1 /* 2 * thinkpad_acpi.c - ThinkPad ACPI Extras 3 * 4 * 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net> 6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24 #define TPACPI_VERSION "0.24" 25 #define TPACPI_SYSFS_VERSION 0x020700 26 27 /* 28 * Changelog: 29 * 2007-10-20 changelog trimmed down 30 * 31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 32 * drivers/misc. 33 * 34 * 2006-11-22 0.13 new maintainer 35 * changelog now lives in git commit history, and will 36 * not be updated further in-file. 37 * 38 * 2005-03-17 0.11 support for 600e, 770x 39 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 40 * 41 * 2005-01-16 0.9 use MODULE_VERSION 42 * thanks to Henrik Brix Andersen <brix@gentoo.org> 43 * fix parameter passing on module loading 44 * thanks to Rusty Russell <rusty@rustcorp.com.au> 45 * thanks to Jim Radford <radford@blackbean.org> 46 * 2004-11-08 0.8 fix init error case, don't return from a macro 47 * thanks to Chris Wright <chrisw@osdl.org> 48 */ 49 50 #include <linux/kernel.h> 51 #include <linux/module.h> 52 #include <linux/init.h> 53 #include <linux/types.h> 54 #include <linux/string.h> 55 #include <linux/list.h> 56 #include <linux/mutex.h> 57 #include <linux/sched.h> 58 #include <linux/kthread.h> 59 #include <linux/freezer.h> 60 #include <linux/delay.h> 61 #include <linux/slab.h> 62 63 #include <linux/nvram.h> 64 #include <linux/proc_fs.h> 65 #include <linux/seq_file.h> 66 #include <linux/sysfs.h> 67 #include <linux/backlight.h> 68 #include <linux/fb.h> 69 #include <linux/platform_device.h> 70 #include <linux/hwmon.h> 71 #include <linux/hwmon-sysfs.h> 72 #include <linux/input.h> 73 #include <linux/leds.h> 74 #include <linux/rfkill.h> 75 #include <asm/uaccess.h> 76 77 #include <linux/dmi.h> 78 #include <linux/jiffies.h> 79 #include <linux/workqueue.h> 80 81 #include <sound/core.h> 82 #include <sound/control.h> 83 #include <sound/initval.h> 84 85 #include <acpi/acpi_drivers.h> 86 87 #include <linux/pci_ids.h> 88 89 90 /* ThinkPad CMOS commands */ 91 #define TP_CMOS_VOLUME_DOWN 0 92 #define TP_CMOS_VOLUME_UP 1 93 #define TP_CMOS_VOLUME_MUTE 2 94 #define TP_CMOS_BRIGHTNESS_UP 4 95 #define TP_CMOS_BRIGHTNESS_DOWN 5 96 #define TP_CMOS_THINKLIGHT_ON 12 97 #define TP_CMOS_THINKLIGHT_OFF 13 98 99 /* NVRAM Addresses */ 100 enum tp_nvram_addr { 101 TP_NVRAM_ADDR_HK2 = 0x57, 102 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 103 TP_NVRAM_ADDR_VIDEO = 0x59, 104 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 105 TP_NVRAM_ADDR_MIXER = 0x60, 106 }; 107 108 /* NVRAM bit masks */ 109 enum { 110 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 111 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 112 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 113 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 114 TP_NVRAM_MASK_THINKLIGHT = 0x10, 115 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 116 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 117 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 118 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 119 TP_NVRAM_MASK_MUTE = 0x40, 120 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 121 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 122 TP_NVRAM_POS_LEVEL_VOLUME = 0, 123 }; 124 125 /* Misc NVRAM-related */ 126 enum { 127 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 128 }; 129 130 /* ACPI HIDs */ 131 #define TPACPI_ACPI_HKEY_HID "IBM0068" 132 #define TPACPI_ACPI_EC_HID "PNP0C09" 133 134 /* Input IDs */ 135 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 136 #define TPACPI_HKEY_INPUT_VERSION 0x4101 137 138 /* ACPI \WGSV commands */ 139 enum { 140 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 141 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 142 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 143 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 144 }; 145 146 /* TP_ACPI_WGSV_GET_STATE bits */ 147 enum { 148 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 149 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 150 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 151 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 152 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 153 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 154 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 155 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 156 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 157 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 158 }; 159 160 /* HKEY events */ 161 enum tpacpi_hkey_event_t { 162 /* Hotkey-related */ 163 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 164 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 165 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 166 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 167 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 168 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 169 170 /* Reasons for waking up from S3/S4 */ 171 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 172 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 173 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 174 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 175 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 176 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 177 178 /* Auto-sleep after eject request */ 179 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 180 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 181 182 /* Misc bay events */ 183 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 184 185 /* User-interface events */ 186 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 187 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 188 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 189 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 190 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 191 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 192 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 193 194 /* Thermal events */ 195 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 196 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 197 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 198 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 199 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 200 201 /* Misc */ 202 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 203 }; 204 205 /**************************************************************************** 206 * Main driver 207 */ 208 209 #define TPACPI_NAME "thinkpad" 210 #define TPACPI_DESC "ThinkPad ACPI Extras" 211 #define TPACPI_FILE TPACPI_NAME "_acpi" 212 #define TPACPI_URL "http://ibm-acpi.sf.net/" 213 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 214 215 #define TPACPI_PROC_DIR "ibm" 216 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 217 #define TPACPI_DRVR_NAME TPACPI_FILE 218 #define TPACPI_DRVR_SHORTNAME "tpacpi" 219 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 220 221 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 222 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 223 224 #define TPACPI_MAX_ACPI_ARGS 3 225 226 /* printk headers */ 227 #define TPACPI_LOG TPACPI_FILE ": " 228 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG 229 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG 230 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG 231 #define TPACPI_ERR KERN_ERR TPACPI_LOG 232 #define TPACPI_WARN KERN_WARNING TPACPI_LOG 233 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG 234 #define TPACPI_INFO KERN_INFO TPACPI_LOG 235 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG 236 237 /* Debugging printk groups */ 238 #define TPACPI_DBG_ALL 0xffff 239 #define TPACPI_DBG_DISCLOSETASK 0x8000 240 #define TPACPI_DBG_INIT 0x0001 241 #define TPACPI_DBG_EXIT 0x0002 242 #define TPACPI_DBG_RFKILL 0x0004 243 #define TPACPI_DBG_HKEY 0x0008 244 #define TPACPI_DBG_FAN 0x0010 245 #define TPACPI_DBG_BRGHT 0x0020 246 #define TPACPI_DBG_MIXER 0x0040 247 248 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 249 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 250 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 251 252 253 /**************************************************************************** 254 * Driver-wide structs and misc. variables 255 */ 256 257 struct ibm_struct; 258 259 struct tp_acpi_drv_struct { 260 const struct acpi_device_id *hid; 261 struct acpi_driver *driver; 262 263 void (*notify) (struct ibm_struct *, u32); 264 acpi_handle *handle; 265 u32 type; 266 struct acpi_device *device; 267 }; 268 269 struct ibm_struct { 270 char *name; 271 272 int (*read) (struct seq_file *); 273 int (*write) (char *); 274 void (*exit) (void); 275 void (*resume) (void); 276 void (*suspend) (pm_message_t state); 277 void (*shutdown) (void); 278 279 struct list_head all_drivers; 280 281 struct tp_acpi_drv_struct *acpi; 282 283 struct { 284 u8 acpi_driver_registered:1; 285 u8 acpi_notify_installed:1; 286 u8 proc_created:1; 287 u8 init_called:1; 288 u8 experimental:1; 289 } flags; 290 }; 291 292 struct ibm_init_struct { 293 char param[32]; 294 295 int (*init) (struct ibm_init_struct *); 296 mode_t base_procfs_mode; 297 struct ibm_struct *data; 298 }; 299 300 static struct { 301 u32 bluetooth:1; 302 u32 hotkey:1; 303 u32 hotkey_mask:1; 304 u32 hotkey_wlsw:1; 305 u32 hotkey_tablet:1; 306 u32 light:1; 307 u32 light_status:1; 308 u32 bright_acpimode:1; 309 u32 bright_unkfw:1; 310 u32 wan:1; 311 u32 uwb:1; 312 u32 fan_ctrl_status_undef:1; 313 u32 second_fan:1; 314 u32 beep_needs_two_args:1; 315 u32 mixer_no_level_control:1; 316 u32 input_device_registered:1; 317 u32 platform_drv_registered:1; 318 u32 platform_drv_attrs_registered:1; 319 u32 sensors_pdrv_registered:1; 320 u32 sensors_pdrv_attrs_registered:1; 321 u32 sensors_pdev_attrs_registered:1; 322 u32 hotkey_poll_active:1; 323 } tp_features; 324 325 static struct { 326 u16 hotkey_mask_ff:1; 327 u16 volume_ctrl_forbidden:1; 328 } tp_warned; 329 330 struct thinkpad_id_data { 331 unsigned int vendor; /* ThinkPad vendor: 332 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 333 334 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 335 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 336 337 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 338 u16 ec_model; 339 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 340 u16 ec_release; 341 342 char *model_str; /* ThinkPad T43 */ 343 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 344 }; 345 static struct thinkpad_id_data thinkpad_id; 346 347 static enum { 348 TPACPI_LIFE_INIT = 0, 349 TPACPI_LIFE_RUNNING, 350 TPACPI_LIFE_EXITING, 351 } tpacpi_lifecycle; 352 353 static int experimental; 354 static u32 dbg_level; 355 356 static struct workqueue_struct *tpacpi_wq; 357 358 enum led_status_t { 359 TPACPI_LED_OFF = 0, 360 TPACPI_LED_ON, 361 TPACPI_LED_BLINK, 362 }; 363 364 /* Special LED class that can defer work */ 365 struct tpacpi_led_classdev { 366 struct led_classdev led_classdev; 367 struct work_struct work; 368 enum led_status_t new_state; 369 unsigned int led; 370 }; 371 372 /* brightness level capabilities */ 373 static unsigned int bright_maxlvl; /* 0 = unknown */ 374 375 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 376 static int dbg_wlswemul; 377 static int tpacpi_wlsw_emulstate; 378 static int dbg_bluetoothemul; 379 static int tpacpi_bluetooth_emulstate; 380 static int dbg_wwanemul; 381 static int tpacpi_wwan_emulstate; 382 static int dbg_uwbemul; 383 static int tpacpi_uwb_emulstate; 384 #endif 385 386 387 /************************************************************************* 388 * Debugging helpers 389 */ 390 391 #define dbg_printk(a_dbg_level, format, arg...) \ 392 do { if (dbg_level & (a_dbg_level)) \ 393 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \ 394 } while (0) 395 396 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 397 #define vdbg_printk dbg_printk 398 static const char *str_supported(int is_supported); 399 #else 400 #define vdbg_printk(a_dbg_level, format, arg...) \ 401 do { } while (0) 402 #endif 403 404 static void tpacpi_log_usertask(const char * const what) 405 { 406 printk(TPACPI_DEBUG "%s: access by process with PID %d\n", 407 what, task_tgid_vnr(current)); 408 } 409 410 #define tpacpi_disclose_usertask(what, format, arg...) \ 411 do { \ 412 if (unlikely( \ 413 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 414 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 415 printk(TPACPI_DEBUG "%s: PID %d: " format, \ 416 what, task_tgid_vnr(current), ## arg); \ 417 } \ 418 } while (0) 419 420 /* 421 * Quirk handling helpers 422 * 423 * ThinkPad IDs and versions seen in the field so far 424 * are two-characters from the set [0-9A-Z], i.e. base 36. 425 * 426 * We use values well outside that range as specials. 427 */ 428 429 #define TPACPI_MATCH_ANY 0xffffU 430 #define TPACPI_MATCH_UNKNOWN 0U 431 432 /* TPID('1', 'Y') == 0x5931 */ 433 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 434 435 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 436 { .vendor = PCI_VENDOR_ID_IBM, \ 437 .bios = TPID(__id1, __id2), \ 438 .ec = TPACPI_MATCH_ANY, \ 439 .quirks = (__quirk) } 440 441 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 442 { .vendor = PCI_VENDOR_ID_LENOVO, \ 443 .bios = TPID(__id1, __id2), \ 444 .ec = TPACPI_MATCH_ANY, \ 445 .quirks = (__quirk) } 446 447 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 448 { .vendor = PCI_VENDOR_ID_LENOVO, \ 449 .bios = TPACPI_MATCH_ANY, \ 450 .ec = TPID(__id1, __id2), \ 451 .quirks = (__quirk) } 452 453 struct tpacpi_quirk { 454 unsigned int vendor; 455 u16 bios; 456 u16 ec; 457 unsigned long quirks; 458 }; 459 460 /** 461 * tpacpi_check_quirks() - search BIOS/EC version on a list 462 * @qlist: array of &struct tpacpi_quirk 463 * @qlist_size: number of elements in @qlist 464 * 465 * Iterates over a quirks list until one is found that matches the 466 * ThinkPad's vendor, BIOS and EC model. 467 * 468 * Returns 0 if nothing matches, otherwise returns the quirks field of 469 * the matching &struct tpacpi_quirk entry. 470 * 471 * The match criteria is: vendor, ec and bios much match. 472 */ 473 static unsigned long __init tpacpi_check_quirks( 474 const struct tpacpi_quirk *qlist, 475 unsigned int qlist_size) 476 { 477 while (qlist_size) { 478 if ((qlist->vendor == thinkpad_id.vendor || 479 qlist->vendor == TPACPI_MATCH_ANY) && 480 (qlist->bios == thinkpad_id.bios_model || 481 qlist->bios == TPACPI_MATCH_ANY) && 482 (qlist->ec == thinkpad_id.ec_model || 483 qlist->ec == TPACPI_MATCH_ANY)) 484 return qlist->quirks; 485 486 qlist_size--; 487 qlist++; 488 } 489 return 0; 490 } 491 492 static inline bool __pure __init tpacpi_is_lenovo(void) 493 { 494 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 495 } 496 497 static inline bool __pure __init tpacpi_is_ibm(void) 498 { 499 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 500 } 501 502 /**************************************************************************** 503 **************************************************************************** 504 * 505 * ACPI Helpers and device model 506 * 507 **************************************************************************** 508 ****************************************************************************/ 509 510 /************************************************************************* 511 * ACPI basic handles 512 */ 513 514 static acpi_handle root_handle; 515 static acpi_handle ec_handle; 516 517 #define TPACPI_HANDLE(object, parent, paths...) \ 518 static acpi_handle object##_handle; \ 519 static const acpi_handle *object##_parent __initdata = \ 520 &parent##_handle; \ 521 static char *object##_paths[] __initdata = { paths } 522 523 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 524 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 525 526 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 527 /* T4x, X31, X40 */ 528 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 529 "\\CMS", /* R40, R40e */ 530 ); /* all others */ 531 532 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 533 "^HKEY", /* R30, R31 */ 534 "HKEY", /* all others */ 535 ); /* 570 */ 536 537 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */ 538 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 539 "\\_SB.PCI0.VID0", /* 770e */ 540 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 541 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 542 "\\_SB.PCI0.AGP.VID", /* all others */ 543 ); /* R30, R31 */ 544 545 546 /************************************************************************* 547 * ACPI helpers 548 */ 549 550 static int acpi_evalf(acpi_handle handle, 551 void *res, char *method, char *fmt, ...) 552 { 553 char *fmt0 = fmt; 554 struct acpi_object_list params; 555 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 556 struct acpi_buffer result, *resultp; 557 union acpi_object out_obj; 558 acpi_status status; 559 va_list ap; 560 char res_type; 561 int success; 562 int quiet; 563 564 if (!*fmt) { 565 printk(TPACPI_ERR "acpi_evalf() called with empty format\n"); 566 return 0; 567 } 568 569 if (*fmt == 'q') { 570 quiet = 1; 571 fmt++; 572 } else 573 quiet = 0; 574 575 res_type = *(fmt++); 576 577 params.count = 0; 578 params.pointer = &in_objs[0]; 579 580 va_start(ap, fmt); 581 while (*fmt) { 582 char c = *(fmt++); 583 switch (c) { 584 case 'd': /* int */ 585 in_objs[params.count].integer.value = va_arg(ap, int); 586 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 587 break; 588 /* add more types as needed */ 589 default: 590 printk(TPACPI_ERR "acpi_evalf() called " 591 "with invalid format character '%c'\n", c); 592 return 0; 593 } 594 } 595 va_end(ap); 596 597 if (res_type != 'v') { 598 result.length = sizeof(out_obj); 599 result.pointer = &out_obj; 600 resultp = &result; 601 } else 602 resultp = NULL; 603 604 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 605 606 switch (res_type) { 607 case 'd': /* int */ 608 success = (status == AE_OK && 609 out_obj.type == ACPI_TYPE_INTEGER); 610 if (success && res) 611 *(int *)res = out_obj.integer.value; 612 break; 613 case 'v': /* void */ 614 success = status == AE_OK; 615 break; 616 /* add more types as needed */ 617 default: 618 printk(TPACPI_ERR "acpi_evalf() called " 619 "with invalid format character '%c'\n", res_type); 620 return 0; 621 } 622 623 if (!success && !quiet) 624 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %s\n", 625 method, fmt0, acpi_format_exception(status)); 626 627 return success; 628 } 629 630 static int acpi_ec_read(int i, u8 *p) 631 { 632 int v; 633 634 if (ecrd_handle) { 635 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 636 return 0; 637 *p = v; 638 } else { 639 if (ec_read(i, p) < 0) 640 return 0; 641 } 642 643 return 1; 644 } 645 646 static int acpi_ec_write(int i, u8 v) 647 { 648 if (ecwr_handle) { 649 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 650 return 0; 651 } else { 652 if (ec_write(i, v) < 0) 653 return 0; 654 } 655 656 return 1; 657 } 658 659 static int issue_thinkpad_cmos_command(int cmos_cmd) 660 { 661 if (!cmos_handle) 662 return -ENXIO; 663 664 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 665 return -EIO; 666 667 return 0; 668 } 669 670 /************************************************************************* 671 * ACPI device model 672 */ 673 674 #define TPACPI_ACPIHANDLE_INIT(object) \ 675 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 676 object##_paths, ARRAY_SIZE(object##_paths)) 677 678 static void __init drv_acpi_handle_init(const char *name, 679 acpi_handle *handle, const acpi_handle parent, 680 char **paths, const int num_paths) 681 { 682 int i; 683 acpi_status status; 684 685 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 686 name); 687 688 for (i = 0; i < num_paths; i++) { 689 status = acpi_get_handle(parent, paths[i], handle); 690 if (ACPI_SUCCESS(status)) { 691 dbg_printk(TPACPI_DBG_INIT, 692 "Found ACPI handle %s for %s\n", 693 paths[i], name); 694 return; 695 } 696 } 697 698 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 699 name); 700 *handle = NULL; 701 } 702 703 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 704 u32 level, void *context, void **return_value) 705 { 706 *(acpi_handle *)return_value = handle; 707 708 return AE_CTRL_TERMINATE; 709 } 710 711 static void __init tpacpi_acpi_handle_locate(const char *name, 712 const char *hid, 713 acpi_handle *handle) 714 { 715 acpi_status status; 716 acpi_handle device_found; 717 718 BUG_ON(!name || !hid || !handle); 719 vdbg_printk(TPACPI_DBG_INIT, 720 "trying to locate ACPI handle for %s, using HID %s\n", 721 name, hid); 722 723 memset(&device_found, 0, sizeof(device_found)); 724 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 725 (void *)name, &device_found); 726 727 *handle = NULL; 728 729 if (ACPI_SUCCESS(status)) { 730 *handle = device_found; 731 dbg_printk(TPACPI_DBG_INIT, 732 "Found ACPI handle for %s\n", name); 733 } else { 734 vdbg_printk(TPACPI_DBG_INIT, 735 "Could not locate an ACPI handle for %s: %s\n", 736 name, acpi_format_exception(status)); 737 } 738 } 739 740 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 741 { 742 struct ibm_struct *ibm = data; 743 744 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 745 return; 746 747 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 748 return; 749 750 ibm->acpi->notify(ibm, event); 751 } 752 753 static int __init setup_acpi_notify(struct ibm_struct *ibm) 754 { 755 acpi_status status; 756 int rc; 757 758 BUG_ON(!ibm->acpi); 759 760 if (!*ibm->acpi->handle) 761 return 0; 762 763 vdbg_printk(TPACPI_DBG_INIT, 764 "setting up ACPI notify for %s\n", ibm->name); 765 766 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 767 if (rc < 0) { 768 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n", 769 ibm->name, rc); 770 return -ENODEV; 771 } 772 773 ibm->acpi->device->driver_data = ibm; 774 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 775 TPACPI_ACPI_EVENT_PREFIX, 776 ibm->name); 777 778 status = acpi_install_notify_handler(*ibm->acpi->handle, 779 ibm->acpi->type, dispatch_acpi_notify, ibm); 780 if (ACPI_FAILURE(status)) { 781 if (status == AE_ALREADY_EXISTS) { 782 printk(TPACPI_NOTICE 783 "another device driver is already " 784 "handling %s events\n", ibm->name); 785 } else { 786 printk(TPACPI_ERR 787 "acpi_install_notify_handler(%s) failed: %s\n", 788 ibm->name, acpi_format_exception(status)); 789 } 790 return -ENODEV; 791 } 792 ibm->flags.acpi_notify_installed = 1; 793 return 0; 794 } 795 796 static int __init tpacpi_device_add(struct acpi_device *device) 797 { 798 return 0; 799 } 800 801 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 802 { 803 int rc; 804 805 dbg_printk(TPACPI_DBG_INIT, 806 "registering %s as an ACPI driver\n", ibm->name); 807 808 BUG_ON(!ibm->acpi); 809 810 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 811 if (!ibm->acpi->driver) { 812 printk(TPACPI_ERR 813 "failed to allocate memory for ibm->acpi->driver\n"); 814 return -ENOMEM; 815 } 816 817 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 818 ibm->acpi->driver->ids = ibm->acpi->hid; 819 820 ibm->acpi->driver->ops.add = &tpacpi_device_add; 821 822 rc = acpi_bus_register_driver(ibm->acpi->driver); 823 if (rc < 0) { 824 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n", 825 ibm->name, rc); 826 kfree(ibm->acpi->driver); 827 ibm->acpi->driver = NULL; 828 } else if (!rc) 829 ibm->flags.acpi_driver_registered = 1; 830 831 return rc; 832 } 833 834 835 /**************************************************************************** 836 **************************************************************************** 837 * 838 * Procfs Helpers 839 * 840 **************************************************************************** 841 ****************************************************************************/ 842 843 static int dispatch_proc_show(struct seq_file *m, void *v) 844 { 845 struct ibm_struct *ibm = m->private; 846 847 if (!ibm || !ibm->read) 848 return -EINVAL; 849 return ibm->read(m); 850 } 851 852 static int dispatch_proc_open(struct inode *inode, struct file *file) 853 { 854 return single_open(file, dispatch_proc_show, PDE(inode)->data); 855 } 856 857 static ssize_t dispatch_proc_write(struct file *file, 858 const char __user *userbuf, 859 size_t count, loff_t *pos) 860 { 861 struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data; 862 char *kernbuf; 863 int ret; 864 865 if (!ibm || !ibm->write) 866 return -EINVAL; 867 if (count > PAGE_SIZE - 2) 868 return -EINVAL; 869 870 kernbuf = kmalloc(count + 2, GFP_KERNEL); 871 if (!kernbuf) 872 return -ENOMEM; 873 874 if (copy_from_user(kernbuf, userbuf, count)) { 875 kfree(kernbuf); 876 return -EFAULT; 877 } 878 879 kernbuf[count] = 0; 880 strcat(kernbuf, ","); 881 ret = ibm->write(kernbuf); 882 if (ret == 0) 883 ret = count; 884 885 kfree(kernbuf); 886 887 return ret; 888 } 889 890 static const struct file_operations dispatch_proc_fops = { 891 .owner = THIS_MODULE, 892 .open = dispatch_proc_open, 893 .read = seq_read, 894 .llseek = seq_lseek, 895 .release = single_release, 896 .write = dispatch_proc_write, 897 }; 898 899 static char *next_cmd(char **cmds) 900 { 901 char *start = *cmds; 902 char *end; 903 904 while ((end = strchr(start, ',')) && end == start) 905 start = end + 1; 906 907 if (!end) 908 return NULL; 909 910 *end = 0; 911 *cmds = end + 1; 912 return start; 913 } 914 915 916 /**************************************************************************** 917 **************************************************************************** 918 * 919 * Device model: input, hwmon and platform 920 * 921 **************************************************************************** 922 ****************************************************************************/ 923 924 static struct platform_device *tpacpi_pdev; 925 static struct platform_device *tpacpi_sensors_pdev; 926 static struct device *tpacpi_hwmon; 927 static struct input_dev *tpacpi_inputdev; 928 static struct mutex tpacpi_inputdev_send_mutex; 929 static LIST_HEAD(tpacpi_all_drivers); 930 931 static int tpacpi_suspend_handler(struct platform_device *pdev, 932 pm_message_t state) 933 { 934 struct ibm_struct *ibm, *itmp; 935 936 list_for_each_entry_safe(ibm, itmp, 937 &tpacpi_all_drivers, 938 all_drivers) { 939 if (ibm->suspend) 940 (ibm->suspend)(state); 941 } 942 943 return 0; 944 } 945 946 static int tpacpi_resume_handler(struct platform_device *pdev) 947 { 948 struct ibm_struct *ibm, *itmp; 949 950 list_for_each_entry_safe(ibm, itmp, 951 &tpacpi_all_drivers, 952 all_drivers) { 953 if (ibm->resume) 954 (ibm->resume)(); 955 } 956 957 return 0; 958 } 959 960 static void tpacpi_shutdown_handler(struct platform_device *pdev) 961 { 962 struct ibm_struct *ibm, *itmp; 963 964 list_for_each_entry_safe(ibm, itmp, 965 &tpacpi_all_drivers, 966 all_drivers) { 967 if (ibm->shutdown) 968 (ibm->shutdown)(); 969 } 970 } 971 972 static struct platform_driver tpacpi_pdriver = { 973 .driver = { 974 .name = TPACPI_DRVR_NAME, 975 .owner = THIS_MODULE, 976 }, 977 .suspend = tpacpi_suspend_handler, 978 .resume = tpacpi_resume_handler, 979 .shutdown = tpacpi_shutdown_handler, 980 }; 981 982 static struct platform_driver tpacpi_hwmon_pdriver = { 983 .driver = { 984 .name = TPACPI_HWMON_DRVR_NAME, 985 .owner = THIS_MODULE, 986 }, 987 }; 988 989 /************************************************************************* 990 * sysfs support helpers 991 */ 992 993 struct attribute_set { 994 unsigned int members, max_members; 995 struct attribute_group group; 996 }; 997 998 struct attribute_set_obj { 999 struct attribute_set s; 1000 struct attribute *a; 1001 } __attribute__((packed)); 1002 1003 static struct attribute_set *create_attr_set(unsigned int max_members, 1004 const char *name) 1005 { 1006 struct attribute_set_obj *sobj; 1007 1008 if (max_members == 0) 1009 return NULL; 1010 1011 /* Allocates space for implicit NULL at the end too */ 1012 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1013 max_members * sizeof(struct attribute *), 1014 GFP_KERNEL); 1015 if (!sobj) 1016 return NULL; 1017 sobj->s.max_members = max_members; 1018 sobj->s.group.attrs = &sobj->a; 1019 sobj->s.group.name = name; 1020 1021 return &sobj->s; 1022 } 1023 1024 #define destroy_attr_set(_set) \ 1025 kfree(_set); 1026 1027 /* not multi-threaded safe, use it in a single thread per set */ 1028 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1029 { 1030 if (!s || !attr) 1031 return -EINVAL; 1032 1033 if (s->members >= s->max_members) 1034 return -ENOMEM; 1035 1036 s->group.attrs[s->members] = attr; 1037 s->members++; 1038 1039 return 0; 1040 } 1041 1042 static int add_many_to_attr_set(struct attribute_set *s, 1043 struct attribute **attr, 1044 unsigned int count) 1045 { 1046 int i, res; 1047 1048 for (i = 0; i < count; i++) { 1049 res = add_to_attr_set(s, attr[i]); 1050 if (res) 1051 return res; 1052 } 1053 1054 return 0; 1055 } 1056 1057 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1058 { 1059 sysfs_remove_group(kobj, &s->group); 1060 destroy_attr_set(s); 1061 } 1062 1063 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1064 sysfs_create_group(_kobj, &_attr_set->group) 1065 1066 static int parse_strtoul(const char *buf, 1067 unsigned long max, unsigned long *value) 1068 { 1069 char *endp; 1070 1071 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1072 endp = skip_spaces(endp); 1073 if (*endp || *value > max) 1074 return -EINVAL; 1075 1076 return 0; 1077 } 1078 1079 static void tpacpi_disable_brightness_delay(void) 1080 { 1081 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1082 printk(TPACPI_NOTICE 1083 "ACPI backlight control delay disabled\n"); 1084 } 1085 1086 static void printk_deprecated_attribute(const char * const what, 1087 const char * const details) 1088 { 1089 tpacpi_log_usertask("deprecated sysfs attribute"); 1090 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and " 1091 "will be removed. %s\n", 1092 what, details); 1093 } 1094 1095 /************************************************************************* 1096 * rfkill and radio control support helpers 1097 */ 1098 1099 /* 1100 * ThinkPad-ACPI firmware handling model: 1101 * 1102 * WLSW (master wireless switch) is event-driven, and is common to all 1103 * firmware-controlled radios. It cannot be controlled, just monitored, 1104 * as expected. It overrides all radio state in firmware 1105 * 1106 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1107 * (TODO: verify how WLSW interacts with the returned radio state). 1108 * 1109 * The only time there are shadow radio state changes, is when 1110 * masked-off hotkeys are used. 1111 */ 1112 1113 /* 1114 * Internal driver API for radio state: 1115 * 1116 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1117 * bool: true means radio blocked (off) 1118 */ 1119 enum tpacpi_rfkill_state { 1120 TPACPI_RFK_RADIO_OFF = 0, 1121 TPACPI_RFK_RADIO_ON 1122 }; 1123 1124 /* rfkill switches */ 1125 enum tpacpi_rfk_id { 1126 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1127 TPACPI_RFK_WWAN_SW_ID, 1128 TPACPI_RFK_UWB_SW_ID, 1129 TPACPI_RFK_SW_MAX 1130 }; 1131 1132 static const char *tpacpi_rfkill_names[] = { 1133 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1134 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1135 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1136 [TPACPI_RFK_SW_MAX] = NULL 1137 }; 1138 1139 /* ThinkPad-ACPI rfkill subdriver */ 1140 struct tpacpi_rfk { 1141 struct rfkill *rfkill; 1142 enum tpacpi_rfk_id id; 1143 const struct tpacpi_rfk_ops *ops; 1144 }; 1145 1146 struct tpacpi_rfk_ops { 1147 /* firmware interface */ 1148 int (*get_status)(void); 1149 int (*set_status)(const enum tpacpi_rfkill_state); 1150 }; 1151 1152 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1153 1154 /* Query FW and update rfkill sw state for a given rfkill switch */ 1155 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1156 { 1157 int status; 1158 1159 if (!tp_rfk) 1160 return -ENODEV; 1161 1162 status = (tp_rfk->ops->get_status)(); 1163 if (status < 0) 1164 return status; 1165 1166 rfkill_set_sw_state(tp_rfk->rfkill, 1167 (status == TPACPI_RFK_RADIO_OFF)); 1168 1169 return status; 1170 } 1171 1172 /* Query FW and update rfkill sw state for all rfkill switches */ 1173 static void tpacpi_rfk_update_swstate_all(void) 1174 { 1175 unsigned int i; 1176 1177 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1178 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1179 } 1180 1181 /* 1182 * Sync the HW-blocking state of all rfkill switches, 1183 * do notice it causes the rfkill core to schedule uevents 1184 */ 1185 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1186 { 1187 unsigned int i; 1188 struct tpacpi_rfk *tp_rfk; 1189 1190 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1191 tp_rfk = tpacpi_rfkill_switches[i]; 1192 if (tp_rfk) { 1193 if (rfkill_set_hw_state(tp_rfk->rfkill, 1194 blocked)) { 1195 /* ignore -- we track sw block */ 1196 } 1197 } 1198 } 1199 } 1200 1201 /* Call to get the WLSW state from the firmware */ 1202 static int hotkey_get_wlsw(void); 1203 1204 /* Call to query WLSW state and update all rfkill switches */ 1205 static bool tpacpi_rfk_check_hwblock_state(void) 1206 { 1207 int res = hotkey_get_wlsw(); 1208 int hw_blocked; 1209 1210 /* When unknown or unsupported, we have to assume it is unblocked */ 1211 if (res < 0) 1212 return false; 1213 1214 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1215 tpacpi_rfk_update_hwblock_state(hw_blocked); 1216 1217 return hw_blocked; 1218 } 1219 1220 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1221 { 1222 struct tpacpi_rfk *tp_rfk = data; 1223 int res; 1224 1225 dbg_printk(TPACPI_DBG_RFKILL, 1226 "request to change radio state to %s\n", 1227 blocked ? "blocked" : "unblocked"); 1228 1229 /* try to set radio state */ 1230 res = (tp_rfk->ops->set_status)(blocked ? 