307 if (ret) { 8308 thinkpad_acpi_module_exit(); 8309 return ret; 8310 } 8311 8312 /* Driver initialization */ 8313 8314 TPACPI_ACPIHANDLE_INIT(ecrd); 8315 TPACPI_ACPIHANDLE_INIT(ecwr); 8316 8317 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 8318 if (!tpacpi_wq) { 8319 thinkpad_acpi_module_exit(); 8320 return -ENOMEM; 8321 } 8322 8323 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 8324 if (!proc_dir) { 8325 printk(TPACPI_ERR 8326 "unable to create proc dir " TPACPI_PROC_DIR); 8327 thinkpad_acpi_module_exit(); 8328 return -ENODEV; 8329 } 8330 8331 ret = platform_driver_register(&tpacpi_pdriver); 8332 if (ret) { 8333 printk(TPACPI_ERR 8334 "unable to register main platform driver\n"); 8335 thinkpad_acpi_module_exit(); 8336 return ret; 8337 } 8338 tp_features.platform_drv_registered = 1; 8339 8340 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 8341 if (ret) { 8342 printk(TPACPI_ERR 8343 "unable to register hwmon platform driver\n"); 8344 thinkpad_acpi_module_exit(); 8345 return ret; 8346 } 8347 tp_features.sensors_pdrv_registered = 1; 8348 8349 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 8350 if (!ret) { 8351 tp_features.platform_drv_attrs_registered = 1; 8352 ret = tpacpi_create_driver_attributes( 8353 &tpacpi_hwmon_pdriver.driver); 8354 } 8355 if (ret) { 8356 printk(TPACPI_ERR 8357 "unable to create sysfs driver attributes\n"); 8358 thinkpad_acpi_module_exit(); 8359 return ret; 8360 } 8361 tp_features.sensors_pdrv_attrs_registered = 1; 8362 8363 8364 /* Device initialization */ 8365 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 8366 NULL, 0); 8367 if (IS_ERR(tpacpi_pdev)) { 8368 ret = PTR_ERR(tpacpi_pdev); 8369 tpacpi_pdev = NULL; 8370 printk(TPACPI_ERR "unable to register platform device\n"); 8371 thinkpad_acpi_module_exit(); 8372 return ret; 8373 } 8374 tpacpi_sensors_pdev = platform_device_register_simple( 8375 TPACPI_HWMON_DRVR_NAME, 8376 -1, NULL, 0); 8377 if (IS_ERR(tpacpi_sensors_pdev)) { 8378 ret = PTR_ERR(tpacpi_sensors_pdev); 8379 tpacpi_sensors_pdev = NULL; 8380 printk(TPACPI_ERR 8381 "unable to register hwmon platform device\n"); 8382 thinkpad_acpi_module_exit(); 8383 return ret; 8384 } 8385 ret = device_create_file(&tpacpi_sensors_pdev->dev, 8386 &dev_attr_thinkpad_acpi_pdev_name); 8387 if (ret) { 8388 printk(TPACPI_ERR 8389 "unable to create sysfs hwmon device attributes\n"); 8390 thinkpad_acpi_module_exit(); 8391 return ret; 8392 } 8393 tp_features.sensors_pdev_attrs_registered = 1; 8394 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 8395 if (IS_ERR(tpacpi_hwmon)) { 8396 ret = PTR_ERR(tpacpi_hwmon); 8397 tpacpi_hwmon = NULL; 8398 printk(TPACPI_ERR "unable to register hwmon device\n"); 8399 thinkpad_acpi_module_exit(); 8400 return ret; 8401 } 8402 mutex_init(&tpacpi_inputdev_send_mutex); 8403 tpacpi_inputdev = input_allocate_device(); 8404 if (!tpacpi_inputdev) { 8405 printk(TPACPI_ERR "unable to allocate input device\n"); 8406 thinkpad_acpi_module_exit(); 8407 return -ENOMEM; 8408 } else { 8409 /* Prepare input device, but don't register */ 8410 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 8411 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 8412 tpacpi_inputdev->id.bustype = BUS_HOST; 8413 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ? 8414 thinkpad_id.vendor : 8415 PCI_VENDOR_ID_IBM; 8416 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 8417 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 8418 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 8419 } 8420 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 8421 ret = ibm_init(&ibms_init[i]); 8422 if (ret >= 0 && *ibms_init[i].param) 8423 ret = ibms_init[i].data->write(ibms_init[i].param); 8424 if (ret < 0) { 8425 thinkpad_acpi_module_exit(); 8426 return ret; 8427 } 8428 } 8429 ret = input_register_device(tpacpi_inputdev); 8430 if (ret < 0) { 8431 printk(TPACPI_ERR "unable to register input device\n"); 8432 thinkpad_acpi_module_exit(); 8433 return ret; 8434 } else { 8435 tp_features.input_device_registered = 1; 8436 } 8437 8438 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 8439 return 0; 8440} 8441 8442MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 8443 8444/* 8445 * This will autoload the driver in almost every ThinkPad 8446 * in widespread use. 8447 * 8448 * Only _VERY_ old models, like the 240, 240x and 570 lack 8449 * the HKEY event interface. 8450 */ 8451MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 8452 8453/* 8454 * DMI matching for module autoloading 8455 * 8456 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 8457 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 8458 * 8459 * Only models listed in thinkwiki will be supported, so add yours 8460 * if it is not there yet. 8461 */ 8462#define IBM_BIOS_MODULE_ALIAS(__type) \ 8463 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 8464 8465/* Ancient thinkpad BIOSes have to be identified by 8466 * BIOS type or model number, and there are far less 8467 * BIOS types than model numbers... */ 8468IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 8469 8470MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 8471MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 8472MODULE_DESCRIPTION(TPACPI_DESC); 8473MODULE_VERSION(TPACPI_VERSION); 8474MODULE_LICENSE("GPL"); 8475 8476module_init(thinkpad_acpi_module_init); 8477module_exit(thinkpad_acpi_module_exit); 8478