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/sched/signal.h> 61 #include <linux/kthread.h> 62 #include <linux/freezer.h> 63 #include <linux/delay.h> 64 #include <linux/slab.h> 65 #include <linux/nvram.h> 66 #include <linux/proc_fs.h> 67 #include <linux/seq_file.h> 68 #include <linux/sysfs.h> 69 #include <linux/backlight.h> 70 #include <linux/bitops.h> 71 #include <linux/fb.h> 72 #include <linux/platform_device.h> 73 #include <linux/hwmon.h> 74 #include <linux/hwmon-sysfs.h> 75 #include <linux/input.h> 76 #include <linux/leds.h> 77 #include <linux/rfkill.h> 78 #include <linux/dmi.h> 79 #include <linux/jiffies.h> 80 #include <linux/workqueue.h> 81 #include <linux/acpi.h> 82 #include <linux/pci_ids.h> 83 #include <linux/power_supply.h> 84 #include <linux/thinkpad_acpi.h> 85 #include <sound/core.h> 86 #include <sound/control.h> 87 #include <sound/initval.h> 88 #include <linux/uaccess.h> 89 #include <acpi/battery.h> 90 #include <acpi/video.h> 91 92 /* ThinkPad CMOS commands */ 93 #define TP_CMOS_VOLUME_DOWN 0 94 #define TP_CMOS_VOLUME_UP 1 95 #define TP_CMOS_VOLUME_MUTE 2 96 #define TP_CMOS_BRIGHTNESS_UP 4 97 #define TP_CMOS_BRIGHTNESS_DOWN 5 98 #define TP_CMOS_THINKLIGHT_ON 12 99 #define TP_CMOS_THINKLIGHT_OFF 13 100 101 /* NVRAM Addresses */ 102 enum tp_nvram_addr { 103 TP_NVRAM_ADDR_HK2 = 0x57, 104 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 105 TP_NVRAM_ADDR_VIDEO = 0x59, 106 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 107 TP_NVRAM_ADDR_MIXER = 0x60, 108 }; 109 110 /* NVRAM bit masks */ 111 enum { 112 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 113 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 114 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 115 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 116 TP_NVRAM_MASK_THINKLIGHT = 0x10, 117 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 118 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 119 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 120 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 121 TP_NVRAM_MASK_MUTE = 0x40, 122 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 123 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 124 TP_NVRAM_POS_LEVEL_VOLUME = 0, 125 }; 126 127 /* Misc NVRAM-related */ 128 enum { 129 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 130 }; 131 132 /* ACPI HIDs */ 133 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 134 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 135 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID "LEN0268" 136 #define TPACPI_ACPI_EC_HID "PNP0C09" 137 138 /* Input IDs */ 139 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 140 #define TPACPI_HKEY_INPUT_VERSION 0x4101 141 142 /* ACPI \WGSV commands */ 143 enum { 144 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 145 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 146 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 147 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 148 }; 149 150 /* TP_ACPI_WGSV_GET_STATE bits */ 151 enum { 152 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 153 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 154 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 155 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 156 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 157 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 158 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 159 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 160 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 161 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 162 }; 163 164 /* HKEY events */ 165 enum tpacpi_hkey_event_t { 166 /* Hotkey-related */ 167 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 168 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 169 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 170 TP_HKEY_EV_KBD_LIGHT = 0x1012, /* Thinklight/kbd backlight */ 171 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 172 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 173 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 174 175 /* Reasons for waking up from S3/S4 */ 176 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 177 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 178 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 179 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 180 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 181 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 182 183 /* Auto-sleep after eject request */ 184 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 185 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 186 187 /* Misc bay events */ 188 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 189 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 190 or port replicator */ 191 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 192 dock or port replicator */ 193 194 /* User-interface events */ 195 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 196 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 197 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 198 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 199 TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016): 200 * enter/leave tablet mode 201 */ 202 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 203 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 204 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 205 206 /* Key-related user-interface events */ 207 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 208 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 209 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */ 210 211 /* Thermal events */ 212 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 213 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 214 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 215 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 216 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* windows; thermal table changed */ 217 TP_HKEY_EV_THM_CSM_COMPLETED = 0x6032, /* windows; thermal control set 218 * command completed. Related to 219 * AML DYTC */ 220 TP_HKEY_EV_THM_TRANSFM_CHANGED = 0x60F0, /* windows; thermal transformation 221 * changed. Related to AML GMTS */ 222 223 /* AC-related events */ 224 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 225 226 /* Further user-interface events */ 227 TP_HKEY_EV_PALM_DETECTED = 0x60b0, /* palm hoveres keyboard */ 228 TP_HKEY_EV_PALM_UNDETECTED = 0x60b1, /* palm removed */ 229 230 /* Misc */ 231 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 232 }; 233 234 /**************************************************************************** 235 * Main driver 236 */ 237 238 #define TPACPI_NAME "thinkpad" 239 #define TPACPI_DESC "ThinkPad ACPI Extras" 240 #define TPACPI_FILE TPACPI_NAME "_acpi" 241 #define TPACPI_URL "http://ibm-acpi.sf.net/" 242 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 243 244 #define TPACPI_PROC_DIR "ibm" 245 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 246 #define TPACPI_DRVR_NAME TPACPI_FILE 247 #define TPACPI_DRVR_SHORTNAME "tpacpi" 248 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 249 250 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 251 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 252 253 #define TPACPI_MAX_ACPI_ARGS 3 254 255 /* Debugging printk groups */ 256 #define TPACPI_DBG_ALL 0xffff 257 #define TPACPI_DBG_DISCLOSETASK 0x8000 258 #define TPACPI_DBG_INIT 0x0001 259 #define TPACPI_DBG_EXIT 0x0002 260 #define TPACPI_DBG_RFKILL 0x0004 261 #define TPACPI_DBG_HKEY 0x0008 262 #define TPACPI_DBG_FAN 0x0010 263 #define TPACPI_DBG_BRGHT 0x0020 264 #define TPACPI_DBG_MIXER 0x0040 265 266 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 267 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 268 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 269 270 271 /**************************************************************************** 272 * Driver-wide structs and misc. variables 273 */ 274 275 struct ibm_struct; 276 277 struct tp_acpi_drv_struct { 278 const struct acpi_device_id *hid; 279 struct acpi_driver *driver; 280 281 void (*notify) (struct ibm_struct *, u32); 282 acpi_handle *handle; 283 u32 type; 284 struct acpi_device *device; 285 }; 286 287 struct ibm_struct { 288 char *name; 289 290 int (*read) (struct seq_file *); 291 int (*write) (char *); 292 void (*exit) (void); 293 void (*resume) (void); 294 void (*suspend) (void); 295 void (*shutdown) (void); 296 297 struct list_head all_drivers; 298 299 struct tp_acpi_drv_struct *acpi; 300 301 struct { 302 u8 acpi_driver_registered:1; 303 u8 acpi_notify_installed:1; 304 u8 proc_created:1; 305 u8 init_called:1; 306 u8 experimental:1; 307 } flags; 308 }; 309 310 struct ibm_init_struct { 311 char param[32]; 312 313 int (*init) (struct ibm_init_struct *); 314 umode_t base_procfs_mode; 315 struct ibm_struct *data; 316 }; 317 318 static struct { 319 u32 bluetooth:1; 320 u32 hotkey:1; 321 u32 hotkey_mask:1; 322 u32 hotkey_wlsw:1; 323 enum { 324 TP_HOTKEY_TABLET_NONE = 0, 325 TP_HOTKEY_TABLET_USES_MHKG, 326 TP_HOTKEY_TABLET_USES_GMMS, 327 } hotkey_tablet; 328 u32 kbdlight:1; 329 u32 light:1; 330 u32 light_status:1; 331 u32 bright_acpimode:1; 332 u32 bright_unkfw:1; 333 u32 wan:1; 334 u32 uwb:1; 335 u32 fan_ctrl_status_undef:1; 336 u32 second_fan:1; 337 u32 beep_needs_two_args:1; 338 u32 mixer_no_level_control:1; 339 u32 battery_force_primary:1; 340 u32 input_device_registered:1; 341 u32 platform_drv_registered:1; 342 u32 platform_drv_attrs_registered:1; 343 u32 sensors_pdrv_registered:1; 344 u32 sensors_pdrv_attrs_registered:1; 345 u32 sensors_pdev_attrs_registered:1; 346 u32 hotkey_poll_active:1; 347 u32 has_adaptive_kbd:1; 348 } tp_features; 349 350 static struct { 351 u16 hotkey_mask_ff:1; 352 u16 volume_ctrl_forbidden:1; 353 } tp_warned; 354 355 struct thinkpad_id_data { 356 unsigned int vendor; /* ThinkPad vendor: 357 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 358 359 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 360 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 361 362 u32 bios_model; /* 1Y = 0x3159, 0 = unknown */ 363 u32 ec_model; 364 u16 bios_release; /* 1ZETK1WW = 0x4b31, 0 = unknown */ 365 u16 ec_release; 366 367 char *model_str; /* ThinkPad T43 */ 368 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 369 }; 370 static struct thinkpad_id_data thinkpad_id; 371 372 static enum { 373 TPACPI_LIFE_INIT = 0, 374 TPACPI_LIFE_RUNNING, 375 TPACPI_LIFE_EXITING, 376 } tpacpi_lifecycle; 377 378 static int experimental; 379 static u32 dbg_level; 380 381 static struct workqueue_struct *tpacpi_wq; 382 383 enum led_status_t { 384 TPACPI_LED_OFF = 0, 385 TPACPI_LED_ON, 386 TPACPI_LED_BLINK, 387 }; 388 389 /* tpacpi LED class */ 390 struct tpacpi_led_classdev { 391 struct led_classdev led_classdev; 392 int led; 393 }; 394 395 /* brightness level capabilities */ 396 static unsigned int bright_maxlvl; /* 0 = unknown */ 397 398 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 399 static int dbg_wlswemul; 400 static bool tpacpi_wlsw_emulstate; 401 static int dbg_bluetoothemul; 402 static bool tpacpi_bluetooth_emulstate; 403 static int dbg_wwanemul; 404 static bool tpacpi_wwan_emulstate; 405 static int dbg_uwbemul; 406 static bool tpacpi_uwb_emulstate; 407 #endif 408 409 410 /************************************************************************* 411 * Debugging helpers 412 */ 413 414 #define dbg_printk(a_dbg_level, format, arg...) \ 415 do { \ 416 if (dbg_level & (a_dbg_level)) \ 417 printk(KERN_DEBUG pr_fmt("%s: " format), \ 418 __func__, ##arg); \ 419 } while (0) 420 421 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 422 #define vdbg_printk dbg_printk 423 static const char *str_supported(int is_supported); 424 #else 425 static inline const char *str_supported(int is_supported) { return ""; } 426 #define vdbg_printk(a_dbg_level, format, arg...) \ 427 do { if (0) no_printk(format, ##arg); } while (0) 428 #endif 429 430 static void tpacpi_log_usertask(const char * const what) 431 { 432 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 433 what, task_tgid_vnr(current)); 434 } 435 436 #define tpacpi_disclose_usertask(what, format, arg...) \ 437 do { \ 438 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 439 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 440 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 441 what, task_tgid_vnr(current), ## arg); \ 442 } \ 443 } while (0) 444 445 /* 446 * Quirk handling helpers 447 * 448 * ThinkPad IDs and versions seen in the field so far are 449 * two or three characters from the set [0-9A-Z], i.e. base 36. 450 * 451 * We use values well outside that range as specials. 452 */ 453 454 #define TPACPI_MATCH_ANY 0xffffffffU 455 #define TPACPI_MATCH_ANY_VERSION 0xffffU 456 #define TPACPI_MATCH_UNKNOWN 0U 457 458 /* TPID('1', 'Y') == 0x3159 */ 459 #define TPID(__c1, __c2) (((__c1) << 8) | (__c2)) 460 #define TPID3(__c1, __c2, __c3) (((__c1) << 16) | ((__c2) << 8) | (__c3)) 461 #define TPVER TPID 462 463 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 464 { .vendor = PCI_VENDOR_ID_IBM, \ 465 .bios = TPID(__id1, __id2), \ 466 .ec = TPACPI_MATCH_ANY, \ 467 .quirks = (__quirk) } 468 469 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 470 { .vendor = PCI_VENDOR_ID_LENOVO, \ 471 .bios = TPID(__id1, __id2), \ 472 .ec = TPACPI_MATCH_ANY, \ 473 .quirks = (__quirk) } 474 475 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \ 476 { .vendor = PCI_VENDOR_ID_LENOVO, \ 477 .bios = TPID3(__id1, __id2, __id3), \ 478 .ec = TPACPI_MATCH_ANY, \ 479 .quirks = (__quirk) } 480 481 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 482 { .vendor = PCI_VENDOR_ID_LENOVO, \ 483 .bios = TPACPI_MATCH_ANY, \ 484 .ec = TPID(__id1, __id2), \ 485 .quirks = (__quirk) } 486 487 struct tpacpi_quirk { 488 unsigned int vendor; 489 u32 bios; 490 u32 ec; 491 unsigned long quirks; 492 }; 493 494 /** 495 * tpacpi_check_quirks() - search BIOS/EC version on a list 496 * @qlist: array of &struct tpacpi_quirk 497 * @qlist_size: number of elements in @qlist 498 * 499 * Iterates over a quirks list until one is found that matches the 500 * ThinkPad's vendor, BIOS and EC model. 501 * 502 * Returns 0 if nothing matches, otherwise returns the quirks field of 503 * the matching &struct tpacpi_quirk entry. 504 * 505 * The match criteria is: vendor, ec and bios much match. 506 */ 507 static unsigned long __init tpacpi_check_quirks( 508 const struct tpacpi_quirk *qlist, 509 unsigned int qlist_size) 510 { 511 while (qlist_size) { 512 if ((qlist->vendor == thinkpad_id.vendor || 513 qlist->vendor == TPACPI_MATCH_ANY) && 514 (qlist->bios == thinkpad_id.bios_model || 515 qlist->bios == TPACPI_MATCH_ANY) && 516 (qlist->ec == thinkpad_id.ec_model || 517 qlist->ec == TPACPI_MATCH_ANY)) 518 return qlist->quirks; 519 520 qlist_size--; 521 qlist++; 522 } 523 return 0; 524 } 525 526 static inline bool __pure __init tpacpi_is_lenovo(void) 527 { 528 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 529 } 530 531 static inline bool __pure __init tpacpi_is_ibm(void) 532 { 533 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 534 } 535 536 /**************************************************************************** 537 **************************************************************************** 538 * 539 * ACPI Helpers and device model 540 * 541 **************************************************************************** 542 ****************************************************************************/ 543 544 /************************************************************************* 545 * ACPI basic handles 546 */ 547 548 static acpi_handle root_handle; 549 static acpi_handle ec_handle; 550 551 #define TPACPI_HANDLE(object, parent, paths...) \ 552 static acpi_handle object##_handle; \ 553 static const acpi_handle * const object##_parent __initconst = \ 554 &parent##_handle; \ 555 static char *object##_paths[] __initdata = { paths } 556 557 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 558 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 559 560 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 561 /* T4x, X31, X40 */ 562 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 563 "\\CMS", /* R40, R40e */ 564 ); /* all others */ 565 566 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 567 "^HKEY", /* R30, R31 */ 568 "HKEY", /* all others */ 569 ); /* 570 */ 570 571 /************************************************************************* 572 * ACPI helpers 573 */ 574 575 static int acpi_evalf(acpi_handle handle, 576 int *res, char *method, char *fmt, ...) 577 { 578 char *fmt0 = fmt; 579 struct acpi_object_list params; 580 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 581 struct acpi_buffer result, *resultp; 582 union acpi_object out_obj; 583 acpi_status status; 584 va_list ap; 585 char res_type; 586 int success; 587 int quiet; 588 589 if (!*fmt) { 590 pr_err("acpi_evalf() called with empty format\n"); 591 return 0; 592 } 593 594 if (*fmt == 'q') { 595 quiet = 1; 596 fmt++; 597 } else 598 quiet = 0; 599 600 res_type = *(fmt++); 601 602 params.count = 0; 603 params.pointer = &in_objs[0]; 604 605 va_start(ap, fmt); 606 while (*fmt) { 607 char c = *(fmt++); 608 switch (c) { 609 case 'd': /* int */ 610 in_objs[params.count].integer.value = va_arg(ap, int); 611 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 612 break; 613 /* add more types as needed */ 614 default: 615 pr_err("acpi_evalf() called with invalid format character '%c'\n", 616 c); 617 va_end(ap); 618 return 0; 619 } 620 } 621 va_end(ap); 622 623 if (res_type != 'v') { 624 result.length = sizeof(out_obj); 625 result.pointer = &out_obj; 626 resultp = &result; 627 } else 628 resultp = NULL; 629 630 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 631 632 switch (res_type) { 633 case 'd': /* int */ 634 success = (status == AE_OK && 635 out_obj.type == ACPI_TYPE_INTEGER); 636 if (success && res) 637 *res = out_obj.integer.value; 638 break; 639 case 'v': /* void */ 640 success = status == AE_OK; 641 break; 642 /* add more types as needed */ 643 default: 644 pr_err("acpi_evalf() called with invalid format character '%c'\n", 645 res_type); 646 return 0; 647 } 648 649 if (!success && !quiet) 650 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 651 method, fmt0, acpi_format_exception(status)); 652 653 return success; 654 } 655 656 static int acpi_ec_read(int i, u8 *p) 657 { 658 int v; 659 660 if (ecrd_handle) { 661 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 662 return 0; 663 *p = v; 664 } else { 665 if (ec_read(i, p) < 0) 666 return 0; 667 } 668 669 return 1; 670 } 671 672 static int acpi_ec_write(int i, u8 v) 673 { 674 if (ecwr_handle) { 675 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 676 return 0; 677 } else { 678 if (ec_write(i, v) < 0) 679 return 0; 680 } 681 682 return 1; 683 } 684 685 static int issue_thinkpad_cmos_command(int cmos_cmd) 686 { 687 if (!cmos_handle) 688 return -ENXIO; 689 690 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 691 return -EIO; 692 693 return 0; 694 } 695 696 /************************************************************************* 697 * ACPI device model 698 */ 699 700 #define TPACPI_ACPIHANDLE_INIT(object) \ 701 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 702 object##_paths, ARRAY_SIZE(object##_paths)) 703 704 static void __init drv_acpi_handle_init(const char *name, 705 acpi_handle *handle, const acpi_handle parent, 706 char **paths, const int num_paths) 707 { 708 int i; 709 acpi_status status; 710 711 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 712 name); 713 714 for (i = 0; i < num_paths; i++) { 715 status = acpi_get_handle(parent, paths[i], handle); 716 if (ACPI_SUCCESS(status)) { 717 dbg_printk(TPACPI_DBG_INIT, 718 "Found ACPI handle %s for %s\n", 719 paths[i], name); 720 return; 721 } 722 } 723 724 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 725 name); 726 *handle = NULL; 727 } 728 729 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 730 u32 level, void *context, void **return_value) 731 { 732 struct acpi_device *dev; 733 if (!strcmp(context, "video")) { 734 if (acpi_bus_get_device(handle, &dev)) 735 return AE_OK; 736 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 737 return AE_OK; 738 } 739 740 *(acpi_handle *)return_value = handle; 741 742 return AE_CTRL_TERMINATE; 743 } 744 745 static void __init tpacpi_acpi_handle_locate(const char *name, 746 const char *hid, 747 acpi_handle *handle) 748 { 749 acpi_status status; 750 acpi_handle device_found; 751 752 BUG_ON(!name || !handle); 753 vdbg_printk(TPACPI_DBG_INIT, 754 "trying to locate ACPI handle for %s, using HID %s\n", 755 name, hid ? hid : "NULL"); 756 757 memset(&device_found, 0, sizeof(device_found)); 758 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 759 (void *)name, &device_found); 760 761 *handle = NULL; 762 763 if (ACPI_SUCCESS(status)) { 764 *handle = device_found; 765 dbg_printk(TPACPI_DBG_INIT, 766 "Found ACPI handle for %s\n", name); 767 } else { 768 vdbg_printk(TPACPI_DBG_INIT, 769 "Could not locate an ACPI handle for %s: %s\n", 770 name, acpi_format_exception(status)); 771 } 772 } 773 774 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 775 { 776 struct ibm_struct *ibm = data; 777 778 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 779 return; 780 781 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 782 return; 783 784 ibm->acpi->notify(ibm, event); 785 } 786 787 static int __init setup_acpi_notify(struct ibm_struct *ibm) 788 { 789 acpi_status status; 790 int rc; 791 792 BUG_ON(!ibm->acpi); 793 794 if (!*ibm->acpi->handle) 795 return 0; 796 797 vdbg_printk(TPACPI_DBG_INIT, 798 "setting up ACPI notify for %s\n", ibm->name); 799 800 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 801 if (rc < 0) { 802 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 803 return -ENODEV; 804 } 805 806 ibm->acpi->device->driver_data = ibm; 807 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 808 TPACPI_ACPI_EVENT_PREFIX, 809 ibm->name); 810 811 status = acpi_install_notify_handler(*ibm->acpi->handle, 812 ibm->acpi->type, dispatch_acpi_notify, ibm); 813 if (ACPI_FAILURE(status)) { 814 if (status == AE_ALREADY_EXISTS) { 815 pr_notice("another device driver is already handling %s events\n", 816 ibm->name); 817 } else { 818 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 819 ibm->name, acpi_format_exception(status)); 820 } 821 return -ENODEV; 822 } 823 ibm->flags.acpi_notify_installed = 1; 824 return 0; 825 } 826 827 static int __init tpacpi_device_add(struct acpi_device *device) 828 { 829 return 0; 830 } 831 832 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 833 { 834 int rc; 835 836 dbg_printk(TPACPI_DBG_INIT, 837 "registering %s as an ACPI driver\n", ibm->name); 838 839 BUG_ON(!ibm->acpi); 840 841 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 842 if (!ibm->acpi->driver) { 843 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 844 return -ENOMEM; 845 } 846 847 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 848 ibm->acpi->driver->ids = ibm->acpi->hid; 849 850 ibm->acpi->driver->ops.add = &tpacpi_device_add; 851 852 rc = acpi_bus_register_driver(ibm->acpi->driver); 853 if (rc < 0) { 854 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 855 ibm->name, rc); 856 kfree(ibm->acpi->driver); 857 ibm->acpi->driver = NULL; 858 } else if (!rc) 859 ibm->flags.acpi_driver_registered = 1; 860 861 return rc; 862 } 863 864 865 /**************************************************************************** 866 **************************************************************************** 867 * 868 * Procfs Helpers 869 * 870 **************************************************************************** 871 ****************************************************************************/ 872 873 static int dispatch_proc_show(struct seq_file *m, void *v) 874 { 875 struct ibm_struct *ibm = m->private; 876 877 if (!ibm || !ibm->read) 878 return -EINVAL; 879 return ibm->read(m); 880 } 881 882 static int dispatch_proc_open(struct inode *inode, struct file *file) 883 { 884 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 885 } 886 887 static ssize_t dispatch_proc_write(struct file *file, 888 const char __user *userbuf, 889 size_t count, loff_t *pos) 890 { 891 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 892 char *kernbuf; 893 int ret; 894 895 if (!ibm || !ibm->write) 896 return -EINVAL; 897 if (count > PAGE_SIZE - 2) 898 return -EINVAL; 899 900 kernbuf = kmalloc(count + 2, GFP_KERNEL); 901 if (!kernbuf) 902 return -ENOMEM; 903 904 if (copy_from_user(kernbuf, userbuf, count)) { 905 kfree(kernbuf); 906 return -EFAULT; 907 } 908 909 kernbuf[count] = 0; 910 strcat(kernbuf, ","); 911 ret = ibm->write(kernbuf); 912 if (ret == 0) 913 ret = count; 914 915 kfree(kernbuf); 916 917 return ret; 918 } 919 920 static const struct file_operations dispatch_proc_fops = { 921 .owner = THIS_MODULE, 922 .open = dispatch_proc_open, 923 .read = seq_read, 924 .llseek = seq_lseek, 925 .release = single_release, 926 .write = dispatch_proc_write, 927 }; 928 929 static char *next_cmd(char **cmds) 930 { 931 char *start = *cmds; 932 char *end; 933 934 while ((end = strchr(start, ',')) && end == start) 935 start = end + 1; 936 937 if (!end) 938 return NULL; 939 940 *end = 0; 941 *cmds = end + 1; 942 return start; 943 } 944 945 946 /**************************************************************************** 947 **************************************************************************** 948 * 949 * Device model: input, hwmon and platform 950 * 951 **************************************************************************** 952 ****************************************************************************/ 953 954 static struct platform_device *tpacpi_pdev; 955 static struct platform_device *tpacpi_sensors_pdev; 956 static struct device *tpacpi_hwmon; 957 static struct input_dev *tpacpi_inputdev; 958 static struct mutex tpacpi_inputdev_send_mutex; 959 static LIST_HEAD(tpacpi_all_drivers); 960 961 #ifdef CONFIG_PM_SLEEP 962 static int tpacpi_suspend_handler(struct device *dev) 963 { 964 struct ibm_struct *ibm, *itmp; 965 966 list_for_each_entry_safe(ibm, itmp, 967 &tpacpi_all_drivers, 968 all_drivers) { 969 if (ibm->suspend) 970 (ibm->suspend)(); 971 } 972 973 return 0; 974 } 975 976 static int tpacpi_resume_handler(struct device *dev) 977 { 978 struct ibm_struct *ibm, *itmp; 979 980 list_for_each_entry_safe(ibm, itmp, 981 &tpacpi_all_drivers, 982 all_drivers) { 983 if (ibm->resume) 984 (ibm->resume)(); 985 } 986 987 return 0; 988 } 989 #endif 990 991 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 992 tpacpi_suspend_handler, tpacpi_resume_handler); 993 994 static void tpacpi_shutdown_handler(struct platform_device *pdev) 995 { 996 struct ibm_struct *ibm, *itmp; 997 998 list_for_each_entry_safe(ibm, itmp, 999 &tpacpi_all_drivers, 1000 all_drivers) { 1001 if (ibm->shutdown) 1002 (ibm->shutdown)(); 1003 } 1004 } 1005 1006 static struct platform_driver tpacpi_pdriver = { 1007 .driver = { 1008 .name = TPACPI_DRVR_NAME, 1009 .pm = &tpacpi_pm, 1010 }, 1011 .shutdown = tpacpi_shutdown_handler, 1012 }; 1013 1014 static struct platform_driver tpacpi_hwmon_pdriver = { 1015 .driver = { 1016 .name = TPACPI_HWMON_DRVR_NAME, 1017 }, 1018 }; 1019 1020 /************************************************************************* 1021 * sysfs support helpers 1022 */ 1023 1024 struct attribute_set { 1025 unsigned int members, max_members; 1026 struct attribute_group group; 1027 }; 1028 1029 struct attribute_set_obj { 1030 struct attribute_set s; 1031 struct attribute *a; 1032 } __attribute__((packed)); 1033 1034 static struct attribute_set *create_attr_set(unsigned int max_members, 1035 const char *name) 1036 { 1037 struct attribute_set_obj *sobj; 1038 1039 if (max_members == 0) 1040 return NULL; 1041 1042 /* Allocates space for implicit NULL at the end too */ 1043 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1044 max_members * sizeof(struct attribute *), 1045 GFP_KERNEL); 1046 if (!sobj) 1047 return NULL; 1048 sobj->s.max_members = max_members; 1049 sobj->s.group.attrs = &sobj->a; 1050 sobj->s.group.name = name; 1051 1052 return &sobj->s; 1053 } 1054 1055 #define destroy_attr_set(_set) \ 1056 kfree(_set); 1057 1058 /* not multi-threaded safe, use it in a single thread per set */ 1059 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1060 { 1061 if (!s || !attr) 1062 return -EINVAL; 1063 1064 if (s->members >= s->max_members) 1065 return -ENOMEM; 1066 1067 s->group.attrs[s->members] = attr; 1068 s->members++; 1069 1070 return 0; 1071 } 1072 1073 static int add_many_to_attr_set(struct attribute_set *s, 1074 struct attribute **attr, 1075 unsigned int count) 1076 { 1077 int i, res; 1078 1079 for (i = 0; i < count; i++) { 1080 res = add_to_attr_set(s, attr[i]); 1081 if (res) 1082 return res; 1083 } 1084 1085 return 0; 1086 } 1087 1088 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1089 { 1090 sysfs_remove_group(kobj, &s->group); 1091 destroy_attr_set(s); 1092 } 1093 1094 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1095 sysfs_create_group(_kobj, &_attr_set->group) 1096 1097 static int parse_strtoul(const char *buf, 1098 unsigned long max, unsigned long *value) 1099 { 1100 char *endp; 1101 1102 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1103 endp = skip_spaces(endp); 1104 if (*endp || *value > max) 1105 return -EINVAL; 1106 1107 return 0; 1108 } 1109 1110 static void tpacpi_disable_brightness_delay(void) 1111 { 1112 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1113 pr_notice("ACPI backlight control delay disabled\n"); 1114 } 1115 1116 static void printk_deprecated_attribute(const char * const what, 1117 const char * const details) 1118 { 1119 tpacpi_log_usertask("deprecated sysfs attribute"); 1120 pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n", 1121 what, details); 1122 } 1123 1124 /************************************************************************* 1125 * rfkill and radio control support helpers 1126 */ 1127 1128 /* 1129 * ThinkPad-ACPI firmware handling model: 1130 * 1131 * WLSW (master wireless switch) is event-driven, and is common to all 1132 * firmware-controlled radios. It cannot be controlled, just monitored, 1133 * as expected. It overrides all radio state in firmware 1134 * 1135 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1136 * (TODO: verify how WLSW interacts with the returned radio state). 1137 * 1138 * The only time there are shadow radio state changes, is when 1139 * masked-off hotkeys are used. 1140 */ 1141 1142 /* 1143 * Internal driver API for radio state: 1144 * 1145 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1146 * bool: true means radio blocked (off) 1147 */ 1148 enum tpacpi_rfkill_state { 1149 TPACPI_RFK_RADIO_OFF = 0, 1150 TPACPI_RFK_RADIO_ON 1151 }; 1152 1153 /* rfkill switches */ 1154 enum tpacpi_rfk_id { 1155 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1156 TPACPI_RFK_WWAN_SW_ID, 1157 TPACPI_RFK_UWB_SW_ID, 1158 TPACPI_RFK_SW_MAX 1159 }; 1160 1161 static const char *tpacpi_rfkill_names[] = { 1162 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1163 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1164 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1165 [TPACPI_RFK_SW_MAX] = NULL 1166 }; 1167 1168 /* ThinkPad-ACPI rfkill subdriver */ 1169 struct tpacpi_rfk { 1170 struct rfkill *rfkill; 1171 enum tpacpi_rfk_id id; 1172 const struct tpacpi_rfk_ops *ops; 1173 }; 1174 1175 struct tpacpi_rfk_ops { 1176 /* firmware interface */ 1177 int (*get_status)(void); 1178 int (*set_status)(const enum tpacpi_rfkill_state); 1179 }; 1180 1181 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1182 1183 /* Query FW and update rfkill sw state for a given rfkill switch */ 1184 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1185 { 1186 int status; 1187 1188 if (!tp_rfk) 1189 return -ENODEV; 1190 1191 status = (tp_rfk->ops->get_status)(); 1192 if (status < 0) 1193 return status; 1194 1195 rfkill_set_sw_state(tp_rfk->rfkill, 1196 (status == TPACPI_RFK_RADIO_OFF)); 1197 1198 return status; 1199 } 1200 1201 /* Query FW and update rfkill sw state for all rfkill switches */ 1202 static void tpacpi_rfk_update_swstate_all(void) 1203 { 1204 unsigned int i; 1205 1206 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1207 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1208 } 1209 1210 /* 1211 * Sync the HW-blocking state of all rfkill switches, 1212 * do notice it causes the rfkill core to schedule uevents 1213 */ 1214 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1215 { 1216 unsigned int i; 1217 struct tpacpi_rfk *tp_rfk; 1218 1219 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1220 tp_rfk = tpacpi_rfkill_switches[i]; 1221 if (tp_rfk) { 1222 if (rfkill_set_hw_state(tp_rfk->rfkill, 1223 blocked)) { 1224 /* ignore -- we track sw block */ 1225 } 1226 } 1227 } 1228 } 1229 1230 /* Call to get the WLSW state from the firmware */ 1231 static int hotkey_get_wlsw(void); 1232 1233 /* Call to query WLSW state and update all rfkill switches */ 1234 static bool tpacpi_rfk_check_hwblock_state(void) 1235 { 1236 int res = hotkey_get_wlsw(); 1237 int hw_blocked; 1238 1239 /* When unknown or unsupported, we have to assume it is unblocked */ 1240 if (res < 0) 1241 return false; 1242 1243 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1244 tpacpi_rfk_update_hwblock_state(hw_blocked); 1245 1246 return hw_blocked; 1247 } 1248 1249 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1250 { 1251 struct tpacpi_rfk *tp_rfk = data; 1252 int res; 1253 1254 dbg_printk(TPACPI_DBG_RFKILL, 1255 "request to change radio state to %s\n", 1256 blocked ? "blocked" : "unblocked"); 1257 1258 /* try to set radio state */ 1259 res = (tp_rfk->ops->set_status)(blocked ? 1260 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1261 1262 /* and update the rfkill core with whatever the FW really did */ 1263 tpacpi_rfk_update_swstate(tp_rfk); 1264 1265 return (res < 0) ? res : 0; 1266 } 1267 1268 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1269 .set_block = tpacpi_rfk_hook_set_block, 1270 }; 1271 1272 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1273 const struct tpacpi_rfk_ops *tp_rfkops, 1274 const enum rfkill_type rfktype, 1275 const char *name, 1276 const bool set_default) 1277 { 1278 struct tpacpi_rfk *atp_rfk; 1279 int res; 1280 bool sw_state = false; 1281 bool hw_state; 1282 int sw_status; 1283 1284 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1285 1286 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1287 if (atp_rfk) 1288 atp_rfk->rfkill = rfkill_alloc(name, 1289 &tpacpi_pdev->dev, 1290 rfktype, 1291 &tpacpi_rfk_rfkill_ops, 1292 atp_rfk); 1293 if (!atp_rfk || !atp_rfk->rfkill) { 1294 pr_err("failed to allocate memory for rfkill class\n"); 1295 kfree(atp_rfk); 1296 return -ENOMEM; 1297 } 1298 1299 atp_rfk->id = id; 1300 atp_rfk->ops = tp_rfkops; 1301 1302 sw_status = (tp_rfkops->get_status)(); 1303 if (sw_status < 0) { 1304 pr_err("failed to read initial state for %s, error %d\n", 1305 name, sw_status); 1306 } else { 1307 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1308 if (set_default) { 1309 /* try to keep the initial state, since we ask the 1310 * firmware to preserve it across S5 in NVRAM */ 1311 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1312 } 1313 } 1314 hw_state = tpacpi_rfk_check_hwblock_state(); 1315 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1316 1317 res = rfkill_register(atp_rfk->rfkill); 1318 if (res < 0) { 1319 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1320 rfkill_destroy(atp_rfk->rfkill); 1321 kfree(atp_rfk); 1322 return res; 1323 } 1324 1325 tpacpi_rfkill_switches[id] = atp_rfk; 1326 1327 pr_info("rfkill switch %s: radio is %sblocked\n", 1328 name, (sw_state || hw_state) ? "" : "un"); 1329 return 0; 1330 } 1331 1332 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1333 { 1334 struct tpacpi_rfk *tp_rfk; 1335 1336 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1337 1338 tp_rfk = tpacpi_rfkill_switches[id]; 1339 if (tp_rfk) { 1340 rfkill_unregister(tp_rfk->rfkill); 1341 rfkill_destroy(tp_rfk->rfkill); 1342 tpacpi_rfkill_switches[id] = NULL; 1343 kfree(tp_rfk); 1344 } 1345 } 1346 1347 static void printk_deprecated_rfkill_attribute(const char * const what) 1348 { 1349 printk_deprecated_attribute(what, 1350 "Please switch to generic rfkill before year 2010"); 1351 } 1352 1353 /* sysfs <radio> enable ------------------------------------------------ */ 1354 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1355 struct device_attribute *attr, 1356 char *buf) 1357 { 1358 int status; 1359 1360 printk_deprecated_rfkill_attribute(attr->attr.name); 1361 1362 /* This is in the ABI... */ 1363 if (tpacpi_rfk_check_hwblock_state()) { 1364 status = TPACPI_RFK_RADIO_OFF; 1365 } else { 1366 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1367 if (status < 0) 1368 return status; 1369 } 1370 1371 return snprintf(buf, PAGE_SIZE, "%d\n", 1372 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1373 } 1374 1375 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1376 struct device_attribute *attr, 1377 const char *buf, size_t count) 1378 { 1379 unsigned long t; 1380 int res; 1381 1382 printk_deprecated_rfkill_attribute(attr->attr.name); 1383 1384 if (parse_strtoul(buf, 1, &t)) 1385 return -EINVAL; 1386 1387 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1388 1389 /* This is in the ABI... */ 1390 if (tpacpi_rfk_check_hwblock_state() && !!t) 1391 return -EPERM; 1392 1393 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1394 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1395 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1396 1397 return (res < 0) ? res : count; 1398 } 1399 1400 /* procfs -------------------------------------------------------------- */ 1401 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1402 { 1403 if (id >= TPACPI_RFK_SW_MAX) 1404 seq_printf(m, "status:\t\tnot supported\n"); 1405 else { 1406 int status; 1407 1408 /* This is in the ABI... */ 1409 if (tpacpi_rfk_check_hwblock_state()) { 1410 status = TPACPI_RFK_RADIO_OFF; 1411 } else { 1412 status = tpacpi_rfk_update_swstate( 1413 tpacpi_rfkill_switches[id]); 1414 if (status < 0) 1415 return status; 1416 } 1417 1418 seq_printf(m, "status:\t\t%s\n", 1419 (status == TPACPI_RFK_RADIO_ON) ? 