1 /* 2 * thinkpad_acpi.c - ThinkPad ACPI Extras 3 * 4 * 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net> 6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #define TPACPI_VERSION "0.26" 27 #define TPACPI_SYSFS_VERSION 0x030000 28 29 /* 30 * Changelog: 31 * 2007-10-20 changelog trimmed down 32 * 33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 34 * drivers/misc. 35 * 36 * 2006-11-22 0.13 new maintainer 37 * changelog now lives in git commit history, and will 38 * not be updated further in-file. 39 * 40 * 2005-03-17 0.11 support for 600e, 770x 41 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 42 * 43 * 2005-01-16 0.9 use MODULE_VERSION 44 * thanks to Henrik Brix Andersen <brix@gentoo.org> 45 * fix parameter passing on module loading 46 * thanks to Rusty Russell <rusty@rustcorp.com.au> 47 * thanks to Jim Radford <radford@blackbean.org> 48 * 2004-11-08 0.8 fix init error case, don't return from a macro 49 * thanks to Chris Wright <chrisw@osdl.org> 50 */ 51 52 #include <linux/kernel.h> 53 #include <linux/module.h> 54 #include <linux/init.h> 55 #include <linux/types.h> 56 #include <linux/string.h> 57 #include <linux/list.h> 58 #include <linux/mutex.h> 59 #include <linux/sched.h> 60 #include <linux/kthread.h> 61 #include <linux/freezer.h> 62 #include <linux/delay.h> 63 #include <linux/slab.h> 64 #include <linux/nvram.h> 65 #include <linux/proc_fs.h> 66 #include <linux/seq_file.h> 67 #include <linux/sysfs.h> 68 #include <linux/backlight.h> 69 #include <linux/bitops.h> 70 #include <linux/fb.h> 71 #include <linux/platform_device.h> 72 #include <linux/hwmon.h> 73 #include <linux/hwmon-sysfs.h> 74 #include <linux/input.h> 75 #include <linux/leds.h> 76 #include <linux/rfkill.h> 77 #include <linux/dmi.h> 78 #include <linux/jiffies.h> 79 #include <linux/workqueue.h> 80 #include <linux/acpi.h> 81 #include <linux/pci_ids.h> 82 #include <linux/power_supply.h> 83 #include <linux/thinkpad_acpi.h> 84 #include <sound/core.h> 85 #include <sound/control.h> 86 #include <sound/initval.h> 87 #include <linux/uaccess.h> 88 #include <acpi/battery.h> 89 #include <acpi/video.h> 90 91 /* ThinkPad CMOS commands */ 92 #define TP_CMOS_VOLUME_DOWN 0 93 #define TP_CMOS_VOLUME_UP 1 94 #define TP_CMOS_VOLUME_MUTE 2 95 #define TP_CMOS_BRIGHTNESS_UP 4 96 #define TP_CMOS_BRIGHTNESS_DOWN 5 97 #define TP_CMOS_THINKLIGHT_ON 12 98 #define TP_CMOS_THINKLIGHT_OFF 13 99 100 /* NVRAM Addresses */ 101 enum tp_nvram_addr { 102 TP_NVRAM_ADDR_HK2 = 0x57, 103 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 104 TP_NVRAM_ADDR_VIDEO = 0x59, 105 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 106 TP_NVRAM_ADDR_MIXER = 0x60, 107 }; 108 109 /* NVRAM bit masks */ 110 enum { 111 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 112 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 113 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 114 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 115 TP_NVRAM_MASK_THINKLIGHT = 0x10, 116 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 117 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 118 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 119 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 120 TP_NVRAM_MASK_MUTE = 0x40, 121 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 122 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 123 TP_NVRAM_POS_LEVEL_VOLUME = 0, 124 }; 125 126 /* Misc NVRAM-related */ 127 enum { 128 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 129 }; 130 131 /* ACPI HIDs */ 132 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 133 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 134 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID "LEN0268" 135 #define TPACPI_ACPI_EC_HID "PNP0C09" 136 137 /* Input IDs */ 138 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 139 #define TPACPI_HKEY_INPUT_VERSION 0x4101 140 141 /* ACPI \WGSV commands */ 142 enum { 143 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 144 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 145 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 146 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 147 }; 148 149 /* TP_ACPI_WGSV_GET_STATE bits */ 150 enum { 151 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 152 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 153 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 154 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 155 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 156 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 157 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 158 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 159 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 160 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 161 }; 162 163 /* HKEY events */ 164 enum tpacpi_hkey_event_t { 165 /* Hotkey-related */ 166 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 167 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 168 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 169 TP_HKEY_EV_KBD_LIGHT = 0x1012, /* Thinklight/kbd backlight */ 170 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 171 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 172 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 173 174 /* Reasons for waking up from S3/S4 */ 175 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 176 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 177 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 178 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 179 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 180 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 181 182 /* Auto-sleep after eject request */ 183 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 184 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 185 186 /* Misc bay events */ 187 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 188 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 189 or port replicator */ 190 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 191 dock or port replicator */ 192 193 /* User-interface events */ 194 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 195 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 196 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 197 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 198 TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016): 199 * enter/leave tablet mode 200 */ 201 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 202 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 203 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 204 205 /* Key-related user-interface events */ 206 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 207 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 208 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */ 209 210 /* Thermal events */ 211 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 212 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 213 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 214 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 215 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* windows; thermal table changed */ 216 TP_HKEY_EV_THM_CSM_COMPLETED = 0x6032, /* windows; thermal control set 217 * command completed. Related to 218 * AML DYTC */ 219 TP_HKEY_EV_THM_TRANSFM_CHANGED = 0x60F0, /* windows; thermal transformation 220 * changed. Related to AML GMTS */ 221 222 /* AC-related events */ 223 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 224 225 /* Further user-interface events */ 226 TP_HKEY_EV_PALM_DETECTED = 0x60b0, /* palm hoveres keyboard */ 227 TP_HKEY_EV_PALM_UNDETECTED = 0x60b1, /* palm removed */ 228 229 /* Misc */ 230 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 231 }; 232 233 /**************************************************************************** 234 * Main driver 235 */ 236 237 #define TPACPI_NAME "thinkpad" 238 #define TPACPI_DESC "ThinkPad ACPI Extras" 239 #define TPACPI_FILE TPACPI_NAME "_acpi" 240 #define TPACPI_URL "http://ibm-acpi.sf.net/" 241 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 242 243 #define TPACPI_PROC_DIR "ibm" 244 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 245 #define TPACPI_DRVR_NAME TPACPI_FILE 246 #define TPACPI_DRVR_SHORTNAME "tpacpi" 247 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 248 249 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 250 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 251 252 #define TPACPI_MAX_ACPI_ARGS 3 253 254 /* Debugging printk groups */ 255 #define TPACPI_DBG_ALL 0xffff 256 #define TPACPI_DBG_DISCLOSETASK 0x8000 257 #define TPACPI_DBG_INIT 0x0001 258 #define TPACPI_DBG_EXIT 0x0002 259 #define TPACPI_DBG_RFKILL 0x0004 260 #define TPACPI_DBG_HKEY 0x0008 261 #define TPACPI_DBG_FAN 0x0010 262 #define TPACPI_DBG_BRGHT 0x0020 263 #define TPACPI_DBG_MIXER 0x0040 264 265 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 266 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 267 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 268 269 270 /**************************************************************************** 271 * Driver-wide structs and misc. variables 272 */ 273 274 struct ibm_struct; 275 276 struct tp_acpi_drv_struct { 277 const struct acpi_device_id *hid; 278 struct acpi_driver *driver; 279 280 void (*notify) (struct ibm_struct *, u32); 281 acpi_handle *handle; 282 u32 type; 283 struct acpi_device *device; 284 }; 285 286 struct ibm_struct { 287 char *name; 288 289 int (*read) (struct seq_file *); 290 int (*write) (char *); 291 void (*exit) (void); 292 void (*resume) (void); 293 void (*suspend) (void); 294 void (*shutdown) (void); 295 296 struct list_head all_drivers; 297 298 struct tp_acpi_drv_struct *acpi; 299 300 struct { 301 u8 acpi_driver_registered:1; 302 u8 acpi_notify_installed:1; 303 u8 proc_created:1; 304 u8 init_called:1; 305 u8 experimental:1; 306 } flags; 307 }; 308 309 struct ibm_init_struct { 310 char param[32]; 311 312 int (*init) (struct ibm_init_struct *); 313 umode_t base_procfs_mode; 314 struct ibm_struct *data; 315 }; 316 317 static struct { 318 u32 bluetooth:1; 319 u32 hotkey:1; 320 u32 hotkey_mask:1; 321 u32 hotkey_wlsw:1; 322 enum { 323 TP_HOTKEY_TABLET_NONE = 0, 324 TP_HOTKEY_TABLET_USES_MHKG, 325 TP_HOTKEY_TABLET_USES_GMMS, 326 } hotkey_tablet; 327 u32 kbdlight:1; 328 u32 light:1; 329 u32 light_status:1; 330 u32 bright_acpimode:1; 331 u32 bright_unkfw:1; 332 u32 wan:1; 333 u32 uwb:1; 334 u32 fan_ctrl_status_undef:1; 335 u32 second_fan:1; 336 u32 beep_needs_two_args:1; 337 u32 mixer_no_level_control:1; 338 u32 input_device_registered:1; 339 u32 platform_drv_registered:1; 340 u32 platform_drv_attrs_registered:1; 341 u32 sensors_pdrv_registered:1; 342 u32 sensors_pdrv_attrs_registered:1; 343 u32 sensors_pdev_attrs_registered:1; 344 u32 hotkey_poll_active:1; 345 u32 has_adaptive_kbd:1; 346 u32 battery:1; 347 } tp_features; 348 349 static struct { 350 u16 hotkey_mask_ff:1; 351 u16 volume_ctrl_forbidden:1; 352 } tp_warned; 353 354 struct thinkpad_id_data { 355 unsigned int vendor; /* ThinkPad vendor: 356 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 357 358 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 359 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 360 361 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 362 u16 ec_model; 363 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 364 u16 ec_release; 365 366 char *model_str; /* ThinkPad T43 */ 367 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 368 }; 369 static struct thinkpad_id_data thinkpad_id; 370 371 static enum { 372 TPACPI_LIFE_INIT = 0, 373 TPACPI_LIFE_RUNNING, 374 TPACPI_LIFE_EXITING, 375 } tpacpi_lifecycle; 376 377 static int experimental; 378 static u32 dbg_level; 379 380 static struct workqueue_struct *tpacpi_wq; 381 382 enum led_status_t { 383 TPACPI_LED_OFF = 0, 384 TPACPI_LED_ON, 385 TPACPI_LED_BLINK, 386 }; 387 388 /* tpacpi LED class */ 389 struct tpacpi_led_classdev { 390 struct led_classdev led_classdev; 391 int led; 392 }; 393 394 /* brightness level capabilities */ 395 static unsigned int bright_maxlvl; /* 0 = unknown */ 396 397 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 398 static int dbg_wlswemul; 399 static bool tpacpi_wlsw_emulstate; 400 static int dbg_bluetoothemul; 401 static bool tpacpi_bluetooth_emulstate; 402 static int dbg_wwanemul; 403 static bool tpacpi_wwan_emulstate; 404 static int dbg_uwbemul; 405 static bool tpacpi_uwb_emulstate; 406 #endif 407 408 409 /************************************************************************* 410 * Debugging helpers 411 */ 412 413 #define dbg_printk(a_dbg_level, format, arg...) \ 414 do { \ 415 if (dbg_level & (a_dbg_level)) \ 416 printk(KERN_DEBUG pr_fmt("%s: " format), \ 417 __func__, ##arg); \ 418 } while (0) 419 420 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 421 #define vdbg_printk dbg_printk 422 static const char *str_supported(int is_supported); 423 #else 424 static inline const char *str_supported(int is_supported) { return ""; } 425 #define vdbg_printk(a_dbg_level, format, arg...) \ 426 do { if (0) no_printk(format, ##arg); } while (0) 427 #endif 428 429 static void tpacpi_log_usertask(const char * const what) 430 { 431 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 432 what, task_tgid_vnr(current)); 433 } 434 435 #define tpacpi_disclose_usertask(what, format, arg...) \ 436 do { \ 437 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 438 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 439 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 440 what, task_tgid_vnr(current), ## arg); \ 441 } \ 442 } while (0) 443 444 /* 445 * Quirk handling helpers 446 * 447 * ThinkPad IDs and versions seen in the field so far 448 * are two-characters from the set [0-9A-Z], i.e. base 36. 449 * 450 * We use values well outside that range as specials. 451 */ 452 453 #define TPACPI_MATCH_ANY 0xffffU 454 #define TPACPI_MATCH_UNKNOWN 0U 455 456 /* TPID('1', 'Y') == 0x5931 */ 457 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 458 459 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 460 { .vendor = PCI_VENDOR_ID_IBM, \ 461 .bios = TPID(__id1, __id2), \ 462 .ec = TPACPI_MATCH_ANY, \ 463 .quirks = (__quirk) } 464 465 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 466 { .vendor = PCI_VENDOR_ID_LENOVO, \ 467 .bios = TPID(__id1, __id2), \ 468 .ec = TPACPI_MATCH_ANY, \ 469 .quirks = (__quirk) } 470 471 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 472 { .vendor = PCI_VENDOR_ID_LENOVO, \ 473 .bios = TPACPI_MATCH_ANY, \ 474 .ec = TPID(__id1, __id2), \ 475 .quirks = (__quirk) } 476 477 struct tpacpi_quirk { 478 unsigned int vendor; 479 u16 bios; 480 u16 ec; 481 unsigned long quirks; 482 }; 483 484 /** 485 * tpacpi_check_quirks() - search BIOS/EC version on a list 486 * @qlist: array of &struct tpacpi_quirk 487 * @qlist_size: number of elements in @qlist 488 * 489 * Iterates over a quirks list until one is found that matches the 490 * ThinkPad's vendor, BIOS and EC model. 491 * 492 * Returns 0 if nothing matches, otherwise returns the quirks field of 493 * the matching &struct tpacpi_quirk entry. 494 * 495 * The match criteria is: vendor, ec and bios much match. 496 */ 497 static unsigned long __init tpacpi_check_quirks( 498 const struct tpacpi_quirk *qlist, 499 unsigned int qlist_size) 500 { 501 while (qlist_size) { 502 if ((qlist->vendor == thinkpad_id.vendor || 503 qlist->vendor == TPACPI_MATCH_ANY) && 504 (qlist->bios == thinkpad_id.bios_model || 505 qlist->bios == TPACPI_MATCH_ANY) && 506 (qlist->ec == thinkpad_id.ec_model || 507 qlist->ec == TPACPI_MATCH_ANY)) 508 return qlist->quirks; 509 510 qlist_size--; 511 qlist++; 512 } 513 return 0; 514 } 515 516 static inline bool __pure __init tpacpi_is_lenovo(void) 517 { 518 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 519 } 520 521 static inline bool __pure __init tpacpi_is_ibm(void) 522 { 523 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 524 } 525 526 /**************************************************************************** 527 **************************************************************************** 528 * 529 * ACPI Helpers and device model 530 * 531 **************************************************************************** 532 ****************************************************************************/ 533 534 /************************************************************************* 535 * ACPI basic handles 536 */ 537 538 static acpi_handle root_handle; 539 static acpi_handle ec_handle; 540 541 #define TPACPI_HANDLE(object, parent, paths...) \ 542 static acpi_handle object##_handle; \ 543 static const acpi_handle * const object##_parent __initconst = \ 544 &parent##_handle; \ 545 static char *object##_paths[] __initdata = { paths } 546 547 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 548 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 549 550 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 551 /* T4x, X31, X40 */ 552 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 553 "\\CMS", /* R40, R40e */ 554 ); /* all others */ 555 556 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 557 "^HKEY", /* R30, R31 */ 558 "HKEY", /* all others */ 559 ); /* 570 */ 560 561 /************************************************************************* 562 * ACPI helpers 563 */ 564 565 static int acpi_evalf(acpi_handle handle, 566 int *res, char *method, char *fmt, ...) 567 { 568 char *fmt0 = fmt; 569 struct acpi_object_list params; 570 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 571 struct acpi_buffer result, *resultp; 572 union acpi_object out_obj; 573 acpi_status status; 574 va_list ap; 575 char res_type; 576 int success; 577 int quiet; 578 579 if (!*fmt) { 580 pr_err("acpi_evalf() called with empty format\n"); 581 return 0; 582 } 583 584 if (*fmt == 'q') { 585 quiet = 1; 586 fmt++; 587 } else 588 quiet = 0; 589 590 res_type = *(fmt++); 591 592 params.count = 0; 593 params.pointer = &in_objs[0]; 594 595 va_start(ap, fmt); 596 while (*fmt) { 597 char c = *(fmt++); 598 switch (c) { 599 case 'd': /* int */ 600 in_objs[params.count].integer.value = va_arg(ap, int); 601 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 602 break; 603 /* add more types as needed */ 604 default: 605 pr_err("acpi_evalf() called with invalid format character '%c'\n", 606 c); 607 va_end(ap); 608 return 0; 609 } 610 } 611 va_end(ap); 612 613 if (res_type != 'v') { 614 result.length = sizeof(out_obj); 615 result.pointer = &out_obj; 616 resultp = &result; 617 } else 618 resultp = NULL; 619 620 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 621 622 switch (res_type) { 623 case 'd': /* int */ 624 success = (status == AE_OK && 625 out_obj.type == ACPI_TYPE_INTEGER); 626 if (success && res) 627 *res = out_obj.integer.value; 628 break; 629 case 'v': /* void */ 630 success = status == AE_OK; 631 break; 632 /* add more types as needed */ 633 default: 634 pr_err("acpi_evalf() called with invalid format character '%c'\n", 635 res_type); 636 return 0; 637 } 638 639 if (!success && !quiet) 640 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 641 method, fmt0, acpi_format_exception(status)); 642 643 return success; 644 } 645 646 static int acpi_ec_read(int i, u8 *p) 647 { 648 int v; 649 650 if (ecrd_handle) { 651 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 652 return 0; 653 *p = v; 654 } else { 655 if (ec_read(i, p) < 0) 656 return 0; 657 } 658 659 return 1; 660 } 661 662 static int acpi_ec_write(int i, u8 v) 663 { 664 if (ecwr_handle) { 665 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 666 return 0; 667 } else { 668 if (ec_write(i, v) < 0) 669 return 0; 670 } 671 672 return 1; 673 } 674 675 static int issue_thinkpad_cmos_command(int cmos_cmd) 676 { 677 if (!cmos_handle) 678 return -ENXIO; 679 680 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 681 return -EIO; 682 683 return 0; 684 } 685 686 /************************************************************************* 687 * ACPI device model 688 */ 689 690 #define TPACPI_ACPIHANDLE_INIT(object) \ 691 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 692 object##_paths, ARRAY_SIZE(object##_paths)) 693 694 static void __init drv_acpi_handle_init(const char *name, 695 acpi_handle *handle, const acpi_handle parent, 696 char **paths, const int num_paths) 697 { 698 int i; 699 acpi_status status; 700 701 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 702 name); 703 704 for (i = 0; i < num_paths; i++) { 705 status = acpi_get_handle(parent, paths[i], handle); 706 if (ACPI_SUCCESS(status)) { 707 dbg_printk(TPACPI_DBG_INIT, 708 "Found ACPI handle %s for %s\n", 709 paths[i], name); 710 return; 711 } 712 } 713 714 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 715 name); 716 *handle = NULL; 717 } 718 719 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 720 u32 level, void *context, void **return_value) 721 { 722 struct acpi_device *dev; 723 if (!strcmp(context, "video")) { 724 if (acpi_bus_get_device(handle, &dev)) 725 return AE_OK; 726 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 727 return AE_OK; 728 } 729 730 *(acpi_handle *)return_value = handle; 731 732 return AE_CTRL_TERMINATE; 733 } 734 735 static void __init tpacpi_acpi_handle_locate(const char *name, 736 const char *hid, 737 acpi_handle *handle) 738 { 739 acpi_status status; 740 acpi_handle device_found; 741 742 BUG_ON(!name || !handle); 743 vdbg_printk(TPACPI_DBG_INIT, 744 "trying to locate ACPI handle for %s, using HID %s\n", 745 name, hid ? hid : "NULL"); 746 747 memset(&device_found, 0, sizeof(device_found)); 748 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 749 (void *)name, &device_found); 750 751 *handle = NULL; 752 753 if (ACPI_SUCCESS(status)) { 754 *handle = device_found; 755 dbg_printk(TPACPI_DBG_INIT, 756 "Found ACPI handle for %s\n", name); 757 } else { 758 vdbg_printk(TPACPI_DBG_INIT, 759 "Could not locate an ACPI handle for %s: %s\n", 760 name, acpi_format_exception(status)); 761 } 762 } 763 764 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 765 { 766 struct ibm_struct *ibm = data; 767 768 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 769 return; 770 771 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 772 return; 773 774 ibm->acpi->notify(ibm, event); 775 } 776 777 static int __init setup_acpi_notify(struct ibm_struct *ibm) 778 { 779 acpi_status status; 780 int rc; 781 782 BUG_ON(!ibm->acpi); 783 784 if (!*ibm->acpi->handle) 785 return 0; 786 787 vdbg_printk(TPACPI_DBG_INIT, 788 "setting up ACPI notify for %s\n", ibm->name); 789 790 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 791 if (rc < 0) { 792 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 793 return -ENODEV; 794 } 795 796 ibm->acpi->device->driver_data = ibm; 797 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 798 TPACPI_ACPI_EVENT_PREFIX, 799 ibm->name); 800 801 status = acpi_install_notify_handler(*ibm->acpi->handle, 802 ibm->acpi->type, dispatch_acpi_notify, ibm); 803 if (ACPI_FAILURE(status)) { 804 if (status == AE_ALREADY_EXISTS) { 805 pr_notice("another device driver is already handling %s events\n", 806 ibm->name); 807 } else { 808 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 809 ibm->name, acpi_format_exception(status)); 810 } 811 return -ENODEV; 812 } 813 ibm->flags.acpi_notify_installed = 1; 814 return 0; 815 } 816 817 static int __init tpacpi_device_add(struct acpi_device *device) 818 { 819 return 0; 820 } 821 822 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 823 { 824 int rc; 825 826 dbg_printk(TPACPI_DBG_INIT, 827 "registering %s as an ACPI driver\n", ibm->name); 828 829 BUG_ON(!ibm->acpi); 830 831 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 832 if (!ibm->acpi->driver) { 833 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 834 return -ENOMEM; 835 } 836 837 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 838 ibm->acpi->driver->ids = ibm->acpi->hid; 839 840 ibm->acpi->driver->ops.add = &tpacpi_device_add; 841 842 rc = acpi_bus_register_driver(ibm->acpi->driver); 843 if (rc < 0) { 844 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 845 ibm->name, rc); 846 kfree(ibm->acpi->driver); 847 ibm->acpi->driver = NULL; 848 } else if (!rc) 849 ibm->flags.acpi_driver_registered = 1; 850 851 return rc; 852 } 853 854 855 /**************************************************************************** 856 **************************************************************************** 857 * 858 * Procfs Helpers 859 * 860 **************************************************************************** 861 ****************************************************************************/ 862 863 static int dispatch_proc_show(struct seq_file *m, void *v) 864 { 865 struct ibm_struct *ibm = m->private; 866 867 if (!ibm || !ibm->read) 868 return -EINVAL; 869 return ibm->read(m); 870 } 871 872 static int dispatch_proc_open(struct inode *inode, struct file *file) 873 { 874 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 875 } 876 877 static ssize_t dispatch_proc_write(struct file *file, 878 const char __user *userbuf, 879 size_t count, loff_t *pos) 880 { 881 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 882 char *kernbuf; 883 int ret; 884 885 if (!ibm || !ibm->write) 886 return -EINVAL; 887 if (count > PAGE_SIZE - 2) 888 return -EINVAL; 889 890 kernbuf = kmalloc(count + 2, GFP_KERNEL); 891 if (!kernbuf) 892 return -ENOMEM; 893 894 if (copy_from_user(kernbuf, userbuf, count)) { 895 kfree(kernbuf); 896 return -EFAULT; 897 } 898 899 kernbuf[count] = 0; 900 strcat(kernbuf, ","); 901 ret = ibm->write(kernbuf); 902 if (ret == 0) 903 ret = count; 904 905 kfree(kernbuf); 906 907 return ret; 908 } 909 910 static const struct file_operations dispatch_proc_fops = { 911 .owner = THIS_MODULE, 912 .open = dispatch_proc_open, 913 .read = seq_read, 914 .llseek = seq_lseek, 915 .release = single_release, 916 .write = dispatch_proc_write, 917 }; 918 919 static char *next_cmd(char **cmds) 920 { 921 char *start = *cmds; 922 char *end; 923 924 while ((end = strchr(start, ',')) && end == start) 925 start = end + 1; 926 927 if (!end) 928 return NULL; 929 930 *end = 0; 931 *cmds = end + 1; 932 return start; 933 } 934 935 936 /**************************************************************************** 937 **************************************************************************** 938 * 939 * Device model: input, hwmon and platform 940 * 941 **************************************************************************** 942 ****************************************************************************/ 943 944 static struct platform_device *tpacpi_pdev; 945 static struct platform_device *tpacpi_sensors_pdev; 946 static struct device *tpacpi_hwmon; 947 static struct input_dev *tpacpi_inputdev; 948 static struct mutex tpacpi_inputdev_send_mutex; 949 static LIST_HEAD(tpacpi_all_drivers); 950 951 #ifdef CONFIG_PM_SLEEP 952 static int tpacpi_suspend_handler(struct device *dev) 953 { 954 struct ibm_struct *ibm, *itmp; 955 956 list_for_each_entry_safe(ibm, itmp, 957 &tpacpi_all_drivers, 958 all_drivers) { 959 if (ibm->suspend) 960 (ibm->suspend)(); 961 } 962 963 return 0; 964 } 965 966 static int tpacpi_resume_handler(struct device *dev) 967 { 968 struct ibm_struct *ibm, *itmp; 969 970 list_for_each_entry_safe(ibm, itmp, 971 &tpacpi_all_drivers, 972 all_drivers) { 973 if (ibm->resume) 974 (ibm->resume)(); 975 } 976 977 return 0; 978 } 979 #endif 980 981 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 982 tpacpi_suspend_handler, tpacpi_resume_handler); 983 984 static void tpacpi_shutdown_handler(struct platform_device *pdev) 985 { 986 struct ibm_struct *ibm, *itmp; 987 988 list_for_each_entry_safe(ibm, itmp, 989 &tpacpi_all_drivers, 990 all_drivers) { 991 if (ibm->shutdown) 992 (ibm->shutdown)(); 993 } 994 } 995 996 static struct platform_driver tpacpi_pdriver = { 997 .driver = { 998 .name = TPACPI_DRVR_NAME, 999 .pm = &tpacpi_pm, 1000 }, 1001 .shutdown = tpacpi_shutdown_handler, 1002 }; 1003 1004 static struct platform_driver tpacpi_hwmon_pdriver = { 1005 .driver = { 1006 .name = TPACPI_HWMON_DRVR_NAME, 1007 }, 1008 }; 1009 1010 /************************************************************************* 1011 * sysfs support helpers 1012 */ 1013 1014 struct attribute_set { 1015 unsigned int members, max_members; 1016 struct attribute_group group; 1017 }; 1018 1019 struct attribute_set_obj { 1020 struct attribute_set s; 1021 struct attribute *a; 1022 } __attribute__((packed)); 1023 1024 static struct attribute_set *create_attr_set(unsigned int max_members, 1025 const char *name) 1026 { 1027 struct attribute_set_obj *sobj; 1028 1029 if (max_members == 0) 1030 return NULL; 1031 1032 /* Allocates space for implicit NULL at the end too */ 1033 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1034 max_members * sizeof(struct attribute *), 1035 GFP_KERNEL); 1036 if (!sobj) 1037 return NULL; 1038 sobj->s.max_members = max_members; 1039 sobj->s.group.attrs = &sobj->a; 1040 sobj->s.group.name = name; 1041 1042 return &sobj->s; 1043 } 1044 1045 #define destroy_attr_set(_set) \ 1046 kfree(_set); 1047 1048 /* not multi-threaded safe, use it in a single thread per set */ 1049 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1050 { 1051 if (!s || !attr) 1052 return -EINVAL; 1053 1054 if (s->members >= s->max_members) 1055 return -ENOMEM; 1056 1057 s->group.attrs[s->members] = attr; 1058 s->members++; 1059 1060 return 0; 1061 } 1062 1063 static int add_many_to_attr_set(struct attribute_set *s, 1064 struct attribute **attr, 1065 unsigned int count) 1066 { 1067 int i, res; 1068 1069 for (i = 0; i < count; i++) { 1070 res = add_to_attr_set(s, attr[i]); 1071 if (res) 1072 return res; 1073 } 1074 1075 return 0; 1076 } 1077 1078 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1079 { 1080 sysfs_remove_group(kobj, &s->group); 1081 destroy_attr_set(s); 1082 } 1083 1084 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1085 sysfs_create_group(_kobj, &_attr_set->group) 1086 1087 static int parse_strtoul(const char *buf, 1088 unsigned long max, unsigned long *value) 1089 { 1090 char *endp; 1091 1092 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1093 endp = skip_spaces(endp); 1094 if (*endp || *value > max) 1095 return -EINVAL; 1096 1097 return 0; 1098 } 1099 1100 static void tpacpi_disable_brightness_delay(void) 1101 { 1102 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1103 pr_notice("ACPI backlight control delay disabled\n"); 1104 } 1105 1106 static void printk_deprecated_attribute(const char * const what, 1107 const char * const details) 1108 { 1109 tpacpi_log_usertask("deprecated sysfs attribute"); 1110 pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n", 1111 what, details); 1112 } 1113 1114 /************************************************************************* 1115 * rfkill and radio control support helpers 1116 */ 1117 1118 /* 1119 * ThinkPad-ACPI firmware handling model: 1120 * 1121 * WLSW (master wireless switch) is event-driven, and is common to all 1122 * firmware-controlled radios. It cannot be controlled, just monitored, 1123 * as expected. It overrides all radio state in firmware 1124 * 1125 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1126 * (TODO: verify how WLSW interacts with the returned radio state). 1127 * 1128 * The only time there are shadow radio state changes, is when 1129 * masked-off hotkeys are used. 1130 */ 1131 1132 /* 1133 * Internal driver API for radio state: 1134 * 1135 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1136 * bool: true means radio blocked (off) 1137 */ 1138 enum tpacpi_rfkill_state { 1139 TPACPI_RFK_RADIO_OFF = 0, 1140 TPACPI_RFK_RADIO_ON 1141 }; 1142 1143 /* rfkill switches */ 1144 enum tpacpi_rfk_id { 1145 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1146 TPACPI_RFK_WWAN_SW_ID, 1147 TPACPI_RFK_UWB_SW_ID, 1148 TPACPI_RFK_SW_MAX 1149 }; 1150 1151 static const char *tpacpi_rfkill_names[] = { 1152 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1153 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1154 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1155 [TPACPI_RFK_SW_MAX] = NULL 1156 }; 1157 1158 /* ThinkPad-ACPI rfkill subdriver */ 1159 struct tpacpi_rfk { 1160 struct rfkill *rfkill; 1161 enum tpacpi_rfk_id id; 1162 const struct tpacpi_rfk_ops *ops; 1163 }; 1164 1165 struct tpacpi_rfk_ops { 1166 /* firmware interface */ 1167 int (*get_status)(void); 1168 int (*set_status)(const enum tpacpi_rfkill_state); 1169 }; 1170 1171 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1172 1173 /* Query FW and update rfkill sw state for a given rfkill switch */ 1174 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1175 { 1176 int status; 1177 1178 if (!tp_rfk) 1179 return -ENODEV; 1180 1181 status = (tp_rfk->ops->get_status)(); 1182 if (status < 0) 1183 return status; 1184 1185 rfkill_set_sw_state(tp_rfk->rfkill, 1186 (status == TPACPI_RFK_RADIO_OFF)); 1187 1188 return status; 1189 } 1190 1191 /* Query FW and update rfkill sw state for all rfkill switches */ 1192 static void tpacpi_rfk_update_swstate_all(void) 1193 { 1194 unsigned int i; 1195 1196 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1197 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1198 } 1199 1200 /* 1201 * Sync the HW-blocking state of all rfkill switches, 1202 * do notice it causes the rfkill core to schedule uevents 1203 */ 1204 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1205 { 1206 unsigned int i; 1207 struct tpacpi_rfk *tp_rfk; 1208 1209 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1210 tp_rfk = tpacpi_rfkill_switches[i]; 1211 if (tp_rfk) { 1212 if (rfkill_set_hw_state(tp_rfk->rfkill, 1213 blocked)) { 1214 /* ignore -- we track sw block */ 1215 } 1216 } 1217 } 1218 } 1219 1220 /* Call to get the WLSW state from the firmware */ 1221 static int hotkey_get_wlsw(void); 1222 1223 /* Call to query WLSW state and update all rfkill switches */ 1224 static bool tpacpi_rfk_check_hwblock_state(void) 1225 { 1226 int res = hotkey_get_wlsw(); 1227 int hw_blocked; 1228 1229 /* When unknown or unsupported, we have to assume it is unblocked */ 1230 if (res < 0) 1231 return false; 1232 1233 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1234 tpacpi_rfk_update_hwblock_state(hw_blocked); 1235 1236 return hw_blocked; 1237 } 1238 1239 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1240 { 1241 struct tpacpi_rfk *tp_rfk = data; 1242 int res; 1243 1244 dbg_printk(TPACPI_DBG_RFKILL, 1245 "request to change radio state to %s\n", 1246 blocked ? "blocked" : "unblocked"); 1247 1248 /* try to set radio state */ 1249 res = (tp_rfk->ops->set_status)(blocked ? 1250 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1251 1252 /* and update the rfkill core with whatever the FW really did */ 1253 tpacpi_rfk_update_swstate(tp_rfk); 1254 1255 return (res < 0) ? res : 0; 1256 } 1257 1258 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1259 .set_block = tpacpi_rfk_hook_set_block, 1260 }; 1261 1262 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1263 const struct tpacpi_rfk_ops *tp_rfkops, 1264 const enum rfkill_type rfktype, 1265 const char *name, 1266 const bool set_default) 1267 { 1268 struct tpacpi_rfk *atp_rfk; 1269 int res; 1270 bool sw_state = false; 1271 bool hw_state; 1272 int sw_status; 1273 1274 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1275 1276 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1277 if (atp_rfk) 1278 atp_rfk->rfkill = rfkill_alloc(name, 1279 &tpacpi_pdev->dev, 1280 rfktype, 1281 &tpacpi_rfk_rfkill_ops, 1282 atp_rfk); 1283 if (!atp_rfk || !atp_rfk->rfkill) { 1284 pr_err("failed to allocate memory for rfkill class\n"); 1285 kfree(atp_rfk); 1286 return -ENOMEM; 1287 } 1288 1289 atp_rfk->id = id; 1290 atp_rfk->ops = tp_rfkops; 1291 1292 sw_status = (tp_rfkops->get_status)(); 1293 if (sw_status < 0) { 1294 pr_err("failed to read initial state for %s, error %d\n", 1295 name, sw_status); 1296 } else { 1297 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1298 if (set_default) { 1299 /* try to keep the initial state, since we ask the 1300 * firmware to preserve it across S5 in NVRAM */ 1301 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1302 } 1303 } 1304 hw_state = tpacpi_rfk_check_hwblock_state(); 1305 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1306 1307 res = rfkill_register(atp_rfk->rfkill); 1308 if (res < 0) { 1309 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1310 rfkill_destroy(atp_rfk->rfkill); 1311 kfree(atp_rfk); 1312 return res; 1313 } 1314 1315 tpacpi_rfkill_switches[id] = atp_rfk; 1316 1317 pr_info("rfkill switch %s: radio is %sblocked\n", 1318 name, (sw_state || hw_state) ? "" : "un"); 1319 return 0; 1320 } 1321 1322 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1323 { 1324 struct tpacpi_rfk *tp_rfk; 1325 1326 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1327 1328 tp_rfk = tpacpi_rfkill_switches[id]; 1329 if (tp_rfk) { 1330 rfkill_unregister(tp_rfk->rfkill); 1331 rfkill_destroy(tp_rfk->rfkill); 1332 tpacpi_rfkill_switches[id] = NULL; 1333 kfree(tp_rfk); 1334 } 1335 } 1336 1337 static void printk_deprecated_rfkill_attribute(const char * const what) 1338 { 1339 printk_deprecated_attribute(what, 1340 "Please switch to generic rfkill before year 2010"); 1341 } 1342 1343 /* sysfs <radio> enable ------------------------------------------------ */ 1344 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1345 struct device_attribute *attr, 1346 char *buf) 1347 { 1348 int status; 1349 1350 printk_deprecated_rfkill_attribute(attr->attr.name); 1351 1352 /* This is in the ABI... */ 1353 if (tpacpi_rfk_check_hwblock_state()) { 1354 status = TPACPI_RFK_RADIO_OFF; 1355 } else { 1356 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1357 if (status < 0) 1358 return status; 1359 } 1360 1361 return snprintf(buf, PAGE_SIZE, "%d\n", 1362 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1363 } 1364 1365 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1366 struct device_attribute *attr, 1367 const char *buf, size_t count) 1368 { 1369 unsigned long t; 1370 int res; 1371 1372 printk_deprecated_rfkill_attribute(attr->attr.name); 1373 1374 if (parse_strtoul(buf, 1, &t)) 1375 return -EINVAL; 1376 1377 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1378 1379 /* This is in the ABI... */ 1380 if (tpacpi_rfk_check_hwblock_state() && !!t) 1381 return -EPERM; 1382 1383 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1384 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1385 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1386 1387 return (res < 0) ? res : count; 1388 } 1389 1390 /* procfs -------------------------------------------------------------- */ 1391 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1392 { 1393 if (id >= TPACPI_RFK_SW_MAX) 1394 seq_printf(m, "status:\t\tnot supported\n"); 1395 else { 1396 int status; 1397 1398 /* This is in the ABI... */ 1399 if (tpacpi_rfk_check_hwblock_state()) { 1400 status = TPACPI_RFK_RADIO_OFF; 1401 } else { 1402 status = tpacpi_rfk_update_swstate( 1403 tpacpi_rfkill_switches[id]); 1404 if (status < 0) 1405 return status; 1406 } 1407 1408 seq_printf(m, "status:\t\t%s\n", 1409 (status == TPACPI_RFK_RADIO_ON) ? 