1231 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1232 1233 /* and update the rfkill core with whatever the FW really did */ 1234 tpacpi_rfk_update_swstate(tp_rfk); 1235 1236 return (res < 0) ? res : 0; 1237 } 1238 1239 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1240 .set_block = tpacpi_rfk_hook_set_block, 1241 }; 1242 1243 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1244 const struct tpacpi_rfk_ops *tp_rfkops, 1245 const enum rfkill_type rfktype, 1246 const char *name, 1247 const bool set_default) 1248 { 1249 struct tpacpi_rfk *atp_rfk; 1250 int res; 1251 bool sw_state = false; 1252 bool hw_state; 1253 int sw_status; 1254 1255 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1256 1257 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1258 if (atp_rfk) 1259 atp_rfk->rfkill = rfkill_alloc(name, 1260 &tpacpi_pdev->dev, 1261 rfktype, 1262 &tpacpi_rfk_rfkill_ops, 1263 atp_rfk); 1264 if (!atp_rfk || !atp_rfk->rfkill) { 1265 printk(TPACPI_ERR 1266 "failed to allocate memory for rfkill class\n"); 1267 kfree(atp_rfk); 1268 return -ENOMEM; 1269 } 1270 1271 atp_rfk->id = id; 1272 atp_rfk->ops = tp_rfkops; 1273 1274 sw_status = (tp_rfkops->get_status)(); 1275 if (sw_status < 0) { 1276 printk(TPACPI_ERR 1277 "failed to read initial state for %s, error %d\n", 1278 name, sw_status); 1279 } else { 1280 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1281 if (set_default) { 1282 /* try to keep the initial state, since we ask the 1283 * firmware to preserve it across S5 in NVRAM */ 1284 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1285 } 1286 } 1287 hw_state = tpacpi_rfk_check_hwblock_state(); 1288 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1289 1290 res = rfkill_register(atp_rfk->rfkill); 1291 if (res < 0) { 1292 printk(TPACPI_ERR 1293 "failed to register %s rfkill switch: %d\n", 1294 name, res); 1295 rfkill_destroy(atp_rfk->rfkill); 1296 kfree(atp_rfk); 1297 return res; 1298 } 1299 1300 tpacpi_rfkill_switches[id] = atp_rfk; 1301 1302 printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n", 1303 name, (sw_state || hw_state) ? "" : "un"); 1304 return 0; 1305 } 1306 1307 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1308 { 1309 struct tpacpi_rfk *tp_rfk; 1310 1311 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1312 1313 tp_rfk = tpacpi_rfkill_switches[id]; 1314 if (tp_rfk) { 1315 rfkill_unregister(tp_rfk->rfkill); 1316 rfkill_destroy(tp_rfk->rfkill); 1317 tpacpi_rfkill_switches[id] = NULL; 1318 kfree(tp_rfk); 1319 } 1320 } 1321 1322 static void printk_deprecated_rfkill_attribute(const char * const what) 1323 { 1324 printk_deprecated_attribute(what, 1325 "Please switch to generic rfkill before year 2010"); 1326 } 1327 1328 /* sysfs <radio> enable ------------------------------------------------ */ 1329 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1330 struct device_attribute *attr, 1331 char *buf) 1332 { 1333 int status; 1334 1335 printk_deprecated_rfkill_attribute(attr->attr.name); 1336 1337 /* This is in the ABI... */ 1338 if (tpacpi_rfk_check_hwblock_state()) { 1339 status = TPACPI_RFK_RADIO_OFF; 1340 } else { 1341 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1342 if (status < 0) 1343 return status; 1344 } 1345 1346 return snprintf(buf, PAGE_SIZE, "%d\n", 1347 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1348 } 1349 1350 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1351 struct device_attribute *attr, 1352 const char *buf, size_t count) 1353 { 1354 unsigned long t; 1355 int res; 1356 1357 printk_deprecated_rfkill_attribute(attr->attr.name); 1358 1359 if (parse_strtoul(buf, 1, &t)) 1360 return -EINVAL; 1361 1362 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1363 1364 /* This is in the ABI... */ 1365 if (tpacpi_rfk_check_hwblock_state() && !!t) 1366 return -EPERM; 1367 1368 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1369 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1370 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1371 1372 return (res < 0) ? res : count; 1373 } 1374 1375 /* procfs -------------------------------------------------------------- */ 1376 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1377 { 1378 if (id >= TPACPI_RFK_SW_MAX) 1379 seq_printf(m, "status:\t\tnot supported\n"); 1380 else { 1381 int status; 1382 1383 /* This is in the ABI... */ 1384 if (tpacpi_rfk_check_hwblock_state()) { 1385 status = TPACPI_RFK_RADIO_OFF; 1386 } else { 1387 status = tpacpi_rfk_update_swstate( 1388 tpacpi_rfkill_switches[id]); 1389 if (status < 0) 1390 return status; 1391 } 1392 1393 seq_printf(m, "status:\t\t%s\n", 1394 (status == TPACPI_RFK_RADIO_ON) ? 1395 "enabled" : "disabled"); 1396 seq_printf(m, "commands:\tenable, disable\n"); 1397 } 1398 1399 return 0; 1400 } 1401 1402 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1403 { 1404 char *cmd; 1405 int status = -1; 1406 int res = 0; 1407 1408 if (id >= TPACPI_RFK_SW_MAX) 1409 return -ENODEV; 1410 1411 while ((cmd = next_cmd(&buf))) { 1412 if (strlencmp(cmd, "enable") == 0) 1413 status = TPACPI_RFK_RADIO_ON; 1414 else if (strlencmp(cmd, "disable") == 0) 1415 status = TPACPI_RFK_RADIO_OFF; 1416 else 1417 return -EINVAL; 1418 } 1419 1420 if (status != -1) { 1421 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1422 (status == TPACPI_RFK_RADIO_ON) ? 1423 "enable" : "disable", 1424 tpacpi_rfkill_names[id]); 1425 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1426 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1427 } 1428 1429 return res; 1430 } 1431 1432 /************************************************************************* 1433 * thinkpad-acpi driver attributes 1434 */ 1435 1436 /* interface_version --------------------------------------------------- */ 1437 static ssize_t tpacpi_driver_interface_version_show( 1438 struct device_driver *drv, 1439 char *buf) 1440 { 1441 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1442 } 1443 1444 static DRIVER_ATTR(interface_version, S_IRUGO, 1445 tpacpi_driver_interface_version_show, NULL); 1446 1447 /* debug_level --------------------------------------------------------- */ 1448 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1449 char *buf) 1450 { 1451 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1452 } 1453 1454 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1455 const char *buf, size_t count) 1456 { 1457 unsigned long t; 1458 1459 if (parse_strtoul(buf, 0xffff, &t)) 1460 return -EINVAL; 1461 1462 dbg_level = t; 1463 1464 return count; 1465 } 1466 1467 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1468 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1469 1470 /* version ------------------------------------------------------------- */ 1471 static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1472 char *buf) 1473 { 1474 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1475 TPACPI_DESC, TPACPI_VERSION); 1476 } 1477 1478 static DRIVER_ATTR(version, S_IRUGO, 1479 tpacpi_driver_version_show, NULL); 1480 1481 /* --------------------------------------------------------------------- */ 1482 1483 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1484 1485 /* wlsw_emulstate ------------------------------------------------------ */ 1486 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1487 char *buf) 1488 { 1489 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1490 } 1491 1492 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1493 const char *buf, size_t count) 1494 { 1495 unsigned long t; 1496 1497 if (parse_strtoul(buf, 1, &t)) 1498 return -EINVAL; 1499 1500 if (tpacpi_wlsw_emulstate != !!t) { 1501 tpacpi_wlsw_emulstate = !!t; 1502 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1503 } 1504 1505 return count; 1506 } 1507 1508 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1509 tpacpi_driver_wlsw_emulstate_show, 1510 tpacpi_driver_wlsw_emulstate_store); 1511 1512 /* bluetooth_emulstate ------------------------------------------------- */ 1513 static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1514 struct device_driver *drv, 1515 char *buf) 1516 { 1517 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1518 } 1519 1520 static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1521 struct device_driver *drv, 1522 const char *buf, size_t count) 1523 { 1524 unsigned long t; 1525 1526 if (parse_strtoul(buf, 1, &t)) 1527 return -EINVAL; 1528 1529 tpacpi_bluetooth_emulstate = !!t; 1530 1531 return count; 1532 } 1533 1534 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1535 tpacpi_driver_bluetooth_emulstate_show, 1536 tpacpi_driver_bluetooth_emulstate_store); 1537 1538 /* wwan_emulstate ------------------------------------------------- */ 1539 static ssize_t tpacpi_driver_wwan_emulstate_show( 1540 struct device_driver *drv, 1541 char *buf) 1542 { 1543 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1544 } 1545 1546 static ssize_t tpacpi_driver_wwan_emulstate_store( 1547 struct device_driver *drv, 1548 const char *buf, size_t count) 1549 { 1550 unsigned long t; 1551 1552 if (parse_strtoul(buf, 1, &t)) 1553 return -EINVAL; 1554 1555 tpacpi_wwan_emulstate = !!t; 1556 1557 return count; 1558 } 1559 1560 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1561 tpacpi_driver_wwan_emulstate_show, 1562 tpacpi_driver_wwan_emulstate_store); 1563 1564 /* uwb_emulstate ------------------------------------------------- */ 1565 static ssize_t tpacpi_driver_uwb_emulstate_show( 1566 struct device_driver *drv, 1567 char *buf) 1568 { 1569 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1570 } 1571 1572 static ssize_t tpacpi_driver_uwb_emulstate_store( 1573 struct device_driver *drv, 1574 const char *buf, size_t count) 1575 { 1576 unsigned long t; 1577 1578 if (parse_strtoul(buf, 1, &t)) 1579 return -EINVAL; 1580 1581 tpacpi_uwb_emulstate = !!t; 1582 1583 return count; 1584 } 1585 1586 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1587 tpacpi_driver_uwb_emulstate_show, 1588 tpacpi_driver_uwb_emulstate_store); 1589 #endif 1590 1591 /* --------------------------------------------------------------------- */ 1592 1593 static struct driver_attribute *tpacpi_driver_attributes[] = { 1594 &driver_attr_debug_level, &driver_attr_version, 1595 &driver_attr_interface_version, 1596 }; 1597 1598 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1599 { 1600 int i, res; 1601 1602 i = 0; 1603 res = 0; 1604 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1605 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1606 i++; 1607 } 1608 1609 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1610 if (!res && dbg_wlswemul) 1611 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1612 if (!res && dbg_bluetoothemul) 1613 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1614 if (!res && dbg_wwanemul) 1615 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1616 if (!res && dbg_uwbemul) 1617 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1618 #endif 1619 1620 return res; 1621 } 1622 1623 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1624 { 1625 int i; 1626 1627 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1628 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1629 1630 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1631 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1632 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1633 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1634 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1635 #endif 1636 } 1637 1638 /************************************************************************* 1639 * Firmware Data 1640 */ 1641 1642 /* 1643 * Table of recommended minimum BIOS versions 1644 * 1645 * Reasons for listing: 1646 * 1. Stable BIOS, listed because the unknown amount of 1647 * bugs and bad ACPI behaviour on older versions 1648 * 1649 * 2. BIOS or EC fw with known bugs that trigger on Linux 1650 * 1651 * 3. BIOS with known reduced functionality in older versions 1652 * 1653 * We recommend the latest BIOS and EC version. 1654 * We only support the latest BIOS and EC fw version as a rule. 1655 * 1656 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1657 * Information from users in ThinkWiki 1658 * 1659 * WARNING: we use this table also to detect that the machine is 1660 * a ThinkPad in some cases, so don't remove entries lightly. 1661 */ 1662 1663 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1664 { .vendor = (__v), \ 1665 .bios = TPID(__id1, __id2), \ 1666 .ec = TPACPI_MATCH_ANY, \ 1667 .quirks = TPACPI_MATCH_ANY << 16 \ 1668 | (__bv1) << 8 | (__bv2) } 1669 1670 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1671 __eid, __ev1, __ev2) \ 1672 { .vendor = (__v), \ 1673 .bios = TPID(__bid1, __bid2), \ 1674 .ec = __eid, \ 1675 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1676 | (__bv1) << 8 | (__bv2) } 1677 1678 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1679 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1680 1681 /* Outdated IBM BIOSes often lack the EC id string */ 1682 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1683 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1684 __bv1, __bv2, TPID(__id1, __id2), \ 1685 __ev1, __ev2), \ 1686 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1687 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1688 __ev1, __ev2) 1689 1690 /* Outdated IBM BIOSes often lack the EC id string */ 1691 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1692 __eid1, __eid2, __ev1, __ev2) \ 1693 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1694 __bv1, __bv2, TPID(__eid1, __eid2), \ 1695 __ev1, __ev2), \ 1696 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1697 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1698 __ev1, __ev2) 1699 1700 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1701 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1702 1703 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1704 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1705 __bv1, __bv2, TPID(__id1, __id2), \ 1706 __ev1, __ev2) 1707 1708 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1709 __eid1, __eid2, __ev1, __ev2) \ 1710 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1711 __bv1, __bv2, TPID(__eid1, __eid2), \ 1712 __ev1, __ev2) 1713 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_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1771 1772 /* BIOS FW BIOS VERS EC FW EC VERS */ 1773 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1774 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1775 1776 /* X-series ------------------------- */ 1777 /* FW MODEL BIOS VERS EC VERS */ 1778 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1779 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1780 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1781 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1782 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1783 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1784 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1785 1786 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1787 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1788 1789 /* (0) - older versions lack DMI EC fw string and functionality */ 1790 /* (1) - older versions known to lack functionality */ 1791 }; 1792 1793 #undef TPV_QL1 1794 #undef TPV_QL0 1795 #undef TPV_QI2 1796 #undef TPV_QI1 1797 #undef TPV_QI0 1798 #undef TPV_Q_X 1799 #undef TPV_Q 1800 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 metadata subdriver 1850 */ 1851 1852 static int thinkpad_acpi_driver_read(struct seq_file *m) 1853 { 1854 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1855 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1856 return 0; 1857 } 1858 1859 static struct ibm_struct thinkpad_acpi_driver_data = { 1860 .name = "driver", 1861 .read = thinkpad_acpi_driver_read, 1862 }; 1863 1864 /************************************************************************* 1865 * Hotkey subdriver 1866 */ 1867 1868 /* 1869 * ThinkPad firmware event model 1870 * 1871 * The ThinkPad firmware has two main event interfaces: normal ACPI 1872 * notifications (which follow the ACPI standard), and a private event 1873 * interface. 1874 * 1875 * The private event interface also issues events for the hotkeys. As 1876 * the driver gained features, the event handling code ended up being 1877 * built around the hotkey subdriver. This will need to be refactored 1878 * to a more formal event API eventually. 1879 * 1880 * Some "hotkeys" are actually supposed to be used as event reports, 1881 * such as "brightness has changed", "volume has changed", depending on 1882 * the ThinkPad model and how the firmware is operating. 1883 * 1884 * Unlike other classes, hotkey-class events have mask/unmask control on 1885 * non-ancient firmware. However, how it behaves changes a lot with the 1886 * firmware model and version. 1887 */ 1888 1889 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1890 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1891 TP_ACPI_HOTKEYSCAN_FNF2, 1892 TP_ACPI_HOTKEYSCAN_FNF3, 1893 TP_ACPI_HOTKEYSCAN_FNF4, 1894 TP_ACPI_HOTKEYSCAN_FNF5, 1895 TP_ACPI_HOTKEYSCAN_FNF6, 1896 TP_ACPI_HOTKEYSCAN_FNF7, 1897 TP_ACPI_HOTKEYSCAN_FNF8, 1898 TP_ACPI_HOTKEYSCAN_FNF9, 1899 TP_ACPI_HOTKEYSCAN_FNF10, 1900 TP_ACPI_HOTKEYSCAN_FNF11, 1901 TP_ACPI_HOTKEYSCAN_FNF12, 1902 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1903 TP_ACPI_HOTKEYSCAN_FNINSERT, 1904 TP_ACPI_HOTKEYSCAN_FNDELETE, 1905 TP_ACPI_HOTKEYSCAN_FNHOME, 1906 TP_ACPI_HOTKEYSCAN_FNEND, 1907 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1908 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1909 TP_ACPI_HOTKEYSCAN_FNSPACE, 1910 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1911 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1912 TP_ACPI_HOTKEYSCAN_MUTE, 1913 TP_ACPI_HOTKEYSCAN_THINKPAD, 1914 TP_ACPI_HOTKEYSCAN_UNK1, 1915 TP_ACPI_HOTKEYSCAN_UNK2, 1916 TP_ACPI_HOTKEYSCAN_UNK3, 1917 TP_ACPI_HOTKEYSCAN_UNK4, 1918 TP_ACPI_HOTKEYSCAN_UNK5, 1919 TP_ACPI_HOTKEYSCAN_UNK6, 1920 TP_ACPI_HOTKEYSCAN_UNK7, 1921 TP_ACPI_HOTKEYSCAN_UNK8, 1922 1923 /* Hotkey keymap size */ 1924 TPACPI_HOTKEY_MAP_LEN 1925 }; 1926 1927 enum { /* Keys/events available through NVRAM polling */ 1928 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1929 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1930 }; 1931 1932 enum { /* Positions of some of the keys in hotkey masks */ 1933 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1934 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1935 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1936 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1937 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1938 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1939 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1940 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1941 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1942 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1943 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1944 }; 1945 1946 enum { /* NVRAM to ACPI HKEY group map */ 1947 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1948 TP_ACPI_HKEY_ZOOM_MASK | 1949 TP_ACPI_HKEY_DISPSWTCH_MASK | 1950 TP_ACPI_HKEY_HIBERNATE_MASK, 1951 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1952 TP_ACPI_HKEY_BRGHTDWN_MASK, 1953 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1954 TP_ACPI_HKEY_VOLDWN_MASK | 1955 TP_ACPI_HKEY_MUTE_MASK, 1956 }; 1957 1958 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1959 struct tp_nvram_state { 1960 u16 thinkpad_toggle:1; 1961 u16 zoom_toggle:1; 1962 u16 display_toggle:1; 1963 u16 thinklight_toggle:1; 1964 u16 hibernate_toggle:1; 1965 u16 displayexp_toggle:1; 1966 u16 display_state:1; 1967 u16 brightness_toggle:1; 1968 u16 volume_toggle:1; 1969 u16 mute:1; 1970 1971 u8 brightness_level; 1972 u8 volume_level; 1973 }; 1974 1975 /* kthread for the hotkey poller */ 1976 static struct task_struct *tpacpi_hotkey_task; 1977 1978 /* Acquired while the poller kthread is running, use to sync start/stop */ 1979 static struct mutex hotkey_thread_mutex; 1980 1981 /* 1982 * Acquire mutex to write poller control variables as an 1983 * atomic block. 1984 * 1985 * Increment hotkey_config_change when changing them if you 1986 * want the kthread to forget old state. 1987 * 1988 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1989 */ 1990 static struct mutex hotkey_thread_data_mutex; 1991 static unsigned int hotkey_config_change; 1992 1993 /* 1994 * hotkey poller control variables 1995 * 1996 * Must be atomic or readers will also need to acquire mutex 1997 * 1998 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1999 * should be used only when the changes need to be taken as 2000 * a block, OR when one needs to force the kthread to forget 2001 * old state. 2002 */ 2003 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2004 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2005 2006 #define HOTKEY_CONFIG_CRITICAL_START \ 2007 do { \ 2008 mutex_lock(&hotkey_thread_data_mutex); \ 2009 hotkey_config_change++; \ 2010 } while (0); 2011 #define HOTKEY_CONFIG_CRITICAL_END \ 2012 mutex_unlock(&hotkey_thread_data_mutex); 2013 2014 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2015 2016 #define hotkey_source_mask 0U 2017 #define HOTKEY_CONFIG_CRITICAL_START 2018 #define HOTKEY_CONFIG_CRITICAL_END 2019 2020 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2021 2022 static struct mutex hotkey_mutex; 2023 2024 static enum { /* Reasons for waking up */ 2025 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2026 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2027 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2028 } hotkey_wakeup_reason; 2029 2030 static int hotkey_autosleep_ack; 2031 2032 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2033 static u32 hotkey_all_mask; /* all events supported in fw */ 2034 static u32 hotkey_reserved_mask; /* events better left disabled */ 2035 static u32 hotkey_driver_mask; /* events needed by the driver */ 2036 static u32 hotkey_user_mask; /* events visible to userspace */ 2037 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2038 2039 static unsigned int hotkey_report_mode; 2040 2041 static u16 *hotkey_keycode_map; 2042 2043 static struct attribute_set *hotkey_dev_attributes; 2044 2045 static void tpacpi_driver_event(const unsigned int hkey_event); 2046 static void hotkey_driver_event(const unsigned int scancode); 2047 static void hotkey_poll_setup(const bool may_warn); 2048 2049 /* HKEY.MHKG() return bits */ 2050 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2051 2052 static int hotkey_get_wlsw(void) 2053 { 2054 int status; 2055 2056 if (!tp_features.hotkey_wlsw) 2057 return -ENODEV; 2058 2059 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2060 if (dbg_wlswemul) 2061 return (tpacpi_wlsw_emulstate) ? 2062 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2063 #endif 2064 2065 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2066 return -EIO; 2067 2068 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2069 } 2070 2071 static int hotkey_get_tablet_mode(int *status) 2072 { 2073 int s; 2074 2075 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2076 return -EIO; 2077 2078 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2079 return 0; 2080 } 2081 2082 /* 2083 * Reads current event mask from firmware, and updates 2084 * hotkey_acpi_mask accordingly. Also resets any bits 2085 * from hotkey_user_mask that are unavailable to be 2086 * delivered (shadow requirement of the userspace ABI). 2087 * 2088 * Call with hotkey_mutex held 2089 */ 2090 static int hotkey_mask_get(void) 2091 { 2092 if (tp_features.hotkey_mask) { 2093 u32 m = 0; 2094 2095 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2096 return -EIO; 2097 2098 hotkey_acpi_mask = m; 2099 } else { 2100 /* no mask support doesn't mean no event support... */ 2101 hotkey_acpi_mask = hotkey_all_mask; 2102 } 2103 2104 /* sync userspace-visible mask */ 2105 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2106 2107 return 0; 2108 } 2109 2110 void static hotkey_mask_warn_incomplete_mask(void) 2111 { 2112 /* log only what the user can fix... */ 2113 const u32 wantedmask = hotkey_driver_mask & 2114 ~(hotkey_acpi_mask | hotkey_source_mask) & 2115 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2116 2117 if (wantedmask) 2118 printk(TPACPI_NOTICE 2119 "required events 0x%08x not enabled!\n", 2120 wantedmask); 2121 } 2122 2123 /* 2124 * Set the firmware mask when supported 2125 * 2126 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2127 * 2128 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2129 * 2130 * Call with hotkey_mutex held 2131 */ 2132 static int hotkey_mask_set(u32 mask) 2133 { 2134 int i; 2135 int rc = 0; 2136 2137 const u32 fwmask = mask & ~hotkey_source_mask; 2138 2139 if (tp_features.hotkey_mask) { 2140 for (i = 0; i < 32; i++) { 2141 if (!acpi_evalf(hkey_handle, 2142 NULL, "MHKM", "vdd", i + 1, 2143 !!(mask & (1 << i)))) { 2144 rc = -EIO; 2145 break; 2146 } 2147 } 2148 } 2149 2150 /* 2151 * We *must* make an inconditional call to hotkey_mask_get to 2152 * refresh hotkey_acpi_mask and update hotkey_user_mask 2153 * 2154 * Take the opportunity to also log when we cannot _enable_ 2155 * a given event. 2156 */ 2157 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2158 printk(TPACPI_NOTICE 2159 "asked for hotkey mask 0x%08x, but " 2160 "firmware forced it to 0x%08x\n", 2161 fwmask, hotkey_acpi_mask); 2162 } 2163 2164 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2165 hotkey_mask_warn_incomplete_mask(); 2166 2167 return rc; 2168 } 2169 2170 /* 2171 * Sets hotkey_user_mask and tries to set the firmware mask 2172 * 2173 * Call with hotkey_mutex held 2174 */ 2175 static int hotkey_user_mask_set(const u32 mask) 2176 { 2177 int rc; 2178 2179 /* Give people a chance to notice they are doing something that 2180 * is bound to go boom on their users sooner or later */ 2181 if (!tp_warned.hotkey_mask_ff && 2182 (mask == 0xffff || mask == 0xffffff || 2183 mask == 0xffffffff)) { 2184 tp_warned.hotkey_mask_ff = 1; 2185 printk(TPACPI_NOTICE 2186 "setting the hotkey mask to 0x%08x is likely " 2187 "not the best way to go about it\n", mask); 2188 printk(TPACPI_NOTICE 2189 "please consider using the driver defaults, " 2190 "and refer to up-to-date thinkpad-acpi " 2191 "documentation\n"); 2192 } 2193 2194 /* Try to enable what the user asked for, plus whatever we need. 2195 * this syncs everything but won't enable bits in hotkey_user_mask */ 2196 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2197 2198 /* Enable the available bits in hotkey_user_mask */ 2199 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2200 2201 return rc; 2202 } 2203 2204 /* 2205 * Sets the driver hotkey mask. 2206 * 2207 * Can be called even if the hotkey subdriver is inactive 2208 */ 2209 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2210 { 2211 int rc; 2212 2213 /* Do the right thing if hotkey_init has not been called yet */ 2214 if (!tp_features.hotkey) { 2215 hotkey_driver_mask = mask; 2216 return 0; 2217 } 2218 2219 mutex_lock(&hotkey_mutex); 2220 2221 HOTKEY_CONFIG_CRITICAL_START 2222 hotkey_driver_mask = mask; 2223 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2224 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2225 #endif 2226 HOTKEY_CONFIG_CRITICAL_END 2227 2228 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2229 ~hotkey_source_mask); 2230 hotkey_poll_setup(true); 2231 2232 mutex_unlock(&hotkey_mutex); 2233 2234 return rc; 2235 } 2236 2237 static int hotkey_status_get(int *status) 2238 { 2239 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2240 return -EIO; 2241 2242 return 0; 2243 } 2244 2245 static int hotkey_status_set(bool enable) 2246 { 2247 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2248 return -EIO; 2249 2250 return 0; 2251 } 2252 2253 static void tpacpi_input_send_tabletsw(void) 2254 { 2255 int state; 2256 2257 if (tp_features.hotkey_tablet && 2258 !hotkey_get_tablet_mode(&state)) { 2259 mutex_lock(&tpacpi_inputdev_send_mutex); 2260 2261 input_report_switch(tpacpi_inputdev, 2262 SW_TABLET_MODE, !!state); 2263 input_sync(tpacpi_inputdev); 2264 2265 mutex_unlock(&tpacpi_inputdev_send_mutex); 2266 } 2267 } 2268 2269 /* Do NOT call without validating scancode first */ 2270 static void tpacpi_input_send_key(const unsigned int scancode) 2271 { 2272 const unsigned int keycode = hotkey_keycode_map[scancode]; 2273 2274 if (keycode != KEY_RESERVED) { 2275 mutex_lock(&tpacpi_inputdev_send_mutex); 2276 2277 input_report_key(tpacpi_inputdev, keycode, 1); 2278 if (keycode == KEY_UNKNOWN) 2279 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, 2280 scancode); 2281 input_sync(tpacpi_inputdev); 2282 2283 input_report_key(tpacpi_inputdev, keycode, 0); 2284 if (keycode == KEY_UNKNOWN) 2285 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, 2286 scancode); 2287 input_sync(tpacpi_inputdev); 2288 2289 mutex_unlock(&tpacpi_inputdev_send_mutex); 2290 } 2291 } 2292 2293 /* Do NOT call without validating scancode first */ 2294 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2295 { 2296 hotkey_driver_event(scancode); 2297 if (hotkey_user_mask & (1 << scancode)) 2298 tpacpi_input_send_key(scancode); 2299 } 2300 2301 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2302 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2303 2304 /* Do NOT call without validating scancode first */ 2305 static void tpacpi_hotkey_send_key(unsigned int scancode) 2306 { 2307 tpacpi_input_send_key_masked(scancode); 2308 if (hotkey_report_mode < 2) { 2309 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device, 2310 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode); 2311 } 2312 } 2313 2314 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2315 { 2316 u8 d; 2317 2318 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2319 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2320 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2321 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2322 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2323 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2324 } 2325 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2326 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2327 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2328 } 2329 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2330 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2331 n->displayexp_toggle = 2332 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2333 } 2334 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2335 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2336 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2337 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2338 n->brightness_toggle = 2339 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2340 } 2341 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2342 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2343 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2344 >> TP_NVRAM_POS_LEVEL_VOLUME; 2345 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2346 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2347 } 2348 } 2349 2350 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2351 struct tp_nvram_state *newn, 2352 const u32 event_mask) 2353 { 2354 2355 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2356 do { \ 2357 if ((event_mask & (1 << __scancode)) && \ 2358 oldn->__member != newn->__member) \ 2359 tpacpi_hotkey_send_key(__scancode); \ 2360 } while (0) 2361 2362 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2363 do { \ 2364 if (event_mask & (1 << __scancode)) \ 2365 tpacpi_hotkey_send_key(__scancode); \ 2366 } while (0) 2367 2368 void issue_volchange(const unsigned int oldvol, 2369 const unsigned int newvol) 2370 { 2371 unsigned int i = oldvol; 2372 2373 while (i > newvol) { 2374 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2375 i--; 2376 } 2377 while (i < newvol) { 2378 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2379 i++; 2380 } 2381 } 2382 2383 void issue_brightnesschange(const unsigned int oldbrt, 2384 const unsigned int newbrt) 2385 { 2386 unsigned int i = oldbrt; 2387 2388 while (i > newbrt) { 2389 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2390 i--; 2391 } 2392 while (i < newbrt) { 2393 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2394 i++; 2395 } 2396 } 2397 2398 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2399 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2400 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2401 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2402 2403 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2404 2405 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2406 2407 /* 2408 * Handle volume 2409 * 2410 * This code is supposed to duplicate the IBM firmware behaviour: 2411 * - Pressing MUTE issues mute hotkey message, even when already mute 2412 * - Pressing Volume up/down issues volume up/down hotkey messages, 2413 * even when already at maximum or minumum volume 2414 * - The act of unmuting issues volume up/down notification, 2415 * depending which key was used to unmute 2416 * 2417 * We are constrained to what the NVRAM can tell us, which is not much 2418 * and certainly not enough if more than one volume hotkey was pressed 2419 * since the last poll cycle. 