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 0x020500 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 */ 94 enum 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 */ 103 enum { 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 */ 127 enum { 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 */ 135 enum { 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 */ 149 enum 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 */ 243 244 struct ibm_struct; 245 246 struct 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 }; 255 256 struct 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 }; 278 279 struct ibm_init_struct { 280 char param[32]; 281 282 int (*init) (struct ibm_init_struct *); 283 struct ibm_struct *data; 284 }; 285 286 static 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; 309 310 static struct { 311 u16 hotkey_mask_ff:1; 312 } tp_warned; 313 314 struct 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 }; 329 static struct thinkpad_id_data thinkpad_id; 330 331 static enum { 332 TPACPI_LIFE_INIT = 0, 333 TPACPI_LIFE_RUNNING, 334 TPACPI_LIFE_EXITING, 335 } tpacpi_lifecycle; 336 337 static int experimental; 338 static u32 dbg_level; 339 340 static struct workqueue_struct *tpacpi_wq; 341 342 enum 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 */ 349 struct 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 357 static int dbg_wlswemul; 358 static int tpacpi_wlsw_emulstate; 359 static int dbg_bluetoothemul; 360 static int tpacpi_bluetooth_emulstate; 361 static int dbg_wwanemul; 362 static int tpacpi_wwan_emulstate; 363 static int dbg_uwbemul; 364 static 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 379 static const char *str_supported(int is_supported); 380 #else 381 #define vdbg_printk(a_dbg_level, format, arg...) \ 382 do { } while (0) 383 #endif 384 385 static 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) } 427 428 struct 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 */ 448 static 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 */ 479 480 static 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 } 487 488 TPACPI_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 ); 496 497 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 498 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 499 500 TPACPI_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 */ 505 506 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 507 "^HKEY", /* R30, R31 */ 508 "HKEY", /* all others */ 509 ); /* 570 */ 510 511 TPACPI_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 */ 522 523 static 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 } 601 602 static 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 } 617 618 static 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 } 630 631 static 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) 649 650 static 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 } 675 676 static 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 } 688 689 static 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 } 731 732 static int __init tpacpi_device_add(struct acpi_device *device) 733 { 734 return 0; 735 } 736 737 static 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 ****************************************************************************/ 778 779 static 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 } 803 804 static 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 } 836 837 static 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 ****************************************************************************/ 861 862 static struct platform_device *tpacpi_pdev; 863 static struct platform_device *tpacpi_sensors_pdev; 864 static struct device *tpacpi_hwmon; 865 static struct input_dev *tpacpi_inputdev; 866 static struct mutex tpacpi_inputdev_send_mutex; 867 static LIST_HEAD(tpacpi_all_drivers); 868 869 static 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 } 883 884 static 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 } 897 898 static 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 } 909 910 static 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 }; 919 920 static 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 */ 930 931 struct attribute_set { 932 unsigned int members, max_members; 933 struct attribute_group group; 934 }; 935 936 struct attribute_set_obj { 937 struct attribute_set s; 938 struct attribute *a; 939 } __attribute__((packed)); 940 941 static 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 */ 966 static 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 } 979 980 static 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 } 994 995 static 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 1004 static 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 1020 static 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 1027 static 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 1050 static 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 */ 1069 static 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 1101 static 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 */ 1134 enum tpacpi_rfkill_state { 1135 TPACPI_RFK_RADIO_OFF = 0, 1136 TPACPI_RFK_RADIO_ON 1137 }; 1138 1139 /* rfkill switches */ 1140 enum 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 1147 static 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 */ 1155 struct tpacpi_rfk { 1156 struct rfkill *rfkill; 1157 enum tpacpi_rfk_id id; 1158 const struct tpacpi_rfk_ops *ops; 1159 }; 1160 1161 struct tpacpi_rfk_ops { 1162 /* firmware interface */ 1163 int (*get_status)(void); 1164 int (*set_status)(const enum tpacpi_rfkill_state); 1165 }; 1166 1167 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1168 1169 /* Query FW and update rfkill sw state for a given rfkill switch */ 1170 static 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 */ 1188 static 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 */ 1200 static 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 */ 1217 static int hotkey_get_wlsw(void); 1218 1219 /* Call to query WLSW state and update all rfkill switches */ 1220 static 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 1235 static 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 1254 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1255 .set_block = tpacpi_rfk_hook_set_block, 1256 }; 1257 1258 static 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 int sw_status; 1268 1269 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1270 1271 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1272 if (atp_rfk) 1273 atp_rfk->rfkill = rfkill_alloc(name, 1274 &tpacpi_pdev->dev, 1275 rfktype, 1276 &tpacpi_rfk_rfkill_ops, 1277 atp_rfk); 1278 if (!atp_rfk || !atp_rfk->rfkill) { 1279 printk(TPACPI_ERR 1280 "failed to allocate memory for rfkill class\n"); 1281 kfree(atp_rfk); 1282 return -ENOMEM; 1283 } 1284 1285 atp_rfk->id = id; 1286 atp_rfk->ops = tp_rfkops; 1287 1288 sw_status = (tp_rfkops->get_status)(); 1289 if (sw_status < 0) { 1290 printk(TPACPI_ERR 1291 "failed to read initial state for %s, error %d\n", 1292 name, sw_status); 1293 } else { 1294 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1295 if (set_default) { 1296 /* try to keep the initial state, since we ask the 1297 * firmware to preserve it across S5 in NVRAM */ 1298 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1299 } 1300 } 1301 rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state()); 1302 1303 res = rfkill_register(atp_rfk->rfkill); 1304 if (res < 0) { 1305 printk(TPACPI_ERR 1306 "failed to register %s rfkill switch: %d\n", 1307 name, res); 1308 rfkill_destroy(atp_rfk->rfkill); 1309 kfree(atp_rfk); 1310 return res; 1311 } 1312 1313 tpacpi_rfkill_switches[id] = atp_rfk; 1314 return 0; 1315 } 1316 1317 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1318 { 1319 struct tpacpi_rfk *tp_rfk; 1320 1321 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1322 1323 tp_rfk = tpacpi_rfkill_switches[id]; 1324 if (tp_rfk) { 1325 rfkill_unregister(tp_rfk->rfkill); 1326 rfkill_destroy(tp_rfk->rfkill); 1327 tpacpi_rfkill_switches[id] = NULL; 1328 kfree(tp_rfk); 1329 } 1330 } 1331 1332 static void printk_deprecated_rfkill_attribute(const char * const what) 1333 { 1334 printk_deprecated_attribute(what, 1335 "Please switch to generic rfkill before year 2010"); 1336 } 1337 1338 /* sysfs <radio> enable ------------------------------------------------ */ 1339 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1340 struct device_attribute *attr, 1341 char *buf) 1342 { 1343 int status; 1344 1345 printk_deprecated_rfkill_attribute(attr->attr.name); 1346 1347 /* This is in the ABI... */ 1348 if (tpacpi_rfk_check_hwblock_state()) { 1349 status = TPACPI_RFK_RADIO_OFF; 1350 } else { 1351 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1352 if (status < 0) 1353 return status; 1354 } 1355 1356 return snprintf(buf, PAGE_SIZE, "%d\n", 1357 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1358 } 1359 1360 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1361 struct device_attribute *attr, 1362 const char *buf, size_t count) 1363 { 1364 unsigned long t; 1365 int res; 1366 1367 printk_deprecated_rfkill_attribute(attr->attr.name); 1368 1369 if (parse_strtoul(buf, 1, &t)) 1370 return -EINVAL; 1371 1372 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1373 1374 /* This is in the ABI... */ 1375 if (tpacpi_rfk_check_hwblock_state() && !!t) 1376 return -EPERM; 1377 1378 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1379 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1380 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1381 1382 return (res < 0) ? res : count; 1383 } 1384 1385 /* procfs -------------------------------------------------------------- */ 1386 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p) 1387 { 1388 int len = 0; 1389 1390 if (id >= TPACPI_RFK_SW_MAX) 1391 len += sprintf(p + len, "status:\t\tnot supported\n"); 1392 else { 1393 int status; 1394 1395 /* This is in the ABI... */ 1396 if (tpacpi_rfk_check_hwblock_state()) { 1397 status = TPACPI_RFK_RADIO_OFF; 1398 } else { 1399 status = tpacpi_rfk_update_swstate( 1400 tpacpi_rfkill_switches[id]); 1401 if (status < 0) 1402 return status; 1403 } 1404 1405 len += sprintf(p + len, "status:\t\t%s\n", 1406 (status == TPACPI_RFK_RADIO_ON) ? 1407 "enabled" : "disabled"); 1408 len += sprintf(p + len, "commands:\tenable, disable\n"); 1409 } 1410 1411 return len; 1412 } 1413 1414 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1415 { 1416 char *cmd; 1417 int status = -1; 1418 int res = 0; 1419 1420 if (id >= TPACPI_RFK_SW_MAX) 1421 return -ENODEV; 1422 1423 while ((cmd = next_cmd(&buf))) { 1424 if (strlencmp(cmd, "enable") == 0) 1425 status = TPACPI_RFK_RADIO_ON; 1426 else if (strlencmp(cmd, "disable") == 0) 1427 status = TPACPI_RFK_RADIO_OFF; 1428 else 1429 return -EINVAL; 1430 } 1431 1432 if (status != -1) { 1433 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1434 (status == TPACPI_RFK_RADIO_ON) ? 1435 "enable" : "disable", 1436 tpacpi_rfkill_names[id]); 1437 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1438 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1439 } 1440 1441 return res; 1442 } 1443 1444 /************************************************************************* 1445 * thinkpad-acpi driver attributes 1446 */ 1447 1448 /* interface_version --------------------------------------------------- */ 1449 static ssize_t tpacpi_driver_interface_version_show( 1450 struct device_driver *drv, 1451 char *buf) 1452 { 1453 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1454 } 1455 1456 static DRIVER_ATTR(interface_version, S_IRUGO, 1457 tpacpi_driver_interface_version_show, NULL); 1458 1459 /* debug_level --------------------------------------------------------- */ 1460 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1461 char *buf) 1462 { 1463 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1464 } 1465 1466 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1467 const char *buf, size_t count) 1468 { 1469 unsigned long t; 1470 1471 if (parse_strtoul(buf, 0xffff, &t)) 1472 return -EINVAL; 1473 1474 dbg_level = t; 1475 1476 return count; 1477 } 1478 1479 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1480 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1481 1482 /* version ------------------------------------------------------------- */ 1483 static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1484 char *buf) 1485 { 1486 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1487 TPACPI_DESC, TPACPI_VERSION); 1488 } 1489 1490 static DRIVER_ATTR(version, S_IRUGO, 1491 tpacpi_driver_version_show, NULL); 1492 1493 /* --------------------------------------------------------------------- */ 1494 1495 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1496 1497 /* wlsw_emulstate ------------------------------------------------------ */ 1498 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1499 char *buf) 1500 { 1501 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1502 } 1503 1504 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1505 const char *buf, size_t count) 1506 { 1507 unsigned long t; 1508 1509 if (parse_strtoul(buf, 1, &t)) 1510 return -EINVAL; 1511 1512 if (tpacpi_wlsw_emulstate != !!t) { 1513 tpacpi_wlsw_emulstate = !!t; 1514 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1515 } 1516 1517 return count; 1518 } 1519 1520 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1521 tpacpi_driver_wlsw_emulstate_show, 1522 tpacpi_driver_wlsw_emulstate_store); 1523 1524 /* bluetooth_emulstate ------------------------------------------------- */ 1525 static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1526 struct device_driver *drv, 1527 char *buf) 1528 { 1529 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1530 } 1531 1532 static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1533 struct device_driver *drv, 1534 const char *buf, size_t count) 1535 { 1536 unsigned long t; 1537 1538 if (parse_strtoul(buf, 1, &t)) 1539 return -EINVAL; 1540 1541 tpacpi_bluetooth_emulstate = !!t; 1542 1543 return count; 1544 } 1545 1546 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1547 tpacpi_driver_bluetooth_emulstate_show, 1548 tpacpi_driver_bluetooth_emulstate_store); 1549 1550 /* wwan_emulstate ------------------------------------------------- */ 1551 static ssize_t tpacpi_driver_wwan_emulstate_show( 1552 struct device_driver *drv, 1553 char *buf) 1554 { 1555 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1556 } 1557 1558 static ssize_t tpacpi_driver_wwan_emulstate_store( 1559 struct device_driver *drv, 1560 const char *buf, size_t count) 1561 { 1562 unsigned long t; 1563 1564 if (parse_strtoul(buf, 1, &t)) 1565 return -EINVAL; 1566 1567 tpacpi_wwan_emulstate = !!t; 1568 1569 return count; 1570 } 1571 1572 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1573 tpacpi_driver_wwan_emulstate_show, 1574 tpacpi_driver_wwan_emulstate_store); 1575 1576 /* uwb_emulstate ------------------------------------------------- */ 1577 static ssize_t tpacpi_driver_uwb_emulstate_show( 1578 struct device_driver *drv, 1579 char *buf) 1580 { 1581 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1582 } 1583 1584 static ssize_t tpacpi_driver_uwb_emulstate_store( 1585 struct device_driver *drv, 1586 const char *buf, size_t count) 1587 { 1588 unsigned long t; 1589 1590 if (parse_strtoul(buf, 1, &t)) 1591 return -EINVAL; 1592 1593 tpacpi_uwb_emulstate = !!t; 1594 1595 return count; 1596 } 1597 1598 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1599 tpacpi_driver_uwb_emulstate_show, 1600 tpacpi_driver_uwb_emulstate_store); 1601 #endif 1602 1603 /* --------------------------------------------------------------------- */ 1604 1605 static struct driver_attribute *tpacpi_driver_attributes[] = { 1606 &driver_attr_debug_level, &driver_attr_version, 1607 &driver_attr_interface_version, 1608 }; 1609 1610 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1611 { 1612 int i, res; 1613 1614 i = 0; 1615 res = 0; 1616 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1617 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1618 i++; 1619 } 1620 1621 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1622 if (!res && dbg_wlswemul) 1623 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1624 if (!res && dbg_bluetoothemul) 1625 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1626 if (!res && dbg_wwanemul) 1627 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1628 if (!res && dbg_uwbemul) 1629 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1630 #endif 1631 1632 return res; 1633 } 1634 1635 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1636 { 1637 int i; 1638 1639 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1640 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1641 1642 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1643 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1644 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1645 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1646 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1647 #endif 1648 } 1649 1650 /************************************************************************* 1651 * Firmware Data 1652 */ 1653 1654 /* 1655 * Table of recommended minimum BIOS versions 1656 * 1657 * Reasons for listing: 1658 * 1. Stable BIOS, listed because the unknown ammount of 1659 * bugs and bad ACPI behaviour on older versions 1660 * 1661 * 2. BIOS or EC fw with known bugs that trigger on Linux 1662 * 1663 * 3. BIOS with known reduced functionality in older versions 1664 * 1665 * We recommend the latest BIOS and EC version. 1666 * We only support the latest BIOS and EC fw version as a rule. 1667 * 1668 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1669 * Information from users in ThinkWiki 1670 * 1671 * WARNING: we use this table also to detect that the machine is 1672 * a ThinkPad in some cases, so don't remove entries lightly. 1673 */ 1674 1675 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1676 { .vendor = (__v), \ 1677 .bios = TPID(__id1, __id2), \ 1678 .ec = TPACPI_MATCH_ANY, \ 1679 .quirks = TPACPI_MATCH_ANY << 16 \ 1680 | (__bv1) << 8 | (__bv2) } 1681 1682 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1683 __eid1, __eid2, __ev1, __ev2) \ 1684 { .vendor = (__v), \ 1685 .bios = TPID(__bid1, __bid2), \ 1686 .ec = TPID(__eid1, __eid2), \ 1687 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1688 | (__bv1) << 8 | (__bv2) } 1689 1690 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1691 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1692 1693 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1694 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1695 __bv1, __bv2, __id1, __id2, __ev1, __ev2) 1696 1697 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1698 __eid1, __eid2, __ev1, __ev2) \ 1699 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1700 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2) 1701 1702 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1703 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1704 1705 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1706 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1707 __bv1, __bv2, __id1, __id2, __ev1, __ev2) 1708 1709 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1710 __eid1, __eid2, __ev1, __ev2) \ 1711 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1712 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2) 1713 1714 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1715 /* Numeric models ------------------ */ 1716 /* FW MODEL BIOS VERS */ 1717 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1718 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1719 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1720 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1721 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1722 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1723 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1724 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1725 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1726 1727 /* A-series ------------------------- */ 1728 /* FW MODEL BIOS VERS EC VERS */ 1729 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1730 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1731 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1732 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1733 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1734 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1735 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1736 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1737 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1738 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1739 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1740 1741 /* G-series ------------------------- */ 1742 /* FW MODEL BIOS VERS */ 1743 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1744 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1745 1746 /* R-series, T-series --------------- */ 1747 /* FW MODEL BIOS VERS EC VERS */ 1748 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1749 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1750 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1751 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1752 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1753 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1754 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1755 T40/p, T41/p, T42/p (1) */ 1756 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1757 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1758 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1759 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1760 1761 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1762 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1763 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1764 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1765 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1766 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1767 1768 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1769 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1770 TPV_QL0('7', 'E', 'D', '0'), /* R60e, R60i */ 1771 1772 /* BIOS FW BIOS VERS EC FW EC VERS */ 1773 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1774 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1775 1776 /* X-series ------------------------- */ 1777 /* FW MODEL BIOS VERS EC VERS */ 1778 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1779 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1780 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1781 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1782 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1783 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1784 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1785 1786 TPV_QL0('7', 'B', 'D', '7'), /* X60/s */ 1787 TPV_QL0('7', 'J', '3', '0'), /* X60t */ 1788 1789 /* (0) - older versions lack DMI EC fw string and functionality */ 1790 /* (1) - older versions known to lack functionality */ 1791 }; 1792 1793 #undef TPV_QL1 1794 #undef TPV_QL0 1795 #undef TPV_QI2 1796 #undef TPV_QI1 1797 #undef TPV_QI0 1798 #undef TPV_Q_X 1799 #undef TPV_Q 1800 1801 static void __init tpacpi_check_outdated_fw(void) 1802 { 1803 unsigned long fwvers; 1804 u16 ec_version, bios_version; 1805 1806 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1807 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1808 1809 if (!fwvers) 1810 return; 1811 1812 bios_version = fwvers & 0xffffU; 1813 ec_version = (fwvers >> 16) & 0xffffU; 1814 1815 /* note that unknown versions are set to 0x0000 and we use that */ 1816 if ((bios_version > thinkpad_id.bios_release) || 1817 (ec_version > thinkpad_id.ec_release && 1818 ec_version != TPACPI_MATCH_ANY)) { 1819 /* 1820 * The changelogs would let us track down the exact 1821 * reason, but it is just too much of a pain to track 1822 * it. We only list BIOSes that are either really 1823 * broken, or really stable to begin with, so it is 1824 * best if the user upgrades the firmware anyway. 1825 */ 1826 printk(TPACPI_WARN 1827 "WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1828 printk(TPACPI_WARN 1829 "WARNING: This firmware may be missing critical bug " 1830 "fixes and/or important features\n"); 1831 } 1832 } 1833 1834 static bool __init tpacpi_is_fw_known(void) 1835 { 1836 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1837 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1838 } 1839 1840 /**************************************************************************** 1841 **************************************************************************** 1842 * 1843 * Subdrivers 1844 * 1845 **************************************************************************** 1846 ****************************************************************************/ 1847 1848 /************************************************************************* 1849 * thinkpad-acpi init subdriver 1850 */ 1851 1852 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm) 1853 { 1854 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 1855 printk(TPACPI_INFO "%s\n", TPACPI_URL); 1856 1857 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n", 1858 (thinkpad_id.bios_version_str) ? 1859 thinkpad_id.bios_version_str : "unknown", 1860 (thinkpad_id.ec_version_str) ? 1861 thinkpad_id.ec_version_str : "unknown"); 1862 1863 if (thinkpad_id.vendor && thinkpad_id.model_str) 1864 printk(TPACPI_INFO "%s %s, model %s\n", 1865 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 1866 "IBM" : ((thinkpad_id.vendor == 1867 PCI_VENDOR_ID_LENOVO) ? 1868 "Lenovo" : "Unknown vendor"), 1869 thinkpad_id.model_str, 1870 (thinkpad_id.nummodel_str) ? 1871 thinkpad_id.nummodel_str : "unknown"); 1872 1873 tpacpi_check_outdated_fw(); 1874 return 0; 1875 } 1876 1877 static int thinkpad_acpi_driver_read(char *p) 1878 { 1879 int len = 0; 1880 1881 len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC); 1882 len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION); 1883 1884 return len; 1885 } 1886 1887 static struct ibm_struct thinkpad_acpi_driver_data = { 1888 .name = "driver", 1889 .read = thinkpad_acpi_driver_read, 1890 }; 1891 1892 /************************************************************************* 1893 * Hotkey subdriver 1894 */ 1895 1896 /* 1897 * ThinkPad firmware event model 1898 * 1899 * The ThinkPad firmware has two main event interfaces: normal ACPI 1900 * notifications (which follow the ACPI standard), and a private event 1901 * interface. 