1410 "enabled" : "disabled"); 1411 seq_printf(m, "commands:\tenable, disable\n"); 1412 } 1413 1414 return 0; 1415 } 1416 1417 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1418 { 1419 char *cmd; 1420 int status = -1; 1421 int res = 0; 1422 1423 if (id >= TPACPI_RFK_SW_MAX) 1424 return -ENODEV; 1425 1426 while ((cmd = next_cmd(&buf))) { 1427 if (strlencmp(cmd, "enable") == 0) 1428 status = TPACPI_RFK_RADIO_ON; 1429 else if (strlencmp(cmd, "disable") == 0) 1430 status = TPACPI_RFK_RADIO_OFF; 1431 else 1432 return -EINVAL; 1433 } 1434 1435 if (status != -1) { 1436 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1437 (status == TPACPI_RFK_RADIO_ON) ? 1438 "enable" : "disable", 1439 tpacpi_rfkill_names[id]); 1440 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1441 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1442 } 1443 1444 return res; 1445 } 1446 1447 /************************************************************************* 1448 * thinkpad-acpi driver attributes 1449 */ 1450 1451 /* interface_version --------------------------------------------------- */ 1452 static ssize_t interface_version_show(struct device_driver *drv, char *buf) 1453 { 1454 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1455 } 1456 static DRIVER_ATTR_RO(interface_version); 1457 1458 /* debug_level --------------------------------------------------------- */ 1459 static ssize_t debug_level_show(struct device_driver *drv, char *buf) 1460 { 1461 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1462 } 1463 1464 static ssize_t debug_level_store(struct device_driver *drv, const char *buf, 1465 size_t count) 1466 { 1467 unsigned long t; 1468 1469 if (parse_strtoul(buf, 0xffff, &t)) 1470 return -EINVAL; 1471 1472 dbg_level = t; 1473 1474 return count; 1475 } 1476 static DRIVER_ATTR_RW(debug_level); 1477 1478 /* version ------------------------------------------------------------- */ 1479 static ssize_t version_show(struct device_driver *drv, char *buf) 1480 { 1481 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1482 TPACPI_DESC, TPACPI_VERSION); 1483 } 1484 static DRIVER_ATTR_RO(version); 1485 1486 /* --------------------------------------------------------------------- */ 1487 1488 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1489 1490 /* wlsw_emulstate ------------------------------------------------------ */ 1491 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf) 1492 { 1493 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1494 } 1495 1496 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf, 1497 size_t count) 1498 { 1499 unsigned long t; 1500 1501 if (parse_strtoul(buf, 1, &t)) 1502 return -EINVAL; 1503 1504 if (tpacpi_wlsw_emulstate != !!t) { 1505 tpacpi_wlsw_emulstate = !!t; 1506 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1507 } 1508 1509 return count; 1510 } 1511 static DRIVER_ATTR_RW(wlsw_emulstate); 1512 1513 /* bluetooth_emulstate ------------------------------------------------- */ 1514 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf) 1515 { 1516 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1517 } 1518 1519 static ssize_t bluetooth_emulstate_store(struct device_driver *drv, 1520 const char *buf, size_t count) 1521 { 1522 unsigned long t; 1523 1524 if (parse_strtoul(buf, 1, &t)) 1525 return -EINVAL; 1526 1527 tpacpi_bluetooth_emulstate = !!t; 1528 1529 return count; 1530 } 1531 static DRIVER_ATTR_RW(bluetooth_emulstate); 1532 1533 /* wwan_emulstate ------------------------------------------------- */ 1534 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf) 1535 { 1536 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1537 } 1538 1539 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf, 1540 size_t count) 1541 { 1542 unsigned long t; 1543 1544 if (parse_strtoul(buf, 1, &t)) 1545 return -EINVAL; 1546 1547 tpacpi_wwan_emulstate = !!t; 1548 1549 return count; 1550 } 1551 static DRIVER_ATTR_RW(wwan_emulstate); 1552 1553 /* uwb_emulstate ------------------------------------------------- */ 1554 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf) 1555 { 1556 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1557 } 1558 1559 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf, 1560 size_t count) 1561 { 1562 unsigned long t; 1563 1564 if (parse_strtoul(buf, 1, &t)) 1565 return -EINVAL; 1566 1567 tpacpi_uwb_emulstate = !!t; 1568 1569 return count; 1570 } 1571 static DRIVER_ATTR_RW(uwb_emulstate); 1572 #endif 1573 1574 /* --------------------------------------------------------------------- */ 1575 1576 static struct driver_attribute *tpacpi_driver_attributes[] = { 1577 &driver_attr_debug_level, &driver_attr_version, 1578 &driver_attr_interface_version, 1579 }; 1580 1581 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1582 { 1583 int i, res; 1584 1585 i = 0; 1586 res = 0; 1587 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1588 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1589 i++; 1590 } 1591 1592 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1593 if (!res && dbg_wlswemul) 1594 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1595 if (!res && dbg_bluetoothemul) 1596 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1597 if (!res && dbg_wwanemul) 1598 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1599 if (!res && dbg_uwbemul) 1600 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1601 #endif 1602 1603 return res; 1604 } 1605 1606 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1607 { 1608 int i; 1609 1610 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1611 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1612 1613 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1614 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1615 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1616 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1617 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1618 #endif 1619 } 1620 1621 /************************************************************************* 1622 * Firmware Data 1623 */ 1624 1625 /* 1626 * Table of recommended minimum BIOS versions 1627 * 1628 * Reasons for listing: 1629 * 1. Stable BIOS, listed because the unknown amount of 1630 * bugs and bad ACPI behaviour on older versions 1631 * 1632 * 2. BIOS or EC fw with known bugs that trigger on Linux 1633 * 1634 * 3. BIOS with known reduced functionality in older versions 1635 * 1636 * We recommend the latest BIOS and EC version. 1637 * We only support the latest BIOS and EC fw version as a rule. 1638 * 1639 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1640 * Information from users in ThinkWiki 1641 * 1642 * WARNING: we use this table also to detect that the machine is 1643 * a ThinkPad in some cases, so don't remove entries lightly. 1644 */ 1645 1646 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1647 { .vendor = (__v), \ 1648 .bios = TPID(__id1, __id2), \ 1649 .ec = TPACPI_MATCH_ANY, \ 1650 .quirks = TPACPI_MATCH_ANY << 16 \ 1651 | (__bv1) << 8 | (__bv2) } 1652 1653 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1654 __eid, __ev1, __ev2) \ 1655 { .vendor = (__v), \ 1656 .bios = TPID(__bid1, __bid2), \ 1657 .ec = __eid, \ 1658 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1659 | (__bv1) << 8 | (__bv2) } 1660 1661 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1662 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1663 1664 /* Outdated IBM BIOSes often lack the EC id string */ 1665 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1666 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1667 __bv1, __bv2, TPID(__id1, __id2), \ 1668 __ev1, __ev2), \ 1669 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1670 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1671 __ev1, __ev2) 1672 1673 /* Outdated IBM BIOSes often lack the EC id string */ 1674 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1675 __eid1, __eid2, __ev1, __ev2) \ 1676 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1677 __bv1, __bv2, TPID(__eid1, __eid2), \ 1678 __ev1, __ev2), \ 1679 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1680 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1681 __ev1, __ev2) 1682 1683 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1684 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1685 1686 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1687 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1688 __bv1, __bv2, TPID(__id1, __id2), \ 1689 __ev1, __ev2) 1690 1691 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1692 __eid1, __eid2, __ev1, __ev2) \ 1693 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1694 __bv1, __bv2, TPID(__eid1, __eid2), \ 1695 __ev1, __ev2) 1696 1697 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1698 /* Numeric models ------------------ */ 1699 /* FW MODEL BIOS VERS */ 1700 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1701 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1702 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1703 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1704 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1705 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1706 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1707 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1708 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1709 1710 /* A-series ------------------------- */ 1711 /* FW MODEL BIOS VERS EC VERS */ 1712 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1713 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1714 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1715 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1716 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1717 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1718 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1719 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1720 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1721 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1722 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1723 1724 /* G-series ------------------------- */ 1725 /* FW MODEL BIOS VERS */ 1726 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1727 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1728 1729 /* R-series, T-series --------------- */ 1730 /* FW MODEL BIOS VERS EC VERS */ 1731 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1732 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1733 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1734 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1735 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1736 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1737 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1738 T40/p, T41/p, T42/p (1) */ 1739 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1740 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1741 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1742 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1743 1744 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1745 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1746 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1747 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1748 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1749 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1750 1751 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1752 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1753 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1754 1755 /* BIOS FW BIOS VERS EC FW EC VERS */ 1756 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1757 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1758 1759 /* X-series ------------------------- */ 1760 /* FW MODEL BIOS VERS EC VERS */ 1761 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1762 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1763 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1764 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1765 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1766 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1767 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1768 1769 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1770 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1771 1772 /* (0) - older versions lack DMI EC fw string and functionality */ 1773 /* (1) - older versions known to lack functionality */ 1774 }; 1775 1776 #undef TPV_QL1 1777 #undef TPV_QL0 1778 #undef TPV_QI2 1779 #undef TPV_QI1 1780 #undef TPV_QI0 1781 #undef TPV_Q_X 1782 #undef TPV_Q 1783 1784 static void __init tpacpi_check_outdated_fw(void) 1785 { 1786 unsigned long fwvers; 1787 u16 ec_version, bios_version; 1788 1789 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1790 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1791 1792 if (!fwvers) 1793 return; 1794 1795 bios_version = fwvers & 0xffffU; 1796 ec_version = (fwvers >> 16) & 0xffffU; 1797 1798 /* note that unknown versions are set to 0x0000 and we use that */ 1799 if ((bios_version > thinkpad_id.bios_release) || 1800 (ec_version > thinkpad_id.ec_release && 1801 ec_version != TPACPI_MATCH_ANY)) { 1802 /* 1803 * The changelogs would let us track down the exact 1804 * reason, but it is just too much of a pain to track 1805 * it. We only list BIOSes that are either really 1806 * broken, or really stable to begin with, so it is 1807 * best if the user upgrades the firmware anyway. 1808 */ 1809 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1810 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n"); 1811 } 1812 } 1813 1814 static bool __init tpacpi_is_fw_known(void) 1815 { 1816 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1817 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1818 } 1819 1820 /**************************************************************************** 1821 **************************************************************************** 1822 * 1823 * Subdrivers 1824 * 1825 **************************************************************************** 1826 ****************************************************************************/ 1827 1828 /************************************************************************* 1829 * thinkpad-acpi metadata subdriver 1830 */ 1831 1832 static int thinkpad_acpi_driver_read(struct seq_file *m) 1833 { 1834 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1835 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1836 return 0; 1837 } 1838 1839 static struct ibm_struct thinkpad_acpi_driver_data = { 1840 .name = "driver", 1841 .read = thinkpad_acpi_driver_read, 1842 }; 1843 1844 /************************************************************************* 1845 * Hotkey subdriver 1846 */ 1847 1848 /* 1849 * ThinkPad firmware event model 1850 * 1851 * The ThinkPad firmware has two main event interfaces: normal ACPI 1852 * notifications (which follow the ACPI standard), and a private event 1853 * interface. 1854 * 1855 * The private event interface also issues events for the hotkeys. As 1856 * the driver gained features, the event handling code ended up being 1857 * built around the hotkey subdriver. This will need to be refactored 1858 * to a more formal event API eventually. 1859 * 1860 * Some "hotkeys" are actually supposed to be used as event reports, 1861 * such as "brightness has changed", "volume has changed", depending on 1862 * the ThinkPad model and how the firmware is operating. 1863 * 1864 * Unlike other classes, hotkey-class events have mask/unmask control on 1865 * non-ancient firmware. However, how it behaves changes a lot with the 1866 * firmware model and version. 1867 */ 1868 1869 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1870 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1871 TP_ACPI_HOTKEYSCAN_FNF2, 1872 TP_ACPI_HOTKEYSCAN_FNF3, 1873 TP_ACPI_HOTKEYSCAN_FNF4, 1874 TP_ACPI_HOTKEYSCAN_FNF5, 1875 TP_ACPI_HOTKEYSCAN_FNF6, 1876 TP_ACPI_HOTKEYSCAN_FNF7, 1877 TP_ACPI_HOTKEYSCAN_FNF8, 1878 TP_ACPI_HOTKEYSCAN_FNF9, 1879 TP_ACPI_HOTKEYSCAN_FNF10, 1880 TP_ACPI_HOTKEYSCAN_FNF11, 1881 TP_ACPI_HOTKEYSCAN_FNF12, 1882 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1883 TP_ACPI_HOTKEYSCAN_FNINSERT, 1884 TP_ACPI_HOTKEYSCAN_FNDELETE, 1885 TP_ACPI_HOTKEYSCAN_FNHOME, 1886 TP_ACPI_HOTKEYSCAN_FNEND, 1887 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1888 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1889 TP_ACPI_HOTKEYSCAN_FNSPACE, 1890 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1891 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1892 TP_ACPI_HOTKEYSCAN_MUTE, 1893 TP_ACPI_HOTKEYSCAN_THINKPAD, 1894 TP_ACPI_HOTKEYSCAN_UNK1, 1895 TP_ACPI_HOTKEYSCAN_UNK2, 1896 TP_ACPI_HOTKEYSCAN_UNK3, 1897 TP_ACPI_HOTKEYSCAN_UNK4, 1898 TP_ACPI_HOTKEYSCAN_UNK5, 1899 TP_ACPI_HOTKEYSCAN_UNK6, 1900 TP_ACPI_HOTKEYSCAN_UNK7, 1901 TP_ACPI_HOTKEYSCAN_UNK8, 1902 1903 /* Adaptive keyboard keycodes */ 1904 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1905 TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1906 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1907 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1908 TP_ACPI_HOTKEYSCAN_CLOUD, 1909 TP_ACPI_HOTKEYSCAN_UNK9, 1910 TP_ACPI_HOTKEYSCAN_VOICE, 1911 TP_ACPI_HOTKEYSCAN_UNK10, 1912 TP_ACPI_HOTKEYSCAN_GESTURES, 1913 TP_ACPI_HOTKEYSCAN_UNK11, 1914 TP_ACPI_HOTKEYSCAN_UNK12, 1915 TP_ACPI_HOTKEYSCAN_UNK13, 1916 TP_ACPI_HOTKEYSCAN_CONFIG, 1917 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1918 TP_ACPI_HOTKEYSCAN_RELOAD, 1919 TP_ACPI_HOTKEYSCAN_BACK, 1920 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1921 TP_ACPI_HOTKEYSCAN_MIC_UP, 1922 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1923 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1924 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1925 1926 /* Lenovo extended keymap, starting at 0x1300 */ 1927 TP_ACPI_HOTKEYSCAN_EXTENDED_START, 1928 /* first new observed key (star, favorites) is 0x1311 */ 1929 TP_ACPI_HOTKEYSCAN_STAR = 69, 1930 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2, 1931 TP_ACPI_HOTKEYSCAN_UNK25, 1932 TP_ACPI_HOTKEYSCAN_BLUETOOTH, 1933 TP_ACPI_HOTKEYSCAN_KEYBOARD, 1934 1935 /* Hotkey keymap size */ 1936 TPACPI_HOTKEY_MAP_LEN 1937 }; 1938 1939 enum { /* Keys/events available through NVRAM polling */ 1940 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1941 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1942 }; 1943 1944 enum { /* Positions of some of the keys in hotkey masks */ 1945 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1946 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1947 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1948 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1949 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1950 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1951 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1952 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1953 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1954 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1955 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1956 }; 1957 1958 enum { /* NVRAM to ACPI HKEY group map */ 1959 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1960 TP_ACPI_HKEY_ZOOM_MASK | 1961 TP_ACPI_HKEY_DISPSWTCH_MASK | 1962 TP_ACPI_HKEY_HIBERNATE_MASK, 1963 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1964 TP_ACPI_HKEY_BRGHTDWN_MASK, 1965 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1966 TP_ACPI_HKEY_VOLDWN_MASK | 1967 TP_ACPI_HKEY_MUTE_MASK, 1968 }; 1969 1970 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1971 struct tp_nvram_state { 1972 u16 thinkpad_toggle:1; 1973 u16 zoom_toggle:1; 1974 u16 display_toggle:1; 1975 u16 thinklight_toggle:1; 1976 u16 hibernate_toggle:1; 1977 u16 displayexp_toggle:1; 1978 u16 display_state:1; 1979 u16 brightness_toggle:1; 1980 u16 volume_toggle:1; 1981 u16 mute:1; 1982 1983 u8 brightness_level; 1984 u8 volume_level; 1985 }; 1986 1987 /* kthread for the hotkey poller */ 1988 static struct task_struct *tpacpi_hotkey_task; 1989 1990 /* 1991 * Acquire mutex to write poller control variables as an 1992 * atomic block. 1993 * 1994 * Increment hotkey_config_change when changing them if you 1995 * want the kthread to forget old state. 1996 * 1997 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1998 */ 1999 static struct mutex hotkey_thread_data_mutex; 2000 static unsigned int hotkey_config_change; 2001 2002 /* 2003 * hotkey poller control variables 2004 * 2005 * Must be atomic or readers will also need to acquire mutex 2006 * 2007 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2008 * should be used only when the changes need to be taken as 2009 * a block, OR when one needs to force the kthread to forget 2010 * old state. 2011 */ 2012 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2013 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2014 2015 #define HOTKEY_CONFIG_CRITICAL_START \ 2016 do { \ 2017 mutex_lock(&hotkey_thread_data_mutex); \ 2018 hotkey_config_change++; \ 2019 } while (0); 2020 #define HOTKEY_CONFIG_CRITICAL_END \ 2021 mutex_unlock(&hotkey_thread_data_mutex); 2022 2023 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2024 2025 #define hotkey_source_mask 0U 2026 #define HOTKEY_CONFIG_CRITICAL_START 2027 #define HOTKEY_CONFIG_CRITICAL_END 2028 2029 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2030 2031 static struct mutex hotkey_mutex; 2032 2033 static enum { /* Reasons for waking up */ 2034 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2035 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2036 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2037 } hotkey_wakeup_reason; 2038 2039 static int hotkey_autosleep_ack; 2040 2041 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2042 static u32 hotkey_all_mask; /* all events supported in fw */ 2043 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */ 2044 static u32 hotkey_reserved_mask; /* events better left disabled */ 2045 static u32 hotkey_driver_mask; /* events needed by the driver */ 2046 static u32 hotkey_user_mask; /* events visible to userspace */ 2047 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2048 2049 static u16 *hotkey_keycode_map; 2050 2051 static struct attribute_set *hotkey_dev_attributes; 2052 2053 static void tpacpi_driver_event(const unsigned int hkey_event); 2054 static void hotkey_driver_event(const unsigned int scancode); 2055 static void hotkey_poll_setup(const bool may_warn); 2056 2057 /* HKEY.MHKG() return bits */ 2058 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2059 enum { 2060 TP_ACPI_MULTI_MODE_INVALID = 0, 2061 TP_ACPI_MULTI_MODE_UNKNOWN = 1 << 0, 2062 TP_ACPI_MULTI_MODE_LAPTOP = 1 << 1, 2063 TP_ACPI_MULTI_MODE_TABLET = 1 << 2, 2064 TP_ACPI_MULTI_MODE_FLAT = 1 << 3, 2065 TP_ACPI_MULTI_MODE_STAND = 1 << 4, 2066 TP_ACPI_MULTI_MODE_TENT = 1 << 5, 2067 TP_ACPI_MULTI_MODE_STAND_TENT = 1 << 6, 2068 }; 2069 2070 enum { 2071 /* The following modes are considered tablet mode for the purpose of 2072 * reporting the status to userspace. i.e. in all these modes it makes 2073 * sense to disable the laptop input devices such as touchpad and 2074 * keyboard. 2075 */ 2076 TP_ACPI_MULTI_MODE_TABLET_LIKE = TP_ACPI_MULTI_MODE_TABLET | 2077 TP_ACPI_MULTI_MODE_STAND | 2078 TP_ACPI_MULTI_MODE_TENT | 2079 TP_ACPI_MULTI_MODE_STAND_TENT, 2080 }; 2081 2082 static int hotkey_get_wlsw(void) 2083 { 2084 int status; 2085 2086 if (!tp_features.hotkey_wlsw) 2087 return -ENODEV; 2088 2089 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2090 if (dbg_wlswemul) 2091 return (tpacpi_wlsw_emulstate) ? 2092 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2093 #endif 2094 2095 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2096 return -EIO; 2097 2098 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2099 } 2100 2101 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode) 2102 { 2103 int type = (s >> 16) & 0xffff; 2104 int value = s & 0xffff; 2105 int mode = TP_ACPI_MULTI_MODE_INVALID; 2106 int valid_modes = 0; 2107 2108 if (has_tablet_mode) 2109 *has_tablet_mode = 0; 2110 2111 switch (type) { 2112 case 1: 2113 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2114 TP_ACPI_MULTI_MODE_TABLET | 2115 TP_ACPI_MULTI_MODE_STAND_TENT; 2116 break; 2117 case 2: 2118 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2119 TP_ACPI_MULTI_MODE_FLAT | 2120 TP_ACPI_MULTI_MODE_TABLET | 2121 TP_ACPI_MULTI_MODE_STAND | 2122 TP_ACPI_MULTI_MODE_TENT; 2123 break; 2124 case 3: 2125 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2126 TP_ACPI_MULTI_MODE_FLAT; 2127 break; 2128 case 4: 2129 case 5: 2130 /* In mode 4, FLAT is not specified as a valid mode. However, 2131 * it can be seen at least on the X1 Yoga 2nd Generation. 2132 */ 2133 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2134 TP_ACPI_MULTI_MODE_FLAT | 2135 TP_ACPI_MULTI_MODE_TABLET | 2136 TP_ACPI_MULTI_MODE_STAND | 2137 TP_ACPI_MULTI_MODE_TENT; 2138 break; 2139 default: 2140 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n", 2141 type, value, TPACPI_MAIL); 2142 return 0; 2143 } 2144 2145 if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE)) 2146 *has_tablet_mode = 1; 2147 2148 switch (value) { 2149 case 1: 2150 mode = TP_ACPI_MULTI_MODE_LAPTOP; 2151 break; 2152 case 2: 2153 mode = TP_ACPI_MULTI_MODE_FLAT; 2154 break; 2155 case 3: 2156 mode = TP_ACPI_MULTI_MODE_TABLET; 2157 break; 2158 case 4: 2159 if (type == 1) 2160 mode = TP_ACPI_MULTI_MODE_STAND_TENT; 2161 else 2162 mode = TP_ACPI_MULTI_MODE_STAND; 2163 break; 2164 case 5: 2165 mode = TP_ACPI_MULTI_MODE_TENT; 2166 break; 2167 default: 2168 if (type == 5 && value == 0xffff) { 2169 pr_warn("Multi mode status is undetected, assuming laptop\n"); 2170 return 0; 2171 } 2172 } 2173 2174 if (!(mode & valid_modes)) { 2175 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n", 2176 value, type, TPACPI_MAIL); 2177 return 0; 2178 } 2179 2180 return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE); 2181 } 2182 2183 static int hotkey_get_tablet_mode(int *status) 2184 { 2185 int s; 2186 2187 switch (tp_features.hotkey_tablet) { 2188 case TP_HOTKEY_TABLET_USES_MHKG: 2189 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2190 return -EIO; 2191 2192 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2193 break; 2194 case TP_HOTKEY_TABLET_USES_GMMS: 2195 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0)) 2196 return -EIO; 2197 2198 *status = hotkey_gmms_get_tablet_mode(s, NULL); 2199 break; 2200 default: 2201 break; 2202 } 2203 2204 return 0; 2205 } 2206 2207 /* 2208 * Reads current event mask from firmware, and updates 2209 * hotkey_acpi_mask accordingly. Also resets any bits 2210 * from hotkey_user_mask that are unavailable to be 2211 * delivered (shadow requirement of the userspace ABI). 2212 * 2213 * Call with hotkey_mutex held 2214 */ 2215 static int hotkey_mask_get(void) 2216 { 2217 if (tp_features.hotkey_mask) { 2218 u32 m = 0; 2219 2220 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2221 return -EIO; 2222 2223 hotkey_acpi_mask = m; 2224 } else { 2225 /* no mask support doesn't mean no event support... */ 2226 hotkey_acpi_mask = hotkey_all_mask; 2227 } 2228 2229 /* sync userspace-visible mask */ 2230 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2231 2232 return 0; 2233 } 2234 2235 static void hotkey_mask_warn_incomplete_mask(void) 2236 { 2237 /* log only what the user can fix... */ 2238 const u32 wantedmask = hotkey_driver_mask & 2239 ~(hotkey_acpi_mask | hotkey_source_mask) & 2240 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2241 2242 if (wantedmask) 2243 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2244 } 2245 2246 /* 2247 * Set the firmware mask when supported 2248 * 2249 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2250 * 2251 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2252 * 2253 * Call with hotkey_mutex held 2254 */ 2255 static int hotkey_mask_set(u32 mask) 2256 { 2257 int i; 2258 int rc = 0; 2259 2260 const u32 fwmask = mask & ~hotkey_source_mask; 2261 2262 if (tp_features.hotkey_mask) { 2263 for (i = 0; i < 32; i++) { 2264 if (!acpi_evalf(hkey_handle, 2265 NULL, "MHKM", "vdd", i + 1, 2266 !!(mask & (1 << i)))) { 2267 rc = -EIO; 2268 break; 2269 } 2270 } 2271 } 2272 2273 /* 2274 * We *must* make an inconditional call to hotkey_mask_get to 2275 * refresh hotkey_acpi_mask and update hotkey_user_mask 2276 * 2277 * Take the opportunity to also log when we cannot _enable_ 2278 * a given event. 2279 */ 2280 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2281 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n", 2282 fwmask, hotkey_acpi_mask); 2283 } 2284 2285 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2286 hotkey_mask_warn_incomplete_mask(); 2287 2288 return rc; 2289 } 2290 2291 /* 2292 * Sets hotkey_user_mask and tries to set the firmware mask 2293 * 2294 * Call with hotkey_mutex held 2295 */ 2296 static int hotkey_user_mask_set(const u32 mask) 2297 { 2298 int rc; 2299 2300 /* Give people a chance to notice they are doing something that 2301 * is bound to go boom on their users sooner or later */ 2302 if (!tp_warned.hotkey_mask_ff && 2303 (mask == 0xffff || mask == 0xffffff || 2304 mask == 0xffffffff)) { 2305 tp_warned.hotkey_mask_ff = 1; 2306 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n", 2307 mask); 2308 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n"); 2309 } 2310 2311 /* Try to enable what the user asked for, plus whatever we need. 2312 * this syncs everything but won't enable bits in hotkey_user_mask */ 2313 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2314 2315 /* Enable the available bits in hotkey_user_mask */ 2316 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2317 2318 return rc; 2319 } 2320 2321 /* 2322 * Sets the driver hotkey mask. 2323 * 2324 * Can be called even if the hotkey subdriver is inactive 2325 */ 2326 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2327 { 2328 int rc; 2329 2330 /* Do the right thing if hotkey_init has not been called yet */ 2331 if (!tp_features.hotkey) { 2332 hotkey_driver_mask = mask; 2333 return 0; 2334 } 2335 2336 mutex_lock(&hotkey_mutex); 2337 2338 HOTKEY_CONFIG_CRITICAL_START 2339 hotkey_driver_mask = mask; 2340 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2341 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2342 #endif 2343 HOTKEY_CONFIG_CRITICAL_END 2344 2345 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2346 ~hotkey_source_mask); 2347 hotkey_poll_setup(true); 2348 2349 mutex_unlock(&hotkey_mutex); 2350 2351 return rc; 2352 } 2353 2354 static int hotkey_status_get(int *status) 2355 { 2356 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2357 return -EIO; 2358 2359 return 0; 2360 } 2361 2362 static int hotkey_status_set(bool enable) 2363 { 2364 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2365 return -EIO; 2366 2367 return 0; 2368 } 2369 2370 static void tpacpi_input_send_tabletsw(void) 2371 { 2372 int state; 2373 2374 if (tp_features.hotkey_tablet && 2375 !hotkey_get_tablet_mode(&state)) { 2376 mutex_lock(&tpacpi_inputdev_send_mutex); 2377 2378 input_report_switch(tpacpi_inputdev, 2379 SW_TABLET_MODE, !!state); 2380 input_sync(tpacpi_inputdev); 2381 2382 mutex_unlock(&tpacpi_inputdev_send_mutex); 2383 } 2384 } 2385 2386 /* Do NOT call without validating scancode first */ 2387 static void tpacpi_input_send_key(const unsigned int scancode) 2388 { 2389 const unsigned int keycode = hotkey_keycode_map[scancode]; 2390 2391 if (keycode != KEY_RESERVED) { 2392 mutex_lock(&tpacpi_inputdev_send_mutex); 2393 2394 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2395 input_report_key(tpacpi_inputdev, keycode, 1); 2396 input_sync(tpacpi_inputdev); 2397 2398 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2399 input_report_key(tpacpi_inputdev, keycode, 0); 2400 input_sync(tpacpi_inputdev); 2401 2402 mutex_unlock(&tpacpi_inputdev_send_mutex); 2403 } 2404 } 2405 2406 /* Do NOT call without validating scancode first */ 2407 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2408 { 2409 hotkey_driver_event(scancode); 2410 if (hotkey_user_mask & (1 << scancode)) 2411 tpacpi_input_send_key(scancode); 2412 } 2413 2414 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2415 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2416 2417 /* Do NOT call without validating scancode first */ 2418 static void tpacpi_hotkey_send_key(unsigned int scancode) 2419 { 2420 tpacpi_input_send_key_masked(scancode); 2421 } 2422 2423 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2424 { 2425 u8 d; 2426 2427 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2428 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2429 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2430 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2431 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2432 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2433 } 2434 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) { 2435 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2436 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2437 } 2438 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2439 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2440 n->displayexp_toggle = 2441 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2442 } 2443 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2444 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2445 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2446 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2447 n->brightness_toggle = 2448 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2449 } 2450 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2451 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2452 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2453 >> TP_NVRAM_POS_LEVEL_VOLUME; 2454 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2455 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2456 } 2457 } 2458 2459 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2460 do { \ 2461 if ((event_mask & (1 << __scancode)) && \ 2462 oldn->__member != newn->__member) \ 2463 tpacpi_hotkey_send_key(__scancode); \ 2464 } while (0) 2465 2466 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2467 do { \ 2468 if (event_mask & (1 << __scancode)) \ 2469 tpacpi_hotkey_send_key(__scancode); \ 2470 } while (0) 2471 2472 static void issue_volchange(const unsigned int oldvol, 2473 const unsigned int newvol, 2474 const u32 event_mask) 2475 { 2476 unsigned int i = oldvol; 2477 2478 while (i > newvol) { 2479 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2480 i--; 2481 } 2482 while (i < newvol) { 2483 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2484 i++; 2485 } 2486 } 2487 2488 static void issue_brightnesschange(const unsigned int oldbrt, 2489 const unsigned int newbrt, 2490 const u32 event_mask) 2491 { 2492 unsigned int i = oldbrt; 2493 2494 while (i > newbrt) { 2495 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2496 i--; 2497 } 2498 while (i < newbrt) { 2499 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2500 i++; 2501 } 2502 } 2503 2504 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2505 struct tp_nvram_state *newn, 2506 const u32 event_mask) 2507 { 2508 2509 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2510 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2511 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2512 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2513 2514 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2515 2516 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2517 2518 /* 2519 * Handle volume 2520 * 2521 * This code is supposed to duplicate the IBM firmware behaviour: 2522 * - Pressing MUTE issues mute hotkey message, even when already mute 2523 * - Pressing Volume up/down issues volume up/down hotkey messages, 2524 * even when already at maximum or minimum volume 2525 * - The act of unmuting issues volume up/down notification, 2526 * depending which key was used to unmute 2527 * 2528 * We are constrained to what the NVRAM can tell us, which is not much 2529 * and certainly not enough if more than one volume hotkey was pressed 2530 * since the last poll cycle. 