2420 * 2421 * Just to make our life interesting, some newer Lenovo ThinkPads have 2422 * bugs in the BIOS and may fail to update volume_toggle properly. 2423 */ 2424 if (newn->mute) { 2425 /* muted */ 2426 if (!oldn->mute || 2427 oldn->volume_toggle != newn->volume_toggle || 2428 oldn->volume_level != newn->volume_level) { 2429 /* recently muted, or repeated mute keypress, or 2430 * multiple presses ending in mute */ 2431 issue_volchange(oldn->volume_level, newn->volume_level); 2432 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2433 } 2434 } else { 2435 /* unmute */ 2436 if (oldn->mute) { 2437 /* recently unmuted, issue 'unmute' keypress */ 2438 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2439 } 2440 if (oldn->volume_level != newn->volume_level) { 2441 issue_volchange(oldn->volume_level, newn->volume_level); 2442 } else if (oldn->volume_toggle != newn->volume_toggle) { 2443 /* repeated vol up/down keypress at end of scale ? */ 2444 if (newn->volume_level == 0) 2445 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2446 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2447 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2448 } 2449 } 2450 2451 /* handle brightness */ 2452 if (oldn->brightness_level != newn->brightness_level) { 2453 issue_brightnesschange(oldn->brightness_level, 2454 newn->brightness_level); 2455 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2456 /* repeated key presses that didn't change state */ 2457 if (newn->brightness_level == 0) 2458 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2459 else if (newn->brightness_level >= bright_maxlvl 2460 && !tp_features.bright_unkfw) 2461 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2462 } 2463 2464 #undef TPACPI_COMPARE_KEY 2465 #undef TPACPI_MAY_SEND_KEY 2466 } 2467 2468 /* 2469 * Polling driver 2470 * 2471 * We track all events in hotkey_source_mask all the time, since 2472 * most of them are edge-based. We only issue those requested by 2473 * hotkey_user_mask or hotkey_driver_mask, though. 2474 */ 2475 static int hotkey_kthread(void *data) 2476 { 2477 struct tp_nvram_state s[2]; 2478 u32 poll_mask, event_mask; 2479 unsigned int si, so; 2480 unsigned long t; 2481 unsigned int change_detector, must_reset; 2482 unsigned int poll_freq; 2483 2484 mutex_lock(&hotkey_thread_mutex); 2485 2486 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2487 goto exit; 2488 2489 set_freezable(); 2490 2491 so = 0; 2492 si = 1; 2493 t = 0; 2494 2495 /* Initial state for compares */ 2496 mutex_lock(&hotkey_thread_data_mutex); 2497 change_detector = hotkey_config_change; 2498 poll_mask = hotkey_source_mask; 2499 event_mask = hotkey_source_mask & 2500 (hotkey_driver_mask | hotkey_user_mask); 2501 poll_freq = hotkey_poll_freq; 2502 mutex_unlock(&hotkey_thread_data_mutex); 2503 hotkey_read_nvram(&s[so], poll_mask); 2504 2505 while (!kthread_should_stop()) { 2506 if (t == 0) { 2507 if (likely(poll_freq)) 2508 t = 1000/poll_freq; 2509 else 2510 t = 100; /* should never happen... */ 2511 } 2512 t = msleep_interruptible(t); 2513 if (unlikely(kthread_should_stop())) 2514 break; 2515 must_reset = try_to_freeze(); 2516 if (t > 0 && !must_reset) 2517 continue; 2518 2519 mutex_lock(&hotkey_thread_data_mutex); 2520 if (must_reset || hotkey_config_change != change_detector) { 2521 /* forget old state on thaw or config change */ 2522 si = so; 2523 t = 0; 2524 change_detector = hotkey_config_change; 2525 } 2526 poll_mask = hotkey_source_mask; 2527 event_mask = hotkey_source_mask & 2528 (hotkey_driver_mask | hotkey_user_mask); 2529 poll_freq = hotkey_poll_freq; 2530 mutex_unlock(&hotkey_thread_data_mutex); 2531 2532 if (likely(poll_mask)) { 2533 hotkey_read_nvram(&s[si], poll_mask); 2534 if (likely(si != so)) { 2535 hotkey_compare_and_issue_event(&s[so], &s[si], 2536 event_mask); 2537 } 2538 } 2539 2540 so = si; 2541 si ^= 1; 2542 } 2543 2544 exit: 2545 mutex_unlock(&hotkey_thread_mutex); 2546 return 0; 2547 } 2548 2549 /* call with hotkey_mutex held */ 2550 static void hotkey_poll_stop_sync(void) 2551 { 2552 if (tpacpi_hotkey_task) { 2553 if (frozen(tpacpi_hotkey_task) || 2554 freezing(tpacpi_hotkey_task)) 2555 thaw_process(tpacpi_hotkey_task); 2556 2557 kthread_stop(tpacpi_hotkey_task); 2558 tpacpi_hotkey_task = NULL; 2559 mutex_lock(&hotkey_thread_mutex); 2560 /* at this point, the thread did exit */ 2561 mutex_unlock(&hotkey_thread_mutex); 2562 } 2563 } 2564 2565 /* call with hotkey_mutex held */ 2566 static void hotkey_poll_setup(const bool may_warn) 2567 { 2568 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2569 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2570 2571 if (hotkey_poll_freq > 0 && 2572 (poll_driver_mask || 2573 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2574 if (!tpacpi_hotkey_task) { 2575 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2576 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2577 if (IS_ERR(tpacpi_hotkey_task)) { 2578 tpacpi_hotkey_task = NULL; 2579 printk(TPACPI_ERR 2580 "could not create kernel thread " 2581 "for hotkey polling\n"); 2582 } 2583 } 2584 } else { 2585 hotkey_poll_stop_sync(); 2586 if (may_warn && (poll_driver_mask || poll_user_mask) && 2587 hotkey_poll_freq == 0) { 2588 printk(TPACPI_NOTICE 2589 "hot keys 0x%08x and/or events 0x%08x " 2590 "require polling, which is currently " 2591 "disabled\n", 2592 poll_user_mask, poll_driver_mask); 2593 } 2594 } 2595 } 2596 2597 static void hotkey_poll_setup_safe(const bool may_warn) 2598 { 2599 mutex_lock(&hotkey_mutex); 2600 hotkey_poll_setup(may_warn); 2601 mutex_unlock(&hotkey_mutex); 2602 } 2603 2604 /* call with hotkey_mutex held */ 2605 static void hotkey_poll_set_freq(unsigned int freq) 2606 { 2607 if (!freq) 2608 hotkey_poll_stop_sync(); 2609 2610 hotkey_poll_freq = freq; 2611 } 2612 2613 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2614 2615 static void hotkey_poll_setup(const bool __unused) 2616 { 2617 } 2618 2619 static void hotkey_poll_setup_safe(const bool __unused) 2620 { 2621 } 2622 2623 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2624 2625 static int hotkey_inputdev_open(struct input_dev *dev) 2626 { 2627 switch (tpacpi_lifecycle) { 2628 case TPACPI_LIFE_INIT: 2629 case TPACPI_LIFE_RUNNING: 2630 hotkey_poll_setup_safe(false); 2631 return 0; 2632 case TPACPI_LIFE_EXITING: 2633 return -EBUSY; 2634 } 2635 2636 /* Should only happen if tpacpi_lifecycle is corrupt */ 2637 BUG(); 2638 return -EBUSY; 2639 } 2640 2641 static void hotkey_inputdev_close(struct input_dev *dev) 2642 { 2643 /* disable hotkey polling when possible */ 2644 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2645 !(hotkey_source_mask & hotkey_driver_mask)) 2646 hotkey_poll_setup_safe(false); 2647 } 2648 2649 /* sysfs hotkey enable ------------------------------------------------- */ 2650 static ssize_t hotkey_enable_show(struct device *dev, 2651 struct device_attribute *attr, 2652 char *buf) 2653 { 2654 int res, status; 2655 2656 printk_deprecated_attribute("hotkey_enable", 2657 "Hotkey reporting is always enabled"); 2658 2659 res = hotkey_status_get(&status); 2660 if (res) 2661 return res; 2662 2663 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2664 } 2665 2666 static ssize_t hotkey_enable_store(struct device *dev, 2667 struct device_attribute *attr, 2668 const char *buf, size_t count) 2669 { 2670 unsigned long t; 2671 2672 printk_deprecated_attribute("hotkey_enable", 2673 "Hotkeys can be disabled through hotkey_mask"); 2674 2675 if (parse_strtoul(buf, 1, &t)) 2676 return -EINVAL; 2677 2678 if (t == 0) 2679 return -EPERM; 2680 2681 return count; 2682 } 2683 2684 static struct device_attribute dev_attr_hotkey_enable = 2685 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO, 2686 hotkey_enable_show, hotkey_enable_store); 2687 2688 /* sysfs hotkey mask --------------------------------------------------- */ 2689 static ssize_t hotkey_mask_show(struct device *dev, 2690 struct device_attribute *attr, 2691 char *buf) 2692 { 2693 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2694 } 2695 2696 static ssize_t hotkey_mask_store(struct device *dev, 2697 struct device_attribute *attr, 2698 const char *buf, size_t count) 2699 { 2700 unsigned long t; 2701 int res; 2702 2703 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2704 return -EINVAL; 2705 2706 if (mutex_lock_killable(&hotkey_mutex)) 2707 return -ERESTARTSYS; 2708 2709 res = hotkey_user_mask_set(t); 2710 2711 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2712 hotkey_poll_setup(true); 2713 #endif 2714 2715 mutex_unlock(&hotkey_mutex); 2716 2717 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2718 2719 return (res) ? res : count; 2720 } 2721 2722 static struct device_attribute dev_attr_hotkey_mask = 2723 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO, 2724 hotkey_mask_show, hotkey_mask_store); 2725 2726 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2727 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2728 struct device_attribute *attr, 2729 char *buf) 2730 { 2731 return sprintf(buf, "0\n"); 2732 } 2733 2734 static struct device_attribute dev_attr_hotkey_bios_enabled = 2735 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL); 2736 2737 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2738 static ssize_t hotkey_bios_mask_show(struct device *dev, 2739 struct device_attribute *attr, 2740 char *buf) 2741 { 2742 printk_deprecated_attribute("hotkey_bios_mask", 2743 "This attribute is useless."); 2744 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2745 } 2746 2747 static struct device_attribute dev_attr_hotkey_bios_mask = 2748 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL); 2749 2750 /* sysfs hotkey all_mask ----------------------------------------------- */ 2751 static ssize_t hotkey_all_mask_show(struct device *dev, 2752 struct device_attribute *attr, 2753 char *buf) 2754 { 2755 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2756 hotkey_all_mask | hotkey_source_mask); 2757 } 2758 2759 static struct device_attribute dev_attr_hotkey_all_mask = 2760 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL); 2761 2762 /* sysfs hotkey recommended_mask --------------------------------------- */ 2763 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2764 struct device_attribute *attr, 2765 char *buf) 2766 { 2767 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2768 (hotkey_all_mask | hotkey_source_mask) 2769 & ~hotkey_reserved_mask); 2770 } 2771 2772 static struct device_attribute dev_attr_hotkey_recommended_mask = 2773 __ATTR(hotkey_recommended_mask, S_IRUGO, 2774 hotkey_recommended_mask_show, NULL); 2775 2776 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2777 2778 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2779 static ssize_t hotkey_source_mask_show(struct device *dev, 2780 struct device_attribute *attr, 2781 char *buf) 2782 { 2783 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2784 } 2785 2786 static ssize_t hotkey_source_mask_store(struct device *dev, 2787 struct device_attribute *attr, 2788 const char *buf, size_t count) 2789 { 2790 unsigned long t; 2791 u32 r_ev; 2792 int rc; 2793 2794 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2795 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2796 return -EINVAL; 2797 2798 if (mutex_lock_killable(&hotkey_mutex)) 2799 return -ERESTARTSYS; 2800 2801 HOTKEY_CONFIG_CRITICAL_START 2802 hotkey_source_mask = t; 2803 HOTKEY_CONFIG_CRITICAL_END 2804 2805 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2806 ~hotkey_source_mask); 2807 hotkey_poll_setup(true); 2808 2809 /* check if events needed by the driver got disabled */ 2810 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2811 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2812 2813 mutex_unlock(&hotkey_mutex); 2814 2815 if (rc < 0) 2816 printk(TPACPI_ERR "hotkey_source_mask: failed to update the" 2817 "firmware event mask!\n"); 2818 2819 if (r_ev) 2820 printk(TPACPI_NOTICE "hotkey_source_mask: " 2821 "some important events were disabled: " 2822 "0x%04x\n", r_ev); 2823 2824 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2825 2826 return (rc < 0) ? rc : count; 2827 } 2828 2829 static struct device_attribute dev_attr_hotkey_source_mask = 2830 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO, 2831 hotkey_source_mask_show, hotkey_source_mask_store); 2832 2833 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2834 static ssize_t hotkey_poll_freq_show(struct device *dev, 2835 struct device_attribute *attr, 2836 char *buf) 2837 { 2838 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2839 } 2840 2841 static ssize_t hotkey_poll_freq_store(struct device *dev, 2842 struct device_attribute *attr, 2843 const char *buf, size_t count) 2844 { 2845 unsigned long t; 2846 2847 if (parse_strtoul(buf, 25, &t)) 2848 return -EINVAL; 2849 2850 if (mutex_lock_killable(&hotkey_mutex)) 2851 return -ERESTARTSYS; 2852 2853 hotkey_poll_set_freq(t); 2854 hotkey_poll_setup(true); 2855 2856 mutex_unlock(&hotkey_mutex); 2857 2858 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2859 2860 return count; 2861 } 2862 2863 static struct device_attribute dev_attr_hotkey_poll_freq = 2864 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO, 2865 hotkey_poll_freq_show, hotkey_poll_freq_store); 2866 2867 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2868 2869 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2870 static ssize_t hotkey_radio_sw_show(struct device *dev, 2871 struct device_attribute *attr, 2872 char *buf) 2873 { 2874 int res; 2875 res = hotkey_get_wlsw(); 2876 if (res < 0) 2877 return res; 2878 2879 /* Opportunistic update */ 2880 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2881 2882 return snprintf(buf, PAGE_SIZE, "%d\n", 2883 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2884 } 2885 2886 static struct device_attribute dev_attr_hotkey_radio_sw = 2887 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL); 2888 2889 static void hotkey_radio_sw_notify_change(void) 2890 { 2891 if (tp_features.hotkey_wlsw) 2892 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2893 "hotkey_radio_sw"); 2894 } 2895 2896 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2897 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2898 struct device_attribute *attr, 2899 char *buf) 2900 { 2901 int res, s; 2902 res = hotkey_get_tablet_mode(&s); 2903 if (res < 0) 2904 return res; 2905 2906 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2907 } 2908 2909 static struct device_attribute dev_attr_hotkey_tablet_mode = 2910 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL); 2911 2912 static void hotkey_tablet_mode_notify_change(void) 2913 { 2914 if (tp_features.hotkey_tablet) 2915 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2916 "hotkey_tablet_mode"); 2917 } 2918 2919 /* sysfs hotkey report_mode -------------------------------------------- */ 2920 static ssize_t hotkey_report_mode_show(struct device *dev, 2921 struct device_attribute *attr, 2922 char *buf) 2923 { 2924 return snprintf(buf, PAGE_SIZE, "%d\n", 2925 (hotkey_report_mode != 0) ? hotkey_report_mode : 1); 2926 } 2927 2928 static struct device_attribute dev_attr_hotkey_report_mode = 2929 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL); 2930 2931 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2932 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2933 struct device_attribute *attr, 2934 char *buf) 2935 { 2936 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2937 } 2938 2939 static struct device_attribute dev_attr_hotkey_wakeup_reason = 2940 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2941 2942 static void hotkey_wakeup_reason_notify_change(void) 2943 { 2944 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2945 "wakeup_reason"); 2946 } 2947 2948 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2949 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2950 struct device_attribute *attr, 2951 char *buf) 2952 { 2953 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2954 } 2955 2956 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete = 2957 __ATTR(wakeup_hotunplug_complete, S_IRUGO, 2958 hotkey_wakeup_hotunplug_complete_show, NULL); 2959 2960 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2961 { 2962 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2963 "wakeup_hotunplug_complete"); 2964 } 2965 2966 /* --------------------------------------------------------------------- */ 2967 2968 static struct attribute *hotkey_attributes[] __initdata = { 2969 &dev_attr_hotkey_enable.attr, 2970 &dev_attr_hotkey_bios_enabled.attr, 2971 &dev_attr_hotkey_bios_mask.attr, 2972 &dev_attr_hotkey_report_mode.attr, 2973 &dev_attr_hotkey_wakeup_reason.attr, 2974 &dev_attr_hotkey_wakeup_hotunplug_complete.attr, 2975 &dev_attr_hotkey_mask.attr, 2976 &dev_attr_hotkey_all_mask.attr, 2977 &dev_attr_hotkey_recommended_mask.attr, 2978 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2979 &dev_attr_hotkey_source_mask.attr, 2980 &dev_attr_hotkey_poll_freq.attr, 2981 #endif 2982 }; 2983 2984 /* 2985 * Sync both the hw and sw blocking state of all switches 2986 */ 2987 static void tpacpi_send_radiosw_update(void) 2988 { 2989 int wlsw; 2990 2991 /* 2992 * We must sync all rfkill controllers *before* issuing any 2993 * rfkill input events, or we will race the rfkill core input 2994 * handler. 2995 * 2996 * tpacpi_inputdev_send_mutex works as a syncronization point 2997 * for the above. 2998 * 2999 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3000 */ 3001 3002 wlsw = hotkey_get_wlsw(); 3003 3004 /* Sync hw blocking state first if it is hw-blocked */ 3005 if (wlsw == TPACPI_RFK_RADIO_OFF) 3006 tpacpi_rfk_update_hwblock_state(true); 3007 3008 /* Sync sw blocking state */ 3009 tpacpi_rfk_update_swstate_all(); 3010 3011 /* Sync hw blocking state last if it is hw-unblocked */ 3012 if (wlsw == TPACPI_RFK_RADIO_ON) 3013 tpacpi_rfk_update_hwblock_state(false); 3014 3015 /* Issue rfkill input event for WLSW switch */ 3016 if (!(wlsw < 0)) { 3017 mutex_lock(&tpacpi_inputdev_send_mutex); 3018 3019 input_report_switch(tpacpi_inputdev, 3020 SW_RFKILL_ALL, (wlsw > 0)); 3021 input_sync(tpacpi_inputdev); 3022 3023 mutex_unlock(&tpacpi_inputdev_send_mutex); 3024 } 3025 3026 /* 3027 * this can be unconditional, as we will poll state again 3028 * if userspace uses the notify to read data 3029 */ 3030 hotkey_radio_sw_notify_change(); 3031 } 3032 3033 static void hotkey_exit(void) 3034 { 3035 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3036 mutex_lock(&hotkey_mutex); 3037 hotkey_poll_stop_sync(); 3038 mutex_unlock(&hotkey_mutex); 3039 #endif 3040 3041 if (hotkey_dev_attributes) 3042 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3043 3044 kfree(hotkey_keycode_map); 3045 3046 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3047 "restoring original HKEY status and mask\n"); 3048 /* yes, there is a bitwise or below, we want the 3049 * functions to be called even if one of them fail */ 3050 if (((tp_features.hotkey_mask && 3051 hotkey_mask_set(hotkey_orig_mask)) | 3052 hotkey_status_set(false)) != 0) 3053 printk(TPACPI_ERR 3054 "failed to restore hot key mask " 3055 "to BIOS defaults\n"); 3056 } 3057 3058 static void __init hotkey_unmap(const unsigned int scancode) 3059 { 3060 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3061 clear_bit(hotkey_keycode_map[scancode], 3062 tpacpi_inputdev->keybit); 3063 hotkey_keycode_map[scancode] = KEY_RESERVED; 3064 } 3065 } 3066 3067 /* 3068 * HKEY quirks: 3069 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3070 */ 3071 3072 #define TPACPI_HK_Q_INIMASK 0x0001 3073 3074 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3075 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3076 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3077 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3078 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3079 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3080 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3081 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3082 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3083 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3084 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3085 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3086 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3087 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3088 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3089 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3090 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3091 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3092 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3093 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3094 }; 3095 3096 typedef u16 tpacpi_keymap_entry_t; 3097 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3098 3099 static int __init hotkey_init(struct ibm_init_struct *iibm) 3100 { 3101 /* Requirements for changing the default keymaps: 3102 * 3103 * 1. Many of the keys are mapped to KEY_RESERVED for very 3104 * good reasons. Do not change them unless you have deep 3105 * knowledge on the IBM and Lenovo ThinkPad firmware for 3106 * the various ThinkPad models. The driver behaves 3107 * differently for KEY_RESERVED: such keys have their 3108 * hot key mask *unset* in mask_recommended, and also 3109 * in the initial hot key mask programmed into the 3110 * firmware at driver load time, which means the firm- 3111 * ware may react very differently if you change them to 3112 * something else; 3113 * 3114 * 2. You must be subscribed to the linux-thinkpad and 3115 * ibm-acpi-devel mailing lists, and you should read the 3116 * list archives since 2007 if you want to change the 3117 * keymaps. This requirement exists so that you will 3118 * know the past history of problems with the thinkpad- 3119 * acpi driver keymaps, and also that you will be 3120 * listening to any bug reports; 3121 * 3122 * 3. Do not send thinkpad-acpi specific patches directly to 3123 * for merging, *ever*. Send them to the linux-acpi 3124 * mailinglist for comments. Merging is to be done only 3125 * through acpi-test and the ACPI maintainer. 3126 * 3127 * If the above is too much to ask, don't change the keymap. 3128 * Ask the thinkpad-acpi maintainer to do it, instead. 3129 */ 3130 3131 enum keymap_index { 3132 TPACPI_KEYMAP_IBM_GENERIC = 0, 3133 TPACPI_KEYMAP_LENOVO_GENERIC, 3134 }; 3135 3136 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3137 /* Generic keymap for IBM ThinkPads */ 3138 [TPACPI_KEYMAP_IBM_GENERIC] = { 3139 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3140 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3141 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3142 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3143 3144 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3145 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3146 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3147 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3148 3149 /* brightness: firmware always reacts to them */ 3150 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3151 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3152 3153 /* Thinklight: firmware always react to it */ 3154 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3155 3156 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3157 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3158 3159 /* Volume: firmware always react to it and reprograms 3160 * the built-in *extra* mixer. Never map it to control 3161 * another mixer by default. */ 3162 KEY_RESERVED, /* 0x14: VOLUME UP */ 3163 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3164 KEY_RESERVED, /* 0x16: MUTE */ 3165 3166 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3167 3168 /* (assignments unknown, please report if found) */ 3169 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3170 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3171 }, 3172 3173 /* Generic keymap for Lenovo ThinkPads */ 3174 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3175 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3176 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3177 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3178 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3179 3180 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3181 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3182 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3183 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3184 3185 /* These should be enabled --only-- when ACPI video 3186 * is disabled (i.e. in "vendor" mode), and are handled 3187 * in a special way by the init code */ 3188 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3189 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3190 3191 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3192 3193 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3194 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3195 3196 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3197 * react to it and reprograms the built-in *extra* mixer. 3198 * Never map it to control another mixer by default. 3199 * 3200 * T60?, T61, R60?, R61: firmware and EC tries to send 3201 * these over the regular keyboard, so these are no-ops, 3202 * but there are still weird bugs re. MUTE, so do not 3203 * change unless you get test reports from all Lenovo 3204 * models. May cause the BIOS to interfere with the 3205 * HDA mixer. 3206 */ 3207 KEY_RESERVED, /* 0x14: VOLUME UP */ 3208 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3209 KEY_RESERVED, /* 0x16: MUTE */ 3210 3211 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3212 3213 /* (assignments unknown, please report if found) */ 3214 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3215 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3216 }, 3217 }; 3218 3219 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3220 /* Generic maps (fallback) */ 3221 { 3222 .vendor = PCI_VENDOR_ID_IBM, 3223 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3224 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3225 }, 3226 { 3227 .vendor = PCI_VENDOR_ID_LENOVO, 3228 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3229 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3230 }, 3231 }; 3232 3233 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3234 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3235 3236 int res, i; 3237 int status; 3238 int hkeyv; 3239 bool radiosw_state = false; 3240 bool tabletsw_state = false; 3241 3242 unsigned long quirks; 3243 unsigned long keymap_id; 3244 3245 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3246 "initializing hotkey subdriver\n"); 3247 3248 BUG_ON(!tpacpi_inputdev); 3249 BUG_ON(tpacpi_inputdev->open != NULL || 3250 tpacpi_inputdev->close != NULL); 3251 3252 TPACPI_ACPIHANDLE_INIT(hkey); 3253 mutex_init(&hotkey_mutex); 3254 3255 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3256 mutex_init(&hotkey_thread_mutex); 3257 mutex_init(&hotkey_thread_data_mutex); 3258 #endif 3259 3260 /* hotkey not supported on 570 */ 3261 tp_features.hotkey = hkey_handle != NULL; 3262 3263 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3264 "hotkeys are %s\n", 3265 str_supported(tp_features.hotkey)); 3266 3267 if (!tp_features.hotkey) 3268 return 1; 3269 3270 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3271 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3272 3273 tpacpi_disable_brightness_delay(); 3274 3275 /* MUST have enough space for all attributes to be added to 3276 * hotkey_dev_attributes */ 3277 hotkey_dev_attributes = create_attr_set( 3278 ARRAY_SIZE(hotkey_attributes) + 2, 3279 NULL); 3280 if (!hotkey_dev_attributes) 3281 return -ENOMEM; 3282 res = add_many_to_attr_set(hotkey_dev_attributes, 3283 hotkey_attributes, 3284 ARRAY_SIZE(hotkey_attributes)); 3285 if (res) 3286 goto err_exit; 3287 3288 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3289 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3290 for HKEY interface version 0x100 */ 3291 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3292 if ((hkeyv >> 8) != 1) { 3293 printk(TPACPI_ERR "unknown version of the " 3294 "HKEY interface: 0x%x\n", hkeyv); 3295 printk(TPACPI_ERR "please report this to %s\n", 3296 TPACPI_MAIL); 3297 } else { 3298 /* 3299 * MHKV 0x100 in A31, R40, R40e, 3300 * T4x, X31, and later 3301 */ 3302 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3303 "firmware HKEY interface version: 0x%x\n", 3304 hkeyv); 3305 3306 /* Paranoia check AND init hotkey_all_mask */ 3307 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3308 "MHKA", "qd")) { 3309 printk(TPACPI_ERR 3310 "missing MHKA handler, " 3311 "please report this to %s\n", 3312 TPACPI_MAIL); 3313 /* Fallback: pre-init for FN+F3,F4,F12 */ 3314 hotkey_all_mask = 0x080cU; 3315 } else { 3316 tp_features.hotkey_mask = 1; 3317 } 3318 } 3319 } 3320 3321 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3322 "hotkey masks are %s\n", 3323 str_supported(tp_features.hotkey_mask)); 3324 3325 /* Init hotkey_all_mask if not initialized yet */ 3326 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3327 (quirks & TPACPI_HK_Q_INIMASK)) 3328 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3329 3330 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3331 if (tp_features.hotkey_mask) { 3332 /* hotkey_source_mask *must* be zero for 3333 * the first hotkey_mask_get to return hotkey_orig_mask */ 3334 res = hotkey_mask_get(); 3335 if (res) 3336 goto err_exit; 3337 3338 hotkey_orig_mask = hotkey_acpi_mask; 3339 } else { 3340 hotkey_orig_mask = hotkey_all_mask; 3341 hotkey_acpi_mask = hotkey_all_mask; 3342 } 3343 3344 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3345 if (dbg_wlswemul) { 3346 tp_features.hotkey_wlsw = 1; 3347 radiosw_state = !!tpacpi_wlsw_emulstate; 3348 printk(TPACPI_INFO 3349 "radio switch emulation enabled\n"); 3350 } else 3351 #endif 3352 /* Not all thinkpads have a hardware radio switch */ 3353 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3354 tp_features.hotkey_wlsw = 1; 3355 radiosw_state = !!status; 3356 printk(TPACPI_INFO 3357 "radio switch found; radios are %s\n", 3358 enabled(status, 0)); 3359 } 3360 if (tp_features.hotkey_wlsw) 3361 res = add_to_attr_set(hotkey_dev_attributes, 3362 &dev_attr_hotkey_radio_sw.attr); 3363 3364 /* For X41t, X60t, X61t Tablets... */ 3365 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3366 tp_features.hotkey_tablet = 1; 3367 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); 3368 printk(TPACPI_INFO 3369 "possible tablet mode switch found; " 3370 "ThinkPad in %s mode\n", 3371 (tabletsw_state) ? "tablet" : "laptop"); 3372 res = add_to_attr_set(hotkey_dev_attributes, 3373 &dev_attr_hotkey_tablet_mode.attr); 3374 } 3375 3376 if (!res) 3377 res = register_attr_set_with_sysfs( 3378 hotkey_dev_attributes, 3379 &tpacpi_pdev->dev.kobj); 3380 if (res) 3381 goto err_exit; 3382 3383 /* Set up key map */ 3384 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3385 GFP_KERNEL); 3386 if (!hotkey_keycode_map) { 3387 printk(TPACPI_ERR 3388 "failed to allocate memory for key map\n"); 3389 res = -ENOMEM; 3390 goto err_exit; 3391 } 3392 3393 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3394 ARRAY_SIZE(tpacpi_keymap_qtable)); 3395 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3396 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3397 "using keymap number %lu\n", keymap_id); 3398 3399 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3400 TPACPI_HOTKEY_MAP_SIZE); 3401 3402 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3403 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3404 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3405 tpacpi_inputdev->keycode = hotkey_keycode_map; 3406 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3407 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3408 input_set_capability(tpacpi_inputdev, EV_KEY, 3409 hotkey_keycode_map[i]); 3410 } else { 3411 if (i < sizeof(hotkey_reserved_mask)*8) 3412 hotkey_reserved_mask |= 1 << i; 3413 } 3414 } 3415 3416 if (tp_features.hotkey_wlsw) { 3417 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3418 input_report_switch(tpacpi_inputdev, 3419 SW_RFKILL_ALL, radiosw_state); 3420 } 3421 if (tp_features.hotkey_tablet) { 3422 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3423 input_report_switch(tpacpi_inputdev, 3424 SW_TABLET_MODE, tabletsw_state); 3425 } 3426 3427 /* Do not issue duplicate brightness change events to 3428 * userspace. tpacpi_detect_brightness_capabilities() must have 3429 * been called before this point */ 3430 if (tp_features.bright_acpimode && acpi_video_backlight_support()) { 3431 printk(TPACPI_INFO 3432 "This ThinkPad has standard ACPI backlight " 3433 "brightness control, supported by the ACPI " 3434 "video driver\n"); 3435 printk(TPACPI_NOTICE 3436 "Disabling thinkpad-acpi brightness events " 3437 "by default...