1420 "enabled" : "disabled"); 1421 seq_printf(m, "commands:\tenable, disable\n"); 1422 } 1423 1424 return 0; 1425 } 1426 1427 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1428 { 1429 char *cmd; 1430 int status = -1; 1431 int res = 0; 1432 1433 if (id >= TPACPI_RFK_SW_MAX) 1434 return -ENODEV; 1435 1436 while ((cmd = next_cmd(&buf))) { 1437 if (strlencmp(cmd, "enable") == 0) 1438 status = TPACPI_RFK_RADIO_ON; 1439 else if (strlencmp(cmd, "disable") == 0) 1440 status = TPACPI_RFK_RADIO_OFF; 1441 else 1442 return -EINVAL; 1443 } 1444 1445 if (status != -1) { 1446 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1447 (status == TPACPI_RFK_RADIO_ON) ? 1448 "enable" : "disable", 1449 tpacpi_rfkill_names[id]); 1450 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1451 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1452 } 1453 1454 return res; 1455 } 1456 1457 /************************************************************************* 1458 * thinkpad-acpi driver attributes 1459 */ 1460 1461 /* interface_version --------------------------------------------------- */ 1462 static ssize_t interface_version_show(struct device_driver *drv, char *buf) 1463 { 1464 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1465 } 1466 static DRIVER_ATTR_RO(interface_version); 1467 1468 /* debug_level --------------------------------------------------------- */ 1469 static ssize_t debug_level_show(struct device_driver *drv, char *buf) 1470 { 1471 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1472 } 1473 1474 static ssize_t debug_level_store(struct device_driver *drv, const char *buf, 1475 size_t count) 1476 { 1477 unsigned long t; 1478 1479 if (parse_strtoul(buf, 0xffff, &t)) 1480 return -EINVAL; 1481 1482 dbg_level = t; 1483 1484 return count; 1485 } 1486 static DRIVER_ATTR_RW(debug_level); 1487 1488 /* version ------------------------------------------------------------- */ 1489 static ssize_t version_show(struct device_driver *drv, char *buf) 1490 { 1491 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1492 TPACPI_DESC, TPACPI_VERSION); 1493 } 1494 static DRIVER_ATTR_RO(version); 1495 1496 /* --------------------------------------------------------------------- */ 1497 1498 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1499 1500 /* wlsw_emulstate ------------------------------------------------------ */ 1501 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf) 1502 { 1503 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1504 } 1505 1506 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf, 1507 size_t count) 1508 { 1509 unsigned long t; 1510 1511 if (parse_strtoul(buf, 1, &t)) 1512 return -EINVAL; 1513 1514 if (tpacpi_wlsw_emulstate != !!t) { 1515 tpacpi_wlsw_emulstate = !!t; 1516 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1517 } 1518 1519 return count; 1520 } 1521 static DRIVER_ATTR_RW(wlsw_emulstate); 1522 1523 /* bluetooth_emulstate ------------------------------------------------- */ 1524 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf) 1525 { 1526 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1527 } 1528 1529 static ssize_t bluetooth_emulstate_store(struct device_driver *drv, 1530 const char *buf, size_t count) 1531 { 1532 unsigned long t; 1533 1534 if (parse_strtoul(buf, 1, &t)) 1535 return -EINVAL; 1536 1537 tpacpi_bluetooth_emulstate = !!t; 1538 1539 return count; 1540 } 1541 static DRIVER_ATTR_RW(bluetooth_emulstate); 1542 1543 /* wwan_emulstate ------------------------------------------------- */ 1544 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf) 1545 { 1546 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1547 } 1548 1549 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf, 1550 size_t count) 1551 { 1552 unsigned long t; 1553 1554 if (parse_strtoul(buf, 1, &t)) 1555 return -EINVAL; 1556 1557 tpacpi_wwan_emulstate = !!t; 1558 1559 return count; 1560 } 1561 static DRIVER_ATTR_RW(wwan_emulstate); 1562 1563 /* uwb_emulstate ------------------------------------------------- */ 1564 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf) 1565 { 1566 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1567 } 1568 1569 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf, 1570 size_t count) 1571 { 1572 unsigned long t; 1573 1574 if (parse_strtoul(buf, 1, &t)) 1575 return -EINVAL; 1576 1577 tpacpi_uwb_emulstate = !!t; 1578 1579 return count; 1580 } 1581 static DRIVER_ATTR_RW(uwb_emulstate); 1582 #endif 1583 1584 /* --------------------------------------------------------------------- */ 1585 1586 static struct driver_attribute *tpacpi_driver_attributes[] = { 1587 &driver_attr_debug_level, &driver_attr_version, 1588 &driver_attr_interface_version, 1589 }; 1590 1591 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1592 { 1593 int i, res; 1594 1595 i = 0; 1596 res = 0; 1597 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1598 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1599 i++; 1600 } 1601 1602 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1603 if (!res && dbg_wlswemul) 1604 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1605 if (!res && dbg_bluetoothemul) 1606 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1607 if (!res && dbg_wwanemul) 1608 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1609 if (!res && dbg_uwbemul) 1610 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1611 #endif 1612 1613 return res; 1614 } 1615 1616 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1617 { 1618 int i; 1619 1620 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1621 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1622 1623 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1624 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1625 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1626 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1627 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1628 #endif 1629 } 1630 1631 /************************************************************************* 1632 * Firmware Data 1633 */ 1634 1635 /* 1636 * Table of recommended minimum BIOS versions 1637 * 1638 * Reasons for listing: 1639 * 1. Stable BIOS, listed because the unknown amount of 1640 * bugs and bad ACPI behaviour on older versions 1641 * 1642 * 2. BIOS or EC fw with known bugs that trigger on Linux 1643 * 1644 * 3. BIOS with known reduced functionality in older versions 1645 * 1646 * We recommend the latest BIOS and EC version. 1647 * We only support the latest BIOS and EC fw version as a rule. 1648 * 1649 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1650 * Information from users in ThinkWiki 1651 * 1652 * WARNING: we use this table also to detect that the machine is 1653 * a ThinkPad in some cases, so don't remove entries lightly. 1654 */ 1655 1656 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1657 { .vendor = (__v), \ 1658 .bios = TPID(__id1, __id2), \ 1659 .ec = TPACPI_MATCH_ANY, \ 1660 .quirks = TPACPI_MATCH_ANY_VERSION << 16 \ 1661 | TPVER(__bv1, __bv2) } 1662 1663 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1664 __eid, __ev1, __ev2) \ 1665 { .vendor = (__v), \ 1666 .bios = TPID(__bid1, __bid2), \ 1667 .ec = __eid, \ 1668 .quirks = TPVER(__ev1, __ev2) << 16 \ 1669 | TPVER(__bv1, __bv2) } 1670 1671 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1672 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1673 1674 /* Outdated IBM BIOSes often lack the EC id string */ 1675 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1676 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1677 __bv1, __bv2, TPID(__id1, __id2), \ 1678 __ev1, __ev2), \ 1679 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1680 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1681 __ev1, __ev2) 1682 1683 /* Outdated IBM BIOSes often lack the EC id string */ 1684 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1685 __eid1, __eid2, __ev1, __ev2) \ 1686 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1687 __bv1, __bv2, TPID(__eid1, __eid2), \ 1688 __ev1, __ev2), \ 1689 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1690 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1691 __ev1, __ev2) 1692 1693 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1694 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1695 1696 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1697 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1698 __bv1, __bv2, TPID(__id1, __id2), \ 1699 __ev1, __ev2) 1700 1701 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1702 __eid1, __eid2, __ev1, __ev2) \ 1703 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1704 __bv1, __bv2, TPID(__eid1, __eid2), \ 1705 __ev1, __ev2) 1706 1707 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1708 /* Numeric models ------------------ */ 1709 /* FW MODEL BIOS VERS */ 1710 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1711 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1712 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1713 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1714 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1715 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1716 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1717 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1718 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1719 1720 /* A-series ------------------------- */ 1721 /* FW MODEL BIOS VERS EC VERS */ 1722 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1723 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1724 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1725 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1726 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1727 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1728 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1729 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1730 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1731 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1732 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1733 1734 /* G-series ------------------------- */ 1735 /* FW MODEL BIOS VERS */ 1736 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1737 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1738 1739 /* R-series, T-series --------------- */ 1740 /* FW MODEL BIOS VERS EC VERS */ 1741 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1742 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1743 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1744 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1745 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1746 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1747 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1748 T40/p, T41/p, T42/p (1) */ 1749 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1750 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1751 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1752 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1753 1754 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1755 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1756 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1757 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1758 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1759 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1760 1761 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1762 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1763 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1764 1765 /* BIOS FW BIOS VERS EC FW EC VERS */ 1766 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1767 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1768 1769 /* X-series ------------------------- */ 1770 /* FW MODEL BIOS VERS EC VERS */ 1771 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1772 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1773 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1774 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1775 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1776 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1777 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1778 1779 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1780 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1781 1782 /* (0) - older versions lack DMI EC fw string and functionality */ 1783 /* (1) - older versions known to lack functionality */ 1784 }; 1785 1786 #undef TPV_QL1 1787 #undef TPV_QL0 1788 #undef TPV_QI2 1789 #undef TPV_QI1 1790 #undef TPV_QI0 1791 #undef TPV_Q_X 1792 #undef TPV_Q 1793 1794 static void __init tpacpi_check_outdated_fw(void) 1795 { 1796 unsigned long fwvers; 1797 u16 ec_version, bios_version; 1798 1799 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1800 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1801 1802 if (!fwvers) 1803 return; 1804 1805 bios_version = fwvers & 0xffffU; 1806 ec_version = (fwvers >> 16) & 0xffffU; 1807 1808 /* note that unknown versions are set to 0x0000 and we use that */ 1809 if ((bios_version > thinkpad_id.bios_release) || 1810 (ec_version > thinkpad_id.ec_release && 1811 ec_version != TPACPI_MATCH_ANY_VERSION)) { 1812 /* 1813 * The changelogs would let us track down the exact 1814 * reason, but it is just too much of a pain to track 1815 * it. We only list BIOSes that are either really 1816 * broken, or really stable to begin with, so it is 1817 * best if the user upgrades the firmware anyway. 1818 */ 1819 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1820 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n"); 1821 } 1822 } 1823 1824 static bool __init tpacpi_is_fw_known(void) 1825 { 1826 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1827 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1828 } 1829 1830 /**************************************************************************** 1831 **************************************************************************** 1832 * 1833 * Subdrivers 1834 * 1835 **************************************************************************** 1836 ****************************************************************************/ 1837 1838 /************************************************************************* 1839 * thinkpad-acpi metadata subdriver 1840 */ 1841 1842 static int thinkpad_acpi_driver_read(struct seq_file *m) 1843 { 1844 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1845 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1846 return 0; 1847 } 1848 1849 static struct ibm_struct thinkpad_acpi_driver_data = { 1850 .name = "driver", 1851 .read = thinkpad_acpi_driver_read, 1852 }; 1853 1854 /************************************************************************* 1855 * Hotkey subdriver 1856 */ 1857 1858 /* 1859 * ThinkPad firmware event model 1860 * 1861 * The ThinkPad firmware has two main event interfaces: normal ACPI 1862 * notifications (which follow the ACPI standard), and a private event 1863 * interface. 1864 * 1865 * The private event interface also issues events for the hotkeys. As 1866 * the driver gained features, the event handling code ended up being 1867 * built around the hotkey subdriver. This will need to be refactored 1868 * to a more formal event API eventually. 1869 * 1870 * Some "hotkeys" are actually supposed to be used as event reports, 1871 * such as "brightness has changed", "volume has changed", depending on 1872 * the ThinkPad model and how the firmware is operating. 1873 * 1874 * Unlike other classes, hotkey-class events have mask/unmask control on 1875 * non-ancient firmware. However, how it behaves changes a lot with the 1876 * firmware model and version. 1877 */ 1878 1879 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1880 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1881 TP_ACPI_HOTKEYSCAN_FNF2, 1882 TP_ACPI_HOTKEYSCAN_FNF3, 1883 TP_ACPI_HOTKEYSCAN_FNF4, 1884 TP_ACPI_HOTKEYSCAN_FNF5, 1885 TP_ACPI_HOTKEYSCAN_FNF6, 1886 TP_ACPI_HOTKEYSCAN_FNF7, 1887 TP_ACPI_HOTKEYSCAN_FNF8, 1888 TP_ACPI_HOTKEYSCAN_FNF9, 1889 TP_ACPI_HOTKEYSCAN_FNF10, 1890 TP_ACPI_HOTKEYSCAN_FNF11, 1891 TP_ACPI_HOTKEYSCAN_FNF12, 1892 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1893 TP_ACPI_HOTKEYSCAN_FNINSERT, 1894 TP_ACPI_HOTKEYSCAN_FNDELETE, 1895 TP_ACPI_HOTKEYSCAN_FNHOME, 1896 TP_ACPI_HOTKEYSCAN_FNEND, 1897 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1898 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1899 TP_ACPI_HOTKEYSCAN_FNSPACE, 1900 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1901 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1902 TP_ACPI_HOTKEYSCAN_MUTE, 1903 TP_ACPI_HOTKEYSCAN_THINKPAD, 1904 TP_ACPI_HOTKEYSCAN_UNK1, 1905 TP_ACPI_HOTKEYSCAN_UNK2, 1906 TP_ACPI_HOTKEYSCAN_UNK3, 1907 TP_ACPI_HOTKEYSCAN_UNK4, 1908 TP_ACPI_HOTKEYSCAN_UNK5, 1909 TP_ACPI_HOTKEYSCAN_UNK6, 1910 TP_ACPI_HOTKEYSCAN_UNK7, 1911 TP_ACPI_HOTKEYSCAN_UNK8, 1912 1913 /* Adaptive keyboard keycodes */ 1914 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1915 TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1916 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1917 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1918 TP_ACPI_HOTKEYSCAN_CLOUD, 1919 TP_ACPI_HOTKEYSCAN_UNK9, 1920 TP_ACPI_HOTKEYSCAN_VOICE, 1921 TP_ACPI_HOTKEYSCAN_UNK10, 1922 TP_ACPI_HOTKEYSCAN_GESTURES, 1923 TP_ACPI_HOTKEYSCAN_UNK11, 1924 TP_ACPI_HOTKEYSCAN_UNK12, 1925 TP_ACPI_HOTKEYSCAN_UNK13, 1926 TP_ACPI_HOTKEYSCAN_CONFIG, 1927 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1928 TP_ACPI_HOTKEYSCAN_RELOAD, 1929 TP_ACPI_HOTKEYSCAN_BACK, 1930 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1931 TP_ACPI_HOTKEYSCAN_MIC_UP, 1932 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1933 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1934 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1935 1936 /* Lenovo extended keymap, starting at 0x1300 */ 1937 TP_ACPI_HOTKEYSCAN_EXTENDED_START, 1938 /* first new observed key (star, favorites) is 0x1311 */ 1939 TP_ACPI_HOTKEYSCAN_STAR = 69, 1940 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2, 1941 TP_ACPI_HOTKEYSCAN_CALCULATOR, 1942 TP_ACPI_HOTKEYSCAN_BLUETOOTH, 1943 TP_ACPI_HOTKEYSCAN_KEYBOARD, 1944 1945 /* Hotkey keymap size */ 1946 TPACPI_HOTKEY_MAP_LEN 1947 }; 1948 1949 enum { /* Keys/events available through NVRAM polling */ 1950 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1951 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1952 }; 1953 1954 enum { /* Positions of some of the keys in hotkey masks */ 1955 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1956 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1957 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1958 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1959 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1960 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1961 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1962 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1963 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1964 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1965 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1966 }; 1967 1968 enum { /* NVRAM to ACPI HKEY group map */ 1969 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1970 TP_ACPI_HKEY_ZOOM_MASK | 1971 TP_ACPI_HKEY_DISPSWTCH_MASK | 1972 TP_ACPI_HKEY_HIBERNATE_MASK, 1973 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1974 TP_ACPI_HKEY_BRGHTDWN_MASK, 1975 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1976 TP_ACPI_HKEY_VOLDWN_MASK | 1977 TP_ACPI_HKEY_MUTE_MASK, 1978 }; 1979 1980 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1981 struct tp_nvram_state { 1982 u16 thinkpad_toggle:1; 1983 u16 zoom_toggle:1; 1984 u16 display_toggle:1; 1985 u16 thinklight_toggle:1; 1986 u16 hibernate_toggle:1; 1987 u16 displayexp_toggle:1; 1988 u16 display_state:1; 1989 u16 brightness_toggle:1; 1990 u16 volume_toggle:1; 1991 u16 mute:1; 1992 1993 u8 brightness_level; 1994 u8 volume_level; 1995 }; 1996 1997 /* kthread for the hotkey poller */ 1998 static struct task_struct *tpacpi_hotkey_task; 1999 2000 /* 2001 * Acquire mutex to write poller control variables as an 2002 * atomic block. 2003 * 2004 * Increment hotkey_config_change when changing them if you 2005 * want the kthread to forget old state. 2006 * 2007 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2008 */ 2009 static struct mutex hotkey_thread_data_mutex; 2010 static unsigned int hotkey_config_change; 2011 2012 /* 2013 * hotkey poller control variables 2014 * 2015 * Must be atomic or readers will also need to acquire mutex 2016 * 2017 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2018 * should be used only when the changes need to be taken as 2019 * a block, OR when one needs to force the kthread to forget 2020 * old state. 2021 */ 2022 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2023 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2024 2025 #define HOTKEY_CONFIG_CRITICAL_START \ 2026 do { \ 2027 mutex_lock(&hotkey_thread_data_mutex); \ 2028 hotkey_config_change++; \ 2029 } while (0); 2030 #define HOTKEY_CONFIG_CRITICAL_END \ 2031 mutex_unlock(&hotkey_thread_data_mutex); 2032 2033 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2034 2035 #define hotkey_source_mask 0U 2036 #define HOTKEY_CONFIG_CRITICAL_START 2037 #define HOTKEY_CONFIG_CRITICAL_END 2038 2039 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2040 2041 static struct mutex hotkey_mutex; 2042 2043 static enum { /* Reasons for waking up */ 2044 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2045 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2046 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2047 } hotkey_wakeup_reason; 2048 2049 static int hotkey_autosleep_ack; 2050 2051 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2052 static u32 hotkey_all_mask; /* all events supported in fw */ 2053 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */ 2054 static u32 hotkey_reserved_mask; /* events better left disabled */ 2055 static u32 hotkey_driver_mask; /* events needed by the driver */ 2056 static u32 hotkey_user_mask; /* events visible to userspace */ 2057 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2058 2059 static u16 *hotkey_keycode_map; 2060 2061 static struct attribute_set *hotkey_dev_attributes; 2062 2063 static void tpacpi_driver_event(const unsigned int hkey_event); 2064 static void hotkey_driver_event(const unsigned int scancode); 2065 static void hotkey_poll_setup(const bool may_warn); 2066 2067 /* HKEY.MHKG() return bits */ 2068 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2069 enum { 2070 TP_ACPI_MULTI_MODE_INVALID = 0, 2071 TP_ACPI_MULTI_MODE_UNKNOWN = 1 << 0, 2072 TP_ACPI_MULTI_MODE_LAPTOP = 1 << 1, 2073 TP_ACPI_MULTI_MODE_TABLET = 1 << 2, 2074 TP_ACPI_MULTI_MODE_FLAT = 1 << 3, 2075 TP_ACPI_MULTI_MODE_STAND = 1 << 4, 2076 TP_ACPI_MULTI_MODE_TENT = 1 << 5, 2077 TP_ACPI_MULTI_MODE_STAND_TENT = 1 << 6, 2078 }; 2079 2080 enum { 2081 /* The following modes are considered tablet mode for the purpose of 2082 * reporting the status to userspace. i.e. in all these modes it makes 2083 * sense to disable the laptop input devices such as touchpad and 2084 * keyboard. 2085 */ 2086 TP_ACPI_MULTI_MODE_TABLET_LIKE = TP_ACPI_MULTI_MODE_TABLET | 2087 TP_ACPI_MULTI_MODE_STAND | 2088 TP_ACPI_MULTI_MODE_TENT | 2089 TP_ACPI_MULTI_MODE_STAND_TENT, 2090 }; 2091 2092 static int hotkey_get_wlsw(void) 2093 { 2094 int status; 2095 2096 if (!tp_features.hotkey_wlsw) 2097 return -ENODEV; 2098 2099 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2100 if (dbg_wlswemul) 2101 return (tpacpi_wlsw_emulstate) ? 2102 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2103 #endif 2104 2105 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2106 return -EIO; 2107 2108 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2109 } 2110 2111 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode) 2112 { 2113 int type = (s >> 16) & 0xffff; 2114 int value = s & 0xffff; 2115 int mode = TP_ACPI_MULTI_MODE_INVALID; 2116 int valid_modes = 0; 2117 2118 if (has_tablet_mode) 2119 *has_tablet_mode = 0; 2120 2121 switch (type) { 2122 case 1: 2123 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2124 TP_ACPI_MULTI_MODE_TABLET | 2125 TP_ACPI_MULTI_MODE_STAND_TENT; 2126 break; 2127 case 2: 2128 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2129 TP_ACPI_MULTI_MODE_FLAT | 2130 TP_ACPI_MULTI_MODE_TABLET | 2131 TP_ACPI_MULTI_MODE_STAND | 2132 TP_ACPI_MULTI_MODE_TENT; 2133 break; 2134 case 3: 2135 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2136 TP_ACPI_MULTI_MODE_FLAT; 2137 break; 2138 case 4: 2139 case 5: 2140 /* In mode 4, FLAT is not specified as a valid mode. However, 2141 * it can be seen at least on the X1 Yoga 2nd Generation. 2142 */ 2143 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2144 TP_ACPI_MULTI_MODE_FLAT | 2145 TP_ACPI_MULTI_MODE_TABLET | 2146 TP_ACPI_MULTI_MODE_STAND | 2147 TP_ACPI_MULTI_MODE_TENT; 2148 break; 2149 default: 2150 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n", 2151 type, value, TPACPI_MAIL); 2152 return 0; 2153 } 2154 2155 if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE)) 2156 *has_tablet_mode = 1; 2157 2158 switch (value) { 2159 case 1: 2160 mode = TP_ACPI_MULTI_MODE_LAPTOP; 2161 break; 2162 case 2: 2163 mode = TP_ACPI_MULTI_MODE_FLAT; 2164 break; 2165 case 3: 2166 mode = TP_ACPI_MULTI_MODE_TABLET; 2167 break; 2168 case 4: 2169 if (type == 1) 2170 mode = TP_ACPI_MULTI_MODE_STAND_TENT; 2171 else 2172 mode = TP_ACPI_MULTI_MODE_STAND; 2173 break; 2174 case 5: 2175 mode = TP_ACPI_MULTI_MODE_TENT; 2176 break; 2177 default: 2178 if (type == 5 && value == 0xffff) { 2179 pr_warn("Multi mode status is undetected, assuming laptop\n"); 2180 return 0; 2181 } 2182 } 2183 2184 if (!(mode & valid_modes)) { 2185 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n", 2186 value, type, TPACPI_MAIL); 2187 return 0; 2188 } 2189 2190 return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE); 2191 } 2192 2193 static int hotkey_get_tablet_mode(int *status) 2194 { 2195 int s; 2196 2197 switch (tp_features.hotkey_tablet) { 2198 case TP_HOTKEY_TABLET_USES_MHKG: 2199 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2200 return -EIO; 2201 2202 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2203 break; 2204 case TP_HOTKEY_TABLET_USES_GMMS: 2205 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0)) 2206 return -EIO; 2207 2208 *status = hotkey_gmms_get_tablet_mode(s, NULL); 2209 break; 2210 default: 2211 break; 2212 } 2213 2214 return 0; 2215 } 2216 2217 /* 2218 * Reads current event mask from firmware, and updates 2219 * hotkey_acpi_mask accordingly. Also resets any bits 2220 * from hotkey_user_mask that are unavailable to be 2221 * delivered (shadow requirement of the userspace ABI). 2222 * 2223 * Call with hotkey_mutex held 2224 */ 2225 static int hotkey_mask_get(void) 2226 { 2227 if (tp_features.hotkey_mask) { 2228 u32 m = 0; 2229 2230 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2231 return -EIO; 2232 2233 hotkey_acpi_mask = m; 2234 } else { 2235 /* no mask support doesn't mean no event support... */ 2236 hotkey_acpi_mask = hotkey_all_mask; 2237 } 2238 2239 /* sync userspace-visible mask */ 2240 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2241 2242 return 0; 2243 } 2244 2245 static void hotkey_mask_warn_incomplete_mask(void) 2246 { 2247 /* log only what the user can fix... */ 2248 const u32 wantedmask = hotkey_driver_mask & 2249 ~(hotkey_acpi_mask | hotkey_source_mask) & 2250 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2251 2252 if (wantedmask) 2253 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2254 } 2255 2256 /* 2257 * Set the firmware mask when supported 2258 * 2259 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2260 * 2261 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2262 * 2263 * Call with hotkey_mutex held 2264 */ 2265 static int hotkey_mask_set(u32 mask) 2266 { 2267 int i; 2268 int rc = 0; 2269 2270 const u32 fwmask = mask & ~hotkey_source_mask; 2271 2272 if (tp_features.hotkey_mask) { 2273 for (i = 0; i < 32; i++) { 2274 if (!acpi_evalf(hkey_handle, 2275 NULL, "MHKM", "vdd", i + 1, 2276 !!(mask & (1 << i)))) { 2277 rc = -EIO; 2278 break; 2279 } 2280 } 2281 } 2282 2283 /* 2284 * We *must* make an inconditional call to hotkey_mask_get to 2285 * refresh hotkey_acpi_mask and update hotkey_user_mask 2286 * 2287 * Take the opportunity to also log when we cannot _enable_ 2288 * a given event. 2289 */ 2290 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2291 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n", 2292 fwmask, hotkey_acpi_mask); 2293 } 2294 2295 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2296 hotkey_mask_warn_incomplete_mask(); 2297 2298 return rc; 2299 } 2300 2301 /* 2302 * Sets hotkey_user_mask and tries to set the firmware mask 2303 * 2304 * Call with hotkey_mutex held 2305 */ 2306 static int hotkey_user_mask_set(const u32 mask) 2307 { 2308 int rc; 2309 2310 /* Give people a chance to notice they are doing something that 2311 * is bound to go boom on their users sooner or later */ 2312 if (!tp_warned.hotkey_mask_ff && 2313 (mask == 0xffff || mask == 0xffffff || 2314 mask == 0xffffffff)) { 2315 tp_warned.hotkey_mask_ff = 1; 2316 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n", 2317 mask); 2318 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n"); 2319 } 2320 2321 /* Try to enable what the user asked for, plus whatever we need. 2322 * this syncs everything but won't enable bits in hotkey_user_mask */ 2323 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2324 2325 /* Enable the available bits in hotkey_user_mask */ 2326 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2327 2328 return rc; 2329 } 2330 2331 /* 2332 * Sets the driver hotkey mask. 2333 * 2334 * Can be called even if the hotkey subdriver is inactive 2335 */ 2336 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2337 { 2338 int rc; 2339 2340 /* Do the right thing if hotkey_init has not been called yet */ 2341 if (!tp_features.hotkey) { 2342 hotkey_driver_mask = mask; 2343 return 0; 2344 } 2345 2346 mutex_lock(&hotkey_mutex); 2347 2348 HOTKEY_CONFIG_CRITICAL_START 2349 hotkey_driver_mask = mask; 2350 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2351 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2352 #endif 2353 HOTKEY_CONFIG_CRITICAL_END 2354 2355 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2356 ~hotkey_source_mask); 2357 hotkey_poll_setup(true); 2358 2359 mutex_unlock(&hotkey_mutex); 2360 2361 return rc; 2362 } 2363 2364 static int hotkey_status_get(int *status) 2365 { 2366 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2367 return -EIO; 2368 2369 return 0; 2370 } 2371 2372 static int hotkey_status_set(bool enable) 2373 { 2374 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2375 return -EIO; 2376 2377 return 0; 2378 } 2379 2380 static void tpacpi_input_send_tabletsw(void) 2381 { 2382 int state; 2383 2384 if (tp_features.hotkey_tablet && 2385 !hotkey_get_tablet_mode(&state)) { 2386 mutex_lock(&tpacpi_inputdev_send_mutex); 2387 2388 input_report_switch(tpacpi_inputdev, 2389 SW_TABLET_MODE, !!state); 2390 input_sync(tpacpi_inputdev); 2391 2392 mutex_unlock(&tpacpi_inputdev_send_mutex); 2393 } 2394 } 2395 2396 /* Do NOT call without validating scancode first */ 2397 static void tpacpi_input_send_key(const unsigned int scancode) 2398 { 2399 const unsigned int keycode = hotkey_keycode_map[scancode]; 2400 2401 if (keycode != KEY_RESERVED) { 2402 mutex_lock(&tpacpi_inputdev_send_mutex); 2403 2404 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2405 input_report_key(tpacpi_inputdev, keycode, 1); 2406 input_sync(tpacpi_inputdev); 2407 2408 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2409 input_report_key(tpacpi_inputdev, keycode, 0); 2410 input_sync(tpacpi_inputdev); 2411 2412 mutex_unlock(&tpacpi_inputdev_send_mutex); 2413 } 2414 } 2415 2416 /* Do NOT call without validating scancode first */ 2417 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2418 { 2419 hotkey_driver_event(scancode); 2420 if (hotkey_user_mask & (1 << scancode)) 2421 tpacpi_input_send_key(scancode); 2422 } 2423 2424 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2425 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2426 2427 /* Do NOT call without validating scancode first */ 2428 static void tpacpi_hotkey_send_key(unsigned int scancode) 2429 { 2430 tpacpi_input_send_key_masked(scancode); 2431 } 2432 2433 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2434 { 2435 u8 d; 2436 2437 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2438 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2439 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2440 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2441 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2442 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2443 } 2444 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) { 2445 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2446 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2447 } 2448 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2449 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2450 n->displayexp_toggle = 2451 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2452 } 2453 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2454 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2455 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2456 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2457 n->brightness_toggle = 2458 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2459 } 2460 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2461 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2462 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2463 >> TP_NVRAM_POS_LEVEL_VOLUME; 2464 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2465 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2466 } 2467 } 2468 2469 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2470 do { \ 2471 if ((event_mask & (1 << __scancode)) && \ 2472 oldn->__member != newn->__member) \ 2473 tpacpi_hotkey_send_key(__scancode); \ 2474 } while (0) 2475 2476 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2477 do { \ 2478 if (event_mask & (1 << __scancode)) \ 2479 tpacpi_hotkey_send_key(__scancode); \ 2480 } while (0) 2481 2482 static void issue_volchange(const unsigned int oldvol, 2483 const unsigned int newvol, 2484 const u32 event_mask) 2485 { 2486 unsigned int i = oldvol; 2487 2488 while (i > newvol) { 2489 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2490 i--; 2491 } 2492 while (i < newvol) { 2493 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2494 i++; 2495 } 2496 } 2497 2498 static void issue_brightnesschange(const unsigned int oldbrt, 2499 const unsigned int newbrt, 2500 const u32 event_mask) 2501 { 2502 unsigned int i = oldbrt; 2503 2504 while (i > newbrt) { 2505 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2506 i--; 2507 } 2508 while (i < newbrt) { 2509 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2510 i++; 2511 } 2512 } 2513 2514 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2515 struct tp_nvram_state *newn, 2516 const u32 event_mask) 2517 { 2518 2519 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2520 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2521 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2522 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2523 2524 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2525 2526 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2527 2528 /* 2529 * Handle volume 2530 * 2531 * This code is supposed to duplicate the IBM firmware behaviour: 2532 * - Pressing MUTE issues mute hotkey message, even when already mute 2533 * - Pressing Volume up/down issues volume up/down hotkey messages, 2534 * even when already at maximum or minimum volume 2535 * - The act of unmuting issues volume up/down notification, 2536 * depending which key was used to unmute 2537 * 2538 * We are constrained to what the NVRAM can tell us, which is not much 2539 * and certainly not enough if more than one volume hotkey was pressed 2540 * since the last poll cycle. 2541 * 2542 * Just to make our life interesting, some newer Lenovo ThinkPads have 2543 * bugs in the BIOS and may fail to update volume_toggle properly. 