1902 * 1903 * The private event interface also issues events for the hotkeys. As 1904 * the driver gained features, the event handling code ended up being 1905 * built around the hotkey subdriver. This will need to be refactored 1906 * to a more formal event API eventually. 1907 * 1908 * Some "hotkeys" are actually supposed to be used as event reports, 1909 * such as "brightness has changed", "volume has changed", depending on 1910 * the ThinkPad model and how the firmware is operating. 1911 * 1912 * Unlike other classes, hotkey-class events have mask/unmask control on 1913 * non-ancient firmware. However, how it behaves changes a lot with the 1914 * firmware model and version. 1915 */ 1916 1917 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1918 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1919 TP_ACPI_HOTKEYSCAN_FNF2, 1920 TP_ACPI_HOTKEYSCAN_FNF3, 1921 TP_ACPI_HOTKEYSCAN_FNF4, 1922 TP_ACPI_HOTKEYSCAN_FNF5, 1923 TP_ACPI_HOTKEYSCAN_FNF6, 1924 TP_ACPI_HOTKEYSCAN_FNF7, 1925 TP_ACPI_HOTKEYSCAN_FNF8, 1926 TP_ACPI_HOTKEYSCAN_FNF9, 1927 TP_ACPI_HOTKEYSCAN_FNF10, 1928 TP_ACPI_HOTKEYSCAN_FNF11, 1929 TP_ACPI_HOTKEYSCAN_FNF12, 1930 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1931 TP_ACPI_HOTKEYSCAN_FNINSERT, 1932 TP_ACPI_HOTKEYSCAN_FNDELETE, 1933 TP_ACPI_HOTKEYSCAN_FNHOME, 1934 TP_ACPI_HOTKEYSCAN_FNEND, 1935 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1936 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1937 TP_ACPI_HOTKEYSCAN_FNSPACE, 1938 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1939 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1940 TP_ACPI_HOTKEYSCAN_MUTE, 1941 TP_ACPI_HOTKEYSCAN_THINKPAD, 1942 }; 1943 1944 enum { /* Keys/events available through NVRAM polling */ 1945 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1946 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1947 }; 1948 1949 enum { /* Positions of some of the keys in hotkey masks */ 1950 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1951 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1952 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1953 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1954 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1955 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1956 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1957 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1958 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1959 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1960 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1961 }; 1962 1963 enum { /* NVRAM to ACPI HKEY group map */ 1964 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1965 TP_ACPI_HKEY_ZOOM_MASK | 1966 TP_ACPI_HKEY_DISPSWTCH_MASK | 1967 TP_ACPI_HKEY_HIBERNATE_MASK, 1968 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1969 TP_ACPI_HKEY_BRGHTDWN_MASK, 1970 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1971 TP_ACPI_HKEY_VOLDWN_MASK | 1972 TP_ACPI_HKEY_MUTE_MASK, 1973 }; 1974 1975 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1976 struct tp_nvram_state { 1977 u16 thinkpad_toggle:1; 1978 u16 zoom_toggle:1; 1979 u16 display_toggle:1; 1980 u16 thinklight_toggle:1; 1981 u16 hibernate_toggle:1; 1982 u16 displayexp_toggle:1; 1983 u16 display_state:1; 1984 u16 brightness_toggle:1; 1985 u16 volume_toggle:1; 1986 u16 mute:1; 1987 1988 u8 brightness_level; 1989 u8 volume_level; 1990 }; 1991 1992 /* kthread for the hotkey poller */ 1993 static struct task_struct *tpacpi_hotkey_task; 1994 1995 /* Acquired while the poller kthread is running, use to sync start/stop */ 1996 static struct mutex hotkey_thread_mutex; 1997 1998 /* 1999 * Acquire mutex to write poller control variables as an 2000 * atomic block. 2001 * 2002 * Increment hotkey_config_change when changing them if you 2003 * want the kthread to forget old state. 2004 * 2005 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2006 */ 2007 static struct mutex hotkey_thread_data_mutex; 2008 static unsigned int hotkey_config_change; 2009 2010 /* 2011 * hotkey poller control variables 2012 * 2013 * Must be atomic or readers will also need to acquire mutex 2014 * 2015 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2016 * should be used only when the changes need to be taken as 2017 * a block, OR when one needs to force the kthread to forget 2018 * old state. 2019 */ 2020 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2021 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2022 2023 #define HOTKEY_CONFIG_CRITICAL_START \ 2024 do { \ 2025 mutex_lock(&hotkey_thread_data_mutex); \ 2026 hotkey_config_change++; \ 2027 } while (0); 2028 #define HOTKEY_CONFIG_CRITICAL_END \ 2029 mutex_unlock(&hotkey_thread_data_mutex); 2030 2031 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2032 2033 #define hotkey_source_mask 0U 2034 #define HOTKEY_CONFIG_CRITICAL_START 2035 #define HOTKEY_CONFIG_CRITICAL_END 2036 2037 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2038 2039 static struct mutex hotkey_mutex; 2040 2041 static enum { /* Reasons for waking up */ 2042 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2043 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2044 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2045 } hotkey_wakeup_reason; 2046 2047 static int hotkey_autosleep_ack; 2048 2049 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2050 static u32 hotkey_all_mask; /* all events supported in fw */ 2051 static u32 hotkey_reserved_mask; /* events better left disabled */ 2052 static u32 hotkey_driver_mask; /* events needed by the driver */ 2053 static u32 hotkey_user_mask; /* events visible to userspace */ 2054 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2055 2056 static unsigned int hotkey_report_mode; 2057 2058 static u16 *hotkey_keycode_map; 2059 2060 static struct attribute_set *hotkey_dev_attributes; 2061 2062 static void tpacpi_driver_event(const unsigned int hkey_event); 2063 static void hotkey_driver_event(const unsigned int scancode); 2064 2065 /* HKEY.MHKG() return bits */ 2066 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2067 2068 static int hotkey_get_wlsw(void) 2069 { 2070 int status; 2071 2072 if (!tp_features.hotkey_wlsw) 2073 return -ENODEV; 2074 2075 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2076 if (dbg_wlswemul) 2077 return (tpacpi_wlsw_emulstate) ? 2078 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2079 #endif 2080 2081 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2082 return -EIO; 2083 2084 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2085 } 2086 2087 static int hotkey_get_tablet_mode(int *status) 2088 { 2089 int s; 2090 2091 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2092 return -EIO; 2093 2094 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2095 return 0; 2096 } 2097 2098 /* 2099 * Reads current event mask from firmware, and updates 2100 * hotkey_acpi_mask accordingly. Also resets any bits 2101 * from hotkey_user_mask that are unavailable to be 2102 * delivered (shadow requirement of the userspace ABI). 2103 * 2104 * Call with hotkey_mutex held 2105 */ 2106 static int hotkey_mask_get(void) 2107 { 2108 if (tp_features.hotkey_mask) { 2109 u32 m = 0; 2110 2111 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2112 return -EIO; 2113 2114 hotkey_acpi_mask = m; 2115 } else { 2116 /* no mask support doesn't mean no event support... */ 2117 hotkey_acpi_mask = hotkey_all_mask; 2118 } 2119 2120 /* sync userspace-visible mask */ 2121 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2122 2123 return 0; 2124 } 2125 2126 void static hotkey_mask_warn_incomplete_mask(void) 2127 { 2128 /* log only what the user can fix... */ 2129 const u32 wantedmask = hotkey_driver_mask & 2130 ~(hotkey_acpi_mask | hotkey_source_mask) & 2131 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2132 2133 if (wantedmask) 2134 printk(TPACPI_NOTICE 2135 "required events 0x%08x not enabled!\n", 2136 wantedmask); 2137 } 2138 2139 /* 2140 * Set the firmware mask when supported 2141 * 2142 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2143 * 2144 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2145 * 2146 * Call with hotkey_mutex held 2147 */ 2148 static int hotkey_mask_set(u32 mask) 2149 { 2150 int i; 2151 int rc = 0; 2152 2153 const u32 fwmask = mask & ~hotkey_source_mask; 2154 2155 if (tp_features.hotkey_mask) { 2156 for (i = 0; i < 32; i++) { 2157 if (!acpi_evalf(hkey_handle, 2158 NULL, "MHKM", "vdd", i + 1, 2159 !!(mask & (1 << i)))) { 2160 rc = -EIO; 2161 break; 2162 } 2163 } 2164 } 2165 2166 /* 2167 * We *must* make an inconditional call to hotkey_mask_get to 2168 * refresh hotkey_acpi_mask and update hotkey_user_mask 2169 * 2170 * Take the opportunity to also log when we cannot _enable_ 2171 * a given event. 2172 */ 2173 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2174 printk(TPACPI_NOTICE 2175 "asked for hotkey mask 0x%08x, but " 2176 "firmware forced it to 0x%08x\n", 2177 fwmask, hotkey_acpi_mask); 2178 } 2179 2180 hotkey_mask_warn_incomplete_mask(); 2181 2182 return rc; 2183 } 2184 2185 /* 2186 * Sets hotkey_user_mask and tries to set the firmware mask 2187 * 2188 * Call with hotkey_mutex held 2189 */ 2190 static int hotkey_user_mask_set(const u32 mask) 2191 { 2192 int rc; 2193 2194 /* Give people a chance to notice they are doing something that 2195 * is bound to go boom on their users sooner or later */ 2196 if (!tp_warned.hotkey_mask_ff && 2197 (mask == 0xffff || mask == 0xffffff || 2198 mask == 0xffffffff)) { 2199 tp_warned.hotkey_mask_ff = 1; 2200 printk(TPACPI_NOTICE 2201 "setting the hotkey mask to 0x%08x is likely " 2202 "not the best way to go about it\n", mask); 2203 printk(TPACPI_NOTICE 2204 "please consider using the driver defaults, " 2205 "and refer to up-to-date thinkpad-acpi " 2206 "documentation\n"); 2207 } 2208 2209 /* Try to enable what the user asked for, plus whatever we need. 2210 * this syncs everything but won't enable bits in hotkey_user_mask */ 2211 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2212 2213 /* Enable the available bits in hotkey_user_mask */ 2214 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2215 2216 return rc; 2217 } 2218 2219 /* 2220 * Sets the driver hotkey mask. 2221 * 2222 * Can be called even if the hotkey subdriver is inactive 2223 */ 2224 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2225 { 2226 int rc; 2227 2228 /* Do the right thing if hotkey_init has not been called yet */ 2229 if (!tp_features.hotkey) { 2230 hotkey_driver_mask = mask; 2231 return 0; 2232 } 2233 2234 mutex_lock(&hotkey_mutex); 2235 2236 HOTKEY_CONFIG_CRITICAL_START 2237 hotkey_driver_mask = mask; 2238 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2239 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2240 #endif 2241 HOTKEY_CONFIG_CRITICAL_END 2242 2243 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2244 ~hotkey_source_mask); 2245 mutex_unlock(&hotkey_mutex); 2246 2247 return rc; 2248 } 2249 2250 static int hotkey_status_get(int *status) 2251 { 2252 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2253 return -EIO; 2254 2255 return 0; 2256 } 2257 2258 static int hotkey_status_set(bool enable) 2259 { 2260 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2261 return -EIO; 2262 2263 return 0; 2264 } 2265 2266 static void tpacpi_input_send_tabletsw(void) 2267 { 2268 int state; 2269 2270 if (tp_features.hotkey_tablet && 2271 !hotkey_get_tablet_mode(&state)) { 2272 mutex_lock(&tpacpi_inputdev_send_mutex); 2273 2274 input_report_switch(tpacpi_inputdev, 2275 SW_TABLET_MODE, !!state); 2276 input_sync(tpacpi_inputdev); 2277 2278 mutex_unlock(&tpacpi_inputdev_send_mutex); 2279 } 2280 } 2281 2282 /* Do NOT call without validating scancode first */ 2283 static void tpacpi_input_send_key(const unsigned int scancode) 2284 { 2285 const unsigned int keycode = hotkey_keycode_map[scancode]; 2286 2287 if (keycode != KEY_RESERVED) { 2288 mutex_lock(&tpacpi_inputdev_send_mutex); 2289 2290 input_report_key(tpacpi_inputdev, keycode, 1); 2291 if (keycode == KEY_UNKNOWN) 2292 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, 2293 scancode); 2294 input_sync(tpacpi_inputdev); 2295 2296 input_report_key(tpacpi_inputdev, keycode, 0); 2297 if (keycode == KEY_UNKNOWN) 2298 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, 2299 scancode); 2300 input_sync(tpacpi_inputdev); 2301 2302 mutex_unlock(&tpacpi_inputdev_send_mutex); 2303 } 2304 } 2305 2306 /* Do NOT call without validating scancode first */ 2307 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2308 { 2309 hotkey_driver_event(scancode); 2310 if (hotkey_user_mask & (1 << scancode)) 2311 tpacpi_input_send_key(scancode); 2312 } 2313 2314 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2315 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2316 2317 /* Do NOT call without validating scancode first */ 2318 static void tpacpi_hotkey_send_key(unsigned int scancode) 2319 { 2320 tpacpi_input_send_key_masked(scancode); 2321 if (hotkey_report_mode < 2) { 2322 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device, 2323 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode); 2324 } 2325 } 2326 2327 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2328 { 2329 u8 d; 2330 2331 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2332 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2333 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2334 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2335 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2336 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2337 } 2338 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2339 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2340 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2341 } 2342 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2343 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2344 n->displayexp_toggle = 2345 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2346 } 2347 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2348 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2349 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2350 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2351 n->brightness_toggle = 2352 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2353 } 2354 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2355 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2356 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2357 >> TP_NVRAM_POS_LEVEL_VOLUME; 2358 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2359 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2360 } 2361 } 2362 2363 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2364 struct tp_nvram_state *newn, 2365 const u32 event_mask) 2366 { 2367 2368 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2369 do { \ 2370 if ((event_mask & (1 << __scancode)) && \ 2371 oldn->__member != newn->__member) \ 2372 tpacpi_hotkey_send_key(__scancode); \ 2373 } while (0) 2374 2375 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2376 do { \ 2377 if (event_mask & (1 << __scancode)) \ 2378 tpacpi_hotkey_send_key(__scancode); \ 2379 } while (0) 2380 2381 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2382 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2383 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2384 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2385 2386 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2387 2388 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2389 2390 /* handle volume */ 2391 if (oldn->volume_toggle != newn->volume_toggle) { 2392 if (oldn->mute != newn->mute) { 2393 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2394 } 2395 if (oldn->volume_level > newn->volume_level) { 2396 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2397 } else if (oldn->volume_level < newn->volume_level) { 2398 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2399 } else if (oldn->mute == newn->mute) { 2400 /* repeated key presses that didn't change state */ 2401 if (newn->mute) { 2402 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2403 } else if (newn->volume_level != 0) { 2404 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2405 } else { 2406 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2407 } 2408 } 2409 } 2410 2411 /* handle brightness */ 2412 if (oldn->brightness_toggle != newn->brightness_toggle) { 2413 if (oldn->brightness_level < newn->brightness_level) { 2414 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2415 } else if (oldn->brightness_level > newn->brightness_level) { 2416 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2417 } else { 2418 /* repeated key presses that didn't change state */ 2419 if (newn->brightness_level != 0) { 2420 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2421 } else { 2422 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2423 } 2424 } 2425 } 2426 2427 #undef TPACPI_COMPARE_KEY 2428 #undef TPACPI_MAY_SEND_KEY 2429 } 2430 2431 /* 2432 * Polling driver 2433 * 2434 * We track all events in hotkey_source_mask all the time, since 2435 * most of them are edge-based. We only issue those requested by 2436 * hotkey_user_mask or hotkey_driver_mask, though. 2437 */ 2438 static int hotkey_kthread(void *data) 2439 { 2440 struct tp_nvram_state s[2]; 2441 u32 poll_mask, event_mask; 2442 unsigned int si, so; 2443 unsigned long t; 2444 unsigned int change_detector, must_reset; 2445 unsigned int poll_freq; 2446 2447 mutex_lock(&hotkey_thread_mutex); 2448 2449 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2450 goto exit; 2451 2452 set_freezable(); 2453 2454 so = 0; 2455 si = 1; 2456 t = 0; 2457 2458 /* Initial state for compares */ 2459 mutex_lock(&hotkey_thread_data_mutex); 2460 change_detector = hotkey_config_change; 2461 poll_mask = hotkey_source_mask; 2462 event_mask = hotkey_source_mask & 2463 (hotkey_driver_mask | hotkey_user_mask); 2464 poll_freq = hotkey_poll_freq; 2465 mutex_unlock(&hotkey_thread_data_mutex); 2466 hotkey_read_nvram(&s[so], poll_mask); 2467 2468 while (!kthread_should_stop()) { 2469 if (t == 0) { 2470 if (likely(poll_freq)) 2471 t = 1000/poll_freq; 2472 else 2473 t = 100; /* should never happen... */ 2474 } 2475 t = msleep_interruptible(t); 2476 if (unlikely(kthread_should_stop())) 2477 break; 2478 must_reset = try_to_freeze(); 2479 if (t > 0 && !must_reset) 2480 continue; 2481 2482 mutex_lock(&hotkey_thread_data_mutex); 2483 if (must_reset || hotkey_config_change != change_detector) { 2484 /* forget old state on thaw or config change */ 2485 si = so; 2486 t = 0; 2487 change_detector = hotkey_config_change; 2488 } 2489 poll_mask = hotkey_source_mask; 2490 event_mask = hotkey_source_mask & 2491 (hotkey_driver_mask | hotkey_user_mask); 2492 poll_freq = hotkey_poll_freq; 2493 mutex_unlock(&hotkey_thread_data_mutex); 2494 2495 if (likely(poll_mask)) { 2496 hotkey_read_nvram(&s[si], poll_mask); 2497 if (likely(si != so)) { 2498 hotkey_compare_and_issue_event(&s[so], &s[si], 2499 event_mask); 2500 } 2501 } 2502 2503 so = si; 2504 si ^= 1; 2505 } 2506 2507 exit: 2508 mutex_unlock(&hotkey_thread_mutex); 2509 return 0; 2510 } 2511 2512 /* call with hotkey_mutex held */ 2513 static void hotkey_poll_stop_sync(void) 2514 { 2515 if (tpacpi_hotkey_task) { 2516 if (frozen(tpacpi_hotkey_task) || 2517 freezing(tpacpi_hotkey_task)) 2518 thaw_process(tpacpi_hotkey_task); 2519 2520 kthread_stop(tpacpi_hotkey_task); 2521 tpacpi_hotkey_task = NULL; 2522 mutex_lock(&hotkey_thread_mutex); 2523 /* at this point, the thread did exit */ 2524 mutex_unlock(&hotkey_thread_mutex); 2525 } 2526 } 2527 2528 /* call with hotkey_mutex held */ 2529 static void hotkey_poll_setup(bool may_warn) 2530 { 2531 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2532 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2533 2534 if (hotkey_poll_freq > 0 && 2535 (poll_driver_mask || 2536 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2537 if (!tpacpi_hotkey_task) { 2538 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2539 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2540 if (IS_ERR(tpacpi_hotkey_task)) { 2541 tpacpi_hotkey_task = NULL; 2542 printk(TPACPI_ERR 2543 "could not create kernel thread " 2544 "for hotkey polling\n"); 2545 } 2546 } 2547 } else { 2548 hotkey_poll_stop_sync(); 2549 if (may_warn && (poll_driver_mask || poll_user_mask) && 2550 hotkey_poll_freq == 0) { 2551 printk(TPACPI_NOTICE 2552 "hot keys 0x%08x and/or events 0x%08x " 2553 "require polling, which is currently " 2554 "disabled\n", 2555 poll_user_mask, poll_driver_mask); 2556 } 2557 } 2558 } 2559 2560 static void hotkey_poll_setup_safe(bool may_warn) 2561 { 2562 mutex_lock(&hotkey_mutex); 2563 hotkey_poll_setup(may_warn); 2564 mutex_unlock(&hotkey_mutex); 2565 } 2566 2567 /* call with hotkey_mutex held */ 2568 static void hotkey_poll_set_freq(unsigned int freq) 2569 { 2570 if (!freq) 2571 hotkey_poll_stop_sync(); 2572 2573 hotkey_poll_freq = freq; 2574 } 2575 2576 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2577 2578 static void hotkey_poll_setup_safe(bool __unused) 2579 { 2580 } 2581 2582 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2583 2584 static int hotkey_inputdev_open(struct input_dev *dev) 2585 { 2586 switch (tpacpi_lifecycle) { 2587 case TPACPI_LIFE_INIT: 2588 /* 2589 * hotkey_init will call hotkey_poll_setup_safe 2590 * at the appropriate moment 2591 */ 2592 return 0; 2593 case TPACPI_LIFE_EXITING: 2594 return -EBUSY; 2595 case TPACPI_LIFE_RUNNING: 2596 hotkey_poll_setup_safe(false); 2597 return 0; 2598 } 2599 2600 /* Should only happen if tpacpi_lifecycle is corrupt */ 2601 BUG(); 2602 return -EBUSY; 2603 } 2604 2605 static void hotkey_inputdev_close(struct input_dev *dev) 2606 { 2607 /* disable hotkey polling when possible */ 2608 if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING && 2609 !(hotkey_source_mask & hotkey_driver_mask)) 2610 hotkey_poll_setup_safe(false); 2611 } 2612 2613 /* sysfs hotkey enable ------------------------------------------------- */ 2614 static ssize_t hotkey_enable_show(struct device *dev, 2615 struct device_attribute *attr, 2616 char *buf) 2617 { 2618 int res, status; 2619 2620 printk_deprecated_attribute("hotkey_enable", 2621 "Hotkey reporting is always enabled"); 2622 2623 res = hotkey_status_get(&status); 2624 if (res) 2625 return res; 2626 2627 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2628 } 2629 2630 static ssize_t hotkey_enable_store(struct device *dev, 2631 struct device_attribute *attr, 2632 const char *buf, size_t count) 2633 { 2634 unsigned long t; 2635 2636 printk_deprecated_attribute("hotkey_enable", 2637 "Hotkeys can be disabled through hotkey_mask"); 2638 2639 if (parse_strtoul(buf, 1, &t)) 2640 return -EINVAL; 2641 2642 if (t == 0) 2643 return -EPERM; 2644 2645 return count; 2646 } 2647 2648 static struct device_attribute dev_attr_hotkey_enable = 2649 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO, 2650 hotkey_enable_show, hotkey_enable_store); 2651 2652 /* sysfs hotkey mask --------------------------------------------------- */ 2653 static ssize_t hotkey_mask_show(struct device *dev, 2654 struct device_attribute *attr, 2655 char *buf) 2656 { 2657 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2658 } 2659 2660 static ssize_t hotkey_mask_store(struct device *dev, 2661 struct device_attribute *attr, 2662 const char *buf, size_t count) 2663 { 2664 unsigned long t; 2665 int res; 2666 2667 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2668 return -EINVAL; 2669 2670 if (mutex_lock_killable(&hotkey_mutex)) 2671 return -ERESTARTSYS; 2672 2673 res = hotkey_user_mask_set(t); 2674 2675 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2676 hotkey_poll_setup(true); 2677 #endif 2678 2679 mutex_unlock(&hotkey_mutex); 2680 2681 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2682 2683 return (res) ? res : count; 2684 } 2685 2686 static struct device_attribute dev_attr_hotkey_mask = 2687 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO, 2688 hotkey_mask_show, hotkey_mask_store); 2689 2690 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2691 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2692 struct device_attribute *attr, 2693 char *buf) 2694 { 2695 return sprintf(buf, "0\n"); 2696 } 2697 2698 static struct device_attribute dev_attr_hotkey_bios_enabled = 2699 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL); 2700 2701 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2702 static ssize_t hotkey_bios_mask_show(struct device *dev, 2703 struct device_attribute *attr, 2704 char *buf) 2705 { 2706 printk_deprecated_attribute("hotkey_bios_mask", 2707 "This attribute is useless."); 2708 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2709 } 2710 2711 static struct device_attribute dev_attr_hotkey_bios_mask = 2712 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL); 2713 2714 /* sysfs hotkey all_mask ----------------------------------------------- */ 2715 static ssize_t hotkey_all_mask_show(struct device *dev, 2716 struct device_attribute *attr, 2717 char *buf) 2718 { 2719 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2720 hotkey_all_mask | hotkey_source_mask); 2721 } 2722 2723 static struct device_attribute dev_attr_hotkey_all_mask = 2724 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL); 2725 2726 /* sysfs hotkey recommended_mask --------------------------------------- */ 2727 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2728 struct device_attribute *attr, 2729 char *buf) 2730 { 2731 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2732 (hotkey_all_mask | hotkey_source_mask) 2733 & ~hotkey_reserved_mask); 2734 } 2735 2736 static struct device_attribute dev_attr_hotkey_recommended_mask = 2737 __ATTR(hotkey_recommended_mask, S_IRUGO, 2738 hotkey_recommended_mask_show, NULL); 2739 2740 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2741 2742 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2743 static ssize_t hotkey_source_mask_show(struct device *dev, 2744 struct device_attribute *attr, 2745 char *buf) 2746 { 2747 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2748 } 2749 2750 static ssize_t hotkey_source_mask_store(struct device *dev, 2751 struct device_attribute *attr, 2752 const char *buf, size_t count) 2753 { 2754 unsigned long t; 2755 u32 r_ev; 2756 int rc; 2757 2758 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2759 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2760 return -EINVAL; 2761 2762 if (mutex_lock_killable(&hotkey_mutex)) 2763 return -ERESTARTSYS; 2764 2765 HOTKEY_CONFIG_CRITICAL_START 2766 hotkey_source_mask = t; 2767 HOTKEY_CONFIG_CRITICAL_END 2768 2769 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2770 ~hotkey_source_mask); 2771 hotkey_poll_setup(true); 2772 2773 /* check if events needed by the driver got disabled */ 2774 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2775 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2776 2777 mutex_unlock(&hotkey_mutex); 2778 2779 if (rc < 0) 2780 printk(TPACPI_ERR "hotkey_source_mask: failed to update the" 2781 "firmware event mask!