2531 * 2532 * Just to make our life interesting, some newer Lenovo ThinkPads have 2533 * bugs in the BIOS and may fail to update volume_toggle properly. 2534 */ 2535 if (newn->mute) { 2536 /* muted */ 2537 if (!oldn->mute || 2538 oldn->volume_toggle != newn->volume_toggle || 2539 oldn->volume_level != newn->volume_level) { 2540 /* recently muted, or repeated mute keypress, or 2541 * multiple presses ending in mute */ 2542 issue_volchange(oldn->volume_level, newn->volume_level, 2543 event_mask); 2544 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2545 } 2546 } else { 2547 /* unmute */ 2548 if (oldn->mute) { 2549 /* recently unmuted, issue 'unmute' keypress */ 2550 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2551 } 2552 if (oldn->volume_level != newn->volume_level) { 2553 issue_volchange(oldn->volume_level, newn->volume_level, 2554 event_mask); 2555 } else if (oldn->volume_toggle != newn->volume_toggle) { 2556 /* repeated vol up/down keypress at end of scale ? */ 2557 if (newn->volume_level == 0) 2558 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2559 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2560 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2561 } 2562 } 2563 2564 /* handle brightness */ 2565 if (oldn->brightness_level != newn->brightness_level) { 2566 issue_brightnesschange(oldn->brightness_level, 2567 newn->brightness_level, event_mask); 2568 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2569 /* repeated key presses that didn't change state */ 2570 if (newn->brightness_level == 0) 2571 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2572 else if (newn->brightness_level >= bright_maxlvl 2573 && !tp_features.bright_unkfw) 2574 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2575 } 2576 2577 #undef TPACPI_COMPARE_KEY 2578 #undef TPACPI_MAY_SEND_KEY 2579 } 2580 2581 /* 2582 * Polling driver 2583 * 2584 * We track all events in hotkey_source_mask all the time, since 2585 * most of them are edge-based. We only issue those requested by 2586 * hotkey_user_mask or hotkey_driver_mask, though. 2587 */ 2588 static int hotkey_kthread(void *data) 2589 { 2590 struct tp_nvram_state s[2]; 2591 u32 poll_mask, event_mask; 2592 unsigned int si, so; 2593 unsigned long t; 2594 unsigned int change_detector; 2595 unsigned int poll_freq; 2596 bool was_frozen; 2597 2598 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2599 goto exit; 2600 2601 set_freezable(); 2602 2603 so = 0; 2604 si = 1; 2605 t = 0; 2606 2607 /* Initial state for compares */ 2608 mutex_lock(&hotkey_thread_data_mutex); 2609 change_detector = hotkey_config_change; 2610 poll_mask = hotkey_source_mask; 2611 event_mask = hotkey_source_mask & 2612 (hotkey_driver_mask | hotkey_user_mask); 2613 poll_freq = hotkey_poll_freq; 2614 mutex_unlock(&hotkey_thread_data_mutex); 2615 hotkey_read_nvram(&s[so], poll_mask); 2616 2617 while (!kthread_should_stop()) { 2618 if (t == 0) { 2619 if (likely(poll_freq)) 2620 t = 1000/poll_freq; 2621 else 2622 t = 100; /* should never happen... */ 2623 } 2624 t = msleep_interruptible(t); 2625 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2626 break; 2627 2628 if (t > 0 && !was_frozen) 2629 continue; 2630 2631 mutex_lock(&hotkey_thread_data_mutex); 2632 if (was_frozen || hotkey_config_change != change_detector) { 2633 /* forget old state on thaw or config change */ 2634 si = so; 2635 t = 0; 2636 change_detector = hotkey_config_change; 2637 } 2638 poll_mask = hotkey_source_mask; 2639 event_mask = hotkey_source_mask & 2640 (hotkey_driver_mask | hotkey_user_mask); 2641 poll_freq = hotkey_poll_freq; 2642 mutex_unlock(&hotkey_thread_data_mutex); 2643 2644 if (likely(poll_mask)) { 2645 hotkey_read_nvram(&s[si], poll_mask); 2646 if (likely(si != so)) { 2647 hotkey_compare_and_issue_event(&s[so], &s[si], 2648 event_mask); 2649 } 2650 } 2651 2652 so = si; 2653 si ^= 1; 2654 } 2655 2656 exit: 2657 return 0; 2658 } 2659 2660 /* call with hotkey_mutex held */ 2661 static void hotkey_poll_stop_sync(void) 2662 { 2663 if (tpacpi_hotkey_task) { 2664 kthread_stop(tpacpi_hotkey_task); 2665 tpacpi_hotkey_task = NULL; 2666 } 2667 } 2668 2669 /* call with hotkey_mutex held */ 2670 static void hotkey_poll_setup(const bool may_warn) 2671 { 2672 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2673 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2674 2675 if (hotkey_poll_freq > 0 && 2676 (poll_driver_mask || 2677 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2678 if (!tpacpi_hotkey_task) { 2679 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2680 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2681 if (IS_ERR(tpacpi_hotkey_task)) { 2682 tpacpi_hotkey_task = NULL; 2683 pr_err("could not create kernel thread for hotkey polling\n"); 2684 } 2685 } 2686 } else { 2687 hotkey_poll_stop_sync(); 2688 if (may_warn && (poll_driver_mask || poll_user_mask) && 2689 hotkey_poll_freq == 0) { 2690 pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n", 2691 poll_user_mask, poll_driver_mask); 2692 } 2693 } 2694 } 2695 2696 static void hotkey_poll_setup_safe(const bool may_warn) 2697 { 2698 mutex_lock(&hotkey_mutex); 2699 hotkey_poll_setup(may_warn); 2700 mutex_unlock(&hotkey_mutex); 2701 } 2702 2703 /* call with hotkey_mutex held */ 2704 static void hotkey_poll_set_freq(unsigned int freq) 2705 { 2706 if (!freq) 2707 hotkey_poll_stop_sync(); 2708 2709 hotkey_poll_freq = freq; 2710 } 2711 2712 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2713 2714 static void hotkey_poll_setup(const bool __unused) 2715 { 2716 } 2717 2718 static void hotkey_poll_setup_safe(const bool __unused) 2719 { 2720 } 2721 2722 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2723 2724 static int hotkey_inputdev_open(struct input_dev *dev) 2725 { 2726 switch (tpacpi_lifecycle) { 2727 case TPACPI_LIFE_INIT: 2728 case TPACPI_LIFE_RUNNING: 2729 hotkey_poll_setup_safe(false); 2730 return 0; 2731 case TPACPI_LIFE_EXITING: 2732 return -EBUSY; 2733 } 2734 2735 /* Should only happen if tpacpi_lifecycle is corrupt */ 2736 BUG(); 2737 return -EBUSY; 2738 } 2739 2740 static void hotkey_inputdev_close(struct input_dev *dev) 2741 { 2742 /* disable hotkey polling when possible */ 2743 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2744 !(hotkey_source_mask & hotkey_driver_mask)) 2745 hotkey_poll_setup_safe(false); 2746 } 2747 2748 /* sysfs hotkey enable ------------------------------------------------- */ 2749 static ssize_t hotkey_enable_show(struct device *dev, 2750 struct device_attribute *attr, 2751 char *buf) 2752 { 2753 int res, status; 2754 2755 printk_deprecated_attribute("hotkey_enable", 2756 "Hotkey reporting is always enabled"); 2757 2758 res = hotkey_status_get(&status); 2759 if (res) 2760 return res; 2761 2762 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2763 } 2764 2765 static ssize_t hotkey_enable_store(struct device *dev, 2766 struct device_attribute *attr, 2767 const char *buf, size_t count) 2768 { 2769 unsigned long t; 2770 2771 printk_deprecated_attribute("hotkey_enable", 2772 "Hotkeys can be disabled through hotkey_mask"); 2773 2774 if (parse_strtoul(buf, 1, &t)) 2775 return -EINVAL; 2776 2777 if (t == 0) 2778 return -EPERM; 2779 2780 return count; 2781 } 2782 2783 static DEVICE_ATTR_RW(hotkey_enable); 2784 2785 /* sysfs hotkey mask --------------------------------------------------- */ 2786 static ssize_t hotkey_mask_show(struct device *dev, 2787 struct device_attribute *attr, 2788 char *buf) 2789 { 2790 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2791 } 2792 2793 static ssize_t hotkey_mask_store(struct device *dev, 2794 struct device_attribute *attr, 2795 const char *buf, size_t count) 2796 { 2797 unsigned long t; 2798 int res; 2799 2800 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2801 return -EINVAL; 2802 2803 if (mutex_lock_killable(&hotkey_mutex)) 2804 return -ERESTARTSYS; 2805 2806 res = hotkey_user_mask_set(t); 2807 2808 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2809 hotkey_poll_setup(true); 2810 #endif 2811 2812 mutex_unlock(&hotkey_mutex); 2813 2814 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2815 2816 return (res) ? res : count; 2817 } 2818 2819 static DEVICE_ATTR_RW(hotkey_mask); 2820 2821 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2822 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2823 struct device_attribute *attr, 2824 char *buf) 2825 { 2826 return sprintf(buf, "0\n"); 2827 } 2828 2829 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2830 2831 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2832 static ssize_t hotkey_bios_mask_show(struct device *dev, 2833 struct device_attribute *attr, 2834 char *buf) 2835 { 2836 printk_deprecated_attribute("hotkey_bios_mask", 2837 "This attribute is useless."); 2838 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2839 } 2840 2841 static DEVICE_ATTR_RO(hotkey_bios_mask); 2842 2843 /* sysfs hotkey all_mask ----------------------------------------------- */ 2844 static ssize_t hotkey_all_mask_show(struct device *dev, 2845 struct device_attribute *attr, 2846 char *buf) 2847 { 2848 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2849 hotkey_all_mask | hotkey_source_mask); 2850 } 2851 2852 static DEVICE_ATTR_RO(hotkey_all_mask); 2853 2854 /* sysfs hotkey all_mask ----------------------------------------------- */ 2855 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev, 2856 struct device_attribute *attr, 2857 char *buf) 2858 { 2859 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2860 hotkey_adaptive_all_mask | hotkey_source_mask); 2861 } 2862 2863 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask); 2864 2865 /* sysfs hotkey recommended_mask --------------------------------------- */ 2866 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2867 struct device_attribute *attr, 2868 char *buf) 2869 { 2870 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2871 (hotkey_all_mask | hotkey_source_mask) 2872 & ~hotkey_reserved_mask); 2873 } 2874 2875 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2876 2877 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2878 2879 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2880 static ssize_t hotkey_source_mask_show(struct device *dev, 2881 struct device_attribute *attr, 2882 char *buf) 2883 { 2884 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2885 } 2886 2887 static ssize_t hotkey_source_mask_store(struct device *dev, 2888 struct device_attribute *attr, 2889 const char *buf, size_t count) 2890 { 2891 unsigned long t; 2892 u32 r_ev; 2893 int rc; 2894 2895 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2896 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2897 return -EINVAL; 2898 2899 if (mutex_lock_killable(&hotkey_mutex)) 2900 return -ERESTARTSYS; 2901 2902 HOTKEY_CONFIG_CRITICAL_START 2903 hotkey_source_mask = t; 2904 HOTKEY_CONFIG_CRITICAL_END 2905 2906 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2907 ~hotkey_source_mask); 2908 hotkey_poll_setup(true); 2909 2910 /* check if events needed by the driver got disabled */ 2911 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2912 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2913 2914 mutex_unlock(&hotkey_mutex); 2915 2916 if (rc < 0) 2917 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n"); 2918 2919 if (r_ev) 2920 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n", 2921 r_ev); 2922 2923 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2924 2925 return (rc < 0) ? rc : count; 2926 } 2927 2928 static DEVICE_ATTR_RW(hotkey_source_mask); 2929 2930 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2931 static ssize_t hotkey_poll_freq_show(struct device *dev, 2932 struct device_attribute *attr, 2933 char *buf) 2934 { 2935 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2936 } 2937 2938 static ssize_t hotkey_poll_freq_store(struct device *dev, 2939 struct device_attribute *attr, 2940 const char *buf, size_t count) 2941 { 2942 unsigned long t; 2943 2944 if (parse_strtoul(buf, 25, &t)) 2945 return -EINVAL; 2946 2947 if (mutex_lock_killable(&hotkey_mutex)) 2948 return -ERESTARTSYS; 2949 2950 hotkey_poll_set_freq(t); 2951 hotkey_poll_setup(true); 2952 2953 mutex_unlock(&hotkey_mutex); 2954 2955 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2956 2957 return count; 2958 } 2959 2960 static DEVICE_ATTR_RW(hotkey_poll_freq); 2961 2962 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2963 2964 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2965 static ssize_t hotkey_radio_sw_show(struct device *dev, 2966 struct device_attribute *attr, 2967 char *buf) 2968 { 2969 int res; 2970 res = hotkey_get_wlsw(); 2971 if (res < 0) 2972 return res; 2973 2974 /* Opportunistic update */ 2975 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2976 2977 return snprintf(buf, PAGE_SIZE, "%d\n", 2978 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2979 } 2980 2981 static DEVICE_ATTR_RO(hotkey_radio_sw); 2982 2983 static void hotkey_radio_sw_notify_change(void) 2984 { 2985 if (tp_features.hotkey_wlsw) 2986 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2987 "hotkey_radio_sw"); 2988 } 2989 2990 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2991 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2992 struct device_attribute *attr, 2993 char *buf) 2994 { 2995 int res, s; 2996 res = hotkey_get_tablet_mode(&s); 2997 if (res < 0) 2998 return res; 2999 3000 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 3001 } 3002 3003 static DEVICE_ATTR_RO(hotkey_tablet_mode); 3004 3005 static void hotkey_tablet_mode_notify_change(void) 3006 { 3007 if (tp_features.hotkey_tablet) 3008 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3009 "hotkey_tablet_mode"); 3010 } 3011 3012 /* sysfs wakeup reason (pollable) -------------------------------------- */ 3013 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 3014 struct device_attribute *attr, 3015 char *buf) 3016 { 3017 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 3018 } 3019 3020 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 3021 3022 static void hotkey_wakeup_reason_notify_change(void) 3023 { 3024 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3025 "wakeup_reason"); 3026 } 3027 3028 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 3029 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 3030 struct device_attribute *attr, 3031 char *buf) 3032 { 3033 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 3034 } 3035 3036 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 3037 hotkey_wakeup_hotunplug_complete_show, NULL); 3038 3039 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 3040 { 3041 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3042 "wakeup_hotunplug_complete"); 3043 } 3044 3045 /* sysfs adaptive kbd mode --------------------------------------------- */ 3046 3047 static int adaptive_keyboard_get_mode(void); 3048 static int adaptive_keyboard_set_mode(int new_mode); 3049 3050 enum ADAPTIVE_KEY_MODE { 3051 HOME_MODE, 3052 WEB_BROWSER_MODE, 3053 WEB_CONFERENCE_MODE, 3054 FUNCTION_MODE, 3055 LAYFLAT_MODE 3056 }; 3057 3058 static ssize_t adaptive_kbd_mode_show(struct device *dev, 3059 struct device_attribute *attr, 3060 char *buf) 3061 { 3062 int current_mode; 3063 3064 current_mode = adaptive_keyboard_get_mode(); 3065 if (current_mode < 0) 3066 return current_mode; 3067 3068 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 3069 } 3070 3071 static ssize_t adaptive_kbd_mode_store(struct device *dev, 3072 struct device_attribute *attr, 3073 const char *buf, size_t count) 3074 { 3075 unsigned long t; 3076 int res; 3077 3078 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 3079 return -EINVAL; 3080 3081 res = adaptive_keyboard_set_mode(t); 3082 return (res < 0) ? res : count; 3083 } 3084 3085 static DEVICE_ATTR_RW(adaptive_kbd_mode); 3086 3087 static struct attribute *adaptive_kbd_attributes[] = { 3088 &dev_attr_adaptive_kbd_mode.attr, 3089 NULL 3090 }; 3091 3092 static const struct attribute_group adaptive_kbd_attr_group = { 3093 .attrs = adaptive_kbd_attributes, 3094 }; 3095 3096 /* --------------------------------------------------------------------- */ 3097 3098 static struct attribute *hotkey_attributes[] __initdata = { 3099 &dev_attr_hotkey_enable.attr, 3100 &dev_attr_hotkey_bios_enabled.attr, 3101 &dev_attr_hotkey_bios_mask.attr, 3102 &dev_attr_wakeup_reason.attr, 3103 &dev_attr_wakeup_hotunplug_complete.attr, 3104 &dev_attr_hotkey_mask.attr, 3105 &dev_attr_hotkey_all_mask.attr, 3106 &dev_attr_hotkey_adaptive_all_mask.attr, 3107 &dev_attr_hotkey_recommended_mask.attr, 3108 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3109 &dev_attr_hotkey_source_mask.attr, 3110 &dev_attr_hotkey_poll_freq.attr, 3111 #endif 3112 }; 3113 3114 /* 3115 * Sync both the hw and sw blocking state of all switches 3116 */ 3117 static void tpacpi_send_radiosw_update(void) 3118 { 3119 int wlsw; 3120 3121 /* 3122 * We must sync all rfkill controllers *before* issuing any 3123 * rfkill input events, or we will race the rfkill core input 3124 * handler. 3125 * 3126 * tpacpi_inputdev_send_mutex works as a synchronization point 3127 * for the above. 3128 * 3129 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3130 */ 3131 3132 wlsw = hotkey_get_wlsw(); 3133 3134 /* Sync hw blocking state first if it is hw-blocked */ 3135 if (wlsw == TPACPI_RFK_RADIO_OFF) 3136 tpacpi_rfk_update_hwblock_state(true); 3137 3138 /* Sync sw blocking state */ 3139 tpacpi_rfk_update_swstate_all(); 3140 3141 /* Sync hw blocking state last if it is hw-unblocked */ 3142 if (wlsw == TPACPI_RFK_RADIO_ON) 3143 tpacpi_rfk_update_hwblock_state(false); 3144 3145 /* Issue rfkill input event for WLSW switch */ 3146 if (!(wlsw < 0)) { 3147 mutex_lock(&tpacpi_inputdev_send_mutex); 3148 3149 input_report_switch(tpacpi_inputdev, 3150 SW_RFKILL_ALL, (wlsw > 0)); 3151 input_sync(tpacpi_inputdev); 3152 3153 mutex_unlock(&tpacpi_inputdev_send_mutex); 3154 } 3155 3156 /* 3157 * this can be unconditional, as we will poll state again 3158 * if userspace uses the notify to read data 3159 */ 3160 hotkey_radio_sw_notify_change(); 3161 } 3162 3163 static void hotkey_exit(void) 3164 { 3165 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3166 mutex_lock(&hotkey_mutex); 3167 hotkey_poll_stop_sync(); 3168 mutex_unlock(&hotkey_mutex); 3169 #endif 3170 3171 if (hotkey_dev_attributes) 3172 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3173 3174 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3175 "restoring original HKEY status and mask\n"); 3176 /* yes, there is a bitwise or below, we want the 3177 * functions to be called even if one of them fail */ 3178 if (((tp_features.hotkey_mask && 3179 hotkey_mask_set(hotkey_orig_mask)) | 3180 hotkey_status_set(false)) != 0) 3181 pr_err("failed to restore hot key mask to BIOS defaults\n"); 3182 } 3183 3184 static void __init hotkey_unmap(const unsigned int scancode) 3185 { 3186 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3187 clear_bit(hotkey_keycode_map[scancode], 3188 tpacpi_inputdev->keybit); 3189 hotkey_keycode_map[scancode] = KEY_RESERVED; 3190 } 3191 } 3192 3193 /* 3194 * HKEY quirks: 3195 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3196 */ 3197 3198 #define TPACPI_HK_Q_INIMASK 0x0001 3199 3200 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3201 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3202 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3203 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3204 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3205 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3206 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3207 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3208 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3209 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3210 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3211 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3212 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3213 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3214 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3215 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3216 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3217 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3218 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3219 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3220 }; 3221 3222 typedef u16 tpacpi_keymap_entry_t; 3223 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3224 3225 static int hotkey_init_tablet_mode(void) 3226 { 3227 int in_tablet_mode = 0, res; 3228 char *type = NULL; 3229 3230 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) { 3231 int has_tablet_mode; 3232 3233 in_tablet_mode = hotkey_gmms_get_tablet_mode(res, 3234 &has_tablet_mode); 3235 if (has_tablet_mode) 3236 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS; 3237 type = "GMMS"; 3238 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { 3239 /* For X41t, X60t, X61t Tablets... */ 3240 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; 3241 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); 3242 type = "MHKG"; 3243 } 3244 3245 if (!tp_features.hotkey_tablet) 3246 return 0; 3247 3248 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", 3249 type, in_tablet_mode ? "tablet" : "laptop"); 3250 3251 res = add_to_attr_set(hotkey_dev_attributes, 3252 &dev_attr_hotkey_tablet_mode.attr); 3253 if (res) 3254 return -1; 3255 3256 return in_tablet_mode; 3257 } 3258 3259 static int __init hotkey_init(struct ibm_init_struct *iibm) 3260 { 3261 /* Requirements for changing the default keymaps: 3262 * 3263 * 1. Many of the keys are mapped to KEY_RESERVED for very 3264 * good reasons. Do not change them unless you have deep 3265 * knowledge on the IBM and Lenovo ThinkPad firmware for 3266 * the various ThinkPad models. The driver behaves 3267 * differently for KEY_RESERVED: such keys have their 3268 * hot key mask *unset* in mask_recommended, and also 3269 * in the initial hot key mask programmed into the 3270 * firmware at driver load time, which means the firm- 3271 * ware may react very differently if you change them to 3272 * something else; 3273 * 3274 * 2. You must be subscribed to the linux-thinkpad and 3275 * ibm-acpi-devel mailing lists, and you should read the 3276 * list archives since 2007 if you want to change the 3277 * keymaps. This requirement exists so that you will 3278 * know the past history of problems with the thinkpad- 3279 * acpi driver keymaps, and also that you will be 3280 * listening to any bug reports; 3281 * 3282 * 3. Do not send thinkpad-acpi specific patches directly to 3283 * for merging, *ever*. Send them to the linux-acpi 3284 * mailinglist for comments. Merging is to be done only 3285 * through acpi-test and the ACPI maintainer. 3286 * 3287 * If the above is too much to ask, don't change the keymap. 3288 * Ask the thinkpad-acpi maintainer to do it, instead. 3289 */ 3290 3291 enum keymap_index { 3292 TPACPI_KEYMAP_IBM_GENERIC = 0, 3293 TPACPI_KEYMAP_LENOVO_GENERIC, 3294 }; 3295 3296 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3297 /* Generic keymap for IBM ThinkPads */ 3298 [TPACPI_KEYMAP_IBM_GENERIC] = { 3299 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3300 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3301 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3302 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3303 3304 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3305 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3306 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3307 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3308 3309 /* brightness: firmware always reacts to them */ 3310 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3311 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3312 3313 /* Thinklight: firmware always react to it */ 3314 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3315 3316 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3317 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3318 3319 /* Volume: firmware always react to it and reprograms 3320 * the built-in *extra* mixer. Never map it to control 3321 * another mixer by default. */ 3322 KEY_RESERVED, /* 0x14: VOLUME UP */ 3323 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3324 KEY_RESERVED, /* 0x16: MUTE */ 3325 3326 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3327 3328 /* (assignments unknown, please report if found) */ 3329 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3330 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3331 3332 /* No assignments, only used for Adaptive keyboards. */ 3333 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3334 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3335 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3336 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3337 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3338 3339 /* No assignment, used for newer Lenovo models */ 3340 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3341 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3342 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3343 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3344 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3345 KEY_UNKNOWN, KEY_UNKNOWN 3346 3347 }, 3348 3349 /* Generic keymap for Lenovo ThinkPads */ 3350 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3351 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3352 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3353 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3354 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3355 3356 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3357 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3358 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3359 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3360 3361 /* These should be enabled --only-- when ACPI video 3362 * is disabled (i.e. in "vendor" mode), and are handled 3363 * in a special way by the init code */ 3364 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3365 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3366 3367 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3368 3369 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3370 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3371 3372 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3373 * react to it and reprograms the built-in *extra* mixer. 3374 * Never map it to control another mixer by default. 3375 * 3376 * T60?, T61, R60?, R61: firmware and EC tries to send 3377 * these over the regular keyboard, so these are no-ops, 3378 * but there are still weird bugs re. MUTE, so do not 3379 * change unless you get test reports from all Lenovo 3380 * models. May cause the BIOS to interfere with the 3381 * HDA mixer. 3382 */ 3383 KEY_RESERVED, /* 0x14: VOLUME UP */ 3384 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3385 KEY_RESERVED, /* 0x16: MUTE */ 3386 3387 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3388 3389 /* (assignments unknown, please report if found) */ 3390 KEY_UNKNOWN, KEY_UNKNOWN, 3391 3392 /* 3393 * The mic mute button only sends 0x1a. It does not 3394 * automatically mute the mic or change the mute light. 3395 */ 3396 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3397 3398 /* (assignments unknown, please report if found) */ 3399 KEY_UNKNOWN, 3400 3401 /* Extra keys in use since the X240 / T440 / T540 */ 3402 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3403 3404 /* 3405 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3406 * The first item in this list is the Mute button which is 3407 * emitted with 0x103 through 3408 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3409 * symbol is held. 3410 * We'll need to offset those by 0x20. 3411 */ 3412 KEY_RESERVED, /* Mute held, 0x103 */ 3413 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3414 KEY_RESERVED, /* Clipping tool */ 3415 KEY_RESERVED, /* Cloud */ 3416 KEY_RESERVED, 3417 KEY_VOICECOMMAND, /* Voice */ 3418 KEY_RESERVED, 3419 KEY_RESERVED, /* Gestures */ 3420 KEY_RESERVED, 3421 KEY_RESERVED, 3422 KEY_RESERVED, 3423 KEY_CONFIG, /* Settings */ 3424 KEY_RESERVED, /* New tab */ 3425 KEY_REFRESH, /* Reload */ 3426 KEY_BACK, /* Back */ 3427 KEY_RESERVED, /* Microphone down */ 3428 KEY_RESERVED, /* Microphone up */ 3429 KEY_RESERVED, /* Microphone cancellation */ 3430 KEY_RESERVED, /* Camera mode */ 3431 KEY_RESERVED, /* Rotate display, 0x116 */ 3432 3433 /* 3434 * These are found in 2017 models (e.g. T470s, X270). 3435 * The lowest known value is 0x311, which according to 3436 * the manual should launch a user defined favorite 3437 * application. 3438 * 3439 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START, 3440 * corresponding to 0x34. 3441 */ 3442 3443 /* (assignments unknown, please report if found) */ 3444 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3445 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3446 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3447 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3448 KEY_UNKNOWN, 3449 3450 KEY_FAVORITES, /* Favorite app, 0x311 */ 3451 KEY_RESERVED, /* Clipping tool */ 3452 KEY_RESERVED, 3453 KEY_BLUETOOTH, /* Bluetooth */ 3454 KEY_KEYBOARD /* Keyboard, 0x315 */ 3455 }, 3456 }; 3457 3458 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3459 /* Generic maps (fallback) */ 3460 { 3461 .vendor = PCI_VENDOR_ID_IBM, 3462 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3463 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3464 }, 3465 { 3466 .vendor = PCI_VENDOR_ID_LENOVO, 3467 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3468 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3469 }, 3470 }; 3471 3472 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3473 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3474 3475 int res, i; 3476 int status; 3477 int hkeyv; 3478 bool radiosw_state = false; 3479 bool tabletsw_state = false; 3480 3481 unsigned long quirks; 3482 unsigned long keymap_id; 3483 3484 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3485 "initializing hotkey subdriver\n"); 3486 3487 BUG_ON(!tpacpi_inputdev); 3488 BUG_ON(tpacpi_inputdev->open != NULL || 3489 tpacpi_inputdev->close != NULL); 3490 3491 TPACPI_ACPIHANDLE_INIT(hkey); 3492 mutex_init(&hotkey_mutex); 3493 3494 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3495 mutex_init(&hotkey_thread_data_mutex); 3496 #endif 3497 3498 /* hotkey not supported on 570 */ 3499 tp_features.hotkey = hkey_handle != NULL; 3500 3501 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3502 "hotkeys are %s\n", 3503 str_supported(tp_features.hotkey)); 3504 3505 if (!tp_features.hotkey) 3506 return 1; 3507 3508 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3509 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3510 3511 tpacpi_disable_brightness_delay(); 3512 3513 /* MUST have enough space for all attributes to be added to 3514 * hotkey_dev_attributes */ 3515 hotkey_dev_attributes = create_attr_set( 3516 ARRAY_SIZE(hotkey_attributes) + 2, 3517 NULL); 3518 if (!hotkey_dev_attributes) 3519 return -ENOMEM; 3520 res = add_many_to_attr_set(hotkey_dev_attributes, 3521 hotkey_attributes, 3522 ARRAY_SIZE(hotkey_attributes)); 3523 if (res) 3524 goto err_exit; 3525 3526 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3527 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3528 for HKEY interface version 0x100 */ 3529 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3530 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3531 "firmware HKEY interface version: 0x%x\n", 3532 hkeyv); 3533 3534 switch (hkeyv >> 8) { 3535 case 1: 3536 /* 3537 * MHKV 0x100 in A31, R40, R40e, 3538 * T4x, X31, and later 3539 */ 3540 3541 /* Paranoia check AND init hotkey_all_mask */ 3542 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3543 "MHKA", "qd")) { 3544 pr_err("missing MHKA handler, please report this to %s\n", 3545 TPACPI_MAIL); 3546 /* Fallback: pre-init for FN+F3,F4,F12 */ 3547 hotkey_all_mask = 0x080cU; 3548 } else { 3549 tp_features.hotkey_mask = 1; 3550 } 3551 break; 3552 3553 case 2: 3554 /* 3555 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3556 */ 3557 3558 /* Paranoia check AND init hotkey_all_mask */ 3559 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3560 "MHKA", "dd", 1)) { 3561 pr_err("missing MHKA handler, please report this to %s\n", 3562 TPACPI_MAIL); 3563 /* Fallback: pre-init for FN+F3,F4,F12 */ 3564 hotkey_all_mask = 0x080cU; 3565 } else { 3566 tp_features.hotkey_mask = 1; 3567 } 3568 3569 /* 3570 * Check if we have an adaptive keyboard, like on the 3571 * Lenovo Carbon X1 2014 (2nd Gen). 3572 */ 3573 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3574 "MHKA", "dd", 2)) { 3575 if (hotkey_adaptive_all_mask != 0) { 3576 tp_features.has_adaptive_kbd = true; 3577 res = sysfs_create_group( 3578 &tpacpi_pdev->dev.kobj, 3579 &adaptive_kbd_attr_group); 3580 if (res) 3581 goto err_exit; 3582 } 3583 } else { 3584 tp_features.has_adaptive_kbd = false; 3585 hotkey_adaptive_all_mask = 0x0U; 3586 } 3587 break; 3588 3589 default: 3590 pr_err("unknown version of the HKEY interface: 0x%x\n", 3591 hkeyv); 3592 pr_err("please report this to %s\n", TPACPI_MAIL); 3593 break; 3594 } 3595 } 3596 3597 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3598 "hotkey masks are %s\n", 3599 str_supported(tp_features.hotkey_mask)); 3600 3601 /* Init hotkey_all_mask if not initialized yet */ 3602 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3603 (quirks & TPACPI_HK_Q_INIMASK)) 3604 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3605 3606 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3607 if (tp_features.hotkey_mask) { 3608 /* hotkey_source_mask *must* be zero for 3609 * the first hotkey_mask_get to return hotkey_orig_mask */ 3610 res = hotkey_mask_get(); 3611 if (res) 3612 goto err_exit; 3613 3614 hotkey_orig_mask = hotkey_acpi_mask; 3615 } else { 3616 hotkey_orig_mask = hotkey_all_mask; 3617 hotkey_acpi_mask = hotkey_all_mask; 3618 } 3619 3620 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3621 if (dbg_wlswemul) { 3622 tp_features.hotkey_wlsw = 1; 3623 radiosw_state = !!tpacpi_wlsw_emulstate; 3624 pr_info("radio switch emulation enabled\n"); 3625 } else 3626 #endif 3627 /* Not all thinkpads have a hardware radio switch */ 3628 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3629 tp_features.hotkey_wlsw = 1; 3630 radiosw_state = !!status; 3631 pr_info("radio switch found; radios are %s\n", 3632 enabled(status, 0)); 3633 } 3634 if (tp_features.hotkey_wlsw) 3635 res = add_to_attr_set(hotkey_dev_attributes, 3636 &dev_attr_hotkey_radio_sw.attr); 3637 3638 res = hotkey_init_tablet_mode(); 3639 if (res < 0) 3640 goto err_exit; 3641 3642 tabletsw_state = res; 3643 3644 res = register_attr_set_with_sysfs(hotkey_dev_attributes, 3645 &tpacpi_pdev->dev.kobj); 3646 if (res) 3647 goto err_exit; 3648 3649 /* Set up key map */ 3650 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3651 GFP_KERNEL); 3652 if (!hotkey_keycode_map) { 3653 pr_err("failed to allocate memory for key map\n"); 3654 res = -ENOMEM; 3655 goto err_exit; 3656 } 3657 3658 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3659 ARRAY_SIZE(tpacpi_keymap_qtable)); 3660 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3661 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3662 "using keymap number %lu\n", keymap_id); 3663 3664 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3665 TPACPI_HOTKEY_MAP_SIZE); 3666 3667 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3668 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3669 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3670 tpacpi_inputdev->keycode = hotkey_keycode_map; 3671 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3672 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3673 input_set_capability(tpacpi_inputdev, EV_KEY, 3674 hotkey_keycode_map[i]); 3675 } else { 3676 if (i < sizeof(hotkey_reserved_mask)*8) 3677 hotkey_reserved_mask |= 1 << i; 3678 } 3679 } 3680 3681 if (tp_features.hotkey_wlsw) { 3682 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3683 input_report_switch(tpacpi_inputdev, 3684 SW_RFKILL_ALL, radiosw_state); 3685 } 3686 if (tp_features.hotkey_tablet) { 3687 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3688 input_report_switch(tpacpi_inputdev, 3689 SW_TABLET_MODE, tabletsw_state); 3690 } 3691 3692 /* Do not issue duplicate brightness change events to 3693 * userspace. tpacpi_detect_brightness_capabilities() must have 3694 * been called before this point */ 3695 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3696 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n"); 3697 pr_notice("Disabling thinkpad-acpi brightness events by default...