2544 */ 2545 if (newn->mute) { 2546 /* muted */ 2547 if (!oldn->mute || 2548 oldn->volume_toggle != newn->volume_toggle || 2549 oldn->volume_level != newn->volume_level) { 2550 /* recently muted, or repeated mute keypress, or 2551 * multiple presses ending in mute */ 2552 issue_volchange(oldn->volume_level, newn->volume_level, 2553 event_mask); 2554 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2555 } 2556 } else { 2557 /* unmute */ 2558 if (oldn->mute) { 2559 /* recently unmuted, issue 'unmute' keypress */ 2560 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2561 } 2562 if (oldn->volume_level != newn->volume_level) { 2563 issue_volchange(oldn->volume_level, newn->volume_level, 2564 event_mask); 2565 } else if (oldn->volume_toggle != newn->volume_toggle) { 2566 /* repeated vol up/down keypress at end of scale ? */ 2567 if (newn->volume_level == 0) 2568 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2569 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2570 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2571 } 2572 } 2573 2574 /* handle brightness */ 2575 if (oldn->brightness_level != newn->brightness_level) { 2576 issue_brightnesschange(oldn->brightness_level, 2577 newn->brightness_level, event_mask); 2578 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2579 /* repeated key presses that didn't change state */ 2580 if (newn->brightness_level == 0) 2581 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2582 else if (newn->brightness_level >= bright_maxlvl 2583 && !tp_features.bright_unkfw) 2584 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2585 } 2586 2587 #undef TPACPI_COMPARE_KEY 2588 #undef TPACPI_MAY_SEND_KEY 2589 } 2590 2591 /* 2592 * Polling driver 2593 * 2594 * We track all events in hotkey_source_mask all the time, since 2595 * most of them are edge-based. We only issue those requested by 2596 * hotkey_user_mask or hotkey_driver_mask, though. 2597 */ 2598 static int hotkey_kthread(void *data) 2599 { 2600 struct tp_nvram_state s[2]; 2601 u32 poll_mask, event_mask; 2602 unsigned int si, so; 2603 unsigned long t; 2604 unsigned int change_detector; 2605 unsigned int poll_freq; 2606 bool was_frozen; 2607 2608 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2609 goto exit; 2610 2611 set_freezable(); 2612 2613 so = 0; 2614 si = 1; 2615 t = 0; 2616 2617 /* Initial state for compares */ 2618 mutex_lock(&hotkey_thread_data_mutex); 2619 change_detector = hotkey_config_change; 2620 poll_mask = hotkey_source_mask; 2621 event_mask = hotkey_source_mask & 2622 (hotkey_driver_mask | hotkey_user_mask); 2623 poll_freq = hotkey_poll_freq; 2624 mutex_unlock(&hotkey_thread_data_mutex); 2625 hotkey_read_nvram(&s[so], poll_mask); 2626 2627 while (!kthread_should_stop()) { 2628 if (t == 0) { 2629 if (likely(poll_freq)) 2630 t = 1000/poll_freq; 2631 else 2632 t = 100; /* should never happen... */ 2633 } 2634 t = msleep_interruptible(t); 2635 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2636 break; 2637 2638 if (t > 0 && !was_frozen) 2639 continue; 2640 2641 mutex_lock(&hotkey_thread_data_mutex); 2642 if (was_frozen || hotkey_config_change != change_detector) { 2643 /* forget old state on thaw or config change */ 2644 si = so; 2645 t = 0; 2646 change_detector = hotkey_config_change; 2647 } 2648 poll_mask = hotkey_source_mask; 2649 event_mask = hotkey_source_mask & 2650 (hotkey_driver_mask | hotkey_user_mask); 2651 poll_freq = hotkey_poll_freq; 2652 mutex_unlock(&hotkey_thread_data_mutex); 2653 2654 if (likely(poll_mask)) { 2655 hotkey_read_nvram(&s[si], poll_mask); 2656 if (likely(si != so)) { 2657 hotkey_compare_and_issue_event(&s[so], &s[si], 2658 event_mask); 2659 } 2660 } 2661 2662 so = si; 2663 si ^= 1; 2664 } 2665 2666 exit: 2667 return 0; 2668 } 2669 2670 /* call with hotkey_mutex held */ 2671 static void hotkey_poll_stop_sync(void) 2672 { 2673 if (tpacpi_hotkey_task) { 2674 kthread_stop(tpacpi_hotkey_task); 2675 tpacpi_hotkey_task = NULL; 2676 } 2677 } 2678 2679 /* call with hotkey_mutex held */ 2680 static void hotkey_poll_setup(const bool may_warn) 2681 { 2682 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2683 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2684 2685 if (hotkey_poll_freq > 0 && 2686 (poll_driver_mask || 2687 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2688 if (!tpacpi_hotkey_task) { 2689 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2690 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2691 if (IS_ERR(tpacpi_hotkey_task)) { 2692 tpacpi_hotkey_task = NULL; 2693 pr_err("could not create kernel thread for hotkey polling\n"); 2694 } 2695 } 2696 } else { 2697 hotkey_poll_stop_sync(); 2698 if (may_warn && (poll_driver_mask || poll_user_mask) && 2699 hotkey_poll_freq == 0) { 2700 pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n", 2701 poll_user_mask, poll_driver_mask); 2702 } 2703 } 2704 } 2705 2706 static void hotkey_poll_setup_safe(const bool may_warn) 2707 { 2708 mutex_lock(&hotkey_mutex); 2709 hotkey_poll_setup(may_warn); 2710 mutex_unlock(&hotkey_mutex); 2711 } 2712 2713 /* call with hotkey_mutex held */ 2714 static void hotkey_poll_set_freq(unsigned int freq) 2715 { 2716 if (!freq) 2717 hotkey_poll_stop_sync(); 2718 2719 hotkey_poll_freq = freq; 2720 } 2721 2722 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2723 2724 static void hotkey_poll_setup(const bool __unused) 2725 { 2726 } 2727 2728 static void hotkey_poll_setup_safe(const bool __unused) 2729 { 2730 } 2731 2732 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2733 2734 static int hotkey_inputdev_open(struct input_dev *dev) 2735 { 2736 switch (tpacpi_lifecycle) { 2737 case TPACPI_LIFE_INIT: 2738 case TPACPI_LIFE_RUNNING: 2739 hotkey_poll_setup_safe(false); 2740 return 0; 2741 case TPACPI_LIFE_EXITING: 2742 return -EBUSY; 2743 } 2744 2745 /* Should only happen if tpacpi_lifecycle is corrupt */ 2746 BUG(); 2747 return -EBUSY; 2748 } 2749 2750 static void hotkey_inputdev_close(struct input_dev *dev) 2751 { 2752 /* disable hotkey polling when possible */ 2753 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2754 !(hotkey_source_mask & hotkey_driver_mask)) 2755 hotkey_poll_setup_safe(false); 2756 } 2757 2758 /* sysfs hotkey enable ------------------------------------------------- */ 2759 static ssize_t hotkey_enable_show(struct device *dev, 2760 struct device_attribute *attr, 2761 char *buf) 2762 { 2763 int res, status; 2764 2765 printk_deprecated_attribute("hotkey_enable", 2766 "Hotkey reporting is always enabled"); 2767 2768 res = hotkey_status_get(&status); 2769 if (res) 2770 return res; 2771 2772 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2773 } 2774 2775 static ssize_t hotkey_enable_store(struct device *dev, 2776 struct device_attribute *attr, 2777 const char *buf, size_t count) 2778 { 2779 unsigned long t; 2780 2781 printk_deprecated_attribute("hotkey_enable", 2782 "Hotkeys can be disabled through hotkey_mask"); 2783 2784 if (parse_strtoul(buf, 1, &t)) 2785 return -EINVAL; 2786 2787 if (t == 0) 2788 return -EPERM; 2789 2790 return count; 2791 } 2792 2793 static DEVICE_ATTR_RW(hotkey_enable); 2794 2795 /* sysfs hotkey mask --------------------------------------------------- */ 2796 static ssize_t hotkey_mask_show(struct device *dev, 2797 struct device_attribute *attr, 2798 char *buf) 2799 { 2800 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2801 } 2802 2803 static ssize_t hotkey_mask_store(struct device *dev, 2804 struct device_attribute *attr, 2805 const char *buf, size_t count) 2806 { 2807 unsigned long t; 2808 int res; 2809 2810 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2811 return -EINVAL; 2812 2813 if (mutex_lock_killable(&hotkey_mutex)) 2814 return -ERESTARTSYS; 2815 2816 res = hotkey_user_mask_set(t); 2817 2818 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2819 hotkey_poll_setup(true); 2820 #endif 2821 2822 mutex_unlock(&hotkey_mutex); 2823 2824 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2825 2826 return (res) ? res : count; 2827 } 2828 2829 static DEVICE_ATTR_RW(hotkey_mask); 2830 2831 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2832 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2833 struct device_attribute *attr, 2834 char *buf) 2835 { 2836 return sprintf(buf, "0\n"); 2837 } 2838 2839 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2840 2841 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2842 static ssize_t hotkey_bios_mask_show(struct device *dev, 2843 struct device_attribute *attr, 2844 char *buf) 2845 { 2846 printk_deprecated_attribute("hotkey_bios_mask", 2847 "This attribute is useless."); 2848 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2849 } 2850 2851 static DEVICE_ATTR_RO(hotkey_bios_mask); 2852 2853 /* sysfs hotkey all_mask ----------------------------------------------- */ 2854 static ssize_t hotkey_all_mask_show(struct device *dev, 2855 struct device_attribute *attr, 2856 char *buf) 2857 { 2858 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2859 hotkey_all_mask | hotkey_source_mask); 2860 } 2861 2862 static DEVICE_ATTR_RO(hotkey_all_mask); 2863 2864 /* sysfs hotkey all_mask ----------------------------------------------- */ 2865 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev, 2866 struct device_attribute *attr, 2867 char *buf) 2868 { 2869 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2870 hotkey_adaptive_all_mask | hotkey_source_mask); 2871 } 2872 2873 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask); 2874 2875 /* sysfs hotkey recommended_mask --------------------------------------- */ 2876 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2877 struct device_attribute *attr, 2878 char *buf) 2879 { 2880 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2881 (hotkey_all_mask | hotkey_source_mask) 2882 & ~hotkey_reserved_mask); 2883 } 2884 2885 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2886 2887 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2888 2889 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2890 static ssize_t hotkey_source_mask_show(struct device *dev, 2891 struct device_attribute *attr, 2892 char *buf) 2893 { 2894 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2895 } 2896 2897 static ssize_t hotkey_source_mask_store(struct device *dev, 2898 struct device_attribute *attr, 2899 const char *buf, size_t count) 2900 { 2901 unsigned long t; 2902 u32 r_ev; 2903 int rc; 2904 2905 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2906 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2907 return -EINVAL; 2908 2909 if (mutex_lock_killable(&hotkey_mutex)) 2910 return -ERESTARTSYS; 2911 2912 HOTKEY_CONFIG_CRITICAL_START 2913 hotkey_source_mask = t; 2914 HOTKEY_CONFIG_CRITICAL_END 2915 2916 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2917 ~hotkey_source_mask); 2918 hotkey_poll_setup(true); 2919 2920 /* check if events needed by the driver got disabled */ 2921 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2922 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2923 2924 mutex_unlock(&hotkey_mutex); 2925 2926 if (rc < 0) 2927 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n"); 2928 2929 if (r_ev) 2930 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n", 2931 r_ev); 2932 2933 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2934 2935 return (rc < 0) ? rc : count; 2936 } 2937 2938 static DEVICE_ATTR_RW(hotkey_source_mask); 2939 2940 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2941 static ssize_t hotkey_poll_freq_show(struct device *dev, 2942 struct device_attribute *attr, 2943 char *buf) 2944 { 2945 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2946 } 2947 2948 static ssize_t hotkey_poll_freq_store(struct device *dev, 2949 struct device_attribute *attr, 2950 const char *buf, size_t count) 2951 { 2952 unsigned long t; 2953 2954 if (parse_strtoul(buf, 25, &t)) 2955 return -EINVAL; 2956 2957 if (mutex_lock_killable(&hotkey_mutex)) 2958 return -ERESTARTSYS; 2959 2960 hotkey_poll_set_freq(t); 2961 hotkey_poll_setup(true); 2962 2963 mutex_unlock(&hotkey_mutex); 2964 2965 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2966 2967 return count; 2968 } 2969 2970 static DEVICE_ATTR_RW(hotkey_poll_freq); 2971 2972 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2973 2974 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2975 static ssize_t hotkey_radio_sw_show(struct device *dev, 2976 struct device_attribute *attr, 2977 char *buf) 2978 { 2979 int res; 2980 res = hotkey_get_wlsw(); 2981 if (res < 0) 2982 return res; 2983 2984 /* Opportunistic update */ 2985 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2986 2987 return snprintf(buf, PAGE_SIZE, "%d\n", 2988 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2989 } 2990 2991 static DEVICE_ATTR_RO(hotkey_radio_sw); 2992 2993 static void hotkey_radio_sw_notify_change(void) 2994 { 2995 if (tp_features.hotkey_wlsw) 2996 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2997 "hotkey_radio_sw"); 2998 } 2999 3000 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 3001 static ssize_t hotkey_tablet_mode_show(struct device *dev, 3002 struct device_attribute *attr, 3003 char *buf) 3004 { 3005 int res, s; 3006 res = hotkey_get_tablet_mode(&s); 3007 if (res < 0) 3008 return res; 3009 3010 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 3011 } 3012 3013 static DEVICE_ATTR_RO(hotkey_tablet_mode); 3014 3015 static void hotkey_tablet_mode_notify_change(void) 3016 { 3017 if (tp_features.hotkey_tablet) 3018 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3019 "hotkey_tablet_mode"); 3020 } 3021 3022 /* sysfs wakeup reason (pollable) -------------------------------------- */ 3023 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 3024 struct device_attribute *attr, 3025 char *buf) 3026 { 3027 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 3028 } 3029 3030 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 3031 3032 static void hotkey_wakeup_reason_notify_change(void) 3033 { 3034 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3035 "wakeup_reason"); 3036 } 3037 3038 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 3039 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 3040 struct device_attribute *attr, 3041 char *buf) 3042 { 3043 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 3044 } 3045 3046 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 3047 hotkey_wakeup_hotunplug_complete_show, NULL); 3048 3049 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 3050 { 3051 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3052 "wakeup_hotunplug_complete"); 3053 } 3054 3055 /* sysfs adaptive kbd mode --------------------------------------------- */ 3056 3057 static int adaptive_keyboard_get_mode(void); 3058 static int adaptive_keyboard_set_mode(int new_mode); 3059 3060 enum ADAPTIVE_KEY_MODE { 3061 HOME_MODE, 3062 WEB_BROWSER_MODE, 3063 WEB_CONFERENCE_MODE, 3064 FUNCTION_MODE, 3065 LAYFLAT_MODE 3066 }; 3067 3068 static ssize_t adaptive_kbd_mode_show(struct device *dev, 3069 struct device_attribute *attr, 3070 char *buf) 3071 { 3072 int current_mode; 3073 3074 current_mode = adaptive_keyboard_get_mode(); 3075 if (current_mode < 0) 3076 return current_mode; 3077 3078 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 3079 } 3080 3081 static ssize_t adaptive_kbd_mode_store(struct device *dev, 3082 struct device_attribute *attr, 3083 const char *buf, size_t count) 3084 { 3085 unsigned long t; 3086 int res; 3087 3088 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 3089 return -EINVAL; 3090 3091 res = adaptive_keyboard_set_mode(t); 3092 return (res < 0) ? res : count; 3093 } 3094 3095 static DEVICE_ATTR_RW(adaptive_kbd_mode); 3096 3097 static struct attribute *adaptive_kbd_attributes[] = { 3098 &dev_attr_adaptive_kbd_mode.attr, 3099 NULL 3100 }; 3101 3102 static const struct attribute_group adaptive_kbd_attr_group = { 3103 .attrs = adaptive_kbd_attributes, 3104 }; 3105 3106 /* --------------------------------------------------------------------- */ 3107 3108 static struct attribute *hotkey_attributes[] __initdata = { 3109 &dev_attr_hotkey_enable.attr, 3110 &dev_attr_hotkey_bios_enabled.attr, 3111 &dev_attr_hotkey_bios_mask.attr, 3112 &dev_attr_wakeup_reason.attr, 3113 &dev_attr_wakeup_hotunplug_complete.attr, 3114 &dev_attr_hotkey_mask.attr, 3115 &dev_attr_hotkey_all_mask.attr, 3116 &dev_attr_hotkey_adaptive_all_mask.attr, 3117 &dev_attr_hotkey_recommended_mask.attr, 3118 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3119 &dev_attr_hotkey_source_mask.attr, 3120 &dev_attr_hotkey_poll_freq.attr, 3121 #endif 3122 }; 3123 3124 /* 3125 * Sync both the hw and sw blocking state of all switches 3126 */ 3127 static void tpacpi_send_radiosw_update(void) 3128 { 3129 int wlsw; 3130 3131 /* 3132 * We must sync all rfkill controllers *before* issuing any 3133 * rfkill input events, or we will race the rfkill core input 3134 * handler. 3135 * 3136 * tpacpi_inputdev_send_mutex works as a synchronization point 3137 * for the above. 3138 * 3139 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3140 */ 3141 3142 wlsw = hotkey_get_wlsw(); 3143 3144 /* Sync hw blocking state first if it is hw-blocked */ 3145 if (wlsw == TPACPI_RFK_RADIO_OFF) 3146 tpacpi_rfk_update_hwblock_state(true); 3147 3148 /* Sync sw blocking state */ 3149 tpacpi_rfk_update_swstate_all(); 3150 3151 /* Sync hw blocking state last if it is hw-unblocked */ 3152 if (wlsw == TPACPI_RFK_RADIO_ON) 3153 tpacpi_rfk_update_hwblock_state(false); 3154 3155 /* Issue rfkill input event for WLSW switch */ 3156 if (!(wlsw < 0)) { 3157 mutex_lock(&tpacpi_inputdev_send_mutex); 3158 3159 input_report_switch(tpacpi_inputdev, 3160 SW_RFKILL_ALL, (wlsw > 0)); 3161 input_sync(tpacpi_inputdev); 3162 3163 mutex_unlock(&tpacpi_inputdev_send_mutex); 3164 } 3165 3166 /* 3167 * this can be unconditional, as we will poll state again 3168 * if userspace uses the notify to read data 3169 */ 3170 hotkey_radio_sw_notify_change(); 3171 } 3172 3173 static void hotkey_exit(void) 3174 { 3175 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3176 mutex_lock(&hotkey_mutex); 3177 hotkey_poll_stop_sync(); 3178 mutex_unlock(&hotkey_mutex); 3179 #endif 3180 3181 if (hotkey_dev_attributes) 3182 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3183 3184 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3185 "restoring original HKEY status and mask\n"); 3186 /* yes, there is a bitwise or below, we want the 3187 * functions to be called even if one of them fail */ 3188 if (((tp_features.hotkey_mask && 3189 hotkey_mask_set(hotkey_orig_mask)) | 3190 hotkey_status_set(false)) != 0) 3191 pr_err("failed to restore hot key mask to BIOS defaults\n"); 3192 } 3193 3194 static void __init hotkey_unmap(const unsigned int scancode) 3195 { 3196 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3197 clear_bit(hotkey_keycode_map[scancode], 3198 tpacpi_inputdev->keybit); 3199 hotkey_keycode_map[scancode] = KEY_RESERVED; 3200 } 3201 } 3202 3203 /* 3204 * HKEY quirks: 3205 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3206 */ 3207 3208 #define TPACPI_HK_Q_INIMASK 0x0001 3209 3210 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3211 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3212 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3213 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3214 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3215 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3216 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3217 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3218 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3219 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3220 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3221 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3222 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3223 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3224 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3225 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3226 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3227 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3228 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3229 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3230 }; 3231 3232 typedef u16 tpacpi_keymap_entry_t; 3233 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3234 3235 static int hotkey_init_tablet_mode(void) 3236 { 3237 int in_tablet_mode = 0, res; 3238 char *type = NULL; 3239 3240 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) { 3241 int has_tablet_mode; 3242 3243 in_tablet_mode = hotkey_gmms_get_tablet_mode(res, 3244 &has_tablet_mode); 3245 if (has_tablet_mode) 3246 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS; 3247 type = "GMMS"; 3248 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { 3249 /* For X41t, X60t, X61t Tablets... */ 3250 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; 3251 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); 3252 type = "MHKG"; 3253 } 3254 3255 if (!tp_features.hotkey_tablet) 3256 return 0; 3257 3258 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", 3259 type, in_tablet_mode ? "tablet" : "laptop"); 3260 3261 res = add_to_attr_set(hotkey_dev_attributes, 3262 &dev_attr_hotkey_tablet_mode.attr); 3263 if (res) 3264 return -1; 3265 3266 return in_tablet_mode; 3267 } 3268 3269 static int __init hotkey_init(struct ibm_init_struct *iibm) 3270 { 3271 /* Requirements for changing the default keymaps: 3272 * 3273 * 1. Many of the keys are mapped to KEY_RESERVED for very 3274 * good reasons. Do not change them unless you have deep 3275 * knowledge on the IBM and Lenovo ThinkPad firmware for 3276 * the various ThinkPad models. The driver behaves 3277 * differently for KEY_RESERVED: such keys have their 3278 * hot key mask *unset* in mask_recommended, and also 3279 * in the initial hot key mask programmed into the 3280 * firmware at driver load time, which means the firm- 3281 * ware may react very differently if you change them to 3282 * something else; 3283 * 3284 * 2. You must be subscribed to the linux-thinkpad and 3285 * ibm-acpi-devel mailing lists, and you should read the 3286 * list archives since 2007 if you want to change the 3287 * keymaps. This requirement exists so that you will 3288 * know the past history of problems with the thinkpad- 3289 * acpi driver keymaps, and also that you will be 3290 * listening to any bug reports; 3291 * 3292 * 3. Do not send thinkpad-acpi specific patches directly to 3293 * for merging, *ever*. Send them to the linux-acpi 3294 * mailinglist for comments. Merging is to be done only 3295 * through acpi-test and the ACPI maintainer. 3296 * 3297 * If the above is too much to ask, don't change the keymap. 3298 * Ask the thinkpad-acpi maintainer to do it, instead. 3299 */ 3300 3301 enum keymap_index { 3302 TPACPI_KEYMAP_IBM_GENERIC = 0, 3303 TPACPI_KEYMAP_LENOVO_GENERIC, 3304 }; 3305 3306 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3307 /* Generic keymap for IBM ThinkPads */ 3308 [TPACPI_KEYMAP_IBM_GENERIC] = { 3309 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3310 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3311 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3312 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3313 3314 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3315 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3316 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3317 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3318 3319 /* brightness: firmware always reacts to them */ 3320 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3321 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3322 3323 /* Thinklight: firmware always react to it */ 3324 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3325 3326 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3327 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3328 3329 /* Volume: firmware always react to it and reprograms 3330 * the built-in *extra* mixer. Never map it to control 3331 * another mixer by default. */ 3332 KEY_RESERVED, /* 0x14: VOLUME UP */ 3333 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3334 KEY_RESERVED, /* 0x16: MUTE */ 3335 3336 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3337 3338 /* (assignments unknown, please report if found) */ 3339 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3340 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3341 3342 /* No assignments, only used for Adaptive keyboards. */ 3343 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3344 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3345 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3346 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3347 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3348 3349 /* No assignment, used for newer Lenovo models */ 3350 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3351 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3352 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3353 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3354 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3355 KEY_UNKNOWN, KEY_UNKNOWN 3356 3357 }, 3358 3359 /* Generic keymap for Lenovo ThinkPads */ 3360 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3361 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3362 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3363 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3364 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3365 3366 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3367 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3368 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3369 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3370 3371 /* These should be enabled --only-- when ACPI video 3372 * is disabled (i.e. in "vendor" mode), and are handled 3373 * in a special way by the init code */ 3374 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3375 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3376 3377 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3378 3379 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3380 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3381 3382 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3383 * react to it and reprograms the built-in *extra* mixer. 3384 * Never map it to control another mixer by default. 3385 * 3386 * T60?, T61, R60?, R61: firmware and EC tries to send 3387 * these over the regular keyboard, so these are no-ops, 3388 * but there are still weird bugs re. MUTE, so do not 3389 * change unless you get test reports from all Lenovo 3390 * models. May cause the BIOS to interfere with the 3391 * HDA mixer. 3392 */ 3393 KEY_RESERVED, /* 0x14: VOLUME UP */ 3394 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3395 KEY_RESERVED, /* 0x16: MUTE */ 3396 3397 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3398 3399 /* (assignments unknown, please report if found) */ 3400 KEY_UNKNOWN, KEY_UNKNOWN, 3401 3402 /* 3403 * The mic mute button only sends 0x1a. It does not 3404 * automatically mute the mic or change the mute light. 3405 */ 3406 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3407 3408 /* (assignments unknown, please report if found) */ 3409 KEY_UNKNOWN, 3410 3411 /* Extra keys in use since the X240 / T440 / T540 */ 3412 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3413 3414 /* 3415 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3416 * The first item in this list is the Mute button which is 3417 * emitted with 0x103 through 3418 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3419 * symbol is held. 3420 * We'll need to offset those by 0x20. 3421 */ 3422 KEY_RESERVED, /* Mute held, 0x103 */ 3423 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3424 KEY_RESERVED, /* Clipping tool */ 3425 KEY_RESERVED, /* Cloud */ 3426 KEY_RESERVED, 3427 KEY_VOICECOMMAND, /* Voice */ 3428 KEY_RESERVED, 3429 KEY_RESERVED, /* Gestures */ 3430 KEY_RESERVED, 3431 KEY_RESERVED, 3432 KEY_RESERVED, 3433 KEY_CONFIG, /* Settings */ 3434 KEY_RESERVED, /* New tab */ 3435 KEY_REFRESH, /* Reload */ 3436 KEY_BACK, /* Back */ 3437 KEY_RESERVED, /* Microphone down */ 3438 KEY_RESERVED, /* Microphone up */ 3439 KEY_RESERVED, /* Microphone cancellation */ 3440 KEY_RESERVED, /* Camera mode */ 3441 KEY_RESERVED, /* Rotate display, 0x116 */ 3442 3443 /* 3444 * These are found in 2017 models (e.g. T470s, X270). 3445 * The lowest known value is 0x311, which according to 3446 * the manual should launch a user defined favorite 3447 * application. 3448 * 3449 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START, 3450 * corresponding to 0x34. 3451 */ 3452 3453 /* (assignments unknown, please report if found) */ 3454 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3455 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3456 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3457 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3458 KEY_UNKNOWN, 3459 3460 KEY_FAVORITES, /* Favorite app, 0x311 */ 3461 KEY_RESERVED, /* Clipping tool */ 3462 KEY_CALC, /* Calculator (above numpad, P52) */ 3463 KEY_BLUETOOTH, /* Bluetooth */ 3464 KEY_KEYBOARD /* Keyboard, 0x315 */ 3465 }, 3466 }; 3467 3468 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3469 /* Generic maps (fallback) */ 3470 { 3471 .vendor = PCI_VENDOR_ID_IBM, 3472 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3473 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3474 }, 3475 { 3476 .vendor = PCI_VENDOR_ID_LENOVO, 3477 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3478 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3479 }, 3480 }; 3481 3482 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3483 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3484 3485 int res, i; 3486 int status; 3487 int hkeyv; 3488 bool radiosw_state = false; 3489 bool tabletsw_state = false; 3490 3491 unsigned long quirks; 3492 unsigned long keymap_id; 3493 3494 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3495 "initializing hotkey subdriver\n"); 3496 3497 BUG_ON(!tpacpi_inputdev); 3498 BUG_ON(tpacpi_inputdev->open != NULL || 3499 tpacpi_inputdev->close != NULL); 3500 3501 TPACPI_ACPIHANDLE_INIT(hkey); 3502 mutex_init(&hotkey_mutex); 3503 3504 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3505 mutex_init(&hotkey_thread_data_mutex); 3506 #endif 3507 3508 /* hotkey not supported on 570 */ 3509 tp_features.hotkey = hkey_handle != NULL; 3510 3511 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3512 "hotkeys are %s\n", 3513 str_supported(tp_features.hotkey)); 3514 3515 if (!tp_features.hotkey) 3516 return 1; 3517 3518 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3519 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3520 3521 tpacpi_disable_brightness_delay(); 3522 3523 /* MUST have enough space for all attributes to be added to 3524 * hotkey_dev_attributes */ 3525 hotkey_dev_attributes = create_attr_set( 3526 ARRAY_SIZE(hotkey_attributes) + 2, 3527 NULL); 3528 if (!hotkey_dev_attributes) 3529 return -ENOMEM; 3530 res = add_many_to_attr_set(hotkey_dev_attributes, 3531 hotkey_attributes, 3532 ARRAY_SIZE(hotkey_attributes)); 3533 if (res) 3534 goto err_exit; 3535 3536 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3537 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3538 for HKEY interface version 0x100 */ 3539 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3540 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3541 "firmware HKEY interface version: 0x%x\n", 3542 hkeyv); 3543 3544 switch (hkeyv >> 8) { 3545 case 1: 3546 /* 3547 * MHKV 0x100 in A31, R40, R40e, 3548 * T4x, X31, and later 3549 */ 3550 3551 /* Paranoia check AND init hotkey_all_mask */ 3552 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3553 "MHKA", "qd")) { 3554 pr_err("missing MHKA handler, please report this to %s\n", 3555 TPACPI_MAIL); 3556 /* Fallback: pre-init for FN+F3,F4,F12 */ 3557 hotkey_all_mask = 0x080cU; 3558 } else { 3559 tp_features.hotkey_mask = 1; 3560 } 3561 break; 3562 3563 case 2: 3564 /* 3565 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3566 */ 3567 3568 /* Paranoia check AND init hotkey_all_mask */ 3569 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3570 "MHKA", "dd", 1)) { 3571 pr_err("missing MHKA handler, please report this to %s\n", 3572 TPACPI_MAIL); 3573 /* Fallback: pre-init for FN+F3,F4,F12 */ 3574 hotkey_all_mask = 0x080cU; 3575 } else { 3576 tp_features.hotkey_mask = 1; 3577 } 3578 3579 /* 3580 * Check if we have an adaptive keyboard, like on the 3581 * Lenovo Carbon X1 2014 (2nd Gen). 3582 */ 3583 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3584 "MHKA", "dd", 2)) { 3585 if (hotkey_adaptive_all_mask != 0) { 3586 tp_features.has_adaptive_kbd = true; 3587 res = sysfs_create_group( 3588 &tpacpi_pdev->dev.kobj, 3589 &adaptive_kbd_attr_group); 3590 if (res) 3591 goto err_exit; 3592 } 3593 } else { 3594 tp_features.has_adaptive_kbd = false; 3595 hotkey_adaptive_all_mask = 0x0U; 3596 } 3597 break; 3598 3599 default: 3600 pr_err("unknown version of the HKEY interface: 0x%x\n", 3601 hkeyv); 3602 pr_err("please report this to %s\n", TPACPI_MAIL); 3603 break; 3604 } 3605 } 3606 3607 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3608 "hotkey masks are %s\n", 3609 str_supported(tp_features.hotkey_mask)); 3610 3611 /* Init hotkey_all_mask if not initialized yet */ 3612 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3613 (quirks & TPACPI_HK_Q_INIMASK)) 3614 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3615 3616 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3617 if (tp_features.hotkey_mask) { 3618 /* hotkey_source_mask *must* be zero for 3619 * the first hotkey_mask_get to return hotkey_orig_mask */ 3620 res = hotkey_mask_get(); 3621 if (res) 3622 goto err_exit; 3623 3624 hotkey_orig_mask = hotkey_acpi_mask; 3625 } else { 3626 hotkey_orig_mask = hotkey_all_mask; 3627 hotkey_acpi_mask = hotkey_all_mask; 3628 } 3629 3630 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3631 if (dbg_wlswemul) { 3632 tp_features.hotkey_wlsw = 1; 3633 radiosw_state = !!tpacpi_wlsw_emulstate; 3634 pr_info("radio switch emulation enabled\n"); 3635 } else 3636 #endif 3637 /* Not all thinkpads have a hardware radio switch */ 3638 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3639 tp_features.hotkey_wlsw = 1; 3640 radiosw_state = !!status; 3641 pr_info("radio switch found; radios are %s\n", 3642 enabled(status, 0)); 3643 } 3644 if (tp_features.hotkey_wlsw) 3645 res = add_to_attr_set(hotkey_dev_attributes, 3646 &dev_attr_hotkey_radio_sw.attr); 3647 3648 res = hotkey_init_tablet_mode(); 3649 if (res < 0) 3650 goto err_exit; 3651 3652 tabletsw_state = res; 3653 3654 res = register_attr_set_with_sysfs(hotkey_dev_attributes, 3655 &tpacpi_pdev->dev.kobj); 3656 if (res) 3657 goto err_exit; 3658 3659 /* Set up key map */ 3660 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3661 GFP_KERNEL); 3662 if (!hotkey_keycode_map) { 3663 pr_err("failed to allocate memory for key map\n"); 3664 res = -ENOMEM; 3665 goto err_exit; 3666 } 3667 3668 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3669 ARRAY_SIZE(tpacpi_keymap_qtable)); 3670 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3671 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3672 "using keymap number %lu\n", keymap_id); 3673 3674 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3675 TPACPI_HOTKEY_MAP_SIZE); 3676 3677 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3678 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3679 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3680 tpacpi_inputdev->keycode = hotkey_keycode_map; 3681 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3682 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3683 input_set_capability(tpacpi_inputdev, EV_KEY, 3684 hotkey_keycode_map[i]); 3685 } else { 3686 if (i < sizeof(hotkey_reserved_mask)*8) 3687 hotkey_reserved_mask |= 1 << i; 3688 } 3689 } 3690 3691 if (tp_features.hotkey_wlsw) { 3692 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3693 input_report_switch(tpacpi_inputdev, 3694 SW_RFKILL_ALL, radiosw_state); 3695 } 3696 if (tp_features.hotkey_tablet) { 3697 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3698 input_report_switch(tpacpi_inputdev, 3699 SW_TABLET_MODE, tabletsw_state); 3700 } 3701 3702 /* Do not issue duplicate brightness change events to 3703 * userspace. tpacpi_detect_brightness_capabilities() must have 3704 * been called before this point */ 3705 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3706 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n"); 3707 pr_notice("Disabling thinkpad-acpi brightness events by default...\n"); 3708 3709 /* Disable brightness up/down on Lenovo thinkpads when 3710 * ACPI is handling them, otherwise it is plain impossible 3711 * for userspace to do something even remotely sane */ 3712 hotkey_reserved_mask |= 3713 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3714 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3715 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3716 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3717 } 3718 3719 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3720 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3721 & ~hotkey_all_mask 3722 & ~hotkey_reserved_mask; 3723 3724 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3725 "hotkey source mask 0x%08x, polling freq %u\n", 3726 hotkey_source_mask, hotkey_poll_freq); 3727 #endif 3728 3729 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3730 "enabling firmware HKEY event interface...