\n"); 2782 2783 if (r_ev) 2784 printk(TPACPI_NOTICE "hotkey_source_mask: " 2785 "some important events were disabled: " 2786 "0x%04x\n", r_ev); 2787 2788 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2789 2790 return (rc < 0) ? rc : count; 2791 } 2792 2793 static struct device_attribute dev_attr_hotkey_source_mask = 2794 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO, 2795 hotkey_source_mask_show, hotkey_source_mask_store); 2796 2797 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2798 static ssize_t hotkey_poll_freq_show(struct device *dev, 2799 struct device_attribute *attr, 2800 char *buf) 2801 { 2802 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2803 } 2804 2805 static ssize_t hotkey_poll_freq_store(struct device *dev, 2806 struct device_attribute *attr, 2807 const char *buf, size_t count) 2808 { 2809 unsigned long t; 2810 2811 if (parse_strtoul(buf, 25, &t)) 2812 return -EINVAL; 2813 2814 if (mutex_lock_killable(&hotkey_mutex)) 2815 return -ERESTARTSYS; 2816 2817 hotkey_poll_set_freq(t); 2818 hotkey_poll_setup(true); 2819 2820 mutex_unlock(&hotkey_mutex); 2821 2822 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2823 2824 return count; 2825 } 2826 2827 static struct device_attribute dev_attr_hotkey_poll_freq = 2828 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO, 2829 hotkey_poll_freq_show, hotkey_poll_freq_store); 2830 2831 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2832 2833 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2834 static ssize_t hotkey_radio_sw_show(struct device *dev, 2835 struct device_attribute *attr, 2836 char *buf) 2837 { 2838 int res; 2839 res = hotkey_get_wlsw(); 2840 if (res < 0) 2841 return res; 2842 2843 /* Opportunistic update */ 2844 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2845 2846 return snprintf(buf, PAGE_SIZE, "%d\n", 2847 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2848 } 2849 2850 static struct device_attribute dev_attr_hotkey_radio_sw = 2851 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL); 2852 2853 static void hotkey_radio_sw_notify_change(void) 2854 { 2855 if (tp_features.hotkey_wlsw) 2856 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2857 "hotkey_radio_sw"); 2858 } 2859 2860 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2861 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2862 struct device_attribute *attr, 2863 char *buf) 2864 { 2865 int res, s; 2866 res = hotkey_get_tablet_mode(&s); 2867 if (res < 0) 2868 return res; 2869 2870 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2871 } 2872 2873 static struct device_attribute dev_attr_hotkey_tablet_mode = 2874 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL); 2875 2876 static void hotkey_tablet_mode_notify_change(void) 2877 { 2878 if (tp_features.hotkey_tablet) 2879 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2880 "hotkey_tablet_mode"); 2881 } 2882 2883 /* sysfs hotkey report_mode -------------------------------------------- */ 2884 static ssize_t hotkey_report_mode_show(struct device *dev, 2885 struct device_attribute *attr, 2886 char *buf) 2887 { 2888 return snprintf(buf, PAGE_SIZE, "%d\n", 2889 (hotkey_report_mode != 0) ? hotkey_report_mode : 1); 2890 } 2891 2892 static struct device_attribute dev_attr_hotkey_report_mode = 2893 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL); 2894 2895 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2896 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2897 struct device_attribute *attr, 2898 char *buf) 2899 { 2900 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2901 } 2902 2903 static struct device_attribute dev_attr_hotkey_wakeup_reason = 2904 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2905 2906 static void hotkey_wakeup_reason_notify_change(void) 2907 { 2908 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2909 "wakeup_reason"); 2910 } 2911 2912 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2913 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2914 struct device_attribute *attr, 2915 char *buf) 2916 { 2917 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2918 } 2919 2920 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete = 2921 __ATTR(wakeup_hotunplug_complete, S_IRUGO, 2922 hotkey_wakeup_hotunplug_complete_show, NULL); 2923 2924 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2925 { 2926 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2927 "wakeup_hotunplug_complete"); 2928 } 2929 2930 /* --------------------------------------------------------------------- */ 2931 2932 static struct attribute *hotkey_attributes[] __initdata = { 2933 &dev_attr_hotkey_enable.attr, 2934 &dev_attr_hotkey_bios_enabled.attr, 2935 &dev_attr_hotkey_bios_mask.attr, 2936 &dev_attr_hotkey_report_mode.attr, 2937 &dev_attr_hotkey_wakeup_reason.attr, 2938 &dev_attr_hotkey_wakeup_hotunplug_complete.attr, 2939 &dev_attr_hotkey_mask.attr, 2940 &dev_attr_hotkey_all_mask.attr, 2941 &dev_attr_hotkey_recommended_mask.attr, 2942 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2943 &dev_attr_hotkey_source_mask.attr, 2944 &dev_attr_hotkey_poll_freq.attr, 2945 #endif 2946 }; 2947 2948 /* 2949 * Sync both the hw and sw blocking state of all switches 2950 */ 2951 static void tpacpi_send_radiosw_update(void) 2952 { 2953 int wlsw; 2954 2955 /* 2956 * We must sync all rfkill controllers *before* issuing any 2957 * rfkill input events, or we will race the rfkill core input 2958 * handler. 2959 * 2960 * tpacpi_inputdev_send_mutex works as a syncronization point 2961 * for the above. 2962 * 2963 * We optimize to avoid numerous calls to hotkey_get_wlsw. 2964 */ 2965 2966 wlsw = hotkey_get_wlsw(); 2967 2968 /* Sync hw blocking state first if it is hw-blocked */ 2969 if (wlsw == TPACPI_RFK_RADIO_OFF) 2970 tpacpi_rfk_update_hwblock_state(true); 2971 2972 /* Sync sw blocking state */ 2973 tpacpi_rfk_update_swstate_all(); 2974 2975 /* Sync hw blocking state last if it is hw-unblocked */ 2976 if (wlsw == TPACPI_RFK_RADIO_ON) 2977 tpacpi_rfk_update_hwblock_state(false); 2978 2979 /* Issue rfkill input event for WLSW switch */ 2980 if (!(wlsw < 0)) { 2981 mutex_lock(&tpacpi_inputdev_send_mutex); 2982 2983 input_report_switch(tpacpi_inputdev, 2984 SW_RFKILL_ALL, (wlsw > 0)); 2985 input_sync(tpacpi_inputdev); 2986 2987 mutex_unlock(&tpacpi_inputdev_send_mutex); 2988 } 2989 2990 /* 2991 * this can be unconditional, as we will poll state again 2992 * if userspace uses the notify to read data 2993 */ 2994 hotkey_radio_sw_notify_change(); 2995 } 2996 2997 static void hotkey_exit(void) 2998 { 2999 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3000 mutex_lock(&hotkey_mutex); 3001 hotkey_poll_stop_sync(); 3002 mutex_unlock(&hotkey_mutex); 3003 #endif 3004 3005 if (hotkey_dev_attributes) 3006 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3007 3008 kfree(hotkey_keycode_map); 3009 3010 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3011 "restoring original HKEY status and mask\n"); 3012 /* yes, there is a bitwise or below, we want the 3013 * functions to be called even if one of them fail */ 3014 if (((tp_features.hotkey_mask && 3015 hotkey_mask_set(hotkey_orig_mask)) | 3016 hotkey_status_set(false)) != 0) 3017 printk(TPACPI_ERR 3018 "failed to restore hot key mask " 3019 "to BIOS defaults\n"); 3020 } 3021 3022 static void __init hotkey_unmap(const unsigned int scancode) 3023 { 3024 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3025 clear_bit(hotkey_keycode_map[scancode], 3026 tpacpi_inputdev->keybit); 3027 hotkey_keycode_map[scancode] = KEY_RESERVED; 3028 } 3029 } 3030 3031 /* 3032 * HKEY quirks: 3033 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3034 */ 3035 3036 #define TPACPI_HK_Q_INIMASK 0x0001 3037 3038 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3039 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3040 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3041 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3042 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3043 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3044 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3045 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3046 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3047 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3048 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3049 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3050 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3051 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3052 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3053 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3054 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3055 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3056 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3057 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3058 }; 3059 3060 static int __init hotkey_init(struct ibm_init_struct *iibm) 3061 { 3062 /* Requirements for changing the default keymaps: 3063 * 3064 * 1. Many of the keys are mapped to KEY_RESERVED for very 3065 * good reasons. Do not change them unless you have deep 3066 * knowledge on the IBM and Lenovo ThinkPad firmware for 3067 * the various ThinkPad models. The driver behaves 3068 * differently for KEY_RESERVED: such keys have their 3069 * hot key mask *unset* in mask_recommended, and also 3070 * in the initial hot key mask programmed into the 3071 * firmware at driver load time, which means the firm- 3072 * ware may react very differently if you change them to 3073 * something else; 3074 * 3075 * 2. You must be subscribed to the linux-thinkpad and 3076 * ibm-acpi-devel mailing lists, and you should read the 3077 * list archives since 2007 if you want to change the 3078 * keymaps. This requirement exists so that you will 3079 * know the past history of problems with the thinkpad- 3080 * acpi driver keymaps, and also that you will be 3081 * listening to any bug reports; 3082 * 3083 * 3. Do not send thinkpad-acpi specific patches directly to 3084 * for merging, *ever*. Send them to the linux-acpi 3085 * mailinglist for comments. Merging is to be done only 3086 * through acpi-test and the ACPI maintainer. 3087 * 3088 * If the above is too much to ask, don't change the keymap. 3089 * Ask the thinkpad-acpi maintainer to do it, instead. 3090 */ 3091 static u16 ibm_keycode_map[] __initdata = { 3092 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3093 KEY_FN_F1, KEY_FN_F2, KEY_COFFEE, KEY_SLEEP, 3094 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3095 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3096 3097 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3098 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3099 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3100 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3101 3102 /* brightness: firmware always reacts to them */ 3103 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3104 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3105 3106 /* Thinklight: firmware always react to it */ 3107 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3108 3109 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3110 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3111 3112 /* Volume: firmware always react to it and reprograms 3113 * the built-in *extra* mixer. Never map it to control 3114 * another mixer by default. */ 3115 KEY_RESERVED, /* 0x14: VOLUME UP */ 3116 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3117 KEY_RESERVED, /* 0x16: MUTE */ 3118 3119 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3120 3121 /* (assignments unknown, please report if found) */ 3122 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3123 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3124 }; 3125 static u16 lenovo_keycode_map[] __initdata = { 3126 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3127 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3128 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3129 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3130 3131 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3132 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3133 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3134 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3135 3136 /* These should be enabled --only-- when ACPI video 3137 * is disabled (i.e. in "vendor" mode), and are handled 3138 * in a special way by the init code */ 3139 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3140 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3141 3142 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3143 3144 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3145 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3146 3147 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3148 * react to it and reprograms the built-in *extra* mixer. 3149 * Never map it to control another mixer by default. 3150 * 3151 * T60?, T61, R60?, R61: firmware and EC tries to send 3152 * these over the regular keyboard, so these are no-ops, 3153 * but there are still weird bugs re. MUTE, so do not 3154 * change unless you get test reports from all Lenovo 3155 * models. May cause the BIOS to interfere with the 3156 * HDA mixer. 3157 */ 3158 KEY_RESERVED, /* 0x14: VOLUME UP */ 3159 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3160 KEY_RESERVED, /* 0x16: MUTE */ 3161 3162 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3163 3164 /* (assignments unknown, please report if found) */ 3165 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3166 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3167 }; 3168 3169 #define TPACPI_HOTKEY_MAP_LEN ARRAY_SIZE(ibm_keycode_map) 3170 #define TPACPI_HOTKEY_MAP_SIZE sizeof(ibm_keycode_map) 3171 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(ibm_keycode_map[0]) 3172 3173 int res, i; 3174 int status; 3175 int hkeyv; 3176 3177 unsigned long quirks; 3178 3179 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3180 "initializing hotkey subdriver\n"); 3181 3182 BUG_ON(!tpacpi_inputdev); 3183 BUG_ON(tpacpi_inputdev->open != NULL || 3184 tpacpi_inputdev->close != NULL); 3185 3186 TPACPI_ACPIHANDLE_INIT(hkey); 3187 mutex_init(&hotkey_mutex); 3188 3189 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3190 mutex_init(&hotkey_thread_mutex); 3191 mutex_init(&hotkey_thread_data_mutex); 3192 #endif 3193 3194 /* hotkey not supported on 570 */ 3195 tp_features.hotkey = hkey_handle != NULL; 3196 3197 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3198 "hotkeys are %s\n", 3199 str_supported(tp_features.hotkey)); 3200 3201 if (!tp_features.hotkey) 3202 return 1; 3203 3204 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3205 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3206 3207 tpacpi_disable_brightness_delay(); 3208 3209 /* MUST have enough space for all attributes to be added to 3210 * hotkey_dev_attributes */ 3211 hotkey_dev_attributes = create_attr_set( 3212 ARRAY_SIZE(hotkey_attributes) + 2, 3213 NULL); 3214 if (!hotkey_dev_attributes) 3215 return -ENOMEM; 3216 res = add_many_to_attr_set(hotkey_dev_attributes, 3217 hotkey_attributes, 3218 ARRAY_SIZE(hotkey_attributes)); 3219 if (res) 3220 goto err_exit; 3221 3222 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3223 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3224 for HKEY interface version 0x100 */ 3225 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3226 if ((hkeyv >> 8) != 1) { 3227 printk(TPACPI_ERR "unknown version of the " 3228 "HKEY interface: 0x%x\n", hkeyv); 3229 printk(TPACPI_ERR "please report this to %s\n", 3230 TPACPI_MAIL); 3231 } else { 3232 /* 3233 * MHKV 0x100 in A31, R40, R40e, 3234 * T4x, X31, and later 3235 */ 3236 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3237 "firmware HKEY interface version: 0x%x\n", 3238 hkeyv); 3239 3240 /* Paranoia check AND init hotkey_all_mask */ 3241 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3242 "MHKA", "qd")) { 3243 printk(TPACPI_ERR 3244 "missing MHKA handler, " 3245 "please report this to %s\n", 3246 TPACPI_MAIL); 3247 /* Fallback: pre-init for FN+F3,F4,F12 */ 3248 hotkey_all_mask = 0x080cU; 3249 } else { 3250 tp_features.hotkey_mask = 1; 3251 } 3252 } 3253 } 3254 3255 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3256 "hotkey masks are %s\n", 3257 str_supported(tp_features.hotkey_mask)); 3258 3259 /* Init hotkey_all_mask if not initialized yet */ 3260 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3261 (quirks & TPACPI_HK_Q_INIMASK)) 3262 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3263 3264 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3265 if (tp_features.hotkey_mask) { 3266 /* hotkey_source_mask *must* be zero for 3267 * the first hotkey_mask_get to return hotkey_orig_mask */ 3268 res = hotkey_mask_get(); 3269 if (res) 3270 goto err_exit; 3271 3272 hotkey_orig_mask = hotkey_acpi_mask; 3273 } else { 3274 hotkey_orig_mask = hotkey_all_mask; 3275 hotkey_acpi_mask = hotkey_all_mask; 3276 } 3277 3278 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3279 if (dbg_wlswemul) { 3280 tp_features.hotkey_wlsw = 1; 3281 printk(TPACPI_INFO 3282 "radio switch emulation enabled\n"); 3283 } else 3284 #endif 3285 /* Not all thinkpads have a hardware radio switch */ 3286 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3287 tp_features.hotkey_wlsw = 1; 3288 printk(TPACPI_INFO 3289 "radio switch found; radios are %s\n", 3290 enabled(status, 0)); 3291 } 3292 if (tp_features.hotkey_wlsw) 3293 res = add_to_attr_set(hotkey_dev_attributes, 3294 &dev_attr_hotkey_radio_sw.attr); 3295 3296 /* For X41t, X60t, X61t Tablets... */ 3297 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3298 tp_features.hotkey_tablet = 1; 3299 printk(TPACPI_INFO 3300 "possible tablet mode switch found; " 3301 "ThinkPad in %s mode\n", 3302 (status & TP_HOTKEY_TABLET_MASK)? 3303 "tablet" : "laptop"); 3304 res = add_to_attr_set(hotkey_dev_attributes, 3305 &dev_attr_hotkey_tablet_mode.attr); 3306 } 3307 3308 if (!res) 3309 res = register_attr_set_with_sysfs( 3310 hotkey_dev_attributes, 3311 &tpacpi_pdev->dev.kobj); 3312 if (res) 3313 goto err_exit; 3314 3315 /* Set up key map */ 3316 3317 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3318 GFP_KERNEL); 3319 if (!hotkey_keycode_map) { 3320 printk(TPACPI_ERR 3321 "failed to allocate memory for key map\n"); 3322 res = -ENOMEM; 3323 goto err_exit; 3324 } 3325 3326 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) { 3327 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3328 "using Lenovo default hot key map\n"); 3329 memcpy(hotkey_keycode_map, &lenovo_keycode_map, 3330 TPACPI_HOTKEY_MAP_SIZE); 3331 } else { 3332 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3333 "using IBM default hot key map\n"); 3334 memcpy(hotkey_keycode_map, &ibm_keycode_map, 3335 TPACPI_HOTKEY_MAP_SIZE); 3336 } 3337 3338 set_bit(EV_KEY, tpacpi_inputdev->evbit); 3339 set_bit(EV_MSC, tpacpi_inputdev->evbit); 3340 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit); 3341 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3342 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3343 tpacpi_inputdev->keycode = hotkey_keycode_map; 3344 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3345 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3346 set_bit(hotkey_keycode_map[i], 3347 tpacpi_inputdev->keybit); 3348 } else { 3349 if (i < sizeof(hotkey_reserved_mask)*8) 3350 hotkey_reserved_mask |= 1 << i; 3351 } 3352 } 3353 3354 if (tp_features.hotkey_wlsw) { 3355 set_bit(EV_SW, tpacpi_inputdev->evbit); 3356 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit); 3357 } 3358 if (tp_features.hotkey_tablet) { 3359 set_bit(EV_SW, tpacpi_inputdev->evbit); 3360 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit); 3361 } 3362 3363 /* Do not issue duplicate brightness change events to 3364 * userspace */ 3365 if (!tp_features.bright_acpimode) 3366 /* update bright_acpimode... */ 3367 tpacpi_check_std_acpi_brightness_support(); 3368 3369 if (tp_features.bright_acpimode && acpi_video_backlight_support()) { 3370 printk(TPACPI_INFO 3371 "This ThinkPad has standard ACPI backlight " 3372 "brightness control, supported by the ACPI " 3373 "video driver\n"); 3374 printk(TPACPI_NOTICE 3375 "Disabling thinkpad-acpi brightness events " 3376 "by default...\n"); 3377 3378 /* Disable brightness up/down on Lenovo thinkpads when 3379 * ACPI is handling them, otherwise it is plain impossible 3380 * for userspace to do something even remotely sane */ 3381 hotkey_reserved_mask |= 3382 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3383 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3384 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3385 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3386 } 3387 3388 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3389 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3390 & ~hotkey_all_mask 3391 & ~hotkey_reserved_mask; 3392 3393 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3394 "hotkey source mask 0x%08x, polling freq %u\n", 3395 hotkey_source_mask, hotkey_poll_freq); 3396 #endif 3397 3398 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3399 "enabling firmware HKEY event interface...\n"); 3400 res = hotkey_status_set(true); 3401 if (res) { 3402 hotkey_exit(); 3403 return res; 3404 } 3405 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3406 | hotkey_driver_mask) 3407 & ~hotkey_source_mask); 3408 if (res < 0 && res != -ENXIO) { 3409 hotkey_exit(); 3410 return res; 3411 } 3412 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3413 & ~hotkey_reserved_mask; 3414 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3415 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3416 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3417 3418 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3419 "legacy ibm/hotkey event reporting over procfs %s\n", 3420 (hotkey_report_mode < 2) ? 3421 "enabled" : "disabled"); 3422 3423 tpacpi_inputdev->open = &hotkey_inputdev_open; 3424 tpacpi_inputdev->close = &hotkey_inputdev_close; 3425 3426 hotkey_poll_setup_safe(true); 3427 tpacpi_send_radiosw_update(); 3428 tpacpi_input_send_tabletsw(); 3429 3430 return 0; 3431 3432 err_exit: 3433 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3434 hotkey_dev_attributes = NULL; 3435 3436 return (res < 0)? res : 1; 3437 } 3438 3439 static bool hotkey_notify_hotkey(const u32 hkey, 3440 bool *send_acpi_ev, 3441 bool *ignore_acpi_ev) 3442 { 3443 /* 0x1000-0x1FFF: key presses */ 3444 unsigned int scancode = hkey & 0xfff; 3445 *send_acpi_ev = true; 3446 *ignore_acpi_ev = false; 3447 3448 if (scancode > 0 && scancode < 0x21) { 3449 scancode--; 3450 if (!(hotkey_source_mask & (1 << scancode))) { 3451 tpacpi_input_send_key_masked(scancode); 3452 *send_acpi_ev = false; 3453 } else { 3454 *ignore_acpi_ev = true; 3455 } 3456 return true; 3457 } 3458 return false; 3459 } 3460 3461 static bool hotkey_notify_wakeup(const u32 hkey, 3462 bool *send_acpi_ev, 3463 bool *ignore_acpi_ev) 3464 { 3465 /* 0x2000-0x2FFF: Wakeup reason */ 3466 *send_acpi_ev = true; 3467 *ignore_acpi_ev = false; 3468 3469 switch (hkey) { 3470 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3471 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3472 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3473 *ignore_acpi_ev = true; 3474 break; 3475 3476 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3477 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3478 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3479 *ignore_acpi_ev = true; 3480 break; 3481 3482 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3483 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3484 printk(TPACPI_ALERT 3485 "EMERGENCY WAKEUP: battery almost empty\n"); 3486 /* how to auto-heal: */ 3487 /* 2313: woke up from S3, go to S4/S5 */ 3488 /* 2413: woke up from S4, go to S5 */ 3489 break; 3490 3491 default: 3492 return false; 3493 } 3494 3495 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3496 printk(TPACPI_INFO 3497 "woke up due to a hot-unplug " 3498 "request...\n"); 3499 hotkey_wakeup_reason_notify_change(); 3500 } 3501 return true; 3502 } 3503 3504 static bool hotkey_notify_usrevent(const u32 hkey, 3505 bool *send_acpi_ev, 3506 bool *ignore_acpi_ev) 3507 { 3508 /* 0x5000-0x5FFF: human interface helpers */ 3509 *send_acpi_ev = true; 3510 *ignore_acpi_ev = false; 3511 3512 switch (hkey) { 3513 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3514 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3515 return true; 3516 3517 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3518 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3519 tpacpi_input_send_tabletsw(); 3520 hotkey_tablet_mode_notify_change(); 3521 *send_acpi_ev = false; 3522 return true; 3523 3524 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3525 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3526 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3527 /* do not propagate these events */ 3528 *ignore_acpi_ev = true; 3529 return true; 3530 3531 default: 3532 return false; 3533 } 3534 } 3535 3536 static bool hotkey_notify_thermal(const u32 hkey, 3537 bool *send_acpi_ev, 3538 bool *ignore_acpi_ev) 3539 { 3540 /* 0x6000-0x6FFF: thermal alarms */ 3541 *send_acpi_ev = true; 3542 *ignore_acpi_ev = false; 3543 3544 switch (hkey) { 3545 case TP_HKEY_EV_ALARM_BAT_HOT: 3546 printk(TPACPI_CRIT 3547 "THERMAL ALARM: battery is too hot!\n"); 3548 /* recommended action: warn user through gui */ 3549 return true; 3550 case TP_HKEY_EV_ALARM_BAT_XHOT: 3551 printk(TPACPI_ALERT 3552 "THERMAL EMERGENCY: battery is extremely hot!\n"); 3553 /* recommended action: immediate sleep/hibernate */ 3554 return true; 3555 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3556 printk(TPACPI_CRIT 3557 "THERMAL ALARM: " 3558 "a sensor reports something is too hot!\n"); 3559 /* recommended action: warn user through gui, that */ 3560 /* some internal component is too hot */ 3561 return true; 3562 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3563 printk(TPACPI_ALERT 3564 "THERMAL EMERGENCY: " 3565 "a sensor reports something is extremely hot!