\n"); 3438 3439 /* Disable brightness up/down on Lenovo thinkpads when 3440 * ACPI is handling them, otherwise it is plain impossible 3441 * for userspace to do something even remotely sane */ 3442 hotkey_reserved_mask |= 3443 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3444 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3445 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3446 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3447 } 3448 3449 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3450 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3451 & ~hotkey_all_mask 3452 & ~hotkey_reserved_mask; 3453 3454 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3455 "hotkey source mask 0x%08x, polling freq %u\n", 3456 hotkey_source_mask, hotkey_poll_freq); 3457 #endif 3458 3459 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3460 "enabling firmware HKEY event interface...\n"); 3461 res = hotkey_status_set(true); 3462 if (res) { 3463 hotkey_exit(); 3464 return res; 3465 } 3466 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3467 | hotkey_driver_mask) 3468 & ~hotkey_source_mask); 3469 if (res < 0 && res != -ENXIO) { 3470 hotkey_exit(); 3471 return res; 3472 } 3473 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3474 & ~hotkey_reserved_mask; 3475 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3476 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3477 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3478 3479 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3480 "legacy ibm/hotkey event reporting over procfs %s\n", 3481 (hotkey_report_mode < 2) ? 3482 "enabled" : "disabled"); 3483 3484 tpacpi_inputdev->open = &hotkey_inputdev_open; 3485 tpacpi_inputdev->close = &hotkey_inputdev_close; 3486 3487 hotkey_poll_setup_safe(true); 3488 3489 return 0; 3490 3491 err_exit: 3492 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3493 hotkey_dev_attributes = NULL; 3494 3495 return (res < 0)? res : 1; 3496 } 3497 3498 static bool hotkey_notify_hotkey(const u32 hkey, 3499 bool *send_acpi_ev, 3500 bool *ignore_acpi_ev) 3501 { 3502 /* 0x1000-0x1FFF: key presses */ 3503 unsigned int scancode = hkey & 0xfff; 3504 *send_acpi_ev = true; 3505 *ignore_acpi_ev = false; 3506 3507 /* HKEY event 0x1001 is scancode 0x00 */ 3508 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3509 scancode--; 3510 if (!(hotkey_source_mask & (1 << scancode))) { 3511 tpacpi_input_send_key_masked(scancode); 3512 *send_acpi_ev = false; 3513 } else { 3514 *ignore_acpi_ev = true; 3515 } 3516 return true; 3517 } 3518 return false; 3519 } 3520 3521 static bool hotkey_notify_wakeup(const u32 hkey, 3522 bool *send_acpi_ev, 3523 bool *ignore_acpi_ev) 3524 { 3525 /* 0x2000-0x2FFF: Wakeup reason */ 3526 *send_acpi_ev = true; 3527 *ignore_acpi_ev = false; 3528 3529 switch (hkey) { 3530 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3531 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3532 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3533 *ignore_acpi_ev = true; 3534 break; 3535 3536 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3537 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3538 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3539 *ignore_acpi_ev = true; 3540 break; 3541 3542 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3543 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3544 printk(TPACPI_ALERT 3545 "EMERGENCY WAKEUP: battery almost empty\n"); 3546 /* how to auto-heal: */ 3547 /* 2313: woke up from S3, go to S4/S5 */ 3548 /* 2413: woke up from S4, go to S5 */ 3549 break; 3550 3551 default: 3552 return false; 3553 } 3554 3555 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3556 printk(TPACPI_INFO 3557 "woke up due to a hot-unplug " 3558 "request...\n"); 3559 hotkey_wakeup_reason_notify_change(); 3560 } 3561 return true; 3562 } 3563 3564 static bool hotkey_notify_usrevent(const u32 hkey, 3565 bool *send_acpi_ev, 3566 bool *ignore_acpi_ev) 3567 { 3568 /* 0x5000-0x5FFF: human interface helpers */ 3569 *send_acpi_ev = true; 3570 *ignore_acpi_ev = false; 3571 3572 switch (hkey) { 3573 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3574 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3575 return true; 3576 3577 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3578 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3579 tpacpi_input_send_tabletsw(); 3580 hotkey_tablet_mode_notify_change(); 3581 *send_acpi_ev = false; 3582 return true; 3583 3584 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3585 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3586 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3587 /* do not propagate these events */ 3588 *ignore_acpi_ev = true; 3589 return true; 3590 3591 default: 3592 return false; 3593 } 3594 } 3595 3596 static void thermal_dump_all_sensors(void); 3597 3598 static bool hotkey_notify_thermal(const u32 hkey, 3599 bool *send_acpi_ev, 3600 bool *ignore_acpi_ev) 3601 { 3602 bool known = true; 3603 3604 /* 0x6000-0x6FFF: thermal alarms */ 3605 *send_acpi_ev = true; 3606 *ignore_acpi_ev = false; 3607 3608 switch (hkey) { 3609 case TP_HKEY_EV_THM_TABLE_CHANGED: 3610 printk(TPACPI_INFO 3611 "EC reports that Thermal Table has changed\n"); 3612 /* recommended action: do nothing, we don't have 3613 * Lenovo ATM information */ 3614 return true; 3615 case TP_HKEY_EV_ALARM_BAT_HOT: 3616 printk(TPACPI_CRIT 3617 "THERMAL ALARM: battery is too hot!\n"); 3618 /* recommended action: warn user through gui */ 3619 break; 3620 case TP_HKEY_EV_ALARM_BAT_XHOT: 3621 printk(TPACPI_ALERT 3622 "THERMAL EMERGENCY: battery is extremely hot!\n"); 3623 /* recommended action: immediate sleep/hibernate */ 3624 break; 3625 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3626 printk(TPACPI_CRIT 3627 "THERMAL ALARM: " 3628 "a sensor reports something is too hot!\n"); 3629 /* recommended action: warn user through gui, that */ 3630 /* some internal component is too hot */ 3631 break; 3632 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3633 printk(TPACPI_ALERT 3634 "THERMAL EMERGENCY: " 3635 "a sensor reports something is extremely hot!\n"); 3636 /* recommended action: immediate sleep/hibernate */ 3637 break; 3638 default: 3639 printk(TPACPI_ALERT 3640 "THERMAL ALERT: unknown thermal alarm received\n"); 3641 known = false; 3642 } 3643 3644 thermal_dump_all_sensors(); 3645 3646 return known; 3647 } 3648 3649 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3650 { 3651 u32 hkey; 3652 bool send_acpi_ev; 3653 bool ignore_acpi_ev; 3654 bool known_ev; 3655 3656 if (event != 0x80) { 3657 printk(TPACPI_ERR 3658 "unknown HKEY notification event %d\n", event); 3659 /* forward it to userspace, maybe it knows how to handle it */ 3660 acpi_bus_generate_netlink_event( 3661 ibm->acpi->device->pnp.device_class, 3662 dev_name(&ibm->acpi->device->dev), 3663 event, 0); 3664 return; 3665 } 3666 3667 while (1) { 3668 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3669 printk(TPACPI_ERR "failed to retrieve HKEY event\n"); 3670 return; 3671 } 3672 3673 if (hkey == 0) { 3674 /* queue empty */ 3675 return; 3676 } 3677 3678 send_acpi_ev = true; 3679 ignore_acpi_ev = false; 3680 3681 switch (hkey >> 12) { 3682 case 1: 3683 /* 0x1000-0x1FFF: key presses */ 3684 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3685 &ignore_acpi_ev); 3686 break; 3687 case 2: 3688 /* 0x2000-0x2FFF: Wakeup reason */ 3689 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3690 &ignore_acpi_ev); 3691 break; 3692 case 3: 3693 /* 0x3000-0x3FFF: bay-related wakeups */ 3694 switch (hkey) { 3695 case TP_HKEY_EV_BAYEJ_ACK: 3696 hotkey_autosleep_ack = 1; 3697 printk(TPACPI_INFO 3698 "bay ejected\n"); 3699 hotkey_wakeup_hotunplug_complete_notify_change(); 3700 known_ev = true; 3701 break; 3702 case TP_HKEY_EV_OPTDRV_EJ: 3703 /* FIXME: kick libata if SATA link offline */ 3704 known_ev = true; 3705 break; 3706 default: 3707 known_ev = false; 3708 } 3709 break; 3710 case 4: 3711 /* 0x4000-0x4FFF: dock-related wakeups */ 3712 if (hkey == TP_HKEY_EV_UNDOCK_ACK) { 3713 hotkey_autosleep_ack = 1; 3714 printk(TPACPI_INFO 3715 "undocked\n"); 3716 hotkey_wakeup_hotunplug_complete_notify_change(); 3717 known_ev = true; 3718 } else { 3719 known_ev = false; 3720 } 3721 break; 3722 case 5: 3723 /* 0x5000-0x5FFF: human interface helpers */ 3724 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3725 &ignore_acpi_ev); 3726 break; 3727 case 6: 3728 /* 0x6000-0x6FFF: thermal alarms */ 3729 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev, 3730 &ignore_acpi_ev); 3731 break; 3732 case 7: 3733 /* 0x7000-0x7FFF: misc */ 3734 if (tp_features.hotkey_wlsw && 3735 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3736 tpacpi_send_radiosw_update(); 3737 send_acpi_ev = 0; 3738 known_ev = true; 3739 break; 3740 } 3741 /* fallthrough to default */ 3742 default: 3743 known_ev = false; 3744 } 3745 if (!known_ev) { 3746 printk(TPACPI_NOTICE 3747 "unhandled HKEY event 0x%04x\n", hkey); 3748 printk(TPACPI_NOTICE 3749 "please report the conditions when this " 3750 "event happened to %s\n", TPACPI_MAIL); 3751 } 3752 3753 /* Legacy events */ 3754 if (!ignore_acpi_ev && 3755 (send_acpi_ev || hotkey_report_mode < 2)) { 3756 acpi_bus_generate_proc_event(ibm->acpi->device, 3757 event, hkey); 3758 } 3759 3760 /* netlink events */ 3761 if (!ignore_acpi_ev && send_acpi_ev) { 3762 acpi_bus_generate_netlink_event( 3763 ibm->acpi->device->pnp.device_class, 3764 dev_name(&ibm->acpi->device->dev), 3765 event, hkey); 3766 } 3767 } 3768 } 3769 3770 static void hotkey_suspend(pm_message_t state) 3771 { 3772 /* Do these on suspend, we get the events on early resume! */ 3773 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 3774 hotkey_autosleep_ack = 0; 3775 } 3776 3777 static void hotkey_resume(void) 3778 { 3779 tpacpi_disable_brightness_delay(); 3780 3781 if (hotkey_status_set(true) < 0 || 3782 hotkey_mask_set(hotkey_acpi_mask) < 0) 3783 printk(TPACPI_ERR 3784 "error while attempting to reset the event " 3785 "firmware interface\n"); 3786 3787 tpacpi_send_radiosw_update(); 3788 hotkey_tablet_mode_notify_change(); 3789 hotkey_wakeup_reason_notify_change(); 3790 hotkey_wakeup_hotunplug_complete_notify_change(); 3791 hotkey_poll_setup_safe(false); 3792 } 3793 3794 /* procfs -------------------------------------------------------------- */ 3795 static int hotkey_read(struct seq_file *m) 3796 { 3797 int res, status; 3798 3799 if (!tp_features.hotkey) { 3800 seq_printf(m, "status:\t\tnot supported\n"); 3801 return 0; 3802 } 3803 3804 if (mutex_lock_killable(&hotkey_mutex)) 3805 return -ERESTARTSYS; 3806 res = hotkey_status_get(&status); 3807 if (!res) 3808 res = hotkey_mask_get(); 3809 mutex_unlock(&hotkey_mutex); 3810 if (res) 3811 return res; 3812 3813 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 3814 if (hotkey_all_mask) { 3815 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 3816 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 3817 } else { 3818 seq_printf(m, "mask:\t\tnot supported\n"); 3819 seq_printf(m, "commands:\tenable, disable, reset\n"); 3820 } 3821 3822 return 0; 3823 } 3824 3825 static void hotkey_enabledisable_warn(bool enable) 3826 { 3827 tpacpi_log_usertask("procfs hotkey enable/disable"); 3828 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 3829 TPACPI_WARN 3830 "hotkey enable/disable functionality has been " 3831 "removed from the driver. Hotkeys are always " 3832 "enabled\n")) 3833 printk(TPACPI_ERR 3834 "Please remove the hotkey=enable module " 3835 "parameter, it is deprecated. Hotkeys are always " 3836 "enabled\n"); 3837 } 3838 3839 static int hotkey_write(char *buf) 3840 { 3841 int res; 3842 u32 mask; 3843 char *cmd; 3844 3845 if (!tp_features.hotkey) 3846 return -ENODEV; 3847 3848 if (mutex_lock_killable(&hotkey_mutex)) 3849 return -ERESTARTSYS; 3850 3851 mask = hotkey_user_mask; 3852 3853 res = 0; 3854 while ((cmd = next_cmd(&buf))) { 3855 if (strlencmp(cmd, "enable") == 0) { 3856 hotkey_enabledisable_warn(1); 3857 } else if (strlencmp(cmd, "disable") == 0) { 3858 hotkey_enabledisable_warn(0); 3859 res = -EPERM; 3860 } else if (strlencmp(cmd, "reset") == 0) { 3861 mask = (hotkey_all_mask | hotkey_source_mask) 3862 & ~hotkey_reserved_mask; 3863 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 3864 /* mask set */ 3865 } else if (sscanf(cmd, "%x", &mask) == 1) { 3866 /* mask set */ 3867 } else { 3868 res = -EINVAL; 3869 goto errexit; 3870 } 3871 } 3872 3873 if (!res) { 3874 tpacpi_disclose_usertask("procfs hotkey", 3875 "set mask to 0x%08x\n", mask); 3876 res = hotkey_user_mask_set(mask); 3877 } 3878 3879 errexit: 3880 mutex_unlock(&hotkey_mutex); 3881 return res; 3882 } 3883 3884 static const struct acpi_device_id ibm_htk_device_ids[] = { 3885 {TPACPI_ACPI_HKEY_HID, 0}, 3886 {"", 0}, 3887 }; 3888 3889 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 3890 .hid = ibm_htk_device_ids, 3891 .notify = hotkey_notify, 3892 .handle = &hkey_handle, 3893 .type = ACPI_DEVICE_NOTIFY, 3894 }; 3895 3896 static struct ibm_struct hotkey_driver_data = { 3897 .name = "hotkey", 3898 .read = hotkey_read, 3899 .write = hotkey_write, 3900 .exit = hotkey_exit, 3901 .resume = hotkey_resume, 3902 .suspend = hotkey_suspend, 3903 .acpi = &ibm_hotkey_acpidriver, 3904 }; 3905 3906 /************************************************************************* 3907 * Bluetooth subdriver 3908 */ 3909 3910 enum { 3911 /* ACPI GBDC/SBDC bits */ 3912 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 3913 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 3914 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 3915 0 = disable, 1 = enable */ 3916 }; 3917 3918 enum { 3919 /* ACPI \BLTH commands */ 3920 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 3921 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 3922 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 3923 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 3924 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 3925 }; 3926 3927 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 3928 3929 static int bluetooth_get_status(void) 3930 { 3931 int status; 3932 3933 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3934 if (dbg_bluetoothemul) 3935 return (tpacpi_bluetooth_emulstate) ? 3936 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3937 #endif 3938 3939 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 3940 return -EIO; 3941 3942 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 3943 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3944 } 3945 3946 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 3947 { 3948 int status; 3949 3950 vdbg_printk(TPACPI_DBG_RFKILL, 3951 "will attempt to %s bluetooth\n", 3952 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 3953 3954 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3955 if (dbg_bluetoothemul) { 3956 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 3957 return 0; 3958 } 3959 #endif 3960 3961 if (state == TPACPI_RFK_RADIO_ON) 3962 status = TP_ACPI_BLUETOOTH_RADIOSSW 3963 | TP_ACPI_BLUETOOTH_RESUMECTRL; 3964 else 3965 status = 0; 3966 3967 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 3968 return -EIO; 3969 3970 return 0; 3971 } 3972 3973 /* sysfs bluetooth enable ---------------------------------------------- */ 3974 static ssize_t bluetooth_enable_show(struct device *dev, 3975 struct device_attribute *attr, 3976 char *buf) 3977 { 3978 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 3979 attr, buf); 3980 } 3981 3982 static ssize_t bluetooth_enable_store(struct device *dev, 3983 struct device_attribute *attr, 3984 const char *buf, size_t count) 3985 { 3986 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 3987 attr, buf, count); 3988 } 3989 3990 static struct device_attribute dev_attr_bluetooth_enable = 3991 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO, 3992 bluetooth_enable_show, bluetooth_enable_store); 3993 3994 /* --------------------------------------------------------------------- */ 3995 3996 static struct attribute *bluetooth_attributes[] = { 3997 &dev_attr_bluetooth_enable.attr, 3998 NULL 3999 }; 4000 4001 static const struct attribute_group bluetooth_attr_group = { 4002 .attrs = bluetooth_attributes, 4003 }; 4004 4005 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4006 .get_status = bluetooth_get_status, 4007 .set_status = bluetooth_set_status, 4008 }; 4009 4010 static void bluetooth_shutdown(void) 4011 { 4012 /* Order firmware to save current state to NVRAM */ 4013 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4014 TP_ACPI_BLTH_SAVE_STATE)) 4015 printk(TPACPI_NOTICE 4016 "failed to save bluetooth state to NVRAM\n"); 4017 else 4018 vdbg_printk(TPACPI_DBG_RFKILL, 4019 "bluestooth state saved to NVRAM\n"); 4020 } 4021 4022 static void bluetooth_exit(void) 4023 { 4024 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4025 &bluetooth_attr_group); 4026 4027 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4028 4029 bluetooth_shutdown(); 4030 } 4031 4032 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4033 { 4034 int res; 4035 int status = 0; 4036 4037 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4038 "initializing bluetooth subdriver\n"); 4039 4040 TPACPI_ACPIHANDLE_INIT(hkey); 4041 4042 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4043 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4044 tp_features.bluetooth = hkey_handle && 4045 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4046 4047 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4048 "bluetooth is %s, status 0x%02x\n", 4049 str_supported(tp_features.bluetooth), 4050 status); 4051 4052 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4053 if (dbg_bluetoothemul) { 4054 tp_features.bluetooth = 1; 4055 printk(TPACPI_INFO 4056 "bluetooth switch emulation enabled\n"); 4057 } else 4058 #endif 4059 if (tp_features.bluetooth && 4060 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4061 /* no bluetooth hardware present in system */ 4062 tp_features.bluetooth = 0; 4063 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4064 "bluetooth hardware not installed\n"); 4065 } 4066 4067 if (!tp_features.bluetooth) 4068 return 1; 4069 4070 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4071 &bluetooth_tprfk_ops, 4072 RFKILL_TYPE_BLUETOOTH, 4073 TPACPI_RFK_BLUETOOTH_SW_NAME, 4074 true); 4075 if (res) 4076 return res; 4077 4078 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4079 &bluetooth_attr_group); 4080 if (res) { 4081 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4082 return res; 4083 } 4084 4085 return 0; 4086 } 4087 4088 /* procfs -------------------------------------------------------------- */ 4089 static int bluetooth_read(struct seq_file *m) 4090 { 4091 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4092 } 4093 4094 static int bluetooth_write(char *buf) 4095 { 4096 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4097 } 4098 4099 static struct ibm_struct bluetooth_driver_data = { 4100 .name = "bluetooth", 4101 .read = bluetooth_read, 4102 .write = bluetooth_write, 4103 .exit = bluetooth_exit, 4104 .shutdown = bluetooth_shutdown, 4105 }; 4106 4107 /************************************************************************* 4108 * Wan subdriver 4109 */ 4110 4111 enum { 4112 /* ACPI GWAN/SWAN bits */ 4113 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4114 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4115 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4116 0 = disable, 1 = enable */ 4117 }; 4118 4119 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4120 4121 static int wan_get_status(void) 4122 { 4123 int status; 4124 4125 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4126 if (dbg_wwanemul) 4127 return (tpacpi_wwan_emulstate) ? 4128 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4129 #endif 4130 4131 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4132 return -EIO; 4133 4134 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4135 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4136 } 4137 4138 static int wan_set_status(enum tpacpi_rfkill_state state) 4139 { 4140 int status; 4141 4142 vdbg_printk(TPACPI_DBG_RFKILL, 4143 "will attempt to %s wwan\n", 4144 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4145 4146 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4147 if (dbg_wwanemul) { 4148 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4149 return 0; 4150 } 4151 #endif 4152 4153 if (state == TPACPI_RFK_RADIO_ON) 4154 status = TP_ACPI_WANCARD_RADIOSSW 4155 | TP_ACPI_WANCARD_RESUMECTRL; 4156 else 4157 status = 0; 4158 4159 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4160 return -EIO; 4161 4162 return 0; 4163 } 4164 4165 /* sysfs wan enable ---------------------------------------------------- */ 4166 static ssize_t wan_enable_show(struct device *dev, 4167 struct device_attribute *attr, 4168 char *buf) 4169 { 4170 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4171 attr, buf); 4172 } 4173 4174 static ssize_t wan_enable_store(struct device *dev, 4175 struct device_attribute *attr, 4176 const char *buf, size_t count) 4177 { 4178 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4179 attr, buf, count); 4180 } 4181 4182 static struct device_attribute dev_attr_wan_enable = 4183 __ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4184 wan_enable_show, wan_enable_store); 4185 4186 /* --------------------------------------------------------------------- */ 4187 4188 static struct attribute *wan_attributes[] = { 4189 &dev_attr_wan_enable.attr, 4190 NULL 4191 }; 4192 4193 static const struct attribute_group wan_attr_group = { 4194 .attrs = wan_attributes, 4195 }; 4196 4197 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4198 .get_status = wan_get_status, 4199 .set_status = wan_set_status, 4200 }; 4201 4202 static void wan_shutdown(void) 4203 { 4204 /* Order firmware to save current state to NVRAM */ 4205 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4206 TP_ACPI_WGSV_SAVE_STATE)) 4207 printk(TPACPI_NOTICE 4208 "failed to save WWAN state to NVRAM\n"); 4209 else 4210 vdbg_printk(TPACPI_DBG_RFKILL, 4211 "WWAN state saved to NVRAM\n"); 4212 } 4213 4214 static void wan_exit(void) 4215 { 4216 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4217 &wan_attr_group); 4218 4219 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4220 4221 wan_shutdown(); 4222 } 4223 4224 static int __init wan_init(struct ibm_init_struct *iibm) 4225 { 4226 int res; 4227 int status = 0; 4228 4229 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4230 "initializing wan subdriver\n"); 4231 4232 TPACPI_ACPIHANDLE_INIT(hkey); 4233 4234 tp_features.wan = hkey_handle && 4235 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4236 4237 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4238 "wan is %s, status 0x%02x\n", 4239 str_supported(tp_features.wan), 4240 status); 4241 4242 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4243 if (dbg_wwanemul) { 4244 tp_features.wan = 1; 4245 printk(TPACPI_INFO 4246 "wwan switch emulation enabled\n"); 4247 } else 4248 #endif 4249 if (tp_features.wan && 4250 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4251 /* no wan hardware present in system */ 4252 tp_features.wan = 0; 4253 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4254 "wan hardware not installed\n"); 4255 } 4256 4257 if (!tp_features.wan) 4258 return 1; 4259 4260 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4261 &wan_tprfk_ops, 4262 RFKILL_TYPE_WWAN, 4263 TPACPI_RFK_WWAN_SW_NAME, 4264 true); 4265 if (res) 4266 return res; 4267 4268 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4269 &wan_attr_group); 4270 4271 if (res) { 4272 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4273 return res; 4274 } 4275 4276 return 0; 4277 } 4278 4279 /* procfs -------------------------------------------------------------- */ 4280 static int wan_read(struct seq_file *m) 4281 { 4282 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4283 } 4284 4285 static int wan_write(char *buf) 4286 { 4287 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4288 } 4289 4290 static struct ibm_struct wan_driver_data = { 4291 .name = "wan", 4292 .read = wan_read, 4293 .write = wan_write, 4294 .exit = wan_exit, 4295 .shutdown = wan_shutdown, 4296 }; 4297 4298 /************************************************************************* 4299 * UWB subdriver 4300 */ 4301 4302 enum { 4303 /* ACPI GUWB/SUWB bits */ 4304 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4305 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4306 }; 4307 4308 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4309 4310 static int uwb_get_status(void) 4311 { 4312 int status; 4313 4314 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4315 if (dbg_uwbemul) 4316 return (tpacpi_uwb_emulstate) ? 4317 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4318 #endif 4319 4320 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4321 return -EIO; 4322 4323 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4324 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4325 } 4326 4327 static int uwb_set_status(enum tpacpi_rfkill_state state) 4328 { 4329 int status; 4330 4331 vdbg_printk(TPACPI_DBG_RFKILL, 4332 "will attempt to %s UWB\n", 4333 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4334 4335 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4336 if (dbg_uwbemul) { 4337 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4338 return 0; 4339 } 4340 #endif 4341 4342 if (state == TPACPI_RFK_RADIO_ON) 4343 status = TP_ACPI_UWB_RADIOSSW; 4344 else 4345 status = 0; 4346 4347 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4348 return -EIO; 4349 4350 return 0; 4351 } 4352 4353 /* --------------------------------------------------------------------- */ 4354 4355 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4356 .get_status = uwb_get_status, 4357 .set_status = uwb_set_status, 4358 }; 4359 4360 static void uwb_exit(void) 4361 { 4362 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4363 } 4364 4365 static int __init uwb_init(struct ibm_init_struct *iibm) 4366 { 4367 int res; 4368 int status = 0; 4369 4370 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4371 "initializing uwb subdriver\n"); 4372 4373 TPACPI_ACPIHANDLE_INIT(hkey); 4374 4375 tp_features.uwb = hkey_handle && 4376 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4377 4378 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4379 "uwb is %s, status 0x%02x\n", 4380 str_supported(tp_features.uwb), 4381 status); 4382 4383 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4384 if (dbg_uwbemul) { 4385 tp_features.uwb = 1; 4386 printk(TPACPI_INFO 4387 "uwb switch emulation enabled\n"); 4388 } else 4389 #endif 4390 if (tp_features.uwb && 4391 !(status & TP_ACPI_UWB_HWPRESENT)) { 4392 /* no uwb hardware present in system */ 4393 tp_features.uwb = 0; 4394 dbg_printk(TPACPI_DBG_INIT, 4395 "uwb hardware not installed\n"); 4396 } 4397 4398 if (!tp_features.uwb) 4399 return 1; 4400 4401 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4402 &uwb_tprfk_ops, 4403 RFKILL_TYPE_UWB, 4404 TPACPI_RFK_UWB_SW_NAME, 4405 false); 4406 return res; 4407 } 4408 4409 static struct ibm_struct uwb_driver_data = { 4410 .name = "uwb", 4411 .exit = uwb_exit, 4412 .flags.experimental = 1, 4413 }; 4414 4415 /************************************************************************* 4416 * Video subdriver 4417 */ 4418 4419 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4420 4421 enum video_access_mode { 4422 TPACPI_VIDEO_NONE = 0, 4423 TPACPI_VIDEO_570, /* 570 */ 4424 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4425 TPACPI_VIDEO_NEW, /* all others */ 4426 }; 4427 4428 enum { /* video status flags, based on VIDEO_570 */ 4429 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4430 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4431 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4432 }; 4433 4434 enum { /* TPACPI_VIDEO_570 constants */ 4435 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4436 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4437 * video_status_flags */ 4438 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4439 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4440 }; 4441 4442 static enum video_access_mode video_supported; 4443 static int video_orig_autosw; 4444 4445 static int video_autosw_get(void); 4446 static int video_autosw_set(int enable); 4447 4448 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4449 4450 static int __init video_init(struct ibm_init_struct *iibm) 4451 { 4452 int ivga; 4453 4454 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4455 4456 TPACPI_ACPIHANDLE_INIT(vid); 4457 if (tpacpi_is_ibm()) 4458 TPACPI_ACPIHANDLE_INIT(vid2); 4459 4460 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4461 /* G41, assume IVGA doesn't change */ 4462 vid_handle = vid2_handle; 4463 4464 if (!vid_handle) 4465 /* video switching not supported on R30, R31 */ 4466 video_supported = TPACPI_VIDEO_NONE; 4467 else if (tpacpi_is_ibm() && 4468 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4469 /* 570 */ 4470 video_supported = TPACPI_VIDEO_570; 4471 else if (tpacpi_is_ibm() && 4472 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4473 /* 600e/x, 770e, 770x */ 4474 video_supported = TPACPI_VIDEO_770; 4475 else 4476 /* all others */ 4477 video_supported = TPACPI_VIDEO_NEW; 4478 4479 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4480 str_supported(video_supported != TPACPI_VIDEO_NONE), 4481 video_supported); 4482 4483 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1; 4484 } 4485 4486 static void video_exit(void) 4487 { 4488 dbg_printk(TPACPI_DBG_EXIT, 4489 "restoring original video autoswitch mode\n"); 4490 if (video_autosw_set(video_orig_autosw)) 4491 printk(TPACPI_ERR "error while trying to restore original " 4492 "video autoswitch mode\n"); 4493 } 4494 4495 static int video_outputsw_get(void) 4496 { 4497 int status = 0; 4498 int i; 4499 4500 switch (video_supported) { 4501 case TPACPI_VIDEO_570: 4502 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4503 TP_ACPI_VIDEO_570_PHSCMD)) 4504 return -EIO; 4505 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4506 break; 4507 case TPACPI_VIDEO_770: 4508 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4509 return -EIO; 4510 if (i) 4511 status |= TP_ACPI_VIDEO_S_LCD; 4512 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4513 return -EIO; 4514 if (i) 4515 status |= TP_ACPI_VIDEO_S_CRT; 4516 break; 4517 case TPACPI_VIDEO_NEW: 4518 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4519 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4520 return -EIO; 4521 if (i) 4522 status |= TP_ACPI_VIDEO_S_CRT; 4523 4524 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4525 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4526 return -EIO; 4527 if (i) 4528 status |= TP_ACPI_VIDEO_S_LCD; 4529 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4530 return -EIO; 4531 if (i) 4532 status |= TP_ACPI_VIDEO_S_DVI; 4533 break; 4534 default: 4535 return -ENOSYS; 4536 } 4537 4538 return status; 4539 } 4540 4541 static int video_outputsw_set(int status) 4542 { 4543 int autosw; 4544 int res = 0; 4545 4546 switch (video_supported) { 4547 case TPACPI_VIDEO_570: 4548 res = acpi_evalf(NULL, NULL, 4549 "\\_SB.PHS2", "vdd", 4550 TP_ACPI_VIDEO_570_PHS2CMD, 4551 status | TP_ACPI_VIDEO_570_PHS2SET); 4552 break; 4553 case TPACPI_VIDEO_770: 4554 autosw = video_autosw_get(); 4555 if (autosw < 0) 4556 return autosw; 4557 4558 res = video_autosw_set(1); 4559 if (res) 4560 return res; 4561 res = acpi_evalf(vid_handle, NULL, 4562 "ASWT", "vdd", status * 0x100, 0); 4563 if (!autosw && video_autosw_set(autosw)) { 4564 printk(TPACPI_ERR 4565 "video auto-switch left enabled due to error\n"); 4566 return -EIO; 4567 } 4568 break; 4569 case TPACPI_VIDEO_NEW: 4570 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4571 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4572 break; 4573 default: 4574 return -ENOSYS; 4575 } 4576 4577 return (res)? 