\n"); 3731 res = hotkey_status_set(true); 3732 if (res) { 3733 hotkey_exit(); 3734 return res; 3735 } 3736 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3737 | hotkey_driver_mask) 3738 & ~hotkey_source_mask); 3739 if (res < 0 && res != -ENXIO) { 3740 hotkey_exit(); 3741 return res; 3742 } 3743 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3744 & ~hotkey_reserved_mask; 3745 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3746 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3747 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3748 3749 tpacpi_inputdev->open = &hotkey_inputdev_open; 3750 tpacpi_inputdev->close = &hotkey_inputdev_close; 3751 3752 hotkey_poll_setup_safe(true); 3753 3754 return 0; 3755 3756 err_exit: 3757 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3758 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3759 &adaptive_kbd_attr_group); 3760 3761 hotkey_dev_attributes = NULL; 3762 3763 return (res < 0) ? res : 1; 3764 } 3765 3766 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3767 * mode, Web conference mode, Function mode and Lay-flat mode. 3768 * We support Home mode and Function mode currently. 3769 * 3770 * Will consider support rest of modes in future. 3771 * 3772 */ 3773 static const int adaptive_keyboard_modes[] = { 3774 HOME_MODE, 3775 /* WEB_BROWSER_MODE = 2, 3776 WEB_CONFERENCE_MODE = 3, */ 3777 FUNCTION_MODE 3778 }; 3779 3780 #define DFR_CHANGE_ROW 0x101 3781 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3782 #define FIRST_ADAPTIVE_KEY 0x103 3783 3784 /* press Fn key a while second, it will switch to Function Mode. Then 3785 * release Fn key, previous mode be restored. 3786 */ 3787 static bool adaptive_keyboard_mode_is_saved; 3788 static int adaptive_keyboard_prev_mode; 3789 3790 static int adaptive_keyboard_get_mode(void) 3791 { 3792 int mode = 0; 3793 3794 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3795 pr_err("Cannot read adaptive keyboard mode\n"); 3796 return -EIO; 3797 } 3798 3799 return mode; 3800 } 3801 3802 static int adaptive_keyboard_set_mode(int new_mode) 3803 { 3804 if (new_mode < 0 || 3805 new_mode > LAYFLAT_MODE) 3806 return -EINVAL; 3807 3808 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3809 pr_err("Cannot set adaptive keyboard mode\n"); 3810 return -EIO; 3811 } 3812 3813 return 0; 3814 } 3815 3816 static int adaptive_keyboard_get_next_mode(int mode) 3817 { 3818 size_t i; 3819 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3820 3821 for (i = 0; i <= max_mode; i++) { 3822 if (adaptive_keyboard_modes[i] == mode) 3823 break; 3824 } 3825 3826 if (i >= max_mode) 3827 i = 0; 3828 else 3829 i++; 3830 3831 return adaptive_keyboard_modes[i]; 3832 } 3833 3834 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3835 { 3836 int current_mode = 0; 3837 int new_mode = 0; 3838 int keycode; 3839 3840 switch (scancode) { 3841 case DFR_CHANGE_ROW: 3842 if (adaptive_keyboard_mode_is_saved) { 3843 new_mode = adaptive_keyboard_prev_mode; 3844 adaptive_keyboard_mode_is_saved = false; 3845 } else { 3846 current_mode = adaptive_keyboard_get_mode(); 3847 if (current_mode < 0) 3848 return false; 3849 new_mode = adaptive_keyboard_get_next_mode( 3850 current_mode); 3851 } 3852 3853 if (adaptive_keyboard_set_mode(new_mode) < 0) 3854 return false; 3855 3856 return true; 3857 3858 case DFR_SHOW_QUICKVIEW_ROW: 3859 current_mode = adaptive_keyboard_get_mode(); 3860 if (current_mode < 0) 3861 return false; 3862 3863 adaptive_keyboard_prev_mode = current_mode; 3864 adaptive_keyboard_mode_is_saved = true; 3865 3866 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3867 return false; 3868 return true; 3869 3870 default: 3871 if (scancode < FIRST_ADAPTIVE_KEY || 3872 scancode >= FIRST_ADAPTIVE_KEY + 3873 TP_ACPI_HOTKEYSCAN_EXTENDED_START - 3874 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3875 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3876 scancode); 3877 return false; 3878 } 3879 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + 3880 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START]; 3881 if (keycode != KEY_RESERVED) { 3882 mutex_lock(&tpacpi_inputdev_send_mutex); 3883 3884 input_report_key(tpacpi_inputdev, keycode, 1); 3885 input_sync(tpacpi_inputdev); 3886 3887 input_report_key(tpacpi_inputdev, keycode, 0); 3888 input_sync(tpacpi_inputdev); 3889 3890 mutex_unlock(&tpacpi_inputdev_send_mutex); 3891 } 3892 return true; 3893 } 3894 } 3895 3896 static bool hotkey_notify_hotkey(const u32 hkey, 3897 bool *send_acpi_ev, 3898 bool *ignore_acpi_ev) 3899 { 3900 /* 0x1000-0x1FFF: key presses */ 3901 unsigned int scancode = hkey & 0xfff; 3902 *send_acpi_ev = true; 3903 *ignore_acpi_ev = false; 3904 3905 /* 3906 * Original events are in the 0x10XX range, the adaptive keyboard 3907 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017 3908 * models, additional keys are emitted through 0x13XX. 3909 */ 3910 switch ((hkey >> 8) & 0xf) { 3911 case 0: 3912 if (scancode > 0 && 3913 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3914 /* HKEY event 0x1001 is scancode 0x00 */ 3915 scancode--; 3916 if (!(hotkey_source_mask & (1 << scancode))) { 3917 tpacpi_input_send_key_masked(scancode); 3918 *send_acpi_ev = false; 3919 } else { 3920 *ignore_acpi_ev = true; 3921 } 3922 return true; 3923 } 3924 break; 3925 3926 case 1: 3927 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3928 3929 case 3: 3930 /* Extended keycodes start at 0x300 and our offset into the map 3931 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode 3932 * will be positive, but might not be in the correct range. 3933 */ 3934 scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START); 3935 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START && 3936 scancode < TPACPI_HOTKEY_MAP_LEN) { 3937 tpacpi_input_send_key(scancode); 3938 return true; 3939 } 3940 break; 3941 } 3942 3943 return false; 3944 } 3945 3946 static bool hotkey_notify_wakeup(const u32 hkey, 3947 bool *send_acpi_ev, 3948 bool *ignore_acpi_ev) 3949 { 3950 /* 0x2000-0x2FFF: Wakeup reason */ 3951 *send_acpi_ev = true; 3952 *ignore_acpi_ev = false; 3953 3954 switch (hkey) { 3955 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3956 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3957 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3958 *ignore_acpi_ev = true; 3959 break; 3960 3961 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3962 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3963 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3964 *ignore_acpi_ev = true; 3965 break; 3966 3967 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3968 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3969 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3970 /* how to auto-heal: */ 3971 /* 2313: woke up from S3, go to S4/S5 */ 3972 /* 2413: woke up from S4, go to S5 */ 3973 break; 3974 3975 default: 3976 return false; 3977 } 3978 3979 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3980 pr_info("woke up due to a hot-unplug request...\n"); 3981 hotkey_wakeup_reason_notify_change(); 3982 } 3983 return true; 3984 } 3985 3986 static bool hotkey_notify_dockevent(const u32 hkey, 3987 bool *send_acpi_ev, 3988 bool *ignore_acpi_ev) 3989 { 3990 /* 0x4000-0x4FFF: dock-related events */ 3991 *send_acpi_ev = true; 3992 *ignore_acpi_ev = false; 3993 3994 switch (hkey) { 3995 case TP_HKEY_EV_UNDOCK_ACK: 3996 /* ACPI undock operation completed after wakeup */ 3997 hotkey_autosleep_ack = 1; 3998 pr_info("undocked\n"); 3999 hotkey_wakeup_hotunplug_complete_notify_change(); 4000 return true; 4001 4002 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 4003 pr_info("docked into hotplug port replicator\n"); 4004 return true; 4005 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 4006 pr_info("undocked from hotplug port replicator\n"); 4007 return true; 4008 4009 default: 4010 return false; 4011 } 4012 } 4013 4014 static bool hotkey_notify_usrevent(const u32 hkey, 4015 bool *send_acpi_ev, 4016 bool *ignore_acpi_ev) 4017 { 4018 /* 0x5000-0x5FFF: human interface helpers */ 4019 *send_acpi_ev = true; 4020 *ignore_acpi_ev = false; 4021 4022 switch (hkey) { 4023 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 4024 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 4025 return true; 4026 4027 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 4028 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 4029 tpacpi_input_send_tabletsw(); 4030 hotkey_tablet_mode_notify_change(); 4031 *send_acpi_ev = false; 4032 return true; 4033 4034 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 4035 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 4036 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 4037 /* do not propagate these events */ 4038 *ignore_acpi_ev = true; 4039 return true; 4040 4041 default: 4042 return false; 4043 } 4044 } 4045 4046 static void thermal_dump_all_sensors(void); 4047 4048 static bool hotkey_notify_6xxx(const u32 hkey, 4049 bool *send_acpi_ev, 4050 bool *ignore_acpi_ev) 4051 { 4052 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 4053 *send_acpi_ev = true; 4054 *ignore_acpi_ev = false; 4055 4056 switch (hkey) { 4057 case TP_HKEY_EV_THM_TABLE_CHANGED: 4058 pr_debug("EC reports: Thermal Table has changed\n"); 4059 /* recommended action: do nothing, we don't have 4060 * Lenovo ATM information */ 4061 return true; 4062 case TP_HKEY_EV_THM_CSM_COMPLETED: 4063 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n"); 4064 /* recommended action: do nothing, we don't have 4065 * Lenovo ATM information */ 4066 return true; 4067 case TP_HKEY_EV_THM_TRANSFM_CHANGED: 4068 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n"); 4069 /* recommended action: do nothing, we don't have 4070 * Lenovo ATM information */ 4071 return true; 4072 case TP_HKEY_EV_ALARM_BAT_HOT: 4073 pr_crit("THERMAL ALARM: battery is too hot!\n"); 4074 /* recommended action: warn user through gui */ 4075 break; 4076 case TP_HKEY_EV_ALARM_BAT_XHOT: 4077 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 4078 /* recommended action: immediate sleep/hibernate */ 4079 break; 4080 case TP_HKEY_EV_ALARM_SENSOR_HOT: 4081 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n"); 4082 /* recommended action: warn user through gui, that */ 4083 /* some internal component is too hot */ 4084 break; 4085 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 4086 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n"); 4087 /* recommended action: immediate sleep/hibernate */ 4088 break; 4089 case TP_HKEY_EV_AC_CHANGED: 4090 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 4091 * AC status changed; can be triggered by plugging or 4092 * unplugging AC adapter, docking or undocking. */ 4093 4094 /* fallthrough */ 4095 4096 case TP_HKEY_EV_KEY_NUMLOCK: 4097 case TP_HKEY_EV_KEY_FN: 4098 case TP_HKEY_EV_KEY_FN_ESC: 4099 /* key press events, we just ignore them as long as the EC 4100 * is still reporting them in the normal keyboard stream */ 4101 *send_acpi_ev = false; 4102 *ignore_acpi_ev = true; 4103 return true; 4104 4105 case TP_HKEY_EV_TABLET_CHANGED: 4106 tpacpi_input_send_tabletsw(); 4107 hotkey_tablet_mode_notify_change(); 4108 *send_acpi_ev = false; 4109 return true; 4110 4111 case TP_HKEY_EV_PALM_DETECTED: 4112 case TP_HKEY_EV_PALM_UNDETECTED: 4113 /* palm detected hovering the keyboard, forward to user-space 4114 * via netlink for consumption */ 4115 return true; 4116 4117 default: 4118 /* report simply as unknown, no sensor dump */ 4119 return false; 4120 } 4121 4122 thermal_dump_all_sensors(); 4123 return true; 4124 } 4125 4126 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 4127 { 4128 u32 hkey; 4129 bool send_acpi_ev; 4130 bool ignore_acpi_ev; 4131 bool known_ev; 4132 4133 if (event != 0x80) { 4134 pr_err("unknown HKEY notification event %d\n", event); 4135 /* forward it to userspace, maybe it knows how to handle it */ 4136 acpi_bus_generate_netlink_event( 4137 ibm->acpi->device->pnp.device_class, 4138 dev_name(&ibm->acpi->device->dev), 4139 event, 0); 4140 return; 4141 } 4142 4143 while (1) { 4144 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 4145 pr_err("failed to retrieve HKEY event\n"); 4146 return; 4147 } 4148 4149 if (hkey == 0) { 4150 /* queue empty */ 4151 return; 4152 } 4153 4154 send_acpi_ev = true; 4155 ignore_acpi_ev = false; 4156 4157 switch (hkey >> 12) { 4158 case 1: 4159 /* 0x1000-0x1FFF: key presses */ 4160 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 4161 &ignore_acpi_ev); 4162 break; 4163 case 2: 4164 /* 0x2000-0x2FFF: Wakeup reason */ 4165 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 4166 &ignore_acpi_ev); 4167 break; 4168 case 3: 4169 /* 0x3000-0x3FFF: bay-related wakeups */ 4170 switch (hkey) { 4171 case TP_HKEY_EV_BAYEJ_ACK: 4172 hotkey_autosleep_ack = 1; 4173 pr_info("bay ejected\n"); 4174 hotkey_wakeup_hotunplug_complete_notify_change(); 4175 known_ev = true; 4176 break; 4177 case TP_HKEY_EV_OPTDRV_EJ: 4178 /* FIXME: kick libata if SATA link offline */ 4179 known_ev = true; 4180 break; 4181 default: 4182 known_ev = false; 4183 } 4184 break; 4185 case 4: 4186 /* 0x4000-0x4FFF: dock-related events */ 4187 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 4188 &ignore_acpi_ev); 4189 break; 4190 case 5: 4191 /* 0x5000-0x5FFF: human interface helpers */ 4192 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 4193 &ignore_acpi_ev); 4194 break; 4195 case 6: 4196 /* 0x6000-0x6FFF: thermal alarms/notices and 4197 * keyboard events */ 4198 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 4199 &ignore_acpi_ev); 4200 break; 4201 case 7: 4202 /* 0x7000-0x7FFF: misc */ 4203 if (tp_features.hotkey_wlsw && 4204 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 4205 tpacpi_send_radiosw_update(); 4206 send_acpi_ev = 0; 4207 known_ev = true; 4208 break; 4209 } 4210 /* fallthrough to default */ 4211 default: 4212 known_ev = false; 4213 } 4214 if (!known_ev) { 4215 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4216 pr_notice("please report the conditions when this event happened to %s\n", 4217 TPACPI_MAIL); 4218 } 4219 4220 /* netlink events */ 4221 if (!ignore_acpi_ev && send_acpi_ev) { 4222 acpi_bus_generate_netlink_event( 4223 ibm->acpi->device->pnp.device_class, 4224 dev_name(&ibm->acpi->device->dev), 4225 event, hkey); 4226 } 4227 } 4228 } 4229 4230 static void hotkey_suspend(void) 4231 { 4232 /* Do these on suspend, we get the events on early resume! */ 4233 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4234 hotkey_autosleep_ack = 0; 4235 4236 /* save previous mode of adaptive keyboard of X1 Carbon */ 4237 if (tp_features.has_adaptive_kbd) { 4238 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4239 "GTRW", "dd", 0)) { 4240 pr_err("Cannot read adaptive keyboard mode.\n"); 4241 } 4242 } 4243 } 4244 4245 static void hotkey_resume(void) 4246 { 4247 tpacpi_disable_brightness_delay(); 4248 4249 if (hotkey_status_set(true) < 0 || 4250 hotkey_mask_set(hotkey_acpi_mask) < 0) 4251 pr_err("error while attempting to reset the event firmware interface\n"); 4252 4253 tpacpi_send_radiosw_update(); 4254 hotkey_tablet_mode_notify_change(); 4255 hotkey_wakeup_reason_notify_change(); 4256 hotkey_wakeup_hotunplug_complete_notify_change(); 4257 hotkey_poll_setup_safe(false); 4258 4259 /* restore previous mode of adapive keyboard of X1 Carbon */ 4260 if (tp_features.has_adaptive_kbd) { 4261 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4262 adaptive_keyboard_prev_mode)) { 4263 pr_err("Cannot set adaptive keyboard mode.\n"); 4264 } 4265 } 4266 } 4267 4268 /* procfs -------------------------------------------------------------- */ 4269 static int hotkey_read(struct seq_file *m) 4270 { 4271 int res, status; 4272 4273 if (!tp_features.hotkey) { 4274 seq_printf(m, "status:\t\tnot supported\n"); 4275 return 0; 4276 } 4277 4278 if (mutex_lock_killable(&hotkey_mutex)) 4279 return -ERESTARTSYS; 4280 res = hotkey_status_get(&status); 4281 if (!res) 4282 res = hotkey_mask_get(); 4283 mutex_unlock(&hotkey_mutex); 4284 if (res) 4285 return res; 4286 4287 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4288 if (hotkey_all_mask) { 4289 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4290 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4291 } else { 4292 seq_printf(m, "mask:\t\tnot supported\n"); 4293 seq_printf(m, "commands:\tenable, disable, reset\n"); 4294 } 4295 4296 return 0; 4297 } 4298 4299 static void hotkey_enabledisable_warn(bool enable) 4300 { 4301 tpacpi_log_usertask("procfs hotkey enable/disable"); 4302 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4303 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n"))) 4304 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n"); 4305 } 4306 4307 static int hotkey_write(char *buf) 4308 { 4309 int res; 4310 u32 mask; 4311 char *cmd; 4312 4313 if (!tp_features.hotkey) 4314 return -ENODEV; 4315 4316 if (mutex_lock_killable(&hotkey_mutex)) 4317 return -ERESTARTSYS; 4318 4319 mask = hotkey_user_mask; 4320 4321 res = 0; 4322 while ((cmd = next_cmd(&buf))) { 4323 if (strlencmp(cmd, "enable") == 0) { 4324 hotkey_enabledisable_warn(1); 4325 } else if (strlencmp(cmd, "disable") == 0) { 4326 hotkey_enabledisable_warn(0); 4327 res = -EPERM; 4328 } else if (strlencmp(cmd, "reset") == 0) { 4329 mask = (hotkey_all_mask | hotkey_source_mask) 4330 & ~hotkey_reserved_mask; 4331 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4332 /* mask set */ 4333 } else if (sscanf(cmd, "%x", &mask) == 1) { 4334 /* mask set */ 4335 } else { 4336 res = -EINVAL; 4337 goto errexit; 4338 } 4339 } 4340 4341 if (!res) { 4342 tpacpi_disclose_usertask("procfs hotkey", 4343 "set mask to 0x%08x\n", mask); 4344 res = hotkey_user_mask_set(mask); 4345 } 4346 4347 errexit: 4348 mutex_unlock(&hotkey_mutex); 4349 return res; 4350 } 4351 4352 static const struct acpi_device_id ibm_htk_device_ids[] = { 4353 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4354 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4355 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0}, 4356 {"", 0}, 4357 }; 4358 4359 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4360 .hid = ibm_htk_device_ids, 4361 .notify = hotkey_notify, 4362 .handle = &hkey_handle, 4363 .type = ACPI_DEVICE_NOTIFY, 4364 }; 4365 4366 static struct ibm_struct hotkey_driver_data = { 4367 .name = "hotkey", 4368 .read = hotkey_read, 4369 .write = hotkey_write, 4370 .exit = hotkey_exit, 4371 .resume = hotkey_resume, 4372 .suspend = hotkey_suspend, 4373 .acpi = &ibm_hotkey_acpidriver, 4374 }; 4375 4376 /************************************************************************* 4377 * Bluetooth subdriver 4378 */ 4379 4380 enum { 4381 /* ACPI GBDC/SBDC bits */ 4382 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4383 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4384 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4385 0 = disable, 1 = enable */ 4386 }; 4387 4388 enum { 4389 /* ACPI \BLTH commands */ 4390 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4391 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4392 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4393 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4394 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4395 }; 4396 4397 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4398 4399 static int bluetooth_get_status(void) 4400 { 4401 int status; 4402 4403 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4404 if (dbg_bluetoothemul) 4405 return (tpacpi_bluetooth_emulstate) ? 4406 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4407 #endif 4408 4409 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4410 return -EIO; 4411 4412 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4413 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4414 } 4415 4416 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4417 { 4418 int status; 4419 4420 vdbg_printk(TPACPI_DBG_RFKILL, 4421 "will attempt to %s bluetooth\n", 4422 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4423 4424 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4425 if (dbg_bluetoothemul) { 4426 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4427 return 0; 4428 } 4429 #endif 4430 4431 if (state == TPACPI_RFK_RADIO_ON) 4432 status = TP_ACPI_BLUETOOTH_RADIOSSW 4433 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4434 else 4435 status = 0; 4436 4437 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4438 return -EIO; 4439 4440 return 0; 4441 } 4442 4443 /* sysfs bluetooth enable ---------------------------------------------- */ 4444 static ssize_t bluetooth_enable_show(struct device *dev, 4445 struct device_attribute *attr, 4446 char *buf) 4447 { 4448 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4449 attr, buf); 4450 } 4451 4452 static ssize_t bluetooth_enable_store(struct device *dev, 4453 struct device_attribute *attr, 4454 const char *buf, size_t count) 4455 { 4456 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4457 attr, buf, count); 4458 } 4459 4460 static DEVICE_ATTR_RW(bluetooth_enable); 4461 4462 /* --------------------------------------------------------------------- */ 4463 4464 static struct attribute *bluetooth_attributes[] = { 4465 &dev_attr_bluetooth_enable.attr, 4466 NULL 4467 }; 4468 4469 static const struct attribute_group bluetooth_attr_group = { 4470 .attrs = bluetooth_attributes, 4471 }; 4472 4473 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4474 .get_status = bluetooth_get_status, 4475 .set_status = bluetooth_set_status, 4476 }; 4477 4478 static void bluetooth_shutdown(void) 4479 { 4480 /* Order firmware to save current state to NVRAM */ 4481 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4482 TP_ACPI_BLTH_SAVE_STATE)) 4483 pr_notice("failed to save bluetooth state to NVRAM\n"); 4484 else 4485 vdbg_printk(TPACPI_DBG_RFKILL, 4486 "bluetooth state saved to NVRAM\n"); 4487 } 4488 4489 static void bluetooth_exit(void) 4490 { 4491 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4492 &bluetooth_attr_group); 4493 4494 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4495 4496 bluetooth_shutdown(); 4497 } 4498 4499 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4500 { 4501 int res; 4502 int status = 0; 4503 4504 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4505 "initializing bluetooth subdriver\n"); 4506 4507 TPACPI_ACPIHANDLE_INIT(hkey); 4508 4509 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4510 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4511 tp_features.bluetooth = hkey_handle && 4512 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4513 4514 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4515 "bluetooth is %s, status 0x%02x\n", 4516 str_supported(tp_features.bluetooth), 4517 status); 4518 4519 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4520 if (dbg_bluetoothemul) { 4521 tp_features.bluetooth = 1; 4522 pr_info("bluetooth switch emulation enabled\n"); 4523 } else 4524 #endif 4525 if (tp_features.bluetooth && 4526 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4527 /* no bluetooth hardware present in system */ 4528 tp_features.bluetooth = 0; 4529 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4530 "bluetooth hardware not installed\n"); 4531 } 4532 4533 if (!tp_features.bluetooth) 4534 return 1; 4535 4536 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4537 &bluetooth_tprfk_ops, 4538 RFKILL_TYPE_BLUETOOTH, 4539 TPACPI_RFK_BLUETOOTH_SW_NAME, 4540 true); 4541 if (res) 4542 return res; 4543 4544 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4545 &bluetooth_attr_group); 4546 if (res) { 4547 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4548 return res; 4549 } 4550 4551 return 0; 4552 } 4553 4554 /* procfs -------------------------------------------------------------- */ 4555 static int bluetooth_read(struct seq_file *m) 4556 { 4557 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4558 } 4559 4560 static int bluetooth_write(char *buf) 4561 { 4562 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4563 } 4564 4565 static struct ibm_struct bluetooth_driver_data = { 4566 .name = "bluetooth", 4567 .read = bluetooth_read, 4568 .write = bluetooth_write, 4569 .exit = bluetooth_exit, 4570 .shutdown = bluetooth_shutdown, 4571 }; 4572 4573 /************************************************************************* 4574 * Wan subdriver 4575 */ 4576 4577 enum { 4578 /* ACPI GWAN/SWAN bits */ 4579 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4580 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4581 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4582 0 = disable, 1 = enable */ 4583 }; 4584 4585 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4586 4587 static int wan_get_status(void) 4588 { 4589 int status; 4590 4591 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4592 if (dbg_wwanemul) 4593 return (tpacpi_wwan_emulstate) ? 4594 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4595 #endif 4596 4597 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4598 return -EIO; 4599 4600 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4601 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4602 } 4603 4604 static int wan_set_status(enum tpacpi_rfkill_state state) 4605 { 4606 int status; 4607 4608 vdbg_printk(TPACPI_DBG_RFKILL, 4609 "will attempt to %s wwan\n", 4610 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4611 4612 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4613 if (dbg_wwanemul) { 4614 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4615 return 0; 4616 } 4617 #endif 4618 4619 if (state == TPACPI_RFK_RADIO_ON) 4620 status = TP_ACPI_WANCARD_RADIOSSW 4621 | TP_ACPI_WANCARD_RESUMECTRL; 4622 else 4623 status = 0; 4624 4625 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4626 return -EIO; 4627 4628 return 0; 4629 } 4630 4631 /* sysfs wan enable ---------------------------------------------------- */ 4632 static ssize_t wan_enable_show(struct device *dev, 4633 struct device_attribute *attr, 4634 char *buf) 4635 { 4636 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4637 attr, buf); 4638 } 4639 4640 static ssize_t wan_enable_store(struct device *dev, 4641 struct device_attribute *attr, 4642 const char *buf, size_t count) 4643 { 4644 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4645 attr, buf, count); 4646 } 4647 4648 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4649 wan_enable_show, wan_enable_store); 4650 4651 /* --------------------------------------------------------------------- */ 4652 4653 static struct attribute *wan_attributes[] = { 4654 &dev_attr_wwan_enable.attr, 4655 NULL 4656 }; 4657 4658 static const struct attribute_group wan_attr_group = { 4659 .attrs = wan_attributes, 4660 }; 4661 4662 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4663 .get_status = wan_get_status, 4664 .set_status = wan_set_status, 4665 }; 4666 4667 static void wan_shutdown(void) 4668 { 4669 /* Order firmware to save current state to NVRAM */ 4670 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4671 TP_ACPI_WGSV_SAVE_STATE)) 4672 pr_notice("failed to save WWAN state to NVRAM\n"); 4673 else 4674 vdbg_printk(TPACPI_DBG_RFKILL, 4675 "WWAN state saved to NVRAM\n"); 4676 } 4677 4678 static void wan_exit(void) 4679 { 4680 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4681 &wan_attr_group); 4682 4683 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4684 4685 wan_shutdown(); 4686 } 4687 4688 static int __init wan_init(struct ibm_init_struct *iibm) 4689 { 4690 int res; 4691 int status = 0; 4692 4693 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4694 "initializing wan subdriver\n"); 4695 4696 TPACPI_ACPIHANDLE_INIT(hkey); 4697 4698 tp_features.wan = hkey_handle && 4699 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4700 4701 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4702 "wan is %s, status 0x%02x\n", 4703 str_supported(tp_features.wan), 4704 status); 4705 4706 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4707 if (dbg_wwanemul) { 4708 tp_features.wan = 1; 4709 pr_info("wwan switch emulation enabled\n"); 4710 } else 4711 #endif 4712 if (tp_features.wan && 4713 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4714 /* no wan hardware present in system */ 4715 tp_features.wan = 0; 4716 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4717 "wan hardware not installed\n"); 4718 } 4719 4720 if (!tp_features.wan) 4721 return 1; 4722 4723 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4724 &wan_tprfk_ops, 4725 RFKILL_TYPE_WWAN, 4726 TPACPI_RFK_WWAN_SW_NAME, 4727 true); 4728 if (res) 4729 return res; 4730 4731 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4732 &wan_attr_group); 4733 4734 if (res) { 4735 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4736 return res; 4737 } 4738 4739 return 0; 4740 } 4741 4742 /* procfs -------------------------------------------------------------- */ 4743 static int wan_read(struct seq_file *m) 4744 { 4745 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4746 } 4747 4748 static int wan_write(char *buf) 4749 { 4750 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4751 } 4752 4753 static struct ibm_struct wan_driver_data = { 4754 .name = "wan", 4755 .read = wan_read, 4756 .write = wan_write, 4757 .exit = wan_exit, 4758 .shutdown = wan_shutdown, 4759 }; 4760 4761 /************************************************************************* 4762 * UWB subdriver 4763 */ 4764 4765 enum { 4766 /* ACPI GUWB/SUWB bits */ 4767 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4768 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4769 }; 4770 4771 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4772 4773 static int uwb_get_status(void) 4774 { 4775 int status; 4776 4777 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4778 if (dbg_uwbemul) 4779 return (tpacpi_uwb_emulstate) ? 4780 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4781 #endif 4782 4783 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4784 return -EIO; 4785 4786 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4787 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4788 } 4789 4790 static int uwb_set_status(enum tpacpi_rfkill_state state) 4791 { 4792 int status; 4793 4794 vdbg_printk(TPACPI_DBG_RFKILL, 4795 "will attempt to %s UWB\n", 4796 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4797 4798 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4799 if (dbg_uwbemul) { 4800 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4801 return 0; 4802 } 4803 #endif 4804 4805 if (state == TPACPI_RFK_RADIO_ON) 4806 status = TP_ACPI_UWB_RADIOSSW; 4807 else 4808 status = 0; 4809 4810 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4811 return -EIO; 4812 4813 return 0; 4814 } 4815 4816 /* --------------------------------------------------------------------- */ 4817 4818 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4819 .get_status = uwb_get_status, 4820 .set_status = uwb_set_status, 4821 }; 4822 4823 static void uwb_exit(void) 4824 { 4825 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4826 } 4827 4828 static int __init uwb_init(struct ibm_init_struct *iibm) 4829 { 4830 int res; 4831 int status = 0; 4832 4833 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4834 "initializing uwb subdriver\n"); 4835 4836 TPACPI_ACPIHANDLE_INIT(hkey); 4837 4838 tp_features.uwb = hkey_handle && 4839 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4840 4841 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4842 "uwb is %s, status 0x%02x\n", 4843 str_supported(tp_features.uwb), 4844 status); 4845 4846 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4847 if (dbg_uwbemul) { 4848 tp_features.uwb = 1; 4849 pr_info("uwb switch emulation enabled\n"); 4850 } else 4851 #endif 4852 if (tp_features.uwb && 4853 !(status & TP_ACPI_UWB_HWPRESENT)) { 4854 /* no uwb hardware present in system */ 4855 tp_features.uwb = 0; 4856 dbg_printk(TPACPI_DBG_INIT, 4857 "uwb hardware not installed\n"); 4858 } 4859 4860 if (!tp_features.uwb) 4861 return 1; 4862 4863 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4864 &uwb_tprfk_ops, 4865 RFKILL_TYPE_UWB, 4866 TPACPI_RFK_UWB_SW_NAME, 4867 false); 4868 return res; 4869 } 4870 4871 static struct ibm_struct uwb_driver_data = { 4872 .name = "uwb", 4873 .exit = uwb_exit, 4874 .flags.experimental = 1, 4875 }; 4876 4877 /************************************************************************* 4878 * Video subdriver 4879 */ 4880 4881 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4882 4883 enum video_access_mode { 4884 TPACPI_VIDEO_NONE = 0, 4885 TPACPI_VIDEO_570, /* 570 */ 4886 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4887 TPACPI_VIDEO_NEW, /* all others */ 4888 }; 4889 4890 enum { /* video status flags, based on VIDEO_570 */ 4891 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4892 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4893 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4894 }; 4895 4896 enum { /* TPACPI_VIDEO_570 constants */ 4897 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4898 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4899 * video_status_flags */ 4900 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4901 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4902 }; 4903 4904 static enum video_access_mode video_supported; 4905 static int video_orig_autosw; 4906 4907 static int video_autosw_get(void); 4908 static int video_autosw_set(int enable); 4909 4910 TPACPI_HANDLE(vid, root, 4911 "\\_SB.PCI.AGP.VGA", /* 570 */ 4912 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4913 "\\_SB.PCI0.VID0", /* 770e */ 4914 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4915 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4916 "\\_SB.PCI0.AGP.VID", /* all others */ 4917 ); /* R30, R31 */ 4918 4919 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4920 4921 static int __init video_init(struct ibm_init_struct *iibm) 4922 { 4923 int ivga; 4924 4925 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4926 4927 TPACPI_ACPIHANDLE_INIT(vid); 4928 if (tpacpi_is_ibm()) 4929 TPACPI_ACPIHANDLE_INIT(vid2); 4930 4931 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4932 /* G41, assume IVGA doesn't change */ 4933 vid_handle = vid2_handle; 4934 4935 if (!vid_handle) 4936 /* video switching not supported on R30, R31 */ 4937 video_supported = TPACPI_VIDEO_NONE; 4938 else if (tpacpi_is_ibm() && 4939 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4940 /* 570 */ 4941 video_supported = TPACPI_VIDEO_570; 4942 else if (tpacpi_is_ibm() && 4943 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4944 /* 600e/x, 770e, 770x */ 4945 video_supported = TPACPI_VIDEO_770; 4946 else 4947 /* all others */ 4948 video_supported = TPACPI_VIDEO_NEW; 4949 4950 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4951 str_supported(video_supported != TPACPI_VIDEO_NONE), 4952 video_supported); 4953 4954 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 4955 } 4956 4957 static void video_exit(void) 4958 { 4959 dbg_printk(TPACPI_DBG_EXIT, 4960 "restoring original video autoswitch mode\n"); 4961 if (video_autosw_set(video_orig_autosw)) 4962 pr_err("error while trying to restore original video autoswitch mode\n"); 4963 } 4964 4965 static int video_outputsw_get(void) 4966 { 4967 int status = 0; 4968 int i; 4969 4970 switch (video_supported) { 4971 case TPACPI_VIDEO_570: 4972 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4973 TP_ACPI_VIDEO_570_PHSCMD)) 4974 return -EIO; 4975 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4976 break; 4977 case TPACPI_VIDEO_770: 4978 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4979 return -EIO; 4980 if (i) 4981 status |= TP_ACPI_VIDEO_S_LCD; 4982 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4983 return -EIO; 4984 if (i) 4985 status |= TP_ACPI_VIDEO_S_CRT; 4986 break; 4987 case TPACPI_VIDEO_NEW: 4988 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4989 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4990 return -EIO; 4991 if (i) 4992 status |= TP_ACPI_VIDEO_S_CRT; 4993 4994 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4995 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4996 return -EIO; 4997 if (i) 4998 status |= TP_ACPI_VIDEO_S_LCD; 4999 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 5000 return -EIO; 5001 if (i) 5002 status |= TP_ACPI_VIDEO_S_DVI; 5003 break; 5004 default: 5005 return -ENOSYS; 5006 } 5007 5008 return status; 5009 } 5010 5011 static int video_outputsw_set(int status) 5012 { 5013 int autosw; 5014 int res = 0; 5015 5016 switch (video_supported) { 5017 case TPACPI_VIDEO_570: 5018 res = acpi_evalf(NULL, NULL, 5019 "\\_SB.PHS2", "vdd", 5020 TP_ACPI_VIDEO_570_PHS2CMD, 5021 status | TP_ACPI_VIDEO_570_PHS2SET); 5022 break; 5023 case TPACPI_VIDEO_770: 5024 autosw = video_autosw_get(); 5025 if (autosw < 0) 5026 return autosw; 5027 5028 res = video_autosw_set(1); 5029 if (res) 5030 return res; 5031 res = acpi_evalf(vid_handle, NULL, 5032 "ASWT", "vdd", status * 0x100, 0); 5033 if (!autosw && video_autosw_set(autosw)) { 5034 pr_err("video auto-switch left enabled due to error\n"); 5035 return -EIO; 5036 } 5037 break; 5038 case TPACPI_VIDEO_NEW: 5039 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 5040 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 5041 break; 5042 default: 5043 return -ENOSYS; 5044 } 5045 5046 return (res) ? 