\n"); 3566 /* recommended action: immediate sleep/hibernate */ 3567 return true; 3568 case TP_HKEY_EV_THM_TABLE_CHANGED: 3569 printk(TPACPI_INFO 3570 "EC reports that Thermal Table has changed\n"); 3571 /* recommended action: do nothing, we don't have 3572 * Lenovo ATM information */ 3573 return true; 3574 default: 3575 printk(TPACPI_ALERT 3576 "THERMAL ALERT: unknown thermal alarm received\n"); 3577 return false; 3578 } 3579 } 3580 3581 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3582 { 3583 u32 hkey; 3584 bool send_acpi_ev; 3585 bool ignore_acpi_ev; 3586 bool known_ev; 3587 3588 if (event != 0x80) { 3589 printk(TPACPI_ERR 3590 "unknown HKEY notification event %d\n", event); 3591 /* forward it to userspace, maybe it knows how to handle it */ 3592 acpi_bus_generate_netlink_event( 3593 ibm->acpi->device->pnp.device_class, 3594 dev_name(&ibm->acpi->device->dev), 3595 event, 0); 3596 return; 3597 } 3598 3599 while (1) { 3600 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3601 printk(TPACPI_ERR "failed to retrieve HKEY event\n"); 3602 return; 3603 } 3604 3605 if (hkey == 0) { 3606 /* queue empty */ 3607 return; 3608 } 3609 3610 send_acpi_ev = true; 3611 ignore_acpi_ev = false; 3612 3613 switch (hkey >> 12) { 3614 case 1: 3615 /* 0x1000-0x1FFF: key presses */ 3616 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3617 &ignore_acpi_ev); 3618 break; 3619 case 2: 3620 /* 0x2000-0x2FFF: Wakeup reason */ 3621 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3622 &ignore_acpi_ev); 3623 break; 3624 case 3: 3625 /* 0x3000-0x3FFF: bay-related wakeups */ 3626 if (hkey == TP_HKEY_EV_BAYEJ_ACK) { 3627 hotkey_autosleep_ack = 1; 3628 printk(TPACPI_INFO 3629 "bay ejected\n"); 3630 hotkey_wakeup_hotunplug_complete_notify_change(); 3631 known_ev = true; 3632 } else { 3633 known_ev = false; 3634 } 3635 break; 3636 case 4: 3637 /* 0x4000-0x4FFF: dock-related wakeups */ 3638 if (hkey == TP_HKEY_EV_UNDOCK_ACK) { 3639 hotkey_autosleep_ack = 1; 3640 printk(TPACPI_INFO 3641 "undocked\n"); 3642 hotkey_wakeup_hotunplug_complete_notify_change(); 3643 known_ev = true; 3644 } else { 3645 known_ev = false; 3646 } 3647 break; 3648 case 5: 3649 /* 0x5000-0x5FFF: human interface helpers */ 3650 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3651 &ignore_acpi_ev); 3652 break; 3653 case 6: 3654 /* 0x6000-0x6FFF: thermal alarms */ 3655 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev, 3656 &ignore_acpi_ev); 3657 break; 3658 case 7: 3659 /* 0x7000-0x7FFF: misc */ 3660 if (tp_features.hotkey_wlsw && 3661 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3662 tpacpi_send_radiosw_update(); 3663 send_acpi_ev = 0; 3664 known_ev = true; 3665 break; 3666 } 3667 /* fallthrough to default */ 3668 default: 3669 known_ev = false; 3670 } 3671 if (!known_ev) { 3672 printk(TPACPI_NOTICE 3673 "unhandled HKEY event 0x%04x\n", hkey); 3674 printk(TPACPI_NOTICE 3675 "please report the conditions when this " 3676 "event happened to %s\n", TPACPI_MAIL); 3677 } 3678 3679 /* Legacy events */ 3680 if (!ignore_acpi_ev && 3681 (send_acpi_ev || hotkey_report_mode < 2)) { 3682 acpi_bus_generate_proc_event(ibm->acpi->device, 3683 event, hkey); 3684 } 3685 3686 /* netlink events */ 3687 if (!ignore_acpi_ev && send_acpi_ev) { 3688 acpi_bus_generate_netlink_event( 3689 ibm->acpi->device->pnp.device_class, 3690 dev_name(&ibm->acpi->device->dev), 3691 event, hkey); 3692 } 3693 } 3694 } 3695 3696 static void hotkey_suspend(pm_message_t state) 3697 { 3698 /* Do these on suspend, we get the events on early resume! */ 3699 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 3700 hotkey_autosleep_ack = 0; 3701 } 3702 3703 static void hotkey_resume(void) 3704 { 3705 tpacpi_disable_brightness_delay(); 3706 3707 if (hotkey_status_set(true) < 0 || 3708 hotkey_mask_set(hotkey_acpi_mask) < 0) 3709 printk(TPACPI_ERR 3710 "error while attempting to reset the event " 3711 "firmware interface\n"); 3712 3713 tpacpi_send_radiosw_update(); 3714 hotkey_tablet_mode_notify_change(); 3715 hotkey_wakeup_reason_notify_change(); 3716 hotkey_wakeup_hotunplug_complete_notify_change(); 3717 hotkey_poll_setup_safe(false); 3718 } 3719 3720 /* procfs -------------------------------------------------------------- */ 3721 static int hotkey_read(char *p) 3722 { 3723 int res, status; 3724 int len = 0; 3725 3726 if (!tp_features.hotkey) { 3727 len += sprintf(p + len, "status:\t\tnot supported\n"); 3728 return len; 3729 } 3730 3731 if (mutex_lock_killable(&hotkey_mutex)) 3732 return -ERESTARTSYS; 3733 res = hotkey_status_get(&status); 3734 if (!res) 3735 res = hotkey_mask_get(); 3736 mutex_unlock(&hotkey_mutex); 3737 if (res) 3738 return res; 3739 3740 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0)); 3741 if (hotkey_all_mask) { 3742 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_user_mask); 3743 len += sprintf(p + len, 3744 "commands:\tenable, disable, reset, <mask>\n"); 3745 } else { 3746 len += sprintf(p + len, "mask:\t\tnot supported\n"); 3747 len += sprintf(p + len, "commands:\tenable, disable, reset\n"); 3748 } 3749 3750 return len; 3751 } 3752 3753 static void hotkey_enabledisable_warn(bool enable) 3754 { 3755 tpacpi_log_usertask("procfs hotkey enable/disable"); 3756 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 3757 TPACPI_WARN 3758 "hotkey enable/disable functionality has been " 3759 "removed from the driver. Hotkeys are always " 3760 "enabled\n")) 3761 printk(TPACPI_ERR 3762 "Please remove the hotkey=enable module " 3763 "parameter, it is deprecated. Hotkeys are always " 3764 "enabled\n"); 3765 } 3766 3767 static int hotkey_write(char *buf) 3768 { 3769 int res; 3770 u32 mask; 3771 char *cmd; 3772 3773 if (!tp_features.hotkey) 3774 return -ENODEV; 3775 3776 if (mutex_lock_killable(&hotkey_mutex)) 3777 return -ERESTARTSYS; 3778 3779 mask = hotkey_user_mask; 3780 3781 res = 0; 3782 while ((cmd = next_cmd(&buf))) { 3783 if (strlencmp(cmd, "enable") == 0) { 3784 hotkey_enabledisable_warn(1); 3785 } else if (strlencmp(cmd, "disable") == 0) { 3786 hotkey_enabledisable_warn(0); 3787 res = -EPERM; 3788 } else if (strlencmp(cmd, "reset") == 0) { 3789 mask = (hotkey_all_mask | hotkey_source_mask) 3790 & ~hotkey_reserved_mask; 3791 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 3792 /* mask set */ 3793 } else if (sscanf(cmd, "%x", &mask) == 1) { 3794 /* mask set */ 3795 } else { 3796 res = -EINVAL; 3797 goto errexit; 3798 } 3799 } 3800 3801 if (!res) { 3802 tpacpi_disclose_usertask("procfs hotkey", 3803 "set mask to 0x%08x\n", mask); 3804 res = hotkey_user_mask_set(mask); 3805 } 3806 3807 errexit: 3808 mutex_unlock(&hotkey_mutex); 3809 return res; 3810 } 3811 3812 static const struct acpi_device_id ibm_htk_device_ids[] = { 3813 {TPACPI_ACPI_HKEY_HID, 0}, 3814 {"", 0}, 3815 }; 3816 3817 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 3818 .hid = ibm_htk_device_ids, 3819 .notify = hotkey_notify, 3820 .handle = &hkey_handle, 3821 .type = ACPI_DEVICE_NOTIFY, 3822 }; 3823 3824 static struct ibm_struct hotkey_driver_data = { 3825 .name = "hotkey", 3826 .read = hotkey_read, 3827 .write = hotkey_write, 3828 .exit = hotkey_exit, 3829 .resume = hotkey_resume, 3830 .suspend = hotkey_suspend, 3831 .acpi = &ibm_hotkey_acpidriver, 3832 }; 3833 3834 /************************************************************************* 3835 * Bluetooth subdriver 3836 */ 3837 3838 enum { 3839 /* ACPI GBDC/SBDC bits */ 3840 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 3841 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 3842 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 3843 off / last state */ 3844 }; 3845 3846 enum { 3847 /* ACPI \BLTH commands */ 3848 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 3849 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 3850 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 3851 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 3852 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 3853 }; 3854 3855 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 3856 3857 static void bluetooth_suspend(pm_message_t state) 3858 { 3859 /* Try to make sure radio will resume powered off */ 3860 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 3861 TP_ACPI_BLTH_PWR_OFF_ON_RESUME)) 3862 vdbg_printk(TPACPI_DBG_RFKILL, 3863 "bluetooth power down on resume request failed\n"); 3864 } 3865 3866 static int bluetooth_get_status(void) 3867 { 3868 int status; 3869 3870 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3871 if (dbg_bluetoothemul) 3872 return (tpacpi_bluetooth_emulstate) ? 3873 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3874 #endif 3875 3876 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 3877 return -EIO; 3878 3879 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 3880 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3881 } 3882 3883 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 3884 { 3885 int status; 3886 3887 vdbg_printk(TPACPI_DBG_RFKILL, 3888 "will attempt to %s bluetooth\n", 3889 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 3890 3891 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3892 if (dbg_bluetoothemul) { 3893 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 3894 return 0; 3895 } 3896 #endif 3897 3898 /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */ 3899 if (state == TPACPI_RFK_RADIO_ON) 3900 status = TP_ACPI_BLUETOOTH_RADIOSSW; 3901 else 3902 status = 0; 3903 3904 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 3905 return -EIO; 3906 3907 return 0; 3908 } 3909 3910 /* sysfs bluetooth enable ---------------------------------------------- */ 3911 static ssize_t bluetooth_enable_show(struct device *dev, 3912 struct device_attribute *attr, 3913 char *buf) 3914 { 3915 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 3916 attr, buf); 3917 } 3918 3919 static ssize_t bluetooth_enable_store(struct device *dev, 3920 struct device_attribute *attr, 3921 const char *buf, size_t count) 3922 { 3923 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 3924 attr, buf, count); 3925 } 3926 3927 static struct device_attribute dev_attr_bluetooth_enable = 3928 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO, 3929 bluetooth_enable_show, bluetooth_enable_store); 3930 3931 /* --------------------------------------------------------------------- */ 3932 3933 static struct attribute *bluetooth_attributes[] = { 3934 &dev_attr_bluetooth_enable.attr, 3935 NULL 3936 }; 3937 3938 static const struct attribute_group bluetooth_attr_group = { 3939 .attrs = bluetooth_attributes, 3940 }; 3941 3942 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 3943 .get_status = bluetooth_get_status, 3944 .set_status = bluetooth_set_status, 3945 }; 3946 3947 static void bluetooth_shutdown(void) 3948 { 3949 /* Order firmware to save current state to NVRAM */ 3950 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 3951 TP_ACPI_BLTH_SAVE_STATE)) 3952 printk(TPACPI_NOTICE 3953 "failed to save bluetooth state to NVRAM\n"); 3954 else 3955 vdbg_printk(TPACPI_DBG_RFKILL, 3956 "bluestooth state saved to NVRAM\n"); 3957 } 3958 3959 static void bluetooth_exit(void) 3960 { 3961 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3962 &bluetooth_attr_group); 3963 3964 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 3965 3966 bluetooth_shutdown(); 3967 } 3968 3969 static int __init bluetooth_init(struct ibm_init_struct *iibm) 3970 { 3971 int res; 3972 int status = 0; 3973 3974 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 3975 "initializing bluetooth subdriver\n"); 3976 3977 TPACPI_ACPIHANDLE_INIT(hkey); 3978 3979 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 3980 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 3981 tp_features.bluetooth = hkey_handle && 3982 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 3983 3984 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 3985 "bluetooth is %s, status 0x%02x\n", 3986 str_supported(tp_features.bluetooth), 3987 status); 3988 3989 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3990 if (dbg_bluetoothemul) { 3991 tp_features.bluetooth = 1; 3992 printk(TPACPI_INFO 3993 "bluetooth switch emulation enabled\n"); 3994 } else 3995 #endif 3996 if (tp_features.bluetooth && 3997 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 3998 /* no bluetooth hardware present in system */ 3999 tp_features.bluetooth = 0; 4000 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4001 "bluetooth hardware not installed\n"); 4002 } 4003 4004 if (!tp_features.bluetooth) 4005 return 1; 4006 4007 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4008 &bluetooth_tprfk_ops, 4009 RFKILL_TYPE_BLUETOOTH, 4010 TPACPI_RFK_BLUETOOTH_SW_NAME, 4011 true); 4012 if (res) 4013 return res; 4014 4015 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4016 &bluetooth_attr_group); 4017 if (res) { 4018 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4019 return res; 4020 } 4021 4022 return 0; 4023 } 4024 4025 /* procfs -------------------------------------------------------------- */ 4026 static int bluetooth_read(char *p) 4027 { 4028 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p); 4029 } 4030 4031 static int bluetooth_write(char *buf) 4032 { 4033 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4034 } 4035 4036 static struct ibm_struct bluetooth_driver_data = { 4037 .name = "bluetooth", 4038 .read = bluetooth_read, 4039 .write = bluetooth_write, 4040 .exit = bluetooth_exit, 4041 .suspend = bluetooth_suspend, 4042 .shutdown = bluetooth_shutdown, 4043 }; 4044 4045 /************************************************************************* 4046 * Wan subdriver 4047 */ 4048 4049 enum { 4050 /* ACPI GWAN/SWAN bits */ 4051 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4052 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4053 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4054 off / last state */ 4055 }; 4056 4057 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4058 4059 static void wan_suspend(pm_message_t state) 4060 { 4061 /* Try to make sure radio will resume powered off */ 4062 if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd", 4063 TP_ACPI_WGSV_PWR_OFF_ON_RESUME)) 4064 vdbg_printk(TPACPI_DBG_RFKILL, 4065 "WWAN power down on resume request failed\n"); 4066 } 4067 4068 static int wan_get_status(void) 4069 { 4070 int status; 4071 4072 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4073 if (dbg_wwanemul) 4074 return (tpacpi_wwan_emulstate) ? 4075 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4076 #endif 4077 4078 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4079 return -EIO; 4080 4081 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4082 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4083 } 4084 4085 static int wan_set_status(enum tpacpi_rfkill_state state) 4086 { 4087 int status; 4088 4089 vdbg_printk(TPACPI_DBG_RFKILL, 4090 "will attempt to %s wwan\n", 4091 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4092 4093 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4094 if (dbg_wwanemul) { 4095 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4096 return 0; 4097 } 4098 #endif 4099 4100 /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */ 4101 if (state == TPACPI_RFK_RADIO_ON) 4102 status = TP_ACPI_WANCARD_RADIOSSW; 4103 else 4104 status = 0; 4105 4106 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4107 return -EIO; 4108 4109 return 0; 4110 } 4111 4112 /* sysfs wan enable ---------------------------------------------------- */ 4113 static ssize_t wan_enable_show(struct device *dev, 4114 struct device_attribute *attr, 4115 char *buf) 4116 { 4117 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4118 attr, buf); 4119 } 4120 4121 static ssize_t wan_enable_store(struct device *dev, 4122 struct device_attribute *attr, 4123 const char *buf, size_t count) 4124 { 4125 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4126 attr, buf, count); 4127 } 4128 4129 static struct device_attribute dev_attr_wan_enable = 4130 __ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4131 wan_enable_show, wan_enable_store); 4132 4133 /* --------------------------------------------------------------------- */ 4134 4135 static struct attribute *wan_attributes[] = { 4136 &dev_attr_wan_enable.attr, 4137 NULL 4138 }; 4139 4140 static const struct attribute_group wan_attr_group = { 4141 .attrs = wan_attributes, 4142 }; 4143 4144 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4145 .get_status = wan_get_status, 4146 .set_status = wan_set_status, 4147 }; 4148 4149 static void wan_shutdown(void) 4150 { 4151 /* Order firmware to save current state to NVRAM */ 4152 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4153 TP_ACPI_WGSV_SAVE_STATE)) 4154 printk(TPACPI_NOTICE 4155 "failed to save WWAN state to NVRAM\n"); 4156 else 4157 vdbg_printk(TPACPI_DBG_RFKILL, 4158 "WWAN state saved to NVRAM\n"); 4159 } 4160 4161 static void wan_exit(void) 4162 { 4163 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4164 &wan_attr_group); 4165 4166 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4167 4168 wan_shutdown(); 4169 } 4170 4171 static int __init wan_init(struct ibm_init_struct *iibm) 4172 { 4173 int res; 4174 int status = 0; 4175 4176 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4177 "initializing wan subdriver\n"); 4178 4179 TPACPI_ACPIHANDLE_INIT(hkey); 4180 4181 tp_features.wan = hkey_handle && 4182 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4183 4184 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4185 "wan is %s, status 0x%02x\n", 4186 str_supported(tp_features.wan), 4187 status); 4188 4189 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4190 if (dbg_wwanemul) { 4191 tp_features.wan = 1; 4192 printk(TPACPI_INFO 4193 "wwan switch emulation enabled\n"); 4194 } else 4195 #endif 4196 if (tp_features.wan && 4197 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4198 /* no wan hardware present in system */ 4199 tp_features.wan = 0; 4200 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4201 "wan hardware not installed\n"); 4202 } 4203 4204 if (!tp_features.wan) 4205 return 1; 4206 4207 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4208 &wan_tprfk_ops, 4209 RFKILL_TYPE_WWAN, 4210 TPACPI_RFK_WWAN_SW_NAME, 4211 true); 4212 if (res) 4213 return res; 4214 4215 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4216 &wan_attr_group); 4217 4218 if (res) { 4219 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4220 return res; 4221 } 4222 4223 return 0; 4224 } 4225 4226 /* procfs -------------------------------------------------------------- */ 4227 static int wan_read(char *p) 4228 { 4229 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p); 4230 } 4231 4232 static int wan_write(char *buf) 4233 { 4234 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4235 } 4236 4237 static struct ibm_struct wan_driver_data = { 4238 .name = "wan", 4239 .read = wan_read, 4240 .write = wan_write, 4241 .exit = wan_exit, 4242 .suspend = wan_suspend, 4243 .shutdown = wan_shutdown, 4244 }; 4245 4246 /************************************************************************* 4247 * UWB subdriver 4248 */ 4249 4250 enum { 4251 /* ACPI GUWB/SUWB bits */ 4252 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4253 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4254 }; 4255 4256 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4257 4258 static int uwb_get_status(void) 4259 { 4260 int status; 4261 4262 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4263 if (dbg_uwbemul) 4264 return (tpacpi_uwb_emulstate) ? 4265 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4266 #endif 4267 4268 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4269 return -EIO; 4270 4271 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4272 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4273 } 4274 4275 static int uwb_set_status(enum tpacpi_rfkill_state state) 4276 { 4277 int status; 4278 4279 vdbg_printk(TPACPI_DBG_RFKILL, 4280 "will attempt to %s UWB\n", 4281 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4282 4283 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4284 if (dbg_uwbemul) { 4285 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4286 return 0; 4287 } 4288 #endif 4289 4290 if (state == TPACPI_RFK_RADIO_ON) 4291 status = TP_ACPI_UWB_RADIOSSW; 4292 else 4293 status = 0; 4294 4295 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4296 return -EIO; 4297 4298 return 0; 4299 } 4300 4301 /* --------------------------------------------------------------------- */ 4302 4303 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4304 .get_status = uwb_get_status, 4305 .set_status = uwb_set_status, 4306 }; 4307 4308 static void uwb_exit(void) 4309 { 4310 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4311 } 4312 4313 static int __init uwb_init(struct ibm_init_struct *iibm) 4314 { 4315 int res; 4316 int status = 0; 4317 4318 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4319 "initializing uwb subdriver\n"); 4320 4321 TPACPI_ACPIHANDLE_INIT(hkey); 4322 4323 tp_features.uwb = hkey_handle && 4324 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4325 4326 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4327 "uwb is %s, status 0x%02x\n", 4328 str_supported(tp_features.uwb), 4329 status); 4330 4331 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4332 if (dbg_uwbemul) { 4333 tp_features.uwb = 1; 4334 printk(TPACPI_INFO 4335 "uwb switch emulation enabled\n"); 4336 } else 4337 #endif 4338 if (tp_features.uwb && 4339 !(status & TP_ACPI_UWB_HWPRESENT)) { 4340 /* no uwb hardware present in system */ 4341 tp_features.uwb = 0; 4342 dbg_printk(TPACPI_DBG_INIT, 4343 "uwb hardware not installed\n"); 4344 } 4345 4346 if (!tp_features.uwb) 4347 return 1; 4348 4349 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4350 &uwb_tprfk_ops, 4351 RFKILL_TYPE_UWB, 4352 TPACPI_RFK_UWB_SW_NAME, 4353 false); 4354 return res; 4355 } 4356 4357 static struct ibm_struct uwb_driver_data = { 4358 .name = "uwb", 4359 .exit = uwb_exit, 4360 .flags.experimental = 1, 4361 }; 4362 4363 /************************************************************************* 4364 * Video subdriver 4365 */ 4366 4367 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4368 4369 enum video_access_mode { 4370 TPACPI_VIDEO_NONE = 0, 4371 TPACPI_VIDEO_570, /* 570 */ 4372 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4373 TPACPI_VIDEO_NEW, /* all others */ 4374 }; 4375 4376 enum { /* video status flags, based on VIDEO_570 */ 4377 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4378 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4379 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4380 }; 4381 4382 enum { /* TPACPI_VIDEO_570 constants */ 4383 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4384 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4385 * video_status_flags */ 4386 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4387 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4388 }; 4389 4390 static enum video_access_mode video_supported; 4391 static int video_orig_autosw; 4392 4393 static int video_autosw_get(void); 4394 static int video_autosw_set(int enable); 4395 4396 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4397 4398 static int __init video_init(struct ibm_init_struct *iibm) 4399 { 4400 int ivga; 4401 4402 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4403 4404 TPACPI_ACPIHANDLE_INIT(vid); 4405 TPACPI_ACPIHANDLE_INIT(vid2); 4406 4407 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4408 /* G41, assume IVGA doesn't change */ 4409 vid_handle = vid2_handle; 4410 4411 if (!vid_handle) 4412 /* video switching not supported on R30, R31 */ 4413 video_supported = TPACPI_VIDEO_NONE; 4414 else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4415 /* 570 */ 4416 video_supported = TPACPI_VIDEO_570; 4417 else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4418 /* 600e/x, 770e, 770x */ 4419 video_supported = TPACPI_VIDEO_770; 4420 else 4421 /* all others */ 4422 video_supported = TPACPI_VIDEO_NEW; 4423 4424 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4425 str_supported(video_supported != TPACPI_VIDEO_NONE), 4426 video_supported); 4427 4428 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1; 4429 } 4430 4431 static void video_exit(void) 4432 { 4433 dbg_printk(TPACPI_DBG_EXIT, 4434 "restoring original video autoswitch mode\n"); 4435 if (video_autosw_set(video_orig_autosw)) 4436 printk(TPACPI_ERR "error while trying to restore original " 4437 "video autoswitch mode\n"); 4438 } 4439 4440 static int video_outputsw_get(void) 4441 { 4442 int status = 0; 4443 int i; 4444 4445 switch (video_supported) { 4446 case TPACPI_VIDEO_570: 4447 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4448 TP_ACPI_VIDEO_570_PHSCMD)) 4449 return -EIO; 4450 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4451 break; 4452 case TPACPI_VIDEO_770: 4453 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4454 return -EIO; 4455 if (i) 4456 status |= TP_ACPI_VIDEO_S_LCD; 4457 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4458 return -EIO; 4459 if (i) 4460 status |= TP_ACPI_VIDEO_S_CRT; 4461 break; 4462 case TPACPI_VIDEO_NEW: 4463 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4464 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4465 return -EIO; 4466 if (i) 4467 status |= TP_ACPI_VIDEO_S_CRT; 4468 4469 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4470 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4471 return -EIO; 4472 if (i) 4473 status |= TP_ACPI_VIDEO_S_LCD; 4474 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4475 return -EIO; 4476 if (i) 4477 status |= TP_ACPI_VIDEO_S_DVI; 4478 break; 4479 default: 4480 return -ENOSYS; 4481 } 4482 4483 return status; 4484 } 4485 4486 static int video_outputsw_set(int status) 4487 { 4488 int autosw; 4489 int res = 0; 4490 4491 switch (video_supported) { 4492 case TPACPI_VIDEO_570: 4493 res = acpi_evalf(NULL, NULL, 4494 "\\_SB.PHS2", "vdd", 4495 TP_ACPI_VIDEO_570_PHS2CMD, 4496 status | TP_ACPI_VIDEO_570_PHS2SET); 4497 break; 4498 case TPACPI_VIDEO_770: 4499 autosw = video_autosw_get(); 4500 if (autosw < 0) 4501 return autosw; 4502 4503 res = video_autosw_set(1); 4504 if (res) 4505 return res; 4506 res = acpi_evalf(vid_handle, NULL, 4507 "ASWT", "vdd", status * 0x100, 0); 4508 if (!autosw && video_autosw_set(autosw)) { 4509 printk(TPACPI_ERR 4510 "video auto-switch left enabled due to error\n"); 4511 return -EIO; 4512 } 4513 break; 4514 case TPACPI_VIDEO_NEW: 4515 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4516 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4517 break; 4518 default: 4519 return -ENOSYS; 4520 } 4521 4522 return (res)? 0 : -EIO; 4523 } 4524 4525 static int video_autosw_get(void) 4526 { 4527 int autosw = 0; 4528 4529 switch (video_supported) { 4530 case TPACPI_VIDEO_570: 4531 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4532 return -EIO; 4533 break; 4534 case TPACPI_VIDEO_770: 4535 case TPACPI_VIDEO_NEW: 4536 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4537 return -EIO; 4538 break; 4539 default: 4540 return -ENOSYS; 4541 } 4542 4543 return autosw & 1; 4544 } 4545 4546 static int video_autosw_set(int enable) 4547 { 4548 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0)) 4549 return -EIO; 4550 return 0; 4551 } 4552 4553 static int video_outputsw_cycle(void) 4554 { 4555 int autosw = video_autosw_get(); 4556 int res; 4557 4558 if (autosw < 0) 4559 return autosw; 4560 4561 switch (video_supported) { 4562 case TPACPI_VIDEO_570: 4563 res = video_autosw_set(1); 4564 if (res) 4565 return res; 4566 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4567 break; 4568 case TPACPI_VIDEO_770: 4569 case TPACPI_VIDEO_NEW: 4570 res = video_autosw_set(1); 4571 if (res) 4572 return res; 4573 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4574 break; 4575 default: 4576 return -ENOSYS; 4577 } 4578 if (!autosw && video_autosw_set(autosw)) { 4579 printk(TPACPI_ERR 4580 "video auto-switch left enabled due to error\n"); 4581 return -EIO; 4582 } 4583 4584 return (res)? 