\n"); 3698 3699 /* Disable brightness up/down on Lenovo thinkpads when 3700 * ACPI is handling them, otherwise it is plain impossible 3701 * for userspace to do something even remotely sane */ 3702 hotkey_reserved_mask |= 3703 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3704 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3705 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3706 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3707 } 3708 3709 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3710 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3711 & ~hotkey_all_mask 3712 & ~hotkey_reserved_mask; 3713 3714 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3715 "hotkey source mask 0x%08x, polling freq %u\n", 3716 hotkey_source_mask, hotkey_poll_freq); 3717 #endif 3718 3719 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3720 "enabling firmware HKEY event interface...\n"); 3721 res = hotkey_status_set(true); 3722 if (res) { 3723 hotkey_exit(); 3724 return res; 3725 } 3726 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3727 | hotkey_driver_mask) 3728 & ~hotkey_source_mask); 3729 if (res < 0 && res != -ENXIO) { 3730 hotkey_exit(); 3731 return res; 3732 } 3733 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3734 & ~hotkey_reserved_mask; 3735 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3736 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3737 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3738 3739 tpacpi_inputdev->open = &hotkey_inputdev_open; 3740 tpacpi_inputdev->close = &hotkey_inputdev_close; 3741 3742 hotkey_poll_setup_safe(true); 3743 3744 return 0; 3745 3746 err_exit: 3747 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3748 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3749 &adaptive_kbd_attr_group); 3750 3751 hotkey_dev_attributes = NULL; 3752 3753 return (res < 0) ? res : 1; 3754 } 3755 3756 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3757 * mode, Web conference mode, Function mode and Lay-flat mode. 3758 * We support Home mode and Function mode currently. 3759 * 3760 * Will consider support rest of modes in future. 3761 * 3762 */ 3763 static const int adaptive_keyboard_modes[] = { 3764 HOME_MODE, 3765 /* WEB_BROWSER_MODE = 2, 3766 WEB_CONFERENCE_MODE = 3, */ 3767 FUNCTION_MODE 3768 }; 3769 3770 #define DFR_CHANGE_ROW 0x101 3771 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3772 #define FIRST_ADAPTIVE_KEY 0x103 3773 3774 /* press Fn key a while second, it will switch to Function Mode. Then 3775 * release Fn key, previous mode be restored. 3776 */ 3777 static bool adaptive_keyboard_mode_is_saved; 3778 static int adaptive_keyboard_prev_mode; 3779 3780 static int adaptive_keyboard_get_mode(void) 3781 { 3782 int mode = 0; 3783 3784 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3785 pr_err("Cannot read adaptive keyboard mode\n"); 3786 return -EIO; 3787 } 3788 3789 return mode; 3790 } 3791 3792 static int adaptive_keyboard_set_mode(int new_mode) 3793 { 3794 if (new_mode < 0 || 3795 new_mode > LAYFLAT_MODE) 3796 return -EINVAL; 3797 3798 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3799 pr_err("Cannot set adaptive keyboard mode\n"); 3800 return -EIO; 3801 } 3802 3803 return 0; 3804 } 3805 3806 static int adaptive_keyboard_get_next_mode(int mode) 3807 { 3808 size_t i; 3809 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3810 3811 for (i = 0; i <= max_mode; i++) { 3812 if (adaptive_keyboard_modes[i] == mode) 3813 break; 3814 } 3815 3816 if (i >= max_mode) 3817 i = 0; 3818 else 3819 i++; 3820 3821 return adaptive_keyboard_modes[i]; 3822 } 3823 3824 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3825 { 3826 int current_mode = 0; 3827 int new_mode = 0; 3828 int keycode; 3829 3830 switch (scancode) { 3831 case DFR_CHANGE_ROW: 3832 if (adaptive_keyboard_mode_is_saved) { 3833 new_mode = adaptive_keyboard_prev_mode; 3834 adaptive_keyboard_mode_is_saved = false; 3835 } else { 3836 current_mode = adaptive_keyboard_get_mode(); 3837 if (current_mode < 0) 3838 return false; 3839 new_mode = adaptive_keyboard_get_next_mode( 3840 current_mode); 3841 } 3842 3843 if (adaptive_keyboard_set_mode(new_mode) < 0) 3844 return false; 3845 3846 return true; 3847 3848 case DFR_SHOW_QUICKVIEW_ROW: 3849 current_mode = adaptive_keyboard_get_mode(); 3850 if (current_mode < 0) 3851 return false; 3852 3853 adaptive_keyboard_prev_mode = current_mode; 3854 adaptive_keyboard_mode_is_saved = true; 3855 3856 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3857 return false; 3858 return true; 3859 3860 default: 3861 if (scancode < FIRST_ADAPTIVE_KEY || 3862 scancode >= FIRST_ADAPTIVE_KEY + 3863 TP_ACPI_HOTKEYSCAN_EXTENDED_START - 3864 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3865 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3866 scancode); 3867 return false; 3868 } 3869 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + 3870 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START]; 3871 if (keycode != KEY_RESERVED) { 3872 mutex_lock(&tpacpi_inputdev_send_mutex); 3873 3874 input_report_key(tpacpi_inputdev, keycode, 1); 3875 input_sync(tpacpi_inputdev); 3876 3877 input_report_key(tpacpi_inputdev, keycode, 0); 3878 input_sync(tpacpi_inputdev); 3879 3880 mutex_unlock(&tpacpi_inputdev_send_mutex); 3881 } 3882 return true; 3883 } 3884 } 3885 3886 static bool hotkey_notify_hotkey(const u32 hkey, 3887 bool *send_acpi_ev, 3888 bool *ignore_acpi_ev) 3889 { 3890 /* 0x1000-0x1FFF: key presses */ 3891 unsigned int scancode = hkey & 0xfff; 3892 *send_acpi_ev = true; 3893 *ignore_acpi_ev = false; 3894 3895 /* 3896 * Original events are in the 0x10XX range, the adaptive keyboard 3897 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017 3898 * models, additional keys are emitted through 0x13XX. 3899 */ 3900 switch ((hkey >> 8) & 0xf) { 3901 case 0: 3902 if (scancode > 0 && 3903 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3904 /* HKEY event 0x1001 is scancode 0x00 */ 3905 scancode--; 3906 if (!(hotkey_source_mask & (1 << scancode))) { 3907 tpacpi_input_send_key_masked(scancode); 3908 *send_acpi_ev = false; 3909 } else { 3910 *ignore_acpi_ev = true; 3911 } 3912 return true; 3913 } 3914 break; 3915 3916 case 1: 3917 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3918 3919 case 3: 3920 /* Extended keycodes start at 0x300 and our offset into the map 3921 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode 3922 * will be positive, but might not be in the correct range. 3923 */ 3924 scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START); 3925 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START && 3926 scancode < TPACPI_HOTKEY_MAP_LEN) { 3927 tpacpi_input_send_key(scancode); 3928 return true; 3929 } 3930 break; 3931 } 3932 3933 return false; 3934 } 3935 3936 static bool hotkey_notify_wakeup(const u32 hkey, 3937 bool *send_acpi_ev, 3938 bool *ignore_acpi_ev) 3939 { 3940 /* 0x2000-0x2FFF: Wakeup reason */ 3941 *send_acpi_ev = true; 3942 *ignore_acpi_ev = false; 3943 3944 switch (hkey) { 3945 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3946 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3947 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3948 *ignore_acpi_ev = true; 3949 break; 3950 3951 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3952 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3953 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3954 *ignore_acpi_ev = true; 3955 break; 3956 3957 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3958 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3959 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3960 /* how to auto-heal: */ 3961 /* 2313: woke up from S3, go to S4/S5 */ 3962 /* 2413: woke up from S4, go to S5 */ 3963 break; 3964 3965 default: 3966 return false; 3967 } 3968 3969 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3970 pr_info("woke up due to a hot-unplug request...\n"); 3971 hotkey_wakeup_reason_notify_change(); 3972 } 3973 return true; 3974 } 3975 3976 static bool hotkey_notify_dockevent(const u32 hkey, 3977 bool *send_acpi_ev, 3978 bool *ignore_acpi_ev) 3979 { 3980 /* 0x4000-0x4FFF: dock-related events */ 3981 *send_acpi_ev = true; 3982 *ignore_acpi_ev = false; 3983 3984 switch (hkey) { 3985 case TP_HKEY_EV_UNDOCK_ACK: 3986 /* ACPI undock operation completed after wakeup */ 3987 hotkey_autosleep_ack = 1; 3988 pr_info("undocked\n"); 3989 hotkey_wakeup_hotunplug_complete_notify_change(); 3990 return true; 3991 3992 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 3993 pr_info("docked into hotplug port replicator\n"); 3994 return true; 3995 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 3996 pr_info("undocked from hotplug port replicator\n"); 3997 return true; 3998 3999 default: 4000 return false; 4001 } 4002 } 4003 4004 static bool hotkey_notify_usrevent(const u32 hkey, 4005 bool *send_acpi_ev, 4006 bool *ignore_acpi_ev) 4007 { 4008 /* 0x5000-0x5FFF: human interface helpers */ 4009 *send_acpi_ev = true; 4010 *ignore_acpi_ev = false; 4011 4012 switch (hkey) { 4013 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 4014 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 4015 return true; 4016 4017 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 4018 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 4019 tpacpi_input_send_tabletsw(); 4020 hotkey_tablet_mode_notify_change(); 4021 *send_acpi_ev = false; 4022 return true; 4023 4024 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 4025 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 4026 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 4027 /* do not propagate these events */ 4028 *ignore_acpi_ev = true; 4029 return true; 4030 4031 default: 4032 return false; 4033 } 4034 } 4035 4036 static void thermal_dump_all_sensors(void); 4037 4038 static bool hotkey_notify_6xxx(const u32 hkey, 4039 bool *send_acpi_ev, 4040 bool *ignore_acpi_ev) 4041 { 4042 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 4043 *send_acpi_ev = true; 4044 *ignore_acpi_ev = false; 4045 4046 switch (hkey) { 4047 case TP_HKEY_EV_THM_TABLE_CHANGED: 4048 pr_debug("EC reports: Thermal Table has changed\n"); 4049 /* recommended action: do nothing, we don't have 4050 * Lenovo ATM information */ 4051 return true; 4052 case TP_HKEY_EV_THM_CSM_COMPLETED: 4053 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n"); 4054 /* recommended action: do nothing, we don't have 4055 * Lenovo ATM information */ 4056 return true; 4057 case TP_HKEY_EV_THM_TRANSFM_CHANGED: 4058 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n"); 4059 /* recommended action: do nothing, we don't have 4060 * Lenovo ATM information */ 4061 return true; 4062 case TP_HKEY_EV_ALARM_BAT_HOT: 4063 pr_crit("THERMAL ALARM: battery is too hot!\n"); 4064 /* recommended action: warn user through gui */ 4065 break; 4066 case TP_HKEY_EV_ALARM_BAT_XHOT: 4067 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 4068 /* recommended action: immediate sleep/hibernate */ 4069 break; 4070 case TP_HKEY_EV_ALARM_SENSOR_HOT: 4071 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n"); 4072 /* recommended action: warn user through gui, that */ 4073 /* some internal component is too hot */ 4074 break; 4075 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 4076 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n"); 4077 /* recommended action: immediate sleep/hibernate */ 4078 break; 4079 case TP_HKEY_EV_AC_CHANGED: 4080 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 4081 * AC status changed; can be triggered by plugging or 4082 * unplugging AC adapter, docking or undocking. */ 4083 4084 /* fallthrough */ 4085 4086 case TP_HKEY_EV_KEY_NUMLOCK: 4087 case TP_HKEY_EV_KEY_FN: 4088 case TP_HKEY_EV_KEY_FN_ESC: 4089 /* key press events, we just ignore them as long as the EC 4090 * is still reporting them in the normal keyboard stream */ 4091 *send_acpi_ev = false; 4092 *ignore_acpi_ev = true; 4093 return true; 4094 4095 case TP_HKEY_EV_TABLET_CHANGED: 4096 tpacpi_input_send_tabletsw(); 4097 hotkey_tablet_mode_notify_change(); 4098 *send_acpi_ev = false; 4099 return true; 4100 4101 case TP_HKEY_EV_PALM_DETECTED: 4102 case TP_HKEY_EV_PALM_UNDETECTED: 4103 /* palm detected hovering the keyboard, forward to user-space 4104 * via netlink for consumption */ 4105 return true; 4106 4107 default: 4108 /* report simply as unknown, no sensor dump */ 4109 return false; 4110 } 4111 4112 thermal_dump_all_sensors(); 4113 return true; 4114 } 4115 4116 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 4117 { 4118 u32 hkey; 4119 bool send_acpi_ev; 4120 bool ignore_acpi_ev; 4121 bool known_ev; 4122 4123 if (event != 0x80) { 4124 pr_err("unknown HKEY notification event %d\n", event); 4125 /* forward it to userspace, maybe it knows how to handle it */ 4126 acpi_bus_generate_netlink_event( 4127 ibm->acpi->device->pnp.device_class, 4128 dev_name(&ibm->acpi->device->dev), 4129 event, 0); 4130 return; 4131 } 4132 4133 while (1) { 4134 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 4135 pr_err("failed to retrieve HKEY event\n"); 4136 return; 4137 } 4138 4139 if (hkey == 0) { 4140 /* queue empty */ 4141 return; 4142 } 4143 4144 send_acpi_ev = true; 4145 ignore_acpi_ev = false; 4146 4147 switch (hkey >> 12) { 4148 case 1: 4149 /* 0x1000-0x1FFF: key presses */ 4150 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 4151 &ignore_acpi_ev); 4152 break; 4153 case 2: 4154 /* 0x2000-0x2FFF: Wakeup reason */ 4155 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 4156 &ignore_acpi_ev); 4157 break; 4158 case 3: 4159 /* 0x3000-0x3FFF: bay-related wakeups */ 4160 switch (hkey) { 4161 case TP_HKEY_EV_BAYEJ_ACK: 4162 hotkey_autosleep_ack = 1; 4163 pr_info("bay ejected\n"); 4164 hotkey_wakeup_hotunplug_complete_notify_change(); 4165 known_ev = true; 4166 break; 4167 case TP_HKEY_EV_OPTDRV_EJ: 4168 /* FIXME: kick libata if SATA link offline */ 4169 known_ev = true; 4170 break; 4171 default: 4172 known_ev = false; 4173 } 4174 break; 4175 case 4: 4176 /* 0x4000-0x4FFF: dock-related events */ 4177 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 4178 &ignore_acpi_ev); 4179 break; 4180 case 5: 4181 /* 0x5000-0x5FFF: human interface helpers */ 4182 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 4183 &ignore_acpi_ev); 4184 break; 4185 case 6: 4186 /* 0x6000-0x6FFF: thermal alarms/notices and 4187 * keyboard events */ 4188 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 4189 &ignore_acpi_ev); 4190 break; 4191 case 7: 4192 /* 0x7000-0x7FFF: misc */ 4193 if (tp_features.hotkey_wlsw && 4194 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 4195 tpacpi_send_radiosw_update(); 4196 send_acpi_ev = 0; 4197 known_ev = true; 4198 break; 4199 } 4200 /* fallthrough to default */ 4201 default: 4202 known_ev = false; 4203 } 4204 if (!known_ev) { 4205 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4206 pr_notice("please report the conditions when this event happened to %s\n", 4207 TPACPI_MAIL); 4208 } 4209 4210 /* netlink events */ 4211 if (!ignore_acpi_ev && send_acpi_ev) { 4212 acpi_bus_generate_netlink_event( 4213 ibm->acpi->device->pnp.device_class, 4214 dev_name(&ibm->acpi->device->dev), 4215 event, hkey); 4216 } 4217 } 4218 } 4219 4220 static void hotkey_suspend(void) 4221 { 4222 /* Do these on suspend, we get the events on early resume! */ 4223 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4224 hotkey_autosleep_ack = 0; 4225 4226 /* save previous mode of adaptive keyboard of X1 Carbon */ 4227 if (tp_features.has_adaptive_kbd) { 4228 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4229 "GTRW", "dd", 0)) { 4230 pr_err("Cannot read adaptive keyboard mode.\n"); 4231 } 4232 } 4233 } 4234 4235 static void hotkey_resume(void) 4236 { 4237 tpacpi_disable_brightness_delay(); 4238 4239 if (hotkey_status_set(true) < 0 || 4240 hotkey_mask_set(hotkey_acpi_mask) < 0) 4241 pr_err("error while attempting to reset the event firmware interface\n"); 4242 4243 tpacpi_send_radiosw_update(); 4244 hotkey_tablet_mode_notify_change(); 4245 hotkey_wakeup_reason_notify_change(); 4246 hotkey_wakeup_hotunplug_complete_notify_change(); 4247 hotkey_poll_setup_safe(false); 4248 4249 /* restore previous mode of adapive keyboard of X1 Carbon */ 4250 if (tp_features.has_adaptive_kbd) { 4251 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4252 adaptive_keyboard_prev_mode)) { 4253 pr_err("Cannot set adaptive keyboard mode.\n"); 4254 } 4255 } 4256 } 4257 4258 /* procfs -------------------------------------------------------------- */ 4259 static int hotkey_read(struct seq_file *m) 4260 { 4261 int res, status; 4262 4263 if (!tp_features.hotkey) { 4264 seq_printf(m, "status:\t\tnot supported\n"); 4265 return 0; 4266 } 4267 4268 if (mutex_lock_killable(&hotkey_mutex)) 4269 return -ERESTARTSYS; 4270 res = hotkey_status_get(&status); 4271 if (!res) 4272 res = hotkey_mask_get(); 4273 mutex_unlock(&hotkey_mutex); 4274 if (res) 4275 return res; 4276 4277 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4278 if (hotkey_all_mask) { 4279 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4280 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4281 } else { 4282 seq_printf(m, "mask:\t\tnot supported\n"); 4283 seq_printf(m, "commands:\tenable, disable, reset\n"); 4284 } 4285 4286 return 0; 4287 } 4288 4289 static void hotkey_enabledisable_warn(bool enable) 4290 { 4291 tpacpi_log_usertask("procfs hotkey enable/disable"); 4292 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4293 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n"))) 4294 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n"); 4295 } 4296 4297 static int hotkey_write(char *buf) 4298 { 4299 int res; 4300 u32 mask; 4301 char *cmd; 4302 4303 if (!tp_features.hotkey) 4304 return -ENODEV; 4305 4306 if (mutex_lock_killable(&hotkey_mutex)) 4307 return -ERESTARTSYS; 4308 4309 mask = hotkey_user_mask; 4310 4311 res = 0; 4312 while ((cmd = next_cmd(&buf))) { 4313 if (strlencmp(cmd, "enable") == 0) { 4314 hotkey_enabledisable_warn(1); 4315 } else if (strlencmp(cmd, "disable") == 0) { 4316 hotkey_enabledisable_warn(0); 4317 res = -EPERM; 4318 } else if (strlencmp(cmd, "reset") == 0) { 4319 mask = (hotkey_all_mask | hotkey_source_mask) 4320 & ~hotkey_reserved_mask; 4321 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4322 /* mask set */ 4323 } else if (sscanf(cmd, "%x", &mask) == 1) { 4324 /* mask set */ 4325 } else { 4326 res = -EINVAL; 4327 goto errexit; 4328 } 4329 } 4330 4331 if (!res) { 4332 tpacpi_disclose_usertask("procfs hotkey", 4333 "set mask to 0x%08x\n", mask); 4334 res = hotkey_user_mask_set(mask); 4335 } 4336 4337 errexit: 4338 mutex_unlock(&hotkey_mutex); 4339 return res; 4340 } 4341 4342 static const struct acpi_device_id ibm_htk_device_ids[] = { 4343 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4344 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4345 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0}, 4346 {"", 0}, 4347 }; 4348 4349 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4350 .hid = ibm_htk_device_ids, 4351 .notify = hotkey_notify, 4352 .handle = &hkey_handle, 4353 .type = ACPI_DEVICE_NOTIFY, 4354 }; 4355 4356 static struct ibm_struct hotkey_driver_data = { 4357 .name = "hotkey", 4358 .read = hotkey_read, 4359 .write = hotkey_write, 4360 .exit = hotkey_exit, 4361 .resume = hotkey_resume, 4362 .suspend = hotkey_suspend, 4363 .acpi = &ibm_hotkey_acpidriver, 4364 }; 4365 4366 /************************************************************************* 4367 * Bluetooth subdriver 4368 */ 4369 4370 enum { 4371 /* ACPI GBDC/SBDC bits */ 4372 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4373 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4374 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4375 0 = disable, 1 = enable */ 4376 }; 4377 4378 enum { 4379 /* ACPI \BLTH commands */ 4380 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4381 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4382 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4383 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4384 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4385 }; 4386 4387 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4388 4389 static int bluetooth_get_status(void) 4390 { 4391 int status; 4392 4393 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4394 if (dbg_bluetoothemul) 4395 return (tpacpi_bluetooth_emulstate) ? 4396 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4397 #endif 4398 4399 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4400 return -EIO; 4401 4402 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4403 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4404 } 4405 4406 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4407 { 4408 int status; 4409 4410 vdbg_printk(TPACPI_DBG_RFKILL, 4411 "will attempt to %s bluetooth\n", 4412 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4413 4414 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4415 if (dbg_bluetoothemul) { 4416 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4417 return 0; 4418 } 4419 #endif 4420 4421 if (state == TPACPI_RFK_RADIO_ON) 4422 status = TP_ACPI_BLUETOOTH_RADIOSSW 4423 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4424 else 4425 status = 0; 4426 4427 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4428 return -EIO; 4429 4430 return 0; 4431 } 4432 4433 /* sysfs bluetooth enable ---------------------------------------------- */ 4434 static ssize_t bluetooth_enable_show(struct device *dev, 4435 struct device_attribute *attr, 4436 char *buf) 4437 { 4438 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4439 attr, buf); 4440 } 4441 4442 static ssize_t bluetooth_enable_store(struct device *dev, 4443 struct device_attribute *attr, 4444 const char *buf, size_t count) 4445 { 4446 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4447 attr, buf, count); 4448 } 4449 4450 static DEVICE_ATTR_RW(bluetooth_enable); 4451 4452 /* --------------------------------------------------------------------- */ 4453 4454 static struct attribute *bluetooth_attributes[] = { 4455 &dev_attr_bluetooth_enable.attr, 4456 NULL 4457 }; 4458 4459 static const struct attribute_group bluetooth_attr_group = { 4460 .attrs = bluetooth_attributes, 4461 }; 4462 4463 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4464 .get_status = bluetooth_get_status, 4465 .set_status = bluetooth_set_status, 4466 }; 4467 4468 static void bluetooth_shutdown(void) 4469 { 4470 /* Order firmware to save current state to NVRAM */ 4471 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4472 TP_ACPI_BLTH_SAVE_STATE)) 4473 pr_notice("failed to save bluetooth state to NVRAM\n"); 4474 else 4475 vdbg_printk(TPACPI_DBG_RFKILL, 4476 "bluetooth state saved to NVRAM\n"); 4477 } 4478 4479 static void bluetooth_exit(void) 4480 { 4481 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4482 &bluetooth_attr_group); 4483 4484 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4485 4486 bluetooth_shutdown(); 4487 } 4488 4489 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4490 { 4491 int res; 4492 int status = 0; 4493 4494 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4495 "initializing bluetooth subdriver\n"); 4496 4497 TPACPI_ACPIHANDLE_INIT(hkey); 4498 4499 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4500 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4501 tp_features.bluetooth = hkey_handle && 4502 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4503 4504 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4505 "bluetooth is %s, status 0x%02x\n", 4506 str_supported(tp_features.bluetooth), 4507 status); 4508 4509 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4510 if (dbg_bluetoothemul) { 4511 tp_features.bluetooth = 1; 4512 pr_info("bluetooth switch emulation enabled\n"); 4513 } else 4514 #endif 4515 if (tp_features.bluetooth && 4516 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4517 /* no bluetooth hardware present in system */ 4518 tp_features.bluetooth = 0; 4519 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4520 "bluetooth hardware not installed\n"); 4521 } 4522 4523 if (!tp_features.bluetooth) 4524 return 1; 4525 4526 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4527 &bluetooth_tprfk_ops, 4528 RFKILL_TYPE_BLUETOOTH, 4529 TPACPI_RFK_BLUETOOTH_SW_NAME, 4530 true); 4531 if (res) 4532 return res; 4533 4534 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4535 &bluetooth_attr_group); 4536 if (res) { 4537 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4538 return res; 4539 } 4540 4541 return 0; 4542 } 4543 4544 /* procfs -------------------------------------------------------------- */ 4545 static int bluetooth_read(struct seq_file *m) 4546 { 4547 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4548 } 4549 4550 static int bluetooth_write(char *buf) 4551 { 4552 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4553 } 4554 4555 static struct ibm_struct bluetooth_driver_data = { 4556 .name = "bluetooth", 4557 .read = bluetooth_read, 4558 .write = bluetooth_write, 4559 .exit = bluetooth_exit, 4560 .shutdown = bluetooth_shutdown, 4561 }; 4562 4563 /************************************************************************* 4564 * Wan subdriver 4565 */ 4566 4567 enum { 4568 /* ACPI GWAN/SWAN bits */ 4569 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4570 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4571 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4572 0 = disable, 1 = enable */ 4573 }; 4574 4575 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4576 4577 static int wan_get_status(void) 4578 { 4579 int status; 4580 4581 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4582 if (dbg_wwanemul) 4583 return (tpacpi_wwan_emulstate) ? 4584 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4585 #endif 4586 4587 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4588 return -EIO; 4589 4590 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4591 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4592 } 4593 4594 static int wan_set_status(enum tpacpi_rfkill_state state) 4595 { 4596 int status; 4597 4598 vdbg_printk(TPACPI_DBG_RFKILL, 4599 "will attempt to %s wwan\n", 4600 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4601 4602 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4603 if (dbg_wwanemul) { 4604 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4605 return 0; 4606 } 4607 #endif 4608 4609 if (state == TPACPI_RFK_RADIO_ON) 4610 status = TP_ACPI_WANCARD_RADIOSSW 4611 | TP_ACPI_WANCARD_RESUMECTRL; 4612 else 4613 status = 0; 4614 4615 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4616 return -EIO; 4617 4618 return 0; 4619 } 4620 4621 /* sysfs wan enable ---------------------------------------------------- */ 4622 static ssize_t wan_enable_show(struct device *dev, 4623 struct device_attribute *attr, 4624 char *buf) 4625 { 4626 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4627 attr, buf); 4628 } 4629 4630 static ssize_t wan_enable_store(struct device *dev, 4631 struct device_attribute *attr, 4632 const char *buf, size_t count) 4633 { 4634 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4635 attr, buf, count); 4636 } 4637 4638 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4639 wan_enable_show, wan_enable_store); 4640 4641 /* --------------------------------------------------------------------- */ 4642 4643 static struct attribute *wan_attributes[] = { 4644 &dev_attr_wwan_enable.attr, 4645 NULL 4646 }; 4647 4648 static const struct attribute_group wan_attr_group = { 4649 .attrs = wan_attributes, 4650 }; 4651 4652 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4653 .get_status = wan_get_status, 4654 .set_status = wan_set_status, 4655 }; 4656 4657 static void wan_shutdown(void) 4658 { 4659 /* Order firmware to save current state to NVRAM */ 4660 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4661 TP_ACPI_WGSV_SAVE_STATE)) 4662 pr_notice("failed to save WWAN state to NVRAM\n"); 4663 else 4664 vdbg_printk(TPACPI_DBG_RFKILL, 4665 "WWAN state saved to NVRAM\n"); 4666 } 4667 4668 static void wan_exit(void) 4669 { 4670 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4671 &wan_attr_group); 4672 4673 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4674 4675 wan_shutdown(); 4676 } 4677 4678 static int __init wan_init(struct ibm_init_struct *iibm) 4679 { 4680 int res; 4681 int status = 0; 4682 4683 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4684 "initializing wan subdriver\n"); 4685 4686 TPACPI_ACPIHANDLE_INIT(hkey); 4687 4688 tp_features.wan = hkey_handle && 4689 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4690 4691 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4692 "wan is %s, status 0x%02x\n", 4693 str_supported(tp_features.wan), 4694 status); 4695 4696 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4697 if (dbg_wwanemul) { 4698 tp_features.wan = 1; 4699 pr_info("wwan switch emulation enabled\n"); 4700 } else 4701 #endif 4702 if (tp_features.wan && 4703 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4704 /* no wan hardware present in system */ 4705 tp_features.wan = 0; 4706 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4707 "wan hardware not installed\n"); 4708 } 4709 4710 if (!tp_features.wan) 4711 return 1; 4712 4713 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4714 &wan_tprfk_ops, 4715 RFKILL_TYPE_WWAN, 4716 TPACPI_RFK_WWAN_SW_NAME, 4717 true); 4718 if (res) 4719 return res; 4720 4721 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4722 &wan_attr_group); 4723 4724 if (res) { 4725 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4726 return res; 4727 } 4728 4729 return 0; 4730 } 4731 4732 /* procfs -------------------------------------------------------------- */ 4733 static int wan_read(struct seq_file *m) 4734 { 4735 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4736 } 4737 4738 static int wan_write(char *buf) 4739 { 4740 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4741 } 4742 4743 static struct ibm_struct wan_driver_data = { 4744 .name = "wan", 4745 .read = wan_read, 4746 .write = wan_write, 4747 .exit = wan_exit, 4748 .shutdown = wan_shutdown, 4749 }; 4750 4751 /************************************************************************* 4752 * UWB subdriver 4753 */ 4754 4755 enum { 4756 /* ACPI GUWB/SUWB bits */ 4757 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4758 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4759 }; 4760 4761 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4762 4763 static int uwb_get_status(void) 4764 { 4765 int status; 4766 4767 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4768 if (dbg_uwbemul) 4769 return (tpacpi_uwb_emulstate) ? 4770 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4771 #endif 4772 4773 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4774 return -EIO; 4775 4776 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4777 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4778 } 4779 4780 static int uwb_set_status(enum tpacpi_rfkill_state state) 4781 { 4782 int status; 4783 4784 vdbg_printk(TPACPI_DBG_RFKILL, 4785 "will attempt to %s UWB\n", 4786 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4787 4788 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4789 if (dbg_uwbemul) { 4790 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4791 return 0; 4792 } 4793 #endif 4794 4795 if (state == TPACPI_RFK_RADIO_ON) 4796 status = TP_ACPI_UWB_RADIOSSW; 4797 else 4798 status = 0; 4799 4800 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4801 return -EIO; 4802 4803 return 0; 4804 } 4805 4806 /* --------------------------------------------------------------------- */ 4807 4808 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4809 .get_status = uwb_get_status, 4810 .set_status = uwb_set_status, 4811 }; 4812 4813 static void uwb_exit(void) 4814 { 4815 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4816 } 4817 4818 static int __init uwb_init(struct ibm_init_struct *iibm) 4819 { 4820 int res; 4821 int status = 0; 4822 4823 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4824 "initializing uwb subdriver\n"); 4825 4826 TPACPI_ACPIHANDLE_INIT(hkey); 4827 4828 tp_features.uwb = hkey_handle && 4829 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4830 4831 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4832 "uwb is %s, status 0x%02x\n", 4833 str_supported(tp_features.uwb), 4834 status); 4835 4836 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4837 if (dbg_uwbemul) { 4838 tp_features.uwb = 1; 4839 pr_info("uwb switch emulation enabled\n"); 4840 } else 4841 #endif 4842 if (tp_features.uwb && 4843 !(status & TP_ACPI_UWB_HWPRESENT)) { 4844 /* no uwb hardware present in system */ 4845 tp_features.uwb = 0; 4846 dbg_printk(TPACPI_DBG_INIT, 4847 "uwb hardware not installed\n"); 4848 } 4849 4850 if (!tp_features.uwb) 4851 return 1; 4852 4853 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4854 &uwb_tprfk_ops, 4855 RFKILL_TYPE_UWB, 4856 TPACPI_RFK_UWB_SW_NAME, 4857 false); 4858 return res; 4859 } 4860 4861 static struct ibm_struct uwb_driver_data = { 4862 .name = "uwb", 4863 .exit = uwb_exit, 4864 .flags.experimental = 1, 4865 }; 4866 4867 /************************************************************************* 4868 * Video subdriver 4869 */ 4870 4871 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4872 4873 enum video_access_mode { 4874 TPACPI_VIDEO_NONE = 0, 4875 TPACPI_VIDEO_570, /* 570 */ 4876 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4877 TPACPI_VIDEO_NEW, /* all others */ 4878 }; 4879 4880 enum { /* video status flags, based on VIDEO_570 */ 4881 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4882 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4883 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4884 }; 4885 4886 enum { /* TPACPI_VIDEO_570 constants */ 4887 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4888 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4889 * video_status_flags */ 4890 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4891 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4892 }; 4893 4894 static enum video_access_mode video_supported; 4895 static int video_orig_autosw; 4896 4897 static int video_autosw_get(void); 4898 static int video_autosw_set(int enable); 4899 4900 TPACPI_HANDLE(vid, root, 4901 "\\_SB.PCI.AGP.VGA", /* 570 */ 4902 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4903 "\\_SB.PCI0.VID0", /* 770e */ 4904 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4905 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4906 "\\_SB.PCI0.AGP.VID", /* all others */ 4907 ); /* R30, R31 */ 4908 4909 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4910 4911 static int __init video_init(struct ibm_init_struct *iibm) 4912 { 4913 int ivga; 4914 4915 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4916 4917 TPACPI_ACPIHANDLE_INIT(vid); 4918 if (tpacpi_is_ibm()) 4919 TPACPI_ACPIHANDLE_INIT(vid2); 4920 4921 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4922 /* G41, assume IVGA doesn't change */ 4923 vid_handle = vid2_handle; 4924 4925 if (!vid_handle) 4926 /* video switching not supported on R30, R31 */ 4927 video_supported = TPACPI_VIDEO_NONE; 4928 else if (tpacpi_is_ibm() && 4929 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4930 /* 570 */ 4931 video_supported = TPACPI_VIDEO_570; 4932 else if (tpacpi_is_ibm() && 4933 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4934 /* 600e/x, 770e, 770x */ 4935 video_supported = TPACPI_VIDEO_770; 4936 else 4937 /* all others */ 4938 video_supported = TPACPI_VIDEO_NEW; 4939 4940 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4941 str_supported(video_supported != TPACPI_VIDEO_NONE), 4942 video_supported); 4943 4944 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 4945 } 4946 4947 static void video_exit(void) 4948 { 4949 dbg_printk(TPACPI_DBG_EXIT, 4950 "restoring original video autoswitch mode\n"); 4951 if (video_autosw_set(video_orig_autosw)) 4952 pr_err("error while trying to restore original video autoswitch mode\n"); 4953 } 4954 4955 static int video_outputsw_get(void) 4956 { 4957 int status = 0; 4958 int i; 4959 4960 switch (video_supported) { 4961 case TPACPI_VIDEO_570: 4962 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4963 TP_ACPI_VIDEO_570_PHSCMD)) 4964 return -EIO; 4965 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4966 break; 4967 case TPACPI_VIDEO_770: 4968 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4969 return -EIO; 4970 if (i) 4971 status |= TP_ACPI_VIDEO_S_LCD; 4972 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4973 return -EIO; 4974 if (i) 4975 status |= TP_ACPI_VIDEO_S_CRT; 4976 break; 4977 case TPACPI_VIDEO_NEW: 4978 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4979 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4980 return -EIO; 4981 if (i) 4982 status |= TP_ACPI_VIDEO_S_CRT; 4983 4984 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4985 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4986 return -EIO; 4987 if (i) 4988 status |= TP_ACPI_VIDEO_S_LCD; 4989 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4990 return -EIO; 4991 if (i) 4992 status |= TP_ACPI_VIDEO_S_DVI; 4993 break; 4994 default: 4995 return -ENOSYS; 4996 } 4997 4998 return status; 4999 } 5000 5001 static int video_outputsw_set(int status) 5002 { 5003 int autosw; 5004 int res = 0; 5005 5006 switch (video_supported) { 5007 case TPACPI_VIDEO_570: 5008 res = acpi_evalf(NULL, NULL, 5009 "\\_SB.PHS2", "vdd", 5010 TP_ACPI_VIDEO_570_PHS2CMD, 5011 status | TP_ACPI_VIDEO_570_PHS2SET); 5012 break; 5013 case TPACPI_VIDEO_770: 5014 autosw = video_autosw_get(); 5015 if (autosw < 0) 5016 return autosw; 5017 5018 res = video_autosw_set(1); 5019 if (res) 5020 return res; 5021 res = acpi_evalf(vid_handle, NULL, 5022 "ASWT", "vdd", status * 0x100, 0); 5023 if (!autosw && video_autosw_set(autosw)) { 5024 pr_err("video auto-switch left enabled due to error\n"); 5025 return -EIO; 5026 } 5027 break; 5028 case TPACPI_VIDEO_NEW: 5029 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 5030 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 5031 break; 5032 default: 5033 return -ENOSYS; 5034 } 5035 5036 return (res) ? 