0 : -EIO; 5047 } 5048 5049 static int video_autosw_get(void) 5050 { 5051 int autosw = 0; 5052 5053 switch (video_supported) { 5054 case TPACPI_VIDEO_570: 5055 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 5056 return -EIO; 5057 break; 5058 case TPACPI_VIDEO_770: 5059 case TPACPI_VIDEO_NEW: 5060 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 5061 return -EIO; 5062 break; 5063 default: 5064 return -ENOSYS; 5065 } 5066 5067 return autosw & 1; 5068 } 5069 5070 static int video_autosw_set(int enable) 5071 { 5072 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 5073 return -EIO; 5074 return 0; 5075 } 5076 5077 static int video_outputsw_cycle(void) 5078 { 5079 int autosw = video_autosw_get(); 5080 int res; 5081 5082 if (autosw < 0) 5083 return autosw; 5084 5085 switch (video_supported) { 5086 case TPACPI_VIDEO_570: 5087 res = video_autosw_set(1); 5088 if (res) 5089 return res; 5090 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 5091 break; 5092 case TPACPI_VIDEO_770: 5093 case TPACPI_VIDEO_NEW: 5094 res = video_autosw_set(1); 5095 if (res) 5096 return res; 5097 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 5098 break; 5099 default: 5100 return -ENOSYS; 5101 } 5102 if (!autosw && video_autosw_set(autosw)) { 5103 pr_err("video auto-switch left enabled due to error\n"); 5104 return -EIO; 5105 } 5106 5107 return (res) ? 0 : -EIO; 5108 } 5109 5110 static int video_expand_toggle(void) 5111 { 5112 switch (video_supported) { 5113 case TPACPI_VIDEO_570: 5114 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 5115 0 : -EIO; 5116 case TPACPI_VIDEO_770: 5117 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 5118 0 : -EIO; 5119 case TPACPI_VIDEO_NEW: 5120 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 5121 0 : -EIO; 5122 default: 5123 return -ENOSYS; 5124 } 5125 /* not reached */ 5126 } 5127 5128 static int video_read(struct seq_file *m) 5129 { 5130 int status, autosw; 5131 5132 if (video_supported == TPACPI_VIDEO_NONE) { 5133 seq_printf(m, "status:\t\tnot supported\n"); 5134 return 0; 5135 } 5136 5137 /* Even reads can crash X.org, so... */ 5138 if (!capable(CAP_SYS_ADMIN)) 5139 return -EPERM; 5140 5141 status = video_outputsw_get(); 5142 if (status < 0) 5143 return status; 5144 5145 autosw = video_autosw_get(); 5146 if (autosw < 0) 5147 return autosw; 5148 5149 seq_printf(m, "status:\t\tsupported\n"); 5150 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 5151 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 5152 if (video_supported == TPACPI_VIDEO_NEW) 5153 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 5154 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 5155 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5156 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5157 if (video_supported == TPACPI_VIDEO_NEW) 5158 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5159 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5160 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5161 5162 return 0; 5163 } 5164 5165 static int video_write(char *buf) 5166 { 5167 char *cmd; 5168 int enable, disable, status; 5169 int res; 5170 5171 if (video_supported == TPACPI_VIDEO_NONE) 5172 return -ENODEV; 5173 5174 /* Even reads can crash X.org, let alone writes... */ 5175 if (!capable(CAP_SYS_ADMIN)) 5176 return -EPERM; 5177 5178 enable = 0; 5179 disable = 0; 5180 5181 while ((cmd = next_cmd(&buf))) { 5182 if (strlencmp(cmd, "lcd_enable") == 0) { 5183 enable |= TP_ACPI_VIDEO_S_LCD; 5184 } else if (strlencmp(cmd, "lcd_disable") == 0) { 5185 disable |= TP_ACPI_VIDEO_S_LCD; 5186 } else if (strlencmp(cmd, "crt_enable") == 0) { 5187 enable |= TP_ACPI_VIDEO_S_CRT; 5188 } else if (strlencmp(cmd, "crt_disable") == 0) { 5189 disable |= TP_ACPI_VIDEO_S_CRT; 5190 } else if (video_supported == TPACPI_VIDEO_NEW && 5191 strlencmp(cmd, "dvi_enable") == 0) { 5192 enable |= TP_ACPI_VIDEO_S_DVI; 5193 } else if (video_supported == TPACPI_VIDEO_NEW && 5194 strlencmp(cmd, "dvi_disable") == 0) { 5195 disable |= TP_ACPI_VIDEO_S_DVI; 5196 } else if (strlencmp(cmd, "auto_enable") == 0) { 5197 res = video_autosw_set(1); 5198 if (res) 5199 return res; 5200 } else if (strlencmp(cmd, "auto_disable") == 0) { 5201 res = video_autosw_set(0); 5202 if (res) 5203 return res; 5204 } else if (strlencmp(cmd, "video_switch") == 0) { 5205 res = video_outputsw_cycle(); 5206 if (res) 5207 return res; 5208 } else if (strlencmp(cmd, "expand_toggle") == 0) { 5209 res = video_expand_toggle(); 5210 if (res) 5211 return res; 5212 } else 5213 return -EINVAL; 5214 } 5215 5216 if (enable || disable) { 5217 status = video_outputsw_get(); 5218 if (status < 0) 5219 return status; 5220 res = video_outputsw_set((status & ~disable) | enable); 5221 if (res) 5222 return res; 5223 } 5224 5225 return 0; 5226 } 5227 5228 static struct ibm_struct video_driver_data = { 5229 .name = "video", 5230 .read = video_read, 5231 .write = video_write, 5232 .exit = video_exit, 5233 }; 5234 5235 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5236 5237 /************************************************************************* 5238 * Keyboard backlight subdriver 5239 */ 5240 5241 static enum led_brightness kbdlight_brightness; 5242 static DEFINE_MUTEX(kbdlight_mutex); 5243 5244 static int kbdlight_set_level(int level) 5245 { 5246 int ret = 0; 5247 5248 if (!hkey_handle) 5249 return -ENXIO; 5250 5251 mutex_lock(&kbdlight_mutex); 5252 5253 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5254 ret = -EIO; 5255 else 5256 kbdlight_brightness = level; 5257 5258 mutex_unlock(&kbdlight_mutex); 5259 5260 return ret; 5261 } 5262 5263 static int kbdlight_get_level(void) 5264 { 5265 int status = 0; 5266 5267 if (!hkey_handle) 5268 return -ENXIO; 5269 5270 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5271 return -EIO; 5272 5273 if (status < 0) 5274 return status; 5275 5276 return status & 0x3; 5277 } 5278 5279 static bool kbdlight_is_supported(void) 5280 { 5281 int status = 0; 5282 5283 if (!hkey_handle) 5284 return false; 5285 5286 if (!acpi_has_method(hkey_handle, "MLCG")) { 5287 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5288 return false; 5289 } 5290 5291 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5292 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5293 return false; 5294 } 5295 5296 if (status < 0) { 5297 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5298 return false; 5299 } 5300 5301 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5302 /* 5303 * Guessed test for keyboard backlight: 5304 * 5305 * Machines with backlight keyboard return: 5306 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5307 * b110100010010000000XX - ThinkPad x230 5308 * b010100000010000000XX - ThinkPad x240 5309 * b010100000010000000XX - ThinkPad W541 5310 * (XX is current backlight level) 5311 * 5312 * Machines without backlight keyboard return: 5313 * b10100001000000000000 - ThinkPad x230 5314 * b10110001000000000000 - ThinkPad E430 5315 * b00000000000000000000 - ThinkPad E450 5316 * 5317 * Candidate BITs for detection test (XOR): 5318 * b01000000001000000000 5319 * ^ 5320 */ 5321 return status & BIT(9); 5322 } 5323 5324 static int kbdlight_sysfs_set(struct led_classdev *led_cdev, 5325 enum led_brightness brightness) 5326 { 5327 return kbdlight_set_level(brightness); 5328 } 5329 5330 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5331 { 5332 int level; 5333 5334 level = kbdlight_get_level(); 5335 if (level < 0) 5336 return 0; 5337 5338 return level; 5339 } 5340 5341 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5342 .led_classdev = { 5343 .name = "tpacpi::kbd_backlight", 5344 .max_brightness = 2, 5345 .flags = LED_BRIGHT_HW_CHANGED, 5346 .brightness_set_blocking = &kbdlight_sysfs_set, 5347 .brightness_get = &kbdlight_sysfs_get, 5348 } 5349 }; 5350 5351 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5352 { 5353 int rc; 5354 5355 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5356 5357 TPACPI_ACPIHANDLE_INIT(hkey); 5358 5359 if (!kbdlight_is_supported()) { 5360 tp_features.kbdlight = 0; 5361 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5362 return 1; 5363 } 5364 5365 kbdlight_brightness = kbdlight_sysfs_get(NULL); 5366 tp_features.kbdlight = 1; 5367 5368 rc = led_classdev_register(&tpacpi_pdev->dev, 5369 &tpacpi_led_kbdlight.led_classdev); 5370 if (rc < 0) { 5371 tp_features.kbdlight = 0; 5372 return rc; 5373 } 5374 5375 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask | 5376 TP_ACPI_HKEY_KBD_LIGHT_MASK); 5377 return 0; 5378 } 5379 5380 static void kbdlight_exit(void) 5381 { 5382 if (tp_features.kbdlight) 5383 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5384 } 5385 5386 static int kbdlight_set_level_and_update(int level) 5387 { 5388 int ret; 5389 struct led_classdev *led_cdev; 5390 5391 ret = kbdlight_set_level(level); 5392 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5393 5394 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5395 led_cdev->brightness = level; 5396 5397 return ret; 5398 } 5399 5400 static int kbdlight_read(struct seq_file *m) 5401 { 5402 int level; 5403 5404 if (!tp_features.kbdlight) { 5405 seq_printf(m, "status:\t\tnot supported\n"); 5406 } else { 5407 level = kbdlight_get_level(); 5408 if (level < 0) 5409 seq_printf(m, "status:\t\terror %d\n", level); 5410 else 5411 seq_printf(m, "status:\t\t%d\n", level); 5412 seq_printf(m, "commands:\t0, 1, 2\n"); 5413 } 5414 5415 return 0; 5416 } 5417 5418 static int kbdlight_write(char *buf) 5419 { 5420 char *cmd; 5421 int level = -1; 5422 5423 if (!tp_features.kbdlight) 5424 return -ENODEV; 5425 5426 while ((cmd = next_cmd(&buf))) { 5427 if (strlencmp(cmd, "0") == 0) 5428 level = 0; 5429 else if (strlencmp(cmd, "1") == 0) 5430 level = 1; 5431 else if (strlencmp(cmd, "2") == 0) 5432 level = 2; 5433 else 5434 return -EINVAL; 5435 } 5436 5437 if (level == -1) 5438 return -EINVAL; 5439 5440 return kbdlight_set_level_and_update(level); 5441 } 5442 5443 static void kbdlight_suspend(void) 5444 { 5445 struct led_classdev *led_cdev; 5446 5447 if (!tp_features.kbdlight) 5448 return; 5449 5450 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5451 led_update_brightness(led_cdev); 5452 led_classdev_suspend(led_cdev); 5453 } 5454 5455 static void kbdlight_resume(void) 5456 { 5457 if (!tp_features.kbdlight) 5458 return; 5459 5460 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5461 } 5462 5463 static struct ibm_struct kbdlight_driver_data = { 5464 .name = "kbdlight", 5465 .read = kbdlight_read, 5466 .write = kbdlight_write, 5467 .suspend = kbdlight_suspend, 5468 .resume = kbdlight_resume, 5469 .exit = kbdlight_exit, 5470 }; 5471 5472 /************************************************************************* 5473 * Light (thinklight) subdriver 5474 */ 5475 5476 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5477 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5478 5479 static int light_get_status(void) 5480 { 5481 int status = 0; 5482 5483 if (tp_features.light_status) { 5484 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5485 return -EIO; 5486 return (!!status); 5487 } 5488 5489 return -ENXIO; 5490 } 5491 5492 static int light_set_status(int status) 5493 { 5494 int rc; 5495 5496 if (tp_features.light) { 5497 if (cmos_handle) { 5498 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5499 (status) ? 5500 TP_CMOS_THINKLIGHT_ON : 5501 TP_CMOS_THINKLIGHT_OFF); 5502 } else { 5503 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5504 (status) ? 1 : 0); 5505 } 5506 return (rc) ? 0 : -EIO; 5507 } 5508 5509 return -ENXIO; 5510 } 5511 5512 static int light_sysfs_set(struct led_classdev *led_cdev, 5513 enum led_brightness brightness) 5514 { 5515 return light_set_status((brightness != LED_OFF) ? 5516 TPACPI_LED_ON : TPACPI_LED_OFF); 5517 } 5518 5519 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5520 { 5521 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5522 } 5523 5524 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5525 .led_classdev = { 5526 .name = "tpacpi::thinklight", 5527 .brightness_set_blocking = &light_sysfs_set, 5528 .brightness_get = &light_sysfs_get, 5529 } 5530 }; 5531 5532 static int __init light_init(struct ibm_init_struct *iibm) 5533 { 5534 int rc; 5535 5536 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5537 5538 if (tpacpi_is_ibm()) { 5539 TPACPI_ACPIHANDLE_INIT(ledb); 5540 TPACPI_ACPIHANDLE_INIT(lght); 5541 } 5542 TPACPI_ACPIHANDLE_INIT(cmos); 5543 5544 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5545 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5546 5547 if (tp_features.light) 5548 /* light status not supported on 5549 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5550 tp_features.light_status = 5551 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5552 5553 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5554 str_supported(tp_features.light), 5555 str_supported(tp_features.light_status)); 5556 5557 if (!tp_features.light) 5558 return 1; 5559 5560 rc = led_classdev_register(&tpacpi_pdev->dev, 5561 &tpacpi_led_thinklight.led_classdev); 5562 5563 if (rc < 0) { 5564 tp_features.light = 0; 5565 tp_features.light_status = 0; 5566 } else { 5567 rc = 0; 5568 } 5569 5570 return rc; 5571 } 5572 5573 static void light_exit(void) 5574 { 5575 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5576 } 5577 5578 static int light_read(struct seq_file *m) 5579 { 5580 int status; 5581 5582 if (!tp_features.light) { 5583 seq_printf(m, "status:\t\tnot supported\n"); 5584 } else if (!tp_features.light_status) { 5585 seq_printf(m, "status:\t\tunknown\n"); 5586 seq_printf(m, "commands:\ton, off\n"); 5587 } else { 5588 status = light_get_status(); 5589 if (status < 0) 5590 return status; 5591 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5592 seq_printf(m, "commands:\ton, off\n"); 5593 } 5594 5595 return 0; 5596 } 5597 5598 static int light_write(char *buf) 5599 { 5600 char *cmd; 5601 int newstatus = 0; 5602 5603 if (!tp_features.light) 5604 return -ENODEV; 5605 5606 while ((cmd = next_cmd(&buf))) { 5607 if (strlencmp(cmd, "on") == 0) { 5608 newstatus = 1; 5609 } else if (strlencmp(cmd, "off") == 0) { 5610 newstatus = 0; 5611 } else 5612 return -EINVAL; 5613 } 5614 5615 return light_set_status(newstatus); 5616 } 5617 5618 static struct ibm_struct light_driver_data = { 5619 .name = "light", 5620 .read = light_read, 5621 .write = light_write, 5622 .exit = light_exit, 5623 }; 5624 5625 /************************************************************************* 5626 * CMOS subdriver 5627 */ 5628 5629 /* sysfs cmos_command -------------------------------------------------- */ 5630 static ssize_t cmos_command_store(struct device *dev, 5631 struct device_attribute *attr, 5632 const char *buf, size_t count) 5633 { 5634 unsigned long cmos_cmd; 5635 int res; 5636 5637 if (parse_strtoul(buf, 21, &cmos_cmd)) 5638 return -EINVAL; 5639 5640 res = issue_thinkpad_cmos_command(cmos_cmd); 5641 return (res) ? res : count; 5642 } 5643 5644 static DEVICE_ATTR_WO(cmos_command); 5645 5646 /* --------------------------------------------------------------------- */ 5647 5648 static int __init cmos_init(struct ibm_init_struct *iibm) 5649 { 5650 int res; 5651 5652 vdbg_printk(TPACPI_DBG_INIT, 5653 "initializing cmos commands subdriver\n"); 5654 5655 TPACPI_ACPIHANDLE_INIT(cmos); 5656 5657 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5658 str_supported(cmos_handle != NULL)); 5659 5660 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5661 if (res) 5662 return res; 5663 5664 return (cmos_handle) ? 0 : 1; 5665 } 5666 5667 static void cmos_exit(void) 5668 { 5669 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5670 } 5671 5672 static int cmos_read(struct seq_file *m) 5673 { 5674 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5675 R30, R31, T20-22, X20-21 */ 5676 if (!cmos_handle) 5677 seq_printf(m, "status:\t\tnot supported\n"); 5678 else { 5679 seq_printf(m, "status:\t\tsupported\n"); 5680 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5681 } 5682 5683 return 0; 5684 } 5685 5686 static int cmos_write(char *buf) 5687 { 5688 char *cmd; 5689 int cmos_cmd, res; 5690 5691 while ((cmd = next_cmd(&buf))) { 5692 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5693 cmos_cmd >= 0 && cmos_cmd <= 21) { 5694 /* cmos_cmd set */ 5695 } else 5696 return -EINVAL; 5697 5698 res = issue_thinkpad_cmos_command(cmos_cmd); 5699 if (res) 5700 return res; 5701 } 5702 5703 return 0; 5704 } 5705 5706 static struct ibm_struct cmos_driver_data = { 5707 .name = "cmos", 5708 .read = cmos_read, 5709 .write = cmos_write, 5710 .exit = cmos_exit, 5711 }; 5712 5713 /************************************************************************* 5714 * LED subdriver 5715 */ 5716 5717 enum led_access_mode { 5718 TPACPI_LED_NONE = 0, 5719 TPACPI_LED_570, /* 570 */ 5720 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5721 TPACPI_LED_NEW, /* all others */ 5722 }; 5723 5724 enum { /* For TPACPI_LED_OLD */ 5725 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5726 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5727 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5728 }; 5729 5730 static enum led_access_mode led_supported; 5731 5732 static acpi_handle led_handle; 5733 5734 #define TPACPI_LED_NUMLEDS 16 5735 static struct tpacpi_led_classdev *tpacpi_leds; 5736 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5737 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5738 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5739 "tpacpi::power", 5740 "tpacpi:orange:batt", 5741 "tpacpi:green:batt", 5742 "tpacpi::dock_active", 5743 "tpacpi::bay_active", 5744 "tpacpi::dock_batt", 5745 "tpacpi::unknown_led", 5746 "tpacpi::standby", 5747 "tpacpi::dock_status1", 5748 "tpacpi::dock_status2", 5749 "tpacpi::unknown_led2", 5750 "tpacpi::unknown_led3", 5751 "tpacpi::thinkvantage", 5752 }; 5753 #define TPACPI_SAFE_LEDS 0x1081U 5754 5755 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5756 { 5757 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5758 return false; 5759 #else 5760 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5761 #endif 5762 } 5763 5764 static int led_get_status(const unsigned int led) 5765 { 5766 int status; 5767 enum led_status_t led_s; 5768 5769 switch (led_supported) { 5770 case TPACPI_LED_570: 5771 if (!acpi_evalf(ec_handle, 5772 &status, "GLED", "dd", 1 << led)) 5773 return -EIO; 5774 led_s = (status == 0) ? 5775 TPACPI_LED_OFF : 5776 ((status == 1) ? 5777 TPACPI_LED_ON : 5778 TPACPI_LED_BLINK); 5779 tpacpi_led_state_cache[led] = led_s; 5780 return led_s; 5781 default: 5782 return -ENXIO; 5783 } 5784 5785 /* not reached */ 5786 } 5787 5788 static int led_set_status(const unsigned int led, 5789 const enum led_status_t ledstatus) 5790 { 5791 /* off, on, blink. Index is led_status_t */ 5792 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5793 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5794 5795 int rc = 0; 5796 5797 switch (led_supported) { 5798 case TPACPI_LED_570: 5799 /* 570 */ 5800 if (unlikely(led > 7)) 5801 return -EINVAL; 5802 if (unlikely(tpacpi_is_led_restricted(led))) 5803 return -EPERM; 5804 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5805 (1 << led), led_sled_arg1[ledstatus])) 5806 rc = -EIO; 5807 break; 5808 case TPACPI_LED_OLD: 5809 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5810 if (unlikely(led > 7)) 5811 return -EINVAL; 5812 if (unlikely(tpacpi_is_led_restricted(led))) 5813 return -EPERM; 5814 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5815 if (rc >= 0) 5816 rc = ec_write(TPACPI_LED_EC_HLBL, 5817 (ledstatus == TPACPI_LED_BLINK) << led); 5818 if (rc >= 0) 5819 rc = ec_write(TPACPI_LED_EC_HLCL, 5820 (ledstatus != TPACPI_LED_OFF) << led); 5821 break; 5822 case TPACPI_LED_NEW: 5823 /* all others */ 5824 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5825 return -EINVAL; 5826 if (unlikely(tpacpi_is_led_restricted(led))) 5827 return -EPERM; 5828 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5829 led, led_led_arg1[ledstatus])) 5830 rc = -EIO; 5831 break; 5832 default: 5833 rc = -ENXIO; 5834 } 5835 5836 if (!rc) 5837 tpacpi_led_state_cache[led] = ledstatus; 5838 5839 return rc; 5840 } 5841 5842 static int led_sysfs_set(struct led_classdev *led_cdev, 5843 enum led_brightness brightness) 5844 { 5845 struct tpacpi_led_classdev *data = container_of(led_cdev, 5846 struct tpacpi_led_classdev, led_classdev); 5847 enum led_status_t new_state; 5848 5849 if (brightness == LED_OFF) 5850 new_state = TPACPI_LED_OFF; 5851 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5852 new_state = TPACPI_LED_ON; 5853 else 5854 new_state = TPACPI_LED_BLINK; 5855 5856 return led_set_status(data->led, new_state); 5857 } 5858 5859 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5860 unsigned long *delay_on, unsigned long *delay_off) 5861 { 5862 struct tpacpi_led_classdev *data = container_of(led_cdev, 5863 struct tpacpi_led_classdev, led_classdev); 5864 5865 /* Can we choose the flash rate? */ 5866 if (*delay_on == 0 && *delay_off == 0) { 5867 /* yes. set them to the hardware blink rate (1 Hz) */ 5868 *delay_on = 500; /* ms */ 5869 *delay_off = 500; /* ms */ 5870 } else if ((*delay_on != 500) || (*delay_off != 500)) 5871 return -EINVAL; 5872 5873 return led_set_status(data->led, TPACPI_LED_BLINK); 5874 } 5875 5876 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5877 { 5878 int rc; 5879 5880 struct tpacpi_led_classdev *data = container_of(led_cdev, 5881 struct tpacpi_led_classdev, led_classdev); 5882 5883 rc = led_get_status(data->led); 5884 5885 if (rc == TPACPI_LED_OFF || rc < 0) 5886 rc = LED_OFF; /* no error handling in led class :( */ 5887 else 5888 rc = LED_FULL; 5889 5890 return rc; 5891 } 5892 5893 static void led_exit(void) 5894 { 5895 unsigned int i; 5896 5897 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5898 if (tpacpi_leds[i].led_classdev.name) 5899 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5900 } 5901 5902 kfree(tpacpi_leds); 5903 } 5904 5905 static int __init tpacpi_init_led(unsigned int led) 5906 { 5907 int rc; 5908 5909 tpacpi_leds[led].led = led; 5910 5911 /* LEDs with no name don't get registered */ 5912 if (!tpacpi_led_names[led]) 5913 return 0; 5914 5915 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set; 5916 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5917 if (led_supported == TPACPI_LED_570) 5918 tpacpi_leds[led].led_classdev.brightness_get = 5919 &led_sysfs_get; 5920 5921 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5922 5923 rc = led_classdev_register(&tpacpi_pdev->dev, 5924 &tpacpi_leds[led].led_classdev); 5925 if (rc < 0) 5926 tpacpi_leds[led].led_classdev.name = NULL; 5927 5928 return rc; 5929 } 5930 5931 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5932 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5933 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5934 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5935 5936 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5937 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5938 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5939 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5940 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5941 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5942 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5943 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5944 5945 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5946 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5947 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5948 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5949 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5950 5951 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5952 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5953 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5954 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5955 5956 /* (1) - may have excess leds enabled on MSB */ 5957 5958 /* Defaults (order matters, keep last, don't reorder!) */ 5959 { /* Lenovo */ 5960 .vendor = PCI_VENDOR_ID_LENOVO, 5961 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5962 .quirks = 0x1fffU, 5963 }, 5964 { /* IBM ThinkPads with no EC version string */ 5965 .vendor = PCI_VENDOR_ID_IBM, 5966 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5967 .quirks = 0x00ffU, 5968 }, 5969 { /* IBM ThinkPads with EC version string */ 5970 .vendor = PCI_VENDOR_ID_IBM, 5971 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5972 .quirks = 0x00bfU, 5973 }, 5974 }; 5975 5976 #undef TPACPI_LEDQ_IBM 5977 #undef TPACPI_LEDQ_LNV 5978 5979 static enum led_access_mode __init led_init_detect_mode(void) 5980 { 5981 acpi_status status; 5982 5983 if (tpacpi_is_ibm()) { 5984 /* 570 */ 5985 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5986 if (ACPI_SUCCESS(status)) 5987 return TPACPI_LED_570; 5988 5989 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5990 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5991 if (ACPI_SUCCESS(status)) 5992 return TPACPI_LED_OLD; 5993 } 5994 5995 /* most others */ 5996 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5997 if (ACPI_SUCCESS(status)) 5998 return TPACPI_LED_NEW; 5999 6000 /* R30, R31, and unknown firmwares */ 6001 led_handle = NULL; 6002 return TPACPI_LED_NONE; 6003 } 6004 6005 static int __init led_init(struct ibm_init_struct *iibm) 6006 { 6007 unsigned int i; 6008 int rc; 6009 unsigned long useful_leds; 6010 6011 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 6012 6013 led_supported = led_init_detect_mode(); 6014 6015 if (led_supported != TPACPI_LED_NONE) { 6016 useful_leds = tpacpi_check_quirks(led_useful_qtable, 6017 ARRAY_SIZE(led_useful_qtable)); 6018 6019 if (!useful_leds) { 6020 led_handle = NULL; 6021 led_supported = TPACPI_LED_NONE; 6022 } 6023 } 6024 6025 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 6026 str_supported(led_supported), led_supported); 6027 6028 if (led_supported == TPACPI_LED_NONE) 6029 return 1; 6030 6031 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds), 6032 GFP_KERNEL); 6033 if (!tpacpi_leds) { 6034 pr_err("Out of memory for LED data\n"); 6035 return -ENOMEM; 6036 } 6037 6038 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 6039 tpacpi_leds[i].led = -1; 6040 6041 if (!tpacpi_is_led_restricted(i) && 6042 test_bit(i, &useful_leds)) { 6043 rc = tpacpi_init_led(i); 6044 if (rc < 0) { 6045 led_exit(); 6046 return rc; 6047 } 6048 } 6049 } 6050 6051 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 6052 pr_notice("warning: userspace override of important firmware LEDs is enabled\n"); 6053 #endif 6054 return 0; 6055 } 6056 6057 #define str_led_status(s) \ 6058 ((s) == TPACPI_LED_OFF ? "off" : \ 6059 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 6060 6061 static int led_read(struct seq_file *m) 6062 { 6063 if (!led_supported) { 6064 seq_printf(m, "status:\t\tnot supported\n"); 6065 return 0; 6066 } 6067 seq_printf(m, "status:\t\tsupported\n"); 6068 6069 if (led_supported == TPACPI_LED_570) { 6070 /* 570 */ 6071 int i, status; 6072 for (i = 0; i < 8; i++) { 6073 status = led_get_status(i); 6074 if (status < 0) 6075 return -EIO; 6076 seq_printf(m, "%d:\t\t%s\n", 6077 i, str_led_status(status)); 6078 } 6079 } 6080 6081 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 6082 6083 return 0; 6084 } 6085 6086 static int led_write(char *buf) 6087 { 6088 char *cmd; 6089 int led, rc; 6090 enum led_status_t s; 6091 6092 if (!led_supported) 6093 return -ENODEV; 6094 6095 while ((cmd = next_cmd(&buf))) { 6096 if (sscanf(cmd, "%d", &led) != 1) 6097 return -EINVAL; 6098 6099 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 6100 tpacpi_leds[led].led < 0) 6101 return -ENODEV; 6102 6103 if (strstr(cmd, "off")) { 6104 s = TPACPI_LED_OFF; 6105 } else if (strstr(cmd, "on")) { 6106 s = TPACPI_LED_ON; 6107 } else if (strstr(cmd, "blink")) { 6108 s = TPACPI_LED_BLINK; 6109 } else { 6110 return -EINVAL; 6111 } 6112 6113 rc = led_set_status(led, s); 6114 if (rc < 0) 6115 return rc; 6116 } 6117 6118 return 0; 6119 } 6120 6121 static struct ibm_struct led_driver_data = { 6122 .name = "led", 6123 .read = led_read, 6124 .write = led_write, 6125 .exit = led_exit, 6126 }; 6127 6128 /************************************************************************* 6129 * Beep subdriver 6130 */ 6131 6132 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 6133 6134 #define TPACPI_BEEP_Q1 0x0001 6135 6136 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 6137 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 6138 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 6139 }; 6140 6141 static int __init beep_init(struct ibm_init_struct *iibm) 6142 { 6143 unsigned long quirks; 6144 6145 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 6146 6147 TPACPI_ACPIHANDLE_INIT(beep); 6148 6149 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 6150 str_supported(beep_handle != NULL)); 6151 6152 quirks = tpacpi_check_quirks(beep_quirk_table, 6153 ARRAY_SIZE(beep_quirk_table)); 6154 6155 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6156 6157 return (beep_handle) ? 0 : 1; 6158 } 6159 6160 static int beep_read(struct seq_file *m) 6161 { 6162 if (!beep_handle) 6163 seq_printf(m, "status:\t\tnot supported\n"); 6164 else { 6165 seq_printf(m, "status:\t\tsupported\n"); 6166 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6167 } 6168 6169 return 0; 6170 } 6171 6172 static int beep_write(char *buf) 6173 { 6174 char *cmd; 6175 int beep_cmd; 6176 6177 if (!beep_handle) 6178 return -ENODEV; 6179 6180 while ((cmd = next_cmd(&buf))) { 6181 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6182 beep_cmd >= 0 && beep_cmd <= 17) { 6183 /* beep_cmd set */ 6184 } else 6185 return -EINVAL; 6186 if (tp_features.beep_needs_two_args) { 6187 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6188 beep_cmd, 0)) 6189 return -EIO; 6190 } else { 6191 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6192 beep_cmd)) 6193 return -EIO; 6194 } 6195 } 6196 6197 return 0; 6198 } 6199 6200 static struct ibm_struct beep_driver_data = { 6201 .name = "beep", 6202 .read = beep_read, 6203 .write = beep_write, 6204 }; 6205 6206 /************************************************************************* 6207 * Thermal subdriver 6208 */ 6209 6210 enum thermal_access_mode { 6211 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6212 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6213 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6214 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6215 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6216 }; 6217 6218 enum { /* TPACPI_THERMAL_TPEC_* */ 6219 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6220 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6221 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6222 6223 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6224 }; 6225 6226 6227 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6228 struct ibm_thermal_sensors_struct { 6229 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6230 }; 6231 6232 static enum thermal_access_mode thermal_read_mode; 6233 6234 /* idx is zero-based */ 6235 static int thermal_get_sensor(int idx, s32 *value) 6236 { 6237 int t; 6238 s8 tmp; 6239 char tmpi[5]; 6240 6241 t = TP_EC_THERMAL_TMP0; 6242 6243 switch (thermal_read_mode) { 6244 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6245 case TPACPI_THERMAL_TPEC_16: 6246 if (idx >= 8 && idx <= 15) { 6247 t = TP_EC_THERMAL_TMP8; 6248 idx -= 8; 6249 } 6250 /* fallthrough */ 6251 #endif 6252 case TPACPI_THERMAL_TPEC_8: 6253 if (idx <= 7) { 6254 if (!acpi_ec_read(t + idx, &tmp)) 6255 return -EIO; 6256 *value = tmp * 1000; 6257 return 0; 6258 } 6259 break; 6260 6261 case TPACPI_THERMAL_ACPI_UPDT: 6262 if (idx <= 7) { 6263 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6264 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6265 return -EIO; 6266 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6267 return -EIO; 6268 *value = (t - 2732) * 100; 6269 return 0; 6270 } 6271 break; 6272 6273 case TPACPI_THERMAL_ACPI_TMP07: 6274 if (idx <= 7) { 6275 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6276 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6277 return -EIO; 6278 if (t > 127 || t < -127) 6279 t = TP_EC_THERMAL_TMP_NA; 6280 *value = t * 1000; 6281 return 0; 6282 } 6283 break; 6284 6285 case TPACPI_THERMAL_NONE: 6286 default: 6287 return -ENOSYS; 6288 } 6289 6290 return -EINVAL; 6291 } 6292 6293 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6294 { 6295 int res, i; 6296 int n; 6297 6298 n = 8; 6299 i = 0; 6300 6301 if (!s) 6302 return -EINVAL; 6303 6304 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6305 n = 16; 6306 6307 for (i = 0 ; i < n; i++) { 6308 res = thermal_get_sensor(i, &s->temp[i]); 6309 if (res) 6310 return res; 6311 } 6312 6313 return n; 6314 } 6315 6316 static void thermal_dump_all_sensors(void) 6317 { 6318 int n, i; 6319 struct ibm_thermal_sensors_struct t; 6320 6321 n = thermal_get_sensors(&t); 6322 if (n <= 0) 6323 return; 6324 6325 pr_notice("temperatures (Celsius):"); 6326 6327 for (i = 0; i < n; i++) { 6328 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6329 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6330 else 6331 pr_cont(" N/A"); 6332 } 6333 6334 pr_cont("\n"); 6335 } 6336 6337 /* sysfs temp##_input -------------------------------------------------- */ 6338 6339 static ssize_t thermal_temp_input_show(struct device *dev, 6340 struct device_attribute *attr, 6341 char *buf) 6342 { 6343 struct sensor_device_attribute *sensor_attr = 6344 to_sensor_dev_attr(attr); 6345 int idx = sensor_attr->index; 6346 s32 value; 6347 int res; 6348 6349 res = thermal_get_sensor(idx, &value); 6350 if (res) 6351 return res; 6352 if (value == TPACPI_THERMAL_SENSOR_NA) 6353 return -ENXIO; 6354 6355 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6356 } 6357 6358 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6359 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6360 thermal_temp_input_show, NULL, _idxB) 6361 6362 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6363 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6364 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6365 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6366 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6367 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6368 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6369 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6370 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6371 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6372 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6373 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6374 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6375 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6376 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6377 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6378 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6379 }; 6380 6381 #define THERMAL_ATTRS(X) \ 6382 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6383 6384 static struct attribute *thermal_temp_input_attr[] = { 6385 THERMAL_ATTRS(8), 6386 THERMAL_ATTRS(9), 6387 THERMAL_ATTRS(10), 6388 THERMAL_ATTRS(11), 6389 THERMAL_ATTRS(12), 6390 THERMAL_ATTRS(13), 6391 THERMAL_ATTRS(14), 6392 THERMAL_ATTRS(15), 6393 THERMAL_ATTRS(0), 6394 THERMAL_ATTRS(1), 6395 THERMAL_ATTRS(2), 6396 THERMAL_ATTRS(3), 6397 THERMAL_ATTRS(4), 6398 THERMAL_ATTRS(5), 6399 THERMAL_ATTRS(6), 6400 THERMAL_ATTRS(7), 6401 NULL 6402 }; 6403 6404 static const struct attribute_group thermal_temp_input16_group = { 6405 .attrs = thermal_temp_input_attr 6406 }; 6407 6408 static const struct attribute_group thermal_temp_input8_group = { 6409 .attrs = &thermal_temp_input_attr[8] 6410 }; 6411 6412 #undef THERMAL_SENSOR_ATTR_TEMP 6413 #undef THERMAL_ATTRS 6414 6415 /* --------------------------------------------------------------------- */ 6416 6417 static int __init thermal_init(struct ibm_init_struct *iibm) 6418 { 6419 u8 t, ta1, ta2; 6420 int i; 6421 int acpi_tmp7; 6422 int res; 6423 6424 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6425 6426 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6427 6428 if (thinkpad_id.ec_model) { 6429 /* 6430 * Direct EC access mode: sensors at registers 6431 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6432 * non-implemented, thermal sensors return 0x80 when 6433 * not available 6434 */ 6435 6436 ta1 = ta2 = 0; 6437 for (i = 0; i < 8; i++) { 6438 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6439 ta1 |= t; 6440 } else { 6441 ta1 = 0; 6442 break; 6443 } 6444 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6445 ta2 |= t; 6446 } else { 6447 ta1 = 0; 6448 break; 6449 } 6450 } 6451 if (ta1 == 0) { 6452 /* This is sheer paranoia, but we handle it anyway */ 6453 if (acpi_tmp7) { 6454 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n"); 6455 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6456 } else { 6457 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n"); 6458 thermal_read_mode = TPACPI_THERMAL_NONE; 6459 } 6460 } else { 6461 thermal_read_mode = 6462 (ta2 != 0) ? 