0 : -EIO; 4585 } 4586 4587 static int video_expand_toggle(void) 4588 { 4589 switch (video_supported) { 4590 case TPACPI_VIDEO_570: 4591 return acpi_evalf(ec_handle, NULL, "_Q17", "v")? 4592 0 : -EIO; 4593 case TPACPI_VIDEO_770: 4594 return acpi_evalf(vid_handle, NULL, "VEXP", "v")? 4595 0 : -EIO; 4596 case TPACPI_VIDEO_NEW: 4597 return acpi_evalf(NULL, NULL, "\\VEXP", "v")? 4598 0 : -EIO; 4599 default: 4600 return -ENOSYS; 4601 } 4602 /* not reached */ 4603 } 4604 4605 static int video_read(char *p) 4606 { 4607 int status, autosw; 4608 int len = 0; 4609 4610 if (video_supported == TPACPI_VIDEO_NONE) { 4611 len += sprintf(p + len, "status:\t\tnot supported\n"); 4612 return len; 4613 } 4614 4615 status = video_outputsw_get(); 4616 if (status < 0) 4617 return status; 4618 4619 autosw = video_autosw_get(); 4620 if (autosw < 0) 4621 return autosw; 4622 4623 len += sprintf(p + len, "status:\t\tsupported\n"); 4624 len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0)); 4625 len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1)); 4626 if (video_supported == TPACPI_VIDEO_NEW) 4627 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3)); 4628 len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0)); 4629 len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n"); 4630 len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n"); 4631 if (video_supported == TPACPI_VIDEO_NEW) 4632 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n"); 4633 len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n"); 4634 len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n"); 4635 4636 return len; 4637 } 4638 4639 static int video_write(char *buf) 4640 { 4641 char *cmd; 4642 int enable, disable, status; 4643 int res; 4644 4645 if (video_supported == TPACPI_VIDEO_NONE) 4646 return -ENODEV; 4647 4648 enable = 0; 4649 disable = 0; 4650 4651 while ((cmd = next_cmd(&buf))) { 4652 if (strlencmp(cmd, "lcd_enable") == 0) { 4653 enable |= TP_ACPI_VIDEO_S_LCD; 4654 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4655 disable |= TP_ACPI_VIDEO_S_LCD; 4656 } else if (strlencmp(cmd, "crt_enable") == 0) { 4657 enable |= TP_ACPI_VIDEO_S_CRT; 4658 } else if (strlencmp(cmd, "crt_disable") == 0) { 4659 disable |= TP_ACPI_VIDEO_S_CRT; 4660 } else if (video_supported == TPACPI_VIDEO_NEW && 4661 strlencmp(cmd, "dvi_enable") == 0) { 4662 enable |= TP_ACPI_VIDEO_S_DVI; 4663 } else if (video_supported == TPACPI_VIDEO_NEW && 4664 strlencmp(cmd, "dvi_disable") == 0) { 4665 disable |= TP_ACPI_VIDEO_S_DVI; 4666 } else if (strlencmp(cmd, "auto_enable") == 0) { 4667 res = video_autosw_set(1); 4668 if (res) 4669 return res; 4670 } else if (strlencmp(cmd, "auto_disable") == 0) { 4671 res = video_autosw_set(0); 4672 if (res) 4673 return res; 4674 } else if (strlencmp(cmd, "video_switch") == 0) { 4675 res = video_outputsw_cycle(); 4676 if (res) 4677 return res; 4678 } else if (strlencmp(cmd, "expand_toggle") == 0) { 4679 res = video_expand_toggle(); 4680 if (res) 4681 return res; 4682 } else 4683 return -EINVAL; 4684 } 4685 4686 if (enable || disable) { 4687 status = video_outputsw_get(); 4688 if (status < 0) 4689 return status; 4690 res = video_outputsw_set((status & ~disable) | enable); 4691 if (res) 4692 return res; 4693 } 4694 4695 return 0; 4696 } 4697 4698 static struct ibm_struct video_driver_data = { 4699 .name = "video", 4700 .read = video_read, 4701 .write = video_write, 4702 .exit = video_exit, 4703 }; 4704 4705 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 4706 4707 /************************************************************************* 4708 * Light (thinklight) subdriver 4709 */ 4710 4711 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 4712 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 4713 4714 static int light_get_status(void) 4715 { 4716 int status = 0; 4717 4718 if (tp_features.light_status) { 4719 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 4720 return -EIO; 4721 return (!!status); 4722 } 4723 4724 return -ENXIO; 4725 } 4726 4727 static int light_set_status(int status) 4728 { 4729 int rc; 4730 4731 if (tp_features.light) { 4732 if (cmos_handle) { 4733 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 4734 (status)? 4735 TP_CMOS_THINKLIGHT_ON : 4736 TP_CMOS_THINKLIGHT_OFF); 4737 } else { 4738 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 4739 (status)? 1 : 0); 4740 } 4741 return (rc)? 0 : -EIO; 4742 } 4743 4744 return -ENXIO; 4745 } 4746 4747 static void light_set_status_worker(struct work_struct *work) 4748 { 4749 struct tpacpi_led_classdev *data = 4750 container_of(work, struct tpacpi_led_classdev, work); 4751 4752 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 4753 light_set_status((data->new_state != TPACPI_LED_OFF)); 4754 } 4755 4756 static void light_sysfs_set(struct led_classdev *led_cdev, 4757 enum led_brightness brightness) 4758 { 4759 struct tpacpi_led_classdev *data = 4760 container_of(led_cdev, 4761 struct tpacpi_led_classdev, 4762 led_classdev); 4763 data->new_state = (brightness != LED_OFF) ? 4764 TPACPI_LED_ON : TPACPI_LED_OFF; 4765 queue_work(tpacpi_wq, &data->work); 4766 } 4767 4768 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 4769 { 4770 return (light_get_status() == 1)? LED_FULL : LED_OFF; 4771 } 4772 4773 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 4774 .led_classdev = { 4775 .name = "tpacpi::thinklight", 4776 .brightness_set = &light_sysfs_set, 4777 .brightness_get = &light_sysfs_get, 4778 } 4779 }; 4780 4781 static int __init light_init(struct ibm_init_struct *iibm) 4782 { 4783 int rc; 4784 4785 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 4786 4787 TPACPI_ACPIHANDLE_INIT(ledb); 4788 TPACPI_ACPIHANDLE_INIT(lght); 4789 TPACPI_ACPIHANDLE_INIT(cmos); 4790 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 4791 4792 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 4793 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 4794 4795 if (tp_features.light) 4796 /* light status not supported on 4797 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 4798 tp_features.light_status = 4799 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 4800 4801 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 4802 str_supported(tp_features.light), 4803 str_supported(tp_features.light_status)); 4804 4805 if (!tp_features.light) 4806 return 1; 4807 4808 rc = led_classdev_register(&tpacpi_pdev->dev, 4809 &tpacpi_led_thinklight.led_classdev); 4810 4811 if (rc < 0) { 4812 tp_features.light = 0; 4813 tp_features.light_status = 0; 4814 } else { 4815 rc = 0; 4816 } 4817 4818 return rc; 4819 } 4820 4821 static void light_exit(void) 4822 { 4823 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 4824 if (work_pending(&tpacpi_led_thinklight.work)) 4825 flush_workqueue(tpacpi_wq); 4826 } 4827 4828 static int light_read(char *p) 4829 { 4830 int len = 0; 4831 int status; 4832 4833 if (!tp_features.light) { 4834 len += sprintf(p + len, "status:\t\tnot supported\n"); 4835 } else if (!tp_features.light_status) { 4836 len += sprintf(p + len, "status:\t\tunknown\n"); 4837 len += sprintf(p + len, "commands:\ton, off\n"); 4838 } else { 4839 status = light_get_status(); 4840 if (status < 0) 4841 return status; 4842 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0)); 4843 len += sprintf(p + len, "commands:\ton, off\n"); 4844 } 4845 4846 return len; 4847 } 4848 4849 static int light_write(char *buf) 4850 { 4851 char *cmd; 4852 int newstatus = 0; 4853 4854 if (!tp_features.light) 4855 return -ENODEV; 4856 4857 while ((cmd = next_cmd(&buf))) { 4858 if (strlencmp(cmd, "on") == 0) { 4859 newstatus = 1; 4860 } else if (strlencmp(cmd, "off") == 0) { 4861 newstatus = 0; 4862 } else 4863 return -EINVAL; 4864 } 4865 4866 return light_set_status(newstatus); 4867 } 4868 4869 static struct ibm_struct light_driver_data = { 4870 .name = "light", 4871 .read = light_read, 4872 .write = light_write, 4873 .exit = light_exit, 4874 }; 4875 4876 /************************************************************************* 4877 * CMOS subdriver 4878 */ 4879 4880 /* sysfs cmos_command -------------------------------------------------- */ 4881 static ssize_t cmos_command_store(struct device *dev, 4882 struct device_attribute *attr, 4883 const char *buf, size_t count) 4884 { 4885 unsigned long cmos_cmd; 4886 int res; 4887 4888 if (parse_strtoul(buf, 21, &cmos_cmd)) 4889 return -EINVAL; 4890 4891 res = issue_thinkpad_cmos_command(cmos_cmd); 4892 return (res)? res : count; 4893 } 4894 4895 static struct device_attribute dev_attr_cmos_command = 4896 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store); 4897 4898 /* --------------------------------------------------------------------- */ 4899 4900 static int __init cmos_init(struct ibm_init_struct *iibm) 4901 { 4902 int res; 4903 4904 vdbg_printk(TPACPI_DBG_INIT, 4905 "initializing cmos commands subdriver\n"); 4906 4907 TPACPI_ACPIHANDLE_INIT(cmos); 4908 4909 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 4910 str_supported(cmos_handle != NULL)); 4911 4912 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4913 if (res) 4914 return res; 4915 4916 return (cmos_handle)? 0 : 1; 4917 } 4918 4919 static void cmos_exit(void) 4920 { 4921 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4922 } 4923 4924 static int cmos_read(char *p) 4925 { 4926 int len = 0; 4927 4928 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4929 R30, R31, T20-22, X20-21 */ 4930 if (!cmos_handle) 4931 len += sprintf(p + len, "status:\t\tnot supported\n"); 4932 else { 4933 len += sprintf(p + len, "status:\t\tsupported\n"); 4934 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n"); 4935 } 4936 4937 return len; 4938 } 4939 4940 static int cmos_write(char *buf) 4941 { 4942 char *cmd; 4943 int cmos_cmd, res; 4944 4945 while ((cmd = next_cmd(&buf))) { 4946 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 4947 cmos_cmd >= 0 && cmos_cmd <= 21) { 4948 /* cmos_cmd set */ 4949 } else 4950 return -EINVAL; 4951 4952 res = issue_thinkpad_cmos_command(cmos_cmd); 4953 if (res) 4954 return res; 4955 } 4956 4957 return 0; 4958 } 4959 4960 static struct ibm_struct cmos_driver_data = { 4961 .name = "cmos", 4962 .read = cmos_read, 4963 .write = cmos_write, 4964 .exit = cmos_exit, 4965 }; 4966 4967 /************************************************************************* 4968 * LED subdriver 4969 */ 4970 4971 enum led_access_mode { 4972 TPACPI_LED_NONE = 0, 4973 TPACPI_LED_570, /* 570 */ 4974 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 4975 TPACPI_LED_NEW, /* all others */ 4976 }; 4977 4978 enum { /* For TPACPI_LED_OLD */ 4979 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 4980 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 4981 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 4982 }; 4983 4984 static enum led_access_mode led_supported; 4985 4986 TPACPI_HANDLE(led, ec, "SLED", /* 570 */ 4987 "SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */ 4988 /* T20-22, X20-21 */ 4989 "LED", /* all others */ 4990 ); /* R30, R31 */ 4991 4992 #define TPACPI_LED_NUMLEDS 16 4993 static struct tpacpi_led_classdev *tpacpi_leds; 4994 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 4995 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 4996 /* there's a limit of 19 chars + NULL before 2.6.26 */ 4997 "tpacpi::power", 4998 "tpacpi:orange:batt", 4999 "tpacpi:green:batt", 5000 "tpacpi::dock_active", 5001 "tpacpi::bay_active", 5002 "tpacpi::dock_batt", 5003 "tpacpi::unknown_led", 5004 "tpacpi::standby", 5005 "tpacpi::dock_status1", 5006 "tpacpi::dock_status2", 5007 "tpacpi::unknown_led2", 5008 "tpacpi::unknown_led3", 5009 "tpacpi::thinkvantage", 5010 }; 5011 #define TPACPI_SAFE_LEDS 0x1081U 5012 5013 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5014 { 5015 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5016 return false; 5017 #else 5018 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5019 #endif 5020 } 5021 5022 static int led_get_status(const unsigned int led) 5023 { 5024 int status; 5025 enum led_status_t led_s; 5026 5027 switch (led_supported) { 5028 case TPACPI_LED_570: 5029 if (!acpi_evalf(ec_handle, 5030 &status, "GLED", "dd", 1 << led)) 5031 return -EIO; 5032 led_s = (status == 0)? 5033 TPACPI_LED_OFF : 5034 ((status == 1)? 5035 TPACPI_LED_ON : 5036 TPACPI_LED_BLINK); 5037 tpacpi_led_state_cache[led] = led_s; 5038 return led_s; 5039 default: 5040 return -ENXIO; 5041 } 5042 5043 /* not reached */ 5044 } 5045 5046 static int led_set_status(const unsigned int led, 5047 const enum led_status_t ledstatus) 5048 { 5049 /* off, on, blink. Index is led_status_t */ 5050 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5051 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5052 5053 int rc = 0; 5054 5055 switch (led_supported) { 5056 case TPACPI_LED_570: 5057 /* 570 */ 5058 if (unlikely(led > 7)) 5059 return -EINVAL; 5060 if (unlikely(tpacpi_is_led_restricted(led))) 5061 return -EPERM; 5062 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5063 (1 << led), led_sled_arg1[ledstatus])) 5064 rc = -EIO; 5065 break; 5066 case TPACPI_LED_OLD: 5067 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5068 if (unlikely(led > 7)) 5069 return -EINVAL; 5070 if (unlikely(tpacpi_is_led_restricted(led))) 5071 return -EPERM; 5072 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5073 if (rc >= 0) 5074 rc = ec_write(TPACPI_LED_EC_HLBL, 5075 (ledstatus == TPACPI_LED_BLINK) << led); 5076 if (rc >= 0) 5077 rc = ec_write(TPACPI_LED_EC_HLCL, 5078 (ledstatus != TPACPI_LED_OFF) << led); 5079 break; 5080 case TPACPI_LED_NEW: 5081 /* all others */ 5082 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5083 return -EINVAL; 5084 if (unlikely(tpacpi_is_led_restricted(led))) 5085 return -EPERM; 5086 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5087 led, led_led_arg1[ledstatus])) 5088 rc = -EIO; 5089 break; 5090 default: 5091 rc = -ENXIO; 5092 } 5093 5094 if (!rc) 5095 tpacpi_led_state_cache[led] = ledstatus; 5096 5097 return rc; 5098 } 5099 5100 static void led_set_status_worker(struct work_struct *work) 5101 { 5102 struct tpacpi_led_classdev *data = 5103 container_of(work, struct tpacpi_led_classdev, work); 5104 5105 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5106 led_set_status(data->led, data->new_state); 5107 } 5108 5109 static void led_sysfs_set(struct led_classdev *led_cdev, 5110 enum led_brightness brightness) 5111 { 5112 struct tpacpi_led_classdev *data = container_of(led_cdev, 5113 struct tpacpi_led_classdev, led_classdev); 5114 5115 if (brightness == LED_OFF) 5116 data->new_state = TPACPI_LED_OFF; 5117 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5118 data->new_state = TPACPI_LED_ON; 5119 else 5120 data->new_state = TPACPI_LED_BLINK; 5121 5122 queue_work(tpacpi_wq, &data->work); 5123 } 5124 5125 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5126 unsigned long *delay_on, unsigned long *delay_off) 5127 { 5128 struct tpacpi_led_classdev *data = container_of(led_cdev, 5129 struct tpacpi_led_classdev, led_classdev); 5130 5131 /* Can we choose the flash rate? */ 5132 if (*delay_on == 0 && *delay_off == 0) { 5133 /* yes. set them to the hardware blink rate (1 Hz) */ 5134 *delay_on = 500; /* ms */ 5135 *delay_off = 500; /* ms */ 5136 } else if ((*delay_on != 500) || (*delay_off != 500)) 5137 return -EINVAL; 5138 5139 data->new_state = TPACPI_LED_BLINK; 5140 queue_work(tpacpi_wq, &data->work); 5141 5142 return 0; 5143 } 5144 5145 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5146 { 5147 int rc; 5148 5149 struct tpacpi_led_classdev *data = container_of(led_cdev, 5150 struct tpacpi_led_classdev, led_classdev); 5151 5152 rc = led_get_status(data->led); 5153 5154 if (rc == TPACPI_LED_OFF || rc < 0) 5155 rc = LED_OFF; /* no error handling in led class :( */ 5156 else 5157 rc = LED_FULL; 5158 5159 return rc; 5160 } 5161 5162 static void led_exit(void) 5163 { 5164 unsigned int i; 5165 5166 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5167 if (tpacpi_leds[i].led_classdev.name) 5168 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5169 } 5170 5171 kfree(tpacpi_leds); 5172 } 5173 5174 static int __init tpacpi_init_led(unsigned int led) 5175 { 5176 int rc; 5177 5178 tpacpi_leds[led].led = led; 5179 5180 /* LEDs with no name don't get registered */ 5181 if (!tpacpi_led_names[led]) 5182 return 0; 5183 5184 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5185 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5186 if (led_supported == TPACPI_LED_570) 5187 tpacpi_leds[led].led_classdev.brightness_get = 5188 &led_sysfs_get; 5189 5190 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5191 5192 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5193 5194 rc = led_classdev_register(&tpacpi_pdev->dev, 5195 &tpacpi_leds[led].led_classdev); 5196 if (rc < 0) 5197 tpacpi_leds[led].led_classdev.name = NULL; 5198 5199 return rc; 5200 } 5201 5202 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5203 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5204 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5205 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5206 5207 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5208 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5209 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5210 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5211 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5212 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5213 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5214 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5215 5216 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5217 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5218 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5219 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5220 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5221 5222 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5223 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5224 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5225 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5226 5227 /* (1) - may have excess leds enabled on MSB */ 5228 5229 /* Defaults (order matters, keep last, don't reorder!) */ 5230 { /* Lenovo */ 5231 .vendor = PCI_VENDOR_ID_LENOVO, 5232 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5233 .quirks = 0x1fffU, 5234 }, 5235 { /* IBM ThinkPads with no EC version string */ 5236 .vendor = PCI_VENDOR_ID_IBM, 5237 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5238 .quirks = 0x00ffU, 5239 }, 5240 { /* IBM ThinkPads with EC version string */ 5241 .vendor = PCI_VENDOR_ID_IBM, 5242 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5243 .quirks = 0x00bfU, 5244 }, 5245 }; 5246 5247 #undef TPACPI_LEDQ_IBM 5248 #undef TPACPI_LEDQ_LNV 5249 5250 static int __init led_init(struct ibm_init_struct *iibm) 5251 { 5252 unsigned int i; 5253 int rc; 5254 unsigned long useful_leds; 5255 5256 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5257 5258 TPACPI_ACPIHANDLE_INIT(led); 5259 5260 if (!led_handle) 5261 /* led not supported on R30, R31 */ 5262 led_supported = TPACPI_LED_NONE; 5263 else if (strlencmp(led_path, "SLED") == 0) 5264 /* 570 */ 5265 led_supported = TPACPI_LED_570; 5266 else if (strlencmp(led_path, "SYSL") == 0) 5267 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5268 led_supported = TPACPI_LED_OLD; 5269 else 5270 /* all others */ 5271 led_supported = TPACPI_LED_NEW; 5272 5273 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5274 str_supported(led_supported), led_supported); 5275 5276 if (led_supported == TPACPI_LED_NONE) 5277 return 1; 5278 5279 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5280 GFP_KERNEL); 5281 if (!tpacpi_leds) { 5282 printk(TPACPI_ERR "Out of memory for LED data\n"); 5283 return -ENOMEM; 5284 } 5285 5286 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5287 ARRAY_SIZE(led_useful_qtable)); 5288 5289 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5290 if (!tpacpi_is_led_restricted(i) && 5291 test_bit(i, &useful_leds)) { 5292 rc = tpacpi_init_led(i); 5293 if (rc < 0) { 5294 led_exit(); 5295 return rc; 5296 } 5297 } 5298 } 5299 5300 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5301 printk(TPACPI_NOTICE 5302 "warning: userspace override of important " 5303 "firmware LEDs is enabled\n"); 5304 #endif 5305 return 0; 5306 } 5307 5308 #define str_led_status(s) \ 5309 ((s) == TPACPI_LED_OFF ? "off" : \ 5310 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5311 5312 static int led_read(char *p) 5313 { 5314 int len = 0; 5315 5316 if (!led_supported) { 5317 len += sprintf(p + len, "status:\t\tnot supported\n"); 5318 return len; 5319 } 5320 len += sprintf(p + len, "status:\t\tsupported\n"); 5321 5322 if (led_supported == TPACPI_LED_570) { 5323 /* 570 */ 5324 int i, status; 5325 for (i = 0; i < 8; i++) { 5326 status = led_get_status(i); 5327 if (status < 0) 5328 return -EIO; 5329 len += sprintf(p + len, "%d:\t\t%s\n", 5330 i, str_led_status(status)); 5331 } 5332 } 5333 5334 len += sprintf(p + len, "commands:\t" 5335 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5336 5337 return len; 5338 } 5339 5340 static int led_write(char *buf) 5341 { 5342 char *cmd; 5343 int led, rc; 5344 enum led_status_t s; 5345 5346 if (!led_supported) 5347 return -ENODEV; 5348 5349 while ((cmd = next_cmd(&buf))) { 5350 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15) 5351 return -EINVAL; 5352 5353 if (strstr(cmd, "off")) { 5354 s = TPACPI_LED_OFF; 5355 } else if (strstr(cmd, "on")) { 5356 s = TPACPI_LED_ON; 5357 } else if (strstr(cmd, "blink")) { 5358 s = TPACPI_LED_BLINK; 5359 } else { 5360 return -EINVAL; 5361 } 5362 5363 rc = led_set_status(led, s); 5364 if (rc < 0) 5365 return rc; 5366 } 5367 5368 return 0; 5369 } 5370 5371 static struct ibm_struct led_driver_data = { 5372 .name = "led", 5373 .read = led_read, 5374 .write = led_write, 5375 .exit = led_exit, 5376 }; 5377 5378 /************************************************************************* 5379 * Beep subdriver 5380 */ 5381 5382 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5383 5384 #define TPACPI_BEEP_Q1 0x0001 5385 5386 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5387 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5388 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5389 }; 5390 5391 static int __init beep_init(struct ibm_init_struct *iibm) 5392 { 5393 unsigned long quirks; 5394 5395 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5396 5397 TPACPI_ACPIHANDLE_INIT(beep); 5398 5399 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5400 str_supported(beep_handle != NULL)); 5401 5402 quirks = tpacpi_check_quirks(beep_quirk_table, 5403 ARRAY_SIZE(beep_quirk_table)); 5404 5405 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5406 5407 return (beep_handle)? 