0 : -EIO; 4578 } 4579 4580 static int video_autosw_get(void) 4581 { 4582 int autosw = 0; 4583 4584 switch (video_supported) { 4585 case TPACPI_VIDEO_570: 4586 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4587 return -EIO; 4588 break; 4589 case TPACPI_VIDEO_770: 4590 case TPACPI_VIDEO_NEW: 4591 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4592 return -EIO; 4593 break; 4594 default: 4595 return -ENOSYS; 4596 } 4597 4598 return autosw & 1; 4599 } 4600 4601 static int video_autosw_set(int enable) 4602 { 4603 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0)) 4604 return -EIO; 4605 return 0; 4606 } 4607 4608 static int video_outputsw_cycle(void) 4609 { 4610 int autosw = video_autosw_get(); 4611 int res; 4612 4613 if (autosw < 0) 4614 return autosw; 4615 4616 switch (video_supported) { 4617 case TPACPI_VIDEO_570: 4618 res = video_autosw_set(1); 4619 if (res) 4620 return res; 4621 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4622 break; 4623 case TPACPI_VIDEO_770: 4624 case TPACPI_VIDEO_NEW: 4625 res = video_autosw_set(1); 4626 if (res) 4627 return res; 4628 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4629 break; 4630 default: 4631 return -ENOSYS; 4632 } 4633 if (!autosw && video_autosw_set(autosw)) { 4634 printk(TPACPI_ERR 4635 "video auto-switch left enabled due to error\n"); 4636 return -EIO; 4637 } 4638 4639 return (res)? 0 : -EIO; 4640 } 4641 4642 static int video_expand_toggle(void) 4643 { 4644 switch (video_supported) { 4645 case TPACPI_VIDEO_570: 4646 return acpi_evalf(ec_handle, NULL, "_Q17", "v")? 4647 0 : -EIO; 4648 case TPACPI_VIDEO_770: 4649 return acpi_evalf(vid_handle, NULL, "VEXP", "v")? 4650 0 : -EIO; 4651 case TPACPI_VIDEO_NEW: 4652 return acpi_evalf(NULL, NULL, "\\VEXP", "v")? 4653 0 : -EIO; 4654 default: 4655 return -ENOSYS; 4656 } 4657 /* not reached */ 4658 } 4659 4660 static int video_read(struct seq_file *m) 4661 { 4662 int status, autosw; 4663 4664 if (video_supported == TPACPI_VIDEO_NONE) { 4665 seq_printf(m, "status:\t\tnot supported\n"); 4666 return 0; 4667 } 4668 4669 /* Even reads can crash X.org, so... */ 4670 if (!capable(CAP_SYS_ADMIN)) 4671 return -EPERM; 4672 4673 status = video_outputsw_get(); 4674 if (status < 0) 4675 return status; 4676 4677 autosw = video_autosw_get(); 4678 if (autosw < 0) 4679 return autosw; 4680 4681 seq_printf(m, "status:\t\tsupported\n"); 4682 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4683 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4684 if (video_supported == TPACPI_VIDEO_NEW) 4685 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 4686 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 4687 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 4688 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 4689 if (video_supported == TPACPI_VIDEO_NEW) 4690 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 4691 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 4692 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 4693 4694 return 0; 4695 } 4696 4697 static int video_write(char *buf) 4698 { 4699 char *cmd; 4700 int enable, disable, status; 4701 int res; 4702 4703 if (video_supported == TPACPI_VIDEO_NONE) 4704 return -ENODEV; 4705 4706 /* Even reads can crash X.org, let alone writes... */ 4707 if (!capable(CAP_SYS_ADMIN)) 4708 return -EPERM; 4709 4710 enable = 0; 4711 disable = 0; 4712 4713 while ((cmd = next_cmd(&buf))) { 4714 if (strlencmp(cmd, "lcd_enable") == 0) { 4715 enable |= TP_ACPI_VIDEO_S_LCD; 4716 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4717 disable |= TP_ACPI_VIDEO_S_LCD; 4718 } else if (strlencmp(cmd, "crt_enable") == 0) { 4719 enable |= TP_ACPI_VIDEO_S_CRT; 4720 } else if (strlencmp(cmd, "crt_disable") == 0) { 4721 disable |= TP_ACPI_VIDEO_S_CRT; 4722 } else if (video_supported == TPACPI_VIDEO_NEW && 4723 strlencmp(cmd, "dvi_enable") == 0) { 4724 enable |= TP_ACPI_VIDEO_S_DVI; 4725 } else if (video_supported == TPACPI_VIDEO_NEW && 4726 strlencmp(cmd, "dvi_disable") == 0) { 4727 disable |= TP_ACPI_VIDEO_S_DVI; 4728 } else if (strlencmp(cmd, "auto_enable") == 0) { 4729 res = video_autosw_set(1); 4730 if (res) 4731 return res; 4732 } else if (strlencmp(cmd, "auto_disable") == 0) { 4733 res = video_autosw_set(0); 4734 if (res) 4735 return res; 4736 } else if (strlencmp(cmd, "video_switch") == 0) { 4737 res = video_outputsw_cycle(); 4738 if (res) 4739 return res; 4740 } else if (strlencmp(cmd, "expand_toggle") == 0) { 4741 res = video_expand_toggle(); 4742 if (res) 4743 return res; 4744 } else 4745 return -EINVAL; 4746 } 4747 4748 if (enable || disable) { 4749 status = video_outputsw_get(); 4750 if (status < 0) 4751 return status; 4752 res = video_outputsw_set((status & ~disable) | enable); 4753 if (res) 4754 return res; 4755 } 4756 4757 return 0; 4758 } 4759 4760 static struct ibm_struct video_driver_data = { 4761 .name = "video", 4762 .read = video_read, 4763 .write = video_write, 4764 .exit = video_exit, 4765 }; 4766 4767 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 4768 4769 /************************************************************************* 4770 * Light (thinklight) subdriver 4771 */ 4772 4773 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 4774 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 4775 4776 static int light_get_status(void) 4777 { 4778 int status = 0; 4779 4780 if (tp_features.light_status) { 4781 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 4782 return -EIO; 4783 return (!!status); 4784 } 4785 4786 return -ENXIO; 4787 } 4788 4789 static int light_set_status(int status) 4790 { 4791 int rc; 4792 4793 if (tp_features.light) { 4794 if (cmos_handle) { 4795 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 4796 (status)? 4797 TP_CMOS_THINKLIGHT_ON : 4798 TP_CMOS_THINKLIGHT_OFF); 4799 } else { 4800 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 4801 (status)? 1 : 0); 4802 } 4803 return (rc)? 0 : -EIO; 4804 } 4805 4806 return -ENXIO; 4807 } 4808 4809 static void light_set_status_worker(struct work_struct *work) 4810 { 4811 struct tpacpi_led_classdev *data = 4812 container_of(work, struct tpacpi_led_classdev, work); 4813 4814 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 4815 light_set_status((data->new_state != TPACPI_LED_OFF)); 4816 } 4817 4818 static void light_sysfs_set(struct led_classdev *led_cdev, 4819 enum led_brightness brightness) 4820 { 4821 struct tpacpi_led_classdev *data = 4822 container_of(led_cdev, 4823 struct tpacpi_led_classdev, 4824 led_classdev); 4825 data->new_state = (brightness != LED_OFF) ? 4826 TPACPI_LED_ON : TPACPI_LED_OFF; 4827 queue_work(tpacpi_wq, &data->work); 4828 } 4829 4830 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 4831 { 4832 return (light_get_status() == 1)? LED_FULL : LED_OFF; 4833 } 4834 4835 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 4836 .led_classdev = { 4837 .name = "tpacpi::thinklight", 4838 .brightness_set = &light_sysfs_set, 4839 .brightness_get = &light_sysfs_get, 4840 } 4841 }; 4842 4843 static int __init light_init(struct ibm_init_struct *iibm) 4844 { 4845 int rc; 4846 4847 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 4848 4849 if (tpacpi_is_ibm()) { 4850 TPACPI_ACPIHANDLE_INIT(ledb); 4851 TPACPI_ACPIHANDLE_INIT(lght); 4852 } 4853 TPACPI_ACPIHANDLE_INIT(cmos); 4854 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 4855 4856 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 4857 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 4858 4859 if (tp_features.light) 4860 /* light status not supported on 4861 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 4862 tp_features.light_status = 4863 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 4864 4865 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 4866 str_supported(tp_features.light), 4867 str_supported(tp_features.light_status)); 4868 4869 if (!tp_features.light) 4870 return 1; 4871 4872 rc = led_classdev_register(&tpacpi_pdev->dev, 4873 &tpacpi_led_thinklight.led_classdev); 4874 4875 if (rc < 0) { 4876 tp_features.light = 0; 4877 tp_features.light_status = 0; 4878 } else { 4879 rc = 0; 4880 } 4881 4882 return rc; 4883 } 4884 4885 static void light_exit(void) 4886 { 4887 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 4888 if (work_pending(&tpacpi_led_thinklight.work)) 4889 flush_workqueue(tpacpi_wq); 4890 } 4891 4892 static int light_read(struct seq_file *m) 4893 { 4894 int status; 4895 4896 if (!tp_features.light) { 4897 seq_printf(m, "status:\t\tnot supported\n"); 4898 } else if (!tp_features.light_status) { 4899 seq_printf(m, "status:\t\tunknown\n"); 4900 seq_printf(m, "commands:\ton, off\n"); 4901 } else { 4902 status = light_get_status(); 4903 if (status < 0) 4904 return status; 4905 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 4906 seq_printf(m, "commands:\ton, off\n"); 4907 } 4908 4909 return 0; 4910 } 4911 4912 static int light_write(char *buf) 4913 { 4914 char *cmd; 4915 int newstatus = 0; 4916 4917 if (!tp_features.light) 4918 return -ENODEV; 4919 4920 while ((cmd = next_cmd(&buf))) { 4921 if (strlencmp(cmd, "on") == 0) { 4922 newstatus = 1; 4923 } else if (strlencmp(cmd, "off") == 0) { 4924 newstatus = 0; 4925 } else 4926 return -EINVAL; 4927 } 4928 4929 return light_set_status(newstatus); 4930 } 4931 4932 static struct ibm_struct light_driver_data = { 4933 .name = "light", 4934 .read = light_read, 4935 .write = light_write, 4936 .exit = light_exit, 4937 }; 4938 4939 /************************************************************************* 4940 * CMOS subdriver 4941 */ 4942 4943 /* sysfs cmos_command -------------------------------------------------- */ 4944 static ssize_t cmos_command_store(struct device *dev, 4945 struct device_attribute *attr, 4946 const char *buf, size_t count) 4947 { 4948 unsigned long cmos_cmd; 4949 int res; 4950 4951 if (parse_strtoul(buf, 21, &cmos_cmd)) 4952 return -EINVAL; 4953 4954 res = issue_thinkpad_cmos_command(cmos_cmd); 4955 return (res)? res : count; 4956 } 4957 4958 static struct device_attribute dev_attr_cmos_command = 4959 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store); 4960 4961 /* --------------------------------------------------------------------- */ 4962 4963 static int __init cmos_init(struct ibm_init_struct *iibm) 4964 { 4965 int res; 4966 4967 vdbg_printk(TPACPI_DBG_INIT, 4968 "initializing cmos commands subdriver\n"); 4969 4970 TPACPI_ACPIHANDLE_INIT(cmos); 4971 4972 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 4973 str_supported(cmos_handle != NULL)); 4974 4975 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4976 if (res) 4977 return res; 4978 4979 return (cmos_handle)? 0 : 1; 4980 } 4981 4982 static void cmos_exit(void) 4983 { 4984 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4985 } 4986 4987 static int cmos_read(struct seq_file *m) 4988 { 4989 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4990 R30, R31, T20-22, X20-21 */ 4991 if (!cmos_handle) 4992 seq_printf(m, "status:\t\tnot supported\n"); 4993 else { 4994 seq_printf(m, "status:\t\tsupported\n"); 4995 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 4996 } 4997 4998 return 0; 4999 } 5000 5001 static int cmos_write(char *buf) 5002 { 5003 char *cmd; 5004 int cmos_cmd, res; 5005 5006 while ((cmd = next_cmd(&buf))) { 5007 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5008 cmos_cmd >= 0 && cmos_cmd <= 21) { 5009 /* cmos_cmd set */ 5010 } else 5011 return -EINVAL; 5012 5013 res = issue_thinkpad_cmos_command(cmos_cmd); 5014 if (res) 5015 return res; 5016 } 5017 5018 return 0; 5019 } 5020 5021 static struct ibm_struct cmos_driver_data = { 5022 .name = "cmos", 5023 .read = cmos_read, 5024 .write = cmos_write, 5025 .exit = cmos_exit, 5026 }; 5027 5028 /************************************************************************* 5029 * LED subdriver 5030 */ 5031 5032 enum led_access_mode { 5033 TPACPI_LED_NONE = 0, 5034 TPACPI_LED_570, /* 570 */ 5035 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5036 TPACPI_LED_NEW, /* all others */ 5037 }; 5038 5039 enum { /* For TPACPI_LED_OLD */ 5040 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5041 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5042 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5043 }; 5044 5045 static enum led_access_mode led_supported; 5046 5047 static acpi_handle led_handle; 5048 5049 #define TPACPI_LED_NUMLEDS 16 5050 static struct tpacpi_led_classdev *tpacpi_leds; 5051 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5052 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5053 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5054 "tpacpi::power", 5055 "tpacpi:orange:batt", 5056 "tpacpi:green:batt", 5057 "tpacpi::dock_active", 5058 "tpacpi::bay_active", 5059 "tpacpi::dock_batt", 5060 "tpacpi::unknown_led", 5061 "tpacpi::standby", 5062 "tpacpi::dock_status1", 5063 "tpacpi::dock_status2", 5064 "tpacpi::unknown_led2", 5065 "tpacpi::unknown_led3", 5066 "tpacpi::thinkvantage", 5067 }; 5068 #define TPACPI_SAFE_LEDS 0x1081U 5069 5070 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5071 { 5072 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5073 return false; 5074 #else 5075 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5076 #endif 5077 } 5078 5079 static int led_get_status(const unsigned int led) 5080 { 5081 int status; 5082 enum led_status_t led_s; 5083 5084 switch (led_supported) { 5085 case TPACPI_LED_570: 5086 if (!acpi_evalf(ec_handle, 5087 &status, "GLED", "dd", 1 << led)) 5088 return -EIO; 5089 led_s = (status == 0)? 5090 TPACPI_LED_OFF : 5091 ((status == 1)? 5092 TPACPI_LED_ON : 5093 TPACPI_LED_BLINK); 5094 tpacpi_led_state_cache[led] = led_s; 5095 return led_s; 5096 default: 5097 return -ENXIO; 5098 } 5099 5100 /* not reached */ 5101 } 5102 5103 static int led_set_status(const unsigned int led, 5104 const enum led_status_t ledstatus) 5105 { 5106 /* off, on, blink. Index is led_status_t */ 5107 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5108 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5109 5110 int rc = 0; 5111 5112 switch (led_supported) { 5113 case TPACPI_LED_570: 5114 /* 570 */ 5115 if (unlikely(led > 7)) 5116 return -EINVAL; 5117 if (unlikely(tpacpi_is_led_restricted(led))) 5118 return -EPERM; 5119 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5120 (1 << led), led_sled_arg1[ledstatus])) 5121 rc = -EIO; 5122 break; 5123 case TPACPI_LED_OLD: 5124 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5125 if (unlikely(led > 7)) 5126 return -EINVAL; 5127 if (unlikely(tpacpi_is_led_restricted(led))) 5128 return -EPERM; 5129 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5130 if (rc >= 0) 5131 rc = ec_write(TPACPI_LED_EC_HLBL, 5132 (ledstatus == TPACPI_LED_BLINK) << led); 5133 if (rc >= 0) 5134 rc = ec_write(TPACPI_LED_EC_HLCL, 5135 (ledstatus != TPACPI_LED_OFF) << led); 5136 break; 5137 case TPACPI_LED_NEW: 5138 /* all others */ 5139 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5140 return -EINVAL; 5141 if (unlikely(tpacpi_is_led_restricted(led))) 5142 return -EPERM; 5143 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5144 led, led_led_arg1[ledstatus])) 5145 rc = -EIO; 5146 break; 5147 default: 5148 rc = -ENXIO; 5149 } 5150 5151 if (!rc) 5152 tpacpi_led_state_cache[led] = ledstatus; 5153 5154 return rc; 5155 } 5156 5157 static void led_set_status_worker(struct work_struct *work) 5158 { 5159 struct tpacpi_led_classdev *data = 5160 container_of(work, struct tpacpi_led_classdev, work); 5161 5162 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5163 led_set_status(data->led, data->new_state); 5164 } 5165 5166 static void led_sysfs_set(struct led_classdev *led_cdev, 5167 enum led_brightness brightness) 5168 { 5169 struct tpacpi_led_classdev *data = container_of(led_cdev, 5170 struct tpacpi_led_classdev, led_classdev); 5171 5172 if (brightness == LED_OFF) 5173 data->new_state = TPACPI_LED_OFF; 5174 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5175 data->new_state = TPACPI_LED_ON; 5176 else 5177 data->new_state = TPACPI_LED_BLINK; 5178 5179 queue_work(tpacpi_wq, &data->work); 5180 } 5181 5182 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5183 unsigned long *delay_on, unsigned long *delay_off) 5184 { 5185 struct tpacpi_led_classdev *data = container_of(led_cdev, 5186 struct tpacpi_led_classdev, led_classdev); 5187 5188 /* Can we choose the flash rate? */ 5189 if (*delay_on == 0 && *delay_off == 0) { 5190 /* yes. set them to the hardware blink rate (1 Hz) */ 5191 *delay_on = 500; /* ms */ 5192 *delay_off = 500; /* ms */ 5193 } else if ((*delay_on != 500) || (*delay_off != 500)) 5194 return -EINVAL; 5195 5196 data->new_state = TPACPI_LED_BLINK; 5197 queue_work(tpacpi_wq, &data->work); 5198 5199 return 0; 5200 } 5201 5202 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5203 { 5204 int rc; 5205 5206 struct tpacpi_led_classdev *data = container_of(led_cdev, 5207 struct tpacpi_led_classdev, led_classdev); 5208 5209 rc = led_get_status(data->led); 5210 5211 if (rc == TPACPI_LED_OFF || rc < 0) 5212 rc = LED_OFF; /* no error handling in led class :( */ 5213 else 5214 rc = LED_FULL; 5215 5216 return rc; 5217 } 5218 5219 static void led_exit(void) 5220 { 5221 unsigned int i; 5222 5223 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5224 if (tpacpi_leds[i].led_classdev.name) 5225 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5226 } 5227 5228 kfree(tpacpi_leds); 5229 } 5230 5231 static int __init tpacpi_init_led(unsigned int led) 5232 { 5233 int rc; 5234 5235 tpacpi_leds[led].led = led; 5236 5237 /* LEDs with no name don't get registered */ 5238 if (!tpacpi_led_names[led]) 5239 return 0; 5240 5241 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5242 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5243 if (led_supported == TPACPI_LED_570) 5244 tpacpi_leds[led].led_classdev.brightness_get = 5245 &led_sysfs_get; 5246 5247 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5248 5249 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5250 5251 rc = led_classdev_register(&tpacpi_pdev->dev, 5252 &tpacpi_leds[led].led_classdev); 5253 if (rc < 0) 5254 tpacpi_leds[led].led_classdev.name = NULL; 5255 5256 return rc; 5257 } 5258 5259 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5260 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5261 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5262 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5263 5264 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5265 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5266 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5267 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5268 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5269 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5270 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5271 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5272 5273 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5274 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5275 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5276 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5277 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5278 5279 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5280 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5281 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5282 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5283 5284 /* (1) - may have excess leds enabled on MSB */ 5285 5286 /* Defaults (order matters, keep last, don't reorder!) */ 5287 { /* Lenovo */ 5288 .vendor = PCI_VENDOR_ID_LENOVO, 5289 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5290 .quirks = 0x1fffU, 5291 }, 5292 { /* IBM ThinkPads with no EC version string */ 5293 .vendor = PCI_VENDOR_ID_IBM, 5294 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5295 .quirks = 0x00ffU, 5296 }, 5297 { /* IBM ThinkPads with EC version string */ 5298 .vendor = PCI_VENDOR_ID_IBM, 5299 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5300 .quirks = 0x00bfU, 5301 }, 5302 }; 5303 5304 #undef TPACPI_LEDQ_IBM 5305 #undef TPACPI_LEDQ_LNV 5306 5307 static enum led_access_mode __init led_init_detect_mode(void) 5308 { 5309 acpi_status status; 5310 5311 if (tpacpi_is_ibm()) { 5312 /* 570 */ 5313 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5314 if (ACPI_SUCCESS(status)) 5315 return TPACPI_LED_570; 5316 5317 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5318 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5319 if (ACPI_SUCCESS(status)) 5320 return TPACPI_LED_OLD; 5321 } 5322 5323 /* most others */ 5324 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5325 if (ACPI_SUCCESS(status)) 5326 return TPACPI_LED_NEW; 5327 5328 /* R30, R31, and unknown firmwares */ 5329 led_handle = NULL; 5330 return TPACPI_LED_NONE; 5331 } 5332 5333 static int __init led_init(struct ibm_init_struct *iibm) 5334 { 5335 unsigned int i; 5336 int rc; 5337 unsigned long useful_leds; 5338 5339 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5340 5341 led_supported = led_init_detect_mode(); 5342 5343 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5344 str_supported(led_supported), led_supported); 5345 5346 if (led_supported == TPACPI_LED_NONE) 5347 return 1; 5348 5349 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5350 GFP_KERNEL); 5351 if (!tpacpi_leds) { 5352 printk(TPACPI_ERR "Out of memory for LED data\n"); 5353 return -ENOMEM; 5354 } 5355 5356 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5357 ARRAY_SIZE(led_useful_qtable)); 5358 5359 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5360 if (!tpacpi_is_led_restricted(i) && 5361 test_bit(i, &useful_leds)) { 5362 rc = tpacpi_init_led(i); 5363 if (rc < 0) { 5364 led_exit(); 5365 return rc; 5366 } 5367 } 5368 } 5369 5370 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5371 printk(TPACPI_NOTICE 5372 "warning: userspace override of important " 5373 "firmware LEDs is enabled\n"); 5374 #endif 5375 return 0; 5376 } 5377 5378 #define str_led_status(s) \ 5379 ((s) == TPACPI_LED_OFF ? "off" : \ 5380 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5381 5382 static int led_read(struct seq_file *m) 5383 { 5384 if (!led_supported) { 5385 seq_printf(m, "status:\t\tnot supported\n"); 5386 return 0; 5387 } 5388 seq_printf(m, "status:\t\tsupported\n"); 5389 5390 if (led_supported == TPACPI_LED_570) { 5391 /* 570 */ 5392 int i, status; 5393 for (i = 0; i < 8; i++) { 5394 status = led_get_status(i); 5395 if (status < 0) 5396 return -EIO; 5397 seq_printf(m, "%d:\t\t%s\n", 5398 i, str_led_status(status)); 5399 } 5400 } 5401 5402 seq_printf(m, "commands:\t" 5403 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5404 5405 return 0; 5406 } 5407 5408 static int led_write(char *buf) 5409 { 5410 char *cmd; 5411 int led, rc; 5412 enum led_status_t s; 5413 5414 if (!led_supported) 5415 return -ENODEV; 5416 5417 while ((cmd = next_cmd(&buf))) { 5418 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15) 5419 return -EINVAL; 5420 5421 if (strstr(cmd, "off")) { 5422 s = TPACPI_LED_OFF; 5423 } else if (strstr(cmd, "on")) { 5424 s = TPACPI_LED_ON; 5425 } else if (strstr(cmd, "blink")) { 5426 s = TPACPI_LED_BLINK; 5427 } else { 5428 return -EINVAL; 5429 } 5430 5431 rc = led_set_status(led, s); 5432 if (rc < 0) 5433 return rc; 5434 } 5435 5436 return 0; 5437 } 5438 5439 static struct ibm_struct led_driver_data = { 5440 .name = "led", 5441 .read = led_read, 5442 .write = led_write, 5443 .exit = led_exit, 5444 }; 5445 5446 /************************************************************************* 5447 * Beep subdriver 5448 */ 5449 5450 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5451 5452 #define TPACPI_BEEP_Q1 0x0001 5453 5454 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5455 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5456 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5457 }; 5458 5459 static int __init beep_init(struct ibm_init_struct *iibm) 5460 { 5461 unsigned long quirks; 5462 5463 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5464 5465 TPACPI_ACPIHANDLE_INIT(beep); 5466 5467 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5468 str_supported(beep_handle != NULL)); 5469 5470 quirks = tpacpi_check_quirks(beep_quirk_table, 5471 ARRAY_SIZE(beep_quirk_table)); 5472 5473 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5474 5475 return (beep_handle)? 0 : 1; 5476 } 5477 5478 static int beep_read(struct seq_file *m) 5479 { 5480 if (!beep_handle) 5481 seq_printf(m, "status:\t\tnot supported\n"); 5482 else { 5483 seq_printf(m, "status:\t\tsupported\n"); 5484 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5485 } 5486 5487 return 0; 5488 } 5489 5490 static int beep_write(char *buf) 5491 { 5492 char *cmd; 5493 int beep_cmd; 5494 5495 if (!beep_handle) 5496 return -ENODEV; 5497 5498 while ((cmd = next_cmd(&buf))) { 5499 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 5500 beep_cmd >= 0 && beep_cmd <= 17) { 5501 /* beep_cmd set */ 5502 } else 5503 return -EINVAL; 5504 if (tp_features.beep_needs_two_args) { 5505 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 5506 beep_cmd, 0)) 5507 return -EIO; 5508 } else { 5509 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 5510 beep_cmd)) 5511 return -EIO; 5512 } 5513 } 5514 5515 return 0; 5516 } 5517 5518 static struct ibm_struct beep_driver_data = { 5519 .name = "beep", 5520 .read = beep_read, 5521 .write = beep_write, 5522 }; 5523 5524 /************************************************************************* 5525 * Thermal subdriver 5526 */ 5527 5528 enum thermal_access_mode { 5529 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 5530 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 5531 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 5532 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 5533 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 5534 }; 5535 5536 enum { /* TPACPI_THERMAL_TPEC_* */ 5537 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 5538 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 5539 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 5540 5541 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 5542 }; 5543 5544 5545 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 5546 struct ibm_thermal_sensors_struct { 5547 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 5548 }; 5549 5550 static enum thermal_access_mode thermal_read_mode; 5551 5552 /* idx is zero-based */ 5553 static int thermal_get_sensor(int idx, s32 *value) 5554 { 5555 int t; 5556 s8 tmp; 5557 char tmpi[5]; 5558 5559 t = TP_EC_THERMAL_TMP0; 5560 5561 switch (thermal_read_mode) { 5562 #if TPACPI_MAX_THERMAL_SENSORS >= 16 5563 case TPACPI_THERMAL_TPEC_16: 5564 if (idx >= 8 && idx <= 15) { 5565 t = TP_EC_THERMAL_TMP8; 5566 idx -= 8; 5567 } 5568 /* fallthrough */ 5569 #endif 5570 case TPACPI_THERMAL_TPEC_8: 5571 if (idx <= 7) { 5572 if (!acpi_ec_read(t + idx, &tmp)) 5573 return -EIO; 5574 *value = tmp * 1000; 5575 return 0; 5576 } 5577 break; 5578 5579 case TPACPI_THERMAL_ACPI_UPDT: 5580 if (idx <= 7) { 5581 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5582 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 5583 return -EIO; 5584 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5585 return -EIO; 5586 *value = (t - 2732) * 100; 5587 return 0; 5588 } 5589 break; 5590 5591 case TPACPI_THERMAL_ACPI_TMP07: 5592 if (idx <= 7) { 5593 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5594 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5595 return -EIO; 5596 if (t > 127 || t < -127) 5597 t = TP_EC_THERMAL_TMP_NA; 5598 *value = t * 1000; 5599 return 0; 5600 } 5601 break; 5602 5603 case TPACPI_THERMAL_NONE: 5604 default: 5605 return -ENOSYS; 5606 } 5607 5608 return -EINVAL; 5609 } 5610 5611 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 5612 { 5613 int res, i; 5614 int n; 5615 5616 n = 8; 5617 i = 0; 5618 5619 if (!s) 5620 return -EINVAL; 5621 5622 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 5623 n = 16; 5624 5625 for (i = 0 ; i < n; i++) { 5626 res = thermal_get_sensor(i, &s->temp[i]); 5627 if (res) 5628 return res; 5629 } 5630 5631 return n; 5632 } 5633 5634 static void thermal_dump_all_sensors(void) 5635 { 5636 int n, i; 5637 struct ibm_thermal_sensors_struct t; 5638 5639 n = thermal_get_sensors(&t); 5640 if (n <= 0) 5641 return; 5642 5643 printk(TPACPI_NOTICE 5644 "temperatures (Celsius):"); 5645 5646 for (i = 0; i < n; i++) { 5647 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 5648 printk(KERN_CONT " %d", (int)(t.temp[i] / 1000)); 5649 else 5650 printk(KERN_CONT " N/A"); 5651 } 5652 5653 printk(KERN_CONT "\n"); 5654 } 5655 5656 /* sysfs temp##_input -------------------------------------------------- */ 5657 5658 static ssize_t thermal_temp_input_show(struct device *dev, 5659 struct device_attribute *attr, 5660 char *buf) 5661 { 5662 struct sensor_device_attribute *sensor_attr = 5663 to_sensor_dev_attr(attr); 5664 int idx = sensor_attr->index; 5665 s32 value; 5666 int res; 5667 5668 res = thermal_get_sensor(idx, &value); 5669 if (res) 5670 return res; 5671 if (value == TPACPI_THERMAL_SENSOR_NA) 5672 return -ENXIO; 5673 5674 return snprintf(buf, PAGE_SIZE, "%d\n", value); 5675 } 5676 5677 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 5678 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 5679 thermal_temp_input_show, NULL, _idxB) 5680 5681 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 5682 THERMAL_SENSOR_ATTR_TEMP(1, 0), 5683 THERMAL_SENSOR_ATTR_TEMP(2, 1), 5684 THERMAL_SENSOR_ATTR_TEMP(3, 2), 5685 THERMAL_SENSOR_ATTR_TEMP(4, 3), 5686 THERMAL_SENSOR_ATTR_TEMP(5, 4), 5687 THERMAL_SENSOR_ATTR_TEMP(6, 5), 5688 THERMAL_SENSOR_ATTR_TEMP(7, 6), 5689 THERMAL_SENSOR_ATTR_TEMP(8, 7), 5690 THERMAL_SENSOR_ATTR_TEMP(9, 8), 5691 THERMAL_SENSOR_ATTR_TEMP(10, 9), 5692 THERMAL_SENSOR_ATTR_TEMP(11, 10), 5693 THERMAL_SENSOR_ATTR_TEMP(12, 11), 5694 THERMAL_SENSOR_ATTR_TEMP(13, 12), 5695 THERMAL_SENSOR_ATTR_TEMP(14, 13), 5696 THERMAL_SENSOR_ATTR_TEMP(15, 14), 5697 THERMAL_SENSOR_ATTR_TEMP(16, 15), 5698 }; 5699 5700 #define THERMAL_ATTRS(X) \ 5701 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 5702 5703 static struct attribute *thermal_temp_input_attr[] = { 5704 THERMAL_ATTRS(8), 5705 THERMAL_ATTRS(9), 5706 THERMAL_ATTRS(10), 5707 THERMAL_ATTRS(11), 5708 THERMAL_ATTRS(12), 5709 THERMAL_ATTRS(13), 5710 THERMAL_ATTRS(14), 5711 THERMAL_ATTRS(15), 5712 THERMAL_ATTRS(0), 5713 THERMAL_ATTRS(1), 5714 THERMAL_ATTRS(2), 5715 THERMAL_ATTRS(3), 5716 THERMAL_ATTRS(4), 5717 THERMAL_ATTRS(5), 5718 THERMAL_ATTRS(6), 5719 THERMAL_ATTRS(7), 5720 NULL 5721 }; 5722 5723 static const struct attribute_group thermal_temp_input16_group = { 5724 .attrs = thermal_temp_input_attr 5725 }; 5726 5727 static const struct attribute_group thermal_temp_input8_group = { 5728 .attrs = &thermal_temp_input_attr[8] 5729 }; 5730 5731 #undef THERMAL_SENSOR_ATTR_TEMP 5732 #undef THERMAL_ATTRS 5733 5734 /* --------------------------------------------------------------------- */ 5735 5736 static int __init thermal_init(struct ibm_init_struct *iibm) 5737 { 5738 u8 t, ta1, ta2; 5739 int i; 5740 int acpi_tmp7; 5741 int res; 5742 5743 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 5744 5745 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 5746 5747 if (thinkpad_id.ec_model) { 5748 /* 5749 * Direct EC access mode: sensors at registers 5750 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 5751 * non-implemented, thermal sensors return 0x80 when 5752 * not available 5753 */ 5754 5755 ta1 = ta2 = 0; 5756 for (i = 0; i < 8; i++) { 5757 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 5758 ta1 |= t; 5759 } else { 5760 ta1 = 0; 5761 break; 5762 } 5763 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 5764 ta2 |= t; 5765 } else { 5766 ta1 = 0; 5767 break; 5768 } 5769 } 5770 if (ta1 == 0) { 5771 /* This is sheer paranoia, but we handle it anyway */ 5772 if (acpi_tmp7) { 5773 printk(TPACPI_ERR 5774 "ThinkPad ACPI EC access misbehaving, " 5775 "falling back to ACPI TMPx access " 5776 "mode\n"); 5777 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5778 } else { 5779 printk(TPACPI_ERR 5780 "ThinkPad ACPI EC access misbehaving, " 5781 "disabling thermal sensors access\n"); 5782 thermal_read_mode = TPACPI_THERMAL_NONE; 5783 } 5784 } else { 5785 thermal_read_mode = 5786 (ta2 != 0) ? 