6463 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6464 } 6465 } else if (acpi_tmp7) { 6466 if (tpacpi_is_ibm() && 6467 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6468 /* 600e/x, 770e, 770x */ 6469 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6470 } else { 6471 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6472 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6473 } 6474 } else { 6475 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6476 thermal_read_mode = TPACPI_THERMAL_NONE; 6477 } 6478 6479 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6480 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6481 thermal_read_mode); 6482 6483 switch (thermal_read_mode) { 6484 case TPACPI_THERMAL_TPEC_16: 6485 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6486 &thermal_temp_input16_group); 6487 if (res) 6488 return res; 6489 break; 6490 case TPACPI_THERMAL_TPEC_8: 6491 case TPACPI_THERMAL_ACPI_TMP07: 6492 case TPACPI_THERMAL_ACPI_UPDT: 6493 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6494 &thermal_temp_input8_group); 6495 if (res) 6496 return res; 6497 break; 6498 case TPACPI_THERMAL_NONE: 6499 default: 6500 return 1; 6501 } 6502 6503 return 0; 6504 } 6505 6506 static void thermal_exit(void) 6507 { 6508 switch (thermal_read_mode) { 6509 case TPACPI_THERMAL_TPEC_16: 6510 sysfs_remove_group(&tpacpi_hwmon->kobj, 6511 &thermal_temp_input16_group); 6512 break; 6513 case TPACPI_THERMAL_TPEC_8: 6514 case TPACPI_THERMAL_ACPI_TMP07: 6515 case TPACPI_THERMAL_ACPI_UPDT: 6516 sysfs_remove_group(&tpacpi_hwmon->kobj, 6517 &thermal_temp_input8_group); 6518 break; 6519 case TPACPI_THERMAL_NONE: 6520 default: 6521 break; 6522 } 6523 } 6524 6525 static int thermal_read(struct seq_file *m) 6526 { 6527 int n, i; 6528 struct ibm_thermal_sensors_struct t; 6529 6530 n = thermal_get_sensors(&t); 6531 if (unlikely(n < 0)) 6532 return n; 6533 6534 seq_printf(m, "temperatures:\t"); 6535 6536 if (n > 0) { 6537 for (i = 0; i < (n - 1); i++) 6538 seq_printf(m, "%d ", t.temp[i] / 1000); 6539 seq_printf(m, "%d\n", t.temp[i] / 1000); 6540 } else 6541 seq_printf(m, "not supported\n"); 6542 6543 return 0; 6544 } 6545 6546 static struct ibm_struct thermal_driver_data = { 6547 .name = "thermal", 6548 .read = thermal_read, 6549 .exit = thermal_exit, 6550 }; 6551 6552 /************************************************************************* 6553 * Backlight/brightness subdriver 6554 */ 6555 6556 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6557 6558 /* 6559 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6560 * CMOS NVRAM byte 0x5E, bits 0-3. 6561 * 6562 * EC HBRV (0x31) has the following layout 6563 * Bit 7: unknown function 6564 * Bit 6: unknown function 6565 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6566 * Bit 4: must be set to zero to avoid problems 6567 * Bit 3-0: backlight brightness level 6568 * 6569 * brightness_get_raw returns status data in the HBRV layout 6570 * 6571 * WARNING: The X61 has been verified to use HBRV for something else, so 6572 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6573 * testing on the very early *60 Lenovo models... 6574 */ 6575 6576 enum { 6577 TP_EC_BACKLIGHT = 0x31, 6578 6579 /* TP_EC_BACKLIGHT bitmasks */ 6580 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6581 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6582 TP_EC_BACKLIGHT_MAPSW = 0x20, 6583 }; 6584 6585 enum tpacpi_brightness_access_mode { 6586 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6587 TPACPI_BRGHT_MODE_EC, /* EC control */ 6588 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6589 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6590 TPACPI_BRGHT_MODE_MAX 6591 }; 6592 6593 static struct backlight_device *ibm_backlight_device; 6594 6595 static enum tpacpi_brightness_access_mode brightness_mode = 6596 TPACPI_BRGHT_MODE_MAX; 6597 6598 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6599 6600 static struct mutex brightness_mutex; 6601 6602 /* NVRAM brightness access, 6603 * call with brightness_mutex held! */ 6604 static unsigned int tpacpi_brightness_nvram_get(void) 6605 { 6606 u8 lnvram; 6607 6608 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6609 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6610 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6611 lnvram &= bright_maxlvl; 6612 6613 return lnvram; 6614 } 6615 6616 static void tpacpi_brightness_checkpoint_nvram(void) 6617 { 6618 u8 lec = 0; 6619 u8 b_nvram; 6620 6621 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6622 return; 6623 6624 vdbg_printk(TPACPI_DBG_BRGHT, 6625 "trying to checkpoint backlight level to NVRAM...\n"); 6626 6627 if (mutex_lock_killable(&brightness_mutex) < 0) 6628 return; 6629 6630 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6631 goto unlock; 6632 lec &= TP_EC_BACKLIGHT_LVLMSK; 6633 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6634 6635 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6636 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6637 /* NVRAM needs update */ 6638 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6639 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6640 b_nvram |= lec; 6641 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6642 dbg_printk(TPACPI_DBG_BRGHT, 6643 "updated NVRAM backlight level to %u (0x%02x)\n", 6644 (unsigned int) lec, (unsigned int) b_nvram); 6645 } else 6646 vdbg_printk(TPACPI_DBG_BRGHT, 6647 "NVRAM backlight level already is %u (0x%02x)\n", 6648 (unsigned int) lec, (unsigned int) b_nvram); 6649 6650 unlock: 6651 mutex_unlock(&brightness_mutex); 6652 } 6653 6654 6655 /* call with brightness_mutex held! */ 6656 static int tpacpi_brightness_get_raw(int *status) 6657 { 6658 u8 lec = 0; 6659 6660 switch (brightness_mode) { 6661 case TPACPI_BRGHT_MODE_UCMS_STEP: 6662 *status = tpacpi_brightness_nvram_get(); 6663 return 0; 6664 case TPACPI_BRGHT_MODE_EC: 6665 case TPACPI_BRGHT_MODE_ECNVRAM: 6666 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6667 return -EIO; 6668 *status = lec; 6669 return 0; 6670 default: 6671 return -ENXIO; 6672 } 6673 } 6674 6675 /* call with brightness_mutex held! */ 6676 /* do NOT call with illegal backlight level value */ 6677 static int tpacpi_brightness_set_ec(unsigned int value) 6678 { 6679 u8 lec = 0; 6680 6681 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6682 return -EIO; 6683 6684 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6685 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6686 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6687 return -EIO; 6688 6689 return 0; 6690 } 6691 6692 /* call with brightness_mutex held! */ 6693 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6694 { 6695 int cmos_cmd, inc; 6696 unsigned int current_value, i; 6697 6698 current_value = tpacpi_brightness_nvram_get(); 6699 6700 if (value == current_value) 6701 return 0; 6702 6703 cmos_cmd = (value > current_value) ? 6704 TP_CMOS_BRIGHTNESS_UP : 6705 TP_CMOS_BRIGHTNESS_DOWN; 6706 inc = (value > current_value) ? 1 : -1; 6707 6708 for (i = current_value; i != value; i += inc) 6709 if (issue_thinkpad_cmos_command(cmos_cmd)) 6710 return -EIO; 6711 6712 return 0; 6713 } 6714 6715 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6716 static int brightness_set(unsigned int value) 6717 { 6718 int res; 6719 6720 if (value > bright_maxlvl) 6721 return -EINVAL; 6722 6723 vdbg_printk(TPACPI_DBG_BRGHT, 6724 "set backlight level to %d\n", value); 6725 6726 res = mutex_lock_killable(&brightness_mutex); 6727 if (res < 0) 6728 return res; 6729 6730 switch (brightness_mode) { 6731 case TPACPI_BRGHT_MODE_EC: 6732 case TPACPI_BRGHT_MODE_ECNVRAM: 6733 res = tpacpi_brightness_set_ec(value); 6734 break; 6735 case TPACPI_BRGHT_MODE_UCMS_STEP: 6736 res = tpacpi_brightness_set_ucmsstep(value); 6737 break; 6738 default: 6739 res = -ENXIO; 6740 } 6741 6742 mutex_unlock(&brightness_mutex); 6743 return res; 6744 } 6745 6746 /* sysfs backlight class ----------------------------------------------- */ 6747 6748 static int brightness_update_status(struct backlight_device *bd) 6749 { 6750 unsigned int level = 6751 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6752 bd->props.power == FB_BLANK_UNBLANK) ? 6753 bd->props.brightness : 0; 6754 6755 dbg_printk(TPACPI_DBG_BRGHT, 6756 "backlight: attempt to set level to %d\n", 6757 level); 6758 6759 /* it is the backlight class's job (caller) to handle 6760 * EINTR and other errors properly */ 6761 return brightness_set(level); 6762 } 6763 6764 static int brightness_get(struct backlight_device *bd) 6765 { 6766 int status, res; 6767 6768 res = mutex_lock_killable(&brightness_mutex); 6769 if (res < 0) 6770 return 0; 6771 6772 res = tpacpi_brightness_get_raw(&status); 6773 6774 mutex_unlock(&brightness_mutex); 6775 6776 if (res < 0) 6777 return 0; 6778 6779 return status & TP_EC_BACKLIGHT_LVLMSK; 6780 } 6781 6782 static void tpacpi_brightness_notify_change(void) 6783 { 6784 backlight_force_update(ibm_backlight_device, 6785 BACKLIGHT_UPDATE_HOTKEY); 6786 } 6787 6788 static const struct backlight_ops ibm_backlight_data = { 6789 .get_brightness = brightness_get, 6790 .update_status = brightness_update_status, 6791 }; 6792 6793 /* --------------------------------------------------------------------- */ 6794 6795 /* 6796 * Call _BCL method of video device. On some ThinkPads this will 6797 * switch the firmware to the ACPI brightness control mode. 6798 */ 6799 6800 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6801 { 6802 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6803 union acpi_object *obj; 6804 struct acpi_device *device, *child; 6805 int rc; 6806 6807 if (acpi_bus_get_device(handle, &device)) 6808 return 0; 6809 6810 rc = 0; 6811 list_for_each_entry(child, &device->children, node) { 6812 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6813 NULL, &buffer); 6814 if (ACPI_FAILURE(status)) 6815 continue; 6816 6817 obj = (union acpi_object *)buffer.pointer; 6818 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6819 pr_err("Unknown _BCL data, please report this to %s\n", 6820 TPACPI_MAIL); 6821 rc = 0; 6822 } else { 6823 rc = obj->package.count; 6824 } 6825 break; 6826 } 6827 6828 kfree(buffer.pointer); 6829 return rc; 6830 } 6831 6832 6833 /* 6834 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6835 */ 6836 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6837 { 6838 acpi_handle video_device; 6839 int bcl_levels = 0; 6840 6841 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6842 if (video_device) 6843 bcl_levels = tpacpi_query_bcl_levels(video_device); 6844 6845 tp_features.bright_acpimode = (bcl_levels > 0); 6846 6847 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6848 } 6849 6850 /* 6851 * These are only useful for models that have only one possibility 6852 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6853 * these quirks. 6854 */ 6855 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6856 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6857 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6858 6859 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6860 /* Models with ATI GPUs known to require ECNVRAM mode */ 6861 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6862 6863 /* Models with ATI GPUs that can use ECNVRAM */ 6864 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6865 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6866 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6867 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6868 6869 /* Models with Intel Extreme Graphics 2 */ 6870 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6871 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6872 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6873 6874 /* Models with Intel GMA900 */ 6875 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6876 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6877 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6878 }; 6879 6880 /* 6881 * Returns < 0 for error, otherwise sets tp_features.bright_* 6882 * and bright_maxlvl. 6883 */ 6884 static void __init tpacpi_detect_brightness_capabilities(void) 6885 { 6886 unsigned int b; 6887 6888 vdbg_printk(TPACPI_DBG_INIT, 6889 "detecting firmware brightness interface capabilities\n"); 6890 6891 /* we could run a quirks check here (same table used by 6892 * brightness_init) if needed */ 6893 6894 /* 6895 * We always attempt to detect acpi support, so as to switch 6896 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6897 * going to publish a backlight interface 6898 */ 6899 b = tpacpi_check_std_acpi_brightness_support(); 6900 switch (b) { 6901 case 16: 6902 bright_maxlvl = 15; 6903 break; 6904 case 8: 6905 case 0: 6906 bright_maxlvl = 7; 6907 break; 6908 default: 6909 tp_features.bright_unkfw = 1; 6910 bright_maxlvl = b - 1; 6911 } 6912 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6913 } 6914 6915 static int __init brightness_init(struct ibm_init_struct *iibm) 6916 { 6917 struct backlight_properties props; 6918 int b; 6919 unsigned long quirks; 6920 6921 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6922 6923 mutex_init(&brightness_mutex); 6924 6925 quirks = tpacpi_check_quirks(brightness_quirk_table, 6926 ARRAY_SIZE(brightness_quirk_table)); 6927 6928 /* tpacpi_detect_brightness_capabilities() must have run already */ 6929 6930 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6931 if (tp_features.bright_unkfw) 6932 return 1; 6933 6934 if (!brightness_enable) { 6935 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6936 "brightness support disabled by module parameter\n"); 6937 return 1; 6938 } 6939 6940 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6941 if (brightness_enable > 1) { 6942 pr_info("Standard ACPI backlight interface available, not loading native one\n"); 6943 return 1; 6944 } else if (brightness_enable == 1) { 6945 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n"); 6946 return 1; 6947 } 6948 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6949 pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n"); 6950 } 6951 6952 /* 6953 * Check for module parameter bogosity, note that we 6954 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6955 * able to detect "unspecified" 6956 */ 6957 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6958 return -EINVAL; 6959 6960 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6961 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6962 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6963 if (quirks & TPACPI_BRGHT_Q_EC) 6964 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6965 else 6966 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6967 6968 dbg_printk(TPACPI_DBG_BRGHT, 6969 "driver auto-selected brightness_mode=%d\n", 6970 brightness_mode); 6971 } 6972 6973 /* Safety */ 6974 if (!tpacpi_is_ibm() && 6975 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6976 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6977 return -EINVAL; 6978 6979 if (tpacpi_brightness_get_raw(&b) < 0) 6980 return 1; 6981 6982 memset(&props, 0, sizeof(struct backlight_properties)); 6983 props.type = BACKLIGHT_PLATFORM; 6984 props.max_brightness = bright_maxlvl; 6985 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6986 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6987 NULL, NULL, 6988 &ibm_backlight_data, 6989 &props); 6990 if (IS_ERR(ibm_backlight_device)) { 6991 int rc = PTR_ERR(ibm_backlight_device); 6992 ibm_backlight_device = NULL; 6993 pr_err("Could not register backlight device\n"); 6994 return rc; 6995 } 6996 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6997 "brightness is supported\n"); 6998 6999 if (quirks & TPACPI_BRGHT_Q_ASK) { 7000 pr_notice("brightness: will use unverified default: brightness_mode=%d\n", 7001 brightness_mode); 7002 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n", 7003 TPACPI_MAIL); 7004 } 7005 7006 /* Added by mistake in early 2007. Probably useless, but it could 7007 * be working around some unknown firmware problem where the value 7008 * read at startup doesn't match the real hardware state... so leave 7009 * it in place just in case */ 7010 backlight_update_status(ibm_backlight_device); 7011 7012 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7013 "brightness: registering brightness hotkeys as change notification\n"); 7014 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7015 | TP_ACPI_HKEY_BRGHTUP_MASK 7016 | TP_ACPI_HKEY_BRGHTDWN_MASK); 7017 return 0; 7018 } 7019 7020 static void brightness_suspend(void) 7021 { 7022 tpacpi_brightness_checkpoint_nvram(); 7023 } 7024 7025 static void brightness_shutdown(void) 7026 { 7027 tpacpi_brightness_checkpoint_nvram(); 7028 } 7029 7030 static void brightness_exit(void) 7031 { 7032 if (ibm_backlight_device) { 7033 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 7034 "calling backlight_device_unregister()\n"); 7035 backlight_device_unregister(ibm_backlight_device); 7036 } 7037 7038 tpacpi_brightness_checkpoint_nvram(); 7039 } 7040 7041 static int brightness_read(struct seq_file *m) 7042 { 7043 int level; 7044 7045 level = brightness_get(NULL); 7046 if (level < 0) { 7047 seq_printf(m, "level:\t\tunreadable\n"); 7048 } else { 7049 seq_printf(m, "level:\t\t%d\n", level); 7050 seq_printf(m, "commands:\tup, down\n"); 7051 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7052 bright_maxlvl); 7053 } 7054 7055 return 0; 7056 } 7057 7058 static int brightness_write(char *buf) 7059 { 7060 int level; 7061 int rc; 7062 char *cmd; 7063 7064 level = brightness_get(NULL); 7065 if (level < 0) 7066 return level; 7067 7068 while ((cmd = next_cmd(&buf))) { 7069 if (strlencmp(cmd, "up") == 0) { 7070 if (level < bright_maxlvl) 7071 level++; 7072 } else if (strlencmp(cmd, "down") == 0) { 7073 if (level > 0) 7074 level--; 7075 } else if (sscanf(cmd, "level %d", &level) == 1 && 7076 level >= 0 && level <= bright_maxlvl) { 7077 /* new level set */ 7078 } else 7079 return -EINVAL; 7080 } 7081 7082 tpacpi_disclose_usertask("procfs brightness", 7083 "set level to %d\n", level); 7084 7085 /* 7086 * Now we know what the final level should be, so we try to set it. 7087 * Doing it this way makes the syscall restartable in case of EINTR 7088 */ 7089 rc = brightness_set(level); 7090 if (!rc && ibm_backlight_device) 7091 backlight_force_update(ibm_backlight_device, 7092 BACKLIGHT_UPDATE_SYSFS); 7093 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7094 } 7095 7096 static struct ibm_struct brightness_driver_data = { 7097 .name = "brightness", 7098 .read = brightness_read, 7099 .write = brightness_write, 7100 .exit = brightness_exit, 7101 .suspend = brightness_suspend, 7102 .shutdown = brightness_shutdown, 7103 }; 7104 7105 /************************************************************************* 7106 * Volume subdriver 7107 */ 7108 7109 /* 7110 * IBM ThinkPads have a simple volume controller with MUTE gating. 7111 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 7112 * 7113 * Since the *61 series (and probably also the later *60 series), Lenovo 7114 * ThinkPads only implement the MUTE gate. 7115 * 7116 * EC register 0x30 7117 * Bit 6: MUTE (1 mutes sound) 7118 * Bit 3-0: Volume 7119 * Other bits should be zero as far as we know. 7120 * 7121 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 7122 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 7123 * such as bit 7 which is used to detect repeated presses of MUTE, 7124 * and we leave them unchanged. 7125 * 7126 * On newer Lenovo ThinkPads, the EC can automatically change the volume 7127 * in response to user input. Unfortunately, this rarely works well. 7128 * The laptop changes the state of its internal MUTE gate and, on some 7129 * models, sends KEY_MUTE, causing any user code that responds to the 7130 * mute button to get confused. The hardware MUTE gate is also 7131 * unnecessary, since user code can handle the mute button without 7132 * kernel or EC help. 7133 * 7134 * To avoid confusing userspace, we simply disable all EC-based mute 7135 * and volume controls when possible. 7136 */ 7137 7138 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 7139 7140 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 7141 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 7142 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7143 7144 #if SNDRV_CARDS <= 32 7145 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7146 #else 7147 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7148 #endif 7149 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7150 static char *alsa_id = "ThinkPadEC"; 7151 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7152 7153 struct tpacpi_alsa_data { 7154 struct snd_card *card; 7155 struct snd_ctl_elem_id *ctl_mute_id; 7156 struct snd_ctl_elem_id *ctl_vol_id; 7157 }; 7158 7159 static struct snd_card *alsa_card; 7160 7161 enum { 7162 TP_EC_AUDIO = 0x30, 7163 7164 /* TP_EC_AUDIO bits */ 7165 TP_EC_AUDIO_MUTESW = 6, 7166 7167 /* TP_EC_AUDIO bitmasks */ 7168 TP_EC_AUDIO_LVL_MSK = 0x0F, 7169 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7170 7171 /* Maximum volume */ 7172 TP_EC_VOLUME_MAX = 14, 7173 }; 7174 7175 enum tpacpi_volume_access_mode { 7176 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7177 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7178 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7179 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7180 TPACPI_VOL_MODE_MAX 7181 }; 7182 7183 enum tpacpi_volume_capabilities { 7184 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7185 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7186 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7187 TPACPI_VOL_CAP_MAX 7188 }; 7189 7190 enum tpacpi_mute_btn_mode { 7191 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7192 /* We don't know what mode 1 is. */ 7193 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7194 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7195 }; 7196 7197 static enum tpacpi_volume_access_mode volume_mode = 7198 TPACPI_VOL_MODE_MAX; 7199 7200 static enum tpacpi_volume_capabilities volume_capabilities; 7201 static bool volume_control_allowed; 7202 static bool software_mute_requested = true; 7203 static bool software_mute_active; 7204 static int software_mute_orig_mode; 7205 7206 /* 7207 * Used to syncronize writers to TP_EC_AUDIO and 7208 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7209 */ 7210 static struct mutex volume_mutex; 7211 7212 static void tpacpi_volume_checkpoint_nvram(void) 7213 { 7214 u8 lec = 0; 7215 u8 b_nvram; 7216 u8 ec_mask; 7217 7218 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7219 return; 7220 if (!volume_control_allowed) 7221 return; 7222 if (software_mute_active) 7223 return; 7224 7225 vdbg_printk(TPACPI_DBG_MIXER, 7226 "trying to checkpoint mixer state to NVRAM...\n"); 7227 7228 if (tp_features.mixer_no_level_control) 7229 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7230 else 7231 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7232 7233 if (mutex_lock_killable(&volume_mutex) < 0) 7234 return; 7235 7236 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7237 goto unlock; 7238 lec &= ec_mask; 7239 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7240 7241 if (lec != (b_nvram & ec_mask)) { 7242 /* NVRAM needs update */ 7243 b_nvram &= ~ec_mask; 7244 b_nvram |= lec; 7245 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7246 dbg_printk(TPACPI_DBG_MIXER, 7247 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7248 (unsigned int) lec, (unsigned int) b_nvram); 7249 } else { 7250 vdbg_printk(TPACPI_DBG_MIXER, 7251 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7252 (unsigned int) lec, (unsigned int) b_nvram); 7253 } 7254 7255 unlock: 7256 mutex_unlock(&volume_mutex); 7257 } 7258 7259 static int volume_get_status_ec(u8 *status) 7260 { 7261 u8 s; 7262 7263 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7264 return -EIO; 7265 7266 *status = s; 7267 7268 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7269 7270 return 0; 7271 } 7272 7273 static int volume_get_status(u8 *status) 7274 { 7275 return volume_get_status_ec(status); 7276 } 7277 7278 static int volume_set_status_ec(const u8 status) 7279 { 7280 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7281 return -EIO; 7282 7283 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7284 7285 /* 7286 * On X200s, and possibly on others, it can take a while for 7287 * reads to become correct. 7288 */ 7289 msleep(1); 7290 7291 return 0; 7292 } 7293 7294 static int volume_set_status(const u8 status) 7295 { 7296 return volume_set_status_ec(status); 7297 } 7298 7299 /* returns < 0 on error, 0 on no change, 1 on change */ 7300 static int __volume_set_mute_ec(const bool mute) 7301 { 7302 int rc; 7303 u8 s, n; 7304 7305 if (mutex_lock_killable(&volume_mutex) < 0) 7306 return -EINTR; 7307 7308 rc = volume_get_status_ec(&s); 7309 if (rc) 7310 goto unlock; 7311 7312 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7313 s & ~TP_EC_AUDIO_MUTESW_MSK; 7314 7315 if (n != s) { 7316 rc = volume_set_status_ec(n); 7317 if (!rc) 7318 rc = 1; 7319 } 7320 7321 unlock: 7322 mutex_unlock(&volume_mutex); 7323 return rc; 7324 } 7325 7326 static int volume_alsa_set_mute(const bool mute) 7327 { 7328 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7329 (mute) ? "" : "un"); 7330 return __volume_set_mute_ec(mute); 7331 } 7332 7333 static int volume_set_mute(const bool mute) 7334 { 7335 int rc; 7336 7337 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7338 (mute) ? "" : "un"); 7339 7340 rc = __volume_set_mute_ec(mute); 7341 return (rc < 0) ? rc : 0; 7342 } 7343 7344 /* returns < 0 on error, 0 on no change, 1 on change */ 7345 static int __volume_set_volume_ec(const u8 vol) 7346 { 7347 int rc; 7348 u8 s, n; 7349 7350 if (vol > TP_EC_VOLUME_MAX) 7351 return -EINVAL; 7352 7353 if (mutex_lock_killable(&volume_mutex) < 0) 7354 return -EINTR; 7355 7356 rc = volume_get_status_ec(&s); 7357 if (rc) 7358 goto unlock; 7359 7360 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7361 7362 if (n != s) { 7363 rc = volume_set_status_ec(n); 7364 if (!rc) 7365 rc = 1; 7366 } 7367 7368 unlock: 7369 mutex_unlock(&volume_mutex); 7370 return rc; 7371 } 7372 7373 static int volume_set_software_mute(bool startup) 7374 { 7375 int result; 7376 7377 if (!tpacpi_is_lenovo()) 7378 return -ENODEV; 7379 7380 if (startup) { 7381 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7382 "HAUM", "qd")) 7383 return -EIO; 7384 7385 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7386 "Initial HAUM setting was %d\n", 7387 software_mute_orig_mode); 7388 } 7389 7390 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7391 (int)TP_EC_MUTE_BTN_NONE)) 7392 return -EIO; 7393 7394 if (result != TP_EC_MUTE_BTN_NONE) 7395 pr_warn("Unexpected SAUM result %d\n", 7396 result); 7397 7398 /* 7399 * In software mute mode, the standard codec controls take 7400 * precendence, so we unmute the ThinkPad HW switch at 7401 * startup. Just on case there are SAUM-capable ThinkPads 7402 * with level controls, set max HW volume as well. 7403 */ 7404 if (tp_features.mixer_no_level_control) 7405 result = volume_set_mute(false); 7406 else 7407 result = volume_set_status(TP_EC_VOLUME_MAX); 7408 7409 if (result != 0) 7410 pr_warn("Failed to unmute the HW mute switch\n"); 7411 7412 return 0; 7413 } 7414 7415 static void volume_exit_software_mute(void) 7416 { 7417 int r; 7418 7419 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7420 || r != software_mute_orig_mode) 7421 pr_warn("Failed to restore mute mode\n"); 7422 } 7423 7424 static int volume_alsa_set_volume(const u8 vol) 7425 { 7426 dbg_printk(TPACPI_DBG_MIXER, 7427 "ALSA: trying to set volume level to %hu\n", vol); 7428 return __volume_set_volume_ec(vol); 7429 } 7430 7431 static void volume_alsa_notify_change(void) 7432 { 7433 struct tpacpi_alsa_data *d; 7434 7435 if (alsa_card && alsa_card->private_data) { 7436 d = alsa_card->private_data; 7437 if (d->ctl_mute_id) 7438 snd_ctl_notify(alsa_card, 7439 SNDRV_CTL_EVENT_MASK_VALUE, 7440 d->ctl_mute_id); 7441 if (d->ctl_vol_id) 7442 snd_ctl_notify(alsa_card, 7443 SNDRV_CTL_EVENT_MASK_VALUE, 7444 d->ctl_vol_id); 7445 } 7446 } 7447 7448 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7449 struct snd_ctl_elem_info *uinfo) 7450 { 7451 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7452 uinfo->count = 1; 7453 uinfo->value.integer.min = 0; 7454 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7455 return 0; 7456 } 7457 7458 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7459 struct snd_ctl_elem_value *ucontrol) 7460 { 7461 u8 s; 7462 int rc; 7463 7464 rc = volume_get_status(&s); 7465 if (rc < 0) 7466 return rc; 7467 7468 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7469 return 0; 7470 } 7471 7472 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7473 struct snd_ctl_elem_value *ucontrol) 7474 { 7475 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7476 ucontrol->value.integer.value[0]); 7477 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7478 } 7479 7480 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7481 7482 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7483 struct snd_ctl_elem_value *ucontrol) 7484 { 7485 u8 s; 7486 int rc; 7487 7488 rc = volume_get_status(&s); 7489 if (rc < 0) 7490 return rc; 7491 7492 ucontrol->value.integer.value[0] = 7493 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7494 return 0; 7495 } 7496 7497 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7498 struct snd_ctl_elem_value *ucontrol) 7499 { 7500 tpacpi_disclose_usertask("ALSA", "%smute\n", 7501 ucontrol->value.integer.value[0] ? 7502 "un" : ""); 7503 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7504 } 7505 7506 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7507 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7508 .name = "Console Playback Volume", 7509 .index = 0, 7510 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7511 .info = volume_alsa_vol_info, 7512 .get = volume_alsa_vol_get, 7513 }; 7514 7515 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7516 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7517 .name = "Console Playback Switch", 7518 .index = 0, 7519 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7520 .info = volume_alsa_mute_info, 7521 .get = volume_alsa_mute_get, 7522 }; 7523 7524 static void volume_suspend(void) 7525 { 7526 tpacpi_volume_checkpoint_nvram(); 7527 } 7528 7529 static void volume_resume(void) 7530 { 7531 if (software_mute_active) { 7532 if (volume_set_software_mute(false) < 0) 7533 pr_warn("Failed to restore software mute\n"); 7534 } else { 7535 volume_alsa_notify_change(); 7536 } 7537 } 7538 7539 static void volume_shutdown(void) 7540 { 7541 tpacpi_volume_checkpoint_nvram(); 7542 } 7543 7544 static void volume_exit(void) 7545 { 7546 if (alsa_card) { 7547 snd_card_free(alsa_card); 7548 alsa_card = NULL; 7549 } 7550 7551 tpacpi_volume_checkpoint_nvram(); 7552 7553 if (software_mute_active) 7554 volume_exit_software_mute(); 7555 } 7556 7557 static int __init volume_create_alsa_mixer(void) 7558 { 7559 struct snd_card *card; 7560 struct tpacpi_alsa_data *data; 7561 struct snd_kcontrol *ctl_vol; 7562 struct snd_kcontrol *ctl_mute; 7563 int rc; 7564 7565 rc = snd_card_new(&tpacpi_pdev->dev, 7566 alsa_index, alsa_id, THIS_MODULE, 7567 sizeof(struct tpacpi_alsa_data), &card); 7568 if (rc < 0 || !card) { 7569 pr_err("Failed to create ALSA card structures: %d\n", rc); 7570 return 1; 7571 } 7572 7573 BUG_ON(!card->private_data); 7574 data = card->private_data; 7575 data->card = card; 7576 7577 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7578 sizeof(card->driver)); 7579 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7580 sizeof(card->shortname)); 7581 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7582 (thinkpad_id.ec_version_str) ? 7583 thinkpad_id.ec_version_str : "(unknown)"); 7584 snprintf(card->longname, sizeof(card->longname), 7585 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7586 (thinkpad_id.ec_version_str) ? 7587 thinkpad_id.ec_version_str : "unknown"); 7588 7589 if (volume_control_allowed) { 7590 volume_alsa_control_vol.put = volume_alsa_vol_put; 7591 volume_alsa_control_vol.access = 7592 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7593 7594 volume_alsa_control_mute.put = volume_alsa_mute_put; 7595 volume_alsa_control_mute.access = 7596 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7597 } 7598 7599 if (!tp_features.mixer_no_level_control) { 7600 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7601 rc = snd_ctl_add(card, ctl_vol); 7602 if (rc < 0) { 7603 pr_err("Failed to create ALSA volume control: %d\n", 7604 rc); 7605 goto err_exit; 7606 } 7607 data->ctl_vol_id = &ctl_vol->id; 7608 } 7609 7610 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7611 rc = snd_ctl_add(card, ctl_mute); 7612 if (rc < 0) { 7613 pr_err("Failed to create ALSA mute control: %d\n", rc); 7614 goto err_exit; 7615 } 7616 data->ctl_mute_id = &ctl_mute->id; 7617 7618 rc = snd_card_register(card); 7619 if (rc < 0) { 7620 pr_err("Failed to register ALSA card: %d\n", rc); 7621 goto err_exit; 7622 } 7623 7624 alsa_card = card; 7625 return 0; 7626 7627 err_exit: 7628 snd_card_free(card); 7629 return 1; 7630 } 7631 7632 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7633 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7634 7635 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7636 /* Whitelist volume level on all IBM by default */ 7637 { .vendor = PCI_VENDOR_ID_IBM, 7638 .bios = TPACPI_MATCH_ANY, 7639 .ec = TPACPI_MATCH_ANY, 7640 .quirks = TPACPI_VOL_Q_LEVEL }, 7641 7642 /* Lenovo models with volume control (needs confirmation) */ 7643 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7644 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7645 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7646 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7647 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7648 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7649 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7650 7651 /* Whitelist mute-only on all Lenovo by default */ 7652 { .vendor = PCI_VENDOR_ID_LENOVO, 7653 .bios = TPACPI_MATCH_ANY, 7654 .ec = TPACPI_MATCH_ANY, 7655 .quirks = TPACPI_VOL_Q_MUTEONLY } 7656 }; 7657 7658 static int __init volume_init(struct ibm_init_struct *iibm) 7659 { 7660 unsigned long quirks; 7661 int rc; 7662 7663 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7664 7665 mutex_init(&volume_mutex); 7666 7667 /* 7668 * Check for module parameter bogosity, note that we 7669 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7670 * able to detect "unspecified" 7671 */ 7672 if (volume_mode > TPACPI_VOL_MODE_MAX) 7673 return -EINVAL; 7674 7675 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7676 pr_err("UCMS step volume mode not implemented, please contact %s\n", 7677 TPACPI_MAIL); 7678 return 1; 7679 } 7680 7681 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7682 return -EINVAL; 7683 7684 /* 7685 * The ALSA mixer is our primary interface. 7686 * When disabled, don't install the subdriver at all 7687 */ 7688 if (!alsa_enable) { 7689 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7690 "ALSA mixer disabled by parameter, not loading volume subdriver...\n"); 7691 return 1; 7692 } 7693 7694 quirks = tpacpi_check_quirks(volume_quirk_table, 7695 ARRAY_SIZE(volume_quirk_table)); 7696 7697 switch (volume_capabilities) { 7698 case TPACPI_VOL_CAP_AUTO: 7699 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7700 tp_features.mixer_no_level_control = 1; 7701 else if (quirks & TPACPI_VOL_Q_LEVEL) 7702 tp_features.mixer_no_level_control = 0; 7703 else 7704 return 1; /* no mixer */ 7705 break; 7706 case TPACPI_VOL_CAP_VOLMUTE: 7707 tp_features.mixer_no_level_control = 0; 7708 break; 7709 case TPACPI_VOL_CAP_MUTEONLY: 7710 tp_features.mixer_no_level_control = 1; 7711 break; 7712 default: 7713 return 1; 7714 } 7715 7716 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7717 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7718 "using user-supplied volume_capabilities=%d\n", 7719 volume_capabilities); 7720 7721 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7722 volume_mode == TPACPI_VOL_MODE_MAX) { 7723 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7724 7725 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7726 "driver auto-selected volume_mode=%d\n", 7727 volume_mode); 7728 } else { 7729 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7730 "using user-supplied volume_mode=%d\n", 7731 volume_mode); 7732 } 7733 7734 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7735 "mute is supported, volume control is %s\n", 7736 str_supported(!tp_features.mixer_no_level_control)); 7737 7738 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7739 software_mute_active = true; 7740 } else { 7741 rc = volume_create_alsa_mixer(); 7742 if (rc) { 7743 pr_err("Could not create the ALSA mixer interface\n"); 7744 return rc; 7745 } 7746 7747 pr_info("Console audio control enabled, mode: %s\n", 7748 (volume_control_allowed) ? 