0 : -EIO; 5037 } 5038 5039 static int video_autosw_get(void) 5040 { 5041 int autosw = 0; 5042 5043 switch (video_supported) { 5044 case TPACPI_VIDEO_570: 5045 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 5046 return -EIO; 5047 break; 5048 case TPACPI_VIDEO_770: 5049 case TPACPI_VIDEO_NEW: 5050 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 5051 return -EIO; 5052 break; 5053 default: 5054 return -ENOSYS; 5055 } 5056 5057 return autosw & 1; 5058 } 5059 5060 static int video_autosw_set(int enable) 5061 { 5062 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 5063 return -EIO; 5064 return 0; 5065 } 5066 5067 static int video_outputsw_cycle(void) 5068 { 5069 int autosw = video_autosw_get(); 5070 int res; 5071 5072 if (autosw < 0) 5073 return autosw; 5074 5075 switch (video_supported) { 5076 case TPACPI_VIDEO_570: 5077 res = video_autosw_set(1); 5078 if (res) 5079 return res; 5080 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 5081 break; 5082 case TPACPI_VIDEO_770: 5083 case TPACPI_VIDEO_NEW: 5084 res = video_autosw_set(1); 5085 if (res) 5086 return res; 5087 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 5088 break; 5089 default: 5090 return -ENOSYS; 5091 } 5092 if (!autosw && video_autosw_set(autosw)) { 5093 pr_err("video auto-switch left enabled due to error\n"); 5094 return -EIO; 5095 } 5096 5097 return (res) ? 0 : -EIO; 5098 } 5099 5100 static int video_expand_toggle(void) 5101 { 5102 switch (video_supported) { 5103 case TPACPI_VIDEO_570: 5104 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 5105 0 : -EIO; 5106 case TPACPI_VIDEO_770: 5107 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 5108 0 : -EIO; 5109 case TPACPI_VIDEO_NEW: 5110 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 5111 0 : -EIO; 5112 default: 5113 return -ENOSYS; 5114 } 5115 /* not reached */ 5116 } 5117 5118 static int video_read(struct seq_file *m) 5119 { 5120 int status, autosw; 5121 5122 if (video_supported == TPACPI_VIDEO_NONE) { 5123 seq_printf(m, "status:\t\tnot supported\n"); 5124 return 0; 5125 } 5126 5127 /* Even reads can crash X.org, so... */ 5128 if (!capable(CAP_SYS_ADMIN)) 5129 return -EPERM; 5130 5131 status = video_outputsw_get(); 5132 if (status < 0) 5133 return status; 5134 5135 autosw = video_autosw_get(); 5136 if (autosw < 0) 5137 return autosw; 5138 5139 seq_printf(m, "status:\t\tsupported\n"); 5140 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 5141 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 5142 if (video_supported == TPACPI_VIDEO_NEW) 5143 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 5144 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 5145 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5146 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5147 if (video_supported == TPACPI_VIDEO_NEW) 5148 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5149 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5150 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5151 5152 return 0; 5153 } 5154 5155 static int video_write(char *buf) 5156 { 5157 char *cmd; 5158 int enable, disable, status; 5159 int res; 5160 5161 if (video_supported == TPACPI_VIDEO_NONE) 5162 return -ENODEV; 5163 5164 /* Even reads can crash X.org, let alone writes... */ 5165 if (!capable(CAP_SYS_ADMIN)) 5166 return -EPERM; 5167 5168 enable = 0; 5169 disable = 0; 5170 5171 while ((cmd = next_cmd(&buf))) { 5172 if (strlencmp(cmd, "lcd_enable") == 0) { 5173 enable |= TP_ACPI_VIDEO_S_LCD; 5174 } else if (strlencmp(cmd, "lcd_disable") == 0) { 5175 disable |= TP_ACPI_VIDEO_S_LCD; 5176 } else if (strlencmp(cmd, "crt_enable") == 0) { 5177 enable |= TP_ACPI_VIDEO_S_CRT; 5178 } else if (strlencmp(cmd, "crt_disable") == 0) { 5179 disable |= TP_ACPI_VIDEO_S_CRT; 5180 } else if (video_supported == TPACPI_VIDEO_NEW && 5181 strlencmp(cmd, "dvi_enable") == 0) { 5182 enable |= TP_ACPI_VIDEO_S_DVI; 5183 } else if (video_supported == TPACPI_VIDEO_NEW && 5184 strlencmp(cmd, "dvi_disable") == 0) { 5185 disable |= TP_ACPI_VIDEO_S_DVI; 5186 } else if (strlencmp(cmd, "auto_enable") == 0) { 5187 res = video_autosw_set(1); 5188 if (res) 5189 return res; 5190 } else if (strlencmp(cmd, "auto_disable") == 0) { 5191 res = video_autosw_set(0); 5192 if (res) 5193 return res; 5194 } else if (strlencmp(cmd, "video_switch") == 0) { 5195 res = video_outputsw_cycle(); 5196 if (res) 5197 return res; 5198 } else if (strlencmp(cmd, "expand_toggle") == 0) { 5199 res = video_expand_toggle(); 5200 if (res) 5201 return res; 5202 } else 5203 return -EINVAL; 5204 } 5205 5206 if (enable || disable) { 5207 status = video_outputsw_get(); 5208 if (status < 0) 5209 return status; 5210 res = video_outputsw_set((status & ~disable) | enable); 5211 if (res) 5212 return res; 5213 } 5214 5215 return 0; 5216 } 5217 5218 static struct ibm_struct video_driver_data = { 5219 .name = "video", 5220 .read = video_read, 5221 .write = video_write, 5222 .exit = video_exit, 5223 }; 5224 5225 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5226 5227 /************************************************************************* 5228 * Keyboard backlight subdriver 5229 */ 5230 5231 static enum led_brightness kbdlight_brightness; 5232 static DEFINE_MUTEX(kbdlight_mutex); 5233 5234 static int kbdlight_set_level(int level) 5235 { 5236 int ret = 0; 5237 5238 if (!hkey_handle) 5239 return -ENXIO; 5240 5241 mutex_lock(&kbdlight_mutex); 5242 5243 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5244 ret = -EIO; 5245 else 5246 kbdlight_brightness = level; 5247 5248 mutex_unlock(&kbdlight_mutex); 5249 5250 return ret; 5251 } 5252 5253 static int kbdlight_get_level(void) 5254 { 5255 int status = 0; 5256 5257 if (!hkey_handle) 5258 return -ENXIO; 5259 5260 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5261 return -EIO; 5262 5263 if (status < 0) 5264 return status; 5265 5266 return status & 0x3; 5267 } 5268 5269 static bool kbdlight_is_supported(void) 5270 { 5271 int status = 0; 5272 5273 if (!hkey_handle) 5274 return false; 5275 5276 if (!acpi_has_method(hkey_handle, "MLCG")) { 5277 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5278 return false; 5279 } 5280 5281 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5282 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5283 return false; 5284 } 5285 5286 if (status < 0) { 5287 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5288 return false; 5289 } 5290 5291 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5292 /* 5293 * Guessed test for keyboard backlight: 5294 * 5295 * Machines with backlight keyboard return: 5296 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5297 * b110100010010000000XX - ThinkPad x230 5298 * b010100000010000000XX - ThinkPad x240 5299 * b010100000010000000XX - ThinkPad W541 5300 * (XX is current backlight level) 5301 * 5302 * Machines without backlight keyboard return: 5303 * b10100001000000000000 - ThinkPad x230 5304 * b10110001000000000000 - ThinkPad E430 5305 * b00000000000000000000 - ThinkPad E450 5306 * 5307 * Candidate BITs for detection test (XOR): 5308 * b01000000001000000000 5309 * ^ 5310 */ 5311 return status & BIT(9); 5312 } 5313 5314 static int kbdlight_sysfs_set(struct led_classdev *led_cdev, 5315 enum led_brightness brightness) 5316 { 5317 return kbdlight_set_level(brightness); 5318 } 5319 5320 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5321 { 5322 int level; 5323 5324 level = kbdlight_get_level(); 5325 if (level < 0) 5326 return 0; 5327 5328 return level; 5329 } 5330 5331 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5332 .led_classdev = { 5333 .name = "tpacpi::kbd_backlight", 5334 .max_brightness = 2, 5335 .flags = LED_BRIGHT_HW_CHANGED, 5336 .brightness_set_blocking = &kbdlight_sysfs_set, 5337 .brightness_get = &kbdlight_sysfs_get, 5338 } 5339 }; 5340 5341 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5342 { 5343 int rc; 5344 5345 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5346 5347 TPACPI_ACPIHANDLE_INIT(hkey); 5348 5349 if (!kbdlight_is_supported()) { 5350 tp_features.kbdlight = 0; 5351 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5352 return 1; 5353 } 5354 5355 kbdlight_brightness = kbdlight_sysfs_get(NULL); 5356 tp_features.kbdlight = 1; 5357 5358 rc = led_classdev_register(&tpacpi_pdev->dev, 5359 &tpacpi_led_kbdlight.led_classdev); 5360 if (rc < 0) { 5361 tp_features.kbdlight = 0; 5362 return rc; 5363 } 5364 5365 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask | 5366 TP_ACPI_HKEY_KBD_LIGHT_MASK); 5367 return 0; 5368 } 5369 5370 static void kbdlight_exit(void) 5371 { 5372 if (tp_features.kbdlight) 5373 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5374 } 5375 5376 static int kbdlight_set_level_and_update(int level) 5377 { 5378 int ret; 5379 struct led_classdev *led_cdev; 5380 5381 ret = kbdlight_set_level(level); 5382 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5383 5384 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5385 led_cdev->brightness = level; 5386 5387 return ret; 5388 } 5389 5390 static int kbdlight_read(struct seq_file *m) 5391 { 5392 int level; 5393 5394 if (!tp_features.kbdlight) { 5395 seq_printf(m, "status:\t\tnot supported\n"); 5396 } else { 5397 level = kbdlight_get_level(); 5398 if (level < 0) 5399 seq_printf(m, "status:\t\terror %d\n", level); 5400 else 5401 seq_printf(m, "status:\t\t%d\n", level); 5402 seq_printf(m, "commands:\t0, 1, 2\n"); 5403 } 5404 5405 return 0; 5406 } 5407 5408 static int kbdlight_write(char *buf) 5409 { 5410 char *cmd; 5411 int level = -1; 5412 5413 if (!tp_features.kbdlight) 5414 return -ENODEV; 5415 5416 while ((cmd = next_cmd(&buf))) { 5417 if (strlencmp(cmd, "0") == 0) 5418 level = 0; 5419 else if (strlencmp(cmd, "1") == 0) 5420 level = 1; 5421 else if (strlencmp(cmd, "2") == 0) 5422 level = 2; 5423 else 5424 return -EINVAL; 5425 } 5426 5427 if (level == -1) 5428 return -EINVAL; 5429 5430 return kbdlight_set_level_and_update(level); 5431 } 5432 5433 static void kbdlight_suspend(void) 5434 { 5435 struct led_classdev *led_cdev; 5436 5437 if (!tp_features.kbdlight) 5438 return; 5439 5440 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5441 led_update_brightness(led_cdev); 5442 led_classdev_suspend(led_cdev); 5443 } 5444 5445 static void kbdlight_resume(void) 5446 { 5447 if (!tp_features.kbdlight) 5448 return; 5449 5450 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5451 } 5452 5453 static struct ibm_struct kbdlight_driver_data = { 5454 .name = "kbdlight", 5455 .read = kbdlight_read, 5456 .write = kbdlight_write, 5457 .suspend = kbdlight_suspend, 5458 .resume = kbdlight_resume, 5459 .exit = kbdlight_exit, 5460 }; 5461 5462 /************************************************************************* 5463 * Light (thinklight) subdriver 5464 */ 5465 5466 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5467 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5468 5469 static int light_get_status(void) 5470 { 5471 int status = 0; 5472 5473 if (tp_features.light_status) { 5474 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5475 return -EIO; 5476 return (!!status); 5477 } 5478 5479 return -ENXIO; 5480 } 5481 5482 static int light_set_status(int status) 5483 { 5484 int rc; 5485 5486 if (tp_features.light) { 5487 if (cmos_handle) { 5488 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5489 (status) ? 5490 TP_CMOS_THINKLIGHT_ON : 5491 TP_CMOS_THINKLIGHT_OFF); 5492 } else { 5493 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5494 (status) ? 1 : 0); 5495 } 5496 return (rc) ? 0 : -EIO; 5497 } 5498 5499 return -ENXIO; 5500 } 5501 5502 static int light_sysfs_set(struct led_classdev *led_cdev, 5503 enum led_brightness brightness) 5504 { 5505 return light_set_status((brightness != LED_OFF) ? 5506 TPACPI_LED_ON : TPACPI_LED_OFF); 5507 } 5508 5509 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5510 { 5511 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5512 } 5513 5514 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5515 .led_classdev = { 5516 .name = "tpacpi::thinklight", 5517 .brightness_set_blocking = &light_sysfs_set, 5518 .brightness_get = &light_sysfs_get, 5519 } 5520 }; 5521 5522 static int __init light_init(struct ibm_init_struct *iibm) 5523 { 5524 int rc; 5525 5526 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5527 5528 if (tpacpi_is_ibm()) { 5529 TPACPI_ACPIHANDLE_INIT(ledb); 5530 TPACPI_ACPIHANDLE_INIT(lght); 5531 } 5532 TPACPI_ACPIHANDLE_INIT(cmos); 5533 5534 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5535 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5536 5537 if (tp_features.light) 5538 /* light status not supported on 5539 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5540 tp_features.light_status = 5541 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5542 5543 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5544 str_supported(tp_features.light), 5545 str_supported(tp_features.light_status)); 5546 5547 if (!tp_features.light) 5548 return 1; 5549 5550 rc = led_classdev_register(&tpacpi_pdev->dev, 5551 &tpacpi_led_thinklight.led_classdev); 5552 5553 if (rc < 0) { 5554 tp_features.light = 0; 5555 tp_features.light_status = 0; 5556 } else { 5557 rc = 0; 5558 } 5559 5560 return rc; 5561 } 5562 5563 static void light_exit(void) 5564 { 5565 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5566 } 5567 5568 static int light_read(struct seq_file *m) 5569 { 5570 int status; 5571 5572 if (!tp_features.light) { 5573 seq_printf(m, "status:\t\tnot supported\n"); 5574 } else if (!tp_features.light_status) { 5575 seq_printf(m, "status:\t\tunknown\n"); 5576 seq_printf(m, "commands:\ton, off\n"); 5577 } else { 5578 status = light_get_status(); 5579 if (status < 0) 5580 return status; 5581 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5582 seq_printf(m, "commands:\ton, off\n"); 5583 } 5584 5585 return 0; 5586 } 5587 5588 static int light_write(char *buf) 5589 { 5590 char *cmd; 5591 int newstatus = 0; 5592 5593 if (!tp_features.light) 5594 return -ENODEV; 5595 5596 while ((cmd = next_cmd(&buf))) { 5597 if (strlencmp(cmd, "on") == 0) { 5598 newstatus = 1; 5599 } else if (strlencmp(cmd, "off") == 0) { 5600 newstatus = 0; 5601 } else 5602 return -EINVAL; 5603 } 5604 5605 return light_set_status(newstatus); 5606 } 5607 5608 static struct ibm_struct light_driver_data = { 5609 .name = "light", 5610 .read = light_read, 5611 .write = light_write, 5612 .exit = light_exit, 5613 }; 5614 5615 /************************************************************************* 5616 * CMOS subdriver 5617 */ 5618 5619 /* sysfs cmos_command -------------------------------------------------- */ 5620 static ssize_t cmos_command_store(struct device *dev, 5621 struct device_attribute *attr, 5622 const char *buf, size_t count) 5623 { 5624 unsigned long cmos_cmd; 5625 int res; 5626 5627 if (parse_strtoul(buf, 21, &cmos_cmd)) 5628 return -EINVAL; 5629 5630 res = issue_thinkpad_cmos_command(cmos_cmd); 5631 return (res) ? res : count; 5632 } 5633 5634 static DEVICE_ATTR_WO(cmos_command); 5635 5636 /* --------------------------------------------------------------------- */ 5637 5638 static int __init cmos_init(struct ibm_init_struct *iibm) 5639 { 5640 int res; 5641 5642 vdbg_printk(TPACPI_DBG_INIT, 5643 "initializing cmos commands subdriver\n"); 5644 5645 TPACPI_ACPIHANDLE_INIT(cmos); 5646 5647 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5648 str_supported(cmos_handle != NULL)); 5649 5650 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5651 if (res) 5652 return res; 5653 5654 return (cmos_handle) ? 0 : 1; 5655 } 5656 5657 static void cmos_exit(void) 5658 { 5659 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5660 } 5661 5662 static int cmos_read(struct seq_file *m) 5663 { 5664 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5665 R30, R31, T20-22, X20-21 */ 5666 if (!cmos_handle) 5667 seq_printf(m, "status:\t\tnot supported\n"); 5668 else { 5669 seq_printf(m, "status:\t\tsupported\n"); 5670 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5671 } 5672 5673 return 0; 5674 } 5675 5676 static int cmos_write(char *buf) 5677 { 5678 char *cmd; 5679 int cmos_cmd, res; 5680 5681 while ((cmd = next_cmd(&buf))) { 5682 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5683 cmos_cmd >= 0 && cmos_cmd <= 21) { 5684 /* cmos_cmd set */ 5685 } else 5686 return -EINVAL; 5687 5688 res = issue_thinkpad_cmos_command(cmos_cmd); 5689 if (res) 5690 return res; 5691 } 5692 5693 return 0; 5694 } 5695 5696 static struct ibm_struct cmos_driver_data = { 5697 .name = "cmos", 5698 .read = cmos_read, 5699 .write = cmos_write, 5700 .exit = cmos_exit, 5701 }; 5702 5703 /************************************************************************* 5704 * LED subdriver 5705 */ 5706 5707 enum led_access_mode { 5708 TPACPI_LED_NONE = 0, 5709 TPACPI_LED_570, /* 570 */ 5710 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5711 TPACPI_LED_NEW, /* all others */ 5712 }; 5713 5714 enum { /* For TPACPI_LED_OLD */ 5715 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5716 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5717 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5718 }; 5719 5720 static enum led_access_mode led_supported; 5721 5722 static acpi_handle led_handle; 5723 5724 #define TPACPI_LED_NUMLEDS 16 5725 static struct tpacpi_led_classdev *tpacpi_leds; 5726 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5727 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5728 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5729 "tpacpi::power", 5730 "tpacpi:orange:batt", 5731 "tpacpi:green:batt", 5732 "tpacpi::dock_active", 5733 "tpacpi::bay_active", 5734 "tpacpi::dock_batt", 5735 "tpacpi::unknown_led", 5736 "tpacpi::standby", 5737 "tpacpi::dock_status1", 5738 "tpacpi::dock_status2", 5739 "tpacpi::unknown_led2", 5740 "tpacpi::unknown_led3", 5741 "tpacpi::thinkvantage", 5742 }; 5743 #define TPACPI_SAFE_LEDS 0x1081U 5744 5745 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5746 { 5747 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5748 return false; 5749 #else 5750 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5751 #endif 5752 } 5753 5754 static int led_get_status(const unsigned int led) 5755 { 5756 int status; 5757 enum led_status_t led_s; 5758 5759 switch (led_supported) { 5760 case TPACPI_LED_570: 5761 if (!acpi_evalf(ec_handle, 5762 &status, "GLED", "dd", 1 << led)) 5763 return -EIO; 5764 led_s = (status == 0) ? 5765 TPACPI_LED_OFF : 5766 ((status == 1) ? 5767 TPACPI_LED_ON : 5768 TPACPI_LED_BLINK); 5769 tpacpi_led_state_cache[led] = led_s; 5770 return led_s; 5771 default: 5772 return -ENXIO; 5773 } 5774 5775 /* not reached */ 5776 } 5777 5778 static int led_set_status(const unsigned int led, 5779 const enum led_status_t ledstatus) 5780 { 5781 /* off, on, blink. Index is led_status_t */ 5782 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5783 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5784 5785 int rc = 0; 5786 5787 switch (led_supported) { 5788 case TPACPI_LED_570: 5789 /* 570 */ 5790 if (unlikely(led > 7)) 5791 return -EINVAL; 5792 if (unlikely(tpacpi_is_led_restricted(led))) 5793 return -EPERM; 5794 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5795 (1 << led), led_sled_arg1[ledstatus])) 5796 rc = -EIO; 5797 break; 5798 case TPACPI_LED_OLD: 5799 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5800 if (unlikely(led > 7)) 5801 return -EINVAL; 5802 if (unlikely(tpacpi_is_led_restricted(led))) 5803 return -EPERM; 5804 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5805 if (rc >= 0) 5806 rc = ec_write(TPACPI_LED_EC_HLBL, 5807 (ledstatus == TPACPI_LED_BLINK) << led); 5808 if (rc >= 0) 5809 rc = ec_write(TPACPI_LED_EC_HLCL, 5810 (ledstatus != TPACPI_LED_OFF) << led); 5811 break; 5812 case TPACPI_LED_NEW: 5813 /* all others */ 5814 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5815 return -EINVAL; 5816 if (unlikely(tpacpi_is_led_restricted(led))) 5817 return -EPERM; 5818 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5819 led, led_led_arg1[ledstatus])) 5820 rc = -EIO; 5821 break; 5822 default: 5823 rc = -ENXIO; 5824 } 5825 5826 if (!rc) 5827 tpacpi_led_state_cache[led] = ledstatus; 5828 5829 return rc; 5830 } 5831 5832 static int led_sysfs_set(struct led_classdev *led_cdev, 5833 enum led_brightness brightness) 5834 { 5835 struct tpacpi_led_classdev *data = container_of(led_cdev, 5836 struct tpacpi_led_classdev, led_classdev); 5837 enum led_status_t new_state; 5838 5839 if (brightness == LED_OFF) 5840 new_state = TPACPI_LED_OFF; 5841 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5842 new_state = TPACPI_LED_ON; 5843 else 5844 new_state = TPACPI_LED_BLINK; 5845 5846 return led_set_status(data->led, new_state); 5847 } 5848 5849 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5850 unsigned long *delay_on, unsigned long *delay_off) 5851 { 5852 struct tpacpi_led_classdev *data = container_of(led_cdev, 5853 struct tpacpi_led_classdev, led_classdev); 5854 5855 /* Can we choose the flash rate? */ 5856 if (*delay_on == 0 && *delay_off == 0) { 5857 /* yes. set them to the hardware blink rate (1 Hz) */ 5858 *delay_on = 500; /* ms */ 5859 *delay_off = 500; /* ms */ 5860 } else if ((*delay_on != 500) || (*delay_off != 500)) 5861 return -EINVAL; 5862 5863 return led_set_status(data->led, TPACPI_LED_BLINK); 5864 } 5865 5866 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5867 { 5868 int rc; 5869 5870 struct tpacpi_led_classdev *data = container_of(led_cdev, 5871 struct tpacpi_led_classdev, led_classdev); 5872 5873 rc = led_get_status(data->led); 5874 5875 if (rc == TPACPI_LED_OFF || rc < 0) 5876 rc = LED_OFF; /* no error handling in led class :( */ 5877 else 5878 rc = LED_FULL; 5879 5880 return rc; 5881 } 5882 5883 static void led_exit(void) 5884 { 5885 unsigned int i; 5886 5887 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5888 if (tpacpi_leds[i].led_classdev.name) 5889 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5890 } 5891 5892 kfree(tpacpi_leds); 5893 } 5894 5895 static int __init tpacpi_init_led(unsigned int led) 5896 { 5897 int rc; 5898 5899 tpacpi_leds[led].led = led; 5900 5901 /* LEDs with no name don't get registered */ 5902 if (!tpacpi_led_names[led]) 5903 return 0; 5904 5905 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set; 5906 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5907 if (led_supported == TPACPI_LED_570) 5908 tpacpi_leds[led].led_classdev.brightness_get = 5909 &led_sysfs_get; 5910 5911 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5912 5913 rc = led_classdev_register(&tpacpi_pdev->dev, 5914 &tpacpi_leds[led].led_classdev); 5915 if (rc < 0) 5916 tpacpi_leds[led].led_classdev.name = NULL; 5917 5918 return rc; 5919 } 5920 5921 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5922 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5923 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5924 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5925 5926 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5927 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5928 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5929 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5930 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5931 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5932 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5933 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5934 5935 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5936 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5937 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5938 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5939 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5940 5941 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5942 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5943 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5944 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5945 5946 /* (1) - may have excess leds enabled on MSB */ 5947 5948 /* Defaults (order matters, keep last, don't reorder!) */ 5949 { /* Lenovo */ 5950 .vendor = PCI_VENDOR_ID_LENOVO, 5951 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5952 .quirks = 0x1fffU, 5953 }, 5954 { /* IBM ThinkPads with no EC version string */ 5955 .vendor = PCI_VENDOR_ID_IBM, 5956 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5957 .quirks = 0x00ffU, 5958 }, 5959 { /* IBM ThinkPads with EC version string */ 5960 .vendor = PCI_VENDOR_ID_IBM, 5961 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5962 .quirks = 0x00bfU, 5963 }, 5964 }; 5965 5966 #undef TPACPI_LEDQ_IBM 5967 #undef TPACPI_LEDQ_LNV 5968 5969 static enum led_access_mode __init led_init_detect_mode(void) 5970 { 5971 acpi_status status; 5972 5973 if (tpacpi_is_ibm()) { 5974 /* 570 */ 5975 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5976 if (ACPI_SUCCESS(status)) 5977 return TPACPI_LED_570; 5978 5979 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5980 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5981 if (ACPI_SUCCESS(status)) 5982 return TPACPI_LED_OLD; 5983 } 5984 5985 /* most others */ 5986 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5987 if (ACPI_SUCCESS(status)) 5988 return TPACPI_LED_NEW; 5989 5990 /* R30, R31, and unknown firmwares */ 5991 led_handle = NULL; 5992 return TPACPI_LED_NONE; 5993 } 5994 5995 static int __init led_init(struct ibm_init_struct *iibm) 5996 { 5997 unsigned int i; 5998 int rc; 5999 unsigned long useful_leds; 6000 6001 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 6002 6003 led_supported = led_init_detect_mode(); 6004 6005 if (led_supported != TPACPI_LED_NONE) { 6006 useful_leds = tpacpi_check_quirks(led_useful_qtable, 6007 ARRAY_SIZE(led_useful_qtable)); 6008 6009 if (!useful_leds) { 6010 led_handle = NULL; 6011 led_supported = TPACPI_LED_NONE; 6012 } 6013 } 6014 6015 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 6016 str_supported(led_supported), led_supported); 6017 6018 if (led_supported == TPACPI_LED_NONE) 6019 return 1; 6020 6021 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds), 6022 GFP_KERNEL); 6023 if (!tpacpi_leds) { 6024 pr_err("Out of memory for LED data\n"); 6025 return -ENOMEM; 6026 } 6027 6028 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 6029 tpacpi_leds[i].led = -1; 6030 6031 if (!tpacpi_is_led_restricted(i) && 6032 test_bit(i, &useful_leds)) { 6033 rc = tpacpi_init_led(i); 6034 if (rc < 0) { 6035 led_exit(); 6036 return rc; 6037 } 6038 } 6039 } 6040 6041 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 6042 pr_notice("warning: userspace override of important firmware LEDs is enabled\n"); 6043 #endif 6044 return 0; 6045 } 6046 6047 #define str_led_status(s) \ 6048 ((s) == TPACPI_LED_OFF ? "off" : \ 6049 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 6050 6051 static int led_read(struct seq_file *m) 6052 { 6053 if (!led_supported) { 6054 seq_printf(m, "status:\t\tnot supported\n"); 6055 return 0; 6056 } 6057 seq_printf(m, "status:\t\tsupported\n"); 6058 6059 if (led_supported == TPACPI_LED_570) { 6060 /* 570 */ 6061 int i, status; 6062 for (i = 0; i < 8; i++) { 6063 status = led_get_status(i); 6064 if (status < 0) 6065 return -EIO; 6066 seq_printf(m, "%d:\t\t%s\n", 6067 i, str_led_status(status)); 6068 } 6069 } 6070 6071 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 6072 6073 return 0; 6074 } 6075 6076 static int led_write(char *buf) 6077 { 6078 char *cmd; 6079 int led, rc; 6080 enum led_status_t s; 6081 6082 if (!led_supported) 6083 return -ENODEV; 6084 6085 while ((cmd = next_cmd(&buf))) { 6086 if (sscanf(cmd, "%d", &led) != 1) 6087 return -EINVAL; 6088 6089 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 6090 tpacpi_leds[led].led < 0) 6091 return -ENODEV; 6092 6093 if (strstr(cmd, "off")) { 6094 s = TPACPI_LED_OFF; 6095 } else if (strstr(cmd, "on")) { 6096 s = TPACPI_LED_ON; 6097 } else if (strstr(cmd, "blink")) { 6098 s = TPACPI_LED_BLINK; 6099 } else { 6100 return -EINVAL; 6101 } 6102 6103 rc = led_set_status(led, s); 6104 if (rc < 0) 6105 return rc; 6106 } 6107 6108 return 0; 6109 } 6110 6111 static struct ibm_struct led_driver_data = { 6112 .name = "led", 6113 .read = led_read, 6114 .write = led_write, 6115 .exit = led_exit, 6116 }; 6117 6118 /************************************************************************* 6119 * Beep subdriver 6120 */ 6121 6122 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 6123 6124 #define TPACPI_BEEP_Q1 0x0001 6125 6126 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 6127 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 6128 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 6129 }; 6130 6131 static int __init beep_init(struct ibm_init_struct *iibm) 6132 { 6133 unsigned long quirks; 6134 6135 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 6136 6137 TPACPI_ACPIHANDLE_INIT(beep); 6138 6139 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 6140 str_supported(beep_handle != NULL)); 6141 6142 quirks = tpacpi_check_quirks(beep_quirk_table, 6143 ARRAY_SIZE(beep_quirk_table)); 6144 6145 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6146 6147 return (beep_handle) ? 0 : 1; 6148 } 6149 6150 static int beep_read(struct seq_file *m) 6151 { 6152 if (!beep_handle) 6153 seq_printf(m, "status:\t\tnot supported\n"); 6154 else { 6155 seq_printf(m, "status:\t\tsupported\n"); 6156 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6157 } 6158 6159 return 0; 6160 } 6161 6162 static int beep_write(char *buf) 6163 { 6164 char *cmd; 6165 int beep_cmd; 6166 6167 if (!beep_handle) 6168 return -ENODEV; 6169 6170 while ((cmd = next_cmd(&buf))) { 6171 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6172 beep_cmd >= 0 && beep_cmd <= 17) { 6173 /* beep_cmd set */ 6174 } else 6175 return -EINVAL; 6176 if (tp_features.beep_needs_two_args) { 6177 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6178 beep_cmd, 0)) 6179 return -EIO; 6180 } else { 6181 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6182 beep_cmd)) 6183 return -EIO; 6184 } 6185 } 6186 6187 return 0; 6188 } 6189 6190 static struct ibm_struct beep_driver_data = { 6191 .name = "beep", 6192 .read = beep_read, 6193 .write = beep_write, 6194 }; 6195 6196 /************************************************************************* 6197 * Thermal subdriver 6198 */ 6199 6200 enum thermal_access_mode { 6201 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6202 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6203 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6204 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6205 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6206 }; 6207 6208 enum { /* TPACPI_THERMAL_TPEC_* */ 6209 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6210 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6211 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6212 6213 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6214 }; 6215 6216 6217 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6218 struct ibm_thermal_sensors_struct { 6219 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6220 }; 6221 6222 static enum thermal_access_mode thermal_read_mode; 6223 6224 /* idx is zero-based */ 6225 static int thermal_get_sensor(int idx, s32 *value) 6226 { 6227 int t; 6228 s8 tmp; 6229 char tmpi[5]; 6230 6231 t = TP_EC_THERMAL_TMP0; 6232 6233 switch (thermal_read_mode) { 6234 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6235 case TPACPI_THERMAL_TPEC_16: 6236 if (idx >= 8 && idx <= 15) { 6237 t = TP_EC_THERMAL_TMP8; 6238 idx -= 8; 6239 } 6240 /* fallthrough */ 6241 #endif 6242 case TPACPI_THERMAL_TPEC_8: 6243 if (idx <= 7) { 6244 if (!acpi_ec_read(t + idx, &tmp)) 6245 return -EIO; 6246 *value = tmp * 1000; 6247 return 0; 6248 } 6249 break; 6250 6251 case TPACPI_THERMAL_ACPI_UPDT: 6252 if (idx <= 7) { 6253 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6254 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6255 return -EIO; 6256 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6257 return -EIO; 6258 *value = (t - 2732) * 100; 6259 return 0; 6260 } 6261 break; 6262 6263 case TPACPI_THERMAL_ACPI_TMP07: 6264 if (idx <= 7) { 6265 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6266 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6267 return -EIO; 6268 if (t > 127 || t < -127) 6269 t = TP_EC_THERMAL_TMP_NA; 6270 *value = t * 1000; 6271 return 0; 6272 } 6273 break; 6274 6275 case TPACPI_THERMAL_NONE: 6276 default: 6277 return -ENOSYS; 6278 } 6279 6280 return -EINVAL; 6281 } 6282 6283 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6284 { 6285 int res, i; 6286 int n; 6287 6288 n = 8; 6289 i = 0; 6290 6291 if (!s) 6292 return -EINVAL; 6293 6294 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6295 n = 16; 6296 6297 for (i = 0 ; i < n; i++) { 6298 res = thermal_get_sensor(i, &s->temp[i]); 6299 if (res) 6300 return res; 6301 } 6302 6303 return n; 6304 } 6305 6306 static void thermal_dump_all_sensors(void) 6307 { 6308 int n, i; 6309 struct ibm_thermal_sensors_struct t; 6310 6311 n = thermal_get_sensors(&t); 6312 if (n <= 0) 6313 return; 6314 6315 pr_notice("temperatures (Celsius):"); 6316 6317 for (i = 0; i < n; i++) { 6318 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6319 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6320 else 6321 pr_cont(" N/A"); 6322 } 6323 6324 pr_cont("\n"); 6325 } 6326 6327 /* sysfs temp##_input -------------------------------------------------- */ 6328 6329 static ssize_t thermal_temp_input_show(struct device *dev, 6330 struct device_attribute *attr, 6331 char *buf) 6332 { 6333 struct sensor_device_attribute *sensor_attr = 6334 to_sensor_dev_attr(attr); 6335 int idx = sensor_attr->index; 6336 s32 value; 6337 int res; 6338 6339 res = thermal_get_sensor(idx, &value); 6340 if (res) 6341 return res; 6342 if (value == TPACPI_THERMAL_SENSOR_NA) 6343 return -ENXIO; 6344 6345 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6346 } 6347 6348 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6349 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6350 thermal_temp_input_show, NULL, _idxB) 6351 6352 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6353 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6354 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6355 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6356 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6357 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6358 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6359 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6360 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6361 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6362 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6363 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6364 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6365 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6366 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6367 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6368 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6369 }; 6370 6371 #define THERMAL_ATTRS(X) \ 6372 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6373 6374 static struct attribute *thermal_temp_input_attr[] = { 6375 THERMAL_ATTRS(8), 6376 THERMAL_ATTRS(9), 6377 THERMAL_ATTRS(10), 6378 THERMAL_ATTRS(11), 6379 THERMAL_ATTRS(12), 6380 THERMAL_ATTRS(13), 6381 THERMAL_ATTRS(14), 6382 THERMAL_ATTRS(15), 6383 THERMAL_ATTRS(0), 6384 THERMAL_ATTRS(1), 6385 THERMAL_ATTRS(2), 6386 THERMAL_ATTRS(3), 6387 THERMAL_ATTRS(4), 6388 THERMAL_ATTRS(5), 6389 THERMAL_ATTRS(6), 6390 THERMAL_ATTRS(7), 6391 NULL 6392 }; 6393 6394 static const struct attribute_group thermal_temp_input16_group = { 6395 .attrs = thermal_temp_input_attr 6396 }; 6397 6398 static const struct attribute_group thermal_temp_input8_group = { 6399 .attrs = &thermal_temp_input_attr[8] 6400 }; 6401 6402 #undef THERMAL_SENSOR_ATTR_TEMP 6403 #undef THERMAL_ATTRS 6404 6405 /* --------------------------------------------------------------------- */ 6406 6407 static int __init thermal_init(struct ibm_init_struct *iibm) 6408 { 6409 u8 t, ta1, ta2; 6410 int i; 6411 int acpi_tmp7; 6412 int res; 6413 6414 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6415 6416 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6417 6418 if (thinkpad_id.ec_model) { 6419 /* 6420 * Direct EC access mode: sensors at registers 6421 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6422 * non-implemented, thermal sensors return 0x80 when 6423 * not available 6424 */ 6425 6426 ta1 = ta2 = 0; 6427 for (i = 0; i < 8; i++) { 6428 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6429 ta1 |= t; 6430 } else { 6431 ta1 = 0; 6432 break; 6433 } 6434 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6435 ta2 |= t; 6436 } else { 6437 ta1 = 0; 6438 break; 6439 } 6440 } 6441 if (ta1 == 0) { 6442 /* This is sheer paranoia, but we handle it anyway */ 6443 if (acpi_tmp7) { 6444 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n"); 6445 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6446 } else { 6447 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n"); 6448 thermal_read_mode = TPACPI_THERMAL_NONE; 6449 } 6450 } else { 6451 thermal_read_mode = 6452 (ta2 != 0) ? 