5787 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 5788 } 5789 } else if (acpi_tmp7) { 5790 if (tpacpi_is_ibm() && 5791 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 5792 /* 600e/x, 770e, 770x */ 5793 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 5794 } else { 5795 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 5796 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5797 } 5798 } else { 5799 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 5800 thermal_read_mode = TPACPI_THERMAL_NONE; 5801 } 5802 5803 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 5804 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 5805 thermal_read_mode); 5806 5807 switch (thermal_read_mode) { 5808 case TPACPI_THERMAL_TPEC_16: 5809 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5810 &thermal_temp_input16_group); 5811 if (res) 5812 return res; 5813 break; 5814 case TPACPI_THERMAL_TPEC_8: 5815 case TPACPI_THERMAL_ACPI_TMP07: 5816 case TPACPI_THERMAL_ACPI_UPDT: 5817 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5818 &thermal_temp_input8_group); 5819 if (res) 5820 return res; 5821 break; 5822 case TPACPI_THERMAL_NONE: 5823 default: 5824 return 1; 5825 } 5826 5827 return 0; 5828 } 5829 5830 static void thermal_exit(void) 5831 { 5832 switch (thermal_read_mode) { 5833 case TPACPI_THERMAL_TPEC_16: 5834 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5835 &thermal_temp_input16_group); 5836 break; 5837 case TPACPI_THERMAL_TPEC_8: 5838 case TPACPI_THERMAL_ACPI_TMP07: 5839 case TPACPI_THERMAL_ACPI_UPDT: 5840 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5841 &thermal_temp_input8_group); 5842 break; 5843 case TPACPI_THERMAL_NONE: 5844 default: 5845 break; 5846 } 5847 } 5848 5849 static int thermal_read(struct seq_file *m) 5850 { 5851 int n, i; 5852 struct ibm_thermal_sensors_struct t; 5853 5854 n = thermal_get_sensors(&t); 5855 if (unlikely(n < 0)) 5856 return n; 5857 5858 seq_printf(m, "temperatures:\t"); 5859 5860 if (n > 0) { 5861 for (i = 0; i < (n - 1); i++) 5862 seq_printf(m, "%d ", t.temp[i] / 1000); 5863 seq_printf(m, "%d\n", t.temp[i] / 1000); 5864 } else 5865 seq_printf(m, "not supported\n"); 5866 5867 return 0; 5868 } 5869 5870 static struct ibm_struct thermal_driver_data = { 5871 .name = "thermal", 5872 .read = thermal_read, 5873 .exit = thermal_exit, 5874 }; 5875 5876 /************************************************************************* 5877 * Backlight/brightness subdriver 5878 */ 5879 5880 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 5881 5882 /* 5883 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 5884 * CMOS NVRAM byte 0x5E, bits 0-3. 5885 * 5886 * EC HBRV (0x31) has the following layout 5887 * Bit 7: unknown function 5888 * Bit 6: unknown function 5889 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 5890 * Bit 4: must be set to zero to avoid problems 5891 * Bit 3-0: backlight brightness level 5892 * 5893 * brightness_get_raw returns status data in the HBRV layout 5894 * 5895 * WARNING: The X61 has been verified to use HBRV for something else, so 5896 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 5897 * testing on the very early *60 Lenovo models... 5898 */ 5899 5900 enum { 5901 TP_EC_BACKLIGHT = 0x31, 5902 5903 /* TP_EC_BACKLIGHT bitmasks */ 5904 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 5905 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 5906 TP_EC_BACKLIGHT_MAPSW = 0x20, 5907 }; 5908 5909 enum tpacpi_brightness_access_mode { 5910 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 5911 TPACPI_BRGHT_MODE_EC, /* EC control */ 5912 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 5913 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 5914 TPACPI_BRGHT_MODE_MAX 5915 }; 5916 5917 static struct backlight_device *ibm_backlight_device; 5918 5919 static enum tpacpi_brightness_access_mode brightness_mode = 5920 TPACPI_BRGHT_MODE_MAX; 5921 5922 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 5923 5924 static struct mutex brightness_mutex; 5925 5926 /* NVRAM brightness access, 5927 * call with brightness_mutex held! */ 5928 static unsigned int tpacpi_brightness_nvram_get(void) 5929 { 5930 u8 lnvram; 5931 5932 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 5933 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5934 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 5935 lnvram &= bright_maxlvl; 5936 5937 return lnvram; 5938 } 5939 5940 static void tpacpi_brightness_checkpoint_nvram(void) 5941 { 5942 u8 lec = 0; 5943 u8 b_nvram; 5944 5945 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 5946 return; 5947 5948 vdbg_printk(TPACPI_DBG_BRGHT, 5949 "trying to checkpoint backlight level to NVRAM...\n"); 5950 5951 if (mutex_lock_killable(&brightness_mutex) < 0) 5952 return; 5953 5954 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5955 goto unlock; 5956 lec &= TP_EC_BACKLIGHT_LVLMSK; 5957 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 5958 5959 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5960 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 5961 /* NVRAM needs update */ 5962 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 5963 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 5964 b_nvram |= lec; 5965 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 5966 dbg_printk(TPACPI_DBG_BRGHT, 5967 "updated NVRAM backlight level to %u (0x%02x)\n", 5968 (unsigned int) lec, (unsigned int) b_nvram); 5969 } else 5970 vdbg_printk(TPACPI_DBG_BRGHT, 5971 "NVRAM backlight level already is %u (0x%02x)\n", 5972 (unsigned int) lec, (unsigned int) b_nvram); 5973 5974 unlock: 5975 mutex_unlock(&brightness_mutex); 5976 } 5977 5978 5979 /* call with brightness_mutex held! */ 5980 static int tpacpi_brightness_get_raw(int *status) 5981 { 5982 u8 lec = 0; 5983 5984 switch (brightness_mode) { 5985 case TPACPI_BRGHT_MODE_UCMS_STEP: 5986 *status = tpacpi_brightness_nvram_get(); 5987 return 0; 5988 case TPACPI_BRGHT_MODE_EC: 5989 case TPACPI_BRGHT_MODE_ECNVRAM: 5990 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5991 return -EIO; 5992 *status = lec; 5993 return 0; 5994 default: 5995 return -ENXIO; 5996 } 5997 } 5998 5999 /* call with brightness_mutex held! */ 6000 /* do NOT call with illegal backlight level value */ 6001 static int tpacpi_brightness_set_ec(unsigned int value) 6002 { 6003 u8 lec = 0; 6004 6005 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6006 return -EIO; 6007 6008 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6009 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6010 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6011 return -EIO; 6012 6013 return 0; 6014 } 6015 6016 /* call with brightness_mutex held! */ 6017 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6018 { 6019 int cmos_cmd, inc; 6020 unsigned int current_value, i; 6021 6022 current_value = tpacpi_brightness_nvram_get(); 6023 6024 if (value == current_value) 6025 return 0; 6026 6027 cmos_cmd = (value > current_value) ? 6028 TP_CMOS_BRIGHTNESS_UP : 6029 TP_CMOS_BRIGHTNESS_DOWN; 6030 inc = (value > current_value) ? 1 : -1; 6031 6032 for (i = current_value; i != value; i += inc) 6033 if (issue_thinkpad_cmos_command(cmos_cmd)) 6034 return -EIO; 6035 6036 return 0; 6037 } 6038 6039 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6040 static int brightness_set(unsigned int value) 6041 { 6042 int res; 6043 6044 if (value > bright_maxlvl || value < 0) 6045 return -EINVAL; 6046 6047 vdbg_printk(TPACPI_DBG_BRGHT, 6048 "set backlight level to %d\n", value); 6049 6050 res = mutex_lock_killable(&brightness_mutex); 6051 if (res < 0) 6052 return res; 6053 6054 switch (brightness_mode) { 6055 case TPACPI_BRGHT_MODE_EC: 6056 case TPACPI_BRGHT_MODE_ECNVRAM: 6057 res = tpacpi_brightness_set_ec(value); 6058 break; 6059 case TPACPI_BRGHT_MODE_UCMS_STEP: 6060 res = tpacpi_brightness_set_ucmsstep(value); 6061 break; 6062 default: 6063 res = -ENXIO; 6064 } 6065 6066 mutex_unlock(&brightness_mutex); 6067 return res; 6068 } 6069 6070 /* sysfs backlight class ----------------------------------------------- */ 6071 6072 static int brightness_update_status(struct backlight_device *bd) 6073 { 6074 unsigned int level = 6075 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6076 bd->props.power == FB_BLANK_UNBLANK) ? 6077 bd->props.brightness : 0; 6078 6079 dbg_printk(TPACPI_DBG_BRGHT, 6080 "backlight: attempt to set level to %d\n", 6081 level); 6082 6083 /* it is the backlight class's job (caller) to handle 6084 * EINTR and other errors properly */ 6085 return brightness_set(level); 6086 } 6087 6088 static int brightness_get(struct backlight_device *bd) 6089 { 6090 int status, res; 6091 6092 res = mutex_lock_killable(&brightness_mutex); 6093 if (res < 0) 6094 return 0; 6095 6096 res = tpacpi_brightness_get_raw(&status); 6097 6098 mutex_unlock(&brightness_mutex); 6099 6100 if (res < 0) 6101 return 0; 6102 6103 return status & TP_EC_BACKLIGHT_LVLMSK; 6104 } 6105 6106 static void tpacpi_brightness_notify_change(void) 6107 { 6108 backlight_force_update(ibm_backlight_device, 6109 BACKLIGHT_UPDATE_HOTKEY); 6110 } 6111 6112 static struct backlight_ops ibm_backlight_data = { 6113 .get_brightness = brightness_get, 6114 .update_status = brightness_update_status, 6115 }; 6116 6117 /* --------------------------------------------------------------------- */ 6118 6119 /* 6120 * Call _BCL method of video device. On some ThinkPads this will 6121 * switch the firmware to the ACPI brightness control mode. 6122 */ 6123 6124 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6125 { 6126 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6127 union acpi_object *obj; 6128 int rc; 6129 6130 if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) { 6131 obj = (union acpi_object *)buffer.pointer; 6132 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6133 printk(TPACPI_ERR "Unknown _BCL data, " 6134 "please report this to %s\n", TPACPI_MAIL); 6135 rc = 0; 6136 } else { 6137 rc = obj->package.count; 6138 } 6139 } else { 6140 return 0; 6141 } 6142 6143 kfree(buffer.pointer); 6144 return rc; 6145 } 6146 6147 6148 /* 6149 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6150 */ 6151 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6152 { 6153 acpi_handle video_device; 6154 int bcl_levels = 0; 6155 6156 tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device); 6157 if (video_device) 6158 bcl_levels = tpacpi_query_bcl_levels(video_device); 6159 6160 tp_features.bright_acpimode = (bcl_levels > 0); 6161 6162 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6163 } 6164 6165 /* 6166 * These are only useful for models that have only one possibility 6167 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6168 * these quirks. 6169 */ 6170 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6171 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6172 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6173 6174 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6175 /* Models with ATI GPUs known to require ECNVRAM mode */ 6176 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6177 6178 /* Models with ATI GPUs that can use ECNVRAM */ 6179 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6180 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6181 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6182 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6183 6184 /* Models with Intel Extreme Graphics 2 */ 6185 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6186 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6187 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6188 6189 /* Models with Intel GMA900 */ 6190 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6191 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6192 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6193 }; 6194 6195 /* 6196 * Returns < 0 for error, otherwise sets tp_features.bright_* 6197 * and bright_maxlvl. 6198 */ 6199 static void __init tpacpi_detect_brightness_capabilities(void) 6200 { 6201 unsigned int b; 6202 6203 vdbg_printk(TPACPI_DBG_INIT, 6204 "detecting firmware brightness interface capabilities\n"); 6205 6206 /* we could run a quirks check here (same table used by 6207 * brightness_init) if needed */ 6208 6209 /* 6210 * We always attempt to detect acpi support, so as to switch 6211 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6212 * going to publish a backlight interface 6213 */ 6214 b = tpacpi_check_std_acpi_brightness_support(); 6215 switch (b) { 6216 case 16: 6217 bright_maxlvl = 15; 6218 printk(TPACPI_INFO 6219 "detected a 16-level brightness capable ThinkPad\n"); 6220 break; 6221 case 8: 6222 case 0: 6223 bright_maxlvl = 7; 6224 printk(TPACPI_INFO 6225 "detected a 8-level brightness capable ThinkPad\n"); 6226 break; 6227 default: 6228 printk(TPACPI_ERR 6229 "Unsupported brightness interface, " 6230 "please contact %s\n", TPACPI_MAIL); 6231 tp_features.bright_unkfw = 1; 6232 bright_maxlvl = b - 1; 6233 } 6234 } 6235 6236 static int __init brightness_init(struct ibm_init_struct *iibm) 6237 { 6238 struct backlight_properties props; 6239 int b; 6240 unsigned long quirks; 6241 6242 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6243 6244 mutex_init(&brightness_mutex); 6245 6246 quirks = tpacpi_check_quirks(brightness_quirk_table, 6247 ARRAY_SIZE(brightness_quirk_table)); 6248 6249 /* tpacpi_detect_brightness_capabilities() must have run already */ 6250 6251 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6252 if (tp_features.bright_unkfw) 6253 return 1; 6254 6255 if (!brightness_enable) { 6256 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6257 "brightness support disabled by " 6258 "module parameter\n"); 6259 return 1; 6260 } 6261 6262 if (acpi_video_backlight_support()) { 6263 if (brightness_enable > 1) { 6264 printk(TPACPI_INFO 6265 "Standard ACPI backlight interface " 6266 "available, not loading native one.\n"); 6267 return 1; 6268 } else if (brightness_enable == 1) { 6269 printk(TPACPI_WARN 6270 "Cannot enable backlight brightness support, " 6271 "ACPI is already handling it. Refer to the " 6272 "acpi_backlight kernel parameter\n"); 6273 return 1; 6274 } 6275 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6276 printk(TPACPI_NOTICE 6277 "Standard ACPI backlight interface not " 6278 "available, thinkpad_acpi native " 6279 "brightness control enabled\n"); 6280 } 6281 6282 /* 6283 * Check for module parameter bogosity, note that we 6284 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6285 * able to detect "unspecified" 6286 */ 6287 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6288 return -EINVAL; 6289 6290 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6291 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6292 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6293 if (quirks & TPACPI_BRGHT_Q_EC) 6294 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6295 else 6296 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6297 6298 dbg_printk(TPACPI_DBG_BRGHT, 6299 "driver auto-selected brightness_mode=%d\n", 6300 brightness_mode); 6301 } 6302 6303 /* Safety */ 6304 if (!tpacpi_is_ibm() && 6305 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6306 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6307 return -EINVAL; 6308 6309 if (tpacpi_brightness_get_raw(&b) < 0) 6310 return 1; 6311 6312 memset(&props, 0, sizeof(struct backlight_properties)); 6313 props.max_brightness = bright_maxlvl; 6314 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6315 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6316 NULL, NULL, 6317 &ibm_backlight_data, 6318 &props); 6319 if (IS_ERR(ibm_backlight_device)) { 6320 int rc = PTR_ERR(ibm_backlight_device); 6321 ibm_backlight_device = NULL; 6322 printk(TPACPI_ERR "Could not register backlight device\n"); 6323 return rc; 6324 } 6325 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6326 "brightness is supported\n"); 6327 6328 if (quirks & TPACPI_BRGHT_Q_ASK) { 6329 printk(TPACPI_NOTICE 6330 "brightness: will use unverified default: " 6331 "brightness_mode=%d\n", brightness_mode); 6332 printk(TPACPI_NOTICE 6333 "brightness: please report to %s whether it works well " 6334 "or not on your ThinkPad\n", TPACPI_MAIL); 6335 } 6336 6337 /* Added by mistake in early 2007. Probably useless, but it could 6338 * be working around some unknown firmware problem where the value 6339 * read at startup doesn't match the real hardware state... so leave 6340 * it in place just in case */ 6341 backlight_update_status(ibm_backlight_device); 6342 6343 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6344 "brightness: registering brightness hotkeys " 6345 "as change notification\n"); 6346 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6347 | TP_ACPI_HKEY_BRGHTUP_MASK 6348 | TP_ACPI_HKEY_BRGHTDWN_MASK);; 6349 return 0; 6350 } 6351 6352 static void brightness_suspend(pm_message_t state) 6353 { 6354 tpacpi_brightness_checkpoint_nvram(); 6355 } 6356 6357 static void brightness_shutdown(void) 6358 { 6359 tpacpi_brightness_checkpoint_nvram(); 6360 } 6361 6362 static void brightness_exit(void) 6363 { 6364 if (ibm_backlight_device) { 6365 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6366 "calling backlight_device_unregister()\n"); 6367 backlight_device_unregister(ibm_backlight_device); 6368 } 6369 6370 tpacpi_brightness_checkpoint_nvram(); 6371 } 6372 6373 static int brightness_read(struct seq_file *m) 6374 { 6375 int level; 6376 6377 level = brightness_get(NULL); 6378 if (level < 0) { 6379 seq_printf(m, "level:\t\tunreadable\n"); 6380 } else { 6381 seq_printf(m, "level:\t\t%d\n", level); 6382 seq_printf(m, "commands:\tup, down\n"); 6383 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6384 bright_maxlvl); 6385 } 6386 6387 return 0; 6388 } 6389 6390 static int brightness_write(char *buf) 6391 { 6392 int level; 6393 int rc; 6394 char *cmd; 6395 6396 level = brightness_get(NULL); 6397 if (level < 0) 6398 return level; 6399 6400 while ((cmd = next_cmd(&buf))) { 6401 if (strlencmp(cmd, "up") == 0) { 6402 if (level < bright_maxlvl) 6403 level++; 6404 } else if (strlencmp(cmd, "down") == 0) { 6405 if (level > 0) 6406 level--; 6407 } else if (sscanf(cmd, "level %d", &level) == 1 && 6408 level >= 0 && level <= bright_maxlvl) { 6409 /* new level set */ 6410 } else 6411 return -EINVAL; 6412 } 6413 6414 tpacpi_disclose_usertask("procfs brightness", 6415 "set level to %d\n", level); 6416 6417 /* 6418 * Now we know what the final level should be, so we try to set it. 6419 * Doing it this way makes the syscall restartable in case of EINTR 6420 */ 6421 rc = brightness_set(level); 6422 if (!rc && ibm_backlight_device) 6423 backlight_force_update(ibm_backlight_device, 6424 BACKLIGHT_UPDATE_SYSFS); 6425 return (rc == -EINTR)? -ERESTARTSYS : rc; 6426 } 6427 6428 static struct ibm_struct brightness_driver_data = { 6429 .name = "brightness", 6430 .read = brightness_read, 6431 .write = brightness_write, 6432 .exit = brightness_exit, 6433 .suspend = brightness_suspend, 6434 .shutdown = brightness_shutdown, 6435 }; 6436 6437 /************************************************************************* 6438 * Volume subdriver 6439 */ 6440 6441 /* 6442 * IBM ThinkPads have a simple volume controller with MUTE gating. 6443 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 6444 * 6445 * Since the *61 series (and probably also the later *60 series), Lenovo 6446 * ThinkPads only implement the MUTE gate. 6447 * 6448 * EC register 0x30 6449 * Bit 6: MUTE (1 mutes sound) 6450 * Bit 3-0: Volume 6451 * Other bits should be zero as far as we know. 6452 * 6453 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 6454 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 6455 * such as bit 7 which is used to detect repeated presses of MUTE, 6456 * and we leave them unchanged. 6457 */ 6458 6459 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 6460 6461 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 6462 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 6463 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 6464 6465 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */ 6466 static char *alsa_id = "ThinkPadEC"; 6467 static int alsa_enable = SNDRV_DEFAULT_ENABLE1; 6468 6469 struct tpacpi_alsa_data { 6470 struct snd_card *card; 6471 struct snd_ctl_elem_id *ctl_mute_id; 6472 struct snd_ctl_elem_id *ctl_vol_id; 6473 }; 6474 6475 static struct snd_card *alsa_card; 6476 6477 enum { 6478 TP_EC_AUDIO = 0x30, 6479 6480 /* TP_EC_AUDIO bits */ 6481 TP_EC_AUDIO_MUTESW = 6, 6482 6483 /* TP_EC_AUDIO bitmasks */ 6484 TP_EC_AUDIO_LVL_MSK = 0x0F, 6485 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 6486 6487 /* Maximum volume */ 6488 TP_EC_VOLUME_MAX = 14, 6489 }; 6490 6491 enum tpacpi_volume_access_mode { 6492 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 6493 TPACPI_VOL_MODE_EC, /* Pure EC control */ 6494 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 6495 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6496 TPACPI_VOL_MODE_MAX 6497 }; 6498 6499 enum tpacpi_volume_capabilities { 6500 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 6501 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 6502 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 6503 TPACPI_VOL_CAP_MAX 6504 }; 6505 6506 static enum tpacpi_volume_access_mode volume_mode = 6507 TPACPI_VOL_MODE_MAX; 6508 6509 static enum tpacpi_volume_capabilities volume_capabilities; 6510 static int volume_control_allowed; 6511 6512 /* 6513 * Used to syncronize writers to TP_EC_AUDIO and 6514 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 6515 */ 6516 static struct mutex volume_mutex; 6517 6518 static void tpacpi_volume_checkpoint_nvram(void) 6519 { 6520 u8 lec = 0; 6521 u8 b_nvram; 6522 u8 ec_mask; 6523 6524 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 6525 return; 6526 if (!volume_control_allowed) 6527 return; 6528 6529 vdbg_printk(TPACPI_DBG_MIXER, 6530 "trying to checkpoint mixer state to NVRAM...\n"); 6531 6532 if (tp_features.mixer_no_level_control) 6533 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 6534 else 6535 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 6536 6537 if (mutex_lock_killable(&volume_mutex) < 0) 6538 return; 6539 6540 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 6541 goto unlock; 6542 lec &= ec_mask; 6543 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 6544 6545 if (lec != (b_nvram & ec_mask)) { 6546 /* NVRAM needs update */ 6547 b_nvram &= ~ec_mask; 6548 b_nvram |= lec; 6549 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 6550 dbg_printk(TPACPI_DBG_MIXER, 6551 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 6552 (unsigned int) lec, (unsigned int) b_nvram); 6553 } else { 6554 vdbg_printk(TPACPI_DBG_MIXER, 6555 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 6556 (unsigned int) lec, (unsigned int) b_nvram); 6557 } 6558 6559 unlock: 6560 mutex_unlock(&volume_mutex); 6561 } 6562 6563 static int volume_get_status_ec(u8 *status) 6564 { 6565 u8 s; 6566 6567 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 6568 return -EIO; 6569 6570 *status = s; 6571 6572 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 6573 6574 return 0; 6575 } 6576 6577 static int volume_get_status(u8 *status) 6578 { 6579 return volume_get_status_ec(status); 6580 } 6581 6582 static int volume_set_status_ec(const u8 status) 6583 { 6584 if (!acpi_ec_write(TP_EC_AUDIO, status)) 6585 return -EIO; 6586 6587 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 6588 6589 return 0; 6590 } 6591 6592 static int volume_set_status(const u8 status) 6593 { 6594 return volume_set_status_ec(status); 6595 } 6596 6597 /* returns < 0 on error, 0 on no change, 1 on change */ 6598 static int __volume_set_mute_ec(const bool mute) 6599 { 6600 int rc; 6601 u8 s, n; 6602 6603 if (mutex_lock_killable(&volume_mutex) < 0) 6604 return -EINTR; 6605 6606 rc = volume_get_status_ec(&s); 6607 if (rc) 6608 goto unlock; 6609 6610 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 6611 s & ~TP_EC_AUDIO_MUTESW_MSK; 6612 6613 if (n != s) { 6614 rc = volume_set_status_ec(n); 6615 if (!rc) 6616 rc = 1; 6617 } 6618 6619 unlock: 6620 mutex_unlock(&volume_mutex); 6621 return rc; 6622 } 6623 6624 static int volume_alsa_set_mute(const bool mute) 6625 { 6626 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 6627 (mute) ? "" : "un"); 6628 return __volume_set_mute_ec(mute); 6629 } 6630 6631 static int volume_set_mute(const bool mute) 6632 { 6633 int rc; 6634 6635 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 6636 (mute) ? "" : "un"); 6637 6638 rc = __volume_set_mute_ec(mute); 6639 return (rc < 0) ? rc : 0; 6640 } 6641 6642 /* returns < 0 on error, 0 on no change, 1 on change */ 6643 static int __volume_set_volume_ec(const u8 vol) 6644 { 6645 int rc; 6646 u8 s, n; 6647 6648 if (vol > TP_EC_VOLUME_MAX) 6649 return -EINVAL; 6650 6651 if (mutex_lock_killable(&volume_mutex) < 0) 6652 return -EINTR; 6653 6654 rc = volume_get_status_ec(&s); 6655 if (rc) 6656 goto unlock; 6657 6658 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 6659 6660 if (n != s) { 6661 rc = volume_set_status_ec(n); 6662 if (!rc) 6663 rc = 1; 6664 } 6665 6666 unlock: 6667 mutex_unlock(&volume_mutex); 6668 return rc; 6669 } 6670 6671 static int volume_alsa_set_volume(const u8 vol) 6672 { 6673 dbg_printk(TPACPI_DBG_MIXER, 6674 "ALSA: trying to set volume level to %hu\n", vol); 6675 return __volume_set_volume_ec(vol); 6676 } 6677 6678 static void volume_alsa_notify_change(void) 6679 { 6680 struct tpacpi_alsa_data *d; 6681 6682 if (alsa_card && alsa_card->private_data) { 6683 d = alsa_card->private_data; 6684 if (d->ctl_mute_id) 6685 snd_ctl_notify(alsa_card, 6686 SNDRV_CTL_EVENT_MASK_VALUE, 6687 d->ctl_mute_id); 6688 if (d->ctl_vol_id) 6689 snd_ctl_notify(alsa_card, 6690 SNDRV_CTL_EVENT_MASK_VALUE, 6691 d->ctl_vol_id); 6692 } 6693 } 6694 6695 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 6696 struct snd_ctl_elem_info *uinfo) 6697 { 6698 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 6699 uinfo->count = 1; 6700 uinfo->value.integer.min = 0; 6701 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 6702 return 0; 6703 } 6704 6705 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 6706 struct snd_ctl_elem_value *ucontrol) 6707 { 6708 u8 s; 6709 int rc; 6710 6711 rc = volume_get_status(&s); 6712 if (rc < 0) 6713 return rc; 6714 6715 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 6716 return 0; 6717 } 6718 6719 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 6720 struct snd_ctl_elem_value *ucontrol) 6721 { 6722 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 6723 ucontrol->value.integer.value[0]); 6724 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 6725 } 6726 6727 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 6728 6729 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 6730 struct snd_ctl_elem_value *ucontrol) 6731 { 6732 u8 s; 6733 int rc; 6734 6735 rc = volume_get_status(&s); 6736 if (rc < 0) 6737 return rc; 6738 6739 ucontrol->value.integer.value[0] = 6740 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 6741 return 0; 6742 } 6743 6744 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 6745 struct snd_ctl_elem_value *ucontrol) 6746 { 6747 tpacpi_disclose_usertask("ALSA", "%smute\n", 6748 ucontrol->value.integer.value[0] ? 6749 "un" : ""); 6750 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 6751 } 6752 6753 static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = { 6754 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6755 .name = "Console Playback Volume", 6756 .index = 0, 6757 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6758 .info = volume_alsa_vol_info, 6759 .get = volume_alsa_vol_get, 6760 }; 6761 6762 static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = { 6763 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6764 .name = "Console Playback Switch", 6765 .index = 0, 6766 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6767 .info = volume_alsa_mute_info, 6768 .get = volume_alsa_mute_get, 6769 }; 6770 6771 static void volume_suspend(pm_message_t state) 6772 { 6773 tpacpi_volume_checkpoint_nvram(); 6774 } 6775 6776 static void volume_resume(void) 6777 { 6778 volume_alsa_notify_change(); 6779 } 6780 6781 static void volume_shutdown(void) 6782 { 6783 tpacpi_volume_checkpoint_nvram(); 6784 } 6785 6786 static void volume_exit(void) 6787 { 6788 if (alsa_card) { 6789 snd_card_free(alsa_card); 6790 alsa_card = NULL; 6791 } 6792 6793 tpacpi_volume_checkpoint_nvram(); 6794 } 6795 6796 static int __init volume_create_alsa_mixer(void) 6797 { 6798 struct snd_card *card; 6799 struct tpacpi_alsa_data *data; 6800 struct snd_kcontrol *ctl_vol; 6801 struct snd_kcontrol *ctl_mute; 6802 int rc; 6803 6804 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE, 6805 sizeof(struct tpacpi_alsa_data), &card); 6806 if (rc < 0 || !card) { 6807 printk(TPACPI_ERR 6808 "Failed to create ALSA card structures: %d\n", rc); 6809 return 1; 6810 } 6811 6812 BUG_ON(!card->private_data); 6813 data = card->private_data; 6814 data->card = card; 6815 6816 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 6817 sizeof(card->driver)); 6818 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 6819 sizeof(card->shortname)); 6820 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 6821 (thinkpad_id.ec_version_str) ? 6822 thinkpad_id.ec_version_str : "(unknown)"); 6823 snprintf(card->longname, sizeof(card->longname), 6824 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 6825 (thinkpad_id.ec_version_str) ? 6826 thinkpad_id.ec_version_str : "unknown"); 6827 6828 if (volume_control_allowed) { 6829 volume_alsa_control_vol.put = volume_alsa_vol_put; 6830 volume_alsa_control_vol.access = 6831 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6832 6833 volume_alsa_control_mute.put = volume_alsa_mute_put; 6834 volume_alsa_control_mute.access = 6835 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6836 } 6837 6838 if (!tp_features.mixer_no_level_control) { 6839 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 6840 rc = snd_ctl_add(card, ctl_vol); 6841 if (rc < 0) { 6842 printk(TPACPI_ERR 6843 "Failed to create ALSA volume control: %d\n", 6844 rc); 6845 goto err_exit; 6846 } 6847 data->ctl_vol_id = &ctl_vol->id; 6848 } 6849 6850 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 6851 rc = snd_ctl_add(card, ctl_mute); 6852 if (rc < 0) { 6853 printk(TPACPI_ERR "Failed to create ALSA mute control: %d\n", 6854 rc); 6855 goto err_exit; 6856 } 6857 data->ctl_mute_id = &ctl_mute->id; 6858 6859 snd_card_set_dev(card, &tpacpi_pdev->dev); 6860 rc = snd_card_register(card); 6861 if (rc < 0) { 6862 printk(TPACPI_ERR "Failed to register ALSA card: %d\n", rc); 6863 goto err_exit; 6864 } 6865 6866 alsa_card = card; 6867 return 0; 6868 6869 err_exit: 6870 snd_card_free(card); 6871 return 1; 6872 } 6873 6874 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 6875 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 6876 6877 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 6878 /* Whitelist volume level on all IBM by default */ 6879 { .vendor = PCI_VENDOR_ID_IBM, 6880 .bios = TPACPI_MATCH_ANY, 6881 .ec = TPACPI_MATCH_ANY, 6882 .quirks = TPACPI_VOL_Q_LEVEL }, 6883 6884 /* Lenovo models with volume control (needs confirmation) */ 6885 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 6886 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 6887 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 6888 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 6889 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 6890 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 6891 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 6892 6893 /* Whitelist mute-only on all Lenovo by default */ 6894 { .vendor = PCI_VENDOR_ID_LENOVO, 6895 .bios = TPACPI_MATCH_ANY, 6896 .ec = TPACPI_MATCH_ANY, 6897 .quirks = TPACPI_VOL_Q_MUTEONLY } 6898 }; 6899 6900 static int __init volume_init(struct ibm_init_struct *iibm) 6901 { 6902 unsigned long quirks; 6903 int rc; 6904 6905 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 6906 6907 mutex_init(&volume_mutex); 6908 6909 /* 6910 * Check for module parameter bogosity, note that we 6911 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 6912 * able to detect "unspecified" 6913 */ 6914 if (volume_mode > TPACPI_VOL_MODE_MAX) 6915 return -EINVAL; 6916 6917 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 6918 printk(TPACPI_ERR 6919 "UCMS step volume mode not implemented, " 6920 "please contact %s\n", TPACPI_MAIL); 6921 return 1; 6922 } 6923 6924 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 6925 return -EINVAL; 6926 6927 /* 6928 * The ALSA mixer is our primary interface. 