7749 "override (read/write)" : 7750 "monitor (read only)"); 7751 } 7752 7753 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7754 "registering volume hotkeys as change notification\n"); 7755 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7756 | TP_ACPI_HKEY_VOLUP_MASK 7757 | TP_ACPI_HKEY_VOLDWN_MASK 7758 | TP_ACPI_HKEY_MUTE_MASK); 7759 7760 return 0; 7761 } 7762 7763 static int volume_read(struct seq_file *m) 7764 { 7765 u8 status; 7766 7767 if (volume_get_status(&status) < 0) { 7768 seq_printf(m, "level:\t\tunreadable\n"); 7769 } else { 7770 if (tp_features.mixer_no_level_control) 7771 seq_printf(m, "level:\t\tunsupported\n"); 7772 else 7773 seq_printf(m, "level:\t\t%d\n", 7774 status & TP_EC_AUDIO_LVL_MSK); 7775 7776 seq_printf(m, "mute:\t\t%s\n", 7777 onoff(status, TP_EC_AUDIO_MUTESW)); 7778 7779 if (volume_control_allowed) { 7780 seq_printf(m, "commands:\tunmute, mute\n"); 7781 if (!tp_features.mixer_no_level_control) { 7782 seq_printf(m, "commands:\tup, down\n"); 7783 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7784 TP_EC_VOLUME_MAX); 7785 } 7786 } 7787 } 7788 7789 return 0; 7790 } 7791 7792 static int volume_write(char *buf) 7793 { 7794 u8 s; 7795 u8 new_level, new_mute; 7796 int l; 7797 char *cmd; 7798 int rc; 7799 7800 /* 7801 * We do allow volume control at driver startup, so that the 7802 * user can set initial state through the volume=... parameter hack. 7803 */ 7804 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7805 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7806 tp_warned.volume_ctrl_forbidden = 1; 7807 pr_notice("Console audio control in monitor mode, changes are not allowed\n"); 7808 pr_notice("Use the volume_control=1 module parameter to enable volume control\n"); 7809 } 7810 return -EPERM; 7811 } 7812 7813 rc = volume_get_status(&s); 7814 if (rc < 0) 7815 return rc; 7816 7817 new_level = s & TP_EC_AUDIO_LVL_MSK; 7818 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7819 7820 while ((cmd = next_cmd(&buf))) { 7821 if (!tp_features.mixer_no_level_control) { 7822 if (strlencmp(cmd, "up") == 0) { 7823 if (new_mute) 7824 new_mute = 0; 7825 else if (new_level < TP_EC_VOLUME_MAX) 7826 new_level++; 7827 continue; 7828 } else if (strlencmp(cmd, "down") == 0) { 7829 if (new_mute) 7830 new_mute = 0; 7831 else if (new_level > 0) 7832 new_level--; 7833 continue; 7834 } else if (sscanf(cmd, "level %u", &l) == 1 && 7835 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7836 new_level = l; 7837 continue; 7838 } 7839 } 7840 if (strlencmp(cmd, "mute") == 0) 7841 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7842 else if (strlencmp(cmd, "unmute") == 0) 7843 new_mute = 0; 7844 else 7845 return -EINVAL; 7846 } 7847 7848 if (tp_features.mixer_no_level_control) { 7849 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7850 new_mute ? "" : "un"); 7851 rc = volume_set_mute(!!new_mute); 7852 } else { 7853 tpacpi_disclose_usertask("procfs volume", 7854 "%smute and set level to %d\n", 7855 new_mute ? "" : "un", new_level); 7856 rc = volume_set_status(new_mute | new_level); 7857 } 7858 volume_alsa_notify_change(); 7859 7860 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7861 } 7862 7863 static struct ibm_struct volume_driver_data = { 7864 .name = "volume", 7865 .read = volume_read, 7866 .write = volume_write, 7867 .exit = volume_exit, 7868 .suspend = volume_suspend, 7869 .resume = volume_resume, 7870 .shutdown = volume_shutdown, 7871 }; 7872 7873 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7874 7875 #define alsa_card NULL 7876 7877 static inline void volume_alsa_notify_change(void) 7878 { 7879 } 7880 7881 static int __init volume_init(struct ibm_init_struct *iibm) 7882 { 7883 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7884 7885 return 1; 7886 } 7887 7888 static struct ibm_struct volume_driver_data = { 7889 .name = "volume", 7890 }; 7891 7892 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7893 7894 /************************************************************************* 7895 * Fan subdriver 7896 */ 7897 7898 /* 7899 * FAN ACCESS MODES 7900 * 7901 * TPACPI_FAN_RD_ACPI_GFAN: 7902 * ACPI GFAN method: returns fan level 7903 * 7904 * see TPACPI_FAN_WR_ACPI_SFAN 7905 * EC 0x2f (HFSP) not available if GFAN exists 7906 * 7907 * TPACPI_FAN_WR_ACPI_SFAN: 7908 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7909 * 7910 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7911 * it for writing. 7912 * 7913 * TPACPI_FAN_WR_TPEC: 7914 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7915 * Supported on almost all ThinkPads 7916 * 7917 * Fan speed changes of any sort (including those caused by the 7918 * disengaged mode) are usually done slowly by the firmware as the 7919 * maximum amount of fan duty cycle change per second seems to be 7920 * limited. 7921 * 7922 * Reading is not available if GFAN exists. 7923 * Writing is not available if SFAN exists. 7924 * 7925 * Bits 7926 * 7 automatic mode engaged; 7927 * (default operation mode of the ThinkPad) 7928 * fan level is ignored in this mode. 7929 * 6 full speed mode (takes precedence over bit 7); 7930 * not available on all thinkpads. May disable 7931 * the tachometer while the fan controller ramps up 7932 * the speed (which can take up to a few *minutes*). 7933 * Speeds up fan to 100% duty-cycle, which is far above 7934 * the standard RPM levels. It is not impossible that 7935 * it could cause hardware damage. 7936 * 5-3 unused in some models. Extra bits for fan level 7937 * in others, but still useless as all values above 7938 * 7 map to the same speed as level 7 in these models. 7939 * 2-0 fan level (0..7 usually) 7940 * 0x00 = stop 7941 * 0x07 = max (set when temperatures critical) 7942 * Some ThinkPads may have other levels, see 7943 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7944 * 7945 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7946 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7947 * does so, its initial value is meaningless (0x07). 7948 * 7949 * For firmware bugs, refer to: 7950 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7951 * 7952 * ---- 7953 * 7954 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7955 * Main fan tachometer reading (in RPM) 7956 * 7957 * This register is present on all ThinkPads with a new-style EC, and 7958 * it is known not to be present on the A21m/e, and T22, as there is 7959 * something else in offset 0x84 according to the ACPI DSDT. Other 7960 * ThinkPads from this same time period (and earlier) probably lack the 7961 * tachometer as well. 7962 * 7963 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7964 * was never fixed by IBM to report the EC firmware version string 7965 * probably support the tachometer (like the early X models), so 7966 * detecting it is quite hard. We need more data to know for sure. 7967 * 7968 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7969 * might result. 7970 * 7971 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7972 * mode. 7973 * 7974 * For firmware bugs, refer to: 7975 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7976 * 7977 * ---- 7978 * 7979 * ThinkPad EC register 0x31 bit 0 (only on select models) 7980 * 7981 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7982 * show the speed of the main fan. When bit 0 of EC register 0x31 7983 * is one, the tachometer registers show the speed of the auxiliary 7984 * fan. 7985 * 7986 * Fan control seems to affect both fans, regardless of the state 7987 * of this bit. 7988 * 7989 * So far, only the firmware for the X60/X61 non-tablet versions 7990 * seem to support this (firmware TP-7M). 7991 * 7992 * TPACPI_FAN_WR_ACPI_FANS: 7993 * ThinkPad X31, X40, X41. Not available in the X60. 7994 * 7995 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7996 * high speed. ACPI DSDT seems to map these three speeds to levels 7997 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7998 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7999 * 8000 * The speeds are stored on handles 8001 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 8002 * 8003 * There are three default speed sets, accessible as handles: 8004 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 8005 * 8006 * ACPI DSDT switches which set is in use depending on various 8007 * factors. 8008 * 8009 * TPACPI_FAN_WR_TPEC is also available and should be used to 8010 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 8011 * but the ACPI tables just mention level 7. 8012 */ 8013 8014 enum { /* Fan control constants */ 8015 fan_status_offset = 0x2f, /* EC register 0x2f */ 8016 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 8017 * 0x84 must be read before 0x85 */ 8018 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 8019 bit 0 selects which fan is active */ 8020 8021 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 8022 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 8023 8024 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 8025 }; 8026 8027 enum fan_status_access_mode { 8028 TPACPI_FAN_NONE = 0, /* No fan status or control */ 8029 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 8030 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 8031 }; 8032 8033 enum fan_control_access_mode { 8034 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 8035 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 8036 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 8037 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 8038 }; 8039 8040 enum fan_control_commands { 8041 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 8042 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 8043 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 8044 * and also watchdog cmd */ 8045 }; 8046 8047 static bool fan_control_allowed; 8048 8049 static enum fan_status_access_mode fan_status_access_mode; 8050 static enum fan_control_access_mode fan_control_access_mode; 8051 static enum fan_control_commands fan_control_commands; 8052 8053 static u8 fan_control_initial_status; 8054 static u8 fan_control_desired_level; 8055 static u8 fan_control_resume_level; 8056 static int fan_watchdog_maxinterval; 8057 8058 static struct mutex fan_mutex; 8059 8060 static void fan_watchdog_fire(struct work_struct *ignored); 8061 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 8062 8063 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 8064 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 8065 "\\FSPD", /* 600e/x, 770e, 770x */ 8066 ); /* all others */ 8067 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 8068 "JFNS", /* 770x-JL */ 8069 ); /* all others */ 8070 8071 /* 8072 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 8073 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 8074 * be in auto mode (0x80). 8075 * 8076 * This is corrected by any write to HFSP either by the driver, or 8077 * by the firmware. 8078 * 8079 * We assume 0x07 really means auto mode while this quirk is active, 8080 * as this is far more likely than the ThinkPad being in level 7, 8081 * which is only used by the firmware during thermal emergencies. 8082 * 8083 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 8084 * TP-70 (T43, R52), which are known to be buggy. 8085 */ 8086 8087 static void fan_quirk1_setup(void) 8088 { 8089 if (fan_control_initial_status == 0x07) { 8090 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n"); 8091 tp_features.fan_ctrl_status_undef = 1; 8092 } 8093 } 8094 8095 static void fan_quirk1_handle(u8 *fan_status) 8096 { 8097 if (unlikely(tp_features.fan_ctrl_status_undef)) { 8098 if (*fan_status != fan_control_initial_status) { 8099 /* something changed the HFSP regisnter since 8100 * driver init time, so it is not undefined 8101 * anymore */ 8102 tp_features.fan_ctrl_status_undef = 0; 8103 } else { 8104 /* Return most likely status. In fact, it 8105 * might be the only possible status */ 8106 *fan_status = TP_EC_FAN_AUTO; 8107 } 8108 } 8109 } 8110 8111 /* Select main fan on X60/X61, NOOP on others */ 8112 static bool fan_select_fan1(void) 8113 { 8114 if (tp_features.second_fan) { 8115 u8 val; 8116 8117 if (ec_read(fan_select_offset, &val) < 0) 8118 return false; 8119 val &= 0xFEU; 8120 if (ec_write(fan_select_offset, val) < 0) 8121 return false; 8122 } 8123 return true; 8124 } 8125 8126 /* Select secondary fan on X60/X61 */ 8127 static bool fan_select_fan2(void) 8128 { 8129 u8 val; 8130 8131 if (!tp_features.second_fan) 8132 return false; 8133 8134 if (ec_read(fan_select_offset, &val) < 0) 8135 return false; 8136 val |= 0x01U; 8137 if (ec_write(fan_select_offset, val) < 0) 8138 return false; 8139 8140 return true; 8141 } 8142 8143 /* 8144 * Call with fan_mutex held 8145 */ 8146 static void fan_update_desired_level(u8 status) 8147 { 8148 if ((status & 8149 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8150 if (status > 7) 8151 fan_control_desired_level = 7; 8152 else 8153 fan_control_desired_level = status; 8154 } 8155 } 8156 8157 static int fan_get_status(u8 *status) 8158 { 8159 u8 s; 8160 8161 /* TODO: 8162 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8163 8164 switch (fan_status_access_mode) { 8165 case TPACPI_FAN_RD_ACPI_GFAN: { 8166 /* 570, 600e/x, 770e, 770x */ 8167 int res; 8168 8169 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8170 return -EIO; 8171 8172 if (likely(status)) 8173 *status = res & 0x07; 8174 8175 break; 8176 } 8177 case TPACPI_FAN_RD_TPEC: 8178 /* all except 570, 600e/x, 770e, 770x */ 8179 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8180 return -EIO; 8181 8182 if (likely(status)) { 8183 *status = s; 8184 fan_quirk1_handle(status); 8185 } 8186 8187 break; 8188 8189 default: 8190 return -ENXIO; 8191 } 8192 8193 return 0; 8194 } 8195 8196 static int fan_get_status_safe(u8 *status) 8197 { 8198 int rc; 8199 u8 s; 8200 8201 if (mutex_lock_killable(&fan_mutex)) 8202 return -ERESTARTSYS; 8203 rc = fan_get_status(&s); 8204 if (!rc) 8205 fan_update_desired_level(s); 8206 mutex_unlock(&fan_mutex); 8207 8208 if (rc) 8209 return rc; 8210 if (status) 8211 *status = s; 8212 8213 return 0; 8214 } 8215 8216 static int fan_get_speed(unsigned int *speed) 8217 { 8218 u8 hi, lo; 8219 8220 switch (fan_status_access_mode) { 8221 case TPACPI_FAN_RD_TPEC: 8222 /* all except 570, 600e/x, 770e, 770x */ 8223 if (unlikely(!fan_select_fan1())) 8224 return -EIO; 8225 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8226 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8227 return -EIO; 8228 8229 if (likely(speed)) 8230 *speed = (hi << 8) | lo; 8231 8232 break; 8233 8234 default: 8235 return -ENXIO; 8236 } 8237 8238 return 0; 8239 } 8240 8241 static int fan2_get_speed(unsigned int *speed) 8242 { 8243 u8 hi, lo; 8244 bool rc; 8245 8246 switch (fan_status_access_mode) { 8247 case TPACPI_FAN_RD_TPEC: 8248 /* all except 570, 600e/x, 770e, 770x */ 8249 if (unlikely(!fan_select_fan2())) 8250 return -EIO; 8251 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8252 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8253 fan_select_fan1(); /* play it safe */ 8254 if (rc) 8255 return -EIO; 8256 8257 if (likely(speed)) 8258 *speed = (hi << 8) | lo; 8259 8260 break; 8261 8262 default: 8263 return -ENXIO; 8264 } 8265 8266 return 0; 8267 } 8268 8269 static int fan_set_level(int level) 8270 { 8271 if (!fan_control_allowed) 8272 return -EPERM; 8273 8274 switch (fan_control_access_mode) { 8275 case TPACPI_FAN_WR_ACPI_SFAN: 8276 if (level >= 0 && level <= 7) { 8277 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8278 return -EIO; 8279 } else 8280 return -EINVAL; 8281 break; 8282 8283 case TPACPI_FAN_WR_ACPI_FANS: 8284 case TPACPI_FAN_WR_TPEC: 8285 if (!(level & TP_EC_FAN_AUTO) && 8286 !(level & TP_EC_FAN_FULLSPEED) && 8287 ((level < 0) || (level > 7))) 8288 return -EINVAL; 8289 8290 /* safety net should the EC not support AUTO 8291 * or FULLSPEED mode bits and just ignore them */ 8292 if (level & TP_EC_FAN_FULLSPEED) 8293 level |= 7; /* safety min speed 7 */ 8294 else if (level & TP_EC_FAN_AUTO) 8295 level |= 4; /* safety min speed 4 */ 8296 8297 if (!acpi_ec_write(fan_status_offset, level)) 8298 return -EIO; 8299 else 8300 tp_features.fan_ctrl_status_undef = 0; 8301 break; 8302 8303 default: 8304 return -ENXIO; 8305 } 8306 8307 vdbg_printk(TPACPI_DBG_FAN, 8308 "fan control: set fan control register to 0x%02x\n", level); 8309 return 0; 8310 } 8311 8312 static int fan_set_level_safe(int level) 8313 { 8314 int rc; 8315 8316 if (!fan_control_allowed) 8317 return -EPERM; 8318 8319 if (mutex_lock_killable(&fan_mutex)) 8320 return -ERESTARTSYS; 8321 8322 if (level == TPACPI_FAN_LAST_LEVEL) 8323 level = fan_control_desired_level; 8324 8325 rc = fan_set_level(level); 8326 if (!rc) 8327 fan_update_desired_level(level); 8328 8329 mutex_unlock(&fan_mutex); 8330 return rc; 8331 } 8332 8333 static int fan_set_enable(void) 8334 { 8335 u8 s; 8336 int rc; 8337 8338 if (!fan_control_allowed) 8339 return -EPERM; 8340 8341 if (mutex_lock_killable(&fan_mutex)) 8342 return -ERESTARTSYS; 8343 8344 switch (fan_control_access_mode) { 8345 case TPACPI_FAN_WR_ACPI_FANS: 8346 case TPACPI_FAN_WR_TPEC: 8347 rc = fan_get_status(&s); 8348 if (rc < 0) 8349 break; 8350 8351 /* Don't go out of emergency fan mode */ 8352 if (s != 7) { 8353 s &= 0x07; 8354 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8355 } 8356 8357 if (!acpi_ec_write(fan_status_offset, s)) 8358 rc = -EIO; 8359 else { 8360 tp_features.fan_ctrl_status_undef = 0; 8361 rc = 0; 8362 } 8363 break; 8364 8365 case TPACPI_FAN_WR_ACPI_SFAN: 8366 rc = fan_get_status(&s); 8367 if (rc < 0) 8368 break; 8369 8370 s &= 0x07; 8371 8372 /* Set fan to at least level 4 */ 8373 s |= 4; 8374 8375 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8376 rc = -EIO; 8377 else 8378 rc = 0; 8379 break; 8380 8381 default: 8382 rc = -ENXIO; 8383 } 8384 8385 mutex_unlock(&fan_mutex); 8386 8387 if (!rc) 8388 vdbg_printk(TPACPI_DBG_FAN, 8389 "fan control: set fan control register to 0x%02x\n", 8390 s); 8391 return rc; 8392 } 8393 8394 static int fan_set_disable(void) 8395 { 8396 int rc; 8397 8398 if (!fan_control_allowed) 8399 return -EPERM; 8400 8401 if (mutex_lock_killable(&fan_mutex)) 8402 return -ERESTARTSYS; 8403 8404 rc = 0; 8405 switch (fan_control_access_mode) { 8406 case TPACPI_FAN_WR_ACPI_FANS: 8407 case TPACPI_FAN_WR_TPEC: 8408 if (!acpi_ec_write(fan_status_offset, 0x00)) 8409 rc = -EIO; 8410 else { 8411 fan_control_desired_level = 0; 8412 tp_features.fan_ctrl_status_undef = 0; 8413 } 8414 break; 8415 8416 case TPACPI_FAN_WR_ACPI_SFAN: 8417 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8418 rc = -EIO; 8419 else 8420 fan_control_desired_level = 0; 8421 break; 8422 8423 default: 8424 rc = -ENXIO; 8425 } 8426 8427 if (!rc) 8428 vdbg_printk(TPACPI_DBG_FAN, 8429 "fan control: set fan control register to 0\n"); 8430 8431 mutex_unlock(&fan_mutex); 8432 return rc; 8433 } 8434 8435 static int fan_set_speed(int speed) 8436 { 8437 int rc; 8438 8439 if (!fan_control_allowed) 8440 return -EPERM; 8441 8442 if (mutex_lock_killable(&fan_mutex)) 8443 return -ERESTARTSYS; 8444 8445 rc = 0; 8446 switch (fan_control_access_mode) { 8447 case TPACPI_FAN_WR_ACPI_FANS: 8448 if (speed >= 0 && speed <= 65535) { 8449 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8450 speed, speed, speed)) 8451 rc = -EIO; 8452 } else 8453 rc = -EINVAL; 8454 break; 8455 8456 default: 8457 rc = -ENXIO; 8458 } 8459 8460 mutex_unlock(&fan_mutex); 8461 return rc; 8462 } 8463 8464 static void fan_watchdog_reset(void) 8465 { 8466 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8467 return; 8468 8469 if (fan_watchdog_maxinterval > 0 && 8470 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8471 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8472 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8473 else 8474 cancel_delayed_work(&fan_watchdog_task); 8475 } 8476 8477 static void fan_watchdog_fire(struct work_struct *ignored) 8478 { 8479 int rc; 8480 8481 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8482 return; 8483 8484 pr_notice("fan watchdog: enabling fan\n"); 8485 rc = fan_set_enable(); 8486 if (rc < 0) { 8487 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n", 8488 rc); 8489 /* reschedule for later */ 8490 fan_watchdog_reset(); 8491 } 8492 } 8493 8494 /* 8495 * SYSFS fan layout: hwmon compatible (device) 8496 * 8497 * pwm*_enable: 8498 * 0: "disengaged" mode 8499 * 1: manual mode 8500 * 2: native EC "auto" mode (recommended, hardware default) 8501 * 8502 * pwm*: set speed in manual mode, ignored otherwise. 8503 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8504 * interpolation. 8505 * 8506 * fan*_input: tachometer reading, RPM 8507 * 8508 * 8509 * SYSFS fan layout: extensions 8510 * 8511 * fan_watchdog (driver): 8512 * fan watchdog interval in seconds, 0 disables (default), max 120 8513 */ 8514 8515 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8516 static ssize_t fan_pwm1_enable_show(struct device *dev, 8517 struct device_attribute *attr, 8518 char *buf) 8519 { 8520 int res, mode; 8521 u8 status; 8522 8523 res = fan_get_status_safe(&status); 8524 if (res) 8525 return res; 8526 8527 if (status & TP_EC_FAN_FULLSPEED) { 8528 mode = 0; 8529 } else if (status & TP_EC_FAN_AUTO) { 8530 mode = 2; 8531 } else 8532 mode = 1; 8533 8534 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8535 } 8536 8537 static ssize_t fan_pwm1_enable_store(struct device *dev, 8538 struct device_attribute *attr, 8539 const char *buf, size_t count) 8540 { 8541 unsigned long t; 8542 int res, level; 8543 8544 if (parse_strtoul(buf, 2, &t)) 8545 return -EINVAL; 8546 8547 tpacpi_disclose_usertask("hwmon pwm1_enable", 8548 "set fan mode to %lu\n", t); 8549 8550 switch (t) { 8551 case 0: 8552 level = TP_EC_FAN_FULLSPEED; 8553 break; 8554 case 1: 8555 level = TPACPI_FAN_LAST_LEVEL; 8556 break; 8557 case 2: 8558 level = TP_EC_FAN_AUTO; 8559 break; 8560 case 3: 8561 /* reserved for software-controlled auto mode */ 8562 return -ENOSYS; 8563 default: 8564 return -EINVAL; 8565 } 8566 8567 res = fan_set_level_safe(level); 8568 if (res == -ENXIO) 8569 return -EINVAL; 8570 else if (res < 0) 8571 return res; 8572 8573 fan_watchdog_reset(); 8574 8575 return count; 8576 } 8577 8578 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8579 fan_pwm1_enable_show, fan_pwm1_enable_store); 8580 8581 /* sysfs fan pwm1 ------------------------------------------------------ */ 8582 static ssize_t fan_pwm1_show(struct device *dev, 8583 struct device_attribute *attr, 8584 char *buf) 8585 { 8586 int res; 8587 u8 status; 8588 8589 res = fan_get_status_safe(&status); 8590 if (res) 8591 return res; 8592 8593 if ((status & 8594 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8595 status = fan_control_desired_level; 8596 8597 if (status > 7) 8598 status = 7; 8599 8600 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8601 } 8602 8603 static ssize_t fan_pwm1_store(struct device *dev, 8604 struct device_attribute *attr, 8605 const char *buf, size_t count) 8606 { 8607 unsigned long s; 8608 int rc; 8609 u8 status, newlevel; 8610 8611 if (parse_strtoul(buf, 255, &s)) 8612 return -EINVAL; 8613 8614 tpacpi_disclose_usertask("hwmon pwm1", 8615 "set fan speed to %lu\n", s); 8616 8617 /* scale down from 0-255 to 0-7 */ 8618 newlevel = (s >> 5) & 0x07; 8619 8620 if (mutex_lock_killable(&fan_mutex)) 8621 return -ERESTARTSYS; 8622 8623 rc = fan_get_status(&status); 8624 if (!rc && (status & 8625 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8626 rc = fan_set_level(newlevel); 8627 if (rc == -ENXIO) 8628 rc = -EINVAL; 8629 else if (!rc) { 8630 fan_update_desired_level(newlevel); 8631 fan_watchdog_reset(); 8632 } 8633 } 8634 8635 mutex_unlock(&fan_mutex); 8636 return (rc) ? rc : count; 8637 } 8638 8639 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8640 8641 /* sysfs fan fan1_input ------------------------------------------------ */ 8642 static ssize_t fan_fan1_input_show(struct device *dev, 8643 struct device_attribute *attr, 8644 char *buf) 8645 { 8646 int res; 8647 unsigned int speed; 8648 8649 res = fan_get_speed(&speed); 8650 if (res < 0) 8651 return res; 8652 8653 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8654 } 8655 8656 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8657 8658 /* sysfs fan fan2_input ------------------------------------------------ */ 8659 static ssize_t fan_fan2_input_show(struct device *dev, 8660 struct device_attribute *attr, 8661 char *buf) 8662 { 8663 int res; 8664 unsigned int speed; 8665 8666 res = fan2_get_speed(&speed); 8667 if (res < 0) 8668 return res; 8669 8670 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8671 } 8672 8673 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8674 8675 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8676 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf) 8677 { 8678 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8679 } 8680 8681 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf, 8682 size_t count) 8683 { 8684 unsigned long t; 8685 8686 if (parse_strtoul(buf, 120, &t)) 8687 return -EINVAL; 8688 8689 if (!fan_control_allowed) 8690 return -EPERM; 8691 8692 fan_watchdog_maxinterval = t; 8693 fan_watchdog_reset(); 8694 8695 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8696 8697 return count; 8698 } 8699 static DRIVER_ATTR_RW(fan_watchdog); 8700 8701 /* --------------------------------------------------------------------- */ 8702 static struct attribute *fan_attributes[] = { 8703 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8704 &dev_attr_fan1_input.attr, 8705 NULL, /* for fan2_input */ 8706 NULL 8707 }; 8708 8709 static const struct attribute_group fan_attr_group = { 8710 .attrs = fan_attributes, 8711 }; 8712 8713 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8714 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8715 8716 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 8717 { .vendor = PCI_VENDOR_ID_IBM, \ 8718 .bios = TPACPI_MATCH_ANY, \ 8719 .ec = TPID(__id1, __id2), \ 8720 .quirks = __quirks } 8721 8722 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 8723 { .vendor = PCI_VENDOR_ID_LENOVO, \ 8724 .bios = TPACPI_MATCH_ANY, \ 8725 .ec = TPID(__id1, __id2), \ 8726 .quirks = __quirks } 8727 8728 #define TPACPI_FAN_QB(__id1, __id2, __quirks) \ 8729 { .vendor = PCI_VENDOR_ID_LENOVO, \ 8730 .bios = TPID(__id1, __id2), \ 8731 .ec = TPACPI_MATCH_ANY, \ 8732 .quirks = __quirks } 8733 8734 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8735 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 8736 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 8737 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 8738 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 8739 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 8740 TPACPI_FAN_QB('N', '1', TPACPI_FAN_2FAN), 8741 }; 8742 8743 #undef TPACPI_FAN_QL 8744 #undef TPACPI_FAN_QI 8745 #undef TPACPI_FAN_QB 8746 8747 static int __init fan_init(struct ibm_init_struct *iibm) 8748 { 8749 int rc; 8750 unsigned long quirks; 8751 8752 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8753 "initializing fan subdriver\n"); 8754 8755 mutex_init(&fan_mutex); 8756 fan_status_access_mode = TPACPI_FAN_NONE; 8757 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8758 fan_control_commands = 0; 8759 fan_watchdog_maxinterval = 0; 8760 tp_features.fan_ctrl_status_undef = 0; 8761 tp_features.second_fan = 0; 8762 fan_control_desired_level = 7; 8763 8764 if (tpacpi_is_ibm()) { 8765 TPACPI_ACPIHANDLE_INIT(fans); 8766 TPACPI_ACPIHANDLE_INIT(gfan); 8767 TPACPI_ACPIHANDLE_INIT(sfan); 8768 } 8769 8770 quirks = tpacpi_check_quirks(fan_quirk_table, 8771 ARRAY_SIZE(fan_quirk_table)); 8772 8773 if (gfan_handle) { 8774 /* 570, 600e/x, 770e, 770x */ 8775 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8776 } else { 8777 /* all other ThinkPads: note that even old-style 8778 * ThinkPad ECs supports the fan control register */ 8779 if (likely(acpi_ec_read(fan_status_offset, 8780 &fan_control_initial_status))) { 8781 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8782 if (quirks & TPACPI_FAN_Q1) 8783 fan_quirk1_setup(); 8784 if (quirks & TPACPI_FAN_2FAN) { 8785 tp_features.second_fan = 1; 8786 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8787 "secondary fan support enabled\n"); 8788 } 8789 } else { 8790 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n"); 8791 return 1; 8792 } 8793 } 8794 8795 if (sfan_handle) { 8796 /* 570, 770x-JL */ 8797 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8798 fan_control_commands |= 8799 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8800 } else { 8801 if (!gfan_handle) { 8802 /* gfan without sfan means no fan control */ 8803 /* all other models implement TP EC 0x2f control */ 8804 8805 if (fans_handle) { 8806 /* X31, X40, X41 */ 8807 fan_control_access_mode = 8808 TPACPI_FAN_WR_ACPI_FANS; 8809 fan_control_commands |= 8810 TPACPI_FAN_CMD_SPEED | 8811 TPACPI_FAN_CMD_LEVEL | 8812 TPACPI_FAN_CMD_ENABLE; 8813 } else { 8814 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8815 fan_control_commands |= 8816 TPACPI_FAN_CMD_LEVEL | 8817 TPACPI_FAN_CMD_ENABLE; 8818 } 8819 } 8820 } 8821 8822 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8823 "fan is %s, modes %d, %d\n", 8824 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8825 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8826 fan_status_access_mode, fan_control_access_mode); 8827 8828 /* fan control master switch */ 8829 if (!fan_control_allowed) { 8830 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8831 fan_control_commands = 0; 8832 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8833 "fan control features disabled by parameter\n"); 8834 } 8835 8836 /* update fan_control_desired_level */ 8837 if (fan_status_access_mode != TPACPI_FAN_NONE) 8838 fan_get_status_safe(NULL); 8839 8840 if (fan_status_access_mode != TPACPI_FAN_NONE || 8841 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8842 if (tp_features.second_fan) { 8843 /* attach second fan tachometer */ 8844 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8845 &dev_attr_fan2_input.attr; 8846 } 8847 rc = sysfs_create_group(&tpacpi_hwmon->kobj, 8848 &fan_attr_group); 8849 if (rc < 0) 8850 return rc; 8851 8852 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8853 &driver_attr_fan_watchdog); 8854 if (rc < 0) { 8855 sysfs_remove_group(&tpacpi_hwmon->kobj, 8856 &fan_attr_group); 8857 return rc; 8858 } 8859 return 0; 8860 } else 8861 return 1; 8862 } 8863 8864 static void fan_exit(void) 8865 { 8866 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8867 "cancelling any pending fan watchdog tasks\n"); 8868 8869 /* FIXME: can we really do this unconditionally? */ 8870 sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group); 8871 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8872 &driver_attr_fan_watchdog); 8873 8874 cancel_delayed_work(&fan_watchdog_task); 8875 flush_workqueue(tpacpi_wq); 8876 } 8877 8878 static void fan_suspend(void) 8879 { 8880 int rc; 8881 8882 if (!fan_control_allowed) 8883 return; 8884 8885 /* Store fan status in cache */ 8886 fan_control_resume_level = 0; 8887 rc = fan_get_status_safe(&fan_control_resume_level); 8888 if (rc < 0) 8889 pr_notice("failed to read fan level for later restore during resume: %d\n", 8890 rc); 8891 8892 /* if it is undefined, don't attempt to restore it. 8893 * KEEP THIS LAST */ 8894 if (tp_features.fan_ctrl_status_undef) 8895 fan_control_resume_level = 0; 8896 } 8897 8898 static void fan_resume(void) 8899 { 8900 u8 current_level = 7; 8901 bool do_set = false; 8902 int rc; 8903 8904 /* DSDT *always* updates status on resume */ 8905 tp_features.fan_ctrl_status_undef = 0; 8906 8907 if (!fan_control_allowed || 8908 !fan_control_resume_level || 8909 (fan_get_status_safe(¤t_level) < 0)) 8910 return; 8911 8912 switch (fan_control_access_mode) { 8913 case TPACPI_FAN_WR_ACPI_SFAN: 8914 /* never decrease fan level */ 8915 do_set = (fan_control_resume_level > current_level); 8916 break; 8917 case TPACPI_FAN_WR_ACPI_FANS: 8918 case TPACPI_FAN_WR_TPEC: 8919 /* never decrease fan level, scale is: 8920 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8921 * 8922 * We expect the firmware to set either 7 or AUTO, but we 8923 * handle FULLSPEED out of paranoia. 8924 * 8925 * So, we can safely only restore FULLSPEED or 7, anything 8926 * else could slow the fan. Restoring AUTO is useless, at 8927 * best that's exactly what the DSDT already set (it is the 8928 * slower it uses). 8929 * 8930 * Always keep in mind that the DSDT *will* have set the 8931 * fans to what the vendor supposes is the best level. We 8932 * muck with it only to speed the fan up. 8933 */ 8934 if (fan_control_resume_level != 7 && 8935 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8936 return; 8937 else 8938 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8939 (current_level != fan_control_resume_level); 8940 break; 8941 default: 8942 return; 8943 } 8944 if (do_set) { 8945 pr_notice("restoring fan level to 0x%02x\n", 8946 fan_control_resume_level); 8947 rc = fan_set_level_safe(fan_control_resume_level); 8948 if (rc < 0) 8949 pr_notice("failed to restore fan level: %d\n", rc); 8950 } 8951 } 8952 8953 static int fan_read(struct seq_file *m) 8954 { 8955 int rc; 8956 u8 status; 8957 unsigned int speed = 0; 8958 8959 switch (fan_status_access_mode) { 8960 case TPACPI_FAN_RD_ACPI_GFAN: 8961 /* 570, 600e/x, 770e, 770x */ 8962 rc = fan_get_status_safe(&status); 8963 if (rc < 0) 8964 return rc; 8965 8966 seq_printf(m, "status:\t\t%s\n" 8967 "level:\t\t%d\n", 8968 (status != 0) ? "enabled" : "disabled", status); 8969 break; 8970 8971 case TPACPI_FAN_RD_TPEC: 8972 /* all except 570, 600e/x, 770e, 770x */ 8973 rc = fan_get_status_safe(&status); 8974 if (rc < 0) 8975 return rc; 8976 8977 seq_printf(m, "status:\t\t%s\n", 8978 (status != 0) ? "enabled" : "disabled"); 8979 8980 rc = fan_get_speed(&speed); 8981 if (rc < 0) 8982 return rc; 8983 8984 seq_printf(m, "speed:\t\t%d\n", speed); 8985 8986 if (status & TP_EC_FAN_FULLSPEED) 8987 /* Disengaged mode takes precedence */ 8988 seq_printf(m, "level:\t\tdisengaged\n"); 8989 else if (status & TP_EC_FAN_AUTO) 8990 seq_printf(m, "level:\t\tauto\n"); 8991 else 8992 seq_printf(m, "level:\t\t%d\n", status); 8993 break; 8994 8995 case TPACPI_FAN_NONE: 8996 default: 8997 seq_printf(m, "status:\t\tnot supported\n"); 8998 } 8999 9000 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 9001 seq_printf(m, "commands:\tlevel <level>"); 9002 9003 switch (fan_control_access_mode) { 9004 case TPACPI_FAN_WR_ACPI_SFAN: 9005 seq_printf(m, " (<level> is 0-7)\n"); 9006 break; 9007 9008 default: 9009 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n"); 9010 break; 9011 } 9012 } 9013 9014 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 9015 seq_printf(m, "commands:\tenable, disable\n" 9016 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n"); 9017 9018 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 9019 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n"); 9020 9021 return 0; 9022 } 9023 9024 static int fan_write_cmd_level(const char *cmd, int *rc) 9025 { 9026 int level; 9027 9028 if (strlencmp(cmd, "level auto") == 0) 9029 level = TP_EC_FAN_AUTO; 9030 else if ((strlencmp(cmd, "level disengaged") == 0) | 9031 (strlencmp(cmd, "level full-speed") == 0)) 9032 level = TP_EC_FAN_FULLSPEED; 9033 else if (sscanf(cmd, "level %d", &level) != 1) 9034 return 0; 9035 9036 *rc = fan_set_level_safe(level); 9037 if (*rc == -ENXIO) 9038 pr_err("level command accepted for unsupported access mode %d\n", 9039 fan_control_access_mode); 9040 else if (!*rc) 9041 tpacpi_disclose_usertask("procfs fan", 9042 "set level to %d\n", level); 9043 9044 return 1; 9045 } 9046 9047 static int fan_write_cmd_enable(const char *cmd, int *rc) 9048 { 9049 if (strlencmp(cmd, "enable") != 0) 9050 return 0; 9051 9052 *rc = fan_set_enable(); 9053 if (*rc == -ENXIO) 9054 pr_err("enable command accepted for unsupported access mode %d\n", 9055 fan_control_access_mode); 9056 else if (!*rc) 9057 tpacpi_disclose_usertask("procfs fan", "enable\n"); 9058 9059 return 1; 9060 } 9061 9062 static int fan_write_cmd_disable(const char *cmd, int *rc) 9063 { 9064 if (strlencmp(cmd, "disable") != 0) 9065 return 0; 9066 9067 *rc = fan_set_disable(); 9068 if (*rc == -ENXIO) 9069 pr_err("disable command accepted for unsupported access mode %d\n", 9070 fan_control_access_mode); 9071 else if (!*rc) 9072 tpacpi_disclose_usertask("procfs fan", "disable\n"); 9073 9074 return 1; 9075 } 9076 9077 static int fan_write_cmd_speed(const char *cmd, int *rc) 9078 { 9079 int speed; 9080 9081 /* TODO: 9082 * Support speed <low> <medium> <high> ? */ 9083 9084 if (sscanf(cmd, "speed %d", &speed) != 1) 9085 return 0; 9086 9087 *rc = fan_set_speed(speed); 9088 if (*rc == -ENXIO) 9089 pr_err("speed command accepted for unsupported access mode %d\n", 9090 fan_control_access_mode); 9091 else if (!