0 : 1; 5408 } 5409 5410 static int beep_read(char *p) 5411 { 5412 int len = 0; 5413 5414 if (!beep_handle) 5415 len += sprintf(p + len, "status:\t\tnot supported\n"); 5416 else { 5417 len += sprintf(p + len, "status:\t\tsupported\n"); 5418 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5419 } 5420 5421 return len; 5422 } 5423 5424 static int beep_write(char *buf) 5425 { 5426 char *cmd; 5427 int beep_cmd; 5428 5429 if (!beep_handle) 5430 return -ENODEV; 5431 5432 while ((cmd = next_cmd(&buf))) { 5433 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 5434 beep_cmd >= 0 && beep_cmd <= 17) { 5435 /* beep_cmd set */ 5436 } else 5437 return -EINVAL; 5438 if (tp_features.beep_needs_two_args) { 5439 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 5440 beep_cmd, 0)) 5441 return -EIO; 5442 } else { 5443 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 5444 beep_cmd)) 5445 return -EIO; 5446 } 5447 } 5448 5449 return 0; 5450 } 5451 5452 static struct ibm_struct beep_driver_data = { 5453 .name = "beep", 5454 .read = beep_read, 5455 .write = beep_write, 5456 }; 5457 5458 /************************************************************************* 5459 * Thermal subdriver 5460 */ 5461 5462 enum thermal_access_mode { 5463 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 5464 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 5465 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 5466 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 5467 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 5468 }; 5469 5470 enum { /* TPACPI_THERMAL_TPEC_* */ 5471 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 5472 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 5473 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 5474 }; 5475 5476 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 5477 struct ibm_thermal_sensors_struct { 5478 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 5479 }; 5480 5481 static enum thermal_access_mode thermal_read_mode; 5482 5483 /* idx is zero-based */ 5484 static int thermal_get_sensor(int idx, s32 *value) 5485 { 5486 int t; 5487 s8 tmp; 5488 char tmpi[5]; 5489 5490 t = TP_EC_THERMAL_TMP0; 5491 5492 switch (thermal_read_mode) { 5493 #if TPACPI_MAX_THERMAL_SENSORS >= 16 5494 case TPACPI_THERMAL_TPEC_16: 5495 if (idx >= 8 && idx <= 15) { 5496 t = TP_EC_THERMAL_TMP8; 5497 idx -= 8; 5498 } 5499 /* fallthrough */ 5500 #endif 5501 case TPACPI_THERMAL_TPEC_8: 5502 if (idx <= 7) { 5503 if (!acpi_ec_read(t + idx, &tmp)) 5504 return -EIO; 5505 *value = tmp * 1000; 5506 return 0; 5507 } 5508 break; 5509 5510 case TPACPI_THERMAL_ACPI_UPDT: 5511 if (idx <= 7) { 5512 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5513 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 5514 return -EIO; 5515 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5516 return -EIO; 5517 *value = (t - 2732) * 100; 5518 return 0; 5519 } 5520 break; 5521 5522 case TPACPI_THERMAL_ACPI_TMP07: 5523 if (idx <= 7) { 5524 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5525 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5526 return -EIO; 5527 if (t > 127 || t < -127) 5528 t = TP_EC_THERMAL_TMP_NA; 5529 *value = t * 1000; 5530 return 0; 5531 } 5532 break; 5533 5534 case TPACPI_THERMAL_NONE: 5535 default: 5536 return -ENOSYS; 5537 } 5538 5539 return -EINVAL; 5540 } 5541 5542 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 5543 { 5544 int res, i; 5545 int n; 5546 5547 n = 8; 5548 i = 0; 5549 5550 if (!s) 5551 return -EINVAL; 5552 5553 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 5554 n = 16; 5555 5556 for (i = 0 ; i < n; i++) { 5557 res = thermal_get_sensor(i, &s->temp[i]); 5558 if (res) 5559 return res; 5560 } 5561 5562 return n; 5563 } 5564 5565 /* sysfs temp##_input -------------------------------------------------- */ 5566 5567 static ssize_t thermal_temp_input_show(struct device *dev, 5568 struct device_attribute *attr, 5569 char *buf) 5570 { 5571 struct sensor_device_attribute *sensor_attr = 5572 to_sensor_dev_attr(attr); 5573 int idx = sensor_attr->index; 5574 s32 value; 5575 int res; 5576 5577 res = thermal_get_sensor(idx, &value); 5578 if (res) 5579 return res; 5580 if (value == TP_EC_THERMAL_TMP_NA * 1000) 5581 return -ENXIO; 5582 5583 return snprintf(buf, PAGE_SIZE, "%d\n", value); 5584 } 5585 5586 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 5587 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 5588 thermal_temp_input_show, NULL, _idxB) 5589 5590 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 5591 THERMAL_SENSOR_ATTR_TEMP(1, 0), 5592 THERMAL_SENSOR_ATTR_TEMP(2, 1), 5593 THERMAL_SENSOR_ATTR_TEMP(3, 2), 5594 THERMAL_SENSOR_ATTR_TEMP(4, 3), 5595 THERMAL_SENSOR_ATTR_TEMP(5, 4), 5596 THERMAL_SENSOR_ATTR_TEMP(6, 5), 5597 THERMAL_SENSOR_ATTR_TEMP(7, 6), 5598 THERMAL_SENSOR_ATTR_TEMP(8, 7), 5599 THERMAL_SENSOR_ATTR_TEMP(9, 8), 5600 THERMAL_SENSOR_ATTR_TEMP(10, 9), 5601 THERMAL_SENSOR_ATTR_TEMP(11, 10), 5602 THERMAL_SENSOR_ATTR_TEMP(12, 11), 5603 THERMAL_SENSOR_ATTR_TEMP(13, 12), 5604 THERMAL_SENSOR_ATTR_TEMP(14, 13), 5605 THERMAL_SENSOR_ATTR_TEMP(15, 14), 5606 THERMAL_SENSOR_ATTR_TEMP(16, 15), 5607 }; 5608 5609 #define THERMAL_ATTRS(X) \ 5610 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 5611 5612 static struct attribute *thermal_temp_input_attr[] = { 5613 THERMAL_ATTRS(8), 5614 THERMAL_ATTRS(9), 5615 THERMAL_ATTRS(10), 5616 THERMAL_ATTRS(11), 5617 THERMAL_ATTRS(12), 5618 THERMAL_ATTRS(13), 5619 THERMAL_ATTRS(14), 5620 THERMAL_ATTRS(15), 5621 THERMAL_ATTRS(0), 5622 THERMAL_ATTRS(1), 5623 THERMAL_ATTRS(2), 5624 THERMAL_ATTRS(3), 5625 THERMAL_ATTRS(4), 5626 THERMAL_ATTRS(5), 5627 THERMAL_ATTRS(6), 5628 THERMAL_ATTRS(7), 5629 NULL 5630 }; 5631 5632 static const struct attribute_group thermal_temp_input16_group = { 5633 .attrs = thermal_temp_input_attr 5634 }; 5635 5636 static const struct attribute_group thermal_temp_input8_group = { 5637 .attrs = &thermal_temp_input_attr[8] 5638 }; 5639 5640 #undef THERMAL_SENSOR_ATTR_TEMP 5641 #undef THERMAL_ATTRS 5642 5643 /* --------------------------------------------------------------------- */ 5644 5645 static int __init thermal_init(struct ibm_init_struct *iibm) 5646 { 5647 u8 t, ta1, ta2; 5648 int i; 5649 int acpi_tmp7; 5650 int res; 5651 5652 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 5653 5654 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 5655 5656 if (thinkpad_id.ec_model) { 5657 /* 5658 * Direct EC access mode: sensors at registers 5659 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 5660 * non-implemented, thermal sensors return 0x80 when 5661 * not available 5662 */ 5663 5664 ta1 = ta2 = 0; 5665 for (i = 0; i < 8; i++) { 5666 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 5667 ta1 |= t; 5668 } else { 5669 ta1 = 0; 5670 break; 5671 } 5672 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 5673 ta2 |= t; 5674 } else { 5675 ta1 = 0; 5676 break; 5677 } 5678 } 5679 if (ta1 == 0) { 5680 /* This is sheer paranoia, but we handle it anyway */ 5681 if (acpi_tmp7) { 5682 printk(TPACPI_ERR 5683 "ThinkPad ACPI EC access misbehaving, " 5684 "falling back to ACPI TMPx access " 5685 "mode\n"); 5686 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5687 } else { 5688 printk(TPACPI_ERR 5689 "ThinkPad ACPI EC access misbehaving, " 5690 "disabling thermal sensors access\n"); 5691 thermal_read_mode = TPACPI_THERMAL_NONE; 5692 } 5693 } else { 5694 thermal_read_mode = 5695 (ta2 != 0) ? 5696 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 5697 } 5698 } else if (acpi_tmp7) { 5699 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 5700 /* 600e/x, 770e, 770x */ 5701 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 5702 } else { 5703 /* Standard ACPI TMPx access, max 8 sensors */ 5704 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5705 } 5706 } else { 5707 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 5708 thermal_read_mode = TPACPI_THERMAL_NONE; 5709 } 5710 5711 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 5712 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 5713 thermal_read_mode); 5714 5715 switch (thermal_read_mode) { 5716 case TPACPI_THERMAL_TPEC_16: 5717 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5718 &thermal_temp_input16_group); 5719 if (res) 5720 return res; 5721 break; 5722 case TPACPI_THERMAL_TPEC_8: 5723 case TPACPI_THERMAL_ACPI_TMP07: 5724 case TPACPI_THERMAL_ACPI_UPDT: 5725 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5726 &thermal_temp_input8_group); 5727 if (res) 5728 return res; 5729 break; 5730 case TPACPI_THERMAL_NONE: 5731 default: 5732 return 1; 5733 } 5734 5735 return 0; 5736 } 5737 5738 static void thermal_exit(void) 5739 { 5740 switch (thermal_read_mode) { 5741 case TPACPI_THERMAL_TPEC_16: 5742 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5743 &thermal_temp_input16_group); 5744 break; 5745 case TPACPI_THERMAL_TPEC_8: 5746 case TPACPI_THERMAL_ACPI_TMP07: 5747 case TPACPI_THERMAL_ACPI_UPDT: 5748 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5749 &thermal_temp_input16_group); 5750 break; 5751 case TPACPI_THERMAL_NONE: 5752 default: 5753 break; 5754 } 5755 } 5756 5757 static int thermal_read(char *p) 5758 { 5759 int len = 0; 5760 int n, i; 5761 struct ibm_thermal_sensors_struct t; 5762 5763 n = thermal_get_sensors(&t); 5764 if (unlikely(n < 0)) 5765 return n; 5766 5767 len += sprintf(p + len, "temperatures:\t"); 5768 5769 if (n > 0) { 5770 for (i = 0; i < (n - 1); i++) 5771 len += sprintf(p + len, "%d ", t.temp[i] / 1000); 5772 len += sprintf(p + len, "%d\n", t.temp[i] / 1000); 5773 } else 5774 len += sprintf(p + len, "not supported\n"); 5775 5776 return len; 5777 } 5778 5779 static struct ibm_struct thermal_driver_data = { 5780 .name = "thermal", 5781 .read = thermal_read, 5782 .exit = thermal_exit, 5783 }; 5784 5785 /************************************************************************* 5786 * EC Dump subdriver 5787 */ 5788 5789 static u8 ecdump_regs[256]; 5790 5791 static int ecdump_read(char *p) 5792 { 5793 int len = 0; 5794 int i, j; 5795 u8 v; 5796 5797 len += sprintf(p + len, "EC " 5798 " +00 +01 +02 +03 +04 +05 +06 +07" 5799 " +08 +09 +0a +0b +0c +0d +0e +0f\n"); 5800 for (i = 0; i < 256; i += 16) { 5801 len += sprintf(p + len, "EC 0x%02x:", i); 5802 for (j = 0; j < 16; j++) { 5803 if (!acpi_ec_read(i + j, &v)) 5804 break; 5805 if (v != ecdump_regs[i + j]) 5806 len += sprintf(p + len, " *%02x", v); 5807 else 5808 len += sprintf(p + len, " %02x", v); 5809 ecdump_regs[i + j] = v; 5810 } 5811 len += sprintf(p + len, "\n"); 5812 if (j != 16) 5813 break; 5814 } 5815 5816 /* These are way too dangerous to advertise openly... */ 5817 #if 0 5818 len += sprintf(p + len, "commands:\t0x<offset> 0x<value>" 5819 " (<offset> is 00-ff, <value> is 00-ff)\n"); 5820 len += sprintf(p + len, "commands:\t0x<offset> <value> " 5821 " (<offset> is 00-ff, <value> is 0-255)\n"); 5822 #endif 5823 return len; 5824 } 5825 5826 static int ecdump_write(char *buf) 5827 { 5828 char *cmd; 5829 int i, v; 5830 5831 while ((cmd = next_cmd(&buf))) { 5832 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) { 5833 /* i and v set */ 5834 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) { 5835 /* i and v set */ 5836 } else 5837 return -EINVAL; 5838 if (i >= 0 && i < 256 && v >= 0 && v < 256) { 5839 if (!acpi_ec_write(i, v)) 5840 return -EIO; 5841 } else 5842 return -EINVAL; 5843 } 5844 5845 return 0; 5846 } 5847 5848 static struct ibm_struct ecdump_driver_data = { 5849 .name = "ecdump", 5850 .read = ecdump_read, 5851 .write = ecdump_write, 5852 .flags.experimental = 1, 5853 }; 5854 5855 /************************************************************************* 5856 * Backlight/brightness subdriver 5857 */ 5858 5859 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 5860 5861 /* 5862 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 5863 * CMOS NVRAM byte 0x5E, bits 0-3. 5864 * 5865 * EC HBRV (0x31) has the following layout 5866 * Bit 7: unknown function 5867 * Bit 6: unknown function 5868 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 5869 * Bit 4: must be set to zero to avoid problems 5870 * Bit 3-0: backlight brightness level 5871 * 5872 * brightness_get_raw returns status data in the HBRV layout 5873 * 5874 * WARNING: The X61 has been verified to use HBRV for something else, so 5875 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 5876 * testing on the very early *60 Lenovo models... 5877 */ 5878 5879 enum { 5880 TP_EC_BACKLIGHT = 0x31, 5881 5882 /* TP_EC_BACKLIGHT bitmasks */ 5883 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 5884 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 5885 TP_EC_BACKLIGHT_MAPSW = 0x20, 5886 }; 5887 5888 enum tpacpi_brightness_access_mode { 5889 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 5890 TPACPI_BRGHT_MODE_EC, /* EC control */ 5891 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 5892 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 5893 TPACPI_BRGHT_MODE_MAX 5894 }; 5895 5896 static struct backlight_device *ibm_backlight_device; 5897 5898 static enum tpacpi_brightness_access_mode brightness_mode = 5899 TPACPI_BRGHT_MODE_MAX; 5900 5901 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 5902 5903 static struct mutex brightness_mutex; 5904 5905 /* NVRAM brightness access, 5906 * call with brightness_mutex held! */ 5907 static unsigned int tpacpi_brightness_nvram_get(void) 5908 { 5909 u8 lnvram; 5910 5911 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 5912 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5913 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 5914 lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07; 5915 5916 return lnvram; 5917 } 5918 5919 static void tpacpi_brightness_checkpoint_nvram(void) 5920 { 5921 u8 lec = 0; 5922 u8 b_nvram; 5923 5924 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 5925 return; 5926 5927 vdbg_printk(TPACPI_DBG_BRGHT, 5928 "trying to checkpoint backlight level to NVRAM...\n"); 5929 5930 if (mutex_lock_killable(&brightness_mutex) < 0) 5931 return; 5932 5933 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5934 goto unlock; 5935 lec &= TP_EC_BACKLIGHT_LVLMSK; 5936 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 5937 5938 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5939 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 5940 /* NVRAM needs update */ 5941 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 5942 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 5943 b_nvram |= lec; 5944 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 5945 dbg_printk(TPACPI_DBG_BRGHT, 5946 "updated NVRAM backlight level to %u (0x%02x)\n", 5947 (unsigned int) lec, (unsigned int) b_nvram); 5948 } else 5949 vdbg_printk(TPACPI_DBG_BRGHT, 5950 "NVRAM backlight level already is %u (0x%02x)\n", 5951 (unsigned int) lec, (unsigned int) b_nvram); 5952 5953 unlock: 5954 mutex_unlock(&brightness_mutex); 5955 } 5956 5957 5958 /* call with brightness_mutex held! */ 5959 static int tpacpi_brightness_get_raw(int *status) 5960 { 5961 u8 lec = 0; 5962 5963 switch (brightness_mode) { 5964 case TPACPI_BRGHT_MODE_UCMS_STEP: 5965 *status = tpacpi_brightness_nvram_get(); 5966 return 0; 5967 case TPACPI_BRGHT_MODE_EC: 5968 case TPACPI_BRGHT_MODE_ECNVRAM: 5969 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5970 return -EIO; 5971 *status = lec; 5972 return 0; 5973 default: 5974 return -ENXIO; 5975 } 5976 } 5977 5978 /* call with brightness_mutex held! */ 5979 /* do NOT call with illegal backlight level value */ 5980 static int tpacpi_brightness_set_ec(unsigned int value) 5981 { 5982 u8 lec = 0; 5983 5984 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5985 return -EIO; 5986 5987 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 5988 (lec & TP_EC_BACKLIGHT_CMDMSK) | 5989 (value & TP_EC_BACKLIGHT_LVLMSK)))) 5990 return -EIO; 5991 5992 return 0; 5993 } 5994 5995 /* call with brightness_mutex held! */ 5996 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 5997 { 5998 int cmos_cmd, inc; 5999 unsigned int current_value, i; 6000 6001 current_value = tpacpi_brightness_nvram_get(); 6002 6003 if (value == current_value) 6004 return 0; 6005 6006 cmos_cmd = (value > current_value) ? 6007 TP_CMOS_BRIGHTNESS_UP : 6008 TP_CMOS_BRIGHTNESS_DOWN; 6009 inc = (value > current_value) ? 1 : -1; 6010 6011 for (i = current_value; i != value; i += inc) 6012 if (issue_thinkpad_cmos_command(cmos_cmd)) 6013 return -EIO; 6014 6015 return 0; 6016 } 6017 6018 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6019 static int brightness_set(unsigned int value) 6020 { 6021 int res; 6022 6023 if (value > ((tp_features.bright_16levels)? 15 : 7) || 6024 value < 0) 6025 return -EINVAL; 6026 6027 vdbg_printk(TPACPI_DBG_BRGHT, 6028 "set backlight level to %d\n", value); 6029 6030 res = mutex_lock_killable(&brightness_mutex); 6031 if (res < 0) 6032 return res; 6033 6034 switch (brightness_mode) { 6035 case TPACPI_BRGHT_MODE_EC: 6036 case TPACPI_BRGHT_MODE_ECNVRAM: 6037 res = tpacpi_brightness_set_ec(value); 6038 break; 6039 case TPACPI_BRGHT_MODE_UCMS_STEP: 6040 res = tpacpi_brightness_set_ucmsstep(value); 6041 break; 6042 default: 6043 res = -ENXIO; 6044 } 6045 6046 mutex_unlock(&brightness_mutex); 6047 return res; 6048 } 6049 6050 /* sysfs backlight class ----------------------------------------------- */ 6051 6052 static int brightness_update_status(struct backlight_device *bd) 6053 { 6054 unsigned int level = 6055 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6056 bd->props.power == FB_BLANK_UNBLANK) ? 6057 bd->props.brightness : 0; 6058 6059 dbg_printk(TPACPI_DBG_BRGHT, 6060 "backlight: attempt to set level to %d\n", 6061 level); 6062 6063 /* it is the backlight class's job (caller) to handle 6064 * EINTR and other errors properly */ 6065 return brightness_set(level); 6066 } 6067 6068 static int brightness_get(struct backlight_device *bd) 6069 { 6070 int status, res; 6071 6072 res = mutex_lock_killable(&brightness_mutex); 6073 if (res < 0) 6074 return 0; 6075 6076 res = tpacpi_brightness_get_raw(&status); 6077 6078 mutex_unlock(&brightness_mutex); 6079 6080 if (res < 0) 6081 return 0; 6082 6083 return status & TP_EC_BACKLIGHT_LVLMSK; 6084 } 6085 6086 static struct backlight_ops ibm_backlight_data = { 6087 .get_brightness = brightness_get, 6088 .update_status = brightness_update_status, 6089 }; 6090 6091 /* --------------------------------------------------------------------- */ 6092 6093 /* 6094 * These are only useful for models that have only one possibility 6095 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6096 * these quirks. 6097 */ 6098 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6099 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6100 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6101 6102 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6103 /* Models with ATI GPUs known to require ECNVRAM mode */ 6104 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6105 6106 /* Models with ATI GPUs that can use ECNVRAM */ 6107 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), 6108 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6109 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6110 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6111 6112 /* Models with Intel Extreme Graphics 2 */ 6113 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), 6114 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC), 6115 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC), 6116 6117 /* Models with Intel GMA900 */ 6118 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6119 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6120 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6121 }; 6122 6123 static int __init brightness_init(struct ibm_init_struct *iibm) 6124 { 6125 int b; 6126 unsigned long quirks; 6127 6128 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6129 6130 mutex_init(&brightness_mutex); 6131 6132 quirks = tpacpi_check_quirks(brightness_quirk_table, 6133 ARRAY_SIZE(brightness_quirk_table)); 6134 6135 /* 6136 * We always attempt to detect acpi support, so as to switch 6137 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6138 * going to publish a backlight interface 6139 */ 6140 b = tpacpi_check_std_acpi_brightness_support(); 6141 if (b > 0) { 6142 6143 if (acpi_video_backlight_support()) { 6144 if (brightness_enable > 1) { 6145 printk(TPACPI_NOTICE 6146 "Standard ACPI backlight interface " 6147 "available, not loading native one.\n"); 6148 return 1; 6149 } else if (brightness_enable == 1) { 6150 printk(TPACPI_NOTICE 6151 "Backlight control force enabled, even if standard " 6152 "ACPI backlight interface is available\n"); 6153 } 6154 } else { 6155 if (brightness_enable > 1) { 6156 printk(TPACPI_NOTICE 6157 "Standard ACPI backlight interface not " 6158 "available, thinkpad_acpi native " 6159 "brightness control enabled\n"); 6160 } 6161 } 6162 } 6163 6164 if (!brightness_enable) { 6165 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6166 "brightness support disabled by " 6167 "module parameter\n"); 6168 return 1; 6169 } 6170 6171 if (b > 16) { 6172 printk(TPACPI_ERR 6173 "Unsupported brightness interface, " 6174 "please contact %s\n", TPACPI_MAIL); 6175 return 1; 6176 } 6177 if (b == 16) 6178 tp_features.bright_16levels = 1; 6179 6180 /* 6181 * Check for module parameter bogosity, note that we 6182 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6183 * able to detect "unspecified" 6184 */ 6185 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6186 return -EINVAL; 6187 6188 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6189 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6190 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6191 if (quirks & TPACPI_BRGHT_Q_EC) 6192 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6193 else 6194 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6195 6196 dbg_printk(TPACPI_DBG_BRGHT, 6197 "driver auto-selected brightness_mode=%d\n", 6198 brightness_mode); 6199 } 6200 6201 /* Safety */ 6202 if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM && 6203 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6204 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6205 return -EINVAL; 6206 6207 if (tpacpi_brightness_get_raw(&b) < 0) 6208 return 1; 6209 6210 if (tp_features.bright_16levels) 6211 printk(TPACPI_INFO 6212 "detected a 16-level brightness capable ThinkPad\n"); 6213 6214 ibm_backlight_device = backlight_device_register( 6215 TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL, 6216 &ibm_backlight_data); 6217 if (IS_ERR(ibm_backlight_device)) { 6218 int rc = PTR_ERR(ibm_backlight_device); 6219 ibm_backlight_device = NULL; 6220 printk(TPACPI_ERR "Could not register backlight device\n"); 6221 return rc; 6222 } 6223 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6224 "brightness is supported\n"); 6225 6226 if (quirks & TPACPI_BRGHT_Q_ASK) { 6227 printk(TPACPI_NOTICE 6228 "brightness: will use unverified default: " 6229 "brightness_mode=%d\n", brightness_mode); 6230 printk(TPACPI_NOTICE 6231 "brightness: please report to %s whether it works well " 6232 "or not on your ThinkPad\n", TPACPI_MAIL); 6233 } 6234 6235 ibm_backlight_device->props.max_brightness = 6236 (tp_features.bright_16levels)? 15 : 7; 6237 ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6238 backlight_update_status(ibm_backlight_device); 6239 6240 return 0; 6241 } 6242 6243 static void brightness_suspend(pm_message_t state) 6244 { 6245 tpacpi_brightness_checkpoint_nvram(); 6246 } 6247 6248 static void brightness_shutdown(void) 6249 { 6250 tpacpi_brightness_checkpoint_nvram(); 6251 } 6252 6253 static void brightness_exit(void) 6254 { 6255 if (ibm_backlight_device) { 6256 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6257 "calling backlight_device_unregister()\n"); 6258 backlight_device_unregister(ibm_backlight_device); 6259 } 6260 6261 tpacpi_brightness_checkpoint_nvram(); 6262 } 6263 6264 static int brightness_read(char *p) 6265 { 6266 int len = 0; 6267 int level; 6268 6269 level = brightness_get(NULL); 6270 if (level < 0) { 6271 len += sprintf(p + len, "level:\t\tunreadable\n"); 6272 } else { 6273 len += sprintf(p + len, "level:\t\t%d\n", level); 6274 len += sprintf(p + len, "commands:\tup, down\n"); 6275 len += sprintf(p + len, "commands:\tlevel <level>" 6276 " (<level> is 0-%d)\n", 6277 (tp_features.bright_16levels) ? 15 : 7); 6278 } 6279 6280 return len; 6281 } 6282 6283 static int brightness_write(char *buf) 6284 { 6285 int level; 6286 int rc; 6287 char *cmd; 6288 int max_level = (tp_features.bright_16levels) ? 15 : 7; 6289 6290 level = brightness_get(NULL); 6291 if (level < 0) 6292 return level; 6293 6294 while ((cmd = next_cmd(&buf))) { 6295 if (strlencmp(cmd, "up") == 0) { 6296 if (level < max_level) 6297 level++; 6298 } else if (strlencmp(cmd, "down") == 0) { 6299 if (level > 0) 6300 level--; 6301 } else if (sscanf(cmd, "level %d", &level) == 1 && 6302 level >= 0 && level <= max_level) { 6303 /* new level set */ 6304 } else 6305 return -EINVAL; 6306 } 6307 6308 tpacpi_disclose_usertask("procfs brightness", 6309 "set level to %d\n", level); 6310 6311 /* 6312 * Now we know what the final level should be, so we try to set it. 6313 * Doing it this way makes the syscall restartable in case of EINTR 6314 */ 6315 rc = brightness_set(level); 6316 return (rc == -EINTR)? ERESTARTSYS : rc; 6317 } 6318 6319 static struct ibm_struct brightness_driver_data = { 6320 .name = "brightness", 6321 .read = brightness_read, 6322 .write = brightness_write, 6323 .exit = brightness_exit, 6324 .suspend = brightness_suspend, 6325 .shutdown = brightness_shutdown, 6326 }; 6327 6328 /************************************************************************* 6329 * Volume subdriver 6330 */ 6331 6332 static int volume_offset = 0x30; 6333 6334 static int volume_read(char *p) 6335 { 6336 int len = 0; 6337 u8 level; 6338 6339 if (!acpi_ec_read(volume_offset, &level)) { 6340 len += sprintf(p + len, "level:\t\tunreadable\n"); 6341 } else { 6342 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf); 6343 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6)); 6344 len += sprintf(p + len, "commands:\tup, down, mute\n"); 6345 len += sprintf(p + len, "commands:\tlevel <level>" 6346 " (<level> is 0-15)\n"); 6347 } 6348 6349 return len; 6350 } 6351 6352 static int volume_write(char *buf) 6353 { 6354 int cmos_cmd, inc, i; 6355 u8 level, mute; 6356 int new_level, new_mute; 6357 char *cmd; 6358 6359 while ((cmd = next_cmd(&buf))) { 6360 if (!acpi_ec_read(volume_offset, &level)) 6361 return -EIO; 6362 new_mute = mute = level & 0x40; 6363 new_level = level = level & 0xf; 6364 6365 if (strlencmp(cmd, "up") == 0) { 6366 if (mute) 6367 new_mute = 0; 6368 else 6369 new_level = level == 15 ? 15 : level + 1; 6370 } else if (strlencmp(cmd, "down") == 0) { 6371 if (mute) 6372 new_mute = 0; 6373 else 6374 new_level = level == 0 ? 0 : level - 1; 6375 } else if (sscanf(cmd, "level %d", &new_level) == 1 && 6376 new_level >= 0 && new_level <= 15) { 6377 /* new_level set */ 6378 } else if (strlencmp(cmd, "mute") == 0) { 6379 new_mute = 0x40; 6380 } else 6381 return -EINVAL; 6382 6383 if (new_level != level) { 6384 /* mute doesn't change */ 6385 6386 cmos_cmd = (new_level > level) ? 6387 TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN; 6388 inc = new_level > level ? 1 : -1; 6389 6390 if (mute && (issue_thinkpad_cmos_command(cmos_cmd) || 6391 !acpi_ec_write(volume_offset, level))) 6392 return -EIO; 6393 6394 for (i = level; i != new_level; i += inc) 6395 if (issue_thinkpad_cmos_command(cmos_cmd) || 6396 !acpi_ec_write(volume_offset, i + inc)) 6397 return -EIO; 6398 6399 if (mute && 6400 (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) || 6401 !acpi_ec_write(volume_offset, new_level + mute))) { 6402 return -EIO; 6403 } 6404 } 6405 6406 if (new_mute != mute) { 6407 /* level doesn't change */ 6408 6409 cmos_cmd = (new_mute) ? 6410 TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP; 6411 6412 if (issue_thinkpad_cmos_command(cmos_cmd) || 6413 !acpi_ec_write(volume_offset, level + new_mute)) 6414 return -EIO; 6415 } 6416 } 6417 6418 return 0; 6419 } 6420 6421 static struct ibm_struct volume_driver_data = { 6422 .name = "volume", 6423 .read = volume_read, 6424 .write = volume_write, 6425 }; 6426 6427 /************************************************************************* 6428 * Fan subdriver 6429 */ 6430 6431 /* 6432 * FAN ACCESS MODES 6433 * 6434 * TPACPI_FAN_RD_ACPI_GFAN: 6435 * ACPI GFAN method: returns fan level 6436 * 6437 * see TPACPI_FAN_WR_ACPI_SFAN 6438 * EC 0x2f (HFSP) not available if GFAN exists 6439 * 6440 * TPACPI_FAN_WR_ACPI_SFAN: 6441 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 6442 * 6443 * EC 0x2f (HFSP) might be available *for reading*, but do not use 6444 * it for writing. 6445 * 6446 * TPACPI_FAN_WR_TPEC: 6447 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 6448 * Supported on almost all ThinkPads 6449 * 6450 * Fan speed changes of any sort (including those caused by the 6451 * disengaged mode) are usually done slowly by the firmware as the 6452 * maximum ammount of fan duty cycle change per second seems to be 6453 * limited. 6454 * 6455 * Reading is not available if GFAN exists. 6456 * Writing is not available if SFAN exists. 6457 * 6458 * Bits 6459 * 7 automatic mode engaged; 6460 * (default operation mode of the ThinkPad) 6461 * fan level is ignored in this mode. 6462 * 6 full speed mode (takes precedence over bit 7); 6463 * not available on all thinkpads. May disable 6464 * the tachometer while the fan controller ramps up 6465 * the speed (which can take up to a few *minutes*). 6466 * Speeds up fan to 100% duty-cycle, which is far above 6467 * the standard RPM levels. It is not impossible that 6468 * it could cause hardware damage. 6469 * 5-3 unused in some models. Extra bits for fan level 6470 * in others, but still useless as all values above 6471 * 7 map to the same speed as level 7 in these models. 6472 * 2-0 fan level (0..7 usually) 6473 * 0x00 = stop 6474 * 0x07 = max (set when temperatures critical) 6475 * Some ThinkPads may have other levels, see 6476 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 6477 * 6478 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 6479 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT 6480 * does so, its initial value is meaningless (0x07). 