6929 * When disabled, don't install the subdriver at all 6930 */ 6931 if (!alsa_enable) { 6932 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6933 "ALSA mixer disabled by parameter, " 6934 "not loading volume subdriver...\n"); 6935 return 1; 6936 } 6937 6938 quirks = tpacpi_check_quirks(volume_quirk_table, 6939 ARRAY_SIZE(volume_quirk_table)); 6940 6941 switch (volume_capabilities) { 6942 case TPACPI_VOL_CAP_AUTO: 6943 if (quirks & TPACPI_VOL_Q_MUTEONLY) 6944 tp_features.mixer_no_level_control = 1; 6945 else if (quirks & TPACPI_VOL_Q_LEVEL) 6946 tp_features.mixer_no_level_control = 0; 6947 else 6948 return 1; /* no mixer */ 6949 break; 6950 case TPACPI_VOL_CAP_VOLMUTE: 6951 tp_features.mixer_no_level_control = 0; 6952 break; 6953 case TPACPI_VOL_CAP_MUTEONLY: 6954 tp_features.mixer_no_level_control = 1; 6955 break; 6956 default: 6957 return 1; 6958 } 6959 6960 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 6961 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6962 "using user-supplied volume_capabilities=%d\n", 6963 volume_capabilities); 6964 6965 if (volume_mode == TPACPI_VOL_MODE_AUTO || 6966 volume_mode == TPACPI_VOL_MODE_MAX) { 6967 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 6968 6969 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6970 "driver auto-selected volume_mode=%d\n", 6971 volume_mode); 6972 } else { 6973 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6974 "using user-supplied volume_mode=%d\n", 6975 volume_mode); 6976 } 6977 6978 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6979 "mute is supported, volume control is %s\n", 6980 str_supported(!tp_features.mixer_no_level_control)); 6981 6982 rc = volume_create_alsa_mixer(); 6983 if (rc) { 6984 printk(TPACPI_ERR 6985 "Could not create the ALSA mixer interface\n"); 6986 return rc; 6987 } 6988 6989 printk(TPACPI_INFO 6990 "Console audio control enabled, mode: %s\n", 6991 (volume_control_allowed) ? 6992 "override (read/write)" : 6993 "monitor (read only)"); 6994 6995 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6996 "registering volume hotkeys as change notification\n"); 6997 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6998 | TP_ACPI_HKEY_VOLUP_MASK 6999 | TP_ACPI_HKEY_VOLDWN_MASK 7000 | TP_ACPI_HKEY_MUTE_MASK); 7001 7002 return 0; 7003 } 7004 7005 static int volume_read(struct seq_file *m) 7006 { 7007 u8 status; 7008 7009 if (volume_get_status(&status) < 0) { 7010 seq_printf(m, "level:\t\tunreadable\n"); 7011 } else { 7012 if (tp_features.mixer_no_level_control) 7013 seq_printf(m, "level:\t\tunsupported\n"); 7014 else 7015 seq_printf(m, "level:\t\t%d\n", 7016 status & TP_EC_AUDIO_LVL_MSK); 7017 7018 seq_printf(m, "mute:\t\t%s\n", 7019 onoff(status, TP_EC_AUDIO_MUTESW)); 7020 7021 if (volume_control_allowed) { 7022 seq_printf(m, "commands:\tunmute, mute\n"); 7023 if (!tp_features.mixer_no_level_control) { 7024 seq_printf(m, 7025 "commands:\tup, down\n"); 7026 seq_printf(m, 7027 "commands:\tlevel <level>" 7028 " (<level> is 0-%d)\n", 7029 TP_EC_VOLUME_MAX); 7030 } 7031 } 7032 } 7033 7034 return 0; 7035 } 7036 7037 static int volume_write(char *buf) 7038 { 7039 u8 s; 7040 u8 new_level, new_mute; 7041 int l; 7042 char *cmd; 7043 int rc; 7044 7045 /* 7046 * We do allow volume control at driver startup, so that the 7047 * user can set initial state through the volume=... parameter hack. 7048 */ 7049 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7050 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7051 tp_warned.volume_ctrl_forbidden = 1; 7052 printk(TPACPI_NOTICE 7053 "Console audio control in monitor mode, " 7054 "changes are not allowed.\n"); 7055 printk(TPACPI_NOTICE 7056 "Use the volume_control=1 module parameter " 7057 "to enable volume control\n"); 7058 } 7059 return -EPERM; 7060 } 7061 7062 rc = volume_get_status(&s); 7063 if (rc < 0) 7064 return rc; 7065 7066 new_level = s & TP_EC_AUDIO_LVL_MSK; 7067 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7068 7069 while ((cmd = next_cmd(&buf))) { 7070 if (!tp_features.mixer_no_level_control) { 7071 if (strlencmp(cmd, "up") == 0) { 7072 if (new_mute) 7073 new_mute = 0; 7074 else if (new_level < TP_EC_VOLUME_MAX) 7075 new_level++; 7076 continue; 7077 } else if (strlencmp(cmd, "down") == 0) { 7078 if (new_mute) 7079 new_mute = 0; 7080 else if (new_level > 0) 7081 new_level--; 7082 continue; 7083 } else if (sscanf(cmd, "level %u", &l) == 1 && 7084 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7085 new_level = l; 7086 continue; 7087 } 7088 } 7089 if (strlencmp(cmd, "mute") == 0) 7090 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7091 else if (strlencmp(cmd, "unmute") == 0) 7092 new_mute = 0; 7093 else 7094 return -EINVAL; 7095 } 7096 7097 if (tp_features.mixer_no_level_control) { 7098 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7099 new_mute ? "" : "un"); 7100 rc = volume_set_mute(!!new_mute); 7101 } else { 7102 tpacpi_disclose_usertask("procfs volume", 7103 "%smute and set level to %d\n", 7104 new_mute ? "" : "un", new_level); 7105 rc = volume_set_status(new_mute | new_level); 7106 } 7107 volume_alsa_notify_change(); 7108 7109 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7110 } 7111 7112 static struct ibm_struct volume_driver_data = { 7113 .name = "volume", 7114 .read = volume_read, 7115 .write = volume_write, 7116 .exit = volume_exit, 7117 .suspend = volume_suspend, 7118 .resume = volume_resume, 7119 .shutdown = volume_shutdown, 7120 }; 7121 7122 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7123 7124 #define alsa_card NULL 7125 7126 static void inline volume_alsa_notify_change(void) 7127 { 7128 } 7129 7130 static int __init volume_init(struct ibm_init_struct *iibm) 7131 { 7132 printk(TPACPI_INFO 7133 "volume: disabled as there is no ALSA support in this kernel\n"); 7134 7135 return 1; 7136 } 7137 7138 static struct ibm_struct volume_driver_data = { 7139 .name = "volume", 7140 }; 7141 7142 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7143 7144 /************************************************************************* 7145 * Fan subdriver 7146 */ 7147 7148 /* 7149 * FAN ACCESS MODES 7150 * 7151 * TPACPI_FAN_RD_ACPI_GFAN: 7152 * ACPI GFAN method: returns fan level 7153 * 7154 * see TPACPI_FAN_WR_ACPI_SFAN 7155 * EC 0x2f (HFSP) not available if GFAN exists 7156 * 7157 * TPACPI_FAN_WR_ACPI_SFAN: 7158 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7159 * 7160 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7161 * it for writing. 7162 * 7163 * TPACPI_FAN_WR_TPEC: 7164 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7165 * Supported on almost all ThinkPads 7166 * 7167 * Fan speed changes of any sort (including those caused by the 7168 * disengaged mode) are usually done slowly by the firmware as the 7169 * maximum amount of fan duty cycle change per second seems to be 7170 * limited. 7171 * 7172 * Reading is not available if GFAN exists. 7173 * Writing is not available if SFAN exists. 7174 * 7175 * Bits 7176 * 7 automatic mode engaged; 7177 * (default operation mode of the ThinkPad) 7178 * fan level is ignored in this mode. 7179 * 6 full speed mode (takes precedence over bit 7); 7180 * not available on all thinkpads. May disable 7181 * the tachometer while the fan controller ramps up 7182 * the speed (which can take up to a few *minutes*). 7183 * Speeds up fan to 100% duty-cycle, which is far above 7184 * the standard RPM levels. It is not impossible that 7185 * it could cause hardware damage. 7186 * 5-3 unused in some models. Extra bits for fan level 7187 * in others, but still useless as all values above 7188 * 7 map to the same speed as level 7 in these models. 7189 * 2-0 fan level (0..7 usually) 7190 * 0x00 = stop 7191 * 0x07 = max (set when temperatures critical) 7192 * Some ThinkPads may have other levels, see 7193 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7194 * 7195 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7196 * boot. Apparently the EC does not intialize it, so unless ACPI DSDT 7197 * does so, its initial value is meaningless (0x07). 7198 * 7199 * For firmware bugs, refer to: 7200 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7201 * 7202 * ---- 7203 * 7204 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7205 * Main fan tachometer reading (in RPM) 7206 * 7207 * This register is present on all ThinkPads with a new-style EC, and 7208 * it is known not to be present on the A21m/e, and T22, as there is 7209 * something else in offset 0x84 according to the ACPI DSDT. Other 7210 * ThinkPads from this same time period (and earlier) probably lack the 7211 * tachometer as well. 7212 * 7213 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7214 * was never fixed by IBM to report the EC firmware version string 7215 * probably support the tachometer (like the early X models), so 7216 * detecting it is quite hard. We need more data to know for sure. 7217 * 7218 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7219 * might result. 7220 * 7221 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7222 * mode. 7223 * 7224 * For firmware bugs, refer to: 7225 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7226 * 7227 * ---- 7228 * 7229 * ThinkPad EC register 0x31 bit 0 (only on select models) 7230 * 7231 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7232 * show the speed of the main fan. When bit 0 of EC register 0x31 7233 * is one, the tachometer registers show the speed of the auxiliary 7234 * fan. 7235 * 7236 * Fan control seems to affect both fans, regardless of the state 7237 * of this bit. 7238 * 7239 * So far, only the firmware for the X60/X61 non-tablet versions 7240 * seem to support this (firmware TP-7M). 7241 * 7242 * TPACPI_FAN_WR_ACPI_FANS: 7243 * ThinkPad X31, X40, X41. Not available in the X60. 7244 * 7245 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7246 * high speed. ACPI DSDT seems to map these three speeds to levels 7247 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7248 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7249 * 7250 * The speeds are stored on handles 7251 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7252 * 7253 * There are three default speed sets, accessible as handles: 7254 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7255 * 7256 * ACPI DSDT switches which set is in use depending on various 7257 * factors. 7258 * 7259 * TPACPI_FAN_WR_TPEC is also available and should be used to 7260 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7261 * but the ACPI tables just mention level 7. 7262 */ 7263 7264 enum { /* Fan control constants */ 7265 fan_status_offset = 0x2f, /* EC register 0x2f */ 7266 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7267 * 0x84 must be read before 0x85 */ 7268 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7269 bit 0 selects which fan is active */ 7270 7271 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7272 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7273 7274 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7275 }; 7276 7277 enum fan_status_access_mode { 7278 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7279 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7280 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7281 }; 7282 7283 enum fan_control_access_mode { 7284 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7285 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7286 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7287 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7288 }; 7289 7290 enum fan_control_commands { 7291 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7292 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7293 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7294 * and also watchdog cmd */ 7295 }; 7296 7297 static int fan_control_allowed; 7298 7299 static enum fan_status_access_mode fan_status_access_mode; 7300 static enum fan_control_access_mode fan_control_access_mode; 7301 static enum fan_control_commands fan_control_commands; 7302 7303 static u8 fan_control_initial_status; 7304 static u8 fan_control_desired_level; 7305 static u8 fan_control_resume_level; 7306 static int fan_watchdog_maxinterval; 7307 7308 static struct mutex fan_mutex; 7309 7310 static void fan_watchdog_fire(struct work_struct *ignored); 7311 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7312 7313 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7314 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7315 "\\FSPD", /* 600e/x, 770e, 770x */ 7316 ); /* all others */ 7317 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7318 "JFNS", /* 770x-JL */ 7319 ); /* all others */ 7320 7321 /* 7322 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7323 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7324 * be in auto mode (0x80). 7325 * 7326 * This is corrected by any write to HFSP either by the driver, or 7327 * by the firmware. 7328 * 7329 * We assume 0x07 really means auto mode while this quirk is active, 7330 * as this is far more likely than the ThinkPad being in level 7, 7331 * which is only used by the firmware during thermal emergencies. 7332 * 7333 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7334 * TP-70 (T43, R52), which are known to be buggy. 7335 */ 7336 7337 static void fan_quirk1_setup(void) 7338 { 7339 if (fan_control_initial_status == 0x07) { 7340 printk(TPACPI_NOTICE 7341 "fan_init: initial fan status is unknown, " 7342 "assuming it is in auto mode\n"); 7343 tp_features.fan_ctrl_status_undef = 1; 7344 } 7345 } 7346 7347 static void fan_quirk1_handle(u8 *fan_status) 7348 { 7349 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7350 if (*fan_status != fan_control_initial_status) { 7351 /* something changed the HFSP regisnter since 7352 * driver init time, so it is not undefined 7353 * anymore */ 7354 tp_features.fan_ctrl_status_undef = 0; 7355 } else { 7356 /* Return most likely status. In fact, it 7357 * might be the only possible status */ 7358 *fan_status = TP_EC_FAN_AUTO; 7359 } 7360 } 7361 } 7362 7363 /* Select main fan on X60/X61, NOOP on others */ 7364 static bool fan_select_fan1(void) 7365 { 7366 if (tp_features.second_fan) { 7367 u8 val; 7368 7369 if (ec_read(fan_select_offset, &val) < 0) 7370 return false; 7371 val &= 0xFEU; 7372 if (ec_write(fan_select_offset, val) < 0) 7373 return false; 7374 } 7375 return true; 7376 } 7377 7378 /* Select secondary fan on X60/X61 */ 7379 static bool fan_select_fan2(void) 7380 { 7381 u8 val; 7382 7383 if (!tp_features.second_fan) 7384 return false; 7385 7386 if (ec_read(fan_select_offset, &val) < 0) 7387 return false; 7388 val |= 0x01U; 7389 if (ec_write(fan_select_offset, val) < 0) 7390 return false; 7391 7392 return true; 7393 } 7394 7395 /* 7396 * Call with fan_mutex held 7397 */ 7398 static void fan_update_desired_level(u8 status) 7399 { 7400 if ((status & 7401 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7402 if (status > 7) 7403 fan_control_desired_level = 7; 7404 else 7405 fan_control_desired_level = status; 7406 } 7407 } 7408 7409 static int fan_get_status(u8 *status) 7410 { 7411 u8 s; 7412 7413 /* TODO: 7414 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 7415 7416 switch (fan_status_access_mode) { 7417 case TPACPI_FAN_RD_ACPI_GFAN: 7418 /* 570, 600e/x, 770e, 770x */ 7419 7420 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d"))) 7421 return -EIO; 7422 7423 if (likely(status)) 7424 *status = s & 0x07; 7425 7426 break; 7427 7428 case TPACPI_FAN_RD_TPEC: 7429 /* all except 570, 600e/x, 770e, 770x */ 7430 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 7431 return -EIO; 7432 7433 if (likely(status)) { 7434 *status = s; 7435 fan_quirk1_handle(status); 7436 } 7437 7438 break; 7439 7440 default: 7441 return -ENXIO; 7442 } 7443 7444 return 0; 7445 } 7446 7447 static int fan_get_status_safe(u8 *status) 7448 { 7449 int rc; 7450 u8 s; 7451 7452 if (mutex_lock_killable(&fan_mutex)) 7453 return -ERESTARTSYS; 7454 rc = fan_get_status(&s); 7455 if (!rc) 7456 fan_update_desired_level(s); 7457 mutex_unlock(&fan_mutex); 7458 7459 if (status) 7460 *status = s; 7461 7462 return rc; 7463 } 7464 7465 static int fan_get_speed(unsigned int *speed) 7466 { 7467 u8 hi, lo; 7468 7469 switch (fan_status_access_mode) { 7470 case TPACPI_FAN_RD_TPEC: 7471 /* all except 570, 600e/x, 770e, 770x */ 7472 if (unlikely(!fan_select_fan1())) 7473 return -EIO; 7474 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 7475 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 7476 return -EIO; 7477 7478 if (likely(speed)) 7479 *speed = (hi << 8) | lo; 7480 7481 break; 7482 7483 default: 7484 return -ENXIO; 7485 } 7486 7487 return 0; 7488 } 7489 7490 static int fan2_get_speed(unsigned int *speed) 7491 { 7492 u8 hi, lo; 7493 bool rc; 7494 7495 switch (fan_status_access_mode) { 7496 case TPACPI_FAN_RD_TPEC: 7497 /* all except 570, 600e/x, 770e, 770x */ 7498 if (unlikely(!fan_select_fan2())) 7499 return -EIO; 7500 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 7501 !acpi_ec_read(fan_rpm_offset + 1, &hi); 7502 fan_select_fan1(); /* play it safe */ 7503 if (rc) 7504 return -EIO; 7505 7506 if (likely(speed)) 7507 *speed = (hi << 8) | lo; 7508 7509 break; 7510 7511 default: 7512 return -ENXIO; 7513 } 7514 7515 return 0; 7516 } 7517 7518 static int fan_set_level(int level) 7519 { 7520 if (!fan_control_allowed) 7521 return -EPERM; 7522 7523 switch (fan_control_access_mode) { 7524 case TPACPI_FAN_WR_ACPI_SFAN: 7525 if (level >= 0 && level <= 7) { 7526 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 7527 return -EIO; 7528 } else 7529 return -EINVAL; 7530 break; 7531 7532 case TPACPI_FAN_WR_ACPI_FANS: 7533 case TPACPI_FAN_WR_TPEC: 7534 if (!(level & TP_EC_FAN_AUTO) && 7535 !(level & TP_EC_FAN_FULLSPEED) && 7536 ((level < 0) || (level > 7))) 7537 return -EINVAL; 7538 7539 /* safety net should the EC not support AUTO 7540 * or FULLSPEED mode bits and just ignore them */ 7541 if (level & TP_EC_FAN_FULLSPEED) 7542 level |= 7; /* safety min speed 7 */ 7543 else if (level & TP_EC_FAN_AUTO) 7544 level |= 4; /* safety min speed 4 */ 7545 7546 if (!acpi_ec_write(fan_status_offset, level)) 7547 return -EIO; 7548 else 7549 tp_features.fan_ctrl_status_undef = 0; 7550 break; 7551 7552 default: 7553 return -ENXIO; 7554 } 7555 7556 vdbg_printk(TPACPI_DBG_FAN, 7557 "fan control: set fan control register to 0x%02x\n", level); 7558 return 0; 7559 } 7560 7561 static int fan_set_level_safe(int level) 7562 { 7563 int rc; 7564 7565 if (!fan_control_allowed) 7566 return -EPERM; 7567 7568 if (mutex_lock_killable(&fan_mutex)) 7569 return -ERESTARTSYS; 7570 7571 if (level == TPACPI_FAN_LAST_LEVEL) 7572 level = fan_control_desired_level; 7573 7574 rc = fan_set_level(level); 7575 if (!rc) 7576 fan_update_desired_level(level); 7577 7578 mutex_unlock(&fan_mutex); 7579 return rc; 7580 } 7581 7582 static int fan_set_enable(void) 7583 { 7584 u8 s; 7585 int rc; 7586 7587 if (!fan_control_allowed) 7588 return -EPERM; 7589 7590 if (mutex_lock_killable(&fan_mutex)) 7591 return -ERESTARTSYS; 7592 7593 switch (fan_control_access_mode) { 7594 case TPACPI_FAN_WR_ACPI_FANS: 7595 case TPACPI_FAN_WR_TPEC: 7596 rc = fan_get_status(&s); 7597 if (rc < 0) 7598 break; 7599 7600 /* Don't go out of emergency fan mode */ 7601 if (s != 7) { 7602 s &= 0x07; 7603 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 7604 } 7605 7606 if (!acpi_ec_write(fan_status_offset, s)) 7607 rc = -EIO; 7608 else { 7609 tp_features.fan_ctrl_status_undef = 0; 7610 rc = 0; 7611 } 7612 break; 7613 7614 case TPACPI_FAN_WR_ACPI_SFAN: 7615 rc = fan_get_status(&s); 7616 if (rc < 0) 7617 break; 7618 7619 s &= 0x07; 7620 7621 /* Set fan to at least level 4 */ 7622 s |= 4; 7623 7624 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 7625 rc = -EIO; 7626 else 7627 rc = 0; 7628 break; 7629 7630 default: 7631 rc = -ENXIO; 7632 } 7633 7634 mutex_unlock(&fan_mutex); 7635 7636 if (!rc) 7637 vdbg_printk(TPACPI_DBG_FAN, 7638 "fan control: set fan control register to 0x%02x\n", 7639 s); 7640 return rc; 7641 } 7642 7643 static int fan_set_disable(void) 7644 { 7645 int rc; 7646 7647 if (!fan_control_allowed) 7648 return -EPERM; 7649 7650 if (mutex_lock_killable(&fan_mutex)) 7651 return -ERESTARTSYS; 7652 7653 rc = 0; 7654 switch (fan_control_access_mode) { 7655 case TPACPI_FAN_WR_ACPI_FANS: 7656 case TPACPI_FAN_WR_TPEC: 7657 if (!acpi_ec_write(fan_status_offset, 0x00)) 7658 rc = -EIO; 7659 else { 7660 fan_control_desired_level = 0; 7661 tp_features.fan_ctrl_status_undef = 0; 7662 } 7663 break; 7664 7665 case TPACPI_FAN_WR_ACPI_SFAN: 7666 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 7667 rc = -EIO; 7668 else 7669 fan_control_desired_level = 0; 7670 break; 7671 7672 default: 7673 rc = -ENXIO; 7674 } 7675 7676 if (!rc) 7677 vdbg_printk(TPACPI_DBG_FAN, 7678 "fan control: set fan control register to 0\n"); 7679 7680 mutex_unlock(&fan_mutex); 7681 return rc; 7682 } 7683 7684 static int fan_set_speed(int speed) 7685 { 7686 int rc; 7687 7688 if (!fan_control_allowed) 7689 return -EPERM; 7690 7691 if (mutex_lock_killable(&fan_mutex)) 7692 return -ERESTARTSYS; 7693 7694 rc = 0; 7695 switch (fan_control_access_mode) { 7696 case TPACPI_FAN_WR_ACPI_FANS: 7697 if (speed >= 0 && speed <= 65535) { 7698 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 7699 speed, speed, speed)) 7700 rc = -EIO; 7701 } else 7702 rc = -EINVAL; 7703 break; 7704 7705 default: 7706 rc = -ENXIO; 7707 } 7708 7709 mutex_unlock(&fan_mutex); 7710 return rc; 7711 } 7712 7713 static void fan_watchdog_reset(void) 7714 { 7715 static int fan_watchdog_active; 7716 7717 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 7718 return; 7719 7720 if (fan_watchdog_active) 7721 cancel_delayed_work(&fan_watchdog_task); 7722 7723 if (fan_watchdog_maxinterval > 0 && 7724 tpacpi_lifecycle != TPACPI_LIFE_EXITING) { 7725 fan_watchdog_active = 1; 7726 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task, 7727 msecs_to_jiffies(fan_watchdog_maxinterval 7728 * 1000))) { 7729 printk(TPACPI_ERR 7730 "failed to queue the fan watchdog, " 7731 "watchdog will not trigger\n"); 7732 } 7733 } else 7734 fan_watchdog_active = 0; 7735 } 7736 7737 static void fan_watchdog_fire(struct work_struct *ignored) 7738 { 7739 int rc; 7740 7741 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 7742 return; 7743 7744 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n"); 7745 rc = fan_set_enable(); 7746 if (rc < 0) { 7747 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, " 7748 "will try again later...\n", -rc); 7749 /* reschedule for later */ 7750 fan_watchdog_reset(); 7751 } 7752 } 7753 7754 /* 7755 * SYSFS fan layout: hwmon compatible (device) 7756 * 7757 * pwm*_enable: 7758 * 0: "disengaged" mode 7759 * 1: manual mode 7760 * 2: native EC "auto" mode (recommended, hardware default) 7761 * 7762 * pwm*: set speed in manual mode, ignored otherwise. 7763 * 0 is level 0; 255 is level 7. Intermediate points done with linear 7764 * interpolation. 7765 * 7766 * fan*_input: tachometer reading, RPM 7767 * 7768 * 7769 * SYSFS fan layout: extensions 7770 * 7771 * fan_watchdog (driver): 7772 * fan watchdog interval in seconds, 0 disables (default), max 120 7773 */ 7774 7775 /* sysfs fan pwm1_enable ----------------------------------------------- */ 7776 static ssize_t fan_pwm1_enable_show(struct device *dev, 7777 struct device_attribute *attr, 7778 char *buf) 7779 { 7780 int res, mode; 7781 u8 status; 7782 7783 res = fan_get_status_safe(&status); 7784 if (res) 7785 return res; 7786 7787 if (status & TP_EC_FAN_FULLSPEED) { 7788 mode = 0; 7789 } else if (status & TP_EC_FAN_AUTO) { 7790 mode = 2; 7791 } else 7792 mode = 1; 7793 7794 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 7795 } 7796 7797 static ssize_t fan_pwm1_enable_store(struct device *dev, 7798 struct device_attribute *attr, 7799 const char *buf, size_t count) 7800 { 7801 unsigned long t; 7802 int res, level; 7803 7804 if (parse_strtoul(buf, 2, &t)) 7805 return -EINVAL; 7806 7807 tpacpi_disclose_usertask("hwmon pwm1_enable", 7808 "set fan mode to %lu\n", t); 7809 7810 switch (t) { 7811 case 0: 7812 level = TP_EC_FAN_FULLSPEED; 7813 break; 7814 case 1: 7815 level = TPACPI_FAN_LAST_LEVEL; 7816 break; 7817 case 2: 7818 level = TP_EC_FAN_AUTO; 7819 break; 7820 case 3: 7821 /* reserved for software-controlled auto mode */ 7822 return -ENOSYS; 7823 default: 7824 return -EINVAL; 7825 } 7826 7827 res = fan_set_level_safe(level); 7828 if (res == -ENXIO) 7829 return -EINVAL; 7830 else if (res < 0) 7831 return res; 7832 7833 fan_watchdog_reset(); 7834 7835 return count; 7836 } 7837 7838 static struct device_attribute dev_attr_fan_pwm1_enable = 7839 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 7840 fan_pwm1_enable_show, fan_pwm1_enable_store); 7841 7842 /* sysfs fan pwm1 ------------------------------------------------------ */ 7843 static ssize_t fan_pwm1_show(struct device *dev, 7844 struct device_attribute *attr, 7845 char *buf) 7846 { 7847 int res; 7848 u8 status; 7849 7850 res = fan_get_status_safe(&status); 7851 if (res) 7852 return res; 7853 7854 if ((status & 7855 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 7856 status = fan_control_desired_level; 7857 7858 if (status > 7) 7859 status = 7; 7860 7861 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 7862 } 7863 7864 static ssize_t fan_pwm1_store(struct device *dev, 7865 struct device_attribute *attr, 7866 const char *buf, size_t count) 7867 { 7868 unsigned long s; 7869 int rc; 7870 u8 status, newlevel; 7871 7872 if (parse_strtoul(buf, 255, &s)) 7873 return -EINVAL; 7874 7875 tpacpi_disclose_usertask("hwmon pwm1", 7876 "set fan speed to %lu\n", s); 7877 7878 /* scale down from 0-255 to 0-7 */ 7879 newlevel = (s >> 5) & 0x07; 7880 7881 if (mutex_lock_killable(&fan_mutex)) 7882 return -ERESTARTSYS; 7883 7884 rc = fan_get_status(&status); 7885 if (!rc && (status & 7886 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7887 rc = fan_set_level(newlevel); 7888 if (rc == -ENXIO) 7889 rc = -EINVAL; 7890 else if (!rc) { 7891 fan_update_desired_level(newlevel); 7892 fan_watchdog_reset(); 7893 } 7894 } 7895 7896 mutex_unlock(&fan_mutex); 7897 return (rc)? rc : count; 7898 } 7899 7900 static struct device_attribute dev_attr_fan_pwm1 = 7901 __ATTR(pwm1, S_IWUSR | S_IRUGO, 7902 fan_pwm1_show, fan_pwm1_store); 7903 7904 /* sysfs fan fan1_input ------------------------------------------------ */ 7905 static ssize_t fan_fan1_input_show(struct device *dev, 7906 struct device_attribute *attr, 7907 char *buf) 7908 { 7909 int res; 7910 unsigned int speed; 7911 7912 res = fan_get_speed(&speed); 7913 if (res < 0) 7914 return res; 7915 7916 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7917 } 7918 7919 static struct device_attribute dev_attr_fan_fan1_input = 7920 __ATTR(fan1_input, S_IRUGO, 7921 fan_fan1_input_show, NULL); 7922 7923 /* sysfs fan fan2_input ------------------------------------------------ */ 7924 static ssize_t fan_fan2_input_show(struct device *dev, 7925 struct device_attribute *attr, 7926 char *buf) 7927 { 7928 int res; 7929 unsigned int speed; 7930 7931 res = fan2_get_speed(&speed); 7932 if (res < 0) 7933 return res; 7934 7935 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7936 } 7937 7938 static struct device_attribute dev_attr_fan_fan2_input = 7939 __ATTR(fan2_input, S_IRUGO, 7940 fan_fan2_input_show, NULL); 7941 7942 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 7943 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 7944 char *buf) 7945 { 7946 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 7947 } 7948 7949 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 7950 const char *buf, size_t count) 7951 { 7952 unsigned long t; 7953 7954 if (parse_strtoul(buf, 120, &t)) 7955 return -EINVAL; 7956 7957 if (!fan_control_allowed) 7958 return -EPERM; 7959 7960 fan_watchdog_maxinterval = t; 7961 fan_watchdog_reset(); 7962 7963 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 7964 7965 return count; 7966 } 7967 7968 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 7969 fan_fan_watchdog_show, fan_fan_watchdog_store); 7970 7971 /* --------------------------------------------------------------------- */ 7972 static struct attribute *fan_attributes[] = { 7973 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr, 7974 &dev_attr_fan_fan1_input.attr, 7975 NULL, /* for fan2_input */ 7976 NULL 7977 }; 7978 7979 static const struct attribute_group fan_attr_group = { 7980 .attrs = fan_attributes, 7981 }; 7982 7983 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 7984 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 7985 7986 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 7987 { .vendor = PCI_VENDOR_ID_IBM, \ 7988 .bios = TPACPI_MATCH_ANY, \ 7989 .ec = TPID(__id1, __id2), \ 7990 .quirks = __quirks } 7991 7992 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 7993 { .vendor = PCI_VENDOR_ID_LENOVO, \ 7994 .bios = TPACPI_MATCH_ANY, \ 7995 .ec = TPID(__id1, __id2), \ 7996 .quirks = __quirks } 7997 7998 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 7999 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 8000 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 8001 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 8002 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 8003 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 8004 }; 8005 8006 #undef TPACPI_FAN_QL 8007 #undef TPACPI_FAN_QI 8008 8009 static int __init fan_init(struct ibm_init_struct *iibm) 8010 { 8011 int rc; 8012 unsigned long quirks; 8013 8014 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8015 "initializing fan subdriver\n"); 8016 8017 mutex_init(&fan_mutex); 8018 fan_status_access_mode = TPACPI_FAN_NONE; 8019 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8020 fan_control_commands = 0; 8021 fan_watchdog_maxinterval = 0; 8022 tp_features.fan_ctrl_status_undef = 0; 8023 tp_features.second_fan = 0; 8024 fan_control_desired_level = 7; 8025 8026 if (tpacpi_is_ibm()) { 8027 TPACPI_ACPIHANDLE_INIT(fans); 8028 TPACPI_ACPIHANDLE_INIT(gfan); 8029 TPACPI_ACPIHANDLE_INIT(sfan); 8030 } 8031 8032 quirks = tpacpi_check_quirks(fan_quirk_table, 8033 ARRAY_SIZE(fan_quirk_table)); 8034 8035 if (gfan_handle) { 8036 /* 570, 600e/x, 770e, 770x */ 8037 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8038 } else { 8039 /* all other ThinkPads: note that even old-style 8040 * ThinkPad ECs supports the fan control register */ 8041 if (likely(acpi_ec_read(fan_status_offset, 8042 &fan_control_initial_status))) { 8043 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8044 if (quirks & TPACPI_FAN_Q1) 8045 fan_quirk1_setup(); 8046 if (quirks & TPACPI_FAN_2FAN) { 8047 tp_features.second_fan = 1; 8048 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8049 "secondary fan support enabled\n"); 8050 } 8051 } else { 8052 printk(TPACPI_ERR 8053 "ThinkPad ACPI EC access misbehaving, " 8054 "fan status and control unavailable\n"); 8055 return 1; 8056 } 8057 } 8058 8059 if (sfan_handle) { 8060 /* 570, 770x-JL */ 8061 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8062 fan_control_commands |= 8063 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8064 } else { 8065 if (!gfan_handle) { 8066 /* gfan without sfan means no fan control */ 8067 /* all other models implement TP EC 0x2f control */ 8068 8069 if (fans_handle) { 8070 /* X31, X40, X41 */ 8071 fan_control_access_mode = 8072 TPACPI_FAN_WR_ACPI_FANS; 8073 fan_control_commands |= 8074 TPACPI_FAN_CMD_SPEED | 8075 TPACPI_FAN_CMD_LEVEL | 8076 TPACPI_FAN_CMD_ENABLE; 8077 } else { 8078 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8079 fan_control_commands |= 8080 TPACPI_FAN_CMD_LEVEL | 8081 TPACPI_FAN_CMD_ENABLE; 8082 } 8083 } 8084 } 8085 8086 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8087 "fan is %s, modes %d, %d\n", 8088 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8089 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8090 fan_status_access_mode, fan_control_access_mode); 8091 8092 /* fan control master switch */ 8093 if (!fan_control_allowed) { 8094 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8095 fan_control_commands = 0; 8096 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8097 "fan control features disabled by parameter\n"); 8098 } 8099 8100 /* update fan_control_desired_level */ 8101 if (fan_status_access_mode != TPACPI_FAN_NONE) 8102 fan_get_status_safe(NULL); 8103 8104 if (fan_status_access_mode != TPACPI_FAN_NONE || 8105 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8106 if (tp_features.second_fan) { 8107 /* attach second fan tachometer */ 8108 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8109 &dev_attr_fan_fan2_input.attr; 8110 } 8111 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8112 &fan_attr_group); 8113 if (rc < 0) 8114 return rc; 8115 8116 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8117 &driver_attr_fan_watchdog); 8118 if (rc < 0) { 8119 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8120 &fan_attr_group); 8121 return rc; 8122 } 8123 return 0; 8124 } else 8125 return 1; 8126 } 8127 8128 static void fan_exit(void) 8129 { 8130 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8131 "cancelling any pending fan watchdog tasks\n"); 8132 8133 /* FIXME: can we really do this unconditionally? */ 8134 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8135 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8136 &driver_attr_fan_watchdog); 8137 8138 cancel_delayed_work(&fan_watchdog_task); 8139 flush_workqueue(tpacpi_wq); 8140 } 8141 8142 static void fan_suspend(pm_message_t state) 8143 { 8144 int rc; 8145 8146 if (!fan_control_allowed) 8147 return; 8148 8149 /* Store fan status in cache */ 8150 fan_control_resume_level = 0; 8151 rc = fan_get_status_safe(&fan_control_resume_level); 8152 if (rc < 0) 8153 printk(TPACPI_NOTICE 8154 "failed to read fan level for later " 8155 "restore during resume: %d\n", rc); 8156 8157 /* if it is undefined, don't attempt to restore it. 8158 * KEEP THIS LAST */ 8159 if (tp_features.fan_ctrl_status_undef) 8160 fan_control_resume_level = 0; 8161 } 8162 8163 static void fan_resume(void) 8164 { 8165 u8 current_level = 7; 8166 bool do_set = false; 8167 int rc; 8168 8169 /* DSDT *always* updates status on resume */ 8170 tp_features.fan_ctrl_status_undef = 0; 8171 8172 if (!fan_control_allowed || 8173 !fan_control_resume_level || 8174 (fan_get_status_safe(¤t_level) < 0)) 8175 return; 8176 8177 switch (fan_control_access_mode) { 8178 case TPACPI_FAN_WR_ACPI_SFAN: 8179 /* never decrease fan level */ 8180 do_set = (fan_control_resume_level > current_level); 8181 break; 8182 case TPACPI_FAN_WR_ACPI_FANS: 8183 case TPACPI_FAN_WR_TPEC: 8184 /* never decrease fan level, scale is: 8185 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8186 * 8187 * We expect the firmware to set either 7 or AUTO, but we 8188 * handle FULLSPEED out of paranoia. 