6453 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6454 } 6455 } else if (acpi_tmp7) { 6456 if (tpacpi_is_ibm() && 6457 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6458 /* 600e/x, 770e, 770x */ 6459 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6460 } else { 6461 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6462 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6463 } 6464 } else { 6465 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6466 thermal_read_mode = TPACPI_THERMAL_NONE; 6467 } 6468 6469 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6470 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6471 thermal_read_mode); 6472 6473 switch (thermal_read_mode) { 6474 case TPACPI_THERMAL_TPEC_16: 6475 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6476 &thermal_temp_input16_group); 6477 if (res) 6478 return res; 6479 break; 6480 case TPACPI_THERMAL_TPEC_8: 6481 case TPACPI_THERMAL_ACPI_TMP07: 6482 case TPACPI_THERMAL_ACPI_UPDT: 6483 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6484 &thermal_temp_input8_group); 6485 if (res) 6486 return res; 6487 break; 6488 case TPACPI_THERMAL_NONE: 6489 default: 6490 return 1; 6491 } 6492 6493 return 0; 6494 } 6495 6496 static void thermal_exit(void) 6497 { 6498 switch (thermal_read_mode) { 6499 case TPACPI_THERMAL_TPEC_16: 6500 sysfs_remove_group(&tpacpi_hwmon->kobj, 6501 &thermal_temp_input16_group); 6502 break; 6503 case TPACPI_THERMAL_TPEC_8: 6504 case TPACPI_THERMAL_ACPI_TMP07: 6505 case TPACPI_THERMAL_ACPI_UPDT: 6506 sysfs_remove_group(&tpacpi_hwmon->kobj, 6507 &thermal_temp_input8_group); 6508 break; 6509 case TPACPI_THERMAL_NONE: 6510 default: 6511 break; 6512 } 6513 } 6514 6515 static int thermal_read(struct seq_file *m) 6516 { 6517 int n, i; 6518 struct ibm_thermal_sensors_struct t; 6519 6520 n = thermal_get_sensors(&t); 6521 if (unlikely(n < 0)) 6522 return n; 6523 6524 seq_printf(m, "temperatures:\t"); 6525 6526 if (n > 0) { 6527 for (i = 0; i < (n - 1); i++) 6528 seq_printf(m, "%d ", t.temp[i] / 1000); 6529 seq_printf(m, "%d\n", t.temp[i] / 1000); 6530 } else 6531 seq_printf(m, "not supported\n"); 6532 6533 return 0; 6534 } 6535 6536 static struct ibm_struct thermal_driver_data = { 6537 .name = "thermal", 6538 .read = thermal_read, 6539 .exit = thermal_exit, 6540 }; 6541 6542 /************************************************************************* 6543 * Backlight/brightness subdriver 6544 */ 6545 6546 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6547 6548 /* 6549 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6550 * CMOS NVRAM byte 0x5E, bits 0-3. 6551 * 6552 * EC HBRV (0x31) has the following layout 6553 * Bit 7: unknown function 6554 * Bit 6: unknown function 6555 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6556 * Bit 4: must be set to zero to avoid problems 6557 * Bit 3-0: backlight brightness level 6558 * 6559 * brightness_get_raw returns status data in the HBRV layout 6560 * 6561 * WARNING: The X61 has been verified to use HBRV for something else, so 6562 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6563 * testing on the very early *60 Lenovo models... 6564 */ 6565 6566 enum { 6567 TP_EC_BACKLIGHT = 0x31, 6568 6569 /* TP_EC_BACKLIGHT bitmasks */ 6570 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6571 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6572 TP_EC_BACKLIGHT_MAPSW = 0x20, 6573 }; 6574 6575 enum tpacpi_brightness_access_mode { 6576 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6577 TPACPI_BRGHT_MODE_EC, /* EC control */ 6578 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6579 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6580 TPACPI_BRGHT_MODE_MAX 6581 }; 6582 6583 static struct backlight_device *ibm_backlight_device; 6584 6585 static enum tpacpi_brightness_access_mode brightness_mode = 6586 TPACPI_BRGHT_MODE_MAX; 6587 6588 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6589 6590 static struct mutex brightness_mutex; 6591 6592 /* NVRAM brightness access, 6593 * call with brightness_mutex held! */ 6594 static unsigned int tpacpi_brightness_nvram_get(void) 6595 { 6596 u8 lnvram; 6597 6598 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6599 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6600 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6601 lnvram &= bright_maxlvl; 6602 6603 return lnvram; 6604 } 6605 6606 static void tpacpi_brightness_checkpoint_nvram(void) 6607 { 6608 u8 lec = 0; 6609 u8 b_nvram; 6610 6611 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6612 return; 6613 6614 vdbg_printk(TPACPI_DBG_BRGHT, 6615 "trying to checkpoint backlight level to NVRAM...\n"); 6616 6617 if (mutex_lock_killable(&brightness_mutex) < 0) 6618 return; 6619 6620 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6621 goto unlock; 6622 lec &= TP_EC_BACKLIGHT_LVLMSK; 6623 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6624 6625 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6626 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6627 /* NVRAM needs update */ 6628 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6629 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6630 b_nvram |= lec; 6631 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6632 dbg_printk(TPACPI_DBG_BRGHT, 6633 "updated NVRAM backlight level to %u (0x%02x)\n", 6634 (unsigned int) lec, (unsigned int) b_nvram); 6635 } else 6636 vdbg_printk(TPACPI_DBG_BRGHT, 6637 "NVRAM backlight level already is %u (0x%02x)\n", 6638 (unsigned int) lec, (unsigned int) b_nvram); 6639 6640 unlock: 6641 mutex_unlock(&brightness_mutex); 6642 } 6643 6644 6645 /* call with brightness_mutex held! */ 6646 static int tpacpi_brightness_get_raw(int *status) 6647 { 6648 u8 lec = 0; 6649 6650 switch (brightness_mode) { 6651 case TPACPI_BRGHT_MODE_UCMS_STEP: 6652 *status = tpacpi_brightness_nvram_get(); 6653 return 0; 6654 case TPACPI_BRGHT_MODE_EC: 6655 case TPACPI_BRGHT_MODE_ECNVRAM: 6656 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6657 return -EIO; 6658 *status = lec; 6659 return 0; 6660 default: 6661 return -ENXIO; 6662 } 6663 } 6664 6665 /* call with brightness_mutex held! */ 6666 /* do NOT call with illegal backlight level value */ 6667 static int tpacpi_brightness_set_ec(unsigned int value) 6668 { 6669 u8 lec = 0; 6670 6671 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6672 return -EIO; 6673 6674 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6675 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6676 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6677 return -EIO; 6678 6679 return 0; 6680 } 6681 6682 /* call with brightness_mutex held! */ 6683 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6684 { 6685 int cmos_cmd, inc; 6686 unsigned int current_value, i; 6687 6688 current_value = tpacpi_brightness_nvram_get(); 6689 6690 if (value == current_value) 6691 return 0; 6692 6693 cmos_cmd = (value > current_value) ? 6694 TP_CMOS_BRIGHTNESS_UP : 6695 TP_CMOS_BRIGHTNESS_DOWN; 6696 inc = (value > current_value) ? 1 : -1; 6697 6698 for (i = current_value; i != value; i += inc) 6699 if (issue_thinkpad_cmos_command(cmos_cmd)) 6700 return -EIO; 6701 6702 return 0; 6703 } 6704 6705 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6706 static int brightness_set(unsigned int value) 6707 { 6708 int res; 6709 6710 if (value > bright_maxlvl) 6711 return -EINVAL; 6712 6713 vdbg_printk(TPACPI_DBG_BRGHT, 6714 "set backlight level to %d\n", value); 6715 6716 res = mutex_lock_killable(&brightness_mutex); 6717 if (res < 0) 6718 return res; 6719 6720 switch (brightness_mode) { 6721 case TPACPI_BRGHT_MODE_EC: 6722 case TPACPI_BRGHT_MODE_ECNVRAM: 6723 res = tpacpi_brightness_set_ec(value); 6724 break; 6725 case TPACPI_BRGHT_MODE_UCMS_STEP: 6726 res = tpacpi_brightness_set_ucmsstep(value); 6727 break; 6728 default: 6729 res = -ENXIO; 6730 } 6731 6732 mutex_unlock(&brightness_mutex); 6733 return res; 6734 } 6735 6736 /* sysfs backlight class ----------------------------------------------- */ 6737 6738 static int brightness_update_status(struct backlight_device *bd) 6739 { 6740 unsigned int level = 6741 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6742 bd->props.power == FB_BLANK_UNBLANK) ? 6743 bd->props.brightness : 0; 6744 6745 dbg_printk(TPACPI_DBG_BRGHT, 6746 "backlight: attempt to set level to %d\n", 6747 level); 6748 6749 /* it is the backlight class's job (caller) to handle 6750 * EINTR and other errors properly */ 6751 return brightness_set(level); 6752 } 6753 6754 static int brightness_get(struct backlight_device *bd) 6755 { 6756 int status, res; 6757 6758 res = mutex_lock_killable(&brightness_mutex); 6759 if (res < 0) 6760 return 0; 6761 6762 res = tpacpi_brightness_get_raw(&status); 6763 6764 mutex_unlock(&brightness_mutex); 6765 6766 if (res < 0) 6767 return 0; 6768 6769 return status & TP_EC_BACKLIGHT_LVLMSK; 6770 } 6771 6772 static void tpacpi_brightness_notify_change(void) 6773 { 6774 backlight_force_update(ibm_backlight_device, 6775 BACKLIGHT_UPDATE_HOTKEY); 6776 } 6777 6778 static const struct backlight_ops ibm_backlight_data = { 6779 .get_brightness = brightness_get, 6780 .update_status = brightness_update_status, 6781 }; 6782 6783 /* --------------------------------------------------------------------- */ 6784 6785 /* 6786 * Call _BCL method of video device. On some ThinkPads this will 6787 * switch the firmware to the ACPI brightness control mode. 6788 */ 6789 6790 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6791 { 6792 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6793 union acpi_object *obj; 6794 struct acpi_device *device, *child; 6795 int rc; 6796 6797 if (acpi_bus_get_device(handle, &device)) 6798 return 0; 6799 6800 rc = 0; 6801 list_for_each_entry(child, &device->children, node) { 6802 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6803 NULL, &buffer); 6804 if (ACPI_FAILURE(status)) 6805 continue; 6806 6807 obj = (union acpi_object *)buffer.pointer; 6808 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6809 pr_err("Unknown _BCL data, please report this to %s\n", 6810 TPACPI_MAIL); 6811 rc = 0; 6812 } else { 6813 rc = obj->package.count; 6814 } 6815 break; 6816 } 6817 6818 kfree(buffer.pointer); 6819 return rc; 6820 } 6821 6822 6823 /* 6824 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6825 */ 6826 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6827 { 6828 acpi_handle video_device; 6829 int bcl_levels = 0; 6830 6831 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6832 if (video_device) 6833 bcl_levels = tpacpi_query_bcl_levels(video_device); 6834 6835 tp_features.bright_acpimode = (bcl_levels > 0); 6836 6837 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6838 } 6839 6840 /* 6841 * These are only useful for models that have only one possibility 6842 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6843 * these quirks. 6844 */ 6845 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6846 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6847 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6848 6849 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6850 /* Models with ATI GPUs known to require ECNVRAM mode */ 6851 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6852 6853 /* Models with ATI GPUs that can use ECNVRAM */ 6854 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6855 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6856 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6857 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6858 6859 /* Models with Intel Extreme Graphics 2 */ 6860 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6861 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6862 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6863 6864 /* Models with Intel GMA900 */ 6865 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6866 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6867 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6868 }; 6869 6870 /* 6871 * Returns < 0 for error, otherwise sets tp_features.bright_* 6872 * and bright_maxlvl. 6873 */ 6874 static void __init tpacpi_detect_brightness_capabilities(void) 6875 { 6876 unsigned int b; 6877 6878 vdbg_printk(TPACPI_DBG_INIT, 6879 "detecting firmware brightness interface capabilities\n"); 6880 6881 /* we could run a quirks check here (same table used by 6882 * brightness_init) if needed */ 6883 6884 /* 6885 * We always attempt to detect acpi support, so as to switch 6886 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6887 * going to publish a backlight interface 6888 */ 6889 b = tpacpi_check_std_acpi_brightness_support(); 6890 switch (b) { 6891 case 16: 6892 bright_maxlvl = 15; 6893 break; 6894 case 8: 6895 case 0: 6896 bright_maxlvl = 7; 6897 break; 6898 default: 6899 tp_features.bright_unkfw = 1; 6900 bright_maxlvl = b - 1; 6901 } 6902 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6903 } 6904 6905 static int __init brightness_init(struct ibm_init_struct *iibm) 6906 { 6907 struct backlight_properties props; 6908 int b; 6909 unsigned long quirks; 6910 6911 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6912 6913 mutex_init(&brightness_mutex); 6914 6915 quirks = tpacpi_check_quirks(brightness_quirk_table, 6916 ARRAY_SIZE(brightness_quirk_table)); 6917 6918 /* tpacpi_detect_brightness_capabilities() must have run already */ 6919 6920 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6921 if (tp_features.bright_unkfw) 6922 return 1; 6923 6924 if (!brightness_enable) { 6925 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6926 "brightness support disabled by module parameter\n"); 6927 return 1; 6928 } 6929 6930 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6931 if (brightness_enable > 1) { 6932 pr_info("Standard ACPI backlight interface available, not loading native one\n"); 6933 return 1; 6934 } else if (brightness_enable == 1) { 6935 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n"); 6936 return 1; 6937 } 6938 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6939 pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n"); 6940 } 6941 6942 /* 6943 * Check for module parameter bogosity, note that we 6944 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6945 * able to detect "unspecified" 6946 */ 6947 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6948 return -EINVAL; 6949 6950 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6951 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6952 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6953 if (quirks & TPACPI_BRGHT_Q_EC) 6954 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6955 else 6956 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6957 6958 dbg_printk(TPACPI_DBG_BRGHT, 6959 "driver auto-selected brightness_mode=%d\n", 6960 brightness_mode); 6961 } 6962 6963 /* Safety */ 6964 if (!tpacpi_is_ibm() && 6965 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6966 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6967 return -EINVAL; 6968 6969 if (tpacpi_brightness_get_raw(&b) < 0) 6970 return 1; 6971 6972 memset(&props, 0, sizeof(struct backlight_properties)); 6973 props.type = BACKLIGHT_PLATFORM; 6974 props.max_brightness = bright_maxlvl; 6975 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6976 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6977 NULL, NULL, 6978 &ibm_backlight_data, 6979 &props); 6980 if (IS_ERR(ibm_backlight_device)) { 6981 int rc = PTR_ERR(ibm_backlight_device); 6982 ibm_backlight_device = NULL; 6983 pr_err("Could not register backlight device\n"); 6984 return rc; 6985 } 6986 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6987 "brightness is supported\n"); 6988 6989 if (quirks & TPACPI_BRGHT_Q_ASK) { 6990 pr_notice("brightness: will use unverified default: brightness_mode=%d\n", 6991 brightness_mode); 6992 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n", 6993 TPACPI_MAIL); 6994 } 6995 6996 /* Added by mistake in early 2007. Probably useless, but it could 6997 * be working around some unknown firmware problem where the value 6998 * read at startup doesn't match the real hardware state... so leave 6999 * it in place just in case */ 7000 backlight_update_status(ibm_backlight_device); 7001 7002 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7003 "brightness: registering brightness hotkeys as change notification\n"); 7004 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7005 | TP_ACPI_HKEY_BRGHTUP_MASK 7006 | TP_ACPI_HKEY_BRGHTDWN_MASK); 7007 return 0; 7008 } 7009 7010 static void brightness_suspend(void) 7011 { 7012 tpacpi_brightness_checkpoint_nvram(); 7013 } 7014 7015 static void brightness_shutdown(void) 7016 { 7017 tpacpi_brightness_checkpoint_nvram(); 7018 } 7019 7020 static void brightness_exit(void) 7021 { 7022 if (ibm_backlight_device) { 7023 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 7024 "calling backlight_device_unregister()\n"); 7025 backlight_device_unregister(ibm_backlight_device); 7026 } 7027 7028 tpacpi_brightness_checkpoint_nvram(); 7029 } 7030 7031 static int brightness_read(struct seq_file *m) 7032 { 7033 int level; 7034 7035 level = brightness_get(NULL); 7036 if (level < 0) { 7037 seq_printf(m, "level:\t\tunreadable\n"); 7038 } else { 7039 seq_printf(m, "level:\t\t%d\n", level); 7040 seq_printf(m, "commands:\tup, down\n"); 7041 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7042 bright_maxlvl); 7043 } 7044 7045 return 0; 7046 } 7047 7048 static int brightness_write(char *buf) 7049 { 7050 int level; 7051 int rc; 7052 char *cmd; 7053 7054 level = brightness_get(NULL); 7055 if (level < 0) 7056 return level; 7057 7058 while ((cmd = next_cmd(&buf))) { 7059 if (strlencmp(cmd, "up") == 0) { 7060 if (level < bright_maxlvl) 7061 level++; 7062 } else if (strlencmp(cmd, "down") == 0) { 7063 if (level > 0) 7064 level--; 7065 } else if (sscanf(cmd, "level %d", &level) == 1 && 7066 level >= 0 && level <= bright_maxlvl) { 7067 /* new level set */ 7068 } else 7069 return -EINVAL; 7070 } 7071 7072 tpacpi_disclose_usertask("procfs brightness", 7073 "set level to %d\n", level); 7074 7075 /* 7076 * Now we know what the final level should be, so we try to set it. 7077 * Doing it this way makes the syscall restartable in case of EINTR 7078 */ 7079 rc = brightness_set(level); 7080 if (!rc && ibm_backlight_device) 7081 backlight_force_update(ibm_backlight_device, 7082 BACKLIGHT_UPDATE_SYSFS); 7083 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7084 } 7085 7086 static struct ibm_struct brightness_driver_data = { 7087 .name = "brightness", 7088 .read = brightness_read, 7089 .write = brightness_write, 7090 .exit = brightness_exit, 7091 .suspend = brightness_suspend, 7092 .shutdown = brightness_shutdown, 7093 }; 7094 7095 /************************************************************************* 7096 * Volume subdriver 7097 */ 7098 7099 /* 7100 * IBM ThinkPads have a simple volume controller with MUTE gating. 7101 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 7102 * 7103 * Since the *61 series (and probably also the later *60 series), Lenovo 7104 * ThinkPads only implement the MUTE gate. 7105 * 7106 * EC register 0x30 7107 * Bit 6: MUTE (1 mutes sound) 7108 * Bit 3-0: Volume 7109 * Other bits should be zero as far as we know. 7110 * 7111 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 7112 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 7113 * such as bit 7 which is used to detect repeated presses of MUTE, 7114 * and we leave them unchanged. 7115 * 7116 * On newer Lenovo ThinkPads, the EC can automatically change the volume 7117 * in response to user input. Unfortunately, this rarely works well. 7118 * The laptop changes the state of its internal MUTE gate and, on some 7119 * models, sends KEY_MUTE, causing any user code that responds to the 7120 * mute button to get confused. The hardware MUTE gate is also 7121 * unnecessary, since user code can handle the mute button without 7122 * kernel or EC help. 7123 * 7124 * To avoid confusing userspace, we simply disable all EC-based mute 7125 * and volume controls when possible. 7126 */ 7127 7128 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 7129 7130 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 7131 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 7132 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7133 7134 #if SNDRV_CARDS <= 32 7135 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7136 #else 7137 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7138 #endif 7139 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7140 static char *alsa_id = "ThinkPadEC"; 7141 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7142 7143 struct tpacpi_alsa_data { 7144 struct snd_card *card; 7145 struct snd_ctl_elem_id *ctl_mute_id; 7146 struct snd_ctl_elem_id *ctl_vol_id; 7147 }; 7148 7149 static struct snd_card *alsa_card; 7150 7151 enum { 7152 TP_EC_AUDIO = 0x30, 7153 7154 /* TP_EC_AUDIO bits */ 7155 TP_EC_AUDIO_MUTESW = 6, 7156 7157 /* TP_EC_AUDIO bitmasks */ 7158 TP_EC_AUDIO_LVL_MSK = 0x0F, 7159 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7160 7161 /* Maximum volume */ 7162 TP_EC_VOLUME_MAX = 14, 7163 }; 7164 7165 enum tpacpi_volume_access_mode { 7166 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7167 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7168 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7169 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7170 TPACPI_VOL_MODE_MAX 7171 }; 7172 7173 enum tpacpi_volume_capabilities { 7174 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7175 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7176 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7177 TPACPI_VOL_CAP_MAX 7178 }; 7179 7180 enum tpacpi_mute_btn_mode { 7181 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7182 /* We don't know what mode 1 is. */ 7183 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7184 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7185 }; 7186 7187 static enum tpacpi_volume_access_mode volume_mode = 7188 TPACPI_VOL_MODE_MAX; 7189 7190 static enum tpacpi_volume_capabilities volume_capabilities; 7191 static bool volume_control_allowed; 7192 static bool software_mute_requested = true; 7193 static bool software_mute_active; 7194 static int software_mute_orig_mode; 7195 7196 /* 7197 * Used to syncronize writers to TP_EC_AUDIO and 7198 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7199 */ 7200 static struct mutex volume_mutex; 7201 7202 static void tpacpi_volume_checkpoint_nvram(void) 7203 { 7204 u8 lec = 0; 7205 u8 b_nvram; 7206 u8 ec_mask; 7207 7208 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7209 return; 7210 if (!volume_control_allowed) 7211 return; 7212 if (software_mute_active) 7213 return; 7214 7215 vdbg_printk(TPACPI_DBG_MIXER, 7216 "trying to checkpoint mixer state to NVRAM...\n"); 7217 7218 if (tp_features.mixer_no_level_control) 7219 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7220 else 7221 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7222 7223 if (mutex_lock_killable(&volume_mutex) < 0) 7224 return; 7225 7226 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7227 goto unlock; 7228 lec &= ec_mask; 7229 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7230 7231 if (lec != (b_nvram & ec_mask)) { 7232 /* NVRAM needs update */ 7233 b_nvram &= ~ec_mask; 7234 b_nvram |= lec; 7235 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7236 dbg_printk(TPACPI_DBG_MIXER, 7237 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7238 (unsigned int) lec, (unsigned int) b_nvram); 7239 } else { 7240 vdbg_printk(TPACPI_DBG_MIXER, 7241 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7242 (unsigned int) lec, (unsigned int) b_nvram); 7243 } 7244 7245 unlock: 7246 mutex_unlock(&volume_mutex); 7247 } 7248 7249 static int volume_get_status_ec(u8 *status) 7250 { 7251 u8 s; 7252 7253 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7254 return -EIO; 7255 7256 *status = s; 7257 7258 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7259 7260 return 0; 7261 } 7262 7263 static int volume_get_status(u8 *status) 7264 { 7265 return volume_get_status_ec(status); 7266 } 7267 7268 static int volume_set_status_ec(const u8 status) 7269 { 7270 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7271 return -EIO; 7272 7273 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7274 7275 /* 7276 * On X200s, and possibly on others, it can take a while for 7277 * reads to become correct. 7278 */ 7279 msleep(1); 7280 7281 return 0; 7282 } 7283 7284 static int volume_set_status(const u8 status) 7285 { 7286 return volume_set_status_ec(status); 7287 } 7288 7289 /* returns < 0 on error, 0 on no change, 1 on change */ 7290 static int __volume_set_mute_ec(const bool mute) 7291 { 7292 int rc; 7293 u8 s, n; 7294 7295 if (mutex_lock_killable(&volume_mutex) < 0) 7296 return -EINTR; 7297 7298 rc = volume_get_status_ec(&s); 7299 if (rc) 7300 goto unlock; 7301 7302 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7303 s & ~TP_EC_AUDIO_MUTESW_MSK; 7304 7305 if (n != s) { 7306 rc = volume_set_status_ec(n); 7307 if (!rc) 7308 rc = 1; 7309 } 7310 7311 unlock: 7312 mutex_unlock(&volume_mutex); 7313 return rc; 7314 } 7315 7316 static int volume_alsa_set_mute(const bool mute) 7317 { 7318 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7319 (mute) ? "" : "un"); 7320 return __volume_set_mute_ec(mute); 7321 } 7322 7323 static int volume_set_mute(const bool mute) 7324 { 7325 int rc; 7326 7327 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7328 (mute) ? "" : "un"); 7329 7330 rc = __volume_set_mute_ec(mute); 7331 return (rc < 0) ? rc : 0; 7332 } 7333 7334 /* returns < 0 on error, 0 on no change, 1 on change */ 7335 static int __volume_set_volume_ec(const u8 vol) 7336 { 7337 int rc; 7338 u8 s, n; 7339 7340 if (vol > TP_EC_VOLUME_MAX) 7341 return -EINVAL; 7342 7343 if (mutex_lock_killable(&volume_mutex) < 0) 7344 return -EINTR; 7345 7346 rc = volume_get_status_ec(&s); 7347 if (rc) 7348 goto unlock; 7349 7350 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7351 7352 if (n != s) { 7353 rc = volume_set_status_ec(n); 7354 if (!rc) 7355 rc = 1; 7356 } 7357 7358 unlock: 7359 mutex_unlock(&volume_mutex); 7360 return rc; 7361 } 7362 7363 static int volume_set_software_mute(bool startup) 7364 { 7365 int result; 7366 7367 if (!tpacpi_is_lenovo()) 7368 return -ENODEV; 7369 7370 if (startup) { 7371 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7372 "HAUM", "qd")) 7373 return -EIO; 7374 7375 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7376 "Initial HAUM setting was %d\n", 7377 software_mute_orig_mode); 7378 } 7379 7380 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7381 (int)TP_EC_MUTE_BTN_NONE)) 7382 return -EIO; 7383 7384 if (result != TP_EC_MUTE_BTN_NONE) 7385 pr_warn("Unexpected SAUM result %d\n", 7386 result); 7387 7388 /* 7389 * In software mute mode, the standard codec controls take 7390 * precendence, so we unmute the ThinkPad HW switch at 7391 * startup. Just on case there are SAUM-capable ThinkPads 7392 * with level controls, set max HW volume as well. 7393 */ 7394 if (tp_features.mixer_no_level_control) 7395 result = volume_set_mute(false); 7396 else 7397 result = volume_set_status(TP_EC_VOLUME_MAX); 7398 7399 if (result != 0) 7400 pr_warn("Failed to unmute the HW mute switch\n"); 7401 7402 return 0; 7403 } 7404 7405 static void volume_exit_software_mute(void) 7406 { 7407 int r; 7408 7409 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7410 || r != software_mute_orig_mode) 7411 pr_warn("Failed to restore mute mode\n"); 7412 } 7413 7414 static int volume_alsa_set_volume(const u8 vol) 7415 { 7416 dbg_printk(TPACPI_DBG_MIXER, 7417 "ALSA: trying to set volume level to %hu\n", vol); 7418 return __volume_set_volume_ec(vol); 7419 } 7420 7421 static void volume_alsa_notify_change(void) 7422 { 7423 struct tpacpi_alsa_data *d; 7424 7425 if (alsa_card && alsa_card->private_data) { 7426 d = alsa_card->private_data; 7427 if (d->ctl_mute_id) 7428 snd_ctl_notify(alsa_card, 7429 SNDRV_CTL_EVENT_MASK_VALUE, 7430 d->ctl_mute_id); 7431 if (d->ctl_vol_id) 7432 snd_ctl_notify(alsa_card, 7433 SNDRV_CTL_EVENT_MASK_VALUE, 7434 d->ctl_vol_id); 7435 } 7436 } 7437 7438 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7439 struct snd_ctl_elem_info *uinfo) 7440 { 7441 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7442 uinfo->count = 1; 7443 uinfo->value.integer.min = 0; 7444 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7445 return 0; 7446 } 7447 7448 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7449 struct snd_ctl_elem_value *ucontrol) 7450 { 7451 u8 s; 7452 int rc; 7453 7454 rc = volume_get_status(&s); 7455 if (rc < 0) 7456 return rc; 7457 7458 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7459 return 0; 7460 } 7461 7462 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7463 struct snd_ctl_elem_value *ucontrol) 7464 { 7465 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7466 ucontrol->value.integer.value[0]); 7467 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7468 } 7469 7470 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7471 7472 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7473 struct snd_ctl_elem_value *ucontrol) 7474 { 7475 u8 s; 7476 int rc; 7477 7478 rc = volume_get_status(&s); 7479 if (rc < 0) 7480 return rc; 7481 7482 ucontrol->value.integer.value[0] = 7483 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7484 return 0; 7485 } 7486 7487 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7488 struct snd_ctl_elem_value *ucontrol) 7489 { 7490 tpacpi_disclose_usertask("ALSA", "%smute\n", 7491 ucontrol->value.integer.value[0] ? 7492 "un" : ""); 7493 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7494 } 7495 7496 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7497 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7498 .name = "Console Playback Volume", 7499 .index = 0, 7500 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7501 .info = volume_alsa_vol_info, 7502 .get = volume_alsa_vol_get, 7503 }; 7504 7505 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7506 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7507 .name = "Console Playback Switch", 7508 .index = 0, 7509 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7510 .info = volume_alsa_mute_info, 7511 .get = volume_alsa_mute_get, 7512 }; 7513 7514 static void volume_suspend(void) 7515 { 7516 tpacpi_volume_checkpoint_nvram(); 7517 } 7518 7519 static void volume_resume(void) 7520 { 7521 if (software_mute_active) { 7522 if (volume_set_software_mute(false) < 0) 7523 pr_warn("Failed to restore software mute\n"); 7524 } else { 7525 volume_alsa_notify_change(); 7526 } 7527 } 7528 7529 static void volume_shutdown(void) 7530 { 7531 tpacpi_volume_checkpoint_nvram(); 7532 } 7533 7534 static void volume_exit(void) 7535 { 7536 if (alsa_card) { 7537 snd_card_free(alsa_card); 7538 alsa_card = NULL; 7539 } 7540 7541 tpacpi_volume_checkpoint_nvram(); 7542 7543 if (software_mute_active) 7544 volume_exit_software_mute(); 7545 } 7546 7547 static int __init volume_create_alsa_mixer(void) 7548 { 7549 struct snd_card *card; 7550 struct tpacpi_alsa_data *data; 7551 struct snd_kcontrol *ctl_vol; 7552 struct snd_kcontrol *ctl_mute; 7553 int rc; 7554 7555 rc = snd_card_new(&tpacpi_pdev->dev, 7556 alsa_index, alsa_id, THIS_MODULE, 7557 sizeof(struct tpacpi_alsa_data), &card); 7558 if (rc < 0 || !card) { 7559 pr_err("Failed to create ALSA card structures: %d\n", rc); 7560 return 1; 7561 } 7562 7563 BUG_ON(!card->private_data); 7564 data = card->private_data; 7565 data->card = card; 7566 7567 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7568 sizeof(card->driver)); 7569 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7570 sizeof(card->shortname)); 7571 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7572 (thinkpad_id.ec_version_str) ? 7573 thinkpad_id.ec_version_str : "(unknown)"); 7574 snprintf(card->longname, sizeof(card->longname), 7575 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7576 (thinkpad_id.ec_version_str) ? 7577 thinkpad_id.ec_version_str : "unknown"); 7578 7579 if (volume_control_allowed) { 7580 volume_alsa_control_vol.put = volume_alsa_vol_put; 7581 volume_alsa_control_vol.access = 7582 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7583 7584 volume_alsa_control_mute.put = volume_alsa_mute_put; 7585 volume_alsa_control_mute.access = 7586 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7587 } 7588 7589 if (!tp_features.mixer_no_level_control) { 7590 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7591 rc = snd_ctl_add(card, ctl_vol); 7592 if (rc < 0) { 7593 pr_err("Failed to create ALSA volume control: %d\n", 7594 rc); 7595 goto err_exit; 7596 } 7597 data->ctl_vol_id = &ctl_vol->id; 7598 } 7599 7600 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7601 rc = snd_ctl_add(card, ctl_mute); 7602 if (rc < 0) { 7603 pr_err("Failed to create ALSA mute control: %d\n", rc); 7604 goto err_exit; 7605 } 7606 data->ctl_mute_id = &ctl_mute->id; 7607 7608 rc = snd_card_register(card); 7609 if (rc < 0) { 7610 pr_err("Failed to register ALSA card: %d\n", rc); 7611 goto err_exit; 7612 } 7613 7614 alsa_card = card; 7615 return 0; 7616 7617 err_exit: 7618 snd_card_free(card); 7619 return 1; 7620 } 7621 7622 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7623 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7624 7625 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7626 /* Whitelist volume level on all IBM by default */ 7627 { .vendor = PCI_VENDOR_ID_IBM, 7628 .bios = TPACPI_MATCH_ANY, 7629 .ec = TPACPI_MATCH_ANY, 7630 .quirks = TPACPI_VOL_Q_LEVEL }, 7631 7632 /* Lenovo models with volume control (needs confirmation) */ 7633 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7634 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7635 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7636 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7637 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7638 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7639 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7640 7641 /* Whitelist mute-only on all Lenovo by default */ 7642 { .vendor = PCI_VENDOR_ID_LENOVO, 7643 .bios = TPACPI_MATCH_ANY, 7644 .ec = TPACPI_MATCH_ANY, 7645 .quirks = TPACPI_VOL_Q_MUTEONLY } 7646 }; 7647 7648 static int __init volume_init(struct ibm_init_struct *iibm) 7649 { 7650 unsigned long quirks; 7651 int rc; 7652 7653 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7654 7655 mutex_init(&volume_mutex); 7656 7657 /* 7658 * Check for module parameter bogosity, note that we 7659 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7660 * able to detect "unspecified" 7661 */ 7662 if (volume_mode > TPACPI_VOL_MODE_MAX) 7663 return -EINVAL; 7664 7665 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7666 pr_err("UCMS step volume mode not implemented, please contact %s\n", 7667 TPACPI_MAIL); 7668 return 1; 7669 } 7670 7671 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7672 return -EINVAL; 7673 7674 /* 7675 * The ALSA mixer is our primary interface. 7676 * When disabled, don't install the subdriver at all 7677 */ 7678 if (!alsa_enable) { 7679 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7680 "ALSA mixer disabled by parameter, not loading volume subdriver...\n"); 7681 return 1; 7682 } 7683 7684 quirks = tpacpi_check_quirks(volume_quirk_table, 7685 ARRAY_SIZE(volume_quirk_table)); 7686 7687 switch (volume_capabilities) { 7688 case TPACPI_VOL_CAP_AUTO: 7689 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7690 tp_features.mixer_no_level_control = 1; 7691 else if (quirks & TPACPI_VOL_Q_LEVEL) 7692 tp_features.mixer_no_level_control = 0; 7693 else 7694 return 1; /* no mixer */ 7695 break; 7696 case TPACPI_VOL_CAP_VOLMUTE: 7697 tp_features.mixer_no_level_control = 0; 7698 break; 7699 case TPACPI_VOL_CAP_MUTEONLY: 7700 tp_features.mixer_no_level_control = 1; 7701 break; 7702 default: 7703 return 1; 7704 } 7705 7706 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7707 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7708 "using user-supplied volume_capabilities=%d\n", 7709 volume_capabilities); 7710 7711 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7712 volume_mode == TPACPI_VOL_MODE_MAX) { 7713 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7714 7715 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7716 "driver auto-selected volume_mode=%d\n", 7717 volume_mode); 7718 } else { 7719 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7720 "using user-supplied volume_mode=%d\n", 7721 volume_mode); 7722 } 7723 7724 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7725 "mute is supported, volume control is %s\n", 7726 str_supported(!tp_features.mixer_no_level_control)); 7727 7728 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7729 software_mute_active = true; 7730 } else { 7731 rc = volume_create_alsa_mixer(); 7732 if (rc) { 7733 pr_err("Could not create the ALSA mixer interface\n"); 7734 return rc; 7735 } 7736 7737 pr_info("Console audio control enabled, mode: %s\n", 7738 (volume_control_allowed) ? 