6481 * 6482 * For firmware bugs, refer to: 6483 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 6484 * 6485 * ---- 6486 * 6487 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 6488 * Main fan tachometer reading (in RPM) 6489 * 6490 * This register is present on all ThinkPads with a new-style EC, and 6491 * it is known not to be present on the A21m/e, and T22, as there is 6492 * something else in offset 0x84 according to the ACPI DSDT. Other 6493 * ThinkPads from this same time period (and earlier) probably lack the 6494 * tachometer as well. 6495 * 6496 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 6497 * was never fixed by IBM to report the EC firmware version string 6498 * probably support the tachometer (like the early X models), so 6499 * detecting it is quite hard. We need more data to know for sure. 6500 * 6501 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 6502 * might result. 6503 * 6504 * FIRMWARE BUG: may go stale while the EC is switching to full speed 6505 * mode. 6506 * 6507 * For firmware bugs, refer to: 6508 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 6509 * 6510 * ---- 6511 * 6512 * ThinkPad EC register 0x31 bit 0 (only on select models) 6513 * 6514 * When bit 0 of EC register 0x31 is zero, the tachometer registers 6515 * show the speed of the main fan. When bit 0 of EC register 0x31 6516 * is one, the tachometer registers show the speed of the auxiliary 6517 * fan. 6518 * 6519 * Fan control seems to affect both fans, regardless of the state 6520 * of this bit. 6521 * 6522 * So far, only the firmware for the X60/X61 non-tablet versions 6523 * seem to support this (firmware TP-7M). 6524 * 6525 * TPACPI_FAN_WR_ACPI_FANS: 6526 * ThinkPad X31, X40, X41. Not available in the X60. 6527 * 6528 * FANS ACPI handle: takes three arguments: low speed, medium speed, 6529 * high speed. ACPI DSDT seems to map these three speeds to levels 6530 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 6531 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 6532 * 6533 * The speeds are stored on handles 6534 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 6535 * 6536 * There are three default speed sets, acessible as handles: 6537 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 6538 * 6539 * ACPI DSDT switches which set is in use depending on various 6540 * factors. 6541 * 6542 * TPACPI_FAN_WR_TPEC is also available and should be used to 6543 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 6544 * but the ACPI tables just mention level 7. 6545 */ 6546 6547 enum { /* Fan control constants */ 6548 fan_status_offset = 0x2f, /* EC register 0x2f */ 6549 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 6550 * 0x84 must be read before 0x85 */ 6551 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 6552 bit 0 selects which fan is active */ 6553 6554 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 6555 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 6556 6557 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 6558 }; 6559 6560 enum fan_status_access_mode { 6561 TPACPI_FAN_NONE = 0, /* No fan status or control */ 6562 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 6563 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 6564 }; 6565 6566 enum fan_control_access_mode { 6567 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 6568 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 6569 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 6570 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 6571 }; 6572 6573 enum fan_control_commands { 6574 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 6575 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 6576 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 6577 * and also watchdog cmd */ 6578 }; 6579 6580 static int fan_control_allowed; 6581 6582 static enum fan_status_access_mode fan_status_access_mode; 6583 static enum fan_control_access_mode fan_control_access_mode; 6584 static enum fan_control_commands fan_control_commands; 6585 6586 static u8 fan_control_initial_status; 6587 static u8 fan_control_desired_level; 6588 static u8 fan_control_resume_level; 6589 static int fan_watchdog_maxinterval; 6590 6591 static struct mutex fan_mutex; 6592 6593 static void fan_watchdog_fire(struct work_struct *ignored); 6594 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 6595 6596 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 6597 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 6598 "\\FSPD", /* 600e/x, 770e, 770x */ 6599 ); /* all others */ 6600 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 6601 "JFNS", /* 770x-JL */ 6602 ); /* all others */ 6603 6604 /* 6605 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 6606 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 6607 * be in auto mode (0x80). 6608 * 6609 * This is corrected by any write to HFSP either by the driver, or 6610 * by the firmware. 6611 * 6612 * We assume 0x07 really means auto mode while this quirk is active, 6613 * as this is far more likely than the ThinkPad being in level 7, 6614 * which is only used by the firmware during thermal emergencies. 6615 * 6616 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 6617 * TP-70 (T43, R52), which are known to be buggy. 6618 */ 6619 6620 static void fan_quirk1_setup(void) 6621 { 6622 if (fan_control_initial_status == 0x07) { 6623 printk(TPACPI_NOTICE 6624 "fan_init: initial fan status is unknown, " 6625 "assuming it is in auto mode\n"); 6626 tp_features.fan_ctrl_status_undef = 1; 6627 } 6628 } 6629 6630 static void fan_quirk1_handle(u8 *fan_status) 6631 { 6632 if (unlikely(tp_features.fan_ctrl_status_undef)) { 6633 if (*fan_status != fan_control_initial_status) { 6634 /* something changed the HFSP regisnter since 6635 * driver init time, so it is not undefined 6636 * anymore */ 6637 tp_features.fan_ctrl_status_undef = 0; 6638 } else { 6639 /* Return most likely status. In fact, it 6640 * might be the only possible status */ 6641 *fan_status = TP_EC_FAN_AUTO; 6642 } 6643 } 6644 } 6645 6646 /* Select main fan on X60/X61, NOOP on others */ 6647 static bool fan_select_fan1(void) 6648 { 6649 if (tp_features.second_fan) { 6650 u8 val; 6651 6652 if (ec_read(fan_select_offset, &val) < 0) 6653 return false; 6654 val &= 0xFEU; 6655 if (ec_write(fan_select_offset, val) < 0) 6656 return false; 6657 } 6658 return true; 6659 } 6660 6661 /* Select secondary fan on X60/X61 */ 6662 static bool fan_select_fan2(void) 6663 { 6664 u8 val; 6665 6666 if (!tp_features.second_fan) 6667 return false; 6668 6669 if (ec_read(fan_select_offset, &val) < 0) 6670 return false; 6671 val |= 0x01U; 6672 if (ec_write(fan_select_offset, val) < 0) 6673 return false; 6674 6675 return true; 6676 } 6677 6678 /* 6679 * Call with fan_mutex held 6680 */ 6681 static void fan_update_desired_level(u8 status) 6682 { 6683 if ((status & 6684 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 6685 if (status > 7) 6686 fan_control_desired_level = 7; 6687 else 6688 fan_control_desired_level = status; 6689 } 6690 } 6691 6692 static int fan_get_status(u8 *status) 6693 { 6694 u8 s; 6695 6696 /* TODO: 6697 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 6698 6699 switch (fan_status_access_mode) { 6700 case TPACPI_FAN_RD_ACPI_GFAN: 6701 /* 570, 600e/x, 770e, 770x */ 6702 6703 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d"))) 6704 return -EIO; 6705 6706 if (likely(status)) 6707 *status = s & 0x07; 6708 6709 break; 6710 6711 case TPACPI_FAN_RD_TPEC: 6712 /* all except 570, 600e/x, 770e, 770x */ 6713 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 6714 return -EIO; 6715 6716 if (likely(status)) { 6717 *status = s; 6718 fan_quirk1_handle(status); 6719 } 6720 6721 break; 6722 6723 default: 6724 return -ENXIO; 6725 } 6726 6727 return 0; 6728 } 6729 6730 static int fan_get_status_safe(u8 *status) 6731 { 6732 int rc; 6733 u8 s; 6734 6735 if (mutex_lock_killable(&fan_mutex)) 6736 return -ERESTARTSYS; 6737 rc = fan_get_status(&s); 6738 if (!rc) 6739 fan_update_desired_level(s); 6740 mutex_unlock(&fan_mutex); 6741 6742 if (status) 6743 *status = s; 6744 6745 return rc; 6746 } 6747 6748 static int fan_get_speed(unsigned int *speed) 6749 { 6750 u8 hi, lo; 6751 6752 switch (fan_status_access_mode) { 6753 case TPACPI_FAN_RD_TPEC: 6754 /* all except 570, 600e/x, 770e, 770x */ 6755 if (unlikely(!fan_select_fan1())) 6756 return -EIO; 6757 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 6758 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 6759 return -EIO; 6760 6761 if (likely(speed)) 6762 *speed = (hi << 8) | lo; 6763 6764 break; 6765 6766 default: 6767 return -ENXIO; 6768 } 6769 6770 return 0; 6771 } 6772 6773 static int fan2_get_speed(unsigned int *speed) 6774 { 6775 u8 hi, lo; 6776 bool rc; 6777 6778 switch (fan_status_access_mode) { 6779 case TPACPI_FAN_RD_TPEC: 6780 /* all except 570, 600e/x, 770e, 770x */ 6781 if (unlikely(!fan_select_fan2())) 6782 return -EIO; 6783 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 6784 !acpi_ec_read(fan_rpm_offset + 1, &hi); 6785 fan_select_fan1(); /* play it safe */ 6786 if (rc) 6787 return -EIO; 6788 6789 if (likely(speed)) 6790 *speed = (hi << 8) | lo; 6791 6792 break; 6793 6794 default: 6795 return -ENXIO; 6796 } 6797 6798 return 0; 6799 } 6800 6801 static int fan_set_level(int level) 6802 { 6803 if (!fan_control_allowed) 6804 return -EPERM; 6805 6806 switch (fan_control_access_mode) { 6807 case TPACPI_FAN_WR_ACPI_SFAN: 6808 if (level >= 0 && level <= 7) { 6809 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 6810 return -EIO; 6811 } else 6812 return -EINVAL; 6813 break; 6814 6815 case TPACPI_FAN_WR_ACPI_FANS: 6816 case TPACPI_FAN_WR_TPEC: 6817 if (!(level & TP_EC_FAN_AUTO) && 6818 !(level & TP_EC_FAN_FULLSPEED) && 6819 ((level < 0) || (level > 7))) 6820 return -EINVAL; 6821 6822 /* safety net should the EC not support AUTO 6823 * or FULLSPEED mode bits and just ignore them */ 6824 if (level & TP_EC_FAN_FULLSPEED) 6825 level |= 7; /* safety min speed 7 */ 6826 else if (level & TP_EC_FAN_AUTO) 6827 level |= 4; /* safety min speed 4 */ 6828 6829 if (!acpi_ec_write(fan_status_offset, level)) 6830 return -EIO; 6831 else 6832 tp_features.fan_ctrl_status_undef = 0; 6833 break; 6834 6835 default: 6836 return -ENXIO; 6837 } 6838 6839 vdbg_printk(TPACPI_DBG_FAN, 6840 "fan control: set fan control register to 0x%02x\n", level); 6841 return 0; 6842 } 6843 6844 static int fan_set_level_safe(int level) 6845 { 6846 int rc; 6847 6848 if (!fan_control_allowed) 6849 return -EPERM; 6850 6851 if (mutex_lock_killable(&fan_mutex)) 6852 return -ERESTARTSYS; 6853 6854 if (level == TPACPI_FAN_LAST_LEVEL) 6855 level = fan_control_desired_level; 6856 6857 rc = fan_set_level(level); 6858 if (!rc) 6859 fan_update_desired_level(level); 6860 6861 mutex_unlock(&fan_mutex); 6862 return rc; 6863 } 6864 6865 static int fan_set_enable(void) 6866 { 6867 u8 s; 6868 int rc; 6869 6870 if (!fan_control_allowed) 6871 return -EPERM; 6872 6873 if (mutex_lock_killable(&fan_mutex)) 6874 return -ERESTARTSYS; 6875 6876 switch (fan_control_access_mode) { 6877 case TPACPI_FAN_WR_ACPI_FANS: 6878 case TPACPI_FAN_WR_TPEC: 6879 rc = fan_get_status(&s); 6880 if (rc < 0) 6881 break; 6882 6883 /* Don't go out of emergency fan mode */ 6884 if (s != 7) { 6885 s &= 0x07; 6886 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 6887 } 6888 6889 if (!acpi_ec_write(fan_status_offset, s)) 6890 rc = -EIO; 6891 else { 6892 tp_features.fan_ctrl_status_undef = 0; 6893 rc = 0; 6894 } 6895 break; 6896 6897 case TPACPI_FAN_WR_ACPI_SFAN: 6898 rc = fan_get_status(&s); 6899 if (rc < 0) 6900 break; 6901 6902 s &= 0x07; 6903 6904 /* Set fan to at least level 4 */ 6905 s |= 4; 6906 6907 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 6908 rc = -EIO; 6909 else 6910 rc = 0; 6911 break; 6912 6913 default: 6914 rc = -ENXIO; 6915 } 6916 6917 mutex_unlock(&fan_mutex); 6918 6919 if (!rc) 6920 vdbg_printk(TPACPI_DBG_FAN, 6921 "fan control: set fan control register to 0x%02x\n", 6922 s); 6923 return rc; 6924 } 6925 6926 static int fan_set_disable(void) 6927 { 6928 int rc; 6929 6930 if (!fan_control_allowed) 6931 return -EPERM; 6932 6933 if (mutex_lock_killable(&fan_mutex)) 6934 return -ERESTARTSYS; 6935 6936 rc = 0; 6937 switch (fan_control_access_mode) { 6938 case TPACPI_FAN_WR_ACPI_FANS: 6939 case TPACPI_FAN_WR_TPEC: 6940 if (!acpi_ec_write(fan_status_offset, 0x00)) 6941 rc = -EIO; 6942 else { 6943 fan_control_desired_level = 0; 6944 tp_features.fan_ctrl_status_undef = 0; 6945 } 6946 break; 6947 6948 case TPACPI_FAN_WR_ACPI_SFAN: 6949 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 6950 rc = -EIO; 6951 else 6952 fan_control_desired_level = 0; 6953 break; 6954 6955 default: 6956 rc = -ENXIO; 6957 } 6958 6959 if (!rc) 6960 vdbg_printk(TPACPI_DBG_FAN, 6961 "fan control: set fan control register to 0\n"); 6962 6963 mutex_unlock(&fan_mutex); 6964 return rc; 6965 } 6966 6967 static int fan_set_speed(int speed) 6968 { 6969 int rc; 6970 6971 if (!fan_control_allowed) 6972 return -EPERM; 6973 6974 if (mutex_lock_killable(&fan_mutex)) 6975 return -ERESTARTSYS; 6976 6977 rc = 0; 6978 switch (fan_control_access_mode) { 6979 case TPACPI_FAN_WR_ACPI_FANS: 6980 if (speed >= 0 && speed <= 65535) { 6981 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 6982 speed, speed, speed)) 6983 rc = -EIO; 6984 } else 6985 rc = -EINVAL; 6986 break; 6987 6988 default: 6989 rc = -ENXIO; 6990 } 6991 6992 mutex_unlock(&fan_mutex); 6993 return rc; 6994 } 6995 6996 static void fan_watchdog_reset(void) 6997 { 6998 static int fan_watchdog_active; 6999 7000 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 7001 return; 7002 7003 if (fan_watchdog_active) 7004 cancel_delayed_work(&fan_watchdog_task); 7005 7006 if (fan_watchdog_maxinterval > 0 && 7007 tpacpi_lifecycle != TPACPI_LIFE_EXITING) { 7008 fan_watchdog_active = 1; 7009 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task, 7010 msecs_to_jiffies(fan_watchdog_maxinterval 7011 * 1000))) { 7012 printk(TPACPI_ERR 7013 "failed to queue the fan watchdog, " 7014 "watchdog will not trigger\n"); 7015 } 7016 } else 7017 fan_watchdog_active = 0; 7018 } 7019 7020 static void fan_watchdog_fire(struct work_struct *ignored) 7021 { 7022 int rc; 7023 7024 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 7025 return; 7026 7027 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n"); 7028 rc = fan_set_enable(); 7029 if (rc < 0) { 7030 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, " 7031 "will try again later...\n", -rc); 7032 /* reschedule for later */ 7033 fan_watchdog_reset(); 7034 } 7035 } 7036 7037 /* 7038 * SYSFS fan layout: hwmon compatible (device) 7039 * 7040 * pwm*_enable: 7041 * 0: "disengaged" mode 7042 * 1: manual mode 7043 * 2: native EC "auto" mode (recommended, hardware default) 7044 * 7045 * pwm*: set speed in manual mode, ignored otherwise. 7046 * 0 is level 0; 255 is level 7. Intermediate points done with linear 7047 * interpolation. 7048 * 7049 * fan*_input: tachometer reading, RPM 7050 * 7051 * 7052 * SYSFS fan layout: extensions 7053 * 7054 * fan_watchdog (driver): 7055 * fan watchdog interval in seconds, 0 disables (default), max 120 7056 */ 7057 7058 /* sysfs fan pwm1_enable ----------------------------------------------- */ 7059 static ssize_t fan_pwm1_enable_show(struct device *dev, 7060 struct device_attribute *attr, 7061 char *buf) 7062 { 7063 int res, mode; 7064 u8 status; 7065 7066 res = fan_get_status_safe(&status); 7067 if (res) 7068 return res; 7069 7070 if (status & TP_EC_FAN_FULLSPEED) { 7071 mode = 0; 7072 } else if (status & TP_EC_FAN_AUTO) { 7073 mode = 2; 7074 } else 7075 mode = 1; 7076 7077 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 7078 } 7079 7080 static ssize_t fan_pwm1_enable_store(struct device *dev, 7081 struct device_attribute *attr, 7082 const char *buf, size_t count) 7083 { 7084 unsigned long t; 7085 int res, level; 7086 7087 if (parse_strtoul(buf, 2, &t)) 7088 return -EINVAL; 7089 7090 tpacpi_disclose_usertask("hwmon pwm1_enable", 7091 "set fan mode to %lu\n", t); 7092 7093 switch (t) { 7094 case 0: 7095 level = TP_EC_FAN_FULLSPEED; 7096 break; 7097 case 1: 7098 level = TPACPI_FAN_LAST_LEVEL; 7099 break; 7100 case 2: 7101 level = TP_EC_FAN_AUTO; 7102 break; 7103 case 3: 7104 /* reserved for software-controlled auto mode */ 7105 return -ENOSYS; 7106 default: 7107 return -EINVAL; 7108 } 7109 7110 res = fan_set_level_safe(level); 7111 if (res == -ENXIO) 7112 return -EINVAL; 7113 else if (res < 0) 7114 return res; 7115 7116 fan_watchdog_reset(); 7117 7118 return count; 7119 } 7120 7121 static struct device_attribute dev_attr_fan_pwm1_enable = 7122 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 7123 fan_pwm1_enable_show, fan_pwm1_enable_store); 7124 7125 /* sysfs fan pwm1 ------------------------------------------------------ */ 7126 static ssize_t fan_pwm1_show(struct device *dev, 7127 struct device_attribute *attr, 7128 char *buf) 7129 { 7130 int res; 7131 u8 status; 7132 7133 res = fan_get_status_safe(&status); 7134 if (res) 7135 return res; 7136 7137 if ((status & 7138 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 7139 status = fan_control_desired_level; 7140 7141 if (status > 7) 7142 status = 7; 7143 7144 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 7145 } 7146 7147 static ssize_t fan_pwm1_store(struct device *dev, 7148 struct device_attribute *attr, 7149 const char *buf, size_t count) 7150 { 7151 unsigned long s; 7152 int rc; 7153 u8 status, newlevel; 7154 7155 if (parse_strtoul(buf, 255, &s)) 7156 return -EINVAL; 7157 7158 tpacpi_disclose_usertask("hwmon pwm1", 7159 "set fan speed to %lu\n", s); 7160 7161 /* scale down from 0-255 to 0-7 */ 7162 newlevel = (s >> 5) & 0x07; 7163 7164 if (mutex_lock_killable(&fan_mutex)) 7165 return -ERESTARTSYS; 7166 7167 rc = fan_get_status(&status); 7168 if (!rc && (status & 7169 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7170 rc = fan_set_level(newlevel); 7171 if (rc == -ENXIO) 7172 rc = -EINVAL; 7173 else if (!rc) { 7174 fan_update_desired_level(newlevel); 7175 fan_watchdog_reset(); 7176 } 7177 } 7178 7179 mutex_unlock(&fan_mutex); 7180 return (rc)? rc : count; 7181 } 7182 7183 static struct device_attribute dev_attr_fan_pwm1 = 7184 __ATTR(pwm1, S_IWUSR | S_IRUGO, 7185 fan_pwm1_show, fan_pwm1_store); 7186 7187 /* sysfs fan fan1_input ------------------------------------------------ */ 7188 static ssize_t fan_fan1_input_show(struct device *dev, 7189 struct device_attribute *attr, 7190 char *buf) 7191 { 7192 int res; 7193 unsigned int speed; 7194 7195 res = fan_get_speed(&speed); 7196 if (res < 0) 7197 return res; 7198 7199 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7200 } 7201 7202 static struct device_attribute dev_attr_fan_fan1_input = 7203 __ATTR(fan1_input, S_IRUGO, 7204 fan_fan1_input_show, NULL); 7205 7206 /* sysfs fan fan2_input ------------------------------------------------ */ 7207 static ssize_t fan_fan2_input_show(struct device *dev, 7208 struct device_attribute *attr, 7209 char *buf) 7210 { 7211 int res; 7212 unsigned int speed; 7213 7214 res = fan2_get_speed(&speed); 7215 if (res < 0) 7216 return res; 7217 7218 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7219 } 7220 7221 static struct device_attribute dev_attr_fan_fan2_input = 7222 __ATTR(fan2_input, S_IRUGO, 7223 fan_fan2_input_show, NULL); 7224 7225 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 7226 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 7227 char *buf) 7228 { 7229 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 7230 } 7231 7232 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 7233 const char *buf, size_t count) 7234 { 7235 unsigned long t; 7236 7237 if (parse_strtoul(buf, 120, &t)) 7238 return -EINVAL; 7239 7240 if (!fan_control_allowed) 7241 return -EPERM; 7242 7243 fan_watchdog_maxinterval = t; 7244 fan_watchdog_reset(); 7245 7246 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 7247 7248 return count; 7249 } 7250 7251 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 7252 fan_fan_watchdog_show, fan_fan_watchdog_store); 7253 7254 /* --------------------------------------------------------------------- */ 7255 static struct attribute *fan_attributes[] = { 7256 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr, 7257 &dev_attr_fan_fan1_input.attr, 7258 NULL, /* for fan2_input */ 7259 NULL 7260 }; 7261 7262 static const struct attribute_group fan_attr_group = { 7263 .attrs = fan_attributes, 7264 }; 7265 7266 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 7267 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 7268 7269 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 7270 { .vendor = PCI_VENDOR_ID_IBM, \ 7271 .bios = TPACPI_MATCH_ANY, \ 7272 .ec = TPID(__id1, __id2), \ 7273 .quirks = __quirks } 7274 7275 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 7276 { .vendor = PCI_VENDOR_ID_LENOVO, \ 7277 .bios = TPACPI_MATCH_ANY, \ 7278 .ec = TPID(__id1, __id2), \ 7279 .quirks = __quirks } 7280 7281 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 7282 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 7283 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 7284 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 7285 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 7286 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 7287 }; 7288 7289 #undef TPACPI_FAN_QL 7290 #undef TPACPI_FAN_QI 7291 7292 static int __init fan_init(struct ibm_init_struct *iibm) 7293 { 7294 int rc; 7295 unsigned long quirks; 7296 7297 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 7298 "initializing fan subdriver\n"); 7299 7300 mutex_init(&fan_mutex); 7301 fan_status_access_mode = TPACPI_FAN_NONE; 7302 fan_control_access_mode = TPACPI_FAN_WR_NONE; 7303 fan_control_commands = 0; 7304 fan_watchdog_maxinterval = 0; 7305 tp_features.fan_ctrl_status_undef = 0; 7306 tp_features.second_fan = 0; 7307 fan_control_desired_level = 7; 7308 7309 TPACPI_ACPIHANDLE_INIT(fans); 7310 TPACPI_ACPIHANDLE_INIT(gfan); 7311 TPACPI_ACPIHANDLE_INIT(sfan); 7312 7313 quirks = tpacpi_check_quirks(fan_quirk_table, 7314 ARRAY_SIZE(fan_quirk_table)); 7315 7316 if (gfan_handle) { 7317 /* 570, 600e/x, 770e, 770x */ 7318 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 7319 } else { 7320 /* all other ThinkPads: note that even old-style 7321 * ThinkPad ECs supports the fan control register */ 7322 if (likely(acpi_ec_read(fan_status_offset, 7323 &fan_control_initial_status))) { 7324 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 7325 if (quirks & TPACPI_FAN_Q1) 7326 fan_quirk1_setup(); 7327 if (quirks & TPACPI_FAN_2FAN) { 7328 tp_features.second_fan = 1; 7329 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 7330 "secondary fan support enabled\n"); 7331 } 7332 } else { 7333 printk(TPACPI_ERR 7334 "ThinkPad ACPI EC access misbehaving, " 7335 "fan status and control unavailable\n"); 7336 return 1; 7337 } 7338 } 7339 7340 if (sfan_handle) { 7341 /* 570, 770x-JL */ 7342 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 7343 fan_control_commands |= 7344 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 7345 } else { 7346 if (!gfan_handle) { 7347 /* gfan without sfan means no fan control */ 7348 /* all other models implement TP EC 0x2f control */ 7349 7350 if (fans_handle) { 7351 /* X31, X40, X41 */ 7352 fan_control_access_mode = 7353 TPACPI_FAN_WR_ACPI_FANS; 7354 fan_control_commands |= 7355 TPACPI_FAN_CMD_SPEED | 7356 TPACPI_FAN_CMD_LEVEL | 7357 TPACPI_FAN_CMD_ENABLE; 7358 } else { 7359 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 7360 fan_control_commands |= 7361 TPACPI_FAN_CMD_LEVEL | 7362 TPACPI_FAN_CMD_ENABLE; 7363 } 7364 } 7365 } 7366 7367 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 7368 "fan is %s, modes %d, %d\n", 7369 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 7370 fan_control_access_mode != TPACPI_FAN_WR_NONE), 7371 fan_status_access_mode, fan_control_access_mode); 7372 7373 /* fan control master switch */ 7374 if (!fan_control_allowed) { 7375 fan_control_access_mode = TPACPI_FAN_WR_NONE; 7376 fan_control_commands = 0; 7377 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 7378 "fan control features disabled by parameter\n"); 7379 } 7380 7381 /* update fan_control_desired_level */ 7382 if (fan_status_access_mode != TPACPI_FAN_NONE) 7383 fan_get_status_safe(NULL); 7384 7385 if (fan_status_access_mode != TPACPI_FAN_NONE || 7386 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 7387 if (tp_features.second_fan) { 7388 /* attach second fan tachometer */ 7389 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 7390 &dev_attr_fan_fan2_input.attr; 7391 } 7392 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 7393 &fan_attr_group); 7394 if (rc < 0) 7395 return rc; 7396 7397 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 7398 &driver_attr_fan_watchdog); 7399 if (rc < 0) { 7400 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 7401 &fan_attr_group); 7402 return rc; 7403 } 7404 return 0; 7405 } else 7406 return 1; 7407 } 7408 7409 static void fan_exit(void) 7410 { 7411 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 7412 "cancelling any pending fan watchdog tasks\n"); 7413 7414 /* FIXME: can we really do this unconditionally? */ 7415 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 7416 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 7417 &driver_attr_fan_watchdog); 7418 7419 cancel_delayed_work(&fan_watchdog_task); 7420 flush_workqueue(tpacpi_wq); 7421 } 7422 7423 static void fan_suspend(pm_message_t state) 7424 { 7425 int rc; 7426 7427 if (!fan_control_allowed) 7428 return; 7429 7430 /* Store fan status in cache */ 7431 fan_control_resume_level = 0; 7432 rc = fan_get_status_safe(&fan_control_resume_level); 7433 if (rc < 0) 7434 printk(TPACPI_NOTICE 7435 "failed to read fan level for later " 7436 "restore during resume: %d\n", rc); 7437 7438 /* if it is undefined, don't attempt to restore it. 7439 * KEEP THIS LAST */ 7440 if (tp_features.fan_ctrl_status_undef) 7441 fan_control_resume_level = 0; 7442 } 7443 7444 static void fan_resume(void) 7445 { 7446 u8 current_level = 7; 7447 bool do_set = false; 7448 int rc; 7449 7450 /* DSDT *always* updates status on resume */ 7451 tp_features.fan_ctrl_status_undef = 0; 7452 7453 if (!fan_control_allowed || 7454 !fan_control_resume_level || 7455 (fan_get_status_safe(¤t_level) < 0)) 7456 return; 7457 7458 switch (fan_control_access_mode) { 7459 case TPACPI_FAN_WR_ACPI_SFAN: 7460 /* never decrease fan level */ 7461 do_set = (fan_control_resume_level > current_level); 7462 break; 7463 case TPACPI_FAN_WR_ACPI_FANS: 7464 case TPACPI_FAN_WR_TPEC: 7465 /* never decrease fan level, scale is: 7466 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 7467 * 7468 * We expect the firmware to set either 7 or AUTO, but we 7469 * handle FULLSPEED out of paranoia. 