8189 * 8190 * So, we can safely only restore FULLSPEED or 7, anything 8191 * else could slow the fan. Restoring AUTO is useless, at 8192 * best that's exactly what the DSDT already set (it is the 8193 * slower it uses). 8194 * 8195 * Always keep in mind that the DSDT *will* have set the 8196 * fans to what the vendor supposes is the best level. We 8197 * muck with it only to speed the fan up. 8198 */ 8199 if (fan_control_resume_level != 7 && 8200 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8201 return; 8202 else 8203 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8204 (current_level != fan_control_resume_level); 8205 break; 8206 default: 8207 return; 8208 } 8209 if (do_set) { 8210 printk(TPACPI_NOTICE 8211 "restoring fan level to 0x%02x\n", 8212 fan_control_resume_level); 8213 rc = fan_set_level_safe(fan_control_resume_level); 8214 if (rc < 0) 8215 printk(TPACPI_NOTICE 8216 "failed to restore fan level: %d\n", rc); 8217 } 8218 } 8219 8220 static int fan_read(struct seq_file *m) 8221 { 8222 int rc; 8223 u8 status; 8224 unsigned int speed = 0; 8225 8226 switch (fan_status_access_mode) { 8227 case TPACPI_FAN_RD_ACPI_GFAN: 8228 /* 570, 600e/x, 770e, 770x */ 8229 rc = fan_get_status_safe(&status); 8230 if (rc < 0) 8231 return rc; 8232 8233 seq_printf(m, "status:\t\t%s\n" 8234 "level:\t\t%d\n", 8235 (status != 0) ? "enabled" : "disabled", status); 8236 break; 8237 8238 case TPACPI_FAN_RD_TPEC: 8239 /* all except 570, 600e/x, 770e, 770x */ 8240 rc = fan_get_status_safe(&status); 8241 if (rc < 0) 8242 return rc; 8243 8244 seq_printf(m, "status:\t\t%s\n", 8245 (status != 0) ? "enabled" : "disabled"); 8246 8247 rc = fan_get_speed(&speed); 8248 if (rc < 0) 8249 return rc; 8250 8251 seq_printf(m, "speed:\t\t%d\n", speed); 8252 8253 if (status & TP_EC_FAN_FULLSPEED) 8254 /* Disengaged mode takes precedence */ 8255 seq_printf(m, "level:\t\tdisengaged\n"); 8256 else if (status & TP_EC_FAN_AUTO) 8257 seq_printf(m, "level:\t\tauto\n"); 8258 else 8259 seq_printf(m, "level:\t\t%d\n", status); 8260 break; 8261 8262 case TPACPI_FAN_NONE: 8263 default: 8264 seq_printf(m, "status:\t\tnot supported\n"); 8265 } 8266 8267 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8268 seq_printf(m, "commands:\tlevel <level>"); 8269 8270 switch (fan_control_access_mode) { 8271 case TPACPI_FAN_WR_ACPI_SFAN: 8272 seq_printf(m, " (<level> is 0-7)\n"); 8273 break; 8274 8275 default: 8276 seq_printf(m, " (<level> is 0-7, " 8277 "auto, disengaged, full-speed)\n"); 8278 break; 8279 } 8280 } 8281 8282 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8283 seq_printf(m, "commands:\tenable, disable\n" 8284 "commands:\twatchdog <timeout> (<timeout> " 8285 "is 0 (off), 1-120 (seconds))\n"); 8286 8287 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8288 seq_printf(m, "commands:\tspeed <speed>" 8289 " (<speed> is 0-65535)\n"); 8290 8291 return 0; 8292 } 8293 8294 static int fan_write_cmd_level(const char *cmd, int *rc) 8295 { 8296 int level; 8297 8298 if (strlencmp(cmd, "level auto") == 0) 8299 level = TP_EC_FAN_AUTO; 8300 else if ((strlencmp(cmd, "level disengaged") == 0) | 8301 (strlencmp(cmd, "level full-speed") == 0)) 8302 level = TP_EC_FAN_FULLSPEED; 8303 else if (sscanf(cmd, "level %d", &level) != 1) 8304 return 0; 8305 8306 *rc = fan_set_level_safe(level); 8307 if (*rc == -ENXIO) 8308 printk(TPACPI_ERR "level command accepted for unsupported " 8309 "access mode %d", fan_control_access_mode); 8310 else if (!*rc) 8311 tpacpi_disclose_usertask("procfs fan", 8312 "set level to %d\n", level); 8313 8314 return 1; 8315 } 8316 8317 static int fan_write_cmd_enable(const char *cmd, int *rc) 8318 { 8319 if (strlencmp(cmd, "enable") != 0) 8320 return 0; 8321 8322 *rc = fan_set_enable(); 8323 if (*rc == -ENXIO) 8324 printk(TPACPI_ERR "enable command accepted for unsupported " 8325 "access mode %d", fan_control_access_mode); 8326 else if (!*rc) 8327 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8328 8329 return 1; 8330 } 8331 8332 static int fan_write_cmd_disable(const char *cmd, int *rc) 8333 { 8334 if (strlencmp(cmd, "disable") != 0) 8335 return 0; 8336 8337 *rc = fan_set_disable(); 8338 if (*rc == -ENXIO) 8339 printk(TPACPI_ERR "disable command accepted for unsupported " 8340 "access mode %d", fan_control_access_mode); 8341 else if (!*rc) 8342 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8343 8344 return 1; 8345 } 8346 8347 static int fan_write_cmd_speed(const char *cmd, int *rc) 8348 { 8349 int speed; 8350 8351 /* TODO: 8352 * Support speed <low> <medium> <high> ? */ 8353 8354 if (sscanf(cmd, "speed %d", &speed) != 1) 8355 return 0; 8356 8357 *rc = fan_set_speed(speed); 8358 if (*rc == -ENXIO) 8359 printk(TPACPI_ERR "speed command accepted for unsupported " 8360 "access mode %d", fan_control_access_mode); 8361 else if (!*rc) 8362 tpacpi_disclose_usertask("procfs fan", 8363 "set speed to %d\n", speed); 8364 8365 return 1; 8366 } 8367 8368 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8369 { 8370 int interval; 8371 8372 if (sscanf(cmd, "watchdog %d", &interval) != 1) 8373 return 0; 8374 8375 if (interval < 0 || interval > 120) 8376 *rc = -EINVAL; 8377 else { 8378 fan_watchdog_maxinterval = interval; 8379 tpacpi_disclose_usertask("procfs fan", 8380 "set watchdog timer to %d\n", 8381 interval); 8382 } 8383 8384 return 1; 8385 } 8386 8387 static int fan_write(char *buf) 8388 { 8389 char *cmd; 8390 int rc = 0; 8391 8392 while (!rc && (cmd = next_cmd(&buf))) { 8393 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 8394 fan_write_cmd_level(cmd, &rc)) && 8395 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 8396 (fan_write_cmd_enable(cmd, &rc) || 8397 fan_write_cmd_disable(cmd, &rc) || 8398 fan_write_cmd_watchdog(cmd, &rc))) && 8399 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 8400 fan_write_cmd_speed(cmd, &rc)) 8401 ) 8402 rc = -EINVAL; 8403 else if (!rc) 8404 fan_watchdog_reset(); 8405 } 8406 8407 return rc; 8408 } 8409 8410 static struct ibm_struct fan_driver_data = { 8411 .name = "fan", 8412 .read = fan_read, 8413 .write = fan_write, 8414 .exit = fan_exit, 8415 .suspend = fan_suspend, 8416 .resume = fan_resume, 8417 }; 8418 8419 /**************************************************************************** 8420 **************************************************************************** 8421 * 8422 * Infrastructure 8423 * 8424 **************************************************************************** 8425 ****************************************************************************/ 8426 8427 /* 8428 * HKEY event callout for other subdrivers go here 8429 * (yes, it is ugly, but it is quick, safe, and gets the job done 8430 */ 8431 static void tpacpi_driver_event(const unsigned int hkey_event) 8432 { 8433 if (ibm_backlight_device) { 8434 switch (hkey_event) { 8435 case TP_HKEY_EV_BRGHT_UP: 8436 case TP_HKEY_EV_BRGHT_DOWN: 8437 tpacpi_brightness_notify_change(); 8438 } 8439 } 8440 if (alsa_card) { 8441 switch (hkey_event) { 8442 case TP_HKEY_EV_VOL_UP: 8443 case TP_HKEY_EV_VOL_DOWN: 8444 case TP_HKEY_EV_VOL_MUTE: 8445 volume_alsa_notify_change(); 8446 } 8447 } 8448 } 8449 8450 static void hotkey_driver_event(const unsigned int scancode) 8451 { 8452 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 8453 } 8454 8455 /* sysfs name ---------------------------------------------------------- */ 8456 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 8457 struct device_attribute *attr, 8458 char *buf) 8459 { 8460 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 8461 } 8462 8463 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name = 8464 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 8465 8466 /* --------------------------------------------------------------------- */ 8467 8468 /* /proc support */ 8469 static struct proc_dir_entry *proc_dir; 8470 8471 /* 8472 * Module and infrastructure proble, init and exit handling 8473 */ 8474 8475 static int force_load; 8476 8477 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 8478 static const char * __init str_supported(int is_supported) 8479 { 8480 static char text_unsupported[] __initdata = "not supported"; 8481 8482 return (is_supported)? &text_unsupported[4] : &text_unsupported[0]; 8483 } 8484 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 8485 8486 static void ibm_exit(struct ibm_struct *ibm) 8487 { 8488 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 8489 8490 list_del_init(&ibm->all_drivers); 8491 8492 if (ibm->flags.acpi_notify_installed) { 8493 dbg_printk(TPACPI_DBG_EXIT, 8494 "%s: acpi_remove_notify_handler\n", ibm->name); 8495 BUG_ON(!ibm->acpi); 8496 acpi_remove_notify_handler(*ibm->acpi->handle, 8497 ibm->acpi->type, 8498 dispatch_acpi_notify); 8499 ibm->flags.acpi_notify_installed = 0; 8500 } 8501 8502 if (ibm->flags.proc_created) { 8503 dbg_printk(TPACPI_DBG_EXIT, 8504 "%s: remove_proc_entry\n", ibm->name); 8505 remove_proc_entry(ibm->name, proc_dir); 8506 ibm->flags.proc_created = 0; 8507 } 8508 8509 if (ibm->flags.acpi_driver_registered) { 8510 dbg_printk(TPACPI_DBG_EXIT, 8511 "%s: acpi_bus_unregister_driver\n", ibm->name); 8512 BUG_ON(!ibm->acpi); 8513 acpi_bus_unregister_driver(ibm->acpi->driver); 8514 kfree(ibm->acpi->driver); 8515 ibm->acpi->driver = NULL; 8516 ibm->flags.acpi_driver_registered = 0; 8517 } 8518 8519 if (ibm->flags.init_called && ibm->exit) { 8520 ibm->exit(); 8521 ibm->flags.init_called = 0; 8522 } 8523 8524 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 8525 } 8526 8527 static int __init ibm_init(struct ibm_init_struct *iibm) 8528 { 8529 int ret; 8530 struct ibm_struct *ibm = iibm->data; 8531 struct proc_dir_entry *entry; 8532 8533 BUG_ON(ibm == NULL); 8534 8535 INIT_LIST_HEAD(&ibm->all_drivers); 8536 8537 if (ibm->flags.experimental && !experimental) 8538 return 0; 8539 8540 dbg_printk(TPACPI_DBG_INIT, 8541 "probing for %s\n", ibm->name); 8542 8543 if (iibm->init) { 8544 ret = iibm->init(iibm); 8545 if (ret > 0) 8546 return 0; /* probe failed */ 8547 if (ret) 8548 return ret; 8549 8550 ibm->flags.init_called = 1; 8551 } 8552 8553 if (ibm->acpi) { 8554 if (ibm->acpi->hid) { 8555 ret = register_tpacpi_subdriver(ibm); 8556 if (ret) 8557 goto err_out; 8558 } 8559 8560 if (ibm->acpi->notify) { 8561 ret = setup_acpi_notify(ibm); 8562 if (ret == -ENODEV) { 8563 printk(TPACPI_NOTICE "disabling subdriver %s\n", 8564 ibm->name); 8565 ret = 0; 8566 goto err_out; 8567 } 8568 if (ret < 0) 8569 goto err_out; 8570 } 8571 } 8572 8573 dbg_printk(TPACPI_DBG_INIT, 8574 "%s installed\n", ibm->name); 8575 8576 if (ibm->read) { 8577 mode_t mode = iibm->base_procfs_mode; 8578 8579 if (!mode) 8580 mode = S_IRUGO; 8581 if (ibm->write) 8582 mode |= S_IWUSR; 8583 entry = proc_create_data(ibm->name, mode, proc_dir, 8584 &dispatch_proc_fops, ibm); 8585 if (!entry) { 8586 printk(TPACPI_ERR "unable to create proc entry %s\n", 8587 ibm->name); 8588 ret = -ENODEV; 8589 goto err_out; 8590 } 8591 ibm->flags.proc_created = 1; 8592 } 8593 8594 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 8595 8596 return 0; 8597 8598 err_out: 8599 dbg_printk(TPACPI_DBG_INIT, 8600 "%s: at error exit path with result %d\n", 8601 ibm->name, ret); 8602 8603 ibm_exit(ibm); 8604 return (ret < 0)? ret : 0; 8605 } 8606 8607 /* Probing */ 8608 8609 static bool __pure __init tpacpi_is_fw_digit(const char c) 8610 { 8611 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 8612 } 8613 8614 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */ 8615 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s, 8616 const char t) 8617 { 8618 return s && strlen(s) >= 8 && 8619 tpacpi_is_fw_digit(s[0]) && 8620 tpacpi_is_fw_digit(s[1]) && 8621 s[2] == t && s[3] == 'T' && 8622 tpacpi_is_fw_digit(s[4]) && 8623 tpacpi_is_fw_digit(s[5]) && 8624 s[6] == 'W' && s[7] == 'W'; 8625 } 8626 8627 /* returns 0 - probe ok, or < 0 - probe error. 8628 * Probe ok doesn't mean thinkpad found. 8629 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 8630 static int __must_check __init get_thinkpad_model_data( 8631 struct thinkpad_id_data *tp) 8632 { 8633 const struct dmi_device *dev = NULL; 8634 char ec_fw_string[18]; 8635 char const *s; 8636 8637 if (!tp) 8638 return -EINVAL; 8639 8640 memset(tp, 0, sizeof(*tp)); 8641 8642 if (dmi_name_in_vendors("IBM")) 8643 tp->vendor = PCI_VENDOR_ID_IBM; 8644 else if (dmi_name_in_vendors("LENOVO")) 8645 tp->vendor = PCI_VENDOR_ID_LENOVO; 8646 else 8647 return 0; 8648 8649 s = dmi_get_system_info(DMI_BIOS_VERSION); 8650 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 8651 if (s && !tp->bios_version_str) 8652 return -ENOMEM; 8653 8654 /* Really ancient ThinkPad 240X will fail this, which is fine */ 8655 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E')) 8656 return 0; 8657 8658 tp->bios_model = tp->bios_version_str[0] 8659 | (tp->bios_version_str[1] << 8); 8660 tp->bios_release = (tp->bios_version_str[4] << 8) 8661 | tp->bios_version_str[5]; 8662 8663 /* 8664 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 8665 * X32 or newer, all Z series; Some models must have an 8666 * up-to-date BIOS or they will not be detected. 8667 * 8668 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 8669 */ 8670 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 8671 if (sscanf(dev->name, 8672 "IBM ThinkPad Embedded Controller -[%17c", 8673 ec_fw_string) == 1) { 8674 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 8675 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 8676 8677 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 8678 if (!tp->ec_version_str) 8679 return -ENOMEM; 8680 8681 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 8682 tp->ec_model = ec_fw_string[0] 8683 | (ec_fw_string[1] << 8); 8684 tp->ec_release = (ec_fw_string[4] << 8) 8685 | ec_fw_string[5]; 8686 } else { 8687 printk(TPACPI_NOTICE 8688 "ThinkPad firmware release %s " 8689 "doesn't match the known patterns\n", 8690 ec_fw_string); 8691 printk(TPACPI_NOTICE 8692 "please report this to %s\n", 8693 TPACPI_MAIL); 8694 } 8695 break; 8696 } 8697 } 8698 8699 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 8700 if (s && !strnicmp(s, "ThinkPad", 8)) { 8701 tp->model_str = kstrdup(s, GFP_KERNEL); 8702 if (!tp->model_str) 8703 return -ENOMEM; 8704 } 8705 8706 s = dmi_get_system_info(DMI_PRODUCT_NAME); 8707 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 8708 if (s && !tp->nummodel_str) 8709 return -ENOMEM; 8710 8711 return 0; 8712 } 8713 8714 static int __init probe_for_thinkpad(void) 8715 { 8716 int is_thinkpad; 8717 8718 if (acpi_disabled) 8719 return -ENODEV; 8720 8721 /* It would be dangerous to run the driver in this case */ 8722 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 8723 return -ENODEV; 8724 8725 /* 8726 * Non-ancient models have better DMI tagging, but very old models 8727 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 8728 */ 8729 is_thinkpad = (thinkpad_id.model_str != NULL) || 8730 (thinkpad_id.ec_model != 0) || 8731 tpacpi_is_fw_known(); 8732 8733 /* The EC handler is required */ 8734 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 8735 if (!ec_handle) { 8736 if (is_thinkpad) 8737 printk(TPACPI_ERR 8738 "Not yet supported ThinkPad detected!\n"); 8739 return -ENODEV; 8740 } 8741 8742 if (!is_thinkpad && !force_load) 8743 return -ENODEV; 8744 8745 return 0; 8746 } 8747 8748 static void __init thinkpad_acpi_init_banner(void) 8749 { 8750 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 8751 printk(TPACPI_INFO "%s\n", TPACPI_URL); 8752 8753 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n", 8754 (thinkpad_id.bios_version_str) ? 8755 thinkpad_id.bios_version_str : "unknown", 8756 (thinkpad_id.ec_version_str) ? 8757 thinkpad_id.ec_version_str : "unknown"); 8758 8759 BUG_ON(!thinkpad_id.vendor); 8760 8761 if (thinkpad_id.model_str) 8762 printk(TPACPI_INFO "%s %s, model %s\n", 8763 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 8764 "IBM" : ((thinkpad_id.vendor == 8765 PCI_VENDOR_ID_LENOVO) ? 8766 "Lenovo" : "Unknown vendor"), 8767 thinkpad_id.model_str, 8768 (thinkpad_id.nummodel_str) ? 8769 thinkpad_id.nummodel_str : "unknown"); 8770 } 8771 8772 /* Module init, exit, parameters */ 8773 8774 static struct ibm_init_struct ibms_init[] __initdata = { 8775 { 8776 .data = &thinkpad_acpi_driver_data, 8777 }, 8778 { 8779 .init = hotkey_init, 8780 .data = &hotkey_driver_data, 8781 }, 8782 { 8783 .init = bluetooth_init, 8784 .data = &bluetooth_driver_data, 8785 }, 8786 { 8787 .init = wan_init, 8788 .data = &wan_driver_data, 8789 }, 8790 { 8791 .init = uwb_init, 8792 .data = &uwb_driver_data, 8793 }, 8794 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 8795 { 8796 .init = video_init, 8797 .base_procfs_mode = S_IRUSR, 8798 .data = &video_driver_data, 8799 }, 8800 #endif 8801 { 8802 .init = light_init, 8803 .data = &light_driver_data, 8804 }, 8805 { 8806 .init = cmos_init, 8807 .data = &cmos_driver_data, 8808 }, 8809 { 8810 .init = led_init, 8811 .data = &led_driver_data, 8812 }, 8813 { 8814 .init = beep_init, 8815 .data = &beep_driver_data, 8816 }, 8817 { 8818 .init = thermal_init, 8819 .data = &thermal_driver_data, 8820 }, 8821 { 8822 .init = brightness_init, 8823 .data = &brightness_driver_data, 8824 }, 8825 { 8826 .init = volume_init, 8827 .data = &volume_driver_data, 8828 }, 8829 { 8830 .init = fan_init, 8831 .data = &fan_driver_data, 8832 }, 8833 }; 8834 8835 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 8836 { 8837 unsigned int i; 8838 struct ibm_struct *ibm; 8839 8840 if (!kp || !kp->name || !val) 8841 return -EINVAL; 8842 8843 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 8844 ibm = ibms_init[i].data; 8845 WARN_ON(ibm == NULL); 8846 8847 if (!ibm || !ibm->name) 8848 continue; 8849 8850 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 8851 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 8852 return -ENOSPC; 8853 strcpy(ibms_init[i].param, val); 8854 strcat(ibms_init[i].param, ","); 8855 return 0; 8856 } 8857 } 8858 8859 return -EINVAL; 8860 } 8861 8862 module_param(experimental, int, 0444); 8863 MODULE_PARM_DESC(experimental, 8864 "Enables experimental features when non-zero"); 8865 8866 module_param_named(debug, dbg_level, uint, 0); 8867 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 8868 8869 module_param(force_load, bool, 0444); 8870 MODULE_PARM_DESC(force_load, 8871 "Attempts to load the driver even on a " 8872 "mis-identified ThinkPad when true"); 8873 8874 module_param_named(fan_control, fan_control_allowed, bool, 0444); 8875 MODULE_PARM_DESC(fan_control, 8876 "Enables setting fan parameters features when true"); 8877 8878 module_param_named(brightness_mode, brightness_mode, uint, 0444); 8879 MODULE_PARM_DESC(brightness_mode, 8880 "Selects brightness control strategy: " 8881 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 8882 8883 module_param(brightness_enable, uint, 0444); 8884 MODULE_PARM_DESC(brightness_enable, 8885 "Enables backlight control when 1, disables when 0"); 8886 8887 module_param(hotkey_report_mode, uint, 0444); 8888 MODULE_PARM_DESC(hotkey_report_mode, 8889 "used for backwards compatibility with userspace, " 8890 "see documentation"); 8891 8892 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 8893 module_param_named(volume_mode, volume_mode, uint, 0444); 8894 MODULE_PARM_DESC(volume_mode, 8895 "Selects volume control strategy: " 8896 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 8897 8898 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 8899 MODULE_PARM_DESC(volume_capabilities, 8900 "Selects the mixer capabilites: " 8901 "0=auto, 1=volume and mute, 2=mute only"); 8902 8903 module_param_named(volume_control, volume_control_allowed, bool, 0444); 8904 MODULE_PARM_DESC(volume_control, 8905 "Enables software override for the console audio " 8906 "control when true"); 8907 8908 /* ALSA module API parameters */ 8909 module_param_named(index, alsa_index, int, 0444); 8910 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 8911 module_param_named(id, alsa_id, charp, 0444); 8912 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 8913 module_param_named(enable, alsa_enable, bool, 0444); 8914 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 8915 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 8916 8917 #define TPACPI_PARAM(feature) \ 8918 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 8919 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 8920 "at module load, see documentation") 8921 8922 TPACPI_PARAM(hotkey); 8923 TPACPI_PARAM(bluetooth); 8924 TPACPI_PARAM(video); 8925 TPACPI_PARAM(light); 8926 TPACPI_PARAM(cmos); 8927 TPACPI_PARAM(led); 8928 TPACPI_PARAM(beep); 8929 TPACPI_PARAM(brightness); 8930 TPACPI_PARAM(volume); 8931 TPACPI_PARAM(fan); 8932 8933 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 8934 module_param(dbg_wlswemul, uint, 0444); 8935 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 8936 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 8937 MODULE_PARM_DESC(wlsw_state, 8938 "Initial state of the emulated WLSW switch"); 8939 8940 module_param(dbg_bluetoothemul, uint, 0444); 8941 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 8942 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 8943 MODULE_PARM_DESC(bluetooth_state, 8944 "Initial state of the emulated bluetooth switch"); 8945 8946 module_param(dbg_wwanemul, uint, 0444); 8947 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 8948 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 8949 MODULE_PARM_DESC(wwan_state, 8950 "Initial state of the emulated WWAN switch"); 8951 8952 module_param(dbg_uwbemul, uint, 0444); 8953 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 8954 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 8955 MODULE_PARM_DESC(uwb_state, 8956 "Initial state of the emulated UWB switch"); 8957 #endif 8958 8959 static void thinkpad_acpi_module_exit(void) 8960 { 8961 struct ibm_struct *ibm, *itmp; 8962 8963 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 8964 8965 list_for_each_entry_safe_reverse(ibm, itmp, 8966 &tpacpi_all_drivers, 8967 all_drivers) { 8968 ibm_exit(ibm); 8969 } 8970 8971 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 8972 8973 if (tpacpi_inputdev) { 8974 if (tp_features.input_device_registered) 8975 input_unregister_device(tpacpi_inputdev); 8976 else 8977 input_free_device(tpacpi_inputdev); 8978 } 8979 8980 if (tpacpi_hwmon) 8981 hwmon_device_unregister(tpacpi_hwmon); 8982 8983 if (tp_features.sensors_pdev_attrs_registered) 8984 device_remove_file(&tpacpi_sensors_pdev->dev, 8985 &dev_attr_thinkpad_acpi_pdev_name); 8986 if (tpacpi_sensors_pdev) 8987 platform_device_unregister(tpacpi_sensors_pdev); 8988 if (tpacpi_pdev) 8989 platform_device_unregister(tpacpi_pdev); 8990 8991 if (tp_features.sensors_pdrv_attrs_registered) 8992 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 8993 if (tp_features.platform_drv_attrs_registered) 8994 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 8995 8996 if (tp_features.sensors_pdrv_registered) 8997 platform_driver_unregister(&tpacpi_hwmon_pdriver); 8998 8999 if (tp_features.platform_drv_registered) 9000 platform_driver_unregister(&tpacpi_pdriver); 9001 9002 if (proc_dir) 9003 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 9004 9005 if (tpacpi_wq) 9006 destroy_workqueue(tpacpi_wq); 9007 9008 kfree(thinkpad_id.bios_version_str); 9009 kfree(thinkpad_id.ec_version_str); 9010 kfree(thinkpad_id.model_str); 9011 } 9012 9013 9014 static int __init thinkpad_acpi_module_init(void) 9015 { 9016 int ret, i; 9017 9018 tpacpi_lifecycle = TPACPI_LIFE_INIT; 9019 9020 /* Parameter checking */ 9021 if (hotkey_report_mode > 2) 9022 return -EINVAL; 9023 9024 /* Driver-level probe */ 9025 9026 ret = get_thinkpad_model_data(&thinkpad_id); 9027 if (ret) { 9028 printk(TPACPI_ERR 9029 "unable to get DMI data: %d\n", ret); 9030 thinkpad_acpi_module_exit(); 9031 return ret; 9032 } 9033 ret = probe_for_thinkpad(); 9034 if (ret) { 9035 thinkpad_acpi_module_exit(); 9036 return ret; 9037 } 9038 9039 /* Driver initialization */ 9040 9041 thinkpad_acpi_init_banner(); 9042 tpacpi_check_outdated_fw(); 9043 9044 TPACPI_ACPIHANDLE_INIT(ecrd); 9045 TPACPI_ACPIHANDLE_INIT(ecwr); 9046 9047 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 9048 if (!tpacpi_wq) { 9049 thinkpad_acpi_module_exit(); 9050 return -ENOMEM; 9051 } 9052 9053 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 9054 if (!proc_dir) { 9055 printk(TPACPI_ERR 9056 "unable to create proc dir " TPACPI_PROC_DIR); 9057 thinkpad_acpi_module_exit(); 9058 return -ENODEV; 9059 } 9060 9061 ret = platform_driver_register(&tpacpi_pdriver); 9062 if (ret) { 9063 printk(TPACPI_ERR 9064 "unable to register main platform driver\n"); 9065 thinkpad_acpi_module_exit(); 9066 return ret; 9067 } 9068 tp_features.platform_drv_registered = 1; 9069 9070 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 9071 if (ret) { 9072 printk(TPACPI_ERR 9073 "unable to register hwmon platform driver\n"); 9074 thinkpad_acpi_module_exit(); 9075 return ret; 9076 } 9077 tp_features.sensors_pdrv_registered = 1; 9078 9079 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 9080 if (!ret) { 9081 tp_features.platform_drv_attrs_registered = 1; 9082 ret = tpacpi_create_driver_attributes( 9083 &tpacpi_hwmon_pdriver.driver); 9084 } 9085 if (ret) { 9086 printk(TPACPI_ERR 9087 "unable to create sysfs driver attributes\n"); 9088 thinkpad_acpi_module_exit(); 9089 return ret; 9090 } 9091 tp_features.sensors_pdrv_attrs_registered = 1; 9092 9093 9094 /* Device initialization */ 9095 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9096 NULL, 0); 9097 if (IS_ERR(tpacpi_pdev)) { 9098 ret = PTR_ERR(tpacpi_pdev); 9099 tpacpi_pdev = NULL; 9100 printk(TPACPI_ERR "unable to register platform device\n"); 9101 thinkpad_acpi_module_exit(); 9102 return ret; 9103 } 9104 tpacpi_sensors_pdev = platform_device_register_simple( 9105 TPACPI_HWMON_DRVR_NAME, 9106 -1, NULL, 0); 9107 if (IS_ERR(tpacpi_sensors_pdev)) { 9108 ret = PTR_ERR(tpacpi_sensors_pdev); 9109 tpacpi_sensors_pdev = NULL; 9110 printk(TPACPI_ERR 9111 "unable to register hwmon platform device\n"); 9112 thinkpad_acpi_module_exit(); 9113 return ret; 9114 } 9115 ret = device_create_file(&tpacpi_sensors_pdev->dev, 9116 &dev_attr_thinkpad_acpi_pdev_name); 9117 if (ret) { 9118 printk(TPACPI_ERR 9119 "unable to create sysfs hwmon device attributes\n"); 9120 thinkpad_acpi_module_exit(); 9121 return ret; 9122 } 9123 tp_features.sensors_pdev_attrs_registered = 1; 9124 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9125 if (IS_ERR(tpacpi_hwmon)) { 9126 ret = PTR_ERR(tpacpi_hwmon); 9127 tpacpi_hwmon = NULL; 9128 printk(TPACPI_ERR "unable to register hwmon device\n"); 9129 thinkpad_acpi_module_exit(); 9130 return ret; 9131 } 9132 mutex_init(&tpacpi_inputdev_send_mutex); 9133 tpacpi_inputdev = input_allocate_device(); 9134 if (!tpacpi_inputdev) { 9135 printk(TPACPI_ERR "unable to allocate input device\n"); 9136 thinkpad_acpi_module_exit(); 9137 return -ENOMEM; 9138 } else { 9139 /* Prepare input device, but don't register */ 9140 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9141 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9142 tpacpi_inputdev->id.bustype = BUS_HOST; 9143 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9144 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9145 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9146 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9147 } 9148 9149 /* Init subdriver dependencies */ 9150 tpacpi_detect_brightness_capabilities(); 9151 9152 /* Init subdrivers */ 9153 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9154 ret = ibm_init(&ibms_init[i]); 9155 if (ret >= 0 && *ibms_init[i].param) 9156 ret = ibms_init[i].data->write(ibms_init[i].param); 9157 if (ret < 0) { 9158 thinkpad_acpi_module_exit(); 9159 return ret; 9160 } 9161 } 9162 9163 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9164 9165 ret = input_register_device(tpacpi_inputdev); 9166 if (ret < 0) { 9167 printk(TPACPI_ERR "unable to register input device\n"); 9168 thinkpad_acpi_module_exit(); 9169 return ret; 9170 } else { 9171 tp_features.input_device_registered = 1; 9172 } 9173 9174 return 0; 9175 } 9176 9177 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9178 9179 /* 9180 * This will autoload the driver in almost every ThinkPad 9181 * in widespread use. 9182 * 9183 * Only _VERY_ old models, like the 240, 240x and 570 lack 9184 * the HKEY event interface. 9185 */ 9186 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9187 9188 /* 9189 * DMI matching for module autoloading 9190 * 9191 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9192 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9193 * 9194 * Only models listed in thinkwiki will be supported, so add yours 9195 * if it is not there yet. 9196 */ 9197 #define IBM_BIOS_MODULE_ALIAS(__type) \ 9198 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9199 9200 /* Ancient thinkpad BIOSes have to be identified by 9201 * BIOS type or model number, and there are far less 9202 * BIOS types than model numbers... */ 9203 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9204 9205 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9206 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9207 MODULE_DESCRIPTION(TPACPI_DESC); 9208 MODULE_VERSION(TPACPI_VERSION); 9209 MODULE_LICENSE("GPL"); 9210 9211 module_init(thinkpad_acpi_module_init); 9212 module_exit(thinkpad_acpi_module_exit); 9213