7739 "override (read/write)" : 7740 "monitor (read only)"); 7741 } 7742 7743 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7744 "registering volume hotkeys as change notification\n"); 7745 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7746 | TP_ACPI_HKEY_VOLUP_MASK 7747 | TP_ACPI_HKEY_VOLDWN_MASK 7748 | TP_ACPI_HKEY_MUTE_MASK); 7749 7750 return 0; 7751 } 7752 7753 static int volume_read(struct seq_file *m) 7754 { 7755 u8 status; 7756 7757 if (volume_get_status(&status) < 0) { 7758 seq_printf(m, "level:\t\tunreadable\n"); 7759 } else { 7760 if (tp_features.mixer_no_level_control) 7761 seq_printf(m, "level:\t\tunsupported\n"); 7762 else 7763 seq_printf(m, "level:\t\t%d\n", 7764 status & TP_EC_AUDIO_LVL_MSK); 7765 7766 seq_printf(m, "mute:\t\t%s\n", 7767 onoff(status, TP_EC_AUDIO_MUTESW)); 7768 7769 if (volume_control_allowed) { 7770 seq_printf(m, "commands:\tunmute, mute\n"); 7771 if (!tp_features.mixer_no_level_control) { 7772 seq_printf(m, "commands:\tup, down\n"); 7773 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7774 TP_EC_VOLUME_MAX); 7775 } 7776 } 7777 } 7778 7779 return 0; 7780 } 7781 7782 static int volume_write(char *buf) 7783 { 7784 u8 s; 7785 u8 new_level, new_mute; 7786 int l; 7787 char *cmd; 7788 int rc; 7789 7790 /* 7791 * We do allow volume control at driver startup, so that the 7792 * user can set initial state through the volume=... parameter hack. 7793 */ 7794 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7795 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7796 tp_warned.volume_ctrl_forbidden = 1; 7797 pr_notice("Console audio control in monitor mode, changes are not allowed\n"); 7798 pr_notice("Use the volume_control=1 module parameter to enable volume control\n"); 7799 } 7800 return -EPERM; 7801 } 7802 7803 rc = volume_get_status(&s); 7804 if (rc < 0) 7805 return rc; 7806 7807 new_level = s & TP_EC_AUDIO_LVL_MSK; 7808 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7809 7810 while ((cmd = next_cmd(&buf))) { 7811 if (!tp_features.mixer_no_level_control) { 7812 if (strlencmp(cmd, "up") == 0) { 7813 if (new_mute) 7814 new_mute = 0; 7815 else if (new_level < TP_EC_VOLUME_MAX) 7816 new_level++; 7817 continue; 7818 } else if (strlencmp(cmd, "down") == 0) { 7819 if (new_mute) 7820 new_mute = 0; 7821 else if (new_level > 0) 7822 new_level--; 7823 continue; 7824 } else if (sscanf(cmd, "level %u", &l) == 1 && 7825 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7826 new_level = l; 7827 continue; 7828 } 7829 } 7830 if (strlencmp(cmd, "mute") == 0) 7831 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7832 else if (strlencmp(cmd, "unmute") == 0) 7833 new_mute = 0; 7834 else 7835 return -EINVAL; 7836 } 7837 7838 if (tp_features.mixer_no_level_control) { 7839 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7840 new_mute ? "" : "un"); 7841 rc = volume_set_mute(!!new_mute); 7842 } else { 7843 tpacpi_disclose_usertask("procfs volume", 7844 "%smute and set level to %d\n", 7845 new_mute ? "" : "un", new_level); 7846 rc = volume_set_status(new_mute | new_level); 7847 } 7848 volume_alsa_notify_change(); 7849 7850 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7851 } 7852 7853 static struct ibm_struct volume_driver_data = { 7854 .name = "volume", 7855 .read = volume_read, 7856 .write = volume_write, 7857 .exit = volume_exit, 7858 .suspend = volume_suspend, 7859 .resume = volume_resume, 7860 .shutdown = volume_shutdown, 7861 }; 7862 7863 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7864 7865 #define alsa_card NULL 7866 7867 static inline void volume_alsa_notify_change(void) 7868 { 7869 } 7870 7871 static int __init volume_init(struct ibm_init_struct *iibm) 7872 { 7873 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7874 7875 return 1; 7876 } 7877 7878 static struct ibm_struct volume_driver_data = { 7879 .name = "volume", 7880 }; 7881 7882 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7883 7884 /************************************************************************* 7885 * Fan subdriver 7886 */ 7887 7888 /* 7889 * FAN ACCESS MODES 7890 * 7891 * TPACPI_FAN_RD_ACPI_GFAN: 7892 * ACPI GFAN method: returns fan level 7893 * 7894 * see TPACPI_FAN_WR_ACPI_SFAN 7895 * EC 0x2f (HFSP) not available if GFAN exists 7896 * 7897 * TPACPI_FAN_WR_ACPI_SFAN: 7898 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7899 * 7900 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7901 * it for writing. 7902 * 7903 * TPACPI_FAN_WR_TPEC: 7904 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7905 * Supported on almost all ThinkPads 7906 * 7907 * Fan speed changes of any sort (including those caused by the 7908 * disengaged mode) are usually done slowly by the firmware as the 7909 * maximum amount of fan duty cycle change per second seems to be 7910 * limited. 7911 * 7912 * Reading is not available if GFAN exists. 7913 * Writing is not available if SFAN exists. 7914 * 7915 * Bits 7916 * 7 automatic mode engaged; 7917 * (default operation mode of the ThinkPad) 7918 * fan level is ignored in this mode. 7919 * 6 full speed mode (takes precedence over bit 7); 7920 * not available on all thinkpads. May disable 7921 * the tachometer while the fan controller ramps up 7922 * the speed (which can take up to a few *minutes*). 7923 * Speeds up fan to 100% duty-cycle, which is far above 7924 * the standard RPM levels. It is not impossible that 7925 * it could cause hardware damage. 7926 * 5-3 unused in some models. Extra bits for fan level 7927 * in others, but still useless as all values above 7928 * 7 map to the same speed as level 7 in these models. 7929 * 2-0 fan level (0..7 usually) 7930 * 0x00 = stop 7931 * 0x07 = max (set when temperatures critical) 7932 * Some ThinkPads may have other levels, see 7933 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7934 * 7935 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7936 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7937 * does so, its initial value is meaningless (0x07). 7938 * 7939 * For firmware bugs, refer to: 7940 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7941 * 7942 * ---- 7943 * 7944 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7945 * Main fan tachometer reading (in RPM) 7946 * 7947 * This register is present on all ThinkPads with a new-style EC, and 7948 * it is known not to be present on the A21m/e, and T22, as there is 7949 * something else in offset 0x84 according to the ACPI DSDT. Other 7950 * ThinkPads from this same time period (and earlier) probably lack the 7951 * tachometer as well. 7952 * 7953 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7954 * was never fixed by IBM to report the EC firmware version string 7955 * probably support the tachometer (like the early X models), so 7956 * detecting it is quite hard. We need more data to know for sure. 7957 * 7958 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7959 * might result. 7960 * 7961 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7962 * mode. 7963 * 7964 * For firmware bugs, refer to: 7965 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7966 * 7967 * ---- 7968 * 7969 * ThinkPad EC register 0x31 bit 0 (only on select models) 7970 * 7971 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7972 * show the speed of the main fan. When bit 0 of EC register 0x31 7973 * is one, the tachometer registers show the speed of the auxiliary 7974 * fan. 7975 * 7976 * Fan control seems to affect both fans, regardless of the state 7977 * of this bit. 7978 * 7979 * So far, only the firmware for the X60/X61 non-tablet versions 7980 * seem to support this (firmware TP-7M). 7981 * 7982 * TPACPI_FAN_WR_ACPI_FANS: 7983 * ThinkPad X31, X40, X41. Not available in the X60. 7984 * 7985 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7986 * high speed. ACPI DSDT seems to map these three speeds to levels 7987 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7988 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7989 * 7990 * The speeds are stored on handles 7991 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7992 * 7993 * There are three default speed sets, accessible as handles: 7994 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7995 * 7996 * ACPI DSDT switches which set is in use depending on various 7997 * factors. 7998 * 7999 * TPACPI_FAN_WR_TPEC is also available and should be used to 8000 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 8001 * but the ACPI tables just mention level 7. 8002 */ 8003 8004 enum { /* Fan control constants */ 8005 fan_status_offset = 0x2f, /* EC register 0x2f */ 8006 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 8007 * 0x84 must be read before 0x85 */ 8008 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 8009 bit 0 selects which fan is active */ 8010 8011 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 8012 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 8013 8014 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 8015 }; 8016 8017 enum fan_status_access_mode { 8018 TPACPI_FAN_NONE = 0, /* No fan status or control */ 8019 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 8020 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 8021 }; 8022 8023 enum fan_control_access_mode { 8024 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 8025 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 8026 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 8027 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 8028 }; 8029 8030 enum fan_control_commands { 8031 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 8032 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 8033 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 8034 * and also watchdog cmd */ 8035 }; 8036 8037 static bool fan_control_allowed; 8038 8039 static enum fan_status_access_mode fan_status_access_mode; 8040 static enum fan_control_access_mode fan_control_access_mode; 8041 static enum fan_control_commands fan_control_commands; 8042 8043 static u8 fan_control_initial_status; 8044 static u8 fan_control_desired_level; 8045 static u8 fan_control_resume_level; 8046 static int fan_watchdog_maxinterval; 8047 8048 static struct mutex fan_mutex; 8049 8050 static void fan_watchdog_fire(struct work_struct *ignored); 8051 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 8052 8053 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 8054 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 8055 "\\FSPD", /* 600e/x, 770e, 770x */ 8056 ); /* all others */ 8057 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 8058 "JFNS", /* 770x-JL */ 8059 ); /* all others */ 8060 8061 /* 8062 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 8063 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 8064 * be in auto mode (0x80). 8065 * 8066 * This is corrected by any write to HFSP either by the driver, or 8067 * by the firmware. 8068 * 8069 * We assume 0x07 really means auto mode while this quirk is active, 8070 * as this is far more likely than the ThinkPad being in level 7, 8071 * which is only used by the firmware during thermal emergencies. 8072 * 8073 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 8074 * TP-70 (T43, R52), which are known to be buggy. 8075 */ 8076 8077 static void fan_quirk1_setup(void) 8078 { 8079 if (fan_control_initial_status == 0x07) { 8080 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n"); 8081 tp_features.fan_ctrl_status_undef = 1; 8082 } 8083 } 8084 8085 static void fan_quirk1_handle(u8 *fan_status) 8086 { 8087 if (unlikely(tp_features.fan_ctrl_status_undef)) { 8088 if (*fan_status != fan_control_initial_status) { 8089 /* something changed the HFSP regisnter since 8090 * driver init time, so it is not undefined 8091 * anymore */ 8092 tp_features.fan_ctrl_status_undef = 0; 8093 } else { 8094 /* Return most likely status. In fact, it 8095 * might be the only possible status */ 8096 *fan_status = TP_EC_FAN_AUTO; 8097 } 8098 } 8099 } 8100 8101 /* Select main fan on X60/X61, NOOP on others */ 8102 static bool fan_select_fan1(void) 8103 { 8104 if (tp_features.second_fan) { 8105 u8 val; 8106 8107 if (ec_read(fan_select_offset, &val) < 0) 8108 return false; 8109 val &= 0xFEU; 8110 if (ec_write(fan_select_offset, val) < 0) 8111 return false; 8112 } 8113 return true; 8114 } 8115 8116 /* Select secondary fan on X60/X61 */ 8117 static bool fan_select_fan2(void) 8118 { 8119 u8 val; 8120 8121 if (!tp_features.second_fan) 8122 return false; 8123 8124 if (ec_read(fan_select_offset, &val) < 0) 8125 return false; 8126 val |= 0x01U; 8127 if (ec_write(fan_select_offset, val) < 0) 8128 return false; 8129 8130 return true; 8131 } 8132 8133 /* 8134 * Call with fan_mutex held 8135 */ 8136 static void fan_update_desired_level(u8 status) 8137 { 8138 if ((status & 8139 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8140 if (status > 7) 8141 fan_control_desired_level = 7; 8142 else 8143 fan_control_desired_level = status; 8144 } 8145 } 8146 8147 static int fan_get_status(u8 *status) 8148 { 8149 u8 s; 8150 8151 /* TODO: 8152 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8153 8154 switch (fan_status_access_mode) { 8155 case TPACPI_FAN_RD_ACPI_GFAN: { 8156 /* 570, 600e/x, 770e, 770x */ 8157 int res; 8158 8159 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8160 return -EIO; 8161 8162 if (likely(status)) 8163 *status = res & 0x07; 8164 8165 break; 8166 } 8167 case TPACPI_FAN_RD_TPEC: 8168 /* all except 570, 600e/x, 770e, 770x */ 8169 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8170 return -EIO; 8171 8172 if (likely(status)) { 8173 *status = s; 8174 fan_quirk1_handle(status); 8175 } 8176 8177 break; 8178 8179 default: 8180 return -ENXIO; 8181 } 8182 8183 return 0; 8184 } 8185 8186 static int fan_get_status_safe(u8 *status) 8187 { 8188 int rc; 8189 u8 s; 8190 8191 if (mutex_lock_killable(&fan_mutex)) 8192 return -ERESTARTSYS; 8193 rc = fan_get_status(&s); 8194 if (!rc) 8195 fan_update_desired_level(s); 8196 mutex_unlock(&fan_mutex); 8197 8198 if (rc) 8199 return rc; 8200 if (status) 8201 *status = s; 8202 8203 return 0; 8204 } 8205 8206 static int fan_get_speed(unsigned int *speed) 8207 { 8208 u8 hi, lo; 8209 8210 switch (fan_status_access_mode) { 8211 case TPACPI_FAN_RD_TPEC: 8212 /* all except 570, 600e/x, 770e, 770x */ 8213 if (unlikely(!fan_select_fan1())) 8214 return -EIO; 8215 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8216 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8217 return -EIO; 8218 8219 if (likely(speed)) 8220 *speed = (hi << 8) | lo; 8221 8222 break; 8223 8224 default: 8225 return -ENXIO; 8226 } 8227 8228 return 0; 8229 } 8230 8231 static int fan2_get_speed(unsigned int *speed) 8232 { 8233 u8 hi, lo; 8234 bool rc; 8235 8236 switch (fan_status_access_mode) { 8237 case TPACPI_FAN_RD_TPEC: 8238 /* all except 570, 600e/x, 770e, 770x */ 8239 if (unlikely(!fan_select_fan2())) 8240 return -EIO; 8241 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8242 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8243 fan_select_fan1(); /* play it safe */ 8244 if (rc) 8245 return -EIO; 8246 8247 if (likely(speed)) 8248 *speed = (hi << 8) | lo; 8249 8250 break; 8251 8252 default: 8253 return -ENXIO; 8254 } 8255 8256 return 0; 8257 } 8258 8259 static int fan_set_level(int level) 8260 { 8261 if (!fan_control_allowed) 8262 return -EPERM; 8263 8264 switch (fan_control_access_mode) { 8265 case TPACPI_FAN_WR_ACPI_SFAN: 8266 if (level >= 0 && level <= 7) { 8267 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8268 return -EIO; 8269 } else 8270 return -EINVAL; 8271 break; 8272 8273 case TPACPI_FAN_WR_ACPI_FANS: 8274 case TPACPI_FAN_WR_TPEC: 8275 if (!(level & TP_EC_FAN_AUTO) && 8276 !(level & TP_EC_FAN_FULLSPEED) && 8277 ((level < 0) || (level > 7))) 8278 return -EINVAL; 8279 8280 /* safety net should the EC not support AUTO 8281 * or FULLSPEED mode bits and just ignore them */ 8282 if (level & TP_EC_FAN_FULLSPEED) 8283 level |= 7; /* safety min speed 7 */ 8284 else if (level & TP_EC_FAN_AUTO) 8285 level |= 4; /* safety min speed 4 */ 8286 8287 if (!acpi_ec_write(fan_status_offset, level)) 8288 return -EIO; 8289 else 8290 tp_features.fan_ctrl_status_undef = 0; 8291 break; 8292 8293 default: 8294 return -ENXIO; 8295 } 8296 8297 vdbg_printk(TPACPI_DBG_FAN, 8298 "fan control: set fan control register to 0x%02x\n", level); 8299 return 0; 8300 } 8301 8302 static int fan_set_level_safe(int level) 8303 { 8304 int rc; 8305 8306 if (!fan_control_allowed) 8307 return -EPERM; 8308 8309 if (mutex_lock_killable(&fan_mutex)) 8310 return -ERESTARTSYS; 8311 8312 if (level == TPACPI_FAN_LAST_LEVEL) 8313 level = fan_control_desired_level; 8314 8315 rc = fan_set_level(level); 8316 if (!rc) 8317 fan_update_desired_level(level); 8318 8319 mutex_unlock(&fan_mutex); 8320 return rc; 8321 } 8322 8323 static int fan_set_enable(void) 8324 { 8325 u8 s; 8326 int rc; 8327 8328 if (!fan_control_allowed) 8329 return -EPERM; 8330 8331 if (mutex_lock_killable(&fan_mutex)) 8332 return -ERESTARTSYS; 8333 8334 switch (fan_control_access_mode) { 8335 case TPACPI_FAN_WR_ACPI_FANS: 8336 case TPACPI_FAN_WR_TPEC: 8337 rc = fan_get_status(&s); 8338 if (rc < 0) 8339 break; 8340 8341 /* Don't go out of emergency fan mode */ 8342 if (s != 7) { 8343 s &= 0x07; 8344 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8345 } 8346 8347 if (!acpi_ec_write(fan_status_offset, s)) 8348 rc = -EIO; 8349 else { 8350 tp_features.fan_ctrl_status_undef = 0; 8351 rc = 0; 8352 } 8353 break; 8354 8355 case TPACPI_FAN_WR_ACPI_SFAN: 8356 rc = fan_get_status(&s); 8357 if (rc < 0) 8358 break; 8359 8360 s &= 0x07; 8361 8362 /* Set fan to at least level 4 */ 8363 s |= 4; 8364 8365 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8366 rc = -EIO; 8367 else 8368 rc = 0; 8369 break; 8370 8371 default: 8372 rc = -ENXIO; 8373 } 8374 8375 mutex_unlock(&fan_mutex); 8376 8377 if (!rc) 8378 vdbg_printk(TPACPI_DBG_FAN, 8379 "fan control: set fan control register to 0x%02x\n", 8380 s); 8381 return rc; 8382 } 8383 8384 static int fan_set_disable(void) 8385 { 8386 int rc; 8387 8388 if (!fan_control_allowed) 8389 return -EPERM; 8390 8391 if (mutex_lock_killable(&fan_mutex)) 8392 return -ERESTARTSYS; 8393 8394 rc = 0; 8395 switch (fan_control_access_mode) { 8396 case TPACPI_FAN_WR_ACPI_FANS: 8397 case TPACPI_FAN_WR_TPEC: 8398 if (!acpi_ec_write(fan_status_offset, 0x00)) 8399 rc = -EIO; 8400 else { 8401 fan_control_desired_level = 0; 8402 tp_features.fan_ctrl_status_undef = 0; 8403 } 8404 break; 8405 8406 case TPACPI_FAN_WR_ACPI_SFAN: 8407 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8408 rc = -EIO; 8409 else 8410 fan_control_desired_level = 0; 8411 break; 8412 8413 default: 8414 rc = -ENXIO; 8415 } 8416 8417 if (!rc) 8418 vdbg_printk(TPACPI_DBG_FAN, 8419 "fan control: set fan control register to 0\n"); 8420 8421 mutex_unlock(&fan_mutex); 8422 return rc; 8423 } 8424 8425 static int fan_set_speed(int speed) 8426 { 8427 int rc; 8428 8429 if (!fan_control_allowed) 8430 return -EPERM; 8431 8432 if (mutex_lock_killable(&fan_mutex)) 8433 return -ERESTARTSYS; 8434 8435 rc = 0; 8436 switch (fan_control_access_mode) { 8437 case TPACPI_FAN_WR_ACPI_FANS: 8438 if (speed >= 0 && speed <= 65535) { 8439 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8440 speed, speed, speed)) 8441 rc = -EIO; 8442 } else 8443 rc = -EINVAL; 8444 break; 8445 8446 default: 8447 rc = -ENXIO; 8448 } 8449 8450 mutex_unlock(&fan_mutex); 8451 return rc; 8452 } 8453 8454 static void fan_watchdog_reset(void) 8455 { 8456 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8457 return; 8458 8459 if (fan_watchdog_maxinterval > 0 && 8460 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8461 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8462 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8463 else 8464 cancel_delayed_work(&fan_watchdog_task); 8465 } 8466 8467 static void fan_watchdog_fire(struct work_struct *ignored) 8468 { 8469 int rc; 8470 8471 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8472 return; 8473 8474 pr_notice("fan watchdog: enabling fan\n"); 8475 rc = fan_set_enable(); 8476 if (rc < 0) { 8477 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n", 8478 rc); 8479 /* reschedule for later */ 8480 fan_watchdog_reset(); 8481 } 8482 } 8483 8484 /* 8485 * SYSFS fan layout: hwmon compatible (device) 8486 * 8487 * pwm*_enable: 8488 * 0: "disengaged" mode 8489 * 1: manual mode 8490 * 2: native EC "auto" mode (recommended, hardware default) 8491 * 8492 * pwm*: set speed in manual mode, ignored otherwise. 8493 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8494 * interpolation. 8495 * 8496 * fan*_input: tachometer reading, RPM 8497 * 8498 * 8499 * SYSFS fan layout: extensions 8500 * 8501 * fan_watchdog (driver): 8502 * fan watchdog interval in seconds, 0 disables (default), max 120 8503 */ 8504 8505 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8506 static ssize_t fan_pwm1_enable_show(struct device *dev, 8507 struct device_attribute *attr, 8508 char *buf) 8509 { 8510 int res, mode; 8511 u8 status; 8512 8513 res = fan_get_status_safe(&status); 8514 if (res) 8515 return res; 8516 8517 if (status & TP_EC_FAN_FULLSPEED) { 8518 mode = 0; 8519 } else if (status & TP_EC_FAN_AUTO) { 8520 mode = 2; 8521 } else 8522 mode = 1; 8523 8524 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8525 } 8526 8527 static ssize_t fan_pwm1_enable_store(struct device *dev, 8528 struct device_attribute *attr, 8529 const char *buf, size_t count) 8530 { 8531 unsigned long t; 8532 int res, level; 8533 8534 if (parse_strtoul(buf, 2, &t)) 8535 return -EINVAL; 8536 8537 tpacpi_disclose_usertask("hwmon pwm1_enable", 8538 "set fan mode to %lu\n", t); 8539 8540 switch (t) { 8541 case 0: 8542 level = TP_EC_FAN_FULLSPEED; 8543 break; 8544 case 1: 8545 level = TPACPI_FAN_LAST_LEVEL; 8546 break; 8547 case 2: 8548 level = TP_EC_FAN_AUTO; 8549 break; 8550 case 3: 8551 /* reserved for software-controlled auto mode */ 8552 return -ENOSYS; 8553 default: 8554 return -EINVAL; 8555 } 8556 8557 res = fan_set_level_safe(level); 8558 if (res == -ENXIO) 8559 return -EINVAL; 8560 else if (res < 0) 8561 return res; 8562 8563 fan_watchdog_reset(); 8564 8565 return count; 8566 } 8567 8568 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8569 fan_pwm1_enable_show, fan_pwm1_enable_store); 8570 8571 /* sysfs fan pwm1 ------------------------------------------------------ */ 8572 static ssize_t fan_pwm1_show(struct device *dev, 8573 struct device_attribute *attr, 8574 char *buf) 8575 { 8576 int res; 8577 u8 status; 8578 8579 res = fan_get_status_safe(&status); 8580 if (res) 8581 return res; 8582 8583 if ((status & 8584 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8585 status = fan_control_desired_level; 8586 8587 if (status > 7) 8588 status = 7; 8589 8590 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8591 } 8592 8593 static ssize_t fan_pwm1_store(struct device *dev, 8594 struct device_attribute *attr, 8595 const char *buf, size_t count) 8596 { 8597 unsigned long s; 8598 int rc; 8599 u8 status, newlevel; 8600 8601 if (parse_strtoul(buf, 255, &s)) 8602 return -EINVAL; 8603 8604 tpacpi_disclose_usertask("hwmon pwm1", 8605 "set fan speed to %lu\n", s); 8606 8607 /* scale down from 0-255 to 0-7 */ 8608 newlevel = (s >> 5) & 0x07; 8609 8610 if (mutex_lock_killable(&fan_mutex)) 8611 return -ERESTARTSYS; 8612 8613 rc = fan_get_status(&status); 8614 if (!rc && (status & 8615 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8616 rc = fan_set_level(newlevel); 8617 if (rc == -ENXIO) 8618 rc = -EINVAL; 8619 else if (!rc) { 8620 fan_update_desired_level(newlevel); 8621 fan_watchdog_reset(); 8622 } 8623 } 8624 8625 mutex_unlock(&fan_mutex); 8626 return (rc) ? rc : count; 8627 } 8628 8629 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8630 8631 /* sysfs fan fan1_input ------------------------------------------------ */ 8632 static ssize_t fan_fan1_input_show(struct device *dev, 8633 struct device_attribute *attr, 8634 char *buf) 8635 { 8636 int res; 8637 unsigned int speed; 8638 8639 res = fan_get_speed(&speed); 8640 if (res < 0) 8641 return res; 8642 8643 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8644 } 8645 8646 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8647 8648 /* sysfs fan fan2_input ------------------------------------------------ */ 8649 static ssize_t fan_fan2_input_show(struct device *dev, 8650 struct device_attribute *attr, 8651 char *buf) 8652 { 8653 int res; 8654 unsigned int speed; 8655 8656 res = fan2_get_speed(&speed); 8657 if (res < 0) 8658 return res; 8659 8660 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8661 } 8662 8663 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8664 8665 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8666 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf) 8667 { 8668 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8669 } 8670 8671 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf, 8672 size_t count) 8673 { 8674 unsigned long t; 8675 8676 if (parse_strtoul(buf, 120, &t)) 8677 return -EINVAL; 8678 8679 if (!fan_control_allowed) 8680 return -EPERM; 8681 8682 fan_watchdog_maxinterval = t; 8683 fan_watchdog_reset(); 8684 8685 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8686 8687 return count; 8688 } 8689 static DRIVER_ATTR_RW(fan_watchdog); 8690 8691 /* --------------------------------------------------------------------- */ 8692 static struct attribute *fan_attributes[] = { 8693 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8694 &dev_attr_fan1_input.attr, 8695 NULL, /* for fan2_input */ 8696 NULL 8697 }; 8698 8699 static const struct attribute_group fan_attr_group = { 8700 .attrs = fan_attributes, 8701 }; 8702 8703 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8704 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8705 8706 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 8707 { .vendor = PCI_VENDOR_ID_IBM, \ 8708 .bios = TPACPI_MATCH_ANY, \ 8709 .ec = TPID(__id1, __id2), \ 8710 .quirks = __quirks } 8711 8712 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 8713 { .vendor = PCI_VENDOR_ID_LENOVO, \ 8714 .bios = TPACPI_MATCH_ANY, \ 8715 .ec = TPID(__id1, __id2), \ 8716 .quirks = __quirks } 8717 8718 #define TPACPI_FAN_QB(__id1, __id2, __quirks) \ 8719 { .vendor = PCI_VENDOR_ID_LENOVO, \ 8720 .bios = TPID(__id1, __id2), \ 8721 .ec = TPACPI_MATCH_ANY, \ 8722 .quirks = __quirks } 8723 8724 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8725 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 8726 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 8727 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 8728 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 8729 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 8730 TPACPI_FAN_QB('N', '1', TPACPI_FAN_2FAN), 8731 }; 8732 8733 #undef TPACPI_FAN_QL 8734 #undef TPACPI_FAN_QI 8735 #undef TPACPI_FAN_QB 8736 8737 static int __init fan_init(struct ibm_init_struct *iibm) 8738 { 8739 int rc; 8740 unsigned long quirks; 8741 8742 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8743 "initializing fan subdriver\n"); 8744 8745 mutex_init(&fan_mutex); 8746 fan_status_access_mode = TPACPI_FAN_NONE; 8747 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8748 fan_control_commands = 0; 8749 fan_watchdog_maxinterval = 0; 8750 tp_features.fan_ctrl_status_undef = 0; 8751 tp_features.second_fan = 0; 8752 fan_control_desired_level = 7; 8753 8754 if (tpacpi_is_ibm()) { 8755 TPACPI_ACPIHANDLE_INIT(fans); 8756 TPACPI_ACPIHANDLE_INIT(gfan); 8757 TPACPI_ACPIHANDLE_INIT(sfan); 8758 } 8759 8760 quirks = tpacpi_check_quirks(fan_quirk_table, 8761 ARRAY_SIZE(fan_quirk_table)); 8762 8763 if (gfan_handle) { 8764 /* 570, 600e/x, 770e, 770x */ 8765 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8766 } else { 8767 /* all other ThinkPads: note that even old-style 8768 * ThinkPad ECs supports the fan control register */ 8769 if (likely(acpi_ec_read(fan_status_offset, 8770 &fan_control_initial_status))) { 8771 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8772 if (quirks & TPACPI_FAN_Q1) 8773 fan_quirk1_setup(); 8774 if (quirks & TPACPI_FAN_2FAN) { 8775 tp_features.second_fan = 1; 8776 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8777 "secondary fan support enabled\n"); 8778 } 8779 } else { 8780 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n"); 8781 return 1; 8782 } 8783 } 8784 8785 if (sfan_handle) { 8786 /* 570, 770x-JL */ 8787 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8788 fan_control_commands |= 8789 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8790 } else { 8791 if (!gfan_handle) { 8792 /* gfan without sfan means no fan control */ 8793 /* all other models implement TP EC 0x2f control */ 8794 8795 if (fans_handle) { 8796 /* X31, X40, X41 */ 8797 fan_control_access_mode = 8798 TPACPI_FAN_WR_ACPI_FANS; 8799 fan_control_commands |= 8800 TPACPI_FAN_CMD_SPEED | 8801 TPACPI_FAN_CMD_LEVEL | 8802 TPACPI_FAN_CMD_ENABLE; 8803 } else { 8804 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8805 fan_control_commands |= 8806 TPACPI_FAN_CMD_LEVEL | 8807 TPACPI_FAN_CMD_ENABLE; 8808 } 8809 } 8810 } 8811 8812 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8813 "fan is %s, modes %d, %d\n", 8814 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8815 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8816 fan_status_access_mode, fan_control_access_mode); 8817 8818 /* fan control master switch */ 8819 if (!fan_control_allowed) { 8820 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8821 fan_control_commands = 0; 8822 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8823 "fan control features disabled by parameter\n"); 8824 } 8825 8826 /* update fan_control_desired_level */ 8827 if (fan_status_access_mode != TPACPI_FAN_NONE) 8828 fan_get_status_safe(NULL); 8829 8830 if (fan_status_access_mode != TPACPI_FAN_NONE || 8831 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8832 if (tp_features.second_fan) { 8833 /* attach second fan tachometer */ 8834 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8835 &dev_attr_fan2_input.attr; 8836 } 8837 rc = sysfs_create_group(&tpacpi_hwmon->kobj, 8838 &fan_attr_group); 8839 if (rc < 0) 8840 return rc; 8841 8842 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8843 &driver_attr_fan_watchdog); 8844 if (rc < 0) { 8845 sysfs_remove_group(&tpacpi_hwmon->kobj, 8846 &fan_attr_group); 8847 return rc; 8848 } 8849 return 0; 8850 } else 8851 return 1; 8852 } 8853 8854 static void fan_exit(void) 8855 { 8856 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8857 "cancelling any pending fan watchdog tasks\n"); 8858 8859 /* FIXME: can we really do this unconditionally? */ 8860 sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group); 8861 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8862 &driver_attr_fan_watchdog); 8863 8864 cancel_delayed_work(&fan_watchdog_task); 8865 flush_workqueue(tpacpi_wq); 8866 } 8867 8868 static void fan_suspend(void) 8869 { 8870 int rc; 8871 8872 if (!fan_control_allowed) 8873 return; 8874 8875 /* Store fan status in cache */ 8876 fan_control_resume_level = 0; 8877 rc = fan_get_status_safe(&fan_control_resume_level); 8878 if (rc < 0) 8879 pr_notice("failed to read fan level for later restore during resume: %d\n", 8880 rc); 8881 8882 /* if it is undefined, don't attempt to restore it. 8883 * KEEP THIS LAST */ 8884 if (tp_features.fan_ctrl_status_undef) 8885 fan_control_resume_level = 0; 8886 } 8887 8888 static void fan_resume(void) 8889 { 8890 u8 current_level = 7; 8891 bool do_set = false; 8892 int rc; 8893 8894 /* DSDT *always* updates status on resume */ 8895 tp_features.fan_ctrl_status_undef = 0; 8896 8897 if (!fan_control_allowed || 8898 !fan_control_resume_level || 8899 (fan_get_status_safe(¤t_level) < 0)) 8900 return; 8901 8902 switch (fan_control_access_mode) { 8903 case TPACPI_FAN_WR_ACPI_SFAN: 8904 /* never decrease fan level */ 8905 do_set = (fan_control_resume_level > current_level); 8906 break; 8907 case TPACPI_FAN_WR_ACPI_FANS: 8908 case TPACPI_FAN_WR_TPEC: 8909 /* never decrease fan level, scale is: 8910 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8911 * 8912 * We expect the firmware to set either 7 or AUTO, but we 8913 * handle FULLSPEED out of paranoia. 8914 * 8915 * So, we can safely only restore FULLSPEED or 7, anything 8916 * else could slow the fan. Restoring AUTO is useless, at 8917 * best that's exactly what the DSDT already set (it is the 8918 * slower it uses). 8919 * 8920 * Always keep in mind that the DSDT *will* have set the 8921 * fans to what the vendor supposes is the best level. We 8922 * muck with it only to speed the fan up. 8923 */ 8924 if (fan_control_resume_level != 7 && 8925 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8926 return; 8927 else 8928 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8929 (current_level != fan_control_resume_level); 8930 break; 8931 default: 8932 return; 8933 } 8934 if (do_set) { 8935 pr_notice("restoring fan level to 0x%02x\n", 8936 fan_control_resume_level); 8937 rc = fan_set_level_safe(fan_control_resume_level); 8938 if (rc < 0) 8939 pr_notice("failed to restore fan level: %d\n", rc); 8940 } 8941 } 8942 8943 static int fan_read(struct seq_file *m) 8944 { 8945 int rc; 8946 u8 status; 8947 unsigned int speed = 0; 8948 8949 switch (fan_status_access_mode) { 8950 case TPACPI_FAN_RD_ACPI_GFAN: 8951 /* 570, 600e/x, 770e, 770x */ 8952 rc = fan_get_status_safe(&status); 8953 if (rc < 0) 8954 return rc; 8955 8956 seq_printf(m, "status:\t\t%s\n" 8957 "level:\t\t%d\n", 8958 (status != 0) ? "enabled" : "disabled", status); 8959 break; 8960 8961 case TPACPI_FAN_RD_TPEC: 8962 /* all except 570, 600e/x, 770e, 770x */ 8963 rc = fan_get_status_safe(&status); 8964 if (rc < 0) 8965 return rc; 8966 8967 seq_printf(m, "status:\t\t%s\n", 8968 (status != 0) ? "enabled" : "disabled"); 8969 8970 rc = fan_get_speed(&speed); 8971 if (rc < 0) 8972 return rc; 8973 8974 seq_printf(m, "speed:\t\t%d\n", speed); 8975 8976 if (status & TP_EC_FAN_FULLSPEED) 8977 /* Disengaged mode takes precedence */ 8978 seq_printf(m, "level:\t\tdisengaged\n"); 8979 else if (status & TP_EC_FAN_AUTO) 8980 seq_printf(m, "level:\t\tauto\n"); 8981 else 8982 seq_printf(m, "level:\t\t%d\n", status); 8983 break; 8984 8985 case TPACPI_FAN_NONE: 8986 default: 8987 seq_printf(m, "status:\t\tnot supported\n"); 8988 } 8989 8990 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8991 seq_printf(m, "commands:\tlevel <level>"); 8992 8993 switch (fan_control_access_mode) { 8994 case TPACPI_FAN_WR_ACPI_SFAN: 8995 seq_printf(m, " (<level> is 0-7)\n"); 8996 break; 8997 8998 default: 8999 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n"); 9000 break; 9001 } 9002 } 9003 9004 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 9005 seq_printf(m, "commands:\tenable, disable\n" 9006 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n"); 9007 9008 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 9009 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n"); 9010 9011 return 0; 9012 } 9013 9014 static int fan_write_cmd_level(const char *cmd, int *rc) 9015 { 9016 int level; 9017 9018 if (strlencmp(cmd, "level auto") == 0) 9019 level = TP_EC_FAN_AUTO; 9020 else if ((strlencmp(cmd, "level disengaged") == 0) | 9021 (strlencmp(cmd, "level full-speed") == 0)) 9022 level = TP_EC_FAN_FULLSPEED; 9023 else if (sscanf(cmd, "level %d", &level) != 1) 9024 return 0; 9025 9026 *rc = fan_set_level_safe(level); 9027 if (*rc == -ENXIO) 9028 pr_err("level command accepted for unsupported access mode %d\n", 9029 fan_control_access_mode); 9030 else if (!*rc) 9031 tpacpi_disclose_usertask("procfs fan", 9032 "set level to %d\n", level); 9033 9034 return 1; 9035 } 9036 9037 static int fan_write_cmd_enable(const char *cmd, int *rc) 9038 { 9039 if (strlencmp(cmd, "enable") != 0) 9040 return 0; 9041 9042 *rc = fan_set_enable(); 9043 if (*rc == -ENXIO) 9044 pr_err("enable command accepted for unsupported access mode %d\n", 9045 fan_control_access_mode); 9046 else if (!*rc) 9047 tpacpi_disclose_usertask("procfs fan", "enable\n"); 9048 9049 return 1; 9050 } 9051 9052 static int fan_write_cmd_disable(const char *cmd, int *rc) 9053 { 9054 if (strlencmp(cmd, "disable") != 0) 9055 return 0; 9056 9057 *rc = fan_set_disable(); 9058 if (*rc == -ENXIO) 9059 pr_err("disable command accepted for unsupported access mode %d\n", 9060 fan_control_access_mode); 9061 else if (!*rc) 9062 tpacpi_disclose_usertask("procfs fan", "disable\n"); 9063 9064 return 1; 9065 } 9066 9067 static int fan_write_cmd_speed(const char *cmd, int *rc) 9068 { 9069 int speed; 9070 9071 /* TODO: 9072 * Support speed <low> <medium> <high> ? */ 9073 9074 if (sscanf(cmd, "speed %d", &speed) != 1) 9075 return 0; 9076 9077 *rc = fan_set_speed(speed); 9078 if (*rc == -ENXIO) 9079 pr_err("speed command accepted for unsupported access mode %d\n", 9080 fan_control_access_mode); 9081 else if (!