7470 * 7471 * So, we can safely only restore FULLSPEED or 7, anything 7472 * else could slow the fan. Restoring AUTO is useless, at 7473 * best that's exactly what the DSDT already set (it is the 7474 * slower it uses). 7475 * 7476 * Always keep in mind that the DSDT *will* have set the 7477 * fans to what the vendor supposes is the best level. We 7478 * muck with it only to speed the fan up. 7479 */ 7480 if (fan_control_resume_level != 7 && 7481 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 7482 return; 7483 else 7484 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 7485 (current_level != fan_control_resume_level); 7486 break; 7487 default: 7488 return; 7489 } 7490 if (do_set) { 7491 printk(TPACPI_NOTICE 7492 "restoring fan level to 0x%02x\n", 7493 fan_control_resume_level); 7494 rc = fan_set_level_safe(fan_control_resume_level); 7495 if (rc < 0) 7496 printk(TPACPI_NOTICE 7497 "failed to restore fan level: %d\n", rc); 7498 } 7499 } 7500 7501 static int fan_read(char *p) 7502 { 7503 int len = 0; 7504 int rc; 7505 u8 status; 7506 unsigned int speed = 0; 7507 7508 switch (fan_status_access_mode) { 7509 case TPACPI_FAN_RD_ACPI_GFAN: 7510 /* 570, 600e/x, 770e, 770x */ 7511 rc = fan_get_status_safe(&status); 7512 if (rc < 0) 7513 return rc; 7514 7515 len += sprintf(p + len, "status:\t\t%s\n" 7516 "level:\t\t%d\n", 7517 (status != 0) ? "enabled" : "disabled", status); 7518 break; 7519 7520 case TPACPI_FAN_RD_TPEC: 7521 /* all except 570, 600e/x, 770e, 770x */ 7522 rc = fan_get_status_safe(&status); 7523 if (rc < 0) 7524 return rc; 7525 7526 len += sprintf(p + len, "status:\t\t%s\n", 7527 (status != 0) ? "enabled" : "disabled"); 7528 7529 rc = fan_get_speed(&speed); 7530 if (rc < 0) 7531 return rc; 7532 7533 len += sprintf(p + len, "speed:\t\t%d\n", speed); 7534 7535 if (status & TP_EC_FAN_FULLSPEED) 7536 /* Disengaged mode takes precedence */ 7537 len += sprintf(p + len, "level:\t\tdisengaged\n"); 7538 else if (status & TP_EC_FAN_AUTO) 7539 len += sprintf(p + len, "level:\t\tauto\n"); 7540 else 7541 len += sprintf(p + len, "level:\t\t%d\n", status); 7542 break; 7543 7544 case TPACPI_FAN_NONE: 7545 default: 7546 len += sprintf(p + len, "status:\t\tnot supported\n"); 7547 } 7548 7549 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 7550 len += sprintf(p + len, "commands:\tlevel <level>"); 7551 7552 switch (fan_control_access_mode) { 7553 case TPACPI_FAN_WR_ACPI_SFAN: 7554 len += sprintf(p + len, " (<level> is 0-7)\n"); 7555 break; 7556 7557 default: 7558 len += sprintf(p + len, " (<level> is 0-7, " 7559 "auto, disengaged, full-speed)\n"); 7560 break; 7561 } 7562 } 7563 7564 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 7565 len += sprintf(p + len, "commands:\tenable, disable\n" 7566 "commands:\twatchdog <timeout> (<timeout> " 7567 "is 0 (off), 1-120 (seconds))\n"); 7568 7569 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 7570 len += sprintf(p + len, "commands:\tspeed <speed>" 7571 " (<speed> is 0-65535)\n"); 7572 7573 return len; 7574 } 7575 7576 static int fan_write_cmd_level(const char *cmd, int *rc) 7577 { 7578 int level; 7579 7580 if (strlencmp(cmd, "level auto") == 0) 7581 level = TP_EC_FAN_AUTO; 7582 else if ((strlencmp(cmd, "level disengaged") == 0) | 7583 (strlencmp(cmd, "level full-speed") == 0)) 7584 level = TP_EC_FAN_FULLSPEED; 7585 else if (sscanf(cmd, "level %d", &level) != 1) 7586 return 0; 7587 7588 *rc = fan_set_level_safe(level); 7589 if (*rc == -ENXIO) 7590 printk(TPACPI_ERR "level command accepted for unsupported " 7591 "access mode %d", fan_control_access_mode); 7592 else if (!*rc) 7593 tpacpi_disclose_usertask("procfs fan", 7594 "set level to %d\n", level); 7595 7596 return 1; 7597 } 7598 7599 static int fan_write_cmd_enable(const char *cmd, int *rc) 7600 { 7601 if (strlencmp(cmd, "enable") != 0) 7602 return 0; 7603 7604 *rc = fan_set_enable(); 7605 if (*rc == -ENXIO) 7606 printk(TPACPI_ERR "enable command accepted for unsupported " 7607 "access mode %d", fan_control_access_mode); 7608 else if (!*rc) 7609 tpacpi_disclose_usertask("procfs fan", "enable\n"); 7610 7611 return 1; 7612 } 7613 7614 static int fan_write_cmd_disable(const char *cmd, int *rc) 7615 { 7616 if (strlencmp(cmd, "disable") != 0) 7617 return 0; 7618 7619 *rc = fan_set_disable(); 7620 if (*rc == -ENXIO) 7621 printk(TPACPI_ERR "disable command accepted for unsupported " 7622 "access mode %d", fan_control_access_mode); 7623 else if (!*rc) 7624 tpacpi_disclose_usertask("procfs fan", "disable\n"); 7625 7626 return 1; 7627 } 7628 7629 static int fan_write_cmd_speed(const char *cmd, int *rc) 7630 { 7631 int speed; 7632 7633 /* TODO: 7634 * Support speed <low> <medium> <high> ? */ 7635 7636 if (sscanf(cmd, "speed %d", &speed) != 1) 7637 return 0; 7638 7639 *rc = fan_set_speed(speed); 7640 if (*rc == -ENXIO) 7641 printk(TPACPI_ERR "speed command accepted for unsupported " 7642 "access mode %d", fan_control_access_mode); 7643 else if (!*rc) 7644 tpacpi_disclose_usertask("procfs fan", 7645 "set speed to %d\n", speed); 7646 7647 return 1; 7648 } 7649 7650 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 7651 { 7652 int interval; 7653 7654 if (sscanf(cmd, "watchdog %d", &interval) != 1) 7655 return 0; 7656 7657 if (interval < 0 || interval > 120) 7658 *rc = -EINVAL; 7659 else { 7660 fan_watchdog_maxinterval = interval; 7661 tpacpi_disclose_usertask("procfs fan", 7662 "set watchdog timer to %d\n", 7663 interval); 7664 } 7665 7666 return 1; 7667 } 7668 7669 static int fan_write(char *buf) 7670 { 7671 char *cmd; 7672 int rc = 0; 7673 7674 while (!rc && (cmd = next_cmd(&buf))) { 7675 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 7676 fan_write_cmd_level(cmd, &rc)) && 7677 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 7678 (fan_write_cmd_enable(cmd, &rc) || 7679 fan_write_cmd_disable(cmd, &rc) || 7680 fan_write_cmd_watchdog(cmd, &rc))) && 7681 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 7682 fan_write_cmd_speed(cmd, &rc)) 7683 ) 7684 rc = -EINVAL; 7685 else if (!rc) 7686 fan_watchdog_reset(); 7687 } 7688 7689 return rc; 7690 } 7691 7692 static struct ibm_struct fan_driver_data = { 7693 .name = "fan", 7694 .read = fan_read, 7695 .write = fan_write, 7696 .exit = fan_exit, 7697 .suspend = fan_suspend, 7698 .resume = fan_resume, 7699 }; 7700 7701 /**************************************************************************** 7702 **************************************************************************** 7703 * 7704 * Infrastructure 7705 * 7706 **************************************************************************** 7707 ****************************************************************************/ 7708 7709 /* 7710 * HKEY event callout for other subdrivers go here 7711 * (yes, it is ugly, but it is quick, safe, and gets the job done 7712 */ 7713 static void tpacpi_driver_event(const unsigned int hkey_event) 7714 { 7715 } 7716 7717 7718 7719 static void hotkey_driver_event(const unsigned int scancode) 7720 { 7721 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 7722 } 7723 7724 /* sysfs name ---------------------------------------------------------- */ 7725 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 7726 struct device_attribute *attr, 7727 char *buf) 7728 { 7729 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 7730 } 7731 7732 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name = 7733 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 7734 7735 /* --------------------------------------------------------------------- */ 7736 7737 /* /proc support */ 7738 static struct proc_dir_entry *proc_dir; 7739 7740 /* 7741 * Module and infrastructure proble, init and exit handling 7742 */ 7743 7744 static int force_load; 7745 7746 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 7747 static const char * __init str_supported(int is_supported) 7748 { 7749 static char text_unsupported[] __initdata = "not supported"; 7750 7751 return (is_supported)? &text_unsupported[4] : &text_unsupported[0]; 7752 } 7753 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 7754 7755 static void ibm_exit(struct ibm_struct *ibm) 7756 { 7757 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 7758 7759 list_del_init(&ibm->all_drivers); 7760 7761 if (ibm->flags.acpi_notify_installed) { 7762 dbg_printk(TPACPI_DBG_EXIT, 7763 "%s: acpi_remove_notify_handler\n", ibm->name); 7764 BUG_ON(!ibm->acpi); 7765 acpi_remove_notify_handler(*ibm->acpi->handle, 7766 ibm->acpi->type, 7767 dispatch_acpi_notify); 7768 ibm->flags.acpi_notify_installed = 0; 7769 ibm->flags.acpi_notify_installed = 0; 7770 } 7771 7772 if (ibm->flags.proc_created) { 7773 dbg_printk(TPACPI_DBG_EXIT, 7774 "%s: remove_proc_entry\n", ibm->name); 7775 remove_proc_entry(ibm->name, proc_dir); 7776 ibm->flags.proc_created = 0; 7777 } 7778 7779 if (ibm->flags.acpi_driver_registered) { 7780 dbg_printk(TPACPI_DBG_EXIT, 7781 "%s: acpi_bus_unregister_driver\n", ibm->name); 7782 BUG_ON(!ibm->acpi); 7783 acpi_bus_unregister_driver(ibm->acpi->driver); 7784 kfree(ibm->acpi->driver); 7785 ibm->acpi->driver = NULL; 7786 ibm->flags.acpi_driver_registered = 0; 7787 } 7788 7789 if (ibm->flags.init_called && ibm->exit) { 7790 ibm->exit(); 7791 ibm->flags.init_called = 0; 7792 } 7793 7794 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 7795 } 7796 7797 static int __init ibm_init(struct ibm_init_struct *iibm) 7798 { 7799 int ret; 7800 struct ibm_struct *ibm = iibm->data; 7801 struct proc_dir_entry *entry; 7802 7803 BUG_ON(ibm == NULL); 7804 7805 INIT_LIST_HEAD(&ibm->all_drivers); 7806 7807 if (ibm->flags.experimental && !experimental) 7808 return 0; 7809 7810 dbg_printk(TPACPI_DBG_INIT, 7811 "probing for %s\n", ibm->name); 7812 7813 if (iibm->init) { 7814 ret = iibm->init(iibm); 7815 if (ret > 0) 7816 return 0; /* probe failed */ 7817 if (ret) 7818 return ret; 7819 7820 ibm->flags.init_called = 1; 7821 } 7822 7823 if (ibm->acpi) { 7824 if (ibm->acpi->hid) { 7825 ret = register_tpacpi_subdriver(ibm); 7826 if (ret) 7827 goto err_out; 7828 } 7829 7830 if (ibm->acpi->notify) { 7831 ret = setup_acpi_notify(ibm); 7832 if (ret == -ENODEV) { 7833 printk(TPACPI_NOTICE "disabling subdriver %s\n", 7834 ibm->name); 7835 ret = 0; 7836 goto err_out; 7837 } 7838 if (ret < 0) 7839 goto err_out; 7840 } 7841 } 7842 7843 dbg_printk(TPACPI_DBG_INIT, 7844 "%s installed\n", ibm->name); 7845 7846 if (ibm->read) { 7847 entry = create_proc_entry(ibm->name, 7848 S_IFREG | S_IRUGO | S_IWUSR, 7849 proc_dir); 7850 if (!entry) { 7851 printk(TPACPI_ERR "unable to create proc entry %s\n", 7852 ibm->name); 7853 ret = -ENODEV; 7854 goto err_out; 7855 } 7856 entry->data = ibm; 7857 entry->read_proc = &dispatch_procfs_read; 7858 if (ibm->write) 7859 entry->write_proc = &dispatch_procfs_write; 7860 ibm->flags.proc_created = 1; 7861 } 7862 7863 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 7864 7865 return 0; 7866 7867 err_out: 7868 dbg_printk(TPACPI_DBG_INIT, 7869 "%s: at error exit path with result %d\n", 7870 ibm->name, ret); 7871 7872 ibm_exit(ibm); 7873 return (ret < 0)? ret : 0; 7874 } 7875 7876 /* Probing */ 7877 7878 static bool __pure __init tpacpi_is_fw_digit(const char c) 7879 { 7880 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 7881 } 7882 7883 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */ 7884 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s, 7885 const char t) 7886 { 7887 return s && strlen(s) >= 8 && 7888 tpacpi_is_fw_digit(s[0]) && 7889 tpacpi_is_fw_digit(s[1]) && 7890 s[2] == t && s[3] == 'T' && 7891 tpacpi_is_fw_digit(s[4]) && 7892 tpacpi_is_fw_digit(s[5]) && 7893 s[6] == 'W' && s[7] == 'W'; 7894 } 7895 7896 /* returns 0 - probe ok, or < 0 - probe error. 7897 * Probe ok doesn't mean thinkpad found. 7898 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 7899 static int __must_check __init get_thinkpad_model_data( 7900 struct thinkpad_id_data *tp) 7901 { 7902 const struct dmi_device *dev = NULL; 7903 char ec_fw_string[18]; 7904 char const *s; 7905 7906 if (!tp) 7907 return -EINVAL; 7908 7909 memset(tp, 0, sizeof(*tp)); 7910 7911 if (dmi_name_in_vendors("IBM")) 7912 tp->vendor = PCI_VENDOR_ID_IBM; 7913 else if (dmi_name_in_vendors("LENOVO")) 7914 tp->vendor = PCI_VENDOR_ID_LENOVO; 7915 else 7916 return 0; 7917 7918 s = dmi_get_system_info(DMI_BIOS_VERSION); 7919 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 7920 if (s && !tp->bios_version_str) 7921 return -ENOMEM; 7922 7923 /* Really ancient ThinkPad 240X will fail this, which is fine */ 7924 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E')) 7925 return 0; 7926 7927 tp->bios_model = tp->bios_version_str[0] 7928 | (tp->bios_version_str[1] << 8); 7929 tp->bios_release = (tp->bios_version_str[4] << 8) 7930 | tp->bios_version_str[5]; 7931 7932 /* 7933 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 7934 * X32 or newer, all Z series; Some models must have an 7935 * up-to-date BIOS or they will not be detected. 7936 * 7937 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 7938 */ 7939 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 7940 if (sscanf(dev->name, 7941 "IBM ThinkPad Embedded Controller -[%17c", 7942 ec_fw_string) == 1) { 7943 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 7944 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 7945 7946 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 7947 if (!tp->ec_version_str) 7948 return -ENOMEM; 7949 7950 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 7951 tp->ec_model = ec_fw_string[0] 7952 | (ec_fw_string[1] << 8); 7953 tp->ec_release = (ec_fw_string[4] << 8) 7954 | ec_fw_string[5]; 7955 } else { 7956 printk(TPACPI_NOTICE 7957 "ThinkPad firmware release %s " 7958 "doesn't match the known patterns\n", 7959 ec_fw_string); 7960 printk(TPACPI_NOTICE 7961 "please report this to %s\n", 7962 TPACPI_MAIL); 7963 } 7964 break; 7965 } 7966 } 7967 7968 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 7969 if (s && !strnicmp(s, "ThinkPad", 8)) { 7970 tp->model_str = kstrdup(s, GFP_KERNEL); 7971 if (!tp->model_str) 7972 return -ENOMEM; 7973 } 7974 7975 s = dmi_get_system_info(DMI_PRODUCT_NAME); 7976 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 7977 if (s && !tp->nummodel_str) 7978 return -ENOMEM; 7979 7980 return 0; 7981 } 7982 7983 static int __init probe_for_thinkpad(void) 7984 { 7985 int is_thinkpad; 7986 7987 if (acpi_disabled) 7988 return -ENODEV; 7989 7990 /* 7991 * Non-ancient models have better DMI tagging, but very old models 7992 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 7993 */ 7994 is_thinkpad = (thinkpad_id.model_str != NULL) || 7995 (thinkpad_id.ec_model != 0) || 7996 tpacpi_is_fw_known(); 7997 7998 /* ec is required because many other handles are relative to it */ 7999 TPACPI_ACPIHANDLE_INIT(ec); 8000 if (!ec_handle) { 8001 if (is_thinkpad) 8002 printk(TPACPI_ERR 8003 "Not yet supported ThinkPad detected!\n"); 8004 return -ENODEV; 8005 } 8006 8007 if (!is_thinkpad && !force_load) 8008 return -ENODEV; 8009 8010 return 0; 8011 } 8012 8013 8014 /* Module init, exit, parameters */ 8015 8016 static struct ibm_init_struct ibms_init[] __initdata = { 8017 { 8018 .init = thinkpad_acpi_driver_init, 8019 .data = &thinkpad_acpi_driver_data, 8020 }, 8021 { 8022 .init = hotkey_init, 8023 .data = &hotkey_driver_data, 8024 }, 8025 { 8026 .init = bluetooth_init, 8027 .data = &bluetooth_driver_data, 8028 }, 8029 { 8030 .init = wan_init, 8031 .data = &wan_driver_data, 8032 }, 8033 { 8034 .init = uwb_init, 8035 .data = &uwb_driver_data, 8036 }, 8037 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 8038 { 8039 .init = video_init, 8040 .data = &video_driver_data, 8041 }, 8042 #endif 8043 { 8044 .init = light_init, 8045 .data = &light_driver_data, 8046 }, 8047 { 8048 .init = cmos_init, 8049 .data = &cmos_driver_data, 8050 }, 8051 { 8052 .init = led_init, 8053 .data = &led_driver_data, 8054 }, 8055 { 8056 .init = beep_init, 8057 .data = &beep_driver_data, 8058 }, 8059 { 8060 .init = thermal_init, 8061 .data = &thermal_driver_data, 8062 }, 8063 { 8064 .data = &ecdump_driver_data, 8065 }, 8066 { 8067 .init = brightness_init, 8068 .data = &brightness_driver_data, 8069 }, 8070 { 8071 .data = &volume_driver_data, 8072 }, 8073 { 8074 .init = fan_init, 8075 .data = &fan_driver_data, 8076 }, 8077 }; 8078 8079 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 8080 { 8081 unsigned int i; 8082 struct ibm_struct *ibm; 8083 8084 if (!kp || !kp->name || !val) 8085 return -EINVAL; 8086 8087 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 8088 ibm = ibms_init[i].data; 8089 WARN_ON(ibm == NULL); 8090 8091 if (!ibm || !ibm->name) 8092 continue; 8093 8094 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 8095 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 8096 return -ENOSPC; 8097 strcpy(ibms_init[i].param, val); 8098 strcat(ibms_init[i].param, ","); 8099 return 0; 8100 } 8101 } 8102 8103 return -EINVAL; 8104 } 8105 8106 module_param(experimental, int, 0); 8107 MODULE_PARM_DESC(experimental, 8108 "Enables experimental features when non-zero"); 8109 8110 module_param_named(debug, dbg_level, uint, 0); 8111 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 8112 8113 module_param(force_load, bool, 0); 8114 MODULE_PARM_DESC(force_load, 8115 "Attempts to load the driver even on a " 8116 "mis-identified ThinkPad when true"); 8117 8118 module_param_named(fan_control, fan_control_allowed, bool, 0); 8119 MODULE_PARM_DESC(fan_control, 8120 "Enables setting fan parameters features when true"); 8121 8122 module_param_named(brightness_mode, brightness_mode, uint, 0); 8123 MODULE_PARM_DESC(brightness_mode, 8124 "Selects brightness control strategy: " 8125 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 8126 8127 module_param(brightness_enable, uint, 0); 8128 MODULE_PARM_DESC(brightness_enable, 8129 "Enables backlight control when 1, disables when 0"); 8130 8131 module_param(hotkey_report_mode, uint, 0); 8132 MODULE_PARM_DESC(hotkey_report_mode, 8133 "used for backwards compatibility with userspace, " 8134 "see documentation"); 8135 8136 #define TPACPI_PARAM(feature) \ 8137 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 8138 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 8139 "at module load, see documentation") 8140 8141 TPACPI_PARAM(hotkey); 8142 TPACPI_PARAM(bluetooth); 8143 TPACPI_PARAM(video); 8144 TPACPI_PARAM(light); 8145 TPACPI_PARAM(cmos); 8146 TPACPI_PARAM(led); 8147 TPACPI_PARAM(beep); 8148 TPACPI_PARAM(ecdump); 8149 TPACPI_PARAM(brightness); 8150 TPACPI_PARAM(volume); 8151 TPACPI_PARAM(fan); 8152 8153 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 8154 module_param(dbg_wlswemul, uint, 0); 8155 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 8156 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 8157 MODULE_PARM_DESC(wlsw_state, 8158 "Initial state of the emulated WLSW switch"); 8159 8160 module_param(dbg_bluetoothemul, uint, 0); 8161 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 8162 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 8163 MODULE_PARM_DESC(bluetooth_state, 8164 "Initial state of the emulated bluetooth switch"); 8165 8166 module_param(dbg_wwanemul, uint, 0); 8167 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 8168 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 8169 MODULE_PARM_DESC(wwan_state, 8170 "Initial state of the emulated WWAN switch"); 8171 8172 module_param(dbg_uwbemul, uint, 0); 8173 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 8174 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 8175 MODULE_PARM_DESC(uwb_state, 8176 "Initial state of the emulated UWB switch"); 8177 #endif 8178 8179 static void thinkpad_acpi_module_exit(void) 8180 { 8181 struct ibm_struct *ibm, *itmp; 8182 8183 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 8184 8185 list_for_each_entry_safe_reverse(ibm, itmp, 8186 &tpacpi_all_drivers, 8187 all_drivers) { 8188 ibm_exit(ibm); 8189 } 8190 8191 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 8192 8193 if (tpacpi_inputdev) { 8194 if (tp_features.input_device_registered) 8195 input_unregister_device(tpacpi_inputdev); 8196 else 8197 input_free_device(tpacpi_inputdev); 8198 } 8199 8200 if (tpacpi_hwmon) 8201 hwmon_device_unregister(tpacpi_hwmon); 8202 8203 if (tp_features.sensors_pdev_attrs_registered) 8204 device_remove_file(&tpacpi_sensors_pdev->dev, 8205 &dev_attr_thinkpad_acpi_pdev_name); 8206 if (tpacpi_sensors_pdev) 8207 platform_device_unregister(tpacpi_sensors_pdev); 8208 if (tpacpi_pdev) 8209 platform_device_unregister(tpacpi_pdev); 8210 8211 if (tp_features.sensors_pdrv_attrs_registered) 8212 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 8213 if (tp_features.platform_drv_attrs_registered) 8214 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 8215 8216 if (tp_features.sensors_pdrv_registered) 8217 platform_driver_unregister(&tpacpi_hwmon_pdriver); 8218 8219 if (tp_features.platform_drv_registered) 8220 platform_driver_unregister(&tpacpi_pdriver); 8221 8222 if (proc_dir) 8223 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 8224 8225 if (tpacpi_wq) 8226 destroy_workqueue(tpacpi_wq); 8227 8228 kfree(thinkpad_id.bios_version_str); 8229 kfree(thinkpad_id.ec_version_str); 8230 kfree(thinkpad_id.model_str); 8231 } 8232 8233 8234 static int __init thinkpad_acpi_module_init(void) 8235 { 8236 int ret, i; 8237 8238 tpacpi_lifecycle = TPACPI_LIFE_INIT; 8239 8240 /* Parameter checking */ 8241 if (hotkey_report_mode > 2) 8242 return -EINVAL; 8243 8244 /* Driver-level probe */ 8245 8246 ret = get_thinkpad_model_data(&thinkpad_id); 8247 if (ret) { 8248 printk(TPACPI_ERR 8249 "unable to get DMI data: %d\n", ret); 8250 thinkpad_acpi_module_exit(); 8251 return ret; 8252 } 8253 ret = probe_for_thinkpad(); 8254 if (ret) { 8255 thinkpad_acpi_module_exit(); 8256 return ret; 8257 } 8258 8259 /* Driver initialization */ 8260 8261 TPACPI_ACPIHANDLE_INIT(ecrd); 8262 TPACPI_ACPIHANDLE_INIT(ecwr); 8263 8264 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 8265 if (!tpacpi_wq) { 8266 thinkpad_acpi_module_exit(); 8267 return -ENOMEM; 8268 } 8269 8270 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 8271 if (!proc_dir) { 8272 printk(TPACPI_ERR 8273 "unable to create proc dir " TPACPI_PROC_DIR); 8274 thinkpad_acpi_module_exit(); 8275 return -ENODEV; 8276 } 8277 8278 ret = platform_driver_register(&tpacpi_pdriver); 8279 if (ret) { 8280 printk(TPACPI_ERR 8281 "unable to register main platform driver\n"); 8282 thinkpad_acpi_module_exit(); 8283 return ret; 8284 } 8285 tp_features.platform_drv_registered = 1; 8286 8287 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 8288 if (ret) { 8289 printk(TPACPI_ERR 8290 "unable to register hwmon platform driver\n"); 8291 thinkpad_acpi_module_exit(); 8292 return ret; 8293 } 8294 tp_features.sensors_pdrv_registered = 1; 8295 8296 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 8297 if (!ret) { 8298 tp_features.platform_drv_attrs_registered = 1; 8299 ret = tpacpi_create_driver_attributes( 8300 &tpacpi_hwmon_pdriver.driver); 8301 } 8302 if (ret) { 8303 printk(TPACPI_ERR 8304 "unable to create sysfs driver attributes\n"); 8305 thinkpad_acpi_module_exit(); 8306 return ret; 8307 } 8308 tp_features.sensors_pdrv_attrs_registered = 1; 8309 8310 8311 /* Device initialization */ 8312 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 8313 NULL, 0); 8314 if (IS_ERR(tpacpi_pdev)) { 8315 ret = PTR_ERR(tpacpi_pdev); 8316 tpacpi_pdev = NULL; 8317 printk(TPACPI_ERR "unable to register platform device\n"); 8318 thinkpad_acpi_module_exit(); 8319 return ret; 8320 } 8321 tpacpi_sensors_pdev = platform_device_register_simple( 8322 TPACPI_HWMON_DRVR_NAME, 8323 -1, NULL, 0); 8324 if (IS_ERR(tpacpi_sensors_pdev)) { 8325 ret = PTR_ERR(tpacpi_sensors_pdev); 8326 tpacpi_sensors_pdev = NULL; 8327 printk(TPACPI_ERR 8328 "unable to register hwmon platform device\n"); 8329 thinkpad_acpi_module_exit(); 8330 return ret; 8331 } 8332 ret = device_create_file(&tpacpi_sensors_pdev->dev, 8333 &dev_attr_thinkpad_acpi_pdev_name); 8334 if (ret) { 8335 printk(TPACPI_ERR 8336 "unable to create sysfs hwmon device attributes\n"); 8337 thinkpad_acpi_module_exit(); 8338 return ret; 8339 } 8340 tp_features.sensors_pdev_attrs_registered = 1; 8341 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 8342 if (IS_ERR(tpacpi_hwmon)) { 8343 ret = PTR_ERR(tpacpi_hwmon); 8344 tpacpi_hwmon = NULL; 8345 printk(TPACPI_ERR "unable to register hwmon device\n"); 8346 thinkpad_acpi_module_exit(); 8347 return ret; 8348 } 8349 mutex_init(&tpacpi_inputdev_send_mutex); 8350 tpacpi_inputdev = input_allocate_device(); 8351 if (!tpacpi_inputdev) { 8352 printk(TPACPI_ERR "unable to allocate input device\n"); 8353 thinkpad_acpi_module_exit(); 8354 return -ENOMEM; 8355 } else { 8356 /* Prepare input device, but don't register */ 8357 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 8358 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 8359 tpacpi_inputdev->id.bustype = BUS_HOST; 8360 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ? 8361 thinkpad_id.vendor : 8362 PCI_VENDOR_ID_IBM; 8363 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 8364 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 8365 } 8366 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 8367 ret = ibm_init(&ibms_init[i]); 8368 if (ret >= 0 && *ibms_init[i].param) 8369 ret = ibms_init[i].data->write(ibms_init[i].param); 8370 if (ret < 0) { 8371 thinkpad_acpi_module_exit(); 8372 return ret; 8373 } 8374 } 8375 ret = input_register_device(tpacpi_inputdev); 8376 if (ret < 0) { 8377 printk(TPACPI_ERR "unable to register input device\n"); 8378 thinkpad_acpi_module_exit(); 8379 return ret; 8380 } else { 8381 tp_features.input_device_registered = 1; 8382 } 8383 8384 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 8385 return 0; 8386 } 8387 8388 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 8389 8390 /* 8391 * This will autoload the driver in almost every ThinkPad 8392 * in widespread use. 8393 * 8394 * Only _VERY_ old models, like the 240, 240x and 570 lack 8395 * the HKEY event interface. 8396 */ 8397 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 8398 8399 /* 8400 * DMI matching for module autoloading 8401 * 8402 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 8403 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 8404 * 8405 * Only models listed in thinkwiki will be supported, so add yours 8406 * if it is not there yet. 8407 */ 8408 #define IBM_BIOS_MODULE_ALIAS(__type) \ 8409 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 8410 8411 /* Ancient thinkpad BIOSes have to be identified by 8412 * BIOS type or model number, and there are far less 8413 * BIOS types than model numbers... */ 8414 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 8415 8416 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 8417 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 8418 MODULE_DESCRIPTION(TPACPI_DESC); 8419 MODULE_VERSION(TPACPI_VERSION); 8420 MODULE_LICENSE("GPL"); 8421 8422 module_init(thinkpad_acpi_module_init); 8423 module_exit(thinkpad_acpi_module_exit); 8424