*rc) 9092 tpacpi_disclose_usertask("procfs fan", 9093 "set speed to %d\n", speed); 9094 9095 return 1; 9096 } 9097 9098 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 9099 { 9100 int interval; 9101 9102 if (sscanf(cmd, "watchdog %d", &interval) != 1) 9103 return 0; 9104 9105 if (interval < 0 || interval > 120) 9106 *rc = -EINVAL; 9107 else { 9108 fan_watchdog_maxinterval = interval; 9109 tpacpi_disclose_usertask("procfs fan", 9110 "set watchdog timer to %d\n", 9111 interval); 9112 } 9113 9114 return 1; 9115 } 9116 9117 static int fan_write(char *buf) 9118 { 9119 char *cmd; 9120 int rc = 0; 9121 9122 while (!rc && (cmd = next_cmd(&buf))) { 9123 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 9124 fan_write_cmd_level(cmd, &rc)) && 9125 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 9126 (fan_write_cmd_enable(cmd, &rc) || 9127 fan_write_cmd_disable(cmd, &rc) || 9128 fan_write_cmd_watchdog(cmd, &rc))) && 9129 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 9130 fan_write_cmd_speed(cmd, &rc)) 9131 ) 9132 rc = -EINVAL; 9133 else if (!rc) 9134 fan_watchdog_reset(); 9135 } 9136 9137 return rc; 9138 } 9139 9140 static struct ibm_struct fan_driver_data = { 9141 .name = "fan", 9142 .read = fan_read, 9143 .write = fan_write, 9144 .exit = fan_exit, 9145 .suspend = fan_suspend, 9146 .resume = fan_resume, 9147 }; 9148 9149 /************************************************************************* 9150 * Mute LED subdriver 9151 */ 9152 9153 9154 struct tp_led_table { 9155 acpi_string name; 9156 int on_value; 9157 int off_value; 9158 int state; 9159 }; 9160 9161 static struct tp_led_table led_tables[] = { 9162 [TPACPI_LED_MUTE] = { 9163 .name = "SSMS", 9164 .on_value = 1, 9165 .off_value = 0, 9166 }, 9167 [TPACPI_LED_MICMUTE] = { 9168 .name = "MMTS", 9169 .on_value = 2, 9170 .off_value = 0, 9171 }, 9172 }; 9173 9174 static int mute_led_on_off(struct tp_led_table *t, bool state) 9175 { 9176 acpi_handle temp; 9177 int output; 9178 9179 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9180 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9181 return -EIO; 9182 } 9183 9184 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9185 state ? t->on_value : t->off_value)) 9186 return -EIO; 9187 9188 t->state = state; 9189 return state; 9190 } 9191 9192 int tpacpi_led_set(int whichled, bool on) 9193 { 9194 struct tp_led_table *t; 9195 9196 if (whichled < 0 || whichled >= TPACPI_LED_MAX) 9197 return -EINVAL; 9198 9199 t = &led_tables[whichled]; 9200 if (t->state < 0 || t->state == on) 9201 return t->state; 9202 return mute_led_on_off(t, on); 9203 } 9204 EXPORT_SYMBOL_GPL(tpacpi_led_set); 9205 9206 static int mute_led_init(struct ibm_init_struct *iibm) 9207 { 9208 acpi_handle temp; 9209 int i; 9210 9211 for (i = 0; i < TPACPI_LED_MAX; i++) { 9212 struct tp_led_table *t = &led_tables[i]; 9213 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) 9214 mute_led_on_off(t, false); 9215 else 9216 t->state = -ENODEV; 9217 } 9218 return 0; 9219 } 9220 9221 static void mute_led_exit(void) 9222 { 9223 int i; 9224 9225 for (i = 0; i < TPACPI_LED_MAX; i++) 9226 tpacpi_led_set(i, false); 9227 } 9228 9229 static void mute_led_resume(void) 9230 { 9231 int i; 9232 9233 for (i = 0; i < TPACPI_LED_MAX; i++) { 9234 struct tp_led_table *t = &led_tables[i]; 9235 if (t->state >= 0) 9236 mute_led_on_off(t, t->state); 9237 } 9238 } 9239 9240 static struct ibm_struct mute_led_driver_data = { 9241 .name = "mute_led", 9242 .exit = mute_led_exit, 9243 .resume = mute_led_resume, 9244 }; 9245 9246 /* 9247 * Battery Wear Control Driver 9248 * Contact: Ognjen Galic <smclt30p@gmail.com> 9249 */ 9250 9251 /* Metadata */ 9252 9253 #define GET_START "BCTG" 9254 #define SET_START "BCCS" 9255 #define GET_STOP "BCSG" 9256 #define SET_STOP "BCSS" 9257 9258 #define START_ATTR "charge_start_threshold" 9259 #define STOP_ATTR "charge_stop_threshold" 9260 9261 enum { 9262 BAT_ANY = 0, 9263 BAT_PRIMARY = 1, 9264 BAT_SECONDARY = 2 9265 }; 9266 9267 enum { 9268 /* Error condition bit */ 9269 METHOD_ERR = BIT(31), 9270 }; 9271 9272 enum { 9273 /* This is used in the get/set helpers */ 9274 THRESHOLD_START, 9275 THRESHOLD_STOP, 9276 }; 9277 9278 struct tpacpi_battery_data { 9279 int charge_start; 9280 int start_support; 9281 int charge_stop; 9282 int stop_support; 9283 }; 9284 9285 struct tpacpi_battery_driver_data { 9286 struct tpacpi_battery_data batteries[3]; 9287 int individual_addressing; 9288 }; 9289 9290 static struct tpacpi_battery_driver_data battery_info; 9291 9292 /* ACPI helpers/functions/probes */ 9293 9294 /** 9295 * This evaluates a ACPI method call specific to the battery 9296 * ACPI extension. The specifics are that an error is marked 9297 * in the 32rd bit of the response, so we just check that here. 9298 */ 9299 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param) 9300 { 9301 int response; 9302 9303 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) { 9304 acpi_handle_err(hkey_handle, "%s: evaluate failed", method); 9305 return AE_ERROR; 9306 } 9307 if (response & METHOD_ERR) { 9308 acpi_handle_err(hkey_handle, 9309 "%s evaluated but flagged as error", method); 9310 return AE_ERROR; 9311 } 9312 *ret = response; 9313 return AE_OK; 9314 } 9315 9316 static int tpacpi_battery_get(int what, int battery, int *ret) 9317 { 9318 switch (what) { 9319 case THRESHOLD_START: 9320 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery)) 9321 return -ENODEV; 9322 9323 /* The value is in the low 8 bits of the response */ 9324 *ret = *ret & 0xFF; 9325 return 0; 9326 case THRESHOLD_STOP: 9327 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery)) 9328 return -ENODEV; 9329 /* Value is in lower 8 bits */ 9330 *ret = *ret & 0xFF; 9331 /* 9332 * On the stop value, if we return 0 that 9333 * does not make any sense. 0 means Default, which 9334 * means that charging stops at 100%, so we return 9335 * that. 9336 */ 9337 if (*ret == 0) 9338 *ret = 100; 9339 return 0; 9340 default: 9341 pr_crit("wrong parameter: %d", what); 9342 return -EINVAL; 9343 } 9344 } 9345 9346 static int tpacpi_battery_set(int what, int battery, int value) 9347 { 9348 int param, ret; 9349 /* The first 8 bits are the value of the threshold */ 9350 param = value; 9351 /* The battery ID is in bits 8-9, 2 bits */ 9352 param |= battery << 8; 9353 9354 switch (what) { 9355 case THRESHOLD_START: 9356 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) { 9357 pr_err("failed to set charge threshold on battery %d", 9358 battery); 9359 return -ENODEV; 9360 } 9361 return 0; 9362 case THRESHOLD_STOP: 9363 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) { 9364 pr_err("failed to set stop threshold: %d", battery); 9365 return -ENODEV; 9366 } 9367 return 0; 9368 default: 9369 pr_crit("wrong parameter: %d", what); 9370 return -EINVAL; 9371 } 9372 } 9373 9374 static int tpacpi_battery_probe(int battery) 9375 { 9376 int ret = 0; 9377 9378 memset(&battery_info.batteries[battery], 0, 9379 sizeof(battery_info.batteries[battery])); 9380 9381 /* 9382 * 1) Get the current start threshold 9383 * 2) Check for support 9384 * 3) Get the current stop threshold 9385 * 4) Check for support 9386 */ 9387 if (acpi_has_method(hkey_handle, GET_START)) { 9388 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { 9389 pr_err("Error probing battery %d\n", battery); 9390 return -ENODEV; 9391 } 9392 /* Individual addressing is in bit 9 */ 9393 if (ret & BIT(9)) 9394 battery_info.individual_addressing = true; 9395 /* Support is marked in bit 8 */ 9396 if (ret & BIT(8)) 9397 battery_info.batteries[battery].start_support = 1; 9398 else 9399 return -ENODEV; 9400 if (tpacpi_battery_get(THRESHOLD_START, battery, 9401 &battery_info.batteries[battery].charge_start)) { 9402 pr_err("Error probing battery %d\n", battery); 9403 return -ENODEV; 9404 } 9405 } 9406 if (acpi_has_method(hkey_handle, GET_STOP)) { 9407 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) { 9408 pr_err("Error probing battery stop; %d\n", battery); 9409 return -ENODEV; 9410 } 9411 /* Support is marked in bit 8 */ 9412 if (ret & BIT(8)) 9413 battery_info.batteries[battery].stop_support = 1; 9414 else 9415 return -ENODEV; 9416 if (tpacpi_battery_get(THRESHOLD_STOP, battery, 9417 &battery_info.batteries[battery].charge_stop)) { 9418 pr_err("Error probing battery stop: %d\n", battery); 9419 return -ENODEV; 9420 } 9421 } 9422 pr_info("battery %d registered (start %d, stop %d)", 9423 battery, 9424 battery_info.batteries[battery].charge_start, 9425 battery_info.batteries[battery].charge_stop); 9426 9427 return 0; 9428 } 9429 9430 /* General helper functions */ 9431 9432 static int tpacpi_battery_get_id(const char *battery_name) 9433 { 9434 9435 if (strcmp(battery_name, "BAT0") == 0 || 9436 tp_features.battery_force_primary) 9437 return BAT_PRIMARY; 9438 if (strcmp(battery_name, "BAT1") == 0) 9439 return BAT_SECONDARY; 9440 /* 9441 * If for some reason the battery is not BAT0 nor is it 9442 * BAT1, we will assume it's the default, first battery, 9443 * AKA primary. 9444 */ 9445 pr_warn("unknown battery %s, assuming primary", battery_name); 9446 return BAT_PRIMARY; 9447 } 9448 9449 /* sysfs interface */ 9450 9451 static ssize_t tpacpi_battery_store(int what, 9452 struct device *dev, 9453 const char *buf, size_t count) 9454 { 9455 struct power_supply *supply = to_power_supply(dev); 9456 unsigned long value; 9457 int battery, rval; 9458 /* 9459 * Some systems have support for more than 9460 * one battery. If that is the case, 9461 * tpacpi_battery_probe marked that addressing 9462 * them individually is supported, so we do that 9463 * based on the device struct. 9464 * 9465 * On systems that are not supported, we assume 9466 * the primary as most of the ACPI calls fail 9467 * with "Any Battery" as the parameter. 9468 */ 9469 if (battery_info.individual_addressing) 9470 /* BAT_PRIMARY or BAT_SECONDARY */ 9471 battery = tpacpi_battery_get_id(supply->desc->name); 9472 else 9473 battery = BAT_PRIMARY; 9474 9475 rval = kstrtoul(buf, 10, &value); 9476 if (rval) 9477 return rval; 9478 9479 switch (what) { 9480 case THRESHOLD_START: 9481 if (!battery_info.batteries[battery].start_support) 9482 return -ENODEV; 9483 /* valid values are [0, 99] */ 9484 if (value < 0 || value > 99) 9485 return -EINVAL; 9486 if (value > battery_info.batteries[battery].charge_stop) 9487 return -EINVAL; 9488 if (tpacpi_battery_set(THRESHOLD_START, battery, value)) 9489 return -ENODEV; 9490 battery_info.batteries[battery].charge_start = value; 9491 return count; 9492 9493 case THRESHOLD_STOP: 9494 if (!battery_info.batteries[battery].stop_support) 9495 return -ENODEV; 9496 /* valid values are [1, 100] */ 9497 if (value < 1 || value > 100) 9498 return -EINVAL; 9499 if (value < battery_info.batteries[battery].charge_start) 9500 return -EINVAL; 9501 battery_info.batteries[battery].charge_stop = value; 9502 /* 9503 * When 100 is passed to stop, we need to flip 9504 * it to 0 as that the EC understands that as 9505 * "Default", which will charge to 100% 9506 */ 9507 if (value == 100) 9508 value = 0; 9509 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value)) 9510 return -EINVAL; 9511 return count; 9512 default: 9513 pr_crit("Wrong parameter: %d", what); 9514 return -EINVAL; 9515 } 9516 return count; 9517 } 9518 9519 static ssize_t tpacpi_battery_show(int what, 9520 struct device *dev, 9521 char *buf) 9522 { 9523 struct power_supply *supply = to_power_supply(dev); 9524 int ret, battery; 9525 /* 9526 * Some systems have support for more than 9527 * one battery. If that is the case, 9528 * tpacpi_battery_probe marked that addressing 9529 * them individually is supported, so we; 9530 * based on the device struct. 9531 * 9532 * On systems that are not supported, we assume 9533 * the primary as most of the ACPI calls fail 9534 * with "Any Battery" as the parameter. 9535 */ 9536 if (battery_info.individual_addressing) 9537 /* BAT_PRIMARY or BAT_SECONDARY */ 9538 battery = tpacpi_battery_get_id(supply->desc->name); 9539 else 9540 battery = BAT_PRIMARY; 9541 if (tpacpi_battery_get(what, battery, &ret)) 9542 return -ENODEV; 9543 return sprintf(buf, "%d\n", ret); 9544 } 9545 9546 static ssize_t charge_start_threshold_show(struct device *device, 9547 struct device_attribute *attr, 9548 char *buf) 9549 { 9550 return tpacpi_battery_show(THRESHOLD_START, device, buf); 9551 } 9552 9553 static ssize_t charge_stop_threshold_show(struct device *device, 9554 struct device_attribute *attr, 9555 char *buf) 9556 { 9557 return tpacpi_battery_show(THRESHOLD_STOP, device, buf); 9558 } 9559 9560 static ssize_t charge_start_threshold_store(struct device *dev, 9561 struct device_attribute *attr, 9562 const char *buf, size_t count) 9563 { 9564 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count); 9565 } 9566 9567 static ssize_t charge_stop_threshold_store(struct device *dev, 9568 struct device_attribute *attr, 9569 const char *buf, size_t count) 9570 { 9571 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count); 9572 } 9573 9574 static DEVICE_ATTR_RW(charge_start_threshold); 9575 static DEVICE_ATTR_RW(charge_stop_threshold); 9576 9577 static struct attribute *tpacpi_battery_attrs[] = { 9578 &dev_attr_charge_start_threshold.attr, 9579 &dev_attr_charge_stop_threshold.attr, 9580 NULL, 9581 }; 9582 9583 ATTRIBUTE_GROUPS(tpacpi_battery); 9584 9585 /* ACPI battery hooking */ 9586 9587 static int tpacpi_battery_add(struct power_supply *battery) 9588 { 9589 int batteryid = tpacpi_battery_get_id(battery->desc->name); 9590 9591 if (tpacpi_battery_probe(batteryid)) 9592 return -ENODEV; 9593 if (device_add_groups(&battery->dev, tpacpi_battery_groups)) 9594 return -ENODEV; 9595 return 0; 9596 } 9597 9598 static int tpacpi_battery_remove(struct power_supply *battery) 9599 { 9600 device_remove_groups(&battery->dev, tpacpi_battery_groups); 9601 return 0; 9602 } 9603 9604 static struct acpi_battery_hook battery_hook = { 9605 .add_battery = tpacpi_battery_add, 9606 .remove_battery = tpacpi_battery_remove, 9607 .name = "ThinkPad Battery Extension", 9608 }; 9609 9610 /* Subdriver init/exit */ 9611 9612 static const struct tpacpi_quirk battery_quirk_table[] __initconst = { 9613 /* 9614 * Individual addressing is broken on models that expose the 9615 * primary battery as BAT1. 9616 */ 9617 TPACPI_Q_LNV('J', '7', true), /* B5400 */ 9618 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */ 9619 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */ 9620 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */ 9621 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */ 9622 }; 9623 9624 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm) 9625 { 9626 memset(&battery_info, 0, sizeof(battery_info)); 9627 9628 tp_features.battery_force_primary = tpacpi_check_quirks( 9629 battery_quirk_table, 9630 ARRAY_SIZE(battery_quirk_table)); 9631 9632 battery_hook_register(&battery_hook); 9633 return 0; 9634 } 9635 9636 static void tpacpi_battery_exit(void) 9637 { 9638 battery_hook_unregister(&battery_hook); 9639 } 9640 9641 static struct ibm_struct battery_driver_data = { 9642 .name = "battery", 9643 .exit = tpacpi_battery_exit, 9644 }; 9645 9646 /**************************************************************************** 9647 **************************************************************************** 9648 * 9649 * Infrastructure 9650 * 9651 **************************************************************************** 9652 ****************************************************************************/ 9653 9654 /* 9655 * HKEY event callout for other subdrivers go here 9656 * (yes, it is ugly, but it is quick, safe, and gets the job done 9657 */ 9658 static void tpacpi_driver_event(const unsigned int hkey_event) 9659 { 9660 if (ibm_backlight_device) { 9661 switch (hkey_event) { 9662 case TP_HKEY_EV_BRGHT_UP: 9663 case TP_HKEY_EV_BRGHT_DOWN: 9664 tpacpi_brightness_notify_change(); 9665 } 9666 } 9667 if (alsa_card) { 9668 switch (hkey_event) { 9669 case TP_HKEY_EV_VOL_UP: 9670 case TP_HKEY_EV_VOL_DOWN: 9671 case TP_HKEY_EV_VOL_MUTE: 9672 volume_alsa_notify_change(); 9673 } 9674 } 9675 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) { 9676 enum led_brightness brightness; 9677 9678 mutex_lock(&kbdlight_mutex); 9679 9680 /* 9681 * Check the brightness actually changed, setting the brightness 9682 * through kbdlight_set_level() also triggers this event. 9683 */ 9684 brightness = kbdlight_sysfs_get(NULL); 9685 if (kbdlight_brightness != brightness) { 9686 kbdlight_brightness = brightness; 9687 led_classdev_notify_brightness_hw_changed( 9688 &tpacpi_led_kbdlight.led_classdev, brightness); 9689 } 9690 9691 mutex_unlock(&kbdlight_mutex); 9692 } 9693 } 9694 9695 static void hotkey_driver_event(const unsigned int scancode) 9696 { 9697 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9698 } 9699 9700 /* --------------------------------------------------------------------- */ 9701 9702 /* /proc support */ 9703 static struct proc_dir_entry *proc_dir; 9704 9705 /* 9706 * Module and infrastructure proble, init and exit handling 9707 */ 9708 9709 static bool force_load; 9710 9711 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9712 static const char * __init str_supported(int is_supported) 9713 { 9714 static char text_unsupported[] __initdata = "not supported"; 9715 9716 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9717 } 9718 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9719 9720 static void ibm_exit(struct ibm_struct *ibm) 9721 { 9722 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9723 9724 list_del_init(&ibm->all_drivers); 9725 9726 if (ibm->flags.acpi_notify_installed) { 9727 dbg_printk(TPACPI_DBG_EXIT, 9728 "%s: acpi_remove_notify_handler\n", ibm->name); 9729 BUG_ON(!ibm->acpi); 9730 acpi_remove_notify_handler(*ibm->acpi->handle, 9731 ibm->acpi->type, 9732 dispatch_acpi_notify); 9733 ibm->flags.acpi_notify_installed = 0; 9734 } 9735 9736 if (ibm->flags.proc_created) { 9737 dbg_printk(TPACPI_DBG_EXIT, 9738 "%s: remove_proc_entry\n", ibm->name); 9739 remove_proc_entry(ibm->name, proc_dir); 9740 ibm->flags.proc_created = 0; 9741 } 9742 9743 if (ibm->flags.acpi_driver_registered) { 9744 dbg_printk(TPACPI_DBG_EXIT, 9745 "%s: acpi_bus_unregister_driver\n", ibm->name); 9746 BUG_ON(!ibm->acpi); 9747 acpi_bus_unregister_driver(ibm->acpi->driver); 9748 kfree(ibm->acpi->driver); 9749 ibm->acpi->driver = NULL; 9750 ibm->flags.acpi_driver_registered = 0; 9751 } 9752 9753 if (ibm->flags.init_called && ibm->exit) { 9754 ibm->exit(); 9755 ibm->flags.init_called = 0; 9756 } 9757 9758 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9759 } 9760 9761 static int __init ibm_init(struct ibm_init_struct *iibm) 9762 { 9763 int ret; 9764 struct ibm_struct *ibm = iibm->data; 9765 struct proc_dir_entry *entry; 9766 9767 BUG_ON(ibm == NULL); 9768 9769 INIT_LIST_HEAD(&ibm->all_drivers); 9770 9771 if (ibm->flags.experimental && !experimental) 9772 return 0; 9773 9774 dbg_printk(TPACPI_DBG_INIT, 9775 "probing for %s\n", ibm->name); 9776 9777 if (iibm->init) { 9778 ret = iibm->init(iibm); 9779 if (ret > 0) 9780 return 0; /* probe failed */ 9781 if (ret) 9782 return ret; 9783 9784 ibm->flags.init_called = 1; 9785 } 9786 9787 if (ibm->acpi) { 9788 if (ibm->acpi->hid) { 9789 ret = register_tpacpi_subdriver(ibm); 9790 if (ret) 9791 goto err_out; 9792 } 9793 9794 if (ibm->acpi->notify) { 9795 ret = setup_acpi_notify(ibm); 9796 if (ret == -ENODEV) { 9797 pr_notice("disabling subdriver %s\n", 9798 ibm->name); 9799 ret = 0; 9800 goto err_out; 9801 } 9802 if (ret < 0) 9803 goto err_out; 9804 } 9805 } 9806 9807 dbg_printk(TPACPI_DBG_INIT, 9808 "%s installed\n", ibm->name); 9809 9810 if (ibm->read) { 9811 umode_t mode = iibm->base_procfs_mode; 9812 9813 if (!mode) 9814 mode = S_IRUGO; 9815 if (ibm->write) 9816 mode |= S_IWUSR; 9817 entry = proc_create_data(ibm->name, mode, proc_dir, 9818 &dispatch_proc_fops, ibm); 9819 if (!entry) { 9820 pr_err("unable to create proc entry %s\n", ibm->name); 9821 ret = -ENODEV; 9822 goto err_out; 9823 } 9824 ibm->flags.proc_created = 1; 9825 } 9826 9827 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9828 9829 return 0; 9830 9831 err_out: 9832 dbg_printk(TPACPI_DBG_INIT, 9833 "%s: at error exit path with result %d\n", 9834 ibm->name, ret); 9835 9836 ibm_exit(ibm); 9837 return (ret < 0) ? ret : 0; 9838 } 9839 9840 /* Probing */ 9841 9842 static char __init tpacpi_parse_fw_id(const char * const s, 9843 u32 *model, u16 *release) 9844 { 9845 int i; 9846 9847 if (!s || strlen(s) < 8) 9848 goto invalid; 9849 9850 for (i = 0; i < 8; i++) 9851 if (!((s[i] >= '0' && s[i] <= '9') || 9852 (s[i] >= 'A' && s[i] <= 'Z'))) 9853 goto invalid; 9854 9855 /* 9856 * Most models: xxyTkkWW (#.##c) 9857 * Ancient 570/600 and -SL lacks (#.##c) 9858 */ 9859 if (s[3] == 'T' || s[3] == 'N') { 9860 *model = TPID(s[0], s[1]); 9861 *release = TPVER(s[4], s[5]); 9862 return s[2]; 9863 9864 /* New models: xxxyTkkW (#.##c); T550 and some others */ 9865 } else if (s[4] == 'T' || s[4] == 'N') { 9866 *model = TPID3(s[0], s[1], s[2]); 9867 *release = TPVER(s[5], s[6]); 9868 return s[3]; 9869 } 9870 9871 invalid: 9872 return '\0'; 9873 } 9874 9875 /* returns 0 - probe ok, or < 0 - probe error. 9876 * Probe ok doesn't mean thinkpad found. 9877 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 9878 static int __must_check __init get_thinkpad_model_data( 9879 struct thinkpad_id_data *tp) 9880 { 9881 const struct dmi_device *dev = NULL; 9882 char ec_fw_string[18]; 9883 char const *s; 9884 char t; 9885 9886 if (!tp) 9887 return -EINVAL; 9888 9889 memset(tp, 0, sizeof(*tp)); 9890 9891 if (dmi_name_in_vendors("IBM")) 9892 tp->vendor = PCI_VENDOR_ID_IBM; 9893 else if (dmi_name_in_vendors("LENOVO")) 9894 tp->vendor = PCI_VENDOR_ID_LENOVO; 9895 else 9896 return 0; 9897 9898 s = dmi_get_system_info(DMI_BIOS_VERSION); 9899 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 9900 if (s && !tp->bios_version_str) 9901 return -ENOMEM; 9902 9903 /* Really ancient ThinkPad 240X will fail this, which is fine */ 9904 t = tpacpi_parse_fw_id(tp->bios_version_str, 9905 &tp->bios_model, &tp->bios_release); 9906 if (t != 'E' && t != 'C') 9907 return 0; 9908 9909 /* 9910 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 9911 * X32 or newer, all Z series; Some models must have an 9912 * up-to-date BIOS or they will not be detected. 9913 * 9914 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9915 */ 9916 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 9917 if (sscanf(dev->name, 9918 "IBM ThinkPad Embedded Controller -[%17c", 9919 ec_fw_string) == 1) { 9920 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 9921 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 9922 9923 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 9924 if (!tp->ec_version_str) 9925 return -ENOMEM; 9926 9927 t = tpacpi_parse_fw_id(ec_fw_string, 9928 &tp->ec_model, &tp->ec_release); 9929 if (t != 'H') { 9930 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n", 9931 ec_fw_string); 9932 pr_notice("please report this to %s\n", 9933 TPACPI_MAIL); 9934 } 9935 break; 9936 } 9937 } 9938 9939 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 9940 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 9941 tp->model_str = kstrdup(s, GFP_KERNEL); 9942 if (!tp->model_str) 9943 return -ENOMEM; 9944 } else { 9945 s = dmi_get_system_info(DMI_BIOS_VENDOR); 9946 if (s && !(strncasecmp(s, "Lenovo", 6))) { 9947 tp->model_str = kstrdup(s, GFP_KERNEL); 9948 if (!tp->model_str) 9949 return -ENOMEM; 9950 } 9951 } 9952 9953 s = dmi_get_system_info(DMI_PRODUCT_NAME); 9954 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 9955 if (s && !tp->nummodel_str) 9956 return -ENOMEM; 9957 9958 return 0; 9959 } 9960 9961 static int __init probe_for_thinkpad(void) 9962 { 9963 int is_thinkpad; 9964 9965 if (acpi_disabled) 9966 return -ENODEV; 9967 9968 /* It would be dangerous to run the driver in this case */ 9969 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 9970 return -ENODEV; 9971 9972 /* 9973 * Non-ancient models have better DMI tagging, but very old models 9974 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 9975 */ 9976 is_thinkpad = (thinkpad_id.model_str != NULL) || 9977 (thinkpad_id.ec_model != 0) || 9978 tpacpi_is_fw_known(); 9979 9980 /* The EC handler is required */ 9981 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 9982 if (!ec_handle) { 9983 if (is_thinkpad) 9984 pr_err("Not yet supported ThinkPad detected!\n"); 9985 return -ENODEV; 9986 } 9987 9988 if (!is_thinkpad && !force_load) 9989 return -ENODEV; 9990 9991 return 0; 9992 } 9993 9994 static void __init thinkpad_acpi_init_banner(void) 9995 { 9996 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 9997 pr_info("%s\n", TPACPI_URL); 9998 9999 pr_info("ThinkPad BIOS %s, EC %s\n", 10000 (thinkpad_id.bios_version_str) ? 10001 thinkpad_id.bios_version_str : "unknown", 10002 (thinkpad_id.ec_version_str) ? 10003 thinkpad_id.ec_version_str : "unknown"); 10004 10005 BUG_ON(!thinkpad_id.vendor); 10006 10007 if (thinkpad_id.model_str) 10008 pr_info("%s %s, model %s\n", 10009 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 10010 "IBM" : ((thinkpad_id.vendor == 10011 PCI_VENDOR_ID_LENOVO) ? 10012 "Lenovo" : "Unknown vendor"), 10013 thinkpad_id.model_str, 10014 (thinkpad_id.nummodel_str) ? 10015 thinkpad_id.nummodel_str : "unknown"); 10016 } 10017 10018 /* Module init, exit, parameters */ 10019 10020 static struct ibm_init_struct ibms_init[] __initdata = { 10021 { 10022 .data = &thinkpad_acpi_driver_data, 10023 }, 10024 { 10025 .init = hotkey_init, 10026 .data = &hotkey_driver_data, 10027 }, 10028 { 10029 .init = bluetooth_init, 10030 .data = &bluetooth_driver_data, 10031 }, 10032 { 10033 .init = wan_init, 10034 .data = &wan_driver_data, 10035 }, 10036 { 10037 .init = uwb_init, 10038 .data = &uwb_driver_data, 10039 }, 10040 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 10041 { 10042 .init = video_init, 10043 .base_procfs_mode = S_IRUSR, 10044 .data = &video_driver_data, 10045 }, 10046 #endif 10047 { 10048 .init = kbdlight_init, 10049 .data = &kbdlight_driver_data, 10050 }, 10051 { 10052 .init = light_init, 10053 .data = &light_driver_data, 10054 }, 10055 { 10056 .init = cmos_init, 10057 .data = &cmos_driver_data, 10058 }, 10059 { 10060 .init = led_init, 10061 .data = &led_driver_data, 10062 }, 10063 { 10064 .init = beep_init, 10065 .data = &beep_driver_data, 10066 }, 10067 { 10068 .init = thermal_init, 10069 .data = &thermal_driver_data, 10070 }, 10071 { 10072 .init = brightness_init, 10073 .data = &brightness_driver_data, 10074 }, 10075 { 10076 .init = volume_init, 10077 .data = &volume_driver_data, 10078 }, 10079 { 10080 .init = fan_init, 10081 .data = &fan_driver_data, 10082 }, 10083 { 10084 .init = mute_led_init, 10085 .data = &mute_led_driver_data, 10086 }, 10087 { 10088 .init = tpacpi_battery_init, 10089 .data = &battery_driver_data, 10090 }, 10091 }; 10092 10093 static int __init set_ibm_param(const char *val, const struct kernel_param *kp) 10094 { 10095 unsigned int i; 10096 struct ibm_struct *ibm; 10097 10098 if (!kp || !kp->name || !val) 10099 return -EINVAL; 10100 10101 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10102 ibm = ibms_init[i].data; 10103 WARN_ON(ibm == NULL); 10104 10105 if (!ibm || !ibm->name) 10106 continue; 10107 10108 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 10109 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 10110 return -ENOSPC; 10111 strcpy(ibms_init[i].param, val); 10112 strcat(ibms_init[i].param, ","); 10113 return 0; 10114 } 10115 } 10116 10117 return -EINVAL; 10118 } 10119 10120 module_param(experimental, int, 0444); 10121 MODULE_PARM_DESC(experimental, 10122 "Enables experimental features when non-zero"); 10123 10124 module_param_named(debug, dbg_level, uint, 0); 10125 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 10126 10127 module_param(force_load, bool, 0444); 10128 MODULE_PARM_DESC(force_load, 10129 "Attempts to load the driver even on a mis-identified ThinkPad when true"); 10130 10131 module_param_named(fan_control, fan_control_allowed, bool, 0444); 10132 MODULE_PARM_DESC(fan_control, 10133 "Enables setting fan parameters features when true"); 10134 10135 module_param_named(brightness_mode, brightness_mode, uint, 0444); 10136 MODULE_PARM_DESC(brightness_mode, 10137 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 10138 10139 module_param(brightness_enable, uint, 0444); 10140 MODULE_PARM_DESC(brightness_enable, 10141 "Enables backlight control when 1, disables when 0"); 10142 10143 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 10144 module_param_named(volume_mode, volume_mode, uint, 0444); 10145 MODULE_PARM_DESC(volume_mode, 10146 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 10147 10148 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 10149 MODULE_PARM_DESC(volume_capabilities, 10150 "Selects the mixer capabilites: 0=auto, 1=volume and mute, 2=mute only"); 10151 10152 module_param_named(volume_control, volume_control_allowed, bool, 0444); 10153 MODULE_PARM_DESC(volume_control, 10154 "Enables software override for the console audio control when true"); 10155 10156 module_param_named(software_mute, software_mute_requested, bool, 0444); 10157 MODULE_PARM_DESC(software_mute, 10158 "Request full software mute control"); 10159 10160 /* ALSA module API parameters */ 10161 module_param_named(index, alsa_index, int, 0444); 10162 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 10163 module_param_named(id, alsa_id, charp, 0444); 10164 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 10165 module_param_named(enable, alsa_enable, bool, 0444); 10166 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 10167 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 10168 10169 /* The module parameter can't be read back, that's why 0 is used here */ 10170 #define TPACPI_PARAM(feature) \ 10171 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 10172 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation") 10173 10174 TPACPI_PARAM(hotkey); 10175 TPACPI_PARAM(bluetooth); 10176 TPACPI_PARAM(video); 10177 TPACPI_PARAM(light); 10178 TPACPI_PARAM(cmos); 10179 TPACPI_PARAM(led); 10180 TPACPI_PARAM(beep); 10181 TPACPI_PARAM(brightness); 10182 TPACPI_PARAM(volume); 10183 TPACPI_PARAM(fan); 10184 10185 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10186 module_param(dbg_wlswemul, uint, 0444); 10187 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 10188 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 10189 MODULE_PARM_DESC(wlsw_state, 10190 "Initial state of the emulated WLSW switch"); 10191 10192 module_param(dbg_bluetoothemul, uint, 0444); 10193 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 10194 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 10195 MODULE_PARM_DESC(bluetooth_state, 10196 "Initial state of the emulated bluetooth switch"); 10197 10198 module_param(dbg_wwanemul, uint, 0444); 10199 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 10200 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 10201 MODULE_PARM_DESC(wwan_state, 10202 "Initial state of the emulated WWAN switch"); 10203 10204 module_param(dbg_uwbemul, uint, 0444); 10205 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 10206 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 10207 MODULE_PARM_DESC(uwb_state, 10208 "Initial state of the emulated UWB switch"); 10209 #endif 10210 10211 static void thinkpad_acpi_module_exit(void) 10212 { 10213 struct ibm_struct *ibm, *itmp; 10214 10215 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 10216 10217 list_for_each_entry_safe_reverse(ibm, itmp, 10218 &tpacpi_all_drivers, 10219 all_drivers) { 10220 ibm_exit(ibm); 10221 } 10222 10223 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 10224 10225 if (tpacpi_inputdev) { 10226 if (tp_features.input_device_registered) 10227 input_unregister_device(tpacpi_inputdev); 10228 else 10229 input_free_device(tpacpi_inputdev); 10230 kfree(hotkey_keycode_map); 10231 } 10232 10233 if (tpacpi_hwmon) 10234 hwmon_device_unregister(tpacpi_hwmon); 10235 10236 if (tpacpi_sensors_pdev) 10237 platform_device_unregister(tpacpi_sensors_pdev); 10238 if (tpacpi_pdev) 10239 platform_device_unregister(tpacpi_pdev); 10240 10241 if (tp_features.sensors_pdrv_attrs_registered) 10242 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 10243 if (tp_features.platform_drv_attrs_registered) 10244 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 10245 10246 if (tp_features.sensors_pdrv_registered) 10247 platform_driver_unregister(&tpacpi_hwmon_pdriver); 10248 10249 if (tp_features.platform_drv_registered) 10250 platform_driver_unregister(&tpacpi_pdriver); 10251 10252 if (proc_dir) 10253 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 10254 10255 if (tpacpi_wq) 10256 destroy_workqueue(tpacpi_wq); 10257 10258 kfree(thinkpad_id.bios_version_str); 10259 kfree(thinkpad_id.ec_version_str); 10260 kfree(thinkpad_id.model_str); 10261 kfree(thinkpad_id.nummodel_str); 10262 } 10263 10264 10265 static int __init thinkpad_acpi_module_init(void) 10266 { 10267 int ret, i; 10268 10269 tpacpi_lifecycle = TPACPI_LIFE_INIT; 10270 10271 /* Driver-level probe */ 10272 10273 ret = get_thinkpad_model_data(&thinkpad_id); 10274 if (ret) { 10275 pr_err("unable to get DMI data: %d\n", ret); 10276 thinkpad_acpi_module_exit(); 10277 return ret; 10278 } 10279 ret = probe_for_thinkpad(); 10280 if (ret) { 10281 thinkpad_acpi_module_exit(); 10282 return ret; 10283 } 10284 10285 /* Driver initialization */ 10286 10287 thinkpad_acpi_init_banner(); 10288 tpacpi_check_outdated_fw(); 10289 10290 TPACPI_ACPIHANDLE_INIT(ecrd); 10291 TPACPI_ACPIHANDLE_INIT(ecwr); 10292 10293 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 10294 if (!tpacpi_wq) { 10295 thinkpad_acpi_module_exit(); 10296 return -ENOMEM; 10297 } 10298 10299 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 10300 if (!proc_dir) { 10301 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 10302 thinkpad_acpi_module_exit(); 10303 return -ENODEV; 10304 } 10305 10306 ret = platform_driver_register(&tpacpi_pdriver); 10307 if (ret) { 10308 pr_err("unable to register main platform driver\n"); 10309 thinkpad_acpi_module_exit(); 10310 return ret; 10311 } 10312 tp_features.platform_drv_registered = 1; 10313 10314 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 10315 if (ret) { 10316 pr_err("unable to register hwmon platform driver\n"); 10317 thinkpad_acpi_module_exit(); 10318 return ret; 10319 } 10320 tp_features.sensors_pdrv_registered = 1; 10321 10322 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 10323 if (!ret) { 10324 tp_features.platform_drv_attrs_registered = 1; 10325 ret = tpacpi_create_driver_attributes( 10326 &tpacpi_hwmon_pdriver.driver); 10327 } 10328 if (ret) { 10329 pr_err("unable to create sysfs driver attributes\n"); 10330 thinkpad_acpi_module_exit(); 10331 return ret; 10332 } 10333 tp_features.sensors_pdrv_attrs_registered = 1; 10334 10335 10336 /* Device initialization */ 10337 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 10338 NULL, 0); 10339 if (IS_ERR(tpacpi_pdev)) { 10340 ret = PTR_ERR(tpacpi_pdev); 10341 tpacpi_pdev = NULL; 10342 pr_err("unable to register platform device\n"); 10343 thinkpad_acpi_module_exit(); 10344 return ret; 10345 } 10346 tpacpi_sensors_pdev = platform_device_register_simple( 10347 TPACPI_HWMON_DRVR_NAME, 10348 -1, NULL, 0); 10349 if (IS_ERR(tpacpi_sensors_pdev)) { 10350 ret = PTR_ERR(tpacpi_sensors_pdev); 10351 tpacpi_sensors_pdev = NULL; 10352 pr_err("unable to register hwmon platform device\n"); 10353 thinkpad_acpi_module_exit(); 10354 return ret; 10355 } 10356 tp_features.sensors_pdev_attrs_registered = 1; 10357 tpacpi_hwmon = hwmon_device_register_with_groups( 10358 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL); 10359 10360 if (IS_ERR(tpacpi_hwmon)) { 10361 ret = PTR_ERR(tpacpi_hwmon); 10362 tpacpi_hwmon = NULL; 10363 pr_err("unable to register hwmon device\n"); 10364 thinkpad_acpi_module_exit(); 10365 return ret; 10366 } 10367 mutex_init(&tpacpi_inputdev_send_mutex); 10368 tpacpi_inputdev = input_allocate_device(); 10369 if (!tpacpi_inputdev) { 10370 thinkpad_acpi_module_exit(); 10371 return -ENOMEM; 10372 } else { 10373 /* Prepare input device, but don't register */ 10374 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 10375 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 10376 tpacpi_inputdev->id.bustype = BUS_HOST; 10377 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 10378 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 10379 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 10380 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 10381 } 10382 10383 /* Init subdriver dependencies */ 10384 tpacpi_detect_brightness_capabilities(); 10385 10386 /* Init subdrivers */ 10387 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10388 ret = ibm_init(&ibms_init[i]); 10389 if (ret >= 0 && *ibms_init[i].param) 10390 ret = ibms_init[i].data->write(ibms_init[i].param); 10391 if (ret < 0) { 10392 thinkpad_acpi_module_exit(); 10393 return ret; 10394 } 10395 } 10396 10397 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 10398 10399 ret = input_register_device(tpacpi_inputdev); 10400 if (ret < 0) { 10401 pr_err("unable to register input device\n"); 10402 thinkpad_acpi_module_exit(); 10403 return ret; 10404 } else { 10405 tp_features.input_device_registered = 1; 10406 } 10407 10408 return 0; 10409 } 10410 10411 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 10412 10413 /* 10414 * This will autoload the driver in almost every ThinkPad 10415 * in widespread use. 10416 * 10417 * Only _VERY_ old models, like the 240, 240x and 570 lack 10418 * the HKEY event interface. 10419 */ 10420 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 10421 10422 /* 10423 * DMI matching for module autoloading 10424 * 10425 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10426 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 10427 * 10428 * Only models listed in thinkwiki will be supported, so add yours 10429 * if it is not there yet. 10430 */ 10431 #define IBM_BIOS_MODULE_ALIAS(__type) \ 10432 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 10433 10434 /* Ancient thinkpad BIOSes have to be identified by 10435 * BIOS type or model number, and there are far less 10436 * BIOS types than model numbers... */ 10437 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 10438 10439 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 10440 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 10441 MODULE_DESCRIPTION(TPACPI_DESC); 10442 MODULE_VERSION(TPACPI_VERSION); 10443 MODULE_LICENSE("GPL"); 10444 10445 module_init(thinkpad_acpi_module_init); 10446 module_exit(thinkpad_acpi_module_exit); 10447