*rc) 9082 tpacpi_disclose_usertask("procfs fan", 9083 "set speed to %d\n", speed); 9084 9085 return 1; 9086 } 9087 9088 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 9089 { 9090 int interval; 9091 9092 if (sscanf(cmd, "watchdog %d", &interval) != 1) 9093 return 0; 9094 9095 if (interval < 0 || interval > 120) 9096 *rc = -EINVAL; 9097 else { 9098 fan_watchdog_maxinterval = interval; 9099 tpacpi_disclose_usertask("procfs fan", 9100 "set watchdog timer to %d\n", 9101 interval); 9102 } 9103 9104 return 1; 9105 } 9106 9107 static int fan_write(char *buf) 9108 { 9109 char *cmd; 9110 int rc = 0; 9111 9112 while (!rc && (cmd = next_cmd(&buf))) { 9113 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 9114 fan_write_cmd_level(cmd, &rc)) && 9115 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 9116 (fan_write_cmd_enable(cmd, &rc) || 9117 fan_write_cmd_disable(cmd, &rc) || 9118 fan_write_cmd_watchdog(cmd, &rc))) && 9119 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 9120 fan_write_cmd_speed(cmd, &rc)) 9121 ) 9122 rc = -EINVAL; 9123 else if (!rc) 9124 fan_watchdog_reset(); 9125 } 9126 9127 return rc; 9128 } 9129 9130 static struct ibm_struct fan_driver_data = { 9131 .name = "fan", 9132 .read = fan_read, 9133 .write = fan_write, 9134 .exit = fan_exit, 9135 .suspend = fan_suspend, 9136 .resume = fan_resume, 9137 }; 9138 9139 /************************************************************************* 9140 * Mute LED subdriver 9141 */ 9142 9143 9144 struct tp_led_table { 9145 acpi_string name; 9146 int on_value; 9147 int off_value; 9148 int state; 9149 }; 9150 9151 static struct tp_led_table led_tables[] = { 9152 [TPACPI_LED_MUTE] = { 9153 .name = "SSMS", 9154 .on_value = 1, 9155 .off_value = 0, 9156 }, 9157 [TPACPI_LED_MICMUTE] = { 9158 .name = "MMTS", 9159 .on_value = 2, 9160 .off_value = 0, 9161 }, 9162 }; 9163 9164 static int mute_led_on_off(struct tp_led_table *t, bool state) 9165 { 9166 acpi_handle temp; 9167 int output; 9168 9169 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9170 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9171 return -EIO; 9172 } 9173 9174 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9175 state ? t->on_value : t->off_value)) 9176 return -EIO; 9177 9178 t->state = state; 9179 return state; 9180 } 9181 9182 int tpacpi_led_set(int whichled, bool on) 9183 { 9184 struct tp_led_table *t; 9185 9186 if (whichled < 0 || whichled >= TPACPI_LED_MAX) 9187 return -EINVAL; 9188 9189 t = &led_tables[whichled]; 9190 if (t->state < 0 || t->state == on) 9191 return t->state; 9192 return mute_led_on_off(t, on); 9193 } 9194 EXPORT_SYMBOL_GPL(tpacpi_led_set); 9195 9196 static int mute_led_init(struct ibm_init_struct *iibm) 9197 { 9198 acpi_handle temp; 9199 int i; 9200 9201 for (i = 0; i < TPACPI_LED_MAX; i++) { 9202 struct tp_led_table *t = &led_tables[i]; 9203 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) 9204 mute_led_on_off(t, false); 9205 else 9206 t->state = -ENODEV; 9207 } 9208 return 0; 9209 } 9210 9211 static void mute_led_exit(void) 9212 { 9213 int i; 9214 9215 for (i = 0; i < TPACPI_LED_MAX; i++) 9216 tpacpi_led_set(i, false); 9217 } 9218 9219 static void mute_led_resume(void) 9220 { 9221 int i; 9222 9223 for (i = 0; i < TPACPI_LED_MAX; i++) { 9224 struct tp_led_table *t = &led_tables[i]; 9225 if (t->state >= 0) 9226 mute_led_on_off(t, t->state); 9227 } 9228 } 9229 9230 static struct ibm_struct mute_led_driver_data = { 9231 .name = "mute_led", 9232 .exit = mute_led_exit, 9233 .resume = mute_led_resume, 9234 }; 9235 9236 /* 9237 * Battery Wear Control Driver 9238 * Contact: Ognjen Galic <smclt30p@gmail.com> 9239 */ 9240 9241 /* Metadata */ 9242 9243 #define GET_START "BCTG" 9244 #define SET_START "BCCS" 9245 #define GET_STOP "BCSG" 9246 #define SET_STOP "BCSS" 9247 9248 #define START_ATTR "charge_start_threshold" 9249 #define STOP_ATTR "charge_stop_threshold" 9250 9251 enum { 9252 BAT_ANY = 0, 9253 BAT_PRIMARY = 1, 9254 BAT_SECONDARY = 2 9255 }; 9256 9257 enum { 9258 /* Error condition bit */ 9259 METHOD_ERR = BIT(31), 9260 }; 9261 9262 enum { 9263 /* This is used in the get/set helpers */ 9264 THRESHOLD_START, 9265 THRESHOLD_STOP, 9266 }; 9267 9268 struct tpacpi_battery_data { 9269 int charge_start; 9270 int start_support; 9271 int charge_stop; 9272 int stop_support; 9273 }; 9274 9275 struct tpacpi_battery_driver_data { 9276 struct tpacpi_battery_data batteries[3]; 9277 int individual_addressing; 9278 }; 9279 9280 static struct tpacpi_battery_driver_data battery_info; 9281 9282 /* ACPI helpers/functions/probes */ 9283 9284 /** 9285 * This evaluates a ACPI method call specific to the battery 9286 * ACPI extension. The specifics are that an error is marked 9287 * in the 32rd bit of the response, so we just check that here. 9288 */ 9289 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param) 9290 { 9291 int response; 9292 9293 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) { 9294 acpi_handle_err(hkey_handle, "%s: evaluate failed", method); 9295 return AE_ERROR; 9296 } 9297 if (response & METHOD_ERR) { 9298 acpi_handle_err(hkey_handle, 9299 "%s evaluated but flagged as error", method); 9300 return AE_ERROR; 9301 } 9302 *ret = response; 9303 return AE_OK; 9304 } 9305 9306 static int tpacpi_battery_get(int what, int battery, int *ret) 9307 { 9308 switch (what) { 9309 case THRESHOLD_START: 9310 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery)) 9311 return -ENODEV; 9312 9313 /* The value is in the low 8 bits of the response */ 9314 *ret = *ret & 0xFF; 9315 return 0; 9316 case THRESHOLD_STOP: 9317 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery)) 9318 return -ENODEV; 9319 /* Value is in lower 8 bits */ 9320 *ret = *ret & 0xFF; 9321 /* 9322 * On the stop value, if we return 0 that 9323 * does not make any sense. 0 means Default, which 9324 * means that charging stops at 100%, so we return 9325 * that. 9326 */ 9327 if (*ret == 0) 9328 *ret = 100; 9329 return 0; 9330 default: 9331 pr_crit("wrong parameter: %d", what); 9332 return -EINVAL; 9333 } 9334 } 9335 9336 static int tpacpi_battery_set(int what, int battery, int value) 9337 { 9338 int param, ret; 9339 /* The first 8 bits are the value of the threshold */ 9340 param = value; 9341 /* The battery ID is in bits 8-9, 2 bits */ 9342 param |= battery << 8; 9343 9344 switch (what) { 9345 case THRESHOLD_START: 9346 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) { 9347 pr_err("failed to set charge threshold on battery %d", 9348 battery); 9349 return -ENODEV; 9350 } 9351 return 0; 9352 case THRESHOLD_STOP: 9353 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) { 9354 pr_err("failed to set stop threshold: %d", battery); 9355 return -ENODEV; 9356 } 9357 return 0; 9358 default: 9359 pr_crit("wrong parameter: %d", what); 9360 return -EINVAL; 9361 } 9362 } 9363 9364 static int tpacpi_battery_probe(int battery) 9365 { 9366 int ret = 0; 9367 9368 memset(&battery_info, 0, sizeof(struct tpacpi_battery_driver_data)); 9369 /* 9370 * 1) Get the current start threshold 9371 * 2) Check for support 9372 * 3) Get the current stop threshold 9373 * 4) Check for support 9374 */ 9375 if (acpi_has_method(hkey_handle, GET_START)) { 9376 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { 9377 pr_err("Error probing battery %d\n", battery); 9378 return -ENODEV; 9379 } 9380 /* Individual addressing is in bit 9 */ 9381 if (ret & BIT(9)) 9382 battery_info.individual_addressing = true; 9383 /* Support is marked in bit 8 */ 9384 if (ret & BIT(8)) 9385 battery_info.batteries[battery].start_support = 1; 9386 else 9387 return -ENODEV; 9388 if (tpacpi_battery_get(THRESHOLD_START, battery, 9389 &battery_info.batteries[battery].charge_start)) { 9390 pr_err("Error probing battery %d\n", battery); 9391 return -ENODEV; 9392 } 9393 } 9394 if (acpi_has_method(hkey_handle, GET_STOP)) { 9395 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) { 9396 pr_err("Error probing battery stop; %d\n", battery); 9397 return -ENODEV; 9398 } 9399 /* Support is marked in bit 8 */ 9400 if (ret & BIT(8)) 9401 battery_info.batteries[battery].stop_support = 1; 9402 else 9403 return -ENODEV; 9404 if (tpacpi_battery_get(THRESHOLD_STOP, battery, 9405 &battery_info.batteries[battery].charge_stop)) { 9406 pr_err("Error probing battery stop: %d\n", battery); 9407 return -ENODEV; 9408 } 9409 } 9410 pr_info("battery %d registered (start %d, stop %d)", 9411 battery, 9412 battery_info.batteries[battery].charge_start, 9413 battery_info.batteries[battery].charge_stop); 9414 9415 return 0; 9416 } 9417 9418 /* General helper functions */ 9419 9420 static int tpacpi_battery_get_id(const char *battery_name) 9421 { 9422 9423 if (strcmp(battery_name, "BAT0") == 0) 9424 return BAT_PRIMARY; 9425 if (strcmp(battery_name, "BAT1") == 0) 9426 return BAT_SECONDARY; 9427 /* 9428 * If for some reason the battery is not BAT0 nor is it 9429 * BAT1, we will assume it's the default, first battery, 9430 * AKA primary. 9431 */ 9432 pr_warn("unknown battery %s, assuming primary", battery_name); 9433 return BAT_PRIMARY; 9434 } 9435 9436 /* sysfs interface */ 9437 9438 static ssize_t tpacpi_battery_store(int what, 9439 struct device *dev, 9440 const char *buf, size_t count) 9441 { 9442 struct power_supply *supply = to_power_supply(dev); 9443 unsigned long value; 9444 int battery, rval; 9445 /* 9446 * Some systems have support for more than 9447 * one battery. If that is the case, 9448 * tpacpi_battery_probe marked that addressing 9449 * them individually is supported, so we do that 9450 * based on the device struct. 9451 * 9452 * On systems that are not supported, we assume 9453 * the primary as most of the ACPI calls fail 9454 * with "Any Battery" as the parameter. 9455 */ 9456 if (battery_info.individual_addressing) 9457 /* BAT_PRIMARY or BAT_SECONDARY */ 9458 battery = tpacpi_battery_get_id(supply->desc->name); 9459 else 9460 battery = BAT_PRIMARY; 9461 9462 rval = kstrtoul(buf, 10, &value); 9463 if (rval) 9464 return rval; 9465 9466 switch (what) { 9467 case THRESHOLD_START: 9468 if (!battery_info.batteries[battery].start_support) 9469 return -ENODEV; 9470 /* valid values are [0, 99] */ 9471 if (value < 0 || value > 99) 9472 return -EINVAL; 9473 if (value > battery_info.batteries[battery].charge_stop) 9474 return -EINVAL; 9475 if (tpacpi_battery_set(THRESHOLD_START, battery, value)) 9476 return -ENODEV; 9477 battery_info.batteries[battery].charge_start = value; 9478 return count; 9479 9480 case THRESHOLD_STOP: 9481 if (!battery_info.batteries[battery].stop_support) 9482 return -ENODEV; 9483 /* valid values are [1, 100] */ 9484 if (value < 1 || value > 100) 9485 return -EINVAL; 9486 if (value < battery_info.batteries[battery].charge_start) 9487 return -EINVAL; 9488 battery_info.batteries[battery].charge_stop = value; 9489 /* 9490 * When 100 is passed to stop, we need to flip 9491 * it to 0 as that the EC understands that as 9492 * "Default", which will charge to 100% 9493 */ 9494 if (value == 100) 9495 value = 0; 9496 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value)) 9497 return -EINVAL; 9498 return count; 9499 default: 9500 pr_crit("Wrong parameter: %d", what); 9501 return -EINVAL; 9502 } 9503 return count; 9504 } 9505 9506 static ssize_t tpacpi_battery_show(int what, 9507 struct device *dev, 9508 char *buf) 9509 { 9510 struct power_supply *supply = to_power_supply(dev); 9511 int ret, battery; 9512 /* 9513 * Some systems have support for more than 9514 * one battery. If that is the case, 9515 * tpacpi_battery_probe marked that addressing 9516 * them individually is supported, so we; 9517 * based on the device struct. 9518 * 9519 * On systems that are not supported, we assume 9520 * the primary as most of the ACPI calls fail 9521 * with "Any Battery" as the parameter. 9522 */ 9523 if (battery_info.individual_addressing) 9524 /* BAT_PRIMARY or BAT_SECONDARY */ 9525 battery = tpacpi_battery_get_id(supply->desc->name); 9526 else 9527 battery = BAT_PRIMARY; 9528 if (tpacpi_battery_get(what, battery, &ret)) 9529 return -ENODEV; 9530 return sprintf(buf, "%d\n", ret); 9531 } 9532 9533 static ssize_t charge_start_threshold_show(struct device *device, 9534 struct device_attribute *attr, 9535 char *buf) 9536 { 9537 return tpacpi_battery_show(THRESHOLD_START, device, buf); 9538 } 9539 9540 static ssize_t charge_stop_threshold_show(struct device *device, 9541 struct device_attribute *attr, 9542 char *buf) 9543 { 9544 return tpacpi_battery_show(THRESHOLD_STOP, device, buf); 9545 } 9546 9547 static ssize_t charge_start_threshold_store(struct device *dev, 9548 struct device_attribute *attr, 9549 const char *buf, size_t count) 9550 { 9551 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count); 9552 } 9553 9554 static ssize_t charge_stop_threshold_store(struct device *dev, 9555 struct device_attribute *attr, 9556 const char *buf, size_t count) 9557 { 9558 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count); 9559 } 9560 9561 static DEVICE_ATTR_RW(charge_start_threshold); 9562 static DEVICE_ATTR_RW(charge_stop_threshold); 9563 9564 static struct attribute *tpacpi_battery_attrs[] = { 9565 &dev_attr_charge_start_threshold.attr, 9566 &dev_attr_charge_stop_threshold.attr, 9567 NULL, 9568 }; 9569 9570 ATTRIBUTE_GROUPS(tpacpi_battery); 9571 9572 /* ACPI battery hooking */ 9573 9574 static int tpacpi_battery_add(struct power_supply *battery) 9575 { 9576 int batteryid = tpacpi_battery_get_id(battery->desc->name); 9577 9578 if (tpacpi_battery_probe(batteryid)) 9579 return -ENODEV; 9580 if (device_add_groups(&battery->dev, tpacpi_battery_groups)) 9581 return -ENODEV; 9582 return 0; 9583 } 9584 9585 static int tpacpi_battery_remove(struct power_supply *battery) 9586 { 9587 device_remove_groups(&battery->dev, tpacpi_battery_groups); 9588 return 0; 9589 } 9590 9591 static struct acpi_battery_hook battery_hook = { 9592 .add_battery = tpacpi_battery_add, 9593 .remove_battery = tpacpi_battery_remove, 9594 .name = "ThinkPad Battery Extension", 9595 }; 9596 9597 /* Subdriver init/exit */ 9598 9599 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm) 9600 { 9601 battery_hook_register(&battery_hook); 9602 return 0; 9603 } 9604 9605 static void tpacpi_battery_exit(void) 9606 { 9607 battery_hook_unregister(&battery_hook); 9608 } 9609 9610 static struct ibm_struct battery_driver_data = { 9611 .name = "battery", 9612 .exit = tpacpi_battery_exit, 9613 }; 9614 9615 /**************************************************************************** 9616 **************************************************************************** 9617 * 9618 * Infrastructure 9619 * 9620 **************************************************************************** 9621 ****************************************************************************/ 9622 9623 /* 9624 * HKEY event callout for other subdrivers go here 9625 * (yes, it is ugly, but it is quick, safe, and gets the job done 9626 */ 9627 static void tpacpi_driver_event(const unsigned int hkey_event) 9628 { 9629 if (ibm_backlight_device) { 9630 switch (hkey_event) { 9631 case TP_HKEY_EV_BRGHT_UP: 9632 case TP_HKEY_EV_BRGHT_DOWN: 9633 tpacpi_brightness_notify_change(); 9634 } 9635 } 9636 if (alsa_card) { 9637 switch (hkey_event) { 9638 case TP_HKEY_EV_VOL_UP: 9639 case TP_HKEY_EV_VOL_DOWN: 9640 case TP_HKEY_EV_VOL_MUTE: 9641 volume_alsa_notify_change(); 9642 } 9643 } 9644 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) { 9645 enum led_brightness brightness; 9646 9647 mutex_lock(&kbdlight_mutex); 9648 9649 /* 9650 * Check the brightness actually changed, setting the brightness 9651 * through kbdlight_set_level() also triggers this event. 9652 */ 9653 brightness = kbdlight_sysfs_get(NULL); 9654 if (kbdlight_brightness != brightness) { 9655 kbdlight_brightness = brightness; 9656 led_classdev_notify_brightness_hw_changed( 9657 &tpacpi_led_kbdlight.led_classdev, brightness); 9658 } 9659 9660 mutex_unlock(&kbdlight_mutex); 9661 } 9662 } 9663 9664 static void hotkey_driver_event(const unsigned int scancode) 9665 { 9666 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9667 } 9668 9669 /* --------------------------------------------------------------------- */ 9670 9671 /* /proc support */ 9672 static struct proc_dir_entry *proc_dir; 9673 9674 /* 9675 * Module and infrastructure proble, init and exit handling 9676 */ 9677 9678 static bool force_load; 9679 9680 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9681 static const char * __init str_supported(int is_supported) 9682 { 9683 static char text_unsupported[] __initdata = "not supported"; 9684 9685 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9686 } 9687 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9688 9689 static void ibm_exit(struct ibm_struct *ibm) 9690 { 9691 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9692 9693 list_del_init(&ibm->all_drivers); 9694 9695 if (ibm->flags.acpi_notify_installed) { 9696 dbg_printk(TPACPI_DBG_EXIT, 9697 "%s: acpi_remove_notify_handler\n", ibm->name); 9698 BUG_ON(!ibm->acpi); 9699 acpi_remove_notify_handler(*ibm->acpi->handle, 9700 ibm->acpi->type, 9701 dispatch_acpi_notify); 9702 ibm->flags.acpi_notify_installed = 0; 9703 } 9704 9705 if (ibm->flags.proc_created) { 9706 dbg_printk(TPACPI_DBG_EXIT, 9707 "%s: remove_proc_entry\n", ibm->name); 9708 remove_proc_entry(ibm->name, proc_dir); 9709 ibm->flags.proc_created = 0; 9710 } 9711 9712 if (ibm->flags.acpi_driver_registered) { 9713 dbg_printk(TPACPI_DBG_EXIT, 9714 "%s: acpi_bus_unregister_driver\n", ibm->name); 9715 BUG_ON(!ibm->acpi); 9716 acpi_bus_unregister_driver(ibm->acpi->driver); 9717 kfree(ibm->acpi->driver); 9718 ibm->acpi->driver = NULL; 9719 ibm->flags.acpi_driver_registered = 0; 9720 } 9721 9722 if (ibm->flags.init_called && ibm->exit) { 9723 ibm->exit(); 9724 ibm->flags.init_called = 0; 9725 } 9726 9727 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9728 } 9729 9730 static int __init ibm_init(struct ibm_init_struct *iibm) 9731 { 9732 int ret; 9733 struct ibm_struct *ibm = iibm->data; 9734 struct proc_dir_entry *entry; 9735 9736 BUG_ON(ibm == NULL); 9737 9738 INIT_LIST_HEAD(&ibm->all_drivers); 9739 9740 if (ibm->flags.experimental && !experimental) 9741 return 0; 9742 9743 dbg_printk(TPACPI_DBG_INIT, 9744 "probing for %s\n", ibm->name); 9745 9746 if (iibm->init) { 9747 ret = iibm->init(iibm); 9748 if (ret > 0) 9749 return 0; /* probe failed */ 9750 if (ret) 9751 return ret; 9752 9753 ibm->flags.init_called = 1; 9754 } 9755 9756 if (ibm->acpi) { 9757 if (ibm->acpi->hid) { 9758 ret = register_tpacpi_subdriver(ibm); 9759 if (ret) 9760 goto err_out; 9761 } 9762 9763 if (ibm->acpi->notify) { 9764 ret = setup_acpi_notify(ibm); 9765 if (ret == -ENODEV) { 9766 pr_notice("disabling subdriver %s\n", 9767 ibm->name); 9768 ret = 0; 9769 goto err_out; 9770 } 9771 if (ret < 0) 9772 goto err_out; 9773 } 9774 } 9775 9776 dbg_printk(TPACPI_DBG_INIT, 9777 "%s installed\n", ibm->name); 9778 9779 if (ibm->read) { 9780 umode_t mode = iibm->base_procfs_mode; 9781 9782 if (!mode) 9783 mode = S_IRUGO; 9784 if (ibm->write) 9785 mode |= S_IWUSR; 9786 entry = proc_create_data(ibm->name, mode, proc_dir, 9787 &dispatch_proc_fops, ibm); 9788 if (!entry) { 9789 pr_err("unable to create proc entry %s\n", ibm->name); 9790 ret = -ENODEV; 9791 goto err_out; 9792 } 9793 ibm->flags.proc_created = 1; 9794 } 9795 9796 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9797 9798 return 0; 9799 9800 err_out: 9801 dbg_printk(TPACPI_DBG_INIT, 9802 "%s: at error exit path with result %d\n", 9803 ibm->name, ret); 9804 9805 ibm_exit(ibm); 9806 return (ret < 0) ? ret : 0; 9807 } 9808 9809 /* Probing */ 9810 9811 static bool __pure __init tpacpi_is_fw_digit(const char c) 9812 { 9813 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 9814 } 9815 9816 static bool __pure __init tpacpi_is_valid_fw_id(const char * const s, 9817 const char t) 9818 { 9819 /* 9820 * Most models: xxyTkkWW (#.##c) 9821 * Ancient 570/600 and -SL lacks (#.##c) 9822 */ 9823 if (s && strlen(s) >= 8 && 9824 tpacpi_is_fw_digit(s[0]) && 9825 tpacpi_is_fw_digit(s[1]) && 9826 s[2] == t && 9827 (s[3] == 'T' || s[3] == 'N') && 9828 tpacpi_is_fw_digit(s[4]) && 9829 tpacpi_is_fw_digit(s[5])) 9830 return true; 9831 9832 /* New models: xxxyTkkW (#.##c); T550 and some others */ 9833 return s && strlen(s) >= 8 && 9834 tpacpi_is_fw_digit(s[0]) && 9835 tpacpi_is_fw_digit(s[1]) && 9836 tpacpi_is_fw_digit(s[2]) && 9837 s[3] == t && 9838 (s[4] == 'T' || s[4] == 'N') && 9839 tpacpi_is_fw_digit(s[5]) && 9840 tpacpi_is_fw_digit(s[6]); 9841 } 9842 9843 /* returns 0 - probe ok, or < 0 - probe error. 9844 * Probe ok doesn't mean thinkpad found. 9845 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 9846 static int __must_check __init get_thinkpad_model_data( 9847 struct thinkpad_id_data *tp) 9848 { 9849 const struct dmi_device *dev = NULL; 9850 char ec_fw_string[18]; 9851 char const *s; 9852 9853 if (!tp) 9854 return -EINVAL; 9855 9856 memset(tp, 0, sizeof(*tp)); 9857 9858 if (dmi_name_in_vendors("IBM")) 9859 tp->vendor = PCI_VENDOR_ID_IBM; 9860 else if (dmi_name_in_vendors("LENOVO")) 9861 tp->vendor = PCI_VENDOR_ID_LENOVO; 9862 else 9863 return 0; 9864 9865 s = dmi_get_system_info(DMI_BIOS_VERSION); 9866 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 9867 if (s && !tp->bios_version_str) 9868 return -ENOMEM; 9869 9870 /* Really ancient ThinkPad 240X will fail this, which is fine */ 9871 if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') || 9872 tpacpi_is_valid_fw_id(tp->bios_version_str, 'C'))) 9873 return 0; 9874 9875 tp->bios_model = tp->bios_version_str[0] 9876 | (tp->bios_version_str[1] << 8); 9877 tp->bios_release = (tp->bios_version_str[4] << 8) 9878 | tp->bios_version_str[5]; 9879 9880 /* 9881 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 9882 * X32 or newer, all Z series; Some models must have an 9883 * up-to-date BIOS or they will not be detected. 9884 * 9885 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9886 */ 9887 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 9888 if (sscanf(dev->name, 9889 "IBM ThinkPad Embedded Controller -[%17c", 9890 ec_fw_string) == 1) { 9891 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 9892 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 9893 9894 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 9895 if (!tp->ec_version_str) 9896 return -ENOMEM; 9897 9898 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 9899 tp->ec_model = ec_fw_string[0] 9900 | (ec_fw_string[1] << 8); 9901 tp->ec_release = (ec_fw_string[4] << 8) 9902 | ec_fw_string[5]; 9903 } else { 9904 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n", 9905 ec_fw_string); 9906 pr_notice("please report this to %s\n", 9907 TPACPI_MAIL); 9908 } 9909 break; 9910 } 9911 } 9912 9913 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 9914 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 9915 tp->model_str = kstrdup(s, GFP_KERNEL); 9916 if (!tp->model_str) 9917 return -ENOMEM; 9918 } else { 9919 s = dmi_get_system_info(DMI_BIOS_VENDOR); 9920 if (s && !(strncasecmp(s, "Lenovo", 6))) { 9921 tp->model_str = kstrdup(s, GFP_KERNEL); 9922 if (!tp->model_str) 9923 return -ENOMEM; 9924 } 9925 } 9926 9927 s = dmi_get_system_info(DMI_PRODUCT_NAME); 9928 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 9929 if (s && !tp->nummodel_str) 9930 return -ENOMEM; 9931 9932 return 0; 9933 } 9934 9935 static int __init probe_for_thinkpad(void) 9936 { 9937 int is_thinkpad; 9938 9939 if (acpi_disabled) 9940 return -ENODEV; 9941 9942 /* It would be dangerous to run the driver in this case */ 9943 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 9944 return -ENODEV; 9945 9946 /* 9947 * Non-ancient models have better DMI tagging, but very old models 9948 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 9949 */ 9950 is_thinkpad = (thinkpad_id.model_str != NULL) || 9951 (thinkpad_id.ec_model != 0) || 9952 tpacpi_is_fw_known(); 9953 9954 /* The EC handler is required */ 9955 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 9956 if (!ec_handle) { 9957 if (is_thinkpad) 9958 pr_err("Not yet supported ThinkPad detected!\n"); 9959 return -ENODEV; 9960 } 9961 9962 if (!is_thinkpad && !force_load) 9963 return -ENODEV; 9964 9965 return 0; 9966 } 9967 9968 static void __init thinkpad_acpi_init_banner(void) 9969 { 9970 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 9971 pr_info("%s\n", TPACPI_URL); 9972 9973 pr_info("ThinkPad BIOS %s, EC %s\n", 9974 (thinkpad_id.bios_version_str) ? 9975 thinkpad_id.bios_version_str : "unknown", 9976 (thinkpad_id.ec_version_str) ? 9977 thinkpad_id.ec_version_str : "unknown"); 9978 9979 BUG_ON(!thinkpad_id.vendor); 9980 9981 if (thinkpad_id.model_str) 9982 pr_info("%s %s, model %s\n", 9983 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 9984 "IBM" : ((thinkpad_id.vendor == 9985 PCI_VENDOR_ID_LENOVO) ? 9986 "Lenovo" : "Unknown vendor"), 9987 thinkpad_id.model_str, 9988 (thinkpad_id.nummodel_str) ? 9989 thinkpad_id.nummodel_str : "unknown"); 9990 } 9991 9992 /* Module init, exit, parameters */ 9993 9994 static struct ibm_init_struct ibms_init[] __initdata = { 9995 { 9996 .data = &thinkpad_acpi_driver_data, 9997 }, 9998 { 9999 .init = hotkey_init, 10000 .data = &hotkey_driver_data, 10001 }, 10002 { 10003 .init = bluetooth_init, 10004 .data = &bluetooth_driver_data, 10005 }, 10006 { 10007 .init = wan_init, 10008 .data = &wan_driver_data, 10009 }, 10010 { 10011 .init = uwb_init, 10012 .data = &uwb_driver_data, 10013 }, 10014 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 10015 { 10016 .init = video_init, 10017 .base_procfs_mode = S_IRUSR, 10018 .data = &video_driver_data, 10019 }, 10020 #endif 10021 { 10022 .init = kbdlight_init, 10023 .data = &kbdlight_driver_data, 10024 }, 10025 { 10026 .init = light_init, 10027 .data = &light_driver_data, 10028 }, 10029 { 10030 .init = cmos_init, 10031 .data = &cmos_driver_data, 10032 }, 10033 { 10034 .init = led_init, 10035 .data = &led_driver_data, 10036 }, 10037 { 10038 .init = beep_init, 10039 .data = &beep_driver_data, 10040 }, 10041 { 10042 .init = thermal_init, 10043 .data = &thermal_driver_data, 10044 }, 10045 { 10046 .init = brightness_init, 10047 .data = &brightness_driver_data, 10048 }, 10049 { 10050 .init = volume_init, 10051 .data = &volume_driver_data, 10052 }, 10053 { 10054 .init = fan_init, 10055 .data = &fan_driver_data, 10056 }, 10057 { 10058 .init = mute_led_init, 10059 .data = &mute_led_driver_data, 10060 }, 10061 { 10062 .init = tpacpi_battery_init, 10063 .data = &battery_driver_data, 10064 }, 10065 }; 10066 10067 static int __init set_ibm_param(const char *val, const struct kernel_param *kp) 10068 { 10069 unsigned int i; 10070 struct ibm_struct *ibm; 10071 10072 if (!kp || !kp->name || !val) 10073 return -EINVAL; 10074 10075 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10076 ibm = ibms_init[i].data; 10077 WARN_ON(ibm == NULL); 10078 10079 if (!ibm || !ibm->name) 10080 continue; 10081 10082 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 10083 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 10084 return -ENOSPC; 10085 strcpy(ibms_init[i].param, val); 10086 strcat(ibms_init[i].param, ","); 10087 return 0; 10088 } 10089 } 10090 10091 return -EINVAL; 10092 } 10093 10094 module_param(experimental, int, 0444); 10095 MODULE_PARM_DESC(experimental, 10096 "Enables experimental features when non-zero"); 10097 10098 module_param_named(debug, dbg_level, uint, 0); 10099 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 10100 10101 module_param(force_load, bool, 0444); 10102 MODULE_PARM_DESC(force_load, 10103 "Attempts to load the driver even on a mis-identified ThinkPad when true"); 10104 10105 module_param_named(fan_control, fan_control_allowed, bool, 0444); 10106 MODULE_PARM_DESC(fan_control, 10107 "Enables setting fan parameters features when true"); 10108 10109 module_param_named(brightness_mode, brightness_mode, uint, 0444); 10110 MODULE_PARM_DESC(brightness_mode, 10111 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 10112 10113 module_param(brightness_enable, uint, 0444); 10114 MODULE_PARM_DESC(brightness_enable, 10115 "Enables backlight control when 1, disables when 0"); 10116 10117 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 10118 module_param_named(volume_mode, volume_mode, uint, 0444); 10119 MODULE_PARM_DESC(volume_mode, 10120 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 10121 10122 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 10123 MODULE_PARM_DESC(volume_capabilities, 10124 "Selects the mixer capabilites: 0=auto, 1=volume and mute, 2=mute only"); 10125 10126 module_param_named(volume_control, volume_control_allowed, bool, 0444); 10127 MODULE_PARM_DESC(volume_control, 10128 "Enables software override for the console audio control when true"); 10129 10130 module_param_named(software_mute, software_mute_requested, bool, 0444); 10131 MODULE_PARM_DESC(software_mute, 10132 "Request full software mute control"); 10133 10134 /* ALSA module API parameters */ 10135 module_param_named(index, alsa_index, int, 0444); 10136 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 10137 module_param_named(id, alsa_id, charp, 0444); 10138 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 10139 module_param_named(enable, alsa_enable, bool, 0444); 10140 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 10141 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 10142 10143 /* The module parameter can't be read back, that's why 0 is used here */ 10144 #define TPACPI_PARAM(feature) \ 10145 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 10146 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation") 10147 10148 TPACPI_PARAM(hotkey); 10149 TPACPI_PARAM(bluetooth); 10150 TPACPI_PARAM(video); 10151 TPACPI_PARAM(light); 10152 TPACPI_PARAM(cmos); 10153 TPACPI_PARAM(led); 10154 TPACPI_PARAM(beep); 10155 TPACPI_PARAM(brightness); 10156 TPACPI_PARAM(volume); 10157 TPACPI_PARAM(fan); 10158 10159 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10160 module_param(dbg_wlswemul, uint, 0444); 10161 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 10162 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 10163 MODULE_PARM_DESC(wlsw_state, 10164 "Initial state of the emulated WLSW switch"); 10165 10166 module_param(dbg_bluetoothemul, uint, 0444); 10167 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 10168 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 10169 MODULE_PARM_DESC(bluetooth_state, 10170 "Initial state of the emulated bluetooth switch"); 10171 10172 module_param(dbg_wwanemul, uint, 0444); 10173 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 10174 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 10175 MODULE_PARM_DESC(wwan_state, 10176 "Initial state of the emulated WWAN switch"); 10177 10178 module_param(dbg_uwbemul, uint, 0444); 10179 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 10180 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 10181 MODULE_PARM_DESC(uwb_state, 10182 "Initial state of the emulated UWB switch"); 10183 #endif 10184 10185 static void thinkpad_acpi_module_exit(void) 10186 { 10187 struct ibm_struct *ibm, *itmp; 10188 10189 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 10190 10191 list_for_each_entry_safe_reverse(ibm, itmp, 10192 &tpacpi_all_drivers, 10193 all_drivers) { 10194 ibm_exit(ibm); 10195 } 10196 10197 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 10198 10199 if (tpacpi_inputdev) { 10200 if (tp_features.input_device_registered) 10201 input_unregister_device(tpacpi_inputdev); 10202 else 10203 input_free_device(tpacpi_inputdev); 10204 kfree(hotkey_keycode_map); 10205 } 10206 10207 if (tpacpi_hwmon) 10208 hwmon_device_unregister(tpacpi_hwmon); 10209 10210 if (tpacpi_sensors_pdev) 10211 platform_device_unregister(tpacpi_sensors_pdev); 10212 if (tpacpi_pdev) 10213 platform_device_unregister(tpacpi_pdev); 10214 10215 if (tp_features.sensors_pdrv_attrs_registered) 10216 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 10217 if (tp_features.platform_drv_attrs_registered) 10218 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 10219 10220 if (tp_features.sensors_pdrv_registered) 10221 platform_driver_unregister(&tpacpi_hwmon_pdriver); 10222 10223 if (tp_features.platform_drv_registered) 10224 platform_driver_unregister(&tpacpi_pdriver); 10225 10226 if (proc_dir) 10227 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 10228 10229 if (tpacpi_wq) 10230 destroy_workqueue(tpacpi_wq); 10231 10232 kfree(thinkpad_id.bios_version_str); 10233 kfree(thinkpad_id.ec_version_str); 10234 kfree(thinkpad_id.model_str); 10235 kfree(thinkpad_id.nummodel_str); 10236 } 10237 10238 10239 static int __init thinkpad_acpi_module_init(void) 10240 { 10241 int ret, i; 10242 10243 tpacpi_lifecycle = TPACPI_LIFE_INIT; 10244 10245 /* Driver-level probe */ 10246 10247 ret = get_thinkpad_model_data(&thinkpad_id); 10248 if (ret) { 10249 pr_err("unable to get DMI data: %d\n", ret); 10250 thinkpad_acpi_module_exit(); 10251 return ret; 10252 } 10253 ret = probe_for_thinkpad(); 10254 if (ret) { 10255 thinkpad_acpi_module_exit(); 10256 return ret; 10257 } 10258 10259 /* Driver initialization */ 10260 10261 thinkpad_acpi_init_banner(); 10262 tpacpi_check_outdated_fw(); 10263 10264 TPACPI_ACPIHANDLE_INIT(ecrd); 10265 TPACPI_ACPIHANDLE_INIT(ecwr); 10266 10267 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 10268 if (!tpacpi_wq) { 10269 thinkpad_acpi_module_exit(); 10270 return -ENOMEM; 10271 } 10272 10273 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 10274 if (!proc_dir) { 10275 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 10276 thinkpad_acpi_module_exit(); 10277 return -ENODEV; 10278 } 10279 10280 ret = platform_driver_register(&tpacpi_pdriver); 10281 if (ret) { 10282 pr_err("unable to register main platform driver\n"); 10283 thinkpad_acpi_module_exit(); 10284 return ret; 10285 } 10286 tp_features.platform_drv_registered = 1; 10287 10288 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 10289 if (ret) { 10290 pr_err("unable to register hwmon platform driver\n"); 10291 thinkpad_acpi_module_exit(); 10292 return ret; 10293 } 10294 tp_features.sensors_pdrv_registered = 1; 10295 10296 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 10297 if (!ret) { 10298 tp_features.platform_drv_attrs_registered = 1; 10299 ret = tpacpi_create_driver_attributes( 10300 &tpacpi_hwmon_pdriver.driver); 10301 } 10302 if (ret) { 10303 pr_err("unable to create sysfs driver attributes\n"); 10304 thinkpad_acpi_module_exit(); 10305 return ret; 10306 } 10307 tp_features.sensors_pdrv_attrs_registered = 1; 10308 10309 10310 /* Device initialization */ 10311 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 10312 NULL, 0); 10313 if (IS_ERR(tpacpi_pdev)) { 10314 ret = PTR_ERR(tpacpi_pdev); 10315 tpacpi_pdev = NULL; 10316 pr_err("unable to register platform device\n"); 10317 thinkpad_acpi_module_exit(); 10318 return ret; 10319 } 10320 tpacpi_sensors_pdev = platform_device_register_simple( 10321 TPACPI_HWMON_DRVR_NAME, 10322 -1, NULL, 0); 10323 if (IS_ERR(tpacpi_sensors_pdev)) { 10324 ret = PTR_ERR(tpacpi_sensors_pdev); 10325 tpacpi_sensors_pdev = NULL; 10326 pr_err("unable to register hwmon platform device\n"); 10327 thinkpad_acpi_module_exit(); 10328 return ret; 10329 } 10330 tp_features.sensors_pdev_attrs_registered = 1; 10331 tpacpi_hwmon = hwmon_device_register_with_groups( 10332 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL); 10333 10334 if (IS_ERR(tpacpi_hwmon)) { 10335 ret = PTR_ERR(tpacpi_hwmon); 10336 tpacpi_hwmon = NULL; 10337 pr_err("unable to register hwmon device\n"); 10338 thinkpad_acpi_module_exit(); 10339 return ret; 10340 } 10341 mutex_init(&tpacpi_inputdev_send_mutex); 10342 tpacpi_inputdev = input_allocate_device(); 10343 if (!tpacpi_inputdev) { 10344 thinkpad_acpi_module_exit(); 10345 return -ENOMEM; 10346 } else { 10347 /* Prepare input device, but don't register */ 10348 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 10349 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 10350 tpacpi_inputdev->id.bustype = BUS_HOST; 10351 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 10352 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 10353 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 10354 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 10355 } 10356 10357 /* Init subdriver dependencies */ 10358 tpacpi_detect_brightness_capabilities(); 10359 10360 /* Init subdrivers */ 10361 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10362 ret = ibm_init(&ibms_init[i]); 10363 if (ret >= 0 && *ibms_init[i].param) 10364 ret = ibms_init[i].data->write(ibms_init[i].param); 10365 if (ret < 0) { 10366 thinkpad_acpi_module_exit(); 10367 return ret; 10368 } 10369 } 10370 10371 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 10372 10373 ret = input_register_device(tpacpi_inputdev); 10374 if (ret < 0) { 10375 pr_err("unable to register input device\n"); 10376 thinkpad_acpi_module_exit(); 10377 return ret; 10378 } else { 10379 tp_features.input_device_registered = 1; 10380 } 10381 10382 return 0; 10383 } 10384 10385 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 10386 10387 /* 10388 * This will autoload the driver in almost every ThinkPad 10389 * in widespread use. 10390 * 10391 * Only _VERY_ old models, like the 240, 240x and 570 lack 10392 * the HKEY event interface. 10393 */ 10394 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 10395 10396 /* 10397 * DMI matching for module autoloading 10398 * 10399 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10400 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 10401 * 10402 * Only models listed in thinkwiki will be supported, so add yours 10403 * if it is not there yet. 10404 */ 10405 #define IBM_BIOS_MODULE_ALIAS(__type) \ 10406 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 10407 10408 /* Ancient thinkpad BIOSes have to be identified by 10409 * BIOS type or model number, and there are far less 10410 * BIOS types than model numbers... */ 10411 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 10412 10413 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 10414 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 10415 MODULE_DESCRIPTION(TPACPI_DESC); 10416 MODULE_VERSION(TPACPI_VERSION); 10417 MODULE_LICENSE("GPL"); 10418 10419 module_init(thinkpad_acpi_module_init); 10420 module_exit(thinkpad_acpi_module_exit); 10421